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/* $Id: DrvUDP.cpp $ */
/** @file
* UDP socket stream driver.
*/
/*
* Copyright (C) 2015-2023 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>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_DRV_UDP
#include <VBox/log.h>
#include <VBox/vmm/pdmdrv.h>
#include "VBoxDD.h"
#include <iprt/socket.h>
#include <iprt/udp.h>
#include <iprt/uuid.h>
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
/** Converts a pointer to DRVUDP::IStream to a PDRVUDP. */
#define PDMISTREAM_2_DRVUDP(pInterface) ( (PDRVUDP)((uintptr_t)pInterface - RT_UOFFSETOF(DRVUDP, IStream)) )
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/**
* UDP driver instance data.
*
* @implements PDMISTREAM
*/
typedef struct DRVUDP
{
/** The stream interface. */
PDMISTREAM IStream;
/** Pointer to the driver instance. */
PPDMDRVINS pDrvIns;
/** The server port. */
uint16_t uServerPort;
/** The server address. */
char *pszServerAddress;
/** The resolved server address struct. */
RTNETADDR ServerAddr;
/** The UDP socket. */
RTSOCKET hSocket;
} DRVUDP, *PDRVUDP;
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
/** @interface_method_impl{PDMISTREAM,pfnRead} */
static DECLCALLBACK(int) drvUDPRead(PPDMISTREAM pInterface, void *pvBuf, size_t *pcbRead)
{
int rc = VINF_SUCCESS;
PDRVUDP pThis = PDMISTREAM_2_DRVUDP(pInterface);
LogFlowFunc(("pvBuf=%p *pcbRead=%#x (%s:%u)\n", pvBuf, *pcbRead, pThis->pszServerAddress, pThis->uServerPort));
Assert(pvBuf);
Assert(pcbRead);
if (pThis->hSocket != NIL_RTSOCKET)
{
size_t cbReallyRead = 0;
rc = RTSocketRead(pThis->hSocket, pvBuf, *pcbRead, &cbReallyRead);
if (RT_SUCCESS(rc))
*pcbRead = cbReallyRead;
}
else
rc = VERR_NET_NOT_SOCKET;
LogFlowFunc(("*pcbRead=%zu returns %Rrc\n", *pcbRead, rc));
return rc;
}
/** @interface_method_impl{PDMISTREAM,pfnWrite} */
static DECLCALLBACK(int) drvUDPWrite(PPDMISTREAM pInterface, const void *pvBuf, size_t *pcbWrite)
{
int rc = VINF_SUCCESS;
PDRVUDP pThis = PDMISTREAM_2_DRVUDP(pInterface);
LogFlowFunc(("pvBuf=%p *pcbWrite=%#x (%s:%u)\n", pvBuf, *pcbWrite, pThis->pszServerAddress, pThis->uServerPort));
Assert(pvBuf);
Assert(pcbWrite);
if (pThis->hSocket != NIL_RTSOCKET)
{
size_t cbBuf = *pcbWrite;
rc = RTSocketWriteTo(pThis->hSocket, pvBuf, cbBuf, NULL /*pDstAddr*/);
if (RT_SUCCESS(rc))
*pcbWrite = cbBuf;
}
else
rc = VERR_NET_NOT_SOCKET;
LogFlowFunc(("*pcbWrite=%zu returns %Rrc\n", *pcbWrite, rc));
return rc;
}
/**
* @interface_method_impl{PDMIBASE,pfnQueryInterface}
*/
static DECLCALLBACK(void *) drvUDPQueryInterface(PPDMIBASE pInterface, const char *pszIID)
{
PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
PDRVUDP pThis = PDMINS_2_DATA(pDrvIns, PDRVUDP);
PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
PDMIBASE_RETURN_INTERFACE(pszIID, PDMISTREAM, &pThis->IStream);
return NULL;
}
/* -=-=-=-=- PDMDRVREG -=-=-=-=- */
/**
* Destruct a UDP socket stream driver instance.
*
* Most VM resources are freed by the VM. This callback is provided so that
* any non-VM resources can be freed correctly.
*
* @param pDrvIns The driver instance data.
