From 489aa29d623782c2c4045065ef1a22a07af921af Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Fri, 6 Aug 2004 04:56:04 +0000 Subject: Update. * inet/netinet/in.h: Define struct ip_msfilter, IP_MSFILTER_SIZE, struct group_filter, and GROUP_FILTER_SIZE. * include/sys/socket.h: Declare __getsockopt. * sysdeps/unix/sysv/linux/setipv4sourcefilter.c: New file. * sysdeps/unix/sysv/linux/getipv4sourcefilter.c: New file. * sysdeps/unix/sysv/linux/setsourcefilter.c: New file. * sysdeps/unix/sysv/linux/getsourcefilter.c: New file. --- sysdeps/unix/sysv/linux/getipv4sourcefilter.c | 71 +++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/getipv4sourcefilter.c (limited to 'sysdeps/unix/sysv/linux/getipv4sourcefilter.c') diff --git a/sysdeps/unix/sysv/linux/getipv4sourcefilter.c b/sysdeps/unix/sysv/linux/getipv4sourcefilter.c new file mode 100644 index 0000000000..7fad6a7c82 --- /dev/null +++ b/sysdeps/unix/sysv/linux/getipv4sourcefilter.c @@ -0,0 +1,71 @@ +/* Get IPv4 source filter. Linux version. + Copyright (C) 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 2004. + + 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. */ + +#include +#include +#include +#include +#include +#include + + +int +getipv4sourcefilter (int s, struct in_addr interface, struct in_addr group, + uint32_t *fmode, uint32_t *numsrc, struct in_addr *slist) +{ + /* We have to create an struct ip_msfilter object which we can pass + to the kernel. */ + socklen_t needed = IP_MSFILTER_SIZE (*numsrc); + int use_malloc = __libc_use_alloca (needed); + + struct ip_msfilter *imsf; + if (use_malloc) + { + imsf = (struct ip_msfilter *) malloc (needed); + if (imsf == NULL) + return -1; + } + else + imsf = (struct ip_msfilter *) alloca (needed); + + imsf->imsf_multiaddr = group; + imsf->imsf_interface = interface; + + int result = __getsockopt (s, SOL_IP, IP_MSFILTER, imsf, &needed); + + /* If successful, copy the results to the places the caller wants + them in. */ + if (result == 0) + { + *fmode = imsf->imsf_fmode; + *numsrc = imsf->imsf_numsrc; + memcpy (slist, imsf->imsf_slist, + imsf->imsf_numsrc * sizeof (struct in_addr)); + } + + if (use_malloc) + { + int save_errno = errno; + free (imsf); + __set_errno (save_errno); + } + + return result; +} -- cgit 1.4.1