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freebsd-skq/sys/netinet/ip_output.c

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BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Copyright (c) 1982, 1986, 1988, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ip_output.c 8.3 (Berkeley) 1/21/94
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
#define _IP_VHL
Don't expect the new code to be used without the right option file being included.
1998-07-06 05:04:33 +00:00
#include "opt_ipfw.h"
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
#include "opt_ipdn.h"
Make IPDIVERT a supported option. Alas, in_var.h depends on it, i hope i've found out all files that actually depend on this dependancy. IMHO, it's not very good practice to change the size of internal structs depending on kernel options.
1997-11-05 20:17:23 +00:00
#include "opt_ipdivert.h"
Make this compile.. There are some unpleasing hacks in here. A major unifdef session is sorely tempting but would destroy any remaining chance of tracking the original sources.
1998-03-21 11:34:28 +00:00
#include "opt_ipfilter.h"
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
#include "opt_ipsec.h"
activate pfil_hooks and covert ipfilter to use it
2000-07-31 13:11:42 +00:00
#include "opt_pfil_hooks.h"
Add ``options RANDOM_IP_ID'' which randomizes the ID field of IP packets. This closes a minor information leak which allows a remote observer to determine the rate at which the machine is generating packets, since the default behaviour is to increment a counter for each packet sent. Reviewed by: -net Obtained from: OpenBSD
2001-06-01 10:02:28 +00:00
#include "opt_random_ip_id.h"
Make IPDIVERT a supported option. Alas, in_var.h depends on it, i hope i've found out all files that actually depend on this dependancy. IMHO, it's not very good practice to change the size of internal structs depending on kernel options.
1997-11-05 20:17:23 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/param.h>
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
#include <sys/systm.h>
Restore 1.82->1.83 change deleted by mistake< per Bruce suggestion
1998-12-21 21:36:40 +00:00
#include <sys/kernel.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
#include <machine/in_cksum.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Last major round (Unless Bruce thinks of somthing :-) of malloc changes. Distribute all but the most fundamental malloc types. This time I also remembered the trick to making things static: Put "static" in front of them. A couple of finer points by: bde
1997-10-12 20:26:33 +00:00
static MALLOC_DEFINE(M_IPMOPTS, "ip_moptions", "internet multicast options");
Distribute and statizice a lot of the malloc M_* types. Substantial input from: bde
1997-10-11 18:31:40 +00:00
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
#ifdef IPSEC
#include <netinet6/ipsec.h>
#include <netkey/key.h>
#ifdef IPSEC_DEBUG
#include <netkey/key_debug.h>
#else
#define KEYDEBUG(lev,arg)
#endif
#endif /*IPSEC*/
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
#include <netinet/ip_fw.h>
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
#include <netinet/ip_dummynet.h>
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
#define print_ip(x, a, y) printf("%s %d.%d.%d.%d%s",\
x, (ntohl(a.s_addr)>>24)&0xFF,\
(ntohl(a.s_addr)>>16)&0xFF,\
(ntohl(a.s_addr)>>8)&0xFF,\
(ntohl(a.s_addr))&0xFF, y);
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
Fix up some sloppy coding practices: - Delete redundant declarations. - Add -Wredundant-declarations to Makefile.i386 so they don't come back. - Delete sloppy COMMON-style declarations of uninitialized data in header files. - Add a few prototypes. - Clean up warnings resulting from the above. NB: ioconf.c will still generate a redundant-declaration warning, which is unavoidable unless somebody volunteers to make `config' smarter.
1994-08-18 22:36:09 +00:00
u_short ip_id;
Remove __P.
2002-03-19 21:25:46 +00:00
static struct mbuf *ip_insertoptions(struct mbuf *, struct mbuf *, int *);
static struct ifnet *ip_multicast_if(struct in_addr *, int *);
New style sysctl & staticize alot of stuff.
1995-11-14 20:34:56 +00:00
static void ip_mloopback
Remove __P.
2002-03-19 21:25:46 +00:00
(struct ifnet *, struct mbuf *, struct sockaddr_in *, int);
New style sysctl & staticize alot of stuff.
1995-11-14 20:34:56 +00:00
static int ip_getmoptions
Remove __P.
2002-03-19 21:25:46 +00:00
(struct sockopt *, struct ip_moptions *);
static int ip_pcbopts(int, struct mbuf **, struct mbuf *);
New style sysctl & staticize alot of stuff.
1995-11-14 20:34:56 +00:00
static int ip_setmoptions
Remove __P.
2002-03-19 21:25:46 +00:00
(struct sockopt *, struct ip_moptions **);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Remove __P.
2002-03-19 21:25:46 +00:00
int ip_optcopy(struct ip *, struct ip *);
Add IP Filter hooks (from patches).
1997-02-10 11:45:37 +00:00
Adding changes to ipfw and the kernel to support ip packet diversion.. This stuff should not be too destructive if the IPDIVERT is not compiled in.. be aware that this changes the size of the ip_fw struct so ipfw needs to be recompiled to use it.. more changes coming to clean this up.
1996-07-10 19:44:30 +00:00
extern struct protosw inetsw[];
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* IP output. The packet in mbuf chain m contains a skeletal IP
* header (with len, off, ttl, proto, tos, src, dst).
* The mbuf chain containing the packet will be freed.
* The mbuf opt, if present, will not be freed.
*/
int
ip_output(m0, opt, ro, flags, imo)
struct mbuf *m0;
struct mbuf *opt;
struct route *ro;
int flags;
struct ip_moptions *imo;
{
Add feature for tcp "established". Change interface between netinet and ip_fw to be more general, and thus hopefully also support other ip filtering implementations.
1996-04-03 13:52:20 +00:00
struct ip *ip, *mhip;
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
struct ifnet *ifp = NULL; /* keep compiler happy */
struct mbuf *m;
Add feature for tcp "established". Change interface between netinet and ip_fw to be more general, and thus hopefully also support other ip filtering implementations.
1996-04-03 13:52:20 +00:00
int hlen = sizeof (struct ip);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int len, off, error = 0;
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
struct sockaddr_in *dst = NULL; /* keep compiler happy */
Avoid dereferencing a null pointer in ro_rt. This was always broken in HEAD (the offending statement was introduced in rev. 1.123 for HEAD, while RELENG_4 included this fix (in rev. 1.99.2.12 for RELENG_4) and I inadvertently deleted it in 1.99.2.30. So I am also restoring these two lines in RELENG_4 now. We might need another few things from 1.99.2.30.
2002-07-12 22:08:47 +00:00
struct in_ifaddr *ia = NULL;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
int isbroadcast, sw_csum;
Fix ipfw fwd so that it acts as the docs say when forwarding an incoming packet to another machine. Obtained from: Vicor Production tree MFC after: 3 weeks
2001-12-28 21:21:57 +00:00
struct in_addr pkt_dst;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
#ifdef IPSEC
Prevent icmp_reflect() from calling ip_output() with a NULL route pointer which will then result in the allocated route's reference count never being decremented. Just flood ping the localhost and watch refcnt of the 127.0.0.1 route with netstat(1). Submitted by: jayanth Back out ip_output.c,v 1.143 and ip_mroute.c,v 1.69 that allowed ip_output() to be called with a NULL route pointer. The previous paragraph shows why this was a bad idea in the first place. MFC after: 0 days
2002-03-22 16:45:54 +00:00
struct route iproute;
enable IPsec over DUMMYNET again Submitted by: luigi Reviewed by: luigi
2000-01-09 03:06:28 +00:00
struct socket *so = NULL;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
struct secpolicy *sp = NULL;
#endif
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
struct ip_fw_args args;
int src_was_INADDR_ANY = 0; /* as the name says... */
activate pfil_hooks and covert ipfilter to use it
2000-07-31 13:11:42 +00:00
#ifdef PFIL_HOOKS
struct packet_filter_hook *pfh;
struct mbuf *m1;
int rv;
#endif /* PFIL_HOOKS */
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
args.eh = NULL;
args.rule = NULL;
args.next_hop = NULL;
fix bad indentation and whitespace resulting from cut&paste
2002-06-23 09:15:43 +00:00
args.divert_rule = 0; /* divert cookie */
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
/* Grab info from MT_TAG mbufs prepended to the chain. */
fix bad indentation and whitespace resulting from cut&paste
2002-06-23 09:15:43 +00:00
for (; m0 && m0->m_type == MT_TAG; m0 = m0->m_next) {
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
switch(m0->m_tag_id) {
default:
printf("ip_output: unrecognised MT_TAG tag %d\n",
m0->m_tag_id);
break;
case PACKET_TAG_DUMMYNET:
/*
* the packet was already tagged, so part of the
* processing was already done, and we need to go down.
* Get parameters from the header.
*/
args.rule = ((struct dn_pkt *)m0)->rule;
opt = NULL ;
ro = & ( ((struct dn_pkt *)m0)->ro ) ;
imo = NULL ;
dst = ((struct dn_pkt *)m0)->dn_dst ;
ifp = ((struct dn_pkt *)m0)->ifp ;
flags = ((struct dn_pkt *)m0)->flags ;
break;
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
case PACKET_TAG_DIVERT:
Warning fixes for 64 bits platforms. With this last fix, I can build a GENERIC sparc64 kernel with -Werror. Reviewed by: luigi
2002-06-27 11:02:06 +00:00
args.divert_rule = (intptr_t)m0->m_data & 0xffff;
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
break;
case PACKET_TAG_IPFORWARD:
args.next_hop = (struct sockaddr_in *)m0->m_data;
break;
}
fix bad indentation and whitespace resulting from cut&paste
2002-06-23 09:15:43 +00:00
}
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
m = m0;
KASSERT(!m || (m->m_flags & M_PKTHDR) != 0, ("ip_output: no HDR"));
- Change the newly turned INVARIANTS #ifdef blocks (they were changed from DIAGNOSTIC yesterday) into KASSERT()'s as these help to increase code readability.
2002-05-21 18:52:24 +00:00
KASSERT(ro != NULL, ("ip_output: no route, proto %d",
mtod(m, struct ip *)->ip_p));
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
#ifdef IPSEC
so = ipsec_getsocket(m);
(void)ipsec_setsocket(m, NULL);
#endif
fix bad indentation and whitespace resulting from cut&paste
2002-06-23 09:15:43 +00:00
if (args.rule != NULL) { /* dummynet already saw us */
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
ip = mtod(m, struct ip *);
hlen = IP_VHL_HL(ip->ip_vhl) << 2 ;
Avoid dereferencing a null pointer in ro_rt. This was always broken in HEAD (the offending statement was introduced in rev. 1.123 for HEAD, while RELENG_4 included this fix (in rev. 1.99.2.12 for RELENG_4) and I inadvertently deleted it in 1.99.2.30. So I am also restoring these two lines in RELENG_4 now. We might need another few things from 1.99.2.30.
2002-07-12 22:08:47 +00:00
if (ro->ro_rt)
ia = ifatoia(ro->ro_rt->rt_ifa);
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
goto sendit;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (opt) {
m = ip_insertoptions(m, opt, &len);
hlen = len;
}
ip = mtod(m, struct ip *);
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
pkt_dst = args.next_hop ? args.next_hop->sin_addr : ip->ip_dst;
Fix ipfw fwd so that it acts as the docs say when forwarding an incoming packet to another machine. Obtained from: Vicor Production tree MFC after: 3 weeks
2001-12-28 21:21:57 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Fill in IP header.
*/
if ((flags & (IP_FORWARDING|IP_RAWOUTPUT)) == 0) {
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
ip->ip_vhl = IP_MAKE_VHL(IPVERSION, hlen >> 2);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ip->ip_off &= IP_DF;
Add ``options RANDOM_IP_ID'' which randomizes the ID field of IP packets. This closes a minor information leak which allows a remote observer to determine the rate at which the machine is generating packets, since the default behaviour is to increment a counter for each packet sent. Reviewed by: -net Obtained from: OpenBSD
2001-06-01 10:02:28 +00:00
#ifdef RANDOM_IP_ID
ip->ip_id = ip_randomid();
#else
Follow BSD/OS and NetBSD, keep the ip_id field in network order all the time. Requested by: wollman
2000-09-14 14:42:04 +00:00
ip->ip_id = htons(ip_id++);
Add ``options RANDOM_IP_ID'' which randomizes the ID field of IP packets. This closes a minor information leak which allows a remote observer to determine the rate at which the machine is generating packets, since the default behaviour is to increment a counter for each packet sent. Reviewed by: -net Obtained from: OpenBSD
2001-06-01 10:02:28 +00:00
#endif
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ipstat.ips_localout++;
} else {
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
dst = (struct sockaddr_in *)&ro->ro_dst;
/*
* If there is a cached route,
* check that it is to the same destination
* and is still up. If not, free it and try again.
- Check the address family of the destination cached in a PCB. - Clear the cached destination before getting another cached route. Otherwise, garbage in the padding space (which might be filled in if it was used for IPv4) could annoy rtalloc. Obtained from: KAME
2002-01-21 20:04:22 +00:00
* The address family should also be checked in case of sharing the
* cache with IPv6.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
- Check the address family of the destination cached in a PCB. - Clear the cached destination before getting another cached route. Otherwise, garbage in the padding space (which might be filled in if it was used for IPv4) could annoy rtalloc. Obtained from: KAME
2002-01-21 20:04:22 +00:00
dst->sin_family != AF_INET ||
dst->sin_addr.s_addr != pkt_dst.s_addr)) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
RTFREE(ro->ro_rt);
ro->ro_rt = (struct rtentry *)0;
}
if (ro->ro_rt == 0) {
- Check the address family of the destination cached in a PCB. - Clear the cached destination before getting another cached route. Otherwise, garbage in the padding space (which might be filled in if it was used for IPv4) could annoy rtalloc. Obtained from: KAME
2002-01-21 20:04:22 +00:00
bzero(dst, sizeof(*dst));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
dst->sin_family = AF_INET;
dst->sin_len = sizeof(*dst);
Fix ipfw fwd so that it acts as the docs say when forwarding an incoming packet to another machine. Obtained from: Vicor Production tree MFC after: 3 weeks
2001-12-28 21:21:57 +00:00
dst->sin_addr = pkt_dst;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
/*
* If routing to interface only,
* short circuit routing lookup.
*/
if (flags & IP_ROUTETOIF) {
if ((ia = ifatoia(ifa_ifwithdstaddr(sintosa(dst)))) == 0 &&
(ia = ifatoia(ifa_ifwithnet(sintosa(dst)))) == 0) {
ipstat.ips_noroute++;
error = ENETUNREACH;
goto bad;
}
ifp = ia->ia_ifp;
ip->ip_ttl = 1;
Add three new route flags to help determine what sort of address the destination represents. For IP: - Iff it is a host route, RTF_LOCAL and RTF_BROADCAST indicate local (belongs to this host) and broadcast addresses, respectively. - For all routes, RTF_MULTICAST is set if the destination is multicast. The RTF_BROADCAST flag is used by ip_output() to eliminate a call to in_broadcast() in a common case; this gives about 1% in our packet-generation experiments. All three flags might be used (although they aren't now) to determine whether a packet can be forwarded; a given host route can represent a forwardable address if: (rt->rt_flags & (RTF_HOST | RTF_LOCAL | RTF_BROADCAST | RTF_MULTICAST)) == RTF_HOST Obviously, one still has to do all the work if a host route is not present, but this code allows one to cache the results of such a lookup if rtalloc1() is called without masking RTF_PRCLONING.
1996-05-06 17:42:13 +00:00
isbroadcast = in_broadcast(dst->sin_addr, ifp);
Skip the route checking in the case of multicast packets with known interfaces. Reviewed by: people at that channel Approved by: silence on -net
2001-07-17 18:47:48 +00:00
} else if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) &&
Avoid a NULL pointer derefence introduced in rev. 1.129. Problem noticed by: bde, gcc(1) Panic caught by: mjacob Patch tested by: mjacob
2001-07-23 16:50:01 +00:00
imo != NULL && imo->imo_multicast_ifp != NULL) {
Skip the route checking in the case of multicast packets with known interfaces. Reviewed by: people at that channel Approved by: silence on -net
2001-07-17 18:47:48 +00:00
/*
Avoid a NULL pointer derefence introduced in rev. 1.129. Problem noticed by: bde, gcc(1) Panic caught by: mjacob Patch tested by: mjacob
2001-07-23 16:50:01 +00:00
* Bypass the normal routing lookup for multicast
* packets if the interface is specified.
Skip the route checking in the case of multicast packets with known interfaces. Reviewed by: people at that channel Approved by: silence on -net
2001-07-17 18:47:48 +00:00
*/
Avoid a NULL pointer derefence introduced in rev. 1.129. Problem noticed by: bde, gcc(1) Panic caught by: mjacob Patch tested by: mjacob
2001-07-23 16:50:01 +00:00
ifp = imo->imo_multicast_ifp;
IFP_TO_IA(ifp, ia);
isbroadcast = 0; /* fool gcc */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
} else {
Call rtalloc_ign() so that protocol cloning will not occur at the IP layer.
1994-12-13 23:08:12 +00:00
/*
Backout non-functional changes from revision 1.128. Not objected to by: dcs
2001-07-19 07:10:30 +00:00
* If this is the case, we probably don't want to allocate
* a protocol-cloned route since we didn't get one from the
* ULP. This lets TCP do its thing, while not burdening
* forwarding or ICMP with the overhead of cloning a route.
