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/ip.h>
  54 #include <netinet/ip_var.h>
  55 #include <netinet/ip_icmp.h>
  56 #include <netinet/igmp_var.h>
  57 #ifdef PIM
  58 #include <netinet/pim_var.h>
  59 #endif
  60 #include <netinet/tcp.h>
  61 #include <netinet/tcp_timer.h>
  62 #include <netinet/tcp_var.h>
  63 #include <netinet/udp.h>
  64 #include <netinet/udp_var.h>
  65 #include <netinet/ip_encap.h>
  66 #ifdef IPDIVERT
  67 #include <netinet/ip_divert.h>
  68 #endif
  69
  70 /*
  71  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  72  */
  73
  74 #ifdef IPSEC
  75 #include <netinet6/ipsec.h>
  76 #include <netinet6/ah.h>
  77 #ifdef IPSEC_ESP
  78 #include <netinet6/esp.h>
  79 #endif
  80 #include <netinet6/ipcomp.h>
  81 #endif /* IPSEC */
  82
  83 #ifdef FAST_IPSEC
  84 #include <netproto/ipsec/ipsec.h>
  85 #endif /* FAST_IPSEC */
  86
  87 #ifdef SCTP
  88 #include <netinet/in_pcb.h>
  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_input = udp_input,
 126         .pr_output = NULL,
 127         .pr_ctlinput = udp_ctlinput,
 128         .pr_ctloutput = ip_ctloutput,
 129
 130         .pr_ctlport = udp_ctlport,
 131         .pr_init = udp_init,
 132         .pr_usrreqs = &udp_usrreqs
 133     },
 134     {
 135         .pr_type = SOCK_STREAM,
 136         .pr_domain = &inetdomain,
 137         .pr_protocol = IPPROTO_TCP,
 138         .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_MPSAFE|
 139             PR_ASYNC_SEND|PR_ASYNC_RCVD|PR_ACONN_HOLDTD|
 140             PR_RAND_INITPORT,
 141
 142         .pr_input = tcp_input,
 143         .pr_output = NULL,
 144         .pr_ctlinput = tcp_ctlinput,
 145         .pr_ctloutput = tcp_ctloutput,
 146
 147         .pr_ctlport = tcp_ctlport,
 148         .pr_init = tcp_init,
 149         .pr_fasttimo = NULL,
 150         .pr_slowtimo = NULL,
 151         .pr_drain = tcp_drain,
 152         .pr_usrreqs = &tcp_usrreqs
 153     },
 154 #ifdef SCTP
 155     /*
 156      * Order is very important here, we add the good one in
 157      * in this postion so it maps to the right ip_protox[]
 158      * postion for SCTP. Don't move the one above below
 159      * this one or IPv6/4 compatability will break
 160      */
 161     {
 162         .pr_type = SOCK_DGRAM,
 163         .pr_domain = &inetdomain,
 164         .pr_protocol = IPPROTO_SCTP,
 165         .pr_flags = PR_ADDR_OPT|PR_WANTRCVD,
 166
 167         .pr_input = sctp_input,
 168         .pr_output = NULL,
 169         .pr_ctlinput = sctp_ctlinput,
 170         .pr_ctloutput = sctp_ctloutput,
 171
 172         .pr_ctlport = cpu0_ctlport,
 173         .pr_init = sctp_init,
 174         .pr_drain = sctp_drain,
 175         .pr_usrreqs = &sctp_usrreqs
 176     },
 177     {
 178         .pr_type = SOCK_SEQPACKET,
 179         .pr_domain = &inetdomain,
 180         .pr_protocol = IPPROTO_SCTP,
 181         .pr_flags = PR_ADDR_OPT|PR_WANTRCVD,
 182
 183         .pr_input = sctp_input,
 184         .pr_output = NULL,
 185         .pr_ctlinput = sctp_ctlinput,
 186         .pr_ctloutput = sctp_ctloutput,
 187
 188         .pr_ctlport = cpu0_ctlport,
 189         .pr_drain = sctp_drain,
 190         .pr_usrreqs = &sctp_usrreqs
 191     },
 192
 193     {
 194         .pr_type = SOCK_STREAM,
 195         .pr_domain = &inetdomain,
 196         .pr_protocol = IPPROTO_SCTP,
 197         .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD,
 198
 199         .pr_input = sctp_input,
