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/*
*
* 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>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <assert.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/sdp.h>
#include <bluetooth/sdp_lib.h>
#include <netinet/in.h>
#include <glib.h>
#include <dbus/dbus.h>
#include "sdpd.h"
#include "log.h"
#include "adapter.h"
#include "manager.h"
static sdp_record_t *server = NULL;
/*
* List of version numbers supported by the SDP server.
* Add to this list when newer versions are supported.
*/
static sdp_version_t sdpVnumArray[1] = {
{ 1, 0 }
};
static const int sdpServerVnumEntries = 1;
/*
* A simple function which returns the time of day in
* seconds. Used for updating the service db state
* attribute of the service record of the SDP server
*/
uint32_t sdp_get_time(void)
{
/*
* To handle failure in gettimeofday, so an old
* value is returned and service does not fail
*/
static struct timeval tm;
gettimeofday(&tm, NULL);
return (uint32_t) tm.tv_sec;
}
/*
* The service database state is an attribute of the service record
* of the SDP server itself. This attribute is guaranteed to
* change if any of the contents of the service repository
* changes. This function updates the timestamp of value of
* the svcDBState attribute
* Set the SDP server DB. Simply a timestamp which is the marker
* when the DB was modified.
*/
static void update_db_timestamp(void)
{
uint32_t dbts = sdp_get_time();
sdp_data_t *d = sdp_data_alloc(SDP_UINT32, &dbts);
sdp_attr_replace(server, SDP_ATTR_SVCDB_STATE, d);
}
void register_public_browse_group(void)
{
sdp_list_t *browselist;
uuid_t bgscid, pbgid;
sdp_data_t *sdpdata;
sdp_record_t *browse = sdp_record_alloc();
browse->handle = SDP_SERVER_RECORD_HANDLE + 1;
sdp_record_add(BDADDR_ANY, browse);
sdpdata = sdp_data_alloc(SDP_UINT32, &browse->handle);
sdp_attr_add(browse, SDP_ATTR_RECORD_HANDLE, sdpdata);
sdp_uuid16_create(&bgscid, BROWSE_GRP_DESC_SVCLASS_ID);
browselist = sdp_list_append(0, &bgscid);
sdp_set_service_classes(browse, browselist);
sdp_list_free(browselist, 0);
sdp_uuid16_create(&pbgid, PUBLIC_BROWSE_GROUP);
sdp_attr_add_new(browse, SDP_ATTR_GROUP_ID,
SDP_UUID16, &pbgid.value.uuid16);
}
/*
* The SDP server must present its own service record to
* the service repository. This can be accessed by service
* discovery clients. This method constructs a service record
* and stores it in the repository
*/
void register_server_service(void)
{
sdp_list_t *classIDList;
uuid_t classID;
void **versions, **versionDTDs;
uint8_t dtd;
sdp_data_t *pData;
int i;
server = sdp_record_alloc();
server->pattern = NULL;
/* Force the record to be SDP_SERVER_RECORD_HANDLE */
server->handle = SDP_SERVER_RECORD_HANDLE;
sdp_record_add(BDADDR_ANY, server);
sdp_attr_add(server, SDP_ATTR_RECORD_HANDLE,
sdp_data_alloc(SDP_UINT32, &server->handle));
sdp_uuid16_create(&classID, SDP_SERVER_SVCLASS_ID);
classIDList = sdp_list_append(0, &classID);
sdp_set_service_classes(server, classIDList);
sdp_list_free(classIDList, 0);
/*
* Set the version numbers supported, these are passed as arguments
* to the server on command line. Now defaults to 1.0
