mirror of
https://github.com/fatedier/frp.git
synced 2024-12-15 10:58:59 +08:00
212 lines
4.8 KiB
Go
212 lines
4.8 KiB
Go
// Copyright 2016 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 net
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/fatedier/frp/utils/log"
|
|
|
|
kcp "github.com/xtaci/kcp-go"
|
|
)
|
|
|
|
// Conn is the interface of connections used in frp.
|
|
type Conn interface {
|
|
net.Conn
|
|
log.Logger
|
|
}
|
|
|
|
type WrapLogConn struct {
|
|
net.Conn
|
|
log.Logger
|
|
}
|
|
|
|
func WrapConn(c net.Conn) Conn {
|
|
return &WrapLogConn{
|
|
Conn: c,
|
|
Logger: log.NewPrefixLogger(""),
|
|
}
|
|
}
|
|
|
|
type WrapReadWriteCloserConn struct {
|
|
io.ReadWriteCloser
|
|
log.Logger
|
|
|
|
underConn net.Conn
|
|
}
|
|
|
|
func WrapReadWriteCloserToConn(rwc io.ReadWriteCloser, underConn net.Conn) Conn {
|
|
return &WrapReadWriteCloserConn{
|
|
ReadWriteCloser: rwc,
|
|
Logger: log.NewPrefixLogger(""),
|
|
underConn: underConn,
|
|
}
|
|
}
|
|
|
|
func (conn *WrapReadWriteCloserConn) LocalAddr() net.Addr {
|
|
if conn.underConn != nil {
|
|
return conn.underConn.LocalAddr()
|
|
}
|
|
return (*net.TCPAddr)(nil)
|
|
}
|
|
|
|
func (conn *WrapReadWriteCloserConn) RemoteAddr() net.Addr {
|
|
if conn.underConn != nil {
|
|
return conn.underConn.RemoteAddr()
|
|
}
|
|
return (*net.TCPAddr)(nil)
|
|
}
|
|
|
|
func (conn *WrapReadWriteCloserConn) SetDeadline(t time.Time) error {
|
|
if conn.underConn != nil {
|
|
return conn.underConn.SetDeadline(t)
|
|
}
|
|
return &net.OpError{Op: "set", Net: "wrap", Source: nil, Addr: nil, Err: errors.New("deadline not supported")}
|
|
}
|
|
|
|
func (conn *WrapReadWriteCloserConn) SetReadDeadline(t time.Time) error {
|
|
if conn.underConn != nil {
|
|
return conn.underConn.SetReadDeadline(t)
|
|
}
|
|
return &net.OpError{Op: "set", Net: "wrap", Source: nil, Addr: nil, Err: errors.New("deadline not supported")}
|
|
}
|
|
|
|
func (conn *WrapReadWriteCloserConn) SetWriteDeadline(t time.Time) error {
|
|
if conn.underConn != nil {
|
|
return conn.underConn.SetWriteDeadline(t)
|
|
}
|
|
return &net.OpError{Op: "set", Net: "wrap", Source: nil, Addr: nil, Err: errors.New("deadline not supported")}
|
|
}
|
|
|
|
func ConnectServer(protocol string, addr string) (c Conn, err error) {
|
|
switch protocol {
|
|
case "tcp":
|
|
return ConnectTcpServer(addr)
|
|
case "kcp":
|
|
kcpConn, errRet := kcp.DialWithOptions(addr, nil, 10, 3)
|
|
if errRet != nil {
|
|
err = errRet
|
|
return
|
|
}
|
|
kcpConn.SetStreamMode(true)
|
|
kcpConn.SetWriteDelay(true)
|
|
kcpConn.SetNoDelay(1, 20, 2, 1)
|
|
kcpConn.SetWindowSize(128, 512)
|
|
kcpConn.SetMtu(1350)
|
|
kcpConn.SetACKNoDelay(false)
|
|
kcpConn.SetReadBuffer(4194304)
|
|
kcpConn.SetWriteBuffer(4194304)
|
|
c = WrapConn(kcpConn)
|
|
return
|
|
default:
|
|
return nil, fmt.Errorf("unsupport protocol: %s", protocol)
|
|
}
|
|
}
|
|
|
|
func ConnectServerByHttpProxy(httpProxy string, protocol string, addr string) (c Conn, err error) {
|
|
switch protocol {
|
|
case "tcp":
|
|
return ConnectTcpServerByHttpProxy(httpProxy, addr)
|
|
case "kcp":
|
|
// http proxy is not supported for kcp
|
|
return ConnectServer(protocol, addr)
|
|
default:
|
|
return nil, fmt.Errorf("unsupport protocol: %s", protocol)
|
|
}
|
|
}
|
|
|
|
type SharedConn struct {
|
|
Conn
|
|
sync.Mutex
|
|
buf *bytes.Buffer
|
|
}
|
|
|
|
// the bytes you read in io.Reader, will be reserved in SharedConn
|
|
func NewShareConn(conn Conn) (*SharedConn, io.Reader) {
|
|
sc := &SharedConn{
|
|
Conn: conn,
|
|
buf: bytes.NewBuffer(make([]byte, 0, 1024)),
|
|
}
|
|
return sc, io.TeeReader(conn, sc.buf)
|
|
}
|
|
|
|
func (sc *SharedConn) Read(p []byte) (n int, err error) {
|
|
sc.Lock()
|
|
if sc.buf == nil {
|
|
sc.Unlock()
|
|
return sc.Conn.Read(p)
|
|
}
|
|
sc.Unlock()
|
|
n, err = sc.buf.Read(p)
|
|
|
|
if err == io.EOF {
|
|
sc.Lock()
|
|
sc.buf = nil
|
|
sc.Unlock()
|
|
var n2 int
|
|
n2, err = sc.Conn.Read(p[n:])
|
|
|
|
n += n2
|
|
}
|
|
return
|
|
}
|
|
|
|
func (sc *SharedConn) WriteBuff(buffer []byte) (err error) {
|
|
sc.buf.Reset()
|
|
_, err = sc.buf.Write(buffer)
|
|
return err
|
|
}
|
|
|
|
type StatsConn struct {
|
|
Conn
|
|
|
|
totalRead int64
|
|
totalWrite int64
|
|
statsFunc func(totalRead, totalWrite int64)
|
|
}
|
|
|
|
func WrapStatsConn(conn Conn, statsFunc func(total, totalWrite int64)) *StatsConn {
|
|
return &StatsConn{
|
|
Conn: conn,
|
|
statsFunc: statsFunc,
|
|
}
|
|
}
|
|
|
|
func (statsConn *StatsConn) Read(p []byte) (n int, err error) {
|
|
n, err = statsConn.Conn.Read(p)
|
|
statsConn.totalRead += int64(n)
|
|
return
|
|
}
|
|
|
|
func (statsConn *StatsConn) Write(p []byte) (n int, err error) {
|
|
n, err = statsConn.Conn.Write(p)
|
|
statsConn.totalWrite += int64(n)
|
|
return
|
|
}
|
|
|
|
func (statsConn *StatsConn) Close() (err error) {
|
|
err = statsConn.Conn.Close()
|
|
if statsConn.statsFunc != nil {
|
|
statsConn.statsFunc(statsConn.totalRead, statsConn.totalWrite)
|
|
}
|
|
return
|
|
}
|