* Of course, we still want to do any cloning requested by
* the link layer, as this is probably required in all cases
* for correct operation (as it is for ARP).
Call rtalloc_ign() so that protocol cloning will not occur at the IP layer.
1994-12-13 23:08:12 +00:00
*/
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (ro->ro_rt == 0)
Call rtalloc_ign() so that protocol cloning will not occur at the IP layer.
1994-12-13 23:08:12 +00:00
rtalloc_ign(ro, RTF_PRCLONING);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (ro->ro_rt == 0) {
ipstat.ips_noroute++;
error = EHOSTUNREACH;
goto bad;
}
ia = ifatoia(ro->ro_rt->rt_ifa);
ifp = ro->ro_rt->rt_ifp;
ro->ro_rt->rt_use++;
if (ro->ro_rt->rt_flags & RTF_GATEWAY)
Backout non-functional changes from revision 1.128. Not objected to by: dcs
2001-07-19 07:10:30 +00:00
dst = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
Add three new route flags to help determine what sort of address the destination represents. For IP: - Iff it is a host route, RTF_LOCAL and RTF_BROADCAST indicate local (belongs to this host) and broadcast addresses, respectively. - For all routes, RTF_MULTICAST is set if the destination is multicast. The RTF_BROADCAST flag is used by ip_output() to eliminate a call to in_broadcast() in a common case; this gives about 1% in our packet-generation experiments. All three flags might be used (although they aren't now) to determine whether a packet can be forwarded; a given host route can represent a forwardable address if: (rt->rt_flags & (RTF_HOST | RTF_LOCAL | RTF_BROADCAST | RTF_MULTICAST)) == RTF_HOST Obviously, one still has to do all the work if a host route is not present, but this code allows one to cache the results of such a lookup if rtalloc1() is called without masking RTF_PRCLONING.
1996-05-06 17:42:13 +00:00
if (ro->ro_rt->rt_flags & RTF_HOST)
Backout non-functional changes from revision 1.128. Not objected to by: dcs
2001-07-19 07:10:30 +00:00
isbroadcast = (ro->ro_rt->rt_flags & RTF_BROADCAST);
Add three new route flags to help determine what sort of address the destination represents. For IP: - Iff it is a host route, RTF_LOCAL and RTF_BROADCAST indicate local (belongs to this host) and broadcast addresses, respectively. - For all routes, RTF_MULTICAST is set if the destination is multicast. The RTF_BROADCAST flag is used by ip_output() to eliminate a call to in_broadcast() in a common case; this gives about 1% in our packet-generation experiments. All three flags might be used (although they aren't now) to determine whether a packet can be forwarded; a given host route can represent a forwardable address if: (rt->rt_flags & (RTF_HOST | RTF_LOCAL | RTF_BROADCAST | RTF_MULTICAST)) == RTF_HOST Obviously, one still has to do all the work if a host route is not present, but this code allows one to cache the results of such a lookup if rtalloc1() is called without masking RTF_PRCLONING.
1996-05-06 17:42:13 +00:00
else
isbroadcast = in_broadcast(dst->sin_addr, ifp);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Fix ipfw fwd so that it acts as the docs say when forwarding an incoming packet to another machine. Obtained from: Vicor Production tree MFC after: 3 weeks
2001-12-28 21:21:57 +00:00
if (IN_MULTICAST(ntohl(pkt_dst.s_addr))) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct in_multi *inm;
m->m_flags |= M_MCAST;
/*
* IP destination address is multicast. Make sure "dst"
* still points to the address in "ro". (It may have been
* changed to point to a gateway address, above.)
*/
dst = (struct sockaddr_in *)&ro->ro_dst;
/*
* See if the caller provided any multicast options
*/
if (imo != NULL) {
ip->ip_ttl = imo->imo_multicast_ttl;
Kernel side of 3.5 multicast routing code, based on work by Bill Fenner and other work done here. The LKM support is probably broken, but it still compiles and will be fixed later.
1995-06-13 17:51:16 +00:00
if (imo->imo_multicast_vif != -1)
ip->ip_src.s_addr =
ip_mcast_src(imo->imo_multicast_vif);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
} else
ip->ip_ttl = IP_DEFAULT_MULTICAST_TTL;
/*
* Confirm that the outgoing interface supports multicast.
*/
Kernel side of 3.5 multicast routing code, based on work by Bill Fenner and other work done here. The LKM support is probably broken, but it still compiles and will be fixed later.
1995-06-13 17:51:16 +00:00
if ((imo == NULL) || (imo->imo_multicast_vif == -1)) {
if ((ifp->if_flags & IFF_MULTICAST) == 0) {
ipstat.ips_noroute++;
error = ENETUNREACH;
goto bad;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
/*
* If source address not specified yet, use address
* of outgoing interface.
*/
if (ip->ip_src.s_addr == INADDR_ANY) {
Avoid a NULL pointer derefence introduced in rev. 1.129. Problem noticed by: bde, gcc(1) Panic caught by: mjacob Patch tested by: mjacob
2001-07-23 16:50:01 +00:00
/* Interface may have no addresses. */
if (ia != NULL)
ip->ip_src = IA_SIN(ia)->sin_addr;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Pre-calculate the checksum for multicast packets sourced on a multicast router. This is overkill; it should be possible to delay to hardware interfaces and only pre-calculate when forwarding to a tunnel.
2002-01-05 18:23:53 +00:00
if (ip_mrouter && (flags & IP_FORWARDING) == 0) {
/*
* XXX
* delayed checksums are not currently
* compatible with IP multicast routing
*/
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
in_delayed_cksum(m);
m->m_pkthdr.csum_flags &=
~CSUM_DELAY_DATA;
}
}
Fix ipfw fwd so that it acts as the docs say when forwarding an incoming packet to another machine. Obtained from: Vicor Production tree MFC after: 3 weeks
2001-12-28 21:21:57 +00:00
IN_LOOKUP_MULTI(pkt_dst, ifp, inm);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (inm != NULL &&
(imo == NULL || imo->imo_multicast_loop)) {
/*
* If we belong to the destination multicast group
* on the outgoing interface, and the caller did not
* forbid loopback, loop back a copy.
*/
Pull up the IP header in ip_mloopback(). This makes sure that the operations on the header inside ip_mloopback() are performed on a private copy instead of a shared cluster. PR: kern/3410
1997-05-06 21:22:04 +00:00
ip_mloopback(ifp, m, dst, hlen);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
else {
/*
* If we are acting as a multicast router, perform
* multicast forwarding as if the packet had just
* arrived on the interface to which we are about
* to send. The multicast forwarding function
* recursively calls this function, using the
* IP_FORWARDING flag to prevent infinite recursion.
*
* Multicasts that are looped back by ip_mloopback(),
* above, will be forwarded by the ip_input() routine,
* if necessary.
*/
if (ip_mrouter && (flags & IP_FORWARDING) == 0) {
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
/*
* Check if rsvp daemon is running. If not, don't
* set ip_moptions. This ensures that the packet
* is multicast and not just sent down one link
* as prescribed by rsvpd.
*/
Fix test for determining when RSVP is inactive in a router. (In this case, multicast options are not passed to ip_mforward().) The previous version had a wrong test, thus causing RSVP mrouters to forward RSVP messages in violation of the spec.
1995-07-26 18:05:16 +00:00
if (!rsvp_on)
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
imo = NULL;
if (ip_mforward(ip, ifp, m, imo) != 0) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
m_freem(m);
goto done;
}
}
}
Shuffle some functions and variables around to make it possible for multicast routing to be implemented as an LKM. (There's still a bit of work to do in this area.)
1994-09-14 03:10:15 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Multicasts with a time-to-live of zero may be looped-
* back, above, but must not be transmitted on a network.
* Also, multicasts addressed to the loopback interface
* are not sent -- the above call to ip_mloopback() will
* loop back a copy if this host actually belongs to the
* destination group on the loopback interface.
*/
Cleanup loopback interface support. Reviewed by: wollman
1995-04-26 18:10:58 +00:00
if (ip->ip_ttl == 0 || ifp->if_flags & IFF_LOOPBACK) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
m_freem(m);
goto done;
}
goto sendit;
}
#ifndef notdef
/*
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
* If the source address is not specified yet, use the address
* of the outoing interface. In case, keep note we did that, so
* if the the firewall changes the next-hop causing the output
* interface to change, we can fix that.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
if (ip->ip_src.s_addr == INADDR_ANY) {
Avoid a NULL pointer derefence introduced in rev. 1.129. Problem noticed by: bde, gcc(1) Panic caught by: mjacob Patch tested by: mjacob
2001-07-23 16:50:01 +00:00
/* Interface may have no addresses. */
if (ia != NULL) {
ip->ip_src = IA_SIN(ia)->sin_addr;
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
src_was_INADDR_ANY = 1;
Avoid a NULL pointer derefence introduced in rev. 1.129. Problem noticed by: bde, gcc(1) Panic caught by: mjacob Patch tested by: mjacob
2001-07-23 16:50:01 +00:00
}
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
}
#endif /* notdef */
fixed bug where large amounts of unidirectional UDP traffic would fill the interface output queue and further udp packets would be fragmented and only partially sent - keeping the output queue full and jamming the network, but not actually getting any real work done (because you can't send just 'part' of a udp packet - if you fragment it, you must send the whole thing). The fix involves adding a check to make sure that the output queue has sufficient space for all of the fragments.
1994-08-01 12:01:45 +00:00
/*
* Verify that we have any chance at all of being able to queue
* the packet or packet fragments
*/
if ((ifp->if_snd.ifq_len + ip->ip_len / ifp->if_mtu + 1) >=
ifp->if_snd.ifq_maxlen) {
error = ENOBUFS;
When dropping a packet because there is no room in the queue (which itself is somewhat bogus), update the statistics to indicate something was dropped. PR: 13740
2001-10-30 14:58:27 +00:00
ipstat.ips_odropped++;
fixed bug where large amounts of unidirectional UDP traffic would fill the interface output queue and further udp packets would be fragmented and only partially sent - keeping the output queue full and jamming the network, but not actually getting any real work done (because you can't send just 'part' of a udp packet - if you fragment it, you must send the whole thing). The fix involves adding a check to make sure that the output queue has sufficient space for all of the fragments.
1994-08-01 12:01:45 +00:00
goto bad;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Look for broadcast address and
RFC1122 requires that addresses of the form { 127, <any> } MUST NOT appear outside a host. PR: 30792, 33996 Obtained from: ip_input.c MFC after: 1 week
2002-01-21 13:59:42 +00:00
* verify user is allowed to send
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
* such a packet.
*/
Add three new route flags to help determine what sort of address the destination represents. For IP: - Iff it is a host route, RTF_LOCAL and RTF_BROADCAST indicate local (belongs to this host) and broadcast addresses, respectively. - For all routes, RTF_MULTICAST is set if the destination is multicast. The RTF_BROADCAST flag is used by ip_output() to eliminate a call to in_broadcast() in a common case; this gives about 1% in our packet-generation experiments. All three flags might be used (although they aren't now) to determine whether a packet can be forwarded; a given host route can represent a forwardable address if: (rt->rt_flags & (RTF_HOST | RTF_LOCAL | RTF_BROADCAST | RTF_MULTICAST)) == RTF_HOST Obviously, one still has to do all the work if a host route is not present, but this code allows one to cache the results of such a lookup if rtalloc1() is called without masking RTF_PRCLONING.
1996-05-06 17:42:13 +00:00
if (isbroadcast) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if ((ifp->if_flags & IFF_BROADCAST) == 0) {
error = EADDRNOTAVAIL;
goto bad;
}
if ((flags & IP_ALLOWBROADCAST) == 0) {
error = EACCES;
goto bad;
}
/* don't allow broadcast messages to be fragmented */
if ((u_short)ip->ip_len > ifp->if_mtu) {
error = EMSGSIZE;
goto bad;
}
m->m_flags |= M_BCAST;
Add three new route flags to help determine what sort of address the destination represents. For IP: - Iff it is a host route, RTF_LOCAL and RTF_BROADCAST indicate local (belongs to this host) and broadcast addresses, respectively. - For all routes, RTF_MULTICAST is set if the destination is multicast. The RTF_BROADCAST flag is used by ip_output() to eliminate a call to in_broadcast() in a common case; this gives about 1% in our packet-generation experiments. All three flags might be used (although they aren't now) to determine whether a packet can be forwarded; a given host route can represent a forwardable address if: (rt->rt_flags & (RTF_HOST | RTF_LOCAL | RTF_BROADCAST | RTF_MULTICAST)) == RTF_HOST Obviously, one still has to do all the work if a host route is not present, but this code allows one to cache the results of such a lookup if rtalloc1() is called without masking RTF_PRCLONING.
1996-05-06 17:42:13 +00:00
} else {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
m->m_flags &= ~M_BCAST;
Add three new route flags to help determine what sort of address the destination represents. For IP: - Iff it is a host route, RTF_LOCAL and RTF_BROADCAST indicate local (belongs to this host) and broadcast addresses, respectively. - For all routes, RTF_MULTICAST is set if the destination is multicast. The RTF_BROADCAST flag is used by ip_output() to eliminate a call to in_broadcast() in a common case; this gives about 1% in our packet-generation experiments. All three flags might be used (although they aren't now) to determine whether a packet can be forwarded; a given host route can represent a forwardable address if: (rt->rt_flags & (RTF_HOST | RTF_LOCAL | RTF_BROADCAST | RTF_MULTICAST)) == RTF_HOST Obviously, one still has to do all the work if a host route is not present, but this code allows one to cache the results of such a lookup if rtalloc1() is called without masking RTF_PRCLONING.
1996-05-06 17:42:13 +00:00
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
change IP Filter hooks to match new 3.1.8 patches for FreeBSD
1997-02-19 14:02:27 +00:00
sendit:
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
#ifdef IPSEC
/* get SP for this packet */
if (so == NULL)
sp = ipsec4_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, flags, &error);
else
sp = ipsec4_getpolicybysock(m, IPSEC_DIR_OUTBOUND, so, &error);
if (sp == NULL) {
ipsecstat.out_inval++;
goto bad;
}
error = 0;
/* check policy */
switch (sp->policy) {
case IPSEC_POLICY_DISCARD:
/*
* This packet is just discarded.
*/
ipsecstat.out_polvio++;
goto bad;
case IPSEC_POLICY_BYPASS:
case IPSEC_POLICY_NONE:
/* no need to do IPsec. */
goto skip_ipsec;
case IPSEC_POLICY_IPSEC:
if (sp->req == NULL) {
/* acquire a policy */
error = key_spdacquire(sp);
goto bad;
}
break;
case IPSEC_POLICY_ENTRUST:
default:
printf("ip_output: Invalid policy found. %d\n", sp->policy);
}
{
struct ipsec_output_state state;
bzero(&state, sizeof(state));
state.m = m;
if (flags & IP_ROUTETOIF) {
state.ro = &iproute;
bzero(&iproute, sizeof(iproute));
} else
state.ro = ro;
state.dst = (struct sockaddr *)dst;
ip->ip_sum = 0;
/*
* XXX
* delayed checksums are not currently compatible with IPsec
*/
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
in_delayed_cksum(m);
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
o Move NTOHL() and associated macros into <sys/param.h>. These are deprecated in favor of the POSIX-defined lowercase variants. o Change all occurrences of NTOHL() and associated marcros in the source tree to use the lowercase function variants. o Add missing license bits to sparc64's <machine/endian.h>. Approved by: jake o Clean up <machine/endian.h> files. o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>. o Remove prototypes for non-existent bswapXX() functions. o Include <machine/endian.h> in <arpa/inet.h> to define the POSIX-required ntohl() family of functions. o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>, and <sys/param.h>. o Prepend underscores to the ntohl() family to help deal with complexities associated with having MD (asm and inline) versions, and having to prevent exposure of these functions in other headers that happen to make use of endian-specific defines. o Create weak aliases to the canonical function name to help deal with third-party software forgetting to include an appropriate header. o Remove some now unneeded pollution from <sys/types.h>. o Add missing <arpa/inet.h> includes in userland. Tested on: alpha, i386 Reviewed by: bde, jake, tmm
2002-02-18 20:35:27 +00:00
ip->ip_len = htons(ip->ip_len);
ip->ip_off = htons(ip->ip_off);
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
error = ipsec4_output(&state, sp, flags);
m = state.m;
if (flags & IP_ROUTETOIF) {
/*
* if we have tunnel mode SA, we may need to ignore
* IP_ROUTETOIF.
