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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_DCCP = 33, /* Datagram Congestion Control Protocol */
36 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_BEETPH = 94, /* IP option pseudo header for BEET */
44 IPPROTO_PIM = 103, /* Protocol Independent Multicast */
45
46 IPPROTO_COMP = 108, /* Compression Header protocol */
47 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
48 IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */
49
50 IPPROTO_RAW = 255, /* Raw IP packets */
51 IPPROTO_MAX
52};
53
54
55/* Internet address. */
56struct in_addr {
57 __be32 s_addr;
58};
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
77#define IP_PASSSEC 18
78#define IP_TRANSPARENT 19
79
80/* BSD compatibility */
81#define IP_RECVRETOPTS IP_RETOPTS
82
83/* IP_MTU_DISCOVER values */
84#define IP_PMTUDISC_DONT 0 /* Never send DF frames */
85#define IP_PMTUDISC_WANT 1 /* Use per route hints */
86#define IP_PMTUDISC_DO 2 /* Always DF */
87#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
88
89#define IP_MULTICAST_IF 32
90#define IP_MULTICAST_TTL 33
91#define IP_MULTICAST_LOOP 34
92#define IP_ADD_MEMBERSHIP 35
93#define IP_DROP_MEMBERSHIP 36
94#define IP_UNBLOCK_SOURCE 37
95#define IP_BLOCK_SOURCE 38
96#define IP_ADD_SOURCE_MEMBERSHIP 39
97#define IP_DROP_SOURCE_MEMBERSHIP 40
98#define IP_MSFILTER 41
99#define MCAST_JOIN_GROUP 42
100#define MCAST_BLOCK_SOURCE 43
101#define MCAST_UNBLOCK_SOURCE 44
102#define MCAST_LEAVE_GROUP 45
103#define MCAST_JOIN_SOURCE_GROUP 46
104#define MCAST_LEAVE_SOURCE_GROUP 47
105#define MCAST_MSFILTER 48
106
107#define MCAST_EXCLUDE 0
108#define MCAST_INCLUDE 1
109
110/* These need to appear somewhere around here */
111#define IP_DEFAULT_MULTICAST_TTL 1
112#define IP_DEFAULT_MULTICAST_LOOP 1
113
114/* Request struct for multicast socket ops */
115
116struct ip_mreq
117{
118 struct in_addr imr_multiaddr; /* IP multicast address of group */
119 struct in_addr imr_interface; /* local IP address of interface */
120};
121
122struct ip_mreqn
123{
124 struct in_addr imr_multiaddr; /* IP multicast address of group */
125 struct in_addr imr_address; /* local IP address of interface */
126 int imr_ifindex; /* Interface index */
127};
128
129struct ip_mreq_source {
130 __be32 imr_multiaddr;
131 __be32 imr_interface;
132 __be32 imr_sourceaddr;
133};
134
135struct ip_msfilter {
136 __be32 imsf_multiaddr;
137 __be32 imsf_interface;
138 __u32 imsf_fmode;
139 __u32 imsf_numsrc;
140 __be32 imsf_slist[1];
141};
142
143#define IP_MSFILTER_SIZE(numsrc) \
144 (sizeof(struct ip_msfilter) - sizeof(__u32) \
145 + (numsrc) * sizeof(__u32))
146
147struct group_req
148{
149 __u32 gr_interface; /* interface index */
150 struct __kernel_sockaddr_storage gr_group; /* group address */
151};
152
153struct group_source_req
154{
155 __u32 gsr_interface; /* interface index */
156 struct __kernel_sockaddr_storage gsr_group; /* group address */
157 struct __kernel_sockaddr_storage gsr_source; /* source address */
158};
159
160struct group_filter
161{
162 __u32 gf_interface; /* interface index */
163 struct __kernel_sockaddr_storage gf_group; /* multicast address */
164 __u32 gf_fmode; /* filter mode */
165 __u32 gf_numsrc; /* number of sources */
166 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
167};
168
169#define GROUP_FILTER_SIZE(numsrc) \
170 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
171 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
172
173struct in_pktinfo
174{
175 int ipi_ifindex;
176 struct in_addr ipi_spec_dst;
177 struct in_addr ipi_addr;
178};
179
180/* Structure describing an Internet (IP) socket address. */
181#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
182struct sockaddr_in {
183 sa_family_t sin_family; /* Address family */
184 __be16 sin_port; /* Port number */
185 struct in_addr sin_addr; /* Internet address */
186
187 /* Pad to size of `struct sockaddr'. */
188 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
189 sizeof(unsigned short int) - sizeof(struct in_addr)];
190};
191#define sin_zero __pad /* for BSD UNIX comp. -FvK */
192
193
194/*
195 * Definitions of the bits in an Internet address integer.
