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validate.go
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validate.go
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// Copyright © 2017 Casey Marshall
//
// 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 cmd
import (
"fmt"
"net"
"regexp"
"strconv"
"github.com/pkg/errors"
)
var (
validateClientNameRE = regexp.MustCompile("^[a-zA-Z][a-zA-Z0-9_-]+$")
validateRemoteNameRE = regexp.MustCompile("^[a-zA-Z][a-zA-Z0-9_-]+$")
)
func IsValidClientName(name string) bool {
return validateClientNameRE.MatchString(name)
}
func IsValidRemoteName(name string) bool {
return validateRemoteNameRE.MatchString(name)
}
func NormalizeAddrPort(addr string) (string, error) {
if host, port, err := net.SplitHostPort(addr); err == nil {
if host == "" {
host = "localhost"
}
portNum, err := strconv.Atoi(port)
if err != nil {
return "", errors.Wrapf(err, "invalid port %q", port)
}
if portNum < 1 || portNum > 65535 {
return "", errors.Errorf("invalid port %q", port)
}
ipAddr, err := net.ResolveIPAddr("ip4", host)
if err != nil {
return "", errors.Wrapf(err, "failed to resolve %q", addr)
}
return fmt.Sprintf("%s:%d", ipAddr.String(), portNum), nil
}
port, err := strconv.Atoi(addr)
if err != nil {
return "", errors.Wrapf(err, "invalid address %q", addr)
}
return fmt.Sprintf("127.0.0.1:%d", port), nil
}