alex/esp-idf
alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2024-10-05 20:47:46 -04:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity
8e77c39deb
esp-idf/components/bt/bluedroid/stack/sdp/sdp_utils.c
wangmengyang 2d15803f70 component/bt: add new demo for Bluetooth SDP client 
1. add Bluetooth SDP client demo;
2. some minor typo fixes
2016-10-31 12:34:11 +08:00

1063 lines
30 KiB
C
Executable File
Raw Blame History

/******************************************************************************
*
* 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 utility functions
*
******************************************************************************/
#include <stdlib.h>
#include <string.h>
//#include <netinet/in.h>
//#include <stdio.h>
#include "bt_defs.h"
#include "gki.h"
#include "bt_types.h"
#include "l2cdefs.h"
#include "hcidefs.h"
#include "hcimsgs.h"
#include "sdp_api.h"
#include "sdpint.h"
#include "btu.h"
static const UINT8 sdp_base_uuid[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
0x80, 0x00, 0x00, 0x80, 0x5F, 0x9B, 0x34, 0xFB};
/*******************************************************************************
**
** Function sdpu_find_ccb_by_cid
**
** Description This function searches the CCB table for an entry with the
** passed CID.
**
** Returns the CCB address, or NULL if not found.
**
*******************************************************************************/
tCONN_CB *sdpu_find_ccb_by_cid (UINT16 cid)
{
UINT16 xx;
tCONN_CB *p_ccb;
/* Look through each connection control block */
for (xx = 0, p_ccb = sdp_cb.ccb; xx < SDP_MAX_CONNECTIONS; xx++, p_ccb++)
{
if ((p_ccb->con_state != SDP_STATE_IDLE) && (p_ccb->connection_id == cid))
return (p_ccb);
}
/* If here, not found */
return (NULL);
}
/*******************************************************************************
**
** Function sdpu_find_ccb_by_db
**
** Description This function searches the CCB table for an entry with the
** passed discovery db.
**
** Returns the CCB address, or NULL if not found.
**
*******************************************************************************/
tCONN_CB *sdpu_find_ccb_by_db (tSDP_DISCOVERY_DB *p_db)
{
#if SDP_CLIENT_ENABLED == TRUE
UINT16 xx;
tCONN_CB *p_ccb;
if (p_db)
{
/* Look through each connection control block */
for (xx = 0, p_ccb = sdp_cb.ccb; xx < SDP_MAX_CONNECTIONS; xx++, p_ccb++)
{
if ((p_ccb->con_state != SDP_STATE_IDLE) && (p_ccb->p_db == p_db))
return (p_ccb);
}
}
#endif
/* If here, not found */
return (NULL);
}
/*******************************************************************************
**
** Function sdpu_allocate_ccb
**
** Description This function allocates a new CCB.
**
** Returns CCB address, or NULL if none available.
**
*******************************************************************************/
tCONN_CB *sdpu_allocate_ccb (void)
{
UINT16 xx;
tCONN_CB *p_ccb;
/* Look through each connection control block for a free one */
for (xx = 0, p_ccb = sdp_cb.ccb; xx < SDP_MAX_CONNECTIONS; xx++, p_ccb++)
{
if (p_ccb->con_state == SDP_STATE_IDLE)
{
memset (p_ccb, 0, sizeof (tCONN_CB));
p_ccb->timer_entry.param = (UINT32) p_ccb;
return (p_ccb);
}
}
/* If here, no free CCB found */
return (NULL);
