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_inet.h"
  39 #include "opt_inet6.h"
  40 #include "opt_sctp.h"
  41 #include "opt_mpath.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/proc.h>
  49 #include <sys/protosw.h>
  50 #include <sys/queue.h>
  51 #include <sys/sysctl.h>
  52
  53 /*
  54  * While this file provides the domain and protocol switch tables for IPv4, it
  55  * also provides the sysctl node declarations for net.inet.* often shared with
  56  * IPv6 for common features or by upper layer protocols.  In case of no IPv4
  57  * support compile out everything but these sysctl nodes.
  58  */
  59 #ifdef INET
  60 #include <net/if.h>
  61 #include <net/route.h>
  62 #ifdef RADIX_MPATH
  63 #include <net/radix_mpath.h>
  64 #endif
  65 #include <net/vnet.h>
  66 #endif /* INET */
  67
  68 #if defined(INET) || defined(INET6)
  69 #include <netinet/in.h>
  70 #endif
  71
  72 #ifdef INET
  73 #include <netinet/in_systm.h>
  74 #include <netinet/in_var.h>
  75 #include <netinet/ip.h>
  76 #include <netinet/ip_var.h>
  77 #include <netinet/ip_icmp.h>
  78 #include <netinet/igmp_var.h>
  79 #include <netinet/tcp.h>
  80 #include <netinet/tcp_timer.h>
  81 #include <netinet/tcp_var.h>
  82 #include <netinet/udp.h>
  83 #include <netinet/udp_var.h>
  84 #include <netinet/ip_encap.h>
  85
  86 /*
  87  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  88  */
  89
  90 static struct pr_usrreqs nousrreqs;
  91
  92 #ifdef IPSEC
  93 #include <netipsec/ipsec.h>
  94 #endif /* IPSEC */
  95
  96 #ifdef SCTP
  97 #include <netinet/in_pcb.h>
  98 #include <netinet/sctp_pcb.h>
  99 #include <netinet/sctp.h>
 100 #include <netinet/sctp_var.h>
 101 #endif /* SCTP */
 102
 103 FEATURE(inet, "Internet Protocol version 4");
 104
 105 extern  struct domain inetdomain;
 106
 107 /* Spacer for loadable protocols. */
 108 #define IPPROTOSPACER                           \
 109 {                                               \
 110         .pr_domain =            &inetdomain,    \
 111         .pr_protocol =          PROTO_SPACER,   \
 112         .pr_usrreqs =           &nousrreqs      \
 113 }
 114
 115 struct protosw inetsw[] = {
 116 {
 117         .pr_type =              0,
 118         .pr_domain =            &inetdomain,
 119         .pr_protocol =          IPPROTO_IP,
 120         .pr_init =              ip_init,
 121 #ifdef VIMAGE
 122         .pr_destroy =           ip_destroy,
 123 #endif
 124         .pr_slowtimo =          ip_slowtimo,
 125         .pr_drain =             ip_drain,
 126         .pr_usrreqs =           &nousrreqs
 127 },
 128 {
 129         .pr_type =              SOCK_DGRAM,
 130         .pr_domain =            &inetdomain,
 131         .pr_protocol =          IPPROTO_UDP,
 132         .pr_flags =             PR_ATOMIC|PR_ADDR,
 133         .pr_input =             udp_input,
 134         .pr_ctlinput =          udp_ctlinput,
 135         .pr_ctloutput =         udp_ctloutput,
 136         .pr_init =              udp_init,
 137 #ifdef VIMAGE
 138         .pr_destroy =           udp_destroy,
 139 #endif
 140         .pr_usrreqs =           &udp_usrreqs
 141 },
 142 {
 143         .pr_type =              SOCK_STREAM,
 144         .pr_domain =            &inetdomain,
 145         .pr_protocol =          IPPROTO_TCP,
 146         .pr_flags =             PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 147         .pr_input =             tcp_input,
 148         .pr_ctlinput =          tcp_ctlinput,
 149         .pr_ctloutput =         tcp_ctloutput,
 150         .pr_init =              tcp_init,
 151 #ifdef VIMAGE
 152         .pr_destroy =           tcp_destroy,
 153 #endif
 154         .pr_slowtimo =          tcp_slowtimo,
 155         .pr_drain =             tcp_drain,
 156         .pr_usrreqs =           &tcp_usrreqs
 157 },
 158 #ifdef SCTP
 159 {
 160         .pr_type =              SOCK_SEQPACKET,
 161         .pr_domain =            &inetdomain,
