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  * 4. 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  * $FreeBSD$
  31  */
  32
  33 #include "opt_ipx.h"
  34 #include "opt_mrouting.h"
  35 #include "opt_ipsec.h"
  36 #include "opt_inet6.h"
  37 #include "opt_pf.h"
  38 #include "opt_carp.h"
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.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
  68 /*
  69  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  70  */
  71
  72 static struct pr_usrreqs nousrreqs;
  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 <netipsec/ipsec.h>
  85 #endif /* FAST_IPSEC */
  86
  87 #ifdef IPXIP
  88 #include <netipx/ipx_ip.h>
  89 #endif
  90
  91 #ifdef DEV_PFSYNC
  92 #include <net/pfvar.h>
  93 #include <net/if_pfsync.h>
  94 #endif
  95
  96 #ifdef DEV_CARP
  97 #include <netinet/ip_carp.h>
  98 #endif
  99
 100 extern  struct domain inetdomain;
 101
 102 /* Spacer for loadable protocols. */
 103 #define IPPROTOSPACER                           \
 104 {                                               \
 105         .pr_domain =            &inetdomain,    \
 106         .pr_protocol =          PROTO_SPACER,   \
 107         .pr_usrreqs =           &nousrreqs      \
 108 }
 109
 110 struct protosw inetsw[] = {
 111 {
 112         .pr_type =              0,
 113         .pr_domain =            &inetdomain,
 114         .pr_protocol =          IPPROTO_IP,
 115         .pr_init =              ip_init,
 116         .pr_slowtimo =          ip_slowtimo,
 117         .pr_drain =             ip_drain,
 118         .pr_usrreqs =           &nousrreqs
 119 },
 120 {
 121         .pr_type =              SOCK_DGRAM,
 122         .pr_domain =            &inetdomain,
 123         .pr_protocol =          IPPROTO_UDP,
 124         .pr_flags =             PR_ATOMIC|PR_ADDR,
 125         .pr_input =             udp_input,
 126         .pr_ctlinput =          udp_ctlinput,
 127         .pr_ctloutput =         ip_ctloutput,
 128         .pr_init =              udp_init,
 129         .pr_usrreqs =           &udp_usrreqs
 130 },
 131 {
 132         .pr_type =              SOCK_STREAM,
 133         .pr_domain =            &inetdomain,
 134         .pr_protocol =          IPPROTO_TCP,
 135         .pr_flags =             PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 136         .pr_input =             tcp_input,
 137         .pr_ctlinput =          tcp_ctlinput,
 138         .pr_ctloutput =         tcp_ctloutput,
 139         .pr_init =              tcp_init,
 140         .pr_slowtimo =          tcp_slowtimo,
 141         .pr_drain =             tcp_drain,
 142         .pr_usrreqs =           &tcp_usrreqs
 143 },
 144 {
 145         .pr_type =              SOCK_RAW,
 146         .pr_domain =            &inetdomain,
 147         .pr_protocol =          IPPROTO_RAW,
 148         .pr_flags =             PR_ATOMIC|PR_ADDR,
 149         .pr_input =             rip_input,
 150         .pr_ctlinput =          rip_ctlinput,
 151         .pr_ctloutput =         rip_ctloutput,
 152         .pr_usrreqs =           &rip_usrreqs
 153 },
 154 {
 155         .pr_type =              SOCK_RAW,
 156         .pr_domain =            &inetdomain,
 157         .pr_protocol =          IPPROTO_ICMP,
 158         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 159         .pr_input =             icmp_input,
 160         .pr_ctloutput =         rip_ctloutput,
 161         .pr_usrreqs =           &rip_usrreqs
 162 },
 163 {
 164         .pr_type =              SOCK_RAW,
 165         .pr_domain =            &inetdomain,
 166         .pr_protocol =          IPPROTO_IGMP,
 167         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 168         .pr_input =             igmp_input,
 169         .pr_ctloutput =         rip_ctloutput,
 170         .pr_init =              igmp_init,
 171         .pr_fasttimo =          igmp_fasttimo,
 172         .pr_slowtimo =          igmp_slowtimo,
 173         .pr_usrreqs =           &rip_usrreqs
 174 },
 175 {
 176         .pr_type =              SOCK_RAW,
 177         .pr_domain =            &inetdomain,
 178         .pr_protocol =          IPPROTO_RSVP,
 179         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 180         .pr_input =             rsvp_input,
