VBoxNetDHCP.cpp@ 17883

Last change on this file since 17883 was 17864, checked in by vboxsync, 16 years ago
VBoxNetDHCP: A couple of more options for configuring the trunk.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 62.9 KB

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1	/* $Id: VBoxNetDHCP.cpp 17864 2009-03-13 23:04:21Z vboxsync $ */
2	/** @file
3	* VBoxNetDHCP - DHCP Service for connecting to IntNet.
4	*/
5
6	/*
7	* Copyright (C) 2009 Sun Microsystems, Inc.
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	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22	/** @page pg_net_dhcp VBoxNetDHCP
23	*
24	* Write a few words...
25	*
26	*/
27
28	/*******************************************************************************
29	* Header Files *
30	*******************************************************************************/
31	#include <iprt/net.h>
32	#include <iprt/initterm.h>
33	#include <iprt/alloca.h>
34	#include <iprt/err.h>
35	#include <iprt/time.h>
36	#include <iprt/stream.h>
37	#include <iprt/path.h>
38	#include <iprt/param.h>
39	#include <iprt/getopt.h>
40	#include <iprt/string.h>
41
42	#include <VBox/sup.h>
43	#include <VBox/intnet.h>
44	#include <VBox/vmm.h>
45	#include <VBox/version.h>
46
47	#include "../NetLib/VBoxNetLib.h"
48
49	#include <vector>
50	#include <string>
51
52
53	/*******************************************************************************
54	* Structures and Typedefs *
55	*******************************************************************************/
56
57	/**
58	* DHCP configuration item.
59	*
60	* This is all public data because I'm too lazy to do it propertly right now.
61	*/
62	class VBoxNetDhcpCfg
63	{
64	public:
65	/** The etheret addresses this matches config applies to.
66	* An empty vector means 'ANY'. */
67	std::vector<RTMAC> m_MacAddresses;
68	/** The upper address in the range. */
69	RTNETADDRIPV4 m_UpperAddr;
70	/** The lower address in the range. */
71	RTNETADDRIPV4 m_LowerAddr;
72
73	/** Option 1: The net mask. */
74	RTNETADDRIPV4 m_SubnetMask;
75	/* * Option 2: The time offset. */
76	/** Option 3: Routers for the subnet. */
77	std::vector<RTNETADDRIPV4> m_Routers;
78	/* * Option 4: Time server. */
79	/* * Option 5: Name server. */
80	/** Option 6: Domain Name Server (DNS) */
81	std::vector<RTNETADDRIPV4> m_DNSes;
82	/* * Option 7: Log server. */
83	/* * Option 8: Cookie server. */
84	/* * Option 9: LPR server. */
85	/* * Option 10: Impress server. */
86	/* * Option 11: Resource location server. */
87	/* * Option 12: Host name. */
88	std::string m_HostName;
89	/* * Option 13: Boot file size option. */
90	/* * Option 14: Merit dump file. */
91	/** Option 15: Domain name. */
92	std::string m_DomainName;
93	/* * Option 16: Swap server. */
94	/* * Option 17: Root path. */
95	/* * Option 18: Extension path. */
96	/* * Option 19: IP forwarding enable/disable. */
97	/* * Option 20: Non-local routing enable/disable. */
98	/* * Option 21: Policy filter. */
99	/* * Option 22: Maximum datagram reassembly size (MRS). */
100	/* * Option 23: Default IP time-to-live. */
101	/* * Option 24: Path MTU aging timeout. */
102	/* * Option 25: Path MTU plateau table. */
103	/* * Option 26: Interface MTU. */
104	/* * Option 27: All subnets are local. */
105	/* * Option 28: Broadcast address. */
106	/* * Option 29: Perform maximum discovery. */
107	/* * Option 30: Mask supplier. */
108	/* * Option 31: Perform route discovery. */
109	/* * Option 32: Router solicitation address. */
110	/* * Option 33: Static route. */
111	/* * Option 34: Trailer encapsulation. */
112	/* * Option 35: ARP cache timeout. */
113	/* * Option 36: Ethernet encapsulation. */
114	/* * Option 37: TCP Default TTL. */
115	/* * Option 38: TCP Keepalive Interval. */
116	/* * Option 39: TCP Keepalive Garbage. */
117	/* * Option 40: Network Information Service (NIS) Domain. */
118	/* * Option 41: Network Information Servers. */
119	/* * Option 42: Network Time Protocol Servers. */
120	/* * Option 43: Vendor Specific Information. */
121	/* * Option 44: NetBIOS over TCP/IP Name Server (NBNS). */
122	/* * Option 45: NetBIOS over TCP/IP Datagram distribution Server (NBDD). */
123	/* * Option 46: NetBIOS over TCP/IP Node Type. */
124	/* * Option 47: NetBIOS over TCP/IP Scope. */
125	/* * Option 48: X Window System Font Server. */
126	/* * Option 49: X Window System Display Manager. */
127
128	/** Option 51: IP Address Lease Time. */
129	uint32_t m_cSecLease;
130
131	/* * Option 64: Network Information Service+ Domain. */
132	/* * Option 65: Network Information Service+ Servers. */
133	/** Option 66: TFTP server name. */
134	std::string m_TftpServer;
135	/** Address for the bp_siaddr field corresponding to m_TftpServer. */
136	RTNETADDRIPV4 m_TftpServerAddr;
137	/** Option 67: Bootfile name. */
138	std::string m_BootfileName;
139
140	/* * Option 68: Mobile IP Home Agent. */
141	/* * Option 69: Simple Mail Transport Protocol (SMPT) Server. */
142	/* * Option 70: Post Office Protocol (POP3) Server. */
143	/* * Option 71: Network News Transport Protocol (NNTP) Server. */
144	/* * Option 72: Default World Wide Web (WWW) Server. */
145	/* * Option 73: Default Finger Server. */
146	/* * Option 74: Default Internet Relay Chat (IRC) Server. */
147	/* * Option 75: StreetTalk Server. */
148
149	/* * Option 119: Domain Search. */
150
151
152	VBoxNetDhcpCfg()
153	{
154	m_UpperAddr.u = UINT32_MAX;
155	m_LowerAddr.u = UINT32_MAX;
156	m_SubnetMask.u = UINT32_MAX;
157	m_cSecLease = 6060; / 1 hour */
158	}
159
160	/** Validates the configuration.
161	* @returns 0 on success, exit code + error message to stderr on failure. */
162	int validate(void)
163	{
164	if ( m_UpperAddr.u == UINT32_MAX
165	\|\| m_LowerAddr.u == UINT32_MAX
166	\|\| m_SubnetMask.u == UINT32_MAX)
167	{
168	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: Config is missing:");
169	if (m_UpperAddr.u == UINT32_MAX)
170	RTStrmPrintf(g_pStdErr, " --upper-ip");
171	if (m_LowerAddr.u == UINT32_MAX)
172	RTStrmPrintf(g_pStdErr, " --lower-ip");
173	if (m_SubnetMask.u == UINT32_MAX)
174	RTStrmPrintf(g_pStdErr, " --netmask");
175	return 2;
176	}
177
178	if (RT_N2H_U32(m_UpperAddr.u) < RT_N2H_U32(m_LowerAddr.u))
179	{
180	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: The --upper-ip value is lower than the --lower-ip one!\n"
181	" %d.%d.%d.%d < %d.%d.%d.%d\n",
182	m_UpperAddr.au8[0], m_UpperAddr.au8[1], m_UpperAddr.au8[2], m_UpperAddr.au8[3],
183	m_LowerAddr.au8[0], m_LowerAddr.au8[1], m_LowerAddr.au8[2], m_LowerAddr.au8[3]);
184	return 3;
185	}
186
187	/* the code goes insane if we have too many atm. lazy bird */
188	uint32_t cIPs = RT_N2H_U32(m_UpperAddr.u) - RT_N2H_U32(m_LowerAddr.u);
189	if (cIPs > 1024)
190	{
191	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: Too many IPs between --upper-ip and --lower-ip! %d (max 1024)\n"
192	" %d.%d.%d.%d < %d.%d.%d.%d\n",
193	cIPs,
194	m_UpperAddr.au8[0], m_UpperAddr.au8[1], m_UpperAddr.au8[2], m_UpperAddr.au8[3],
195	m_LowerAddr.au8[0], m_LowerAddr.au8[1], m_LowerAddr.au8[2], m_LowerAddr.au8[3]);
196	return 3;
197	}
198	return 0;
199	}
200
201	/**
202	* Is this config for one specific client?
203	*
204	* @return true / false.
