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btstack/test/avdtp/avdtp_sink.c
Milanka Ringwald 4894bf58ce remove set connection
2017-01-17 16:58:14 +01:00

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/*
* Copyright (C) 2016 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "btstack.h"
#include "avdtp.h"
#include "avdtp_sink.h"
#include "avdtp_util.h"
#include "avdtp_initiator.h"
#include "avdtp_acceptor.h"
static const char * default_avdtp_sink_service_name = "BTstack AVDTP Sink Service";
static const char * default_avdtp_sink_service_provider_name = "BTstack AVDTP Sink Service Provider";
// TODO list of devices
static btstack_linked_list_t avdtp_connections;
static uint16_t stream_endpoints_id_counter;
btstack_linked_list_t stream_endpoints;
btstack_packet_handler_t avdtp_sink_callback;
static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static void (*handle_media_data)(avdtp_stream_endpoint_t * stream_endpoint, uint8_t *packet, uint16_t size);
void a2dp_sink_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){
uint8_t* attribute;
de_create_sequence(service);
// 0x0000 "Service Record Handle"
de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle);
de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle);
// 0x0001 "Service Class ID List"
de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList);
attribute = de_push_sequence(service);
{
de_add_number(attribute, DE_UUID, DE_SIZE_16, AUDIO_SINK_GROUP);
}
de_pop_sequence(service, attribute);
// 0x0004 "Protocol Descriptor List"
de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList);
attribute = de_push_sequence(service);
{
uint8_t* l2cpProtocol = de_push_sequence(attribute);
{
de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol);
de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, PSM_AVDTP);
}
de_pop_sequence(attribute, l2cpProtocol);
uint8_t* avProtocol = de_push_sequence(attribute);
{
de_add_number(avProtocol, DE_UUID, DE_SIZE_16, PSM_AVDTP); // avProtocol_service
de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version
}
de_pop_sequence(attribute, avProtocol);
}
de_pop_sequence(service, attribute);
// 0x0005 "Public Browse Group"
de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group
attribute = de_push_sequence(service);
{
de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup);
}
de_pop_sequence(service, attribute);
// 0x0009 "Bluetooth Profile Descriptor List"
de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList);
attribute = de_push_sequence(service);
{
uint8_t *a2dProfile = de_push_sequence(attribute);
{
de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, ADVANCED_AUDIO_DISTRIBUTION);
de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103);
}
de_pop_sequence(attribute, a2dProfile);
}
de_pop_sequence(service, attribute);
// 0x0100 "Service Name"
de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100);
if (service_name){
de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name);
} else {
de_add_data(service, DE_STRING, strlen(default_avdtp_sink_service_name), (uint8_t *) default_avdtp_sink_service_name);
}
// 0x0100 "Provider Name"
de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102);
if (service_provider_name){
de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name);
} else {
de_add_data(service, DE_STRING, strlen(default_avdtp_sink_service_provider_name), (uint8_t *) default_avdtp_sink_service_provider_name);
}
// 0x0311 "Supported Features"
de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311);
de_add_number(service, DE_UINT, DE_SIZE_16, supported_features);
}
static avdtp_connection_t * avdtp_sink_create_connection(bd_addr_t remote_addr){
avdtp_connection_t * connection = btstack_memory_avdtp_connection_get();
memset(connection, 0, sizeof(avdtp_connection_t));
connection->state = AVDTP_SIGNALING_CONNECTION_IDLE;
connection->initiator_transaction_label++;
memcpy(connection->remote_addr, remote_addr, 6);
btstack_linked_list_add(&avdtp_connections, (btstack_linked_item_t *) connection);
return connection;
}
uint8_t avdtp_sink_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type){
avdtp_stream_endpoint_t * stream_endpoint = btstack_memory_avdtp_stream_endpoint_get();
memset(stream_endpoint, 0, sizeof(avdtp_stream_endpoint_t));
stream_endpoints_id_counter++;
stream_endpoint->sep.seid = stream_endpoints_id_counter;
stream_endpoint->sep.media_type = media_type;
stream_endpoint->sep.type = sep_type;
btstack_linked_list_add(&stream_endpoints, (btstack_linked_item_t *) stream_endpoint);
return stream_endpoint->sep.seid;
}
void avdtp_sink_register_media_transport_category(uint8_t seid){
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint){
log_error("avdtp_sink_register_media_transport_category: stream endpoint with seid %d is not registered", seid);
return;
}
uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_TRANSPORT, 1);
stream_endpoint->sep.registered_service_categories = bitmap;
printf("registered services AVDTP_MEDIA_TRANSPORT(%d) %02x\n", AVDTP_MEDIA_TRANSPORT, stream_endpoint->sep.registered_service_categories);
}
void avdtp_sink_register_reporting_category(uint8_t seid){
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint){
log_error("avdtp_sink_register_media_transport_category: stream endpoint with seid %d is not registered", seid);
return;
}
uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_REPORTING, 1);
stream_endpoint->sep.registered_service_categories = bitmap;
}
void avdtp_sink_register_delay_reporting_category(uint8_t seid){
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint){
log_error("avdtp_sink_register_media_transport_category: stream endpoint with seid %d is not registered", seid);
return;
}
uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_DELAY_REPORTING, 1);
stream_endpoint->sep.registered_service_categories = bitmap;
}
void avdtp_sink_register_recovery_category(uint8_t seid, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint){
log_error("avdtp_sink_register_media_transport_category: stream endpoint with seid %d is not registered", seid);
return;
}
uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_RECOVERY, 1);
stream_endpoint->sep.registered_service_categories = bitmap;
stream_endpoint->sep.capabilities.recovery.recovery_type = 0x01; // 0x01 = RFC2733
stream_endpoint->sep.capabilities.recovery.maximum_recovery_window_size = maximum_recovery_window_size;
stream_endpoint->sep.capabilities.recovery.maximum_number_media_packets = maximum_number_media_packets;
}
void avdtp_sink_register_content_protection_category(uint8_t seid, uint16_t cp_type, const uint8_t * cp_type_value, uint8_t cp_type_value_len){
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint){
log_error("avdtp_sink_register_media_transport_category: stream endpoint with seid %d is not registered", seid);
return;
}
uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_CONTENT_PROTECTION, 1);
stream_endpoint->sep.registered_service_categories = bitmap;
stream_endpoint->sep.capabilities.content_protection.cp_type = cp_type;
stream_endpoint->sep.capabilities.content_protection.cp_type_value = cp_type_value;
stream_endpoint->sep.capabilities.content_protection.cp_type_value_len = cp_type_value_len;
}
void avdtp_sink_register_header_compression_category(uint8_t seid, uint8_t back_ch, uint8_t media, uint8_t recovery){
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint){
log_error("avdtp_sink_register_media_transport_category: stream endpoint with seid %d is not registered", seid);
return;
}
uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_HEADER_COMPRESSION, 1);
stream_endpoint->sep.registered_service_categories = bitmap;
stream_endpoint->sep.capabilities.header_compression.back_ch = back_ch;
stream_endpoint->sep.capabilities.header_compression.media = media;
stream_endpoint->sep.capabilities.header_compression.recovery = recovery;
}
void avdtp_sink_register_media_codec_category(uint8_t seid, avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, const uint8_t * media_codec_info, uint16_t media_codec_info_len){
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint){
log_error("avdtp_sink_register_media_transport_category: stream endpoint with seid %d is not registered", seid);
return;
}
uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_CODEC, 1);
stream_endpoint->sep.registered_service_categories = bitmap;
printf("registered services AVDTP_MEDIA_CODEC(%d) %02x\n", AVDTP_MEDIA_CODEC, stream_endpoint->sep.registered_service_categories);
