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glibc  2.9
ifreq.h
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00001 /* Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Andreas Jaeger <aj@suse.de>.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <stdio.h>
00021 #include <stdlib.h>
00022 #include <unistd.h>
00023 #include <net/if.h>
00024 #include <sys/socket.h>
00025 #include <sys/ioctl.h>
00026 
00027 static inline struct ifreq *
00028 __if_nextreq (struct ifreq *ifr)
00029 {
00030 #ifdef _HAVE_SA_LEN
00031   if (ifr->ifr_addr.sa_len > sizeof ifr->ifr_addr)
00032     return (struct ifreq *) ((char *) &ifr->ifr_addr + ifr->ifr_addr.sa_len);
00033 #endif
00034   return ifr + 1;
00035 }
00036 
00037 extern void __ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd);
00038 
00039 
00040 static inline void
00041 __if_freereq (struct ifreq *ifreqs, int num_ifs)
00042 {
00043   free (ifreqs);
00044 }