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freebsd-dev/sys/netinet/in_pcb.c
Julian Elischer 8b07e49a00 Add code to allow the system to handle multiple routing tables. 
This particular implementation is designed to be fully backwards compatible
and to be MFC-able to 7.x (and 6.x)

Currently the only protocol that can make use of the multiple tables is IPv4
Similar functionality exists in OpenBSD and Linux.

From my notes:

-----

  One thing where FreeBSD has been falling behind, and which by chance I
  have some time to work on is "policy based routing", which allows
  different
  packet streams to be routed by more than just the destination address.

  Constraints:
  ------------

  I want to make some form of this available in the 6.x tree
  (and by extension 7.x) , but FreeBSD in general needs it so I might as
  well do it in -current and back port the portions I need.

  One of the ways that this can be done is to have the ability to
  instantiate multiple kernel routing tables (which I will now
  refer to as "Forwarding Information Bases" or "FIBs" for political
  correctness reasons). Which FIB a particular packet uses to make
  the next hop decision can be decided by a number of mechanisms.
  The policies these mechanisms implement are the "Policies" referred
  to in "Policy based routing".

  One of the constraints I have if I try to back port this work to
  6.x is that it must be implemented as a EXTENSION to the existing
  ABIs in 6.x so that third party applications do not need to be
  recompiled in timespan of the branch.

  This first version will not have some of the bells and whistles that
  will come with later versions. It will, for example, be limited to 16
  tables in the first commit.
  Implementation method, Compatible version. (part 1)
  -------------------------------
  For this reason I have implemented a "sufficient subset" of a
  multiple routing table solution in Perforce, and back-ported it
  to 6.x. (also in Perforce though not  always caught up with what I
  have done in -current/P4). The subset allows a number of FIBs
  to be defined at compile time (8 is sufficient for my purposes in 6.x)
  and implements the changes needed to allow IPV4 to use them. I have not
  done the changes for ipv6 simply because I do not need it, and I do not
  have enough knowledge of ipv6 (e.g. neighbor discovery) needed to do it.

  Other protocol families are left untouched and should there be
  users with proprietary protocol families, they should continue to work
  and be oblivious to the existence of the extra FIBs.

  To understand how this is done, one must know that the current FIB
  code starts everything off with a single dimensional array of
  pointers to FIB head structures (One per protocol family), each of
  which in turn points to the trie of routes available to that family.

  The basic change in the ABI compatible version of the change is to
  extent that array to be a 2 dimensional array, so that
  instead of protocol family X looking at rt_tables[X] for the
  table it needs, it looks at rt_tables[Y][X] when for all
  protocol families except ipv4 Y is always 0.
  Code that is unaware of the change always just sees the first row
  of the table, which of course looks just like the one dimensional
  array that existed before.

  The entry points rtrequest(), rtalloc(), rtalloc1(), rtalloc_ign()
  are all maintained, but refer only to the first row of the array,
  so that existing callers in proprietary protocols can continue to
  do the "right thing".
  Some new entry points are added, for the exclusive use of ipv4 code
  called in_rtrequest(), in_rtalloc(), in_rtalloc1() and in_rtalloc_ign(),
  which have an extra argument which refers the code to the correct row.

  In addition, there are some new entry points (currently called
  rtalloc_fib() and friends) that check the Address family being
  looked up and call either rtalloc() (and friends) if the protocol
  is not IPv4 forcing the action to row 0 or to the appropriate row
  if it IS IPv4 (and that info is available). These are for calling
  from code that is not specific to any particular protocol. The way
  these are implemented would change in the non ABI preserving code
  to be added later.

  One feature of the first version of the code is that for ipv4,
  the interface routes show up automatically on all the FIBs, so
  that no matter what FIB you select you always have the basic
  direct attached hosts available to you. (rtinit() does this
  automatically).

  You CAN delete an interface route from one FIB should you want
  to but by default it's there. ARP information is also available
  in each FIB. It's assumed that the same machine would have the
  same MAC address, regardless of which FIB you are using to get
  to it.

  This brings us as to how the correct FIB is selected for an outgoing
  IPV4 packet.

  Firstly, all packets have a FIB associated with them. if nothing
  has been done to change it, it will be FIB 0. The FIB is changed
  in the following ways.

  Packets fall into one of a number of classes.

  1/ locally generated packets, coming from a socket/PCB.
     Such packets select a FIB from a number associated with the
     socket/PCB. This in turn is inherited from the process,
     but can be changed by a socket option. The process in turn
     inherits it on fork. I have written a utility call setfib
     that acts a bit like nice..

         setfib -3 ping target.example.com # will use fib 3 for ping.

     It is an obvious extension to make it a property of a jail
     but I have not done so. It can be achieved by combining the setfib and
     jail commands.

  2/ packets received on an interface for forwarding.
     By default these packets would use table 0,
     (or possibly a number settable in a sysctl(not yet)).
     but prior to routing the firewall can inspect them (see below).
     (possibly in the future you may be able to associate a FIB
     with packets received on an interface..  An ifconfig arg, but not yet.)

  3/ packets inspected by a packet classifier, which can arbitrarily
     associate a fib with it on a packet by packet basis.
     A fib assigned to a packet by a packet classifier
     (such as ipfw) would over-ride a fib associated by
     a more default source. (such as cases 1 or 2).

  4/ a tcp listen socket associated with a fib will generate
     accept sockets that are associated with that same fib.

  5/ Packets generated in response to some other packet (e.g. reset
     or icmp packets). These should use the FIB associated with the
     packet being reponded to.

  6/ Packets generated during encapsulation.
     gif, tun and other tunnel interfaces will encapsulate using the FIB
     that was in effect withthe proces that set up the tunnel.
     thus setfib 1 ifconfig gif0 [tunnel instructions]
     will set the fib for the tunnel to use to be fib 1.

