mirror of
https://github.com/fatedier/frp.git
synced 2024-12-13 18:21:14 +01:00
243 lines
5.5 KiB
Go
243 lines
5.5 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 (
|
|
"context"
|
|
"crypto/tls"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"sync/atomic"
|
|
"time"
|
|
|
|
"github.com/fatedier/frp/utils/xlog"
|
|
gnet "github.com/fatedier/golib/net"
|
|
kcp "github.com/fatedier/kcp-go"
|
|
)
|
|
|
|
type ContextGetter interface {
|
|
Context() context.Context
|
|
}
|
|
|
|
type ContextSetter interface {
|
|
WithContext(ctx context.Context)
|
|
}
|
|
|
|
func NewLogFromConn(conn net.Conn) *xlog.Logger {
|
|
if c, ok := conn.(ContextGetter); ok {
|
|
return xlog.FromContextSafe(c.Context())
|
|
}
|
|
return xlog.New()
|
|
}
|
|
|
|
func NewContextFromConn(conn net.Conn) context.Context {
|
|
if c, ok := conn.(ContextGetter); ok {
|
|
return c.Context()
|
|
}
|
|
return context.Background()
|
|
}
|
|
|
|
// ContextConn is the connection with context
|
|
type ContextConn struct {
|
|
net.Conn
|
|
|
|
ctx context.Context
|
|
}
|
|
|
|
func NewContextConn(c net.Conn, ctx context.Context) *ContextConn {
|
|
return &ContextConn{
|
|
Conn: c,
|
|
ctx: ctx,
|
|
}
|
|
}
|
|
|
|
func (c *ContextConn) WithContext(ctx context.Context) {
|
|
c.ctx = ctx
|
|
}
|
|
|
|
func (c *ContextConn) Context() context.Context {
|
|
return c.ctx
|
|
}
|
|
|
|
type WrapReadWriteCloserConn struct {
|
|
io.ReadWriteCloser
|
|
|
|
underConn net.Conn
|
|
}
|
|
|
|
func WrapReadWriteCloserToConn(rwc io.ReadWriteCloser, underConn net.Conn) net.Conn {
|
|
return &WrapReadWriteCloserConn{
|
|
ReadWriteCloser: rwc,
|
|
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")}
|
|
}
|
|
|
|
type CloseNotifyConn struct {
|
|
net.Conn
|
|
|
|
// 1 means closed
|
|
closeFlag int32
|
|
|
|
closeFn func()
|
|
}
|
|
|
|
// closeFn will be only called once
|
|
func WrapCloseNotifyConn(c net.Conn, closeFn func()) net.Conn {
|
|
return &CloseNotifyConn{
|
|
Conn: c,
|
|
closeFn: closeFn,
|
|
}
|
|
}
|
|
|
|
func (cc *CloseNotifyConn) Close() (err error) {
|
|
pflag := atomic.SwapInt32(&cc.closeFlag, 1)
|
|
if pflag == 0 {
|
|
err = cc.Close()
|
|
if cc.closeFn != nil {
|
|
cc.closeFn()
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
type StatsConn struct {
|
|
net.Conn
|
|
|
|
closed int64 // 1 means closed
|
|
totalRead int64
|
|
totalWrite int64
|
|
statsFunc func(totalRead, totalWrite int64)
|
|
}
|
|
|
|
func WrapStatsConn(conn net.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) {
|
|
old := atomic.SwapInt64(&statsConn.closed, 1)
|
|
if old != 1 {
|
|
err = statsConn.Conn.Close()
|
|
if statsConn.statsFunc != nil {
|
|
statsConn.statsFunc(statsConn.totalRead, statsConn.totalWrite)
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func ConnectServer(protocol string, addr string) (c net.Conn, err error) {
|
|
switch protocol {
|
|
case "tcp":
|
|
return net.Dial("tcp", 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 = kcpConn
|
|
return
|
|
default:
|
|
return nil, fmt.Errorf("unsupport protocol: %s", protocol)
|
|
}
|
|
}
|
|
|
|
func ConnectServerByProxy(proxyURL string, protocol string, addr string) (c net.Conn, err error) {
|
|
switch protocol {
|
|
case "tcp":
|
|
return gnet.DialTcpByProxy(proxyURL, addr)
|
|
case "kcp":
|
|
// http proxy is not supported for kcp
|
|
return ConnectServer(protocol, addr)
|
|
case "websocket":
|
|
return ConnectWebsocketServer(addr)
|
|
default:
|
|
return nil, fmt.Errorf("unsupport protocol: %s", protocol)
|
|
}
|
|
}
|
|
|
|
func ConnectServerByProxyWithTLS(proxyUrl string, protocol string, addr string, tlsConfig *tls.Config) (c net.Conn, err error) {
|
|
c, err = ConnectServerByProxy(proxyUrl, protocol, addr)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
if tlsConfig == nil {
|
|
return
|
|
}
|
|
|
|
c = WrapTLSClientConn(c, tlsConfig)
|
|
return
|
|
}
|