/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2003-2008 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
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/sdp.h>
#include <bluetooth/sdp_lib.h>
#include <gdbus.h>
#include "cups.h"
#include "sdp-xml.h"
extern int sdp_search_spp(sdp_session_t *sdp, uint8_t *channel);
extern int sdp_search_hcrp(sdp_session_t *sdp, unsigned short *ctrl_psm, unsigned short *data_psm);
extern int spp_print(bdaddr_t *src, bdaddr_t *dst, uint8_t channel, int fd, int copies, const char *cups_class);
extern int hcrp_print(bdaddr_t *src, bdaddr_t *dst, unsigned short ctrl_psm, unsigned short data_psm, int fd, int copies, const char *cups_class);
#define PRINTER_SERVICE_CLASS_NAME "printer"
struct cups_device {
char *bdaddr;
char *name;
char *id;
};
static GSList *device_list = NULL;
static GMainLoop *loop = NULL;
static DBusConnection *conn = NULL;
#define ATTRID_1284ID 0x0300
static char *parse_xml_sdp(const char *xml)
{
sdp_record_t *sdp_record;
sdp_list_t *l;
char *str = NULL;
sdp_record = sdp_xml_parse_record(xml, strlen(xml));
if (sdp_record == NULL)
return NULL;
for (l = sdp_record->attrlist; l != NULL; l = l->next) {
sdp_data_t *data;
data = (sdp_data_t *) l->data;
if (data->attrId != ATTRID_1284ID)
continue;
/* Ignore the length, it's null terminated */
str = g_strdup(data->val.str + 2);
break;
}
sdp_record_free(sdp_record);
return str;
}
static char *device_get_ieee1284_id(const char *adapter, const char *bdaddr)
{
guint service_handle;
DBusMessage *message, *reply;
DBusMessageIter iter, reply_iter, iter_array;
const char *hcr_print = "00001126-0000-1000-8000-00805f9b34fb";
char *xml, *id;
/* Look for the service handle of the HCRP service */
message = dbus_message_new_method_call("org.bluez", adapter,
"org.bluez.Adapter",
"GetRemoteServiceHandles");
dbus_message_iter_init_append(message, &iter);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &bdaddr);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &hcr_print);
reply = dbus_connection_send_with_reply_and_block(conn,
message, -1, NULL);
dbus_message_unref(message);
if (!reply)
return NULL;
dbus_message_iter_init(reply, &reply_iter);
if (dbus_message_iter_get_arg_type(&reply_iter) != DBUS_TYPE_ARRAY) {
dbus_message_unref(reply);
return NULL;
}
/* Hopefully we only get one handle, or take a punt */
dbus_message_iter_recurse(&reply_iter, &iter_array);
while (dbus_message_iter_get_arg_type(&iter_array) == DBUS_TYPE_UINT32) {
dbus_message_iter_get_basic(&iter_array, &service_handle);
dbus_message_iter_next(&iter_array);
}
dbus_message_unref(reply);
/* Now get the XML for the HCRP service record */
message = dbus_message_new_method_call("org.bluez", adapter,
"org.bluez.Adapter",
"GetRemoteServiceRecordAsXML");
dbus_message_iter_init_append(message, &iter);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &bdaddr);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_UINT32, &service_handle);
reply = dbus_connection_send_with_reply_and_block(conn,
message, -1, NULL);
dbus_message_unref(message);
if (!reply)
return NULL;
dbus_message_iter_init(reply, &reply_iter);
dbus_message_iter_get_basic(&reply_iter, &xml);
id = parse_xml_sdp(xml);
dbus_message_unref(reply);
return id;
}
static void add_device_to_list(const char *name, const char *bdaddr, const char *id)
{
struct cups_device *device;
GSList *l;
/* Look for the device in the list */
for (l = device_list; l != NULL; l = l->next) {
device = (struct cups_device *) l->data;
if (strcmp(device->bdaddr, bdaddr) == 0) {
g_free(device->name);
device->name = g_strdup(name);
return;
}
}
/* Or add it to the list if it's not there */
device = g_new0(struct cups_device, 1);
device->bdaddr = g_strdup(bdaddr);
device->name = g_strdup(name);
device->id = g_strdup(id);
device_list = g_slist_prepend(device_list, device);
}
static char *escape_name(const char *str, char orig, char dest)