196 * On subnets, host and network parts are found according
197 * to the subnet mask, not these masks.
198 */
199#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
200#define IN_CLASSA_NET 0xff000000
201#define IN_CLASSA_NSHIFT 24
202#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
203#define IN_CLASSA_MAX 128
204
205#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
206#define IN_CLASSB_NET 0xffff0000
207#define IN_CLASSB_NSHIFT 16
208#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
209#define IN_CLASSB_MAX 65536
210
211#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
212#define IN_CLASSC_NET 0xffffff00
213#define IN_CLASSC_NSHIFT 8
214#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
215
216#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
217#define IN_MULTICAST(a) IN_CLASSD(a)
218#define IN_MULTICAST_NET 0xF0000000
219
220#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
221#define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
222
223/* Address to accept any incoming messages. */
224#define INADDR_ANY ((unsigned long int) 0x00000000)
225
226/* Address to send to all hosts. */
227#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
228
229/* Address indicating an error return. */
230#define INADDR_NONE ((unsigned long int) 0xffffffff)
231
232/* Network number for local host loopback. */
233#define IN_LOOPBACKNET 127
234
235/* Address to loopback in software to local host. */
236#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
237#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
238
239/* Defines for Multicast INADDR */
240#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
241#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
242#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
243#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
244
245
246/* <asm/byteorder.h> contains the htonl type stuff.. */
247#include <asm/byteorder.h>
248
249#ifdef __KERNEL__
250
251static inline bool ipv4_is_loopback(__be32 addr)
252{
253 return (addr & htonl(0xff000000)) == htonl(0x7f000000);
254}
255
256static inline bool ipv4_is_multicast(__be32 addr)
257{
258 return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
259}
260
261static inline bool ipv4_is_local_multicast(__be32 addr)
262{
263 return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
264}
265
266static inline bool ipv4_is_lbcast(__be32 addr)
267{
268 /* limited broadcast */
269 return addr == htonl(INADDR_BROADCAST);
270}
271
272static inline bool ipv4_is_zeronet(__be32 addr)
273{
274 return (addr & htonl(0xff000000)) == htonl(0x00000000);
275}
276
277/* Special-Use IPv4 Addresses (RFC3330) */
278
279static inline bool ipv4_is_private_10(__be32 addr)
280{
281 return (addr & htonl(0xff000000)) == htonl(0x0a000000);
282}
283
284static inline bool ipv4_is_private_172(__be32 addr)
285{
286 return (addr & htonl(0xfff00000)) == htonl(0xac100000);
287}
288
289static inline bool ipv4_is_private_192(__be32 addr)
290{
291 return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
292}
293
294static inline bool ipv4_is_linklocal_169(__be32 addr)
295{
296 return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
297}
298
299static inline bool ipv4_is_anycast_6to4(__be32 addr)
300{
301 return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
302}
303
304static inline bool ipv4_is_test_192(__be32 addr)
305{
306 return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
307}
308
309static inline bool ipv4_is_test_198(__be32 addr)
310{
311 return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
312}
313#endif
314
315#endif /* _LINUX_IN_H */