mirror of
https://github.com/octoleo/syncthing.git
synced 2024-12-23 03:18:59 +00:00
Add dialer.DialTimeout support
This commit is contained in:
Audrius Butkevicius
parent
e5b33ce9f6
commit
a4b8c2298a
@ -1,102 +0,0 @@
|
||||
// Copyright (C) 2015 The Syncthing Authors.
|
||||
//
|
||||
// This Source Code Form is subject to the terms of the Mozilla Public
|
||||
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
||||
// You can obtain one at http://mozilla.org/MPL/2.0/.
|
||||
|
||||
package dialer
|
||||
|
||||
import (
|
||||
"net"
|
||||
"net/http"
|
||||
"os"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
"golang.org/x/net/proxy"
|
||||
|
||||
"github.com/syncthing/syncthing/lib/logger"
|
||||
"github.com/syncthing/syncthing/lib/osutil"
|
||||
)
|
||||
|
||||
var (
|
||||
l = logger.DefaultLogger.NewFacility("dialer", "Dialing connections")
|
||||
dialer = proxy.FromEnvironment()
|
||||
usingProxy = dialer != proxy.Direct
|
||||
)
|
||||
|
||||
func init() {
|
||||
l.SetDebug("dialer", strings.Contains(os.Getenv("STTRACE"), "dialer") || os.Getenv("STTRACE") == "all")
|
||||
if usingProxy {
|
||||
http.DefaultTransport = &http.Transport{
|
||||
Dial: Dial,
|
||||
Proxy: http.ProxyFromEnvironment,
|
||||
TLSHandshakeTimeout: 10 * time.Second,
|
||||
}
|
||||
|
||||
// Defer this, so that logging gets setup.
|
||||
go func() {
|
||||
time.Sleep(500 * time.Millisecond)
|
||||
l.Infoln("Proxy settings detected")
|
||||
}()
|
||||
}
|
||||
}
|
||||
|
||||
// Dial tries dialing via proxy if a proxy is configured, and falls back to
|
||||
// a direct connection if no proxy is defined, or connecting via proxy fails.
|
||||
func Dial(network, addr string) (net.Conn, error) {
|
||||
if usingProxy {
|
||||
conn, err := dialer.Dial(network, addr)
|
||||
if err == nil {
|
||||
l.Debugf("Dialing %s address %s via proxy - success, %s -> %s", network, addr, conn.LocalAddr(), conn.RemoteAddr())
|
||||
if tcpconn, ok := conn.(*net.TCPConn); ok {
|
||||
osutil.SetTCPOptions(tcpconn)
|
||||
}
|
||||
return dialerConn{
|
||||
conn, newDialerAddr(network, addr),
|
||||
}, nil
|
||||
}
|
||||
l.Debugf("Dialing %s address %s via proxy - error %s", network, addr, err)
|
||||
}
|
||||
|
||||
conn, err := proxy.Direct.Dial(network, addr)
|
||||
if err == nil {
|
||||
l.Debugf("Dialing %s address %s directly - success, %s -> %s", network, addr, conn.LocalAddr(), conn.RemoteAddr())
|
||||
if tcpconn, ok := conn.(*net.TCPConn); ok {
|
||||
osutil.SetTCPOptions(tcpconn)
|
||||
}
|
||||
} else {
|
||||
l.Debugf("Dialing %s address %s directly - error %s", network, addr, err)
|
||||
}
|
||||
return conn, err
|
||||
}
|
||||
|
||||
type dialerConn struct {
|
||||
net.Conn
|
||||
addr net.Addr
|
||||
}
|
||||
|
||||
func (c dialerConn) RemoteAddr() net.Addr {
|
||||
return c.addr
|
||||
}
|
||||
|
||||
func newDialerAddr(network, addr string) net.Addr {
|
||||
netaddr, err := net.ResolveIPAddr(network, addr)
|
||||
if err == nil {
|
||||
return netaddr
|
||||
}
|
||||
return fallbackAddr{network, addr}
|
||||
}
|
||||
|
||||
type fallbackAddr struct {
|
||||
network string
|
||||
addr string
|
||||
}
|
||||
|
||||
func (a fallbackAddr) Network() string {
|
||||
return a.network
|
||||
}
|
||||
|
||||
func (a fallbackAddr) String() string {
|
||||
return a.addr
|
||||
}
|
||||
140
lib/dialer/internal.go
Normal file
140
lib/dialer/internal.go
Normal file
@ -0,0 +1,140 @@
|
||||
// Copyright (C) 2015 The Syncthing Authors.
