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_carp.h"
  38
  39 #include <sys/param.h>
  40 #include <sys/kernel.h>
  41 #include <sys/socket.h>
  42 #include <sys/domain.h>
  43 #include <sys/protosw.h>
  44 #include <sys/queue.h>
  45 #include <sys/sysctl.h>
  46
  47 #include <net/if.h>
  48 #include <net/route.h>
  49
  50 #include <netinet/in.h>
  51 #include <netinet/in_systm.h>
  52 #include <netinet/in_pcb.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 #include <net/netisr.h>         /* for cpu0_soport */
  88
  89 #ifdef CARP
  90 #include <netinet/ip_carp.h>
  91 #endif
  92
  93 extern  struct domain inetdomain;
  94 static  struct pr_usrreqs nousrreqs;
  95
  96 struct protosw inetsw[] = {
  97     {
  98         .pr_type = 0,
  99         .pr_domain = &inetdomain,
 100         .pr_protocol = 0,
 101         .pr_flags = 0,
 102
 103         .pr_ctlport = NULL,
 104
 105         .pr_init = ip_init,
 106         .pr_fasttimo = NULL,
 107         .pr_slowtimo = ip_slowtimo,
 108         .pr_drain = ip_drain,
 109         .pr_usrreqs = &nousrreqs
 110     },
 111     {
 112         .pr_type = SOCK_DGRAM,
 113         .pr_domain = &inetdomain,
 114         .pr_protocol = IPPROTO_UDP,
 115         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE|
 116             PR_ASYNC_SEND|PR_ASEND_HOLDTD|PR_ACONN_HOLDTD,
 117
 118         .pr_initport = udp_initport,
 119         .pr_input = udp_input,
 120         .pr_output = NULL,
 121         .pr_ctlinput = udp_ctlinput,
 122         .pr_ctloutput = udp_ctloutput,
 123
 124         .pr_ctlport = udp_ctlport,
 125         .pr_init = udp_init,
 126         .pr_usrreqs = &udp_usrreqs
 127     },
 128     {
 129         .pr_type = SOCK_STREAM,
 130         .pr_domain = &inetdomain,
 131         .pr_protocol = IPPROTO_TCP,
 132         .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_MPSAFE|
 133             PR_ASYNC_SEND|PR_ASYNC_RCVD|PR_ACONN_HOLDTD,
 134
 135         .pr_initport = tcp_initport,
 136         .pr_input = tcp_input,
 137         .pr_output = NULL,
 138         .pr_ctlinput = tcp_ctlinput,
 139         .pr_ctloutput = tcp_ctloutput,
 140
 141         .pr_ctlport = tcp_ctlport,
 142         .pr_init = tcp_init,
 143         .pr_fasttimo = NULL,
 144         .pr_slowtimo = NULL,
 145         .pr_drain = tcp_drain,
 146         .pr_usrreqs = &tcp_usrreqs
 147     },
 148     {
 149         .pr_type = SOCK_RAW,
 150         .pr_domain = &inetdomain,
 151         .pr_protocol = IPPROTO_RAW,
 152         .pr_flags = PR_ATOMIC|PR_ADDR,
 153
 154         .pr_input = rip_input,
 155         .pr_output = NULL,
 156         .pr_ctlinput = rip_ctlinput,
 157         .pr_ctloutput = rip_ctloutput,
 158
 159         .pr_ctlport = cpu0_ctlport,
 160         .pr_usrreqs = &rip_usrreqs
 161     },
 162     {
 163         .pr_type = SOCK_RAW,
 164         .pr_domain = &inetdomain,
 165         .pr_protocol = IPPROTO_ICMP,
 166         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE,
 167
 168         .pr_input = icmp_input,
 169         .pr_output = NULL,
 170         .pr_ctlinput = NULL,
 171         .pr_ctloutput = rip_ctloutput,
 172
 173         .pr_usrreqs = &rip_usrreqs
 174     },
 175     {
 176         .pr_type = SOCK_RAW,
 177         .pr_domain = &inetdomain,
 178         .pr_protocol = IPPROTO_IGMP,
 179         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE,
 180
 181         .pr_input = igmp_input,
 182         .pr_output = NULL,
 183         .pr_ctlinput = NULL,
 184         .pr_ctloutput = rip_ctloutput,
 185
 186         .pr_init = igmp_init,
 187         .pr_fasttimo = igmp_fasttimo,
 188         .pr_slowtimo = igmp_slowtimo,
 189         .pr_drain = NULL,
 190         .pr_usrreqs = &rip_usrreqs
 191     },
 192     {
 193         .pr_type = SOCK_RAW,
 194         .pr_domain = &inetdomain,
 195         .pr_protocol = IPPROTO_RSVP,
 196         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 197
 198         .pr_input = rsvp_input,
 199         .pr_output = NULL,
 200         .pr_ctlinput = NULL,
 201         .pr_ctloutput = rip_ctloutput,
 202
 203         .pr_usrreqs = &rip_usrreqs
 204     },
 205 #ifdef IPSEC
 206     {
