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/in6.h> 8 #include <asm/byteorder.h> 9 10 /* The latest drafts declared increase in minimal mtu up to 1280. */ 11 12 #define IPV6_MIN_MTU 1280 13 14 /* 15 * Advanced API 16 * source interface/address selection, source routing, etc... 17 * *under construction* 18 */ 19 20 #if __UAPI_DEF_IN6_PKTINFO 21 struct in6_pktinfo { 22 struct in6_addr ipi6_addr; 23 int ipi6_ifindex; 24 }; 25 #endif 26 27 #if __UAPI_DEF_IP6_MTUINFO 28 struct ip6_mtuinfo { 29 struct sockaddr_in6 ip6m_addr; 30 uint32_t ip6m_mtu; 31 }; 32 #endif 33 34 struct in6_ifreq { 35 struct in6_addr ifr6_addr; 36 uint32_t ifr6_prefixlen; 37 int ifr6_ifindex; 38 }; 39 40 #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */ 41 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */ 42 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */ 43 #define IPV6_SRCRT_TYPE_3 3 /* RPL Segment Routing with IPv6 */ 44 #define IPV6_SRCRT_TYPE_4 4 /* Segment Routing with IPv6 */ 45 46 /* 47 * routing header 48 */ 49 struct ipv6_rt_hdr { 50 uint8_t nexthdr; 51 uint8_t hdrlen; 52 uint8_t type; 53 uint8_t segments_left; 54 55 /* 56 * type specific data 57 * variable length field 58 */ 59 }; 60 61 62 struct ipv6_opt_hdr { 63 uint8_t nexthdr; 64 uint8_t hdrlen; 65 /* 66 * TLV encoded option data follows. 67 */ 68 } __attribute__((packed)); /* required for some archs */ 69 70 #define ipv6_destopt_hdr ipv6_opt_hdr 71 #define ipv6_hopopt_hdr ipv6_opt_hdr 72 73 /* Router Alert option values (RFC2711) */ 74 #define IPV6_OPT_ROUTERALERT_MLD 0x0000 /* MLD(RFC2710) */ 75 76 /* 77 * routing header type 0 (used in cmsghdr struct) 78 */ 79 80 struct rt0_hdr { 81 struct ipv6_rt_hdr rt_hdr; 82 uint32_t reserved; 83 struct in6_addr addr[0]; 84 85 #define rt0_type rt_hdr.type 86 }; 87 88 /* 89 * routing header type 2 90 */ 91 92 struct rt2_hdr { 93 struct ipv6_rt_hdr rt_hdr; 94 uint32_t reserved; 95 struct in6_addr addr; 96 97 #define rt2_type rt_hdr.type 98 }; 99 100 /* 101 * home address option in destination options header 102 */ 103 104 struct ipv6_destopt_hao { 105 uint8_t type; 106 uint8_t length; 107 struct in6_addr addr; 108 } __attribute__((packed)); 109 110 /* 111 * IPv6 fixed header 112 * 113 * BEWARE, it is incorrect. The first 4 bits of flow_lbl 114 * are glued to priority now, forming "class". 115 */ 116 117 struct ipv6hdr { 118 #if defined(__LITTLE_ENDIAN_BITFIELD) 119 uint8_t priority:4, 120 version:4; 121 #elif defined(__BIG_ENDIAN_BITFIELD) 122 uint8_t version:4, 123 priority:4; 124 #else 125 #error "Please fix <asm/byteorder.h>" 126 #endif 127 uint8_t flow_lbl[3]; 128 129 uint16_t payload_len; 130 uint8_t nexthdr; 131 uint8_t hop_limit; 132 133 struct in6_addr saddr; 134 struct in6_addr daddr; 135 }; 136 137 138 /* index values for the variables in ipv6_devconf */ 139 enum { 140 DEVCONF_FORWARDING = 0, 141 DEVCONF_HOPLIMIT, 142 DEVCONF_MTU6, 143 DEVCONF_ACCEPT_RA, 144 DEVCONF_ACCEPT_REDIRECTS, 145 DEVCONF_AUTOCONF, 146 DEVCONF_DAD_TRANSMITS, 147 DEVCONF_RTR_SOLICITS, 148 DEVCONF_RTR_SOLICIT_INTERVAL, 149 DEVCONF_RTR_SOLICIT_DELAY, 150 DEVCONF_USE_TEMPADDR, 151 DEVCONF_TEMP_VALID_LFT, 152 DEVCONF_TEMP_PREFERED_LFT, 153 DEVCONF_REGEN_MAX_RETRY, 154 DEVCONF_MAX_DESYNC_FACTOR, 155 DEVCONF_MAX_ADDRESSES, 156 DEVCONF_FORCE_MLD_VERSION, 157 DEVCONF_ACCEPT_RA_DEFRTR, 158 DEVCONF_ACCEPT_RA_PINFO, 159 DEVCONF_ACCEPT_RA_RTR_PREF, 160 DEVCONF_RTR_PROBE_INTERVAL, 161 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, 162 DEVCONF_PROXY_NDP, 163 DEVCONF_OPTIMISTIC_DAD, 164 DEVCONF_ACCEPT_SOURCE_ROUTE, 165 DEVCONF_MC_FORWARDING, 166 DEVCONF_DISABLE_IPV6, 167 DEVCONF_ACCEPT_DAD, 168 DEVCONF_FORCE_TLLAO, 169 DEVCONF_NDISC_NOTIFY, 170 DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL, 171 DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL, 172 DEVCONF_SUPPRESS_FRAG_NDISC, 173 DEVCONF_ACCEPT_RA_FROM_LOCAL, 174 DEVCONF_USE_OPTIMISTIC, 175 DEVCONF_ACCEPT_RA_MTU, 176 DEVCONF_STABLE_SECRET, 177 DEVCONF_USE_OIF_ADDRS_ONLY, 178 DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT, 179 DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN, 180 DEVCONF_DROP_UNICAST_IN_L2_MULTICAST, 181 DEVCONF_DROP_UNSOLICITED_NA, 182 DEVCONF_KEEP_ADDR_ON_DOWN, 183 DEVCONF_RTR_SOLICIT_MAX_INTERVAL, 184 DEVCONF_SEG6_ENABLED, 185 DEVCONF_SEG6_REQUIRE_HMAC, 186 DEVCONF_ENHANCED_DAD, 187 DEVCONF_ADDR_GEN_MODE, 188 DEVCONF_DISABLE_POLICY, 189 DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN, 190 DEVCONF_NDISC_TCLASS, 191 DEVCONF_RPL_SEG_ENABLED, 192 DEVCONF_RA_DEFRTR_METRIC, 193 DEVCONF_MAX 194 }; 195 196 197 #endif /* _UAPI_IPV6_H */ 198