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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2003-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <signal.h>
#include <getopt.h>
#include <sys/poll.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
#include <bluetooth/l2cap.h>
#include <bluetooth/sdp.h>
#include <bluetooth/hidp.h>
#include "sdp.h"
#include "hidd.h"
#ifdef NEED_PPOLL
#include "ppoll.h"
#endif
enum {
NONE,
SHOW,
SERVER,
SEARCH,
CONNECT,
KILL
};
static volatile sig_atomic_t __io_canceled = 0;
static void sig_hup(int sig)
{
}
static void sig_term(int sig)
{
__io_canceled = 1;
}
static int l2cap_connect(bdaddr_t *src, bdaddr_t *dst, unsigned short psm)
{
struct sockaddr_l2 addr;
struct l2cap_options opts;
int sk;
if ((sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) < 0)
return -1;
memset(&addr, 0, sizeof(addr));
addr.l2_family = AF_BLUETOOTH;
bacpy(&addr.l2_bdaddr, src);
if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
close(sk);
return -1;
}
memset(&opts, 0, sizeof(opts));
opts.imtu = HIDP_DEFAULT_MTU;
opts.omtu = HIDP_DEFAULT_MTU;
opts.flush_to = 0xffff;
setsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &opts, sizeof(opts));
memset(&addr, 0, sizeof(addr));
addr.l2_family = AF_BLUETOOTH;
bacpy(&addr.l2_bdaddr, dst);
addr.l2_psm = htobs(psm);
if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
close(sk);
return -1;
}
return sk;
}
static int l2cap_listen(const bdaddr_t *bdaddr, unsigned short psm, int lm, int backlog)
{
struct sockaddr_l2 addr;
struct l2cap_options opts;
int sk;
if ((sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) < 0)
return -1;
memset(&addr, 0, sizeof(addr));
addr.l2_family = AF_BLUETOOTH;
bacpy(&addr.l2_bdaddr, bdaddr);
addr.l2_psm = htobs(psm);
if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
close(sk);
return -1;
}
setsockopt(sk, SOL_L2CAP, L2CAP_LM, &lm, sizeof(lm));
memset(&opts, 0, sizeof(opts));
opts.imtu = HIDP_DEFAULT_MTU;
opts.omtu = HIDP_DEFAULT_MTU;
opts.flush_to = 0xffff;
setsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &opts, sizeof(opts));
if (listen(sk, backlog) < 0) {
close(sk);
return -1;
}
return sk;
}
static int l2cap_accept(int sk, bdaddr_t *bdaddr)
{
struct sockaddr_l2 addr;
socklen_t addrlen;
int nsk;
memset(&addr, 0, sizeof(addr));
addrlen = sizeof(addr);
if ((nsk = accept(sk, (struct sockaddr *) &addr, &addrlen)) < 0)
return -1;
if (bdaddr)
bacpy(bdaddr, &addr.l2_bdaddr);
return nsk;
}
static int request_authentication(bdaddr_t *src, bdaddr_t *dst)
{
struct hci_conn_info_req *cr;
char addr[18];
int err, dd, dev_id;
ba2str(src, addr);
dev_id = hci_devid(addr);
if (dev_id < 0)
return dev_id;
dd = hci_open_dev(dev_id);
if (dd < 0)
return dd;
cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
if (!cr)
return -ENOMEM;
bacpy(&cr->bdaddr, dst);
cr->type = ACL_LINK;
err = ioctl(dd, HCIGETCONNINFO, (unsigned long) cr);
if (err < 0) {
free(cr);
hci_close_dev(dd);
return err;
}
err = hci_authenticate_link(dd, htobs(cr->conn_info->handle), 25000);
free(cr);
hci_close_dev(dd);
return err;
}
static int request_encryption(bdaddr_t *src, bdaddr_t *dst)
{
struct hci_conn_info_req *cr;
