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/*
* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "common/bt_target.h"
#if BTA_AV_CA_INCLUDED
#include <string.h>
#include "bta/bta_av_api.h"
#include "bta_av_int.h"
#include "stack/avdt_api.h"
#include "bta/utl.h"
#include "stack/l2c_api.h"
#include "osi/allocator.h"
#include "osi/list.h"
#include "stack/goep_common.h"
#include "stack/goepc_api.h"
#include "stack/obex_api.h"
#include "common/bt_trace.h"
#define COVER_ART_HEADER_ID_IMG_HANDLE 0x30
#define COVER_ART_HEADER_ID_IMG_DESCRIPTOR 0x71
static const UINT8 cover_art_uuid[16] = {0x71, 0x63, 0xDD, 0x54, 0x4A, 0x7E, 0x11, 0xE2, 0xB4, 0x7C, 0x00, 0x50, 0xC2, 0x49, 0x00, 0x48};
static const char *cover_art_img_type_img = "x-bt/img-img";
static const char *cover_art_img_type_thm = "x-bt/img-thm";
static const char *cover_art_img_type_prop = "x-bt/img-properties";
#define COVER_ART_IMG_TYPE_IMG_LEN 13
#define COVER_ART_IMG_TYPE_THM_LEN 13
#define COVER_ART_IMG_TYPE_PROP_LEN 20
static BOOLEAN find_rcb_idx_by_goep_handle(UINT16 handle, UINT16 *out_idx)
{
for (UINT16 i = 0; i < BTA_AV_NUM_RCB; ++i) {
if (bta_av_cb.rcb[i].handle != BTA_AV_RC_HANDLE_NONE && bta_av_cb.rcb[i].cover_art_goep_hdl == handle) {
*out_idx = i;
return TRUE;
}
}
return FALSE;
}
static UINT8 get_rcb_idx(tBTA_AV_RCB *p_rcb)
{
return (p_rcb - &bta_av_cb.rcb[0]);
}
static void get_peer_bd_addr(tBTA_AV_RCB *p_rcb, BD_ADDR out_addr)
{
/* check if this rcb is related to a scb */
if (p_rcb->shdl && p_rcb->shdl <= BTA_AV_NUM_STRS) {
tBTA_AV_SCB *p_scb = bta_av_cb.p_scb[p_rcb->shdl - 1];
bdcpy(out_addr, p_scb->peer_addr);
}
/* else, try get peer addr from lcb */
else if (p_rcb->lidx && p_rcb->lidx <= BTA_AV_NUM_LINKS + 1)
{
bdcpy(out_addr, bta_av_cb.lcb[p_rcb->lidx-1].addr);
}
}
static void report_data_event(BT_HDR *pkt, UINT8 *p_data, UINT16 data_len, BOOLEAN final)
{
tBTA_AV_CA_DATA ca_data;
ca_data.status = BT_STATUS_SUCCESS;
ca_data.final = final;
ca_data.data_len = data_len;
ca_data.p_data = p_data;
ca_data.p_hdr = pkt;
(*bta_av_cb.p_cback)(BTA_AV_CA_DATA_EVT, (tBTA_AV *) &ca_data);
}
static void report_error_data_event(UINT16 status)
{
tBTA_AV_CA_DATA ca_data;
ca_data.status = status;
ca_data.final = TRUE;
ca_data.data_len = 0;
ca_data.p_data = NULL;
ca_data.p_hdr = NULL;
(*bta_av_cb.p_cback)(BTA_AV_CA_DATA_EVT, (tBTA_AV *) &ca_data);
}
static void build_and_send_connect_req(tBTA_AV_RCB *p_rcb)
{
tOBEX_PARSE_INFO info = {0};
info.opcode = OBEX_OPCODE_CONNECT;
info.obex_version_number = 0x15;
info.max_packet_length = p_rcb->cover_art_max_rx;
/* before OBEX connect response, we dont know cover_art_max_tx, use BT_SMALL_BUFFER_SIZE as tx buff size */
if (GOEPC_PrepareRequest(p_rcb->cover_art_goep_hdl, &info, BT_SMALL_BUFFER_SIZE) == GOEP_SUCCESS) {
GOEPC_RequestAddHeader(p_rcb->cover_art_goep_hdl, OBEX_HEADER_ID_TARGET, (UINT8 *)cover_art_uuid, 16);
GOEPC_SendRequest(p_rcb->cover_art_goep_hdl);
}
}
static void build_and_send_disconnect_req(tBTA_AV_RCB *p_rcb)
{
