81 lines
2 KiB
C
81 lines
2 KiB
C
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#include <stdio.h>
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#include "contiki.h"
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#include "net/uip.h"
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#include "net/uip-fw.h"
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#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
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#include "dev/leds.h"
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#include "dev/cc2420.h"
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#include "net/uaodv.h"
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#include "net/uaodv-rt.h"
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#define in_my_network(a) \
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(((a[0] ^ cc2420if.ipaddr[0]) & cc2420if.netmask[0]) == 0 && \
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((a[1] ^ cc2420if.ipaddr[1]) & cc2420if.netmask[1]) == 0)
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u8_t
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cc2420_send_uaodv(void)
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{
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struct hdr_802_15 h;
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u8_t color = (cc2420_ack_received) ? LEDS_BLUE : LEDS_RED;
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leds_toggle(color);
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h.len = MAC_HDR_LEN + uip_len + 2; /* Including footer[2]. */
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h.fc0 = FC0_TYPE_DATA | FC0_REQ_ACK | FC0_INTRA_PAN;
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h.fc1 = FC1_DST_16 | FC1_SRC_16;
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h.src = uip_hostaddr[1];
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if (BUF->destipaddr[0] == 0xffff && BUF->destipaddr[1] == 0xffff)
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h.dst = 0xffff;
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else {
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uip_ipaddr_t *next_gw;
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if (in_my_network(BUF->destipaddr))
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next_gw = &BUF->destipaddr;
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else
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next_gw = &uip_draddr; /* Default router. */
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if (cc2420_check_remote((*next_gw)[1]) == 0)
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h.dst = (*next_gw)[1]; /* local, use ucast */
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else { /* remote or unknown */
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struct uaodv_rt_entry *route = uaodv_request_route_to(next_gw);
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if (route == NULL) {
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h.dst = (*next_gw)[1]; /* try local while waiting for route */
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} else {
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if (cc2420_check_remote(route->nexthop[1]) == 1) {
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printf("LOST 0x%04x\n", route->nexthop[1]);
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/* Send bad route notification? */
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#ifdef UAODV_BAD_ROUTE
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uaodv_bad_route(route);
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#endif
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uaodv_rt_remove(route);
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h.dst = 0xffff; /* revert to bcast */
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} else /* unknown */ {
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/* This will implicitly update neigbour table. */
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h.dst = route->nexthop[1];
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}
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}
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}
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}
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/* Don't request MAC level ACKs for broadcast packets. */
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if (h.dst == 0xffff)
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h.fc0 &= ~FC0_REQ_ACK;
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if (cc2420_send(&h, 10, &uip_buf[UIP_LLH_LEN], uip_len) < 0) {
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printf("cc2420_send_uaodv too big uip_len=%d\n", uip_len);
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leds_toggle(color);
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return UIP_FW_TOOLARGE;
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}
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leds_toggle(color);
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return UIP_FW_OK;
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}
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