void
rfm12_process(void)
{
uip_len = rfm12_rxfinish();
if (!uip_len)
return;
#ifdef ROUTER_SUPPORT
#ifdef RFM12_RAW_SUPPORT
if (rfm12_raw_conn->rport)
{
/* rfm12 raw capturing active, forward in udp/ip encapsulated form,
* thusly don't push to the stack. */
/* FIXME This way we cannot accept rfm12_raw requests from anything
* but ethernet. This shalt be improved somewhen. */
uip_stack_set_active(STACK_ENC);
memmove(uip_buf + UIP_IPUDPH_LEN + UIP_LLH_LEN, rfm12_data, uip_len);
uip_slen = uip_len;
uip_udp_conn = rfm12_raw_conn;
uip_process(UIP_UDP_SEND_CONN);
router_output();
uip_buf_unlock();
rfm12_rxstart();
return;
}
#endif /* RFM12_RAW_SUPPORT */
/* uip_input expects the number of bytes including the LLH. */
uip_len = uip_len + RFM12_BRIDGE_OFFSET + RFM12_LLH_LEN;
#endif /* not ROUTER_SUPPORT */
rfm12_rxstart();
router_input(STACK_RFM12);
if (uip_len == 0)
{
uip_buf_unlock();
return; /* The stack didn't generate any data
* that has to be sent back. */
}
/* Application has generated output, send it out. */
router_output();
}
void
usb_net_periodic(void)
{
if (usb_rq_len && (usb_rq_index >= usb_rq_len)) {
/* A packet arrived, put it into uip */
uip_len = usb_rq_len + UIP_LLH_LEN;
usb_rq_len = 0;
router_input (STACK_USB);
if (uip_len == 0)
uip_buf_unlock (); /* The stack didn't generate any data
that has to be sent back. */
else
router_output (); /* Application has generated output,
send it out. */
}
}
void
openvpn_handle_udp (void)
{
if (uip_udp_conn->lport != HTONS(OPENVPN_PORT))
return;
if (!uip_newdata ())
return;
/* Overwrite udp connection information (i.e. take from incoming packet). */
uip_ipaddr_copy(uip_udp_conn->ripaddr, BUF->srcipaddr);
uip_udp_conn->rport = BUF->srcport;
if (openvpn_hmac_verify ())
{
printf ("HMAC verification failed.\n");
return;
}
if (openvpn_decrypt_and_verify ())
{
printf ("decrypt/verify failed.\n");
return;
}
memmove (uip_buf + BASE_LLH_LEN,
uip_buf + OPENVPN_TOTAL_LLH_LEN,
uip_len - OPENVPN_HMAC_CRYPT_LEN);
/* ``uip_len'' is the number of payload bytes (including
hmac/encryption bits), however uip_process expects the number of
bytes including a LLH of 14 bytes. */
uip_len = uip_len + BASE_LLH_LEN - OPENVPN_HMAC_CRYPT_LEN;
printf ("received a correct packet of %d bytes.\n", uip_len - BASE_LLH_LEN);
/* Push data back into the router. */
router_input (STACK_OPENVPN);
if (! uip_len)
return; /* Inner stack hasn't created a
packet. */
openvpn_process_out ();
}
