server: add support for SPICE_COMMON_CAP_MINI_HEADER

Support for a header without a serial and without sub list.
red_channel: Support the two types of headers.
             Keep a consistent consecutive messages serial.
red_worker: use urgent marshaller instead of sub list.
snd_worker: Sound channels need special support since they still don't use
            red_channel for sending & receiving.

4 files changed, 378 insertions, 127 deletions

diff --git a/server/red_channel.c b/server/red_channel.c
index 06b4ef0..e526179 100644
--- a/server/red_channel.c
+++ b/server/red_channel.c
@@ -40,6 +40,82 @@ static void red_client_add_channel(RedClient *client, RedChannelClient *rcc);
 static void red_client_remove_channel(RedChannelClient *rcc);
 static void red_channel_client_restore_main_sender(RedChannelClient *rcc);
 
+static uint32_t full_header_get_msg_size(SpiceDataHeaderOpaque *header)
+{
+    return ((SpiceDataHeader *)header->data)->size;
+}
+
+static uint32_t mini_header_get_msg_size(SpiceDataHeaderOpaque *header)
+{
+    return ((SpiceMiniDataHeader *)header->data)->size;
+}
+
+static uint16_t full_header_get_msg_type(SpiceDataHeaderOpaque *header)
+{
+    return ((SpiceDataHeader *)header->data)->type;
+}
+
+static uint16_t mini_header_get_msg_type(SpiceDataHeaderOpaque *header)
+{
+    return ((SpiceMiniDataHeader *)header->data)->type;
+}
+
+static void full_header_set_msg_type(SpiceDataHeaderOpaque *header, uint16_t type)
+{
+    ((SpiceDataHeader *)header->data)->type = type;
+}
+
+static void mini_header_set_msg_type(SpiceDataHeaderOpaque *header, uint16_t type)
+{
+    ((SpiceMiniDataHeader *)header->data)->type = type;
+}
+
+static void full_header_set_msg_size(SpiceDataHeaderOpaque *header, uint32_t size)
+{
+    ((SpiceDataHeader *)header->data)->size = size;
+}
+
+static void mini_header_set_msg_size(SpiceDataHeaderOpaque *header, uint32_t size)
+{
+    ((SpiceMiniDataHeader *)header->data)->size = size;
+}
+
+static void full_header_set_msg_serial(SpiceDataHeaderOpaque *header, uint64_t serial)
+{
+    ((SpiceDataHeader *)header->data)->serial = serial;
+}
+
+static void mini_header_set_msg_serial(SpiceDataHeaderOpaque *header, uint64_t serial)
+{
+    red_error("attempt to set header serial on mini header");
+}
+
+static void full_header_set_msg_sub_list(SpiceDataHeaderOpaque *header, uint32_t sub_list)
+{
+    ((SpiceDataHeader *)header->data)->sub_list = sub_list;
+}
+
+static void mini_header_set_msg_sub_list(SpiceDataHeaderOpaque *header, uint32_t sub_list)
+{
+    red_error("attempt to set header sub list on mini header");
+}
+
+static SpiceDataHeaderOpaque full_header_wrapper = {NULL, sizeof(SpiceDataHeader),
+                                                    full_header_set_msg_type,
+                                                    full_header_set_msg_size,
+                                                    full_header_set_msg_serial,
+                                                    full_header_set_msg_sub_list,
+                                                    full_header_get_msg_type,
+                                                    full_header_get_msg_size};
+
+static SpiceDataHeaderOpaque mini_header_wrapper = {NULL, sizeof(SpiceMiniDataHeader),
+                                                    mini_header_set_msg_type,
+                                                    mini_header_set_msg_size,
+                                                    mini_header_set_msg_serial,
+                                                    mini_header_set_msg_sub_list,
+                                                    mini_header_get_msg_type,
+                                                    mini_header_get_msg_size};
+
 /* return the number of bytes read. -1 in case of error */
 static int red_peer_receive(RedsStream *stream, uint8_t *buf, uint32_t size)
 {
@@ -83,29 +159,31 @@ static void red_peer_handle_incoming(RedsStream *stream, IncomingHandler *handle
     uint8_t *parsed;
     size_t parsed_size;
     message_destructor_t parsed_free;
+    uint16_t msg_type;
+    uint32_t msg_size;
 
     for (;;) {
         int ret_handle;
-        if (handler->header_pos < sizeof(SpiceDataHeader)) {
+        if (handler->header_pos < handler->header.header_size) {
             bytes_read = red_peer_receive(stream,
-                                          ((uint8_t *)&handler->header) + handler->header_pos,
-                                          sizeof(SpiceDataHeader) - handler->header_pos);
+                                          handler->header.data + handler->header_pos,
+                                          handler->header.header_size - handler->header_pos);
             if (bytes_read == -1) {
                 handler->cb->on_error(handler->opaque);
                 return;
             }
             handler->header_pos += bytes_read;
 
-            if (handler->header_pos != sizeof(SpiceDataHeader)) {
+            if (handler->header_pos != handler->header.header_size) {
                 return;
             }
         }
 
