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bluez/lib/sdp.c
Bastien Nocera 0b52ecca60 sdp: Fix mismatched int casting
2024-07-08 10:19:20 -04:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2001-2002 Nokia Corporation
* Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
* Copyright (C) 2002-2010 Marcel Holtmann <marcel@holtmann.org>
* Copyright (C) 2002-2003 Stephen Crane <steve.crane@rococosoft.com>
*
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <syslog.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include "bluetooth.h"
#include "hci.h"
#include "hci_lib.h"
#include "l2cap.h"
#include "sdp.h"
#include "sdp_lib.h"
#define SDPINF(fmt, arg...) syslog(LOG_INFO, fmt "\n", ## arg)
#define SDPERR(fmt, arg...) syslog(LOG_ERR, "%s: " fmt "\n", __func__ , ## arg)
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#ifdef SDP_DEBUG
#define SDPDBG(fmt, arg...) syslog(LOG_DEBUG, "%s: " fmt "\n", __func__ , ## arg)
#else
#define SDPDBG(fmt...)
#endif
static const uint128_t bluetooth_base_uuid = {
.data = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
0x80, 0x00, 0x00, 0x80, 0x5F, 0x9B, 0x34, 0xFB }
};
#define SDP_MAX_ATTR_LEN 65535
/* match MTU used by RFCOMM */
#define SDP_LARGE_L2CAP_MTU 1013
static sdp_data_t *sdp_copy_seq(sdp_data_t *data);
static int sdp_attr_add_new_with_length(sdp_record_t *rec,
uint16_t attr, uint8_t dtd, const void *value, uint32_t len);
static int sdp_gen_buffer(sdp_buf_t *buf, sdp_data_t *d);
/* Message structure. */
struct tupla {
int index;
const char *str;
};
static const struct tupla Protocol[] = {
{ SDP_UUID, "SDP" },
{ UDP_UUID, "UDP" },
{ RFCOMM_UUID, "RFCOMM" },
{ TCP_UUID, "TCP" },
{ TCS_BIN_UUID, "TCS-BIN" },
{ TCS_AT_UUID, "TCS-AT" },
{ OBEX_UUID, "OBEX" },
{ IP_UUID, "IP" },
{ FTP_UUID, "FTP" },
{ HTTP_UUID, "HTTP" },
{ WSP_UUID, "WSP" },
{ BNEP_UUID, "BNEP" },
{ UPNP_UUID, "UPNP" },
{ HIDP_UUID, "HIDP" },
{ HCRP_CTRL_UUID, "HCRP-Ctrl" },
{ HCRP_DATA_UUID, "HCRP-Data" },
{ HCRP_NOTE_UUID, "HCRP-Notify" },
{ AVCTP_UUID, "AVCTP" },
{ AVDTP_UUID, "AVDTP" },
{ CMTP_UUID, "CMTP" },
{ UDI_UUID, "UDI" },
{ MCAP_CTRL_UUID, "MCAP-Ctrl" },
{ MCAP_DATA_UUID, "MCAP-Data" },
{ L2CAP_UUID, "L2CAP" },
{ ATT_UUID, "ATT" },
{ 0 }
};
static const struct tupla ServiceClass[] = {
{ SDP_SERVER_SVCLASS_ID, "SDP Server" },
{ BROWSE_GRP_DESC_SVCLASS_ID, "Browse Group Descriptor" },
{ PUBLIC_BROWSE_GROUP, "Public Browse Group" },
{ SERIAL_PORT_SVCLASS_ID, "Serial Port" },
{ LAN_ACCESS_SVCLASS_ID, "LAN Access Using PPP" },
{ DIALUP_NET_SVCLASS_ID, "Dialup Networking" },
{ IRMC_SYNC_SVCLASS_ID, "IrMC Sync" },
{ OBEX_OBJPUSH_SVCLASS_ID, "OBEX Object Push" },
{ OBEX_FILETRANS_SVCLASS_ID, "OBEX File Transfer" },
{ IRMC_SYNC_CMD_SVCLASS_ID, "IrMC Sync Command" },
{ HEADSET_SVCLASS_ID, "Headset" },
{ CORDLESS_TELEPHONY_SVCLASS_ID, "Cordless Telephony" },
{ AUDIO_SOURCE_SVCLASS_ID, "Audio Source" },
{ AUDIO_SINK_SVCLASS_ID, "Audio Sink" },
{ AV_REMOTE_TARGET_SVCLASS_ID, "AV Remote Target" },
{ ADVANCED_AUDIO_SVCLASS_ID, "Advanced Audio" },
{ AV_REMOTE_SVCLASS_ID, "AV Remote" },
{ AV_REMOTE_CONTROLLER_SVCLASS_ID, "AV Remote Controller" },
{ INTERCOM_SVCLASS_ID, "Intercom" },
{ FAX_SVCLASS_ID, "Fax" },
{ HEADSET_AGW_SVCLASS_ID, "Headset Audio Gateway" },
{ WAP_SVCLASS_ID, "WAP" },
{ WAP_CLIENT_SVCLASS_ID, "WAP Client" },
{ PANU_SVCLASS_ID, "PAN User" },
{ NAP_SVCLASS_ID, "Network Access Point" },
{ GN_SVCLASS_ID, "PAN Group Network" },
{ DIRECT_PRINTING_SVCLASS_ID, "Direct Printing" },
{ REFERENCE_PRINTING_SVCLASS_ID, "Reference Printing" },
{ IMAGING_SVCLASS_ID, "Imaging" },
{ IMAGING_RESPONDER_SVCLASS_ID, "Imaging Responder" },
{ IMAGING_ARCHIVE_SVCLASS_ID, "Imaging Automatic Archive" },
{ IMAGING_REFOBJS_SVCLASS_ID, "Imaging Referenced Objects" },
{ HANDSFREE_SVCLASS_ID, "Handsfree" },
{ HANDSFREE_AGW_SVCLASS_ID, "Handsfree Audio Gateway" },
{ DIRECT_PRT_REFOBJS_SVCLASS_ID, "Direct Printing Ref. Objects" },
{ REFLECTED_UI_SVCLASS_ID, "Reflected UI" },
{ BASIC_PRINTING_SVCLASS_ID, "Basic Printing" },
{ PRINTING_STATUS_SVCLASS_ID, "Printing Status" },
{ HID_SVCLASS_ID, "Human Interface Device" },
{ HCR_SVCLASS_ID, "Hardcopy Cable Replacement" },
{ HCR_PRINT_SVCLASS_ID, "HCR Print" },
{ HCR_SCAN_SVCLASS_ID, "HCR Scan" },
{ CIP_SVCLASS_ID, "Common ISDN Access" },
{ VIDEO_CONF_GW_SVCLASS_ID, "Video Conferencing Gateway" },
{ UDI_MT_SVCLASS_ID, "UDI MT" },
{ UDI_TA_SVCLASS_ID, "UDI TA" },
{ AV_SVCLASS_ID, "Audio/Video" },
{ SAP_SVCLASS_ID, "SIM Access" },
{ PBAP_PCE_SVCLASS_ID, "Phonebook Access - PCE" },
{ PBAP_PSE_SVCLASS_ID, "Phonebook Access - PSE" },
{ PBAP_SVCLASS_ID, "Phonebook Access" },
{ MAP_MSE_SVCLASS_ID, "Message Access - MAS" },
{ MAP_MCE_SVCLASS_ID, "Message Access - MNS" },
{ MAP_SVCLASS_ID, "Message Access" },
{ PNP_INFO_SVCLASS_ID, "PnP Information" },
{ GENERIC_NETWORKING_SVCLASS_ID, "Generic Networking" },
{ GENERIC_FILETRANS_SVCLASS_ID, "Generic File Transfer" },
{ GENERIC_AUDIO_SVCLASS_ID, "Generic Audio" },
{ GENERIC_TELEPHONY_SVCLASS_ID, "Generic Telephony" },
{ UPNP_SVCLASS_ID, "UPnP" },
{ UPNP_IP_SVCLASS_ID, "UPnP IP" },
{ UPNP_PAN_SVCLASS_ID, "UPnP PAN" },
{ UPNP_LAP_SVCLASS_ID, "UPnP LAP" },
{ UPNP_L2CAP_SVCLASS_ID, "UPnP L2CAP" },
{ VIDEO_SOURCE_SVCLASS_ID, "Video Source" },
{ VIDEO_SINK_SVCLASS_ID, "Video Sink" },
{ VIDEO_DISTRIBUTION_SVCLASS_ID, "Video Distribution" },
{ HDP_SVCLASS_ID, "HDP" },
{ HDP_SOURCE_SVCLASS_ID, "HDP Source" },
{ HDP_SINK_SVCLASS_ID, "HDP Sink" },
{ GENERIC_ACCESS_SVCLASS_ID, "Generic Access" },
{ GENERIC_ATTRIB_SVCLASS_ID, "Generic Attribute" },
{ APPLE_AGENT_SVCLASS_ID, "Apple Agent" },
{ 0 }
};
#define Profile ServiceClass
static const char *string_lookup(const struct tupla *pt0, int index)
{
const struct tupla *pt;
for (pt = pt0; pt->index; pt++)
if (pt->index == index)
return pt->str;
return "";
}
static const char *string_lookup_uuid(const struct tupla *pt0,
const uuid_t *uuid)
{
uuid_t tmp_uuid;
memcpy(&tmp_uuid, uuid, sizeof(tmp_uuid));
if (sdp_uuid128_to_uuid(&tmp_uuid)) {
switch (tmp_uuid.type) {
case SDP_UUID16:
return string_lookup(pt0, tmp_uuid.value.uuid16);
case SDP_UUID32:
return string_lookup(pt0, tmp_uuid.value.uuid32);
}
}
return "";
}
/*
* Prints into a string the Protocol UUID
* coping a maximum of n characters.
*/
static int uuid2str(const struct tupla *message, const uuid_t *uuid, char *str,
size_t n)
{
const char *str2;
if (!uuid) {
snprintf(str, n, "NULL");
return -2;
}
switch (uuid->type) {
case SDP_UUID16:
str2 = string_lookup(message, uuid->value.uuid16);
snprintf(str, n, "%s", str2);
break;
case SDP_UUID32:
str2 = string_lookup(message, uuid->value.uuid32);
snprintf(str, n, "%s", str2);
break;
case SDP_UUID128:
str2 = string_lookup_uuid(message, uuid);
snprintf(str, n, "%s", str2);
break;
default:
snprintf(str, n, "Type of UUID (%x) unknown.", uuid->type);
return -1;
}
return 0;
}
int sdp_proto_uuid2strn(const uuid_t *uuid, char *str, size_t n)
{
return uuid2str(Protocol, uuid, str, n);
}
int sdp_svclass_uuid2strn(const uuid_t *uuid, char *str, size_t n)
{
return uuid2str(ServiceClass, uuid, str, n);
}
int sdp_profile_uuid2strn(const uuid_t *uuid, char *str, size_t n)
{
return uuid2str(Profile, uuid, str, n);
}
/*
* convert the UUID to string, copying a maximum of n characters.
*/
int sdp_uuid2strn(const uuid_t *uuid, char *str, size_t n)
{
if (!uuid) {
snprintf(str, n, "NULL");
return -2;
}
switch (uuid->type) {
case SDP_UUID16:
snprintf(str, n, "%.4x", uuid->value.uuid16);
break;
case SDP_UUID32:
snprintf(str, n, "%.8x", uuid->value.uuid32);
break;
case SDP_UUID128:{
unsigned int data0;
unsigned short data1;
unsigned short data2;
unsigned short data3;
unsigned int data4;
unsigned short data5;
memcpy(&data0, &uuid->value.uuid128.data[0], 4);
memcpy(&data1, &uuid->value.uuid128.data[4], 2);
memcpy(&data2, &uuid->value.uuid128.data[6], 2);
memcpy(&data3, &uuid->value.uuid128.data[8], 2);
memcpy(&data4, &uuid->value.uuid128.data[10], 4);
memcpy(&data5, &uuid->value.uuid128.data[14], 2);
snprintf(str, n, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x",
ntohl(data0), ntohs(data1),
ntohs(data2), ntohs(data3),
ntohl(data4), ntohs(data5));
}
break;
default:
snprintf(str, n, "Type of UUID (%x) unknown.", uuid->type);
return -1; /* Enum type of UUID not set */
}
return 0;
}
#ifdef SDP_DEBUG
/*
* Function prints the UUID in hex as per defined syntax -
*
* 4bytes-2bytes-2bytes-2bytes-6bytes
*
* There is some ugly code, including hardcoding, but
* that is just the way it is converting 16 and 32 bit
* UUIDs to 128 bit as defined in the SDP doc
*/
void sdp_uuid_print(const uuid_t *uuid)
{
if (uuid == NULL) {
SDPERR("Null passed to print UUID");
return;
}
if (uuid->type == SDP_UUID16) {
SDPDBG(" uint16_t : 0x%.4x", uuid->value.uuid16);
} else if (uuid->type == SDP_UUID32) {
SDPDBG(" uint32_t : 0x%.8x", uuid->value.uuid32);
} else if (uuid->type == SDP_UUID128) {
unsigned int data0;
unsigned short data1;
unsigned short data2;
unsigned short data3;
unsigned int data4;
unsigned short data5;
memcpy(&data0, &uuid->value.uuid128.data[0], 4);
memcpy(&data1, &uuid->value.uuid128.data[4], 2);
memcpy(&data2, &uuid->value.uuid128.data[6], 2);
memcpy(&data3, &uuid->value.uuid128.data[8], 2);
memcpy(&data4, &uuid->value.uuid128.data[10], 4);
memcpy(&data5, &uuid->value.uuid128.data[14], 2);
SDPDBG(" uint128_t : 0x%.8x-%.4x-%.4x-%.4x-%.8x%.4x",
ntohl(data0), ntohs(data1), ntohs(data2),
ntohs(data3), ntohl(data4), ntohs(data5));
} else
SDPERR("Enum type of UUID not set");
}
#endif
sdp_data_t *sdp_data_alloc_with_length(uint8_t dtd, const void *value,
uint32_t length)
{
sdp_data_t *seq;
sdp_data_t *d = bt_malloc0(sizeof(sdp_data_t));
if (!d)
return NULL;
d->dtd = dtd;
d->unitSize = sizeof(uint8_t);
switch (dtd) {
case SDP_DATA_NIL:
break;
case SDP_UINT8:
d->val.uint8 = *(uint8_t *) value;
d->unitSize += sizeof(uint8_t);
break;
case SDP_INT8:
case SDP_BOOL:
d->val.int8 = *(int8_t *) value;
d->unitSize += sizeof(int8_t);
break;
case SDP_UINT16:
d->val.uint16 = bt_get_unaligned((uint16_t *) value);
d->unitSize += sizeof(uint16_t);
break;
case SDP_INT16:
d->val.int16 = bt_get_unaligned((int16_t *) value);
d->unitSize += sizeof(int16_t);
break;
case SDP_UINT32:
d->val.uint32 = bt_get_unaligned((uint32_t *) value);
d->unitSize += sizeof(uint32_t);
break;
case SDP_INT32:
d->val.int32 = bt_get_unaligned((int32_t *) value);
d->unitSize += sizeof(int32_t);
break;
case SDP_INT64:
d->val.int64 = bt_get_unaligned((int64_t *) value);
d->unitSize += sizeof(int64_t);
break;
case SDP_UINT64:
d->val.uint64 = bt_get_unaligned((uint64_t *) value);
d->unitSize += sizeof(uint64_t);
break;
case SDP_UINT128:
memcpy(&d->val.uint128.data, value, sizeof(uint128_t));
d->unitSize += sizeof(uint128_t);
break;
case SDP_INT128:
memcpy(&d->val.int128.data, value, sizeof(uint128_t));
d->unitSize += sizeof(uint128_t);
break;
case SDP_UUID16:
sdp_uuid16_create(&d->val.uuid, bt_get_unaligned((uint16_t *) value));
d->unitSize += sizeof(uint16_t);
break;
case SDP_UUID32:
sdp_uuid32_create(&d->val.uuid, bt_get_unaligned((uint32_t *) value));
d->unitSize += sizeof(uint32_t);
break;
case SDP_UUID128:
sdp_uuid128_create(&d->val.uuid, value);
d->unitSize += sizeof(uint128_t);
break;
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
if (!value) {
free(d);
return NULL;
}
d->unitSize += length;
if (length <= USHRT_MAX) {
d->val.str = bt_malloc0(length + 1);
if (!d->val.str) {
free(d);
return NULL;
}
memcpy(d->val.str, value, length);
} else {
SDPERR("Strings of size > USHRT_MAX not supported");
free(d);
d = NULL;
}
break;
case SDP_URL_STR32:
case SDP_TEXT_STR32:
SDPERR("Strings of size > USHRT_MAX not supported");
break;
case SDP_ALT8:
case SDP_ALT16:
case SDP_ALT32:
case SDP_SEQ8:
case SDP_SEQ16:
case SDP_SEQ32:
if (dtd == SDP_ALT8 || dtd == SDP_SEQ8)
d->unitSize += sizeof(uint8_t);
else if (dtd == SDP_ALT16 || dtd == SDP_SEQ16)
d->unitSize += sizeof(uint16_t);
else if (dtd == SDP_ALT32 || dtd == SDP_SEQ32)
d->unitSize += sizeof(uint32_t);
seq = (sdp_data_t *)value;
d->val.dataseq = seq;
for (; seq; seq = seq->next)
d->unitSize += seq->unitSize;
break;
default:
free(d);
d = NULL;
}
return d;
}
sdp_data_t *sdp_data_alloc(uint8_t dtd, const void *value)
{
uint32_t length;
switch (dtd) {
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
if (!value)
return NULL;
length = strlen((char *) value);
break;
default:
length = 0;
break;
}
return sdp_data_alloc_with_length(dtd, value, length);
}
sdp_data_t *sdp_seq_append(sdp_data_t *seq, sdp_data_t *d)
{
if (seq) {
sdp_data_t *p;
for (p = seq; p->next; p = p->next);
p->next = d;
} else
seq = d;
d->next = NULL;
return seq;
}
sdp_data_t *sdp_seq_alloc_with_length(void **dtds, void **values, int *length,
int len)
{
sdp_data_t *curr = NULL, *seq = NULL;
int i;
for (i = 0; i < len; i++) {
sdp_data_t *data;
uint8_t dtd = *(uint8_t *) dtds[i];
if (dtd >= SDP_SEQ8 && dtd <= SDP_ALT32)