}
/*******************************************************************************
**
** Function sdpu_release_ccb
**
** Description This function releases a CCB.
**
** Returns void
**
*******************************************************************************/
void sdpu_release_ccb (tCONN_CB *p_ccb)
{
/* Ensure timer is stopped */
btu_stop_timer (&p_ccb->timer_entry);
/* Drop any response pointer we may be holding */
p_ccb->con_state = SDP_STATE_IDLE;
#if SDP_CLIENT_ENABLED == TRUE
p_ccb->is_attr_search = FALSE;
#endif
/* Free the response buffer */
if (p_ccb->rsp_list)
{
SDP_TRACE_DEBUG("releasing SDP rsp_list\n");
GKI_freebuf(p_ccb->rsp_list);
p_ccb->rsp_list = NULL;
}
}
/*******************************************************************************
**
** Function sdpu_build_attrib_seq
**
** Description This function builds an attribute sequence from the list of
** passed attributes. It is also passed the address of the output
** buffer.
**
** Returns Pointer to next byte in the output buffer.
**
*******************************************************************************/
UINT8 *sdpu_build_attrib_seq (UINT8 *p_out, UINT16 *p_attr, UINT16 num_attrs)
{
UINT16 xx;
/* First thing is the data element header. See if the length fits 1 byte */
/* If no attributes, assume a 4-byte wildcard */
if (!p_attr)
xx = 5;
else
xx = num_attrs * 3;
if (xx > 255)
{
UINT8_TO_BE_STREAM (p_out, (DATA_ELE_SEQ_DESC_TYPE << 3) | SIZE_IN_NEXT_WORD);
UINT16_TO_BE_STREAM (p_out, xx);
}
else
{
UINT8_TO_BE_STREAM (p_out, (DATA_ELE_SEQ_DESC_TYPE << 3) | SIZE_IN_NEXT_BYTE);
UINT8_TO_BE_STREAM (p_out, xx);
}
/* If there are no attributes specified, assume caller wants wildcard */
if (!p_attr)
{
UINT8_TO_BE_STREAM (p_out, (UINT_DESC_TYPE << 3) | SIZE_FOUR_BYTES);
UINT16_TO_BE_STREAM (p_out, 0);
UINT16_TO_BE_STREAM (p_out, 0xFFFF);
}
else
{
/* Loop through and put in all the attributes(s) */
for (xx = 0; xx < num_attrs; xx++, p_attr++)
{
UINT8_TO_BE_STREAM (p_out, (UINT_DESC_TYPE << 3) | SIZE_TWO_BYTES);
UINT16_TO_BE_STREAM (p_out, *p_attr);
}
}
return (p_out);
}
/*******************************************************************************
**
** Function sdpu_build_attrib_entry
**
** Description This function builds an attribute entry from the passed
** attribute record. It is also passed the address of the output
** buffer.
**
** Returns Pointer to next byte in the output buffer.
**
*******************************************************************************/
UINT8 *sdpu_build_attrib_entry (UINT8 *p_out, tSDP_ATTRIBUTE *p_attr)
{
/* First, store the attribute ID. Goes as a UINT */
UINT8_TO_BE_STREAM (p_out, (UINT_DESC_TYPE << 3) | SIZE_TWO_BYTES);
UINT16_TO_BE_STREAM (p_out, p_attr->id);
/* the attribute is in the db record.
