1 /* $NetBSD: in_proto.c,v 1.18 1998/01/05 10:31:55 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 36 */ 37 38 #include <sys/param.h> 39 #include <sys/socket.h> 40 #include <sys/protosw.h> 41 #include <sys/domain.h> 42 #include <sys/mbuf.h> 43 44 #include <net/if.h> 45 #include <net/radix.h> 46 #include <net/route.h> 47 48 #include <netinet/in.h> 49 #include <netinet/in_systm.h> 50 #include <netinet/ip.h> 51 #include <netinet/ip_var.h> 52 #include <netinet/ip_icmp.h> 53 #include <netinet/in_pcb.h> 54 #include <netinet/igmp_var.h> 55 #include <netinet/tcp.h> 56 #include <netinet/tcp_fsm.h> 57 #include <netinet/tcp_seq.h> 58 #include <netinet/tcp_timer.h> 59 #include <netinet/tcp_var.h> 60 #include <netinet/tcpip.h> 61 #include <netinet/tcp_debug.h> 62 #include <netinet/udp.h> 63 #include <netinet/udp_var.h> 64 /* 65 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 66 */ 67 68 #ifdef NSIP 69 #include <netns/ns_var.h> 70 #include <netns/idp_var.h> 71 #endif /* NSIP */ 72 73 #ifdef TPIP 74 #include <netiso/tp_param.h> 75 #include <netiso/tp_var.h> 76 #endif /* TPIP */ 77 78 #ifdef EON 79 #include <netiso/eonvar.h> 80 #endif /* EON */ 81 82 #ifdef MROUTING 83 #include <netinet/ip_mroute.h> 84 #endif /* MROUTING */ 85 86 extern struct domain inetdomain; 87 88 struct protosw inetsw[] = { 89 { 0, &inetdomain, 0, 0, 90 0, ip_output, 0, 0, 91 0, 92 ip_init, 0, ip_slowtimo, ip_drain, ip_sysctl 93 }, 94 { SOCK_DGRAM, &inetdomain, IPPROTO_UDP, PR_ATOMIC|PR_ADDR, 95 udp_input, 0, udp_ctlinput, ip_ctloutput, 96 udp_usrreq, 97 udp_init, 0, 0, 0, udp_sysctl 98 }, 99 { SOCK_STREAM, &inetdomain, IPPROTO_TCP, PR_CONNREQUIRED|PR_WANTRCVD, 100 tcp_input, 0, tcp_ctlinput, tcp_ctloutput, 101 tcp_usrreq, 102 tcp_init, tcp_fasttimo, tcp_slowtimo, tcp_drain, tcp_sysctl 103 }, 104 { SOCK_RAW, &inetdomain, IPPROTO_RAW, PR_ATOMIC|PR_ADDR, 105 rip_input, rip_output, 0, rip_ctloutput, 106 rip_usrreq, 107 0, 0, 0, 0, 108 }, 109 { SOCK_RAW, &inetdomain, IPPROTO_ICMP, PR_ATOMIC|PR_ADDR, 110 icmp_input, rip_output, 0, rip_ctloutput, 111 rip_usrreq, 112 0, 0, 0, 0, icmp_sysctl 113 }, 114 #ifdef MROUTING 115 { SOCK_RAW, &inetdomain, IPPROTO_IPIP, PR_ATOMIC|PR_ADDR, 116 ipip_input, rip_output, 0, rip_ctloutput, 117 rip_usrreq, /* XXX */ 118 0, 0, 0, 0, 119 }, 120 #endif /* MROUTING */ 121 { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR, 122 igmp_input, rip_output, 0, rip_ctloutput, 123 rip_usrreq, 124 igmp_init, igmp_fasttimo, igmp_slowtimo, 0, 125 }, 126 #ifdef TPIP 127 { SOCK_SEQPACKET,&inetdomain, IPPROTO_TP, PR_CONNREQUIRED|PR_WANTRCVD, 128 tpip_input, 0, tpip_ctlinput, tp_ctloutput, 129 tp_usrreq, 130 tp_init, 0, tp_slowtimo, tp_drain, 131 }, 132 #endif /* TPIP */ 133 /* EON (ISO CLNL over IP) */ 134 #ifdef EON 135 { SOCK_RAW, &inetdomain, IPPROTO_EON, 0, 136 eoninput, 0, eonctlinput, 0, 137 0, 138 eonprotoinit, 0, 0, 0, 139 }, 140 #endif /* EON */ 141 #ifdef NSIP 142 { SOCK_RAW, &inetdomain, IPPROTO_IDP, PR_ATOMIC|PR_ADDR, 143 idpip_input, NULL, nsip_ctlinput, 0, 144 rip_usrreq, 145 0, 0, 0, 0, 146 }, 147 #endif /* NSIP */ 148 /* raw wildcard */ 149 { SOCK_RAW, &inetdomain, 0, PR_ATOMIC|PR_ADDR, 150 rip_input, rip_output, 0, rip_ctloutput, 151 rip_usrreq, 152 rip_init, 0, 0, 0, 153 }, 154 }; 155 156 struct domain inetdomain = 157 { AF_INET, "internet", 0, 0, 0, 158 inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0, 159 rn_inithead, 32, sizeof(struct sockaddr_in) }; 160 161 #ifdef notyet /* XXXX */ 162 #include "imp.h" 163 #if NIMP > 0 164 extern struct domain impdomain; 165 int rimp_output(), hostslowtimo(); 166 167 struct protosw impsw[] = { 168 { SOCK_RAW, &impdomain, 0, PR_ATOMIC|PR_ADDR, 169 0, rimp_output, 0, 0, 170 rip_usrreq, 171 0, 0, hostslowtimo, 0, 172 }, 173 }; 174 175 struct domain impdomain = 176 { AF_IMPLINK, "imp", 0, 0, 0, 177 impsw, &impsw[sizeof (impsw)/sizeof(impsw[0])] }; 178 #endif 179 180 #include "hy.h" 181 #if NHY > 0 182 /* 183 * HYPERchannel protocol family: raw interface. 184 */ 185 int rhy_output(); 186 extern struct domain hydomain; 187 188 struct protosw hysw[] = { 189 { SOCK_RAW, &hydomain, 0, PR_ATOMIC|PR_ADDR, 190 0, rhy_output, 0, 0, 191 rip_usrreq, 192 0, 0, 0, 0, 193 }, 194 }; 195 196 struct domain hydomain = 197 { AF_HYLINK, "hy", 0, 0, 0, hysw, &hysw[sizeof (hysw)/sizeof(hysw[0])] }; 198 #endif 199 #endif 200 201 202 #define TCP_SYN_HASH_SIZE 293 203 #define TCP_SYN_BUCKET_SIZE 35 204 205 int tcp_syn_cache_size = TCP_SYN_HASH_SIZE; 206 int tcp_syn_cache_limit = TCP_SYN_HASH_SIZE*TCP_SYN_BUCKET_SIZE; 207 int tcp_syn_bucket_limit = 3*TCP_SYN_BUCKET_SIZE; 208 struct syn_cache_head tcp_syn_cache[TCP_SYN_HASH_SIZE]; 209 struct syn_cache_head *tcp_syn_cache_first; 210 int tcp_syn_cache_interval = 8; /* runs timer every 4 seconds */ 211 int tcp_syn_cache_timeo = TCPTV_KEEP_INIT; 212