mirror of https://github.com/fatedier/frp
107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
// Copyright 2019 fatedier, fatedier@gmail.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package visitor
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import (
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"fmt"
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"io"
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"net"
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"slices"
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"sync"
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libio "github.com/fatedier/golib/io"
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netpkg "github.com/fatedier/frp/pkg/util/net"
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"github.com/fatedier/frp/pkg/util/util"
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)
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type listenerBundle struct {
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l *netpkg.InternalListener
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sk string
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allowUsers []string
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}
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// Manager for visitor listeners.
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type Manager struct {
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listeners map[string]*listenerBundle
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mu sync.RWMutex
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}
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func NewManager() *Manager {
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return &Manager{
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listeners: make(map[string]*listenerBundle),
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}
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}
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func (vm *Manager) Listen(name string, sk string, allowUsers []string) (*netpkg.InternalListener, error) {
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vm.mu.Lock()
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defer vm.mu.Unlock()
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if _, ok := vm.listeners[name]; ok {
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return nil, fmt.Errorf("custom listener for [%s] is repeated", name)
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}
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l := netpkg.NewInternalListener()
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vm.listeners[name] = &listenerBundle{
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l: l,
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sk: sk,
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allowUsers: allowUsers,
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}
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return l, nil
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}
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func (vm *Manager) NewConn(name string, conn net.Conn, timestamp int64, signKey string,
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useEncryption bool, useCompression bool, visitorUser string,
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) (err error) {
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vm.mu.RLock()
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defer vm.mu.RUnlock()
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if l, ok := vm.listeners[name]; ok {
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if util.GetAuthKey(l.sk, timestamp) != signKey {
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err = fmt.Errorf("visitor connection of [%s] auth failed", name)
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return
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}
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if !slices.Contains(l.allowUsers, visitorUser) && !slices.Contains(l.allowUsers, "*") {
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err = fmt.Errorf("visitor connection of [%s] user [%s] not allowed", name, visitorUser)
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return
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}
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var rwc io.ReadWriteCloser = conn
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if useEncryption {
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if rwc, err = libio.WithEncryption(rwc, []byte(l.sk)); err != nil {
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err = fmt.Errorf("create encryption connection failed: %v", err)
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return
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}
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}
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if useCompression {
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rwc = libio.WithCompression(rwc)
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}
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err = l.l.PutConn(netpkg.WrapReadWriteCloserToConn(rwc, conn))
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} else {
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err = fmt.Errorf("custom listener for [%s] doesn't exist", name)
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return
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}
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return
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}
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func (vm *Manager) CloseListener(name string) {
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vm.mu.Lock()
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defer vm.mu.Unlock()
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delete(vm.listeners, name)
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}
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