-        if (handler->msg_pos < handler->header.size) {
+        msg_size = handler->header.get_msg_size(&handler->header);
+        msg_type = handler->header.get_msg_type(&handler->header);
+        if (handler->msg_pos < msg_size) {
             if (!handler->msg) {
-                handler->msg = handler->cb->alloc_msg_buf(handler->opaque,
-                                                          handler->header.type,
-                                                          handler->header.size);
+                handler->msg = handler->cb->alloc_msg_buf(handler->opaque, msg_type, msg_size);
                 if (handler->msg == NULL) {
                     red_printf("ERROR: channel refused to allocate buffer.");
                     handler->cb->on_error(handler->opaque);
@@ -115,47 +193,37 @@ static void red_peer_handle_incoming(RedsStream *stream, IncomingHandler *handle
 
             bytes_read = red_peer_receive(stream,
                                           handler->msg + handler->msg_pos,
-                                          handler->header.size - handler->msg_pos);
+                                          msg_size - handler->msg_pos);
             if (bytes_read == -1) {
-                handler->cb->release_msg_buf(handler->opaque,
-                                             handler->header.type,
-                                             handler->header.size,
-                                             handler->msg);
+                handler->cb->release_msg_buf(handler->opaque, msg_type, msg_size, handler->msg);
                 handler->cb->on_error(handler->opaque);
                 return;
             }
             handler->msg_pos += bytes_read;
-            if (handler->msg_pos != handler->header.size) {
+            if (handler->msg_pos != msg_size) {
                 return;
             }
         }
 
         if (handler->cb->parser) {
             parsed = handler->cb->parser(handler->msg,
-                handler->msg + handler->header.size, handler->header.type,
+                handler->msg + msg_size, msg_type,
                 SPICE_VERSION_MINOR, &parsed_size, &parsed_free);
             if (parsed == NULL) {
-                red_printf("failed to parse message type %d", handler->header.type);
-                handler->cb->release_msg_buf(handler->opaque, handler->header.type,
-                                             handler->header.size,
-                                             handler->msg);
+                red_printf("failed to parse message type %d", msg_type);
+                handler->cb->release_msg_buf(handler->opaque, msg_type, msg_size, handler->msg);
                 handler->cb->on_error(handler->opaque);
                 return;
             }
             ret_handle = handler->cb->handle_parsed(handler->opaque, parsed_size,
-                                    handler->header.type, parsed);
+                                                    msg_type, parsed);
             parsed_free(parsed);
         } else {
-            ret_handle = handler->cb->handle_message(handler->opaque,
-                                                     handler->header.type,
-                                                     handler->header.size,
+            ret_handle = handler->cb->handle_message(handler->opaque, msg_type, msg_size,
                                                      handler->msg);
         }
         handler->msg_pos = 0;
-        handler->cb->release_msg_buf(handler->opaque,
-                                     handler->header.type,
-                                     handler->header.size,
-                                     handler->msg);
+        handler->cb->release_msg_buf(handler->opaque, msg_type, msg_size, handler->msg);
         handler->msg = NULL;
         handler->header_pos = 0;
 
@@ -276,21 +344,32 @@ static inline int red_channel_client_urgent_marshaller_is_active(RedChannelClien
 static void red_channel_client_reset_send_data(RedChannelClient *rcc)
 {
     spice_marshaller_reset(rcc->send_data.marshaller);
-    rcc->send_data.header = (SpiceDataHeader *)
-        spice_marshaller_reserve_space(rcc->send_data.marshaller, sizeof(SpiceDataHeader));
-    spice_marshaller_set_base(rcc->send_data.marshaller, sizeof(SpiceDataHeader));
-    rcc->send_data.header->type = 0;
-    rcc->send_data.header->size = 0;
-    rcc->send_data.header->sub_list = 0;
-
-    if (!red_channel_client_urgent_marshaller_is_active(rcc)) {
-        rcc->send_data.header->serial = ++rcc->send_data.serial;
-    } else {
-        /*  The serial was incremented by the call to reset_send_data
-         *  that was done for the main marshaller. The urgent msg should
-         *  receive this serial, and the main msg serial should be
-         *  the following one. */
-        rcc->send_data.header->serial = rcc->send_data.serial++;
+    rcc->send_data.header.data = spice_marshaller_reserve_space(rcc->send_data.marshaller,
+                                                                rcc->send_data.header.header_size);
+    spice_marshaller_set_base(rcc->send_data.marshaller, rcc->send_data.header.header_size);
+    rcc->send_data.header.set_msg_type(&rcc->send_data.header, 0);
+    rcc->send_data.header.set_msg_size(&rcc->send_data.header, 0);
+
+    /* Keeping the serial consecutive: reseting it if reset_send_data
+     * has been called before, but no message has been sent since then.
+     */
+    if (rcc->send_data.last_sent_serial != rcc->send_data.serial) {
+        ASSERT(rcc->send_data.serial - rcc->send_data.last_sent_serial == 1);
+        /*  When the urgent marshaller is active, the serial was incremented by
+         *  the call to reset_send_data that was made for the main marshaller.
+         *  The urgent msg receives this serial, and the main msg serial is
+         *  the following one. Thus, (rcc->send_data.serial - rcc->send_data.last_sent_serial)
+         *  should be 1 in this case*/
+        if (!red_channel_client_urgent_marshaller_is_active(rcc)) {
+            rcc->send_data.serial = rcc->send_data.last_sent_serial;
+        }
+    }
+    rcc->send_data.serial++;
+
+    if (!rcc->is_mini_header) {
+        ASSERT(rcc->send_data.marshaller != rcc->send_data.urgent.marshaller);
+        rcc->send_data.header.set_msg_sub_list(&rcc->send_data.header, 0);
+        rcc->send_data.header.set_msg_serial(&rcc->send_data.header, rcc->send_data.serial);
     }
 }
 
