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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 <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 /* IP options */ |
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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 /* 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 #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 /*The options start here. */ |
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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; /* This one is measured in 32 bit units! */ |
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124 __be16 reserved; |
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125 __be32 spi; |
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126 __be32 seq_no; /* Sequence number */ |
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127 __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ |
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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; /* Sequence number */ |
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133 __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ |
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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 /* _LINUX_IP_H */ |