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_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. */
85struct 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
168struct 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
173struct 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
179struct ip_mreq_source {
180 __be32 imr_multiaddr;
181 __be32 imr_interface;
182 __be32 imr_sourceaddr;
183};
184
185struct 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
197struct group_req {
198 __u32 gr_interface; /* interface index */
199 struct __kernel_sockaddr_storage gr_group; /* group address */
200};
201
202struct 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
208struct 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
222struct 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) */
232struct 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 0xF0000000
270
271#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
272#define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
273
274/* Address to accept any incoming messages. */
275#define INADDR_ANY ((unsigned long int) 0x00000000)
276
277/* Address to send to all hosts. */
278#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
279
280/* Address indicating an error return. */
281#define INADDR_NONE ((unsigned long int) 0xffffffff)
282
283/* Network number for local host loopback. */
284#define IN_LOOPBACKNET 127
285
286/* Address to loopback in software to local host. */
287#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
288#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
289
290/* Defines for Multicast INADDR */
291#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
292#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
293#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
294#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
295#endif
296
297/* <asm/byteorder.h> contains the htonl type stuff.. */
298#include <asm/byteorder.h>
299
300
301#endif /* _UAPI_LINUX_IN_H */
302