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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
  34  * $FreeBSD: src/sys/netinet/in_proto.c,v 1.53.2.7 2003/08/24 08:24:38 hsu Exp $
  35  * $DragonFly: src/sys/netinet/in_proto.c,v 1.17 2008/10/27 02:56:30 sephe Exp $
  36  */
  37
  38 #include "opt_ipdivert.h"
  39 #include "opt_ipx.h"
  40 #include "opt_mrouting.h"
  41 #include "opt_ipsec.h"
  42 #include "opt_inet6.h"
  43 #include "opt_sctp.h"
  44 #include "opt_carp.h"
  45
  46 #include <sys/param.h>
  47 #include <sys/kernel.h>
  48 #include <sys/socket.h>
  49 #include <sys/domain.h>
  50 #include <sys/protosw.h>
  51 #include <sys/queue.h>
  52 #include <sys/sysctl.h>
  53
  54 #include <net/if.h>
  55 #include <net/route.h>
  56
  57 #include <netinet/in.h>
  58 #include <netinet/in_systm.h>
  59 #include <netinet/ip.h>
  60 #include <netinet/ip_var.h>
  61 #include <netinet/ip_icmp.h>
  62 #include <netinet/igmp_var.h>
  63 #ifdef PIM
  64 #include <netinet/pim_var.h>
  65 #endif
  66 #include <netinet/tcp.h>
  67 #include <netinet/tcp_timer.h>
  68 #include <netinet/tcp_var.h>
  69 #include <netinet/udp.h>
  70 #include <netinet/udp_var.h>
  71 #include <netinet/ip_encap.h>
  72 #ifdef IPDIVERT
  73 #include <netinet/ip_divert.h>
  74 #endif
  75
  76 /*
  77  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  78  */
  79
  80 #ifdef IPSEC
  81 #include <netinet6/ipsec.h>
  82 #include <netinet6/ah.h>
  83 #ifdef IPSEC_ESP
  84 #include <netinet6/esp.h>
  85 #endif
  86 #include <netinet6/ipcomp.h>
  87 #endif /* IPSEC */
  88
  89 #ifdef FAST_IPSEC
  90 #include <netproto/ipsec/ipsec.h>
  91 #endif /* FAST_IPSEC */
  92
  93 #ifdef IPXIP
  94 #include <netproto/ipx/ipx_ip.h>
  95 #endif
  96
  97 #ifdef NSIP
  98 #include <netns/ns.h>
  99 #include <netns/ns_if.h>
 100 #endif
 101
 102 #ifdef SCTP
 103 #include <netinet/in_pcb.h>
 104 #include <netinet/sctp_pcb.h>
 105 #include <netinet/sctp.h>
 106 #include <netinet/sctp_var.h>
 107 #endif /* SCTP */
 108
 109 #include <net/netisr.h>         /* for cpu0_soport */
 110
 111 #ifdef CARP
 112 #include <netinet/ip_carp.h>
 113 #endif
 114
 115 extern  struct domain inetdomain;
 116 static  struct pr_usrreqs nousrreqs;
 117
 118 struct protosw inetsw[] = {
 119     {
 120         .pr_type = 0,
 121         .pr_domain = &inetdomain,
 122         .pr_protocol = 0,
 123         .pr_flags = 0,
 124
 125         .pr_ctlport = NULL,
 126
 127         .pr_init = ip_init,
 128         .pr_fasttimo = NULL,
 129         .pr_slowtimo = ip_slowtimo,
 130         .pr_drain = ip_drain,
 131         .pr_usrreqs = &nousrreqs
 132     },
 133     {
 134         .pr_type = SOCK_DGRAM,
 135         .pr_domain = &inetdomain,
 136         .pr_protocol = IPPROTO_UDP,
 137         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE,
 138
 139         .pr_input = udp_input,
 140         .pr_output = NULL,
 141         .pr_ctlinput = udp_ctlinput,
 142         .pr_ctloutput = ip_ctloutput,
 143
 144         .pr_ctlport = udp_ctlport,
 145         .pr_init = udp_init,
 146         .pr_usrreqs = &udp_usrreqs
 147     },
 148     {
 149         .pr_type = SOCK_STREAM,
 150         .pr_domain = &inetdomain,
 151         .pr_protocol = IPPROTO_TCP,
 152         .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_MPSAFE,
