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package dhcpv4
// values from http://www.networksorcery.com/enp/protocol/dhcp.htm and
// http://www.networksorcery.com/enp/protocol/bootp/options.htm
// TransactionID represents a 4-byte DHCP transaction ID as defined in RFC 951,
// Section 3.
//
// The TransactionID is used to match DHCP replies to their original request.
type TransactionID [4]byte
// MessageType represents the possible DHCP message types - DISCOVER, OFFER, etc
type MessageType byte
// DHCP message types
const (
// MessageTypeNone is not a real message type, it is used by certain
// functions to signal that no explicit message type is requested
MessageTypeNone MessageType = 0
MessageTypeDiscover MessageType = 1
MessageTypeOffer MessageType = 2
MessageTypeRequest MessageType = 3
MessageTypeDecline MessageType = 4
MessageTypeAck MessageType = 5
MessageTypeNak MessageType = 6
MessageTypeRelease MessageType = 7
MessageTypeInform MessageType = 8
)
func (m MessageType) String() string {
if s, ok := messageTypeToString[m]; ok {
return s
}
return "Unknown"
}
var messageTypeToString = map[MessageType]string{
MessageTypeDiscover: "DISCOVER",
MessageTypeOffer: "OFFER",
MessageTypeRequest: "REQUEST",
MessageTypeDecline: "DECLINE",
MessageTypeAck: "ACK",
MessageTypeNak: "NAK",
MessageTypeRelease: "RELEASE",
MessageTypeInform: "INFORM",
}
// OpcodeType represents a DHCPv4 opcode.
type OpcodeType uint8
// constants that represent valid values for OpcodeType
const (
OpcodeBootRequest OpcodeType = 1
OpcodeBootReply OpcodeType = 2
)
func (o OpcodeType) String() string {
if s, ok := opcodeToString[o]; ok {
return s
}
return "Unknown"
}
var opcodeToString = map[OpcodeType]string{
OpcodeBootRequest: "BootRequest",
OpcodeBootReply: "BootReply",
}
// DHCPv4 Options
const (
OptionPad OptionCode = 0
OptionSubnetMask OptionCode = 1
OptionTimeOffset OptionCode = 2
OptionRouter OptionCode = 3
OptionTimeServer OptionCode = 4
OptionNameServer OptionCode = 5
OptionDomainNameServer OptionCode = 6
OptionLogServer OptionCode = 7
OptionQuoteServer OptionCode = 8
OptionLPRServer OptionCode = 9
OptionImpressServer OptionCode = 10
OptionResourceLocationServer OptionCode = 11
OptionHostName OptionCode = 12
OptionBootFileSize OptionCode = 13
OptionMeritDumpFile OptionCode = 14
OptionDomainName OptionCode = 15
OptionSwapServer OptionCode = 16
OptionRootPath OptionCode = 17
OptionExtensionsPath OptionCode = 18
OptionIPForwarding OptionCode = 19
OptionNonLocalSourceRouting OptionCode = 20
OptionPolicyFilter OptionCode = 21
OptionMaximumDatagramAssemblySize OptionCode = 22
OptionDefaultIPTTL OptionCode = 23
OptionPathMTUAgingTimeout OptionCode = 24
OptionPathMTUPlateauTable OptionCode = 25
OptionInterfaceMTU OptionCode = 26
OptionAllSubnetsAreLocal OptionCode = 27
OptionBroadcastAddress OptionCode = 28
OptionPerformMaskDiscovery OptionCode = 29
OptionMaskSupplier OptionCode = 30
OptionPerformRouterDiscovery OptionCode = 31
OptionRouterSolicitationAddress OptionCode = 32
OptionStaticRoutingTable OptionCode = 33
OptionTrailerEncapsulation OptionCode = 34
OptionArpCacheTimeout OptionCode = 35
OptionEthernetEncapsulation OptionCode = 36
OptionDefaulTCPTTL OptionCode = 37
OptionTCPKeepaliveInterval OptionCode = 38
OptionTCPKeepaliveGarbage OptionCode = 39
