DHCPServerImpl.cpp@ 106901

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1	/* $Id: DHCPServerImpl.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* VirtualBox COM class implementation
4	*/
5
6	/*
7	* Copyright (C) 2006-2024 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_MAIN_DHCPSERVER
33	#include "DHCPServerImpl.h"
34	#include "LoggingNew.h"
35
36	#include <iprt/asm.h>
37	#include <iprt/err.h>
38	#include <iprt/file.h>
39	#include <iprt/net.h>
40	#include <iprt/path.h>
41	#include <iprt/cpp/path.h>
42	#include <iprt/cpp/utils.h>
43	#include <iprt/cpp/xml.h>
44
45	#include <VBox/com/array.h>
46	#include <VBox/settings.h>
47
48	#include "AutoCaller.h"
49	#include "DHCPConfigImpl.h"
50	#include "MachineImpl.h"
51	#include "NetworkServiceRunner.h"
52	#include "VirtualBoxImpl.h"
53
54
55	/*********************************************************************************************************************************
56	* Defined Constants And Macros *
57	*********************************************************************************************************************************/
58	#if defined(RT_OS_WINDOWS) \|\| defined(RT_OS_OS2)
59	# define DHCP_EXECUTABLE_NAME "VBoxNetDHCP.exe"
60	#else
61	# define DHCP_EXECUTABLE_NAME "VBoxNetDHCP"
62	#endif
63
64
65	/**
66	* DHCP server specialization of NetworkServiceRunner.
67	*
68	* Just defines the executable name and adds option constants.
69	*/
70	class DHCPServerRunner : public NetworkServiceRunner
71	{
72	public:
73	DHCPServerRunner() : NetworkServiceRunner(DHCP_EXECUTABLE_NAME)
74	{}
75	virtual ~DHCPServerRunner()
76	{}
77	};
78
79
80	/**
81	* Hidden private data of the DHCPServer class.
82	*/
83	struct DHCPServer::Data
84	{
85	Data()
86	: pVirtualBox(NULL)
87	, strName()
88	, enabled(FALSE)
89	, uIndividualMACAddressVersion(1)
90	{
91	}
92
93	/** weak VirtualBox parent */
94	VirtualBox * const pVirtualBox;
95	/** The DHCP server name (network). */
96	Utf8Str const strName;
97
98	Utf8Str IPAddress;
99	Utf8Str lowerIP;
100	Utf8Str upperIP;
101
102	BOOL enabled;
103	DHCPServerRunner dhcp;
104
105	com::Utf8Str strLeasesFilename;
106	com::Utf8Str strConfigFilename;
107	com::Utf8Str strLogFilename;
108
109	com::Utf8Str trunkName;
110	com::Utf8Str trunkType;
111
112	/** Global configuration. */
113	ComObjPtr<DHCPGlobalConfig> globalConfig;
114
115	/** Group configuration indexed by name. */
116	std::map<com::Utf8Str, ComObjPtr<DHCPGroupConfig> > groupConfigs;
117	/** Iterator for groupConfigs. */
118	typedef std::map<com::Utf8Str, ComObjPtr<DHCPGroupConfig> >::iterator GroupConfigIterator;
119
120	/** Individual (host) configuration indexed by MAC address or VM UUID. */
121	std::map<com::Utf8Str, ComObjPtr<DHCPIndividualConfig> > individualConfigs;
122	/** Iterator for individualConfigs. */
123	typedef std::map<com::Utf8Str, ComObjPtr<DHCPIndividualConfig> >::iterator IndividualConfigIterator;
124
125	/** Part of a lock-avoidance hack to resolve the VM ID + slot into MAC
126	* addresses before writing out the Dhcpd configuration file. */
127	uint32_t uIndividualMACAddressVersion;
128	};
129
130
131	// constructor / destructor
132	/////////////////////////////////////////////////////////////////////////////
133
134
135	DHCPServer::DHCPServer()
136	: m(NULL)
137	{
138	m = new DHCPServer::Data();
139	}
140
141
142	DHCPServer::~DHCPServer()
143	{
144	if (m)
145	{
146	delete m;
147	m = NULL;
148	}
149	}
150
151
152	HRESULT DHCPServer::FinalConstruct()
153	{
154	return BaseFinalConstruct();
155	}
156
157
158	void DHCPServer::FinalRelease()
159	{
160	uninit();
161	BaseFinalRelease();
162	}
163
164
165	void DHCPServer::uninit()
166	{
167	/* Enclose the state transition Ready->InUninit->NotReady */
168	AutoUninitSpan autoUninitSpan(this);
169	if (autoUninitSpan.uninitDone())
170	return;
171
172	if (m->dhcp.isRunning())
173	stop();
174
175	unconst(m->pVirtualBox) = NULL;
176	}
177
178
179	HRESULT DHCPServer::init(VirtualBox *aVirtualBox, const Utf8Str &aName)
180	{
181	AssertReturn(!aName.isEmpty(), E_INVALIDARG);
182
183	AutoInitSpan autoInitSpan(this);
184	AssertReturn(autoInitSpan.isOk(), E_FAIL);
