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1da177e4 LT |
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 */ | |
7c657876 | 35 | IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */ |
1da177e4 LT |
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 */ | |
0a69452c | 43 | IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */ |
1da177e4 LT |
44 | IPPROTO_PIM = 103, /* Protocol Independent Multicast */ |
45 | ||
46 | IPPROTO_COMP = 108, /* Compression Header protocol */ | |
47 | IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */ | |
ba4e58ec | 48 | IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */ |
1da177e4 LT |
49 | |
50 | IPPROTO_RAW = 255, /* Raw IP packets */ | |
51 | IPPROTO_MAX | |
52 | }; | |
53 | ||
54 | ||
55 | /* Internet address. */ | |
56 | struct in_addr { | |
def42ff4 | 57 | __be32 s_addr; |
1da177e4 LT |
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 | |
2c7946a7 | 77 | #define IP_PASSSEC 18 |
f5715aea | 78 | #define IP_TRANSPARENT 19 |
1da177e4 LT |
79 | |
80 | /* BSD compatibility */ | |
81 | #define IP_RECVRETOPTS IP_RETOPTS | |
82 | ||
e8b2dfe9 BS |
83 | /* TProxy original addresses */ |
84 | #define IP_ORIGDSTADDR 20 | |
85 | #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR | |
86 | ||
1da177e4 LT |
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 */ | |
628a5c56 | 91 | #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */ |
1da177e4 LT |
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 | |
f771bef9 | 110 | #define IP_MULTICAST_ALL 49 |
1da177e4 LT |
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 | { | |
123 | struct in_addr imr_multiaddr; /* IP multicast address of group */ | |
124 | struct in_addr imr_interface; /* local IP address of interface */ | |
125 | }; | |
126 | ||
127 | struct ip_mreqn | |
128 | { | |
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 | ||
134 | struct ip_mreq_source { | |
00a5020c AV |
135 | __be32 imr_multiaddr; |
136 | __be32 imr_interface; | |
137 | __be32 imr_sourceaddr; | |
1da177e4 LT |
138 | }; |
139 | ||
140 | struct ip_msfilter { | |
00a5020c AV |
141 | __be32 imsf_multiaddr; |
142 | __be32 imsf_interface; | |
1da177e4 LT |
143 | __u32 imsf_fmode; |
144 | __u32 imsf_numsrc; | |
00a5020c | 145 | __be32 imsf_slist[1]; |
1da177e4 LT |
146 | }; |
147 | ||
148 | #define IP_MSFILTER_SIZE(numsrc) \ | |
149 | (sizeof(struct ip_msfilter) - sizeof(__u32) \ | |
150 | + (numsrc) * sizeof(__u32)) | |
151 | ||
152 | struct group_req | |
153 | { | |
154 | __u32 gr_interface; /* interface index */ | |
155 | struct __kernel_sockaddr_storage gr_group; /* group address */ | |
156 | }; | |
157 | ||
158 | struct group_source_req | |
159 | { | |
160 | __u32 gsr_interface; /* interface index */ | |
161 | struct __kernel_sockaddr_storage gsr_group; /* group address */ | |
162 | struct __kernel_sockaddr_storage gsr_source; /* source address */ | |
163 | }; | |
164 | ||
165 | struct group_filter | |
166 | { | |
167 | __u32 gf_interface; /* interface index */ | |
168 | struct __kernel_sockaddr_storage gf_group; /* multicast address */ | |
169 | __u32 gf_fmode; /* filter mode */ | |
170 | __u32 gf_numsrc; /* number of sources */ | |
171 | struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ | |
172 | }; | |
173 | ||
174 | #define GROUP_FILTER_SIZE(numsrc) \ | |
175 | (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ | |
176 | + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) | |
177 | ||
178 | struct in_pktinfo | |
179 | { | |
180 | int ipi_ifindex; | |
181 | struct in_addr ipi_spec_dst; | |
182 | struct in_addr ipi_addr; | |
183 | }; | |
184 | ||
185 | /* Structure describing an Internet (IP) socket address. */ | |
186 | #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ | |
187 | struct sockaddr_in { | |
188 | sa_family_t sin_family; /* Address family */ | |
cd360007 | 189 | __be16 sin_port; /* Port number */ |
1da177e4 LT |
190 | struct in_addr sin_addr; /* Internet address */ |
191 | ||
192 | /* Pad to size of `struct sockaddr'. */ | |
193 | unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - | |
194 | sizeof(unsigned short int) - sizeof(struct in_addr)]; | |
195 | }; | |
196 | #define sin_zero __pad /* for BSD UNIX comp. -FvK */ | |
197 | ||
198 | ||
199 | /* | |
200 | * Definitions of the bits in an Internet address integer. | |
201 | * On subnets, host and network parts are found according | |
