linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Definitions of the Internet Protocol.
8 *
9 * Version: @(#)in.h 1.0.1 04/21/93
10 *
11 * Authors: Original taken from the GNU Project <netinet/in.h> file.
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version
17 * 2 of the License, or (at your option) any later version.
18 */
19 #ifndef _LINUX_IN_H
20 #define _LINUX_IN_H
21
22 #include <linux/types.h>
23 #include <linux/stddef.h>
24 #include <linux/libc-compat.h>
25 #include <linux/socket.h>
26
27 #if __UAPI_DEF_IN_IPPROTO
28 /* Standard well-defined IP protocols. */
29 enum {
30 IPPROTO_IP = 0, /* Dummy protocol for TCP */
31 #define IPPROTO_IP IPPROTO_IP
32 IPPROTO_ICMP = 1, /* Internet Control Message Protocol */
33 #define IPPROTO_ICMP IPPROTO_ICMP
34 IPPROTO_IGMP = 2, /* Internet Group Management Protocol */
35 #define IPPROTO_IGMP IPPROTO_IGMP
36 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */
37 #define IPPROTO_IPIP IPPROTO_IPIP
38 IPPROTO_TCP = 6, /* Transmission Control Protocol */
39 #define IPPROTO_TCP IPPROTO_TCP
40 IPPROTO_EGP = 8, /* Exterior Gateway Protocol */
41 #define IPPROTO_EGP IPPROTO_EGP
42 IPPROTO_PUP = 12, /* PUP protocol */
43 #define IPPROTO_PUP IPPROTO_PUP
44 IPPROTO_UDP = 17, /* User Datagram Protocol */
45 #define IPPROTO_UDP IPPROTO_UDP
46 IPPROTO_IDP = 22, /* XNS IDP protocol */
47 #define IPPROTO_IDP IPPROTO_IDP
48 IPPROTO_TP = 29, /* SO Transport Protocol Class 4 */
49 #define IPPROTO_TP IPPROTO_TP
50 IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */
51 #define IPPROTO_DCCP IPPROTO_DCCP
52 IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */
53 #define IPPROTO_IPV6 IPPROTO_IPV6
54 IPPROTO_RSVP = 46, /* RSVP Protocol */
55 #define IPPROTO_RSVP IPPROTO_RSVP
56 IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */
57 #define IPPROTO_GRE IPPROTO_GRE
58 IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */
59 #define IPPROTO_ESP IPPROTO_ESP
60 IPPROTO_AH = 51, /* Authentication Header protocol */
61 #define IPPROTO_AH IPPROTO_AH
62 IPPROTO_MTP = 92, /* Multicast Transport Protocol */
63 #define IPPROTO_MTP IPPROTO_MTP
64 IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */
65 #define IPPROTO_BEETPH IPPROTO_BEETPH
66 IPPROTO_ENCAP = 98, /* Encapsulation Header */
67 #define IPPROTO_ENCAP IPPROTO_ENCAP
68 IPPROTO_PIM = 103, /* Protocol Independent Multicast */
69 #define IPPROTO_PIM IPPROTO_PIM
70 IPPROTO_COMP = 108, /* Compression Header Protocol */
71 #define IPPROTO_COMP IPPROTO_COMP
72 IPPROTO_L2TP = 115, /* Layer 2 Tunnelling Protocol */
73 #define IPPROTO_L2TP IPPROTO_L2TP
74 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
75 #define IPPROTO_SCTP IPPROTO_SCTP
76 IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */
77 #define IPPROTO_UDPLITE IPPROTO_UDPLITE
78 IPPROTO_MPLS = 137, /* MPLS in IP (RFC 4023) */
79 #define IPPROTO_MPLS IPPROTO_MPLS
80 IPPROTO_ETHERNET = 143, /* Ethernet-within-IPv6 Encapsulation */
81 #define IPPROTO_ETHERNET IPPROTO_ETHERNET
82 IPPROTO_RAW = 255, /* Raw IP packets */
83 #define IPPROTO_RAW IPPROTO_RAW
84 IPPROTO_MPTCP = 262, /* Multipath TCP connection */
85 #define IPPROTO_MPTCP IPPROTO_MPTCP
86 IPPROTO_MAX
87 };
88 #endif
89
90 #if __UAPI_DEF_IN_ADDR
91 /* Internet address. */
92 struct in_addr {
93 __be32 s_addr;
94 };
95 #endif
96
97 #define IP_TOS 1
98 #define IP_TTL 2
99 #define IP_HDRINCL 3
100 #define IP_OPTIONS 4
101 #define IP_ROUTER_ALERT 5
102 #define IP_RECVOPTS 6
103 #define IP_RETOPTS 7
104 #define IP_PKTINFO 8
105 #define IP_PKTOPTIONS 9
106 #define IP_MTU_DISCOVER 10
107 #define IP_RECVERR 11
108 #define IP_RECVTTL 12
109 #define IP_RECVTOS 13
110 #define IP_MTU 14
111 #define IP_FREEBIND 15
