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gatt_client: handle l2cap mtu

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This commit is contained in:
Matthias Ringwald 2023-04-11 12:45:06 +02:00
parent 1aa9e3e881
commit ac4c2bc67d
1 changed files with 16 additions and 11 deletions
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27
src/ble/gatt_client.c
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@ -1419,19 +1419,28 @@ static void gatt_client_handle_att_response(gatt_client_t * gatt_client, uint8_t
switch (packet[0]) {
case ATT_EXCHANGE_MTU_RESPONSE: {
if (size < 3u) break;
bool update_att_mtu = true;
uint16_t remote_rx_mtu = little_endian_read_16(packet, 1);
uint16_t local_rx_mtu = l2cap_max_le_mtu();
#ifdef ENABLE_GATT_OVER_CLASSIC
if (gatt_client->l2cap_psm != 0){
local_rx_mtu = gatt_client->mtu;
} else {
update_att_mtu = false;
}
#endif
uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu;
// set gatt client mtu
gatt_client->mtu = mtu;
gatt_client->mtu_state = MTU_EXCHANGED;
// set per connection mtu state - for fixed channel
hci_connection_t *hci_connection = hci_connection_for_handle(gatt_client->con_handle);
hci_connection->att_connection.mtu = gatt_client->mtu;
hci_connection->att_connection.mtu_exchanged = true;
if (update_att_mtu){
// set per connection mtu state - for fixed channel
hci_connection_t *hci_connection = hci_connection_for_handle(gatt_client->con_handle);
hci_connection->att_connection.mtu = gatt_client->mtu;
hci_connection->att_connection.mtu_exchanged = true;
}
emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu);
break;
}
@ -2698,6 +2707,7 @@ static void gatt_client_l2cap_handler(uint8_t packet_type, uint16_t channel, uin
gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_opened_get_local_cid(packet));
btstack_assert(gatt_client != NULL);
gatt_client->con_handle = l2cap_event_channel_opened_get_handle(packet);
gatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet);
gatt_client_classic_handle_connected(gatt_client, status);
case L2CAP_EVENT_CHANNEL_CLOSED:
// TODO:
@ -2708,7 +2718,6 @@ static void gatt_client_l2cap_handler(uint8_t packet_type, uint16_t channel, uin
break;
case L2CAP_DATA_PACKET:
gatt_client = gatt_client_get_context_for_l2cap_cid(channel);
gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_opened_get_local_cid(packet));
btstack_assert(gatt_client != NULL);
log_info("l2cap data received");
break;
@ -2815,11 +2824,7 @@ uint8_t gatt_client_classic_connect(btstack_packet_handler_t callback, bd_addr_t
memcpy(gatt_client->addr, addr, 6);
gatt_client->mtu = ATT_DEFAULT_MTU;
gatt_client->security_level = LEVEL_0;
if (gatt_client_mtu_exchange_enabled){
gatt_client->mtu_state = SEND_MTU_EXCHANGE;
} else {
gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED;
}
gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED;
gatt_client->gatt_client_state = P_W2_SDP_QUERY;
gatt_client->sdp_query_request.callback = &gatt_client_classic_sdp_start;
gatt_client->sdp_query_request.context = gatt_client;