| 1 | /** @file
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| 2 | *
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| 3 | * VBox network devices:
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| 4 | * NAT network transport driver
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
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| 9 | *
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| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 11 | * available from http://www.virtualbox.org. This file is free software;
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| 12 | * you can redistribute it and/or modify it under the terms of the GNU
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| 13 | * General Public License as published by the Free Software Foundation,
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| 14 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 15 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 16 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 17 | *
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| 18 | * If you received this file as part of a commercial VirtualBox
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| 19 | * distribution, then only the terms of your commercial VirtualBox
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| 20 | * license agreement apply instead of the previous paragraph.
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| 21 | */
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| 22 |
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| 23 |
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| 24 | /*******************************************************************************
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| 25 | * Header Files *
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| 26 | *******************************************************************************/
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| 27 | #define LOG_GROUP LOG_GROUP_DRV_NAT
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| 28 | #include "Network/slirp/libslirp.h"
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| 29 | #include <VBox/pdm.h>
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| 30 | #include <VBox/cfgm.h>
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| 31 | #include <VBox/mm.h>
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| 32 | #include <VBox/err.h>
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| 33 |
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| 34 | #include <VBox/log.h>
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| 35 | #include <iprt/assert.h>
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| 36 | #include <iprt/file.h>
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| 37 | #include <iprt/string.h>
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| 38 |
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| 39 | #include "Builtins.h"
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| 40 |
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| 41 |
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| 42 | /*******************************************************************************
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| 43 | * Structures and Typedefs *
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| 44 | *******************************************************************************/
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| 45 | /**
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| 46 | * Block driver instance data.
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| 47 | */
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| 48 | typedef struct DRVNAT
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| 49 | {
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| 50 | /** The network interface. */
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| 51 | PDMINETWORKCONNECTOR INetworkConnector;
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| 52 | /** The port we're attached to. */
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| 53 | PPDMINETWORKPORT pPort;
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| 54 | /** Pointer to the driver instance. */
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| 55 | PPDMDRVINS pDrvIns;
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| 56 |
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| 57 | } DRVNAT, *PDRVNAT;
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| 58 |
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| 59 | /** Converts a pointer to NAT::INetworkConnector to a PRDVNAT. */
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| 60 | #define PDMINETWORKCONNECTOR_2_DRVNAT(pInterface) ( (PDRVNAT)((uintptr_t)pInterface - RT_OFFSETOF(DRVNAT, INetworkConnector)) )
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| 61 |
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| 62 |
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| 63 | /*******************************************************************************
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| 64 | * Global Variables *
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| 65 | *******************************************************************************/
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| 66 | /** @todo change this into a MAC -> PDRVNAT translation list. */
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| 67 | /** Pointer to the driver instance.
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| 68 | * This is required by slirp. */
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| 69 | static PDRVNAT g_pDrv = NULL;
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| 70 | #if 0
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| 71 | /** If set the thread should terminate. */
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| 72 | static bool g_fThreadTerm = false;
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| 73 | /** The thread id of the select thread (drvNATSelectThread()). */
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| 74 | static RTTHREAD g_ThreadSelect;
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| 75 |
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| 76 | static RTCRITSECT g_CritSectSlirp;
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| 77 | #endif
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| 78 |
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| 79 |
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| 80 | /**
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| 81 | * Send data to the network.
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| 82 | *
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| 83 | * @returns VBox status code.
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| 84 | * @param pInterface Pointer to the interface structure containing the called function pointer.
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| 85 | * @param pvBuf Data to send.
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| 86 | * @param cb Number of bytes to send.
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| 87 | * @thread EMT
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| 88 | */
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| 89 | static DECLCALLBACK(int) drvNATSend(PPDMINETWORKCONNECTOR pInterface, const void *pvBuf, size_t cb)
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| 90 | {
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| 91 | LogFlow(("drvNATSend: pvBuf=%p cb=%#x\n", pvBuf, cb));
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| 92 | Log2(("drvNATSend: pvBuf=%p cb=%#x\n"
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| 93 | "%.*Vhxd\n",
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| 94 | pvBuf, cb, cb, pvBuf));
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| 95 | slirp_input((uint8_t *)pvBuf, cb);
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| 96 | return VINF_SUCCESS;
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| 97 | }
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| 98 |
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| 99 |
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| 100 | /**
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| 101 | * Set promiscuous mode.
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| 102 | *
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| 103 | * This is called when the promiscuous mode is set. This means that there doesn't have
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| 104 | * to be a mode change when it's called.
