Send UDP sockets with rtems with a M5234BCC

[Joel Sherrill]

There may be other problems but the TCP/IP stack runs
as a set of tasks.  I do not see how the TCP/IP stack gets
to run at all in this example.  The Init task is highest
priority and not preemptible.  When the clientWorker()
does the open/write/close, it returns to Init() which falls
off the bottom of its task body.  This by definition is a fatal
error in the Classic API.

The driver itself may or may not work, but I am pretty sure
in the best of cases, in this example the driver task never
runs to try push the data out.

--joel

Diego Sanz wrote:
> Hello
>  
> I am trying to send packets throw UDP sockets, on the board M5234BCC 
> whose microcontroller is mcf 5234 (coldfire), with RTEMS
> The Examples that comes with RTEMS works perfectly, including the 
> loopback exaqmple.
>
> Well The next code is the application that I am trying to make but 
> doesn't send anything throw the cable ( I see with the commview program).
>
> Could someone help me and tell me if is there some error?  Thanks!
>
> The code:
>
> /*
>  *  $Id: init.c,v 1.6 2007/04/05 15:22:58 joel Exp $
>  */
>
> #include <bsp.h>
>
> #define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
> #define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
> #define CONFIGURE_RTEMS_INIT_TASKS_TABLE
>
> #define CONFIGURE_EXECUTIVE_RAM_SIZE        (512*1024)
> #define CONFIGURE_MAXIMUM_SEMAPHORES        20
> #define CONFIGURE_MAXIMUM_MESSAGE_QUEUES    20
> #define CONFIGURE_MAXIMUM_TASKS            20
>
> #define CONFIGURE_MICROSECONDS_PER_TICK    10000
> #define CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS 50
> #define CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM
>
> #define CONFIGURE_INIT_TASK_STACK_SIZE    (10*1024)
> #define CONFIGURE_INIT_TASK_PRIORITY    50
> #define CONFIGURE_INIT_TASK_INITIAL_MODES (RTEMS_PREEMPT | \
>                                            RTEMS_NO_TIMESLICE | \
>                                            RTEMS_NO_ASR | \
>                                            RTEMS_INTERRUPT_LEVEL(0))
>
> #define CONFIGURE_INIT
> rtems_task Init(rtems_task_argument argument);
>
> #include <rtems/confdefs.h>
>
> #include <rtems/rtems_bsdnet.h>
> #include <rtems/error.h>
> #include <stdio.h>
> #include <stdarg.h>
> #include <stdlib.h>
> #include <string.h>
> #include <errno.h>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <net/if.h>
> #include <sys/ioctl.h>
> #include <sys/sockio.h>
>
> /*
>  * Network configuration
>  */
> //extern void rtems_bsdnet_loopattach();
> static struct rtems_bsdnet_ifconfig netdriver_config = {
>     //"lo0",                          /* name */
>    // (int (*)(struct rtems_bsdnet_ifconfig *, 
> int))rtems_bsdnet_loopattach, /* attach function */
>      RTEMS_BSP_NETWORK_DRIVER_NAME,
>      RTEMS_BSP_NETWORK_DRIVER_ATTACH,     
>      NULL,                           /* link to next interface */
>     "138.100.48.254",                    /* IP address */
>     "255.225.225.128",                    /* IP net mask */
>      NULL,
>      0,
> };
>
> struct rtems_bsdnet_config rtems_bsdnet_config = {
>     &netdriver_config,       /* Network interface */
>     NULL,                   /* Use fixed network configuration */
>     0,                      /* Default network task priority */
>     0,                      /* Default mbuf capacity */
>     0,                      /* Default mbuf cluster capacity */
>     "testSystem",           /* Host name */
>     "nowhere.com <http://nowhere.com>",          /* Domain name */
>     "138.100.48.129",            /* Gateway */
>     "138.100.48.253",            /* Log host */
