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_mrouting.h"
  35 #include "opt_ipsec.h"
  36 #include "opt_inet6.h"
  37 #include "opt_sctp.h"
  38 #include "opt_carp.h"
  39
  40 #include <sys/param.h>
  41 #include <sys/kernel.h>
  42 #include <sys/socket.h>
  43 #include <sys/domain.h>
  44 #include <sys/protosw.h>
  45 #include <sys/queue.h>
  46 #include <sys/sysctl.h>
  47
  48 #include <net/if.h>
  49 #include <net/route.h>
  50
  51 #include <netinet/in.h>
  52 #include <netinet/in_systm.h>
  53 #include <netinet/in_pcb.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 SCTP
  89 #include <netinet/sctp_pcb.h>
  90 #include <netinet/sctp.h>
  91 #include <netinet/sctp_var.h>
  92 #endif /* SCTP */
  93
  94 #include <net/netisr.h>         /* for cpu0_soport */
  95
  96 #ifdef CARP
  97 #include <netinet/ip_carp.h>
  98 #endif
  99
 100 extern  struct domain inetdomain;
 101 static  struct pr_usrreqs nousrreqs;
 102
 103 struct protosw inetsw[] = {
 104     {
 105         .pr_type = 0,
 106         .pr_domain = &inetdomain,
 107         .pr_protocol = 0,
 108         .pr_flags = 0,
 109
 110         .pr_ctlport = NULL,
 111
 112         .pr_init = ip_init,
 113         .pr_fasttimo = NULL,
 114         .pr_slowtimo = ip_slowtimo,
 115         .pr_drain = ip_drain,
 116         .pr_usrreqs = &nousrreqs
 117     },
 118     {
 119         .pr_type = SOCK_DGRAM,
 120         .pr_domain = &inetdomain,
 121         .pr_protocol = IPPROTO_UDP,
 122         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE|
 123             PR_ASYNC_SEND|PR_ASEND_HOLDTD,
 124
 125         .pr_initport = udp_initport,
 126         .pr_input = udp_input,
 127         .pr_output = NULL,
 128         .pr_ctlinput = udp_ctlinput,
 129         .pr_ctloutput = udp_ctloutput,
 130
 131         .pr_ctlport = udp_ctlport,
 132         .pr_init = udp_init,
 133         .pr_usrreqs = &udp_usrreqs
 134     },
 135     {
 136         .pr_type = SOCK_STREAM,
 137         .pr_domain = &inetdomain,
 138         .pr_protocol = IPPROTO_TCP,
 139         .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_MPSAFE|
 140             PR_ASYNC_SEND|PR_ASYNC_RCVD|PR_ACONN_HOLDTD,
 141
 142         .pr_initport = tcp_initport,
 143         .pr_input = tcp_input,
 144         .pr_output = NULL,
 145         .pr_ctlinput = tcp_ctlinput,
 146         .pr_ctloutput = tcp_ctloutput,
 147
 148         .pr_ctlport = tcp_ctlport,
 149         .pr_init = tcp_init,
 150         .pr_fasttimo = NULL,
 151         .pr_slowtimo = NULL,
 152         .pr_drain = tcp_drain,
 153         .pr_usrreqs = &tcp_usrreqs
 154     },
 155 #ifdef SCTP
 156     /*
 157      * Order is very important here, we add the good one in
 158      * in this postion so it maps to the right ip_protox[]
 159      * postion for SCTP. Don't move the one above below
 160      * this one or IPv6/4 compatability will break
 161      */
 162     {
 163         .pr_type = SOCK_DGRAM,
 164         .pr_domain = &inetdomain,
 165         .pr_protocol = IPPROTO_SCTP,
 166         .pr_flags = PR_ADDR_OPT|PR_WANTRCVD,
 167
 168         .pr_input = sctp_input,
 169         .pr_output = NULL,
 170         .pr_ctlinput = sctp_ctlinput,
 171         .pr_ctloutput = sctp_ctloutput,
 172
 173         .pr_ctlport = cpu0_ctlport,
 174         .pr_init = sctp_init,
 175         .pr_drain = sctp_drain,
 176         .pr_usrreqs = &sctp_usrreqs
 177     },
 178     {
 179         .pr_type = SOCK_SEQPACKET,
 180         .pr_domain = &inetdomain,
 181         .pr_protocol = IPPROTO_SCTP,
 182         .pr_flags = PR_ADDR_OPT|PR_WANTRCVD,
 183
 184         .pr_input = sctp_input,
 185         .pr_output = NULL,
