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getifaddrs.h

/* ifaddrs.h -- declarations for getting network interface addresses
   Copyright (C) 2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

/**
 * 02-12-26, tim@tjansen.de: added kde_ prefix, fallback-code,
 *                           removed glibs dependencies
 */

#include "config.h"

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#include <sys/socket.h>
#include <net/if.h>

#ifdef HAVE_IFADDRS_H
#include <ifaddrs.h>

#define kde_getifaddrs(a)  getifaddrs(a)
#define kde_freeifaddrs(a) freeifaddrs(a)
#define kde_ifaddrs        ifaddrs

#else

#ifndef _GETIFADDRS_H
#define _GETIFADDRS_H


#include <sys/socket.h>

/* The `getifaddrs' function generates a linked list of these structures.
   Each element of the list describes one network interface.  */
00051 struct kde_ifaddrs
{
  struct kde_ifaddrs *ifa_next;     /* Pointer to the next structure.  */

  char *ifa_name;       /* Name of this network interface.  */
  unsigned int ifa_flags;     /* Flags as from SIOCGIFFLAGS ioctl.  */

  struct sockaddr *ifa_addr;  /* Network address of this interface.  */
  struct sockaddr *ifa_netmask; /* Netmask of this interface.  */
  union
  {
    /* At most one of the following two is valid.  If the IFF_BROADCAST
       bit is set in `ifa_flags', then `ifa_broadaddr' is valid.  If the
       IFF_POINTOPOINT bit is set, then `ifa_dstaddr' is valid.
       It is never the case that both these bits are set at once.  */
    struct sockaddr *ifu_broadaddr; /* Broadcast address of this interface. */
    struct sockaddr *ifu_dstaddr; /* Point-to-point destination address.  */
  } ifa_ifu;
  /* These very same macros are defined by <net/if.h> for `struct ifaddr'.
     So if they are defined already, the existing definitions will be fine.  */
# ifndef ifa_broadaddr
#  define ifa_broadaddr ifa_ifu.ifu_broadaddr
# endif
# ifndef ifa_dstaddr
#  define ifa_dstaddr   ifa_ifu.ifu_dstaddr
# endif

  void *ifa_data;       /* Address-specific data (may be unused).  */
};


/* Create a linked list of `struct kde_ifaddrs' structures, one for each
   network interface on the host machine.  If successful, store the
   list in *IFAP and return 0.  On errors, return -1 and set `errno'.

   The storage returned in *IFAP is allocated dynamically and can
   only be properly freed by passing it to `freeifaddrs'.  */
extern int kde_getifaddrs (struct kde_ifaddrs **__ifap);

/* Reclaim the storage allocated by a previous `getifaddrs' call.  */
extern void kde_freeifaddrs (struct kde_ifaddrs *__ifa);

#endif

#endif


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