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l2cap-ertm: fallback to basic mode if remote doesn't indicate support for ertm in information response

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This commit is contained in:
Matthias Ringwald 2017-07-12 13:06:18 +02:00
parent f2fa388d63
commit f073f0868e
1 changed files with 13 additions and 8 deletions
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21
src/l2cap.c
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@ -1771,14 +1771,19 @@ static void l2cap_signaling_handler_dispatch( hci_con_handle_t handle, uint8_t *
if (channel->con_handle != handle) continue;
// bail if ERTM was requested but is not supported
if ((channel->mode == L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION) && ((connection->l2cap_state.extended_feature_mask & 0x08) == 0)){
// channel closed
channel->state = L2CAP_STATE_CLOSED;
// map l2cap connection response result to BTstack status enumeration
l2cap_emit_channel_opened(channel, L2CAP_CONNECTION_RESPONSE_RESULT_ERTM_NOT_SUPPORTD);
// discard channel
btstack_linked_list_remove(&l2cap_channels, (btstack_linked_item_t *) channel);
btstack_memory_l2cap_channel_free(channel);
continue;
if (channel->ertm_mandatory){
// channel closed
channel->state = L2CAP_STATE_CLOSED;
// map l2cap connection response result to BTstack status enumeration
l2cap_emit_channel_opened(channel, L2CAP_CONNECTION_RESPONSE_RESULT_ERTM_NOT_SUPPORTD);
// discard channel
btstack_linked_list_remove(&l2cap_channels, (btstack_linked_item_t *) channel);
btstack_memory_l2cap_channel_free(channel);
continue;
} else {
// fallback to Basic mode
channel->mode = L2CAP_CHANNEL_MODE_BASIC;
}
}
// start connecting
if (channel->state == L2CAP_STATE_WAIT_OUTGOING_EXTENDED_FEATURES){