bsd/netinet/in_proto.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1982, 1986, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
  61  */
  62
  63 #include <sys/param.h>
  64 #include <sys/kernel.h>
  65 #include <sys/socket.h>
  66 #include <sys/domain.h>
  67 #include <sys/protosw.h>
  68 #include <sys/queue.h>
  69 #include <sys/sysctl.h>
  70 #include <sys/mbuf.h>
  71
  72 #include <net/if.h>
  73 #include <net/route.h>
  74
  75 #include <netinet/in.h>
  76 #include <netinet/in_systm.h>
  77 #include <netinet/ip.h>
  78 #include <netinet/ip_var.h>
  79 #include <netinet/ip_icmp.h>
  80 #include <netinet/igmp_var.h>
  81 #include <netinet/tcp.h>
  82 #include <netinet/tcp_timer.h>
  83 #include <netinet/tcp_var.h>
  84 #include <netinet/tcpip.h>
  85 #include <netinet/udp.h>
  86 #include <netinet/udp_var.h>
  87 #include <netinet/ip_encap.h>
  88 #include <netinet/ip_divert.h>
  89
  90
  91 /*
  92  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  93  */
  94
  95 #if IPSEC
  96 #include <netinet6/ipsec.h>
  97 #include <netinet6/ah.h>
  98 #if IPSEC_ESP
  99 #include <netinet6/esp.h>
 100 #endif
 101 #include <netinet6/ipcomp.h>
 102 #endif /* IPSEC */
 103
 104 #if IPXIP
 105 #include <netipx/ipx_ip.h>
 106 #endif
 107
 108 extern  struct domain inetdomain;
 109 static  struct pr_usrreqs nousrreqs;
 110 extern struct   pr_usrreqs icmp_dgram_usrreqs;
 111 extern int icmp_dgram_ctloutput(struct socket *, struct sockopt *);
 112
 113
 114 struct protosw inetsw[] = {
 115 { 0,            &inetdomain,    0,              0,
 116   0,            0,              0,              0,
 117   0,
 118   ip_init,      0,              ip_slowtimo,    ip_drain,
 119   0,
 120   &nousrreqs,
 121   0,            0,              0,      { 0, 0 },       0,      { 0 }
 122 },
 123 { SOCK_DGRAM,   &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR|PR_PROTOLOCK|PR_PCBLOCK,
 124   udp_input,    0,              udp_ctlinput,   ip_ctloutput,
 125   0,
 126   udp_init,     0,              udp_slowtimo,           0,
 127   0,
 128   &udp_usrreqs,
 129   udp_lock,     udp_unlock,     udp_getlock,    { 0, 0 },       0,      { 0 }
 130 },
 131 { SOCK_STREAM,  &inetdomain,    IPPROTO_TCP,
 132         PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_PCBLOCK|PR_PROTOLOCK|PR_DISPOSE,
 133   tcp_input,    0,              tcp_ctlinput,   tcp_ctloutput,
 134   0,
 135   tcp_init,     tcp_fasttimo,   tcp_slowtimo,   tcp_drain,
 136   0,
 137   &tcp_usrreqs,
 138   tcp_lock,     tcp_unlock,     tcp_getlock,    { 0, 0 },       0,      { 0 }
 139 },
 140 { SOCK_RAW,     &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
 141   rip_input,    0,              rip_ctlinput,   rip_ctloutput,
 142   0,
 143   0,            0,              0,              0,
 144   0,
 145   &rip_usrreqs,
 146   0,            rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 147 },
 148 { SOCK_RAW,     &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 149   icmp_input,   0,              0,              rip_ctloutput,
 150   0,
 151   0,            0,              0,              0,
 152   0,
 153   &rip_usrreqs,
 154   0,            rip_unlock,     0,      { 0, 0 },       0,      { 0 }
 155 },
 156 { SOCK_DGRAM, &inetdomain,      IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 157   icmp_input,   0,              0,              icmp_dgram_ctloutput,
 158   0,
 159   0,            0,              0,              0,
 160   0,
 161   &icmp_dgram_usrreqs,
 162   0,            rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 163 },
 164 { SOCK_RAW,     &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 165   igmp_input,   0,              0,              rip_ctloutput,
 166   0,
 167   igmp_init,    igmp_fasttimo,  igmp_slowtimo,  0,
 168   0,
 169   &rip_usrreqs,
 170   0,            rip_unlock,     0,      { 0, 0 },       0,      { 0 }
 171 },
 172 { SOCK_RAW,     &inetdomain,    IPPROTO_RSVP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 173   rsvp_input,   0,              0,              rip_ctloutput,
 174   0,
 175   0,            0,              0,              0,
 176   0,
 177   &rip_usrreqs,
 178   0,            rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 179 },
 180 #if IPSEC
