VBoxNetDHCP.cpp@ 49327

Last change on this file since 49327 was 49327, checked in by vboxsync, 11 years ago

NetworkService/DHCP: refactoring:

Client and Lease are use shared data.
data moved to closer to implementations and accessible via accessors.

Property svn:eol-style set to native
Property svn:keywords set to Author Date Id Revision

File size: 33.2 KB

Line
1	/* $Id: VBoxNetDHCP.cpp 49327 2013-10-30 04:45:35Z 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	#include "../NetLib/shared_ptr.h"
59
60	#include <vector>
61	#include <list>
62	#include <string>
63	#include <map>
64
65	#include "../NetLib/VBoxNetBaseService.h"
66
67	#ifdef RT_OS_WINDOWS /* WinMain */
68	# include <Windows.h>
69	# include <stdlib.h>
70	# ifdef INET_ADDRSTRLEN
71	/* On Windows INET_ADDRSTRLEN defined as 22 Ws2ipdef.h, because it include port number */
72	# undef INET_ADDRSTRLEN
73	# endif
74	# define INET_ADDRSTRLEN 16
75	#else
76	# include <netinet/in.h>
77	#endif
78
79
80	#include "Config.h"
81	/*******************************************************************************
82	* Structures and Typedefs *
83	*******************************************************************************/
84	/**
85	* DHCP server instance.
86	*/
87	class VBoxNetDhcp: public VBoxNetBaseService
88	{
89	public:
90	VBoxNetDhcp();
91	virtual ~VBoxNetDhcp();
92
93	int init();
94	int run(void);
95	void usage(void) { /* XXX: document options */ };
96	int parseOpt(int rc, const RTGETOPTUNION& getOptVal);
97
98	protected:
99	bool handleDhcpMsg(uint8_t uMsgType, PCRTNETBOOTP pDhcpMsg, size_t cb);
100	bool handleDhcpReqDiscover(PCRTNETBOOTP pDhcpMsg, size_t cb);
101	bool handleDhcpReqRequest(PCRTNETBOOTP pDhcpMsg, size_t cb);
102	bool handleDhcpReqDecline(PCRTNETBOOTP pDhcpMsg, size_t cb);
103	bool handleDhcpReqRelease(PCRTNETBOOTP pDhcpMsg, size_t cb);
104
105	void debugPrintV(int32_t iMinLevel, bool fMsg, const char *pszFmt, va_list va) const;
106	static const char *debugDhcpName(uint8_t uMsgType);
107
108	protected:
109	/** @name The DHCP server specific configuration data members.
110	* @{ */
111	/*
112	* XXX: what was the plan? SQL3 or plain text file?
113	* How it will coexists with managment from VBoxManagement, who should manage db
114	* in that case (VBoxManage, VBoxSVC ???)
115	*/
116	std::string m_LeaseDBName;
117
118	/** @} */
119
120	/* corresponding dhcp server description in Main */
121	ComPtr<IDHCPServer> m_DhcpServer;
122
123	ComPtr<INATNetwork> m_NATNetwork;
124
125	/*
126	* We will ignore cmd line parameters IFF there will be some DHCP specific arguments
127	* otherwise all paramters will come from Main.
128	*/
129	bool m_fIgnoreCmdLineParameters;
130
131	/*
132	* -b -n 10.0.1.2 -m 255.255.255.0 -> to the list processing in
133	*/
134	typedef struct
135	{
136	char Key;
137	std::string strValue;
138	} CMDLNPRM;
139	std::list<CMDLNPRM> CmdParameterll;
140	typedef std::list<CMDLNPRM>::iterator CmdParameterIterator;
141
142	/** @name Debug stuff
143	* @{ */
144	int32_t m_cVerbosity;
145	uint8_t m_uCurMsgType;
146	size_t m_cbCurMsg;
147	PCRTNETBOOTP m_pCurMsg;
148	VBOXNETUDPHDRS m_CurHdrs;
149	/** @} */
150	};
151	#if 0
152	/* XXX: clean up it. */
153	typedef std::vector<VBoxNetDhcpLease> DhcpLeaseContainer;
154	typedef DhcpLeaseContainer::iterator DhcpLeaseIterator;
155	typedef DhcpLeaseContainer::reverse_iterator DhcpLeaseRIterator;
156	typedef DhcpLeaseContainer::const_iterator DhcpLeaseCIterator;
157	#endif
158
159	/*******************************************************************************
160	* Global Variables *
161	*******************************************************************************/
162	/** Pointer to the DHCP server. */
163	static VBoxNetDhcp *g_pDhcp;
164
165	/* DHCP server specific options */
166	static const RTGETOPTDEF g_aOptionDefs[] =
167	{
168	{ "--lease-db", 'D', RTGETOPT_REQ_STRING },
169	{ "--begin-config", 'b', RTGETOPT_REQ_NOTHING },
170	{ "--gateway", 'g', RTGETOPT_REQ_IPV4ADDR },
171	{ "--lower-ip", 'l', RTGETOPT_REQ_IPV4ADDR },
172	{ "--upper-ip", 'u', RTGETOPT_REQ_IPV4ADDR },
173	};
174
175	#if 0
176	/* XXX this will gone */
177	/**
178	* Offer this lease to a client.