@@ -376,7 +455,7 @@ static void red_channel_peer_on_out_msg_done(void *opaque)
 
     if (red_channel_client_urgent_marshaller_is_active(rcc)) {
         red_channel_client_restore_main_sender(rcc);
-        ASSERT(rcc->send_data.header != NULL);
+        ASSERT(rcc->send_data.header.data != NULL);
         red_channel_client_begin_send_message(rcc);
     }
 }
@@ -457,6 +536,18 @@ RedChannelClient *red_channel_client_create(int size, RedChannel *channel, RedCl
     rcc->outgoing.size = 0;
 
     red_channel_client_set_remote_caps(rcc, num_common_caps, common_caps, num_caps, caps);
+    if (red_channel_client_test_remote_common_cap(rcc, SPICE_COMMON_CAP_MINI_HEADER)) {
+        rcc->incoming.header = mini_header_wrapper;
+        rcc->send_data.header = mini_header_wrapper;
+        rcc->is_mini_header = TRUE;
+    } else {
+        rcc->incoming.header = full_header_wrapper;
+        rcc->send_data.header = full_header_wrapper;
+        rcc->is_mini_header = FALSE;
+    }
+
+    rcc->incoming.header.data = rcc->incoming.header_buf;
+    rcc->incoming.serial = 1;
 
     if (!channel->channel_cbs.config_socket(rcc)) {
         goto error;
@@ -545,6 +636,7 @@ RedChannel *red_channel_create(int size,
     client_cbs.migrate = red_channel_client_default_migrate;
 
     red_channel_register_client_cbs(channel, &client_cbs);
+    red_channel_set_common_cap(channel, SPICE_COMMON_CAP_MINI_HEADER);
 
     channel->thread_id = pthread_self();
 
@@ -590,6 +682,7 @@ RedChannel *red_channel_create_dummy(int size, uint32_t type, uint32_t id)
     client_cbs.migrate = red_channel_client_default_migrate;
 
     red_channel_register_client_cbs(channel, &client_cbs);
+    red_channel_set_common_cap(channel, SPICE_COMMON_CAP_MINI_HEADER);
 
     channel->thread_id = pthread_self();
 
@@ -850,7 +943,7 @@ static void red_channel_handle_migrate_data(RedChannelClient *rcc, uint32_t size
 }
 
 int red_channel_client_handle_message(RedChannelClient *rcc, uint32_t size,
-                               uint16_t type, void *message)
+                                      uint16_t type, void *message)
 {
     switch (type) {
     case SPICE_MSGC_ACK_SYNC:
@@ -897,7 +990,7 @@ void red_channel_client_init_send_data(RedChannelClient *rcc, uint16_t msg_type,
 {
     ASSERT(red_channel_client_no_item_being_sent(rcc));
     ASSERT(msg_type != 0);
-    rcc->send_data.header->type = msg_type;
+    rcc->send_data.header.set_msg_type(&rcc->send_data.header, msg_type);
     rcc->send_data.item = item;
     if (item) {
         rcc->channel->channel_cbs.hold_item(rcc, item);
@@ -909,23 +1002,25 @@ void red_channel_client_begin_send_message(RedChannelClient *rcc)
     SpiceMarshaller *m = rcc->send_data.marshaller;
 
     // TODO - better check: type in channel_allowed_types. Better: type in channel_allowed_types(channel_state)
-    if (rcc->send_data.header->type == 0) {
+    if (rcc->send_data.header.get_msg_type(&rcc->send_data.header) == 0) {
         red_printf("BUG: header->type == 0");
         return;
     }
     spice_marshaller_flush(m);
     rcc->send_data.size = spice_marshaller_get_total_size(m);
-    rcc->send_data.header->size = rcc->send_data.size - sizeof(SpiceDataHeader);
+    rcc->send_data.header.set_msg_size(&rcc->send_data.header,
+                                       rcc->send_data.size - rcc->send_data.header.header_size);
     rcc->ack_data.messages_window++;
-    rcc->send_data.header = NULL; /* avoid writing to this until we have a new message */
+    rcc->send_data.last_sent_serial = rcc->send_data.serial;
+    rcc->send_data.header.data = NULL; /* avoid writing to this until we have a new message */
     red_channel_client_send(rcc);
 }
 
 SpiceMarshaller *red_channel_client_switch_to_urgent_sender(RedChannelClient *rcc)
 {
     ASSERT(red_channel_client_no_item_being_sent(rcc));
-    ASSERT(rcc->send_data.header != NULL);
-    rcc->send_data.main.header = rcc->send_data.header;
+    ASSERT(rcc->send_data.header.data != NULL);
+    rcc->send_data.main.header_data = rcc->send_data.header.data;
     rcc->send_data.main.item = rcc->send_data.item;
 
     rcc->send_data.marshaller = rcc->send_data.urgent.marshaller;
@@ -938,8 +1033,10 @@ static void red_channel_client_restore_main_sender(RedChannelClient *rcc)
 {
     spice_marshaller_reset(rcc->send_data.urgent.marshaller);
     rcc->send_data.marshaller = rcc->send_data.main.marshaller;
-    rcc->send_data.header = rcc->send_data.main.header;
-    rcc->send_data.header->serial = rcc->send_data.serial;
+    rcc->send_data.header.data = rcc->send_data.main.header_data;
+    if (!rcc->is_mini_header) {
+        rcc->send_data.header.set_msg_serial(&rcc->send_data.header, rcc->send_data.serial);
+    }
     rcc->send_data.item = rcc->send_data.main.item;
 }
 
@@ -1069,7 +1166,6 @@ void red_channel_client_ack_set_client_window(RedChannelClient *rcc, int client_
     rcc->ack_data.client_window = client_window;
 }
 
