VBoxNetDHCP.cpp@ 48420

Last change on this file since 48420 was 48414, checked in by vboxsync, 11 years ago
VBoxNetDHCP: nits.
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1	/* $Id: VBoxNetDHCP.cpp 48414 2013-09-10 14:51:02Z vboxsync $ */
2	/** @file
3	* VBoxNetDHCP - DHCP Service for connecting to IntNet.
4	*/
5
6	/*
7	* Copyright (C) 2009-2011 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	/** @page pg_net_dhcp VBoxNetDHCP
19	*
20	* Write a few words...
21	*
22	*/
23
24	/*******************************************************************************
25	* Header Files *
26	*******************************************************************************/
27	#include <VBox/com/com.h>
28	#include <VBox/com/listeners.h>
29	#include <VBox/com/string.h>
30	#include <VBox/com/Guid.h>
31	#include <VBox/com/array.h>
32	#include <VBox/com/ErrorInfo.h>
33	#include <VBox/com/errorprint.h>
34	#include <VBox/com/EventQueue.h>
35	#include <VBox/com/VirtualBox.h>
36
37	#include <iprt/alloca.h>
38	#include <iprt/buildconfig.h>
39	#include <iprt/err.h>
40	#include <iprt/net.h> /* must come before getopt */
41	#include <iprt/getopt.h>
42	#include <iprt/initterm.h>
43	#include <iprt/message.h>
44	#include <iprt/param.h>
45	#include <iprt/path.h>
46	#include <iprt/stream.h>
47	#include <iprt/time.h>
48	#include <iprt/string.h>
49
50	#include <VBox/sup.h>
51	#include <VBox/intnet.h>
52	#include <VBox/intnetinline.h>
53	#include <VBox/vmm/vmm.h>
54	#include <VBox/version.h>
55
56
57	#include "../NetLib/VBoxNetLib.h"
58
59	#include <vector>
60	#include <list>
61	#include <string>
62	#include <map>
63
64	#include "../NetLib/VBoxNetBaseService.h"
65
66	#ifdef RT_OS_WINDOWS /* WinMain */
67	# include <Windows.h>
68	# include <stdlib.h>
69	# ifdef INET_ADDRSTRLEN
70	/* On Windows INET_ADDRSTRLEN defined as 22 Ws2ipdef.h, because it include port number */
71	# undef INET_ADDRSTRLEN
72	# endif
73	# define INET_ADDRSTRLEN 16
74	#else
75	# include <netinet/in.h>
76	#endif
77
78
79	#include "Config.h"
80	/*******************************************************************************
81	* Structures and Typedefs *
82	*******************************************************************************/
83	/**
84	* DHCP server instance.
85	*/
86	class VBoxNetDhcp: public VBoxNetBaseService
87	{
88	public:
89	VBoxNetDhcp();
90	virtual ~VBoxNetDhcp();
91
92	int init();
93	int run(void);
94	void usage(void) { /* XXX: document options */ };
95	int parseOpt(int rc, const RTGETOPTUNION& getOptVal);
96
97	protected:
98	bool handleDhcpMsg(uint8_t uMsgType, PCRTNETBOOTP pDhcpMsg, size_t cb);
99	bool handleDhcpReqDiscover(PCRTNETBOOTP pDhcpMsg, size_t cb);
100	bool handleDhcpReqRequest(PCRTNETBOOTP pDhcpMsg, size_t cb);
101	bool handleDhcpReqDecline(PCRTNETBOOTP pDhcpMsg, size_t cb);
102	bool handleDhcpReqRelease(PCRTNETBOOTP pDhcpMsg, size_t cb);
103
104	void debugPrintV(int32_t iMinLevel, bool fMsg, const char *pszFmt, va_list va) const;
105	static const char *debugDhcpName(uint8_t uMsgType);
106
107	protected:
108	/** @name The DHCP server specific configuration data members.
109	* @{ */
110	/*
111	* XXX: what was the plan? SQL3 or plain text file?
112	* How it will coexists with managment from VBoxManagement, who should manage db
113	* in that case (VBoxManage, VBoxSVC ???)
114	*/
115	std::string m_LeaseDBName;
116
117	/** @} */
118
119	/* corresponding dhcp server description in Main */
120	ComPtr<IDHCPServer> m_DhcpServer;
121
122	ComPtr<INATNetwork> m_NATNetwork;
123
124	/*
125	* We will ignore cmd line parameters IFF there will be some DHCP specific arguments
126	* otherwise all paramters will come from Main.
