Use system proxy settings for openvpn

1 files changed, 52 insertions, 0 deletions

diff --git a/src/de/blinkt/openvpn/ProxyDetection.java b/src/de/blinkt/openvpn/ProxyDetection.java
new file mode 100644
index 00000000..dfcfbf19
--- /dev/null
+++ b/src/de/blinkt/openvpn/ProxyDetection.java
@@ -0,0 +1,52 @@
+package de.blinkt.openvpn;
+
+import java.net.InetSocketAddress;
+import java.net.MalformedURLException;
+import java.net.Proxy;
+import java.net.ProxySelector;
+import java.net.SocketAddress;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.List;
+
+public class ProxyDetection {
+	static SocketAddress detectProxy(VpnProfile vp) {
+		// Construct a new url with https as protocol
+		try {
+			URL url = new URL(String.format("https://%s:%s",vp.mServerName,vp.mServerPort));
+			Proxy proxy = getFirstProxy(url);
+
+			if(proxy==null)
+				return null;
+			SocketAddress addr = proxy.address();
+			if (addr instanceof InetSocketAddress) {
+				return addr; 
+			}
+			
+		} catch (MalformedURLException e) {
+			OpenVPN.logError(R.string.getproxy_error,e.getLocalizedMessage());
+		} catch (URISyntaxException e) {
+			OpenVPN.logError(R.string.getproxy_error,e.getLocalizedMessage());
+		}
+		return null;
+	}
+
+	static Proxy getFirstProxy(URL url) throws URISyntaxException {
+		System.setProperty("java.net.useSystemProxies", "true");
+
+		List<Proxy> proxylist = ProxySelector.getDefault().select(url.toURI());
+
+
+		if (proxylist != null) {
+			for (Proxy proxy: proxylist) {
+				SocketAddress addr = proxy.address();
+
+				if (addr != null) {
+					return proxy;
+				}
+			}
+
+		}
+		return null;
+	}
+}
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