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  * 3. 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: src/sys/netinet/in_proto.c,v 1.53.2.7 2003/08/24 08:24:38 hsu Exp $
  31  */
  32
  33 #include "opt_ipdivert.h"
  34 #include "opt_ipx.h"
  35 #include "opt_mrouting.h"
  36 #include "opt_ipsec.h"
  37 #include "opt_inet6.h"
  38 #include "opt_sctp.h"
  39 #include "opt_carp.h"
  40
  41 #include <sys/param.h>
  42 #include <sys/kernel.h>
  43 #include <sys/socket.h>
  44 #include <sys/domain.h>
  45 #include <sys/protosw.h>
  46 #include <sys/queue.h>
  47 #include <sys/sysctl.h>
  48
  49 #include <net/if.h>
  50 #include <net/route.h>
  51
  52 #include <netinet/in.h>
  53 #include <netinet/in_systm.h>
  54 #include <netinet/ip.h>
  55 #include <netinet/ip_var.h>
  56 #include <netinet/ip_icmp.h>
  57 #include <netinet/igmp_var.h>
  58 #ifdef PIM
  59 #include <netinet/pim_var.h>
  60 #endif
  61 #include <netinet/tcp.h>
  62 #include <netinet/tcp_timer.h>
  63 #include <netinet/tcp_var.h>
  64 #include <netinet/udp.h>
  65 #include <netinet/udp_var.h>
  66 #include <netinet/ip_encap.h>
  67 #ifdef IPDIVERT
  68 #include <netinet/ip_divert.h>
  69 #endif
  70
  71 /*
  72  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  73  */
  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 <netproto/ipsec/ipsec.h>
  86 #endif /* FAST_IPSEC */
  87
  88 #ifdef IPXIP
  89 #include <netproto/ipx/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 #include <net/netisr.h>         /* for cpu0_soport */
 100
 101 #ifdef CARP
 102 #include <netinet/ip_carp.h>
 103 #endif
 104
 105 extern  struct domain inetdomain;
 106 static  struct pr_usrreqs nousrreqs;
 107
 108 struct protosw inetsw[] = {
 109     {
 110         .pr_type = 0,
 111         .pr_domain = &inetdomain,
 112         .pr_protocol = 0,
 113         .pr_flags = 0,
 114
 115         .pr_ctlport = NULL,
 116
 117         .pr_init = ip_init,
 118         .pr_fasttimo = NULL,
 119         .pr_slowtimo = ip_slowtimo,
 120         .pr_drain = ip_drain,
 121         .pr_usrreqs = &nousrreqs
 122     },
 123     {
 124         .pr_type = SOCK_DGRAM,
 125         .pr_domain = &inetdomain,
 126         .pr_protocol = IPPROTO_UDP,
 127         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE|PR_ASYNC_SEND,
 128
 129         .pr_input = udp_input,
 130         .pr_output = NULL,
 131         .pr_ctlinput = udp_ctlinput,
 132         .pr_ctloutput = ip_ctloutput,
 133
 134         .pr_ctlport = udp_ctlport,
 135         .pr_init = udp_init,
 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_WANTRCVD|
 143             PR_MPSAFE|PR_ASYNC_SEND|PR_ASYNC_RCVD,
 144
 145         .pr_input = tcp_input,
 146         .pr_output = NULL,
 147         .pr_ctlinput = tcp_ctlinput,
 148         .pr_ctloutput = tcp_ctloutput,
 149
 150         .pr_ctlport = tcp_ctlport,
 151         .pr_init = tcp_init,
 152         .pr_fasttimo = NULL,
 153         .pr_slowtimo = NULL,
 154         .pr_drain = tcp_drain,
 155         .pr_usrreqs = &tcp_usrreqs
 156     },
 157 #ifdef SCTP
 158     /*
 159      * Order is very important here, we add the good one in
 160      * in this postion so it maps to the right ip_protox[]
 161      * postion for SCTP. Don't move the one above below
 162      * this one or IPv6/4 compatability will break
 163      */
 164     {
 165         .pr_type = SOCK_DGRAM,
 166         .pr_domain = &inetdomain,
 167         .pr_protocol = IPPROTO_SCTP,
 168         .pr_flags = PR_ADDR_OPT|PR_WANTRCVD,
 169
 170         .pr_input = sctp_input,
 171         .pr_output = NULL,
 172         .pr_ctlinput = sctp_ctlinput,
 173         .pr_ctloutput = sctp_ctloutput,
 174
 175         .pr_ctlport = cpu0_ctlport,
 176         .pr_init = sctp_init,
 177         .pr_drain = sctp_drain,
 178         .pr_usrreqs = &sctp_usrreqs
 179     },
 180     {
