Solved

Simple Windows UDP Client Example

Posted on 2000-02-25
2
747 Views
Last Modified: 2013-12-03
Where can I find a really basic simple example of how to create a UDP client which can connect and send string data for Windows NT/95/98?
0
Comment
Question by:mr_walsh
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 5

Accepted Solution

by:
Wyn earned 50 total points
ID: 2560232
Here you can find alot...
http://www.sockaddr.com/ExampleSourceCode.html

Here a sample:
//This code connects to a UDP server //listening on port SERVER_PORT.
#include <stdio.h>
#include <winsock.h>
#include <string.h>
#include <stdlib.h>
#include<windows.h>

#define SERVERPORT 5555
#define CLIENTPORT 5554

int SockId=0;
static int iCount=0;


int InitialiseClient(void)
{
    int error;
SOCKADDR_IN SockData;
SOCKADDR_IN SockSock;
    int sockid;
    WORD wVersionRequested;
WSADATA wsaData;
    wVersionRequested = MAKEWORD( 2, 0 );
    error = WSAStartup( wVersionRequested, &wsaData );
   if ( error != 0 ) {exit(0);}

SockData.sin_family = AF_INET;
SockData.sin_port = htons( CLIENTPORT );
    SockData.sin_addr.s_addr=htonl(INADDR_ANY);

sockid = socket ( AF_INET , SOCK_DGRAM ,0);

if ( sockid == -1 )
{
    printf ( "\n Socket Failed %d\n",WSAGetLastError() );
exit ( 1 );
}
error = bind ( sockid , (struct sockaddr *)&SockData , (int ) sizeof ( SockData ) );
if ( error )
{
    printf ( "\n  Bind Failed %d \n" ,WSAGetLastError());
closesocket( sockid );
    exit(1);
}

SockSock.sin_family = AF_INET;
/*Connect to server at IP:192.168.174.32 on port SERVER_PORT*/
SockSock.sin_port = htons(SERVER_PORT );
    SockSock.sin_addr.s_addr=inet_addr("192.168.174.32");

int iState=connect ( sockid,(sockaddr FAR*)&SockSock,sizeof(SockSock));    
printf("State of connection =%d ",iState);fflush(stdout);
return sockid;
}



void main(void )
{
    char command[256];
    char header[2],result[256];
int iCount=1;
SockId=InitialiseClient();

    header[0]=1;
command[0]=iCount;
header[1]=(char)1;
header[2]=0;

    strcpy(&command[1],"KILL PROCESS");

if(send(SockId,header,1,0)!=1)
{
printf("Serious Problem header");
}
printf(" Problem header=%s data=%d",header,strlen(header));


int Data=recv(SockId,result,1,0);

if(Data!=1)
{
    printf("Recv :Len=%d LineLen=%d Error=%d",Data,2,WSAGetLastError());
    exit(1);
}

Regards
W.Yinan

0
 

Author Comment

by:mr_walsh
ID: 2571405
Thanks for the quick, concise answer.  --matt
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After several hours of googling I could not gather any information on this topic. There are several ways of controlling the USB port connected to any storage device. The best example of that is by changing the registry value of "HKEY_LOCAL_MACHINE\S…
For most people, the WrapPanel seems like a magic when they switch from WinForms to WPF. Most of us will think that the code that is used to write a control like that would be difficult. However, most of the work is done by the WPF engine, and the W…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…

687 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question