summaryrefslogtreecommitdiff
path: root/sys/netinet/in.h
blob: 089d5e40dcbccaf5ad7daa72defbc29c1721d815 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
/*	$OpenBSD: in.h,v 1.22 1999/04/09 23:28:44 niklas Exp $	*/
/*	$NetBSD: in.h,v 1.20 1996/02/13 23:41:47 christos Exp $	*/

/*
 * Copyright (c) 1982, 1986, 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)in.h	8.3 (Berkeley) 1/3/94
 */

/*
 * Constants and structures defined by the internet system,
 * Per RFC 790, September 1981, and numerous additions.
 */

#ifndef _NETINET_IN_H_
#define	_NETINET_IN_H_

/*
 * Protocols
 */
#define	IPPROTO_IP		0		/* dummy for IP */
#define IPPROTO_HOPOPTS		IPPROTO_IP	/* Hop-by-hop option header. */
#define	IPPROTO_ICMP		1		/* control message protocol */
#define	IPPROTO_IGMP		2		/* group mgmt protocol */
#define	IPPROTO_GGP		3		/* gateway^2 (deprecated) */
#define	IPPROTO_IPIP		4		/* IP inside IP */
#define	IPPROTO_IPV4		IPPROTO_IPIP	/* IP inside IP */
#define	IPPROTO_TCP		6		/* tcp */
#define	IPPROTO_EGP		8		/* exterior gateway protocol */
#define	IPPROTO_PUP		12		/* pup */
#define	IPPROTO_UDP		17		/* user datagram protocol */
#define	IPPROTO_IDP		22		/* xns idp */
#define	IPPROTO_TP		29 		/* tp-4 w/ class negotiation */
#define IPPROTO_IPV6		41		/* IPv6 in IPv6 */
#define IPPROTO_ROUTING		43		/* Routing header. */
#define IPPROTO_FRAGMENT	44		/* Fragmentation/reassembly header. */
#define	IPPROTO_ESP		50		/* Encap. Security Payload */
#define	IPPROTO_AH		51		/* Authentication header */
#define IPPROTO_ICMPV6		58		/* ICMP for IPv6 */
#define IPPROTO_NONE		59		/* No next header */
#define IPPROTO_DSTOPTS		60		/* Destination options header. */
#define	IPPROTO_EON		80		/* ISO cnlp */
#define	IPPROTO_ENCAP		98		/* encapsulation header */
#define	IPPROTO_RAW		255		/* raw IP packet */

#define	IPPROTO_MAX		256

/*
 * From FreeBSD:
 *
 * Local port number conventions:
 *
 * When a user does a bind(2) or connect(2) with a port number of zero,
 * a non-conflicting local port address is chosen.
 * The default range is IPPORT_RESERVED through
 * IPPORT_USERRESERVED, although that is settable by sysctl.
 *
 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
 * default assignment range.
 *
 * The value IP_PORTRANGE_DEFAULT causes the default behavior.
 *
 * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
 * into the "high" range.  These are reserved for client outbound connections
 * which do not want to be filtered by any firewalls.
 *
 * The value IP_PORTRANGE_LOW changes the range to the "low" are
 * that is (by convention) restricted to privileged processes.  This
 * convention is based on "vouchsafe" principles only.  It is only secure
 * if you trust the remote host to restrict these ports.
 *
 * The default range of ports and the high range can be changed by
 * sysctl(3).  (net.inet.ip.port{hi}{first,last})
 *
 * Changing those values has bad security implications if you are
 * using a a stateless firewall that is allowing packets outside of that
 * range in order to allow transparent outgoing connections.
 *
 * Such a firewall configuration will generally depend on the use of these
 * default values.  If you change them, you may find your Security
 * Administrator looking for you with a heavy object.
 */

/*
 * Ports < IPPORT_RESERVED are reserved for
 * privileged processes (e.g. root).
 * Ports > IPPORT_USERRESERVED are reserved
 * for servers, not necessarily privileged.
 */
#define	IPPORT_RESERVED		1024
#define	IPPORT_USERRESERVED	49151