* Build the version number sequence first
*/
versions = malloc(sdpServerVnumEntries * sizeof(void *));
versionDTDs = malloc(sdpServerVnumEntries * sizeof(void *));
dtd = SDP_UINT16;
for (i = 0; i < sdpServerVnumEntries; i++) {
uint16_t *version = malloc(sizeof(uint16_t));
*version = sdpVnumArray[i].major;
*version = (*version << 8);
*version |= sdpVnumArray[i].minor;
versions[i] = version;
versionDTDs[i] = &dtd;
}
pData = sdp_seq_alloc(versionDTDs, versions, sdpServerVnumEntries);
for (i = 0; i < sdpServerVnumEntries; i++)
free(versions[i]);
free(versions);
free(versionDTDs);
sdp_attr_add(server, SDP_ATTR_VERSION_NUM_LIST, pData);
update_db_timestamp();
}
void register_device_id(const uint16_t vendor, const uint16_t product,
const uint16_t version)
{
const uint16_t spec = 0x0102, source = 0x0002;
const uint8_t primary = 1;
sdp_list_t *class_list, *group_list, *profile_list;
uuid_t class_uuid, group_uuid;
sdp_data_t *sdp_data, *primary_data, *source_data;
sdp_data_t *spec_data, *vendor_data, *product_data, *version_data;
sdp_profile_desc_t profile;
sdp_record_t *record = sdp_record_alloc();
info("Adding device id record for %04x:%04x", vendor, product);
btd_manager_set_did(vendor, product, version);
record->handle = sdp_next_handle();
sdp_record_add(BDADDR_ANY, record);
sdp_data = sdp_data_alloc(SDP_UINT32, &record->handle);
sdp_attr_add(record, SDP_ATTR_RECORD_HANDLE, sdp_data);
sdp_uuid16_create(&class_uuid, PNP_INFO_SVCLASS_ID);
class_list = sdp_list_append(0, &class_uuid);
sdp_set_service_classes(record, class_list);
sdp_list_free(class_list, NULL);
sdp_uuid16_create(&group_uuid, PUBLIC_BROWSE_GROUP);
group_list = sdp_list_append(NULL, &group_uuid);
sdp_set_browse_groups(record, group_list);
sdp_list_free(group_list, NULL);
sdp_uuid16_create(&profile.uuid, PNP_INFO_PROFILE_ID);
profile.version = spec;
profile_list = sdp_list_append(NULL, &profile);
sdp_set_profile_descs(record, profile_list);
sdp_list_free(profile_list, NULL);
spec_data = sdp_data_alloc(SDP_UINT16, &spec);
sdp_attr_add(record, 0x0200, spec_data);
vendor_data = sdp_data_alloc(SDP_UINT16, &vendor);
sdp_attr_add(record, 0x0201, vendor_data);
product_data = sdp_data_alloc(SDP_UINT16, &product);
sdp_attr_add(record, 0x0202, product_data);
version_data = sdp_data_alloc(SDP_UINT16, &version);
sdp_attr_add(record, 0x0203, version_data);
primary_data = sdp_data_alloc(SDP_BOOL, &primary);
sdp_attr_add(record, 0x0204, primary_data);
source_data = sdp_data_alloc(SDP_UINT16, &source);
sdp_attr_add(record, 0x0205, source_data);
update_db_timestamp();
}
int add_record_to_server(const bdaddr_t *src, sdp_record_t *rec)
{
sdp_data_t *data;
sdp_list_t *pattern;
if (rec->handle == 0xffffffff) {
rec->handle = sdp_next_handle();
if (rec->handle < 0x10000)
return -ENOSPC;
} else {
if (sdp_record_find(rec->handle))
return -EEXIST;
}
DBG("Adding record with handle 0x%05x", rec->handle);
sdp_record_add(src, rec);
data = sdp_data_alloc(SDP_UINT32, &rec->handle);
sdp_attr_replace(rec, SDP_ATTR_RECORD_HANDLE, data);
if (sdp_data_get(rec, SDP_ATTR_BROWSE_GRP_LIST) == NULL) {
uuid_t uuid;
sdp_uuid16_create(&uuid, PUBLIC_BROWSE_GROUP);
sdp_pattern_add_uuid(rec, &uuid);
}
