usr.sbin/sdpd/ssar.c

   1 /* $NetBSD: ssar.c,v 1.2 2007/11/09 20:08:41 plunky Exp $ */
   2 /* $DragonFly: src/usr.sbin/sdpd/ssar.c,v 1.2 2008/05/19 10:19:49 corecode Exp $ */
   3
   4 /*
   5  * ssar.c
   6  *
   7  * Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com>
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $Id: ssar.c,v 1.2 2007/11/30 07:39:37 griffin Exp $
  32  * $FreeBSD: src/usr.sbin/bluetooth/sdpd/ssar.c,v 1.2 2005/01/05 18:37:37 emax Exp $
  33  */
  34
  35 #include <sys/queue.h>
  36 #include <sys/select.h>
  37 #include <bluetooth.h>
  38 #include <sdp.h>
  39 #include <string.h>
  40 #include "profile.h"
  41 #include "provider.h"
  42 #include "server.h"
  43 #include "uuid-private.h"
  44
  45 /*
  46  * Prepare SDP Service Search Attribute Response
  47  */
  48
  49 int32_t
  50 server_prepare_service_search_attribute_response(server_p srv, int32_t fd)
  51 {
  52         uint8_t const   *req = srv->req + sizeof(sdp_pdu_t);
  53         uint8_t const   *req_end = req + ((sdp_pdu_p)(srv->req))->len;
  54         uint8_t         *rsp = srv->fdidx[fd].rsp;
  55         uint8_t const   *rsp_end = rsp + L2CAP_MTU_MAXIMUM;
  56
  57         uint8_t const   *aidptr = NULL;
  58
  59         provider_t      *provider = NULL;
  60         int32_t          type, rsp_limit, ucount, aidlen, cslen, cs;
  61         uint128_t        ulist[12];
  62
  63         /*
  64          * Minimal Service Search Attribute Request request
  65          *
  66          * seq8 len8            - 2 bytes
  67          *      uuid16 value16  - 3 bytes ServiceSearchPattern
  68          * value16              - 2 bytes MaximumAttributeByteCount
  69          * seq8 len8            - 2 bytes
  70          *      uint16 value16  - 3 bytes AttributeIDList
  71          * value8               - 1 byte  ContinuationState
  72          */
  73
  74         /* Get ServiceSearchPattern */
  75         ucount = server_get_service_search_pattern(&req, req_end, ulist);
  76         if (ucount < 1 || ucount > 12)
  77                 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
  78
  79         /* Get MaximumAttributeByteCount */
  80         if (req + 2 > req_end)
  81                 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
  82
  83         SDP_GET16(rsp_limit, req);
  84         if (rsp_limit <= 0)
  85                 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
  86
  87         /* Get size of AttributeIDList */
  88         if (req + 1 > req_end)
  89                 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
  90
  91         aidlen = 0;
  92         SDP_GET8(type, req);
  93         switch (type) {
  94         case SDP_DATA_SEQ8:
  95                 if (req + 1 > req_end)
  96                         return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
  97
  98                 SDP_GET8(aidlen, req);
  99                 break;
 100
 101         case SDP_DATA_SEQ16:
 102                 if (req + 2 > req_end)
 103                         return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
 104
 105                 SDP_GET16(aidlen, req);
 106                 break;
 107
 108         case SDP_DATA_SEQ32:
 109                 if (req + 4 > req_end)
 110                         return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
 111
 112                 SDP_GET32(aidlen, req);
 113                 break;
 114         }
 115         if (aidlen <= 0)
 116                 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
 117
 118         aidptr = req;
 119         req += aidlen;
 120
 121         /* Get ContinuationState */
 122         if (req + 1 > req_end)
 123                 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
 124
 125         SDP_GET8(cslen, req);
 126         if (cslen == 2 && req + 2 == req_end)
 127                 SDP_GET16(cs, req);
 128         else if (cslen == 0 && req == req_end)
 129                 cs = 0;
 130         else
 131                 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
 132
 133         /* Process the request. First, check continuation state */
 134         if (srv->fdidx[fd].rsp_cs != cs)
 135                 return (SDP_ERROR_CODE_INVALID_CONTINUATION_STATE);
 136         if (srv->fdidx[fd].rsp_size > 0)
 137                 return (0);
 138
 139         /*
 140          * Service Search Attribute Response format
 141          *
 142          * value16              - 2 bytes  AttributeListByteCount (not incl.)
 143          * seq8 len16           - 3 bytes
 144          *      attr list       - 3+ bytes AttributeLists
 145          *      [ attr list ]
 146          */
 147
 148         rsp += 3;       /* leave space for sequence header */
 149
 150         for (provider = provider_get_first();
 151              provider != NULL;
 152              provider = provider_get_next(provider)) {
 153                 if (!provider_match_bdaddr(provider, &srv->req_sa.bt_bdaddr))
 154                         continue;
 155
 156                 if (!provider_match_uuid(provider, ulist, ucount))
 157                         continue;
 158
 159                 cs = server_prepare_attr_list(provider,
 160                         aidptr, aidptr + aidlen, rsp, rsp_end);
 161                 if (cs < 0)
 162                         return (SDP_ERROR_CODE_INSUFFICIENT_RESOURCES);
 163
 164                 rsp += cs;
 165         }
 166
 167         /* Set reply size (not counting PDU header and continuation state) */
 168         srv->fdidx[fd].rsp_limit = srv->fdidx[fd].omtu - sizeof(sdp_pdu_t) - 2;
 169         if (srv->fdidx[fd].rsp_limit > rsp_limit)
 170                 srv->fdidx[fd].rsp_limit = rsp_limit;
 171
 172         srv->fdidx[fd].rsp_size = rsp - srv->fdidx[fd].rsp;
 173         srv->fdidx[fd].rsp_cs = 0;
 174
 175         /* Fix AttributeLists sequence header */
 176         rsp = srv->fdidx[fd].rsp;
 177         SDP_PUT8(SDP_DATA_SEQ16, rsp);
 178         SDP_PUT16(srv->fdidx[fd].rsp_size - 3, rsp);
 179
 180         return (0);
 181 }