in.h revision 1.46
1 /* $NetBSD: in.h,v 1.46 2000/02/17 10:59:35 darrenr 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_HOPOPTS 0 /* IP6 hop-by-hop options */ 51 #define IPPROTO_ICMP 1 /* control message protocol */ 52 #define IPPROTO_IGMP 2 /* group mgmt protocol */ 53 #define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 54 #define IPPROTO_IPV4 4 /* IP header */ 55 #define IPPROTO_IPIP 4 /* IP inside IP */ 56 #define IPPROTO_TCP 6 /* tcp */ 57 #define IPPROTO_EGP 8 /* exterior gateway protocol */ 58 #define IPPROTO_PUP 12 /* pup */ 59 #define IPPROTO_UDP 17 /* user datagram protocol */ 60 #define IPPROTO_IDP 22 /* xns idp */ 61 #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 62 #define IPPROTO_IPV6 41 /* IP6 header */ 63 #define IPPROTO_ROUTING 43 /* IP6 routing header */ 64 #define IPPROTO_FRAGMENT 44 /* IP6 fragmentation header */ 65 #define IPPROTO_RSVP 46 /* resource reservation */ 66 #define IPPROTO_GRE 47 /* GRE encaps RFC 1701 */ 67 #define IPPROTO_ESP 50 /* encap. security payload */ 68 #define IPPROTO_AH 51 /* authentication header */ 69 #define IPPROTO_MOBILE 55 /* IP Mobility RFC 2004 */ 70 #define IPPROTO_IPV6_ICMP 58 /* IPv6 ICMP */ 71 #define IPPROTO_ICMPV6 58 /* ICMP6 */ 72 #define IPPROTO_NONE 59 /* IP6 no next header */ 73 #define IPPROTO_DSTOPTS 60 /* IP6 destination option */ 74 #define IPPROTO_EON 80 /* ISO cnlp */ 75 #define IPPROTO_ENCAP 98 /* encapsulation header */ 76 #define IPPROTO_PIM 103 /* Protocol indep. multicast */ 77 #define IPPROTO_IPCOMP 108 /* IP Payload Comp. Protocol */ 78 79 #define IPPROTO_RAW 255 /* raw IP packet */ 80 #define IPPROTO_MAX 256 81 82 83 /* 84 * Local port number conventions: 85 * 86 * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root), 87 * unless a kernel is compiled with IPNOPRIVPORTS defined. 88 * 89 * When a user does a bind(2) or connect(2) with a port number of zero, 90 * a non-conflicting local port address is chosen. 91 * 92 * The default range is IPPORT_ANONMIX to IPPORT_ANONMAX, although 93 * that is settable by sysctl(3); net.inet.ip.anonportmin and 94 * net.inet.ip.anonportmax respectively. 95 * 96 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this 97 * default assignment range. 98 * 99 * The value IP_PORTRANGE_DEFAULT causes the default behavior. 100 * 101 * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT, 102 * and exists only for FreeBSD compatibility purposes. 103 * 104 * The value IP_PORTRANGE_LOW changes the range to the "low" are 105 * that is (by convention) restricted to privileged processes. 106 * This convention is based on "vouchsafe" principles only. 107 * It is only secure if you trust the remote host to restrict these ports. 108 * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX. 109 */ 110 111 #define IPPORT_RESERVED 1024 112 #define IPPORT_ANONMIN 49152 113 #define IPPORT_ANONMAX 65535 114 #define IPPORT_RESERVEDMIN 600 115 #define IPPORT_RESERVEDMAX (IPPORT_RESERVED-1) 116 117 /* 118 * Internet address (a structure for historical reasons) 119 */ 120 struct in_addr { 121 u_int32_t s_addr; 122 } __attribute__((__packed__)); 123 124 /* 125 * Definitions of bits in internet address integers. 126 * On subnets, the decomposition of addresses to host and net parts 127 * is done according to subnet mask, not the masks here. 128 * 129 * By byte-swapping the constants, we avoid ever having to byte-swap IP 130 * addresses inside the kernel. Unfortunately, user-level programs rely 131 * on these macros not doing byte-swapping. 