127	*/
128	bool m_fIgnoreCmdLineParameters;
129
130	/*
131	* -b -n 10.0.1.2 -m 255.255.255.0 -> to the list processing in
132	*/
133	typedef struct
134	{
135	char Key;
136	std::string strValue;
137	} CMDLNPRM;
138	std::list<CMDLNPRM> CmdParameterll;
139	typedef std::list<CMDLNPRM>::iterator CmdParameterIterator;
140
141	/** @name Debug stuff
142	* @{ */
143	int32_t m_cVerbosity;
144	uint8_t m_uCurMsgType;
145	size_t m_cbCurMsg;
146	PCRTNETBOOTP m_pCurMsg;
147	VBOXNETUDPHDRS m_CurHdrs;
148	/** @} */
149	};
150	#if 0
151	/* XXX: clean up it. */
152	typedef std::vector<VBoxNetDhcpLease> DhcpLeaseContainer;
153	typedef DhcpLeaseContainer::iterator DhcpLeaseIterator;
154	typedef DhcpLeaseContainer::reverse_iterator DhcpLeaseRIterator;
155	typedef DhcpLeaseContainer::const_iterator DhcpLeaseCIterator;
156	#endif
157
158	/*******************************************************************************
159	* Global Variables *
160	*******************************************************************************/
161	/** Pointer to the DHCP server. */
162	static VBoxNetDhcp *g_pDhcp;
163
164	/* DHCP server specific options */
165	static const RTGETOPTDEF g_aOptionDefs[] =
166	{
167	{ "--lease-db", 'D', RTGETOPT_REQ_STRING },
168	{ "--begin-config", 'b', RTGETOPT_REQ_NOTHING },
169	{ "--gateway", 'g', RTGETOPT_REQ_IPV4ADDR },
170	{ "--lower-ip", 'l', RTGETOPT_REQ_IPV4ADDR },
171	{ "--upper-ip", 'u', RTGETOPT_REQ_IPV4ADDR },
172	};
173
174	#if 0
175	/* XXX this will gone */
176	/**
177	* Offer this lease to a client.
178	*
179	* @param xid The transaction ID.
180	*/
181	void VBoxNetDhcpLease::offer(uint32_t xid)
182	{
183	m_enmState = kState_Offer;
184	m_xid = xid;
185	RTTimeNow(&m_ExpireTime);
186	RTTimeSpecAddSeconds(&m_ExpireTime, 60);
187	}
188
189
190	/**
191	* Activate this lease (i.e. a client is now using it).
192	*/
193	void VBoxNetDhcpLease::activate(void)
194	{
195	m_enmState = kState_Active;
196	RTTimeNow(&m_ExpireTime);
197	RTTimeSpecAddSeconds(&m_ExpireTime, m_pCfg ? m_pCfg->m_cSecLease : 60); /* m_pCfg can be NULL right now... */
198	}
199
200
201	/**
202	* Activate this lease with a new transaction ID.
203	*
204	* @param xid The transaction ID.
205	* @todo check if this is really necessary.
206	*/
207	void VBoxNetDhcpLease::activate(uint32_t xid)
208	{
209	activate();
210	m_xid = xid;
211	}
212
213
214	/**
215	* Release a lease either upon client request or because it didn't quite match a
216	* DHCP_REQUEST.
217	*/
218	void VBoxNetDhcpLease::release(void)
219	{
220	m_enmState = kState_Free;
221	RTTimeNow(&m_ExpireTime);
222	RTTimeSpecAddSeconds(&m_ExpireTime, 5);
223	}
224
225
226	/**
227	* Checks if the lease has expired or not.
228	*
229	* This just checks the expiration time not the state. This is so that this
230	* method will work for reusing RELEASEd leases when the client comes back after
231	* a reboot or ipconfig /renew. Callers not interested in info on released
232	* leases should check the state first.
233	*
234	* @returns true if expired, false if not.
235	*/
236	bool VBoxNetDhcpLease::hasExpired() const
237	{
238	RTTIMESPEC Now;
239	return RTTimeSpecGetSeconds(&m_ExpireTime) > RTTimeSpecGetSeconds(RTTimeNow(&Now));
240	}
241	#endif
242
243	/**
244	* Construct a DHCP server with a default configuration.
245	*/
246	VBoxNetDhcp::VBoxNetDhcp()
247	{
248	m_Name = "VBoxNetDhcp";
249	m_Network = "VBoxNetDhcp";
250	m_TrunkName = "";
251	m_enmTrunkType = kIntNetTrunkType_WhateverNone;
252	m_MacAddress.au8[0] = 0x08;
253	m_MacAddress.au8[1] = 0x00;
254	m_MacAddress.au8[2] = 0x27;
255	m_MacAddress.au8[3] = 0x40;
256	m_MacAddress.au8[4] = 0x41;
257	m_MacAddress.au8[5] = 0x42;
258	m_Ipv4Address.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2, 5)));
259
260	m_pSession = NIL_RTR0PTR;
261	m_cbSendBuf = 8192;
262	m_cbRecvBuf = 51200; /** @todo tune to 64 KB with help from SrvIntR0 */
263	m_hIf = INTNET_HANDLE_INVALID;
264	m_pIfBuf = NULL;
265
266	m_cVerbosity = 0;
267	m_uCurMsgType = UINT8_MAX;
268	m_cbCurMsg = 0;
269	m_pCurMsg = NULL;
270	memset(&m_CurHdrs, '\0', sizeof(m_CurHdrs));
271
272	m_fIgnoreCmdLineParameters = true;
273
274	#if 0 /* enable to hack the code without a mile long argument list. */
275	VBoxNetDhcpCfg *pDefCfg = new VBoxNetDhcpCfg();
276	pDefCfg->m_LowerAddr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2,100)));
277	pDefCfg->m_UpperAddr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2,250)));
278	pDefCfg->m_SubnetMask.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8(255,255,255, 0)));
279	RTNETADDRIPV4 Addr;
280	Addr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2, 1)));
281	pDefCfg->m_Routers.push_back(Addr);
282	Addr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2, 2)));
283	pDefCfg->m_DNSes.push_back(Addr);
284	pDefCfg->m_DomainName = "vboxnetdhcp.org";
285	# if 0
286	pDefCfg->m_cSecLease = 6060; / 1 hour */
287	# else
288	pDefCfg->m_cSecLease = 30; /* sec */
289	# endif
290	pDefCfg->m_TftpServer = "10.0.2.3"; //??
