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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. */ |
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 | #define IP_MINTTL 21 |
88 | #define IP_NODEFRAG 22 |
89 | |
90 | /* IP_MTU_DISCOVER values */ |
91 | #define IP_PMTUDISC_DONT 0 /* Never send DF frames */ |
92 | #define IP_PMTUDISC_WANT 1 /* Use per route hints */ |
93 | #define IP_PMTUDISC_DO 2 /* Always DF */ |
94 | #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */ |
95 | |
96 | #define IP_MULTICAST_IF 32 |
97 | #define IP_MULTICAST_TTL 33 |
98 | #define IP_MULTICAST_LOOP 34 |
99 | #define IP_ADD_MEMBERSHIP 35 |
100 | #define IP_DROP_MEMBERSHIP 36 |
101 | #define IP_UNBLOCK_SOURCE 37 |
102 | #define IP_BLOCK_SOURCE 38 |
103 | #define IP_ADD_SOURCE_MEMBERSHIP 39 |
104 | #define IP_DROP_SOURCE_MEMBERSHIP 40 |
105 | #define IP_MSFILTER 41 |
106 | #define MCAST_JOIN_GROUP 42 |
107 | #define MCAST_BLOCK_SOURCE 43 |
108 | #define MCAST_UNBLOCK_SOURCE 44 |
109 | #define MCAST_LEAVE_GROUP 45 |
110 | #define MCAST_JOIN_SOURCE_GROUP 46 |
111 | #define MCAST_LEAVE_SOURCE_GROUP 47 |
112 | #define MCAST_MSFILTER 48 |
113 | #define IP_MULTICAST_ALL 49 |
114 | |
115 | #define MCAST_EXCLUDE 0 |
116 | #define MCAST_INCLUDE 1 |
117 | |
118 | /* These need to appear somewhere around here */ |
119 | #define IP_DEFAULT_MULTICAST_TTL 1 |
120 | #define IP_DEFAULT_MULTICAST_LOOP 1 |
121 | |
122 | /* Request struct for multicast socket ops */ |
123 | |
124 | struct ip_mreq { |
125 | struct in_addr imr_multiaddr; /* IP multicast address of group */ |
126 | struct in_addr imr_interface; /* local IP address of interface */ |
127 | }; |
128 | |
129 | struct ip_mreqn { |
130 | struct in_addr imr_multiaddr; /* IP multicast address of group */ |
131 | struct in_addr imr_address; /* local IP address of interface */ |
132 | int imr_ifindex; /* Interface index */ |
133 | }; |
134 | |
135 | struct ip_mreq_source { |
136 | __be32 imr_multiaddr; |
137 | __be32 imr_interface; |
138 | __be32 imr_sourceaddr; |
139 | }; |
140 | |
141 | struct ip_msfilter { |
142 | __be32 imsf_multiaddr; |
143 | __be32 imsf_interface; |
144 | __u32 imsf_fmode; |
145 | __u32 imsf_numsrc; |
146 | __be32 imsf_slist[1]; |
147 | }; |
148 | |
149 | #define IP_MSFILTER_SIZE(numsrc) \ |
150 | (sizeof(struct ip_msfilter) - sizeof(__u32) \ |
151 | + (numsrc) * sizeof(__u32)) |
152 | |
153 | struct group_req { |
154 | __u32 gr_interface; /* interface index */ |
155 | struct __kernel_sockaddr_storage gr_group; /* group address */ |
156 | }; |
157 | |
158 | struct group_source_req { |
159 | __u32 gsr_interface; /* interface index */ |
160 | struct __kernel_sockaddr_storage gsr_group; /* group address */ |
161 | struct __kernel_sockaddr_storage gsr_source; /* source address */ |
162 | }; |
163 | |
164 | struct group_filter { |
165 | __u32 gf_interface; /* interface index */ |
166 | struct __kernel_sockaddr_storage gf_group; /* multicast address */ |
167 | __u32 gf_fmode; /* filter mode */ |
168 | __u32 gf_numsrc; /* number of sources */ |
169 | struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ |
170 | }; |
171 | |
172 | #define GROUP_FILTER_SIZE(numsrc) \ |
173 | (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ |
174 | + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) |
175 | |
176 | struct in_pktinfo { |
177 | int ipi_ifindex; |
178 | struct in_addr ipi_spec_dst; |
179 | struct in_addr ipi_addr; |
180 | }; |
181 | |
182 | /* Structure describing an Internet (IP) socket address. */ |
183 | #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ |
184 | struct sockaddr_in { |
185 | sa_family_t sin_family; /* Address family */ |
186 | __be16 sin_port; /* Port number */ |
187 | struct in_addr sin_addr; /* Internet address */ |
188 | |
189 | /* Pad to size of `struct sockaddr'. */ |
190 | unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - |
191 | sizeof(unsigned short int) - sizeof(struct in_addr)]; |
192 | }; |
193 | #define sin_zero __pad /* for BSD UNIX comp. -FvK */ |
194 | |
195 | |
196 | /* |
197 | * Definitions of the bits in an Internet address integer. |
198 | * On subnets, host and network parts are found according |
199 | * to the subnet mask, not these masks. |
200 | */ |
201 | #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) |
202 | #define IN_CLASSA_NET 0xff000000 |
203 | #define IN_CLASSA_NSHIFT 24 |
