From: Mark Spencer <markster@digium.com>
Date: Fri, 15 Aug 2003 18:50:49 +0000 (+0000)
Subject: Make sure strncat is > 0
X-Git-Tag: 0.5.0~155
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=3e211c91a209fd87357e441b33d5e71132010cb3;p=thirdparty%2Fasterisk.git

Make sure strncat is > 0


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1341 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index fd5971e0f3..e1727dea98 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -3720,9 +3720,13 @@ static int check_user(struct sip_pvt *p, struct sip_request *req, char *cmd, cha
 static int get_msg_text(char *buf, int len, struct sip_request *req)
 {
 	int x;
+	int y;
 	strcpy(buf, "");
+	y = len - strlen(buf) - 5;
+	if (y < 0)
+		y = 0;
 	for (x=0;x<req->lines;x++) {
-		strncat(buf, req->line[x], len - strlen(buf) - 5);
+		strncat(buf, req->line[x], y);
 		strcat(buf, "\n");
 	}
 	return 0;