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/* $Id: DBGCIoProvUdp.cpp $ */
/** @file
* DBGC - Debugger Console, UDP I/O provider.
*/
/*
* Copyright (C) 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>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <VBox/dbg.h>
#include <VBox/err.h>
#include <VBox/log.h>
#include <iprt/mem.h>
#include <iprt/udp.h>
#include <iprt/assert.h>
#include "DBGCIoProvInternal.h"
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/**
* Debug console UDP connection data.
*/
typedef struct DBGCUDPSRV
{
/** The I/O callback table for the console. */
DBGCIO Io;
/** The socket of the connection. */
RTSOCKET hSock;
/** The address of the peer. */
RTNETADDR NetAddrPeer;
/** Flag whether the peer address was set. */
bool fPeerSet;
/** Connection status. */
bool fAlive;
} DBGCUDPSRV;
/** Pointer to the instance data of the console UDP backend. */
typedef DBGCUDPSRV *PDBGCUDPSRV;
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
/**
* @interface_method_impl{DBGCIO,pfnDestroy}
*/
static DECLCALLBACK(void) dbgcIoProvUdpIoDestroy(PCDBGCIO pIo)
{
RT_NOREF(pIo);
}
/**
* @interface_method_impl{DBGCIO,pfnInput}
*/
static DECLCALLBACK(bool) dbgcIoProvUdpIoInput(PCDBGCIO pIo, uint32_t cMillies)
{
PDBGCUDPSRV pUdpSrv = RT_FROM_MEMBER(pIo, DBGCUDPSRV, Io);
if (!pUdpSrv->fAlive)
return false;
int rc = RTSocketSelectOne(pUdpSrv->hSock, cMillies);
if (RT_FAILURE(rc) && rc != VERR_TIMEOUT)
pUdpSrv->fAlive = false;
return rc != VERR_TIMEOUT;
}
/**
* @interface_method_impl{DBGCIO,pfnRead}
*/
static DECLCALLBACK(int) dbgcIoProvUdpIoRead(PCDBGCIO pIo, void *pvBuf, size_t cbBuf, size_t *pcbRead)
{
PDBGCUDPSRV pUdpSrv = RT_FROM_MEMBER(pIo, DBGCUDPSRV, Io);
if (!pUdpSrv->fAlive)
return VERR_INVALID_HANDLE;
int rc = RTSocketReadFrom(pUdpSrv->hSock, pvBuf, cbBuf, pcbRead, &pUdpSrv->NetAddrPeer);
if (RT_SUCCESS(rc) && pcbRead != NULL && *pcbRead == 0)
rc = VERR_NET_SHUTDOWN;
if (RT_FAILURE(rc))
pUdpSrv->fAlive = false;
pUdpSrv->fPeerSet = true;
return rc;
}
/**
* @interface_method_impl{DBGCIO,pfnWrite}
*/
static DECLCALLBACK(int) dbgcIoProvUdpIoWrite(PCDBGCIO pIo, const void *pvBuf, size_t cbBuf, size_t *pcbWritten)
{
PDBGCUDPSRV pUdpSrv = RT_FROM_MEMBER(pIo, DBGCUDPSRV, Io);
if ( !pUdpSrv->fAlive
|| !pUdpSrv->fPeerSet)
return VERR_INVALID_HANDLE;
int rc = RTSocketWriteTo(pUdpSrv->hSock, pvBuf, cbBuf, &pUdpSrv->NetAddrPeer);
if (RT_FAILURE(rc))
pUdpSrv->fAlive = false;
if (pcbWritten)
*pcbWritten = cbBuf;
return rc;
}
/**
* @interface_method_impl{DBGCIO,pfnSetReady}
*/
static DECLCALLBACK(void) dbgcIoProvUdpIoSetReady(PCDBGCIO pIo, bool fReady)
{
/* stub */
NOREF(pIo);
NOREF(fReady);
}
/**
* @interface_method_impl{DBGCIOPROVREG,pfnCreate}
*/
static DECLCALLBACK(int) dbgcIoProvUdpCreate(PDBGCIOPROV phDbgcIoProv, PCFGMNODE pCfg)
{
/*
* Get the port configuration.