{
char *ret, *s;
ret = g_strdup(str);
while ((s = strchr(ret, orig)) != NULL)
s[0] = dest;
return ret;
}
static void print_printer_details(const char *name, const char *bdaddr, const char *id)
{
char *uri, *escaped;
guint len;
escaped = escape_name(name, '\"', '\'');
len = strlen("bluetooth://") + 12 + 1;
uri = g_malloc(len);
snprintf(uri, len, "bluetooth://%c%c%c%c%c%c%c%c%c%c%c%c",
bdaddr[0], bdaddr[1],
bdaddr[3], bdaddr[4],
bdaddr[6], bdaddr[7],
bdaddr[9], bdaddr[10],
bdaddr[12], bdaddr[13],
bdaddr[15], bdaddr[16]);
printf("network %s \"Unknown\" \"%s (Bluetooth)\"", uri, escaped);
if (id != NULL)
printf(" \"%s\"\n", id);
else
printf ("\n");
g_free(escaped);
g_free(uri);
}
static gboolean device_is_printer(const char *adapter, const char *bdaddr)
{
char *class;
DBusMessage *message, *reply;
DBusMessageIter iter, reply_iter;
message = dbus_message_new_method_call("org.bluez", adapter,
"org.bluez.Adapter",
"GetRemoteMinorClass");
dbus_message_iter_init_append(message, &iter);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &bdaddr);
reply = dbus_connection_send_with_reply_and_block(conn,
message, -1, NULL);
dbus_message_unref(message);
if (!reply)
return FALSE;
dbus_message_iter_init(reply, &reply_iter);
dbus_message_iter_get_basic(&reply_iter, &class);
if (class != NULL && strcmp(class, PRINTER_SERVICE_CLASS_NAME) == 0) {
dbus_message_unref(reply);
return TRUE;
}
return FALSE;
}
static char *device_get_name(const char *adapter, const char *bdaddr)
{
DBusMessage *message, *reply;
DBusMessageIter iter, reply_iter;
char *name;
message = dbus_message_new_method_call("org.bluez", adapter,
"org.bluez.Adapter",
"GetRemoteName");
dbus_message_iter_init_append(message, &iter);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &bdaddr);
reply = dbus_connection_send_with_reply_and_block(conn,
message, -1, NULL);
dbus_message_unref(message);
if (!reply)
return NULL;
dbus_message_iter_init(reply, &reply_iter);
dbus_message_iter_get_basic(&reply_iter, &name);
name = g_strdup(name);
dbus_message_unref(reply);
return name;
}
static void remote_device_found(const char *adapter, const char *bdaddr, guint class, int rssi)
{
uint8_t major_index = (class >> 8) & 0x1F;
uint8_t minor_index;
uint8_t shift_minor = 0;
gboolean found = FALSE;
char *name, *id;
/* Check if we have a printer
* From hcid/dbus-adapter.c minor_class_str() */
if (major_index != 6)
return;
minor_index = (class >> 4) & 0x0F;
while (shift_minor < 4) {
if (((minor_index >> shift_minor) & 0x01) == 0x01) {
if (shift_minor == 3) {
found = TRUE;
break;
}
}
shift_minor++;
}
if (!found)
return;
name = device_get_name(adapter, bdaddr);
id = device_get_ieee1284_id(adapter, bdaddr);
add_device_to_list(name, bdaddr, id);
g_free(name);
g_free(id);
}
static void remote_name_updated(const char *bdaddr, const char *name)
{
add_device_to_list(name, bdaddr, NULL);
}
static void discovery_completed(void)
{
GSList *l;
for (l = device_list; l != NULL; l = l->next) {
struct cups_device *device = (struct cups_device *) l->data;
if (device->name == NULL)
device->name = escape_name(device->bdaddr, ':', '-');
print_printer_details(device->name, device->bdaddr, device->id);
g_free(device->name);
g_free(device->bdaddr);
g_free(device->id);
g_free(device);
}
g_slist_free(device_list);
device_list = NULL;
g_main_loop_quit(loop);
}
static void remote_device_disappeared(const char *bdaddr)
{
GSList *l;
for (l = device_list; l != NULL; l = l->next) {
struct cups_device *device = (struct cups_device *) l->data;
if (strcmp(device->bdaddr, bdaddr) == 0) {
g_free(device->name);
g_free(device->bdaddr);
g_free(device);
device_list = g_slist_delete_link(device_list, l);
return;
}
}
}
static gboolean list_known_printers(const char *adapter)
{
DBusMessageIter reply_iter, iter_array;
DBusError error;
DBusMessage *message, *reply;
message = dbus_message_new_method_call ("org.bluez", adapter,
