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btstack/test/avdtp/avdtp_acceptor.c
Milanka Ringwald d9a4dc23da fix unpack capabilities
2016-12-08 15:28:06 +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_acceptor.h"
static int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){
int i;
// pos = 0 reserved for length
int pos = 1;
switch(category){
case AVDTP_MEDIA_TRANSPORT:
case AVDTP_REPORTING:
break;
case AVDTP_DELAY_REPORTING:
if (!pack_all_capabilities) break;
break;
case AVDTP_RECOVERY:
buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733
buffer[pos++] = caps.recovery.maximum_recovery_window_size;
buffer[pos++] = caps.recovery.maximum_number_media_packets;
break;
case AVDTP_CONTENT_PROTECTION:
buffer[pos++] = caps.content_protection.cp_type_lsb;
buffer[pos++] = caps.content_protection.cp_type_msb;
// if (caps.content_protection.cp_type_value_len == 0){
// buffer[pos++] = 0;
// }
for (i = 0; i<caps.content_protection.cp_type_value_len; i++){
buffer[pos++] = caps.content_protection.cp_type_value[i];
}
printf("AVDTP_CONTENT_PROTECTION %d, %d \n", caps.content_protection.cp_type_lsb, caps.content_protection.cp_type_msb);
break;
case AVDTP_HEADER_COMPRESSION:
buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5);
break;
case AVDTP_MULTIPLEXING:
buffer[pos++] = caps.multiplexing_mode.fragmentation << 7;
for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){
buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7;
buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7;
// media, reporting. recovery
}
break;
case AVDTP_MEDIA_CODEC:
buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4;
buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type;
for (i = 0; i<caps.media_codec.media_codec_information_len; i++){
buffer[pos++] = caps.media_codec.media_codec_information[i];
}
break;
}
buffer[0] = pos - 1; // length
return pos;
}
static uint16_t avdtp_unpack_service_capabilities(avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){
int pos = 0;
uint16_t registered_service_categories = 0;
avdtp_service_category_t category = (avdtp_service_category_t)packet[pos++];
uint8_t cap_len = packet[pos++];
int i;
while (pos < size){
switch(category){
case AVDTP_MEDIA_TRANSPORT:
case AVDTP_REPORTING:
case AVDTP_DELAY_REPORTING:
pos++;
break;
case AVDTP_RECOVERY:
caps->recovery.recovery_type = packet[pos++];
caps->recovery.maximum_recovery_window_size = packet[pos++];
caps->recovery.maximum_number_media_packets = packet[pos++];
break;
case AVDTP_CONTENT_PROTECTION:
caps->content_protection.cp_type_lsb = packet[pos++];
caps->content_protection.cp_type_msb = packet[pos++];
caps->content_protection.cp_type_value_len = cap_len - 2;
printf_hexdump(packet+pos, caps->content_protection.cp_type_value_len);
pos += caps->content_protection.cp_type_value_len;
break;
case AVDTP_HEADER_COMPRESSION:
caps->header_compression.back_ch = packet[pos] >> 7;
caps->header_compression.media = packet[pos] >> 6;
caps->header_compression.recovery = packet[pos] >> 5;
pos++;
break;
case AVDTP_MULTIPLEXING:
caps->multiplexing_mode.fragmentation = packet[pos++] >> 7;
// read [tsid, tcid] for media, reporting. recovery respectively
caps->multiplexing_mode.transport_identifiers_num = 3;
for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){
caps->multiplexing_mode.transport_session_identifiers[i] = packet[pos++] >> 7;
caps->multiplexing_mode.tcid[i] = packet[pos++] >> 7;
}
break;
case AVDTP_MEDIA_CODEC:
caps->media_codec.media_type = packet[pos++] >> 4;
caps->media_codec.media_codec_type = packet[pos++];
caps->media_codec.media_codec_information_len = cap_len - 2;
printf_hexdump(packet+pos, caps->media_codec.media_codec_information_len);
pos += caps->media_codec.media_codec_information_len;
break;
}
registered_service_categories = store_bit16(registered_service_categories, category, 1);
}
return registered_service_categories;
}
static inline int avdtp_acceptor_send_capabilities(uint16_t cid, uint8_t transaction_label, avdtp_sep_t sep, uint8_t identifier){
uint8_t command[100];
uint8_t pack_all_capabilities = 1;
if (identifier == AVDTP_SI_GET_CAPABILITIES){
pack_all_capabilities = 0;
}
int pos = 0;
command[pos++] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG);
command[pos++] = identifier;