 186         .pr_ctlinput = sctp_ctlinput,
 187         .pr_ctloutput = sctp_ctloutput,
 188
 189         .pr_ctlport = cpu0_ctlport,
 190         .pr_drain = sctp_drain,
 191         .pr_usrreqs = &sctp_usrreqs
 192     },
 193
 194     {
 195         .pr_type = SOCK_STREAM,
 196         .pr_domain = &inetdomain,
 197         .pr_protocol = IPPROTO_SCTP,
 198         .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD,
 199
 200         .pr_input = sctp_input,
 201         .pr_output = NULL,
 202         .pr_ctlinput = sctp_ctlinput,
 203         .pr_ctloutput = sctp_ctloutput,
 204
 205         .pr_ctlport = cpu0_ctlport,
 206         .pr_drain = sctp_drain,
 207         .pr_usrreqs = &sctp_usrreqs
 208     },
 209 #endif /* SCTP */
 210     {
 211         .pr_type = SOCK_RAW,
 212         .pr_domain = &inetdomain,
 213         .pr_protocol = IPPROTO_RAW,
 214         .pr_flags = PR_ATOMIC|PR_ADDR,
 215
 216         .pr_input = rip_input,
 217         .pr_output = NULL,
 218         .pr_ctlinput = rip_ctlinput,
 219         .pr_ctloutput = rip_ctloutput,
 220
 221         .pr_ctlport = cpu0_ctlport,
 222         .pr_usrreqs = &rip_usrreqs
 223     },
 224     {
 225         .pr_type = SOCK_RAW,
 226         .pr_domain = &inetdomain,
 227         .pr_protocol = IPPROTO_ICMP,
 228         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE,
 229
 230         .pr_input = icmp_input,
 231         .pr_output = NULL,
 232         .pr_ctlinput = NULL,
 233         .pr_ctloutput = rip_ctloutput,
 234
 235         .pr_usrreqs = &rip_usrreqs
 236     },
 237     {
 238         .pr_type = SOCK_RAW,
 239         .pr_domain = &inetdomain,
 240         .pr_protocol = IPPROTO_IGMP,
 241         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 242
 243         .pr_input = igmp_input,
 244         .pr_output = NULL,
 245         .pr_ctlinput = NULL,
 246         .pr_ctloutput = rip_ctloutput,
 247
 248         .pr_init = igmp_init,
 249         .pr_fasttimo = igmp_fasttimo,
 250         .pr_slowtimo = igmp_slowtimo,
 251         .pr_drain = NULL,
 252         .pr_usrreqs = &rip_usrreqs
 253     },
 254     {
 255         .pr_type = SOCK_RAW,
 256         .pr_domain = &inetdomain,
 257         .pr_protocol = IPPROTO_RSVP,
 258         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 259
 260         .pr_input = rsvp_input,
 261         .pr_output = NULL,
 262         .pr_ctlinput = NULL,
 263         .pr_ctloutput = rip_ctloutput,
 264
 265         .pr_usrreqs = &rip_usrreqs
 266     },
 267 #ifdef IPSEC
 268     {
 269         .pr_type = SOCK_RAW,
 270         .pr_domain = &inetdomain,
 271         .pr_protocol = IPPROTO_AH,
 272         .pr_flags = PR_ATOMIC|PR_ADDR,
 273
 274         .pr_input = ah4_input,
 275         .pr_output = NULL,
 276         .pr_ctlinput = NULL,
 277         .pr_ctloutput = NULL,
 278
 279         .pr_ctlport = NULL,
 280         .pr_usrreqs = &nousrreqs
 281     },
 282 #ifdef IPSEC_ESP
 283     {
 284         .pr_type = SOCK_RAW,
 285         .pr_domain = &inetdomain,
 286         .pr_protocol = IPPROTO_ESP,
 287         .pr_flags = PR_ATOMIC|PR_ADDR,
 288
 289         .pr_input = esp4_input,
 290         .pr_output = NULL,
 291         .pr_ctlinput = NULL,
 292         .pr_ctloutput = NULL,
 293
 294         .pr_ctlport = NULL,
 295         .pr_usrreqs = &nousrreqs
 296     },
 297 #endif
 298     {
 299         .pr_type = SOCK_RAW,
 300         .pr_domain = &inetdomain,
 301         .pr_protocol = IPPROTO_IPCOMP,
 302         .pr_flags = PR_ATOMIC|PR_ADDR,
 303
 304         .pr_input = ipcomp4_input,
 305         .pr_output = 0,
 306         .pr_ctlinput = NULL,
