bsd/netinet/in_proto.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Copyright (c) 1982, 1986, 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
  63  */
  64
  65 #include <sys/param.h>
  66 #include <sys/kernel.h>
  67 #include <sys/socket.h>
  68 #include <sys/domain.h>
  69 #include <sys/protosw.h>
  70 #include <sys/queue.h>
  71 #include <sys/sysctl.h>
  72 #include <sys/mbuf.h>
  73
  74 #include <net/if.h>
  75 #include <net/route.h>
  76
  77 #include <netinet/in.h>
  78 #include <netinet/in_systm.h>
  79 #include <netinet/ip.h>
  80 #include <netinet/ip_var.h>
  81 #include <netinet/ip_icmp.h>
  82 #include <netinet/igmp_var.h>
  83 #include <netinet/tcp.h>
  84 #include <netinet/tcp_timer.h>
  85 #include <netinet/tcp_var.h>
  86 #include <netinet/tcpip.h>
  87 #include <netinet/udp.h>
  88 #include <netinet/udp_var.h>
  89 #include <netinet/ip_encap.h>
  90 #include <netinet/ip_divert.h>
  91
  92
  93 /*
  94  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  95  */
  96
  97 #if IPSEC
  98 #include <netinet6/ipsec.h>
  99 #include <netinet6/ah.h>
 100 #if IPSEC_ESP
 101 #include <netinet6/esp.h>
 102 #endif
 103 #include <netinet6/ipcomp.h>
 104 #endif /* IPSEC */
 105
 106 #if IPXIP
 107 #include <netipx/ipx_ip.h>
 108 #endif
 109
 110 extern  struct domain inetdomain;
 111 static  struct pr_usrreqs nousrreqs;
 112 extern struct   pr_usrreqs icmp_dgram_usrreqs;
 113 extern int icmp_dgram_ctloutput(struct socket *, struct sockopt *);
 114
 115
 116 struct protosw inetsw[] = {
 117 { 0,            &inetdomain,    0,              0,
 118   0,            0,              0,              0,
 119   0,
 120   ip_init,      0,              ip_slowtimo,    ip_drain,
 121   0,
 122   &nousrreqs,
 123   0,            0,              0,      { 0, 0 },       0,      { 0 }
 124 },
 125 { SOCK_DGRAM,   &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR|PR_PROTOLOCK|PR_PCBLOCK,
 126   udp_input,    0,              udp_ctlinput,   ip_ctloutput,
 127   0,
 128   udp_init,     0,              udp_slowtimo,           0,
 129   0,
 130   &udp_usrreqs,
 131   udp_lock,     udp_unlock,     udp_getlock,    { 0, 0 },       0,      { 0 }
 132 },
 133 { SOCK_STREAM,  &inetdomain,    IPPROTO_TCP,
 134         PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_PCBLOCK|PR_PROTOLOCK|PR_DISPOSE,
 135   tcp_input,    0,              tcp_ctlinput,   tcp_ctloutput,
 136   0,
 137   tcp_init,     tcp_fasttimo,   tcp_slowtimo,   tcp_drain,
 138   0,
 139   &tcp_usrreqs,
 140   tcp_lock,     tcp_unlock,     tcp_getlock,    { 0, 0 },       0,      { 0 }
 141 },
 142 { SOCK_RAW,     &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
 143   rip_input,    0,              rip_ctlinput,   rip_ctloutput,
 144   0,
 145   0,            0,              0,              0,
 146   0,
 147   &rip_usrreqs,
 148   0,            rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 149 },
 150 { SOCK_RAW,     &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 151   icmp_input,   0,              0,              rip_ctloutput,
 152   0,
 153   0,            0,              0,              0,
 154   0,
 155   &rip_usrreqs,
 156   0,            rip_unlock,     0,      { 0, 0 },       0,      { 0 }
 157 },
 158 { SOCK_DGRAM, &inetdomain,      IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 159   icmp_input,   0,              0,              icmp_dgram_ctloutput,
 160   0,
 161   0,            0,              0,              0,
 162   0,
 163   &icmp_dgram_usrreqs,
 164   0,            rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 165 },
 166 { SOCK_RAW,     &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 167   igmp_input,   0,              0,              rip_ctloutput,
 168   0,
 169   igmp_init,    igmp_fasttimo,  igmp_slowtimo,  0,
 170   0,
 171   &rip_usrreqs,
 172   0,            rip_unlock,     0,      { 0, 0 },       0,      { 0 }
 173 },
 174 { SOCK_RAW,     &inetdomain,    IPPROTO_RSVP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 175   rsvp_input,   0,              0,              rip_ctloutput,
 176   0,
 177   0,            0,              0,              0,
 178   0,
 179   &rip_usrreqs,
 180   0,            rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 181 },
 182 #if IPSEC
