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