Prosoft-technology MVI69-ADMNET Manual de usuario descargar pdf (Pagina 107)

MVI-ADMNET ♦ 'C' Programmable WATTCP API Functions

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

ProSoft Technology, Inc. Page 107 of 122

February 20, 2013

tcp_listen

Syntax

int tcp_listen( tcp_Socket *sk, word lPort, longword ina, word port,

dataHandler_t datahandler, word timeout );

Parameters

Pointer to the socket that has been initialized.

lPort

Local port number.

datahandler

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

ina

Host IP Address.

port

Host port number.

timeout

Value used to set the period of time to wait for data. 0 is set to indicate no

timeout.

Description

This function is used for listening to an incoming message. port is an option

parameter. Most of the time, port 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 a longword-formatted

variable. 0 can be passed as an ina value if there is no specific IP Address to

listen too.

Example

tcp_Socket *socket;

int port = 5656;

. . .

tcp_listen(socket, port, 0L, 0, NULL, 0);

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Prosoft-technology MVI69-ADMNET Manual de usuario Pagina 107