NetBSD-5.0.2/usr.bin/bthset/bthset.c
/* $NetBSD: bthset.c,v 1.4 2008/07/21 14:19:21 lukem Exp $ */
/*-
* Copyright (c) 2006 Itronix Inc.
* All rights reserved.
*
* Written by Iain Hibbert for Itronix Inc.
*
* 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.
* 3. The name of Itronix Inc. may not be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC. 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) 2006 Itronix, Inc. All rights reserved.");
__RCSID("$NetBSD: bthset.c,v 1.4 2008/07/21 14:19:21 lukem Exp $");
#include <sys/types.h>
#include <sys/audioio.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <assert.h>
#include <bluetooth.h>
#include <err.h>
#include <event.h>
#include <fcntl.h>
#include <signal.h>
#include <sdp.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <dev/bluetooth/btdev.h>
#include <dev/bluetooth/btsco.h>
#include <netbt/rfcomm.h>
#define RING_INTERVAL 5 /* seconds */
int main(int, char *[]);
void usage(void);
void do_signal(int, short, void *);
void do_ring(int, short, void *);
void do_mixer(int, short, void *);
void do_rfcomm(int, short, void *);
void do_server(int, short, void *);
int send_rfcomm(const char *, ...);
int init_mixer(struct btsco_info *, const char *);
int init_rfcomm(struct btsco_info *);
int init_server(struct btsco_info *, int);
void remove_pid(void);
int write_pid(void);
struct event sigint_ev; /* bye bye */
struct event sigusr1_ev; /* start ringing */
struct event sigusr2_ev; /* stop ringing */
struct event mixer_ev; /* mixer changed */
struct event rfcomm_ev; /* headset speaks */
struct event server_ev; /* headset connecting */
struct event ring_ev; /* ring timer */
mixer_ctrl_t vgs; /* speaker control */
mixer_ctrl_t vgm; /* mic control */
int ringing; /* we are ringing */
int verbose; /* copy to stdout */
int mx; /* mixer fd */
int rf; /* rfcomm connection fd */
int ag; /* rfcomm gateway fd */
void *ss; /* sdp handle */
char *command; /* answer command */
char *pidfile; /* PID file name */
int
main(int ac, char *av[])
{
struct btsco_info info;
const char *mixer;
int ch, channel;
ag = rf = -1;
verbose = 0;
channel = 0;
pidfile = getenv("BTHSET_PIDFILE");
command = getenv("BTHSET_COMMAND");
mixer = getenv("BTHSET_MIXER");
if (mixer == NULL)
mixer = "/dev/mixer";
while ((ch = getopt(ac, av, "hc:m:p:s:v")) != EOF) {
switch (ch) {
case 'c':
command = optarg;
break;
case 'm':
mixer = optarg;
break;
case 'p':
pidfile = optarg;
break;
case 's':
channel = atoi(optarg);
break;
case 'v':
verbose = 1;
break;
case 'h':
default:
usage();
}
}
if (mixer == NULL)
usage();
if ((channel < RFCOMM_CHANNEL_MIN || channel > RFCOMM_CHANNEL_MAX)
&& channel != 0)
usage();
if (write_pid() < 0)
err(EXIT_FAILURE, "%s", pidfile);
event_init();
ringing = 0;
evtimer_set(&ring_ev, do_ring, NULL);
signal_set(&sigusr1_ev, SIGUSR1, do_signal, NULL);
if (signal_add(&sigusr1_ev, NULL) < 0)
err(EXIT_FAILURE, "SIGUSR1");
signal_set(&sigusr2_ev, SIGUSR2, do_signal, NULL);
if (signal_add(&sigusr2_ev, NULL) < 0)
err(EXIT_FAILURE, "SIGUSR2");
signal_set(&sigint_ev, SIGINT, do_signal, NULL);
if (signal_add(&sigint_ev, NULL) < 0)
err(EXIT_FAILURE, "SIGINT");
if (init_mixer(&info, mixer) < 0)
