1 /* $NetBSD: in.h,v 1.97 2015/05/02 14:41:32 roy 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 <sys/featuretest.h>
43 #include <machine/int_types.h>
44
45 #ifndef uint8_t
46 typedef __uint8_t uint8_t;
47 #define uint8_t __uint8_t
48 #endif
49
50 #ifndef uint32_t
51 typedef __uint32_t uint32_t;
52 #define uint32_t __uint32_t
53 #endif
54
55 #include <sys/ansi.h>
56
57 #ifndef in_addr_t
58 typedef __in_addr_t in_addr_t;
59 #define in_addr_t __in_addr_t
60 #endif
61
62 #ifndef in_port_t
63 typedef __in_port_t in_port_t;
64 #define in_port_t __in_port_t
65 #endif
66
67 #ifndef sa_family_t
68 typedef __sa_family_t sa_family_t;
69 #define sa_family_t __sa_family_t
70 #endif
71
72 /*
73 * Protocols
74 */
75 #define IPPROTO_IP 0 /* dummy for IP */
76 #define IPPROTO_HOPOPTS 0 /* IP6 hop-by-hop options */
77 #define IPPROTO_ICMP 1 /* control message protocol */
78 #define IPPROTO_IGMP 2 /* group mgmt protocol */
79 #define IPPROTO_GGP 3 /* gateway^2 (deprecated) */
80 #define IPPROTO_IPV4 4 /* IP header */
81 #define IPPROTO_IPIP 4 /* IP inside IP */
82 #define IPPROTO_TCP 6 /* tcp */
83 #define IPPROTO_EGP 8 /* exterior gateway protocol */
84 #define IPPROTO_PUP 12 /* pup */
85 #define IPPROTO_UDP 17 /* user datagram protocol */
86 #define IPPROTO_IDP 22 /* xns idp */
87 #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */
88 #define IPPROTO_DCCP 33 /* DCCP */
89 #define IPPROTO_IPV6 41 /* IP6 header */
90 #define IPPROTO_ROUTING 43 /* IP6 routing header */
91 #define IPPROTO_FRAGMENT 44 /* IP6 fragmentation header */
92 #define IPPROTO_RSVP 46 /* resource reservation */
93 #define IPPROTO_GRE 47 /* GRE encaps RFC 1701 */
94 #define IPPROTO_ESP 50 /* encap. security payload */
95 #define IPPROTO_AH 51 /* authentication header */
96 #define IPPROTO_MOBILE 55 /* IP Mobility RFC 2004 */
97 #define IPPROTO_IPV6_ICMP 58 /* IPv6 ICMP */
98 #define IPPROTO_ICMPV6 58 /* ICMP6 */
99 #define IPPROTO_NONE 59 /* IP6 no next header */
100 #define IPPROTO_DSTOPTS 60 /* IP6 destination option */
101 #define IPPROTO_EON 80 /* ISO cnlp */
102 #define IPPROTO_ETHERIP 97 /* Ethernet-in-IP */
103 #define IPPROTO_ENCAP 98 /* encapsulation header */
104 #define IPPROTO_PIM 103 /* Protocol indep. multicast */
105 #define IPPROTO_IPCOMP 108 /* IP Payload Comp. Protocol */
106 #define IPPROTO_VRRP 112 /* VRRP RFC 2338 */
107 #define IPPROTO_CARP 112 /* Common Address Resolution Protocol */
108 #define IPPROTO_PFSYNC 240 /* PFSYNC */
109 #define IPPROTO_RAW 255 /* raw IP packet */
110 #define IPPROTO_MAX 256
111
112 /* last return value of *_input(), meaning "all job for this pkt is done". */
113 #define IPPROTO_DONE 257
114
115 /* sysctl placeholder for (FAST_)IPSEC */
116 #define CTL_IPPROTO_IPSEC 258
117
118
119 /*
120 * Local port number conventions:
121 *
122 * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
123 * unless a kernel is compiled with IPNOPRIVPORTS defined.
