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 #ifdef PIM
  60 #include <netinet/pim_var.h>
  61 #endif
  62 #include <netinet/tcp.h>
  63 #include <netinet/tcp_timer.h>
  64 #include <netinet/tcp_var.h>
  65 #include <netinet/udp.h>
  66 #include <netinet/udp_var.h>
  67 #include <netinet/ip_encap.h>
  68
  69 /*
  70  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  71  */
  72
  73 static struct pr_usrreqs nousrreqs;
  74
  75 #ifdef IPSEC
  76 #include <netinet6/ipsec.h>
  77 #include <netinet6/ah.h>
  78 #ifdef IPSEC_ESP
  79 #include <netinet6/esp.h>
  80 #endif
  81 #include <netinet6/ipcomp.h>
  82 #endif /* IPSEC */
  83
  84 #ifdef FAST_IPSEC
  85 #include <netipsec/ipsec.h>
  86 #endif /* FAST_IPSEC */
  87
  88 #ifdef IPXIP
  89 #include <netipx/ipx_ip.h>
  90 #endif
  91
  92 #ifdef SCTP
  93 #include <netinet/in_pcb.h>
  94 #include <netinet/sctp_pcb.h>
  95 #include <netinet/sctp.h>
  96 #include <netinet/sctp_var.h>
  97 #endif /* SCTP */
  98
  99 #ifdef DEV_PFSYNC
 100 #include <net/pfvar.h>
 101 #include <net/if_pfsync.h>
 102 #endif
 103
 104 #ifdef DEV_CARP
 105 #include <netinet/ip_carp.h>
 106 #endif
 107
 108 extern  struct domain inetdomain;
 109
 110 /* Spacer for loadable protocols. */
 111 #define IPPROTOSPACER                           \
 112 {                                               \
 113         .pr_domain =            &inetdomain,    \
 114         .pr_protocol =          PROTO_SPACER,   \
 115         .pr_usrreqs =           &nousrreqs      \
 116 }
 117
 118 struct protosw inetsw[] = {
 119 {
 120         .pr_type =              0,
 121         .pr_domain =            &inetdomain,
 122         .pr_protocol =          IPPROTO_IP,
 123         .pr_init =              ip_init,
 124         .pr_slowtimo =          ip_slowtimo,
 125         .pr_drain =             ip_drain,
 126         .pr_usrreqs =           &nousrreqs
 127 },
 128 {
 129         .pr_type =              SOCK_DGRAM,
 130         .pr_domain =            &inetdomain,
 131         .pr_protocol =          IPPROTO_UDP,
 132         .pr_flags =             PR_ATOMIC|PR_ADDR,
 133         .pr_input =             udp_input,
 134         .pr_ctlinput =          udp_ctlinput,
 135         .pr_ctloutput =         ip_ctloutput,
 136         .pr_init =              udp_init,
 137         .pr_usrreqs =           &udp_usrreqs
 138 },
 139 {
 140         .pr_type =              SOCK_STREAM,
 141         .pr_domain =            &inetdomain,
 142         .pr_protocol =          IPPROTO_TCP,
 143         .pr_flags =             PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 144         .pr_input =             tcp_input,
 145         .pr_ctlinput =          tcp_ctlinput,
 146         .pr_ctloutput =         tcp_ctloutput,
 147         .pr_init =              tcp_init,
 148         .pr_slowtimo =          tcp_slowtimo,
 149         .pr_drain =             tcp_drain,
 150         .pr_usrreqs =           &tcp_usrreqs
 151 },
 152 #ifdef SCTP
 153 {
 154         .pr_type =      SOCK_DGRAM,
 155         .pr_domain =    &inetdomain,
 156         .pr_protocol =  IPPROTO_SCTP,
 157         .pr_flags =     PR_WANTRCVD,
 158         .pr_input =     sctp_input,
 159         .pr_ctlinput =  sctp_ctlinput,
 160         .pr_ctloutput = sctp_ctloutput,
 161         .pr_init =      sctp_init,
 162         .pr_drain =     sctp_drain,
 163         .pr_usrreqs =   &sctp_usrreqs
 164 },
 165 {
 166         .pr_type =      SOCK_SEQPACKET,
 167         .pr_domain =    &inetdomain,
 168         .pr_protocol =  IPPROTO_SCTP,
 169         .pr_flags =     PR_WANTRCVD,
 170         .pr_input =     sctp_input,
