Move some things around a bit, delete session workers

src/yggdrasil/core.go

@@ -254,6 +254,38 @@ func (c *Core) Stop() {
 	c.admin.close()
 }
 
+// Dial opens a session to the given node. The first paramter should be "nodeid"
+// and the second parameter should contain a hexadecimal representation of the
+// target node ID.
+func (c *Core) Dial(network, address string) (Conn, error) {
+	conn := Conn{}
+	nodeID := crypto.NodeID{}
+	nodeMask := crypto.NodeID{}
+	// Process
+	switch network {
+	case "nodeid":
+		// A node ID was provided - we don't need to do anything special with it
+		dest, err := hex.DecodeString(address)
+		if err != nil {
+			return Conn{}, err
+		}
+		copy(nodeID[:], dest)
+		for i := range nodeMask {
+			nodeMask[i] = 0xFF
+		}
+	default:
+		// An unexpected address type was given, so give up
+		return Conn{}, errors.New("unexpected address type")
+	}
+	conn.core = c
+	conn.nodeID = &nodeID
+	conn.nodeMask = &nodeMask
+	conn.core.router.doAdmin(func() {
+		conn.startSearch()
+	})
+	return conn, nil
+}
+
 // ListenTCP starts a new TCP listener. The input URI should match that of the
 // "Listen" configuration item, e.g.
 // 		tcp://a.b.c.d:e