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APC: relinquish DR/BDR mode on Cloud conn loss

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If there is a cloud connectivity loss, we do not
want the AP to be elected as a DR/BDR since that would
mean the APs configuration could mismatch with all the
other APs linked to it.

Signed-off-by: Chaitanya Godavarthi <chaitanya.kiran@netexperience.com>
This commit is contained in:
Chaitanya Godavarthi
2021-05-17 16:34:25 -04:00
committed by Rick Sommerville
parent acc7a24464
commit d40e1f9d13
1 changed files with 111 additions and 3 deletions
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114
feeds/wlan-ap/opensync/src/platform/openwrt/src/lib/target/src/radio.c
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@@ -35,6 +35,7 @@ ovsdb_table_t table_Hotspot20_Icon_Config;
ovsdb_table_t table_APC_Config;
ovsdb_table_t table_APC_State;
unsigned int radproxy_apc = 0;
extern json_t* ovsdb_table_where(ovsdb_table_t *table, void *record);
static struct uci_package *wireless;
struct uci_context *uci;
@@ -799,16 +800,114 @@ void apc_state_set(struct blob_attr *msg)
LOG(ERR, "APC_state: failed to update");
}
static ovsdb_table_t table_Manager;
ev_timer apc_cld_mon_timer;
ev_timer apc_cld_disconn_timer;
ev_timer apc_backoff_timer;
#define APC_CLD_MON_TIME 5
#define APC_CLD_DISCONN_TIME 60
#define APC_BKOFF_TIME 60
static void
apc_cld_mon_cb(struct ev_loop *loop, ev_timer *timer, int revents)
{
struct schema_APC_State state;
struct schema_Manager mgr;
json_t *where;
where = ovsdb_table_where(&table_APC_State, &state);
if (false == ovsdb_table_select_one_where(&table_APC_State,
where, &state)) {
LOG(ERR, "%s: APC_State read failed", __func__);
return;
}
/*If not DR and not BDR the dont proceed */
if ((strncmp(state.mode, "DR", 2) != 0) &&
(strncmp(state.mode, "BDR", 3) != 0))
return;
/*If BDR addr is 0 means its a standalone DR*/
if ((strncmp(state.bdr_addr, "0.0.0.0", 7) == 0))
return;
where = ovsdb_table_where(&table_Manager, &mgr);
if (false == ovsdb_table_select_one_where(&table_Manager,
where, &mgr)) {
LOG(ERR, "%s: Manager read failed", __func__);
return;
}
if (mgr.is_connected == false) {
if (!ev_is_active(&apc_cld_disconn_timer) &&
!ev_is_pending(&apc_cld_disconn_timer)) {
LOGI("%s: START apc_cld_disconn_timer, %s",
__func__, state.mode);
ev_timer_set(&apc_cld_disconn_timer,
APC_CLD_DISCONN_TIME, 0);
ev_timer_start(EV_DEFAULT, &apc_cld_disconn_timer);
}
}
else {
if (ev_is_active(&apc_cld_disconn_timer)) {
LOGI("%s: STOP apc_cld_disconn_timer", __func__);
ev_timer_stop(EV_DEFAULT, &apc_cld_disconn_timer);
}
}
}
static void
apc_backoff_cb(struct ev_loop *loop, ev_timer *timer, int revents)
{
LOGI("%s: Enable APC, STOP apc_backoff_timer", __func__);
SCHEMA_SET_INT(apc_conf.enabled, true);
if (!ovsdb_table_update(&table_APC_Config, &apc_conf))
LOG(ERR, "%s: APC_Config: failed to update", __func__);
ev_timer_stop(EV_DEFAULT, &apc_backoff_timer);
}
static void
apc_cld_disconn_cb(struct ev_loop *loop, ev_timer *timer, int revents)
{
LOGI("%s: Disable APC , START apc_backoff_timer", __func__);
SCHEMA_SET_INT(apc_conf.enabled, false);
if (!ovsdb_table_update(&table_APC_Config, &apc_conf)) {
LOG(ERR, "%s:APC_Config: failed to update", __func__);
ev_timer_stop(EV_DEFAULT, &apc_cld_disconn_timer);
return;
}
ev_timer_set(&apc_backoff_timer, APC_BKOFF_TIME, 0);
ev_timer_start(EV_DEFAULT, &apc_backoff_timer);
ev_timer_stop(EV_DEFAULT, &apc_cld_disconn_timer);
}
void cloud_disconn_mon(void)
{
ev_init(&apc_cld_mon_timer, apc_cld_mon_cb);
apc_cld_mon_timer.repeat = APC_CLD_MON_TIME;
ev_timer_again(EV_DEFAULT, &apc_cld_mon_timer);
ev_timer_init(&apc_cld_disconn_timer, apc_cld_disconn_cb,
APC_CLD_DISCONN_TIME, 0);
ev_timer_init(&apc_backoff_timer, apc_backoff_cb,
APC_BKOFF_TIME, 0);
OVSDB_TABLE_INIT_NO_KEY(Manager);
}
void apc_init()
{
/* APC Config */
OVSDB_TABLE_INIT(APC_Config, _uuid);
OVSDB_TABLE_INIT_NO_KEY(APC_Config);
OVSDB_TABLE_MONITOR(APC_Config, false);
SCHEMA_SET_INT(apc_conf.enabled, true);
LOGI("APC state/config Initialize");
if (!ovsdb_table_insert(&table_APC_Config, &apc_conf))
if (!ovsdb_table_insert(&table_APC_Config, &apc_conf)) {
LOG(ERR, "APC_Config: failed to initialize");
return;
}
/* APC State */
OVSDB_TABLE_INIT_NO_KEY(APC_State);
@@ -817,8 +916,17 @@ void apc_init()
SCHEMA_SET_STR(apc_state.dr_addr, "0.0.0.0");
SCHEMA_SET_STR(apc_state.bdr_addr, "0.0.0.0");
SCHEMA_SET_INT(apc_state.enabled, false);
if (!ovsdb_table_insert(&table_APC_State, &apc_state))
if (!ovsdb_table_insert(&table_APC_State, &apc_state)) {
LOG(ERR, "APC_state: failed to initialize");
return;
}
/* Cloud connection monitor - if cloud unreachable
* for certain time, disable APC and enable after a
* back-off time. This triggers relection of DR among
* other APs*/
cloud_disconn_mon();
}
bool target_radio_init(const struct target_radio_ops *ops)