packetv3

package
v0.0.3-pre4.0...-0ec3cfc Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Oct 21, 2020 License: Apache-2.0 Imports: 8 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	RouterOptV6 uint16 = 1 << iota
	RouterOptE

	RouterOptN
	RouterOptR
	RouterOptDC

	RouterOptAF
)

bitmasks for flags in RouterOptions

View Source 
const (
	LSATypeUnknown         LSAType = 0
	LSATypeRouter                  = 0x2001
	LSATypeNetwork                 = 0x2002
	LSATypeInterAreaPrefix         = 0x2003
	LSATypeInterAreaRouter         = 0x2004
	LSATypeASExternal              = 0x4005
	LSATypeDeprecated              = 0x2006
	LSATypeNSSA                    = 0x2007
	LSATypeLink                    = 0x0008
	LSATypeIntraAreaPrefix         = 0x2009
)

OSPF LSA types

View Source 
const (
	ASExtLSAFlagT uint8 = 1 << iota
	ASExtLSAFlagF
	ASExtLSAFlagE
)

Bitmasks for flags used in ASExternalLSA

View Source 
const (
	NUBIT = 1
	LABIT = 2
	PBIT  = 8
	DNBIT = 16
)

Prefix Option Bits

View Source 
const LSAHeaderLength = 20
View Source 
const OSPFProtocolNumber = 89
View Source 
const OSPFv3MessageChecksumAtByte = 12
View Source 
const OSPFv3MessageHeaderLength = 16
View Source 
const OSPFv3MessagePacketLengthAtByte = 2

Variables

This section is empty.

Functions

func OSPFv3Checksum 

func OSPFv3Checksum(data []byte, src, dst net.IP) uint16

Types

type ASExternalLSA 

type ASExternalLSA struct {
	Flags  uint8
	Metric uint32 // max: 24 bit
	Prefix LSAPrefix

	ForwardingAddress     net.IP // optional
	ExternalRouteTag      uint32 // optional
	ReferencedLinkStateID ID     // optional
}

func DeserializeASExternalLSA 

func DeserializeASExternalLSA(buf *bytes.Buffer) (*ASExternalLSA, int, error)

func (*ASExternalLSA) FlagE 

func (a *ASExternalLSA) FlagE() bool

func (*ASExternalLSA) FlagF 

func (a *ASExternalLSA) FlagF() bool

func (*ASExternalLSA) FlagT 

func (a *ASExternalLSA) FlagT() bool

func (*ASExternalLSA) Serialize 

func (x *ASExternalLSA) Serialize(buf *bytes.Buffer)

type AreaLinkDescription 

type AreaLinkDescription struct {
	Type                AreaLinkDescriptionType
	Metric              uint32 // max: 24 bit
	InterfaceID         ID
	NeighborInterfaceID ID
	NeighborRouterID    ID
}

func DeserializeAreaLinkDescription 

func DeserializeAreaLinkDescription(buf *bytes.Buffer) (AreaLinkDescription, int, error)

func (*AreaLinkDescription) Serialize 

func (x *AreaLinkDescription) Serialize(buf *bytes.Buffer)

type AreaLinkDescriptionType 

type AreaLinkDescriptionType uint8
const (
	ALDTypePTP AreaLinkDescriptionType
	ALDTypeTransit
	ALDTypeReserved
	ALDTypeVirtualLink
)

type DBFlags 

type DBFlags uint8
const (
	DBFlagInit DBFlags = 1 << iota
	DBFlagMore
	DBFlagMS
)

database description flags

type DatabaseDescription 

type DatabaseDescription struct {
	Options          RouterOptions
	InterfaceMTU     uint16
	DBFlags          DBFlags
	DDSequenceNumber uint32
	LSAHeaders       []*LSA
}

func DeserializeDatabaseDescription 

func DeserializeDatabaseDescription(buf *bytes.Buffer, bodyLength uint16) (*DatabaseDescription, int, error)

func (*DatabaseDescription) Serialize 

func (x *DatabaseDescription) Serialize(buf *bytes.Buffer)

type FloodingScope 

type FloodingScope uint8
const (
	FloodLinkLocal FloodingScope = iota
	FloodArea
	FloodAS
	FloodReserved
)

type Hello 

type Hello struct {
	InterfaceID              ID
	RouterPriority           uint8
	Options                  RouterOptions
	HelloInterval            uint16
	RouterDeadInterval       uint16
	DesignatedRouterID       ID
	BackupDesignatedRouterID ID
	Neighbors                []ID
}

func DeserializeHello 

func DeserializeHello(buf *bytes.Buffer, bodyLength uint16) (*Hello, int, error)

func (*Hello) Serialize 

func (x *Hello) Serialize(buf *bytes.Buffer)

type ID 

type ID uint32

ID is a common type used for 32-bit IDs in OSPF

func DeserializeID 

func DeserializeID(buf *bytes.Buffer) (ID, int, error)

func (ID) Serialize 

func (i ID) Serialize(buf *bytes.Buffer)

type InterAreaPrefixLSA 

type InterAreaPrefixLSA struct {
	Metric uint32 // max: 24 bit
	Prefix LSAPrefix
}

func DeserializeInterAreaPrefixLSA 

func DeserializeInterAreaPrefixLSA(buf *bytes.Buffer) (*InterAreaPrefixLSA, int, error)

func (*InterAreaPrefixLSA) Serialize 

func (x *InterAreaPrefixLSA) Serialize(buf *bytes.Buffer)

type InterAreaRouterLSA 

type InterAreaRouterLSA struct {
	Options             RouterOptions
	Metric              uint32 // max: 24 bit
	DestinationRouterID ID
}

func DeserializeInterAreaRouterLSA 

func DeserializeInterAreaRouterLSA(buf *bytes.Buffer) (*InterAreaRouterLSA, int, error)

func (*InterAreaRouterLSA) Serialize 

func (x *InterAreaRouterLSA) Serialize(buf *bytes.Buffer)

type IntraAreaPrefixLSA 

type IntraAreaPrefixLSA struct {
	ReferencedLSType            LSAType
	ReferencedLinkStateID       ID
	ReferencedAdvertisingRouter ID
	Prefixes                    []LSAPrefix
}

func DeserializeIntraAreaPrefixLSA 

func DeserializeIntraAreaPrefixLSA(buf *bytes.Buffer) (*IntraAreaPrefixLSA, int, error)

func (*IntraAreaPrefixLSA) Serialize 

func (x *IntraAreaPrefixLSA) Serialize(buf *bytes.Buffer)

type LSA 

type LSA struct {
	Age               uint16
	Type              LSAType
	ID                ID
	AdvertisingRouter ID
	SequenceNumber    uint32
	Checksum          uint16
	Length            uint16
	Body              Serializable
}

func DeserializeLSA 

func DeserializeLSA(buf *bytes.Buffer) (*LSA, int, error)

func DeserializeLSAHeader 

func DeserializeLSAHeader(buf *bytes.Buffer) (*LSA, int, error)

func (*LSA) ReadBody 

func (x *LSA) ReadBody(buf *bytes.Buffer) (int, error)

func (*LSA) Serialize 

func (x *LSA) Serialize(buf *bytes.Buffer)

func (*LSA) SerializeHeader 

func (x *LSA) SerializeHeader(buf *bytes.Buffer)

type LSAPrefix 

type LSAPrefix struct {
	PrefixLength uint8
	Options      PrefixOptions

	// this may represent different things
	// used for metric or referenced LSType
	Special uint16

	Address net.IP
}

func DeserializeLSAPrefix 

func DeserializeLSAPrefix(buf *bytes.Buffer) (LSAPrefix, int, error)

func (*LSAPrefix) Serialize 

func (x *LSAPrefix) Serialize(buf *bytes.Buffer)

func (*LSAPrefix) ToNetPrefix 

func (x *LSAPrefix) ToNetPrefix() net.Prefix

type LSAType 

type LSAType uint16

func (LSAType) FloodIfUnknown 

func (t LSAType) FloodIfUnknown() bool

func (LSAType) FloodingScope 

func (t LSAType) FloodingScope() FloodingScope

func (LSAType) Serialize 

func (t LSAType) Serialize(buf *bytes.Buffer)

type LinkLSA 

type LinkLSA struct {
	RouterPriority            uint8
	Options                   RouterOptions
	LinkLocalInterfaceAddress net.IP
	PrefixNum                 uint32
	Prefixes                  []LSAPrefix
}

func DeserializeLinkLSA 

func DeserializeLinkLSA(buf *bytes.Buffer) (*LinkLSA, int, error)

func (*LinkLSA) Serialize 

func (x *LinkLSA) Serialize(buf *bytes.Buffer)

type LinkStateAcknowledgement 

type LinkStateAcknowledgement []*LSA

func DeserializeLinkStateAcknowledgement 

func DeserializeLinkStateAcknowledgement(buf *bytes.Buffer, bodyLength uint16) (LinkStateAcknowledgement, int, error)

func (LinkStateAcknowledgement) Serialize 

func (x LinkStateAcknowledgement) Serialize(buf *bytes.Buffer)

type LinkStateRequest 

type LinkStateRequest struct {
	LSType            LSAType
	LinkStateID       ID
	AdvertisingRouter ID
}

