1 /* $NetBSD: sar.c,v 1.1 2006/06/19 15:44:56 gdamore Exp $ */
2 /* $DragonFly: src/usr.sbin/sdpd/sar.c,v 1.1 2008/01/06 21:51:30 hasso Exp $ */
7 * Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
31 * $Id: sar.c,v 1.2 2007/11/30 07:39:37 griffin Exp $
32 * $FreeBSD: src/usr.sbin/bluetooth/sdpd/sar.c,v 1.2 2004/02/26 20:44:55 emax Exp $
35 #include <sys/queue.h>
37 #include <netinet/in.h>
38 #include <arpa/inet.h>
40 #include <bluetooth.h>
43 #include <stdio.h> /* for NULL */
49 * Prepare SDP attr/value pair. Check if profile implements the attribute
50 * and if so call the attribute value function.
52 * uint16 value16 - 3 bytes (attribute)
53 * value - N bytes (value)
57 server_prepare_attr_value_pair(
58 provider_p
const provider
, uint16_t attr
,
59 uint8_t *buf
, uint8_t const * const eob
)
61 profile_attr_create_p cf
= profile_get_attr(provider
->profile
, attr
);
65 return (0); /* no attribute */
70 SDP_PUT8(SDP_DATA_UINT16
, buf
);
73 len
= cf(buf
, eob
, (uint8_t const *) provider
, sizeof(*provider
));
81 * seq16 value16 - 3 bytes
82 * attr value - 3+ bytes
87 server_prepare_attr_list(provider_p
const provider
,
88 uint8_t const *req
, uint8_t const * const req_end
,
89 uint8_t *rsp
, uint8_t const * const rsp_end
)
91 uint8_t *ptr
= rsp
+ 3;
92 int32_t type
, hi
, lo
, len
;
97 while (req
< req_end
) {
101 case SDP_DATA_UINT16
:
102 if (req
+ 2 > req_end
)
109 case SDP_DATA_UINT32
:
110 if (req
+ 4 > req_end
)
122 for (; lo
<= hi
; lo
++) {
123 len
= server_prepare_attr_value_pair(provider
, lo
, ptr
, rsp_end
);
131 len
= ptr
- rsp
; /* we put this much bytes in rsp */
133 /* Fix SEQ16 header for the rsp */
134 SDP_PUT8(SDP_DATA_SEQ16
, rsp
);
135 SDP_PUT16(len
- 3, rsp
);
141 * Prepare SDP Service Attribute Response
145 server_prepare_service_attribute_response(server_p srv
, int32_t fd
)
147 uint8_t const *req
= srv
->req
+ sizeof(sdp_pdu_t
);
148 uint8_t const *req_end
= req
+ ((sdp_pdu_p
)(srv
->req
))->len
;
149 uint8_t *rsp
= srv
->fdidx
[fd
].rsp
;
150 uint8_t const *rsp_end
= rsp
+ L2CAP_MTU_MAXIMUM
;
152 uint8_t const *ptr
= NULL
;
153 provider_t
*provider
= NULL
;
155 int32_t type
, rsp_limit
, aidlen
, cslen
, cs
;
158 * Minimal Service Attribute Request request
160 * value32 - 4 bytes ServiceRecordHandle
161 * value16 - 2 bytes MaximumAttributeByteCount
162 * seq8 len8 - 2 bytes
163 * uint16 value16 - 3 bytes AttributeIDList
164 * value8 - 1 byte ContinuationState
167 if (req_end
- req
< 12)
168 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX
);
170 /* Get ServiceRecordHandle and MaximumAttributeByteCount */
171 SDP_GET32(handle
, req
);
172 SDP_GET16(rsp_limit
, req
);
174 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX
);
176 /* Get size of AttributeIDList */
181 SDP_GET8(aidlen
, req
);
185 SDP_GET16(aidlen
, req
);
189 SDP_GET32(aidlen
, req
);
193 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX
);
195 ptr
= (uint8_t const *) req
+ aidlen
;
197 /* Get ContinuationState */
198 if (ptr
+ 1 > req_end
)
199 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX
);
201 SDP_GET8(cslen
, ptr
);
203 if (cslen
!= 2 || req_end
- ptr
!= 2)
204 return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX
);
210 /* Process the request. First, check continuation state */
211 if (srv
->fdidx
[fd
].rsp_cs
!= cs
)
212 return (SDP_ERROR_CODE_INVALID_CONTINUATION_STATE
);
213 if (srv
->fdidx
[fd
].rsp_size
> 0)
216 /* Lookup record handle */
217 if ((provider
= provider_by_handle(handle
)) == NULL
)
218 return (SDP_ERROR_CODE_INVALID_SERVICE_RECORD_HANDLE
);
221 * Service Attribute Response format
223 * value16 - 2 bytes AttributeListByteCount (not incl.)
