bsd/netinet/in_proto.c

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