[#1184] node: Add audit middleware for grpc services

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/services/netmap/audit.go

@@ -0,0 +1,60 @@
+package netmap
+
+import (
+	"context"
+	"sync/atomic"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/netmap"
+	netmapGRPC "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/netmap/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/audit"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
+)
+
+var _ Server = (*auditService)(nil)
+
+type auditService struct {
+	next    Server
+	log     *logger.Logger
+	enabled *atomic.Bool
+}
+
+func NewAuditService(next Server, log *logger.Logger, enabled *atomic.Bool) Server {
+	return &auditService{
+		next:    next,
+		log:     log,
+		enabled: enabled,
+	}
+}
+
+// LocalNodeInfo implements Server.
+func (a *auditService) LocalNodeInfo(ctx context.Context, req *netmap.LocalNodeInfoRequest) (*netmap.LocalNodeInfoResponse, error) {
+	res, err := a.next.LocalNodeInfo(ctx, req)
+	if !a.enabled.Load() {
+		return res, err
+	}
+	audit.LogRequest(a.log, netmapGRPC.NetmapService_LocalNodeInfo_FullMethodName, req,
+		nil, err == nil)
+	return res, err
+}
+
+// NetworkInfo implements Server.
+func (a *auditService) NetworkInfo(ctx context.Context, req *netmap.NetworkInfoRequest) (*netmap.NetworkInfoResponse, error) {
+	res, err := a.next.NetworkInfo(ctx, req)
+	if !a.enabled.Load() {
+		return res, err
+	}
+	audit.LogRequest(a.log, netmapGRPC.NetmapService_NetworkInfo_FullMethodName, req,
+		nil, err == nil)
+	return res, err
+}
+
+// Snapshot implements Server.
+func (a *auditService) Snapshot(ctx context.Context, req *netmap.SnapshotRequest) (*netmap.SnapshotResponse, error) {
+	res, err := a.next.Snapshot(ctx, req)
+	if !a.enabled.Load() {
+		return res, err
+	}
+	audit.LogRequest(a.log, netmapGRPC.NetmapService_NetmapSnapshot_FullMethodName, req,
+		nil, err == nil)
+	return res, err
+}