OptionNetworkInformationServiceDomain OptionCode = 40
OptionNetworkInformationServers OptionCode = 41
OptionNTPServers OptionCode = 42
OptionVendorSpecificInformation OptionCode = 43
OptionNetBIOSOverTCPIPNameServer OptionCode = 44
OptionNetBIOSOverTCPIPDatagramDistributionServer OptionCode = 45
OptionNetBIOSOverTCPIPNodeType OptionCode = 46
OptionNetBIOSOverTCPIPScope OptionCode = 47
OptionXWindowSystemFontServer OptionCode = 48
OptionXWindowSystemDisplayManger OptionCode = 49
OptionRequestedIPAddress OptionCode = 50
OptionIPAddressLeaseTime OptionCode = 51
OptionOptionOverload OptionCode = 52
OptionDHCPMessageType OptionCode = 53
OptionServerIdentifier OptionCode = 54
OptionParameterRequestList OptionCode = 55
OptionMessage OptionCode = 56
OptionMaximumDHCPMessageSize OptionCode = 57
OptionRenewTimeValue OptionCode = 58
OptionRebindingTimeValue OptionCode = 59
OptionClassIdentifier OptionCode = 60
OptionClientIdentifier OptionCode = 61
OptionNetWareIPDomainName OptionCode = 62
OptionNetWareIPInformation OptionCode = 63
OptionNetworkInformationServicePlusDomain OptionCode = 64
OptionNetworkInformationServicePlusServers OptionCode = 65
OptionTFTPServerName OptionCode = 66
OptionBootfileName OptionCode = 67
OptionMobileIPHomeAgent OptionCode = 68
OptionSimpleMailTransportProtocolServer OptionCode = 69
OptionPostOfficeProtocolServer OptionCode = 70
OptionNetworkNewsTransportProtocolServer OptionCode = 71
OptionDefaultWorldWideWebServer OptionCode = 72
OptionDefaultFingerServer OptionCode = 73
OptionDefaultInternetRelayChatServer OptionCode = 74
OptionStreetTalkServer OptionCode = 75
OptionStreetTalkDirectoryAssistanceServer OptionCode = 76
OptionUserClassInformation OptionCode = 77
OptionSLPDirectoryAgent OptionCode = 78
OptionSLPServiceScope OptionCode = 79
OptionRapidCommit OptionCode = 80
OptionFQDN OptionCode = 81
OptionRelayAgentInformation OptionCode = 82
OptionInternetStorageNameService OptionCode = 83
// Option 84 returned in RFC 3679
OptionNDSServers OptionCode = 85
OptionNDSTreeName OptionCode = 86
OptionNDSContext OptionCode = 87
OptionBCMCSControllerDomainNameList OptionCode = 88
OptionBCMCSControllerIPv4AddressList OptionCode = 89
OptionAuthentication OptionCode = 90
OptionClientLastTransactionTime OptionCode = 91
OptionAssociatedIP OptionCode = 92
OptionClientSystemArchitectureType OptionCode = 93
OptionClientNetworkInterfaceIdentifier OptionCode = 94
OptionLDAP OptionCode = 95
// Option 96 returned in RFC 3679
OptionClientMachineIdentifier OptionCode = 97
OptionOpenGroupUserAuthentication OptionCode = 98
OptionGeoConfCivic OptionCode = 99
OptionIEEE10031TZString OptionCode = 100
OptionReferenceToTZDatabase OptionCode = 101
// Options 102-111 returned in RFC 3679
OptionNetInfoParentServerAddress OptionCode = 112
OptionNetInfoParentServerTag OptionCode = 113
OptionURL OptionCode = 114
// Option 115 returned in RFC 3679
OptionAutoConfigure OptionCode = 116
OptionNameServiceSearch OptionCode = 117
OptionSubnetSelection OptionCode = 118
OptionDNSDomainSearchList OptionCode = 119
OptionSIPServersDHCPOption OptionCode = 120
OptionClasslessStaticRouteOption OptionCode = 121
OptionCCC OptionCode = 122
OptionGeoConf OptionCode = 123
OptionVendorIdentifyingVendorClass OptionCode = 124
OptionVendorIdentifyingVendorSpecific OptionCode = 125
