tcp client in c

    /* fpont 12/99 */
    /* pont.net    */
    /* tcpClient.c */

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

    #define SERVER_PORT 1500
    #define MAX_MSG 100

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

      int sd, rc, i;
      struct sockaddr_in localAddr, servAddr;
      struct hostent *h;

      if(argc < 3) {
        printf("usage: %s <server> <data1> <data2> ... <dataN>\n",argv[0]);
        exit(1);
      }

      h = gethostbyname(argv[1]);
      if(h==NULL) {
        printf("%s: unknown host '%s'\n",argv[0],argv[1]);
        exit(1);
      }

      servAddr.sin_family = h->h_addrtype;
      memcpy((char *) &servAddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length);
      servAddr.sin_port = htons(SERVER_PORT);

      /* create socket */
      sd = socket(AF_INET, SOCK_STREAM, 0);
      if(sd<0) {
        perror("cannot open socket ");
        exit(1);
      }

      /* bind any port number */
      localAddr.sin_family = AF_INET;
      localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
      localAddr.sin_port = htons(0);

      rc = bind(sd, (struct sockaddr *) &localAddr, sizeof(localAddr));
      if(rc<0) {
        printf("%s: cannot bind port TCP %u\n",argv[0],SERVER_PORT);
        perror("error ");
        exit(1);
      }

      /* connect to server */
      rc = connect(sd, (struct sockaddr *) &servAddr, sizeof(servAddr));
      if(rc<0) {
        perror("cannot connect ");
        exit(1);
      }

      for(i=2;i<argc;i++) {

        rc = send(sd, argv[i], strlen(argv[i]) + 1, 0);

        if(rc<0) {
          perror("cannot send data ");
          close(sd);
          exit(1);

        }

        printf("%s: data%u sent (%s)\n",argv[0],i-1,argv[i]);

      }

    return 0;

    }