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92 lines
1.9 KiB
92 lines
1.9 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/frp/utils/errors"
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frpNet "github.com/fatedier/frp/utils/net"
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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(params map[string]string) (Plugin, error)
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func Register(name string, fn CreatorFn) {
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creators[name] = fn
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}
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func Create(name string, params map[string]string) (p Plugin, err error) {
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if fn, ok := creators[name]; ok {
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p, err = fn(params)
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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 Plugin interface {
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Name() string
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Handle(conn io.ReadWriteCloser, realConn frpNet.Conn)
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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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