179	*
180	* @param xid The transaction ID.
181	*/
182	void VBoxNetDhcpLease::offer(uint32_t xid)
183	{
184	m_enmState = kState_Offer;
185	m_xid = xid;
186	RTTimeNow(&m_ExpireTime);
187	RTTimeSpecAddSeconds(&m_ExpireTime, 60);
188	}
189
190
191	/**
192	* Activate this lease (i.e. a client is now using it).
193	*/
194	void VBoxNetDhcpLease::activate(void)
195	{
196	m_enmState = kState_Active;
197	RTTimeNow(&m_ExpireTime);
198	RTTimeSpecAddSeconds(&m_ExpireTime, m_pCfg ? m_pCfg->m_cSecLease : 60); /* m_pCfg can be NULL right now... */
199	}
200
201
202	/**
203	* Activate this lease with a new transaction ID.
204	*
205	* @param xid The transaction ID.
206	* @todo check if this is really necessary.
207	*/
208	void VBoxNetDhcpLease::activate(uint32_t xid)
209	{
210	activate();
211	m_xid = xid;
212	}
213
214
215	/**
216	* Release a lease either upon client request or because it didn't quite match a
217	* DHCP_REQUEST.
218	*/
219	void VBoxNetDhcpLease::release(void)
220	{
221	m_enmState = kState_Free;
222	RTTimeNow(&m_ExpireTime);
223	RTTimeSpecAddSeconds(&m_ExpireTime, 5);
224	}
225
226
227	/**
228	* Checks if the lease has expired or not.
229	*
230	* This just checks the expiration time not the state. This is so that this
231	* method will work for reusing RELEASEd leases when the client comes back after
232	* a reboot or ipconfig /renew. Callers not interested in info on released
233	* leases should check the state first.
234	*
235	* @returns true if expired, false if not.
236	*/
237	bool VBoxNetDhcpLease::hasExpired() const
238	{
239	RTTIMESPEC Now;
240	return RTTimeSpecGetSeconds(&m_ExpireTime) > RTTimeSpecGetSeconds(RTTimeNow(&Now));
241	}
242	#endif
243
244	/**
245	* Construct a DHCP server with a default configuration.
246	*/
247	VBoxNetDhcp::VBoxNetDhcp()
248	{
249	m_Name = "VBoxNetDhcp";
250	m_Network = "VBoxNetDhcp";
251	m_TrunkName = "";
252	m_enmTrunkType = kIntNetTrunkType_WhateverNone;
253	m_MacAddress.au8[0] = 0x08;
254	m_MacAddress.au8[1] = 0x00;
255	m_MacAddress.au8[2] = 0x27;
256	m_MacAddress.au8[3] = 0x40;
257	m_MacAddress.au8[4] = 0x41;
258	m_MacAddress.au8[5] = 0x42;
259	m_Ipv4Address.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2, 5)));
260
261	m_pSession = NIL_RTR0PTR;
262	m_cbSendBuf = 8192;
263	m_cbRecvBuf = 51200; /** @todo tune to 64 KB with help from SrvIntR0 */
264	m_hIf = INTNET_HANDLE_INVALID;
265	m_pIfBuf = NULL;
266
267	m_cVerbosity = 0;
268	m_uCurMsgType = UINT8_MAX;
269	m_cbCurMsg = 0;
270	m_pCurMsg = NULL;
271	memset(&m_CurHdrs, '\0', sizeof(m_CurHdrs));
272
273	m_fIgnoreCmdLineParameters = true;
274
275	#if 0 /* enable to hack the code without a mile long argument list. */
276	VBoxNetDhcpCfg *pDefCfg = new VBoxNetDhcpCfg();
277	pDefCfg->m_LowerAddr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2,100)));
278	pDefCfg->m_UpperAddr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2,250)));
279	pDefCfg->m_SubnetMask.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8(255,255,255, 0)));
280	RTNETADDRIPV4 Addr;
281	Addr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2, 1)));
282	pDefCfg->m_Routers.push_back(Addr);
283	Addr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2, 2)));
284	pDefCfg->m_DNSes.push_back(Addr);
285	pDefCfg->m_DomainName = "vboxnetdhcp.org";
286	# if 0
287	pDefCfg->m_cSecLease = 6060; / 1 hour */
288	# else
289	pDefCfg->m_cSecLease = 30; /* sec */
290	# endif
291	pDefCfg->m_TftpServer = "10.0.2.3"; //??