  Routing messages would be associated with their
  process, and thus select one FIB or another.
  messages from the kernel would be associated with the fib they
  refer to and would only be received by a routing socket associated
  with that fib. (not yet implemented)

  In addition Netstat has been edited to be able to cope with the
  fact that the array is now 2 dimensional. (It looks in system
  memory using libkvm (!)). Old versions of netstat see only the first FIB.

  In addition two sysctls are added to give:
  a) the number of FIBs compiled in (active)
  b) the default FIB of the calling process.

  Early testing experience:
  -------------------------

  Basically our (IronPort's) appliance does this functionality already
  using ipfw fwd but that method has some drawbacks.

  For example,
  It can't fully simulate a routing table because it can't influence the
  socket's choice of local address when a connect() is done.

  Testing during the generating of these changes has been
  remarkably smooth so far. Multiple tables have co-existed
  with no notable side effects, and packets have been routes
  accordingly.

  ipfw has grown 2 new keywords:

  setfib N ip from anay to any
  count ip from any to any fib N

  In pf there seems to be a requirement to be able to give symbolic names to the
  fibs but I do not have that capacity. I am not sure if it is required.

  SCTP has interestingly enough built in support for this, called VRFs
  in Cisco parlance. it will be interesting to see how that handles it
  when it suddenly actually does something.

  Where to next:
  --------------------

  After committing the ABI compatible version and MFCing it, I'd
  like to proceed in a forward direction in -current. this will
  result in some roto-tilling in the routing code.

  Firstly: the current code's idea of having a separate tree per
  protocol family, all of the same format, and pointed to by the
  1 dimensional array is a bit silly. Especially when one considers that
  there is code that makes assumptions about every protocol having the
  same internal structures there. Some protocols don't WANT that
  sort of structure. (for example the whole idea of a netmask is foreign
  to appletalk). This needs to be made opaque to the external code.

  My suggested first change is to add routing method pointers to the
  'domain' structure, along with information pointing the data.
  instead of having an array of pointers to uniform structures,
  there would be an array pointing to the 'domain' structures
  for each protocol address domain (protocol family),
  and the methods this reached would be called. The methods would have
  an argument that gives FIB number, but the protocol would be free
  to ignore it.

  When the ABI can be changed it raises the possibilty of the
  addition of a fib entry into the "struct route". Currently,
  the structure contains the sockaddr of the desination, and the resulting
  fib entry. To make this work fully, one could add a fib number
  so that given an address and a fib, one can find the third element, the
  fib entry.

  Interaction with the ARP layer/ LL layer would need to be
  revisited as well. Qing Li has been working on this already.

  This work was sponsored by Ironport Systems/Cisco

Reviewed by:    several including rwatson, bz and mlair (parts each)
Obtained from:  Ironport systems/Cisco
2008-05-09 23:03:00 +00:00