 181         .pr_type = SOCK_SEQPACKET,
 182         .pr_domain = &inetdomain,
 183         .pr_protocol = IPPROTO_SCTP,
 184         .pr_flags = PR_ADDR_OPT|PR_WANTRCVD,
 185
 186         .pr_input = sctp_input,
 187         .pr_output = NULL,
 188         .pr_ctlinput = sctp_ctlinput,
 189         .pr_ctloutput = sctp_ctloutput,
 190
 191         .pr_ctlport = cpu0_ctlport,
 192         .pr_drain = sctp_drain,
 193         .pr_usrreqs = &sctp_usrreqs
 194     },
 195
 196     {
 197         .pr_type = SOCK_STREAM,
 198         .pr_domain = &inetdomain,
 199         .pr_protocol = IPPROTO_SCTP,
 200         .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD,
 201
 202         .pr_input = sctp_input,
 203         .pr_output = NULL,
 204         .pr_ctlinput = sctp_ctlinput,
 205         .pr_ctloutput = sctp_ctloutput,
 206
 207         .pr_ctlport = cpu0_ctlport,
 208         .pr_drain = sctp_drain,
 209         .pr_usrreqs = &sctp_usrreqs
 210     },
 211 #endif /* SCTP */
 212     {
 213         .pr_type = SOCK_RAW,
 214         .pr_domain = &inetdomain,
 215         .pr_protocol = IPPROTO_RAW,
 216         .pr_flags = PR_ATOMIC|PR_ADDR,
 217
 218         .pr_input = rip_input,
 219         .pr_output = NULL,
 220         .pr_ctlinput = rip_ctlinput,
 221         .pr_ctloutput = rip_ctloutput,
 222
 223         .pr_ctlport = cpu0_ctlport,
 224         .pr_usrreqs = &rip_usrreqs
 225     },
 226     {
 227         .pr_type = SOCK_RAW,
 228         .pr_domain = &inetdomain,
 229         .pr_protocol = IPPROTO_ICMP,
 230         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE,
 231
 232         .pr_input = icmp_input,
 233         .pr_output = NULL,
 234         .pr_ctlinput = NULL,
 235         .pr_ctloutput = rip_ctloutput,
 236
 237         .pr_usrreqs = &rip_usrreqs
 238     },
 239     {
 240         .pr_type = SOCK_RAW,
 241         .pr_domain = &inetdomain,
 242         .pr_protocol = IPPROTO_IGMP,
 243         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 244
 245         .pr_input = igmp_input,
 246         .pr_output = NULL,
 247         .pr_ctlinput = NULL,
 248         .pr_ctloutput = rip_ctloutput,
 249
 250         .pr_init = igmp_init,
 251         .pr_fasttimo = igmp_fasttimo,
 252         .pr_slowtimo = igmp_slowtimo,
 253         .pr_drain = NULL,
 254         .pr_usrreqs = &rip_usrreqs
 255     },
 256     {
 257         .pr_type = SOCK_RAW,
 258         .pr_domain = &inetdomain,
 259         .pr_protocol = IPPROTO_RSVP,
 260         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 261
 262         .pr_input = rsvp_input,
 263         .pr_output = NULL,
 264         .pr_ctlinput = NULL,
 265         .pr_ctloutput = rip_ctloutput,
 266
 267         .pr_usrreqs = &rip_usrreqs
 268     },
 269 #ifdef IPSEC
 270     {
 271         .pr_type = SOCK_RAW,
 272         .pr_domain = &inetdomain,
 273         .pr_protocol = IPPROTO_AH,
 274         .pr_flags = PR_ATOMIC|PR_ADDR,
 275
 276         .pr_input = ah4_input,
 277         .pr_output = NULL,
 278         .pr_ctlinput = NULL,
 279         .pr_ctloutput = NULL,
 280
 281         .pr_ctlport = NULL,
 282         .pr_usrreqs = &nousrreqs
 283     },
 284 #ifdef IPSEC_ESP
 285     {
 286         .pr_type = SOCK_RAW,
 287         .pr_domain = &inetdomain,
 288         .pr_protocol = IPPROTO_ESP,
 289         .pr_flags = PR_ATOMIC|PR_ADDR,
 290
 291         .pr_input = esp4_input,
 292         .pr_output = NULL,
 293         .pr_ctlinput = NULL,
 294         .pr_ctloutput = NULL,
 295
 296         .pr_ctlport = NULL,
 297         .pr_usrreqs = &nousrreqs
 298     },
 299 #endif
 300     {
 301         .pr_type = SOCK_RAW,
 302         .pr_domain = &inetdomain,
 303         .pr_protocol = IPPROTO_IPCOMP,
 304         .pr_flags = PR_ATOMIC|PR_ADDR,
 305
 306         .pr_input = ipcomp4_input,
 307         .pr_output = 0,