/*
 * Default local port range to use by setting IP_PORTRANGE_HIGH
 */
#define IPPORT_HIFIRSTAUTO	49152
#define IPPORT_HILASTAUTO	65535

/*
 * IP Version 4 Internet address (a structure for historical reasons)
 */
struct in_addr {
	in_addr_t s_addr;
};

/*
 * IP Version 6 Internet address
 */
struct in6_addr {
	union {
		u_int8_t s6u_addr8[16];
		u_int16_t s6u_addr16[8];
		u_int32_t s6u_addr32[4];
	} s6_u;
#define s6_addr s6_u.s6u_addr8
/*
 * The rest are common, but not guaranteed to be portable. 64 bit access are
 * not available because the in6_addr in a sockaddr_in6 is not 64 bit aligned.
 */
#define s6_addr8 s6_u.s6u_addr8
#define s6_addr16 s6_u.s6u_addr16
#define s6_addr32 s6_u.s6u_addr32
};

/*
 * Definitions of bits in internet address integers.
 * On subnets, the decomposition of addresses to host and net parts
 * is done according to subnet mask, not the masks here.
 *
 * By byte-swapping the constants, we avoid ever having to byte-swap IP
 * addresses inside the kernel.  Unfortunately, user-level programs rely
 * on these macros not doing byte-swapping.
 */
#ifdef _KERNEL
#define	__IPADDR(x)	((u_int32_t) htonl((u_int32_t)(x)))
#else
#define	__IPADDR(x)	((u_int32_t)(x))
#endif

#define	IN_CLASSA(i)		(((u_int32_t)(i) & __IPADDR(0x80000000)) == \
				 __IPADDR(0x00000000))
#define	IN_CLASSA_NET		__IPADDR(0xff000000)
#define	IN_CLASSA_NSHIFT	24
#define	IN_CLASSA_HOST		__IPADDR(0x00ffffff)
#define	IN_CLASSA_MAX		128

#define	IN_CLASSB(i)		(((u_int32_t)(i) & __IPADDR(0xc0000000)) == \
				 __IPADDR(0x80000000))
#define	IN_CLASSB_NET		__IPADDR(0xffff0000)
#define	IN_CLASSB_NSHIFT	16
#define	IN_CLASSB_HOST		__IPADDR(0x0000ffff)
#define	IN_CLASSB_MAX		65536

#define	IN_CLASSC(i)		(((u_int32_t)(i) & __IPADDR(0xe0000000)) == \
				 __IPADDR(0xc0000000))
#define	IN_CLASSC_NET		__IPADDR(0xffffff00)
#define	IN_CLASSC_NSHIFT	8
#define	IN_CLASSC_HOST		__IPADDR(0x000000ff)

#define	IN_CLASSD(i)		(((u_int32_t)(i) & __IPADDR(0xf0000000)) == \
				 __IPADDR(0xe0000000))
/* These ones aren't really net and host fields, but routing needn't know. */
#define	IN_CLASSD_NET		__IPADDR(0xf0000000)
#define	IN_CLASSD_NSHIFT	28
#define	IN_CLASSD_HOST		__IPADDR(0x0fffffff)
#define	IN_MULTICAST(i)		IN_CLASSD(i)

#define	IN_EXPERIMENTAL(i)	(((u_int32_t)(i) & __IPADDR(0xf0000000)) == \
				 __IPADDR(0xf0000000))
#define	IN_BADCLASS(i)		(((u_int32_t)(i) & __IPADDR(0xf0000000)) == \
				 __IPADDR(0xf0000000))

#define	IN_LOCAL_GROUP(i)	(((u_int32_t)(i) & __IPADDR(0xffffff00)) == \
				 __IPADDR(0xe0000000))

