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 1.14 2007/08/16 20:03:57 dillon 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
  73
  74 /*
  75  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  76  */
  77
  78 #ifdef IPSEC
  79 #include <netinet6/ipsec.h>
  80 #include <netinet6/ah.h>
  81 #ifdef IPSEC_ESP
  82 #include <netinet6/esp.h>
  83 #endif
  84 #include <netinet6/ipcomp.h>
  85 #endif /* IPSEC */
  86
  87 #ifdef FAST_IPSEC
  88 #include <netproto/ipsec/ipsec.h>
  89 #endif /* FAST_IPSEC */
  90
  91 #ifdef IPXIP
  92 #include <netproto/ipx/ipx_ip.h>
  93 #endif
  94
  95 #ifdef NSIP
  96 #include <netns/ns.h>
  97 #include <netns/ns_if.h>
  98 #endif
  99
 100 #ifdef SCTP
 101 #include <netinet/in_pcb.h>
 102 #include <netinet/sctp_pcb.h>
 103 #include <netinet/sctp.h>
 104 #include <netinet/sctp_var.h>
 105 #endif /* SCTP */
 106
 107 #include <net/netisr.h>         /* for cpu0_soport */
 108
 109 #ifdef CARP
 110 #include <netinet/ip_carp.h>
 111 #endif
 112
 113 extern  struct domain inetdomain;
 114 static  struct pr_usrreqs nousrreqs;
 115
 116 struct protosw inetsw[] = {
 117 { 0,            &inetdomain,    0,              0,
 118   0,            0,              0,              0,
 119   cpu0_soport,
 120   ip_init,      0,              ip_slowtimo,    ip_drain,
 121   &nousrreqs
 122 },
 123 { SOCK_DGRAM,   &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR,
 124   udp_input,    0,              udp_ctlinput,   ip_ctloutput,
 125   udp_soport,
 126   udp_init,     0,              0,              0,
 127   &udp_usrreqs
 128 },
 129 { SOCK_STREAM,  &inetdomain,    IPPROTO_TCP,
 130         PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 131   tcp_input,    0,              tcp_ctlinput,   tcp_ctloutput,
 132   tcp_soport,
 133   tcp_init,     0,              tcp_slowtimo,   tcp_drain,
 134   &tcp_usrreqs
 135 },
 136 #ifdef SCTP
 137 /*
 138  * Order is very important here, we add the good one in
 139  * in this postion so it maps to the right ip_protox[]
 140  * postion for SCTP. Don't move the one above below
 141  * this one or IPv6/4 compatability will break
 142  */
 143 { SOCK_DGRAM,   &inetdomain,    IPPROTO_SCTP,   PR_ADDR_OPT|PR_WANTRCVD,
 144   sctp_input,   0,              sctp_ctlinput,  sctp_ctloutput,
 145   cpu0_soport,
 146   sctp_init,    0,              0,              sctp_drain,
 147   &sctp_usrreqs
 148 },
 149 { SOCK_SEQPACKET,&inetdomain,   IPPROTO_SCTP,   PR_ADDR_OPT|PR_WANTRCVD,
 150   sctp_input,   0,              sctp_ctlinput,  sctp_ctloutput,
 151   cpu0_soport,
 152   0,            0,              0,              sctp_drain,
 153   &sctp_usrreqs
 154 },
 155
 156 { SOCK_STREAM,  &inetdomain,    IPPROTO_SCTP,   PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD,
 157   sctp_input,   0,              sctp_ctlinput,  sctp_ctloutput,
 158   cpu0_soport,
 159   0,            0,              0,              sctp_drain,
 160   &sctp_usrreqs
 161 },
 162 #endif /* SCTP */
 163 { SOCK_RAW,     &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
 164   rip_input,    0,              rip_ctlinput,   rip_ctloutput,
 165   cpu0_soport,
 166   0,            0,              0,              0,
 167   &rip_usrreqs
 168 },
 169 { SOCK_RAW,     &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 170   icmp_input,   0,              0,              rip_ctloutput,
 171   cpu0_soport,
 172   0,            0,              0,              0,
 173   &rip_usrreqs
 174 },
 175 { SOCK_RAW,     &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 176   igmp_input,   0,              0,              rip_ctloutput,
 177   cpu0_soport,
 178   igmp_init,    igmp_fasttimo,  igmp_slowtimo,  0,
 179   &rip_usrreqs
 180 },
 181 { SOCK_RAW,     &inetdomain,    IPPROTO_RSVP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 182   rsvp_input,   0,              0,              rip_ctloutput,
 183   cpu0_soport,
 184   0,            0,              0,              0,
 185   &rip_usrreqs
 186 },
 187 #ifdef IPSEC
 188 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
 189   ah4_input,    0,              0,              0,
 190   cpu0_soport,
 191   0,            0,              0,              0,
 192   &nousrreqs
 193 },
 194 #ifdef IPSEC_ESP
 195 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
 196   esp4_input,   0,              0,              0,
 197   cpu0_soport,
 198   0,            0,              0,              0,
 199   &nousrreqs
 200 },
 201 #endif
 202 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
 203   ipcomp4_input, 0,             0,              0,
 204   cpu0_soport,
 205   0,            0,              0,              0,
 206   &nousrreqs
 207 },
 208 #endif /* IPSEC */
 209 #ifdef FAST_IPSEC
 210 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
 211   ipsec4_common_input,  0,      0,              0,
 212   cpu0_soport,
 213   0,            0,              0,              0,
 214   &nousrreqs
 215 },
