[#311] services/control: Define NetmapSnapshot rpc

Add NetmapSnapshot rpc to ControlService protobuf definition. Recompile
proto files. Add required method to server structure.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/services/control/server/netmap_snapshot.go

@@ -0,0 +1,12 @@
+package control
+
+import (
+	"context"
+
+	"github.com/nspcc-dev/neofs-node/pkg/services/control"
+)
+
+// NetmapSnapshot reads network map snapshot from Netmap storage.
+func (s *Server) NetmapSnapshot(ctx context.Context, req *control.NetmapSnapshotRequest) (*control.NetmapSnapshotResponse, error) {
+	panic("implement me")
+}

pkg/services/control/service.go

@@ -58,3 +58,38 @@ func (m *HealthCheckResponse) ReadSignedData(buf []byte) ([]byte, error) {
 func (m *HealthCheckResponse) SignedDataSize() int {
 	return m.GetBody().Size()
 }
+
+// SetBody sets get netmap snapshot request body.
+func (m *NetmapSnapshotRequest) SetBody(v *NetmapSnapshotRequest_Body) {
+	if m != nil {
+		m.Body = v
+	}
+}
+
+// SetSignature sets signature of the netmap snapshot request body.
+func (m *NetmapSnapshotRequest) SetSignature(body *Signature) {
+	if m != nil {
+		m.Signature = body
+	}
+}
+
+// SetNetmap sets structure of the current network map.
+func (m *NetmapSnapshotResponse_Body) SetNetmap(v *Netmap) {
+	if m != nil {
+		m.Netmap = v
+	}
+}
+
+// SetBody sets get netmap snapshot response body.
+func (m *NetmapSnapshotResponse) SetBody(v *NetmapSnapshotResponse_Body) {
+	if m != nil {
+		m.Body = v
+	}
+}
+
+// SetSignature sets signature of the get netmap snapshot response body.
+func (m *NetmapSnapshotResponse) SetSignature(v *Signature) {
+	if m != nil {
+		m.Signature = v
+	}
+}

pkg/services/control/service.proto

@@ -10,6 +10,9 @@ option go_package = "github.com/nspcc-dev/neofs-node/pkg/services/control";
 service ControlService {
     // Performs health check of the storage node.
     rpc HealthCheck (HealthCheckRequest) returns (HealthCheckResponse);
+
+    // Returns network map snapshot of the current NeoFS epoch.
+    rpc NetmapSnapshot (NetmapSnapshotRequest) returns (NetmapSnapshotResponse);
 }
 
 // Health check request.
@@ -39,3 +42,31 @@ message HealthCheckResponse {
     // Body signature.
     Signature signature = 2;
 }
+
+// Get netmap snapshot request.
+message NetmapSnapshotRequest {
+    // Get netmap snapshot request body.
+    message Body {
+    }
+
+    // Body of get netmap snapshot request message.
+    Body body = 1;
+
+    // Body signature.
+    Signature signature = 2;
+}
+
+// Get netmap snapshot request.
+message NetmapSnapshotResponse {
+    // Get netmap snapshot response body
+    message Body {
+        // Structure of the requested network map.
+        Netmap netmap = 1 [json_name = "netmap"];
+    }
+
+    // Body of get netmap snapshot response message.
+    Body body = 1;
+
+    // Body signature.
+    Signature signature = 2;
+}