diff options
Diffstat (limited to 'vendor/github.com/google/gopacket/layers/arp.go')
-rw-r--r-- | vendor/github.com/google/gopacket/layers/arp.go | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/vendor/github.com/google/gopacket/layers/arp.go b/vendor/github.com/google/gopacket/layers/arp.go deleted file mode 100644 index 49e05ac..0000000 --- a/vendor/github.com/google/gopacket/layers/arp.go +++ /dev/null @@ -1,109 +0,0 @@ -// Copyright 2012 Google, Inc. All rights reserved. -// Copyright 2009-2011 Andreas Krennmair. All rights reserved. -// -// Use of this source code is governed by a BSD-style license -// that can be found in the LICENSE file in the root of the source -// tree. - -package layers - -import ( - "encoding/binary" - "errors" - - "github.com/google/gopacket" -) - -// Potential values for ARP.Operation. -const ( - ARPRequest = 1 - ARPReply = 2 -) - -// ARP is a ARP packet header. -type ARP struct { - BaseLayer - AddrType LinkType - Protocol EthernetType - HwAddressSize uint8 - ProtAddressSize uint8 - Operation uint16 - SourceHwAddress []byte - SourceProtAddress []byte - DstHwAddress []byte - DstProtAddress []byte -} - -// LayerType returns LayerTypeARP -func (arp *ARP) LayerType() gopacket.LayerType { return LayerTypeARP } - -// DecodeFromBytes decodes the given bytes into this layer. -func (arp *ARP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { - arp.AddrType = LinkType(binary.BigEndian.Uint16(data[0:2])) - arp.Protocol = EthernetType(binary.BigEndian.Uint16(data[2:4])) - arp.HwAddressSize = data[4] - arp.ProtAddressSize = data[5] - arp.Operation = binary.BigEndian.Uint16(data[6:8]) - arp.SourceHwAddress = data[8 : 8+arp.HwAddressSize] - arp.SourceProtAddress = data[8+arp.HwAddressSize : 8+arp.HwAddressSize+arp.ProtAddressSize] - arp.DstHwAddress = data[8+arp.HwAddressSize+arp.ProtAddressSize : 8+2*arp.HwAddressSize+arp.ProtAddressSize] - arp.DstProtAddress = data[8+2*arp.HwAddressSize+arp.ProtAddressSize : 8+2*arp.HwAddressSize+2*arp.ProtAddressSize] - - arpLength := 8 + 2*arp.HwAddressSize + 2*arp.ProtAddressSize - arp.Contents = data[:arpLength] - arp.Payload = data[arpLength:] - return nil -} - -// SerializeTo writes the serialized form of this layer into the -// SerializationBuffer, implementing gopacket.SerializableLayer. -// See the docs for gopacket.SerializableLayer for more info. -func (arp *ARP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { - size := 8 + len(arp.SourceHwAddress) + len(arp.SourceProtAddress) + len(arp.DstHwAddress) + len(arp.DstProtAddress) - bytes, err := b.PrependBytes(size) - if err != nil { - return err - } - if opts.FixLengths { - if len(arp.SourceHwAddress) != len(arp.DstHwAddress) { - return errors.New("mismatched hardware address sizes") - } - arp.HwAddressSize = uint8(len(arp.SourceHwAddress)) - if len(arp.SourceProtAddress) != len(arp.DstProtAddress) { - return errors.New("mismatched prot address sizes") - } - arp.ProtAddressSize = uint8(len(arp.SourceProtAddress)) - } - binary.BigEndian.PutUint16(bytes, uint16(arp.AddrType)) - binary.BigEndian.PutUint16(bytes[2:], uint16(arp.Protocol)) - bytes[4] = arp.HwAddressSize - bytes[5] = arp.ProtAddressSize - binary.BigEndian.PutUint16(bytes[6:], arp.Operation) - start := 8 - for _, addr := range [][]byte{ - arp.SourceHwAddress, - arp.SourceProtAddress, - arp.DstHwAddress, - arp.DstProtAddress, - } { - copy(bytes[start:], addr) - start += len(addr) - } - return nil -} - -// CanDecode returns the set of layer types that this DecodingLayer can decode. -func (arp *ARP) CanDecode() gopacket.LayerClass { - return LayerTypeARP -} - -// NextLayerType returns the layer type contained by this DecodingLayer. -func (arp *ARP) NextLayerType() gopacket.LayerType { - return gopacket.LayerTypePayload -} - -func decodeARP(data []byte, p gopacket.PacketBuilder) error { - - arp := &ARP{} - return decodingLayerDecoder(arp, data, p) -} |