112 #define IP_IPSEC_POLICY 16
113 #define IP_XFRM_POLICY 17
114 #define IP_PASSSEC 18
115 #define IP_TRANSPARENT 19
116
117 /* BSD compatibility */
118 #define IP_RECVRETOPTS IP_RETOPTS
119
120 /* TProxy original addresses */
121 #define IP_ORIGDSTADDR 20
122 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
123
124 #define IP_MINTTL 21
125 #define IP_NODEFRAG 22
126 #define IP_CHECKSUM 23
127 #define IP_BIND_ADDRESS_NO_PORT 24
128 #define IP_RECVFRAGSIZE 25
129 #define IP_RECVERR_RFC4884 26
130
131 /* IP_MTU_DISCOVER values */
132 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */
133 #define IP_PMTUDISC_WANT 1 /* Use per route hints */
134 #define IP_PMTUDISC_DO 2 /* Always DF */
135 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
136 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
137 * Also incoming ICMP frag_needed notifications will be ignored on
138 * this socket to prevent accepting spoofed ones.
139 */
140 #define IP_PMTUDISC_INTERFACE 4
141 /* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get
142 * fragmented if they exeed the interface mtu
143 */
144 #define IP_PMTUDISC_OMIT 5
145
146 #define IP_MULTICAST_IF 32
147 #define IP_MULTICAST_TTL 33
148 #define IP_MULTICAST_LOOP 34
149 #define IP_ADD_MEMBERSHIP 35
150 #define IP_DROP_MEMBERSHIP 36
151 #define IP_UNBLOCK_SOURCE 37
152 #define IP_BLOCK_SOURCE 38
153 #define IP_ADD_SOURCE_MEMBERSHIP 39
154 #define IP_DROP_SOURCE_MEMBERSHIP 40
155 #define IP_MSFILTER 41
156 #define MCAST_JOIN_GROUP 42
157 #define MCAST_BLOCK_SOURCE 43
158 #define MCAST_UNBLOCK_SOURCE 44
159 #define MCAST_LEAVE_GROUP 45
160 #define MCAST_JOIN_SOURCE_GROUP 46
161 #define MCAST_LEAVE_SOURCE_GROUP 47
162 #define MCAST_MSFILTER 48
163 #define IP_MULTICAST_ALL 49
164 #define IP_UNICAST_IF 50
165 #define IP_LOCAL_PORT_RANGE 51
166 #define IP_PROTOCOL 52
167
168 #define MCAST_EXCLUDE 0
169 #define MCAST_INCLUDE 1
170
171 /* These need to appear somewhere around here */
172 #define IP_DEFAULT_MULTICAST_TTL 1
173 #define IP_DEFAULT_MULTICAST_LOOP 1
174
175 /* Request struct for multicast socket ops */
176
177 #if __UAPI_DEF_IP_MREQ
178 struct ip_mreq {
179 struct in_addr imr_multiaddr; /* IP multicast address of group */
180 struct in_addr imr_interface; /* local IP address of interface */
181 };
182
183 struct ip_mreqn {
184 struct in_addr imr_multiaddr; /* IP multicast address of group */
185 struct in_addr imr_address; /* local IP address of interface */
186 int imr_ifindex; /* Interface index */
187 };
188
189 struct ip_mreq_source {
190 __be32 imr_multiaddr;
191 __be32 imr_interface;
192 __be32 imr_sourceaddr;
193 };
194
195 struct ip_msfilter {
196 __be32 imsf_multiaddr;
197 __be32 imsf_interface;
198 __u32 imsf_fmode;
199 __u32 imsf_numsrc;
200 union {
201 __be32 imsf_slist[1];
202 __DECLARE_FLEX_ARRAY(__be32, imsf_slist_flex);
203 };
204 };
205
206 #define IP_MSFILTER_SIZE(numsrc) \
207 (sizeof(struct ip_msfilter) - sizeof(__u32) \
208 + (numsrc) * sizeof(__u32))
209
210 struct group_req {
211 __u32 gr_interface; /* interface index */
212 struct __kernel_sockaddr_storage gr_group; /* group address */
213 };
214
215 struct group_source_req {
216 __u32 gsr_interface; /* interface index */
217 struct __kernel_sockaddr_storage gsr_group; /* group address */
218 struct __kernel_sockaddr_storage gsr_source; /* source address */
219 };
220
221 struct group_filter {
222 union {
223 struct {
224 __u32 gf_interface_aux; /* interface index */
225 struct __kernel_sockaddr_storage gf_group_aux; /* multicast address */
226 __u32 gf_fmode_aux; /* filter mode */
227 __u32 gf_numsrc_aux; /* number of sources */
228 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
229 };
230 struct {
