1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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
32 #ifndef _NETINET_IN_H_
33 #define _NETINET_IN_H_
34
35 #include <sys/cdefs.h>
36 #include <sys/_types.h>
37 #include <machine/endian.h>
38
39 /* Protocols common to RFC 1700, POSIX, and X/Open. */
40 #define IPPROTO_IP 0 /* dummy for IP */
41 #define IPPROTO_ICMP 1 /* control message protocol */
42 #define IPPROTO_TCP 6 /* tcp */
43 #define IPPROTO_UDP 17 /* user datagram protocol */
44
45 #define INADDR_ANY ((in_addr_t)0x00000000)
46 #define INADDR_BROADCAST ((in_addr_t)0xffffffff) /* must be masked */
47
48 #ifndef _UINT8_T_DECLARED
49 typedef __uint8_t uint8_t;
50 #define _UINT8_T_DECLARED
51 #endif
52
53 #ifndef _UINT16_T_DECLARED
54 typedef __uint16_t uint16_t;
55 #define _UINT16_T_DECLARED
56 #endif
57
58 #ifndef _UINT32_T_DECLARED
59 typedef __uint32_t uint32_t;
60 #define _UINT32_T_DECLARED
61 #endif
62
63 #ifndef _IN_ADDR_T_DECLARED
64 typedef uint32_t in_addr_t;
65 #define _IN_ADDR_T_DECLARED
66 #endif
67
68 #ifndef _IN_PORT_T_DECLARED
69 typedef uint16_t in_port_t;
70 #define _IN_PORT_T_DECLARED
71 #endif
72
73 #ifndef _SA_FAMILY_T_DECLARED
74 typedef __sa_family_t sa_family_t;
75 #define _SA_FAMILY_T_DECLARED
76 #endif
77
78 /* Internet address (a structure for historical reasons). */
79 #ifndef _STRUCT_IN_ADDR_DECLARED
80 struct in_addr {
81 in_addr_t s_addr;
82 };
83 #define _STRUCT_IN_ADDR_DECLARED
84 #endif
85
86 #ifndef _SOCKLEN_T_DECLARED
87 typedef __socklen_t socklen_t;
88 #define _SOCKLEN_T_DECLARED
89 #endif
90
91 #include <sys/_sockaddr_storage.h>
92
93 /* Socket address, internet style. */
94 struct sockaddr_in {
95 uint8_t sin_len;
96 sa_family_t sin_family;
97 in_port_t sin_port;
98 struct in_addr sin_addr;
99 char sin_zero[8];
100 };
101
102 #if !defined(_KERNEL) && __POSIX_VISIBLE >= 200112
103
104 #ifndef _BYTEORDER_PROTOTYPED
105 #define _BYTEORDER_PROTOTYPED
106 __BEGIN_DECLS
107 uint32_t htonl(uint32_t);
108 uint16_t htons(uint16_t);
109 uint32_t ntohl(uint32_t);
110 uint16_t ntohs(uint16_t);
111 __END_DECLS
112 #endif
113
114 #ifndef _BYTEORDER_FUNC_DEFINED
115 #define _BYTEORDER_FUNC_DEFINED
116 #define htonl(x) __htonl(x)
117 #define htons(x) __htons(x)
118 #define ntohl(x) __ntohl(x)
119 #define ntohs(x) __ntohs(x)
120 #endif
121
122 #endif /* !_KERNEL && __POSIX_VISIBLE >= 200112 */
123
124 #if __POSIX_VISIBLE >= 200112
125 #define IPPROTO_IPV6 41 /* IP6 header */
126 #define IPPROTO_RAW 255 /* raw IP packet */
127 #define INET_ADDRSTRLEN 16
128 #endif
129
130 #if __BSD_VISIBLE
131 /*
132 * Constants and structures defined by the internet system,
133 * Per RFC 790, September 1981, and numerous additions.
