diff options
Diffstat (limited to 'sdpd')
-rw-r--r-- | sdpd/Makefile.am | 11 | ||||
-rw-r--r-- | sdpd/cstate.c | 95 | ||||
-rw-r--r-- | sdpd/request.c | 923 | ||||
-rw-r--r-- | sdpd/sdpd.h | 94 | ||||
-rw-r--r-- | sdpd/server.c | 280 | ||||
-rw-r--r-- | sdpd/service.c | 659 | ||||
-rw-r--r-- | sdpd/servicedb.c | 304 |
7 files changed, 2366 insertions, 0 deletions
diff --git a/sdpd/Makefile.am b/sdpd/Makefile.am new file mode 100644 index 00000000..6ce2f85b --- /dev/null +++ b/sdpd/Makefile.am @@ -0,0 +1,11 @@ + +noinst_LIBRARIES = libsdpserver.a + +libsdpserver_a_SOURCES = \ + sdpd.h server.c cstate.c request.c service.c servicedb.c + +AM_CFLAGS = @BLUEZ_CFLAGS@ @GLIB_CFLAGS@ + +INCLUDES = -I$(top_srcdir)/common + +MAINTAINERCLEANFILES = Makefile.in diff --git a/sdpd/cstate.c b/sdpd/cstate.c new file mode 100644 index 00000000..d0adf08a --- /dev/null +++ b/sdpd/cstate.c @@ -0,0 +1,95 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2001-2002 Nokia Corporation + * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> + * Copyright (C) 2002-2008 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 <sys/time.h> +#include <sys/socket.h> + +#include <bluetooth/bluetooth.h> +#include <bluetooth/sdp.h> +#include <bluetooth/sdp_lib.h> + +#include "sdpd.h" + +typedef struct _sdp_cstate_list sdp_cstate_list_t; + +struct _sdp_cstate_list { + sdp_cstate_list_t *next; + uint32_t timestamp; + sdp_buf_t buf; +}; + +static sdp_cstate_list_t *cstates; + +// FIXME: should probably remove it when it's found +sdp_buf_t *sdp_get_cached_rsp(sdp_cont_state_t *cstate) +{ + sdp_cstate_list_t *p; + + for (p = cstates; p; p = p->next) + if (p->timestamp == cstate->timestamp) + return &p->buf; + return 0; +} + +uint32_t sdp_cstate_alloc_buf(sdp_buf_t *buf) +{ + sdp_cstate_list_t *cstate = malloc(sizeof(sdp_cstate_list_t)); + uint8_t *data = malloc(buf->data_size); + + memcpy(data, buf->data, buf->data_size); + memset((char *)cstate, 0, sizeof(sdp_cstate_list_t)); + cstate->buf.data = data; + cstate->buf.data_size = buf->data_size; + cstate->buf.buf_size = buf->data_size; + cstate->timestamp = sdp_get_time(); + cstate->next = cstates; + cstates = cstate; + return cstate->timestamp; +} + +/* + * 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() +{ + /* + * 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; +} diff --git a/sdpd/request.c b/sdpd/request.c new file mode 100644 index 00000000..9020dd38 --- /dev/null +++ b/sdpd/request.c @@ -0,0 +1,923 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2001-2002 Nokia Corporation + * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> + * Copyright (C) 2002-2008 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 <string.h> +#include <limits.h> +#include <sys/socket.h> + +#include <bluetooth/bluetooth.h> +#include <bluetooth/l2cap.h> +#include <bluetooth/sdp.h> +#include <bluetooth/sdp_lib.h> + +#include <netinet/in.h> + +#include "sdpd.h" +#include "logging.h" + +#define MIN(x, y) ((x) < (y))? (x): (y) + +/* Additional values for checking datatype (not in spec) */ +#define SDP_TYPE_UUID 0xfe +#define SDP_TYPE_ANY 0xff + +/* + * Generic data element sequence extractor. Builds + * a list whose elements are those found in the + * sequence. The data type of elements found in the + * sequence is returned in the reference pDataType + */ +static int extract_des(uint8_t *buf, int len, sdp_list_t **svcReqSeq, uint8_t *pDataType, uint8_t expectedType) +{ + uint8_t seqType; + int scanned, data_size = 0; + short numberOfElements = 0; + int seqlen = 0; + sdp_list_t *pSeq = NULL; + uint8_t dataType; + int status = 0; + const uint8_t *p; + int bufsize; + + scanned = sdp_extract_seqtype_safe(buf, len, &seqType, &data_size); + + debug("Seq type : %d", seqType); + if (!scanned || (seqType != SDP_SEQ8 && seqType != SDP_SEQ16)) { + error("Unknown seq type"); + return -1; + } + p = buf + scanned; + bufsize = len - scanned; + + debug("Data size : %d", data_size); + + for (;;) { + char *pElem = NULL; + int localSeqLength = 0; + + if (bufsize < sizeof(uint8_t)) { + debug("->Unexpected end of buffer"); + return -1; + } + + dataType = *(uint8_t *)p; + debug("Data type: 0x%02x", dataType); + + if (expectedType == SDP_TYPE_UUID) { + if (dataType != SDP_UUID16 && dataType != SDP_UUID32 && dataType != SDP_UUID128) { + debug("->Unexpected Data type (expected UUID_ANY)"); + return -1; + } + } else if (expectedType != SDP_TYPE_ANY && dataType != expectedType) { + debug("->Unexpected Data type (expected 0x%02x)", expectedType); + return -1; + } + + switch (dataType) { + case SDP_UINT16: + p += sizeof(uint8_t); + seqlen += sizeof(uint8_t); + bufsize -= sizeof(uint8_t); + if (bufsize < sizeof(uint16_t)) { + debug("->Unexpected end of buffer"); + return -1; + } + + pElem = malloc(sizeof(uint16_t)); + bt_put_unaligned(ntohs(bt_get_unaligned((uint16_t *)p)), (uint16_t *)pElem); + p += sizeof(uint16_t); + seqlen += sizeof(uint16_t); + bufsize -= sizeof(uint16_t); + break; + case SDP_UINT32: + p += sizeof(uint8_t); + seqlen += sizeof(uint8_t); + bufsize -= sizeof(uint8_t); + if (bufsize < (int)sizeof(uint32_t)) { + debug("->Unexpected end of buffer"); + return -1; + } + + pElem = malloc(sizeof(uint32_t)); + bt_put_unaligned(ntohl(bt_get_unaligned((uint32_t *)p)), (uint32_t *)pElem); + p += sizeof(uint32_t); + seqlen += sizeof(uint32_t); + bufsize -= sizeof(uint32_t); + break; + case SDP_UUID16: + case SDP_UUID32: + case SDP_UUID128: + pElem = malloc(sizeof(uuid_t)); + status = sdp_uuid_extract_safe(p, bufsize, (uuid_t *) pElem, &localSeqLength); + if (status == 0) { + seqlen += localSeqLength; + p += localSeqLength; + bufsize -= localSeqLength; + } + break; + default: + return -1; + } + if (status == 0) { + pSeq = sdp_list_append(pSeq, pElem); + numberOfElements++; + debug("No of elements : %d", numberOfElements); + + if (seqlen == data_size) + break; + else if (seqlen > data_size || seqlen > len) + return -1; + } else + free(pElem); + } + *svcReqSeq = pSeq; + scanned += seqlen; + *pDataType = dataType; + return scanned; +} + +static int sdp_set_cstate_pdu(sdp_buf_t *buf, sdp_cont_state_t *cstate) +{ + uint8_t *pdata = buf->data + buf->data_size; + int length = 0; + + if (cstate) { + debug("Non null sdp_cstate_t id : 0x%lx", cstate->timestamp); + *(uint8_t *)pdata = sizeof(sdp_cont_state_t); + pdata += sizeof(uint8_t); + length += sizeof(uint8_t); + memcpy(pdata, cstate, sizeof(sdp_cont_state_t)); + length += sizeof(sdp_cont_state_t); + } else { + // set "null" continuation state + *(uint8_t *)pdata = 0; + pdata += sizeof(uint8_t); + length += sizeof(uint8_t); + } + buf->data_size += length; + return length; +} + +static sdp_cont_state_t *sdp_cstate_get(uint8_t *buffer) +{ + uint8_t *pdata = buffer; + uint8_t cStateSize = *(uint8_t *)pdata; + + /* + * Check if continuation state exists, if yes attempt + * to get response remainder from cache, else send error + */ + debug("Continuation State size : %d", cStateSize); + + pdata += sizeof(uint8_t); + if (cStateSize != 0) { + sdp_cont_state_t *cstate = malloc(sizeof(sdp_cont_state_t)); + if (!cstate) + return NULL; + memcpy(cstate, (sdp_cont_state_t *)pdata, sizeof(sdp_cont_state_t)); + debug("Cstate TS : 0x%lx", cstate->timestamp); + debug("Bytes sent : %d", cstate->cStateValue.maxBytesSent); + return cstate; + } + return NULL; +} + +/* + * The matching process is defined as "each and every UUID + * specified in the "search pattern" must be present in the + * "target pattern". Here "search pattern" is the set of UUIDs + * specified by the service discovery client and "target pattern" + * is the set of UUIDs present in a service record. + * + * Return 1 if each and every UUID in the search + * pattern exists in the target pattern, 0 if the + * match succeeds and -1 on error. + */ +static int sdp_match_uuid(sdp_list_t *search, sdp_list_t *pattern) +{ + /* + * The target is a sorted list, so we need not look + * at all elements to confirm existence of an element + * from the search pattern + */ + int patlen = sdp_list_len(pattern); + + if (patlen < sdp_list_len(search)) + return -1; + for (; search; search = search->next) { + uuid_t *uuid128; + void *data = search->data; + sdp_list_t *list; + if (data == NULL) + return -1; + + // create 128-bit form of the search UUID + uuid128 = sdp_uuid_to_uuid128((uuid_t *)data); + list = sdp_list_find(pattern, uuid128, sdp_uuid128_cmp); + bt_free(uuid128); + if (!list) + return 0; + } + return 1; +} + +/* + * Service search request PDU. This method extracts the search pattern + * (a sequence of UUIDs) and calls the matching function + * to find matching services + */ +static int service_search_req(sdp_req_t *req, sdp_buf_t *buf) +{ + int status = 0, i, plen, mlen, mtu, scanned; + sdp_list_t *pattern = NULL; + uint16_t expected, actual, rsp_count = 0; + uint8_t dtd; + sdp_cont_state_t *cstate = NULL; + uint8_t *pCacheBuffer = NULL; + int handleSize = 0; + uint32_t cStateId = 0; + short *pTotalRecordCount, *pCurrentRecordCount; + uint8_t *pdata = req->buf + sizeof(sdp_pdu_hdr_t); + + scanned = extract_des(pdata, req->len - sizeof(sdp_pdu_hdr_t), + &pattern, &dtd, SDP_TYPE_UUID); + + if (scanned == -1) { + status = SDP_INVALID_SYNTAX; + goto done; + } + pdata += scanned; + + plen = ntohs(((sdp_pdu_hdr_t *)(req->buf))->plen); + mlen = scanned + sizeof(uint16_t) + 1; + // ensure we don't read past buffer + if (plen < mlen || plen != mlen + *(uint8_t *)(pdata+sizeof(uint16_t))) { + status = SDP_INVALID_SYNTAX; + goto done; + } + + expected = ntohs(bt_get_unaligned((uint16_t *)pdata)); + + debug("Expected count: %d", expected); + debug("Bytes scanned : %d", scanned); + + pdata += sizeof(uint16_t); + + /* + * Check if continuation state exists, if yes attempt + * to get rsp remainder from cache, else send error + */ + cstate = sdp_cstate_get(pdata); + + mtu = req->mtu - sizeof(sdp_pdu_hdr_t) - sizeof(uint16_t) - sizeof(uint16_t) - SDP_CONT_STATE_SIZE; + actual = MIN(expected, mtu >> 2); + + /* make space in the rsp buffer for total and current record counts */ + pdata = buf->data; + + /* total service record count = 0 */ + pTotalRecordCount = (short *)pdata; + bt_put_unaligned(0, (uint16_t *)pdata); + pdata += sizeof(uint16_t); + buf->data_size += sizeof(uint16_t); + + /* current service record count = 0 */ + pCurrentRecordCount = (short *)pdata; + bt_put_unaligned(0, (uint16_t *)pdata); + pdata += sizeof(uint16_t); + buf->data_size += sizeof(uint16_t); + + if (cstate == NULL) { + /* for every record in the DB, do a pattern search */ + sdp_list_t *list = sdp_get_record_list(); + + handleSize = 0; + for (; list && rsp_count < expected; list = list->next) { + sdp_record_t *rec = (sdp_record_t *) list->data; + + debug("Checking svcRec : 0x%x", rec->handle); + + if (sdp_match_uuid(pattern, rec->pattern) > 0 && + sdp_check_access(rec->handle, &req->device)) { + rsp_count++; + bt_put_unaligned(htonl(rec->handle), (uint32_t *)pdata); + pdata += sizeof(uint32_t); + handleSize += sizeof(uint32_t); + } + } + + debug("Match count: %d", rsp_count); + + buf->data_size += handleSize; + bt_put_unaligned(htons(rsp_count), (uint16_t *)pTotalRecordCount); + bt_put_unaligned(htons(rsp_count), (uint16_t *)pCurrentRecordCount); + + if (rsp_count > actual) { + /* cache the rsp and generate a continuation state */ + cStateId = sdp_cstate_alloc_buf(buf); + /* + * subtract handleSize since we now send only + * a subset of handles + */ + buf->data_size -= handleSize; + } else { + /* NULL continuation state */ + sdp_set_cstate_pdu(buf, NULL); + } + } + + /* under both the conditions below, the rsp buffer is not built yet */ + if (cstate || cStateId > 0) { + short lastIndex = 0; + + if (cstate) { + /* + * Get the previous sdp_cont_state_t and obtain + * the cached rsp + */ + sdp_buf_t *pCache = sdp_get_cached_rsp(cstate); + if (pCache) { + pCacheBuffer = pCache->data; + /* get the rsp_count from the cached buffer */ + rsp_count = ntohs(bt_get_unaligned((uint16_t *)pCacheBuffer)); + + /* get index of the last sdp_record_t sent */ + lastIndex = cstate->cStateValue.lastIndexSent; + } else { + status = SDP_INVALID_CSTATE; + goto done; + } + } else { + pCacheBuffer = buf->data; + lastIndex = 0; + } + + /* + * Set the local buffer pointer to after the + * current record count and increment the cached + * buffer pointer to beyond the counters + */ + pdata = (uint8_t *) pCurrentRecordCount + sizeof(uint16_t); + + /* increment beyond the totalCount and the currentCount */ + pCacheBuffer += 2 * sizeof(uint16_t); + + if (cstate) { + handleSize = 0; + for (i = lastIndex; (i - lastIndex) < actual && i < rsp_count; i++) { + bt_put_unaligned(bt_get_unaligned((uint32_t *)(pCacheBuffer + i * sizeof(uint32_t))), (uint32_t *)pdata); + pdata += sizeof(uint32_t); + handleSize += sizeof(uint32_t); + } + } else { + handleSize = actual << 2; + i = actual; + } + + buf->data_size += handleSize; + bt_put_unaligned(htons(rsp_count), (uint16_t *)pTotalRecordCount); + bt_put_unaligned(htons(i - lastIndex), (uint16_t *)pCurrentRecordCount); + + if (i == rsp_count) { + /* set "null" continuationState */ + sdp_set_cstate_pdu(buf, NULL); + } else { + /* + * there's more: set lastIndexSent to + * the new value and move on + */ + sdp_cont_state_t newState; + + debug("Setting non-NULL sdp_cstate_t"); + + if (cstate) + memcpy((char *)&newState, cstate, sizeof(sdp_cont_state_t)); + else { + memset((char *)&newState, 0, sizeof(sdp_cont_state_t)); + newState.timestamp = cStateId; + } + newState.cStateValue.lastIndexSent = i; + sdp_set_cstate_pdu(buf, &newState); + } + } + +done: + if (cstate) + free(cstate); + if (pattern) + sdp_list_free(pattern, free); + + return status; +} + +/* + * Extract attribute identifiers from the request PDU. + * Clients could request a subset of attributes (by id) + * from a service record, instead of the whole set. The + * requested identifiers are present in the PDU form of + * the request + */ +static int extract_attrs(sdp_record_t *rec, sdp_list_t *seq, uint8_t dtd, sdp_buf_t *buf) +{ + if (!rec) + return SDP_INVALID_RECORD_HANDLE; + + if (seq) + debug("Entries in attr seq : %d", sdp_list_len(seq)); + else + debug("NULL attribute descriptor"); + + debug("AttrDataType : %d", dtd); + + if (seq == NULL) { + debug("Attribute sequence is NULL"); + return 0; + } + if (dtd == SDP_UINT16) + for (; seq; seq = seq->next) { + uint16_t attr = bt_get_unaligned((uint16_t *)seq->data); + sdp_data_t *a = (sdp_data_t *)sdp_data_get(rec, attr); + if (a) + sdp_append_to_pdu(buf, a); + } + else if (dtd == SDP_UINT32) { + sdp_buf_t pdu; + sdp_gen_record_pdu(rec, &pdu); + for (; seq; seq = seq->next) { + uint32_t range = bt_get_unaligned((uint32_t *)seq->data); + uint16_t attr; + uint16_t low = (0xffff0000 & range) >> 16; + uint16_t high = 0x0000ffff & range; + sdp_data_t *data; + + debug("attr range : 0x%x", range); + debug("Low id : 0x%x", low); + debug("High id : 0x%x", high); + + if (low == 0x0000 && high == 0xffff && pdu.data_size <= buf->buf_size) { + /* copy it */ + memcpy(buf->data, pdu.data, pdu.data_size); + buf->data_size = pdu.data_size; + break; + } + /* (else) sub-range of attributes */ + for (attr = low; attr < high; attr++) { + data = sdp_data_get(rec, attr); + if (data) + sdp_append_to_pdu(buf, data); + } + data = sdp_data_get(rec, high); + if (data) + sdp_append_to_pdu(buf, data); + } + free(pdu.data); + } else { + error("Unexpected data type : 0x%x", dtd); + error("Expect uint16_t or uint32_t"); + return SDP_INVALID_SYNTAX; + } + return 0; +} + +/* + * A request for the attributes of a service record. + * First check if the service record (specified by + * service record handle) exists, then call the attribute + * streaming function + */ +static int service_attr_req(sdp_req_t *req, sdp_buf_t *buf) +{ + sdp_cont_state_t *cstate = NULL; + uint8_t *pResponse = NULL; + short cstate_size = 0; + sdp_list_t *seq = NULL; + uint8_t dtd = 0; + int scanned = 0; + int max_rsp_size; + int status = 0, plen, mlen; + uint8_t *pdata = req->buf + sizeof(sdp_pdu_hdr_t); + uint32_t handle = ntohl(bt_get_unaligned((uint32_t *)pdata)); + + pdata += sizeof(uint32_t); + max_rsp_size = ntohs(bt_get_unaligned((uint16_t *)pdata)); + pdata += sizeof(uint16_t); + + /* extract the attribute list */ + scanned = extract_des(pdata, req->len - sizeof(sdp_pdu_hdr_t), + &seq, &dtd, SDP_TYPE_ANY); + if (scanned == -1) { + status = SDP_INVALID_SYNTAX; + goto done; + } + pdata += scanned; + + plen = ntohs(((sdp_pdu_hdr_t *)(req->buf))->plen); + mlen = scanned + sizeof(uint32_t) + sizeof(uint16_t) + 1; + // ensure we don't read past buffer + if (plen < mlen || plen != mlen + *(uint8_t *)pdata) { + status = SDP_INVALID_SYNTAX; + goto done; + } + + /* + * if continuation state exists, attempt + * to get rsp remainder from cache, else send error + */ + cstate = sdp_cstate_get(pdata); + + debug("SvcRecHandle : 0x%x", handle); + debug("max_rsp_size : %d", max_rsp_size); + + /* + * Calculate Attribute size acording to MTU + * We can send only (MTU - sizeof(sdp_pdu_hdr_t) - sizeof(sdp_cont_state_t)) + */ + max_rsp_size = MIN(max_rsp_size, req->mtu - sizeof(sdp_pdu_hdr_t) - + sizeof(uint32_t) - SDP_CONT_STATE_SIZE - sizeof(uint16_t)); + + /* pull header for AttributeList byte count */ + buf->data += sizeof(uint16_t); + buf->buf_size -= sizeof(uint16_t); + + if (cstate) { + sdp_buf_t *pCache = sdp_get_cached_rsp(cstate); + + debug("Obtained cached rsp : %p", pCache); + + if (pCache) { + short sent = MIN(max_rsp_size, pCache->data_size - cstate->cStateValue.maxBytesSent); + pResponse = pCache->data; + memcpy(buf->data, pResponse + cstate->cStateValue.maxBytesSent, sent); + buf->data_size += sent; + cstate->cStateValue.maxBytesSent += sent; + + debug("Response size : %d sending now : %d bytes sent so far : %d", + pCache->data_size, sent, cstate->cStateValue.maxBytesSent); + if (cstate->cStateValue.maxBytesSent == pCache->data_size) + cstate_size = sdp_set_cstate_pdu(buf, NULL); + else + cstate_size = sdp_set_cstate_pdu(buf, cstate); + } else { + status = SDP_INVALID_CSTATE; + error("NULL cache buffer and non-NULL continuation state"); + } + } else { + sdp_record_t *rec = sdp_record_find(handle); + status = extract_attrs(rec, seq, dtd, buf); + if (buf->data_size > max_rsp_size) { + sdp_cont_state_t newState; + + memset((char *)&newState, 0, sizeof(sdp_cont_state_t)); + newState.timestamp = sdp_cstate_alloc_buf(buf); + /* + * Reset the buffer size to the maximum expected and + * set the sdp_cont_state_t + */ + debug("Creating continuation state of size : %d", buf->data_size); + buf->data_size = max_rsp_size; + newState.cStateValue.maxBytesSent = max_rsp_size; + cstate_size = sdp_set_cstate_pdu(buf, &newState); + } else { + if (buf->data_size == 0) + sdp_append_to_buf(buf, 0, 0); + cstate_size = sdp_set_cstate_pdu(buf, NULL); + } + } + + // push header + buf->data -= sizeof(uint16_t); + buf->buf_size += sizeof(uint16_t); + +done: + if (cstate) + free(cstate); + if (seq) + sdp_list_free(seq, free); + if (status) + return status; + + /* set attribute list byte count */ + bt_put_unaligned(htons(buf->data_size - cstate_size), (uint16_t *)buf->data); + buf->data_size += sizeof(uint16_t); + return 0; +} + +/* + * combined service search and attribute extraction + */ +static int service_search_attr_req(sdp_req_t *req, sdp_buf_t *buf) +{ + int status = 0, plen, totscanned; + uint8_t *pdata, *pResponse = NULL; + int scanned, max, rsp_count = 0; + sdp_list_t *pattern = NULL, *seq = NULL, *svcList; + sdp_cont_state_t *cstate = NULL; + short cstate_size = 0; + uint8_t dtd = 0; + sdp_buf_t tmpbuf; + + tmpbuf.data = NULL; + pdata = req->buf + sizeof(sdp_pdu_hdr_t); + scanned = extract_des(pdata, req->len - sizeof(sdp_pdu_hdr_t), + &pattern, &dtd, SDP_TYPE_UUID); + if (scanned == -1) { + status = SDP_INVALID_SYNTAX; + goto done; + } + totscanned = scanned; + + debug("Bytes scanned: %d", scanned); + + pdata += scanned; + max = ntohs(bt_get_unaligned((uint16_t *)pdata)); + pdata += sizeof(uint16_t); + + debug("Max Attr expected: %d", max); + + /* extract the attribute list */ + scanned = extract_des(pdata, req->len - sizeof(sdp_pdu_hdr_t), + &seq, &dtd, SDP_TYPE_ANY); + if (scanned == -1) { + status = SDP_INVALID_SYNTAX; + goto done; + } + pdata += scanned; + totscanned += scanned + sizeof(uint16_t) + 1; + + plen = ntohs(((sdp_pdu_hdr_t *)(req->buf))->plen); + if (plen < totscanned || plen != totscanned + *(uint8_t *)pdata) { + status = SDP_INVALID_SYNTAX; + goto done; + } + + /* + * if continuation state exists attempt + * to get rsp remainder from cache, else send error + */ + cstate = sdp_cstate_get(pdata); // continuation information + + svcList = sdp_get_record_list(); + + tmpbuf.data = malloc(USHRT_MAX); + tmpbuf.data_size = 0; + tmpbuf.buf_size = USHRT_MAX; + memset(tmpbuf.data, 0, USHRT_MAX); + + /* + * Calculate Attribute size acording to MTU + * We can send only (MTU - sizeof(sdp_pdu_hdr_t) - sizeof(sdp_cont_state_t)) + */ + max = MIN(max, req->mtu - sizeof(sdp_pdu_hdr_t) - SDP_CONT_STATE_SIZE - sizeof(uint16_t)); + + /* pull header for AttributeList byte count */ + buf->data += sizeof(uint16_t); + buf->buf_size -= sizeof(uint16_t); + + if (cstate == NULL) { + /* no continuation state -> create new response */ + sdp_list_t *p; + for (p = svcList; p; p = p->next) { + sdp_record_t *rec = (sdp_record_t *) p->data; + if (sdp_match_uuid(pattern, rec->pattern) > 0 && + sdp_check_access(rec->handle, &req->device)) { + rsp_count++; + status = extract_attrs(rec, seq, dtd, &tmpbuf); + + debug("Response count : %d", rsp_count); + debug("Local PDU size : %d", tmpbuf.data_size); + if (status) { + debug("Extract attr from record returns err"); + break; + } + if (buf->data_size + tmpbuf.data_size < buf->buf_size) { + // to be sure no relocations + sdp_append_to_buf(buf, tmpbuf.data, tmpbuf.data_size); + tmpbuf.data_size = 0; + memset(tmpbuf.data, 0, USHRT_MAX); + } else { + error("Relocation needed"); + break; + } + debug("Net PDU size : %d", buf->data_size); + } + } + if (buf->data_size > max) { + sdp_cont_state_t newState; + + memset((char *)&newState, 0, sizeof(sdp_cont_state_t)); + newState.timestamp = sdp_cstate_alloc_buf(buf); + /* + * Reset the buffer size to the maximum expected and + * set the sdp_cont_state_t + */ + buf->data_size = max; + newState.cStateValue.maxBytesSent = max; + cstate_size = sdp_set_cstate_pdu(buf, &newState); + } else + cstate_size = sdp_set_cstate_pdu(buf, NULL); + } else { + /* continuation State exists -> get from cache */ + sdp_buf_t *pCache = sdp_get_cached_rsp(cstate); + if (pCache) { + uint16_t sent = MIN(max, pCache->data_size - cstate->cStateValue.maxBytesSent); + pResponse = pCache->data; + memcpy(buf->data, pResponse + cstate->cStateValue.maxBytesSent, sent); + buf->data_size += sent; + cstate->cStateValue.maxBytesSent += sent; + if (cstate->cStateValue.maxBytesSent == pCache->data_size) + cstate_size = sdp_set_cstate_pdu(buf, NULL); + else + cstate_size = sdp_set_cstate_pdu(buf, cstate); + } else { + status = SDP_INVALID_CSTATE; + debug("Non-null continuation state, but null cache buffer"); + } + } + + if (!rsp_count && !cstate) { + // found nothing + buf->data_size = 0; + sdp_append_to_buf(buf, tmpbuf.data, tmpbuf.data_size); + sdp_set_cstate_pdu(buf, NULL); + } + + // push header + buf->data -= sizeof(uint16_t); + buf->buf_size += sizeof(uint16_t); + + if (!status) { + /* set attribute list byte count */ + bt_put_unaligned(htons(buf->data_size - cstate_size), (uint16_t *)buf->data); + buf->data_size += sizeof(uint16_t); + } + +done: + if (cstate) + free(cstate); + if (tmpbuf.data) + free(tmpbuf.data); + if (pattern) + sdp_list_free(pattern, free); + if (seq) + sdp_list_free(seq, free); + return status; +} + +/* + * Top level request processor. Calls the appropriate processing + * function based on request type. Handles service registration + * client requests also. + */ +static void process_request(sdp_req_t *req) +{ + sdp_pdu_hdr_t *reqhdr = (sdp_pdu_hdr_t *)req->buf; + sdp_pdu_hdr_t *rsphdr; + sdp_buf_t rsp; + uint8_t *buf = malloc(USHRT_MAX); + int sent = 0; + int status = SDP_INVALID_SYNTAX; + + memset(buf, 0, USHRT_MAX); + rsp.data = buf + sizeof(sdp_pdu_hdr_t); + rsp.data_size = 0; + rsp.buf_size = USHRT_MAX - sizeof(sdp_pdu_hdr_t); + rsphdr = (sdp_pdu_hdr_t *)buf; + + if (ntohs(reqhdr->plen) != req->len - sizeof(sdp_pdu_hdr_t)) { + status = SDP_INVALID_PDU_SIZE; + goto send_rsp; + } + switch (reqhdr->pdu_id) { + case SDP_SVC_SEARCH_REQ: + debug("Got a svc srch req"); + status = service_search_req(req, &rsp); + rsphdr->pdu_id = SDP_SVC_SEARCH_RSP; + break; + case SDP_SVC_ATTR_REQ: + debug("Got a svc attr req"); + status = service_attr_req(req, &rsp); + rsphdr->pdu_id = SDP_SVC_ATTR_RSP; + break; + case SDP_SVC_SEARCH_ATTR_REQ: + debug("Got a svc srch attr req"); + status = service_search_attr_req(req, &rsp); + rsphdr->pdu_id = SDP_SVC_SEARCH_ATTR_RSP; + break; + /* Following requests are allowed only for local connections */ + case SDP_SVC_REGISTER_REQ: + debug("Service register request"); + if (req->local) { + status = service_register_req(req, &rsp); + rsphdr->pdu_id = SDP_SVC_REGISTER_RSP; + } + break; + case SDP_SVC_UPDATE_REQ: + debug("Service update request"); + if (req->local) { + status = service_update_req(req, &rsp); + rsphdr->pdu_id = SDP_SVC_UPDATE_RSP; + } + break; + case SDP_SVC_REMOVE_REQ: + debug("Service removal request"); + if (req->local) { + status = service_remove_req(req, &rsp); + rsphdr->pdu_id = SDP_SVC_REMOVE_RSP; + } + break; + default: + error("Unknown PDU ID : 0x%x received", reqhdr->pdu_id); + status = SDP_INVALID_SYNTAX; + break; + } + +send_rsp: + if (status) { + rsphdr->pdu_id = SDP_ERROR_RSP; + bt_put_unaligned(htons(status), (uint16_t *)rsp.data); + rsp.data_size = sizeof(uint16_t); + } + + debug("Sending rsp. status %d", status); + + rsphdr->tid = reqhdr->tid; + rsphdr->plen = htons(rsp.data_size); + + /* point back to the real buffer start and set the real rsp length */ + rsp.data_size += sizeof(sdp_pdu_hdr_t); + rsp.data = buf; + + /* stream the rsp PDU */ + sent = send(req->sock, rsp.data, rsp.data_size, 0); + + debug("Bytes Sent : %d", sent); + + free(rsp.data); + free(req->buf); +} + +void handle_request(int sk, uint8_t *data, int len) +{ + struct sockaddr_l2 sa; + socklen_t size; + sdp_req_t req; + + size = sizeof(sa); + if (getpeername(sk, (struct sockaddr *) &sa, &size) < 0) + return; + + if (sa.l2_family == AF_BLUETOOTH) { + struct l2cap_options lo; + memset(&lo, 0, sizeof(lo)); + size = sizeof(lo); + getsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &lo, &size); + bacpy(&req.bdaddr, &sa.l2_bdaddr); + req.mtu = lo.omtu; + req.local = 0; + memset(&sa, 0, sizeof(sa)); + size = sizeof(sa); + getsockname(sk, (struct sockaddr *) &sa, &size); + bacpy(&req.device, &sa.l2_bdaddr); + } else { + bacpy(&req.device, BDADDR_ANY); + bacpy(&req.bdaddr, BDADDR_LOCAL); + req.mtu = 2048; + req.local = 1; + } + + req.sock = sk; + req.buf = data; + req.len = len; + + process_request(&req); +} diff --git a/sdpd/sdpd.h b/sdpd/sdpd.h new file mode 100644 index 00000000..30f05df4 --- /dev/null +++ b/sdpd/sdpd.h @@ -0,0 +1,94 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2001-2002 Nokia Corporation + * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> + * Copyright (C) 2002-2008 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 + * + */ + +#include <bluetooth/bluetooth.h> +#include <bluetooth/sdp.h> + +typedef struct request { + bdaddr_t device; + bdaddr_t bdaddr; + int local; + int sock; + int mtu; + int flags; + uint8_t *buf; + int len; +} sdp_req_t; + +void handle_request(int sk, uint8_t *data, int len); + +int service_register_req(sdp_req_t *req, sdp_buf_t *rsp); +int service_update_req(sdp_req_t *req, sdp_buf_t *rsp); +int service_remove_req(sdp_req_t *req, sdp_buf_t *rsp); + +void register_public_browse_group(void); +void register_server_service(void); +void register_device_id(const uint16_t vendor, const uint16_t product, + const uint16_t version); + +typedef struct { + uint32_t timestamp; + union { + uint16_t maxBytesSent; + uint16_t lastIndexSent; + } cStateValue; +} sdp_cont_state_t; + +#define SDP_CONT_STATE_SIZE (sizeof(uint8_t) + sizeof(sdp_cont_state_t)) + +sdp_buf_t *sdp_get_cached_rsp(sdp_cont_state_t *cstate); +void sdp_cstate_cache_init(void); +void sdp_cstate_clean_buf(void); +uint32_t sdp_cstate_alloc_buf(sdp_buf_t *buf); + +void sdp_svcdb_reset(void); +void sdp_svcdb_collect_all(int sock); +void sdp_svcdb_set_collectable(sdp_record_t *rec, int sock); +void sdp_svcdb_collect(sdp_record_t *rec); +sdp_record_t *sdp_record_find(uint32_t handle); +void sdp_record_add(bdaddr_t *device, sdp_record_t *rec); +int sdp_record_remove(uint32_t handle); +sdp_list_t *sdp_get_record_list(void); +sdp_list_t *sdp_get_access_list(void); +int sdp_check_access(uint32_t handle, bdaddr_t *device); +uint32_t sdp_next_handle(void); + +uint32_t sdp_get_time(); + +#define SDP_SERVER_COMPAT (1 << 0) +#define SDP_SERVER_MASTER (1 << 1) + +int start_sdp_server(uint16_t mtu, const char *did, uint32_t flags); +void stop_sdp_server(void); + +int add_record_to_server(bdaddr_t *src, sdp_record_t *rec); +int remove_record_from_server(uint32_t handle); + +typedef void (*service_classes_callback_t) (const bdaddr_t *bdaddr, uint8_t value); + +uint8_t get_service_classes(const bdaddr_t *bdaddr); +void set_service_classes_callback(service_classes_callback_t callback); +void create_ext_inquiry_response(const char *name, uint8_t *data); diff --git a/sdpd/server.c b/sdpd/server.c new file mode 100644 index 00000000..1524d1c0 --- /dev/null +++ b/sdpd/server.c @@ -0,0 +1,280 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2001-2002 Nokia Corporation + * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> + * Copyright (C) 2002-2008 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 <unistd.h> +#include <stdlib.h> +#include <sys/stat.h> +#include <sys/socket.h> + +#include <bluetooth/bluetooth.h> +#include <bluetooth/l2cap.h> +#include <bluetooth/sdp.h> +#include <bluetooth/sdp_lib.h> + +#include <sys/un.h> +#include <netinet/in.h> + +#include <glib.h> + +#include "logging.h" +#include "sdpd.h" + +static GIOChannel *l2cap_io = NULL, *unix_io = NULL; + +static int l2cap_sock, unix_sock; + +/* + * SDP server initialization on startup includes creating the + * l2cap and unix sockets over which discovery and registration clients + * access us respectively + */ +static int init_server(uint16_t mtu, int master, int compat) +{ + struct l2cap_options opts; + struct sockaddr_l2 l2addr; + struct sockaddr_un unaddr; + socklen_t optlen; + + /* Register the public browse group root */ + register_public_browse_group(); + + /* Register the SDP server's service record */ + register_server_service(); + + /* Create L2CAP socket */ + l2cap_sock = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP); + if (l2cap_sock < 0) { + error("opening L2CAP socket: %s", strerror(errno)); + return -1; + } + + memset(&l2addr, 0, sizeof(l2addr)); + l2addr.l2_family = AF_BLUETOOTH; + bacpy(&l2addr.l2_bdaddr, BDADDR_ANY); + l2addr.l2_psm = htobs(SDP_PSM); + + if (bind(l2cap_sock, (struct sockaddr *) &l2addr, sizeof(l2addr)) < 0) { + error("binding L2CAP socket: %s", strerror(errno)); + return -1; + } + + if (master) { + int opt = L2CAP_LM_MASTER; + if (setsockopt(l2cap_sock, SOL_L2CAP, L2CAP_LM, &opt, sizeof(opt)) < 0) { + error("setsockopt: %s", strerror(errno)); + return -1; + } + } + + if (mtu > 0) { + memset(&opts, 0, sizeof(opts)); + optlen = sizeof(opts); + + if (getsockopt(l2cap_sock, SOL_L2CAP, L2CAP_OPTIONS, &opts, &optlen) < 0) { + error("getsockopt: %s", strerror(errno)); + return -1; + } + + opts.omtu = mtu; + opts.imtu = mtu; + + if (setsockopt(l2cap_sock, SOL_L2CAP, L2CAP_OPTIONS, &opts, sizeof(opts)) < 0) { + error("setsockopt: %s", strerror(errno)); + return -1; + } + } + + listen(l2cap_sock, 5); + + if (!compat) { + unix_sock = -1; + return 0; + } + + /* Create local Unix socket */ + unix_sock = socket(PF_UNIX, SOCK_STREAM, 0); + if (unix_sock < 0) { + error("opening UNIX socket: %s", strerror(errno)); + return -1; + } + + memset(&unaddr, 0, sizeof(unaddr)); + unaddr.sun_family = AF_UNIX; + strcpy(unaddr.sun_path, SDP_UNIX_PATH); + + unlink(unaddr.sun_path); + + if (bind(unix_sock, (struct sockaddr *) &unaddr, sizeof(unaddr)) < 0) { + error("binding UNIX socket: %s", strerror(errno)); + return -1; + } + + listen(unix_sock, 5); + + chmod(SDP_UNIX_PATH, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); + + return 0; +} + +static gboolean io_session_event(GIOChannel *chan, GIOCondition cond, gpointer data) +{ + sdp_pdu_hdr_t hdr; + uint8_t *buf; + int sk, len, size; + + if (cond & G_IO_NVAL) + return FALSE; + + sk = g_io_channel_unix_get_fd(chan); + + if (cond & (G_IO_HUP | G_IO_ERR)) { + sdp_svcdb_collect_all(sk); + return FALSE; + } + + len = recv(sk, &hdr, sizeof(sdp_pdu_hdr_t), MSG_PEEK); + if (len <= 0) { + sdp_svcdb_collect_all(sk); + return FALSE; + } + + size = sizeof(sdp_pdu_hdr_t) + ntohs(hdr.plen); + buf = malloc(size); + if (!buf) + return TRUE; + + len = recv(sk, buf, size, 0); + if (len <= 0) { + sdp_svcdb_collect_all(sk); + return FALSE; + } + + handle_request(sk, buf, len); + + return TRUE; +} + +static gboolean io_accept_event(GIOChannel *chan, GIOCondition cond, gpointer data) +{ + GIOChannel *io; + int nsk; + + if (cond & (G_IO_HUP | G_IO_ERR | G_IO_NVAL)) { + g_io_channel_unref(chan); + return FALSE; + } + + if (data == &l2cap_sock) { + struct sockaddr_l2 addr; + socklen_t len = sizeof(addr); + + nsk = accept(l2cap_sock, (struct sockaddr *) &addr, &len); + } else if (data == &unix_sock) { + struct sockaddr_un addr; + socklen_t len = sizeof(addr); + + nsk = accept(unix_sock, (struct sockaddr *) &addr, &len); + } else + return FALSE; + + if (nsk < 0) { + error("Can't accept connection: %s", strerror(errno)); + return TRUE; + } + + io = g_io_channel_unix_new(nsk); + g_io_channel_set_close_on_unref(io, TRUE); + + g_io_add_watch(io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, + io_session_event, data); + + g_io_channel_unref(io); + + return TRUE; +} + +int start_sdp_server(uint16_t mtu, const char *did, uint32_t flags) +{ + int compat = flags & SDP_SERVER_COMPAT; + int master = flags & SDP_SERVER_MASTER; + + info("Starting SDP server"); + + if (init_server(mtu, master, compat) < 0) { + error("Server initialization failed"); + return -1; + } + + if (did && strlen(did) > 0) { + const char *ptr = did; + uint16_t vid = 0x0000, pid = 0x0000, ver = 0x0000; + + vid = (uint16_t) strtol(ptr, NULL, 16); + ptr = strchr(ptr, ':'); + if (ptr) { + pid = (uint16_t) strtol(ptr + 1, NULL, 16); + ptr = strchr(ptr + 1, ':'); + if (ptr) + ver = (uint16_t) strtol(ptr + 1, NULL, 16); + register_device_id(vid, pid, ver); + } + } + + l2cap_io = g_io_channel_unix_new(l2cap_sock); + g_io_channel_set_close_on_unref(l2cap_io, TRUE); + + g_io_add_watch(l2cap_io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, + io_accept_event, &l2cap_sock); + + if (compat && unix_sock > fileno(stderr)) { + unix_io = g_io_channel_unix_new(unix_sock); + g_io_channel_set_close_on_unref(unix_io, TRUE); + + g_io_add_watch(unix_io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, + io_accept_event, &unix_sock); + } + + return 0; +} + +void stop_sdp_server(void) +{ + info("Stopping SDP server"); + + sdp_svcdb_reset(); + + if (unix_io) + g_io_channel_unref(unix_io); + + if (l2cap_io) + g_io_channel_unref(l2cap_io); +} diff --git a/sdpd/service.c b/sdpd/service.c new file mode 100644 index 00000000..002efc85 --- /dev/null +++ b/sdpd/service.c @@ -0,0 +1,659 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2001-2002 Nokia Corporation + * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> + * Copyright (C) 2002-2008 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 <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" + +static sdp_record_t *server = NULL; + +static uint8_t service_classes = 0x00; +static service_classes_callback_t service_classes_callback = NULL; + +static uint16_t did_vendor = 0x0000; +static uint16_t did_product = 0x0000; +static uint16_t did_version = 0x0000; + +/* + * 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; + +/* + * 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); +} + +static void update_svclass_list(void) +{ + sdp_list_t *list = sdp_get_record_list(); + uint8_t val = 0; + + for (; list; list = list->next) { + sdp_record_t *rec = (sdp_record_t *) list->data; + + if (rec->svclass.type != SDP_UUID16) + continue; + + switch (rec->svclass.value.uuid16) { + case DIALUP_NET_SVCLASS_ID: + case CIP_SVCLASS_ID: + val |= 0x42; /* Telephony & Networking */ + break; + case IRMC_SYNC_SVCLASS_ID: + case OBEX_OBJPUSH_SVCLASS_ID: + case OBEX_FILETRANS_SVCLASS_ID: + case IRMC_SYNC_CMD_SVCLASS_ID: + case PBAP_PSE_SVCLASS_ID: + val |= 0x10; /* Object Transfer */ + break; + case HEADSET_SVCLASS_ID: + case HANDSFREE_SVCLASS_ID: + val |= 0x20; /* Audio */ + break; + case CORDLESS_TELEPHONY_SVCLASS_ID: + case INTERCOM_SVCLASS_ID: + case FAX_SVCLASS_ID: + case SAP_SVCLASS_ID: + val |= 0x40; /* Telephony */ + break; + case AUDIO_SOURCE_SVCLASS_ID: + case VIDEO_SOURCE_SVCLASS_ID: + val |= 0x08; /* Capturing */ + break; + case AUDIO_SINK_SVCLASS_ID: + case VIDEO_SINK_SVCLASS_ID: + val |= 0x04; /* Rendering */ + break; + case PANU_SVCLASS_ID: + case NAP_SVCLASS_ID: + case GN_SVCLASS_ID: + val |= 0x02; /* Networking */ + break; + } + } + + debug("Service classes 0x%02x", val); + + service_classes = val; + + if (service_classes_callback) + service_classes_callback(BDADDR_ANY, val); +} + +uint8_t get_service_classes(const bdaddr_t *bdaddr) +{ + return service_classes; +} + +void set_service_classes_callback(service_classes_callback_t callback) +{ + service_classes_callback = callback; +} + +void create_ext_inquiry_response(const char *name, uint8_t *data) +{ + sdp_list_t *list = sdp_get_record_list(); + uint8_t *ptr = data; + uint16_t uuid[24]; + int i, index = 0; + + if (name) { + int len = strlen(name); + + if (len > 48) { + len = 48; + ptr[1] = 0x08; + } else + ptr[1] = 0x09; + + ptr[0] = len + 1; + + memcpy(ptr + 2, name, len); + + ptr += len + 2; + } + + if (did_vendor != 0x0000) { + uint16_t source = 0x0002; + *ptr++ = 9; + *ptr++ = 11; + *ptr++ = (source & 0x00ff); + *ptr++ = (source & 0xff00) >> 8; + *ptr++ = (did_vendor & 0x00ff); + *ptr++ = (did_vendor & 0xff00) >> 8; + *ptr++ = (did_product & 0x00ff); + *ptr++ = (did_product & 0xff00) >> 8; + *ptr++ = (did_version & 0x00ff); + *ptr++ = (did_version & 0xff00) >> 8; + } + + ptr[1] = 0x03; + + for (; list; list = list->next) { + sdp_record_t *rec = (sdp_record_t *) list->data; + + if (rec->svclass.type != SDP_UUID16) + continue; + + if (rec->svclass.value.uuid16 < 0x1100) + continue; + + if (index > 23) { + ptr[1] = 0x02; + break; + } + + for (i = 0; i < index; i++) + if (uuid[i] == rec->svclass.value.uuid16) + break; + + if (i == index - 1) + continue; + + uuid[index++] = rec->svclass.value.uuid16; + } + + if (index > 0) { + ptr[0] = (index * 2) + 1; + ptr += 2; + + for (i = 0; i < index; i++) { + *ptr++ = (uuid[i] & 0x00ff); + *ptr++ = (uuid[i] & 0xff00) >> 8; + } + } +} + +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 = (void **)malloc(sdpServerVnumEntries * sizeof(void *)); + versionDTDs = (void **)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(); + update_svclass_list(); +} + +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); + + did_vendor = vendor; + did_product = product; + did_version = 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(); + update_svclass_list(); +} + +int add_record_to_server(bdaddr_t *src, sdp_record_t *rec) +{ + sdp_data_t *data; + + if (rec->handle == 0xffffffff) { + rec->handle = sdp_next_handle(); + if (rec->handle < 0x10000) + return -1; + } else { + if (sdp_record_find(rec->handle)) + return -1; + } + + debug("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); + } + + update_db_timestamp(); + update_svclass_list(); + + return 0; +} + +int remove_record_from_server(uint32_t handle) +{ + sdp_record_t *rec; + + debug("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(); + update_svclass_list(); + } + + sdp_record_free(rec); + + return 0; +} + +// FIXME: refactor for server-side +static sdp_record_t *extract_pdu_server(bdaddr_t *device, uint8_t *p, 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_safe(p, bufsize, &dtd, &seqlen); + p += *scanned; + bufsize -= *scanned; + + if (bufsize < sizeof(uint8_t) + sizeof(uint8_t)) { + debug("Unexpected end of packet"); + return NULL; + } + + lookAheadAttrId = ntohs(bt_get_unaligned((uint16_t *) (p + sizeof(uint8_t)))); + + debug("Look ahead attr id : %d", lookAheadAttrId); + + if (lookAheadAttrId == SDP_ATTR_RECORD_HANDLE) { + if (bufsize < (sizeof(uint8_t) * 2) + sizeof(uint16_t) + sizeof(uint32_t)) { + debug("Unexpected end of packet"); + return NULL; + } + 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); + } + } 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)) { + debug("Unexpected end of packet: Terminating extraction of attributes"); + break; + } + + 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_safe(p + attrSize, bufsize - 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; + bufsize -= 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); + 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(); + update_svclass_list(); + + /* 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); + int bufsize = req->len - 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); + bufsize -= sizeof(uint32_t); + + orec = sdp_record_find(handle); + + debug("SvcRecOld: %p", orec); + + if (orec) { + sdp_record_t *nrec = extract_pdu_server(BDADDR_ANY, p, bufsize, handle, &scanned); + if (nrec && handle == nrec->handle) { + update_db_timestamp(); + update_svclass_list(); + } 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(); + update_svclass_list(); + } + } 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; +} diff --git a/sdpd/servicedb.c b/sdpd/servicedb.c new file mode 100644 index 00000000..6cc34bd3 --- /dev/null +++ b/sdpd/servicedb.c @@ -0,0 +1,304 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2001-2002 Nokia Corporation + * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> + * Copyright (C) 2002-2008 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 <sys/socket.h> + +#include <bluetooth/bluetooth.h> +#include <bluetooth/l2cap.h> +#include <bluetooth/sdp.h> +#include <bluetooth/sdp_lib.h> + +#include "sdpd.h" +#include "logging.h" + +static sdp_list_t *service_db; +static sdp_list_t *access_db; + +typedef struct { + uint32_t handle; + bdaddr_t device; +} sdp_access_t; + +/* + * Ordering function called when inserting a service record. + * The service repository is a linked list in sorted order + * and the service record handle is the sort key + */ +static int record_sort(const void *r1, const void *r2) +{ + const sdp_record_t *rec1 = (const sdp_record_t *) r1; + const sdp_record_t *rec2 = (const sdp_record_t *) r2; + + if (!rec1 || !rec2) { + error("NULL RECORD LIST FATAL"); + return -1; + } + + return rec1->handle - rec2->handle; +} + +static int access_sort(const void *r1, const void *r2) +{ + const sdp_access_t *rec1 = (const sdp_access_t *) r1; + const sdp_access_t *rec2 = (const sdp_access_t *) r2; + + if (!rec1 || !rec2) { + error("NULL RECORD LIST FATAL"); + return -1; + } + + return rec1->handle - rec2->handle; +} + +static void access_free(void *p) +{ + free(p); +} + +/* + * Reset the service repository by deleting its contents + */ +void sdp_svcdb_reset() +{ + sdp_list_free(service_db, (sdp_free_func_t) sdp_record_free); + sdp_list_free(access_db, access_free); +} + +typedef struct _indexed { + int sock; + sdp_record_t *record; +} sdp_indexed_t; + +static sdp_list_t *socket_index; + +/* + * collect all services registered over this socket + */ +void sdp_svcdb_collect_all(int sock) +{ + sdp_list_t *p, *q; + + for (p = socket_index, q = 0; p; ) { + sdp_indexed_t *item = (sdp_indexed_t *) p->data; + if (item->sock == sock) { + sdp_list_t *next = p->next; + sdp_record_remove(item->record->handle); + sdp_record_free(item->record); + free(item); + if (q) + q->next = next; + else + socket_index = next; + free(p); + p = next; + } else if (item->sock > sock) + return; + else { + q = p; + p = p->next; + } + } +} + +void sdp_svcdb_collect(sdp_record_t *rec) +{ + sdp_list_t *p, *q; + + for (p = socket_index, q = 0; p; q = p, p = p->next) { + sdp_indexed_t *item = (sdp_indexed_t *) p->data; + if (rec == item->record) { + free(item); + if (q) + q->next = p->next; + else + socket_index = p->next; + free(p); + return; + } + } +} + +static int compare_indices(const void *i1, const void *i2) +{ + const sdp_indexed_t *s1 = (const sdp_indexed_t *) i1; + const sdp_indexed_t *s2 = (const sdp_indexed_t *) i2; + return s1->sock - s2->sock; +} + +void sdp_svcdb_set_collectable(sdp_record_t *record, int sock) +{ + sdp_indexed_t *item = malloc(sizeof(sdp_indexed_t)); + item->sock = sock; + item->record = record; + socket_index = sdp_list_insert_sorted(socket_index, item, compare_indices); +} + +/* + * Add a service record to the repository + */ +void sdp_record_add(bdaddr_t *device, sdp_record_t *rec) +{ + sdp_access_t *dev; + + debug("Adding rec : 0x%lx", (long) rec); + debug("with handle : 0x%x", rec->handle); + + service_db = sdp_list_insert_sorted(service_db, rec, record_sort); + + dev = malloc(sizeof(*dev)); + if (!dev) + return; + + bacpy(&dev->device, device); + dev->handle = rec->handle; + + access_db = sdp_list_insert_sorted(access_db, dev, access_sort); +} + +static sdp_list_t *record_locate(uint32_t handle) +{ + if (service_db) { + sdp_list_t *p; + sdp_record_t r; + + r.handle = handle; + p = sdp_list_find(service_db, &r, record_sort); + return p; + } + + debug("Could not find svcRec for : 0x%x", handle); + return NULL; +} + +static sdp_list_t *access_locate(uint32_t handle) +{ + if (access_db) { + sdp_list_t *p; + sdp_access_t a; + + a.handle = handle; + p = sdp_list_find(access_db, &a, access_sort); + return p; + } + + debug("Could not find access data for : 0x%x", handle); + return NULL; +} + +/* + * Given a service record handle, find the record associated with it. + */ +sdp_record_t *sdp_record_find(uint32_t handle) +{ + sdp_list_t *p = record_locate(handle); + + if (!p) { + debug("Couldn't find record for : 0x%x", handle); + return 0; + } + + return (sdp_record_t *) p->data; +} + +/* + * Given a service record handle, remove its record from the repository + */ +int sdp_record_remove(uint32_t handle) +{ + sdp_list_t *p = record_locate(handle); + sdp_record_t *r; + sdp_access_t *a; + + if (!p) { + error("Remove : Couldn't find record for : 0x%x", handle); + return -1; + } + + r = (sdp_record_t *) p->data; + if (r) + service_db = sdp_list_remove(service_db, r); + + p = access_locate(handle); + if (p) { + a = (sdp_access_t *) p->data; + if (a) { + access_db = sdp_list_remove(access_db, a); + access_free(a); + } + } + + return 0; +} + +/* + * Return a pointer to the linked list containing the records in sorted order + */ +sdp_list_t *sdp_get_record_list(void) +{ + return service_db; +} + +sdp_list_t *sdp_get_access_list(void) +{ + return access_db; +} + +int sdp_check_access(uint32_t handle, bdaddr_t *device) +{ + sdp_list_t *p = access_locate(handle); + sdp_access_t *a; + + if (!p) + return 1; + + a = (sdp_access_t *) p->data; + if (!a) + return 1; + + if (bacmp(&a->device, device) && + bacmp(&a->device, BDADDR_ANY) && + bacmp(device, BDADDR_ANY)) + return 0; + + return 1; +} + +uint32_t sdp_next_handle(void) +{ + uint32_t handle = 0x10000; + + while (sdp_record_find(handle)) + handle++; + + return handle; +} |