基于Linux的socket编程模板(4)

        { 
            printf("successfully send bytes %d\n",SERVER_PACK_LEN); 
            break; 
        } 
        else if( sendBytes <= 0 && errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN) 
        { 
            printf("disconnected or other errors!\n"); 
              return -1; 
        } 
        else
        { 
            continue; 
        } 
    } 
 
    // recv process result from server 
    while(1) 
    { 
        recvBytes = recv(g_hSocket,(uint8_t *)&rPack,RETURN_PACK_LEN,0); 
 
          if( recvBytes == RETURN_PACK_LEN ) 
          { 
              break; 
          } 
          else if( recvBytes <=0 && errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN ) 
          { 
              printf("disconnected or error occur!\n close the socket!\n"); 
              return -1; 
          } 
          else
          {  
              continue; 
          } 
    } 
 
    // check header 
    if ( memcmp( rPack.cmdHeader, TCP_CMD_HEADER_STR, TCP_CMD_HEADER_LEN ) != 0 ) 
    { 
        printf("return pack header errror!\n"); 
        return -2;