88 lines
1.4 KiB
Go
88 lines
1.4 KiB
Go
package server
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import (
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"crypto/tls"
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"fmt"
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"net"
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"time"
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)
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type Client struct {
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Name string
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Network string
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Address string
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TLSConfig *tls.Config
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HandshakeTimeout time.Duration
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KeepAlive time.Duration
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LocalAddress net.Addr
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MaxConnections int
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}
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func (c *Client) Dial() (net.Conn, error) {
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if err := c.Validate(); nil != err {
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return nil, err
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}
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var deadline time.Time
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if 0 != c.HandshakeTimeout {
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deadline = time.Now().Add(c.HandshakeTimeout)
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}
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d := &net.Dialer{
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KeepAlive: c.KeepAlive,
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Deadline: deadline,
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LocalAddr: c.LocalAddress,
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}
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conn, err := d.Dial(c.Network, c.Address)
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if nil != err {
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return nil, err
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}
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if nil != c.TLSConfig {
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cfg := c.TLSConfig.Clone()
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tlsConn := tls.Client(conn, cfg)
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if err := tlsConn.Handshake(); err != nil {
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tlsConn.Close()
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return nil, err
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}
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if !cfg.InsecureSkipVerify {
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if err := tlsConn.VerifyHostname(cfg.ServerName); err != nil {
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return nil, err
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}
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}
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conn = tlsConn
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}
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return conn, nil
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}
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func (c *Client) Validate() error {
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if "" == c.Name {
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c.Name = "Client"
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}
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if "" == c.Network {
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return fmt.Errorf("Client: Network is not valid")
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}
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if "" == c.Address {
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return fmt.Errorf("Client: Address is not valid")
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}
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if 0 >= c.MaxConnections {
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c.MaxConnections = 1
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}
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if 0 >= c.KeepAlive {
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c.KeepAlive = DefaultKeepAlive
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}
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if 0 >= c.HandshakeTimeout {
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c.HandshakeTimeout = DefaultHandshakeTimeout
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}
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return nil
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}
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