185
186	/* share VirtualBox weakly (parent remains NULL so far) */
187	unconst(m->pVirtualBox) = aVirtualBox;
188
189	unconst(m->strName) = aName;
190	m->IPAddress = "0.0.0.0";
191	m->lowerIP = "0.0.0.0";
192	m->upperIP = "0.0.0.0";
193	m->enabled = FALSE;
194
195	/* Global configuration: */
196	HRESULT hrc = m->globalConfig.createObject();
197	if (SUCCEEDED(hrc))
198	hrc = m->globalConfig->initWithDefaults(aVirtualBox, this);
199
200	Assert(m->groupConfigs.size() == 0);
201	Assert(m->individualConfigs.size() == 0);
202
203	/* Confirm a successful initialization or not: */
204	if (SUCCEEDED(hrc))
205	autoInitSpan.setSucceeded();
206	else
207	autoInitSpan.setFailed(hrc);
208	return hrc;
209	}
210
211
212	HRESULT DHCPServer::init(VirtualBox *aVirtualBox, const settings::DHCPServer &rData)
213	{
214	/* Enclose the state transition NotReady->InInit->Ready */
215	AutoInitSpan autoInitSpan(this);
216	AssertReturn(autoInitSpan.isOk(), E_FAIL);
217
218	/* share VirtualBox weakly (parent remains NULL so far) */
219	unconst(m->pVirtualBox) = aVirtualBox;
220
221	unconst(m->strName) = rData.strNetworkName;
222	m->IPAddress = rData.strIPAddress;
223	m->enabled = rData.fEnabled;
224	m->lowerIP = rData.strIPLower;
225	m->upperIP = rData.strIPUpper;
226
227	/*
228	* Global configuration:
229	*/
230	HRESULT hrc = m->globalConfig.createObject();
231	if (SUCCEEDED(hrc))
232	hrc = m->globalConfig->initWithSettings(aVirtualBox, this, rData.globalConfig);
233
234	/*
235	* Group configurations:
236	*/
237	Assert(m->groupConfigs.size() == 0);
238	for (settings::DHCPGroupConfigVec::const_iterator it = rData.vecGroupConfigs.begin();
239	it != rData.vecGroupConfigs.end() && SUCCEEDED(hrc); ++it)
240	{
241	ComObjPtr<DHCPGroupConfig> ptrGroupConfig;
242	hrc = ptrGroupConfig.createObject();
243	if (SUCCEEDED(hrc))
244	hrc = ptrGroupConfig->initWithSettings(aVirtualBox, this, *it);
245	if (SUCCEEDED(hrc))
246	{
247	try
248	{
249	m->groupConfigs[it->strName] = ptrGroupConfig;
250	}
251	catch (std::bad_alloc &)
252	{
253	return E_OUTOFMEMORY;
254	}
255	}
256	}
257
258	/*
259	* Individual configuration:
260	*/
261	Assert(m->individualConfigs.size() == 0);
262	for (settings::DHCPIndividualConfigMap::const_iterator it = rData.mapIndividualConfigs.begin();
263	it != rData.mapIndividualConfigs.end() && SUCCEEDED(hrc); ++it)
264	{
265	ComObjPtr<DHCPIndividualConfig> ptrIndiCfg;
266	com::Utf8Str strKey;
267	if (it->second.strVMName.isEmpty())
268	{
269	RTMAC MACAddress;
270	int vrc = RTNetStrToMacAddr(it->second.strMACAddress.c_str(), &MACAddress);
271	if (RT_FAILURE(vrc))
272	{
273	LogRel(("Ignoring invalid MAC address for individual DHCP config: '%s' - %Rrc\n", it->second.strMACAddress.c_str(), vrc));
274	continue;
275	}
276
277	vrc = strKey.printfNoThrow("%RTmac", &MACAddress);
278	AssertRCReturn(vrc, E_OUTOFMEMORY);
279
280	hrc = ptrIndiCfg.createObject();
281	if (SUCCEEDED(hrc))
282	hrc = ptrIndiCfg->initWithSettingsAndMACAddress(aVirtualBox, this, it->second, &MACAddress);
283	}
284	else
285	{
286	/* This ASSUMES that we're being called after the machines have been
287	loaded so we can resolve VM names into UUID for old settings. */
288	com::Guid idMachine;
289	hrc = i_vmNameToIdAndValidateSlot(it->second.strVMName, it->second.uSlot, idMachine);
290	if (SUCCEEDED(hrc))
291	{
292	int vrc = strKey.printfNoThrow("%RTuuid/%u", idMachine.raw(), it->second.uSlot);
293	AssertRCReturn(vrc, E_OUTOFMEMORY);
294
295	hrc = ptrIndiCfg.createObject();
296	if (SUCCEEDED(hrc))
297	hrc = ptrIndiCfg->initWithSettingsAndMachineIdAndSlot(aVirtualBox, this, it->second,
298	idMachine, it->second.uSlot,
299	m->uIndividualMACAddressVersion - UINT32_MAX / 4);
300	}
301	}
302	if (SUCCEEDED(hrc))
303	{
304	try
305	{
306	m->individualConfigs[strKey] = ptrIndiCfg;
307	}
308	catch (std::bad_alloc &)
309	{
310	return E_OUTOFMEMORY;
311	}
312	}
313	}
314
315	/* Confirm a successful initialization or not: */
316	if (SUCCEEDED(hrc))
317	autoInitSpan.setSucceeded();
318	else
319	autoInitSpan.setFailed(hrc);
320	return hrc;
321	}
322
323
324	/**
325	* Called by VirtualBox to save our settings.
