6e6b3f7cbc
1. separating L2 tables (ARP, NDP) from the L3 routing tables
2. removing as much locking dependencies among these layers as
possible to allow for some parallelism in the search operations
3. simplify the logic in the routing code,
The most notable end result is the obsolescent of the route
cloning (RTF_CLONING) concept, which translated into code reduction
in both IPv4 ARP and IPv6 NDP related modules, and size reduction in
struct rtentry{}. The change in design obsoletes the semantics of
RTF_CLONING, RTF_WASCLONE and RTF_LLINFO routing flags. The userland
applications such as "arp" and "ndp" have been modified to reflect
those changes. The output from "netstat -r" shows only the routing
entries.
Quite a few developers have contributed to this project in the
past: Glebius Smirnoff, Luigi Rizzo, Alessandro Cerri, and
Andre Oppermann. And most recently:
- Kip Macy revised the locking code completely, thus completing
the last piece of the puzzle, Kip has also been conducting
active functional testing
- Sam Leffler has helped me improving/refactoring the code, and
provided valuable reviews
- Julian Elischer setup the perforce tree for me and has helped
me maintaining that branch before the svn conversion
401 lines
10 KiB
C
401 lines
10 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in_proto.c 8.2 (Berkeley) 2/9/95
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ipx.h"
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#include "opt_mrouting.h"
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#include "opt_ipsec.h"
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#include "opt_inet6.h"
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#include "opt_pf.h"
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#include "opt_carp.h"
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#include "opt_sctp.h"
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#include "opt_mpath.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/domain.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/queue.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/route.h>
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#ifdef RADIX_MPATH
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#include <net/radix_mpath.h>
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#endif
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/igmp_var.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/ip_encap.h>
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/*
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* TCP/IP protocol family: IP, ICMP, UDP, TCP.
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*/
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static struct pr_usrreqs nousrreqs;
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#ifdef IPSEC
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#include <netipsec/ipsec.h>
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#endif /* IPSEC */
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#ifdef SCTP
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#include <netinet/in_pcb.h>
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#include <netinet/sctp_pcb.h>
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#include <netinet/sctp.h>
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#include <netinet/sctp_var.h>
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#endif /* SCTP */
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#ifdef DEV_PFSYNC
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#include <net/pfvar.h>
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#include <net/if_pfsync.h>
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#endif
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#ifdef DEV_CARP
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#include <netinet/ip_carp.h>
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#endif
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extern struct domain inetdomain;
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/* Spacer for loadable protocols. */
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#define IPPROTOSPACER \
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{ \
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.pr_domain = &inetdomain, \
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.pr_protocol = PROTO_SPACER, \
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.pr_usrreqs = &nousrreqs \
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}
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struct protosw inetsw[] = {
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{
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.pr_type = 0,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IP,
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.pr_init = ip_init,
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.pr_slowtimo = ip_slowtimo,
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.pr_drain = ip_drain,
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.pr_usrreqs = &nousrreqs
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},
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{
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.pr_type = SOCK_DGRAM,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_UDP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = udp_input,
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.pr_ctlinput = udp_ctlinput,
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.pr_ctloutput = ip_ctloutput,
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.pr_init = udp_init,
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.pr_usrreqs = &udp_usrreqs
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},
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{
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.pr_type = SOCK_STREAM,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_TCP,
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.pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
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.pr_input = tcp_input,
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.pr_ctlinput = tcp_ctlinput,
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.pr_ctloutput = tcp_ctloutput,
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.pr_init = tcp_init,
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.pr_slowtimo = tcp_slowtimo,
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.pr_drain = tcp_drain,
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.pr_usrreqs = &tcp_usrreqs
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},
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#ifdef SCTP
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{
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.pr_type = SOCK_DGRAM,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_SCTP,
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.pr_flags = PR_WANTRCVD,
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.pr_input = sctp_input,
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.pr_ctlinput = sctp_ctlinput,
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.pr_ctloutput = sctp_ctloutput,
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.pr_init = sctp_init,
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.pr_drain = sctp_drain,
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.pr_usrreqs = &sctp_usrreqs
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},
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{
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.pr_type = SOCK_SEQPACKET,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_SCTP,
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.pr_flags = PR_WANTRCVD,
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.pr_input = sctp_input,
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.pr_ctlinput = sctp_ctlinput,
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.pr_ctloutput = sctp_ctloutput,
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.pr_drain = sctp_drain,
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.pr_usrreqs = &sctp_usrreqs
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},
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{
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.pr_type = SOCK_STREAM,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_SCTP,
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.pr_flags = PR_WANTRCVD,
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.pr_input = sctp_input,
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.pr_ctlinput = sctp_ctlinput,
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.pr_ctloutput = sctp_ctloutput,
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.pr_drain = sctp_drain,
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.pr_usrreqs = &sctp_usrreqs
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},
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#endif /* SCTP */
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_RAW,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = rip_input,
