1// Copyright 2013 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 ipv6 6 7import "golang.org/x/net/internal/iana" 8 9// BUG(mikio): On Windows, methods related to ICMPFilter are not 10// implemented. 11 12// An ICMPType represents a type of ICMP message. 13type ICMPType int 14 15func (typ ICMPType) String() string { 16 s, ok := icmpTypes[typ] 17 if !ok { 18 return "<nil>" 19 } 20 return s 21} 22 23// Protocol returns the ICMPv6 protocol number. 24func (typ ICMPType) Protocol() int { 25 return iana.ProtocolIPv6ICMP 26} 27 28// An ICMPFilter represents an ICMP message filter for incoming 29// packets. The filter belongs to a packet delivery path on a host and 30// it cannot interact with forwarding packets or tunnel-outer packets. 31// 32// Note: RFC 8200 defines a reasonable role model. A node means a 33// device that implements IP. A router means a node that forwards IP 34// packets not explicitly addressed to itself, and a host means a node 35// that is not a router. 36type ICMPFilter struct { 37 icmpv6Filter 38} 39 40// Accept accepts incoming ICMP packets including the type field value 41// typ. 42func (f *ICMPFilter) Accept(typ ICMPType) { 43 f.accept(typ) 44} 45 46// Block blocks incoming ICMP packets including the type field value 47// typ. 48func (f *ICMPFilter) Block(typ ICMPType) { 49 f.block(typ) 50} 51 52// SetAll sets the filter action to the filter. 53func (f *ICMPFilter) SetAll(block bool) { 54 f.setAll(block) 55} 56 57// WillBlock reports whether the ICMP type will be blocked. 58func (f *ICMPFilter) WillBlock(typ ICMPType) bool { 59 return f.willBlock(typ) 60} 61