in.h revision 1.22
1 /* $NetBSD: in.h,v 1.22 1996/09/09 14:51:10 mycroft 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_IPIP 4 /* IP inside IP */ 54 #define IPPROTO_TCP 6 /* tcp */ 55 #define IPPROTO_EGP 8 /* exterior gateway protocol */ 56 #define IPPROTO_PUP 12 /* pup */ 57 #define IPPROTO_UDP 17 /* user datagram protocol */ 58 #define IPPROTO_IDP 22 /* xns idp */ 59 #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 60 #define IPPROTO_EON 80 /* ISO cnlp */ 61 #define IPPROTO_ENCAP 98 /* encapsulation header */ 62 63 #define IPPROTO_RAW 255 /* raw IP packet */ 64 #define IPPROTO_MAX 256 65 66 67 /* 68 * Local port number conventions: 69 * Ports < IPPORT_RESERVED are reserved for 70 * privileged processes (e.g. root). 71 * Ports > IPPORT_USERRESERVED are reserved 72 * for servers, not necessarily privileged. 73 */ 74 #define IPPORT_RESERVED 1024 75 #define IPPORT_USERRESERVED 5000 76 77 /* 78 * Internet address (a structure for historical reasons) 79 */ 80 struct in_addr { 81 u_int32_t s_addr; 82 }; 83 84 /* 85 * Definitions of bits in internet address integers. 86 * On subnets, the decomposition of addresses to host and net parts 87 * is done according to subnet mask, not the masks here. 88 * 89 * By byte-swapping the constants, we avoid ever having to byte-swap IP 90 * addresses inside the kernel. Unfortunately, user-level programs rely 91 * on these macros not doing byte-swapping. 92 */ 93 #ifdef _KERNEL 94 #define __IPADDR(x) ((u_int32_t) htonl((u_int32_t)(x))) 95 #else 96 #define __IPADDR(x) ((u_int32_t)(x)) 97 #endif 98 99 #define IN_CLASSA(i) (((u_int32_t)(i) & __IPADDR(0x80000000)) == \ 100 __IPADDR(0x00000000)) 101 #define IN_CLASSA_NET __IPADDR(0xff000000) 102 #define IN_CLASSA_NSHIFT 24 103 #define IN_CLASSA_HOST __IPADDR(0x00ffffff) 104 #define IN_CLASSA_MAX 128 105 106 #define IN_CLASSB(i) (((u_int32_t)(i) & __IPADDR(0xc0000000)) == \ 107 __IPADDR(0x80000000)) 108 #define IN_CLASSB_NET __IPADDR(0xffff0000) 109 #define IN_CLASSB_NSHIFT 16 110 #define IN_CLASSB_HOST __IPADDR(0x0000ffff) 111 #define IN_CLASSB_MAX 65536 112 113 #define IN_CLASSC(i) (((u_int32_t)(i) & __IPADDR(0xe0000000)) == \ 114 __IPADDR(0xc0000000)) 115 #define IN_CLASSC_NET __IPADDR(0xffffff00) 116 #define IN_CLASSC_NSHIFT 8 117 #define IN_CLASSC_HOST __IPADDR(0x000000ff) 118 119 #define IN_CLASSD(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 120 __IPADDR(0xe0000000)) 121 /* These ones aren't really net and host fields, but routing needn't know. */ 122 #define IN_CLASSD_NET __IPADDR(0xf0000000) 123 #define IN_CLASSD_NSHIFT 28 124 #define IN_CLASSD_HOST __IPADDR(0x0fffffff) 125 #define IN_MULTICAST(i) IN_CLASSD(i) 126 127 #define IN_EXPERIMENTAL(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 128 __IPADDR(0xf0000000)) 129 #define IN_BADCLASS(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 130 __IPADDR(0xf0000000)) 131 132 #define IN_LOCAL_GROUP(i) (((u_int32_t)(i) & __IPADDR(0xffffff00)) == \ 133 __IPADDR(0xe0000000)) 134 135 #define INADDR_ANY __IPADDR(0x00000000) 136 #define INADDR_LOOPBACK __IPADDR(0x7f000001) 137 #define INADDR_BROADCAST __IPADDR(0xffffffff) /* must be masked */ 138 #ifndef _KERNEL 139 #define INADDR_NONE __IPADDR(0xffffffff) /* -1 return */ 140 #endif 141 142 #define INADDR_UNSPEC_GROUP __IPADDR(0xe0000000) /* 224.0.0.0 */ 143 #define INADDR_ALLHOSTS_GROUP __IPADDR(0xe0000001) /* 224.0.0.1 */ 144 145 #define IN_LOOPBACKNET 127 /* official! */ 146 147 /* 148 * Socket address, internet style. 149 */ 150 struct sockaddr_in { 151 u_int8_t sin_len; 152 u_int8_t sin_family; 153 u_int16_t sin_port; 154 struct in_addr sin_addr; 155 int8_t sin_zero[8]; 156 }; 157 158 /* 159 * Structure used to describe IP options. 160 * Used to store options internally, to pass them to a process, 161 * or to restore options retrieved earlier. 