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package ssh
import (
"context"
"net"
"time"
)
type serverConn struct {
net.Conn
idleTimeout time.Duration
maxDeadline time.Time
closeCanceler context.CancelFunc
}
func (c *serverConn) Write(p []byte) (n int, err error) {
c.updateDeadline()
n, err = c.Conn.Write(p)
if _, isNetErr := err.(net.Error); isNetErr && c.closeCanceler != nil {
c.closeCanceler()
}
return
}
func (c *serverConn) Read(b []byte) (n int, err error) {
c.updateDeadline()
n, err = c.Conn.Read(b)
if _, isNetErr := err.(net.Error); isNetErr && c.closeCanceler != nil {
c.closeCanceler()
}
return
}
func (c *serverConn) Close() (err error) {
err = c.Conn.Close()
if c.closeCanceler != nil {
c.closeCanceler()
}
return
}
func (c *serverConn) updateDeadline() {
switch {
case c.idleTimeout > 0:
idleDeadline := time.Now().Add(c.idleTimeout)
if idleDeadline.Unix() < c.maxDeadline.Unix() || c.maxDeadline.IsZero() {
c.Conn.SetDeadline(idleDeadline)
return
}
fallthrough
default:
c.Conn.SetDeadline(c.maxDeadline)
}
}
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