int i = 0;
for (i = 1; i < 9; i++){
if (get_bit16(sep.registered_service_categories, i)){
// service category
command[pos++] = i;
pos += avdtp_pack_service_capabilities(command+pos, sizeof(command)-pos, sep.capabilities, (avdtp_service_category_t)i, pack_all_capabilities);
}
}
command[pos++] = 0x04;
command[pos++] = 0x02;
command[pos++] = 0x02;
command[pos++] = 0x00;
// printf(" avdtp_acceptor_send_capabilities_response: \n");
// printf_hexdump(command, pos);
return l2cap_send(cid, command, pos);
}
static int avdtp_acceptor_send_capabilities_response(uint16_t cid, uint8_t transaction_label, avdtp_sep_t sep){
return avdtp_acceptor_send_capabilities(cid, transaction_label, sep, AVDTP_SI_GET_CAPABILITIES);
}
static int avdtp_acceptor_send_all_capabilities_response(uint16_t cid, uint8_t transaction_label, avdtp_sep_t sep){
return avdtp_acceptor_send_capabilities(cid, transaction_label, sep, AVDTP_SI_GET_ALL_CAPABILITIES);
}
static int avdtp_acceptor_send_stream_configuration_response(uint16_t cid, uint8_t transaction_label, avdtp_sep_t sep){
return avdtp_acceptor_send_capabilities(cid, transaction_label, sep, AVDTP_SI_GET_CONFIGURATION);
}
static int avdtp_acceptor_send_accept_response(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_RESPONSE_ACCEPT_MSG);
command[1] = (uint8_t)identifier;
return l2cap_send(cid, command, sizeof(command));
}
int avdtp_acceptor_stream_config_subsm(avdtp_stream_endpoint_t * stream_endpoint, avdtp_signaling_packet_header_t * signaling_header, uint8_t *packet, uint16_t size){
if (!stream_endpoint) return 0;
int request_to_send = 1;
// TODO remove signaling header
switch (stream_endpoint->acceptor_config_state){
case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE:
switch (signaling_header->signal_identifier){
case AVDTP_SI_GET_ALL_CAPABILITIES:
printf(" ACP: AVDTP_SI_GET_ALL_CAPABILITIES\n");
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES;
break;
case AVDTP_SI_GET_CAPABILITIES:
printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES\n");
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES;
break;
case AVDTP_SI_SET_CONFIGURATION:{
printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION \n");
avdtp_sep_t sep;
sep.seid = packet[3] >> 2;
// find or add sep
stream_endpoint->remote_sep_index = 0xFF;
int i;
for (i=0; i < stream_endpoint->remote_seps_num; i++){
if (stream_endpoint->remote_seps[i].seid == sep.seid){
stream_endpoint->remote_sep_index = i;
}
}
sep.registered_service_categories = avdtp_unpack_service_capabilities(&sep.capabilities, packet+4, size-4);
if (stream_endpoint->remote_sep_index == 0xFF){
printf(" ACP: seid %d not found in %p\n", sep.seid, stream_endpoint);
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(" ACP: add seid %d, to %p\n", stream_endpoint->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint);
}
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION;
break;
}
case AVDTP_SI_RECONFIGURE:{
// if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_OPENED){
// printf(" ACP: AVDTP_SI_RECONFIGURE, bad state %d \n", stream_endpoint->state);
// stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE;
// stream_endpoint->error_code = BAD_STATE;
// stream_endpoint->reject_signal_identifier = signaling_header->signal_identifier;
// break;
// }
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE;
stream_endpoint->failed_reconfigure_service_category = 0;
stream_endpoint->remote_sep_index = 0xFF;
printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE %p in state %d (AVDTP_STREAM_ENDPOINT_OPENED %d)\n", stream_endpoint, stream_endpoint->state, AVDTP_STREAM_ENDPOINT_OPENED);
avdtp_sep_t sep;
sep.seid = packet[3] >> 2;
sep.registered_service_categories = avdtp_unpack_service_capabilities(&sep.capabilities, packet+4, size-4);
// find or add sep
// printf(" ACP: search for seid in %p\n", stream_endpoint);
int i;
for (i = 0; i < stream_endpoint->remote_seps_num; i++){
if (stream_endpoint->remote_seps[i].seid == sep.seid){
stream_endpoint->remote_sep_index = i;
}
}
if (stream_endpoint->remote_sep_index == 0xFF){
printf(" ACP: AVDTP_SI_RECONFIGURE, bad state seid %d not found\n", sep.seid);
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE;
stream_endpoint->error_code = BAD_ACP_SEID;
