mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 17:40:06 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
/* Return point to next ancillary data entry in message header.
|
|
Copyright (C) 1997, 1998, 2001 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. */
|
|
|
|
#include <sys/socket.h>
|
|
|
|
|
|
struct cmsghdr *
|
|
__cmsg_nxthdr (struct msghdr *mhdr, struct cmsghdr *cmsg)
|
|
{
|
|
if ((size_t) cmsg->cmsg_len < sizeof (struct cmsghdr))
|
|
/* The kernel header does this so there may be a reason. */
|
|
return NULL;
|
|
|
|
cmsg = (struct cmsghdr *) ((unsigned char *) cmsg
|
|
+ CMSG_ALIGN (cmsg->cmsg_len));
|
|
if ((unsigned char *) (cmsg + 1) >= ((unsigned char *) mhdr->msg_control
|
|
+ mhdr->msg_controllen)
|
|
|| ((unsigned char *) cmsg + CMSG_ALIGN (cmsg->cmsg_len)
|
|
> ((unsigned char *) mhdr->msg_control + mhdr->msg_controllen)))
|
|
/* No more entries. */
|
|
return NULL;
|
|
return cmsg;
|
|
}
|