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btstack/test/avdtp/avdtp_initiator.c
Milanka Ringwald 946a37efd8 rewrite initiator
2017-01-26 00:20:42 +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_util.h"
#include "avdtp_initiator.h"
static int avdtp_initiator_send_signaling_cmd(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){
uint8_t command[2];
command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG);
command[1] = (uint8_t)identifier;
return l2cap_send(cid, command, sizeof(command));
}
static int avdtp_initiator_send_signaling_cmd_with_seid(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label, uint8_t sep_id){
uint8_t command[3];
command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG);
command[1] = (uint8_t)identifier;
command[2] = sep_id << 2;
return l2cap_send(cid, command, sizeof(command));
}
static void avdtp_signaling_emit_media_codec_capability(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_sep_t sep){
if (get_bit16(sep.registered_service_categories, AVDTP_MEDIA_CODEC)){
switch (sep.capabilities.media_codec.media_codec_type){
case AVDTP_CODEC_SBC:
avdtp_signaling_emit_media_codec_sbc_capability(callback, con_handle, sep.capabilities.media_codec);
break;
default:
avdtp_signaling_emit_media_codec_other_capability(callback, con_handle, sep.capabilities.media_codec);
break;
}
}
}
static void avdtp_signaling_emit_media_codec_configuration(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_sep_t sep){
if (get_bit16(sep.registered_service_categories, AVDTP_MEDIA_CODEC)){
switch (sep.capabilities.media_codec.media_codec_type){
case AVDTP_CODEC_SBC:
avdtp_signaling_emit_media_codec_sbc_configuration(callback, con_handle, sep.capabilities.media_codec);
break;
default:
avdtp_signaling_emit_media_codec_other_configuration(callback, con_handle, sep.capabilities.media_codec);
break;
}
}
}
void avdtp_initiator_stream_config_subsm(avdtp_connection_t * connection, uint8_t *packet, uint16_t size, int offset){
int status = 0;
avdtp_stream_endpoint_t * stream_endpoint = NULL;
uint8_t remote_sep_index;
avdtp_sep_t sep;
if (connection->initiator_connection_state == AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER) {
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE;
} else {
stream_endpoint = get_avdtp_stream_endpoint_associated_with_acp_seid(connection->acp_seid);
if (!stream_endpoint){
stream_endpoint = get_avdtp_stream_endpoint_with_seid(connection->int_seid);
}
if (!stream_endpoint) return;
sep.seid = connection->acp_seid;
printf("avdtp_initiator_stream_config_subsm int seid %d, acp seid %d, ident %d \n", connection->int_seid, connection->acp_seid, connection->signaling_packet.signal_identifier);
if (stream_endpoint->initiator_config_state != AVDTP_INITIATOR_W4_ANSWER) return;
stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE;
}
switch (connection->signaling_packet.message_type){
case AVDTP_RESPONSE_ACCEPT_MSG:
printf(" INT: AVDTP_RESPONSE_ACCEPT_MSG: ");
switch (connection->signaling_packet.signal_identifier){
case AVDTP_SI_DISCOVER:{
printf("AVDTP_SI_DISCOVER\n");
if (connection->signaling_packet.transaction_label != connection->initiator_transaction_label){
printf(" unexpected transaction label, got %d, expected %d\n", connection->signaling_packet.transaction_label, connection->initiator_transaction_label);
status = BAD_HEADER_FORMAT;
break;
}
if (size == 3){
printf(" ERROR code %02x\n", packet[offset]);
status = packet[offset];
break;
}
int i;
for (i = offset; i < size; i += 2){
sep.seid = packet[i] >> 2;
offset++;
if (sep.seid < 0x01 || sep.seid > 0x3E){
printf(" invalid sep id\n");
status = BAD_ACP_SEID;
break;
}
sep.in_use = (packet[i] >> 1) & 0x01;
sep.media_type = (avdtp_media_type_t)(packet[i+1] >> 4);
sep.type = (avdtp_sep_type_t)((packet[i+1] >> 3) & 0x01);
avdtp_signaling_emit_sep(avdtp_sink_callback, connection->con_handle, sep);
}
break;
}
case AVDTP_SI_GET_CAPABILITIES:
case AVDTP_SI_GET_ALL_CAPABILITIES:
printf("AVDTP_SI_GET(_ALL)_CAPABILITIES\n");
sep.registered_service_categories = avdtp_unpack_service_capabilities(connection, &sep.capabilities, packet+offset, size-offset);
avdtp_signaling_emit_media_codec_capability(avdtp_sink_callback, connection->con_handle, sep);