 162         .pr_protocol =          IPPROTO_SCTP,
 163         .pr_flags =             PR_WANTRCVD,
 164         .pr_input =             sctp_input,
 165         .pr_ctlinput =          sctp_ctlinput,
 166         .pr_ctloutput =         sctp_ctloutput,
 167         .pr_init =              sctp_init,
 168 #ifdef VIMAGE
 169         .pr_destroy =           sctp_finish,
 170 #endif
 171         .pr_drain =             sctp_drain,
 172         .pr_usrreqs =           &sctp_usrreqs
 173 },
 174 {
 175         .pr_type =              SOCK_STREAM,
 176         .pr_domain =            &inetdomain,
 177         .pr_protocol =          IPPROTO_SCTP,
 178         .pr_flags =             PR_WANTRCVD,
 179         .pr_input =             sctp_input,
 180         .pr_ctlinput =          sctp_ctlinput,
 181         .pr_ctloutput =         sctp_ctloutput,
 182         .pr_drain =             sctp_drain,
 183         .pr_usrreqs =           &sctp_usrreqs
 184 },
 185 #endif /* SCTP */
 186 {
 187         .pr_type =              SOCK_RAW,
 188         .pr_domain =            &inetdomain,
 189         .pr_protocol =          IPPROTO_RAW,
 190         .pr_flags =             PR_ATOMIC|PR_ADDR,
 191         .pr_input =             rip_input,
 192         .pr_ctlinput =          rip_ctlinput,
 193         .pr_ctloutput =         rip_ctloutput,
 194         .pr_usrreqs =           &rip_usrreqs
 195 },
 196 {
 197         .pr_type =              SOCK_RAW,
 198         .pr_domain =            &inetdomain,
 199         .pr_protocol =          IPPROTO_ICMP,
 200         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 201         .pr_input =             icmp_input,
 202         .pr_ctloutput =         rip_ctloutput,
 203         .pr_usrreqs =           &rip_usrreqs
 204 },
 205 {
 206         .pr_type =              SOCK_RAW,
 207         .pr_domain =            &inetdomain,
 208         .pr_protocol =          IPPROTO_IGMP,
 209         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 210         .pr_input =             igmp_input,
 211         .pr_ctloutput =         rip_ctloutput,
 212         .pr_fasttimo =          igmp_fasttimo,
 213         .pr_slowtimo =          igmp_slowtimo,
 214         .pr_usrreqs =           &rip_usrreqs
 215 },
 216 {
 217         .pr_type =              SOCK_RAW,
 218         .pr_domain =            &inetdomain,
 219         .pr_protocol =          IPPROTO_RSVP,
 220         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 221         .pr_input =             rsvp_input,
 222         .pr_ctloutput =         rip_ctloutput,
 223         .pr_usrreqs =           &rip_usrreqs
 224 },
 225 #ifdef IPSEC
 226 {
 227         .pr_type =              SOCK_RAW,
 228         .pr_domain =            &inetdomain,
 229         .pr_protocol =          IPPROTO_AH,
 230         .pr_flags =             PR_ATOMIC|PR_ADDR,
 231         .pr_input =             ah4_input,
 232         .pr_ctlinput =          ah4_ctlinput,
 233         .pr_usrreqs =           &nousrreqs
 234 },
 235 {
 236         .pr_type =              SOCK_RAW,
 237         .pr_domain =            &inetdomain,
 238         .pr_protocol =          IPPROTO_ESP,
 239         .pr_flags =             PR_ATOMIC|PR_ADDR,
 240         .pr_input =             esp4_input,
 241         .pr_ctlinput =          esp4_ctlinput,
 242         .pr_usrreqs =           &nousrreqs
 243 },
 244 {
 245         .pr_type =              SOCK_RAW,
 246         .pr_domain =            &inetdomain,
 247         .pr_protocol =          IPPROTO_IPCOMP,
 248         .pr_flags =             PR_ATOMIC|PR_ADDR,
 249         .pr_input =             ipcomp4_input,
 250         .pr_usrreqs =           &nousrreqs
 251 },
 252 #endif /* IPSEC */
 253 {
 254         .pr_type =              SOCK_RAW,
 255         .pr_domain =            &inetdomain,
 256         .pr_protocol =          IPPROTO_IPV4,
