[host/client] kvmfr: update to include extra user data about the VM

This change allows the host to provide information to the client about
how the VM is configured, information such as the UUID, CPU
configuration and capture method both for informational display in the
client as well as debugging in the client's logs.

The format of the records allows this to be extended later with new
record types without needing to bump the KVMFR version.

common/include/common/KVMFR.h

@@ -28,7 +28,7 @@
 #include "types.h"
 
 #define KVMFR_MAGIC   "KVMFR---"
-#define KVMFR_VERSION 14
+#define KVMFR_VERSION 15
 
 #define KVMFR_MAX_DAMAGE_RECTS 64
 
@@ -67,9 +67,50 @@ typedef struct KVMFR
   uint32_t          version;
   char              hostver[32];
   KVMFRFeatureFlags features;
+  //KVMFRRecords start here if there are any
 }
 KVMFR;
 
+typedef struct KVMFRRecord
+{
+  uint8_t  type;
+  uint32_t size;
+  uint8_t  data[];
+}
+KVMFRRecord;
+
+enum
+{
+  KVMFR_RECORD_VMINFO = 1,
+  KVMFR_RECORD_OSINFO
+};
+
+enum
+{
+  KVMFR_OS_LINUX,
+  KVMFR_OS_BSD,
+  KVMFR_OS_OSX,
+  KVMFR_OS_WINDOWS,
+  KVMFR_OS_OTHER
+};
+
+typedef struct KVMFRRecord_VMInfo
+{
+  uint8_t uuid   [16]; // the guest's UUID
+  char    capture[32]; // the capture device in use
+  uint8_t cpus;        // number of CPUs
+  uint8_t cores;       // number of CPU cores
+  char    model[];
+}
+KVMFRRecord_VMInfo;
+
+typedef struct KVMFRRecord_OSInfo
+{
+  uint8_t os;     // KVMFR_OS_*
+  char    name[]; // friendly name
+}
+KVMFRRecord_OSInfo;
+
 typedef struct KVMFRCursor
 {
   int16_t    x, y;        // cursor x & y position