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 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 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 * 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 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 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