in.h revision 1.87
1 /* $NetBSD: in.h,v 1.87 2012/06/22 14:54:35 christos 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)in.h 8.3 (Berkeley) 1/3/94 32 */ 33 34 /* 35 * Constants and structures defined by the internet system, 36 * Per RFC 790, September 1981, and numerous additions. 37 */ 38 39 #ifndef _NETINET_IN_H_ 40 #define _NETINET_IN_H_ 41 42 #include <machine/int_types.h> 43 44 #ifndef uint8_t 45 typedef __uint8_t uint8_t; 46 #define uint8_t __uint8_t 47 #endif 48 49 #ifndef uint32_t 50 typedef __uint32_t uint32_t; 51 #define uint32_t __uint32_t 52 #endif 53 54 #include <sys/ansi.h> 55 56 #ifndef in_addr_t 57 typedef __in_addr_t in_addr_t; 58 #define in_addr_t __in_addr_t 59 #endif 60 61 #ifndef in_port_t 62 typedef __in_port_t in_port_t; 63 #define in_port_t __in_port_t 64 #endif 65 66 #ifndef sa_family_t 67 typedef __sa_family_t sa_family_t; 68 #define sa_family_t __sa_family_t 69 #endif 70 71 /* 72 * Protocols 73 */ 74 #define IPPROTO_IP 0 /* dummy for IP */ 75 #define IPPROTO_HOPOPTS 0 /* IP6 hop-by-hop options */ 76 #define IPPROTO_ICMP 1 /* control message protocol */ 77 #define IPPROTO_IGMP 2 /* group mgmt protocol */ 78 #define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 79 #define IPPROTO_IPV4 4 /* IP header */ 80 #define IPPROTO_IPIP 4 /* IP inside IP */ 81 #define IPPROTO_TCP 6 /* tcp */ 82 #define IPPROTO_EGP 8 /* exterior gateway protocol */ 83 #define IPPROTO_PUP 12 /* pup */ 84 #define IPPROTO_UDP 17 /* user datagram protocol */ 85 #define IPPROTO_IDP 22 /* xns idp */ 86 #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 87 #define IPPROTO_IPV6 41 /* IP6 header */ 88 #define IPPROTO_ROUTING 43 /* IP6 routing header */ 89 #define IPPROTO_FRAGMENT 44 /* IP6 fragmentation header */ 90 #define IPPROTO_RSVP 46 /* resource reservation */ 91 #define IPPROTO_GRE 47 /* GRE encaps RFC 1701 */ 92 #define IPPROTO_ESP 50 /* encap. security payload */ 93 #define IPPROTO_AH 51 /* authentication header */ 94 #define IPPROTO_MOBILE 55 /* IP Mobility RFC 2004 */ 95 #define IPPROTO_IPV6_ICMP 58 /* IPv6 ICMP */ 96 #define IPPROTO_ICMPV6 58 /* ICMP6 */ 97 #define IPPROTO_NONE 59 /* IP6 no next header */ 98 #define IPPROTO_DSTOPTS 60 /* IP6 destination option */ 99 #define IPPROTO_EON 80 /* ISO cnlp */ 100 #define IPPROTO_ETHERIP 97 /* Ethernet-in-IP */ 101 #define IPPROTO_ENCAP 98 /* encapsulation header */ 102 #define IPPROTO_PIM 103 /* Protocol indep. multicast */ 103 #define IPPROTO_IPCOMP 108 /* IP Payload Comp. Protocol */ 104 #define IPPROTO_VRRP 112 /* VRRP RFC 2338 */ 105 #define IPPROTO_CARP 112 /* Common Address Resolution Protocol */ 106 #define IPPROTO_PFSYNC 240 /* PFSYNC */ 107 #define IPPROTO_RAW 255 /* raw IP packet */ 108 #define IPPROTO_MAX 256 109 110 /* last return value of *_input(), meaning "all job for this pkt is done". */ 111 #define IPPROTO_DONE 257 112 113 /* sysctl placeholder for (FAST_)IPSEC */ 114 #define CTL_IPPROTO_IPSEC 258 115 116 117 /* 118 * Local port number conventions: 119 * 120 * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root), 121 * unless a kernel is compiled with IPNOPRIVPORTS defined. 