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| 105 | *
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| 106 | * @param pInterface Pointer to the interface structure containing the called function pointer.
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| 107 | * @param fPromiscuous Set if the adaptor is now in promiscuous mode. Clear if it is not.
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| 108 | * @thread EMT
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| 109 | */
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| 110 | static DECLCALLBACK(void) drvNATSetPromiscuousMode(PPDMINETWORKCONNECTOR pInterface, bool fPromiscuous)
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| 111 | {
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| 112 | LogFlow(("drvNATSetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
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| 113 | /* nothing to do */
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| 114 | }
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| 115 |
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| 116 |
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| 117 | /**
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| 118 | * Notification on link status changes.
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| 119 | *
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| 120 | * @param pInterface Pointer to the interface structure containing the called function pointer.
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| 121 | * @param enmLinkState The new link state.
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| 122 | * @thread EMT
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| 123 | */
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| 124 | static DECLCALLBACK(void) drvNATNotifyLinkChanged(PPDMINETWORKCONNECTOR pInterface, PDMNETWORKLINKSTATE enmLinkState)
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| 125 | {
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| 126 | LogFlow(("drvNATNotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
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| 127 | switch (enmLinkState)
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| 128 | {
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| 129 | case PDMNETWORKLINKSTATE_UP:
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| 130 | LogRel(("NAT: link up\n"));
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| 131 | slirp_link_up();
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| 132 | break;
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| 133 | case PDMNETWORKLINKSTATE_DOWN:
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| 134 | case PDMNETWORKLINKSTATE_DOWN_RESUME:
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| 135 | LogRel(("NAT: link down\n"));
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| 136 | slirp_link_down();
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| 137 | break;
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| 138 | default:
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| 139 | AssertMsgFailed(("drvNATNotifyLinkChanged: unexpected link state %d\n", enmLinkState));
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| 140 | }
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| 141 | }
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| 142 |
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| 143 |
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| 144 | /**
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| 145 | * More receive buffer has become available.
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| 146 | *
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| 147 | * This is called when the NIC frees up receive buffers.
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| 148 | *
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| 149 | * @param pInterface Pointer to the interface structure containing the called function pointer.
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| 150 | * @thread EMT
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| 151 | */
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| 152 | static DECLCALLBACK(void) drvNATNotifyCanReceive(PPDMINETWORKCONNECTOR pInterface)
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| 153 | {
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| 154 | LogFlow(("drvNATNotifyCanReceive:\n"));
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| 155 | /** @todo do something useful here. */
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| 156 | }
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| 157 |
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| 158 |
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| 159 | /**
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| 160 | * Poller callback.
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| 161 | */
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| 162 | static DECLCALLBACK(void) drvNATPoller(PPDMDRVINS pDrvIns)
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| 163 | {
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| 164 | fd_set ReadFDs;
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| 165 | fd_set WriteFDs;
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| 166 | fd_set XcptFDs;
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| 167 | int cFDs = -1;
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| 168 | FD_ZERO(&ReadFDs);
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| 169 | FD_ZERO(&WriteFDs);
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| 170 | FD_ZERO(&XcptFDs);
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| 171 | slirp_select_fill(&cFDs, &ReadFDs, &WriteFDs, &XcptFDs);
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| 172 |
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| 173 | struct timeval tv = {0, 0}; /* no wait */
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| 174 | int cReadFDs = select(cFDs + 1, &ReadFDs, &WriteFDs, &XcptFDs, &tv);
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| 175 | if (cReadFDs >= 0)
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| 176 | slirp_select_poll(&ReadFDs, &WriteFDs, &XcptFDs);
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| 177 | }
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| 178 |
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| 179 |
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| 180 | /**
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| 181 | * Function called by slirp to check if it's possible to feed incoming data to the network port.
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| 182 | * @returns 1 if possible.
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| 183 | * @returns 0 if not possible.
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| 184 | */
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| 185 | int slirp_can_output(void)
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| 186 | {
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| 187 | if (g_pDrv)
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| 188 | return g_pDrv->pPort->pfnCanReceive(g_pDrv->pPort);
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| 189 | return 0;
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| 190 | }
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| 191 |
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| 192 |
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| 193 | /**
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| 194 | * Function called by slirp to feed incoming data to the network port.