* assuming the attribute len is less than SDP_MAX_ATTR_LEN */
switch(p_attr->type)
{
case TEXT_STR_DESC_TYPE: /* 4 */
case DATA_ELE_SEQ_DESC_TYPE:/* 6 */
case DATA_ELE_ALT_DESC_TYPE:/* 7 */
case URL_DESC_TYPE: /* 8 */
#if (SDP_MAX_ATTR_LEN > 0xFFFF)
if(p_attr->len > 0xFFFF)
{
UINT8_TO_BE_STREAM (p_out, (p_attr->type << 3) | SIZE_IN_NEXT_LONG);
UINT32_TO_BE_STREAM (p_out, p_attr->len);
}
else
#endif /* 0xFFFF - 0xFF */
#if (SDP_MAX_ATTR_LEN > 0xFF)
if(p_attr->len > 0xFF)
{
UINT8_TO_BE_STREAM (p_out, (p_attr->type << 3) | SIZE_IN_NEXT_WORD);
UINT16_TO_BE_STREAM (p_out, p_attr->len);
}
else
#endif /* 0xFF and less*/
{
UINT8_TO_BE_STREAM (p_out, (p_attr->type << 3) | SIZE_IN_NEXT_BYTE);
UINT8_TO_BE_STREAM (p_out, p_attr->len);
}
if (p_attr->value_ptr != NULL) {
ARRAY_TO_BE_STREAM (p_out, p_attr->value_ptr, (int)p_attr->len);
}
return (p_out);
}
/* Now, store the attribute value */
switch (p_attr->len)
{
case 1:
UINT8_TO_BE_STREAM (p_out, (p_attr->type << 3) | SIZE_ONE_BYTE);
break;
case 2:
UINT8_TO_BE_STREAM (p_out, (p_attr->type << 3) | SIZE_TWO_BYTES);
break;
case 4:
UINT8_TO_BE_STREAM (p_out, (p_attr->type << 3) | SIZE_FOUR_BYTES);
break;
case 8:
UINT8_TO_BE_STREAM (p_out, (p_attr->type << 3) | SIZE_EIGHT_BYTES);
break;
case 16:
UINT8_TO_BE_STREAM (p_out, (p_attr->type << 3) | SIZE_SIXTEEN_BYTES);
break;
default:
UINT8_TO_BE_STREAM (p_out, (p_attr->type << 3) | SIZE_IN_NEXT_BYTE);
UINT8_TO_BE_STREAM (p_out, p_attr->len);
break;
}
if (p_attr->value_ptr != NULL) {
ARRAY_TO_BE_STREAM (p_out, p_attr->value_ptr, (int)p_attr->len);
}
return (p_out);
}
/*******************************************************************************
**
** Function sdpu_build_n_send_error
**
** Description This function builds and sends an error packet.
**
** Returns void
**
*******************************************************************************/
void sdpu_build_n_send_error (tCONN_CB *p_ccb, UINT16 trans_num, UINT16 error_code, char *p_error_text)
{
UINT8 *p_rsp, *p_rsp_start, *p_rsp_param_len;
UINT16 rsp_param_len;
BT_HDR *p_buf;
SDP_TRACE_WARNING ("SDP - sdpu_build_n_send_error code: 0x%x CID: 0x%x\n",
error_code, p_ccb->connection_id);
/* Get a buffer to use to build and send the packet to L2CAP */
if ((p_buf = (BT_HDR *)GKI_getpoolbuf (SDP_POOL_ID)) == NULL)
{
SDP_TRACE_ERROR ("SDP - no buf for err msg\n");
return;
}
p_buf->offset = L2CAP_MIN_OFFSET;
p_rsp = p_rsp_start = (UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET;
UINT8_TO_BE_STREAM (p_rsp, SDP_PDU_ERROR_RESPONSE);
UINT16_TO_BE_STREAM (p_rsp, trans_num);
/* Skip the parameter length, we need to add it at the end */
p_rsp_param_len = p_rsp;
p_rsp += 2;
UINT16_TO_BE_STREAM (p_rsp, error_code);
/* Unplugfest example traces do not have any error text */
if (p_error_text)
ARRAY_TO_BE_STREAM (p_rsp, p_error_text, (int) strlen (p_error_text));
/* Go back and put the parameter length into the buffer */
rsp_param_len = p_rsp - p_rsp_param_len - 2;
UINT16_TO_BE_STREAM (p_rsp_param_len, rsp_param_len);
/* Set the length of the SDP data in the buffer */
p_buf->len = p_rsp - p_rsp_start;
/* Send the buffer through L2CAP */
L2CA_DataWrite (p_ccb->connection_id, p_buf);
