Something went wrong. Try again.
forked from tailscale/tailscale
Something went wrong. Try again.
12345678910111213141516171819202122232425262728293031323334353637// Copyright (c) Tailscale Inc & contributors// SPDX-License-Identifier: BSD-3-Clause
// Package ktimeout configures kernel TCP stack timeouts via the provided// control functions. Platform support varies; on unsupported platforms control// functions may be entirely no-ops.package ktimeout
import ( "fmt" "syscall" "time")
// UserTimeout returns a control function that sets the TCP user timeout// (TCP_USER_TIMEOUT on linux). A user timeout specifies the maximum age of// unacknowledged data on the connection (either in buffer, or sent but not// acknowledged) before the connection is terminated. This timer has no effect// on limiting the lifetime of idle connections. This may be entirely local to// the network stack or may also apply RFC 5482 options to packets.func UserTimeout(timeout time.Duration) func(network, address string, c syscall.RawConn) error { return func(network, address string, c syscall.RawConn) error { switch network { case "tcp", "tcp4", "tcp6": default: return fmt.Errorf("ktimeout.UserTimeout: unsupported network: %s", network) } var err error if e := c.Control(func(fd uintptr) { err = SetUserTimeout(fd, timeout) }); e != nil { return e } return err }}