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ipaddressport.go
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/
ipaddressport.go
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// Copyright 2015 CoreOS, Inc.
//
// 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 flags
import (
"errors"
"net"
"strconv"
"strings"
)
// IPAddressPort implements the flag.Value interface. The argument
// is validated as "ip:port".
type IPAddressPort struct {
IP string
Port int
}
func (a *IPAddressPort) Set(arg string) error {
arg = strings.TrimSpace(arg)
host, portStr, err := net.SplitHostPort(arg)
if err != nil {
return err
}
if net.ParseIP(host) == nil {
return errors.New("bad IP in address specification")
}
port, err := strconv.Atoi(portStr)
if err != nil {
return errors.New("bad port in address specification")
}
a.IP = host
a.Port = port
return nil
}
func (a *IPAddressPort) String() string {
return net.JoinHostPort(a.IP, strconv.Itoa(a.Port))
}