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422 | giacomo | 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, <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/byteorder.h> |
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20 | |||
21 | #define IPTOS_TOS_MASK 0x1E |
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22 | #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK) |
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23 | #define IPTOS_LOWDELAY 0x10 |
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24 | #define IPTOS_THROUGHPUT 0x08 |
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25 | #define IPTOS_RELIABILITY 0x04 |
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26 | #define IPTOS_MINCOST 0x02 |
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27 | |||
28 | #define IPTOS_PREC_MASK 0xE0 |
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29 | #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK) |
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30 | #define IPTOS_PREC_NETCONTROL 0xe0 |
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31 | #define IPTOS_PREC_INTERNETCONTROL 0xc0 |
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32 | #define IPTOS_PREC_CRITIC_ECP 0xa0 |
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33 | #define IPTOS_PREC_FLASHOVERRIDE 0x80 |
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34 | #define IPTOS_PREC_FLASH 0x60 |
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35 | #define IPTOS_PREC_IMMEDIATE 0x40 |
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36 | #define IPTOS_PREC_PRIORITY 0x20 |
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37 | #define IPTOS_PREC_ROUTINE 0x00 |
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38 | |||
39 | |||
40 | /* IP options */ |
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41 | #define IPOPT_COPY 0x80 |
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42 | #define IPOPT_CLASS_MASK 0x60 |
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43 | #define IPOPT_NUMBER_MASK 0x1f |
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44 | |||
45 | #define IPOPT_COPIED(o) ((o)&IPOPT_COPY) |
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46 | #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK) |
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47 | #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK) |
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48 | |||
49 | #define IPOPT_CONTROL 0x00 |
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50 | #define IPOPT_RESERVED1 0x20 |
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51 | #define IPOPT_MEASUREMENT 0x40 |
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52 | #define IPOPT_RESERVED2 0x60 |
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53 | |||
54 | #define IPOPT_END (0 |IPOPT_CONTROL) |
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55 | #define IPOPT_NOOP (1 |IPOPT_CONTROL) |
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56 | #define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY) |
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57 | #define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY) |
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58 | #define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT) |
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59 | #define IPOPT_RR (7 |IPOPT_CONTROL) |
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60 | #define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY) |
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61 | #define IPOPT_SSRR (9 |IPOPT_CONTROL|IPOPT_COPY) |
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62 | #define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY) |
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63 | |||
64 | #define IPVERSION 4 |
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65 | #define MAXTTL 255 |
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66 | #define IPDEFTTL 64 |
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67 | |||
68 | #define IPOPT_OPTVAL 0 |
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69 | #define IPOPT_OLEN 1 |
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70 | #define IPOPT_OFFSET 2 |
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71 | #define IPOPT_MINOFF 4 |
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72 | #define MAX_IPOPTLEN 40 |
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73 | #define IPOPT_NOP IPOPT_NOOP |
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74 | #define IPOPT_EOL IPOPT_END |
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75 | #define IPOPT_TS IPOPT_TIMESTAMP |
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76 | |||
77 | #define IPOPT_TS_TSONLY 0 /* timestamps only */ |
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78 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ |
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79 | #define IPOPT_TS_PRESPEC 3 /* specified modules only */ |
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80 | |||
81 | #ifdef __KERNEL__ |
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82 | #include <linux/config.h> |
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83 | #include <linux/types.h> |
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84 | #include <net/sock.h> |
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85 | #include <linux/igmp.h> |
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86 | #include <net/flow.h> |
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87 | |||
88 | struct ip_options { |
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89 | __u32 faddr; /* Saved first hop address */ |
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90 | unsigned char optlen; |
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91 | unsigned char srr; |
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92 | unsigned char rr; |
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93 | unsigned char ts; |
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94 | unsigned char is_setbyuser:1, /* Set by setsockopt? */ |
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95 | is_data:1, /* Options in __data, rather than skb */ |
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96 | is_strictroute:1, /* Strict source route */ |
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97 | srr_is_hit:1, /* Packet destination addr was our one */ |
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98 | is_changed:1, /* IP checksum more not valid */ |
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99 | rr_needaddr:1, /* Need to record addr of outgoing dev */ |
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100 | ts_needtime:1, /* Need to record timestamp */ |
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101 | ts_needaddr:1; /* Need to record addr of outgoing dev */ |
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102 | unsigned char router_alert; |
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103 | unsigned char __pad1; |
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104 | unsigned char __pad2; |
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105 | unsigned char __data[0]; |
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106 | }; |
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107 | |||
108 | #define optlength(opt) (sizeof(struct ip_options) + opt->optlen) |
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109 | |||
110 | struct inet_opt { |
