Function udpecho_entry

examples/test/net_test.c:24–71

#define UDP_ECHO_PORT   7
rt_thread_t udpecho_tid = RT_NULL;
void udpecho_entry(void *parameter)
{
    struct netconn *conn;
    struct netbuf *buf;
    struct ip_addr *addr;
    unsigned short port;

    conn = netconn_new(NETCONN_UDP);
    if(conn == NULL)
    {
        rt_kprintf("no memory error\n");
        return;
    }
    netconn_bind(conn, IP_ADDR_ANY, 7);

    while(1)
    {
        /* received data to buffer */
#if LWIP_VERSION_MINOR==3U
        buf = netconn_recv(conn);
#else
        netconn_recv(conn, &buf);
#endif
        if(buf == NULL)
        {
            break;
        }
        addr = netbuf_fromaddr(buf);
        port = netbuf_fromport(buf);

        /* send the data to buffer */
        netconn_connect(conn, addr, port);

        /* reset address, and send to client */
#if LWIP_VERSION_MINOR==3U
        buf->addr = RT_NULL;
#else
        buf->addr = *IP_ADDR_ANY;
#endif

        netconn_send(conn, buf);

        /* release buffer */
        netbuf_delete(buf);
    }

    netconn_delete(conn);
}
/*
 * UDP socket echo server
 */