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106 lines
2.6 KiB
106 lines
2.6 KiB
// 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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"sync" |
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libio "github.com/fatedier/golib/io" |
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"github.com/samber/lo" |
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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 !lo.Contains(l.allowUsers, visitorUser) && !lo.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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