sys/netinet/in_proto.c

   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  * $FreeBSD$
  31  */
  32
  33 #include "opt_ipx.h"
  34 #include "opt_mrouting.h"
  35 #include "opt_ipsec.h"
  36 #include "opt_inet6.h"
  37 #include "opt_pf.h"
  38 #include "opt_carp.h"
  39 #include "opt_sctp.h"
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/kernel.h>
  44 #include <sys/socket.h>
  45 #include <sys/domain.h>
  46 #include <sys/protosw.h>
  47 #include <sys/queue.h>
  48 #include <sys/sysctl.h>
  49
  50 #include <net/if.h>
  51 #include <net/route.h>
  52
  53 #include <netinet/in.h>
  54 #include <netinet/in_systm.h>
  55 #include <netinet/ip.h>
  56 #include <netinet/ip_var.h>
  57 #include <netinet/ip_icmp.h>
  58 #include <netinet/igmp_var.h>
  59 #include <netinet/tcp.h>
  60 #include <netinet/tcp_timer.h>
  61 #include <netinet/tcp_var.h>
  62 #include <netinet/udp.h>
  63 #include <netinet/udp_var.h>
  64 #include <netinet/ip_encap.h>
  65
  66 /*
  67  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  68  */
  69
  70 static struct pr_usrreqs nousrreqs;
  71
  72 #ifdef IPSEC
  73 #include <netipsec/ipsec.h>
  74 #endif /* IPSEC */
  75
  76 #ifdef SCTP
  77 #include <netinet/in_pcb.h>
  78 #include <netinet/sctp_pcb.h>
  79 #include <netinet/sctp.h>
  80 #include <netinet/sctp_var.h>
  81 #endif /* SCTP */
  82
  83 #ifdef DEV_PFSYNC
  84 #include <net/pfvar.h>
  85 #include <net/if_pfsync.h>
  86 #endif
  87
  88 #ifdef DEV_CARP
  89 #include <netinet/ip_carp.h>
  90 #endif
  91
  92 extern  struct domain inetdomain;
  93
  94 /* Spacer for loadable protocols. */
  95 #define IPPROTOSPACER                           \
  96 {                                               \
  97         .pr_domain =            &inetdomain,    \
  98         .pr_protocol =          PROTO_SPACER,   \
  99         .pr_usrreqs =           &nousrreqs      \
 100 }
 101
 102 struct protosw inetsw[] = {
 103 {
 104         .pr_type =              0,
 105         .pr_domain =            &inetdomain,
 106         .pr_protocol =          IPPROTO_IP,
 107         .pr_init =              ip_init,
 108         .pr_slowtimo =          ip_slowtimo,
 109         .pr_drain =             ip_drain,
 110         .pr_usrreqs =           &nousrreqs
 111 },
 112 {
 113         .pr_type =              SOCK_DGRAM,
 114         .pr_domain =            &inetdomain,
 115         .pr_protocol =          IPPROTO_UDP,
 116         .pr_flags =             PR_ATOMIC|PR_ADDR,
 117         .pr_input =             udp_input,
 118         .pr_ctlinput =          udp_ctlinput,
 119         .pr_ctloutput =         ip_ctloutput,
 120         .pr_init =              udp_init,
 121         .pr_usrreqs =           &udp_usrreqs
 122 },
 123 {
 124         .pr_type =              SOCK_STREAM,
 125         .pr_domain =            &inetdomain,
 126         .pr_protocol =          IPPROTO_TCP,
 127         .pr_flags =             PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 128         .pr_input =             tcp_input,
 129         .pr_ctlinput =          tcp_ctlinput,
 130         .pr_ctloutput =         tcp_ctloutput,
 131         .pr_init =              tcp_init,
 132         .pr_slowtimo =          tcp_slowtimo,
 133         .pr_drain =             tcp_drain,
 134         .pr_usrreqs =           &tcp_usrreqs
 135 },
 136 #ifdef SCTP
 137 {
 138         .pr_type =      SOCK_DGRAM,
 139         .pr_domain =    &inetdomain,
 140         .pr_protocol =  IPPROTO_SCTP,
 141         .pr_flags =     PR_WANTRCVD,
 142         .pr_input =     sctp_input,
 143         .pr_ctlinput =  sctp_ctlinput,
 144         .pr_ctloutput = sctp_ctloutput,
 145         .pr_init =      sctp_init,
 146         .pr_drain =     sctp_drain,
 147         .pr_usrreqs =   &sctp_usrreqs
 148 },
 149 {
 150         .pr_type =      SOCK_SEQPACKET,
 151         .pr_domain =    &inetdomain,
 152         .pr_protocol =  IPPROTO_SCTP,
 153         .pr_flags =     PR_WANTRCVD,
 154         .pr_input =     sctp_input,
 155         .pr_ctlinput =  sctp_ctlinput,
 156         .pr_ctloutput = sctp_ctloutput,
 157         .pr_drain =     sctp_drain,
 158         .pr_usrreqs =   &sctp_usrreqs
 159 },
 160