err(EXIT_FAILURE, "%s", mixer);
if (channel == 0 && init_rfcomm(&info) < 0)
err(EXIT_FAILURE, "%s", bt_ntoa(&info.raddr, NULL));
if (channel && init_server(&info, channel) < 0)
err(EXIT_FAILURE, "%d", channel);
if (verbose) {
printf("Headset Info:\n");
printf("\tmixer: %s\n", mixer);
printf("\tladdr: %s\n", bt_ntoa(&info.laddr, NULL));
printf("\traddr: %s\n", bt_ntoa(&info.raddr, NULL));
printf("\tchannel: %d\n", info.channel);
printf("\tvgs.dev: %d, vgm.dev: %d\n", vgs.dev, vgm.dev);
if (channel) printf("\tserver channel: %d\n", channel);
}
event_dispatch();
err(EXIT_FAILURE, "event_dispatch");
}
void
usage(void)
{
fprintf(stderr,
"usage: %s [-hv] [-c command] [-m mixer] [-p file] [-s channel]\n"
"Where:\n"
"\t-h display this message\n"
"\t-v verbose output\n"
"\t-c command command to execute on answer\n"
"\t-m mixer mixer path\n"
"\t-p file write PID to file\n"
"\t-s channel register as audio gateway on channel\n"
"", getprogname());
exit(EXIT_FAILURE);
}
void
do_signal(int s, short ev, void *arg)
{
switch (s) {
case SIGUSR1:
ringing = 1; /* start ringing */
do_ring(0, 0, NULL);
break;
case SIGUSR2:
ringing = 0;
break;
case SIGINT:
default:
exit(EXIT_SUCCESS);
}
}
void
do_ring(int s, short ev, void *arg)
{
static struct timeval tv = { RING_INTERVAL, 0 };
if (!ringing)
return;
send_rfcomm("RING");
evtimer_add(&ring_ev, &tv);
}
/*
* The mixer device has been twiddled. We check mic and speaker
* settings and send the appropriate commands to the headset,
*/
void
do_mixer(int s, short ev, void *arg)
{
mixer_ctrl_t mc;
int level;
memcpy(&mc, &vgs, sizeof(mc));
if (ioctl(mx, AUDIO_MIXER_READ, &mc) < 0)
return;
if (memcmp(&vgs, &mc, sizeof(mc))) {
memcpy(&vgs, &mc, sizeof(mc));
level = mc.un.value.level[AUDIO_MIXER_LEVEL_MONO] / BTSCO_DELTA;
send_rfcomm("+VGS=%d", level);
}
memcpy(&mc, &vgm, sizeof(mc));
if (ioctl(mx, AUDIO_MIXER_READ, &mc) < 0)
return;
if (memcmp(&vgm, &mc, sizeof(mc))) {
memcpy(&vgm, &mc, sizeof(mc));
level = mc.un.value.level[AUDIO_MIXER_LEVEL_MONO] / BTSCO_DELTA;
send_rfcomm("+VGM=%d", level);
}
}
/*
* RFCOMM socket event.
*/
void
do_rfcomm(int fd, short ev, void *arg)
{
char buf[128];
int len, level;
memset(buf, 0, sizeof(buf));
len = recv(rf, buf, sizeof(buf), 0);
if (len <= 0) {
if (ag < 0)
errx(EXIT_FAILURE, "Connection Lost");
event_del(&rfcomm_ev);
close(rf);
rf = -1;
ringing = 0;
return;
}
if (verbose)
printf("> %.*s\n", len, buf);
if (len >= 7 && strncmp(buf, "AT+CKPD", 7) == 0) {
if (ringing && command != NULL) {
if (verbose)
printf("%% %s\n", command);
system(command);
}
ringing = 0;
send_rfcomm("OK");
return;
}
if (len >= 7 && strncmp(buf, "AT+VGS=", 7) == 0) {
level = atoi(buf + 7);
if (level < 0 || level > 15)
return;
vgs.un.value.level[AUDIO_MIXER_LEVEL_MONO] = level * BTSCO_DELTA;
if (ioctl(mx, AUDIO_MIXER_WRITE, &vgs) < 0)
return;
send_rfcomm("OK");
return;
}
if (len >= 7 && strncmp(buf, "AT+VGM=", 7) == 0) {
level = atoi(buf + 7);
if (level < 0 || level > 15)
return;
vgm.un.value.level[AUDIO_MIXER_LEVEL_MONO] = level * BTSCO_DELTA;
if (ioctl(mx, AUDIO_MIXER_WRITE, &vgm) < 0)
return;
send_rfcomm("OK");
return;
}
send_rfcomm("ERROR");
}
/*
* got an incoming connection on the AG socket.
