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  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include "opt_ipx.h"
  36 #include "opt_mrouting.h"
  37 #include "opt_ipsec.h"
  38 #include "opt_inet6.h"
  39 #include "opt_pf.h"
  40 #include "opt_carp.h"
  41 #include "opt_sctp.h"
  42
  43 #include <sys/param.h>
  44 #include <sys/systm.h>
  45 #include <sys/kernel.h>
  46 #include <sys/socket.h>
  47 #include <sys/domain.h>
  48 #include <sys/protosw.h>
  49 #include <sys/queue.h>
  50 #include <sys/sysctl.h>
  51
  52 #include <net/if.h>
  53 #include <net/route.h>
  54
  55 #include <netinet/in.h>
  56 #include <netinet/in_systm.h>
  57 #include <netinet/ip.h>
  58 #include <netinet/ip_var.h>
  59 #include <netinet/ip_icmp.h>
  60 #include <netinet/igmp_var.h>
  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 <netipsec/ipsec.h>
  76 #endif /* IPSEC */
  77
  78 #ifdef SCTP
  79 #include <netinet/in_pcb.h>
  80 #include <netinet/sctp_pcb.h>
  81 #include <netinet/sctp.h>
  82 #include <netinet/sctp_var.h>
  83 #endif /* SCTP */
  84
  85 #ifdef DEV_PFSYNC
  86 #include <net/pfvar.h>
  87 #include <net/if_pfsync.h>
  88 #endif
  89
  90 #ifdef DEV_CARP
  91 #include <netinet/ip_carp.h>
  92 #endif
  93
  94 extern  struct domain inetdomain;
  95
  96 /* Spacer for loadable protocols. */
  97 #define IPPROTOSPACER                           \
  98 {                                               \
  99         .pr_domain =            &inetdomain,    \
 100         .pr_protocol =          PROTO_SPACER,   \
 101         .pr_usrreqs =           &nousrreqs      \
 102 }
 103
 104 struct protosw inetsw[] = {
 105 {
 106         .pr_type =              0,
 107         .pr_domain =            &inetdomain,
 108         .pr_protocol =          IPPROTO_IP,
 109         .pr_init =              ip_init,
 110         .pr_slowtimo =          ip_slowtimo,
 111         .pr_drain =             ip_drain,
 112         .pr_usrreqs =           &nousrreqs
 113 },
 114 {
 115         .pr_type =              SOCK_DGRAM,
 116         .pr_domain =            &inetdomain,
 117         .pr_protocol =          IPPROTO_UDP,
 118         .pr_flags =             PR_ATOMIC|PR_ADDR,
 119         .pr_input =             udp_input,
 120         .pr_ctlinput =          udp_ctlinput,
 121         .pr_ctloutput =         ip_ctloutput,
 122         .pr_init =              udp_init,
 123         .pr_usrreqs =           &udp_usrreqs
 124 },
 125 {
 126         .pr_type =              SOCK_STREAM,
 127         .pr_domain =            &inetdomain,
 128         .pr_protocol =          IPPROTO_TCP,
 129         .pr_flags =             PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 130         .pr_input =             tcp_input,
 131         .pr_ctlinput =          tcp_ctlinput,
 132         .pr_ctloutput =         tcp_ctloutput,
 133         .pr_init =              tcp_init,
 134         .pr_slowtimo =          tcp_slowtimo,
 135         .pr_drain =             tcp_drain,
 136         .pr_usrreqs =           &tcp_usrreqs
 137 },
 138 #ifdef SCTP
 139 {
 140         .pr_type =      SOCK_DGRAM,
 141         .pr_domain =    &inetdomain,
 142         .pr_protocol =  IPPROTO_SCTP,
 143         .pr_flags =     PR_WANTRCVD,
 144         .pr_input =     sctp_input,
 145         .pr_ctlinput =  sctp_ctlinput,
 146         .pr_ctloutput = sctp_ctloutput,
 147         .pr_init =      sctp_init,
 148         .pr_drain =     sctp_drain,
 149         .pr_usrreqs =   &sctp_usrreqs
 150 },
 151 {
 152         .pr_type =      SOCK_SEQPACKET,
 153         .pr_domain =    &inetdomain,
 154         .pr_protocol =  IPPROTO_SCTP,
 155         .pr_flags =     PR_WANTRCVD,
 156         .pr_input =     sctp_input,
 157         .pr_ctlinput =  sctp_ctlinput,
 158         .pr_ctloutput = sctp_ctloutput,
 159         .pr_drain =     sctp_drain,
 160         .pr_usrreqs =   &sctp_usrreqs
 161 },
 162
 163 {
 164         .pr_type =      SOCK_STREAM,
 165         .pr_domain =    &inetdomain,
 166         .pr_protocol =  IPPROTO_SCTP,
 167         .pr_flags =     PR_WANTRCVD,
 168         .pr_input =     sctp_input,
 169         .pr_ctlinput =  sctp_ctlinput,
 170         .pr_ctloutput = sctp_ctloutput,
 171         .pr_drain =     sctp_drain,
 172         .pr_usrreqs =   &sctp_usrreqs