stream_endpoint->sep.capabilities.media_codec.media_type = media_type;
stream_endpoint->sep.capabilities.media_codec.media_codec_type = media_codec_type;
stream_endpoint->sep.capabilities.media_codec.media_codec_information = media_codec_info;
stream_endpoint->sep.capabilities.media_codec.media_codec_information_len = media_codec_info_len;
}
void avdtp_sink_register_multiplexing_category(uint8_t seid, uint8_t fragmentation){
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint){
log_error("avdtp_sink_register_media_transport_category: stream endpoint with seid %d is not registered", seid);
return;
}
uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MULTIPLEXING, 1);
stream_endpoint->sep.registered_service_categories = bitmap;
stream_endpoint->sep.capabilities.multiplexing_mode.fragmentation = fragmentation;
}
// // media, reporting. recovery
// void avdtp_sink_register_media_transport_identifier_for_multiplexing_category(uint8_t seid, uint8_t fragmentation){
// }
static avdtp_connection_t * get_avdtp_connection_for_bd_addr(bd_addr_t addr){
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avdtp_connections);
while (btstack_linked_list_iterator_has_next(&it)){
avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it);
if (memcmp(addr, connection->remote_addr, 6) != 0) continue;
return connection;
}
return NULL;
}
static avdtp_connection_t * get_avdtp_connection_for_con_handle(hci_con_handle_t con_handle){
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avdtp_connections);
while (btstack_linked_list_iterator_has_next(&it)){
avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it);
if (connection->con_handle != con_handle) continue;
return connection;
}
return NULL;
}
static avdtp_connection_t * get_avdtp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid){
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avdtp_connections);
while (btstack_linked_list_iterator_has_next(&it)){
avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it);
if (connection->l2cap_signaling_cid != l2cap_cid) continue;
return connection;
}
return NULL;
}
static avdtp_stream_endpoint_t * get_avdtp_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid){
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &stream_endpoints);
while (btstack_linked_list_iterator_has_next(&it)){
avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it);
if (stream_endpoint->l2cap_media_cid == l2cap_cid){
return stream_endpoint;
}
if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){
return stream_endpoint;
}
if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){
return stream_endpoint;
}
}
return NULL;
}
/* START: tracking can send now requests pro l2cap cid */
static void avdtp_sink_handle_can_send_now(avdtp_connection_t * connection, uint16_t l2cap_cid){
if (connection->wait_to_send_acceptor){
connection->wait_to_send_acceptor = 0;
avdtp_acceptor_stream_config_subsm_run(connection);
} else if (connection->wait_to_send_initiator){
connection->wait_to_send_initiator = 0;
avdtp_initiator_stream_config_subsm_run(connection);
} else if (connection->wait_to_send_self){
connection->wait_to_send_self = 0;
if (connection->disconnect){
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &stream_endpoints);
while (btstack_linked_list_iterator_has_next(&it)){
avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it);
if (stream_endpoint->connection == connection){
if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_OPENED && stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED){
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED;
avdtp_sink_request_can_send_now_self(connection, connection->l2cap_signaling_cid);
l2cap_disconnect(stream_endpoint->l2cap_media_cid, 0);
return;
}
}
}
connection->disconnect = 0;
connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED;
l2cap_disconnect(connection->l2cap_signaling_cid, 0);
return;
}
}
// re-register
int more_to_send = connection->wait_to_send_acceptor || connection->wait_to_send_initiator || connection->wait_to_send_self;
if (more_to_send){
l2cap_request_can_send_now_event(l2cap_cid);
}
}
/* END: tracking can send now requests pro l2cap cid */
// TODO remove
