61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package zgrab2
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import (
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"net"
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"time"
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)
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// TimeoutConnection wraps an existing net.Conn connection, overriding the Read/Write methods to use the configured timeouts
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type TimeoutConnection struct {
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net.Conn
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Timeout time.Duration
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}
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// TimeoutConnection.Read calls Read() on the underlying connection, using any configured deadlines
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func (c *TimeoutConnection) Read(b []byte) (n int, err error) {
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if c.Timeout > 0 {
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if err = c.Conn.SetReadDeadline(time.Now().Add(c.Timeout)); err != nil {
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return 0, err
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}
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}
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return c.Conn.Read(b)
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}
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// TimeoutConnection.Write calls Write() on the underlying connection, using any configured deadlines
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func (c *TimeoutConnection) Write(b []byte) (n int, err error) {
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if c.Timeout > 0 {
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if err = c.Conn.SetWriteDeadline(time.Now().Add(c.Timeout)); err != nil {
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return 0, err
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}
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}
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return c.Conn.Write(b)
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}
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// GetTimeoutDialer returns a Dialer function that dials with the given timeout
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func GetTimeoutDialer(timeout time.Duration) func(string, string) (net.Conn, error) {
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return func(proto, target string) (net.Conn, error) {
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return DialTimeoutConnection(proto, target, timeout)
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}
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}
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// DialTimeoutConnection dials the target and returns a net.Conn that uses the configured timeouts for Read/Write operations.
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func DialTimeoutConnection(proto string, target string, timeout time.Duration) (net.Conn, error) {
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var conn net.Conn
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var err error
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if timeout > 0 {
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conn, err = net.DialTimeout(proto, target, timeout)
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} else {
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conn, err = net.Dial(proto, target)
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}
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if err != nil {
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if conn != nil {
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conn.Close()
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}
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return nil, err
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}
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return &TimeoutConnection{
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Conn: conn,
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Timeout: timeout,
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}, nil
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}
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