// Options 126-127 returned in RFC 3679
OptionTFTPServerIPAddress OptionCode = 128
OptionCallServerIPAddress OptionCode = 129
OptionDiscriminationString OptionCode = 130
OptionRemoteStatisticsServerIPAddress OptionCode = 131
Option8021PVLANID OptionCode = 132
Option8021QL2Priority OptionCode = 133
OptionDiffservCodePoint OptionCode = 134
OptionHTTPProxyForPhoneSpecificApplications OptionCode = 135
OptionPANAAuthenticationAgent OptionCode = 136
OptionLoSTServer OptionCode = 137
OptionCAPWAPAccessControllerAddresses OptionCode = 138
OptionOPTIONIPv4AddressMoS OptionCode = 139
OptionOPTIONIPv4FQDNMoS OptionCode = 140
OptionSIPUAConfigurationServiceDomains OptionCode = 141
OptionOPTIONIPv4AddressANDSF OptionCode = 142
OptionOPTIONIPv6AddressANDSF OptionCode = 143
// Options 144-149 returned in RFC 3679
OptionTFTPServerAddress OptionCode = 150
OptionStatusCode OptionCode = 151
OptionBaseTime OptionCode = 152
OptionStartTimeOfState OptionCode = 153
OptionQueryStartTime OptionCode = 154
OptionQueryEndTime OptionCode = 155
OptionDHCPState OptionCode = 156
OptionDataSource OptionCode = 157
// Options 158-174 returned in RFC 3679
OptionEtherboot OptionCode = 175
OptionIPTelephone OptionCode = 176
OptionEtherbootPacketCableAndCableHome OptionCode = 177
// Options 178-207 returned in RFC 3679
OptionPXELinuxMagicString OptionCode = 208
OptionPXELinuxConfigFile OptionCode = 209
OptionPXELinuxPathPrefix OptionCode = 210
OptionPXELinuxRebootTime OptionCode = 211
OptionOPTION6RD OptionCode = 212
OptionOPTIONv4AccessDomain OptionCode = 213
// Options 214-219 returned in RFC 3679
OptionSubnetAllocation OptionCode = 220
OptionVirtualSubnetAllocation OptionCode = 221
// Options 222-223 returned in RFC 3679
// Options 224-254 are reserved for private use
OptionEnd OptionCode = 255
)
func (o OptionCode) String() string {
if s, ok := optionCodeToString[o]; ok {
return s
}
return "Unknown"
}
var optionCodeToString = map[OptionCode]string{
OptionPad: "Pad",
OptionSubnetMask: "Subnet Mask",
OptionTimeOffset: "Time Offset",
OptionRouter: "Router",
OptionTimeServer: "Time Server",
OptionNameServer: "Name Server",
OptionDomainNameServer: "Domain Name Server",
OptionLogServer: "Log Server",
OptionQuoteServer: "Quote Server",
OptionLPRServer: "LPR Server",
OptionImpressServer: "Impress Server",
OptionResourceLocationServer: "Resource Location Server",
OptionHostName: "Host Name",
OptionBootFileSize: "Boot File Size",
OptionMeritDumpFile: "Merit Dump File",
OptionDomainName: "Domain Name",
OptionSwapServer: "Swap Server",
OptionRootPath: "Root Path",
OptionExtensionsPath: "Extensions Path",
OptionIPForwarding: "IP Forwarding enable/disable",
OptionNonLocalSourceRouting: "Non-local Source Routing enable/disable",
OptionPolicyFilter: "Policy Filter",
OptionMaximumDatagramAssemblySize: "Maximum Datagram Reassembly Size",
OptionDefaultIPTTL: "Default IP Time-to-live",
OptionPathMTUAgingTimeout: "Path MTU Aging Timeout",
OptionPathMTUPlateauTable: "Path MTU Plateau Table",
OptionInterfaceMTU: "Interface MTU",
OptionAllSubnetsAreLocal: "All Subnets Are Local",
OptionBroadcastAddress: "Broadcast Address",
OptionPerformMaskDiscovery: "Perform Mask Discovery",
OptionMaskSupplier: "Mask Supplier",
OptionPerformRouterDiscovery: "Perform Router Discovery",