202 | * to the subnet mask, not these masks. | |
203 | */ | |
204 | #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) | |
205 | #define IN_CLASSA_NET 0xff000000 | |
206 | #define IN_CLASSA_NSHIFT 24 | |
207 | #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) | |
208 | #define IN_CLASSA_MAX 128 | |
209 | ||
210 | #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) | |
211 | #define IN_CLASSB_NET 0xffff0000 | |
212 | #define IN_CLASSB_NSHIFT 16 | |
213 | #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) | |
214 | #define IN_CLASSB_MAX 65536 | |
215 | ||
216 | #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) | |
217 | #define IN_CLASSC_NET 0xffffff00 | |
218 | #define IN_CLASSC_NSHIFT 8 | |
219 | #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) | |
220 | ||
221 | #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) | |
222 | #define IN_MULTICAST(a) IN_CLASSD(a) | |
223 | #define IN_MULTICAST_NET 0xF0000000 | |
224 | ||
225 | #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) | |
226 | #define IN_BADCLASS(a) IN_EXPERIMENTAL((a)) | |
227 | ||
228 | /* Address to accept any incoming messages. */ | |
229 | #define INADDR_ANY ((unsigned long int) 0x00000000) | |
230 | ||
231 | /* Address to send to all hosts. */ | |
232 | #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) | |
233 | ||
234 | /* Address indicating an error return. */ | |
235 | #define INADDR_NONE ((unsigned long int) 0xffffffff) | |
236 | ||
237 | /* Network number for local host loopback. */ | |
238 | #define IN_LOOPBACKNET 127 | |
239 | ||
240 | /* Address to loopback in software to local host. */ | |
241 | #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ | |
242 | #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) | |
243 | ||
244 | /* Defines for Multicast INADDR */ | |
245 | #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ | |
246 | #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ | |
247 | #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ | |
248 | #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ | |
249 | ||
250 | ||
251 | /* <asm/byteorder.h> contains the htonl type stuff.. */ | |
252 | #include <asm/byteorder.h> | |
253 | ||
254 | #ifdef __KERNEL__ | |
2658fa80 JP |
255 | |
256 | static inline bool ipv4_is_loopback(__be32 addr) | |
257 | { | |
258 | return (addr & htonl(0xff000000)) == htonl(0x7f000000); | |
259 | } | |
260 | ||
261 | static inline bool ipv4_is_multicast(__be32 addr) | |
262 | { | |
263 | return (addr & htonl(0xf0000000)) == htonl(0xe0000000); | |
264 | } | |
265 | ||
266 | static inline bool ipv4_is_local_multicast(__be32 addr) | |
267 | { | |
268 | return (addr & htonl(0xffffff00)) == htonl(0xe0000000); | |
269 | } | |
270 | ||
1e637c74 | 271 | static inline bool ipv4_is_lbcast(__be32 addr) |
2658fa80 | 272 | { |
1e637c74 | 273 | /* limited broadcast */ |
0ff9663c | 274 | return addr == htonl(INADDR_BROADCAST); |
2658fa80 JP |
275 | } |
276 | ||
277 | static inline bool ipv4_is_zeronet(__be32 addr) | |
278 | { | |
279 | return (addr & htonl(0xff000000)) == htonl(0x00000000); | |
280 | } | |
281 | ||
c7dc89c0 | 282 | /* Special-Use IPv4 Addresses (RFC3330) */ |
2658fa80 JP |
283 | |
284 | static inline bool ipv4_is_private_10(__be32 addr) | |
285 | { | |
286 | return (addr & htonl(0xff000000)) == htonl(0x0a000000); | |
287 | } | |
288 | ||
289 | static inline bool ipv4_is_private_172(__be32 addr) | |
290 | { | |
291 | return (addr & htonl(0xfff00000)) == htonl(0xac100000); | |
292 | } | |
293 | ||
294 | static inline bool ipv4_is_private_192(__be32 addr) | |
295 | { | |
296 | return (addr & htonl(0xffff0000)) == htonl(0xc0a80000); | |
297 | } | |
298 | ||
299 | static inline bool ipv4_is_linklocal_169(__be32 addr) | |
300 | { | |
301 | return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000); | |
302 | } | |
303 | ||
304 | static inline bool ipv4_is_anycast_6to4(__be32 addr) | |
305 | { | |
306 | return (addr & htonl(0xffffff00)) == htonl(0xc0586300); | |
307 | } | |
308 | ||
309 | static inline bool ipv4_is_test_192(__be32 addr) | |
310 | { | |
311 | return (addr & htonl(0xffffff00)) == htonl(0xc0000200); | |
312 | } | |
313 | ||
314 | static inline bool ipv4_is_test_198(__be32 addr) | |
315 | { | |
316 | return (addr & htonl(0xfffe0000)) == htonl(0xc6120000); | |
317 | } | |
1da177e4 LT |
318 | #endif |
319 | ||
320 | #endif /* _LINUX_IN_H */ |