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esp-idf/components/bt/host/bluedroid/stack/sdp/sdp_discovery.c
Hrishikesh Dhayagude 21165edf41 Bluetooth component refactoring
2019-06-30 16:39:00 +08:00

1027 lines
34 KiB
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/******************************************************************************
*
* Copyright (C) 1999-2012 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 file contains SDP discovery functions
*
******************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "common/bt_target.h"
#include "osi/allocator.h"
#include "stack/l2cdefs.h"
#include "stack/hcidefs.h"
#include "stack/hcimsgs.h"
#include "stack/sdp_api.h"
#include "sdpint.h"
#include "stack/btu.h"
#include "stack/btm_api.h"
#ifndef SDP_DEBUG_RAW
#define SDP_DEBUG_RAW FALSE
#endif
/********************************************************************************/
/* L O C A L F U N C T I O N P R O T O T Y P E S */
/********************************************************************************/
#if SDP_CLIENT_ENABLED == TRUE
static void process_service_search_rsp (tCONN_CB *p_ccb, UINT8 *p_reply);
static void process_service_attr_rsp (tCONN_CB *p_ccb, UINT8 *p_reply);
static void process_service_search_attr_rsp (tCONN_CB *p_ccb, UINT8 *p_reply);
static UINT8 *save_attr_seq (tCONN_CB *p_ccb, UINT8 *p, UINT8 *p_msg_end);
static tSDP_DISC_REC *add_record (tSDP_DISCOVERY_DB *p_db, BD_ADDR p_bda);
static UINT8 *add_attr (UINT8 *p, tSDP_DISCOVERY_DB *p_db, tSDP_DISC_REC *p_rec,
UINT16 attr_id, tSDP_DISC_ATTR *p_parent_attr, UINT8 nest_level);
/* Safety check in case we go crazy */
#define MAX_NEST_LEVELS 5
/*******************************************************************************
**
** Function sdpu_build_uuid_seq
**
** Description This function builds a UUID sequence from the list of
** passed UUIDs. It is also passed the address of the output
** buffer.
**
** Returns Pointer to next byte in the output buffer.
**
*******************************************************************************/
static UINT8 *sdpu_build_uuid_seq (UINT8 *p_out, UINT16 num_uuids, tSDP_UUID *p_uuid_list)
{
UINT16 xx;
UINT8 *p_len;
/* First thing is the data element header */
UINT8_TO_BE_STREAM (p_out, (DATA_ELE_SEQ_DESC_TYPE << 3) | SIZE_IN_NEXT_BYTE);
/* Remember where the length goes. Leave space for it. */
p_len = p_out;
p_out += 1;
/* Now, loop through and put in all the UUID(s) */
for (xx = 0; xx < num_uuids; xx++, p_uuid_list++) {
if (p_uuid_list->len == 2) {
UINT8_TO_BE_STREAM (p_out, (UUID_DESC_TYPE << 3) | SIZE_TWO_BYTES);
UINT16_TO_BE_STREAM (p_out, p_uuid_list->uu.uuid16);
} else if (p_uuid_list->len == 4) {
UINT8_TO_BE_STREAM (p_out, (UUID_DESC_TYPE << 3) | SIZE_FOUR_BYTES);
UINT32_TO_BE_STREAM (p_out, p_uuid_list->uu.uuid32);
} else {
UINT8_TO_BE_STREAM (p_out, (UUID_DESC_TYPE << 3) | SIZE_SIXTEEN_BYTES);
ARRAY_TO_BE_STREAM (p_out, p_uuid_list->uu.uuid128, p_uuid_list->len);
}
}
/* Now, put in the length */
xx = (UINT16)(p_out - p_len - 1);
UINT8_TO_BE_STREAM (p_len, xx);
return (p_out);