"org.bluez.Adapter",
"ListRemoteDevices");
if (message == NULL)
return FALSE;
dbus_error_init(&error);
reply = dbus_connection_send_with_reply_and_block(conn,
message, -1, &error);
dbus_message_unref(message);
if (&error != NULL && dbus_error_is_set(&error))
return FALSE;
dbus_message_iter_init(reply, &reply_iter);
if (dbus_message_iter_get_arg_type(&reply_iter) != DBUS_TYPE_ARRAY) {
dbus_message_unref(reply);
return FALSE;
}
dbus_message_iter_recurse(&reply_iter, &iter_array);
while (dbus_message_iter_get_arg_type(&iter_array) == DBUS_TYPE_STRING) {
char *bdaddr;
dbus_message_iter_get_basic(&iter_array, &bdaddr);
if (device_is_printer(adapter, bdaddr)) {
char *name, *id;
name = device_get_name(adapter, bdaddr);
id = device_get_ieee1284_id(adapter, bdaddr);
add_device_to_list(name, bdaddr, id);
g_free(name);
g_free(id);
}
dbus_message_iter_next(&iter_array);
}
dbus_message_unref(reply);
return FALSE;
}
static DBusHandlerResult filter_func(DBusConnection *connection, DBusMessage *message, void *user_data)
{
const char *adapter;
if (dbus_message_is_signal(message, "org.bluez.Adapter",
"RemoteDeviceFound")) {
char *bdaddr;
guint class;
int rssi;
dbus_message_get_args(message, NULL,
DBUS_TYPE_STRING, &bdaddr,
DBUS_TYPE_UINT32, &class,
DBUS_TYPE_INT32, &rssi,
DBUS_TYPE_INVALID);
adapter = dbus_message_get_path(message);
remote_device_found(adapter, bdaddr, class, rssi);
} else if (dbus_message_is_signal(message, "org.bluez.Adapter",
"RemoteNameUpdated")) {
char *bdaddr, *name;
dbus_message_get_args(message, NULL,
DBUS_TYPE_STRING, &bdaddr,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID);
remote_name_updated(bdaddr, name);
} else if (dbus_message_is_signal(message, "org.bluez.Adapter",
"RemoteDeviceDisappeared")) {
char *bdaddr;
dbus_message_get_args(message, NULL,
DBUS_TYPE_STRING, &bdaddr,
DBUS_TYPE_INVALID);
remote_device_disappeared(bdaddr);
} else if (dbus_message_is_signal(message, "org.bluez.Adapter",
"DiscoveryCompleted")) {
discovery_completed();
}
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
static gboolean list_printers(void)
{
/* 1. Connect to the bus
* 2. Get the manager
* 3. Get the default adapter
* 4. Get a list of devices
* 5. Get the class of each device
* 6. Print the details from each printer device
*/
DBusError error;
dbus_bool_t hcid_exists;
DBusMessage *reply, *message;
DBusMessageIter reply_iter;
char *adapter, *match;
guint len;
conn = g_dbus_setup_bus(DBUS_BUS_SYSTEM, NULL, NULL);
if (conn == NULL)
return FALSE;
dbus_error_init(&error);
hcid_exists = dbus_bus_name_has_owner(conn, "org.bluez", &error);
if (&error != NULL && dbus_error_is_set(&error))
return FALSE;
if (!hcid_exists)
return FALSE;
/* Get the default adapter */
message = dbus_message_new_method_call("org.bluez", "/org/bluez",
"org.bluez.Manager",
"DefaultAdapter");
if (message == NULL) {
dbus_connection_unref(conn);
return FALSE;
}
reply = dbus_connection_send_with_reply_and_block(conn,
message, -1, &error);
dbus_message_unref(message);
if (&error != NULL && dbus_error_is_set(&error)) {
dbus_connection_unref(conn);
return FALSE;
}
dbus_message_iter_init(reply, &reply_iter);
if (dbus_message_iter_get_arg_type(&reply_iter) != DBUS_TYPE_STRING) {
dbus_message_unref(reply);
dbus_connection_unref(conn);
return FALSE;
}
dbus_message_iter_get_basic(&reply_iter, &adapter);
adapter = g_strdup(adapter);
dbus_message_unref(reply);
if (!dbus_connection_add_filter(conn, filter_func, adapter, g_free)) {
g_free(adapter);
dbus_connection_unref(conn);
return FALSE;
}
#define MATCH_FORMAT \
"type='signal'," \
"interface='org.bluez.Adapter'," \
"sender='org.bluez'," \
"path='%s'"
len = strlen(MATCH_FORMAT) - 2 + strlen(adapter) + 1;
match = g_malloc(len);
snprintf(match, len, "type='signal',"
"interface='org.bluez.Adapter',"
"sender='org.bluez',"
"path='%s'",
adapter);
dbus_bus_add_match(conn, match, &error);