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| 195 | */
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| 196 | void slirp_output(const uint8_t *pu8Buf, int cb)
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| 197 | {
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| 198 | Log2(("slirp_output: pu8Buf=%p cb=%#x (g_pDrv=%p)\n"
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| 199 | "%.*Vhxd\n",
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| 200 | pu8Buf, cb, g_pDrv,
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| 201 | cb, pu8Buf));
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| 202 | if (g_pDrv)
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| 203 | {
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| 204 | int rc = g_pDrv->pPort->pfnReceive(g_pDrv->pPort, pu8Buf, cb);
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| 205 | AssertRC(rc); NOREF(rc);
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| 206 | }
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| 207 | }
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| 208 |
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| 209 | /**
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| 210 | * Queries an interface to the driver.
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| 211 | *
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| 212 | * @returns Pointer to interface.
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| 213 | * @returns NULL if the interface was not supported by the driver.
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| 214 | * @param pInterface Pointer to this interface structure.
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| 215 | * @param enmInterface The requested interface identification.
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| 216 | * @thread Any thread.
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| 217 | */
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| 218 | static DECLCALLBACK(void *) drvNATQueryInterface(PPDMIBASE pInterface, PDMINTERFACE enmInterface)
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| 219 | {
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| 220 | PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
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| 221 | PDRVNAT pData = PDMINS2DATA(pDrvIns, PDRVNAT);
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| 222 | switch (enmInterface)
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| 223 | {
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| 224 | case PDMINTERFACE_BASE:
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| 225 | return &pDrvIns->IBase;
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| 226 | case PDMINTERFACE_NETWORK_CONNECTOR:
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| 227 | return &pData->INetworkConnector;
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| 228 | default:
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| 229 | return NULL;
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| 230 | }
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| 231 | }
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| 232 |
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| 233 |
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| 234 | /**
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| 235 | * Destruct a driver instance.
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| 236 | *
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| 237 | * Most VM resources are freed by the VM. This callback is provided so that any non-VM
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| 238 | * resources can be freed correctly.
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| 239 | *
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| 240 | * @param pDrvIns The driver instance data.
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| 241 | */
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| 242 | static DECLCALLBACK(void) drvNATDestruct(PPDMDRVINS pDrvIns)
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| 243 | {
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| 244 | LogFlow(("drvNATDestruct:\n"));
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| 245 | slirp_term();
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| 246 | g_pDrv = NULL;
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| 247 | }
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| 248 |
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| 249 |
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| 250 | /**
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| 251 | * Sets up the redirectors.
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| 252 | *
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| 253 | * @returns VBox status code.
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| 254 | * @param pCfgHandle The drivers configuration handle.
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| 255 | */
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| 256 | static int drvNATConstructRedir(PCFGMNODE pCfgHandle)
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| 257 | {
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| 258 | /*
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| 259 | * Enumerate redirections.
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| 260 | */
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| 261 | for (PCFGMNODE pNode = CFGMR3GetFirstChild(pCfgHandle); pNode; pNode = CFGMR3GetNextChild(pNode))
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| 262 | {
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| 263 | /* protocol type */
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| 264 | bool fUDP;
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| 265 | int rc = CFGMR3QueryBool(pNode, "UDP", &fUDP);
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| 266 | if (rc == VERR_CFGM_VALUE_NOT_FOUND)
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| 267 | fUDP = true;
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| 268 | else if (VBOX_FAILURE(rc))
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| 269 | {
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| 270 | AssertMsgFailed(("Configuration error: Boolean \"UDP\" -> %Vrc\n", rc));
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| 271 | return rc;
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| 272 | }
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| 273 |
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| 274 | /* host port */
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| 275 | int32_t iHostPort;
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| 276 | rc = CFGMR3QueryS32(pNode, "HostPort", &iHostPort);
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| 277 | if (VBOX_FAILURE(rc))
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| 278 | {
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| 279 | AssertMsgFailed(("Configuration error: Boolean \"HostPort\" -> %Vrc\n", rc));
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| 280 | return rc;
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| 281 | }
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| 282 |
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| 283 | /* guest port */
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| 284 | int32_t iGuestPort;
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| 285 | rc = CFGMR3QueryS32(pNode, "GuestPort", &iGuestPort);
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| 286 | if (VBOX_FAILURE(rc))
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| 287 | {
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| 288 | AssertMsgFailed(("Configuration error: Boolean \"GuestPort\" -> %Vrc\n", rc));
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| 289 | return rc;
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| 290 | }
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| 291 |
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| 292 | /* guest address */
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| 293 | char szGuestIP[32];
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| 294 | rc = CFGMR3QueryString(pNode, "GuestIP", &szGuestIP[0], sizeof(szGuestIP));
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| 295 | if (rc == VERR_CFGM_VALUE_NOT_FOUND)
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| 296 | strcpy(szGuestIP, "10.0.2.15");
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| 297 | else if (VBOX_FAILURE(rc))
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| 298 | {
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| 299 | AssertMsgFailed(("Configuration error: Boolean \"HostPort\" -> %Vrc\n", rc));
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| 300 | return rc;
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| 301 | }
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| 302 | struct in_addr GuestIP;
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| 303 | if (!inet_aton(szGuestIP, &GuestIP))
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| 304 | {
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| 305 | AssertMsgFailed(("Configuration error: Invalid \"GuestIP\"=\"%s\", inet_aton failed.\n", szGuestIP));
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| 306 | return VERR_NAT_REDIR_GUEST_IP;
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| 307 | }
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| 308 |
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| 309 | /*
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| 310 | * Call slirp about it.