for (pattern = rec->pattern; pattern; pattern = pattern->next) {
char uuid[32];
if (pattern->data == NULL)
continue;
sdp_uuid2strn((uuid_t *) pattern->data, uuid, sizeof(uuid));
DBG("Record pattern UUID %s", uuid);
}
update_db_timestamp();
return 0;
}
int remove_record_from_server(uint32_t handle)
{
sdp_record_t *rec;
DBG("Removing record with handle 0x%05x", handle);
rec = sdp_record_find(handle);
if (!rec)
return -ENOENT;
if (sdp_record_remove(handle) == 0)
update_db_timestamp();
sdp_record_free(rec);
return 0;
}
/* FIXME: refactor for server-side */
static sdp_record_t *extract_pdu_server(bdaddr_t *device, uint8_t *p,
unsigned int bufsize,
uint32_t handleExpected, int *scanned)
{
int extractStatus = -1, localExtractedLength = 0;
uint8_t dtd;
int seqlen = 0;
sdp_record_t *rec = NULL;
uint16_t attrId, lookAheadAttrId;
sdp_data_t *pAttr = NULL;
uint32_t handle = 0xffffffff;
*scanned = sdp_extract_seqtype(p, bufsize, &dtd, &seqlen);
p += *scanned;
bufsize -= *scanned;
if (bufsize < sizeof(uint8_t) + sizeof(uint8_t)) {
SDPDBG("Unexpected end of packet");
return NULL;
}
lookAheadAttrId = ntohs(bt_get_unaligned((uint16_t *) (p + sizeof(uint8_t))));
SDPDBG("Look ahead attr id : %d", lookAheadAttrId);
if (lookAheadAttrId == SDP_ATTR_RECORD_HANDLE) {
if (bufsize < (sizeof(uint8_t) * 2) +
sizeof(uint16_t) + sizeof(uint32_t)) {
SDPDBG("Unexpected end of packet");
return NULL;
}
handle = ntohl(bt_get_unaligned((uint32_t *) (p +
sizeof(uint8_t) + sizeof(uint16_t) +
sizeof(uint8_t))));
SDPDBG("SvcRecHandle : 0x%x", handle);
rec = sdp_record_find(handle);
} else if (handleExpected != 0xffffffff)
rec = sdp_record_find(handleExpected);
if (!rec) {
rec = sdp_record_alloc();
rec->attrlist = NULL;
if (lookAheadAttrId == SDP_ATTR_RECORD_HANDLE) {
rec->handle = handle;
sdp_record_add(device, rec);
} else if (handleExpected != 0xffffffff) {
rec->handle = handleExpected;
sdp_record_add(device, rec);
}
} else {
sdp_list_free(rec->attrlist, (sdp_free_func_t) sdp_data_free);
rec->attrlist = NULL;
}
while (localExtractedLength < seqlen) {
int attrSize = sizeof(uint8_t);
int attrValueLength = 0;
if (bufsize < attrSize + sizeof(uint16_t)) {
SDPDBG("Unexpected end of packet: Terminating extraction of attributes");
break;
}
SDPDBG("Extract PDU, sequenceLength: %d localExtractedLength: %d",
seqlen, localExtractedLength);
dtd = *(uint8_t *) p;
attrId = ntohs(bt_get_unaligned((uint16_t *) (p + attrSize)));
attrSize += sizeof(uint16_t);
SDPDBG("DTD of attrId : %d Attr id : 0x%x", dtd, attrId);
pAttr = sdp_extract_attr(p + attrSize, bufsize - attrSize,
&attrValueLength, rec);
SDPDBG("Attr id : 0x%x attrValueLength : %d", attrId, attrValueLength);
attrSize += attrValueLength;
if (pAttr == NULL) {
SDPDBG("Terminating extraction of attributes");
break;
}
localExtractedLength += attrSize;
p += attrSize;
bufsize -= attrSize;
sdp_attr_replace(rec, attrId, pAttr);
extractStatus = 0;
SDPDBG("Extract PDU, seqLength: %d localExtractedLength: %d",
seqlen, localExtractedLength);
}
if (extractStatus == 0) {
SDPDBG("Successful extracting of Svc Rec attributes");
#ifdef SDP_DEBUG
sdp_print_service_attr(rec->attrlist);
#endif
*scanned += seqlen;
}
return rec;
}
/*
* Add the newly created service record to the service repository
