UDP client for Diarkis server that handles UDP messaging and RUDP messages. The class receives messages from the server via event callbacks. More...

Inheritance diagram for Diarkis.Udp:

Public Member Functions
delegate void	OfflineHandler ()

delegate void	PacketHandler (byte[] packet, string senderAddress)

delegate void	ResponseHandler (uint ver, uint cmd, uint status, byte[] payload, bool reliable)

delegate void	PushHandler (uint ver, uint cmd, byte[] payload, bool reliable)

delegate void	EchoHandler (double echoTime, string myAddress)

delegate void	PingHandler (double pingTime, string myAddress)

delegate void	ConnectHandler (int status, bool reconnected)

delegate void	DisconnectHandler (bool reconnecting)

delegate void	ExceptionHandler (int errCode, string errMsg)

delegate void	ResetHandler ()

delegate void	AddressChangeHandler (string oldAddr, string newAddr)

	Udp (int sendInterval=200, int echoInterval=5000)
	Initializes an instance of . More...

void	EnableSendImmediate ()
	Enables UDP messages to be sent immediately instead of being bufferred. More...

string	GetServerEndPoint ()
	Returns the server endpoint that the client is conencted to as a string. More...

int	GetDisconnectionReason ()
	Returns the cause of disconnection as enum DISCONN_EXPECTED Disconnection was expected and there was no error DISCONN_NO_RESPONSE Could not get a response from the server DISCONN_RETRY_TIMEOUT RUDP retries took too long More...

void	SetClientKey (string clientKey)
	Sets up client key and send it to the server on connection. More...

void	SetEchoTimeout (double timeoutInMilliseconds)
	Sets echo timeout in milliseconds. More...

void	SetEncryptionKeys (byte[] sid, byte[] key, byte[] iv, byte[] mackey)
	Sets up encryption and decryption of packets. More...

bool	IsConnected ()
	Returns true if the client is connected to the server. More...

void	Connect (string addr, int port, double timeout=1000)
	Attemps to connect to the server. Udp.OnConnect will be invoked if connection is successfully made. More...

void	ConnectDualMode (string addr, int port, double timeout=1000)
	Attemps to connect to the server using socket dual mode (explicit support for IPv6) turned on. Udp.OnConnect will be invoked if connection is successfully made. When connected to the server with this method, P2P is disabled. More...

void	Reset ()
	Remove all event listeners and triggers an even Udp.OnReset. This method MUST be called from the main thread ONLY. More...

void	CatchOnReconnect (Action< bool > action, uint ver, uint cmd)
	Registers a callback function to be triggered when the client is re-connected and a command response of ver and cmd is returned. Unlike other events, you must use this just before invoking a method that would trigger this event. This event is raised only once. You must call this again if you need this event again. More...

void	Reconnect (string addr, int port)
	IMPORTANT: This is internal use ONLY. Reconnects to the server. The server MUST be different from the one the client is currently connected to. More...

void	Disconnect ()
	Disconnects from the server the client is connected to and triggers Udp.OnDisconnect. OnDisconnect event will be raised when Disconnect is successful. More...

string	GetAddress ()
	Returns the client's external address as a string. This is shared with other client(s) for class for peer-to-peer communication. More...

List< string >	GetLocalAddress ()
	Returns a list of local address and port More...

void	RSend (uint ver, uint cmd, byte[] payload)
	Sends a packet as an RUDP (Reliable UDP) packet that is guaranteed its delivery to the server. More...

void	RSend (uint ver, uint cmd, byte[] payload, int payloadLength)
	Sends a packet as an RUDP (Reliable UDP) packet that is guaranteed its delivery to the server. More...

void	Send (uint ver, uint cmd, byte[] payload)
	Sends a packet as a plain UDP packet. The packet maybe lost. More...

void	Send (uint ver, uint cmd, byte[] payload, int payloadLength)
	Sends a packet as a plain UDP packet. The packet maybe lost. More...

void	Migrate ()
	Migrate to a new server node. Useful when handling OnOffline event. OnConnect event with reconnected = true will be raised More...

void	Migrate (string serverType)
	Migrate to a new server node. Useful when handling OnOffline event. The current server session and encryption keys will be securely carried over. OnConnect event with reconnected = true will be raised New server node is decided within the server type given. NOTE: This method does not require Auth from Diarkis HTTP server. More...

void	Echo ()
	Immediately sends an echo packet. Echo packets are sent as RUDP packets. More...

void	Ping ()
	Sends a ping packet. Ping packets are sent as UDP packets. Raises OnPing event. If the packet is lost, however, OnPing event will not be raised. More...

void	Update ()
	Must be called a certain interval from the main thread. For Unity application this must be called in Update. More...

void	SendTo (byte[] msg, IPEndPoint ip)
	Sends a UDP packet to a specified target IP end point More...