134 */
135
136 /*
137 * Protocols (RFC 1700)
138 */
139 #define IPPROTO_HOPOPTS 0 /* IP6 hop-by-hop options */
140 #define IPPROTO_IGMP 2 /* group mgmt protocol */
141 #define IPPROTO_GGP 3 /* gateway^2 (deprecated) */
142 #define IPPROTO_IPV4 4 /* IPv4 encapsulation */
143 #define IPPROTO_IPIP IPPROTO_IPV4 /* for compatibility */
144 #define IPPROTO_ST 7 /* Stream protocol II */
145 #define IPPROTO_EGP 8 /* exterior gateway protocol */
146 #define IPPROTO_PIGP 9 /* private interior gateway */
147 #define IPPROTO_RCCMON 10 /* BBN RCC Monitoring */
148 #define IPPROTO_NVPII 11 /* network voice protocol*/
149 #define IPPROTO_PUP 12 /* pup */
150 #define IPPROTO_ARGUS 13 /* Argus */
151 #define IPPROTO_EMCON 14 /* EMCON */
152 #define IPPROTO_XNET 15 /* Cross Net Debugger */
153 #define IPPROTO_CHAOS 16 /* Chaos*/
154 #define IPPROTO_MUX 18 /* Multiplexing */
155 #define IPPROTO_MEAS 19 /* DCN Measurement Subsystems */
156 #define IPPROTO_HMP 20 /* Host Monitoring */
157 #define IPPROTO_PRM 21 /* Packet Radio Measurement */
158 #define IPPROTO_IDP 22 /* xns idp */
159 #define IPPROTO_TRUNK1 23 /* Trunk-1 */
160 #define IPPROTO_TRUNK2 24 /* Trunk-2 */
161 #define IPPROTO_LEAF1 25 /* Leaf-1 */
162 #define IPPROTO_LEAF2 26 /* Leaf-2 */
163 #define IPPROTO_RDP 27 /* Reliable Data */
164 #define IPPROTO_IRTP 28 /* Reliable Transaction */
165 #define IPPROTO_TP 29 /* tp-4 w/ class negotiation */
166 #define IPPROTO_BLT 30 /* Bulk Data Transfer */
167 #define IPPROTO_NSP 31 /* Network Services */
168 #define IPPROTO_INP 32 /* Merit Internodal */
169 #define IPPROTO_DCCP 33 /* Datagram Congestion Control Protocol */
170 #define IPPROTO_3PC 34 /* Third Party Connect */
171 #define IPPROTO_IDPR 35 /* InterDomain Policy Routing */
172 #define IPPROTO_XTP 36 /* XTP */
173 #define IPPROTO_DDP 37 /* Datagram Delivery */
174 #define IPPROTO_CMTP 38 /* Control Message Transport */
175 #define IPPROTO_TPXX 39 /* TP++ Transport */
176 #define IPPROTO_IL 40 /* IL transport protocol */
177 #define IPPROTO_SDRP 42 /* Source Demand Routing */
178 #define IPPROTO_ROUTING 43 /* IP6 routing header */
179 #define IPPROTO_FRAGMENT 44 /* IP6 fragmentation header */
180 #define IPPROTO_IDRP 45 /* InterDomain Routing*/
181 #define IPPROTO_RSVP 46 /* resource reservation */
182 #define IPPROTO_GRE 47 /* General Routing Encap. */
183 #define IPPROTO_MHRP 48 /* Mobile Host Routing */
184 #define IPPROTO_BHA 49 /* BHA */
185 #define IPPROTO_ESP 50 /* IP6 Encap Sec. Payload */
186 #define IPPROTO_AH 51 /* IP6 Auth Header */
187 #define IPPROTO_INLSP 52 /* Integ. Net Layer Security */
188 #define IPPROTO_SWIPE 53 /* IP with encryption */
189 #define IPPROTO_NHRP 54 /* Next Hop Resolution */
190 #define IPPROTO_MOBILE 55 /* IP Mobility */
191 #define IPPROTO_TLSP 56 /* Transport Layer Security */
192 #define IPPROTO_SKIP 57 /* SKIP */
193 #define IPPROTO_ICMPV6 58 /* ICMP6 */
194 #define IPPROTO_NONE 59 /* IP6 no next header */
195 #define IPPROTO_DSTOPTS 60 /* IP6 destination option */
196 #define IPPROTO_AHIP 61 /* any host internal protocol */
197 #define IPPROTO_CFTP 62 /* CFTP */
198 #define IPPROTO_HELLO 63 /* "hello" routing protocol */
199 #define IPPROTO_SATEXPAK 64 /* SATNET/Backroom EXPAK */
200 #define IPPROTO_KRYPTOLAN 65 /* Kryptolan */
201 #define IPPROTO_RVD 66 /* Remote Virtual Disk */
202 #define IPPROTO_IPPC 67 /* Pluribus Packet Core */
203 #define IPPROTO_ADFS 68 /* Any distributed FS */
204 #define IPPROTO_SATMON 69 /* Satnet Monitoring */
