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_RAW = 255, /* Raw IP packets */
78 #define IPPROTO_RAW IPPROTO_RAW
79 IPPROTO_MAX
80 };
81 #endif
82
83 #if __UAPI_DEF_IN_ADDR
84 /* Internet address. */
85 struct in_addr {
86 __be32 s_addr;
87 };
88 #endif
89
90 #define IP_TOS 1
91 #define IP_TTL 2
92 #define IP_HDRINCL 3
93 #define IP_OPTIONS 4
94 #define IP_ROUTER_ALERT 5
95 #define IP_RECVOPTS 6
96 #define IP_RETOPTS 7
97 #define IP_PKTINFO 8
98 #define IP_PKTOPTIONS 9
99 #define IP_MTU_DISCOVER 10
100 #define IP_RECVERR 11
101 #define IP_RECVTTL 12
102 #define IP_RECVTOS 13
103 #define IP_MTU 14
104 #define IP_FREEBIND 15
105 #define IP_IPSEC_POLICY 16
106 #define IP_XFRM_POLICY 17
107 #define IP_PASSSEC 18
108 #define IP_TRANSPARENT 19
109
110 /* BSD compatibility */
111 #define IP_RECVRETOPTS IP_RETOPTS
112
113 /* TProxy original addresses */
114 #define IP_ORIGDSTADDR 20
115 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
116
117 #define IP_MINTTL 21
118 #define IP_NODEFRAG 22
119 #define IP_CHECKSUM 23
120 #define IP_BIND_ADDRESS_NO_PORT 24
121 #define IP_RECVFRAGSIZE 25
122
123 /* IP_MTU_DISCOVER values */
124 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */
125 #define IP_PMTUDISC_WANT 1 /* Use per route hints */
126 #define IP_PMTUDISC_DO 2 /* Always DF */
127 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
128 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
129 * Also incoming ICMP frag_needed notifications will be ignored on
130 * this socket to prevent accepting spoofed ones.
131 */
132 #define IP_PMTUDISC_INTERFACE 4
133 /* weaker version of IP_PMTUDISC_INTERFACE, which allos packets to get
134 * fragmented if they exeed the interface mtu
135 */
136 #define IP_PMTUDISC_OMIT 5
137
138 #define IP_MULTICAST_IF 32
139 #define IP_MULTICAST_TTL 33
140 #define IP_MULTICAST_LOOP 34
141 #define IP_ADD_MEMBERSHIP 35
142 #define IP_DROP_MEMBERSHIP 36
143 #define IP_UNBLOCK_SOURCE 37
144 #define IP_BLOCK_SOURCE 38
145 #define IP_ADD_SOURCE_MEMBERSHIP 39
146 #define IP_DROP_SOURCE_MEMBERSHIP 40
147 #define IP_MSFILTER 41
148 #define MCAST_JOIN_GROUP 42
149 #define MCAST_BLOCK_SOURCE 43
150 #define MCAST_UNBLOCK_SOURCE 44
151 #define MCAST_LEAVE_GROUP 45
152 #define MCAST_JOIN_SOURCE_GROUP 46
153 #define MCAST_LEAVE_SOURCE_GROUP 47
154 #define MCAST_MSFILTER 48
155 #define IP_MULTICAST_ALL 49
156 #define IP_UNICAST_IF 50
157
158 #define MCAST_EXCLUDE 0
159 #define MCAST_INCLUDE 1
160
161 /* These need to appear somewhere around here */
162 #define IP_DEFAULT_MULTICAST_TTL 1
163 #define IP_DEFAULT_MULTICAST_LOOP 1
164
165 /* Request struct for multicast socket ops */
166
167 #if __UAPI_DEF_IP_MREQ
168 struct ip_mreq {
169 struct in_addr imr_multiaddr; /* IP multicast address of group */
170 struct in_addr imr_interface; /* local IP address of interface */
171 };
172
173 struct ip_mreqn {
174 struct in_addr imr_multiaddr; /* IP multicast address of group */
175 struct in_addr imr_address; /* local IP address of interface */
176 int imr_ifindex; /* Interface index */
177 };
178
179 struct ip_mreq_source {
180 __be32 imr_multiaddr;
181 __be32 imr_interface;
182 __be32 imr_sourceaddr;
183 };
184
185 struct ip_msfilter {
186 __be32 imsf_multiaddr;
187 __be32 imsf_interface;
188 __u32 imsf_fmode;
189 __u32 imsf_numsrc;
190 __be32 imsf_slist[1];
191 };
192
193 #define IP_MSFILTER_SIZE(numsrc) \
194 (sizeof(struct ip_msfilter) - sizeof(__u32) \
195 + (numsrc) * sizeof(__u32))
196
197 struct group_req {
198 __u32 gr_interface; /* interface index */
199 struct __kernel_sockaddr_storage gr_group; /* group address */
200 };
201
202 struct group_source_req {
203 __u32 gsr_interface; /* interface index */
