sysdeps/unix/sysv/linux/bits/in.h

   1 /* Copyright (C) 1991-2018 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    <http://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
 106 /* IP_MTU_DISCOVER arguments.  */
 107 #define IP_PMTUDISC_DONT   0    /* Never send DF frames.  */
 108 #define IP_PMTUDISC_WANT   1    /* Use per route hints.  */
 109 #define IP_PMTUDISC_DO     2    /* Always DF.  */
 110 #define IP_PMTUDISC_PROBE  3    /* Ignore dst pmtu.  */
 111 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
 112    Also incoming ICMP frag_needed notifications will be ignored on
 113    this socket to prevent accepting spoofed ones.  */
 114 #define IP_PMTUDISC_INTERFACE           4
 115 /* Like IP_PMTUDISC_INTERFACE but allow packets to be fragmented.  */
 116 #define IP_PMTUDISC_OMIT                5
 117
 118 #define IP_MULTICAST_IF                 32
 119 #define IP_MULTICAST_TTL                33
 120 #define IP_MULTICAST_LOOP               34
 121 #define IP_ADD_MEMBERSHIP               35
 122 #define IP_DROP_MEMBERSHIP              36
 123 #define IP_UNBLOCK_SOURCE               37
 124 #define IP_BLOCK_SOURCE                 38
 125 #define IP_ADD_SOURCE_MEMBERSHIP        39
 126 #define IP_DROP_SOURCE_MEMBERSHIP       40
 127 #define IP_MSFILTER                     41
 128 #define IP_MULTICAST_ALL                49
 129 #define IP_UNICAST_IF                   50
 130
 131 /* To select the IP level.  */
 132 #define SOL_IP  0
 133
 134 #define IP_DEFAULT_MULTICAST_TTL        1
 135 #define IP_DEFAULT_MULTICAST_LOOP       1
 136 #define IP_MAX_MEMBERSHIPS              20
 137
 138 #ifdef __USE_MISC
 139 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
 140    The `ip_dst' field is used for the first-hop gateway when using a
 141    source route (this gets put into the header proper).  */
 142 struct ip_opts
 143   {
 144     struct in_addr ip_dst;      /* First hop; zero without source route.  */
 145     char ip_opts[40];           /* Actually variable in size.  */
 146   };
 147
 148 /* Like `struct ip_mreq' but including interface specification by index.  */
 149 struct ip_mreqn
 150   {
 151     struct in_addr imr_multiaddr;       /* IP multicast address of group */
 152     struct in_addr imr_address;         /* local IP address of interface */
 153     int imr_ifindex;                    /* Interface index */
 154   };
 155
 156 /* Structure used for IP_PKTINFO.  */
 157 struct in_pktinfo
 158   {
 159     int ipi_ifindex;                    /* Interface index  */
 160     struct in_addr ipi_spec_dst;        /* Routing destination address  */
 161     struct in_addr ipi_addr;            /* Header destination address  */
 162   };
 163 #endif
 164
 165 /* Options for use with `getsockopt' and `setsockopt' at the IPv6 level.
