Ensure backward compatability with --docker-socket

docker/client.go

@@ -73,8 +73,11 @@ func parseDockerHost(raw string) (dockerHost, error) {
 		s = strings.TrimPrefix(s, "http://")
 		s = strings.TrimPrefix(s, "https://")
 		return dockerHost{"tcp", s}, nil
+	case strings.HasPrefix(raw, "/"):
+		// Absolute path without scheme - treat as unix socket
+		return dockerHost{"unix", raw}, nil
 	default:
-		// default fallback to unix
+		// For relative paths or other formats, also default to unix
 		return dockerHost{"unix", raw}, nil
 	}
 }
@@ -85,6 +88,13 @@ func CheckSocket(socketPath string) bool {
 	if socketPath == "" {
 		socketPath = "unix:///var/run/docker.sock"
 	}
+
+	// Ensure the socket path is properly formatted
+	if !strings.Contains(socketPath, "://") {
+		// If no scheme provided, assume unix socket
+		socketPath = "unix://" + socketPath
+	}
+
 	host, err := parseDockerHost(socketPath)
 	if err != nil {
 		logger.Debug("Invalid Docker socket path '%s': %v", socketPath, err)
@@ -149,7 +159,13 @@ func IsWithinHostNetwork(socketPath string, targetAddress string, targetPort int
 func ListContainers(socketPath string, enforceNetworkValidation bool) ([]Container, error) {
 	// Use the provided socket path or default to standard location
 	if socketPath == "" {
-		socketPath = "/var/run/docker.sock"
+		socketPath = "unix:///var/run/docker.sock"
+	}
+
+	// Ensure the socket path is properly formatted for the Docker client
+	if !strings.Contains(socketPath, "://") {
+		// If no scheme provided, assume unix socket
+		socketPath = "unix://" + socketPath
 	}
 
 	// Used to filter down containers returned to Pangolin

proxy/manager.go

@@ -325,11 +325,9 @@ func (pm *ProxyManager) handleUDPProxy(conn *gonet.UDPConn, targetAddr string) {
 			continue
 		}
 
-		// Use only the client IP as the key, not IP:port
+		clientKey := remoteAddr.String()
-		// This ensures all packets from the same client reuse the same target connection
-		clientIP := remoteAddr.(*net.UDPAddr).IP.String()
 		clientsMutex.RLock()
-		targetConn, exists := clientConns[clientIP]
+		targetConn, exists := clientConns[clientKey]
 		clientsMutex.RUnlock()
 
 		if !exists {
@@ -346,15 +344,15 @@ func (pm *ProxyManager) handleUDPProxy(conn *gonet.UDPConn, targetAddr string) {
 			}
 
 			clientsMutex.Lock()
-			clientConns[clientIP] = targetConn
+			clientConns[clientKey] = targetConn
 			clientsMutex.Unlock()
 
-			go func(clientIP string, targetConn *net.UDPConn, remoteAddr net.Addr) {
+			go func(clientKey string, targetConn *net.UDPConn, remoteAddr net.Addr) {
 				defer func() {
 					// Always clean up when this goroutine exits
 					clientsMutex.Lock()
-					if storedConn, exists := clientConns[clientIP]; exists && storedConn == targetConn {
+					if storedConn, exists := clientConns[clientKey]; exists && storedConn == targetConn {
-						delete(clientConns, clientIP)
+						delete(clientConns, clientKey)
 						targetConn.Close()
 					}
 					clientsMutex.Unlock()
@@ -374,7 +372,7 @@ func (pm *ProxyManager) handleUDPProxy(conn *gonet.UDPConn, targetAddr string) {
 						return // defer will handle cleanup
 					}
 				}
-			}(clientIP, targetConn, remoteAddr)
+			}(clientKey, targetConn, remoteAddr)
 		}
 
 		_, err = targetConn.Write(buffer[:n])
@@ -382,7 +380,7 @@ func (pm *ProxyManager) handleUDPProxy(conn *gonet.UDPConn, targetAddr string) {
 			logger.Error("Error writing to target: %v", err)
 			targetConn.Close()
 			clientsMutex.Lock()
-			delete(clientConns, clientIP)
+			delete(clientConns, clientKey)
 			clientsMutex.Unlock()
 		}
 	}