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111 | /* Socket demultiplex comparisons on incoming packets. */ |
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112 | __u32 daddr; /* Foreign IPv4 addr */ |
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113 | __u32 rcv_saddr; /* Bound local IPv4 addr */ |
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114 | __u16 dport; /* Destination port */ |
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115 | __u16 num; /* Local port */ |
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116 | __u32 saddr; /* Sending source */ |
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117 | int uc_ttl; /* Unicast TTL */ |
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118 | int tos; /* TOS */ |
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119 | unsigned cmsg_flags; |
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120 | struct ip_options *opt; |
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121 | __u16 sport; /* Source port */ |
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122 | unsigned char hdrincl; /* Include headers ? */ |
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123 | __u8 mc_ttl; /* Multicasting TTL */ |
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124 | __u8 mc_loop; /* Loopback */ |
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125 | __u8 pmtudisc; |
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126 | __u16 id; /* ID counter for DF pkts */ |
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127 | unsigned recverr : 1, |
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128 | freebind : 1; |
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129 | int mc_index; /* Multicast device index */ |
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130 | __u32 mc_addr; |
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131 | struct ip_mc_socklist *mc_list; /* Group array */ |
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132 | struct page *sndmsg_page; /* Cached page for sendmsg */ |
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133 | u32 sndmsg_off; /* Cached offset for sendmsg */ |
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134 | /* |
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135 | * Following members are used to retain the infomation to build |
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136 | * an ip header on each ip fragmentation while the socket is corked. |
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137 | */ |
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138 | struct { |
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139 | unsigned int flags; |
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140 | unsigned int fragsize; |
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141 | struct ip_options *opt; |
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142 | struct rtable *rt; |
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143 | int length; /* Total length of all frames */ |
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144 | u32 addr; |
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145 | struct flowi fl; |
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146 | } cork; |
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147 | }; |
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148 | |||
149 | #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */ |
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150 | |||
151 | struct ipv6_pinfo; |
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152 | |||
153 | /* WARNING: don't change the layout of the members in inet_sock! */ |
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154 | struct inet_sock { |
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155 | struct sock sk; |
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156 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
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157 | struct ipv6_pinfo *pinet6; |
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158 | #endif |
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159 | struct inet_opt inet; |
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160 | }; |
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161 | |||
162 | #define inet_sk(__sk) (&((struct inet_sock *)__sk)->inet) |
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163 | |||
164 | #endif |
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165 | |||
166 | struct iphdr { |
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167 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
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168 | __u8 ihl:4, |
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169 | version:4; |
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170 | #elif defined (__BIG_ENDIAN_BITFIELD) |
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171 | __u8 version:4, |
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172 | ihl:4; |
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173 | #else |
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174 | #error "Please fix <asm/byteorder.h>" |
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175 | #endif |
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176 | __u8 tos; |
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177 | __u16 tot_len; |
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178 | __u16 id; |
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179 | __u16 frag_off; |
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180 | __u8 ttl; |
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181 | __u8 protocol; |
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182 | __u16 check; |
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183 | __u32 saddr; |
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184 | __u32 daddr; |
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185 | /*The options start here. */ |
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186 | }; |
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187 | |||
188 | struct ip_auth_hdr { |
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189 | __u8 nexthdr; |
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190 | __u8 hdrlen; /* This one is measured in 32 bit units! */ |
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191 | __u16 reserved; |
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192 | __u32 spi; |
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193 | __u32 seq_no; /* Sequence number */ |
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194 | __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ |
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195 | }; |
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196 | |||
197 | struct ip_esp_hdr { |
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198 | __u32 spi; |
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199 | __u32 seq_no; /* Sequence number */ |
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200 | __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ |
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201 | }; |
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202 | |||
203 | struct ip_comp_hdr { |
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204 | __u8 nexthdr; |
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205 | __u8 flags; |
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206 | __u16 cpi; |
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207 | }; |
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208 | |||
209 | #endif /* _LINUX_IP_H */ |