}
/*******************************************************************************
**
** Function sdp_snd_service_search_req
**
** Description Send a service search request to the SDP server.
**
** Returns void
**
*******************************************************************************/
static void sdp_snd_service_search_req(tCONN_CB *p_ccb, UINT8 cont_len, UINT8 *p_cont)
{
UINT8 *p, *p_start, *p_param_len;
BT_HDR *p_cmd;
UINT16 param_len;
/* Get a buffer to send the packet to L2CAP */
if ((p_cmd = (BT_HDR *) osi_malloc(SDP_DATA_BUF_SIZE)) == NULL) {
sdp_disconnect (p_ccb, SDP_NO_RESOURCES);
return;
}
p_cmd->offset = L2CAP_MIN_OFFSET;
p = p_start = (UINT8 *)(p_cmd + 1) + L2CAP_MIN_OFFSET;
/* Build a service search request packet */
UINT8_TO_BE_STREAM (p, SDP_PDU_SERVICE_SEARCH_REQ);
UINT16_TO_BE_STREAM (p, p_ccb->transaction_id);
p_ccb->transaction_id++;
/* Skip the length, we need to add it at the end */
p_param_len = p;
p += 2;
/* Build the UID sequence. */
#if (defined(SDP_BROWSE_PLUS) && SDP_BROWSE_PLUS == TRUE)
p = sdpu_build_uuid_seq (p, 1, &p_ccb->p_db->uuid_filters[p_ccb->cur_uuid_idx]);
#else
p = sdpu_build_uuid_seq (p, p_ccb->p_db->num_uuid_filters, p_ccb->p_db->uuid_filters);
#endif
/* Set max service record count */
UINT16_TO_BE_STREAM (p, sdp_cb.max_recs_per_search);
/* Set continuation state */
UINT8_TO_BE_STREAM (p, cont_len);
/* if this is not the first request */
if (cont_len && p_cont) {
memcpy(p, p_cont, cont_len);
p += cont_len;
}
/* Go back and put the parameter length into the buffer */
param_len = (UINT16)(p - p_param_len - 2);
UINT16_TO_BE_STREAM (p_param_len, param_len);
p_ccb->disc_state = SDP_DISC_WAIT_HANDLES;
/* Set the length of the SDP data in the buffer */
p_cmd->len = (UINT16)(p - p_start);
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("sdp_snd_service_search_req cont_len :%d disc_state:%d\n", cont_len, p_ccb->disc_state);
#endif
L2CA_DataWrite (p_ccb->connection_id, p_cmd);
/* Start inactivity timer */
btu_start_timer (&p_ccb->timer_entry, BTU_TTYPE_SDP, SDP_INACT_TIMEOUT);
}
/*******************************************************************************
**
** Function sdp_disc_connected
**
** Description This function is called when an SDP discovery attempt is
** connected.
**
** Returns void
**
*******************************************************************************/
void sdp_disc_connected (tCONN_CB *p_ccb)
{
if (p_ccb->is_attr_search) {
p_ccb->disc_state = SDP_DISC_WAIT_SEARCH_ATTR;
process_service_search_attr_rsp (p_ccb, NULL);
} else {
/* First step is to get a list of the handles from the server. */
/* We are not searching for a specific attribute, so we will */
/* first search for the service, then get all attributes of it */
p_ccb->num_handles = 0;
sdp_snd_service_search_req(p_ccb, 0, NULL);
}
}
/*******************************************************************************
**
** Function sdp_disc_server_rsp
**
** Description This function is called when there is a response from
** the server.
**
** Returns void
**
*******************************************************************************/
void sdp_disc_server_rsp (tCONN_CB *p_ccb, BT_HDR *p_msg)
{
UINT8 *p, rsp_pdu;
BOOLEAN invalid_pdu = TRUE;
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("sdp_disc_server_rsp disc_state:%d\n", p_ccb->disc_state);
#endif
/* stop inactivity timer when we receive a response */
btu_stop_timer (&p_ccb->timer_entry);
/* Got a reply!! Check what we got back */
p = (UINT8 *)(p_msg + 1) + p_msg->offset;
BE_STREAM_TO_UINT8 (rsp_pdu, p);
p_msg->len--;
switch (rsp_pdu) {
case SDP_PDU_SERVICE_SEARCH_RSP:
if (p_ccb->disc_state == SDP_DISC_WAIT_HANDLES) {
process_service_search_rsp (p_ccb, p);
invalid_pdu = FALSE;
}
break;
case SDP_PDU_SERVICE_ATTR_RSP:
if (p_ccb->disc_state == SDP_DISC_WAIT_ATTR) {
process_service_attr_rsp (p_ccb, p);
invalid_pdu = FALSE;
}
break;
case SDP_PDU_SERVICE_SEARCH_ATTR_RSP:
if (p_ccb->disc_state == SDP_DISC_WAIT_SEARCH_ATTR) {
process_service_search_attr_rsp (p_ccb, p);
invalid_pdu = FALSE;
}
break;
}
if (invalid_pdu) {
SDP_TRACE_WARNING ("SDP - Unexp. PDU: %d in state: %d\n", rsp_pdu, p_ccb->disc_state);
sdp_disconnect (p_ccb, SDP_GENERIC_ERROR);
