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/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_SMC = 256, /* Shared Memory Communications */
85 #define IPPROTO_SMC IPPROTO_SMC
86 IPPROTO_MPTCP = 262, /* Multipath TCP connection */
87 #define IPPROTO_MPTCP IPPROTO_MPTCP
88 IPPROTO_MAX
89 };
90 #endif
91
92 #if __UAPI_DEF_IN_ADDR
93 /* Internet address. */
94 struct in_addr {
95 __be32 s_addr;
96 };
97 #endif
98
99 #define IP_TOS 1
100 #define IP_TTL 2
101 #define IP_HDRINCL 3
102 #define IP_OPTIONS 4
103 #define IP_ROUTER_ALERT 5
104 #define IP_RECVOPTS 6
105 #define IP_RETOPTS 7
106 #define IP_PKTINFO 8
107 #define IP_PKTOPTIONS 9
108 #define IP_MTU_DISCOVER 10
109 #define IP_RECVERR 11
110 #define IP_RECVTTL 12
111 #define IP_RECVTOS 13
112 #define IP_MTU 14
113 #define IP_FREEBIND 15
114 #define IP_IPSEC_POLICY 16
115 #define IP_XFRM_POLICY 17
116 #define IP_PASSSEC 18
117 #define IP_TRANSPARENT 19
118
119 /* BSD compatibility */
120 #define IP_RECVRETOPTS IP_RETOPTS
121
122 /* TProxy original addresses */
123 #define IP_ORIGDSTADDR 20
124 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
125
126 #define IP_MINTTL 21
127 #define IP_NODEFRAG 22
128 #define IP_CHECKSUM 23
129 #define IP_BIND_ADDRESS_NO_PORT 24
130 #define IP_RECVFRAGSIZE 25
131 #define IP_RECVERR_RFC4884 26
132
133 /* IP_MTU_DISCOVER values */
134 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */
135 #define IP_PMTUDISC_WANT 1 /* Use per route hints */
136 #define IP_PMTUDISC_DO 2 /* Always DF */
137 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
138 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
139 * Also incoming ICMP frag_needed notifications will be ignored on
140 * this socket to prevent accepting spoofed ones.
141 */
142 #define IP_PMTUDISC_INTERFACE 4
143 /* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get
144 * fragmented if they exeed the interface mtu
145 */
146 #define IP_PMTUDISC_OMIT 5
147
148 #define IP_MULTICAST_IF 32
149 #define IP_MULTICAST_TTL 33
150 #define IP_MULTICAST_LOOP 34
151 #define IP_ADD_MEMBERSHIP 35
152 #define IP_DROP_MEMBERSHIP 36
153 #define IP_UNBLOCK_SOURCE 37
154 #define IP_BLOCK_SOURCE 38
155 #define IP_ADD_SOURCE_MEMBERSHIP 39
156 #define IP_DROP_SOURCE_MEMBERSHIP 40
157 #define IP_MSFILTER 41
158 #define MCAST_JOIN_GROUP 42
159 #define MCAST_BLOCK_SOURCE 43
160 #define MCAST_UNBLOCK_SOURCE 44
161 #define MCAST_LEAVE_GROUP 45
162 #define MCAST_JOIN_SOURCE_GROUP 46
163 #define MCAST_LEAVE_SOURCE_GROUP 47
164 #define MCAST_MSFILTER 48
165 #define IP_MULTICAST_ALL 49
166 #define IP_UNICAST_IF 50
167 #define IP_LOCAL_PORT_RANGE 51
168 #define IP_PROTOCOL 52
169
170 #define MCAST_EXCLUDE 0
171 #define MCAST_INCLUDE 1
172
173 /* These need to appear somewhere around here */
174 #define IP_DEFAULT_MULTICAST_TTL 1
175 #define IP_DEFAULT_MULTICAST_LOOP 1
176
177 /* Request struct for multicast socket ops */
178
179 #if __UAPI_DEF_IP_MREQ
180 struct ip_mreq {
181 struct in_addr imr_multiaddr; /* IP multicast address of group */
182 struct in_addr imr_interface; /* local IP address of interface */
183 };
184
185 struct ip_mreqn {
186 struct in_addr imr_multiaddr; /* IP multicast address of group */
187 struct in_addr imr_address; /* local IP address of interface */
188 int imr_ifindex; /* Interface index */
189 };
190
191 struct ip_mreq_source {
192 __be32 imr_multiaddr;
193 __be32 imr_interface;
194 __be32 imr_sourceaddr;
195 };
196
197 struct ip_msfilter {
198 __be32 imsf_multiaddr;
199 __be32 imsf_interface;
200 __u32 imsf_fmode;
201 __u32 imsf_numsrc;
202 union {
203 __be32 imsf_slist[1];
204 __DECLARE_FLEX_ARRAY(__be32, imsf_slist_flex);
205 };
206 };
207
208 #define IP_MSFILTER_SIZE(numsrc) \
209 (sizeof(struct ip_msfilter) - sizeof(__u32) \
210 + (numsrc) * sizeof(__u32))
211
212 struct group_req {
213 __u32 gr_interface; /* interface index */
214 struct __kernel_sockaddr_storage gr_group; /* group address */
215 };
216
217 struct group_source_req {
218 __u32 gsr_interface; /* interface index */
219 struct __kernel_sockaddr_storage gsr_group; /* group address */