205	*/
206	bool isOneSpecificClient(void) const
207	{
208	return m_LowerAddr.u == m_UpperAddr.u
209	&& m_MacAddresses.size() > 0;
210	}
211
212	/**
213	* Checks if this config matches the specified MAC address.
214	*
215	* @returns true / false.
216	*
217	* @param pMac The MAC address to match.
218	*/
219	bool matchesMacAddress(PCRTMAC pMac) const
220	{
221	size_t i = m_MacAddresses.size();
222	if (RT_LIKELY(i < 1))
223	return true; /* no entries == ALL wildcard match */
224
225	while (i--)
226	{
227	PCRTMAC pCur = &m_MacAddresses[i];
228	if ( pCur->au16[0] == pMac->au16[0]
229	&& pCur->au16[1] == pMac->au16[1]
230	&& pCur->au16[2] == pMac->au16[2])
231	return true;
232	}
233	return false;
234	}
235
236	};
237
238	/**
239	* DHCP lease.
240	*/
241	class VBoxNetDhcpLease
242	{
243	public:
244	typedef enum State
245	{
246	/** Invalid. */
247	kState_Invalid = 0,
248	/** The lease is free / released. */
249	kState_Free,
250	/** An offer has been made.
251	* Expire time indicates when the offer expires. */
252	kState_Offer,
253	/** The lease is active.
254	* Expire time indicates when the lease expires. */
255	kState_Active
256	} State;
257
258	/** The client MAC address. */
259	RTMAC m_MacAddress;
260	/** The IPv4 address. */
261	RTNETADDRIPV4 m_IPv4Address;
262
263	/** The current lease state. */
264	State m_enmState;
265	/** The lease expiration time. */
266	RTTIMESPEC m_ExpireTime;
267	/** Transaction ID. */
268	uint32_t m_xid;
269	/** The configuration for this lease. */
270	VBoxNetDhcpCfg *m_pCfg;
271
272	public:
273	/** Constructor taking an IPv4 address and a Config. */
274	VBoxNetDhcpLease(RTNETADDRIPV4 IPv4Addr, VBoxNetDhcpCfg *pCfg)
275	{
276	m_pCfg = pCfg;
277	m_IPv4Address = IPv4Addr;
278
279	m_MacAddress.au16[0] = m_MacAddress.au16[1] = m_MacAddress.au16[2] = 0xff;
280	m_enmState = kState_Free;
281	RTTimeSpecSetSeconds(&m_ExpireTime, 0);
282	m_xid = UINT32_MAX;
283	}
284
285	/** Destructor. */
286	~VBoxNetDhcpLease()
287	{
288	m_IPv4Address.u = UINT32_MAX;
289	m_pCfg = NULL;
290	m_MacAddress.au16[0] = m_MacAddress.au16[1] = m_MacAddress.au16[2] = 0xff;
291	m_enmState = kState_Free;
292	m_xid = UINT32_MAX;
293	}
294
295	void offer(uint32_t xid);
296	void activate(void);
297	void activate(uint32_t xid);
298	void release(void);
299	bool hasExpired(void) const;
300
301	/**
302	* Checks if the lease is in use or not.
303	*
304	* @returns true if active, false if free or expired.
305	*
306	* @param pNow The current time to use. Optional.
307	*/
308	bool isInUse(PCRTTIMESPEC pNow = NULL) const
309	{
310	if ( m_enmState == kState_Offer
311	\|\| m_enmState == kState_Active)
312	{
313	RTTIMESPEC Now;
314	if (!pNow)
315	pNow = RTTimeNow(&Now);
316	return RTTimeSpecGetSeconds(&m_ExpireTime) > RTTimeSpecGetSeconds(pNow);
317	}
318	return false;
319	}
320
321	/**
322	* Is this lease for one specific client?
323	*
324	* @return true/false.
325	*/
326	bool isOneSpecificClient(void) const
327	{
328	return m_pCfg
329	&& m_pCfg->isOneSpecificClient();
330	}
331
332	/**
333	* Is this lease currently being offered to a client.
334	*
335	* @returns true / false.
336	*/
337	bool isBeingOffered(void) const
338	{
339	return m_enmState == kState_Offer
340	&& isInUse();
341	}
342
343	/**
344	* Is the lease in the current config or not.
345	*
346	* When updating the config we might leave active leases behind which aren't
347	* included in the new config. These will have m_pCfg set to NULL and should be
348	* freed up when they expired.
349	*
350	* @returns true / false.
351	*/
352	bool isInCurrentConfig(void) const
353	{
354	return m_pCfg != NULL;
355	}
356	};
357
358	/**
359	* DHCP server instance.
360	*/
361	class VBoxNetDhcp
362	{
363	public:
364	VBoxNetDhcp();
365	virtual ~VBoxNetDhcp();
366
367	int parseArgs(int argc, char **argv);
368	int tryGoOnline(void);
369	int run(void);
370
371	protected:
372	int addConfig(VBoxNetDhcpCfg *pCfg);
373	void explodeConfig(void);
374
375	bool handleDhcpMsg(uint8_t uMsgType, PCRTNETBOOTP pDhcpMsg, size_t cb);
376	bool handleDhcpReqDiscover(PCRTNETBOOTP pDhcpMsg, size_t cb);
377	bool handleDhcpReqRequest(PCRTNETBOOTP pDhcpMsg, size_t cb);
378	bool handleDhcpReqDecline(PCRTNETBOOTP pDhcpMsg, size_t cb);
379	bool handleDhcpReqRelease(PCRTNETBOOTP pDhcpMsg, size_t cb);
380	void makeDhcpReply(uint8_t uMsgType, VBoxNetDhcpLease *pLease, PCRTNETBOOTP pDhcpMsg, size_t cb);
381
382	VBoxNetDhcpLease *findLeaseByMacAddress(PCRTMAC pMacAddress, bool fAnyState);
383	VBoxNetDhcpLease *findLeaseByIpv4AndMacAddresses(RTNETADDRIPV4 IPv4Addr, PCRTMAC pMacAddress, bool fAnyState);
384	VBoxNetDhcpLease *newLease(PCRTNETBOOTP pDhcpMsg, size_t cb);
385
386	static uint8_t const findOption(uint8_t uOption, PCRTNETBOOTP pDhcpMsg, size_t cb, size_t pcbMaxOpt);
387	static bool findOptionIPv4Addr(uint8_t uOption, PCRTNETBOOTP pDhcpMsg, size_t cb, PRTNETADDRIPV4 pIPv4Addr);
388
389	inline void debugPrint( int32_t iMinLevel, bool fMsg, const char *pszFmt, ...) const;
390	void debugPrintV(int32_t iMinLevel, bool fMsg, const char *pszFmt, va_list va) const;
391	static const char *debugDhcpName(uint8_t uMsgType);
392
393	protected:
394	/** @name The server configuration data members.
395	* @{ */
396	std::string m_Name;
397	std::string m_Network;
398	std::string m_TrunkName;
399	INTNETTRUNKTYPE m_enmTrunkType;
400	RTMAC m_MacAddress;
401	RTNETADDRIPV4 m_Ipv4Address;
402	std::string m_LeaseDBName;
403	/** @} */
404
405	/** The current configs. */
406	std::vector<VBoxNetDhcpCfg *> m_Cfgs;
407
408	/** The current leases. */
409	std::vector<VBoxNetDhcpLease> m_Leases;
410
411	/** @name The network interface
412	* @{ */
413	PSUPDRVSESSION m_pSession;
414	uint32_t m_cbSendBuf;
415	uint32_t m_cbRecvBuf;
416	INTNETIFHANDLE m_hIf; /*< The handle to the network interface. /
417	PINTNETBUF m_pIfBuf; /*< Interface buffer. /
418	/** @} */
419
420	/** @name Debug stuff
421	* @{ */
422	int32_t m_cVerbosity;
423	uint8_t m_uCurMsgType;
424	uint16_t m_cbCurMsg;
425	PCRTNETBOOTP m_pCurMsg;
426	VBOXNETUDPHDRS m_CurHdrs;
427	/** @} */
428	};
429
430
431	/*******************************************************************************
432	* Global Variables *
433	*******************************************************************************/
434	/** Pointer to the DHCP server. */
435	static VBoxNetDhcp *g_pDhcp;
436
437
438	/**
439	* Offer this lease to a client.
440	*
441	* @param xid The transaction ID.
442	*/
443	void VBoxNetDhcpLease::offer(uint32_t xid)
444	{
445	m_enmState = kState_Offer;
446	m_xid = xid;
447	RTTimeNow(&m_ExpireTime);
448	RTTimeSpecAddSeconds(&m_ExpireTime, 60);
449	}
450
451
452	/**
453	* Activate this lease (i.e. a client is now using it).