#define	INADDR_ANY		__IPADDR(0x00000000)
#define	INADDR_LOOPBACK		__IPADDR(0x7f000001)
#define	INADDR_BROADCAST	__IPADDR(0xffffffff)	/* must be masked */
#ifndef _KERNEL
#define	INADDR_NONE		__IPADDR(0xffffffff)	/* -1 return */
#endif

#define	INADDR_UNSPEC_GROUP	__IPADDR(0xe0000000)	/* 224.0.0.0 */
#define	INADDR_ALLHOSTS_GROUP	__IPADDR(0xe0000001)	/* 224.0.0.1 */
#define INADDR_MAX_LOCAL_GROUP	__IPADDR(0xe00000ff)	/* 224.0.0.255 */

#define	IN_LOOPBACKNET		127			/* official! */

/*
 * Tests for IPv6 address types
 */

#define	IN6_IS_ADDR_LINKLOCAL(addr) \
	(((addr)->s6_addr32[0] & htonl(0xffc00000)) == htonl(0xfe800000))

#define	IN6_IS_ADDR_LOOPBACK(addr) \
	(((addr)->s6_addr32[0] == 0) && ((addr)->s6_addr32[1] == 0) && \
	 ((addr)->s6_addr32[2] == 0) && ((addr)->s6_addr32[3] == htonl(1)))

#define	IN6_IS_ADDR_MULTICAST(addr) \
	((addr)->s6_addr8[0] == 0xff)
	
#define	IN6_IS_ADDR_SITELOCAL(addr) \
	(((addr)->s6_addr32[0] & htonl(0xffc00000)) == htonl(0xfec00000))

#define	IN6_IS_ADDR_UNSPECIFIED(addr) \
	(((addr)->s6_addr32[0] == 0) && ((addr)->s6_addr32[1] == 0) && \
	 ((addr)->s6_addr32[2] == 0) && ((addr)->s6_addr32[3] == 0))

#define	IN6_IS_ADDR_V4COMPAT(addr) \
	(((addr)->s6_addr32[0] == 0) && ((addr)->s6_addr32[1] == 0) && \
	 ((addr)->s6_addr32[2] == 0) && ((addr)->s6_addr32[3] & ~htonl(1)))

#define	IN6_IS_ADDR_V4MAPPED(addr) \
	(((addr)->s6_addr32[0] == 0) && ((addr)->s6_addr32[1] == 0) && \
	 ((addr)->s6_addr32[2] == htonl(0xffff)))

#define	IN6_ARE_ADDR_EQUAL(addr1, addr2) \
	(((addr1)->s6_addr32[0] == (addr2)->s6_addr32[0]) && \
	 ((addr1)->s6_addr32[1] == (addr2)->s6_addr32[1]) && \
	 ((addr1)->s6_addr32[2] == (addr2)->s6_addr32[2]) && \
	 ((addr1)->s6_addr32[3] == (addr2)->s6_addr32[3]))

/*
 * IPv6 Multicast scoping.  The scope is stored
 * in the bottom 4 bits of the second byte of the
 * multicast address.
 */
		     /* 0x0 */	/* reserved */
#define	IN6_NODE_LOCAL	0x1	/* node-local scope */
#define	IN6_LINK_LOCAL	0x2	/* link-local scope */
		     /* 0x3 */	/* (unassigned) */
		     /* 0x4 */	/* (unassigned) */
#define	IN6_SITE_LOCAL	0x5	/* site-local scope */
		     /* 0x6 */	/* (unassigned) */
		     /* 0x7 */	/* (unassigned) */
#define	IN6_ORG_LOCAL	0x8	/* organization-local scope */
		     /* 0x9 */	/* (unassigned) */
		     /* 0xA */	/* (unassigned) */
		     /* 0xB */	/* (unassigned) */
		     /* 0xC */	/* (unassigned) */
		     /* 0xD */	/* (unassigned) */
#define	IN6_GLOBAL	0xE	/* global scope */
		     /* 0xF */	/* reserved */

#define	IN6_MSCOPE(addr)	((addr)->s6_addr8[1] & 0x0f)

