in_proto.c

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    1 /*-
    2  * Copyright (c) 1982, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: releng/8.1/sys/netinet/in_proto.c 207695 2010-05-06 06:44:19Z bz $");
   34 
   35 #include "opt_ipx.h"
   36 #include "opt_mrouting.h"
   37 #include "opt_ipsec.h"
   38 #include "opt_inet6.h"
   39 #include "opt_pf.h"
   40 #include "opt_carp.h"
   41 #include "opt_sctp.h"
   42 #include "opt_mpath.h"
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/kernel.h>
   47 #include <sys/socket.h>
   48 #include <sys/domain.h>
   49 #include <sys/proc.h>
   50 #include <sys/protosw.h>
   51 #include <sys/queue.h>
   52 #include <sys/sysctl.h>
   53 
   54 #include <net/if.h>
   55 #include <net/route.h>
   56 #ifdef RADIX_MPATH
   57 #include <net/radix_mpath.h>
   58 #endif
   59 #include <net/vnet.h>
   60 
   61 #include <netinet/in.h>
   62 #include <netinet/in_systm.h>
   63 #include <netinet/in_var.h>
   64 #include <netinet/ip.h>
   65 #include <netinet/ip_var.h>
   66 #include <netinet/ip_icmp.h>
   67 #include <netinet/igmp_var.h>
   68 #include <netinet/tcp.h>
   69 #include <netinet/tcp_timer.h>
   70 #include <netinet/tcp_var.h>
   71 #include <netinet/udp.h>
   72 #include <netinet/udp_var.h>
   73 #include <netinet/ip_encap.h>
   74 
   75 /*
   76  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
   77  */
   78 
   79 static struct pr_usrreqs nousrreqs;
   80 
   81 #ifdef IPSEC
   82 #include <netipsec/ipsec.h>
   83 #endif /* IPSEC */
   84 
   85 #ifdef SCTP
   86 #include <netinet/in_pcb.h>
   87 #include <netinet/sctp_pcb.h>
   88 #include <netinet/sctp.h>
   89 #include <netinet/sctp_var.h>
   90 #endif /* SCTP */
   91 
   92 #ifdef DEV_PFSYNC
   93 #include <net/pfvar.h>
   94 #include <net/if_pfsync.h>
   95 #endif
   96 
   97 #ifdef DEV_CARP
   98 #include <netinet/ip_carp.h>
   99 #endif
  100 
  101 extern  struct domain inetdomain;
  102 
  103 /* Spacer for loadable protocols. */
  104 #define IPPROTOSPACER                           \
  105 {                                               \
  106         .pr_domain =            &inetdomain,    \
  107         .pr_protocol =          PROTO_SPACER,   \
  108         .pr_usrreqs =           &nousrreqs      \
  109 }
  110 
  111 struct protosw inetsw[] = {
  112 {
  113         .pr_type =              0,
  114         .pr_domain =            &inetdomain,
  115         .pr_protocol =          IPPROTO_IP,
  116         .pr_init =              ip_init,
  117 #ifdef VIMAGE
  118         .pr_destroy =           ip_destroy,
  119 #endif
  120         .pr_slowtimo =          ip_slowtimo,
  121         .pr_drain =             ip_drain,
  122         .pr_usrreqs =           &nousrreqs
  123 },
  124 {
  125         .pr_type =              SOCK_DGRAM,
  126         .pr_domain =            &inetdomain,
  127         .pr_protocol =          IPPROTO_UDP,
  128         .pr_flags =             PR_ATOMIC|PR_ADDR,
  129         .pr_input =             udp_input,
  130         .pr_ctlinput =          udp_ctlinput,
  131         .pr_ctloutput =         udp_ctloutput,
  132         .pr_init =              udp_init,
  133 #ifdef VIMAGE
  134         .pr_destroy =           udp_destroy,
  135 #endif
  136         .pr_usrreqs =           &udp_usrreqs
  137 },
  138 {
  139         .pr_type =              SOCK_STREAM,
  140         .pr_domain =            &inetdomain,
  141         .pr_protocol =          IPPROTO_TCP,
  142         .pr_flags =             PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
  143         .pr_input =             tcp_input,
  144         .pr_ctlinput =          tcp_ctlinput,
  145         .pr_ctloutput =         tcp_ctloutput,
  146         .pr_init =              tcp_init,
