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  * $DragonFly: src/sys/netinet/in_proto.c,v 1.17 2008/10/27 02:56:30 sephe Exp $
  36  */
  37
  38 #include "opt_ipdivert.h"
  39 #include "opt_ipx.h"
  40 #include "opt_mrouting.h"
  41 #include "opt_ipsec.h"
  42 #include "opt_inet6.h"
  43 #include "opt_sctp.h"
  44 #include "opt_carp.h"
  45
  46 #include <sys/param.h>
  47 #include <sys/kernel.h>
  48 #include <sys/socket.h>
  49 #include <sys/domain.h>
  50 #include <sys/protosw.h>
  51 #include <sys/queue.h>
  52 #include <sys/sysctl.h>
  53
  54 #include <net/if.h>
  55 #include <net/route.h>
  56
  57 #include <netinet/in.h>
  58 #include <netinet/in_systm.h>
  59 #include <netinet/ip.h>
  60 #include <netinet/ip_var.h>
  61 #include <netinet/ip_icmp.h>
  62 #include <netinet/igmp_var.h>
  63 #ifdef PIM
  64 #include <netinet/pim_var.h>
  65 #endif
  66 #include <netinet/tcp.h>
  67 #include <netinet/tcp_timer.h>
  68 #include <netinet/tcp_var.h>
  69 #include <netinet/udp.h>
  70 #include <netinet/udp_var.h>
  71 #include <netinet/ip_encap.h>
  72 #ifdef IPDIVERT
  73 #include <netinet/ip_divert.h>
  74 #endif
  75
  76 /*
  77  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  78  */
  79
  80 #ifdef IPSEC
  81 #include <netinet6/ipsec.h>
  82 #include <netinet6/ah.h>
  83 #ifdef IPSEC_ESP
  84 #include <netinet6/esp.h>
  85 #endif
  86 #include <netinet6/ipcomp.h>
  87 #endif /* IPSEC */
  88
  89 #ifdef FAST_IPSEC
  90 #include <netproto/ipsec/ipsec.h>
  91 #endif /* FAST_IPSEC */
  92
  93 #ifdef IPXIP
  94 #include <netproto/ipx/ipx_ip.h>
  95 #endif
  96
  97 #ifdef NSIP
  98 #include <netns/ns.h>
  99 #include <netns/ns_if.h>
 100 #endif
 101
 102 #ifdef SCTP
 103 #include <netinet/in_pcb.h>
 104 #include <netinet/sctp_pcb.h>
 105 #include <netinet/sctp.h>
 106 #include <netinet/sctp_var.h>
 107 #endif /* SCTP */
 108
 109 #include <net/netisr.h>         /* for cpu0_soport */
 110
 111 #ifdef CARP
 112 #include <netinet/ip_carp.h>
 113 #endif
 114
 115 extern  struct domain inetdomain;
 116 static  struct pr_usrreqs nousrreqs;
 117
 118 struct protosw inetsw[] = {
 119 { 0,            &inetdomain,    0,              0,
 120   0,            0,              0,              0,
 121   cpu0_soport,  NULL,
 122   ip_init,      0,              ip_slowtimo,    ip_drain,
 123   &nousrreqs
 124 },
 125 { SOCK_DGRAM,   &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR,
 126   udp_input,    0,              udp_ctlinput,   ip_ctloutput,
 127   udp_soport,   udp_ctlport,
 128   udp_init,     0,              0,              0,
 129   &udp_usrreqs
 130 },
 131 { SOCK_STREAM,  &inetdomain,    IPPROTO_TCP,
 132         PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 133   tcp_input,    0,              tcp_ctlinput,   tcp_ctloutput,
 134   tcp_soport,   tcp_ctlport,
 135   tcp_init,     0,              tcp_slowtimo,   tcp_drain,
 136   &tcp_usrreqs
 137 },
 138 #ifdef SCTP
 139 /*
 140  * Order is very important here, we add the good one in
 141  * in this postion so it maps to the right ip_protox[]
 142  * postion for SCTP. Don't move the one above below
 143  * this one or IPv6/4 compatability will break
 144  */
 145 { SOCK_DGRAM,   &inetdomain,    IPPROTO_SCTP,   PR_ADDR_OPT|PR_WANTRCVD,
 146   sctp_input,   0,              sctp_ctlinput,  sctp_ctloutput,
 147   cpu0_soport,  cpu0_ctlport,
 148   sctp_init,    0,              0,              sctp_drain,
 149   &sctp_usrreqs
 150 },
 151 { SOCK_SEQPACKET,&inetdomain,   IPPROTO_SCTP,   PR_ADDR_OPT|PR_WANTRCVD,
 152   sctp_input,   0,              sctp_ctlinput,  sctp_ctloutput,
 153   cpu0_soport,  cpu0_ctlport,
 154   0,            0,              0,              sctp_drain,
 155   &sctp_usrreqs
 156 },
 157
