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 1.13 2005/07/15 17:54:47 eirikn 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
  45 #include <sys/param.h>
  46 #include <sys/kernel.h>
  47 #include <sys/socket.h>
  48 #include <sys/domain.h>
  49 #include <sys/protosw.h>
  50 #include <sys/queue.h>
  51 #include <sys/sysctl.h>
  52
  53 #include <net/if.h>
  54 #include <net/route.h>
  55
  56 #include <netinet/in.h>
  57 #include <netinet/in_systm.h>
  58 #include <netinet/ip.h>
  59 #include <netinet/ip_var.h>
  60 #include <netinet/ip_icmp.h>
  61 #include <netinet/igmp_var.h>
  62 #ifdef PIM
  63 #include <netinet/pim_var.h>
  64 #endif
  65 #include <netinet/tcp.h>
  66 #include <netinet/tcp_timer.h>
  67 #include <netinet/tcp_var.h>
  68 #include <netinet/udp.h>
  69 #include <netinet/udp_var.h>
  70 #include <netinet/ip_encap.h>
  71
  72
  73 /*
  74  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  75  */
  76
  77 #ifdef IPSEC
  78 #include <netinet6/ipsec.h>
  79 #include <netinet6/ah.h>
  80 #ifdef IPSEC_ESP
  81 #include <netinet6/esp.h>
  82 #endif
  83 #include <netinet6/ipcomp.h>
  84 #endif /* IPSEC */
  85
  86 #ifdef FAST_IPSEC
  87 #include <netproto/ipsec/ipsec.h>
  88 #endif /* FAST_IPSEC */
  89
  90 #ifdef IPXIP
  91 #include <netproto/ipx/ipx_ip.h>
  92 #endif
  93
  94 #ifdef NSIP
  95 #include <netns/ns.h>
  96 #include <netns/ns_if.h>
  97 #endif
  98
  99 #ifdef SCTP
 100 #include <netinet/in_pcb.h>
 101 #include <netinet/sctp_pcb.h>
 102 #include <netinet/sctp.h>
 103 #include <netinet/sctp_var.h>
 104 #endif /* SCTP */
 105
 106 #include <net/netisr.h>         /* for cpu0_soport */
 107
 108 extern  struct domain inetdomain;
 109 static  struct pr_usrreqs nousrreqs;
 110
 111 struct protosw inetsw[] = {
 112 { 0,            &inetdomain,    0,              0,
 113   0,            0,              0,              0,
 114   cpu0_soport,
 115   ip_init,      0,              ip_slowtimo,    ip_drain,
 116   &nousrreqs
 117 },
 118 { SOCK_DGRAM,   &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR,
 119   udp_input,    0,              udp_ctlinput,   ip_ctloutput,
 120   udp_soport,
 121   udp_init,     0,              0,              0,
 122   &udp_usrreqs
 123 },
 124 { SOCK_STREAM,  &inetdomain,    IPPROTO_TCP,
 125         PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 126   tcp_input,    0,              tcp_ctlinput,   tcp_ctloutput,
 127   tcp_soport,
 128   tcp_init,     0,              tcp_slowtimo,   tcp_drain,
 129   &tcp_usrreqs
 130 },
 131 #ifdef SCTP
 132 /*
 133  * Order is very important here, we add the good one in
 134  * in this postion so it maps to the right ip_protox[]
 135  * postion for SCTP. Don't move the one above below
 136  * this one or IPv6/4 compatability will break
 137  */
 138 { SOCK_DGRAM,   &inetdomain,    IPPROTO_SCTP,   PR_ADDR_OPT|PR_WANTRCVD,
 139   sctp_input,   0,              sctp_ctlinput,  sctp_ctloutput,
 140   cpu0_soport,
 141   sctp_init,    0,              0,              sctp_drain,
 142   &sctp_usrreqs
 143 },
 144 { SOCK_SEQPACKET,&inetdomain,   IPPROTO_SCTP,   PR_ADDR_OPT|PR_WANTRCVD,
 145   sctp_input,   0,              sctp_ctlinput,  sctp_ctloutput,
 146   cpu0_soport,
 147   0,            0,              0,              sctp_drain,
 148   &sctp_usrreqs
 149 },
 150
 151 { SOCK_STREAM,  &inetdomain,    IPPROTO_SCTP,   PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD,
 152   sctp_input,   0,              sctp_ctlinput,  sctp_ctloutput,
 153   cpu0_soport,
 154   0,            0,              0,              sctp_drain,
 155   &sctp_usrreqs
 156 },
 157 #endif /* SCTP */
 158 { SOCK_RAW,     &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
 159   rip_input,    0,              rip_ctlinput,   rip_ctloutput,
 160   cpu0_soport,
 161   0,            0,              0,              0,
 162   &rip_usrreqs
 163 },
 164 { SOCK_RAW,     &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 165   icmp_input,   0,              0,              rip_ctloutput,
 166   cpu0_soport,
 167   0,            0,              0,              0,
 168   &rip_usrreqs
 169 },
 170 { SOCK_RAW,     &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 171   igmp_input,   0,              0,              rip_ctloutput,
 172   cpu0_soport,
 173   igmp_init,    igmp_fasttimo,  igmp_slowtimo,  0,
 174   &rip_usrreqs
 175 },
 176 { SOCK_RAW,     &inetdomain,    IPPROTO_RSVP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 177   rsvp_input,   0,              0,              rip_ctloutput,
 178   cpu0_soport,
 179   0,            0,              0,              0,
 180   &rip_usrreqs
 181 },
 182 #ifdef IPSEC
 183 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
 184   ah4_input,    0,              0,              0,
 185   cpu0_soport,
 186   0,            0,              0,              0,
 187   &nousrreqs
 188 },
 189 #ifdef IPSEC_ESP
 190 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
 191   esp4_input,   0,              0,              0,
 192   cpu0_soport,
 193   0,            0,              0,              0,
