Re: [lwip-users] lwip netconn_recv issue

[Martin Velek]

Hello,

you are using at least 4096 of stack (actually much more because
netconn_* needs also some). Probably the death is caused by the stack
overflow, check how many bytes did you allocated for the task. I do
not know how to detect it in the µC/OS.

Best
Martin

On Thu, May 2, 2013 at 4:38 AM, hongyancl <address@hidden> wrote:
> hello,
> I want to creat one task in ucos with lwip.
> Following the code :
>
> static void
> udpecho_thread(void *arg)
> {
>         static struct netconn *conn;
>         static struct netbuf *buf;
>         static ip_addr_t *addr;
>         static unsigned short port;
>         char buffer[4096];
>         err_t err;
>         LWIP_UNUSED_ARG(arg);
>
>         conn = netconn_new(NETCONN_UDP);
>         LWIP_ASSERT("con != NULL", conn != NULL);
>         netconn_bind(conn, NULL, 7);
>
>         while (1)
>         {
>                 err = netconn_recv(conn, &buf);
>
>                 if (err == ERR_OK)
>                 {
>                         addr = netbuf_fromaddr(buf);
>                         port = netbuf_fromport(buf);
>                         netconn_connect(conn, addr, port);
>                         netbuf_copy(buf, buffer, buf->p->tot_len);
>                         buffer[buf->p->tot_len] = '\0';
>                         netconn_send(conn, buf);
>                         LWIP_DEBUGF(LWIP_DBG_ON, ("got %s\n", buffer));
>                         netbuf_delete(buf);
>                 }
>         }
> }
>
> but,after i creat the task ,my system is dead.
>
> please give me some asvice.
>
>
>
> --
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>
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