[#312] netmap: Support multiple addresses in NodeInfo

In latest NeoFS API changes `NodeInfo` message carries list of network
addresses. There is a need

Add `SetAddresses` / `IterateAddresses` / `NumberOfAddresses` methods to
provide the access to node's address group. Mark `Address` / `SetAddress`
methods as deprecated.

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

pkg/netmap/node_info.go

@@ -332,15 +332,52 @@ func (i *NodeInfo) SetPublicKey(key []byte) {
 }
 
 // Address returns network endpoint address of the node.
-func (i *NodeInfo) Address() string {
-	return (*netmap.NodeInfo)(i).
-		GetAddress()
+//
+// Deprecated: use IterateAddresses method.
+func (i *NodeInfo) Address() (addr string) {
+	i.IterateAddresses(func(s string) bool {
+		addr = s
+		return true
+	})
+
+	return
 }
 
 // SetAddress sets network endpoint address of the node.
+//
+// Deprecated: use SetAddresses method.
 func (i *NodeInfo) SetAddress(addr string) {
+	i.SetAddresses(addr)
+}
+
+// NumberOfAddresses returns number of network addresses of the node.
+func (i *NodeInfo) NumberOfAddresses() int {
+	return (*netmap.NodeInfo)(i).
+		NumberOfAddresses()
+}
+
+// IterateAddresses iterates over network addresses of the node.
+// Breaks iteration on f's true return.
+//
+// Handler should not be nil.
+func (i *NodeInfo) IterateAddresses(f func(string) bool) {
 	(*netmap.NodeInfo)(i).
-		SetAddress(addr)
+		IterateAddresses(f)
+}
+
+// IterateAllAddresses is a helper function to unconditionally
+// iterate over all node addresses.
+func IterateAllAddresses(i *NodeInfo, f func(string)) {
+	i.IterateAddresses(func(addr string) bool {
+		f(addr)
+		return false
+	})
+}
+
+// SetAddresses sets list of network addresses of the node.
+func (i *NodeInfo) SetAddresses(v ...string) {
+	(*netmap.NodeInfo)(i).
+		SetAddresses(v...)
 }
 
 // Attributes returns list of the node attributes.

pkg/netmap/node_info_test.go

@@ -124,13 +124,21 @@ func TestNodeInfo_PublicKey(t *testing.T) {
 	require.Equal(t, key, i.PublicKey())
 }
 
-func TestNodeInfo_Address(t *testing.T) {
+func TestNodeInfo_IterateAddresses(t *testing.T) {
 	i := new(NodeInfo)
-	a := "127.0.0.1:8080"
 
-	i.SetAddress(a)
+	as := []string{"127.0.0.1:8080", "127.0.0.1:8081"}
 
-	require.Equal(t, a, i.Address())
+	i.SetAddresses(as...)
+
+	as2 := make([]string, 0, i.NumberOfAddresses())
+
+	IterateAllAddresses(i, func(addr string) {
+		as2 = append(as2, addr)
+	})
+
+	require.Equal(t, as, as2)
+	require.EqualValues(t, len(as), i.NumberOfAddresses())
 }
 
 func TestNodeInfo_State(t *testing.T) {
@@ -178,7 +186,7 @@ func TestNodeAttributeEncoding(t *testing.T) {
 func TestNodeInfoEncoding(t *testing.T) {
 	i := NewNodeInfo()
 	i.SetPublicKey([]byte{1, 2, 3})
-	i.SetAddress("192.168.0.1")
+	i.SetAddresses("192.168.0.1", "192.168.0.2")
 	i.SetState(NodeStateOnline)
 	i.SetAttributes(testNodeAttribute())
 
@@ -227,7 +235,8 @@ func TestNewNodeInfo(t *testing.T) {
 
 		// check initial values
 		require.Nil(t, ni.PublicKey())
-		require.Empty(t, ni.Address())
+
+		require.Zero(t, ni.NumberOfAddresses())
 		require.Nil(t, ni.Attributes())
 		require.Zero(t, ni.State())
 
@@ -235,7 +244,7 @@ func TestNewNodeInfo(t *testing.T) {
 		niV2 := ni.ToV2()
 
 		require.Nil(t, niV2.GetPublicKey())
-		require.Empty(t, niV2.GetAddress())
+		require.Zero(t, niV2.NumberOfAddresses())
 		require.Nil(t, niV2.GetAttributes())
 		require.EqualValues(t, netmap.UnspecifiedState, niV2.GetState())
 	})

pkg/netmap/test/generate.go

@@ -84,7 +84,7 @@ func NodeAttribute() *netmap.NodeAttribute {
 func NodeInfo() *netmap.NodeInfo {
 	x := netmap.NewNodeInfo()
 