#define	IN6_IS_ADDR_MC_NODELOCAL(addr) \
	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_NODE_LOCAL))
#define	IN6_IS_ADDR_MC_LINKLOCAL(addr) \
	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_LINK_LOCAL))
#define	IN6_IS_ADDR_MC_SITELOCAL(addr) \
	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_SITE_LOCAL))
#define	IN6_IS_ADDR_MC_ORGLOCAL(addr) \
	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_ORG_LOCAL))
#define	IN6_IS_ADDR_MC_GLOBAL(addr) \
	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_GLOBAL))

/*
 * Definitions of the IPv6 special addresses
 */
extern const struct in6_addr in6addr_any;
#define IN6ADDR_ANY_INIT {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}}

extern const struct in6_addr in6addr_loopback;
#define IN6ADDR_LOOPBACK_INIT {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}}

/*
 * IP Version 4 socket address.
 */
struct sockaddr_in {
	u_int8_t    sin_len;
	sa_family_t sin_family;
	in_port_t   sin_port;
	struct	    in_addr sin_addr;
	int8_t	    sin_zero[8];
};

/*
 * IP Version 6 socket address.
 */
#define SIN6_LEN 1
struct sockaddr_in6 {
	u_int8_t	sin6_len;
	sa_family_t	sin6_family;
	in_port_t	sin6_port;
	u_int32_t	sin6_flowinfo;
	struct in6_addr	sin6_addr;
	u_int32_t	sin6_scope_id;
};

/*
 * Structure used to describe IP options.
 * Used to store options internally, to pass them to a process,
 * or to restore options retrieved earlier.
 * The ip_dst is used for the first-hop gateway when using a source route
 * (this gets put into the header proper).
 */
struct ip_opts {
	struct in_addr	ip_dst;		/* first hop, 0 w/o src rt */
#if defined(__cplusplus)
	int8_t		Ip_opts[40];	/* cannot have same name as class */
#else
	int8_t		ip_opts[40];	/* actually variable in size */
#endif
};

/*
 * Options for use with [gs]etsockopt at the IP level.
 * First word of comment is data type; bool is stored in int.
 */
#define	IP_OPTIONS		1    /* buf/ip_opts; set/get IP options */
#define	IP_HDRINCL		2    /* int; header is included with data */
#define	IP_TOS			3    /* int; IP type of service and preced. */
#define	IP_TTL			4    /* int; IP time to live */
#define	IP_RECVOPTS		5    /* bool; receive all IP opts w/dgram */
#define	IP_RECVRETOPTS		6    /* bool; receive IP opts for response */
#define	IP_RECVDSTADDR		7    /* bool; receive IP dst addr w/dgram */
#define	IP_RETOPTS		8    /* ip_opts; set/get IP options */
#define	IP_MULTICAST_IF		9    /* in_addr; set/get IP multicast i/f  */
#define	IP_MULTICAST_TTL	10   /* u_char; set/get IP multicast ttl */
#define	IP_MULTICAST_LOOP	11   /* u_char; set/get IP multicast loopback */
#define	IP_ADD_MEMBERSHIP	12   /* ip_mreq; add an IP group membership */
#define	IP_DROP_MEMBERSHIP	13   /* ip_mreq; drop an IP group membership */

/* 14-17 left empty for future compatibility with FreeBSD */

#define IP_PORTRANGE		19   /* int; range to choose for unspec port */
#define IP_AUTH_LEVEL		20   /* u_char; authentication used */
#define IP_ESP_TRANS_LEVEL	21   /* u_char; transport encryption */
#define IP_ESP_NETWORK_LEVEL	22   /* u_char; full-packet encryption */