 173 },
 174 #endif /* SCTP */
 175 {
 176         .pr_type =              SOCK_RAW,
 177         .pr_domain =            &inetdomain,
 178         .pr_protocol =          IPPROTO_RAW,
 179         .pr_flags =             PR_ATOMIC|PR_ADDR,
 180         .pr_input =             rip_input,
 181         .pr_ctlinput =          rip_ctlinput,
 182         .pr_ctloutput =         rip_ctloutput,
 183         .pr_usrreqs =           &rip_usrreqs
 184 },
 185 {
 186         .pr_type =              SOCK_RAW,
 187         .pr_domain =            &inetdomain,
 188         .pr_protocol =          IPPROTO_ICMP,
 189         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 190         .pr_input =             icmp_input,
 191         .pr_ctloutput =         rip_ctloutput,
 192         .pr_usrreqs =           &rip_usrreqs
 193 },
 194 {
 195         .pr_type =              SOCK_RAW,
 196         .pr_domain =            &inetdomain,
 197         .pr_protocol =          IPPROTO_IGMP,
 198         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 199         .pr_input =             igmp_input,
 200         .pr_ctloutput =         rip_ctloutput,
 201         .pr_init =              igmp_init,
 202         .pr_fasttimo =          igmp_fasttimo,
 203         .pr_slowtimo =          igmp_slowtimo,
 204         .pr_usrreqs =           &rip_usrreqs
 205 },
 206 {
 207         .pr_type =              SOCK_RAW,
 208         .pr_domain =            &inetdomain,
 209         .pr_protocol =          IPPROTO_RSVP,
 210         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 211         .pr_input =             rsvp_input,
 212         .pr_ctloutput =         rip_ctloutput,
 213         .pr_usrreqs =           &rip_usrreqs
 214 },
 215 #ifdef IPSEC
 216 {
 217         .pr_type =              SOCK_RAW,
 218         .pr_domain =            &inetdomain,
 219         .pr_protocol =          IPPROTO_AH,
 220         .pr_flags =             PR_ATOMIC|PR_ADDR,
 221         .pr_input =             ah4_input,
 222         .pr_ctlinput =          ah4_ctlinput,
 223         .pr_usrreqs =           &nousrreqs
 224 },
 225 {
 226         .pr_type =              SOCK_RAW,
 227         .pr_domain =            &inetdomain,
 228         .pr_protocol =          IPPROTO_ESP,
 229         .pr_flags =             PR_ATOMIC|PR_ADDR,
 230         .pr_input =             esp4_input,
 231         .pr_ctlinput =          esp4_ctlinput,
 232         .pr_usrreqs =           &nousrreqs
 233 },
 234 {
 235         .pr_type =              SOCK_RAW,
 236         .pr_domain =            &inetdomain,
 237         .pr_protocol =          IPPROTO_IPCOMP,
 238         .pr_flags =             PR_ATOMIC|PR_ADDR,
 239         .pr_input =             ipcomp4_input,
 240         .pr_usrreqs =           &nousrreqs
 241 },
 242 #endif /* IPSEC */
 243 {
 244         .pr_type =              SOCK_RAW,
 245         .pr_domain =            &inetdomain,
 246         .pr_protocol =          IPPROTO_IPV4,
 247         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 248         .pr_input =             encap4_input,
 249         .pr_ctloutput =         rip_ctloutput,
 250         .pr_init =              encap_init,
 251         .pr_usrreqs =           &rip_usrreqs
 252 },
 253 {
 254         .pr_type =              SOCK_RAW,
 255         .pr_domain =            &inetdomain,
 256         .pr_protocol =          IPPROTO_MOBILE,
 257         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 258         .pr_input =             encap4_input,
 259         .pr_ctloutput =         rip_ctloutput,
 260         .pr_init =              encap_init,
 261         .pr_usrreqs =           &rip_usrreqs
 262 },
 263 {
 264         .pr_type =              SOCK_RAW,
 265         .pr_domain =            &inetdomain,
 266         .pr_protocol =          IPPROTO_ETHERIP,
 267         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 268         .pr_input =             encap4_input,
 269         .pr_ctloutput =         rip_ctloutput,
 270         .pr_init =              encap_init,
 271         .pr_usrreqs =           &rip_usrreqs
 272 },
 273 {
 274         .pr_type =              SOCK_RAW,
 275         .pr_domain =            &inetdomain,
 276         .pr_protocol =          IPPROTO_GRE,
