statsd_exporter/pkg/util/util.go

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// Copyright 2013 The Prometheus 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 util
import (
"fmt"
"net"
"strconv"
)
func IPPortFromString(addr string) (*net.IPAddr, int, error) {
host, portStr, err := net.SplitHostPort(addr)
if err != nil {
return nil, 0, fmt.Errorf("bad StatsD listening address: %s", addr)
}
if host == "" {
host = "0.0.0.0"
}
ip, err := net.ResolveIPAddr("ip", host)
if err != nil {
return nil, 0, fmt.Errorf("Unable to resolve %s: %s", host, err)
}
port, err := strconv.Atoi(portStr)
if err != nil || port < 0 || port > 65535 {
return nil, 0, fmt.Errorf("Bad port %s: %s", portStr, err)
}
return ip, port, nil
}
func UDPAddrFromString(addr string) (*net.UDPAddr, error) {
ip, port, err := IPPortFromString(addr)
if err != nil {
return nil, err
}
return &net.UDPAddr{
IP: ip.IP,
Port: port,
Zone: ip.Zone,
}, nil
}
func TCPAddrFromString(addr string) (*net.TCPAddr, error) {
ip, port, err := IPPortFromString(addr)
if err != nil {
return nil, err
}
return &net.TCPAddr{
IP: ip.IP,
Port: port,
Zone: ip.Zone,
}, nil
}