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extmod/nimble: Reset NimBLE BSS in mp_bluetooth_init. 

Without this fix, each time service registration happened it would do an
increasingly large malloc() for service state.

See https://github.com/apache/mynewt-nimble/issues/896.
This commit is contained in:
Jim Mussared 2020-12-21 17:31:12 +11:00 committed by Damien George
parent 069557edef
commit f42a190247
1 changed files with 29 additions and 6 deletions
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27
extmod/nimble/modbluetooth_nimble.c
View File

@ -476,11 +476,27 @@ void mp_bluetooth_nimble_port_shutdown(void) {
#endif // !MICROPY_BLUETOOTH_NIMBLE_BINDINGS_ONLY
void nimble_reset_gatts_bss(void) {
// NimBLE assumes that service registration only ever happens once, so
// we need to reset service registration state from a previous stack startup.
// These variables are defined in ble_hs.c and are only ever incremented
// (during service registration) and never reset.
// See https://github.com/apache/mynewt-nimble/issues/896
extern uint16_t ble_hs_max_attrs;
extern uint16_t ble_hs_max_services;
extern uint16_t ble_hs_max_client_configs;
ble_hs_max_attrs = 0;
ble_hs_max_services = 0;
ble_hs_max_client_configs = 0;
}
int mp_bluetooth_init(void) {
DEBUG_printf("mp_bluetooth_init\n");
// Clean up if necessary.
mp_bluetooth_deinit();
nimble_reset_gatts_bss();
mp_bluetooth_nimble_ble_state = MP_BLUETOOTH_NIMBLE_BLE_STATE_STARTING;
ble_hs_cfg.reset_cb = reset_cb;
@ -775,6 +791,15 @@ int mp_bluetooth_gatts_register_service_begin(bool append) {
if (!mp_bluetooth_is_active()) {
return ERRNO_BLUETOOTH_NOT_ACTIVE;
}
if (append) {
// Don't support append yet (modbluetooth.c doesn't support it yet anyway).
// TODO: This should be possible with NimBLE.
return MP_EOPNOTSUPP;
}
nimble_reset_gatts_bss();
int ret = ble_gatts_reset();
if (ret != 0) {
return ble_hs_err_to_errno(ret);
@ -787,13 +812,11 @@ int mp_bluetooth_gatts_register_service_begin(bool append) {
ble_svc_gap_init();
ble_svc_gatt_init();
if (!append) {
// Unref any previous service definitions.
for (size_t i = 0; i < MP_STATE_PORT(bluetooth_nimble_root_pointers)->n_services; ++i) {
MP_STATE_PORT(bluetooth_nimble_root_pointers)->services[i] = NULL;
}
MP_STATE_PORT(bluetooth_nimble_root_pointers)->n_services = 0;
}
return 0;
}