bn.createUDPSocket

▸ createUDPSocket(): undefined | UDPSocket

description Create a UDP Socket Instance

remark supported jssdk >= 4.11.0

example

const udpSocket = bn.createUDPSocket()udpSocket.onMessage((res) => { console.log(res.message)})udpSocket.send({  address: '',  port: 1234,  message: 'hello'})

Returns

undefined | UDPSocket

Interface: UDPSocket

Name	Type	Description
bind	(port?): number	Bind a system randomly assigned available port or bind a specified port number
close	(): void	Stop UDP Socket Instance. After close, UDPSocket instance can not send messages, and UDPSocket.send will trigger an error event.
connect	(options): void	Preconnect to the specified IP and Port
send	(payload): void	send message to target IP and port
write	(payload): void	similar to send
setTTL	(ttl): void	set socket ttl
onClose	(callback): void	regisiter callback for socket close
offClose	(callback): void	unregisiter callback for socket close
onError	(callback): void	regisiter callback for errors
offError	(callback): void	unregisiter callback for errors
onListening	(callback): void	regisiter callback when listener rigistered
offListening	(callback): void	unregisiter callback when listener rigistered
onMessage	(callback): void	regisiter callback when receive messages
offMessage	(callback): void	unregisiter callback when receive messages

bind

▸ bind(port?): number

Bind a system randomly assigned available port or bind a specified port number

Parameters

Name	Type	Description
port?	number	Specifies the port number to bind, or returns the randomly available port number if not specified

Returns

number

Successfully bound port number

---

close

▸ close(): void

Stop UDP Socket Instance. After close, UDPSocket instance can not send messages, and UDPSocket.send will trigger an error event.

Returns

void

---

connect

▸ connect(options): void

Preconnect to the specified IP and Port

Parameters

Name	Type
options	ConnectOptions

Returns

void

---

send

▸ send(payload): void

send message to target IP and port

Parameters

Name	Type
payload	SendPaypoad

Returns

void

---

write

▸ write(payload): void

similar to send

Parameters

Name	Type
payload	SendPaypoad

Returns

void

---

setTTL

▸ setTTL(ttl): void

set socket ttl

Parameters

Name	Type	Description
ttl	number	ttl value, range [0, 255]

Returns

void

---

onClose

▸ onClose(callback): void

regisiter callback for socket close

Parameters

Name	Type
callback	() => void

Returns

void

---

offClose

▸ offClose(callback): void

unregisiter callback for socket close

Parameters

Name	Type
callback	() => void

Returns

void

---

onError

▸ onError(callback): void

regisiter callback for errors

Parameters

Name	Type
callback	ErrorCallback

Returns

void

---

offError

▸ offError(callback): void

unregisiter callback for errors

Parameters

Name	Type
callback	ErrorCallback

Returns

void

---

onListening

▸ onListening(callback): void

regisiter callback when listener rigistered

Parameters

Name	Type
callback	() => void

Returns

void

---

offListening

▸ offListening(callback): void

unregisiter callback when listener rigistered

Parameters

Name	Type
callback	() => void

Returns

void

---

onMessage

▸ onMessage(callback): void

regisiter callback when receive messages

Parameters

Name	Type
callback	MessageCallback

Returns

void

---

offMessage

▸ offMessage(callback): void

unregisiter callback when receive messages

Parameters

Name	Type
callback	MessageCallback

Returns

void

ConnectOptions

Ƭ ConnectOptions: Object

Type declaration

Name	Type	Description
address	string	target ip address
port	number	target port

---

SendPaypoad

Ƭ SendPaypoad: Object

Type declaration

Name	Type	Description
address	string	target ip address
port	number	target port
message	string | ArrayBuffer	message data
offset?	number	offset for arraybuffer, default 0
number?	number	message length for arraybuffer, default message.byteLength
setBroadcast?	boolean	broadcast the message, default false

---

ErrorCallback

Ƭ ErrorCallback: (res: { errMsg: string }) => void

Type declaration

▸ (res): void

Parameters

Name	Type
res	Object
res.errMsg	string

Returns

void

---

MessageCallback

Ƭ MessageCallback: (payload: MessageCallbackPayload) => void

Type declaration

▸ (payload): void

Parameters

Name	Type
payload	MessageCallbackPayload

Returns

void

---

MessageCallbackPayload

Ƭ MessageCallbackPayload: Object

Type declaration

Name	Type	Description
message	ArrayBuffer	message received
remoteInfo	{ address: string ; family: string ; port: number ; size: number }	remote address information
remoteInfo.address	string	remote socket address
remoteInfo.family	string	the protocol family IPv4 or IPv6
remoteInfo.port	number	port
remoteInfo.size	number	message byte size
localInfo	{ address: string ; family: string ; port: number }	local address information
localInfo.address	string	local socket address
localInfo.family	string	the protocol family IPv4 or IPv6
localInfo.port	number	port