sysdeps/generic/ifreq.h

   1 /* Copyright (C) 1999-2015 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <net/if.h>
  23 #include <sys/socket.h>
  24 #include <sys/ioctl.h>
  25
  26 static inline struct ifreq *
  27 __if_nextreq (struct ifreq *ifr)
  28 {
  29 #ifdef _HAVE_SA_LEN
  30   if (ifr->ifr_addr.sa_len > sizeof ifr->ifr_addr)
  31     return (struct ifreq *) ((char *) &ifr->ifr_addr + ifr->ifr_addr.sa_len);
  32 #endif
  33   return ifr + 1;
  34 }
  35
  36 extern void __ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd);
  37
  38
  39 static inline void
  40 __if_freereq (struct ifreq *ifreqs, int num_ifs)
  41 {
  42   free (ifreqs);
  43 }