1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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.
7 * Definitions of the Internet Protocol.
9 * Version: @(#)in.h 1.0.1 04/21/93
11 * Authors: Original taken from the GNU Project <netinet/in.h> file.
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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.
19 #ifndef _UAPI_LINUX_IN_H
20 #define _UAPI_LINUX_IN_H
22 #include <linux/types.h>
23 #include <linux/stddef.h>
24 #include <linux/libc-compat.h>
25 #include <linux/socket.h>
27 #if __UAPI_DEF_IN_IPPROTO
28 /* Standard well-defined IP protocols. */
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_AGGFRAG = 144, /* AGGFRAG in ESP (RFC 9347) */
83 #define IPPROTO_AGGFRAG IPPROTO_AGGFRAG
84 IPPROTO_RAW = 255, /* Raw IP packets */
85 #define IPPROTO_RAW IPPROTO_RAW
86 IPPROTO_SMC = 256, /* Shared Memory Communications */
87 #define IPPROTO_SMC IPPROTO_SMC
88 IPPROTO_MPTCP = 262, /* Multipath TCP connection */
89 #define IPPROTO_MPTCP IPPROTO_MPTCP
94 #if __UAPI_DEF_IN_ADDR
95 /* Internet address. */
105 #define IP_ROUTER_ALERT 5
106 #define IP_RECVOPTS 6
109 #define IP_PKTOPTIONS 9
110 #define IP_MTU_DISCOVER 10
111 #define IP_RECVERR 11
112 #define IP_RECVTTL 12
113 #define IP_RECVTOS 13
115 #define IP_FREEBIND 15
116 #define IP_IPSEC_POLICY 16
117 #define IP_XFRM_POLICY 17
118 #define IP_PASSSEC 18
119 #define IP_TRANSPARENT 19
121 /* BSD compatibility */
122 #define IP_RECVRETOPTS IP_RETOPTS
124 /* TProxy original addresses */
125 #define IP_ORIGDSTADDR 20
126 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
129 #define IP_NODEFRAG 22
130 #define IP_CHECKSUM 23
131 #define IP_BIND_ADDRESS_NO_PORT 24
132 #define IP_RECVFRAGSIZE 25
133 #define IP_RECVERR_RFC4884 26
135 /* IP_MTU_DISCOVER values */
136 #define IP_PMTUDISC_DONT 0 /* Never send DF frames */
137 #define IP_PMTUDISC_WANT 1 /* Use per route hints */
138 #define IP_PMTUDISC_DO 2 /* Always DF */
139 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
140 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
141 * Also incoming ICMP frag_needed notifications will be ignored on
142 * this socket to prevent accepting spoofed ones.
144 #define IP_PMTUDISC_INTERFACE 4
145 /* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get
146 * fragmented if they exceed the interface mtu
148 #define IP_PMTUDISC_OMIT 5
150 #define IP_MULTICAST_IF 32
151 #define IP_MULTICAST_TTL 33
152 #define IP_MULTICAST_LOOP 34
153 #define IP_ADD_MEMBERSHIP 35
154 #define IP_DROP_MEMBERSHIP 36
155 #define IP_UNBLOCK_SOURCE 37
156 #define IP_BLOCK_SOURCE 38
157 #define IP_ADD_SOURCE_MEMBERSHIP 39
158 #define IP_DROP_SOURCE_MEMBERSHIP 40
159 #define IP_MSFILTER 41
160 #define MCAST_JOIN_GROUP 42
161 #define MCAST_BLOCK_SOURCE 43
162 #define MCAST_UNBLOCK_SOURCE 44
163 #define MCAST_LEAVE_GROUP 45
164 #define MCAST_JOIN_SOURCE_GROUP 46
165 #define MCAST_LEAVE_SOURCE_GROUP 47
166 #define MCAST_MSFILTER 48
167 #define IP_MULTICAST_ALL 49
168 #define IP_UNICAST_IF 50
169 #define IP_LOCAL_PORT_RANGE 51
170 #define IP_PROTOCOL 52
172 #define MCAST_EXCLUDE 0
173 #define MCAST_INCLUDE 1
175 /* These need to appear somewhere around here */
176 #define IP_DEFAULT_MULTICAST_TTL 1
177 #define IP_DEFAULT_MULTICAST_LOOP 1
179 /* Request struct for multicast socket ops */
181 #if __UAPI_DEF_IP_MREQ
183 struct in_addr imr_multiaddr; /* IP multicast address of group */
184 struct in_addr imr_interface; /* local IP address of interface */
188 struct in_addr imr_multiaddr; /* IP multicast address of group */
189 struct in_addr imr_address; /* local IP address of interface */
190 int imr_ifindex; /* Interface index */
193 struct ip_mreq_source {
194 __be32 imr_multiaddr;
195 __be32 imr_interface;
196 __be32 imr_sourceaddr;
200 __be32 imsf_multiaddr;
201 __be32 imsf_interface;
205 __be32 imsf_slist[1];
206 __DECLARE_FLEX_ARRAY(__be32, imsf_slist_flex);
210 #define IP_MSFILTER_SIZE(numsrc) \
211 (sizeof(struct ip_msfilter) - sizeof(__u32) \
212 + (numsrc) * sizeof(__u32))