 181 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 182   ah4_input,    0,              0,              0,
 183   0,
 184   0,            0,              0,              0,
 185   0,
 186   &nousrreqs,
 187   0,            0,              0,      { 0, 0 },       0,      { 0 }
 188 },
 189 #if IPSEC_ESP
 190 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 191   esp4_input,   0,              0,              0,
 192   0,
 193   0,            0,              0,              0,
 194   0,
 195   &nousrreqs,
 196   0,            0,              0,      { 0, 0 },       0,      { 0 }
 197 },
 198 #endif
 199 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 200   ipcomp4_input, 0,             0,              0,
 201   0,
 202   0,            0,              0,              0,
 203   0,
 204   &nousrreqs,
 205   0,            0,              0,      { 0, 0 },       0,      { 0 }
 206 },
 207 #endif /* IPSEC */
 208 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 209   encap4_input, 0,              0,              rip_ctloutput,
 210   0,
 211   encap_init,           0,              0,              0,
 212   0,
 213   &rip_usrreqs,
 214   0,            0,              0,      { 0, 0 },       0,      { 0 }
 215 },
 216 # if INET6
 217 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 218   encap4_input, 0,              0,              rip_ctloutput,
 219   0,
 220   encap_init,   0,              0,              0,
 221   0,
 222   &rip_usrreqs,
 223   0,            0,              0,      { 0, 0 },       0,      { 0 }
 224 },
 225 #endif
 226 #if IPDIVERT
 227 { SOCK_RAW,     &inetdomain,    IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR|PR_PCBLOCK,
 228   div_input,    0,              0,              ip_ctloutput,
 229   0,
 230   div_init,     0,              0,              0,
 231   0,
 232   &div_usrreqs,
 233   div_lock,             div_unlock,             div_getlock,    { 0, 0 },       0,      { 0 }
 234 },
 235 #endif
 236 #if IPXIP
 237 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 238   ipxip_input,  0,              ipxip_ctlinput, 0,
 239   0,
 240   0,            0,              0,              0,
 241   0,
 242   &rip_usrreqs,
 243   0,            0,              0,      { 0, 0 },       0,      { 0 }
 244 },
 245 #endif
 246 #if NSIP
 247 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 248   idpip_input,  0,              nsip_ctlinput,  0,
 249   0,
 250   0,            0,              0,              0,
 251   0,
 252   &rip_usrreqs,
 253   0,            0,              0,      { 0, 0 },       0,      { 0 }
 254 },
 255 #endif
 256         /* raw wildcard */
 257 { SOCK_RAW,     &inetdomain,    0,              PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 258   rip_input,    0,              0,              rip_ctloutput,
 259   0,
 260   rip_init,     0,              0,              0,
 261   0,
 262   &rip_usrreqs,
 263   0,                    rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 264 },
 265 };
 266
 267 extern int in_inithead(void **, int);
 268
 269 int in_proto_count = (sizeof (inetsw) / sizeof (struct protosw));
 270
 271 extern void in_dinit(void);
 272 /* A routing init function, and a header size */
 273 struct domain inetdomain =
 274     { AF_INET,
 275       "internet",
 276       in_dinit,
 277       0,
 278       0,
 279       inetsw,
 280       0,
 281       in_inithead,
 282       32,
 283       sizeof(struct sockaddr_in),
 284       sizeof(struct tcpiphdr),
 285       0,
 286       0,
 287       0,
 288       { 0, 0}
 289     };
 290
 291 DOMAIN_SET(inet);
 292
 293 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 294         "Internet Family");
 295
 296 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 297 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 298 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 299 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 300 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 301 #if IPSEC
 302 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 303 #endif /* IPSEC */
 304 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 305 #if IPDIVERT
 306 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  div,    CTLFLAG_RW, 0,  "DIVERT");
 307 #endif
 308