break;
case AVDTP_SI_GET_CONFIGURATION:
printf("AVDTP_SI_GET_CONFIGURATION\n");
sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, packet+offset, size-offset);
avdtp_signaling_emit_media_codec_configuration(avdtp_sink_callback, connection->con_handle, sep);
break;
case AVDTP_SI_RECONFIGURE:
printf("AVDTP_SI_RECONFIGURE\n");
sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, connection->signaling_packet.command+4, connection->signaling_packet.size-4);
// TODO check if configuration is supported
remote_sep_index = avdtp_get_index_of_remote_stream_endpoint_with_seid(stream_endpoint, sep.seid);
if (remote_sep_index != 0xFF){
stream_endpoint->remote_sep_index = remote_sep_index;
stream_endpoint->remote_seps[stream_endpoint->remote_sep_index] = sep;
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED;
printf(" INT: update seid %d, to %p\n", stream_endpoint->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint);
}
break;
case AVDTP_SI_SET_CONFIGURATION:{
printf("AVDTP_SI_SET_CONFIGURATION\n");
sep.configured_service_categories = connection->remote_capabilities_bitmap;
sep.configuration = connection->remote_capabilities;
sep.in_use = 1;
// TODO check if configuration is supported
// find or add sep
remote_sep_index = avdtp_get_index_of_remote_stream_endpoint_with_seid(stream_endpoint, sep.seid);
if (remote_sep_index != 0xFF){
stream_endpoint->remote_sep_index = remote_sep_index;
} else {
stream_endpoint->remote_sep_index = stream_endpoint->remote_seps_num;
stream_endpoint->remote_seps_num++;
}
stream_endpoint->remote_seps[stream_endpoint->remote_sep_index] = sep;
printf(" INT: configured seid %d, to %p\n", stream_endpoint->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint);
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED;
break;
}
case AVDTP_SI_OPEN:
printf("AVDTP_SI_OPEN\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED;
break;
case AVDTP_SI_START:
printf("AVDTP_SI_START\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING;
break;
case AVDTP_SI_SUSPEND:
printf("AVDTP_SI_SUSPEND\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED;
break;
case AVDTP_SI_CLOSE:
printf("AVDTP_SI_CLOSE\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING;
break;
case AVDTP_SI_ABORT:
printf("AVDTP_SI_ABORT\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING;
break;
default:
status = 1;
printf(" AVDTP_RESPONSE_ACCEPT_MSG, signal %d not implemented\n", connection->signaling_packet.signal_identifier);
break;
}
break;
case AVDTP_RESPONSE_REJECT_MSG:
printf(" AVDTP_RESPONSE_REJECT_MSG signal %d\n", connection->signaling_packet.signal_identifier);
avdtp_signaling_emit_reject(avdtp_sink_callback, connection->con_handle, connection->signaling_packet.signal_identifier);
return;
case AVDTP_GENERAL_REJECT_MSG:
printf(" AVDTP_GENERAL_REJECT_MSG signal %d\n", connection->signaling_packet.signal_identifier);
avdtp_signaling_emit_general_reject(avdtp_sink_callback, connection->con_handle, connection->signaling_packet.signal_identifier);
return;
default:
break;
}
connection->initiator_transaction_label++;
connection->int_seid = 0;
connection->acp_seid = 0;
avdtp_signaling_emit_accept(avdtp_sink_callback, connection->con_handle, connection->signaling_packet.signal_identifier, status);
}
void avdtp_initiator_stream_config_subsm_run(avdtp_connection_t * connection){
int sent = 1;
switch (connection->initiator_connection_state){
case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS:
printf(" INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS\n");
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER;
avdtp_initiator_send_signaling_cmd(connection->l2cap_signaling_cid, AVDTP_SI_DISCOVER, connection->initiator_transaction_label);
break;
case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES:
printf(" INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES\n");
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CAPABILITIES, connection->initiator_transaction_label, connection->acp_seid);
break;
case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES:
printf(" INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES\n");