205 #define IPPROTO_VISA 70 /* VISA Protocol */
206 #define IPPROTO_IPCV 71 /* Packet Core Utility */
207 #define IPPROTO_CPNX 72 /* Comp. Prot. Net. Executive */
208 #define IPPROTO_CPHB 73 /* Comp. Prot. HeartBeat */
209 #define IPPROTO_WSN 74 /* Wang Span Network */
210 #define IPPROTO_PVP 75 /* Packet Video Protocol */
211 #define IPPROTO_BRSATMON 76 /* BackRoom SATNET Monitoring */
212 #define IPPROTO_ND 77 /* Sun net disk proto (temp.) */
213 #define IPPROTO_WBMON 78 /* WIDEBAND Monitoring */
214 #define IPPROTO_WBEXPAK 79 /* WIDEBAND EXPAK */
215 #define IPPROTO_EON 80 /* ISO cnlp */
216 #define IPPROTO_VMTP 81 /* VMTP */
217 #define IPPROTO_SVMTP 82 /* Secure VMTP */
218 #define IPPROTO_VINES 83 /* Banyon VINES */
219 #define IPPROTO_TTP 84 /* TTP */
220 #define IPPROTO_IGP 85 /* NSFNET-IGP */
221 #define IPPROTO_DGP 86 /* dissimilar gateway prot. */
222 #define IPPROTO_TCF 87 /* TCF */
223 #define IPPROTO_IGRP 88 /* Cisco/GXS IGRP */
224 #define IPPROTO_OSPFIGP 89 /* OSPFIGP */
225 #define IPPROTO_SRPC 90 /* Strite RPC protocol */
226 #define IPPROTO_LARP 91 /* Locus Address Resoloution */
227 #define IPPROTO_MTP 92 /* Multicast Transport */
228 #define IPPROTO_AX25 93 /* AX.25 Frames */
229 #define IPPROTO_IPEIP 94 /* IP encapsulated in IP */
230 #define IPPROTO_MICP 95 /* Mobile Int.ing control */
231 #define IPPROTO_SCCSP 96 /* Semaphore Comm. security */
232 #define IPPROTO_ETHERIP 97 /* Ethernet IP encapsulation */
233 #define IPPROTO_ENCAP 98 /* encapsulation header */
234 #define IPPROTO_APES 99 /* any private encr. scheme */
235 #define IPPROTO_GMTP 100 /* GMTP*/
236 #define IPPROTO_IPCOMP 108 /* payload compression (IPComp) */
237 #define IPPROTO_SCTP 132 /* SCTP */
238 #define IPPROTO_MH 135 /* IPv6 Mobility Header */
239 #define IPPROTO_UDPLITE 136 /* UDP-Lite */
240 #define IPPROTO_HIP 139 /* IP6 Host Identity Protocol */
241 #define IPPROTO_SHIM6 140 /* IP6 Shim6 Protocol */
242 /* 101-254: Partly Unassigned */
243 #define IPPROTO_PIM 103 /* Protocol Independent Mcast */
244 #define IPPROTO_CARP 112 /* CARP */
245 #define IPPROTO_PGM 113 /* PGM */
246 #define IPPROTO_MPLS 137 /* MPLS-in-IP */
247 #define IPPROTO_PFSYNC 240 /* PFSYNC */
248 #define IPPROTO_RESERVED_253 253 /* Reserved */
249 #define IPPROTO_RESERVED_254 254 /* Reserved */
250 /* 255: Reserved */
251 #define IPPROTO_MAX 256
252
253 /* last return value of *_input(), meaning "all job for this pkt is done". */
254 #define IPPROTO_DONE 257
255
256 /* Only used internally, so can be outside the range of valid IP protocols. */
257 #define IPPROTO_SEND 259 /* SeND pseudo-protocol */
258
259 /*
260 * Defined to avoid confusion. The master value is defined by
261 * PROTO_SPACER in sys/protosw.h.
262 */
263 #define IPPROTO_SPACER 32767 /* spacer for loadable protos */
264
265 /*
266 * Local port number conventions:
267 *
268 * When a user does a bind(2) or connect(2) with a port number of zero,
269 * a non-conflicting local port address is chosen.
270 * The default range is IPPORT_HIFIRSTAUTO through
271 * IPPORT_HILASTAUTO, although that is settable by sysctl.
272 *
273 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
274 * default assignment range.
275 *
276 * The value IP_PORTRANGE_DEFAULT causes the default behavior.
277 *
278 * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
279 * into the "high" range. These are reserved for client outbound connections
280 * which do not want to be filtered by any firewalls.
