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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) 2002-2006 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 <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/sdp.h>
#include <bluetooth/sdp_lib.h>
#include <netinet/in.h>
#include "sdpd.h"
#include "logging.h"
extern void update_db_timestamp(void);
// FIXME: refactor for server-side
static sdp_record_t *extract_pdu_server(bdaddr_t *device, uint8_t *p, 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, &dtd, &seqlen);
p += *scanned;
lookAheadAttrId = ntohs(bt_get_unaligned((uint16_t *) (p + sizeof(uint8_t))));
debug("Look ahead attr id : %d", lookAheadAttrId);
if (lookAheadAttrId == SDP_ATTR_RECORD_HANDLE) {
handle = ntohl(bt_get_unaligned((uint32_t *) (p +
sizeof(uint8_t) + sizeof(uint16_t) +
sizeof(uint8_t))));
debug("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);
}
}
while (localExtractedLength < seqlen) {
int attrSize = sizeof(uint8_t);
int attrValueLength = 0;
debug("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);
debug("DTD of attrId : %d Attr id : 0x%x", dtd, attrId);
pAttr = sdp_extract_attr(p + attrSize, &attrValueLength, rec);
debug("Attr id : 0x%x attrValueLength : %d", attrId, attrValueLength);
attrSize += attrValueLength;
if (pAttr == NULL) {
debug("Terminating extraction of attributes");
break;
}
localExtractedLength += attrSize;
p += attrSize;
sdp_attr_replace(rec, attrId, pAttr);
extractStatus = 0;
debug("Extract PDU, seqLength: %d localExtractedLength: %d",
seqlen, localExtractedLength);
}
if (extractStatus == 0) {
debug("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);
sdp_record_t *rec;
req->flags = *p++;
if (req->flags & SDP_DEVICE_RECORD) {
bacpy(&req->device, (bdaddr_t *) p);
p += sizeof(bdaddr_t);
}
// save image of PDU: we need it when clients request this attribute
rec = extract_pdu_server(&req->device, p, 0xffffffff, &scanned);
if (!rec)
goto invalid;
if (rec->handle == 0xffffffff) {
rec->handle = sdp_next_handle();
if (rec->handle < 0x10000)
goto invalid;
} else {
if (sdp_record_find(rec->handle))
goto invalid;
}
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);
/*
* 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;
int status = 0, scanned = 0;
uint8_t *p = req->buf + sizeof(sdp_pdu_hdr_t);
uint32_t handle = ntohl(bt_get_unaligned((uint32_t *) p));
debug("Svc Rec Handle: 0x%x", handle);
p += sizeof(uint32_t);
orec = sdp_record_find(handle);
debug("SvcRecOld: %p", orec);
if (orec) {
sdp_record_t *nrec = extract_pdu_server(BDADDR_ANY, p, handle, &scanned);
if (nrec && handle == nrec->handle)
update_db_timestamp();
else {
debug("SvcRecHandle : 0x%x", handle);
debug("SvcRecHandleNew : 0x%x", nrec->handle);
debug("SvcRecNew : %p", nrec);
debug("SvcRecOld : %p", orec);
debug("Failure to update, restore old value");
if (nrec)
sdp_record_free(nrec);
status = SDP_INVALID_SYNTAX;
}
} else
status = SDP_INVALID_RECORD_HANDLE;
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 */
p += sizeof(uint32_t);
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;
debug("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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