1 /* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 34 * $Id: in_proto.c,v 1.41 1997/09/16 11:43:55 bde Exp $ 35 */ 36 37 #include "opt_tcpdebug.h" 38 39 #include <sys/param.h> 40 #include <sys/queue.h> 41 #include <sys/kernel.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/domain.h> 45 #include <sys/mbuf.h> 46 #include <sys/protosw.h> 47 #include <sys/sysctl.h> 48 49 #include <net/if.h> 50 #include <net/radix.h> 51 #include <net/route.h> 52 53 #include <netinet/in.h> 54 #include <netinet/in_systm.h> 55 #include <netinet/ip.h> 56 #include <netinet/ip_var.h> 57 #include <netinet/ip_icmp.h> 58 #include <netinet/in_pcb.h> 59 #include <netinet/igmp_var.h> 60 #include <netinet/tcp.h> 61 #include <netinet/tcp_fsm.h> 62 #include <netinet/tcp_seq.h> 63 #include <netinet/tcp_timer.h> 64 #include <netinet/tcp_var.h> 65 #include <netinet/tcpip.h> 66 #ifdef TCPDEBUG 67 #include <netinet/tcp_debug.h> 68 #endif 69 #include <netinet/udp.h> 70 #include <netinet/udp_var.h> 71 /* 72 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 73 */ 74 75 #ifdef IPXIP 76 #include <netipx/ipx.h> 77 #include <netipx/ipx_ip.h> 78 #endif 79 80 #ifdef NSIP 81 #include <netns/ns.h> 82 #include <netns/ns_if.h> 83 #endif 84 85 #ifdef TPIP 86 void tpip_input(), tpip_ctlinput(), tp_init(), tp_slowtimo(), tp_drain(); 87 int tp_ctloutput(), tp_usrreq(); 88 #endif 89 90 #ifdef EON 91 void eoninput(), eonctlinput(), eonprotoinit(); 92 #endif /* EON */ 93 94 #ifdef IPFILTER 95 void iplinit(); 96 #define ip_init iplinit 97 #endif 98 99 100 extern struct domain inetdomain; 101 static struct pr_usrreqs nousrreqs; 102 103 struct protosw inetsw[] = { 104 { 0, &inetdomain, 0, 0, 105 0, 0, 0, 0, 106 0, 107 ip_init, 0, ip_slowtimo, ip_drain, 108 &nousrreqs 109 }, 110 { SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 111 udp_input, 0, udp_ctlinput, ip_ctloutput, 112 0, 113 udp_init, 0, 0, 0, 114 &udp_usrreqs 115 }, 116 { SOCK_STREAM, &inetdomain, IPPROTO_TCP, 117 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 118 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 119 0, 120 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, 121 &tcp_usrreqs 122 }, 123 { SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 124 rip_input, 0, rip_ctlinput, rip_ctloutput, 125 0, 126 0, 0, 0, 0, 127 &rip_usrreqs 128 }, 129 { SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR, 130 icmp_input, 0, 0, rip_ctloutput, 131 0, 132 0, 0, 0, 0, 133 &rip_usrreqs 134 }, 135 { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR, 136 igmp_input, 0, 0, rip_ctloutput, 137 0, 138 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 139 &rip_usrreqs 140 }, 141 { SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR, 142 rsvp_input, 0, 0, rip_ctloutput, 143 0, 144 0, 0, 0, 0, 145 &rip_usrreqs 146 }, 147 { SOCK_RAW, &inetdomain, IPPROTO_IPIP, PR_ATOMIC|PR_ADDR, 148 ipip_input, 0, 0, rip_ctloutput, 149 0, 150 0, 0, 0, 0, 151 &rip_usrreqs 152 }, 153 #ifdef IPDIVERT 154 { SOCK_RAW, &inetdomain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 155 div_input, 0, 0, ip_ctloutput, 156 0, 157 div_init, 0, 0, 0, 158 &div_usrreqs, 159 }, 160 #endif 161 #ifdef TPIP 162 { SOCK_SEQPACKET,&inetdomain, IPPROTO_TP, PR_CONNREQUIRED|PR_WANTRCVD, 163 tpip_input, 0, tpip_ctlinput, tp_ctloutput, 164 tp_usrreq, 165 tp_init, 0, tp_slowtimo, tp_drain, 166 }, 167 #endif 168 /* EON (ISO CLNL over IP) */ 169 #ifdef EON 170 { SOCK_RAW, &inetdomain, IPPROTO_EON, 0, 171 eoninput, 0, eonctlinput, 0, 172 0, 173 eonprotoinit, 0, 0, 0, 174 }, 175 #endif 176 #ifdef IPXIP 177 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR, 178 ipxip_input, 0, ipxip_ctlinput, 0, 179 0, 180 0, 0, 0, 0, 181 &rip_usrreqs 182 }, 183 #endif 184 #ifdef NSIP 185 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR, 186 idpip_input, 0, nsip_ctlinput, 0, 187 0, 188 0, 0, 0, 0, 189 &rip_usrreqs 190 }, 191 #endif 192 /* raw wildcard */ 193 { SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 194 rip_input, 0, 0, rip_ctloutput, 195 0, 196 rip_init, 0, 0, 0, 197 &rip_usrreqs 198 }, 199 }; 200 201 extern int in_inithead __P((void **, int)); 202 203 struct domain inetdomain = 204 { AF_INET, "internet", 0, 0, 0, 205 inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 206 in_inithead, 32, sizeof(struct sockaddr_in) 207 }; 208 209 DOMAIN_SET(inet); 210 211 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 212 "Internet Family"); 213 214 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 215 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 216 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 217 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 218 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 219 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 220 #ifdef IPDIVERT 221 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, div, CTLFLAG_RW, 0, "DIVERT"); 222 #endif 223 224