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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions of the Internet Protocol.
7 *
8 * Version: @(#)in.h 1.0.1 04/21/93
9 *
10 * Authors: Original taken from the GNU Project <netinet/in.h> file.
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
17 */
18#ifndef _LINUX_IN_H
19#define _LINUX_IN_H
20
21#include <linux/types.h>
22#include <linux/socket.h>
23
24/* Standard well-defined IP protocols. */
25enum {
26 IPPROTO_IP = 0, /* Dummy protocol for TCP */
27 IPPROTO_ICMP = 1, /* Internet Control Message Protocol */
28 IPPROTO_IGMP = 2, /* Internet Group Management Protocol */
29 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */
30 IPPROTO_TCP = 6, /* Transmission Control Protocol */
31 IPPROTO_EGP = 8, /* Exterior Gateway Protocol */
32 IPPROTO_PUP = 12, /* PUP protocol */
33 IPPROTO_UDP = 17, /* User Datagram Protocol */
34 IPPROTO_IDP = 22, /* XNS IDP protocol */
Arnaldo Carvalho de Melo7c657872005-08-09 20:14:34 -070035 IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 IPPROTO_RSVP = 46, /* RSVP protocol */
37 IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */
38
39 IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */
40
41 IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */
42 IPPROTO_AH = 51, /* Authentication Header protocol */
43 IPPROTO_PIM = 103, /* Protocol Independent Multicast */
44
45 IPPROTO_COMP = 108, /* Compression Header protocol */
46 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
47
48 IPPROTO_RAW = 255, /* Raw IP packets */
49 IPPROTO_MAX
50};
51
52
53/* Internet address. */
54struct in_addr {
55 __u32 s_addr;
56};
57
58#define IP_TOS 1
59#define IP_TTL 2
60#define IP_HDRINCL 3
61#define IP_OPTIONS 4
62#define IP_ROUTER_ALERT 5
63#define IP_RECVOPTS 6
64#define IP_RETOPTS 7
65#define IP_PKTINFO 8
66#define IP_PKTOPTIONS 9
67#define IP_MTU_DISCOVER 10
68#define IP_RECVERR 11
69#define IP_RECVTTL 12
70#define IP_RECVTOS 13
71#define IP_MTU 14
72#define IP_FREEBIND 15
73#define IP_IPSEC_POLICY 16
74#define IP_XFRM_POLICY 17
75
76/* BSD compatibility */
77#define IP_RECVRETOPTS IP_RETOPTS
78
79/* IP_MTU_DISCOVER values */
80#define IP_PMTUDISC_DONT 0 /* Never send DF frames */
81#define IP_PMTUDISC_WANT 1 /* Use per route hints */
82#define IP_PMTUDISC_DO 2 /* Always DF */
83
84#define IP_MULTICAST_IF 32
85#define IP_MULTICAST_TTL 33
86#define IP_MULTICAST_LOOP 34
87#define IP_ADD_MEMBERSHIP 35
88#define IP_DROP_MEMBERSHIP 36
89#define IP_UNBLOCK_SOURCE 37
90#define IP_BLOCK_SOURCE 38
91#define IP_ADD_SOURCE_MEMBERSHIP 39
92#define IP_DROP_SOURCE_MEMBERSHIP 40
93#define IP_MSFILTER 41
94#define MCAST_JOIN_GROUP 42
95#define MCAST_BLOCK_SOURCE 43
96#define MCAST_UNBLOCK_SOURCE 44
97#define MCAST_LEAVE_GROUP 45
98#define MCAST_JOIN_SOURCE_GROUP 46
99#define MCAST_LEAVE_SOURCE_GROUP 47
100#define MCAST_MSFILTER 48
101
102#define MCAST_EXCLUDE 0
103#define MCAST_INCLUDE 1
104
105/* These need to appear somewhere around here */
106#define IP_DEFAULT_MULTICAST_TTL 1
107#define IP_DEFAULT_MULTICAST_LOOP 1
108
109/* Request struct for multicast socket ops */
110
111struct ip_mreq
112{
113 struct in_addr imr_multiaddr; /* IP multicast address of group */
114 struct in_addr imr_interface; /* local IP address of interface */
115};
116
117struct ip_mreqn
118{
119 struct in_addr imr_multiaddr; /* IP multicast address of group */
120 struct in_addr imr_address; /* local IP address of interface */
121 int imr_ifindex; /* Interface index */
122};
123
124struct ip_mreq_source {
125 __u32 imr_multiaddr;
126 __u32 imr_interface;
127 __u32 imr_sourceaddr;
128};
129
130struct ip_msfilter {
131 __u32 imsf_multiaddr;
132 __u32 imsf_interface;
133 __u32 imsf_fmode;
134 __u32 imsf_numsrc;
135 __u32 imsf_slist[1];
136};
137
138#define IP_MSFILTER_SIZE(numsrc) \
139 (sizeof(struct ip_msfilter) - sizeof(__u32) \
140 + (numsrc) * sizeof(__u32))
141
142struct group_req
143{
144 __u32 gr_interface; /* interface index */
