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 <netinet6/ipsec.h>
  74 #include <netinet6/ah.h>
  75 #ifdef IPSEC_ESP
  76 #include <netinet6/esp.h>
  77 #endif
  78 #include <netinet6/ipcomp.h>
  79 #endif /* IPSEC */
  80
  81 #ifdef FAST_IPSEC
  82 #include <netipsec/ipsec.h>
  83 #endif /* FAST_IPSEC */
  84
  85 #ifdef IPXIP
  86 #include <netipx/ipx_ip.h>
  87 #endif
  88
  89 #ifdef SCTP
  90 #include <netinet/in_pcb.h>
  91 #include <netinet/sctp_pcb.h>
  92 #include <netinet/sctp.h>
  93 #include <netinet/sctp_var.h>
  94 #endif /* SCTP */
  95
  96 #ifdef DEV_PFSYNC
  97 #include <net/pfvar.h>
  98 #include <net/if_pfsync.h>
  99 #endif
 100
 101 #ifdef DEV_CARP
 102 #include <netinet/ip_carp.h>
 103 #endif
 104
 105 extern  struct domain inetdomain;
 106
 107 /* Spacer for loadable protocols. */
 108 #define IPPROTOSPACER                           \
 109 {                                               \
 110         .pr_domain =            &inetdomain,    \
 111         .pr_protocol =          PROTO_SPACER,   \
 112         .pr_usrreqs =           &nousrreqs      \
 113 }
 114
 115 struct protosw inetsw[] = {
 116 {
 117         .pr_type =              0,
 118         .pr_domain =            &inetdomain,
 119         .pr_protocol =          IPPROTO_IP,
 120         .pr_init =              ip_init,
 121         .pr_slowtimo =          ip_slowtimo,
 122         .pr_drain =             ip_drain,
 123         .pr_usrreqs =           &nousrreqs
 124 },
 125 {
 126         .pr_type =              SOCK_DGRAM,
 127         .pr_domain =            &inetdomain,
 128         .pr_protocol =          IPPROTO_UDP,
 129         .pr_flags =             PR_ATOMIC|PR_ADDR,
 130         .pr_input =             udp_input,
 131         .pr_ctlinput =          udp_ctlinput,
 132         .pr_ctloutput =         ip_ctloutput,
 133         .pr_init =              udp_init,
 134         .pr_usrreqs =           &udp_usrreqs
 135 },
 136 {
 137         .pr_type =              SOCK_STREAM,
 138         .pr_domain =            &inetdomain,
 139         .pr_protocol =          IPPROTO_TCP,
 140         .pr_flags =             PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 141         .pr_input =             tcp_input,
 142         .pr_ctlinput =          tcp_ctlinput,
 143         .pr_ctloutput =         tcp_ctloutput,
 144         .pr_init =              tcp_init,
 145         .pr_slowtimo =          tcp_slowtimo,
 146         .pr_drain =             tcp_drain,
 147         .pr_usrreqs =           &tcp_usrreqs
 148 },
 149 #ifdef SCTP
 150 {
 151         .pr_type =      SOCK_DGRAM,
 152         .pr_domain =    &inetdomain,
 153         .pr_protocol =  IPPROTO_SCTP,
 154         .pr_flags =     PR_WANTRCVD,
 155         .pr_input =     sctp_input,
 156         .pr_ctlinput =  sctp_ctlinput,
 157         .pr_ctloutput = sctp_ctloutput,
 158         .pr_init =      sctp_init,
 159         .pr_drain =     sctp_drain,
 160         .pr_usrreqs =   &sctp_usrreqs
 161 },
 162 {
 163         .pr_type =      SOCK_SEQPACKET,
 164         .pr_domain =    &inetdomain,
 165         .pr_protocol =  IPPROTO_SCTP,
 166         .pr_flags =     PR_WANTRCVD,
 167         .pr_input =     sctp_input,
 168         .pr_ctlinput =  sctp_ctlinput,
 169         .pr_ctloutput = sctp_ctloutput,
 170         .pr_drain =     sctp_drain,
 171         .pr_usrreqs =   &sctp_usrreqs
 172 },
 173
 174 {
 175         .pr_type =      SOCK_STREAM,
 176         .pr_domain =    &inetdomain,
 177         .pr_protocol =  IPPROTO_SCTP,
 178         .pr_flags =     PR_WANTRCVD,
 179         .pr_input =     sctp_input,
 180         .pr_ctlinput =  sctp_ctlinput,
 181         .pr_ctloutput = sctp_ctloutput,
 182         .pr_drain =     sctp_drain,
 183         .pr_usrreqs =   &sctp_usrreqs
 184 },
 185 #endif /* SCTP */
 186 {
 187         .pr_type =              SOCK_RAW,
 188         .pr_domain =            &inetdomain,
 189         .pr_protocol =          IPPROTO_RAW,
 190         .pr_flags =             PR_ATOMIC|PR_ADDR,
 191         .pr_input =             rip_input,
 192         .pr_ctlinput =          rip_ctlinput,
 193         .pr_ctloutput =         rip_ctloutput,
 194         .pr_usrreqs =           &rip_usrreqs
 195 },
 196 {
 197         .pr_type =              SOCK_RAW,
 198         .pr_domain =            &inetdomain,
 199         .pr_protocol =          IPPROTO_ICMP,
 200         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 201         .pr_input =             icmp_input,
