xref: /illumos-gate/usr/src/boot/include/netinet/in.h (revision 55fea89d)
1 /*-
2  * Copyright (c) 1982, 1986, 1990, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  *	@(#)in.h	8.3 (Berkeley) 1/3/94
30  * $FreeBSD$
31  */
32 
33 #ifndef _NETINET_IN_H_
34 #define	_NETINET_IN_H_
35 
36 #include <sys/cdefs.h>
37 #include <sys/_types.h>
38 #include <machine/endian.h>
39 
40 /* Protocols common to RFC 1700, POSIX, and X/Open. */
41 #define	IPPROTO_IP		0		/* dummy for IP */
42 #define	IPPROTO_ICMP		1		/* control message protocol */
43 #define	IPPROTO_TCP		6		/* tcp */
44 #define	IPPROTO_UDP		17		/* user datagram protocol */
45 
46 #define	INADDR_ANY		((in_addr_t)0x00000000)
47 #define	INADDR_BROADCAST	((in_addr_t)0xffffffff)	/* must be masked */
48 
49 #ifndef _UINT8_T_DECLARED
50 typedef	__uint8_t		uint8_t;
51 #define	_UINT8_T_DECLARED
52 #endif
53 
54 #ifndef _UINT16_T_DECLARED
55 typedef	__uint16_t		uint16_t;
56 #define	_UINT16_T_DECLARED
57 #endif
58 
59 #ifndef _UINT32_T_DECLARED
60 typedef	__uint32_t		uint32_t;
61 #define	_UINT32_T_DECLARED
62 #endif
63 
64 #ifndef _IN_ADDR_T_DECLARED
65 typedef	uint32_t		in_addr_t;
66 #define	_IN_ADDR_T_DECLARED
67 #endif
68 
69 #ifndef _IN_PORT_T_DECLARED
70 typedef	uint16_t		in_port_t;
71 #define	_IN_PORT_T_DECLARED
72 #endif
73 
74 #ifndef _SA_FAMILY_T_DECLARED
75 typedef	__sa_family_t		sa_family_t;
76 #define	_SA_FAMILY_T_DECLARED
77 #endif
78 
79 /* Internet address (a structure for historical reasons). */
80 #ifndef	_STRUCT_IN_ADDR_DECLARED
81 struct in_addr {
82 	in_addr_t s_addr;
83 };
84 #define	_STRUCT_IN_ADDR_DECLARED
85 #endif
86 
87 #ifndef	_SOCKLEN_T_DECLARED
88 typedef	__socklen_t	socklen_t;
89 #define	_SOCKLEN_T_DECLARED
90 #endif
91 
92 #include <sys/_sockaddr_storage.h>
93 
94 /* Socket address, internet style. */
95 struct sockaddr_in {
96 	uint8_t	sin_len;
97 	sa_family_t	sin_family;
98 	in_port_t	sin_port;
99 	struct	in_addr sin_addr;
100 	char	sin_zero[8];
101 };
102 
103 #if !defined(_KERNEL) && __POSIX_VISIBLE >= 200112
104 
105 #ifndef _BYTEORDER_PROTOTYPED
106 #define	_BYTEORDER_PROTOTYPED
107 __BEGIN_DECLS
108 uint32_t	htonl(uint32_t);
109 uint16_t	htons(uint16_t);
110 uint32_t	ntohl(uint32_t);
111 uint16_t	ntohs(uint16_t);
112 __END_DECLS
113 #endif
114 
115 #ifndef _BYTEORDER_FUNC_DEFINED
116 #define	_BYTEORDER_FUNC_DEFINED
117 #define	htonl(x)	__htonl(x)
118 #define	htons(x)	__htons(x)
119 #define	ntohl(x)	__ntohl(x)
120 #define	ntohs(x)	__ntohs(x)
121 #endif
122 
123 #endif /* !_KERNEL && __POSIX_VISIBLE >= 200112 */
124 
125 #if __POSIX_VISIBLE >= 200112
126 #define	IPPROTO_IPV6		41		/* IP6 header */
127 #define	IPPROTO_RAW		255		/* raw IP packet */
128 #define	INET_ADDRSTRLEN		16
129 #endif
130 
131 #if __BSD_VISIBLE
132 /*
133  * Constants and structures defined by the internet system,
134  * Per RFC 790, September 1981, and numerous additions.