454	*/
455	void VBoxNetDhcpLease::activate(void)
456	{
457	m_enmState = kState_Active;
458	RTTimeNow(&m_ExpireTime);
459	RTTimeSpecAddSeconds(&m_ExpireTime, m_pCfg ? m_pCfg->m_cSecLease : 60); /* m_pCfg can be NULL right now... */
460	}
461
462
463	/**
464	* Activate this lease with a new transaction ID.
465	*
466	* @param xid The transaction ID.
467	* @todo check if this is really necessary.
468	*/
469	void VBoxNetDhcpLease::activate(uint32_t xid)
470	{
471	activate();
472	m_xid = xid;
473	}
474
475
476	/**
477	* Release a lease either upon client request or because it didn't quite match a
478	* DHCP_REQUEST.
479	*/
480	void VBoxNetDhcpLease::release(void)
481	{
482	m_enmState = kState_Free;
483	RTTimeNow(&m_ExpireTime);
484	RTTimeSpecAddSeconds(&m_ExpireTime, 5);
485	}
486
487
488	/**
489	* Checks if the lease has expired or not.
490	*
491	* This just checks the expiration time not the state. This is so that this
492	* method will work for reusing RELEASEd leases when the client comes back after
493	* a reboot or ipconfig /renew. Callers not interested in info on released
494	* leases should check the state first.
495	*
496	* @returns true if expired, false if not.
497	*/
498	bool VBoxNetDhcpLease::hasExpired() const
499	{
500	RTTIMESPEC Now;
501	return RTTimeSpecGetSeconds(&m_ExpireTime) > RTTimeSpecGetSeconds(RTTimeNow(&Now));
502	}
503
504
505
506
507	/**
508	* Construct a DHCP server with a default configuration.
509	*/
510	VBoxNetDhcp::VBoxNetDhcp()
511	{
512	m_Name = "VBoxNetDhcp";
513	m_Network = "VBoxNetDhcp";
514	m_TrunkName = "";
515	m_enmTrunkType = kIntNetTrunkType_WhateverNone;
516	m_MacAddress.au8[0] = 0x08;
517	m_MacAddress.au8[1] = 0x00;
518	m_MacAddress.au8[2] = 0x27;
519	m_MacAddress.au8[3] = 0x40;
520	m_MacAddress.au8[4] = 0x41;
521	m_MacAddress.au8[5] = 0x42;
522	m_Ipv4Address.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2, 5)));
523
524	m_pSession = NIL_RTR0PTR;
525	m_cbSendBuf = 8192;
526	m_cbRecvBuf = 51200; /** @todo tune to 64 KB with help from SrvIntR0 */
527	m_hIf = INTNET_HANDLE_INVALID;
528	m_pIfBuf = NULL;
529
530	m_cVerbosity = 0;
531	m_uCurMsgType = UINT8_MAX;
532	m_cbCurMsg = 0;
533	m_pCurMsg = NULL;
534	memset(&m_CurHdrs, '\0', sizeof(m_CurHdrs));
535
536	#if 0 /* enable to hack the code without a mile long argument list. */
537	VBoxNetDhcpCfg *pDefCfg = new VBoxNetDhcpCfg();
538	pDefCfg->m_LowerAddr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2,100)));
539	pDefCfg->m_UpperAddr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2,250)));
540	pDefCfg->m_SubnetMask.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8(255,255,255, 0)));
541	RTNETADDRIPV4 Addr;
542	Addr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2, 1)));
543	pDefCfg->m_Routers.push_back(Addr);
544	Addr.u = RT_H2N_U32_C(RT_BSWAP_U32_C(RT_MAKE_U32_FROM_U8( 10, 0, 2, 2)));
545	pDefCfg->m_DNSes.push_back(Addr);
546	pDefCfg->m_DomainName = "vboxnetdhcp.org";
547	#if 0
548	pDefCfg->m_cSecLease = 6060; / 1 hour */
549	#else
550	pDefCfg->m_cSecLease = 30; /* sec */
551	#endif
552	pDefCfg->m_TftpServer = "10.0.2.3"; //??
553	this->addConfig(pDefCfg);
554	#endif
555	}
556
557
558	/**
559	* Destruct a DHCP server.
560	*/
561	VBoxNetDhcp::~VBoxNetDhcp()
562	{
563	/*
564	* Close the interface connection.
565	*/
566	if (m_hIf != INTNET_HANDLE_INVALID)
567	{
568	INTNETIFCLOSEREQ CloseReq;
569	CloseReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
570	CloseReq.Hdr.cbReq = sizeof(CloseReq);
571	CloseReq.pSession = m_pSession;
572	CloseReq.hIf = m_hIf;
573	m_hIf = INTNET_HANDLE_INVALID;
574	int rc = SUPCallVMMR0Ex(NIL_RTR0PTR, VMMR0_DO_INTNET_IF_CLOSE, 0, &CloseReq.Hdr);
575	AssertRC(rc);
576	}
577
578	if (m_pSession)
579	{
580	SUPTerm(false /* not forced */);
581	m_pSession = NIL_RTR0PTR;
582	}
583	}
584
585
586	/**
587	* Adds a config to the tail.
588	*
589	* @returns See VBoxNetDHCP::validate().
590	* @param pCfg The config too add.
591	* This object will be consumed by this call!
592	*/
593	int VBoxNetDhcp::addConfig(VBoxNetDhcpCfg *pCfg)
594	{
595	int rc = 0;
596	if (pCfg)
597	{
598	rc = pCfg->validate();
599	if (!rc)
600	m_Cfgs.push_back(pCfg);
601	else
602	delete pCfg;
603	}
604	return rc;
605	}
606
607
608	/**
609	* Explodes the config into leases.
610	*
611	* @remarks This code is brute force and not very fast nor memory efficient.
612	* We will have to revisit this later.
613	*
614	* @remarks If an IP has been reconfigured for a fixed mac address and it's
615	* already leased to a client, we it won't be available until the
616	* client releases its lease or it expires.
617	*/
618	void VBoxNetDhcp::explodeConfig(void)
619	{
620	RTTIMESPEC Now;
621	RTTimeNow(&Now);
622
623	/*
624	* Remove all non-active leases from the vector and zapping the
625	* config pointers of the once left behind.
626	*/
627	std::vector<VBoxNetDhcpLease>::iterator Itr = m_Leases.begin();
628	while (Itr != m_Leases.end())
629	{
630	if (!Itr->isInUse(&Now))
631	Itr = m_Leases.erase(Itr);
632	else
633	{
634	Itr->m_pCfg = NULL;
635	Itr++;
636	}
637	}
638
639	/*
640	* Loop thru the configurations in reverse order, giving the last
641	* configs priority of the newer ones.
642	*/
643	size_t iCfg = m_Cfgs.size();
644	while (iCfg-- > 0)
645	{
646	VBoxNetDhcpCfg *pCfg = m_Cfgs[iCfg];
647
648	/* Expand the IP lease range. */
649	uint32_t const uEnd = RT_N2H_U32(pCfg->m_UpperAddr.u);
650	for (uint32_t i = RT_N2H_U32(pCfg->m_LowerAddr.u); i < uEnd; i++)
651	{
652	RTNETADDRIPV4 IPv4Addr;
653	IPv4Addr.u = RT_H2N_U32(i);
654
655	/* Check if it exists and is configured. */
656	VBoxNetDhcpLease *pLease = NULL;
657	for (size_t i = 0; i < m_Leases.size(); i++)
658	if (m_Leases[i].m_IPv4Address.u == IPv4Addr.u)
659	{
660	pLease = &m_Leases[i];
661	break;
662	}
663	if (pLease)
664	{
665	if (!pLease->m_pCfg)
666	pLease->m_pCfg = pCfg;
667	}
668	else
669	{
670	/* add it. */
671	VBoxNetDhcpLease NewLease(IPv4Addr, pCfg);
672	m_Leases.push_back(NewLease);
673	debugPrint(10, false, "exploseConfig: new lease %d.%d.%d.%d",
674	IPv4Addr.au8[0], IPv4Addr.au8[1], IPv4Addr.au8[2], IPv4Addr.au8[3]);
675	}
676	}
677	}
678	}
679
680
681	/**
682	* Parse the arguments.
683	*
684	* @returns 0 on success, fully bitched exit code on failure.
685	*
686	* @param argc Argument count.
687	* @param argv Argument vector.
