mirror of
https://github.com/e1732a364fed/v2ray_simple.git
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119 lines
2.5 KiB
Go
119 lines
2.5 KiB
Go
package netLayer
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import (
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"crypto/tls"
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"net"
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"syscall"
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"time"
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)
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func (addr *Addr) Dial() (net.Conn, error) {
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//log.Println("Dial called", addr, addr.Network)
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var istls bool
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var resultConn net.Conn
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var err error
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switch addr.Network {
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case "":
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addr.Network = "tcp"
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goto tcp
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case "tcp", "tcp4", "tcp6":
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goto tcp
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case "tls": //此形式目前被用于dns配置中 的 dns over tls 的 url中
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istls = true
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goto tcp
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case "udp", "udp4", "udp6":
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ua := addr.ToUDPAddr()
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if !machineCanConnectToIpv6 && addr.IP.To4() == nil {
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return nil, ErrMachineCantConnectToIpv6
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}
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return DialUDP(ua)
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default:
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goto defaultPart
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}
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tcp:
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//dialer := &net.Dialer{
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// Timeout: time.Second * 16,
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//}
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//本以为直接用 DialTCP 可以加速拨号，结果发现go官方包内部依然还是把地址转换回字符串再拨号
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//另外，为了为以后支持 tproxy、bindToDevice、SO_MARK 作准备，我们还是要选择性使用 net.Dialer.
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//fastopen 不予支持, 因为自己客户端在重重网关之下，不可能让层层网关都支持tcp fast open；
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// 而自己的远程节点的话因为本来网速就很快, 也不需要fastopen，总之 因为木桶原理，慢的地方在我们层层网关, 所以fastopen 意义不大.
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if addr.IP != nil {
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if addr.IP.To4() == nil {
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if !machineCanConnectToIpv6 {
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return nil, ErrMachineCantConnectToIpv6
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} else {
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resultConn, err = net.DialTCP("tcp6", nil, &net.TCPAddr{
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IP: addr.IP,
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Port: addr.Port,
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})
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goto dialedPart
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}
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} else {
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resultConn, err = net.DialTCP("tcp4", nil, &net.TCPAddr{
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IP: addr.IP,
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Port: addr.Port,
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})
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goto dialedPart
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}
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}
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defaultPart:
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resultConn, err = net.Dial(addr.Network, addr.String())
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dialedPart:
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if istls && err == nil {
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conf := &tls.Config{}
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if addr.Name != "" {
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conf.ServerName = addr.Name
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} else {
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conf.InsecureSkipVerify = true
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}
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tlsconn := tls.Client(resultConn, conf)
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err = tlsconn.Handshake()
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return tlsconn, err
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}
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return resultConn, err
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}
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func (addr Addr) DialWithOpt(sockopt *Sockopt) (net.Conn, error) {
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dialer := &net.Dialer{
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Timeout: time.Second * 16,
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}
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dialer.Control = func(network, address string, c syscall.RawConn) error {
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return c.Control(func(fd uintptr) {
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if sockopt != nil {
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if sockopt.Somark != 0 {
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SetSomark(int(fd), sockopt.Somark)
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}
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if sockopt.TProxy {
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SetTproxy(int(fd))
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}
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}
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})
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}
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return dialer.Dial(addr.Network, addr.String())
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}
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