diff options
Diffstat (limited to 'vendor/github.com/google/gopacket/layers/cdp.go')
| -rw-r--r-- | vendor/github.com/google/gopacket/layers/cdp.go | 651 |
1 files changed, 0 insertions, 651 deletions
diff --git a/vendor/github.com/google/gopacket/layers/cdp.go b/vendor/github.com/google/gopacket/layers/cdp.go deleted file mode 100644 index d67203e..0000000 --- a/vendor/github.com/google/gopacket/layers/cdp.go +++ /dev/null @@ -1,651 +0,0 @@ -// Copyright 2012 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. - -// Enum types courtesy of... -// http://search.cpan.org/~mchapman/Net-CDP-0.09/lib/Net/CDP.pm -// https://code.google.com/p/ladvd/ -// http://anonsvn.wireshark.org/viewvc/releases/wireshark-1.8.6/epan/dissectors/packet-cdp.c - -package layers - -import ( - "encoding/binary" - "fmt" - "net" - - "github.com/google/gopacket" -) - -// CDPTLVType is the type of each TLV value in a CiscoDiscovery packet. -type CDPTLVType uint16 - -// CDPTLVType values. -const ( - CDPTLVDevID CDPTLVType = 0x0001 - CDPTLVAddress CDPTLVType = 0x0002 - CDPTLVPortID CDPTLVType = 0x0003 - CDPTLVCapabilities CDPTLVType = 0x0004 - CDPTLVVersion CDPTLVType = 0x0005 - CDPTLVPlatform CDPTLVType = 0x0006 - CDPTLVIPPrefix CDPTLVType = 0x0007 - CDPTLVHello CDPTLVType = 0x0008 - CDPTLVVTPDomain CDPTLVType = 0x0009 - CDPTLVNativeVLAN CDPTLVType = 0x000a - CDPTLVFullDuplex CDPTLVType = 0x000b - CDPTLVVLANReply CDPTLVType = 0x000e - CDPTLVVLANQuery CDPTLVType = 0x000f - CDPTLVPower CDPTLVType = 0x0010 - CDPTLVMTU CDPTLVType = 0x0011 - CDPTLVExtendedTrust CDPTLVType = 0x0012 - CDPTLVUntrustedCOS CDPTLVType = 0x0013 - CDPTLVSysName CDPTLVType = 0x0014 - CDPTLVSysOID CDPTLVType = 0x0015 - CDPTLVMgmtAddresses CDPTLVType = 0x0016 - CDPTLVLocation CDPTLVType = 0x0017 - CDPTLVExternalPortID CDPTLVType = 0x0018 - CDPTLVPowerRequested CDPTLVType = 0x0019 - CDPTLVPowerAvailable CDPTLVType = 0x001a - CDPTLVPortUnidirectional CDPTLVType = 0x001b - CDPTLVEnergyWise CDPTLVType = 0x001d - CDPTLVSparePairPOE CDPTLVType = 0x001f -) - -// CiscoDiscoveryValue is a TLV value inside a CiscoDiscovery packet layer. -type CiscoDiscoveryValue struct { - Type CDPTLVType - Length uint16 - Value []byte -} - -// CiscoDiscovery is a packet layer containing the Cisco Discovery Protocol. -// See http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/frames.htm#31885 -type CiscoDiscovery struct { - BaseLayer - Version byte - TTL byte - Checksum uint16 - Values []CiscoDiscoveryValue -} - -// CDPCapability is the set of capabilities advertised by a CDP device. -type CDPCapability uint32 - -// CDPCapability values. -const ( - CDPCapMaskRouter CDPCapability = 0x0001 - CDPCapMaskTBBridge CDPCapability = 0x0002 - CDPCapMaskSPBridge CDPCapability = 0x0004 - CDPCapMaskSwitch CDPCapability = 0x0008 - CDPCapMaskHost CDPCapability = 0x0010 - CDPCapMaskIGMPFilter CDPCapability = 0x0020 - CDPCapMaskRepeater CDPCapability = 0x0040 - CDPCapMaskPhone CDPCapability = 0x0080 - CDPCapMaskRemote CDPCapability = 0x0100 -) - -// CDPCapabilities represents the capabilities of a device -type CDPCapabilities struct { - L3Router bool - TBBridge bool - SPBridge bool - L2Switch bool - IsHost bool - IGMPFilter bool - L1Repeater bool - IsPhone bool - RemotelyManaged bool -} - -// CDP Power-over-Ethernet values. -const ( - CDPPoEFourWire byte = 0x01 - CDPPoEPDArch byte = 0x02 - CDPPoEPDRequest byte = 0x04 - CDPPoEPSE byte = 0x08 -) - -// CDPSparePairPoE provides information on PoE. -type CDPSparePairPoE struct { - PSEFourWire bool // Supported / Not supported - PDArchShared bool // Shared / Independent - PDRequestOn bool // On / Off - PSEOn bool // On / Off -} - -// CDPVLANDialogue encapsulates a VLAN Query/Reply -type CDPVLANDialogue struct { - ID uint8 - VLAN uint16 -} - -// CDPPowerDialogue encapsulates a Power Query/Reply -type CDPPowerDialogue struct { - ID uint16 - MgmtID uint16 - Values []uint32 -} - -// CDPLocation provides location information for a CDP device. -type CDPLocation struct { - Type uint8 // Undocumented - Location string -} - -// CDPHello is a Cisco Hello message (undocumented, hence the "Unknown" fields) -type CDPHello struct { - OUI []byte - ProtocolID uint16 - ClusterMaster net.IP - Unknown1 net.IP - Version byte - SubVersion byte - Status byte - Unknown2 byte - ClusterCommander net.HardwareAddr - SwitchMAC net.HardwareAddr - Unknown3 byte - ManagementVLAN uint16 -} - -// CDPEnergyWiseSubtype is used within CDP to define TLV values. -type CDPEnergyWiseSubtype uint32 - -// CDPEnergyWiseSubtype values. -const ( - CDPEnergyWiseRole CDPEnergyWiseSubtype = 0x00000007 - CDPEnergyWiseDomain CDPEnergyWiseSubtype = 0x00000008 - CDPEnergyWiseName CDPEnergyWiseSubtype = 0x00000009 - CDPEnergyWiseReplyTo CDPEnergyWiseSubtype = 0x00000017 -) - -// CDPEnergyWise is used by CDP to monitor and control power usage. -type CDPEnergyWise struct { - EncryptedData []byte - Unknown1 uint32 - SequenceNumber uint32 - ModelNumber string - Unknown2 uint16 - HardwareID string - SerialNum string - Unknown3 []byte - Role string - Domain string - Name string - ReplyUnknown1 []byte - ReplyPort []byte - ReplyAddress []byte - ReplyUnknown2 []byte - ReplyUnknown3 []byte -} - -// CiscoDiscoveryInfo represents the decoded details for a set of CiscoDiscoveryValues -type CiscoDiscoveryInfo struct { - BaseLayer - CDPHello - DeviceID string - Addresses []net.IP - PortID string - Capabilities CDPCapabilities - Version string - Platform string - IPPrefixes []net.IPNet - VTPDomain string - NativeVLAN uint16 - FullDuplex bool - VLANReply CDPVLANDialogue - VLANQuery CDPVLANDialogue - PowerConsumption uint16 - MTU uint32 - ExtendedTrust uint8 - UntrustedCOS uint8 - SysName string - SysOID string - MgmtAddresses []net.IP - Location CDPLocation - PowerRequest CDPPowerDialogue - PowerAvailable CDPPowerDialogue - SparePairPoe CDPSparePairPoE - EnergyWise CDPEnergyWise - Unknown []CiscoDiscoveryValue -} - -// LayerType returns gopacket.LayerTypeCiscoDiscovery. -func (c *CiscoDiscovery) LayerType() gopacket.LayerType { - return LayerTypeCiscoDiscovery -} - -func decodeCiscoDiscovery(data []byte, p gopacket.PacketBuilder) error { - c := &CiscoDiscovery{ - Version: data[0], - TTL: data[1], - Checksum: binary.BigEndian.Uint16(data[2:4]), - } - if c.Version != 1 && c.Version != 2 { - return