in.h revision 1.29
1 /* $NetBSD: in.h,v 1.29 1997/12/16 00:02:05 thorpej 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_ESP 50 /* encap. security payload */ 61 #define IPPROTO_AH 51 /* authentication header */ 62 #define IPPROTO_EON 80 /* ISO cnlp */ 63 #define IPPROTO_ENCAP 98 /* encapsulation header */ 64 65 #define IPPROTO_RAW 255 /* raw IP packet */ 66 #define IPPROTO_MAX 256 67 68 69 /* 70 * Local port number conventions: 71 * Ports < IPPORT_RESERVED are reserved for 72 * privileged processes (e.g. root). 73 * Ports > IPPORT_USERRESERVED are reserved 74 * for servers, not necessarily privileged. 75 */ 76 #define IPPORT_RESERVED 1024 77 #define IPPORT_USERRESERVED 5000 78 79 /* 80 * Internet address (a structure for historical reasons) 81 */ 82 struct in_addr { 83 u_int32_t s_addr; 84 }; 85 86 /* 87 * Definitions of bits in internet address integers. 88 * On subnets, the decomposition of addresses to host and net parts 89 * is done according to subnet mask, not the masks here. 90 * 91 * By byte-swapping the constants, we avoid ever having to byte-swap IP 92 * addresses inside the kernel. Unfortunately, user-level programs rely 93 * on these macros not doing byte-swapping. 94 */ 95 #ifdef _KERNEL 96 #define __IPADDR(x) ((u_int32_t) htonl((u_int32_t)(x))) 97 #else 98 #define __IPADDR(x) ((u_int32_t)(x)) 99 #endif 100 101 #define IN_CLASSA(i) (((u_int32_t)(i) & __IPADDR(0x80000000)) == \ 102 __IPADDR(0x00000000)) 103 #define IN_CLASSA_NET __IPADDR(0xff000000) 104 #define IN_CLASSA_NSHIFT 24 105 #define IN_CLASSA_HOST __IPADDR(0x00ffffff) 106 #define IN_CLASSA_MAX 128 107 108 #define IN_CLASSB(i) (((u_int32_t)(i) & __IPADDR(0xc0000000)) == \ 109 __IPADDR(0x80000000)) 110 #define IN_CLASSB_NET __IPADDR(0xffff0000) 111 #define IN_CLASSB_NSHIFT 16 112 #define IN_CLASSB_HOST __IPADDR(0x0000ffff) 113 #define IN_CLASSB_MAX 65536 114 115 #define IN_CLASSC(i) (((u_int32_t)(i) & __IPADDR(0xe0000000)) == \ 116 __IPADDR(0xc0000000)) 117 #define IN_CLASSC_NET __IPADDR(0xffffff00) 118 #define IN_CLASSC_NSHIFT 8 119 #define IN_CLASSC_HOST __IPADDR(0x000000ff) 120 121 #define IN_CLASSD(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 122 __IPADDR(0xe0000000)) 123 /* These ones aren't really net and host fields, but routing needn't know. */ 124 #define IN_CLASSD_NET __IPADDR(0xf0000000) 125 #define IN_CLASSD_NSHIFT 28 126 #define IN_CLASSD_HOST __IPADDR(0x0fffffff) 127 #define IN_MULTICAST(i) IN_CLASSD(i) 128 129 #define IN_EXPERIMENTAL(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 130 __IPADDR(0xf0000000)) 131 #define IN_BADCLASS(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 132 __IPADDR(0xf0000000)) 133 134 #define IN_LOCAL_GROUP(i) (((u_int32_t)(i) & __IPADDR(0xffffff00)) == \ 135 __IPADDR(0xe0000000)) 136 137 #define INADDR_ANY __IPADDR(0x00000000) 138 #define INADDR_LOOPBACK __IPADDR(0x7f000001) 139 #define INADDR_BROADCAST __IPADDR(0xffffffff) /* must be masked */ 140 #ifndef _KERNEL 141 #define INADDR_NONE __IPADDR(0xffffffff) /* -1 return */ 142 #endif 143 144 #define INADDR_UNSPEC_GROUP __IPADDR(0xe0000000) /* 224.0.0.0 */ 145 #define INADDR_ALLHOSTS_GROUP __IPADDR(0xe0000001) /* 224.0.0.1 */ 146 #define INADDR_ALLRTRS_GROUP __IPADDR(0xe0000002) /* 224.0.0.2 */ 147 #define INADDR_MAX_LOCAL_GROUP __IPADDR(0xe00000ff) /* 224.0.0.255 */ 148 149 #define IN_LOOPBACKNET 127 /* official! */ 150 151 /* 152 * Socket address, internet style. 153 */ 154 struct sockaddr_in { 155 u_int8_t sin_len; 156 u_int8_t sin_family; 157 u_int16_t sin_port; 158 struct in_addr sin_addr; 159 int8_t sin_zero[8]; 160 }; 161 162 /* 163 * Structure used to describe IP options. 164 * Used to store options internally, to pass them to a process, 165 * or to restore options retrieved earlier. 166 * The ip_dst is used for the first-hop gateway when using a source route 167 * (this gets put into the header proper). 168 */ 169 struct ip_opts { 170 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 171 int8_t ip_opts[40]; /* actually variable in size */ 172 }; 173 174 /* 175 * Options for use with [gs]etsockopt at the IP level. 