/* Stream client, by Tom Sykora */

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

 /*This program  creates a socket and initiates  a connection
  *   *with  the socket given in the  command line. */

int main(int argc, char *argv[])

{  
   int sock;
   int i=0;  /* loop counter*/
   char tick[3],tick1[3];  /*ticker symbol*/
   struct  sockaddr_in server;
   struct hostent *hp;   
   char buf[1024];
   char line[50];
   char *tempstr;
   int rval; /*error code for read of data*/

   /* Create socket  */
   
   sock = socket(AF_INET,  SOCK_STREAM, 0);
   if (sock <  0)
     {
	perror("opening stream  socket");
	exit(1);
     }

   /* Connect socket  using name specified by  command line. */
   
   server.sin_family = AF_INET;
   hp = gethostbyname(argv[1]);
   
   if (hp ==  0)
     {
	fprintf(stderr, "%s:  unknown host0", argv[1]);     
	exit(2);
     }
   
   bcopy(hp->h_addr, &server.sin_addr, hp->h_length);
   server.sin_port = htons(atoi(argv[2]));
   
   if (connect(sock, (struct sockaddr*)&server,  sizeof(server)) < 0)
     {
	perror("connecting stream  socket");
	exit(1);
     }

   /*request stock quote for a certain ticker symbol(1to5)*/
   
   printf("Enter upto five ticker symbols separated by blanks\n");
   gets(line);
   if (strlen(line)>2)
     {
	strcpy(tick,strtok(line," "));
	if (write(sock, tick,  sizeof(tick)) < 0)
	  perror("writing on  stream socket"); 
	bzero(buf, sizeof(buf)); /*set buffer to zero*/
	if ((rval = read(sock,buf,sizeof(buf))) < 0) /*accept data from server*/
	  perror("reading stream message");
	if (rval == 0) /*no more data to receive*/
	  printf("Ending connection\n"); 
	else  /*print the data received*/
	  printf("\n%s\n", buf);
	
	while (((tempstr = strtok(NULL, " ")) != NULL) && i<=3)
	  {
	     strcpy(tick1,tempstr);
	     if (write(sock, tick1,  sizeof(tick1)) < 0)
	       perror("writing on  stream socket"); 
	     i++; /*increment loop counter to ensure no more than five symbols*/
	     
	     bzero(buf, sizeof(buf)); /*set buffer to zero*/
	     if ((rval = read(sock,buf,sizeof(buf))) < 0) /*accept data from server*/
	       perror("reading stream message");
	   if (rval == 0) /*no more data to receive*/
	       printf("Ending connection\n"); 
	     else  /*print the data received*/
	       printf("\n%s\n", buf);
	  }
     }
   
   close(sock); /*close connection*/
return 0;
}