/******************************************************************************
*
* Copyright 2002-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This module contains functions for parsing and building AVDTP signaling
* messages. It also contains functions called by the SCB or CCB state
* machines for sending command, response, and reject messages. It also
* contains a function that processes incoming messages and dispatches them
* to the appropriate SCB or CCB.
*
******************************************************************************/
#include <log/log.h>
#include <string.h>
#include "avdt_api.h"
#include "avdt_int.h"
#include "avdtc_api.h"
#include "bt_common.h"
#include "bt_target.h"
#include "bt_types.h"
#include "bt_utils.h"
#include "btu.h"
#include "osi/include/osi.h"
/*****************************************************************************
* constants
****************************************************************************/
/* mask of all psc values */
#define AVDT_MSG_PSC_MASK \
(AVDT_PSC_TRANS | AVDT_PSC_REPORT | AVDT_PSC_DELAY_RPT | AVDT_PSC_RECOV | \
AVDT_PSC_HDRCMP | AVDT_PSC_MUX)
#define AVDT_PSC_PROTECT (1 << 4) /* Content Protection */
#define AVDT_PSC_CODEC (1 << 7) /* codec */
/*****************************************************************************
* type definitions
****************************************************************************/
/* type for message building functions */
typedef void (*tAVDT_MSG_BLD)(uint8_t** p, tAVDT_MSG* p_msg);
/* type for message parsing functions */
typedef uint8_t (*tAVDT_MSG_PRS)(tAVDT_MSG* p_msg, uint8_t* p, uint16_t len);
/*****************************************************************************
* local function declarations
****************************************************************************/
static void avdt_msg_bld_none(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_single(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_setconfig_cmd(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_reconfig_cmd(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_multi(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_security_cmd(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_discover_rsp(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_svccap(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_security_rsp(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_all_svccap(uint8_t** p, tAVDT_MSG* p_msg);
static void avdt_msg_bld_delay_rpt(uint8_t** p, tAVDT_MSG* p_msg);
static uint8_t avdt_msg_prs_none(tAVDT_MSG* p_msg, uint8_t* p, uint16_t len);
static uint8_t avdt_msg_prs_single(tAVDT_MSG* p_msg, uint8_t* p, uint16_t len);
static uint8_t avdt_msg_prs_setconfig_cmd(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len);
static uint8_t avdt_msg_prs_reconfig_cmd(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len);
static uint8_t avdt_msg_prs_multi(tAVDT_MSG* p_msg, uint8_t* p, uint16_t len);
static uint8_t avdt_msg_prs_security_cmd(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len);
static uint8_t avdt_msg_prs_discover_rsp(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len);
static uint8_t avdt_msg_prs_svccap(tAVDT_MSG* p_msg, uint8_t* p, uint16_t len);
static uint8_t avdt_msg_prs_all_svccap(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len);
static uint8_t avdt_msg_prs_security_rsp(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len);
static uint8_t avdt_msg_prs_delay_rpt(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len);
/*****************************************************************************
* constants
****************************************************************************/
/* table of information element minimum lengths used for parsing */
const uint8_t avdt_msg_ie_len_min[] = {
0, /* unused */
AVDT_LEN_TRANS_MIN, /* media transport */
AVDT_LEN_REPORT_MIN, /* reporting */
AVDT_LEN_RECOV_MIN, /* recovery */
AVDT_LEN_PROTECT_MIN, /* content protection */
AVDT_LEN_HDRCMP_MIN, /* header compression */
AVDT_LEN_MUX_MIN, /* multiplexing */
AVDT_LEN_CODEC_MIN, /* codec */
AVDT_LEN_DELAY_RPT_MIN /* delay report */
};
/* table of information element minimum lengths used for parsing */
const uint8_t avdt_msg_ie_len_max[] = {
0, /* unused */
AVDT_LEN_TRANS_MAX, /* media transport */
AVDT_LEN_REPORT_MAX, /* reporting */
AVDT_LEN_RECOV_MAX, /* recovery */
AVDT_LEN_PROTECT_MAX, /* content protection */
AVDT_LEN_HDRCMP_MAX, /* header compression */
AVDT_LEN_MUX_MAX, /* multiplexing */
AVDT_LEN_CODEC_MAX, /* codec */
AVDT_LEN_DELAY_RPT_MAX /* delay report */
};
/* table of error codes used when decoding information elements */
const uint8_t avdt_msg_ie_err[] = {
0, /* unused */
AVDT_ERR_MEDIA_TRANS, /* media transport */
AVDT_ERR_LENGTH, /* reporting */
AVDT_ERR_RECOV_FMT, /* recovery */
AVDT_ERR_CP_FMT, /* content protection */
AVDT_ERR_ROHC_FMT, /* header compression */
AVDT_ERR_MUX_FMT, /* multiplexing */
AVDT_ERR_SERVICE, /* codec */
AVDT_ERR_SERVICE /* delay report ?? */
};
/* table of packet type minimum lengths */
static const uint8_t avdt_msg_pkt_type_len[] = {
AVDT_LEN_TYPE_SINGLE, AVDT_LEN_TYPE_START, AVDT_LEN_TYPE_CONT,
AVDT_LEN_TYPE_END};
/* function table for building command messages */
const tAVDT_MSG_BLD avdt_msg_bld_cmd[] = {
avdt_msg_bld_none, /* discover */
avdt_msg_bld_single, /* get capabilities */
avdt_msg_bld_setconfig_cmd, /* set configuration */
avdt_msg_bld_single, /* get configuration */
avdt_msg_bld_reconfig_cmd, /* reconfigure */
avdt_msg_bld_single, /* open */
avdt_msg_bld_multi, /* start */
avdt_msg_bld_single, /* close */
avdt_msg_bld_multi, /* suspend */
avdt_msg_bld_single, /* abort */
avdt_msg_bld_security_cmd, /* security control */
avdt_msg_bld_single, /* get all capabilities */
avdt_msg_bld_delay_rpt /* delay report */
};
/* function table for building response messages */
const tAVDT_MSG_BLD avdt_msg_bld_rsp[] = {
avdt_msg_bld_discover_rsp, /* discover */
avdt_msg_bld_svccap, /* get capabilities */
avdt_msg_bld_none, /* set configuration */
avdt_msg_bld_all_svccap, /* get configuration */
avdt_msg_bld_none, /* reconfigure */
avdt_msg_bld_none, /* open */
avdt_msg_bld_none, /* start */
avdt_msg_bld_none, /* close */
avdt_msg_bld_none, /* suspend */
avdt_msg_bld_none, /* abort */
avdt_msg_bld_security_rsp, /* security control */
avdt_msg_bld_all_svccap, /* get all capabilities */
avdt_msg_bld_none /* delay report */
};
/* function table for parsing command messages */
const tAVDT_MSG_PRS avdt_msg_prs_cmd[] = {
avdt_msg_prs_none, /* discover */
avdt_msg_prs_single, /* get capabilities */
avdt_msg_prs_setconfig_cmd, /* set configuration */
avdt_msg_prs_single, /* get configuration */
