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. 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  * $FreeBSD: src/sys/netinet/in_proto.c,v 1.53.2.7 2003/08/24 08:24:38 hsu Exp $
  31  */
  32
  33 #include "opt_ipdivert.h"
  34 #include "opt_mrouting.h"
  35 #include "opt_inet6.h"
  36 #include "opt_carp.h"
  37
  38 #include <sys/param.h>
  39 #include <sys/kernel.h>
  40 #include <sys/socket.h>
  41 #include <sys/domain.h>
  42 #include <sys/protosw.h>
  43 #include <sys/queue.h>
  44 #include <sys/sysctl.h>
  45
  46 #include <net/if.h>
  47 #include <net/route.h>
  48
  49 #include <netinet/in.h>
  50 #include <netinet/in_systm.h>
  51 #include <netinet/in_pcb.h>
  52 #include <netinet/ip.h>
  53 #include <netinet/ip_var.h>
  54 #include <netinet/ip_icmp.h>
  55 #include <netinet/igmp_var.h>
  56 #ifdef PIM
  57 #include <netinet/pim_var.h>
  58 #endif
  59 #include <netinet/tcp.h>
  60 #include <netinet/tcp_timer.h>
  61 #include <netinet/tcp_var.h>
  62 #include <netinet/udp.h>
  63 #include <netinet/udp_var.h>
  64 #include <netinet/ip_encap.h>
  65 #ifdef IPDIVERT
  66 #include <netinet/ip_divert.h>
  67 #endif
  68
  69 /*
  70  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  71  */
  72
  73 #include <net/netisr.h>         /* for cpu0_soport */
  74
  75 #ifdef CARP
  76 #include <netinet/ip_carp.h>
  77 #endif
  78
  79 extern  struct domain inetdomain;
  80 static  struct pr_usrreqs nousrreqs;
  81
  82 struct protosw inetsw[] = {
  83     {
  84         .pr_type = 0,
  85         .pr_domain = &inetdomain,
  86         .pr_protocol = 0,
  87         .pr_flags = 0,
  88
  89         .pr_ctlport = NULL,
  90
  91         .pr_init = ip_init,
  92         .pr_drain = ip_drain,
  93         .pr_usrreqs = &nousrreqs
  94     },
  95     {
  96         .pr_type = SOCK_DGRAM,
  97         .pr_domain = &inetdomain,
  98         .pr_protocol = IPPROTO_UDP,
  99         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE|
 100             PR_ASYNC_SEND|PR_ASEND_HOLDTD|PR_ACONN_HOLDTD,
 101
 102         .pr_initport = udp_initport,
 103         .pr_input = udp_input,
 104         .pr_output = NULL,
 105         .pr_ctlinput = udp_ctlinput,
 106         .pr_ctloutput = udp_ctloutput,
 107
 108         .pr_ctlport = udp_ctlport,
 109         .pr_init = udp_init,
 110         .pr_usrreqs = &udp_usrreqs
 111     },
 112     {
 113         .pr_type = SOCK_STREAM,
 114         .pr_domain = &inetdomain,
 115         .pr_protocol = IPPROTO_TCP,
 116         .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_MPSAFE|
 117             PR_ASYNC_SEND|PR_ASYNC_RCVD|PR_ACONN_HOLDTD,
 118
 119         .pr_initport = tcp_initport,
 120         .pr_input = tcp_input,
 121         .pr_output = NULL,
 122         .pr_ctlinput = tcp_ctlinput,
 123         .pr_ctloutmsg = tcp_ctloutmsg,
 124         .pr_ctloutput = tcp_ctloutput,
 125
 126         .pr_ctlport = tcp_ctlport,
 127         .pr_init = tcp_init,
 128         .pr_drain = tcp_drain,
 129         .pr_usrreqs = &tcp_usrreqs
 130     },
 131     {
 132         .pr_type = SOCK_RAW,
 133         .pr_domain = &inetdomain,
 134         .pr_protocol = IPPROTO_RAW,
 135         .pr_flags = PR_ATOMIC|PR_ADDR,
 136
 137         .pr_input = rip_input,
 138         .pr_output = NULL,
 139         .pr_ctlinput = rip_ctlinput,
 140         .pr_ctloutput = rip_ctloutput,
 141
 142         .pr_ctlport = cpu0_ctlport,
 143         .pr_usrreqs = &rip_usrreqs
 144     },
 145     {
 146         .pr_type = SOCK_RAW,
 147         .pr_domain = &inetdomain,
