github.com/jingruilea/kubeedge@v1.2.0-beta.0.0.20200410162146-4bb8902b3879/pkg/util/validation/validation.go (about)

     1  /*
     2  Copyright 2019 The KubeEdge Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8     http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package validation
    18  
    19  import (
    20  	"fmt"
    21  	"net"
    22  )
    23  
    24  // IsValidIP tests that the argument is a valid IP address.
    25  func IsValidIP(value string) []string {
    26  	if net.ParseIP(value) == nil {
    27  		return []string{"must be a valid IP address, (e.g. 10.9.8.7)"}
    28  	}
    29  	return nil
    30  }
    31  
    32  // IsValidPortNum tests that the argument is a valid, non-zero port number.
    33  func IsValidPortNum(port int) []string {
    34  	if 1 <= port && port <= 65535 {
    35  		return nil
    36  	}
    37  	return []string{InclusiveRangeError(1, 65535)}
    38  }
    39  
    40  // InclusiveRangeError returns a string explanation of a numeric "must be
    41  // between" validation failure.
    42  func InclusiveRangeError(lo, hi int) string {
    43  	return fmt.Sprintf(`must be between %d and %d, inclusive`, lo, hi)
    44  }