 200         .pr_output = NULL,
 201         .pr_ctlinput = sctp_ctlinput,
 202         .pr_ctloutput = sctp_ctloutput,
 203
 204         .pr_ctlport = cpu0_ctlport,
 205         .pr_drain = sctp_drain,
 206         .pr_usrreqs = &sctp_usrreqs
 207     },
 208 #endif /* SCTP */
 209     {
 210         .pr_type = SOCK_RAW,
 211         .pr_domain = &inetdomain,
 212         .pr_protocol = IPPROTO_RAW,
 213         .pr_flags = PR_ATOMIC|PR_ADDR,
 214
 215         .pr_input = rip_input,
 216         .pr_output = NULL,
 217         .pr_ctlinput = rip_ctlinput,
 218         .pr_ctloutput = rip_ctloutput,
 219
 220         .pr_ctlport = cpu0_ctlport,
 221         .pr_usrreqs = &rip_usrreqs
 222     },
 223     {
 224         .pr_type = SOCK_RAW,
 225         .pr_domain = &inetdomain,
 226         .pr_protocol = IPPROTO_ICMP,
 227         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE,
 228
 229         .pr_input = icmp_input,
 230         .pr_output = NULL,
 231         .pr_ctlinput = NULL,
 232         .pr_ctloutput = rip_ctloutput,
 233
 234         .pr_usrreqs = &rip_usrreqs
 235     },
 236     {
 237         .pr_type = SOCK_RAW,
 238         .pr_domain = &inetdomain,
 239         .pr_protocol = IPPROTO_IGMP,
 240         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 241
 242         .pr_input = igmp_input,
 243         .pr_output = NULL,
 244         .pr_ctlinput = NULL,
 245         .pr_ctloutput = rip_ctloutput,
 246
 247         .pr_init = igmp_init,
 248         .pr_fasttimo = igmp_fasttimo,
 249         .pr_slowtimo = igmp_slowtimo,
 250         .pr_drain = NULL,
 251         .pr_usrreqs = &rip_usrreqs
 252     },
 253     {
 254         .pr_type = SOCK_RAW,
 255         .pr_domain = &inetdomain,
 256         .pr_protocol = IPPROTO_RSVP,
 257         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 258
 259         .pr_input = rsvp_input,
 260         .pr_output = NULL,
 261         .pr_ctlinput = NULL,
 262         .pr_ctloutput = rip_ctloutput,
 263
 264         .pr_usrreqs = &rip_usrreqs
 265     },
 266 #ifdef IPSEC
 267     {
 268         .pr_type = SOCK_RAW,
 269         .pr_domain = &inetdomain,
 270         .pr_protocol = IPPROTO_AH,
 271         .pr_flags = PR_ATOMIC|PR_ADDR,
 272
 273         .pr_input = ah4_input,
 274         .pr_output = NULL,
 275         .pr_ctlinput = NULL,
 276         .pr_ctloutput = NULL,
 277
 278         .pr_ctlport = NULL,
 279         .pr_usrreqs = &nousrreqs
 280     },
 281 #ifdef IPSEC_ESP
 282     {
 283         .pr_type = SOCK_RAW,
 284         .pr_domain = &inetdomain,
 285         .pr_protocol = IPPROTO_ESP,
 286         .pr_flags = PR_ATOMIC|PR_ADDR,
 287
 288         .pr_input = esp4_input,
 289         .pr_output = NULL,
 290         .pr_ctlinput = NULL,
 291         .pr_ctloutput = NULL,
 292
 293         .pr_ctlport = NULL,
 294         .pr_usrreqs = &nousrreqs
 295     },
 296 #endif
 297     {
 298         .pr_type = SOCK_RAW,
 299         .pr_domain = &inetdomain,
 300         .pr_protocol = IPPROTO_IPCOMP,
 301         .pr_flags = PR_ATOMIC|PR_ADDR,
 302
 303         .pr_input = ipcomp4_input,
 304         .pr_output = 0,
 305         .pr_ctlinput = NULL,
 306         .pr_ctloutput = NULL,
 307
 308         .pr_ctlport = NULL,
 309         .pr_usrreqs = &nousrreqs
 310     },
 311 #endif /* IPSEC */
 312 #ifdef FAST_IPSEC
 313     {
 314         .pr_type = SOCK_RAW,
 315         .pr_domain = &inetdomain,
 316         .pr_protocol = IPPROTO_AH,
