/*
* 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)
{
if (fixed_dbts) {
sdp_data_t *d = sdp_data_alloc(SDP_UINT32, &fixed_dbts);
sdp_attr_replace(server, SDP_ATTR_SVCDB_STATE, d);
} else {
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);
}
}
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;
}
/*
* 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_be32(rec->handle, rsp->data);
rsp->data_size = sizeof(uint32_t);
return 0;
invalid:
bt_put_be16(SDP_INVALID_SYNTAX, rsp->data);
rsp->data_size = sizeof(uint16_t);
return -1;
}
/* 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 = bt_get_be16(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 = bt_get_be32(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 = bt_get_be16(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;
}