avdt_msg_prs_reconfig_cmd, /* reconfigure */
avdt_msg_prs_single, /* open */
avdt_msg_prs_multi, /* start */
avdt_msg_prs_single, /* close */
avdt_msg_prs_multi, /* suspend */
avdt_msg_prs_single, /* abort */
avdt_msg_prs_security_cmd, /* security control */
avdt_msg_prs_single, /* get all capabilities */
avdt_msg_prs_delay_rpt /* delay report */
};
/* function table for parsing response messages */
const tAVDT_MSG_PRS avdt_msg_prs_rsp[] = {
avdt_msg_prs_discover_rsp, /* discover */
avdt_msg_prs_svccap, /* get capabilities */
avdt_msg_prs_none, /* set configuration */
avdt_msg_prs_all_svccap, /* get configuration */
avdt_msg_prs_none, /* reconfigure */
avdt_msg_prs_none, /* open */
avdt_msg_prs_none, /* start */
avdt_msg_prs_none, /* close */
avdt_msg_prs_none, /* suspend */
avdt_msg_prs_none, /* abort */
avdt_msg_prs_security_rsp, /* security control */
avdt_msg_prs_all_svccap, /* get all capabilities */
avdt_msg_prs_none /* delay report */
};
/* command message-to-event lookup table */
const uint8_t avdt_msg_cmd_2_evt[] = {
AVDT_CCB_MSG_DISCOVER_CMD_EVT + AVDT_CCB_MKR, /* discover */
AVDT_CCB_MSG_GETCAP_CMD_EVT + AVDT_CCB_MKR, /* get capabilities */
AVDT_SCB_MSG_SETCONFIG_CMD_EVT, /* set configuration */
AVDT_SCB_MSG_GETCONFIG_CMD_EVT, /* get configuration */
AVDT_SCB_MSG_RECONFIG_CMD_EVT, /* reconfigure */
AVDT_SCB_MSG_OPEN_CMD_EVT, /* open */
AVDT_CCB_MSG_START_CMD_EVT + AVDT_CCB_MKR, /* start */
AVDT_SCB_MSG_CLOSE_CMD_EVT, /* close */
AVDT_CCB_MSG_SUSPEND_CMD_EVT + AVDT_CCB_MKR, /* suspend */
AVDT_SCB_MSG_ABORT_CMD_EVT, /* abort */
AVDT_SCB_MSG_SECURITY_CMD_EVT, /* security control */
AVDT_CCB_MSG_GETCAP_CMD_EVT + AVDT_CCB_MKR, /* get all capabilities */
AVDT_SCB_MSG_DELAY_RPT_CMD_EVT /* delay report */
};
/* response message-to-event lookup table */
const uint8_t avdt_msg_rsp_2_evt[] = {
AVDT_CCB_MSG_DISCOVER_RSP_EVT + AVDT_CCB_MKR, /* discover */
AVDT_CCB_MSG_GETCAP_RSP_EVT + AVDT_CCB_MKR, /* get capabilities */
AVDT_SCB_MSG_SETCONFIG_RSP_EVT, /* set configuration */
AVDT_SCB_MSG_GETCONFIG_RSP_EVT, /* get configuration */
AVDT_SCB_MSG_RECONFIG_RSP_EVT, /* reconfigure */
AVDT_SCB_MSG_OPEN_RSP_EVT, /* open */
AVDT_CCB_MSG_START_RSP_EVT + AVDT_CCB_MKR, /* start */
AVDT_SCB_MSG_CLOSE_RSP_EVT, /* close */
AVDT_CCB_MSG_SUSPEND_RSP_EVT + AVDT_CCB_MKR, /* suspend */
AVDT_SCB_MSG_ABORT_RSP_EVT, /* abort */
AVDT_SCB_MSG_SECURITY_RSP_EVT, /* security control */
AVDT_CCB_MSG_GETCAP_RSP_EVT + AVDT_CCB_MKR, /* get all capabilities */
AVDT_SCB_MSG_DELAY_RPT_RSP_EVT /* delay report */
};
/* reject message-to-event lookup table */
const uint8_t avdt_msg_rej_2_evt[] = {
AVDT_CCB_MSG_DISCOVER_RSP_EVT + AVDT_CCB_MKR, /* discover */
AVDT_CCB_MSG_GETCAP_RSP_EVT + AVDT_CCB_MKR, /* get capabilities */
AVDT_SCB_MSG_SETCONFIG_REJ_EVT, /* set configuration */
AVDT_SCB_MSG_GETCONFIG_RSP_EVT, /* get configuration */
AVDT_SCB_MSG_RECONFIG_RSP_EVT, /* reconfigure */
AVDT_SCB_MSG_OPEN_REJ_EVT, /* open */
AVDT_CCB_MSG_START_RSP_EVT + AVDT_CCB_MKR, /* start */
AVDT_SCB_MSG_CLOSE_RSP_EVT, /* close */
AVDT_CCB_MSG_SUSPEND_RSP_EVT + AVDT_CCB_MKR, /* suspend */
AVDT_SCB_MSG_ABORT_RSP_EVT, /* abort */
AVDT_SCB_MSG_SECURITY_RSP_EVT, /* security control */
AVDT_CCB_MSG_GETCAP_RSP_EVT + AVDT_CCB_MKR, /* get all capabilities */
0 /* delay report */
};
/*******************************************************************************
*
* Function avdt_msg_bld_cfg
*
* Description This function builds the configuration parameters contained
* in a command or response message.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_cfg(uint8_t** p, AvdtpSepConfig* p_cfg) {
uint8_t len;
/* for now, just build media transport, codec, and content protection, and
* multiplexing */
/* media transport */
if (p_cfg->psc_mask & AVDT_PSC_TRANS) {
*(*p)++ = AVDT_CAT_TRANS;
*(*p)++ = 0; /* length */
}
/* reporting transport */
if (p_cfg->psc_mask & AVDT_PSC_REPORT) {
*(*p)++ = AVDT_CAT_REPORT;
*(*p)++ = 0; /* length */
}
/* codec */
if (p_cfg->num_codec != 0) {
*(*p)++ = AVDT_CAT_CODEC;
len = p_cfg->codec_info[0] + 1;
if (len > AVDT_CODEC_SIZE) len = AVDT_CODEC_SIZE;
memcpy(*p, p_cfg->codec_info, len);
*p += len;
}
/* content protection */
if (p_cfg->num_protect != 0) {
*(*p)++ = AVDT_CAT_PROTECT;
len = p_cfg->protect_info[0] + 1;
if (len > AVDT_PROTECT_SIZE) len = AVDT_PROTECT_SIZE;
memcpy(*p, p_cfg->protect_info, len);
*p += len;
}
/* delay report */
if (p_cfg->psc_mask & AVDT_PSC_DELAY_RPT) {
*(*p)++ = AVDT_CAT_DELAY_RPT;
*(*p)++ = 0; /* length */
}
}
/*******************************************************************************
*
* Function avdt_msg_bld_none
*
* Description This message building function builds an empty message.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_none(UNUSED_ATTR uint8_t** p,
UNUSED_ATTR tAVDT_MSG* p_msg) {
return;
}
/*******************************************************************************
*
* Function avdt_msg_bld_single
*
* Description This message building function builds a message containing
* a single SEID.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_single(uint8_t** p, tAVDT_MSG* p_msg) {
AVDT_MSG_BLD_SEID(*p, p_msg->single.seid);
}
/*******************************************************************************
*
* Function avdt_msg_bld_setconfig_cmd
*
* Description This message building function builds a set configuration
* command message.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_setconfig_cmd(uint8_t** p, tAVDT_MSG* p_msg) {
AVDT_MSG_BLD_SEID(*p, p_msg->config_cmd.hdr.seid);
AVDT_MSG_BLD_SEID(*p, p_msg->config_cmd.int_seid);
avdt_msg_bld_cfg(p, p_msg->config_cmd.p_cfg);
}
/*******************************************************************************
*
* Function avdt_msg_bld_reconfig_cmd
*
* Description This message building function builds a reconfiguration
* command message.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_reconfig_cmd(uint8_t** p, tAVDT_MSG* p_msg) {
AVDT_MSG_BLD_SEID(*p, p_msg->reconfig_cmd.hdr.seid);
/* force psc mask zero to build only codec and security */
p_msg->reconfig_cmd.p_cfg->psc_mask = 0;
avdt_msg_bld_cfg(p, p_msg->reconfig_cmd.p_cfg);
}
/*******************************************************************************
*
* Function avdt_msg_bld_multi
*
* Description This message building function builds a message containing
* multiple SEID's.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_multi(uint8_t** p, tAVDT_MSG* p_msg) {
int i;
for (i = 0; i < p_msg->multi.num_seps; i++) {
AVDT_MSG_BLD_SEID(*p, p_msg->multi.seid_list[i]);
}
}
/*******************************************************************************
*
* Function avdt_msg_bld_security_cmd
*
* Description This message building function builds a security
* command message.