135  */
136 
137 /*
138  * Protocols (RFC 1700)
139  */
140 #define	IPPROTO_HOPOPTS		0		/* IP6 hop-by-hop options */
141 #define	IPPROTO_IGMP		2		/* group mgmt protocol */
142 #define	IPPROTO_GGP		3		/* gateway^2 (deprecated) */
143 #define	IPPROTO_IPV4		4		/* IPv4 encapsulation */
144 #define	IPPROTO_IPIP		IPPROTO_IPV4	/* for compatibility */
145 #define	IPPROTO_ST		7		/* Stream protocol II */
146 #define	IPPROTO_EGP		8		/* exterior gateway protocol */
147 #define	IPPROTO_PIGP		9		/* private interior gateway */
148 #define	IPPROTO_RCCMON		10		/* BBN RCC Monitoring */
149 #define	IPPROTO_NVPII		11		/* network voice protocol*/
150 #define	IPPROTO_PUP		12		/* pup */
151 #define	IPPROTO_ARGUS		13		/* Argus */
152 #define	IPPROTO_EMCON		14		/* EMCON */
153 #define	IPPROTO_XNET		15		/* Cross Net Debugger */
154 #define	IPPROTO_CHAOS		16		/* Chaos*/
155 #define	IPPROTO_MUX		18		/* Multiplexing */
156 #define	IPPROTO_MEAS		19		/* DCN Measurement Subsystems */
157 #define	IPPROTO_HMP		20		/* Host Monitoring */
158 #define	IPPROTO_PRM		21		/* Packet Radio Measurement */
159 #define	IPPROTO_IDP		22		/* xns idp */
160 #define	IPPROTO_TRUNK1		23		/* Trunk-1 */
161 #define	IPPROTO_TRUNK2		24		/* Trunk-2 */
162 #define	IPPROTO_LEAF1		25		/* Leaf-1 */
163 #define	IPPROTO_LEAF2		26		/* Leaf-2 */
164 #define	IPPROTO_RDP		27		/* Reliable Data */
165 #define	IPPROTO_IRTP		28		/* Reliable Transaction */
166 #define	IPPROTO_TP		29		/* tp-4 w/ class negotiation */
167 #define	IPPROTO_BLT		30		/* Bulk Data Transfer */
168 #define	IPPROTO_NSP		31		/* Network Services */
169 #define	IPPROTO_INP		32		/* Merit Internodal */
170 #define	IPPROTO_SEP		33		/* Sequential Exchange */
171 #define	IPPROTO_3PC		34		/* Third Party Connect */
172 #define	IPPROTO_IDPR		35		/* InterDomain Policy Routing */
173 #define	IPPROTO_XTP		36		/* XTP */
174 #define	IPPROTO_DDP		37		/* Datagram Delivery */
175 #define	IPPROTO_CMTP		38		/* Control Message Transport */
176 #define	IPPROTO_TPXX		39		/* TP++ Transport */
177 #define	IPPROTO_IL		40		/* IL transport protocol */
178 #define	IPPROTO_SDRP		42		/* Source Demand Routing */
179 #define	IPPROTO_ROUTING		43		/* IP6 routing header */
180 #define	IPPROTO_FRAGMENT	44		/* IP6 fragmentation header */
181 #define	IPPROTO_IDRP		45		/* InterDomain Routing*/
182 #define	IPPROTO_RSVP		46		/* resource reservation */
183 #define	IPPROTO_GRE		47		/* General Routing Encap. */
184 #define	IPPROTO_MHRP		48		/* Mobile Host Routing */
185 #define	IPPROTO_BHA		49		/* BHA */
186 #define	IPPROTO_ESP		50		/* IP6 Encap Sec. Payload */
187 #define	IPPROTO_AH		51		/* IP6 Auth Header */
188 #define	IPPROTO_INLSP		52		/* Integ. Net Layer Security */
189 #define	IPPROTO_SWIPE		53		/* IP with encryption */
190 #define	IPPROTO_NHRP		54		/* Next Hop Resolution */
191 #define	IPPROTO_MOBILE		55		/* IP Mobility */
192 #define	IPPROTO_TLSP		56		/* Transport Layer Security */
193 #define	IPPROTO_SKIP		57		/* SKIP */
194 #define	IPPROTO_ICMPV6		58		/* ICMP6 */
195 #define	IPPROTO_NONE		59		/* IP6 no next header */
196 #define	IPPROTO_DSTOPTS		60		/* IP6 destination option */
197 #define	IPPROTO_AHIP		61		/* any host internal protocol */
198 #define	IPPROTO_CFTP		62		/* CFTP */
199 #define	IPPROTO_HELLO		63		/* "hello" routing protocol */
200 #define	IPPROTO_SATEXPAK	64		/* SATNET/Backroom EXPAK */
