projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2865d42c LF |
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 | |
| 19 | ||
| 20 | #include "rtl871x_byteorder.h" | |
| 21 | ||
| 22 | /* SOL_IP socket options */ | |
| 23 | ||
| 24 | #define IPTOS_TOS_MASK 0x1E | |
| 25 | #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK) | |
| 26 | #define IPTOS_LOWDELAY 0x10 | |
| 27 | #define IPTOS_THROUGHPUT 0x08 | |
| 28 | #define IPTOS_RELIABILITY 0x04 | |
| 29 | #define IPTOS_MINCOST 0x02 | |
| 30 | ||
| 31 | #define IPTOS_PREC_MASK 0xE0 | |
| 32 | #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK) | |
| 33 | #define IPTOS_PREC_NETCONTROL 0xe0 | |
| 34 | #define IPTOS_PREC_INTERNETCONTROL 0xc0 | |
| 35 | #define IPTOS_PREC_CRITIC_ECP 0xa0 | |
| 36 | #define IPTOS_PREC_FLASHOVERRIDE 0x80 | |
| 37 | #define IPTOS_PREC_FLASH 0x60 | |
| 38 | #define IPTOS_PREC_IMMEDIATE 0x40 | |
| 39 | #define IPTOS_PREC_PRIORITY 0x20 | |
| 40 | #define IPTOS_PREC_ROUTINE 0x00 | |
| 41 | ||
| 42 | /* IP options */ | |
| 43 | #define IPOPT_COPY 0x80 | |
| 44 | #define IPOPT_CLASS_MASK 0x60 | |
| 45 | #define IPOPT_NUMBER_MASK 0x1f | |
| 46 | ||
| 47 | #define IPOPT_COPIED(o) ((o)&IPOPT_COPY) | |
| 48 | #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK) | |
| 49 | #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK) | |
| 50 | ||
| 51 | #define IPOPT_CONTROL 0x00 | |
| 52 | #define IPOPT_RESERVED1 0x20 | |
| 53 | #define IPOPT_MEASUREMENT 0x40 | |
| 54 | #define IPOPT_RESERVED2 0x60 | |
| 55 | ||
| 56 | #define IPOPT_END (0 | IPOPT_CONTROL) | |
| 57 | #define IPOPT_NOOP (1 | IPOPT_CONTROL) | |
| 58 | #define IPOPT_SEC (2 | IPOPT_CONTROL|IPOPT_COPY) | |
| 59 | #define IPOPT_LSRR (3 | IPOPT_CONTROL|IPOPT_COPY) | |
| 60 | #define IPOPT_TIMESTAMP (4 | IPOPT_MEASUREMENT) | |
| 61 | #define IPOPT_RR (7 | IPOPT_CONTROL) | |
| 62 | #define IPOPT_SID (8 | IPOPT_CONTROL | IPOPT_COPY) | |
| 63 | #define IPOPT_SSRR (9 | IPOPT_CONTROL | IPOPT_COPY) | |
| 64 | #define IPOPT_RA (20 | IPOPT_CONTROL | IPOPT_COPY) | |
| 65 | ||
| 66 | #define IPVERSION 4 | |
| 67 | #define MAXTTL 255 | |
| 68 | #define IPDEFTTL 64 | |
| 69 | ||
| 70 | /* struct timestamp, struct route and MAX_ROUTES are removed. | |
| 71 | * | |
| 72 | * REASONS: it is clear that nobody used them because: | |
| 73 | * - MAX_ROUTES value was wrong. | |
| 74 | * - "struct route" was wrong. | |
| 75 | * - "struct timestamp" had fatally misaligned bitfields and was completely | |
| 76 | * unusable. | |
| 77 | */ | |
| 78 | ||
| 79 | #define IPOPT_OPTVAL 0 | |
| 80 | #define IPOPT_OLEN 1 | |
| 81 | #define IPOPT_OFFSET 2 | |
| 82 | #define IPOPT_MINOFF 4 | |
| 83 | #define MAX_IPOPTLEN 40 | |
| 84 | #define IPOPT_NOP IPOPT_NOOP | |
| 85 | #define IPOPT_EOL IPOPT_END | |
| 86 | #define IPOPT_TS IPOPT_TIMESTAMP | |
| 87 | ||
| 88 | #define IPOPT_TS_TSONLY 0 /* timestamps only */ | |
| 89 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ | |
| 90 | #define IPOPT_TS_PRESPEC 3 /* specified modules only */ | |
| 91 | ||
| 92 | struct ip_options { | |
| 0593758e JM |
93 | __u32 faddr; /* Saved first hop address */ |
| 94 | unsigned char optlen; | |
| 95 | unsigned char srr; | |
| 96 | unsigned char rr; | |
| 97 | unsigned char ts; | |
| 98 | unsigned char is_setbyuser:1, /* Set by setsockopt? */ | |
| 99 | is_data:1, /* Options in __data, rather than skb */ | |
| 100 | is_strictroute:1, /* Strict source route */ | |
| 101 | srr_is_hit:1, /* Packet destination addr was our one*/ | |
| 102 | is_changed:1, /* IP checksum more not valid */ | |
| 103 | rr_needaddr:1, /* Need to record addr of outgoing dev*/ | |
| 104 | ts_needtime:1, /* Need to record timestamp */ | |
| 105 | ts_needaddr:1; /* Need to record addr of outgoing dev*/ | |
| 106 | unsigned char router_alert; | |
| 107 | unsigned char __pad1; | |
| 108 | unsigned char __pad2; | |
| 109 | unsigned char __data[0]; | |
| 2865d42c LF |
110 | }; |
| 111 | ||
| 112 | #define optlength(opt) (sizeof(struct ip_options) + opt->optlen) | |
| 113 | ||
| 114 | struct iphdr { | |
| 115 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
| 116 | __u8 ihl:4, | |
| 117 | version:4; | |
| 118 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
| 119 | __u8 version:4, | |
| 120 | ihl:4; | |
| 121 | #else | |
| 122 | #error "Please fix <asm/byteorder.h>" | |
| 123 | #endif | |
| 124 | __u8 tos; | |
| 125 | __u16 tot_len; | |
| 126 | __u16 id; | |
| 127 | __u16 frag_off; | |
| 128 | __u8 ttl; | |
| 129 | __u8 protocol; | |
| 130 | __u16 check; | |
| 131 | __u32 saddr; | |
| 132 | __u32 daddr; | |
| 133 | /*The options start here. */ | |
| 134 | }; | |
| 135 | ||
| 136 | #endif /* _LINUX_IP_H */ | |
| 137 |