static int pim_zebra_if_del(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct interface *ifp;
/*
zebra api adds/dels interfaces using the same call
interface_add_read below, see comments in lib/zclient.c
comments in lib/zclient.c seem to indicate that calling
zebra_interface_add_read is the correct call, but that
results in an attemted out of bounds read which causes
pimd to assert. Other clients use zebra_interface_state_read
and it appears to work just fine.
*/
ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
if (!ifp)
return 0;
if (PIM_DEBUG_ZEBRA) {
zlog_debug("%s: %s index %d flags %ld metric %d mtu %d operative %d",
__PRETTY_FUNCTION__,
ifp->name, ifp->ifindex, (long)ifp->flags, ifp->metric,
ifp->mtu, if_is_operative(ifp));
}
if (!if_is_operative(ifp))
pim_if_addr_del_all(ifp);
return 0;
}
static void zclient_broken(struct zclient *zclient)
{
struct listnode *ifnode;
struct interface *ifp;
zlog_warn("%s %s: broken zclient connection",
__FILE__, __PRETTY_FUNCTION__);
for (ALL_LIST_ELEMENTS_RO(iflist, ifnode, ifp)) {
pim_if_addr_del_all(ifp);
}
/* upon return, zclient will discard connected addresses */
}
static int pim_zebra_if_state_down(int command, struct zclient *zclient,
zebra_size_t length)
{
struct interface *ifp;
/*
zebra api notifies interface up/down events by using the same call
zebra_interface_state_read below, see comments in lib/zclient.c
*/
ifp = zebra_interface_state_read(zclient->ibuf);
if (!ifp)
return 0;
zlog_info("INTERFACE DOWN: %s ifindex=%d", ifp->name, ifp->ifindex);
if (PIM_DEBUG_ZEBRA) {
zlog_debug("%s: %s index %d flags %ld metric %d mtu %d operative %d",
__PRETTY_FUNCTION__,
ifp->name, ifp->ifindex, (long)ifp->flags, ifp->metric,
ifp->mtu, if_is_operative(ifp));
}
if (!if_is_operative(ifp)) {
/*
pim_if_addr_del_all() suffices for shutting down IGMP,
but not for shutting down PIM
*/
pim_if_addr_del_all(ifp);
/*
pim_sock_delete() closes the socket, stops read and timer threads,
and kills all neighbors.
*/
if (ifp->info) {
pim_sock_delete(ifp, "link down");
}
}
return 0;
}