*/
if (state.ro != &iproute || state.ro->ro_rt != NULL) {
flags &= ~IP_ROUTETOIF;
ro = state.ro;
}
} else
ro = state.ro;
dst = (struct sockaddr_in *)state.dst;
if (error) {
/* mbuf is already reclaimed in ipsec4_output. */
m0 = NULL;
switch (error) {
case EHOSTUNREACH:
case ENETUNREACH:
case EMSGSIZE:
case ENOBUFS:
case ENOMEM:
break;
default:
printf("ip4_output (ipsec): error code %d\n", error);
/*fall through*/
case ENOENT:
/* don't show these error codes to the user */
error = 0;
break;
}
goto bad;
}
}
/* be sure to update variables that are affected by ipsec4_output() */
ip = mtod(m, struct ip *);
#ifdef _IP_VHL
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
#else
hlen = ip->ip_hl << 2;
#endif
if (ro->ro_rt == NULL) {
if ((flags & IP_ROUTETOIF) == 0) {
printf("ip_output: "
"can't update route after IPsec processing\n");
error = EHOSTUNREACH; /*XXX*/
goto bad;
}
} else {
ia = ifatoia(ro->ro_rt->rt_ifa);
ifp = ro->ro_rt->rt_ifp;
}
/* make it flipped, again. */
o Move NTOHL() and associated macros into <sys/param.h>. These are deprecated in favor of the POSIX-defined lowercase variants. o Change all occurrences of NTOHL() and associated marcros in the source tree to use the lowercase function variants. o Add missing license bits to sparc64's <machine/endian.h>. Approved by: jake o Clean up <machine/endian.h> files. o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>. o Remove prototypes for non-existent bswapXX() functions. o Include <machine/endian.h> in <arpa/inet.h> to define the POSIX-required ntohl() family of functions. o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>, and <sys/param.h>. o Prepend underscores to the ntohl() family to help deal with complexities associated with having MD (asm and inline) versions, and having to prevent exposure of these functions in other headers that happen to make use of endian-specific defines. o Create weak aliases to the canonical function name to help deal with third-party software forgetting to include an appropriate header. o Remove some now unneeded pollution from <sys/types.h>. o Add missing <arpa/inet.h> includes in userland. Tested on: alpha, i386 Reviewed by: bde, jake, tmm
2002-02-18 20:35:27 +00:00
ip->ip_len = ntohs(ip->ip_len);
ip->ip_off = ntohs(ip->ip_off);
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
skip_ipsec:
#endif /*IPSEC*/
Add IP Filter hooks (from patches).
1997-02-10 11:45:37 +00:00
/*
Make this compile.. There are some unpleasing hacks in here. A major unifdef session is sorely tempting but would destroy any remaining chance of tracking the original sources.
1998-03-21 11:34:28 +00:00
* IpHack's section.
* - Xlate: translate packet's addr/port (NAT).
* - Firewall: deny/allow/etc.
* - Wrap: fake packet's addr/port <unimpl.>
* - Encapsulate: put it in another IP and send out. <unimp.>
*/
activate pfil_hooks and covert ipfilter to use it
2000-07-31 13:11:42 +00:00
#ifdef PFIL_HOOKS
/*
* Run through list of hooks for output packets.
*/
m1 = m;
pfh = pfil_hook_get(PFIL_OUT, &inetsw[ip_protox[IPPROTO_IP]].pr_pfh);
Mechanical change to use <sys/queue.h> macro API instead of fondling implementation details. Created with: sed(1) Reviewed by: md5(1)
2001-02-04 13:13:25 +00:00
for (; pfh; pfh = TAILQ_NEXT(pfh, pfil_link))
activate pfil_hooks and covert ipfilter to use it
2000-07-31 13:11:42 +00:00
if (pfh->pfil_func) {
rv = pfh->pfil_func(ip, hlen, ifp, 1, &m1);
if (rv) {
error = EHOSTUNREACH;
goto done;
}
m = m1;
if (m == NULL)
goto done;
ip = mtod(m, struct ip *);
}
#endif /* PFIL_HOOKS */
Add hooks for an IP NAT module, much like the firewall stuff... Move the sockopt definitions for the firewall code from ip_fw.h to in.h where it belongs.
1996-08-21 21:37:07 +00:00
Big sweep over the IPFIREWALL and IPACCT code. Close the ip-fragment hole. Waste less memory. Rewrite to contemporary more readable style. Kill separate IPACCT facility, use "accept" rules in IPFIREWALL. Filter incoming >and< outgoing packets. Replace "policy" by sticky "deny all" rule. Rules have numbers used for ordering and deletion. Remove "rerorder" code entirely. Count packet & bytecount matches for rules. Code in -current & -stable is now the same.
1996-02-23 15:47:58 +00:00
/*
* Check with the firewall...
Fix ipfw fwd so that it acts as the docs say when forwarding an incoming packet to another machine. Obtained from: Vicor Production tree MFC after: 3 weeks
2001-12-28 21:21:57 +00:00
* but not if we are already being fwd'd from a firewall.
Big sweep over the IPFIREWALL and IPACCT code. Close the ip-fragment hole. Waste less memory. Rewrite to contemporary more readable style. Kill separate IPACCT facility, use "accept" rules in IPFIREWALL. Filter incoming >and< outgoing packets. Replace "policy" by sticky "deny all" rule. Rules have numbers used for ordering and deletion. Remove "rerorder" code entirely. Count packet & bytecount matches for rules. Code in -current & -stable is now the same.
1996-02-23 15:47:58 +00:00
*/
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
if (fw_enable && IPFW_LOADED && !args.next_hop) {
Fix a compile error if IPFIREWALL_FORWARD active without IPDIVERT.
1998-08-01 08:44:33 +00:00
struct sockaddr_in *old = dst;
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
args.m = m;
args.next_hop = dst;
args.oif = ifp;
off = ip_fw_chk_ptr(&args);
m = args.m;
dst = args.next_hop;
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
/*
fix bad indentation and whitespace resulting from cut&paste
2002-06-23 09:15:43 +00:00
* On return we must do the following:
* m == NULL -> drop the pkt (old interface, deprecated)
* (off & IP_FW_PORT_DENY_FLAG) -> drop the pkt (new interface)
* 1<=off<= 0xffff -> DIVERT
* (off & IP_FW_PORT_DYNT_FLAG) -> send to a DUMMYNET pipe
* (off & IP_FW_PORT_TEE_FLAG) -> TEE the packet
* dst != old -> IPFIREWALL_FORWARD
* off==0, dst==old -> accept
* If some of the above modules are not compiled in, then
* we should't have to check the corresponding condition
* (because the ipfw control socket should not accept
* unsupported rules), but better play safe and drop
* packets in case of doubt.
*/
Cleanup the interface to ip_fw_chk, two of the input arguments were totally useless and have been removed. ip_input.c, ip_output.c: Properly initialize the "ip" pointer in case the firewall does an m_pullup() on the packet. Remove some debugging code forgotten long ago. ip_fw.[ch], bridge.c: Prepare the grounds for matching MAC header fields in bridged packets, so we can have 'etherfw' functionality without a lot of kernel and userland bloat.
2002-05-09 10:34:57 +00:00
if ( (off & IP_FW_PORT_DENY_FLAG) || m == NULL) {
whitespace and style fixes recovered from -stable.
2001-12-14 19:34:11 +00:00
if (m)
m_freem(m);
error = EACCES;
goto done;
MFS: bridge/ipfw/dummynet fixes (bridge.c will be committed separately)
2001-02-02 00:18:00 +00:00
}
Cleanup the interface to ip_fw_chk, two of the input arguments were totally useless and have been removed. ip_input.c, ip_output.c: Properly initialize the "ip" pointer in case the firewall does an m_pullup() on the packet. Remove some debugging code forgotten long ago. ip_fw.[ch], bridge.c: Prepare the grounds for matching MAC header fields in bridged packets, so we can have 'etherfw' functionality without a lot of kernel and userland bloat.
2002-05-09 10:34:57 +00:00
ip = mtod(m, struct ip *);
whitespace and style fixes recovered from -stable.
2001-12-14 19:34:11 +00:00
if (off == 0 && dst == old) /* common case */
goto pass;
MFS: sync the ipfw/dummynet/bridge code with the one recently merged into stable (mostly , but not only, formatting and comments changes).
2001-11-04 22:56:25 +00:00
if (DUMMYNET_LOADED && (off & IP_FW_PORT_DYNT_FLAG) != 0) {
whitespace and style fixes recovered from -stable.
2001-12-14 19:34:11 +00:00
/*
* pass the pkt to dummynet. Need to include
* pipe number, m, ifp, ro, dst because these are
* not recomputed in the next pass.
* All other parameters have been already used and
* so they are not needed anymore.
* XXX note: if the ifp or ro entry are deleted
* while a pkt is in dummynet, we are in trouble!
*/
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
args.ro = ro;
args.dst = dst;
args.flags = flags;
error = ip_dn_io_ptr(m, off & 0xffff, DN_TO_IP_OUT,
&args);
whitespace and style fixes recovered from -stable.
2001-12-14 19:34:11 +00:00
goto done;
Submitted by: Whistle Communications (archie Cobbs) these are quite extensive additions to the ipfw code. they include a change to the API because the old method was broken, but the user view is kept the same. The new code allows a particular match to skip forward to a particular line number, so that blocks of rules can be used without checking all the intervening rules. There are also many more ways of rejecting connections especially TCP related, and many many more ... see the man page for a complete description.
1997-06-02 05:02:37 +00:00
}
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
#ifdef IPDIVERT
Miscellaneous fixes/cleanups relating to ipfw and divert(4): - Implement 'ipfw tee' (finally) - Divert packets by calling new function divert_packet() directly instead of going through protosw[]. - Replace kludgey global variable 'ip_divert_port' with a function parameter to divert_packet() - Replace kludgey global variable 'frag_divert_port' with a function parameter to ip_reass() - style(9) fixes Reviewed by: julian, green
1999-12-06 00:43:07 +00:00
if (off != 0 && (off & IP_FW_PORT_DYNT_FLAG) == 0) {
struct mbuf *clone = NULL;
/* Clone packet if we're doing a 'tee' */
if ((off & IP_FW_PORT_TEE_FLAG) != 0)
clone = m_dup(m, M_DONTWAIT);
Calculate any delayed checksums before handing an mbuf off to a divert socket. This fixes a problem with ppp/natd. Reviewed by: bsd (Brian Dean, gotta love that login name)
2000-04-01 18:51:03 +00:00
/*
* XXX
* delayed checksums are not currently compatible
* with divert sockets.
*/
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
in_delayed_cksum(m);
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
Miscellaneous fixes/cleanups relating to ipfw and divert(4): - Implement 'ipfw tee' (finally) - Divert packets by calling new function divert_packet() directly instead of going through protosw[]. - Replace kludgey global variable 'ip_divert_port' with a function parameter to divert_packet() - Replace kludgey global variable 'frag_divert_port' with a function parameter to ip_reass() - style(9) fixes Reviewed by: julian, green
1999-12-06 00:43:07 +00:00
/* Restore packet header fields to original values */
o Move NTOHL() and associated macros into <sys/param.h>. These are deprecated in favor of the POSIX-defined lowercase variants. o Change all occurrences of NTOHL() and associated marcros in the source tree to use the lowercase function variants. o Add missing license bits to sparc64's <machine/endian.h>. Approved by: jake o Clean up <machine/endian.h> files. o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>. o Remove prototypes for non-existent bswapXX() functions. o Include <machine/endian.h> in <arpa/inet.h> to define the POSIX-required ntohl() family of functions. o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>, and <sys/param.h>. o Prepend underscores to the ntohl() family to help deal with complexities associated with having MD (asm and inline) versions, and having to prevent exposure of these functions in other headers that happen to make use of endian-specific defines. o Create weak aliases to the canonical function name to help deal with third-party software forgetting to include an appropriate header. o Remove some now unneeded pollution from <sys/types.h>. o Add missing <arpa/inet.h> includes in userland. Tested on: alpha, i386 Reviewed by: bde, jake, tmm
2002-02-18 20:35:27 +00:00
ip->ip_len = htons(ip->ip_len);
ip->ip_off = htons(ip->ip_off);
Miscellaneous fixes/cleanups relating to ipfw and divert(4): - Implement 'ipfw tee' (finally) - Divert packets by calling new function divert_packet() directly instead of going through protosw[]. - Replace kludgey global variable 'ip_divert_port' with a function parameter to divert_packet() - Replace kludgey global variable 'frag_divert_port' with a function parameter to ip_reass() - style(9) fixes Reviewed by: julian, green
1999-12-06 00:43:07 +00:00
/* Deliver packet to divert input routine */
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
divert_packet(m, 0, off & 0xffff, args.divert_rule);
Miscellaneous fixes/cleanups relating to ipfw and divert(4): - Implement 'ipfw tee' (finally) - Divert packets by calling new function divert_packet() directly instead of going through protosw[]. - Replace kludgey global variable 'ip_divert_port' with a function parameter to divert_packet() - Replace kludgey global variable 'frag_divert_port' with a function parameter to ip_reass() - style(9) fixes Reviewed by: julian, green
1999-12-06 00:43:07 +00:00
/* If 'tee', continue with original packet */
if (clone != NULL) {
m = clone;
ip = mtod(m, struct ip *);
goto pass;
}
Submitted by: Whistle Communications (archie Cobbs) these are quite extensive additions to the ipfw code. they include a change to the API because the old method was broken, but the user view is kept the same. The new code allows a particular match to skip forward to a particular line number, so that blocks of rules can be used without checking all the intervening rules. There are also many more ways of rejecting connections especially TCP related, and many many more ... see the man page for a complete description.
1997-06-02 05:02:37 +00:00
goto done;
Adding changes to ipfw and the kernel to support ip packet diversion.. This stuff should not be too destructive if the IPDIVERT is not compiled in.. be aware that this changes the size of the ip_fw struct so ipfw needs to be recompiled to use it.. more changes coming to clean this up.
1996-07-10 19:44:30 +00:00
}
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
#endif
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
/* IPFIREWALL_FORWARD */
/*
* Check dst to make sure it is directly reachable on the
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
* interface we previously thought it was.
* If it isn't (which may be likely in some situations) we have
* to re-route it (ie, find a route for the next-hop and the
* associated interface) and set them here. This is nested
* forwarding which in most cases is undesirable, except where
* such control is nigh impossible. So we do it here.
* And I'm babbling.
*/
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
if (off == 0 && old != dst) { /* FORWARD, dst has changed */
#if 0
/*
* XXX To improve readability, this block should be
* changed into a function call as below:
*/
error = ip_ipforward(&m, &dst, &ifp);
if (error)
goto bad;
if (m == NULL) /* ip_input consumed the mbuf */
goto done;
#else
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
struct in_ifaddr *ia;
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
/*
* XXX sro_fwd below is static, and a pointer
* to it gets passed to routines downstream.
* This could have surprisingly bad results in
* practice, because its content is overwritten
* by subsequent packets.
*/
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
/* There must be a better way to do this next line... */
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
static struct route sro_fwd;
struct route *ro_fwd = &sro_fwd;
#if 0
print_ip("IPFIREWALL_FORWARD: New dst ip: ",
dst->sin_addr, "\n");
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
#endif
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
/*
* We need to figure out if we have been forwarded
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
* to a local socket. If so, then we should somehow
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
* "loop back" to ip_input, and get directed to the
* PCB as if we had received this packet. This is
* because it may be dificult to identify the packets
* you want to forward until they are being output
* and have selected an interface. (e.g. locally
* initiated packets) If we used the loopback inteface,
* we would not be able to control what happens
* as the packet runs through ip_input() as
* it is done through a ISR.
*/
Add a hash table that contains the list of internet addresses, and use this in place of the in_ifaddr list when appropriate. This improves performance on hosts which have a large number of IP aliases.
2001-09-29 04:34:11 +00:00
LIST_FOREACH(ia,
INADDR_HASH(dst->sin_addr.s_addr), ia_hash) {
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
/*
* If the addr to forward to is one
* of ours, we pretend to
* be the destination for this packet.
*/
if (IA_SIN(ia)->sin_addr.s_addr ==
dst->sin_addr.s_addr)
break;
}
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
if (ia) { /* tell ip_input "dont filter" */
struct m_hdr tag;
tag.mh_type = MT_TAG;
tag.mh_flags = PACKET_TAG_IPFORWARD;
tag.mh_data = (caddr_t)args.next_hop;
tag.mh_next = m;
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
if (m->m_pkthdr.rcvif == NULL)
m->m_pkthdr.rcvif = ifunit("lo0");
If `ipfw fwd' loops an mbuf back to ip_input from ip_output and the mbuf is marked for delayed checksums, then additionally mark the packet as having it's checksums computed. This allows us to bypass computing/checking the checksum entirely, which isn't really needeed as the packet has never hit the wire. Reviewed by: green
2000-03-30 02:16:40 +00:00
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
m->m_pkthdr.csum_flags |=
CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
m0->m_pkthdr.csum_data = 0xffff;
}
m->m_pkthdr.csum_flags |=
CSUM_IP_CHECKED | CSUM_IP_VALID;
o Move NTOHL() and associated macros into <sys/param.h>. These are deprecated in favor of the POSIX-defined lowercase variants. o Change all occurrences of NTOHL() and associated marcros in the source tree to use the lowercase function variants. o Add missing license bits to sparc64's <machine/endian.h>. Approved by: jake o Clean up <machine/endian.h> files. o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>. o Remove prototypes for non-existent bswapXX() functions. o Include <machine/endian.h> in <arpa/inet.h> to define the POSIX-required ntohl() family of functions. o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>, and <sys/param.h>. o Prepend underscores to the ntohl() family to help deal with complexities associated with having MD (asm and inline) versions, and having to prevent exposure of these functions in other headers that happen to make use of endian-specific defines. o Create weak aliases to the canonical function name to help deal with third-party software forgetting to include an appropriate header. o Remove some now unneeded pollution from <sys/types.h>. o Add missing <arpa/inet.h> includes in userland. Tested on: alpha, i386 Reviewed by: bde, jake, tmm
2002-02-18 20:35:27 +00:00
ip->ip_len = htons(ip->ip_len);
ip->ip_off = htons(ip->ip_off);
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
ip_input((struct mbuf *)&tag);
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
goto done;
}
/* Some of the logic for this was
* nicked from above.
