Improve error message on healthcheck faiure

Author: ekzhang

cmd/connect.go

@@ -92,7 +92,7 @@ func runConnect(cmd *cobra.Command, args []string) error {
 
 	log.Println("Connected...")
 	if !client.CheckConnection(healthCheckTimeout, ctx) {
-		return fmt.Errorf("connection immediately turned bad after connecting: %v", err)
+		return fmt.Errorf("connection failed initial healthcheck after %v", healthCheckTimeout)
 	}
 
 	for {

lib/client.go

@@ -93,7 +93,7 @@ func (c *Client) updateInterface(resp connectResponse) error {
 	if cidr != c.wgCidr {
 		link := c.link()
 
-		if c.wgCidr != (netip.Prefix{}) {
+		if c.wgCidr.IsValid() {
 			oldIpnet := prefixToIPNet(c.wgCidr)
 			err = netlink.AddrDel(link, &netlink.Addr{IPNet: &oldIpnet})