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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/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_RAW = 255, /* Raw IP packets */
83#define IPPROTO_RAW IPPROTO_RAW
84 IPPROTO_MPTCP = 262, /* Multipath TCP connection */
85#define IPPROTO_MPTCP IPPROTO_MPTCP
86 IPPROTO_MAX
87};
88#endif
89
90#if __UAPI_DEF_IN_ADDR
91/* Internet address. */
92struct in_addr {
93 __be32 s_addr;
94};
95#endif
96
97#define IP_TOS 1
98#define IP_TTL 2
99#define IP_HDRINCL 3
100#define IP_OPTIONS 4
101#define IP_ROUTER_ALERT 5
102#define IP_RECVOPTS 6
103#define IP_RETOPTS 7
104#define IP_PKTINFO 8
105#define IP_PKTOPTIONS 9
106#define IP_MTU_DISCOVER 10
107#define IP_RECVERR 11
108#define IP_RECVTTL 12
109#define IP_RECVTOS 13
110#define IP_MTU 14
111#define IP_FREEBIND 15
112#define IP_IPSEC_POLICY 16
113#define IP_XFRM_POLICY 17
114#define IP_PASSSEC 18
115#define IP_TRANSPARENT 19
116
117/* BSD compatibility */
118#define IP_RECVRETOPTS IP_RETOPTS
119
120/* TProxy original addresses */
121#define IP_ORIGDSTADDR 20
122#define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
123
124#define IP_MINTTL 21
125#define IP_NODEFRAG 22
126#define IP_CHECKSUM 23
127#define IP_BIND_ADDRESS_NO_PORT 24
128#define IP_RECVFRAGSIZE 25
129#define IP_RECVERR_RFC4884 26
130
131/* IP_MTU_DISCOVER values */
132#define IP_PMTUDISC_DONT 0 /* Never send DF frames */
133#define IP_PMTUDISC_WANT 1 /* Use per route hints */
134#define IP_PMTUDISC_DO 2 /* Always DF */
135#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
136/* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
137 * Also incoming ICMP frag_needed notifications will be ignored on
138 * this socket to prevent accepting spoofed ones.
139 */
140#define IP_PMTUDISC_INTERFACE 4
141/* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get
142 * fragmented if they exeed the interface mtu
143 */
144#define IP_PMTUDISC_OMIT 5
145
146#define IP_MULTICAST_IF 32
147#define IP_MULTICAST_TTL 33
148#define IP_MULTICAST_LOOP 34
149#define IP_ADD_MEMBERSHIP 35
150#define IP_DROP_MEMBERSHIP 36
151#define IP_UNBLOCK_SOURCE 37
152#define IP_BLOCK_SOURCE 38
153#define IP_ADD_SOURCE_MEMBERSHIP 39
154#define IP_DROP_SOURCE_MEMBERSHIP 40
155#define IP_MSFILTER 41
156#define MCAST_JOIN_GROUP 42
157#define MCAST_BLOCK_SOURCE 43
158#define MCAST_UNBLOCK_SOURCE 44
159#define MCAST_LEAVE_GROUP 45
160#define MCAST_JOIN_SOURCE_GROUP 46
161#define MCAST_LEAVE_SOURCE_GROUP 47
162#define MCAST_MSFILTER 48
163#define IP_MULTICAST_ALL 49
164#define IP_UNICAST_IF 50
165
166#define MCAST_EXCLUDE 0
167#define MCAST_INCLUDE 1
168
169/* These need to appear somewhere around here */
170#define IP_DEFAULT_MULTICAST_TTL 1
171#define IP_DEFAULT_MULTICAST_LOOP 1
172
173/* Request struct for multicast socket ops */
174
175#if __UAPI_DEF_IP_MREQ
176struct ip_mreq {
177 struct in_addr imr_multiaddr; /* IP multicast address of group */
178 struct in_addr imr_interface; /* local IP address of interface */
179};
180
181struct ip_mreqn {
182 struct in_addr imr_multiaddr; /* IP multicast address of group */
183 struct in_addr imr_address; /* local IP address of interface */
184 int imr_ifindex; /* Interface index */
185};
186
187struct ip_mreq_source {
188 __be32 imr_multiaddr;
189 __be32 imr_interface;
190 __be32 imr_sourceaddr;
191};
192
193struct ip_msfilter {
194 __be32 imsf_multiaddr;
195 __be32 imsf_interface;
196 __u32 imsf_fmode;
197 __u32 imsf_numsrc;
198 union {
199 __be32 imsf_slist[1];
200 __DECLARE_FLEX_ARRAY(__be32, imsf_slist_flex);
201 };
202};
203
204#define IP_MSFILTER_SIZE(numsrc) \
205 (sizeof(struct ip_msfilter) - sizeof(__u32) \
206 + (numsrc) * sizeof(__u32))
207
208struct group_req {
209 __u32 gr_interface; /* interface index */
210 struct __kernel_sockaddr_storage gr_group; /* group address */
211};
212
213struct group_source_req {
214 __u32 gsr_interface; /* interface index */
215 struct __kernel_sockaddr_storage gsr_group; /* group address */