688	*/
689	int VBoxNetDhcp::parseArgs(int argc, char **argv)
690	{
691	static const RTGETOPTDEF s_aOptionDefs[] =
692	{
693	{ "--name", 'N', RTGETOPT_REQ_STRING },
694	{ "--network", 'n', RTGETOPT_REQ_STRING },
695	{ "--trunk-name", 't', RTGETOPT_REQ_STRING },
696	{ "--trunk-type", 'T', RTGETOPT_REQ_STRING },
697	{ "--mac-address", 'a', RTGETOPT_REQ_MACADDR },
698	{ "--ip-address", 'i', RTGETOPT_REQ_IPV4ADDR },
699	{ "--lease-db", 'D', RTGETOPT_REQ_STRING },
700	{ "--verbose", 'v', RTGETOPT_REQ_NOTHING },
701
702	{ "--begin-config", 'b', RTGETOPT_REQ_NOTHING },
703	{ "--gateway", 'g', RTGETOPT_REQ_IPV4ADDR },
704	{ "--lower-ip", 'l', RTGETOPT_REQ_IPV4ADDR },
705	{ "--upper-ip", 'u', RTGETOPT_REQ_IPV4ADDR },
706	{ "--netmask", 'm', RTGETOPT_REQ_IPV4ADDR },
707
708	{ "--help", 'h', RTGETOPT_REQ_NOTHING },
709	{ "--version ", 'V', RTGETOPT_REQ_NOTHING },
710	};
711
712	RTGETOPTSTATE State;
713	int rc = RTGetOptInit(&State, argc, argv, &s_aOptionDefs[0], RT_ELEMENTS(s_aOptionDefs), 0, 0);
714	AssertRCReturn(rc, 49);
715
716	VBoxNetDhcpCfg *pCurCfg = NULL;
717	for (;;)
718	{
719	RTGETOPTUNION Val;
720	rc = RTGetOpt(&State, &Val);
721	if (!rc)
722	break;
723	switch (rc)
724	{
725	case 'N':
726	m_Name = Val.psz;
727	break;
728	case 'n':
729	m_Network = Val.psz;
730	break;
731	case 't':
732	m_TrunkName = Val.psz;
733	break;
734	case 'T':
735	if (!strcmp(Val.psz, "whatever"))
736	m_enmTrunkType = kIntNetTrunkType_WhateverNone;
737	else if (!strcmp(Val.psz, "netflt"))
738	m_enmTrunkType = kIntNetTrunkType_NetFlt;
739	else if (!strcmp(Val.psz, "netadp"))
740	m_enmTrunkType = kIntNetTrunkType_NetAdp;
741	else if (!strcmp(Val.psz, "srvnat"))
742	m_enmTrunkType = kIntNetTrunkType_SrvNat;
743	else
744	{
745	RTStrmPrintf(g_pStdErr, "Invalid trunk type '%s'\n", Val.psz);
746	return 1;
747	}
748	break;
749	case 'a':
750	m_MacAddress = Val.MacAddr;
751	break;
752	case 'i':
753	m_Ipv4Address = Val.IPv4Addr;
754	break;
755	case 'd':
756	m_LeaseDBName = Val.psz;
757	break;
758
759	case 'v':
760	m_cVerbosity++;
761	break;
762
763	/* Begin config. */
764	case 'b':
765	rc = addConfig(pCurCfg);
766	if (rc)
767	break;
768	pCurCfg = NULL;
769	/* fall thru */
770
771	/* config specific ones. */
772	case 'g':
773	case 'l':
774	case 'u':
775	case 'm':
776	if (!pCurCfg)
777	{
778	pCurCfg = new VBoxNetDhcpCfg();
779	if (!pCurCfg)
780	{
781	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: new VBoxDhcpCfg failed\n");
782	return 1;
783	}
784	}
785
786	switch (rc)
787	{
788	case 'g':
789	pCurCfg->m_Routers.push_back(Val.IPv4Addr);
790	break;
791
792	case 'l':
793	pCurCfg->m_LowerAddr = Val.IPv4Addr;
794	break;
795
796	case 'u':
797	pCurCfg->m_UpperAddr = Val.IPv4Addr;
798	break;
799
800	case 'm':
801	pCurCfg->m_SubnetMask = Val.IPv4Addr;
802	break;
803
804	case 0: /* ignore */ break;
805	default:
806	AssertMsgFailed(("%d", rc));
807	return 1;
808	}
809	break;
810
811	case 'V':
812	RTPrintf("%sr%d\n", VBOX_VERSION_STRING, VBOX_SVN_REV);
813	return 0;
814
815	case 'h':
816	RTPrintf("VBoxNetDHCP Version %s\n"
817	"(C) 2009 Sun Microsystems, Inc.\n"
818	"All rights reserved\n"
819	"\n"
820	"Usage: VBoxNetDHCP <options>\n"
821	"\n"
822	"Options:\n"
823	VBOX_VERSION_STRING);
824	for (size_t i = 0; i < RT_ELEMENTS(s_aOptionDefs); i++)
825	RTPrintf(" -%c, %s\n", s_aOptionDefs[i].iShort, s_aOptionDefs[i].pszLong);
826	return 1;
827
828	default:
829	break;
830	}
831	}
832
833	/*
834	* Do the reconfig. (move this later)
835	*/
836	if (!rc)
837	explodeConfig();
838
839	return rc;
840	}
841
842
843	/**
844	* Tries to connect to the internal network.
845	*
846	* @returns 0 on success, exit code + error message to stderr on failure.
847	*/
848	int VBoxNetDhcp::tryGoOnline(void)
849	{
850	/*
851	* Open the session, load ring-0 and issue the request.
852	*/
853	int rc = SUPR3Init(&m_pSession);
854	if (RT_FAILURE(rc))
855	{
856	m_pSession = NIL_RTR0PTR;
857	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: SUPR3Init -> %Rrc", rc);
858	return 1;
859	}
860
861	char szPath[RTPATH_MAX];
862	rc = RTPathProgram(szPath, sizeof(szPath) - sizeof("/VMMR0.r0"));
863	if (RT_FAILURE(rc))
864	{
865	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: RTPathProgram -> %Rrc", rc);
866	return 1;
867	}
868
869	rc = SUPLoadVMM(strcat(szPath, "/VMMR0.r0"));
870	if (RT_FAILURE(rc))
871	{
872	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: SUPLoadVMM(\"%s\") -> %Rrc", szPath, rc);
873	return 1;
874	}
875
876	/*
877	* Create the open request.
878	*/
879	INTNETOPENREQ OpenReq;
880	OpenReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
881	OpenReq.Hdr.cbReq = sizeof(OpenReq);
882	OpenReq.pSession = m_pSession;
883	strncpy(OpenReq.szNetwork, m_Network.c_str(), sizeof(OpenReq.szNetwork));
884	OpenReq.szNetwork[sizeof(OpenReq.szNetwork) - 1] = '\0';
885	strncpy(OpenReq.szTrunk, m_TrunkName.c_str(), sizeof(OpenReq.szTrunk));
886	OpenReq.szTrunk[sizeof(OpenReq.szTrunk) - 1] = '\0';
887	OpenReq.enmTrunkType = m_enmTrunkType;
888	OpenReq.fFlags = 0; /** @todo check this */
889	OpenReq.cbSend = m_cbSendBuf;
890	OpenReq.cbRecv = m_cbRecvBuf;
891	OpenReq.hIf = INTNET_HANDLE_INVALID;
892
893	/*
894	* Issue the request.
895	*/
896	debugPrint(2, false, "attempting to open/create network \"%s\"...", OpenReq.szNetwork);
897	rc = SUPCallVMMR0Ex(NIL_RTR0PTR, VMMR0_DO_INTNET_OPEN, 0, &OpenReq.Hdr);
898	if (RT_SUCCESS(rc))
899	{
900	m_hIf = OpenReq.hIf;
901	debugPrint(1, false, "successfully opened/created \"%s\" - hIf=%#x", OpenReq.szNetwork, m_hIf);
902
903	/*
904	* Get the ring-3 address of the shared interface buffer.
905	*/
906	INTNETIFGETRING3BUFFERREQ GetRing3BufferReq;
907	GetRing3BufferReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
908	GetRing3BufferReq.Hdr.cbReq = sizeof(GetRing3BufferReq);
909	GetRing3BufferReq.pSession = m_pSession;
910	GetRing3BufferReq.hIf = m_hIf;
911	GetRing3BufferReq.pRing3Buf = NULL;
912	rc = SUPCallVMMR0Ex(NIL_RTR0PTR, VMMR0_DO_INTNET_IF_GET_RING3_BUFFER, 0, &GetRing3BufferReq.Hdr);
913	if (RT_SUCCESS(rc))
914	{
915	PINTNETBUF pBuf = GetRing3BufferReq.pRing3Buf;
916	debugPrint(1, false, "pBuf=%p cbBuf=%d cbSend=%d cbRecv=%d",
917	pBuf, pBuf->cbBuf, pBuf->cbSend, pBuf->cbRecv);
918	m_pIfBuf = pBuf;
919
920	/*
921	* Activate the interface.
