connecting to dynamic dns

Nikos Mavrogiannopoulos nmav at
Fri Nov 28 23:29:15 PST 2014

When connecting to an IP which is dynamic, it may often change and
require a reconnection. However, cstp_reconnect() will attempt to
connect to the cached IP and never fallback. The attached patch fixes
the issue for me, but what would be the best approach?
1. Don't cache the IP at all
2. Add an openconnect flag and API call for dynamic IPs

The second sounds like more generic but I think it complicates the API
and the application quite a lot.


-------------- next part --------------
diff --git a/cstp.c b/cstp.c
index b1235ef..05c3444 100644
--- a/cstp.c
+++ b/cstp.c
@@ -591,6 +591,8 @@ static int cstp_reconnect(struct openconnect_info *vpninfo)
 	timeout = vpninfo->reconnect_timeout;
 	interval = vpninfo->reconnect_interval;
+	free(vpninfo->peer_addr); 
+	vpninfo->peer_addr = NULL;
 	while ((ret = openconnect_make_cstp_connection(vpninfo))) {
 		if (timeout <= 0)
 			return ret;
@@ -611,6 +613,8 @@ static int cstp_reconnect(struct openconnect_info *vpninfo)
 		interval += vpninfo->reconnect_interval;
 		if (interval > RECONNECT_INTERVAL_MAX)
+		free(vpninfo->peer_addr); 
+		vpninfo->peer_addr = NULL;
 	script_config_tun(vpninfo, "reconnect");
 	return 0;

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