 148         .pr_protocol = IPPROTO_ICMP,
 149         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE,
 150
 151         .pr_input = icmp_input,
 152         .pr_output = NULL,
 153         .pr_ctlinput = NULL,
 154         .pr_ctloutput = rip_ctloutput,
 155
 156         .pr_usrreqs = &rip_usrreqs
 157     },
 158     {
 159         .pr_type = SOCK_RAW,
 160         .pr_domain = &inetdomain,
 161         .pr_protocol = IPPROTO_IGMP,
 162         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR|PR_MPSAFE,
 163
 164         .pr_input = igmp_input,
 165         .pr_output = NULL,
 166         .pr_ctlinput = NULL,
 167         .pr_ctloutput = rip_ctloutput,
 168
 169         .pr_init = igmp_init,
 170         .pr_drain = NULL,
 171         .pr_usrreqs = &rip_usrreqs
 172     },
 173     {
 174         .pr_type = SOCK_RAW,
 175         .pr_domain = &inetdomain,
 176         .pr_protocol = IPPROTO_RSVP,
 177         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 178
 179         .pr_input = rsvp_input,
 180         .pr_output = NULL,
 181         .pr_ctlinput = NULL,
 182         .pr_ctloutput = rip_ctloutput,
 183
 184         .pr_usrreqs = &rip_usrreqs
 185     },
 186     {
 187         .pr_type = SOCK_RAW,
 188         .pr_domain = &inetdomain,
 189         .pr_protocol = IPPROTO_IPV4,
 190         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 191         .pr_input = encap4_input,
 192         .pr_output = NULL,
 193         .pr_ctlinput = NULL,
 194         .pr_ctloutput = rip_ctloutput,
 195
 196         .pr_ctlport = NULL,
 197         .pr_init = encap_init,
 198         .pr_usrreqs = &rip_usrreqs
 199     },
 200     {
 201         .pr_type = SOCK_RAW,
 202         .pr_domain = &inetdomain,
 203         .pr_protocol = IPPROTO_MOBILE,
 204         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 205
 206         .pr_input = encap4_input,
 207         .pr_output = NULL,
 208         .pr_ctlinput = NULL,
 209         .pr_ctloutput = rip_ctloutput,
 210
 211         .pr_ctlport = NULL,
 212         .pr_init = encap_init,
 213         .pr_usrreqs = &rip_usrreqs
 214     },
 215     {
 216         .pr_type = SOCK_RAW,
 217         .pr_domain = &inetdomain,
 218         .pr_protocol = IPPROTO_GRE,
 219         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 220
 221         .pr_input = encap4_input,
 222         .pr_output = NULL,
 223         .pr_ctlinput = NULL,
 224         .pr_ctloutput = rip_ctloutput,
 225
 226         .pr_ctlport = NULL,
 227         .pr_init = encap_init,
 228         .pr_usrreqs = &rip_usrreqs
 229     },
 230 #ifdef INET6
 231     {
 232         .pr_type = SOCK_RAW,
 233         .pr_domain = &inetdomain,
 234         .pr_protocol = IPPROTO_IPV6,
 235         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 236
 237         .pr_input = encap4_input,
 238         .pr_output = NULL,
 239         .pr_ctlinput = NULL,
 240         .pr_ctloutput = rip_ctloutput,
 241
 242         .pr_ctlport = NULL,
 243         .pr_init = encap_init,
 244         .pr_usrreqs = &rip_usrreqs
 245     },
 246 #endif
 247 #ifdef IPDIVERT
 248     {
 249         .pr_type = SOCK_RAW,
 250         .pr_domain = &inetdomain,
 251         .pr_protocol = IPPROTO_DIVERT,
 252         .pr_flags = PR_ATOMIC|PR_ADDR,
 253
 254         .pr_input = div_input,
 255         .pr_output = NULL,
 256         .pr_ctlinput = NULL,
 257         .pr_ctloutput = ip_ctloutput,
 258
 259         .pr_ctlport = NULL,
 260         .pr_init = div_init,