 317         .pr_flags = PR_ATOMIC|PR_ADDR,
 318
 319         .pr_input = ipsec4_common_input,
 320         .pr_output = NULL,
 321         .pr_ctlinput = NULL,
 322         .pr_ctloutput = NULL,
 323
 324         .pr_ctlport = NULL,
 325         .pr_usrreqs = &nousrreqs
 326     },
 327     {
 328         .pr_type = SOCK_RAW,
 329         .pr_domain = &inetdomain,
 330         .pr_protocol = IPPROTO_ESP,
 331         .pr_flags = PR_ATOMIC|PR_ADDR,
 332
 333         .pr_input = ipsec4_common_input,
 334         .pr_output = NULL,
 335         .pr_ctlinput = NULL,
 336         .pr_ctloutput = NULL,
 337
 338         .pr_ctlport = NULL,
 339         .pr_usrreqs = &nousrreqs
 340     },
 341     {
 342         .pr_type = SOCK_RAW,
 343         .pr_domain = &inetdomain,
 344         .pr_protocol = IPPROTO_IPCOMP,
 345         .pr_flags = PR_ATOMIC|PR_ADDR,
 346
 347         .pr_input = ipsec4_common_input,
 348         .pr_output = NULL,
 349         .pr_ctlinput = NULL,
 350         .pr_ctloutput = NULL,
 351
 352         .pr_ctlport = NULL,
 353         .pr_usrreqs = &nousrreqs
 354     },
 355 #endif /* FAST_IPSEC */
 356     {
 357         .pr_type = SOCK_RAW,
 358         .pr_domain = &inetdomain,
 359         .pr_protocol = IPPROTO_IPV4,
 360         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 361         .pr_input = encap4_input,
 362         .pr_output = NULL,
 363         .pr_ctlinput = NULL,
 364         .pr_ctloutput = rip_ctloutput,
 365
 366         .pr_ctlport = NULL,
 367         .pr_init = encap_init,
 368         .pr_usrreqs = &rip_usrreqs
 369     },
 370     {
 371         .pr_type = SOCK_RAW,
 372         .pr_domain = &inetdomain,
 373         .pr_protocol = IPPROTO_MOBILE,
 374         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 375
 376         .pr_input = encap4_input,
 377         .pr_output = NULL,
 378         .pr_ctlinput = NULL,
 379         .pr_ctloutput = rip_ctloutput,
 380
 381         .pr_ctlport = NULL,
 382         .pr_init = encap_init,
 383         .pr_usrreqs = &rip_usrreqs
 384     },
 385     {
 386         .pr_type = SOCK_RAW,
 387         .pr_domain = &inetdomain,
 388         .pr_protocol = IPPROTO_GRE,
 389         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 390
 391         .pr_input = encap4_input,
 392         .pr_output = NULL,
 393         .pr_ctlinput = NULL,
 394         .pr_ctloutput = rip_ctloutput,
 395
 396         .pr_ctlport = NULL,
 397         .pr_init = encap_init,
 398         .pr_usrreqs = &rip_usrreqs
 399     },
 400 #ifdef INET6
 401     {
 402         .pr_type = SOCK_RAW,
 403         .pr_domain = &inetdomain,
 404         .pr_protocol = IPPROTO_IPV6,
 405         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 406
 407         .pr_input = encap4_input,
 408         .pr_output = NULL,
 409         .pr_ctlinput = NULL,
 410         .pr_ctloutput = rip_ctloutput,
 411
 412         .pr_ctlport = NULL,
 413         .pr_init = encap_init,
 414         .pr_usrreqs = &rip_usrreqs
 415     },
 416 #endif
 417 #ifdef IPDIVERT
 418     {
 419         .pr_type = SOCK_RAW,
 420         .pr_domain = &inetdomain,
 421         .pr_protocol = IPPROTO_DIVERT,
 422         .pr_flags = PR_ATOMIC|PR_ADDR,
 423
 424         .pr_input = div_input,
 425         .pr_output = NULL,
 426         .pr_ctlinput = NULL,
 427         .pr_ctloutput = ip_ctloutput,
 428
 429         .pr_ctlport = NULL,
 430         .pr_init = div_init,