326	*/
327	HRESULT DHCPServer::i_saveSettings(settings::DHCPServer &rData)
328	{
329	AutoCaller autoCaller(this);
330	if (FAILED(autoCaller.hrc())) return autoCaller.hrc();
331
332	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
333
334	rData.strNetworkName = m->strName;
335	rData.strIPAddress = m->IPAddress;
336	rData.fEnabled = m->enabled != FALSE;
337	rData.strIPLower = m->lowerIP;
338	rData.strIPUpper = m->upperIP;
339
340	/* Global configuration: */
341	HRESULT hrc = m->globalConfig->i_saveSettings(rData.globalConfig);
342
343	/* Group configuration: */
344	size_t const cGroupConfigs = m->groupConfigs.size();
345	try
346	{
347	rData.vecGroupConfigs.resize(cGroupConfigs);
348	}
349	catch (std::bad_alloc &)
350	{
351	return E_OUTOFMEMORY;
352	}
353	size_t i = 0;
354	for (Data::GroupConfigIterator it = m->groupConfigs.begin(); it != m->groupConfigs.end() && SUCCEEDED(hrc); ++it, i++)
355	{
356	try
357	{
358	rData.vecGroupConfigs[i] = settings::DHCPGroupConfig();
359	}
360	catch (std::bad_alloc &)
361	{
362	return E_OUTOFMEMORY;
363	}
364	hrc = it->second->i_saveSettings(rData.vecGroupConfigs[i]);
365	}
366
367	/* Individual configuration: */
368	for (Data::IndividualConfigIterator it = m->individualConfigs.begin();
369	it != m->individualConfigs.end() && SUCCEEDED(hrc); ++it)
370	{
371	try
372	{
373	rData.mapIndividualConfigs[it->first] = settings::DHCPIndividualConfig();
374	}
375	catch (std::bad_alloc &)
376	{
377	return E_OUTOFMEMORY;
378	}
379	hrc = it->second->i_saveSettings(rData.mapIndividualConfigs[it->first]);
380	}
381
382	return hrc;
383	}
384
385
386	HRESULT DHCPServer::i_removeConfig(DHCPConfig *pConfig, DHCPConfigScope_T enmScope)
387	{
388	{
389	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
390
391	bool fFound = false;
392	switch (enmScope)
393	{
394	case DHCPConfigScope_Group:
395	{
396	for (Data::GroupConfigIterator it = m->groupConfigs.begin(); it != m->groupConfigs.end();)
397	{
398	DHCPConfig *pCurConfig = it->second;
399	if (pCurConfig == pConfig)
400	{
401	m->groupConfigs.erase(it++); /* Post increment returns copy of original that is then erased. */
402	fFound = true;
403	}
404	else
405	++it;
406	}
407	break;
408	}
409
410	case DHCPConfigScope_MAC:
411	case DHCPConfigScope_MachineNIC:
412	{
413	for (Data::IndividualConfigIterator it = m->individualConfigs.begin(); it != m->individualConfigs.end();)
414	{
415	DHCPConfig *pCurConfig = it->second;
416	if (pCurConfig == pConfig)
417	{
418	m->individualConfigs.erase(it++); /* Post increment returns copy of original that is then erased. */
419	fFound = true;
420	}
421	else
422	++it;
423	}
424	break;
425	}
426
427	default:
428	AssertFailedReturn(E_FAIL);
429	}
430
431	/* Don't complain if already removed, right? */
432	if (!fFound)
433	return S_OK;
434	}
435
436	return i_doSaveSettings();
437	}
438
439
440	/**
441	* Internal worker that saves the settings after a modification was made.
442	*
443	* @returns COM status code.
444	*
445	* @note Caller must not hold any locks!
446	*/
447	HRESULT DHCPServer::i_doSaveSettings()
448	{
449	// save the global settings; for that we should hold only the VirtualBox lock
450	AutoWriteLock vboxLock(m->pVirtualBox COMMA_LOCKVAL_SRC_POS);
451	return m->pVirtualBox->i_saveSettings();
452	}
453
454
455	HRESULT DHCPServer::getNetworkName(com::Utf8Str &aName)
456	{
457	/* The name is const, so no need to for locking. */
458	return aName.assignEx(m->strName);
459	}
460
461
462	HRESULT DHCPServer::getEnabled(BOOL *aEnabled)
463	{
464	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
465	*aEnabled = m->enabled;
466	return S_OK;
467	}
468
469
470	HRESULT DHCPServer::setEnabled(BOOL aEnabled)
471	{
472	{
473	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
474	m->enabled = aEnabled;
475	}
476	return i_doSaveSettings();
477	}
478
479
480	HRESULT DHCPServer::getIPAddress(com::Utf8Str &aIPAddress)
481	{
482	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
483	return aIPAddress.assignEx(m->IPAddress);
484	}
485
486
487	HRESULT DHCPServer::getNetworkMask(com::Utf8Str &aNetworkMask)
488	{
489	return m->globalConfig->i_getNetworkMask(aNetworkMask);
490	}
491
492
493	HRESULT DHCPServer::getLowerIP(com::Utf8Str &aIPAddress)
494	{
495	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
496	return aIPAddress.assignEx(m->lowerIP);
497	}
498
499
500	HRESULT DHCPServer::getUpperIP(com::Utf8Str &aIPAddress)
501	{
502	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
503	return aIPAddress.assignEx(m->upperIP);
504	}
505
506
507	HRESULT DHCPServer::setConfiguration(const com::Utf8Str &aIPAddress,
508	const com::Utf8Str &aNetworkMask,
509	const com::Utf8Str &aLowerIP,
510	const com::Utf8Str &aUpperIP)
511	{
512	RTNETADDRIPV4 IPAddress, NetworkMask, LowerIP, UpperIP;
513
514	int vrc = RTNetStrToIPv4Addr(aIPAddress.c_str(), &IPAddress);
515	if (RT_FAILURE(vrc))
516	return setErrorBoth(E_INVALIDARG, vrc, tr("Invalid server address: %s"), aIPAddress.c_str());
517
518	vrc = RTNetStrToIPv4Addr(aNetworkMask.c_str(), &NetworkMask);
519	if (RT_FAILURE(vrc))
520	return setErrorBoth(E_INVALIDARG, vrc, tr("Invalid netmask: %s"), aNetworkMask.c_str());
521
522	vrc = RTNetStrToIPv4Addr(aLowerIP.c_str(), &LowerIP);
523	if (RT_FAILURE(vrc))
524	return setErrorBoth(E_INVALIDARG, vrc, tr("Invalid range lower address: %s"), aLowerIP.c_str());
525
526	vrc = RTNetStrToIPv4Addr(aUpperIP.c_str(), &UpperIP);
527	if (RT_FAILURE(vrc))
528	return setErrorBoth(E_INVALIDARG, vrc, tr("Invalid range upper address: %s"), aUpperIP.c_str());
529
530	/*
531	* Insist on continuous mask. May be also accept prefix length
532	* here or address/prefix for aIPAddress?
