static void pim_addr_change(struct interface *ifp)
{
struct pim_interface *pim_ifp;
pim_ifp = ifp->info;
zassert(pim_ifp);
pim_if_dr_election(ifp); /* router's own DR Priority (addr) changes -- Done TODO T30 */
pim_if_update_join_desired(pim_ifp); /* depends on DR */
pim_if_update_could_assert(ifp); /* depends on DR */
pim_if_update_my_assert_metric(ifp); /* depends on could_assert */
pim_if_update_assert_tracking_desired(ifp); /* depends on DR, join_desired */
/*
RFC 4601: 4.3.1. Sending Hello Messages
1) Before an interface goes down or changes primary IP address, a
Hello message with a zero HoldTime should be sent immediately
(with the old IP address if the IP address changed).
-- FIXME See CAVEAT C13
2) After an interface has changed its IP address, it MUST send a
Hello message with its new IP address.
-- DONE below
3) If an interface changes one of its secondary IP addresses, a
Hello message with an updated Address_List option and a non-zero
HoldTime should be sent immediately.
-- FIXME See TODO T31
*/
pim_ifp->pim_ifstat_hello_sent = 0; /* reset hello counter */
if (pim_ifp->pim_sock_fd < 0)
return;
pim_hello_restart_now(ifp); /* send hello and restart timer */
}
/*
RFC 4601: 4.3.1. Sending Hello Messages
Thus, if a router needs to send a Join/Prune or Assert message on an
interface on which it has not yet sent a Hello message with the
currently configured IP address, then it MUST immediately send the
relevant Hello message without waiting for the Hello Timer to
expire, followed by the Join/Prune or Assert message.
*/
void pim_hello_require(struct interface *ifp)
{
struct pim_interface *pim_ifp;
zassert(ifp);
pim_ifp = ifp->info;
zassert(pim_ifp);
if (pim_ifp->pim_ifstat_hello_sent)
return;
pim_hello_restart_now(ifp); /* Send hello and restart timer */
}