 171         .pr_ctlinput =  sctp_ctlinput,
 172         .pr_ctloutput = sctp_ctloutput,
 173         .pr_drain =     sctp_drain,
 174         .pr_usrreqs =   &sctp_usrreqs
 175 },
 176
 177 {
 178         .pr_type =      SOCK_STREAM,
 179         .pr_domain =    &inetdomain,
 180         .pr_protocol =  IPPROTO_SCTP,
 181         .pr_flags =     PR_WANTRCVD,
 182         .pr_input =     sctp_input,
 183         .pr_ctlinput =  sctp_ctlinput,
 184         .pr_ctloutput = sctp_ctloutput,
 185         .pr_drain =     sctp_drain,
 186         .pr_usrreqs =   &sctp_usrreqs
 187 },
 188 #endif /* SCTP */
 189 {
 190         .pr_type =              SOCK_RAW,
 191         .pr_domain =            &inetdomain,
 192         .pr_protocol =          IPPROTO_RAW,
 193         .pr_flags =             PR_ATOMIC|PR_ADDR,
 194         .pr_input =             rip_input,
 195         .pr_ctlinput =          rip_ctlinput,
 196         .pr_ctloutput =         rip_ctloutput,
 197         .pr_usrreqs =           &rip_usrreqs
 198 },
 199 {
 200         .pr_type =              SOCK_RAW,
 201         .pr_domain =            &inetdomain,
 202         .pr_protocol =          IPPROTO_ICMP,
 203         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 204         .pr_input =             icmp_input,
 205         .pr_ctloutput =         rip_ctloutput,
 206         .pr_usrreqs =           &rip_usrreqs
 207 },
 208 {
 209         .pr_type =              SOCK_RAW,
 210         .pr_domain =            &inetdomain,
 211         .pr_protocol =          IPPROTO_IGMP,
 212         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 213         .pr_input =             igmp_input,
 214         .pr_ctloutput =         rip_ctloutput,
 215         .pr_init =              igmp_init,
 216         .pr_fasttimo =          igmp_fasttimo,
 217         .pr_slowtimo =          igmp_slowtimo,
 218         .pr_usrreqs =           &rip_usrreqs
 219 },
 220 {
 221         .pr_type =              SOCK_RAW,
 222         .pr_domain =            &inetdomain,
 223         .pr_protocol =          IPPROTO_RSVP,
 224         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 225         .pr_input =             rsvp_input,
 226         .pr_ctloutput =         rip_ctloutput,
 227         .pr_usrreqs =           &rip_usrreqs
 228 },
 229 #ifdef IPSEC
 230 {
 231         .pr_type =              SOCK_RAW,
 232         .pr_domain =            &inetdomain,
 233         .pr_protocol =          IPPROTO_AH,
 234         .pr_flags =             PR_ATOMIC|PR_ADDR,
 235         .pr_input =             ah4_input,
 236         .pr_usrreqs =           &nousrreqs
 237 },
 238 #ifdef IPSEC_ESP
 239 {
 240         .pr_type =              SOCK_RAW,
 241         .pr_domain =            &inetdomain,
 242         .pr_protocol =          IPPROTO_ESP,
 243         .pr_flags =             PR_ATOMIC|PR_ADDR,
 244         .pr_input =             esp4_input,
 245         .pr_usrreqs =           &nousrreqs
 246 },
 247 #endif
 248 {
 249         .pr_type =              SOCK_RAW,
 250         .pr_domain =            &inetdomain,
 251         .pr_protocol =          IPPROTO_IPCOMP,
 252         .pr_flags =             PR_ATOMIC|PR_ADDR,
 253         .pr_input =             ipcomp4_input,
 254         .pr_usrreqs =           &nousrreqs
 255 },
 256 #endif /* IPSEC */
 257 #ifdef FAST_IPSEC
 258 {
 259         .pr_type =              SOCK_RAW,
 260         .pr_domain =            &inetdomain,
 261         .pr_protocol =          IPPROTO_AH,
 262         .pr_flags =             PR_ATOMIC|PR_ADDR,
 263         .pr_input =             ah4_input,