124 *
125 * When a user does a bind(2) or connect(2) with a port number of zero,
126 * a non-conflicting local port address is chosen.
127 *
128 * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
129 * that is settable by sysctl(3); net.inet.ip.anonportmin and
130 * net.inet.ip.anonportmax respectively.
131 *
132 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
133 * default assignment range.
134 *
135 * The value IP_PORTRANGE_DEFAULT causes the default behavior.
136 *
137 * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
138 * and exists only for FreeBSD compatibility purposes.
139 *
140 * The value IP_PORTRANGE_LOW changes the range to the "low" are
141 * that is (by convention) restricted to privileged processes.
142 * This convention is based on "vouchsafe" principles only.
143 * It is only secure if you trust the remote host to restrict these ports.
144 * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
145 */
146
147 #define IPPORT_RESERVED 1024
148 #define IPPORT_ANONMIN 49152
149 #define IPPORT_ANONMAX 65535
150 #define IPPORT_RESERVEDMIN 600
151 #define IPPORT_RESERVEDMAX (IPPORT_RESERVED-1)
152
153 /*
154 * Internet address (a structure for historical reasons)
155 */
156 struct in_addr {
157 in_addr_t s_addr;
158 } __packed;
159
160 /*
161 * Definitions of bits in internet address integers.
162 * On subnets, the decomposition of addresses to host and net parts
163 * is done according to subnet mask, not the masks here.
164 *
165 * By byte-swapping the constants, we avoid ever having to byte-swap IP
166 * addresses inside the kernel. Unfortunately, user-level programs rely
167 * on these macros not doing byte-swapping.
168 */
169 #ifdef _KERNEL
170 #define __IPADDR(x) ((uint32_t) htonl((uint32_t)(x)))
171 #else
172 #define __IPADDR(x) ((uint32_t)(x))
173 #endif
174
175 #define IN_CLASSA(i) (((uint32_t)(i) & __IPADDR(0x80000000)) == \
176 __IPADDR(0x00000000))
177 #define IN_CLASSA_NET __IPADDR(0xff000000)
178 #define IN_CLASSA_NSHIFT 24
179 #define IN_CLASSA_HOST __IPADDR(0x00ffffff)
180 #define IN_CLASSA_MAX 128
181
182 #define IN_CLASSB(i) (((uint32_t)(i) & __IPADDR(0xc0000000)) == \
183 __IPADDR(0x80000000))
184 #define IN_CLASSB_NET __IPADDR(0xffff0000)
185 #define IN_CLASSB_NSHIFT 16
186 #define IN_CLASSB_HOST __IPADDR(0x0000ffff)
187 #define IN_CLASSB_MAX 65536
188
189 #define IN_CLASSC(i) (((uint32_t)(i) & __IPADDR(0xe0000000)) == \
190 __IPADDR(0xc0000000))
191 #define IN_CLASSC_NET __IPADDR(0xffffff00)
192 #define IN_CLASSC_NSHIFT 8
193 #define IN_CLASSC_HOST __IPADDR(0x000000ff)
194
195 #define IN_CLASSD(i) (((uint32_t)(i) & __IPADDR(0xf0000000)) == \
196 __IPADDR(0xe0000000))
197 /* These ones aren't really net and host fields, but routing needn't know. */
198 #define IN_CLASSD_NET __IPADDR(0xf0000000)
199 #define IN_CLASSD_NSHIFT 28
200 #define IN_CLASSD_HOST __IPADDR(0x0fffffff)
201 #define IN_MULTICAST(i) IN_CLASSD(i)
202
203 #define IN_EXPERIMENTAL(i) (((uint32_t)(i) & __IPADDR(0xf0000000)) == \
204 __IPADDR(0xf0000000))
205 #define IN_BADCLASS(i) (((uint32_t)(i) & __IPADDR(0xf0000000)) == \
206 __IPADDR(0xf0000000))
207
208 #define IN_LINKLOCAL(i) (((uint32_t)(i) & __IPADDR(0xffff0000)) == \
209 __IPADDR(0xa9fe0000))
210
211 #define IN_PRIVATE(i) ((((uint32_t)(i) & __IPADDR(0xff000000)) == \
212 __IPADDR(0x0a000000)) || \
213 (((uint32_t)(i) & __IPADDR(0xfff00000)) == \
214 __IPADDR(0xac100000)) || \
