25 lines
538 B
Go
25 lines
538 B
Go
// 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
|
|
}
|