291	this->addConfig(pDefCfg);
292	#endif
293	}
294
295
296	/**
297	* Destruct a DHCP server.
298	*/
299	VBoxNetDhcp::~VBoxNetDhcp()
300	{
301	}
302
303
304
305
306	/**
307	* Parse the DHCP specific arguments.
308	*
309	* This callback caled for each paramenter so
310	* ....
311	* we nee post analisys of the parameters, at least
312	* for -b, -g, -l, -u, -m
313	*/
314	int VBoxNetDhcp::parseOpt(int rc, const RTGETOPTUNION& Val)
315	{
316	CMDLNPRM prm;
317
318	/* Ok, we've entered here, thus we can't ignore cmd line parameters anymore */
319	m_fIgnoreCmdLineParameters = false;
320
321	prm.Key = rc;
322
323	switch (rc)
324	{
325	/* Begin config. */
326	case 'b':
327	CmdParameterll.push_back(prm);
328	break;
329
330	case 'l':
331	case 'u':
332	case 'm':
333	case 'g':
334	prm.strValue = std::string(Val.psz);
335	CmdParameterll.push_back(prm);
336	break;
337
338	case 'D':
339	break;
340
341	default:
342	rc = RTGetOptPrintError(rc, &Val);
343	RTPrintf("Use --help for more information.\n");
344	return rc;
345	}
346
347	return rc;
348	}
349
350	int VBoxNetDhcp::init()
351	{
352	HRESULT hrc = S_OK;
353	/* ok, here we should initiate instance of dhcp server
354	* and listener for Dhcp configuration events
355	*/
356	AssertRCReturn(virtualbox.isNull(), VERR_INTERNAL_ERROR);
357
358	hrc = virtualbox->FindDHCPServerByNetworkName(com::Bstr(m_Network.c_str()).raw(),
359	m_DhcpServer.asOutParam());
360	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
361
362	hrc = virtualbox->FindNATNetworkByName(com::Bstr(m_Network.c_str()).raw(),
363	m_NATNetwork.asOutParam());
364
365	/* This isn't fatal in general case.
366	* AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
367	*/
368
369	ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
370	AssertPtrReturn(confManager, VERR_INTERNAL_ERROR);
371
372	/*
373	* if we have nat netework of the same name
374	* this is good chance that we are assigned to this network.
375	*/
376	BOOL fNeedDhcpServer = false;
377	if ( !m_NATNetwork.isNull()
378	&& SUCCEEDED(m_NATNetwork->COMGETTER(NeedDhcpServer)(&fNeedDhcpServer))
379	&& fNeedDhcpServer)
380	{
381	/* 90% we are servicing NAT network */
382	RTNETADDRIPV4 gateway;
383	com::Bstr strGateway;
384	hrc = m_NATNetwork->COMGETTER(Gateway)(strGateway.asOutParam());
385	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
386	RTNetStrToIPv4Addr(com::Utf8Str(strGateway).c_str(), &gateway);
387
388	confManager->addToAddressList(RTNET_DHCP_OPT_ROUTERS, gateway);
389
390	unsigned int i;
391	unsigned int count_strs;
392	com::SafeArray<BSTR> strs;
393	std::map<RTNETADDRIPV4, uint32_t> MapIp4Addr2Off;
394
395	hrc = m_NATNetwork->COMGETTER(LocalMappings)(ComSafeArrayAsOutParam(strs));
396	if ( SUCCEEDED(hrc)
397	&& (count_strs = strs.size()))
398	{
399	for (i = 0; i < count_strs; ++i)
400	{
401	char aszAddr[17];
402	RTNETADDRIPV4 ip4addr;
403	char *pszTerm;
404	uint32_t u32Off;
405	const char *pszLo2Off = com::Utf8Str(strs[i]).c_str();
406
407	RT_ZERO(aszAddr);
408
409	pszTerm = RTStrStr(pszLo2Off, "=");
410
411	if ( pszTerm
412	&& (pszTerm - pszLo2Off) <= INET_ADDRSTRLEN)
413	{
414	memcpy(aszAddr, pszLo2Off, (pszTerm - pszLo2Off));
415	int rc = RTNetStrToIPv4Addr(aszAddr, &ip4addr);
416	if (RT_SUCCESS(rc))
417	{
418	u32Off = RTStrToUInt32(pszTerm + 1);
419	if (u32Off != 0)
420	MapIp4Addr2Off.insert(
421	std::map<RTNETADDRIPV4,uint32_t>::value_type(ip4addr, u32Off));
422	}
423	}
424	}
425	}
426
427	strs.setNull();
428	ComPtr<IHost> host;
429	if (SUCCEEDED(virtualbox->COMGETTER(Host)(host.asOutParam())))
430	{
