[lwip-users] udp broadcast reseive with RAW api

[transistorman]

Hello,
I am trying to get my Atmel SAM E70 to receive broadcasts from my PC on
224.0.0.250. I am generating the udp packets on my PC with python and the
appear in Wireshark. I set up my code in udp_broadcast_rec_init() and I put
a breakpoint that never gets reached in the handler. What am I doing wrong? 

In igmp_joingroup_netif I stepped and found my board IP address in
netif->ip_adddr and I found my broadcast address in groupaddr.

Thanks,
Frank

void udp_broadcast_rec_init(void){

    struct udp_pcb *ptel_pcb;
    err_t status     ;
    ptel_pcb = udp_new();

    if (  (  status= udp_bind(ptel_pcb, IP_ADDR_ANY, 12345)) != ERR_OK) {
        while(1);
    }; 
     
    //static const ip_addr_t v4group = IPADDR4_INIT_BYTES(224,0,0,251);
    static const ip_addr_t v4group0 = IPADDR4_INIT_BYTES(224,0,0,250);
    if (MACB_if.ip_addr.addr==0){
        while(1);
    }
    if ((status = igmp_joingroup_netif(&MACB_if,  &v4group0)) != ERR_OK) {
                while(1);
    };
    /*register the callback*/
    udp_recv(ptel_pcb, udp_broadcast_rec_callback, NULL);
}



void udp_broadcast_rec_callback(void *arg, struct udp_pcb *pcb, struct pbuf
*p, struct ip_addr *addr, u16_t port){
    /*echo back the broadcast packet*/
    if (p != NULL) {
        udp_sendto(pcb, p, IP_ADDR_BROADCAST, 12344);  
        pbuf_free(p);
    }



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