register libnetwork API and UI with docker parent chain

This commit also brings in the ability to specify a default network and its
corresponding driver as daemon flags. This helps in existing clients to
make use of newer networking features provided by libnetwork.

Signed-off-by: Madhu Venugopal <madhu@docker.com>

api/server/server_experimental.go

@@ -0,0 +1,12 @@
+// +build experimental
+
+package server
+
+func (s *Server) registerSubRouter() {
+	httpHandler := s.daemon.NetworkApiRouter()
+
+	subrouter := s.router.PathPrefix("/v{version:[0-9.]+}/networks").Subrouter()
+	subrouter.Methods("GET", "POST", "PUT", "DELETE").HandlerFunc(httpHandler)
+	subrouter = s.router.PathPrefix("/networks").Subrouter()
+	subrouter.Methods("GET", "POST", "PUT", "DELETE").HandlerFunc(httpHandler)
+}

api/server/server_linux.go

@@ -70,6 +70,7 @@ func (s *Server) newServer(proto, addr string) ([]serverCloser, error) {
 func (s *Server) AcceptConnections(d *daemon.Daemon) {
 	// Tell the init daemon we are accepting requests
 	s.daemon = d
+	s.registerSubRouter()
 	go systemd.SdNotify("READY=1")
 	// close the lock so the listeners start accepting connections
 	select {

api/server/server_stub.go

@@ -0,0 +1,6 @@
+// +build !experimental
+
+package server
+
+func (s *Server) registerSubRouter() {
+}

api/server/server_windows.go

@@ -45,6 +45,7 @@ func (s *Server) newServer(proto, addr string) ([]serverCloser, error) {
 
 func (s *Server) AcceptConnections(d *daemon.Daemon) {
 	s.daemon = d
+	s.registerSubRouter()
 	// close the lock so the listeners start accepting connections
 	select {
 	case <-s.start: