connection

package
v0.0.0-...-ebbddde Latest Latest
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 Go to latest Published: Mar 25, 2019 License: MIT Imports: 13 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	MAXUDPReceivedPacketSize = 8192
)

Variables

View Source 
var (
	DefaultReadTimeout       = 2 * time.Second
	DefaultWriteTimeout      = 2 * time.Second
	DefaultParamsRequestList = []layers.DHCPOpt{
		layers.DHCPOptSubnetMask,
		layers.DHCPOptRouter,
		layers.DHCPOptTimeServer,
		layers.DHCPOptDNS,
		layers.DHCPOptDomainName,
		layers.DHCPOptInterfaceMTU,
		layers.DHCPOptNTPServers,
	}
)

Functions

func CreateExecutor 

func CreateExecutor(client *DhcpClient) bender.RequestExecutor

CreateExecutor creates a new DHCPv4 RequestExecutor.

func NewPacket 

func NewPacket(dhcpOptions ...layers.DHCPOption) *layers.DHCPv4

func NewRequestFromOffer 

func NewRequestFromOffer(packet *layers.DHCPv4) *layers.DHCPv4

func ParsePacket 

func ParsePacket(data []byte, decoder gopacket.Decoder) *layers.DHCPv4

func WithNetboot 

func WithNetboot(d *layers.DHCPv4)

WithNetboot adds bootfile URL and bootfile param options to a layers.DHCPv4 packet.

Types

type Callback 

type Callback func(*Lease)

type DhcpClient 

type DhcpClient struct {
	//ClientMac net.HardwareAddr
	Iface      *net.Interface
	BufferSize int
	// contains filtered or unexported fields
}

DhcpClient

func (*DhcpClient) Close 

func (dc *DhcpClient) Close() error

func (*DhcpClient) GetRequestAndResponse 

func (dc *DhcpClient) GetRequestAndResponse() (request int, response int)

func (*DhcpClient) Open 

func (dc *DhcpClient) Open() error

func (*DhcpClient) Send 

func (dc *DhcpClient) Send(packet *layers.DHCPv4, modifiers ...Modifier) *PacketResponse

func (*DhcpClient) Start 

func (dc *DhcpClient) Start(size int, ifRequest bool, ifLog bool)

func (*DhcpClient) Stop 

func (dc *DhcpClient) Stop()

type Dialer 

type Dialer func(*net.UDPAddr, *net.UDPAddr) (net.Conn, error)

func UDPDialer 

func UDPDialer() Dialer

type IPacketEventDispatcher 

type IPacketEventDispatcher interface {
	AddEventListener(eventType string, handler PacketEventHandler)
	RemoveEventListener(eventType string)
	HasEventListener(eventType string) bool
	DispatchEvent(event PacketEvent)
}

type Lease 

type Lease struct {
	ServerID     net.IP
	FixedAddress net.IP
	Netmask      net.IPMask
	NextServer   net.IP
	Broadcast    net.IP
	Router       []net.IP
	DNS          []net.IP
	TimeServer   []net.IP
	DomainName   string
	MTU          uint16

	Bound  time.Time
	Renew  time.Time
	Rebind time.Time
	Expire time.Time
}

func NewLease 

func NewLease(packet *layers.DHCPv4) (msgType layers.DHCPMsgType, lease Lease)

type Listener 

type Listener func(*net.Interface) (net.PacketConn, error)

func UDPListener 

func UDPListener() Listener

type Modifier 

type Modifier func(*layers.DHCPv4)

func WithBroadcast 

func WithBroadcast(broadcast bool) Modifier

WithBroadcast sets the packet to be broadcast or unicast

func WithClientIP 

func WithClientIP(ip net.IP) Modifier

WithClientIP sets the Client IP for a layers.DHCPv4 packet.

func WithGeneric 

func WithGeneric(code layers.DHCPOpt, value []byte) Modifier

func WithHWType 

func WithHWType(hwt layers.LinkType) Modifier

WithHWType sets the Hardware Type for a layers.DHCPv4 packet.

func WithHostName 

func WithHostName(hostname string) Modifier

func WithHwAddr 

func WithHwAddr(hwaddr net.HardwareAddr) Modifier

WithHwAddr sets the hardware address for a packet

func WithLeaseTime 

func WithLeaseTime(leaseTime uint32) Modifier

WithLeaseTime adds or updates an OptIPAddressLeaseTime

func WithMessageType 

func WithMessageType(m layers.DHCPMsgType) Modifier

WithMessageType adds the layers.DHCPv4 message type m to a packet.

func WithNetmask 

func WithNetmask(mask net.IPMask) Modifier

WithNetmask adds or updates an OptSubnetMask

func WithOption 

func WithOption(opt layers.DHCPOpt, data []byte) Modifier

WithOption appends a layers.DHCPv4 option provided by the user

func WithRelay 

func WithRelay(ip net.IP) Modifier

WithRelay adds parameters required for layers.DHCPv4 to be relayed by the relay server with given ip

func WithReply 

func WithReply(request *layers.DHCPv4) Modifier

WithReply fills in opcode, hwtype, xid, clienthwaddr, flags, and gateway ip addr from the given packet.

func WithRequestedOptions 

func WithRequestedOptions(optionCodes ...layers.DHCPOpt) Modifier

WithRequestedOptions adds requested options to the packet.

func WithServerIP 

func WithServerIP(ip net.IP) Modifier

WithServerIP sets the Server IP for a layers.DHCPv4 packet.

func WithTransactionID 

func WithTransactionID(xid uint32) Modifier

WithTransactionID sets the Transaction ID for a layers.DHCPv4 packet.

func WithYourIP 

func WithYourIP(ip net.IP) Modifier

WithYourIP sets the Your IP for a layers.DHCPv4 packet.

type PacketEvent 

type PacketEvent struct {
	Target IPacketEventDispatcher
	Type   string
	// contains filtered or unexported fields
}

func NewEvent 

func NewEvent(eventType string, object interface{}) PacketEvent

type PacketEventDispatcher 

type PacketEventDispatcher struct {
	// contains filtered or unexported fields
}

func (*PacketEventDispatcher) AddEventListener 

func (pd *PacketEventDispatcher) AddEventListener(eventType string, handler PacketEventHandler)

func (*PacketEventDispatcher) DispatchEvent 

func (pd *PacketEventDispatcher) DispatchEvent(event PacketEvent)

func (*PacketEventDispatcher) HasEventListener 

func (pd *PacketEventDispatcher) HasEventListener(eventType string) bool

func (*PacketEventDispatcher) RemoveEventListener 

func (pd *PacketEventDispatcher) RemoveEventListener(eventType string)

type PacketEventHandler 

type PacketEventHandler func(e PacketEvent)

type PacketEventListener 

type PacketEventListener struct {
	Type    string
	Handler PacketEventHandler
}

type PacketResponse 

type PacketResponse struct {
	// contains filtered or unexported fields
}

func NewPacketResponse 

func NewPacketResponse() *PacketResponse

func (*PacketResponse) AddPacket 

func (pr *PacketResponse) AddPacket(packet *layers.DHCPv4)

func (*PacketResponse) Call 

func (pr *PacketResponse) Call(event PacketEvent)

type TransPort 

type TransPort struct {
	Dialer   Dialer
	Listener Listener
}

func (*TransPort) Dial 

func (t *TransPort) Dial(l *net.UDPAddr, r *net.UDPAddr) (net.Conn, error)

func (*TransPort) Listen 

func (t *TransPort) Listen(l *net.Interface) (net.PacketConn, error)

Source Files

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