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prevent neighbor ETX from wrap-over

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zhitao 2009-10-22 13:11:20 +00:00
parent 178548413e
commit 1913e1a936
1 changed files with 4 additions and 1 deletions
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5
core/net/rime/neighbor.c
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@ -33,7 +33,7 @@
* *
* This file is part of the Contiki operating system. * This file is part of the Contiki operating system.
* *
* $Id: neighbor.c,v 1.19 2009/10/21 21:25:10 nifi Exp $ * $Id: neighbor.c,v 1.20 2009/10/22 13:11:20 zhitao Exp $
*/ */
/** /**
@ -150,6 +150,9 @@ neighbor_timedout_etx(struct neighbor *n, uint8_t etx)
{ {
if(n != NULL) { if(n != NULL) {
n->etxs[n->etxptr] += etx; n->etxs[n->etxptr] += etx;
if(n->etxs[n->etxptr] > RTMETRIC_MAX / NEIGHBOR_ETX_SCALE) {
n->etxs[n->etxptr] = RTMETRIC_MAX / NEIGHBOR_ETX_SCALE;
}
n->etxptr = (n->etxptr + 1) % NEIGHBOR_NUM_ETXS; n->etxptr = (n->etxptr + 1) % NEIGHBOR_NUM_ETXS;
} }
} }