NetBSD-5.0.2/usr.sbin/btpand/btpand.c
/* $NetBSD: btpand.c,v 1.1 2008/08/17 13:20:57 plunky Exp $ */
/*-
* Copyright (c) 2008 Iain Hibbert
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__COPYRIGHT("@(#) Copyright (c) 2008 Iain Hibbert. All rights reserved.");
__RCSID("$NetBSD: btpand.c,v 1.1 2008/08/17 13:20:57 plunky Exp $");
#include <sys/wait.h>
#include <bluetooth.h>
#include <err.h>
#include <fcntl.h>
#include <paths.h>
#include <sdp.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "btpand.h"
/* global variables */
const char * control_path; /* -c <path> */
const char * interface_name; /* -i <ifname> */
const char * service_name; /* -s <service> */
uint16_t service_class;
bdaddr_t local_bdaddr; /* -d <addr> */
bdaddr_t remote_bdaddr; /* -a <addr> */
uint16_t l2cap_psm; /* -p <psm> */
int l2cap_mode; /* -m <mode> */
int server_limit; /* -n <limit> */
static const struct {
const char * name;
uint16_t class;
const char * desc;
} services[] = {
{ "PANU", SDP_SERVICE_CLASS_PANU, "Personal Area Networking User" },
{ "NAP", SDP_SERVICE_CLASS_NAP, "Network Acess Point" },
{ "GN", SDP_SERVICE_CLASS_GN, "Group Network" },
};
static void main_exit(int);
static void main_detach(void);
static void usage(void);
int
main(int argc, char *argv[])
{
unsigned long ul;
char * ep;
int ch, status;
while ((ch = getopt(argc, argv, "a:c:d:i:l:m:p:S:s:")) != -1) {
switch (ch) {
case 'a': /* remote address */
if (!bt_aton(optarg, &remote_bdaddr)) {
struct hostent *he;
if ((he = bt_gethostbyname(optarg)) == NULL)
errx(EXIT_FAILURE, "%s: %s",
optarg, hstrerror(h_errno));
bdaddr_copy(&remote_bdaddr, (bdaddr_t *)he->h_addr);
}
break;
case 'c': /* control socket path */
control_path = optarg;
break;
case 'd': /* local address */
if (!bt_devaddr(optarg, &local_bdaddr))
err(EXIT_FAILURE, "%s", optarg);
break;
case 'i': /* tap interface name */
if (strchr(optarg, '/') == NULL) {
asprintf(&ep, "/dev/%s", optarg);
interface_name = ep;
} else {
interface_name = optarg;
}
break;
case 'l': /* limit server sessions */
ul = strtoul(optarg, &ep, 10);
if (*optarg == '\0' || *ep != '\0' || ul == 0)
errx(EXIT_FAILURE, "%s: invalid session limit", optarg);
server_limit = ul;
break;
case 'm': /* link mode */
if (strcasecmp(optarg, "auth") == 0)
l2cap_mode = L2CAP_LM_AUTH;
else if (strcasecmp(optarg, "encrypt") == 0)
l2cap_mode = L2CAP_LM_ENCRYPT;
else if (strcasecmp(optarg, "secure") == 0)
l2cap_mode = L2CAP_LM_SECURE;
else if (strcasecmp(optarg, "none"))
errx(EXIT_FAILURE, "%s: unknown mode", optarg);
break;
case 'p': /* protocol/service multiplexer */
ul = strtoul(optarg, &ep, 0);
if (*optarg == '\0' || *ep != '\0'
|| ul > 0xffff || L2CAP_PSM_INVALID(ul))
errx(EXIT_FAILURE, "%s: invalid PSM", optarg);
l2cap_psm = ul;
break;
case 's': /* service */
case 'S': /* service (no SDP) */
for (ul = 0; strcasecmp(optarg, services[ul].name); ul++) {
if (ul == __arraycount(services))
errx(EXIT_FAILURE, "%s: unknown service", optarg);
}
if (ch == 's')
service_name = services[ul].name;
service_class = services[ul].class;
break;
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
/* validate options */
if (bdaddr_any(&local_bdaddr) || service_class == 0)
usage();
if (!bdaddr_any(&remote_bdaddr) && (server_limit != 0 ||
control_path != 0 || (service_name != NULL && l2cap_psm != 0)))
usage();
/* default options */
if (interface_name == NULL)
interface_name = "/dev/tap";
if (l2cap_psm == 0)
l2cap_psm = L2CAP_PSM_BNEP;
if (bdaddr_any(&remote_bdaddr) && server_limit == 0) {
if (service_class == SDP_SERVICE_CLASS_PANU)
server_limit = 1;
else
server_limit = 7;
}
#ifdef L2CAP_LM_MASTER
if (server_limit > 1 && service_class != SDP_SERVICE_CLASS_PANU)
l2cap_mode |= L2CAP_LM_MASTER;
#endif
/*
* fork() now so that the setup can be done in the child process
* (as kqueue is not inherited) but block in the parent until the
* setup is finished so we can return an error if necessary.
*/
switch(fork()) {
case -1: /* bad */
err(EXIT_FAILURE, "fork() failed");
case 0: /* child */
openlog(getprogname(), LOG_NDELAY | LOG_PERROR | LOG_PID, LOG_DAEMON);
channel_init();
server_init();
event_init();
client_init();
tap_init();
main_detach();
event_dispatch();
break;
default: /* parent */
signal(SIGUSR1, main_exit);
wait(&status);
if (WIFEXITED(status))
exit(WEXITSTATUS(status));
break;
}
err(EXIT_FAILURE, "exiting");
}
static void
main_exit(int s)
{
/* child is all grown up */
_exit(EXIT_SUCCESS);
}
static void
main_detach(void)
{
int fd;
if (kill(getppid(), SIGUSR1) == -1)
log_err("Could not signal main process: %m");
if (setsid() == -1)
log_err("setsid() failed");
fd = open(_PATH_DEVNULL, O_RDWR, 0);
if (fd == -1) {
log_err("Could not open %s", _PATH_DEVNULL);
} else {
(void)dup2(fd, STDIN_FILENO);
(void)dup2(fd, STDOUT_FILENO);
(void)dup2(fd, STDERR_FILENO);
close(fd);
}
}
static void
usage(void)
{
const char *p = getprogname();
int n = strlen(p);
fprintf(stderr,
"usage: %s [-i ifname] [-m mode] -a address -d device\n"
" %*s {-s service | -S service [-p psm]}\n"
" %s [-c path] [-i ifname] [-l limit] [-m mode] [-p psm] -d device\n"
" %*s {-s service | -S service}\n"
"\n"
"Where:\n"
"\t-a address remote bluetooth device\n"
"\t-c path SDP server socket\n"
"\t-d device local bluetooth device\n"
"\t-i ifname tap interface\n"
"\t-l limit limit server sessions\n"
"\t-m mode L2CAP link mode\n"
"\t-p psm L2CAP PSM\n"
"\t-S service service name (no SDP)\n"
"\t-s service service name\n"
"\n"
"Known services:\n"
"", p, n, "", p, n, "");
for (n = 0; n < __arraycount(services); n++)
fprintf(stderr, "\t%s\t%s\n", services[n].name, services[n].desc);
exit(EXIT_FAILURE);
}