292	this->addConfig(pDefCfg);
293	#endif
294	}
295
296
297	/**
298	* Destruct a DHCP server.
299	*/
300	VBoxNetDhcp::~VBoxNetDhcp()
301	{
302	}
303
304
305
306
307	/**
308	* Parse the DHCP specific arguments.
309	*
310	* This callback caled for each paramenter so
311	* ....
312	* we nee post analisys of the parameters, at least
313	* for -b, -g, -l, -u, -m
314	*/
315	int VBoxNetDhcp::parseOpt(int rc, const RTGETOPTUNION& Val)
316	{
317	CMDLNPRM prm;
318
319	/* Ok, we've entered here, thus we can't ignore cmd line parameters anymore */
320	m_fIgnoreCmdLineParameters = false;
321
322	prm.Key = rc;
323
324	switch (rc)
325	{
326	/* Begin config. */
327	case 'b':
328	CmdParameterll.push_back(prm);
329	break;
330
331	case 'l':
332	case 'u':
333	case 'm':
334	case 'g':
335	prm.strValue = std::string(Val.psz);
336	CmdParameterll.push_back(prm);
337	break;
338
339	case 'D':
340	break;
341
342	default:
343	rc = RTGetOptPrintError(rc, &Val);
344	RTPrintf("Use --help for more information.\n");
345	return rc;
346	}
347
348	return rc;
349	}
350
351	int VBoxNetDhcp::init()
352	{
353	HRESULT hrc = S_OK;
354	/* ok, here we should initiate instance of dhcp server
355	* and listener for Dhcp configuration events
356	*/
357	AssertRCReturn(virtualbox.isNull(), VERR_INTERNAL_ERROR);
358
359	hrc = virtualbox->FindDHCPServerByNetworkName(com::Bstr(m_Network.c_str()).raw(),
360	m_DhcpServer.asOutParam());
361	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
362
363	hrc = virtualbox->FindNATNetworkByName(com::Bstr(m_Network.c_str()).raw(),
364	m_NATNetwork.asOutParam());
365
366	/* This isn't fatal in general case.
367	* AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
368	*/
369
370	ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
371	AssertPtrReturn(confManager, VERR_INTERNAL_ERROR);
372
373	/*
374	* if we have nat netework of the same name
375	* this is good chance that we are assigned to this network.
376	*/
377	BOOL fNeedDhcpServer = false;
378	if ( !m_NATNetwork.isNull()
379	&& SUCCEEDED(m_NATNetwork->COMGETTER(NeedDhcpServer)(&fNeedDhcpServer))
380	&& fNeedDhcpServer)
381	{
382	/* 90% we are servicing NAT network */
383	RTNETADDRIPV4 gateway;
384	com::Bstr strGateway;
385	hrc = m_NATNetwork->COMGETTER(Gateway)(strGateway.asOutParam());
386	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
387	RTNetStrToIPv4Addr(com::Utf8Str(strGateway).c_str(), &gateway);
388
389	confManager->addToAddressList(RTNET_DHCP_OPT_ROUTERS, gateway);
390
391	unsigned int i;
392	unsigned int count_strs;
393	com::SafeArray<BSTR> strs;
394	std::map<RTNETADDRIPV4, uint32_t> MapIp4Addr2Off;
395
396	hrc = m_NATNetwork->COMGETTER(LocalMappings)(ComSafeArrayAsOutParam(strs));
397	if ( SUCCEEDED(hrc)
398	&& (count_strs = strs.size()))
399	{
400	for (i = 0; i < count_strs; ++i)
401	{
402	char szAddr[17];
403	RTNETADDRIPV4 ip4addr;
404	char *pszTerm;
405	uint32_t u32Off;
406	com::Utf8Str strLo2Off(strs[i]);
407	const char *pszLo2Off = strLo2Off.c_str();
408
409	RT_ZERO(szAddr);
410
411	pszTerm = RTStrStr(pszLo2Off, "=");
412
413	if ( pszTerm
414	&& (pszTerm - pszLo2Off) <= INET_ADDRSTRLEN)
415	{
416	memcpy(szAddr, pszLo2Off, (pszTerm - pszLo2Off));
417	int rc = RTNetStrToIPv4Addr(szAddr, &ip4addr);
418	if (RT_SUCCESS(rc))
419	{
420	u32Off = RTStrToUInt32(pszTerm + 1);
421	if (u32Off != 0)
422	MapIp4Addr2Off.insert(
423	std::map<RTNETADDRIPV4,uint32_t>::value_type(ip4addr, u32Off));
424	}
425	}
426	}
427	}
428
429	strs.setNull();
430	ComPtr<IHost> host;
431	if (SUCCEEDED(virtualbox->COMGETTER(Host)(host.asOutParam())))
432	{
433	if (SUCCEEDED(host->COMGETTER(NameServers)(ComSafeArrayAsOutParam(strs))))
