/**
* Processes a received HELLO message.
*/
void
olsr_process_received_hello(struct olsrv2 *olsr, struct message_header *m,
union olsr_ip_addr *in_if,
union olsr_ip_addr *from_addr)
{
struct hello_message message;
if (hello_change_structure(olsr, &message, m) == OLSR_FALSE)
{// wiss: bi 3abi kell el ma3loumet bel "message" w iza fet lahon ma3neta tghayar el form ...bisir bi tayer el message
//Fix for Memory Loss // wiss: sar fi deformation bel message men tayerou
olsr_free_hello_packet(&message);
return;
}
process_hello(olsr, &message, in_if, from_addr);
olsr_free_hello_packet(&message);
olsr->stat.numHelloReceived++;
if(DEBUG_OLSRV2)
{
olsr_printf("Increment Hello Message Received Count to %d\n", olsr->stat.numHelloReceived);
}
return;
}
void
olsr_hello_tap(struct hello_message *message, struct interface *in_if, const union olsr_ip_addr *from_addr)
{
struct neighbor_entry *neighbor;
/*
* Update link status
*/
struct link_entry *lnk = update_link_entry(&in_if->ip_addr, from_addr, message, in_if);
/*check alias message->source_addr*/
if (!ipequal(&message->source_addr,from_addr)){
/*new alias of new neighbour are thrown in the mid table to speed up routing*/
if (olsr_validate_address(from_addr)) {
union olsr_ip_addr * main_addr = mid_lookup_main_addr(from_addr);
if ((main_addr==NULL)||(ipequal(&message->source_addr, main_addr))){
/*struct ipaddr_str srcbuf, origbuf;
olsr_syslog(OLSR_LOG_INFO, "got hello from unknown alias ip of direct neighbour: ip: %s main-ip: %s",
olsr_ip_to_string(&origbuf,&message->source_addr),
olsr_ip_to_string(&srcbuf,from_addr));*/
insert_mid_alias(&message->source_addr, from_addr, message->vtime);
}
else
{
struct ipaddr_str srcbuf, origbuf;
olsr_syslog(OLSR_LOG_INFO, "got hello with invalid from and originator adress pair (%s, %s) Duplicate Ips?\n",
olsr_ip_to_string(&origbuf,&message->source_addr),
olsr_ip_to_string(&srcbuf,from_addr));
}
}
}
if (olsr_cnf->lq_level > 0) {
struct hello_neighbor *walker;
/* just in case our neighbor has changed its HELLO interval */
olsr_update_packet_loss_hello_int(lnk, message->htime);
/* find the input interface in the list of neighbor interfaces */
for (walker = message->neighbors; walker != NULL; walker = walker->next) {
if (walker->link != UNSPEC_LINK
&& ipequal(&walker->address, &in_if->ip_addr)) {
break;
}
}
/*
* memorize our neighbour's idea of the link quality, so that we
* know the link quality in both directions
*
* walker is NULL if there the current interface was not included in
* the message (or was included as an UNSPEC_LINK)
*/
olsr_memorize_foreign_hello_lq(lnk, walker);
/* update packet loss for link quality calculation */
olsr_received_hello_handler(lnk);
}
neighbor = lnk->neighbor;
/*
* Hysteresis
*/
if (olsr_cnf->use_hysteresis) {
/* Update HELLO timeout */
/* printf("MESSAGE HTIME: %f\n", message->htime); */
olsr_update_hysteresis_hello(lnk, message->htime);
}
/* Check if we are chosen as MPR */
if (lookup_mpr_status(message, in_if))
/* source_addr is always the main addr of a node! */
olsr_update_mprs_set(&message->source_addr, message->vtime);
/* Check willingness */
if (neighbor->willingness != message->willingness) {
struct ipaddr_str buf;
OLSR_PRINTF(1, "Willingness for %s changed from %d to %d - UPDATING\n", olsr_ip_to_string(&buf, &neighbor->neighbor_main_addr),
neighbor->willingness, message->willingness);
/*
*If willingness changed - recalculate
*/
neighbor->willingness = message->willingness;
changes_neighborhood = true;
changes_topology = true;
}
/* Don't register neighbors of neighbors that announces WILL_NEVER */
if (neighbor->willingness != WILL_NEVER)
process_message_neighbors(neighbor, message);
/* Process changes immedeatly in case of MPR updates */
olsr_process_changes();
olsr_free_hello_packet(message);
return;
}
