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. */
28enum {
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. */
89struct 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
173struct 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
178struct 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
184struct ip_mreq_source {
185 __be32 imr_multiaddr;
186 __be32 imr_interface;
187 __be32 imr_sourceaddr;
188};
189
190struct ip_msfilter {
191 union {
192 struct {
193 __be32 imsf_multiaddr_aux;
194 __be32 imsf_interface_aux;
195 __u32 imsf_fmode_aux;
196 __u32 imsf_numsrc_aux;
197 __be32 imsf_slist[1];
198 };
199 struct {
200 __be32 imsf_multiaddr;
201 __be32 imsf_interface;
202 __u32 imsf_fmode;
203 __u32 imsf_numsrc;
204 __be32 imsf_slist_flex[];
205 };
206 };
207};
208
209#define IP_MSFILTER_SIZE(numsrc) \
210 (sizeof(struct ip_msfilter) - sizeof(__u32) \
211 + (numsrc) * sizeof(__u32))
212
213struct group_req {
214 __u32 gr_interface; /* interface index */
215 struct __kernel_sockaddr_storage gr_group; /* group address */
216};
217
218struct group_source_req {
219 __u32 gsr_interface; /* interface index */
220 struct __kernel_sockaddr_storage gsr_group; /* group address */
221 struct __kernel_sockaddr_storage gsr_source; /* source address */
222};
223
224struct group_filter {
225 union {
226 struct {
227 __u32 gf_interface_aux; /* interface index */
228 struct __kernel_sockaddr_storage gf_group_aux; /* multicast address */
229 __u32 gf_fmode_aux; /* filter mode */
230 __u32 gf_numsrc_aux; /* number of sources */
231 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
232 };
233 struct {
234 __u32 gf_interface; /* interface index */
235 struct __kernel_sockaddr_storage gf_group; /* multicast address */
236 __u32 gf_fmode; /* filter mode */
237 __u32 gf_numsrc; /* number of sources */
238 struct __kernel_sockaddr_storage gf_slist_flex[]; /* interface index */
239 };
240 };
241};
242
243#define GROUP_FILTER_SIZE(numsrc) \
244 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
245 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
246#endif
247
248#if __UAPI_DEF_IN_PKTINFO
249struct in_pktinfo {
250 int ipi_ifindex;
251 struct in_addr ipi_spec_dst;
252 struct in_addr ipi_addr;
253};
254#endif
255
256/* Structure describing an Internet (IP) socket address. */
257#if __UAPI_DEF_SOCKADDR_IN
258#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
259struct sockaddr_in {
260 __kernel_sa_family_t sin_family; /* Address family */
261 __be16 sin_port; /* Port number */
262 struct in_addr sin_addr; /* Internet address */
263
264 /* Pad to size of `struct sockaddr'. */
265 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
266 sizeof(unsigned short int) - sizeof(struct in_addr)];
267};
268#define sin_zero __pad /* for BSD UNIX comp. -FvK */
269#endif
270
271#if __UAPI_DEF_IN_CLASS
272/*
273 * Definitions of the bits in an Internet address integer.
274 * On subnets, host and network parts are found according
275 * to the subnet mask, not these masks.
276 */
277#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
278#define IN_CLASSA_NET 0xff000000
279#define IN_CLASSA_NSHIFT 24
280#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
281#define IN_CLASSA_MAX 128
282
283#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
284#define IN_CLASSB_NET 0xffff0000
285#define IN_CLASSB_NSHIFT 16
286#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
287#define IN_CLASSB_MAX 65536
288
289#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
290#define IN_CLASSC_NET 0xffffff00
291#define IN_CLASSC_NSHIFT 8
292#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
293
294#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
295#define IN_MULTICAST(a) IN_CLASSD(a)
296#define IN_MULTICAST_NET 0xe0000000
297
298#define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff)
299#define IN_EXPERIMENTAL(a) IN_BADCLASS((a))
300
301#define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
302#define IN_CLASSE_NET 0xffffffff
303#define IN_CLASSE_NSHIFT 0
304
305/* Address to accept any incoming messages. */
306#define INADDR_ANY ((unsigned long int) 0x00000000)
307
308/* Address to send to all hosts. */
309#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
310
311/* Address indicating an error return. */
312#define INADDR_NONE ((unsigned long int) 0xffffffff)
313
314/* Dummy address for src of ICMP replies if no real address is set (RFC7600). */
315#define INADDR_DUMMY ((unsigned long int) 0xc0000008)
316
317/* Network number for local host loopback. */
318#define IN_LOOPBACKNET 127
319
320/* Address to loopback in software to local host. */
321#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
322#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
323
324/* Defines for Multicast INADDR */
325#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
326#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
327#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
328#define INADDR_ALLSNOOPERS_GROUP 0xe000006aU /* 224.0.0.106 */
329#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
330#endif
331
332/* <asm/byteorder.h> contains the htonl type stuff.. */
333#include <asm/byteorder.h>
334
335
336#endif /* _UAPI_LINUX_IN_H */
337

source code of linux/include/uapi/linux/in.h