forked from projectcalico/felix
/
creds.go
109 lines (91 loc) · 2.63 KB
/
creds.go
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// Copyright (c) 2018 Tigera, Inc. All rights reserved.
//
// 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 binder
import (
"errors"
"net"
"sync"
"golang.org/x/net/context"
"google.golang.org/grpc/credentials"
)
type workloadStore struct {
mu sync.RWMutex
creds map[string]workload
}
func newWorkloadStore() *workloadStore {
return &workloadStore{creds: make(map[string]workload)}
}
func (s *workloadStore) ClientHandshake(_ context.Context, _ string, conn net.Conn) (net.Conn, credentials.AuthInfo, error) {
return conn, Credentials{}, errors.New("client handshake unsupported")
}
func (s *workloadStore) ServerHandshake(conn net.Conn) (net.Conn, credentials.AuthInfo, error) {
s.mu.RLock()
defer s.mu.RUnlock()
// TODO: maybe index this for faster lookup?
addr := conn.LocalAddr()
for _, w := range s.creds {
if addrEqual(addr, w.listener.Addr()) {
return conn, w.creds, nil
}
}
return conn, Credentials{}, errors.New("unknown listener")
}
func (s *workloadStore) Info() credentials.ProtocolInfo {
return credentials.ProtocolInfo{
SecurityProtocol: authType,
SecurityVersion: "0.1",
ServerName: "workloadhandler",
}
}
func (s *workloadStore) Clone() credentials.TransportCredentials {
other := make(map[string]workload)
s.mu.RLock()
defer s.mu.RUnlock()
for k, v := range s.creds {
other[k] = v
}
return &workloadStore{creds: other}
}
func (s *workloadStore) OverrideServerName(_ string) error {
return nil
}
// Internal methods for concurrent access to store data.
func (s *workloadStore) getAll() []workload {
s.mu.RLock()
defer s.mu.RUnlock()
ws := make([]workload, 0, len(s.creds))
for _, w := range s.creds {
ws = append(ws, w)
}
return ws
}
func (s *workloadStore) get(uid string) workload {
s.mu.RLock()
defer s.mu.RUnlock()
return s.creds[uid]
}
func (s *workloadStore) delete(uid string) {
s.mu.Lock()
defer s.mu.Unlock()
delete(s.creds, uid)
return
}
func (s *workloadStore) store(uid string, w workload) {
s.mu.Lock()
defer s.mu.Unlock()
s.creds[uid] = w
}
func addrEqual(this, that net.Addr) bool {
return this.Network() == that.Network() && this.String() == that.String()
}