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* Added flag UAODV_RERR_UNKNOWN to deal with unknown errors that are 

often the result of rebooting nodes.

* Change function uaodv_bad_route to uaodv_bad_dest.
This commit is contained in:
bg- 2007-05-08 13:33:57 +00:00
parent 9e9cadabaf
commit c23e583129
1 changed files with 22 additions and 14 deletions
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36
core/net/uaodv.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: uaodv.c,v 1.14 2007/05/08 08:41:26 bg- Exp $
* $Id: uaodv.c,v 1.15 2007/05/08 13:33:57 bg- Exp $
*/
/**
@ -207,11 +207,14 @@ send_rerr(uip_ipaddr_t *addr, u32_t *seqno)
print_debug("send RERR for %d.%d.%d.%d\n", uip_ipaddr_to_quad(addr));
rm->type = UAODV_RERR_TYPE;
rm->flags = 0;
rm->reserved = 0;
rm->dest_count = 1;
uip_ipaddr_copy(&rm->unreach[0].addr, addr);
rm->unreach[0].seqno = *seqno;
if(*seqno == 0)
rm->flags = UAODV_RERR_UNKNOWN;
else
rm->flags = 0;
uip_udp_packet_send(bcastconn, rm, sizeof(struct uaodv_msg_rerr));
}
@ -390,12 +393,13 @@ handle_incoming_rerr(void)
return;
rt = uaodv_rt_lookup(&rm->unreach[0].addr);
if(rt != NULL
&& uip_ipaddr_cmp(&rt->nexthop, uip_udp_sender())
&& SCMP32(rt->seqno, ntohl(rm->unreach[0].seqno)) <= 0) {
rt->is_bad = 1;
print_debug("RERR rebroadcast\n");
uip_udp_packet_send(bcastconn, rm, sizeof(struct uaodv_msg_rerr));
if(rt != NULL && uip_ipaddr_cmp(&rt->nexthop, uip_udp_sender())) {
if(rm->flags & UAODV_RERR_UNKNOWN || rm->unreach[0].seqno == 0
|| SCMP32(rt->seqno, ntohl(rm->unreach[0].seqno)) <= 0) {
rt->is_bad = 1;
print_debug("RERR rebroadcast\n");
uip_udp_packet_send(bcastconn, rm, sizeof(struct uaodv_msg_rerr));
}
}
}
/*---------------------------------------------------------------------------*/
@ -431,14 +435,18 @@ static uip_ipaddr_t bad_dest;
static u32_t bad_seqno; /* In network byte order! */
void
uaodv_bad_route(struct uaodv_rt_entry *rt)
uaodv_bad_dest(uip_ipaddr_t *dest)
{
if(rt == NULL)
return;
struct uaodv_rt_entry *rt = uaodv_rt_lookup(dest);
uip_ipaddr_copy(&bad_dest, &rt->dest);
bad_seqno = htonl(rt->seqno);
rt->is_bad = 1;
if(rt == NULL)
bad_seqno = 0; /* Or flag this in RERR? */
else {
rt->is_bad = 1;
bad_seqno = htonl(rt->seqno);
}
uip_ipaddr_copy(&bad_dest, dest);
command = COMMAND_SEND_RERR;
process_post(&uaodv_process, PROCESS_EVENT_MSG, NULL);
}