 183 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 184   ah4_input,    0,              0,              0,
 185   0,
 186   0,            0,              0,              0,
 187   0,
 188   &nousrreqs,
 189   0,            0,              0,      { 0, 0 },       0,      { 0 }
 190 },
 191 #if IPSEC_ESP
 192 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 193   esp4_input,   0,              0,              0,
 194   0,
 195   0,            0,              0,              0,
 196   0,
 197   &nousrreqs,
 198   0,            0,              0,      { 0, 0 },       0,      { 0 }
 199 },
 200 #endif
 201 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 202   ipcomp4_input, 0,             0,              0,
 203   0,
 204   0,            0,              0,              0,
 205   0,
 206   &nousrreqs,
 207   0,            0,              0,      { 0, 0 },       0,      { 0 }
 208 },
 209 #endif /* IPSEC */
 210 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 211   encap4_input, 0,              0,              rip_ctloutput,
 212   0,
 213   encap_init,           0,              0,              0,
 214   0,
 215   &rip_usrreqs,
 216   0,            0,              0,      { 0, 0 },       0,      { 0 }
 217 },
 218 # if INET6
 219 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 220   encap4_input, 0,              0,              rip_ctloutput,
 221   0,
 222   encap_init,   0,              0,              0,
 223   0,
 224   &rip_usrreqs,
 225   0,            0,              0,      { 0, 0 },       0,      { 0 }
 226 },
 227 #endif
 228 #if IPDIVERT
 229 { SOCK_RAW,     &inetdomain,    IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR|PR_PCBLOCK,
 230   div_input,    0,              0,              ip_ctloutput,
 231   0,
 232   div_init,     0,              0,              0,
 233   0,
 234   &div_usrreqs,
 235   div_lock,             div_unlock,             div_getlock,    { 0, 0 },       0,      { 0 }
 236 },
 237 #endif
 238 #if IPXIP
 239 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 240   ipxip_input,  0,              ipxip_ctlinput, 0,
 241   0,
 242   0,            0,              0,              0,
 243   0,
 244   &rip_usrreqs,
 245   0,            0,              0,      { 0, 0 },       0,      { 0 }
 246 },
 247 #endif
 248 #if NSIP
 249 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 250   idpip_input,  0,              nsip_ctlinput,  0,
 251   0,
 252   0,            0,              0,              0,
 253   0,
 254   &rip_usrreqs,
 255   0,            0,              0,      { 0, 0 },       0,      { 0 }
 256 },
 257 #endif
 258         /* raw wildcard */
 259 { SOCK_RAW,     &inetdomain,    0,              PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 260   rip_input,    0,              0,              rip_ctloutput,
 261   0,
 262   rip_init,     0,              0,              0,
 263   0,
 264   &rip_usrreqs,
 265   0,                    rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 266 },
 267 };
 268
 269 extern int in_inithead(void **, int);
 270
 271 int in_proto_count = (sizeof (inetsw) / sizeof (struct protosw));
 272
 273 extern void in_dinit(void);
 274 /* A routing init function, and a header size */
 275 struct domain inetdomain =
 276     { AF_INET,
 277       "internet",
 278       in_dinit,
 279       0,
 280       0,
 281       inetsw,
 282       0,
 283       in_inithead,
 284       32,
 285       sizeof(struct sockaddr_in),
 286       sizeof(struct tcpiphdr),
 287       0,
 288       0,
 289       0,
 290       { 0, 0}
 291     };
 292
 293 DOMAIN_SET(inet);
 294
 295 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 296         "Internet Family");
 297
 298 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 299 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 300 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 301 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 302 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 303 #if IPSEC
 304 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 305 #endif /* IPSEC */
 306 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 307 #if IPDIVERT
 308 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  div,    CTLFLAG_RW, 0,  "DIVERT");
 309 #endif
 310