refactor(win-bridge): netconf

- support v2 api
- unify v1 and v2 api

BREAKING CHANGE:
- remove `HcnPolicyArgs` field
- merge `HcnPolicyArgs` into `Policies` field

Signed-off-by: thxcode <thxcode0824@gmail.com>

plugins/main/windows/win-bridge/sample-v2.conf

@@ -0,0 +1,52 @@
+{
+    "name":"cbr0",
+    "type":"flannel",
+    "delegate":{
+        "apiVersion":2,
+        "type":"win-bridge",
+        "dns":{
+            "nameservers":[
+                "11.0.0.10"
+            ],
+            "search":[
+                "svc.cluster.local"
+            ]
+        },
+        "policies":[
+            {
+                "name":"EndpointPolicy",
+                "value":{
+                    "Type":"OutBoundNAT",
+                    "Settings":{
+                        "Exceptions":[
+                            "192.168.0.0/16",
+                            "11.0.0.0/8",
+                            "10.137.196.0/23"
+                        ]
+                    }
+                }
+            },
+            {
+                "name":"EndpointPolicy",
+                "value":{
+                    "Type":"SDNRoute",
+                    "Settings":{
+                        "DestinationPrefix":"11.0.0.0/8",
+                        "NeedEncap":true
+                    }
+                }
+            },
+            {
+                "name":"EndpointPolicy",
+                "value":{
+                    "Type":"SDNRoute",
+                    "Settings":{
+                        "DestinationPrefix":"10.137.198.27/32",
+                        "NeedEncap":true
+                    }
+                }
+            }
+        ],
+        "loopbackDSR":true
+    }
+}

plugins/main/windows/win-bridge/win-bridge_windows.go

@@ -84,9 +84,7 @@ func processEndpointArgs(args *skel.CmdArgs, n *NetConf) (*hns.EndpointInfo, err
 	}
 
 	// configure sNAT exception
-	if len(n.IPMasqNetwork) != 0 {
-		n.ApplyOutboundNatPolicy(n.IPMasqNetwork)
-	}
+	n.ApplyOutboundNatPolicy(n.IPMasqNetwork)
 
 	// add port mapping if any present
 	n.ApplyPortMappingPolicy(n.RuntimeConfig.PortMaps)

plugins/main/windows/win-overlay/win-overlay_windows.go

@@ -119,7 +119,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 
 		result.DNS = n.GetDNS()
 		if n.LoopbackDSR {
-			n.ApplyLoopbackDSR(&ipAddr)
+			n.ApplyLoopbackDSRPolicy(&ipAddr)
 		}
 		hnsEndpoint := &hcsshim.HNSEndpoint{
 			Name:           epName,
@@ -129,7 +129,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 			GatewayAddress: gw,
 			IPAddress:      ipAddr,
 			MacAddress:     macAddr,
-			Policies:       n.MarshalPolicies(),
+			Policies:       n.GetHNSEndpointPolicies(),
 		}
 
 		return hnsEndpoint, nil