tOBEX_PARSE_INFO info = {0};
info.opcode = OBEX_OPCODE_DISCONNECT;
if (GOEPC_PrepareRequest(p_rcb->cover_art_goep_hdl, &info, BT_SMALL_BUFFER_SIZE) == GOEP_SUCCESS) {
GOEPC_RequestAddHeader(p_rcb->cover_art_goep_hdl, OBEX_HEADER_ID_CONNECTION_ID, (UINT8 *)(&p_rcb->cover_art_cid), 4);
GOEPC_SendRequest(p_rcb->cover_art_goep_hdl);
}
}
static void build_and_send_empty_get_req(tBTA_AV_RCB *p_rcb)
{
tOBEX_PARSE_INFO info = {0};
info.opcode = OBEX_OPCODE_GET_FINAL;
/* empty get request, use a small buff size */
UINT16 tx_buff_size = BT_SMALL_BUFFER_SIZE < p_rcb->cover_art_max_tx ? BT_SMALL_BUFFER_SIZE : p_rcb->cover_art_max_tx;
if (GOEPC_PrepareRequest(p_rcb->cover_art_goep_hdl, &info, tx_buff_size) == GOEP_SUCCESS) {
GOEPC_RequestAddHeader(p_rcb->cover_art_goep_hdl, OBEX_HEADER_ID_CONNECTION_ID, (UINT8 *)(&p_rcb->cover_art_cid), 4);
GOEPC_SendRequest(p_rcb->cover_art_goep_hdl);
}
}
static void close_goepc_and_disconnect(tBTA_AV_RCB *p_rcb)
{
if (p_rcb->cover_art_goep_hdl) {
GOEPC_Close(p_rcb->cover_art_goep_hdl);
}
p_rcb->cover_art_goep_hdl = 0;
p_rcb->cover_art_cid = 0;
p_rcb->cover_art_max_tx = 0;
p_rcb->cover_art_max_rx = 0;
tBTA_AV_DATA *p_data = (tBTA_AV_DATA *) osi_malloc(sizeof(tBTA_AV_DATA));
if (p_data == NULL) {
assert(0);
}
p_data->hdr.event = BTA_AV_CA_GOEP_DISCONNECT_EVT;
p_data->hdr.layer_specific = get_rcb_idx(p_rcb);
p_data->ca_disconnect.reason = BT_STATUS_FAIL;
bta_sys_sendmsg(p_data);
}
static void image_handle_to_utf16(const UINT8 *image_handle, UINT8 *buffer)
{
UINT8 pos = 0;
for (int i = 0 ; i < BTA_AV_CA_IMG_HDL_LEN ; i++){
buffer[pos++] = 0;
buffer[pos++] = image_handle[i];
}
buffer[pos++] = 0;
buffer[pos++] = 0;
}
void bta_av_ca_goep_event_handler(UINT16 handle, UINT8 event, tGOEPC_MSG *p_msg)
{
tBTA_AV_DATA *p_data = NULL;
UINT16 rcb_idx;
if (!find_rcb_idx_by_goep_handle(handle, &rcb_idx)) {
/* can not find a rcb, go error */
goto error;
}
if (event == GOEPC_RESPONSE_EVT || event == GOEPC_OPENED_EVT || event == GOEPC_CLOSED_EVT) {
p_data = (tBTA_AV_DATA *) osi_malloc(sizeof(tBTA_AV_DATA));
assert(p_data != NULL);
}
switch (event)
{
case GOEPC_OPENED_EVT:
p_data->hdr.layer_specific = rcb_idx;
p_data->hdr.event = BTA_AV_CA_GOEP_CONNECT_EVT;
p_data->ca_connect.max_rx = p_msg->opened.our_mtu;
break;
case GOEPC_CLOSED_EVT:
p_data->hdr.layer_specific = rcb_idx;
p_data->hdr.event = BTA_AV_CA_GOEP_DISCONNECT_EVT;
p_data->ca_disconnect.reason = BT_STATUS_FAIL;
break;
case GOEPC_RESPONSE_EVT:
p_data->hdr.layer_specific = rcb_idx;
p_data->ca_response.pkt = p_msg->response.pkt;
p_data->ca_response.opcode = p_msg->response.opcode;
p_data->ca_response.srm_en = p_msg->response.srm_en;
p_data->ca_response.srm_wait = p_msg->response.srm_wait;
if (p_msg->response.final) {
p_data->hdr.event = BTA_AV_CA_RESPONSE_FINAL_EVT;
}
else {
p_data->hdr.event = BTA_AV_CA_RESPONSE_EVT;
}
break;
case GOEPC_MTU_CHANGED_EVT:
case GOEPC_CONGEST_EVT:
case GOEPC_UNCONGEST_EVT:
/* ignore these event */
break;
default:
goto error;
break;
}
if (p_data) {
