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
5package ipv4
6
7func (f *icmpFilter) accept(typ ICMPType) {
8	f.Data &^= 1 << (uint32(typ) & 31)
9}
10
11func (f *icmpFilter) block(typ ICMPType) {
12	f.Data |= 1 << (uint32(typ) & 31)
13}
14
15func (f *icmpFilter) setAll(block bool) {
16	if block {
17		f.Data = 1<<32 - 1
18	} else {
19		f.Data = 0
20	}
21}
22
23func (f *icmpFilter) willBlock(typ ICMPType) bool {
24	return f.Data&(1<<(uint32(typ)&31)) != 0
25}
26