#include <stdio.h>

#define DATA "Half a league, half a league . . ."

/* 
 * This program creates a socket and initiates a connection with the socket 
 * given in the command line. One message is sent over the connection and 
 * then the socket is closed, ending the connection. The form of the command 
 * line is streamwrite hostname portnumber 
 */

main(argc, argv) 
     int argc; 
     char *argv[]; 
{ 
     int sock; 
     struct sockaddr_in server; 
     struct hostent *hp, *gethostbyname(); 
     char buf[1024];

     /* 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, &server, sizeof(server)) < 0) { 
           perror("connecting stream socket"); 
           exit(1); 
     } 
     if (write(sock, DATA, sizeof(DATA)) < 0) 
          perror("writing on stream socket"); 
     close(sock); 
}