533	*/
534	vrc = RTNetMaskToPrefixIPv4(&NetworkMask, NULL);
535	if (RT_FAILURE(vrc))
536	return setErrorBoth(E_INVALIDARG, vrc, tr("Invalid netmask: %s"), aNetworkMask.c_str());
537
538	/* It's more convenient to convert to host order once: */
539	IPAddress.u = RT_N2H_U32(IPAddress.u);
540	NetworkMask.u = RT_N2H_U32(NetworkMask.u);
541	LowerIP.u = RT_N2H_U32(LowerIP.u);
542	UpperIP.u = RT_N2H_U32(UpperIP.u);
543
544	/*
545	* Addresses must be unicast and from the same network
546	*/
547	if ( (IPAddress.u & UINT32_C(0xe0000000)) == UINT32_C(0xe0000000)
548	\|\| (IPAddress.u & ~NetworkMask.u) == 0
549	\|\| ((IPAddress.u & ~NetworkMask.u) \| NetworkMask.u) == UINT32_C(0xffffffff))
550	return setError(E_INVALIDARG, tr("Invalid server address: %s (mask %s)"), aIPAddress.c_str(), aNetworkMask.c_str());
551
552	if ( (LowerIP.u & UINT32_C(0xe0000000)) == UINT32_C(0xe0000000)
553	\|\| (LowerIP.u & NetworkMask.u) != (IPAddress.u &NetworkMask.u)
554	\|\| (LowerIP.u & ~NetworkMask.u) == 0
555	\|\| ((LowerIP.u & ~NetworkMask.u) \| NetworkMask.u) == UINT32_C(0xffffffff))
556	return setError(E_INVALIDARG, tr("Invalid range lower address: %s (mask %s)"), aLowerIP.c_str(), aNetworkMask.c_str());
557
558	if ( (UpperIP.u & UINT32_C(0xe0000000)) == UINT32_C(0xe0000000)
559	\|\| (UpperIP.u & NetworkMask.u) != (IPAddress.u &NetworkMask.u)
560	\|\| (UpperIP.u & ~NetworkMask.u) == 0
561	\|\| ((UpperIP.u & ~NetworkMask.u) \| NetworkMask.u) == UINT32_C(0xffffffff))
562	return setError(E_INVALIDARG, tr("Invalid range upper address"), aUpperIP.c_str(), aNetworkMask.c_str());
563
564	/* The range should be valid. (It's okay to overlap the server IP.) */
565	if (LowerIP.u > UpperIP.u)
566	return setError(E_INVALIDARG, tr("Lower bound must be less or eqaul than the upper: %s vs %s"),
567	aLowerIP.c_str(), aUpperIP.c_str());
568
569	/*
570	* Input is valid, effect the changes.
571	*/
572	HRESULT hrc;
573	{
574	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
575	m->IPAddress = aIPAddress;
576	m->lowerIP = aLowerIP;
577	m->upperIP = aUpperIP;
578	hrc = m->globalConfig->i_setNetworkMask(aNetworkMask);
579	}
580	if (SUCCEEDED(hrc))
581	hrc = i_doSaveSettings();
582	return hrc;
583	}
584
585
586	/**
587	* Validates the VM name and slot, returning the machine ID.
588	*
589	* If a machine ID is given instead of a name, we won't check whether it
590	* actually exists...
591	*
592	* @returns COM status code.
593	* @param aVmName The VM name or UUID.
594	* @param a_uSlot The slot.
595	* @param idMachine Where to return the VM UUID.
596	*/
597	HRESULT DHCPServer::i_vmNameToIdAndValidateSlot(const com::Utf8Str &aVmName, ULONG a_uSlot, com::Guid &idMachine)
598	{
599	if (a_uSlot <= 32)
600	{
601	/* Is it a UUID? */
602	idMachine = aVmName;
603	if (idMachine.isValid() && !idMachine.isZero())
604	return S_OK;
605
606	/* No, find the VM and get it's UUID. */
607	ComObjPtr<Machine> ptrMachine;
608	HRESULT hrc = m->pVirtualBox->i_findMachineByName(aVmName, true /aSetError/, &ptrMachine);
609	if (SUCCEEDED(hrc))
610	idMachine = ptrMachine->i_getId();
611	return hrc;
612	}
613	return setError(E_INVALIDARG, tr("NIC slot number (%d) is out of range (0..32)"), a_uSlot);
614	}
615
616
617	/**
618	* Translates a VM name/id and slot to an individual configuration object.
619	*
620	* @returns COM status code.
621	* @param a_strVmName The VM name or ID.
622	* @param a_uSlot The NIC slot.
623	* @param a_fCreateIfNeeded Whether to create a new entry if not found.
624	* @param a_rPtrConfig Where to return the config object. It's
625	* implicitly referenced, so we don't be returning
626	* with any locks held.
627	*
628	* @note Caller must not be holding any locks!
629	*/
630	HRESULT DHCPServer::i_vmNameAndSlotToConfig(const com::Utf8Str &a_strVmName, ULONG a_uSlot, bool a_fCreateIfNeeded,
631	ComObjPtr<DHCPIndividualConfig> &a_rPtrConfig)
632	{
633	/*
634	* Validate the slot and normalize the name into a UUID.
635	*/
636	com::Guid idMachine;
637	HRESULT hrc = i_vmNameToIdAndValidateSlot(a_strVmName, a_uSlot, idMachine);
638	if (SUCCEEDED(hrc))
639	{
640	Utf8Str strKey;
641	int vrc = strKey.printfNoThrow("%RTuuid/%u", idMachine.raw(), a_uSlot);
642	if (RT_SUCCESS(vrc))
643	{
644	/*
645	* Look it up.
646	*/
647	{
648	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
649	Data::IndividualConfigIterator it = m->individualConfigs.find(strKey);
650	if (it != m->individualConfigs.end())
651	{
652	a_rPtrConfig = it->second;
653	return S_OK;
654	}
655	}
656	if (a_fCreateIfNeeded)
657	{
658	/*
659	* Create a new slot.