224 * seq8 len16 - 3 bytes
225 * attr value - 3+ bytes AttributeList
229 cs
= server_prepare_attr_list(provider
, req
, req
+aidlen
, rsp
, rsp_end
);
231 return (SDP_ERROR_CODE_INSUFFICIENT_RESOURCES
);
233 /* Set reply size (not counting PDU header and continuation state) */
234 srv
->fdidx
[fd
].rsp_limit
= srv
->fdidx
[fd
].omtu
- sizeof(sdp_pdu_t
) - 2;
235 if (srv
->fdidx
[fd
].rsp_limit
> rsp_limit
)
236 srv
->fdidx
[fd
].rsp_limit
= rsp_limit
;
238 srv
->fdidx
[fd
].rsp_size
= cs
;
239 srv
->fdidx
[fd
].rsp_cs
= 0;
245 * Send SDP Service [Search] Attribute Response
249 server_send_service_attribute_response(server_p srv
, int32_t fd
)
251 uint8_t *rsp
= srv
->fdidx
[fd
].rsp
+ srv
->fdidx
[fd
].rsp_cs
;
252 uint8_t *rsp_end
= srv
->fdidx
[fd
].rsp
+ srv
->fdidx
[fd
].rsp_size
;
260 /* First update continuation state (assume we will send all data) */
261 size
= rsp_end
- rsp
;
262 srv
->fdidx
[fd
].rsp_cs
+= size
;
264 if (size
+ 1 > srv
->fdidx
[fd
].rsp_limit
) {
266 * We need to split out response. Add 3 more bytes for the
267 * continuation state and move rsp_end and rsp_cs backwards.
270 while ((rsp_end
- rsp
) + 3 > srv
->fdidx
[fd
].rsp_limit
) {
272 srv
->fdidx
[fd
].rsp_cs
--;
276 cs
[1] = srv
->fdidx
[fd
].rsp_cs
>> 8;
277 cs
[2] = srv
->fdidx
[fd
].rsp_cs
& 0xff;
281 assert(rsp_end
>= rsp
);
283 bcount
= rsp_end
- rsp
;
285 if (((sdp_pdu_p
)(srv
->req
))->pid
== SDP_PDU_SERVICE_ATTRIBUTE_REQUEST
)
286 pdu
.pid
= SDP_PDU_SERVICE_ATTRIBUTE_RESPONSE
;
288 pdu
.pid
= SDP_PDU_SERVICE_SEARCH_ATTRIBUTE_RESPONSE
;
290 pdu
.tid
= ((sdp_pdu_p
)(srv
->req
))->tid
;
291 pdu
.len
= htons(sizeof(bcount
) + bcount
+ 1 + cs
[0]);
293 bcount
= htons(bcount
);
295 iov
[0].iov_base
= &pdu
;
296 iov
[0].iov_len
= sizeof(pdu
);
298 iov
[1].iov_base
= &bcount
;
299 iov
[1].iov_len
= sizeof(bcount
);
301 iov
[2].iov_base
= rsp
;
302 iov
[2].iov_len
= rsp_end
- rsp
;
304 iov
[3].iov_base
= cs
;
305 iov
[3].iov_len
= 1 + cs
[0];
308 size
= writev(fd
, (struct iovec
const *) &iov
, sizeof(iov
)/sizeof(iov
[0]));
309 } while (size
< 0 && errno
== EINTR
);
311 /* Check if we have sent (or failed to sent) last response chunk */
312 if (srv
->fdidx
[fd
].rsp_cs
== srv
->fdidx
[fd
].rsp_size
) {
313 srv
->fdidx
[fd
].rsp_cs
= 0;
314 srv
->fdidx
[fd
].rsp_size
= 0;
315 srv
->fdidx
[fd
].rsp_limit
= 0;
318 return ((size
< 0)? errno
: 0);