net/vmnet: implement shared mode (vmnet-shared)

Interaction with vmnet.framework in different modes
differs only on configuration stage, so we can create
common `send`, `receive`, etc. procedures and reuse them.

Reviewed-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Tested-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Signed-off-by: Phillip Tennen <phillip@axleos.com>
Signed-off-by: Vladislav Yaroshchuk <Vladislav.Yaroshchuk@jetbrains.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

1 files changed, 39 insertions, 1 deletions

diff --git a/net/vmnet_int.h b/net/vmnet_int.h
index c383038..adf6e8c 100644
--- a/net/vmnet_int.h
+++ b/net/vmnet_int.h
@@ -15,11 +15,49 @@
 #include "clients.h"
 
 #include <vmnet/vmnet.h>
+#include <dispatch/dispatch.h>
+
+/**
+ *  From vmnet.framework documentation
+ *
+ *  Each read/write call allows up to 200 packets to be
+ *  read or written for a maximum of 256KB.
+ *
+ *  Each packet written should be a complete
+ *  ethernet frame.
+ *
+ *  https://developer.apple.com/documentation/vmnet
+ */
+#define VMNET_PACKETS_LIMIT 200
 
 typedef struct VmnetState {
-  NetClientState nc;
+    NetClientState nc;
+    interface_ref vmnet_if;
+
+    uint64_t mtu;
+    uint64_t max_packet_size;
 
+    dispatch_queue_t if_queue;
+
+    QEMUBH *send_bh;
+
+    struct vmpktdesc packets_buf[VMNET_PACKETS_LIMIT];
+    int packets_send_current_pos;
+    int packets_send_end_pos;
+
+    struct iovec iov_buf[VMNET_PACKETS_LIMIT];
 } VmnetState;
 
+const char *vmnet_status_map_str(vmnet_return_t status);
+
+int vmnet_if_create(NetClientState *nc,
+                    xpc_object_t if_desc,
+                    Error **errp);
+
+ssize_t vmnet_receive_common(NetClientState *nc,
+                             const uint8_t *buf,
+                             size_t size);
+
+void vmnet_cleanup_common(NetClientState *nc);
 
 #endif /* VMNET_INT_H */