}
}
/******************************************************************************
**
** Function process_service_search_rsp
**
** Description This function is called when there is a search response from
** the server.
**
** Returns void
**
*******************************************************************************/
static void process_service_search_rsp (tCONN_CB *p_ccb, UINT8 *p_reply)
{
UINT16 xx;
UINT16 total, cur_handles, orig;
UINT8 cont_len;
/* Skip transaction, and param len */
p_reply += 4;
BE_STREAM_TO_UINT16 (total, p_reply);
BE_STREAM_TO_UINT16 (cur_handles, p_reply);
orig = p_ccb->num_handles;
p_ccb->num_handles += cur_handles;
if (p_ccb->num_handles == 0) {
SDP_TRACE_WARNING ("SDP - Rcvd ServiceSearchRsp, no matches\n");
sdp_disconnect (p_ccb, SDP_NO_RECS_MATCH);
return;
}
/* Save the handles that match. We will can only process a certain number. */
if (total > sdp_cb.max_recs_per_search) {
total = sdp_cb.max_recs_per_search;
}
if (p_ccb->num_handles > sdp_cb.max_recs_per_search) {
p_ccb->num_handles = sdp_cb.max_recs_per_search;
}
for (xx = orig; xx < p_ccb->num_handles; xx++) {
BE_STREAM_TO_UINT32 (p_ccb->handles[xx], p_reply);
}
BE_STREAM_TO_UINT8 (cont_len, p_reply);
if (cont_len != 0) {
if (cont_len > SDP_MAX_CONTINUATION_LEN) {
sdp_disconnect (p_ccb, SDP_INVALID_CONT_STATE);
return;
}
/* stay in the same state */
sdp_snd_service_search_req(p_ccb, cont_len, p_reply);
} else {
/* change state */
p_ccb->disc_state = SDP_DISC_WAIT_ATTR;
/* Kick off the first attribute request */
process_service_attr_rsp (p_ccb, NULL);
}
}
/*******************************************************************************
**
** Function sdp_copy_raw_data
**
** Description copy the raw data
**
**
** Returns void
**
*******************************************************************************/
#if (SDP_RAW_DATA_INCLUDED == TRUE)
static void sdp_copy_raw_data (tCONN_CB *p_ccb, BOOLEAN offset)
{
unsigned int cpy_len;
UINT32 list_len;
UINT8 *p;
UINT8 type;
#if (SDP_DEBUG_RAW == TRUE)
UINT8 num_array[SDP_MAX_LIST_BYTE_COUNT];
UINT32 i;
for (i = 0; i < p_ccb->list_len; i++) {
sprintf((char *)&num_array[i * 2], "%02X\n", (UINT8)(p_ccb->rsp_list[i]));
}
SDP_TRACE_WARNING("result :%s\n", num_array);
#endif
if (p_ccb->p_db->raw_data) {
cpy_len = p_ccb->p_db->raw_size - p_ccb->p_db->raw_used;
list_len = p_ccb->list_len;
p = &p_ccb->rsp_list[0];
if (offset) {
type = *p++;
p = sdpu_get_len_from_type (p, type, &list_len);
}
if (list_len < cpy_len ) {
cpy_len = list_len;
}
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_DEBUG("list_len :%d cpy_len:%d raw_size:%d raw_used:%d\n",
list_len, cpy_len, p_ccb->p_db->raw_size, p_ccb->p_db->raw_used);
#endif
if (cpy_len != 0){
memcpy (&p_ccb->p_db->raw_data[p_ccb->p_db->raw_used], p, cpy_len);
p_ccb->p_db->raw_used += cpy_len;
