1 /*-
2 * l2control.c
3 *
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 *
6 * Copyright (c) 2001-2002 Maksim Yevmenkin <[email protected]>
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 * $FreeBSD$
32 */
33
34 #include <assert.h>
35 #define L2CAP_SOCKET_CHECKED
36 #include <bluetooth.h>
37 #include <err.h>
38 #include <errno.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include "l2control.h"
44
45 /* Prototypes */
46 static int do_l2cap_command (bdaddr_p, int, char **);
47 static struct l2cap_command * find_l2cap_command (char const *,
48 struct l2cap_command *);
49 static void print_l2cap_command (struct l2cap_command *);
50 static void usage (void);
51
52 /* Main */
53
54 int numeric_bdaddr = 0;
55
56 int
main(int argc,char * argv[])57 main(int argc, char *argv[])
58 {
59 int n;
60 bdaddr_t bdaddr;
61
62 memset(&bdaddr, 0, sizeof(bdaddr));
63
64 /* Process command line arguments */
65 while ((n = getopt(argc, argv, "a:nh")) != -1) {
66 switch (n) {
67 case 'a':
68 if (!bt_aton(optarg, &bdaddr)) {
69 struct hostent *he = NULL;
70
71 if ((he = bt_gethostbyname(optarg)) == NULL)
72 errx(1, "%s: %s", optarg, hstrerror(h_errno));
73
74 memcpy(&bdaddr, he->h_addr, sizeof(bdaddr));
75 }
76 break;
77
78 case 'n':
79 numeric_bdaddr = 1;
80 break;
81
82 case 'h':
83 default:
84 usage();
85 break;
86 }
87 }
88
89 argc -= optind;
90 argv += optind;
91
92 if (*argv == NULL)
93 usage();
94
95 return (do_l2cap_command(&bdaddr, argc, argv));
96 } /* main */
97
98 /* Execute commands */
99 static int
do_l2cap_command(bdaddr_p bdaddr,int argc,char ** argv)100 do_l2cap_command(bdaddr_p bdaddr, int argc, char **argv)
101 {
102 char *cmd = argv[0];
103 struct l2cap_command *c = NULL;
104 struct sockaddr_l2cap sa;
105 int s, e, help;
106
107 help = 0;
108 if (strcasecmp(cmd, "help") == 0) {
109 argc --;
110 argv ++;
111
112 if (argc <= 0) {
113 fprintf(stdout, "Supported commands:\n");
114 print_l2cap_command(l2cap_commands);
115 fprintf(stdout, "\nFor more information use " \
116 "'help command'\n");
117
118 return (OK);
119 }
120
121 help = 1;
122 cmd = argv[0];
123 }
124
125 c = find_l2cap_command(cmd, l2cap_commands);
126 if (c == NULL) {
127 fprintf(stdout, "Unknown command: \"%s\"\n", cmd);
128 return (ERROR);
129 }
130
131 if (!help) {
132 if (memcmp(bdaddr, NG_HCI_BDADDR_ANY, sizeof(*bdaddr)) == 0)
133 usage();
134
135 memset(&sa, 0, sizeof(sa));
136 sa.l2cap_len = sizeof(sa);
137 sa.l2cap_family = AF_BLUETOOTH;
138 memcpy(&sa.l2cap_bdaddr, bdaddr, sizeof(sa.l2cap_bdaddr));
139
140 s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_L2CAP);
141 if (s < 0)
142 err(1, "Could not create socket");
143
144 if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0)
145 err(2,
146 "Could not bind socket, bdaddr=%s", bt_ntoa(&sa.l2cap_bdaddr, NULL));
147
148 e = 0x0ffff;
149 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &e, sizeof(e)) < 0)
150 err(3, "Coult not setsockopt(RCVBUF, %d)", e);
151
152 e = (c->handler)(s, -- argc, ++ argv);
153
154 close(s);
155 } else
156 e = USAGE;
157
158 switch (e) {
159 case OK:
160 case FAILED:
161 break;
162
163 case ERROR:
164 fprintf(stdout, "Could not execute command \"%s\". %s\n",
165 cmd, strerror(errno));
166 break;
167
168 case USAGE:
169 fprintf(stdout, "Usage: %s\n%s\n", c->command, c->description);
170 break;
171
172 default: assert(0); break;
173 }
174
175 return (e);
176 } /* do_l2cap_command */
177
178 /* Try to find command in specified category */
179 static struct l2cap_command *
find_l2cap_command(char const * command,struct l2cap_command * category)180 find_l2cap_command(char const *command, struct l2cap_command *category)
181 {
182 struct l2cap_command *c = NULL;
183
184 for (c = category; c->command != NULL; c++) {
185 char *c_end = strchr(c->command, ' ');
186
187 if (c_end != NULL) {
188 int len = c_end - c->command;
189
190 if (strncasecmp(command, c->command, len) == 0)
191 return (c);
192 } else if (strcasecmp(command, c->command) == 0)
193 return (c);
194 }
195
196 return (NULL);
197 } /* find_l2cap_command */
198
199 /* Print commands in specified category */
200 static void
print_l2cap_command(struct l2cap_command * category)201 print_l2cap_command(struct l2cap_command *category)
202 {
203 struct l2cap_command *c = NULL;
204
205 for (c = category; c->command != NULL; c++)
206 fprintf(stdout, "\t%s\n", c->command);
207 } /* print_l2cap_command */
208
209 /* Usage */
210 static void
usage(void)211 usage(void)
212 {
213 fprintf(stderr, "Usage: l2control [-hn] -a local cmd [params ..]\n");
214 fprintf(stderr, "Where:\n");
215 fprintf(stderr, " -a local Specify local device to connect to\n");
216 fprintf(stderr, " -h Display this message\n");
217 fprintf(stderr, " -n Show addresses as numbers\n");
218 fprintf(stderr, " cmd Supported command " \
219 "(see l2control help)\n");
220 fprintf(stderr, " params Optional command parameters\n");
221 exit(255);
222 } /* usage */
223
224