Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 354 insertions, 0 deletions

diff --git a/include/iprt/localipc.h b/include/iprt/localipc.h
new file mode 100644
index 00000000..e5baa5ab
--- /dev/null
+++ b/include/iprt/localipc.h
@@ -0,0 +1,354 @@
+/** @file
+ * IPRT - Local IPC Server & Client.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * 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, in version 3 of the
+ * License.
+ *
+ * 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, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef IPRT_INCLUDED_localipc_h
+#define IPRT_INCLUDED_localipc_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/cdefs.h>
+#include <iprt/types.h>
+#include <iprt/thread.h>
+
+#ifdef IN_RING0
+# error "There are no RTLocalIpc APIs available Ring-0 Host Context!"
+#endif
+
+
+RT_C_DECLS_BEGIN
+
+/** @defgroup grp_rt_localipc   RTLocalIpc - Local IPC
+ * @ingroup grp_rt
+ * @{
+ */
+
+/** Handle to a local IPC server instance. */
+typedef struct RTLOCALIPCSERVERINT     *RTLOCALIPCSERVER;
+/** Pointer to a local IPC server handle. */
+typedef RTLOCALIPCSERVER               *PRTLOCALIPCSERVER;
+/** Local IPC server handle nil value. */
+#define NIL_RTLOCALIPCSERVER            ((RTLOCALIPCSERVER)0)
+
+/** Handle to a local ICP session instance. */
+typedef struct RTLOCALIPCSESSIONINT    *RTLOCALIPCSESSION;
+/** Pointer to a local ICP session handle. */
+typedef RTLOCALIPCSESSION              *PRTLOCALIPCSESSION;
+/** Local ICP session handle nil value. */
+#define NIL_RTLOCALIPCSESSION           ((RTLOCALIPCSESSION)0)
+
+
+
+/**
+ * Create a local IPC server.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS on success and *phServer containing the instance handle.
+ *
+ * @param   phServer    Where to put the server instance handle.
+ * @param   pszName     The server name.  This must be unique and not include
+ *                      any special chars or slashes. It will be morphed into a
+ *                      unique platform specific identifier.
+ * @param   fFlags      Flags, see RTLOCALIPC_FLAGS_*.
+ */
+RTDECL(int) RTLocalIpcServerCreate(PRTLOCALIPCSERVER phServer, const char *pszName, uint32_t fFlags);
+
+/** @name RTLocalIpcServerCreate flags
+ * @{ */
+/** Native name, as apposed to a portable one. */
+#define RTLOCALIPC_FLAGS_NATIVE_NAME        RT_BIT_32(0)
+/** The mask of valid flags. */
+#define RTLOCALIPC_FLAGS_VALID_MASK         UINT32_C(0x00000001)
+/** @} */
+
+/**
+ * Destroys a local IPC server.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS if still other references or NIL.
+ * @retval  VINF_OBJECT_DESTROYED if actually destroyed.
+ *
+ * @param   hServer     The server handle. The nil value is quietly ignored (VINF_SUCCESS).
+ */
+RTDECL(int) RTLocalIpcServerDestroy(RTLOCALIPCSERVER hServer);
+
+/**
+ * Grant the specified group access to the local IPC server socket.
+ *
+ * @returns IPRT status code.
+ * @param   hServer     The server handle.
+ * @param   gid         Group ID.
+ */
+RTDECL(int) RTLocalIpcServerGrantGroupAccess(RTLOCALIPCSERVER hServer, RTGID gid);
+
+/**
+ * Set access mode for IPC server socket.
+ *
+ * @returns IPRT status code.
+ * @param   hServer     The server handle.
+ * @param   fMode       Access mode.
+ */
+RTDECL(int) RTLocalIpcServerSetAccessMode(RTLOCALIPCSERVER hServer, RTFMODE fMode);
+
+/**
+ * Listen for clients.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS on success and *phClientSession containing the session handle.
+ * @retval  VERR_CANCELLED if the listening was interrupted by RTLocalIpcServerCancel().
+ *
+ * @param   hServer             The server handle.
+ * @param   phClientSession     Where to store the client session handle on success.
+ *
+ */
+RTDECL(int) RTLocalIpcServerListen(RTLOCALIPCSERVER hServer, PRTLOCALIPCSESSION phClientSession);
+
+/**
+ * Cancel the current or subsequent RTLocalIpcServerListen call.
+ *
+ * @returns IPRT status code.
