in.h revision 1.14
1 /* $NetBSD: in.h,v 1.14 1995/04/13 06:27:30 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990, 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.h 8.3 (Berkeley) 1/3/94 36 */ 37 38 /* 39 * Constants and structures defined by the internet system, 40 * Per RFC 790, September 1981, and numerous additions. 41 */ 42 43 #ifndef _NETINET_IN_H_ 44 #define _NETINET_IN_H_ 45 46 /* 47 * Protocols 48 */ 49 #define IPPROTO_IP 0 /* dummy for IP */ 50 #define IPPROTO_ICMP 1 /* control message protocol */ 51 #define IPPROTO_IGMP 2 /* group mgmt protocol */ 52 #define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 53 #define IPPROTO_TCP 6 /* tcp */ 54 #define IPPROTO_EGP 8 /* exterior gateway protocol */ 55 #define IPPROTO_PUP 12 /* pup */ 56 #define IPPROTO_UDP 17 /* user datagram protocol */ 57 #define IPPROTO_IDP 22 /* xns idp */ 58 #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 59 #define IPPROTO_EON 80 /* ISO cnlp */ 60 #define IPPROTO_ENCAP 98 /* encapsulation header */ 61 62 #define IPPROTO_RAW 255 /* raw IP packet */ 63 #define IPPROTO_MAX 256 64 65 66 /* 67 * Local port number conventions: 68 * Ports < IPPORT_RESERVED are reserved for 69 * privileged processes (e.g. root). 70 * Ports > IPPORT_USERRESERVED are reserved 71 * for servers, not necessarily privileged. 72 */ 73 #define IPPORT_RESERVED 1024 74 #define IPPORT_USERRESERVED 5000 75 76 /* 77 * Internet address (a structure for historical reasons) 78 */ 79 struct in_addr { 80 u_int32_t s_addr; 81 }; 82 83 /* 84 * Definitions of bits in internet address integers. 85 * On subnets, the decomposition of addresses to host and net parts 86 * is done according to subnet mask, not the masks here. 87 */ 88 #define IN_CLASSA(i) (((int32_t)(i) & 0x80000000) == 0) 89 #define IN_CLASSA_NET 0xff000000 90 #define IN_CLASSA_NSHIFT 24 91 #define IN_CLASSA_HOST 0x00ffffff 92 #define IN_CLASSA_MAX 128 93 94 #define IN_CLASSB(i) (((int32_t)(i) & 0xc0000000) == 0x80000000) 95 #define IN_CLASSB_NET 0xffff0000 96 #define IN_CLASSB_NSHIFT 16 97 #define IN_CLASSB_HOST 0x0000ffff 98 #define IN_CLASSB_MAX 65536 99 100 #define IN_CLASSC(i) (((int32_t)(i) & 0xe0000000) == 0xc0000000) 101 #define IN_CLASSC_NET 0xffffff00 102 #define IN_CLASSC_NSHIFT 8 103 #define IN_CLASSC_HOST 0x000000ff 104 105 #define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000) 106 #define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 107 #define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 108 #define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 109 #define IN_MULTICAST(i) IN_CLASSD(i) 110 111 #define IN_EXPERIMENTAL(i) (((int32_t)(i) & 0xf0000000) == 0xf0000000) 112 #define IN_BADCLASS(i) (((int32_t)(i) & 0xf0000000) == 0xf0000000) 113 114 #define INADDR_ANY (u_int32_t)0x00000000 115 #define INADDR_LOOPBACK (u_int32_t)0x7f000001 116 #define INADDR_BROADCAST (u_int32_t)0xffffffff /* must be masked */ 117 #ifndef _KERNEL 118 #define INADDR_NONE 0xffffffff /* -1 return */ 119 #endif 120 121 #define INADDR_UNSPEC_GROUP (u_int32_t)0xe0000000 /* 224.0.0.0 */ 122 #define INADDR_ALLHOSTS_GROUP (u_int32_t)0xe0000001 /* 224.0.0.1 */ 123 #define INADDR_MAX_LOCAL_GROUP (u_int32_t)0xe00000ff /* 224.0.0.255 */ 124 125 #define IN_LOOPBACKNET 127 /* official! */ 126 127 /* 128 * Socket address, internet style. 129 */ 130 struct sockaddr_in { 131 u_int8_t sin_len; 132 u_int8_t sin_family; 133 u_int16_t sin_port; 134 struct in_addr sin_addr; 135 int8_t sin_zero[8]; 136 }; 137 138 /* 139 * Structure used to describe IP options. 