434	{
435	RTNETADDRIPV4 addr;
436	confManager->flushAddressList(RTNET_DHCP_OPT_DNS);
437	int rc;
438	for (i = 0; i < strs.size(); ++i)
439	{
440	rc = RTNetStrToIPv4Addr(com::Utf8Str(strs[i]).c_str(), &addr);
441	if (RT_SUCCESS(rc))
442	{
443	if (addr.au8[0] == 127)
444	{
445	if (MapIp4Addr2Off[addr] != 0)
446	{
447	addr.u = RT_H2N_U32(RT_N2H_U32(m_Ipv4Address.u & m_Ipv4Netmask.u)
448	+ MapIp4Addr2Off[addr]);
449	}
450	else
451	continue;
452	}
453
454	confManager->addToAddressList(RTNET_DHCP_OPT_DNS, addr);
455	}
456	}
457	}
458
459	strs.setNull();
460	#if 0
461	if (SUCCEEDED(host->COMGETTER(SearchStrings)(ComSafeArrayAsOutParam(strs))))
462	{
463	/* XXX: todo. */;
464	}
465	strs.setNull();
466	#endif
467	com::Bstr domain;
468	if (SUCCEEDED(host->COMGETTER(DomainName)(domain.asOutParam())))
469	confManager->setString(RTNET_DHCP_OPT_DOMAIN_NAME, std::string(com::Utf8Str(domain).c_str()));
470
471
472	}
473
474	}
475
476	NetworkManager *netManager = NetworkManager::getNetworkManager();
477
478	netManager->setOurAddress(m_Ipv4Address);
479	netManager->setOurNetmask(m_Ipv4Netmask);
480	netManager->setOurMac(m_MacAddress);
481
482	/* Configuration fetching */
483	if (m_fIgnoreCmdLineParameters)
484	{
485	/* just fetch option array and add options to config */
486	/* per VM-settings ???
487	*
488	* - we have vms with attached adapters with known mac-addresses
489	* - mac-addresses might be changed as well as names, how keep our config cleaned ????
490	*/
491	com::SafeArray<BSTR> sf;
492	hrc = m_DhcpServer->COMGETTER(GlobalOptions)(ComSafeArrayAsOutParam(sf));
493	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
494
495	#if 0
496	for (int i = 0; i < sf.size(); ++i)
497	{
498	RTPrintf("%d: %s\n", i, com::Utf8Str(sf[i]).c_str());
499	}
500
501	#endif
502	com::Bstr strUpperIp, strLowerIp;
503
504	RTNETADDRIPV4 LowerAddress;
505	RTNETADDRIPV4 UpperAddress;
506
507	hrc = m_DhcpServer->COMGETTER(UpperIP)(strUpperIp.asOutParam());
508	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
509	RTNetStrToIPv4Addr(com::Utf8Str(strUpperIp).c_str(), &UpperAddress);
510
511
512	hrc = m_DhcpServer->COMGETTER(LowerIP)(strLowerIp.asOutParam());
513	AssertComRCReturn(hrc, VERR_INTERNAL_ERROR);
514	RTNetStrToIPv4Addr(com::Utf8Str(strLowerIp).c_str(), &LowerAddress);
515
516	RTNETADDRIPV4 networkId;
517	networkId.u = m_Ipv4Address.u & m_Ipv4Netmask.u;
518	std::string name = std::string("default");
519
520	NetworkConfigEntity *pCfg = confManager->addNetwork(unconst(g_RootConfig),
521	networkId,
522	m_Ipv4Netmask,
523	LowerAddress,
524	UpperAddress);
525
526	} /* if(m_fIgnoreCmdLineParameters) */
527	else
528	{
529	CmdParameterIterator it;
530
531	RTNETADDRIPV4 networkId;
532	networkId.u = m_Ipv4Address.u & m_Ipv4Netmask.u;
533	RTNETADDRIPV4 netmask = m_Ipv4Netmask;
534	RTNETADDRIPV4 LowerAddress;
535	RTNETADDRIPV4 UpperAddress;
536
537	LowerAddress = networkId;
538	UpperAddress.u = RT_H2N_U32(RT_N2H_U32(LowerAddress.u) \| RT_N2H_U32(netmask.u));
539
540	int idx = 0;
541	char name[64];
542
543
544	for (it = CmdParameterll.begin(); it != CmdParameterll.end(); ++it)
545	{
546	idx++;
547	RTStrPrintf(name, RT_ELEMENTS(name), "network-%d", idx);
548	std::string strname(name);
549
550	switch(it->Key)
551	{
552	case 'b':
553	/* config */
554	NetworkConfigEntity(strname,
555	g_RootConfig,
556	g_AnyClient,
557	5,
558	networkId,
559	netmask,
560	LowerAddress,
561	UpperAddress);
562	case 'l':
563	case 'u':
564	case 'm':
565	case 'g':
566	/* XXX: TBD */
567	break;
568	}
569	}
570	}
571	return VINF_SUCCESS;
572	}
573
574	/**
575	* Runs the DHCP server.