 207         .pr_type = SOCK_RAW,
 208         .pr_domain = &inetdomain,
 209         .pr_protocol = IPPROTO_AH,
 210         .pr_flags = PR_ATOMIC|PR_ADDR,
 211
 212         .pr_input = ah4_input,
 213         .pr_output = NULL,
 214         .pr_ctlinput = NULL,
 215         .pr_ctloutput = NULL,
 216
 217         .pr_ctlport = NULL,
 218         .pr_usrreqs = &nousrreqs
 219     },
 220 #ifdef IPSEC_ESP
 221     {
 222         .pr_type = SOCK_RAW,
 223         .pr_domain = &inetdomain,
 224         .pr_protocol = IPPROTO_ESP,
 225         .pr_flags = PR_ATOMIC|PR_ADDR,
 226
 227         .pr_input = esp4_input,
 228         .pr_output = NULL,
 229         .pr_ctlinput = NULL,
 230         .pr_ctloutput = NULL,
 231
 232         .pr_ctlport = NULL,
 233         .pr_usrreqs = &nousrreqs
 234     },
 235 #endif
 236     {
 237         .pr_type = SOCK_RAW,
 238         .pr_domain = &inetdomain,
 239         .pr_protocol = IPPROTO_IPCOMP,
 240         .pr_flags = PR_ATOMIC|PR_ADDR,
 241
 242         .pr_input = ipcomp4_input,
 243         .pr_output = 0,
 244         .pr_ctlinput = NULL,
 245         .pr_ctloutput = NULL,
 246
 247         .pr_ctlport = NULL,
 248         .pr_usrreqs = &nousrreqs
 249     },
 250 #endif /* IPSEC */
 251 #ifdef FAST_IPSEC
 252     {
 253         .pr_type = SOCK_RAW,
 254         .pr_domain = &inetdomain,
 255         .pr_protocol = IPPROTO_AH,
 256         .pr_flags = PR_ATOMIC|PR_ADDR,
 257
 258         .pr_input = ipsec4_common_input,
 259         .pr_output = NULL,
 260         .pr_ctlinput = NULL,
 261         .pr_ctloutput = NULL,
 262
 263         .pr_ctlport = NULL,
 264         .pr_usrreqs = &nousrreqs
 265     },
 266     {
 267         .pr_type = SOCK_RAW,
 268         .pr_domain = &inetdomain,
 269         .pr_protocol = IPPROTO_ESP,
 270         .pr_flags = PR_ATOMIC|PR_ADDR,
 271
 272         .pr_input = ipsec4_common_input,
 273         .pr_output = NULL,
 274         .pr_ctlinput = NULL,
 275         .pr_ctloutput = NULL,
 276
 277         .pr_ctlport = NULL,
 278         .pr_usrreqs = &nousrreqs
 279     },
 280     {
 281         .pr_type = SOCK_RAW,
 282         .pr_domain = &inetdomain,
 283         .pr_protocol = IPPROTO_IPCOMP,
 284         .pr_flags = PR_ATOMIC|PR_ADDR,
 285
 286         .pr_input = ipsec4_common_input,
 287         .pr_output = NULL,
 288         .pr_ctlinput = NULL,
 289         .pr_ctloutput = NULL,
 290
 291         .pr_ctlport = NULL,
 292         .pr_usrreqs = &nousrreqs
 293     },
 294 #endif /* FAST_IPSEC */
 295     {
 296         .pr_type = SOCK_RAW,
 297         .pr_domain = &inetdomain,
 298         .pr_protocol = IPPROTO_IPV4,
 299         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 300         .pr_input = encap4_input,
 301         .pr_output = NULL,
 302         .pr_ctlinput = NULL,
 303         .pr_ctloutput = rip_ctloutput,
 304
 305         .pr_ctlport = NULL,
 306         .pr_init = encap_init,
 307         .pr_usrreqs = &rip_usrreqs
 308     },
 309     {
 310         .pr_type = SOCK_RAW,
 311         .pr_domain = &inetdomain,
 312         .pr_protocol = IPPROTO_MOBILE,
 313         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 314
 315         .pr_input = encap4_input,
 316         .pr_output = NULL,
 317         .pr_ctlinput = NULL,
 318         .pr_ctloutput = rip_ctloutput,
 319
 320         .pr_ctlport = NULL,
 321         .pr_init = encap_init,
 322         .pr_usrreqs = &rip_usrreqs
 323     },
 324     {
 325         .pr_type = SOCK_RAW,
 326         .pr_domain = &inetdomain,
 327         .pr_protocol = IPPROTO_GRE,
 328         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 329
 330         .pr_input = encap4_input,
 331         .pr_output = NULL,
 332         .pr_ctlinput = NULL,
 333         .pr_ctloutput = rip_ctloutput,
 334
 335         .pr_ctlport = NULL,
 336         .pr_init = encap_init,
 337         .pr_usrreqs = &rip_usrreqs
 338     },
 339 #ifdef INET6
 340     {
 341         .pr_type = SOCK_RAW,
 342         .pr_domain = &inetdomain,
 343         .pr_protocol = IPPROTO_IPV6,
 344         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 345
 346         .pr_input = encap4_input,
 347         .pr_output = NULL,
