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

   1 /* Copyright (C) 1991-1999, 2000, 2004 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /* Linux version.  */
  20
  21 #ifndef _NETINET_IN_H
  22 # error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
  23 #endif
  24
  25 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
  26    The first word in the comment at the right is the data type used;
  27    "bool" means a boolean value stored in an `int'.  */
  28 #define        IP_OPTIONS      4       /* ip_opts; IP per-packet options.  */
  29 #define        IP_HDRINCL      3       /* int; Header is included with data.  */
  30 #define        IP_TOS          1       /* int; IP type of service and precedence.  */
  31 #define        IP_TTL          2       /* int; IP time to live.  */
  32 #define        IP_RECVOPTS     6       /* bool; Receive all IP options w/datagram.  */
  33 /* For BSD compatibility.  */
  34 #define        IP_RECVRETOPTS  IP_RETOPTS       /* bool; Receive IP options for response.  */
  35 #define        IP_RETOPTS      7       /* ip_opts; Set/get IP per-packet options.  */
  36 #define IP_MULTICAST_IF 32      /* in_addr; set/get IP multicast i/f */
  37 #define IP_MULTICAST_TTL 33     /* u_char; set/get IP multicast ttl */
  38 #define IP_MULTICAST_LOOP 34    /* i_char; set/get IP multicast loopback */
  39 #define IP_ADD_MEMBERSHIP 35    /* ip_mreq; add an IP group membership */
  40 #define IP_DROP_MEMBERSHIP 36   /* ip_mreq; drop an IP group membership */
  41 #define IP_UNBLOCK_SOURCE 37    /* ip_mreq_source: unblock data from source */
  42 #define IP_BLOCK_SOURCE 38      /* ip_mreq_source: block data from source */
  43 #define IP_ADD_SOURCE_MEMBERSHIP 39 /* ip_mreq_source: join source group */
  44 #define IP_DROP_SOURCE_MEMBERSHIP 40 /* ip_mreq_source: leave source group */
  45 #define IP_MSFILTER 41
  46 #define MCAST_JOIN_GROUP 42     /* group_req: join any-source group */
  47 #define MCAST_BLOCK_SOURCE 43   /* group_source_req: block from given group */
  48 #define MCAST_UNBLOCK_SOURCE 44 /* group_source_req: unblock from given group*/
  49 #define MCAST_LEAVE_GROUP 45    /* group_req: leave any-source group */
  50 #define MCAST_JOIN_SOURCE_GROUP 46 /* group_source_req: join source-spec gr */
  51 #define MCAST_LEAVE_SOURCE_GROUP 47 /* group_source_req: leave source-spec gr*/
  52 #define MCAST_MSFILTER 48
  53
  54 #define MCAST_EXCLUDE   0
  55 #define MCAST_INCLUDE   1
  56
  57 #define IP_ROUTER_ALERT    5    /* bool */
  58 #define IP_PKTINFO         8    /* bool */
  59 #define IP_PKTOPTIONS      9
  60 #define IP_PMTUDISC        10   /* obsolete name? */
  61 #define IP_MTU_DISCOVER    10   /* int; see below */
  62 #define IP_RECVERR         11   /* bool */
  63 #define IP_RECVTTL         12   /* bool */
  64 #define IP_RECVTOS         13   /* bool */
  65
  66
  67 /* IP_MTU_DISCOVER arguments.  */
  68 #define IP_PMTUDISC_DONT   0    /* Never send DF frames.  */
  69 #define IP_PMTUDISC_WANT   1    /* Use per route hints.  */
  70 #define IP_PMTUDISC_DO     2    /* Always DF.  */
  71
  72 /* To select the IP level.  */
  73 #define SOL_IP  0
  74
  75 #define IP_DEFAULT_MULTICAST_TTL        1
  76 #define IP_DEFAULT_MULTICAST_LOOP       1
  77 #define IP_MAX_MEMBERSHIPS              20
  78
  79 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
  80    The `ip_dst' field is used for the first-hop gateway when using a
  81    source route (this gets put into the header proper).  */
  82 struct ip_opts
  83   {
  84     struct in_addr ip_dst;      /* First hop; zero without source route.  */
  85     char ip_opts[40];           /* Actually variable in size.  */
  86   };
  87
  88 /* Like `struct ip_mreq' but including interface specification by index.  */
  89 struct ip_mreqn
  90   {
  91     struct in_addr imr_multiaddr;       /* IP multicast address of group */
  92     struct in_addr imr_address;         /* local IP address of interface */
  93     int imr_ifindex;                    /* Interface index */
  94   };
  95
  96 /* Structure used for IP_PKTINFO.  */
  97 struct in_pktinfo
  98   {
  99     int ipi_ifindex;                    /* Interface index  */
 100     struct in_addr ipi_spec_dst;        /* Routing destination address  */
 101     struct in_addr ipi_addr;            /* Header destination address  */
 102   };
 103
 104 /* Options for use with `getsockopt' and `setsockopt' at the IPv6 level.