431	if (SUCCEEDED(host->COMGETTER(NameServers)(ComSafeArrayAsOutParam(strs))))
432	{
433	RTNETADDRIPV4 addr;
434	confManager->flushAddressList(RTNET_DHCP_OPT_DNS);
435	int rc;
436	for (i = 0; i < strs.size(); ++i)
437	{
438	rc = RTNetStrToIPv4Addr(com::Utf8Str(strs[i]).c_str(), &addr);
439	if (RT_SUCCESS(rc))
440	{
441	if (addr.au8[0] == 127)
442	{
443	if (MapIp4Addr2Off[addr] != 0)
444	{
445	addr.u = RT_H2N_U32(RT_N2H_U32(m_Ipv4Address.u & m_Ipv4Netmask.u)
446	+ MapIp4Addr2Off[addr]);
447	}
448	else
449	continue;
450	}
451
452	confManager->addToAddressList(RTNET_DHCP_OPT_DNS, addr);
453	}
454	}
455	}
456
457	strs.setNull();
458	#if 0
459	if (SUCCEEDED(host->COMGETTER(SearchStrings)(ComSafeArrayAsOutParam(strs))))
460	{
461	/* XXX: todo. */;
462	}
463	strs.setNull();
464
465	Bstr domain;
466	if (SUCCEEDED(host->COMGETTER(DomainName)(domain.asOutPutParam())))
467	{
468	/* XXX: todo. */
469	}
470	#endif
471	}
472	}
473
474	NetworkManager *netManager = NetworkManager::getNetworkManager();
475
476	netManager->setOurAddress(m_Ipv4Address);
477	netManager->setOurNetmask(m_Ipv4Netmask);
478	netManager->setOurMac(m_MacAddress);
479
480	/* Configuration fetching */
481	if (m_fIgnoreCmdLineParameters)
482	{
483	/* just fetch option array and add options to config */
484	/* per VM-settings ???
485	*
486	* - we have vms with attached adapters with known mac-addresses
487	* - mac-addresses might be changed as well as names, how keep our config cleaned ????
488	*/
489	com::SafeArray<BSTR> sf;
490	hrc = m_DhcpServer->COMGETTER(GlobalOptions)(ComSafeArrayAsOutParam(sf));
491	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
492
493	#if 0
494	for (int i = 0; i < sf.size(); ++i)
495	{
496	RTPrintf("%d: %s\n", i, com::Utf8Str(sf[i]).c_str());
497	}
498
499	#endif
500	com::Bstr strUpperIp, strLowerIp;
501
502	RTNETADDRIPV4 LowerAddress;
503	RTNETADDRIPV4 UpperAddress;
504
505	hrc = m_DhcpServer->COMGETTER(UpperIP)(strUpperIp.asOutParam());
506	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
507	RTNetStrToIPv4Addr(com::Utf8Str(strUpperIp).c_str(), &UpperAddress);
508
509
510	hrc = m_DhcpServer->COMGETTER(LowerIP)(strLowerIp.asOutParam());
511	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
512	RTNetStrToIPv4Addr(com::Utf8Str(strLowerIp).c_str(), &LowerAddress);
513
514	RTNETADDRIPV4 networkId;
515	networkId.u = m_Ipv4Address.u & m_Ipv4Netmask.u;
516	std::string name = std::string("default");
517
518	NetworkConfigEntity *pCfg = confManager->addNetwork(unconst(g_RootConfig),
519	networkId,
520	m_Ipv4Netmask,
521	LowerAddress,
522	UpperAddress);
523
524	} /* if(m_fIgnoreCmdLineParameters) */
525	else
526	{
527	CmdParameterIterator it;
528
529	RTNETADDRIPV4 networkId;
530	networkId.u = m_Ipv4Address.u & m_Ipv4Netmask.u;
531	RTNETADDRIPV4 netmask = m_Ipv4Netmask;
532	RTNETADDRIPV4 LowerAddress;
533	RTNETADDRIPV4 UpperAddress;
534
535	LowerAddress = networkId;
536	UpperAddress.u = RT_H2N_U32(RT_N2H_U32(LowerAddress.u) \| RT_N2H_U32(netmask.u));
537
538	int idx = 0;
539	char name[64];
540
541
542	for (it = CmdParameterll.begin(); it != CmdParameterll.end(); ++it)
543	{
544	idx++;
545	RTStrPrintf(name, RT_ELEMENTS(name), "network-%d", idx);
546	std::string strname(name);
547
548	switch(it->Key)
549	{
550	case 'b':
551	/* config */
552	NetworkConfigEntity(strname,
553	g_RootConfig,
554	g_AnyClient,
555	5,
556	networkId,
557	netmask,
558	LowerAddress,
559	UpperAddress);
560	case 'l':
561	case 'u':
562	case 'm':
563	case 'g':
564	/* XXX: TBD */
565	break;
566	}
567	}
568	}
569	return VINF_SUCCESS;
570	}
571
572	/**
573	* Runs the DHCP server.