1504 lines
38 KiB
C
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/*-
* Copyright (c) 1982, 1986, 1991, 1993, 1995
* The Regents of the University of California.
* Copyright (c) 2007 Robert N. M. Watson
* 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.
* 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.
*
* @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_ddb.h"
#include "opt_ipsec.h"
#include "opt_inet6.h"
#include "opt_mac.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#ifdef DDB
#include <ddb/ddb.h>
#endif
#include <vm/uma.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#include <netinet/tcp_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#endif /* INET6 */
#ifdef IPSEC
#include <netipsec/ipsec.h>
#include <netipsec/key.h>
#endif /* IPSEC */
#include <security/mac/mac_framework.h>
/*
* These configure the range of local port addresses assigned to
* "unspecified" outgoing connections/packets/whatever.
*/
int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
int ipport_firstauto = IPPORT_EPHEMERALFIRST; /* 10000 */
int ipport_lastauto = IPPORT_EPHEMERALLAST; /* 65535 */
int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */
/*
* Reserved ports accessible only to root. There are significant
* security considerations that must be accounted for when changing these,
* but the security benefits can be great. Please be careful.
*/
int ipport_reservedhigh = IPPORT_RESERVED - 1; /* 1023 */
int ipport_reservedlow = 0;
/* Variables dealing with random ephemeral port allocation. */
int ipport_randomized = 1; /* user controlled via sysctl */
int ipport_randomcps = 10; /* user controlled via sysctl */
int ipport_randomtime = 45; /* user controlled via sysctl */
int ipport_stoprandom = 0; /* toggled by ipport_tick */
int ipport_tcpallocs;
int ipport_tcplastcount;
#define RANGECHK(var, min, max) \
if ((var) < (min)) { (var) = (min); } \
else if ((var) > (max)) { (var) = (max); }
static int
sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
{
int error;
error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
if (error == 0) {
RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
RANGECHK(ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
RANGECHK(ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
RANGECHK(ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);
}
return (error);
}
#undef RANGECHK
SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
&ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
&ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
&ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
&ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
&ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
&ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh,
CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedhigh, 0, "");
SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow,
CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedlow, 0, "");
SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized, CTLFLAG_RW,
&ipport_randomized, 0, "Enable random port allocation");
SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomcps, CTLFLAG_RW,
&ipport_randomcps, 0, "Maximum number of random port "
"allocations before switching to a sequental one");
SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomtime, CTLFLAG_RW,
&ipport_randomtime, 0, "Minimum time to keep sequental port "
"allocation before switching to a random one");
/*
* in_pcb.c: manage the Protocol Control Blocks.
*
* NOTE: It is assumed that most of these functions will be called with
* the pcbinfo lock held, and often, the inpcb lock held, as these utility
* functions often modify hash chains or addresses in pcbs.
*/
/*
* Allocate a PCB and associate it with the socket.
* On success return with the PCB locked.
*/
int
in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
{
struct inpcb *inp;
int error;
INP_INFO_WLOCK_ASSERT(pcbinfo);
error = 0;
inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT);
if (inp == NULL)
return (ENOBUFS);
bzero(inp, inp_zero_size);
inp->inp_pcbinfo = pcbinfo;
inp->inp_socket = so;
inp->inp_inc.inc_fibnum = so->so_fibnum;
#ifdef MAC
error = mac_inpcb_init(inp, M_NOWAIT);
if (error != 0)
goto out;
SOCK_LOCK(so);
mac_inpcb_create(so, inp);
SOCK_UNLOCK(so);
#endif
#ifdef IPSEC
error = ipsec_init_policy(so, &inp->inp_sp);
if (error != 0) {
#ifdef MAC
mac_inpcb_destroy(inp);
#endif
goto out;
}
#endif /*IPSEC*/
#ifdef INET6
if (INP_SOCKAF(so) == AF_INET6) {
inp->inp_vflag |= INP_IPV6PROTO;
if (ip6_v6only)
inp->inp_flags |= IN6P_IPV6_V6ONLY;
}
#endif
LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list);
pcbinfo->ipi_count++;
so->so_pcb = (caddr_t)inp;
#ifdef INET6
if (ip6_auto_flowlabel)
inp->inp_flags |= IN6P_AUTOFLOWLABEL;
#endif
INP_WLOCK(inp);
inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
#if defined(IPSEC) || defined(MAC)
out:
if (error != 0)
uma_zfree(pcbinfo->ipi_zone, inp);
#endif
return (error);
}
int
in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
{
int anonport, error;
INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
INP_WLOCK_ASSERT(inp);
if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
return (EINVAL);
anonport = inp->inp_lport == 0 && (nam == NULL ||
((struct sockaddr_in *)nam)->sin_port == 0);
error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr,
&inp->inp_lport, cred);
if (error)
return (error);
if (in_pcbinshash(inp) != 0) {
inp->inp_laddr.s_addr = INADDR_ANY;
inp->inp_lport = 0;
return (EAGAIN);
}
if (anonport)
inp->inp_flags |= INP_ANONPORT;
return (0);
}
/*
