/
tcp.go
73 lines (64 loc) · 2.43 KB
/
tcp.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 transport
import (
"fmt"
"net"
"strings"
"time"
"github.com/elastic/beats/v7/libbeat/logp"
"github.com/elastic/beats/v7/libbeat/testing"
)
func NetDialer(timeout time.Duration) Dialer {
return TestNetDialer(testing.NullDriver, timeout)
}
func TestNetDialer(d testing.Driver, timeout time.Duration) Dialer {
return DialerFunc(func(network, address string) (net.Conn, error) {
switch network {
case "tcp", "tcp4", "tcp6", "udp", "udp4", "udp6":
default:
d.Fatal("network type", fmt.Errorf("unsupported network type %v", network))
return nil, fmt.Errorf("unsupported network type %v", network)
}
host, port, err := net.SplitHostPort(address)
d.Fatal("parse host", err)
if err != nil {
return nil, err
}
addresses, err := net.LookupHost(host)
d.Fatal("dns lookup", err)
d.Info("addresses", strings.Join(addresses, ", "))
if err != nil {
logp.NewLogger(logSelector).Warnf(`DNS lookup failure "%s": %+v`, host, err)
return nil, err
}
// dial via host IP by randomized iteration of known IPs
dialer := &net.Dialer{Timeout: timeout}
return DialWith(dialer, network, host, addresses, port)
})
}
// UnixDialer creates a Unix Dialer when using unix domain socket.
func UnixDialer(timeout time.Duration, sockFile string) Dialer {
return TestUnixDialer(testing.NullDriver, timeout, sockFile)
}
// TestUnixDialer creates a Test Unix Dialer when using domain socket.
func TestUnixDialer(d testing.Driver, timeout time.Duration, sockFile string) Dialer {
return DialerFunc(func(network, address string) (net.Conn, error) {
d.Info("connecting using unix domain socket", sockFile)
return net.DialTimeout("unix", sockFile, timeout)
})
}