*
* This rewrites the cached route in a local PCB.
* Is this what we want to do?
*/
bcopy(dst, &ro_fwd->ro_dst, sizeof(*dst));
ro_fwd->ro_rt = 0;
rtalloc_ign(ro_fwd, RTF_PRCLONING);
if (ro_fwd->ro_rt == 0) {
ipstat.ips_noroute++;
error = EHOSTUNREACH;
goto bad;
}
ia = ifatoia(ro_fwd->ro_rt->rt_ifa);
ifp = ro_fwd->ro_rt->rt_ifp;
ro_fwd->ro_rt->rt_use++;
if (ro_fwd->ro_rt->rt_flags & RTF_GATEWAY)
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
dst = (struct sockaddr_in *)
ro_fwd->ro_rt->rt_gateway;
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
if (ro_fwd->ro_rt->rt_flags & RTF_HOST)
isbroadcast =
(ro_fwd->ro_rt->rt_flags & RTF_BROADCAST);
else
isbroadcast = in_broadcast(dst->sin_addr, ifp);
Don't try to free a NULL route when doing IPFIREWALL_FORWARD. An old route will be NULL at that point if a packet were initially routed to an interface (using the IP_ROUTETOIF flag.) Submitted by: Igor Timkin <ivt@gamma.ru>
2001-12-19 14:54:13 +00:00
if (ro->ro_rt)
RTFREE(ro->ro_rt);
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
ro->ro_rt = ro_fwd->ro_rt;
dst = (struct sockaddr_in *)&ro_fwd->ro_dst;
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
#endif /* ... block to be put into a function */
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
/*
* If we added a default src ip earlier,
* which would have been gotten from the-then
* interface, do it again, from the new one.
*/
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
if (src_was_INADDR_ANY)
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
ip->ip_src = IA_SIN(ia)->sin_addr;
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
goto pass ;
Support for IPFW based transparent forwarding. Any packet that can be matched by a ipfw rule can be redirected transparently to another port or machine. Redirection to another port mostly makes sense with tcp, where a session can be set up between a proxy and an unsuspecting client. Redirection to another machine requires that the other machine also be expecting to receive the forwarded packets, as their headers will not have been modified. /sbin/ipfw must be recompiled!!! Reviewed by: Peter Wemm <peter@freebsd.org> Submitted by: Chrisy Luke <chrisy@flix.net>
1998-07-06 03:20:19 +00:00
}
Remove (almost all) global variables that were used to hold packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days
2002-06-22 11:51:02 +00:00
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
/*
* if we get here, none of the above matches, and
* we have to drop the pkt
*/
m_freem(m);
error = EACCES; /* not sure this is the right error msg */
goto done;
Adding changes to ipfw and the kernel to support ip packet diversion.. This stuff should not be too destructive if the IPDIVERT is not compiled in.. be aware that this changes the size of the ip_fw struct so ipfw needs to be recompiled to use it.. more changes coming to clean this up.
1996-07-10 19:44:30 +00:00
}
Big sweep over the IPFIREWALL and IPACCT code. Close the ip-fragment hole. Waste less memory. Rewrite to contemporary more readable style. Kill separate IPACCT facility, use "accept" rules in IPFIREWALL. Filter incoming >and< outgoing packets. Replace "policy" by sticky "deny all" rule. Rules have numbers used for ordering and deletion. Remove "rerorder" code entirely. Count packet & bytecount matches for rules. Code in -current & -stable is now the same.
1996-02-23 15:47:58 +00:00
Last bits (i think) of dummynet for -current.
1998-12-14 18:09:13 +00:00
pass:
Moved the 127/8 check below so that IPF redirects have a chance of working. MFC after: 1 day
2002-02-15 12:19:03 +00:00
/* 127/8 must not appear on wire - RFC1122. */
if ((ntohl(ip->ip_dst.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET ||
(ntohl(ip->ip_src.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) {
if ((ifp->if_flags & IFF_LOOPBACK) == 0) {
ipstat.ips_badaddr++;
error = EADDRNOTAVAIL;
goto bad;
}
}
RFC768 (UDP) requires that "if the computed checksum is zero, it is transmitted as all ones". This got broken after introduction of delayed checksums as follows. Some guys (including Jonathan) think that it is allowed to transmit all ones in place of a zero checksum for TCP the same way as for UDP. (The discussion still takes place on -net.) Thus, the 0 -> 0xffff checksum fixup was first moved from udp_output() (see udp_usrreq.c, 1.64 -> 1.65) to in_cksum_skip() (see sys/i386/i386/in_cksum.c, 1.17 -> 1.18, INVERT expression). Besides that I disagree that it is valid for TCP, there was no real problem until in_cksum.c,v 1.20, where the in_cksum() was made just a special version of in_cksum_skip(). The side effect was that now every incoming IP datagram failed to pass the checksum test (in_cksum() returned 0xffff when it should actually return zero). It was fixed next day in revision 1.21, by removing the INVERT expression. The latter also broke the 0 -> 0xffff fixup for UDP checksums. Before this change: : tcpdump: listening on lo0 : 127.0.0.1.33005 > 127.0.0.1.33006: udp 0 (ttl 64, id 1) : 4500 001c 0001 0000 4011 7cce 7f00 0001 : 7f00 0001 80ed 80ee 0008 0000 After this change: : tcpdump: listening on lo0 : 127.0.0.1.33005 > 127.0.0.1.33006: udp 0 (ttl 64, id 1) : 4500 001c 0001 0000 4011 7cce 7f00 0001 : 7f00 0001 80ed 80ee 0008 ffff
2001-03-13 17:07:06 +00:00
m->m_pkthdr.csum_flags |= CSUM_IP;
sw_csum = m->m_pkthdr.csum_flags & ~ifp->if_hwassist;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
if (sw_csum & CSUM_DELAY_DATA) {
in_delayed_cksum(m);
sw_csum &= ~CSUM_DELAY_DATA;
}
RFC768 (UDP) requires that "if the computed checksum is zero, it is transmitted as all ones". This got broken after introduction of delayed checksums as follows. Some guys (including Jonathan) think that it is allowed to transmit all ones in place of a zero checksum for TCP the same way as for UDP. (The discussion still takes place on -net.) Thus, the 0 -> 0xffff checksum fixup was first moved from udp_output() (see udp_usrreq.c, 1.64 -> 1.65) to in_cksum_skip() (see sys/i386/i386/in_cksum.c, 1.17 -> 1.18, INVERT expression). Besides that I disagree that it is valid for TCP, there was no real problem until in_cksum.c,v 1.20, where the in_cksum() was made just a special version of in_cksum_skip(). The side effect was that now every incoming IP datagram failed to pass the checksum test (in_cksum() returned 0xffff when it should actually return zero). It was fixed next day in revision 1.21, by removing the INVERT expression. The latter also broke the 0 -> 0xffff fixup for UDP checksums. Before this change: : tcpdump: listening on lo0 : 127.0.0.1.33005 > 127.0.0.1.33006: udp 0 (ttl 64, id 1) : 4500 001c 0001 0000 4011 7cce 7f00 0001 : 7f00 0001 80ed 80ee 0008 0000 After this change: : tcpdump: listening on lo0 : 127.0.0.1.33005 > 127.0.0.1.33006: udp 0 (ttl 64, id 1) : 4500 001c 0001 0000 4011 7cce 7f00 0001 : 7f00 0001 80ed 80ee 0008 ffff
2001-03-13 17:07:06 +00:00
m->m_pkthdr.csum_flags &= ifp->if_hwassist;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
* If small enough for interface, or the interface will take
* care of the fragmentation for us, can just send directly.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
if ((u_short)ip->ip_len <= ifp->if_mtu ||
ifp->if_hwassist & CSUM_FRAGMENT) {
o Move NTOHL() and associated macros into <sys/param.h>. These are deprecated in favor of the POSIX-defined lowercase variants. o Change all occurrences of NTOHL() and associated marcros in the source tree to use the lowercase function variants. o Add missing license bits to sparc64's <machine/endian.h>. Approved by: jake o Clean up <machine/endian.h> files. o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>. o Remove prototypes for non-existent bswapXX() functions. o Include <machine/endian.h> in <arpa/inet.h> to define the POSIX-required ntohl() family of functions. o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>, and <sys/param.h>. o Prepend underscores to the ntohl() family to help deal with complexities associated with having MD (asm and inline) versions, and having to prevent exposure of these functions in other headers that happen to make use of endian-specific defines. o Create weak aliases to the canonical function name to help deal with third-party software forgetting to include an appropriate header. o Remove some now unneeded pollution from <sys/types.h>. o Add missing <arpa/inet.h> includes in userland. Tested on: alpha, i386 Reviewed by: bde, jake, tmm
2002-02-18 20:35:27 +00:00
ip->ip_len = htons(ip->ip_len);
ip->ip_off = htons(ip->ip_off);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ip->ip_sum = 0;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
if (sw_csum & CSUM_DELAY_IP) {
if (ip->ip_vhl == IP_VHL_BORING) {
ip->ip_sum = in_cksum_hdr(ip);
} else {
ip->ip_sum = in_cksum(m, hlen);
}
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
}
Augment the 'ifaddr' structure with a 'struct if_data' to keep statistics on a per network address basis. Teach the IPv4 and IPv6 input/output routines to log packets/bytes against the network address connected to the flow. Teach netstat to display the per-address stats for IP protocols when 'netstat -i' is evoked, instead of displaying the per-interface stats.
2000-10-19 23:15:54 +00:00
/* Record statistics for this interface address. */
Avoid a NULL pointer derefence introduced in rev. 1.129. Problem noticed by: bde, gcc(1) Panic caught by: mjacob Patch tested by: mjacob
2001-07-23 16:50:01 +00:00
if (!(flags & IP_FORWARDING) && ia) {
Augment the 'ifaddr' structure with a 'struct if_data' to keep statistics on a per network address basis. Teach the IPv4 and IPv6 input/output routines to log packets/bytes against the network address connected to the flow. Teach netstat to display the per-address stats for IP protocols when 'netstat -i' is evoked, instead of displaying the per-interface stats.
2000-10-19 23:15:54 +00:00
ia->ia_ifa.if_opackets++;
ia->ia_ifa.if_obytes += m->m_pkthdr.len;
}
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
#ifdef IPSEC
/* clean ipsec history once it goes out of the node */
ipsec_delaux(m);
#endif
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
error = (*ifp->if_output)(ifp, m,
(struct sockaddr *)dst, ro->ro_rt);
goto done;
}
/*
* Too large for interface; fragment if possible.
* Must be able to put at least 8 bytes per fragment.
*/
if (ip->ip_off & IP_DF) {
error = EMSGSIZE;
The ability to administratively change the MTU of an interface presents a few new wrinkles for MTU discovery which tcp_output() had better be prepared to handle. ip_output() is also modified to do something helpful in this case, since it has already calculated the information we need.
1995-10-16 18:21:26 +00:00
/*
* This case can happen if the user changed the MTU
* of an interface after enabling IP on it. Because
* most netifs don't keep track of routes pointing to
* them, there is no way for one to update all its
* routes when the MTU is changed.
*/
if ((ro->ro_rt->rt_flags & (RTF_UP | RTF_HOST))
&& !(ro->ro_rt->rt_rmx.rmx_locks & RTV_MTU)
&& (ro->ro_rt->rt_rmx.rmx_mtu > ifp->if_mtu)) {
ro->ro_rt->rt_rmx.rmx_mtu = ifp->if_mtu;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ipstat.ips_cantfrag++;
goto bad;
}
len = (ifp->if_mtu - hlen) &~ 7;
if (len < 8) {
error = EMSGSIZE;
goto bad;
}
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
/*
* if the interface will not calculate checksums on
* fragmented packets, then do it here.
*/
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA &&
(ifp->if_hwassist & CSUM_IP_FRAGS) == 0) {
in_delayed_cksum(m);
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
At long last, commit the zero copy sockets code. MAKEDEV: Add MAKEDEV glue for the ti(4) device nodes. ti.4: Update the ti(4) man page to include information on the TI_JUMBO_HDRSPLIT and TI_PRIVATE_JUMBOS kernel options, and also include information about the new character device interface and the associated ioctls. man9/Makefile: Add jumbo.9 and zero_copy.9 man pages and associated links. jumbo.9: New man page describing the jumbo buffer allocator interface and operation. zero_copy.9: New man page describing the general characteristics of the zero copy send and receive code, and what an application author should do to take advantage of the zero copy functionality. NOTES: Add entries for ZERO_COPY_SOCKETS, TI_PRIVATE_JUMBOS, TI_JUMBO_HDRSPLIT, MSIZE, and MCLSHIFT. conf/files: Add uipc_jumbo.c and uipc_cow.c. conf/options: Add the 5 options mentioned above. kern_subr.c: Receive side zero copy implementation. This takes "disposable" pages attached to an mbuf, gives them to a user process, and then recycles the user's page. This is only active when ZERO_COPY_SOCKETS is turned on and the kern.ipc.zero_copy.receive sysctl variable is set to 1. uipc_cow.c: Send side zero copy functions. Takes a page written by the user and maps it copy on write and assigns it kernel virtual address space. Removes copy on write mapping once the buffer has been freed by the network stack. uipc_jumbo.c: Jumbo disposable page allocator code. This allocates (optionally) disposable pages for network drivers that want to give the user the option of doing zero copy receive. uipc_socket.c: Add kern.ipc.zero_copy.{send,receive} sysctls that are enabled if ZERO_COPY_SOCKETS is turned on. Add zero copy send support to sosend() -- pages get mapped into the kernel instead of getting copied if they meet size and alignment restrictions. uipc_syscalls.c:Un-staticize some of the sf* functions so that they can be used elsewhere. (uipc_cow.c) if_media.c: In the SIOCGIFMEDIA ioctl in ifmedia_ioctl(), avoid calling malloc() with M_WAITOK. Return an error if the M_NOWAIT malloc fails. The ti(4) driver and the wi(4) driver, at least, call this with a mutex held. This causes witness warnings for 'ifconfig -a' with a wi(4) or ti(4) board in the system. (I've only verified for ti(4)). ip_output.c: Fragment large datagrams so that each segment contains a multiple of PAGE_SIZE amount of data plus headers. This allows the receiver to potentially do page flipping on receives. if_ti.c: Add zero copy receive support to the ti(4) driver. If TI_PRIVATE_JUMBOS is not defined, it now uses the jumbo(9) buffer allocator for jumbo receive buffers. Add a new character device interface for the ti(4) driver for the new debugging interface. This allows (a patched version of) gdb to talk to the Tigon board and debug the firmware. There are also a few additional debugging ioctls available through this interface. Add header splitting support to the ti(4) driver. Tweak some of the default interrupt coalescing parameters to more useful defaults. Add hooks for supporting transmit flow control, but leave it turned off with a comment describing why it is turned off. if_tireg.h: Change the firmware rev to 12.4.11, since we're really at 12.4.11 plus fixes from 12.4.13. Add defines needed for debugging. Remove the ti_stats structure, it is now defined in sys/tiio.h. ti_fw.h: 12.4.11 firmware. ti_fw2.h: 12.4.11 firmware, plus selected fixes from 12.4.13, and my header splitting patches. Revision 12.4.13 doesn't handle 10/100 negotiation properly. (This firmware is the same as what was in the tree previously, with the addition of header splitting support.) sys/jumbo.h: Jumbo buffer allocator interface. sys/mbuf.h: Add a new external mbuf type, EXT_DISPOSABLE, to indicate that the payload buffer can be thrown away / flipped to a userland process. socketvar.h: Add prototype for socow_setup. tiio.h: ioctl interface to the character portion of the ti(4) driver, plus associated structure/type definitions. uio.h: Change prototype for uiomoveco() so that we'll know whether the source page is disposable. ufs_readwrite.c:Update for new prototype of uiomoveco(). vm_fault.c: In vm_fault(), check to see whether we need to do a page based copy on write fault. vm_object.c: Add a new function, vm_object_allocate_wait(). This does the same thing that vm_object allocate does, except that it gives the caller the opportunity to specify whether it should wait on the uma_zalloc() of the object structre. This allows vm objects to be allocated while holding a mutex. (Without generating WITNESS warnings.) vm_object_allocate() is implemented as a call to vm_object_allocate_wait() with the malloc flag set to M_WAITOK. vm_object.h: Add prototype for vm_object_allocate_wait(). vm_page.c: Add page-based copy on write setup, clear and fault routines. vm_page.h: Add page based COW function prototypes and variable in the vm_page structure. Many thanks to Drew Gallatin, who wrote the zero copy send and receive code, and to all the other folks who have tested and reviewed this code over the years.
2002-06-26 03:37:47 +00:00
if (len > PAGE_SIZE) {
/*
* Fragement large datagrams such that each segment
* contains a multiple of PAGE_SIZE amount of data,
* plus headers. This enables a receiver to perform
* page-flipping zero-copy optimizations.
