| 1 | /* |
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| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
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| 3 | * operating system. INET is implemented using the BSD Socket |
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| 4 | * interface as the means of communication with the user level. |
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| 5 | * |
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| 6 | * Definitions for the IP protocol. |
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| 7 | * |
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| 8 | * Version: @(#)ip.h 1.0.2 04/28/93 |
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| 9 | * |
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| 10 | * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
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| 11 | * |
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| 12 | * This program is free software; you can redistribute it and/or |
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| 13 | * modify it under the terms of the GNU General Public License |
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| 14 | * as published by the Free Software Foundation; either version |
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| 15 | * 2 of the License, or (at your option) any later version. |
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| 16 | */ |
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| 17 | #ifndef _LINUX_IP_H |
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| 18 | #define _LINUX_IP_H |
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| 19 | #include <asm/types.h> |
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| 20 | #include <endian.h> |
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| 21 | #include <byteswap.h> |
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| 22 | |
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| 23 | #define IPTOS_TOS_MASK 0x1E |
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| 24 | #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK) |
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| 25 | #define IPTOS_LOWDELAY 0x10 |
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| 26 | #define IPTOS_THROUGHPUT 0x08 |
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| 27 | #define IPTOS_RELIABILITY 0x04 |
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| 28 | #define IPTOS_MINCOST 0x02 |
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| 29 | |
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| 30 | #define IPTOS_PREC_MASK 0xE0 |
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| 31 | #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK) |
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| 32 | #define IPTOS_PREC_NETCONTROL 0xe0 |
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| 33 | #define IPTOS_PREC_INTERNETCONTROL 0xc0 |
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| 34 | #define IPTOS_PREC_CRITIC_ECP 0xa0 |
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| 35 | #define IPTOS_PREC_FLASHOVERRIDE 0x80 |
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| 36 | #define IPTOS_PREC_FLASH 0x60 |
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| 37 | #define IPTOS_PREC_IMMEDIATE 0x40 |
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| 38 | #define IPTOS_PREC_PRIORITY 0x20 |
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| 39 | #define IPTOS_PREC_ROUTINE 0x00 |
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| 40 | |
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| 41 | |
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| 42 | /* IP options */ |
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| 43 | #define IPOPT_COPY 0x80 |
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| 44 | #define IPOPT_CLASS_MASK 0x60 |
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| 45 | #define IPOPT_NUMBER_MASK 0x1f |
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| 46 | |
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| 47 | #define IPOPT_COPIED(o) ((o)&IPOPT_COPY) |
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| 48 | #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK) |
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| 49 | #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK) |
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| 50 | |
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| 51 | #define IPOPT_CONTROL 0x00 |
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| 52 | #define IPOPT_RESERVED1 0x20 |
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| 53 | #define IPOPT_MEASUREMENT 0x40 |
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| 54 | #define IPOPT_RESERVED2 0x60 |
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| 55 | |
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| 56 | #define IPOPT_END (0 |IPOPT_CONTROL) |
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| 57 | #define IPOPT_NOOP (1 |IPOPT_CONTROL) |
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| 58 | #define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY) |
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| 59 | #define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY) |
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| 60 | #define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT) |
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| 61 | #define IPOPT_RR (7 |IPOPT_CONTROL) |
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| 62 | #define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY) |
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| 63 | #define IPOPT_SSRR (9 |IPOPT_CONTROL|IPOPT_COPY) |
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| 64 | #define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY) |
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| 65 | |
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| 66 | #define IPVERSION 4 |
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| 67 | #define MAXTTL 255 |
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| 68 | #define IPDEFTTL 64 |
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| 69 | |
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| 70 | #define IPOPT_OPTVAL 0 |
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| 71 | #define IPOPT_OLEN 1 |
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| 72 | #define IPOPT_OFFSET 2 |
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| 73 | #define IPOPT_MINOFF 4 |
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| 74 | #define MAX_IPOPTLEN 40 |
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| 75 | #define IPOPT_NOP IPOPT_NOOP |
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| 76 | #define IPOPT_EOL IPOPT_END |
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| 77 | #define IPOPT_TS IPOPT_TIMESTAMP |
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| 78 | |
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| 79 | #define IPOPT_TS_TSONLY 0 /* timestamps only */ |
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| 80 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ |
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| 81 | #define IPOPT_TS_PRESPEC 3 /* specified modules only */ |
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| 82 | |
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| 83 | #ifndef __NETINET_IP_H |
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| 84 | |
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| 85 | struct iphdr { |
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| 86 | #if defined(__LITTLE_ENDIAN) |
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| 87 | __u8 ihl:4, |
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| 88 | version:4; |
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| 89 | #elif defined (__BIG_ENDIAN) |
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| 90 | __u8 version:4, |
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| 91 | ihl:4; |
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| 92 | #else |
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| 93 | #error "Endian problem - this didn't happen" |
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| 94 | #endif |
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| 95 | __u8 tos; |
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| 96 | __u16 tot_len; |
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| 97 | __u16 id; |
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| 98 | __u16 frag_off; |
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| 99 | __u8 ttl; |
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| 100 | __u8 protocol; |
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| 101 | __u16 check; |
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| 102 | __u32 saddr; |
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| 103 | __u32 daddr; |
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| 104 | /*The options start here. */ |
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| 105 | }; |
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| 106 | |
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| 107 | #endif |
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| 108 | |
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| 109 | struct ip_auth_hdr { |
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| 110 | __u8 nexthdr; |
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| 111 | __u8 hdrlen; /* This one is measured in 32 bit units! */ |
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| 112 | __u16 reserved; |
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| 113 | __u32 spi; |
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| 114 | __u32 seq_no; /* Sequence number */ |
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| 115 | __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ |
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| 116 | }; |
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| 117 | |
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| 118 | struct ip_esp_hdr { |
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| 119 | __u32 spi; |
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| 120 | __u32 seq_no; /* Sequence number */ |
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| 121 | __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ |
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| 122 | }; |
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| 123 | |
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| 124 | struct ip_comp_hdr { |
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| 125 | __u8 nexthdr; |
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| 126 | __u8 flags; |
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| 127 | __u16 cpi; |
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| 128 | }; |
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| 129 | |
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| 130 | #endif /* _LINUX_IP_H */ |
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