574	*
575	* @returns exit code + error message to stderr on failure, won't return on
576	* success (you must kill this process).
577	*/
578	int VBoxNetDhcp::run(void)
579	{
580
581	/* XXX: shortcut should be hidden from network manager */
582	NetworkManager *netManager = NetworkManager::getNetworkManager();
583	netManager->m_pSession = m_pSession;
584	netManager->m_hIf = m_hIf;
585	netManager->m_pIfBuf = m_pIfBuf;
586
587	/*
588	* The loop.
589	*/
590	PINTNETRINGBUF pRingBuf = &m_pIfBuf->Recv;
591	for (;;)
592	{
593	/*
594	* Wait for a packet to become available.
595	*/
596	INTNETIFWAITREQ WaitReq;
597	WaitReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
598	WaitReq.Hdr.cbReq = sizeof(WaitReq);
599	WaitReq.pSession = m_pSession;
600	WaitReq.hIf = m_hIf;
601	WaitReq.cMillies = 2000; /* 2 secs - the sleep is for some reason uninterruptible... / /* @todo fix interruptability in SrvIntNet! */
602	int rc = SUPR3CallVMMR0Ex(NIL_RTR0PTR, NIL_VMCPUID, VMMR0_DO_INTNET_IF_WAIT, 0, &WaitReq.Hdr);
603	if (RT_FAILURE(rc))
604	{
605	if (rc == VERR_TIMEOUT \|\| rc == VERR_INTERRUPTED)
606	continue;
607	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: VMMR0_DO_INTNET_IF_WAIT returned %Rrc\n", rc);
608	return 1;
609	}
610
611	/*
612	* Process the receive buffer.
613	*/
614	while (IntNetRingHasMoreToRead(pRingBuf))
615	{
616	size_t cb;
617	void *pv = VBoxNetUDPMatch(m_pIfBuf, RTNETIPV4_PORT_BOOTPS, &m_MacAddress,
618	VBOXNETUDP_MATCH_UNICAST \| VBOXNETUDP_MATCH_BROADCAST \| VBOXNETUDP_MATCH_CHECKSUM
619	\| (m_cVerbosity > 2 ? VBOXNETUDP_MATCH_PRINT_STDERR : 0),
620	&m_CurHdrs, &cb);
621	if (pv && cb)
622	{
623	PCRTNETBOOTP pDhcpMsg = (PCRTNETBOOTP)pv;
624	m_pCurMsg = pDhcpMsg;
625	m_cbCurMsg = cb;
626
627	uint8_t uMsgType;
628	if (RTNetIPv4IsDHCPValid(NULL /* why is this here? */, pDhcpMsg, cb, &uMsgType))
629	{
630	m_uCurMsgType = uMsgType;
631	handleDhcpMsg(uMsgType, pDhcpMsg, cb);
632	m_uCurMsgType = UINT8_MAX;
633	}
634	else
635	debugPrint(1, true, "VBoxNetDHCP: Skipping invalid DHCP packet.\n"); /** @todo handle pure bootp clients too? */
636
637	m_pCurMsg = NULL;
638	m_cbCurMsg = 0;
639	}
640	else if (VBoxNetArpHandleIt(m_pSession, m_hIf, m_pIfBuf, &m_MacAddress, m_Ipv4Address))
641	{
642	/* nothing */
643	}
644
645	/* Advance to the next frame. */
646	IntNetRingSkipFrame(pRingBuf);
647	}
648	}
649
650	return 0;
651	}
652
653
654	/**
655	* Handles a DHCP message.
656	*
657	* @returns true if handled, false if not.
658	* @param uMsgType The message type.
659	* @param pDhcpMsg The DHCP message.
660	* @param cb The size of the DHCP message.
661	*/
662	bool VBoxNetDhcp::handleDhcpMsg(uint8_t uMsgType, PCRTNETBOOTP pDhcpMsg, size_t cb)
663	{
664	if (pDhcpMsg->bp_op == RTNETBOOTP_OP_REQUEST)
665	{
666	switch (uMsgType)
667	{
668	case RTNET_DHCP_MT_DISCOVER:
669	return handleDhcpReqDiscover(pDhcpMsg, cb);
670
671	case RTNET_DHCP_MT_REQUEST:
672	return handleDhcpReqRequest(pDhcpMsg, cb);
673
674	case RTNET_DHCP_MT_DECLINE:
675	return handleDhcpReqDecline(pDhcpMsg, cb);
676
677	case RTNET_DHCP_MT_RELEASE:
678	return handleDhcpReqRelease(pDhcpMsg, cb);
679
680	case RTNET_DHCP_MT_INFORM:
681	debugPrint(0, true, "Should we handle this?");
682	break;
683
684	default:
685	debugPrint(0, true, "Unexpected.");
686	break;
687	}
688	}
689	return false;
690	}
691
692
693	/**
694	* The client is requesting an offer.