 181         .pr_ctloutput =         rip_ctloutput,
 182         .pr_usrreqs =           &rip_usrreqs
 183 },
 184 #ifdef IPSEC
 185 {
 186         .pr_type =              SOCK_RAW,
 187         .pr_domain =            &inetdomain,
 188         .pr_protocol =          IPPROTO_AH,
 189         .pr_flags =             PR_ATOMIC|PR_ADDR,
 190         .pr_input =             ah4_input,
 191         .pr_usrreqs =           &nousrreqs
 192 },
 193 #ifdef IPSEC_ESP
 194 {
 195         .pr_type =              SOCK_RAW,
 196         .pr_domain =            &inetdomain,
 197         .pr_protocol =          IPPROTO_ESP,
 198         .pr_flags =             PR_ATOMIC|PR_ADDR,
 199         .pr_input =             esp4_input,
 200         .pr_usrreqs =           &nousrreqs
 201 },
 202 #endif
 203 {
 204         .pr_type =              SOCK_RAW,
 205         .pr_domain =            &inetdomain,
 206         .pr_protocol =          IPPROTO_IPCOMP,
 207         .pr_flags =             PR_ATOMIC|PR_ADDR,
 208         .pr_input =             ipcomp4_input,
 209         .pr_usrreqs =           &nousrreqs
 210 },
 211 #endif /* IPSEC */
 212 #ifdef FAST_IPSEC
 213 {
 214         .pr_type =              SOCK_RAW,
 215         .pr_domain =            &inetdomain,
 216         .pr_protocol =          IPPROTO_AH,
 217         .pr_flags =             PR_ATOMIC|PR_ADDR,
 218         .pr_input =             ah4_input,
 219         .pr_ctlinput =          ah4_ctlinput,
 220         .pr_usrreqs =           &nousrreqs
 221 },
 222 {
 223         .pr_type =              SOCK_RAW,
 224         .pr_domain =            &inetdomain,
 225         .pr_protocol =          IPPROTO_ESP,
 226         .pr_flags =             PR_ATOMIC|PR_ADDR,
 227         .pr_input =             esp4_input,
 228         .pr_ctlinput =          esp4_ctlinput,
 229         .pr_usrreqs =           &nousrreqs
 230 },
 231 {
 232         .pr_type =              SOCK_RAW,
 233         .pr_domain =            &inetdomain,
 234         .pr_protocol =          IPPROTO_IPCOMP,
 235         .pr_flags =             PR_ATOMIC|PR_ADDR,
 236         .pr_input =             ipcomp4_input,
 237         .pr_usrreqs =           &nousrreqs
 238 },
 239 #endif /* FAST_IPSEC */
 240 {
 241         .pr_type =              SOCK_RAW,
 242         .pr_domain =            &inetdomain,
 243         .pr_protocol =          IPPROTO_IPV4,
 244         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 245         .pr_input =             encap4_input,
 246         .pr_ctloutput =         rip_ctloutput,
 247         .pr_init =              encap_init,
 248         .pr_usrreqs =           &rip_usrreqs
 249 },
 250 {
 251         .pr_type =              SOCK_RAW,
 252         .pr_domain =            &inetdomain,
 253         .pr_protocol =          IPPROTO_MOBILE,
 254         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 255         .pr_input =             encap4_input,
 256         .pr_ctloutput =         rip_ctloutput,
 257         .pr_init =              encap_init,
 258         .pr_usrreqs =           &rip_usrreqs
 259 },
 260 {
 261         .pr_type =              SOCK_RAW,
 262         .pr_domain =            &inetdomain,
 263         .pr_protocol =          IPPROTO_ETHERIP,
 264         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 265         .pr_input =             encap4_input,
 266         .pr_ctloutput =         rip_ctloutput,
 267         .pr_init =              encap_init,
 268         .pr_usrreqs =           &rip_usrreqs
 269 },
 270 {
 271         .pr_type =              SOCK_RAW,
 272         .pr_domain =            &inetdomain,
 273         .pr_protocol =          IPPROTO_GRE,
 274         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 275         .pr_input =             encap4_input,
 276         .pr_ctloutput =         rip_ctloutput,
 277         .pr_init =              encap_init,
 278         .pr_usrreqs =           &rip_usrreqs
 279 },
 280 # ifdef INET6
 281 {
 282         .pr_type =              SOCK_RAW,
 283         .pr_domain =            &inetdomain,
 284         .pr_protocol =          IPPROTO_IPV6,
 285         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 286         .pr_input =             encap4_input,
 287         .pr_ctloutput =         rip_ctloutput,
