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