VBoxNetDHCP.cpp@ 48401

Last change on this file since 48401 was 48401, checked in by vboxsync, 12 years ago
lwip-nat: DHCP using system wide definition INET_ADDSTRLEN, on Windows we redefine it to BSD/Posix style.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 33.1 KB

Line
1	/* $Id: VBoxNetDHCP.cpp 48401 2013-09-10 11:34:05Z 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	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
415	memcpy(aszAddr, pszLo2Off, (pszTerm - pszLo2Off));
416	int rc = RTNetStrToIPv4Addr(aszAddr, &ip4addr);
417	if (RT_SUCCESS(rc))
418	{
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
467	Bstr domain;
468	if (SUCCEEDED(host->COMGETTER(DomainName)(domain.asOutPutParam())))
469	{
470	/* XXX: todo. */
471	}
472	#endif
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	AssertPtrReturn(lease, 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->fBinding = true;
741	lease->u64TimestampBindingStarted = RTTimeMilliTS();
742	lease->u32BindExpirationPeriod = 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	if (client->m_lease)
768	{
769
770	if (client->m_lease->isExpired())
771	{
772	/* send client to INIT state */
773	networkManager->nak(client, pDhcpMsg->bp_xid);
774	confManager->expireLease4Client(client);
775	return true;
776	}
777	/* XXX: Validate request */
778	RawOption opt;
779	memset((void *)&opt, 0, sizeof(RawOption));
780
781	int rc = confManager->commitLease4Client(client);
782	AssertRCReturn(rc, false);
783
784	rc = ConfigurationManager::extractRequestList(pDhcpMsg, cb, opt);
785	AssertRCReturn(rc, false);
786
787	networkManager->ack(client, pDhcpMsg->bp_xid, opt.au8RawOpt, opt.cbRawOpt);
788	}
789	else
790	{
791	networkManager->nak(client, pDhcpMsg->bp_xid);
792	}
793	return true;
794	}
795
796
797	/**
798	* The client is declining an offer we've made.
799	*
800	* @returns true.
801	*
802	* @param pDhcpMsg The message.
803	* @param cb The message size.
804	*/
805	bool VBoxNetDhcp::handleDhcpReqDecline(PCRTNETBOOTP pDhcpMsg, size_t cb)
806	{
807	/** @todo Probably need to match the server IP here to work correctly with
808	* other servers. */
809
810	/*
811	* The client is supposed to pass us option 50, requested address,
812	* from the offer. We also match the lease state. Apparently the
813	* MAC address is not supposed to be checked here.
814	*/
815
816	/** @todo this is not required in the initial implementation, do it later. */
817	debugPrint(1, true, "DECLINE is not implemented");
818	return true;
819	}
820
821
822	/**
823	* The client is releasing its lease - good boy.
824	*
825	* @returns true.
826	*
827	* @param pDhcpMsg The message.
828	* @param cb The message size.
829	*/
830	bool VBoxNetDhcp::handleDhcpReqRelease(PCRTNETBOOTP pDhcpMsg, size_t cb)
831	{
832	/** @todo Probably need to match the server IP here to work correctly with
833	* other servers. */
834
835	/*
836	* The client may pass us option 61, client identifier, which we should
837	* use to find the lease by.
838	*
839	* We're matching MAC address and lease state as well.
840	*/
841
842	/*
843	* If no client identifier or if we couldn't find a lease by using it,
844	* we will try look it up by the client IP address.
845	*/
846
847
848	/*
849	* If found, release it.
850	*/
851
852
853	/** @todo this is not required in the initial implementation, do it later. */
854	debugPrint(1, true, "RELEASE is not implemented");
855	return true;
856	}
857
858
859	/**
860	* Print debug message depending on the m_cVerbosity level.
861	*
862	* @param iMinLevel The minimum m_cVerbosity level for this message.
863	* @param fMsg Whether to dump parts for the current DHCP message.
864	* @param pszFmt The message format string.
865	* @param va Optional arguments.
