github.com/spotmaxtech/k8s-apimachinery-v0260@v0.0.1/pkg/util/net/util.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes 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 net
    18  
    19  import (
    20  	"errors"
    21  	"net"
    22  	"reflect"
    23  	"syscall"
    24  )
    25  
    26  // IPNetEqual checks if the two input IPNets are representing the same subnet.
    27  // For example,
    28  //
    29  //	10.0.0.1/24 and 10.0.0.0/24 are the same subnet.
    30  //	10.0.0.1/24 and 10.0.0.0/25 are not the same subnet.
    31  func IPNetEqual(ipnet1, ipnet2 *net.IPNet) bool {
    32  	if ipnet1 == nil || ipnet2 == nil {
    33  		return false
    34  	}
    35  	if reflect.DeepEqual(ipnet1.Mask, ipnet2.Mask) && ipnet1.Contains(ipnet2.IP) && ipnet2.Contains(ipnet1.IP) {
    36  		return true
    37  	}
    38  	return false
    39  }
    40  
    41  // Returns if the given err is "connection reset by peer" error.
    42  func IsConnectionReset(err error) bool {
    43  	var errno syscall.Errno
    44  	if errors.As(err, &errno) {
    45  		return errno == syscall.ECONNRESET
    46  	}
    47  	return false
    48  }
    49  
    50  // Returns if the given err is "connection refused" error
    51  func IsConnectionRefused(err error) bool {
    52  	var errno syscall.Errno
    53  	if errors.As(err, &errno) {
    54  		return errno == syscall.ECONNREFUSED
    55  	}
    56  	return false
    57  }