281 *
282 * The value IP_PORTRANGE_LOW changes the range to the "low" are
283 * that is (by convention) restricted to privileged processes. This
284 * convention is based on "vouchsafe" principles only. It is only secure
285 * if you trust the remote host to restrict these ports.
286 *
287 * The default range of ports and the high range can be changed by
288 * sysctl(3). (net.inet.ip.portrange.{hi,low,}{first,last})
289 *
290 * Changing those values has bad security implications if you are
291 * using a stateless firewall that is allowing packets outside of that
292 * range in order to allow transparent outgoing connections.
293 *
294 * Such a firewall configuration will generally depend on the use of these
295 * default values. If you change them, you may find your Security
296 * Administrator looking for you with a heavy object.
297 *
298 * For a slightly more orthodox text view on this:
299 *
300 * ftp://ftp.isi.edu/in-notes/iana/assignments/port-numbers
301 *
302 * port numbers are divided into three ranges:
303 *
304 * 0 - 1023 Well Known Ports
305 * 1024 - 49151 Registered Ports
306 * 49152 - 65535 Dynamic and/or Private Ports
307 *
308 */
309
310 /*
311 * Ports < IPPORT_RESERVED are reserved for
312 * privileged processes (e.g. root). (IP_PORTRANGE_LOW)
313 */
314 #define IPPORT_RESERVED 1024
315
316 /*
317 * Default local port range, used by IP_PORTRANGE_DEFAULT
318 */
319 #define IPPORT_EPHEMERALFIRST 10000
320 #define IPPORT_EPHEMERALLAST 65535
321
322 /*
323 * Dynamic port range, used by IP_PORTRANGE_HIGH.
324 */
325 #define IPPORT_HIFIRSTAUTO 49152
326 #define IPPORT_HILASTAUTO 65535
327
328 /*
329 * Scanning for a free reserved port return a value below IPPORT_RESERVED,
330 * but higher than IPPORT_RESERVEDSTART. Traditionally the start value was
331 * 512, but that conflicts with some well-known-services that firewalls may
332 * have a fit if we use.
333 */
334 #define IPPORT_RESERVEDSTART 600
335
336 #define IPPORT_MAX 65535
337
338 /*
339 * Historical definitions of bits in internet address integers
340 * (pre-CIDR). Class A/B/C are long obsolete, and now deprecated.
341 * Hide these definitions from the kernel unless IN_HISTORICAL_NETS
342 * is defined. Provide the historical definitions to user level for now.
343 */
344 #ifndef _KERNEL
345 #define IN_HISTORICAL_NETS
346 #endif
347 #ifdef IN_HISTORICAL_NETS
348 #define IN_CLASSA(i) (((in_addr_t)(i) & 0x80000000) == 0)
349 #define IN_CLASSA_NET 0xff000000
350 #define IN_CLASSA_NSHIFT 24
351 #define IN_CLASSA_HOST 0x00ffffff
352 #define IN_CLASSA_MAX 128
353
354 #define IN_CLASSB(i) (((in_addr_t)(i) & 0xc0000000) == 0x80000000)
355 #define IN_CLASSB_NET 0xffff0000
356 #define IN_CLASSB_NSHIFT 16
357 #define IN_CLASSB_HOST 0x0000ffff
358 #define IN_CLASSB_MAX 65536
359
360 #define IN_CLASSC(i) (((in_addr_t)(i) & 0xe0000000) == 0xc0000000)
361 #define IN_CLASSC_NET 0xffffff00
362 #define IN_CLASSC_NSHIFT 8
363 #define IN_CLASSC_HOST 0x000000ff
364 #endif /* IN_HISTORICAL_NETS */
365
366 #define IN_NETMASK_DEFAULT 0xffffff00 /* mask when forced to guess */
367
368 #define IN_MULTICAST(i) (((in_addr_t)(i) & 0xf0000000) == 0xe0000000)
369 #ifdef IN_HISTORICAL_NETS
370 #define IN_CLASSD(i) IN_MULTICAST(i)
371 #define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */
372 #define IN_CLASSD_NSHIFT 28 /* net and host fields, but */
373 #define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */
374 #endif /* IN_HISTORICAL_NETS */
375
376 #define IN_EXPERIMENTAL(i) (((in_addr_t)(i) & 0xf0000000) == 0xf0000000)
377 #define IN_BADCLASS(i) (((in_addr_t)(i) & 0xf0000000) == 0xf0000000)
378
379 #define IN_LINKLOCAL(i) (((in_addr_t)(i) & 0xffff0000) == 0xa9fe0000)
380 #ifdef _KERNEL
381 #define IN_LOOPBACK(i) \
382 (((in_addr_t)(i) & V_in_loopback_mask) == 0x7f000000)
383 #define IN_LOOPBACK_MASK_DFLT 0xff000000
384 #else