231 __u32 gf_interface; /* interface index */
232 struct __kernel_sockaddr_storage gf_group; /* multicast address */
233 __u32 gf_fmode; /* filter mode */
234 __u32 gf_numsrc; /* number of sources */
235 struct __kernel_sockaddr_storage gf_slist_flex[]; /* interface index */
236 };
237 };
238 };
239
240 #define GROUP_FILTER_SIZE(numsrc) \
241 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
242 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
243 #endif
244
245 #if __UAPI_DEF_IN_PKTINFO
246 struct in_pktinfo {
247 int ipi_ifindex;
248 struct in_addr ipi_spec_dst;
249 struct in_addr ipi_addr;
250 };
251 #endif
252
253 /* Structure describing an Internet (IP) socket address. */
254 #if __UAPI_DEF_SOCKADDR_IN
255 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
256 struct sockaddr_in {
257 __kernel_sa_family_t sin_family; /* Address family */
258 __be16 sin_port; /* Port number */
259 struct in_addr sin_addr; /* Internet address */
260
261 /* Pad to size of `struct sockaddr'. */
262 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
263 sizeof(unsigned short int) - sizeof(struct in_addr)];
264 };
265 #define sin_zero __pad /* for BSD UNIX comp. -FvK */
266 #endif
267
268 #if __UAPI_DEF_IN_CLASS
269 /*
270 * Definitions of the bits in an Internet address integer.
271 * On subnets, host and network parts are found according
272 * to the subnet mask, not these masks.
273 */
274 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
275 #define IN_CLASSA_NET 0xff000000
276 #define IN_CLASSA_NSHIFT 24
277 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
278 #define IN_CLASSA_MAX 128
279
280 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
281 #define IN_CLASSB_NET 0xffff0000
282 #define IN_CLASSB_NSHIFT 16
283 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
284 #define IN_CLASSB_MAX 65536
285
286 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
287 #define IN_CLASSC_NET 0xffffff00
288 #define IN_CLASSC_NSHIFT 8
289 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
290
291 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
292 #define IN_MULTICAST(a) IN_CLASSD(a)
293 #define IN_MULTICAST_NET 0xe0000000
294
295 #define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff)
296 #define IN_EXPERIMENTAL(a) IN_BADCLASS((a))
297
298 #define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
299 #define IN_CLASSE_NET 0xffffffff
300 #define IN_CLASSE_NSHIFT 0
301
302 /* Address to accept any incoming messages. */
303 #define INADDR_ANY ((unsigned long int) 0x00000000)
304
305 /* Address to send to all hosts. */
306 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
307
308 /* Address indicating an error return. */
309 #define INADDR_NONE ((unsigned long int) 0xffffffff)
310
311 /* Dummy address for src of ICMP replies if no real address is set (RFC7600). */
312 #define INADDR_DUMMY ((unsigned long int) 0xc0000008)
313
314 /* Network number for local host loopback. */
315 #define IN_LOOPBACKNET 127
316
317 /* Address to loopback in software to local host. */
318 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
319 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
320
321 /* Defines for Multicast INADDR */
322 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
323 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
324 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
325 #define INADDR_ALLSNOOPERS_GROUP 0xe000006aU /* 224.0.0.106 */
326 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
327 #endif
328
329 /* <asm/byteorder.h> contains the htonl type stuff.. */
330 #include <asm/byteorder.h>
331
332
333 #endif /* _LINUX_IN_H */
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