 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_MOBILE,
 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_ETHERIP,
 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 {
 284         .pr_type =              SOCK_RAW,
 285         .pr_domain =            &inetdomain,
 286         .pr_protocol =          IPPROTO_GRE,
 287         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 288         .pr_input =             encap4_input,
 289         .pr_ctloutput =         rip_ctloutput,
 290         .pr_init =              encap_init,
 291         .pr_usrreqs =           &rip_usrreqs
 292 },
 293 # ifdef INET6
 294 {
 295         .pr_type =              SOCK_RAW,
 296         .pr_domain =            &inetdomain,
 297         .pr_protocol =          IPPROTO_IPV6,
 298         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 299         .pr_input =             encap4_input,
 300         .pr_ctloutput =         rip_ctloutput,
 301         .pr_init =              encap_init,
 302         .pr_usrreqs =           &rip_usrreqs
 303 },
 304 #endif
 305 {
 306         .pr_type =              SOCK_RAW,
 307         .pr_domain =            &inetdomain,
 308         .pr_protocol =          IPPROTO_PIM,
 309         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 310         .pr_input =             encap4_input,
 311         .pr_ctloutput =         rip_ctloutput,
 312         .pr_usrreqs =           &rip_usrreqs
 313 },
 314 /* Spacer n-times for loadable protocols. */
 315 IPPROTOSPACER,
 316 IPPROTOSPACER,
 317 IPPROTOSPACER,
 318 IPPROTOSPACER,
 319 IPPROTOSPACER,
 320 IPPROTOSPACER,
 321 IPPROTOSPACER,
 322 IPPROTOSPACER,
 323 /* raw wildcard */
 324 {
 325         .pr_type =              SOCK_RAW,
 326         .pr_domain =            &inetdomain,
 327         .pr_flags =             PR_ATOMIC|PR_ADDR,
 328         .pr_input =             rip_input,
 329         .pr_ctloutput =         rip_ctloutput,
 330         .pr_init =              rip_init,
 331 #ifdef VIMAGE
 332         .pr_destroy =           rip_destroy,
 333 #endif
 334         .pr_usrreqs =           &rip_usrreqs
 335 },
 336 };
 337
 338 extern int in_inithead(void **, int);
 339 extern int in_detachhead(void **, int);
 340
 341 struct domain inetdomain = {
 342         .dom_family =           AF_INET,
 343         .dom_name =             "internet",
 344         .dom_protosw =          inetsw,
 345         .dom_protoswNPROTOSW =  &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 346 #ifdef RADIX_MPATH
 347         .dom_rtattach =         rn4_mpath_inithead,
 348 #else
 349         .dom_rtattach =         in_inithead,
 350 #endif
 351 #ifdef VIMAGE
 352         .dom_rtdetach =         in_detachhead,
 353 #endif
 354         .dom_rtoffset =         32,
 355         .dom_maxrtkey =         sizeof(struct sockaddr_in),
 356         .dom_ifattach =         in_domifattach,
 357         .dom_ifdetach =         in_domifdetach
 358 };
 359
 360 VNET_DOMAIN_SET(inet);
 361 #endif /* INET */
 362
 363 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 364         "Internet Family");
 365
 366 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 367 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 368 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 369 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 370 #ifdef SCTP
 371 SYSCTL_NODE(_net_inet, IPPROTO_SCTP,    sctp,   CTLFLAG_RW, 0,  "SCTP");
 372 #endif
 373 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 374 #ifdef IPSEC
 375 /* XXX no protocol # to use, pick something "reserved" */
 376 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 377 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 378 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 379 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 380 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 381 #endif /* IPSEC */
 382 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");