Prosoft-technology MVI69-ADMNET Manuale Utente Scaricare il pdf (Pagina 82)

WATTCP API Functions MVI-ADMNET ♦ 'C' Programmable

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

Page 82 of 122 ProSoft Technology, Inc.

February 20, 2013

tcp_open

Syntax

int tcp_open( tcp_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 TCP 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 used to convert an IP

address into longword-formatted variable.

Return Value

Connection cannot be made

Connection is made

Example

tcp_Socket *socket;

. . .

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

{

printf("Open Successfully\n");

}

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Prosoft-technology MVI69-ADMNET Manuale Utente Pagina 82