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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=2:tabstop=2:
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsDBusRemoteServer.h"
#include "nsCOMPtr.h"
#include "mozilla/XREAppData.h"
#include "mozilla/Base64.h"
#include "mozilla/ScopeExit.h"
#include "nsPrintfCString.h"
#include "nsGTKToolkit.h"
#include <dbus/dbus.h>
#include <dbus/dbus-glib-lowlevel.h>
#include <dlfcn.h>
static const char* introspect_template =
"<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection "
"1.0//EN\"\n"
"\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
"<node>\n"
" <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
" <method name=\"Introspect\">\n"
" <arg name=\"data\" direction=\"out\" type=\"s\"/>\n"
" </method>\n"
" </interface>\n"
" <interface name=\"org.mozilla.%s\">\n"
" <method name=\"OpenURL\">\n"
" <arg name=\"url\" direction=\"in\" type=\"ay\"/>\n"
" </method>\n"
" </interface>\n"
"</node>\n";
DBusHandlerResult nsDBusRemoteServer::Introspect(DBusMessage* msg) {
DBusMessage* reply = dbus_message_new_method_return(msg);
if (!reply) return DBUS_HANDLER_RESULT_NEED_MEMORY;
nsAutoCString introspect_xml;
introspect_xml = nsPrintfCString(introspect_template, mAppName.get());
const char* message = introspect_xml.get();
dbus_message_append_args(reply, DBUS_TYPE_STRING, &message,
DBUS_TYPE_INVALID);
dbus_connection_send(mConnection, reply, nullptr);
dbus_message_unref(reply);
return DBUS_HANDLER_RESULT_HANDLED;
}
DBusHandlerResult nsDBusRemoteServer::OpenURL(DBusMessage* msg) {
DBusMessage* reply = nullptr;
const char* commandLine;
int length;
if (!dbus_message_get_args(msg, nullptr, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
&commandLine, &length, DBUS_TYPE_INVALID) ||
length == 0) {
nsAutoCString errorMsg;
errorMsg = nsPrintfCString("org.mozilla.%s.Error", mAppName.get());
reply = dbus_message_new_error(msg, errorMsg.get(), "Wrong argument");
} else {
guint32 timestamp = gtk_get_current_event_time();
if (timestamp == GDK_CURRENT_TIME) {
timestamp = guint32(g_get_monotonic_time() / 1000);
}
HandleCommandLine(commandLine, timestamp);
reply = dbus_message_new_method_return(msg);
}
dbus_connection_send(mConnection, reply, nullptr);
dbus_message_unref(reply);
return DBUS_HANDLER_RESULT_HANDLED;
}
DBusHandlerResult nsDBusRemoteServer::HandleDBusMessage(
DBusConnection* aConnection, DBusMessage* msg) {
NS_ASSERTION(mConnection == aConnection, "Wrong D-Bus connection.");
const char* method = dbus_message_get_member(msg);
const char* iface = dbus_message_get_interface(msg);
if ((strcmp("Introspect", method) == 0) &&
(strcmp("org.freedesktop.DBus.Introspectable", iface) == 0)) {
return Introspect(msg);
}
nsAutoCString ourInterfaceName;
ourInterfaceName = nsPrintfCString("org.mozilla.%s", mAppName.get());
if ((strcmp("OpenURL", method) == 0) &&
(strcmp(ourInterfaceName.get(), iface) == 0)) {
return OpenURL(msg);
}
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
void nsDBusRemoteServer::UnregisterDBusInterface(DBusConnection* aConnection) {
NS_ASSERTION(mConnection == aConnection, "Wrong D-Bus connection.");
// Not implemented
}
static DBusHandlerResult message_handler(DBusConnection* conn, DBusMessage* msg,
void* user_data) {
auto interface = static_cast<nsDBusRemoteServer*>(user_data);
return interface->HandleDBusMessage(conn, msg);
}
static void unregister(DBusConnection* conn, void* user_data) {
auto interface = static_cast<nsDBusRemoteServer*>(user_data);
interface->UnregisterDBusInterface(conn);
}
static DBusObjectPathVTable remoteHandlersTable = {
.unregister_function = unregister,
.message_function = message_handler,
};
nsresult nsDBusRemoteServer::Startup(const char* aAppName,
const char* aProfileName) {
if (mConnection && dbus_connection_get_is_connected(mConnection)) {
// We're already connected so we don't need to reconnect
return NS_ERROR_ALREADY_INITIALIZED;
}
// Don't even try to start without any application/profile name
if (!aAppName || aAppName[0] == '\0' || !aProfileName ||
aProfileName[0] == '\0')
return NS_ERROR_INVALID_ARG;
mConnection = dont_AddRef(dbus_bus_get(DBUS_BUS_SESSION, nullptr));
if (!mConnection) {
return NS_ERROR_FAILURE;
}
auto releaseDBusConnection =
mozilla::MakeScopeExit([&] { mConnection = nullptr; });
dbus_connection_set_exit_on_disconnect(mConnection, false);
dbus_connection_setup_with_g_main(mConnection, nullptr);
mAppName = aAppName;
mozilla::XREAppData::SanitizeNameForDBus(mAppName);
nsAutoCString profileName;
MOZ_TRY(
mozilla::Base64Encode(aProfileName, strlen(aProfileName), profileName));
mozilla::XREAppData::SanitizeNameForDBus(profileName);
nsPrintfCString busName("org.mozilla.%s.%s", mAppName.get(),
profileName.get());
if (busName.Length() > DBUS_MAXIMUM_NAME_LENGTH)
busName.Truncate(DBUS_MAXIMUM_NAME_LENGTH);
static auto sDBusValidateBusName = (bool (*)(const char*, DBusError*))dlsym(
RTLD_DEFAULT, "dbus_validate_bus_name");
if (!sDBusValidateBusName) {
return NS_ERROR_FAILURE;
}
// We don't have a valid busName yet - try to create a default one.
if (!sDBusValidateBusName(busName.get(), nullptr)) {
busName = nsPrintfCString("org.mozilla.%s.%s", mAppName.get(), "default");
if (!sDBusValidateBusName(busName.get(), nullptr)) {
// We failed completelly to get a valid bus name - just quit
// to prevent crash at dbus_bus_request_name().
return NS_ERROR_FAILURE;
}
}
DBusError err;
dbus_error_init(&err);
dbus_bus_request_name(mConnection, busName.get(), DBUS_NAME_FLAG_DO_NOT_QUEUE,
&err);
// The interface is already owned - there is another application/profile
// instance already running.
if (dbus_error_is_set(&err)) {
dbus_error_free(&err);
return NS_ERROR_FAILURE;
}
mPathName = nsPrintfCString("/org/mozilla/%s/Remote", mAppName.get());
static auto sDBusValidatePathName = (bool (*)(const char*, DBusError*))dlsym(
RTLD_DEFAULT, "dbus_validate_path");
if (!sDBusValidatePathName ||
!sDBusValidatePathName(mPathName.get(), nullptr)) {
return NS_ERROR_FAILURE;
}
if (!dbus_connection_register_object_path(mConnection, mPathName.get(),
&remoteHandlersTable, this)) {
return NS_ERROR_FAILURE;
}
releaseDBusConnection.release();
return NS_OK;
}
void nsDBusRemoteServer::Shutdown() {
if (!mConnection) {
return;
}
dbus_connection_unregister_object_path(mConnection, mPathName.get());
// dbus_connection_unref() will be called by RefPtr here.
mConnection = nullptr;
}
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