|
||||
//
|
||||
// This Source Code Form is subject to the terms of the Mozilla Public
|
||||
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
||||
// You can obtain one at http://mozilla.org/MPL/2.0/.
|
||||
|
||||
package dialer
|
||||
|
||||
import (
|
||||
"net"
|
||||
"net/http"
|
||||
"net/url"
|
||||
"os"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
"golang.org/x/net/proxy"
|
||||
|
||||
"github.com/syncthing/syncthing/lib/logger"
|
||||
"github.com/syncthing/syncthing/lib/osutil"
|
||||
)
|
||||
|
||||
var (
|
||||
l = logger.DefaultLogger.NewFacility("dialer", "Dialing connections")
|
||||
proxyDialer = getDialer(proxy.Direct)
|
||||
usingProxy = proxyDialer != proxy.Direct
|
||||
)
|
||||
|
||||
type dialFunc func(network, addr string) (net.Conn, error)
|
||||
|
||||
func init() {
|
||||
l.SetDebug("dialer", strings.Contains(os.Getenv("STTRACE"), "dialer") || os.Getenv("STTRACE") == "all")
|
||||
if usingProxy {
|
||||
http.DefaultTransport = &http.Transport{
|
||||
Dial: Dial,
|
||||
Proxy: http.ProxyFromEnvironment,
|
||||
TLSHandshakeTimeout: 10 * time.Second,
|
||||
}
|
||||
|
||||
// Defer this, so that logging gets setup.
|
||||
go func() {
|
||||
time.Sleep(500 * time.Millisecond)
|
||||
l.Infoln("Proxy settings detected")
|
||||
}()
|
||||
} else {
|
||||
go func() {
|
||||
time.Sleep(500 * time.Millisecond)
|
||||
l.Debugln("Dialer logging disabled, as no proxy was detected")
|
||||
}()
|
||||
}
|
||||
}
|
||||
|
||||
func dialWithFallback(proxyDialFunc dialFunc, fallbackDialFunc dialFunc, network, addr string) (net.Conn, error) {
|
||||
conn, err := proxyDialFunc(network, addr)
|
||||
if err == nil {
|
||||
l.Debugf("Dialing %s address %s via proxy - success, %s -> %s", network, addr, conn.LocalAddr(), conn.RemoteAddr())
|
||||
if tcpconn, ok := conn.(*net.TCPConn); ok {
|
||||
osutil.SetTCPOptions(tcpconn)
|
||||
}
|
||||
return dialerConn{
|
||||
conn, newDialerAddr(network, addr),
|
||||
}, nil
|
||||
}
|
||||
l.Debugf("Dialing %s address %s via proxy - error %s", network, addr, err)
|
||||
|
||||
conn, err = fallbackDialFunc(network, addr)
|
||||
if err == nil {
|
||||
l.Debugf("Dialing %s address %s via fallback - success, %s -> %s", network, addr, conn.LocalAddr(), conn.RemoteAddr())
|
||||
if tcpconn, ok := conn.(*net.TCPConn); ok {
|
||||
osutil.SetTCPOptions(tcpconn)
|
||||
}
|
||||
} else {
|
||||
l.Debugf("Dialing %s address %s via fallback - error %s", network, addr, err)
|
||||
}
|
||||
return conn, err
|
||||
}
|
||||
|
||||
// This is a rip off of proxy.FromEnvironment with a custom forward dialer
|
||||
func getDialer(forward proxy.Dialer) proxy.Dialer {
|
||||
allProxy := os.Getenv("all_proxy")
|
||||
if len(allProxy) == 0 {
|
||||
return forward
|
||||
}
|
||||
|
||||
proxyURL, err := url.Parse(allProxy)
|
||||
if err != nil {
|
||||
return forward
|
||||
}
|
||||
prxy, err := proxy.FromURL(proxyURL, forward)
|
||||
if err != nil {
|
||||
return forward
|
||||
}
|
||||
|
||||
noProxy := os.Getenv("no_proxy")
|
||||
if len(noProxy) == 0 {
|
||||
return prxy
|
||||
}
|
||||
|
||||
perHost := proxy.NewPerHost(prxy, forward)
|
||||
perHost.AddFromString(noProxy)
|
||||
return perHost
|
