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