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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/* TProxy original addresses */
84#define IP_ORIGDSTADDR 20
85#define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
86
87#define IP_MINTTL 21
88
89/* IP_MTU_DISCOVER values */
90#define IP_PMTUDISC_DONT 0 /* Never send DF frames */
91#define IP_PMTUDISC_WANT 1 /* Use per route hints */
92#define IP_PMTUDISC_DO 2 /* Always DF */
93#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
94
95#define IP_MULTICAST_IF 32
96#define IP_MULTICAST_TTL 33
97#define IP_MULTICAST_LOOP 34
98#define IP_ADD_MEMBERSHIP 35
99#define IP_DROP_MEMBERSHIP 36
100#define IP_UNBLOCK_SOURCE 37
101#define IP_BLOCK_SOURCE 38
102#define IP_ADD_SOURCE_MEMBERSHIP 39
103#define IP_DROP_SOURCE_MEMBERSHIP 40
104#define IP_MSFILTER 41
105#define MCAST_JOIN_GROUP 42
106#define MCAST_BLOCK_SOURCE 43
107#define MCAST_UNBLOCK_SOURCE 44
108#define MCAST_LEAVE_GROUP 45
109#define MCAST_JOIN_SOURCE_GROUP 46
110#define MCAST_LEAVE_SOURCE_GROUP 47
111#define MCAST_MSFILTER 48
112#define IP_MULTICAST_ALL 49
113
114#define MCAST_EXCLUDE 0
115#define MCAST_INCLUDE 1
116
117/* These need to appear somewhere around here */
118#define IP_DEFAULT_MULTICAST_TTL 1
119#define IP_DEFAULT_MULTICAST_LOOP 1
120
121/* Request struct for multicast socket ops */
122
123struct ip_mreq {
124 struct in_addr imr_multiaddr; /* IP multicast address of group */
125 struct in_addr imr_interface; /* local IP address of interface */
126};
127
128struct ip_mreqn {
129 struct in_addr imr_multiaddr; /* IP multicast address of group */
130 struct in_addr imr_address; /* local IP address of interface */
131 int imr_ifindex; /* Interface index */
132};
133
134struct ip_mreq_source {
135 __be32 imr_multiaddr;
136 __be32 imr_interface;
137 __be32 imr_sourceaddr;
138};
139
140struct ip_msfilter {
141 __be32 imsf_multiaddr;
142 __be32 imsf_interface;
143 __u32 imsf_fmode;
144 __u32 imsf_numsrc;
145 __be32 imsf_slist[1];
146};
147
148#define IP_MSFILTER_SIZE(numsrc) \
149 (sizeof(struct ip_msfilter) - sizeof(__u32) \
150 + (numsrc) * sizeof(__u32))
151
152struct group_req {
153 __u32 gr_interface; /* interface index */
154 struct __kernel_sockaddr_storage gr_group; /* group address */
155};
156
157struct group_source_req {
158 __u32 gsr_interface; /* interface index */
159 struct __kernel_sockaddr_storage gsr_group; /* group address */
160 struct __kernel_sockaddr_storage gsr_source; /* source address */
161};
162
163struct group_filter {
164 __u32 gf_interface; /* interface index */
165 struct __kernel_sockaddr_storage gf_group; /* multicast address */
166 __u32 gf_fmode; /* filter mode */
167 __u32 gf_numsrc; /* number of sources */
168 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
169};
170
171#define GROUP_FILTER_SIZE(numsrc) \
172 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
173 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
174
175struct in_pktinfo {
176 int ipi_ifindex;
177 struct in_addr ipi_spec_dst;
178 struct in_addr ipi_addr;
179};
180
181/* Structure describing an Internet (IP) socket address. */
182#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
183struct sockaddr_in {
184 sa_family_t sin_family; /* Address family */
185 __be16 sin_port; /* Port number */
186 struct in_addr sin_addr; /* Internet address */
187
188 /* Pad to size of `struct sockaddr'. */
189 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
190 sizeof(unsigned short int) - sizeof(struct in_addr)];
191};
192#define sin_zero __pad /* for BSD UNIX comp. -FvK */
193
194
195/*
196 * Definitions of the bits in an Internet address integer.
197 * On subnets, host and network parts are found according
198 * to the subnet mask, not these masks.
199 */
200#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
201#define IN_CLASSA_NET 0xff000000
202#define IN_CLASSA_NSHIFT 24
203#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
204#define IN_CLASSA_MAX 128
205
206#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
207#define IN_CLASSB_NET 0xffff0000
208#define IN_CLASSB_NSHIFT 16
209#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
210#define IN_CLASSB_MAX 65536
211
212#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
213#define IN_CLASSC_NET 0xffffff00
214#define IN_CLASSC_NSHIFT 8
215#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
216
217#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
218#define IN_MULTICAST(a) IN_CLASSD(a)
219#define IN_MULTICAST_NET 0xF0000000
220
221#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
222#define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
223
224/* Address to accept any incoming messages. */
225#define INADDR_ANY ((unsigned long int) 0x00000000)
226
227/* Address to send to all hosts. */
228#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
229
230/* Address indicating an error return. */
231#define INADDR_NONE ((unsigned long int) 0xffffffff)
232
233/* Network number for local host loopback. */
234#define IN_LOOPBACKNET 127
235
236/* Address to loopback in software to local host. */
237#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
238#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
239
240/* Defines for Multicast INADDR */
241#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
242#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
243#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
244#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
245
246
247/* <asm/byteorder.h> contains the htonl type stuff.. */
248#include <asm/byteorder.h>
249
250#ifdef __KERNEL__
251
252static inline bool ipv4_is_loopback(__be32 addr)
253{
254 return (addr & htonl(0xff000000)) == htonl(0x7f000000);
255}
256
257static inline bool ipv4_is_multicast(__be32 addr)
258{
259 return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
260}
261
262static inline bool ipv4_is_local_multicast(__be32 addr)
263{
264 return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
265}
266
267static inline bool ipv4_is_lbcast(__be32 addr)
268{
269 /* limited broadcast */
270 return addr == htonl(INADDR_BROADCAST);
271}
272
273static inline bool ipv4_is_zeronet(__be32 addr)
274{
275 return (addr & htonl(0xff000000)) == htonl(0x00000000);
276}
277
278/* Special-Use IPv4 Addresses (RFC3330) */
279
280static inline bool ipv4_is_private_10(__be32 addr)
281{
282 return (addr & htonl(0xff000000)) == htonl(0x0a000000);
283}
284
285static inline bool ipv4_is_private_172(__be32 addr)
286{
287 return (addr & htonl(0xfff00000)) == htonl(0xac100000);
288}
289
290static inline bool ipv4_is_private_192(__be32 addr)
291{
292 return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
293}
294
295static inline bool ipv4_is_linklocal_169(__be32 addr)
296{
297 return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
298}
299
300static inline bool ipv4_is_anycast_6to4(__be32 addr)
301{
302 return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
303}
304
305static inline bool ipv4_is_test_192(__be32 addr)
306{
307 return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
308}
309
310static inline bool ipv4_is_test_198(__be32 addr)
311{
312 return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
313}
314#endif
315
316#endif /* _LINUX_IN_H */