576	*
577	* @returns exit code + error message to stderr on failure, won't return on
578	* success (you must kill this process).
579	*/
580	int VBoxNetDhcp::run(void)
581	{
582
583	/* XXX: shortcut should be hidden from network manager */
584	NetworkManager *netManager = NetworkManager::getNetworkManager();
585	netManager->m_pSession = m_pSession;
586	netManager->m_hIf = m_hIf;
587	netManager->m_pIfBuf = m_pIfBuf;
588
589	/*
590	* The loop.
591	*/
592	PINTNETRINGBUF pRingBuf = &m_pIfBuf->Recv;
593	for (;;)
594	{
595	/*
596	* Wait for a packet to become available.
597	*/
598	INTNETIFWAITREQ WaitReq;
599	WaitReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
600	WaitReq.Hdr.cbReq = sizeof(WaitReq);
601	WaitReq.pSession = m_pSession;
602	WaitReq.hIf = m_hIf;
603	WaitReq.cMillies = 2000; /* 2 secs - the sleep is for some reason uninterruptible... / /* @todo fix interruptability in SrvIntNet! */
604	int rc = SUPR3CallVMMR0Ex(NIL_RTR0PTR, NIL_VMCPUID, VMMR0_DO_INTNET_IF_WAIT, 0, &WaitReq.Hdr);
605	if (RT_FAILURE(rc))
606	{
607	if (rc == VERR_TIMEOUT \|\| rc == VERR_INTERRUPTED)
608	continue;
609	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: VMMR0_DO_INTNET_IF_WAIT returned %Rrc\n", rc);
610	return 1;
611	}
612
613	/*
614	* Process the receive buffer.
615	*/
616	while (IntNetRingHasMoreToRead(pRingBuf))
617	{
618	size_t cb;
619	void *pv = VBoxNetUDPMatch(m_pIfBuf, RTNETIPV4_PORT_BOOTPS, &m_MacAddress,
620	VBOXNETUDP_MATCH_UNICAST \| VBOXNETUDP_MATCH_BROADCAST \| VBOXNETUDP_MATCH_CHECKSUM
621	\| (m_cVerbosity > 2 ? VBOXNETUDP_MATCH_PRINT_STDERR : 0),
622	&m_CurHdrs, &cb);
623	if (pv && cb)
624	{
625	PCRTNETBOOTP pDhcpMsg = (PCRTNETBOOTP)pv;
626	m_pCurMsg = pDhcpMsg;
627	m_cbCurMsg = cb;
628
629	uint8_t uMsgType;
630	if (RTNetIPv4IsDHCPValid(NULL /* why is this here? */, pDhcpMsg, cb, &uMsgType))
631	{
632	m_uCurMsgType = uMsgType;
633	handleDhcpMsg(uMsgType, pDhcpMsg, cb);
634	m_uCurMsgType = UINT8_MAX;
635	}
636	else
637	debugPrint(1, true, "VBoxNetDHCP: Skipping invalid DHCP packet.\n"); /** @todo handle pure bootp clients too? */
638
639	m_pCurMsg = NULL;
640	m_cbCurMsg = 0;
641	}
642	else if (VBoxNetArpHandleIt(m_pSession, m_hIf, m_pIfBuf, &m_MacAddress, m_Ipv4Address))
643	{
644	/* nothing */
645	}
646
647	/* Advance to the next frame. */
648	IntNetRingSkipFrame(pRingBuf);
649	}
650	}
651
652	return 0;
653	}
654
655
656	/**
657	* Handles a DHCP message.
658	*
659	* @returns true if handled, false if not.
660	* @param uMsgType The message type.
661	* @param pDhcpMsg The DHCP message.
662	* @param cb The size of the DHCP message.
663	*/
664	bool VBoxNetDhcp::handleDhcpMsg(uint8_t uMsgType, PCRTNETBOOTP pDhcpMsg, size_t cb)
665	{
666	if (pDhcpMsg->bp_op == RTNETBOOTP_OP_REQUEST)
667	{
668	switch (uMsgType)
669	{
670	case RTNET_DHCP_MT_DISCOVER:
671	return handleDhcpReqDiscover(pDhcpMsg, cb);
672
673	case RTNET_DHCP_MT_REQUEST:
674	return handleDhcpReqRequest(pDhcpMsg, cb);
675
676	case RTNET_DHCP_MT_DECLINE:
677	return handleDhcpReqDecline(pDhcpMsg, cb);
678
679	case RTNET_DHCP_MT_RELEASE:
680	return handleDhcpReqRelease(pDhcpMsg, cb);
681
682	case RTNET_DHCP_MT_INFORM:
683	debugPrint(0, true, "Should we handle this?");
684	break;
685
686	default:
687	debugPrint(0, true, "Unexpected.");
688	break;
689	}
690	}
691	return false;
692	}
693
694
695	/**
696	* The client is requesting an offer.
