in.h revision 1.51
1 /* $NetBSD: in.h,v 1.51 2000/08/28 02:12:22 simonb 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 #include <sys/ansi.h> 47 48 #ifndef sa_family_t 49 typedef __sa_family_t sa_family_t; 50 #define sa_family_t __sa_family_t 51 #endif 52 53 /* 54 * Protocols 55 */ 56 #define IPPROTO_IP 0 /* dummy for IP */ 57 #define IPPROTO_HOPOPTS 0 /* IP6 hop-by-hop options */ 58 #define IPPROTO_ICMP 1 /* control message protocol */ 59 #define IPPROTO_IGMP 2 /* group mgmt protocol */ 60 #define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 61 #define IPPROTO_IPV4 4 /* IP header */ 62 #define IPPROTO_IPIP 4 /* IP inside IP */ 63 #define IPPROTO_TCP 6 /* tcp */ 64 #define IPPROTO_EGP 8 /* exterior gateway protocol */ 65 #define IPPROTO_PUP 12 /* pup */ 66 #define IPPROTO_UDP 17 /* user datagram protocol */ 67 #define IPPROTO_IDP 22 /* xns idp */ 68 #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 69 #define IPPROTO_IPV6 41 /* IP6 header */ 70 #define IPPROTO_ROUTING 43 /* IP6 routing header */ 71 #define IPPROTO_FRAGMENT 44 /* IP6 fragmentation header */ 72 #define IPPROTO_RSVP 46 /* resource reservation */ 73 #define IPPROTO_GRE 47 /* GRE encaps RFC 1701 */ 74 #define IPPROTO_ESP 50 /* encap. security payload */ 75 #define IPPROTO_AH 51 /* authentication header */ 76 #define IPPROTO_MOBILE 55 /* IP Mobility RFC 2004 */ 77 #define IPPROTO_IPV6_ICMP 58 /* IPv6 ICMP */ 78 #define IPPROTO_ICMPV6 58 /* ICMP6 */ 79 #define IPPROTO_NONE 59 /* IP6 no next header */ 80 #define IPPROTO_DSTOPTS 60 /* IP6 destination option */ 81 #define IPPROTO_EON 80 /* ISO cnlp */ 82 #define IPPROTO_ENCAP 98 /* encapsulation header */ 83 #define IPPROTO_PIM 103 /* Protocol indep. multicast */ 84 #define IPPROTO_IPCOMP 108 /* IP Payload Comp. Protocol */ 85 86 #define IPPROTO_RAW 255 /* raw IP packet */ 87 #define IPPROTO_MAX 256 88 89 /* last return value of *_input(), meaning "all job for this pkt is done". */ 90 #define IPPROTO_DONE 257 91 92 93 /* 94 * Local port number conventions: 95 * 96 * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root), 97 * unless a kernel is compiled with IPNOPRIVPORTS defined. 98 * 99 * When a user does a bind(2) or connect(2) with a port number of zero, 100 * a non-conflicting local port address is chosen. 101 * 102 * The default range is IPPORT_ANONMIX to IPPORT_ANONMAX, although 103 * that is settable by sysctl(3); net.inet.ip.anonportmin and 104 * net.inet.ip.anonportmax respectively. 105 * 106 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this 107 * default assignment range. 108 * 109 * The value IP_PORTRANGE_DEFAULT causes the default behavior. 110 * 111 * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT, 112 * and exists only for FreeBSD compatibility purposes. 113 * 114 * The value IP_PORTRANGE_LOW changes the range to the "low" are 115 * that is (by convention) restricted to privileged processes. 116 * This convention is based on "vouchsafe" principles only. 117 * It is only secure if you trust the remote host to restrict these ports. 