bits/in.h

   1 /* Copyright (C) 1997, 2000 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 /* Generic version.  */
  20
  21 #ifndef _NETINET_IN_H
  22 # error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
  23 #endif
  24
  25 /* Link numbers.  */
  26 #define IMPLINK_IP              155
  27 #define IMPLINK_LOWEXPER        156
  28 #define IMPLINK_HIGHEXPER       158
  29
  30
  31 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
  32    The first word in the comment at the right is the data type used;
  33    "bool" means a boolean value stored in an `int'.  */
  34 #define IP_OPTIONS      1       /* ip_opts; IP per-packet options.  */
  35 #define IP_HDRINCL      2       /* int; Header is included with data.  */
  36 #define IP_TOS          3       /* int; IP type of service and precedence.  */
  37 #define IP_TTL          4       /* int; IP time to live.  */
  38 #define IP_RECVOPTS     5       /* bool; Receive all IP options w/datagram.  */
  39 #define IP_RECVRETOPTS  6       /* bool; Receive IP options for response.  */
  40 #define IP_RECVDSTADDR  7       /* bool; Receive IP dst addr w/datagram.  */
  41 #define IP_RETOPTS      8       /* ip_opts; Set/get IP per-packet options.  */
  42 #define IP_MULTICAST_IF 9       /* in_addr; set/get IP multicast i/f */
  43 #define IP_MULTICAST_TTL 10     /* u_char; set/get IP multicast ttl */
  44 #define IP_MULTICAST_LOOP 11    /* i_char; set/get IP multicast loopback */
  45 #define IP_ADD_MEMBERSHIP 12    /* ip_mreq; add an IP group membership */
  46 #define IP_DROP_MEMBERSHIP 13   /* ip_mreq; drop an IP group membership */
  47
  48 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
  49    The `ip_dst' field is used for the first-hop gateway when using a
  50    source route (this gets put into the header proper).  */
  51 struct ip_opts
  52   {
  53     struct in_addr ip_dst;      /* First hop; zero without source route.  */
  54     char ip_opts[40];           /* Actually variable in size.  */
  55   };
  56
  57 /* Structure used for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. */
  58 struct ip_mreq
  59   {
  60     struct in_addr imr_multiaddr;       /* IP multicast address of group */
  61     struct in_addr imr_interface;       /* local IP address of interface */
  62   };
  63
  64 /* IPV6 socket options.  */
  65 #define IPV6_ADDRFORM           1
  66 #define IPV6_RXINFO             2
  67 #define IPV6_RXHOPOPTS          3
  68 #define IPV6_RXDSTOPTS          4
  69 #define IPV6_RTHDR              5
  70 #define IPV6_PKTOPTIONS         6
  71 #define IPV6_CHECKSUM           7
  72 #define IPV6_HOPLIMIT           8
  73
  74 #define IPV6_TXINFO             IPV6_RXINFO
  75 #define SCM_SRCINFO             IPV6_TXINFO
  76 #define SCM_SRCRT               IPV6_RXSRCRT
  77
  78 #define IPV6_UNICAST_HOPS       16
  79 #define IPV6_MULTICAST_IF       17
  80 #define IPV6_MULTICAST_HOPS     18
  81 #define IPV6_MULTICAST_LOOP     19
  82 #define IPV6_JOIN_GROUP         20
  83 #define IPV6_LEAVE_GROUP        21
  84
  85 /* Obsolete synonyms for the above.  */
  86 #define IPV6_ADD_MEMBERSHIP     IPV6_JOIN_GROUP
  87 #define IPV6_DROP_MEMBERSHIP    IPV6_LEAVE_GROUP
  88
  89 /* Routing header options for IPv6.  */
  90 #define IPV6_RTHDR_LOOSE        0       /* Hop doesn't need to be neighbour. */
  91 #define IPV6_RTHDR_STRICT       1       /* Hop must be a neighbour.  */
  92
  93 #define IPV6_RTHDR_TYPE_0       0       /* IPv6 Routing header type 0.  */