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101 lines
2.2 KiB
101 lines
2.2 KiB
// Copyright 2017 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 plugin |
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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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"github.com/fatedier/golib/errors" |
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pp "github.com/pires/go-proxyproto" |
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v1 "github.com/fatedier/frp/pkg/config/v1" |
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) |
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// Creators is used for create plugins to handle connections. |
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var creators = make(map[string]CreatorFn) |
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// params has prefix "plugin_" |
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type CreatorFn func(options v1.ClientPluginOptions) (Plugin, error) |
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func Register(name string, fn CreatorFn) { |
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if _, exist := creators[name]; exist { |
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panic(fmt.Sprintf("plugin [%s] is already registered", name)) |
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} |
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creators[name] = fn |
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} |
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func Create(name string, options v1.ClientPluginOptions) (p Plugin, err error) { |
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if fn, ok := creators[name]; ok { |
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p, err = fn(options) |
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} else { |
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err = fmt.Errorf("plugin [%s] is not registered", name) |
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} |
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return |
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} |
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type ExtraInfo struct { |
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ProxyProtocolHeader *pp.Header |
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} |
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type Plugin interface { |
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Name() string |
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Handle(conn io.ReadWriteCloser, realConn net.Conn, extra *ExtraInfo) |
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Close() error |
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} |
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type Listener struct { |
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conns chan net.Conn |
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closed bool |
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mu sync.Mutex |
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} |
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func NewProxyListener() *Listener { |
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return &Listener{ |
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conns: make(chan net.Conn, 64), |
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} |
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} |
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func (l *Listener) Accept() (net.Conn, error) { |
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conn, ok := <-l.conns |
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if !ok { |
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return nil, fmt.Errorf("listener closed") |
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} |
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return conn, nil |
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} |
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func (l *Listener) PutConn(conn net.Conn) error { |
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err := errors.PanicToError(func() { |
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l.conns <- conn |
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}) |
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return err |
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} |
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func (l *Listener) Close() error { |
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l.mu.Lock() |
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defer l.mu.Unlock() |
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if !l.closed { |
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close(l.conns) |
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l.closed = true |
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} |
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return nil |
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} |
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func (l *Listener) Addr() net.Addr { |
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return (*net.TCPAddr)(nil) |
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}
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