-
 static void red_channel_remove_client(RedChannelClient *rcc)
 {
     ASSERT(pthread_equal(pthread_self(), rcc->channel->thread_id));
@@ -1127,6 +1223,19 @@ RedChannelClient *red_channel_client_create_dummy(int size,
     rcc->client = client;
     rcc->channel = channel;
     red_channel_client_set_remote_caps(rcc, num_common_caps, common_caps, num_caps, caps);
+    if (red_channel_client_test_remote_common_cap(rcc, SPICE_COMMON_CAP_MINI_HEADER)) {
+        rcc->incoming.header = mini_header_wrapper;
+        rcc->send_data.header = mini_header_wrapper;
+        rcc->is_mini_header = TRUE;
+    } else {
+        rcc->incoming.header = full_header_wrapper;
+        rcc->send_data.header = full_header_wrapper;
+        rcc->is_mini_header = FALSE;
+    }
+
+    rcc->incoming.header.data = rcc->incoming.header_buf;
+    rcc->incoming.serial = 1;
+
     red_channel_add_client(channel, rcc);
     return rcc;
 }
@@ -1200,7 +1309,7 @@ int red_channel_client_blocked(RedChannelClient *rcc)
 
 int red_channel_client_send_message_pending(RedChannelClient *rcc)
 {
-    return rcc->send_data.header->type != 0;
+    return rcc->send_data.header.get_msg_type(&rcc->send_data.header) != 0;
 }
 
 /* accessors for RedChannelClient */
@@ -1221,7 +1330,7 @@ RedClient *red_channel_client_get_client(RedChannelClient *rcc)
 
 void red_channel_client_set_header_sub_list(RedChannelClient *rcc, uint32_t sub_list)
 {
-    rcc->send_data.header->sub_list = sub_list;
+    rcc->send_data.header.set_msg_sub_list(&rcc->send_data.header, sub_list);
 }
 
 /* end of accessors */
diff --git a/server/red_channel.h b/server/red_channel.h
index 40792c1..045bfd4 100644
--- a/server/red_channel.h
+++ b/server/red_channel.h
@@ -33,10 +33,34 @@
 #define MAX_SEND_VEC 100
 #define CLIENT_ACK_WINDOW 20
 
+#define MAX_HEADER_SIZE sizeof(SpiceDataHeader)
+
 /* Basic interface for channels, without using the RedChannel interface.
    The intention is to move towards one channel interface gradually.
    At the final stage, this interface shouldn't be exposed. Only RedChannel will use it. */
 
+typedef struct SpiceDataHeaderOpaque SpiceDataHeaderOpaque;
+
+typedef uint16_t (*get_msg_type_proc)(SpiceDataHeaderOpaque *header);
+typedef uint32_t (*get_msg_size_proc)(SpiceDataHeaderOpaque *header);
+typedef void (*set_msg_type_proc)(SpiceDataHeaderOpaque *header, uint16_t type);
+typedef void (*set_msg_size_proc)(SpiceDataHeaderOpaque *header, uint32_t size);
+typedef void (*set_msg_serial_proc)(SpiceDataHeaderOpaque *header, uint64_t serial);
+typedef void (*set_msg_sub_list_proc)(SpiceDataHeaderOpaque *header, uint32_t sub_list);
+
+struct SpiceDataHeaderOpaque {
+    uint8_t *data;
+    uint16_t header_size;
+
+    set_msg_type_proc set_msg_type;
+    set_msg_size_proc set_msg_size;
+    set_msg_serial_proc set_msg_serial;
+    set_msg_sub_list_proc set_msg_sub_list;
+
+    get_msg_type_proc get_msg_type;
+    get_msg_size_proc get_msg_size;
+};
+
 typedef int (*handle_message_proc)(void *opaque,
                                    uint16_t type, uint32_t size, uint8_t *msg);
 typedef int (*handle_parsed_proc)(void *opaque, uint32_t size, uint16_t type, void *message);
@@ -58,10 +82,12 @@ typedef struct IncomingHandlerInterface {
 typedef struct IncomingHandler {
     IncomingHandlerInterface *cb;
     void *opaque;
-    SpiceDataHeader header;
+    uint8_t header_buf[MAX_HEADER_SIZE];
+    SpiceDataHeaderOpaque header;
     uint32_t header_pos;
     uint8_t *msg; // data of the msg following the header. allocated by alloc_msg_buf.
     uint32_t msg_pos;
+    uint64_t serial;
 } IncomingHandler;
 
 typedef int (*get_outgoing_msg_size_proc)(void *opaque);
@@ -202,21 +228,21 @@ struct RedChannelClient {
 
     struct {
         SpiceMarshaller *marshaller;
-        SpiceDataHeader *header;
+        SpiceDataHeaderOpaque header;
         uint32_t size;
         PipeItem *item;
         int blocked;
         uint64_t serial;
+        uint64_t last_sent_serial;
 
         struct {
             SpiceMarshaller *marshaller;
-            SpiceDataHeader *header;
+            uint8_t *header_data;
             PipeItem *item;
         } main;
 
         struct {
             SpiceMarshaller *marshaller;
-            SpiceDataHeader *header;
         } urgent;
     } send_data;
 
@@ -228,6 +254,7 @@ struct RedChannelClient {
     uint32_t pipe_size;
 
     RedChannelCapabilities remote_caps;
+    int is_mini_header;
 };
 
 struct RedChannel {
diff --git a/server/red_worker.c b/server/red_worker.c
index f454302..d096ee4 100644
--- a/server/red_worker.c
+++ b/server/red_worker.c
@@ -593,6 +593,9 @@ typedef struct CommonChannelClient {
     struct RedWorker *worker;
 } CommonChannelClient;
 