 261         .pr_usrreqs = &div_usrreqs
 262     },
 263 #endif
 264 #ifdef PIM
 265     {
 266         .pr_type = SOCK_RAW,
 267         .pr_domain = &inetdomain,
 268         .pr_protocol = IPPROTO_PIM,
 269         .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 270
 271         .pr_input = pim_input,
 272         .pr_output = NULL,
 273         .pr_ctlinput = NULL,
 274         .pr_ctloutput = rip_ctloutput,
 275
 276         .pr_ctlport = NULL,
 277         .pr_usrreqs = &rip_usrreqs
 278     },
 279 #endif
 280 #ifdef NPFSYNC
 281     {
 282         .pr_type = SOCK_RAW,
 283         .pr_domain = &inetdomain,
 284         .pr_protocol = IPPROTO_PFSYNC,
 285         .pr_flags = PR_ATOMIC|PR_ADDR,
 286
 287         .pr_input = pfsync_input,
 288         .pr_output = NULL,
 289         .pr_ctlinput = NULL,
 290         .pr_ctloutput = rip_ctloutput,
 291
 292         .pr_ctlport = NULL,
 293         .pr_usrreqs = &rip_usrreqs
 294     },
 295 #endif  /* NPFSYNC */
 296     {
 297         /* raw wildcard */
 298         .pr_type = SOCK_RAW,
 299         .pr_domain = &inetdomain,
 300         .pr_protocol = 0,
 301         .pr_flags = PR_ATOMIC|PR_ADDR,
 302
 303         .pr_input = rip_input,
 304         .pr_output = NULL,
 305         .pr_ctlinput = NULL,
 306         .pr_ctloutput = rip_ctloutput,
 307
 308         .pr_init = rip_init,
 309         .pr_ctlport = NULL,
 310         .pr_usrreqs = &rip_usrreqs
 311     },
 312 #ifdef CARP
 313     {
 314         .pr_type = SOCK_RAW,
 315         .pr_domain = &inetdomain,
 316         .pr_protocol = IPPROTO_CARP,
 317         .pr_flags = PR_ATOMIC|PR_ADDR|PR_MPSAFE,
 318
 319         .pr_input = carp_proto_input,
 320         .pr_output = rip_output,
 321         .pr_ctlinput = carp_proto_ctlinput,
 322         .pr_ctloutput = rip_ctloutput,
 323
 324         .pr_ctlport = cpu0_ctlport,
 325         .pr_usrreqs = &rip_usrreqs
 326     },
 327 #endif
 328 };
 329
 330 static void
 331 inetdomain_init(void)
 332 {
 333         in_pcbglobalinit();
 334 }
 335
 336 struct domain inetdomain = {
 337         .dom_family             = AF_INET,
 338         .dom_name               = "internet",
 339         .dom_init               = inetdomain_init,
 340         .dom_externalize        = NULL,
 341         .dom_dispose            = NULL,
 342         .dom_protosw            = inetsw,
 343         .dom_protoswNPROTOSW    = &inetsw[NELEM(inetsw)],
 344         .dom_next               = SLIST_ENTRY_INITIALIZER,
 345         .dom_rtattach           = in_inithead,
 346         .dom_rtoffset           = 32,
 347         .dom_maxrtkey           = sizeof(struct sockaddr_in),
 348         .dom_ifattach           = NULL,
 349         .dom_ifdetach           = NULL
 350 };
 351
 352 DOMAIN_SET(inet);
 353
 354 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 355         "Internet Family");
 356
 357 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 358 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 359 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 360 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 361 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 362 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 363 #ifdef IPDIVERT
 364 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
 365 #endif
 366 #ifdef PIM
 367 SYSCTL_NODE(_net_inet, IPPROTO_PIM,    pim,    CTLFLAG_RW, 0,  "PIM");
 368 #endif
 369 #ifdef CARP
 370 SYSCTL_NODE(_net_inet, IPPROTO_CARP,    carp,    CTLFLAG_RW, 0,  "CARP");
 371 #endif