201 #define	IPPROTO_KRYPTOLAN	65		/* Kryptolan */
202 #define	IPPROTO_RVD		66		/* Remote Virtual Disk */
203 #define	IPPROTO_IPPC		67		/* Pluribus Packet Core */
204 #define	IPPROTO_ADFS		68		/* Any distributed FS */
205 #define	IPPROTO_SATMON		69		/* Satnet Monitoring */
206 #define	IPPROTO_VISA		70		/* VISA Protocol */
207 #define	IPPROTO_IPCV		71		/* Packet Core Utility */
208 #define	IPPROTO_CPNX		72		/* Comp. Prot. Net. Executive */
209 #define	IPPROTO_CPHB		73		/* Comp. Prot. HeartBeat */
210 #define	IPPROTO_WSN		74		/* Wang Span Network */
211 #define	IPPROTO_PVP		75		/* Packet Video Protocol */
212 #define	IPPROTO_BRSATMON	76		/* BackRoom SATNET Monitoring */
213 #define	IPPROTO_ND		77		/* Sun net disk proto (temp.) */
214 #define	IPPROTO_WBMON		78		/* WIDEBAND Monitoring */
215 #define	IPPROTO_WBEXPAK		79		/* WIDEBAND EXPAK */
216 #define	IPPROTO_EON		80		/* ISO cnlp */
217 #define	IPPROTO_VMTP		81		/* VMTP */
218 #define	IPPROTO_SVMTP		82		/* Secure VMTP */
219 #define	IPPROTO_VINES		83		/* Banyon VINES */
220 #define	IPPROTO_TTP		84		/* TTP */
221 #define	IPPROTO_IGP		85		/* NSFNET-IGP */
222 #define	IPPROTO_DGP		86		/* dissimilar gateway prot. */
223 #define	IPPROTO_TCF		87		/* TCF */
224 #define	IPPROTO_IGRP		88		/* Cisco/GXS IGRP */
225 #define	IPPROTO_OSPFIGP		89		/* OSPFIGP */
226 #define	IPPROTO_SRPC		90		/* Strite RPC protocol */
227 #define	IPPROTO_LARP		91		/* Locus Address Resoloution */
228 #define	IPPROTO_MTP		92		/* Multicast Transport */
229 #define	IPPROTO_AX25		93		/* AX.25 Frames */
230 #define	IPPROTO_IPEIP		94		/* IP encapsulated in IP */
231 #define	IPPROTO_MICP		95		/* Mobile Int.ing control */
232 #define	IPPROTO_SCCSP		96		/* Semaphore Comm. security */
233 #define	IPPROTO_ETHERIP		97		/* Ethernet IP encapsulation */
234 #define	IPPROTO_ENCAP		98		/* encapsulation header */
235 #define	IPPROTO_APES		99		/* any private encr. scheme */
236 #define	IPPROTO_GMTP		100		/* GMTP*/
237 #define	IPPROTO_IPCOMP		108		/* payload compression (IPComp) */
238 #define	IPPROTO_SCTP		132		/* SCTP */
239 #define	IPPROTO_MH		135		/* IPv6 Mobility Header */
240 #define	IPPROTO_UDPLITE		136		/* UDP-Lite */
241 #define	IPPROTO_HIP		139		/* IP6 Host Identity Protocol */
242 #define	IPPROTO_SHIM6		140		/* IP6 Shim6 Protocol */
243 /* 101-254: Partly Unassigned */
244 #define	IPPROTO_PIM		103		/* Protocol Independent Mcast */
245 #define	IPPROTO_CARP		112		/* CARP */
246 #define	IPPROTO_PGM		113		/* PGM */
247 #define	IPPROTO_MPLS		137		/* MPLS-in-IP */
248 #define	IPPROTO_PFSYNC		240		/* PFSYNC */
249 #define	IPPROTO_RESERVED_253	253		/* Reserved */
250 #define	IPPROTO_RESERVED_254	254		/* Reserved */
251 /* 255: Reserved */
252 /* BSD Private, local use, namespace incursion, no longer used */
253 #define	IPPROTO_OLD_DIVERT	254		/* OLD divert pseudo-proto */
254 #define	IPPROTO_MAX		256
255 
256 /* last return value of *_input(), meaning "all job for this pkt is done".  */
257 #define	IPPROTO_DONE		257
258 
259 /* Only used internally, so can be outside the range of valid IP protocols. */
260 #define	IPPROTO_DIVERT		258		/* divert pseudo-protocol */
261 #define	IPPROTO_SEND		259		/* SeND pseudo-protocol */
262 
263 /*
264  * Defined to avoid confusion.  The master value is defined by
265  * PROTO_SPACER in sys/protosw.h.
