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422 | giacomo | 1 | #ifndef _IPV6_H |
2 | #define _IPV6_H |
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3 | |||
4 | #include <linux/config.h> |
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5 | #include <linux/in6.h> |
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6 | #include <asm/byteorder.h> |
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7 | |||
8 | /* The latest drafts declared increase in minimal mtu up to 1280. */ |
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9 | |||
10 | #define IPV6_MIN_MTU 1280 |
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11 | |||
12 | /* |
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13 | * Advanced API |
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14 | * source interface/address selection, source routing, etc... |
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15 | * *under construction* |
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16 | */ |
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17 | |||
18 | |||
19 | struct in6_pktinfo { |
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20 | struct in6_addr ipi6_addr; |
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21 | int ipi6_ifindex; |
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22 | }; |
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23 | |||
24 | |||
25 | struct in6_ifreq { |
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26 | struct in6_addr ifr6_addr; |
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27 | __u32 ifr6_prefixlen; |
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28 | int ifr6_ifindex; |
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29 | }; |
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30 | |||
31 | #define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */ |
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32 | #define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */ |
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33 | |||
34 | /* |
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35 | * routing header |
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36 | */ |
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37 | struct ipv6_rt_hdr { |
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38 | __u8 nexthdr; |
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39 | __u8 hdrlen; |
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40 | __u8 type; |
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41 | __u8 segments_left; |
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42 | |||
43 | /* |
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44 | * type specific data |
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45 | * variable length field |
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46 | */ |
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47 | }; |
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48 | |||
49 | |||
50 | struct ipv6_opt_hdr { |
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51 | __u8 nexthdr; |
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52 | __u8 hdrlen; |
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53 | /* |
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54 | * TLV encoded option data follows. |
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55 | */ |
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56 | }; |
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57 | |||
58 | #define ipv6_destopt_hdr ipv6_opt_hdr |
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59 | #define ipv6_hopopt_hdr ipv6_opt_hdr |
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60 | |||
61 | #ifdef __KERNEL__ |
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62 | #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) |
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63 | #endif |
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64 | |||
65 | /* |
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66 | * routing header type 0 (used in cmsghdr struct) |
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67 | */ |
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68 | |||
69 | struct rt0_hdr { |
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70 | struct ipv6_rt_hdr rt_hdr; |
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71 | __u32 bitmap; /* strict/loose bit map */ |
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72 | struct in6_addr addr[0]; |
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73 | |||
74 | #define rt0_type rt_hdr.type |
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75 | }; |
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76 | |||
77 | struct ipv6_auth_hdr { |
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78 | __u8 nexthdr; |
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79 | __u8 hdrlen; /* This one is measured in 32 bit units! */ |
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80 | __u16 reserved; |
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81 | __u32 spi; |
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82 | __u32 seq_no; /* Sequence number */ |
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83 | __u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */ |
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84 | }; |
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85 | |||
86 | struct ipv6_esp_hdr { |
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87 | __u32 spi; |
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88 | __u32 seq_no; /* Sequence number */ |
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89 | __u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */ |
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90 | }; |
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91 | |||
92 | struct ipv6_comp_hdr { |
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93 | __u8 nexthdr; |
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94 | __u8 flags; |
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95 | __u16 cpi; |
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96 | }; |
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97 | |||
98 | /* |
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99 | * IPv6 fixed header |
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100 | * |
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101 | * BEWARE, it is incorrect. The first 4 bits of flow_lbl |
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102 | * are glued to priority now, forming "class". |
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103 | */ |
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104 | |||
105 | struct ipv6hdr { |
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106 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
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107 | __u8 priority:4, |
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108 | version:4; |
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109 | #elif defined(__BIG_ENDIAN_BITFIELD) |
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110 | __u8 version:4, |
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111 | priority:4; |
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112 | #else |
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113 | #error "Please fix <asm/byteorder.h>" |
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114 | #endif |
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115 | __u8 flow_lbl[3]; |
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116 | |||
117 | __u16 payload_len; |
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118 | __u8 nexthdr; |
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119 | __u8 hop_limit; |
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120 | |||
121 | struct in6_addr saddr; |
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122 | struct in6_addr daddr; |
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123 | }; |
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124 | |||
125 | /* |
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126 | * This structure contains configuration options per IPv6 link. |
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127 | */ |
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128 | struct ipv6_devconf { |
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129 | __s32 forwarding; |
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130 | __s32 hop_limit; |
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131 | __s32 mtu6; |
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132 | __s32 accept_ra; |
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133 | __s32 accept_redirects; |
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134 | __s32 autoconf; |
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135 | __s32 dad_transmits; |
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136 | __s32 rtr_solicits; |
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137 | __s32 rtr_solicit_interval; |
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138 | __s32 rtr_solicit_delay; |
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139 | #ifdef CONFIG_IPV6_PRIVACY |
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140 | __s32 use_tempaddr; |
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141 | __s32 temp_valid_lft; |
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142 | __s32 temp_prefered_lft; |
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143 | __s32 regen_max_retry; |
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144 | __s32 max_desync_factor; |
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145 | #endif |
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146 | void *sysctl; |
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147 | }; |
