1/*-
2 * srr.c
3 *
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 *
6 * Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $Id: srr.c,v 1.1 2004/01/13 01:54:39 max Exp $
31 * $FreeBSD: stable/11/usr.sbin/bluetooth/sdpd/srr.c 330449 2018-03-05 07:26:05Z eadler $
32 */
33
34#include <sys/queue.h>
35#include <sys/uio.h>
36#include <netinet/in.h>
37#include <arpa/inet.h>
38#include <assert.h>
39#define L2CAP_SOCKET_CHECKED
40#include <bluetooth.h>
41#include <errno.h>
42#include <sdp.h>
43#include <string.h>
44#include "profile.h"
45#include "provider.h"
46#include "server.h"
47
48/*
49 * Prepare Service Register response
50 */
51
52int32_t
53server_prepare_service_register_response(server_p srv, int32_t fd)
54{
55	uint8_t const	*req = srv->req + sizeof(sdp_pdu_t);
56	uint8_t const	*req_end = req + ((sdp_pdu_p)(srv->req))->len;
57	uint8_t		*rsp = srv->fdidx[fd].rsp;
58
59	profile_t	*profile = NULL;
60	provider_t	*provider = NULL;
61	bdaddr_t	*bdaddr = NULL;
62	int32_t		 uuid;
63
64	/*
65	 * Minimal Service Register Request
66	 *
67	 * value16	- uuid 2 bytes
68	 * bdaddr	- BD_ADDR 6 bytes
69	 */
70
71	if (!srv->fdidx[fd].control ||
72	    !srv->fdidx[fd].priv || req_end - req < 8)
73		return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
74
75	/* Get ServiceClass UUID */
76	SDP_GET16(uuid, req);
77
78	/* Get BD_ADDR */
79	bdaddr = (bdaddr_p) req;
80	req += sizeof(*bdaddr);
81
82	/* Lookup profile descriptror */
83	profile = profile_get_descriptor(uuid);
84	if (profile == NULL)
85		return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
86
87	/* Validate user data */
88	if (req_end - req < profile->dsize ||
89	    profile->valid == NULL ||
90	    (profile->valid)(req, req_end - req) == 0)
91		return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
92
93	/* Register provider */
94	provider = provider_register(profile, bdaddr, fd, req, req_end - req);
95	if (provider == NULL)
96		return (SDP_ERROR_CODE_INSUFFICIENT_RESOURCES);
97
98	SDP_PUT16(0, rsp);
99	SDP_PUT32(provider->handle, rsp);
100
101	/* Set reply size */
102	srv->fdidx[fd].rsp_limit = srv->fdidx[fd].omtu - sizeof(sdp_pdu_t);
103	srv->fdidx[fd].rsp_size = rsp - srv->fdidx[fd].rsp;
104	srv->fdidx[fd].rsp_cs = 0;
105
106	return (0);
107}
108
109/*
110 * Send Service Register Response
111 */
112
113int32_t
114server_send_service_register_response(server_p srv, int32_t fd)
115{
116	struct iovec	iov[2];
117	sdp_pdu_t	pdu;
118	int32_t		size;
119
120	assert(srv->fdidx[fd].rsp_size < srv->fdidx[fd].rsp_limit);
121
122	pdu.pid = SDP_PDU_ERROR_RESPONSE;
123	pdu.tid = ((sdp_pdu_p)(srv->req))->tid;
124	pdu.len = htons(srv->fdidx[fd].rsp_size);
125
126	iov[0].iov_base = &pdu;
127	iov[0].iov_len = sizeof(pdu);
128
129	iov[1].iov_base = srv->fdidx[fd].rsp;
130	iov[1].iov_len = srv->fdidx[fd].rsp_size;
131
132	do {
133		size = writev(fd, (struct iovec const *) &iov, sizeof(iov)/sizeof(iov[0]));
134	} while (size < 0 && errno == EINTR);
135
136	srv->fdidx[fd].rsp_cs = 0;
137	srv->fdidx[fd].rsp_size = 0;
138	srv->fdidx[fd].rsp_limit = 0;
139
140	return ((size < 0)? errno : 0);
141}
142
143