1 /* Copyright (C) 1991-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 /* Linux version. */ 19 20 #ifndef _NETINET_IN_H 21 # error "Never use <bits/in.h> directly; include <netinet/in.h> instead." 22 #endif 23 24 /* If the application has already included linux/in6.h from a linux-based 25 kernel then we will not define the IPv6 IPPROTO_* defines, in6_addr (nor the 26 defines), sockaddr_in6, or ipv6_mreq. Same for in6_ptkinfo or ip6_mtuinfo 27 in linux/ipv6.h. The ABI used by the linux-kernel and glibc match exactly. 28 Neither the linux kernel nor glibc should break this ABI without coordination. 29 In upstream kernel 56c176c9 the _UAPI prefix was stripped so we need to check 30 for _LINUX_IN6_H and _IPV6_H now, and keep checking the old versions for 31 maximum backwards compatibility. */ 32 #if defined _UAPI_LINUX_IN6_H \ 33 || defined _UAPI_IPV6_H \ 34 || defined _LINUX_IN6_H \ 35 || defined _IPV6_H 36 /* This is not quite the same API since the kernel always defines s6_addr16 and 37 s6_addr32. This is not a violation of POSIX since POSIX says "at least the 38 following member" and that holds true. */ 39 # define __USE_KERNEL_IPV6_DEFS 1 40 #else 41 # define __USE_KERNEL_IPV6_DEFS 0 42 #endif 43 44 /* Options for use with `getsockopt' and `setsockopt' at the IP level. 45 The first word in the comment at the right is the data type used; 46 "bool" means a boolean value stored in an `int'. */ 47 #define IP_OPTIONS 4 /* ip_opts; IP per-packet options. */ 48 #define IP_HDRINCL 3 /* int; Header is included with data. */ 49 #define IP_TOS 1 /* int; IP type of service and precedence. */ 50 #define IP_TTL 2 /* int; IP time to live. */ 51 #define IP_RECVOPTS 6 /* bool; Receive all IP options w/datagram. */ 52 /* For BSD compatibility. */ 53 #define IP_RECVRETOPTS IP_RETOPTS /* bool; Receive IP options for response. */ 54 #define IP_RETOPTS 7 /* ip_opts; Set/get IP per-packet options. */ 55 #define IP_MULTICAST_IF 32 /* in_addr; set/get IP multicast i/f */ 56 #define IP_MULTICAST_TTL 33 /* unsigned char; set/get IP multicast ttl */ 57 #define IP_MULTICAST_LOOP 34 /* bool; set/get IP multicast loopback */ 58 #define IP_ADD_MEMBERSHIP 35 /* ip_mreq; add an IP group membership */ 59 #define IP_DROP_MEMBERSHIP 36 /* ip_mreq; drop an IP group membership */ 60 #define IP_UNBLOCK_SOURCE 37 /* ip_mreq_source: unblock data from source */ 61 #define IP_BLOCK_SOURCE 38 /* ip_mreq_source: block data from source */ 62 #define IP_ADD_SOURCE_MEMBERSHIP 39 /* ip_mreq_source: join source group */ 63 #define IP_DROP_SOURCE_MEMBERSHIP 40 /* ip_mreq_source: leave source group */ 64 #define IP_MSFILTER 41 65 #ifdef __USE_MISC 66 # define MCAST_JOIN_GROUP 42 /* group_req: join any-source group */ 67 # define MCAST_BLOCK_SOURCE 43 /* group_source_req: block from given group */ 68 # define MCAST_UNBLOCK_SOURCE 44 /* group_source_req: unblock from given group*/ 69 # define MCAST_LEAVE_GROUP 45 /* group_req: leave any-source group */ 70 # define MCAST_JOIN_SOURCE_GROUP 46 /* group_source_req: join source-spec gr */ 71 # define MCAST_LEAVE_SOURCE_GROUP 47 /* group_source_req: leave source-spec