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.pr_ctlinput = rip_ctlinput,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_ICMP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = icmp_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = icmp_init,
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.pr_usrreqs = &rip_usrreqs
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IGMP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = igmp_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = igmp_init,
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.pr_fasttimo = igmp_fasttimo,
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.pr_slowtimo = igmp_slowtimo,
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.pr_usrreqs = &rip_usrreqs
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_RSVP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = rsvp_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs
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},
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#ifdef IPSEC
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_AH,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ah4_input,
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.pr_ctlinput = ah4_ctlinput,
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.pr_usrreqs = &nousrreqs
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_ESP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = esp4_input,
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.pr_ctlinput = esp4_ctlinput,
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.pr_usrreqs = &nousrreqs
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IPCOMP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = ipcomp4_input,
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.pr_usrreqs = &nousrreqs
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},
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#endif /* IPSEC */
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IPV4,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = encap_init,
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.pr_usrreqs = &rip_usrreqs
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_MOBILE,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = encap_init,
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.pr_usrreqs = &rip_usrreqs
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_ETHERIP,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = encap_init,
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.pr_usrreqs = &rip_usrreqs
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_GRE,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = encap_init,
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.pr_usrreqs = &rip_usrreqs
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},
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# ifdef INET6
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_IPV6,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = encap_init,
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.pr_usrreqs = &rip_usrreqs
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},
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#endif
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_PIM,
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.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
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.pr_input = encap4_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs
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},
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#ifdef DEV_PFSYNC
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_PFSYNC,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = pfsync_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs
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},
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#endif /* DEV_PFSYNC */
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#ifdef DEV_CARP
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_protocol = IPPROTO_CARP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = carp_input,
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.pr_output = (pr_output_t*)rip_output,
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.pr_ctloutput = rip_ctloutput,
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.pr_usrreqs = &rip_usrreqs
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},
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#endif /* DEV_CARP */
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/* Spacer n-times for loadable protocols. */
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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IPPROTOSPACER,
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/* raw wildcard */
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &inetdomain,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_input = rip_input,
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.pr_ctloutput = rip_ctloutput,
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.pr_init = rip_init,
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.pr_usrreqs = &rip_usrreqs
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},
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};
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extern int in_inithead(void **, int);
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struct domain inetdomain = {
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.dom_family = AF_INET,
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.dom_name = "internet",
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.dom_protosw = inetsw,
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.dom_protoswNPROTOSW = &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
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#ifdef RADIX_MPATH
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.dom_rtattach = rn4_mpath_inithead,
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#else
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.dom_rtattach = in_inithead,
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#endif
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.dom_rtoffset = 32,
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.dom_maxrtkey = sizeof(struct sockaddr_in),
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.dom_ifattach = in_domifattach,
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.dom_ifdetach = in_domifdetach
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};
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DOMAIN_SET(inet);
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SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0,
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"Internet Family");
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SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP");
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SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP");
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SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP");
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SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP");
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#ifdef SCTP
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SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW, 0, "SCTP");
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#endif
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SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP");
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#ifdef IPSEC
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/* XXX no protocol # to use, pick something "reserved" */
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SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC");
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SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH");
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SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP");
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SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP");
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SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP");
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#endif /* IPSEC */
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SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW");
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#ifdef DEV_PFSYNC
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SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC, pfsync, CTLFLAG_RW, 0, "PFSYNC");
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#endif
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#ifdef DEV_CARP
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SYSCTL_NODE(_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW, 0, "CARP");
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#endif
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