static void handle_l2cap_data_packet_for_signaling_connection(avdtp_connection_t * connection, uint8_t *packet, uint16_t size){
int offset = avdtp_read_signaling_header(&connection->signaling_packet, packet, size);
switch (connection->signaling_packet.message_type){
case AVDTP_CMD_MSG:
avdtp_acceptor_stream_config_subsm(connection, packet, size, offset);
break;
default:
avdtp_initiator_stream_config_subsm(connection, packet, size, offset);
break;
}
}
static void stream_endpoint_state_machine(avdtp_connection_t * connection, avdtp_stream_endpoint_t * stream_endpoint, uint8_t packet_type, uint8_t event, uint8_t *packet, uint16_t size){
uint16_t local_cid;
switch (packet_type){
case L2CAP_DATA_PACKET:{
int offset = avdtp_read_signaling_header(&connection->signaling_packet, packet, size);
if (connection->signaling_packet.message_type == AVDTP_CMD_MSG){
avdtp_acceptor_stream_config_subsm(connection, packet, size, offset);
} else {
avdtp_initiator_stream_config_subsm(connection, packet, size, offset);
}
break;
}
case HCI_EVENT_PACKET:
switch (event){
case L2CAP_EVENT_CHANNEL_OPENED:
if (stream_endpoint->l2cap_media_cid == 0){
if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED) return;
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED;
stream_endpoint->connection = connection;
stream_endpoint->l2cap_media_cid = l2cap_event_channel_opened_get_local_cid(packet);;
printf(" -> AVDTP_STREAM_ENDPOINT_OPENED, stream endpoint %p, connection %p\n", stream_endpoint, connection);
break;
}
break;
case L2CAP_EVENT_CHANNEL_CLOSED:
local_cid = l2cap_event_channel_closed_get_local_cid(packet);
if (stream_endpoint->l2cap_media_cid == local_cid){
stream_endpoint->l2cap_media_cid = 0;
printf(" -> L2CAP_EVENT_CHANNEL_CLOSED: AVDTP_STREAM_ENDPOINT_IDLE\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE;
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE;
stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE;
stream_endpoint->remote_seps_num = 0;
memset(stream_endpoint->remote_seps, 0, sizeof(avdtp_sep_t)*MAX_NUM_SEPS);
stream_endpoint->remote_sep_index = 0;
break;
}
if (stream_endpoint->l2cap_recovery_cid == local_cid){
log_info(" -> L2CAP_EVENT_CHANNEL_CLOSED recovery cid 0x%0x", local_cid);
stream_endpoint->l2cap_recovery_cid = 0;
break;
}
if (stream_endpoint->l2cap_reporting_cid == local_cid){
log_info("L2CAP_EVENT_CHANNEL_CLOSED reporting cid 0x%0x", local_cid);
stream_endpoint->l2cap_reporting_cid = 0;
break;
}
break;
default:
break;
}
break;
default:
break;
}
}
static void avdtp_initialize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){
stream_endpoint->connection = NULL;
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE;
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE;
stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE;
stream_endpoint->remote_sep_index = 0;
stream_endpoint->media_disconnect = 0;
stream_endpoint->remote_seps_num = 0;
stream_endpoint->sep.in_use = 0;
memset(stream_endpoint->remote_seps, 0, sizeof(stream_endpoint->remote_seps));
stream_endpoint->remote_sep_index = 0;
}
static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
bd_addr_t event_addr;
hci_con_handle_t con_handle;
uint16_t psm;
uint16_t local_cid;
avdtp_stream_endpoint_t * stream_endpoint = NULL;
avdtp_connection_t * connection = NULL;
switch (packet_type) {
case L2CAP_DATA_PACKET:
connection = get_avdtp_connection_for_l2cap_signaling_cid(channel);
if (connection){
handle_l2cap_data_packet_for_signaling_connection(connection, packet, size);
break;
}
stream_endpoint = get_avdtp_stream_endpoint_for_l2cap_cid(channel);
if (!stream_endpoint){
if (!connection) break;
handle_l2cap_data_packet_for_signaling_connection(connection, packet, size);
break;
}
if (channel == stream_endpoint->connection->l2cap_signaling_cid){
stream_endpoint_state_machine(stream_endpoint->connection, stream_endpoint, L2CAP_DATA_PACKET, 0, packet, size);
break;
}
if (channel == stream_endpoint->l2cap_media_cid){
(*handle_media_data)(stream_endpoint, packet, size);
break;
}
if (channel == stream_endpoint->l2cap_reporting_cid){
// TODO
printf("L2CAP_DATA_PACKET for reporting: NOT IMPLEMENTED\n");
} else if (channel == stream_endpoint->l2cap_recovery_cid){
// TODO