 264         .pr_ctlinput =          ah4_ctlinput,
 265         .pr_usrreqs =           &nousrreqs
 266 },
 267 {
 268         .pr_type =              SOCK_RAW,
 269         .pr_domain =            &inetdomain,
 270         .pr_protocol =          IPPROTO_ESP,
 271         .pr_flags =             PR_ATOMIC|PR_ADDR,
 272         .pr_input =             esp4_input,
 273         .pr_ctlinput =          esp4_ctlinput,
 274         .pr_usrreqs =           &nousrreqs
 275 },
 276 {
 277         .pr_type =              SOCK_RAW,
 278         .pr_domain =            &inetdomain,
 279         .pr_protocol =          IPPROTO_IPCOMP,
 280         .pr_flags =             PR_ATOMIC|PR_ADDR,
 281         .pr_input =             ipcomp4_input,
 282         .pr_usrreqs =           &nousrreqs
 283 },
 284 #endif /* FAST_IPSEC */
 285 {
 286         .pr_type =              SOCK_RAW,
 287         .pr_domain =            &inetdomain,
 288         .pr_protocol =          IPPROTO_IPV4,
 289         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 290         .pr_input =             encap4_input,
 291         .pr_ctloutput =         rip_ctloutput,
 292         .pr_init =              encap_init,
 293         .pr_usrreqs =           &rip_usrreqs
 294 },
 295 {
 296         .pr_type =              SOCK_RAW,
 297         .pr_domain =            &inetdomain,
 298         .pr_protocol =          IPPROTO_MOBILE,
 299         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 300         .pr_input =             encap4_input,
 301         .pr_ctloutput =         rip_ctloutput,
 302         .pr_init =              encap_init,
 303         .pr_usrreqs =           &rip_usrreqs
 304 },
 305 {
 306         .pr_type =              SOCK_RAW,
 307         .pr_domain =            &inetdomain,
 308         .pr_protocol =          IPPROTO_ETHERIP,
 309         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 310         .pr_input =             encap4_input,
 311         .pr_ctloutput =         rip_ctloutput,
 312         .pr_init =              encap_init,
 313         .pr_usrreqs =           &rip_usrreqs
 314 },
 315 {
 316         .pr_type =              SOCK_RAW,
 317         .pr_domain =            &inetdomain,
 318         .pr_protocol =          IPPROTO_GRE,
 319         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 320         .pr_input =             encap4_input,
 321         .pr_ctloutput =         rip_ctloutput,
 322         .pr_init =              encap_init,
 323         .pr_usrreqs =           &rip_usrreqs
 324 },
 325 # ifdef INET6
 326 {
 327         .pr_type =              SOCK_RAW,
 328         .pr_domain =            &inetdomain,
 329         .pr_protocol =          IPPROTO_IPV6,
 330         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 331         .pr_input =             encap4_input,
 332         .pr_ctloutput =         rip_ctloutput,
 333         .pr_init =              encap_init,
 334         .pr_usrreqs =           &rip_usrreqs
 335 },
 336 #endif
 337 #ifdef IPXIP
 338 {
 339         .pr_type =              SOCK_RAW,
 340         .pr_domain =            &inetdomain,
 341         .pr_protocol =          IPPROTO_IDP,
 342         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 343         .pr_input =             ipxip_input,
 344         .pr_ctlinput =          ipxip_ctlinput,
 345         .pr_usrreqs =           &rip_usrreqs
 346 },
 347 #endif
 348 #ifdef PIM
 349 {
 350         .pr_type =              SOCK_RAW,
 351         .pr_domain =            &inetdomain,
 352         .pr_protocol =          IPPROTO_PIM,