}
/*******************************************************************************
**
** Function sdpu_extract_uid_seq
**
** Description This function extracts a UUID sequence from the passed input
** buffer, and puts it into the passed output list.
**
** Returns Pointer to next byte in the input buffer after the sequence.
**
*******************************************************************************/
UINT8 *sdpu_extract_uid_seq (UINT8 *p, UINT16 param_len, tSDP_UUID_SEQ *p_seq)
{
UINT8 *p_seq_end;
UINT8 descr, type, size;
UINT32 seq_len, uuid_len;
/* Assume none found */
p_seq->num_uids = 0;
/* A UID sequence is composed of a bunch of UIDs. */
BE_STREAM_TO_UINT8 (descr, p);
type = descr >> 3;
size = descr & 7;
if (type != DATA_ELE_SEQ_DESC_TYPE)
return (NULL);
switch (size)
{
case SIZE_TWO_BYTES:
seq_len = 2;
break;
case SIZE_FOUR_BYTES:
seq_len = 4;
break;
case SIZE_SIXTEEN_BYTES:
seq_len = 16;
break;
case SIZE_IN_NEXT_BYTE:
BE_STREAM_TO_UINT8 (seq_len, p);
break;
case SIZE_IN_NEXT_WORD:
BE_STREAM_TO_UINT16 (seq_len, p);
break;
case SIZE_IN_NEXT_LONG:
BE_STREAM_TO_UINT32 (seq_len, p);
break;
default:
return (NULL);
}
if (seq_len >= param_len)
return (NULL);
p_seq_end = p + seq_len;
/* Loop through, extracting the UIDs */
for ( ; p < p_seq_end ; )
{
BE_STREAM_TO_UINT8 (descr, p);
type = descr >> 3;
size = descr & 7;
if (type != UUID_DESC_TYPE)
return (NULL);
switch (size)
{
case SIZE_TWO_BYTES:
uuid_len = 2;
break;
case SIZE_FOUR_BYTES:
uuid_len = 4;
break;
case SIZE_SIXTEEN_BYTES:
uuid_len = 16;
break;
case SIZE_IN_NEXT_BYTE:
BE_STREAM_TO_UINT8 (uuid_len, p);
break;
case SIZE_IN_NEXT_WORD:
BE_STREAM_TO_UINT16 (uuid_len, p);
break;
case SIZE_IN_NEXT_LONG:
BE_STREAM_TO_UINT32 (uuid_len, p);
break;
default:
return (NULL);
}
/* If UUID length is valid, copy it across */
if ((uuid_len == 2) || (uuid_len == 4) || (uuid_len == 16))
{
p_seq->uuid_entry[p_seq->num_uids].len = (UINT16) uuid_len;
BE_STREAM_TO_ARRAY (p, p_seq->uuid_entry[p_seq->num_uids].value, (int)uuid_len);
p_seq->num_uids++;
}
else
return (NULL);
/* We can only do so many */
if (p_seq->num_uids >= MAX_UUIDS_PER_SEQ)
return (NULL);
}
if (p != p_seq_end)
return (NULL);
return (p);