 161 {
 162         .pr_type =      SOCK_STREAM,
 163         .pr_domain =    &inetdomain,
 164         .pr_protocol =  IPPROTO_SCTP,
 165         .pr_flags =     PR_WANTRCVD,
 166         .pr_input =     sctp_input,
 167         .pr_ctlinput =  sctp_ctlinput,
 168         .pr_ctloutput = sctp_ctloutput,
 169         .pr_drain =     sctp_drain,
 170         .pr_usrreqs =   &sctp_usrreqs
 171 },
 172 #endif /* SCTP */
 173 {
 174         .pr_type =              SOCK_RAW,
 175         .pr_domain =            &inetdomain,
 176         .pr_protocol =          IPPROTO_RAW,
 177         .pr_flags =             PR_ATOMIC|PR_ADDR,
 178         .pr_input =             rip_input,
 179         .pr_ctlinput =          rip_ctlinput,
 180         .pr_ctloutput =         rip_ctloutput,
 181         .pr_usrreqs =           &rip_usrreqs
 182 },
 183 {
 184         .pr_type =              SOCK_RAW,
 185         .pr_domain =            &inetdomain,
 186         .pr_protocol =          IPPROTO_ICMP,
 187         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 188         .pr_input =             icmp_input,
 189         .pr_ctloutput =         rip_ctloutput,
 190         .pr_usrreqs =           &rip_usrreqs
 191 },
 192 {
 193         .pr_type =              SOCK_RAW,
 194         .pr_domain =            &inetdomain,
 195         .pr_protocol =          IPPROTO_IGMP,
 196         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 197         .pr_input =             igmp_input,
 198         .pr_ctloutput =         rip_ctloutput,
 199         .pr_init =              igmp_init,
 200         .pr_fasttimo =          igmp_fasttimo,
 201         .pr_slowtimo =          igmp_slowtimo,
 202         .pr_usrreqs =           &rip_usrreqs
 203 },
 204 {
 205         .pr_type =              SOCK_RAW,
 206         .pr_domain =            &inetdomain,
 207         .pr_protocol =          IPPROTO_RSVP,
 208         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 209         .pr_input =             rsvp_input,
 210         .pr_ctloutput =         rip_ctloutput,
 211         .pr_usrreqs =           &rip_usrreqs
 212 },
 213 #ifdef IPSEC
 214 {
 215         .pr_type =              SOCK_RAW,
 216         .pr_domain =            &inetdomain,
 217         .pr_protocol =          IPPROTO_AH,
 218         .pr_flags =             PR_ATOMIC|PR_ADDR,
 219         .pr_input =             ah4_input,
 220         .pr_ctlinput =          ah4_ctlinput,
 221         .pr_usrreqs =           &nousrreqs
 222 },
 223 {
 224         .pr_type =              SOCK_RAW,
 225         .pr_domain =            &inetdomain,
 226         .pr_protocol =          IPPROTO_ESP,
 227         .pr_flags =             PR_ATOMIC|PR_ADDR,
 228         .pr_input =             esp4_input,
 229         .pr_ctlinput =          esp4_ctlinput,
 230         .pr_usrreqs =           &nousrreqs
 231 },
 232 {
 233         .pr_type =              SOCK_RAW,
 234         .pr_domain =            &inetdomain,
 235         .pr_protocol =          IPPROTO_IPCOMP,
 236         .pr_flags =             PR_ATOMIC|PR_ADDR,
 237         .pr_input =             ipcomp4_input,
 238         .pr_usrreqs =           &nousrreqs
 239 },
 240 #endif /* IPSEC */
 241 {
 242         .pr_type =              SOCK_RAW,
 243         .pr_domain =            &inetdomain,
 244         .pr_protocol =          IPPROTO_IPV4,
 245         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 246         .pr_input =             encap4_input,
 247         .pr_ctloutput =         rip_ctloutput,
 248         .pr_init =              encap_init,
 249         .pr_usrreqs =           &rip_usrreqs
 250 },
 251 {
 252         .pr_type =              SOCK_RAW,
 253         .pr_domain =            &inetdomain,
 254         .pr_protocol =          IPPROTO_MOBILE,
 255         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 256         .pr_input =             encap4_input,
 257         .pr_ctloutput =         rip_ctloutput,
 258         .pr_init =              encap_init,
 259         .pr_usrreqs =           &rip_usrreqs
 260 },
 261 {
 262         .pr_type =              SOCK_RAW,
 263         .pr_domain =            &inetdomain,
