/
nse_server.go
119 lines (102 loc) · 3.95 KB
/
nse_server.go
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// Copyright (c) 2022-2024 Cisco and/or its affiliates.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package updatepath
import (
"context"
"github.com/golang/protobuf/ptypes/empty"
"github.com/pkg/errors"
"github.com/networkservicemesh/api/pkg/api/registry"
"github.com/networkservicemesh/sdk/pkg/registry/common/grpcmetadata"
"github.com/networkservicemesh/sdk/pkg/registry/core/next"
"github.com/networkservicemesh/sdk/pkg/tools/log"
"github.com/networkservicemesh/sdk/pkg/tools/token"
)
type updatePathNSEServer struct {
tokenGenerator token.GeneratorFunc
}
// NewNetworkServiceEndpointRegistryServer - creates a new updatePath server to update NetworkServiceEndpoint path.
func NewNetworkServiceEndpointRegistryServer(tokenGenerator token.GeneratorFunc) registry.NetworkServiceEndpointRegistryServer {
return &updatePathNSEServer{
tokenGenerator: tokenGenerator,
}
}
func (s *updatePathNSEServer) Register(ctx context.Context, nse *registry.NetworkServiceEndpoint) (*registry.NetworkServiceEndpoint, error) {
path := grpcmetadata.PathFromContext(ctx)
// Update path
peerTok, _, peerTokenErr := token.FromContext(ctx)
if peerTokenErr != nil {
log.FromContext(ctx).Warnf("an error during getting peer token from the context: %+v", peerTokenErr)
}
tok, expirationTime, tokenErr := generateToken(ctx, s.tokenGenerator)
if tokenErr != nil {
return nil, errors.Wrap(tokenErr, "an error during generating token")
}
path, index, err := updatePath(path, peerTok, tok)
if err != nil {
return nil, err
}
// Update path ids
peerID, idErr := getIDFromToken(peerTok)
if idErr != nil {
log.FromContext(ctx).Warnf("an error during parsing peer token: %+v", tokenErr)
}
id, idErr := getIDFromToken(tok)
if idErr != nil {
return nil, idErr
}
nse.PathIds = updatePathIds(nse.PathIds, int(path.Index-1), peerID.String())
nse.PathIds = updatePathIds(nse.PathIds, int(path.Index), id.String())
ctx = withExpirationTime(ctx, &expirationTime)
nse, err = next.NetworkServiceEndpointRegistryServer(ctx).Register(ctx, nse)
if err != nil {
return nil, err
}
path.Index = index
return nse, nil
}
func (s *updatePathNSEServer) Find(query *registry.NetworkServiceEndpointQuery, server registry.NetworkServiceEndpointRegistry_FindServer) error {
return next.NetworkServiceEndpointRegistryServer(server.Context()).Find(query, server)
}
func (s *updatePathNSEServer) Unregister(ctx context.Context, nse *registry.NetworkServiceEndpoint) (*empty.Empty, error) {
path := grpcmetadata.PathFromContext(ctx)
// Update path
peerTok, _, tokenErr := token.FromContext(ctx)
if tokenErr != nil {
log.FromContext(ctx).Warnf("an error during getting peer token from the context: %+v", tokenErr)
}
tok, _, tokenErr := generateToken(ctx, s.tokenGenerator)
if tokenErr != nil {
return nil, errors.Wrap(tokenErr, "an error during generating token")
}
path, index, err := updatePath(path, peerTok, tok)
if err != nil {
return nil, err
}
// Update path ids
peerID, idErr := getIDFromToken(peerTok)
if idErr != nil {
log.FromContext(ctx).Warnf("an error during parsing peer token: %+v", tokenErr)
}
id, idErr := getIDFromToken(tok)
if idErr != nil {
return nil, idErr
}
nse.PathIds = updatePathIds(nse.PathIds, int(path.Index-1), peerID.String())
nse.PathIds = updatePathIds(nse.PathIds, int(path.Index), id.String())
resp, err := next.NetworkServiceEndpointRegistryServer(ctx).Unregister(ctx, nse)
path.Index = index
return resp, err
}