| // 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 | |
| } |