+/* Each drawable can refer to at most 3 images: src, brush and mask */
+#define MAX_DRAWABLE_PIXMAP_CACHE_ITEMS 3
+
 struct DisplayChannelClient {
     CommonChannelClient common;
 
@@ -616,6 +619,8 @@ struct DisplayChannelClient {
         RedCompressBuf *used_compress_bufs;
 
         FreeList free_list;
+        uint64_t pixmap_cache_items[MAX_DRAWABLE_PIXMAP_CACHE_ITEMS];
+        int num_pixmap_cache_items;
     } send_data;
 
     /* global lz encoding entities */
@@ -986,8 +991,7 @@ static void red_display_release_stream(RedWorker *worker, StreamAgent *agent);
 static inline void red_detach_stream(RedWorker *worker, Stream *stream);
 static void red_stop_stream(RedWorker *worker, Stream *stream);
 static inline void red_stream_maintenance(RedWorker *worker, Drawable *candidate, Drawable *sect);
-static inline void display_begin_send_message(RedChannelClient *rcc,
-                                              SpiceMarshaller *base_marshaller);
+static inline void display_begin_send_message(RedChannelClient *rcc);
 static void red_release_pixmap_cache(DisplayChannelClient *dcc);
 static void red_release_glz(DisplayChannelClient *dcc);
 static void red_freeze_glz(DisplayChannelClient *dcc);
@@ -6248,6 +6252,8 @@ static inline void red_display_add_image_to_pixmap_cache(RedChannelClient *rcc,
                                  image->descriptor.width * image->descriptor.height, is_lossy,
                                  dcc)) {
                 io_image->descriptor.flags |= SPICE_IMAGE_FLAGS_CACHE_ME;
+                dcc->send_data.pixmap_cache_items[dcc->send_data.num_pixmap_cache_items++] =
+                                                                               image->descriptor.id;
                 stat_inc_counter(display_channel->add_to_cache_counter, 1);
             }
         }
@@ -6290,6 +6296,8 @@ static FillBitsType fill_bits(DisplayChannelClient *dcc, SpiceMarshaller *m,
         int lossy_cache_item;
         if (pixmap_cache_hit(dcc->pixmap_cache, image.descriptor.id,
                              &lossy_cache_item, dcc)) {
+            dcc->send_data.pixmap_cache_items[dcc->send_data.num_pixmap_cache_items++] =
+                                                                               image.descriptor.id;
             if (can_lossy || !lossy_cache_item) {
                 if (!display_channel->enable_jpeg || lossy_cache_item) {
                     image.descriptor.type = SPICE_IMAGE_TYPE_FROM_CACHE;
@@ -6463,6 +6471,7 @@ static inline void red_display_reset_send_data(DisplayChannelClient *dcc)
 {
     red_display_reset_compress_buf(dcc);
     dcc->send_data.free_list.res->count = 0;
+    dcc->send_data.num_pixmap_cache_items = 0;
     memset(dcc->send_data.free_list.sync, 0, sizeof(dcc->send_data.free_list.sync));
 }
 
@@ -7780,27 +7789,123 @@ static void display_channel_push_release(DisplayChannelClient *dcc, uint8_t type
     free_list->res->resources[free_list->res->count++].id = id;
 }
 