data = (sdp_data_t *) values[i];
else
data = sdp_data_alloc_with_length(dtd, values[i], length[i]);
if (!data) {
sdp_data_free(seq);
return NULL;
}
if (curr)
curr->next = data;
else
seq = data;
curr = data;
}
return sdp_data_alloc(SDP_SEQ8, seq);
}
sdp_data_t *sdp_seq_alloc(void **dtds, void **values, int len)
{
sdp_data_t *curr = NULL, *seq = NULL;
int i;
for (i = 0; i < len; i++) {
sdp_data_t *data;
uint8_t dtd = *(uint8_t *) dtds[i];
if (dtd >= SDP_SEQ8 && dtd <= SDP_ALT32)
data = (sdp_data_t *) values[i];
else
data = sdp_data_alloc(dtd, values[i]);
if (!data) {
sdp_data_free(seq);
return NULL;
}
if (curr)
curr->next = data;
else
seq = data;
curr = data;
}
return sdp_data_alloc(SDP_SEQ8, seq);
}
static void extract_svclass_uuid(sdp_data_t *data, uuid_t *uuid)
{
sdp_data_t *d;
if (!data || !SDP_IS_SEQ(data->dtd))
return;
d = data->val.dataseq;
if (!d)
return;
if (d->dtd < SDP_UUID16 || d->dtd > SDP_UUID128)
return;
*uuid = d->val.uuid;
}
int sdp_attr_add(sdp_record_t *rec, uint16_t attr, sdp_data_t *d)
{
sdp_data_t *p = sdp_data_get(rec, attr);
if (p)
return -1;
if (!d)
return -1;
d->attrId = attr;
rec->attrlist = sdp_list_insert_sorted(rec->attrlist, d, sdp_attrid_comp_func);
if (attr == SDP_ATTR_SVCLASS_ID_LIST)
extract_svclass_uuid(d, &rec->svclass);
return 0;
}
void sdp_attr_remove(sdp_record_t *rec, uint16_t attr)
{
sdp_data_t *d = sdp_data_get(rec, attr);
if (d)
rec->attrlist = sdp_list_remove(rec->attrlist, d);
if (attr == SDP_ATTR_SVCLASS_ID_LIST)
memset(&rec->svclass, 0, sizeof(rec->svclass));
}
void sdp_set_seq_len(uint8_t *ptr, uint32_t length)
{
uint8_t dtd = *ptr++;
switch (dtd) {
case SDP_SEQ8:
case SDP_ALT8:
case SDP_TEXT_STR8:
case SDP_URL_STR8:
*ptr = (uint8_t) length;
break;
case SDP_SEQ16:
case SDP_ALT16:
case SDP_TEXT_STR16:
case SDP_URL_STR16:
bt_put_be16(length, ptr);
break;
case SDP_SEQ32:
case SDP_ALT32:
case SDP_TEXT_STR32:
case SDP_URL_STR32:
bt_put_be32(length, ptr);
break;
}
}
static int sdp_get_data_type_size(uint8_t dtd)
{
int size = sizeof(uint8_t);
switch (dtd) {
case SDP_SEQ8:
case SDP_TEXT_STR8:
case SDP_URL_STR8:
case SDP_ALT8:
size += sizeof(uint8_t);
break;
case SDP_SEQ16:
case SDP_TEXT_STR16:
case SDP_URL_STR16:
case SDP_ALT16:
size += sizeof(uint16_t);
break;
case SDP_SEQ32:
case SDP_TEXT_STR32:
case SDP_URL_STR32:
case SDP_ALT32:
size += sizeof(uint32_t);
break;
}
return size;
}
void sdp_set_attrid(sdp_buf_t *buf, uint16_t attr)
{
uint8_t *p = buf->data;
/* data type for attr */
*p++ = SDP_UINT16;
buf->data_size = sizeof(uint8_t);
bt_put_be16(attr, p);
buf->data_size += sizeof(uint16_t);
}
static int get_data_size(sdp_buf_t *buf, sdp_data_t *sdpdata)
{
sdp_data_t *d;
int n = 0;
for (d = sdpdata->val.dataseq; d; d = d->next) {
if (buf->data)
n += sdp_gen_pdu(buf, d);
else
n += sdp_gen_buffer(buf, d);
}
return n;
}
static int sdp_get_data_size(sdp_buf_t *buf, sdp_data_t *d)
{
uint32_t data_size = 0;
uint8_t dtd = d->dtd;
switch (dtd) {
case SDP_DATA_NIL:
break;
case SDP_UINT8:
data_size = sizeof(uint8_t);
break;
case SDP_UINT16:
data_size = sizeof(uint16_t);
break;
case SDP_UINT32:
data_size = sizeof(uint32_t);
break;
case SDP_UINT64:
data_size = sizeof(uint64_t);
break;
case SDP_UINT128:
data_size = sizeof(uint128_t);
break;
case SDP_INT8:
case SDP_BOOL:
data_size = sizeof(int8_t);
break;
case SDP_INT16:
data_size = sizeof(int16_t);
break;
case SDP_INT32:
data_size = sizeof(int32_t);
break;
case SDP_INT64:
data_size = sizeof(int64_t);
break;
case SDP_INT128:
data_size = sizeof(uint128_t);
break;
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
case SDP_TEXT_STR32:
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_URL_STR32:
data_size = d->unitSize - sizeof(uint8_t);
break;
case SDP_SEQ8:
case SDP_SEQ16:
case SDP_SEQ32:
data_size = get_data_size(buf, d);
break;
case SDP_ALT8:
case SDP_ALT16:
case SDP_ALT32:
data_size = get_data_size(buf, d);
break;
case SDP_UUID16:
data_size = sizeof(uint16_t);
break;
case SDP_UUID32:
data_size = sizeof(uint32_t);
break;
case SDP_UUID128:
data_size = sizeof(uint128_t);
break;
default:
break;
}
return data_size;
}
static int sdp_gen_buffer(sdp_buf_t *buf, sdp_data_t *d)
{
int orig = buf->buf_size;
if (buf->buf_size == 0 && d->dtd == 0) {
/* create initial sequence */
buf->buf_size += sizeof(uint8_t);
/* reserve space for sequence size */
buf->buf_size += sizeof(uint8_t);
}
/* attribute length */
buf->buf_size += sizeof(uint8_t) + sizeof(uint16_t);
buf->buf_size += sdp_get_data_type_size(d->dtd);
buf->buf_size += sdp_get_data_size(buf, d);
if (buf->buf_size > UCHAR_MAX && d->dtd == SDP_SEQ8)
buf->buf_size += sizeof(uint8_t);
return buf->buf_size - orig;
}
int sdp_gen_pdu(sdp_buf_t *buf, sdp_data_t *d)
{
uint32_t pdu_size, data_size;
unsigned char *src = NULL, is_seq = 0, is_alt = 0;
uint16_t u16;
uint32_t u32;
uint64_t u64;
uint128_t u128;
uint8_t *seqp = buf->data + buf->data_size;
uint32_t orig_data_size = buf->data_size;
recalculate:
pdu_size = sdp_get_data_type_size(d->dtd);
buf->data_size += pdu_size;
data_size = sdp_get_data_size(buf, d);
if (data_size > UCHAR_MAX && d->dtd == SDP_SEQ8) {
buf->data_size = orig_data_size;
d->dtd = SDP_SEQ16;
goto recalculate;
}
*seqp = d->dtd;
switch (d->dtd) {
case SDP_DATA_NIL:
break;
case SDP_UINT8:
src = &d->val.uint8;
break;
case SDP_UINT16:
u16 = htons(d->val.uint16);
src = (unsigned char *) &u16;
break;
case SDP_UINT32:
u32 = htonl(d->val.uint32);
src = (unsigned char *) &u32;
break;
case SDP_UINT64:
u64 = hton64(d->val.uint64);
src = (unsigned char *) &u64;
break;
case SDP_UINT128:
hton128(&d->val.uint128, &u128);
src = (unsigned char *) &u128;
break;
case SDP_INT8:
case SDP_BOOL:
src = (unsigned char *) &d->val.int8;
break;
case SDP_INT16:
u16 = htons(d->val.int16);
src = (unsigned char *) &u16;
break;
case SDP_INT32:
u32 = htonl(d->val.int32);
src = (unsigned char *) &u32;
break;
case SDP_INT64:
u64 = hton64(d->val.int64);
src = (unsigned char *) &u64;
break;
case SDP_INT128:
hton128(&d->val.int128, &u128);
src = (unsigned char *) &u128;
break;
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
case SDP_TEXT_STR32:
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_URL_STR32:
src = (unsigned char *) d->val.str;
sdp_set_seq_len(seqp, data_size);
break;
case SDP_SEQ8:
case SDP_SEQ16:
case SDP_SEQ32:
is_seq = 1;
sdp_set_seq_len(seqp, data_size);
break;
case SDP_ALT8:
case SDP_ALT16:
case SDP_ALT32:
is_alt = 1;
sdp_set_seq_len(seqp, data_size);
break;
case SDP_UUID16:
u16 = htons(d->val.uuid.value.uuid16);
src = (unsigned char *) &u16;
break;
case SDP_UUID32:
u32 = htonl(d->val.uuid.value.uuid32);
src = (unsigned char *) &u32;
break;
case SDP_UUID128:
src = (unsigned char *) &d->val.uuid.value.uuid128;
break;
default:
break;
}
if (!is_seq && !is_alt) {
if (src && buf->buf_size >= buf->data_size + data_size) {
memcpy(buf->data + buf->data_size, src, data_size);
buf->data_size += data_size;
} else if (d->dtd != SDP_DATA_NIL) {
SDPDBG("Gen PDU : Can't copy from invalid source or dest");
}
}
pdu_size += data_size;
return pdu_size;
}
static void sdp_attr_pdu(void *value, void *udata)
{
sdp_append_to_pdu((sdp_buf_t *)udata, (sdp_data_t *)value);
}
static void sdp_attr_size(void *value, void *udata)
{
sdp_gen_buffer((sdp_buf_t *)udata, (sdp_data_t *)value);
}
int sdp_gen_record_pdu(const sdp_record_t *rec, sdp_buf_t *buf)
{
memset(buf, 0, sizeof(sdp_buf_t));
sdp_list_foreach(rec->attrlist, sdp_attr_size, buf);
buf->data = bt_malloc0(buf->buf_size);
if (!buf->data)
return -ENOMEM;
buf->data_size = 0;
sdp_list_foreach(rec->attrlist, sdp_attr_pdu, buf);
return 0;
}
void sdp_attr_replace(sdp_record_t *rec, uint16_t attr, sdp_data_t *d)
{
sdp_data_t *p;
if (!rec)
return;
p = sdp_data_get(rec, attr);
if (p) {
rec->attrlist = sdp_list_remove(rec->attrlist, p);
sdp_data_free(p);
}
d->attrId = attr;
rec->attrlist = sdp_list_insert_sorted(rec->attrlist, d, sdp_attrid_comp_func);
if (attr == SDP_ATTR_SVCLASS_ID_LIST)
extract_svclass_uuid(d, &rec->svclass);
}
int sdp_attrid_comp_func(const void *key1, const void *key2)
{
const sdp_data_t *d1 = (const sdp_data_t *)key1;
const sdp_data_t *d2 = (const sdp_data_t *)key2;
if (d1 && d2)
return d1->attrId - d2->attrId;
return 0;
}
static void data_seq_free(sdp_data_t *seq)
{
sdp_data_t *d = seq->val.dataseq;
while (d) {
sdp_data_t *next = d->next;
sdp_data_free(d);
d = next;
}
}
void sdp_data_free(sdp_data_t *d)
{
if (!d)
return;
switch (d->dtd) {
case SDP_SEQ8:
case SDP_SEQ16:
case SDP_SEQ32:
data_seq_free(d);
break;
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_URL_STR32:
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
case SDP_TEXT_STR32:
free(d->val.str);
break;
}
free(d);
}
int sdp_uuid_extract(const uint8_t *p, int bufsize, uuid_t *uuid, int *scanned)
{
uint8_t type;
if (bufsize < (int) sizeof(uint8_t)) {
SDPERR("Unexpected end of packet");
return -1;
}
type = *(const uint8_t *) p;
if (!SDP_IS_UUID(type)) {
SDPERR("Unknown data type : %d expecting a svc UUID", type);
return -1;
}
p += sizeof(uint8_t);
*scanned += sizeof(uint8_t);
bufsize -= sizeof(uint8_t);
if (type == SDP_UUID16) {
if (bufsize < (int) sizeof(uint16_t)) {
SDPERR("Not enough room for 16-bit UUID");
return -1;
}
sdp_uuid16_create(uuid, bt_get_be16(p));
*scanned += sizeof(uint16_t);
} else if (type == SDP_UUID32) {
if (bufsize < (int) sizeof(uint32_t)) {
SDPERR("Not enough room for 32-bit UUID");
return -1;
}
sdp_uuid32_create(uuid, bt_get_be32(p));
*scanned += sizeof(uint32_t);
} else {
if (bufsize < (int) sizeof(uint128_t)) {
SDPERR("Not enough room for 128-bit UUID");
return -1;
}
sdp_uuid128_create(uuid, p);
*scanned += sizeof(uint128_t);
}
return 0;
}
static sdp_data_t *extract_int(const void *p, int bufsize, int *len)
{
sdp_data_t *d;
if (bufsize < (int) sizeof(uint8_t)) {
SDPERR("Unexpected end of packet");
return NULL;
}
d = bt_malloc0(sizeof(sdp_data_t));
if (!d)
return NULL;
SDPDBG("Extracting integer");
d->dtd = *(uint8_t *) p;
p += sizeof(uint8_t);
*len += sizeof(uint8_t);
bufsize -= sizeof(uint8_t);
switch (d->dtd) {
case SDP_DATA_NIL:
break;
case SDP_BOOL:
case SDP_INT8:
case SDP_UINT8:
if (bufsize < (int) sizeof(uint8_t)) {
SDPERR("Unexpected end of packet");
free(d);
return NULL;
}
*len += sizeof(uint8_t);
d->val.uint8 = *(uint8_t *) p;
break;
case SDP_INT16:
case SDP_UINT16:
if (bufsize < (int) sizeof(uint16_t)) {
SDPERR("Unexpected end of packet");
free(d);
return NULL;
}
*len += sizeof(uint16_t);
d->val.uint16 = bt_get_be16(p);
break;
case SDP_INT32:
case SDP_UINT32:
if (bufsize < (int) sizeof(uint32_t)) {
SDPERR("Unexpected end of packet");
free(d);
return NULL;
}
*len += sizeof(uint32_t);
d->val.uint32 = bt_get_be32(p);
break;
case SDP_INT64:
case SDP_UINT64:
if (bufsize < (int) sizeof(uint64_t)) {
SDPERR("Unexpected end of packet");
free(d);
return NULL;
}
*len += sizeof(uint64_t);
d->val.uint64 = bt_get_be64(p);
break;
case SDP_INT128:
case SDP_UINT128:
if (bufsize < (int) sizeof(uint128_t)) {
SDPERR("Unexpected end of packet");
free(d);
return NULL;
}
*len += sizeof(uint128_t);
ntoh128((uint128_t *) p, &d->val.uint128);
break;
default:
free(d);
d = NULL;
}
return d;
}
static sdp_data_t *extract_uuid(const uint8_t *p, int bufsize, int *len,
sdp_record_t *rec)
{
sdp_data_t *d = bt_malloc0(sizeof(sdp_data_t));
if (!d)
return NULL;
SDPDBG("Extracting UUID");
if (sdp_uuid_extract(p, bufsize, &d->val.uuid, len) < 0) {
free(d);
return NULL;
}
d->dtd = *p;
if (rec)
sdp_pattern_add_uuid(rec, &d->val.uuid);
return d;
}
/*
* Extract strings from the PDU (could be service description and similar info)
*/
static sdp_data_t *extract_str(const void *p, int bufsize, int *len)
{
char *s;
int n;
sdp_data_t *d;
if (bufsize < (int) sizeof(uint8_t)) {
SDPERR("Unexpected end of packet");
return NULL;
}
d = bt_malloc0(sizeof(sdp_data_t));
if (!d)
return NULL;
d->dtd = *(uint8_t *) p;
p += sizeof(uint8_t);
*len += sizeof(uint8_t);
bufsize -= sizeof(uint8_t);
switch (d->dtd) {
case SDP_TEXT_STR8:
case SDP_URL_STR8:
if (bufsize < (int) sizeof(uint8_t)) {
SDPERR("Unexpected end of packet");
free(d);
return NULL;
}
n = *(uint8_t *) p;
p += sizeof(uint8_t);
*len += sizeof(uint8_t);
bufsize -= sizeof(uint8_t);
break;
case SDP_TEXT_STR16:
case SDP_URL_STR16:
if (bufsize < (int) sizeof(uint16_t)) {
SDPERR("Unexpected end of packet");
free(d);
return NULL;
}
n = bt_get_be16(p);
p += sizeof(uint16_t);
*len += sizeof(uint16_t);
bufsize -= sizeof(uint16_t);
break;
default:
SDPERR("Sizeof text string > UINT16_MAX");
free(d);
return NULL;
}
if (bufsize < n) {
SDPERR("String too long to fit in packet");
free(d);
return NULL;
}
s = bt_malloc0(n + 1);
if (!s) {
SDPERR("Not enough memory for incoming string");
free(d);
return NULL;
}
memcpy(s, p, n);
*len += n;
SDPDBG("Len : %d", n);
SDPDBG("Str : %s", s);
d->val.str = s;
d->unitSize = n + sizeof(uint8_t);
return d;
}
/*
* Extract the sequence type and its length, and return offset into buf
* or 0 on failure.
