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_ctloutmsg = tcp_ctloutmsg,
 140         .pr_ctloutput = tcp_ctloutput,
 141
 142         .pr_ctlport = tcp_ctlport,
 143         .pr_init = tcp_init,
 144         .pr_fasttimo = NULL,
 145         .pr_slowtimo = NULL,
 146         .pr_drain = tcp_drain,
 147         .pr_usrreqs = &tcp_usrreqs
 148     },
 149     {
 150         .pr_type = SOCK_RAW,
 151         .pr_domain = &inetdomain,
 152         .pr_protocol = IPPROTO_RAW,
 153         .pr_flags = PR_ATOMIC|PR_ADDR,
 154
 155         .pr_input = rip_input,
 156         .pr_output = NULL,
 157         .pr_ctlinput = rip_ctlinput,
 158         .pr_ctloutput = rip_ctloutput,
 159
 160         .pr_ctlport = cpu0_ctlport,
 161         .pr_usrreqs = &rip_usrreqs
 162     },
 163     {
 164         .pr_type = SOCK_RAW,
 165         .pr_domain = &inetdomain,
 166         .pr_protocol = IPPROTO_ICMP,
 167         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE,
 168
 169         .pr_input = icmp_input,
 170         .pr_output = NULL,
 171         .pr_ctlinput = NULL,
 172         .pr_ctloutput = rip_ctloutput,
 173
 174         .pr_usrreqs = &rip_usrreqs
 175     },
 176     {
 177         .pr_type = SOCK_RAW,
 178         .pr_domain = &inetdomain,
 179         .pr_protocol = IPPROTO_IGMP,
 180         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE,
 181
 182         .pr_input = igmp_input,
 183         .pr_output = NULL,
 184         .pr_ctlinput = NULL,
 185         .pr_ctloutput = rip_ctloutput,
 186
 187         .pr_init = igmp_init,
 188         .pr_fasttimo = igmp_fasttimo,
 189         .pr_slowtimo = igmp_slowtimo,
 190         .pr_drain = NULL,
 191         .pr_usrreqs = &rip_usrreqs
 192     },
 193     {
 194         .pr_type = SOCK_RAW,
 195         .pr_domain = &inetdomain,
 196         .pr_protocol = IPPROTO_RSVP,
 197         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 198
 199         .pr_input = rsvp_input,
 200         .pr_output = NULL,
 201         .pr_ctlinput = NULL,
 202         .pr_ctloutput = rip_ctloutput,
 203
 204         .pr_usrreqs = &rip_usrreqs
 205     },
 206 #ifdef IPSEC
 207     {
 208         .pr_type = SOCK_RAW,
 209         .pr_domain = &inetdomain,
 210         .pr_protocol = IPPROTO_AH,
 211         .pr_flags = PR_ATOMIC|PR_ADDR,
 212
 213         .pr_input = ah4_input,
 214         .pr_output = NULL,
 215         .pr_ctlinput = NULL,
 216         .pr_ctloutput = NULL,
 217
 218         .pr_ctlport = NULL,
 219         .pr_usrreqs = &nousrreqs
 220     },
 221 #ifdef IPSEC_ESP
 222     {
 223         .pr_type = SOCK_RAW,
 224         .pr_domain = &inetdomain,
 225         .pr_protocol = IPPROTO_ESP,
 226         .pr_flags = PR_ATOMIC|PR_ADDR,
 227
 228         .pr_input = esp4_input,
 229         .pr_output = NULL,
 230         .pr_ctlinput = NULL,
 231         .pr_ctloutput = NULL,
 232
 233         .pr_ctlport = NULL,
 234         .pr_usrreqs = &nousrreqs
 235     },
 236 #endif
 237     {
 238         .pr_type = SOCK_RAW,
 239         .pr_domain = &inetdomain,
 240         .pr_protocol = IPPROTO_IPCOMP,
 241         .pr_flags = PR_ATOMIC|PR_ADDR,
 242
 243         .pr_input = ipcomp4_input,
 244         .pr_output = 0,
 245         .pr_ctlinput = NULL,
 246         .pr_ctloutput = NULL,
 247
 248         .pr_ctlport = NULL,
 249         .pr_usrreqs = &nousrreqs
 250     },
 251 #endif /* IPSEC */
 252 #ifdef FAST_IPSEC
 253     {
 254         .pr_type = SOCK_RAW,
 255         .pr_domain = &inetdomain,
 256         .pr_protocol = IPPROTO_AH,
 257         .pr_flags = PR_ATOMIC|PR_ADDR,
 258
 259         .pr_input = ipsec4_common_input,
 260         .pr_output = NULL,