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_security_cmd(uint8_t** p, tAVDT_MSG* p_msg) {
AVDT_MSG_BLD_SEID(*p, p_msg->security_cmd.hdr.seid);
memcpy(*p, p_msg->security_cmd.p_data, p_msg->security_cmd.len);
*p += p_msg->security_cmd.len;
}
/*******************************************************************************
*
* Function avdt_msg_bld_delay_rpt
*
* Description This message building function builds a delay report
* command message.
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_delay_rpt(uint8_t** p, tAVDT_MSG* p_msg) {
AVDT_MSG_BLD_SEID(*p, p_msg->delay_rpt_cmd.hdr.seid);
UINT16_TO_BE_STREAM(*p, p_msg->delay_rpt_cmd.delay);
}
/*******************************************************************************
*
* Function avdt_msg_bld_discover_rsp
*
* Description This message building function builds a discover
* response message.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_discover_rsp(uint8_t** p, tAVDT_MSG* p_msg) {
int i;
for (i = 0; i < p_msg->discover_rsp.num_seps; i++) {
/* build discover rsp info */
AVDT_MSG_BLD_DISC(*p, p_msg->discover_rsp.p_sep_info[i].seid,
p_msg->discover_rsp.p_sep_info[i].in_use,
p_msg->discover_rsp.p_sep_info[i].media_type,
p_msg->discover_rsp.p_sep_info[i].tsep);
}
}
/*******************************************************************************
*
* Function avdt_msg_bld_svccap
*
* Description This message building function builds a message containing
* service capabilities parameters.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_svccap(uint8_t** p, tAVDT_MSG* p_msg) {
AvdtpSepConfig cfg = *p_msg->svccap.p_cfg;
// Include only the Basic Capability
cfg.psc_mask &= AVDT_LEG_PSC;
avdt_msg_bld_cfg(p, &cfg);
}
/*******************************************************************************
*
* Function avdt_msg_bld_all_svccap
*
* Description This message building function builds a message containing
* service capabilities parameters.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_all_svccap(uint8_t** p, tAVDT_MSG* p_msg) {
avdt_msg_bld_cfg(p, p_msg->svccap.p_cfg);
}
/*******************************************************************************
*
* Function avdt_msg_bld_security_rsp
*
* Description This message building function builds a security
* response message.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_msg_bld_security_rsp(uint8_t** p, tAVDT_MSG* p_msg) {
memcpy(*p, p_msg->security_rsp.p_data, p_msg->security_rsp.len);
*p += p_msg->security_rsp.len;
}
/*******************************************************************************
*
* Function avdt_msg_prs_cfg
*
* Description This message parsing function parses the configuration
* parameters field of a message.
*
*
* Returns Error code or zero if no error, and element that failed
* in p_elem.
*
******************************************************************************/
static uint8_t avdt_msg_prs_cfg(AvdtpSepConfig* p_cfg, uint8_t* p, uint16_t len,
uint8_t* p_elem, uint8_t sig_id) {
uint8_t* p_end;
uint8_t elem = 0;
uint8_t elem_len;
uint8_t tmp;
uint8_t err = 0;
uint8_t protect_offset = 0;
if (!p_cfg) {
AVDT_TRACE_ERROR("not expecting this cfg");
return AVDT_ERR_BAD_STATE;
}
p_cfg->psc_mask = 0;
p_cfg->num_codec = 0;
p_cfg->num_protect = 0;
/* while there is still data to parse */
p_end = p + len;
while ((p < p_end) && (err == 0)) {
/* verify overall length */
if ((p_end - p) < AVDT_LEN_CFG_MIN) {
err = AVDT_ERR_PAYLOAD;
break;
}
/* get and verify info elem id, length */
elem = *p++;
elem_len = *p++;
if ((elem == 0) || (elem > AVDT_CAT_MAX_CUR)) {
/* this may not be really bad.
* It may be a service category that is too new for us.
* allow these to be parsed without reporting an error.
* If this is a "capability" (as in GetCapRsp & GetConfigRsp), this is
* filtered out.
* If this is a Configuration (as in SetConfigCmd & ReconfigCmd),
* this will be marked as an error in the caller of this function */
if ((sig_id == AVDT_SIG_SETCONFIG) || (sig_id == AVDT_SIG_RECONFIG)) {
/* Cannot accept unknown category. */
err = AVDT_ERR_CATEGORY;
break;
} else /* GETCAP or GET_ALLCAP */
{
/* Skip unknown categories. */
p += elem_len;
AVDT_TRACE_DEBUG("skipping unknown service category=%d len: %d", elem,
elem_len);
continue;
}
}
if ((elem_len > avdt_msg_ie_len_max[elem]) ||
(elem_len < avdt_msg_ie_len_min[elem])) {
err = avdt_msg_ie_err[elem];
break;
}
/* add element to psc mask, but mask out codec or protect */
p_cfg->psc_mask |= (1 << elem);
AVDT_TRACE_DEBUG("elem=%d elem_len: %d psc_mask=0x%x", elem, elem_len,
p_cfg->psc_mask);
/* parse individual information elements with additional parameters */
switch (elem) {
case AVDT_CAT_RECOV:
if ((p_end - p) < 3) {
err = AVDT_ERR_PAYLOAD;
break;
}
p_cfg->recov_type = *p++;
p_cfg->recov_mrws = *p++;
p_cfg->recov_mnmp = *p++;
if (p_cfg->recov_type != AVDT_RECOV_RFC2733) {
err = AVDT_ERR_RECOV_TYPE;
} else if ((p_cfg->recov_mrws < AVDT_RECOV_MRWS_MIN) ||
(p_cfg->recov_mrws > AVDT_RECOV_MRWS_MAX) ||
(p_cfg->recov_mnmp < AVDT_RECOV_MNMP_MIN) ||
(p_cfg->recov_mnmp > AVDT_RECOV_MNMP_MAX)) {
err = AVDT_ERR_RECOV_FMT;
}
break;
case AVDT_CAT_PROTECT:
p_cfg->psc_mask &= ~AVDT_PSC_PROTECT;
if (p + elem_len > p_end) {
err = AVDT_ERR_LENGTH;
android_errorWriteLog(0x534e4554, "78288378");
break;
}
if ((elem_len + protect_offset) < AVDT_PROTECT_SIZE) {
p_cfg->num_protect++;
p_cfg->protect_info[protect_offset] = elem_len;
protect_offset++;
memcpy(&p_cfg->protect_info[protect_offset], p, elem_len);
protect_offset += elem_len;
}
p += elem_len;
break;
case AVDT_CAT_HDRCMP:
if ((p_end - p) < 1) {
err = AVDT_ERR_PAYLOAD;
break;
}
p_cfg->hdrcmp_mask = *p++;
break;
case AVDT_CAT_CODEC:
p_cfg->psc_mask &= ~AVDT_PSC_CODEC;
tmp = elem_len;
if (elem_len >= AVDT_CODEC_SIZE) {
tmp = AVDT_CODEC_SIZE - 1;
}
if (p + tmp > p_end) {
err = AVDT_ERR_LENGTH;
android_errorWriteLog(0x534e4554, "78288378");
break;
}
p_cfg->num_codec++;
