/* $Id: VBoxNetAdpInternal.h $ */ /** @file * VBoxNetAdp - Network Filter Driver (Host), Internal Header. */ /* * Copyright (C) 2008-2022 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 . * * 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 VBOX_INCLUDED_SRC_VBoxNetAdp_VBoxNetAdpInternal_h #define VBOX_INCLUDED_SRC_VBoxNetAdp_VBoxNetAdpInternal_h #ifndef RT_WITHOUT_PRAGMA_ONCE # pragma once #endif #include #include #include #include RT_C_DECLS_BEGIN /** Pointer to the globals. */ typedef struct VBOXNETADPGLOBALS *PVBOXNETADPGLOBALS; #define VBOXNETADP_MAX_INSTANCES 128 #define VBOXNETADP_MAX_UNITS 128 #define VBOXNETADP_NAME "vboxnet" #define VBOXNETADP_MAX_NAME_LEN 32 #define VBOXNETADP_MTU 1500 #if defined(RT_OS_DARWIN) # define VBOXNETADP_MAX_FAMILIES 4 # define VBOXNETADP_DETACH_TIMEOUT 500 #endif #define VBOXNETADP_CTL_DEV_NAME "vboxnetctl" #define VBOXNETADP_CTL_ADD _IOWR('v', 1, VBOXNETADPREQ) #define VBOXNETADP_CTL_REMOVE _IOW('v', 2, VBOXNETADPREQ) typedef struct VBoxNetAdpReq { char szName[VBOXNETADP_MAX_NAME_LEN]; } VBOXNETADPREQ; typedef VBOXNETADPREQ *PVBOXNETADPREQ; /** * Void entries mark vacant slots in adapter array. Valid entries are busy slots. * As soon as slot is being modified its state changes to transitional. * An entry in transitional state must only be accessed by the thread that * put it to this state. */ /** * To avoid races on adapter fields we stick to the following rules: * - rewrite: Int net port calls are serialized * - No modifications are allowed on busy adapters (deactivate first) * Refuse to destroy adapter until it gets to available state * - No transfers (thus getting busy) on inactive adapters * - Init sequence: void->available->connected->active 1) Create 2) Connect 3) Activate * - Destruction sequence: active->connected->available->void 1) Deactivate 2) Disconnect 3) Destroy */ enum VBoxNetAdpState { kVBoxNetAdpState_Invalid, kVBoxNetAdpState_Transitional, kVBoxNetAdpState_Active, kVBoxNetAdpState_32BitHack = 0x7FFFFFFF }; typedef enum VBoxNetAdpState VBOXNETADPSTATE; struct VBoxNetAdapter { /** Denotes availability of this slot in adapter array. */ VBOXNETADPSTATE enmState; /** Corresponds to the digit at the end of device name. */ int iUnit; union { #ifdef VBOXNETADP_OS_SPECFIC struct { # if defined(RT_OS_DARWIN) /** @name Darwin instance data. * @{ */ /** Event to signal detachment of interface. */ RTSEMEVENT hEvtDetached; /** Pointer to Darwin interface structure. */ ifnet_t pIface; /** MAC address. */ RTMAC Mac; /** @} */ # elif defined(RT_OS_LINUX) /** @name Darwin instance data. * @{ */ /** Pointer to Linux network device structure. */ struct net_device *pNetDev; /** @} */ # elif defined(RT_OS_FREEBSD) /** @name FreeBSD instance data. * @{ */ struct ifnet *ifp; /** @} */ # else # error PORTME # endif } s; #endif /** Union alignment to a pointer. */ void *pvAlign; /** Padding. */ uint8_t abPadding[64]; } u; /** The interface name. */ char szName[VBOXNETADP_MAX_NAME_LEN]; }; typedef struct VBoxNetAdapter VBOXNETADP; typedef VBOXNETADP *PVBOXNETADP; /* Paranoia checks for alignment and padding. */ AssertCompileMemberAlignment(VBOXNETADP, u, ARCH_BITS/8); AssertCompileMemberAlignment(VBOXNETADP, szName, ARCH_BITS/8); AssertCompileMembersSameSize(VBOXNETADP, u, VBOXNETADP, u.abPadding); DECLHIDDEN(int) vboxNetAdpInit(void); DECLHIDDEN(void) vboxNetAdpShutdown(void); DECLHIDDEN(int) vboxNetAdpCreate(PVBOXNETADP *ppNew, const char *pcszName); DECLHIDDEN(int) vboxNetAdpDestroy(PVBOXNETADP pThis); DECLHIDDEN(PVBOXNETADP) vboxNetAdpFindByName(const char *pszName); DECLHIDDEN(void) vboxNetAdpComposeMACAddress(PVBOXNETADP pThis, PRTMAC pMac); /** * This is called to perform OS-specific structure initializations. * * @return IPRT status code. * @param pThis The new instance. * * @remarks Owns no locks. */ DECLHIDDEN(int) vboxNetAdpOsInit(PVBOXNETADP pThis); /** * Counter part to vboxNetAdpOsCreate(). * * @return IPRT status code. * @param pThis The new instance. * * @remarks May own the semaphores for the global list, the network lock and the out-bound trunk port. */ DECLHIDDEN(void) vboxNetAdpOsDestroy(PVBOXNETADP pThis); /** * This is called to attach to the actual host interface * after linking the instance into the list. * * @return IPRT status code. * @param pThis The new instance. * @param pMac The MAC address to use for this instance. * * @remarks Owns no locks. */ DECLHIDDEN(int) vboxNetAdpOsCreate(PVBOXNETADP pThis, PCRTMAC pMac); RT_C_DECLS_END #endif /* !VBOX_INCLUDED_SRC_VBoxNetAdp_VBoxNetAdpInternal_h */