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_ALL_CAPABILITIES, connection->initiator_transaction_label, connection->acp_seid);
break;
case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION:
printf(" INT: AVDTP_INITIATOR_W4_GET_CONFIGURATION\n");
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CONFIGURATION, connection->initiator_transaction_label, connection->acp_seid);
break;
default:
sent = 0;
break;
}
if (sent) return;
sent = 1;
avdtp_stream_endpoint_t * stream_endpoint = NULL;
printf(" run int seid %d, acp seid %d\n", connection->int_seid, connection->acp_seid);
stream_endpoint = get_avdtp_stream_endpoint_associated_with_acp_seid(connection->acp_seid);
if (!stream_endpoint){
stream_endpoint = get_avdtp_stream_endpoint_with_seid(connection->int_seid);
}
if (!stream_endpoint) return;
avdtp_initiator_stream_endpoint_state_t stream_endpoint_state = stream_endpoint->initiator_config_state;
stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER;
switch (stream_endpoint_state){
case AVDTP_INITIATOR_W2_SET_CONFIGURATION:
case AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID:{
printf(" INT: AVDTP_INITIATOR_W2_(RE)CONFIGURATION bitmap, int seid %d, acp seid %d\n", connection->int_seid, connection->acp_seid);
printf_hexdump( connection->remote_capabilities.media_codec.media_codec_information, connection->remote_capabilities.media_codec.media_codec_information_len);
connection->signaling_packet.acp_seid = connection->acp_seid;
connection->signaling_packet.int_seid = connection->int_seid;
connection->signaling_packet.signal_identifier = AVDTP_SI_SET_CONFIGURATION;
if (stream_endpoint_state == AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID){
connection->signaling_packet.signal_identifier = AVDTP_SI_RECONFIGURE;
}
avdtp_prepare_capabilities(&connection->signaling_packet, connection->initiator_transaction_label, connection->remote_capabilities_bitmap, connection->remote_capabilities, connection->signaling_packet.signal_identifier);
l2cap_reserve_packet_buffer();
uint8_t * out_buffer = l2cap_get_outgoing_buffer();
uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->signaling_packet, out_buffer);
if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){
stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND;
printf(" INT: fragmented\n");
}
l2cap_send_prepared(connection->l2cap_signaling_cid, pos);
break;
}
case AVDTP_INITIATOR_FRAGMENTATED_COMMAND:{
l2cap_reserve_packet_buffer();
uint8_t * out_buffer = l2cap_get_outgoing_buffer();
uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->signaling_packet, out_buffer);
if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){
stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND;
printf(" INT: fragmented\n");
}
l2cap_send_prepared(connection->l2cap_signaling_cid, pos);
break;
}
case AVDTP_INITIATOR_W2_MEDIA_CONNECT:
printf(" INT: AVDTP_INITIATOR_W4_L2CAP_FOR_MEDIA_CONNECTED\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_OPEN, connection->initiator_transaction_label, connection->acp_seid);
break;
case AVDTP_INITIATOR_W2_SUSPEND_STREAM_WITH_SEID:
printf(" INT: AVDTP_INITIATOR_W4_SUSPEND_STREAM_WITH_SEID\n");
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_SUSPEND, connection->initiator_transaction_label, connection->acp_seid);
break;
case AVDTP_INITIATOR_W2_STREAMING_START:
printf(" INT: AVDTP_INITIATOR_W4_STREAMING_START\n");
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_START, connection->initiator_transaction_label, connection->acp_seid);
break;
case AVDTP_INITIATOR_W2_STREAMING_STOP:
printf(" INT: AVDTP_INITIATOR_W4_STREAMING_STOP\n");
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_CLOSE, connection->initiator_transaction_label, connection->acp_seid);
break;
case AVDTP_INITIATOR_W2_STREAMING_ABORT:
printf(" INT: AVDTP_INITIATOR_W4_STREAMING_ABORT\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_ABORT, connection->initiator_transaction_label, connection->acp_seid);
break;
default:
break;
}
// check fragmentation
if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){
avdtp_sink_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
}
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