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_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 #include <net/if.h>
  54 #include <net/route.h>
  55 #ifdef RADIX_MPATH
  56 #include <net/radix_mpath.h>
  57 #endif
  58 #include <net/vnet.h>
  59
  60 #include <netinet/in.h>
  61 #include <netinet/in_systm.h>
  62 #include <netinet/in_var.h>
  63 #include <netinet/ip.h>
  64 #include <netinet/ip_var.h>
  65 #include <netinet/ip_icmp.h>
  66 #include <netinet/igmp_var.h>
  67 #include <netinet/tcp.h>
  68 #include <netinet/tcp_timer.h>
  69 #include <netinet/tcp_var.h>
  70 #include <netinet/udp.h>
  71 #include <netinet/udp_var.h>
  72 #include <netinet/ip_encap.h>
  73
  74 /*
  75  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  76  */
  77
  78 static struct pr_usrreqs nousrreqs;
  79
  80 #ifdef IPSEC
  81 #include <netipsec/ipsec.h>
  82 #endif /* IPSEC */
  83
  84 #ifdef SCTP
  85 #include <netinet/in_pcb.h>
  86 #include <netinet/sctp_pcb.h>
  87 #include <netinet/sctp.h>
  88 #include <netinet/sctp_var.h>
  89 #endif /* SCTP */
  90
  91 #ifdef DEV_PFSYNC
  92 #include <net/pfvar.h>
  93 #include <net/if_pfsync.h>
  94 #endif
  95
  96 FEATURE(inet, "Internet Protocol version 4");
  97
  98 extern  struct domain inetdomain;
  99
 100 /* Spacer for loadable protocols. */
 101 #define IPPROTOSPACER                           \
 102 {                                               \
 103         .pr_domain =            &inetdomain,    \
 104         .pr_protocol =          PROTO_SPACER,   \
 105         .pr_usrreqs =           &nousrreqs      \
 106 }
 107
 108 struct protosw inetsw[] = {
 109 {
 110         .pr_type =              0,
 111         .pr_domain =            &inetdomain,
 112         .pr_protocol =          IPPROTO_IP,
 113         .pr_init =              ip_init,
 114 #ifdef VIMAGE
 115         .pr_destroy =           ip_destroy,
 116 #endif
 117         .pr_slowtimo =          ip_slowtimo,
 118         .pr_drain =             ip_drain,
 119         .pr_usrreqs =           &nousrreqs
 120 },
 121 {
 122         .pr_type =              SOCK_DGRAM,
 123         .pr_domain =            &inetdomain,
 124         .pr_protocol =          IPPROTO_UDP,
 125         .pr_flags =             PR_ATOMIC|PR_ADDR,
 126         .pr_input =             udp_input,
 127         .pr_ctlinput =          udp_ctlinput,
 128         .pr_ctloutput =         udp_ctloutput,
 129         .pr_init =              udp_init,
 130 #ifdef VIMAGE
 131         .pr_destroy =           udp_destroy,
 132 #endif
 133         .pr_usrreqs =           &udp_usrreqs
 134 },
 135 {
 136         .pr_type =              SOCK_STREAM,
 137         .pr_domain =            &inetdomain,
 138         .pr_protocol =          IPPROTO_TCP,
 139         .pr_flags =             PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 140         .pr_input =             tcp_input,
 141         .pr_ctlinput =          tcp_ctlinput,
 142         .pr_ctloutput =         tcp_ctloutput,
 143         .pr_init =              tcp_init,
 144 #ifdef VIMAGE
 145         .pr_destroy =           tcp_destroy,
 146 #endif
 147         .pr_slowtimo =          tcp_slowtimo,
 148         .pr_drain =             tcp_drain,
 149         .pr_usrreqs =           &tcp_usrreqs
 150 },
 151 #ifdef SCTP
 152 {
 153         .pr_type =              SOCK_SEQPACKET,
 154         .pr_domain =            &inetdomain,
 155         .pr_protocol =          IPPROTO_SCTP,
 156         .pr_flags =             PR_WANTRCVD,
 157         .pr_input =             sctp_input,
 158         .pr_ctlinput =          sctp_ctlinput,
 159         .pr_ctloutput =         sctp_ctloutput,
 160         .pr_init =              sctp_init,
 161 #ifdef VIMAGE
 162         .pr_destroy =           sctp_finish,
 163 #endif
 164         .pr_drain =             sctp_drain,
 165         .pr_usrreqs =           &sctp_usrreqs
 166 },
 167 {
 168         .pr_type =              SOCK_STREAM,
 169         .pr_domain =            &inetdomain,
 170         .pr_protocol =          IPPROTO_SCTP,
 171         .pr_flags =             PR_WANTRCVD,
 172         .pr_input =             sctp_input,
 173         .pr_ctlinput =          sctp_ctlinput,
 174         .pr_ctloutput =         sctp_ctloutput,