}
}
}
#endif
/*******************************************************************************
**
** Function process_service_attr_rsp
**
** Description This function is called when there is a attribute response from
** the server.
**
** Returns void
**
*******************************************************************************/
static void process_service_attr_rsp (tCONN_CB *p_ccb, UINT8 *p_reply)
{
UINT8 *p_start, *p_param_len;
UINT16 param_len, list_byte_count;
BOOLEAN cont_request_needed = FALSE;
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("process_service_attr_rsp raw inc:%d\n",
SDP_RAW_DATA_INCLUDED);
#endif
/* If p_reply is NULL, we were called after the records handles were read */
if (p_reply) {
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("ID & len: 0x%02x-%02x-%02x-%02x\n",
p_reply[0], p_reply[1], p_reply[2], p_reply[3]);
#endif
/* Skip transaction ID and length */
p_reply += 4;
BE_STREAM_TO_UINT16 (list_byte_count, p_reply);
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("list_byte_count:%d\n", list_byte_count);
#endif
/* Copy the response to the scratchpad. First, a safety check on the length */
if ((p_ccb->list_len + list_byte_count) > SDP_MAX_LIST_BYTE_COUNT) {
sdp_disconnect (p_ccb, SDP_INVALID_PDU_SIZE);
return;
}
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("list_len: %d, list_byte_count: %d\n",
p_ccb->list_len, list_byte_count);
#endif
if (p_ccb->rsp_list == NULL) {
p_ccb->rsp_list = (UINT8 *)osi_malloc (SDP_MAX_LIST_BYTE_COUNT);
if (p_ccb->rsp_list == NULL) {
SDP_TRACE_ERROR ("SDP - no gki buf to save rsp\n");
sdp_disconnect (p_ccb, SDP_NO_RESOURCES);
return;
}
}
memcpy (&p_ccb->rsp_list[p_ccb->list_len], p_reply, list_byte_count);
p_ccb->list_len += list_byte_count;
p_reply += list_byte_count;
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("list_len: %d(attr_rsp)\n", p_ccb->list_len);
/* Check if we need to request a continuation */
SDP_TRACE_WARNING("*p_reply:%d(%d)\n", *p_reply, SDP_MAX_CONTINUATION_LEN);
#endif
if (*p_reply) {
if (*p_reply > SDP_MAX_CONTINUATION_LEN) {
sdp_disconnect (p_ccb, SDP_INVALID_CONT_STATE);
return;
}
cont_request_needed = TRUE;
} else {
#if (SDP_RAW_DATA_INCLUDED == TRUE)
SDP_TRACE_WARNING("process_service_attr_rsp\n");
sdp_copy_raw_data (p_ccb, FALSE);
#endif
/* Save the response in the database. Stop on any error */
if (!save_attr_seq (p_ccb, &p_ccb->rsp_list[0], &p_ccb->rsp_list[p_ccb->list_len])) {
sdp_disconnect (p_ccb, SDP_DB_FULL);
return;
}
p_ccb->list_len = 0;
p_ccb->cur_handle++;
}
}
/* Now, ask for the next handle. Re-use the buffer we just got. */
if (p_ccb->cur_handle < p_ccb->num_handles) {
BT_HDR *p_msg = (BT_HDR *) osi_malloc(SDP_DATA_BUF_SIZE);
UINT8 *p;
if (!p_msg) {
sdp_disconnect (p_ccb, SDP_NO_RESOURCES);
return;
}
p_msg->offset = L2CAP_MIN_OFFSET;
p = p_start = (UINT8 *)(p_msg + 1) + L2CAP_MIN_OFFSET;
/* Get all the attributes from the server */
UINT8_TO_BE_STREAM (p, SDP_PDU_SERVICE_ATTR_REQ);
UINT16_TO_BE_STREAM (p, p_ccb->transaction_id);
p_ccb->transaction_id++;
/* Skip the length, we need to add it at the end */
p_param_len = p;
p += 2;
UINT32_TO_BE_STREAM (p, p_ccb->handles[p_ccb->cur_handle]);
/* Max attribute byte count */
UINT16_TO_BE_STREAM (p, sdp_cb.max_attr_list_size);
/* If no attribute filters, build a wildcard attribute sequence */
if (p_ccb->p_db->num_attr_filters) {
p = sdpu_build_attrib_seq (p, p_ccb->p_db->attr_filters, p_ccb->p_db->num_attr_filters);
} else {
p = sdpu_build_attrib_seq (p, NULL, 0);
}
/* Was this a continuation request ? */
if (cont_request_needed) {
memcpy (p, p_reply, *p_reply + 1);
p += *p_reply + 1;
} else {
UINT8_TO_BE_STREAM (p, 0);
}
/* Go back and put the parameter length into the buffer */
param_len = (UINT16)(p - p_param_len - 2);
UINT16_TO_BE_STREAM (p_param_len, param_len);
/* Set the length of the SDP data in the buffer */
p_msg->len = (UINT16)(p - p_start);
L2CA_DataWrite (p_ccb->connection_id, p_msg);
/* Start inactivity timer */
btu_start_timer (&p_ccb->timer_entry, BTU_TTYPE_SDP, SDP_INACT_TIMEOUT);
} else {
sdp_disconnect (p_ccb, SDP_SUCCESS);
return;
