Apply patch provided by @rain2fog in adrienverge#801

pppd → tun interface + embedded PPP code

Author: DimitriPapadopoulos

src/http.c

@@ -825,6 +825,11 @@ static int parse_xml_config(struct tunnel *tunnel, const char *buffer)
 	if (!gateway)
 		log_warn("No gateway address, using interface for routing\n");
 
+	if (tunnel->use_tun) {
+		tunnel->ipv4.ip_addr.s_addr = inet_addr(gateway);
+		tunnel->ipv4.peer_addr.s_addr = inet_addr("192.0.2.1");
+	}
+
 	// The dns search string
 	val = buffer;
 	while ((val = xml_find('<', "dns", val, 2))) {