frp/server/manager.go

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// Copyright 2017 fatedier, fatedier@gmail.com
//
// 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.
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package server
import (
"fmt"
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"io"
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"sync"
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frpIo "github.com/fatedier/frp/utils/io"
frpNet "github.com/fatedier/frp/utils/net"
"github.com/fatedier/frp/utils/util"
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)
type ControlManager struct {
// controls indexed by run id
ctlsByRunId map[string]*Control
mu sync.RWMutex
}
func NewControlManager() *ControlManager {
return &ControlManager{
ctlsByRunId: make(map[string]*Control),
}
}
func (cm *ControlManager) Add(runId string, ctl *Control) (oldCtl *Control) {
cm.mu.Lock()
defer cm.mu.Unlock()
oldCtl, ok := cm.ctlsByRunId[runId]
if ok {
oldCtl.Replaced(ctl)
}
cm.ctlsByRunId[runId] = ctl
return
}
func (cm *ControlManager) GetById(runId string) (ctl *Control, ok bool) {
cm.mu.RLock()
defer cm.mu.RUnlock()
ctl, ok = cm.ctlsByRunId[runId]
return
}
type ProxyManager struct {
// proxies indexed by proxy name
pxys map[string]Proxy
mu sync.RWMutex
}
func NewProxyManager() *ProxyManager {
return &ProxyManager{
pxys: make(map[string]Proxy),
}
}
func (pm *ProxyManager) Add(name string, pxy Proxy) error {
pm.mu.Lock()
defer pm.mu.Unlock()
if _, ok := pm.pxys[name]; ok {
return fmt.Errorf("proxy name [%s] is already in use", name)
}
pm.pxys[name] = pxy
return nil
}
func (pm *ProxyManager) Del(name string) {
pm.mu.Lock()
defer pm.mu.Unlock()
delete(pm.pxys, name)
}
func (pm *ProxyManager) GetByName(name string) (pxy Proxy, ok bool) {
pm.mu.RLock()
defer pm.mu.RUnlock()
pxy, ok = pm.pxys[name]
return
}
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// Manager for visitor listeners.
type VisitorManager struct {
visitorListeners map[string]*frpNet.CustomListener
skMap map[string]string
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mu sync.RWMutex
}
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func NewVisitorManager() *VisitorManager {
return &VisitorManager{
visitorListeners: make(map[string]*frpNet.CustomListener),
skMap: make(map[string]string),
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}
}
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func (vm *VisitorManager) Listen(name string, sk string) (l *frpNet.CustomListener, err error) {
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vm.mu.Lock()
defer vm.mu.Unlock()
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if _, ok := vm.visitorListeners[name]; ok {
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err = fmt.Errorf("custom listener for [%s] is repeated", name)
return
}
l = frpNet.NewCustomListener()
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vm.visitorListeners[name] = l
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vm.skMap[name] = sk
return
}
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func (vm *VisitorManager) NewConn(name string, conn frpNet.Conn, timestamp int64, signKey string,
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useEncryption bool, useCompression bool) (err error) {
vm.mu.RLock()
defer vm.mu.RUnlock()
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if l, ok := vm.visitorListeners[name]; ok {
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var sk string
if sk = vm.skMap[name]; util.GetAuthKey(sk, timestamp) != signKey {
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err = fmt.Errorf("visitor connection of [%s] auth failed", name)
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return
}
var rwc io.ReadWriteCloser = conn
if useEncryption {
if rwc, err = frpIo.WithEncryption(rwc, []byte(sk)); err != nil {
err = fmt.Errorf("create encryption connection failed: %v", err)
return
}
}
if useCompression {
rwc = frpIo.WithCompression(rwc)
}
err = l.PutConn(frpNet.WrapReadWriteCloserToConn(rwc))
} else {
err = fmt.Errorf("custom listener for [%s] doesn't exist", name)
return
}
return
}
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func (vm *VisitorManager) CloseListener(name string) {
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vm.mu.Lock()
defer vm.mu.Unlock()
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delete(vm.visitorListeners, name)
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delete(vm.skMap, name)
}