*/
int newlen;
struct mbuf *mtmp;
for (mtmp = m, off = 0;
mtmp && ((off + mtmp->m_len) <= ifp->if_mtu);
mtmp = mtmp->m_next) {
off += mtmp->m_len;
}
/*
* firstlen (off - hlen) must be aligned on an
* 8-byte boundary
*/
if (off < hlen)
goto smart_frag_failure;
off = ((off - hlen) & ~7) + hlen;
newlen = (~PAGE_MASK) & ifp->if_mtu;
if ((newlen + sizeof (struct ip)) > ifp->if_mtu) {
/* we failed, go back the default */
smart_frag_failure:
newlen = len;
off = hlen + len;
}
/* printf("ipfrag: len = %d, hlen = %d, mhlen = %d, newlen = %d, off = %d\n",
len, hlen, sizeof (struct ip), newlen, off);*/
len = newlen;
} else {
off = hlen + len;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
At long last, commit the zero copy sockets code. MAKEDEV: Add MAKEDEV glue for the ti(4) device nodes. ti.4: Update the ti(4) man page to include information on the TI_JUMBO_HDRSPLIT and TI_PRIVATE_JUMBOS kernel options, and also include information about the new character device interface and the associated ioctls. man9/Makefile: Add jumbo.9 and zero_copy.9 man pages and associated links. jumbo.9: New man page describing the jumbo buffer allocator interface and operation. zero_copy.9: New man page describing the general characteristics of the zero copy send and receive code, and what an application author should do to take advantage of the zero copy functionality. NOTES: Add entries for ZERO_COPY_SOCKETS, TI_PRIVATE_JUMBOS, TI_JUMBO_HDRSPLIT, MSIZE, and MCLSHIFT. conf/files: Add uipc_jumbo.c and uipc_cow.c. conf/options: Add the 5 options mentioned above. kern_subr.c: Receive side zero copy implementation. This takes "disposable" pages attached to an mbuf, gives them to a user process, and then recycles the user's page. This is only active when ZERO_COPY_SOCKETS is turned on and the kern.ipc.zero_copy.receive sysctl variable is set to 1. uipc_cow.c: Send side zero copy functions. Takes a page written by the user and maps it copy on write and assigns it kernel virtual address space. Removes copy on write mapping once the buffer has been freed by the network stack. uipc_jumbo.c: Jumbo disposable page allocator code. This allocates (optionally) disposable pages for network drivers that want to give the user the option of doing zero copy receive. uipc_socket.c: Add kern.ipc.zero_copy.{send,receive} sysctls that are enabled if ZERO_COPY_SOCKETS is turned on. Add zero copy send support to sosend() -- pages get mapped into the kernel instead of getting copied if they meet size and alignment restrictions. uipc_syscalls.c:Un-staticize some of the sf* functions so that they can be used elsewhere. (uipc_cow.c) if_media.c: In the SIOCGIFMEDIA ioctl in ifmedia_ioctl(), avoid calling malloc() with M_WAITOK. Return an error if the M_NOWAIT malloc fails. The ti(4) driver and the wi(4) driver, at least, call this with a mutex held. This causes witness warnings for 'ifconfig -a' with a wi(4) or ti(4) board in the system. (I've only verified for ti(4)). ip_output.c: Fragment large datagrams so that each segment contains a multiple of PAGE_SIZE amount of data plus headers. This allows the receiver to potentially do page flipping on receives. if_ti.c: Add zero copy receive support to the ti(4) driver. If TI_PRIVATE_JUMBOS is not defined, it now uses the jumbo(9) buffer allocator for jumbo receive buffers. Add a new character device interface for the ti(4) driver for the new debugging interface. This allows (a patched version of) gdb to talk to the Tigon board and debug the firmware. There are also a few additional debugging ioctls available through this interface. Add header splitting support to the ti(4) driver. Tweak some of the default interrupt coalescing parameters to more useful defaults. Add hooks for supporting transmit flow control, but leave it turned off with a comment describing why it is turned off. if_tireg.h: Change the firmware rev to 12.4.11, since we're really at 12.4.11 plus fixes from 12.4.13. Add defines needed for debugging. Remove the ti_stats structure, it is now defined in sys/tiio.h. ti_fw.h: 12.4.11 firmware. ti_fw2.h: 12.4.11 firmware, plus selected fixes from 12.4.13, and my header splitting patches. Revision 12.4.13 doesn't handle 10/100 negotiation properly. (This firmware is the same as what was in the tree previously, with the addition of header splitting support.) sys/jumbo.h: Jumbo buffer allocator interface. sys/mbuf.h: Add a new external mbuf type, EXT_DISPOSABLE, to indicate that the payload buffer can be thrown away / flipped to a userland process. socketvar.h: Add prototype for socow_setup. tiio.h: ioctl interface to the character portion of the ti(4) driver, plus associated structure/type definitions. uio.h: Change prototype for uiomoveco() so that we'll know whether the source page is disposable. ufs_readwrite.c:Update for new prototype of uiomoveco(). vm_fault.c: In vm_fault(), check to see whether we need to do a page based copy on write fault. vm_object.c: Add a new function, vm_object_allocate_wait(). This does the same thing that vm_object allocate does, except that it gives the caller the opportunity to specify whether it should wait on the uma_zalloc() of the object structre. This allows vm objects to be allocated while holding a mutex. (Without generating WITNESS warnings.) vm_object_allocate() is implemented as a call to vm_object_allocate_wait() with the malloc flag set to M_WAITOK. vm_object.h: Add prototype for vm_object_allocate_wait(). vm_page.c: Add page-based copy on write setup, clear and fault routines. vm_page.h: Add page based COW function prototypes and variable in the vm_page structure. Many thanks to Drew Gallatin, who wrote the zero copy send and receive code, and to all the other folks who have tested and reviewed this code over the years.
2002-06-26 03:37:47 +00:00
int mhlen, firstlen = off - hlen;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct mbuf **mnext = &m->m_nextpkt;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
int nfrags = 1;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Loop through length of segment after first fragment,
* make new header and copy data of each part and link onto chain.
*/
m0 = m;
mhlen = sizeof (struct ip);
At long last, commit the zero copy sockets code. MAKEDEV: Add MAKEDEV glue for the ti(4) device nodes. ti.4: Update the ti(4) man page to include information on the TI_JUMBO_HDRSPLIT and TI_PRIVATE_JUMBOS kernel options, and also include information about the new character device interface and the associated ioctls. man9/Makefile: Add jumbo.9 and zero_copy.9 man pages and associated links. jumbo.9: New man page describing the jumbo buffer allocator interface and operation. zero_copy.9: New man page describing the general characteristics of the zero copy send and receive code, and what an application author should do to take advantage of the zero copy functionality. NOTES: Add entries for ZERO_COPY_SOCKETS, TI_PRIVATE_JUMBOS, TI_JUMBO_HDRSPLIT, MSIZE, and MCLSHIFT. conf/files: Add uipc_jumbo.c and uipc_cow.c. conf/options: Add the 5 options mentioned above. kern_subr.c: Receive side zero copy implementation. This takes "disposable" pages attached to an mbuf, gives them to a user process, and then recycles the user's page. This is only active when ZERO_COPY_SOCKETS is turned on and the kern.ipc.zero_copy.receive sysctl variable is set to 1. uipc_cow.c: Send side zero copy functions. Takes a page written by the user and maps it copy on write and assigns it kernel virtual address space. Removes copy on write mapping once the buffer has been freed by the network stack. uipc_jumbo.c: Jumbo disposable page allocator code. This allocates (optionally) disposable pages for network drivers that want to give the user the option of doing zero copy receive. uipc_socket.c: Add kern.ipc.zero_copy.{send,receive} sysctls that are enabled if ZERO_COPY_SOCKETS is turned on. Add zero copy send support to sosend() -- pages get mapped into the kernel instead of getting copied if they meet size and alignment restrictions. uipc_syscalls.c:Un-staticize some of the sf* functions so that they can be used elsewhere. (uipc_cow.c) if_media.c: In the SIOCGIFMEDIA ioctl in ifmedia_ioctl(), avoid calling malloc() with M_WAITOK. Return an error if the M_NOWAIT malloc fails. The ti(4) driver and the wi(4) driver, at least, call this with a mutex held. This causes witness warnings for 'ifconfig -a' with a wi(4) or ti(4) board in the system. (I've only verified for ti(4)). ip_output.c: Fragment large datagrams so that each segment contains a multiple of PAGE_SIZE amount of data plus headers. This allows the receiver to potentially do page flipping on receives. if_ti.c: Add zero copy receive support to the ti(4) driver. If TI_PRIVATE_JUMBOS is not defined, it now uses the jumbo(9) buffer allocator for jumbo receive buffers. Add a new character device interface for the ti(4) driver for the new debugging interface. This allows (a patched version of) gdb to talk to the Tigon board and debug the firmware. There are also a few additional debugging ioctls available through this interface. Add header splitting support to the ti(4) driver. Tweak some of the default interrupt coalescing parameters to more useful defaults. Add hooks for supporting transmit flow control, but leave it turned off with a comment describing why it is turned off. if_tireg.h: Change the firmware rev to 12.4.11, since we're really at 12.4.11 plus fixes from 12.4.13. Add defines needed for debugging. Remove the ti_stats structure, it is now defined in sys/tiio.h. ti_fw.h: 12.4.11 firmware. ti_fw2.h: 12.4.11 firmware, plus selected fixes from 12.4.13, and my header splitting patches. Revision 12.4.13 doesn't handle 10/100 negotiation properly. (This firmware is the same as what was in the tree previously, with the addition of header splitting support.) sys/jumbo.h: Jumbo buffer allocator interface. sys/mbuf.h: Add a new external mbuf type, EXT_DISPOSABLE, to indicate that the payload buffer can be thrown away / flipped to a userland process. socketvar.h: Add prototype for socow_setup. tiio.h: ioctl interface to the character portion of the ti(4) driver, plus associated structure/type definitions. uio.h: Change prototype for uiomoveco() so that we'll know whether the source page is disposable. ufs_readwrite.c:Update for new prototype of uiomoveco(). vm_fault.c: In vm_fault(), check to see whether we need to do a page based copy on write fault. vm_object.c: Add a new function, vm_object_allocate_wait(). This does the same thing that vm_object allocate does, except that it gives the caller the opportunity to specify whether it should wait on the uma_zalloc() of the object structre. This allows vm objects to be allocated while holding a mutex. (Without generating WITNESS warnings.) vm_object_allocate() is implemented as a call to vm_object_allocate_wait() with the malloc flag set to M_WAITOK. vm_object.h: Add prototype for vm_object_allocate_wait(). vm_page.c: Add page-based copy on write setup, clear and fault routines. vm_page.h: Add page based COW function prototypes and variable in the vm_page structure. Many thanks to Drew Gallatin, who wrote the zero copy send and receive code, and to all the other folks who have tested and reviewed this code over the years.
2002-06-26 03:37:47 +00:00
for (; off < (u_short)ip->ip_len; off += len) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
MGETHDR(m, M_DONTWAIT, MT_HEADER);
if (m == 0) {
error = ENOBUFS;
ipstat.ips_odropped++;
goto sendorfree;
}
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
m->m_flags |= (m0->m_flags & M_MCAST) | M_FRAG;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
m->m_data += max_linkhdr;
mhip = mtod(m, struct ip *);
*mhip = *ip;
if (hlen > sizeof (struct ip)) {
mhlen = ip_optcopy(ip, mhip) + sizeof (struct ip);
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
mhip->ip_vhl = IP_MAKE_VHL(IPVERSION, mhlen >> 2);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
m->m_len = mhlen;
Save a few CPU cycles in IP fragmentation code.
2000-10-20 14:10:37 +00:00
mhip->ip_off = ((off - hlen) >> 3) + ip->ip_off;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (off + len >= (u_short)ip->ip_len)
len = (u_short)ip->ip_len - off;
else
mhip->ip_off |= IP_MF;
mhip->ip_len = htons((u_short)(len + mhlen));
m->m_next = m_copy(m0, off, len);
if (m->m_next == 0) {
(void) m_free(m);
error = ENOBUFS; /* ??? */
ipstat.ips_odropped++;
goto sendorfree;
}
m->m_pkthdr.len = mhlen + len;
m->m_pkthdr.rcvif = (struct ifnet *)0;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
m->m_pkthdr.csum_flags = m0->m_pkthdr.csum_flags;
o Move NTOHL() and associated macros into <sys/param.h>. These are deprecated in favor of the POSIX-defined lowercase variants. o Change all occurrences of NTOHL() and associated marcros in the source tree to use the lowercase function variants. o Add missing license bits to sparc64's <machine/endian.h>. Approved by: jake o Clean up <machine/endian.h> files. o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>. o Remove prototypes for non-existent bswapXX() functions. o Include <machine/endian.h> in <arpa/inet.h> to define the POSIX-required ntohl() family of functions. o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>, and <sys/param.h>. o Prepend underscores to the ntohl() family to help deal with complexities associated with having MD (asm and inline) versions, and having to prevent exposure of these functions in other headers that happen to make use of endian-specific defines. o Create weak aliases to the canonical function name to help deal with third-party software forgetting to include an appropriate header. o Remove some now unneeded pollution from <sys/types.h>. o Add missing <arpa/inet.h> includes in userland. Tested on: alpha, i386 Reviewed by: bde, jake, tmm
2002-02-18 20:35:27 +00:00
mhip->ip_off = htons(mhip->ip_off);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
mhip->ip_sum = 0;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
if (sw_csum & CSUM_DELAY_IP) {
if (mhip->ip_vhl == IP_VHL_BORING) {
mhip->ip_sum = in_cksum_hdr(mhip);
} else {
mhip->ip_sum = in_cksum(m, mhlen);
}
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*mnext = m;
mnext = &m->m_nextpkt;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
nfrags++;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
ipstat.ips_ofragments += nfrags;
/* set first/last markers for fragment chain */
m->m_flags |= M_LASTFRAG;
m0->m_flags |= M_FIRSTFRAG | M_FRAG;
m0->m_pkthdr.csum_data = nfrags;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Update first fragment by trimming what's been copied out
* and updating header, then send each fragment (in order).
*/
m = m0;
m_adj(m, hlen + firstlen - (u_short)ip->ip_len);
m->m_pkthdr.len = hlen + firstlen;
ip->ip_len = htons((u_short)m->m_pkthdr.len);
Fixed broken ICMP error generation, unified conversion of IP header fields between host and network byte order. The details: o icmp_error() now does not add IP header length. This fixes the problem when icmp_error() is called from ip_forward(). In this case the ip_len of the original IP datagram returned with ICMP error was wrong. o icmp_error() expects all three fields, ip_len, ip_id and ip_off in host byte order, so DTRT and convert these fields back to network byte order before sending a message. This fixes the problem described in PR 16240 and PR 20877 (ip_id field was returned in host byte order). o ip_ttl decrement operation in ip_forward() was moved down to make sure that it does not corrupt the copy of original IP datagram passed later to icmp_error(). o A copy of original IP datagram in ip_forward() was made a read-write, independent copy. This fixes the problem I first reported to Garrett Wollman and Bill Fenner and later put in audit trail of PR 16240: ip_output() (not always) converts fields of original datagram to network byte order, but because copy (mcopy) and its original (m) most likely share the same mbuf cluster, ip_output()'s manipulations on original also corrupted the copy. o ip_output() now expects all three fields, ip_len, ip_off and (what is significant) ip_id in host byte order. It was a headache for years that ip_id was handled differently. The only compatibility issue here is the raw IP socket interface with IP_HDRINCL socket option set and a non-zero ip_id field, but ip.4 manual page was unclear on whether in this case ip_id field should be in host or network byte order.
