bsd/netinet/in_proto.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1982, 1986, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
  58  */
  59
  60 #include <sys/param.h>
  61 #include <sys/kernel.h>
  62 #include <sys/socket.h>
  63 #include <sys/domain.h>
  64 #include <sys/protosw.h>
  65 #include <sys/queue.h>
  66 #include <sys/sysctl.h>
  67
  68 #include <net/if.h>
  69 #include <net/route.h>
  70
  71 #include <netinet/in.h>
  72 #include <netinet/in_systm.h>
  73 #include <netinet/ip.h>
  74 #include <netinet/ip_var.h>
  75 #include <netinet/ip_icmp.h>
  76 #include <netinet/igmp_var.h>
  77 #include <netinet/tcp.h>
  78 #include <netinet/tcp_timer.h>
  79 #include <netinet/tcp_var.h>
  80 #include <netinet/tcpip.h>
  81 #include <netinet/udp.h>
  82 #include <netinet/udp_var.h>
  83 #include <netinet/ip_encap.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 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,            &nousrreqs
 114 },
 115 { SOCK_DGRAM,   &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR,
 116   udp_input,    0,              udp_ctlinput,   ip_ctloutput,
 117   0,
 118   udp_init,     0,              0,              0,
 119   0, &udp_usrreqs
 120 },
 121 { SOCK_STREAM,  &inetdomain,    IPPROTO_TCP,
 122         PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
 123   tcp_input,    0,              tcp_ctlinput,   tcp_ctloutput,
 124   0,
 125   tcp_init,     tcp_fasttimo,   tcp_slowtimo,   tcp_drain,
 126   0, &tcp_usrreqs
 127 },
 128 { SOCK_RAW,     &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
 129   rip_input,    0,              rip_ctlinput,   rip_ctloutput,
 130   0,
 131   0,            0,              0,              0,
 132   0, &rip_usrreqs
 133 },
 134 { SOCK_RAW,     &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 135   icmp_input,   0,              0,              rip_ctloutput,
 136   0,
 137   0,            0,              0,              0,
 138   0, &rip_usrreqs
 139 },
 140 { SOCK_DGRAM, &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 141   icmp_input,   0,              0,              icmp_dgram_ctloutput,
 142   0,
 143   0,            0,              0,              0,
 144   0, &icmp_dgram_usrreqs
 145 },
 146 { SOCK_RAW,     &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 147   igmp_input,   0,              0,              rip_ctloutput,
 148   0,
 149   igmp_init,    igmp_fasttimo,  igmp_slowtimo,  0,
 150   0, &rip_usrreqs
 151 },
 152 { SOCK_RAW,     &inetdomain,    IPPROTO_RSVP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 153   rsvp_input,   0,              0,              rip_ctloutput,
 154   0,
 155   0,            0,              0,              0,
 156   0, &rip_usrreqs
 157 },
 158 #if IPSEC
 159 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
 160   ah4_input,    0,              0,              0,
 161   0,
 162   0,            0,              0,              0,
 163   0, &nousrreqs
 164 },
 165 #if IPSEC_ESP
 166 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
 167   esp4_input,   0,              0,              0,
 168   0,
 169   0,            0,              0,              0,
 170   0, &nousrreqs
 171 },
 172 #endif
 173 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
 174   ipcomp4_input, 0,             0,              0,
 175   0,
 176   0,            0,              0,              0,
 177   0, &nousrreqs
 178 },
 179 #endif /* IPSEC */
 180 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 181   encap4_input, 0,              0,              rip_ctloutput,
 182   0,
 183   encap_init,           0,              0,              0,
 184   0, &rip_usrreqs
 185 },
 186 # if INET6
 187 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 188   encap4_input, 0,              0,              rip_ctloutput,
 189   0,
 190   encap_init,   0,              0,              0,
 191   0, &rip_usrreqs
 192 },
 193 #endif
 194 #if IPDIVERT
 195 { SOCK_RAW,     &inetdomain,    IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR,
 196   div_input,    0,              0,              ip_ctloutput,
 197   0,
 198   div_init,     0,              0,              0,
 199   0, &div_usrreqs,
 200 },
 201 #endif
 202 #if IPXIP
 203 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 204   ipxip_input,  0,              ipxip_ctlinput, 0,
 205   0,
 206   0,            0,              0,              0,
 207   0, &rip_usrreqs
 208 },
 209 #endif
 210 #if NSIP
 211 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
 212   idpip_input,  0,              nsip_ctlinput,  0,
 213   0,
 214   0,            0,              0,              0,
 215   0, &rip_usrreqs
 216 },
 217 #endif
 218         /* raw wildcard */
 219 { SOCK_RAW,     &inetdomain,    0,              PR_ATOMIC|PR_ADDR,
 220   rip_input,    0,              0,              rip_ctloutput,
 221   0,
 222   rip_init,     0,              0,              0,
 223   0, &rip_usrreqs
 224 },
 225 };
 226
 227 extern int in_inithead __P((void **, int));
 228
 229 int in_proto_count = (sizeof (inetsw) / sizeof (struct protosw));
 230
 231 extern void in_dinit(void);
 232 /* A routing init function, and a header size */
 233 struct domain inetdomain =
 234     { AF_INET, "internet", in_dinit, 0, 0,
 235       inetsw, 0,
 236       in_inithead, 32, sizeof(struct sockaddr_in),
 237       sizeof(struct tcpiphdr), 0
 238     };
 239
 240 DOMAIN_SET(inet);
 241
 242 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
 243         "Internet Family");
 244
 245 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
 246 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
 247 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
 248 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
 249 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
 250 #if IPSEC
 251 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
 252 #endif /* IPSEC */
 253 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
 254 #if IPDIVERT
 255 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  div,    CTLFLAG_RW, 0,  "DIVERT");
 256 #endif
 257