42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package icmp
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// A MessageBody represents an ICMP message body.
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type MessageBody interface {
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// Len returns the length of ICMP message body.
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// Proto must be either the ICMPv4 or ICMPv6 protocol number.
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Len(proto int) int
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// Marshal returns the binary encoding of ICMP message body.
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// Proto must be either the ICMPv4 or ICMPv6 protocol number.
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Marshal(proto int) ([]byte, error)
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}
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// A DefaultMessageBody represents the default message body.
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type DefaultMessageBody struct {
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Data []byte // data
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}
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// Len implements the Len method of MessageBody interface.
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func (p *DefaultMessageBody) Len(proto int) int {
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if p == nil {
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return 0
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}
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return len(p.Data)
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}
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// Marshal implements the Marshal method of MessageBody interface.
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func (p *DefaultMessageBody) Marshal(proto int) ([]byte, error) {
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return p.Data, nil
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}
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// parseDefaultMessageBody parses b as an ICMP message body.
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func parseDefaultMessageBody(proto int, b []byte) (MessageBody, error) {
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p := &DefaultMessageBody{Data: make([]byte, len(b))}
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copy(p.Data, b)
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return p, nil
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}
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