*/
int service_register_req(sdp_req_t *req, sdp_buf_t *rsp)
{
int scanned = 0;
sdp_data_t *handle;
uint8_t *p = req->buf + sizeof(sdp_pdu_hdr_t);
int bufsize = req->len - sizeof(sdp_pdu_hdr_t);
sdp_record_t *rec;
req->flags = *p++;
if (req->flags & SDP_DEVICE_RECORD) {
bacpy(&req->device, (bdaddr_t *) p);
p += sizeof(bdaddr_t);
bufsize -= sizeof(bdaddr_t);
}
/* save image of PDU: we need it when clients request this attribute */
rec = extract_pdu_server(&req->device, p, bufsize, 0xffffffff, &scanned);
if (!rec)
goto invalid;
if (rec->handle == 0xffffffff) {
rec->handle = sdp_next_handle();
if (rec->handle < 0x10000) {
sdp_record_free(rec);
goto invalid;
}
} else {
if (sdp_record_find(rec->handle)) {
/* extract_pdu_server will add the record handle
* if it is missing. So instead of failing, skip
* the record adding to avoid duplication. */
goto success;
}
}
sdp_record_add(&req->device, rec);
if (!(req->flags & SDP_RECORD_PERSIST))
sdp_svcdb_set_collectable(rec, req->sock);
handle = sdp_data_alloc(SDP_UINT32, &rec->handle);
sdp_attr_replace(rec, SDP_ATTR_RECORD_HANDLE, handle);
success:
/* if the browse group descriptor is NULL,
* ensure that the record belongs to the ROOT group */
if (sdp_data_get(rec, SDP_ATTR_BROWSE_GRP_LIST) == NULL) {
uuid_t uuid;
sdp_uuid16_create(&uuid, PUBLIC_BROWSE_GROUP);
sdp_pattern_add_uuid(rec, &uuid);
}
update_db_timestamp();
/* Build a rsp buffer */
bt_put_unaligned(htonl(rec->handle), (uint32_t *) rsp->data);
rsp->data_size = sizeof(uint32_t);
return 0;
invalid:
bt_put_unaligned(htons(SDP_INVALID_SYNTAX), (uint16_t *) rsp->data);
rsp->data_size = sizeof(uint16_t);
return -1;
}
/*
* Update a service record
*/
int service_update_req(sdp_req_t *req, sdp_buf_t *rsp)
{
sdp_record_t *orec, *nrec;
int status = 0, scanned = 0;
uint8_t *p = req->buf + sizeof(sdp_pdu_hdr_t);
int bufsize = req->len - sizeof(sdp_pdu_hdr_t);
uint32_t handle = ntohl(bt_get_unaligned((uint32_t *) p));
SDPDBG("Svc Rec Handle: 0x%x", handle);
p += sizeof(uint32_t);
bufsize -= sizeof(uint32_t);
orec = sdp_record_find(handle);
SDPDBG("SvcRecOld: %p", orec);
if (!orec) {
status = SDP_INVALID_RECORD_HANDLE;
goto done;
}
nrec = extract_pdu_server(BDADDR_ANY, p, bufsize, handle, &scanned);
if (!nrec) {
status = SDP_INVALID_SYNTAX;
goto done;
}
assert(nrec == orec);
update_db_timestamp();
done:
p = rsp->data;
bt_put_unaligned(htons(status), (uint16_t *) p);
rsp->data_size = sizeof(uint16_t);
return status;
}
/*
* Remove a registered service record
*/
int service_remove_req(sdp_req_t *req, sdp_buf_t *rsp)
{
uint8_t *p = req->buf + sizeof(sdp_pdu_hdr_t);
uint32_t handle = ntohl(bt_get_unaligned((uint32_t *) p));
sdp_record_t *rec;
int status = 0;
/* extract service record handle */
rec = sdp_record_find(handle);
if (rec) {
sdp_svcdb_collect(rec);
status = sdp_record_remove(handle);
sdp_record_free(rec);
if (status == 0)
update_db_timestamp();
} else {
status = SDP_INVALID_RECORD_HANDLE;
SDPDBG("Could not find record : 0x%x", handle);
}
p = rsp->data;
bt_put_unaligned(htons(status), (uint16_t *) p);
rsp->data_size = sizeof(uint16_t);
return status;
}
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