 431         .pr_usrreqs = &div_usrreqs
 432     },
 433 #endif
 434 #ifdef PIM
 435     {
 436         .pr_type = SOCK_RAW,
 437         .pr_domain = &inetdomain,
 438         .pr_protocol = IPPROTO_PIM,
 439         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 440
 441         .pr_input = pim_input,
 442         .pr_output = NULL,
 443         .pr_ctlinput = NULL,
 444         .pr_ctloutput = rip_ctloutput,
 445
 446         .pr_ctlport = NULL,
 447         .pr_usrreqs = &rip_usrreqs
 448     },
 449 #endif
 450 #ifdef NPFSYNC
 451     {
 452         .pr_type = SOCK_RAW,
 453         .pr_domain = &inetdomain,
 454         .pr_protocol = IPPROTO_PFSYNC,
 455         .pr_flags = PR_ATOMIC|PR_ADDR,
 456
 457         .pr_input = pfsync_input,
 458         .pr_output = NULL,
 459         .pr_ctlinput = NULL,
 460         .pr_ctloutput = rip_ctloutput,
 461
 462         .pr_ctlport = NULL,
 463         .pr_usrreqs = &rip_usrreqs
 464     },
 465 #endif  /* NPFSYNC */
 466     {
 467         /* raw wildcard */
 468         .pr_type = SOCK_RAW,
 469         .pr_domain = &inetdomain,
 470         .pr_protocol = 0,
 471         .pr_flags = PR_ATOMIC|PR_ADDR,
 472
 473         .pr_input = rip_input,
 474         .pr_output = NULL,
 475         .pr_ctlinput = NULL,
 476         .pr_ctloutput = rip_ctloutput,
 477
 478         .pr_init = rip_init,
 479         .pr_ctlport = NULL,
 480         .pr_usrreqs = &rip_usrreqs
 481     },
 482 #ifdef CARP
 483     {
 484         .pr_type = SOCK_RAW,
 485         .pr_domain = &inetdomain,
 486         .pr_protocol = IPPROTO_CARP,
 487         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE,
 488
 489         .pr_input = carp_proto_input,
 490         .pr_output = rip_output,
 491         .pr_ctlinput = carp_proto_ctlinput,
 492         .pr_ctloutput = rip_ctloutput,
 493
 494         .pr_ctlport = cpu0_ctlport,
 495         .pr_usrreqs = &rip_usrreqs
 496     },
 497 #endif
 498 };
 499
 500 struct domain inetdomain = {
 501         AF_INET, "internet", NULL, NULL, NULL,
 502         inetsw, &inetsw[NELEM(inetsw)],
 503         SLIST_ENTRY_INITIALIZER,
 504         in_inithead, 32, sizeof(struct sockaddr_in),
 505 };
 506
 507 DOMAIN_SET(inet);
 508
 509 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 510         "Internet Family");
 511
 512 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 513 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 514 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 515 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 516 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 517 #ifdef FAST_IPSEC
 518 /* XXX no protocol # to use, pick something "reserved" */
 519 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 520 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 521 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 522 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 523 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 524 #else
 525 #ifdef IPSEC
 526 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 527 #endif /* IPSEC */
 528 #endif /* !FAST_IPSEC */
 529 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 530 #ifdef IPDIVERT
 531 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 532 #endif
 533 #ifdef PIM
 534 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 535 #endif
 536 #ifdef CARP
 537 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,    CTLFLAG_RW, 0,  "CARP");
 538 #endif