 153
 154         .pr_input = tcp_input,
 155         .pr_output = NULL,
 156         .pr_ctlinput = tcp_ctlinput,
 157         .pr_ctloutput = tcp_ctloutput,
 158
 159         .pr_ctlport = tcp_ctlport,
 160         .pr_init = tcp_init,
 161         .pr_fasttimo = NULL,
 162         .pr_slowtimo = tcp_slowtimo,
 163         .pr_drain = tcp_drain,
 164         .pr_usrreqs = &tcp_usrreqs
 165     },
 166 #ifdef SCTP
 167     /*
 168      * Order is very important here, we add the good one in
 169      * in this postion so it maps to the right ip_protox[]
 170      * postion for SCTP. Don't move the one above below
 171      * this one or IPv6/4 compatability will break
 172      */
 173     {
 174         .pr_type = SOCK_DGRAM,
 175         .pr_domain = &inetdomain,
 176         .pr_protocol = IPPROTO_SCTP,
 177         .pr_flags = PR_ADDR_OPT|PR_WANTRCVD,
 178
 179         .pr_input = sctp_input,
 180         .pr_output = NULL,
 181         .pr_ctlinput = sctp_ctlinput,
 182         .pr_ctloutput = sctp_ctloutput,
 183
 184         .pr_ctlport = cpu0_ctlport,
 185         .pr_init = sctp_init,
 186         .pr_drain = sctp_drain,
 187         .pr_usrreqs = &sctp_usrreqs
 188     },
 189     {
 190         .pr_type = SOCK_SEQPACKET,
 191         .pr_domain = &inetdomain,
 192         .pr_protocol = IPPROTO_SCTP,
 193         .pr_flags = PR_ADDR_OPT|PR_WANTRCVD,
 194
 195         .pr_input = sctp_input,
 196         .pr_output = NULL,
 197         .pr_ctlinput = sctp_ctlinput,
 198         .pr_ctloutput = sctp_ctloutput,
 199
 200         .pr_ctlport = cpu0_ctlport,
 201         .pr_drain = sctp_drain,
 202         .pr_usrreqs = &sctp_usrreqs
 203     },
 204
 205     {
 206         .pr_type = SOCK_STREAM,
 207         .pr_domain = &inetdomain,
 208         .pr_protocol = IPPROTO_SCTP,
 209         .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD,
 210
 211         .pr_input = sctp_input,
 212         .pr_output = NULL,
 213         .pr_ctlinput = sctp_ctlinput,
 214         .pr_ctloutput = sctp_ctloutput,
 215
 216         .pr_ctlport = cpu0_ctlport,
 217         .pr_drain = sctp_drain,
 218         .pr_usrreqs = &sctp_usrreqs
 219     },
 220 #endif /* SCTP */
 221     {
 222         .pr_type = SOCK_RAW,
 223         .pr_domain = &inetdomain,
 224         .pr_protocol = IPPROTO_RAW,
 225         .pr_flags = PR_ATOMIC|PR_ADDR,
 226
 227         .pr_input = rip_input,
 228         .pr_output = NULL,
 229         .pr_ctlinput = rip_ctlinput,
 230         .pr_ctloutput = rip_ctloutput,
 231
 232         .pr_ctlport = cpu0_ctlport,
 233         .pr_usrreqs = &rip_usrreqs
 234     },
 235     {
 236         .pr_type = SOCK_RAW,
 237         .pr_domain = &inetdomain,
 238         .pr_protocol = IPPROTO_ICMP,
 239         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 240
 241         .pr_input = icmp_input,
 242         .pr_output = NULL,
 243         .pr_ctlinput = NULL,
 244         .pr_ctloutput = rip_ctloutput,
 245
 246         .pr_usrreqs = &rip_usrreqs
 247     },
 248     {
 249         .pr_type = SOCK_RAW,
 250         .pr_domain = &inetdomain,
 251         .pr_protocol = IPPROTO_IGMP,
 252         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 253
 254         .pr_input = igmp_input,
 255         .pr_output = NULL,