char addr[18];
int err, dd, dev_id;
ba2str(src, addr);
dev_id = hci_devid(addr);
if (dev_id < 0)
return dev_id;
dd = hci_open_dev(dev_id);
if (dd < 0)
return dd;
cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
if (!cr)
return -ENOMEM;
bacpy(&cr->bdaddr, dst);
cr->type = ACL_LINK;
err = ioctl(dd, HCIGETCONNINFO, (unsigned long) cr);
if (err < 0) {
free(cr);
hci_close_dev(dd);
return err;
}
err = hci_encrypt_link(dd, htobs(cr->conn_info->handle), 1, 25000);
free(cr);
hci_close_dev(dd);
return err;
}
static int enable_sixaxis(int csk)
{
const unsigned char buf[] = {
0x53 /*HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE*/,
0xf4, 0x42, 0x03, 0x00, 0x00 };
return write(csk, buf, sizeof(buf));
}
static int create_device(int ctl, int csk, int isk, uint8_t subclass, int nosdp, int nocheck, int bootonly, int encrypt, int timeout)
{
struct hidp_connadd_req req;
struct sockaddr_l2 addr;
socklen_t addrlen;
bdaddr_t src, dst;
char bda[18];
int err;
memset(&addr, 0, sizeof(addr));
addrlen = sizeof(addr);
if (getsockname(csk, (struct sockaddr *) &addr, &addrlen) < 0)
return -1;
bacpy(&src, &addr.l2_bdaddr);
memset(&addr, 0, sizeof(addr));
addrlen = sizeof(addr);
if (getpeername(csk, (struct sockaddr *) &addr, &addrlen) < 0)
return -1;
bacpy(&dst, &addr.l2_bdaddr);
memset(&req, 0, sizeof(req));
req.ctrl_sock = csk;
req.intr_sock = isk;
req.flags = 0;
req.idle_to = timeout * 60;
err = get_stored_device_info(&src, &dst, &req);
if (!err)
goto create;
if (!nocheck) {
ba2str(&dst, bda);
syslog(LOG_ERR, "Rejected connection from unknown device %s", bda);
/* Return no error to avoid run_server() complaining too */
return 0;
}
if (!nosdp) {
err = get_sdp_device_info(&src, &dst, &req);
if (err < 0)
goto error;
} else {
struct l2cap_conninfo conn;
socklen_t size;
uint8_t class[3];
memset(&conn, 0, sizeof(conn));
size = sizeof(conn);
if (getsockopt(csk, SOL_L2CAP, L2CAP_CONNINFO, &conn, &size) < 0)
memset(class, 0, 3);
else
memcpy(class, conn.dev_class, 3);
if (class[1] == 0x25 && (class[2] == 0x00 || class[2] == 0x01))
req.subclass = class[0];
else
req.subclass = 0xc0;
}
create:
if (subclass != 0x00)
req.subclass = subclass;
ba2str(&dst, bda);
syslog(LOG_INFO, "New HID device %s (%s)", bda, req.name);
if (encrypt && (req.subclass & 0x40)) {
err = request_authentication(&src, &dst);
if (err < 0) {
syslog(LOG_ERR, "Authentication for %s failed", bda);
goto error;
}
err = request_encryption(&src, &dst);
if (err < 0)
syslog(LOG_ERR, "Encryption for %s failed", bda);
}
if (bootonly) {
req.rd_size = 0;
req.flags |= (1 << HIDP_BOOT_PROTOCOL_MODE);
}
if (req.vendor == 0x054c && req.product == 0x0268)
enable_sixaxis(csk);
err = ioctl(ctl, HIDPCONNADD, &req);
error:
free(req.rd_data);
return err;
}
static void run_server(int ctl, int csk, int isk, uint8_t subclass, int nosdp, int nocheck, int bootonly, int encrypt, int timeout)
{
struct pollfd p[2];
sigset_t sigs;
short events;
int err, ncsk, nisk;
sigfillset(&sigs);
sigdelset(&sigs, SIGCHLD);
sigdelset(&sigs, SIGPIPE);
sigdelset(&sigs, SIGTERM);
sigdelset(&sigs, SIGINT);
sigdelset(&sigs, SIGHUP);
p[0].fd = csk;
p[0].events = POLLIN | POLLERR | POLLHUP;
p[1].fd = isk;