*/
int sdp_extract_seqtype(const uint8_t *buf, int bufsize, uint8_t *dtdp, int *size)
{
uint8_t dtd;
int scanned = sizeof(uint8_t);
if (bufsize < (int) sizeof(uint8_t)) {
SDPERR("Unexpected end of packet");
return 0;
}
dtd = *(uint8_t *) buf;
buf += sizeof(uint8_t);
bufsize -= sizeof(uint8_t);
*dtdp = dtd;
switch (dtd) {
case SDP_SEQ8:
case SDP_ALT8:
if (bufsize < (int) sizeof(uint8_t)) {
SDPERR("Unexpected end of packet");
return 0;
}
*size = *(uint8_t *) buf;
scanned += sizeof(uint8_t);
break;
case SDP_SEQ16:
case SDP_ALT16:
if (bufsize < (int) sizeof(uint16_t)) {
SDPERR("Unexpected end of packet");
return 0;
}
*size = bt_get_be16(buf);
scanned += sizeof(uint16_t);
break;
case SDP_SEQ32:
case SDP_ALT32:
if (bufsize < (int) sizeof(uint32_t)) {
SDPERR("Unexpected end of packet");
return 0;
}
*size = bt_get_be32(buf);
scanned += sizeof(uint32_t);
break;
default:
SDPERR("Unknown sequence type, aborting");
return 0;
}
return scanned;
}
static sdp_data_t *extract_seq(const void *p, int bufsize, int *len,
sdp_record_t *rec)
{
int seqlen, n = 0;
sdp_data_t *curr, *prev;
sdp_data_t *d = bt_malloc0(sizeof(sdp_data_t));
if (!d)
return NULL;
SDPDBG("Extracting SEQ");
*len = sdp_extract_seqtype(p, bufsize, &d->dtd, &seqlen);
SDPDBG("Sequence Type : 0x%x length : 0x%x", d->dtd, seqlen);
if (*len == 0)
return d;
if (*len > bufsize) {
SDPERR("Packet not big enough to hold sequence.");
free(d);
return NULL;
}
p += *len;
bufsize -= *len;
prev = NULL;
while (n < seqlen) {
int attrlen = 0;
curr = sdp_extract_attr(p, bufsize, &attrlen, rec);
if (curr == NULL)
break;
if (prev)
prev->next = curr;
else
d->val.dataseq = curr;
prev = curr;
p += attrlen;
n += attrlen;
bufsize -= attrlen;
SDPDBG("Extracted: %d SequenceLength: %d", n, seqlen);
}
*len += n;
return d;
}
sdp_data_t *sdp_extract_attr(const uint8_t *p, int bufsize, int *size,
sdp_record_t *rec)
{
sdp_data_t *elem;
int n = 0;
uint8_t dtd;
if (bufsize < (int) sizeof(uint8_t)) {
SDPERR("Unexpected end of packet");
return NULL;
}
dtd = *(const uint8_t *)p;
SDPDBG("extract_attr: dtd=0x%x", dtd);
switch (dtd) {
case SDP_DATA_NIL:
case SDP_BOOL:
case SDP_UINT8:
case SDP_UINT16:
case SDP_UINT32:
case SDP_UINT64:
case SDP_UINT128:
case SDP_INT8:
case SDP_INT16:
case SDP_INT32:
case SDP_INT64:
case SDP_INT128:
elem = extract_int(p, bufsize, &n);
break;
case SDP_UUID16:
case SDP_UUID32:
case SDP_UUID128:
elem = extract_uuid(p, bufsize, &n, rec);
break;
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
case SDP_TEXT_STR32:
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_URL_STR32:
elem = extract_str(p, bufsize, &n);
break;
case SDP_SEQ8:
case SDP_SEQ16:
case SDP_SEQ32:
case SDP_ALT8:
case SDP_ALT16:
case SDP_ALT32:
elem = extract_seq(p, bufsize, &n, rec);
break;
default:
SDPERR("Unknown data descriptor : 0x%x terminating", dtd);
return NULL;
}
*size += n;
return elem;
}
#ifdef SDP_DEBUG
static void attr_print_func(void *value, void *userData)
{
sdp_data_t *d = (sdp_data_t *)value;
SDPDBG("=====================================");
SDPDBG("ATTRIBUTE IDENTIFIER : 0x%x", d->attrId);
SDPDBG("ATTRIBUTE VALUE PTR : %p", value);
if (d)
sdp_data_print(d);
else
SDPDBG("NULL value");
SDPDBG("=====================================");
}
void sdp_print_service_attr(sdp_list_t *svcAttrList)
{
SDPDBG("Printing service attr list %p", svcAttrList);
sdp_list_foreach(svcAttrList, attr_print_func, NULL);
SDPDBG("Printed service attr list %p", svcAttrList);
}
#endif
sdp_record_t *sdp_extract_pdu(const uint8_t *buf, int bufsize, int *scanned)
{
int extracted = 0, seqlen = 0;
uint8_t dtd;
uint16_t attr;
sdp_record_t *rec = sdp_record_alloc();
const uint8_t *p = buf;
*scanned = sdp_extract_seqtype(buf, bufsize, &dtd, &seqlen);
p += *scanned;
bufsize -= *scanned;
rec->attrlist = NULL;
while (extracted < seqlen && bufsize > 0) {
int n = sizeof(uint8_t), attrlen = 0;
sdp_data_t *data = NULL;
SDPDBG("Extract PDU, sequenceLength: %d localExtractedLength: %d",
seqlen, extracted);
if (bufsize < n + (int) sizeof(uint16_t)) {
SDPERR("Unexpected end of packet");
break;
}
dtd = *(uint8_t *) p;
attr = bt_get_be16(p + n);
n += sizeof(uint16_t);
SDPDBG("DTD of attrId : %d Attr id : 0x%x ", dtd, attr);
data = sdp_extract_attr(p + n, bufsize - n, &attrlen, rec);
SDPDBG("Attr id : 0x%x attrValueLength : %d", attr, attrlen);
n += attrlen;
if (data == NULL) {
SDPDBG("Terminating extraction of attributes");
break;
}
if (attr == SDP_ATTR_RECORD_HANDLE)
rec->handle = data->val.uint32;
if (attr == SDP_ATTR_SVCLASS_ID_LIST)
extract_svclass_uuid(data, &rec->svclass);
extracted += n;
p += n;
bufsize -= n;
sdp_attr_replace(rec, attr, data);
SDPDBG("Extract PDU, seqLength: %d localExtractedLength: %d",
seqlen, extracted);
}
#ifdef SDP_DEBUG
SDPDBG("Successful extracting of Svc Rec attributes");
sdp_print_service_attr(rec->attrlist);
#endif
*scanned += seqlen;
return rec;
}
static void sdp_copy_pattern(void *value, void *udata)
{
uuid_t *uuid = value;
sdp_record_t *rec = udata;
sdp_pattern_add_uuid(rec, uuid);
}
static void *sdp_data_value(sdp_data_t *data, uint32_t *len)
{
void *val = NULL;
switch (data->dtd) {
case SDP_DATA_NIL:
break;
case SDP_UINT8:
val = &data->val.uint8;
break;
case SDP_INT8:
case SDP_BOOL:
val = &data->val.int8;
break;
case SDP_UINT16:
val = &data->val.uint16;
break;
case SDP_INT16:
val = &data->val.int16;
break;
case SDP_UINT32:
val = &data->val.uint32;
break;
case SDP_INT32:
val = &data->val.int32;
break;
case SDP_INT64:
val = &data->val.int64;
break;
case SDP_UINT64:
val = &data->val.uint64;
break;
case SDP_UINT128:
val = &data->val.uint128;
break;
case SDP_INT128:
val = &data->val.int128;
break;
case SDP_UUID16:
val = &data->val.uuid.value.uuid16;
break;
case SDP_UUID32:
val = &data->val.uuid.value.uuid32;
break;
case SDP_UUID128:
val = &data->val.uuid.value.uuid128;
break;
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
case SDP_URL_STR32:
case SDP_TEXT_STR32:
val = data->val.str;
if (len)
*len = data->unitSize - sizeof(uint8_t);
break;
case SDP_ALT8:
case SDP_ALT16:
case SDP_ALT32:
case SDP_SEQ8:
case SDP_SEQ16:
case SDP_SEQ32:
val = sdp_copy_seq(data->val.dataseq);
break;
}
return val;
}
static sdp_data_t *sdp_copy_seq(sdp_data_t *data)
{
sdp_data_t *tmp, *seq = NULL, *cur = NULL;
for (tmp = data; tmp; tmp = tmp->next) {
sdp_data_t *datatmp;
void *value;
uint32_t len = 0;
value = sdp_data_value(tmp, &len);
datatmp = sdp_data_alloc_with_length(tmp->dtd, value, len);
if (!datatmp) {
sdp_data_free(seq);
return NULL;
}
if (cur)
cur->next = datatmp;
else
seq = datatmp;
cur = datatmp;
}
return seq;
}
static void sdp_copy_attrlist(void *value, void *udata)
{
sdp_data_t *data = value;
sdp_record_t *rec = udata;
void *val;
uint32_t len = 0;
val = sdp_data_value(data, &len);
if (!len)
sdp_attr_add_new(rec, data->attrId, data->dtd, val);
else
sdp_attr_add_new_with_length(rec, data->attrId,
data->dtd, val, len);
}
sdp_record_t *sdp_copy_record(sdp_record_t *rec)
{
sdp_record_t *cpy;
cpy = sdp_record_alloc();
cpy->handle = rec->handle;
sdp_list_foreach(rec->pattern, sdp_copy_pattern, cpy);
sdp_list_foreach(rec->attrlist, sdp_copy_attrlist, cpy);
cpy->svclass = rec->svclass;
return cpy;
}
#ifdef SDP_DEBUG
static void print_dataseq(sdp_data_t *p)
{
sdp_data_t *d;
for (d = p; d; d = d->next)
sdp_data_print(d);
}
#endif
void sdp_record_print(const sdp_record_t *rec)
{
sdp_data_t *d = sdp_data_get(rec, SDP_ATTR_SVCNAME_PRIMARY);
if (d && SDP_IS_TEXT_STR(d->dtd))
printf("Service Name: %.*s\n", d->unitSize, d->val.str);
d = sdp_data_get(rec, SDP_ATTR_SVCDESC_PRIMARY);
if (d && SDP_IS_TEXT_STR(d->dtd))
printf("Service Description: %.*s\n", d->unitSize, d->val.str);
d = sdp_data_get(rec, SDP_ATTR_PROVNAME_PRIMARY);
if (d && SDP_IS_TEXT_STR(d->dtd))
printf("Service Provider: %.*s\n", d->unitSize, d->val.str);
}
#ifdef SDP_DEBUG
void sdp_data_print(sdp_data_t *d)
{
switch (d->dtd) {
case SDP_DATA_NIL:
SDPDBG("NIL");
break;
case SDP_BOOL:
case SDP_UINT8:
case SDP_UINT16:
case SDP_UINT32:
case SDP_UINT64:
case SDP_UINT128:
case SDP_INT8:
case SDP_INT16:
case SDP_INT32:
case SDP_INT64:
case SDP_INT128:
SDPDBG("Integer : 0x%x", d->val.uint32);
break;
case SDP_UUID16:
case SDP_UUID32:
case SDP_UUID128:
SDPDBG("UUID");
sdp_uuid_print(&d->val.uuid);
break;
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
case SDP_TEXT_STR32:
SDPDBG("Text : %s", d->val.str);
break;
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_URL_STR32:
SDPDBG("URL : %s", d->val.str);
break;
case SDP_SEQ8:
case SDP_SEQ16:
case SDP_SEQ32:
print_dataseq(d->val.dataseq);
break;
case SDP_ALT8:
case SDP_ALT16:
case SDP_ALT32:
SDPDBG("Data Sequence Alternates");
print_dataseq(d->val.dataseq);
break;
}
}
#endif
sdp_data_t *sdp_data_get(const sdp_record_t *rec, uint16_t attrId)
{
if (rec && rec->attrlist) {
sdp_data_t sdpTemplate;
sdp_list_t *p;
sdpTemplate.attrId = attrId;
p = sdp_list_find(rec->attrlist, &sdpTemplate, sdp_attrid_comp_func);
if (p)
return p->data;
}
return NULL;
}
static int sdp_send_req(sdp_session_t *session, uint8_t *buf, uint32_t size)
{
uint32_t sent = 0;
while (sent < size) {
int n = send(session->sock, buf + sent, size - sent, 0);
if (n < 0)
return -1;
sent += n;
}
return 0;
}
static int sdp_read_rsp(sdp_session_t *session, uint8_t *buf, uint32_t size)
{
fd_set readFds;
struct timeval timeout = { SDP_RESPONSE_TIMEOUT, 0 };
FD_ZERO(&readFds);
FD_SET(session->sock, &readFds);
SDPDBG("Waiting for response");
if (select(session->sock + 1, &readFds, NULL, NULL, &timeout) == 0) {
SDPERR("Client timed out");
errno = ETIMEDOUT;
return -1;
}
return recv(session->sock, buf, size, 0);
}
/*
* generic send request, wait for response method.