  147 #ifdef VIMAGE
  148         .pr_destroy =           tcp_destroy,
  149 #endif
  150         .pr_slowtimo =          tcp_slowtimo,
  151         .pr_drain =             tcp_drain,
  152         .pr_usrreqs =           &tcp_usrreqs
  153 },
  154 #ifdef SCTP
  155 { 
  156         .pr_type =              SOCK_DGRAM,
  157         .pr_domain =            &inetdomain,
  158         .pr_protocol =          IPPROTO_SCTP,
  159         .pr_flags =             PR_WANTRCVD,
  160         .pr_input =             sctp_input,
  161         .pr_ctlinput =          sctp_ctlinput,
  162         .pr_ctloutput =         sctp_ctloutput,
  163         .pr_init =              sctp_init,
  164 #ifdef VIMAGE
  165         .pr_destroy =           sctp_finish,
  166 #endif
  167         .pr_drain =             sctp_drain,
  168         .pr_usrreqs =           &sctp_usrreqs
  169 },
  170 {
  171         .pr_type =              SOCK_SEQPACKET,
  172         .pr_domain =            &inetdomain,
  173         .pr_protocol =          IPPROTO_SCTP,
  174         .pr_flags =             PR_WANTRCVD,
  175         .pr_input =             sctp_input,
  176         .pr_ctlinput =          sctp_ctlinput,
  177         .pr_ctloutput =         sctp_ctloutput,
  178         .pr_drain =             sctp_drain,
  179         .pr_usrreqs =           &sctp_usrreqs
  180 },
  181 
  182 { 
  183         .pr_type =              SOCK_STREAM,
  184         .pr_domain =            &inetdomain,
  185         .pr_protocol =          IPPROTO_SCTP,
  186         .pr_flags =             PR_WANTRCVD,
  187         .pr_input =             sctp_input,
  188         .pr_ctlinput =          sctp_ctlinput,
  189         .pr_ctloutput =         sctp_ctloutput,
  190         .pr_drain =             sctp_drain,
  191         .pr_usrreqs =           &sctp_usrreqs
  192 },
  193 #endif /* SCTP */
  194 {
  195         .pr_type =              SOCK_RAW,
  196         .pr_domain =            &inetdomain,
  197         .pr_protocol =          IPPROTO_RAW,
  198         .pr_flags =             PR_ATOMIC|PR_ADDR,
  199         .pr_input =             rip_input,
  200         .pr_ctlinput =          rip_ctlinput,
  201         .pr_ctloutput =         rip_ctloutput,
  202         .pr_usrreqs =           &rip_usrreqs
  203 },
  204 {
  205         .pr_type =              SOCK_RAW,
  206         .pr_domain =            &inetdomain,
  207         .pr_protocol =          IPPROTO_ICMP,
  208         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  209         .pr_input =             icmp_input,
  210         .pr_ctloutput =         rip_ctloutput,
  211         .pr_usrreqs =           &rip_usrreqs
  212 },
  213 {
  214         .pr_type =              SOCK_RAW,
  215         .pr_domain =            &inetdomain,
  216         .pr_protocol =          IPPROTO_IGMP,
  217         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  218         .pr_input =             igmp_input,
  219         .pr_ctloutput =         rip_ctloutput,
  220         .pr_fasttimo =          igmp_fasttimo,
  221         .pr_slowtimo =          igmp_slowtimo,
  222         .pr_usrreqs =           &rip_usrreqs
  223 },
  224 {
  225         .pr_type =              SOCK_RAW,
  226         .pr_domain =            &inetdomain,
  227         .pr_protocol =          IPPROTO_RSVP,
  228         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  229         .pr_input =             rsvp_input,
  230         .pr_ctloutput =         rip_ctloutput,
  231         .pr_usrreqs =           &rip_usrreqs
  232 },
  233 #ifdef IPSEC
  234 {
  235         .pr_type =              SOCK_RAW,
  236         .pr_domain =            &inetdomain,
  237         .pr_protocol =          IPPROTO_AH,