922	*/
923	INTNETIFSETACTIVEREQ ActiveReq;
924	ActiveReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
925	ActiveReq.Hdr.cbReq = sizeof(ActiveReq);
926	ActiveReq.pSession = m_pSession;
927	ActiveReq.hIf = m_hIf;
928	ActiveReq.fActive = true;
929	rc = SUPCallVMMR0Ex(NIL_RTR0PTR, VMMR0_DO_INTNET_IF_SET_ACTIVE, 0, &ActiveReq.Hdr);
930	if (RT_SUCCESS(rc))
931	return 0;
932
933	/* bail out */
934	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: SUPCallVMMR0Ex(,VMMR0_DO_INTNET_IF_SET_PROMISCUOUS_MODE,) failed, rc=%Rrc\n", rc);
935	}
936	else
937	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: SUPCallVMMR0Ex(,VMMR0_DO_INTNET_IF_GET_RING3_BUFFER,) failed, rc=%Rrc\n", rc);
938	}
939	else
940	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: SUPCallVMMR0Ex(,VMMR0_DO_INTNET_OPEN,) failed, rc=%Rrc\n", rc);
941
942	return RT_SUCCESS(rc) ? 0 : 1;
943	}
944
945
946	/**
947	* Runs the DHCP server.
948	*
949	* @returns exit code + error message to stderr on failure, won't return on
950	* success (you must kill this process).
951	*/
952	int VBoxNetDhcp::run(void)
953	{
954	/*
955	* The loop.
956	*/
957	PINTNETRINGBUF pRingBuf = &m_pIfBuf->Recv;
958	for (;;)
959	{
960	/*
961	* Wait for a packet to become available.
962	*/
963	INTNETIFWAITREQ WaitReq;
964	WaitReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
965	WaitReq.Hdr.cbReq = sizeof(WaitReq);
966	WaitReq.pSession = m_pSession;
967	WaitReq.hIf = m_hIf;
968	WaitReq.cMillies = 2000; /* 2 secs - the sleep is for some reason uninterruptible... / /* @todo fix interruptability in SrvIntNet! */
969	int rc = SUPCallVMMR0Ex(NIL_RTR0PTR, VMMR0_DO_INTNET_IF_WAIT, 0, &WaitReq.Hdr);
970	if (RT_FAILURE(rc))
971	{
972	if (rc == VERR_TIMEOUT)
973	continue;
974	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: VMMR0_DO_INTNET_IF_WAIT returned %Rrc\n", rc);
975	return 1;
976	}
977
978	/*
979	* Process the receive buffer.
980	*/
981	while (INTNETRingGetReadable(pRingBuf) > 0)
982	{
983	size_t cb;
984	void *pv = VBoxNetUDPMatch(m_pIfBuf, RTNETIPV4_PORT_BOOTPS, &m_MacAddress,
985	VBOXNETUDP_MATCH_UNICAST \| VBOXNETUDP_MATCH_BROADCAST \| VBOXNETUDP_MATCH_CHECKSUM
986	\| (m_cVerbosity > 2 ? VBOXNETUDP_MATCH_PRINT_STDERR : 0),
987	&m_CurHdrs, &cb);
988	if (pv && cb)
989	{
990	PCRTNETBOOTP pDhcpMsg = (PCRTNETBOOTP)pv;
991	m_pCurMsg = pDhcpMsg;
992	m_cbCurMsg = cb;
993
994	uint8_t uMsgType;
995	if (RTNetIPv4IsDHCPValid(NULL /* why is this here? */, pDhcpMsg, cb, &uMsgType))
996	{
997	m_uCurMsgType = uMsgType;
998	handleDhcpMsg(uMsgType, pDhcpMsg, cb);
999	m_uCurMsgType = UINT8_MAX;
1000	}
1001	else
1002	debugPrint(1, true, "VBoxNetDHCP: Skipping invalid DHCP packet.\n"); /** @todo handle pure bootp clients too? */
1003
1004	m_pCurMsg = NULL;
1005	m_cbCurMsg = 0;
1006	}
1007	else if (VBoxNetArpHandleIt(m_pSession, m_hIf, m_pIfBuf, &m_MacAddress, m_Ipv4Address))
1008	/* nothing */;
1009
1010	/* Advance to the next frame. */
1011	INTNETRingSkipFrame(m_pIfBuf, pRingBuf);
1012	}
1013	}
1014
1015	return 0;
1016	}
1017
1018
1019	/**
1020	* Handles a DHCP message.
1021	*
1022	* @returns true if handled, false if not.
1023	* @param uMsgType The message type.
1024	* @param pDhcpMsg The DHCP message.
1025	* @param cb The size of the DHCP message.
1026	*/
1027	bool VBoxNetDhcp::handleDhcpMsg(uint8_t uMsgType, PCRTNETBOOTP pDhcpMsg, size_t cb)
1028	{
1029	if (pDhcpMsg->bp_op == RTNETBOOTP_OP_REQUEST)
1030	{
1031	switch (uMsgType)
1032	{
1033	case RTNET_DHCP_MT_DISCOVER:
1034	return handleDhcpReqDiscover(pDhcpMsg, cb);
1035
1036	case RTNET_DHCP_MT_REQUEST:
1037	return handleDhcpReqRequest(pDhcpMsg, cb);
1038
1039	case RTNET_DHCP_MT_DECLINE:
1040	return handleDhcpReqDecline(pDhcpMsg, cb);
1041
1042	case RTNET_DHCP_MT_RELEASE:
1043	return handleDhcpReqRelease(pDhcpMsg, cb);
1044
1045	case RTNET_DHCP_MT_INFORM:
1046	debugPrint(0, true, "Should we handle this?");
1047	break;
1048
1049	default:
1050	debugPrint(0, true, "Unexpected.");
1051	break;
1052	}
1053	}
1054	return false;
1055	}
1056
1057
1058	/**
1059	* The client is requesting an offer.
1060	*
1061	* @returns true.
1062	*
1063	* @param pDhcpMsg The message.
1064	* @param cb The message size.
1065	*/
1066	bool VBoxNetDhcp::handleDhcpReqDiscover(PCRTNETBOOTP pDhcpMsg, size_t cb)
1067	{
1068	/*
1069	* The newLease() method contains logic for finding current leases
1070	* and reusing them in case the client is forgetful.
1071	*/
1072	VBoxNetDhcpLease *pLease = newLease(pDhcpMsg, cb);
1073	if (!pLease)
1074	return false;
1075	debugPrint(1, true, "Offering %d.%d.%d.%d to %.6Rhxs xid=%#x",
1076	pLease->m_IPv4Address.au8[0],
1077	pLease->m_IPv4Address.au8[1],
1078	pLease->m_IPv4Address.au8[2],
1079	pLease->m_IPv4Address.au8[3],
1080	&pDhcpMsg->bp_chaddr.Mac,
1081	pDhcpMsg->bp_xid);
1082	pLease->offer(pDhcpMsg->bp_xid);
1083
1084	makeDhcpReply(RTNET_DHCP_MT_OFFER, pLease, pDhcpMsg, cb);
1085	return true;
1086	}
1087
1088
1089	/**
1090	* The client is requesting an offer.
1091	*
1092	* @returns true.
1093	*
1094	* @param pDhcpMsg The message.
1095	* @param cb The message size.
1096	*/
1097	bool VBoxNetDhcp::handleDhcpReqRequest(PCRTNETBOOTP pDhcpMsg, size_t cb)
1098	{
1099	/** @todo Probably need to match the server IP here to work correctly with
1100	* other servers. */
1101	/** @todo This code isn't entirely correct and quite a bit of a hack, but it
1102	* will have to do for now as the right thing (tm) is very complex.
1103	* Part of the fun is verifying that the request is something we can
1104	* and should handle. */
1105
1106	/*
1107	* Try find the lease by the requested address + client MAC address.
