add new virtualbox shared folders client

1 files changed, 86 insertions, 0 deletions

diff --git a/vboxhgcm.h b/vboxhgcm.h
new file mode 100644
index 0000000..3ccfa28
--- /dev/null
+++ b/vboxhgcm.h
@@ -0,0 +1,86 @@
+/*
+ * VBMouse - VirtualBox's HGCM protocol communication routines
+ * Copyright (C) 2022 Javier S. Pedro
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef VBOXHGCM_H
+#define VBOXHGCM_H
+
+#include "vbox.h"
+#include "vboxdev.h"
+
+typedef uint32_t hgcm_client_id_t;
+
+static void vbox_hgcm_wait(VMMDevHGCMRequestHeader __far * req)
+{
+	volatile uint32_t __far * req_flags = &req->fu32Flags;
+
+	while (!(*req_flags & VBOX_HGCM_REQ_DONE)) {
+		// TODO yield somehow?
+	}
+}
+
+static int32_t vbox_hgcm_connect_existing(LPVBOXCOMM vb, const char *service, hgcm_client_id_t __far *client_id)
+{
+	VMMDevHGCMConnect __far *req = (void __far *) vb->buf;
+
+	vbox_init_req(&req->header.header, VMMDevReq_HGCMConnect, sizeof(VMMDevHGCMConnect));
+	req->loc.type = VMMDevHGCMLoc_LocalHost_Existing;
+	_fstrcpy(req->loc.u.host.achName, service);
+
+	req->u32ClientID = 7;
+
+	vbox_send_request(vb->iobase, vb->dds.physicalAddress);
+
+	if (req->header.header.rc < 0) {
+		return req->header.header.rc;
+	} else if (req->header.header.rc == VINF_HGCM_ASYNC_EXECUTE) {
+		vbox_hgcm_wait(&req->header);
+	}
+
+	*client_id = req->u32ClientID;
+
+	return req->header.result;
+}
+
+static int32_t vbox_hgcm_disconnect(LPVBOXCOMM vb, hgcm_client_id_t client_id)
+{
+	VMMDevHGCMDisconnect __far *req = (void __far *) vb->buf;
+
+	vbox_init_req(&req->header.header, VMMDevReq_HGCMDisconnect, sizeof(VMMDevHGCMDisconnect));
+	req->u32ClientID = client_id;
+
+	vbox_send_request(vb->iobase, vb->dds.physicalAddress);
+
+	if (req->header.header.rc < 0) {
+		return req->header.header.rc;
+	} else if (req->header.header.rc == VINF_HGCM_ASYNC_EXECUTE) {
+		vbox_hgcm_wait(&req->header);
+	}
+
+	return req->header.result;
+}
+
+static inline void vbox_hgcm_init_call(VMMDevHGCMCall __far *req, hgcm_client_id_t client_id, uint32_t function, unsigned narg)
+{
+	vbox_init_req(&req->header.header, VMMDevReq_HGCMCall32, sizeof(VMMDevHGCMCall) + (narg * sizeof(HGCMFunctionParameter)));
+	req->u32ClientID = client_id;
+	req->u32Function = function;
+	req->cParms = narg;
+}
+
+#endif // VBOXHGCM_H