stream_endpoint->reject_signal_identifier = signaling_header->signal_identifier;
break;
}
uint16_t remaining_service_categories = sep.registered_service_categories;
if (get_bit16(sep.registered_service_categories, AVDTP_MEDIA_CODEC-1)){
printf(" ACP: reconfigure media, not implemented\n");
remaining_service_categories = store_bit16(sep.registered_service_categories, AVDTP_MEDIA_CODEC-1, 0);
}
if (get_bit16(sep.registered_service_categories, AVDTP_CONTENT_PROTECTION-1)){
printf(" ACP: reconfigure content protection, not implemented\n");
remaining_service_categories = store_bit16(sep.registered_service_categories, AVDTP_CONTENT_PROTECTION-1, 0);
}
if (!remaining_service_categories) break;
printf("remained service_categories 0x%2x\n", remaining_service_categories);
// find first category that shouldn't be reconfigured
for (i = 1; i < 9; i++){
if (get_bit16(sep.registered_service_categories, i-1)){
stream_endpoint->failed_reconfigure_service_category = i;
}
}
break;
}
case AVDTP_SI_OPEN:
if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_CONFIGURED) return 0;
printf(" ACP: AVDTP_STREAM_ENDPOINT_W2_ANSWER_OPEN_STREAM\n");
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM;
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED;
stream_endpoint->connection->acceptor_transaction_label = signaling_header->transaction_label;
break;
case AVDTP_SI_GET_CONFIGURATION:
printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION\n");
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION;
stream_endpoint->connection->acceptor_transaction_label = signaling_header->transaction_label;
break;
case AVDTP_SI_START:
if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED) return 0;
printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM\n");
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM;
// TODO remove set acceptor_transaction_label
stream_endpoint->connection->acceptor_transaction_label = signaling_header->transaction_label;
break;
case AVDTP_SI_CLOSE:
switch (stream_endpoint->state){
case AVDTP_STREAM_ENDPOINT_OPENED:
case AVDTP_STREAM_ENDPOINT_STREAMING:
printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING;
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM;
break;
default:
printf(" ACP: AVDTP_SI_CLOSE, bad state %d \n", stream_endpoint->state);
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE;
stream_endpoint->error_code = BAD_STATE;
stream_endpoint->reject_signal_identifier = signaling_header->signal_identifier;
break;
}
break;
case AVDTP_SI_ABORT:
printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM\n");
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING;
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM;
break;
default:
printf(" ACP: NOT IMPLEMENTED, Reject signal_identifier %02x\n", signaling_header->signal_identifier);
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD;
stream_endpoint->reject_signal_identifier = signaling_header->signal_identifier;
break;
}
break;
default:
return 0;
}
if (!request_to_send){
printf(" ACP: NOT IMPLEMENTED\n");
}
return request_to_send;
}
static int avdtp_acceptor_send_response_reject_service_category(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t category, uint8_t transaction_label){
uint8_t command[3];
command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_GENERAL_REJECT_MSG);
command[1] = (uint8_t)identifier;
command[2] = category;
return l2cap_send(cid, command, sizeof(command));
}
static int avdtp_acceptor_send_response_reject(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_GENERAL_REJECT_MSG);
command[1] = (uint8_t)identifier;
return l2cap_send(cid, command, sizeof(command));
}
static int avdtp_acceptor_send_response_reject_with_error_code(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t error_code, uint8_t transaction_label){
uint8_t command[3];
command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_GENERAL_REJECT_MSG);
command[1] = (uint8_t)identifier;
command[2] = error_code;
return l2cap_send(cid, command, sizeof(command));
}
int avdtp_acceptor_stream_config_subsm_run(avdtp_connection_t * connection, avdtp_stream_endpoint_t * stream_endpoint){
if (!stream_endpoint) return 0;
int sent = 1;
uint8_t failed_reconfigure_service_category = stream_endpoint->failed_reconfigure_service_category;