266  */
267 #define	IPPROTO_SPACER		32767		/* spacer for loadable protos */
268 
269 /*
270  * Local port number conventions:
271  *
272  * When a user does a bind(2) or connect(2) with a port number of zero,
273  * a non-conflicting local port address is chosen.
274  * The default range is IPPORT_HIFIRSTAUTO through
275  * IPPORT_HILASTAUTO, although that is settable by sysctl.
276  *
277  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
278  * default assignment range.
279  *
280  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
281  *
282  * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
283  * into the "high" range.  These are reserved for client outbound connections
284  * which do not want to be filtered by any firewalls.
285  *
286  * The value IP_PORTRANGE_LOW changes the range to the "low" are
287  * that is (by convention) restricted to privileged processes.  This
288  * convention is based on "vouchsafe" principles only.  It is only secure
289  * if you trust the remote host to restrict these ports.
290  *
291  * The default range of ports and the high range can be changed by
292  * sysctl(3).  (net.inet.ip.port{hi,low}{first,last}_auto)
293  *
294  * Changing those values has bad security implications if you are
295  * using a stateless firewall that is allowing packets outside of that
296  * range in order to allow transparent outgoing connections.
297  *
298  * Such a firewall configuration will generally depend on the use of these
299  * default values.  If you change them, you may find your Security
300  * Administrator looking for you with a heavy object.
301  *
302  * For a slightly more orthodox text view on this:
303  *
304  *            ftp://ftp.isi.edu/in-notes/iana/assignments/port-numbers
305  *
306  *    port numbers are divided into three ranges:
307  *
308  *                0 -  1023 Well Known Ports
309  *             1024 - 49151 Registered Ports
310  *            49152 - 65535 Dynamic and/or Private Ports
311  *
312  */
313 
314 /*
315  * Ports < IPPORT_RESERVED are reserved for
316  * privileged processes (e.g. root).         (IP_PORTRANGE_LOW)
317  */
318 #define	IPPORT_RESERVED		1024
319 
320 /*
321  * Default local port range, used by IP_PORTRANGE_DEFAULT
322  */
323 #define IPPORT_EPHEMERALFIRST	10000
324 #define IPPORT_EPHEMERALLAST	65535
325 
326 /*
327  * Dynamic port range, used by IP_PORTRANGE_HIGH.
328  */
329 #define	IPPORT_HIFIRSTAUTO	49152
330 #define	IPPORT_HILASTAUTO	65535
331 
332 /*
333  * Scanning for a free reserved port return a value below IPPORT_RESERVED,
334  * but higher than IPPORT_RESERVEDSTART.  Traditionally the start value was
335  * 512, but that conflicts with some well-known-services that firewalls may
336  * have a fit if we use.
337  */
338 #define	IPPORT_RESERVEDSTART	600
339 
340 #define	IPPORT_MAX		65535
341 
342 /*
343  * Definitions of bits in internet address integers.
344  * On subnets, the decomposition of addresses to host and net parts
345  * is done according to subnet mask, not the masks here.
