254 lines
6.5 KiB
C
254 lines
6.5 KiB
C
/*
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* ssar.c
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*
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* Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: ssar.c,v 1.4 2004/01/12 22:54:31 max Exp $
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* $FreeBSD$
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*/
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#include <sys/queue.h>
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#define L2CAP_SOCKET_CHECKED
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#include <bluetooth.h>
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#include <sdp.h>
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#include <string.h>
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#include "profile.h"
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#include "provider.h"
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#include "server.h"
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#include "uuid-private.h"
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/* from sar.c */
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int32_t server_prepare_attr_list(provider_p const provider,
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uint8_t const *req, uint8_t const * const req_end,
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uint8_t *rsp, uint8_t const * const rsp_end);
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/*
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* Prepare SDP Service Search Attribute Response
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*/
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int32_t
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server_prepare_service_search_attribute_response(server_p srv, int32_t fd)
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{
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uint8_t const *req = srv->req + sizeof(sdp_pdu_t);
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uint8_t const *req_end = req + ((sdp_pdu_p)(srv->req))->len;
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uint8_t *rsp = srv->fdidx[fd].rsp;
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uint8_t const *rsp_end = rsp + NG_L2CAP_MTU_MAXIMUM;
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uint8_t const *sspptr = NULL, *aidptr = NULL;
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uint8_t *ptr = NULL;
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provider_t *provider = NULL;
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int32_t type, rsp_limit, ssplen, aidlen, cslen, cs;
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uint128_t uuid, puuid;
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/*
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* Minimal Service Search Attribute Request request
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*
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* seq8 len8 - 2 bytes
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* uuid16 value16 - 3 bytes ServiceSearchPattern
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* value16 - 2 bytes MaximumAttributeByteCount
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* seq8 len8 - 2 bytes
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* uint16 value16 - 3 bytes AttributeIDList
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* value8 - 1 byte ContinuationState
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*/
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if (req_end - req < 13)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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/* Get size of ServiceSearchPattern */
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ssplen = 0;
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SDP_GET8(type, req);
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switch (type) {
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case SDP_DATA_SEQ8:
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SDP_GET8(ssplen, req);
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break;
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case SDP_DATA_SEQ16:
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SDP_GET16(ssplen, req);
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break;
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case SDP_DATA_SEQ32:
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SDP_GET32(ssplen, req);
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break;
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}
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if (ssplen <= 0)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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sspptr = req;
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req += ssplen;
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/* Get MaximumAttributeByteCount */
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if (req + 2 > req_end)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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SDP_GET16(rsp_limit, req);
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if (rsp_limit <= 0)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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/* Get size of AttributeIDList */
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if (req + 1 > req_end)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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aidlen = 0;
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SDP_GET8(type, req);
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switch (type) {
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case SDP_DATA_SEQ8:
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if (req + 1 > req_end)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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SDP_GET8(aidlen, req);
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break;
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case SDP_DATA_SEQ16:
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if (req + 2 > req_end)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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SDP_GET16(aidlen, req);
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break;
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case SDP_DATA_SEQ32:
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if (req + 4 > req_end)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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SDP_GET32(aidlen, req);
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break;
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}
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if (aidlen <= 0)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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aidptr = req;
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req += aidlen;
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/* Get ContinuationState */
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if (req + 1 > req_end)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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SDP_GET8(cslen, req);
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if (cslen != 0) {
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if (cslen != 2 || req_end - req != 2)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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SDP_GET16(cs, req);
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} else
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cs = 0;
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/* Process the request. First, check continuation state */
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if (srv->fdidx[fd].rsp_cs != cs)
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return (SDP_ERROR_CODE_INVALID_CONTINUATION_STATE);
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if (srv->fdidx[fd].rsp_size > 0)
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return (0);
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/*
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* Service Search Attribute Response format
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*
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* value16 - 2 bytes AttributeListByteCount (not incl.)
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* seq8 len16 - 3 bytes
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* attr list - 3+ bytes AttributeLists
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* [ attr list ]
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*/
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ptr = rsp + 3;
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while (ssplen > 0) {
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SDP_GET8(type, sspptr);
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ssplen --;
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switch (type) {
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case SDP_DATA_UUID16:
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if (ssplen < 2)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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memcpy(&uuid, &uuid_base, sizeof(uuid));
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uuid.b[2] = *sspptr ++;
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uuid.b[3] = *sspptr ++;
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ssplen -= 2;
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break;
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case SDP_DATA_UUID32:
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if (ssplen < 4)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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memcpy(&uuid, &uuid_base, sizeof(uuid));
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uuid.b[0] = *sspptr ++;
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uuid.b[1] = *sspptr ++;
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uuid.b[2] = *sspptr ++;
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uuid.b[3] = *sspptr ++;
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ssplen -= 4;
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break;
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case SDP_DATA_UUID128:
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if (ssplen < 16)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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memcpy(uuid.b, sspptr, 16);
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sspptr += 16;
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ssplen -= 16;
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break;
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default:
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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/* NOT REACHED */
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}
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for (provider = provider_get_first();
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provider != NULL;
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provider = provider_get_next(provider)) {
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if (!provider_match_bdaddr(provider, &srv->req_sa.l2cap_bdaddr))
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continue;
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memcpy(&puuid, &uuid_base, sizeof(puuid));
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puuid.b[2] = provider->profile->uuid >> 8;
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puuid.b[3] = provider->profile->uuid;
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if (memcmp(&uuid, &puuid, sizeof(uuid)) != 0 &&
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memcmp(&uuid, &uuid_public_browse_group, sizeof(uuid)) != 0)
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continue;
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cs = server_prepare_attr_list(provider,
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aidptr, aidptr + aidlen, ptr, rsp_end);
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if (cs < 0)
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return (SDP_ERROR_CODE_INSUFFICIENT_RESOURCES);
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ptr += cs;
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}
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}
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/* Set reply size (not counting PDU header and continuation state) */
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srv->fdidx[fd].rsp_limit = srv->fdidx[fd].omtu - sizeof(sdp_pdu_t) - 2;
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if (srv->fdidx[fd].rsp_limit > rsp_limit)
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srv->fdidx[fd].rsp_limit = rsp_limit;
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srv->fdidx[fd].rsp_size = ptr - rsp;
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srv->fdidx[fd].rsp_cs = 0;
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/* Fix AttributeLists sequence header */
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ptr = rsp;
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SDP_PUT8(SDP_DATA_SEQ16, ptr);
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SDP_PUT16(srv->fdidx[fd].rsp_size - 3, ptr);
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return (0);
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}
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