p_cfg->codec_info[0] = elem_len;
memcpy(&p_cfg->codec_info[1], p, tmp);
p += elem_len;
break;
case AVDT_CAT_DELAY_RPT:
AVDT_TRACE_DEBUG("%s: Remote device supports delay reporting",
__func__);
break;
default:
p += elem_len;
break;
} /* switch */
} /* while ! err, !end*/
*p_elem = elem;
AVDT_TRACE_DEBUG("err=0x%x, elem:0x%x psc_mask=0x%x", err, elem,
p_cfg->psc_mask);
return err;
}
/*******************************************************************************
*
* Function avdt_msg_prs_none
*
* Description This message parsing function parses a message with no
* parameters.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_none(UNUSED_ATTR tAVDT_MSG* p_msg,
UNUSED_ATTR uint8_t* p,
UNUSED_ATTR uint16_t len) {
return 0;
}
/*******************************************************************************
*
* Function avdt_msg_prs_single
*
* Description This message parsing function parses a message with a
* single SEID.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_single(tAVDT_MSG* p_msg, uint8_t* p, uint16_t len) {
uint8_t err = 0;
/* verify len */
if (len != AVDT_LEN_SINGLE) {
err = AVDT_ERR_LENGTH;
} else {
AVDT_MSG_PRS_SEID(p, p_msg->single.seid);
if (avdt_scb_by_hdl(p_msg->single.seid) == NULL) {
err = AVDT_ERR_SEID;
}
}
return err;
}
/*******************************************************************************
*
* Function avdt_msg_prs_setconfig_cmd
*
* Description This message parsing function parses a set configuration
* command message.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_setconfig_cmd(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len) {
uint8_t err = 0;
p_msg->hdr.err_param = 0;
/* verify len */
if (len < AVDT_LEN_SETCONFIG_MIN) {
err = AVDT_ERR_LENGTH;
} else {
/* get seids */
AVDT_MSG_PRS_SEID(p, p_msg->config_cmd.hdr.seid);
if (avdt_scb_by_hdl(p_msg->config_cmd.hdr.seid) == NULL) {
err = AVDT_ERR_SEID;
}
AVDT_MSG_PRS_SEID(p, p_msg->config_cmd.int_seid);
if ((p_msg->config_cmd.int_seid < AVDT_SEID_MIN) ||
(p_msg->config_cmd.int_seid > AVDT_SEID_MAX)) {
err = AVDT_ERR_SEID;
}
}
if (!err) {
/* parse configuration parameters */
len -= 2;
err = avdt_msg_prs_cfg(p_msg->config_cmd.p_cfg, p, len,
&p_msg->hdr.err_param, AVDT_SIG_SETCONFIG);
if (!err) {
/* verify protocol service capabilities are supported */
if (((p_msg->config_cmd.p_cfg->psc_mask & (~AVDT_PSC)) != 0) ||
(p_msg->config_cmd.p_cfg->num_codec == 0)) {
err = AVDT_ERR_INVALID_CAP;
}
}
}
return err;
}
/*******************************************************************************
*
* Function avdt_msg_prs_reconfig_cmd
*
* Description This message parsing function parses a reconfiguration
* command message.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_reconfig_cmd(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len) {
uint8_t err = 0;
p_msg->hdr.err_param = 0;
/* verify len */
if (len < AVDT_LEN_RECONFIG_MIN) {
err = AVDT_ERR_LENGTH;
} else {
/* get seid */
AVDT_MSG_PRS_SEID(p, p_msg->reconfig_cmd.hdr.seid);
if (avdt_scb_by_hdl(p_msg->reconfig_cmd.hdr.seid) == NULL) {
err = AVDT_ERR_SEID;
} else {
/* parse config parameters */
len--;
err = avdt_msg_prs_cfg(p_msg->config_cmd.p_cfg, p, len,
&p_msg->hdr.err_param, AVDT_SIG_RECONFIG);
/* verify no protocol service capabilities in parameters */
if (!err) {
AVDT_TRACE_DEBUG("avdt_msg_prs_reconfig_cmd psc_mask=0x%x/0x%x",
p_msg->config_cmd.p_cfg->psc_mask, AVDT_MSG_PSC_MASK);
if ((p_msg->config_cmd.p_cfg->psc_mask != 0) ||
(p_msg->config_cmd.p_cfg->num_codec == 0 &&
p_msg->config_cmd.p_cfg->num_protect == 0)) {
err = AVDT_ERR_INVALID_CAP;
}
}
}
}
return err;
}
/*******************************************************************************
*
* Function avdt_msg_prs_multi
*
* Description This message parsing function parses a message containing
* multiple SEID's.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_multi(tAVDT_MSG* p_msg, uint8_t* p, uint16_t len) {
int i;
uint8_t err = 0;
p_msg->hdr.err_param = 0;
/* verify len */
if (len < AVDT_LEN_MULTI_MIN || (len > AVDT_NUM_SEPS)) {
err = AVDT_ERR_LENGTH;
} else {
/* get and verify all seps */
for (i = 0; i < len; i++) {
AVDT_MSG_PRS_SEID(p, p_msg->multi.seid_list[i]);
if (avdt_scb_by_hdl(p_msg->multi.seid_list[i]) == NULL) {
err = AVDT_ERR_SEID;
p_msg->hdr.err_param = p_msg->multi.seid_list[i];
break;
}
}
p_msg->multi.num_seps = (uint8_t)i;
}
return err;
}
/*******************************************************************************
*
* Function avdt_msg_prs_security_cmd
*
* Description This message parsing function parses a security
* command message.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_security_cmd(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len) {
uint8_t err = 0;
/* verify len */
if (len < AVDT_LEN_SECURITY_MIN) {
err = AVDT_ERR_LENGTH;
} else {
/* get seid */
AVDT_MSG_PRS_SEID(p, p_msg->security_cmd.hdr.seid);
if (avdt_scb_by_hdl(p_msg->security_cmd.hdr.seid) == NULL) {
err = AVDT_ERR_SEID;
} else {
p_msg->security_cmd.p_data = p;
p_msg->security_cmd.len = len - 1;
}
}
return err;
}
/*******************************************************************************
*
* Function avdt_msg_prs_discover_rsp
*
* Description This message parsing function parses a discover
* response message.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_discover_rsp(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len) {
int i;
uint8_t err = 0;
/* determine number of seps; seps in msg is len/2, but set to minimum
** of seps app has supplied memory for and seps in msg
*/
if (p_msg->discover_rsp.num_seps > (len / 2)) {
p_msg->discover_rsp.num_seps = (len / 2);
}
/* parse out sep info */
for (i = 0; i < p_msg->discover_rsp.num_seps; i++) {
/* parse discover rsp info */
AVDT_MSG_PRS_DISC(p, p_msg->discover_rsp.p_sep_info[i].seid,
p_msg->discover_rsp.p_sep_info[i].in_use,
p_msg->discover_rsp.p_sep_info[i].media_type,
p_msg->discover_rsp.p_sep_info[i].tsep);
