bsd/netinet/in_proto.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1982, 1986, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
  55  */
  56
  57 #include <sys/param.h>
  58 #include <sys/kernel.h>
  59 #include <sys/socket.h>
  60 #include <sys/domain.h>
  61 #include <sys/protosw.h>
  62 #include <sys/queue.h>
  63 #include <sys/sysctl.h>
  64 #include <sys/mbuf.h>
  65
  66 #include <net/if.h>
  67 #include <net/route.h>
  68
  69 #include <netinet/in.h>
  70 #include <netinet/in_systm.h>
  71 #include <netinet/ip.h>
  72 #include <netinet/ip_var.h>
  73 #include <netinet/ip_icmp.h>
  74 #include <netinet/igmp_var.h>
  75 #include <netinet/tcp.h>
  76 #include <netinet/tcp_timer.h>
  77 #include <netinet/tcp_var.h>
  78 #include <netinet/tcpip.h>
  79 #include <netinet/udp.h>
  80 #include <netinet/udp_var.h>
  81 #include <netinet/ip_encap.h>
  82 #include <netinet/ip_divert.h>
  83
  84
  85 /*
  86  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
  87  */
  88
  89 #if IPSEC
  90 #include <netinet6/ipsec.h>
  91 #include <netinet6/ah.h>
  92 #if IPSEC_ESP
  93 #include <netinet6/esp.h>
  94 #endif
  95 #include <netinet6/ipcomp.h>
  96 #endif /* IPSEC */
  97
  98 #if IPXIP
  99 #include <netipx/ipx_ip.h>
 100 #endif
 101
 102 extern  struct domain inetdomain;
 103 static  struct pr_usrreqs nousrreqs;
 104 extern struct   pr_usrreqs icmp_dgram_usrreqs;
 105 extern int icmp_dgram_ctloutput(struct socket *, struct sockopt *);
 106
 107
 108 struct protosw inetsw[] = {
 109 { 0,            &inetdomain,    0,              0,
 110   0,            0,              0,              0,
 111   0,
 112   ip_init,      0,              ip_slowtimo,    ip_drain,
 113   0,
 114   &nousrreqs,
 115   0,            0,              0,      { 0, 0 },       0,      { 0 }
 116 },
 117 { SOCK_DGRAM,   &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR|PR_PROTOLOCK|PR_PCBLOCK,
 118   udp_input,    0,              udp_ctlinput,   ip_ctloutput,
 119   0,
 120   udp_init,     0,              udp_slowtimo,           0,
 121   0,
 122   &udp_usrreqs,
 123   udp_lock,     udp_unlock,     udp_getlock,    { 0, 0 },       0,      { 0 }
 124 },
 125 { SOCK_STREAM,  &inetdomain,    IPPROTO_TCP,
 126         PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD|PR_PCBLOCK|PR_PROTOLOCK|PR_DISPOSE,
 127   tcp_input,    0,              tcp_ctlinput,   tcp_ctloutput,
 128   0,
 129   tcp_init,     tcp_fasttimo,   tcp_slowtimo,   tcp_drain,
 130   0,
 131   &tcp_usrreqs,
 132   tcp_lock,     tcp_unlock,     tcp_getlock,    { 0, 0 },       0,      { 0 }
 133 },
 134 { SOCK_RAW,     &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
 135   rip_input,    0,              rip_ctlinput,   rip_ctloutput,
 136   0,
 137   0,            0,              0,              0,
 138   0,
 139   &rip_usrreqs,
 140   0,            rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 141 },
 142 { SOCK_RAW,     &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 143   icmp_input,   0,              0,              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_DGRAM, &inetdomain,      IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 151   icmp_input,   0,              0,              icmp_dgram_ctloutput,
 152   0,
 153   0,            0,              0,              0,
 154   0,
 155   &icmp_dgram_usrreqs,
 156   0,            rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 157 },
 158 { SOCK_RAW,     &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 159   igmp_input,   0,              0,              rip_ctloutput,
 160   0,
 161   igmp_init,    igmp_fasttimo,  igmp_slowtimo,  0,
 162   0,
 163   &rip_usrreqs,
 164   0,            rip_unlock,     0,      { 0, 0 },       0,      { 0 }
 165 },
 166 { SOCK_RAW,     &inetdomain,    IPPROTO_RSVP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 167   rsvp_input,   0,              0,              rip_ctloutput,
 168   0,
 169   0,            0,              0,              0,
 170   0,
 171   &rip_usrreqs,
 172   0,            rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 173 },
 174 #if IPSEC
 175 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 176   ah4_input,    0,              0,              0,