* Set up a bind operation on a PCB, performing port allocation
* as required, but do not actually modify the PCB. Callers can
* either complete the bind by setting inp_laddr/inp_lport and
* calling in_pcbinshash(), or they can just use the resulting
* port and address to authorise the sending of a once-off packet.
*
* On error, the values of *laddrp and *lportp are not changed.
*/
int
in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp,
u_short *lportp, struct ucred *cred)
{
struct socket *so = inp->inp_socket;
unsigned short *lastport;
struct sockaddr_in *sin;
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
struct in_addr laddr;
u_short lport = 0;
int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
int error, prison = 0;
int dorandom;
/*
* Because no actual state changes occur here, a write global write
* lock on the pcbinfo isn't required.
*/
INP_INFO_LOCK_ASSERT(pcbinfo);
INP_LOCK_ASSERT(inp);
if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
return (EADDRNOTAVAIL);
laddr.s_addr = *laddrp;
if (nam != NULL && laddr.s_addr != INADDR_ANY)
return (EINVAL);
if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
wild = INPLOOKUP_WILDCARD;
if (nam) {
sin = (struct sockaddr_in *)nam;
if (nam->sa_len != sizeof (*sin))
return (EINVAL);
#ifdef notdef
/*
* We should check the family, but old programs
* incorrectly fail to initialize it.
*/
if (sin->sin_family != AF_INET)
return (EAFNOSUPPORT);
#endif
if (sin->sin_addr.s_addr != INADDR_ANY)
if (prison_ip(cred, 0, &sin->sin_addr.s_addr))
return(EINVAL);
if (sin->sin_port != *lportp) {
/* Don't allow the port to change. */
if (*lportp != 0)
return (EINVAL);
lport = sin->sin_port;
}
/* NB: lport is left as 0 if the port isn't being changed. */
if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
/*
* Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
* allow complete duplication of binding if
* SO_REUSEPORT is set, or if SO_REUSEADDR is set
* and a multicast address is bound on both
* new and duplicated sockets.
*/
if (so->so_options & SO_REUSEADDR)
reuseport = SO_REUSEADDR|SO_REUSEPORT;
} else if (sin->sin_addr.s_addr != INADDR_ANY) {
sin->sin_port = 0; /* yech... */
bzero(&sin->sin_zero, sizeof(sin->sin_zero));
if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
return (EADDRNOTAVAIL);
}
laddr = sin->sin_addr;
if (lport) {
struct inpcb *t;
struct tcptw *tw;
/* GROSS */
if (ntohs(lport) <= ipport_reservedhigh &&
ntohs(lport) >= ipport_reservedlow &&
priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
0))
return (EACCES);
if (jailed(cred))
prison = 1;
if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
priv_check_cred(so->so_cred,
PRIV_NETINET_REUSEPORT, 0) != 0) {
t = in_pcblookup_local(inp->inp_pcbinfo,
sin->sin_addr, lport,
prison ? 0 : INPLOOKUP_WILDCARD);
/*
* XXX
* This entire block sorely needs a rewrite.
*/
if (t &&
((t->inp_vflag & INP_TIMEWAIT) == 0) &&
(so->so_type != SOCK_STREAM ||
ntohl(t->inp_faddr.s_addr) == INADDR_ANY) &&
(ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
(t->inp_socket->so_options &
SO_REUSEPORT) == 0) &&
(so->so_cred->cr_uid !=
t->inp_socket->so_cred->cr_uid))
return (EADDRINUSE);
}
if (prison && prison_ip(cred, 0, &sin->sin_addr.s_addr))
return (EADDRNOTAVAIL);
t = in_pcblookup_local(pcbinfo, sin->sin_addr,
lport, prison ? 0 : wild);
if (t && (t->inp_vflag & INP_TIMEWAIT)) {
/*
* XXXRW: If an incpb has had its timewait
* state recycled, we treat the address as
* being in use (for now). This is better
* than a panic, but not desirable.
*/
tw = intotw(inp);
if (tw == NULL ||
(reuseport & tw->tw_so_options) == 0)
return (EADDRINUSE);
} else if (t &&
(reuseport & t->inp_socket->so_options) == 0) {
#ifdef INET6
if (ntohl(sin->sin_addr.s_addr) !=
INADDR_ANY ||
ntohl(t->inp_laddr.s_addr) !=
INADDR_ANY ||
INP_SOCKAF(so) ==
INP_SOCKAF(t->inp_socket))
#endif
return (EADDRINUSE);
}
}
}
if (*lportp != 0)
lport = *lportp;
if (lport == 0) {
u_short first, last, aux;
int count;
if (laddr.s_addr != INADDR_ANY)
if (prison_ip(cred, 0, &laddr.s_addr))
return (EINVAL);
if (inp->inp_flags & INP_HIGHPORT) {
first = ipport_hifirstauto; /* sysctl */
last = ipport_hilastauto;
lastport = &pcbinfo->ipi_lasthi;
} else if (inp->inp_flags & INP_LOWPORT) {
error = priv_check_cred(cred,
PRIV_NETINET_RESERVEDPORT, 0);
if (error)
return error;
first = ipport_lowfirstauto; /* 1023 */
last = ipport_lowlastauto; /* 600 */
lastport = &pcbinfo->ipi_lastlow;
} else {
first = ipport_firstauto; /* sysctl */
last = ipport_lastauto;
lastport = &pcbinfo->ipi_lastport;
}
/*
* For UDP, use random port allocation as long as the user
* allows it. For TCP (and as of yet unknown) connections,
* use random port allocation only if the user allows it AND
* ipport_tick() allows it.
*/
if (ipport_randomized &&
(!ipport_stoprandom || pcbinfo == &udbinfo))
dorandom = 1;
else
dorandom = 0;
/*
* It makes no sense to do random port allocation if
* we have the only port available.
*/
if (first == last)
dorandom = 0;
/* Make sure to not include UDP packets in the count. */
if (pcbinfo != &udbinfo)
ipport_tcpallocs++;
/*
* Simple check to ensure all ports are not used up causing
* a deadlock here.
*/
if (first > last) {
aux = first;
first = last;
last = aux;
}
if (dorandom)
*lastport = first +
(arc4random() % (last - first));
count = last - first;
do {
if (count-- < 0) /* completely used? */
return (EADDRNOTAVAIL);
++*lastport;
if (*lastport < first || *lastport > last)
*lastport = first;
lport = htons(*lastport);
} while (in_pcblookup_local(pcbinfo, laddr, lport,
wild));
}
if (prison_ip(cred, 0, &laddr.s_addr))
return (EINVAL);
*laddrp = laddr.s_addr;
