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pimd: implement MSDP shutdown command

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Allow MSDP protocol to be disabled.

Signed-off-by: Rafael Zalamena <rzalamena@opensourcerouting.org>
This commit is contained in:
Rafael Zalamena 2022-05-10 08:23:33 -03:00
parent 440a0d3f76
commit 379dc9ee2f
7 changed files with 125 additions and 0 deletions
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19
pimd/pim_cmd.c
View file

@ -7560,6 +7560,24 @@ DEFPY_ATTR(no_ip_pim_msdp_mesh_group,
return ret;
}
DEFPY(msdp_shutdown,
msdp_shutdown_cmd,
"[no] msdp shutdown",
NO_STR
CFG_MSDP_STR
"Shutdown MSDP operation\n")
{
char xpath_value[XPATH_MAXLEN];
snprintf(xpath_value, sizeof(xpath_value), "./msdp/shutdown");
if (no)
nb_cli_enqueue_change(vty, xpath_value, NB_OP_DESTROY, NULL);
else
nb_cli_enqueue_change(vty, xpath_value, NB_OP_MODIFY, "true");
return nb_cli_apply_changes(vty, NULL);
}
static void ip_msdp_show_mesh_group(struct vty *vty, struct pim_msdp_mg *mg,
struct json_object *json)
{
@ -8954,6 +8972,7 @@ void pim_cmd_init(void)
install_element(PIM_NODE, &no_pim_msdp_mesh_group_cmd);
install_element(PIM_NODE, &msdp_log_neighbor_changes_cmd);
install_element(PIM_NODE, &msdp_log_sa_changes_cmd);
install_element(PIM_NODE, &msdp_shutdown_cmd);
install_element(PIM_NODE, &pim_bsr_candidate_rp_cmd);
install_element(PIM_NODE, &pim_bsr_candidate_rp_group_cmd);

50
pimd/pim_msdp.c
View file

@ -734,6 +734,10 @@ static void pim_msdp_peer_state_chg_log(struct pim_msdp_peer *mp)
* a tcp connection will be made */
static void pim_msdp_peer_connect(struct pim_msdp_peer *mp)
{
/* Stop here if we are shutdown. */
if (mp->pim->msdp.shutdown)
return;
mp->state = PIM_MSDP_CONNECTING;
if (pim_msdp_log_neighbor_events(mp->pim))
pim_msdp_peer_state_chg_log(mp);
@ -744,6 +748,10 @@ static void pim_msdp_peer_connect(struct pim_msdp_peer *mp)
/* 11.2.A3: passive peer - just listen for connections */
static void pim_msdp_peer_listen(struct pim_msdp_peer *mp)
{
/* Stop here if we are shutdown. */
if (mp->pim->msdp.shutdown)
return;
mp->state = PIM_MSDP_LISTEN;
if (pim_msdp_log_neighbor_events(mp->pim))
pim_msdp_peer_state_chg_log(mp);
@ -1311,6 +1319,9 @@ bool pim_msdp_peer_config_write(struct vty *vty, struct pim_instance *pim)
written = true;
}
if (pim->msdp.shutdown)
vty_out(vty, " msdp shutdown\n");
return written;
}
@ -1431,3 +1442,42 @@ struct pim_msdp_mg_mbr *pim_msdp_mg_mbr_add(struct pim_instance *pim,
return mbr;
}
void pim_msdp_shutdown(struct pim_instance *pim, bool state)
{
struct pim_msdp_peer *peer;
struct listnode *node;
/* Same value nothing to do. */
if (pim->msdp.shutdown == state)
return;
if (state) {
pim->msdp.shutdown = true;
for (ALL_LIST_ELEMENTS_RO(pim->msdp.peer_list, node, peer)) {
/* Stop the tcp connection and shutdown all timers */
pim_msdp_peer_stop_tcp_conn(peer, true);
/* Stop listening socket if any. */
event_cancel(&peer->auth_listen_ev);
if (peer->auth_listen_sock != -1)
close(peer->auth_listen_sock);
/* Disable and remove listener flag. */
UNSET_FLAG(pim->msdp.flags, PIM_MSDPF_ENABLE | PIM_MSDPF_LISTENER);
}
} else {
pim->msdp.shutdown = false;
for (ALL_LIST_ELEMENTS_RO(pim->msdp.peer_list, node, peer)) {
/* Start connection again. */
if (PIM_MSDP_PEER_IS_LISTENER(peer))
pim_msdp_peer_listen(peer);
else
pim_msdp_peer_connect(peer);
SET_FLAG(pim->msdp.flags, PIM_MSDPF_ENABLE);
}
}
}