 194   &nousrreqs
 195 },
 196 #endif
 197 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
 198   ipcomp4_input, 0,             0,              0,
 199   cpu0_soport,
 200   0,            0,              0,              0,
 201   &nousrreqs
 202 },
 203 #endif /* IPSEC */
 204 #ifdef FAST_IPSEC
 205 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
 206   ipsec4_common_input,  0,      0,              0,
 207   cpu0_soport,
 208   0,            0,              0,              0,
 209   &nousrreqs
 210 },
 211 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
 212   ipsec4_common_input,  0,      0,              0,
 213   cpu0_soport,
 214   0,            0,              0,              0,
 215   &nousrreqs
 216 },
 217 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
 218   ipsec4_common_input,  0,      0,              0,
 219   cpu0_soport,
 220   0,            0,              0,              0,
 221   &nousrreqs
 222 },
 223 #endif /* FAST_IPSEC */
 224 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 225   encap4_input, 0,              0,              rip_ctloutput,
 226   cpu0_soport,
 227   encap_init,   0,              0,              0,
 228   &rip_usrreqs
 229 },
 230 { SOCK_RAW,     &inetdomain,    IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 231   encap4_input, 0,              0,              rip_ctloutput,
 232   cpu0_soport,
 233   encap_init,   0,              0,              0,
 234   &rip_usrreqs
 235 },
 236 { SOCK_RAW,     &inetdomain,    IPPROTO_GRE,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 237   encap4_input, 0,              0,              rip_ctloutput,
 238   cpu0_soport,
 239   encap_init,   0,              0,              0,
 240   &rip_usrreqs
 241 },
 242 # ifdef INET6
 243 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 244   encap4_input, 0,              0,              rip_ctloutput,
 245   cpu0_soport,
 246   encap_init,   0,              0,              0,
 247   &rip_usrreqs
 248 },
 249 #endif
 250 #ifdef IPDIVERT
 251 { SOCK_RAW,     &inetdomain,    IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR,
 252   div_input,    0,              0,              ip_ctloutput,
 253   cpu0_soport,
 254   div_init,     0,              0,              0,
 255   &div_usrreqs,
 256 },
 257 #endif
 258 #ifdef IPXIP
 259 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 260   ipxip_input,  0,              ipxip_ctlinput, 0,
 261   cpu0_soport,
 262   0,            0,              0,              0,
 263   &rip_usrreqs
 264 },
 265 #endif
 266 #ifdef NSIP
 267 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 268   idpip_input,  0,              nsip_ctlinput,  0,
 269   cpu0_soport,
 270   0,            0,              0,              0,
 271   &rip_usrreqs
 272 },
 273 #endif
 274 #ifdef PIM
 275 { SOCK_RAW,     &inetdomain,    IPPROTO_PIM,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 276   pim_input,    0,              0,              rip_ctloutput,
 277   cpu0_soport,
 278   0,            0,              0,              0,
 279   &rip_usrreqs
 280 },
 281 #endif
 282 #ifdef NPFSYNC
 283 { SOCK_RAW,     &inetdomain,    IPPROTO_PFSYNC, PR_ATOMIC|PR_ADDR,
 284   pfsync_input, 0,              0,              rip_ctloutput,
 285   0,
 286   0,            0,              0,              0,
 287   &rip_usrreqs
 288 },
 289 #endif  /* NPFSYNC */
 290         /* raw wildcard */
 291 { SOCK_RAW,     &inetdomain,    0,              PR_ATOMIC|PR_ADDR,
 292   rip_input,    0,              0,              rip_ctloutput,
 293   cpu0_soport,
 294   rip_init,     0,              0,              0,
 295   &rip_usrreqs
 296 },
 297 };
 298
 299 struct domain inetdomain = {
 300         AF_INET, "internet", NULL, NULL, NULL,
 301         inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 302         SLIST_ENTRY_INITIALIZER,
 303         in_inithead, 32, sizeof(struct sockaddr_in),
 304 };
 305
 306 DOMAIN_SET(inet);
 307
 308 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 309         "Internet Family");
 310
 311 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 312 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 313 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 314 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 315 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 316 #ifdef FAST_IPSEC
 317 /* XXX no protocol # to use, pick something "reserved" */
 318 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 319 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 320 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 321 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 322 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 323 #else
 324 #ifdef IPSEC
 325 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 326 #endif /* IPSEC */
 327 #endif /* !FAST_IPSEC */
 328 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 329 #ifdef IPDIVERT
 330 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 331 #endif
 332 #ifdef PIM
 333 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 334 #endif