}
/*******************************************************************************
**
** Function sdpu_extract_attr_seq
**
** Description This function extracts an attribute sequence from the passed
** input buffer, and puts it into the passed output list.
**
** Returns Pointer to next byte in the input buffer after the sequence.
**
*******************************************************************************/
UINT8 *sdpu_extract_attr_seq (UINT8 *p, UINT16 param_len, tSDP_ATTR_SEQ *p_seq)
{
UINT8 *p_end_list;
UINT8 descr, type, size;
UINT32 list_len, attr_len;
/* Assume none found */
p_seq->num_attr = 0;
/* Get attribute sequence info */
BE_STREAM_TO_UINT8 (descr, p);
type = descr >> 3;
size = descr & 7;
if (type != DATA_ELE_SEQ_DESC_TYPE)
return (p);
switch (size)
{
case SIZE_IN_NEXT_BYTE:
BE_STREAM_TO_UINT8 (list_len, p);
break;
case SIZE_IN_NEXT_WORD:
BE_STREAM_TO_UINT16 (list_len, p);
break;
case SIZE_IN_NEXT_LONG:
BE_STREAM_TO_UINT32 (list_len, p);
break;
default:
return (p);
}
if (list_len > param_len)
return (p);
p_end_list = p + list_len;
/* Loop through, extracting the attribute IDs */
for ( ; p < p_end_list ; )
{
BE_STREAM_TO_UINT8 (descr, p);
type = descr >> 3;
size = descr & 7;
if (type != UINT_DESC_TYPE)
return (p);
switch (size)
{
case SIZE_TWO_BYTES:
attr_len = 2;
break;
case SIZE_FOUR_BYTES:
attr_len = 4;
break;
case SIZE_IN_NEXT_BYTE:
BE_STREAM_TO_UINT8 (attr_len, p);
break;
case SIZE_IN_NEXT_WORD:
BE_STREAM_TO_UINT16 (attr_len, p);
break;
case SIZE_IN_NEXT_LONG:
BE_STREAM_TO_UINT32 (attr_len, p);
break;
default:
return (NULL);
break;
}
/* Attribute length must be 2-bytes or 4-bytes for a paired entry. */
if (attr_len == 2)
{
BE_STREAM_TO_UINT16 (p_seq->attr_entry[p_seq->num_attr].start, p);
p_seq->attr_entry[p_seq->num_attr].end = p_seq->attr_entry[p_seq->num_attr].start;
}
else if (attr_len == 4)
{
BE_STREAM_TO_UINT16 (p_seq->attr_entry[p_seq->num_attr].start, p);
BE_STREAM_TO_UINT16 (p_seq->attr_entry[p_seq->num_attr].end, p);
}
else
return (NULL);
/* We can only do so many */
if (++p_seq->num_attr >= MAX_ATTR_PER_SEQ)
return (NULL);
}
return (p);
}
/*******************************************************************************
**
** Function sdpu_get_len_from_type
**
** Description This function gets the length
**
** Returns void
**
*******************************************************************************/
UINT8 *sdpu_get_len_from_type (UINT8 *p, UINT8 type, UINT32 *p_len)
{
UINT8 u8;
UINT16 u16;
UINT32 u32;
switch (type & 7)
{
case SIZE_ONE_BYTE:
*p_len = 1;
break;
case SIZE_TWO_BYTES:
*p_len = 2;
break;
case SIZE_FOUR_BYTES:
*p_len = 4;
break;
case SIZE_EIGHT_BYTES:
*p_len = 8;
break;
case SIZE_SIXTEEN_BYTES:
*p_len = 16;
break;
case SIZE_IN_NEXT_BYTE:
BE_STREAM_TO_UINT8 (u8, p);
*p_len = u8;
break;
case SIZE_IN_NEXT_WORD:
BE_STREAM_TO_UINT16 (u16, p);
*p_len = u16;
break;
case SIZE_IN_NEXT_LONG:
BE_STREAM_TO_UINT32 (u32, p);
*p_len = (UINT16) u32;
break;
}
return (p);
}
/*******************************************************************************
**
** Function sdpu_is_base_uuid
**
** Description This function checks a 128-bit UUID with the base to see if
** it matches. Only the last 12 bytes are compared.
**
** Returns TRUE if matched, else FALSE
**
*******************************************************************************/
BOOLEAN sdpu_is_base_uuid (UINT8 *p_uuid)
{
UINT16 xx;
for (xx = 4; xx < MAX_UUID_SIZE; xx++)
if (p_uuid[xx] != sdp_base_uuid[xx])
return (FALSE);
/* If here, matched */
return (TRUE);
