quit on interrupted sleep

Quit openconnect if sleep was interrupted by signal(e.g. ^C).

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

cstp.c

@@ -338,6 +338,8 @@ static int cstp_reconnect(struct openconnect_info *vpninfo)
 				  "sleep %ds, remain timeout %ds\n",
 				  interval, timeout);
 		sleep(interval);
+		if (killed)
+			return 1;
 		timeout -= interval;
 		interval += vpninfo->reconnect_interval;
 		if (interval > RECONNECT_INTERVAL_MAX)

mainloop.c

@@ -55,7 +55,7 @@ int queue_new_packet(struct pkt **q, int type, void *buf, int len)
 	return 0;
 }
 
-static int killed;
+int killed;
 
 static void handle_sigint(int sig)
 {

openconnect.h

@@ -213,6 +213,8 @@ void queue_packet(struct pkt **q, struct pkt *new);
 int keepalive_action(struct keepalive_info *ka, int *timeout);
 int ka_stalled_dpd_time(struct keepalive_info *ka, int *timeout);
 
+extern int killed;
+
 /* xml.c */
 int config_lookup_host(struct openconnect_info *vpninfo, const char *host);