215 (((uint32_t)(i) & __IPADDR(0xffff0000)) == \
216 __IPADDR(0xc0a80000)))
217
218 #define IN_LOCAL_GROUP(i) (((uint32_t)(i) & __IPADDR(0xffffff00)) == \
219 __IPADDR(0xe0000000))
220
221 #define IN_ANY_LOCAL(i) (IN_LINKLOCAL(i) || IN_LOCAL_GROUP(i))
222
223 #define INADDR_ANY __IPADDR(0x00000000)
224 #define INADDR_LOOPBACK __IPADDR(0x7f000001)
225 #define INADDR_BROADCAST __IPADDR(0xffffffff) /* must be masked */
226 #define INADDR_NONE __IPADDR(0xffffffff) /* -1 return */
227
228 #define INADDR_UNSPEC_GROUP __IPADDR(0xe0000000) /* 224.0.0.0 */
229 #define INADDR_ALLHOSTS_GROUP __IPADDR(0xe0000001) /* 224.0.0.1 */
230 #define INADDR_ALLRTRS_GROUP __IPADDR(0xe0000002) /* 224.0.0.2 */
231 #define INADDR_CARP_GROUP __IPADDR(0xe0000012) /* 224.0.0.18 */
232 #define INADDR_MAX_LOCAL_GROUP __IPADDR(0xe00000ff) /* 224.0.0.255 */
233
234 #define IN_LOOPBACKNET 127 /* official! */
235
236 /*
237 * Socket address, internet style.
238 */
239 struct sockaddr_in {
240 uint8_t sin_len;
241 sa_family_t sin_family;
242 in_port_t sin_port;
243 struct in_addr sin_addr;
244 __int8_t sin_zero[8];
245 };
246
247 #define INET_ADDRSTRLEN 16
248
249 /*
250 * Structure used to describe IP options.
251 * Used to store options internally, to pass them to a process,
252 * or to restore options retrieved earlier.
253 * The ip_dst is used for the first-hop gateway when using a source route
254 * (this gets put into the header proper).
255 */
256 struct ip_opts {
257 struct in_addr ip_dst; /* first hop, 0 w/o src rt */
258 #if defined(__cplusplus)
259 __int8_t Ip_opts[40]; /* actually variable in size */
260 #else
261 __int8_t ip_opts[40]; /* actually variable in size */
262 #endif
263 };
264
265 /*
266 * Options for use with [gs]etsockopt at the IP level.
267 * First word of comment is data type; bool is stored in int.
268 */
269 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */
270 #define IP_HDRINCL 2 /* int; header is included with data */
271 #define IP_TOS 3 /* int; IP type of service and preced. */
272 #define IP_TTL 4 /* int; IP time to live */
273 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */
274 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */
275 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */
276 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */
277 #define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */
278 #define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */
279 #define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */
280 /* The add and drop membership option numbers need to match with the v6 ones */
281 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */
282 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */
283 #define IP_PORTALGO 18 /* int; port selection algo (rfc6056) */
284 #define IP_PORTRANGE 19 /* int; range to use for ephemeral port */
285 #define IP_RECVIF 20 /* bool; receive reception if w/dgram */
286 #define IP_ERRORMTU 21 /* int; get MTU of last xmit = EMSGSIZE */
287 #define IP_IPSEC_POLICY 22 /* struct; get/set security policy */
288 #define IP_RECVTTL 23 /* bool; receive IP TTL w/dgram */
289 #define IP_MINTTL 24 /* minimum TTL for packet or drop */
290 #define IP_PKTINFO 25 /* int; send interface and src addr */
291 #define IP_RECVPKTINFO 26 /* int; send interface and dst addr */
292
293 /*
294 * Information sent in the control message of a datagram socket for
295 * IP_PKTINFO and IP_RECVPKTINFO.