 175         .pr_drain =             sctp_drain,
 176         .pr_usrreqs =           &sctp_usrreqs
 177 },
 178 #endif /* SCTP */
 179 {
 180         .pr_type =              SOCK_RAW,
 181         .pr_domain =            &inetdomain,
 182         .pr_protocol =          IPPROTO_RAW,
 183         .pr_flags =             PR_ATOMIC|PR_ADDR,
 184         .pr_input =             rip_input,
 185         .pr_ctlinput =          rip_ctlinput,
 186         .pr_ctloutput =         rip_ctloutput,
 187         .pr_usrreqs =           &rip_usrreqs
 188 },
 189 {
 190         .pr_type =              SOCK_RAW,
 191         .pr_domain =            &inetdomain,
 192         .pr_protocol =          IPPROTO_ICMP,
 193         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 194         .pr_input =             icmp_input,
 195         .pr_ctloutput =         rip_ctloutput,
 196         .pr_usrreqs =           &rip_usrreqs
 197 },
 198 {
 199         .pr_type =              SOCK_RAW,
 200         .pr_domain =            &inetdomain,
 201         .pr_protocol =          IPPROTO_IGMP,
 202         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 203         .pr_input =             igmp_input,
 204         .pr_ctloutput =         rip_ctloutput,
 205         .pr_fasttimo =          igmp_fasttimo,
 206         .pr_slowtimo =          igmp_slowtimo,
 207         .pr_usrreqs =           &rip_usrreqs
 208 },
 209 {
 210         .pr_type =              SOCK_RAW,
 211         .pr_domain =            &inetdomain,
 212         .pr_protocol =          IPPROTO_RSVP,
 213         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 214         .pr_input =             rsvp_input,
 215         .pr_ctloutput =         rip_ctloutput,
 216         .pr_usrreqs =           &rip_usrreqs
 217 },
 218 #ifdef IPSEC
 219 {
 220         .pr_type =              SOCK_RAW,
 221         .pr_domain =            &inetdomain,
 222         .pr_protocol =          IPPROTO_AH,
 223         .pr_flags =             PR_ATOMIC|PR_ADDR,
 224         .pr_input =             ah4_input,
 225         .pr_ctlinput =          ah4_ctlinput,
 226         .pr_usrreqs =           &nousrreqs
 227 },
 228 {
 229         .pr_type =              SOCK_RAW,
 230         .pr_domain =            &inetdomain,
 231         .pr_protocol =          IPPROTO_ESP,
 232         .pr_flags =             PR_ATOMIC|PR_ADDR,
 233         .pr_input =             esp4_input,
 234         .pr_ctlinput =          esp4_ctlinput,
 235         .pr_usrreqs =           &nousrreqs
 236 },
 237 {
 238         .pr_type =              SOCK_RAW,
 239         .pr_domain =            &inetdomain,
 240         .pr_protocol =          IPPROTO_IPCOMP,
 241         .pr_flags =             PR_ATOMIC|PR_ADDR,
 242         .pr_input =             ipcomp4_input,
 243         .pr_usrreqs =           &nousrreqs
 244 },
 245 #endif /* IPSEC */
 246 {
 247         .pr_type =              SOCK_RAW,
 248         .pr_domain =            &inetdomain,
 249         .pr_protocol =          IPPROTO_IPV4,
 250         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 251         .pr_input =             encap4_input,
 252         .pr_ctloutput =         rip_ctloutput,
 253         .pr_init =              encap_init,
 254         .pr_usrreqs =           &rip_usrreqs
 255 },
 256 {
 257         .pr_type =              SOCK_RAW,
 258         .pr_domain =            &inetdomain,
 259         .pr_protocol =          IPPROTO_MOBILE,
 260         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 261         .pr_input =             encap4_input,
 262         .pr_ctloutput =         rip_ctloutput,
 263         .pr_init =              encap_init,
 264         .pr_usrreqs =           &rip_usrreqs
 265 },
 266 {
 267         .pr_type =              SOCK_RAW,
 268         .pr_domain =            &inetdomain,
 269         .pr_protocol =          IPPROTO_ETHERIP,
 270         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 271         .pr_input =             encap4_input,
 272         .pr_ctloutput =         rip_ctloutput,
 273         .pr_init =              encap_init,
 274         .pr_usrreqs =           &rip_usrreqs
 275 },
 276 {
 277         .pr_type =              SOCK_RAW,
