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ui/dbus: win32 support

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D-Bus doesn't support fd-passing on Windows (AF_UNIX doesn't have
SCM_RIGHTS yet, but there are other means to share objects. I have
proposed various solutions upstream, but none seem fitting enough atm).

To make the "-display dbus" work on Windows, implement an alternative
D-Bus interface where all the 'h' (FDs) arguments are replaced with
'ay' (WSASocketW data), and sockets are passed to the other end via
WSADuplicateSocket().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230606115658.677673-6-marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau 2023-06-06 15:56:42 +04:00
parent 9b286e76c8
commit 6cc5a6159a
7 changed files with 149 additions and 23 deletions
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44
audio/dbusaudio.c
View file

@ -33,6 +33,7 @@
#include <gio/gunixfdlist.h>
#endif
#include "ui/dbus.h"
#include "ui/dbus-display1.h"
#define AUDIO_CAP "dbus"
@ -422,7 +423,6 @@ dbus_audio_fini(void *opaque)
g_free(da);
}
#ifdef G_OS_UNIX
static void
listener_out_vanished_cb(GDBusConnection *connection,
gboolean remote_peer_vanished,
@ -448,7 +448,9 @@ listener_in_vanished_cb(GDBusConnection *connection,
static gboolean
dbus_audio_register_listener(AudioState *s,
GDBusMethodInvocation *invocation,
#ifdef G_OS_UNIX
GUnixFDList *fd_list,
#endif
GVariant *arg_listener,
bool out)
{
@ -475,6 +477,11 @@ dbus_audio_register_listener(AudioState *s,
return DBUS_METHOD_INVOCATION_HANDLED;
}
#ifdef G_OS_WIN32
if (!dbus_win32_import_socket(invocation, arg_listener, &fd)) {
return DBUS_METHOD_INVOCATION_HANDLED;
}
#else
fd = g_unix_fd_list_get(fd_list, g_variant_get_handle(arg_listener), &err);
if (err) {
g_dbus_method_invocation_return_error(invocation,
@ -484,6 +491,7 @@ dbus_audio_register_listener(AudioState *s,
err->message);
return DBUS_METHOD_INVOCATION_HANDLED;
}
#endif
socket = g_socket_new_from_fd(fd, &err);
if (err) {
@ -492,15 +500,28 @@ dbus_audio_register_listener(AudioState *s,
DBUS_DISPLAY_ERROR_FAILED,
"Couldn't make a socket: %s",
err->message);
#ifdef G_OS_WIN32
closesocket(fd);
#else
close(fd);
#endif
return DBUS_METHOD_INVOCATION_HANDLED;
}
socket_conn = g_socket_connection_factory_create_connection(socket);
if (out) {
qemu_dbus_display1_audio_complete_register_out_listener(
da->iface, invocation, NULL);
da->iface, invocation
#ifdef G_OS_UNIX
, NULL
#endif
);
} else {
qemu_dbus_display1_audio_complete_register_in_listener(
da->iface, invocation, NULL);
da->iface, invocation
#ifdef G_OS_UNIX
, NULL
#endif
);
}
listener_conn =
@ -578,24 +599,33 @@ dbus_audio_register_listener(AudioState *s,
static gboolean
dbus_audio_register_out_listener(AudioState *s,
GDBusMethodInvocation *invocation,
#ifdef G_OS_UNIX
GUnixFDList *fd_list,
#endif
GVariant *arg_listener)
{
return dbus_audio_register_listener(s, invocation,
fd_list, arg_listener, true);
#ifdef G_OS_UNIX
fd_list,
#endif
arg_listener, true);
}
static gboolean
dbus_audio_register_in_listener(AudioState *s,
GDBusMethodInvocation *invocation,
#ifdef G_OS_UNIX
GUnixFDList *fd_list,
#endif
GVariant *arg_listener)
{
return dbus_audio_register_listener(s, invocation,
fd_list, arg_listener, false);
}
#ifdef G_OS_UNIX
fd_list,
#endif
arg_listener, false);
}
static void
dbus_audio_set_server(AudioState *s, GDBusObjectManagerServer *server, bool p2p)
@ -610,14 +640,12 @@ dbus_audio_set_server(AudioState *s, GDBusObjectManagerServer *server, bool p2p)
da->audio = g_dbus_object_skeleton_new(DBUS_DISPLAY1_AUDIO_PATH);
da->iface = qemu_dbus_display1_audio_skeleton_new();
#ifdef G_OS_UNIX
g_object_connect(da->iface,
"swapped-signal::handle-register-in-listener",
dbus_audio_register_in_listener, s,
"swapped-signal::handle-register-out-listener",
dbus_audio_register_out_listener, s,
NULL);
#endif
g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(da->audio),
G_DBUS_INTERFACE_SKELETON(da->iface));