diff options
Diffstat (limited to 'vendor/github.com/google/gopacket/layers/vrrp.go')
| -rw-r--r-- | vendor/github.com/google/gopacket/layers/vrrp.go | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/vendor/github.com/google/gopacket/layers/vrrp.go b/vendor/github.com/google/gopacket/layers/vrrp.go deleted file mode 100644 index ffaafe6..0000000 --- a/vendor/github.com/google/gopacket/layers/vrrp.go +++ /dev/null @@ -1,156 +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" - "errors" - "net" - - "github.com/google/gopacket" -) - -/* - This layer provides decoding for Virtual Router Redundancy Protocol (VRRP) v2. - https://tools.ietf.org/html/rfc3768#section-5 - 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 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - |Version| Type | Virtual Rtr ID| Priority | Count IP Addrs| - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Auth Type | Adver Int | Checksum | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | IP Address (1) | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | . | - | . | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | IP Address (n) | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Authentication Data (1) | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Authentication Data (2) | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -*/ - -type VRRPv2Type uint8 -type VRRPv2AuthType uint8 - -const ( - VRRPv2Advertisement VRRPv2Type = 0x01 // router advertisement -) - -// String conversions for VRRP message types -func (v VRRPv2Type) String() string { - switch v { - case VRRPv2Advertisement: - return "VRRPv2 Advertisement" - default: - return "" - } -} - -const ( - VRRPv2AuthNoAuth VRRPv2AuthType = 0x00 // No Authentication - VRRPv2AuthReserved1 VRRPv2AuthType = 0x01 // Reserved field 1 - VRRPv2AuthReserved2 VRRPv2AuthType = 0x02 // Reserved field 2 -) - -func (v VRRPv2AuthType) String() string { - switch v { - case VRRPv2AuthNoAuth: - return "No Authentication" - case VRRPv2AuthReserved1: - return "Reserved" - case VRRPv2AuthReserved2: - return "Reserved" - default: - return "" - } -} - -// VRRPv2 represents an VRRP v2 message. -type VRRPv2 struct { - BaseLayer - Version uint8 // The version field specifies the VRRP protocol version of this packet (v2) - Type VRRPv2Type // The type field specifies the type of this VRRP packet. The only type defined in v2 is ADVERTISEMENT - VirtualRtrID uint8 // identifies the virtual router this packet is reporting status for - Priority uint8 // specifies the sending VRRP router's priority for the virtual router (100 = default) - CountIPAddr uint8 // The number of IP addresses contained in this VRRP advertisement. - AuthType VRRPv2AuthType // identifies the authentication method being utilized - AdverInt uint8 // The Advertisement interval indicates the time interval (in seconds) between ADVERTISEMENTS. The default is 1 second - Checksum uint16 // used to detect data corruption in the VRRP message. - IPAddress []net.IP // one or more IP addresses associated with the virtual router. Specified in the CountIPAddr field. -} - -// LayerType returns LayerTypeVRRP for VRRP v2 message. -func (v *VRRPv2) LayerType() gopacket.LayerType { return LayerTypeVRRP } - -func (v *VRRPv2) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { - - v.BaseLayer = BaseLayer{Contents: data[:len(data)]} - v.Version = data[0] >> 4 // high nibble == VRRP version. We're expecting v2 - - v.Type = VRRPv2Type(data[0] & 0x0F) // low nibble == VRRP type. Expecting 1 (advertisement) - if v.Type != 1 { - // rfc3768: A packet with unknown type MUST be discarded. - return errors.New("Unrecognized VRRPv2 type field.") - } - - v.VirtualRtrID = data[1] - v.Priority = data[2] - - v.CountIPAddr = data[3] - if v.CountIPAddr < 1 { - return errors.New("VRRPv2 number of IP addresses is not valid.") - } - - v.AuthType = VRRPv2AuthType(data[4]) - v.AdverInt = uint8(data[5]) - v.Checksum = binary.BigEndian.Uint16(data[6:8]) - - // populate the IPAddress field. The number of addresses is specified in the v.CountIPAddr field - // offset references the starting byte containing the list of ip addresses - offset := 8 - for i := uint8(0); i < v.CountIPAddr; i++ { - v.IPAddress = append(v.IPAddress, data[offset:offset+4]) - offset += 4 - } - - // any trailing packets here may be authentication data and *should* be ignored in v2 as per RFC - // - // 5.3.10. Authentication Data - // - // The authentication string is currently only used to maintain - // backwards compatibility with RFC 2338. It SHOULD be set to zero on - // transmission and ignored on reception. - return nil -} - -// CanDecode specifies the layer type in which we are attempting to unwrap. -func (v *VRRPv2) CanDecode() gopacket.LayerClass { - return LayerTypeVRRP -} - -// NextLayerType specifies the next layer that should be decoded. VRRP does not contain any further payload, so we set to 0 -func (v *VRRPv2) NextLayerType() gopacket.LayerType { - return gopacket.LayerTypeZero -} - -// The VRRP packet does not include payload data. Setting byte slice to nil -func (v *VRRPv2) Payload() []byte { - return nil -} - -// decodeVRRP will parse VRRP v2 -func decodeVRRP(data []byte, p gopacket.PacketBuilder) error { - if len(data) < 8 { - return errors.New("Not a valid VRRP packet. Packet length is too small.") - } - v := &VRRPv2{} - return decodingLayerDecoder(v, data, p) -} |