145 struct __kernel_sockaddr_storage gr_group; /* group address */
146};
147
148struct group_source_req
149{
150 __u32 gsr_interface; /* interface index */
151 struct __kernel_sockaddr_storage gsr_group; /* group address */
152 struct __kernel_sockaddr_storage gsr_source; /* source address */
153};
154
155struct group_filter
156{
157 __u32 gf_interface; /* interface index */
158 struct __kernel_sockaddr_storage gf_group; /* multicast address */
159 __u32 gf_fmode; /* filter mode */
160 __u32 gf_numsrc; /* number of sources */
161 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
162};
163
164#define GROUP_FILTER_SIZE(numsrc) \
165 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
166 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
167
168struct in_pktinfo
169{
170 int ipi_ifindex;
171 struct in_addr ipi_spec_dst;
172 struct in_addr ipi_addr;
173};
174
175/* Structure describing an Internet (IP) socket address. */
176#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
177struct sockaddr_in {
178 sa_family_t sin_family; /* Address family */
179 unsigned short int sin_port; /* Port number */
180 struct in_addr sin_addr; /* Internet address */
181
182 /* Pad to size of `struct sockaddr'. */
183 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
184 sizeof(unsigned short int) - sizeof(struct in_addr)];
185};
186#define sin_zero __pad /* for BSD UNIX comp. -FvK */
187
188
189/*
190 * Definitions of the bits in an Internet address integer.
191 * On subnets, host and network parts are found according
192 * to the subnet mask, not these masks.
193 */
194#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
195#define IN_CLASSA_NET 0xff000000
196#define IN_CLASSA_NSHIFT 24
197#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
198#define IN_CLASSA_MAX 128
199
200#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
201#define IN_CLASSB_NET 0xffff0000
202#define IN_CLASSB_NSHIFT 16
203#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
204#define IN_CLASSB_MAX 65536
205
206#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
207#define IN_CLASSC_NET 0xffffff00
208#define IN_CLASSC_NSHIFT 8
209#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
210
211#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
212#define IN_MULTICAST(a) IN_CLASSD(a)
213#define IN_MULTICAST_NET 0xF0000000
214
215#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
216#define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
217
218/* Address to accept any incoming messages. */
219#define INADDR_ANY ((unsigned long int) 0x00000000)
220
221/* Address to send to all hosts. */
222#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
223
224/* Address indicating an error return. */
225#define INADDR_NONE ((unsigned long int) 0xffffffff)
226
227/* Network number for local host loopback. */
228#define IN_LOOPBACKNET 127
229
230/* Address to loopback in software to local host. */
231#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
232#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
233
234/* Defines for Multicast INADDR */
235#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
236#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
237#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
238#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
239
240
241/* <asm/byteorder.h> contains the htonl type stuff.. */
242#include <asm/byteorder.h>
243
244#ifdef __KERNEL__
245/* Some random defines to make it easier in the kernel.. */
246#define LOOPBACK(x) (((x) & htonl(0xff000000)) == htonl(0x7f000000))
247#define MULTICAST(x) (((x) & htonl(0xf0000000)) == htonl(0xe0000000))
248#define BADCLASS(x) (((x) & htonl(0xf0000000)) == htonl(0xf0000000))
249#define ZERONET(x) (((x) & htonl(0xff000000)) == htonl(0x00000000))
250#define LOCAL_MCAST(x) (((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000))
251
252#endif
253
254#endif /* _LINUX_IN_H */