 202         .pr_ctloutput =         rip_ctloutput,
 203         .pr_usrreqs =           &rip_usrreqs
 204 },
 205 {
 206         .pr_type =              SOCK_RAW,
 207         .pr_domain =            &inetdomain,
 208         .pr_protocol =          IPPROTO_IGMP,
 209         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 210         .pr_input =             igmp_input,
 211         .pr_ctloutput =         rip_ctloutput,
 212         .pr_init =              igmp_init,
 213         .pr_fasttimo =          igmp_fasttimo,
 214         .pr_slowtimo =          igmp_slowtimo,
 215         .pr_usrreqs =           &rip_usrreqs
 216 },
 217 {
 218         .pr_type =              SOCK_RAW,
 219         .pr_domain =            &inetdomain,
 220         .pr_protocol =          IPPROTO_RSVP,
 221         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 222         .pr_input =             rsvp_input,
 223         .pr_ctloutput =         rip_ctloutput,
 224         .pr_usrreqs =           &rip_usrreqs
 225 },
 226 #ifdef IPSEC
 227 {
 228         .pr_type =              SOCK_RAW,
 229         .pr_domain =            &inetdomain,
 230         .pr_protocol =          IPPROTO_AH,
 231         .pr_flags =             PR_ATOMIC|PR_ADDR,
 232         .pr_input =             ah4_input,
 233         .pr_usrreqs =           &nousrreqs
 234 },
 235 #ifdef IPSEC_ESP
 236 {
 237         .pr_type =              SOCK_RAW,
 238         .pr_domain =            &inetdomain,
 239         .pr_protocol =          IPPROTO_ESP,
 240         .pr_flags =             PR_ATOMIC|PR_ADDR,
 241         .pr_input =             esp4_input,
 242         .pr_usrreqs =           &nousrreqs
 243 },
 244 #endif
 245 {
 246         .pr_type =              SOCK_RAW,
 247         .pr_domain =            &inetdomain,
 248         .pr_protocol =          IPPROTO_IPCOMP,
 249         .pr_flags =             PR_ATOMIC|PR_ADDR,
 250         .pr_input =             ipcomp4_input,
 251         .pr_usrreqs =           &nousrreqs
 252 },
 253 #endif /* IPSEC */
 254 #ifdef FAST_IPSEC
 255 {
 256         .pr_type =              SOCK_RAW,
 257         .pr_domain =            &inetdomain,
 258         .pr_protocol =          IPPROTO_AH,
 259         .pr_flags =             PR_ATOMIC|PR_ADDR,
 260         .pr_input =             ah4_input,
 261         .pr_ctlinput =          ah4_ctlinput,
 262         .pr_usrreqs =           &nousrreqs
 263 },
 264 {
 265         .pr_type =              SOCK_RAW,
 266         .pr_domain =            &inetdomain,
 267         .pr_protocol =          IPPROTO_ESP,
 268         .pr_flags =             PR_ATOMIC|PR_ADDR,
 269         .pr_input =             esp4_input,
 270         .pr_ctlinput =          esp4_ctlinput,
 271         .pr_usrreqs =           &nousrreqs
 272 },
 273 {
 274         .pr_type =              SOCK_RAW,
 275         .pr_domain =            &inetdomain,
 276         .pr_protocol =          IPPROTO_IPCOMP,
 277         .pr_flags =             PR_ATOMIC|PR_ADDR,
 278         .pr_input =             ipcomp4_input,
 279         .pr_usrreqs =           &nousrreqs
 280 },
 281 #endif /* FAST_IPSEC */
 282 {
 283         .pr_type =              SOCK_RAW,
 284         .pr_domain =            &inetdomain,
 285         .pr_protocol =          IPPROTO_IPV4,
 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 {
 293         .pr_type =              SOCK_RAW,
 294         .pr_domain =            &inetdomain,
 295         .pr_protocol =          IPPROTO_MOBILE,
 296         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 297         .pr_input =             encap4_input,
 298         .pr_ctloutput =         rip_ctloutput,
 299         .pr_init =              encap_init,
 300         .pr_usrreqs =           &rip_usrreqs
 301 },
 302 {
 303         .pr_type =              SOCK_RAW,
 304         .pr_domain =            &inetdomain,
 305         .pr_protocol =          IPPROTO_ETHERIP,
 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 {
 313         .pr_type =              SOCK_RAW,
 314         .pr_domain =            &inetdomain,
 315         .pr_protocol =          IPPROTO_GRE,
 316         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 317         .pr_input =             encap4_input,
 318         .pr_ctloutput =         rip_ctloutput,
 319         .pr_init =              encap_init,
 320         .pr_usrreqs =           &rip_usrreqs
 321 },
 322 # ifdef INET6
 323 {
 324         .pr_type =              SOCK_RAW,