fmt.Errorf("Invalid CiscoDiscovery version number %d", c.Version) - } - var err error - c.Values, err = decodeCiscoDiscoveryTLVs(data[4:]) - if err != nil { - return err - } - c.Contents = data[0:4] - c.Payload = data[4:] - p.AddLayer(c) - return p.NextDecoder(gopacket.DecodeFunc(decodeCiscoDiscoveryInfo)) -} - -// LayerType returns gopacket.LayerTypeCiscoDiscoveryInfo. -func (c *CiscoDiscoveryInfo) LayerType() gopacket.LayerType { - return LayerTypeCiscoDiscoveryInfo -} - -func decodeCiscoDiscoveryTLVs(data []byte) (values []CiscoDiscoveryValue, err error) { - for len(data) > 0 { - val := CiscoDiscoveryValue{ - Type: CDPTLVType(binary.BigEndian.Uint16(data[:2])), - Length: binary.BigEndian.Uint16(data[2:4]), - } - if val.Length < 4 { - err = fmt.Errorf("Invalid CiscoDiscovery value length %d", val.Length) - break - } - val.Value = data[4:val.Length] - values = append(values, val) - data = data[val.Length:] - } - return -} - -func decodeCiscoDiscoveryInfo(data []byte, p gopacket.PacketBuilder) error { - var err error - info := &CiscoDiscoveryInfo{BaseLayer: BaseLayer{Contents: data}} - p.AddLayer(info) - values, err := decodeCiscoDiscoveryTLVs(data) - if err != nil { // Unlikely, as parent decode will fail, but better safe... - return err - } - for _, val := range values { - switch val.Type { - case CDPTLVDevID: - info.DeviceID = string(val.Value) - case CDPTLVAddress: - if err = checkCDPTLVLen(val, 4); err != nil { - return err - } - info.Addresses, err = decodeAddresses(val.Value) - if err != nil { - return err - } - case CDPTLVPortID: - info.PortID = string(val.Value) - case CDPTLVCapabilities: - if err = checkCDPTLVLen(val, 4); err != nil { - return err - } - val := CDPCapability(binary.BigEndian.Uint32(val.Value[0:4])) - info.Capabilities.L3Router = (val&CDPCapMaskRouter > 0) - info.Capabilities.TBBridge = (val&CDPCapMaskTBBridge > 0) - info.Capabilities.SPBridge = (val&CDPCapMaskSPBridge > 0) - info.Capabilities.L2Switch = (val&CDPCapMaskSwitch > 0) - info.Capabilities.IsHost = (val&CDPCapMaskHost > 0) - info.Capabilities.IGMPFilter = (val&CDPCapMaskIGMPFilter > 0) - info.Capabilities.L1Repeater = (val&CDPCapMaskRepeater > 0) - info.Capabilities.IsPhone = (val&CDPCapMaskPhone > 0) - info.Capabilities.RemotelyManaged = (val&CDPCapMaskRemote > 0) - case CDPTLVVersion: - info.Version = string(val.Value) - case CDPTLVPlatform: - info.Platform = string(val.Value) - case CDPTLVIPPrefix: - v := val.Value - l := len(v) - if l%5 == 0 && l >= 5 { - for len(v) > 0 { - _, ipnet, _ := net.ParseCIDR(fmt.Sprintf("%d.%d.%d.%d/%d", v[0], v[1], v[2], v[3], v[4])) - info.IPPrefixes = append(info.IPPrefixes, *ipnet) - v = v[5:] - } - } else { - return fmt.Errorf("Invalid TLV %v length %d", val.Type, len(val.Value)) - } - case CDPTLVHello: - if err = checkCDPTLVLen(val, 32); err != nil { - return err - } - v := val.Value - info.CDPHello.OUI = v[0:3] - info.CDPHello.ProtocolID = binary.BigEndian.Uint16(v[3:5]) - info.CDPHello.ClusterMaster = v[5:9] - info.CDPHello.Unknown1 = v[9:13] - info.CDPHello.Version = v[13] - info.CDPHello.SubVersion = v[14] - info.CDPHello.Status = v[15] - info.CDPHello.Unknown2 = v[16] - info.CDPHello.ClusterCommander = v[17:23] - info.CDPHello.SwitchMAC = v[23:29] - info.CDPHello.Unknown3 = v[29] - info.CDPHello.ManagementVLAN = binary.BigEndian.Uint16(v[30:32]) - case CDPTLVVTPDomain: - info.VTPDomain = string(val.Value) - case CDPTLVNativeVLAN: - if err = checkCDPTLVLen(val, 2); err != nil { - return err - } - info.NativeVLAN = binary.BigEndian.Uint16(val.Value[0:2]) - case CDPTLVFullDuplex: - if err = checkCDPTLVLen(val, 1); err != nil { - return err - } - info.FullDuplex = (val.Value[0] == 1) - case CDPTLVVLANReply: - if err = checkCDPTLVLen(val, 3); err != nil { - return err - } - info.VLANReply.ID = uint8(val.Value[0]) - info.VLANReply.VLAN = binary.BigEndian.Uint16(val.Value[1:3]) - case CDPTLVVLANQuery: - if err = checkCDPTLVLen(val, 3); err != nil { - return err - } - info.VLANQuery.ID = uint8(val.Value[0]) - info.VLANQuery.VLAN = binary.BigEndian.Uint16(val.Value[1:3]) - case CDPTLVPower: - if err = checkCDPTLVLen(val, 2); err != nil { - return err - } - info.PowerConsumption = binary.BigEndian.Uint16(val.Value[0:2]) - case CDPTLVMTU: - if err = checkCDPTLVLen(val, 4); err != nil { - return err - } - info.MTU = binary.BigEndian.Uint32(val.Value[0:4]) - case CDPTLVExtendedTrust: - if err = checkCDPTLVLen(val, 1); err != nil { - return err - } - info.ExtendedTrust = uint8(val.Value[0]) - case CDPTLVUntrustedCOS: - if err = checkCDPTLVLen(val, 1); err != nil { - return err - } - info.UntrustedCOS = uint8(val.Value[0]) - case CDPTLVSysName: - info.SysName = string(val.Value) - case CDPTLVSysOID: - info.SysOID = string(val.Value) - case CDPTLVMgmtAddresses: - if err = checkCDPTLVLen(val, 4); err != nil { - return err - } - info.MgmtAddresses, err = decodeAddresses(val.Value) - if err != nil { - return err - } - case CDPTLVLocation: - if err = checkCDPTLVLen(val, 2); err != nil { - return err - } - info.Location.Type = uint8(val.Value[0]) - info.Location.Location = string(val.Value[1:]) - - // case CDPTLVLExternalPortID: - // Undocumented - case CDPTLVPowerRequested: - if err = checkCDPTLVLen(val, 4); err != nil { - return err - } - info.PowerRequest.ID = binary.BigEndian.Uint16(val.Value[0:2]) - info.PowerRequest.MgmtID = binary.BigEndian.Uint16(val.Value[2:4]) - for n := 4; n < len(val.Value); n += 4 { - info.PowerRequest.Values = append(info.PowerRequest.Values, binary.BigEndian.Uint32(val.Value[n:n+4])) - } - case CDPTLVPowerAvailable: - if err = checkCDPTLVLen(val, 4); err != nil { - return err - } - info.PowerAvailable.ID = binary.BigEndian.Uint16(val.Value[0:2]) - info.PowerAvailable.MgmtID = binary.BigEndian.Uint16(val.Value[2:4]) - for n := 4; n < len(val.Value); n += 4 { - info.PowerAvailable.Values = append(info.PowerAvailable.Values, binary.BigEndian.Uint32(val.Value[n:n+4])) - } - // case CDPTLVPortUnidirectional - // Undocumented - case CDPTLVEnergyWise: - if err = checkCDPTLVLen(val, 72); err != nil { - return err - } - info.EnergyWise.EncryptedData = val.Value[0:20] - info.EnergyWise.Unknown1 = binary.BigEndian.Uint32(val.Value[20:24]) - info.EnergyWise.SequenceNumber = binary.BigEndian.Uint32(val.Value[24:28]) - info.EnergyWise.ModelNumber = string(val.Value[28:44]) - info.EnergyWise.Unknown2 = binary.BigEndian.Uint16(val.Value[44:46]) - info.EnergyWise.HardwareID = string(val.Value[46:49]) - info.EnergyWise.SerialNum = string(val.Value[49:60]) - info.EnergyWise.Unknown3 = val.Value[60:68] - tlvLen := binary.BigEndian.Uint16(val.Value[68:70]) - tlvNum := binary.BigEndian.Uint16(val.Value[70:72]) - data := val.Value[72:] - if len(data) < int(tlvLen) { - return fmt.Errorf("Invalid TLV length %d vs %d", tlvLen, len(data)) - } - numSeen := 0 - for len(data) > 8 { - numSeen++ - if numSeen > int(tlvNum) { // Too many TLV's ? - return fmt.Errorf("Too many TLV's - wanted %d, saw %d", tlvNum, numSeen) - } - tType := CDPEnergyWiseSubtype(binary.BigEndian.Uint32(data[0:4])) - tLen := int(binary.BigEndian.Uint32(data[4:8])) - if tLen > len(data)-8 { - return fmt.Errorf("Invalid TLV length %d vs %d", tLen, len(data)-8) - } - data = data[8:] - switch tType { - case CDPEnergyWiseRole: - info.EnergyWise.Role = string(data[:]) - case CDPEnergyWiseDomain: - info.EnergyWise.Domain = string(data[:]) - case CDPEnergyWiseName: - info.EnergyWise.Name = string(data[:]) - case CDPEnergyWiseReplyTo: - if len(data) >= 18 { - info.EnergyWise.ReplyUnknown1 = data[0:2] - info.EnergyWise.ReplyPort = data[2:4] - info.EnergyWise.ReplyAddress = data[4:8] - info.EnergyWise.ReplyUnknown2 = data[8:10] - info.EnergyWise.ReplyUnknown3 = data[10:14] - } - } - data = data[tLen:] - } - case CDPTLVSparePairPOE: - if err = checkCDPTLVLen(val, 1); err != nil { - return err - } - v := val.Value[0] - info.SparePairPoe.PSEFourWire = (v&CDPPoEFourWire > 0) - info.SparePairPoe.PDArchShared = (v&CDPPoEPDArch > 0) - info.SparePairPoe.PDRequestOn = (v&CDPPoEPDRequest > 0) - info.SparePairPoe.PSEOn = (v&CDPPoEPSE > 0) - default: - info.Unknown = append(info.Unknown, val) - } - } - return nil -} - -// CDP Protocol Types -const ( - CDPProtocolTypeNLPID byte = 1 - CDPProtocolType802_2 byte = 2 -) - -// CDPAddressType is used to define TLV values within CDP addresses. -type CDPAddressType uint64 - -// CDP Address types. -const ( - CDPAddressTypeCLNP CDPAddressType = 0x81 - CDPAddressTypeIPV4 CDPAddressType = 0xcc - CDPAddressTypeIPV6 CDPAddressType = 0xaaaa030000000800 - CDPAddressTypeDECNET CDPAddressType = 0xaaaa030000006003 - CDPAddressTypeAPPLETALK CDPAddressType = 0xaaaa03000000809b - CDPAddressTypeIPX CDPAddressType = 0xaaaa030000008137 - CDPAddressTypeVINES CDPAddressType = 0xaaaa0300000080c4 - CDPAddressTypeXNS CDPAddressType = 0xaaaa030000000600 - CDPAddressTypeAPOLLO CDPAddressType = 0xaaaa030000008019 -) - -func decodeAddresses(v []byte) (addresses []net.IP, err error) { - numaddr := int(binary.BigEndian.Uint32(v[0:4])) - if numaddr < 1 { - return nil, fmt.Errorf("Invalid Address TLV number %d", numaddr) - } - v = v[4:] - if len(v) < numaddr*8 { - return nil, fmt.Errorf("Invalid Address TLV length %d", len(v)) - } - for i := 0; i < numaddr; i++ { - prottype := v[0] - if prottype != CDPProtocolTypeNLPID && prottype != CDPProtocolType802_2 { // invalid protocol type - return nil, fmt.Errorf("Invalid Address Protocol %d", prottype) - } - protlen := int(v[1]) - if (prottype == CDPProtocolTypeNLPID && protlen != 1) || - (prottype == CDPProtocolType802_2 && protlen != 3 && protlen != 8) { // invalid length - return nil, fmt.Errorf("Invalid Address Protocol length %d", protlen) - } - plen := make([]byte, 8) - copy(plen[8-protlen:], v[2:2+protlen]) - protocol := CDPAddressType(binary.BigEndian.Uint64(plen)) - v = v[2+protlen:] - addrlen := binary.BigEndian.Uint16(v[0:2]) - ab := v[2 : 2+addrlen] - if protocol == CDPAddressTypeIPV4 && addrlen == 4 { - addresses = append(addresses, net.IPv4(ab[0], ab[1], ab[2], ab[3])) - } else if protocol == CDPAddressTypeIPV6 && addrlen == 16 { - addresses = append(addresses, net.IP(ab)) - } else { - // only handle IPV4 & IPV6 for now - } - v = v[2+addrlen:] - if len(v) < 8 { - break - } - } - return -} - -func (t CDPTLVType) String() (s string) { - switch t { - case CDPTLVDevID: - s = "Device ID" - case CDPTLVAddress: - s = "Addresses" - case CDPTLVPortID: - s = "Port ID" - case CDPTLVCapabilities: - s = "Capabilities" - case CDPTLVVersion: - s = "Software Version" - case CDPTLVPlatform: - s = "Platform" - case CDPTLVIPPrefix: - s = "IP Prefix" - case CDPTLVHello: - s = "Protocol Hello" - case CDPTLVVTPDomain: - s = "VTP Management Domain" - case CDPTLVNativeVLAN: - s = "Native VLAN" - case CDPTLVFullDuplex: - s = "Full Duplex" - case CDPTLVVLANReply: - s = "VoIP VLAN Reply" - case CDPTLVVLANQuery: - s = "VLANQuery" - case CDPTLVPower: - s = "Power consumption" - case CDPTLVMTU: - s = "MTU" - case CDPTLVExtendedTrust: - s = "Extended Trust Bitmap" - case CDPTLVUntrustedCOS: - s = "Untrusted Port CoS" - case CDPTLVSysName: - s = "System Name" - case CDPTLVSysOID: - s = "System OID" - case CDPTLVMgmtAddresses: - s = "Management Addresses" - case CDPTLVLocation: - s = "Location" - case CDPTLVExternalPortID: - s = "External Port ID" - case CDPTLVPowerRequested: - s = "Power Requested" - case CDPTLVPowerAvailable: - s = "Power Available" - case CDPTLVPortUnidirectional: - s = "Port Unidirectional" - case CDPTLVEnergyWise: - s = "Energy Wise" - case CDPTLVSparePairPOE: - s = "Spare Pair POE" - default: - s = "Unknown" - } - return -} - -func (a CDPAddressType) String() (s string) { - switch a { - case CDPAddressTypeCLNP: - s = "Connectionless Network Protocol" - case CDPAddressTypeIPV4: - s = "IPv4" - case CDPAddressTypeIPV6: - s = "IPv6" - case CDPAddressTypeDECNET: - s = "DECnet Phase IV" - case CDPAddressTypeAPPLETALK: - s = "Apple Talk" - case CDPAddressTypeIPX: - s = "Novell IPX" - case CDPAddressTypeVINES: - s = "Banyan VINES" - case CDPAddressTypeXNS: - s = "Xerox Network Systems" - case CDPAddressTypeAPOLLO: - s = "Apollo" - default: - s = "Unknown" - } - return -} - -func (t CDPEnergyWiseSubtype) String() (s string) { - switch t { - case CDPEnergyWiseRole: - s = "Role" - case CDPEnergyWiseDomain: - s = "Domain" - case CDPEnergyWiseName: - s = "Name" - case CDPEnergyWiseReplyTo: - s = "ReplyTo" - default: - s = "Unknown" - } - return -} - -func checkCDPTLVLen(v CiscoDiscoveryValue, l int) (err error) { - if len(v.Value) < l { - err = fmt.Errorf("Invalid TLV %v length %d", v.Type, len(v.Value)) - } - return -} |