1/*
2 * bthidd.c
3 */
4
5/*-
6 * Copyright (c) 2006 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: bthidd.c,v 1.8 2006/09/07 21:06:53 max Exp $
31 * $FreeBSD: releng/11.0/usr.sbin/bluetooth/bthidd/bthidd.c 281210 2015-04-07 16:48:23Z takawata $
32 */
33
34#include <sys/time.h>
35#include <sys/queue.h>
36#include <assert.h>
37#define L2CAP_SOCKET_CHECKED
38#include <bluetooth.h>
39#include <err.h>
40#include <errno.h>
41#include <signal.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <syslog.h>
46#include <unistd.h>
47#include <usbhid.h>
48#include "bthid_config.h"
49#include "bthidd.h"
50
51static int32_t	write_pid_file	(char const *file);
52static int32_t	remove_pid_file	(char const *file);
53static int32_t	elapsed		(int32_t tval);
54static void	sighandler	(int32_t s);
55static void	usage		(void);
56
57/*
58 * bthidd
59 */
60
61static int32_t	done = 0; /* are we done? */
62
63int32_t
64main(int32_t argc, char *argv[])
65{
66	struct bthid_server	 srv;
67	struct sigaction	 sa;
68	char const		*pid_file = BTHIDD_PIDFILE;
69	char			*ep;
70	int32_t			 opt, detach, tval;
71
72	memset(&srv, 0, sizeof(srv));
73	memset(&srv.bdaddr, 0, sizeof(srv.bdaddr));
74	detach = 1;
75	tval = 10; /* sec */
76
77	while ((opt = getopt(argc, argv, "a:c:dH:hp:t:")) != -1) {
78		switch (opt) {
79		case 'a': /* BDADDR */
80			if (!bt_aton(optarg, &srv.bdaddr)) {
81				struct hostent  *he;
82
83				if ((he = bt_gethostbyname(optarg)) == NULL)
84					errx(1, "%s: %s", optarg, hstrerror(h_errno));
85
86				memcpy(&srv.bdaddr, he->h_addr, sizeof(srv.bdaddr));
87			}
88			break;
89
90		case 'c': /* config file */
91			config_file = optarg;
92			break;
93
94		case 'd': /* do not detach */
95			detach = 0;
96			break;
97
98		case 'H': /* hids file */
99			hids_file = optarg;
100			break;
101
102		case 'p': /* pid file */
103			pid_file = optarg;
104			break;
105
106		case 't': /* rescan interval */
107			tval = strtol(optarg, (char **) &ep, 10);
108			if (*ep != '\0' || tval <= 0)
109				usage();
110			break;
111
112		case 'h':
113		default:
114			usage();
115			/* NOT REACHED */
116		}
117	}
118
119	openlog(BTHIDD_IDENT, LOG_PID|LOG_PERROR|LOG_NDELAY, LOG_USER);
120
121	/* Become daemon if required */
122	if (detach && daemon(0, 0) < 0) {
123		syslog(LOG_CRIT, "Could not become daemon. %s (%d)",
124			strerror(errno), errno);
125		exit(1);
126	}
127
128	/* Install signal handler */
129	memset(&sa, 0, sizeof(sa));
130	sa.sa_handler = sighandler;
131
132	if (sigaction(SIGTERM, &sa, NULL) < 0 ||
133	    sigaction(SIGHUP, &sa, NULL) < 0 ||
134	    sigaction(SIGINT, &sa, NULL) < 0) {
135		syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)",
136			strerror(errno), errno);
137		exit(1);
138	}
139
140	sa.sa_handler = SIG_IGN;
141	if (sigaction(SIGPIPE, &sa, NULL) < 0) {
142		syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)",
143			strerror(errno), errno);
144		exit(1);
145	}
146
147	sa.sa_handler = SIG_IGN;
148	sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT;
149	if (sigaction(SIGCHLD, &sa, NULL) < 0) {
150		syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)",
151			strerror(errno), errno);
152		exit(1);
153	}
154
155	if (read_config_file() < 0 || read_hids_file() < 0 ||
156	    server_init(&srv) < 0 || write_pid_file(pid_file) < 0)
157		exit(1);
158
159	for (done = 0; !done; ) {
160		if (elapsed(tval))
161			client_rescan(&srv);
162
163		if (server_do(&srv) < 0)
164			break;
165	}
166
167	server_shutdown(&srv);
168	remove_pid_file(pid_file);
169	clean_config();
170	closelog();
171
172	return (0);
173}
174
175/*
176 * Write pid file
177 */
178
179static int32_t
180write_pid_file(char const *file)
181{
182	FILE	*pid;
183
184	assert(file != NULL);
185
186	if ((pid = fopen(file, "w")) == NULL) {
187		syslog(LOG_ERR, "Could not open file %s. %s (%d)",
188			file, strerror(errno), errno);
189		return (-1);
190	}
191
192	fprintf(pid, "%d", getpid());
193	fclose(pid);
194
195	return (0);
196}
197
198/*
199 * Remote pid file
200 */
201
202static int32_t
203remove_pid_file(char const *file)
204{
205	assert(file != NULL);
206
207	if (unlink(file) < 0) {
208		syslog(LOG_ERR, "Could not unlink file %s. %s (%d)",
209			file, strerror(errno), errno);
210		return (-1);
211	}
212
213	return (0);
214}
215
216/*
217 * Returns true if desired time interval has elapsed
218 */
219
220static int32_t
221elapsed(int32_t tval)
222{
223	static struct timeval	last = { 0, 0 };
224	struct timeval		now;
225
226	gettimeofday(&now, NULL);
227
228	if (now.tv_sec - last.tv_sec >= tval) {
229		last = now;
230		return (1);
231	}
232
233	return (0);
234}
235
236/*
237 * Signal handler
238 */
239
240static void
241sighandler(int32_t s)
242{
243	syslog(LOG_NOTICE, "Got signal %d, total number of signals %d",
244		s, ++ done);
245}
246
247/*
248 * Display usage and exit
249 */
250
251static void
252usage(void)
253{
254	fprintf(stderr,
255"Usage: %s [options]\n" \
256"Where options are:\n" \
257"	-a address	specify address to listen on (default ANY)\n" \
258"	-c file		specify config file name\n" \
259"	-d		run in foreground\n" \
260"	-H file		specify known HIDs file name\n" \
261"	-h		display this message\n" \
262"	-p file		specify PID file name\n" \
263"	-t tval		specify client rescan interval (sec)\n" \
264"", BTHIDD_IDENT);
265	exit(255);
266}
267
268