in.h revision 1.57
1 /* $NetBSD: in.h,v 1.57 2002/05/12 23:04:15 kleink 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 in_addr_t 49 typedef __in_addr_t in_addr_t; 50 #define in_addr_t __in_addr_t 51 #endif 52 53 #ifndef in_port_t 54 typedef __in_port_t in_port_t; 55 #define in_port_t __in_port_t 56 #endif 57 58 #ifndef sa_family_t 59 typedef __sa_family_t sa_family_t; 60 #define sa_family_t __sa_family_t 61 #endif 62 63 /* 64 * Protocols 65 */ 66 #define IPPROTO_IP 0 /* dummy for IP */ 67 #define IPPROTO_HOPOPTS 0 /* IP6 hop-by-hop options */ 68 #define IPPROTO_ICMP 1 /* control message protocol */ 69 #define IPPROTO_IGMP 2 /* group mgmt protocol */ 70 #define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 71 #define IPPROTO_IPV4 4 /* IP header */ 72 #define IPPROTO_IPIP 4 /* IP inside IP */ 73 #define IPPROTO_TCP 6 /* tcp */ 74 #define IPPROTO_EGP 8 /* exterior gateway protocol */ 75 #define IPPROTO_PUP 12 /* pup */ 76 #define IPPROTO_UDP 17 /* user datagram protocol */ 77 #define IPPROTO_IDP 22 /* xns idp */ 78 #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 79 #define IPPROTO_IPV6 41 /* IP6 header */ 80 #define IPPROTO_ROUTING 43 /* IP6 routing header */ 81 #define IPPROTO_FRAGMENT 44 /* IP6 fragmentation header */ 82 #define IPPROTO_RSVP 46 /* resource reservation */ 83 #define IPPROTO_GRE 47 /* GRE encaps RFC 1701 */ 84 #define IPPROTO_ESP 50 /* encap. security payload */ 85 #define IPPROTO_AH 51 /* authentication header */ 86 #define IPPROTO_MOBILE 55 /* IP Mobility RFC 2004 */ 87 #define IPPROTO_IPV6_ICMP 58 /* IPv6 ICMP */ 88 #define IPPROTO_ICMPV6 58 /* ICMP6 */ 89 #define IPPROTO_NONE 59 /* IP6 no next header */ 90 #define IPPROTO_DSTOPTS 60 /* IP6 destination option */ 91 #define IPPROTO_EON 80 /* ISO cnlp */ 92 #define IPPROTO_ENCAP 98 /* encapsulation header */ 93 #define IPPROTO_PIM 103 /* Protocol indep. multicast */ 94 #define IPPROTO_IPCOMP 108 /* IP Payload Comp. Protocol */ 95 #define IPPROTO_VRRP 112 /* VRRP RFC 2338 */ 96 97 #define IPPROTO_RAW 255 /* raw IP packet */ 98 #define IPPROTO_MAX 256 99 100 /* last return value of *_input(), meaning "all job for this pkt is done". */ 101 #define IPPROTO_DONE 257 102 103 104 /* 105 * Local port number conventions: 106 * 107 * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root), 108 * unless a kernel is compiled with IPNOPRIVPORTS defined. 109 * 110 * When a user does a bind(2) or connect(2) with a port number of zero, 111 * a non-conflicting local port address is chosen. 112 * 113 * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although 114 * that is settable by sysctl(3); net.inet.ip.anonportmin and 115 * net.inet.ip.anonportmax respectively. 116 * 117 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this 118 * default assignment range. 119 * 120 * The value IP_PORTRANGE_DEFAULT causes the default behavior. 121 * 122 * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT, 123 * and exists only for FreeBSD compatibility purposes. 124 * 125 * The value IP_PORTRANGE_LOW changes the range to the "low" are 126 * that is (by convention) restricted to privileged processes. 127 * This convention is based on "vouchsafe" principles only. 128 * It is only secure if you trust the remote host to restrict these ports. 129 * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX. 130 */ 131 132 #define IPPORT_RESERVED 1024 133 #define IPPORT_ANONMIN 49152 134 #define IPPORT_ANONMAX 65535 135 #define IPPORT_RESERVEDMIN 600 136 #define IPPORT_RESERVEDMAX (IPPORT_RESERVED-1) 137 138 /* 139 * Internet address (a structure for historical reasons) 140 */ 141 struct in_addr { 142 in_addr_t s_addr; 143 } __attribute__((__packed__)); 144 145 /* 146 * Definitions of bits in internet address integers. 