Public Member Functions inherited from Diarkis.Core
void	Dispose ()

Static Public Attributes
const uint	STATUS_OK = 1
	Command response status that indicates command execution on the server was successful. More...

const uint	STATUS_BAD = 4
	Command response status that indicates command execution on the server failed. The error indicates the cause of the failure is client inputs. More...

const uint	STATUS_ERR = 5
	Command response status that indicates command execution on the server failed. The error indicates the cause of the failure is the server. More...

const int	MAX_PACKET_SIZE = 1300
	Actual max size of a UDP packet is 65507 but we set the value to be lower. Typically a UDP packet that is beigger than 1400 bytes starts to split increasing the chance of packet loss. More...

const int	DISCONN_INIT = -1
	Disconnection reason enums. This is the initial reason state. More...

const int	DISCONN_EXPECTED = 0
	Disconnection reason enums. This indicates the disconnect was intentional and expected. More...

const int	DISCONN_NO_RESPONSE = 1
	Disconnection reason enums. Indicates that the disconnect was instructed by the server. The server has discarded the client connection state. This usually means that the client was not responsive to the server. More...

const int	DISCONN_RETRY_TIMEOUT = 2
	Disconnection reason enums. Indicates the RUDP retries have timedout. More...

const int	DISCONN_FORCED = 3
	Disconnection reason enums. This is not used internally. Reserved for forced disconnection. More...

Static Public Attributes inherited from Diarkis.Core
const int	CONN_TIMEOUT = -1
	Status of OnConnect event. This status indicates the connection has timedout. More...

const int	CONN_ERR = -2
	Status of OnConnect event. This status indicates the failure of opening a TCP socket. More...

const int	CONN_SUCCESS = 0
	Status of OnConnect event. This status indicates the connection has been successfully established. More...

Protected Member Functions
override void	Dispose (bool disposing)

Protected Member Functions inherited from Diarkis.Core
void	NewTCP (string addr, int port)

void	NewTCPDualMode (string addr, int port)

void	ConnectTCP (string addr, int port)

void	CloseTCP ()

NetworkStream	GetTCPStream ()

void	SetTCPNoDelay (bool noDelay)

bool	IsTCPConnected ()

int	GetTCPAvailable ()

void	ConnectUDP (string addr, int port)

void	ConnectUDPDualMode (string addr, int port)

void	CloseUDP ()

bool	IsUDPConnected ()

bool	UDPPolling (int pollingTime)

int	GetUDPAvailable ()

string	FindLocalAddress (IPAddress ip)

int	UDPRcvFrom (byte[] buff, ref EndPoint ep)

void	SendUDP (byte[] msg, int length)

void	SendUDPTo (byte[] msg, int length, IPEndPoint ip)

IPEndPoint	GetRemoteIP ()

EndPoint	GetConnetedUDPEndPoint ()

IPAddress	GetIPAddress_ (string addr, int port)

Protected Attributes
double	EchoGiveUpCount = ECHO_SEND_GIVEUP_COUNT
	The max echo failure allowed before disconnect. More...

Protected Attributes inherited from Diarkis.Core
bool	IsDualMode = false

Events
OfflineHandler	OnOffline
	The event raised when the connected server is ready to shutdown. The client is recommanded to either re-connect or disconnect. More...

PacketHandler	OnPacket
	The event raised when inbound packet is ready. This event is intended for internal use only. More...

ResponseHandler	OnResponse
	The event raised when a server response has been received. This event is raised for both reliable and unreliable (UDP and RUDP). More...

EchoHandler	OnEcho
	The event faised when a response of an echo has been received. The event passes the traveling time of an echo and the client's public address. The client public addess is used for P2P. NOTE: Echo is sent and received as RUDP. More...

PingHandler	OnPing
	The event raised by a response of a ping has been received. Ping behaves similar to echo, but it is handled as UDP. More...

PushHandler	OnPush
	The event raised when server push has been received. This event is raised for both reliable and unreliable (UDP and RUDP). More...

ConnectHandler	OnConnect
	The event raised when successful connection to the server is made by . The argument reconnecting indicates either re-connect or connect. More...

DisconnectHandler	OnDisconnect
	The event raised when disconnect from the server has been completed. More...

ExceptionHandler	OnException
	The event raised when a socket exception is caught. More...