func DeserializeLinkStateRequest 

func DeserializeLinkStateRequest(buf *bytes.Buffer) (LinkStateRequest, int, error)

func (*LinkStateRequest) Serialize 

func (x *LinkStateRequest) Serialize(buf *bytes.Buffer)

type LinkStateRequestMsg 

type LinkStateRequestMsg []LinkStateRequest

func DeserializeLinkStateRequestMsg 

func DeserializeLinkStateRequestMsg(buf *bytes.Buffer, bodyLength uint16) (LinkStateRequestMsg, int, error)

func (LinkStateRequestMsg) Serialize 

func (x LinkStateRequestMsg) Serialize(buf *bytes.Buffer)

type LinkStateUpdate 

type LinkStateUpdate []*LSA

func DeserializeLinkStateUpdate 

func DeserializeLinkStateUpdate(buf *bytes.Buffer) (LinkStateUpdate, int, error)

func (LinkStateUpdate) Serialize 

func (x LinkStateUpdate) Serialize(buf *bytes.Buffer)

type NetworkLSA 

type NetworkLSA struct {
	Options        RouterOptions
	AttachedRouter []ID
}

func DeserializeNetworkLSA 

func DeserializeNetworkLSA(buf *bytes.Buffer, bodyLength uint16) (*NetworkLSA, int, error)

func (*NetworkLSA) Serialize 

func (x *NetworkLSA) Serialize(buf *bytes.Buffer)

type OSPFMessageType 

type OSPFMessageType uint8
const (
	MsgTypeUnknown OSPFMessageType = iota
	MsgTypeHello
	MsgTypeDatabaseDescription
	MsgTypeLinkStateRequest
	MsgTypeLinkStateUpdate
	MsgTypeLinkStateAcknowledgment
)

OSPF message types

type OSPFv3Message 

type OSPFv3Message struct {
	Version      uint8
	Type         OSPFMessageType
	PacketLength uint16
	RouterID     ID
	AreaID       ID
	Checksum     uint16
	InstanceID   uint8
	Body         Serializable
}

func DeserializeOSPFv3Message 

func DeserializeOSPFv3Message(buf *bytes.Buffer, src, dst net.IP) (*OSPFv3Message, int, error)

func (*OSPFv3Message) ReadBody 

func (m *OSPFv3Message) ReadBody(buf *bytes.Buffer) (int, error)

func (*OSPFv3Message) Serialize 

func (x *OSPFv3Message) Serialize(out *bytes.Buffer, src, dst net.IP)

type PrefixOptions 

type PrefixOptions struct {
	NoUnicast    bool // NU-bit
	LocalAddress bool // LA-bit
	Propagate    bool // P-bit
	DN           bool // DN-bit
}

func (PrefixOptions) Serialize 

func (o PrefixOptions) Serialize(buf *bytes.Buffer)

type RouterLSA 

type RouterLSA struct {
	Flags            RouterLSAFlags
	Options          RouterOptions
	LinkDescriptions []AreaLinkDescription
}

func DeserializeRouterLSA 

func DeserializeRouterLSA(buf *bytes.Buffer, bodyLength uint16) (*RouterLSA, int, error)

func (*RouterLSA) Serialize 

func (x *RouterLSA) Serialize(buf *bytes.Buffer)

type RouterLSAFlags 

type RouterLSAFlags uint8
const (
	RouterLSAFlagBorder RouterLSAFlags = 1 << iota
	RouterLSAFlagExternal
	RouterLSAFlagVirtualLink

	RouterLSAFlagNSSATranslation
)

func RouterLSAFlagsFrom 

func RouterLSAFlagsFrom(flags ...RouterLSAFlags) RouterLSAFlags

func (RouterLSAFlags) HasFlag 

func (f RouterLSAFlags) HasFlag(flag uint8) bool

func (RouterLSAFlags) SetFlag 

func (f RouterLSAFlags) SetFlag(flag uint8) uint8

type RouterOptions 

type RouterOptions struct {
	Flags uint16
	// contains filtered or unexported fields
}

func OptionsFromFlags 

func OptionsFromFlags(flags ...uint16) RouterOptions

func (RouterOptions) HasFlag 

func (r RouterOptions) HasFlag(flag uint16) bool

func (*RouterOptions) Serialize 

func (r *RouterOptions) Serialize(buf *bytes.Buffer)

func (RouterOptions) SetFlag 

func (r RouterOptions) SetFlag(flag uint16) RouterOptions

type Serializable 

type Serializable interface {
	Serialize(buf *bytes.Buffer)
}

Serializable represents any packet which can be serialized to bytes to be on the wire

type UnknownLSA 

type UnknownLSA []byte

func (UnknownLSA) Serialize 

func (u UnknownLSA) Serialize(buf *bytes.Buffer)

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