/* communicate the withdrawal of a connected address */
static void connected_withdraw(struct connected *ifc)
{
if (!ifc)
return;
/* Update interface address information to protocol daemon. */
if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL)) {
zebra_interface_address_delete_update(ifc->ifp, ifc);
if (ifc->address->family == AF_INET)
if_subnet_delete(ifc->ifp, ifc);
if (ifc->address->family == AF_INET)
connected_down_ipv4(ifc->ifp, ifc);
#ifdef HAVE_IPV6
else
connected_down_ipv6(ifc->ifp, ifc);
#endif
UNSET_FLAG(ifc->conf, ZEBRA_IFC_REAL);
}
/* The address is not in the kernel anymore, so clear the flag */
UNSET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);
if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED)) {
listnode_delete(ifc->ifp->connected, ifc);
connected_free(ifc);
}
}
/* Interface goes down. We have to manage different behavior of based
OS. */
void
if_down (struct interface *ifp)
{
listnode node;
listnode next;
struct connected *ifc;
struct prefix *p;
/* Notify to the protocol daemons. */
zebra_interface_down_update (ifp);
/* Delete connected routes from the kernel. */
if (ifp->connected)
{
for (node = listhead (ifp->connected); node; node = next)
{
next = node->next;
ifc = getdata (node);
p = ifc->address;
if (p->family == AF_INET)
connected_down_ipv4 (ifp, ifc);
#ifdef HAVE_IPV6
else if (p->family == AF_INET6)
connected_down_ipv6 (ifp, ifc);
#endif /* HAVE_IPV6 */
}
}
/* Examine all static routes which direct to the interface. */
rib_update ();
}
/* Interface goes down. We have to manage different behavior of based
OS. */
void
if_down (struct interface *ifp)
{
struct listnode *node;
struct listnode *next;
struct connected *ifc;
struct prefix *p;
/* Notify to the protocol daemons. */
zebra_interface_down_update (ifp);
/* Delete connected routes from the kernel. */
if (ifp->connected)
{
for (ALL_LIST_ELEMENTS (ifp->connected, node, next, ifc))
{
p = ifc->address;
if (p->family == AF_INET)
connected_down_ipv4 (ifp, ifc);
#ifdef HAVE_IPV6
else if (p->family == AF_INET6)
connected_down_ipv6 (ifp, ifc);
#endif /* HAVE_IPV6 */
}
}
/* Examine all static routes which direct to the interface. */
rib_update ();
}
/* withdraw a connected address */
static void
connected_withdraw (struct connected *ifc)
{
if (! ifc)
return;
/* Update interface address information to protocol daemon. */
if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
{
zebra_interface_address_delete_update (ifc->ifp, ifc);
if_subnet_delete (ifc->ifp, ifc);
if (ifc->address->family == AF_INET)
connected_down_ipv4 (ifc->ifp, ifc);
#ifdef HAVE_IPV6
else
connected_down_ipv6 (ifc->ifp, ifc);
#endif
UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
}
if (!CHECK_FLAG (ifc->conf, ZEBRA_IFC_CONFIGURED))
{
/*
router_id_del_address(ifc);
listnode_delete (ifc->ifp->connected, ifc);
connected_free (ifc);*/
if(ifc->address->family == AF_INET)
{
router_id_del_address(ifc);
listnode_delete (ifc->ifp->connected, ifc);
connected_free (ifc);
}
else
{
if(!CHECK_FLAG(ifc->ipv6_config, RTMD_IPV6_ADDR_CONFIG))
{
router_id_del_address(ifc);
listnode_delete (ifc->ifp->connected, ifc);
connected_free (ifc);
}
else
{
zlog_debug("%s: line %d, Cannot delete IPv6 config addr .\n",__func__,__LINE__);
}
}
}
}
/* Handle an interface delete event */
void
if_delete_update (struct interface *ifp)
{
struct listnode *node;
struct listnode *next;
struct connected *ifc;