 158 { SOCK_STREAM,  &inetdomain,    IPPROTO_SCTP,   PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD,
 159   sctp_input,   0,              sctp_ctlinput,  sctp_ctloutput,
 160   cpu0_soport,  cpu0_ctlport,
 161   0,            0,              0,              sctp_drain,
 162   &sctp_usrreqs
 163 },
 164 #endif /* SCTP */
 165 { SOCK_RAW,     &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
 166   rip_input,    0,              rip_ctlinput,   rip_ctloutput,
 167   cpu0_soport,  cpu0_ctlport,
 168   0,            0,              0,              0,
 169   &rip_usrreqs
 170 },
 171 { SOCK_RAW,     &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 172   icmp_input,   0,              0,              rip_ctloutput,
 173   cpu0_soport,  NULL,
 174   0,            0,              0,              0,
 175   &rip_usrreqs
 176 },
 177 { SOCK_RAW,     &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 178   igmp_input,   0,              0,              rip_ctloutput,
 179   cpu0_soport,  NULL,
 180   igmp_init,    igmp_fasttimo,  igmp_slowtimo,  0,
 181   &rip_usrreqs
 182 },
 183 { SOCK_RAW,     &inetdomain,    IPPROTO_RSVP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 184   rsvp_input,   0,              0,              rip_ctloutput,
 185   cpu0_soport,  NULL,
 186   0,            0,              0,              0,
 187   &rip_usrreqs
 188 },
 189 #ifdef IPSEC
 190 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
 191   ah4_input,    0,              0,              0,
 192   cpu0_soport,  NULL,
 193   0,            0,              0,              0,
 194   &nousrreqs
 195 },
 196 #ifdef IPSEC_ESP
 197 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
 198   esp4_input,   0,              0,              0,
 199   cpu0_soport,  NULL,
 200   0,            0,              0,              0,
 201   &nousrreqs
 202 },
 203 #endif
 204 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
 205   ipcomp4_input, 0,             0,              0,
 206   cpu0_soport,  NULL,
 207   0,            0,              0,              0,
 208   &nousrreqs
 209 },
 210 #endif /* IPSEC */
 211 #ifdef FAST_IPSEC
 212 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
 213   ipsec4_common_input,  0,      0,              0,
 214   cpu0_soport,  NULL,
 215   0,            0,              0,              0,
 216   &nousrreqs
 217 },
 218 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
 219   ipsec4_common_input,  0,      0,              0,
 220   cpu0_soport,  NULL,
 221   0,            0,              0,              0,
 222   &nousrreqs
 223 },
 224 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
 225   ipsec4_common_input,  0,      0,              0,
 226   cpu0_soport,  NULL,
 227   0,            0,              0,              0,
 228   &nousrreqs
 229 },
 230 #endif /* FAST_IPSEC */
 231 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 232   encap4_input, 0,              0,              rip_ctloutput,
 233   cpu0_soport,  NULL,
 234   encap_init,   0,              0,              0,
 235   &rip_usrreqs
 236 },
 237 { SOCK_RAW,     &inetdomain,    IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 238   encap4_input, 0,              0,              rip_ctloutput,
 239   cpu0_soport,  NULL,
 240   encap_init,   0,              0,              0,
 241   &rip_usrreqs
 242 },
 243 { SOCK_RAW,     &inetdomain,    IPPROTO_GRE,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 244   encap4_input, 0,              0,              rip_ctloutput,
 245   cpu0_soport,  NULL,
 246   encap_init,   0,              0,              0,
 247   &rip_usrreqs
 248 },
 249 # ifdef INET6
 250 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 251   encap4_input, 0,              0,              rip_ctloutput,