 307         .pr_ctloutput = NULL,
 308
 309         .pr_ctlport = NULL,
 310         .pr_usrreqs = &nousrreqs
 311     },
 312 #endif /* IPSEC */
 313 #ifdef FAST_IPSEC
 314     {
 315         .pr_type = SOCK_RAW,
 316         .pr_domain = &inetdomain,
 317         .pr_protocol = IPPROTO_AH,
 318         .pr_flags = PR_ATOMIC|PR_ADDR,
 319
 320         .pr_input = ipsec4_common_input,
 321         .pr_output = NULL,
 322         .pr_ctlinput = NULL,
 323         .pr_ctloutput = NULL,
 324
 325         .pr_ctlport = NULL,
 326         .pr_usrreqs = &nousrreqs
 327     },
 328     {
 329         .pr_type = SOCK_RAW,
 330         .pr_domain = &inetdomain,
 331         .pr_protocol = IPPROTO_ESP,
 332         .pr_flags = PR_ATOMIC|PR_ADDR,
 333
 334         .pr_input = ipsec4_common_input,
 335         .pr_output = NULL,
 336         .pr_ctlinput = NULL,
 337         .pr_ctloutput = NULL,
 338
 339         .pr_ctlport = NULL,
 340         .pr_usrreqs = &nousrreqs
 341     },
 342     {
 343         .pr_type = SOCK_RAW,
 344         .pr_domain = &inetdomain,
 345         .pr_protocol = IPPROTO_IPCOMP,
 346         .pr_flags = PR_ATOMIC|PR_ADDR,
 347
 348         .pr_input = ipsec4_common_input,
 349         .pr_output = NULL,
 350         .pr_ctlinput = NULL,
 351         .pr_ctloutput = NULL,
 352
 353         .pr_ctlport = NULL,
 354         .pr_usrreqs = &nousrreqs
 355     },
 356 #endif /* FAST_IPSEC */
 357     {
 358         .pr_type = SOCK_RAW,
 359         .pr_domain = &inetdomain,
 360         .pr_protocol = IPPROTO_IPV4,
 361         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 362         .pr_input = encap4_input,
 363         .pr_output = NULL,
 364         .pr_ctlinput = NULL,
 365         .pr_ctloutput = rip_ctloutput,
 366
 367         .pr_ctlport = NULL,
 368         .pr_init = encap_init,
 369         .pr_usrreqs = &rip_usrreqs
 370     },
 371     {
 372         .pr_type = SOCK_RAW,
 373         .pr_domain = &inetdomain,
 374         .pr_protocol = IPPROTO_MOBILE,
 375         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 376
 377         .pr_input = encap4_input,
 378         .pr_output = NULL,
 379         .pr_ctlinput = NULL,
 380         .pr_ctloutput = rip_ctloutput,
 381
 382         .pr_ctlport = NULL,
 383         .pr_init = encap_init,
 384         .pr_usrreqs = &rip_usrreqs
 385     },
 386     {
 387         .pr_type = SOCK_RAW,
 388         .pr_domain = &inetdomain,
 389         .pr_protocol = IPPROTO_GRE,
 390         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 391
 392         .pr_input = encap4_input,
 393         .pr_output = NULL,
 394         .pr_ctlinput = NULL,
 395         .pr_ctloutput = rip_ctloutput,
 396
 397         .pr_ctlport = NULL,
 398         .pr_init = encap_init,
 399         .pr_usrreqs = &rip_usrreqs
 400     },
 401 #ifdef INET6
 402     {
 403         .pr_type = SOCK_RAW,
 404         .pr_domain = &inetdomain,
 405         .pr_protocol = IPPROTO_IPV6,
 406         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 407
 408         .pr_input = encap4_input,
 409         .pr_output = NULL,
 410         .pr_ctlinput = NULL,
 411         .pr_ctloutput = rip_ctloutput,
 412
 413         .pr_ctlport = NULL,
 414         .pr_init = encap_init,
 415         .pr_usrreqs = &rip_usrreqs
 416     },
 417 #endif
 418 #ifdef IPDIVERT
 419     {
 420         .pr_type = SOCK_RAW,
 421         .pr_domain = &inetdomain,
 422         .pr_protocol = IPPROTO_DIVERT,
 423         .pr_flags = PR_ATOMIC|PR_ADDR,
 424
 425         .pr_input = div_input,
 426         .pr_output = NULL,
 427         .pr_ctlinput = NULL,
 428         .pr_ctloutput = ip_ctloutput,