296 */
297 struct in_pktinfo {
298 struct in_addr ipi_addr; /* src/dst address */
299 unsigned int ipi_ifindex; /* interface index */
300 };
301
302 /*
303 * Defaults and limits for options
304 */
305 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */
306 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */
307 #define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */
308
309 /*
310 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
311 */
312 struct ip_mreq {
313 struct in_addr imr_multiaddr; /* IP multicast address of group */
314 struct in_addr imr_interface; /* local IP address of interface */
315 };
316
317 /*
318 * Argument for IP_PORTRANGE:
319 * - which range to search when port is unspecified at bind() or connect()
320 */
321 #define IP_PORTRANGE_DEFAULT 0 /* default range */
322 #define IP_PORTRANGE_HIGH 1 /* same as DEFAULT (FreeBSD compat) */
323 #define IP_PORTRANGE_LOW 2 /* use privileged range */
324
325 #if defined(_NETBSD_SOURCE)
326 /*
327 * Definitions for inet sysctl operations.
328 *
329 * Third level is protocol number.
330 * Fourth level is desired variable within that protocol.
331 */
332 #define IPPROTO_MAXID (IPPROTO_AH + 1) /* don't list to IPPROTO_MAX */
333
334 #define CTL_IPPROTO_NAMES { \
335 { "ip", CTLTYPE_NODE }, \
336 { "icmp", CTLTYPE_NODE }, \
337 { "igmp", CTLTYPE_NODE }, \
338 { "ggp", CTLTYPE_NODE }, \
339 { 0, 0 }, \
340 { 0, 0 }, \
341 { "tcp", CTLTYPE_NODE }, \
342 { 0, 0 }, \
343 { "egp", CTLTYPE_NODE }, \
344 { 0, 0 }, \
345 { 0, 0 }, \
346 { 0, 0 }, \
347 { "pup", CTLTYPE_NODE }, \
348 { 0, 0 }, \
349 { 0, 0 }, \
350 { 0, 0 }, \
351 { 0, 0 }, \
352 { "udp", CTLTYPE_NODE }, \
353 { 0, 0 }, \
354 { 0, 0 }, \
355 { 0, 0 }, \
356 { 0, 0 }, \
357 { "idp", CTLTYPE_NODE }, \
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 { 0, 0 }, \
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 { "ipsec", CTLTYPE_NODE }, \
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 { 0, 0 }, \
427 { 0, 0 }, \
428 { 0, 0 }, \
429 { 0, 0 }, \
430 { 0, 0 }, \
431 { 0, 0 }, \
432 { 0, 0 }, \
433 { 0, 0 }, \
434 { 0, 0 }, \
435 { 0, 0 }, \
436 { 0, 0 }, \
437 { 0, 0 }, \
438 { "pim", CTLTYPE_NODE }, \
439 }
440
441 /*
442 * Names for IP sysctl objects
443 */
444 #define IPCTL_FORWARDING 1 /* act as router */
445 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */
446 #define IPCTL_DEFTTL 3 /* default TTL */
447 #ifdef notyet
448 #define IPCTL_DEFMTU 4 /* default MTU */
449 #endif
450 #define IPCTL_FORWSRCRT 5 /* forward source-routed packets */
451 #define IPCTL_DIRECTEDBCAST 6 /* default broadcast behavior */
452 #define IPCTL_ALLOWSRCRT 7 /* allow/drop all source-routed pkts */
453 #define IPCTL_SUBNETSARELOCAL 8 /* treat subnets as local addresses */
454 #define IPCTL_MTUDISC 9 /* allow path MTU discovery */
455 #define IPCTL_ANONPORTMIN 10 /* minimum ephemeral port */
456 #define IPCTL_ANONPORTMAX 11 /* maximum ephemeral port */
