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icmp_linux.go (538B)

      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 }