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| 311 | */
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| 312 | Log(("drvNATConstruct: Redir %d -> %s:%d\n", iHostPort, szGuestIP, iGuestPort));
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| 313 | if (slirp_redir(fUDP, iHostPort, GuestIP, iGuestPort) < 0)
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| 314 | {
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| 315 | AssertMsgFailed(("Configuration error: failed to setup redirection of %d to %s:%d. Probably a conflict with existing services or other rules.\n",
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| 316 | iHostPort, szGuestIP, iGuestPort));
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| 317 | return VERR_NAT_REDIR_SETUP;
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| 318 | }
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| 319 | } /* for each redir rule */
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| 320 |
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| 321 | return VINF_SUCCESS;
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| 322 | }
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| 323 |
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| 324 |
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| 325 | /**
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| 326 | * Construct a NAT network transport driver instance.
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| 327 | *
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| 328 | * @returns VBox status.
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| 329 | * @param pDrvIns The driver instance data.
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| 330 | * If the registration structure is needed, pDrvIns->pDrvReg points to it.
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| 331 | * @param pCfgHandle Configuration node handle for the driver. Use this to obtain the configuration
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| 332 | * of the driver instance. It's also found in pDrvIns->pCfgHandle, but like
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| 333 | * iInstance it's expected to be used a bit in this function.
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| 334 | */
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| 335 | static DECLCALLBACK(int) drvNATConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle)
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| 336 | {
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| 337 | PDRVNAT pData = PDMINS2DATA(pDrvIns, PDRVNAT);
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| 338 | LogFlow(("drvNATConstruct:\n"));
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| 339 |
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| 340 | /*
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| 341 | * Validate the config.
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| 342 | */
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| 343 | if (!CFGMR3AreValuesValid(pCfgHandle, "\0"))
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| 344 | return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, "");
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| 345 |
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| 346 | /*
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| 347 | * Init the static parts.
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| 348 | */
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| 349 | pData->pDrvIns = pDrvIns;
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| 350 | /* IBase */
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| 351 | pDrvIns->IBase.pfnQueryInterface = drvNATQueryInterface;
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| 352 | /* INetwork */
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| 353 | pData->INetworkConnector.pfnSend = drvNATSend;
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| 354 | pData->INetworkConnector.pfnSetPromiscuousMode = drvNATSetPromiscuousMode;
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| 355 | pData->INetworkConnector.pfnNotifyLinkChanged = drvNATNotifyLinkChanged;
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| 356 | pData->INetworkConnector.pfnNotifyCanReceive = drvNATNotifyCanReceive;
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| 357 |
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| 358 | /*
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| 359 | * Query the network port interface.
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| 360 | */
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| 361 | pData->pPort = (PPDMINETWORKPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase, PDMINTERFACE_NETWORK_PORT);
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| 362 | if (!pData->pPort)
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| 363 | return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
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| 364 | N_("Configuration error: the above device/driver didn't export the network port interface!\n"));
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| 365 |
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| 366 | #if 0
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| 367 | /*
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| 368 | * The slirp lock and thread sem.
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| 369 | */
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| 370 | int rc = RTCritSectInit(&g_CritSectSlirp);
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| 371 | if (VBOX_FAILURE(rc))
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| 372 | return rc;
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| 373 | rc = RTSemEventCreate(&g_EventSem);
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| 374 | if (VBOX_SUCCESS(rc))
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| 375 | {
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| 376 | /*
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| 377 | * Start the select thread. (it'll block on the sem)
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| 378 | */
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| 379 | g_fThreadTerm = false;
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| 380 | rc = RTThreadCreate(&g_ThreadSelect, drvNATSelectThread, 0, NULL, "NATSEL");
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| 381 | if (VBOX_SUCCESS(rc))
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| 382 | {
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| 383 | #endif
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| 384 | int rc;
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| 385 | /*
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| 386 | * Initialize slirp.