*/
int sdp_send_req_w4_rsp(sdp_session_t *session, uint8_t *reqbuf,
uint8_t *rspbuf, uint32_t reqsize, uint32_t *rspsize)
{
int n;
sdp_pdu_hdr_t *reqhdr = (sdp_pdu_hdr_t *) reqbuf;
sdp_pdu_hdr_t *rsphdr = (sdp_pdu_hdr_t *) rspbuf;
SDPDBG("");
if (0 > sdp_send_req(session, reqbuf, reqsize)) {
SDPERR("Error sending data:%m");
return -1;
}
n = sdp_read_rsp(session, rspbuf, SDP_RSP_BUFFER_SIZE);
if (0 > n)
return -1;
SDPDBG("Read : %d", n);
if (n == 0 || reqhdr->tid != rsphdr->tid) {
errno = EPROTO;
return -1;
}
*rspsize = n;
return 0;
}
/*
* singly-linked lists (after openobex implementation)
*/
sdp_list_t *sdp_list_append(sdp_list_t *p, void *d)
{
sdp_list_t *q, *n = malloc(sizeof(sdp_list_t));
if (!n)
return NULL;
n->data = d;
n->next = 0;
if (!p)
return n;
for (q = p; q->next; q = q->next);
q->next = n;
return p;
}
sdp_list_t *sdp_list_remove(sdp_list_t *list, void *d)
{
sdp_list_t *p, *q;
for (q = 0, p = list; p; q = p, p = p->next)
if (p->data == d) {
if (q)
q->next = p->next;
else
list = p->next;
free(p);
break;
}
return list;
}
sdp_list_t *sdp_list_insert_sorted(sdp_list_t *list, void *d,
sdp_comp_func_t f)
{
sdp_list_t *q, *p, *n;
n = malloc(sizeof(sdp_list_t));
if (!n)
return NULL;
n->data = d;
for (q = 0, p = list; p; q = p, p = p->next)
if (f(p->data, d) >= 0)
break;
/* insert between q and p; if !q insert at head */
if (q)
q->next = n;
else
list = n;
n->next = p;
return list;
}
/*
* Every element of the list points to things which need
* to be free()'d. This method frees the list's contents
*/
void sdp_list_free(sdp_list_t *list, sdp_free_func_t f)
{
sdp_list_t *next;
while (list) {
next = list->next;
if (f)
f(list->data);
free(list);
list = next;
}
}
static inline int __find_port(sdp_data_t *seq, int proto)
{
if (!seq || !seq->next)
return 0;
if (SDP_IS_UUID(seq->dtd) && sdp_uuid_to_proto(&seq->val.uuid) == proto) {
seq = seq->next;
switch (seq->dtd) {
case SDP_UINT8:
return seq->val.uint8;
case SDP_UINT16:
return seq->val.uint16;
}
}
return 0;
}
int sdp_get_proto_port(const sdp_list_t *list, int proto)
{
if (proto != L2CAP_UUID && proto != RFCOMM_UUID) {
errno = EINVAL;
return -1;
}
for (; list; list = list->next) {
sdp_list_t *p;
for (p = list->data; p; p = p->next) {
sdp_data_t *seq = p->data;
int port = __find_port(seq, proto);
if (port)
return port;
}
}
return 0;
}
sdp_data_t *sdp_get_proto_desc(sdp_list_t *list, int proto)
{
for (; list; list = list->next) {
sdp_list_t *p;
for (p = list->data; p; p = p->next) {
sdp_data_t *seq = p->data;
if (SDP_IS_UUID(seq->dtd) &&
sdp_uuid_to_proto(&seq->val.uuid) == proto)
return seq->next;
}
}
return NULL;
}
static int sdp_get_proto_descs(uint16_t attr_id, const sdp_record_t *rec,
sdp_list_t **pap)
{
sdp_data_t *pdlist, *curr;
sdp_list_t *ap = NULL;
pdlist = sdp_data_get(rec, attr_id);
if (pdlist == NULL) {
errno = ENODATA;
return -1;
}
SDPDBG("Attribute value type: 0x%02x", pdlist->dtd);
if (attr_id == SDP_ATTR_ADD_PROTO_DESC_LIST) {
if (!SDP_IS_SEQ(pdlist->dtd)) {
errno = EINVAL;
return -1;
}
pdlist = pdlist->val.dataseq;
}
for (; pdlist; pdlist = pdlist->next) {
sdp_list_t *pds = NULL;
if (!SDP_IS_SEQ(pdlist->dtd) && !SDP_IS_ALT(pdlist->dtd))
goto failed;
for (curr = pdlist->val.dataseq; curr; curr = curr->next) {
if (!SDP_IS_SEQ(curr->dtd)) {
sdp_list_free(pds, NULL);
goto failed;
}
pds = sdp_list_append(pds, curr->val.dataseq);
}
ap = sdp_list_append(ap, pds);
}
*pap = ap;
return 0;
failed:
sdp_list_foreach(ap, (sdp_list_func_t) sdp_list_free, NULL);
sdp_list_free(ap, NULL);
errno = EINVAL;
return -1;
}
int sdp_get_access_protos(const sdp_record_t *rec, sdp_list_t **pap)
{
return sdp_get_proto_descs(SDP_ATTR_PROTO_DESC_LIST, rec, pap);
}
int sdp_get_add_access_protos(const sdp_record_t *rec, sdp_list_t **pap)
{
return sdp_get_proto_descs(SDP_ATTR_ADD_PROTO_DESC_LIST, rec, pap);
}
int sdp_get_uuidseq_attr(const sdp_record_t *rec, uint16_t attr,
sdp_list_t **seqp)
{
sdp_data_t *sdpdata = sdp_data_get(rec, attr);
*seqp = NULL;
if (sdpdata && SDP_IS_SEQ(sdpdata->dtd)) {
sdp_data_t *d;
for (d = sdpdata->val.dataseq; d; d = d->next) {
uuid_t *u;
if (d->dtd < SDP_UUID16 || d->dtd > SDP_UUID128) {
errno = EINVAL;
goto fail;
}
u = malloc(sizeof(uuid_t));
if (!u)
goto fail;
*u = d->val.uuid;
*seqp = sdp_list_append(*seqp, u);
}
return 0;
}
fail:
sdp_list_free(*seqp, free);
*seqp = NULL;
return -1;
}
int sdp_set_uuidseq_attr(sdp_record_t *rec, uint16_t aid, sdp_list_t *seq)
{
int status = 0, i, len;
void **dtds, **values;
uint8_t uuid16 = SDP_UUID16;
uint8_t uuid32 = SDP_UUID32;
uint8_t uuid128 = SDP_UUID128;
sdp_list_t *p;
len = sdp_list_len(seq);
if (!seq || len == 0)
return -1;
dtds = malloc(len * sizeof(void *));
if (!dtds)
return -1;
values = malloc(len * sizeof(void *));
if (!values) {
free(dtds);
return -1;
}
for (p = seq, i = 0; i < len; i++, p = p->next) {
uuid_t *uuid = p->data;
if (uuid)
switch (uuid->type) {
case SDP_UUID16:
dtds[i] = &uuid16;
values[i] = &uuid->value.uuid16;
break;
case SDP_UUID32:
dtds[i] = &uuid32;
values[i] = &uuid->value.uuid32;
break;
case SDP_UUID128:
dtds[i] = &uuid128;
values[i] = &uuid->value.uuid128;
break;
default:
status = -1;
break;
}
else {
status = -1;
break;
}
}
if (status == 0) {
sdp_data_t *data = sdp_seq_alloc(dtds, values, len);
sdp_attr_replace(rec, aid, data);
sdp_pattern_add_uuidseq(rec, seq);
}
free(dtds);
free(values);
return status;
}
int sdp_get_lang_attr(const sdp_record_t *rec, sdp_list_t **langSeq)
{
sdp_lang_attr_t *lang;
sdp_data_t *sdpdata, *curr_data;
*langSeq = NULL;
sdpdata = sdp_data_get(rec, SDP_ATTR_LANG_BASE_ATTR_ID_LIST);
if (sdpdata == NULL) {
errno = ENODATA;
return -1;
}
if (!SDP_IS_SEQ(sdpdata->dtd))
goto invalid;
curr_data = sdpdata->val.dataseq;
while (curr_data) {
sdp_data_t *pCode, *pEncoding, *pOffset;
pCode = curr_data;
if (pCode->dtd != SDP_UINT16)
goto invalid;
/* LanguageBaseAttributeIDList entries are always grouped as
* triplets */
if (!pCode->next || !pCode->next->next)
goto invalid;
pEncoding = pCode->next;
if (pEncoding->dtd != SDP_UINT16)
goto invalid;
pOffset = pEncoding->next;
if (pOffset->dtd != SDP_UINT16)
goto invalid;
lang = malloc(sizeof(sdp_lang_attr_t));
if (!lang) {
sdp_list_free(*langSeq, free);
*langSeq = NULL;
return -1;
}
lang->code_ISO639 = pCode->val.uint16;
lang->encoding = pEncoding->val.uint16;
lang->base_offset = pOffset->val.uint16;
SDPDBG("code_ISO639 : 0x%02x", lang->code_ISO639);
SDPDBG("encoding : 0x%02x", lang->encoding);
SDPDBG("base_offfset : 0x%02x", lang->base_offset);
*langSeq = sdp_list_append(*langSeq, lang);
curr_data = pOffset->next;
}
return 0;
invalid:
sdp_list_free(*langSeq, free);
*langSeq = NULL;
errno = EINVAL;
return -1;
}
int sdp_get_profile_descs(const sdp_record_t *rec, sdp_list_t **profDescSeq)
{
sdp_profile_desc_t *profDesc;
sdp_data_t *sdpdata, *seq;
*profDescSeq = NULL;
sdpdata = sdp_data_get(rec, SDP_ATTR_PFILE_DESC_LIST);
if (sdpdata == NULL) {
errno = ENODATA;
return -1;
}
if (!SDP_IS_SEQ(sdpdata->dtd) || sdpdata->val.dataseq == NULL)
goto invalid;
for (seq = sdpdata->val.dataseq; seq; seq = seq->next) {
uuid_t *uuid = NULL;
uint16_t version = 0x100;
if (SDP_IS_UUID(seq->dtd)) {
/* Mac OS X 10.7.3 and old Samsung phones do not comply
* to the SDP specification for
* BluetoothProfileDescriptorList. This workaround
* allows to properly parse UUID/version from SDP
* record published by these systems. */
sdp_data_t *next = seq->next;
uuid = &seq->val.uuid;
if (next && next->dtd == SDP_UINT16) {
version = next->val.uint16;
seq = next;
}
} else if (SDP_IS_SEQ(seq->dtd)) {
sdp_data_t *puuid, *pVnum;
puuid = seq->val.dataseq;
if (puuid == NULL || !SDP_IS_UUID(puuid->dtd))
goto invalid;
uuid = &puuid->val.uuid;
pVnum = puuid->next;
if (pVnum == NULL || pVnum->dtd != SDP_UINT16)
goto invalid;
version = pVnum->val.uint16;
} else
goto invalid;
if (uuid != NULL) {
profDesc = malloc(sizeof(sdp_profile_desc_t));
if (!profDesc) {
sdp_list_free(*profDescSeq, free);
*profDescSeq = NULL;
return -1;
}
profDesc->uuid = *uuid;
profDesc->version = version;
#ifdef SDP_DEBUG
sdp_uuid_print(&profDesc->uuid);
SDPDBG("Vnum : 0x%04x", profDesc->version);
#endif
*profDescSeq = sdp_list_append(*profDescSeq, profDesc);
}
}
return 0;
invalid:
sdp_list_free(*profDescSeq, free);
*profDescSeq = NULL;
errno = EINVAL;
return -1;
}
int sdp_get_server_ver(const sdp_record_t *rec, sdp_list_t **u16)
{
sdp_data_t *d, *curr;
*u16 = NULL;
d = sdp_data_get(rec, SDP_ATTR_VERSION_NUM_LIST);
if (d == NULL) {
errno = ENODATA;
return -1;
}
if (!SDP_IS_SEQ(d->dtd) || d->val.dataseq == NULL)
goto invalid;
for (curr = d->val.dataseq; curr; curr = curr->next) {
if (curr->dtd != SDP_UINT16)
goto invalid;
*u16 = sdp_list_append(*u16, &curr->val.uint16);
}
return 0;
invalid:
sdp_list_free(*u16, NULL);
*u16 = NULL;
errno = EINVAL;
return -1;
}
/* flexible extraction of basic attributes - Jean II */
/* How do we expect caller to extract predefined data sequences? */
int sdp_get_int_attr(const sdp_record_t *rec, uint16_t attrid, int *value)
{
sdp_data_t *sdpdata = sdp_data_get(rec, attrid);
if (sdpdata)
/* Verify that it is what the caller expects */
if (sdpdata->dtd == SDP_BOOL || sdpdata->dtd == SDP_UINT8 ||
sdpdata->dtd == SDP_UINT16 || sdpdata->dtd == SDP_UINT32 ||
sdpdata->dtd == SDP_INT8 || sdpdata->dtd == SDP_INT16 ||
sdpdata->dtd == SDP_INT32) {
*value = sdpdata->val.uint32;
return 0;
}
errno = EINVAL;
return -1;
}
int sdp_get_string_attr(const sdp_record_t *rec, uint16_t attrid, char *value,
size_t valuelen)
{
sdp_data_t *sdpdata = sdp_data_get(rec, attrid);
/* Verify that it is what the caller expects */
if (!sdpdata || !SDP_IS_TEXT_STR(sdpdata->dtd))
goto fail;
/* Have to copy the NULL terminator too, so check len < valuelen. */
if (strlen(sdpdata->val.str) < valuelen) {
strcpy(value, sdpdata->val.str);
return 0;
}
fail:
errno = EINVAL;
return -1;
}
#define get_basic_attr(attrID, pAttrValue, fieldName) \
sdp_data_t *data = sdp_data_get(rec, attrID); \
if (data) { \
*pAttrValue = data->val.fieldName; \
return 0; \
} \
errno = EINVAL; \
return -1;
int sdp_get_service_id(const sdp_record_t *rec, uuid_t *uuid)
{
get_basic_attr(SDP_ATTR_SERVICE_ID, uuid, uuid);
}
int sdp_get_group_id(const sdp_record_t *rec, uuid_t *uuid)
{
get_basic_attr(SDP_ATTR_GROUP_ID, uuid, uuid);
}
int sdp_get_record_state(const sdp_record_t *rec, uint32_t *svcRecState)
{
get_basic_attr(SDP_ATTR_RECORD_STATE, svcRecState, uint32);
}
int sdp_get_service_avail(const sdp_record_t *rec, uint8_t *svcAvail)
{
get_basic_attr(SDP_ATTR_SERVICE_AVAILABILITY, svcAvail, uint8);
}
int sdp_get_service_ttl(const sdp_record_t *rec, uint32_t *svcTTLInfo)
{
get_basic_attr(SDP_ATTR_SVCINFO_TTL, svcTTLInfo, uint32);
}
int sdp_get_database_state(const sdp_record_t *rec, uint32_t *svcDBState)
{
get_basic_attr(SDP_ATTR_SVCDB_STATE, svcDBState, uint32);
}
/*
* NOTE that none of the setXXX() functions below will
* actually update the SDP server, unless the
* {register, update}sdp_record_t() function is invoked.
*/
int sdp_attr_add_new(sdp_record_t *rec, uint16_t attr, uint8_t dtd,
const void *value)
{
sdp_data_t *d = sdp_data_alloc(dtd, value);
if (d) {
sdp_attr_replace(rec, attr, d);
return 0;
}
return -1;
}
static int sdp_attr_add_new_with_length(sdp_record_t *rec,
uint16_t attr, uint8_t dtd, const void *value, uint32_t len)
{
sdp_data_t *d;
d = sdp_data_alloc_with_length(dtd, value, len);
if (!d)
return -1;
sdp_attr_replace(rec, attr, d);
return 0;
}
/*
* Set the information attributes of the service
* pointed to by rec. The attributes are
* service name, description and provider name
*/
void sdp_set_info_attr(sdp_record_t *rec, const char *name, const char *prov,
const char *desc)
{
if (name)
sdp_attr_add_new(rec, SDP_ATTR_SVCNAME_PRIMARY,
SDP_TEXT_STR8, name);
if (prov)
sdp_attr_add_new(rec, SDP_ATTR_PROVNAME_PRIMARY,
SDP_TEXT_STR8, prov);
if (desc)
sdp_attr_add_new(rec, SDP_ATTR_SVCDESC_PRIMARY,
SDP_TEXT_STR8, desc);
}
static sdp_data_t *access_proto_to_dataseq(sdp_record_t *rec, sdp_list_t *proto)
{
sdp_data_t *seq = NULL;
void *dtds[10], *values[10];
void **seqDTDs, **seqs;
int i, seqlen;
sdp_list_t *p;
seqlen = sdp_list_len(proto);
seqDTDs = bt_malloc0(seqlen * sizeof(void *));
if (!seqDTDs)
return NULL;
seqs = malloc(seqlen * sizeof(void *));
if (!seqs) {
free(seqDTDs);
return NULL;
}
for (i = 0, p = proto; p; p = p->next, i++) {
sdp_list_t *elt = p->data;
sdp_data_t *s;
uuid_t *uuid = NULL;
unsigned int pslen = 0;
for (; elt && pslen < ARRAY_SIZE(dtds); elt = elt->next, pslen++) {
sdp_data_t *d = elt->data;
dtds[pslen] = &d->dtd;
switch (d->dtd) {
case SDP_UUID16:
uuid = (uuid_t *) d;
values[pslen] = &uuid->value.uuid16;
break;
case SDP_UUID32:
uuid = (uuid_t *) d;
values[pslen] = &uuid->value.uuid32;
break;
case SDP_UUID128:
uuid = (uuid_t *) d;
values[pslen] = &uuid->value.uuid128;
break;
case SDP_UINT8:
values[pslen] = &d->val.uint8;
break;
case SDP_UINT16:
values[pslen] = &d->val.uint16;
break;
case SDP_SEQ8:
case SDP_SEQ16:
case SDP_SEQ32:
values[pslen] = d;
break;
/* FIXME: more */
}
}
s = sdp_seq_alloc(dtds, values, pslen);
if (s) {
seqDTDs[i] = &s->dtd;
seqs[i] = s;
if (uuid)
sdp_pattern_add_uuid(rec, uuid);
}
}
seq = sdp_seq_alloc(seqDTDs, seqs, seqlen);
free(seqDTDs);
free(seqs);
return seq;
}
/*
* sets the access protocols of the service specified
* to the value specified in "access_proto"
*
* Note that if there are alternate mechanisms by
* which the service is accessed, then they should
* be specified as sequences
*
* Using a value of NULL for accessProtocols has
* effect of removing this attribute (if previously set)
*
* This function replaces the existing sdp_access_proto_t
* structure (if any) with the new one specified.
*
* returns 0 if successful or -1 if there is a failure.
*/
int sdp_set_access_protos(sdp_record_t *rec, const sdp_list_t *ap)
{
const sdp_list_t *p;
sdp_data_t *protos = NULL;
for (p = ap; p; p = p->next) {
sdp_data_t *seq = access_proto_to_dataseq(rec, p->data);
protos = sdp_seq_append(protos, seq);
}
sdp_attr_add(rec, SDP_ATTR_PROTO_DESC_LIST, protos);
return 0;
}
int sdp_set_add_access_protos(sdp_record_t *rec, const sdp_list_t *ap)
{
const sdp_list_t *p;
sdp_data_t *protos = NULL;
for (p = ap; p; p = p->next) {
sdp_data_t *seq = access_proto_to_dataseq(rec, p->data);
protos = sdp_seq_append(protos, seq);
}
sdp_attr_add(rec, SDP_ATTR_ADD_PROTO_DESC_LIST,
protos ? sdp_data_alloc(SDP_SEQ8, protos) : NULL);
return 0;
}
/*
* set the "LanguageBase" attributes of the service record
* record to the value specified in "langAttrList".
*
* "langAttrList" is a linked list of "sdp_lang_attr_t"
* objects, one for each language in which user visible
* attributes are present in the service record.
*
* Using a value of NULL for langAttrList has
* effect of removing this attribute (if previously set)
*
* This function replaces the exisiting sdp_lang_attr_t
* structure (if any) with the new one specified.
*
* returns 0 if successful or -1 if there is a failure.
*/
int sdp_set_lang_attr(sdp_record_t *rec, const sdp_list_t *seq)
{
uint8_t uint16 = SDP_UINT16;
int status = 0, i = 0, seqlen = sdp_list_len(seq);
void **dtds, **values;
const sdp_list_t *p;
dtds = malloc(3 * seqlen * sizeof(void *));
if (!dtds)
return -1;
values = malloc(3 * seqlen * sizeof(void *));
if (!values) {
free(dtds);
return -1;
}
for (p = seq; p; p = p->next) {
sdp_lang_attr_t *lang = p->data;
if (!lang) {
status = -1;
break;
}
dtds[i] = &uint16;
values[i] = &lang->code_ISO639;
i++;
dtds[i] = &uint16;
values[i] = &lang->encoding;
i++;
dtds[i] = &uint16;
values[i] = &lang->base_offset;
i++;
}
if (status == 0) {
sdp_data_t *seq = sdp_seq_alloc(dtds, values, 3 * seqlen);
sdp_attr_add(rec, SDP_ATTR_LANG_BASE_ATTR_ID_LIST, seq);
}
free(dtds);
free(values);
return status;
}
/*
* set the "ServiceID" attribute of the service.
*
* This is the UUID of the service.
*
* returns 0 if successful or -1 if there is a failure.
*/
void sdp_set_service_id(sdp_record_t *rec, uuid_t uuid)
{
switch (uuid.type) {
case SDP_UUID16:
sdp_attr_add_new(rec, SDP_ATTR_SERVICE_ID, SDP_UUID16,
&uuid.value.uuid16);
break;
case SDP_UUID32:
sdp_attr_add_new(rec, SDP_ATTR_SERVICE_ID, SDP_UUID32,
&uuid.value.uuid32);
break;
case SDP_UUID128:
sdp_attr_add_new(rec, SDP_ATTR_SERVICE_ID, SDP_UUID128,
&uuid.value.uuid128);
break;
}
sdp_pattern_add_uuid(rec, &uuid);
}
/*
* set the GroupID attribute of the service record defining a group.
*
* This is the UUID of the group.
*
* returns 0 if successful or -1 if there is a failure.
*/
void sdp_set_group_id(sdp_record_t *rec, uuid_t uuid)
{
switch (uuid.type) {
case SDP_UUID16:
sdp_attr_add_new(rec, SDP_ATTR_GROUP_ID, SDP_UUID16,
&uuid.value.uuid16);
break;
case SDP_UUID32:
sdp_attr_add_new(rec, SDP_ATTR_GROUP_ID, SDP_UUID32,
&uuid.value.uuid32);
break;
case SDP_UUID128:
sdp_attr_add_new(rec, SDP_ATTR_GROUP_ID, SDP_UUID128,
&uuid.value.uuid128);
break;
}
sdp_pattern_add_uuid(rec, &uuid);
}
/*
* set the ProfileDescriptorList attribute of the service record
* pointed to by record to the value specified in "profileDesc".