147 * On subnets, the decomposition of addresses to host and net parts 148 * is done according to subnet mask, not the masks here. 149 * 150 * By byte-swapping the constants, we avoid ever having to byte-swap IP 151 * addresses inside the kernel. Unfortunately, user-level programs rely 152 * on these macros not doing byte-swapping. 153 */ 154 #ifdef _KERNEL 155 #define __IPADDR(x) ((u_int32_t) htonl((u_int32_t)(x))) 156 #else 157 #define __IPADDR(x) ((u_int32_t)(x)) 158 #endif 159 160 #define IN_CLASSA(i) (((u_int32_t)(i) & __IPADDR(0x80000000)) == \ 161 __IPADDR(0x00000000)) 162 #define IN_CLASSA_NET __IPADDR(0xff000000) 163 #define IN_CLASSA_NSHIFT 24 164 #define IN_CLASSA_HOST __IPADDR(0x00ffffff) 165 #define IN_CLASSA_MAX 128 166 167 #define IN_CLASSB(i) (((u_int32_t)(i) & __IPADDR(0xc0000000)) == \ 168 __IPADDR(0x80000000)) 169 #define IN_CLASSB_NET __IPADDR(0xffff0000) 170 #define IN_CLASSB_NSHIFT 16 171 #define IN_CLASSB_HOST __IPADDR(0x0000ffff) 172 #define IN_CLASSB_MAX 65536 173 174 #define IN_CLASSC(i) (((u_int32_t)(i) & __IPADDR(0xe0000000)) == \ 175 __IPADDR(0xc0000000)) 176 #define IN_CLASSC_NET __IPADDR(0xffffff00) 177 #define IN_CLASSC_NSHIFT 8 178 #define IN_CLASSC_HOST __IPADDR(0x000000ff) 179 180 #define IN_CLASSD(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 181 __IPADDR(0xe0000000)) 182 /* These ones aren't really net and host fields, but routing needn't know. */ 183 #define IN_CLASSD_NET __IPADDR(0xf0000000) 184 #define IN_CLASSD_NSHIFT 28 185 #define IN_CLASSD_HOST __IPADDR(0x0fffffff) 186 #define IN_MULTICAST(i) IN_CLASSD(i) 187 188 #define IN_EXPERIMENTAL(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 189 __IPADDR(0xf0000000)) 190 #define IN_BADCLASS(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 191 __IPADDR(0xf0000000)) 192 193 #define IN_LOCAL_GROUP(i) (((u_int32_t)(i) & __IPADDR(0xffffff00)) == \ 194 __IPADDR(0xe0000000)) 195 196 #define INADDR_ANY __IPADDR(0x00000000) 197 #define INADDR_LOOPBACK __IPADDR(0x7f000001) 198 #define INADDR_BROADCAST __IPADDR(0xffffffff) /* must be masked */ 199 #ifndef _KERNEL 200 #define INADDR_NONE __IPADDR(0xffffffff) /* -1 return */ 201 #endif 202 203 #define INADDR_UNSPEC_GROUP __IPADDR(0xe0000000) /* 224.0.0.0 */ 204 #define INADDR_ALLHOSTS_GROUP __IPADDR(0xe0000001) /* 224.0.0.1 */ 205 #define INADDR_ALLRTRS_GROUP __IPADDR(0xe0000002) /* 224.0.0.2 */ 206 #define INADDR_MAX_LOCAL_GROUP __IPADDR(0xe00000ff) /* 224.0.0.255 */ 207 208 #define IN_LOOPBACKNET 127 /* official! */ 209 210 /* 211 * Socket address, internet style. 212 */ 213 struct sockaddr_in { 214 u_int8_t sin_len; 215 sa_family_t sin_family; 216 in_port_t sin_port; 217 struct in_addr sin_addr; 218 int8_t sin_zero[8]; 219 }; 220 221 #define INET_ADDRSTRLEN 16 222 223 /* 224 * Structure used to describe IP options. 225 * Used to store options internally, to pass them to a process, 226 * or to restore options retrieved earlier. 227 * The ip_dst is used for the first-hop gateway when using a source route 228 * (this gets put into the header proper). 229 */ 230 struct ip_opts { 231 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 232 int8_t ip_opts[40]; /* actually variable in size */ 233 }; 234 235 /* 236 * Options for use with [gs]etsockopt at the IP level. 