/* Handle changes to addresses and send the neccesary announcements
* to clients. */
static void connected_update(struct interface *ifp, struct connected *ifc)
{
struct connected *current;
/* Check same connected route. */
if ((current = connected_check(ifp, (struct prefix *)ifc->address))) {
if (CHECK_FLAG(current->conf, ZEBRA_IFC_CONFIGURED))
SET_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED);
/* Avoid spurious withdraws, this might be just the kernel 'reflecting'
* back an address we have already added.
*/
if (connected_same(current, ifc)) {
/* nothing to do */
connected_free(ifc);
return;
}
/* Clear the configured flag on the old ifc, so it will be freed by
* connected withdraw. */
UNSET_FLAG(current->conf, ZEBRA_IFC_CONFIGURED);
connected_withdraw(current); /* implicit withdraw - freebsd does this */
}
/* If the connected is new or has changed, announce it, if it is usable */
if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
connected_announce(ifp, ifc);
}
/* Handle implicit withdrawals of addresses, where a system ADDs an address
* to an interface which already has the same address configured.
*
* Returns the struct connected which must be announced to clients,
* or NULL if nothing to do.
*/
static struct connected *
connected_implicit_withdraw (struct interface *ifp, struct connected *ifc)
{
struct connected *current;
/* Check same connected route. */
if ((current = connected_check (ifp, (struct prefix *) ifc->address)))
{
if (CHECK_FLAG(current->conf, ZEBRA_IFC_CONFIGURED))
SET_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED);
/* Avoid spurious withdraws, this might be just the kernel 'reflecting'
* back an address we have already added.
*/
if (connected_same (current, ifc) && CHECK_FLAG(current->conf, ZEBRA_IFC_REAL))
{
/* nothing to do */
connected_free (ifc);
return NULL;
}
UNSET_FLAG(current->conf, ZEBRA_IFC_CONFIGURED);
if(CHECK_FLAG (current->flags, ZEBRA_IFA_EXPIRES))
{
SET_FLAG (ifc->flags, ZEBRA_IFA_EXPIRES);
}
ifc->expires = current->expires; // HSA - need to copy over address expiration info if we are to explicitly withdraw a route
connected_withdraw (current); /* implicit withdraw - freebsd does this */
}
return ifc;
}
/* Handle implicit withdrawals of addresses, where a system ADDs an address
* to an interface which already has the same address configured.
*
* Returns the struct connected which must be announced to clients,
* or NULL if nothing to do.
*/
static struct connected *
connected_implicit_withdraw (struct interface *ifp, struct connected *ifc)
{
struct connected *current;
/* Check same connected route. */
if ((current = connected_check (ifp, (struct prefix *) ifc->address)))
{
if (CHECK_FLAG(current->conf, ZEBRA_IFC_CONFIGURED))
SET_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED);
if (CHECK_FLAG (current->ipv6_config, RTMD_IPV6_ADDR_CONFIG))
SET_FLAG (ifc->ipv6_config, RTMD_IPV6_ADDR_CONFIG);
/* Avoid spurious withdraws, this might be just the kernel 'reflecting'
* back an address we have already added.
*/
if (connected_same (current, ifc))
{
/* nothing to do */
connected_free (ifc);
return NULL;
}
UNSET_FLAG(current->conf, ZEBRA_IFC_CONFIGURED);
UNSET_FLAG(current->ipv6_config, RTMD_IPV6_ADDR_CONFIG);
connected_withdraw (current); /* implicit withdraw - freebsd does this */
}
return ifc;
}
void
connected_delete_ipv6 (struct interface *ifp, struct in6_addr *address,
u_char prefixlen, struct in6_addr *broad)
{
struct prefix_ipv6 p;
struct connected *ifc;
memset (&p, 0, sizeof (struct prefix_ipv6));
p.family = AF_INET6;
memcpy (&p.prefix, address, sizeof (struct in6_addr));
p.prefixlen = prefixlen;
ifc = connected_check (ifp, (struct prefix *) &p);
if (! ifc)
return;
connected_withdraw (ifc);
}
/* Delete connected IPv4 route to the interface. */
void
connected_delete_ipv4 (struct interface *ifp, int flags, struct in_addr *addr,
u_char prefixlen, struct in_addr *broad)
{
struct prefix_ipv4 p;
struct connected *ifc;
memset (&p, 0, sizeof (struct prefix_ipv4));
p.family = AF_INET;
p.prefix = *addr;
p.prefixlen = prefixlen;
ifc = connected_check (ifp, (struct prefix *) &p);
if (! ifc)
return;
connected_withdraw (ifc);
}