346  */
347 #define	IN_CLASSA(i)		(((in_addr_t)(i) & 0x80000000) == 0)
348 #define	IN_CLASSA_NET		0xff000000
349 #define	IN_CLASSA_NSHIFT	24
350 #define	IN_CLASSA_HOST		0x00ffffff
351 #define	IN_CLASSA_MAX		128
352 
353 #define	IN_CLASSB(i)		(((in_addr_t)(i) & 0xc0000000) == 0x80000000)
354 #define	IN_CLASSB_NET		0xffff0000
355 #define	IN_CLASSB_NSHIFT	16
356 #define	IN_CLASSB_HOST		0x0000ffff
357 #define	IN_CLASSB_MAX		65536
358 
359 #define	IN_CLASSC(i)		(((in_addr_t)(i) & 0xe0000000) == 0xc0000000)
360 #define	IN_CLASSC_NET		0xffffff00
361 #define	IN_CLASSC_NSHIFT	8
362 #define	IN_CLASSC_HOST		0x000000ff
363 
364 #define	IN_CLASSD(i)		(((in_addr_t)(i) & 0xf0000000) == 0xe0000000)
365 #define	IN_CLASSD_NET		0xf0000000	/* These ones aren't really */
366 #define	IN_CLASSD_NSHIFT	28		/* net and host fields, but */
367 #define	IN_CLASSD_HOST		0x0fffffff	/* routing needn't know.    */
368 #define	IN_MULTICAST(i)		IN_CLASSD(i)
369 
370 #define	IN_EXPERIMENTAL(i)	(((in_addr_t)(i) & 0xf0000000) == 0xf0000000)
371 #define	IN_BADCLASS(i)		(((in_addr_t)(i) & 0xf0000000) == 0xf0000000)
372 
373 #define IN_LINKLOCAL(i)		(((in_addr_t)(i) & 0xffff0000) == 0xa9fe0000)
374 #define IN_LOOPBACK(i)		(((in_addr_t)(i) & 0xff000000) == 0x7f000000)
375 #define IN_ZERONET(i)		(((in_addr_t)(i) & 0xff000000) == 0)
376 
377 #define	IN_PRIVATE(i)	((((in_addr_t)(i) & 0xff000000) == 0x0a000000) || \
378 			 (((in_addr_t)(i) & 0xfff00000) == 0xac100000) || \
379 			 (((in_addr_t)(i) & 0xffff0000) == 0xc0a80000))
380 
381 #define	IN_LOCAL_GROUP(i)	(((in_addr_t)(i) & 0xffffff00) == 0xe0000000)
382 
383 #define	IN_ANY_LOCAL(i)		(IN_LINKLOCAL(i) || IN_LOCAL_GROUP(i))
384 
385 #define	INADDR_LOOPBACK		((in_addr_t)0x7f000001)
386 #ifndef _KERNEL
387 #define	INADDR_NONE		((in_addr_t)0xffffffff)	/* -1 return */
388 #endif
389 
390 #define	INADDR_UNSPEC_GROUP	((in_addr_t)0xe0000000)	/* 224.0.0.0 */
391 #define	INADDR_ALLHOSTS_GROUP	((in_addr_t)0xe0000001)	/* 224.0.0.1 */
392 #define	INADDR_ALLRTRS_GROUP	((in_addr_t)0xe0000002)	/* 224.0.0.2 */
393 #define	INADDR_ALLRPTS_GROUP	((in_addr_t)0xe0000016)	/* 224.0.0.22, IGMPv3 */
394 #define	INADDR_CARP_GROUP	((in_addr_t)0xe0000012)	/* 224.0.0.18 */
395 #define	INADDR_PFSYNC_GROUP	((in_addr_t)0xe00000f0)	/* 224.0.0.240 */
396 #define	INADDR_ALLMDNS_GROUP	((in_addr_t)0xe00000fb)	/* 224.0.0.251 */
397 #define	INADDR_MAX_LOCAL_GROUP	((in_addr_t)0xe00000ff)	/* 224.0.0.255 */
398 
399 #define	IN_LOOPBACKNET		127			/* official! */
400 
401 #define	IN_RFC3021_MASK		((in_addr_t)0xfffffffe)
402 
403 /*
404  * Options for use with [gs]etsockopt at the IP level.
405  * First word of comment is data type; bool is stored in int.
406  */
407 #define	IP_OPTIONS		1    /* buf/ip_opts; set/get IP options */
408 #define	IP_HDRINCL		2    /* int; header is included with data */
409 #define	IP_TOS			3    /* int; IP type of service and preced. */
410 #define	IP_TTL			4    /* int; IP time to live */
411 #define	IP_RECVOPTS		5    /* bool; receive all IP opts w/dgram */
412 #define	IP_RECVRETOPTS		6    /* bool; receive IP opts for response */
413 #define	IP_RECVDSTADDR		7    /* bool; receive IP dst addr w/dgram */
414 #define	IP_SENDSRCADDR		IP_RECVDSTADDR /* cmsg_type to set src addr */
415 #define	IP_RETOPTS		8    /* ip_opts; set/get IP options */
416 #define	IP_MULTICAST_IF		9    /* struct in_addr *or* struct ip_mreqn;
417 				      * set/get IP multicast i/f  */
418 #define	IP_MULTICAST_TTL	10   /* u_char; set/get IP multicast ttl */
419 #define	IP_MULTICAST_LOOP	11   /* u_char; set/get IP multicast loopback */
420 #define	IP_ADD_MEMBERSHIP	12   /* ip_mreq; add an IP group membership */
421 #define	IP_DROP_MEMBERSHIP	13   /* ip_mreq; drop an IP group membership */
422 #define	IP_MULTICAST_VIF	14   /* set/get IP mcast virt. iface */
423 #define	IP_RSVP_ON		15   /* enable RSVP in kernel */
424 #define	IP_RSVP_OFF		16   /* disable RSVP in kernel */
425 #define	IP_RSVP_VIF_ON		17   /* set RSVP per-vif socket */
426 #define	IP_RSVP_VIF_OFF		18   /* unset RSVP per-vif socket */
427 #define	IP_PORTRANGE		19   /* int; range to choose for unspec port */
428 #define	IP_RECVIF		20   /* bool; receive reception if w/dgram */
429 /* for IPSEC */
430 #define	IP_IPSEC_POLICY		21   /* int; set/get security policy */
431 				     /* unused; was IP_FAITH */
432 #define	IP_ONESBCAST		23   /* bool: send all-ones broadcast */
433 #define	IP_BINDANY		24   /* bool: allow bind to any address */
434 #define	IP_BINDMULTI		25   /* bool: allow multiple listeners on a tuple */
435 #define	IP_RSS_LISTEN_BUCKET	26   /* int; set RSS listen bucket */
436 
437 /*
438  * Options for controlling the firewall and dummynet.
