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ospf6d: Set loopback interface cost to 0

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https://www.rfc-editor.org/rfc/rfc5340.html#page-37 states:

If the interface type is point-
      to-multipoint or the interface is in the state Loopback, the
      global scope IPv6 addresses associated with the interface (if any)
      are copied into the intra-area-prefix-LSA with the PrefixOptions
      LA-bit set, the PrefixLength set to 128, and the metric set to 0.

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
This commit is contained in:
Donatas Abraitis 2023-10-23 11:24:12 +03:00
parent e8615867d0
commit 80dfa9e012
1 changed files with 11 additions and 1 deletions
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12
ospf6d/ospf6_interface.c
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@ -128,9 +128,19 @@ static uint8_t ospf6_default_iftype(struct interface *ifp)
static uint32_t ospf6_interface_get_cost(struct ospf6_interface *oi)
{
/* If all else fails, use default OSPF cost */
uint32_t cost;
uint32_t cost = 0;
uint32_t bw, refbw;
struct ospf6 *ospf6;
/* If the interface type is point-to-multipoint or the interface
* is in the state Loopback, the global scope IPv6 addresses
* associated with the interface (if any) are copied into the
* intra-area-prefix-LSA with the PrefixOptions LA-bit set, the
* PrefixLength set to 128, and the metric set to 0.
*/
if (if_is_loopback(oi->interface))
return cost;
/* interface speed and bw can be 0 in some platforms,
* use ospf default bw. If bw is configured then it would
* be used.