1 #ifndef _IPV6_H 2 #define _IPV6_H 3 4 #include <linux/in6.h> 5 #include <asm/byteorder.h> 6 7 /* The latest drafts declared increase in minimal mtu up to 1280. */ 8 9 #define IPV6_MIN_MTU 1280 10 11 /* 12 * Advanced API 13 * source interface/address selection, source routing, etc... 14 * *under construction* 15 */ 16 17 18 struct in6_pktinfo { 19 struct in6_addr ipi6_addr; 20 int ipi6_ifindex; 21 }; 22 23 24 struct in6_ifreq { 25 struct in6_addr ifr6_addr; 26 __u32 ifr6_prefixlen; 27 int ifr6_ifindex; 28 }; 29 30 #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */ 31 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */ 32 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */ 33 34 /* 35 * routing header 36 */ 37 struct ipv6_rt_hdr { 38 __u8 nexthdr; 39 __u8 hdrlen; 40 __u8 type; 41 __u8 segments_left; 42 43 /* 44 * type specific data 45 * variable length field 46 */ 47 }; 48 49 50 struct ipv6_opt_hdr { 51 __u8 nexthdr; 52 __u8 hdrlen; 53 /* 54 * TLV encoded option data follows. 55 */ 56 } __attribute__ ((packed)); /* required for some archs */ 57 58 #define ipv6_destopt_hdr ipv6_opt_hdr 59 #define ipv6_hopopt_hdr ipv6_opt_hdr 60 61 62 /* 63 * routing header type 0 (used in cmsghdr struct) 64 */ 65 66 struct rt0_hdr { 67 struct ipv6_rt_hdr rt_hdr; 68 __u32 reserved; 69 struct in6_addr addr[0]; 70 71 #define rt0_type rt_hdr.type 72 }; 73 74 /* 75 * routing header type 2 76 */ 77 78 struct rt2_hdr { 79 struct ipv6_rt_hdr rt_hdr; 80 __u32 reserved; 81 struct in6_addr addr; 82 83 #define rt2_type rt_hdr.type 84 }; 85 86 /* 87 * home address option in destination options header 88 */ 89 90 struct ipv6_destopt_hao { 91 __u8 type; 92 __u8 length; 93 struct in6_addr addr; 94 } __attribute__ ((__packed__)); 95 96 /* 97 * IPv6 fixed header 98 * 99 * BEWARE, it is incorrect. The first 4 bits of flow_lbl 100 * are glued to priority now, forming "class". 101 */ 102 103 struct ipv6hdr { 104 #if defined(__LITTLE_ENDIAN_BITFIELD) 105 __u8 priority:4, 106 version:4; 107 #elif defined(__BIG_ENDIAN_BITFIELD) 108 __u8 version:4, 109 priority:4; 110 #else 111 #error "Please fix <asm/byteorder.h>" 112 #endif 113 __u8 flow_lbl[3]; 114 115 __be16 payload_len; 116 __u8 nexthdr; 117 __u8 hop_limit; 118 119 struct in6_addr saddr; 120 struct in6_addr daddr; 121 }; 122 123 /* 124 * This structure contains configuration options per IPv6 link. 125 */ 126 struct ipv6_devconf { 127 __s32 forwarding; 128 __s32 hop_limit; 129 __s32 mtu6; 130 __s32 accept_ra; 131 __s32 accept_redirects; 132 __s32 autoconf; 133 __s32 dad_transmits; 134 __s32 rtr_solicits; 135 __s32 rtr_solicit_interval; 136 __s32 rtr_solicit_delay; 137 __s32 force_mld_version; 138 #ifdef CONFIG_IPV6_PRIVACY 139 __s32 use_tempaddr; 140 __s32 temp_valid_lft; 141 __s32 temp_prefered_lft; 142 __s32 regen_max_retry; 143 __s32 max_desync_factor; 144 #endif 145 __s32 max_addresses; 146 __s32 accept_ra_defrtr; 147 __s32 accept_ra_pinfo; 148 #ifdef CONFIG_IPV6_ROUTER_PREF 149 __s32 accept_ra_rtr_pref; 150 __s32 rtr_probe_interval; 151 #ifdef CONFIG_IPV6_ROUTE_INFO 152 __s32 accept_ra_rt_info_max_plen; 153 #endif 154 #endif 155 __s32 proxy_ndp; 156 __s32 accept_source_route; 157 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD 158 __s32 optimistic_dad; 159 #endif 160 #ifdef CONFIG_IPV6_MROUTE 161 __s32 mc_forwarding; 162 #endif 163 void *sysctl; 164 }; 165 166 /* index values for the variables in ipv6_devconf */ 167 enum { 168 DEVCONF_FORWARDING = 0, 169 DEVCONF_HOPLIMIT, 170 DEVCONF_MTU6, 171 DEVCONF_ACCEPT_RA, 172 DEVCONF_ACCEPT_REDIRECTS, 173 DEVCONF_AUTOCONF, 174 DEVCONF_DAD_TRANSMITS, 175 DEVCONF_RTR_SOLICITS, 176 DEVCONF_RTR_SOLICIT_INTERVAL, 177 DEVCONF_RTR_SOLICIT_DELAY, 178 DEVCONF_USE_TEMPADDR, 179 DEVCONF_TEMP_VALID_LFT, 180 DEVCONF_TEMP_PREFERED_LFT, 181 DEVCONF_REGEN_MAX_RETRY, 182 DEVCONF_MAX_DESYNC_FACTOR, 183 DEVCONF_MAX_ADDRESSES, 184 DEVCONF_FORCE_MLD_VERSION, 185 DEVCONF_ACCEPT_RA_DEFRTR, 186 DEVCONF_ACCEPT_RA_PINFO, 187 DEVCONF_ACCEPT_RA_RTR_PREF, 188 DEVCONF_RTR_PROBE_INTERVAL, 189 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, 190 DEVCONF_PROXY_NDP, 191 DEVCONF_OPTIMISTIC_DAD, 192 DEVCONF_ACCEPT_SOURCE_ROUTE, 193 DEVCONF_MC_FORWARDING, 194 DEVCONF_MAX 195 }; 196 197 198 #endif /* _IPV6_H */ 199