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| 387 | */
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| 388 | rc = slirp_init();
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| 389 | if (VBOX_SUCCESS(rc))
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| 390 | {
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| 391 | rc = drvNATConstructRedir(pCfgHandle);
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| 392 | if (VBOX_SUCCESS(rc))
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| 393 | {
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| 394 | pDrvIns->pDrvHlp->pfnPDMPollerRegister(pDrvIns, drvNATPoller);
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| 395 | g_pDrv = pData;
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| 396 | #if 0
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| 397 | RTSemEventSignal(g_EventSem);
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| 398 | RTThreadSleep(0);
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| 399 | #endif
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| 400 | return VINF_SUCCESS;
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| 401 | }
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| 402 | /* failure path */
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| 403 | slirp_term();
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| 404 | }
|
|---|
| 405 | else
|
|---|
| 406 | {
|
|---|
| 407 | switch (rc)
|
|---|
| 408 | {
|
|---|
| 409 | case VERR_NAT_DNS:
|
|---|
| 410 | PDMDRV_SET_ERROR(pDrvIns, rc, N_("Domain Name Server (DNS) for NAT networking could not be determined"));
|
|---|
| 411 | break;
|
|---|
| 412 | default:
|
|---|
| 413 | PDMDRV_SET_ERROR(pDrvIns, rc, N_("Unknown error during NAT networking setup: "));
|
|---|
| 414 | AssertMsgFailed(("Add error message for rc=%d (%Vrc)\n", rc, rc));
|
|---|
| 415 | break;
|
|---|
| 416 | }
|
|---|
| 417 | }
|
|---|
| 418 | #if 0
|
|---|
| 419 | g_fThreadTerm = true;
|
|---|
| 420 | RTSemEventSignal(g_EventSem);
|
|---|
| 421 | RTThreadSleep(0);
|
|---|
| 422 | }
|
|---|
| 423 | RTSemEventDestroy(g_EventSem);
|
|---|
| 424 | g_EventSem = NULL;
|
|---|
| 425 | }
|
|---|
| 426 | RTCritSectDelete(&g_CritSectSlirp);
|
|---|
| 427 | #endif
|
|---|
| 428 | return rc;
|
|---|
| 429 | }
|
|---|
| 430 |
|
|---|
| 431 |
|
|---|
| 432 |
|
|---|
| 433 | /**
|
|---|
| 434 | * NAT network transport driver registration record.
|
|---|
| 435 | */
|
|---|
| 436 | const PDMDRVREG g_DrvNAT =
|
|---|
| 437 | {
|
|---|
| 438 | /* u32Version */
|
|---|
| 439 | PDM_DRVREG_VERSION,
|
|---|
| 440 | /* szDriverName */
|
|---|
| 441 | "NAT",
|
|---|
| 442 | /* pszDescription */
|
|---|
| 443 | "NAT Network Transport Driver",
|
|---|
| 444 | /* fFlags */
|
|---|
| 445 | PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
|
|---|
| 446 | /* fClass. */
|
|---|
| 447 | PDM_DRVREG_CLASS_NETWORK,
|
|---|
| 448 | /* cMaxInstances */
|
|---|
| 449 | 1,
|
|---|
| 450 | /* cbInstance */
|
|---|
| 451 | sizeof(DRVNAT),
|
|---|
| 452 | /* pfnConstruct */
|
|---|
| 453 | drvNATConstruct,
|
|---|
| 454 | /* pfnDestruct */
|
|---|
| 455 | drvNATDestruct,
|
|---|
| 456 | /* pfnIOCtl */
|
|---|
| 457 | NULL,
|
|---|
| 458 | /* pfnPowerOn */
|
|---|
| 459 | NULL,
|
|---|
| 460 | /* pfnReset */
|
|---|
| 461 | NULL,
|
|---|
| 462 | /* pfnSuspend */
|
|---|
| 463 | NULL,
|
|---|
| 464 | /* pfnResume */
|
|---|
| 465 | NULL,
|
|---|
| 466 | /* pfnDetach */
|
|---|
| 467 | NULL,
|
|---|
| 468 | /* pfnPowerOff */
|
|---|
| 469 | NULL
|
|---|
| 470 | };
|
|---|