 216 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
 217   ipsec4_common_input,  0,      0,              0,
 218   cpu0_soport,
 219   0,            0,              0,              0,
 220   &nousrreqs
 221 },
 222 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
 223   ipsec4_common_input,  0,      0,              0,
 224   cpu0_soport,
 225   0,            0,              0,              0,
 226   &nousrreqs
 227 },
 228 #endif /* FAST_IPSEC */
 229 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 230   encap4_input, 0,              0,              rip_ctloutput,
 231   cpu0_soport,
 232   encap_init,   0,              0,              0,
 233   &rip_usrreqs
 234 },
 235 { SOCK_RAW,     &inetdomain,    IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 236   encap4_input, 0,              0,              rip_ctloutput,
 237   cpu0_soport,
 238   encap_init,   0,              0,              0,
 239   &rip_usrreqs
 240 },
 241 { SOCK_RAW,     &inetdomain,    IPPROTO_GRE,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 242   encap4_input, 0,              0,              rip_ctloutput,
 243   cpu0_soport,
 244   encap_init,   0,              0,              0,
 245   &rip_usrreqs
 246 },
 247 # ifdef INET6
 248 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 249   encap4_input, 0,              0,              rip_ctloutput,
 250   cpu0_soport,
 251   encap_init,   0,              0,              0,
 252   &rip_usrreqs
 253 },
 254 #endif
 255 #ifdef IPDIVERT
 256 { SOCK_RAW,     &inetdomain,    IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR,
 257   div_input,    0,              0,              ip_ctloutput,
 258   cpu0_soport,
 259   div_init,     0,              0,              0,
 260   &div_usrreqs,
 261 },
 262 #endif
 263 #ifdef IPXIP
 264 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 265   ipxip_input,  0,              ipxip_ctlinput, 0,
 266   cpu0_soport,
 267   0,            0,              0,              0,
 268   &rip_usrreqs
 269 },
 270 #endif
 271 #ifdef NSIP
 272 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 273   idpip_input,  0,              nsip_ctlinput,  0,
 274   cpu0_soport,
 275   0,            0,              0,              0,
 276   &rip_usrreqs
 277 },
 278 #endif
 279 #ifdef PIM
 280 { SOCK_RAW,     &inetdomain,    IPPROTO_PIM,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 281   pim_input,    0,              0,              rip_ctloutput,
 282   cpu0_soport,
 283   0,            0,              0,              0,
 284   &rip_usrreqs
 285 },
 286 #endif
 287 #ifdef NPFSYNC
 288 { SOCK_RAW,     &inetdomain,    IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR,
 289   pfsync_input, 0,              0,              rip_ctloutput,
 290   0,
 291   0,            0,              0,              0,
 292   &rip_usrreqs
 293 },
 294 #endif  /* NPFSYNC */
 295         /* raw wildcard */
 296 { SOCK_RAW,     &inetdomain,    0,              PR_ATOMIC|PR_ADDR,
 297   rip_input,    0,              0,              rip_ctloutput,
 298   cpu0_soport,
 299   rip_init,     0,              0,              0,
 300   &rip_usrreqs
 301 },
 302
 303 #ifdef CARP
 304  { SOCK_RAW,     &inetdomain,    IPPROTO_CARP,   PR_ATOMIC|PR_ADDR,
 305   carp_input,   rip_output,       0,      rip_ctloutput,
 306   0,
 307   0,            0,              0,              0,
 308   &rip_usrreqs
 309 },
 310
 311 #endif
 312 };
 313
 314 struct domain inetdomain = {
 315         AF_INET, "internet", NULL, NULL, NULL,
 316         inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 317         SLIST_ENTRY_INITIALIZER,
 318         in_inithead, 32, sizeof(struct sockaddr_in),
 319 };
 320
 321 DOMAIN_SET(inet);
 322
 323 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 324         "Internet Family");
 325
 326 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 327 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 328 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 329 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 330 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 331 #ifdef FAST_IPSEC
 332 /* XXX no protocol # to use, pick something "reserved" */
 333 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 334 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 335 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 336 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 337 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 338 #else
 339 #ifdef IPSEC
 340 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 341 #endif /* IPSEC */
 342 #endif /* !FAST_IPSEC */
 343 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 344 #ifdef IPDIVERT
 345 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 346 #endif
 347 #ifdef PIM
 348 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 349 #endif
 350 #ifdef CARP
 351 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,    CTLFLAG_RW, 0,  "CARP");
 352 #endif