#include <stdio.h>  /* for NULL */
#include <errno.h>  /* for perror() */
#include <ctype.h>  /* for atoi() */

#include <sys/types.h>  /* for pid_t, socket.h */
#include <sys/socket.h> /* for AF_INET, etc. */
#include <netinet/in.h> /* for struct sockaddr_in */

/* Use the values you got from your client here */
#define RESPONSE  "gtXXXXx_X_X_XXXXXXX wankle rotary engine"




/* Pick a port number for yourself.  It should be higher than 2000 or so.
 * For example, use the last 4 digits of your SSN or your GT number .
 * You should not exceed 65535, but higher is better.
 * Change HOST_NAME to be the name of the computer you're running
 * your server from, too (must be acmex, acmey, or acmez).
 */
#define HOST_NAME	"MYHOST.gatech.edu"
#define PORT_NUMBER 	XXXX 



/* exit and print system error code */
static void
die(char *s)
{
    perror(s);
    exit(2);
}

static 
int main(void)
{
    char sendbuf[BUFSIZ];
    char recvbuf[BUFSIZ];
    int listenSock, connectSock;
    struct sockaddr_in listenAddr;
    struct sockaddr_in connectAddr;
    int listenSize, connectSize, clientlen;
    int recvlen;
    

    
    listenSize = sizeof(listenAddr);
    connectSize = sizeof(connectAddr);

    memset((char *)&connectAddr,0,connectSize);  /*init to 0 */
    /* CREATE THE SOCKET */
/* your code here, Hint, use 'socket' */

    /* NAME THE SOCKET */
    /* This part is done for you */
    listenAddr.sin_addr.s_addr = 0;
    listenAddr.sin_family = AF_INET;
    listenAddr.sin_port = htons(PORT_NUMBER);
    
    
    /* BIND THE SOCKET */
/* your code here, Hint, use 'bind' */    

    
    /* ENABLE LISTENING ON SOCKET */
/* your code here. Hint, use 'listen' */

    /* MAIN LOOP -- This loop also more than one connection to be
     * to your server before it terminates.  It's not needed for
     * this assignment, but allows you to debug without having to
     * restart the server every time.
     */
     for( ; ; )
	{ 
           /* clear out buffers initially */	   
	    memset((char *)&recvbuf,0,BUFSIZE);
	    memset((char *)&sendbuf,0,BUFSIZE);

	/* accept the new connection */
/* your code here.  Hint, use 'accept' */

	/* Create the greeting message in sendbuf */
/* your code here.  Hint, use 'sprintf' */
/* Greeting format: <Your GT number> <SUT's hostname> <SUT's portnum>\r\n */

	/* print the greeting locally */
/* your code here. ie: "Received: text" */

	/* send a greeting message to the client */
/* your code here.  Hint, use 'send' */

	/* read input from client */
/* your code here.  Hint, use 'recv' */
	
	/* print out message from client */    
/* your code here. ie: "Received: text" */

	/* confirm the client message */
/* your code here */
/* Client greeting message will be: "CS2430 Server\r\n" */

	/* Authenticate yourself */
/* your code here.  Hint, use 'auth' */

	/* read input from client */
/* your code here.  Hint, use 'recv' */
	
	/* print out message from client */    
/* your code here. ie: "Received: text" */

	/* confirm the client message */
/* your code here */
/* Client greeting message will be: "getresponse\r\n" */

	/* Create the answer message in sendbuf */
/* your code here.  Hint, use 'sprintf' */
/* Answer format: <your key> <your answer>\r\n */


	/* print out your response */
/* your code here. */

	/* send encoded message back to client */
/* your code here. Hint, use 'send' */
	   
	/* close the socket */
/* your code here. */ 

	}
    exit(0);
}