[Savannah-help-public] [sr #106914] what's wrong with my lwip-raw api udp_send design?

[wudi]

URL:
  <http://savannah.gnu.org/support/?106914>

                 Summary: what's wrong with my lwip-raw api udp_send design?
                 Project: Savannah Administration
            Submitted by: the_gadfly
            Submitted on: Thu Jun 25 12:47:25 2009
                Category: None
                Priority: 5 - Normal
                Severity: 3 - Normal
                  Status: None
             Assigned to: None
        Originator Email: address@hidden
        Operating System: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Hi :
I am a new guy to lwip ,and when i use udp to my design .i hit a big
broblem.After seaching a long time,it is still here .
I cant receive any udp message at all ,i hope you could help me 
here is my code ,can you see some incorrect things?
thank you 
the_gadfly
---------------------------
#include "system.h"
#include "lwip/debug.h"
#include "lwip/stats.h"
#include "arch/init.h"
#include "lwip/ip_addr.h"
#include "lwip/tcpip.h"
#include "lwip/netif.h"
#include "netif/lan91c111if.h"
#include "lwip/udp.h"
#include 
#include "httpd.h"


#include "sys/alt_alarm.h"
#define get_milliseconds() alt_nticks()
int n;
/* ---------- IP oriented addresses for ethernet adapter ---------- */
#define IPADDR0 10
#define IPADDR1 1
#define IPADDR2 1
#define IPADDR3 51

#define NETMASK0 255
#define NETMASK1 255
#define NETMASK2 255
#define NETMASK3 0

#define GWADDR0 10
#define GWADDR1 1
#define GWADDR2 1
#define GWADDR3 2
void httpd_init(void)
{ char Test[]="hello world !";
  struct udp_pcb *pcb;
  struct ip_addr ipaddr;
  struct pbuf *p;
  err_t err;
  
  IP4_ADDR(&ipaddr,10,1,1,52);

  p = pbuf_alloc(PBUF_RAW,15,PBUF_RAM);
  p->payload=(void *)Test;
  p->len=p->tot_len=15;
  
  pcb = udp_new();
  err=udp_bind(pcb, IP_ADDR_ANY, 30);
  printf("err= %s",err);
  err=udp_connect(pcb,&ipaddr,30);
  printf("err= %s",err);
 
  err=udp_send(pcb,p);
  printf("err= %s",err);
  pbuf_free(p);
  udp_remove( pcb );
}

int main(void)
{
//0.6.4 struct netif *netif;
        struct netif netif;
        struct ip_addr ipaddr, netmask, gw;
        unsigned int now, lasttime;
        int i;
#if IP_REASSEMBLY
        int j;
#endif

   alt_avalon_lan91c111_if* dev_list_ptr = 
(alt_avalon_lan91c111_if*)alt_ethernet_device_list.next;

        printf("Example web server using Light-weight IP (LWIP)\n");
        printf("and simple RAM-based file system.\n\n");

/*
 * Initialize lwip
 */
        lwip_init();

        printf ("Setting IP address to: %d.%d.%d.%d\n", IPADDR0, IPADDR1, 
IPADDR2,
IPADDR3);
        printf ("Setting netmask to: %d.%d.%d.%d\n", NETMASK0, NETMASK1, 
NETMASK2,
NETMASK3);
        printf ("Setting gateway address to: %d.%d.%d.%d\n", GWADDR0, GWADDR1,
GWADDR2, GWADDR3);
        IP4_ADDR(&ipaddr, IPADDR0, IPADDR1, IPADDR2, IPADDR3);
        IP4_ADDR(&netmask, NETMASK0, NETMASK1, NETMASK2, NETMASK3);
        IP4_ADDR(&gw, GWADDR0, GWADDR1, GWADDR2, GWADDR3);

//0.6.4   netif = netif_add(&ipaddr, &netmask, &gw,
   netif_add(&netif, &ipaddr, &netmask, &gw,
                                          (void*)dev_list_ptr,
                                          lan91c111if_init, 
                                          ip_input);
//0.6.4 netif_set_default(&netif);
        netif_set_default(&netif);
        
/*
 * Initialize application(s)
 */
         httpd_init(); 
   //udp_echo_init(); 

  
 /* main loop to service the Ethernet device and expire TCP timers
 */
        lasttime = get_milliseconds();

        i=0;
#if IP_REASSEMBLY
        j=0;
#endif

        while(1)
        {
//0.6.4         lan91c111if_service(netif);
                lan91c111if_service(&netif);
                
                now = get_milliseconds();
                if (now - lasttime > TCP_TMR_INTERVAL) {
                        lasttime = now;
                        tcp_tmr();
                        if (++i==50) {
                                //etharp_tmr();
                                i=0;
                        }                               
                }

#if IP_REASSEMBLY
      if (++j==1000) {
        ip_reass_timer();
        j=0;
      }                         
#endif
                
        }
}
------------------------------------






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