660	*/
661	/* Instantiate the object: */
662	hrc = a_rPtrConfig.createObject();
663	if (SUCCEEDED(hrc))
664	hrc = a_rPtrConfig->initWithMachineIdAndSlot(m->pVirtualBox, this, idMachine, a_uSlot,
665	m->uIndividualMACAddressVersion - UINT32_MAX / 4);
666	if (SUCCEEDED(hrc))
667	{
668	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
669
670	/* Check for creation race: */
671	Data::IndividualConfigIterator it = m->individualConfigs.find(strKey);
672	if (it != m->individualConfigs.end())
673	{
674	a_rPtrConfig.setNull();
675	a_rPtrConfig = it->second;
676	return S_OK;
677	}
678
679	/* Add it. */
680	try
681	{
682	m->individualConfigs[strKey] = a_rPtrConfig;
683
684	/* Save settings. */
685	alock.release();
686	return i_doSaveSettings();
687	}
688	catch (std::bad_alloc &)
689	{
690	hrc = E_OUTOFMEMORY;
691	}
692	a_rPtrConfig.setNull();
693	}
694	}
695	else
696	hrc = VBOX_E_OBJECT_NOT_FOUND;
697	}
698	else
699	hrc = E_OUTOFMEMORY;
700	}
701	return hrc;
702	}
703
704
705	HRESULT DHCPServer::getEventSource(ComPtr<IEventSource> &aEventSource)
706	{
707	NOREF(aEventSource);
708	ReturnComNotImplemented();
709	}
710
711
712	HRESULT DHCPServer::getGlobalConfig(ComPtr<IDHCPGlobalConfig> &aGlobalConfig)
713	{
714	/* The global configuration is immutable, so no need to lock anything here. */
715	return m->globalConfig.queryInterfaceTo(aGlobalConfig.asOutParam());
716	}
717
718
719	HRESULT DHCPServer::getGroupConfigs(std::vector<ComPtr<IDHCPGroupConfig> > &aGroupConfigs)
720	{
721	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
722
723	size_t const cGroupConfigs = m->groupConfigs.size();
724	try
725	{
726	aGroupConfigs.resize(cGroupConfigs);
727	}
728	catch (std::bad_alloc &)
729	{
730	return E_OUTOFMEMORY;
731	}
732
733	size_t i = 0;
734	for (Data::GroupConfigIterator it = m->groupConfigs.begin(); it != m->groupConfigs.end(); ++it, i++)
735	{
736	Assert(i < cGroupConfigs);
737	HRESULT hrc = it->second.queryInterfaceTo(aGroupConfigs[i].asOutParam());
738	if (FAILED(hrc))
739	return hrc;
740	}
741
742	return S_OK;
743	}
744
745
746	HRESULT DHCPServer::getIndividualConfigs(std::vector<ComPtr<IDHCPIndividualConfig> > &aIndividualConfigs)
747	{
748	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
749
750	size_t const cIndividualConfigs = m->individualConfigs.size();
751	try
752	{
753	aIndividualConfigs.resize(cIndividualConfigs);
754	}
755	catch (std::bad_alloc &)
756	{
757	return E_OUTOFMEMORY;
758	}
759
760	size_t i = 0;
761	for (Data::IndividualConfigIterator it = m->individualConfigs.begin(); it != m->individualConfigs.end(); ++it, i++)
762	{
763	Assert(i < cIndividualConfigs);
764	HRESULT hrc = it->second.queryInterfaceTo(aIndividualConfigs[i].asOutParam());
765	if (FAILED(hrc))
766	return hrc;
767	}
768
769	return S_OK;
770	}
771
772
773	HRESULT DHCPServer::restart()
774	{
775	if (!m->dhcp.isRunning())
776	return setErrorBoth(E_FAIL, VERR_PROCESS_NOT_FOUND, tr("not running"));
777
778	/*
779	* Disabled servers will be brought down, but won't be restarted.
780	* (see DHCPServer::start)
781	*/
782	HRESULT hrc = stop();
783	if (SUCCEEDED(hrc))
784	hrc = start(m->trunkName, m->trunkType);
785	return hrc;
786	}
787
788
789	/**
790	* @throws std::bad_alloc
791	*/
792	HRESULT DHCPServer::i_writeDhcpdConfig(const char *pszFilename, uint32_t uMACAddressVersion) RT_NOEXCEPT
793	{
794	/*
795	* Produce the DHCP server configuration.
796	*/
797	xml::Document doc;
798	try
799	{
800	xml::ElementNode *pElmRoot = doc.createRootElement("DHCPServer");
801	pElmRoot->setAttribute("networkName", m->strName);
802	if (m->trunkName.isNotEmpty())
803	pElmRoot->setAttribute("trunkName", m->trunkName);
804	pElmRoot->setAttribute("trunkType", m->trunkType);
805	pElmRoot->setAttribute("IPAddress", m->IPAddress);
806	pElmRoot->setAttribute("lowerIP", m->lowerIP);
807	pElmRoot->setAttribute("upperIP", m->upperIP);
808	pElmRoot->setAttribute("leasesFilename", m->strLeasesFilename);
809	Utf8Str strNetworkMask;
810	HRESULT hrc = m->globalConfig->i_getNetworkMask(strNetworkMask);
811	if (FAILED(hrc))
812	return hrc;
813	pElmRoot->setAttribute("networkMask", strNetworkMask);
814
815	/*
816	* Process global options
817	*/
818	m->globalConfig->i_writeDhcpdConfig(pElmRoot->createChild("Options"));
819
820	/*
821	* Groups.
822	*/
823	for (Data::GroupConfigIterator it = m->groupConfigs.begin(); it != m->groupConfigs.end(); ++it)
824	it->second->i_writeDhcpdConfig(pElmRoot->createChild("Group"));
825
826	/*
827	* Individual NIC configurations.
828	*/
829	for (Data::IndividualConfigIterator it = m->individualConfigs.begin(); it != m->individualConfigs.end(); ++it)
830	if (it->second->i_isMACAddressResolved(uMACAddressVersion))
831	it->second->i_writeDhcpdConfig(pElmRoot->createChild("Config"));
832	else
833	LogRelFunc(("Skipping %RTuuid/%u, no MAC address.\n", it->second->i_getMachineId().raw(), it->second->i_getSlot()));
834	}
835	catch (std::bad_alloc &)
836	{
837	return E_OUTOFMEMORY;
838	}
839
840	/*
841	* Write out the document.
842	*/
843	try
844	{
845	xml::XmlFileWriter writer(doc);
846	writer.write(pszFilename, false);
847	}
848	catch (...)
