/*
* Don't learn certain addresses.
*/
bool
mroute_learnable_address (const struct mroute_addr *addr)
{
int i;
bool not_all_zeros = false;
bool not_all_ones = false;
for (i = 0; i < addr->len; ++i)
{
int b = addr->addr[i];
if (b != 0x00)
not_all_zeros = true;
if (b != 0xFF)
not_all_ones = true;
}
return not_all_zeros && not_all_ones && !is_mac_mcast_maddr (addr);
}
/*
* Don't learn certain addresses.
*/
bool
mroute_learnable_address(const struct mroute_addr *addr, struct gc_arena *gc)
{
int i;
bool all_zeros = true;
bool all_ones = true;
for (i = 0; i < addr->len; ++i)
{
int b = addr->raw_addr[i];
if (b != 0x00)
{
all_zeros = false;
}
if (b != 0xFF)
{
all_ones = false;
}
}
/* only networkss shorter than 8 bits are allowed to be all 0s. */
if (all_zeros
&& !((addr->type & MR_WITH_NETBITS) && (addr->netbits < 8)))
{
msg(D_MULTI_LOW, "Can't learn %s: network is all 0s, but netbits >= 8",
mroute_addr_print(addr, gc));
return false;
}
if (all_ones)
{
msg(D_MULTI_LOW, "Can't learn %s: network is all 1s",
mroute_addr_print(addr, gc));
return false;
}
if (is_mac_mcast_maddr(addr))
{
msg(D_MULTI_LOW, "Can't learn %s: network is a multicast address",
mroute_addr_print(addr, gc));
return false;
}
return true;
}
