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283 lines
7.3 KiB
C
283 lines
7.3 KiB
C
/*
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* ssr.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: ssr.c,v 1.5 2004/01/13 01:54:39 max Exp $
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* $FreeBSD$
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*/
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#include <sys/queue.h>
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#include <sys/uio.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <assert.h>
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#include <bluetooth.h>
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#include <errno.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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/*
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* Prepare SDP Service Search Response
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*/
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int32_t
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server_prepare_service_search_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 *ptr = NULL;
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provider_t *provider = NULL;
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int32_t type, ssplen, rsp_limit, rcount, cslen, cs;
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uint128_t uuid, puuid;
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/*
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* Minimal SDP Service Search 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 MaximumServiceRecordCount
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* value8 - 1 byte ContinuationState
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*/
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if (req_end - req < 8)
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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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ptr = (uint8_t *) req + ssplen;
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/* Get MaximumServiceRecordCount */
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if (ptr + 2 > req_end)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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SDP_GET16(rsp_limit, ptr);
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if (rsp_limit <= 0)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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/* Get ContinuationState */
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if (ptr + 1 > req_end)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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SDP_GET8(cslen, ptr);
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if (cslen != 0) {
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if (cslen != 2 || req_end - ptr != 2)
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return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
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SDP_GET16(cs, ptr);
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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 Response format
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*
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* value16 - 2 bytes TotalServiceRecordCount (not incl.)
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* value16 - 2 bytes CurrentServiceRecordCount (not incl.)
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* value32 - 4 bytes handle
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* [ value32 ]
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*
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* Calculate how many record handles we can fit
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* in our reply buffer and adjust rlimit.
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*/
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ptr = rsp;
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rcount = (rsp_end - ptr) / 4;
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if (rcount < rsp_limit)
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rsp_limit = rcount;
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/* Look for the record handles */
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for (rcount = 0; ssplen > 0 && rcount < rsp_limit; ) {
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SDP_GET8(type, req);
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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] = *req ++;
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uuid.b[3] = *req ++;
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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] = *req ++;
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uuid.b[1] = *req ++;
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uuid.b[2] = *req ++;
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uuid.b[3] = *req ++;
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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, req, 16);
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req += 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 && rcount < rsp_limit;
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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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SDP_PUT32(provider->handle, ptr);
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rcount ++;
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}
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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) - 4;
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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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return (0);
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}
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/*
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* Send SDP Service Search Response
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*/
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int32_t
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server_send_service_search_response(server_p srv, int32_t fd)
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{
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uint8_t *rsp = srv->fdidx[fd].rsp + srv->fdidx[fd].rsp_cs;
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uint8_t *rsp_end = srv->fdidx[fd].rsp + srv->fdidx[fd].rsp_size;
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struct iovec iov[4];
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sdp_pdu_t pdu;
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uint16_t rcounts[2];
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uint8_t cs[3];
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int32_t size;
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/* First update continuation state (assume we will send all data) */
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size = rsp_end - rsp;
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srv->fdidx[fd].rsp_cs += size;
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if (size + 1 > srv->fdidx[fd].rsp_limit) {
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/*
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* We need to split out response. Add 3 more bytes for the
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* continuation state and move rsp_end and rsp_cs backwards.
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*/
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while ((rsp_end - rsp) + 3 > srv->fdidx[fd].rsp_limit) {
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rsp_end -= 4;
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srv->fdidx[fd].rsp_cs -= 4;
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}
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cs[0] = 2;
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cs[1] = srv->fdidx[fd].rsp_cs >> 8;
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cs[2] = srv->fdidx[fd].rsp_cs & 0xff;
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} else
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cs[0] = 0;
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assert(rsp_end >= rsp);
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rcounts[0] = srv->fdidx[fd].rsp_size / 4; /* TotalServiceRecordCount */
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rcounts[1] = (rsp_end - rsp) / 4; /* CurrentServiceRecordCount */
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pdu.pid = SDP_PDU_SERVICE_SEARCH_RESPONSE;
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pdu.tid = ((sdp_pdu_p)(srv->req))->tid;
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pdu.len = htons(sizeof(rcounts) + rcounts[1] * 4 + 1 + cs[0]);
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rcounts[0] = htons(rcounts[0]);
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rcounts[1] = htons(rcounts[1]);
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iov[0].iov_base = &pdu;
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iov[0].iov_len = sizeof(pdu);
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iov[1].iov_base = rcounts;
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iov[1].iov_len = sizeof(rcounts);
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iov[2].iov_base = rsp;
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iov[2].iov_len = rsp_end - rsp;
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iov[3].iov_base = cs;
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iov[3].iov_len = 1 + cs[0];
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do {
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size = writev(fd, (struct iovec const *) &iov, sizeof(iov)/sizeof(iov[0]));
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} while (size < 0 && errno == EINTR);
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/* Check if we have sent (or failed to sent) last response chunk */
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if (srv->fdidx[fd].rsp_cs == srv->fdidx[fd].rsp_size) {
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srv->fdidx[fd].rsp_cs = 0;
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srv->fdidx[fd].rsp_size = 0;
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srv->fdidx[fd].rsp_limit = 0;
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}
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return ((size < 0)? errno : 0);
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}
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