diff --git a/management/internals/shared/grpc/components_encoder.go b/management/internals/shared/grpc/components_encoder.go index 7e43cf478..e1a5cae48 100644 --- a/management/internals/shared/grpc/components_encoder.go +++ b/management/internals/shared/grpc/components_encoder.go @@ -61,6 +61,8 @@ func EncodeNetworkMapEnvelope(in ComponentsEnvelopeInput) *proto.NetworkMapEnvel return &proto.NetworkMapEnvelope{ Payload: &proto.NetworkMapEnvelope_Full{ Full: &proto.NetworkMapComponentsFull{ + Serial: networkSerial(c.Network), + Network: toAccountNetwork(c.Network), PeerConfig: in.PeerConfig, // components.Peers always contains the target peer Peers: []*proto.PeerCompact{toPeerCompact(c.Peers[c.PeerID])}, diff --git a/management/internals/shared/grpc/components_encoder_test.go b/management/internals/shared/grpc/components_encoder_test.go index 100ab0948..f7df82f2f 100644 --- a/management/internals/shared/grpc/components_encoder_test.go +++ b/management/internals/shared/grpc/components_encoder_test.go @@ -758,6 +758,9 @@ func TestEncodeNetworkMapEnvelope_NilComponentsGracefulDegrade(t *testing.T) { assert.Equal(t, "netbird.cloud", full.DnsDomain) assert.Len(t, full.Peers, 1) assert.Empty(t, full.Policies) + require.NotNil(t, full.Network, "client runs Calculate() over the envelope and dereferences Network unconditionally; a nil here would crash the receiver") + assert.Equal(t, "net-empty", full.Network.Identifier) + assert.Equal(t, uint64(9), full.Serial) } func TestEncodeNetworkMapEnvelope_AccountSettingsAlwaysEmitted(t *testing.T) { @@ -776,6 +779,12 @@ func TestEncodeNetworkMapEnvelope_AccountSettingsAlwaysEmitted(t *testing.T) { func emptyNetworkMapComponents() *types.NetworkMapComponents { return types.EmptyNetworkMapComponents( &types.NetworkMapComponents{ - PeerID: "peer-id", Peers: map[string]*types.ComponentPeer{"peer-id": {}}}, + PeerID: "peer-id", Peers: map[string]*types.ComponentPeer{"peer-id": {}}, + Network: &types.Network{ + Identifier: "net-empty", + Net: net.IPNet{IP: net.IP{100, 64, 0, 0}, Mask: net.CIDRMask(10, 32)}, + Serial: 9, + }, + }, ) } diff --git a/shared/management/networkmap/decode.go b/shared/management/networkmap/decode.go index d15117b6e..4864a9dff 100644 --- a/shared/management/networkmap/decode.go +++ b/shared/management/networkmap/decode.go @@ -228,15 +228,17 @@ func DecodeEnvelope(env *proto.NetworkMapEnvelope) (*types.NetworkMapComponents, return c, nil } +// decodeAccountNetwork never returns nil — Calculate() dereferences +// c.Network unconditionally, and servers that predate the fix omit the field +// entirely from the empty-components envelope. func decodeAccountNetwork(an *proto.AccountNetwork) *types.Network { + n := &types.Network{} if an == nil { - return nil - } - n := &types.Network{ - Identifier: an.Identifier, - Dns: an.Dns, - Serial: an.Serial, + return n } + n.Identifier = an.Identifier + n.Dns = an.Dns + n.Serial = an.Serial if an.NetCidr != "" { if _, ipnet, err := net.ParseCIDR(an.NetCidr); err == nil && ipnet != nil { n.Net = *ipnet diff --git a/shared/management/networkmap/envelope_test.go b/shared/management/networkmap/envelope_test.go index a81478aff..92e1916da 100644 --- a/shared/management/networkmap/envelope_test.go +++ b/shared/management/networkmap/envelope_test.go @@ -221,6 +221,66 @@ func TestEnvelopeRoundTrip_AllGroupShortCircuitParity(t *testing.T) { "client-side Calculate must connect the same remote peers as the server") } +// TestEnvelopeToNetworkMap_EmptyComponents covers the graceful-degrade path +// the server takes for a peer that is missing from the account or absent from +// the validated-peers map. The legacy server short-circuited before +// Calculate() and shipped a NetworkMap carrying only the account Network; the +// components path runs Calculate() on the client instead, so the envelope must +// carry Network or the client panics dereferencing a nil *types.Network. +func TestEnvelopeToNetworkMap_EmptyComponents(t *testing.T) { + localPeerKey := randomWgKey(t) + c := types.EmptyNetworkMapComponents(&types.NetworkMapComponents{ + PeerID: "peer-A", + Network: &types.Network{ + Identifier: "net-empty", + Net: net.IPNet{IP: net.IP{100, 64, 0, 0}, Mask: net.CIDRMask(10, 32)}, + Serial: 7, + }, + Peers: map[string]*types.ComponentPeer{ + "peer-A": {ID: "peer-A", Key: localPeerKey, IP: netip.AddrFrom4([4]byte{100, 64, 0, 1})}, + }, + }) + + envelope := mgmtgrpc.EncodeNetworkMapEnvelope(mgmtgrpc.ComponentsEnvelopeInput{ + Components: c, + DNSDomain: "netbird.cloud", + }) + require.NotNil(t, envelope.GetFull().Network, "empty envelope must carry the account Network") + + wire, err := goproto.Marshal(envelope) + require.NoError(t, err, "marshal envelope") + var decoded proto.NetworkMapEnvelope + require.NoError(t, goproto.Unmarshal(wire, &decoded), "unmarshal envelope") + + result, err := nbnetworkmap.EnvelopeToNetworkMap(context.Background(), &decoded, localPeerKey, "netbird.cloud") + require.NoError(t, err, "EnvelopeToNetworkMap must degrade gracefully on empty components") + require.Equal(t, uint64(7), result.NetworkMap.Serial) + require.Empty(t, result.NetworkMap.RemotePeers, "unvalidated peer connects to nobody") +} + +// TestEnvelopeToNetworkMap_MissingNetwork simulates a server that omits +// AccountNetwork from the envelope. Clients must degrade rather than panic, so +// they survive talking to a management server that predates the encoder fix. +func TestEnvelopeToNetworkMap_MissingNetwork(t *testing.T) { + c, localPeerKey := buildSmokeComponents(t) + + envelope := mgmtgrpc.EncodeNetworkMapEnvelope(mgmtgrpc.ComponentsEnvelopeInput{ + Components: c, + DNSDomain: "netbird.cloud", + }) + envelope.GetFull().Network = nil + + wire, err := goproto.Marshal(envelope) + require.NoError(t, err, "marshal envelope") + var decoded proto.NetworkMapEnvelope + require.NoError(t, goproto.Unmarshal(wire, &decoded), "unmarshal envelope") + + result, err := nbnetworkmap.EnvelopeToNetworkMap(context.Background(), &decoded, localPeerKey, "netbird.cloud") + require.NoError(t, err, "a missing AccountNetwork must not panic the client") + require.NotNil(t, result.Components.Network) + require.NotEmpty(t, result.NetworkMap.RemotePeers, "the rest of the snapshot stays usable") +} + // buildSmokeComponents returns a minimal NetworkMapComponents (2 peers, 1 // group, 1 allow policy) plus the receiving peer's WG public key. Sufficient // to validate the encode → marshal → decode → Calculate pipeline produces