1187938Semax/* $NetBSD: btpand.c,v 1.1 2008/08/17 13:20:57 plunky Exp $ */ 2187938Semax 3187938Semax/*- 4330449Seadler * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5330449Seadler * 6187938Semax * Copyright (c) 2008 Iain Hibbert 7187938Semax * All rights reserved. 8187938Semax * 9187938Semax * Redistribution and use in source and binary forms, with or without 10187938Semax * modification, are permitted provided that the following conditions 11187938Semax * are met: 12187938Semax * 1. Redistributions of source code must retain the above copyright 13187938Semax * notice, this list of conditions and the following disclaimer. 14187938Semax * 2. Redistributions in binary form must reproduce the above copyright 15187938Semax * notice, this list of conditions and the following disclaimer in the 16187938Semax * documentation and/or other materials provided with the distribution. 17187938Semax * 18187938Semax * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19187938Semax * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20187938Semax * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21187938Semax * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22187938Semax * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23187938Semax * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24187938Semax * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25187938Semax * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26187938Semax * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27187938Semax * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28187938Semax */ 29187938Semax 30187938Semax/* $FreeBSD: stable/11/usr.sbin/bluetooth/btpand/btpand.c 330449 2018-03-05 07:26:05Z eadler $ */ 31187938Semax 32187938Semax#include <sys/cdefs.h> 33187938Semax__COPYRIGHT("@(#) Copyright (c) 2008 Iain Hibbert. All rights reserved."); 34187938Semax__RCSID("$NetBSD: btpand.c,v 1.1 2008/08/17 13:20:57 plunky Exp $"); 35187938Semax 36187938Semax#include <sys/wait.h> 37187938Semax 38281210Stakawata#define L2CAP_SOCKET_CHECKED 39187938Semax#include <bluetooth.h> 40187938Semax#include <err.h> 41187938Semax#include <fcntl.h> 42187938Semax#include <paths.h> 43187938Semax#include <sdp.h> 44187938Semax#include <stdio.h> 45187938Semax#include <signal.h> 46187938Semax#include <stdlib.h> 47187938Semax#include <string.h> 48187938Semax#include <unistd.h> 49187938Semax 50187938Semax#include "btpand.h" 51187938Semax 52187938Semax/* global variables */ 53187938Semaxconst char * control_path; /* -c <path> */ 54187938Semaxconst char * interface_name; /* -i <ifname> */ 55187938Semaxconst char * service_name; /* -s <service> */ 56187938Semaxuint16_t service_class; 57187938Semax 58187938Semaxbdaddr_t local_bdaddr; /* -d <addr> */ 59187938Semaxbdaddr_t remote_bdaddr; /* -a <addr> */ 60188013Semaxuint16_t l2cap_psm; /* -p <psm> */ 61188013Semaxint l2cap_mode; /* -m <mode> */ 62187938Semax 63187938Semaxint server_limit; /* -n <limit> */ 64187938Semax 65187938Semaxstatic const struct { 66187938Semax const char * name; 67187938Semax uint16_t class; 68187938Semax const char * desc; 69187938Semax} services[] = { 70187938Semax { "PANU", SDP_SERVICE_CLASS_PANU, "Personal Area Networking User" }, 71298883Spfg { "NAP", SDP_SERVICE_CLASS_NAP, "Network Access Point" }, 72187938Semax { "GN", SDP_SERVICE_CLASS_GN, "Group Network" }, 73187938Semax}; 74187938Semax 75187938Semaxstatic void main_exit(int); 76187938Semaxstatic void main_detach(void); 77187938Semaxstatic void usage(void); 78187938Semax 79187938Semaxint 80187938Semaxmain(int argc, char *argv[]) 81187938Semax{ 82187938Semax unsigned long ul; 83187938Semax char * ep; 84187938Semax int ch, status; 85187938Semax 