int gotFreshRoute(char *address, int staleness)
{
int i;
struct sockaddr *sa;
char interface_addr[16];
time_t curr_time = time(NULL);
i = findInTable(address);
//if there is a route that is not stale, return it
if(i >= 0)
{
if(routing_table[i].timestamp == 0)
{
printf("No route\n");
return -1;
}
if(difftime(routing_table[i].timestamp, curr_time) < staleness)
{
printf("Got fresh route\n");
return i;
}
else
{
deleteRoute(i);
printf("Got stale route, deleting\n");
return -1;
}
}
printf("No route for %s\n", address);
return -1;
}
boolean RF22Router::deleteRouteTo(uint8_t dest)
{
uint8_t i;
for (i = 0; i < RF22_ROUTING_TABLE_SIZE; i++)
{
if (_routes[i].dest == dest)
{
deleteRoute(i);
return true;
}
}
return false;
}
void RF22Router::retireOldestRoute()
{
// We just obliterate the first in the table and clear the last
deleteRoute(0);
}
/**
* Accept a V3 Membership Report
*/
void acceptV3GroupReport(uint32_t src, uint8_t type, struct igmpv3_groupreport* igmpv3rep) {
struct IfDesc *sourceVif;
// Sanitycheck the group adress...
if(!IN_MULTICAST( ntohl(group) )) {
my_log(LOG_WARNING, 0, "The group address %s is not a valid Multicast group.",
inetFmt(group, s1));
return;
}
// Find the interface on which the report was recieved.
sourceVif = getIfByAddress( src );
if(sourceVif == NULL) {
my_log(LOG_WARNING, 0, "No interfaces found for source %s",
inetFmt(src,s1));
return;
}
if(sourceVif->InAdr.s_addr == src) {
my_log(LOG_NOTICE, 0, "The IGMP message was from myself. Ignoring.");
return;
}
// We have a IF so check that it's an downstream IF.
if(sourceVif->state != IF_STATE_DOWNSTREAM) {
// Log the state of the interface the report was recieved on.
my_log(LOG_INFO, 0, "Membership report was recieved on %s. Ignoring.",
sourceVif->state==IF_STATE_UPSTREAM?"the upstream interface":"a disabled interface");
} else {
my_log(LOG_DEBUG, 0, "IGMPv3 Membership Report")
// TODO: Can we batch-report here?
uint16_t num_entries = ntohl(igmpv3rep->num_entries);
uint16_t eix = 0;
while ( eix < num_entries )
{
struct igmpv3_groupreport_entry* e = (struct igmpv3_groupreport_entry* igmpv3rep->grec) + eix;
uint16_t num_sources = ntohl(e->nsrcs);
uint16_t six = 0;
while ( six < num_sources )
{
uint32_t* srcgroup = (uint32_t* e->sources) + six;
group = ntohl(*srcgroup);
switch ( e->type == 0x0 )
{
case IGMPV3_GRE_MODE_INCLUDE:
case IGMPV3_GRE_CHMODE_INCLUDE:
case IGMPV3_GRE_ALLOW_NEW_SOURCES:
my_log(LOG_DEBUG, 0, "IGMPv3 Subscribe to %s.",
inetFmt(group, s1));
insertRoute(group, sourceVif->index);
break;
case IGMPV3_GRE_MODE_EXCLUDE:
case IGMPV3_GRE_CHMODE_EXCLUDE:
case IGMPV3_GRE_BLOCK_OLD_SOURCES:
my_log(LOG_DEBUG, 0, "IGMPv3 Unsubscribe from %s.",
inetFmt(group, s1));
deleteRoute(group, sourceVif->index);
break;
default:
my_log(LOG_INFO, 0, "Membership V3 group report received with unknown type %d.", e->type);
}
};
eix++;
};
return;
}
}