-	x.SetAddress("address")
+	x.SetAddresses("address 1", "address 2")
 	x.SetPublicKey([]byte("public key"))
 	x.SetState(netmap.NodeStateOnline)
 	x.SetAttributes(NodeAttribute(), NodeAttribute())

v2/netmap/convert.go

@@ -342,7 +342,7 @@ func (ni *NodeInfo) ToGRPCMessage() grpc.Message {
 		m = new(netmap.NodeInfo)
 
 		m.SetPublicKey(ni.publicKey)
-		m.SetAddress(ni.address)
+		m.SetAddresses(ni.addresses)
 		m.SetState(NodeStateToGRPCMessage(ni.state))
 		m.SetAttributes(AttributesToGRPC(ni.attributes))
 	}
@@ -364,7 +364,7 @@ func (ni *NodeInfo) FromGRPCMessage(m grpc.Message) error {
 	}
 
 	ni.publicKey = v.GetPublicKey()
-	ni.address = v.GetAddress()
+	ni.addresses = v.GetAddresses()
 	ni.state = NodeStateFromRPCMessage(v.GetState())
 
 	return nil

v2/netmap/grpc/types.go

@@ -134,9 +134,16 @@ func (m *NodeInfo_Attribute) SetParents(v []string) {
 }
 
 // SetAddress sets node network address.
+//
+// Deprecated: use SetAddresses.
 func (m *NodeInfo) SetAddress(v string) {
+	m.SetAddresses([]string{v})
+}
+
+// SetAddresses sets list of network addresses of the node.
+func (m *NodeInfo) SetAddresses(v []string) {
 	if m != nil {
-		m.Address = v
+		m.Addresses = v
 	}
 }
 

v2/netmap/marshal.go

@@ -367,7 +367,7 @@ func (ni *NodeInfo) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = protoutil.StringMarshal(addressNodeInfoField, buf[offset:], ni.address)
+	n, err = protoutil.RepeatedStringMarshal(addressNodeInfoField, buf[offset:], ni.addresses)
 	if err != nil {
 		return nil, err
 	}
@@ -397,7 +397,8 @@ func (ni *NodeInfo) StableSize() (size int) {
 	}
 
 	size += protoutil.BytesSize(keyNodeInfoField, ni.publicKey)
-	size += protoutil.StringSize(addressNodeInfoField, ni.address)
+	size += protoutil.RepeatedStringSize(addressNodeInfoField, ni.addresses)
+
 	for i := range ni.attributes {
 		size += protoutil.NestedStructureSize(attributesNodeInfoField, ni.attributes[i])
 	}

v2/netmap/test/generate.go

@@ -135,7 +135,7 @@ func GenerateNodeInfo(empty bool) *netmap.NodeInfo {
 	m := new(netmap.NodeInfo)
 
 	if !empty {
-		m.SetAddress("node address")
+		m.SetAddresses("node address", "node address 2")
 		m.SetPublicKey([]byte{1, 2, 3})
 		m.SetState(33)
 		m.SetAttributes(GenerateAttributes(empty))

v2/netmap/types.go

@@ -71,7 +71,7 @@ type Attribute struct {
 // NodeInfo of storage node.
 type NodeInfo struct {
 	publicKey  []byte
-	address    string
+	addresses  []string
 	attributes []*Attribute
 	state      NodeState
 }
@@ -386,17 +386,52 @@ func (ni *NodeInfo) SetPublicKey(v []byte) {
 	}
 }
 
-func (ni *NodeInfo) GetAddress() string {
-	if ni != nil {
-		return ni.address
-	}
-
-	return ""
+// GetAddress returns node's network address.
+//
+// Deprecated: use IterateAddresses.
+func (ni *NodeInfo) GetAddress() (addr string) {
+	ni.IterateAddresses(func(s string) bool {
+		addr = s
+		return true
+	})
+
+	return
 }
 
+// SetAddress sets node's network address.
+//
+// Deprecated: use SetAddresses.
 func (ni *NodeInfo) SetAddress(v string) {
+	ni.SetAddresses(v)
+}
+
+// SetAddresses sets list of network addresses of the node.
+func (ni *NodeInfo) SetAddresses(v ...string) {
 	if ni != nil {
-		ni.address = v
+		ni.addresses = v
+	}
+}
+
+// NumberOfAddresses returns number of network addresses of the node.
+func (ni *NodeInfo) NumberOfAddresses() int {
+	if ni != nil {
+		return len(ni.addresses)
+	}
+
+	return 0
+}
+
+// IterateAddresses iterates over network addresses of the node.
+// Breaks iteration on f's true return.
+//
+// Handler should not be nil.
+func (ni *NodeInfo) IterateAddresses(f func(string) bool) {
+	if ni != nil {
+		for i := range ni.addresses {
+			if f(ni.addresses[i]) {
+				break
+			}
+		}
 	}
 }