 256         .pr_ctlinput = NULL,
 257         .pr_ctloutput = rip_ctloutput,
 258
 259         .pr_init = igmp_init,
 260         .pr_fasttimo = igmp_fasttimo,
 261         .pr_slowtimo = igmp_slowtimo,
 262         .pr_drain = NULL,
 263         .pr_usrreqs = &rip_usrreqs
 264     },
 265     {
 266         .pr_type = SOCK_RAW,
 267         .pr_domain = &inetdomain,
 268         .pr_protocol = IPPROTO_RSVP,
 269         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 270
 271         .pr_input = rsvp_input,
 272         .pr_output = NULL,
 273         .pr_ctlinput = NULL,
 274         .pr_ctloutput = rip_ctloutput,
 275
 276         .pr_usrreqs = &rip_usrreqs
 277     },
 278 #ifdef IPSEC
 279     {
 280         .pr_type = SOCK_RAW,
 281         .pr_domain = &inetdomain,
 282         .pr_protocol = IPPROTO_AH,
 283         .pr_flags = PR_ATOMIC|PR_ADDR,
 284
 285         .pr_input = ah4_input,
 286         .pr_output = NULL,
 287         .pr_ctlinput = NULL,
 288         .pr_ctloutput = NULL,
 289
 290         .pr_ctlport = NULL,
 291         .pr_usrreqs = &nousrreqs
 292     },
 293 #ifdef IPSEC_ESP
 294     {
 295         .pr_type = SOCK_RAW,
 296         .pr_domain = &inetdomain,
 297         .pr_protocol = IPPROTO_ESP,
 298         .pr_flags = PR_ATOMIC|PR_ADDR,
 299
 300         .pr_input = esp4_input,
 301         .pr_output = NULL,
 302         .pr_ctlinput = NULL,
 303         .pr_ctloutput = NULL,
 304
 305         .pr_ctlport = NULL,
 306         .pr_usrreqs = &nousrreqs
 307     },
 308 #endif
 309     {
 310         .pr_type = SOCK_RAW,
 311         .pr_domain = &inetdomain,
 312         .pr_protocol = IPPROTO_IPCOMP,
 313         .pr_flags = PR_ATOMIC|PR_ADDR,
 314
 315         .pr_input = ipcomp4_input,
 316         .pr_output = 0,
 317         .pr_ctlinput = NULL,
 318         .pr_ctloutput = NULL,
 319
 320         .pr_ctlport = NULL,
 321         .pr_usrreqs = &nousrreqs
 322     },
 323 #endif /* IPSEC */
 324 #ifdef FAST_IPSEC
 325     {
 326         .pr_type = SOCK_RAW,
 327         .pr_domain = &inetdomain,
 328         .pr_protocol = IPPROTO_AH,
 329         .pr_flags = PR_ATOMIC|PR_ADDR,
 330
 331         .pr_input = ipsec4_common_input,
 332         .pr_output = NULL,
 333         .pr_ctlinput = NULL,
 334         .pr_ctloutput = NULL,
 335
 336         .pr_ctlport = NULL,
 337         .pr_usrreqs = &nousrreqs
 338     },
 339     {
 340         .pr_type = SOCK_RAW,
 341         .pr_domain = &inetdomain,
 342         .pr_protocol = IPPROTO_ESP,
 343         .pr_flags = PR_ATOMIC|PR_ADDR,
 344
 345         .pr_input = ipsec4_common_input,
 346         .pr_output = NULL
 347         .pr_ctlinput = NULL,
 348         .pr_ctloutput = NULL,
 349
 350         .pr_ctlport = NULL,
 351         .pr_usrreqs = &nousrreqs
 352     },
 353     {
 354         .pr_type = SOCK_RAW,
 355         .pr_domain = &inetdomain,
 356         .pr_protocol = IPPROTO_IPCOMP,
 357         .pr_flags = PR_ATOMIC|PR_ADDR,
 358
 359         .pr_input = ipsec4_common_input,
 360         .pr_output = NULL,
 361         .pr_ctlinput = NULL,
 362         .pr_ctloutput = NULL,
 363
 364         .pr_ctlport = NULL,
 365         .pr_usrreqs = &nousrreqs
 366     },
 367 #endif /* FAST_IPSEC */
 368     {
 369         .pr_type = SOCK_RAW,
 370         .pr_domain = &inetdomain,
