Prosoft-technology MVI69-ADMNET Instrukcja Użytkownika Pobierz pdf (Strona 84)

WATTCP API Functions MVI-ADMNET ♦ 'C' Programmable

Developer's Guide 'C' Programmable Application Development Module with Ethernet

Page 84 of 122 ProSoft Technology, Inc.

February 20, 2013

udp_open

Syntax

int udp_open( udp_Socket *sk, word lPort, longword ina, word port,

dataHandler_t datahandler );

Parameters

Pointer to the socket that has been initialized.

lPort

Local port number.

ina

Host IP Address.

port

Host port number.

datahandler

Data Handler. Not used in this version. Use NULL for this parameter.

Description

This function opens a UDP socket connection to a host machine using

parameters passed to it. IPort is an option parameter. Most of the time, IPort can

be set to 0. The API will find an available port number for the socket. ina is a host

IP address passed as a longword. Function resolve can be use to convert an IP

address into a longword-formatted variable.

Return Value

Connection cannot be made

Connection is made

Example

udp_Socket *socket;

. . .

if(udp_open(socket, 0, resolve("192.168.0.1"), 5656, NULL))

{

printf("Open Successfully\n");

}

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Prosoft-technology MVI69-ADMNET Instrukcja Użytkownika Strona 84