1/*-
2 * l2control.c
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2001-2002 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: l2control.c,v 1.6 2003/09/05 00:38:25 max Exp $
31 */
32
33#include <assert.h>
34#define L2CAP_SOCKET_CHECKED
35#include <bluetooth.h>
36#include <err.h>
37#include <errno.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <unistd.h>
42#include "l2control.h"
43
44/* Prototypes */
45static int                    do_l2cap_command    (bdaddr_p, int, char **);
46static struct l2cap_command * find_l2cap_command  (char const *,
47                                                   struct l2cap_command *);
48static void                   print_l2cap_command (struct l2cap_command *);
49static void                   usage               (void);
50
51/* Main */
52
53int	numeric_bdaddr = 0;
54
55int
56main(int argc, char *argv[])
57{
58	int		n;
59	bdaddr_t	bdaddr;
60
61	memset(&bdaddr, 0, sizeof(bdaddr));
62
63	/* Process command line arguments */
64	while ((n = getopt(argc, argv, "a:nh")) != -1) {
65		switch (n) {
66		case 'a':
67			if (!bt_aton(optarg, &bdaddr)) {
68				struct hostent	*he = NULL;
69
70				if ((he = bt_gethostbyname(optarg)) == NULL)
71					errx(1, "%s: %s", optarg, hstrerror(h_errno));
72
73				memcpy(&bdaddr, he->h_addr, sizeof(bdaddr));
74			}
75			break;
76
77		case 'n':
78			numeric_bdaddr = 1;
79			break;
80
81		case 'h':
82		default:
83			usage();
84			break;
85		}
86	}
87
88	argc -= optind;
89	argv += optind;
90
91	if (*argv == NULL)
92		usage();
93
94	return (do_l2cap_command(&bdaddr, argc, argv));
95} /* main */
96
97/* Execute commands */
98static int
99do_l2cap_command(bdaddr_p bdaddr, int argc, char **argv)
100{
101	char			*cmd = argv[0];
102	struct l2cap_command	*c = NULL;
103	struct sockaddr_l2cap	 sa;
104	int			 s, e, help;
105
106	help = 0;
107	if (strcasecmp(cmd, "help") == 0) {
108		argc --;
109		argv ++;
110
111		if (argc <= 0) {
112			fprintf(stdout, "Supported commands:\n");
113			print_l2cap_command(l2cap_commands);
114			fprintf(stdout, "\nFor more information use " \
115				"'help command'\n");
116
117			return (OK);
118		}
119
120		help = 1;
121		cmd = argv[0];
122	}
123
124	c = find_l2cap_command(cmd, l2cap_commands);
125	if (c == NULL) {
126		fprintf(stdout, "Unknown command: \"%s\"\n", cmd);
127		return (ERROR);
128	}
129
130	if (!help) {
131		if (memcmp(bdaddr, NG_HCI_BDADDR_ANY, sizeof(*bdaddr)) == 0)
132			usage();
133
134		memset(&sa, 0, sizeof(sa));
135		sa.l2cap_len = sizeof(sa);
136		sa.l2cap_family = AF_BLUETOOTH;
137		memcpy(&sa.l2cap_bdaddr, bdaddr, sizeof(sa.l2cap_bdaddr));
138
139		s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_L2CAP);
140		if (s < 0)
141			err(1, "Could not create socket");
142
143		if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0)
144			err(2,
145"Could not bind socket, bdaddr=%s", bt_ntoa(&sa.l2cap_bdaddr, NULL));
146
147		e = 0x0ffff;
148		if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &e, sizeof(e)) < 0)
149			err(3, "Could not setsockopt(RCVBUF, %d)", e);
150
151		e = (c->handler)(s, -- argc, ++ argv);
152
153		close(s);
154	} else
155		e = USAGE;
156
157	switch (e) {
158	case OK:
159	case FAILED:
160		break;
161
162	case ERROR:
163		fprintf(stdout, "Could not execute command \"%s\". %s\n",
164			cmd, strerror(errno));
165		break;
166
167	case USAGE:
168		fprintf(stdout, "Usage: %s\n%s\n", c->command, c->description);
169		break;
170
171	default: assert(0); break;
172	}
173
174	return (e);
175} /* do_l2cap_command */
176
177/* Try to find command in specified category */
178static struct l2cap_command *
179find_l2cap_command(char const *command, struct l2cap_command *category)
180{
181	struct l2cap_command	*c = NULL;
182
183	for (c = category; c->command != NULL; c++) {
184		char 	*c_end = strchr(c->command, ' ');
185
186		if (c_end != NULL) {
187			int	len = c_end - c->command;
188
189			if (strncasecmp(command, c->command, len) == 0)
190				return (c);
191		} else if (strcasecmp(command, c->command) == 0)
192				return (c);
193	}
194
195	return (NULL);
196} /* find_l2cap_command */
197
198/* Print commands in specified category */
199static void
200print_l2cap_command(struct l2cap_command *category)
201{
202	struct l2cap_command	*c = NULL;
203
204	for (c = category; c->command != NULL; c++)
205		fprintf(stdout, "\t%s\n", c->command);
206} /* print_l2cap_command */
207
208/* Usage */
209static void
210usage(void)
211{
212	fprintf(stderr, "Usage: l2control [-hn] -a local cmd [params ..]\n");
213	fprintf(stderr, "Where:\n");
214	fprintf(stderr, "  -a local   Specify local device to connect to\n");
215	fprintf(stderr, "  -h         Display this message\n");
216	fprintf(stderr, "  -n         Show addresses as numbers\n");
217	fprintf(stderr, "  cmd        Supported command " \
218		"(see l2control help)\n");
219	fprintf(stderr, "  params     Optional command parameters\n");
220	exit(255);
221} /* usage */
222
223