457 #define IPCTL_MTUDISCTIMEOUT 12 /* allow path MTU discovery */
458 #define IPCTL_MAXFLOWS 13 /* maximum ip flows allowed */
459 #define IPCTL_HOSTZEROBROADCAST 14 /* is host zero a broadcast addr? */
460 #define IPCTL_GIF_TTL 15 /* default TTL for gif encap packet */
461 #define IPCTL_LOWPORTMIN 16 /* minimum reserved port */
462 #define IPCTL_LOWPORTMAX 17 /* maximum reserved port */
463 #define IPCTL_MAXFRAGPACKETS 18 /* max packets reassembly queue */
464 #define IPCTL_GRE_TTL 19 /* default TTL for gre encap packet */
465 #define IPCTL_CHECKINTERFACE 20 /* drop pkts in from 'wrong' iface */
466 #define IPCTL_IFQ 21 /* IP packet input queue */
467 #define IPCTL_RANDOMID 22 /* use random IP ids (if configured) */
468 #define IPCTL_LOOPBACKCKSUM 23 /* do IP checksum on loopback */
469 #define IPCTL_STATS 24 /* IP statistics */
470 #define IPCTL_DAD_COUNT 25 /* DAD packets to send */
471 #define IPCTL_MAXID 26
472
473 #define IPCTL_NAMES { \
474 { 0, 0 }, \
475 { "forwarding", CTLTYPE_INT }, \
476 { "redirect", CTLTYPE_INT }, \
477 { "ttl", CTLTYPE_INT }, \
478 { "mtu", CTLTYPE_INT }, \
479 { "forwsrcrt", CTLTYPE_INT }, \
480 { "directed-broadcast", CTLTYPE_INT }, \
481 { "allowsrcrt", CTLTYPE_INT }, \
482 { "subnetsarelocal", CTLTYPE_INT }, \
483 { "mtudisc", CTLTYPE_INT }, \
484 { "anonportmin", CTLTYPE_INT }, \
485 { "anonportmax", CTLTYPE_INT }, \
486 { "mtudisctimeout", CTLTYPE_INT }, \
487 { "maxflows", CTLTYPE_INT }, \
488 { "hostzerobroadcast", CTLTYPE_INT }, \
489 { "gifttl", CTLTYPE_INT }, \
490 { "lowportmin", CTLTYPE_INT }, \
491 { "lowportmax", CTLTYPE_INT }, \
492 { "maxfragpackets", CTLTYPE_INT }, \
493 { "grettl", CTLTYPE_INT }, \
494 { "checkinterface", CTLTYPE_INT }, \
495 { "ifq", CTLTYPE_NODE }, \
496 { "random_id", CTLTYPE_INT }, \
497 { "do_loopback_cksum", CTLTYPE_INT }, \
498 { "stats", CTLTYPE_STRUCT }, \
499 { "dad_count", CTLTYPE_INT }, \
500 }
501 #endif /* _NETBSD_SOURCE */
502
503 /* INET6 stuff */
504 #define __KAME_NETINET_IN_H_INCLUDED_
505 #include <netinet6/in6.h>
506 #undef __KAME_NETINET_IN_H_INCLUDED_
507
508 #ifdef _KERNEL
509 /*
510 * in_cksum_phdr:
511 *
512 * Compute significant parts of the IPv4 checksum pseudo-header
513 * for use in a delayed TCP/UDP checksum calculation.
514 *
515 * Args:
516 *
517 * src Source IP address
518 * dst Destination IP address
519 * lenproto htons(proto-hdr-len + proto-number)
520 */
521 static __inline u_int16_t __unused
in_cksum_phdr(u_int32_t src,u_int32_t dst,u_int32_t lenproto)522 in_cksum_phdr(u_int32_t src, u_int32_t dst, u_int32_t lenproto)
523 {
524 u_int32_t sum;
525
526 sum = lenproto +
527 (u_int16_t)(src >> 16) +
528 (u_int16_t)(src /*& 0xffff*/) +
529 (u_int16_t)(dst >> 16) +
530 (u_int16_t)(dst /*& 0xffff*/);
531
532 sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);
533
534 if (sum > 0xffff)
535 sum -= 0xffff;
536
537 return (sum);
538 }
539
540 /*
541 * in_cksum_addword:
542 *
543 * Add the two 16-bit network-order values, carry, and return.