/* verify that seid is valid */
if ((p_msg->discover_rsp.p_sep_info[i].seid < AVDT_SEID_MIN) ||
(p_msg->discover_rsp.p_sep_info[i].seid > AVDT_SEID_MAX)) {
err = AVDT_ERR_SEID;
break;
}
}
return err;
}
/*******************************************************************************
*
* Function avdt_msg_prs_svccap
*
* Description This message parsing function parses a message containing
* service capabilities parameters.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_svccap(tAVDT_MSG* p_msg, uint8_t* p, uint16_t len) {
/* parse parameters */
uint8_t err = avdt_msg_prs_cfg(p_msg->svccap.p_cfg, p, len,
&p_msg->hdr.err_param, AVDT_SIG_GETCAP);
if (p_msg->svccap.p_cfg) {
p_msg->svccap.p_cfg->psc_mask &= AVDT_LEG_PSC;
}
return (err);
}
/*******************************************************************************
*
* Function avdt_msg_prs_all_svccap
*
* Description This message parsing function parses a message containing
* service capabilities parameters.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_all_svccap(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len) {
uint8_t err = avdt_msg_prs_cfg(p_msg->svccap.p_cfg, p, len,
&p_msg->hdr.err_param, AVDT_SIG_GET_ALLCAP);
if (p_msg->svccap.p_cfg) {
p_msg->svccap.p_cfg->psc_mask &= AVDT_MSG_PSC_MASK;
}
return (err);
}
/*******************************************************************************
*
* Function avdt_msg_prs_security_rsp
*
* Description This message parsing function parsing a security
* response message.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_security_rsp(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len) {
p_msg->security_rsp.p_data = p;
p_msg->security_rsp.len = len;
return 0;
}
/*******************************************************************************
*
* Function avdt_msg_prs_rej
*
* Description
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_rej(tAVDT_MSG* p_msg, uint8_t* p, uint8_t sig) {
if ((sig == AVDT_SIG_SETCONFIG) || (sig == AVDT_SIG_RECONFIG)) {
p_msg->hdr.err_param = *p++;
p_msg->hdr.err_code = *p;
} else if ((sig == AVDT_SIG_START) || (sig == AVDT_SIG_SUSPEND)) {
AVDT_MSG_PRS_SEID(p, p_msg->hdr.err_param);
p_msg->hdr.err_code = *p;
} else {
p_msg->hdr.err_code = *p;
}
return 0;
}
/*******************************************************************************
*
* Function avdt_msg_prs_delay_rpt
*
* Description This message parsing function parses a security
* command message.
*
*
* Returns Error code or zero if no error.
*
******************************************************************************/
static uint8_t avdt_msg_prs_delay_rpt(tAVDT_MSG* p_msg, uint8_t* p,
uint16_t len) {
uint8_t err = 0;
/* verify len */
if (len != AVDT_LEN_DELAY_RPT) {
AVDT_TRACE_WARNING("avdt_msg_prs_delay_rpt expected len: %u got: %u",
AVDT_LEN_DELAY_RPT, len);
err = AVDT_ERR_LENGTH;
} else {
/* get seid */
AVDT_MSG_PRS_SEID(p, p_msg->delay_rpt_cmd.hdr.seid);
if (avdt_scb_by_hdl(p_msg->delay_rpt_cmd.hdr.seid) == NULL) {
err = AVDT_ERR_SEID;
} else {
BE_STREAM_TO_UINT16(p_msg->delay_rpt_cmd.delay, p);
AVDT_TRACE_DEBUG("avdt_msg_prs_delay_rpt delay: %u",
p_msg->delay_rpt_cmd.delay);
}
}
return err;
}
/*******************************************************************************
*
* Function avdt_msg_send
*
* Description Send, and if necessary fragment the next message.
*
*
* Returns Congested state; true if CCB congested, false if not.
*
******************************************************************************/
bool avdt_msg_send(AvdtpCcb* p_ccb, BT_HDR* p_msg) {
uint16_t curr_msg_len;
uint8_t pkt_type;
uint8_t hdr_len;
AvdtpTransportChannel* p_tbl;
BT_HDR* p_buf;
uint8_t* p;
uint8_t label;
uint8_t msg;
uint8_t sig;
uint8_t nosp = 0; /* number of subsequent packets */
/* look up transport channel table entry to get peer mtu */
p_tbl = avdt_ad_tc_tbl_by_type(AVDT_CHAN_SIG, p_ccb, NULL);
/* set the current message if there is a message passed in */
if (p_msg != NULL) {
p_ccb->p_curr_msg = p_msg;
}
/* store copy of curr_msg->len */
curr_msg_len = p_ccb->p_curr_msg->len;
/* while not congested and we haven't sent it all */
while ((!p_ccb->cong) && (p_ccb->p_curr_msg != NULL)) {
/* check what kind of message we've got here; we are using the offset
** to indicate that a message is being fragmented
*/
/* if message isn't being fragmented and it fits in mtu */
if ((p_ccb->p_curr_msg->offset == AVDT_MSG_OFFSET) &&
(p_ccb->p_curr_msg->len <= p_tbl->peer_mtu - AVDT_LEN_TYPE_SINGLE)) {
pkt_type = AVDT_PKT_TYPE_SINGLE;
hdr_len = AVDT_LEN_TYPE_SINGLE;
p_buf = p_ccb->p_curr_msg;
}
/* if message isn't being fragmented and it doesn't fit in mtu */
else if ((p_ccb->p_curr_msg->offset == AVDT_MSG_OFFSET) &&
(p_ccb->p_curr_msg->len >
p_tbl->peer_mtu - AVDT_LEN_TYPE_SINGLE)) {
pkt_type = AVDT_PKT_TYPE_START;
hdr_len = AVDT_LEN_TYPE_START;
nosp = (p_ccb->p_curr_msg->len + AVDT_LEN_TYPE_START - p_tbl->peer_mtu) /
(p_tbl->peer_mtu - 1) +
2;
/* get a new buffer for fragment we are sending */
p_buf = (BT_HDR*)osi_malloc(AVDT_CMD_BUF_SIZE);
/* copy portion of data from current message to new buffer */
p_buf->offset = L2CAP_MIN_OFFSET + hdr_len;
p_buf->len = p_tbl->peer_mtu - hdr_len;
memcpy((uint8_t*)(p_buf + 1) + p_buf->offset,
(uint8_t*)(p_ccb->p_curr_msg + 1) + p_ccb->p_curr_msg->offset,
p_buf->len);
}
/* if message is being fragmented and remaining bytes don't fit in mtu */
else if ((p_ccb->p_curr_msg->offset > AVDT_MSG_OFFSET) &&
(p_ccb->p_curr_msg->len >
(p_tbl->peer_mtu - AVDT_LEN_TYPE_CONT))) {
pkt_type = AVDT_PKT_TYPE_CONT;
hdr_len = AVDT_LEN_TYPE_CONT;
/* get a new buffer for fragment we are sending */
p_buf = (BT_HDR*)osi_malloc(AVDT_CMD_BUF_SIZE);
/* copy portion of data from current message to new buffer */
p_buf->offset = L2CAP_MIN_OFFSET + hdr_len;
p_buf->len = p_tbl->peer_mtu - hdr_len;
memcpy((uint8_t*)(p_buf + 1) + p_buf->offset,
