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Old 03-17-2013, 01:47 PM   #1
Tygy
LQ Newbie
 
Registered: Mar 2013
Posts: 2

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Socket programming


Hi,

I have a question about socket programming.
I have two pieces of code, one for client and one for server. I have send a string from client side to the server, but server cannot get the string and I don't know what is the problem. Would anyone help me.

client code
Code:
char location_req_msg[1024]; 
	memset(location_req_msg, '0',sizeof(location_req_msg));
	char* str="Hello World to binder from client !";
	strcpy(location_req_msg,str );

	printf("The string in the buffer before client send is:%s\n",location_req_msg); // and it shows correct value
	//char location_response_msg[1024];
	size_t len = 0;
	printf("client_binder_sock %d \n" , client_binder_sock);
	// also shows correct value
	
	len = send(client_binder_sock, location_req_msg, strlen(str),0);
        // also shows the correct length here
server code
Code:
connection = accept(sock, (struct sockaddr*)&binder_address, &length);
if (connection < 0) {
	perror("accept");
	exit(EXIT_FAILURE);
}
	
while(connection)
{	
	n = recv(sock, readBuffer, 1024, 0);
	   if (n <= 0)
		printf("%d",errno);
	    else {
		printf("%s", "\nsuccess in client read!\n");

       
		std::cout << "\n bytes recieved :" << n << std::endl ;
		std::cout << readBuffer << std::endl;
		memset(readBuffer, '0',sizeof(readBuffer));
	}
	connection = accept(sock, (struct sockaddr*)&binder_address, &length);
}
client or server did not show any error.

Please help me why server shows length -1 and there is not any string in this side.
 
Old 03-17-2013, 07:35 PM   #2
kbp
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Registered: Aug 2009
Posts: 3,758

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Have you read Beej's Guide to Network Programming ? .. you should find that most of the problems you'll encounter are described in there.
 
1 members found this post helpful.
Old 03-17-2013, 08:12 PM   #3
sundialsvcs
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Registered: Feb 2004
Location: SE Tennessee, USA
Distribution: Gentoo, LFS
Posts: 5,283

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Tip: When you know that you're ing something that ten bezillion people have ed ahead of you ... such as basic socket programming ... use your head!

Get out there and "Google everything." Look for every tutorial you can think of, whether it's using exactly your target language or not.

Search this forum, too, for all the times when someone else has said ... for by learning from someone else's without blindly repeating it, you look .
 
Old 03-25-2013, 07:36 AM   #4
Tygy
LQ Newbie
 
Registered: Mar 2013
Posts: 2

Original Poster
Rep: Reputation: Disabled
Thanks.

We don't need to reply when we don't know it exactly.
I'm sorry I had a question here and got help from you anyway.
 
  


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