 252   cpu0_soport,  NULL,
 253   encap_init,   0,              0,              0,
 254   &rip_usrreqs
 255 },
 256 #endif
 257 #ifdef IPDIVERT
 258 { SOCK_RAW,     &inetdomain,    IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR,
 259   div_input,    0,              0,              ip_ctloutput,
 260   div_soport,   NULL,
 261   div_init,     0,              0,              0,
 262   &div_usrreqs,
 263 },
 264 #endif
 265 #ifdef IPXIP
 266 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 267   ipxip_input,  0,              ipxip_ctlinput, 0,
 268   cpu0_soport,  cpu0_ctlport,
 269   0,            0,              0,              0,
 270   &rip_usrreqs
 271 },
 272 #endif
 273 #ifdef NSIP
 274 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 275   idpip_input,  0,              nsip_ctlinput,  0,
 276   cpu0_soport,  cpu0_ctlport,
 277   0,            0,              0,              0,
 278   &rip_usrreqs
 279 },
 280 #endif
 281 #ifdef PIM
 282 { SOCK_RAW,     &inetdomain,    IPPROTO_PIM,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 283   pim_input,    0,              0,              rip_ctloutput,
 284   cpu0_soport,  NULL,
 285   0,            0,              0,              0,
 286   &rip_usrreqs
 287 },
 288 #endif
 289 #ifdef NPFSYNC
 290 { SOCK_RAW,     &inetdomain,    IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR,
 291   pfsync_input, 0,              0,              rip_ctloutput,
 292   cpu0_soport,  NULL,
 293   0,            0,              0,              0,
 294   &rip_usrreqs
 295 },
 296 #endif  /* NPFSYNC */
 297         /* raw wildcard */
 298 { SOCK_RAW,     &inetdomain,    0,              PR_ATOMIC|PR_ADDR,
 299   rip_input,    0,              0,              rip_ctloutput,
 300   cpu0_soport,  NULL,
 301   rip_init,     0,              0,              0,
 302   &rip_usrreqs
 303 },
 304
 305 #ifdef CARP
 306 { SOCK_RAW,     &inetdomain,    IPPROTO_CARP,   PR_ATOMIC|PR_ADDR,
 307   carp_input,   rip_output,     0,              rip_ctloutput,
 308   cpu0_soport,  NULL,
 309   0,            0,              0,              0,
 310   &rip_usrreqs
 311 },
 312
 313 #endif
 314 };
 315
 316 struct domain inetdomain = {
 317         AF_INET, "internet", NULL, NULL, NULL,
 318         inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 319         SLIST_ENTRY_INITIALIZER,
 320         in_inithead, 32, sizeof(struct sockaddr_in),
 321 };
 322
 323 DOMAIN_SET(inet);
 324
 325 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 326         "Internet Family");
 327
 328 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 329 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 330 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 331 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 332 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 333 #ifdef FAST_IPSEC
 334 /* XXX no protocol # to use, pick something "reserved" */
 335 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 336 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 337 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 338 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 339 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 340 #else
 341 #ifdef IPSEC
 342 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 343 #endif /* IPSEC */
 344 #endif /* !FAST_IPSEC */
 345 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 346 #ifdef IPDIVERT
 347 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 348 #endif
 349 #ifdef PIM
 350 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 351 #endif
 352 #ifdef CARP
 353 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,    CTLFLAG_RW, 0,  "CARP");
 354 #endif