From: Cheoleun Moon <chleun.moon@samsung.com>
Date: Tue, 11 May 2021 10:10:22 +0000 (+0900)
Subject: Use memmove to prevent memory overlapping
X-Git-Tag: submit/tizen/20210512.020301^0
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=db7b068b863424cae790e50a92f0e4a3bbb83b32;p=platform%2Fcore%2Fapi%2Fvine.git

Use memmove to prevent memory overlapping

Change-Id: I1d7b95a72327b8d86a8b353b4dab0879ed59ee1d
Signed-off-by: Cheoleun Moon <chleun.moon@samsung.com>
---

diff --git a/plugins/libwebsockets/libwebsockets-plugin.cpp b/plugins/libwebsockets/libwebsockets-plugin.cpp
index 3c10534..9ae9149 100755
--- a/plugins/libwebsockets/libwebsockets-plugin.cpp
+++ b/plugins/libwebsockets/libwebsockets-plugin.cpp
@@ -160,7 +160,10 @@ static void _get_peer_network_info(struct lws *wsi,
 		inet_ntop(AF_INET6, &s->sin6_addr, ip, INET6_ADDRSTRLEN);
 		if (__is_ipv4_mapped(ip)) {
 			int ip_len = strlen(ip) - IPV4_MAPPED_IPv6_PREFIX_LEN;
-			strncpy(ip, ip + IPV4_MAPPED_IPv6_PREFIX_LEN, ip_len);
+			if (ip_len < 0)
+				ip_len = 0;
+			else
+				memmove(ip, ip + IPV4_MAPPED_IPv6_PREFIX_LEN, ip_len);
 			ip[ip_len] = 0;
 			*family = VINE_DP_IPV4;
 		}