*lportp = lport;
return (0);
}
/*
* Connect from a socket to a specified address.
* Both address and port must be specified in argument sin.
* If don't have a local address for this socket yet,
* then pick one.
*/
int
in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
{
u_short lport, fport;
in_addr_t laddr, faddr;
int anonport, error;
INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
INP_WLOCK_ASSERT(inp);
lport = inp->inp_lport;
laddr = inp->inp_laddr.s_addr;
anonport = (lport == 0);
error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport,
NULL, cred);
if (error)
return (error);
/* Do the initial binding of the local address if required. */
if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) {
inp->inp_lport = lport;
inp->inp_laddr.s_addr = laddr;
if (in_pcbinshash(inp) != 0) {
inp->inp_laddr.s_addr = INADDR_ANY;
inp->inp_lport = 0;
return (EAGAIN);
}
}
/* Commit the remaining changes. */
inp->inp_lport = lport;
inp->inp_laddr.s_addr = laddr;
inp->inp_faddr.s_addr = faddr;
inp->inp_fport = fport;
in_pcbrehash(inp);
if (anonport)
inp->inp_flags |= INP_ANONPORT;
return (0);
}
/*
* Set up for a connect from a socket to the specified address.
* On entry, *laddrp and *lportp should contain the current local
* address and port for the PCB; these are updated to the values
* that should be placed in inp_laddr and inp_lport to complete
* the connect.
*
* On success, *faddrp and *fportp will be set to the remote address
* and port. These are not updated in the error case.
*
* If the operation fails because the connection already exists,
* *oinpp will be set to the PCB of that connection so that the
* caller can decide to override it. In all other cases, *oinpp
* is set to NULL.
*/
int
in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam,
in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp,
struct inpcb **oinpp, struct ucred *cred)
{
struct sockaddr_in *sin = (struct sockaddr_in *)nam;
struct in_ifaddr *ia;
struct sockaddr_in sa;
struct ucred *socred;
struct inpcb *oinp;
struct in_addr laddr, faddr;
u_short lport, fport;
int error;
/*
* Because a global state change doesn't actually occur here, a read
* lock is sufficient.
*/
INP_INFO_LOCK_ASSERT(inp->inp_pcbinfo);
INP_LOCK_ASSERT(inp);
if (oinpp != NULL)
*oinpp = NULL;
if (nam->sa_len != sizeof (*sin))
return (EINVAL);
if (sin->sin_family != AF_INET)
return (EAFNOSUPPORT);
if (sin->sin_port == 0)
return (EADDRNOTAVAIL);
laddr.s_addr = *laddrp;
lport = *lportp;
faddr = sin->sin_addr;
fport = sin->sin_port;
socred = inp->inp_socket->so_cred;
if (laddr.s_addr == INADDR_ANY && jailed(socred)) {
bzero(&sa, sizeof(sa));
sa.sin_addr.s_addr = htonl(prison_getip(socred));
sa.sin_len = sizeof(sa);
sa.sin_family = AF_INET;
error = in_pcbbind_setup(inp, (struct sockaddr *)&sa,
&laddr.s_addr, &lport, cred);
if (error)
return (error);
}
if (!TAILQ_EMPTY(&in_ifaddrhead)) {
/*
* If the destination address is INADDR_ANY,
* use the primary local address.
* If the supplied address is INADDR_BROADCAST,
* and the primary interface supports broadcast,
* choose the broadcast address for that interface.
*/
if (faddr.s_addr == INADDR_ANY)
faddr = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr;
else if (faddr.s_addr == (u_long)INADDR_BROADCAST &&
(TAILQ_FIRST(&in_ifaddrhead)->ia_ifp->if_flags &
IFF_BROADCAST))
faddr = satosin(&TAILQ_FIRST(
&in_ifaddrhead)->ia_broadaddr)->sin_addr;
}
if (laddr.s_addr == INADDR_ANY) {
ia = (struct in_ifaddr *)0;
/*
* If route is known our src addr is taken from the i/f,
* else punt.
*
* Find out route to destination
*/
if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0)
ia = ip_rtaddr(faddr, inp->inp_inc.inc_fibnum);
/*
* If we found a route, use the address corresponding to
* the outgoing interface.
*
* Otherwise assume faddr is reachable on a directly connected
* network and try to find a corresponding interface to take
* the source address from.
*/
if (ia == 0) {
bzero(&sa, sizeof(sa));
sa.sin_addr = faddr;
sa.sin_len = sizeof(sa);
sa.sin_family = AF_INET;
ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sa)));
if (ia == 0)
ia = ifatoia(ifa_ifwithnet(sintosa(&sa)));
if (ia == 0)
return (ENETUNREACH);
}
/*
* If the destination address is multicast and an outgoing
* interface has been set as a multicast option, use the
* address of that interface as our source address.
*/
if (IN_MULTICAST(ntohl(faddr.s_addr)) &&
inp->inp_moptions != NULL) {
struct ip_moptions *imo;
struct ifnet *ifp;
imo = inp->inp_moptions;
if (imo->imo_multicast_ifp != NULL) {
ifp = imo->imo_multicast_ifp;
TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
if (ia->ia_ifp == ifp)
break;
if (ia == 0)
return (EADDRNOTAVAIL);
}
}
laddr = ia->ia_addr.sin_addr;
}
oinp = in_pcblookup_hash(inp->inp_pcbinfo, faddr, fport, laddr, lport,
0, NULL);
if (oinp != NULL) {
if (oinpp != NULL)
*oinpp = oinp;
return (EADDRINUSE);
}
if (lport == 0) {
error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport,
cred);
if (error)
return (error);
}
*laddrp = laddr.s_addr;
*lportp = lport;
*faddrp = faddr.s_addr;
*fportp = fport;
return (0);
}
void
in_pcbdisconnect(struct inpcb *inp)
{
INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
INP_WLOCK_ASSERT(inp);
inp->inp_faddr.s_addr = INADDR_ANY;
inp->inp_fport = 0;
in_pcbrehash(inp);
}
/*
* In the old world order, in_pcbdetach() served two functions: to detach the
* pcb from the socket/potentially free the socket, and to free the pcb
* itself. In the new world order, the protocol code is responsible for
* managing the relationship with the socket, and this code simply frees the