385 #define IN_LOOPBACK(i) (((in_addr_t)(i) & 0xff000000) == 0x7f000000)
386 #endif
387 #define IN_ZERONET(i) (((in_addr_t)(i) & 0xff000000) == 0)
388
389 #define IN_PRIVATE(i) ((((in_addr_t)(i) & 0xff000000) == 0x0a000000) || \
390 (((in_addr_t)(i) & 0xfff00000) == 0xac100000) || \
391 (((in_addr_t)(i) & 0xffff0000) == 0xc0a80000))
392
393 #define IN_LOCAL_GROUP(i) (((in_addr_t)(i) & 0xffffff00) == 0xe0000000)
394
395 #define IN_ANY_LOCAL(i) (IN_LINKLOCAL(i) || IN_LOCAL_GROUP(i))
396
397 #define INADDR_LOOPBACK ((in_addr_t)0x7f000001)
398 #ifndef _KERNEL
399 #define INADDR_NONE ((in_addr_t)0xffffffff) /* -1 return */
400 #endif
401
402 #define INADDR_UNSPEC_GROUP ((in_addr_t)0xe0000000) /* 224.0.0.0 */
403 #define INADDR_ALLHOSTS_GROUP ((in_addr_t)0xe0000001) /* 224.0.0.1 */
404 #define INADDR_ALLRTRS_GROUP ((in_addr_t)0xe0000002) /* 224.0.0.2 */
405 #define INADDR_ALLRPTS_GROUP ((in_addr_t)0xe0000016) /* 224.0.0.22, IGMPv3 */
406 #define INADDR_CARP_GROUP ((in_addr_t)0xe0000012) /* 224.0.0.18 */
407 #define INADDR_PFSYNC_GROUP ((in_addr_t)0xe00000f0) /* 224.0.0.240 */
408 #define INADDR_ALLMDNS_GROUP ((in_addr_t)0xe00000fb) /* 224.0.0.251 */
409 #define INADDR_MAX_LOCAL_GROUP ((in_addr_t)0xe00000ff) /* 224.0.0.255 */
410
411 #ifdef IN_HISTORICAL_NETS
412 #define IN_LOOPBACKNET 127 /* official! */
413 #endif /* IN_HISTORICAL_NETS */
414
415 #define IN_RFC3021_MASK ((in_addr_t)0xfffffffe)
416
417 #ifdef _KERNEL
418 #include <net/vnet.h>
419
420 VNET_DECLARE(bool, ip_allow_net0);
421 VNET_DECLARE(bool, ip_allow_net240);
422 /* Address space reserved for loopback */
423 VNET_DECLARE(uint32_t, in_loopback_mask);
424 #define V_ip_allow_net0 VNET(ip_allow_net0)
425 #define V_ip_allow_net240 VNET(ip_allow_net240)
426 #define V_in_loopback_mask VNET(in_loopback_mask)
427 #endif
428
429 /*
430 * Options for use with [gs]etsockopt at the IP level.
431 * First word of comment is data type; bool is stored in int.
432 */
433 #define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */
434 #define IP_HDRINCL 2 /* int; header is included with data */
435 #define IP_TOS 3 /* int; IP type of service and preced. */
436 #define IP_TTL 4 /* int; IP time to live */
437 #define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */
438 #define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */
439 #define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */
440 #define IP_SENDSRCADDR IP_RECVDSTADDR /* cmsg_type to set src addr */
441 #define IP_RETOPTS 8 /* ip_opts; set/get IP options */
442 #define IP_MULTICAST_IF 9 /* struct in_addr *or* struct ip_mreqn;
443 * set/get IP multicast i/f */
444 #define IP_MULTICAST_TTL 10 /* u_char,u_int; set/get IP multicast ttl */
445 #define IP_MULTICAST_LOOP 11 /* u_char,u_int; set/get IP multicast loopback */
446 #define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */
447 #define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */
448 #define IP_MULTICAST_VIF 14 /* int; set/get IP mcast virt. iface */
449 #define IP_RSVP_ON 15 /* int; enable RSVP in kernel */
450 #define IP_RSVP_OFF 16 /* int; disable RSVP in kernel */
451 #define IP_RSVP_VIF_ON 17 /* int; set RSVP per-vif socket */
452 #define IP_RSVP_VIF_OFF 18 /* int; unset RSVP per-vif socket */
453 #define IP_PORTRANGE 19 /* int; range to choose for unspec port */
454 #define IP_RECVIF 20 /* bool; receive reception if w/dgram */
455 /* for IPSEC */
456 #define IP_IPSEC_POLICY 21 /* int; set/get security policy */
457 /* unused; was IP_FAITH */
458 #define IP_ONESBCAST 23 /* bool; send all-ones broadcast */
459 #define IP_BINDANY 24 /* bool; allow bind to any address */
460 /* unused; was IP_BIND_MULTI */
461 /* unused; was IP_RSS_LISTEN_BUCKET */
462 #define IP_ORIGDSTADDR 27 /* bool; receive IP dst addr/port w/dgram */
463 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
464
465 /*
466 * Options for controlling the firewall and dummynet.