}
/*******************************************************************************
**
** Function sdpu_compare_uuid_arrays
**
** Description This function compares 2 BE UUIDs. If needed, they are expanded
** to 128-bit UUIDs, then compared.
**
** NOTE it is assumed that the arrays are in Big Endian format
**
** Returns TRUE if matched, else FALSE
**
*******************************************************************************/
BOOLEAN sdpu_compare_uuid_arrays (UINT8 *p_uuid1, UINT32 len1, UINT8 *p_uuid2, UINT16 len2)
{
UINT8 nu1[MAX_UUID_SIZE];
UINT8 nu2[MAX_UUID_SIZE];
if( ((len1 != 2) && (len1 != 4) && (len1 != 16)) ||
((len2 != 2) && (len2 != 4) && (len2 != 16)) )
{
SDP_TRACE_ERROR("%s: invalid length\n", __func__);
return FALSE;
}
/* If lengths match, do a straight compare */
if (len1 == len2)
{
if (len1 == 2)
return ((p_uuid1[0] == p_uuid2[0]) && (p_uuid1[1] == p_uuid2[1]));
if (len1 == 4)
return ( (p_uuid1[0] == p_uuid2[0]) && (p_uuid1[1] == p_uuid2[1])
&& (p_uuid1[2] == p_uuid2[2]) && (p_uuid1[3] == p_uuid2[3]) );
else
return (memcmp (p_uuid1, p_uuid2, (size_t)len1) == 0);
}
else if (len1 > len2)
{
/* If the len1 was 4-byte, (so len2 is 2-byte), compare on the fly */
if (len1 == 4)
{
return ( (p_uuid1[0] == 0) && (p_uuid1[1] == 0)
&& (p_uuid1[2] == p_uuid2[0]) && (p_uuid1[3] == p_uuid2[1]) );
}
else
{
/* Normalize UUIDs to 16-byte form, then compare. Len1 must be 16 */
memcpy (nu1, p_uuid1, MAX_UUID_SIZE);
memcpy (nu2, sdp_base_uuid, MAX_UUID_SIZE);
if (len2 == 4)
memcpy (nu2, p_uuid2, len2);
else if (len2 == 2)
memcpy (nu2 + 2, p_uuid2, len2);
return (memcmp (nu1, nu2, MAX_UUID_SIZE) == 0);
}
}
else
{
/* len2 is greater than len1 */
/* If the len2 was 4-byte, (so len1 is 2-byte), compare on the fly */
if (len2 == 4)
{
return ( (p_uuid2[0] == 0) && (p_uuid2[1] == 0)
&& (p_uuid2[2] == p_uuid1[0]) && (p_uuid2[3] == p_uuid1[1]) );
}
else
{
/* Normalize UUIDs to 16-byte form, then compare. Len1 must be 16 */
memcpy (nu2, p_uuid2, MAX_UUID_SIZE);
memcpy (nu1, sdp_base_uuid, MAX_UUID_SIZE);
if (len1 == 4)
memcpy (nu1, p_uuid1, (size_t)len1);
else if (len1 == 2)
memcpy (nu1 + 2, p_uuid1, (size_t)len1);
return (memcmp (nu1, nu2, MAX_UUID_SIZE) == 0);
}
}
}
/*******************************************************************************
**
** Function sdpu_compare_bt_uuids
**
** Description This function compares 2 BT UUID structures.
**
** NOTE it is assumed that BT UUID structures are compressed to the
** smallest possible UUIDs (by removing the base SDP UUID)
**
** Returns TRUE if matched, else FALSE
**
*******************************************************************************/
BOOLEAN sdpu_compare_bt_uuids (tBT_UUID *p_uuid1, tBT_UUID *p_uuid2)
{
/* Lengths must match for BT UUIDs to match */
if (p_uuid1->len == p_uuid2->len)
{
if (p_uuid1->len == 2)
return (p_uuid1->uu.uuid16 == p_uuid2->uu.uuid16);
else if (p_uuid1->len == 4)
return (p_uuid1->uu.uuid32 == p_uuid2->uu.uuid32);
else if (!memcmp (p_uuid1->uu.uuid128, p_uuid2->uu.uuid128, 16))
return (TRUE);
}
return (FALSE);
