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 * $FreeBSD$ 35 */ 36 37 #include "opt_ipdivert.h" 38 #include "opt_ipx.h" 39 #include "opt_ipsec.h" 40 #include "opt_inet6.h" 41 42 #include <sys/param.h> 43 #include <sys/kernel.h> 44 #include <sys/socket.h> 45 #include <sys/domain.h> 46 #include <sys/protosw.h> 47 #include <sys/queue.h> 48 #include <sys/sysctl.h> 49 50 #include <net/if.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/igmp_var.h> 59 #include <netinet/tcp.h> 60 #include <netinet/tcp_timer.h> 61 #include <netinet/tcp_var.h> 62 #include <netinet/udp.h> 63 #include <netinet/udp_var.h> 64 #include <netinet/ip_encap.h> 65 66 /* 67 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 68 */ 69 70 #ifdef IPSEC 71 #include <netinet6/ipsec.h> 72 #include <netinet6/ah.h> 73 #ifdef IPSEC_ESP 74 #include <netinet6/esp.h> 75 #endif 76 #include <netinet6/ipcomp.h> 77 #endif /* IPSEC */ 78 79 #ifdef FAST_IPESC 80 #include <netipsec/ipsec.h> 81 #define ah4_input ipsec4_common_input 82 #define esp4_input ipsec4_common_input 83 #define ipcomp4_input ipsec4_common_input 84 #define IPSEC 85 #endif /* FAST_IPSEC */ 86 87 #ifdef IPXIP 88 #include <netipx/ipx_ip.h> 89 #endif 90 91 #ifdef NSIP 92 #include <netns/ns.h> 93 #include <netns/ns_if.h> 94 #endif 95 96 extern struct domain inetdomain; 97 static struct pr_usrreqs nousrreqs; 98 99 struct protosw inetsw[] = { 100 { 0, &inetdomain, 0, 0, 101 0, 0, 0, 0, 102 0, 103 ip_init, 0, ip_slowtimo, ip_drain, 104 &nousrreqs 105 }, 106 { SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 107 udp_input, 0, udp_ctlinput, ip_ctloutput, 108 0, 109 udp_init, 0, 0, 0, 110 &udp_usrreqs 111 }, 112 { SOCK_STREAM, &inetdomain, IPPROTO_TCP, 113 PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD, 114 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 115 0, 116 tcp_init, 0, tcp_slowtimo, tcp_drain, 117 &tcp_usrreqs 118 }, 119 { SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 120 rip_input, 0, rip_ctlinput, rip_ctloutput, 121 0, 122 0, 0, 0, 0, 123 &rip_usrreqs 124 }, 125 { SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 126 icmp_input, 0, 0, rip_ctloutput, 127 0, 128 0, 0, 0, 0, 129 &rip_usrreqs 130 }, 131 { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 132 igmp_input, 0, 0, rip_ctloutput, 133 0, 134 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 135 &rip_usrreqs 136 }, 137 { SOCK_RAW, &inetdomain, IPPROTO_RSVP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 138 rsvp_input, 0, 0, rip_ctloutput, 139 0, 140 0, 0, 0, 0, 141 &rip_usrreqs 142 }, 143 #ifdef IPSEC 144 { SOCK_RAW, &inetdomain, IPPROTO_AH, PR_ATOMIC|PR_ADDR, 145 ah4_input, 0, 0, 0, 146 0, 147 0, 0, 0, 0, 148 &nousrreqs 149 }, 150 #ifdef IPSEC_ESP 151 { SOCK_RAW, &inetdomain, IPPROTO_ESP, PR_ATOMIC|PR_ADDR, 152 esp4_input, 0, 0, 0, 153 0, 154 0, 0, 0, 0, 155 &nousrreqs 156 }, 157 #endif 158 { SOCK_RAW, &inetdomain, IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR, 159 ipcomp4_input, 0, 0, 0, 160 0, 161 0, 0, 0, 0, 162 &nousrreqs 163 }, 164 #endif /* IPSEC */ 165 { SOCK_RAW, &inetdomain, IPPROTO_IPV4, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 166 encap4_input, 0, 0, rip_ctloutput, 167 0, 168 encap_init, 0, 0, 0, 169 &rip_usrreqs 170 }, 171 { SOCK_RAW, &inetdomain, IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 172 encap4_input, 0, 0, rip_ctloutput, 173 0, 174 encap_init, 0, 0, 0, 175 &rip_usrreqs 176 }, 177 { SOCK_RAW, &inetdomain, IPPROTO_GRE, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 178 encap4_input, 0, 0, rip_ctloutput, 179 0, 180 encap_init, 0, 0, 0, 181 &rip_usrreqs 182 }, 183 # ifdef INET6 184 { SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 185 encap4_input, 0, 0, rip_ctloutput, 186 0, 187 encap_init, 0, 0, 0, 188 &rip_usrreqs 189 }, 190 #endif 191 #ifdef IPDIVERT 192 { SOCK_RAW, &inetdomain, IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR, 193 div_input, 0, 0, ip_ctloutput, 194 0, 195 div_init, 0, 0, 0, 196 &div_usrreqs, 197 }, 198 #endif 199 #ifdef IPXIP 200 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 201 ipxip_input, 0, ipxip_ctlinput, 0, 202 0, 203 0, 0, 0, 0, 204 &rip_usrreqs 205 }, 206 #endif 207 #ifdef NSIP 208 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR|PR_LASTHDR, 209 idpip_input, 0, nsip_ctlinput, 0, 210 0, 211 0, 0, 0, 0, 212 &rip_usrreqs 213 }, 214 #endif 215 /* raw wildcard */ 216 { SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 217 rip_input, 0, 0, rip_ctloutput, 218 0, 219 rip_init, 0, 0, 0, 220 &rip_usrreqs 221 }, 222 }; 223 224 extern int in_inithead(void **, int); 225 226 struct domain inetdomain = 227 { AF_INET, "internet", 0, 0, 0, 228 inetsw, 229 &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 230 in_inithead, 32, sizeof(struct sockaddr_in) 231 }; 232 233 DOMAIN_SET(inet); 234 235 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW, 0, 236 "Internet Family"); 237 238 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW, 0, "IP"); 239 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW, 0, "ICMP"); 240 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW, 0, "UDP"); 241 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW, 0, "TCP"); 242 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW, 0, "IGMP"); 243 #ifdef FAST_IPSEC 244 /* XXX no protocol # to use, pick something "reserved" */ 245 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW, 0, "IPSEC"); 246 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW, 0, "AH"); 247 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW, 0, "ESP"); 248 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW, 0, "IPCOMP"); 249 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW, 0, "IPIP"); 250 #else 251 #ifdef IPSEC 252 SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW, 0, "IPSEC"); 253 #endif /* IPSEC */ 254 #endif /* !FAST_IPSEC */ 255 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW, 0, "RAW"); 256 #ifdef IPDIVERT 257 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, divert, CTLFLAG_RW, 0, "DIVERT"); 258 #endif 259 260