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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 */
Diego Beltrami0a694522006-10-03 23:47:05 -070043 IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 IPPROTO_PIM = 103, /* Protocol Independent Multicast */
45
46 IPPROTO_COMP = 108, /* Compression Header protocol */
47 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080048 IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50 IPPROTO_RAW = 255, /* Raw IP packets */
51 IPPROTO_MAX
52};
53
54
55/* Internet address. */
56struct in_addr {
Alexey Dobriyandef42ff2006-08-28 23:57:56 -070057 __be32 s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058};
59
60#define IP_TOS 1
61#define IP_TTL 2
62#define IP_HDRINCL 3
63#define IP_OPTIONS 4
64#define IP_ROUTER_ALERT 5
65#define IP_RECVOPTS 6
66#define IP_RETOPTS 7
67#define IP_PKTINFO 8
68#define IP_PKTOPTIONS 9
69#define IP_MTU_DISCOVER 10
70#define IP_RECVERR 11
71#define IP_RECVTTL 12
72#define IP_RECVTOS 13
73#define IP_MTU 14
74#define IP_FREEBIND 15
75#define IP_IPSEC_POLICY 16
76#define IP_XFRM_POLICY 17
Catherine Zhang2c7946a2006-03-20 22:41:23 -080077#define IP_PASSSEC 18
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79/* BSD compatibility */
80#define IP_RECVRETOPTS IP_RETOPTS
81
82/* IP_MTU_DISCOVER values */
83#define IP_PMTUDISC_DONT 0 /* Never send DF frames */
84#define IP_PMTUDISC_WANT 1 /* Use per route hints */
85#define IP_PMTUDISC_DO 2 /* Always DF */
John Heffner628a5c52007-04-20 15:53:27 -070086#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88#define IP_MULTICAST_IF 32
89#define IP_MULTICAST_TTL 33
90#define IP_MULTICAST_LOOP 34
91#define IP_ADD_MEMBERSHIP 35
92#define IP_DROP_MEMBERSHIP 36
93#define IP_UNBLOCK_SOURCE 37
94#define IP_BLOCK_SOURCE 38
95#define IP_ADD_SOURCE_MEMBERSHIP 39
96#define IP_DROP_SOURCE_MEMBERSHIP 40
97#define IP_MSFILTER 41
98#define MCAST_JOIN_GROUP 42
99#define MCAST_BLOCK_SOURCE 43
100#define MCAST_UNBLOCK_SOURCE 44
101#define MCAST_LEAVE_GROUP 45
102#define MCAST_JOIN_SOURCE_GROUP 46
103#define MCAST_LEAVE_SOURCE_GROUP 47
104#define MCAST_MSFILTER 48
105
106#define MCAST_EXCLUDE 0
107#define MCAST_INCLUDE 1
108
109/* These need to appear somewhere around here */
110#define IP_DEFAULT_MULTICAST_TTL 1
111#define IP_DEFAULT_MULTICAST_LOOP 1
112
113/* Request struct for multicast socket ops */
114
115struct ip_mreq
116{
117 struct in_addr imr_multiaddr; /* IP multicast address of group */
118 struct in_addr imr_interface; /* local IP address of interface */
119};
120
121struct ip_mreqn
122{
123 struct in_addr imr_multiaddr; /* IP multicast address of group */
124 struct in_addr imr_address; /* local IP address of interface */
125 int imr_ifindex; /* Interface index */
126};
127
128struct ip_mreq_source {
Al Viro00a50202006-09-27 18:29:47 -0700129 __be32 imr_multiaddr;
130 __be32 imr_interface;
131 __be32 imr_sourceaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132};
133
134struct ip_msfilter {
Al Viro00a50202006-09-27 18:29:47 -0700135 __be32 imsf_multiaddr;
136 __be32 imsf_interface;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 __u32 imsf_fmode;
138 __u32 imsf_numsrc;
Al Viro00a50202006-09-27 18:29:47 -0700139 __be32 imsf_slist[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140};
141
142#define IP_MSFILTER_SIZE(numsrc) \
143 (sizeof(struct ip_msfilter) - sizeof(__u32) \
144 + (numsrc) * sizeof(__u32))
145
146struct group_req
147{
148 __u32 gr_interface; /* interface index */
149 struct __kernel_sockaddr_storage gr_group; /* group address */
150};
151
152struct group_source_req
153{
154 __u32 gsr_interface; /* interface index */
155 struct __kernel_sockaddr_storage gsr_group; /* group address */
156 struct __kernel_sockaddr_storage gsr_source; /* source address */
157};
158
159struct group_filter
160{
161 __u32 gf_interface; /* interface index */
162 struct __kernel_sockaddr_storage gf_group; /* multicast address */
163 __u32 gf_fmode; /* filter mode */
164 __u32 gf_numsrc; /* number of sources */
165 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
166};
167
168#define GROUP_FILTER_SIZE(numsrc) \
169 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
170 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
171
172struct in_pktinfo
173{
174 int ipi_ifindex;
175 struct in_addr ipi_spec_dst;
176 struct in_addr ipi_addr;
177};
178
179/* Structure describing an Internet (IP) socket address. */
180#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
181struct sockaddr_in {
182 sa_family_t sin_family; /* Address family */
Alexey Dobriyancd360002006-08-28 23:58:32 -0700183 __be16 sin_port; /* Port number */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 struct in_addr sin_addr; /* Internet address */
185
186 /* Pad to size of `struct sockaddr'. */
187 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
188 sizeof(unsigned short int) - sizeof(struct in_addr)];
189};
190#define sin_zero __pad /* for BSD UNIX comp. -FvK */
191
192
193/*
194 * Definitions of the bits in an Internet address integer.