struct prefix *p;
if (if_is_up(ifp))
{
zlog_err ("interface %s index %d is still up while being deleted.",
ifp->name, ifp->ifindex);
return;
}
/* Mark interface as inactive */
UNSET_FLAG (ifp->status, ZEBRA_INTERFACE_ACTIVE);
if (IS_ZEBRA_DEBUG_KERNEL)
zlog_info ("interface %s index %d is now inactive.",
ifp->name, ifp->ifindex);
/* Delete connected routes from the kernel. */
if (ifp->connected)
{
for (node = listhead (ifp->connected); node; node = next)
{
next = node->next;
ifc = getdata (node);
p = ifc->address;
if (p->family == AF_INET)
connected_down_ipv4 (ifp, ifc);
#ifdef HAVE_IPV6
else if (p->family == AF_INET6)
connected_down_ipv6 (ifp, ifc);
#endif /* HAVE_IPV6 */
zebra_interface_address_delete_update (ifp, ifc);
UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_CONFIGURED))
{
listnode_delete (ifp->connected, ifc);
connected_free (ifc);
}
}
}
zebra_interface_delete_update (ifp);
}
/* Handle an interface delete event */
void
if_delete_update (struct interface *ifp)
{
struct connected *ifc;
struct prefix *p;
struct route_node *rn;
struct zebra_if *zebra_if;
zebra_if = ifp->info;
if (if_is_up(ifp))
{
zlog_err ("interface %s index %d is still up while being deleted.",
ifp->name, ifp->ifindex);
return;
}
/* Mark interface as inactive */
UNSET_FLAG (ifp->status, ZEBRA_INTERFACE_ACTIVE);
if (IS_ZEBRA_DEBUG_KERNEL)
zlog_debug ("interface %s index %d is now inactive.",
ifp->name, ifp->ifindex);
/* Delete connected routes from the kernel. */
if (ifp->connected)
{
struct listnode *node;
struct listnode *last = NULL;
while ((node = (last ? last->next : listhead (ifp->connected))))
{
ifc = listgetdata (node);
p = ifc->address;
if (p->family == AF_INET
&& (rn = route_node_lookup (zebra_if->ipv4_subnets, p)))
{
struct listnode *anode;
struct listnode *next;
struct listnode *first;
struct list *addr_list;
route_unlock_node (rn);
addr_list = (struct list *) rn->info;
/* Remove addresses, secondaries first. */
first = listhead (addr_list);
for (anode = first->next; anode || first; anode = next)
{
if (!anode)
{
anode = first;
first = NULL;
}
next = anode->next;
ifc = listgetdata (anode);
p = ifc->address;
connected_down_ipv4 (ifp, ifc);
zebra_interface_address_delete_update (ifp, ifc);
UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
/* Remove from subnet chain. */
list_delete_node (addr_list, anode);
route_unlock_node (rn);
/* Remove from interface address list (unconditionally). */
if (!CHECK_FLAG (ifc->conf, ZEBRA_IFC_CONFIGURED))
{
listnode_delete (ifp->connected, ifc);
connected_free (ifc);
}
else
last = node;
}
/* Free chain list and respective route node. */
list_delete (addr_list);
rn->info = NULL;
route_unlock_node (rn);
}
#ifdef HAVE_IPV6
else if (p->family == AF_INET6)
{
connected_down_ipv6 (ifp, ifc);
zebra_interface_address_delete_update (ifp, ifc);
UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_CONFIGURED))
last = node;
else
{
listnode_delete (ifp->connected, ifc);
connected_free (ifc);
}
}
#endif /* HAVE_IPV6 */
else
{
last = node;
}
}
}
zebra_interface_delete_update (ifp);
/* Update ifindex after distributing the delete message. This is in
case any client needs to have the old value of ifindex available
while processing the deletion. Each client daemon is responsible
for setting ifindex to IFINDEX_INTERNAL after processing the
interface deletion message. */
ifp->ifindex = IFINDEX_INTERNAL;
}