Re: [lwip-users] Raw-api UDP example :Can not receive UDP-messages

[the_gadfly]

The code below are Ethereal's display.
.
.
2930 3.778501 Altera_ff:48:08 ff:ff:ff:ff:ff:ff ARP Who has 10.1.1.52? Tell
10.1.1.51
2931 3.778536 Altera_ff:48:08 ff:ff:ff:ff:ff:ff ARP Who has 10.1.1.52? Tell
10.1.1.51

.
.
.
2935 3.790042 WUDI            Altera_ff:48:08   ARP 10.1.1.52 is at
00:0c:76:8a:93:e6
.
.
.
 you could see that the pc answered the board's ARP,but it did nothing
cheers
the_gadfly

the_gadfly wrote:
> 
> 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  can't receive any
> udp message at all,though there are ARPs between PC and  NIOS .here is my
> code ,Could anyone tell me what's wrong?
> 
> I am going crazy overhere.... 
> cheers
> the_gadfly
> -------------------------------------------------
> 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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