Receives the GraphicsDeviceInfo message from the streaming agent and
stores the data in a list on the streaming device.
Signed-off-by: Lukáš Hrázký <lhrazky@xxxxxxxxxx>
---
server/display-limits.h | 3 ++
server/red-qxl.c | 2 +-
server/red-stream-device.c | 78 +++++++++++++++++++++++++++++++++++++-
server/red-stream-device.h | 8 ++++
4 files changed, 88 insertions(+), 3 deletions(-)
diff --git a/server/display-limits.h b/server/display-limits.h
index e875149b..d79d3211 100644
--- a/server/display-limits.h
+++ b/server/display-limits.h
@@ -25,4 +25,7 @@
/** Maximum number of streams created by spice-server */
#define NUM_STREAMS 50
+/** Maximum length of the device address string */
+#define MAX_DEVICE_ADDRESS_LEN 256
+
#endif /* DISPLAY_LIMITS_H_ */
diff --git a/server/red-qxl.c b/server/red-qxl.c
index 7f8ac35d..37f3d9c8 100644
--- a/server/red-qxl.c
+++ b/server/red-qxl.c
@@ -37,11 +37,11 @@
#include "dispatcher.h"
#include "red-parse-qxl.h"
#include "red-channel-client.h"
+#include "display-limits.h"
#include "red-qxl.h"
-#define MAX_DEVICE_ADDRESS_LEN 256
#define MAX_MONITORS_COUNT 16
struct QXLState {
diff --git a/server/red-stream-device.c b/server/red-stream-device.c
index 3b553510..38df8e4c 100644
--- a/server/red-stream-device.c
+++ b/server/red-stream-device.c
@@ -39,6 +39,7 @@ struct StreamDevice {
StreamMsgCapabilities capabilities;
StreamMsgCursorSet cursor_set;
StreamMsgCursorMove cursor_move;
+ StreamMsgDeviceDisplayInfo device_display_info;
uint8_t buf[STREAM_MSG_CAPABILITIES_MAX_BYTES];
} *msg;
uint32_t msg_pos;
@@ -51,6 +52,7 @@ struct StreamDevice {
CursorChannel *cursor_channel;
SpiceTimer *close_timer;
uint32_t frame_mmtime;
+ StreamDeviceDisplayInfo device_display_info;
};
struct StreamDeviceClass {
@@ -66,8 +68,8 @@ static void char_device_set_state(RedCharDevice *char_dev, int state);
typedef bool StreamMsgHandler(StreamDevice *dev, SpiceCharDeviceInstance *sin)
SPICE_GNUC_WARN_UNUSED_RESULT;
-static StreamMsgHandler handle_msg_format, handle_msg_data, handle_msg_cursor_set,
- handle_msg_cursor_move, handle_msg_capabilities;
+static StreamMsgHandler handle_msg_format, handle_msg_device_display_info, handle_msg_data,
+ handle_msg_cursor_set, handle_msg_cursor_move, handle_msg_capabilities;
static bool handle_msg_invalid(StreamDevice *dev, SpiceCharDeviceInstance *sin,
const char *error_msg) SPICE_GNUC_WARN_UNUSED_RESULT;
@@ -150,6 +152,13 @@ stream_device_partial_read(StreamDevice *dev, SpiceCharDeviceInstance *sin)
handled = handle_msg_format(dev, sin);
}
break;
+ case STREAM_TYPE_DEVICE_DISPLAY_INFO:
+ if (dev->hdr.size > sizeof(StreamMsgDeviceDisplayInfo) + MAX_DEVICE_ADDRESS_LEN) {
+ handled = handle_msg_invalid(dev, sin, "StreamMsgDeviceDisplayInfo too large");
+ } else {
+ handled = handle_msg_device_display_info(dev, sin);
+ }
+ break;
case STREAM_TYPE_DATA:
if (dev->hdr.size > 32*1024*1024) {
handled = handle_msg_invalid(dev, sin, "STREAM_DATA too large");
@@ -275,6 +284,71 @@ handle_msg_format(StreamDevice *dev, SpiceCharDeviceInstance *sin)
return true;
}
+static bool
+handle_msg_device_display_info(StreamDevice *dev, SpiceCharDeviceInstance *sin)
+{