*
* Each element in the list is an object of type
* sdp_profile_desc_t which is a definition of the
* Bluetooth profile that this service conforms to.
*
* Using a value of NULL for profileDesc has
* effect of removing this attribute (if previously set)
*
* This function replaces the exisiting ProfileDescriptorList
* structure (if any) with the new one specified.
*
* returns 0 if successful or -1 if there is a failure.
*/
int sdp_set_profile_descs(sdp_record_t *rec, const sdp_list_t *profiles)
{
int status = 0;
uint8_t uuid16 = SDP_UUID16;
uint8_t uuid32 = SDP_UUID32;
uint8_t uuid128 = SDP_UUID128;
uint8_t uint16 = SDP_UINT16;
int i = 0, seqlen = sdp_list_len(profiles);
void **seqDTDs, **seqs;
const sdp_list_t *p;
sdp_data_t *pAPSeq;
seqDTDs = malloc(seqlen * sizeof(void *));
if (!seqDTDs)
return -1;
seqs = malloc(seqlen * sizeof(void *));
if (!seqs) {
free(seqDTDs);
return -1;
}
for (p = profiles; p; p = p->next) {
sdp_data_t *seq;
void *dtds[2], *values[2];
sdp_profile_desc_t *profile = p->data;
if (!profile) {
status = -1;
goto end;
}
switch (profile->uuid.type) {
case SDP_UUID16:
dtds[0] = &uuid16;
values[0] = &profile->uuid.value.uuid16;
break;
case SDP_UUID32:
dtds[0] = &uuid32;
values[0] = &profile->uuid.value.uuid32;
break;
case SDP_UUID128:
dtds[0] = &uuid128;
values[0] = &profile->uuid.value.uuid128;
break;
default:
status = -1;
goto end;
}
dtds[1] = &uint16;
values[1] = &profile->version;
seq = sdp_seq_alloc(dtds, values, 2);
if (seq == NULL) {
status = -1;
goto end;
}
seqDTDs[i] = &seq->dtd;
seqs[i] = seq;
sdp_pattern_add_uuid(rec, &profile->uuid);
i++;
}
pAPSeq = sdp_seq_alloc(seqDTDs, seqs, seqlen);
sdp_attr_add(rec, SDP_ATTR_PFILE_DESC_LIST, pAPSeq);
end:
free(seqDTDs);
free(seqs);
return status;
}
/*
* sets various URL attributes of the service
* pointed to by record. The URL include
*
* client: a URL to the client's
* platform specific (WinCE, PalmOS) executable
* code that can be used to access this service.
*
* doc: a URL pointing to service documentation
*
* icon: a URL to an icon that can be used to represent
* this service.
*
* Note that you need to pass NULL for any URLs
* that you don't want to set or remove
*/
void sdp_set_url_attr(sdp_record_t *rec, const char *client, const char *doc,
const char *icon)
{
sdp_attr_add_new(rec, SDP_ATTR_CLNT_EXEC_URL, SDP_URL_STR8, client);
sdp_attr_add_new(rec, SDP_ATTR_DOC_URL, SDP_URL_STR8, doc);
sdp_attr_add_new(rec, SDP_ATTR_ICON_URL, SDP_URL_STR8, icon);
}
uuid_t *sdp_uuid16_create(uuid_t *u, uint16_t val)
{
memset(u, 0, sizeof(uuid_t));
u->type = SDP_UUID16;
u->value.uuid16 = val;
return u;
}
uuid_t *sdp_uuid32_create(uuid_t *u, uint32_t val)
{
memset(u, 0, sizeof(uuid_t));
u->type = SDP_UUID32;
u->value.uuid32 = val;
return u;
}
uuid_t *sdp_uuid128_create(uuid_t *u, const void *val)
{
memset(u, 0, sizeof(uuid_t));
u->type = SDP_UUID128;
memcpy(&u->value.uuid128, val, sizeof(uint128_t));
return u;
}
/*
* UUID comparison function
* returns 0 if uuidValue1 == uuidValue2 else -1
*/
int sdp_uuid_cmp(const void *p1, const void *p2)
{
uuid_t *u1 = sdp_uuid_to_uuid128(p1);
uuid_t *u2 = sdp_uuid_to_uuid128(p2);
int ret;
ret = sdp_uuid128_cmp(u1, u2);
bt_free(u1);
bt_free(u2);
return ret;
}
/*
* UUID comparison function
* returns 0 if uuidValue1 == uuidValue2 else -1
*/
int sdp_uuid16_cmp(const void *p1, const void *p2)
{
const uuid_t *u1 = p1;
const uuid_t *u2 = p2;
return memcmp(&u1->value.uuid16, &u2->value.uuid16, sizeof(uint16_t));
}
/*
* UUID comparison function
* returns 0 if uuidValue1 == uuidValue2 else -1
*/
int sdp_uuid128_cmp(const void *p1, const void *p2)
{
const uuid_t *u1 = p1;
const uuid_t *u2 = p2;
return memcmp(&u1->value.uuid128, &u2->value.uuid128, sizeof(uint128_t));
}
/*
* 128 to 16 bit and 32 to 16 bit UUID conversion functions
* yet to be implemented. Note that the input is in NBO in
* both 32 and 128 bit UUIDs and conversion is needed
*/
void sdp_uuid16_to_uuid128(uuid_t *uuid128, const uuid_t *uuid16)
{
/*
* We have a 16 bit value, which needs to be added to
* bytes 3 and 4 (at indices 2 and 3) of the Bluetooth base
*/
unsigned short data1;
/* allocate a 128bit UUID and init to the Bluetooth base UUID */
uuid128->value.uuid128 = bluetooth_base_uuid;
uuid128->type = SDP_UUID128;
/* extract bytes 2 and 3 of 128bit BT base UUID */
memcpy(&data1, &bluetooth_base_uuid.data[2], 2);
/* add the given UUID (16 bits) */
data1 += htons(uuid16->value.uuid16);
/* set bytes 2 and 3 of the 128 bit value */
memcpy(&uuid128->value.uuid128.data[2], &data1, 2);
}
void sdp_uuid32_to_uuid128(uuid_t *uuid128, const uuid_t *uuid32)
{
/*
* We have a 32 bit value, which needs to be added to
* bytes 1->4 (at indices 0 thru 3) of the Bluetooth base
*/
unsigned int data0;
/* allocate a 128bit UUID and init to the Bluetooth base UUID */
uuid128->value.uuid128 = bluetooth_base_uuid;
uuid128->type = SDP_UUID128;
/* extract first 4 bytes */
memcpy(&data0, &bluetooth_base_uuid.data[0], 4);
/* add the given UUID (32bits) */
data0 += htonl(uuid32->value.uuid32);
/* set the 4 bytes of the 128 bit value */
memcpy(&uuid128->value.uuid128.data[0], &data0, 4);
}
uuid_t *sdp_uuid_to_uuid128(const uuid_t *uuid)
{
uuid_t *uuid128 = bt_malloc0(sizeof(uuid_t));
if (!uuid128)
return NULL;
switch (uuid->type) {
case SDP_UUID128:
*uuid128 = *uuid;
break;
case SDP_UUID32:
sdp_uuid32_to_uuid128(uuid128, uuid);
break;
case SDP_UUID16:
sdp_uuid16_to_uuid128(uuid128, uuid);
break;
}
return uuid128;
}
/*
* converts a 128-bit uuid to a 16/32-bit one if possible
* returns true if uuid contains a 16/32-bit UUID at exit
*/
int sdp_uuid128_to_uuid(uuid_t *uuid)
{
const uint128_t *b = &bluetooth_base_uuid;
uint128_t *u = &uuid->value.uuid128;
uint32_t data;
unsigned int i;
if (uuid->type != SDP_UUID128)
return 1;
for (i = 4; i < sizeof(b->data); i++)
if (b->data[i] != u->data[i])
return 0;
memcpy(&data, u->data, 4);
data = htonl(data);
if (data <= 0xffff) {
uuid->type = SDP_UUID16;
uuid->value.uuid16 = (uint16_t) data;
} else {
uuid->type = SDP_UUID32;
uuid->value.uuid32 = data;
}
return 1;
}
/*
* convert a UUID to the 16-bit short-form
*/
int sdp_uuid_to_proto(uuid_t *uuid)
{
uuid_t u = *uuid;
if (sdp_uuid128_to_uuid(&u)) {
switch (u.type) {
case SDP_UUID16:
return u.value.uuid16;
case SDP_UUID32:
return u.value.uuid32;
}
}
return 0;
}
/*
* This function appends data to the PDU buffer "dst" from source "src".
* The data length is also computed and set.
* Should the PDU length exceed 2^8, then sequence type is
* set accordingly and the data is memmove()'d.
*/
void sdp_append_to_buf(sdp_buf_t *dst, uint8_t *data, uint32_t len)
{
uint8_t *p = dst->data;
uint8_t dtd = *p;
SDPDBG("Append src size: %d", len);
SDPDBG("Append dst size: %d", dst->data_size);
SDPDBG("Dst buffer size: %d", dst->buf_size);
if (dst->data_size + len > dst->buf_size) {
SDPERR("Cannot append");
return;
}
if (dst->data_size == 0 && dtd == 0) {
/* create initial sequence */
*p = SDP_SEQ8;
dst->data_size += sizeof(uint8_t);
/* reserve space for sequence size */
dst->data_size += sizeof(uint8_t);
}
memcpy(dst->data + dst->data_size, data, len);
dst->data_size += len;
dtd = *(uint8_t *) dst->data;
if (dst->data_size > UCHAR_MAX && dtd == SDP_SEQ8) {
short offset = sizeof(uint8_t) + sizeof(uint8_t);
memmove(dst->data + offset + 1, dst->data + offset,
dst->data_size - offset);
*p = SDP_SEQ16;
dst->data_size += 1;
}
dtd = *(uint8_t *) p;
p += sizeof(uint8_t);
switch (dtd) {
case SDP_SEQ8:
*(uint8_t *) p = dst->data_size - sizeof(uint8_t) - sizeof(uint8_t);
break;
case SDP_SEQ16:
bt_put_be16(dst->data_size - sizeof(uint8_t) - sizeof(uint16_t), p);
break;
case SDP_SEQ32:
bt_put_be32(dst->data_size - sizeof(uint8_t) - sizeof(uint32_t), p);
break;
}
}
void sdp_append_to_pdu(sdp_buf_t *pdu, sdp_data_t *d)
{
sdp_buf_t append;
memset(&append, 0, sizeof(sdp_buf_t));
sdp_gen_buffer(&append, d);
append.data = malloc(append.buf_size);
if (!append.data)
return;
sdp_set_attrid(&append, d->attrId);
sdp_gen_pdu(&append, d);
sdp_append_to_buf(pdu, append.data, append.data_size);
free(append.data);
}
/*
* Registers an sdp record.
*
* It is incorrect to call this method on a record that
* has been already registered with the server.
*
* Returns zero on success, otherwise -1 (and sets errno).
*/
int sdp_device_record_register_binary(sdp_session_t *session, bdaddr_t *device, uint8_t *data, uint32_t size, uint8_t flags, uint32_t *handle)
{
uint8_t *req, *rsp, *p;
uint32_t reqsize, rspsize;
sdp_pdu_hdr_t *reqhdr, *rsphdr;
int status;
SDPDBG("");
if (!session->local) {
errno = EREMOTE;
return -1;
}
req = malloc(SDP_REQ_BUFFER_SIZE);
rsp = malloc(SDP_RSP_BUFFER_SIZE);
if (req == NULL || rsp == NULL) {
status = -1;
errno = ENOMEM;
goto end;
}
reqhdr = (sdp_pdu_hdr_t *)req;
reqhdr->pdu_id = SDP_SVC_REGISTER_REQ;
reqhdr->tid = htons(sdp_gen_tid(session));
reqsize = sizeof(sdp_pdu_hdr_t) + 1;
p = req + sizeof(sdp_pdu_hdr_t);
if (bacmp(device, BDADDR_ANY)) {
*p++ = flags | SDP_DEVICE_RECORD;
bacpy((bdaddr_t *) p, device);
p += sizeof(bdaddr_t);
reqsize += sizeof(bdaddr_t);
} else
*p++ = flags;
memcpy(p, data, size);
reqsize += size;
reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t));
status = sdp_send_req_w4_rsp(session, req, rsp, reqsize, &rspsize);
if (status < 0)
goto end;
if (rspsize < sizeof(sdp_pdu_hdr_t)) {
SDPERR("Unexpected end of packet");
errno = EPROTO;
status = -1;
goto end;
}
rsphdr = (sdp_pdu_hdr_t *) rsp;
p = rsp + sizeof(sdp_pdu_hdr_t);
if (rsphdr->pdu_id == SDP_ERROR_RSP) {
/* Invalid service record */
errno = EINVAL;
status = -1;
} else if (rsphdr->pdu_id != SDP_SVC_REGISTER_RSP) {
errno = EPROTO;
status = -1;
} else {
if (rspsize < sizeof(sdp_pdu_hdr_t) + sizeof(uint32_t)) {
SDPERR("Unexpected end of packet");
errno = EPROTO;
status = -1;
goto end;
}
if (handle)
*handle = bt_get_be32(p);
}
end:
free(req);
free(rsp);
return status;
}
int sdp_device_record_register(sdp_session_t *session, bdaddr_t *device, sdp_record_t *rec, uint8_t flags)
{
sdp_buf_t pdu;
uint32_t handle;
int err;
SDPDBG("");
if (rec->handle && rec->handle != 0xffffffff) {
uint32_t handle = rec->handle;
sdp_data_t *data = sdp_data_alloc(SDP_UINT32, &handle);
sdp_attr_replace(rec, SDP_ATTR_RECORD_HANDLE, data);
}
if (sdp_gen_record_pdu(rec, &pdu) < 0) {
errno = ENOMEM;
return -1;
}
err = sdp_device_record_register_binary(session, device,
pdu.data, pdu.data_size, flags, &handle);
free(pdu.data);
if (err == 0) {
sdp_data_t *data = sdp_data_alloc(SDP_UINT32, &handle);
rec->handle = handle;
sdp_attr_replace(rec, SDP_ATTR_RECORD_HANDLE, data);
}
return err;
}
int sdp_record_register(sdp_session_t *session, sdp_record_t *rec, uint8_t flags)
{
return sdp_device_record_register(session, BDADDR_ANY, rec, flags);
}
/*
* unregister a service record
*/
int sdp_device_record_unregister_binary(sdp_session_t *session, bdaddr_t *device, uint32_t handle)
{
uint8_t *reqbuf, *rspbuf, *p;
uint32_t reqsize = 0, rspsize = 0;
sdp_pdu_hdr_t *reqhdr, *rsphdr;
int status;
SDPDBG("");
if (handle == SDP_SERVER_RECORD_HANDLE) {
errno = EINVAL;
return -1;
}
if (!session->local) {
errno = EREMOTE;
return -1;
}
reqbuf = malloc(SDP_REQ_BUFFER_SIZE);
rspbuf = malloc(SDP_RSP_BUFFER_SIZE);
if (!reqbuf || !rspbuf) {
errno = ENOMEM;
status = -1;
goto end;
}
reqhdr = (sdp_pdu_hdr_t *) reqbuf;
reqhdr->pdu_id = SDP_SVC_REMOVE_REQ;
reqhdr->tid = htons(sdp_gen_tid(session));
p = reqbuf + sizeof(sdp_pdu_hdr_t);
reqsize = sizeof(sdp_pdu_hdr_t);
bt_put_be32(handle, p);
reqsize += sizeof(uint32_t);
reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t));
status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize);
if (status < 0)
goto end;
if (rspsize < sizeof(sdp_pdu_hdr_t) + sizeof(uint16_t)) {
SDPERR("Unexpected end of packet");
errno = EPROTO;
status = -1;
goto end;
}
rsphdr = (sdp_pdu_hdr_t *) rspbuf;
p = rspbuf + sizeof(sdp_pdu_hdr_t);
if (rsphdr->pdu_id == SDP_ERROR_RSP) {
/* For this case the status always is invalid record handle */
errno = EINVAL;
status = -1;
} else if (rsphdr->pdu_id != SDP_SVC_REMOVE_RSP) {
errno = EPROTO;
status = -1;
} else {
uint16_t tmp;
memcpy(&tmp, p, sizeof(tmp));
status = tmp;
}
end:
free(reqbuf);
free(rspbuf);
return status;
}
int sdp_device_record_unregister(sdp_session_t *session, bdaddr_t *device, sdp_record_t *rec)
{
int err;
err = sdp_device_record_unregister_binary(session, device, rec->handle);
if (err == 0)
sdp_record_free(rec);
return err;
}
int sdp_record_unregister(sdp_session_t *session, sdp_record_t *rec)
{
return sdp_device_record_unregister(session, BDADDR_ANY, rec);
}
/*
* modify an existing service record
*/
int sdp_device_record_update_binary(sdp_session_t *session, bdaddr_t *device, uint32_t handle, uint8_t *data, uint32_t size)
{
return -1;
}
int sdp_device_record_update(sdp_session_t *session, bdaddr_t *device, const sdp_record_t *rec)
{
uint8_t *reqbuf, *rspbuf, *p;
uint32_t reqsize, rspsize;
sdp_pdu_hdr_t *reqhdr, *rsphdr;
uint32_t handle;
sdp_buf_t pdu;
int status;
SDPDBG("");
handle = rec->handle;
if (handle == SDP_SERVER_RECORD_HANDLE) {
errno = EINVAL;
return -1;
}
if (!session->local) {
errno = EREMOTE;
return -1;
}
reqbuf = malloc(SDP_REQ_BUFFER_SIZE);
rspbuf = malloc(SDP_RSP_BUFFER_SIZE);
if (!reqbuf || !rspbuf) {
errno = ENOMEM;
status = -1;
goto end;
}
reqhdr = (sdp_pdu_hdr_t *) reqbuf;
reqhdr->pdu_id = SDP_SVC_UPDATE_REQ;
reqhdr->tid = htons(sdp_gen_tid(session));
p = reqbuf + sizeof(sdp_pdu_hdr_t);
reqsize = sizeof(sdp_pdu_hdr_t);
bt_put_be32(handle, p);
reqsize += sizeof(uint32_t);
p += sizeof(uint32_t);
if (sdp_gen_record_pdu(rec, &pdu) < 0) {
errno = ENOMEM;
status = -1;
goto end;
}
memcpy(p, pdu.data, pdu.data_size);
reqsize += pdu.data_size;
free(pdu.data);
reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t));
status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize);
if (status < 0)
goto end;
