mirror of
https://github.com/fatedier/frp.git
synced 2024-12-16 03:19:00 +08:00
93 lines
2.0 KiB
Go
93 lines
2.0 KiB
Go
// 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.
|
|
|
|
package plugin
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"sync"
|
|
|
|
"github.com/fatedier/golib/errors"
|
|
)
|
|
|
|
// Creators is used for create plugins to handle connections.
|
|
var creators = make(map[string]CreatorFn)
|
|
|
|
// params has prefix "plugin_"
|
|
type CreatorFn func(params map[string]string) (Plugin, error)
|
|
|
|
func Register(name string, fn CreatorFn) {
|
|
creators[name] = fn
|
|
}
|
|
|
|
func Create(name string, params map[string]string) (p Plugin, err error) {
|
|
if fn, ok := creators[name]; ok {
|
|
p, err = fn(params)
|
|
} else {
|
|
err = fmt.Errorf("plugin [%s] is not registered", name)
|
|
}
|
|
return
|
|
}
|
|
|
|
type Plugin interface {
|
|
Name() string
|
|
|
|
// extraBufToLocal will send to local connection first, then join conn with local connection
|
|
Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte)
|
|
Close() error
|
|
}
|
|
|
|
type Listener struct {
|
|
conns chan net.Conn
|
|
closed bool
|
|
mu sync.Mutex
|
|
}
|
|
|
|
func NewProxyListener() *Listener {
|
|
return &Listener{
|
|
conns: make(chan net.Conn, 64),
|
|
}
|
|
}
|
|
|
|
func (l *Listener) Accept() (net.Conn, error) {
|
|
conn, ok := <-l.conns
|
|
if !ok {
|
|
return nil, fmt.Errorf("listener closed")
|
|
}
|
|
return conn, nil
|
|
}
|
|
|
|
func (l *Listener) PutConn(conn net.Conn) error {
|
|
err := errors.PanicToError(func() {
|
|
l.conns <- conn
|
|
})
|
|
return err
|
|
}
|
|
|
|
func (l *Listener) Close() error {
|
|
l.mu.Lock()
|
|
defer l.mu.Unlock()
|
|
if !l.closed {
|
|
close(l.conns)
|
|
l.closed = true
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (l *Listener) Addr() net.Addr {
|
|
return (*net.TCPAddr)(nil)
|
|
}
|