15
pimd/pim_msdp.h
View file

@ -216,6 +216,9 @@ struct pim_msdp {
uint32_t keep_alive;
/** MSDP global connection retry period. */
uint32_t connection_retry;
/** MSDP operation state. */
bool shutdown;
};
#define PIM_MSDP_PEER_READ_ON(mp) \
@ -327,6 +330,14 @@ void pim_msdp_peer_change_source(struct pim_msdp_peer *mp,
*/
void pim_msdp_peer_restart(struct pim_msdp_peer *mp);
/**
* Toggle MSDP functionality administrative state.
*
* \param pim PIM instance we want to shutdown.
* \param state shutdown state.
*/
void pim_msdp_shutdown(struct pim_instance *pim, bool state);
#else /* PIM_IPV == 6 */
static inline void pim_msdp_init(struct pim_instance *pim,
struct event_loop *master)
@ -370,6 +381,10 @@ static inline bool pim_msdp_peer_config_write(struct vty *vty,
{
return false;
}
static inline void pim_msdp_shutdown(struct pim_instance *pim, bool state)
{
}
#endif /* PIM_IPV == 6 */
#endif

6
pimd/pim_nb.c
View file

@ -141,6 +141,12 @@ const struct frr_yang_module_info frr_pim_info = {
.modify = pim_msdp_log_sa_events_modify,
}
},
{
.xpath = "/frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp/shutdown",
.cbs = {
.modify = pim_msdp_shutdown_modify,
}
},
{
.xpath = "/frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-mesh-groups",
.cbs = {

1
pimd/pim_nb.h
View file

@ -56,6 +56,7 @@ int pim_msdp_keep_alive_modify(struct nb_cb_modify_args *args);
int pim_msdp_connection_retry_modify(struct nb_cb_modify_args *args);
int pim_msdp_log_neighbor_events_modify(struct nb_cb_modify_args *args);
int pim_msdp_log_sa_events_modify(struct nb_cb_modify_args *args);
int pim_msdp_shutdown_modify(struct nb_cb_modify_args *args);
int pim_msdp_mesh_group_create(struct nb_cb_create_args *args);
int pim_msdp_mesh_group_destroy(struct nb_cb_destroy_args *args);
int pim_msdp_mesh_group_members_create(struct nb_cb_create_args *args);

27
pimd/pim_nb_config.c
View file

@ -1098,6 +1098,7 @@ pim6_msdp_err(pim_msdp_peer_authentication_key_modify, nb_cb_modify_args);
pim6_msdp_err(pim_msdp_peer_authentication_key_destroy, nb_cb_destroy_args);
pim6_msdp_err(pim_msdp_log_neighbor_events_modify, nb_cb_modify_args);
pim6_msdp_err(pim_msdp_log_sa_events_modify, nb_cb_modify_args);
pim6_msdp_err(pim_msdp_shutdown_modify, nb_cb_modify_args);
#if PIM_IPV != 6
/*
@ -1158,6 +1159,32 @@ int pim_msdp_log_sa_events_modify(struct nb_cb_modify_args *args)
return NB_OK;
}
/*
* XPath:
* /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp/shutdown
*/
int pim_msdp_shutdown_modify(struct nb_cb_modify_args *args)
{
struct pim_instance *pim;
struct vrf *vrf;
switch (args->event) {
case NB_EV_VALIDATE:
case NB_EV_PREPARE:
case NB_EV_ABORT:
/* NOTHING */
break;
case NB_EV_APPLY:
vrf = nb_running_get_entry(args->dnode, NULL, true);
pim = vrf->info;
pim_msdp_shutdown(pim, yang_dnode_get_bool(args->dnode, NULL));
break;
}
return NB_OK;
}
/*
* XPath:
* /frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-pim:pim/address-family/msdp-mesh-groups

7
yang/frr-pim.yang
View file

@ -264,6 +264,13 @@ module frr-pim {
description
"Log all MSDP SA related events.";
}
leaf shutdown {
type boolean;
default false;
description
"Shutdown MSDP functionality.";
}
}
list msdp-mesh-groups {