695	*
696	* @returns true.
697	*
698	* @param pDhcpMsg The message.
699	* @param cb The message size.
700	*/
701	bool VBoxNetDhcp::handleDhcpReqDiscover(PCRTNETBOOTP pDhcpMsg, size_t cb)
702	{
703
704	/* let's main first */
705	if (!m_DhcpServer.isNull())
706	{
707	#if 0
708	HRESULT hrc;
709	com::SafeArray<BSTR> sf;
710	hrc = m_DhcpServer->GetMacOptions(com::BstrFmt("%02X%02X%02X%02X%02X%02X",
711	pDhcpMsg->bp_chaddr.Mac.au8[0],
712	pDhcpMsg->bp_chaddr.Mac.au8[1],
713	pDhcpMsg->bp_chaddr.Mac.au8[2],
714	pDhcpMsg->bp_chaddr.Mac.au8[3],
715	pDhcpMsg->bp_chaddr.Mac.au8[4],
716	pDhcpMsg->bp_chaddr.Mac.au8[5]).raw(),
717	ComSafeArrayAsOutParam(sf));
718	if (SUCCEEDED(hrc))
719	{
720	/* XXX: per-host configuration */
721	}
722	#endif
723	RawOption opt;
724	memset(&opt, 0, sizeof(RawOption));
725	/* 1. Find client */
726	ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
727	Client *client = confManager->getClientByDhcpPacket(pDhcpMsg, cb);
728
729	/* 2. Find/Bind lease for client */
730	Lease *lease = confManager->allocateLease4Client(client, pDhcpMsg, cb);
731	AssertPtrReturn(lease, VINF_SUCCESS);
732
733	int rc = ConfigurationManager::extractRequestList(pDhcpMsg, cb, opt);
734
735	/* 3. Send of offer */
736	NetworkManager *networkManager = NetworkManager::getNetworkManager();
737
738	lease->fBinding = true;
739	lease->u64TimestampBindingStarted = RTTimeMilliTS();
740	lease->u32BindExpirationPeriod = 300; /* 3 min. */
741	networkManager->offer4Client(client, pDhcpMsg->bp_xid, opt.au8RawOpt, opt.cbRawOpt);
742	} /* end of if(!m_DhcpServer.isNull()) */
743
744	return VINF_SUCCESS;
745	}
746
747
748	/**
749	* The client is requesting an offer.
750	*
751	* @returns true.
752	*
753	* @param pDhcpMsg The message.
754	* @param cb The message size.
755	*/
756	bool VBoxNetDhcp::handleDhcpReqRequest(PCRTNETBOOTP pDhcpMsg, size_t cb)
757	{
758	ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
759	NetworkManager *networkManager = NetworkManager::getNetworkManager();
760
761	/* 1. find client */
762	Client *client = confManager->getClientByDhcpPacket(pDhcpMsg, cb);
763
764	/* 2. find bound lease */
765	if (client->m_lease)
766	{
767
768	if (client->m_lease->isExpired())
769	{
770	/* send client to INIT state */
771	networkManager->nak(client, pDhcpMsg->bp_xid);
772	confManager->expireLease4Client(client);
773	return true;
774	}
775	/* XXX: Validate request */
776	RawOption opt;
777	memset((void *)&opt, 0, sizeof(RawOption));
778
779	int rc = confManager->commitLease4Client(client);
780	AssertRCReturn(rc, false);
781
782	rc = ConfigurationManager::extractRequestList(pDhcpMsg, cb, opt);
783	AssertRCReturn(rc, false);
784
785	networkManager->ack(client, pDhcpMsg->bp_xid, opt.au8RawOpt, opt.cbRawOpt);
786	}
787	else
788	{
789	networkManager->nak(client, pDhcpMsg->bp_xid);
790	}
791	return true;
792	}
793
794
795	/**
796	* The client is declining an offer we've made.
797	*
798	* @returns true.
799	*
800	* @param pDhcpMsg The message.
801	* @param cb The message size.
802	*/
803	bool VBoxNetDhcp::handleDhcpReqDecline(PCRTNETBOOTP pDhcpMsg, size_t cb)
804	{
805	/** @todo Probably need to match the server IP here to work correctly with
806	* other servers. */
807
808	/*
809	* The client is supposed to pass us option 50, requested address,
810	* from the offer. We also match the lease state. Apparently the
811	* MAC address is not supposed to be checked here.
812	*/
813
814	/** @todo this is not required in the initial implementation, do it later. */
815	debugPrint(1, true, "DECLINE is not implemented");
816	return true;
817	}
818
819
820	/**
821	* The client is releasing its lease - good boy.
