packer/communicator/ssh/connection.go

package ssh

import (
	"net"
	"time"
)

// timeoutConn wraps a net.Conn, and sets a deadline for every read
// and write operation.
type timeoutConn struct {
	net.Conn
	ReadTimeout  time.Duration
	WriteTimeout time.Duration
}

func (c *timeoutConn) Read(b []byte) (int, error) {
	err := c.Conn.SetReadDeadline(time.Now().Add(c.ReadTimeout))
	if err != nil {
		return 0, err
	}
	return c.Conn.Read(b)
}

func (c *timeoutConn) Write(b []byte) (int, error) {
	err := c.Conn.SetWriteDeadline(time.Now().Add(c.WriteTimeout))
	if err != nil {
		return 0, err
	}
	return c.Conn.Write(b)
}