*/
uint32_t u32Port;
int rc = CFGMR3QueryU32Def(pCfg, "Port", &u32Port, 5000);
if (RT_FAILURE(rc))
{
LogRel(("Configuration error: Failed querying \"Port\" -> rc=%Rc\n", rc));
return rc;
}
/*
* Get the address configuration.
*/
char szAddress[512];
rc = CFGMR3QueryStringDef(pCfg, "Address", szAddress, sizeof(szAddress), "");
if (RT_FAILURE(rc))
{
LogRel(("Configuration error: Failed querying \"Address\" -> rc=%Rc\n", rc));
return rc;
}
PDBGCUDPSRV pUdpSrv = (PDBGCUDPSRV)RTMemAllocZ(sizeof(*pUdpSrv));
if (RT_LIKELY(pUdpSrv))
{
pUdpSrv->Io.pfnDestroy = dbgcIoProvUdpIoDestroy;
pUdpSrv->Io.pfnInput = dbgcIoProvUdpIoInput;
pUdpSrv->Io.pfnRead = dbgcIoProvUdpIoRead;
pUdpSrv->Io.pfnWrite = dbgcIoProvUdpIoWrite;
pUdpSrv->Io.pfnPktBegin = NULL;
pUdpSrv->Io.pfnPktEnd = NULL;
pUdpSrv->Io.pfnSetReady = dbgcIoProvUdpIoSetReady;
pUdpSrv->fPeerSet = false;
pUdpSrv->fAlive = true;
/*
* Create the server.
*/
rc = RTUdpCreateServerSocket(szAddress, u32Port, &pUdpSrv->hSock);
if (RT_SUCCESS(rc))
{
LogFlow(("dbgcIoProvUdpCreate: Created server on port %d %s\n", u32Port, szAddress));
*phDbgcIoProv = (DBGCIOPROV)pUdpSrv;
return rc;
}
}
else
rc = VERR_NO_MEMORY;
return rc;
}
/**
* @interface_method_impl{DBGCIOPROVREG,pfnDestroy}
*/
static DECLCALLBACK(void) dbgcIoProvUdpDestroy(DBGCIOPROV hDbgcIoProv)
{
PDBGCUDPSRV pUdpSrv = (PDBGCUDPSRV)hDbgcIoProv;
RTSocketRelease(pUdpSrv->hSock);
pUdpSrv->fAlive = false;
RTMemFree(pUdpSrv);
}
/**
* @interface_method_impl{DBGCIOPROVREG,pfnWaitForConnect}
*/
static DECLCALLBACK(int) dbgcIoProvUdpWaitForConnect(DBGCIOPROV hDbgcIoProv, RTMSINTERVAL cMsTimeout, PCDBGCIO *ppDbgcIo)
{
PDBGCUDPSRV pUdpSrv = (PDBGCUDPSRV)hDbgcIoProv;
/* Wait for the first datagram. */
int rc = RTSocketSelectOne(pUdpSrv->hSock, cMsTimeout);
if (RT_SUCCESS(rc))
*ppDbgcIo = &pUdpSrv->Io;
return rc;
}
/**
* @interface_method_impl{DBGCIOPROVREG,pfnWaitInterrupt}
*/
static DECLCALLBACK(int) dbgcIoProvUdpWaitInterrupt(DBGCIOPROV hDbgcIoProv)
{
RT_NOREF(hDbgcIoProv);
/** @todo */
return VINF_SUCCESS;
}
/**
* UDP I/O provider registration record.
*/
const DBGCIOPROVREG g_DbgcIoProvUdp =
{
/** pszName */
"udp",
/** pszDesc */
"UDP I/O provider.",
/** pfnCreate */
dbgcIoProvUdpCreate,
/** pfnDestroy */
dbgcIoProvUdpDestroy,
/** pfnWaitForConnect */
dbgcIoProvUdpWaitForConnect,
/** pfnWaitInterrupt */
dbgcIoProvUdpWaitInterrupt
};
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