118 * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX. 119 */ 120 121 #define IPPORT_RESERVED 1024 122 #define IPPORT_ANONMIN 49152 123 #define IPPORT_ANONMAX 65535 124 #define IPPORT_RESERVEDMIN 600 125 #define IPPORT_RESERVEDMAX (IPPORT_RESERVED-1) 126 127 /* 128 * Internet address (a structure for historical reasons) 129 */ 130 struct in_addr { 131 u_int32_t s_addr; 132 } __attribute__((__packed__)); 133 134 /* 135 * Definitions of bits in internet address integers. 136 * On subnets, the decomposition of addresses to host and net parts 137 * is done according to subnet mask, not the masks here. 138 * 139 * By byte-swapping the constants, we avoid ever having to byte-swap IP 140 * addresses inside the kernel. Unfortunately, user-level programs rely 141 * on these macros not doing byte-swapping. 142 */ 143 #ifdef _KERNEL 144 #define __IPADDR(x) ((u_int32_t) htonl((u_int32_t)(x))) 145 #else 146 #define __IPADDR(x) ((u_int32_t)(x)) 147 #endif 148 149 #define IN_CLASSA(i) (((u_int32_t)(i) & __IPADDR(0x80000000)) == \ 150 __IPADDR(0x00000000)) 151 #define IN_CLASSA_NET __IPADDR(0xff000000) 152 #define IN_CLASSA_NSHIFT 24 153 #define IN_CLASSA_HOST __IPADDR(0x00ffffff) 154 #define IN_CLASSA_MAX 128 155 156 #define IN_CLASSB(i) (((u_int32_t)(i) & __IPADDR(0xc0000000)) == \ 157 __IPADDR(0x80000000)) 158 #define IN_CLASSB_NET __IPADDR(0xffff0000) 159 #define IN_CLASSB_NSHIFT 16 160 #define IN_CLASSB_HOST __IPADDR(0x0000ffff) 161 #define IN_CLASSB_MAX 65536 162 163 #define IN_CLASSC(i) (((u_int32_t)(i) & __IPADDR(0xe0000000)) == \ 164 __IPADDR(0xc0000000)) 165 #define IN_CLASSC_NET __IPADDR(0xffffff00) 166 #define IN_CLASSC_NSHIFT 8 167 #define IN_CLASSC_HOST __IPADDR(0x000000ff) 168 169 #define IN_CLASSD(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 170 __IPADDR(0xe0000000)) 171 /* These ones aren't really net and host fields, but routing needn't know. */ 172 #define IN_CLASSD_NET __IPADDR(0xf0000000) 173 #define IN_CLASSD_NSHIFT 28 174 #define IN_CLASSD_HOST __IPADDR(0x0fffffff) 175 #define IN_MULTICAST(i) IN_CLASSD(i) 176 177 #define IN_EXPERIMENTAL(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 178 __IPADDR(0xf0000000)) 179 #define IN_BADCLASS(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 180 __IPADDR(0xf0000000)) 181 182 #define IN_LOCAL_GROUP(i) (((u_int32_t)(i) & __IPADDR(0xffffff00)) == \ 183 __IPADDR(0xe0000000)) 184 185 #define INADDR_ANY __IPADDR(0x00000000) 186 #define INADDR_LOOPBACK __IPADDR(0x7f000001) 187 #define INADDR_BROADCAST __IPADDR(0xffffffff) /* must be masked */ 188 #ifndef _KERNEL 189 #define INADDR_NONE __IPADDR(0xffffffff) /* -1 return */ 190 #endif 191 192 #define INADDR_UNSPEC_GROUP __IPADDR(0xe0000000) /* 224.0.0.0 */ 193 #define INADDR_ALLHOSTS_GROUP __IPADDR(0xe0000001) /* 224.0.0.1 */ 194 #define INADDR_ALLRTRS_GROUP __IPADDR(0xe0000002) /* 224.0.0.2 */ 195 #define INADDR_MAX_LOCAL_GROUP __IPADDR(0xe00000ff) /* 224.0.0.255 */ 196 197 #define IN_LOOPBACKNET 127 /* official! */ 198 199 /* 200 * Socket address, internet style. 201 */ 202 struct sockaddr_in { 203 u_int8_t sin_len; 204 sa_family_t sin_family; 205 u_int16_t sin_port; 206 struct in_addr sin_addr; 207 int8_t sin_zero[8]; 208 }; 209 210 #define INET_ADDRSTRLEN 16 211 212 /* 213 * Structure used to describe IP options. 214 * Used to store options internally, to pass them to a process, 215 * or to restore options retrieved earlier. 