439  * Historical options (from 40 to 64) will eventually be
440  * replaced by only two options, IP_FW3 and IP_DUMMYNET3.
441  */
442 #define	IP_FW_TABLE_ADD		40   /* add entry */
443 #define	IP_FW_TABLE_DEL		41   /* delete entry */
444 #define	IP_FW_TABLE_FLUSH	42   /* flush table */
445 #define	IP_FW_TABLE_GETSIZE	43   /* get table size */
446 #define	IP_FW_TABLE_LIST	44   /* list table contents */
447 
448 #define	IP_FW3			48   /* generic ipfw v.3 sockopts */
449 #define	IP_DUMMYNET3		49   /* generic dummynet v.3 sockopts */
450 
451 #define	IP_FW_ADD		50   /* add a firewall rule to chain */
452 #define	IP_FW_DEL		51   /* delete a firewall rule from chain */
453 #define	IP_FW_FLUSH		52   /* flush firewall rule chain */
454 #define	IP_FW_ZERO		53   /* clear single/all firewall counter(s) */
455 #define	IP_FW_GET		54   /* get entire firewall rule chain */
456 #define	IP_FW_RESETLOG		55   /* reset logging counters */
457 
458 #define IP_FW_NAT_CFG           56   /* add/config a nat rule */
459 #define IP_FW_NAT_DEL           57   /* delete a nat rule */
460 #define IP_FW_NAT_GET_CONFIG    58   /* get configuration of a nat rule */
461 #define IP_FW_NAT_GET_LOG       59   /* get log of a nat rule */
462 
463 #define	IP_DUMMYNET_CONFIGURE	60   /* add/configure a dummynet pipe */
464 #define	IP_DUMMYNET_DEL		61   /* delete a dummynet pipe from chain */
465 #define	IP_DUMMYNET_FLUSH	62   /* flush dummynet */
466 #define	IP_DUMMYNET_GET		64   /* get entire dummynet pipes */
467 
468 #define	IP_RECVTTL		65   /* bool; receive IP TTL w/dgram */
469 #define	IP_MINTTL		66   /* minimum TTL for packet or drop */
470 #define	IP_DONTFRAG		67   /* don't fragment packet */
471 #define	IP_RECVTOS		68   /* bool; receive IP TOS w/dgram */
472 
473 /* IPv4 Source Filter Multicast API [RFC3678] */
474 #define	IP_ADD_SOURCE_MEMBERSHIP	70   /* join a source-specific group */
475 #define	IP_DROP_SOURCE_MEMBERSHIP	71   /* drop a single source */
476 #define	IP_BLOCK_SOURCE			72   /* block a source */
477 #define	IP_UNBLOCK_SOURCE		73   /* unblock a source */
478 
479 /* The following option is private; do not use it from user applications. */
480 #define	IP_MSFILTER			74   /* set/get filter list */
481 
482 /* Protocol Independent Multicast API [RFC3678] */
483 #define	MCAST_JOIN_GROUP		80   /* join an any-source group */
484 #define	MCAST_LEAVE_GROUP		81   /* leave all sources for group */
485 #define	MCAST_JOIN_SOURCE_GROUP		82   /* join a source-specific group */
486 #define	MCAST_LEAVE_SOURCE_GROUP	83   /* leave a single source */
487 #define	MCAST_BLOCK_SOURCE		84   /* block a source */
488 #define	MCAST_UNBLOCK_SOURCE		85   /* unblock a source */
489 
490 /* Flow and RSS definitions */
491 #define	IP_FLOWID		90   /* get flow id for the given socket/inp */
492 #define	IP_FLOWTYPE		91   /* get flow type (M_HASHTYPE) */
493 #define	IP_RSSBUCKETID		92   /* get RSS flowid -> bucket mapping */
494 #define	IP_RECVFLOWID		93   /* bool; receive IP flowid/flowtype w/ datagram */
495 #define	IP_RECVRSSBUCKETID	94   /* bool; receive IP RSS bucket id w/ datagram */
496 
497 /*
498  * Defaults and limits for options
499  */
500 #define	IP_DEFAULT_MULTICAST_TTL  1	/* normally limit m'casts to 1 hop  */
501 #define	IP_DEFAULT_MULTICAST_LOOP 1	/* normally hear sends if a member  */
502 
503 /*
504  * The imo_membership vector for each socket is now dynamically allocated at
505  * run-time, bounded by USHRT_MAX, and is reallocated when needed, sized
506  * according to a power-of-two increment.
