check snprintf return value for error

2016-12-20 22:18:21 +00:00 · 2016-12-20 22:18:21 +00:00 · bf6eeff75a
parent 6ae959e051
commit bf6eeff75a
1 changed files with 1 additions and 1 deletions
--- a/src/core.c
+++ b/src/core.c
@ -244,7 +244,7 @@ static int tunnel_to(int sock, ip_type ip, unsigned short port, proxy_type pt, c
 			                ulen ? "Proxy-Authorization: Basic " : dst,
 			                dst, ulen ? "\r\n" : dst);

-			if(len != send(sock, buff, len, 0))
+			if(len < 0 || len != send(sock, buff, len, 0))
 				goto err;

 			len = 0;