Changes for checking the global version for modify policy version sup…

…port.

Signed-off-by: Prince Pereira <ppereira@microsoft.com>

hcn/hcn.go

@@ -264,6 +264,18 @@ func SetPolicySupported() error {
 	return platformDoesNotSupportError("SetPolicy")
 }
 
+// ModifyPolicySupported returns an error if the HCN version does not support ModifyPolicy.
+func ModifyPolicySupported() error {
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
+	if supported.ModifyPolicy {
+		return nil
+	}
+	return platformDoesNotSupportError("ModifyPolicy")
+}
+
 // VxlanPortSupported returns an error if the HCN version does not support configuring the VXLAN TCP port.
 func VxlanPortSupported() error {
 	supported, err := GetCachedSupportedFeatures()

hcn/hcnerrors.go

@@ -52,6 +52,7 @@ type ErrorCode uint32
 const (
 	ERROR_NOT_FOUND                     = ErrorCode(windows.ERROR_NOT_FOUND)
 	HCN_E_PORT_ALREADY_EXISTS ErrorCode = ErrorCode(windows.HCN_E_PORT_ALREADY_EXISTS)
+	HCN_E_NOTIMPL             ErrorCode = ErrorCode(windows.E_NOTIMPL)
 )
 
 type HcnError struct {
@@ -79,6 +80,10 @@ func IsPortAlreadyExistsError(err error) bool {
 	return CheckErrorWithCode(err, HCN_E_PORT_ALREADY_EXISTS)
 }
 
+func IsNotImplemented(err error) bool {
+	return CheckErrorWithCode(err, HCN_E_NOTIMPL)
+}
+
 func new(hr error, title string, rest string) error {
 	err := &HcnError{}
 	hcsError := hcserror.New(hr, title, rest)

hcn/hcnglobals.go

@@ -61,6 +61,8 @@ var (
 	}
 	// HNS 13.0 allows for Set Policy support
 	SetPolicyVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 13, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
+	// HNS 15.4 allows for Modify Policy support
+	ModifyPolicyVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 15, Minor: 4}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
 	// HNS 10.3 allows for VXLAN ports
 	VxlanPortVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 10, Minor: 3}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
 

hcn/hcnpolicy.go

@@ -50,6 +50,7 @@ const (
 	VxlanPort           NetworkPolicyType = "VxlanPort"
 	HostRoute           NetworkPolicyType = "HostRoute"
 	SetPolicy           NetworkPolicyType = "SetPolicy"
+	ModifyPolicy        NetworkPolicyType = "ModifyPolicy"
 	NetworkL4Proxy      NetworkPolicyType = "L4Proxy"
 	LayerConstraint     NetworkPolicyType = "LayerConstraint"
 	NetworkACL          NetworkPolicyType = "NetworkACL"

hcn/hcnsupport.go

@@ -31,6 +31,7 @@ type SupportedFeatures struct {
 	SessionAffinity          bool        `json:"SessionAffinity"`
 	IPv6DualStack            bool        `json:"IPv6DualStack"`
 	SetPolicy                bool        `json:"SetPolicy"`
+	ModifyPolicy             bool        `json:"ModifyPolicy"`
 	VxlanPort                bool        `json:"VxlanPort"`
 	L4Proxy                  bool        `json:"L4Proxy"`    // network policy that applies VFP rules to all endpoints on the network to redirect traffic
 	L4WfpProxy               bool        `json:"L4WfpProxy"` // endpoint policy that applies WFP filters to redirect traffic to/from that endpoint
@@ -109,6 +110,7 @@ func getSupportedFeatures() (SupportedFeatures, error) {
 	features.SessionAffinity = isFeatureSupported(globals.Version, SessionAffinityVersion)
 	features.IPv6DualStack = isFeatureSupported(globals.Version, IPv6DualStackVersion)
 	features.SetPolicy = isFeatureSupported(globals.Version, SetPolicyVersion)
+	features.ModifyPolicy = isFeatureSupported(globals.Version, ModifyPolicyVersion)
 	features.VxlanPort = isFeatureSupported(globals.Version, VxlanPortVersion)
 	features.L4Proxy = isFeatureSupported(globals.Version, L4ProxyPolicyVersion)
 	features.L4WfpProxy = isFeatureSupported(globals.Version, L4WfpProxyPolicyVersion)