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

   1 /* Copyright (C) 1991-2015 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.  The ABI used by the linux-kernel and
  27    glibc match exactly.  Neither the linux kernel nor glibc should break this
  28    ABI without coordination.  */
  29 #ifdef _UAPI_LINUX_IN6_H
  30 /* This is not quite the same API since the kernel always defines s6_addr16 and
  31    s6_addr32. This is not a violation of POSIX since POSIX says "at least the
  32    following member" and that holds true.  */
  33 # define __USE_KERNEL_IPV6_DEFS
  34 #endif
  35
  36 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
  37    The first word in the comment at the right is the data type used;
  38    "bool" means a boolean value stored in an `int'.  */
  39 #define        IP_OPTIONS      4       /* ip_opts; IP per-packet options.  */
  40 #define        IP_HDRINCL      3       /* int; Header is included with data.  */
  41 #define        IP_TOS          1       /* int; IP type of service and precedence.  */
  42 #define        IP_TTL          2       /* int; IP time to live.  */
  43 #define        IP_RECVOPTS     6       /* bool; Receive all IP options w/datagram.  */
  44 /* For BSD compatibility.  */
  45 #define        IP_RECVRETOPTS  IP_RETOPTS       /* bool; Receive IP options for response.  */
  46 #define        IP_RETOPTS      7       /* ip_opts; Set/get IP per-packet options.  */
  47 #define IP_MULTICAST_IF 32      /* in_addr; set/get IP multicast i/f */
  48 #define IP_MULTICAST_TTL 33     /* u_char; set/get IP multicast ttl */
  49 #define IP_MULTICAST_LOOP 34    /* i_char; set/get IP multicast loopback */
  50 #define IP_ADD_MEMBERSHIP 35    /* ip_mreq; add an IP group membership */
  51 #define IP_DROP_MEMBERSHIP 36   /* ip_mreq; drop an IP group membership */
  52 #define IP_UNBLOCK_SOURCE 37    /* ip_mreq_source: unblock data from source */
  53 #define IP_BLOCK_SOURCE 38      /* ip_mreq_source: block data from source */
  54 #define IP_ADD_SOURCE_MEMBERSHIP 39 /* ip_mreq_source: join source group */
  55 #define IP_DROP_SOURCE_MEMBERSHIP 40 /* ip_mreq_source: leave source group */
  56 #define IP_MSFILTER 41
  57 #ifdef __USE_MISC
  58 # define MCAST_JOIN_GROUP 42    /* group_req: join any-source group */
  59 # define MCAST_BLOCK_SOURCE 43  /* group_source_req: block from given group */
  60 # define MCAST_UNBLOCK_SOURCE 44 /* group_source_req: unblock from given group*/
  61 # define MCAST_LEAVE_GROUP 45   /* group_req: leave any-source group */
  62 # define MCAST_JOIN_SOURCE_GROUP 46 /* group_source_req: join source-spec gr */
  63 # define MCAST_LEAVE_SOURCE_GROUP 47 /* group_source_req: leave source-spec gr*/
  64 # define MCAST_MSFILTER 48
  65 # define IP_MULTICAST_ALL 49
  66 # define IP_UNICAST_IF 50
  67
  68 # define MCAST_EXCLUDE   0
  69 # define MCAST_INCLUDE   1
  70 #endif
  71
  72 #define IP_ROUTER_ALERT 5       /* bool */
  73 #define IP_PKTINFO      8       /* bool */
  74 #define IP_PKTOPTIONS   9
  75 #define IP_PMTUDISC     10      /* obsolete name? */
  76 #define IP_MTU_DISCOVER 10      /* int; see below */
  77 #define IP_RECVERR      11      /* bool */
  78 #define IP_RECVTTL      12      /* bool */
  79 #define IP_RECVTOS      13      /* bool */
  80 #define IP_MTU          14      /* int */
  81 #define IP_FREEBIND     15