467 * Historical options (from 40 to 64) will eventually be
468 * replaced by only two options, IP_FW3 and IP_DUMMYNET3.
469 */
470 #define IP_FW_TABLE_ADD 40 /* add entry */
471 #define IP_FW_TABLE_DEL 41 /* delete entry */
472 #define IP_FW_TABLE_FLUSH 42 /* flush table */
473 #define IP_FW_TABLE_GETSIZE 43 /* get table size */
474 #define IP_FW_TABLE_LIST 44 /* list table contents */
475
476 #define IP_FW3 48 /* generic ipfw v.3 sockopts */
477 #define IP_DUMMYNET3 49 /* generic dummynet v.3 sockopts */
478
479 #define IP_FW_ADD 50 /* add a firewall rule to chain */
480 #define IP_FW_DEL 51 /* delete a firewall rule from chain */
481 #define IP_FW_FLUSH 52 /* flush firewall rule chain */
482 #define IP_FW_ZERO 53 /* clear single/all firewall counter(s) */
483 #define IP_FW_GET 54 /* get entire firewall rule chain */
484 #define IP_FW_RESETLOG 55 /* reset logging counters */
485
486 #define IP_FW_NAT_CFG 56 /* add/config a nat rule */
487 #define IP_FW_NAT_DEL 57 /* delete a nat rule */
488 #define IP_FW_NAT_GET_CONFIG 58 /* get configuration of a nat rule */
489 #define IP_FW_NAT_GET_LOG 59 /* get log of a nat rule */
490
491 #define IP_DUMMYNET_CONFIGURE 60 /* add/configure a dummynet pipe */
492 #define IP_DUMMYNET_DEL 61 /* delete a dummynet pipe from chain */
493 #define IP_DUMMYNET_FLUSH 62 /* flush dummynet */
494 #define IP_DUMMYNET_GET 64 /* get entire dummynet pipes */
495
496 #define IP_RECVTTL 65 /* bool; receive IP TTL w/dgram */
497 #define IP_MINTTL 66 /* int; minimum TTL for packet or drop */
498 #define IP_DONTFRAG 67 /* int; don't fragment packet */
499 #define IP_RECVTOS 68 /* bool; receive IP TOS w/dgram */
500
501 /* IPv4 Source Filter Multicast API [RFC3678] */
502 #define IP_ADD_SOURCE_MEMBERSHIP 70 /* ip_mreq_source; join a source-specific group */
503 #define IP_DROP_SOURCE_MEMBERSHIP 71 /* ip_mreq_source; drop a single source */
504 #define IP_BLOCK_SOURCE 72 /* ip_mreq_source; block a source */
505 #define IP_UNBLOCK_SOURCE 73 /* ip_mreq_source; unblock a source */
506
507 /* The following option is private; do not use it from user applications. */
508 #define IP_MSFILTER 74 /* __msfilterreq; set/get filter list */
509
510 /* The following option deals with the 802.1Q Ethernet Priority Code Point */
511 #define IP_VLAN_PCP 75 /* int; set/get PCP used for packet, */
512 /* -1 use interface default */
513
514 /* Protocol Independent Multicast API [RFC3678] */
515 #define MCAST_JOIN_GROUP 80 /* join an any-source group */
516 #define MCAST_LEAVE_GROUP 81 /* leave all sources for group */
517 #define MCAST_JOIN_SOURCE_GROUP 82 /* join a source-specific group */
518 #define MCAST_LEAVE_SOURCE_GROUP 83 /* leave a single source */
519 #define MCAST_BLOCK_SOURCE 84 /* block a source */
520 #define MCAST_UNBLOCK_SOURCE 85 /* unblock a source */
521
522 /* Flow and RSS definitions */
523 #define IP_FLOWID 90 /* int; get flow id for the given socket/inp */
524 #define IP_FLOWTYPE 91 /* int; get flow type (M_HASHTYPE) */
525 #define IP_RSSBUCKETID 92 /* int; get RSS flowid -> bucket mapping */
526 #define IP_RECVFLOWID 93 /* bool; receive IP flowid/flowtype w/ datagram */
527 #define IP_RECVRSSBUCKETID 94 /* bool; receive IP RSS bucket id w/ datagram */
528
529 /*
530 * Defaults and limits for options
531 */
532 #define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */
533 #define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */
534
535 /*
536 * Limit for IPv4 multicast memberships
537 */
538 #define IP_MAX_MEMBERSHIPS 4095
539
540 /*
541 * Default resource limits for IPv4 multicast source filtering.