220 struct __kernel_sockaddr_storage gsr_source; /* source address */
221 };
222
223 struct group_filter {
224 union {
225 struct {
226 __u32 gf_interface_aux; /* interface index */
227 struct __kernel_sockaddr_storage gf_group_aux; /* multicast address */
228 __u32 gf_fmode_aux; /* filter mode */
229 __u32 gf_numsrc_aux; /* number of sources */
230 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
231 };
232 struct {
233 __u32 gf_interface; /* interface index */
234 struct __kernel_sockaddr_storage gf_group; /* multicast address */
235 __u32 gf_fmode; /* filter mode */
236 __u32 gf_numsrc; /* number of sources */
237 struct __kernel_sockaddr_storage gf_slist_flex[]; /* interface index */
238 };
239 };
240 };
241
242 #define GROUP_FILTER_SIZE(numsrc) \
243 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
244 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
245 #endif
246
247 #if __UAPI_DEF_IN_PKTINFO
248 struct in_pktinfo {
249 int ipi_ifindex;
250 struct in_addr ipi_spec_dst;
251 struct in_addr ipi_addr;
252 };
253 #endif
254
255 /* Structure describing an Internet (IP) socket address. */
256 #if __UAPI_DEF_SOCKADDR_IN
257 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
258 struct sockaddr_in {
259 __kernel_sa_family_t sin_family; /* Address family */
260 __be16 sin_port; /* Port number */
261 struct in_addr sin_addr; /* Internet address */
262
263 /* Pad to size of `struct sockaddr'. */
264 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
265 sizeof(unsigned short int) - sizeof(struct in_addr)];
266 };
267 #define sin_zero __pad /* for BSD UNIX comp. -FvK */
268 #endif
269
270 #if __UAPI_DEF_IN_CLASS
271 /*
272 * Definitions of the bits in an Internet address integer.
273 * On subnets, host and network parts are found according
274 * to the subnet mask, not these masks.
275 */
276 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
277 #define IN_CLASSA_NET 0xff000000
278 #define IN_CLASSA_NSHIFT 24
279 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
280 #define IN_CLASSA_MAX 128
281
282 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
283 #define IN_CLASSB_NET 0xffff0000
284 #define IN_CLASSB_NSHIFT 16
285 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
286 #define IN_CLASSB_MAX 65536
287
288 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
289 #define IN_CLASSC_NET 0xffffff00
290 #define IN_CLASSC_NSHIFT 8
291 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
292
293 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
294 #define IN_MULTICAST(a) IN_CLASSD(a)
295 #define IN_MULTICAST_NET 0xe0000000
296
297 #define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff)
298 #define IN_EXPERIMENTAL(a) IN_BADCLASS((a))
299
300 #define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
301 #define IN_CLASSE_NET 0xffffffff
302 #define IN_CLASSE_NSHIFT 0
303
304 /* Address to accept any incoming messages. */
305 #define INADDR_ANY ((unsigned long int) 0x00000000)
306
307 /* Address to send to all hosts. */
308 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
309
310 /* Address indicating an error return. */
311 #define INADDR_NONE ((unsigned long int) 0xffffffff)
312
313 /* Dummy address for src of ICMP replies if no real address is set (RFC7600). */
314 #define INADDR_DUMMY ((unsigned long int) 0xc0000008)
315
316 /* Network number for local host loopback. */
317 #define IN_LOOPBACKNET 127
318
319 /* Address to loopback in software to local host. */
320 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
321 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
322
323 /* Defines for Multicast INADDR */
324 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
325 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
326 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
327 #define INADDR_ALLSNOOPERS_GROUP 0xe000006aU /* 224.0.0.106 */
328 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
329 #endif
330
331 /* <asm/byteorder.h> contains the htonl type stuff.. */
332 #include <asm/byteorder.h>
333
334
335 #endif /* _UAPI_LINUX_IN_H */
336
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