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Added functionality for decaying routes: when a packet is sent over a route, it is decayed. If the route is not refreshed within four packets (with the route_refresh() function, which is called when a new packet arrives), the route is dropped. A route can be decayed at most once per second

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This commit is contained in:
adamdunkels 2009-05-10 21:08:01 +00:00
parent a220da3e88
commit fe30886b37
3 changed files with 106 additions and 22 deletions
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22
core/net/uip-over-mesh.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: uip-over-mesh.c,v 1.13 2009/05/04 11:24:04 adamdunkels Exp $
* $Id: uip-over-mesh.c,v 1.14 2009/05/10 21:08:01 adamdunkels Exp $
*/
/**
@ -81,11 +81,19 @@ static void
recv_data(struct unicast_conn *c, rimeaddr_t *from)
{
struct route_entry *e;
rimeaddr_t source;
uip_len = packetbuf_copyto(&uip_buf[UIP_LLH_LEN]);
source.u8[0] = BUF->srcipaddr.u8[2];
source.u8[1] = BUF->srcipaddr.u8[3];
e = route_lookup(from);
route_refresh(e);
uip_len = packetbuf_copyto(&uip_buf[UIP_LLH_LEN]);
if(e == NULL) {
route_add(&source, from, 10, 0);
} else {
route_refresh(e);
}
/* uip_len = hc_inflate(&uip_buf[UIP_LLH_LEN], uip_len);*/
@ -117,6 +125,7 @@ new_route(struct route_discovery_conn *c, rimeaddr_t *to)
rt = route_lookup(&queued_receiver);
if(rt) {
route_decay(rt);
send_data(&queued_receiver);
}
}
@ -179,7 +188,7 @@ void
uip_over_mesh_init(u16_t channels)
{
printf("Our address is %d.%d (%d.%d.%d.%d)\n",
PRINTF("Our address is %d.%d (%d.%d.%d.%d)\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
uip_hostaddr.u8[0], uip_hostaddr.u8[1],
uip_hostaddr.u8[2], uip_hostaddr.u8[3]);
@ -191,7 +200,7 @@ uip_over_mesh_init(u16_t channels)
&trickle_call);
/* Set lifetime to 10 seconds for non-refreshed routes. */
route_set_lifetime(10);
route_set_lifetime(30);
}
/*---------------------------------------------------------------------------*/
u8_t
@ -257,6 +266,7 @@ uip_over_mesh_send(void)
route_discovery_discover(&route_discovery, &receiver, ROUTE_TIMEOUT);
}
} else {
route_decay(rt);
send_data(&rt->nexthop);
}
return UIP_FW_OK;