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