59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
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package main
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import (
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"fmt"
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"log"
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"net"
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"time"
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"github.com/gliderlabs/ssh"
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)
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var (
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MaxLifeTimeout = 30 * time.Second
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IdleTimeout = 5 * time.Second
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)
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type timeoutConn struct {
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net.Conn
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maxlife time.Time
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idle time.Time
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}
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func (c *timeoutConn) Write(p []byte) (n int, err error) {
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c.updateDeadline()
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return c.Conn.Write(p)
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}
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func (c *timeoutConn) Read(b []byte) (n int, err error) {
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c.idle = time.Now().Add(IdleTimeout)
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c.updateDeadline()
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return c.Conn.Read(b)
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}
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func (c *timeoutConn) updateDeadline() {
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if c.idle.Unix() < c.maxlife.Unix() {
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c.Conn.SetDeadline(c.idle)
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} else {
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c.Conn.SetDeadline(c.maxlife)
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}
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}
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func main() {
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ssh.Handle(func(s ssh.Session) {
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i := 0
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for {
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i += 1
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fmt.Fprintln(s, i)
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time.Sleep(time.Second)
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}
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})
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log.Println("starting ssh server on port 2222...")
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log.Printf("connections will only last %s\n", MaxLifeTimeout)
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log.Printf("and timeout after %s of no client activity\n", IdleTimeout)
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log.Fatal(ssh.ListenAndServe(":2222", nil, ssh.WrapConn(func(conn net.Conn) net.Conn {
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return &timeoutConn{conn, time.Now().Add(MaxLifeTimeout), time.Now().Add(IdleTimeout)}
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})))
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}
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