| // Copyright 2014 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package ipv4 |
| |
| func (f *icmpFilter) accept(typ ICMPType) { |
| f.Data &^= 1 << (uint32(typ) & 31) |
| } |
| |
| func (f *icmpFilter) block(typ ICMPType) { |
| f.Data |= 1 << (uint32(typ) & 31) |
| } |
| |
| func (f *icmpFilter) setAll(block bool) { |
| if block { |
| f.Data = 1<<32 - 1 |
| } else { |
| f.Data = 0 |
| } |
| } |
| |
| func (f *icmpFilter) willBlock(typ ICMPType) bool { |
| return f.Data&(1<<(uint32(typ)&31)) != 0 |
| } |