122 * 123 * When a user does a bind(2) or connect(2) with a port number of zero, 124 * a non-conflicting local port address is chosen. 125 * 126 * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although 127 * that is settable by sysctl(3); net.inet.ip.anonportmin and 128 * net.inet.ip.anonportmax respectively. 129 * 130 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this 131 * default assignment range. 132 * 133 * The value IP_PORTRANGE_DEFAULT causes the default behavior. 134 * 135 * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT, 136 * and exists only for FreeBSD compatibility purposes. 137 * 138 * The value IP_PORTRANGE_LOW changes the range to the "low" are 139 * that is (by convention) restricted to privileged processes. 140 * This convention is based on "vouchsafe" principles only. 141 * It is only secure if you trust the remote host to restrict these ports. 142 * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX. 143 */ 144 145 #define IPPORT_RESERVED 1024 146 #define IPPORT_ANONMIN 49152 147 #define IPPORT_ANONMAX 65535 148 #define IPPORT_RESERVEDMIN 600 149 #define IPPORT_RESERVEDMAX (IPPORT_RESERVED-1) 150 151 /* 152 * Internet address (a structure for historical reasons) 153 */ 154 struct in_addr { 155 in_addr_t s_addr; 156 } __packed; 157 158 /* 159 * Definitions of bits in internet address integers. 160 * On subnets, the decomposition of addresses to host and net parts 161 * is done according to subnet mask, not the masks here. 162 * 163 * By byte-swapping the constants, we avoid ever having to byte-swap IP 164 * addresses inside the kernel. Unfortunately, user-level programs rely 165 * on these macros not doing byte-swapping. 166 */ 167 #ifdef _KERNEL 168 #define __IPADDR(x) ((uint32_t) htonl((uint32_t)(x))) 169 #else 170 #define __IPADDR(x) ((uint32_t)(x)) 171 #endif 172 173 #define IN_CLASSA(i) (((uint32_t)(i) & __IPADDR(0x80000000)) == \ 174 __IPADDR(0x00000000)) 175 #define IN_CLASSA_NET __IPADDR(0xff000000) 176 #define IN_CLASSA_NSHIFT 24 177 #define IN_CLASSA_HOST __IPADDR(0x00ffffff) 178 #define IN_CLASSA_MAX 128 179 180 #define IN_CLASSB(i) (((uint32_t)(i) & __IPADDR(0xc0000000)) == \ 181 __IPADDR(0x80000000)) 182 #define IN_CLASSB_NET __IPADDR(0xffff0000) 183 #define IN_CLASSB_NSHIFT 16 184 #define IN_CLASSB_HOST __IPADDR(0x0000ffff) 185 #define IN_CLASSB_MAX 65536 186 187 #define IN_CLASSC(i) (((uint32_t)(i) & __IPADDR(0xe0000000)) == \ 188 __IPADDR(0xc0000000)) 189 #define IN_CLASSC_NET __IPADDR(0xffffff00) 190 #define IN_CLASSC_NSHIFT 8 191 #define IN_CLASSC_HOST __IPADDR(0x000000ff) 192 193 #define IN_CLASSD(i) (((uint32_t)(i) & __IPADDR(0xf0000000)) == \ 194 __IPADDR(0xe0000000)) 195 /* These ones aren't really net and host fields, but routing needn't know. */ 196 #define IN_CLASSD_NET __IPADDR(0xf0000000) 197 #define IN_CLASSD_NSHIFT 28 198 #define IN_CLASSD_HOST __IPADDR(0x0fffffff) 199 #define IN_MULTICAST(i) IN_CLASSD(i) 200 201 #define IN_EXPERIMENTAL(i) (((uint32_t)(i) & __IPADDR(0xf0000000)) == \ 202 __IPADDR(0xf0000000)) 203 #define IN_BADCLASS(i) (((uint32_t)(i) & __IPADDR(0xf0000000)) == \ 204 __IPADDR(0xf0000000)) 205 206 #define IN_LINKLOCAL(i) (((uint32_t)(i) & __IPADDR(0xffff0000)) == \ 207 __IPADDR(0xa9fe0000)) 208 209 #define IN_PRIVATE(i) ((((uint32_t)(i) & __IPADDR(0xff000000)) == \ 210 __IPADDR(0x0a000000)) || \ 211 (((uint32_t)(i) & __IPADDR(0xfff00000)) == \ 212 __IPADDR(0xac100000)) || \ 213 (((uint32_t)(i) & __IPADDR(0xffff0000)) == \ 214 __IPADDR(0xc0a80000))) 215 216 #define IN_LOCAL_GROUP(i) (((uint32_t)(i) & __IPADDR(0xffffff00)) == \ 217 __IPADDR(0xe0000000)) 218 219 #define IN_ANY_LOCAL(i) (IN_LINKLOCAL(i) || IN_LOCAL_GROUP(i)) 220 221 #define INADDR_ANY __IPADDR(0x00000000) 222 #define INADDR_LOOPBACK __IPADDR(0x7f000001) 223 #define INADDR_BROADCAST __IPADDR(0xffffffff) /* must be masked */ 224 #define INADDR_NONE __IPADDR(0xffffffff) /* -1 return */ 225 226 #define INADDR_UNSPEC_GROUP __IPADDR(0xe0000000) /* 224.0.0.0 */ 227 #define INADDR_ALLHOSTS_GROUP __IPADDR(0xe0000001) /* 224.0.0.1 */ 228 #define INADDR_ALLRTRS_GROUP __IPADDR(0xe0000002) /* 224.0.0.2 */ 229 #define INADDR_CARP_GROUP __IPADDR(0xe0000012) /* 224.0.0.18 */ 230 #define INADDR_MAX_LOCAL_GROUP __IPADDR(0xe00000ff) /* 224.0.0.255 */ 231 232 #define IN_LOOPBACKNET 127 /* official! */ 233 234 /* 235 * Socket address, internet style. 236 */ 237 struct sockaddr_in { 238 uint8_t sin_len; 239 sa_family_t sin_family; 240 in_port_t sin_port; 241 struct in_addr sin_addr; 242 __int8_t sin_zero[8]; 243 }; 244 245 #define INET_ADDRSTRLEN 16 246 247 /* 248 * Structure used to describe IP options. 249 * Used to store options internally, to pass them to a process, 250 * or to restore options retrieved earlier. 251 * The ip_dst is used for the first-hop gateway when using a source route 252 * (this gets put into the header proper). 253 */ 254 struct ip_opts { 255 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 256 #if defined(__cplusplus) 257 __int8_t Ip_opts[40]; /* actually variable in size */ 258 #else 259 __int8_t ip_opts[40]; /* actually variable in size */ 260 #endif 261 }; 262 263 /* 264 * Options for use with [gs]etsockopt at the IP level. 265 * First word of comment is data type; bool is stored in int. 266 */ 267 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 268 #define IP_HDRINCL 2 /* int; header is included with data */ 269 #define IP_TOS 3 /* int; IP type of service and preced. */ 270 #define IP_TTL 4 /* int; IP time to live */ 271 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 272 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 273 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 274 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 275 #define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */ 276 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 277 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 278 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 279 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 280 #define IP_PORTALGO 18 /* int; port selection algo (rfc6056) */ 281 #define IP_PORTRANGE 19 /* int; range to use for ephemeral port */ 282 #define IP_RECVIF 20 /* bool; receive reception if w/dgram */ 283 #define IP_ERRORMTU 21 /* int; get MTU of last xmit = EMSGSIZE */ 284 #if 1 /*IPSEC*/ 285 #define IP_IPSEC_POLICY 22 /* struct; get/set security policy */ 286 #endif 287 #define IP_RECVTTL 23 /* bool; receive IP TTL w/dgram */ 288 #define IP_MINTTL 24 /* minimum TTL for packet or drop */ 289 290 /* 291 * Defaults and limits for options 292 */ 293 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 294 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 295 #define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 296 297 /* 298 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 299 */ 300 struct ip_mreq { 301 struct in_addr imr_multiaddr; /* IP multicast address of group */ 302 struct in_addr imr_interface; /* local IP address of interface */ 303 }; 304 305 /* 306 * Argument for IP_PORTRANGE: 307 * - which range to search when port is unspecified at bind() or connect() 308 */ 309 #define IP_PORTRANGE_DEFAULT 0 /* default range */ 310 #define IP_PORTRANGE_HIGH 1 /* same as DEFAULT (FreeBSD compat) */ 311 #define IP_PORTRANGE_LOW 2 /* use privileged range */ 312 313 #if defined(_NETBSD_SOURCE) 314 /* 315 * Definitions for inet sysctl operations. 316 * 317 * Third level is protocol number. 318 * Fourth level is desired variable within that protocol. 319 */ 320 #define IPPROTO_MAXID (IPPROTO_AH + 1) /* don't list to IPPROTO_MAX */ 321 322 #define CTL_IPPROTO_NAMES { \ 323 { "ip", CTLTYPE_NODE }, \ 324 { "icmp", CTLTYPE_NODE }, \ 325 { "igmp", CTLTYPE_NODE }, \ 326 { "ggp", CTLTYPE_NODE }, \ 327 { 0, 0 }, \ 328 { 0, 0 }, \ 329 { "tcp", CTLTYPE_NODE }, \ 330 { 0, 0 }, \ 331 { "egp", CTLTYPE_NODE }, \ 332 { 0, 0 }, \ 333 { 0, 0 }, \ 334 { 0, 0 }, \ 335 { "pup", CTLTYPE_NODE }, \ 336 { 0, 0 }, \ 337 { 0, 0 }, \ 338 { 0, 0 }, \ 339 { 0, 0 }, \ 340 { "udp", CTLTYPE_NODE }, \ 341 { 0, 0 }, \ 342 { 0, 0 }, \ 343 { 0, 0 }, \ 344 { 0, 0 }, \ 345 { "idp", CTLTYPE_NODE }, \ 346 { 0, 0 }, \ 347 { 0, 0 }, \ 348 { 0, 0 }, \ 349 { 0, 0 }, \ 350 { 0, 0 }, \ 351 { 0, 0 }, \ 352 { 0, 0 }, \ 353 { 0, 0 }, \ 354 { 0, 0 }, \ 355 { 0, 0 }, \ 356 { 0, 0 }, \ 357 { 0, 0 }, \ 358 { 0, 0 }, \ 359 { 0, 0 }, \ 360 { 0, 0 }, \ 361 { 0, 0 }, \ 362 { 0, 0 }, \ 363 { 0, 0 }, \ 364 { 0, 0 }, \ 365 { 0, 0 }, \ 366 { 0, 0 }, \ 367 { 0, 0 }, \ 368 { 0, 0 }, \ 369 { 0, 0 }, \ 370 { 0, 0 }, \ 371 { 0, 0 }, \ 372 { 0, 0 }, \ 373 { 0, 0 }, \ 374 { "ipsec", CTLTYPE_NODE }, \ 375 { 0, 0 }, \ 376 { 0, 0 }, \ 377 { 0, 0 }, \ 378 { 0, 0 }, \ 379 { 0, 0 }, \ 380 { 0, 0 }, \ 381 { 0, 0 }, \ 382 { 0, 0 }, \ 383 { 0, 0 }, \ 384 { 0, 0 }, \ 385 { 0, 0 }, \ 386 { 0, 0 }, \ 387 { 0, 0 }, \ 388 { 0, 0 }, \ 389 { 0, 0 }, \ 390 { 0, 0 }, \ 391 { 0, 0 }, \ 392 { 0, 0 }, \ 393 { 0, 0 }, \ 394 { 0, 0 }, \ 395 { 0, 0 }, \ 396 { 0, 0 }, \ 397 { 0, 0 }, \ 398 { 0, 0 }, \ 399 { 0, 0 }, \ 400 { 0, 0 }, \ 401 { 0, 0 }, \ 402 { 0, 0 }, \ 403 { 0, 0 }, \ 404 { 0, 0 }, \ 405 { 0, 0 }, \ 406 { 0, 0 }, \ 407 { 0, 0 }, \ 408 { 0, 0 }, \ 409 { 0, 0 }, \ 410 { 0, 0 }, \ 411 { 0, 0 }, \ 412 { 0, 0 }, \ 413 { 0, 0 }, \ 414 { 0, 0 }, \ 415 { 0, 0 }, \ 416 { 0, 0 }, \ 417 { 0, 0 }, \ 418 { 0, 0 }, \ 419 { 0, 0 }, \ 420 { 0, 0 }, \ 421 { 0, 0 }, \ 422 { 0, 0 }, \ 423 { 0, 0 }, \ 424 { 0, 0 }, \ 425 { 0, 0 }, \ 426 { "pim", CTLTYPE_NODE }, \ 427 } 428 429 /* 430 * Names for IP sysctl objects 431 */ 432 #define IPCTL_FORWARDING 1 /* act as router */ 433 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 434 #define IPCTL_DEFTTL 3 /* default TTL */ 435 #ifdef notyet 436 #define IPCTL_DEFMTU 4 /* default MTU */ 437 #endif 438 #define IPCTL_FORWSRCRT 5 /* forward source-routed packets */ 439 #define IPCTL_DIRECTEDBCAST 6 /* default broadcast behavior */ 440 #define IPCTL_ALLOWSRCRT 7 /* allow/drop all source-routed pkts */ 441 #define IPCTL_SUBNETSARELOCAL 8 /* treat subnets as local addresses */ 442 #define IPCTL_MTUDISC 9 /* allow path MTU discovery */ 443 #define IPCTL_ANONPORTMIN 10 /* minimum ephemeral port */ 444 #define IPCTL_ANONPORTMAX 11 /* maximum ephemeral port */ 445 #define IPCTL_MTUDISCTIMEOUT 12 /* allow path MTU discovery */ 446 #define IPCTL_MAXFLOWS 13 /* maximum ip flows allowed */ 447 #define IPCTL_HOSTZEROBROADCAST 14 /* is host zero a broadcast addr? */ 448 #define IPCTL_GIF_TTL 15 /* default TTL for gif encap packet */ 449 #define IPCTL_LOWPORTMIN 16 /* minimum reserved port */ 450 #define IPCTL_LOWPORTMAX 17 /* maximum reserved port */ 451 #define IPCTL_MAXFRAGPACKETS 18 /* max packets reassembly queue */ 452 #define IPCTL_GRE_TTL 19 /* default TTL for gre encap packet */ 453 #define IPCTL_CHECKINTERFACE 20 /* drop pkts in from 'wrong' iface */ 454 #define IPCTL_IFQ 21 /* ipintrq node */ 455 #define IPCTL_RANDOMID 22 /* use random IP ids (if configured) */ 456 #define IPCTL_LOOPBACKCKSUM 23 /* do IP checksum on loopback */ 457 #define IPCTL_STATS 24 /* IP statistics */ 458 #define IPCTL_MAXID 25 459 460 #define IPCTL_NAMES { \ 461 { 0, 0 }, \ 462 { "forwarding", CTLTYPE_INT }, \ 463 { "redirect", CTLTYPE_INT }, \ 464 { "ttl", CTLTYPE_INT }, \ 465 { "mtu", CTLTYPE_INT }, \ 466 { "forwsrcrt", CTLTYPE_INT }, \ 467 { "directed-broadcast", CTLTYPE_INT }, \ 468 { "allowsrcrt", CTLTYPE_INT }, \ 469 { "subnetsarelocal", CTLTYPE_INT }, \ 470 { "mtudisc", CTLTYPE_INT }, \ 471 { "anonportmin", CTLTYPE_INT }, \ 472 { "anonportmax", CTLTYPE_INT }, \ 473 { "mtudisctimeout", CTLTYPE_INT }, \ 474 { "maxflows", CTLTYPE_INT }, \ 475 { "hostzerobroadcast", CTLTYPE_INT }, \ 476 { "gifttl", CTLTYPE_INT }, \ 477 { "lowportmin", CTLTYPE_INT }, \ 478 { "lowportmax", CTLTYPE_INT }, \ 479 { "maxfragpackets", CTLTYPE_INT }, \ 480 { "grettl", CTLTYPE_INT }, \ 481 { "checkinterface", CTLTYPE_INT }, \ 482 { "ifq", CTLTYPE_NODE }, \ 483 { "random_id", CTLTYPE_INT }, \ 484 { "do_loopback_cksum", CTLTYPE_INT }, \ 485 { "stats", CTLTYPE_STRUCT }, \ 486 } 487 #endif /* _NETBSD_SOURCE */ 488 489 /* INET6 stuff */ 490 #define __KAME_NETINET_IN_H_INCLUDED_ 491 #include <netinet6/in6.h> 492 #undef __KAME_NETINET_IN_H_INCLUDED_ 493 494 #ifdef _KERNEL 495 /* 496 * in_cksum_phdr: 497 * 498 * Compute significant parts of the IPv4 checksum pseudo-header 499 * for use in a delayed TCP/UDP checksum calculation. 