 371         .pr_protocol = IPPROTO_IPV4,
 372         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 373         .pr_input = encap4_input,
 374         .pr_output = NULL,
 375         .pr_ctlinput = NULL,
 376         .pr_ctloutput = rip_ctloutput,
 377
 378         .pr_ctlport = NULL,
 379         .pr_init = encap_init,
 380         .pr_usrreqs = &rip_usrreqs
 381     },
 382     {
 383         .pr_type = SOCK_RAW,
 384         .pr_domain = &inetdomain,
 385         .pr_protocol = IPPROTO_MOBILE,
 386         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 387
 388         .pr_input = encap4_input,
 389         .pr_output = NULL,
 390         .pr_ctlinput = NULL,
 391         .pr_ctloutput = rip_ctloutput,
 392
 393         .pr_ctlport = NULL,
 394         .pr_init = encap_init,
 395         .pr_usrreqs = &rip_usrreqs
 396     },
 397     {
 398         .pr_type = SOCK_RAW,
 399         .pr_domain = &inetdomain,
 400         .pr_protocol = IPPROTO_GRE,
 401         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 402
 403         .pr_input = encap4_input,
 404         .pr_output = NULL,
 405         .pr_ctlinput = NULL,
 406         .pr_ctloutput = rip_ctloutput,
 407
 408         .pr_ctlport = NULL,
 409         .pr_init = encap_init,
 410         .pr_usrreqs = &rip_usrreqs
 411     },
 412 #ifdef INET6
 413     {
 414         .pr_type = SOCK_RAW,
 415         .pr_domain = &inetdomain,
 416         .pr_protocol = IPPROTO_IPV6,
 417         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 418
 419         .pr_input = encap4_input,
 420         .pr_output = NULL,
 421         .pr_ctlinput = NULL,
 422         .pr_ctloutput = rip_ctloutput,
 423
 424         .pr_ctlport = NULL,
 425         .pr_init = encap_init,
 426         .pr_usrreqs = &rip_usrreqs
 427     },
 428 #endif
 429 #ifdef IPDIVERT
 430     {
 431         .pr_type = SOCK_RAW,
 432         .pr_domain = &inetdomain,
 433         .pr_protocol = IPPROTO_DIVERT,
 434         .pr_flags = PR_ATOMIC|PR_ADDR,
 435
 436         .pr_input = div_input,
 437         .pr_output = NULL,
 438         .pr_ctlinput = NULL,
 439         .pr_ctloutput = ip_ctloutput,
 440
 441         .pr_ctlport = NULL,
 442         .pr_init = div_init,
 443         .pr_usrreqs = &div_usrreqs
 444     },
 445 #endif
 446 #ifdef IPXIP
 447     {
 448         .pr_type = SOCK_RAW,
 449         .pr_domain = &inetdomain,
 450         .pr_protocol = IPPROTO_IDP,
 451         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 452
 453         .pr_input = ipxip_input,
 454         .pr_output = NULL,
 455         .pr_ctlinput = ipxip_ctlinput,
 456         .pr_ctloutput = NULL,
 457
 458         .pr_ctlport = cpu0_ctlport,
 459         .pr_usrreqs = &rip_usrreqs
 460     },
 461 #endif
 462 #ifdef NSIP
 463     {
 464         .pr_type = SOCK_RAW,
 465         .pr_domain = &inetdomain,
 466         .pr_protocol = IPPROTO_IDP,
 467         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 468
 469         .pr_input = idpip_input,
 470         .pr_output = NULL,
 471         .pr_ctlinput = nsip_ctlinput,
 472         .pr_ctloutput = NULL,
 473
 474         .pr_ctlport = cpu0_ctlport,
 475         .pr_usrreqs = &rip_usrreqs
 476     },
 477 #endif
 478 #ifdef PIM
 479     {
 480         .pr_type = SOCK_RAW,