237 * First word of comment is data type; bool is stored in int. 238 */ 239 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 240 #define IP_HDRINCL 2 /* int; header is included with data */ 241 #define IP_TOS 3 /* int; IP type of service and preced. */ 242 #define IP_TTL 4 /* int; IP time to live */ 243 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 244 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 245 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 246 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 247 #define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */ 248 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 249 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 250 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 251 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 252 #define IP_PORTRANGE 19 /* int; range to use for ephemeral port */ 253 #define IP_RECVIF 20 /* bool; receive reception if w/dgram */ 254 #define IP_ERRORMTU 21 /* int; get MTU of last xmit = EMSGSIZE */ 255 #if 1 /*IPSEC*/ 256 #define IP_IPSEC_POLICY 22 /* struct; get/set security policy */ 257 #endif 258 259 /* 260 * Defaults and limits for options 261 */ 262 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 263 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 264 #define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 265 266 /* 267 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 268 */ 269 struct ip_mreq { 270 struct in_addr imr_multiaddr; /* IP multicast address of group */ 271 struct in_addr imr_interface; /* local IP address of interface */ 272 }; 273 274 /* 275 * Argument for IP_PORTRANGE: 276 * - which range to search when port is unspecified at bind() or connect() 277 */ 278 #define IP_PORTRANGE_DEFAULT 0 /* default range */ 279 #define IP_PORTRANGE_HIGH 1 /* same as DEFAULT (FreeBSD compat) */ 280 #define IP_PORTRANGE_LOW 2 /* use privileged range */ 281 282 #if !defined(_XOPEN_SOURCE) 283 /* 284 * Definitions for inet sysctl operations. 285 * 286 * Third level is protocol number. 287 * Fourth level is desired variable within that protocol. 288 */ 289 #define IPPROTO_MAXID (IPPROTO_AH + 1) /* don't list to IPPROTO_MAX */ 290 291 #define CTL_IPPROTO_NAMES { \ 292 { "ip", CTLTYPE_NODE }, \ 293 { "icmp", CTLTYPE_NODE }, \ 294 { "igmp", CTLTYPE_NODE }, \ 295 { "ggp", CTLTYPE_NODE }, \ 296 { 0, 0 }, \ 297 { 0, 0 }, \ 298 { "tcp", CTLTYPE_NODE }, \ 299 { 0, 0 }, \ 300 { "egp", CTLTYPE_NODE }, \ 301 { 0, 0 }, \ 302 { 0, 0 }, \ 303 { 0, 0 }, \ 304 { "pup", CTLTYPE_NODE }, \ 305 { 0, 0 }, \ 306 { 0, 0 }, \ 307 { 0, 0 }, \ 308 { 0, 0 }, \ 309 { "udp", CTLTYPE_NODE }, \ 310 { 0, 0 }, \ 311 { 0, 0 }, \ 312 { 0, 0 }, \ 313 { 0, 0 }, \ 314 { "idp", CTLTYPE_NODE }, \ 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 { 0, 0 }, \ 333 { 0, 0 }, \ 334 { 0, 0 }, \ 335 { 0, 0 }, \ 336 { 0, 0 }, \ 337 { 0, 0 }, \ 338 { 0, 0 }, \ 339 { 0, 0 }, \ 340 { 0, 0 }, \ 341 { 0, 0 }, \ 342 { 0, 0 }, \ 343 { "ipsec", CTLTYPE_NODE }, \ 344 } 345 346 /* 347 * Names for IP sysctl objects 348 */ 349 #define IPCTL_FORWARDING 1 /* act as router */ 350 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 351 #define IPCTL_DEFTTL 3 /* default TTL */ 352 #ifdef notyet 353 #define IPCTL_DEFMTU 4 /* default MTU */ 354 #endif 355 #define IPCTL_FORWSRCRT 5 /* forward source-routed packets */ 356 #define IPCTL_DIRECTEDBCAST 6 /* default broadcast behavior */ 357 #define IPCTL_ALLOWSRCRT 7 /* allow/drop all source-routed pkts */ 358 #define IPCTL_SUBNETSARELOCAL 8 /* treat subnets as local addresses */ 359 #define IPCTL_MTUDISC 9 /* allow