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l2cap: send fixed channel request

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This commit is contained in:
Matthias Ringwald 2021-11-15 22:58:35 +01:00
parent 947e749bbf
commit c1c10361fb
1 changed files with 51 additions and 25 deletions
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76
src/l2cap.c
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@ -1802,16 +1802,27 @@ static bool l2ap_run_information_requests(void){
// send l2cap information request if requested
btstack_linked_list_iterator_t it;
hci_connections_get_iterator(&it);
uint8_t info_type;
l2cap_information_state_t new_state;
while(btstack_linked_list_iterator_has_next(&it)){
hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it);
if (connection->l2cap_state.information_state == L2CAP_INFORMATION_STATE_W2_SEND_EXTENDED_FEATURE_REQUEST){
if (!hci_can_send_acl_packet_now(connection->con_handle)) break;
connection->l2cap_state.information_state = L2CAP_INFORMATION_STATE_W4_EXTENDED_FEATURE_RESPONSE;
uint8_t sig_id = l2cap_next_sig_id();
uint8_t info_type = L2CAP_INFO_TYPE_EXTENDED_FEATURES_SUPPORTED;
l2cap_send_classic_signaling_packet(connection->con_handle, INFORMATION_REQUEST, sig_id, info_type);
return true;
switch (connection->l2cap_state.information_state){
case L2CAP_INFORMATION_STATE_W2_SEND_EXTENDED_FEATURE_REQUEST:
info_type = L2CAP_INFO_TYPE_EXTENDED_FEATURES_SUPPORTED;
new_state = L2CAP_INFORMATION_STATE_W4_EXTENDED_FEATURE_RESPONSE;
break;
case L2CAP_INFORMATION_STATE_W2_SEND_FIXED_CHANNELS_REQUEST:
info_type = L2CAP_INFO_TYPE_FIXED_CHANNELS_SUPPORTED;
new_state = L2CAP_INFORMATION_STATE_W4_FIXED_CHANNELS_RESPONSE;
break;
default:
continue;
}
if (!hci_can_send_acl_packet_now(connection->con_handle)) break;
connection->l2cap_state.information_state = new_state;
uint8_t sig_id = l2cap_next_sig_id();
l2cap_send_classic_signaling_packet(connection->con_handle, INFORMATION_REQUEST, sig_id, info_type);
}
return false;
}
@ -3127,7 +3138,7 @@ static void l2cap_handle_information_request_complete(hci_connection_t * connect
}
}
#endif
// respond to connection request
channel->state = L2CAP_STATE_WILL_SEND_CONNECTION_REQUEST;
continue;
@ -3178,28 +3189,43 @@ static void l2cap_signaling_handler_dispatch(hci_con_handle_t handle, uint8_t *
}
return;
#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
case INFORMATION_RESPONSE:
connection = hci_connection_for_handle(handle);
if (!connection) return;
if (connection->l2cap_state.information_state != L2CAP_INFORMATION_STATE_W4_EXTENDED_FEATURE_RESPONSE) return;
// get extended features from response if valid
connection->l2cap_state.extended_feature_mask = 0;
if (cmd_len >= 6) {
uint16_t info_type = little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET);
uint16_t result = little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+2);
if (result == 0 && info_type == L2CAP_INFO_TYPE_EXTENDED_FEATURES_SUPPORTED) {
connection->l2cap_state.extended_feature_mask = little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+4);
}
log_info("extended features mask 0x%02x", connection->l2cap_state.extended_feature_mask);
switch (connection->l2cap_state.information_state){
case L2CAP_INFORMATION_STATE_W4_EXTENDED_FEATURE_RESPONSE:
// get extended features from response if valid
if (cmd_len >= 6) {
uint16_t info_type = little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET);
uint16_t result = little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+2);
if (result == 0 && info_type == L2CAP_INFO_TYPE_EXTENDED_FEATURES_SUPPORTED) {
connection->l2cap_state.extended_feature_mask = little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+4);
}
log_info("extended features mask 0x%02x", connection->l2cap_state.extended_feature_mask);
if ((connection->l2cap_state.extended_feature_mask & 0x80) != 0){
connection->l2cap_state.information_state = L2CAP_INFORMATION_STATE_W2_SEND_FIXED_CHANNELS_REQUEST;
} else {
// information request complete
l2cap_handle_information_request_complete(connection);
}
}
break;
case L2CAP_INFORMATION_STATE_W4_FIXED_CHANNELS_RESPONSE:
if (cmd_len >= 12) {
uint16_t info_type = little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET);
uint16_t result = little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+2);
if (result == 0 && info_type == L2CAP_INFO_TYPE_FIXED_CHANNELS_SUPPORTED) {
connection->l2cap_state.fixed_channels = little_endian_read_16(command, L2CAP_SIGNALING_COMMAND_DATA_OFFSET+4);
}
log_info("fixed channels mask 0x%02x", connection->l2cap_state.fixed_channels);
// information request complete
l2cap_handle_information_request_complete(connection);
}
break;
default:
break;
}
// information request complete
l2cap_handle_information_request_complete(connection);
return;
#endif
default:
break;