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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 for the IP protocol. | |
7 | * | |
8 | * Version: @(#)ip.h 1.0.2 04/28/93 | |
9 | * | |
10 | * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | */ | |
17 | #ifndef _LINUX_IP_H | |
18 | #define _LINUX_IP_H | |
14c85021 | 19 | #include <linux/types.h> |
1da177e4 LT |
20 | #include <asm/byteorder.h> |
21 | ||
22 | #define IPTOS_TOS_MASK 0x1E | |
23 | #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK) | |
24 | #define IPTOS_LOWDELAY 0x10 | |
25 | #define IPTOS_THROUGHPUT 0x08 | |
26 | #define IPTOS_RELIABILITY 0x04 | |
27 | #define IPTOS_MINCOST 0x02 | |
28 | ||
29 | #define IPTOS_PREC_MASK 0xE0 | |
30 | #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK) | |
31 | #define IPTOS_PREC_NETCONTROL 0xe0 | |
32 | #define IPTOS_PREC_INTERNETCONTROL 0xc0 | |
33 | #define IPTOS_PREC_CRITIC_ECP 0xa0 | |
34 | #define IPTOS_PREC_FLASHOVERRIDE 0x80 | |
35 | #define IPTOS_PREC_FLASH 0x60 | |
36 | #define IPTOS_PREC_IMMEDIATE 0x40 | |
37 | #define IPTOS_PREC_PRIORITY 0x20 | |
38 | #define IPTOS_PREC_ROUTINE 0x00 | |
39 | ||
40 | ||
41 | /* IP options */ | |
42 | #define IPOPT_COPY 0x80 | |
43 | #define IPOPT_CLASS_MASK 0x60 | |
44 | #define IPOPT_NUMBER_MASK 0x1f | |
45 | ||
46 | #define IPOPT_COPIED(o) ((o)&IPOPT_COPY) | |
47 | #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK) | |
48 | #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK) | |
49 | ||
50 | #define IPOPT_CONTROL 0x00 | |
51 | #define IPOPT_RESERVED1 0x20 | |
52 | #define IPOPT_MEASUREMENT 0x40 | |
53 | #define IPOPT_RESERVED2 0x60 | |
54 | ||
55 | #define IPOPT_END (0 |IPOPT_CONTROL) | |
56 | #define IPOPT_NOOP (1 |IPOPT_CONTROL) | |
57 | #define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY) | |
58 | #define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY) | |
59 | #define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT) | |
60 | #define IPOPT_RR (7 |IPOPT_CONTROL) | |
61 | #define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY) | |
62 | #define IPOPT_SSRR (9 |IPOPT_CONTROL|IPOPT_COPY) | |
63 | #define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY) | |
64 | ||
65 | #define IPVERSION 4 | |
66 | #define MAXTTL 255 | |
67 | #define IPDEFTTL 64 | |
68 | ||
69 | #define IPOPT_OPTVAL 0 | |
70 | #define IPOPT_OLEN 1 | |
71 | #define IPOPT_OFFSET 2 | |
72 | #define IPOPT_MINOFF 4 | |
73 | #define MAX_IPOPTLEN 40 | |
74 | #define IPOPT_NOP IPOPT_NOOP | |
75 | #define IPOPT_EOL IPOPT_END | |
76 | #define IPOPT_TS IPOPT_TIMESTAMP | |
77 | ||
78 | #define IPOPT_TS_TSONLY 0 /* timestamps only */ | |
79 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ | |
80 | #define IPOPT_TS_PRESPEC 3 /* specified modules only */ | |
81 | ||
1da177e4 LT |
82 | struct iphdr { |
83 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
84 | __u8 ihl:4, | |
85 | version:4; | |
86 | #elif defined (__BIG_ENDIAN_BITFIELD) | |
87 | __u8 version:4, | |
88 | ihl:4; | |
89 | #else | |
90 | #error "Please fix <asm/byteorder.h>" | |
91 | #endif | |
92 | __u8 tos; | |
76ab608d AD |
93 | __be16 tot_len; |
94 | __be16 id; | |
95 | __be16 frag_off; | |
1da177e4 LT |
96 | __u8 ttl; |
97 | __u8 protocol; | |
98 | __u16 check; | |
76ab608d AD |
99 | __be32 saddr; |
100 | __be32 daddr; | |
1da177e4 LT |
101 | /*The options start here. */ |
102 | }; | |
103 | ||
104 | struct ip_auth_hdr { | |
105 | __u8 nexthdr; | |
106 | __u8 hdrlen; /* This one is measured in 32 bit units! */ | |
107 | __u16 reserved; | |
108 | __u32 spi; | |
109 | __u32 seq_no; /* Sequence number */ | |
110 | __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ | |
111 | }; | |
112 | ||
113 | struct ip_esp_hdr { | |
114 | __u32 spi; | |
115 | __u32 seq_no; /* Sequence number */ | |
116 | __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ | |
117 | }; | |
118 | ||
119 | struct ip_comp_hdr { | |
120 | __u8 nexthdr; | |
121 | __u8 flags; | |
122 | __u16 cpi; | |
123 | }; | |
124 | ||
125 | #endif /* _LINUX_IP_H */ |