195 * On subnets, host and network parts are found according
196 * to the subnet mask, not these masks.
197 */
198#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
199#define IN_CLASSA_NET 0xff000000
200#define IN_CLASSA_NSHIFT 24
201#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
202#define IN_CLASSA_MAX 128
203
204#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
205#define IN_CLASSB_NET 0xffff0000
206#define IN_CLASSB_NSHIFT 16
207#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
208#define IN_CLASSB_MAX 65536
209
210#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
211#define IN_CLASSC_NET 0xffffff00
212#define IN_CLASSC_NSHIFT 8
213#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
214
215#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
216#define IN_MULTICAST(a) IN_CLASSD(a)
217#define IN_MULTICAST_NET 0xF0000000
218
219#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
220#define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
221
222/* Address to accept any incoming messages. */
223#define INADDR_ANY ((unsigned long int) 0x00000000)
224
225/* Address to send to all hosts. */
226#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
227
228/* Address indicating an error return. */
229#define INADDR_NONE ((unsigned long int) 0xffffffff)
230
231/* Network number for local host loopback. */
232#define IN_LOOPBACKNET 127
233
234/* Address to loopback in software to local host. */
235#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
236#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
237
238/* Defines for Multicast INADDR */
239#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
240#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
241#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
242#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
243
244
245/* <asm/byteorder.h> contains the htonl type stuff.. */
246#include <asm/byteorder.h>
247
248#ifdef __KERNEL__
Joe Perches2658fa82007-12-16 13:42:49 -0800249
250static inline bool ipv4_is_loopback(__be32 addr)
251{
252 return (addr & htonl(0xff000000)) == htonl(0x7f000000);
253}
254
255static inline bool ipv4_is_multicast(__be32 addr)
256{
257 return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
258}
259
260static inline bool ipv4_is_local_multicast(__be32 addr)
261{
262 return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
263}
264
Jan Engelhardt1e637c72008-01-21 03:18:08 -0800265static inline bool ipv4_is_lbcast(__be32 addr)
Joe Perches2658fa82007-12-16 13:42:49 -0800266{
Jan Engelhardt1e637c72008-01-21 03:18:08 -0800267 /* limited broadcast */
268 return addr == INADDR_BROADCAST;
Joe Perches2658fa82007-12-16 13:42:49 -0800269}
270
271static inline bool ipv4_is_zeronet(__be32 addr)
272{
273 return (addr & htonl(0xff000000)) == htonl(0x00000000);
274}
275
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100276/* Special-Use IPv4 Addresses (RFC3330) */
Joe Perches2658fa82007-12-16 13:42:49 -0800277
278static inline bool ipv4_is_private_10(__be32 addr)
279{
280 return (addr & htonl(0xff000000)) == htonl(0x0a000000);
281}
282
283static inline bool ipv4_is_private_172(__be32 addr)
284{
285 return (addr & htonl(0xfff00000)) == htonl(0xac100000);
286}
287
288static inline bool ipv4_is_private_192(__be32 addr)
289{
290 return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
291}
292
293static inline bool ipv4_is_linklocal_169(__be32 addr)
294{
295 return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
296}
297
298static inline bool ipv4_is_anycast_6to4(__be32 addr)
299{
300 return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
301}
302
303static inline bool ipv4_is_test_192(__be32 addr)
304{
305 return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
306}
307
308static inline bool ipv4_is_test_198(__be32 addr)
309{
310 return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
311}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312#endif
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314#endif /* _LINUX_IN_H */