1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _UAPI_IPV6_H 3 #define _UAPI_IPV6_H 4 5 #include <linux/libc-compat.h> 6 #include <linux/types.h> 7 #include <linux/stddef.h> 8 #include <linux/in6.h> 9 #include <asm/byteorder.h> 10 11 /* The latest drafts declared increase in minimal mtu up to 1280. */ 12 13 #define IPV6_MIN_MTU 1280 14 15 /* 16 * Advanced API 17 * source interface/address selection, source routing, etc... 18 * *under construction* 19 */ 20 21 #if __UAPI_DEF_IN6_PKTINFO 22 struct in6_pktinfo { 23 struct in6_addr ipi6_addr; 24 int ipi6_ifindex; 25 }; 26 #endif 27 28 #if __UAPI_DEF_IP6_MTUINFO 29 struct ip6_mtuinfo { 30 struct sockaddr_in6 ip6m_addr; 31 __u32 ip6m_mtu; 32 }; 33 #endif 34 35 struct in6_ifreq { 36 struct in6_addr ifr6_addr; 37 __u32 ifr6_prefixlen; 38 int ifr6_ifindex; 39 }; 40 41 #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */ 42 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */ 43 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */ 44 #define IPV6_SRCRT_TYPE_3 3 /* RPL Segment Routing with IPv6 */ 45 #define IPV6_SRCRT_TYPE_4 4 /* Segment Routing with IPv6 */ 46 47 /* 48 * routing header 49 */ 50 struct ipv6_rt_hdr { 51 __u8 nexthdr; 52 __u8 hdrlen; 53 __u8 type; 54 __u8 segments_left; 55 56 /* 57 * type specific data 58 * variable length field 59 */ 60 }; 61 62 63 struct ipv6_opt_hdr { 64 __u8 nexthdr; 65 __u8 hdrlen; 66 /* 67 * TLV encoded option data follows. 68 */ 69 } __attribute__((packed)); /* required for some archs */ 70 71 #define ipv6_destopt_hdr ipv6_opt_hdr 72 #define ipv6_hopopt_hdr ipv6_opt_hdr 73 74 /* Router Alert option values (RFC2711) */ 75 #define IPV6_OPT_ROUTERALERT_MLD 0x0000 /* MLD(RFC2710) */ 76 77 /* 78 * routing header type 0 (used in cmsghdr struct) 79 */ 80 81 struct rt0_hdr { 82 struct ipv6_rt_hdr rt_hdr; 83 __u32 reserved; 84 struct in6_addr addr[]; 85 86 #define rt0_type rt_hdr.type 87 }; 88 89 /* 90 * routing header type 2 91 */ 92 93 struct rt2_hdr { 94 struct ipv6_rt_hdr rt_hdr; 95 __u32 reserved; 96 struct in6_addr addr; 97 98 #define rt2_type rt_hdr.type 99 }; 100 101 /* 102 * home address option in destination options header 103 */ 104 105 struct ipv6_destopt_hao { 106 __u8 type; 107 __u8 length; 108 struct in6_addr addr; 109 } __attribute__((packed)); 110 111 /* 112 * IPv6 fixed header 113 * 114 * BEWARE, it is incorrect. The first 4 bits of flow_lbl 115 * are glued to priority now, forming "class". 116 */ 117 118 struct ipv6hdr { 119 #if defined(__LITTLE_ENDIAN_BITFIELD) 120 __u8 priority:4, 121 version:4; 122 #elif defined(__BIG_ENDIAN_BITFIELD) 123 __u8 version:4, 124 priority:4; 125 #else 126 #error "Please fix <asm/byteorder.h>" 127 #endif 128 __u8 flow_lbl[3]; 129 130 __be16 payload_len; 131 __u8 nexthdr; 132 __u8 hop_limit; 133 134 __struct_group(/* no tag */, addrs, /* no attrs */, 135 struct in6_addr saddr; 136 struct in6_addr daddr; 137 ); 138 }; 139 140 141 /* index values for the variables in ipv6_devconf */ 142 enum { 143 DEVCONF_FORWARDING = 0, 144 DEVCONF_HOPLIMIT, 145 DEVCONF_MTU6, 146 DEVCONF_ACCEPT_RA, 147 DEVCONF_ACCEPT_REDIRECTS, 148 DEVCONF_AUTOCONF, 149 DEVCONF_DAD_TRANSMITS, 150 DEVCONF_RTR_SOLICITS, 151 DEVCONF_RTR_SOLICIT_INTERVAL, 152 DEVCONF_RTR_SOLICIT_DELAY, 153 DEVCONF_USE_TEMPADDR, 154 DEVCONF_TEMP_VALID_LFT, 155 DEVCONF_TEMP_PREFERED_LFT, 156 DEVCONF_REGEN_MAX_RETRY, 157 DEVCONF_MAX_DESYNC_FACTOR, 158 DEVCONF_MAX_ADDRESSES, 159 DEVCONF_FORCE_MLD_VERSION, 160 DEVCONF_ACCEPT_RA_DEFRTR, 161 DEVCONF_ACCEPT_RA_PINFO, 162 DEVCONF_ACCEPT_RA_RTR_PREF, 163 DEVCONF_RTR_PROBE_INTERVAL, 164 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, 165 DEVCONF_PROXY_NDP, 166 DEVCONF_OPTIMISTIC_DAD, 167 DEVCONF_ACCEPT_SOURCE_ROUTE, 168 DEVCONF_MC_FORWARDING, 169 DEVCONF_DISABLE_IPV6, 170 DEVCONF_ACCEPT_DAD, 171 DEVCONF_FORCE_TLLAO, 172 DEVCONF_NDISC_NOTIFY, 173 DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL, 174 DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL, 175 DEVCONF_SUPPRESS_FRAG_NDISC, 176 DEVCONF_ACCEPT_RA_FROM_LOCAL, 177 DEVCONF_USE_OPTIMISTIC, 178 DEVCONF_ACCEPT_RA_MTU, 179 DEVCONF_STABLE_SECRET, 180 DEVCONF_USE_OIF_ADDRS_ONLY, 181 DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT, 182 DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN, 183 DEVCONF_DROP_UNICAST_IN_L2_MULTICAST, 184 DEVCONF_DROP_UNSOLICITED_NA, 185 DEVCONF_KEEP_ADDR_ON_DOWN, 186 DEVCONF_RTR_SOLICIT_MAX_INTERVAL, 187 DEVCONF_SEG6_ENABLED, 188 DEVCONF_SEG6_REQUIRE_HMAC, 189 DEVCONF_ENHANCED_DAD, 190 DEVCONF_ADDR_GEN_MODE, 191 DEVCONF_DISABLE_POLICY, 192 DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN, 193 DEVCONF_NDISC_TCLASS, 194 DEVCONF_RPL_SEG_ENABLED, 195 DEVCONF_RA_DEFRTR_METRIC, 196 DEVCONF_IOAM6_ENABLED, 197 DEVCONF_IOAM6_ID, 198 DEVCONF_IOAM6_ID_WIDE, 199 DEVCONF_NDISC_EVICT_NOCARRIER, 200 DEVCONF_ACCEPT_UNTRACKED_NA, 201 DEVCONF_ACCEPT_RA_MIN_LFT, 202 DEVCONF_MAX 203 }; 204 205 206 #endif /* _UAPI_IPV6_H */ 207