 261         .pr_ctlinput = NULL,
 262         .pr_ctloutput = NULL,
 263
 264         .pr_ctlport = NULL,
 265         .pr_usrreqs = &nousrreqs
 266     },
 267     {
 268         .pr_type = SOCK_RAW,
 269         .pr_domain = &inetdomain,
 270         .pr_protocol = IPPROTO_ESP,
 271         .pr_flags = PR_ATOMIC|PR_ADDR,
 272
 273         .pr_input = ipsec4_common_input,
 274         .pr_output = NULL,
 275         .pr_ctlinput = NULL,
 276         .pr_ctloutput = NULL,
 277
 278         .pr_ctlport = NULL,
 279         .pr_usrreqs = &nousrreqs
 280     },
 281     {
 282         .pr_type = SOCK_RAW,
 283         .pr_domain = &inetdomain,
 284         .pr_protocol = IPPROTO_IPCOMP,
 285         .pr_flags = PR_ATOMIC|PR_ADDR,
 286
 287         .pr_input = ipsec4_common_input,
 288         .pr_output = NULL,
 289         .pr_ctlinput = NULL,
 290         .pr_ctloutput = NULL,
 291
 292         .pr_ctlport = NULL,
 293         .pr_usrreqs = &nousrreqs
 294     },
 295 #endif /* FAST_IPSEC */
 296     {
 297         .pr_type = SOCK_RAW,
 298         .pr_domain = &inetdomain,
 299         .pr_protocol = IPPROTO_IPV4,
 300         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 301         .pr_input = encap4_input,
 302         .pr_output = NULL,
 303         .pr_ctlinput = NULL,
 304         .pr_ctloutput = rip_ctloutput,
 305
 306         .pr_ctlport = NULL,
 307         .pr_init = encap_init,
 308         .pr_usrreqs = &rip_usrreqs
 309     },
 310     {
 311         .pr_type = SOCK_RAW,
 312         .pr_domain = &inetdomain,
 313         .pr_protocol = IPPROTO_MOBILE,
 314         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 315
 316         .pr_input = encap4_input,
 317         .pr_output = NULL,
 318         .pr_ctlinput = NULL,
 319         .pr_ctloutput = rip_ctloutput,
 320
 321         .pr_ctlport = NULL,
 322         .pr_init = encap_init,
 323         .pr_usrreqs = &rip_usrreqs
 324     },
 325     {
 326         .pr_type = SOCK_RAW,
 327         .pr_domain = &inetdomain,
 328         .pr_protocol = IPPROTO_GRE,
 329         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 330
 331         .pr_input = encap4_input,
 332         .pr_output = NULL,
 333         .pr_ctlinput = NULL,
 334         .pr_ctloutput = rip_ctloutput,
 335
 336         .pr_ctlport = NULL,
 337         .pr_init = encap_init,
 338         .pr_usrreqs = &rip_usrreqs
 339     },
 340 #ifdef INET6
 341     {
 342         .pr_type = SOCK_RAW,
 343         .pr_domain = &inetdomain,
 344         .pr_protocol = IPPROTO_IPV6,
 345         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 346
 347         .pr_input = encap4_input,
 348         .pr_output = NULL,
 349         .pr_ctlinput = NULL,
 350         .pr_ctloutput = rip_ctloutput,
 351
 352         .pr_ctlport = NULL,
 353         .pr_init = encap_init,
 354         .pr_usrreqs = &rip_usrreqs
 355     },
 356 #endif
 357 #ifdef IPDIVERT
 358     {
 359         .pr_type = SOCK_RAW,
 360         .pr_domain = &inetdomain,
 361         .pr_protocol = IPPROTO_DIVERT,
 362         .pr_flags = PR_ATOMIC|PR_ADDR,
 363
 364         .pr_input = div_input,
 365         .pr_output = NULL,
 366         .pr_ctlinput = NULL,
 367         .pr_ctloutput = ip_ctloutput,
 368
 369         .pr_ctlport = NULL,
 370         .pr_init = div_init,
 371         .pr_usrreqs = &div_usrreqs
 372     },
 373 #endif
 374 #ifdef PIM
 375     {
 376         .pr_type = SOCK_RAW,
 377         .pr_domain = &inetdomain,
 378         .pr_protocol = IPPROTO_PIM,
 379         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 380
 381         .pr_input = pim_input,
 382         .pr_output = NULL,
 383         .pr_ctlinput = NULL,
