问一个比较傻逼的的问题，lwip客户端能直接通过ip连接吗

发布于 2013-04-19 11:55:24 浏览：2092 订阅该版

char *recv_data;
   struct hostent *host;
   int sock, bytes_received;
   struct sockaddr_in server_addr;

/* 閫氳繃鍑芥暟鍏ュ彛鍙傛暟url鑾峰緱host鍦板潃锛堝?鏋滄槸鍩熷悕锛屼細鍋氬煙鍚嶈В鏋愶級 */
  // host = gethostbyname(url);

/* 鍒嗛厤鐢ㄤ簬瀛樻斁鎺ユ敹鏁版嵁鐨勭紦鍐?*/
   recv_data = rt_malloc(BUFSZ);
   if (recv_data == RT_NULL) {
      rt_kprintf("No memory<br>");
      return;
   }

/* 鍒涘缓涓?涓猻ocket锛岀被鍨嬫槸SOCKET_STREAM锛孴CP绫诲瀷 */
   if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
      /* 鍒涘缓socket澶辫触 */
      rt_kprintf("Socket error<br>");

/* 閲婃斁鎺ユ敹缂撳啿 */
      rt_free(recv_data);
      return;
   }

/* 鍒濆?鍖栭?杩炴帴鐨勬湇鍔＄?鍦板潃 */
   server_addr.sin_family = AF_INET;
   server_addr.sin_port = htons(5000);
   server_addr.sin_addr.s_addr = INADDR_ANY;
   //server_addr.sin_addr.s_addr <<= 8;
   //server_addr.sin_addr.s_addr += 168;
   //server_addr.sin_addr.s_addr <<= 8;
   //server_addr.sin_addr.s_addr += 0;
   //server_addr.sin_addr.s_addr <<= 8;
   //server_addr.sin_addr.s_addr += 101;
   rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));

/* 杩炴帴鍒版湇鍔＄? */
   if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1) {
      /* 杩炴帴澶辫触 */
      rt_kprintf("Connect fail!<br>");
      lwip_close(sock);

/*閲婃斁鎺ユ敹缂撳啿 */
      rt_free(recv_data);
      return;
   }

while (1) {
      /* 浠巗ock杩炴帴涓?帴鏀舵渶澶?UFSZ - 1瀛楄妭鏁版嵁 */
      bytes_received = recv(sock, recv_data, BUFSZ - 1, 0);
      if (bytes_received <= 0) {
         /* 鎺ユ敹澶辫触锛屽叧闂?繖涓?繛鎺?*/
         lwip_close(sock);

/* 閲婃斁鎺ユ敹缂撳啿 */
         rt_free(recv_data);
         break;
      }

/* 鏈夋帴鏀跺埌鏁版嵁锛屾妸鏈??娓呴浂 */
      recv_data[bytes_received] = '\0';

if (strcmp(recv_data, "q") == 0 || strcmp(recv_data, "Q") == 0) {
         /* 濡傛灉鏄??瀛楁瘝鏄痲鎴朡锛屽叧闂?繖涓?繛鎺?*/
         lwip_close(sock);

/* 閲婃斁鎺ユ敹缂撳啿 */
         rt_free(recv_data);
         break;
      } else {
         /* 鍦ㄦ帶鍒剁粓绔?樉绀烘敹鍒扮殑鏁版嵁 */
         rt_kprintf("<br>Recieved data = %s ", recv_data);
      }

/* 鍙戦?佹暟鎹?埌sock杩炴帴 */
      send(sock, send_data, strlen(send_data), 0);
   }

return;

如上， 用的是客户端tcpclient的代码， 但是是不管怎么样就是连接失败，此外，刚调通tcpserv例程，证明网络连接是正确的 ，就是不知道怎么会连不上服务端（用的是网络调试助手， 经过路由器）