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 __u32 ip6m_mtu; 31 }; 32 #endif 33 34 struct in6_ifreq { 35 struct in6_addr ifr6_addr; 36 __u32 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_4 4 /* Segment Routing with IPv6 */ 44 45 /* 46 * routing header 47 */ 48 struct ipv6_rt_hdr { 49 __u8 nexthdr; 50 __u8 hdrlen; 51 __u8 type; 52 __u8 segments_left; 53 54 /* 55 * type specific data 56 * variable length field 57 */ 58 }; 59 60 61 struct ipv6_opt_hdr { 62 __u8 nexthdr; 63 __u8 hdrlen; 64 /* 65 * TLV encoded option data follows. 66 */ 67 } __attribute__((packed)); /* required for some archs */ 68 69 #define ipv6_destopt_hdr ipv6_opt_hdr 70 #define ipv6_hopopt_hdr ipv6_opt_hdr 71 72 /* Router Alert option values (RFC2711) */ 73 #define IPV6_OPT_ROUTERALERT_MLD 0x0000 /* MLD(RFC2710) */ 74 75 /* 76 * routing header type 0 (used in cmsghdr struct) 77 */ 78 79 struct rt0_hdr { 80 struct ipv6_rt_hdr rt_hdr; 81 __u32 reserved; 82 struct in6_addr addr[0]; 83 84 #define rt0_type rt_hdr.type 85 }; 86 87 /* 88 * routing header type 2 89 */ 90 91 struct rt2_hdr { 92 struct ipv6_rt_hdr rt_hdr; 93 __u32 reserved; 94 struct in6_addr addr; 95 96 #define rt2_type rt_hdr.type 97 }; 98 99 /* 100 * home address option in destination options header 101 */ 102 103 struct ipv6_destopt_hao { 104 __u8 type; 105 __u8 length; 106 struct in6_addr addr; 107 } __attribute__((packed)); 108 109 /* 110 * IPv6 fixed header 111 * 112 * BEWARE, it is incorrect. The first 4 bits of flow_lbl 113 * are glued to priority now, forming "class". 114 */ 115 116 struct ipv6hdr { 117 #if defined(__LITTLE_ENDIAN_BITFIELD) 118 __u8 priority:4, 119 version:4; 120 #elif defined(__BIG_ENDIAN_BITFIELD) 121 __u8 version:4, 122 priority:4; 123 #else 124 #error "Please fix <asm/byteorder.h>" 125 #endif 126 __u8 flow_lbl[3]; 127 128 __be16 payload_len; 129 __u8 nexthdr; 130 __u8 hop_limit; 131 132 struct in6_addr saddr; 133 struct in6_addr daddr; 134 }; 135 136 137 /* index values for the variables in ipv6_devconf */ 138 enum { 139 DEVCONF_FORWARDING = 0, 140 DEVCONF_HOPLIMIT, 141 DEVCONF_MTU6, 142 DEVCONF_ACCEPT_RA, 143 DEVCONF_ACCEPT_REDIRECTS, 144 DEVCONF_AUTOCONF, 145 DEVCONF_DAD_TRANSMITS, 146 DEVCONF_RTR_SOLICITS, 147 DEVCONF_RTR_SOLICIT_INTERVAL, 148 DEVCONF_RTR_SOLICIT_DELAY, 149 DEVCONF_USE_TEMPADDR, 150 DEVCONF_TEMP_VALID_LFT, 151 DEVCONF_TEMP_PREFERED_LFT, 152 DEVCONF_REGEN_MAX_RETRY, 153 DEVCONF_MAX_DESYNC_FACTOR, 154 DEVCONF_MAX_ADDRESSES, 155 DEVCONF_FORCE_MLD_VERSION, 156 DEVCONF_ACCEPT_RA_DEFRTR, 157 DEVCONF_ACCEPT_RA_PINFO, 158 DEVCONF_ACCEPT_RA_RTR_PREF, 159 DEVCONF_RTR_PROBE_INTERVAL, 160 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, 161 DEVCONF_PROXY_NDP, 162 DEVCONF_OPTIMISTIC_DAD, 163 DEVCONF_ACCEPT_SOURCE_ROUTE, 164 DEVCONF_MC_FORWARDING, 165 DEVCONF_DISABLE_IPV6, 166 DEVCONF_ACCEPT_DAD, 167 DEVCONF_FORCE_TLLAO, 168 DEVCONF_NDISC_NOTIFY, 169 DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL, 170 DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL, 171 DEVCONF_SUPPRESS_FRAG_NDISC, 172 DEVCONF_ACCEPT_RA_FROM_LOCAL, 173 DEVCONF_USE_OPTIMISTIC, 174 DEVCONF_ACCEPT_RA_MTU, 175 DEVCONF_STABLE_SECRET, 176 DEVCONF_USE_OIF_ADDRS_ONLY, 177 DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT, 178 DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN, 179 DEVCONF_DROP_UNICAST_IN_L2_MULTICAST, 180 DEVCONF_DROP_UNSOLICITED_NA, 181 DEVCONF_KEEP_ADDR_ON_DOWN, 182 DEVCONF_RTR_SOLICIT_MAX_INTERVAL, 183 DEVCONF_SEG6_ENABLED, 184 DEVCONF_SEG6_REQUIRE_HMAC, 185 DEVCONF_ENHANCED_DAD, 186 DEVCONF_ADDR_GEN_MODE, 187 DEVCONF_DISABLE_POLICY, 188 DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN, 189 DEVCONF_NDISC_TCLASS, 190 DEVCONF_MAX 191 }; 192 193 194 #endif /* _UAPI_IPV6_H */ 195