866	*/
867	void VBoxNetDhcp::debugPrintV(int iMinLevel, bool fMsg, const char *pszFmt, va_list va) const
868	{
869	if (iMinLevel <= m_cVerbosity)
870	{
871	va_list vaCopy; /* This dude is very special, thus the copy. */
872	va_copy(vaCopy, va);
873	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: %s: %N\n", iMinLevel >= 2 ? "debug" : "info", pszFmt, &vaCopy);
874	va_end(vaCopy);
875
876	if ( fMsg
877	&& m_cVerbosity >= 2
878	&& m_pCurMsg)
879	{
880	/* XXX: export this to debugPrinfDhcpMsg or variant and other method export
881	* to base class
882	*/
883	const char *pszMsg = m_uCurMsgType != UINT8_MAX ? debugDhcpName(m_uCurMsgType) : "";
884	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",
885	pszMsg,
886	&m_pCurMsg->bp_chaddr,
887	m_pCurMsg->bp_ciaddr.au8[0], m_pCurMsg->bp_ciaddr.au8[1], m_pCurMsg->bp_ciaddr.au8[2], m_pCurMsg->bp_ciaddr.au8[3],
888	m_pCurMsg->bp_yiaddr.au8[0], m_pCurMsg->bp_yiaddr.au8[1], m_pCurMsg->bp_yiaddr.au8[2], m_pCurMsg->bp_yiaddr.au8[3],
889	m_pCurMsg->bp_siaddr.au8[0], m_pCurMsg->bp_siaddr.au8[1], m_pCurMsg->bp_siaddr.au8[2], m_pCurMsg->bp_siaddr.au8[3],
890	m_pCurMsg->bp_xid);
891	}
892	}
893	}
894
895
896	/**
897	* Gets the name of given DHCP message type.
898	*
899	* @returns Readonly name.
900	* @param uMsgType The message number.
901	*/
902	/* static / const char VBoxNetDhcp::debugDhcpName(uint8_t uMsgType)
903	{
904	switch (uMsgType)
905	{
906	case 0: return "MT_00";
907	case RTNET_DHCP_MT_DISCOVER: return "DISCOVER";
908	case RTNET_DHCP_MT_OFFER: return "OFFER";
909	case RTNET_DHCP_MT_REQUEST: return "REQUEST";
910	case RTNET_DHCP_MT_DECLINE: return "DECLINE";
911	case RTNET_DHCP_MT_ACK: return "ACK";
912	case RTNET_DHCP_MT_NAC: return "NAC";
913	case RTNET_DHCP_MT_RELEASE: return "RELEASE";
914	case RTNET_DHCP_MT_INFORM: return "INFORM";
915	case 9: return "MT_09";
916	case 10: return "MT_0a";
917	case 11: return "MT_0b";
918	case 12: return "MT_0c";
919	case 13: return "MT_0d";
920	case 14: return "MT_0e";
921	case 15: return "MT_0f";
922	case 16: return "MT_10";
923	case 17: return "MT_11";
924	case 18: return "MT_12";
925	case 19: return "MT_13";
926	case UINT8_MAX: return "MT_ff";
927	default: return "UNKNOWN";
928	}
929	}
930
931
932
933	/**
934	* Entry point.
935	*/
936	extern "C" DECLEXPORT(int) TrustedMain(int argc, char argv, char envp)
937	{
938	/*
939	* Instantiate the DHCP server and hand it the options.
940	*/
941	HRESULT hrc = com::Initialize();
942	Assert(!FAILED(hrc));
943
944	VBoxNetDhcp *pDhcp = new VBoxNetDhcp();
945	if (!pDhcp)
946	{
947	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: new VBoxNetDhcp failed!\n");
948	return 1;
949	}
950	int rc = pDhcp->parseArgs(argc - 1, argv + 1);
951	if (rc)
952	return rc;
953
954	pDhcp->init();
955
956	/*
957	* Try connect the server to the network.
958	*/
959	rc = pDhcp->tryGoOnline();
960	if (rc)
961	{
962	delete pDhcp;
963	return rc;
964	}
965
966	/*
967	* Process requests.
