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