void routingtable_break_and_get_all_hopping_over(struct netaddr *hop,
struct unreachable_node unreachable_nodes[],
size_t *len)
{
*len = 0; /* to be sure */
for (unsigned i = 0; i < AODVV2_MAX_ROUTING_ENTRIES; i++) {
_reset_entry_if_stale(i);
if (netaddr_cmp(&routing_table[i].nextHopAddr, hop) == 0) {
if (routing_table[i].state == ROUTE_STATE_ACTIVE &&
*len < AODVV2_MAX_UNREACHABLE_NODES) {
/* when the max number of unreachable nodes is reached we're screwed.
* the above check is just damage control. */
unreachable_nodes[*len].addr = routing_table[i].addr;
unreachable_nodes[*len].seqnum = routing_table[i].seqnum;
(*len)++;
DEBUG("\t[routing] unreachable node found: %s\n", netaddr_to_string(&nbuf, &routing_table[i].nextHopAddr));
}
routing_table[i].state = ROUTE_STATE_INVALID;
DEBUG("\t[routing] number of unreachable nodes: %i\n", *len);
}
}
}
void routingtable_delete_entry(struct netaddr *addr, aodvv2_metric_t metricType)
{
for (unsigned i = 0; i < AODVV2_MAX_ROUTING_ENTRIES; i++) {
_reset_entry_if_stale(i);
if (!netaddr_cmp(&routing_table[i].addr, addr)
&& routing_table[i].metricType == metricType) {
memset(&routing_table[i], 0, sizeof(routing_table[i]));
return;
}
}
}
/*
* retrieve pointer to a comparable (according to Section 6.7.)
* RREQ table entry if it exists and NULL otherwise.
* Two AODVv2 RREQ messages are comparable if:
* - they have the same metric type
* - they have the same OrigNode and TargNode addresses
*/
static struct aodvv2_rreq_entry *_get_comparable_rreq(struct aodvv2_packet_data *packet_data)
{
for (unsigned i = 0; i < AODVV2_RREQ_BUF; i++) {
_reset_entry_if_stale(i);
if (!netaddr_cmp(&rreq_table[i].origNode, &packet_data->origNode.addr)
&& !netaddr_cmp(&rreq_table[i].targNode, &packet_data->targNode.addr)
&& rreq_table[i].metricType == packet_data->metricType) {
return &rreq_table[i];
}
}
return NULL;
}
struct aodvv2_routing_entry_t *routingtable_get_entry(struct netaddr *addr,
aodvv2_metric_t metricType)
{
for (unsigned i = 0; i < AODVV2_MAX_ROUTING_ENTRIES; i++) {
_reset_entry_if_stale(i);
if (!netaddr_cmp(&routing_table[i].addr, addr)
&& routing_table[i].metricType == metricType) {
DEBUG("[routing] found entry for %s :", netaddr_to_string(&nbuf, addr));
#if ENABLE_DEBUG
print_routingtable_entry(&routing_table[i]);
#endif
return &routing_table[i];
}
}
return NULL;
}
