fix(publicip): abort ip data fetch if vpn context is canceled

- Prevents requesting the public IP address N times after N VPN failures
- Fetching runs with a context local to the 'single run'
- Single run writes single run result to a channel back to the caller, RunOnce is now blocking

internal/vpn/interfaces.go

@@ -89,6 +89,6 @@ type DNSLoop interface {
 }
 
 type PublicIPLoop interface {
-	StartSingleRun()
+	RunOnce(ctx context.Context) (err error)
 	ClearData() (err error)
 }

internal/vpn/tunnelup.go

@@ -29,7 +29,10 @@ func (l *Loop) onTunnelUp(ctx context.Context, data tunnelUpData) {
 		_, _ = l.dnsLooper.ApplyStatus(ctx, constants.Running)
 	}
 
-	l.publicip.StartSingleRun()
+	err := l.publicip.RunOnce(ctx)
+	if err != nil {
+		l.logger.Error("getting public IP address information: " + err.Error())
+	}
 
 	if l.versionInfo {
 		l.versionInfo = false // only get the version information once
@@ -41,7 +44,7 @@ func (l *Loop) onTunnelUp(ctx context.Context, data tunnelUpData) {
 		}
 	}
 
-	err := l.startPortForwarding(data)
+	err = l.startPortForwarding(data)
 	if err != nil {
 		l.logger.Error(err.Error())
 	}