diff options
Diffstat (limited to 'vendor/github.com/google/gopacket/layers/vxlan.go')
| -rw-r--r-- | vendor/github.com/google/gopacket/layers/vxlan.go | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/vendor/github.com/google/gopacket/layers/vxlan.go b/vendor/github.com/google/gopacket/layers/vxlan.go deleted file mode 100644 index 08f1ecb..0000000 --- a/vendor/github.com/google/gopacket/layers/vxlan.go +++ /dev/null @@ -1,94 +0,0 @@ -// Copyright 2016 Google, Inc. 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" - "fmt" - "github.com/google/gopacket" -) - -// VXLAN is specifed in RFC 7348 https://tools.ietf.org/html/rfc7348 -// G, D, A, Group Policy ID from https://tools.ietf.org/html/draft-smith-vxlan-group-policy-00 -// 0 1 2 3 -// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 -// 0 8 16 24 32 -// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -// |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | -// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -// | 24 bit VXLAN Network Identifier | Reserved | -// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - -// VXLAN is a VXLAN packet header -type VXLAN struct { - BaseLayer - ValidIDFlag bool // 'I' bit per RFC 7348 - VNI uint32 // 'VXLAN Network Identifier' 24 bits per RFC 7348 - GBPExtension bool // 'G' bit per Group Policy https://tools.ietf.org/html/draft-smith-vxlan-group-policy-00 - GBPDontLearn bool // 'D' bit per Group Policy - GBPApplied bool // 'A' bit per Group Policy - GBPGroupPolicyID uint16 // 'Group Policy ID' 16 bits per Group Policy -} - -// LayerType returns LayerTypeVXLAN -func (vx *VXLAN) LayerType() gopacket.LayerType { return LayerTypeVXLAN } - -func decodeVXLAN(data []byte, p gopacket.PacketBuilder) error { - vx := &VXLAN{} - - // VNI is a 24bit number, Uint32 requires 32 bits - var buf [4]byte - copy(buf[1:], data[4:7]) - - // RFC 7348 https://tools.ietf.org/html/rfc7348 - vx.ValidIDFlag = data[0]&0x08 > 0 // 'I' bit per RFC7348 - vx.VNI = binary.BigEndian.Uint32(buf[:]) // VXLAN Network Identifier per RFC7348 - - // Group Based Policy https://tools.ietf.org/html/draft-smith-vxlan-group-policy-00 - vx.GBPExtension = data[0]&0x80 > 0 // 'G' bit per the group policy draft - vx.GBPDontLearn = data[1]&0x40 > 0 // 'D' bit - the egress VTEP MUST NOT learn the source address of the encapsulated frame. - vx.GBPApplied = data[1]&0x80 > 0 // 'A' bit - indicates that the group policy has already been applied to this packet. - vx.GBPGroupPolicyID = binary.BigEndian.Uint16(data[2:4]) // Policy ID as per the group policy draft - - // Layer information - const vxlanLength = 8 - vx.Contents = data[:vxlanLength] - vx.Payload = data[vxlanLength:] - - p.AddLayer(vx) - return p.NextDecoder(LinkTypeEthernet) -} - -// SerializeTo writes the serialized form of this layer into the -// SerializationBuffer, implementing gopacket.SerializableLayer. -// See the docs for gopacket.SerializableLayer for more info. -func (vx *VXLAN) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { - bytes, err := b.PrependBytes(8) - if err != nil { - return err - } - - if vx.ValidIDFlag { - bytes[0] |= 0x08 - } - if vx.GBPExtension { - bytes[0] |= 0x80 - } - if vx.GBPDontLearn { - bytes[1] |= 0x40 - } - if vx.GBPApplied { - bytes[1] |= 0x80 - } - - binary.BigEndian.PutUint16(bytes[2:4], vx.GBPGroupPolicyID) - if vx.VNI >= 1<<24 { - return fmt.Errorf("Virtual Network Identifier = %x exceeds max for 24-bit uint", vx.VNI) - } - binary.BigEndian.PutUint32(bytes[4:8], vx.VNI<<8) - return nil -} |