968	*/
969	g_pDhcp = pDhcp;
970	rc = pDhcp->run();
971	g_pDhcp = NULL;
972	delete pDhcp;
973
974	return rc;
975	}
976
977
978	#ifndef VBOX_WITH_HARDENING
979
980	int main(int argc, char argv, char envp)
981	{
982	int rc = RTR3InitExe(argc, &argv, RTR3INIT_FLAGS_SUPLIB);
983	if (RT_FAILURE(rc))
984	return RTMsgInitFailure(rc);
985
986	return TrustedMain(argc, argv, envp);
987	}
988
989	# ifdef RT_OS_WINDOWS
990
991	static LRESULT CALLBACK WindowProc(HWND hwnd,
992	UINT uMsg,
993	WPARAM wParam,
994	LPARAM lParam
995	)
996	{
997	if(uMsg == WM_DESTROY)
998	{
999	PostQuitMessage(0);
1000	return 0;
1001	}
1002	return DefWindowProc (hwnd, uMsg, wParam, lParam);
1003	}
1004
1005	static LPCWSTR g_WndClassName = L"VBoxNetDHCPClass";
1006
1007	static DWORD WINAPI MsgThreadProc(__in LPVOID lpParameter)
1008	{
1009	HWND hwnd = 0;
1010	HINSTANCE hInstance = (HINSTANCE)GetModuleHandle (NULL);
1011	bool bExit = false;
1012
1013	/* Register the Window Class. */
1014	WNDCLASS wc;
1015	wc.style = 0;
1016	wc.lpfnWndProc = WindowProc;
1017	wc.cbClsExtra = 0;
1018	wc.cbWndExtra = sizeof(void *);
1019	wc.hInstance = hInstance;
1020	wc.hIcon = NULL;
1021	wc.hCursor = NULL;
1022	wc.hbrBackground = (HBRUSH)(COLOR_BACKGROUND + 1);
1023	wc.lpszMenuName = NULL;
1024	wc.lpszClassName = g_WndClassName;
1025
1026	ATOM atomWindowClass = RegisterClass(&wc);
1027
1028	if (atomWindowClass != 0)
1029	{
1030	/* Create the window. */
1031	hwnd = CreateWindowEx (WS_EX_TOOLWINDOW \| WS_EX_TRANSPARENT \| WS_EX_TOPMOST,
1032	g_WndClassName, g_WndClassName,
1033	WS_POPUPWINDOW,
1034	-200, -200, 100, 100, NULL, NULL, hInstance, NULL);
1035
1036	if (hwnd)
1037	{
1038	SetWindowPos(hwnd, HWND_TOPMOST, -200, -200, 0, 0,
1039	SWP_NOACTIVATE \| SWP_HIDEWINDOW \| SWP_NOCOPYBITS \| SWP_NOREDRAW \| SWP_NOSIZE);
1040
1041	MSG msg;
1042	while (GetMessage(&msg, NULL, 0, 0))
1043	{
1044	TranslateMessage(&msg);
1045	DispatchMessage(&msg);
1046	}
1047
1048	DestroyWindow (hwnd);
1049
1050	bExit = true;
1051	}
1052
1053	UnregisterClass (g_WndClassName, hInstance);
1054	}
1055
1056	if(bExit)
1057	{
1058	/* no need any accuracy here, in anyway the DHCP server usually gets terminated with TerminateProcess */
1059	exit(0);
1060	}
1061
1062	return 0;
1063	}
1064
1065
1066	/** (We don't want a console usually.) */
1067	int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
1068	{
1069	NOREF(hInstance); NOREF(hPrevInstance); NOREF(lpCmdLine); NOREF(nCmdShow);
1070
1071	HANDLE hThread = CreateThread(
1072	NULL, /__in_opt LPSECURITY_ATTRIBUTES lpThreadAttributes, /
1073	0, /__in SIZE_T dwStackSize, /
1074	MsgThreadProc, /__in LPTHREAD_START_ROUTINE lpStartAddress,/
1075	NULL, /__in_opt LPVOID lpParameter,/
1076	0, /__in DWORD dwCreationFlags,/
1077	NULL /__out_opt LPDWORD lpThreadId/
1078	);
1079
1080	if(hThread != NULL)
1081	CloseHandle(hThread);
1082
1083	return main(__argc, __argv, environ);
1084	}
1085	# endif /* RT_OS_WINDOWS */
1086
1087	#endif /* !VBOX_WITH_HARDENING */
1088

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source: vbox/trunk/src/VBox/NetworkServices/DHCP/VBoxNetDHCP.cpp@ 48401

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