 308         .pr_ctlinput = NULL,
 309         .pr_ctloutput = NULL,
 310
 311         .pr_ctlport = NULL,
 312         .pr_usrreqs = &nousrreqs
 313     },
 314 #endif /* IPSEC */
 315 #ifdef FAST_IPSEC
 316     {
 317         .pr_type = SOCK_RAW,
 318         .pr_domain = &inetdomain,
 319         .pr_protocol = IPPROTO_AH,
 320         .pr_flags = PR_ATOMIC|PR_ADDR,
 321
 322         .pr_input = ipsec4_common_input,
 323         .pr_output = NULL,
 324         .pr_ctlinput = NULL,
 325         .pr_ctloutput = NULL,
 326
 327         .pr_ctlport = NULL,
 328         .pr_usrreqs = &nousrreqs
 329     },
 330     {
 331         .pr_type = SOCK_RAW,
 332         .pr_domain = &inetdomain,
 333         .pr_protocol = IPPROTO_ESP,
 334         .pr_flags = PR_ATOMIC|PR_ADDR,
 335
 336         .pr_input = ipsec4_common_input,
 337         .pr_output = NULL
 338         .pr_ctlinput = NULL,
 339         .pr_ctloutput = NULL,
 340
 341         .pr_ctlport = NULL,
 342         .pr_usrreqs = &nousrreqs
 343     },
 344     {
 345         .pr_type = SOCK_RAW,
 346         .pr_domain = &inetdomain,
 347         .pr_protocol = IPPROTO_IPCOMP,
 348         .pr_flags = PR_ATOMIC|PR_ADDR,
 349
 350         .pr_input = ipsec4_common_input,
 351         .pr_output = NULL,
 352         .pr_ctlinput = NULL,
 353         .pr_ctloutput = NULL,
 354
 355         .pr_ctlport = NULL,
 356         .pr_usrreqs = &nousrreqs
 357     },
 358 #endif /* FAST_IPSEC */
 359     {
 360         .pr_type = SOCK_RAW,
 361         .pr_domain = &inetdomain,
 362         .pr_protocol = IPPROTO_IPV4,
 363         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 364         .pr_input = encap4_input,
 365         .pr_output = NULL,
 366         .pr_ctlinput = NULL,
 367         .pr_ctloutput = rip_ctloutput,
 368
 369         .pr_ctlport = NULL,
 370         .pr_init = encap_init,
 371         .pr_usrreqs = &rip_usrreqs
 372     },
 373     {
 374         .pr_type = SOCK_RAW,
 375         .pr_domain = &inetdomain,
 376         .pr_protocol = IPPROTO_MOBILE,
 377         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 378
 379         .pr_input = encap4_input,
 380         .pr_output = NULL,
 381         .pr_ctlinput = NULL,
 382         .pr_ctloutput = rip_ctloutput,
 383
 384         .pr_ctlport = NULL,
 385         .pr_init = encap_init,
 386         .pr_usrreqs = &rip_usrreqs
 387     },
 388     {
 389         .pr_type = SOCK_RAW,
 390         .pr_domain = &inetdomain,
 391         .pr_protocol = IPPROTO_GRE,
 392         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 393
 394         .pr_input = encap4_input,
 395         .pr_output = NULL,
 396         .pr_ctlinput = NULL,
 397         .pr_ctloutput = rip_ctloutput,
 398
 399         .pr_ctlport = NULL,
 400         .pr_init = encap_init,
 401         .pr_usrreqs = &rip_usrreqs
 402     },
 403 #ifdef INET6
 404     {
 405         .pr_type = SOCK_RAW,
 406         .pr_domain = &inetdomain,
 407         .pr_protocol = IPPROTO_IPV6,
 408         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 409
 410         .pr_input = encap4_input,
 411         .pr_output = NULL,
 412         .pr_ctlinput = NULL,
 413         .pr_ctloutput = rip_ctloutput,
 414
 415         .pr_ctlport = NULL,
 416         .pr_init = encap_init,
 417         .pr_usrreqs = &rip_usrreqs
 418     },
 419 #endif
 420 #ifdef IPDIVERT
 421     {
 422         .pr_type = SOCK_RAW,
 423         .pr_domain = &inetdomain,
 424         .pr_protocol = IPPROTO_DIVERT,
 425         .pr_flags = PR_ATOMIC|PR_ADDR,
 426
 427         .pr_input = div_input,
 428         .pr_output = NULL,
 429         .pr_ctlinput = NULL,
 430         .pr_ctloutput = ip_ctloutput,
 431
 432         .pr_ctlport = NULL,
 433         .pr_init = div_init,
 434         .pr_usrreqs = &div_usrreqs
 435     },
 436 #endif
 437 #ifdef IPXIP
