[Spice-devel] [PATCH] vdagent: support announce_capabilities

[Alon Levy]

---
 vdagent/vdagent.cpp |   52 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 51 insertions(+), 1 deletions(-)

diff --git a/vdagent/vdagent.cpp b/vdagent/vdagent.cpp
index b1f47c0..8cba032 100644
--- a/vdagent/vdagent.cpp
+++ b/vdagent/vdagent.cpp
@@ -37,6 +37,8 @@ private:
     VDAgent();
     void input_desktop_message_loop();
     bool handle_mouse_event(VDAgentMouseState* state);
+    bool handle_announce_capabilities(
+        VDAgentAnnounceCapabilities* announce_capabilities, uint32_t port);
     bool handle_mon_config(VDAgentMonitorsConfig* mon_config, uint32_t port);
     bool handle_clipboard(VDAgentClipboard* clipboard, uint32_t size);
     bool handle_display_config(VDAgentDisplayConfig* display_config, uint32_t port);
@@ -522,6 +524,48 @@ void VDAgent::load_display_setting()
     _display_setting.load();
 }
 
+bool VDAgent::handle_announce_capabilities(
+    VDAgentAnnounceCapabilities* announce_capabilities, uint32_t port)
+{
+    DWORD msg_size;
+    VDPipeMessage* caps_pipe_msg;
+    VDAgentMessage* caps_msg;
+    VDAgentAnnounceCapabilities* caps;
+
+    /** Disable/enable any features that are not compatible with client capabilities.
+     */
+    vd_printf("got capabilities %X%X%X%X%X%X%X%X", announce_capabilities->caps[0],
+        announce_capabilities->caps[1], announce_capabilities->caps[2],
+        announce_capabilities->caps[3], announce_capabilities->caps[4],
+        announce_capabilities->caps[5], announce_capabilities->caps[6],
+        announce_capabilities->caps[7]);
+
+    /** announce our own capabilities.
+     */
+    msg_size = VD_MESSAGE_HEADER_SIZE + sizeof(VDAgentAnnounceCapabilities);
+    caps_pipe_msg = (VDPipeMessage*)write_lock(msg_size);
+    if (!caps_pipe_msg) {
+        return false;
+    }
+
+    caps_pipe_msg->type = VD_AGENT_COMMAND;
+    caps_pipe_msg->opaque = port;
+    caps_pipe_msg->size = sizeof(VDAgentMessage) + sizeof(VDAgentAnnounceCapabilities);
+    caps_msg = (VDAgentMessage*)caps_pipe_msg->data;
+    caps_msg->protocol = VD_AGENT_PROTOCOL;
+    caps_msg->type = VD_AGENT_ANNOUNCE_CAPABILITIES;
+    caps_msg->opaque = 0;
+    caps_msg->size = sizeof(VDAgentReply);
+    caps = (VDAgentAnnounceCapabilities*)caps_msg->data;
+    memset(caps->caps, 0, sizeof(caps->caps));
+    VD_AGENT_SET_CAPABILITY(caps->caps, VD_AGENT_CAP_DISPLAY_CONFIG);
+    write_unlock(msg_size);
+    if (!_pending_write) {
+        write_completion(0, 0, &_pipe_state.write.overlap);
+    }
+    return true;
+}
+
 bool VDAgent::handle_display_config(VDAgentDisplayConfig* display_config, uint32_t port)
 {
     DisplaySettingOptions disp_setting_opts;
@@ -740,7 +784,13 @@ void VDAgent::dispatch_message(VDAgentMessage* msg, uint32_t port)
         if (!a->handle_display_config((VDAgentDisplayConfig*)msg->data, port)) {
             vd_printf("handle_display_config failed");
             a->_running = false;
-        }        
+        }
+        break;
+    case VD_AGENT_ANNOUNCE_CAPABILITIES:
+        if (!a->handle_announce_capabilities((VDAgentAnnounceCapabilities*)msg->data, port)) {
+            vd_printf("handle_announce_capabilities failed");
+            a->_running = false;
+        }
         break;
     default:
         vd_printf("Unsupported message type %u size %u", msg->type, msg->size);
-- 
1.7.2