  82 #define IP_IPSEC_POLICY 16
  83 #define IP_XFRM_POLICY  17
  84 #define IP_PASSSEC      18
  85 #define IP_TRANSPARENT  19
  86 #define IP_MULTICAST_ALL 49     /* bool */
  87
  88 /* TProxy original addresses */
  89 #define IP_ORIGDSTADDR       20
  90 #define IP_RECVORIGDSTADDR   IP_ORIGDSTADDR
  91
  92 #define IP_MINTTL       21
  93 #define IP_NODEFRAG     22
  94
  95 /* IP_MTU_DISCOVER arguments.  */
  96 #define IP_PMTUDISC_DONT   0    /* Never send DF frames.  */
  97 #define IP_PMTUDISC_WANT   1    /* Use per route hints.  */
  98 #define IP_PMTUDISC_DO     2    /* Always DF.  */
  99 #define IP_PMTUDISC_PROBE  3    /* Ignore dst pmtu.  */
 100 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
 101    Also incoming ICMP frag_needed notifications will be ignored on
 102    this socket to prevent accepting spoofed ones.  */
 103 #define IP_PMTUDISC_INTERFACE           4
 104 /* Like IP_PMTUDISC_INTERFACE but allow packets to be fragmented.  */
 105 #define IP_PMTUDISC_OMIT                5
 106
 107 #define IP_MULTICAST_IF                 32
 108 #define IP_MULTICAST_TTL                33
 109 #define IP_MULTICAST_LOOP               34
 110 #define IP_ADD_MEMBERSHIP               35
 111 #define IP_DROP_MEMBERSHIP              36
 112 #define IP_UNBLOCK_SOURCE               37
 113 #define IP_BLOCK_SOURCE                 38
 114 #define IP_ADD_SOURCE_MEMBERSHIP        39
 115 #define IP_DROP_SOURCE_MEMBERSHIP       40
 116 #define IP_MSFILTER                     41
 117 #define MCAST_JOIN_GROUP                42
 118 #define MCAST_BLOCK_SOURCE              43
 119 #define MCAST_UNBLOCK_SOURCE            44
 120 #define MCAST_LEAVE_GROUP               45
 121 #define MCAST_JOIN_SOURCE_GROUP         46
 122 #define MCAST_LEAVE_SOURCE_GROUP        47
 123 #define MCAST_MSFILTER                  48
 124 #define IP_MULTICAST_ALL                49
 125 #define IP_UNICAST_IF                   50
 126
 127 /* To select the IP level.  */
 128 #define SOL_IP  0
 129
 130 #define IP_DEFAULT_MULTICAST_TTL        1
 131 #define IP_DEFAULT_MULTICAST_LOOP       1
 132 #define IP_MAX_MEMBERSHIPS              20
 133
 134 #ifdef __USE_MISC
 135 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
 136    The `ip_dst' field is used for the first-hop gateway when using a
 137    source route (this gets put into the header proper).  */
 138 struct ip_opts
 139   {
 140     struct in_addr ip_dst;      /* First hop; zero without source route.  */
 141     char ip_opts[40];           /* Actually variable in size.  */
 142   };
 143
 144 /* Like `struct ip_mreq' but including interface specification by index.  */
 145 struct ip_mreqn
 146   {
 147     struct in_addr imr_multiaddr;       /* IP multicast address of group */
 148     struct in_addr imr_address;         /* local IP address of interface */
 149     int imr_ifindex;                    /* Interface index */
 150   };
 151
 152 /* Structure used for IP_PKTINFO.  */
 153 struct in_pktinfo
 154   {
 155     int ipi_ifindex;                    /* Interface index  */
 156     struct in_addr ipi_spec_dst;        /* Routing destination address  */
 157     struct in_addr ipi_addr;            /* Header destination address  */
 158   };
 159 #endif
 160
 161 /* Options for use with `getsockopt' and `setsockopt' at the IPv6 level.