500 * 501 * Args: 502 * 503 * src Source IP address 504 * dst Destination IP address 505 * lenproto htons(proto-hdr-len + proto-number) 506 */ 507 static __inline u_int16_t __unused 508 in_cksum_phdr(u_int32_t src, u_int32_t dst, u_int32_t lenproto) 509 { 510 u_int32_t sum; 511 512 sum = lenproto + 513 (u_int16_t)(src >> 16) + 514 (u_int16_t)(src /*& 0xffff*/) + 515 (u_int16_t)(dst >> 16) + 516 (u_int16_t)(dst /*& 0xffff*/); 517 518 sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/); 519 520 if (sum > 0xffff) 521 sum -= 0xffff; 522 523 return (sum); 524 } 525 526 /* 527 * in_cksum_addword: 528 * 529 * Add the two 16-bit network-order values, carry, and return. 530 */ 531 static __inline u_int16_t __unused 532 in_cksum_addword(u_int16_t a, u_int16_t b) 533 { 534 u_int32_t sum = a + b; 535 536 if (sum > 0xffff) 537 sum -= 0xffff; 538 539 return (sum); 540 } 541 542 extern struct in_addr zeroin_addr; 543 extern u_char ip_protox[]; 544 extern const struct sockaddr_in in_any; 545 546 int in_broadcast(struct in_addr, struct ifnet *); 547 int in_canforward(struct in_addr); 548 int cpu_in_cksum(struct mbuf *, int, int, uint32_t); 549 int in_cksum(struct mbuf *, int); 550 int in4_cksum(struct mbuf *, u_int8_t, int, int); 551 void in_delayed_cksum(struct mbuf *); 552 int in_localaddr(struct in_addr); 553 void in_socktrim(struct sockaddr_in *); 554 555 #define in_hosteq(s,t) ((s).s_addr == (t).s_addr) 556 #define in_nullhost(x) ((x).s_addr == INADDR_ANY) 557 558 #define satosin(sa) ((struct sockaddr_in *)(sa)) 559 #define satocsin(sa) ((const struct sockaddr_in *)(sa)) 560 #define sintosa(sin) ((struct sockaddr *)(sin)) 561 #define sintocsa(sin) ((const struct sockaddr *)(sin)) 562 #define ifatoia(ifa) ((struct in_ifaddr *)(ifa)) 563 564 int sockaddr_in_cmp(const struct sockaddr *, const struct sockaddr *); 565 const void *sockaddr_in_const_addr(const struct sockaddr *, socklen_t *); 566 void *sockaddr_in_addr(struct sockaddr *, socklen_t *); 567 568 static inline void 569 sockaddr_in_init1(struct sockaddr_in *sin, const struct in_addr *addr, 570 in_port_t port) 571 { 572 sin->sin_port = port; 573 sin->sin_addr = *addr; 574 memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); 575 } 576 577 static inline void 578 sockaddr_in_init(struct sockaddr_in *sin, const struct in_addr *addr, 579 in_port_t port) 580 { 581 sin->sin_family = AF_INET; 582 sin->sin_len = sizeof(*sin); 583 sockaddr_in_init1(sin, addr, port); 584 } 585 586 static inline struct sockaddr * 587 sockaddr_in_alloc(const struct in_addr *addr, in_port_t port, int flags) 588 { 589 struct sockaddr *sa; 590 591 sa = sockaddr_alloc(AF_INET, sizeof(struct sockaddr_in), flags); 592 593 if (sa == NULL) 594 return NULL; 595 596 sockaddr_in_init1(satosin(sa), addr, port); 597 598 return sa; 599 } 600 #endif /* _KERNEL */ 601 602 #endif /* !_NETINET_IN_H_ */ 603
Indexes created Mon Sep 22 10:09:38 GMT 2025