822	*
823	* @returns true.
824	*
825	* @param pDhcpMsg The message.
826	* @param cb The message size.
827	*/
828	bool VBoxNetDhcp::handleDhcpReqRelease(PCRTNETBOOTP pDhcpMsg, size_t cb)
829	{
830	/** @todo Probably need to match the server IP here to work correctly with
831	* other servers. */
832
833	/*
834	* The client may pass us option 61, client identifier, which we should
835	* use to find the lease by.
836	*
837	* We're matching MAC address and lease state as well.
838	*/
839
840	/*
841	* If no client identifier or if we couldn't find a lease by using it,
842	* we will try look it up by the client IP address.
843	*/
844
845
846	/*
847	* If found, release it.
848	*/
849
850
851	/** @todo this is not required in the initial implementation, do it later. */
852	debugPrint(1, true, "RELEASE is not implemented");
853	return true;
854	}
855
856
857	/**
858	* Print debug message depending on the m_cVerbosity level.
859	*
860	* @param iMinLevel The minimum m_cVerbosity level for this message.
861	* @param fMsg Whether to dump parts for the current DHCP message.
862	* @param pszFmt The message format string.
863	* @param va Optional arguments.
864	*/
865	void VBoxNetDhcp::debugPrintV(int iMinLevel, bool fMsg, const char *pszFmt, va_list va) const
866	{
867	if (iMinLevel <= m_cVerbosity)
868	{
869	va_list vaCopy; /* This dude is very special, thus the copy. */
870	va_copy(vaCopy, va);
871	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: %s: %N\n", iMinLevel >= 2 ? "debug" : "info", pszFmt, &vaCopy);
872	va_end(vaCopy);
873
874	if ( fMsg
875	&& m_cVerbosity >= 2
876	&& m_pCurMsg)
877	{
878	/* XXX: export this to debugPrinfDhcpMsg or variant and other method export
879	* to base class
880	*/
881	const char *pszMsg = m_uCurMsgType != UINT8_MAX ? debugDhcpName(m_uCurMsgType) : "";
882	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: debug: %8s chaddr=%.6Rhxs ciaddr=%d.%d.%d.%d yiaddr=%d.%d.%d.%d siaddr=%d.%d.%d.%d xid=%#x\n",
883	pszMsg,
884	&m_pCurMsg->bp_chaddr,
885	m_pCurMsg->bp_ciaddr.au8[0], m_pCurMsg->bp_ciaddr.au8[1], m_pCurMsg->bp_ciaddr.au8[2], m_pCurMsg->bp_ciaddr.au8[3],
886	m_pCurMsg->bp_yiaddr.au8[0], m_pCurMsg->bp_yiaddr.au8[1], m_pCurMsg->bp_yiaddr.au8[2], m_pCurMsg->bp_yiaddr.au8[3],
887	m_pCurMsg->bp_siaddr.au8[0], m_pCurMsg->bp_siaddr.au8[1], m_pCurMsg->bp_siaddr.au8[2], m_pCurMsg->bp_siaddr.au8[3],
888	m_pCurMsg->bp_xid);
889	}
890	}
891	}
892
893
894	/**
895	* Gets the name of given DHCP message type.
896	*
897	* @returns Readonly name.
898	* @param uMsgType The message number.
899	*/
900	/* static / const char VBoxNetDhcp::debugDhcpName(uint8_t uMsgType)
901	{
902	switch (uMsgType)
903	{
904	case 0: return "MT_00";
905	case RTNET_DHCP_MT_DISCOVER: return "DISCOVER";
906	case RTNET_DHCP_MT_OFFER: return "OFFER";
907	case RTNET_DHCP_MT_REQUEST: return "REQUEST";
908	case RTNET_DHCP_MT_DECLINE: return "DECLINE";
909	case RTNET_DHCP_MT_ACK: return "ACK";
910	case RTNET_DHCP_MT_NAC: return "NAC";
911	case RTNET_DHCP_MT_RELEASE: return "RELEASE";
912	case RTNET_DHCP_MT_INFORM: return "INFORM";
913	case 9: return "MT_09";
914	case 10: return "MT_0a";
915	case 11: return "MT_0b";
916	case 12: return "MT_0c";
917	case 13: return "MT_0d";
918	case 14: return "MT_0e";
919	case 15: return "MT_0f";
920	case 16: return "MT_10";
921	case 17: return "MT_11";
922	case 18: return "MT_12";
923	case 19: return "MT_13";
924	case UINT8_MAX: return "MT_ff";
925	default: return "UNKNOWN";
926	}
927	}
928
929
930
931	/**
932	* Entry point.
933	*/
934	extern "C" DECLEXPORT(int) TrustedMain(int argc, char argv, char envp)
935	{
936	/*
937	* Instantiate the DHCP server and hand it the options.