*/
void
do_server(int fd, short ev, void *arg)
{
bdaddr_t *raddr = arg;
struct sockaddr_bt addr;
socklen_t len;
int s;
assert(raddr != NULL);
len = sizeof(addr);
s = accept(fd, (struct sockaddr *)&addr, &len);
if (s < 0)
return;
if (rf >= 0
|| len != sizeof(addr)
|| addr.bt_len != sizeof(addr)
|| addr.bt_family != AF_BLUETOOTH
|| !bdaddr_same(raddr, &addr.bt_bdaddr)) {
close(s);
return;
}
rf = s;
event_set(&rfcomm_ev, rf, EV_READ | EV_PERSIST, do_rfcomm, NULL);
if (event_add(&rfcomm_ev, NULL) < 0)
err(EXIT_FAILURE, "rfcomm_ev");
}
/*
* send a message to the RFCOMM socket
*/
int
send_rfcomm(const char *msg, ...)
{
char buf[128], fmt[128];
va_list ap;
int len;
va_start(ap, msg);
if (verbose) {
snprintf(fmt, sizeof(fmt), "< %s\n", msg);
vprintf(fmt, ap);
}
snprintf(fmt, sizeof(fmt), "\r\n%s\r\n", msg);
vsnprintf(buf, sizeof(buf), fmt, ap);
len = send(rf, buf, strlen(buf), 0);
va_end(ap);
return len;
}
/*
* Initialise mixer event
*/
int
init_mixer(struct btsco_info *info, const char *mixer)
{
mx = open(mixer, O_WRONLY, 0);
if (mx < 0)
return -1;
if (ioctl(mx, BTSCO_GETINFO, info) < 0)
return -1;
/* get initial vol settings */
memset(&vgs, 0, sizeof(vgs));
vgs.dev = info->vgs;
if (ioctl(mx, AUDIO_MIXER_READ, &vgs) < 0)
return -1;
memset(&vgm, 0, sizeof(vgm));
vgm.dev = info->vgm;
if (ioctl(mx, AUDIO_MIXER_READ, &vgm) < 0)
return -1;
/* set up mixer changed event */
if (fcntl(mx, F_SETFL, O_ASYNC) < 0)
return -1;
signal_set(&mixer_ev, SIGIO, do_mixer, NULL);
if (signal_add(&mixer_ev, NULL) < 0)
return -1;
return 0;
}
/*
* Initialise RFCOMM socket
*/
int
init_rfcomm(struct btsco_info *info)
{
struct sockaddr_bt addr;
rf = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
if (rf < 0)
return -1;
memset(&addr, 0, sizeof(addr));
addr.bt_len = sizeof(addr);
addr.bt_family = AF_BLUETOOTH;
bdaddr_copy(&addr.bt_bdaddr, &info->laddr);
if (bind(rf, (struct sockaddr *)&addr, sizeof(addr)) < 0)
return -1;
bdaddr_copy(&addr.bt_bdaddr, &info->raddr);
addr.bt_channel = info->channel;
if (connect(rf, (struct sockaddr *)&addr, sizeof(addr)) < 0)
return -1;
event_set(&rfcomm_ev, rf, EV_READ | EV_PERSIST, do_rfcomm, NULL);
if (event_add(&rfcomm_ev, NULL) < 0)
return -1;
return 0;
}
/*
* Initialise server socket
*/
int
init_server(struct btsco_info *info, int channel)
{
sdp_hset_profile_t hset;
struct sockaddr_bt addr;
ag = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
if (ag < 0)
return -1;
memset(&addr, 0, sizeof(addr));
addr.bt_len = sizeof(addr);
addr.bt_family = AF_BLUETOOTH;
addr.bt_channel = channel;
bdaddr_copy(&addr.bt_bdaddr, &info->laddr);
if (bind(ag, (struct sockaddr *)&addr, sizeof(addr)) < 0)
return -1;
if (listen(ag, 1) < 0)
return -1;
event_set(&server_ev, ag, EV_READ | EV_PERSIST, do_server, &info->raddr);
if (event_add(&server_ev, NULL) < 0)
return -1;
memset(&hset, 0, sizeof(hset));
hset.server_channel = channel;
ss = sdp_open_local(NULL);
if (ss == NULL || (errno = sdp_error(ss)))
return -1;
if (sdp_register_service(ss,
SDP_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY,
&info->laddr, (uint8_t *)&hset, sizeof(hset), NULL) != 0) {
errno = sdp_error(ss);
sdp_close(ss);
return -1;
}
return 0;
}
void
remove_pid(void)
{
if (pidfile == NULL)
return;
unlink(pidfile);
}
int
write_pid(void)
{
char *buf;
int fd, len;
if (pidfile == NULL)
return 0;
fd = open(pidfile, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd < 0)
return -1;
len = asprintf(&buf, "%d\n", getpid());
if (len > 0)
write(fd, buf, len);
if (len >= 0 && buf != NULL)
free(buf);
close (fd);
return atexit(remove_pid);
}