176 * First word of comment is data type; bool is stored in int. 177 */ 178 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 179 #define IP_HDRINCL 2 /* int; header is included with data */ 180 #define IP_TOS 3 /* int; IP type of service and preced. */ 181 #define IP_TTL 4 /* int; IP time to live */ 182 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 183 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 184 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 185 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 186 #define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */ 187 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 188 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 189 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 190 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 191 #define IP_RECVIF 20 /* bool; receive reception if w/dgram */ 192 #define IP_ERRORMTU 21 /* int; get MTU of last xmit = EMSGSIZE */ 193 194 /* 195 * Defaults and limits for options 196 */ 197 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 198 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 199 #define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 200 201 /* 202 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 203 */ 204 struct ip_mreq { 205 struct in_addr imr_multiaddr; /* IP multicast address of group */ 206 struct in_addr imr_interface; /* local IP address of interface */ 207 }; 208 209 /* 210 * Definitions for inet sysctl operations. 211 * 212 * Third level is protocol number. 213 * Fourth level is desired variable within that protocol. 214 */ 215 #define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 216 217 #define CTL_IPPROTO_NAMES { \ 218 { "ip", CTLTYPE_NODE }, \ 219 { "icmp", CTLTYPE_NODE }, \ 220 { "igmp", CTLTYPE_NODE }, \ 221 { "ggp", CTLTYPE_NODE }, \ 222 { 0, 0 }, \ 223 { 0, 0 }, \ 224 { "tcp", CTLTYPE_NODE }, \ 225 { 0, 0 }, \ 226 { "egp", CTLTYPE_NODE }, \ 227 { 0, 0 }, \ 228 { 0, 0 }, \ 229 { 0, 0 }, \ 230 { "pup", CTLTYPE_NODE }, \ 231 { 0, 0 }, \ 232 { 0, 0 }, \ 233 { 0, 0 }, \ 234 { 0, 0 }, \ 235 { "udp", CTLTYPE_NODE }, \ 236 { 0, 0 }, \ 237 { 0, 0 }, \ 238 { 0, 0 }, \ 239 { 0, 0 }, \ 240 { "idp", CTLTYPE_NODE }, \ 241 } 242 243 /* 244 * Names for IP sysctl objects 245 */ 246 #define IPCTL_FORWARDING 1 /* act as router */ 247 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 248 #define IPCTL_DEFTTL 3 /* default TTL */ 249 #ifdef notyet 250 #define IPCTL_DEFMTU 4 /* default MTU */ 251 #endif 252 #define IPCTL_FORWSRCRT 5 /* forward source-routed packets */ 253 #define IPCTL_DIRECTEDBCAST 6 /* default broadcast behavior */ 254 #define IPCTL_ALLOWSRCRT 7 /* allow/drop all source-routed pkts */ 255 #define IPCTL_SUBNETSARELOCAL 8 /* treat subnets as local addresses */ 256 #define IPCTL_MTUDISC 9 /* allow path MTU discovery */ 257 #define IPCTL_MAXID 10 258 259 #define IPCTL_NAMES { \ 260 { 0, 0 }, \ 261 { "forwarding", CTLTYPE_INT }, \ 262 { "redirect", CTLTYPE_INT }, \ 263 { "ttl", CTLTYPE_INT }, \ 264 { "mtu", CTLTYPE_INT }, \ 265 { "forwsrcrt", CTLTYPE_INT }, \ 266 { "directed-broadcast", CTLTYPE_INT }, \ 267 { "allowsrcrt", CTLTYPE_INT }, \ 268 { "subnetsarelocal", CTLTYPE_INT }, \ 269 { "mtudisc", CTLTYPE_INT }, \ 270 } 271 272 273 #ifdef _KERNEL 274 extern struct in_addr zeroin_addr; 275 276 int in_broadcast __P((struct in_addr, struct ifnet *)); 277 int in_canforward __P((struct in_addr)); 278 int in_cksum __P((struct mbuf *, int)); 279 int in_localaddr __P((struct in_addr)); 280 void in_socktrim __P((struct sockaddr_in *)); 281 282 #define in_hosteq(s,t) ((s).s_addr == (t).s_addr) 283 #define in_nullhost(x) ((x).s_addr == INADDR_ANY) 284 285 #define satosin(sa) ((struct sockaddr_in *)(sa)) 286 #define sintosa(sin) ((struct sockaddr *)(sin)) 287 #define ifatoia(ifa) ((struct in_ifaddr *)(ifa)) 288 #endif 289 #endif /* !_NETINET_IN_H_ */ 290
Indexes created Tue Sep 23 07:09:52 GMT 2025