215 __u32 gr_interface; /* interface index */
216 struct __kernel_sockaddr_storage gr_group; /* group address */
219 struct group_source_req {
220 __u32 gsr_interface; /* interface index */
221 struct __kernel_sockaddr_storage gsr_group; /* group address */
222 struct __kernel_sockaddr_storage gsr_source; /* source address */
225 struct group_filter {
228 __u32 gf_interface_aux; /* interface index */
229 struct __kernel_sockaddr_storage gf_group_aux; /* multicast address */
230 __u32 gf_fmode_aux; /* filter mode */
231 __u32 gf_numsrc_aux; /* number of sources */
232 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
235 __u32 gf_interface; /* interface index */
236 struct __kernel_sockaddr_storage gf_group; /* multicast address */
237 __u32 gf_fmode; /* filter mode */
238 __u32 gf_numsrc; /* number of sources */
239 struct __kernel_sockaddr_storage gf_slist_flex[]; /* interface index */
244 #define GROUP_FILTER_SIZE(numsrc) \
245 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
246 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
249 #if __UAPI_DEF_IN_PKTINFO
252 struct in_addr ipi_spec_dst;
253 struct in_addr ipi_addr;
257 /* Structure describing an Internet (IP) socket address. */
258 #if __UAPI_DEF_SOCKADDR_IN
259 #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
261 __kernel_sa_family_t sin_family; /* Address family */
262 __be16 sin_port; /* Port number */
263 struct in_addr sin_addr; /* Internet address */
265 /* Pad to size of `struct sockaddr'. */
266 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
267 sizeof(unsigned short int) - sizeof(struct in_addr)];
269 #define sin_zero __pad /* for BSD UNIX comp. -FvK */
272 #if __UAPI_DEF_IN_CLASS
274 * Definitions of the bits in an Internet address integer.
275 * On subnets, host and network parts are found according
276 * to the subnet mask, not these masks.
278 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
279 #define IN_CLASSA_NET 0xff000000
280 #define IN_CLASSA_NSHIFT 24
281 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
282 #define IN_CLASSA_MAX 128
284 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
285 #define IN_CLASSB_NET 0xffff0000
286 #define IN_CLASSB_NSHIFT 16
287 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
288 #define IN_CLASSB_MAX 65536
290 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
291 #define IN_CLASSC_NET 0xffffff00
292 #define IN_CLASSC_NSHIFT 8
293 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
295 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
296 #define IN_MULTICAST(a) IN_CLASSD(a)
297 #define IN_MULTICAST_NET 0xe0000000
299 #define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff)
300 #define IN_EXPERIMENTAL(a) IN_BADCLASS((a))
302 #define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
303 #define IN_CLASSE_NET 0xffffffff
304 #define IN_CLASSE_NSHIFT 0
306 /* Address to accept any incoming messages. */
307 #define INADDR_ANY ((unsigned long int) 0x00000000)
309 /* Address to send to all hosts. */
310 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
312 /* Address indicating an error return. */
313 #define INADDR_NONE ((unsigned long int) 0xffffffff)
315 /* Dummy address for src of ICMP replies if no real address is set (RFC7600). */
316 #define INADDR_DUMMY ((unsigned long int) 0xc0000008)
318 /* Network number for local host loopback. */
319 #define IN_LOOPBACKNET 127
321 /* Address to loopback in software to local host. */
322 #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
323 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
325 /* Defines for Multicast INADDR */
326 #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
327 #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
328 #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
329 #define INADDR_ALLSNOOPERS_GROUP 0xe000006aU /* 224.0.0.106 */
330 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
333 /* <asm/byteorder.h> contains the htonl type stuff.. */
334 #include <asm/byteorder.h>
337 #endif /* _UAPI_LINUX_IN_H */