bta_sys_sendmsg(p_data);
}
return;
error:
/* can not find rcb, just free resource and disconnect */
if (p_data != NULL) {
osi_free(p_data);
}
if (event == GOEPC_RESPONSE_EVT && p_msg->response.pkt != NULL) {
osi_free(p_msg->response.pkt);
}
if (event != GOEPC_CLOSED_EVT) {
GOEPC_Close(handle);
}
}
void bta_av_ca_api_open(tBTA_AV_RCB *p_rcb, tBTA_AV_DATA *p_data)
{
tOBEX_SVR_INFO svr = {0};
svr.tl = OBEX_OVER_L2CAP;
svr.l2cap.psm = p_rcb->cover_art_l2cap_psm;
svr.l2cap.pref_mtu = p_data->api_ca_open.mtu;
/* reuse the security mask store in bta_av_cb, when support multi connection, this may need change */
svr.l2cap.sec_mask = bta_av_cb.sec_mask;
p_rcb->cover_art_max_rx = p_data->api_ca_open.mtu;
get_peer_bd_addr(p_rcb, svr.l2cap.addr);
if (GOEPC_Open(&svr, bta_av_ca_goep_event_handler, &p_rcb->cover_art_goep_hdl) != GOEP_SUCCESS) {
/* open failed */
if ((p_data = (tBTA_AV_DATA *) osi_malloc(sizeof(tBTA_AV_DATA))) == NULL) {
assert(0);
}
p_data->hdr.event = BTA_AV_CA_GOEP_DISCONNECT_EVT;
p_data->hdr.layer_specific = get_rcb_idx(p_rcb);
p_data->ca_disconnect.reason = BT_STATUS_FAIL;
bta_sys_sendmsg(p_data);
}
}
void bta_av_ca_api_close(tBTA_AV_RCB *p_rcb, tBTA_AV_DATA *p_data)
{
/* this is a normal disconnect, just build and send OBEX disconnect request */
build_and_send_disconnect_req(p_rcb);
}
void bta_av_ca_api_get(tBTA_AV_RCB *p_rcb, tBTA_AV_DATA *p_data)
{
tOBEX_PARSE_INFO info = {0};
UINT8 image_handle_utf16[BTA_AV_CA_IMG_HDL_UTF16_LEN];
info.opcode = OBEX_OPCODE_GET_FINAL;
/* limit the tx buff size to BT_DEFAULT_BUFFER_SIZE */
UINT16 tx_buff_size = BT_DEFAULT_BUFFER_SIZE < p_rcb->cover_art_max_tx ? BT_DEFAULT_BUFFER_SIZE : p_rcb->cover_art_max_tx;
if (GOEPC_PrepareRequest(p_rcb->cover_art_goep_hdl, &info, tx_buff_size) != GOEP_SUCCESS) {
/* something error */
goto error;
}
GOEPC_RequestAddHeader(p_rcb->cover_art_goep_hdl, OBEX_HEADER_ID_CONNECTION_ID, (UINT8 *)(&p_rcb->cover_art_cid), 4);
switch (p_data->api_ca_get.type)
{
case BTA_AV_CA_GET_IMAGE_PROPERTIES:
GOEPC_RequestAddHeader(p_rcb->cover_art_goep_hdl, OBEX_HEADER_ID_TYPE, (const UINT8 *)cover_art_img_type_prop, COVER_ART_IMG_TYPE_PROP_LEN);
break;
case BTA_AV_CA_GET_IMAGE:
GOEPC_RequestAddHeader(p_rcb->cover_art_goep_hdl, OBEX_HEADER_ID_TYPE, (const UINT8 *)cover_art_img_type_img, COVER_ART_IMG_TYPE_IMG_LEN);
break;
case BTA_AV_CA_GET_LINKED_THUMBNAIL:
GOEPC_RequestAddHeader(p_rcb->cover_art_goep_hdl, OBEX_HEADER_ID_TYPE, (const UINT8 *)cover_art_img_type_thm, COVER_ART_IMG_TYPE_THM_LEN);
break;
default:
/* should not go here */
assert(0);
break;
}
image_handle_to_utf16(p_data->api_ca_get.image_handle, image_handle_utf16);
GOEPC_RequestAddHeader(p_rcb->cover_art_goep_hdl, COVER_ART_HEADER_ID_IMG_HANDLE, (UINT8 *)image_handle_utf16, BTA_AV_CA_IMG_HDL_UTF16_LEN);
if (p_data->api_ca_get.type == BTA_AV_CA_GET_IMAGE) {
GOEPC_RequestAddHeader(p_rcb->cover_art_goep_hdl, COVER_ART_HEADER_ID_IMG_DESCRIPTOR, (UINT8 *)p_data->api_ca_get.image_descriptor, p_data->api_ca_get.image_descriptor_len);
