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fixed loop detection bug in RPL

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This commit is contained in:
Joakim Eriksson 2012-01-13 05:37:30 -08:00
parent 8ee68b4345
commit 6ee05f4a2d
1 changed files with 6 additions and 4 deletions
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10
core/net/rpl/rpl-ext-header.c
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@ -66,8 +66,8 @@ int
rpl_verify_header(int uip_ext_opt_offset)
{
rpl_instance_t *instance;
long diff;
int down;
uint8_t sender_closer;
if(UIP_EXT_HDR_OPT_RPL_BUF->opt_len != RPL_HDR_OPT_LEN) {
PRINTF("RPL: Bad header option! (wrong length)\n");
@ -99,9 +99,11 @@ rpl_verify_header(int uip_ext_opt_offset)
PRINTF("RPL: Packet going %s\n", down == 1 ? "down" : "up");
diff = UIP_EXT_HDR_OPT_RPL_BUF->senderrank - instance->current_dag->rank;
if((down && diff > 0) || (!down && diff < 0)) {
PRINTF("RPL: Loop detected\n");
sender_closer = UIP_EXT_HDR_OPT_RPL_BUF->senderrank < instance->current_dag->rank;
if((down && !sender_closer) || (!down && sender_closer)) {
PRINTF("RPL: Loop detected - senderrank: %d my-rank: %d sender_closer: %d\n",
UIP_EXT_HDR_OPT_RPL_BUF->senderrank, instance->current_dag->rank,
sender_closer);
if(UIP_EXT_HDR_OPT_RPL_BUF->flags & RPL_HDR_OPT_RANK_ERR) {
PRINTF("RPL: Rank error signalled in RPL option!\n");
/* We should try to repair it, not implemented for the moment */