projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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, <[email protected]> | |
| 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) | |
| 11a03f78 | 60 | #define IPOPT_CIPSO (6 |IPOPT_CONTROL|IPOPT_COPY) |
| 1da177e4 LT |
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 | #define IPOPT_OPTVAL 0 | |
| 71 | #define IPOPT_OLEN 1 | |
| 72 | #define IPOPT_OFFSET 2 | |
| 73 | #define IPOPT_MINOFF 4 | |
| 74 | #define MAX_IPOPTLEN 40 | |
| 75 | #define IPOPT_NOP IPOPT_NOOP | |
| 76 | #define IPOPT_EOL IPOPT_END | |
| 77 | #define IPOPT_TS IPOPT_TIMESTAMP | |
| 78 | ||
| 79 | #define IPOPT_TS_TSONLY 0 /* timestamps only */ | |
| 80 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ | |
| 81 | #define IPOPT_TS_PRESPEC 3 /* specified modules only */ | |
| 82 | ||
| 0a69452c DB |
83 | #define IPV4_BEET_PHMAXLEN 8 |
| 84 | ||
| 1da177e4 LT |
85 | struct iphdr { |
| 86 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
| 87 | __u8 ihl:4, | |
| 88 | version:4; | |
| 89 | #elif defined (__BIG_ENDIAN_BITFIELD) | |
| 90 | __u8 version:4, | |
| 91 | ihl:4; | |
| 92 | #else | |
| 93 | #error "Please fix <asm/byteorder.h>" | |
| 94 | #endif | |
| 95 | __u8 tos; | |
| 76ab608d AD |
96 | __be16 tot_len; |
| 97 | __be16 id; | |
| 98 | __be16 frag_off; | |
| 1da177e4 LT |
99 | __u8 ttl; |
| 100 | __u8 protocol; | |
| 9981a0e3 | 101 | __sum16 check; |
| 76ab608d AD |
102 | __be32 saddr; |
| 103 | __be32 daddr; | |
| 1da177e4 LT |
104 | /*The options start here. */ |
| 105 | }; | |
| 106 | ||
| eddc9ec5 ACM |
107 | #ifdef __KERNEL__ |
| 108 | #include <linux/skbuff.h> | |
| 109 | ||
| 110 | static inline struct iphdr *ip_hdr(const struct sk_buff *skb) | |
| 111 | { | |
| 112 | return (struct iphdr *)skb_network_header(skb); | |
| 113 | } | |
| b0061ce4 ACM |
114 | |
| 115 | static inline struct iphdr *ipip_hdr(const struct sk_buff *skb) | |
| 116 | { | |
| 9c70220b | 117 | return (struct iphdr *)skb_transport_header(skb); |
| b0061ce4 | 118 | } |
| eddc9ec5 ACM |
119 | #endif |
| 120 | ||
| 1da177e4 LT |
121 | struct ip_auth_hdr { |
| 122 | __u8 nexthdr; | |
| 123 | __u8 hdrlen; /* This one is measured in 32 bit units! */ | |
| 046d0331 AV |
124 | __be16 reserved; |
| 125 | __be32 spi; | |
| 126 | __be32 seq_no; /* Sequence number */ | |
| 1da177e4 LT |
127 | __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ |
| 128 | }; | |
| 129 | ||
| 130 | struct ip_esp_hdr { | |
| 046d0331 AV |
131 | __be32 spi; |
| 132 | __be32 seq_no; /* Sequence number */ | |
| 1da177e4 LT |
133 | __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ |
| 134 | }; | |
| 135 | ||
| 136 | struct ip_comp_hdr { | |
| 137 | __u8 nexthdr; | |
| 138 | __u8 flags; | |
| 046d0331 | 139 | __be16 cpi; |
| 1da177e4 LT |
140 | }; |
| 141 | ||
| 0a69452c DB |
142 | struct ip_beet_phdr { |
| 143 | __u8 nexthdr; | |
| 144 | __u8 hdrlen; | |
| 145 | __u8 padlen; | |
| 146 | __u8 reserved; | |
| 147 | }; | |
| 148 | ||
| 1da177e4 | 149 | #endif /* _LINUX_IP_H */ |