avdtp_signal_identifier_t reject_signal_identifier = stream_endpoint->reject_signal_identifier;
uint8_t error_code = stream_endpoint->error_code;
avdtp_acceptor_stream_endpoint_state_t acceptor_config_state = stream_endpoint->acceptor_config_state;
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE;
switch (acceptor_config_state){
case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE:
break;
case AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES:
printf(" ACP: DONE\n");
avdtp_acceptor_send_capabilities_response(connection->l2cap_signaling_cid, connection->acceptor_transaction_label, stream_endpoint->sep);
break;
case AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES:
printf(" ACP: DONE\n");
avdtp_acceptor_send_all_capabilities_response(connection->l2cap_signaling_cid, connection->acceptor_transaction_label, stream_endpoint->sep);
break;
case AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION:
printf(" ACP: DONE\n");
printf(" -> AVDTP_STREAM_ENDPOINT_CONFIGURED\n");
stream_endpoint->connection = connection;
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED;
avdtp_acceptor_send_accept_response(connection->l2cap_signaling_cid, AVDTP_SI_SET_CONFIGURATION, connection->acceptor_transaction_label);
break;
case AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION:
printf(" ACP: DONE\n");
avdtp_acceptor_send_stream_configuration_response(connection->l2cap_signaling_cid, connection->acceptor_transaction_label, stream_endpoint->remote_seps[stream_endpoint->remote_sep_index]);
break;
case AVDTP_ACCEPTOR_W4_L2CAP_FOR_MEDIA_CONNECTED:
stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W4_L2CAP_FOR_MEDIA_CONNECTED;
return 0;
case AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM:
printf(" ACP: DONE\n");
avdtp_acceptor_send_accept_response(stream_endpoint->connection->l2cap_signaling_cid, AVDTP_SI_OPEN, stream_endpoint->connection->acceptor_transaction_label);
break;
case AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM:
printf(" ACP: DONE \n");
printf(" -> AVDTP_STREAM_ENDPOINT_STREAMING \n");
avdtp_acceptor_send_accept_response(stream_endpoint->connection->l2cap_signaling_cid, AVDTP_SI_START, stream_endpoint->connection->acceptor_transaction_label);
break;
case AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE:
printf(" ACP: DONE \n");
if (stream_endpoint->failed_reconfigure_service_category){
printf(" ACP: failed_reconfigure_service_category %d \n", failed_reconfigure_service_category);
stream_endpoint->failed_reconfigure_service_category = 0;
avdtp_acceptor_send_response_reject_service_category(stream_endpoint->connection->l2cap_signaling_cid, AVDTP_SI_RECONFIGURE,
failed_reconfigure_service_category, stream_endpoint->connection->acceptor_transaction_label);
break;
}
printf(" ACP: avdtp_acceptor_send_accept_response \n");
avdtp_acceptor_send_accept_response(stream_endpoint->connection->l2cap_signaling_cid, AVDTP_SI_RECONFIGURE, stream_endpoint->connection->acceptor_transaction_label);
break;
case AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM:
printf(" ACP: DONE\n");
avdtp_acceptor_send_accept_response(stream_endpoint->connection->l2cap_signaling_cid, AVDTP_SI_CLOSE, connection->acceptor_transaction_label);
break;
case AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM:
printf(" ACP: DONE\n");
avdtp_acceptor_send_accept_response(stream_endpoint->connection->l2cap_signaling_cid, AVDTP_SI_ABORT, connection->acceptor_transaction_label);
break;
case AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD:
printf(" ACP: REJECT\n");
stream_endpoint->reject_signal_identifier = 0;
avdtp_acceptor_send_response_reject(connection->l2cap_signaling_cid, reject_signal_identifier, connection->acceptor_transaction_label);
break;
case AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE:
printf(" ACP: REJECT\n");
stream_endpoint->reject_signal_identifier = 0;
stream_endpoint->error_code = 0;
avdtp_acceptor_send_response_reject_with_error_code(connection->l2cap_signaling_cid, reject_signal_identifier, error_code, connection->acceptor_transaction_label);
break;
default:
printf(" ACP: NOT IMPLEMENTED\n");
return 0;
}
return sent;
}
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