#define IPV6_MULTICAST_IF	23   /* u_int; set/get multicast interface */
#define IPV6_MULTICAST_HOPS	24   /* int; set/get multicast hop limit */
#define IPV6_MULTICAST_LOOP	25   /* u_int; set/get multicast loopback */
#define IPV6_JOIN_GROUP		26   /* ipv6_mreq; join multicast group */
#define IPV6_ADD_MEMBERSHIP	IPV6_JOIN_GROUP /* XXX - for compatibility */
#define IPV6_LEAVE_GROUP	27   /* ipv6_mreq: leave multicast group */
#define IPV6_DROP_MEMBERSHIP	IPV6_LEAVE_GROUP /* XXX - for compatibility */
#define IPV6_ADDRFORM		28   /* int; get/set form of returned addrs */
#define IPV6_UNICAST_HOPS	29   /* int; get/set unicast hop limit */
#define IPV6_PKTINFO		30   /* int; receive in6_pktinfo as cmsg */
#define IPV6_HOPLIMIT		31   /* int; receive int hoplimit as cmsg */
#define IPV6_NEXTHOP		32   /* int; receive sockaddr_in6 as cmsg */
#define IPV6_HOPOPTS		33   /* int; receive hop options as cmsg */
#define IPV6_DSTOPTS		34   /* int; receive dst options as cmsg */
#define IPV6_RTHDR		35   /* int; receive routing header as cmsg */
#define IPV6_PKTOPTIONS		36   /* int; send/receive cmsgs for TCP */
#define IPV6_CHECKSUM		37   /* int; offset to place send checksum */
#define ICMPV6_FILTER		38   /* struct icmpv6_filter; get/set filter */
#define ICMP6_FILTER		ICMP6_FILTER

#define IPSEC_OUTSA		39   /* set the outbound SA for a socket */

/*
 * Security levels - IPsec, not IPSO
 */

#define IPSEC_LEVEL_BYPASS      0x00    /* Bypass policy altogether */
#define IPSEC_LEVEL_NONE        0x00    /* Send clear, accept any */
#define IPSEC_LEVEL_AVAIL       0x01    /* Send secure if SA available */
#define IPSEC_LEVEL_USE         0x02    /* Send secure, accept any */
#define IPSEC_LEVEL_REQUIRE     0x03    /* Require secure inbound, also use */
#define IPSEC_LEVEL_UNIQUE      0x04    /* Use outbound SA that is unique */
#define IPSEC_LEVEL_DEFAULT     IPSEC_LEVEL_AVAIL

#define IPSEC_AUTH_LEVEL_DEFAULT IPSEC_LEVEL_DEFAULT
#define IPSEC_ESP_TRANS_LEVEL_DEFAULT IPSEC_LEVEL_DEFAULT
#define IPSEC_ESP_NETWORK_LEVEL_DEFAULT IPSEC_LEVEL_DEFAULT

/*
 * IPv6 Routing header types
 */
#define IPV6_RTHDR_TYPE_0	0 /* IPv6 Routing header type 0 */   

#define IPV6_RTHDR_LOOSE	0 /* this hop need not be a neighbor */
#define IPV6_RTHDR_STRICT	1 /* this hop must be a neighbor */

/*
 * Defaults and limits for options
 */
#define	IP_DEFAULT_MULTICAST_TTL  1	/* normally limit m'casts to 1 hop  */
#define	IP_DEFAULT_MULTICAST_LOOP 1	/* normally hear sends if a member  */
#define	IP_MAX_MEMBERSHIPS	20	/* per socket; must fit in one mbuf */

/*
 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
 */
struct ip_mreq {
	struct	in_addr imr_multiaddr;	/* IP multicast address of group */
	struct	in_addr imr_interface;	/* local IP address of interface */
};

/*
 * Argument structure for IPV6_ADD_MEMBERSHIP and IPV6_DROP_MEMBERSHIP.
 */
struct ipv6_mreq {
	struct	in6_addr	ipv6mr_multiaddr; /* IPv6 multicast addr */
	unsigned int		ipv6mr_interface; /* Interface index */
};

/*
 * Argument structure for IPV6_PKTINFO control messages
 */
struct in6_pktinfo {
	struct in6_addr ipi6_addr;
	unsigned int ipi6_ifindex;
};