2000-09-01 12:33:03 +00:00
ip->ip_off |= IP_MF;
o Move NTOHL() and associated macros into <sys/param.h>. These are deprecated in favor of the POSIX-defined lowercase variants. o Change all occurrences of NTOHL() and associated marcros in the source tree to use the lowercase function variants. o Add missing license bits to sparc64's <machine/endian.h>. Approved by: jake o Clean up <machine/endian.h> files. o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>. o Remove prototypes for non-existent bswapXX() functions. o Include <machine/endian.h> in <arpa/inet.h> to define the POSIX-required ntohl() family of functions. o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>, and <sys/param.h>. o Prepend underscores to the ntohl() family to help deal with complexities associated with having MD (asm and inline) versions, and having to prevent exposure of these functions in other headers that happen to make use of endian-specific defines. o Create weak aliases to the canonical function name to help deal with third-party software forgetting to include an appropriate header. o Remove some now unneeded pollution from <sys/types.h>. o Add missing <arpa/inet.h> includes in userland. Tested on: alpha, i386 Reviewed by: bde, jake, tmm
2002-02-18 20:35:27 +00:00
ip->ip_off = htons(ip->ip_off);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ip->ip_sum = 0;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
if (sw_csum & CSUM_DELAY_IP) {
if (ip->ip_vhl == IP_VHL_BORING) {
ip->ip_sum = in_cksum_hdr(ip);
} else {
ip->ip_sum = in_cksum(m, hlen);
}
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
sendorfree:
for (m = m0; m; m = m0) {
m0 = m->m_nextpkt;
m->m_nextpkt = 0;
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
#ifdef IPSEC
/* clean ipsec history once it goes out of the node */
ipsec_delaux(m);
#endif
MFS: Avoid dropping fragments in the absence of an interface address. Noticed by: fenner Submitted by: iedowse Not committed to current by: iedowse ;-)
2001-08-03 17:36:06 +00:00
if (error == 0) {
Count per-address statistics for IP fragments. Requested by: ru Obtained from: BSD/OS
2000-10-29 01:05:09 +00:00
/* Record statistics for this interface address. */
MFS: Avoid dropping fragments in the absence of an interface address. Noticed by: fenner Submitted by: iedowse Not committed to current by: iedowse ;-)
2001-08-03 17:36:06 +00:00
if (ia != NULL) {
ia->ia_ifa.if_opackets++;
ia->ia_ifa.if_obytes += m->m_pkthdr.len;
}
Count per-address statistics for IP fragments. Requested by: ru Obtained from: BSD/OS
2000-10-29 01:05:09 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
error = (*ifp->if_output)(ifp, m,
(struct sockaddr *)dst, ro->ro_rt);
Count per-address statistics for IP fragments. Requested by: ru Obtained from: BSD/OS
2000-10-29 01:05:09 +00:00
} else
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
m_freem(m);
}
if (error == 0)
ipstat.ips_fragmented++;
}
done:
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
#ifdef IPSEC
if (ro == &iproute && ro->ro_rt) {
RTFREE(ro->ro_rt);
ro->ro_rt = NULL;
}
if (sp != NULL) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP ip_output call free SP:%p\n", sp));
key_freesp(sp);
}
#endif /* IPSEC */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
return (error);
bad:
Fix a (long standing?) bug in ip_output(): if ip_insertoptions() is called and ip_output() encounters an error and bails (i.e. host unreachable), we will leak an mbuf. This is because the code calls m_freem(m0) after jumping to the bad: label at the end of the function, when it should be calling m_freem(m). (m0 is the original mbuf list _without_ the options mbuf prepended.) Obtained from: NetBSD
2001-10-30 18:15:48 +00:00
m_freem(m);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
goto done;
}
Compute the checksum before handing the packet off to IPFilter. Tested by: Cy Schubert <Cy.Schubert@uumail.gov.bc.ca>
2000-05-21 21:26:06 +00:00
void
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
in_delayed_cksum(struct mbuf *m)
{
struct ip *ip;
u_short csum, offset;
ip = mtod(m, struct ip *);
offset = IP_VHL_HL(ip->ip_vhl) << 2 ;
csum = in_cksum_skip(m, ip->ip_len, offset);
RFC768 (UDP) requires that "if the computed checksum is zero, it is transmitted as all ones". This got broken after introduction of delayed checksums as follows. Some guys (including Jonathan) think that it is allowed to transmit all ones in place of a zero checksum for TCP the same way as for UDP. (The discussion still takes place on -net.) Thus, the 0 -> 0xffff checksum fixup was first moved from udp_output() (see udp_usrreq.c, 1.64 -> 1.65) to in_cksum_skip() (see sys/i386/i386/in_cksum.c, 1.17 -> 1.18, INVERT expression). Besides that I disagree that it is valid for TCP, there was no real problem until in_cksum.c,v 1.20, where the in_cksum() was made just a special version of in_cksum_skip(). The side effect was that now every incoming IP datagram failed to pass the checksum test (in_cksum() returned 0xffff when it should actually return zero). It was fixed next day in revision 1.21, by removing the INVERT expression. The latter also broke the 0 -> 0xffff fixup for UDP checksums. Before this change: : tcpdump: listening on lo0 : 127.0.0.1.33005 > 127.0.0.1.33006: udp 0 (ttl 64, id 1) : 4500 001c 0001 0000 4011 7cce 7f00 0001 : 7f00 0001 80ed 80ee 0008 0000 After this change: : tcpdump: listening on lo0 : 127.0.0.1.33005 > 127.0.0.1.33006: udp 0 (ttl 64, id 1) : 4500 001c 0001 0000 4011 7cce 7f00 0001 : 7f00 0001 80ed 80ee 0008 ffff
2001-03-13 17:07:06 +00:00
if (m->m_pkthdr.csum_flags & CSUM_UDP && csum == 0)
csum = 0xffff;
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
2000-03-27 19:14:27 +00:00
offset += m->m_pkthdr.csum_data; /* checksum offset */
if (offset + sizeof(u_short) > m->m_len) {
printf("delayed m_pullup, m->len: %d off: %d p: %d\n",
m->m_len, offset, ip->ip_p);
/*
* XXX
* this shouldn't happen, but if it does, the
* correct behavior may be to insert the checksum
* in the existing chain instead of rearranging it.
*/
m = m_pullup(m, offset + sizeof(u_short));
}
*(u_short *)(m->m_data + offset) = csum;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Insert IP options into preformed packet.
* Adjust IP destination as required for IP source routing,
* as indicated by a non-zero in_addr at the start of the options.
Fix ip option processing for raw IP sockets. This whole thing is a compromise between ignoring options specified in the setsockopt call if IP_HDRINCL is set (the UCB choice when VJ's code was brought in) vs allowing them (what everyone else did, and what is assumed by programs everywhere...sigh). Also perform some checking of the passed down packet to avoid running off the end of a mbuf chain. Reviewed by: fenner
1996-03-13 08:02:45 +00:00
*
* XXX This routine assumes that the packet has no options in place.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
static struct mbuf *
ip_insertoptions(m, opt, phlen)
register struct mbuf *m;
struct mbuf *opt;
int *phlen;
{
register struct ipoption *p = mtod(opt, struct ipoption *);
struct mbuf *n;
register struct ip *ip = mtod(m, struct ip *);
unsigned optlen;
optlen = opt->m_len - sizeof(p->ipopt_dst);
if (optlen + (u_short)ip->ip_len > IP_MAXPACKET)
return (m); /* XXX should fail */
if (p->ipopt_dst.s_addr)
ip->ip_dst = p->ipopt_dst;
if (m->m_flags & M_EXT || m->m_data - optlen < m->m_pktdat) {
MGETHDR(n, M_DONTWAIT, MT_HEADER);
if (n == 0)
return (m);
MGETHDR() does not initialize m_pkthdr.rcvif, do it here. This fixes page fault panic observed when diverting packets with IP options (e.g. ping -R remoteIP over natd). PR: kern/8596, kern/11199
2000-01-10 18:46:05 +00:00
n->m_pkthdr.rcvif = (struct ifnet *)0;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
n->m_pkthdr.len = m->m_pkthdr.len + optlen;
m->m_len -= sizeof(struct ip);
m->m_data += sizeof(struct ip);
n->m_next = m;
m = n;
m->m_len = optlen + sizeof(struct ip);
m->m_data += max_linkhdr;
Replaced some bcopy()'s with memcpy()'s so that gcc while inline/optimize.
1995-05-09 13:35:48 +00:00
(void)memcpy(mtod(m, void *), ip, sizeof(struct ip));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
} else {
m->m_data -= optlen;
m->m_len += optlen;
m->m_pkthdr.len += optlen;
ovbcopy((caddr_t)ip, mtod(m, caddr_t), sizeof(struct ip));
}
ip = mtod(m, struct ip *);
Changed some memcpy()'s back to bcopy()'s. gcc only inlines memcpy()'s whose count is constant and didn't inline these. I want memcpy() in the kernel go away so that it's obvious that it doesn't need to be optimized. Now it is only used for one struct copy in si.c.
1996-06-08 08:19:03 +00:00
bcopy(p->ipopt_list, ip + 1, optlen);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*phlen = sizeof(struct ip) + optlen;
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
ip->ip_vhl = IP_MAKE_VHL(IPVERSION, *phlen >> 2);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ip->ip_len += optlen;
return (m);
}
/*
* Copy options from ip to jp,
* omitting those not copied during fragmentation.
*/
Resolve conflicts created by import.
1997-04-03 10:47:12 +00:00
int
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ip_optcopy(ip, jp)
struct ip *ip, *jp;
{
register u_char *cp, *dp;
int opt, optlen, cnt;
cp = (u_char *)(ip + 1);
dp = (u_char *)(jp + 1);
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
cnt = (IP_VHL_HL(ip->ip_vhl) << 2) - sizeof (struct ip);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
for (; cnt > 0; cnt -= optlen, cp += optlen) {
opt = cp[0];
if (opt == IPOPT_EOL)
break;
if (opt == IPOPT_NOP) {
/* Preserve for IP mcast tunnel's LSRR alignment. */
*dp++ = IPOPT_NOP;
optlen = 1;
continue;
sync with kame tree as of july00. tons of bug fixes/improvements. API changes: - additional IPv6 ioctls - IPsec PF_KEY API was changed, it is mandatory to upgrade setkey(8). (also syntax change)
2000-07-04 16:35:15 +00:00
}
- Change the newly turned INVARIANTS #ifdef blocks (they were changed from DIAGNOSTIC yesterday) into KASSERT()'s as these help to increase code readability.
2002-05-21 18:52:24 +00:00
KASSERT(cnt >= IPOPT_OLEN + sizeof(*cp),
("ip_optcopy: malformed ipv4 option"));
sync with kame tree as of july00. tons of bug fixes/improvements. API changes: - additional IPv6 ioctls - IPsec PF_KEY API was changed, it is mandatory to upgrade setkey(8). (also syntax change)
2000-07-04 16:35:15 +00:00
optlen = cp[IPOPT_OLEN];
- Change the newly turned INVARIANTS #ifdef blocks (they were changed from DIAGNOSTIC yesterday) into KASSERT()'s as these help to increase code readability.
2002-05-21 18:52:24 +00:00
KASSERT(optlen >= IPOPT_OLEN + sizeof(*cp) && optlen <= cnt,
("ip_optcopy: malformed ipv4 option"));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* bogus lengths should have been caught by ip_dooptions */
if (optlen > cnt)
optlen = cnt;
if (IPOPT_COPIED(opt)) {
Changed some memcpy()'s back to bcopy()'s. gcc only inlines memcpy()'s whose count is constant and didn't inline these. I want memcpy() in the kernel go away so that it's obvious that it doesn't need to be optimized. Now it is only used for one struct copy in si.c.
1996-06-08 08:19:03 +00:00
bcopy(cp, dp, optlen);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
dp += optlen;
}
}
for (optlen = dp - (u_char *)(jp+1); optlen & 0x3; optlen++)
*dp++ = IPOPT_EOL;
return (optlen);
}
/*
* IP socket option processing.
*/
int
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
ip_ctloutput(so, sopt)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct socket *so;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
struct sockopt *sopt;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
struct inpcb *inp = sotoinpcb(so);
int error, optval;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = optval = 0;
if (sopt->sopt_level != IPPROTO_IP) {
return (EINVAL);
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
switch (sopt->sopt_dir) {
case SOPT_SET:
switch (sopt->sopt_name) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_OPTIONS:
#ifdef notyet
case IP_RETOPTS:
#endif
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
{
struct mbuf *m;
if (sopt->sopt_valsize > MLEN) {
error = EMSGSIZE;
break;
}
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
MGET(m, sopt->sopt_td ? M_TRYWAIT : M_DONTWAIT, MT_HEADER);
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (m == 0) {
error = ENOBUFS;
break;
}
m->m_len = sopt->sopt_valsize;
error = sooptcopyin(sopt, mtod(m, char *), m->m_len,
m->m_len);
return (ip_pcbopts(sopt->sopt_name, &inp->inp_options,
m));
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_TOS:
case IP_TTL:
case IP_RECVOPTS:
case IP_RECVRETOPTS:
case IP_RECVDSTADDR:
Add the IP_RECVIF socket option, which supplies a packet's incoming interface using a sockaddr_dl. Fix the other packet-information socket options (SO_TIMESTAMP, IP_RECVDSTADDR) to work for multicast UDP and raw sockets as well. (They previously only worked for unicast UDP).
1996-11-11 04:56:32 +00:00
case IP_RECVIF:
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
case IP_FAITH:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = sooptcopyin(sopt, &optval, sizeof optval,
sizeof optval);
if (error)
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
switch (sopt->sopt_name) {
case IP_TOS:
inp->inp_ip_tos = optval;
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case IP_TTL:
inp->inp_ip_ttl = optval;
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#define OPTSET(bit) \
if (optval) \
inp->inp_flags |= bit; \
else \
inp->inp_flags &= ~bit;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case IP_RECVOPTS:
OPTSET(INP_RECVOPTS);
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case IP_RECVRETOPTS:
OPTSET(INP_RECVRETOPTS);
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case IP_RECVDSTADDR:
OPTSET(INP_RECVDSTADDR);
break;
Add the IP_RECVIF socket option, which supplies a packet's incoming interface using a sockaddr_dl. Fix the other packet-information socket options (SO_TIMESTAMP, IP_RECVDSTADDR) to work for multicast UDP and raw sockets as well. (They previously only worked for unicast UDP).