132 */ 133 #ifdef _KERNEL 134 #define __IPADDR(x) ((u_int32_t) htonl((u_int32_t)(x))) 135 #else 136 #define __IPADDR(x) ((u_int32_t)(x)) 137 #endif 138 139 #define IN_CLASSA(i) (((u_int32_t)(i) & __IPADDR(0x80000000)) == \ 140 __IPADDR(0x00000000)) 141 #define IN_CLASSA_NET __IPADDR(0xff000000) 142 #define IN_CLASSA_NSHIFT 24 143 #define IN_CLASSA_HOST __IPADDR(0x00ffffff) 144 #define IN_CLASSA_MAX 128 145 146 #define IN_CLASSB(i) (((u_int32_t)(i) & __IPADDR(0xc0000000)) == \ 147 __IPADDR(0x80000000)) 148 #define IN_CLASSB_NET __IPADDR(0xffff0000) 149 #define IN_CLASSB_NSHIFT 16 150 #define IN_CLASSB_HOST __IPADDR(0x0000ffff) 151 #define IN_CLASSB_MAX 65536 152 153 #define IN_CLASSC(i) (((u_int32_t)(i) & __IPADDR(0xe0000000)) == \ 154 __IPADDR(0xc0000000)) 155 #define IN_CLASSC_NET __IPADDR(0xffffff00) 156 #define IN_CLASSC_NSHIFT 8 157 #define IN_CLASSC_HOST __IPADDR(0x000000ff) 158 159 #define IN_CLASSD(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 160 __IPADDR(0xe0000000)) 161 /* These ones aren't really net and host fields, but routing needn't know. */ 162 #define IN_CLASSD_NET __IPADDR(0xf0000000) 163 #define IN_CLASSD_NSHIFT 28 164 #define IN_CLASSD_HOST __IPADDR(0x0fffffff) 165 #define IN_MULTICAST(i) IN_CLASSD(i) 166 167 #define IN_EXPERIMENTAL(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 168 __IPADDR(0xf0000000)) 169 #define IN_BADCLASS(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \ 170 __IPADDR(0xf0000000)) 171 172 #define IN_LOCAL_GROUP(i) (((u_int32_t)(i) & __IPADDR(0xffffff00)) == \ 173 __IPADDR(0xe0000000)) 174 175 #define INADDR_ANY __IPADDR(0x00000000) 176 #define INADDR_LOOPBACK __IPADDR(0x7f000001) 177 #define INADDR_BROADCAST __IPADDR(0xffffffff) /* must be masked */ 178 #ifndef _KERNEL 179 #define INADDR_NONE __IPADDR(0xffffffff) /* -1 return */ 180 #endif 181 182 #define INADDR_UNSPEC_GROUP __IPADDR(0xe0000000) /* 224.0.0.0 */ 183 #define INADDR_ALLHOSTS_GROUP __IPADDR(0xe0000001) /* 224.0.0.1 */ 184 #define INADDR_ALLRTRS_GROUP __IPADDR(0xe0000002) /* 224.0.0.2 */ 185 #define INADDR_MAX_LOCAL_GROUP __IPADDR(0xe00000ff) /* 224.0.0.255 */ 186 187 #define IN_LOOPBACKNET 127 /* official! */ 188 189 /* last return value of *_input(), meaning "all job for this pkt is done". */ 190 #define IPPROTO_DONE 257 191 192 /* 193 * Socket address, internet style. 194 */ 195 struct sockaddr_in { 196 u_int8_t sin_len; 197 u_int8_t sin_family; 198 u_int16_t sin_port; 199 struct in_addr sin_addr; 200 int8_t sin_zero[8]; 201 }; 202 203 #define INET_ADDRSTRLEN 16 204 205 /* 206 * Structure used to describe IP options. 207 * Used to store options internally, to pass them to a process, 208 * or to restore options retrieved earlier. 209 * The ip_dst is used for the first-hop gateway when using a source route 210 * (this gets put into the header proper). 211 */ 212 struct ip_opts { 213 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 214 int8_t ip_opts[40]; /* actually variable in size */ 215 }; 216 217 /* 218 * Options for use with [gs]etsockopt at the IP level. 219 * First word of comment is data type; bool is stored in int. 220 */ 221 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 222 #define IP_HDRINCL 2 /* int; header is included with data */ 223 #define IP_TOS 3 /* int; IP type of service and preced. */ 224 #define IP_TTL 4 /* int; IP time to live */ 225 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 226 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 227 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 228 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 229 #define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */ 230 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 231 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 232 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 233 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 234 #define IP_PORTRANGE 19 /* int; range to use for ephemeral port */ 235 #define IP_RECVIF 20 /* bool; receive reception if w/dgram */ 236 #define IP_ERRORMTU 21 /* int; get MTU of last xmit = EMSGSIZE */ 237 #if 1 /*IPSEC*/ 238 #define IP_IPSEC_POLICY 22 /* struct; get/set security policy */ 239 #endif 240 241 /* 242 * Defaults and limits for options 243 */ 244 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 245 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 246 #define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 247 248 /* 249 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 250 */ 251 struct ip_mreq { 252 struct in_addr imr_multiaddr; /* IP multicast address of group */ 253 struct in_addr imr_interface; /* local IP address of interface */ 254 }; 255 256 /* 257 * Argument for IP_PORTRANGE: 258 * - which range to search when port is unspecified at bind() or connect() 259 */ 260 #define IP_PORTRANGE_DEFAULT 0 /* default range */ 261 #define IP_PORTRANGE_HIGH 1 /* same as DEFAULT (FreeBSD compat) */ 262 #define IP_PORTRANGE_LOW 2 /* use privileged range */ 263 264 #if !defined(_XOPEN_SOURCE) 265 /* 266 * Definitions for inet sysctl operations. 