p[1].events = POLLIN | POLLERR | POLLHUP;
while (!__io_canceled) {
p[0].revents = 0;
p[1].revents = 0;
if (ppoll(p, 2, NULL, &sigs) < 1)
continue;
events = p[0].revents | p[1].revents;
if (events & POLLIN) {
ncsk = l2cap_accept(csk, NULL);
nisk = l2cap_accept(isk, NULL);
err = create_device(ctl, ncsk, nisk, subclass, nosdp, nocheck, bootonly, encrypt, timeout);
if (err < 0)
syslog(LOG_ERR, "HID create error %d (%s)",
errno, strerror(errno));
close(nisk);
sleep(1);
close(ncsk);
}
}
}
static char *hidp_state[] = {
"unknown",
"connected",
"open",
"bound",
"listening",
"connecting",
"connecting",
"config",
"disconnecting",
"closed"
};
static char *hidp_flagstostr(uint32_t flags)
{
static char str[100];
str[0] = 0;
strcat(str, "[");
if (flags & (1 << HIDP_BOOT_PROTOCOL_MODE))
strcat(str, "boot-protocol");
strcat(str, "]");
return str;
}
static void do_show(int ctl)
{
struct hidp_connlist_req req;
struct hidp_conninfo ci[16];
char addr[18];
unsigned int i;
req.cnum = 16;
req.ci = ci;
if (ioctl(ctl, HIDPGETCONNLIST, &req) < 0) {
perror("Can't get connection list");
close(ctl);
exit(1);
}
for (i = 0; i < req.cnum; i++) {
ba2str(&ci[i].bdaddr, addr);
printf("%s %s [%04x:%04x] %s %s\n", addr, ci[i].name,
ci[i].vendor, ci[i].product, hidp_state[ci[i].state],
ci[i].flags ? hidp_flagstostr(ci[i].flags) : "");
}
}
static void do_connect(int ctl, bdaddr_t *src, bdaddr_t *dst, uint8_t subclass, int fakehid, int bootonly, int encrypt, int timeout)
{
struct hidp_connadd_req req;
uint16_t uuid = HID_SVCLASS_ID;
uint8_t channel = 0;
char name[256];
int csk, isk, err;
memset(&req, 0, sizeof(req));
name[0] = '\0';
err = get_sdp_device_info(src, dst, &req);
if (err < 0 && fakehid)
err = get_alternate_device_info(src, dst,
&uuid, &channel, name, sizeof(name) - 1);
if (err < 0) {
perror("Can't get device information");
close(ctl);
exit(1);
}
switch (uuid) {
case HID_SVCLASS_ID:
goto connect;
case SERIAL_PORT_SVCLASS_ID:
if (subclass == 0x40 || !strcmp(name, "Cable Replacement")) {
if (epox_presenter(src, dst, channel) < 0) {
close(ctl);
exit(1);
}
break;
}
if (subclass == 0x1f || !strcmp(name, "SPP slave")) {
if (jthree_keyboard(src, dst, channel) < 0) {
close(ctl);
exit(1);
}
break;
}
if (subclass == 0x02 || !strcmp(name, "Serial Port")) {
if (celluon_keyboard(src, dst, channel) < 0) {
close(ctl);
exit(1);
}
break;
}
break;
case HEADSET_SVCLASS_ID:
case HANDSFREE_SVCLASS_ID:
if (headset_presenter(src, dst, channel) < 0) {
close(ctl);
exit(1);
}
break;
}
return;
connect:
csk = l2cap_connect(src, dst, L2CAP_PSM_HIDP_CTRL);
if (csk < 0) {
perror("Can't create HID control channel");
close(ctl);
exit(1);
}
isk = l2cap_connect(src, dst, L2CAP_PSM_HIDP_INTR);
if (isk < 0) {
perror("Can't create HID interrupt channel");
close(csk);
close(ctl);
exit(1);
}
err = create_device(ctl, csk, isk, subclass, 1, 1, bootonly, encrypt, timeout);
if (err < 0) {
fprintf(stderr, "HID create error %d (%s)\n",
errno, strerror(errno));
close(isk);
sleep(1);
close(csk);
close(ctl);
exit(1);
}
}
static void do_search(int ctl, bdaddr_t *bdaddr, uint8_t subclass, int fakehid, int bootonly, int encrypt, int timeout)
{
inquiry_info *info = NULL;