osi_free(p_data->api_ca_get.image_descriptor);
}
/* always request to enable srm */
GOEPC_RequestSetSRM(p_rcb->cover_art_goep_hdl, TRUE, FALSE);
if (GOEPC_SendRequest(p_rcb->cover_art_goep_hdl) != GOEP_SUCCESS) {
goto error;
}
return;
error:
close_goepc_and_disconnect(p_rcb);
}
void bta_av_ca_response(tBTA_AV_RCB *p_rcb, tBTA_AV_DATA *p_data)
{
tOBEX_PARSE_INFO info;
OBEX_ParseResponse(p_data->ca_response.pkt, p_data->ca_response.opcode, &info);
/* we always use a final get */
if (p_data->ca_response.opcode == OBEX_OPCODE_GET_FINAL
&& (info.response_code == OBEX_RESPONSE_CODE_CONTINUE || info.response_code == (OBEX_RESPONSE_CODE_CONTINUE | OBEX_FINAL_BIT_MASK)))
{
UINT8 *header = NULL;
UINT8 *body_data = NULL;
UINT16 body_data_len = 0;
while((header = OBEX_GetNextHeader(p_data->ca_response.pkt, &info)) != NULL) {
switch (*header)
{
case OBEX_HEADER_ID_BODY:
/* actually,END_OF_BODY should not in this continue response */
case OBEX_HEADER_ID_END_OF_BODY:
if (body_data == NULL) {
/* first body header */
body_data = header + 3; /* skip opcode, length */
body_data_len = OBEX_GetHeaderLength(header) - 3;
}
else {
/* another body header found */
report_data_event(NULL, body_data, body_data_len, FALSE);
body_data = header + 3; /* skip opcode, length */
body_data_len = OBEX_GetHeaderLength(header) - 3;
}
break;
default:
break;
}
}
if (body_data != NULL) {
/* the only one or the last body data */
report_data_event(p_data->ca_response.pkt, body_data, body_data_len, FALSE);
}
else {
/* not any body data */
osi_free(p_data->ca_response.pkt);
}
/* if SRM not enable, we need to send a empty get request */
if (!p_data->ca_response.srm_en || p_data->ca_response.srm_wait) {
build_and_send_empty_get_req(p_rcb);
}
}
else {
osi_free(p_data->ca_response.pkt);
goto error;
}
return;
error:
close_goepc_and_disconnect(p_rcb);
}
void bta_av_ca_response_final(tBTA_AV_RCB *p_rcb, tBTA_AV_DATA *p_data)
{
tOBEX_PARSE_INFO info;
OBEX_ParseResponse(p_data->ca_response.pkt, p_data->ca_response.opcode, &info);
UINT8 *header = NULL;
if (p_data->ca_response.opcode == OBEX_OPCODE_CONNECT) {
/* we expect a success response code with final bit set */
if (info.response_code == (OBEX_RESPONSE_CODE_OK | OBEX_FINAL_BIT_MASK)) {
if (info.max_packet_length < 255) {
p_rcb->cover_art_max_tx = 255;
}
else {
p_rcb->cover_art_max_tx = info.max_packet_length;
}
BOOLEAN cid_found = false;
while((header = OBEX_GetNextHeader(p_data->ca_response.pkt, &info)) != NULL) {
if (*header == OBEX_HEADER_ID_CONNECTION_ID) {
cid_found = true;
memcpy((UINT8 *)(&p_rcb->cover_art_cid), header + 1, 4);
break;
}
}
if (!cid_found) {
goto error;
}
tBTA_AV_CA_STATUS ca_status;
ca_status.connected = TRUE;
ca_status.reason = BT_STATUS_SUCCESS;
(*bta_av_cb.p_cback)(BTA_AV_CA_STATUS_EVT, (tBTA_AV *) &ca_status);
/* done, free response packet */
osi_free(p_data->ca_response.pkt);
}
else {
osi_free(p_data->ca_response.pkt);
goto error;
}
}
else if (p_data->ca_response.opcode == OBEX_OPCODE_GET_FINAL) {