1108	*/
1109	VBoxNetDhcpLease *pLease = NULL;
1110	RTNETADDRIPV4 IPv4Addr;
1111	bool fReqAddr = findOptionIPv4Addr(RTNET_DHCP_OPT_REQ_ADDR, pDhcpMsg, cb, &IPv4Addr);
1112	if (fReqAddr)
1113	{
1114	fReqAddr = true;
1115	pLease = findLeaseByIpv4AndMacAddresses(IPv4Addr, &pDhcpMsg->bp_chaddr.Mac, true /* fAnyState */);
1116	}
1117
1118	/*
1119	* Try find the lease by the client IP address + client MAC address.
1120	*/
1121	if ( !pLease
1122	&& pDhcpMsg->bp_ciaddr.u)
1123	pLease = findLeaseByIpv4AndMacAddresses(pDhcpMsg->bp_ciaddr, &pDhcpMsg->bp_chaddr.Mac, true /* fAnyState */);
1124
1125	#if 0 /** @todo client id stuff - it doesn't make sense here imho, we need IP + MAC. What would make sense
1126	though is to compare the client id with what we've got in the lease and use it to root out
1127	bad requests. */
1128	/*
1129	* Try find the lease by using the client id.
1130	*/
1131	if (!pLease)
1132	{
1133	size_t cbClientID = 0;
1134	uint8_t const *pbClientID = findOption(RTNET_DHCP_OPT_CLIENT_ID, pDhcpMsg, cb, &cbClientID);
1135	if ( pbClientID
1136	&& cbClientID == sizeof(RTMAC) + 1
1137	&& pbClientID[0] == RTNET_ARP_ETHER
1138	&&
1139	)
1140	{
1141	pLease = findLeaseByIpv4AndMacAddresses(pDhcpMsg->bp_ciaddr, &pDhcpMsg->bp_chaddr.Mac, true /* fAnyState */);
1142	}
1143	}
1144	#endif
1145
1146	/*
1147	* Validate the lease that's requested.
1148	* We've already check the MAC and IP addresses.
1149	*/
1150	bool fAckIt = false;
1151	if (pLease)
1152	{
1153	if (pLease->isBeingOffered())
1154	{
1155	if (pLease->m_xid == pDhcpMsg->bp_xid)
1156	{
1157	fAckIt = true;
1158	debugPrint(2, true, "REQUEST for offered lease.");
1159	pLease->activate();
1160	}
1161	else
1162	debugPrint(2, true, "REQUEST for offered lease, xid mismatch. Expected %#x, got %#x.",
1163	pLease->m_xid, pDhcpMsg->bp_xid);
1164	}
1165	else if (!pLease->isInCurrentConfig())
1166	debugPrint(1, true, "REQUEST for obsolete lease -> NAK");
1167	else if (fReqAddr != (pDhcpMsg->bp_ciaddr.u != 0)) // ???
1168	{
1169	/** @todo this ain't safe. */
1170	debugPrint(1, true, "REQUEST for lease not on offer, assuming renewal. lease_xid=%#x bp_xid=%#x",
1171	pLease->m_xid, pDhcpMsg->bp_xid);
1172	fAckIt = true;
1173	pLease->activate(pDhcpMsg->bp_xid);
1174	}
1175	else
1176	debugPrint(1, true, "REQUEST for lease not on offer, NAK it.");
1177	}
1178
1179	/*
1180	* NAK if if no lease was found.
1181	*/
1182	if (fAckIt)
1183	{
1184	debugPrint(1, false, "ACK'ing DHCP_REQUEST");
1185	makeDhcpReply(RTNET_DHCP_MT_ACK, pLease, pDhcpMsg, cb);
1186	}
1187	else
1188	{
1189	debugPrint(1, false, "NAK'ing DHCP_REQUEST");
1190	makeDhcpReply(RTNET_DHCP_MT_NAC, NULL, pDhcpMsg, cb);
1191	}
1192
1193	return true;
1194	}
1195
1196
1197	/**
1198	* The client is declining an offer we've made.
1199	*
1200	* @returns true.
1201	*
1202	* @param pDhcpMsg The message.
1203	* @param cb The message size.
1204	*/
1205	bool VBoxNetDhcp::handleDhcpReqDecline(PCRTNETBOOTP pDhcpMsg, size_t cb)
1206	{
1207	/** @todo Probably need to match the server IP here to work correctly with
1208	* other servers. */
1209
1210	/*
1211	* The client is supposed to pass us option 50, requested address,
1212	* from the offer. We also match the lease state. Apparently the
1213	* MAC address is not supposed to be checked here.
1214	*/
1215
1216	/** @todo this is not required in the initial implementation, do it later. */
1217	debugPrint(1, true, "DECLINE is not implemented");
1218	return true;
1219	}
1220
1221
1222	/**
1223	* The client is releasing its lease - good boy.
1224	*
1225	* @returns true.
1226	*
1227	* @param pDhcpMsg The message.
1228	* @param cb The message size.
1229	*/
1230	bool VBoxNetDhcp::handleDhcpReqRelease(PCRTNETBOOTP pDhcpMsg, size_t cb)
1231	{
1232	/** @todo Probably need to match the server IP here to work correctly with
1233	* other servers. */
1234
1235	/*
1236	* The client may pass us option 61, client identifier, which we should
1237	* use to find the lease by.
1238	*
1239	* We're matching MAC address and lease state as well.
1240	*/
1241
1242	/*
1243	* If no client identifier or if we couldn't find a lease by using it,
1244	* we will try look it up by the client IP address.
1245	*/
1246
1247
1248	/*
1249	* If found, release it.
1250	*/
1251
1252
1253	/** @todo this is not required in the initial implementation, do it later. */
1254	debugPrint(1, true, "RELEASE is not implemented");
1255	return true;
1256	}
1257
1258
1259	/**
1260	* Helper class for stuffing DHCP options into a reply packet.
1261	*/
1262	class VBoxNetDhcpWriteCursor
1263	{
1264	private:
1265	uint8_t m_pbCur; /< The current cursor position. /
1266	uint8_t m_pbEnd; /< The end the current option space. /
1267	uint8_t m_pfOverload; /< Pointer to the flags of the overload option. /
1268	uint8_t m_fUsed; /*< Overload fields that have been used. /
1269	PRTNETDHCPOPT m_pOpt; /*< The current option. /
1270	PRTNETBOOTP m_pDhcp; /*< The DHCP packet. /
1271	bool m_fOverflowed; /*< Set if we've overflowed, otherwise false. /
1272
1273	public:
1274	/** Instantiate an option cursor for the specified DHCP message. */
1275	VBoxNetDhcpWriteCursor(PRTNETBOOTP pDhcp, size_t cbDhcp) :
1276	m_pbCur(&pDhcp->bp_vend.Dhcp.dhcp_opts[0]),
1277	m_pbEnd((uint8_t *)pDhcp + cbDhcp),
1278	m_pfOverload(NULL),
1279	m_fUsed(0),
1280	m_pOpt(NULL),
1281	m_pDhcp(pDhcp),
1282	m_fOverflowed(false)
1283	{
1284	AssertPtr(pDhcp);
1285	Assert(cbDhcp > RT_UOFFSETOF(RTNETBOOTP, bp_vend.Dhcp.dhcp_opts[10]));
1286	}
1287
1288	/** Destructor. */
1289	~VBoxNetDhcpWriteCursor()
1290	{
1291	m_pbCur = m_pbEnd = m_pfOverload = NULL;
1292	m_pOpt = NULL;
1293	m_pDhcp = NULL;
1294	}
1295
1296	/**
1297	* Try use the bp_file field.
1298	* @returns true if not overloaded, false otherwise.
1299	*/
1300	bool useBpFile(void)
1301	{
1302	if ( m_pfOverload
1303	&& (*m_pfOverload & 1))
1304	return false;
1305	m_fUsed \|= 1 /* bp_file flag*/;
1306	return true;
1307	}
1308
1309
1310	/**
1311	* Try overload more BOOTP fields
1312	*/
1313	bool overloadMore(void)
1314	{
1315	/* switch option area. */
1316	uint8_t *pbNew;
1317	uint8_t *pbNewEnd;
1318	uint8_t fField;
1319	if (!(m_fUsed & 1))
1320	{
1321	fField = 1;
1322	pbNew = &m_pDhcp->bp_file[0];
1323	pbNewEnd = &m_pDhcp->bp_file[sizeof(m_pDhcp->bp_file)];
1324	}
1325	else if (!(m_fUsed & 2))
1326	{
1327	fField = 2;
1328	pbNew = &m_pDhcp->bp_sname[0];
1329	pbNewEnd = &m_pDhcp->bp_sname[sizeof(m_pDhcp->bp_sname)];
1330	}
1331	else
1332	return false;
1333
1334	if (!m_pfOverload)
1335	{
1336	/* Add an overload option. */
1337	*m_pbCur++ = RTNET_DHCP_OPT_OPTION_OVERLOAD;
1338	*m_pbCur++ = fField;
1339	m_pfOverload = m_pbCur;
1340	m_pbCur++ = 1; / bp_file flag */
1341	}
1342	else
1343	*m_pfOverload \|= fField;
1344
1345	/* pad current option field */
1346	while (m_pbCur != m_pbEnd)
1347	m_pbCur++ = RTNET_DHCP_OPT_PAD; /* @todo not sure if this stuff is at all correct... */
1348
1349	/* switch */
1350	m_pbCur = pbNew;
1351	m_pbEnd = pbNewEnd;
1352	return true;
1353	}
1354
1355	/**
1356	* Begin an option.