 278         .pr_domain =            &inetdomain,
 279         .pr_protocol =          IPPROTO_GRE,
 280         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 281         .pr_input =             encap4_input,
 282         .pr_ctloutput =         rip_ctloutput,
 283         .pr_init =              encap_init,
 284         .pr_usrreqs =           &rip_usrreqs
 285 },
 286 # ifdef INET6
 287 {
 288         .pr_type =              SOCK_RAW,
 289         .pr_domain =            &inetdomain,
 290         .pr_protocol =          IPPROTO_IPV6,
 291         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 292         .pr_input =             encap4_input,
 293         .pr_ctloutput =         rip_ctloutput,
 294         .pr_init =              encap_init,
 295         .pr_usrreqs =           &rip_usrreqs
 296 },
 297 #endif
 298 {
 299         .pr_type =              SOCK_RAW,
 300         .pr_domain =            &inetdomain,
 301         .pr_protocol =          IPPROTO_PIM,
 302         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 303         .pr_input =             encap4_input,
 304         .pr_ctloutput =         rip_ctloutput,
 305         .pr_usrreqs =           &rip_usrreqs
 306 },
 307 #ifdef DEV_PFSYNC
 308 {
 309         .pr_type =              SOCK_RAW,
 310         .pr_domain =            &inetdomain,
 311         .pr_protocol =          IPPROTO_PFSYNC,
 312         .pr_flags =             PR_ATOMIC|PR_ADDR,
 313         .pr_input =             pfsync_input,
 314         .pr_ctloutput =         rip_ctloutput,
 315         .pr_usrreqs =           &rip_usrreqs
 316 },
 317 #endif  /* DEV_PFSYNC */
 318 /* Spacer n-times for loadable protocols. */
 319 IPPROTOSPACER,
 320 IPPROTOSPACER,
 321 IPPROTOSPACER,
 322 IPPROTOSPACER,
 323 IPPROTOSPACER,
 324 IPPROTOSPACER,
 325 IPPROTOSPACER,
 326 IPPROTOSPACER,
 327 /* raw wildcard */
 328 {
 329         .pr_type =              SOCK_RAW,
 330         .pr_domain =            &inetdomain,
 331         .pr_flags =             PR_ATOMIC|PR_ADDR,
 332         .pr_input =             rip_input,
 333         .pr_ctloutput =         rip_ctloutput,
 334         .pr_init =              rip_init,
 335 #ifdef VIMAGE
 336         .pr_destroy =           rip_destroy,
 337 #endif
 338         .pr_usrreqs =           &rip_usrreqs
 339 },
 340 };
 341
 342 extern int in_inithead(void **, int);
 343 extern int in_detachhead(void **, int);
 344
 345 struct domain inetdomain = {
 346         .dom_family =           AF_INET,
 347         .dom_name =             "internet",
 348         .dom_protosw =          inetsw,
 349         .dom_protoswNPROTOSW =  &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
 350 #ifdef RADIX_MPATH
 351         .dom_rtattach =         rn4_mpath_inithead,
 352 #else
 353         .dom_rtattach =         in_inithead,
 354 #endif
 355 #ifdef VIMAGE
 356         .dom_rtdetach =         in_detachhead,
 357 #endif
 358         .dom_rtoffset =         32,
 359         .dom_maxrtkey =         sizeof(struct sockaddr_in),
 360         .dom_ifattach =         in_domifattach,
 361         .dom_ifdetach =         in_domifdetach
 362 };
 363
 364 VNET_DOMAIN_SET(inet);
 365
 366 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 367         "Internet Family");
 368
 369 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 370 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 371 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 372 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 373 #ifdef SCTP
 374 SYSCTL_NODE(_net_inet, IPPROTO_SCTP,    sctp,   CTLFLAG_RW, 0,  "SCTP");
 375 #endif
 376 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 377 #ifdef IPSEC
 378 /* XXX no protocol # to use, pick something "reserved" */
 379 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 380 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
 381 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
 382 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
 383 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
 384 #endif /* IPSEC */
 385 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 386 #ifdef DEV_PFSYNC
 387 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC,  pfsync, CTLFLAG_RW, 0,  "PFSYNC");
 388 #endif