938	*/
939	HRESULT hrc = com::Initialize();
940	Assert(!FAILED(hrc));
941
942	VBoxNetDhcp *pDhcp = new VBoxNetDhcp();
943	if (!pDhcp)
944	{
945	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: new VBoxNetDhcp failed!\n");
946	return 1;
947	}
948	int rc = pDhcp->parseArgs(argc - 1, argv + 1);
949	if (rc)
950	return rc;
951
952	pDhcp->init();
953
954	/*
955	* Try connect the server to the network.
956	*/
957	rc = pDhcp->tryGoOnline();
958	if (rc)
959	{
960	delete pDhcp;
961	return rc;
962	}
963
964	/*
965	* Process requests.
966	*/
967	g_pDhcp = pDhcp;
968	rc = pDhcp->run();
969	g_pDhcp = NULL;
970	delete pDhcp;
971
972	return rc;
973	}
974
975
976	#ifndef VBOX_WITH_HARDENING
977
978	int main(int argc, char argv, char envp)
979	{
980	int rc = RTR3InitExe(argc, &argv, RTR3INIT_FLAGS_SUPLIB);
981	if (RT_FAILURE(rc))
982	return RTMsgInitFailure(rc);
983
984	return TrustedMain(argc, argv, envp);
985	}
986
987	# ifdef RT_OS_WINDOWS
988
989	static LRESULT CALLBACK WindowProc(HWND hwnd,
990	UINT uMsg,
991	WPARAM wParam,
992	LPARAM lParam
993	)
994	{
995	if(uMsg == WM_DESTROY)
996	{
997	PostQuitMessage(0);
998	return 0;
999	}
1000	return DefWindowProc (hwnd, uMsg, wParam, lParam);
1001	}
1002
1003	static LPCWSTR g_WndClassName = L"VBoxNetDHCPClass";
1004
1005	static DWORD WINAPI MsgThreadProc(__in LPVOID lpParameter)
1006	{
1007	HWND hwnd = 0;
1008	HINSTANCE hInstance = (HINSTANCE)GetModuleHandle (NULL);
1009	bool bExit = false;
1010
1011	/* Register the Window Class. */
1012	WNDCLASS wc;
1013	wc.style = 0;
1014	wc.lpfnWndProc = WindowProc;
1015	wc.cbClsExtra = 0;
1016	wc.cbWndExtra = sizeof(void *);
1017	wc.hInstance = hInstance;
1018	wc.hIcon = NULL;
1019	wc.hCursor = NULL;
1020	wc.hbrBackground = (HBRUSH)(COLOR_BACKGROUND + 1);
1021	wc.lpszMenuName = NULL;
1022	wc.lpszClassName = g_WndClassName;
1023
1024	ATOM atomWindowClass = RegisterClass(&wc);
1025
1026	if (atomWindowClass != 0)
1027	{
1028	/* Create the window. */
1029	hwnd = CreateWindowEx (WS_EX_TOOLWINDOW \| WS_EX_TRANSPARENT \| WS_EX_TOPMOST,
1030	g_WndClassName, g_WndClassName,
1031	WS_POPUPWINDOW,
1032	-200, -200, 100, 100, NULL, NULL, hInstance, NULL);
1033
1034	if (hwnd)
1035	{
1036	SetWindowPos(hwnd, HWND_TOPMOST, -200, -200, 0, 0,
1037	SWP_NOACTIVATE \| SWP_HIDEWINDOW \| SWP_NOCOPYBITS \| SWP_NOREDRAW \| SWP_NOSIZE);
1038
1039	MSG msg;
1040	while (GetMessage(&msg, NULL, 0, 0))
1041	{
1042	TranslateMessage(&msg);
1043	DispatchMessage(&msg);
1044	}
1045
1046	DestroyWindow (hwnd);
1047
1048	bExit = true;
1049	}
1050
1051	UnregisterClass (g_WndClassName, hInstance);
1052	}
1053
1054	if(bExit)
1055	{
1056	/* no need any accuracy here, in anyway the DHCP server usually gets terminated with TerminateProcess */
1057	exit(0);
1058	}
1059
1060	return 0;
1061	}
1062
1063
1064	/** (We don't want a console usually.) */
1065	int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
1066	{
1067	NOREF(hInstance); NOREF(hPrevInstance); NOREF(lpCmdLine); NOREF(nCmdShow);
1068
1069	HANDLE hThread = CreateThread(
1070	NULL, /__in_opt LPSECURITY_ATTRIBUTES lpThreadAttributes, /
1071	0, /__in SIZE_T dwStackSize, /
1072	MsgThreadProc, /__in LPTHREAD_START_ROUTINE lpStartAddress,/
1073	NULL, /__in_opt LPVOID lpParameter,/
1074	0, /__in DWORD dwCreationFlags,/
1075	NULL /__out_opt LPDWORD lpThreadId/
1076	);
1077
1078	if(hThread != NULL)
1079	CloseHandle(hThread);
1080
1081	return main(__argc, __argv, environ);
1082	}
1083	# endif /* RT_OS_WINDOWS */
1084
1085	#endif /* !VBOX_WITH_HARDENING */
1086

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source: vbox/trunk/src/VBox/NetworkServices/DHCP/VBoxNetDHCP.cpp@ 48420

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