204 | #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) |
205 | #define IN_CLASSA_MAX 128 |
206 | |
207 | #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) |
208 | #define IN_CLASSB_NET 0xffff0000 |
209 | #define IN_CLASSB_NSHIFT 16 |
210 | #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) |
211 | #define IN_CLASSB_MAX 65536 |
212 | |
213 | #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) |
214 | #define IN_CLASSC_NET 0xffffff00 |
215 | #define IN_CLASSC_NSHIFT 8 |
216 | #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) |
217 | |
218 | #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) |
219 | #define IN_MULTICAST(a) IN_CLASSD(a) |
220 | #define IN_MULTICAST_NET 0xF0000000 |
221 | |
222 | #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) |
223 | #define IN_BADCLASS(a) IN_EXPERIMENTAL((a)) |
224 | |
225 | /* Address to accept any incoming messages. */ |
226 | #define INADDR_ANY ((unsigned long int) 0x00000000) |
227 | |
228 | /* Address to send to all hosts. */ |
229 | #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) |
230 | |
231 | /* Address indicating an error return. */ |
232 | #define INADDR_NONE ((unsigned long int) 0xffffffff) |
233 | |
234 | /* Network number for local host loopback. */ |
235 | #define IN_LOOPBACKNET 127 |
236 | |
237 | /* Address to loopback in software to local host. */ |
238 | #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ |
239 | #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) |
240 | |
241 | /* Defines for Multicast INADDR */ |
242 | #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ |
243 | #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ |
244 | #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ |
245 | #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ |
246 | |
247 | |
248 | /* <asm/byteorder.h> contains the htonl type stuff.. */ |
249 | #include <asm/byteorder.h> |
250 | |
251 | #ifdef __KERNEL__ |
252 | |
253 | #include <linux/errno.h> |
254 | |
255 | static inline int proto_ports_offset(int proto) |
256 | { |
257 | switch (proto) { |
258 | case IPPROTO_TCP: |
259 | case IPPROTO_UDP: |
260 | case IPPROTO_DCCP: |
261 | case IPPROTO_ESP: /* SPI */ |
262 | case IPPROTO_SCTP: |
263 | case IPPROTO_UDPLITE: |
264 | return 0; |
265 | case IPPROTO_AH: /* SPI */ |
266 | return 4; |
267 | default: |
268 | return -EINVAL; |
269 | } |
270 | } |
271 | |
272 | static inline bool ipv4_is_loopback(__be32 addr) |
273 | { |
274 | return (addr & htonl(0xff000000)) == htonl(0x7f000000); |
275 | } |
276 | |
277 | static inline bool ipv4_is_multicast(__be32 addr) |
278 | { |
279 | return (addr & htonl(0xf0000000)) == htonl(0xe0000000); |
280 | } |
281 | |
282 | static inline bool ipv4_is_local_multicast(__be32 addr) |
283 | { |
284 | return (addr & htonl(0xffffff00)) == htonl(0xe0000000); |
285 | } |
286 | |
287 | static inline bool ipv4_is_lbcast(__be32 addr) |
288 | { |
289 | /* limited broadcast */ |
290 | return addr == htonl(INADDR_BROADCAST); |
291 | } |
292 | |
293 | static inline bool ipv4_is_zeronet(__be32 addr) |
294 | { |
295 | return (addr & htonl(0xff000000)) == htonl(0x00000000); |
296 | } |
297 | |
298 | /* Special-Use IPv4 Addresses (RFC3330) */ |
299 | |
300 | static inline bool ipv4_is_private_10(__be32 addr) |
301 | { |
302 | return (addr & htonl(0xff000000)) == htonl(0x0a000000); |
303 | } |
304 | |
305 | static inline bool ipv4_is_private_172(__be32 addr) |
306 | { |
307 | return (addr & htonl(0xfff00000)) == htonl(0xac100000); |
308 | } |
309 | |
310 | static inline bool ipv4_is_private_192(__be32 addr) |
311 | { |
312 | return (addr & htonl(0xffff0000)) == htonl(0xc0a80000); |
313 | } |
314 | |
315 | static inline bool ipv4_is_linklocal_169(__be32 addr) |
316 | { |
317 | return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000); |
318 | } |
319 | |
320 | static inline bool ipv4_is_anycast_6to4(__be32 addr) |
321 | { |
322 | return (addr & htonl(0xffffff00)) == htonl(0xc0586300); |
323 | } |
324 | |
325 | static inline bool ipv4_is_test_192(__be32 addr) |
326 | { |
327 | return (addr & htonl(0xffffff00)) == htonl(0xc0000200); |
328 | } |
329 | |
330 | static inline bool ipv4_is_test_198(__be32 addr) |
331 | { |
332 | return (addr & htonl(0xfffe0000)) == htonl(0xc6120000); |
333 | } |
334 | #endif |
335 | |
336 | #endif /* _LINUX_IN_H */ |
337 |
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