ResetHandler	OnReset
	The event raised when is invoked to reset all event listeners. This event is meant for internal use. More...

AddressChangeHandler	OnAddressChange
	The event is raised when client public address has changed. More...

Additional Inherited Members
Static Public Member Functions inherited from Diarkis.Core
static string	GetVersion ()

Detailed Description

UDP client for Diarkis server that handles UDP messaging and RUDP messages. The class receives messages from the server via event callbacks.

UDP Packet Structure: Below is the break down of a UDP/RUDP packet data strcuture. Endianesss is Big Endian. Packet size over head:

Header and security data	66 byte
Encryption padding	0 ~ 15 byte
Payload size	N byte

UDP/RUDP Packet

SID	Mac Key	Original Packet Size	Padding	Encrypted Data
16 byte	32 byte	4 byte	0 ~ 15 byte	N byte

Encrypted Data

Symbol	Packet Size + Command Ver	Command ID	UPD Type	Payload
4 byte	4 byte	2 byte	4 byte	N byte

Constructor & Destructor Documentation

◆ Udp()

Diarkis.Udp.Udp	(	int	sendInterval = `200`,
		int	echoInterval = `5000`
	)

inline

Initializes an instance of .

Parameters

sendInterval	Interval in milliseconds to dictate packets being sent. Default is 200ms. all packets sent within this interval will be combined into one packet. Minimum interval allowed is 10ms. Setting it to 10ms or less will make UDP packets to be sent immediately.
echoInterval	Interval in milliseconds to send an echo packet. Default is 5000ms and if you change this value, you need to change server configuration called connectionTTL accordingly.

Member Function Documentation

◆ CatchOnReconnect()

void Diarkis.Udp.CatchOnReconnect	(	Action< bool >	action,
		uint	ver,
		uint	cmd
	)

inline

Registers a callback function to be triggered when the client is re-connected and a command response of ver and cmd is returned. Unlike other events, you must use this just before invoking a method that would trigger this event. This event is raised only once. You must call this again if you need this event again.

Parameters

action	Callback function.
ver	Command version of response to trigger the event
cmd	Command ID of response to trigger the event

◆ Connect()

void Diarkis.Udp.Connect	(	string	addr,
		int	port,
		double	timeout = `1000`
	)

inline

Attemps to connect to the server. Udp.OnConnect will be invoked if connection is successfully made.

Parameters

addr	UDP server address (hostname) to connect to.
port	UDP server port to connect to.
timeout	Connection timeout in milliseconds.

◆ ConnectDualMode()

void Diarkis.Udp.ConnectDualMode	(	string	addr,
		int	port,
		double	timeout = `1000`
	)

inline

Attemps to connect to the server using socket dual mode (explicit support for IPv6) turned on. Udp.OnConnect will be invoked if connection is successfully made. When connected to the server with this method, P2P is disabled.

Parameters

addr	UDP server address (hostname) to connect to.
port	UDP server port to connect to.

◆ Disconnect()

void Diarkis.Udp.Disconnect ( )

inline

Disconnects from the server the client is connected to and triggers Udp.OnDisconnect. OnDisconnect event will be raised when Disconnect is successful.

◆ Echo()

void Diarkis.Udp.Echo ( )

inline

Immediately sends an echo packet. Echo packets are sent as RUDP packets.

◆ EnableSendImmediate()

void Diarkis.Udp.EnableSendImmediate ( )

inline

Enables UDP messages to be sent immediately instead of being bufferred.

◆ GetAddress()

string Diarkis.Udp.GetAddress ( )

inline

Returns the client's external address as a string. This is shared with other client(s) for class for peer-to-peer communication.

◆ GetDisconnectionReason()

int Diarkis.Udp.GetDisconnectionReason ( )

inline

Returns the cause of disconnection as enum DISCONN_EXPECTED Disconnection was expected and there was no error DISCONN_NO_RESPONSE Could not get a response from the server DISCONN_RETRY_TIMEOUT RUDP retries took too long

◆ GetLocalAddress()

List<string> Diarkis.Udp.GetLocalAddress ( )

inline

Returns a list of local address and port

◆ GetServerEndPoint()

string Diarkis.Udp.GetServerEndPoint ( )

inline

Returns the server endpoint that the client is conencted to as a string.

◆ IsConnected()

bool Diarkis.Udp.IsConnected ( )

inline

Returns true if the client is connected to the server.