if (rspsize < sizeof(sdp_pdu_hdr_t) + sizeof(uint16_t)) {
SDPERR("Unexpected end of packet");
errno = EPROTO;
status = -1;
goto end;
}
SDPDBG("Send req status : %d", status);
rsphdr = (sdp_pdu_hdr_t *) rspbuf;
p = rspbuf + sizeof(sdp_pdu_hdr_t);
if (rsphdr->pdu_id == SDP_ERROR_RSP) {
/* The status can be invalid sintax or invalid record handle */
errno = EINVAL;
status = -1;
} else if (rsphdr->pdu_id != SDP_SVC_UPDATE_RSP) {
errno = EPROTO;
status = -1;
} else {
uint16_t tmp;
memcpy(&tmp, p, sizeof(tmp));
status = tmp;
}
end:
free(reqbuf);
free(rspbuf);
return status;
}
int sdp_record_update(sdp_session_t *session, const sdp_record_t *rec)
{
return sdp_device_record_update(session, BDADDR_ANY, rec);
}
sdp_record_t *sdp_record_alloc(void)
{
sdp_record_t *rec = bt_malloc0(sizeof(sdp_record_t));
if (!rec)
return NULL;
rec->handle = 0xffffffff;
return rec;
}
/*
* Free the contents of a service record
*/
void sdp_record_free(sdp_record_t *rec)
{
sdp_list_free(rec->attrlist, (sdp_free_func_t) sdp_data_free);
sdp_list_free(rec->pattern, free);
free(rec);
}
void sdp_pattern_add_uuid(sdp_record_t *rec, uuid_t *uuid)
{
uuid_t *uuid128 = sdp_uuid_to_uuid128(uuid);
SDPDBG("Elements in target pattern : %d", sdp_list_len(rec->pattern));
SDPDBG("Trying to add : 0x%lx", (unsigned long) uuid128);
if (sdp_list_find(rec->pattern, uuid128, sdp_uuid128_cmp) == NULL)
rec->pattern = sdp_list_insert_sorted(rec->pattern, uuid128, sdp_uuid128_cmp);
else
bt_free(uuid128);
SDPDBG("Elements in target pattern : %d", sdp_list_len(rec->pattern));
}
void sdp_pattern_add_uuidseq(sdp_record_t *rec, sdp_list_t *seq)
{
for (; seq; seq = seq->next) {
uuid_t *uuid = (uuid_t *)seq->data;
sdp_pattern_add_uuid(rec, uuid);
}
}
/*
* Extract a sequence of service record handles from a PDU buffer
* and add the entries to a sdp_list_t. Note that the service record
* handles are not in "data element sequence" form, but just like
* an array of service handles
*/
static void extract_record_handle_seq(uint8_t *pdu, int bufsize, sdp_list_t **seq, int count, unsigned int *scanned)
{
sdp_list_t *pSeq = *seq;
uint8_t *pdata = pdu;
int n;
for (n = 0; n < count; n++) {
uint32_t *pSvcRec;
if (bufsize < (int) sizeof(uint32_t)) {
SDPERR("Unexpected end of packet");
break;
}
pSvcRec = malloc(sizeof(uint32_t));
if (!pSvcRec)
break;
*pSvcRec = bt_get_be32(pdata);
pSeq = sdp_list_append(pSeq, pSvcRec);
pdata += sizeof(uint32_t);
*scanned += sizeof(uint32_t);
bufsize -= sizeof(uint32_t);
}
*seq = pSeq;
}
/*
* Generate the attribute sequence pdu form
* from sdp_list_t elements. Return length of attr seq
*/
static int gen_dataseq_pdu(uint8_t *dst, const sdp_list_t *seq, uint8_t dtd)
{
sdp_data_t *dataseq;
void **types, **values;
sdp_buf_t buf;
int i, seqlen = sdp_list_len(seq);
/* Fill up the value and the dtd arrays */
SDPDBG("");
SDPDBG("Seq length : %d", seqlen);
types = malloc(seqlen * sizeof(void *));
if (!types)
return -ENOMEM;
values = malloc(seqlen * sizeof(void *));
if (!values) {
free(types);
return -ENOMEM;
}
for (i = 0; i < seqlen; i++) {
void *data = seq->data;
types[i] = &dtd;
if (SDP_IS_UUID(dtd))
data = &((uuid_t *)data)->value;
values[i] = data;
seq = seq->next;
}
dataseq = sdp_seq_alloc(types, values, seqlen);
if (!dataseq) {
free(types);
free(values);
return -ENOMEM;
}
memset(&buf, 0, sizeof(sdp_buf_t));
sdp_gen_buffer(&buf, dataseq);
buf.data = malloc(buf.buf_size);
if (!buf.data) {
sdp_data_free(dataseq);
free(types);
free(values);
return -ENOMEM;
}
SDPDBG("Data Seq : 0x%p", seq);
seqlen = sdp_gen_pdu(&buf, dataseq);
SDPDBG("Copying : %d", buf.data_size);
memcpy(dst, buf.data, buf.data_size);
sdp_data_free(dataseq);
free(types);
free(values);
free(buf.data);
return seqlen;
}
static int gen_searchseq_pdu(uint8_t *dst, const sdp_list_t *seq)
{
uuid_t *uuid = seq->data;
return gen_dataseq_pdu(dst, seq, uuid->type);
}
static int gen_attridseq_pdu(uint8_t *dst, const sdp_list_t *seq, uint8_t dataType)
{
return gen_dataseq_pdu(dst, seq, dataType);
}
typedef struct {
uint8_t length;
unsigned char data[16];
} __attribute__ ((packed)) sdp_cstate_t;
static int copy_cstate(uint8_t *pdata, int pdata_len, const sdp_cstate_t *cstate)
{
if (cstate) {
uint8_t len = cstate->length;
if (len >= pdata_len) {
SDPERR("Continuation state size exceeds internal buffer");
len = pdata_len - 1;
}
*pdata++ = len;
memcpy(pdata, cstate->data, len);
return len + 1;
}
*pdata = 0;
return 1;
}
/*
* This is a service search request.
*
* INPUT :
*
* sdp_list_t *search
* Singly linked list containing elements of the search
* pattern. Each entry in the list is a UUID (DataTypeSDP_UUID16)
* of the service to be searched
*
* uint16_t max_rec_num
* A 16 bit integer which tells the service, the maximum
* entries that the client can handle in the response. The
* server is obliged not to return > max_rec_num entries
*
* OUTPUT :
*
* int return value
* 0:
* The request completed successfully. This does not
* mean the requested services were found
* -1:
* On any failure and sets errno
*
* sdp_list_t **rsp_list
* This variable is set on a successful return if there are
* non-zero service handles. It is a singly linked list of
* service record handles (uint16_t)
*/
int sdp_service_search_req(sdp_session_t *session, const sdp_list_t *search,
uint16_t max_rec_num, sdp_list_t **rsp)
{
int status = 0;
uint32_t reqsize = 0, _reqsize;
uint32_t rspsize = 0, rsplen;
int seqlen = 0;
int rec_count;
unsigned scanned, pdata_len;
uint8_t *pdata, *_pdata;
uint8_t *reqbuf, *rspbuf;
sdp_pdu_hdr_t *reqhdr, *rsphdr;
sdp_cstate_t *cstate = NULL;
reqbuf = malloc(SDP_REQ_BUFFER_SIZE);
rspbuf = malloc(SDP_RSP_BUFFER_SIZE);
if (!reqbuf || !rspbuf) {
errno = ENOMEM;
status = -1;
goto end;
}
reqhdr = (sdp_pdu_hdr_t *) reqbuf;
reqhdr->pdu_id = SDP_SVC_SEARCH_REQ;
pdata = reqbuf + sizeof(sdp_pdu_hdr_t);
reqsize = sizeof(sdp_pdu_hdr_t);
/* add service class IDs for search */
seqlen = gen_searchseq_pdu(pdata, search);
if (seqlen < 0) {
errno = EINVAL;
status = -1;
goto end;
}
SDPDBG("Data seq added : %d", seqlen);
/* set the length and increment the pointer */
reqsize += seqlen;
pdata += seqlen;
/* specify the maximum svc rec count that client expects */
bt_put_be16(max_rec_num, pdata);
reqsize += sizeof(uint16_t);
pdata += sizeof(uint16_t);
_reqsize = reqsize;
_pdata = pdata;
*rsp = NULL;
do {
/* Add continuation state or NULL (first time) */
reqsize = _reqsize + copy_cstate(_pdata,
SDP_REQ_BUFFER_SIZE - _reqsize, cstate);
/* Set the request header's param length */
reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t));
reqhdr->tid = htons(sdp_gen_tid(session));
/*
* Send the request, wait for response and if
* no error, set the appropriate values and return
*/
status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize);
if (status < 0)
goto end;
if (rspsize < sizeof(sdp_pdu_hdr_t)) {
SDPERR("Unexpected end of packet");
status = -1;
goto end;
}
rsphdr = (sdp_pdu_hdr_t *) rspbuf;
rsplen = ntohs(rsphdr->plen);
if (rsphdr->pdu_id == SDP_ERROR_RSP) {
SDPDBG("Status : 0x%x", rsphdr->pdu_id);
status = -1;
goto end;
}
scanned = 0;
pdata = rspbuf + sizeof(sdp_pdu_hdr_t);
pdata_len = rspsize - sizeof(sdp_pdu_hdr_t);
if (pdata_len < sizeof(uint16_t) + sizeof(uint16_t)) {
SDPERR("Unexpected end of packet");
status = -1;
goto end;
}
/* net service record match count */
pdata += sizeof(uint16_t);
scanned += sizeof(uint16_t);
pdata_len -= sizeof(uint16_t);
rec_count = bt_get_be16(pdata);
pdata += sizeof(uint16_t);
scanned += sizeof(uint16_t);
pdata_len -= sizeof(uint16_t);
SDPDBG("Current svc count: %d", rec_count);
SDPDBG("ResponseLength: %d", rsplen);
if (!rec_count) {
status = -1;
goto end;
}
extract_record_handle_seq(pdata, pdata_len, rsp, rec_count, &scanned);
SDPDBG("BytesScanned : %d", scanned);
if (rsplen > scanned) {
uint8_t cstate_len;
if (rspsize < sizeof(sdp_pdu_hdr_t) + scanned + sizeof(uint8_t)) {
SDPERR("Unexpected end of packet: continuation state data missing");
status = -1;
goto end;
}
pdata = rspbuf + sizeof(sdp_pdu_hdr_t) + scanned;
cstate_len = *(uint8_t *) pdata;
if (cstate_len > 0) {
cstate = (sdp_cstate_t *)pdata;
SDPDBG("Cont state length: %d", cstate_len);
} else
cstate = NULL;
}
} while (cstate);
end:
free(reqbuf);
free(rspbuf);
return status;
}
/*
* This is a service attribute request.
*
* INPUT :
*
* uint32_t handle
* The handle of the service for which the attribute(s) are
* requested
*
* sdp_attrreq_type_t reqtype
* Attribute identifiers are 16 bit unsigned integers specified
* in one of 2 ways described below :
* SDP_ATTR_REQ_INDIVIDUAL - 16bit individual identifiers
* They are the actual attribute identifiers in ascending order
*
* SDP_ATTR_REQ_RANGE - 32bit identifier range
* The high-order 16bits is the start of range
* the low-order 16bits are the end of range
* 0x0000 to 0xFFFF gets all attributes
*
* sdp_list_t *attrid
* Singly linked list containing attribute identifiers desired.
* Every element is either a uint16_t(attrSpec = SDP_ATTR_REQ_INDIVIDUAL)
* or a uint32_t(attrSpec=SDP_ATTR_REQ_RANGE)
*
* OUTPUT :
* return sdp_record_t *
* 0:
* On any error and sets errno
* !0:
* The service record
*/
sdp_record_t *sdp_service_attr_req(sdp_session_t *session, uint32_t handle,
sdp_attrreq_type_t reqtype, const sdp_list_t *attrids)
{
uint32_t reqsize = 0, _reqsize;
uint32_t rspsize = 0, rsp_count;
int attr_list_len = 0;
int seqlen = 0;
unsigned int pdata_len;
uint8_t *pdata, *_pdata;
uint8_t *reqbuf, *rspbuf;
sdp_pdu_hdr_t *reqhdr, *rsphdr;
sdp_cstate_t *cstate = NULL;
uint8_t cstate_len = 0;
sdp_buf_t rsp_concat_buf;
sdp_record_t *rec = 0;
if (reqtype != SDP_ATTR_REQ_INDIVIDUAL && reqtype != SDP_ATTR_REQ_RANGE) {
errno = EINVAL;
return NULL;
}
memset(&rsp_concat_buf, 0, sizeof(sdp_buf_t));
reqbuf = malloc(SDP_REQ_BUFFER_SIZE);
rspbuf = malloc(SDP_RSP_BUFFER_SIZE);
if (!reqbuf || !rspbuf) {
errno = ENOMEM;
goto end;
}
reqhdr = (sdp_pdu_hdr_t *) reqbuf;
reqhdr->pdu_id = SDP_SVC_ATTR_REQ;
pdata = reqbuf + sizeof(sdp_pdu_hdr_t);
reqsize = sizeof(sdp_pdu_hdr_t);
/* add the service record handle */
bt_put_be32(handle, pdata);
reqsize += sizeof(uint32_t);
pdata += sizeof(uint32_t);
/* specify the response limit */
bt_put_be16(65535, pdata);
reqsize += sizeof(uint16_t);
pdata += sizeof(uint16_t);
/* get attr seq PDU form */
seqlen = gen_attridseq_pdu(pdata, attrids,
reqtype == SDP_ATTR_REQ_INDIVIDUAL? SDP_UINT16 : SDP_UINT32);
if (seqlen < 0) {
errno = EINVAL;
goto end;
}
pdata += seqlen;
reqsize += seqlen;
SDPDBG("Attr list length : %d", seqlen);
/* save before Continuation State */
_pdata = pdata;
_reqsize = reqsize;
do {
int status;
/* add NULL continuation state */
reqsize = _reqsize + copy_cstate(_pdata,
SDP_REQ_BUFFER_SIZE - _reqsize, cstate);
/* set the request header's param length */
reqhdr->tid = htons(sdp_gen_tid(session));
reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t));
status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize);
if (status < 0)
goto end;
if (rspsize < sizeof(sdp_pdu_hdr_t)) {
SDPERR("Unexpected end of packet");
goto end;
}
rsphdr = (sdp_pdu_hdr_t *) rspbuf;
if (rsphdr->pdu_id == SDP_ERROR_RSP) {
SDPDBG("PDU ID : 0x%x", rsphdr->pdu_id);
goto end;
}
pdata = rspbuf + sizeof(sdp_pdu_hdr_t);
pdata_len = rspsize - sizeof(sdp_pdu_hdr_t);
if (pdata_len < sizeof(uint16_t)) {
SDPERR("Unexpected end of packet");
goto end;
}
rsp_count = bt_get_be16(pdata);
attr_list_len += rsp_count;
pdata += sizeof(uint16_t);
pdata_len -= sizeof(uint16_t);
/*
* if continuation state set need to re-issue request before
* parsing
*/
if (pdata_len < rsp_count + sizeof(uint8_t)) {
SDPERR("Unexpected end of packet: continuation state data missing");
goto end;
}
cstate_len = *(uint8_t *) (pdata + rsp_count);
SDPDBG("Response id : %d", rsphdr->pdu_id);
SDPDBG("Attrlist byte count : %d", rsp_count);
SDPDBG("sdp_cstate_t length : %d", cstate_len);
/*
* a split response: concatenate intermediate responses
* and the last one (which has cstate_len == 0)
*/
if (cstate_len > 0 || rsp_concat_buf.data_size != 0) {
uint8_t *targetPtr = NULL;
cstate = cstate_len > 0 ? (sdp_cstate_t *) (pdata + rsp_count) : 0;
/* build concatenated response buffer */
rsp_concat_buf.data = realloc(rsp_concat_buf.data, rsp_concat_buf.data_size + rsp_count);
rsp_concat_buf.buf_size = rsp_concat_buf.data_size + rsp_count;
targetPtr = rsp_concat_buf.data + rsp_concat_buf.data_size;
memcpy(targetPtr, pdata, rsp_count);
rsp_concat_buf.data_size += rsp_count;
}
} while (cstate);
if (attr_list_len > 0) {
int scanned = 0;
if (rsp_concat_buf.data_size != 0) {
pdata = rsp_concat_buf.data;
pdata_len = rsp_concat_buf.data_size;
}
rec = sdp_extract_pdu(pdata, pdata_len, &scanned);
}
end:
free(reqbuf);
free(rsp_concat_buf.data);
free(rspbuf);
return rec;
}
/*
* SDP transaction structure for asynchronous search
*/
struct sdp_transaction {
sdp_callback_t *cb; /* called when the transaction finishes */
void *udata; /* client user data */
uint8_t *reqbuf; /* pointer to request PDU */
sdp_buf_t rsp_concat_buf;
uint32_t reqsize; /* without cstate */
int err; /* ZERO if success or the errno if failed */
};
/*
* Creates a new sdp session for asynchronous search
* INPUT:
* int sk
* non-blocking L2CAP socket
*
* RETURN:
* sdp_session_t *
* NULL - On memory allocation failure
*/
sdp_session_t *sdp_create(int sk, uint32_t flags)
{
sdp_session_t *session;
struct sdp_transaction *t;
session = bt_malloc0(sizeof(sdp_session_t));
if (!session) {
errno = ENOMEM;
return NULL;
}
session->flags = flags;
session->sock = sk;
t = bt_malloc0(sizeof(struct sdp_transaction));
if (!t) {
errno = ENOMEM;
free(session);
return NULL;
}
session->priv = t;
return session;
}
/*
* Sets the callback function/user data used to notify the application
* that the asynchronous transaction finished. This function must be
* called before request an asynchronous search.
