Line data Source code
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. */
25 : enum {
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. */
56 : struct 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 : /* IP_MTU_DISCOVER values */
88 : #define IP_PMTUDISC_DONT 0 /* Never send DF frames */
89 : #define IP_PMTUDISC_WANT 1 /* Use per route hints */
90 : #define IP_PMTUDISC_DO 2 /* Always DF */
91 : #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
92 :
93 : #define IP_MULTICAST_IF 32
94 : #define IP_MULTICAST_TTL 33
95 : #define IP_MULTICAST_LOOP 34
96 : #define IP_ADD_MEMBERSHIP 35
97 : #define IP_DROP_MEMBERSHIP 36
98 : #define IP_UNBLOCK_SOURCE 37
99 : #define IP_BLOCK_SOURCE 38
100 : #define IP_ADD_SOURCE_MEMBERSHIP 39
101 : #define IP_DROP_SOURCE_MEMBERSHIP 40
102 : #define IP_MSFILTER 41
103 : #define MCAST_JOIN_GROUP 42
104 : #define MCAST_BLOCK_SOURCE 43
105 : #define MCAST_UNBLOCK_SOURCE 44
106 : #define MCAST_LEAVE_GROUP 45
107 : #define MCAST_JOIN_SOURCE_GROUP 46
108 : #define MCAST_LEAVE_SOURCE_GROUP 47
109 : #define MCAST_MSFILTER 48
110 : #define IP_MULTICAST_ALL 49
111 :
112 : #define MCAST_EXCLUDE 0
113 : #define MCAST_INCLUDE 1
114 :
115 : /* These need to appear somewhere around here */
116 : #define IP_DEFAULT_MULTICAST_TTL 1
117 : #define IP_DEFAULT_MULTICAST_LOOP 1
118 :
119 : /* Request struct for multicast socket ops */
120 :
121 : struct ip_mreq {
122 : struct in_addr imr_multiaddr; /* IP multicast address of group */
123 : struct in_addr imr_interface; /* local IP address of interface */
124 : };
125 :
126 : struct ip_mreqn {
127 : struct in_addr imr_multiaddr; /* IP multicast address of group */
128 : struct in_addr imr_address; /* local IP address of interface */
129 : int imr_ifindex; /* Interface index */
130 : };
131 :
132 : struct ip_mreq_source {
133 : __be32 imr_multiaddr;
134 : __be32 imr_interface;
135 : __be32 imr_sourceaddr;
136 : };
137 :
138 : struct ip_msfilter {
139 : __be32 imsf_multiaddr;
140 : __be32 imsf_interface;
141 : __u32 imsf_fmode;
142 : __u32 imsf_numsrc;
143 : __be32 imsf_slist[1];
144 : };
145 :
146 : #define IP_MSFILTER_SIZE(numsrc) \
147 : (sizeof(struct ip_msfilter) - sizeof(__u32) \
148 : + (numsrc) * sizeof(__u32))
149 :
150 : struct group_req {
151 : __u32 gr_interface; /* interface index */
152 : struct __kernel_sockaddr_storage gr_group; /* group address */
153 : };
154 :
155 : struct group_source_req {
156 : __u32 gsr_interface; /* interface index */
157 : struct __kernel_sockaddr_storage gsr_group; /* group address */
158 : struct __kernel_sockaddr_storage gsr_source; /* source address */
159 : };
160 :
161 : struct group_filter {
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 :
173 : struct in_pktinfo {
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) */
181 : struct sockaddr_in {
182 : sa_family_t sin_family; /* Address family */
183 : __be16 sin_port; /* Port number */
184 : 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__
249 :
250 : static inline bool ipv4_is_loopback(__be32 addr)
251 : {
252 : return (addr & htonl(0xff000000)) == htonl(0x7f000000);
253 : }
254 :
255 : static inline bool ipv4_is_multicast(__be32 addr)
256 : {
257 : return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
258 : }
259 :
260 : static inline bool ipv4_is_local_multicast(__be32 addr)
261 : {
262 : return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
263 : }
264 :
265 : static inline bool ipv4_is_lbcast(__be32 addr)
266 : {
267 : /* limited broadcast */
268 : return addr == htonl(INADDR_BROADCAST);
269 : }
270 :
271 : static inline bool ipv4_is_zeronet(__be32 addr)
272 : {
273 : return (addr & htonl(0xff000000)) == htonl(0x00000000);
274 : }
275 :
276 : /* Special-Use IPv4 Addresses (RFC3330) */
277 :
278 : static inline bool ipv4_is_private_10(__be32 addr)
279 : {
280 : return (addr & htonl(0xff000000)) == htonl(0x0a000000);
281 : }
282 :
283 : static inline bool ipv4_is_private_172(__be32 addr)
284 : {
285 : return (addr & htonl(0xfff00000)) == htonl(0xac100000);
286 : }
287 :
288 : static inline bool ipv4_is_private_192(__be32 addr)
289 : {
290 : return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
291 : }
292 :
293 : static inline bool ipv4_is_linklocal_169(__be32 addr)
294 : {
295 : return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
296 : }
297 :
298 : static inline bool ipv4_is_anycast_6to4(__be32 addr)
299 : {
300 : return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
301 : }
302 :
303 : static inline bool ipv4_is_test_192(__be32 addr)
304 : {
305 : return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
306 : }
307 :
308 : static inline bool ipv4_is_test_198(__be32 addr)
309 : {
310 : return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
311 : }
312 2 : #endif
313 :
314 : #endif /* _LINUX_IN_H */
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