server not able to send data

[pralu]

hi i ve made my server but that is not able to send data ... can any one help me ...althhough the code is error free n the code is in c socket using winsock... n m using visuall c++

[Banfa]

I'm guessing it's a logic error in the code somewhere.

Have you checked that your server is actually attached to a network?

[pralu]

ya i have checked it ut .... its attached ... m giving u the code kindly help me ut.....

/***************************************************************************/
/* This sample program provides a code for a connection oriented server.   */
/***************************************************************************/


/***************************************************************************/
/* Header files needed for the program.									   */
/***************************************************************************/
#include "structure.h"
#include <stdio.h>
#include <sys/types.h>
#include <Winsock2.h>
#include <Ws2tcpip.h>
#include <stdlib.h>
#include <string.h>		


/***************************************************************************/
/* Constants used by the program.										   */
/***************************************************************************/
#define SERVER_PORT		3005
#define FALSE			   0
#define EVENT_LOG_ENTRY  100 


void main()
{
	/***************************************************************/
	/* Variables and structure definations				           */
	/***************************************************************/
	int sd=-1,sd2=-1;
	int rc,on=1;
	fd_set read_fd;
	struct timeval timeout;
	struct sockaddr_in serveraddr;



	/****************************************************************/
	/* A do/while(False) loop is used to make error cleaner easier. */
	/* The close() of each of the socket descriptor is done at the  */
	/* end of the program.											*/
	/****************************************************************/
	do
	{

		/************************************************************/
		/*	call WSAStartup to startup the interface to WinSock.    */
		/************************************************************/
		WSADATA w;
		if (WSAStartup(0x0101, &w) != 0)
		{
			fprintf(stderr, "Could not open Windows socket connection.\n");
			exit(0);
		}

		/**************** WinSock has been initialized ******************/

		/****************************************************************/
		/* A socket() function returns the socket descriptor represent- */
		/* ing an endpoint.The statement also identifies the INET (In-  */
		/* ternet protocol) address family with the TCP transport (SOCK_*/
		/* STREAM) will be used for this socket.						*/
		/****************************************************************/
		sd = socket(PF_INET, SOCK_STREAM, 0);
		if(sd < 0)
		{
			perror("socket() failed");
			break;
		}


		/****************************************************************/
		/* The setsockopt() function is used to allow the local address */
		/* to be reused when the server is restarted before the required*/
		/* wait time expires.											*/
		/****************************************************************
		/*rc = setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, (char *)on, sizeof(on));
		if(rc < 0)
		{
			perror("setsockopt(SO_REUSEADDR) failed");
			break;
		}*/


		/****************************************************************/
		/* After the socket descriptor is created, a bind() gets a uniq-*/
		/* ue name for the socket. In this example the user sets the	*/
		/* s_addr to zero, which allows connections to be established	*/
		/* from any client that specifies port no 3005					*/
		/****************************************************************/
		memset(&serveraddr, 0 , sizeof(serveraddr));
		serveraddr.sin_family		=	PF_INET;
		serveraddr.sin_port			=	htons(SERVER_PORT);
		serveraddr.sin_addr.s_addr  =   INADDR_ANY;

		rc = bind(sd, (struct sockaddr*)&serveraddr, sizeof(serveraddr));
		if(rc < 0)
		{
			perror("bind() failed");
			break;
		}


		/****************************************************************/
		/*  The listen() allows the server to accept incoming client	*/
		/*	connections. In this the backlog is set to 10, this means	*/
		/*  that the system will queue 10 incoming connection requests	*/
		/****************************************************************/
		rc = listen(sd,10);
		if(rc < 0)
		{
			perror("listen() failed");
			break;
		}


		printf("ready for the client connect() \n");\

		/****************************************************************/
		/* Server uses the accept() to accept the incoming connection	*/
		/* request. the accept() call will block the indefinitely wait- */
		/* ing for incoming connections to arrive.						*/
		/****************************************************************/
		sd2 = accept(sd, NULL, NULL);
		if(sd2 < 0)
		{
			perror("accept() failed");
			break;
		}

		
		/****************************************************************/
		/* The select() allows the process to wait for an event to occur*/
		/* and wake up the process when the event occurs. In this the	*/
		/* system notifies the process only when it has data available	*/
		/* to read. The 30 seconds timeout is used on this select call  */ 
		/****************************************************************/
		timeout.tv_sec  = 30;
		timeout.tv_usec =  0;

		FD_ZERO(&read_fd);
		FD_SET(sd2, &read_fd);

		rc = select(sd2+1, &read_fd, NULL, NULL, &timeout);
		if(rc < 0)
		{
			perror("select() failed");
			break;
		}

		if(rc == 0)
		{
			perror("select() time out.");
			break;
		}



		/*****************************************************************/
		/*	Data entry that will be passed to the client				 */
		/*****************************************************************/

		EventLogEntryStruct EventLogEntry[EVENT_LOG_ENTRY];

		char buffer[20] = "";

		for(int i=0;i<10;i++) // this will reset after the max val is reached
		{
			
			strcpy(EventLogEntry[i].logName,"log-");
			strcpy(EventLogEntry[i].eventString,"event-");

			EventLogEntry[i].bufPos = i;
			EventLogEntry[i].logIdx = i+1;
			itoa (i,buffer,10);
			strcat(EventLogEntry[i].logName,buffer);
			EventLogEntry[i].dateTime = i+4;
			EventLogEntry[i].systemTick = i;
			EventLogEntry[i].resetCount = 1;
			EventLogEntry[i].inAir = 1;
			EventLogEntry[i].appSpec1 = i+2;
			EventLogEntry[i].appSpec2 = i+3;
			EventLogEntry[i].appSpec3 = i+1;
			EventLogEntry[i].timeStampLSW = 12;
			EventLogEntry[i].timeStampMSW = 24;
			EventLogEntry[i].timeStamp = 22;
			EventLogEntry[i].timeDelta = 12;
			EventLogEntry[i].windowID = i+2;
			strcat(EventLogEntry[i].eventString,buffer);
	
		
			/*******************************************************************/
			/* Echo the data back to the client								   */
			/*******************************************************************/
			rc = send(sd2, (char *)&EventLogEntry[i], sizeof(EventLogEntryStruct), 0);
			if(rc < 0)
			{
				printf("send() failed");
				break;
			}
		}
	

		
	/*******************************************************************/
	/* Program complete												   */
	/*******************************************************************/
	}while(false);


	/*******************************************************************/
	/* Close down any open socket									   */
	/*******************************************************************/
	if(sd != -1)
		closesocket(sd);
	if(sd2 != -1)
		closesocket(sd2);
}

[Banfa]

What error number do you get when you try to send?

[pralu]

select() time out on both server n client side which i ve handeled in...