  238         .pr_flags =             PR_ATOMIC|PR_ADDR,
  239         .pr_input =             ah4_input,
  240         .pr_ctlinput =          ah4_ctlinput,
  241         .pr_usrreqs =           &nousrreqs
  242 },
  243 {
  244         .pr_type =              SOCK_RAW,
  245         .pr_domain =            &inetdomain,
  246         .pr_protocol =          IPPROTO_ESP,
  247         .pr_flags =             PR_ATOMIC|PR_ADDR,
  248         .pr_input =             esp4_input,
  249         .pr_ctlinput =          esp4_ctlinput,
  250         .pr_usrreqs =           &nousrreqs
  251 },
  252 {
  253         .pr_type =              SOCK_RAW,
  254         .pr_domain =            &inetdomain,
  255         .pr_protocol =          IPPROTO_IPCOMP,
  256         .pr_flags =             PR_ATOMIC|PR_ADDR,
  257         .pr_input =             ipcomp4_input,
  258         .pr_usrreqs =           &nousrreqs
  259 },
  260 #endif /* IPSEC */
  261 {
  262         .pr_type =              SOCK_RAW,
  263         .pr_domain =            &inetdomain,
  264         .pr_protocol =          IPPROTO_IPV4,
  265         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  266         .pr_input =             encap4_input,
  267         .pr_ctloutput =         rip_ctloutput,
  268         .pr_init =              encap_init,
  269         .pr_usrreqs =           &rip_usrreqs
  270 },
  271 {
  272         .pr_type =              SOCK_RAW,
  273         .pr_domain =            &inetdomain,
  274         .pr_protocol =          IPPROTO_MOBILE,
  275         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  276         .pr_input =             encap4_input,
  277         .pr_ctloutput =         rip_ctloutput,
  278         .pr_init =              encap_init,
  279         .pr_usrreqs =           &rip_usrreqs
  280 },
  281 {
  282         .pr_type =              SOCK_RAW,
  283         .pr_domain =            &inetdomain,
  284         .pr_protocol =          IPPROTO_ETHERIP,
  285         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  286         .pr_input =             encap4_input,
  287         .pr_ctloutput =         rip_ctloutput,
  288         .pr_init =              encap_init,
  289         .pr_usrreqs =           &rip_usrreqs
  290 },
  291 {
  292         .pr_type =              SOCK_RAW,
  293         .pr_domain =            &inetdomain,
  294         .pr_protocol =          IPPROTO_GRE,
  295         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  296         .pr_input =             encap4_input,
  297         .pr_ctloutput =         rip_ctloutput,
  298         .pr_init =              encap_init,
  299         .pr_usrreqs =           &rip_usrreqs
  300 },
  301 # ifdef INET6
  302 {
  303         .pr_type =              SOCK_RAW,
  304         .pr_domain =            &inetdomain,
  305         .pr_protocol =          IPPROTO_IPV6,
  306         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  307         .pr_input =             encap4_input,
  308         .pr_ctloutput =         rip_ctloutput,
  309         .pr_init =              encap_init,
  310         .pr_usrreqs =           &rip_usrreqs
  311 },
  312 #endif
  313 {
  314         .pr_type =              SOCK_RAW,
  315         .pr_domain =            &inetdomain,
  316         .pr_protocol =          IPPROTO_PIM,
  317         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  318         .pr_input =             encap4_input,
  319         .pr_ctloutput =         rip_ctloutput,
  320         .pr_usrreqs =           &rip_usrreqs
  321 },
  322 #ifdef DEV_PFSYNC
  323 {
  324         .pr_type =              SOCK_RAW,
  325         .pr_domain =            &inetdomain,
  326         .pr_protocol =          IPPROTO_PFSYNC,