+ * @param   hServer     The server handle. The nil value is quietly ignored (VINF_SUCCESS).
+ */
+RTDECL(int) RTLocalIpcServerCancel(RTLOCALIPCSERVER hServer);
+
+
+/**
+ * Connects to a local IPC server.
+ *
+ * This is used a client process (or thread).
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS on success and *phSession holding the session handle.
+ *
+ * @param   phSession           Where to store the sesson handle on success.
+ * @param   pszName             The server name (see RTLocalIpcServerCreate for details).
+ * @param   fFlags              Flags, RTLOCALIPC_C_FLAGS_XXX.
+ */
+RTDECL(int) RTLocalIpcSessionConnect(PRTLOCALIPCSESSION phSession, const char *pszName, uint32_t fFlags);
+
+/** @name RTLOCALIPC_C_FLAGS_XXX - RTLocalIpcSessionConnect flags
+ * @{ */
+/** Native name, as apposed to a portable one. */
+#define RTLOCALIPC_C_FLAGS_NATIVE_NAME      RT_BIT_32(0)
+/** The mask of valid flags. */
+#define RTLOCALIPC_C_FLAGS_VALID_MASK       UINT32_C(0x00000001)
+/** @} */
+
+/**
+ * Closes the local IPC session.
+ *
+ * This can be used with sessions created by both RTLocalIpcSessionConnect
+ * and RTLocalIpcServerListen.  It will release one cancel pending I/O and
+ * relase one reference (typically the implict reference from the create API).
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS if still other references or NIL.
+ * @retval  VINF_OBJECT_DESTROYED if session destroyed.
+ *
+ * @param   hSession            The session handle. The nil value is quietly ignored (VINF_SUCCESS).
+ */
+RTDECL(int) RTLocalIpcSessionClose(RTLOCALIPCSESSION hSession);
+
+/**
+ * Retain a refence to the given session.
+ *
+ * @returns New reference count, UINT32_MAX if the handle is invalid.
+ * @param   hSession            The session handle.
+ */
+RTDECL(uint32_t) RTLocalIpcSessionRetain(RTLOCALIPCSESSION hSession);
+
+/**
+ * Releases a refence to the given session.
+ *
+ * This differs from RTLocalIpcSessionClose in that it won't cancel any pending
+ * I/O.  So, better call RTLocalIpcSessionClose if you want to terminate the
+ * session.
+ *
+ * @returns New reference count, 0 if NIL handle, UINT32_MAX if the handle is
+ *          invalid.
+ * @param   hSession            The session handle.
+ */
+RTDECL(uint32_t) RTLocalIpcSessionRelease(RTLOCALIPCSESSION hSession);
+
+
+/**
+ * Receive data from the other end of an local IPC session.
+ *
+ * This will block if there isn't any data.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_CANCELLED if the operation was cancelled by RTLocalIpcSessionCancel.
+ *
+ * @param   hSession            The session handle.
+ * @param   pvBuf               Where to store the data.
+ * @param   cbToRead            How much to read.  This is exact request if
+ *                              pcbRead is NULL, otherwise it's an upper limit.
+ * @param   pcbRead             Optional argument for indicating a partial read
+ *                              and returning the number of bytes actually read.
+ */
+RTDECL(int) RTLocalIpcSessionRead(RTLOCALIPCSESSION hSession, void *pvBuf, size_t cbToRead, size_t *pcbRead);
+
+/**
+ * Receive pending data from the other end of an local IPC session.
+ *
+ * This will not block to wait for data.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_TRY_AGAIN if no pending data (*pcbRead is set to 0).
+ * @retval  VERR_CANCELLED if a previous operation was cancelled by
+ *          RTLocalIpcSessionCancel (this operation isn't cancellable).
+ *
+ * @param   hSession            The session handle.
+ * @param   pvBuf               Where to store the data.
+ * @param   cbToRead            How much to read (upper limit).
+ * @param   pcbRead             Where to return exactly how much was read.
+ */
+RTDECL(int) RTLocalIpcSessionReadNB(RTLOCALIPCSESSION hSession, void *pvBuf, size_t cbToRead, size_t *pcbRead);
+
+/**
+ * Send data to the other end of an local IPC session.
+ *
+ * This may or may not block until the data is received by the other party,
+ * this is an implementation detail.  If you want to make sure that the data
+ * has been received you should always call RTLocalIpcSessionFlush().