 105    The first word in the comment at the right is the data type used;
 106    "bool" means a boolean value stored in an `int'.  */
 107 #define IPV6_ADDRFORM           1
 108 #define IPV6_PKTINFO            2
 109 #define IPV6_HOPOPTS            3
 110 #define IPV6_DSTOPTS            4
 111 #define IPV6_RTHDR              5
 112 #define IPV6_PKTOPTIONS         6
 113 #define IPV6_CHECKSUM           7
 114 #define IPV6_HOPLIMIT           8
 115
 116 #define SCM_SRCRT               IPV6_RXSRCRT
 117
 118 #define IPV6_NEXTHOP            9
 119 #define IPV6_AUTHHDR            10
 120 #define IPV6_UNICAST_HOPS       16
 121 #define IPV6_MULTICAST_IF       17
 122 #define IPV6_MULTICAST_HOPS     18
 123 #define IPV6_MULTICAST_LOOP     19
 124 #define IPV6_JOIN_GROUP         20
 125 #define IPV6_LEAVE_GROUP        21
 126 #define IPV6_ROUTER_ALERT       22
 127 #define IPV6_MTU_DISCOVER       23
 128 #define IPV6_MTU                24
 129 #define IPV6_RECVERR            25
 130 #define IPV6_V6ONLY             26
 131 #define IPV6_JOIN_ANYCAST       27
 132 #define IPV6_LEAVE_ANYCAST      28
 133 #define IPV6_IPSEC_POLICY       34
 134 #define IPV6_XFRM_POLICY        35
 135
 136 /* Obsolete synonyms for the above.  */
 137 #define IPV6_ADD_MEMBERSHIP     IPV6_JOIN_GROUP
 138 #define IPV6_DROP_MEMBERSHIP    IPV6_LEAVE_GROUP
 139 #define IPV6_RXHOPOPTS          IPV6_HOPOPTS
 140 #define IPV6_RXDSTOPTS          IPV6_DSTOPTS
 141
 142 /* IPV6_MTU_DISCOVER values.  */
 143 #define IPV6_PMTUDISC_DONT      0       /* Never send DF frames.  */
 144 #define IPV6_PMTUDISC_WANT      1       /* Use per route hints.  */
 145 #define IPV6_PMTUDISC_DO        2       /* Always DF.  */
 146
 147 /* Socket level values for IPv6.  */
 148 #define SOL_IPV6        41
 149 #define SOL_ICMPV6      58
 150
 151 /* Routing header options for IPv6.  */
 152 #define IPV6_RTHDR_LOOSE        0       /* Hop doesn't need to be neighbour. */
 153 #define IPV6_RTHDR_STRICT       1       /* Hop must be a neighbour.  */
 154
 155 #define IPV6_RTHDR_TYPE_0       0       /* IPv6 Routing header type 0.  */