162 * The ip_dst is used for the first-hop gateway when using a source route 163 * (this gets put into the header proper). 164 */ 165 struct ip_opts { 166 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 167 int8_t ip_opts[40]; /* actually variable in size */ 168 }; 169 170 /* 171 * Options for use with [gs]etsockopt at the IP level. 172 * First word of comment is data type; bool is stored in int. 173 */ 174 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 175 #define IP_HDRINCL 2 /* int; header is included with data */ 176 #define IP_TOS 3 /* int; IP type of service and preced. */ 177 #define IP_TTL 4 /* int; IP time to live */ 178 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 179 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 180 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 181 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 182 #define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */ 183 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 184 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 185 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 186 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 187 188 /* 189 * Defaults and limits for options 190 */ 191 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 192 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 193 #define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 194 195 /* 196 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 197 */ 198 struct ip_mreq { 199 struct in_addr imr_multiaddr; /* IP multicast address of group */ 200 struct in_addr imr_interface; /* local IP address of interface */ 201 }; 202 203 /* 204 * Definitions for inet sysctl operations. 205 * 206 * Third level is protocol number. 207 * Fourth level is desired variable within that protocol. 208 */ 209 #define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 210 211 #define CTL_IPPROTO_NAMES { \ 212 { "ip", CTLTYPE_NODE }, \ 213 { "icmp", CTLTYPE_NODE }, \ 214 { "igmp", CTLTYPE_NODE }, \ 215 { "ggp", CTLTYPE_NODE }, \ 216 { 0, 0 }, \ 217 { 0, 0 }, \ 218 { "tcp", CTLTYPE_NODE }, \ 219 { 0, 0 }, \ 220 { "egp", CTLTYPE_NODE }, \ 221 { 0, 0 }, \ 222 { 0, 0 }, \ 223 { 0, 0 }, \ 224 { "pup", CTLTYPE_NODE }, \ 225 { 0, 0 }, \ 226 { 0, 0 }, \ 227 { 0, 0 }, \ 228 { 0, 0 }, \ 229 { "udp", CTLTYPE_NODE }, \ 230 { 0, 0 }, \ 231 { 0, 0 }, \ 232 { 0, 0 }, \ 233 { 0, 0 }, \ 234 { "idp", CTLTYPE_NODE }, \ 235 } 236 237 /* 238 * Names for IP sysctl objects 239 */ 240 #define IPCTL_FORWARDING 1 /* act as router */ 241 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 242 #define IPCTL_DEFTTL 3 /* default TTL */ 243 #ifdef notyet 244 #define IPCTL_DEFMTU 4 /* default MTU */ 245 #endif 246 #define IPCTL_FORWSRCRT 5 /* allow source-routed packets */ 247 #define IPCTL_DIRECTEDBCAST 6 /* default broadcast behavior */ 248 #define IPCTL_MAXID 7 249 250 #define IPCTL_NAMES { \ 251 { 0, 0 }, \ 252 { "forwarding", CTLTYPE_INT }, \ 253 { "redirect", CTLTYPE_INT }, \ 254 { "ttl", CTLTYPE_INT }, \ 255 { "mtu", CTLTYPE_INT }, \ 256 { "forwsrcrt", CTLTYPE_INT }, \ 257 { "directed-broadcast", CTLTYPE_INT }, \ 258 } 259 260 261 #ifdef _KERNEL 262 extern struct in_addr zeroin_addr; 263 264 int in_broadcast __P((struct in_addr, struct ifnet *)); 265 int in_canforward __P((struct in_addr)); 266 int in_cksum __P((struct mbuf *, int)); 267 int in_localaddr __P((struct in_addr)); 268 void in_socktrim __P((struct sockaddr_in *)); 269 270 #define in_hosteq(s,t) ((s).s_addr == (t).s_addr) 271 #define in_nullhost(x) ((x).s_addr == INADDR_ANY) 272 273 #define satosin(sa) ((struct sockaddr_in *)(sa)) 274 #define sintosa(sin) ((struct sockaddr *)(sin)) 275 #define ifatoia(ifa) ((struct in_ifaddr *)(ifa)) 276 #endif 277 #endif /* !_NETINET_IN_H_ */ 278
Indexes created Sun Sep 21 16:09:51 GMT 2025