 325         .pr_domain =            &inetdomain,
 326         .pr_protocol =          IPPROTO_IPV6,
 327         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 328         .pr_input =             encap4_input,
 329         .pr_ctloutput =         rip_ctloutput,
 330         .pr_init =              encap_init,
 331         .pr_usrreqs =           &rip_usrreqs
 332 },
 333 #endif
 334 #ifdef IPXIP
 335 {
 336         .pr_type =              SOCK_RAW,
 337         .pr_domain =            &inetdomain,
 338         .pr_protocol =          IPPROTO_IDP,
 339         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 340         .pr_input =             ipxip_input,
 341         .pr_ctlinput =          ipxip_ctlinput,
 342         .pr_usrreqs =           &rip_usrreqs
 343 },
 344 #endif
 345 {
 346         .pr_type =              SOCK_RAW,
 347         .pr_domain =            &inetdomain,
 348         .pr_protocol =          IPPROTO_PIM,
 349         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 350         .pr_input =             encap4_input,
 351         .pr_ctloutput =         rip_ctloutput,
 352         .pr_usrreqs =           &rip_usrreqs
 353 },
 354 #ifdef DEV_PFSYNC
 355 {
 356         .pr_type =              SOCK_RAW,
 357         .pr_domain =            &inetdomain,
 358         .pr_protocol =          IPPROTO_PFSYNC,
 359         .pr_flags =             PR_ATOMIC|PR_ADDR,
 360         .pr_input =             pfsync_input,
 361         .pr_ctloutput =         rip_ctloutput,
 362         .pr_usrreqs =           &rip_usrreqs
 363 },
 364 #endif  /* DEV_PFSYNC */
 365 #ifdef DEV_CARP
 366 {
 367         .pr_type =              SOCK_RAW,
 368         .pr_domain =            &inetdomain,
 369         .pr_protocol =          IPPROTO_CARP,
 370         .pr_flags =             PR_ATOMIC|PR_ADDR,
 371         .pr_input =             carp_input,
 372         .pr_output =            (pr_output_t*)rip_output,
 373         .pr_ctloutput =         rip_ctloutput,
 374         .pr_usrreqs =           &rip_usrreqs
 375 },
 376 #endif /* DEV_CARP */
 377 /* Spacer n-times for loadable protocols. */
 378 IPPROTOSPACER,
 379 IPPROTOSPACER,
 380 IPPROTOSPACER,
 381 IPPROTOSPACER,
 382 IPPROTOSPACER,
 383 IPPROTOSPACER,
 384 IPPROTOSPACER,
 385 IPPROTOSPACER,
 386 /* raw wildcard */
 387 {
 388         .pr_type =              SOCK_RAW,
 389         .pr_domain =            &inetdomain,
 390         .pr_flags =             PR_ATOMIC|PR_ADDR,
 391         .pr_input =             rip_input,
 392         .pr_ctloutput =         rip_ctloutput,
 393         .pr_init =              rip_init,
 394         .pr_usrreqs =           &rip_usrreqs
 395 },
 396 };
 397
 398 extern int in_inithead(void **, int);
 399
 400 struct domain inetdomain = {
 401         .dom_family =           AF_INET,
 402         .dom_name =             "internet",
 403         .dom_protosw =          inetsw,
 404         .dom_protoswNPROTOSW =  &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 405         .dom_rtattach =         in_inithead,
 406         .dom_rtoffset =         32,
 407         .dom_maxrtkey =         sizeof(struct sockaddr_in)
 408 };
 409
 410 DOMAIN_SET(inet);
 411
 412 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 413         "Internet Family");
 414
 415 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 416 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 417 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 418 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 419 #ifdef SCTP
 420 SYSCTL_NODE(_net_inet, IPPROTO_SCTP,    sctp,   CTLFLAG_RW, 0,  "SCTP");
 421 #endif
 422 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 423 #ifdef FAST_IPSEC
 424 /* XXX no protocol # to use, pick something "reserved" */
 425 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 426 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 427 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 428 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 429 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 430 #else
 431 #ifdef IPSEC
 432 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 433 #endif /* IPSEC */
 434 #endif /* !FAST_IPSEC */
 435 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 436 #ifdef DEV_PFSYNC
 437 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC,  pfsync, CTLFLAG_RW, 0,  "PFSYNC");
 438 #endif
 439 #ifdef DEV_CARP
 440 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,   CTLFLAG_RW, 0,  "CARP");
 441 #endif