[PATCH 2/3] Handle VDAgentDisplayConfig message in vdagentd, send it to active vdagent

[Fedor Lyakhov <fedor.lyakhov@xxxxxxxxx>]

---
 src/vdagentd-proto-strings.h |  1 +
 src/vdagentd-proto.h         |  3 ++-
 src/vdagentd.c               | 38 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/src/vdagentd-proto-strings.h b/src/vdagentd-proto-strings.h
index e76cb3b..7ea7195 100644
--- a/src/vdagentd-proto-strings.h
+++ b/src/vdagentd-proto-strings.h
@@ -34,6 +34,7 @@ static const char * const vdagentd_messages[] = {
         "file xfer status",
         "file xfer data",
         "client disconnected",
+        "display config"
 };

 #endif
diff --git a/src/vdagentd-proto.h b/src/vdagentd-proto.h
index 25e6a36..6a09e49 100644
--- a/src/vdagentd-proto.h
+++ b/src/vdagentd-proto.h
@@ -39,7 +39,8 @@ enum {
     VDAGENTD_FILE_XFER_START,
     VDAGENTD_FILE_XFER_STATUS,
     VDAGENTD_FILE_XFER_DATA,
-    VDAGENTD_CLIENT_DISCONNECTED,  /* daemon -> client */
+    VDAGENTD_CLIENT_DISCONNECTED,  /* daemon -> client */
+    VDAGENTD_DISPLAY_CONFIG, /* daemon -> client, VDAgentDisplayConfig */
     VDAGENTD_NO_MESSAGES /* Must always be last */
 };

diff --git a/src/vdagentd.c b/src/vdagentd.c
index f4cea44..c9df401 100644
--- a/src/vdagentd.c
+++ b/src/vdagentd.c
@@ -91,6 +91,7 @@ static void send_capabilities(struct
vdagent_virtio_port *vport,
     caps->request = request;
     VD_AGENT_SET_CAPABILITY(caps->caps, VD_AGENT_CAP_MOUSE_STATE);
     VD_AGENT_SET_CAPABILITY(caps->caps, VD_AGENT_CAP_MONITORS_CONFIG);
+    VD_AGENT_SET_CAPABILITY(caps->caps, VD_AGENT_CAP_DISPLAY_CONFIG);
     VD_AGENT_SET_CAPABILITY(caps->caps, VD_AGENT_CAP_REPLY);
     VD_AGENT_SET_CAPABILITY(caps->caps, VD_AGENT_CAP_CLIPBOARD_BY_DEMAND);
     VD_AGENT_SET_CAPABILITY(caps->caps, VD_AGENT_CAP_CLIPBOARD_SELECTION);
@@ -151,6 +152,38 @@ static void do_client_monitors(struct
vdagent_virtio_port *vport, int port_nr,
                               (uint8_t *)&reply, sizeof(reply));
 }

+static void do_client_display(struct vdagent_virtio_port *vport, int port_nr,
+    VDAgentMessage *message_header, VDAgentDisplayConfig *disp)
+{
+    VDAgentReply reply;
+    VDAgentDisplayConfig *display_config;
+    uint32_t size;
+
+    size = sizeof(VDAgentDisplayConfig);
+    if (message_header->size != size) {
+        syslog(LOG_ERR, "invalid message size for VDAgentDisplayConfig");
+        return;
+    }
+
+    display_config = malloc(size);
+    if (!display_config) {
+        syslog(LOG_ERR, "oom allocating display config");
+        size = 0;
+    }
+    memcpy(display_config, disp, size);
+
+    /* Send display config to currently active agent */
+    if (active_session_conn)
+        udscs_write(active_session_conn, VDAGENTD_DISPLAY_CONFIG, 0, 0,
+                    (uint8_t *)display_config, size);
+
+    /* Acknowledge reception of display config to spice server / client */
+    reply.type  = VD_AGENT_DISPLAY_CONFIG;
+    reply.error = VD_AGENT_SUCCESS;
+    vdagent_virtio_port_write(vport, port_nr, VD_AGENT_REPLY, 0,
+                              (uint8_t *)&reply, sizeof(reply));
+}
+
 static void do_client_capabilities(struct vdagent_virtio_port *vport,
     VDAgentMessage *message_header,
     VDAgentAnnounceCapabilities *caps)
@@ -330,6 +363,11 @@ int virtio_port_read_complete(
         do_client_monitors(vport, port_nr, message_header,
                     (VDAgentMonitorsConfig *)data);
         break;
+    case VD_AGENT_DISPLAY_CONFIG:
+        if (message_header->size < sizeof(VDAgentDisplayConfig))
+            goto size_error;
+        do_client_display(vport, port_nr, message_header,
+                    (VDAgentDisplayConfig *)data);
     case VD_AGENT_ANNOUNCE_CAPABILITIES:
         if (message_header->size < sizeof(VDAgentAnnounceCapabilities))
             goto size_error;
-- 
1.8.1.4
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