86187938Semax while ((ch = getopt(argc, argv, "a:c:d:i:l:m:p:S:s:")) != -1) { 87187938Semax switch (ch) { 88187938Semax case 'a': /* remote address */ 89187938Semax if (!bt_aton(optarg, &remote_bdaddr)) { 90187938Semax struct hostent *he; 91187938Semax 92187938Semax if ((he = bt_gethostbyname(optarg)) == NULL) 93187938Semax errx(EXIT_FAILURE, "%s: %s", 94187938Semax optarg, hstrerror(h_errno)); 95187938Semax 96187938Semax bdaddr_copy(&remote_bdaddr, 97187938Semax (bdaddr_t *)he->h_addr); 98187938Semax } 99187938Semax 100187938Semax break; 101187938Semax 102187938Semax case 'c': /* control socket path */ 103187938Semax control_path = optarg; 104187938Semax break; 105187938Semax 106187938Semax case 'd': /* local address */ 107192308Semax if (!bt_devaddr(optarg, &local_bdaddr)) { 108187938Semax struct hostent *he; 109187938Semax 110187938Semax if ((he = bt_gethostbyname(optarg)) == NULL) 111187938Semax errx(EXIT_FAILURE, "%s: %s", 112187938Semax optarg, hstrerror(h_errno)); 113187938Semax 114187938Semax bdaddr_copy(&local_bdaddr, 115187938Semax (bdaddr_t *)he->h_addr); 116187938Semax } 117187938Semax break; 118187938Semax 119187938Semax case 'i': /* tap interface name */ 120187938Semax if (strchr(optarg, '/') == NULL) { 121187938Semax asprintf(&ep, "/dev/%s", optarg); 122187938Semax interface_name = ep; 123187938Semax } else 124187938Semax interface_name = optarg; 125187938Semax break; 126187938Semax 127187938Semax case 'l': /* limit server sessions */ 128187938Semax ul = strtoul(optarg, &ep, 10); 129187938Semax if (*optarg == '\0' || *ep != '\0' || ul == 0) 130187938Semax errx(EXIT_FAILURE, "%s: invalid session limit", 131187938Semax optarg); 132187938Semax 133187938Semax server_limit = ul; 134187938Semax break; 135187938Semax 136187938Semax case 'm': /* link mode */ 137187938Semax warnx("Setting link mode is not yet supported"); 138187938Semax break; 139187938Semax 140187938Semax case 'p': /* protocol/service multiplexer */ 141187938Semax ul = strtoul(optarg, &ep, 0); 142187938Semax if (*optarg == '\0' || *ep != '\0' 143187938Semax || ul > 0xffff || L2CAP_PSM_INVALID(ul)) 144187938Semax errx(EXIT_FAILURE, "%s: invalid PSM", optarg); 145187938Semax 146187938Semax l2cap_psm = ul; 147187938Semax break; 148187938Semax 149187938Semax case 's': /* service */ 150187938Semax case 'S': /* service (no SDP) */ 151187938Semax for (ul = 0; strcasecmp(optarg, services[ul].name); ul++) { 152187938Semax if (ul == __arraycount(services)) 153187938Semax errx(EXIT_FAILURE, "%s: unknown service", optarg); 154187938Semax } 155187938Semax 156187938Semax if (ch == 's') 157187938Semax service_name = services[ul].name; 158187938Semax 159187938Semax service_class = services[ul].class; 160187938Semax break; 161187938Semax 162187938Semax default: 163187938Semax usage(); 164187938Semax /* NOTREACHED */ 165187938Semax } 166187938Semax } 167187938Semax 168187938Semax argc -= optind; 169187938Semax argv += optind; 170187938Semax 171187938Semax /* validate options */ 172187938Semax if (bdaddr_any(&local_bdaddr) || service_class == 0) 173187938Semax usage(); 174187938Semax 175187938Semax if (!bdaddr_any(&remote_bdaddr) && (server_limit != 0 || 176301482Saraujo control_path != NULL || (service_name != NULL && l2cap_psm != 0))) 177187938Semax usage(); 178187938Semax 179187938Semax /* default options */ 180187938Semax if (interface_name == NULL) 181187938Semax interface_name = "/dev/tap"; 182187938Semax 183188013Semax if (l2cap_psm == 0) 184188013Semax l2cap_psm = L2CAP_PSM_BNEP; 185188013Semax 186187938Semax if (bdaddr_any(&remote_bdaddr) && server_limit == 0) { 187187938Semax if (service_class == SDP_SERVICE_CLASS_PANU) 188187938Semax server_limit = 1; 189187938Semax else 190187938Semax server_limit = 7; 191187938Semax } 192187938Semax 193187938Semax#ifdef L2CAP_LM_MASTER 194187938Semax if (server_limit > 1 && service_class != SDP_SERVICE_CLASS_PANU) 195187938Semax l2cap_mode |= L2CAP_LM_MASTER; 196187938Semax#endif 197187938Semax 198187938Semax /* 199187938Semax * fork() now so that the setup can be done in the child process 200187938Semax * (as kqueue is not inherited) but block in the parent until the 201187938Semax * setup is finished so we can return an error if necessary. 