 288         .pr_init =              encap_init,
 289         .pr_usrreqs =           &rip_usrreqs
 290 },
 291 #endif
 292 #ifdef IPXIP
 293 {
 294         .pr_type =              SOCK_RAW,
 295         .pr_domain =            &inetdomain,
 296         .pr_protocol =          IPPROTO_IDP,
 297         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 298         .pr_input =             ipxip_input,
 299         .pr_ctlinput =          ipxip_ctlinput,
 300         .pr_usrreqs =           &rip_usrreqs
 301 },
 302 #endif
 303 #ifdef PIM
 304 {
 305         .pr_type =              SOCK_RAW,
 306         .pr_domain =            &inetdomain,
 307         .pr_protocol =          IPPROTO_PIM,
 308         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 309         .pr_input =             pim_input,
 310         .pr_ctloutput =         rip_ctloutput,
 311         .pr_usrreqs =           &rip_usrreqs
 312 },
 313 #endif  /* PIM */
 314 #ifdef DEV_PFSYNC
 315 {
 316         .pr_type =              SOCK_RAW,
 317         .pr_domain =            &inetdomain,
 318         .pr_protocol =          IPPROTO_PFSYNC,
 319         .pr_flags =             PR_ATOMIC|PR_ADDR,
 320         .pr_input =             pfsync_input,
 321         .pr_ctloutput =         rip_ctloutput,
 322         .pr_usrreqs =           &rip_usrreqs
 323 },
 324 #endif  /* DEV_PFSYNC */
 325 #ifdef DEV_CARP
 326 {
 327         .pr_type =              SOCK_RAW,
 328         .pr_domain =            &inetdomain,
 329         .pr_protocol =          IPPROTO_CARP,
 330         .pr_flags =             PR_ATOMIC|PR_ADDR,
 331         .pr_input =             carp_input,
 332         .pr_output =            (pr_output_t*)rip_output,
 333         .pr_ctloutput =         rip_ctloutput,
 334         .pr_usrreqs =           &rip_usrreqs
 335 },
 336 #endif /* DEV_CARP */
 337 /* Spacer n-times for loadable protocols. */
 338 IPPROTOSPACER,
 339 IPPROTOSPACER,
 340 IPPROTOSPACER,
 341 IPPROTOSPACER,
 342 IPPROTOSPACER,
 343 IPPROTOSPACER,
 344 IPPROTOSPACER,
 345 IPPROTOSPACER,
 346 /* raw wildcard */
 347 {
 348         .pr_type =              SOCK_RAW,
 349         .pr_domain =            &inetdomain,
 350         .pr_flags =             PR_ATOMIC|PR_ADDR,
 351         .pr_input =             rip_input,
 352         .pr_ctloutput =         rip_ctloutput,
 353         .pr_init =              rip_init,
 354         .pr_usrreqs =           &rip_usrreqs
 355 },
 356 };
 357
 358 extern int in_inithead(void **, int);
 359
 360 struct domain inetdomain = {
 361         .dom_family =           AF_INET,
 362         .dom_name =             "internet",
 363         .dom_protosw =          inetsw,
 364         .dom_protoswNPROTOSW =  &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 365         .dom_rtattach =         in_inithead,
 366         .dom_rtoffset =         32,
 367         .dom_maxrtkey =         sizeof(struct sockaddr_in)
 368 };
 369
 370 DOMAIN_SET(inet);
 371
 372 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 373         "Internet Family");
 374
 375 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 376 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 377 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 378 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 379 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 380 #ifdef FAST_IPSEC
 381 /* XXX no protocol # to use, pick something "reserved" */
 382 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 383 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 384 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 385 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 386 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 387 #else
 388 #ifdef IPSEC
 389 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 390 #endif /* IPSEC */
 391 #endif /* !FAST_IPSEC */
 392 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 393 #ifdef PIM
 394 SYSCTL_NODE(_net_inet, IPPROTO_PIM,     pim,    CTLFLAG_RW, 0,  "PIM");
 395 #endif
 396 #ifdef DEV_PFSYNC
 397 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC,  pfsync, CTLFLAG_RW, 0,  "PFSYNC");
 398 #endif
 399 #ifdef DEV_CARP
 400 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,   CTLFLAG_RW, 0,  "CARP");
 401 #endif