542 * These may be modified by sysctl.
543 */
544 #define IP_MAX_GROUP_SRC_FILTER 512 /* sources per group */
545 #define IP_MAX_SOCK_SRC_FILTER 128 /* sources per socket/group */
546 #define IP_MAX_SOCK_MUTE_FILTER 128 /* XXX no longer used */
547
548 /*
549 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
550 */
551 struct ip_mreq {
552 struct in_addr imr_multiaddr; /* IP multicast address of group */
553 struct in_addr imr_interface; /* local IP address of interface */
554 };
555
556 /*
557 * Modified argument structure for IP_MULTICAST_IF, obtained from Linux.
558 * This is used to specify an interface index for multicast sends, as
559 * the IPv4 legacy APIs do not support this (unless IP_SENDIF is available).
560 */
561 struct ip_mreqn {
562 struct in_addr imr_multiaddr; /* IP multicast address of group */
563 struct in_addr imr_address; /* local IP address of interface */
564 int imr_ifindex; /* Interface index; cast to uint32_t */
565 };
566
567 /*
568 * Argument structure for IPv4 Multicast Source Filter APIs. [RFC3678]
569 */
570 struct ip_mreq_source {
571 struct in_addr imr_multiaddr; /* IP multicast address of group */
572 struct in_addr imr_sourceaddr; /* IP address of source */
573 struct in_addr imr_interface; /* local IP address of interface */
574 };
575
576 /*
577 * Argument structures for Protocol-Independent Multicast Source
578 * Filter APIs. [RFC3678]
579 */
580 struct group_req {
581 uint32_t gr_interface; /* interface index */
582 struct sockaddr_storage gr_group; /* group address */
583 };
584
585 struct group_source_req {
586 uint32_t gsr_interface; /* interface index */
587 struct sockaddr_storage gsr_group; /* group address */
588 struct sockaddr_storage gsr_source; /* source address */
589 };
590
591 #ifndef __MSFILTERREQ_DEFINED
592 #define __MSFILTERREQ_DEFINED
593 /*
594 * The following structure is private; do not use it from user applications.
595 * It is used to communicate IP_MSFILTER/IPV6_MSFILTER information between
596 * the RFC 3678 libc functions and the kernel.
597 */
598 struct __msfilterreq {
599 uint32_t msfr_ifindex; /* interface index */
600 uint32_t msfr_fmode; /* filter mode for group */
601 uint32_t msfr_nsrcs; /* # of sources in msfr_srcs */
602 struct sockaddr_storage msfr_group; /* group address */
603 struct sockaddr_storage *msfr_srcs; /* pointer to the first member
604 * of a contiguous array of
605 * sources to filter in full.
606 */
607 };
608 #endif
609
610 struct sockaddr;
611
612 /*
613 * Advanced (Full-state) APIs [RFC3678]
614 * The RFC specifies uint_t for the 6th argument to [sg]etsourcefilter().
615 * We use uint32_t here to be consistent.
616 */
617 int setipv4sourcefilter(int, struct in_addr, struct in_addr, uint32_t,
618 uint32_t, struct in_addr *);
619 int getipv4sourcefilter(int, struct in_addr, struct in_addr, uint32_t *,
620 uint32_t *, struct in_addr *);
621 int setsourcefilter(int, uint32_t, struct sockaddr *, socklen_t,
622 uint32_t, uint32_t, struct sockaddr_storage *);
623 int getsourcefilter(int, uint32_t, struct sockaddr *, socklen_t,
624 uint32_t *, uint32_t *, struct sockaddr_storage *);
625
626 /*
627 * Filter modes; also used to represent per-socket filter mode internally.