gr*/ 72 # define MCAST_MSFILTER 48 73 # define IP_MULTICAST_ALL 49 74 # define IP_UNICAST_IF 50 75 76 # define MCAST_EXCLUDE 0 77 # define MCAST_INCLUDE 1 78 #endif 79 80 #define IP_ROUTER_ALERT 5 /* bool */ 81 #define IP_PKTINFO 8 /* bool */ 82 #define IP_PKTOPTIONS 9 83 #define IP_PMTUDISC 10 /* obsolete name? */ 84 #define IP_MTU_DISCOVER 10 /* int; see below */ 85 #define IP_RECVERR 11 /* bool */ 86 #define IP_RECVTTL 12 /* bool */ 87 #define IP_RECVTOS 13 /* bool */ 88 #define IP_MTU 14 /* int */ 89 #define IP_FREEBIND 15 90 #define IP_IPSEC_POLICY 16 91 #define IP_XFRM_POLICY 17 92 #define IP_PASSSEC 18 93 #define IP_TRANSPARENT 19 94 #define IP_MULTICAST_ALL 49 /* bool */ 95 96 /* TProxy original addresses */ 97 #define IP_ORIGDSTADDR 20 98 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR 99 100 #define IP_MINTTL 21 101 #define IP_NODEFRAG 22 102 #define IP_CHECKSUM 23 103 #define IP_BIND_ADDRESS_NO_PORT 24 104 #define IP_RECVFRAGSIZE 25 105 #define IP_RECVERR_RFC4884 26 106 107 /* IP_MTU_DISCOVER arguments. */ 108 #define IP_PMTUDISC_DONT 0 /* Never send DF frames. */ 109 #define IP_PMTUDISC_WANT 1 /* Use per route hints. */ 110 #define IP_PMTUDISC_DO 2 /* Always DF. */ 111 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu. */ 112 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag. 113 Also incoming ICMP frag_needed notifications will be ignored on 114 this socket to prevent accepting spoofed ones. */ 115 #define IP_PMTUDISC_INTERFACE 4 116 /* Like IP_PMTUDISC_INTERFACE but allow packets to be fragmented. */ 117 #define IP_PMTUDISC_OMIT 5 118 119 #define IP_MULTICAST_IF 32 120 #define IP_MULTICAST_TTL 33 121 #define IP_MULTICAST_LOOP 34 122 #define IP_ADD_MEMBERSHIP 35 123 #define IP_DROP_MEMBERSHIP 36 124 #define IP_UNBLOCK_SOURCE 37 125 #define IP_BLOCK_SOURCE 38 126 #define IP_ADD_SOURCE_MEMBERSHIP 39 127 #define IP_DROP_SOURCE_MEMBERSHIP 40 128 #define IP_MSFILTER 41 129 #define IP_MULTICAST_ALL 49 130 #define IP_UNICAST_IF 50 131 132 /* To select the IP level. */ 133 #define SOL_IP 0 134 135 #define IP_DEFAULT_MULTICAST_TTL 1 136 #define IP_DEFAULT_MULTICAST_LOOP 1 137 #define IP_MAX_MEMBERSHIPS 20 138 139 #ifdef __USE_MISC 140 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS. 141 The `ip_dst' field is used for the first-hop gateway when using a 142 source route (this gets put into the header proper). */ 143 struct ip_opts 144 { 145 struct in_addr ip_dst; /* First hop; zero without source route. */ 146 char ip_opts[40]; /* Actually variable in size. */ 147 }; 148 149 /* Like `struct ip_mreq' but including interface specification by index. */ 150 struct ip_mreqn 151 { 152 struct in_addr imr_multiaddr; /* IP multicast address of group */ 153 struct in_addr imr_address; /* local IP address of interface */ 154 int imr_ifindex; /* Interface index */ 155 }; 156 157 /* Structure used for IP_PKTINFO. */ 158 struct in_pktinfo 159 { 160 int ipi_ifindex; /* Interface index */ 161 struct in_addr ipi_spec_dst; /* Routing destination address */ 162 struct in_addr ipi_addr; /* Header destination address */ 163 }; 164 #endif 165 166 /* Options for use with `getsockopt' and `setsockopt' at the IPv6 level. 