202187938Semax */ 203187938Semax switch(fork()) { 204187938Semax case -1: /* bad */ 205187938Semax err(EXIT_FAILURE, "fork() failed"); 206187938Semax 207187938Semax case 0: /* child */ 208187938Semax signal(SIGPIPE, SIG_IGN); 209187938Semax 210187938Semax openlog(getprogname(), LOG_NDELAY | LOG_PERROR | LOG_PID, LOG_DAEMON); 211187938Semax 212187938Semax channel_init(); 213187938Semax server_init(); 214187938Semax event_init(); 215187938Semax client_init(); 216187938Semax tap_init(); 217187938Semax 218187938Semax main_detach(); 219187938Semax 220187938Semax event_dispatch(); 221187938Semax break; 222187938Semax 223187938Semax default: /* parent */ 224187938Semax signal(SIGUSR1, main_exit); 225187938Semax wait(&status); 226187938Semax 227187938Semax if (WIFEXITED(status)) 228187938Semax exit(WEXITSTATUS(status)); 229187938Semax 230187938Semax break; 231187938Semax } 232187938Semax 233187938Semax err(EXIT_FAILURE, "exiting"); 234187938Semax} 235187938Semax 236187938Semaxstatic void 237187938Semaxmain_exit(int s) 238187938Semax{ 239187938Semax 240187938Semax /* child is all grown up */ 241187938Semax _exit(EXIT_SUCCESS); 242187938Semax} 243187938Semax 244187938Semaxstatic void 245187938Semaxmain_detach(void) 246187938Semax{ 247187938Semax int fd; 248187938Semax 249187938Semax if (kill(getppid(), SIGUSR1) == -1) 250187938Semax log_err("Could not signal main process: %m"); 251187938Semax 252187938Semax if (setsid() == -1) 253187938Semax log_err("setsid() failed"); 254187938Semax 255187938Semax fd = open(_PATH_DEVNULL, O_RDWR, 0); 256187938Semax if (fd == -1) { 257187938Semax log_err("Could not open %s", _PATH_DEVNULL); 258187938Semax } else { 259187938Semax (void)dup2(fd, STDIN_FILENO); 260187938Semax (void)dup2(fd, STDOUT_FILENO); 261187938Semax (void)dup2(fd, STDERR_FILENO); 262187938Semax close(fd); 263187938Semax } 264187938Semax} 265187938Semax 266187938Semaxstatic void 267187938Semaxusage(void) 268187938Semax{ 269187938Semax const char *p = getprogname(); 270187938Semax int n = strlen(p); 271187938Semax 272187938Semax fprintf(stderr, 273187938Semax "usage: %s [-i ifname] [-m mode] -a address -d device\n" 274187938Semax " %*s {-s service | -S service [-p psm]}\n" 275187938Semax " %s [-c path] [-i ifname] [-l limit] [-m mode] [-p psm] -d device\n" 276187938Semax " %*s {-s service | -S service}\n" 277187938Semax "\n" 278187938Semax "Where:\n" 279187938Semax "\t-a address remote bluetooth device\n" 280187938Semax "\t-c path SDP server socket\n" 281187938Semax "\t-d device local bluetooth device\n" 282187938Semax "\t-i ifname tap interface\n" 283187938Semax "\t-l limit limit server sessions\n" 284187938Semax "\t-m mode L2CAP link mode (NOT YET SUPPORTED)\n" 285187938Semax "\t-p psm L2CAP PSM\n" 286187938Semax "\t-S service service name (no SDP)\n" 287187938Semax "\t-s service service name\n" 288187938Semax "\n" 289187938Semax "Known services:\n" 290187938Semax "", p, n, "", p, n, ""); 291187938Semax 292187938Semax for (n = 0; n < __arraycount(services); n++) 293187938Semax fprintf(stderr, "\t%s\t%s\n", services[n].name, services[n].desc); 294187938Semax 295187938Semax exit(EXIT_FAILURE); 296187938Semax} 297