1996-11-11 04:56:32 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case IP_RECVIF:
OPTSET(INP_RECVIF);
break;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
case IP_FAITH:
OPTSET(INP_FAITH);
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
break;
#undef OPTSET
case IP_MULTICAST_IF:
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
case IP_MULTICAST_VIF:
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_MULTICAST_TTL:
case IP_MULTICAST_LOOP:
case IP_ADD_MEMBERSHIP:
case IP_DROP_MEMBERSHIP:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = ip_setmoptions(sopt, &inp->inp_moptions);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
Make the default behavior of local port assignment match traditional systems (my last change did not mix well with some firewall configurations). As much as I dislike firewalls, this is one thing I I was not prepared to break by default.. :-) Allow the user to nominate one of three ranges of port numbers as candidates for selecting a local address to replace a zero port number. The ranges are selected via a setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &arg) call. The three ranges are: default, high (to bypass firewalls) and low (to get a port below 1024). The default and high port ranges are sysctl settable under sysctl net.inet.ip.portrange.* This code also fixes a potential deadlock if the system accidently ran out of local port addresses. It'd drop into an infinite while loop. The secure port selection (for root) should reduce overheads and increase reliability of rlogin/rlogind/rsh/rshd if they are modified to take advantage of it. Partly suggested by: pst Reviewed by: wollman
1996-02-22 21:32:23 +00:00
case IP_PORTRANGE:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = sooptcopyin(sopt, &optval, sizeof optval,
sizeof optval);
if (error)
break;
Make the default behavior of local port assignment match traditional systems (my last change did not mix well with some firewall configurations). As much as I dislike firewalls, this is one thing I I was not prepared to break by default.. :-) Allow the user to nominate one of three ranges of port numbers as candidates for selecting a local address to replace a zero port number. The ranges are selected via a setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &arg) call. The three ranges are: default, high (to bypass firewalls) and low (to get a port below 1024). The default and high port ranges are sysctl settable under sysctl net.inet.ip.portrange.* This code also fixes a potential deadlock if the system accidently ran out of local port addresses. It'd drop into an infinite while loop. The secure port selection (for root) should reduce overheads and increase reliability of rlogin/rlogind/rsh/rshd if they are modified to take advantage of it. Partly suggested by: pst Reviewed by: wollman
1996-02-22 21:32:23 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
switch (optval) {
case IP_PORTRANGE_DEFAULT:
inp->inp_flags &= ~(INP_LOWPORT);
inp->inp_flags &= ~(INP_HIGHPORT);
break;
Make the default behavior of local port assignment match traditional systems (my last change did not mix well with some firewall configurations). As much as I dislike firewalls, this is one thing I I was not prepared to break by default.. :-) Allow the user to nominate one of three ranges of port numbers as candidates for selecting a local address to replace a zero port number. The ranges are selected via a setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &arg) call. The three ranges are: default, high (to bypass firewalls) and low (to get a port below 1024). The default and high port ranges are sysctl settable under sysctl net.inet.ip.portrange.* This code also fixes a potential deadlock if the system accidently ran out of local port addresses. It'd drop into an infinite while loop. The secure port selection (for root) should reduce overheads and increase reliability of rlogin/rlogind/rsh/rshd if they are modified to take advantage of it. Partly suggested by: pst Reviewed by: wollman
1996-02-22 21:32:23 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case IP_PORTRANGE_HIGH:
inp->inp_flags &= ~(INP_LOWPORT);
inp->inp_flags |= INP_HIGHPORT;
break;
Make the default behavior of local port assignment match traditional systems (my last change did not mix well with some firewall configurations). As much as I dislike firewalls, this is one thing I I was not prepared to break by default.. :-) Allow the user to nominate one of three ranges of port numbers as candidates for selecting a local address to replace a zero port number. The ranges are selected via a setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &arg) call. The three ranges are: default, high (to bypass firewalls) and low (to get a port below 1024). The default and high port ranges are sysctl settable under sysctl net.inet.ip.portrange.* This code also fixes a potential deadlock if the system accidently ran out of local port addresses. It'd drop into an infinite while loop. The secure port selection (for root) should reduce overheads and increase reliability of rlogin/rlogind/rsh/rshd if they are modified to take advantage of it. Partly suggested by: pst Reviewed by: wollman
1996-02-22 21:32:23 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case IP_PORTRANGE_LOW:
inp->inp_flags &= ~(INP_HIGHPORT);
inp->inp_flags |= INP_LOWPORT;
break;
Make the default behavior of local port assignment match traditional systems (my last change did not mix well with some firewall configurations). As much as I dislike firewalls, this is one thing I I was not prepared to break by default.. :-) Allow the user to nominate one of three ranges of port numbers as candidates for selecting a local address to replace a zero port number. The ranges are selected via a setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &arg) call. The three ranges are: default, high (to bypass firewalls) and low (to get a port below 1024). The default and high port ranges are sysctl settable under sysctl net.inet.ip.portrange.* This code also fixes a potential deadlock if the system accidently ran out of local port addresses. It'd drop into an infinite while loop. The secure port selection (for root) should reduce overheads and increase reliability of rlogin/rlogind/rsh/rshd if they are modified to take advantage of it. Partly suggested by: pst Reviewed by: wollman
1996-02-22 21:32:23 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
default:
error = EINVAL;
break;
Make the default behavior of local port assignment match traditional systems (my last change did not mix well with some firewall configurations). As much as I dislike firewalls, this is one thing I I was not prepared to break by default.. :-) Allow the user to nominate one of three ranges of port numbers as candidates for selecting a local address to replace a zero port number. The ranges are selected via a setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &arg) call. The three ranges are: default, high (to bypass firewalls) and low (to get a port below 1024). The default and high port ranges are sysctl settable under sysctl net.inet.ip.portrange.* This code also fixes a potential deadlock if the system accidently ran out of local port addresses. It'd drop into an infinite while loop. The secure port selection (for root) should reduce overheads and increase reliability of rlogin/rlogind/rsh/rshd if they are modified to take advantage of it. Partly suggested by: pst Reviewed by: wollman
1996-02-22 21:32:23 +00:00
}
Fix an embarresing error on my part that made the IP_PORTRANGE options return a failure code (even though it worked). This commit brought to you by the 'C' keyword "break".. :-)
1996-05-21 20:47:31 +00:00
break;
Make the default behavior of local port assignment match traditional systems (my last change did not mix well with some firewall configurations). As much as I dislike firewalls, this is one thing I I was not prepared to break by default.. :-) Allow the user to nominate one of three ranges of port numbers as candidates for selecting a local address to replace a zero port number. The ranges are selected via a setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &arg) call. The three ranges are: default, high (to bypass firewalls) and low (to get a port below 1024). The default and high port ranges are sysctl settable under sysctl net.inet.ip.portrange.* This code also fixes a potential deadlock if the system accidently ran out of local port addresses. It'd drop into an infinite while loop. The secure port selection (for root) should reduce overheads and increase reliability of rlogin/rlogind/rsh/rshd if they are modified to take advantage of it. Partly suggested by: pst Reviewed by: wollman
1996-02-22 21:32:23 +00:00
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
#ifdef IPSEC
case IP_IPSEC_POLICY:
{
caddr_t req;
sync with kame tree as of july00. tons of bug fixes/improvements. API changes: - additional IPv6 ioctls - IPsec PF_KEY API was changed, it is mandatory to upgrade setkey(8). (also syntax change)
2000-07-04 16:35:15 +00:00
size_t len = 0;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
int priv;
struct mbuf *m;
int optname;
if ((error = soopt_getm(sopt, &m)) != 0) /* XXX */
break;
if ((error = soopt_mcopyin(sopt, m)) != 0) /* XXX */
break;
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
priv = (sopt->sopt_td != NULL &&
Change the suser() API to take advantage of td_ucred as well as do a general cleanup of the API. The entire API now consists of two functions similar to the pre-KSE API. The suser() function takes a thread pointer as its only argument. The td_ucred member of this thread must be valid so the only valid thread pointers are curthread and a few kernel threads such as thread0. The suser_cred() function takes a pointer to a struct ucred as its first argument and an integer flag as its second argument. The flag is currently only used for the PRISON_ROOT flag. Discussed on: smp@
2002-04-01 21:31:13 +00:00
suser(sopt->sopt_td) != 0) ? 0 : 1;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
req = mtod(m, caddr_t);
sync with kame tree as of july00. tons of bug fixes/improvements. API changes: - additional IPv6 ioctls - IPsec PF_KEY API was changed, it is mandatory to upgrade setkey(8). (also syntax change)
2000-07-04 16:35:15 +00:00
len = m->m_len;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
optname = sopt->sopt_name;
sync with kame tree as of july00. tons of bug fixes/improvements. API changes: - additional IPv6 ioctls - IPsec PF_KEY API was changed, it is mandatory to upgrade setkey(8). (also syntax change)
2000-07-04 16:35:15 +00:00
error = ipsec4_set_policy(inp, optname, req, len, priv);
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
m_freem(m);
break;
}
#endif /*IPSEC*/
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
default:
error = ENOPROTOOPT;
break;
}
break;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case SOPT_GET:
switch (sopt->sopt_name) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_OPTIONS:
case IP_RETOPTS:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (inp->inp_options)
error = sooptcopyout(sopt,
mtod(inp->inp_options,
char *),
inp->inp_options->m_len);
else
sopt->sopt_valsize = 0;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
case IP_TOS:
case IP_TTL:
case IP_RECVOPTS:
case IP_RECVRETOPTS:
case IP_RECVDSTADDR:
Add the IP_RECVIF socket option, which supplies a packet's incoming interface using a sockaddr_dl. Fix the other packet-information socket options (SO_TIMESTAMP, IP_RECVDSTADDR) to work for multicast UDP and raw sockets as well. (They previously only worked for unicast UDP).
1996-11-11 04:56:32 +00:00
case IP_RECVIF:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case IP_PORTRANGE:
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
case IP_FAITH:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
switch (sopt->sopt_name) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_TOS:
Reorganize elements of the inpcb struct to take better advantage of cache lines. Removed the struct ip proto since only a couple of chars were actually being used in it. Changed the order of compares in the PCB hash lookup to take advantage of partial cache line fills (on PPro). Discussed-with: wollman
1997-04-03 05:14:45 +00:00
optval = inp->inp_ip_tos;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
case IP_TTL:
Reorganize elements of the inpcb struct to take better advantage of cache lines. Removed the struct ip proto since only a couple of chars were actually being used in it. Changed the order of compares in the PCB hash lookup to take advantage of partial cache line fills (on PPro). Discussed-with: wollman
1997-04-03 05:14:45 +00:00
optval = inp->inp_ip_ttl;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
#define OPTBIT(bit) (inp->inp_flags & bit ? 1 : 0)
case IP_RECVOPTS:
optval = OPTBIT(INP_RECVOPTS);
break;
case IP_RECVRETOPTS:
optval = OPTBIT(INP_RECVRETOPTS);
break;
case IP_RECVDSTADDR:
optval = OPTBIT(INP_RECVDSTADDR);
break;
Add the IP_RECVIF socket option, which supplies a packet's incoming interface using a sockaddr_dl. Fix the other packet-information socket options (SO_TIMESTAMP, IP_RECVDSTADDR) to work for multicast UDP and raw sockets as well. (They previously only worked for unicast UDP).
1996-11-11 04:56:32 +00:00
case IP_RECVIF:
optval = OPTBIT(INP_RECVIF);
break;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
case IP_PORTRANGE:
if (inp->inp_flags & INP_HIGHPORT)
optval = IP_PORTRANGE_HIGH;
else if (inp->inp_flags & INP_LOWPORT)
optval = IP_PORTRANGE_LOW;
else
optval = 0;
break;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
case IP_FAITH:
optval = OPTBIT(INP_FAITH);
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = sooptcopyout(sopt, &optval, sizeof optval);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
case IP_MULTICAST_IF:
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
case IP_MULTICAST_VIF:
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_MULTICAST_TTL:
case IP_MULTICAST_LOOP:
case IP_ADD_MEMBERSHIP:
case IP_DROP_MEMBERSHIP:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = ip_getmoptions(sopt, inp->inp_moptions);
Make the default behavior of local port assignment match traditional systems (my last change did not mix well with some firewall configurations). As much as I dislike firewalls, this is one thing I I was not prepared to break by default.. :-) Allow the user to nominate one of three ranges of port numbers as candidates for selecting a local address to replace a zero port number. The ranges are selected via a setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &arg) call. The three ranges are: default, high (to bypass firewalls) and low (to get a port below 1024). The default and high port ranges are sysctl settable under sysctl net.inet.ip.portrange.* This code also fixes a potential deadlock if the system accidently ran out of local port addresses. It'd drop into an infinite while loop. The secure port selection (for root) should reduce overheads and increase reliability of rlogin/rlogind/rsh/rshd if they are modified to take advantage of it. Partly suggested by: pst Reviewed by: wollman
1996-02-22 21:32:23 +00:00
break;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
#ifdef IPSEC
case IP_IPSEC_POLICY:
{
Initialize mbuf pointer at getting ipsec policy. Without this, kernel will panic at getsockopt() of IPSEC_POLICY. Also make compilable libipsec/test-policy.c which tries getsockopt() of IPSEC_POLICY. Approved by: jkh Submitted by: sakane@kame.net
2000-03-09 14:57:16 +00:00
struct mbuf *m = NULL;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
caddr_t req = NULL;
sync with kame tree as of july00. tons of bug fixes/improvements. API changes: - additional IPv6 ioctls - IPsec PF_KEY API was changed, it is mandatory to upgrade setkey(8). (also syntax change)
2000-07-04 16:35:15 +00:00
size_t len = 0;
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
sync with kame tree as of july00. tons of bug fixes/improvements. API changes: - additional IPv6 ioctls - IPsec PF_KEY API was changed, it is mandatory to upgrade setkey(8). (also syntax change)
2000-07-04 16:35:15 +00:00
if (m != 0) {
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
req = mtod(m, caddr_t);
sync with kame tree as of july00. tons of bug fixes/improvements. API changes: - additional IPv6 ioctls - IPsec PF_KEY API was changed, it is mandatory to upgrade setkey(8). (also syntax change)
2000-07-04 16:35:15 +00:00
len = m->m_len;
}
error = ipsec4_get_policy(sotoinpcb(so), req, len, &m);
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
if (error == 0)
error = soopt_mcopyout(sopt, m); /* XXX */
Initialize mbuf pointer at getting ipsec policy. Without this, kernel will panic at getsockopt() of IPSEC_POLICY. Also make compilable libipsec/test-policy.c which tries getsockopt() of IPSEC_POLICY. Approved by: jkh Submitted by: sakane@kame.net
2000-03-09 14:57:16 +00:00
if (error == 0)
m_freem(m);
IPSEC support in the kernel. pr_input() routines prototype is also changed to support IPSEC and IPV6 chained protocol headers. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
1999-12-22 19:13:38 +00:00
break;
}
#endif /*IPSEC*/
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
default:
error = ENOPROTOOPT;
break;
}
break;
}
return (error);
}
/*
* Set up IP options in pcb for insertion in output packets.
* Store in mbuf with pointer in pcbopt, adding pseudo-option
* with destination address if source routed.
*/
New style sysctl & staticize alot of stuff.
1995-11-14 20:34:56 +00:00
static int
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ip_pcbopts(optname, pcbopt, m)
int optname;
struct mbuf **pcbopt;
register struct mbuf *m;
{
Don't depend on "implicit int".
1998-02-20 13:37:40 +00:00
register int cnt, optlen;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
register u_char *cp;
u_char opt;
/* turn off any old options */
if (*pcbopt)
(void)m_free(*pcbopt);
*pcbopt = 0;
if (m == (struct mbuf *)0 || m->m_len == 0) {
/*
* Only turning off any previous options.
*/
if (m)
(void)m_free(m);
return (0);
}
Fixed some longs that should have been fixed-sized types.
1998-07-13 12:12:25 +00:00
if (m->m_len % sizeof(int32_t))
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
goto bad;
/*
* IP first-hop destination address will be stored before
* actual options; move other options back
* and clear it when none present.
*/
if (m->m_data + m->m_len + sizeof(struct in_addr) >= &m->m_dat[MLEN])
goto bad;
cnt = m->m_len;
m->m_len += sizeof(struct in_addr);
cp = mtod(m, u_char *) + sizeof(struct in_addr);
ovbcopy(mtod(m, caddr_t), (caddr_t)cp, (unsigned)cnt);
bzero(mtod(m, caddr_t), sizeof(struct in_addr));
for (; cnt > 0; cnt -= optlen, cp += optlen) {
opt = cp[IPOPT_OPTVAL];
if (opt == IPOPT_EOL)
break;
if (opt == IPOPT_NOP)
optlen = 1;
else {
Add boundary checks against IP options. Obtained from: OpenBSD
2000-06-02 20:18:38 +00:00
if (cnt < IPOPT_OLEN + sizeof(*cp))
goto bad;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
optlen = cp[IPOPT_OLEN];
Add boundary checks against IP options. Obtained from: OpenBSD
2000-06-02 20:18:38 +00:00
if (optlen < IPOPT_OLEN + sizeof(*cp) || optlen > cnt)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
goto bad;
}
switch (opt) {
default:
break;
case IPOPT_LSRR:
case IPOPT_SSRR:
/*
* user process specifies route as:
* ->A->B->C->D
* D must be our final destination (but we can't
* check that since we may not have connected yet).
* A is first hop destination, which doesn't appear in
* actual IP option, but is stored before the options.
*/
if (optlen < IPOPT_MINOFF - 1 + sizeof(struct in_addr))
goto bad;
m->m_len -= sizeof(struct in_addr);
cnt -= sizeof(struct in_addr);
optlen -= sizeof(struct in_addr);
cp[IPOPT_OLEN] = optlen;
/*
* Move first hop before start of options.
*/
bcopy((caddr_t)&cp[IPOPT_OFFSET+1], mtod(m, caddr_t),
sizeof(struct in_addr));
/*
* Then copy rest of options back
* to close up the deleted entry.
*/
ovbcopy((caddr_t)(&cp[IPOPT_OFFSET+1] +
sizeof(struct in_addr)),
(caddr_t)&cp[IPOPT_OFFSET+1],
(unsigned)cnt + sizeof(struct in_addr));
break;
}
}
if (m->m_len > MAX_IPOPTLEN + sizeof(struct in_addr))
goto bad;
*pcbopt = m;
return (0);
bad:
(void)m_free(m);
return (EINVAL);
}
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
/*
* XXX
* The whole multicast option thing needs to be re-thought.
* Several of these options are equally applicable to non-multicast
* transmission, and one (IP_MULTICAST_TTL) totally duplicates a
* standard option (IP_TTL).
*/
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
/*
* following RFC1724 section 3.3, 0.0.0.0/8 is interpreted as interface index.
*/
static struct ifnet *
ip_multicast_if(a, ifindexp)
struct in_addr *a;
int *ifindexp;
{
int ifindex;
struct ifnet *ifp;
if (ifindexp)
*ifindexp = 0;
if (ntohl(a->s_addr) >> 24 == 0) {
ifindex = ntohl(a->s_addr) & 0xffffff;
if (ifindex < 0 || if_index < ifindex)
return NULL;
Wrap array accesses in macros, which also happen to be lvalues: ifnet_addrs[i - 1] -> ifaddr_byindex(i) ifindex2ifnet[i] -> ifnet_byindex(i) This is intended to ease the conversion to SMPng.
2001-09-06 02:40:43 +00:00
ifp = ifnet_byindex(ifindex);
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
if (ifindexp)
*ifindexp = ifindex;
} else {
INADDR_TO_IFP(*a, ifp);
}
return ifp;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Set the IP multicast options in response to user setsockopt().
*/
New style sysctl & staticize alot of stuff.
1995-11-14 20:34:56 +00:00
static int
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
ip_setmoptions(sopt, imop)
struct sockopt *sopt;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct ip_moptions **imop;
{
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
int error = 0;
int i;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct in_addr addr;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
struct ip_mreq mreq;
struct ifnet *ifp;
struct ip_moptions *imo = *imop;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct route ro;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
struct sockaddr_in *dst;
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
int ifindex;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
int s;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (imo == NULL) {
/*
* No multicast option buffer attached to the pcb;
* allocate one and initialize to default values.
*/
imo = (struct ip_moptions*)malloc(sizeof(*imo), M_IPMOPTS,
M_WAITOK);
if (imo == NULL)
return (ENOBUFS);
*imop = imo;
imo->imo_multicast_ifp = NULL;
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
imo->imo_multicast_addr.s_addr = INADDR_ANY;
Kernel side of 3.5 multicast routing code, based on work by Bill Fenner and other work done here. The LKM support is probably broken, but it still compiles and will be fixed later.
1995-06-13 17:51:16 +00:00
imo->imo_multicast_vif = -1;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
imo->imo_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
imo->imo_multicast_loop = IP_DEFAULT_MULTICAST_LOOP;
imo->imo_num_memberships = 0;
}
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
switch (sopt->sopt_name) {
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
/* store an index number for the vif you wanna use in the send */
case IP_MULTICAST_VIF:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (legal_vif_num == 0) {
Shuffle some functions and variables around to make it possible for multicast routing to be implemented as an LKM. (There's still a bit of work to do in this area.)
1994-09-14 03:10:15 +00:00
error = EOPNOTSUPP;
break;
}
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = sooptcopyin(sopt, &i, sizeof i, sizeof i);
if (error)
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
break;
Kernel side of 3.5 multicast routing code, based on work by Bill Fenner and other work done here. The LKM support is probably broken, but it still compiles and will be fixed later.