849	{
850	return E_FAIL;
851	}
852
853	return S_OK;
854	}
855
856
857	HRESULT DHCPServer::start(const com::Utf8Str &aTrunkName, const com::Utf8Str &aTrunkType)
858	{
859	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
860
861	/* Silently ignore attempts to run disabled servers. */
862	if (!m->enabled)
863	return S_OK;
864
865	/*
866	* Resolve the MAC addresses. This requires us to leave the lock.
867	*/
868	uint32_t uMACAddressVersion = m->uIndividualMACAddressVersion;
869	if (m->individualConfigs.size() > 0)
870	{
871	m->uIndividualMACAddressVersion = uMACAddressVersion + 1;
872
873	/* Retain pointers to all the individual configuration objects so we
874	can safely access these after releaseing the lock: */
875	std::vector< ComObjPtr<DHCPIndividualConfig> > vecIndividualConfigs;
876	try
877	{
878	vecIndividualConfigs.resize(m->individualConfigs.size());
879	}
880	catch (std::bad_alloc &)
881	{
882	return E_OUTOFMEMORY;
883	}
884	size_t i = 0;
885	for (Data::IndividualConfigIterator it = m->individualConfigs.begin(); it != m->individualConfigs.end(); ++it, i++)
886	vecIndividualConfigs[i] = it->second;
887
888	/* Drop the lock and resolve the MAC addresses: */
889	alock.release();
890
891	i = vecIndividualConfigs.size();
892	while (i-- > 0)
893	vecIndividualConfigs[i]->i_resolveMACAddress(uMACAddressVersion);
894
895	/* Reacquire the lock */
896	alock.acquire();
897	if (!m->enabled)
898	return S_OK;
899	}
900
901	/*
902	* Refuse to start a 2nd DHCP server instance for the same network.
903	*/
904	if (m->dhcp.isRunning())
905	return setErrorBoth(VBOX_E_OBJECT_IN_USE, VERR_PROCESS_RUNNING,
906	tr("Cannot start DHCP server because it is already running (pid %RTproc)"), m->dhcp.getPid());
907
908	/*
909	* Copy the startup parameters.
910	*/
911	m->trunkName = aTrunkName;
912	m->trunkType = aTrunkType;
913	HRESULT hrc = i_calcLeasesConfigAndLogFilenames(m->strName);
914	if (SUCCEEDED(hrc))
915	{
916	/*
917	* Create configuration file path and write out the configuration.
918	*/
919	hrc = i_writeDhcpdConfig(m->strConfigFilename.c_str(), uMACAddressVersion);
920	if (SUCCEEDED(hrc))
921	{
922	/*
923	* Setup the arguments and start the DHCP server.
924	*/
925	m->dhcp.resetArguments();
926	int vrc = m->dhcp.addArgPair("--comment", m->strName.c_str());
927	if (RT_SUCCESS(vrc))
928	vrc = m->dhcp.addArgPair("--config", m->strConfigFilename.c_str());
929	if (RT_SUCCESS(vrc))
930	vrc = m->dhcp.addArgPair("--log", m->strLogFilename.c_str());
931	/** @todo Add --log-flags, --log-group-settings, and --log-destinations with
932	* associated IDHCPServer attributes. (Not doing it now because that'll
933	* exhaust all reserved attribute slot in 6.0.) */
934	if (RT_SUCCESS(vrc))
935	{
936	/* Start it: */
937	vrc = m->dhcp.start(true /aKillProcessOnStop/);
938	if (RT_FAILURE(vrc))
939	hrc = setErrorVrc(vrc, tr("Failed to start DHCP server for '%s': %Rrc"), m->strName.c_str(), vrc);
940	}
941	else
942	hrc = setErrorVrc(vrc, tr("Failed to assemble the command line for DHCP server '%s': %Rrc"),
943	m->strName.c_str(), vrc);
944	}
945	}
946	return hrc;
947	}
948
949
950	HRESULT DHCPServer::stop(void)
951	{
952	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
953
954	int vrc = m->dhcp.stop();
955	if (RT_SUCCESS(vrc))
956	return S_OK;
957	return setErrorVrc(vrc);
958	}
959
960
961	HRESULT DHCPServer::findLeaseByMAC(const com::Utf8Str &aMac, LONG aType,
962	com::Utf8Str &aAddress, com::Utf8Str &aState, LONG64 aIssued, LONG64 aExpire)
963	{
964	/* Reset output before we start */
965	*aIssued = 0;
966	*aExpire = 0;
967	aAddress.setNull();
968	aState.setNull();
969
970	/*
971	* Convert and check input.
972	*/
973	RTMAC MacAddress;
974	int vrc = RTStrConvertHexBytes(aMac.c_str(), &MacAddress, sizeof(MacAddress), RTSTRCONVERTHEXBYTES_F_SEP_COLON);
975	if (vrc != VINF_SUCCESS)
976	return setErrorBoth(E_INVALIDARG, vrc, tr("Invalid MAC address '%s': %Rrc"), aMac.c_str(), vrc);
977	if (aType != 0)
978	return setError(E_INVALIDARG, tr("flags must be zero (not %#x)"), aType);
979
980	/*
981	* Make sure we've got a lease filename to work with.
982	*/
983	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
984	if (m->strLeasesFilename.isEmpty())
985	{
986	HRESULT hrc = i_calcLeasesConfigAndLogFilenames(m->strName);
987	if (FAILED(hrc))
988	return hrc;
989	}
990
991	/*
992	* Try at least twice to read the lease database, more if busy.
993	*/
994	uint64_t const nsStart = RTTimeNanoTS();
995	for (uint32_t uReadAttempt = 0; ; uReadAttempt++)
996	{
997	/*
998	* Try read the file.
