1 files changed, 44 insertions, 0 deletions
diff --git a/source3/smbd/srvstr.c b/source3/smbd/srvstr.c
new file mode 100644
index 0000000000..409fd30a67
--- /dev/null
+++ b/source3/smbd/srvstr.c
@@ -0,0 +1,44 @@
+/* 
+   Unix SMB/CIFS implementation.
+   server specific string routines
+   Copyright (C) Andrew Tridgell 2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program 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 General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+extern int max_send;
+
+/* Make sure we can't write a string past the end of the buffer */
+
+size_t srvstr_push_fn(const char *function, unsigned int line, 
+		      const char *base_ptr, void *dest, 
+		      const char *src, int dest_len, int flags)
+{
+	size_t buf_used = PTR_DIFF(dest, base_ptr);
+	if (dest_len == -1) {
+		if (((ptrdiff_t)dest < (ptrdiff_t)base_ptr) || (buf_used > (size_t)max_send)) {
+#if 0
+			DEBUG(0, ("Pushing string of 'unlimited' length into non-SMB buffer!\n"));
+#endif
+			return push_string_fn(function, line, base_ptr, dest, src, -1, flags);
+		}
+		return push_string_fn(function, line, base_ptr, dest, src, max_send - buf_used, flags);
+	}
+	
+	/* 'normal' push into size-specified buffer */
+	return push_string_fn(function, line, base_ptr, dest, src, dest_len, flags);
+}