No udp multicast receive with Kinetis SDK 2.1.0 and FRDM-K66F

[ReySinTrono]

Hello,

Any example over receive udp multicast with Kinetis SDK 2.1.0 and FRDM-K66F?

I can not make it work:

static void udpecho_thread(void *arg)
{
struct netconn *conn;
struct netbuf *buf;
char buffer[4096];
err_t err;
LWIP_UNUSED_ARG(arg);

#if LWIP_IPV6
conn = netconn_new(NETCONN_UDP_IPV6);
netconn_bind(conn, IP6_ADDR_ANY, 7);
#else /* LWIP_IPV6 */
conn = netconn_new(NETCONN_UDP);
netconn_bind(conn, IP_ADDR_ANY, 5000);
#endif /* LWIP_IPV6 */
LWIP_ERROR("udpecho: invalid conn", (conn != NULL), return;);

#if LWIP_IGMP /* Only for testing of multicast join*/
{
#include "lwip\netif.h"

ip4_addr_t multiaddr;
IP4_ADDR(&multiaddr, 224, 5, 6, 7);

err = netconn_join_leave_group(conn, &multiaddr, &netif_default->ip_addr, NETCONN_JOIN);
LWIP_ERROR("udpecho: join group is failed", (err == ERR_OK), return;);
}
#endif

while (1) {
err = netconn_recv(conn, &buf);
if (err == ERR_OK) {
/* no need netconn_connect here, since the netbuf contains the address */
if(netbuf_copy(buf, buffer, sizeof(buffer)) != buf->p->tot_len) {
LWIP_DEBUGF(LWIP_DBG_ON, ("netbuf_copy failed\n"));
} else {
buffer[buf->p->tot_len] = '\0';
err = netconn_send(conn, buf);
if(err != ERR_OK) {
LWIP_DEBUGF(LWIP_DBG_ON, ("netconn_send failed: %d\n", (int)err));
} else {
LWIP_DEBUGF(LWIP_DBG_ON, ("got %s\n", buffer));
}
}
netbuf_delete(buf);
}
}
}

Thanks.

[elisabeth_wilhe]

Hey Juande,

We are facing the same error but we don't have any idea what we screwed up on our setup. Could you quickly tell us what the problem was with your setup?

Thx in advance.

[ReySinTrono]

Sorry. The problem was my PC. This work.

Thanks.