}
/*******************************************************************************
**
** Function sdpu_compare_uuid_with_attr
**
** Description This function compares a BT UUID structure with the UUID in an
** SDP attribute record. If needed, they are expanded to 128-bit
** UUIDs, then compared.
**
** NOTE - it is assumed that BT UUID structures are compressed to the
** smallest possible UUIDs (by removing the base SDP UUID).
** - it is also assumed that the discovery atribute is compressed
** to the smallest possible
**
** Returns TRUE if matched, else FALSE
**
*******************************************************************************/
BOOLEAN sdpu_compare_uuid_with_attr (tBT_UUID *p_btuuid, tSDP_DISC_ATTR *p_attr)
{
UINT16 attr_len = SDP_DISC_ATTR_LEN (p_attr->attr_len_type);
/* Since both UUIDs are compressed, lengths must match */
if (p_btuuid->len != attr_len)
return (FALSE);
if (p_btuuid->len == 2)
return (BOOLEAN)(p_btuuid->uu.uuid16 == p_attr->attr_value.v.u16);
else if (p_btuuid->len == 4)
return (BOOLEAN)(p_btuuid->uu.uuid32 == p_attr->attr_value.v.u32);
/* coverity[overrun-buffer-arg] */
/*
Event overrun-buffer-arg: Overrun of static array "&p_attr->attr_value.v.array" of size 4 bytes by passing it to a function which indexes it with argument "16U" at byte position 15
FALSE-POSITIVE error from Coverity test tool. Please do NOT remove following comment.
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
*/
else if (!memcmp (p_btuuid->uu.uuid128,(void*) p_attr->attr_value.v.array, MAX_UUID_SIZE))
return (TRUE);
return (FALSE);
}
/*******************************************************************************
**
** Function sdpu_sort_attr_list
**
** Description sorts a list of attributes in numeric order from lowest to
** highest to conform to SDP specification
**
** Returns void
**
*******************************************************************************/
void sdpu_sort_attr_list( UINT16 num_attr, tSDP_DISCOVERY_DB *p_db )
{
UINT16 i;
UINT16 x;
/* Done if no attributes to sort */
if (num_attr <= 1)
{
return;
}
else if (num_attr > SDP_MAX_ATTR_FILTERS)
{
num_attr = SDP_MAX_ATTR_FILTERS;
}
num_attr--; /* for the for-loop */
for( i = 0; i < num_attr; )
{
if( p_db->attr_filters[i] > p_db->attr_filters[i+1] )
{
/* swap the attribute IDs and start from the beginning */
x = p_db->attr_filters[i];
p_db->attr_filters[i] = p_db->attr_filters[i+1];
p_db->attr_filters[i+1] = x;
i = 0;
}
else
i++;
}
}
/*******************************************************************************
**
** Function sdpu_get_list_len
**
** Description gets the total list length in the sdp database for a given
** uid sequence and attr sequence
**
** Returns void
**
*******************************************************************************/
UINT16 sdpu_get_list_len(tSDP_UUID_SEQ *uid_seq, tSDP_ATTR_SEQ *attr_seq)
{
tSDP_RECORD *p_rec;
UINT16 len = 0;
UINT16 len1;
for (p_rec = sdp_db_service_search (NULL, uid_seq); p_rec; p_rec = sdp_db_service_search (p_rec, uid_seq))
{
len += 3;
len1 = sdpu_get_attrib_seq_len(p_rec, attr_seq );
if (len1 != 0)
len += len1;
else
len -= 3;
}
return len;
}
/*******************************************************************************
**
** Function sdpu_get_attrib_seq_len
**
** Description gets the length of the specific attributes in a given
** sdp record
**
** Returns void
**
*******************************************************************************/
UINT16 sdpu_get_attrib_seq_len(tSDP_RECORD *p_rec, tSDP_ATTR_SEQ *attr_seq)
{
tSDP_ATTRIBUTE *p_attr;
UINT16 len1 = 0;
UINT16 xx;
BOOLEAN is_range = FALSE;
UINT16 start_id=0, end_id=0;
for (xx = 0; xx < attr_seq->num_attr; xx++)
{
if (is_range == FALSE)
{
start_id = attr_seq->attr_entry[xx].start;
end_id = attr_seq->attr_entry[xx].end;
}
p_attr = sdp_db_find_attr_in_rec (p_rec,
start_id,
end_id);
if (p_attr)
{
len1 += sdpu_get_attrib_entry_len (p_attr);
/* If doing a range, stick with this one till no more attributes found */
if (start_id != end_id)
{
/* Update for next time through */
start_id = p_attr->id + 1;
xx--;
is_range = TRUE;
}
else
is_range = FALSE;
}
else
is_range = FALSE;
}
return len1;
}
/*******************************************************************************
**
** Function sdpu_get_attrib_entry_len
**
** Description gets the length of a specific attribute
**
** Returns void
**
*******************************************************************************/
UINT16 sdpu_get_attrib_entry_len(tSDP_ATTRIBUTE *p_attr)
{
UINT16 len = 3;
/* the attribute is in the db record.