g_free(match);
message = dbus_message_new_method_call("org.bluez", adapter,
"org.bluez.Adapter",
"DiscoverDevicesWithoutNameResolving");
if (!dbus_connection_send_with_reply(conn, message, NULL, -1)) {
dbus_message_unref(message);
dbus_connection_unref(conn);
g_free(adapter);
return FALSE;
}
dbus_message_unref(message);
/* Also add the the recent devices */
g_timeout_add(0, (GSourceFunc) list_known_printers, adapter);
loop = g_main_loop_new(NULL, TRUE);
g_main_loop_run(loop);
dbus_connection_unref(conn);
return TRUE;
}
/*
* Usage: printer-uri job-id user title copies options [file]
*
*/
int main(int argc, char *argv[])
{
sdp_session_t *sdp;
bdaddr_t bdaddr;
unsigned short ctrl_psm, data_psm;
uint8_t channel, b[6];
char *ptr, str[3], device[18], service[12];
const char *uri, *cups_class;
int i, err, fd, copies, proto;
/* Make sure status messages are not buffered */
setbuf(stderr, NULL);
/* Ignore SIGPIPE signals */
#ifdef HAVE_SIGSET
sigset(SIGPIPE, SIG_IGN);
#elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
action.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &action, NULL);
#else
signal(SIGPIPE, SIG_IGN);
#endif /* HAVE_SIGSET */
if (argc == 1) {
if (list_printers() == TRUE)
return CUPS_BACKEND_OK;
else
return CUPS_BACKEND_FAILED;
}
if (argc < 6 || argc > 7) {
fprintf(stderr, "Usage: bluetooth job-id user title copies options [file]\n");
return CUPS_BACKEND_FAILED;
}
if (argc == 6) {
fd = 0;
copies = 1;
} else {
if ((fd = open(argv[6], O_RDONLY)) < 0) {
perror("ERROR: Unable to open print file");
return CUPS_BACKEND_FAILED;
}
copies = atoi(argv[4]);
}
uri = getenv("DEVICE_URI");
if (!uri)
uri = argv[0];
if (strncasecmp(uri, "bluetooth://", 12)) {
fprintf(stderr, "ERROR: No device URI found\n");
return CUPS_BACKEND_FAILED;
}
ptr = argv[0] + 12;
for (i = 0; i < 6; i++) {
strncpy(str, ptr, 2);
b[i] = (uint8_t) strtol(str, NULL, 16);
ptr += 2;
}
sprintf(device, "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X",
b[0], b[1], b[2], b[3], b[4], b[5]);
str2ba(device, &bdaddr);
ptr = strchr(ptr, '/');
if (ptr) {
strncpy(service, ptr + 1, 12);
if (!strncasecmp(ptr + 1, "spp", 3))
proto = 1;
else if (!strncasecmp(ptr + 1, "hcrp", 4))
proto = 2;
else
proto = 0;
} else {
strcpy(service, "auto");
proto = 0;
}
cups_class = getenv("CLASS");
fprintf(stderr, "DEBUG: %s device %s service %s fd %d copies %d class %s\n",
argv[0], device, service, fd, copies,
cups_class ? cups_class : "(none)");
fputs("STATE: +connecting-to-device\n", stderr);
service_search:
sdp = sdp_connect(BDADDR_ANY, &bdaddr, SDP_RETRY_IF_BUSY);
if (!sdp) {
fprintf(stderr, "ERROR: Can't open Bluetooth connection\n");
return CUPS_BACKEND_FAILED;
}
switch (proto) {
case 1:
err = sdp_search_spp(sdp, &channel);
break;
case 2:
err = sdp_search_hcrp(sdp, &ctrl_psm, &data_psm);
break;
default:
proto = 2;
err = sdp_search_hcrp(sdp, &ctrl_psm, &data_psm);
if (err) {
proto = 1;
err = sdp_search_spp(sdp, &channel);
}
break;
}
sdp_close(sdp);
if (err) {
if (cups_class) {
fputs("INFO: Unable to contact printer, queuing on "
"next printer in class...\n", stderr);
sleep(5);
return CUPS_BACKEND_FAILED;
}
sleep(20);
fprintf(stderr, "ERROR: Can't get service information\n");
goto service_search;
}
connect:
switch (proto) {
case 1:
err = spp_print(BDADDR_ANY, &bdaddr, channel,
fd, copies, cups_class);
break;
case 2:
err = hcrp_print(BDADDR_ANY, &bdaddr, ctrl_psm, data_psm,
fd, copies, cups_class);
break;
default:
err = CUPS_BACKEND_FAILED;
fprintf(stderr, "ERROR: Unsupported protocol\n");
break;
}
if (err == CUPS_BACKEND_FAILED && cups_class) {
fputs("INFO: Unable to contact printer, queuing on "
"next printer in class...\n", stderr);
sleep(5);
return CUPS_BACKEND_FAILED;
} else if (err == CUPS_BACKEND_RETRY) {
sleep(20);
goto connect;
}
if (fd != 0)
close(fd);
if (!err)
fprintf(stderr, "INFO: Ready to print\n");
return err;
}