in.h revision 1.9
1 /* 2 * Copyright (c) 1982, 1986, 1990, 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 * from: @(#)in.h 8.3 (Berkeley) 1/3/94 34 * $Id: in.h,v 1.9 1994/05/13 06:06:04 mycroft Exp $ 35 */ 36 37 /* 38 * Constants and structures defined by the internet system, 39 * Per RFC 790, September 1981, and numerous additions. 40 */ 41 42 /* 43 * Protocols 44 */ 45 #define IPPROTO_IP 0 /* dummy for IP */ 46 #define IPPROTO_ICMP 1 /* control message protocol */ 47 #define IPPROTO_IGMP 2 /* group mgmt protocol */ 48 #define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 49 #define IPPROTO_TCP 6 /* tcp */ 50 #define IPPROTO_EGP 8 /* exterior gateway protocol */ 51 #define IPPROTO_PUP 12 /* pup */ 52 #define IPPROTO_UDP 17 /* user datagram protocol */ 53 #define IPPROTO_IDP 22 /* xns idp */ 54 #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 55 #define IPPROTO_EON 80 /* ISO cnlp */ 56 #define IPPROTO_ENCAP 98 /* encapsulation header */ 57 58 #define IPPROTO_RAW 255 /* raw IP packet */ 59 #define IPPROTO_MAX 256 60 61 62 /* 63 * Local port number conventions: 64 * Ports < IPPORT_RESERVED are reserved for 65 * privileged processes (e.g. root). 66 * Ports > IPPORT_USERRESERVED are reserved 67 * for servers, not necessarily privileged. 68 */ 69 #define IPPORT_RESERVED 1024 70 #define IPPORT_USERRESERVED 5000 71 72 /* 73 * Internet address (a structure for historical reasons) 74 */ 75 struct in_addr { 76 u_long s_addr; 77 }; 78 79 /* 80 * Definitions of bits in internet address integers. 81 * On subnets, the decomposition of addresses to host and net parts 82 * is done according to subnet mask, not the masks here. 83 */ 84 #define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0) 85 #define IN_CLASSA_NET 0xff000000 86 #define IN_CLASSA_NSHIFT 24 87 #define IN_CLASSA_HOST 0x00ffffff 88 #define IN_CLASSA_MAX 128 89 90 #define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000) 91 #define IN_CLASSB_NET 0xffff0000 92 #define IN_CLASSB_NSHIFT 16 93 #define IN_CLASSB_HOST 0x0000ffff 94 #define IN_CLASSB_MAX 65536 95 96 #define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000) 97 #define IN_CLASSC_NET 0xffffff00 98 #define IN_CLASSC_NSHIFT 8 99 #define IN_CLASSC_HOST 0x000000ff 100 101 #define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000) 102 #define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 103 #define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 104 #define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 105 #define IN_MULTICAST(i) IN_CLASSD(i) 106 107 #define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000) 108 #define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000) 109 110 #define INADDR_ANY (u_long)0x00000000 111 #define INADDR_LOOPBACK (u_long)0x7f000001 112 #define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */ 113 #ifndef KERNEL 114 #define INADDR_NONE 0xffffffff /* -1 return */ 115 #endif 116 117 #define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */ 118 #define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */ 119 #define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */ 120 121 #define IN_LOOPBACKNET 127 /* official! */ 122 123 /* 124 * Socket address, internet style. 125 */ 126 struct sockaddr_in { 127 u_char sin_len; 128 u_char sin_family; 129 u_short sin_port; 130 struct in_addr sin_addr; 131 char sin_zero[8]; 132 }; 133 134 /* 135 * Structure used to describe IP options. 136 * Used to store options internally, to pass them to a process, 137 * or to restore options retrieved earlier. 138 * The ip_dst is used for the first-hop gateway when using a source route 139 * (this gets put into the header proper). 140 */ 141 struct ip_opts { 142 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 143 char ip_opts[40]; /* actually variable in size */ 144 }; 145 146 /* 147 * Options for use with [gs]etsockopt at the IP level. 148 * First word of comment is data type; bool is stored in int. 149 */ 150 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 151 #define IP_HDRINCL 2 /* int; header is included with data */ 152 #define IP_TOS 3 /* int; IP type of service and preced. */ 153 #define IP_TTL 4 /* int; IP time to live */ 154 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 155 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 156 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 157 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 158 #define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 159 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 160 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 161 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 162 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 163 164 /* 165 * Defaults and limits for options 166 */ 167 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 168 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 169 #define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 170 171 /* 172 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 173 */ 174 struct ip_mreq { 175 struct in_addr imr_multiaddr; /* IP multicast address of group */ 176 struct in_addr imr_interface; /* local IP address of interface */ 177 }; 178 179 /* 180 * Definitions for inet sysctl operations. 181 * 182 * Third level is protocol number. 183 * Fourth level is desired variable within that protocol. 184 */ 185 #define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 186 187 #define CTL_IPPROTO_NAMES { \ 188 { "ip", CTLTYPE_NODE }, \ 189 { "icmp", CTLTYPE_NODE }, \ 190 { "igmp", CTLTYPE_NODE }, \ 191 { "ggp", CTLTYPE_NODE }, \ 192 { 0, 0 }, \ 193 { 0, 0 }, \ 194 { "tcp", CTLTYPE_NODE }, \ 195 { 0, 0 }, \ 196 { "egp", CTLTYPE_NODE }, \ 197 { 0, 0 }, \ 198 { 0, 0 }, \ 199 { 0, 0 }, \ 200 { "pup", CTLTYPE_NODE }, \ 201 { 0, 0 }, \ 202 { 0, 0 }, \ 203 { 0, 0 }, \ 204 { 0, 0 }, \ 205 { "udp", CTLTYPE_NODE }, \ 206 { 0, 0 }, \ 207 { 0, 0 }, \ 208 { 0, 0 }, \ 209 { 0, 0 }, \ 210 { "idp", CTLTYPE_NODE }, \ 211 } 212 213 /* 214 * Names for IP sysctl objects 215 */ 216 #define IPCTL_FORWARDING 1 /* act as router */ 217 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 218 #define IPCTL_DEFTTL 3 /* default TTL */ 219 #ifdef notyet 220 #define IPCTL_DEFMTU 4 /* default MTU */ 221 #endif 222 #define IPCTL_MAXID 5 223 224 #define IPCTL_NAMES { \ 225 { 0, 0 }, \ 226 { "forwarding", CTLTYPE_INT }, \ 227 { "redirect", CTLTYPE_INT }, \ 228 { "ttl", CTLTYPE_INT }, \ 229 { "mtu", CTLTYPE_INT }, \ 230 } 231 232 233 #ifdef KERNEL 234 int in_broadcast __P((struct in_addr, struct ifnet *)); 235 int in_canforward __P((struct in_addr)); 236 int in_cksum __P((struct mbuf *, int)); 237 int in_localaddr __P((struct in_addr)); 238 u_long in_netof __P((struct in_addr)); 239 void in_socktrim __P((struct sockaddr_in *)); 240 #endif 241
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