[#416] session: Support new format of object session context

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

session/convert.go

@@ -674,7 +674,7 @@ func (c *ObjectSessionContext) ToGRPCMessage() grpc.Message {
 		m = new(session.ObjectSessionContext)
 
 		m.SetVerb(ObjectSessionVerbToGRPCField(c.verb))
-		m.SetAddress(c.addr.ToGRPCMessage().(*refsGRPC.Address))
+		m.SetTarget(c.cnr.ToGRPCMessage().(*refsGRPC.ContainerID), refs.ObjectIDListToGRPCMessage(c.objs))
 	}
 
 	return m
@@ -688,20 +688,25 @@ func (c *ObjectSessionContext) FromGRPCMessage(m grpc.Message) error {
 
 	var err error
 
-	addr := v.GetAddress()
+	cnr := v.GetTarget().GetContainer()
-	if addr == nil {
+	if cnr == nil {
-		c.addr = nil
+		c.cnr = nil
 	} else {
-		if c.addr == nil {
+		if c.cnr == nil {
-			c.addr = new(refs.Address)
+			c.cnr = new(refs.ContainerID)
 		}
 
-		err = c.addr.FromGRPCMessage(addr)
+		err = c.cnr.FromGRPCMessage(cnr)
 		if err != nil {
 			return err
 		}
 	}
 
+	c.objs, err = refs.ObjectIDListFromGRPCMessage(v.GetTarget().GetObjects())
+	if err != nil {
+		return err
+	}
+
 	c.verb = ObjectSessionVerbFromGRPCField(v.GetVerb())
 
 	return nil

session/grpc/types.go

@@ -65,9 +65,12 @@ func (m *SessionToken_Body) SetContainerSessionContext(v *ContainerSessionContex
 	}
 }
 
-// SetAddress sets address of the object related to the session.
+// SetTarget specifies objects involved in the object session.
-func (m *ObjectSessionContext) SetAddress(v *refs.Address) {
+func (m *ObjectSessionContext) SetTarget(cnr *refs.ContainerID, objs []*refs.ObjectID) {
-	m.Address = v
+	m.Target = &ObjectSessionContext_Target{
+		Container: cnr,
+		Objects:   objs,
+	}
 }
 
 // SetVerb sets type of request for which the token is issued.

session/marshal.go

@@ -21,8 +21,8 @@ const (
 	lifetimeNotValidBeforeField = 2
 	lifetimeIssuedAtField       = 3
 
-	objectCtxVerbField    = 1
+	objectCtxVerbField   = 1
-	objectCtxAddressField = 2
+	objectCtxTargetField = 2
 
 	sessionTokenBodyIDField        = 1
 	sessionTokenBodyOwnerField     = 2
@@ -210,10 +210,11 @@ func (c *ObjectSessionContext) StableMarshal(buf []byte) []byte {
 		buf = make([]byte, c.StableSize())
 	}
 
-	var offset int
+	offset := proto.EnumMarshal(objectCtxVerbField, buf, int32(c.verb))
-
+	proto.NestedStructureMarshal(objectCtxTargetField, buf[offset:], &objectSessionContextTarget{
-	offset += proto.EnumMarshal(objectCtxVerbField, buf[offset:], int32(c.verb))
+		cnr:  c.cnr,
-	proto.NestedStructureMarshal(objectCtxAddressField, buf[offset:], c.addr)
+		objs: c.objs,
+	})
 
 	return buf
 }
@@ -224,7 +225,10 @@ func (c *ObjectSessionContext) StableSize() (size int) {
 	}
 
 	size += proto.EnumSize(objectCtxVerbField, int32(c.verb))
-	size += proto.NestedStructureSize(objectCtxAddressField, c.addr)
+	size += proto.NestedStructureSize(objectCtxTargetField, &objectSessionContextTarget{
+		cnr:  c.cnr,
+		objs: c.objs,
+	})
 
 	return size
 }

session/test/generate.go

@@ -195,7 +195,7 @@ func GenerateObjectSessionContext(empty bool) *session.ObjectSessionContext {
 
 	if !empty {
 		m.SetVerb(session.ObjectVerbHead)
-		m.SetAddress(refstest.GenerateAddress(false))
+		m.SetTarget(refstest.GenerateContainerID(false), refstest.GenerateObjectIDs(false)...)
 	}
 
 	return m

session/types.go

@@ -4,6 +4,7 @@ import (
 	"github.com/nspcc-dev/neofs-api-go/v2/acl"
 	"github.com/nspcc-dev/neofs-api-go/v2/refs"
 	"github.com/nspcc-dev/neofs-api-go/v2/status"
+	"github.com/nspcc-dev/neofs-api-go/v2/util/proto"
 )
 
 type CreateRequestBody struct {
@@ -40,10 +41,48 @@ type TokenLifetime struct {
 
 type ObjectSessionVerb uint32
 
+type objectSessionContextTarget struct {
+	cnr *refs.ContainerID
+
+	objs []refs.ObjectID
+}
+
+const (
+	_ = iota
+	fNumObjectTargetContainer
+	fNumObjectTargetObjects
+)
+
+func (x objectSessionContextTarget) StableMarshal(buf []byte) []byte {
+	if buf == nil {
+		buf = make([]byte, x.StableSize())
+	}
+
+	offset := proto.NestedStructureMarshal(fNumObjectTargetContainer, buf, x.cnr)
+
+	for i := range x.objs {
+		offset += proto.NestedStructureMarshal(fNumObjectTargetObjects, buf[offset:], &x.objs[i])
+	}
+
+	return buf
+}
+
+func (x objectSessionContextTarget) StableSize() (size int) {
+	size += proto.NestedStructureSize(fNumObjectTargetContainer, x.cnr)
+
+	for i := range x.objs {
+		size += proto.NestedStructureSize(fNumObjectTargetObjects, &x.objs[i])
+	}
+
+	return size
+}
+
 type ObjectSessionContext struct {
 	verb ObjectSessionVerb
 
-	addr *refs.Address
+	cnr *refs.ContainerID
+
+	objs []refs.ObjectID
 }
 
 type TokenContext interface {
@@ -617,16 +656,25 @@ func (c *ObjectSessionContext) SetVerb(v ObjectSessionVerb) {
 	c.verb = v
 }
 
-func (c *ObjectSessionContext) GetAddress() *refs.Address {
+func (c *ObjectSessionContext) GetContainer() *refs.ContainerID {
 	if c != nil {
-		return c.addr
+		return c.cnr
 	}
 
 	return nil
 }
 
-func (c *ObjectSessionContext) SetAddress(v *refs.Address) {
+func (c *ObjectSessionContext) GetObjects() []refs.ObjectID {
-	c.addr = v
+	if c != nil {
+		return c.objs
+	}
+
+	return nil
+}
+
+func (c *ObjectSessionContext) SetTarget(cnr *refs.ContainerID, objs ...refs.ObjectID) {
+	c.cnr = cnr
+	c.objs = objs
 }
 
 func (t *TokenBody) GetID() []byte {