*/
static DECLCALLBACK(void) drvUDPDestruct(PPDMDRVINS pDrvIns)
{
PDRVUDP pThis = PDMINS_2_DATA(pDrvIns, PDRVUDP);
LogFlowFunc(("\n"));
PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
if (pThis->hSocket != NIL_RTSOCKET)
{
/*
* We shutdown the socket here to poke out any blocking socket reads. The caller
* on the other thread/s need to ensure that they do -not- invoke drvUDPRead()
* or drvUDPWrite() after this.
*/
RTSocketRetain(pThis->hSocket);
RTSocketShutdown(pThis->hSocket, true, true);
RTSocketClose(pThis->hSocket);
pThis->hSocket = NIL_RTSOCKET;
LogRel(("DrvUDP#%u: Closed socket to %s:%u\n", pThis->pDrvIns->iInstance, pThis->pszServerAddress, pThis->uServerPort));
}
PDMDrvHlpMMHeapFree(pDrvIns, pThis->pszServerAddress);
pThis->pszServerAddress = NULL;
}
/**
* Construct a UDP socket stream driver instance.
*
* @copydoc FNPDMDRVCONSTRUCT
*/
static DECLCALLBACK(int) drvUDPConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
{
RT_NOREF1(fFlags);
PDRVUDP pThis = PDMINS_2_DATA(pDrvIns, PDRVUDP);
PCPDMDRVHLPR3 pHlp = pDrvIns->pHlpR3;
PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
/*
* Init the static parts.
*/
pThis->pDrvIns = pDrvIns;
/* IBase */
pDrvIns->IBase.pfnQueryInterface = drvUDPQueryInterface;
/* IStream */
pThis->IStream.pfnRead = drvUDPRead;
pThis->IStream.pfnWrite = drvUDPWrite;
/*
* Validate and read the configuration.
*/
PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "ServerAddress|ServerPort", "");
int rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "ServerAddress", &pThis->pszServerAddress);
if (RT_FAILURE(rc))
return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
N_("Configuration error: querying \"ServerAddress\" resulted in %Rrc"), rc);
rc = pHlp->pfnCFGMQueryU16(pCfg, "ServerPort", &pThis->uServerPort);
if (RT_FAILURE(rc))
return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
N_("Configuration error: querying \"ServerPort\" resulted in %Rrc"), rc);
/*
* Create the socket and connect.
*/
rc = RTUdpCreateClientSocket(pThis->pszServerAddress, pThis->uServerPort, NULL, &pThis->hSocket);
if (RT_SUCCESS(rc))
LogRel(("DrvUDP#%u: Connected socket to %s:%u\n",
pThis->pDrvIns->iInstance, pThis->pszServerAddress, pThis->uServerPort));
else
LogRel(("DrvUDP#%u: Failed to create/connect socket to %s:%u rc=%Rrc\n",
pThis->pDrvIns->iInstance, pThis->pszServerAddress, pThis->uServerPort, rc));
return VINF_SUCCESS;
}
/**
* UDP socket driver registration record.
*/
const PDMDRVREG g_DrvUDP =
{
/* u32Version */
PDM_DRVREG_VERSION,
/* szName */
"UDP",
/* szRCMod */
"",
/* szR0Mod */
"",
/* pszDescription */
"UDP socket stream driver.",
/* fFlags */
PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
/* fClass. */
PDM_DRVREG_CLASS_STREAM,
/* cMaxInstances */
~0U,
/* cbInstance */
sizeof(DRVUDP),
/* pfnConstruct */
drvUDPConstruct,
/* pfnDestruct */
drvUDPDestruct,
/* pfnRelocate */
NULL,
/* pfnIOCtl */
NULL,
/* pfnPowerOn */
NULL,
/* pfnReset */
NULL,
/* pfnSuspend */
NULL,
/* pfnResume */
NULL,
/* pfnAttach */
NULL,
/* pfnDetach */
NULL,
/* pfnPowerOff */
NULL,
/* pfnSoftReset */
NULL,
/* u32EndVersion */
PDM_DRVREG_VERSION
};
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