Allow handling multiple SOCKS connections simultaneously.

Close the SOCKS connection in the same function that opens it.

client/lib/snowflake.go

@@ -25,7 +25,6 @@ func Handler(socks SocksConnector, snowflakes SnowflakeCollector) error {
 
 		return errors.New("handler: Received invalid Snowflake")
 	}
-	defer socks.Close()
 	defer snowflake.Close()
 	log.Println("---- Handler: snowflake assigned ----")
 	err := socks.Grant(&net.TCPAddr{IP: net.IPv4zero, Port: 0})

client/snowflake.go

@@ -57,10 +57,13 @@ func socksAcceptLoop(ln *pt.SocksListener, snowflakes sf.SnowflakeCollector) {
 			break
 		}
 		log.Printf("SOCKS accepted: %v", conn.Req)
-		err = sf.Handler(conn, snowflakes)
-		if err != nil {
-			log.Printf("handler error: %s", err)
-		}
+		go func() {
+			defer conn.Close()
+			err = sf.Handler(conn, snowflakes)
+			if err != nil {
+				log.Printf("handler error: %s", err)
+			}
+		}()
 	}
 }