}
}
/*******************************************************************************
**
** Function process_service_search_attr_rsp
**
** Description This function is called when there is a search attribute
** response from the server.
**
** Returns void
**
*******************************************************************************/
static void process_service_search_attr_rsp (tCONN_CB *p_ccb, UINT8 *p_reply)
{
UINT8 *p, *p_start, *p_end, *p_param_len;
UINT8 type;
UINT32 seq_len;
UINT16 param_len, lists_byte_count = 0;
BOOLEAN cont_request_needed = FALSE;
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("process_service_search_attr_rsp\n");
#endif
/* If p_reply is NULL, we were called for the initial read */
if (p_reply) {
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("ID & len: 0x%02x-%02x-%02x-%02x\n",
p_reply[0], p_reply[1], p_reply[2], p_reply[3]);
#endif
/* Skip transaction ID and length */
p_reply += 4;
BE_STREAM_TO_UINT16 (lists_byte_count, p_reply);
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("lists_byte_count:%d\n", lists_byte_count);
#endif
/* Copy the response to the scratchpad. First, a safety check on the length */
if ((p_ccb->list_len + lists_byte_count) > SDP_MAX_LIST_BYTE_COUNT) {
sdp_disconnect (p_ccb, SDP_INVALID_PDU_SIZE);
return;
}
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("list_len: %d, list_byte_count: %d\n",
p_ccb->list_len, lists_byte_count);
#endif
if (p_ccb->rsp_list == NULL) {
p_ccb->rsp_list = (UINT8 *)osi_malloc (SDP_MAX_LIST_BYTE_COUNT);
if (p_ccb->rsp_list == NULL) {
SDP_TRACE_ERROR ("SDP - no gki buf to save rsp\n");
sdp_disconnect (p_ccb, SDP_NO_RESOURCES);
return;
}
}
memcpy (&p_ccb->rsp_list[p_ccb->list_len], p_reply, lists_byte_count);
p_ccb->list_len += lists_byte_count;
p_reply += lists_byte_count;
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("list_len: %d(search_attr_rsp)\n", p_ccb->list_len);
/* Check if we need to request a continuation */
SDP_TRACE_WARNING("*p_reply:%d(%d)\n", *p_reply, SDP_MAX_CONTINUATION_LEN);
#endif
if (*p_reply) {
if (*p_reply > SDP_MAX_CONTINUATION_LEN) {
sdp_disconnect (p_ccb, SDP_INVALID_CONT_STATE);
return;
}
cont_request_needed = TRUE;
}
}
#if (SDP_DEBUG_RAW == TRUE)
SDP_TRACE_WARNING("cont_request_needed:%d\n", cont_request_needed);
#endif
/* If continuation request (or first time request) */
if ((cont_request_needed) || (!p_reply)) {
BT_HDR *p_msg = (BT_HDR *) osi_malloc(SDP_DATA_BUF_SIZE);
UINT8 *p;
if (!p_msg) {
sdp_disconnect (p_ccb, SDP_NO_RESOURCES);
return;
}
p_msg->offset = L2CAP_MIN_OFFSET;
p = p_start = (UINT8 *)(p_msg + 1) + L2CAP_MIN_OFFSET;
/* Build a service search request packet */
UINT8_TO_BE_STREAM (p, SDP_PDU_SERVICE_SEARCH_ATTR_REQ);
UINT16_TO_BE_STREAM (p, p_ccb->transaction_id);
p_ccb->transaction_id++;
/* Skip the length, we need to add it at the end */
p_param_len = p;
p += 2;
/* Build the UID sequence. */
#if (defined(SDP_BROWSE_PLUS) && SDP_BROWSE_PLUS == TRUE)
p = sdpu_build_uuid_seq (p, 1, &p_ccb->p_db->uuid_filters[p_ccb->cur_uuid_idx]);
#else
p = sdpu_build_uuid_seq (p, p_ccb->p_db->num_uuid_filters, p_ccb->p_db->uuid_filters);
#endif
/* Max attribute byte count */
UINT16_TO_BE_STREAM (p, sdp_cb.max_attr_list_size);
/* If no attribute filters, build a wildcard attribute sequence */
if (p_ccb->p_db->num_attr_filters) {
p = sdpu_build_attrib_seq (p, p_ccb->p_db->attr_filters, p_ccb->p_db->num_attr_filters);
} else {
p = sdpu_build_attrib_seq (p, NULL, 0);
}
/* No continuation for first request */
if (p_reply) {
memcpy (p, p_reply, *p_reply + 1);
p += *p_reply + 1;
} else {
UINT8_TO_BE_STREAM (p, 0);
}
/* Go back and put the parameter length into the buffer */
param_len = p - p_param_len - 2;
UINT16_TO_BE_STREAM (p_param_len, param_len);