(uint8_t*)(p_ccb->p_curr_msg + 1) + p_ccb->p_curr_msg->offset,
p_buf->len);
}
/* if message is being fragmented and remaining bytes do fit in mtu */
else {
pkt_type = AVDT_PKT_TYPE_END;
hdr_len = AVDT_LEN_TYPE_END;
p_buf = p_ccb->p_curr_msg;
}
/* label, sig id, msg type are in hdr of p_curr_msg */
label = AVDT_LAYERSPEC_LABEL(p_ccb->p_curr_msg->layer_specific);
msg = AVDT_LAYERSPEC_MSG(p_ccb->p_curr_msg->layer_specific);
sig = (uint8_t)p_ccb->p_curr_msg->event;
AVDT_TRACE_DEBUG("avdt_msg_send label:%d, msg:%d, sig:%d", label, msg, sig);
/* keep track of how much of msg we've sent */
curr_msg_len -= p_buf->len;
if (curr_msg_len == 0) {
/* entire message sent; mark as finished */
p_ccb->p_curr_msg = NULL;
/* start timer here for commands */
if (msg == AVDT_MSG_TYPE_CMD) {
/* if retransmit timeout set to zero, sig doesn't use retransmit */
if ((sig == AVDT_SIG_DISCOVER) || (sig == AVDT_SIG_GETCAP) ||
(sig == AVDT_SIG_SECURITY) || (avdtp_cb.rcb.ret_tout == 0)) {
alarm_cancel(p_ccb->idle_ccb_timer);
alarm_cancel(p_ccb->ret_ccb_timer);
uint64_t interval_ms = avdtp_cb.rcb.sig_tout * 1000;
alarm_set_on_mloop(p_ccb->rsp_ccb_timer, interval_ms,
avdt_ccb_rsp_ccb_timer_timeout, p_ccb);
} else if (sig != AVDT_SIG_DELAY_RPT) {
alarm_cancel(p_ccb->idle_ccb_timer);
alarm_cancel(p_ccb->rsp_ccb_timer);
uint64_t interval_ms = avdtp_cb.rcb.ret_tout * 1000;
alarm_set_on_mloop(p_ccb->ret_ccb_timer, interval_ms,
avdt_ccb_ret_ccb_timer_timeout, p_ccb);
}
}
} else {
/* message being fragmented and not completely sent */
p_ccb->p_curr_msg->len -= p_buf->len;
p_ccb->p_curr_msg->offset += p_buf->len;
}
/* set up to build header */
p_buf->len += hdr_len;
p_buf->offset -= hdr_len;
p = (uint8_t*)(p_buf + 1) + p_buf->offset;
/* build header */
AVDT_MSG_BLD_HDR(p, label, pkt_type, msg);
if (pkt_type == AVDT_PKT_TYPE_START) {
AVDT_MSG_BLD_NOSP(p, nosp);
}
if ((pkt_type == AVDT_PKT_TYPE_START) ||
(pkt_type == AVDT_PKT_TYPE_SINGLE)) {
AVDT_MSG_BLD_SIG(p, sig);
}
/* send msg buffer down */
avdt_ad_write_req(AVDT_CHAN_SIG, p_ccb, NULL, p_buf);
}
return (p_ccb->cong);
}
/*******************************************************************************
*
* Function avdt_msg_asmbl
*
* Description Reassemble incoming message.
*
*
* Returns Pointer to reassembled message; NULL if no message
* available.
*
******************************************************************************/
BT_HDR* avdt_msg_asmbl(AvdtpCcb* p_ccb, BT_HDR* p_buf) {
uint8_t* p;
uint8_t pkt_type;
BT_HDR* p_ret;
/* parse the message header */
p = (uint8_t*)(p_buf + 1) + p_buf->offset;
/* Check if is valid length */
if (p_buf->len < 1) {
android_errorWriteLog(0x534e4554, "78287084");
osi_free(p_buf);
p_ret = NULL;
return p_ret;
}
AVDT_MSG_PRS_PKT_TYPE(p, pkt_type);
/* quick sanity check on length */
if (p_buf->len < avdt_msg_pkt_type_len[pkt_type]) {
osi_free(p_buf);
AVDT_TRACE_WARNING("Bad length during reassembly");
p_ret = NULL;
}
/* single packet */
else if (pkt_type == AVDT_PKT_TYPE_SINGLE) {
/* if reassembly in progress drop message and process new single */
if (p_ccb->p_rx_msg != NULL)
AVDT_TRACE_WARNING("Got single during reassembly");
osi_free_and_reset((void**)&p_ccb->p_rx_msg);
p_ret = p_buf;
}
/* start packet */
else if (pkt_type == AVDT_PKT_TYPE_START) {
/* if reassembly in progress drop message and process new single */
if (p_ccb->p_rx_msg != NULL)
AVDT_TRACE_WARNING("Got start during reassembly");
osi_free_and_reset((void**)&p_ccb->p_rx_msg);
/*
* Allocate bigger buffer for reassembly. As lower layers are
* not aware of possible packet size after reassembly, they
* would have allocated smaller buffer.
*/
p_ccb->p_rx_msg = (BT_HDR*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
memcpy(p_ccb->p_rx_msg, p_buf, sizeof(BT_HDR) + p_buf->offset + p_buf->len);
/* Free original buffer */
osi_free(p_buf);
/* update p to point to new buffer */
p = (uint8_t*)(p_ccb->p_rx_msg + 1) + p_ccb->p_rx_msg->offset;
/* copy first header byte over nosp */
*(p + 1) = *p;
/* set offset to point to where to copy next */
p_ccb->p_rx_msg->offset += p_ccb->p_rx_msg->len;
/* adjust length for packet header */
p_ccb->p_rx_msg->len -= 1;
p_ret = NULL;
}
/* continue or end */
else {
/* if no reassembly in progress drop message */
if (p_ccb->p_rx_msg == NULL) {
osi_free(p_buf);
AVDT_TRACE_WARNING("Pkt type=%d out of order", pkt_type);
p_ret = NULL;
} else {
/* get size of buffer holding assembled message */
/*
* NOTE: The buffer is allocated above at the beginning of the
* reassembly, and is always of size BT_DEFAULT_BUFFER_SIZE.
*/
uint16_t buf_len = BT_DEFAULT_BUFFER_SIZE - sizeof(BT_HDR);
/* adjust offset and len of fragment for header byte */
p_buf->offset += AVDT_LEN_TYPE_CONT;
p_buf->len -= AVDT_LEN_TYPE_CONT;
/* verify length */
if ((p_ccb->p_rx_msg->offset + p_buf->len) > buf_len) {
/* won't fit; free everything */
AVDT_TRACE_WARNING("%s: Fragmented message too big!", __func__);
osi_free_and_reset((void**)&p_ccb->p_rx_msg);
osi_free(p_buf);
p_ret = NULL;
} else {
/* copy contents of p_buf to p_rx_msg */
memcpy((uint8_t*)(p_ccb->p_rx_msg + 1) + p_ccb->p_rx_msg->offset,
(uint8_t*)(p_buf + 1) + p_buf->offset, p_buf->len);
if (pkt_type == AVDT_PKT_TYPE_END) {
p_ccb->p_rx_msg->offset -= p_ccb->p_rx_msg->len;
p_ccb->p_rx_msg->len += p_buf->len;
p_ret = p_ccb->p_rx_msg;
p_ccb->p_rx_msg = NULL;
} else {
p_ccb->p_rx_msg->offset += p_buf->len;
p_ccb->p_rx_msg->len += p_buf->len;
p_ret = NULL;
}
osi_free(p_buf);
}
}
}
return p_ret;
}
/*******************************************************************************
*
* Function avdt_msg_send_cmd
*
* Description This function is called to send a command message. The
* sig_id parameter indicates the message type, p_params
* points to the message parameters, if any. It gets a buffer
* from the AVDTP command pool, executes the message building
* function for this message type. It then queues the message
* in the command queue for this CCB.
