/* tcpClient.c */

#include <string.h>

#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);



  /* 建立套接字 */

  sd = socket(AF_INET, SOCK_STREAM, 0);

  if(sd<0) {

    perror("cannot open socket ");

    exit(1);

  }



  /* 綁定端口號(hào) */

  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);

  }

				

  /* 連接到服務(wù)器 */

  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;

}