1357	*
1358	* @returns true on succes, false if we're out of space.
1359	*
1360	* @param uOption The option number.
1361	* @param cb The amount of data.
1362	*/
1363	bool begin(uint8_t uOption, size_t cb)
1364	{
1365	/* Check that the data of the previous option has all been written. */
1366	Assert( !m_pOpt
1367	\|\| (m_pbCur - m_pOpt->dhcp_len == (uint8_t *)(m_pOpt + 1)));
1368	AssertMsg(cb <= 255, ("%#x\n", cb));
1369
1370	/* Check if we need to overload more stuff. */
1371	if ((uintptr_t)(m_pbEnd - m_pbCur) < cb + 2 + (m_pfOverload ? 1 : 3))
1372	{
1373	m_pOpt = NULL;
1374	if (!overloadMore())
1375	{
1376	m_fOverflowed = true;
1377	AssertMsgFailedReturn(("%u %#x\n", uOption, cb), false);
1378	}
1379	if ((uintptr_t)(m_pbEnd - m_pbCur) < cb + 2 + 1)
1380	{
1381	m_fOverflowed = true;
1382	AssertMsgFailedReturn(("%u %#x\n", uOption, cb), false);
1383	}
1384	}
1385
1386	/* Emit the option header. */
1387	m_pOpt = (PRTNETDHCPOPT)m_pbCur;
1388	m_pOpt->dhcp_opt = uOption;
1389	m_pOpt->dhcp_len = cb;
1390	m_pbCur += 2;
1391	return true;
1392	}
1393
1394	/**
1395	* Puts option data.
1396	*
1397	* @param pvData The data.
1398	* @param cb The amount to put.
1399	*/
1400	void put(void const *pvData, size_t cb)
1401	{
1402	Assert(m_pOpt \|\| m_fOverflowed);
1403	if (RT_LIKELY(m_pOpt))
1404	{
1405	Assert((uintptr_t)m_pbCur - (uintptr_t)(m_pOpt + 1) + cb <= (size_t)m_pOpt->dhcp_len);
1406	memcpy(m_pbCur, pvData, cb);
1407	m_pbCur += cb;
1408	}
1409	}
1410
1411	/**
1412	* Puts an IPv4 Address.
1413	*
1414	* @param IPv4Addr The address.
1415	*/
1416	void putIPv4Addr(RTNETADDRIPV4 IPv4Addr)
1417	{
1418	put(&IPv4Addr, 4);
1419	}
1420
1421	/**
1422	* Adds an IPv4 address option.
1423	*
1424	* @returns true/false just like begin().
1425	*
1426	* @param uOption The option number.
1427	* @param IPv4Addr The address.
1428	*/
1429	bool optIPv4Addr(uint8_t uOption, RTNETADDRIPV4 IPv4Addr)
1430	{
1431	if (!begin(uOption, 4))
1432	return false;
1433	putIPv4Addr(IPv4Addr);
1434	return true;
1435	}
1436
1437	/**
1438	* Adds an option taking 1 or more IPv4 address.
1439	*
1440	* If the vector contains no addresses, the option will not be added.
1441	*
1442	* @returns true/false just like begin().
1443	*
1444	* @param uOption The option number.
1445	* @param rIPv4Addrs Reference to the address vector.
1446	*/
1447	bool optIPv4Addrs(uint8_t uOption, std::vector<RTNETADDRIPV4> const &rIPv4Addrs)
1448	{
1449	size_t const c = rIPv4Addrs.size();
1450	if (!c)
1451	return true;
1452
1453	if (!begin(uOption, 4*c))
1454	return false;
1455	for (size_t i = 0; i < c; i++)
1456	putIPv4Addr(rIPv4Addrs[i]);
1457	return true;
1458	}
1459
1460	/**
1461	* Puts an 8-bit integer.
1462	*
1463	* @param u8 The integer.
1464	*/
1465	void putU8(uint8_t u8)
1466	{
1467	put(&u8, 1);
1468	}
1469
1470	/**
1471	* Adds an 8-bit integer option.
1472	*
1473	* @returns true/false just like begin().
1474	*
1475	* @param uOption The option number.
1476	* @param u8 The integer
1477	*/
1478	bool optU8(uint8_t uOption, uint8_t u8)
1479	{
1480	if (!begin(uOption, 1))
1481	return false;
1482	putU8(u8);
1483	return true;
1484	}
1485
1486	/**
1487	* Puts an 32-bit integer (network endian).
1488	*
1489	* @param u32Network The integer.
1490	*/
1491	void putU32(uint32_t u32)
1492	{
1493	put(&u32, 4);
1494	}
1495
1496	/**
1497	* Adds an 32-bit integer (network endian) option.
1498	*
1499	* @returns true/false just like begin().
1500	*
1501	* @param uOption The option number.
1502	* @param u32Network The integer.
1503	*/
1504	bool optU32(uint8_t uOption, uint32_t u32)
1505	{
1506	if (!begin(uOption, 4))
1507	return false;
1508	putU32(u32);
1509	return true;
1510	}
1511
1512	/**
1513	* Puts a std::string.
1514	*
1515	* @param rStr Reference to the string.
1516	*/
1517	void putStr(std::string const &rStr)
1518	{
1519	put(rStr.c_str(), rStr.size());
1520	}
1521
1522	/**
1523	* Adds an std::string option if the string isn't empty.
1524	*
1525	* @returns true/false just like begin().
1526	*
1527	* @param uOption The option number.
1528	* @param rStr Reference to the string.
1529	*/
1530	bool optStr(uint8_t uOption, std::string const &rStr)
1531	{
1532	const size_t cch = rStr.size();
1533	if (!cch)
1534	return true;
1535
1536	if (!begin(uOption, cch))
1537	return false;
1538	put(rStr.c_str(), cch);
1539	return true;
1540	}
1541
1542	/**
1543	* Whether we've overflowed.
1544	*
1545	* @returns true on overflow, false otherwise.
1546	*/
1547	bool hasOverflowed(void) const
1548	{
1549	return m_fOverflowed;
1550	}
1551
1552	/**
1553	* Adds the terminating END option.
1554	*
1555	* The END will always be added as we're reserving room for it, however, we
1556	* might've dropped previous options due to overflows and that is what the
1557	* return status indicates.
1558	*
1559	* @returns true on success, false on a (previous) overflow.
1560	*/
1561	bool optEnd(void)
1562	{
1563	Assert((uintptr_t)(m_pbEnd - m_pbCur) < 4096);
1564	*m_pbCur++ = RTNET_DHCP_OPT_END;
1565	return !hasOverflowed();
1566	}
1567	};
1568
1569
1570	/**
1571	* Constructs and sends a reply to a client.
1572	*
1573	* @returns
1574	* @param uMsgType The DHCP message type.
1575	* @param pLease The lease. This can be NULL for some replies.
1576	* @param pDhcpMsg The client message. We will dig out the MAC address,
1577	* transaction ID, and requested options from this.
1578	* @param cb The size of the client message.
1579	*/
1580	void VBoxNetDhcp::makeDhcpReply(uint8_t uMsgType, VBoxNetDhcpLease *pLease, PCRTNETBOOTP pDhcpMsg, size_t cb)
1581	{
1582	size_t cbReply = RTNET_DHCP_NORMAL_SIZE; /** @todo respect the RTNET_DHCP_OPT_MAX_DHCP_MSG_SIZE option */
1583	PRTNETBOOTP pReply = (PRTNETBOOTP)alloca(cbReply);
1584
1585	/*
1586	* The fixed bits stuff.
1587	*/
1588	pReply->bp_op = RTNETBOOTP_OP_REPLY;
1589	pReply->bp_htype = RTNET_ARP_ETHER;
1590	pReply->bp_hlen = sizeof(RTMAC);
1591	pReply->bp_hops = 0;
1592	pReply->bp_xid = pDhcpMsg->bp_xid;
1593	pReply->bp_secs = 0;
1594	pReply->bp_flags = 0; // (pDhcpMsg->bp_flags & RTNET_DHCP_FLAGS_NO_BROADCAST); ??