◆ Migrate() [1/2]

void Diarkis.Udp.Migrate ( )

inline

Migrate to a new server node. Useful when handling OnOffline event. OnConnect event with reconnected = true will be raised

◆ Migrate() [2/2]

void Diarkis.Udp.Migrate ( string serverType )

inline

Migrate to a new server node. Useful when handling OnOffline event. The current server session and encryption keys will be securely carried over. OnConnect event with reconnected = true will be raised New server node is decided within the server type given. NOTE: This method does not require Auth from Diarkis HTTP server.

◆ Ping()

void Diarkis.Udp.Ping ( )

inline

Sends a ping packet. Ping packets are sent as UDP packets. Raises OnPing event. If the packet is lost, however, OnPing event will not be raised.

◆ Reconnect()

void Diarkis.Udp.Reconnect	(	string	addr,
		int	port
	)

inline

IMPORTANT: This is internal use ONLY. Reconnects to the server. The server MUST be different from the one the client is currently connected to.

Parameters

addr	UDP server address (hostname) to connect to.
port	UDP server port to connect to.

◆ Reset()

void Diarkis.Udp.Reset ( )

inline

Remove all event listeners and triggers an even Udp.OnReset. This method MUST be called from the main thread ONLY.

◆ RSend() [1/2]

void Diarkis.Udp.RSend	(	uint	ver,
		uint	cmd,
		byte[]	payload
	)

inline

Sends a packet as an RUDP (Reliable UDP) packet that is guaranteed its delivery to the server.

Parameters

ver	Command version that is defined on the server.
cmd	Command ID that is defined on the server.
payload	Command payload.

◆ RSend() [2/2]

void Diarkis.Udp.RSend	(	uint	ver,
		uint	cmd,
		byte[]	payload,
		int	payloadLength
	)

inline

Sends a packet as an RUDP (Reliable UDP) packet that is guaranteed its delivery to the server.

Parameters

ver	Command version that is defined on the server.
cmd	Command ID that is defined on the server.
payload	Command payload.
payloadLength	Manually given command payload length.

◆ Send() [1/2]

void Diarkis.Udp.Send	(	uint	ver,
		uint	cmd,
		byte[]	payload
	)

inline

Sends a packet as a plain UDP packet. The packet maybe lost.

Parameters

ver	Command version that is defined on the server.
cmd	Command ID that is defined on the server.
payload	Command payload.

◆ Send() [2/2]

void Diarkis.Udp.Send	(	uint	ver,
		uint	cmd,
		byte[]	payload,
		int	payloadLength
	)

inline

Sends a packet as a plain UDP packet. The packet maybe lost.

Parameters

ver	Command version that is defined on the server.
cmd	Command ID that is defined on the server.
payload	Command payload.
payloadLength	Manually given command payload length.

◆ SendTo()

void Diarkis.Udp.SendTo	(	byte[]	msg,
		IPEndPoint	ip
	)

inline

Sends a UDP packet to a specified target IP end point

◆ SetClientKey()

void Diarkis.Udp.SetClientKey ( string clientKey )

inline

Sets up client key and send it to the server on connection.

Parameters

clientKey Client key to be sent to the server. Client key must match on the server or connection will be terminated.

◆ SetEchoTimeout()

void Diarkis.Udp.SetEchoTimeout ( double timeoutInMilliseconds )

inline

Sets echo timeout in milliseconds.

Parameters

timeoutInMilliseconds Echo timeout in milliseconds.

◆ SetEncryptionKeys()

void Diarkis.Udp.SetEncryptionKeys	(	byte[]	sid,
		byte[]	key,
		byte[]	iv,
		byte[]	mackey
	)

inline

Sets up encryption and decryption of packets.

Parameters

sid	Session ID that is valid until connection is disconnected.
key	Encryption key.
iv	Encryption initialization vector (IV).
mackey	Mac key used sign encrypted payload of a packet.

◆ Update()

void Diarkis.Udp.Update ( )

inline

Must be called a certain interval from the main thread. For Unity application this must be called in Update.

Member Data Documentation

◆ DISCONN_EXPECTED

const int Diarkis.Udp.DISCONN_EXPECTED = 0

static

Disconnection reason enums. This indicates the disconnect was intentional and expected.

◆ DISCONN_FORCED

const int Diarkis.Udp.DISCONN_FORCED = 3

static

Disconnection reason enums. This is not used internally. Reserved for forced disconnection.

◆ DISCONN_INIT

const int Diarkis.Udp.DISCONN_INIT = -1

static

Disconnection reason enums. This is the initial reason state.

◆ DISCONN_NO_RESPONSE

const int Diarkis.Udp.DISCONN_NO_RESPONSE = 1

static

Disconnection reason enums. Indicates that the disconnect was instructed by the server. The server has discarded the client connection state. This usually means that the client was not responsive to the server.