140 * Used to store options internally, to pass them to a process, 141 * or to restore options retrieved earlier. 142 * The ip_dst is used for the first-hop gateway when using a source route 143 * (this gets put into the header proper). 144 */ 145 struct ip_opts { 146 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 147 int8_t ip_opts[40]; /* actually variable in size */ 148 }; 149 150 /* 151 * Options for use with [gs]etsockopt at the IP level. 152 * First word of comment is data type; bool is stored in int. 153 */ 154 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 155 #define IP_HDRINCL 2 /* int; header is included with data */ 156 #define IP_TOS 3 /* int; IP type of service and preced. */ 157 #define IP_TTL 4 /* int; IP time to live */ 158 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 159 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 160 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 161 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 162 #define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 163 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 164 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 165 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 166 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 167 168 /* 169 * Defaults and limits for options 170 */ 171 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 172 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 173 #define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 174 175 /* 176 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 177 */ 178 struct ip_mreq { 179 struct in_addr imr_multiaddr; /* IP multicast address of group */ 180 struct in_addr imr_interface; /* local IP address of interface */ 181 }; 182 183 /* 184 * Definitions for inet sysctl operations. 185 * 186 * Third level is protocol number. 187 * Fourth level is desired variable within that protocol. 188 */ 189 #define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 190 191 #define CTL_IPPROTO_NAMES { \ 192 { "ip", CTLTYPE_NODE }, \ 193 { "icmp", CTLTYPE_NODE }, \ 194 { "igmp", CTLTYPE_NODE }, \ 195 { "ggp", CTLTYPE_NODE }, \ 196 { 0, 0 }, \ 197 { 0, 0 }, \ 198 { "tcp", CTLTYPE_NODE }, \ 199 { 0, 0 }, \ 200 { "egp", CTLTYPE_NODE }, \ 201 { 0, 0 }, \ 202 { 0, 0 }, \ 203 { 0, 0 }, \ 204 { "pup", CTLTYPE_NODE }, \ 205 { 0, 0 }, \ 206 { 0, 0 }, \ 207 { 0, 0 }, \ 208 { 0, 0 }, \ 209 { "udp", CTLTYPE_NODE }, \ 210 { 0, 0 }, \ 211 { 0, 0 }, \ 212 { 0, 0 }, \ 213 { 0, 0 }, \ 214 { "idp", CTLTYPE_NODE }, \ 215 } 216 217 /* 218 * Names for IP sysctl objects 219 */ 220 #define IPCTL_FORWARDING 1 /* act as router */ 221 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 222 #define IPCTL_DEFTTL 3 /* default TTL */ 223 #ifdef notyet 224 #define IPCTL_DEFMTU 4 /* default MTU */ 225 #endif 226 #define IPCTL_MAXID 5 227 228 #define IPCTL_NAMES { \ 229 { 0, 0 }, \ 230 { "forwarding", CTLTYPE_INT }, \ 231 { "redirect", CTLTYPE_INT }, \ 232 { "ttl", CTLTYPE_INT }, \ 233 { "mtu", CTLTYPE_INT }, \ 234 } 235 236 237 #ifdef _KERNEL 238 int in_broadcast __P((struct in_addr, struct ifnet *)); 239 int in_canforward __P((struct in_addr)); 240 int in_cksum __P((struct mbuf *, int)); 241 int in_localaddr __P((struct in_addr)); 242 u_int32_t in_netof __P((struct in_addr)); 243 void in_socktrim __P((struct sockaddr_in *)); 244 #endif 245 #endif /* !_NETINET_IN_H_ */ 246
Indexes created Sat Sep 20 22:09:52 GMT 2025