 177   0,
 178   0,            0,              0,              0,
 179   0,
 180   &nousrreqs,
 181   0,            0,              0,      { 0, 0 },       0,      { 0 }
 182 },
 183 #if IPSEC_ESP
 184 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 185   esp4_input,   0,              0,              0,
 186   0,
 187   0,            0,              0,              0,
 188   0,
 189   &nousrreqs,
 190   0,            0,              0,      { 0, 0 },       0,      { 0 }
 191 },
 192 #endif
 193 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR|PR_PROTOLOCK,
 194   ipcomp4_input, 0,             0,              0,
 195   0,
 196   0,            0,              0,              0,
 197   0,
 198   &nousrreqs,
 199   0,            0,              0,      { 0, 0 },       0,      { 0 }
 200 },
 201 #endif /* IPSEC */
 202 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 203   encap4_input, 0,              0,              rip_ctloutput,
 204   0,
 205   encap_init,           0,              0,              0,
 206   0,
 207   &rip_usrreqs,
 208   0,            0,              0,      { 0, 0 },       0,      { 0 }
 209 },
 210 # if INET6
 211 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 212   encap4_input, 0,              0,              rip_ctloutput,
 213   0,
 214   encap_init,   0,              0,              0,
 215   0,
 216   &rip_usrreqs,
 217   0,            0,              0,      { 0, 0 },       0,      { 0 }
 218 },
 219 #endif
 220 #if IPDIVERT
 221 { SOCK_RAW,     &inetdomain,    IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR|PR_PCBLOCK,
 222   div_input,    0,              0,              ip_ctloutput,
 223   0,
 224   div_init,     0,              0,              0,
 225   0,
 226   &div_usrreqs,
 227   div_lock,             div_unlock,             div_getlock,    { 0, 0 },       0,      { 0 }
 228 },
 229 #endif
 230 #if IPXIP
 231 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 232   ipxip_input,  0,              ipxip_ctlinput, 0,
 233   0,
 234   0,            0,              0,              0,
 235   0,
 236   &rip_usrreqs,
 237   0,            0,              0,      { 0, 0 },       0,      { 0 }
 238 },
 239 #endif
 240 #if NSIP
 241 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 242   idpip_input,  0,              nsip_ctlinput,  0,
 243   0,
 244   0,            0,              0,              0,
 245   0,
 246   &rip_usrreqs,
 247   0,            0,              0,      { 0, 0 },       0,      { 0 }
 248 },
 249 #endif
 250         /* raw wildcard */
 251 { SOCK_RAW,     &inetdomain,    0,              PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 252   rip_input,    0,              0,              rip_ctloutput,
 253   0,
 254   rip_init,     0,              0,              0,
 255   0,
 256   &rip_usrreqs,
 257   0,                    rip_unlock,             0,      { 0, 0 },       0,      { 0 }
 258 },
 259 };
 260
 261 extern int in_inithead(void **, int);
 262
 263 int in_proto_count = (sizeof (inetsw) / sizeof (struct protosw));
 264
 265 extern void in_dinit(void);
 266 /* A routing init function, and a header size */
 267 struct domain inetdomain =
 268     { AF_INET,
 269       "internet",
 270       in_dinit,
 271       0,
 272       0,
 273       inetsw,
 274       0,
 275       in_inithead,
 276       32,
 277       sizeof(struct sockaddr_in),
 278       sizeof(struct tcpiphdr),
 279       0,
 280       0,
 281       0,
 282       { 0, 0}
 283     };
 284
 285 DOMAIN_SET(inet);
 286
 287 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 288         "Internet Family");
 289
 290 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 291 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 292 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 293 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 294 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 295 #if IPSEC
 296 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 297 #endif /* IPSEC */
 298 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 299 #if IPDIVERT
 300 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  div,    CTLFLAG_RW, 0,  "DIVERT");
 301 #endif
 302