bdaddr_t src, dst;
int i, dev_id, num_rsp, length, flags;
char addr[18];
uint8_t class[3];
ba2str(bdaddr, addr);
dev_id = hci_devid(addr);
if (dev_id < 0) {
dev_id = hci_get_route(NULL);
hci_devba(dev_id, &src);
} else
bacpy(&src, bdaddr);
length = 8; /* ~10 seconds */
num_rsp = 0;
flags = IREQ_CACHE_FLUSH;
printf("Searching ...\n");
num_rsp = hci_inquiry(dev_id, length, num_rsp, NULL, &info, flags);
for (i = 0; i < num_rsp; i++) {
memcpy(class, (info+i)->dev_class, 3);
if (class[1] == 0x25 && (class[2] == 0x00 || class[2] == 0x01)) {
bacpy(&dst, &(info+i)->bdaddr);
ba2str(&dst, addr);
printf("\tConnecting to device %s\n", addr);
do_connect(ctl, &src, &dst, subclass, fakehid, bootonly, encrypt, timeout);
}
}
if (!fakehid)
goto done;
for (i = 0; i < num_rsp; i++) {
memcpy(class, (info+i)->dev_class, 3);
if ((class[0] == 0x00 && class[2] == 0x00 &&
(class[1] == 0x40 || class[1] == 0x1f)) ||
(class[0] == 0x10 && class[1] == 0x02 && class[2] == 0x40)) {
bacpy(&dst, &(info+i)->bdaddr);
ba2str(&dst, addr);
printf("\tConnecting to device %s\n", addr);
do_connect(ctl, &src, &dst, subclass, 1, bootonly, 0, timeout);
}
}
done:
bt_free(info);
if (!num_rsp) {
fprintf(stderr, "\tNo devices in range or visible\n");
close(ctl);
exit(1);
}
}
static void do_kill(int ctl, bdaddr_t *bdaddr, uint32_t flags)
{
struct hidp_conndel_req req;
struct hidp_connlist_req cl;
struct hidp_conninfo ci[16];
unsigned int i;
if (!bacmp(bdaddr, BDADDR_ALL)) {
cl.cnum = 16;
cl.ci = ci;
if (ioctl(ctl, HIDPGETCONNLIST, &cl) < 0) {
perror("Can't get connection list");
close(ctl);
exit(1);
}
for (i = 0; i < cl.cnum; i++) {
bacpy(&req.bdaddr, &ci[i].bdaddr);
req.flags = flags;
if (ioctl(ctl, HIDPCONNDEL, &req) < 0) {
perror("Can't release connection");
close(ctl);
exit(1);
}
}
} else {
bacpy(&req.bdaddr, bdaddr);
req.flags = flags;
if (ioctl(ctl, HIDPCONNDEL, &req) < 0) {
perror("Can't release connection");
close(ctl);
exit(1);
}
}
}
static void usage(void)
{
printf("hidd - Bluetooth HID daemon version %s\n\n", VERSION);
printf("Usage:\n"
"\thidd [options] [commands]\n"
"\n");
printf("Options:\n"
"\t-i <hciX|bdaddr> Local HCI device or BD Address\n"
"\t-t <timeout> Set idle timeout (in minutes)\n"
"\t-b <subclass> Overwrite the boot mode subclass\n"
"\t-n, --nodaemon Don't fork daemon to background\n"
"\t-h, --help Display help\n"
"\n");
printf("Commands:\n"
"\t--server Start HID server\n"
"\t--search Search for HID devices\n"
"\t--connect <bdaddr> Connect remote HID device\n"
"\t--unplug <bdaddr> Unplug the HID connection\n"
"\t--kill <bdaddr> Terminate HID connection\n"
"\t--killall Terminate all connections\n"
"\t--show List current HID connections\n"
"\n");
}
static struct option main_options[] = {
{ "help", 0, 0, 'h' },
{ "nodaemon", 0, 0, 'n' },
{ "subclass", 1, 0, 'b' },
{ "timeout", 1, 0, 't' },
{ "device", 1, 0, 'i' },
{ "master", 0, 0, 'M' },
{ "encrypt", 0, 0, 'E' },
{ "nosdp", 0, 0, 'D' },
{ "nocheck", 0, 0, 'Z' },
{ "bootonly", 0, 0, 'B' },
{ "hidonly", 0, 0, 'H' },
{ "show", 0, 0, 'l' },
{ "list", 0, 0, 'l' },
{ "server", 0, 0, 'd' },
{ "listen", 0, 0, 'd' },
{ "search", 0, 0, 's' },
{ "create", 1, 0, 'c' },
{ "connect", 1, 0, 'c' },