OptionRouterSolicitationAddress: "Router Solicitation Address",
OptionStaticRoutingTable: "Static Routing Table",
OptionTrailerEncapsulation: "Trailer Encapsulation",
OptionArpCacheTimeout: "ARP Cache Timeout",
OptionEthernetEncapsulation: "Ethernet Encapsulation",
OptionDefaulTCPTTL: "Default TCP TTL",
OptionTCPKeepaliveInterval: "TCP Keepalive Interval",
OptionTCPKeepaliveGarbage: "TCP Keepalive Garbage",
OptionNetworkInformationServiceDomain: "Network Information Service Domain",
OptionNetworkInformationServers: "Network Information Servers",
OptionNTPServers: "NTP Servers",
OptionVendorSpecificInformation: "Vendor Specific Information",
OptionNetBIOSOverTCPIPNameServer: "NetBIOS over TCP/IP Name Server",
OptionNetBIOSOverTCPIPDatagramDistributionServer: "NetBIOS over TCP/IP Datagram Distribution Server",
OptionNetBIOSOverTCPIPNodeType: "NetBIOS over TCP/IP Node Type",
OptionNetBIOSOverTCPIPScope: "NetBIOS over TCP/IP Scope",
OptionXWindowSystemFontServer: "X Window System Font Server",
OptionXWindowSystemDisplayManger: "X Window System Display Manager",
OptionRequestedIPAddress: "Requested IP Address",
OptionIPAddressLeaseTime: "IP Addresses Lease Time",
OptionOptionOverload: "Option Overload",
OptionDHCPMessageType: "DHCP Message Type",
OptionServerIdentifier: "Server Identifier",
OptionParameterRequestList: "Parameter Request List",
OptionMessage: "Message",
OptionMaximumDHCPMessageSize: "Maximum DHCP Message Size",
OptionRenewTimeValue: "Renew Time Value",
OptionRebindingTimeValue: "Rebinding Time Value",
OptionClassIdentifier: "Class Identifier",
OptionClientIdentifier: "Client identifier",
OptionNetWareIPDomainName: "NetWare/IP Domain Name",
OptionNetWareIPInformation: "NetWare/IP Information",
OptionNetworkInformationServicePlusDomain: "Network Information Service+ Domain",
OptionNetworkInformationServicePlusServers: "Network Information Service+ Servers",
OptionTFTPServerName: "TFTP Server Name",
OptionBootfileName: "Bootfile Name",
OptionMobileIPHomeAgent: "Mobile IP Home Agent",
OptionSimpleMailTransportProtocolServer: "SMTP Server",
OptionPostOfficeProtocolServer: "POP Server",
OptionNetworkNewsTransportProtocolServer: "NNTP Server",
OptionDefaultWorldWideWebServer: "Default WWW Server",
OptionDefaultFingerServer: "Default Finger Server",
OptionDefaultInternetRelayChatServer: "Default IRC Server",
OptionStreetTalkServer: "StreetTalk Server",
OptionStreetTalkDirectoryAssistanceServer: "StreetTalk Directory Assistance Server",
OptionUserClassInformation: "User Class Information",
OptionSLPDirectoryAgent: "SLP DIrectory Agent",
OptionSLPServiceScope: "SLP Service Scope",
OptionRapidCommit: "Rapid Commit",
OptionFQDN: "FQDN",
OptionRelayAgentInformation: "Relay Agent Information",
OptionInternetStorageNameService: "Internet Storage Name Service",
// Option 84 returned in RFC 3679
OptionNDSServers: "NDS Servers",
OptionNDSTreeName: "NDS Tree Name",
OptionNDSContext: "NDS Context",
OptionBCMCSControllerDomainNameList: "BCMCS Controller Domain Name List",
OptionBCMCSControllerIPv4AddressList: "BCMCS Controller IPv4 Address List",
OptionAuthentication: "Authentication",
OptionClientLastTransactionTime: "Client Last Transaction Time",
OptionAssociatedIP: "Associated IP",
OptionClientSystemArchitectureType: "Client System Architecture Type",