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_CANCELLED if the operation was cancelled by RTLocalIpcSessionCancel.
+ *
+ * @param   hSession            The session handle.
+ * @param   pvBuf               The data to write.
+ * @param   cbToWrite           How much to write.
+ */
+RTDECL(int) RTLocalIpcSessionWrite(RTLOCALIPCSESSION hSession, const void *pvBuf, size_t cbToWrite);
+
+/**
+ * Flush any buffered data and (perhaps) wait for the other party to receive it.
+ *
+ * The waiting for the other party to receive the data is
+ * implementation dependent.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_CANCELLED if the operation was cancelled by RTLocalIpcSessionCancel.
+ *
+ * @param   hSession            The session handle.
+ */
+RTDECL(int) RTLocalIpcSessionFlush(RTLOCALIPCSESSION hSession);
+
+/**
+ * Wait for data to become ready for reading or for the session to be
+ * disconnected.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS when there is data to read.
+ * @retval  VERR_TIMEOUT if no data became available within the specified period (@a cMillies)
+ * @retval  VERR_BROKEN_PIPE if the session was disconnected.
+ * @retval  VERR_CANCELLED if the operation was cancelled by RTLocalIpcSessionCancel.
+ *
+ * @param   hSession            The session handle.
+ * @param   cMillies            The number of milliseconds to wait. Use RT_INDEFINITE_WAIT
+ *                              to wait forever.
+ *
+ * @remark  VERR_INTERRUPTED will not be returned. If this is desired at some later point
+ *          add a RTLocalIpcSessionWaitForDataNoResume() variant like we're using elsewhere.
+ */
+RTDECL(int) RTLocalIpcSessionWaitForData(RTLOCALIPCSESSION hSession, uint32_t cMillies);
+
+/**
+ * Cancells a pending or subsequent operation.
+ *
+ * Not all methods are cancellable, only those which are specfied
+ * returning VERR_CANCELLED.  The others are assumed to not be blocking
+ * for ever and ever.  However, the cancel is sticky, so the session must
+ * basically be trashed (closed) after calling this method.
+ *
+ * @returns IPRT status code.
+ *
+ * @param   hSession            The session handle.
+ */
+RTDECL(int) RTLocalIpcSessionCancel(RTLOCALIPCSESSION hSession);
+
+/**
+ * Query the process ID of the other party.
+ *
+ * This is an optional feature which may not be implemented, so don't
+ * depend on it and check for VERR_NOT_SUPPORTED.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS and *pProcess on success.
+ * @retval  VERR_CANCELLED if the operation was cancelled by RTLocalIpcSessionCancel.
+ * @retval  VERR_NOT_SUPPORTED and *pProcess = NIL_RTPROCESS if not supported.
+ *
+ * @param   hSession            The session handle.
+ * @param   pProcess            Where to store the process ID.
+ */
+RTDECL(int) RTLocalIpcSessionQueryProcess(RTLOCALIPCSESSION hSession, PRTPROCESS pProcess);
+
+/**
+ * Query the user ID of the other party.
+ *
+ * This is an optional feature which may not be implemented, so don't
+ * depend on it and check for VERR_NOT_SUPPORTED.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS and *pUid on success.
+ * @retval  VERR_CANCELLED if the operation was cancelled by RTLocalIpcSessionCancel.
+ * @retval  VERR_NOT_SUPPORTED and *pUid = NIL_RTUID if not supported.
+ *
+ * @param   hSession            The session handle.
+ * @param   pUid                Where to store the user ID on success.
+ */
+RTDECL(int) RTLocalIpcSessionQueryUserId(RTLOCALIPCSESSION hSession, PRTUID pUid);
+
+/**
+ * Query the group ID of the other party.
+ *
+ * This is an optional feature which may not be implemented, so don't
+ * depend on it and check for VERR_NOT_SUPPORTED.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS and *pUid on success.
+ * @retval  VERR_CANCELLED if the operation was cancelled by RTLocalIpcSessionCancel.
+ * @retval  VERR_NOT_SUPPORTED and *pGid = NIL_RTUID if not supported.
+ *
+ * @param   hSession            The session handle.
+ * @param   pGid                Where to store the group ID on success.
+ */
+RTDECL(int) RTLocalIpcSessionQueryGroupId(RTLOCALIPCSESSION hSession, PRTGID pGid);
+
+/** @} */
+RT_C_DECLS_END
+
+#endif /* !IPRT_INCLUDED_localipc_h */
+