-static inline void display_begin_send_message(RedChannelClient *rcc,
-                                              SpiceMarshaller *base_marshaller)
+static inline void display_marshal_sub_msg_inval_list(SpiceMarshaller *m,
+                                                       FreeList *free_list)
+{
+    /* type + size + submessage */
+    spice_marshaller_add_uint16(m, SPICE_MSG_DISPLAY_INVAL_LIST);
+    spice_marshaller_add_uint32(m, sizeof(*free_list->res) +
+                                free_list->res->count * sizeof(free_list->res->resources[0]));
+    spice_marshall_msg_display_inval_list(m, free_list->res);
+}
+
+static inline void display_marshal_sub_msg_inval_list_wait(SpiceMarshaller *m,
+                                                            FreeList *free_list)
+
+{
+    /* type + size + submessage */
+    spice_marshaller_add_uint16(m, SPICE_MSG_WAIT_FOR_CHANNELS);
+    spice_marshaller_add_uint32(m, sizeof(free_list->wait.header) +
+                                free_list->wait.header.wait_count * sizeof(free_list->wait.buf[0]));
+    spice_marshall_msg_wait_for_channels(m, &free_list->wait.header);
+}
+
+/* use legacy SpiceDataHeader (with sub_list) */
+static inline void display_channel_send_free_list_legacy(RedChannelClient *rcc)
+{
+    DisplayChannelClient *dcc = RCC_TO_DCC(rcc);
+    FreeList *free_list = &dcc->send_data.free_list;
+    SpiceMarshaller *marshaller;
+    int sub_list_len = 1;
+    SpiceMarshaller *wait_m = NULL;
+    SpiceMarshaller *inval_m;
+    SpiceMarshaller *sub_list_m;
+
+    marshaller = red_channel_client_get_marshaller(rcc);
+    inval_m = spice_marshaller_get_submarshaller(marshaller);
+
+    display_marshal_sub_msg_inval_list(inval_m, free_list);
+
+    if (free_list->wait.header.wait_count) {
+        wait_m = spice_marshaller_get_submarshaller(marshaller);
+        display_marshal_sub_msg_inval_list_wait(wait_m, free_list);
+        sub_list_len++;
+    }
+
+    sub_list_m = spice_marshaller_get_submarshaller(marshaller);
+    spice_marshaller_add_uint16(sub_list_m, sub_list_len);
+    if (wait_m) {
+        spice_marshaller_add_uint32(sub_list_m, spice_marshaller_get_offset(wait_m));
+    }
+    spice_marshaller_add_uint32(sub_list_m, spice_marshaller_get_offset(inval_m));
+    red_channel_client_set_header_sub_list(rcc, spice_marshaller_get_offset(sub_list_m));
+}
+
+/* use mini header and SPICE_MSG_LIST */
+static inline void display_channel_send_free_list(RedChannelClient *rcc)
+{
+    DisplayChannelClient *dcc = RCC_TO_DCC(rcc);
+    FreeList *free_list = &dcc->send_data.free_list;
+    int sub_list_len = 1;
+    SpiceMarshaller *urgent_marshaller;
+    SpiceMarshaller *wait_m = NULL;
+    SpiceMarshaller *inval_m;
+    uint32_t sub_arr_offset;
+    uint32_t wait_offset = 0;
+    uint32_t inval_offset = 0;
+    int i;
+
+    urgent_marshaller = red_channel_client_switch_to_urgent_sender(rcc);
+    for (i = 0; i < dcc->send_data.num_pixmap_cache_items; i++) {
+        int dummy;
+        /* When using the urgent marshaller, the serial number of the message that is
+         * going to be sent right after the SPICE_MSG_LIST, is increased by one.
+         * But all this message pixmaps cache references used its old serial.
+         * we use pixmap_cache_items to collect these pixmaps, and we update their serial by calling pixmap_cache_hit.*/
+        pixmap_cache_hit(dcc->pixmap_cache, dcc->send_data.pixmap_cache_items[i],
+                         &dummy, dcc);
+    }
+
+    if (free_list->wait.header.wait_count) {
+        red_channel_client_init_send_data(rcc, SPICE_MSG_LIST, NULL);
+    } else { /* only one message, no need for a list */
+        red_channel_client_init_send_data(rcc, SPICE_MSG_DISPLAY_INVAL_LIST, NULL);
+        spice_marshall_msg_display_inval_list(urgent_marshaller, free_list->res);
+        return;
+    }
+
+    inval_m = spice_marshaller_get_submarshaller(urgent_marshaller);
+    display_marshal_sub_msg_inval_list(inval_m, free_list);
+
+    if (free_list->wait.header.wait_count) {
+        wait_m = spice_marshaller_get_submarshaller(urgent_marshaller);
+        display_marshal_sub_msg_inval_list_wait(wait_m, free_list);
+        sub_list_len++;
+    }
+
+    sub_arr_offset = sub_list_len * sizeof(uint32_t);
+
+    spice_marshaller_add_uint16(urgent_marshaller, sub_list_len);
+    inval_offset = spice_marshaller_get_offset(inval_m); // calc the offset before
+                                                         // adding the sub list
+                                                         // offsets array to the marshaller
+    /* adding the array of offsets */
+    if (wait_m) {
+        wait_offset = spice_marshaller_get_offset(wait_m);
+        spice_marshaller_add_uint32(urgent_marshaller, wait_offset + sub_arr_offset);
+    }
+    spice_marshaller_add_uint32(urgent_marshaller, inval_offset + sub_arr_offset);
+}
+
+static inline void display_begin_send_message(RedChannelClient *rcc)
 {
     DisplayChannelClient *dcc = RCC_TO_DCC(rcc);
     FreeList *free_list = &dcc->send_data.free_list;
 
     if (free_list->res->count) {
-        int sub_list_len = 1;
-        SpiceMarshaller *wait_m = NULL;
-        SpiceMarshaller *inval_m;
         int sync_count = 0;
         int i;
 
-        inval_m = spice_marshaller_get_submarshaller(base_marshaller);
-
-        /* type + size + submessage */
-        spice_marshaller_add_uint16(inval_m, SPICE_MSG_DISPLAY_INVAL_LIST);
-        spice_marshaller_add_uint32(inval_m, sizeof(*free_list->res) +
-                        free_list->res->count * sizeof(free_list->res->resources[0]));
-        spice_marshall_msg_display_inval_list(inval_m, free_list->res);
-
         for (i = 0; i < MAX_CACHE_CLIENTS; i++) {
             if (i != dcc->common.id && free_list->sync[i] != 0) {
                 free_list->wait.header.wait_list[sync_count].channel_type = SPICE_CHANNEL_DISPLAY;
@@ -7810,24 +7915,11 @@ static inline void display_begin_send_message(RedChannelClient *rcc,
         }
         free_list->wait.header.wait_count = sync_count;
 
-        if (sync_count) {
-            wait_m = spice_marshaller_get_submarshaller(base_marshaller);
-
-            /* type + size + submessage */
-            spice_marshaller_add_uint16(wait_m, SPICE_MSG_WAIT_FOR_CHANNELS);
-            spice_marshaller_add_uint32(wait_m, sizeof(free_list->wait.header) +
-                                                sync_count * sizeof(free_list->wait.buf[0]));
-            spice_marshall_msg_wait_for_channels(wait_m, &free_list->wait.header);
-            sub_list_len++;
-        }
-
-        SpiceMarshaller *sub_list_m = spice_marshaller_get_submarshaller(base_marshaller);
-        spice_marshaller_add_uint16(sub_list_m, sub_list_len);
-        if (wait_m) {
-            spice_marshaller_add_uint32(sub_list_m, spice_marshaller_get_offset(wait_m));
+        if (rcc->is_mini_header) {
+            display_channel_send_free_list(rcc);
+        } else {
+            display_channel_send_free_list_legacy(rcc);
         }
-        spice_marshaller_add_uint32(sub_list_m, spice_marshaller_get_offset(inval_m));
-        red_channel_client_set_header_sub_list(rcc, spice_marshaller_get_offset(sub_list_m));
     }
     red_channel_client_begin_send_message(rcc);
 }
@@ -8495,7 +8587,7 @@ static void display_channel_send_item(RedChannelClient *rcc, PipeItem *pipe_item
 