 264         .pr_protocol =          IPPROTO_ETHERIP,
 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_GRE,
 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 # ifdef INET6
 282 {
 283         .pr_type =              SOCK_RAW,
 284         .pr_domain =            &inetdomain,
 285         .pr_protocol =          IPPROTO_IPV6,
 286         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 287         .pr_input =             encap4_input,
 288         .pr_ctloutput =         rip_ctloutput,
 289         .pr_init =              encap_init,
 290         .pr_usrreqs =           &rip_usrreqs
 291 },
 292 #endif
 293 {
 294         .pr_type =              SOCK_RAW,
 295         .pr_domain =            &inetdomain,
 296         .pr_protocol =          IPPROTO_PIM,
 297         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 298         .pr_input =             encap4_input,
 299         .pr_ctloutput =         rip_ctloutput,
 300         .pr_usrreqs =           &rip_usrreqs
 301 },
 302 #ifdef DEV_PFSYNC
 303 {
 304         .pr_type =              SOCK_RAW,
 305         .pr_domain =            &inetdomain,
 306         .pr_protocol =          IPPROTO_PFSYNC,
 307         .pr_flags =             PR_ATOMIC|PR_ADDR,
 308         .pr_input =             pfsync_input,
 309         .pr_ctloutput =         rip_ctloutput,
 310         .pr_usrreqs =           &rip_usrreqs
 311 },
 312 #endif  /* DEV_PFSYNC */
 313 #ifdef DEV_CARP
 314 {
 315         .pr_type =              SOCK_RAW,
 316         .pr_domain =            &inetdomain,
 317         .pr_protocol =          IPPROTO_CARP,
 318         .pr_flags =             PR_ATOMIC|PR_ADDR,
 319         .pr_input =             carp_input,
 320         .pr_output =            (pr_output_t*)rip_output,
 321         .pr_ctloutput =         rip_ctloutput,
 322         .pr_usrreqs =           &rip_usrreqs
 323 },
 324 #endif /* DEV_CARP */
 325 /* Spacer n-times for loadable protocols. */
 326 IPPROTOSPACER,
 327 IPPROTOSPACER,
 328 IPPROTOSPACER,
 329 IPPROTOSPACER,
 330 IPPROTOSPACER,
 331 IPPROTOSPACER,
 332 IPPROTOSPACER,
 333 IPPROTOSPACER,
 334 /* raw wildcard */
 335 {
 336         .pr_type =              SOCK_RAW,
 337         .pr_domain =            &inetdomain,
 338         .pr_flags =             PR_ATOMIC|PR_ADDR,
 339         .pr_input =             rip_input,
 340         .pr_ctloutput =         rip_ctloutput,
 341         .pr_init =              rip_init,
 342         .pr_usrreqs =           &rip_usrreqs
 343 },
 344 };
 345
 346 extern int in_inithead(void **, int);
 347
 348 struct domain inetdomain = {
 349         .dom_family =           AF_INET,
 350         .dom_name =             "internet",
 351         .dom_protosw =          inetsw,
 352         .dom_protoswNPROTOSW =  &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 353         .dom_rtattach =         in_inithead,
 354         .dom_rtoffset =         32,
 355         .dom_maxrtkey =         sizeof(struct sockaddr_in)
 356 };
 357
 358 DOMAIN_SET(inet);
 359
 360 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 361         "Internet Family");
 362
 363 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 364 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 365 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 366 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 367 #ifdef SCTP
 368 SYSCTL_NODE(_net_inet, IPPROTO_SCTP,    sctp,   CTLFLAG_RW, 0,  "SCTP");
 369 #endif
 370 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 371 #ifdef IPSEC
 372 /* XXX no protocol # to use, pick something "reserved" */
 373 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 374 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 375 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 376 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 377 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 378 #endif /* IPSEC */
 379 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 380 #ifdef DEV_PFSYNC
 381 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC,  pfsync, CTLFLAG_RW, 0,  "PFSYNC");
 382 #endif
 383 #ifdef DEV_CARP
 384 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,   CTLFLAG_RW, 0,  "CARP");
 385 #endif