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att_server: reject incoming eatt connection if outgoing connection is active

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This commit is contained in:
Matthias Ringwald 2023-07-06 11:53:01 +02:00
parent 570bdd2d21
commit 9828b48a18
1 changed files with 30 additions and 21 deletions
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51
src/ble/att_server.c
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@ -298,10 +298,6 @@ static void att_server_event_packet_handler (uint8_t packet_type, uint16_t chann
att_connection_t * att_connection; att_connection_t * att_connection;
hci_con_handle_t con_handle; hci_con_handle_t con_handle;
hci_connection_t * hci_connection; hci_connection_t * hci_connection;
#ifdef ENABLE_GATT_OVER_CLASSIC
bd_addr_t address;
btstack_linked_list_iterator_t it;
#endif
switch (packet_type) { switch (packet_type) {
@ -1507,6 +1503,8 @@ static void att_server_eatt_handler(uint8_t packet_type, uint16_t channel, uint8
att_server_eatt_bearer_t * eatt_bearer; att_server_eatt_bearer_t * eatt_bearer;
att_server_t * att_server; att_server_t * att_server;
att_connection_t * att_connection; att_connection_t * att_connection;
hci_con_handle_t con_handle;
hci_connection_t * hci_connection;
switch (packet_type) { switch (packet_type) {
@ -1543,24 +1541,35 @@ static void att_server_eatt_handler(uint8_t packet_type, uint16_t channel, uint8
case L2CAP_EVENT_ECBM_INCOMING_CONNECTION: case L2CAP_EVENT_ECBM_INCOMING_CONNECTION:
cid = l2cap_event_ecbm_incoming_connection_get_local_cid(packet); cid = l2cap_event_ecbm_incoming_connection_get_local_cid(packet);
num_requested_bearers = l2cap_event_ecbm_incoming_connection_get_num_channels(packet);
for (i = 0; i < num_requested_bearers; i++){ // reject if outgoing l2cap connection active, L2CAP/TIM/BV-01-C
eatt_bearers[i] = (att_server_eatt_bearer_t *) btstack_linked_list_pop(&att_server_eatt_bearer_pool); con_handle = l2cap_event_ecbm_incoming_connection_get_handle(packet);
if (eatt_bearers[i] == NULL) { hci_connection = hci_connection_for_handle(con_handle);
break; btstack_assert(hci_connection != NULL);
if (hci_connection->att_server.eatt_outgoing_active) {
hci_connection->att_server.incoming_connection_request = true;
l2cap_ecbm_decline_channels(cid, L2CAP_ECBM_CONNECTION_RESULT_SOME_REFUSED_INSUFFICIENT_RESOURCES_AVAILABLE );
log_info("Decline incoming connection from %s", bd_addr_to_str(hci_connection->address));
} else {
num_requested_bearers = l2cap_event_ecbm_incoming_connection_get_num_channels(packet);
for (i = 0; i < num_requested_bearers; i++){
eatt_bearers[i] = (att_server_eatt_bearer_t *) btstack_linked_list_pop(&att_server_eatt_bearer_pool);
if (eatt_bearers[i] == NULL) {
break;
}
eatt_bearers[i]->att_connection.con_handle = l2cap_event_ecbm_incoming_connection_get_handle(packet);
eatt_bearers[i]->att_server.bearer_type = ATT_BEARER_ENHANCED_LE;
receive_buffers[i] = eatt_bearers[i]->receive_buffer;
btstack_linked_list_add(&att_server_eatt_bearer_active, (btstack_linked_item_t *) eatt_bearers[i]);
}
num_accepted_bearers = i;
status = l2cap_ecbm_accept_channels(cid, num_accepted_bearers, initial_credits, att_server_eatt_receive_buffer_size, receive_buffers, cids);
btstack_assert(status == ERROR_CODE_SUCCESS);
log_info("requested %u, accepted %u", num_requested_bearers, num_accepted_bearers);
for (i=0;i<num_accepted_bearers;i++){
log_info("eatt l2cap cid: 0x%04x", cids[i]);
eatt_bearers[i]->att_server.l2cap_cid = cids[i];
} }
eatt_bearers[i]->att_connection.con_handle = l2cap_event_ecbm_incoming_connection_get_handle(packet);
eatt_bearers[i]->att_server.bearer_type = ATT_BEARER_ENHANCED_LE;
receive_buffers[i] = eatt_bearers[i]->receive_buffer;
btstack_linked_list_add(&att_server_eatt_bearer_active, (btstack_linked_item_t *) eatt_bearers[i]);
}
num_accepted_bearers = i;
status = l2cap_ecbm_accept_channels(cid, num_accepted_bearers, initial_credits, att_server_eatt_receive_buffer_size, receive_buffers, cids);
btstack_assert(status == ERROR_CODE_SUCCESS);
log_info("requested %u, accepted %u", num_requested_bearers, num_accepted_bearers);
for (i=0;i<num_accepted_bearers;i++){
log_info("eatt l2cap cid: 0x%04x", cids[i]);
eatt_bearers[i]->att_server.l2cap_cid = cids[i];
} }
break; break;