sysdeps/generic/ifreq.h

   1 /* Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Andreas Jaeger <aj@suse.de>.
   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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <net/if.h>
  24 #include <sys/socket.h>
  25 #include <sys/ioctl.h>
  26
  27 static inline struct ifreq *
  28 __if_nextreq (struct ifreq *ifr)
  29 {
  30 #ifdef _HAVE_SA_LEN
  31   if (ifr->ifr_addr.sa_len > sizeof ifr->ifr_addr)
  32     return (struct ifreq *) ((char *) &ifr->ifr_addr + ifr->ifr_addr.sa_len);
  33 #endif
  34   return ifr + 1;
  35 }
  36
  37 extern void __ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd);
  38
  39
  40 static inline void
  41 __if_freereq (struct ifreq *ifreqs, int num_ifs)
  42 {
  43   free (ifreqs);
  44 }