*
* INPUT:
* sdp_session_t *session
* Current sdp session to be handled
* sdp_callback_t *cb
* callback to be called when the transaction finishes
* void *udata
* user data passed to callback
* RETURN:
* 0 - Success
* -1 - Failure
*/
int sdp_set_notify(sdp_session_t *session, sdp_callback_t *func, void *udata)
{
struct sdp_transaction *t;
if (!session || !session->priv)
return -1;
t = session->priv;
t->cb = func;
t->udata = udata;
return 0;
}
/*
* This function starts an asynchronous service search request.
* The incoming and outgoing data are stored in the transaction structure
* buffers. When there is incoming data the sdp_process function must be
* called to get the data and handle the continuation state.
*
* INPUT :
* sdp_session_t *session
* Current sdp session to be handled
*
* sdp_list_t *search
* Singly linked list containing elements of the search
* pattern. Each entry in the list is a UUID (DataTypeSDP_UUID16)
* of the service to be searched
*
* uint16_t max_rec_num
* A 16 bit integer which tells the service, the maximum
* entries that the client can handle in the response. The
* server is obliged not to return > max_rec_num entries
*
* OUTPUT :
*
* int return value
* 0 - if the request has been sent properly
* -1 - On any failure and sets errno
*/
int sdp_service_search_async(sdp_session_t *session, const sdp_list_t *search, uint16_t max_rec_num)
{
struct sdp_transaction *t;
sdp_pdu_hdr_t *reqhdr;
uint8_t *pdata;
int cstate_len, seqlen = 0;
if (!session || !session->priv)
return -1;
t = session->priv;
/* clean possible allocated buffer */
free(t->rsp_concat_buf.data);
memset(&t->rsp_concat_buf, 0, sizeof(sdp_buf_t));
if (!t->reqbuf) {
t->reqbuf = malloc(SDP_REQ_BUFFER_SIZE);
if (!t->reqbuf) {
t->err = ENOMEM;
goto end;
}
}
memset(t->reqbuf, 0, SDP_REQ_BUFFER_SIZE);
reqhdr = (sdp_pdu_hdr_t *) t->reqbuf;
reqhdr->tid = htons(sdp_gen_tid(session));
reqhdr->pdu_id = SDP_SVC_SEARCH_REQ;
/* generate PDU */
pdata = t->reqbuf + sizeof(sdp_pdu_hdr_t);
t->reqsize = sizeof(sdp_pdu_hdr_t);
/* add service class IDs for search */
seqlen = gen_searchseq_pdu(pdata, search);
if (seqlen < 0) {
t->err = EINVAL;
goto end;
}
SDPDBG("Data seq added : %d", seqlen);
/* now set the length and increment the pointer */
t->reqsize += seqlen;
pdata += seqlen;
bt_put_be16(max_rec_num, pdata);
t->reqsize += sizeof(uint16_t);
pdata += sizeof(uint16_t);
/* set the request header's param length */
cstate_len = copy_cstate(pdata, SDP_REQ_BUFFER_SIZE - t->reqsize, NULL);
reqhdr->plen = htons((t->reqsize + cstate_len) - sizeof(sdp_pdu_hdr_t));
if (sdp_send_req(session, t->reqbuf, t->reqsize + cstate_len) < 0) {
SDPERR("Error sending data:%m");
t->err = errno;
goto end;
}
return 0;
end:
free(t->reqbuf);
t->reqbuf = NULL;
return -1;
}
/*
* This function starts an asynchronous service attribute request.
* The incoming and outgoing data are stored in the transaction structure
* buffers. When there is incoming data the sdp_process function must be
* called to get the data and handle the continuation state.
*
* INPUT :
* sdp_session_t *session
* Current sdp session to be handled
*
* uint32_t handle
* The handle of the service for which the attribute(s) are
* requested
*
* sdp_attrreq_type_t reqtype
* Attribute identifiers are 16 bit unsigned integers specified
* in one of 2 ways described below :
* SDP_ATTR_REQ_INDIVIDUAL - 16bit individual identifiers
* They are the actual attribute identifiers in ascending order
*
* SDP_ATTR_REQ_RANGE - 32bit identifier range
* The high-order 16bits is the start of range
* the low-order 16bits are the end of range
* 0x0000 to 0xFFFF gets all attributes
*
* sdp_list_t *attrid_list
* Singly linked list containing attribute identifiers desired.
* Every element is either a uint16_t(attrSpec = SDP_ATTR_REQ_INDIVIDUAL)
* or a uint32_t(attrSpec=SDP_ATTR_REQ_RANGE)
*
* OUTPUT :
* int return value
* 0 - if the request has been sent properly
* -1 - On any failure and sets errno
*/
int sdp_service_attr_async(sdp_session_t *session, uint32_t handle, sdp_attrreq_type_t reqtype, const sdp_list_t *attrid_list)
{
struct sdp_transaction *t;
sdp_pdu_hdr_t *reqhdr;
uint8_t *pdata;
int cstate_len, seqlen = 0;
if (!session || !session->priv)
return -1;
t = session->priv;
/* clean possible allocated buffer */
free(t->rsp_concat_buf.data);
memset(&t->rsp_concat_buf, 0, sizeof(sdp_buf_t));
if (!t->reqbuf) {
t->reqbuf = malloc(SDP_REQ_BUFFER_SIZE);
if (!t->reqbuf) {
t->err = ENOMEM;
goto end;
}
}
memset(t->reqbuf, 0, SDP_REQ_BUFFER_SIZE);
reqhdr = (sdp_pdu_hdr_t *) t->reqbuf;
reqhdr->tid = htons(sdp_gen_tid(session));
reqhdr->pdu_id = SDP_SVC_ATTR_REQ;
/* generate PDU */
pdata = t->reqbuf + sizeof(sdp_pdu_hdr_t);
t->reqsize = sizeof(sdp_pdu_hdr_t);
/* add the service record handle */
bt_put_be32(handle, pdata);
t->reqsize += sizeof(uint32_t);
pdata += sizeof(uint32_t);
/* specify the response limit */
bt_put_be16(65535, pdata);
t->reqsize += sizeof(uint16_t);
pdata += sizeof(uint16_t);
/* get attr seq PDU form */
seqlen = gen_attridseq_pdu(pdata, attrid_list,
reqtype == SDP_ATTR_REQ_INDIVIDUAL? SDP_UINT16 : SDP_UINT32);
if (seqlen < 0) {
t->err = EINVAL;
goto end;
}
/* now set the length and increment the pointer */
t->reqsize += seqlen;
pdata += seqlen;
SDPDBG("Attr list length : %d", seqlen);
/* set the request header's param length */
cstate_len = copy_cstate(pdata, SDP_REQ_BUFFER_SIZE - t->reqsize, NULL);
reqhdr->plen = htons((t->reqsize + cstate_len) - sizeof(sdp_pdu_hdr_t));
if (sdp_send_req(session, t->reqbuf, t->reqsize + cstate_len) < 0) {
SDPERR("Error sending data:%m");
t->err = errno;
goto end;
}
return 0;
end:
free(t->reqbuf);
t->reqbuf = NULL;
return -1;
}
/*
* This function starts an asynchronous service search attributes.
* It is a service search request combined with attribute request. The incoming
* and outgoing data are stored in the transaction structure buffers. When there
* is incoming data the sdp_process function must be called to get the data
* and handle the continuation state.
*
* INPUT:
* sdp_session_t *session
* Current sdp session to be handled
*
* sdp_list_t *search
* Singly linked list containing elements of the search
* pattern. Each entry in the list is a UUID(DataTypeSDP_UUID16)
* of the service to be searched
*
* AttributeSpecification attrSpec
* Attribute identifiers are 16 bit unsigned integers specified
* in one of 2 ways described below :
* SDP_ATTR_REQ_INDIVIDUAL - 16bit individual identifiers
* They are the actual attribute identifiers in ascending order
*
* SDP_ATTR_REQ_RANGE - 32bit identifier range
* The high-order 16bits is the start of range
* the low-order 16bits are the end of range
* 0x0000 to 0xFFFF gets all attributes
*
* sdp_list_t *attrid_list
* Singly linked list containing attribute identifiers desired.
* Every element is either a uint16_t(attrSpec = SDP_ATTR_REQ_INDIVIDUAL)
* or a uint32_t(attrSpec=SDP_ATTR_REQ_RANGE)
*
* RETURN:
* 0 - if the request has been sent properly
* -1 - On any failure
*/
int sdp_service_search_attr_async(sdp_session_t *session, const sdp_list_t *search, sdp_attrreq_type_t reqtype, const sdp_list_t *attrid_list)
{
struct sdp_transaction *t;
sdp_pdu_hdr_t *reqhdr;
uint8_t *pdata;
int cstate_len, seqlen = 0;
if (!session || !session->priv)
return -1;
t = session->priv;
/* clean possible allocated buffer */
free(t->rsp_concat_buf.data);
memset(&t->rsp_concat_buf, 0, sizeof(sdp_buf_t));
if (!t->reqbuf) {
t->reqbuf = malloc(SDP_REQ_BUFFER_SIZE);
if (!t->reqbuf) {
t->err = ENOMEM;
goto end;
}
}
memset(t->reqbuf, 0, SDP_REQ_BUFFER_SIZE);
reqhdr = (sdp_pdu_hdr_t *) t->reqbuf;
reqhdr->tid = htons(sdp_gen_tid(session));
reqhdr->pdu_id = SDP_SVC_SEARCH_ATTR_REQ;
/* generate PDU */
pdata = t->reqbuf + sizeof(sdp_pdu_hdr_t);
t->reqsize = sizeof(sdp_pdu_hdr_t);
/* add service class IDs for search */
seqlen = gen_searchseq_pdu(pdata, search);
if (seqlen < 0) {
t->err = EINVAL;
goto end;
}
SDPDBG("Data seq added : %d", seqlen);
/* now set the length and increment the pointer */
t->reqsize += seqlen;
pdata += seqlen;
bt_put_be16(SDP_MAX_ATTR_LEN, pdata);
t->reqsize += sizeof(uint16_t);
pdata += sizeof(uint16_t);
SDPDBG("Max attr byte count : %d", SDP_MAX_ATTR_LEN);
/* get attr seq PDU form */
seqlen = gen_attridseq_pdu(pdata, attrid_list,
reqtype == SDP_ATTR_REQ_INDIVIDUAL ? SDP_UINT16 : SDP_UINT32);
if (seqlen < 0) {
t->err = EINVAL;
goto end;
}
pdata += seqlen;
SDPDBG("Attr list length : %d", seqlen);
t->reqsize += seqlen;
/* set the request header's param length */
cstate_len = copy_cstate(pdata, SDP_REQ_BUFFER_SIZE - t->reqsize, NULL);
reqhdr->plen = htons((t->reqsize + cstate_len) - sizeof(sdp_pdu_hdr_t));
if (sdp_send_req(session, t->reqbuf, t->reqsize + cstate_len) < 0) {
SDPERR("Error sending data:%m");
t->err = errno;
goto end;
}
return 0;
end:
free(t->reqbuf);
t->reqbuf = NULL;
return -1;
}
/*
* Function used to get the error reason after sdp_callback_t function has been called
* and the status is 0xffff or if sdp_service_{search, attr, search_attr}_async returns -1.
* It indicates that an error NOT related to SDP_ErrorResponse happened. Get errno directly
* is not safe because multiple transactions can be triggered.
* This function must be used with asynchronous sdp functions only.
*
* INPUT:
* sdp_session_t *session
* Current sdp session to be handled
* RETURN:
* 0 = No error in the current transaction
* -1 - if the session is invalid
* positive value - the errno value
*
*/
int sdp_get_error(sdp_session_t *session)
{
struct sdp_transaction *t;
if (!session || !session->priv) {
SDPERR("Invalid session");
return -1;
}
t = session->priv;
return t->err;
}
/*
* Receive the incoming SDP PDU. This function must be called when there is data
* available to be read. On continuation state, the original request (with a new
* transaction ID) and the continuation state data will be appended in the initial PDU.
* If an error happens or the transaction finishes the callback function will be called.
*
* INPUT:
* sdp_session_t *session
* Current sdp session to be handled
* RETURN:
* 0 - if the transaction is on continuation state
* -1 - On any failure or the transaction finished
*/
int sdp_process(sdp_session_t *session)
{
struct sdp_transaction *t;
sdp_pdu_hdr_t *reqhdr, *rsphdr;
sdp_cstate_t *pcstate;
uint8_t *pdata, *rspbuf, *targetPtr;
int rsp_count, err = -1;
size_t size = 0;
int n, plen;
uint16_t status = 0xffff;
uint8_t pdu_id = 0x00;
if (!session || !session->priv) {
SDPERR("Invalid session");
return -1;
}
rspbuf = bt_malloc0(SDP_RSP_BUFFER_SIZE);
if (!rspbuf) {
SDPERR("Response buffer alloc failure:%m (%d)", errno);
return -1;
}
t = session->priv;
reqhdr = (sdp_pdu_hdr_t *)t->reqbuf;
rsphdr = (sdp_pdu_hdr_t *)rspbuf;
pdata = rspbuf + sizeof(sdp_pdu_hdr_t);
n = sdp_read_rsp(session, rspbuf, SDP_RSP_BUFFER_SIZE);
if (n < 0) {
SDPERR("Read response:%m (%d)", errno);
t->err = errno;
goto end;
}
if (reqhdr->tid != rsphdr->tid) {
t->err = EPROTO;
SDPERR("Protocol error: transaction id does not match");
goto end;
}
if (n != (int) (ntohs(rsphdr->plen) + sizeof(sdp_pdu_hdr_t))) {
t->err = EPROTO;
SDPERR("Protocol error: invalid length");
goto end;
}
pdu_id = rsphdr->pdu_id;
switch (rsphdr->pdu_id) {
uint8_t *ssr_pdata;
uint16_t tsrc, csrc;
case SDP_SVC_SEARCH_RSP:
/*
* TSRC: Total Service Record Count (2 bytes)
* CSRC: Current Service Record Count (2 bytes)
*/
ssr_pdata = pdata;
tsrc = bt_get_be16(ssr_pdata);
ssr_pdata += sizeof(uint16_t);
csrc = bt_get_be16(ssr_pdata);
/* csrc should never be larger than tsrc */
if (csrc > tsrc) {
t->err = EPROTO;
SDPERR("Protocol error: wrong current service record count value.");
goto end;
}
SDPDBG("Total svc count: %d", tsrc);
SDPDBG("Current svc count: %d", csrc);
/* parameter length without continuation state */
plen = sizeof(tsrc) + sizeof(csrc) + csrc * 4;
if (t->rsp_concat_buf.data_size == 0) {
/* first fragment */
rsp_count = sizeof(tsrc) + sizeof(csrc) + csrc * 4;
} else if (t->rsp_concat_buf.data_size >= sizeof(uint16_t) * 2) {
/* point to the first csrc */
uint8_t *pcsrc = t->rsp_concat_buf.data + 2;
uint16_t tcsrc, tcsrc2;
/* FIXME: update the interface later. csrc doesn't need be passed to clients */
pdata += sizeof(uint16_t); /* point to csrc */
/* the first csrc contains the sum of partial csrc responses */
memcpy(&tcsrc, pcsrc, sizeof(tcsrc));
memcpy(&tcsrc2, pdata, sizeof(tcsrc2));
tcsrc += tcsrc2;
memcpy(pcsrc, &tcsrc, sizeof(tcsrc));
pdata += sizeof(uint16_t); /* point to the first handle */
rsp_count = csrc * 4;
} else {
t->err = EPROTO;
SDPERR("Protocol error: invalid PDU size");
status = SDP_INVALID_PDU_SIZE;
goto end;
}
status = 0x0000;
break;
case SDP_SVC_ATTR_RSP:
case SDP_SVC_SEARCH_ATTR_RSP:
rsp_count = bt_get_be16(pdata);
SDPDBG("Attrlist byte count : %d", rsp_count);
/* Valid range for rsp_count is 0x0002-0xFFFF */
if (t->rsp_concat_buf.data_size == 0 && rsp_count < 0x0002) {
t->err = EPROTO;
SDPERR("Protocol error: invalid AttrList size");
status = SDP_INVALID_PDU_SIZE;
goto end;
}
/*
* Number of bytes in the AttributeLists parameter(without
* continuation state) + AttributeListsByteCount field size.
*/
plen = sizeof(uint16_t) + rsp_count;
pdata += sizeof(uint16_t); /* points to attribute list */
status = 0x0000;
break;
case SDP_ERROR_RSP:
status = bt_get_be16(pdata);
size = ntohs(rsphdr->plen);
goto end;
default:
t->err = EPROTO;
SDPERR("Illegal PDU ID: 0x%x", rsphdr->pdu_id);
goto end;
}
/* Out of bound check before using rsp_count as offset for
* continuation state, which has at least a one byte size
* field.
*/
if ((n - (int) sizeof(sdp_pdu_hdr_t)) < plen + 1) {
t->err = EPROTO;
SDPERR("Protocol error: invalid PDU size");
status = SDP_INVALID_PDU_SIZE;
goto end;
}
pcstate = (sdp_cstate_t *) (pdata + rsp_count);
SDPDBG("Cstate length : %d", pcstate->length);
/*
* Check out of bound. Continuation state must have at least
* 1 byte: ZERO to indicate that it is not a partial response.
