| 1 | |
| 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, <[email protected]>
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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 <linux/types.h>
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| 20 | #include <asm/byteorder.h>
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| 21 |
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| 22 | #define IPTOS_TOS_MASK 0x1E
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| 23 | #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK)
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| 24 | #define IPTOS_LOWDELAY 0x10
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| 25 | #define IPTOS_THROUGHPUT 0x08
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| 26 | #define IPTOS_RELIABILITY 0x04
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| 27 | #define IPTOS_MINCOST 0x02
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| 28 |
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| 29 | #define IPTOS_PREC_MASK 0xE0
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| 30 | #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK)
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| 31 | #define IPTOS_PREC_NETCONTROL 0xe0
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| 32 | #define IPTOS_PREC_INTERNETCONTROL 0xc0
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| 33 | #define IPTOS_PREC_CRITIC_ECP 0xa0
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| 34 | #define IPTOS_PREC_FLASHOVERRIDE 0x80
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| 35 | #define IPTOS_PREC_FLASH 0x60
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| 36 | #define IPTOS_PREC_IMMEDIATE 0x40
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| 37 | #define IPTOS_PREC_PRIORITY 0x20
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| 38 | #define IPTOS_PREC_ROUTINE 0x00
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| 39 |
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| 40 |
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| 41 |
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| 42 | #define IPOPT_COPY 0x80
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| 43 | #define IPOPT_CLASS_MASK 0x60
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| 44 | #define IPOPT_NUMBER_MASK 0x1f
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| 45 |
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| 46 | #define IPOPT_COPIED(o) ((o)&IPOPT_COPY)
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| 47 | #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK)
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| 48 | #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK)
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| 49 |
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| 50 | #define IPOPT_CONTROL 0x00
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| 51 | #define IPOPT_RESERVED1 0x20
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| 52 | #define IPOPT_MEASUREMENT 0x40
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| 53 | #define IPOPT_RESERVED2 0x60
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| 54 |
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| 55 | #define IPOPT_END (0 |IPOPT_CONTROL)
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| 56 | #define IPOPT_NOOP (1 |IPOPT_CONTROL)
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| 57 | #define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY)
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| 58 | #define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY)
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| 59 | #define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT)
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| 60 | #define IPOPT_CIPSO (6 |IPOPT_CONTROL|IPOPT_COPY)
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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
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| 80 | #define IPOPT_TS_TSANDADDR 1
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| 81 | #define IPOPT_TS_PRESPEC 3
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| 82 |
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| 83 | #define IPV4_BEET_PHMAXLEN 8
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| 84 |
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| 85 | struct iphdr {
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| 86 | #if defined(__LITTLE_ENDIAN_BITFIELD)
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| 87 | __u8 ihl:4,
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| 88 | version:4;
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| 89 | #elif defined (__BIG_ENDIAN_BITFIELD)
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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 "Please fix <asm/byteorder.h>"
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| 94 | #endif
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| 95 | __u8 tos;
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| 96 | __be16 tot_len;
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| 97 | __be16 id;
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| 98 | __be16 frag_off;
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| 99 | __u8 ttl;
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| 100 | __u8 protocol;
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| 101 | __sum16 check;
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| 102 | __be32 saddr;
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| 103 | __be32 daddr;
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| 104 |
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| 105 | };
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| 106 |
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| 107 | #ifdef __KERNEL__
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| 108 | #include <linux/skbuff.h>
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| 109 |
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| 110 | static inline struct iphdr *ip_hdr(const struct sk_buff *skb)
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| 111 | {
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| 112 | return (struct iphdr *)skb_network_header(skb);
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| 113 | }
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| 114 |
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| 115 | static inline struct iphdr *ipip_hdr(const struct sk_buff *skb)
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| 116 | {
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| 117 | return (struct iphdr *)skb_transport_header(skb);
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| 118 | }
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| 119 | #endif
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| 120 |
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| 121 | struct ip_auth_hdr {
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| 122 | __u8 nexthdr;
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| 123 | __u8 hdrlen;
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| 124 | __be16 reserved;
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| 125 | __be32 spi;
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| 126 | __be32 seq_no;
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| 127 | __u8 auth_data[0];
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| 128 | };
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| 129 |
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| 130 | struct ip_esp_hdr {
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| 131 | __be32 spi;
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| 132 | __be32 seq_no;
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| 133 | __u8 enc_data[0];
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| 134 | };
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| 135 |
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| 136 | struct ip_comp_hdr {
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| 137 | __u8 nexthdr;
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| 138 | __u8 flags;
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| 139 | __be16 cpi;
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| 140 | };
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| 141 |
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| 142 | struct ip_beet_phdr {
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| 143 | __u8 nexthdr;
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| 144 | __u8 hdrlen;
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| 145 | __u8 padlen;
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| 146 | __u8 reserved;
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| 147 | };
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| 148 |
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| 149 | #endif
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