mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-11-24 14:11:25 +00:00
63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
// Copyright 2023 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build linux
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// +build linux
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package grpctransport
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import (
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"context"
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"net"
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"syscall"
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"google.golang.org/grpc"
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)
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const (
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// defaultTCPUserTimeout is the default TCP_USER_TIMEOUT socket option. By
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// default is 20 seconds.
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tcpUserTimeoutMilliseconds = 20000
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// Copied from golang.org/x/sys/unix.TCP_USER_TIMEOUT.
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tcpUserTimeoutOp = 0x12
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)
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func init() {
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// timeoutDialerOption is a grpc.DialOption that contains dialer with
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// socket option TCP_USER_TIMEOUT. This dialer requires go versions 1.11+.
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timeoutDialerOption = grpc.WithContextDialer(dialTCPUserTimeout)
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}
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func dialTCPUserTimeout(ctx context.Context, addr string) (net.Conn, error) {
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control := func(network, address string, c syscall.RawConn) error {
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var syscallErr error
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controlErr := c.Control(func(fd uintptr) {
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syscallErr = syscall.SetsockoptInt(
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int(fd), syscall.IPPROTO_TCP, tcpUserTimeoutOp, tcpUserTimeoutMilliseconds)
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})
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if syscallErr != nil {
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return syscallErr
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}
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if controlErr != nil {
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return controlErr
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}
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return nil
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}
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d := &net.Dialer{
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Control: control,
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}
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return d.DialContext(ctx, "tcp", addr)
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}
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