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package mssql
import (
"fmt"
"net"
"time"
)
type timeoutConn struct {
c net.Conn
timeout time.Duration
buf *tdsBuffer
packetPending bool
continueRead bool
}
func NewTimeoutConn(conn net.Conn, timeout time.Duration) *timeoutConn {
return &timeoutConn{
c: conn,
timeout: timeout,
}
}
func (c *timeoutConn) Read(b []byte) (n int, err error) {
if c.buf != nil {
if c.packetPending {
c.packetPending = false
err = c.buf.FinishPacket()
if err != nil {
err = fmt.Errorf("Cannot send handshake packet: %s", err.Error())
return
}
c.continueRead = false
}
if !c.continueRead {
var packet packetType
packet, err = c.buf.BeginRead()
if err != nil {
err = fmt.Errorf("Cannot read handshake packet: %s", err.Error())
return
}
if packet != packPrelogin {
err = fmt.Errorf("unexpected packet %d, expecting prelogin", packet)
return
}
c.continueRead = true
}
n, err = c.buf.Read(b)
return
}
err = c.c.SetDeadline(time.Now().Add(c.timeout))
if err != nil {
return
}
return c.c.Read(b)
}
func (c *timeoutConn) Write(b []byte) (n int, err error) {
if c.buf != nil {
if !c.packetPending {
c.buf.BeginPacket(packPrelogin)
c.packetPending = true
}
n, err = c.buf.Write(b)
if err != nil {
return
}
return
}
err = c.c.SetDeadline(time.Now().Add(c.timeout))
if err != nil {
return
}
return c.c.Write(b)
}
func (c timeoutConn) Close() error {
return c.c.Close()
}
func (c timeoutConn) LocalAddr() net.Addr {
return c.c.LocalAddr()
}
func (c timeoutConn) RemoteAddr() net.Addr {
return c.c.RemoteAddr()
}
func (c timeoutConn) SetDeadline(t time.Time) error {
panic("Not implemented")
}
func (c timeoutConn) SetReadDeadline(t time.Time) error {
panic("Not implemented")
}
func (c timeoutConn) SetWriteDeadline(t time.Time) error {
panic("Not implemented")
}
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