697	*
698	* @returns true.
699	*
700	* @param pDhcpMsg The message.
701	* @param cb The message size.
702	*/
703	bool VBoxNetDhcp::handleDhcpReqDiscover(PCRTNETBOOTP pDhcpMsg, size_t cb)
704	{
705
706	/* let's main first */
707	if (!m_DhcpServer.isNull())
708	{
709	#if 0
710	HRESULT hrc;
711	com::SafeArray<BSTR> sf;
712	hrc = m_DhcpServer->GetMacOptions(com::BstrFmt("%02X%02X%02X%02X%02X%02X",
713	pDhcpMsg->bp_chaddr.Mac.au8[0],
714	pDhcpMsg->bp_chaddr.Mac.au8[1],
715	pDhcpMsg->bp_chaddr.Mac.au8[2],
716	pDhcpMsg->bp_chaddr.Mac.au8[3],
717	pDhcpMsg->bp_chaddr.Mac.au8[4],
718	pDhcpMsg->bp_chaddr.Mac.au8[5]).raw(),
719	ComSafeArrayAsOutParam(sf));
720	if (SUCCEEDED(hrc))
721	{
722	/* XXX: per-host configuration */
723	}
724	#endif
725	RawOption opt;
726	memset(&opt, 0, sizeof(RawOption));
727	/* 1. Find client */
728	ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
729	Client client = confManager->getClientByDhcpPacket(pDhcpMsg, cb);
730
731	/* 2. Find/Bind lease for client */
732	Lease lease = confManager->allocateLease4Client(client, pDhcpMsg, cb);
733	AssertReturn(lease != Lease::NullLease, VINF_SUCCESS);
734
735	int rc = ConfigurationManager::extractRequestList(pDhcpMsg, cb, opt);
736
737	/* 3. Send of offer */
738	NetworkManager *networkManager = NetworkManager::getNetworkManager();
739
740	lease.bindingPhase(true);
741	lease.phaseStart(RTTimeMilliTS());
742	lease.setExpiration(300); /* 3 min. */
743	networkManager->offer4Client(client, pDhcpMsg->bp_xid, opt.au8RawOpt, opt.cbRawOpt);
744	} /* end of if(!m_DhcpServer.isNull()) */
745
746	return VINF_SUCCESS;
747	}
748
749
750	/**
751	* The client is requesting an offer.
752	*
753	* @returns true.
754	*
755	* @param pDhcpMsg The message.
756	* @param cb The message size.
757	*/
758	bool VBoxNetDhcp::handleDhcpReqRequest(PCRTNETBOOTP pDhcpMsg, size_t cb)
759	{
760	ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
761	NetworkManager *networkManager = NetworkManager::getNetworkManager();
762
763	/* 1. find client */
764	Client client = confManager->getClientByDhcpPacket(pDhcpMsg, cb);
765
766	/* 2. find bound lease */
767	Lease l = client.lease();
768	if (l != Lease::NullLease)
769	{
770
771	if (l.isExpired())
772	{
773	/* send client to INIT state */
774	Client c(client);
775	networkManager->nak(client, pDhcpMsg->bp_xid);
776	confManager->expireLease4Client(c);
777	return true;
778	}
779	else {
780	/* XXX: Validate request */
781	RawOption opt;
782	RT_ZERO(opt);
783
784	Client c(client);
785	int rc = confManager->commitLease4Client(c);
786	AssertRCReturn(rc, false);
787
788	rc = ConfigurationManager::extractRequestList(pDhcpMsg, cb, opt);
789	AssertRCReturn(rc, false);
790
791	networkManager->ack(client, pDhcpMsg->bp_xid, opt.au8RawOpt, opt.cbRawOpt);
792	}
793	}
794	else
795	{
796	networkManager->nak(client, pDhcpMsg->bp_xid);
797	}
798	return true;
799	}
800
801
802	/**
803	* The client is declining an offer we've made.
804	*
805	* @returns true.
806	*
807	* @param pDhcpMsg The message.
808	* @param cb The message size.
809	*/
810	bool VBoxNetDhcp::handleDhcpReqDecline(PCRTNETBOOTP, size_t)
811	{
812	/** @todo Probably need to match the server IP here to work correctly with
813	* other servers. */
814
815	/*
816	* The client is supposed to pass us option 50, requested address,
817	* from the offer. We also match the lease state. Apparently the
818	* MAC address is not supposed to be checked here.
819	*/
820
821	/** @todo this is not required in the initial implementation, do it later. */
822	debugPrint(1, true, "DECLINE is not implemented");
823	return true;
824	}
825
826
827	/**
828	* The client is releasing its lease - good boy.
829	*
830	* @returns true.
831	*
832	* @param pDhcpMsg The message.
833	* @param cb The message size.