* pcb.
*/
void
in_pcbdetach(struct inpcb *inp)
{
KASSERT(inp->inp_socket != NULL, ("in_pcbdetach: inp_socket == NULL"));
inp->inp_socket->so_pcb = NULL;
inp->inp_socket = NULL;
}
void
in_pcbfree(struct inpcb *inp)
{
struct inpcbinfo *ipi = inp->inp_pcbinfo;
KASSERT(inp->inp_socket == NULL, ("in_pcbfree: inp_socket != NULL"));
INP_INFO_WLOCK_ASSERT(ipi);
INP_WLOCK_ASSERT(inp);
#ifdef IPSEC
ipsec4_delete_pcbpolicy(inp);
#endif /*IPSEC*/
inp->inp_gencnt = ++ipi->ipi_gencnt;
in_pcbremlists(inp);
if (inp->inp_options)
(void)m_free(inp->inp_options);
if (inp->inp_moptions != NULL)
inp_freemoptions(inp->inp_moptions);
inp->inp_vflag = 0;
#ifdef MAC
mac_inpcb_destroy(inp);
#endif
INP_WUNLOCK(inp);
uma_zfree(ipi->ipi_zone, inp);
}
/*
* TCP needs to maintain its inpcb structure after the TCP connection has
* been torn down. However, it must be disconnected from the inpcb hashes as
* it must not prevent binding of future connections to the same port/ip
* combination by other inpcbs.
*/
void
in_pcbdrop(struct inpcb *inp)
{
INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
INP_WLOCK_ASSERT(inp);
inp->inp_vflag |= INP_DROPPED;
if (inp->inp_lport) {
struct inpcbport *phd = inp->inp_phd;
LIST_REMOVE(inp, inp_hash);
LIST_REMOVE(inp, inp_portlist);
if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
LIST_REMOVE(phd, phd_hash);
free(phd, M_PCB);
}
inp->inp_lport = 0;
}
}
/*
* Common routines to return the socket addresses associated with inpcbs.
*/
struct sockaddr *
in_sockaddr(in_port_t port, struct in_addr *addr_p)
{
struct sockaddr_in *sin;
MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
M_WAITOK | M_ZERO);
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_addr = *addr_p;
sin->sin_port = port;
return (struct sockaddr *)sin;
}
int
in_getsockaddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp;
struct in_addr addr;
in_port_t port;
inp = sotoinpcb(so);
KASSERT(inp != NULL, ("in_getsockaddr: inp == NULL"));
INP_RLOCK(inp);
port = inp->inp_lport;
addr = inp->inp_laddr;
INP_RUNLOCK(inp);
*nam = in_sockaddr(port, &addr);
return 0;
}
int
in_getpeeraddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp;
struct in_addr addr;
in_port_t port;
inp = sotoinpcb(so);
KASSERT(inp != NULL, ("in_getpeeraddr: inp == NULL"));
INP_RLOCK(inp);
port = inp->inp_fport;
addr = inp->inp_faddr;
INP_RUNLOCK(inp);
*nam = in_sockaddr(port, &addr);
return 0;
}
void
in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno,
struct inpcb *(*notify)(struct inpcb *, int))
{
struct inpcb *inp, *inp_temp;
INP_INFO_WLOCK(pcbinfo);
LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
INP_WLOCK(inp);
#ifdef INET6
if ((inp->inp_vflag & INP_IPV4) == 0) {
INP_WUNLOCK(inp);
continue;
}
#endif
if (inp->inp_faddr.s_addr != faddr.s_addr ||
inp->inp_socket == NULL) {
INP_WUNLOCK(inp);
continue;
}
if ((*notify)(inp, errno))
INP_WUNLOCK(inp);
}
INP_INFO_WUNLOCK(pcbinfo);
}
void
in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
{
struct inpcb *inp;
struct ip_moptions *imo;
int i, gap;
INP_INFO_RLOCK(pcbinfo);
LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
INP_WLOCK(inp);
imo = inp->inp_moptions;
if ((inp->inp_vflag & INP_IPV4) &&
imo != NULL) {
/*
* Unselect the outgoing interface if it is being
* detached.
*/
if (imo->imo_multicast_ifp == ifp)
imo->imo_multicast_ifp = NULL;
/*
* Drop multicast group membership if we joined
* through the interface being detached.
*/
for (i = 0, gap = 0; i < imo->imo_num_memberships;
i++) {
if (imo->imo_membership[i]->inm_ifp == ifp) {
in_delmulti(imo->imo_membership[i]);
gap++;
} else if (gap != 0)
imo->imo_membership[i - gap] =
imo->imo_membership[i];
}
imo->imo_num_memberships -= gap;
}
INP_WUNLOCK(inp);
}
INP_INFO_RUNLOCK(pcbinfo);
}
/*
* Lookup a PCB based on the local address and port.
*/
#define INP_LOOKUP_MAPPED_PCB_COST 3
struct inpcb *
in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
u_int lport_arg, int wild_okay)
{
struct inpcb *inp;
#ifdef INET6
int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST;
#else
int matchwild = 3;
#endif
int wildcard;
u_short lport = lport_arg;
INP_INFO_LOCK_ASSERT(pcbinfo);
if (!wild_okay) {
struct inpcbhead *head;
/*
* Look for an unconnected (wildcard foreign addr) PCB that
* matches the local address and port we're looking for.
*/
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
0, pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
#ifdef INET6
if ((inp->inp_vflag & INP_IPV4) == 0)
continue;
#endif
if (inp->inp_faddr.s_addr == INADDR_ANY &&
inp->inp_laddr.s_addr == laddr.s_addr &&
inp->inp_lport == lport) {
/*
* Found.
*/
return (inp);
}
}
/*
* Not found.
*/
return (NULL);
} else {
struct inpcbporthead *porthash;
struct inpcbport *phd;
struct inpcb *match = NULL;
/*
* Best fit PCB lookup.
*
* First see if this local port is in use by looking on the
* port hash list.
*/
porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
pcbinfo->ipi_porthashmask)];
LIST_FOREACH(phd, porthash, phd_hash) {
if (phd->phd_port == lport)
break;
}
if (phd != NULL) {
/*
* Port is in use by one or more PCBs. Look for best
* fit.
*/
LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
wildcard = 0;
#ifdef INET6
if ((inp->inp_vflag & INP_IPV4) == 0)
continue;
/*
* We never select the PCB that has
* INP_IPV6 flag and is bound to :: if
* we have another PCB which is bound
* to 0.0.0.0. If a PCB has the
* INP_IPV6 flag, then we set its cost
* higher than IPv4 only PCBs.
*
* Note that the case only happens
* when a socket is bound to ::, under
* the condition that the use of the
* mapped address is allowed.
*/
if ((inp->inp_vflag & INP_IPV6) != 0)
