2016-07-26 11:11:58 -04:00
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package internet
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import (
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2017-02-26 08:38:41 -05:00
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"context"
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"net"
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"time"
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2016-08-20 14:55:45 -04:00
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v2net "v2ray.com/core/common/net"
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)
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var (
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effectiveSystemDialer SystemDialer = DefaultSystemDialer{}
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)
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type SystemDialer interface {
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Dial(ctx context.Context, source v2net.Address, destination v2net.Destination) (net.Conn, error)
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}
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type DefaultSystemDialer struct {
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}
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func (DefaultSystemDialer) Dial(ctx context.Context, src v2net.Address, dest v2net.Destination) (net.Conn, error) {
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dialer := &net.Dialer{
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Timeout: time.Second * 60,
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DualStack: true,
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}
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if src != nil && src != v2net.AnyIP {
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var addr net.Addr
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if dest.Network == v2net.Network_TCP {
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addr = &net.TCPAddr{
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IP: src.IP(),
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Port: 0,
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}
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} else {
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addr = &net.UDPAddr{
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IP: src.IP(),
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Port: 0,
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}
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}
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dialer.LocalAddr = addr
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}
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return dialer.DialContext(ctx, dest.Network.SystemString(), dest.NetAddr())
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}
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type SystemDialerAdapter interface {
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Dial(network string, address string) (net.Conn, error)
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}
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type SimpleSystemDialer struct {
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adapter SystemDialerAdapter
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}
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2016-07-26 11:25:13 -04:00
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func WithAdapter(dialer SystemDialerAdapter) SystemDialer {
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return &SimpleSystemDialer{
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adapter: dialer,
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}
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}
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2017-02-23 17:48:47 -05:00
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func (v *SimpleSystemDialer) Dial(ctx context.Context, src v2net.Address, dest v2net.Destination) (net.Conn, error) {
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return v.adapter.Dial(dest.Network.SystemString(), dest.NetAddr())
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}
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2016-07-26 11:25:13 -04:00
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// UseAlternativeSystemDialer replaces the current system dialer with a given one.
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// Caller must ensure there is no race condition.
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func UseAlternativeSystemDialer(dialer SystemDialer) {
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if dialer == nil {
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effectiveSystemDialer = DefaultSystemDialer{}
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}
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effectiveSystemDialer = dialer
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}
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