*
*
* Returns Nothing.
*
******************************************************************************/
void avdt_msg_send_cmd(AvdtpCcb* p_ccb, void* p_scb, uint8_t sig_id,
tAVDT_MSG* p_params) {
uint8_t* p;
uint8_t* p_start;
BT_HDR* p_buf = (BT_HDR*)osi_malloc(AVDT_CMD_BUF_SIZE);
/* set up buf pointer and offset */
p_buf->offset = AVDT_MSG_OFFSET;
p_start = p = (uint8_t*)(p_buf + 1) + p_buf->offset;
/* execute parameter building function to build message */
(*avdt_msg_bld_cmd[sig_id - 1])(&p, p_params);
/* set len */
p_buf->len = (uint16_t)(p - p_start);
/* now store scb hdls, if any, in buf */
if (p_scb != NULL) {
p = (uint8_t*)(p_buf + 1);
/* for start and suspend, p_scb points to array of handles */
if ((sig_id == AVDT_SIG_START) || (sig_id == AVDT_SIG_SUSPEND)) {
memcpy(p, (uint8_t*)p_scb, p_buf->len);
}
/* for all others, p_scb points to scb as usual */
else {
*p = avdt_scb_to_hdl((AvdtpScb*)p_scb);
}
}
/* stash sig, label, and message type in buf */
p_buf->event = sig_id;
AVDT_BLD_LAYERSPEC(p_buf->layer_specific, AVDT_MSG_TYPE_CMD, p_ccb->label);
/* increment label */
p_ccb->label = (p_ccb->label + 1) % 16;
/* queue message and trigger ccb to send it */
fixed_queue_enqueue(p_ccb->cmd_q, p_buf);
avdt_ccb_event(p_ccb, AVDT_CCB_SENDMSG_EVT, NULL);
}
/*******************************************************************************
*
* Function avdt_msg_send_rsp
*
* Description This function is called to send a response message. The
* sig_id parameter indicates the message type, p_params
* points to the message parameters, if any. It gets a buffer
* from the AVDTP command pool, executes the message building
* function for this message type. It then queues the message
* in the response queue for this CCB.
*
*
* Returns Nothing.
*
******************************************************************************/
void avdt_msg_send_rsp(AvdtpCcb* p_ccb, uint8_t sig_id, tAVDT_MSG* p_params) {
uint8_t* p;
uint8_t* p_start;
BT_HDR* p_buf = (BT_HDR*)osi_malloc(AVDT_CMD_BUF_SIZE);
/* set up buf pointer and offset */
p_buf->offset = AVDT_MSG_OFFSET;
p_start = p = (uint8_t*)(p_buf + 1) + p_buf->offset;
/* execute parameter building function to build message */
(*avdt_msg_bld_rsp[sig_id - 1])(&p, p_params);
/* set length */
p_buf->len = (uint16_t)(p - p_start);
/* stash sig, label, and message type in buf */
p_buf->event = sig_id;
AVDT_BLD_LAYERSPEC(p_buf->layer_specific, AVDT_MSG_TYPE_RSP,
p_params->hdr.label);
/* queue message and trigger ccb to send it */
fixed_queue_enqueue(p_ccb->rsp_q, p_buf);
avdt_ccb_event(p_ccb, AVDT_CCB_SENDMSG_EVT, NULL);
}
/*******************************************************************************
*
* Function avdt_msg_send_rej
*
* Description This function is called to send a reject message. The
* sig_id parameter indicates the message type. It gets
* a buffer from the AVDTP command pool and builds the
* message based on the message type and the error code.
* It then queues the message in the response queue for
* this CCB.
*
*
* Returns Nothing.
*
******************************************************************************/
void avdt_msg_send_rej(AvdtpCcb* p_ccb, uint8_t sig_id, tAVDT_MSG* p_params) {
uint8_t* p;
uint8_t* p_start;
BT_HDR* p_buf = (BT_HDR*)osi_malloc(AVDT_CMD_BUF_SIZE);
/* set up buf pointer and offset */
p_buf->offset = AVDT_MSG_OFFSET;
p_start = p = (uint8_t*)(p_buf + 1) + p_buf->offset;
/* if sig id included, build into message */
if (sig_id != AVDT_SIG_NONE) {
/* if this sig has a parameter, add the parameter */
if ((sig_id == AVDT_SIG_SETCONFIG) || (sig_id == AVDT_SIG_RECONFIG)) {
AVDT_MSG_BLD_PARAM(p, p_params->hdr.err_param);
} else if ((sig_id == AVDT_SIG_START) || (sig_id == AVDT_SIG_SUSPEND)) {
AVDT_MSG_BLD_SEID(p, p_params->hdr.err_param);
}
/* add the error code */
AVDT_MSG_BLD_ERR(p, p_params->hdr.err_code);
}
AVDT_TRACE_DEBUG("avdt_msg_send_rej");
/* calculate length */
p_buf->len = (uint16_t)(p - p_start);
/* stash sig, label, and message type in buf */
p_buf->event = sig_id;
AVDT_BLD_LAYERSPEC(p_buf->layer_specific, AVDT_MSG_TYPE_REJ,
p_params->hdr.label);
/* queue message and trigger ccb to send it */
fixed_queue_enqueue(p_ccb->rsp_q, p_buf);
avdt_ccb_event(p_ccb, AVDT_CCB_SENDMSG_EVT, NULL);
}
/*******************************************************************************
*
* Function avdt_msg_send_grej
*
* Description This function is called to send a general reject message.
* The sig_id parameter indicates the message type. It gets
* a buffer from the AVDTP command pool and builds the
* message based on the message type and the error code.
* It then queues the message in the response queue for
* this CCB.
*
*
* Returns Nothing.
*
******************************************************************************/
void avdt_msg_send_grej(AvdtpCcb* p_ccb, uint8_t sig_id, tAVDT_MSG* p_params) {
uint8_t* p;
uint8_t* p_start;
BT_HDR* p_buf = (BT_HDR*)osi_malloc(AVDT_CMD_BUF_SIZE);
/* set up buf pointer and offset */
p_buf->offset = AVDT_MSG_OFFSET;
p_start = p = (uint8_t*)(p_buf + 1) + p_buf->offset;
/* calculate length */
p_buf->len = (uint16_t)(p - p_start);
/* stash sig, label, and message type in buf */
p_buf->event = sig_id;
AVDT_BLD_LAYERSPEC(p_buf->layer_specific, AVDT_MSG_TYPE_GRJ,
p_params->hdr.label);
AVDT_TRACE_DEBUG(__func__);
/* queue message and trigger ccb to send it */
fixed_queue_enqueue(p_ccb->rsp_q, p_buf);
avdt_ccb_event(p_ccb, AVDT_CCB_SENDMSG_EVT, NULL);
}
/*******************************************************************************
*
* Function avdt_msg_ind
*
* Description This function is called by the adaption layer when an
* incoming message is received on the signaling channel.
* It parses the message and sends an event to the appropriate
* SCB or CCB for the message.
*
*
* Returns Nothing.