/*
 * Argument for IP_PORTRANGE:
 * - which range to search when port is unspecified at bind() or connect()
 */
#define IP_PORTRANGE_DEFAULT	0	/* default range */
#define IP_PORTRANGE_HIGH	1	/* "high" - request firewall bypass */
#define IP_PORTRANGE_LOW	2	/* "low" - vouchsafe security */

/*
 * Buffer lengths for strings containing printable IP addresses
 */
#define INET_ADDRSTRLEN		16
#define INET6_ADDRSTRLEN	46

/*
 * Definitions for inet sysctl operations.
 *
 * Third level is protocol number.
 * Fourth level is desired variable within that protocol.
 */
#define	IPPROTO_MAXID	(IPPROTO_IDP + 1)	/* don't list to IPPROTO_MAX */

#define	CTL_IPPROTO_NAMES { \
	{ "ip", CTLTYPE_NODE }, \
	{ "icmp", CTLTYPE_NODE }, \
	{ "igmp", CTLTYPE_NODE }, \
	{ "ggp", CTLTYPE_NODE }, \
	{ "ip4", CTLTYPE_NODE }, \
	{ 0, 0 }, \
	{ "tcp", CTLTYPE_NODE }, \
	{ 0, 0 }, \
	{ "egp", CTLTYPE_NODE }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ "pup", CTLTYPE_NODE }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ "udp", CTLTYPE_NODE }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ "idp", CTLTYPE_NODE }, \
}

/*
 * Names for IP sysctl objects
 */
#define	IPCTL_FORWARDING	1	/* act as router */
#define	IPCTL_SENDREDIRECTS	2	/* may send redirects when forwarding */
#define	IPCTL_DEFTTL		3	/* default TTL */
#ifdef notyet
#define	IPCTL_DEFMTU		4	/* default MTU */
#endif
#define	IPCTL_SOURCEROUTE	5	/* may perform source routes */
#define	IPCTL_DIRECTEDBCAST	6	/* default broadcast behavior */
#define IPCTL_IPPORT_FIRSTAUTO	7
#define IPCTL_IPPORT_LASTAUTO	8
#define IPCTL_IPPORT_HIFIRSTAUTO 9
#define IPCTL_IPPORT_HILASTAUTO	10
#define	IPCTL_IPPORT_MAXQUEUE	11
#define	IPCTL_MAXID		12

#define	IPCTL_NAMES { \
	{ 0, 0 }, \
	{ "forwarding", CTLTYPE_INT }, \
	{ "redirect", CTLTYPE_INT }, \
	{ "ttl", CTLTYPE_INT }, \
	{ "mtu", CTLTYPE_INT }, \
	{ "sourceroute", CTLTYPE_INT }, \
	{ "directed-broadcast", CTLTYPE_INT }, \
	{ "portfirst", CTLTYPE_INT }, \
	{ "portlast", CTLTYPE_INT }, \
	{ "porthifirst", CTLTYPE_INT }, \
	{ "porthilast", CTLTYPE_INT }, \
	{ "maxqueue", CTLTYPE_INT }, \
}

#ifndef _KERNEL

#include <sys/cdefs.h>

__BEGIN_DECLS
int	   bindresvport __P((int, struct sockaddr_in *));
__END_DECLS

#else
int	   in_broadcast __P((struct in_addr, struct ifnet *));
int	   in_canforward __P((struct in_addr));
int	   in_cksum __P((struct mbuf *, int));
int	   in_localaddr __P((struct in_addr));
void	   in_socktrim __P((struct sockaddr_in *));
char	  *inet_ntoa __P((struct in_addr));

#define	satosin(sa)	((struct sockaddr_in *)(sa))
#define	sintosa(sin)	((struct sockaddr *)(sin))
#define	ifatoia(ifa)	((struct in_ifaddr *)(ifa))
#endif
#endif /* !_NETINET_IN_H_ */