* assuming the attribute len is less than SDP_MAX_ATTR_LEN */
switch(p_attr->type)
{
case TEXT_STR_DESC_TYPE: /* 4 */
case DATA_ELE_SEQ_DESC_TYPE:/* 6 */
case DATA_ELE_ALT_DESC_TYPE:/* 7 */
case URL_DESC_TYPE: /* 8 */
#if (SDP_MAX_ATTR_LEN > 0xFFFF)
if(p_attr->len > 0xFFFF)
{
len += 5;
}
else
#endif/* 0xFFFF - 0xFF */
#if (SDP_MAX_ATTR_LEN > 0xFF)
if(p_attr->len > 0xFF)
{
len += 3;
}
else
#endif /* 0xFF and less*/
{
len += 2;
}
len += p_attr->len;
return len;
}
/* Now, the attribute value */
switch (p_attr->len)
{
case 1:
case 2:
case 4:
case 8:
case 16:
len += 1;
break;
default:
len += 2;
break;
}
len += p_attr->len;
return len;
}
/*******************************************************************************
**
** Function sdpu_build_partial_attrib_entry
**
** Description This function fills a buffer with partial attribute. It is
** assumed that the maximum size of any attribute is 256 bytes.
**
** p_out: output buffer
** p_attr: attribute to be copied partially into p_out
** rem_len: num bytes to copy into p_out
** offset: current start offset within the attr that needs to be copied
**
** Returns Pointer to next byte in the output buffer.
** offset is also updated
**
*******************************************************************************/
UINT8 *sdpu_build_partial_attrib_entry (UINT8 *p_out, tSDP_ATTRIBUTE *p_attr, UINT16 len, UINT16 *offset)
{
UINT8 *p_attr_buff;
UINT8 *p_tmp_attr;
size_t len_to_copy;
UINT16 attr_len;
if ((p_attr_buff = (UINT8 *) GKI_getbuf(sizeof(UINT8) * SDP_MAX_ATTR_LEN )) == NULL)
{
SDP_TRACE_ERROR("sdpu_build_partial_attrib_entry cannot get a buffer!\n");
return NULL;
}
p_tmp_attr = p_attr_buff;
sdpu_build_attrib_entry(p_tmp_attr, p_attr);
attr_len = sdpu_get_attrib_entry_len(p_attr);
len_to_copy = ((attr_len - *offset) < len) ? (attr_len - *offset): len;
memcpy(p_out, &p_attr_buff[*offset], len_to_copy);
p_out = &p_out[len_to_copy];
*offset += len_to_copy;
GKI_freebuf(p_attr_buff);
return p_out;
}
/*******************************************************************************
**
** Function sdpu_uuid16_to_uuid128
**
** Description This function converts UUID-16 to UUID-128 by including the base UUID
**
** uuid16: 2-byte UUID
** p_uuid128: Expanded 128-bit UUID
**
** Returns None
**
*******************************************************************************/
void sdpu_uuid16_to_uuid128(UINT16 uuid16, UINT8* p_uuid128)
{
UINT16 uuid16_bo;
memset(p_uuid128, 0, 16);
memcpy(p_uuid128, sdp_base_uuid, MAX_UUID_SIZE);
uuid16_bo = ntohs(uuid16);
memcpy(p_uuid128+ 2, &uuid16_bo, sizeof(uint16_t));
}
Reference in New Issue View Git Blame Copy Permalink