wildcard += INP_LOOKUP_MAPPED_PCB_COST;
#endif
if (inp->inp_faddr.s_addr != INADDR_ANY)
wildcard++;
if (inp->inp_laddr.s_addr != INADDR_ANY) {
if (laddr.s_addr == INADDR_ANY)
wildcard++;
else if (inp->inp_laddr.s_addr != laddr.s_addr)
continue;
} else {
if (laddr.s_addr != INADDR_ANY)
wildcard++;
}
if (wildcard < matchwild) {
match = inp;
matchwild = wildcard;
if (matchwild == 0) {
break;
}
}
}
}
return (match);
}
}
#undef INP_LOOKUP_MAPPED_PCB_COST
/*
* Lookup PCB in hash list.
*/
struct inpcb *
in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
u_int fport_arg, struct in_addr laddr, u_int lport_arg, int wildcard,
struct ifnet *ifp)
{
struct inpcbhead *head;
struct inpcb *inp;
u_short fport = fport_arg, lport = lport_arg;
INP_INFO_LOCK_ASSERT(pcbinfo);
/*
* First look for an exact match.
*/
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
#ifdef INET6
if ((inp->inp_vflag & INP_IPV4) == 0)
continue;
#endif
if (inp->inp_faddr.s_addr == faddr.s_addr &&
inp->inp_laddr.s_addr == laddr.s_addr &&
inp->inp_fport == fport &&
inp->inp_lport == lport)
return (inp);
}
/*
* Then look for a wildcard match, if requested.
*/
if (wildcard) {
struct inpcb *local_wild = NULL;
#ifdef INET6
struct inpcb *local_wild_mapped = NULL;
#endif
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
0, pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
#ifdef INET6
if ((inp->inp_vflag & INP_IPV4) == 0)
continue;
#endif
if (inp->inp_faddr.s_addr == INADDR_ANY &&
inp->inp_lport == lport) {
if (ifp && ifp->if_type == IFT_FAITH &&
(inp->inp_flags & INP_FAITH) == 0)
continue;
if (inp->inp_laddr.s_addr == laddr.s_addr)
return (inp);
else if (inp->inp_laddr.s_addr == INADDR_ANY) {
#ifdef INET6
if (INP_CHECK_SOCKAF(inp->inp_socket,
AF_INET6))
local_wild_mapped = inp;
else
#endif
local_wild = inp;
}
}
}
#ifdef INET6
if (local_wild == NULL)
return (local_wild_mapped);
#endif
return (local_wild);
}
return (NULL);
}
/*
* Insert PCB onto various hash lists.
*/
int
in_pcbinshash(struct inpcb *inp)
{
struct inpcbhead *pcbhash;
struct inpcbporthead *pcbporthash;
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
struct inpcbport *phd;
u_int32_t hashkey_faddr;
INP_INFO_WLOCK_ASSERT(pcbinfo);
INP_WLOCK_ASSERT(inp);
#ifdef INET6
if (inp->inp_vflag & INP_IPV6)
hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
else
#endif /* INET6 */
hashkey_faddr = inp->inp_faddr.s_addr;
pcbhash = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
pcbporthash = &pcbinfo->ipi_porthashbase[
INP_PCBPORTHASH(inp->inp_lport, pcbinfo->ipi_porthashmask)];
/*
* Go through port list and look for a head for this lport.
*/
LIST_FOREACH(phd, pcbporthash, phd_hash) {
if (phd->phd_port == inp->inp_lport)
break;
}
/*
* If none exists, malloc one and tack it on.
*/
if (phd == NULL) {
MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport), M_PCB, M_NOWAIT);
if (phd == NULL) {
return (ENOBUFS); /* XXX */
}
phd->phd_port = inp->inp_lport;
LIST_INIT(&phd->phd_pcblist);
LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
}
inp->inp_phd = phd;
LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
return (0);
}
/*
* Move PCB to the proper hash bucket when { faddr, fport } have been
* changed. NOTE: This does not handle the case of the lport changing (the
* hashed port list would have to be updated as well), so the lport must
* not change after in_pcbinshash() has been called.
*/
void
in_pcbrehash(struct inpcb *inp)
{
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
struct inpcbhead *head;
u_int32_t hashkey_faddr;
INP_INFO_WLOCK_ASSERT(pcbinfo);
INP_WLOCK_ASSERT(inp);
#ifdef INET6
if (inp->inp_vflag & INP_IPV6)
hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
else
#endif /* INET6 */
hashkey_faddr = inp->inp_faddr.s_addr;
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
LIST_REMOVE(inp, inp_hash);
LIST_INSERT_HEAD(head, inp, inp_hash);
}
/*
* Remove PCB from various lists.
*/
void
in_pcbremlists(struct inpcb *inp)
{
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
INP_INFO_WLOCK_ASSERT(pcbinfo);
INP_WLOCK_ASSERT(inp);
inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
if (inp->inp_lport) {
struct inpcbport *phd = inp->inp_phd;
LIST_REMOVE(inp, inp_hash);
LIST_REMOVE(inp, inp_portlist);
if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
LIST_REMOVE(phd, phd_hash);
free(phd, M_PCB);
}
}
LIST_REMOVE(inp, inp_list);
pcbinfo->ipi_count--;
}
/*
* A set label operation has occurred at the socket layer, propagate the
* label change into the in_pcb for the socket.
*/
void
in_pcbsosetlabel(struct socket *so)
{
#ifdef MAC
struct inpcb *inp;
inp = sotoinpcb(so);
KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL"));
INP_WLOCK(inp);
SOCK_LOCK(so);
mac_inpcb_sosetlabel(so, inp);
SOCK_UNLOCK(so);
INP_WUNLOCK(inp);
#endif
}
/*
* ipport_tick runs once per second, determining if random port allocation
* should be continued. If more than ipport_randomcps ports have been
* allocated in the last second, then we return to sequential port
* allocation. We return to random allocation only once we drop below
* ipport_randomcps for at least ipport_randomtime seconds.
*/
void
ipport_tick(void *xtp)
{
if (ipport_tcpallocs <= ipport_tcplastcount + ipport_randomcps) {
if (ipport_stoprandom > 0)
ipport_stoprandom--;
} else
ipport_stoprandom = ipport_randomtime;
ipport_tcplastcount = ipport_tcpallocs;
callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL);
}
void
inp_wlock(struct inpcb *inp)
{
INP_WLOCK(inp);
}
void
inp_wunlock(struct inpcb *inp)
{
INP_WUNLOCK(inp);
}
void
inp_rlock(struct inpcb *inp)
{
INP_RLOCK(inp);
}
void