*
******************************************************************************/
void avdt_msg_ind(AvdtpCcb* p_ccb, BT_HDR* p_buf) {
AvdtpScb* p_scb;
uint8_t* p;
bool ok = true;
bool handle_rsp = false;
bool gen_rej = false;
uint8_t label;
uint8_t pkt_type;
uint8_t msg_type;
uint8_t sig = 0;
tAVDT_MSG msg{};
AvdtpSepConfig cfg{};
uint8_t err;
uint8_t evt = 0;
uint8_t scb_hdl;
/* reassemble message; if no message available (we received a fragment) return
*/
p_buf = avdt_msg_asmbl(p_ccb, p_buf);
if (p_buf == NULL) {
return;
}
p = (uint8_t*)(p_buf + 1) + p_buf->offset;
/* parse the message header */
AVDT_MSG_PRS_HDR(p, label, pkt_type, msg_type);
AVDT_TRACE_DEBUG("msg_type=%d, sig=%d", msg_type, sig);
/* set up label and ccb_idx in message hdr */
msg.hdr.label = label;
msg.hdr.ccb_idx = avdt_ccb_to_idx(p_ccb);
/* verify msg type */
if (msg_type == AVDT_MSG_TYPE_GRJ) {
AVDT_TRACE_WARNING("Dropping msg msg_type=%d", msg_type);
ok = false;
}
/* check for general reject */
else if ((msg_type == AVDT_MSG_TYPE_REJ) &&
(p_buf->len == AVDT_LEN_GEN_REJ)) {
gen_rej = true;
if (p_ccb->p_curr_cmd != NULL) {
msg.hdr.sig_id = sig = (uint8_t)p_ccb->p_curr_cmd->event;
evt = avdt_msg_rej_2_evt[sig - 1];
msg.hdr.err_code = AVDT_ERR_NSC;
msg.hdr.err_param = 0;
}
} else /* not a general reject */
{
/* get and verify signal */
AVDT_MSG_PRS_SIG(p, sig);
msg.hdr.sig_id = sig;
if ((sig == 0) || (sig > AVDT_SIG_MAX)) {
AVDT_TRACE_WARNING("Dropping msg sig=%d msg_type:%d", sig, msg_type);
ok = false;
/* send a general reject */
if (msg_type == AVDT_MSG_TYPE_CMD) {
avdt_msg_send_grej(p_ccb, sig, &msg);
}
}
}
if (ok && !gen_rej) {
/* skip over header (msg length already verified during reassembly) */
p_buf->len -= AVDT_LEN_TYPE_SINGLE;
/* set up to parse message */
if ((msg_type == AVDT_MSG_TYPE_RSP) && (sig == AVDT_SIG_DISCOVER)) {
/* parse discover rsp message to struct supplied by app */
msg.discover_rsp.p_sep_info = (tAVDT_SEP_INFO*)p_ccb->p_proc_data;
msg.discover_rsp.num_seps = p_ccb->proc_param;
} else if ((msg_type == AVDT_MSG_TYPE_RSP) &&
((sig == AVDT_SIG_GETCAP) || (sig == AVDT_SIG_GET_ALLCAP))) {
/* parse discover rsp message to struct supplied by app */
msg.svccap.p_cfg = (AvdtpSepConfig*)p_ccb->p_proc_data;
} else if ((msg_type == AVDT_MSG_TYPE_RSP) && (sig == AVDT_SIG_GETCONFIG)) {
/* parse get config rsp message to struct allocated locally */
msg.svccap.p_cfg = &cfg;
} else if ((msg_type == AVDT_MSG_TYPE_CMD) && (sig == AVDT_SIG_SETCONFIG)) {
/* parse config cmd message to struct allocated locally */
msg.config_cmd.p_cfg = &cfg;
} else if ((msg_type == AVDT_MSG_TYPE_CMD) && (sig == AVDT_SIG_RECONFIG)) {
/* parse reconfig cmd message to struct allocated locally */
msg.reconfig_cmd.p_cfg = &cfg;
}
/* parse message; while we're at it map message sig to event */
if (msg_type == AVDT_MSG_TYPE_CMD) {
msg.hdr.err_code = err =
(*avdt_msg_prs_cmd[sig - 1])(&msg, p, p_buf->len);
evt = avdt_msg_cmd_2_evt[sig - 1];
} else if (msg_type == AVDT_MSG_TYPE_RSP) {
msg.hdr.err_code = err =
(*avdt_msg_prs_rsp[sig - 1])(&msg, p, p_buf->len);
evt = avdt_msg_rsp_2_evt[sig - 1];
} else /* msg_type == AVDT_MSG_TYPE_REJ */
{
err = avdt_msg_prs_rej(&msg, p, sig);
evt = avdt_msg_rej_2_evt[sig - 1];
}
/* if parsing failed */
if (err != 0) {
AVDT_TRACE_WARNING("Parsing failed sig=%d err=0x%x", sig, err);
/* if its a rsp or rej, drop it; if its a cmd, send a rej;
** note special case for abort; never send abort reject
*/
ok = false;
if ((msg_type == AVDT_MSG_TYPE_CMD) && (sig != AVDT_SIG_ABORT)) {
avdt_msg_send_rej(p_ccb, sig, &msg);
}
}
}
/* if its a rsp or rej, check sent cmd to see if we're waiting for
** the rsp or rej. If we didn't send a cmd for it, drop it. If
** it does match a cmd, stop timer for the cmd.
*/
if (ok) {
if ((msg_type == AVDT_MSG_TYPE_RSP) || (msg_type == AVDT_MSG_TYPE_REJ)) {
if ((p_ccb->p_curr_cmd != NULL) && (p_ccb->p_curr_cmd->event == sig) &&
(AVDT_LAYERSPEC_LABEL(p_ccb->p_curr_cmd->layer_specific) == label)) {
/* stop timer */
alarm_cancel(p_ccb->idle_ccb_timer);
alarm_cancel(p_ccb->ret_ccb_timer);
alarm_cancel(p_ccb->rsp_ccb_timer);
/* clear retransmission count */
p_ccb->ret_count = 0;
/* later in this function handle ccb event */
handle_rsp = true;
} else {
ok = false;
AVDT_TRACE_WARNING("Cmd not found for rsp sig=%d label=%d", sig, label);
}
}
}
if (ok) {
/* if it's a ccb event send to ccb */
if (evt & AVDT_CCB_MKR) {
tAVDT_CCB_EVT avdt_ccb_evt;
avdt_ccb_evt.msg = msg;
avdt_ccb_event(p_ccb, (uint8_t)(evt & ~AVDT_CCB_MKR), &avdt_ccb_evt);
}
/* if it's a scb event */
else {
/* Scb events always have a single seid. For cmd, get seid from
** message. For rej and rsp, get seid from p_curr_cmd.
*/
if (msg_type == AVDT_MSG_TYPE_CMD) {
scb_hdl = msg.single.seid;
} else {
scb_hdl = *((uint8_t*)(p_ccb->p_curr_cmd + 1));
}
/* Map seid to the scb and send it the event. For cmd, seid has
** already been verified by parsing function.
*/
if (evt) {
p_scb = avdt_scb_by_hdl(scb_hdl);
if (p_scb != NULL) {
tAVDT_SCB_EVT avdt_scb_evt;
avdt_scb_evt.msg = msg;
avdt_scb_event(p_scb, evt, &avdt_scb_evt);
}
}
}
}
/* free message buffer */
osi_free(p_buf);
/* if its a rsp or rej, send event to ccb to free associated
** cmd msg buffer and handle cmd queue
*/
if (handle_rsp) {
avdt_ccb_event(p_ccb, AVDT_CCB_RCVRSP_EVT, NULL);
}
}