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 */
45 static int do_l2cap_command (bdaddr_p, int, char **);
46 static struct l2cap_command * find_l2cap_command (char const *,
47 struct l2cap_command *);
48 static void print_l2cap_command (struct l2cap_command *);
49 static void usage (void);
50
51 /* Main */
52
53 int numeric_bdaddr = 0;
54
55 int
main(int argc,char * argv[])56 main(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 */
98 static int
do_l2cap_command(bdaddr_p bdaddr,int argc,char ** argv)99 do_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 */
178 static struct l2cap_command *
find_l2cap_command(char const * command,struct l2cap_command * category)179 find_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 */
199 static void
print_l2cap_command(struct l2cap_command * category)200 print_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 */
209 static void
usage(void)210 usage(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