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: stable/9/usr.sbin/bluetooth/l2control/l2control.c 220840 2011-04-19 16:21:57Z emax $
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 */
43 static int do_l2cap_command (bdaddr_p, int, char **);
44 static struct l2cap_command * find_l2cap_command (char const *,
45 struct l2cap_command *);
46 static void print_l2cap_command (struct l2cap_command *);
47 static void usage (void);
48
49 /* Main */
50
51 int numeric_bdaddr = 0;
52
53 int
main(int argc,char * argv[])54 main(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 */
96 static int
do_l2cap_command(bdaddr_p bdaddr,int argc,char ** argv)97 do_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 */
176 static struct l2cap_command *
find_l2cap_command(char const * command,struct l2cap_command * category)177 find_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 */
197 static void
print_l2cap_command(struct l2cap_command * category)198 print_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 */
207 static void
usage(void)208 usage(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