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328c5f650f
* timezone/antarctica: Update from tzdata2001a. * timezone/asia: Likewise. * timezone/australasia: Likewise. * timezone/backward: Likewise. * timezone/etcetera: Likewise. * timezone/europe: Likewise. * timezone/leapseconds: Likewise. * timezone/northamerica: Likewise. * timezone/southamerica: Likewise. * timezone/systemv: Likewise. * timezone/yearistype: Likewise. * timezone/zone.tab: Likewise. * timezone/tzdump.c: Update from tzcode2001a. 2001-03-15 H.J. Lu <hjl@gnu.org> * intl/Makefile: Fix a typo. 2001-03-14 David Mosberger <davidm@hpl.hp.com> * gmon/gmon.c (write_call_graph): Avoid unaligned accesses when writing arc structures. 2001-03-15 H.J. Lu <hjl@gnu.org> * elf/Makefile ($(objpfx)tst-pathopt.out): Protected against cross-compiling. 2001-03-13 Andreas Schwab <schwab@suse.de> * posix/PTESTS2C.sed: Replace literal CRs by `\r'. 2001-03-15 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/cmsg_nxthdr.c (__cmsg_nxthdr): Fix test for control message fitting into message data. Patch by James Antill <james@and.org>.
40 lines
1.6 KiB
C
40 lines
1.6 KiB
C
/* Return point to next ancillary data entry in message header.
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Copyright (C) 1997, 1998, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sys/socket.h>
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struct cmsghdr *
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__cmsg_nxthdr (struct msghdr *mhdr, struct cmsghdr *cmsg)
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{
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if ((size_t) cmsg->cmsg_len < sizeof (struct cmsghdr))
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/* The kernel header does this so there may be a reason. */
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return NULL;
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cmsg = (struct cmsghdr *) ((unsigned char *) cmsg
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+ CMSG_ALIGN (cmsg->cmsg_len));
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if ((unsigned char *) (cmsg + 1) >= ((unsigned char *) mhdr->msg_control
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+ mhdr->msg_controllen)
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|| ((unsigned char *) cmsg + CMSG_ALIGN (cmsg->cmsg_len)
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> ((unsigned char *) mhdr->msg_control + mhdr->msg_controllen)))
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/* No more entries. */
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return NULL;
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return cmsg;
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}
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