frostfs-node/pkg/services/control/server/netmap_snapshot.go

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package control
import (
"context"
"github.com/nspcc-dev/neofs-node/pkg/services/control"
netmapAPI "github.com/nspcc-dev/neofs-sdk-go/netmap"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// NetmapSnapshot reads network map snapshot from Netmap storage.
func (s *Server) NetmapSnapshot(ctx context.Context, req *control.NetmapSnapshotRequest) (*control.NetmapSnapshotResponse, error) {
// verify request
if err := s.isValidRequest(req); err != nil {
return nil, status.Error(codes.PermissionDenied, err.Error())
}
// get current epoch
epoch, err := s.netMapSrc.Epoch()
if err != nil {
return nil, status.Error(codes.NotFound, err.Error())
}
apiNetMap, err := s.netMapSrc.GetNetMapByEpoch(epoch)
if err != nil {
return nil, status.Error(codes.NotFound, err.Error())
}
nm := new(control.Netmap)
nm.SetEpoch(epoch)
nm.SetNodes(nodesFromAPI(apiNetMap.Nodes()))
// create and fill response
resp := new(control.NetmapSnapshotResponse)
body := new(control.NetmapSnapshotResponse_Body)
resp.SetBody(body)
body.SetNetmap(nm)
// sign the response
if err := SignMessage(s.key, resp); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return resp, nil
}
func nodesFromAPI(apiNodes []netmapAPI.NodeInfo) []*control.NodeInfo {
nodes := make([]*control.NodeInfo, 0, len(apiNodes))
for i := range apiNodes {
node := new(control.NodeInfo)
node.SetPublicKey(apiNodes[i].PublicKey())
addrs := make([]string, 0, apiNodes[i].NumberOfNetworkEndpoints())
netmapAPI.IterateNetworkEndpoints(apiNodes[i], func(s string) {
addrs = append(addrs, s)
})
node.SetAddresses(addrs)
node.SetAttributes(attributesFromAPI(apiNodes[i]))
switch {
default:
node.SetState(control.NetmapStatus_STATUS_UNDEFINED)
case apiNodes[i].IsOnline():
node.SetState(control.NetmapStatus_ONLINE)
case apiNodes[i].IsOffline():
node.SetState(control.NetmapStatus_OFFLINE)
}
nodes = append(nodes, node)
}
return nodes
}
func attributesFromAPI(apiNode netmapAPI.NodeInfo) []*control.NodeInfo_Attribute {
attrs := make([]*control.NodeInfo_Attribute, 0, apiNode.NumberOfAttributes())
apiNode.IterateAttributes(func(key, value string) {
a := new(control.NodeInfo_Attribute)
a.SetKey(key)
a.SetValue(value)
attrs = append(attrs, a)
})
return attrs
}