path MTU discovery */ 360 #define IPCTL_ANONPORTMIN 10 /* minimum ephemeral port */ 361 #define IPCTL_ANONPORTMAX 11 /* maximum ephemeral port */ 362 #define IPCTL_MTUDISCTIMEOUT 12 /* allow path MTU discovery */ 363 #define IPCTL_MAXFLOWS 13 /* maximum ip flows allowed */ 364 #define IPCTL_HOSTZEROBROADCAST 14 /* is host zero a broadcast addr? */ 365 #define IPCTL_GIF_TTL 15 /* default TTL for gif encap packet */ 366 #define IPCTL_LOWPORTMIN 16 /* minimum reserved port */ 367 #define IPCTL_LOWPORTMAX 17 /* maximum reserved port */ 368 #define IPCTL_MAXFRAGPACKETS 18 /* max packets reassembly queue */ 369 #define IPCTL_GRE_TTL 19 /* default TTL for gre encap packet */ 370 #define IPCTL_MAXID 20 371 372 #define IPCTL_NAMES { \ 373 { 0, 0 }, \ 374 { "forwarding", CTLTYPE_INT }, \ 375 { "redirect", CTLTYPE_INT }, \ 376 { "ttl", CTLTYPE_INT }, \ 377 { "mtu", CTLTYPE_INT }, \ 378 { "forwsrcrt", CTLTYPE_INT }, \ 379 { "directed-broadcast", CTLTYPE_INT }, \ 380 { "allowsrcrt", CTLTYPE_INT }, \ 381 { "subnetsarelocal", CTLTYPE_INT }, \ 382 { "mtudisc", CTLTYPE_INT }, \ 383 { "anonportmin", CTLTYPE_INT }, \ 384 { "anonportmax", CTLTYPE_INT }, \ 385 { "mtudisctimeout", CTLTYPE_INT }, \ 386 { "maxflows", CTLTYPE_INT }, \ 387 { "hostzerobroadcast", CTLTYPE_INT }, \ 388 { "gifttl", CTLTYPE_INT }, \ 389 { "lowportmin", CTLTYPE_INT }, \ 390 { "lowportmax", CTLTYPE_INT }, \ 391 { "maxfragpackets", CTLTYPE_INT }, \ 392 { "grettl", CTLTYPE_INT }, \ 393 } 394 #endif /* !_XOPEN_SOURCE */ 395 396 /* INET6 stuff */ 397 #define __KAME_NETINET_IN_H_INCLUDED_ 398 #include <netinet6/in6.h> 399 #undef __KAME_NETINET_IN_H_INCLUDED_ 400 401 #ifdef _KERNEL 402 /* 403 * in_cksum_phdr: 404 * 405 * Compute significant parts of the IPv4 checksum pseudo-header 406 * for use in a delayed TCP/UDP checksum calculation. 407 * 408 * Args: 409 * 410 * src Source IP address 411 * dst Destination IP address 412 * lenproto htons(proto-hdr-len + proto-number) 413 */ 414 static __inline u_int16_t __attribute__((__unused__)) 415 in_cksum_phdr(u_int32_t src, u_int32_t dst, u_int32_t lenproto) 416 { 417 u_int32_t sum; 418 419 sum = lenproto + 420 (u_int16_t)(src >> 16) + 421 (u_int16_t)(src /*& 0xffff*/) + 422 (u_int16_t)(dst >> 16) + 423 (u_int16_t)(dst /*& 0xffff*/); 424 425 sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/); 426 427 if (sum > 0xffff) 428 sum -= 0xffff; 429 430 return (sum); 431 } 432 433 /* 434 * in_cksum_addword: 435 * 436 * Add the two 16-bit network-order values, carry, and return. 437 */ 438 static __inline u_int16_t __attribute__((__unused__)) 439 in_cksum_addword(u_int16_t a, u_int16_t b) 440 { 441 u_int32_t sum = a + b; 442 443 if (sum > 0xffff) 444 sum -= 0xffff; 445 446 return (sum); 447 } 448 449 extern struct in_addr zeroin_addr; 450 extern u_char ip_protox[]; 451 452 int in_broadcast __P((struct in_addr, struct ifnet *)); 453 int in_canforward __P((struct in_addr)); 454 int in_cksum __P((struct mbuf *, int)); 455 int in4_cksum __P((struct mbuf *, u_int8_t, int, int)); 456 void in_delayed_cksum __P((struct mbuf *)); 457 int in_localaddr __P((struct in_addr)); 458 void in_socktrim __P((struct sockaddr_in *)); 459 460 #define in_hosteq(s,t) ((s).s_addr == (t).s_addr) 461 #define in_nullhost(x) ((x).s_addr == INADDR_ANY) 462 463 #define satosin(sa) ((struct sockaddr_in *)(sa)) 464 #define sintosa(sin) ((struct sockaddr *)(sin)) 465 #define ifatoia(ifa) ((struct in_ifaddr *)(ifa)) 466 #endif /* _KERNEL */ 467 468 #endif /* !_NETINET_IN_H_ */ 469
Indexes created Fri Sep 26 08:10:20 GMT 2025