| // Copyright 2013 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 ipv6 |
| |
| import "sync" |
| |
| // An ICMPType represents a type of ICMP message. |
| type ICMPType int |
| |
| func (typ ICMPType) String() string { |
| s, ok := icmpTypes[typ] |
| if !ok { |
| return "<nil>" |
| } |
| return s |
| } |
| |
| // An ICMPFilter represents an ICMP message filter for incoming |
| // packets. |
| type ICMPFilter struct { |
| mu sync.RWMutex |
| sysICMPFilter |
| } |
| |
| // Set sets the ICMP type and filter action to the filter. |
| func (f *ICMPFilter) Set(typ ICMPType, block bool) { |
| f.mu.Lock() |
| f.set(typ, block) |
| f.mu.Unlock() |
| } |
| |
| // SetAll sets the filter action to the filter. |
| func (f *ICMPFilter) SetAll(block bool) { |
| f.mu.Lock() |
| f.setAll(block) |
| f.mu.Unlock() |
| } |
| |
| // WillBlock reports whether the ICMP type will be blocked. |
| func (f *ICMPFilter) WillBlock(typ ICMPType) bool { |
| f.mu.RLock() |
| ok := f.willBlock(typ) |
| f.mu.RUnlock() |
| return ok |
| } |