  327         .pr_flags =             PR_ATOMIC|PR_ADDR,
  328         .pr_input =             pfsync_input,
  329         .pr_ctloutput =         rip_ctloutput,
  330         .pr_usrreqs =           &rip_usrreqs
  331 },
  332 #endif  /* DEV_PFSYNC */
  333 #ifdef DEV_CARP
  334 {
  335         .pr_type =              SOCK_RAW,
  336         .pr_domain =            &inetdomain,
  337         .pr_protocol =          IPPROTO_CARP,
  338         .pr_flags =             PR_ATOMIC|PR_ADDR,
  339         .pr_input =             carp_input,
  340         .pr_output =            (pr_output_t*)rip_output,
  341         .pr_ctloutput =         rip_ctloutput,
  342         .pr_usrreqs =           &rip_usrreqs
  343 },
  344 #endif /* DEV_CARP */
  345 /* Spacer n-times for loadable protocols. */
  346 IPPROTOSPACER,
  347 IPPROTOSPACER,
  348 IPPROTOSPACER,
  349 IPPROTOSPACER,
  350 IPPROTOSPACER,
  351 IPPROTOSPACER,
  352 IPPROTOSPACER,
  353 IPPROTOSPACER,
  354 /* raw wildcard */
  355 {
  356         .pr_type =              SOCK_RAW,
  357         .pr_domain =            &inetdomain,
  358         .pr_flags =             PR_ATOMIC|PR_ADDR,
  359         .pr_input =             rip_input,
  360         .pr_ctloutput =         rip_ctloutput,
  361         .pr_init =              rip_init,
  362 #ifdef VIMAGE
  363         .pr_destroy =           rip_destroy,
  364 #endif
  365         .pr_usrreqs =           &rip_usrreqs
  366 },
  367 };
  368 
  369 extern int in_inithead(void **, int);
  370 extern int in_detachhead(void **, int);
  371 
  372 struct domain inetdomain = {
  373         .dom_family =           AF_INET,
  374         .dom_name =             "internet",
  375         .dom_protosw =          inetsw,
  376         .dom_protoswNPROTOSW =  &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
  377 #ifdef RADIX_MPATH
  378         .dom_rtattach =         rn4_mpath_inithead,
  379 #else
  380         .dom_rtattach =         in_inithead,
  381 #endif
  382 #ifdef VIMAGE
  383         .dom_rtdetach =         in_detachhead,
  384 #endif
  385         .dom_rtoffset =         32,
  386         .dom_maxrtkey =         sizeof(struct sockaddr_in),
  387         .dom_ifattach =         in_domifattach,
  388         .dom_ifdetach =         in_domifdetach
  389 };
  390 
  391 VNET_DOMAIN_SET(inet);
  392 
  393 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
  394         "Internet Family");
  395 
  396 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
  397 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
  398 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
  399 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
  400 #ifdef SCTP
  401 SYSCTL_NODE(_net_inet, IPPROTO_SCTP,    sctp,   CTLFLAG_RW, 0,  "SCTP");
  402 #endif
  403 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
  404 #ifdef IPSEC
  405 /* XXX no protocol # to use, pick something "reserved" */
  406 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
  407 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
  408 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
  409 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
  410 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
  411 #endif /* IPSEC */
  412 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
  413 #ifdef DEV_PFSYNC
  414 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC,  pfsync, CTLFLAG_RW, 0,  "PFSYNC");
  415 #endif
  416 #ifdef DEV_CARP
  417 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,   CTLFLAG_RW, 0,  "CARP");
  418 #endif
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FreeBSD/Linux Kernel Cross Reference sys/netinet/in_proto.c

FreeBSD/Linux Kernel Cross Reference
sys/netinet/in_proto.c
