icmp_linux.go raw

   1  // Copyright 2014 The Go Authors. All rights reserved.
   2  // Use of this source code is governed by a BSD-style
   3  // license that can be found in the LICENSE file.
   4  
   5  package ipv4
   6  
   7  func (f *icmpFilter) accept(typ ICMPType) {
   8  	f.Data &^= 1 << (uint32(typ) & 31)
   9  }
  10  
  11  func (f *icmpFilter) block(typ ICMPType) {
  12  	f.Data |= 1 << (uint32(typ) & 31)
  13  }
  14  
  15  func (f *icmpFilter) setAll(block bool) {
  16  	if block {
  17  		f.Data = 1<<32 - 1
  18  	} else {
  19  		f.Data = 0
  20  	}
  21  }
  22  
  23  func (f *icmpFilter) willBlock(typ ICMPType) bool {
  24  	return f.Data&(1<<(uint32(typ)&31)) != 0
  25  }
  26