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