 384         .pr_ctloutput = rip_ctloutput,
 385
 386         .pr_ctlport = NULL,
 387         .pr_usrreqs = &rip_usrreqs
 388     },
 389 #endif
 390 #ifdef NPFSYNC
 391     {
 392         .pr_type = SOCK_RAW,
 393         .pr_domain = &inetdomain,
 394         .pr_protocol = IPPROTO_PFSYNC,
 395         .pr_flags = PR_ATOMIC|PR_ADDR,
 396
 397         .pr_input = pfsync_input,
 398         .pr_output = NULL,
 399         .pr_ctlinput = NULL,
 400         .pr_ctloutput = rip_ctloutput,
 401
 402         .pr_ctlport = NULL,
 403         .pr_usrreqs = &rip_usrreqs
 404     },
 405 #endif  /* NPFSYNC */
 406     {
 407         /* raw wildcard */
 408         .pr_type = SOCK_RAW,
 409         .pr_domain = &inetdomain,
 410         .pr_protocol = 0,
 411         .pr_flags = PR_ATOMIC|PR_ADDR,
 412
 413         .pr_input = rip_input,
 414         .pr_output = NULL,
 415         .pr_ctlinput = NULL,
 416         .pr_ctloutput = rip_ctloutput,
 417
 418         .pr_init = rip_init,
 419         .pr_ctlport = NULL,
 420         .pr_usrreqs = &rip_usrreqs
 421     },
 422 #ifdef CARP
 423     {
 424         .pr_type = SOCK_RAW,
 425         .pr_domain = &inetdomain,
 426         .pr_protocol = IPPROTO_CARP,
 427         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE,
 428
 429         .pr_input = carp_proto_input,
 430         .pr_output = rip_output,
 431         .pr_ctlinput = carp_proto_ctlinput,
 432         .pr_ctloutput = rip_ctloutput,
 433
 434         .pr_ctlport = cpu0_ctlport,
 435         .pr_usrreqs = &rip_usrreqs
 436     },
 437 #endif
 438 };
 439
 440 static void
 441 inetdomain_init(void)
 442 {
 443         in_pcbglobalinit();
 444 }
 445
 446 struct domain inetdomain = {
 447         .dom_family             = AF_INET,
 448         .dom_name               = "internet",
 449         .dom_init               = inetdomain_init,
 450         .dom_externalize        = NULL,
 451         .dom_dispose            = NULL,
 452         .dom_protosw            = inetsw,
 453         .dom_protoswNPROTOSW    = &inetsw[NELEM(inetsw)],
 454         .dom_next               = SLIST_ENTRY_INITIALIZER,
 455         .dom_rtattach           = in_inithead,
 456         .dom_rtoffset           = 32,
 457         .dom_maxrtkey           = sizeof(struct sockaddr_in),
 458         .dom_ifattach           = NULL,
 459         .dom_ifdetach           = NULL
 460 };
 461
 462 DOMAIN_SET(inet);
 463
 464 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 465         "Internet Family");
 466
 467 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 468 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 469 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 470 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 471 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 472 #ifdef FAST_IPSEC
 473 /* XXX no protocol # to use, pick something "reserved" */
 474 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 475 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 476 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 477 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 478 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 479 #else
 480 #ifdef IPSEC
 481 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 482 #endif /* IPSEC */
 483 #endif /* !FAST_IPSEC */
 484 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 485 #ifdef IPDIVERT
 486 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 487 #endif
 488 #ifdef PIM
 489 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 490 #endif
 491 #ifdef CARP
 492 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,    CTLFLAG_RW, 0,  "CARP");
 493 #endif