267 * 268 * Third level is protocol number. 269 * Fourth level is desired variable within that protocol. 270 */ 271 #define IPPROTO_MAXID (IPPROTO_AH + 1) /* don't list to IPPROTO_MAX */ 272 273 #define CTL_IPPROTO_NAMES { \ 274 { "ip", CTLTYPE_NODE }, \ 275 { "icmp", CTLTYPE_NODE }, \ 276 { "igmp", CTLTYPE_NODE }, \ 277 { "ggp", CTLTYPE_NODE }, \ 278 { 0, 0 }, \ 279 { 0, 0 }, \ 280 { "tcp", CTLTYPE_NODE }, \ 281 { 0, 0 }, \ 282 { "egp", CTLTYPE_NODE }, \ 283 { 0, 0 }, \ 284 { 0, 0 }, \ 285 { 0, 0 }, \ 286 { "pup", CTLTYPE_NODE }, \ 287 { 0, 0 }, \ 288 { 0, 0 }, \ 289 { 0, 0 }, \ 290 { 0, 0 }, \ 291 { "udp", CTLTYPE_NODE }, \ 292 { 0, 0 }, \ 293 { 0, 0 }, \ 294 { 0, 0 }, \ 295 { 0, 0 }, \ 296 { "idp", CTLTYPE_NODE }, \ 297 { 0, 0 }, \ 298 { 0, 0 }, \ 299 { 0, 0 }, \ 300 { 0, 0 }, \ 301 { 0, 0 }, \ 302 { 0, 0 }, \ 303 { 0, 0 }, \ 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 { "ipsec", CTLTYPE_NODE }, \ 326 } 327 328 /* 329 * Names for IP sysctl objects 330 */ 331 #define IPCTL_FORWARDING 1 /* act as router */ 332 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 333 #define IPCTL_DEFTTL 3 /* default TTL */ 334 #ifdef notyet 335 #define IPCTL_DEFMTU 4 /* default MTU */ 336 #endif 337 #define IPCTL_FORWSRCRT 5 /* forward source-routed packets */ 338 #define IPCTL_DIRECTEDBCAST 6 /* default broadcast behavior */ 339 #define IPCTL_ALLOWSRCRT 7 /* allow/drop all source-routed pkts */ 340 #define IPCTL_SUBNETSARELOCAL 8 /* treat subnets as local addresses */ 341 #define IPCTL_MTUDISC 9 /* allow path MTU discovery */ 342 #define IPCTL_ANONPORTMIN 10 /* minimum ephemeral port */ 343 #define IPCTL_ANONPORTMAX 11 /* maximum ephemeral port */ 344 #define IPCTL_MTUDISCTIMEOUT 12 /* allow path MTU discovery */ 345 #define IPCTL_MAXFLOWS 13 /* maximum ip flows allowed */ 346 #define IPCTL_HOSTZEROBROADCAST 14 /* is host zero a broadcast addr? */ 347 #define IPCTL_GIF_TTL 15 /* default TTL for gif encap packet */ 348 #define IPCTL_MAXID 16 349 350 #define IPCTL_NAMES { \ 351 { 0, 0 }, \ 352 { "forwarding", CTLTYPE_INT }, \ 353 { "redirect", CTLTYPE_INT }, \ 354 { "ttl", CTLTYPE_INT }, \ 355 { "mtu", CTLTYPE_INT }, \ 356 { "forwsrcrt", CTLTYPE_INT }, \ 357 { "directed-broadcast", CTLTYPE_INT }, \ 358 { "allowsrcrt", CTLTYPE_INT }, \ 359 { "subnetsarelocal", CTLTYPE_INT }, \ 360 { "mtudisc", CTLTYPE_INT }, \ 361 { "anonportmin", CTLTYPE_INT }, \ 362 { "anonportmax", CTLTYPE_INT }, \ 363 { "mtudisctimeout", CTLTYPE_INT }, \ 364 { "maxflows", CTLTYPE_INT }, \ 365 { "hostzerobroadcast", CTLTYPE_INT }, \ 366 { "gifttl", CTLTYPE_INT }, \ 367 } 368 #endif /* !_XOPEN_SOURCE */ 369 370 /* INET6 stuff */ 371 #define __KAME_NETINET_IN_H_INCLUDED_ 372 #include <netinet6/in6.h> 373 #undef __KAME_NETINET_IN_H_INCLUDED_ 374 375 #ifdef _KERNEL 376 extern struct in_addr zeroin_addr; 377 extern u_char ip_protox[]; 378 379 int in_broadcast __P((struct in_addr, struct ifnet *)); 380 int in_canforward __P((struct in_addr)); 381 int in_cksum __P((struct mbuf *, int)); 382 int in4_cksum __P((struct mbuf *, u_int8_t, int, int)); 383 int in_localaddr __P((struct in_addr)); 384 void in_socktrim __P((struct sockaddr_in *)); 385 386 #define in_hosteq(s,t) ((s).s_addr == (t).s_addr) 387 #define in_nullhost(x) ((x).s_addr == INADDR_ANY) 388 389 #define satosin(sa) ((struct sockaddr_in *)(sa)) 390 #define sintosa(sin) ((struct sockaddr *)(sin)) 391 #define ifatoia(ifa) ((struct in_ifaddr *)(ifa)) 392 #endif /* _KERNEL */ 393 394 #endif /* !_NETINET_IN_H_ */ 395
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