/* Set the length of the SDP data in the buffer */
p_msg->len = p - p_start;
L2CA_DataWrite (p_ccb->connection_id, p_msg);
/* Start inactivity timer */
btu_start_timer (&p_ccb->timer_entry, BTU_TTYPE_SDP, SDP_INACT_TIMEOUT);
return;
}
/*******************************************************************/
/* We now have the full response, which is a sequence of sequences */
/*******************************************************************/
#if (SDP_RAW_DATA_INCLUDED == TRUE)
SDP_TRACE_DEBUG("process_service_search_attr_rsp\n");
sdp_copy_raw_data (p_ccb, TRUE);
#endif
p = &p_ccb->rsp_list[0];
/* The contents is a sequence of attribute sequences */
type = *p++;
if ((type >> 3) != DATA_ELE_SEQ_DESC_TYPE) {
SDP_TRACE_WARNING ("SDP - Wrong type: 0x%02x in attr_rsp\n", type);
return;
}
p = sdpu_get_len_from_type (p, type, &seq_len);
p_end = &p_ccb->rsp_list[p_ccb->list_len];
if ((p + seq_len) != p_end) {
sdp_disconnect (p_ccb, SDP_INVALID_CONT_STATE);
return;
}
while (p < p_end) {
p = save_attr_seq (p_ccb, p, &p_ccb->rsp_list[p_ccb->list_len]);
if (!p) {
sdp_disconnect (p_ccb, SDP_DB_FULL);
return;
}
}
/* Since we got everything we need, disconnect the call */
sdp_disconnect (p_ccb, SDP_SUCCESS);
}
/*******************************************************************************
**
** Function save_attr_seq
**
** Description This function is called when there is a response from
** the server.
**
** Returns pointer to next byte or NULL if error
**
*******************************************************************************/
static UINT8 *save_attr_seq (tCONN_CB *p_ccb, UINT8 *p, UINT8 *p_msg_end)
{
UINT32 seq_len, attr_len;
UINT16 attr_id;
UINT8 type, *p_seq_end;
tSDP_DISC_REC *p_rec;
type = *p++;
if ((type >> 3) != DATA_ELE_SEQ_DESC_TYPE) {
SDP_TRACE_WARNING ("SDP - Wrong type: 0x%02x in attr_rsp\n", type);
return (NULL);
}
p = sdpu_get_len_from_type (p, type, &seq_len);
if ((p + seq_len) > p_msg_end) {
SDP_TRACE_WARNING ("SDP - Bad len in attr_rsp %d\n", seq_len);
return (NULL);
}
/* Create a record */
p_rec = add_record (p_ccb->p_db, p_ccb->device_address);
if (!p_rec) {
SDP_TRACE_WARNING ("SDP - DB full add_record\n");
return (NULL);
}
p_seq_end = p + seq_len;
while (p < p_seq_end) {
/* First get the attribute ID */
type = *p++;
p = sdpu_get_len_from_type (p, type, &attr_len);
if (((type >> 3) != UINT_DESC_TYPE) || (attr_len != 2)) {
SDP_TRACE_WARNING ("SDP - Bad type: 0x%02x or len: %d in attr_rsp\n", type, attr_len);
return (NULL);
}
BE_STREAM_TO_UINT16 (attr_id, p);
/* Now, add the attribute value */
p = add_attr (p, p_ccb->p_db, p_rec, attr_id, NULL, 0);
if (!p) {
SDP_TRACE_WARNING ("SDP - DB full add_attr\n");
return (NULL);
}
}
return (p);
}
/*******************************************************************************
**
** Function add_record
**
** Description This function allocates space for a record from the DB.
**
** Returns pointer to next byte in data stream
**
*******************************************************************************/
tSDP_DISC_REC *add_record (tSDP_DISCOVERY_DB *p_db, BD_ADDR p_bda)
{
tSDP_DISC_REC *p_rec;
/* See if there is enough space in the database */
if (p_db->mem_free < sizeof (tSDP_DISC_REC)) {
return (NULL);
}
p_rec = (tSDP_DISC_REC *) p_db->p_free_mem;
p_db->p_free_mem += sizeof (tSDP_DISC_REC);
p_db->mem_free -= sizeof (tSDP_DISC_REC);
p_rec->p_first_attr = NULL;
p_rec->p_next_rec = NULL;
memcpy (p_rec->remote_bd_addr, p_bda, BD_ADDR_LEN);
/* Add the record to the end of chain */
if (!p_db->p_first_rec) {
p_db->p_first_rec = p_rec;
} else {
tSDP_DISC_REC *p_rec1 = p_db->p_first_rec;
while (p_rec1->p_next_rec) {
p_rec1 = p_rec1->p_next_rec;
}
p_rec1->p_next_rec = p_rec;
}
return (p_rec);
