294 lines
7.2 KiB
C
294 lines
7.2 KiB
C
/* $NetBSD: btpand.c,v 1.1 2008/08/17 13:20:57 plunky Exp $ */
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/*-
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* Copyright (c) 2008 Iain Hibbert
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* $FreeBSD$ */
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#include <sys/cdefs.h>
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__COPYRIGHT("@(#) Copyright (c) 2008 Iain Hibbert. All rights reserved.");
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__RCSID("$NetBSD: btpand.c,v 1.1 2008/08/17 13:20:57 plunky Exp $");
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#include <sys/wait.h>
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#include <bluetooth.h>
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#include <err.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <sdp.h>
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#include <stdio.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "btpand.h"
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/* global variables */
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const char * control_path; /* -c <path> */
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const char * interface_name; /* -i <ifname> */
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const char * service_name; /* -s <service> */
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uint16_t service_class;
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bdaddr_t local_bdaddr; /* -d <addr> */
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bdaddr_t remote_bdaddr; /* -a <addr> */
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uint16_t l2cap_psm; /* -p <psm> */
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int l2cap_mode; /* -m <mode> */
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int server_limit; /* -n <limit> */
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static const struct {
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const char * name;
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uint16_t class;
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const char * desc;
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} services[] = {
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{ "PANU", SDP_SERVICE_CLASS_PANU, "Personal Area Networking User" },
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{ "NAP", SDP_SERVICE_CLASS_NAP, "Network Acess Point" },
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{ "GN", SDP_SERVICE_CLASS_GN, "Group Network" },
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};
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static void main_exit(int);
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static void main_detach(void);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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unsigned long ul;
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char * ep;
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int ch, status;
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while ((ch = getopt(argc, argv, "a:c:d:i:l:m:p:S:s:")) != -1) {
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switch (ch) {
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case 'a': /* remote address */
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if (!bt_aton(optarg, &remote_bdaddr)) {
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struct hostent *he;
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if ((he = bt_gethostbyname(optarg)) == NULL)
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errx(EXIT_FAILURE, "%s: %s",
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optarg, hstrerror(h_errno));
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bdaddr_copy(&remote_bdaddr,
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(bdaddr_t *)he->h_addr);
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}
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break;
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case 'c': /* control socket path */
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control_path = optarg;
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break;
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case 'd': /* local address */
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if (!bt_devaddr(optarg, &local_bdaddr)) {
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struct hostent *he;
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if ((he = bt_gethostbyname(optarg)) == NULL)
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errx(EXIT_FAILURE, "%s: %s",
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optarg, hstrerror(h_errno));
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bdaddr_copy(&local_bdaddr,
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(bdaddr_t *)he->h_addr);
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}
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break;
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case 'i': /* tap interface name */
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if (strchr(optarg, '/') == NULL) {
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asprintf(&ep, "/dev/%s", optarg);
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interface_name = ep;
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} else
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interface_name = optarg;
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break;
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case 'l': /* limit server sessions */
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ul = strtoul(optarg, &ep, 10);
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if (*optarg == '\0' || *ep != '\0' || ul == 0)
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errx(EXIT_FAILURE, "%s: invalid session limit",
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optarg);
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server_limit = ul;
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break;
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case 'm': /* link mode */
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warnx("Setting link mode is not yet supported");
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break;
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case 'p': /* protocol/service multiplexer */
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ul = strtoul(optarg, &ep, 0);
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if (*optarg == '\0' || *ep != '\0'
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|| ul > 0xffff || L2CAP_PSM_INVALID(ul))
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errx(EXIT_FAILURE, "%s: invalid PSM", optarg);
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l2cap_psm = ul;
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break;
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case 's': /* service */
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case 'S': /* service (no SDP) */
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for (ul = 0; strcasecmp(optarg, services[ul].name); ul++) {
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if (ul == __arraycount(services))
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errx(EXIT_FAILURE, "%s: unknown service", optarg);
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}
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if (ch == 's')
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service_name = services[ul].name;
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service_class = services[ul].class;
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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}
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argc -= optind;
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argv += optind;
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/* validate options */
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if (bdaddr_any(&local_bdaddr) || service_class == 0)
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usage();
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if (!bdaddr_any(&remote_bdaddr) && (server_limit != 0 ||
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control_path != 0 || (service_name != NULL && l2cap_psm != 0)))
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usage();
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/* default options */
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if (interface_name == NULL)
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interface_name = "/dev/tap";
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if (l2cap_psm == 0)
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l2cap_psm = L2CAP_PSM_BNEP;
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if (bdaddr_any(&remote_bdaddr) && server_limit == 0) {
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if (service_class == SDP_SERVICE_CLASS_PANU)
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server_limit = 1;
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else
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server_limit = 7;
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}
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#ifdef L2CAP_LM_MASTER
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if (server_limit > 1 && service_class != SDP_SERVICE_CLASS_PANU)
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l2cap_mode |= L2CAP_LM_MASTER;
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#endif
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/*
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* fork() now so that the setup can be done in the child process
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* (as kqueue is not inherited) but block in the parent until the
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* setup is finished so we can return an error if necessary.
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*/
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switch(fork()) {
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case -1: /* bad */
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err(EXIT_FAILURE, "fork() failed");
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case 0: /* child */
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signal(SIGPIPE, SIG_IGN);
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openlog(getprogname(), LOG_NDELAY | LOG_PERROR | LOG_PID, LOG_DAEMON);
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channel_init();
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server_init();
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event_init();
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client_init();
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tap_init();
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main_detach();
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event_dispatch();
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break;
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default: /* parent */
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signal(SIGUSR1, main_exit);
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wait(&status);
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if (WIFEXITED(status))
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exit(WEXITSTATUS(status));
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break;
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}
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err(EXIT_FAILURE, "exiting");
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}
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static void
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main_exit(int s)
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{
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/* child is all grown up */
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_exit(EXIT_SUCCESS);
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}
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static void
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main_detach(void)
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{
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int fd;
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if (kill(getppid(), SIGUSR1) == -1)
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log_err("Could not signal main process: %m");
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if (setsid() == -1)
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log_err("setsid() failed");
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fd = open(_PATH_DEVNULL, O_RDWR, 0);
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if (fd == -1) {
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log_err("Could not open %s", _PATH_DEVNULL);
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} else {
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(void)dup2(fd, STDIN_FILENO);
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(void)dup2(fd, STDOUT_FILENO);
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(void)dup2(fd, STDERR_FILENO);
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close(fd);
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}
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}
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static void
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usage(void)
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{
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const char *p = getprogname();
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int n = strlen(p);
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fprintf(stderr,
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"usage: %s [-i ifname] [-m mode] -a address -d device\n"
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" %*s {-s service | -S service [-p psm]}\n"
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" %s [-c path] [-i ifname] [-l limit] [-m mode] [-p psm] -d device\n"
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" %*s {-s service | -S service}\n"
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"\n"
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"Where:\n"
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"\t-a address remote bluetooth device\n"
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"\t-c path SDP server socket\n"
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"\t-d device local bluetooth device\n"
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"\t-i ifname tap interface\n"
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"\t-l limit limit server sessions\n"
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"\t-m mode L2CAP link mode (NOT YET SUPPORTED)\n"
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"\t-p psm L2CAP PSM\n"
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"\t-S service service name (no SDP)\n"
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"\t-s service service name\n"
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"\n"
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"Known services:\n"
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"", p, n, "", p, n, "");
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for (n = 0; n < __arraycount(services); n++)
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fprintf(stderr, "\t%s\t%s\n", services[n].name, services[n].desc);
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exit(EXIT_FAILURE);
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}
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