 438     {
 439         .pr_type = SOCK_RAW,
 440         .pr_domain = &inetdomain,
 441         .pr_protocol = IPPROTO_IDP,
 442         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 443
 444         .pr_input = ipxip_input,
 445         .pr_output = NULL,
 446         .pr_ctlinput = ipxip_ctlinput,
 447         .pr_ctloutput = NULL,
 448
 449         .pr_ctlport = cpu0_ctlport,
 450         .pr_usrreqs = &rip_usrreqs
 451     },
 452 #endif
 453 #ifdef PIM
 454     {
 455         .pr_type = SOCK_RAW,
 456         .pr_domain = &inetdomain,
 457         .pr_protocol = IPPROTO_PIM,
 458         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 459
 460         .pr_input = pim_input,
 461         .pr_output = NULL,
 462         .pr_ctlinput = NULL,
 463         .pr_ctloutput = rip_ctloutput,
 464
 465         .pr_ctlport = NULL,
 466         .pr_usrreqs = &rip_usrreqs
 467     },
 468 #endif
 469 #ifdef NPFSYNC
 470     {
 471         .pr_type = SOCK_RAW,
 472         .pr_domain = &inetdomain,
 473         .pr_protocol = IPPROTO_PFSYNC,
 474         .pr_flags = PR_ATOMIC|PR_ADDR,
 475
 476         .pr_input = pfsync_input,
 477         .pr_output = NULL,
 478         .pr_ctlinput = NULL,
 479         .pr_ctloutput = rip_ctloutput,
 480
 481         .pr_ctlport = NULL,
 482         .pr_usrreqs = &rip_usrreqs
 483     },
 484 #endif  /* NPFSYNC */
 485     {
 486         /* raw wildcard */
 487         .pr_type = SOCK_RAW,
 488         .pr_domain = &inetdomain,
 489         .pr_protocol = 0,
 490         .pr_flags = PR_ATOMIC|PR_ADDR,
 491
 492         .pr_input = rip_input,
 493         .pr_output = NULL,
 494         .pr_ctlinput = NULL,
 495         .pr_ctloutput = rip_ctloutput,
 496
 497         .pr_init = rip_init,
 498         .pr_ctlport = NULL,
 499         .pr_usrreqs = &rip_usrreqs
 500     },
 501 #ifdef CARP
 502     {
 503         .pr_type = SOCK_RAW,
 504         .pr_domain = &inetdomain,
 505         .pr_protocol = IPPROTO_CARP,
 506         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE,
 507
 508         .pr_input = carp_proto_input,
 509         .pr_output = rip_output,
 510         .pr_ctlinput = carp_proto_ctlinput,
 511         .pr_ctloutput = rip_ctloutput,
 512
 513         .pr_ctlport = cpu0_ctlport,
 514         .pr_usrreqs = &rip_usrreqs
 515     },
 516 #endif
 517 };
 518
 519 struct domain inetdomain = {
 520         AF_INET, "internet", NULL, NULL, NULL,
 521         inetsw, &inetsw[NELEM(inetsw)],
 522         SLIST_ENTRY_INITIALIZER,
 523         in_inithead, 32, sizeof(struct sockaddr_in),
 524 };
 525
 526 DOMAIN_SET(inet);
 527
 528 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 529         "Internet Family");
 530
 531 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 532 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 533 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 534 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 535 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 536 #ifdef FAST_IPSEC
 537 /* XXX no protocol # to use, pick something "reserved" */
 538 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 539 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 540 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 541 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 542 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 543 #else
 544 #ifdef IPSEC
 545 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 546 #endif /* IPSEC */
 547 #endif /* !FAST_IPSEC */
 548 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 549 #ifdef IPDIVERT
 550 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 551 #endif
 552 #ifdef PIM
 553 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 554 #endif
 555 #ifdef CARP
 556 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,    CTLFLAG_RW, 0,  "CARP");
 557 #endif