{ "disconnect", 1, 0, 'k' },
{ "terminate", 1, 0, 'k' },
{ "release", 1, 0, 'k' },
{ "kill", 1, 0, 'k' },
{ "killall", 0, 0, 'K' },
{ "unplug", 1, 0, 'u' },
{ 0, 0, 0, 0 }
};
int main(int argc, char *argv[])
{
struct sigaction sa;
bdaddr_t bdaddr, dev;
uint32_t flags = 0;
uint8_t subclass = 0x00;
char addr[18];
int log_option = LOG_NDELAY | LOG_PID;
int opt, ctl, csk, isk;
int mode = SHOW, detach = 1, nosdp = 0, nocheck = 0, bootonly = 0;
int fakehid = 1, encrypt = 0, timeout = 30, lm = 0;
bacpy(&bdaddr, BDADDR_ANY);
while ((opt = getopt_long(argc, argv, "+i:nt:b:MEDZBHldsc:k:Ku:h", main_options, NULL)) != -1) {
switch(opt) {
case 'i':
if (!strncasecmp(optarg, "hci", 3))
hci_devba(atoi(optarg + 3), &bdaddr);
else
str2ba(optarg, &bdaddr);
break;
case 'n':
detach = 0;
break;
case 't':
timeout = atoi(optarg);
break;
case 'b':
if (!strncasecmp(optarg, "0x", 2))
subclass = (uint8_t) strtol(optarg, NULL, 16);
else
subclass = atoi(optarg);
break;
case 'M':
lm |= L2CAP_LM_MASTER;
break;
case 'E':
encrypt = 1;
break;
case 'D':
nosdp = 1;
break;
case 'Z':
nocheck = 1;
break;
case 'B':
bootonly = 1;
break;
case 'H':
fakehid = 0;
break;
case 'l':
mode = SHOW;
break;
case 'd':
mode = SERVER;
break;
case 's':
mode = SEARCH;
break;
case 'c':
str2ba(optarg, &dev);
mode = CONNECT;
break;
case 'k':
str2ba(optarg, &dev);
mode = KILL;
break;
case 'K':
bacpy(&dev, BDADDR_ALL);
mode = KILL;
break;
case 'u':
str2ba(optarg, &dev);
flags = (1 << HIDP_VIRTUAL_CABLE_UNPLUG);
mode = KILL;
break;
case 'h':
usage();
exit(0);
default:
exit(0);
}
}
ba2str(&bdaddr, addr);
ctl = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HIDP);
if (ctl < 0) {
perror("Can't open HIDP control socket");
exit(1);
}
switch (mode) {
case SERVER:
csk = l2cap_listen(&bdaddr, L2CAP_PSM_HIDP_CTRL, lm, 10);
if (csk < 0) {
perror("Can't listen on HID control channel");
close(ctl);
exit(1);
}
isk = l2cap_listen(&bdaddr, L2CAP_PSM_HIDP_INTR, lm, 10);
if (isk < 0) {
perror("Can't listen on HID interrupt channel");
close(ctl);
close(csk);
exit(1);
}
break;
case SEARCH:
do_search(ctl, &bdaddr, subclass, fakehid, bootonly, encrypt, timeout);
close(ctl);
exit(0);
case CONNECT:
do_connect(ctl, &bdaddr, &dev, subclass, fakehid, bootonly, encrypt, timeout);
close(ctl);
exit(0);
case KILL:
do_kill(ctl, &dev, flags);
close(ctl);
exit(0);
default:
do_show(ctl);
close(ctl);
exit(0);
}
if (detach) {
if (daemon(0, 0)) {
perror("Can't start daemon");
exit(1);
}
} else
log_option |= LOG_PERROR;
openlog("hidd", log_option, LOG_DAEMON);
if (bacmp(&bdaddr, BDADDR_ANY))
syslog(LOG_INFO, "Bluetooth HID daemon (%s)", addr);
else
syslog(LOG_INFO, "Bluetooth HID daemon");
memset(&sa, 0, sizeof(sa));
sa.sa_flags = SA_NOCLDSTOP;
sa.sa_handler = sig_term;
sigaction(SIGTERM, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sa.sa_handler = sig_hup;
sigaction(SIGHUP, &sa, NULL);
sa.sa_handler = SIG_IGN;
sigaction(SIGCHLD, &sa, NULL);
sigaction(SIGPIPE, &sa, NULL);
run_server(ctl, csk, isk, subclass, nosdp, nocheck, bootonly, encrypt, timeout);
syslog(LOG_INFO, "Exit");
close(csk);
close(isk);
close(ctl);
return 0;
}
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