printf("L2CAP_DATA_PACKET for recovery: NOT IMPLEMENTED\n");
} else {
log_error("avdtp packet handler L2CAP_DATA_PACKET: local cid 0x%02x not found", channel);
}
break;
case HCI_EVENT_PACKET:
switch (hci_event_packet_get_type(packet)) {
case L2CAP_EVENT_INCOMING_CONNECTION:
l2cap_event_incoming_connection_get_address(packet, event_addr);
local_cid = l2cap_event_incoming_connection_get_local_cid(packet);
connection = get_avdtp_connection_for_bd_addr(event_addr);
if (!connection){
connection = avdtp_sink_create_connection(event_addr);
connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED;
l2cap_accept_connection(local_cid);
break;
}
stream_endpoint = get_avdtp_stream_endpoint_for_seid(connection->query_seid);
if (!stream_endpoint) {
printf("L2CAP_EVENT_INCOMING_CONNECTION no streamendpoint found for seid %d\n", connection->query_seid);
break;
}
if (stream_endpoint->l2cap_media_cid == 0){
if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED) break;
l2cap_accept_connection(local_cid);
break;
}
break;
case L2CAP_EVENT_CHANNEL_OPENED:
// inform about new l2cap connection
l2cap_event_channel_opened_get_address(packet, event_addr);
if (l2cap_event_channel_opened_get_status(packet)){
log_error("L2CAP connection to connection %s failed. status code 0x%02x",
bd_addr_to_str(event_addr), l2cap_event_channel_opened_get_status(packet));
break;
}
psm = l2cap_event_channel_opened_get_psm(packet);
if (psm != PSM_AVDTP){
log_error("unexpected PSM - Not implemented yet, avdtp sink: L2CAP_EVENT_CHANNEL_OPENED");
return;
}
con_handle = l2cap_event_channel_opened_get_handle(packet);
local_cid = l2cap_event_channel_opened_get_local_cid(packet);
// printf("L2CAP_EVENT_CHANNEL_OPENED: Channel successfully opened: %s, handle 0x%02x, psm 0x%02x, local cid 0x%02x, remote cid 0x%02x\n",
// bd_addr_to_str(event_addr), con_handle, psm, local_cid, l2cap_event_channel_opened_get_remote_cid(packet));
if (psm != PSM_AVDTP) break;
connection = get_avdtp_connection_for_bd_addr(event_addr);
if (!connection) break;
if (connection->l2cap_signaling_cid == 0) {
if (connection->state != AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED) break;
connection->l2cap_signaling_cid = local_cid;
connection->con_handle = con_handle;
connection->query_seid = 0;
connection->state = AVDTP_SIGNALING_CONNECTION_OPENED;
printf(" -> AVDTP_SIGNALING_CONNECTION_OPENED, connection %p\n", connection);
avdtp_signaling_emit_connection_established(avdtp_sink_callback, con_handle, event_addr, 0);
break;
}
stream_endpoint = get_avdtp_stream_endpoint_for_seid(connection->query_seid);
if (!stream_endpoint){
printf("L2CAP_EVENT_CHANNEL_OPENED: stream_endpoint not found");
return;
}
stream_endpoint_state_machine(connection, stream_endpoint, HCI_EVENT_PACKET, L2CAP_EVENT_CHANNEL_OPENED, packet, size);
break;
case L2CAP_EVENT_CHANNEL_CLOSED:
// data: event (8), len(8), channel (16)
local_cid = l2cap_event_channel_closed_get_local_cid(packet);
connection = get_avdtp_connection_for_l2cap_signaling_cid(local_cid);
printf(" -> L2CAP_EVENT_CHANNEL_CLOSED signaling cid 0x%0x\n", local_cid);
if (connection){
printf(" -> AVDTP_STREAM_ENDPOINT_IDLE, connection closed\n");
btstack_linked_list_remove(&avdtp_connections, (btstack_linked_item_t*) connection);
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &stream_endpoints);
while (btstack_linked_list_iterator_has_next(&it)){
avdtp_stream_endpoint_t * _stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it);
avdtp_initialize_stream_endpoint(_stream_endpoint);
}
break;
}
stream_endpoint = get_avdtp_stream_endpoint_for_l2cap_cid(local_cid);
if (!stream_endpoint) return;
stream_endpoint_state_machine(connection, stream_endpoint, HCI_EVENT_PACKET, L2CAP_EVENT_CHANNEL_CLOSED, packet, size);
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
break;
case L2CAP_EVENT_CAN_SEND_NOW:
connection = get_avdtp_connection_for_l2cap_signaling_cid(channel);
if (!connection) {
stream_endpoint = get_avdtp_stream_endpoint_for_l2cap_cid(channel);
if (!stream_endpoint->connection) break;
connection = stream_endpoint->connection;
}
avdtp_sink_handle_can_send_now(connection, channel);
break;
default:
printf("unknown HCI event type %02x\n", hci_event_packet_get_type(packet));
break;
}
break;
default:
// other packet type
break;
}
}
// TODO: find out which security level is needed, and replace LEVEL_0 in avdtp_sink_init
void avdtp_sink_init(void){
stream_endpoints = NULL;
avdtp_connections = NULL;
stream_endpoints_id_counter = 0;
l2cap_register_service(&packet_handler, PSM_AVDTP, 0xffff, LEVEL_0);
}
void avdtp_sink_register_media_handler(void (*callback)(avdtp_stream_endpoint_t * stream_endpoint, uint8_t *packet, uint16_t size)){
if (callback == NULL){
log_error("avdtp_sink_register_media_handler called with NULL callback");
return;
}
handle_media_data = callback;
}
void avdtp_sink_register_packet_handler(btstack_packet_handler_t callback){
if (callback == NULL){
log_error("avdtp_sink_register_packet_handler called with NULL callback");
return;
}
avdtp_sink_callback = callback;
}
void avdtp_sink_connect(bd_addr_t bd_addr){
avdtp_connection_t * connection = get_avdtp_connection_for_bd_addr(bd_addr);
if (!connection){
connection = avdtp_sink_create_connection(bd_addr);
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_IDLE) return;
connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED;
l2cap_create_channel(packet_handler, connection->remote_addr, PSM_AVDTP, 0xffff, NULL);
}
void avdtp_sink_disconnect(uint16_t con_handle){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (connection->state == AVDTP_SIGNALING_CONNECTION_IDLE) return;
if (connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED) return;
connection->disconnect = 1;
avdtp_sink_request_can_send_now_self(connection, connection->l2cap_signaling_cid);
}
void avdtp_sink_open_stream(uint16_t con_handle, uint8_t seid){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_media_connect: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) {
printf("avdtp_sink_media_connect: wrong connection state %d\n", connection->state);
return;
}
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint) {
printf("avdtp_sink_media_connect: no stream_endpoint for seid %d found\n", seid);
return;
}
printf(" AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_L2CAP_FOR_MEDIA_CONNECTED \n");
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_L2CAP_FOR_MEDIA_CONNECTED;
connection->query_seid = seid;
if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_CONFIGURED){
return;
} else {
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED;
}
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
void avdtp_sink_start_stream(uint16_t con_handle, uint8_t seid){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_media_connect: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) {
printf("avdtp_sink_media_connect: wrong connection state %d\n", connection->state);
return;
}
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint) {
printf("avdtp_sink_media_connect: no stream_endpoint for seid %d found\n", seid);
return;
}
printf(" AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_L2CAP_FOR_STREAMING_STARTED \n");
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_L2CAP_FOR_STREAMING_STARTED;
connection->query_seid = seid;
if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_OPENED) return;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
void avdtp_sink_stop_stream(uint16_t con_handle, uint8_t seid){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_stop_stream: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) {
printf("avdtp_sink_stop_stream: wrong connection state %d\n", connection->state);
return;
}
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint) {
printf("avdtp_sink_stop_stream: no stream_endpoint for seid %d found\n", seid);
return;
}
switch (stream_endpoint->state){
case AVDTP_STREAM_ENDPOINT_OPENED:
case AVDTP_STREAM_ENDPOINT_STREAMING:
printf(" AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_L2CAP_FOR_STREAMING_STOPED \n");
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_L2CAP_FOR_STREAMING_STOPED;
connection->query_seid = seid;
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
break;
default:
break;
}
}
void avdtp_sink_abort_stream(uint16_t con_handle, uint8_t seid){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_abort_stream: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) {
printf("avdtp_sink_abort_stream: wrong connection state %d\n", connection->state);
