bits/in.h

   1 /* Copyright (C) 1997-2015 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 /* Generic version.  */
  19
  20 #ifndef _NETINET_IN_H
  21 # error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
  22 #endif
  23
  24 /* To select the IP level.  */
  25 #define SOL_IP          0
  26
  27 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
  28    The first word in the comment at the right is the data type used;
  29    "bool" means a boolean value stored in an `int'.  */
  30 #define IP_OPTIONS      1       /* ip_opts; IP per-packet options.  */
  31 #define IP_HDRINCL      2       /* int; Header is included with data.  */
  32 #define IP_TOS          3       /* int; IP type of service and precedence.  */
  33 #define IP_TTL          4       /* int; IP time to live.  */
  34 #define IP_RECVOPTS     5       /* bool; Receive all IP options w/datagram.  */
  35 #define IP_RECVRETOPTS  6       /* bool; Receive IP options for response.  */
  36 #define IP_RECVDSTADDR  7       /* bool; Receive IP dst addr w/datagram.  */
  37 #define IP_RETOPTS      8       /* ip_opts; Set/get IP per-packet options.  */
  38 #define IP_MULTICAST_IF 9       /* in_addr; set/get IP multicast i/f */
  39 #define IP_MULTICAST_TTL 10     /* u_char; set/get IP multicast ttl */
  40 #define IP_MULTICAST_LOOP 11    /* i_char; set/get IP multicast loopback */
  41 #define IP_ADD_MEMBERSHIP 12    /* ip_mreq; add an IP group membership */
  42 #define IP_DROP_MEMBERSHIP 13   /* ip_mreq; drop an IP group membership */
  43
  44 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
  45    The `ip_dst' field is used for the first-hop gateway when using a
  46    source route (this gets put into the header proper).  */
  47 struct ip_opts
  48   {
  49     struct in_addr ip_dst;      /* First hop; zero without source route.  */
  50     char ip_opts[40];           /* Actually variable in size.  */
  51   };
  52
  53 /* Socket-level values for IPv6.  */
  54 #define SOL_IPV6                41
  55 #define SOL_ICMPV6              58
  56
  57 /* IPV6 socket options.  */
  58 #define IPV6_ADDRFORM           1
  59 #define IPV6_PKTINFO            2
  60 #define IPV6_HOPOPTS            3
  61 #define IPV6_DSTOPTS            4
  62 #define IPV6_RTHDR              5
  63 #define IPV6_PKTOPTIONS         6
  64 #define IPV6_CHECKSUM           7
  65 #define IPV6_HOPLIMIT           8
  66
  67 #define IPV6_RXINFO             IPV6_PKTINFO
  68 #define IPV6_TXINFO             IPV6_PKTINFO
  69 #define SCM_SRCINFO             IPV6_PKTINFO
  70 #define SCM_SRCRT               IPV6_RXSRCRT
  71
  72 #define IPV6_UNICAST_HOPS       16
  73 #define IPV6_MULTICAST_IF       17
  74 #define IPV6_MULTICAST_HOPS     18
  75 #define IPV6_MULTICAST_LOOP     19
  76 #define IPV6_JOIN_GROUP         20
  77 #define IPV6_LEAVE_GROUP        21
  78 #define IPV6_ROUTER_ALERT      22
  79 #define IPV6_MTU_DISCOVER      23
  80 #define IPV6_MTU               24
  81 #define IPV6_RECVERR           25
  82 #define IPV6_V6ONLY            26
  83 #define IPV6_JOIN_ANYCAST      27
  84 #define IPV6_LEAVE_ANYCAST     28
  85
  86 /* Obsolete synonyms for the above.  */
  87 #define IPV6_ADD_MEMBERSHIP     IPV6_JOIN_GROUP
  88 #define IPV6_DROP_MEMBERSHIP    IPV6_LEAVE_GROUP
  89 #define IPV6_RXHOPOPTS          IPV6_HOPOPTS
  90 #define IPV6_RXDSTOPTS          IPV6_DSTOPTS
  91
  92 /* Routing header options for IPv6.  */
  93 #define IPV6_RTHDR_LOOSE        0       /* Hop doesn't need to be neighbour. */
  94 #define IPV6_RTHDR_STRICT       1       /* Hop must be a neighbour.  */
  95
  96 #define IPV6_RTHDR_TYPE_0       0       /* IPv6 Routing header type 0.  */