 481         .pr_domain = &inetdomain,
 482         .pr_protocol = IPPROTO_PIM,
 483         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 484
 485         .pr_input = pim_input,
 486         .pr_output = NULL,
 487         .pr_ctlinput = NULL,
 488         .pr_ctloutput = rip_ctloutput,
 489
 490         .pr_ctlport = NULL,
 491         .pr_usrreqs = &rip_usrreqs
 492     },
 493 #endif
 494 #ifdef NPFSYNC
 495     {
 496         .pr_type = SOCK_RAW,
 497         .pr_domain = &inetdomain,
 498         .pr_protocol = IPPROTO_PFSYNC,
 499         .pr_flags = PR_ATOMIC|PR_ADDR,
 500
 501         .pr_input = pfsync_input,
 502         .pr_output = NULL,
 503         .pr_ctlinput = NULL,
 504         .pr_ctloutput = rip_ctloutput,
 505
 506         .pr_ctlport = NULL,
 507         .pr_usrreqs = &rip_usrreqs
 508     },
 509 #endif  /* NPFSYNC */
 510     {
 511         /* raw wildcard */
 512         .pr_type = SOCK_RAW,
 513         .pr_domain = &inetdomain,
 514         .pr_protocol = 0,
 515         .pr_flags = PR_ATOMIC|PR_ADDR,
 516
 517         .pr_input = rip_input,
 518         .pr_output = NULL,
 519         .pr_ctlinput = NULL,
 520         .pr_ctloutput = rip_ctloutput,
 521
 522         .pr_init = rip_init,
 523         .pr_ctlport = NULL,
 524         .pr_usrreqs = &rip_usrreqs
 525     },
 526 #ifdef CARP
 527     {
 528         .pr_type = SOCK_RAW,
 529         .pr_domain = &inetdomain,
 530         .pr_protocol = IPPROTO_CARP,
 531         .pr_flags = PR_ATOMIC|PR_ADDR,
 532
 533         .pr_input = carp_input,
 534         .pr_output = rip_output,
 535         .pr_ctlinput = NULL,
 536         .pr_ctloutput = rip_ctloutput,
 537
 538         .pr_ctlport = NULL,
 539         .pr_usrreqs = &rip_usrreqs
 540     },
 541 #endif
 542 };
 543
 544 struct domain inetdomain = {
 545         AF_INET, "internet", NULL, NULL, NULL,
 546         inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 547         SLIST_ENTRY_INITIALIZER,
 548         in_inithead, 32, sizeof(struct sockaddr_in),
 549 };
 550
 551 DOMAIN_SET(inet);
 552
 553 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 554         "Internet Family");
 555
 556 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 557 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 558 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 559 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 560 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 561 #ifdef FAST_IPSEC
 562 /* XXX no protocol # to use, pick something "reserved" */
 563 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 564 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 565 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 566 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 567 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 568 #else
 569 #ifdef IPSEC
 570 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 571 #endif /* IPSEC */
 572 #endif /* !FAST_IPSEC */
 573 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 574 #ifdef IPDIVERT
 575 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 576 #endif
 577 #ifdef PIM
 578 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 579 #endif
 580 #ifdef CARP
 581 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,    CTLFLAG_RW, 0,  "CARP");
 582 #endif