1 files changed, 35 insertions, 0 deletions
diff --git a/debug/recvfrom_chk.c b/debug/recvfrom_chk.c
new file mode 100644
index 0000000..e1b1da7
--- /dev/null
+++ b/debug/recvfrom_chk.c
@@ -0,0 +1,35 @@
+/* Copyright (C) 2005 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/param.h>
+#include <sys/socket.h>
+
+
+ssize_t
+__recvfrom_chk (int fd, void *buf, size_t n, size_t buflen, int flags,
+		__SOCKADDR_ARG addr, socklen_t *addr_len)
+{
+  /* In case N is greater than BUFLEN, we read BUFLEN+1 bytes.
+     This might overflow the buffer but the damage is reduced to just
+     one byte.  And the program will terminate right away.  */
+  ssize_t nrecv = __recvfrom (fd, buf, MIN (n, buflen + 1), flags,
+			      addr, addr_len);
+  if (nrecv > 0 && (size_t) nrecv > buflen)
+    __chk_fail ();
+  return nrecv;
+}