}
#define SDP_ADDITIONAL_LIST_MASK 0x80
/*******************************************************************************
**
** Function add_attr
**
** Description This function allocates space for an attribute from the DB
** and copies the data into it.
**
** Returns pointer to next byte in data stream
**
*******************************************************************************/
static UINT8 *add_attr (UINT8 *p, tSDP_DISCOVERY_DB *p_db, tSDP_DISC_REC *p_rec,
UINT16 attr_id, tSDP_DISC_ATTR *p_parent_attr, UINT8 nest_level)
{
tSDP_DISC_ATTR *p_attr;
UINT32 attr_len;
UINT32 total_len;
UINT16 attr_type;
UINT16 id;
UINT8 type;
UINT8 *p_end;
UINT8 is_additional_list = nest_level & SDP_ADDITIONAL_LIST_MASK;
nest_level &= ~(SDP_ADDITIONAL_LIST_MASK);
type = *p++;
p = sdpu_get_len_from_type (p, type, &attr_len);
attr_len &= SDP_DISC_ATTR_LEN_MASK;
attr_type = (type >> 3) & 0x0f;
/* See if there is enough space in the database */
if (attr_len > 4) {
total_len = attr_len - 4 + (UINT16)sizeof (tSDP_DISC_ATTR);
} else {
total_len = sizeof (tSDP_DISC_ATTR);
}
/* Ensure it is a multiple of 4 */
total_len = (total_len + 3) & ~3;
/* See if there is enough space in the database */
if (p_db->mem_free < total_len) {
return (NULL);
}
p_attr = (tSDP_DISC_ATTR *) p_db->p_free_mem;
p_attr->attr_id = attr_id;
p_attr->attr_len_type = (UINT16)attr_len | (attr_type << 12);
p_attr->p_next_attr = NULL;
/* Store the attribute value */
switch (attr_type) {
case UINT_DESC_TYPE:
if ( (is_additional_list != 0) && (attr_len == 2) ) {
BE_STREAM_TO_UINT16 (id, p);
if (id != ATTR_ID_PROTOCOL_DESC_LIST) {
p -= 2;
} else {
/* Reserve the memory for the attribute now, as we need to add sub-attributes */
p_db->p_free_mem += sizeof (tSDP_DISC_ATTR);
p_db->mem_free -= sizeof (tSDP_DISC_ATTR);
p_end = p + attr_len;
total_len = 0;
/* SDP_TRACE_DEBUG ("SDP - attr nest level:%d(list)", nest_level); */
if (nest_level >= MAX_NEST_LEVELS) {
SDP_TRACE_ERROR ("SDP - attr nesting too deep\n");
return (p_end);
}
/* Now, add the list entry */
p = add_attr (p, p_db, p_rec, ATTR_ID_PROTOCOL_DESC_LIST, p_attr, (UINT8)(nest_level + 1));
break;
}
}
/* Case falls through */
case TWO_COMP_INT_DESC_TYPE:
switch (attr_len) {
case 1:
p_attr->attr_value.v.u8 = *p++;
break;
case 2:
BE_STREAM_TO_UINT16 (p_attr->attr_value.v.u16, p);
break;
case 4:
BE_STREAM_TO_UINT32 (p_attr->attr_value.v.u32, p);
break;
default:
BE_STREAM_TO_ARRAY (p, p_attr->attr_value.v.array, (INT32)attr_len);
break;
}
break;
case UUID_DESC_TYPE:
switch (attr_len) {
case 2:
BE_STREAM_TO_UINT16 (p_attr->attr_value.v.u16, p);
break;
case 4:
BE_STREAM_TO_UINT32 (p_attr->attr_value.v.u32, p);
if (p_attr->attr_value.v.u32 < 0x10000) {
attr_len = 2;
p_attr->attr_len_type = (UINT16)attr_len | (attr_type << 12);
p_attr->attr_value.v.u16 = (UINT16) p_attr->attr_value.v.u32;
}
break;
case 16:
/* See if we can compress his UUID down to 16 or 32bit UUIDs */
if (sdpu_is_base_uuid (p)) {
if ((p[0] == 0) && (p[1] == 0)) {
p_attr->attr_len_type = (p_attr->attr_len_type & ~SDP_DISC_ATTR_LEN_MASK) | 2;
p += 2;
BE_STREAM_TO_UINT16 (p_attr->attr_value.v.u16, p);
p += MAX_UUID_SIZE - 4;
} else {
p_attr->attr_len_type = (p_attr->attr_len_type & ~SDP_DISC_ATTR_LEN_MASK) | 4;
BE_STREAM_TO_UINT32 (p_attr->attr_value.v.u32, p);
p += MAX_UUID_SIZE - 4;
}
} else {
/* coverity[overrun-local] */
/*
Event overrun-local: Overrun of static array "p_attr->attr_value.v.array" of size 4 at position 15 with index variable "ijk"
False-positive: SDP uses scratch buffer to hold the attribute value.
