/* $NetBSD: ssar.c,v 1.2 2007/11/09 20:08:41 plunky Exp $ */
/* $DragonFly: src/usr.sbin/sdpd/ssar.c,v 1.2 2008/05/19 10:19:49 corecode Exp $ */

/*
 * ssar.c
 *
 * Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id: ssar.c,v 1.2 2007/11/30 07:39:37 griffin Exp $
 * $FreeBSD: src/usr.sbin/bluetooth/sdpd/ssar.c,v 1.2 2005/01/05 18:37:37 emax Exp $
 */

#include <sys/queue.h>
#include <sys/select.h>
#include <bluetooth.h>
#include <sdp.h>
#include <string.h>
#include "profile.h"
#include "provider.h"
#include "server.h"
#include "uuid-private.h"

/*
 * Prepare SDP Service Search Attribute Response
 */

int32_t
server_prepare_service_search_attribute_response(server_p srv, int32_t fd)
{
        uint8_t const   *req = srv->req + sizeof(sdp_pdu_t);
        uint8_t const   *req_end = req + ((sdp_pdu_p)(srv->req))->len;
        uint8_t         *rsp = srv->fdidx[fd].rsp;
        uint8_t const   *rsp_end = rsp + L2CAP_MTU_MAXIMUM;

        uint8_t const   *aidptr = NULL;

        provider_t      *provider = NULL;
        int32_t          type, rsp_limit, ucount, aidlen, cslen, cs;
        uint128_t        ulist[12];

        /*
         * Minimal Service Search Attribute Request request
         *
         * seq8 len8            - 2 bytes
         *      uuid16 value16  - 3 bytes ServiceSearchPattern
         * value16              - 2 bytes MaximumAttributeByteCount
         * seq8 len8            - 2 bytes
         *      uint16 value16  - 3 bytes AttributeIDList
         * value8               - 1 byte  ContinuationState
         */

        /* Get ServiceSearchPattern */
        ucount = server_get_service_search_pattern(&req, req_end, ulist);
        if (ucount < 1 || ucount > 12)
                return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

        /* Get MaximumAttributeByteCount */
        if (req + 2 > req_end)
                return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

        SDP_GET16(rsp_limit, req);
        if (rsp_limit <= 0)
                return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

        /* Get size of AttributeIDList */
        if (req + 1 > req_end)
                return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

        aidlen = 0;
        SDP_GET8(type, req);
        switch (type) {
        case SDP_DATA_SEQ8:
                if (req + 1 > req_end)
                        return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

                SDP_GET8(aidlen, req);
                break;

        case SDP_DATA_SEQ16:
                if (req + 2 > req_end)
                        return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

                SDP_GET16(aidlen, req);
                break;

        case SDP_DATA_SEQ32:
                if (req + 4 > req_end)
                        return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

                SDP_GET32(aidlen, req);
                break;
        }
        if (aidlen <= 0)
                return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

        aidptr = req;
        req += aidlen;

        /* Get ContinuationState */
        if (req + 1 > req_end)
                return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

        SDP_GET8(cslen, req);
        if (cslen == 2 && req + 2 == req_end)
                SDP_GET16(cs, req);
        else if (cslen == 0 && req == req_end)
                cs = 0;
        else
                return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);

        /* Process the request. First, check continuation state */
        if (srv->fdidx[fd].rsp_cs != cs)
                return (SDP_ERROR_CODE_INVALID_CONTINUATION_STATE);
        if (srv->fdidx[fd].rsp_size > 0)
                return (0);

        /*
         * Service Search Attribute Response format
         *
         * value16              - 2 bytes  AttributeListByteCount (not incl.)
         * seq8 len16           - 3 bytes
         *      attr list       - 3+ bytes AttributeLists
         *      [ attr list ]
         */

        rsp += 3;       /* leave space for sequence header */

        for (provider = provider_get_first();
             provider != NULL;
             provider = provider_get_next(provider)) {
                if (!provider_match_bdaddr(provider, &srv->req_sa.bt_bdaddr))
                        continue;

                if (!provider_match_uuid(provider, ulist, ucount))
                        continue;

                cs = server_prepare_attr_list(provider,
                        aidptr, aidptr + aidlen, rsp, rsp_end);
                if (cs < 0)
                        return (SDP_ERROR_CODE_INSUFFICIENT_RESOURCES);

                rsp += cs;
        }

        /* Set reply size (not counting PDU header and continuation state) */
        srv->fdidx[fd].rsp_limit = srv->fdidx[fd].omtu - sizeof(sdp_pdu_t) - 2;
        if (srv->fdidx[fd].rsp_limit > rsp_limit)
                srv->fdidx[fd].rsp_limit = rsp_limit;

        srv->fdidx[fd].rsp_size = rsp - srv->fdidx[fd].rsp;
        srv->fdidx[fd].rsp_cs = 0;

        /* Fix AttributeLists sequence header */
        rsp = srv->fdidx[fd].rsp;
        SDP_PUT8(SDP_DATA_SEQ16, rsp);
        SDP_PUT16(srv->fdidx[fd].rsp_size - 3, rsp);

        return (0);
}