999	*/
1000	xml::Document doc;
1001	try
1002	{
1003	xml::XmlFileParser parser;
1004	parser.read(m->strLeasesFilename.c_str(), doc);
1005	}
1006	catch (const xml::EIPRTFailure &e)
1007	{
1008	vrc = e.getStatus();
1009	LogThisFunc(("caught xml::EIPRTFailure: rc=%Rrc (attempt %u, msg=%s)\n", vrc, uReadAttempt, e.what()));
1010	if ( ( vrc == VERR_FILE_NOT_FOUND
1011	\|\| vrc == VERR_OPEN_FAILED
1012	\|\| vrc == VERR_ACCESS_DENIED
1013	\|\| vrc == VERR_SHARING_VIOLATION
1014	\|\| vrc == VERR_READ_ERROR /?/)
1015	&& ( uReadAttempt == 0
1016	\|\| ( uReadAttempt < 64
1017	&& RTTimeNanoTS() - nsStart < RT_NS_1SEC / 4)) )
1018	{
1019	alock.release();
1020
1021	if (uReadAttempt > 0)
1022	RTThreadYield();
1023	RTThreadSleep(8/ms/);
1024
1025	alock.acquire();
1026	LogThisFunc(("Retrying...\n"));
1027	continue;
1028	}
1029	return setErrorBoth(VBOX_E_FILE_ERROR, vrc, tr("Reading '%s' failed: %Rrc - %s"),
1030	m->strLeasesFilename.c_str(), vrc, e.what());
1031	}
1032	catch (const RTCError &e)
1033	{
1034	if (e.what())
1035	return setError(VBOX_E_FILE_ERROR, tr("Reading '%s' failed: %s"), m->strLeasesFilename.c_str(), e.what());
1036	return setError(VBOX_E_FILE_ERROR, tr("Reading '%s' failed: RTCError"), m->strLeasesFilename.c_str());
1037	}
1038	catch (std::bad_alloc &)
1039	{
1040	return E_OUTOFMEMORY;
1041	}
1042	catch (...)
1043	{
1044	AssertFailed();
1045	return setError(VBOX_E_FILE_ERROR, tr("Reading '%s' failed: Unexpected exception"), m->strLeasesFilename.c_str());
1046	}
1047
1048	/*
1049	* Look for that mac address.
1050	*/
1051	xml::ElementNode *pElmRoot = doc.getRootElement();
1052	if (pElmRoot && pElmRoot->nameEquals("Leases"))
1053	{
1054	xml::NodesLoop it(*pElmRoot);
1055	const xml::ElementNode *pElmLease;
1056	while ((pElmLease = it.forAllNodes()) != NULL)
1057	if (pElmLease->nameEquals("Lease"))
1058	{
1059	const char *pszCurMacAddress = pElmLease->findAttributeValue("mac");
1060	RTMAC CurMacAddress;
1061	if ( pszCurMacAddress
1062	&& RT_SUCCESS(RTNetStrToMacAddr(pszCurMacAddress, &CurMacAddress))
1063	&& memcmp(&CurMacAddress, &MacAddress, sizeof(MacAddress)) == 0)
1064	{
1065	/*
1066	* Found it!
1067	*/
1068	xml::ElementNode const *pElmTime = pElmLease->findChildElement("Time");
1069	int64_t secIssued = 0;
1070	uint32_t cSecsToLive = 0;
1071	if (pElmTime)
1072	{
1073	pElmTime->getAttributeValue("issued", &secIssued);
1074	pElmTime->getAttributeValue("expiration", &cSecsToLive);
1075	*aIssued = secIssued;
1076	*aExpire = secIssued + cSecsToLive;
1077	}
1078	try
1079	{
1080	aAddress = pElmLease->findChildElementAttributeValue("Address", "value");
1081	aState = pElmLease->findAttributeValue("state");
1082	}
1083	catch (std::bad_alloc &)
1084	{
1085	return E_OUTOFMEMORY;
1086	}
1087
1088	/* Check if the lease has expired in the mean time. */
1089	HRESULT hrc = S_OK;
1090	RTTIMESPEC Now;
1091	if ( (aState.equals("acked") \|\| aState.equals("offered") \|\| aState.isEmpty())
1092	&& secIssued + cSecsToLive < RTTimeSpecGetSeconds(RTTimeNow(&Now)))
1093	hrc = RT_SUCCESS(aState.assignNoThrow("expired")) ? S_OK : E_OUTOFMEMORY;
1094	return hrc;
1095	}
1096	}
1097	}
1098	break;
1099	}
1100
1101	return setError(VBOX_E_OBJECT_NOT_FOUND, tr("Could not find a lease for %RTmac"), &MacAddress);
1102	}
1103
1104
1105	HRESULT DHCPServer::getConfig(DHCPConfigScope_T aScope, const com::Utf8Str &aName, ULONG aSlot, BOOL aMayAdd,
1106	ComPtr<IDHCPConfig> &aConfig)
1107	{
1108	if (aSlot != 0 && aScope != DHCPConfigScope_MachineNIC)
1109	return setError(E_INVALIDARG, tr("The 'slot' argument must be zero for all but the MachineNIC scope!"));
1110
1111	switch (aScope)
1112	{
1113	case DHCPConfigScope_Global:
1114	if (aName.isNotEmpty())
1115	return setError(E_INVALIDARG, tr("The name must be empty or NULL for the Global scope!"));
1116
1117	/* No locking required here. */
1118	return m->globalConfig.queryInterfaceTo(aConfig.asOutParam());
1119
1120	case DHCPConfigScope_Group:
1121	{
1122	if (aName.isEmpty())
1123	return setError(E_INVALIDARG, tr("A group must have a name!"));
1124	if (aName.length() > _1K)
1125	return setError(E_INVALIDARG, tr("Name too long! %zu bytes", "", aName.length()), aName.length());
1126
1127	/* Look up the group: */
1128	{
1129	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
1130	Data::GroupConfigIterator it = m->groupConfigs.find(aName);
1131	if (it != m->groupConfigs.end())
1132	return it->second.queryInterfaceTo(aConfig.asOutParam());
1133	}
1134	/* Create a new group if we can. */
1135	if (!aMayAdd)
1136	return setError(VBOX_E_OBJECT_NOT_FOUND, tr("Found no configuration for group %s"), aName.c_str());
1137	ComObjPtr<DHCPGroupConfig> ptrGroupConfig;
