36 lines
1.4 KiB
C
36 lines
1.4 KiB
C
/* Copyright (C) 2005 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sys/param.h>
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#include <sys/socket.h>
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ssize_t
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__recvfrom_chk (int fd, void *buf, size_t n, size_t buflen, int flags,
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__SOCKADDR_ARG addr, socklen_t *addr_len)
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{
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/* In case N is greater than BUFLEN, we read BUFLEN+1 bytes.
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This might overflow the buffer but the damage is reduced to just
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one byte. And the program will terminate right away. */
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ssize_t nrecv = __recvfrom (fd, buf, MIN (n, buflen + 1), flags,
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addr, addr_len);
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if (nrecv > 0 && (size_t) nrecv > buflen)
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__chk_fail ();
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return nrecv;
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}
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