 429
 430         .pr_ctlport = NULL,
 431         .pr_init = div_init,
 432         .pr_usrreqs = &div_usrreqs
 433     },
 434 #endif
 435 #ifdef PIM
 436     {
 437         .pr_type = SOCK_RAW,
 438         .pr_domain = &inetdomain,
 439         .pr_protocol = IPPROTO_PIM,
 440         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 441
 442         .pr_input = pim_input,
 443         .pr_output = NULL,
 444         .pr_ctlinput = NULL,
 445         .pr_ctloutput = rip_ctloutput,
 446
 447         .pr_ctlport = NULL,
 448         .pr_usrreqs = &rip_usrreqs
 449     },
 450 #endif
 451 #ifdef NPFSYNC
 452     {
 453         .pr_type = SOCK_RAW,
 454         .pr_domain = &inetdomain,
 455         .pr_protocol = IPPROTO_PFSYNC,
 456         .pr_flags = PR_ATOMIC|PR_ADDR,
 457
 458         .pr_input = pfsync_input,
 459         .pr_output = NULL,
 460         .pr_ctlinput = NULL,
 461         .pr_ctloutput = rip_ctloutput,
 462
 463         .pr_ctlport = NULL,
 464         .pr_usrreqs = &rip_usrreqs
 465     },
 466 #endif  /* NPFSYNC */
 467     {
 468         /* raw wildcard */
 469         .pr_type = SOCK_RAW,
 470         .pr_domain = &inetdomain,
 471         .pr_protocol = 0,
 472         .pr_flags = PR_ATOMIC|PR_ADDR,
 473
 474         .pr_input = rip_input,
 475         .pr_output = NULL,
 476         .pr_ctlinput = NULL,
 477         .pr_ctloutput = rip_ctloutput,
 478
 479         .pr_init = rip_init,
 480         .pr_ctlport = NULL,
 481         .pr_usrreqs = &rip_usrreqs
 482     },
 483 #ifdef CARP
 484     {
 485         .pr_type = SOCK_RAW,
 486         .pr_domain = &inetdomain,
 487         .pr_protocol = IPPROTO_CARP,
 488         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE,
 489
 490         .pr_input = carp_proto_input,
 491         .pr_output = rip_output,
 492         .pr_ctlinput = carp_proto_ctlinput,
 493         .pr_ctloutput = rip_ctloutput,
 494
 495         .pr_ctlport = cpu0_ctlport,
 496         .pr_usrreqs = &rip_usrreqs
 497     },
 498 #endif
 499 };
 500
 501 static void
 502 inetdomain_init(void)
 503 {
 504         in_pcbglobalinit();
 505 }
 506
 507 struct domain inetdomain = {
 508         AF_INET, "internet", inetdomain_init, NULL, NULL,
 509         inetsw, &inetsw[NELEM(inetsw)],
 510         SLIST_ENTRY_INITIALIZER,
 511         in_inithead, 32, sizeof(struct sockaddr_in),
 512 };
 513
 514 DOMAIN_SET(inet);
 515
 516 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 517         "Internet Family");
 518
 519 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 520 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 521 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 522 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 523 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 524 #ifdef FAST_IPSEC
 525 /* XXX no protocol # to use, pick something "reserved" */
 526 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 527 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 528 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 529 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 530 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 531 #else
 532 #ifdef IPSEC
 533 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 534 #endif /* IPSEC */
 535 #endif /* !FAST_IPSEC */
 536 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 537 #ifdef IPDIVERT
 538 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 539 #endif
 540 #ifdef PIM
 541 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 542 #endif
 543 #ifdef CARP
 544 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,    CTLFLAG_RW, 0,  "CARP");
 545 #endif