mirror of
https://github.com/fatedier/frp.git
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102 lines
2.3 KiB
Go
102 lines
2.3 KiB
Go
// 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 net
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import (
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"fmt"
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"net"
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"github.com/fatedier/frp/utils/log"
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kcp "github.com/fatedier/kcp-go"
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)
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type KcpListener struct {
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net.Addr
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listener net.Listener
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accept chan Conn
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closeFlag bool
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log.Logger
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}
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func ListenKcp(bindAddr string, bindPort int) (l *KcpListener, err error) {
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listener, err := kcp.ListenWithOptions(fmt.Sprintf("%s:%d", bindAddr, bindPort), nil, 10, 3)
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if err != nil {
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return l, err
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}
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listener.SetReadBuffer(4194304)
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listener.SetWriteBuffer(4194304)
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l = &KcpListener{
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Addr: listener.Addr(),
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listener: listener,
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accept: make(chan Conn),
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closeFlag: false,
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Logger: log.NewPrefixLogger(""),
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}
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go func() {
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for {
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conn, err := listener.AcceptKCP()
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if err != nil {
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if l.closeFlag {
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close(l.accept)
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return
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}
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continue
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}
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conn.SetStreamMode(true)
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conn.SetWriteDelay(true)
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conn.SetNoDelay(1, 20, 2, 1)
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conn.SetMtu(1350)
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conn.SetWindowSize(1024, 1024)
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conn.SetACKNoDelay(false)
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l.accept <- WrapConn(conn)
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}
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}()
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return l, err
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}
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func (l *KcpListener) Accept() (Conn, error) {
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conn, ok := <-l.accept
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if !ok {
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return conn, fmt.Errorf("channel for kcp listener closed")
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}
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return conn, nil
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}
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func (l *KcpListener) Close() error {
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if !l.closeFlag {
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l.closeFlag = true
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l.listener.Close()
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}
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return nil
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}
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func NewKcpConnFromUdp(conn *net.UDPConn, connected bool, raddr string) (net.Conn, error) {
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kcpConn, err := kcp.NewConnEx(1, connected, raddr, nil, 10, 3, conn)
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if err != nil {
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return nil, err
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}
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kcpConn.SetStreamMode(true)
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kcpConn.SetWriteDelay(true)
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kcpConn.SetNoDelay(1, 20, 2, 1)
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kcpConn.SetMtu(1350)
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kcpConn.SetWindowSize(1024, 1024)
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kcpConn.SetACKNoDelay(false)
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return kcpConn, nil
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}
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