1995-06-13 17:51:16 +00:00
if (!legal_vif_num(i) && (i != -1)) {
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
error = EINVAL;
break;
}
imo->imo_multicast_vif = i;
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_MULTICAST_IF:
/*
* Select the interface for outgoing multicast packets.
*/
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = sooptcopyin(sopt, &addr, sizeof addr, sizeof addr);
if (error)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
/*
* INADDR_ANY is used to remove a previous selection.
* When no interface is selected, a default one is
* chosen every time a multicast packet is sent.
*/
if (addr.s_addr == INADDR_ANY) {
imo->imo_multicast_ifp = NULL;
break;
}
/*
* The selected interface is identified by its local
* IP address. Find the interface and confirm that
* it supports multicasting.
*/
This should be splimp() rather than splnet() since ifaddrs might go away as a result of link-layer processing.
1995-03-20 18:31:51 +00:00
s = splimp();
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
ifp = ip_multicast_if(&addr, &ifindex);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
Add missing splx(s) in IP_MULTICAST_IF Submitted by: Jim Binkley <jrb@cs.pdx.edu>
1996-03-26 18:56:51 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
error = EADDRNOTAVAIL;
break;
}
imo->imo_multicast_ifp = ifp;
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
if (ifindex)
imo->imo_multicast_addr = addr;
else
imo->imo_multicast_addr.s_addr = INADDR_ANY;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
case IP_MULTICAST_TTL:
/*
* Set the IP time-to-live for outgoing multicast packets.
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
* The original multicast API required a char argument,
* which is inconsistent with the rest of the socket API.
* We allow either a char or an int.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (sopt->sopt_valsize == 1) {
u_char ttl;
error = sooptcopyin(sopt, &ttl, 1, 1);
if (error)
break;
imo->imo_multicast_ttl = ttl;
} else {
u_int ttl;
error = sooptcopyin(sopt, &ttl, sizeof ttl,
sizeof ttl);
if (error)
break;
if (ttl > 255)
error = EINVAL;
else
imo->imo_multicast_ttl = ttl;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
break;
case IP_MULTICAST_LOOP:
/*
* Set the loopback flag for outgoing multicast packets.
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
* Must be zero or one. The original multicast API required a
* char argument, which is inconsistent with the rest
* of the socket API. We allow either a char or an int.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (sopt->sopt_valsize == 1) {
u_char loop;
error = sooptcopyin(sopt, &loop, 1, 1);
if (error)
break;
imo->imo_multicast_loop = !!loop;
} else {
u_int loop;
error = sooptcopyin(sopt, &loop, sizeof loop,
sizeof loop);
if (error)
break;
imo->imo_multicast_loop = !!loop;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
break;
case IP_ADD_MEMBERSHIP:
/*
* Add a multicast group membership.
* Group must be a valid IP multicast address.
*/
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = sooptcopyin(sopt, &mreq, sizeof mreq, sizeof mreq);
if (error)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (!IN_MULTICAST(ntohl(mreq.imr_multiaddr.s_addr))) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
error = EINVAL;
break;
}
This should be splimp() rather than splnet() since ifaddrs might go away as a result of link-layer processing.
1995-03-20 18:31:51 +00:00
s = splimp();
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* If no interface address was provided, use the interface of
* the route to the given multicast address.
*/
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (mreq.imr_interface.s_addr == INADDR_ANY) {
Kernel side of 3.5 multicast routing code, based on work by Bill Fenner and other work done here. The LKM support is probably broken, but it still compiles and will be fixed later.
1995-06-13 17:51:16 +00:00
bzero((caddr_t)&ro, sizeof(ro));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
dst = (struct sockaddr_in *)&ro.ro_dst;
dst->sin_len = sizeof(*dst);
dst->sin_family = AF_INET;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
dst->sin_addr = mreq.imr_multiaddr;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
rtalloc(&ro);
if (ro.ro_rt == NULL) {
error = EADDRNOTAVAIL;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
}
ifp = ro.ro_rt->rt_ifp;
rtfree(ro.ro_rt);
}
else {
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
ifp = ip_multicast_if(&mreq.imr_interface, NULL);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* See if we found an interface, and confirm that it
* supports multicast.
*/
if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
error = EADDRNOTAVAIL;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
}
/*
* See if the membership already exists or if all the
* membership slots are full.
*/
for (i = 0; i < imo->imo_num_memberships; ++i) {
if (imo->imo_membership[i]->inm_ifp == ifp &&
imo->imo_membership[i]->inm_addr.s_addr
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
== mreq.imr_multiaddr.s_addr)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
}
if (i < imo->imo_num_memberships) {
error = EADDRINUSE;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
}
if (i == IP_MAX_MEMBERSHIPS) {
error = ETOOMANYREFS;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
}
/*
* Everything looks good; add a new record to the multicast
* address list for the given interface.
*/
if ((imo->imo_membership[i] =
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
in_addmulti(&mreq.imr_multiaddr, ifp)) == NULL) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
error = ENOBUFS;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
}
++imo->imo_num_memberships;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
case IP_DROP_MEMBERSHIP:
/*
* Drop a multicast group membership.
* Group must be a valid IP multicast address.
*/
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = sooptcopyin(sopt, &mreq, sizeof mreq, sizeof mreq);
if (error)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (!IN_MULTICAST(ntohl(mreq.imr_multiaddr.s_addr))) {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
error = EINVAL;
break;
}
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
This should be splimp() rather than splnet() since ifaddrs might go away as a result of link-layer processing.
1995-03-20 18:31:51 +00:00
s = splimp();
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* If an interface address was specified, get a pointer
* to its ifnet structure.
*/
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (mreq.imr_interface.s_addr == INADDR_ANY)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ifp = NULL;
else {
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
ifp = ip_multicast_if(&mreq.imr_interface, NULL);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (ifp == NULL) {
error = EADDRNOTAVAIL;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
}
}
/*
* Find the membership in the membership array.
*/
for (i = 0; i < imo->imo_num_memberships; ++i) {
if ((ifp == NULL ||
imo->imo_membership[i]->inm_ifp == ifp) &&
imo->imo_membership[i]->inm_addr.s_addr ==
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
mreq.imr_multiaddr.s_addr)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
}
if (i == imo->imo_num_memberships) {
error = EADDRNOTAVAIL;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
}
/*
* Give up the multicast address record to which the
* membership points.
*/
in_delmulti(imo->imo_membership[i]);
/*
* Remove the gap in the membership array.
*/
for (++i; i < imo->imo_num_memberships; ++i)
imo->imo_membership[i-1] = imo->imo_membership[i];
--imo->imo_num_memberships;
Fix race conditions involved in setting IP multicast options. This should fix Dennis Fortin's problem for good, if I've got it figured out right. (The problem was that a `struct ifaddr' could get deleted out from under the current requester, thus leaving him with an invalid interface pointer and causing even more bogus accesses.)
1995-03-20 18:11:31 +00:00
splx(s);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
break;
default:
error = EOPNOTSUPP;
break;
}
/*
* If all options have default values, no need to keep the mbuf.
*/
if (imo->imo_multicast_ifp == NULL &&
Kernel side of 3.5 multicast routing code, based on work by Bill Fenner and other work done here. The LKM support is probably broken, but it still compiles and will be fixed later.
1995-06-13 17:51:16 +00:00
imo->imo_multicast_vif == -1 &&
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
imo->imo_multicast_ttl == IP_DEFAULT_MULTICAST_TTL &&
imo->imo_multicast_loop == IP_DEFAULT_MULTICAST_LOOP &&
imo->imo_num_memberships == 0) {
free(*imop, M_IPMOPTS);
*imop = NULL;
}
return (error);
}
/*
* Return the IP multicast options in response to user getsockopt().
*/
New style sysctl & staticize alot of stuff.
1995-11-14 20:34:56 +00:00
static int
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
ip_getmoptions(sopt, imo)
struct sockopt *sopt;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
register struct ip_moptions *imo;
{
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
struct in_addr addr;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct in_ifaddr *ia;
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
int error, optval;
u_char coptval;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = 0;
switch (sopt->sopt_name) {
Kernel side of 3.5 multicast routing code, based on work by Bill Fenner and other work done here. The LKM support is probably broken, but it still compiles and will be fixed later.
1995-06-13 17:51:16 +00:00
case IP_MULTICAST_VIF:
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
if (imo != NULL)
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
optval = imo->imo_multicast_vif;
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
else
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
optval = -1;
error = sooptcopyout(sopt, &optval, sizeof optval);
break;
Initial get-the-easy-case-working upgrade of the multicast code to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
1994-09-06 22:42:31 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_MULTICAST_IF:
if (imo == NULL || imo->imo_multicast_ifp == NULL)
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
addr.s_addr = INADDR_ANY;
Sync with recent KAME. This work was based on kame-20010528-freebsd43-snap.tgz and some critical problem after the snap was out were fixed. There are many many changes since last KAME merge. TODO: - The definitions of SADB_* in sys/net/pfkeyv2.h are still different from RFC2407/IANA assignment because of binary compatibility issue. It should be fixed under 5-CURRENT. - ip6po_m member of struct ip6_pktopts is no longer used. But, it is still there because of binary compatibility issue. It should be removed under 5-CURRENT. Reviewed by: itojun Obtained from: KAME MFC after: 3 weeks
2001-06-11 12:39:29 +00:00
else if (imo->imo_multicast_addr.s_addr) {
/* return the value user has set */
addr = imo->imo_multicast_addr;
} else {
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
IFP_TO_IA(imo->imo_multicast_ifp, ia);
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
addr.s_addr = (ia == NULL) ? INADDR_ANY
: IA_SIN(ia)->sin_addr.s_addr;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = sooptcopyout(sopt, &addr, sizeof addr);
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_MULTICAST_TTL:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (imo == 0)
optval = coptval = IP_DEFAULT_MULTICAST_TTL;
else
optval = coptval = imo->imo_multicast_ttl;
if (sopt->sopt_valsize == 1)
error = sooptcopyout(sopt, &coptval, 1);
else
error = sooptcopyout(sopt, &optval, sizeof optval);
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case IP_MULTICAST_LOOP:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
if (imo == 0)
optval = coptval = IP_DEFAULT_MULTICAST_LOOP;
else
optval = coptval = imo->imo_multicast_loop;
if (sopt->sopt_valsize == 1)
error = sooptcopyout(sopt, &coptval, 1);
else
error = sooptcopyout(sopt, &optval, sizeof optval);
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
default:
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
error = ENOPROTOOPT;
break;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Yow! Completely change the way socket options are handled, eliminating another specialized mbuf type in the process. Also clean up some of the cruft surrounding IPFW, multicast routing, RSVP, and other ill-explored corners.
1998-08-23 03:07:17 +00:00
return (error);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
/*
* Discard the IP multicast options.
*/
void
ip_freemoptions(imo)
register struct ip_moptions *imo;
{
register int i;
if (imo != NULL) {
for (i = 0; i < imo->imo_num_memberships; ++i)
in_delmulti(imo->imo_membership[i]);
free(imo, M_IPMOPTS);
}
}
/*
* Routine called from ip_output() to loop back a copy of an IP multicast
* packet to the input queue of a specified interface. Note that this
* calls the output routine of the loopback "driver", but with an interface
Cleanup loopback interface support. Reviewed by: wollman
1995-04-26 18:10:58 +00:00
* pointer that might NOT be a loopback interface -- evil, but easier than
* replicating that code here.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
static void
Pull up the IP header in ip_mloopback(). This makes sure that the operations on the header inside ip_mloopback() are performed on a private copy instead of a shared cluster. PR: kern/3410
1997-05-06 21:22:04 +00:00
ip_mloopback(ifp, m, dst, hlen)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct ifnet *ifp;
register struct mbuf *m;
register struct sockaddr_in *dst;
Pull up the IP header in ip_mloopback(). This makes sure that the operations on the header inside ip_mloopback() are performed on a private copy instead of a shared cluster. PR: kern/3410
1997-05-06 21:22:04 +00:00
int hlen;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
register struct ip *ip;
struct mbuf *copym;
copym = m_copy(m, 0, M_COPYALL);
Pull up the IP header in ip_mloopback(). This makes sure that the operations on the header inside ip_mloopback() are performed on a private copy instead of a shared cluster. PR: kern/3410
1997-05-06 21:22:04 +00:00
if (copym != NULL && (copym->m_flags & M_EXT || copym->m_len < hlen))
copym = m_pullup(copym, hlen);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (copym != NULL) {
/*
* We don't bother to fragment if the IP length is greater
* than the interface's MTU. Can this possibly matter?
*/
ip = mtod(copym, struct ip *);
o Move NTOHL() and associated macros into <sys/param.h>. These are deprecated in favor of the POSIX-defined lowercase variants. o Change all occurrences of NTOHL() and associated marcros in the source tree to use the lowercase function variants. o Add missing license bits to sparc64's <machine/endian.h>. Approved by: jake o Clean up <machine/endian.h> files. o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>. o Remove prototypes for non-existent bswapXX() functions. o Include <machine/endian.h> in <arpa/inet.h> to define the POSIX-required ntohl() family of functions. o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>, and <sys/param.h>. o Prepend underscores to the ntohl() family to help deal with complexities associated with having MD (asm and inline) versions, and having to prevent exposure of these functions in other headers that happen to make use of endian-specific defines. o Create weak aliases to the canonical function name to help deal with third-party software forgetting to include an appropriate header. o Remove some now unneeded pollution from <sys/types.h>. o Add missing <arpa/inet.h> includes in userland. Tested on: alpha, i386 Reviewed by: bde, jake, tmm
2002-02-18 20:35:27 +00:00
ip->ip_len = htons(ip->ip_len);
ip->ip_off = htons(ip->ip_off);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
ip->ip_sum = 0;
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
if (ip->ip_vhl == IP_VHL_BORING) {
ip->ip_sum = in_cksum_hdr(ip);
} else {
Pull up the IP header in ip_mloopback(). This makes sure that the operations on the header inside ip_mloopback() are performed on a private copy instead of a shared cluster. PR: kern/3410
1997-05-06 21:22:04 +00:00
ip->ip_sum = in_cksum(copym, hlen);
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
}
/*
* NB:
Fix a comment and some commented-out code in ip_mloopback to reflect how multicast loopback really works.
1997-02-28 19:40:48 +00:00
* It's not clear whether there are any lingering
* reentrancy problems in other areas which might
* be exposed by using ip_input directly (in
* particular, everything which modifies the packet
* in-place). Yet another option is using the
* protosw directly to deliver the looped back
* packet. For the moment, we'll err on the side
Go through the loopback code with a broom.. Remove lots'o'hacks. looutput is now static. Other callers who want to use loopback to allow shortcutting should call the special entrypoint for this, if_simloop(), which is specifically designed for this purpose. Using looutput for this purpose was problematic, particularly with bpf and trying to keep track of whether one should be using the charateristics of the loopback interface or the interface (e.g. if_ethersubr.c) that was requesting the loopback. There was a whole class of errors due to this mis-use each of which had hacks to cover them up. Consists largly of hack removal :-)
1998-06-12 03:48:19 +00:00
* of safety by using if_simloop().
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
*/
Try narrow down the culprit sending undefined packet types through the loopback
1998-06-14 20:58:17 +00:00
#if 1 /* XXX */
if (dst->sin_family != AF_INET) {
fix another typo
1998-06-15 00:35:47 +00:00
printf("ip_mloopback: bad address family %d\n",
Try narrow down the culprit sending undefined packet types through the loopback
1998-06-14 20:58:17 +00:00
dst->sin_family);
dst->sin_family = AF_INET;
}
#endif
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
#ifdef notdef
Fix a comment and some commented-out code in ip_mloopback to reflect how multicast loopback really works.
1997-02-28 19:40:48 +00:00
copym->m_pkthdr.rcvif = ifp;
Go through the loopback code with a broom.. Remove lots'o'hacks. looutput is now static. Other callers who want to use loopback to allow shortcutting should call the special entrypoint for this, if_simloop(), which is specifically designed for this purpose. Using looutput for this purpose was problematic, particularly with bpf and trying to keep track of whether one should be using the charateristics of the loopback interface or the interface (e.g. if_ethersubr.c) that was requesting the loopback. There was a whole class of errors due to this mis-use each of which had hacks to cover them up. Consists largly of hack removal :-)
1998-06-12 03:48:19 +00:00
ip_input(copym);
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
#else
Mark the checksum as complete when looping back multicast packets. Submitted by: Jeff Gibbons <jgibbons@n2.net>
2000-05-25 02:27:14 +00:00
/* if the checksum hasn't been computed, mark it as valid */
if (copym->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
copym->m_pkthdr.csum_flags |=
CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
copym->m_pkthdr.csum_data = 0xffff;
}
Just need to pass the address family to if_simloop(), not the whole sockaddr.
2000-05-24 21:16:56 +00:00
if_simloop(ifp, copym, dst->sin_family, 0);
Three speed-ups in the output path (two small, one substantial): 1) Require all callers to pass a valid route pointer to ip_output() so that we don't have to check and allocate one off the stack as was done before. This eliminates one test and some stack bloat from the common (UDP and TCP) case. 2) Perform the IP header checksum in-line if it's of the usual length. This results in about a 5% speed-up in my packet-generation test. 3) Use ip_vhl field rather than ip_v and ip_hl bitfields.
1996-04-18 15:49:06 +00:00
#endif
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
}
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