628 */
629 #define MCAST_UNDEFINED 0 /* fmode: not yet defined */
630 #define MCAST_INCLUDE 1 /* fmode: include these source(s) */
631 #define MCAST_EXCLUDE 2 /* fmode: exclude these source(s) */
632
633 /*
634 * Argument for IP_PORTRANGE:
635 * - which range to search when port is unspecified at bind() or connect()
636 */
637 #define IP_PORTRANGE_DEFAULT 0 /* default range */
638 #define IP_PORTRANGE_HIGH 1 /* "high" - request firewall bypass */
639 #define IP_PORTRANGE_LOW 2 /* "low" - vouchsafe security */
640
641 /*
642 * Identifiers for IP sysctl nodes
643 */
644 #define IPCTL_FORWARDING 1 /* act as router */
645 #define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */
646 #define IPCTL_DEFTTL 3 /* default TTL */
647 #ifdef notyet
648 #define IPCTL_DEFMTU 4 /* default MTU */
649 #endif
650 /* IPCTL_RTEXPIRE 5 deprecated */
651 /* IPCTL_RTMINEXPIRE 6 deprecated */
652 /* IPCTL_RTMAXCACHE 7 deprecated */
653 #define IPCTL_SOURCEROUTE 8 /* may perform source routes */
654 #define IPCTL_DIRECTEDBROADCAST 9 /* may re-broadcast received packets */
655 #define IPCTL_INTRQMAXLEN 10 /* max length of netisr queue */
656 #define IPCTL_INTRQDROPS 11 /* number of netisr q drops */
657 #define IPCTL_STATS 12 /* ipstat structure */
658 #define IPCTL_ACCEPTSOURCEROUTE 13 /* may accept source routed packets */
659 #define IPCTL_FASTFORWARDING 14 /* use fast IP forwarding code */
660 /* 15, unused, was: IPCTL_KEEPFAITH */
661 #define IPCTL_GIF_TTL 16 /* default TTL for gif encap packet */
662 #define IPCTL_INTRDQMAXLEN 17 /* max length of direct netisr queue */
663 #define IPCTL_INTRDQDROPS 18 /* number of direct netisr q drops */
664
665 #endif /* __BSD_VISIBLE */
666
667 #ifdef _KERNEL
668
669 struct ifnet; struct mbuf; /* forward declarations for Standard C */
670 struct in_ifaddr;
671
672 bool in_ifnet_broadcast(struct in_addr, struct ifnet *);
673 bool in_ifaddr_broadcast(struct in_addr, struct in_ifaddr *);
674 bool in_canforward(struct in_addr);
675 bool in_localaddr(struct in_addr);
676 bool in_localip(struct in_addr);
677 bool in_localip_fib(struct in_addr, uint16_t);
678 bool in_ifhasaddr(struct ifnet *, struct in_addr);
679 struct in_ifaddr *in_findlocal(uint32_t, bool);
680 struct in_ifaddr *in_ifprimaryaddr(struct ifnet *);
681 int inet_aton(const char *, struct in_addr *); /* in libkern */
682 char *inet_ntoa_r(struct in_addr ina, char *buf); /* in libkern */
683 char *inet_ntop(int, const void *, char *, socklen_t); /* in libkern */
684 int inet_pton(int af, const char *, void *); /* in libkern */
685
686 static inline bool
in_broadcast(struct in_addr in)687 in_broadcast(struct in_addr in)
688 {
689 return (in.s_addr == __htonl(INADDR_BROADCAST) ||
690 in.s_addr == __htonl(INADDR_ANY));
691 }
692
693 #define in_hosteq(s, t) ((s).s_addr == (t).s_addr)
694 #define in_nullhost(x) ((x).s_addr == INADDR_ANY)
695 #define in_allhosts(x) ((x).s_addr == htonl(INADDR_ALLHOSTS_GROUP))
696
697 #define satosin(sa) ((struct sockaddr_in *)(sa))
698 #define sintosa(sin) ((struct sockaddr *)(sin))
699 #define ifatoia(ifa) ((struct in_ifaddr *)(ifa))
700 #endif /* _KERNEL */
701
702 /* INET6 stuff */
703 #if __POSIX_VISIBLE >= 200112
704 #define __KAME_NETINET_IN_H_INCLUDED_
705 #include <netinet6/in6.h>
706 #undef __KAME_NETINET_IN_H_INCLUDED_
707 #endif
708
709 #endif /* !_NETINET_IN_H_*/
710