834	*/
835	bool VBoxNetDhcp::handleDhcpReqRelease(PCRTNETBOOTP, size_t)
836	{
837	/** @todo Probably need to match the server IP here to work correctly with
838	* other servers. */
839
840	/*
841	* The client may pass us option 61, client identifier, which we should
842	* use to find the lease by.
843	*
844	* We're matching MAC address and lease state as well.
845	*/
846
847	/*
848	* If no client identifier or if we couldn't find a lease by using it,
849	* we will try look it up by the client IP address.
850	*/
851
852
853	/*
854	* If found, release it.
855	*/
856
857
858	/** @todo this is not required in the initial implementation, do it later. */
859	debugPrint(1, true, "RELEASE is not implemented");
860	return true;
861	}
862
863
864	/**
865	* Print debug message depending on the m_cVerbosity level.
866	*
867	* @param iMinLevel The minimum m_cVerbosity level for this message.
868	* @param fMsg Whether to dump parts for the current DHCP message.
869	* @param pszFmt The message format string.
870	* @param va Optional arguments.
871	*/
872	void VBoxNetDhcp::debugPrintV(int iMinLevel, bool fMsg, const char *pszFmt, va_list va) const
873	{
874	if (iMinLevel <= m_cVerbosity)
875	{
876	va_list vaCopy; /* This dude is very special, thus the copy. */
877	va_copy(vaCopy, va);
878	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: %s: %N\n", iMinLevel >= 2 ? "debug" : "info", pszFmt, &vaCopy);
879	va_end(vaCopy);
880
881	if ( fMsg
882	&& m_cVerbosity >= 2
883	&& m_pCurMsg)
884	{
885	/* XXX: export this to debugPrinfDhcpMsg or variant and other method export
886	* to base class
887	*/
888	const char *pszMsg = m_uCurMsgType != UINT8_MAX ? debugDhcpName(m_uCurMsgType) : "";
889	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",
890	pszMsg,
891	&m_pCurMsg->bp_chaddr,
892	m_pCurMsg->bp_ciaddr.au8[0], m_pCurMsg->bp_ciaddr.au8[1], m_pCurMsg->bp_ciaddr.au8[2], m_pCurMsg->bp_ciaddr.au8[3],
893	m_pCurMsg->bp_yiaddr.au8[0], m_pCurMsg->bp_yiaddr.au8[1], m_pCurMsg->bp_yiaddr.au8[2], m_pCurMsg->bp_yiaddr.au8[3],
894	m_pCurMsg->bp_siaddr.au8[0], m_pCurMsg->bp_siaddr.au8[1], m_pCurMsg->bp_siaddr.au8[2], m_pCurMsg->bp_siaddr.au8[3],
895	m_pCurMsg->bp_xid);
896	}
897	}
898	}
899
900
901	/**
902	* Gets the name of given DHCP message type.
903	*
904	* @returns Readonly name.
905	* @param uMsgType The message number.
906	*/
907	/* static / const char VBoxNetDhcp::debugDhcpName(uint8_t uMsgType)
908	{
909	switch (uMsgType)
910	{
911	case 0: return "MT_00";
912	case RTNET_DHCP_MT_DISCOVER: return "DISCOVER";
913	case RTNET_DHCP_MT_OFFER: return "OFFER";
914	case RTNET_DHCP_MT_REQUEST: return "REQUEST";
915	case RTNET_DHCP_MT_DECLINE: return "DECLINE";
916	case RTNET_DHCP_MT_ACK: return "ACK";
917	case RTNET_DHCP_MT_NAC: return "NAC";
918	case RTNET_DHCP_MT_RELEASE: return "RELEASE";
919	case RTNET_DHCP_MT_INFORM: return "INFORM";
920	case 9: return "MT_09";
921	case 10: return "MT_0a";
922	case 11: return "MT_0b";
923	case 12: return "MT_0c";
924	case 13: return "MT_0d";
925	case 14: return "MT_0e";
926	case 15: return "MT_0f";
927	case 16: return "MT_10";
928	case 17: return "MT_11";
929	case 18: return "MT_12";
930	case 19: return "MT_13";
931	case UINT8_MAX: return "MT_ff";
932	default: return "UNKNOWN";
933	}
934	}
935
936
937
938	/**
939	* Entry point.
940	*/
941	extern "C" DECLEXPORT(int) TrustedMain(int argc, char **argv)
942	{
943	/*
944	* Instantiate the DHCP server and hand it the options.
945	*/
946	HRESULT hrc = com::Initialize();
947	Assert(!FAILED(hrc));
948
949	VBoxNetDhcp *pDhcp = new VBoxNetDhcp();
950	if (!pDhcp)
951	{
952	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: new VBoxNetDhcp failed!\n");
953	return 1;
954	}
955	int rc = pDhcp->parseArgs(argc - 1, argv + 1);
956	if (rc)
957	return rc;
958
959	pDhcp->init();
960
961	/*
962	* Try connect the server to the network.