     // a message is pending
     if (red_channel_client_send_message_pending(rcc)) {
-        display_begin_send_message(rcc, m);
+        display_begin_send_message(rcc);
     }
 }
 
diff --git a/server/snd_worker.c b/server/snd_worker.c
index 048da34..5d58077 100644
--- a/server/snd_worker.c
+++ b/server/snd_worker.c
@@ -101,7 +101,6 @@ struct SndChannel {
 
     struct {
         uint64_t serial;
-        SpiceDataHeader *header;
         SpiceMarshaller *marshaller;
         uint32_t size;
         uint32_t pos;
@@ -109,7 +108,7 @@ struct SndChannel {
 
     struct {
         uint8_t buf[RECIVE_BUF_SIZE];
-        SpiceDataHeader *message;
+        uint8_t *message_start;
         uint8_t *now;
         uint8_t *end;
     } recive_data;
@@ -417,10 +416,14 @@ static int snd_record_handle_message(SndChannel *channel, size_t size, uint32_t
 static void snd_receive(void* data)
 {
     SndChannel *channel = (SndChannel*)data;
+    SpiceDataHeaderOpaque *header;
+
     if (!channel) {
         return;
     }
 
+    header = &channel->channel_client->incoming.header;
+
     for (;;) {
         ssize_t n;
         n = channel->recive_data.end - channel->recive_data.now;
@@ -448,40 +451,44 @@ static void snd_receive(void* data)
         } else {
             channel->recive_data.now += n;
             for (;;) {
-                SpiceDataHeader *header = channel->recive_data.message;
-                uint8_t *data = (uint8_t *)(header+1);
+                uint8_t *msg_start = channel->recive_data.message_start;
+                uint8_t *data = msg_start + header->header_size;
                 size_t parsed_size;
                 uint8_t *parsed;
                 message_destructor_t parsed_free;
 
-                n = channel->recive_data.now - (uint8_t *)header;
-                if (n < sizeof(SpiceDataHeader) || n < sizeof(SpiceDataHeader) + header->size) {
+                header->data = msg_start;
+                n = channel->recive_data.now - msg_start;
+
+                if (n < header->header_size ||
+                    n < header->header_size + header->get_msg_size(header)) {
                     break;
                 }
-                parsed = channel->parser((void *)data, data + header->size, header->type,
+                parsed = channel->parser((void *)data, data + header->get_msg_size(header),
+                                         header->get_msg_type(header),
                                          SPICE_VERSION_MINOR, &parsed_size, &parsed_free);
                 if (parsed == NULL) {
-                    red_printf("failed to parse message type %d", header->type);
+                    red_printf("failed to parse message type %d", header->get_msg_type(header));
                     snd_disconnect_channel(channel);
                     return;
                 }
-                if (!channel->handle_message(channel, parsed_size, header->type, parsed)) {
+                if (!channel->handle_message(channel, parsed_size,
+                                             header->get_msg_type(header), parsed)) {
                     free(parsed);
                     snd_disconnect_channel(channel);
                     return;
                 }
                 parsed_free(parsed);
-                channel->recive_data.message = (SpiceDataHeader *)((uint8_t *)header +
-                                                                 sizeof(SpiceDataHeader) +
-                                                                 header->size);
+                channel->recive_data.message_start = msg_start + header->header_size +
+                                                     header->get_msg_size(header);
             }
-            if (channel->recive_data.now == (uint8_t *)channel->recive_data.message) {
+            if (channel->recive_data.now == channel->recive_data.message_start) {
                 channel->recive_data.now = channel->recive_data.buf;
-                channel->recive_data.message = (SpiceDataHeader *)channel->recive_data.buf;
+                channel->recive_data.message_start = channel->recive_data.buf;
             } else if (channel->recive_data.now == channel->recive_data.end) {
-                memcpy(channel->recive_data.buf, channel->recive_data.message, n);
+                memcpy(channel->recive_data.buf, channel->recive_data.message_start, n);
                 channel->recive_data.now = channel->recive_data.buf + n;
-                channel->recive_data.message = (SpiceDataHeader *)channel->recive_data.buf;
+                channel->recive_data.message_start = channel->recive_data.buf;
             }
         }
     }
@@ -501,28 +508,37 @@ static void snd_event(int fd, int event, void *data)
 
 static inline int snd_reset_send_data(SndChannel *channel, uint16_t verb)
 {
+    SpiceDataHeaderOpaque *header;
+
     if (!channel) {
         return FALSE;
     }
 