 166    The first word in the comment at the right is the data type used;
 167    "bool" means a boolean value stored in an `int'.  */
 168 #define IPV6_ADDRFORM           1
 169 #define IPV6_2292PKTINFO        2
 170 #define IPV6_2292HOPOPTS        3
 171 #define IPV6_2292DSTOPTS        4
 172 #define IPV6_2292RTHDR          5
 173 #define IPV6_2292PKTOPTIONS     6
 174 #define IPV6_CHECKSUM           7
 175 #define IPV6_2292HOPLIMIT       8
 176
 177 #define SCM_SRCRT               IPV6_RXSRCRT
 178
 179 #define IPV6_NEXTHOP            9
 180 #define IPV6_AUTHHDR            10
 181 #define IPV6_UNICAST_HOPS       16
 182 #define IPV6_MULTICAST_IF       17
 183 #define IPV6_MULTICAST_HOPS     18
 184 #define IPV6_MULTICAST_LOOP     19
 185 #define IPV6_JOIN_GROUP         20
 186 #define IPV6_LEAVE_GROUP        21
 187 #define IPV6_ROUTER_ALERT       22
 188 #define IPV6_MTU_DISCOVER       23
 189 #define IPV6_MTU                24
 190 #define IPV6_RECVERR            25
 191 #define IPV6_V6ONLY             26
 192 #define IPV6_JOIN_ANYCAST       27
 193 #define IPV6_LEAVE_ANYCAST      28
 194 #define IPV6_IPSEC_POLICY       34
 195 #define IPV6_XFRM_POLICY        35
 196 #define IPV6_HDRINCL            36
 197
 198 /* Advanced API (RFC3542) (1).  */
 199 #define IPV6_RECVPKTINFO        49
 200 #define IPV6_PKTINFO            50
 201 #define IPV6_RECVHOPLIMIT       51
 202 #define IPV6_HOPLIMIT           52
 203 #define IPV6_RECVHOPOPTS        53
 204 #define IPV6_HOPOPTS            54
 205 #define IPV6_RTHDRDSTOPTS       55
 206 #define IPV6_RECVRTHDR          56
 207 #define IPV6_RTHDR              57
 208 #define IPV6_RECVDSTOPTS        58
 209 #define IPV6_DSTOPTS            59
 210 #define IPV6_RECVPATHMTU        60
 211 #define IPV6_PATHMTU            61
 212 #define IPV6_DONTFRAG           62
 213
 214 /* Advanced API (RFC3542) (2).  */
 215 #define IPV6_RECVTCLASS         66
 216 #define IPV6_TCLASS             67
 217
 218 #define IPV6_AUTOFLOWLABEL      70
 219
 220 /* RFC5014.  */
 221 #define IPV6_ADDR_PREFERENCES   72
 222
 223 /* RFC5082.  */
 224 #define IPV6_MINHOPCOUNT        73
 225
 226 #define IPV6_ORIGDSTADDR        74
 227 #define IPV6_RECVORIGDSTADDR    IPV6_ORIGDSTADDR
 228 #define IPV6_TRANSPARENT        75
 229 #define IPV6_UNICAST_IF         76
 230 #define IPV6_RECVFRAGSIZE       77
 231 #define IPV6_FREEBIND           78
 232
 233 /* Obsolete synonyms for the above.  */
 234 #if !__USE_KERNEL_IPV6_DEFS
 235 # define IPV6_ADD_MEMBERSHIP    IPV6_JOIN_GROUP
 236 # define IPV6_DROP_MEMBERSHIP   IPV6_LEAVE_GROUP
 237 #endif
 238 #define IPV6_RXHOPOPTS          IPV6_HOPOPTS
 239 #define IPV6_RXDSTOPTS          IPV6_DSTOPTS
 240
 241 /* IPV6_MTU_DISCOVER values.  */
 242 #define IPV6_PMTUDISC_DONT      0       /* Never send DF frames.  */
 243 #define IPV6_PMTUDISC_WANT      1       /* Use per route hints.  */
 244 #define IPV6_PMTUDISC_DO        2       /* Always DF.  */
 245 #define IPV6_PMTUDISC_PROBE     3       /* Ignore dst pmtu.  */
 246 #define IPV6_PMTUDISC_INTERFACE 4       /* See IP_PMTUDISC_INTERFACE.  */
 247 #define IPV6_PMTUDISC_OMIT      5       /* See IP_PMTUDISC_OMIT.  */
 248
 249 /* Socket level values for IPv6.  */
 250 #define SOL_IPV6        41
 251 #define SOL_ICMPV6      58
 252
 253 /* Routing header options for IPv6.  */
 254 #define IPV6_RTHDR_LOOSE        0       /* Hop doesn't need to be neighbour. */
 255 #define IPV6_RTHDR_STRICT       1       /* Hop must be a neighbour.  */
 256
 257 #define IPV6_RTHDR_TYPE_0       0       /* IPv6 Routing header type 0.  */