return;
}
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint) {
printf("avdtp_sink_abort_stream: no stream_endpoint for seid %d found\n", seid);
return;
}
switch (stream_endpoint->state){
case AVDTP_STREAM_ENDPOINT_CONFIGURED:
case AVDTP_STREAM_ENDPOINT_CLOSING:
case AVDTP_STREAM_ENDPOINT_OPENED:
case AVDTP_STREAM_ENDPOINT_STREAMING:
printf(" AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_L2CAP_FOR_STREAMING_ABORTED \n");
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_L2CAP_FOR_STREAMING_ABORTED;
connection->query_seid = seid;
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
break;
default:
break;
}
}
void avdtp_sink_discover_stream_endpoints(uint16_t con_handle){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_discover_stream_endpoints: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return;
switch (connection->initiator_connection_state){
case AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE:
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
break;
default:
printf("avdtp_sink_discover_stream_endpoints: wrong state\n");
break;
}
}
void avdtp_sink_get_capabilities(uint16_t con_handle, uint8_t seid){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_get_capabilities: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return;
if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return;
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES;
connection->query_seid = seid;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
void avdtp_sink_get_all_capabilities(uint16_t con_handle, uint8_t seid){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_get_all_capabilities: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return;
if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return;
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES;
connection->query_seid = seid;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
void avdtp_sink_get_configuration(uint16_t con_handle, uint8_t seid){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_get_configuration: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return;
if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return;
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION;
connection->query_seid = seid;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
void avdtp_sink_set_configuration(uint16_t con_handle, uint8_t acp_seid, uint8_t int_seid, uint16_t remote_capabilities_bitmap, avdtp_capabilities_t remote_capabilities){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_set_configuration: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return;
if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SET_CAPABILITIES;
connection->initiator_transaction_label++;
connection->query_seid = acp_seid;
connection->int_seid = int_seid;
connection->remote_capabilities = remote_capabilities;
connection->remote_capabilities_bitmap = remote_capabilities_bitmap;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
void avdtp_sink_suspend(uint16_t con_handle, uint8_t seid){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_suspend: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return;
if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return;
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint) return;
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SUSPEND_STREAM_WITH_SEID;
connection->query_seid = seid;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
void avdtp_sink_reconfigure(uint16_t con_handle, uint8_t seid){
avdtp_connection_t * connection = get_avdtp_connection_for_con_handle(con_handle);
if (!connection){
printf("avdtp_sink_reconfigure: no connection for handle 0x%02x found\n", con_handle);
return;
}
if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return;
if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return;
avdtp_stream_endpoint_t * stream_endpoint = get_avdtp_stream_endpoint_for_seid(seid);
if (!stream_endpoint) return;
connection->initiator_transaction_label++;
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID;
connection->query_seid = seid;
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
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