1/*- 2 * l2control.c 3 * 4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD: stable/11/usr.sbin/bluetooth/l2control/l2control.c 330449 2018-03-05 07:26:05Z eadler $ 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 */ 46static int do_l2cap_command (bdaddr_p, int, char **); 47static struct l2cap_command * find_l2cap_command (char const *, 48 struct l2cap_command *); 49static void print_l2cap_command (struct l2cap_command *); 50static void usage (void); 51 52/* Main */ 53 54int numeric_bdaddr = 0; 55 56int 57main(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 */ 99static int 100do_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 */ 179static struct l2cap_command * 180find_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 */ 200static void 201print_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 */ 210static void 211usage(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