 348         .pr_ctlinput = NULL,
 349         .pr_ctloutput = rip_ctloutput,
 350
 351         .pr_ctlport = NULL,
 352         .pr_init = encap_init,
 353         .pr_usrreqs = &rip_usrreqs
 354     },
 355 #endif
 356 #ifdef IPDIVERT
 357     {
 358         .pr_type = SOCK_RAW,
 359         .pr_domain = &inetdomain,
 360         .pr_protocol = IPPROTO_DIVERT,
 361         .pr_flags = PR_ATOMIC|PR_ADDR,
 362
 363         .pr_input = div_input,
 364         .pr_output = NULL,
 365         .pr_ctlinput = NULL,
 366         .pr_ctloutput = ip_ctloutput,
 367
 368         .pr_ctlport = NULL,
 369         .pr_init = div_init,
 370         .pr_usrreqs = &div_usrreqs
 371     },
 372 #endif
 373 #ifdef PIM
 374     {
 375         .pr_type = SOCK_RAW,
 376         .pr_domain = &inetdomain,
 377         .pr_protocol = IPPROTO_PIM,
 378         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 379
 380         .pr_input = pim_input,
 381         .pr_output = NULL,
 382         .pr_ctlinput = NULL,
 383         .pr_ctloutput = rip_ctloutput,
 384
 385         .pr_ctlport = NULL,
 386         .pr_usrreqs = &rip_usrreqs
 387     },
 388 #endif
 389 #ifdef NPFSYNC
 390     {
 391         .pr_type = SOCK_RAW,
 392         .pr_domain = &inetdomain,
 393         .pr_protocol = IPPROTO_PFSYNC,
 394         .pr_flags = PR_ATOMIC|PR_ADDR,
 395
 396         .pr_input = pfsync_input,
 397         .pr_output = NULL,
 398         .pr_ctlinput = NULL,
 399         .pr_ctloutput = rip_ctloutput,
 400
 401         .pr_ctlport = NULL,
 402         .pr_usrreqs = &rip_usrreqs
 403     },
 404 #endif  /* NPFSYNC */
 405     {
 406         /* raw wildcard */
 407         .pr_type = SOCK_RAW,
 408         .pr_domain = &inetdomain,
 409         .pr_protocol = 0,
 410         .pr_flags = PR_ATOMIC|PR_ADDR,
 411
 412         .pr_input = rip_input,
 413         .pr_output = NULL,
 414         .pr_ctlinput = NULL,
 415         .pr_ctloutput = rip_ctloutput,
 416
 417         .pr_init = rip_init,
 418         .pr_ctlport = NULL,
 419         .pr_usrreqs = &rip_usrreqs
 420     },
 421 #ifdef CARP
 422     {
 423         .pr_type = SOCK_RAW,
 424         .pr_domain = &inetdomain,
 425         .pr_protocol = IPPROTO_CARP,
 426         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE,
 427
 428         .pr_input = carp_proto_input,
 429         .pr_output = rip_output,
 430         .pr_ctlinput = carp_proto_ctlinput,
 431         .pr_ctloutput = rip_ctloutput,
 432
 433         .pr_ctlport = cpu0_ctlport,
 434         .pr_usrreqs = &rip_usrreqs
 435     },
 436 #endif
 437 };
 438
 439 static void
 440 inetdomain_init(void)
 441 {
 442         in_pcbglobalinit();
 443 }
 444
 445 struct domain inetdomain = {
 446         AF_INET, "internet", inetdomain_init, NULL, NULL,
 447         inetsw, &inetsw[NELEM(inetsw)],
 448         SLIST_ENTRY_INITIALIZER,
 449         in_inithead, 32, sizeof(struct sockaddr_in),
 450 };
 451
 452 DOMAIN_SET(inet);
 453
 454 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 455         "Internet Family");
 456
 457 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 458 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 459 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 460 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 461 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 462 #ifdef FAST_IPSEC
 463 /* XXX no protocol # to use, pick something "reserved" */
 464 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 465 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 466 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 467 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 468 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 469 #else
 470 #ifdef IPSEC
 471 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 472 #endif /* IPSEC */
 473 #endif /* !FAST_IPSEC */
 474 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 475 #ifdef IPDIVERT
 476 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 477 #endif
 478 #ifdef PIM
 479 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 480 #endif
 481 #ifdef CARP
 482 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,    CTLFLAG_RW, 0,  "CARP");
 483 #endif