>     {"127.0.0.1" },         /* Name server(s) */
>     {"127.0.0.1" },         /* NTP server(s) */
> };
>
> /*
>  * Thread-safe output routines
>  */
> static rtems_id printMutex;
> static void printSafe(const char *fmt, ...)
> {
>     va_list args;
>     va_start(args, fmt);
>     rtems_semaphore_obtain(printMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
>     vprintf(fmt, args);
>     rtems_semaphore_release(printMutex);
>     va_end(args);
> }
> #define printf printSafe
>
>
>
>
> /*
>  * The real part of the client
>  */
> static rtems_task clientWorker(int arg)
> {
>    
>      int s;
>         struct sockaddr_in myAddr, farAddr,buffer;
>         struct sockaddr hola;
>         char cbuf[]={"HOLA DIEGO TE HABLA 5235"};
>         int i;
>         int f, flags;
>         struct ifreq *device;   
>      struct ifconf data;
>          unsigned long int broadaddr=0;
>          data.ifc_len=sizeof(device);   
>      memset(data.ifc_buf,0,data.ifc_len);
>          
>      flags = IFF_UP|IFF_RUNNING;
>        
>       s=socket(AF_INET,SOCK_DGRAM,0);
>     if (s < 0)
>     {
>         printf("Can't create client socket: %s\n", strerror(errno));
>             return;
>     }
> //SIOCSIFBRDADDR
>         printf("\nENTRA EN LA TAREA CLIENT WORKER\n");
>     //rtems_bsdnet_ifconfig(RTEMS_BSP_NETWORK_DRIVER_NAME, 
> SIOCGIFDSTADDR, &device);   
>    
>        
>      //buffer=(struct sockaddr_in)device->ifr_ifru.ifru_broadaddr;
>    
>    
>
>      
>     broadaddr=(device->ifr_ifru.ifru_addr.sa_data[0])<<24;
>      broadaddr|=(device->ifr_ifru.ifru_addr.sa_data[1])<<16;
>      broadaddr|=(device->ifr_ifru.ifru_addr.sa_data[2])<<8;
>      broadaddr|=(device->ifr_ifru.ifru_addr.sa_data[3]);
>    
>         /*
>     printf("\name:%s",device->ifr_name);
>         printf("\n direccion de broadcast=%u  \n",broadaddr);
>         */
>
>     memset(&myAddr, 0, sizeof myAddr);
>     myAddr.sin_family = AF_INET;
> //    myAddr.sin_port = htons(10100);
>     myAddr.sin_port = 10100;
>     myAddr.sin_addr.s_addr = inet_addr("138.100.48.254");
>    
>     if (bind(s, (struct sockaddr *)&myAddr, sizeof myAddr) < 0)
>     {
>         printf("Can't bind socket: %s\n", strerror(errno));
>             goto close;
>        }
>         memset(&farAddr, 0, sizeof farAddr);
>     farAddr.sin_family = AF_INET;
> //    farAddr.sin_port=htons(10001);
>     farAddr.sin_port=10001;
>     farAddr.sin_addr.s_addr = inet_addr("138.100.48.253");
> /***************************************************************/
>     rtems_bsdnet_show_inet_routes ();
> //     rtems_bsdnet_show_mbuf_stats ();
> //    rtems_bsdnet_show_if_stats ();
> //    rtems_bsdnet_show_ip_stats ();
> //    rtems_bsdnet_show_udp_stats ();
>    
>    
>     printf("\n sending to host\n ");
>     i=sendto(s,&cbuf,25,0,(struct sockaddr*)&farAddr,sizeof(struct 
> sockaddr));
>    
>     if (i>0)
>     {
>         printf("Enviado correctamente\n %d",i);
>        
>     }
>     else
>     {
>         printf("Enviado Incorrectamente\n");
>     }
>   close:
>     printf("Client closing connection.\n");
>     if (close(s) < 0)
>     {
>                 printf("Can't close client task socket: %s\n", 
> strerror(errno));
>     }
> }
>
>
>
>
> rtems_task
> Init (rtems_task_argument ignored)
> {
>     int net_state=0;
>    
>    
>
>      printf("\"Network\" initializing! HI DIEGO\n");
>     net_state=rtems_bsdnet_initialize_network();
>     printf("\"Network\" initialized! %d\n",net_state);
>
>     printf("Try running client with no server present.\n");
>     printf("Should fail with `connection refused'.\n");
>     clientWorker(0);
>
> }
>