Hi all
I´m stuck trying to recieve an UDP packet from a host
(192.168.10.10) to a LWIP on 192.168.10.11 and send it back to the host
as a simple echo.
I'm sending the UDP packet (a simple character or
string) trough port 31 from a C# Console I've programmed and checked
that it actually sends right.
This are the functions I'm using in the
NIOS II IDE enviroment:
-------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
void
udp_echo_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct
ip_addr *addr, u16_t port)
{
struct ip_addr adr;
IP4_ADDR(&adr, 192,
168, 10, 11);
udp_connect(pcb, &adr, 31);
//udp_send(pcb, p);
if (p
!= NULL) {
/* FIXME: possibly use udp_connect() and udp_disconnect()
instead of manipulating the pcb directly */
pcb->remote_ip = *addr;
pcb->remote_port = port;
udp_send(pcb, p);
/* FIXME: udp_disconnect()
? */
}
/* free the pbuf */
pbuf_free(p);
printf("udp_echo
OK!n");
}
void udp_echo_init(void)
{
struct ip_addr adr;
//
IP4_ADDR(&adr, 192, 168, 10, 10);
// udp_connect(pcb, &adr, 31);
//
udp_send(pcb, p);
udp_remove(pcb); //Elimino el pcb anterior (el de
transmision)
err_t retval;
struct udp_pcb * pcb;
pcb = udp_new();
if (pcb == NULL) printf("udp_new failed!n");
retval = udp_bind(pcb,
IP_ADDR_ANY, 31);
//retval = udp_bind(pcb, IP_ADDR_ANY, 31);
if
(retval != ERR_OK) printf("udp_bind failed!n");
IP4_ADDR(&adr, 192,
168, 10, 11);
udp_connect(pcb, &adr, 31);
//udp_bind(pcb, IP_ADDR_ANY,
31);
udp_recv(pcb, udp_echo_recv, NULL );
printf("udp_rcv OK!n");
//udp_disconnect(pcb);
}
-------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
and
I call udd_echo_init() from the main.c as an infinite listen
circle:
-------------------------------
while(1)
{
udp_echo_init();
}
-------------------------------
NIOS
II compiles and runs the program fine, the message "udp_recv OK" is
shown but "udp_echo OK" doesn't. I don't know but it seems that
udp_echo_recv() is not working.
Can anybody help me with this?
Thank
you
--
VíCTOR MATEO GóMEZ
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