The actual size of tSDP_DISC_ATVAL does not matter.
If the array size in tSDP_DISC_ATVAL is increase, we would increase the system RAM usage unnecessarily
*/
BE_STREAM_TO_ARRAY (p, p_attr->attr_value.v.array, (INT32)attr_len);
}
break;
default:
SDP_TRACE_WARNING ("SDP - bad len in UUID attr: %d\n", attr_len);
return (p + attr_len);
}
break;
case DATA_ELE_SEQ_DESC_TYPE:
case DATA_ELE_ALT_DESC_TYPE:
/* Reserve the memory for the attribute now, as we need to add sub-attributes */
p_db->p_free_mem += sizeof (tSDP_DISC_ATTR);
p_db->mem_free -= sizeof (tSDP_DISC_ATTR);
p_end = p + attr_len;
total_len = 0;
/* SDP_TRACE_DEBUG ("SDP - attr nest level:%d", nest_level); */
if (nest_level >= MAX_NEST_LEVELS) {
SDP_TRACE_ERROR ("SDP - attr nesting too deep\n");
return (p_end);
}
if (is_additional_list != 0 || attr_id == ATTR_ID_ADDITION_PROTO_DESC_LISTS) {
nest_level |= SDP_ADDITIONAL_LIST_MASK;
}
/* SDP_TRACE_DEBUG ("SDP - attr nest level:0x%x(finish)", nest_level); */
while (p < p_end) {
/* Now, add the list entry */
p = add_attr (p, p_db, p_rec, 0, p_attr, (UINT8)(nest_level + 1));
if (!p) {
return (NULL);
}
}
break;
case TEXT_STR_DESC_TYPE:
case URL_DESC_TYPE:
BE_STREAM_TO_ARRAY (p, p_attr->attr_value.v.array, (INT32)attr_len);
break;
case BOOLEAN_DESC_TYPE:
switch (attr_len) {
case 1:
p_attr->attr_value.v.u8 = *p++;
break;
default:
SDP_TRACE_WARNING ("SDP - bad len in boolean attr: %d\n", attr_len);
return (p + attr_len);
}
break;
default: /* switch (attr_type) */
break;
}
p_db->p_free_mem += total_len;
p_db->mem_free -= total_len;
/* Add the attribute to the end of the chain */
if (!p_parent_attr) {
if (!p_rec->p_first_attr) {
p_rec->p_first_attr = p_attr;
} else {
tSDP_DISC_ATTR *p_attr1 = p_rec->p_first_attr;
while (p_attr1->p_next_attr) {
p_attr1 = p_attr1->p_next_attr;
}
p_attr1->p_next_attr = p_attr;
}
} else {
if (!p_parent_attr->attr_value.v.p_sub_attr) {
p_parent_attr->attr_value.v.p_sub_attr = p_attr;
/* SDP_TRACE_DEBUG ("parent:0x%x(id:%d), ch:0x%x(id:%d)",
p_parent_attr, p_parent_attr->attr_id, p_attr, p_attr->attr_id); */
} else {
tSDP_DISC_ATTR *p_attr1 = p_parent_attr->attr_value.v.p_sub_attr;
/* SDP_TRACE_DEBUG ("parent:0x%x(id:%d), ch1:0x%x(id:%d)",
p_parent_attr, p_parent_attr->attr_id, p_attr1, p_attr1->attr_id); */
while (p_attr1->p_next_attr) {
p_attr1 = p_attr1->p_next_attr;
}
p_attr1->p_next_attr = p_attr;
/* SDP_TRACE_DEBUG ("new ch:0x%x(id:%d)", p_attr, p_attr->attr_id); */
}
}
return (p);
}
#endif /* CLIENT_ENABLED == TRUE */
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