socket/sa_len.c

   1 /* Helper for SA_LEN macro.
   2    Copyright (C) 2013-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/socket.h>
  20
  21 /* If _HAVE_SA_LEN is defined, then SA_LEN just uses sockaddr.sa_len
  22    and there is no need for a helper function.  */
  23
  24 #ifndef _HAVE_SA_LEN
  25
  26 /* All configurations have at least these two headers
  27    and their associated address families.  */
  28
  29 # include <netinet/in.h>
  30 # include <sys/un.h>
  31
  32 /* More-specific sa_len.c files #define these various HAVE_*_H
  33    macros and then #include this file.  */
  34
  35 # ifdef HAVE_NETASH_ASH_H
  36 #  include <netash/ash.h>
  37 # endif
  38 # ifdef HAVE_NETATALK_AT_H
  39 #  include <netatalk/at.h>
  40 # endif
  41 # ifdef HAVE_NETAX25_AX25_H
  42 #  include <netax25/ax25.h>
  43 # endif
  44 # ifdef HAVE_NETECONET_EC_H
  45 #  include <neteconet/ec.h>
  46 # endif
  47 # ifdef HAVE_NETIPX_IPX_H
  48 #  include <netipx/ipx.h>
  49 # endif
  50 # ifdef HAVE_NETPACKET_PACKET_H
  51 #  include <netpacket/packet.h>
  52 # endif
  53 # ifdef HAVE_NETROSE_ROSE_H
  54 #  include <netrose/rose.h>
  55 # endif
  56 # ifdef HAVE_NETIUCV_IUCV_H
  57 #  include <netiucv/iucv.h>
  58 # endif
  59
  60 int
  61 __libc_sa_len (sa_family_t af)
  62 {
  63   switch (af)
  64     {
  65 # ifdef HAVE_NETATALK_AT_H
  66     case AF_APPLETALK:
  67       return sizeof (struct sockaddr_at);
  68 # endif
  69 # ifdef HAVE_NETASH_ASH_H
  70     case AF_ASH:
  71       return sizeof (struct sockaddr_ash);
  72 # endif
  73 # ifdef HAVE_NETAX25_AX25_H
  74     case AF_AX25:
  75       return sizeof (struct sockaddr_ax25);
  76 # endif
  77 # ifdef HAVE_NETECONET_EC_H
  78     case AF_ECONET:
  79       return sizeof (struct sockaddr_ec);
  80 # endif
  81     case AF_INET:
  82       return sizeof (struct sockaddr_in);
  83     case AF_INET6:
  84       return sizeof (struct sockaddr_in6);
  85 # ifdef HAVE_NETIPX_IPX_H
  86     case AF_IPX:
  87       return sizeof (struct sockaddr_ipx);
  88 # endif
  89 # ifdef HAVE_NETIUCV_IUCV_H
  90     case AF_IUCV:
  91       return sizeof (struct sockaddr_iucv);
  92 # endif
  93     case AF_LOCAL:
  94       return sizeof (struct sockaddr_un);
  95 # ifdef HAVE_NETPACKET_PACKET_H
  96     case AF_PACKET:
  97       return sizeof (struct sockaddr_ll);
  98 # endif
  99 # ifdef HAVE_NETROSE_ROSE_H
 100     case AF_ROSE:
 101       return sizeof (struct sockaddr_rose);
 102 # endif
 103     }
 104   return 0;
 105 }
 106 libc_hidden_def (__libc_sa_len)
 107
 108 #endif  /* Not _HAVE_SA_LEN.  */