544 */
545 static __inline u_int16_t __unused
in_cksum_addword(u_int16_t a,u_int16_t b)546 in_cksum_addword(u_int16_t a, u_int16_t b)
547 {
548 u_int32_t sum = a + b;
549
550 if (sum > 0xffff)
551 sum -= 0xffff;
552
553 return (sum);
554 }
555
556 extern struct in_addr zeroin_addr;
557 extern u_char ip_protox[];
558 extern const struct sockaddr_in in_any;
559
560 int in_broadcast(struct in_addr, struct ifnet *);
561 int in_canforward(struct in_addr);
562 int cpu_in_cksum(struct mbuf *, int, int, uint32_t);
563 int in_cksum(struct mbuf *, int);
564 int in4_cksum(struct mbuf *, u_int8_t, int, int);
565 void in_delayed_cksum(struct mbuf *);
566 int in_localaddr(struct in_addr);
567 void in_socktrim(struct sockaddr_in *);
568
569 void in_if_link_up(struct ifnet *);
570 void in_if_link_down(struct ifnet *);
571 void in_if_up(struct ifnet *);
572 void in_if_down(struct ifnet *);
573 void in_if_link_state_change(struct ifnet *, int);
574
575 struct route;
576 struct ip_moptions;
577
578 struct sockaddr_in *in_selectsrc(struct sockaddr_in *,
579 struct route *, int, struct ip_moptions *, int *);
580
581 #define in_hosteq(s,t) ((s).s_addr == (t).s_addr)
582 #define in_nullhost(x) ((x).s_addr == INADDR_ANY)
583
584 #define satosin(sa) ((struct sockaddr_in *)(sa))
585 #define satocsin(sa) ((const struct sockaddr_in *)(sa))
586 #define sintosa(sin) ((struct sockaddr *)(sin))
587 #define sintocsa(sin) ((const struct sockaddr *)(sin))
588 #define ifatoia(ifa) ((struct in_ifaddr *)(ifa))
589
590 int sockaddr_in_cmp(const struct sockaddr *, const struct sockaddr *);
591 const void *sockaddr_in_const_addr(const struct sockaddr *, socklen_t *);
592 void *sockaddr_in_addr(struct sockaddr *, socklen_t *);
593
594 static inline void
sockaddr_in_init1(struct sockaddr_in * sin,const struct in_addr * addr,in_port_t port)595 sockaddr_in_init1(struct sockaddr_in *sin, const struct in_addr *addr,
596 in_port_t port)
597 {
598 sin->sin_port = port;
599 sin->sin_addr = *addr;
600 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
601 }
602
603 static inline void
sockaddr_in_init(struct sockaddr_in * sin,const struct in_addr * addr,in_port_t port)604 sockaddr_in_init(struct sockaddr_in *sin, const struct in_addr *addr,
605 in_port_t port)
606 {
607 sin->sin_family = AF_INET;
608 sin->sin_len = sizeof(*sin);
609 sockaddr_in_init1(sin, addr, port);
610 }
611
612 static inline struct sockaddr *
sockaddr_in_alloc(const struct in_addr * addr,in_port_t port,int flags)613 sockaddr_in_alloc(const struct in_addr *addr, in_port_t port, int flags)
614 {
615 struct sockaddr *sa;
616
617 sa = sockaddr_alloc(AF_INET, sizeof(struct sockaddr_in), flags);
618
619 if (sa == NULL)
620 return NULL;
621
622 sockaddr_in_init1(satosin(sa), addr, port);
623
624 return sa;
625 }
626 #endif /* _KERNEL */
627
628 #if defined(_KERNEL) || defined(_TEST)
629 int in_print(char *, size_t, const struct in_addr *);
630 #define IN_PRINT(b, a) (in_print((b), sizeof(b), a), (b))
631 int sin_print(char *, size_t, const void *);
632 #endif
633
634 #endif /* !_NETINET_IN_H_ */
635