||||
}
|
||||
|
||||
type timeoutDirectDialer struct {
|
||||
timeout time.Duration
|
||||
}
|
||||
|
||||
func (d *timeoutDirectDialer) Dial(network, addr string) (net.Conn, error) {
|
||||
return net.DialTimeout(network, addr, d.timeout)
|
||||
}
|
||||
|
||||
type dialerConn struct {
|
||||
net.Conn
|
||||
addr net.Addr
|
||||
}
|
||||
|
||||
func (c dialerConn) RemoteAddr() net.Addr {
|
||||
return c.addr
|
||||
}
|
||||
|
||||
func newDialerAddr(network, addr string) net.Addr {
|
||||
netaddr, err := net.ResolveIPAddr(network, addr)
|
||||
if err == nil {
|
||||
return netaddr
|
||||
}
|
||||
return fallbackAddr{network, addr}
|
||||
}
|
||||
|
||||
type fallbackAddr struct {
|
||||
network string
|
||||
addr string
|
||||
}
|
||||
|
||||
func (a fallbackAddr) Network() string {
|
||||
return a.network
|
||||
}
|
||||
|
||||
func (a fallbackAddr) String() string {
|
||||
return a.addr
|
||||
}
|
||||
48
lib/dialer/public.go
Normal file
48
lib/dialer/public.go
Normal file
@ -0,0 +1,48 @@
|
||||
// Copyright (C) 2015 The Syncthing Authors.
|
||||
//
|
||||
// This Source Code Form is subject to the terms of the Mozilla Public
|
||||
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
||||
// You can obtain one at http://mozilla.org/MPL/2.0/.
|
||||
|
||||
package dialer
|
||||
|
||||
import (
|
||||
"net"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Dial tries dialing via proxy if a proxy is configured, and falls back to
|
||||
// a direct connection if no proxy is defined, or connecting via proxy fails.
|
||||
func Dial(network, addr string) (net.Conn, error) {
|
||||
if usingProxy {
|
||||
return dialWithFallback(proxyDialer.Dial, net.Dial, network, addr)
|
||||
}
|
||||
return net.Dial(network, addr)
|
||||
}
|
||||
|
||||
// DialTimeout tries dialing via proxy with a timeout if a proxy is configured,
|
||||
// and falls back to a direct connection if no proxy is defined, or connecting
|
||||
// via proxy fails. The timeout can potentially be applied twice, once trying
|
||||
// to connect via the proxy connection, and second time trying to connect
|
||||
// directly.
|
||||
func DialTimeout(network, addr string, timeout time.Duration) (net.Conn, error) {
|
||||
if usingProxy {
|
||||
// Because the proxy package is poorly structured, we have to
|
||||
// construct a struct that matches proxy.Dialer but has a timeout
|
||||
// and reconstrcut the proxy dialer using that, in order to be able to
|
||||
// set a timeout.
|
||||
dd := &timeoutDirectDialer{
|
||||
timeout: timeout,
|
||||
}
|
||||
// Check if the dialer we are getting is not timeoutDirectDialer we just
|
||||
// created. It could happen that usingProxy is true, but getDialer
|
||||
// returns timeoutDirectDialer due to env vars changing.
|
||||
if timeoutProxyDialer := getDialer(dd); timeoutProxyDialer != dd {
|
||||
directDialFunc := func(inetwork, iaddr string) (net.Conn, error) {
|
||||
return net.DialTimeout(inetwork, iaddr, timeout)
|
||||
}
|
||||
return dialWithFallback(timeoutProxyDialer.Dial, directDialFunc, network, addr)
|
||||
}
|
||||
}
|
||||
return net.DialTimeout(network, addr, timeout)
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user