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148 | |||
149 | /* index values for the variables in ipv6_devconf */ |
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150 | enum { |
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151 | DEVCONF_FORWARDING = 0, |
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152 | DEVCONF_HOPLIMIT, |
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153 | DEVCONF_MTU6, |
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154 | DEVCONF_ACCEPT_RA, |
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155 | DEVCONF_ACCEPT_REDIRECTS, |
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156 | DEVCONF_AUTOCONF, |
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157 | DEVCONF_DAD_TRANSMITS, |
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158 | DEVCONF_RTR_SOLICITS, |
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159 | DEVCONF_RTR_SOLICIT_INTERVAL, |
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160 | DEVCONF_RTR_SOLICIT_DELAY, |
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161 | #ifdef CONFIG_IPV6_PRIVACY |
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162 | DEVCONF_USE_TEMPADDR, |
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163 | DEVCONF_TEMP_VALID_LFT, |
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164 | DEVCONF_TEMP_PREFERED_LFT, |
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165 | DEVCONF_REGEN_MAX_RETRY, |
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166 | DEVCONF_MAX_DESYNC_FACTOR, |
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167 | #endif |
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168 | DEVCONF_MAX |
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169 | }; |
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170 | |||
171 | #ifdef __KERNEL__ |
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172 | #include <linux/in6.h> /* struct sockaddr_in6 */ |
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173 | #include <linux/icmpv6.h> |
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174 | #include <net/if_inet6.h> /* struct ipv6_mc_socklist */ |
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175 | #include <linux/tcp.h> |
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176 | #include <linux/udp.h> |
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177 | |||
178 | /* |
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179 | This structure contains results of exthdrs parsing |
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180 | as offsets from skb->nh. |
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181 | */ |
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182 | |||
183 | struct inet6_skb_parm |
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184 | { |
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185 | int iif; |
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186 | __u16 ra; |
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187 | __u16 hop; |
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188 | __u16 auth; |
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189 | __u16 dst0; |
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190 | __u16 srcrt; |
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191 | __u16 dst1; |
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192 | }; |
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193 | |||
194 | struct ipv6_pinfo { |
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195 | struct in6_addr saddr; |
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196 | struct in6_addr rcv_saddr; |
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197 | struct in6_addr daddr; |
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198 | struct in6_addr *daddr_cache; |
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199 | |||
200 | __u32 flow_label; |
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201 | __u32 frag_size; |
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202 | int hop_limit; |
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203 | int mcast_hops; |
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204 | int mcast_oif; |
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205 | |||
206 | /* pktoption flags */ |
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207 | union { |
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208 | struct { |
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209 | __u8 srcrt:2, |
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210 | rxinfo:1, |
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211 | rxhlim:1, |
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212 | hopopts:1, |
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213 | dstopts:1, |
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214 | authhdr:1, |
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215 | rxflow:1; |
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216 | } bits; |
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217 | __u8 all; |
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218 | } rxopt; |
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219 | |||
220 | /* sockopt flags */ |
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221 | __u8 mc_loop:1, |
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222 | recverr:1, |
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223 | sndflow:1, |
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224 | pmtudisc:2, |
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225 | ipv6only:1; |
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226 | |||
227 | struct ipv6_mc_socklist *ipv6_mc_list; |
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228 | struct ipv6_ac_socklist *ipv6_ac_list; |
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229 | struct ipv6_fl_socklist *ipv6_fl_list; |
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230 | __u32 dst_cookie; |
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231 | |||
232 | struct ipv6_txoptions *opt; |
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233 | struct sk_buff *pktoptions; |
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234 | struct { |
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235 | struct ipv6_txoptions *opt; |
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236 | struct rt6_info *rt; |
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237 | int hop_limit; |
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238 | } cork; |
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239 | }; |
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240 | |||
241 | struct raw6_opt { |
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242 | __u32 checksum; /* perform checksum */ |
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243 | __u32 offset; /* checksum offset */ |
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244 | |||
245 | struct icmp6_filter filter; |
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246 | }; |
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247 | |||
248 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ |
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249 | struct raw6_sock { |
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250 | struct sock sk; |
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251 | struct ipv6_pinfo *pinet6; |
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252 | struct inet_opt inet; |
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253 | struct raw6_opt raw6; |
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254 | struct ipv6_pinfo inet6; |
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255 | }; |
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256 | |||
257 | struct udp6_sock { |
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258 | struct sock sk; |
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259 | struct ipv6_pinfo *pinet6; |
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260 | struct inet_opt inet; |
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261 | struct udp_opt udp; |
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262 | struct ipv6_pinfo inet6; |
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263 | }; |
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264 | |||
265 | struct tcp6_sock { |
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266 | struct sock sk; |
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267 | struct ipv6_pinfo *pinet6; |
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268 | struct inet_opt inet; |
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269 | struct tcp_opt tcp; |
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270 | struct ipv6_pinfo inet6; |
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271 | }; |
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272 | |||
273 | #define inet6_sk(__sk) ((struct raw6_sock *)__sk)->pinet6 |
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274 | #define raw6_sk(__sk) (&((struct raw6_sock *)__sk)->raw6) |
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275 | |||
276 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
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277 | #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) |
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278 | #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) |
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279 | #else |
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280 | #define __ipv6_only_sock(sk) 0 |
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281 | #define ipv6_only_sock(sk) 0 |
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282 | #endif |
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283 | |||
284 | #endif |
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285 | |||
286 | #endif |