UINT8 *body_data = NULL;
UINT16 body_data_len = 0;
/* check response code is success */
if (info.response_code == (OBEX_RESPONSE_CODE_OK | OBEX_FINAL_BIT_MASK)) {
while((header = OBEX_GetNextHeader(p_data->ca_response.pkt, &info)) != NULL) {
switch (*header)
{
/* actually, BODY should not in this final response */
case OBEX_HEADER_ID_BODY:
case OBEX_HEADER_ID_END_OF_BODY:
if (body_data == NULL) {
/* first body header */
body_data = header + 3; /* skip opcode, length */
body_data_len = OBEX_GetHeaderLength(header) - 3;
}
else {
/* another body header found */
report_data_event(NULL, body_data, body_data_len, FALSE);
body_data = header + 3; /* skip opcode, length */
body_data_len = OBEX_GetHeaderLength(header) - 3;
}
break;
default:
break;
}
}
if (body_data != NULL) {
/* the only one or the last body data, packet will be free by upper layer */
report_data_event(p_data->ca_response.pkt, body_data, body_data_len, TRUE);
}
else {
/* not any body data */
osi_free(p_data->ca_response.pkt);
}
}
else {
report_error_data_event(BT_STATUS_FAIL);
osi_free(p_data->ca_response.pkt);
}
}
else if (p_data->ca_response.opcode == OBEX_OPCODE_DISCONNECT) {
/* received disconnect response, close l2cap channel and reset cover art value */
bta_av_ca_force_disconnect(p_rcb, p_data);
osi_free(p_data->ca_response.pkt);
}
else {
osi_free(p_data->ca_response.pkt);
goto error;
}
return;
error:
close_goepc_and_disconnect(p_rcb);
}
void bta_av_ca_goep_connect(tBTA_AV_RCB *p_rcb, tBTA_AV_DATA *p_data)
{
/* goep connection open, use a smaller value as max_rx */
if (p_rcb->cover_art_max_rx > p_data->ca_connect.max_rx) {
p_rcb->cover_art_max_rx = p_data->ca_connect.max_rx;
}
build_and_send_connect_req(p_rcb);
}
void bta_av_ca_goep_disconnect(tBTA_AV_RCB *p_rcb, tBTA_AV_DATA *p_data)
{
p_rcb->cover_art_goep_hdl = 0;
p_rcb->cover_art_max_rx = 0;
p_rcb->cover_art_max_tx = 0;
p_rcb->cover_art_cid = 0;
tBTA_AV_CA_STATUS ca_status;
ca_status.connected = FALSE;
ca_status.reason = p_data->ca_disconnect.reason;
(*bta_av_cb.p_cback)(BTA_AV_CA_STATUS_EVT, (tBTA_AV *) &ca_status);
}
void bta_av_ca_force_disconnect(tBTA_AV_RCB *p_rcb, tBTA_AV_DATA *p_data)
{
if (p_rcb->cover_art_goep_hdl) {
GOEPC_Close(p_rcb->cover_art_goep_hdl);
}
/* dont reset p_rcb->cover_art_l2cap_psm */
p_rcb->cover_art_goep_hdl = 0;
p_rcb->cover_art_cid = 0;
p_rcb->cover_art_max_tx = 0;
p_rcb->cover_art_max_rx = 0;
tBTA_AV_CA_STATUS ca_status;
ca_status.connected = FALSE;
/* force disconnect by upper, set reason to success */
ca_status.reason = BT_STATUS_SUCCESS;
(*bta_av_cb.p_cback)(BTA_AV_CA_STATUS_EVT, (tBTA_AV *) &ca_status);
}
void bta_av_ca_reset(tBTA_AV_RCB *p_rcb)
{
if (p_rcb->cover_art_goep_hdl) {
GOEPC_Close(p_rcb->cover_art_goep_hdl);
}
p_rcb->cover_art_l2cap_psm = 0;
p_rcb->cover_art_goep_hdl = 0;
p_rcb->cover_art_state = 0;
p_rcb->cover_art_cid = 0;
p_rcb->cover_art_max_tx = 0;
p_rcb->cover_art_max_rx = 0;
}
#endif /* BTA_AV_CA_INCLUDED */
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