 162    The first word in the comment at the right is the data type used;
 163    "bool" means a boolean value stored in an `int'.  */
 164 #define IPV6_ADDRFORM           1
 165 #define IPV6_2292PKTINFO        2
 166 #define IPV6_2292HOPOPTS        3
 167 #define IPV6_2292DSTOPTS        4
 168 #define IPV6_2292RTHDR          5
 169 #define IPV6_2292PKTOPTIONS     6
 170 #define IPV6_CHECKSUM           7
 171 #define IPV6_2292HOPLIMIT       8
 172
 173 #define SCM_SRCRT               IPV6_RXSRCRT
 174
 175 #define IPV6_NEXTHOP            9
 176 #define IPV6_AUTHHDR            10
 177 #define IPV6_UNICAST_HOPS       16
 178 #define IPV6_MULTICAST_IF       17
 179 #define IPV6_MULTICAST_HOPS     18
 180 #define IPV6_MULTICAST_LOOP     19
 181 #define IPV6_JOIN_GROUP         20
 182 #define IPV6_LEAVE_GROUP        21
 183 #define IPV6_ROUTER_ALERT       22
 184 #define IPV6_MTU_DISCOVER       23
 185 #define IPV6_MTU                24
 186 #define IPV6_RECVERR            25
 187 #define IPV6_V6ONLY             26
 188 #define IPV6_JOIN_ANYCAST       27
 189 #define IPV6_LEAVE_ANYCAST      28
 190 #define IPV6_IPSEC_POLICY       34
 191 #define IPV6_XFRM_POLICY        35
 192
 193 #define IPV6_RECVPKTINFO        49
 194 #define IPV6_PKTINFO            50
 195 #define IPV6_RECVHOPLIMIT       51
 196 #define IPV6_HOPLIMIT           52
 197 #define IPV6_RECVHOPOPTS        53
 198 #define IPV6_HOPOPTS            54
 199 #define IPV6_RTHDRDSTOPTS       55
 200 #define IPV6_RECVRTHDR          56
 201 #define IPV6_RTHDR              57
 202 #define IPV6_RECVDSTOPTS        58
 203 #define IPV6_DSTOPTS            59
 204
 205 #define IPV6_RECVTCLASS         66
 206 #define IPV6_TCLASS             67
 207
 208 /* Obsolete synonyms for the above.  */
 209 #define IPV6_ADD_MEMBERSHIP     IPV6_JOIN_GROUP
 210 #define IPV6_DROP_MEMBERSHIP    IPV6_LEAVE_GROUP
 211 #define IPV6_RXHOPOPTS          IPV6_HOPOPTS
 212 #define IPV6_RXDSTOPTS          IPV6_DSTOPTS
 213
 214 /* IPV6_MTU_DISCOVER values.  */
 215 #define IPV6_PMTUDISC_DONT      0       /* Never send DF frames.  */
 216 #define IPV6_PMTUDISC_WANT      1       /* Use per route hints.  */
 217 #define IPV6_PMTUDISC_DO        2       /* Always DF.  */
 218 #define IPV6_PMTUDISC_PROBE     3       /* Ignore dst pmtu.  */
 219 #define IPV6_PMTUDISC_INTERFACE 4       /* See IP_PMTUDISC_INTERFACE.  */
 220 #define IPV6_PMTUDISC_OMIT      5       /* See IP_PMTUDISC_OMIT.  */
 221
 222 /* Socket level values for IPv6.  */
 223 #define SOL_IPV6        41
 224 #define SOL_ICMPV6      58
 225
 226 /* Routing header options for IPv6.  */
 227 #define IPV6_RTHDR_LOOSE        0       /* Hop doesn't need to be neighbour. */
 228 #define IPV6_RTHDR_STRICT       1       /* Hop must be a neighbour.  */
 229
 230 #define IPV6_RTHDR_TYPE_0       0       /* IPv6 Routing header type 0.  */