◆ DISCONN_RETRY_TIMEOUT

const int Diarkis.Udp.DISCONN_RETRY_TIMEOUT = 2

static

Disconnection reason enums. Indicates the RUDP retries have timedout.

◆ EchoGiveUpCount

double Diarkis.Udp.EchoGiveUpCount = ECHO_SEND_GIVEUP_COUNT

protected

The max echo failure allowed before disconnect.

◆ MAX_PACKET_SIZE

const int Diarkis.Udp.MAX_PACKET_SIZE = 1300

static

Actual max size of a UDP packet is 65507 but we set the value to be lower. Typically a UDP packet that is beigger than 1400 bytes starts to split increasing the chance of packet loss.

◆ STATUS_BAD

const uint Diarkis.Udp.STATUS_BAD = 4

static

Command response status that indicates command execution on the server failed. The error indicates the cause of the failure is client inputs.

◆ STATUS_ERR

const uint Diarkis.Udp.STATUS_ERR = 5

static

Command response status that indicates command execution on the server failed. The error indicates the cause of the failure is the server.

◆ STATUS_OK

const uint Diarkis.Udp.STATUS_OK = 1

static

Command response status that indicates command execution on the server was successful.

Event Documentation

◆ OnAddressChange

AddressChangeHandler Diarkis.Udp.OnAddressChange

The event is raised when client public address has changed.

◆ OnConnect

ConnectHandler Diarkis.Udp.OnConnect

The event raised when successful connection to the server is made by . The argument reconnecting indicates either re-connect or connect.

◆ OnDisconnect

DisconnectHandler Diarkis.Udp.OnDisconnect

The event raised when disconnect from the server has been completed.

◆ OnEcho

EchoHandler Diarkis.Udp.OnEcho

The event faised when a response of an echo has been received. The event passes the traveling time of an echo and the client's public address. The client public addess is used for P2P. NOTE: Echo is sent and received as RUDP.

◆ OnException

ExceptionHandler Diarkis.Udp.OnException

The event raised when a socket exception is caught.

◆ OnOffline

OfflineHandler Diarkis.Udp.OnOffline

The event raised when the connected server is ready to shutdown. The client is recommanded to either re-connect or disconnect.

◆ OnPacket

PacketHandler Diarkis.Udp.OnPacket

The event raised when inbound packet is ready. This event is intended for internal use only.

◆ OnPing

PingHandler Diarkis.Udp.OnPing

The event raised by a response of a ping has been received. Ping behaves similar to echo, but it is handled as UDP.

◆ OnPush

PushHandler Diarkis.Udp.OnPush

The event raised when server push has been received. This event is raised for both reliable and unreliable (UDP and RUDP).

◆ OnReset

ResetHandler Diarkis.Udp.OnReset

The event raised when is invoked to reset all event listeners. This event is meant for internal use.

◆ OnResponse

ResponseHandler Diarkis.Udp.OnResponse

The event raised when a server response has been received. This event is raised for both reliable and unreliable (UDP and RUDP).

The documentation for this class was generated from the following file:

client/cs/udp/Udp.cs

Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Events

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Udp()

Member Function Documentation

◆ CatchOnReconnect()

◆ Connect()

◆ ConnectDualMode()

◆ Disconnect()

◆ Echo()

◆ EnableSendImmediate()

◆ GetAddress()

◆ GetDisconnectionReason()

◆ GetLocalAddress()

◆ GetServerEndPoint()

◆ IsConnected()

◆ Migrate() [1/2]

◆ Migrate() [2/2]

◆ Ping()

◆ Reconnect()

◆ Reset()

◆ RSend() [1/2]

◆ RSend() [2/2]

◆ Send() [1/2]

◆ Send() [2/2]

◆ SendTo()

◆ SetClientKey()

◆ SetEchoTimeout()

◆ SetEncryptionKeys()

◆ Update()

Member Data Documentation

◆ DISCONN_EXPECTED

◆ DISCONN_FORCED

◆ DISCONN_INIT

◆ DISCONN_NO_RESPONSE

◆ DISCONN_RETRY_TIMEOUT

◆ EchoGiveUpCount

◆ MAX_PACKET_SIZE

◆ STATUS_BAD

◆ STATUS_ERR

◆ STATUS_OK

Event Documentation

◆ OnAddressChange

◆ OnConnect

◆ OnDisconnect

◆ OnEcho

◆ OnException

◆ OnOffline

◆ OnPacket

◆ OnPing

◆ OnPush

◆ OnReset

◆ OnResponse