inp_runlock(struct inpcb *inp)
{
INP_RUNLOCK(inp);
}
#ifdef INVARIANTS
void
inp_lock_assert(struct inpcb *inp)
{
INP_WLOCK_ASSERT(inp);
}
void
inp_unlock_assert(struct inpcb *inp)
{
INP_UNLOCK_ASSERT(inp);
}
#endif
#ifdef DDB
static void
db_print_indent(int indent)
{
int i;
for (i = 0; i < indent; i++)
db_printf(" ");
}
static void
db_print_inconninfo(struct in_conninfo *inc, const char *name, int indent)
{
char faddr_str[48], laddr_str[48];
db_print_indent(indent);
db_printf("%s at %p\n", name, inc);
indent += 2;
#ifdef INET6
if (inc->inc_flags == 1) {
/* IPv6. */
ip6_sprintf(laddr_str, &inc->inc6_laddr);
ip6_sprintf(faddr_str, &inc->inc6_faddr);
} else {
#endif
/* IPv4. */
inet_ntoa_r(inc->inc_laddr, laddr_str);
inet_ntoa_r(inc->inc_faddr, faddr_str);
#ifdef INET6
}
#endif
db_print_indent(indent);
db_printf("inc_laddr %s inc_lport %u\n", laddr_str,
ntohs(inc->inc_lport));
db_print_indent(indent);
db_printf("inc_faddr %s inc_fport %u\n", faddr_str,
ntohs(inc->inc_fport));
}
static void
db_print_inpflags(int inp_flags)
{
int comma;
comma = 0;
if (inp_flags & INP_RECVOPTS) {
db_printf("%sINP_RECVOPTS", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_RECVRETOPTS) {
db_printf("%sINP_RECVRETOPTS", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_RECVDSTADDR) {
db_printf("%sINP_RECVDSTADDR", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_HDRINCL) {
db_printf("%sINP_HDRINCL", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_HIGHPORT) {
db_printf("%sINP_HIGHPORT", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_LOWPORT) {
db_printf("%sINP_LOWPORT", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_ANONPORT) {
db_printf("%sINP_ANONPORT", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_RECVIF) {
db_printf("%sINP_RECVIF", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_MTUDISC) {
db_printf("%sINP_MTUDISC", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_FAITH) {
db_printf("%sINP_FAITH", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_RECVTTL) {
db_printf("%sINP_RECVTTL", comma ? ", " : "");
comma = 1;
}
if (inp_flags & INP_DONTFRAG) {
db_printf("%sINP_DONTFRAG", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_IPV6_V6ONLY) {
db_printf("%sIN6P_IPV6_V6ONLY", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_PKTINFO) {
db_printf("%sIN6P_PKTINFO", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_HOPLIMIT) {
db_printf("%sIN6P_HOPLIMIT", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_HOPOPTS) {
db_printf("%sIN6P_HOPOPTS", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_DSTOPTS) {
db_printf("%sIN6P_DSTOPTS", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_RTHDR) {
db_printf("%sIN6P_RTHDR", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_RTHDRDSTOPTS) {
db_printf("%sIN6P_RTHDRDSTOPTS", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_TCLASS) {
db_printf("%sIN6P_TCLASS", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_AUTOFLOWLABEL) {
db_printf("%sIN6P_AUTOFLOWLABEL", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_RFC2292) {
db_printf("%sIN6P_RFC2292", comma ? ", " : "");
comma = 1;
}
if (inp_flags & IN6P_MTU) {
db_printf("IN6P_MTU%s", comma ? ", " : "");
comma = 1;
}
}
static void
db_print_inpvflag(u_char inp_vflag)
{
int comma;
comma = 0;
if (inp_vflag & INP_IPV4) {
db_printf("%sINP_IPV4", comma ? ", " : "");
comma = 1;
}
if (inp_vflag & INP_IPV6) {
db_printf("%sINP_IPV6", comma ? ", " : "");
comma = 1;
}
if (inp_vflag & INP_IPV6PROTO) {
db_printf("%sINP_IPV6PROTO", comma ? ", " : "");
comma = 1;
}
if (inp_vflag & INP_TIMEWAIT) {
db_printf("%sINP_TIMEWAIT", comma ? ", " : "");
comma = 1;
}
if (inp_vflag & INP_ONESBCAST) {
db_printf("%sINP_ONESBCAST", comma ? ", " : "");
comma = 1;
}
if (inp_vflag & INP_DROPPED) {
db_printf("%sINP_DROPPED", comma ? ", " : "");
comma = 1;
}
if (inp_vflag & INP_SOCKREF) {
db_printf("%sINP_SOCKREF", comma ? ", " : "");
comma = 1;
}
}
void
db_print_inpcb(struct inpcb *inp, const char *name, int indent)
{
db_print_indent(indent);
db_printf("%s at %p\n", name, inp);
indent += 2;
db_print_indent(indent);
db_printf("inp_flow: 0x%x\n", inp->inp_flow);
db_print_inconninfo(&inp->inp_inc, "inp_conninfo", indent);
db_print_indent(indent);
db_printf("inp_ppcb: %p inp_pcbinfo: %p inp_socket: %p\n",
inp->inp_ppcb, inp->inp_pcbinfo, inp->inp_socket);
db_print_indent(indent);
db_printf("inp_label: %p inp_flags: 0x%x (",
inp->inp_label, inp->inp_flags);
db_print_inpflags(inp->inp_flags);
db_printf(")\n");
db_print_indent(indent);
db_printf("inp_sp: %p inp_vflag: 0x%x (", inp->inp_sp,
inp->inp_vflag);
db_print_inpvflag(inp->inp_vflag);
db_printf(")\n");
db_print_indent(indent);
db_printf("inp_ip_ttl: %d inp_ip_p: %d inp_ip_minttl: %d\n",
inp->inp_ip_ttl, inp->inp_ip_p, inp->inp_ip_minttl);
db_print_indent(indent);
#ifdef INET6
if (inp->inp_vflag & INP_IPV6) {
db_printf("in6p_options: %p in6p_outputopts: %p "
"in6p_moptions: %p\n", inp->in6p_options,
inp->in6p_outputopts, inp->in6p_moptions);
db_printf("in6p_icmp6filt: %p in6p_cksum %d "
"in6p_hops %u\n", inp->in6p_icmp6filt, inp->in6p_cksum,
inp->in6p_hops);
} else
#endif
{
db_printf("inp_ip_tos: %d inp_ip_options: %p "
"inp_ip_moptions: %p\n", inp->inp_ip_tos,
inp->inp_options, inp->inp_moptions);
}
db_print_indent(indent);
db_printf("inp_phd: %p inp_gencnt: %ju\n", inp->inp_phd,
(uintmax_t)inp->inp_gencnt);
}
DB_SHOW_COMMAND(inpcb, db_show_inpcb)
{
struct inpcb *inp;
if (!have_addr) {
db_printf("usage: show inpcb <addr>\n");
return;
}
inp = (struct inpcb *)addr;
db_print_inpcb(inp, "inpcb", 0);
}
#endif
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