1138	HRESULT hrc = ptrGroupConfig.createObject();
1139	if (SUCCEEDED(hrc))
1140	hrc = ptrGroupConfig->initWithDefaults(m->pVirtualBox, this, aName);
1141	if (SUCCEEDED(hrc))
1142	{
1143	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1144
1145	/* Check for insertion race: */
1146	Data::GroupConfigIterator it = m->groupConfigs.find(aName);
1147	if (it != m->groupConfigs.end())
1148	return it->second.queryInterfaceTo(aConfig.asOutParam()); /* creation race*/
1149
1150	/* Try insert it: */
1151	try
1152	{
1153	m->groupConfigs[aName] = ptrGroupConfig;
1154	}
1155	catch (std::bad_alloc &)
1156	{
1157	return E_OUTOFMEMORY;
1158	}
1159	return ptrGroupConfig.queryInterfaceTo(aConfig.asOutParam());
1160	}
1161	return hrc;
1162	}
1163
1164	case DHCPConfigScope_MachineNIC:
1165	{
1166	ComObjPtr<DHCPIndividualConfig> ptrIndividualConfig;
1167	HRESULT hrc = i_vmNameAndSlotToConfig(aName, aSlot, aMayAdd != FALSE, ptrIndividualConfig);
1168	if (SUCCEEDED(hrc))
1169	hrc = ptrIndividualConfig.queryInterfaceTo(aConfig.asOutParam());
1170	return hrc;
1171	}
1172
1173	case DHCPConfigScope_MAC:
1174	{
1175	/* Check and Normalize the MAC address into a key: */
1176	RTMAC MACAddress;
1177	int vrc = RTNetStrToMacAddr(aName.c_str(), &MACAddress);
1178	if (RT_SUCCESS(vrc))
1179	{
1180	Utf8Str strKey;
1181	vrc = strKey.printfNoThrow("%RTmac", &MACAddress);
1182	if (RT_SUCCESS(vrc))
1183	{
1184	/* Look up the MAC address: */
1185	{
1186	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
1187	Data::IndividualConfigIterator it = m->individualConfigs.find(strKey);
1188	if (it != m->individualConfigs.end())
1189	return it->second.queryInterfaceTo(aConfig.asOutParam());
1190	}
1191	if (aMayAdd)
1192	{
1193	/* Create a new individiual configuration: */
1194	ComObjPtr<DHCPIndividualConfig> ptrIndividualConfig;
1195	HRESULT hrc = ptrIndividualConfig.createObject();
1196	if (SUCCEEDED(hrc))
1197	hrc = ptrIndividualConfig->initWithMACAddress(m->pVirtualBox, this, &MACAddress);
1198	if (SUCCEEDED(hrc))
1199	{
1200	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1201
1202	/* Check for insertion race: */
1203	Data::IndividualConfigIterator it = m->individualConfigs.find(strKey);
1204	if (it != m->individualConfigs.end())
1205	return it->second.queryInterfaceTo(aConfig.asOutParam()); /* creation race*/
1206
1207	/* Try insert it: */
1208	try
1209	{
1210	m->individualConfigs[strKey] = ptrIndividualConfig;
1211	}
1212	catch (std::bad_alloc &)
1213	{
1214	return E_OUTOFMEMORY;
1215	}
1216	return ptrIndividualConfig.queryInterfaceTo(aConfig.asOutParam());
1217	}
1218	}
1219	else
1220	return setError(VBOX_E_OBJECT_NOT_FOUND, tr("Found no configuration for MAC address %s"), strKey.c_str());
1221	}
1222	return E_OUTOFMEMORY;
1223	}
1224	return setErrorBoth(E_INVALIDARG, vrc, tr("Invalid MAC address: %s"), aName.c_str());
1225	}
1226
1227	default:
1228	return E_FAIL;
1229	}
1230	}
1231
1232
1233	/**
1234	* Calculates and updates the value of strLeasesFilename given @a aNetwork.
1235	*/
1236	HRESULT DHCPServer::i_calcLeasesConfigAndLogFilenames(const com::Utf8Str &aNetwork) RT_NOEXCEPT
1237	{
1238	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1239
1240	/* The lease file must be the same as we used the last time, so careful when changing this code. */
1241	int vrc = m->strLeasesFilename.assignNoThrow(m->pVirtualBox->i_homeDir());
1242	if (RT_SUCCESS(vrc))
1243	vrc = RTPathAppendCxx(m->strLeasesFilename, aNetwork);
1244	if (RT_SUCCESS(vrc))
1245	{
1246	RTPathPurgeFilename(RTPathFilename(m->strLeasesFilename.mutableRaw()), RTPATH_STR_F_STYLE_HOST);
1247
1248	/* The configuration file: */
1249	vrc = m->strConfigFilename.assignNoThrow(m->strLeasesFilename);
1250	if (RT_SUCCESS(vrc))
1251	vrc = m->strConfigFilename.appendNoThrow("-Dhcpd.config");
1252
1253
1254	/* The log file: */
1255	if (RT_SUCCESS(vrc))
1256	{
1257	vrc = m->strLogFilename.assignNoThrow(m->strLeasesFilename);
1258	if (RT_SUCCESS(vrc))
1259	vrc = m->strLogFilename.appendNoThrow("-Dhcpd.log");
1260
1261	/* Finally, complete the leases file: */
1262	if (RT_SUCCESS(vrc))
1263	{
1264	vrc = m->strLeasesFilename.appendNoThrow("-Dhcpd.leases");
1265	if (RT_SUCCESS(vrc))
1266	{
1267	RTPathPurgeFilename(RTPathFilename(m->strLeasesFilename.mutableRaw()), RTPATH_STR_F_STYLE_HOST);
1268	m->strLeasesFilename.jolt();
1269	return S_OK;
1270	}
1271	}
1272	}
1273	}
1274	return setErrorBoth(E_FAIL, vrc, tr("Failed to construct leases, config and log filenames: %Rrc"), vrc);
1275	}
1276

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source: vbox/trunk/src/VBox/Main/src-server/DHCPServerImpl.cpp@ 106901

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