clean up FQDNCapability message

- we don't need hostlen and domainlen.
- use camel case.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>

api/capability.proto

@@ -94,11 +94,9 @@ message LongLivedGracefulRestartCapability {
 message RouteRefreshCiscoCapability {
 }
 
-message FQDNCapability {
-    uint32 host_name_len = 1;
-    string host_name = 2;
-    uint32 domain_name_len = 3;
-    string domain_name = 4;
+message FqdnCapability {
+    string host_name = 1;
+    string domain_name = 2;
 }
 
 message UnknownCapability {

pkg/apiutil/capability.go

@@ -109,12 +109,10 @@ func NewRouteRefreshCiscoCapability(a *bgp.CapRouteRefreshCisco) *api.RouteRefre
 	return &api.RouteRefreshCiscoCapability{}
 }
 
-func NewFQDNCapability(a *bgp.CapFQDN) *api.FQDNCapability {
-	return &api.FQDNCapability{
-		HostNameLen:   uint32(a.HostNameLen),
-		HostName:      a.HostName,
-		DomainNameLen: uint32(a.DomainNameLen),
-		DomainName:    a.DomainName,
+func NewFQDNCapability(a *bgp.CapFQDN) *api.FqdnCapability {
+	return &api.FqdnCapability{
+		HostName:   a.HostName,
+		DomainName: a.DomainName,
 	}
 }
 
@@ -237,7 +235,7 @@ func unmarshalCapability(a *apb.Any) (bgp.ParameterCapabilityInterface, error) {
 		return bgp.NewCapLongLivedGracefulRestart(tuples), nil
 	case *api.RouteRefreshCiscoCapability:
 		return bgp.NewCapRouteRefreshCisco(), nil
-	case *api.FQDNCapability:
+	case *api.FqdnCapability:
 		return bgp.NewCapFQDN(a.HostName, a.DomainName), nil
 	case *api.UnknownCapability:
 		return bgp.NewCapUnknown(bgp.BGPCapabilityCode(a.Code), a.Value), nil