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>

integration-cli/docker_api_network_test.go

@@ -0,0 +1,72 @@
+// +build experimental
+
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/go-check/check"
+)
+
+func isNetworkAvailable(c *check.C, name string) bool {
+	status, body, err := sockRequest("GET", "/networks", nil)
+	c.Assert(status, check.Equals, http.StatusOK)
+	c.Assert(err, check.IsNil)
+
+	var inspectJSON []struct {
+		Name string
+		ID   string
+		Type string
+	}
+	if err = json.Unmarshal(body, &inspectJSON); err != nil {
+		c.Fatalf("unable to unmarshal response body: %v", err)
+	}
+	for _, n := range inspectJSON {
+		if n.Name == name {
+			return true
+		}
+	}
+	return false
+
+}
+
+func (s *DockerSuite) TestNetworkApiGetAll(c *check.C) {
+	defaults := []string{"bridge", "host", "none"}
+	for _, nn := range defaults {
+		if !isNetworkAvailable(c, nn) {
+			c.Fatalf("Missing Default network : %s", nn)
+		}
+	}
+}
+
+func (s *DockerSuite) TestNetworkApiCreateDelete(c *check.C) {
+	name := "testnetwork"
+	config := map[string]interface{}{
+		"name":         name,
+		"network_type": "bridge",
+	}
+
+	status, resp, err := sockRequest("POST", "/networks", config)
+	c.Assert(status, check.Equals, http.StatusCreated)
+	c.Assert(err, check.IsNil)
+
+	if !isNetworkAvailable(c, name) {
+		c.Fatalf("Network %s not found", name)
+	}
+
+	var id string
+	err = json.Unmarshal(resp, &id)
+	if err != nil {
+		c.Fatal(err)
+	}
+
+	status, _, err = sockRequest("DELETE", fmt.Sprintf("/networks/%s", id), nil)
+	c.Assert(status, check.Equals, http.StatusOK)
+	c.Assert(err, check.IsNil)
+
+	if isNetworkAvailable(c, name) {
+		c.Fatalf("Network %s not deleted", name)
+	}
+}