507  */
508 #define	IP_MIN_MEMBERSHIPS	31
509 #define	IP_MAX_MEMBERSHIPS	4095
510 #define	IP_MAX_SOURCE_FILTER	1024	/* XXX to be unused */
511 
512 /*
513  * Default resource limits for IPv4 multicast source filtering.
514  * These may be modified by sysctl.
515  */
516 #define	IP_MAX_GROUP_SRC_FILTER		512	/* sources per group */
517 #define	IP_MAX_SOCK_SRC_FILTER		128	/* sources per socket/group */
518 #define	IP_MAX_SOCK_MUTE_FILTER		128	/* XXX no longer used */
519 
520 /*
521  * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
522  */
523 struct ip_mreq {
524 	struct	in_addr imr_multiaddr;	/* IP multicast address of group */
525 	struct	in_addr imr_interface;	/* local IP address of interface */
526 };
527 
528 /*
529  * Modified argument structure for IP_MULTICAST_IF, obtained from Linux.
530  * This is used to specify an interface index for multicast sends, as
531  * the IPv4 legacy APIs do not support this (unless IP_SENDIF is available).
532  */
533 struct ip_mreqn {
534 	struct	in_addr imr_multiaddr;	/* IP multicast address of group */
535 	struct	in_addr imr_address;	/* local IP address of interface */
536 	int		imr_ifindex;	/* Interface index; cast to uint32_t */
537 };
538 
539 /*
540  * Argument structure for IPv4 Multicast Source Filter APIs. [RFC3678]
541  */
542 struct ip_mreq_source {
543 	struct	in_addr imr_multiaddr;	/* IP multicast address of group */
544 	struct	in_addr imr_sourceaddr;	/* IP address of source */
545 	struct	in_addr imr_interface;	/* local IP address of interface */
546 };
547 
548 /*
549  * Argument structures for Protocol-Independent Multicast Source
550  * Filter APIs. [RFC3678]
551  */
552 struct group_req {
553 	uint32_t		gr_interface;	/* interface index */
554 	struct sockaddr_storage	gr_group;	/* group address */
555 };
556 
557 struct group_source_req {
558 	uint32_t		gsr_interface;	/* interface index */
559 	struct sockaddr_storage	gsr_group;	/* group address */
560 	struct sockaddr_storage	gsr_source;	/* source address */
561 };
562 
563 #ifndef __MSFILTERREQ_DEFINED
564 #define __MSFILTERREQ_DEFINED
565 /*
566  * The following structure is private; do not use it from user applications.
567  * It is used to communicate IP_MSFILTER/IPV6_MSFILTER information between
568  * the RFC 3678 libc functions and the kernel.
569  */
570 struct __msfilterreq {
571 	uint32_t		 msfr_ifindex;	/* interface index */
572 	uint32_t		 msfr_fmode;	/* filter mode for group */
573 	uint32_t		 msfr_nsrcs;	/* # of sources in msfr_srcs */
574 	struct sockaddr_storage	 msfr_group;	/* group address */
575 	struct sockaddr_storage	*msfr_srcs;	/* pointer to the first member
576 						 * of a contiguous array of
577 						 * sources to filter in full.
578 						 */
579 };
580 #endif
581 
582 struct sockaddr;
583 
584 /*
585  * Advanced (Full-state) APIs [RFC3678]
586  * The RFC specifies uint_t for the 6th argument to [sg]etsourcefilter().
587  * We use uint32_t here to be consistent.
588  */
589 int	setipv4sourcefilter(int, struct in_addr, struct in_addr, uint32_t,
590 	    uint32_t, struct in_addr *);
591 int	getipv4sourcefilter(int, struct in_addr, struct in_addr, uint32_t *,
592 	    uint32_t *, struct in_addr *);
593 int	setsourcefilter(int, uint32_t, struct sockaddr *, socklen_t,
594 	    uint32_t, uint32_t, struct sockaddr_storage *);
595 int	getsourcefilter(int, uint32_t, struct sockaddr *, socklen_t,
596 	    uint32_t *, uint32_t *, struct sockaddr_storage *);
597 
598 /*
599  * Filter modes; also used to represent per-socket filter mode internally.
600  */
601 #define	MCAST_UNDEFINED	0	/* fmode: not yet defined */
602 #define	MCAST_INCLUDE	1	/* fmode: include these source(s) */
603 #define	MCAST_EXCLUDE	2	/* fmode: exclude these source(s) */
604 
605 /*
606  * Argument for IP_PORTRANGE:
607  * - which range to search when port is unspecified at bind() or connect()
608  */
609 #define	IP_PORTRANGE_DEFAULT	0	/* default range */
610 #define	IP_PORTRANGE_HIGH	1	/* "high" - request firewall bypass */
611 #define	IP_PORTRANGE_LOW	2	/* "low" - vouchsafe security */
612 
613 /*
614  * Identifiers for IP sysctl nodes
615  */
616 #define	IPCTL_FORWARDING	1	/* act as router */
617 #define	IPCTL_SENDREDIRECTS	2	/* may send redirects when forwarding */
618 #define	IPCTL_DEFTTL		3	/* default TTL */
619 #ifdef notyet
620 #define	IPCTL_DEFMTU		4	/* default MTU */
621 #endif
622 /*	IPCTL_RTEXPIRE		5	deprecated */
623 /*	IPCTL_RTMINEXPIRE	6	deprecated */
624 /*	IPCTL_RTMAXCACHE	7	deprecated */
625 #define	IPCTL_SOURCEROUTE	8	/* may perform source routes */
626 #define	IPCTL_DIRECTEDBROADCAST	9	/* may re-broadcast received packets */
627 #define	IPCTL_INTRQMAXLEN	10	/* max length of netisr queue */
628 #define	IPCTL_INTRQDROPS	11	/* number of netisr q drops */
629 #define	IPCTL_STATS		12	/* ipstat structure */
630 #define	IPCTL_ACCEPTSOURCEROUTE	13	/* may accept source routed packets */
631 #define	IPCTL_FASTFORWARDING	14	/* use fast IP forwarding code */
632 					/* 15, unused, was: IPCTL_KEEPFAITH  */
633 #define	IPCTL_GIF_TTL		16	/* default TTL for gif encap packet */
634 
635 #endif /* __BSD_VISIBLE */
636 
637 #ifdef _KERNEL
638 
639 struct ifnet; struct mbuf;	/* forward declarations for Standard C */
640 
641 int	 in_broadcast(struct in_addr, struct ifnet *);
642 int	 in_canforward(struct in_addr);
643 int	 in_localaddr(struct in_addr);
644 int	 in_localip(struct in_addr);
645 int	 in_ifhasaddr(struct ifnet *, struct in_addr);
646 int	 inet_aton(const char *, struct in_addr *); /* in libkern */
647 char	*inet_ntoa(struct in_addr); /* in libkern */
648 char	*inet_ntoa_r(struct in_addr ina, char *buf); /* in libkern */
649 char	*inet_ntop(int, const void *, char *, socklen_t); /* in libkern */
650 int	 inet_pton(int af, const char *, void *); /* in libkern */
651 void	 in_ifdetach(struct ifnet *);
652 
653 #define	in_hosteq(s, t)	((s).s_addr == (t).s_addr)
654 #define	in_nullhost(x)	((x).s_addr == INADDR_ANY)
655 #define	in_allhosts(x)	((x).s_addr == htonl(INADDR_ALLHOSTS_GROUP))
656 
657 #define	satosin(sa)	((struct sockaddr_in *)(sa))
658 #define	sintosa(sin)	((struct sockaddr *)(sin))
659 #define	ifatoia(ifa)	((struct in_ifaddr *)(ifa))
660 #endif /* _KERNEL */
661 
662 /* INET6 stuff */
663 #if __POSIX_VISIBLE >= 200112
664 #define	__KAME_NETINET_IN_H_INCLUDED_
665 #include <netinet6/in6.h>
666 #undef __KAME_NETINET_IN_H_INCLUDED_
667 #endif
668 
669 #endif /* !_NETINET_IN_H_*/
670