963	*/
964	rc = pDhcp->tryGoOnline();
965	if (rc)
966	{
967	delete pDhcp;
968	return rc;
969	}
970
971	/*
972	* Process requests.
973	*/
974	g_pDhcp = pDhcp;
975	rc = pDhcp->run();
976	g_pDhcp = NULL;
977	delete pDhcp;
978
979	return rc;
980	}
981
982
983	#ifndef VBOX_WITH_HARDENING
984
985	int main(int argc, char **argv)
986	{
987	int rc = RTR3InitExe(argc, &argv, RTR3INIT_FLAGS_SUPLIB);
988	if (RT_FAILURE(rc))
989	return RTMsgInitFailure(rc);
990
991	return TrustedMain(argc, argv);
992	}
993
994	# ifdef RT_OS_WINDOWS
995
996	static LRESULT CALLBACK WindowProc(HWND hwnd,
997	UINT uMsg,
998	WPARAM wParam,
999	LPARAM lParam
1000	)
1001	{
1002	if(uMsg == WM_DESTROY)
1003	{
1004	PostQuitMessage(0);
1005	return 0;
1006	}
1007	return DefWindowProc (hwnd, uMsg, wParam, lParam);
1008	}
1009
1010	static LPCWSTR g_WndClassName = L"VBoxNetDHCPClass";
1011
1012	static DWORD WINAPI MsgThreadProc(__in LPVOID lpParameter)
1013	{
1014	HWND hwnd = 0;
1015	HINSTANCE hInstance = (HINSTANCE)GetModuleHandle (NULL);
1016	bool bExit = false;
1017
1018	/* Register the Window Class. */
1019	WNDCLASS wc;
1020	wc.style = 0;
1021	wc.lpfnWndProc = WindowProc;
1022	wc.cbClsExtra = 0;
1023	wc.cbWndExtra = sizeof(void *);
1024	wc.hInstance = hInstance;
1025	wc.hIcon = NULL;
1026	wc.hCursor = NULL;
1027	wc.hbrBackground = (HBRUSH)(COLOR_BACKGROUND + 1);
1028	wc.lpszMenuName = NULL;
1029	wc.lpszClassName = g_WndClassName;
1030
1031	ATOM atomWindowClass = RegisterClass(&wc);
1032
1033	if (atomWindowClass != 0)
1034	{
1035	/* Create the window. */
1036	hwnd = CreateWindowEx (WS_EX_TOOLWINDOW \| WS_EX_TRANSPARENT \| WS_EX_TOPMOST,
1037	g_WndClassName, g_WndClassName,
1038	WS_POPUPWINDOW,
1039	-200, -200, 100, 100, NULL, NULL, hInstance, NULL);
1040
1041	if (hwnd)
1042	{
1043	SetWindowPos(hwnd, HWND_TOPMOST, -200, -200, 0, 0,
1044	SWP_NOACTIVATE \| SWP_HIDEWINDOW \| SWP_NOCOPYBITS \| SWP_NOREDRAW \| SWP_NOSIZE);
1045
1046	MSG msg;
1047	while (GetMessage(&msg, NULL, 0, 0))
1048	{
1049	TranslateMessage(&msg);
1050	DispatchMessage(&msg);
1051	}
1052
1053	DestroyWindow (hwnd);
1054
1055	bExit = true;
1056	}
1057
1058	UnregisterClass (g_WndClassName, hInstance);
1059	}
1060
1061	if(bExit)
1062	{
1063	/* no need any accuracy here, in anyway the DHCP server usually gets terminated with TerminateProcess */
1064	exit(0);
1065	}
1066
1067	return 0;
1068	}
1069
1070
1071	/** (We don't want a console usually.) */
1072	int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
1073	{
1074	NOREF(hInstance); NOREF(hPrevInstance); NOREF(lpCmdLine); NOREF(nCmdShow);
1075
1076	HANDLE hThread = CreateThread(
1077	NULL, /__in_opt LPSECURITY_ATTRIBUTES lpThreadAttributes, /
1078	0, /__in SIZE_T dwStackSize, /
1079	MsgThreadProc, /__in LPTHREAD_START_ROUTINE lpStartAddress,/
1080	NULL, /__in_opt LPVOID lpParameter,/
1081	0, /__in DWORD dwCreationFlags,/
1082	NULL /__out_opt LPDWORD lpThreadId/
1083	);
1084
1085	if(hThread != NULL)
1086	CloseHandle(hThread);
1087
1088	return main(__argc, __argv);
1089	}
1090	# endif /* RT_OS_WINDOWS */
1091
1092	#endif /* !VBOX_WITH_HARDENING */
1093

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source: vbox/trunk/src/VBox/NetworkServices/DHCP/VBoxNetDHCP.cpp@ 49327

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