tcp simulation in c to be changed to fit omnet++ 4.0 software using c++ & java

[ranay]

hello,

This is a client and server program on c from some example code.I need help to change it to a
code which works on omnet++ 4.0 version software, which requires java and c++. i would be highly obliged if anyone could help me out with this as its very urgent for a project.
Many thanks for any suggestions,

Robin

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>


///   CLIENT   


int main(int argc, char *argv[])
{
	printf("This is the client program\n");

	int sockfd;
	int len, rc ;
	struct sockaddr_in address;
	int result;
	char ch = 'A';

   //Create socket for client.
	sockfd = socket(PF_INET, SOCK_STREAM, 0);
	if (sockfd == -1) { 
		perror("Socket create failed.\n") ; 
		return -1 ; 
	} 
	
	//Name the socket as agreed with server.
	address.sin_family = AF_INET;
	address.sin_addr.s_addr = inet_addr("127.0.0.1");
	address.sin_port = htons(7734);
	len = sizeof(address);

	result = connect(sockfd, (struct sockaddr *)&address, len);
	if(result == -1)
	{
		perror("Error has occurred");
		exit(-1);
	}

	while ( ch < 'Y') {

		//Read and write via sockfd
		rc = write(sockfd, &ch, 1);
		printf("write rc = %d\n", rc ) ; 
		if (rc == -1) break ; 
		
		read(sockfd, &ch, 1);
		printf("Char from server = %c\n", ch);
		//if (ch == 'A') sleep(5) ;  // pause 5 seconds 
	} 
	close(sockfd);

	exit(0);
}
SERVER 

Code:
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

///   SERVER   

int main(int argc, char *argv[])
{
	//Declaring process variables.
	int server_sockfd, client_sockfd;
	int server_len ; 
	int rc ; 
	unsigned client_len;
	struct sockaddr_in server_address;
	struct sockaddr_in client_address;

	//Remove any old socket and create an unnamed socket for the server.
	server_sockfd = socket(AF_INET, SOCK_STREAM, 0);
	server_address.sin_family = AF_INET;
	server_address.sin_addr.s_addr = htons(INADDR_ANY);
	server_address.sin_port = htons(7734) ; 
	server_len = sizeof(server_address);

	rc = bind(server_sockfd, (struct sockaddr *) &server_address, server_len);
	printf("RC from bind = %d\n", rc ) ; 
	
	//Create a connection queue and wait for clients
	rc = listen(server_sockfd, 5);
	printf("RC from listen = %d\n", rc ) ; 

	client_len = sizeof(client_address);
	client_sockfd = accept(server_sockfd, (struct sockaddr *) &client_address, &client_len);
	printf("after accept()... client_sockfd = %d\n", client_sockfd) ; 

	while(1)
	{
		char ch;
		printf("server waiting\n");

		//Accept a connection
		//client_len = sizeof(client_address);
		//client_sockfd = accept(server_sockfd, (struct sockaddr *) &client_address, &client_len);
		//printf("after accept()... client_sockfd = %d\n", client_sockfd) ; 
		//Read write to client on client_sockfd

		rc = read(client_sockfd, &ch, 1);
		printf("RC from read = %d\n", rc ) ; 		
		if (ch=='X') break ; 
		ch++;
		write(client_sockfd, &ch, 1);
	}

	printf("server exiting\n");

	//close(client_sockfd);
	close(client_sockfd);
	return 0;
}

[Shakti]

You mention 3 programming languages, c, c++ and java, neither of which is C# so why you put it here is beyond me.

Second your question is very vague, what exactly are you having trouble with? A good start would probably be to look around the documentation for the omnet++ library and look at various examples and so on.

[Salem]

In other words, it's a case of

"I found this code on the net, plz translate for me because I'm too busy/lazy - kthxbye"
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