+    header = &channel->channel_client->send_data.header;
     spice_marshaller_reset(channel->send_data.marshaller);
-    channel->send_data.header = (SpiceDataHeader *)
-        spice_marshaller_reserve_space(channel->send_data.marshaller, sizeof(SpiceDataHeader));
-    spice_marshaller_set_base(channel->send_data.marshaller, sizeof(SpiceDataHeader));
+    header->data = spice_marshaller_reserve_space(channel->send_data.marshaller,
+                                                  header->header_size);
+    spice_marshaller_set_base(channel->send_data.marshaller,
+                              header->header_size);
     channel->send_data.pos = 0;
-    channel->send_data.header->sub_list = 0;
-    channel->send_data.header->size = 0;
-    channel->send_data.header->type = verb;
-    channel->send_data.header->serial = ++channel->send_data.serial;
+    header->set_msg_size(header, 0);
+    header->set_msg_type(header, verb);
+    channel->send_data.serial++;
+    if (!channel->channel_client->is_mini_header) {
+        header->set_msg_serial(header, channel->send_data.serial);
+        header->set_msg_sub_list(header, 0);
+    }
+
     return TRUE;
 }
 
 static int snd_begin_send_message(SndChannel *channel)
 {
+    SpiceDataHeaderOpaque *header = &channel->channel_client->send_data.header;
+
     spice_marshaller_flush(channel->send_data.marshaller);
     channel->send_data.size = spice_marshaller_get_total_size(channel->send_data.marshaller);
-    channel->send_data.header->size = channel->send_data.size - sizeof(SpiceDataHeader);
-    channel->send_data.header = NULL; /* avoid writing to this until we have a new message */
+    header->set_msg_size(header, channel->send_data.size - header->header_size);
     return snd_send_data(channel);
 }
 
@@ -709,22 +725,25 @@ static int snd_record_send_migrate(RecordChannel *record_channel)
 {
     SndChannel *channel = (SndChannel *)record_channel;
     SpiceMsgMigrate migrate;
-    SpiceDataHeader *header;
+    SpiceDataHeaderOpaque *header;
     RecordMigrateData *data;
 
     if (!snd_reset_send_data(channel, SPICE_MSG_MIGRATE)) {
         return FALSE;
     }
 
+    header = &channel->channel_client->send_data.header;
     migrate.flags = SPICE_MIGRATE_NEED_DATA_TRANSFER;
     spice_marshall_msg_migrate(channel->send_data.marshaller, &migrate);
 
-    header = (SpiceDataHeader *)spice_marshaller_reserve_space(channel->send_data.marshaller,
-                                                               sizeof(SpiceDataHeader));
-    header->type = SPICE_MSG_MIGRATE_DATA;
-    header->size = sizeof(RecordMigrateData);
-    header->serial = ++channel->send_data.serial;
-    header->sub_list = 0;
+    header->data = spice_marshaller_reserve_space(channel->send_data.marshaller, header->header_size);
+    header->set_msg_size(header, sizeof(RecordMigrateData));
+    header->set_msg_type(header, SPICE_MSG_MIGRATE_DATA);
+    ++channel->send_data.serial;
+    if (!channel->channel_client->is_mini_header) {
+        header->set_msg_serial(header, channel->send_data.serial);
+        header->set_msg_sub_list(header, 0);
+    }
 
     data = (RecordMigrateData *)spice_marshaller_reserve_space(channel->send_data.marshaller,
                                                                sizeof(RecordMigrateData));
@@ -735,7 +754,8 @@ static int snd_record_send_migrate(RecordChannel *record_channel)
     data->mode_time = record_channel->mode_time;
 
     channel->send_data.size = spice_marshaller_get_total_size(channel->send_data.marshaller);
-    channel->send_data.header->size = channel->send_data.size - sizeof(SpiceDataHeader) - sizeof(SpiceDataHeader) - sizeof(*data);
+    header->set_msg_size(header, channel->send_data.size - header->header_size -
+                         header->header_size - sizeof(*data));
 
     return snd_send_data(channel);
 }
@@ -876,6 +896,7 @@ static SndChannel *__new_channel(SndWorker *worker, int size, uint32_t channel_i
                                  snd_channel_handle_message_proc handle_message,
                                  snd_channel_on_message_done_proc on_message_done,
                                  snd_channel_cleanup_channel_proc cleanup,
+                                 uint32_t *common_caps, int num_common_caps,
                                  uint32_t *caps, int num_caps)
 {
     SndChannel *channel;
@@ -917,7 +938,7 @@ static SndChannel *__new_channel(SndWorker *worker, int size, uint32_t channel_i
     channel->parser = spice_get_client_channel_parser(channel_id, NULL);
     channel->stream = stream;
     channel->worker = worker;
-    channel->recive_data.message = (SpiceDataHeader *)channel->recive_data.buf;
+    channel->recive_data.message_start = channel->recive_data.buf;
     channel->recive_data.now = channel->recive_data.buf;
     channel->recive_data.end = channel->recive_data.buf + sizeof(channel->recive_data.buf);
     channel->send_data.marshaller = spice_marshaller_new();
@@ -938,7 +959,7 @@ static SndChannel *__new_channel(SndWorker *worker, int size, uint32_t channel_i
     channel->channel_client = red_channel_client_create_dummy(sizeof(RedChannelClient),
                                                               worker->base_channel,
                                                               client,
-                                                              0, NULL,
+                                                              num_common_caps, common_caps,
                                                               num_caps, caps);
     return channel;
 
@@ -1159,6 +1180,7 @@ static void snd_set_playback_peer(RedChannel *channel, RedClient *client, RedsSt
                                                               snd_playback_handle_message,
                                                               snd_playback_on_message_done,
                                                               snd_playback_cleanup,
+                                                              common_caps, num_common_caps,
                                                               caps, num_caps))) {
         goto error_2;
     }
@@ -1367,6 +1389,7 @@ static void snd_set_record_peer(RedChannel *channel, RedClient *client, RedsStre
                                                           snd_record_handle_message,
                                                           snd_record_on_message_done,
                                                           snd_record_cleanup,
+                                                          common_caps, num_common_caps,
                                                           caps, num_caps))) {
         goto error_2;
     }