204 struct __kernel_sockaddr_storage gsr_group; /* group address */
205 struct __kernel_sockaddr_storage gsr_source; /* source address */
206 };
207
208 struct group_filter {
209 __u32 gf_interface; /* interface index */
210 struct __kernel_sockaddr_storage gf_group; /* multicast address */
211 __u32 gf_fmode; /* filter mode */
212 __u32 gf_numsrc; /* number of sources */
213 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
214 };
215
216 #define GROUP_FILTER_SIZE(numsrc) \
217 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
218 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
219 #endif
220
221 #if __UAPI_DEF_IN_PKTINFO
222 struct in_pktinfo {
223 int ipi_ifindex;
224 struct in_addr ipi_spec_dst;
225 struct in_addr ipi_addr;
226 };
227 #endif
228
229 /* Structure describing an Internet (IP) socket address. */
230 #if __UAPI_DEF_SOCKADDR_IN
231 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
232 struct sockaddr_in {
233 __kernel_sa_family_t sin_family; /* Address family */
234 __be16 sin_port; /* Port number */
235 struct in_addr sin_addr; /* Internet address */
236
237 /* Pad to size of `struct sockaddr'. */
238 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
239 sizeof(unsigned short int) - sizeof(struct in_addr)];
240 };
241 #define sin_zero __pad /* for BSD UNIX comp. -FvK */
242 #endif
243
244 #if __UAPI_DEF_IN_CLASS
245 /*
246 * Definitions of the bits in an Internet address integer.
247 * On subnets, host and network parts are found according
248 * to the subnet mask, not these masks.
249 */
250 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
251 #define IN_CLASSA_NET 0xff000000
252 #define IN_CLASSA_NSHIFT 24
253 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
254 #define IN_CLASSA_MAX 128
255
256 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
257 #define IN_CLASSB_NET 0xffff0000
258 #define IN_CLASSB_NSHIFT 16
259 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
260 #define IN_CLASSB_MAX 65536
261
262 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
263 #define IN_CLASSC_NET 0xffffff00
264 #define IN_CLASSC_NSHIFT 8
265 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
266
267 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
268 #define IN_MULTICAST(a) IN_CLASSD(a)
269 #define IN_MULTICAST_NET 0xe0000000
270
271 #define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff)
272 #define IN_EXPERIMENTAL(a) IN_BADCLASS((a))
273
274 #define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
275 #define IN_CLASSE_NET 0xffffffff
276 #define IN_CLASSE_NSHIFT 0
277
278 /* Address to accept any incoming messages. */
279 #define INADDR_ANY ((unsigned long int) 0x00000000)
280
281 /* Address to send to all hosts. */
282 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
283
284 /* Address indicating an error return. */
285 #define INADDR_NONE ((unsigned long int) 0xffffffff)
286
287 /* Network number for local host loopback. */
288 #define IN_LOOPBACKNET 127
289
290 /* Address to loopback in software to local host. */
291 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
292 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
293
294 /* Defines for Multicast INADDR */
295 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
296 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
297 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
298 #define INADDR_ALLSNOOPERS_GROUP 0xe000006aU /* 224.0.0.106 */
299 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
300 #endif
301
302 /* <asm/byteorder.h> contains the htonl type stuff.. */
303 #include <asm/byteorder.h>
304
305
306 #endif /* _UAPI_LINUX_IN_H */
307
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