 353         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 354         .pr_input =             pim_input,
 355         .pr_ctloutput =         rip_ctloutput,
 356         .pr_usrreqs =           &rip_usrreqs
 357 },
 358 #endif  /* PIM */
 359 #ifdef DEV_PFSYNC
 360 {
 361         .pr_type =              SOCK_RAW,
 362         .pr_domain =            &inetdomain,
 363         .pr_protocol =          IPPROTO_PFSYNC,
 364         .pr_flags =             PR_ATOMIC|PR_ADDR,
 365         .pr_input =             pfsync_input,
 366         .pr_ctloutput =         rip_ctloutput,
 367         .pr_usrreqs =           &rip_usrreqs
 368 },
 369 #endif  /* DEV_PFSYNC */
 370 #ifdef DEV_CARP
 371 {
 372         .pr_type =              SOCK_RAW,
 373         .pr_domain =            &inetdomain,
 374         .pr_protocol =          IPPROTO_CARP,
 375         .pr_flags =             PR_ATOMIC|PR_ADDR,
 376         .pr_input =             carp_input,
 377         .pr_output =            (pr_output_t*)rip_output,
 378         .pr_ctloutput =         rip_ctloutput,
 379         .pr_usrreqs =           &rip_usrreqs
 380 },
 381 #endif /* DEV_CARP */
 382 /* Spacer n-times for loadable protocols. */
 383 IPPROTOSPACER,
 384 IPPROTOSPACER,
 385 IPPROTOSPACER,
 386 IPPROTOSPACER,
 387 IPPROTOSPACER,
 388 IPPROTOSPACER,
 389 IPPROTOSPACER,
 390 IPPROTOSPACER,
 391 /* raw wildcard */
 392 {
 393         .pr_type =              SOCK_RAW,
 394         .pr_domain =            &inetdomain,
 395         .pr_flags =             PR_ATOMIC|PR_ADDR,
 396         .pr_input =             rip_input,
 397         .pr_ctloutput =         rip_ctloutput,
 398         .pr_init =              rip_init,
 399         .pr_usrreqs =           &rip_usrreqs
 400 },
 401 };
 402
 403 extern int in_inithead(void **, int);
 404
 405 struct domain inetdomain = {
 406         .dom_family =           AF_INET,
 407         .dom_name =             "internet",
 408         .dom_protosw =          inetsw,
 409         .dom_protoswNPROTOSW =  &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 410         .dom_rtattach =         in_inithead,
 411         .dom_rtoffset =         32,
 412         .dom_maxrtkey =         sizeof(struct sockaddr_in)
 413 };
 414
 415 DOMAIN_SET(inet);
 416
 417 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 418         "Internet Family");
 419
 420 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 421 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 422 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 423 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 424 #ifdef SCTP
 425 SYSCTL_NODE(_net_inet, IPPROTO_SCTP,    sctp,   CTLFLAG_RW, 0,  "SCTP");
 426 #endif
 427 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 428 #ifdef FAST_IPSEC
 429 /* XXX no protocol # to use, pick something "reserved" */
 430 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 431 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 432 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 433 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 434 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 435 #else
 436 #ifdef IPSEC
 437 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 438 #endif /* IPSEC */
 439 #endif /* !FAST_IPSEC */
 440 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 441 #ifdef PIM
 442 SYSCTL_NODE(_net_inet, IPPROTO_PIM,     pim,    CTLFLAG_RW, 0,  "PIM");
 443 #endif
 444 #ifdef DEV_PFSYNC
 445 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC,  pfsync, CTLFLAG_RW, 0,  "PFSYNC");
 446 #endif
 447 #ifdef DEV_CARP
 448 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,   CTLFLAG_RW, 0,  "CARP");
 449 #endif