OptionClientNetworkInterfaceIdentifier: "Client Network Interface Identifier",
OptionLDAP: "LDAP",
// Option 96 returned in RFC 3679
OptionClientMachineIdentifier: "Client Machine Identifier",
OptionOpenGroupUserAuthentication: "OpenGroup's User Authentication",
OptionGeoConfCivic: "GEOCONF_CIVIC",
OptionIEEE10031TZString: "IEEE 1003.1 TZ String",
OptionReferenceToTZDatabase: "Reference to the TZ Database",
// Options 102-111 returned in RFC 3679
OptionNetInfoParentServerAddress: "NetInfo Parent Server Address",
OptionNetInfoParentServerTag: "NetInfo Parent Server Tag",
OptionURL: "URL",
// Option 115 returned in RFC 3679
OptionAutoConfigure: "Auto-Configure",
OptionNameServiceSearch: "Name Service Search",
OptionSubnetSelection: "Subnet Selection",
OptionDNSDomainSearchList: "DNS Domain Search List",
OptionSIPServersDHCPOption: "SIP Servers DHCP Option",
OptionClasslessStaticRouteOption: "Classless Static Route Option",
OptionCCC: "CCC, CableLabs Client Configuration",
OptionGeoConf: "GeoConf",
OptionVendorIdentifyingVendorClass: "Vendor-Identifying Vendor Class",
OptionVendorIdentifyingVendorSpecific: "Vendor-Identifying Vendor-Specific",
// Options 126-127 returned in RFC 3679
OptionTFTPServerIPAddress: "TFTP Server IP Address",
OptionCallServerIPAddress: "Call Server IP Address",
OptionDiscriminationString: "Discrimination String",
OptionRemoteStatisticsServerIPAddress: "RemoteStatistics Server IP Address",
Option8021PVLANID: "802.1P VLAN ID",
Option8021QL2Priority: "802.1Q L2 Priority",
OptionDiffservCodePoint: "Diffserv Code Point",
OptionHTTPProxyForPhoneSpecificApplications: "HTTP Proxy for phone-specific applications",
OptionPANAAuthenticationAgent: "PANA Authentication Agent",
OptionLoSTServer: "LoST Server",
OptionCAPWAPAccessControllerAddresses: "CAPWAP Access Controller Addresses",
OptionOPTIONIPv4AddressMoS: "OPTION-IPv4_Address-MoS",
OptionOPTIONIPv4FQDNMoS: "OPTION-IPv4_FQDN-MoS",
OptionSIPUAConfigurationServiceDomains: "SIP UA Configuration Service Domains",
OptionOPTIONIPv4AddressANDSF: "OPTION-IPv4_Address-ANDSF",
OptionOPTIONIPv6AddressANDSF: "OPTION-IPv6_Address-ANDSF",
// Options 144-149 returned in RFC 3679
OptionTFTPServerAddress: "TFTP Server Address",
OptionStatusCode: "Status Code",
OptionBaseTime: "Base Time",
OptionStartTimeOfState: "Start Time of State",
OptionQueryStartTime: "Query Start Time",
OptionQueryEndTime: "Query End Time",
OptionDHCPState: "DHCP Staet",
OptionDataSource: "Data Source",
// Options 158-174 returned in RFC 3679
OptionEtherboot: "Etherboot",
OptionIPTelephone: "IP Telephone",
OptionEtherbootPacketCableAndCableHome: "Etherboot / PacketCable and CableHome",
// Options 178-207 returned in RFC 3679
OptionPXELinuxMagicString: "PXELinux Magic String",
OptionPXELinuxConfigFile: "PXELinux Config File",
OptionPXELinuxPathPrefix: "PXELinux Path Prefix",
OptionPXELinuxRebootTime: "PXELinux Reboot Time",
OptionOPTION6RD: "OPTION_6RD",
OptionOPTIONv4AccessDomain: "OPTION_V4_ACCESS_DOMAIN",
// Options 214-219 returned in RFC 3679
OptionSubnetAllocation: "Subnet Allocation",
OptionVirtualSubnetAllocation: "Virtual Subnet Selection",
// Options 222-223 returned in RFC 3679
// Options 224-254 are reserved for private use
OptionEnd: "End",
}
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