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 _LINUX_IN_H
20#define _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. */
29enum {
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
90 IPPROTO_MAX
91};
92#endif
93
94#if __UAPI_DEF_IN_ADDR
95/* Internet address. */
96struct in_addr {
97 __be32 s_addr;
98};
99#endif
100
101#define IP_TOS 1
102#define IP_TTL 2
103#define IP_HDRINCL 3
104#define IP_OPTIONS 4
105#define IP_ROUTER_ALERT 5
106#define IP_RECVOPTS 6
107#define IP_RETOPTS 7
108#define IP_PKTINFO 8
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
114#define IP_MTU 14
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
120
121/* BSD compatibility */
122#define IP_RECVRETOPTS IP_RETOPTS
123
124/* TProxy original addresses */
125#define IP_ORIGDSTADDR 20
126#define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
127
128#define IP_MINTTL 21
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
134
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.
143 */
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
147 */
148#define IP_PMTUDISC_OMIT 5
149
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
171
172#define MCAST_EXCLUDE 0
173#define MCAST_INCLUDE 1
174
175/* These need to appear somewhere around here */
176#define IP_DEFAULT_MULTICAST_TTL 1
177#define IP_DEFAULT_MULTICAST_LOOP 1
178
179/* Request struct for multicast socket ops */
180
181#if __UAPI_DEF_IP_MREQ
182struct ip_mreq {
183 struct in_addr imr_multiaddr; /* IP multicast address of group */
184 struct in_addr imr_interface; /* local IP address of interface */
185};
186
187struct ip_mreqn {
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 */
191};
192
193struct ip_mreq_source {
194 __be32 imr_multiaddr;
195 __be32 imr_interface;
196 __be32 imr_sourceaddr;
197};
198
199struct ip_msfilter {
200 __be32 imsf_multiaddr;
201 __be32 imsf_interface;
202 __u32 imsf_fmode;
203 __u32 imsf_numsrc;
204 union {
205 __be32 imsf_slist[1];
206 __DECLARE_FLEX_ARRAY(__be32, imsf_slist_flex);
207 };
208};
209
210#define IP_MSFILTER_SIZE(numsrc) \
211 (sizeof(struct ip_msfilter) - sizeof(__u32) \
212 + (numsrc) * sizeof(__u32))
213
214struct group_req {
215 __u32 gr_interface; /* interface index */
216 struct __kernel_sockaddr_storage gr_group; /* group address */
217};
218
219struct 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 */
223};
224
225struct group_filter {
226 union {
227 struct {
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 */
233 };
234 struct {
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 */
240 };
241 };
242};
243
244#define GROUP_FILTER_SIZE(numsrc) \
245 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
246 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
247#endif
248
249#if __UAPI_DEF_IN_PKTINFO
250struct in_pktinfo {
251 int ipi_ifindex;
252 struct in_addr ipi_spec_dst;
253 struct in_addr ipi_addr;
254};
255#endif
256
257/* Structure describing an Internet (IP) socket address. */
258#if __UAPI_DEF_SOCKADDR_IN
259#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
260struct sockaddr_in {
261 __kernel_sa_family_t sin_family; /* Address family */
262 __be16 sin_port; /* Port number */
263 struct in_addr sin_addr; /* Internet address */
264
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)];
268};
269#define sin_zero __pad /* for BSD UNIX comp. -FvK */
270#endif
271
272#if __UAPI_DEF_IN_CLASS
273/*
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.
277 */
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
283
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
289
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)
294
295#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
296#define IN_MULTICAST(a) IN_CLASSD(a)
297#define IN_MULTICAST_NET 0xe0000000
298
299#define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff)
300#define IN_EXPERIMENTAL(a) IN_BADCLASS((a))
301
302#define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
303#define IN_CLASSE_NET 0xffffffff
304#define IN_CLASSE_NSHIFT 0
305
306/* Address to accept any incoming messages. */
307#define INADDR_ANY ((unsigned long int) 0x00000000)
308
309/* Address to send to all hosts. */
310#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
311
312/* Address indicating an error return. */
313#define INADDR_NONE ((unsigned long int) 0xffffffff)
314
315/* Dummy address for src of ICMP replies if no real address is set (RFC7600). */
316#define INADDR_DUMMY ((unsigned long int) 0xc0000008)
317
318/* Network number for local host loopback. */
319#define IN_LOOPBACKNET 127
320
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)
324
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 */
331#endif
332
333/* <asm/byteorder.h> contains the htonl type stuff.. */
334#include <asm/byteorder.h>
335
336
337#endif /* _LINUX_IN_H */