void hello_send(void *arg)
{
RREP *rrep;
u8_t flags = 0;
struct in_addr dest;
struct timeval now;
long time_diff;
gettimeofday(&now, NULL);
if(timeval_diff(&now, &this_host.last_forward_time) > ACTIVE_ROUTE_TIMEOUT)
{
hello_stop();
return;
}
time_diff = timeval_diff(&now, &this_host.last_broadcast_time);
if(time_diff >= HELLO_INTERVAL)
{
rrep = rrep_create(flags, 0, 0, this_host.dev.ipaddr, this_host.seqno, this_host.dev.ipaddr, ALLOWED_HELLO_LOSS * HELLO_INTERVAL);
/////////No ext
dest.s_addr = AODV_BROADCAST;
aodv_socket_send((AODV_msg *)rrep, dest, RREP_SIZE, 1, &this_host.dev);
timer_set_timeout(&hello_timer, HELLO_INTERVAL);
}
else
{
timer_set_timeout(&hello_timer, HELLO_INTERVAL - time_diff);
}
}
void hello_send(void *arg) {
RREP *rrep;
AODV_ext *ext = NULL;
u_int8_t flags = 0;
u_int64_t time_expired;
rt_table_t *entry;
int msg_size = RREP_SIZE;
time_expired = get_currtime() - this_host->bcast_time;
/* This check will ensure we don't send unnecessary hello msgs, in case
we have sent other bcast msgs within HELLO_INTERVAL */
if (time_expired >= HELLO_INTERVAL) {
#ifdef DEBUG_HELLO
log(LOG_DEBUG, 0, "SEND_BCAST: sending Hello to %s",
ip_to_str(AODV_BROADCAST));
#endif
rrep = rrep_create(flags, 0, 0, this_host->ipaddr, this_host->seqno,
this_host->ipaddr, ALLOWED_HELLO_LOSS*HELLO_INTERVAL);
/* Assemble a RREP extension which contain our neighbor set... */
if(unidir_hack) {
u_int32_t neigh;
int i;
ext = (AODV_ext *)((char *)rrep + RREP_SIZE);
ext->type = RREP_HELLO_NEIGHBOR_SET_EXT;
ext->length = 0;
for(i = 0; i < RT_TABLESIZE; i++) {
entry = routing_table[i];
while(entry != NULL) {
/* If an entry has an active hello timer, we asume that we are
receiving hello messages from that node... */
if(entry->hello_timer_id != 0) {
#ifdef DEBUG_HELLO
log(LOG_INFO, 0, "hello_send: Adding %s to hello neighbor set ext",
ip_to_str(entry->dest));
#endif
neigh = htonl(entry->dest);
memcpy(AODV_EXT_NEXT(ext), &neigh, 4);
ext->length += 4;
}
entry = entry->next;
}
}
if(ext->length)
msg_size = RREP_SIZE + AODV_EXT_SIZE(ext);
}
aodv_socket_send((AODV_msg *)rrep, AODV_BROADCAST, msg_size, 1);
timer_new(HELLO_INTERVAL, hello_send, NULL);
}
else {
timer_new((HELLO_INTERVAL - time_expired), hello_send, NULL);
}
}