167 The first word in the comment at the right is the data type used; 168 "bool" means a boolean value stored in an `int'. */ 169 #define IPV6_ADDRFORM 1 170 #define IPV6_2292PKTINFO 2 171 #define IPV6_2292HOPOPTS 3 172 #define IPV6_2292DSTOPTS 4 173 #define IPV6_2292RTHDR 5 174 #define IPV6_2292PKTOPTIONS 6 175 #define IPV6_CHECKSUM 7 176 #define IPV6_2292HOPLIMIT 8 177 178 #define SCM_SRCRT IPV6_RXSRCRT 179 180 #define IPV6_NEXTHOP 9 181 #define IPV6_AUTHHDR 10 182 #define IPV6_UNICAST_HOPS 16 183 #define IPV6_MULTICAST_IF 17 184 #define IPV6_MULTICAST_HOPS 18 185 #define IPV6_MULTICAST_LOOP 19 186 #define IPV6_JOIN_GROUP 20 187 #define IPV6_LEAVE_GROUP 21 188 #define IPV6_ROUTER_ALERT 22 189 #define IPV6_MTU_DISCOVER 23 190 #define IPV6_MTU 24 191 #define IPV6_RECVERR 25 192 #define IPV6_V6ONLY 26 193 #define IPV6_JOIN_ANYCAST 27 194 #define IPV6_LEAVE_ANYCAST 28 195 #define IPV6_MULTICAST_ALL 29 196 #define IPV6_ROUTER_ALERT_ISOLATE 30 197 #define IPV6_RECVERR_RFC4884 31 198 #define IPV6_IPSEC_POLICY 34 199 #define IPV6_XFRM_POLICY 35 200 #define IPV6_HDRINCL 36 201 202 /* Advanced API (RFC3542) (1). */ 203 #define IPV6_RECVPKTINFO 49 204 #define IPV6_PKTINFO 50 205 #define IPV6_RECVHOPLIMIT 51 206 #define IPV6_HOPLIMIT 52 207 #define IPV6_RECVHOPOPTS 53 208 #define IPV6_HOPOPTS 54 209 #define IPV6_RTHDRDSTOPTS 55 210 #define IPV6_RECVRTHDR 56 211 #define IPV6_RTHDR 57 212 #define IPV6_RECVDSTOPTS 58 213 #define IPV6_DSTOPTS 59 214 #define IPV6_RECVPATHMTU 60 215 #define IPV6_PATHMTU 61 216 #define IPV6_DONTFRAG 62 217 218 /* Advanced API (RFC3542) (2). */ 219 #define IPV6_RECVTCLASS 66 220 #define IPV6_TCLASS 67 221 222 #define IPV6_AUTOFLOWLABEL 70 223 224 /* RFC5014. */ 225 #define IPV6_ADDR_PREFERENCES 72 226 227 /* RFC5082. */ 228 #define IPV6_MINHOPCOUNT 73 229 230 #define IPV6_ORIGDSTADDR 74 231 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR 232 #define IPV6_TRANSPARENT 75 233 #define IPV6_UNICAST_IF 76 234 #define IPV6_RECVFRAGSIZE 77 235 #define IPV6_FREEBIND 78 236 237 /* Obsolete synonyms for the above. */ 238 #if !__USE_KERNEL_IPV6_DEFS 239 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP 240 # define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP 241 #endif 242 #define IPV6_RXHOPOPTS IPV6_HOPOPTS 243 #define IPV6_RXDSTOPTS IPV6_DSTOPTS 244 245 /* IPV6_MTU_DISCOVER values. */ 246 #define IPV6_PMTUDISC_DONT 0 /* Never send DF frames. */ 247 #define IPV6_PMTUDISC_WANT 1 /* Use per route hints. */ 248 #define IPV6_PMTUDISC_DO 2 /* Always DF. */ 249 #define IPV6_PMTUDISC_PROBE 3 /* Ignore dst pmtu. */ 250 #define IPV6_PMTUDISC_INTERFACE 4 /* See IP_PMTUDISC_INTERFACE. */ 251 #define IPV6_PMTUDISC_OMIT 5 /* See IP_PMTUDISC_OMIT. */ 252 253 /* Socket level values for IPv6. */ 254 #define SOL_IPV6 41 255 #define SOL_ICMPV6 58 256 257 /* Routing header options for IPv6. */ 258 #define IPV6_RTHDR_LOOSE 0 /* Hop doesn't need to be neighbour. */ 259 #define IPV6_RTHDR_STRICT 1 /* Hop must be a neighbour. */ 260 261 #define IPV6_RTHDR_TYPE_0 0 /* IPv6 Routing header type 0. */ 262