+ SpiceCharDeviceInterface *sif = spice_char_device_get_interface(sin);
+
+ if (spice_extra_checks) {
+ spice_assert(dev->hdr_pos >= sizeof(StreamDevHeader));
+ spice_assert(dev->hdr.type == STREAM_TYPE_DEVICE_DISPLAY_INFO);
+ }
+
+ if (dev->msg_len < dev->hdr.size) {
+ dev->msg = g_realloc(dev->msg, dev->hdr.size);
+ dev->msg_len = dev->hdr.size;
+ }
+
+ /* read from device */
+ ssize_t n = sif->read(sin, dev->msg->buf + dev->msg_pos, dev->hdr.size - dev->msg_pos);
+ if (n <= 0) {
+ return dev->msg_pos == dev->hdr.size;
+ }
+
+ dev->msg_pos += n;
+ if (dev->msg_pos != dev->hdr.size) { /* some bytes are still missing */
+ return false;
+ }
+
+ StreamMsgDeviceDisplayInfo *display_info_msg = &dev->msg->device_display_info;
+
+ size_t device_address_len = GUINT32_FROM_LE(display_info_msg->device_address_len);
+ if (device_address_len > MAX_DEVICE_ADDRESS_LEN) {
+ g_warning("Received a device address longer than %u (%zu), "
+ "will be truncated!", MAX_DEVICE_ADDRESS_LEN, device_address_len);
+ device_address_len = sizeof(dev->device_display_info.device_address);
+ }
+
+ if (device_address_len == 0) {
+ g_warning("Zero length device_address in DeviceDisplayInfo message, ignoring.");
+ return true;
+ }
+
+ if (display_info_msg->device_address + device_address_len > (uint8_t*) dev->msg + dev->hdr.size) {
+ g_warning("Malformed DeviceDisplayInfo message, device_address length (%zu) "
+ "goes beyond the end of the message, ignoring.", device_address_len);
+ return true;
+ }
+
+ strncpy(dev->device_display_info.device_address,
+ (char*) display_info_msg->device_address,
+ device_address_len);
+
+ // make sure the string is terminated
+ dev->device_display_info.device_address[device_address_len - 1] = '\0';
+
+ dev->device_display_info.stream_id = GUINT32_FROM_LE(display_info_msg->stream_id);
+ dev->device_display_info.device_display_id = GUINT32_FROM_LE(display_info_msg->device_display_id);
+
+ g_debug("Received DeviceDisplayInfo from the streaming agent: stream_id %u, "
+ "device_address %s, device_display_id %u",
+ dev->device_display_info.stream_id,
+ dev->device_display_info.device_address,
+ dev->device_display_info.device_display_id);
+
+ return true;
+}
+
static bool
handle_msg_capabilities(StreamDevice *dev, SpiceCharDeviceInstance *sin)
{
diff --git a/server/red-stream-device.h b/server/red-stream-device.h
index f0a5b5c1..996be016 100644
--- a/server/red-stream-device.h
+++ b/server/red-stream-device.h
@@ -19,6 +19,7 @@
#ifndef STREAM_DEVICE_H
#define STREAM_DEVICE_H
+#include "display-limits.h"
#include "char-device.h"
G_BEGIN_DECLS
@@ -41,6 +42,13 @@ typedef struct StreamDeviceClass StreamDeviceClass;
(G_TYPE_INSTANCE_GET_CLASS((obj), TYPE_STREAM_DEVICE, StreamDeviceClass))
GType stream_device_get_type(void) G_GNUC_CONST;
+
+typedef struct StreamDeviceDisplayInfo {
+ uint32_t stream_id;
+ char device_address[MAX_DEVICE_ADDRESS_LEN];
+ uint32_t device_display_id;
+} StreamDeviceDisplayInfo;
+
StreamDevice *stream_device_connect(RedsState *reds, SpiceCharDeviceInstance *sin);
/* Create channel for the streaming device.
--
2.20.1
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