1/*
2 * l2control.c
3 *
4 * Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $Id: l2control.c,v 1.6 2003/09/05 00:38:25 max Exp $
29 * $FreeBSD$
30 */
31
32#include <assert.h>
33#include <bluetooth.h>
34#include <err.h>
35#include <errno.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <unistd.h>
40#include "l2control.h"
41
42/* Prototypes */
43static int                    do_l2cap_command    (bdaddr_p, int, char **);
44static struct l2cap_command * find_l2cap_command  (char const *,
45                                                   struct l2cap_command *);
46static void                   print_l2cap_command (struct l2cap_command *);
47static void                   usage               (void);
48
49/* Main */
50
51int	numeric_bdaddr = 0;
52
53int
54main(int argc, char *argv[])
55{
56	int		n;
57	bdaddr_t	bdaddr;
58
59	memset(&bdaddr, 0, sizeof(bdaddr));
60
61	/* Process command line arguments */
62	while ((n = getopt(argc, argv, "a:nh")) != -1) {
63		switch (n) {
64		case 'a':
65			if (!bt_aton(optarg, &bdaddr)) {
66				struct hostent	*he = NULL;
67
68				if ((he = bt_gethostbyname(optarg)) == NULL)
69					errx(1, "%s: %s", optarg, hstrerror(h_errno));
70
71				memcpy(&bdaddr, he->h_addr, sizeof(bdaddr));
72			}
73			break;
74
75		case 'n':
76			numeric_bdaddr = 1;
77			break;
78
79		case 'h':
80		default:
81			usage();
82			break;
83		}
84	}
85
86	argc -= optind;
87	argv += optind;
88
89	if (*argv == NULL)
90		usage();
91
92	return (do_l2cap_command(&bdaddr, argc, argv));
93} /* main */
94
95/* Execute commands */
96static int
97do_l2cap_command(bdaddr_p bdaddr, int argc, char **argv)
98{
99	char			*cmd = argv[0];
100	struct l2cap_command	*c = NULL;
101	struct sockaddr_l2cap	 sa;
102	int			 s, e, help;
103
104	help = 0;
105	if (strcasecmp(cmd, "help") == 0) {
106		argc --;
107		argv ++;
108
109		if (argc <= 0) {
110			fprintf(stdout, "Supported commands:\n");
111			print_l2cap_command(l2cap_commands);
112			fprintf(stdout, "\nFor more information use " \
113				"'help command'\n");
114
115			return (OK);
116		}
117
118		help = 1;
119		cmd = argv[0];
120	}
121
122	c = find_l2cap_command(cmd, l2cap_commands);
123	if (c == NULL) {
124		fprintf(stdout, "Unknown command: \"%s\"\n", cmd);
125		return (ERROR);
126	}
127
128	if (!help) {
129		if (memcmp(bdaddr, NG_HCI_BDADDR_ANY, sizeof(*bdaddr)) == 0)
130			usage();
131
132		memset(&sa, 0, sizeof(sa));
133		sa.l2cap_len = sizeof(sa);
134		sa.l2cap_family = AF_BLUETOOTH;
135		memcpy(&sa.l2cap_bdaddr, bdaddr, sizeof(sa.l2cap_bdaddr));
136
137		s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_L2CAP);
138		if (s < 0)
139			err(1, "Could not create socket");
140
141		if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0)
142			err(2,
143"Could not bind socket, bdaddr=%s", bt_ntoa(&sa.l2cap_bdaddr, NULL));
144
145		e = 0x0ffff;
146		if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &e, sizeof(e)) < 0)
147			err(3, "Coult not setsockopt(RCVBUF, %d)", e);
148
149		e = (c->handler)(s, -- argc, ++ argv);
150
151		close(s);
152	} else
153		e = USAGE;
154
155	switch (e) {
156	case OK:
157	case FAILED:
158		break;
159
160	case ERROR:
161		fprintf(stdout, "Could not execute command \"%s\". %s\n",
162			cmd, strerror(errno));
163		break;
164
165	case USAGE:
166		fprintf(stdout, "Usage: %s\n%s\n", c->command, c->description);
167		break;
168
169	default: assert(0); break;
170	}
171
172	return (e);
173} /* do_l2cap_command */
174
175/* Try to find command in specified category */
176static struct l2cap_command *
177find_l2cap_command(char const *command, struct l2cap_command *category)
178{
179	struct l2cap_command	*c = NULL;
180
181	for (c = category; c->command != NULL; c++) {
182		char 	*c_end = strchr(c->command, ' ');
183
184		if (c_end != NULL) {
185			int	len = c_end - c->command;
186
187			if (strncasecmp(command, c->command, len) == 0)
188				return (c);
189		} else if (strcasecmp(command, c->command) == 0)
190				return (c);
191	}
192
193	return (NULL);
194} /* find_l2cap_command */
195
196/* Print commands in specified category */
197static void
198print_l2cap_command(struct l2cap_command *category)
199{
200	struct l2cap_command	*c = NULL;
201
202	for (c = category; c->command != NULL; c++)
203		fprintf(stdout, "\t%s\n", c->command);
204} /* print_l2cap_command */
205
206/* Usage */
207static void
208usage(void)
209{
210	fprintf(stderr, "Usage: l2control [-hn] -a local cmd [params ..]\n");
211	fprintf(stderr, "Where:\n");
212	fprintf(stderr, "  -a local   Specify local device to connect to\n");
213	fprintf(stderr, "  -h         Display this message\n");
214	fprintf(stderr, "  -n         Show addresses as numbers\n");
215	fprintf(stderr, "  cmd        Supported command " \
216		"(see l2control help)\n");
217	fprintf(stderr, "  params     Optional command parameters\n");
218	exit(255);
219} /* usage */
220
221