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fixing bug with sending of self-announce acks before route has been

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established.
This commit is contained in:
gardners 2012-04-28 17:49:39 +09:30
parent 5497b8fd0d
commit 6431b4fd0a
1 changed files with 19 additions and 16 deletions
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35
overlay_route.c
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@ -519,23 +519,26 @@ int overlay_route_ack_selfannounce(overlay_frame *f,overlay_neighbour *n)
However, if there is no known next-hop for this node (because the return path
has not yet begun to be built), then we need to set the nexthop to broadcast. */
out->nexthop_address_status=OA_UNINITIALISED;
{ unsigned char nexthop[SID_SIZE]; int nexthoplen,interface;
if (overlay_get_nexthop(out->destination,nexthop,&nexthoplen,&interface))
{
/* No path, so set nexthop to be broadcast, but don't broadcast it too far. */
int i;
for(i=0;i<(SID_SIZE-8);i++) out->nexthop[i]=0xff;
for(i=24;i<SID_SIZE;i++) out->nexthop[i]=random()&0xff;
out->nexthop_address_status=OA_RESOLVED;
out->ttl=2;
if (debug&DEBUG_OVERLAYROUTING)
fprintf(stderr,"Broadcasting ack to selfannounce");
}
else
if (debug&DEBUG_OVERLAYROUTING)
fprintf(stderr,"singlecasting ack to selfannounce via known route");
{
unsigned char nexthop[SID_SIZE];
int len=0;
int next_hop_interface=-1;
int r=overlay_get_nexthop(out->destination,nexthop,&len,
&next_hop_interface);
if (r) {
/* no open path, so convert to broadcast */
int i;
for(i=0;i<(SID_SIZE-8);i++) out->nexthop[i]=0xff;
for(i=24;i<SID_SIZE;i++) out->nexthop[i]=random()&0xff;
out->nexthop_address_status=OA_RESOLVED;
out->ttl=2;
out->isBroadcast=1;
for(i=0;i<OVERLAY_MAX_INTERFACES;i++)out->broadcast_sent_via[i]=0;
if (1||debug&DEBUG_OVERLAYROUTING)
WHY("Broadcasting ack to selfannounce for hithero unroutable node");
}
}
/* Set the time in the ack. Use the last sequence number we have seen
from this neighbour, as that may be helpful information for that neighbour
down the track. My policy is to communicate that information which should