 277         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 278         .pr_input =             encap4_input,
 279         .pr_ctloutput =         rip_ctloutput,
 280         .pr_init =              encap_init,
 281         .pr_usrreqs =           &rip_usrreqs
 282 },
 283 # ifdef INET6
 284 {
 285         .pr_type =              SOCK_RAW,
 286         .pr_domain =            &inetdomain,
 287         .pr_protocol =          IPPROTO_IPV6,
 288         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 289         .pr_input =             encap4_input,
 290         .pr_ctloutput =         rip_ctloutput,
 291         .pr_init =              encap_init,
 292         .pr_usrreqs =           &rip_usrreqs
 293 },
 294 #endif
 295 {
 296         .pr_type =              SOCK_RAW,
 297         .pr_domain =            &inetdomain,
 298         .pr_protocol =          IPPROTO_PIM,
 299         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 300         .pr_input =             encap4_input,
 301         .pr_ctloutput =         rip_ctloutput,
 302         .pr_usrreqs =           &rip_usrreqs
 303 },
 304 #ifdef DEV_PFSYNC
 305 {
 306         .pr_type =              SOCK_RAW,
 307         .pr_domain =            &inetdomain,
 308         .pr_protocol =          IPPROTO_PFSYNC,
 309         .pr_flags =             PR_ATOMIC|PR_ADDR,
 310         .pr_input =             pfsync_input,
 311         .pr_ctloutput =         rip_ctloutput,
 312         .pr_usrreqs =           &rip_usrreqs
 313 },
 314 #endif  /* DEV_PFSYNC */
 315 #ifdef DEV_CARP
 316 {
 317         .pr_type =              SOCK_RAW,
 318         .pr_domain =            &inetdomain,
 319         .pr_protocol =          IPPROTO_CARP,
 320         .pr_flags =             PR_ATOMIC|PR_ADDR,
 321         .pr_input =             carp_input,
 322         .pr_output =            (pr_output_t*)rip_output,
 323         .pr_ctloutput =         rip_ctloutput,
 324         .pr_usrreqs =           &rip_usrreqs
 325 },
 326 #endif /* DEV_CARP */
 327 /* Spacer n-times for loadable protocols. */
 328 IPPROTOSPACER,
 329 IPPROTOSPACER,
 330 IPPROTOSPACER,
 331 IPPROTOSPACER,
 332 IPPROTOSPACER,
 333 IPPROTOSPACER,
 334 IPPROTOSPACER,
 335 IPPROTOSPACER,
 336 /* raw wildcard */
 337 {
 338         .pr_type =              SOCK_RAW,
 339         .pr_domain =            &inetdomain,
 340         .pr_flags =             PR_ATOMIC|PR_ADDR,
 341         .pr_input =             rip_input,
 342         .pr_ctloutput =         rip_ctloutput,
 343         .pr_init =              rip_init,
 344         .pr_usrreqs =           &rip_usrreqs
 345 },
 346 };
 347
 348 extern int in_inithead(void **, int);
 349
 350 struct domain inetdomain = {
 351         .dom_family =           AF_INET,
 352         .dom_name =             "internet",
 353         .dom_protosw =          inetsw,
 354         .dom_protoswNPROTOSW =  &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 355         .dom_rtattach =         in_inithead,
 356         .dom_rtoffset =         32,
 357         .dom_maxrtkey =         sizeof(struct sockaddr_in)
 358 };
 359
 360 DOMAIN_SET(inet);
 361
 362 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 363         "Internet Family");
 364
 365 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 366 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 367 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 368 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 369 #ifdef SCTP
 370 SYSCTL_NODE(_net_inet, IPPROTO_SCTP,    sctp,   CTLFLAG_RW, 0,  "SCTP");
 371 #endif
 372 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 373 #ifdef IPSEC
 374 /* XXX no protocol # to use, pick something "reserved" */
 375 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 376 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 377 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 378 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 379 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 380 #endif /* IPSEC */
 381 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 382 #ifdef DEV_PFSYNC
 383 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC,  pfsync, CTLFLAG_RW, 0,  "PFSYNC");
 384 #endif
 385 #ifdef DEV_CARP
 386 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,   CTLFLAG_RW, 0,  "CARP");
 387 #endif