216 * The ip_dst is used for the first-hop gateway when using a source route 217 * (this gets put into the header proper). 218 */ 219 struct ip_opts { 220 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 221 int8_t ip_opts[40]; /* actually variable in size */ 222 }; 223 224 /* 225 * Options for use with [gs]etsockopt at the IP level. 226 * First word of comment is data type; bool is stored in int. 227 */ 228 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 229 #define IP_HDRINCL 2 /* int; header is included with data */ 230 #define IP_TOS 3 /* int; IP type of service and preced. */ 231 #define IP_TTL 4 /* int; IP time to live */ 232 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 233 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 234 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 235 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 236 #define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */ 237 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 238 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 239 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 240 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 241 #define IP_PORTRANGE 19 /* int; range to use for ephemeral port */ 242 #define IP_RECVIF 20 /* bool; receive reception if w/dgram */ 243 #define IP_ERRORMTU 21 /* int; get MTU of last xmit = EMSGSIZE */ 244 #if 1 /*IPSEC*/ 245 #define IP_IPSEC_POLICY 22 /* struct; get/set security policy */ 246 #endif 247 248 /* 249 * Defaults and limits for options 250 */ 251 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 252 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 253 #define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 254 255 /* 256 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 257 */ 258 struct ip_mreq { 259 struct in_addr imr_multiaddr; /* IP multicast address of group */ 260 struct in_addr imr_interface; /* local IP address of interface */ 261 }; 262 263 /* 264 * Argument for IP_PORTRANGE: 265 * - which range to search when port is unspecified at bind() or connect() 266 */ 267 #define IP_PORTRANGE_DEFAULT 0 /* default range */ 268 #define IP_PORTRANGE_HIGH 1 /* same as DEFAULT (FreeBSD compat) */ 269 #define IP_PORTRANGE_LOW 2 /* use privileged range */ 270 271 #if !defined(_XOPEN_SOURCE) 272 /* 273 * Definitions for inet sysctl operations. 274 * 275 * Third level is protocol number. 276 * Fourth level is desired variable within that protocol. 277 */ 278 #define IPPROTO_MAXID (IPPROTO_AH + 1) /* don't list to IPPROTO_MAX */ 279 280 #define CTL_IPPROTO_NAMES { \ 281 { "ip", CTLTYPE_NODE }, \ 282 { "icmp", CTLTYPE_NODE }, \ 283 { "igmp", CTLTYPE_NODE }, \ 284 { "ggp", CTLTYPE_NODE }, \ 285 { 0, 0 }, \ 286 { 0, 0 }, \ 287 { "tcp", CTLTYPE_NODE }, \ 288 { 0, 0 }, \ 289 { "egp", CTLTYPE_NODE }, \ 290 { 0, 0 }, \ 291 { 0, 0 }, \ 292 { 0, 0 }, \ 293 { "pup", CTLTYPE_NODE }, \ 294 { 0, 0 }, \ 295 { 0, 0 }, \ 296 { 0, 0 }, \ 297 { 0, 0 }, \ 298 { "udp", CTLTYPE_NODE }, \ 299 { 0, 0 }, \ 300 { 0, 0 }, \ 301 { 0, 0 }, \ 302 { 0, 0 }, \ 303 { "idp", CTLTYPE_NODE }, \ 304 { 0, 0 }, \ 305 { 0, 0 }, \ 306 { 0, 0 }, \ 307 { 0, 0 }, \ 308 { 0, 0 }, \ 