*/
if ((n - (int) sizeof(sdp_pdu_hdr_t)) != (plen + pcstate->length + 1)) {
t->err = EPROTO;
SDPERR("Protocol error: wrong PDU size.");
status = 0xffff;
goto end;
}
/*
* This is a split response, need to concatenate intermediate
* responses and the last one which will have cstate length == 0
*/
t->rsp_concat_buf.data = realloc(t->rsp_concat_buf.data, t->rsp_concat_buf.data_size + rsp_count);
targetPtr = t->rsp_concat_buf.data + t->rsp_concat_buf.data_size;
t->rsp_concat_buf.buf_size = t->rsp_concat_buf.data_size + rsp_count;
memcpy(targetPtr, pdata, rsp_count);
t->rsp_concat_buf.data_size += rsp_count;
if (pcstate->length > 0) {
int reqsize, cstate_len;
reqhdr->tid = htons(sdp_gen_tid(session));
/* add continuation state */
cstate_len = copy_cstate(t->reqbuf + t->reqsize,
SDP_REQ_BUFFER_SIZE - t->reqsize, pcstate);
reqsize = t->reqsize + cstate_len;
/* set the request header's param length */
reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t));
if (sdp_send_req(session, t->reqbuf, reqsize) < 0) {
SDPERR("Error sending data:%m(%d)", errno);
status = 0xffff;
t->err = errno;
goto end;
}
err = 0;
}
end:
if (err) {
if (t->rsp_concat_buf.data_size != 0) {
pdata = t->rsp_concat_buf.data;
size = t->rsp_concat_buf.data_size;
}
if (t->cb)
t->cb(pdu_id, status, pdata, size, t->udata);
}
free(rspbuf);
return err;
}
/*
* This is a service search request combined with the service
* attribute request. First a service class match is done and
* for matching service, requested attributes are extracted
*
* INPUT :
*
* sdp_list_t *search
* Singly linked list containing elements of the search
* pattern. Each entry in the list is a UUID(DataTypeSDP_UUID16)
* of the service to be searched
*
* AttributeSpecification attrSpec
* Attribute identifiers are 16 bit unsigned integers specified
* in one of 2 ways described below :
* SDP_ATTR_REQ_INDIVIDUAL - 16bit individual identifiers
* They are the actual attribute identifiers in ascending order
*
* SDP_ATTR_REQ_RANGE - 32bit identifier range
* The high-order 16bits is the start of range
* the low-order 16bits are the end of range
* 0x0000 to 0xFFFF gets all attributes
*
* sdp_list_t *attrids
* Singly linked list containing attribute identifiers desired.
* Every element is either a uint16_t(attrSpec = SDP_ATTR_REQ_INDIVIDUAL)
* or a uint32_t(attrSpec=SDP_ATTR_REQ_RANGE)
*
* OUTPUT :
* int return value
* 0:
* The request completed successfully. This does not
* mean the requested services were found
* -1:
* On any error and sets errno
*
* sdp_list_t **rsp
* This variable is set on a successful return to point to
* service(s) found. Each element of this list is of type
* sdp_record_t* (of the services which matched the search list)
*/
int sdp_service_search_attr_req(sdp_session_t *session, const sdp_list_t *search, sdp_attrreq_type_t reqtype, const sdp_list_t *attrids, sdp_list_t **rsp)
{
int status = 0;
uint32_t reqsize = 0, _reqsize;
uint32_t rspsize = 0;
int seqlen = 0, attr_list_len = 0;
int rsp_count = 0, cstate_len = 0;
unsigned int pdata_len;
uint8_t *pdata, *_pdata;
uint8_t *reqbuf, *rspbuf;
sdp_pdu_hdr_t *reqhdr, *rsphdr;
uint8_t dataType;
sdp_list_t *rec_list = NULL;
sdp_buf_t rsp_concat_buf;
sdp_cstate_t *cstate = NULL;
if (reqtype != SDP_ATTR_REQ_INDIVIDUAL && reqtype != SDP_ATTR_REQ_RANGE) {
errno = EINVAL;
return -1;
}
memset(&rsp_concat_buf, 0, sizeof(sdp_buf_t));
reqbuf = malloc(SDP_REQ_BUFFER_SIZE);
rspbuf = malloc(SDP_RSP_BUFFER_SIZE);
if (!reqbuf || !rspbuf) {
errno = ENOMEM;
status = -1;
goto end;
}
reqhdr = (sdp_pdu_hdr_t *) reqbuf;
reqhdr->pdu_id = SDP_SVC_SEARCH_ATTR_REQ;
/* generate PDU */
pdata = reqbuf + sizeof(sdp_pdu_hdr_t);
reqsize = sizeof(sdp_pdu_hdr_t);
/* add service class IDs for search */
seqlen = gen_searchseq_pdu(pdata, search);
if (seqlen < 0) {
errno = EINVAL;
status = -1;
goto end;
}
SDPDBG("Data seq added : %d", seqlen);
/* now set the length and increment the pointer */
reqsize += seqlen;
pdata += seqlen;
bt_put_be16(SDP_MAX_ATTR_LEN, pdata);
reqsize += sizeof(uint16_t);
pdata += sizeof(uint16_t);
SDPDBG("Max attr byte count : %d", SDP_MAX_ATTR_LEN);
/* get attr seq PDU form */
seqlen = gen_attridseq_pdu(pdata, attrids,
reqtype == SDP_ATTR_REQ_INDIVIDUAL ? SDP_UINT16 : SDP_UINT32);
if (seqlen < 0) {
errno = EINVAL;
status = -1;
goto end;
}
pdata += seqlen;
SDPDBG("Attr list length : %d", seqlen);
reqsize += seqlen;
*rsp = 0;
/* save before Continuation State */
_pdata = pdata;
_reqsize = reqsize;
do {
reqhdr->tid = htons(sdp_gen_tid(session));
/* add continuation state (can be null) */
reqsize = _reqsize + copy_cstate(_pdata,
SDP_REQ_BUFFER_SIZE - _reqsize, cstate);
/* set the request header's param length */
reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t));
rsphdr = (sdp_pdu_hdr_t *) rspbuf;
status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize);
if (rspsize < sizeof(sdp_pdu_hdr_t)) {
SDPERR("Unexpected end of packet");
status = -1;
goto end;
}
if (status < 0) {
SDPDBG("Status : 0x%x", rsphdr->pdu_id);
goto end;
}
if (rsphdr->pdu_id == SDP_ERROR_RSP) {
status = -1;
goto end;
}
pdata = rspbuf + sizeof(sdp_pdu_hdr_t);
pdata_len = rspsize - sizeof(sdp_pdu_hdr_t);
if (pdata_len < sizeof(uint16_t)) {
SDPERR("Unexpected end of packet");
status = -1;
goto end;
}
rsp_count = bt_get_be16(pdata);
attr_list_len += rsp_count;
pdata += sizeof(uint16_t); /* pdata points to attribute list */
pdata_len -= sizeof(uint16_t);
if (pdata_len < rsp_count + sizeof(uint8_t)) {
SDPERR("Unexpected end of packet: continuation state data missing");
status = -1;
goto end;
}
cstate_len = *(uint8_t *) (pdata + rsp_count);
SDPDBG("Attrlist byte count : %d", attr_list_len);
SDPDBG("Response byte count : %d", rsp_count);
SDPDBG("Cstate length : %d", cstate_len);
/*
* This is a split response, need to concatenate intermediate
* responses and the last one which will have cstate_len == 0
*/
if (cstate_len > 0 || rsp_concat_buf.data_size != 0) {
uint8_t *targetPtr = NULL;
cstate = cstate_len > 0 ? (sdp_cstate_t *) (pdata + rsp_count) : 0;
/* build concatenated response buffer */
rsp_concat_buf.data = realloc(rsp_concat_buf.data, rsp_concat_buf.data_size + rsp_count);
targetPtr = rsp_concat_buf.data + rsp_concat_buf.data_size;
rsp_concat_buf.buf_size = rsp_concat_buf.data_size + rsp_count;
memcpy(targetPtr, pdata, rsp_count);
rsp_concat_buf.data_size += rsp_count;
}
} while (cstate);
if (attr_list_len > 0) {
int scanned = 0;
if (rsp_concat_buf.data_size != 0) {
pdata = rsp_concat_buf.data;
pdata_len = rsp_concat_buf.data_size;
}
/*
* Response is a sequence of sequence(s) for one or
* more data element sequence(s) representing services
* for which attributes are returned
*/
scanned = sdp_extract_seqtype(pdata, pdata_len, &dataType, &seqlen);
SDPDBG("Bytes scanned : %d", scanned);
SDPDBG("Seq length : %d", seqlen);
if (scanned && seqlen) {
pdata += scanned;
pdata_len -= scanned;
do {
int recsize = 0;
sdp_record_t *rec = sdp_extract_pdu(pdata, pdata_len, &recsize);
if (rec == NULL) {
SDPERR("SVC REC is null");
status = -1;
goto end;
}
if (!recsize) {
sdp_record_free(rec);
break;
}
scanned += recsize;
pdata += recsize;
pdata_len -= recsize;
SDPDBG("Loc seq length : %d", recsize);
SDPDBG("Svc Rec Handle : 0x%x", rec->handle);
SDPDBG("Bytes scanned : %d", scanned);
SDPDBG("Attrlist byte count : %d", attr_list_len);
rec_list = sdp_list_append(rec_list, rec);
} while (scanned < attr_list_len && pdata_len > 0);
SDPDBG("Successful scan of service attr lists");
*rsp = rec_list;
}
}
end:
free(rsp_concat_buf.data);
free(reqbuf);
free(rspbuf);
return status;
}
/*
* Find devices in the piconet.
*/
int sdp_general_inquiry(inquiry_info *ii, int num_dev, int duration, uint8_t *found)
{
int n = hci_inquiry(-1, 10, num_dev, NULL, &ii, 0);
if (n < 0) {
SDPERR("Inquiry failed:%m");
return -1;
}
*found = n;
return 0;
}
int sdp_close(sdp_session_t *session)
{
struct sdp_transaction *t;
int ret;
if (!session)
return -1;
ret = close(session->sock);
t = session->priv;
if (t) {
free(t->reqbuf);
free(t->rsp_concat_buf.data);
free(t);
}
free(session);
return ret;
}
static inline int sdp_is_local(const bdaddr_t *device)
{
return memcmp(device, BDADDR_LOCAL, sizeof(bdaddr_t)) == 0;
}
static int sdp_connect_local(sdp_session_t *session)
{
struct sockaddr_un sa;
session->sock = socket(PF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (session->sock < 0)
return -1;
session->local = 1;
sa.sun_family = AF_UNIX;
strcpy(sa.sun_path, SDP_UNIX_PATH);
return connect(session->sock, (struct sockaddr *) &sa, sizeof(sa));
}
static int set_l2cap_mtu(int sk, uint16_t mtu)
{
struct l2cap_options l2o;
socklen_t len;
memset(&l2o, 0, sizeof(l2o));
len = sizeof(l2o);
if (getsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &l2o, &len) < 0)
return -1;
l2o.imtu = mtu;
l2o.omtu = mtu;
if (setsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &l2o, sizeof(l2o)) < 0)
return -1;
return 0;
}
static int sdp_connect_l2cap(const bdaddr_t *src,
const bdaddr_t *dst, sdp_session_t *session)
{
uint32_t flags = session->flags;
struct sockaddr_l2 sa;
int sk;
int sockflags = SOCK_SEQPACKET | SOCK_CLOEXEC;
if (flags & SDP_NON_BLOCKING)
sockflags |= SOCK_NONBLOCK;
session->sock = socket(PF_BLUETOOTH, sockflags, BTPROTO_L2CAP);
if (session->sock < 0)
return -1;
session->local = 0;
sk = session->sock;
memset(&sa, 0, sizeof(sa));
sa.l2_family = AF_BLUETOOTH;
sa.l2_psm = 0;
if (bacmp(src, BDADDR_ANY)) {
sa.l2_bdaddr = *src;
if (bind(sk, (struct sockaddr *) &sa, sizeof(sa)) < 0)
return -1;
}
if (flags & SDP_WAIT_ON_CLOSE) {
struct linger l = { .l_onoff = 1, .l_linger = 1 };
if (setsockopt(sk, SOL_SOCKET, SO_LINGER, &l, sizeof(l)) < 0)
return -1;
}
if ((flags & SDP_LARGE_MTU) &&
set_l2cap_mtu(sk, SDP_LARGE_L2CAP_MTU) < 0)
return -1;
sa.l2_psm = htobs(SDP_PSM);
sa.l2_bdaddr = *dst;
do {
int ret = connect(sk, (struct sockaddr *) &sa, sizeof(sa));
if (!ret)
return 0;
if (ret < 0 && (flags & SDP_NON_BLOCKING) &&
(errno == EAGAIN || errno == EINPROGRESS))
return 0;
} while (errno == EBUSY && (flags & SDP_RETRY_IF_BUSY));
return -1;
}
sdp_session_t *sdp_connect(const bdaddr_t *src,
const bdaddr_t *dst, uint32_t flags)
{
sdp_session_t *session;
int err;
if ((flags & SDP_RETRY_IF_BUSY) && (flags & SDP_NON_BLOCKING)) {
errno = EINVAL;
return NULL;
}
session = sdp_create(-1, flags);
if (!session)
return NULL;
if (sdp_is_local(dst)) {
if (sdp_connect_local(session) < 0)
goto fail;
} else {
if (sdp_connect_l2cap(src, dst, session) < 0)
goto fail;
}
return session;
fail:
err = errno;
if (session->sock >= 0)
close(session->sock);
free(session->priv);
free(session);
errno = err;
return NULL;
}
int sdp_get_socket(const sdp_session_t *session)
{
return session->sock;
}
uint16_t sdp_gen_tid(sdp_session_t *session)
{
return session->tid++;
}
/*
* Set the supported features
*/
int sdp_set_supp_feat(sdp_record_t *rec, const sdp_list_t *sf)
{
const sdp_list_t *p, *r;
sdp_data_t *feat, *seq_feat;
int seqlen, i;
void **seqDTDs, **seqVals;
seqlen = sdp_list_len(sf);
seqDTDs = malloc(seqlen * sizeof(void *));
if (!seqDTDs)
return -1;
seqVals = malloc(seqlen * sizeof(void *));
if (!seqVals) {
free(seqDTDs);
return -1;
}
for (p = sf, i = 0; p; p = p->next, i++) {
int plen, j;
void **dtds, **vals;
int *lengths;
plen = sdp_list_len(p->data);
dtds = malloc(plen * sizeof(void *));
if (!dtds)
goto fail;
vals = malloc(plen * sizeof(void *));
if (!vals) {
free(dtds);
goto fail;
}
lengths = malloc(plen * sizeof(int));
if (!lengths) {
free(dtds);
free(vals);
goto fail;
}
for (r = p->data, j = 0; r; r = r->next, j++) {
sdp_data_t *data = (sdp_data_t *) r->data;
dtds[j] = &data->dtd;
switch (data->dtd) {
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
vals[j] = data->val.str;
lengths[j] = data->unitSize - sizeof(uint8_t);
break;
case SDP_ALT8:
case SDP_ALT16:
case SDP_ALT32:
case SDP_SEQ8:
case SDP_SEQ16:
case SDP_SEQ32:
vals[j] = data->val.dataseq;
lengths[j] = 0;
break;
default:
vals[j] = &data->val;
lengths[j] = 0;
break;
}
}
feat = sdp_seq_alloc_with_length(dtds, vals, lengths, plen);
free(dtds);
free(vals);
free(lengths);
if (!feat)
goto fail;
seqDTDs[i] = &feat->dtd;
seqVals[i] = feat;
}
seq_feat = sdp_seq_alloc(seqDTDs, seqVals, seqlen);
if (!seq_feat)
goto fail;
sdp_attr_replace(rec, SDP_ATTR_SUPPORTED_FEATURES_LIST, seq_feat);
free(seqVals);
free(seqDTDs);
return 0;
fail:
free(seqVals);
free(seqDTDs);
return -1;
}
/*
* Get the supported features
* If an error occurred -1 is returned and errno is set
*/
int sdp_get_supp_feat(const sdp_record_t *rec, sdp_list_t **seqp)
{
sdp_data_t *sdpdata, *d;
sdp_list_t *tseq;
tseq = NULL;
sdpdata = sdp_data_get(rec, SDP_ATTR_SUPPORTED_FEATURES_LIST);
if (!sdpdata || !SDP_IS_SEQ(sdpdata->dtd))
return sdp_get_uuidseq_attr(rec,
SDP_ATTR_SUPPORTED_FEATURES_LIST, seqp);
for (d = sdpdata->val.dataseq; d; d = d->next) {
sdp_data_t *dd;
sdp_list_t *subseq;
if (!SDP_IS_SEQ(d->dtd))
goto fail;
subseq = NULL;
for (dd = d->val.dataseq; dd; dd = dd->next) {
sdp_data_t *data;
void *val;
int length;
switch (dd->dtd) {
case SDP_URL_STR8:
case SDP_URL_STR16:
case SDP_TEXT_STR8:
case SDP_TEXT_STR16:
val = dd->val.str;
length = dd->unitSize - sizeof(uint8_t);
break;
case SDP_UINT8:
case SDP_UINT16:
val = &dd->val;
length = 0;
break;
default:
sdp_list_free(subseq, free);
goto fail;
}
data = sdp_data_alloc_with_length(dd->dtd, val, length);
if (data)
subseq = sdp_list_append(subseq, data);
}
tseq = sdp_list_append(tseq, subseq);
}
*seqp = tseq;
return 0;
fail:
while (tseq) {
sdp_list_t * next;
next = tseq->next;
sdp_list_free(tseq, free);
tseq = next;
}
errno = EINVAL;
return -1;
}
void sdp_add_lang_attr(sdp_record_t *rec)
{
sdp_lang_attr_t base_lang;
sdp_list_t *langs;
base_lang.code_ISO639 = (0x65 << 8) | 0x6e;
base_lang.encoding = 106;
base_lang.base_offset = SDP_PRIMARY_LANG_BASE;
langs = sdp_list_append(0, &base_lang);
sdp_set_lang_attr(rec, langs);
sdp_list_free(langs, NULL);
}
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