216 struct __kernel_sockaddr_storage gsr_source; /* source address */
217};
218
219struct group_filter {
220 union {
221 struct {
222 __u32 gf_interface_aux; /* interface index */
223 struct __kernel_sockaddr_storage gf_group_aux; /* multicast address */
224 __u32 gf_fmode_aux; /* filter mode */
225 __u32 gf_numsrc_aux; /* number of sources */
226 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
227 };
228 struct {
229 __u32 gf_interface; /* interface index */
230 struct __kernel_sockaddr_storage gf_group; /* multicast address */
231 __u32 gf_fmode; /* filter mode */
232 __u32 gf_numsrc; /* number of sources */
233 struct __kernel_sockaddr_storage gf_slist_flex[]; /* interface index */
234 };
235 };
236};
237
238#define GROUP_FILTER_SIZE(numsrc) \
239 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
240 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
241#endif
242
243#if __UAPI_DEF_IN_PKTINFO
244struct in_pktinfo {
245 int ipi_ifindex;
246 struct in_addr ipi_spec_dst;
247 struct in_addr ipi_addr;
248};
249#endif
250
251/* Structure describing an Internet (IP) socket address. */
252#if __UAPI_DEF_SOCKADDR_IN
253#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
254struct sockaddr_in {
255 __kernel_sa_family_t sin_family; /* Address family */
256 __be16 sin_port; /* Port number */
257 struct in_addr sin_addr; /* Internet address */
258
259 /* Pad to size of `struct sockaddr'. */
260 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
261 sizeof(unsigned short int) - sizeof(struct in_addr)];
262};
263#define sin_zero __pad /* for BSD UNIX comp. -FvK */
264#endif
265
266#if __UAPI_DEF_IN_CLASS
267/*
268 * Definitions of the bits in an Internet address integer.
269 * On subnets, host and network parts are found according
270 * to the subnet mask, not these masks.
271 */
272#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
273#define IN_CLASSA_NET 0xff000000
274#define IN_CLASSA_NSHIFT 24
275#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
276#define IN_CLASSA_MAX 128
277
278#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
279#define IN_CLASSB_NET 0xffff0000
280#define IN_CLASSB_NSHIFT 16
281#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
282#define IN_CLASSB_MAX 65536
283
284#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
285#define IN_CLASSC_NET 0xffffff00
286#define IN_CLASSC_NSHIFT 8
287#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
288
289#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
290#define IN_MULTICAST(a) IN_CLASSD(a)
291#define IN_MULTICAST_NET 0xe0000000
292
293#define IN_BADCLASS(a) (((long int) (a) ) == (long int)0xffffffff)
294#define IN_EXPERIMENTAL(a) IN_BADCLASS((a))
295
296#define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
297#define IN_CLASSE_NET 0xffffffff
298#define IN_CLASSE_NSHIFT 0
299
300/* Address to accept any incoming messages. */
301#define INADDR_ANY ((unsigned long int) 0x00000000)
302
303/* Address to send to all hosts. */
304#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
305
306/* Address indicating an error return. */
307#define INADDR_NONE ((unsigned long int) 0xffffffff)
308
309/* Dummy address for src of ICMP replies if no real address is set (RFC7600). */
310#define INADDR_DUMMY ((unsigned long int) 0xc0000008)
311
312/* Network number for local host loopback. */
313#define IN_LOOPBACKNET 127
314
315/* Address to loopback in software to local host. */
316#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
317#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
318
319/* Defines for Multicast INADDR */
320#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
321#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
322#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
323#define INADDR_ALLSNOOPERS_GROUP 0xe000006aU /* 224.0.0.106 */
324#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
325#endif
326
327/* <asm/byteorder.h> contains the htonl type stuff.. */
328#include <asm/byteorder.h>
329
330
331#endif /* _UAPI_LINUX_IN_H */