309 { 0, 0 }, \ 310 { 0, 0 }, \ 311 { 0, 0 }, \ 312 { 0, 0 }, \ 313 { 0, 0 }, \ 314 { 0, 0 }, \ 315 { 0, 0 }, \ 316 { 0, 0 }, \ 317 { 0, 0 }, \ 318 { 0, 0 }, \ 319 { 0, 0 }, \ 320 { 0, 0 }, \ 321 { 0, 0 }, \ 322 { 0, 0 }, \ 323 { 0, 0 }, \ 324 { 0, 0 }, \ 325 { 0, 0 }, \ 326 { 0, 0 }, \ 327 { 0, 0 }, \ 328 { 0, 0 }, \ 329 { 0, 0 }, \ 330 { 0, 0 }, \ 331 { 0, 0 }, \ 332 { "ipsec", CTLTYPE_NODE }, \ 333 } 334 335 /* 336 * Names for IP sysctl objects 337 */ 338 #define IPCTL_FORWARDING 1 /* act as router */ 339 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 340 #define IPCTL_DEFTTL 3 /* default TTL */ 341 #ifdef notyet 342 #define IPCTL_DEFMTU 4 /* default MTU */ 343 #endif 344 #define IPCTL_FORWSRCRT 5 /* forward source-routed packets */ 345 #define IPCTL_DIRECTEDBCAST 6 /* default broadcast behavior */ 346 #define IPCTL_ALLOWSRCRT 7 /* allow/drop all source-routed pkts */ 347 #define IPCTL_SUBNETSARELOCAL 8 /* treat subnets as local addresses */ 348 #define IPCTL_MTUDISC 9 /* allow path MTU discovery */ 349 #define IPCTL_ANONPORTMIN 10 /* minimum ephemeral port */ 350 #define IPCTL_ANONPORTMAX 11 /* maximum ephemeral port */ 351 #define IPCTL_MTUDISCTIMEOUT 12 /* allow path MTU discovery */ 352 #define IPCTL_MAXFLOWS 13 /* maximum ip flows allowed */ 353 #define IPCTL_HOSTZEROBROADCAST 14 /* is host zero a broadcast addr? */ 354 #define IPCTL_GIF_TTL 15 /* default TTL for gif encap packet */ 355 #define IPCTL_LOWPORTMIN 16 /* minimum reserved port */ 356 #define IPCTL_LOWPORTMAX 17 /* maximum reserved port */ 357 #define IPCTL_MAXID 18 358 359 #define IPCTL_NAMES { \ 360 { 0, 0 }, \ 361 { "forwarding", CTLTYPE_INT }, \ 362 { "redirect", CTLTYPE_INT }, \ 363 { "ttl", CTLTYPE_INT }, \ 364 { "mtu", CTLTYPE_INT }, \ 365 { "forwsrcrt", CTLTYPE_INT }, \ 366 { "directed-broadcast", CTLTYPE_INT }, \ 367 { "allowsrcrt", CTLTYPE_INT }, \ 368 { "subnetsarelocal", CTLTYPE_INT }, \ 369 { "mtudisc", CTLTYPE_INT }, \ 370 { "anonportmin", CTLTYPE_INT }, \ 371 { "anonportmax", CTLTYPE_INT }, \ 372 { "mtudisctimeout", CTLTYPE_INT }, \ 373 { "maxflows", CTLTYPE_INT }, \ 374 { "hostzerobroadcast", CTLTYPE_INT }, \ 375 { "gifttl", CTLTYPE_INT }, \ 376 { "lowportmin", CTLTYPE_INT }, \ 377 { "lowportmax", CTLTYPE_INT }, \ 378 } 379 #endif /* !_XOPEN_SOURCE */ 380 381 /* INET6 stuff */ 382 #define __KAME_NETINET_IN_H_INCLUDED_ 383 #include <netinet6/in6.h> 384 #undef __KAME_NETINET_IN_H_INCLUDED_ 385 386 #ifdef _KERNEL 387 extern struct in_addr zeroin_addr; 388 extern u_char ip_protox[]; 389 390 int in_broadcast __P((struct in_addr, struct ifnet *)); 391 int in_canforward __P((struct in_addr)); 392 int in_cksum __P((struct mbuf *, int)); 393 int in4_cksum __P((struct mbuf *, u_int8_t, int, int)); 394 int in_localaddr __P((struct in_addr)); 395 void in_socktrim __P((struct sockaddr_in *)); 396 397 #define in_hosteq(s,t) ((s).s_addr == (t).s_addr) 398 #define in_nullhost(x) ((x).s_addr == INADDR_ANY) 399 400 #define satosin(sa) ((struct sockaddr_in *)(sa)) 401 #define sintosa(sin) ((struct sockaddr *)(sin)) 402 #define ifatoia(ifa) ((struct in_ifaddr *)(ifa)) 403 #endif /* _KERNEL */ 404 405 #endif /* !_NETINET_IN_H_ */ 406
Indexes created Sun Sep 21 16:09:51 GMT 2025