mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-11-25 06:31:25 +00:00
55 lines
1.9 KiB
Go
55 lines
1.9 KiB
Go
|
//go:build unix
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright 2023 gRPC authors.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
package internal
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net"
|
||
|
|
"syscall"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"golang.org/x/sys/unix"
|
||
|
|
)
|
||
|
|
|
||
|
|
// NetDialerWithTCPKeepalive returns a net.Dialer that enables TCP keepalives on
|
||
|
|
// the underlying connection with OS default values for keepalive parameters.
|
||
|
|
//
|
||
|
|
// TODO: Once https://github.com/golang/go/issues/62254 lands, and the
|
||
|
|
// appropriate Go version becomes less than our least supported Go version, we
|
||
|
|
// should look into using the new API to make things more straightforward.
|
||
|
|
func NetDialerWithTCPKeepalive() *net.Dialer {
|
||
|
|
return &net.Dialer{
|
||
|
|
// Setting a negative value here prevents the Go stdlib from overriding
|
||
|
|
// the values of TCP keepalive time and interval. It also prevents the
|
||
|
|
// Go stdlib from enabling TCP keepalives by default.
|
||
|
|
KeepAlive: time.Duration(-1),
|
||
|
|
// This method is called after the underlying network socket is created,
|
||
|
|
// but before dialing the socket (or calling its connect() method). The
|
||
|
|
// combination of unconditionally enabling TCP keepalives here, and
|
||
|
|
// disabling the overriding of TCP keepalive parameters by setting the
|
||
|
|
// KeepAlive field to a negative value above, results in OS defaults for
|
||
|
|
// the TCP keealive interval and time parameters.
|
||
|
|
Control: func(_, _ string, c syscall.RawConn) error {
|
||
|
|
return c.Control(func(fd uintptr) {
|
||
|
|
unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_KEEPALIVE, 1)
|
||
|
|
})
|
||
|
|
},
|
||
|
|
}
|
||
|
|
}
|