1595	pReply->bp_ciaddr.u = 0;
1596	pReply->bp_yiaddr.u = pLease ? pLease->m_IPv4Address.u : 0xffffffff;
1597	pReply->bp_siaddr.u = pLease && pLease->m_pCfg ? pLease->m_pCfg->m_TftpServerAddr.u : 0; /* (next server == TFTP)*/
1598	pReply->bp_giaddr.u = 0;
1599	memset(&pReply->bp_chaddr, '\0', sizeof(pReply->bp_chaddr));
1600	pReply->bp_chaddr.Mac = pDhcpMsg->bp_chaddr.Mac;
1601	memset(&pReply->bp_sname[0], '\0', sizeof(pReply->bp_sname));
1602	memset(&pReply->bp_file[0], '\0', sizeof(pReply->bp_file));
1603	pReply->bp_vend.Dhcp.dhcp_cookie = RT_H2N_U32_C(RTNET_DHCP_COOKIE);
1604	memset(&pReply->bp_vend.Dhcp.dhcp_opts[0], '\0', RTNET_DHCP_OPT_SIZE);
1605
1606	/*
1607	* The options - use a cursor class for dealing with the ugly stuff.
1608	*/
1609	VBoxNetDhcpWriteCursor Cursor(pReply, cbReply);
1610
1611	/* The basics */
1612	Cursor.optU8(RTNET_DHCP_OPT_MSG_TYPE, uMsgType);
1613	Cursor.optIPv4Addr(RTNET_DHCP_OPT_SERVER_ID, m_Ipv4Address);
1614
1615	if (uMsgType != RTNET_DHCP_MT_NAC)
1616	{
1617	AssertReturnVoid(pLease && pLease->m_pCfg);
1618	const VBoxNetDhcpCfg pCfg = pLease->m_pCfg; / no need to retain it. */
1619
1620	/* The IP config. */
1621	Cursor.optU32(RTNET_DHCP_OPT_LEASE_TIME, RT_H2N_U32(pCfg->m_cSecLease));
1622	Cursor.optIPv4Addr(RTNET_DHCP_OPT_SUBNET_MASK, pCfg->m_SubnetMask);
1623	Cursor.optIPv4Addrs(RTNET_DHCP_OPT_ROUTERS, pCfg->m_Routers);
1624	Cursor.optIPv4Addrs(RTNET_DHCP_OPT_ROUTERS, pCfg->m_DNSes);
1625	Cursor.optStr(RTNET_DHCP_OPT_HOST_NAME, pCfg->m_HostName);
1626	Cursor.optStr(RTNET_DHCP_OPT_DOMAIN_NAME, pCfg->m_DomainName);
1627
1628	/* The PXE config. */
1629	if (pCfg->m_BootfileName.size())
1630	{
1631	if (Cursor.useBpFile())
1632	RTStrPrintf((char *)&pReply->bp_file[0], sizeof(pReply->bp_file), "%s", pCfg->m_BootfileName.c_str());
1633	else
1634	Cursor.optStr(RTNET_DHCP_OPT_BOOTFILE_NAME, pCfg->m_BootfileName);
1635	}
1636	}
1637
1638	/* Terminate the options. */
1639	if (!Cursor.optEnd())
1640	debugPrint(0, true, "option overflow\n");
1641
1642	/*
1643	* Send it.
1644	*/
1645	int rc;
1646	#if 0
1647	if (!(pDhcpMsg->bp_flags & RTNET_DHCP_FLAGS_NO_BROADCAST)) /** @todo need to see someone set this flag to check that it's correct. */
1648	{
1649	RTNETADDRIPV4 IPv4AddrBrdCast;
1650	IPv4AddrBrdCast.u = UINT32_C(0xffffffff); /* broadcast IP */
1651	rc = VBoxNetUDPUnicast(m_pSession, m_hIf, m_pIfBuf,
1652	m_Ipv4Address, &m_MacAddress, RTNETIPV4_PORT_BOOTPS, /* sender */
1653	IPv4AddrBrdCast, &pDhcpMsg->bp_chaddr.Mac, RTNETIPV4_PORT_BOOTPC, /* receiver */
1654	pReply, cbReply);
1655	}
1656	else
1657	#endif
1658	rc = VBoxNetUDPBroadcast(m_pSession, m_hIf, m_pIfBuf,
1659	m_Ipv4Address, &m_MacAddress, RTNETIPV4_PORT_BOOTPS, /* sender */
1660	RTNETIPV4_PORT_BOOTPC, /* receiver port */
1661	pReply, cbReply);
1662	if (RT_FAILURE(rc))
1663	debugPrint(0, true, "error %Rrc when sending the reply", rc);
1664	}
1665
1666
1667	/**
1668	* Look up a lease by MAC address.
1669	*
1670	* @returns Pointer to the lease if found, NULL if not found.
1671	* @param pMacAddress The mac address.
1672	* @param fAnyState Any state.
1673	*/
1674	VBoxNetDhcpLease *VBoxNetDhcp::findLeaseByMacAddress(PCRTMAC pMacAddress, bool fAnyState)
1675	{
1676	size_t iLease = m_Leases.size();
1677	while (iLease-- > 0)
1678	{
1679	VBoxNetDhcpLease *pLease = &m_Leases[iLease];
1680	if ( pLease
1681	&& pLease->m_MacAddress.au16[0] == pMacAddress->au16[0]
1682	&& pLease->m_MacAddress.au16[1] == pMacAddress->au16[1]
1683	&& pLease->m_MacAddress.au16[2] == pMacAddress->au16[2]
1684	&& ( fAnyState
1685	\|\| (pLease->m_enmState != VBoxNetDhcpLease::kState_Free)) )
1686	return pLease;
1687	}
1688
1689	return NULL;
1690	}
1691
1692
1693	/**
1694	* Look up a lease by IPv4 and MAC addresses.
1695	*
1696	* @returns Pointer to the lease if found, NULL if not found.
1697	* @param IPv4Addr The IPv4 address.
1698	* @param pMacAddress The mac address.
1699	* @param fAnyState Any state.
1700	*/
1701	VBoxNetDhcpLease *VBoxNetDhcp::findLeaseByIpv4AndMacAddresses(RTNETADDRIPV4 IPv4Addr, PCRTMAC pMacAddress, bool fAnyState)
1702	{
1703	size_t iLease = m_Leases.size();
1704	while (iLease-- > 0)
1705	{
1706	VBoxNetDhcpLease *pLease = &m_Leases[iLease];
1707	if ( pLease
1708	&& pLease->m_IPv4Address.u == IPv4Addr.u
1709	&& pLease->m_MacAddress.au16[0] == pMacAddress->au16[0]
1710	&& pLease->m_MacAddress.au16[1] == pMacAddress->au16[1]
1711	&& pLease->m_MacAddress.au16[2] == pMacAddress->au16[2]
1712	&& ( fAnyState
1713	\|\| (pLease->m_enmState != VBoxNetDhcpLease::kState_Free)) )
1714	return pLease;
1715	}
1716
1717	return NULL;
1718	}
1719
1720
1721	/**
1722	* Creates a new lease for the client specified in the DHCP message.
1723	*
1724	* The caller has already made sure it doesn't already have a lease.
1725	*
1726	* @returns Pointer to the lease if found, NULL+log if not found.
1727	* @param IPv4Addr The IPv4 address.
1728	* @param pMacAddress The MAC address.
1729	*/
1730	VBoxNetDhcpLease *VBoxNetDhcp::newLease(PCRTNETBOOTP pDhcpMsg, size_t cb)
1731	{
1732	RTMAC const MacAddr = pDhcpMsg->bp_chaddr.Mac;
1733	RTTIMESPEC Now;
1734	RTTimeNow(&Now);
1735
1736	/*
1737	* Search the possible leases.
1738	*
1739	* We'll try do all the searches in one pass, that is to say, perfect
1740	* match, old lease, and next free/expired lease.
1741	*/
1742	VBoxNetDhcpLease *pBest = NULL;
1743	VBoxNetDhcpLease *pOld = NULL;
1744	VBoxNetDhcpLease *pFree = NULL;
1745
1746	size_t cLeases = m_Leases.size();
1747	for (size_t i = 0; i < cLeases; i++)
1748	{
1749	VBoxNetDhcpLease *pCur = &m_Leases[i];
1750
1751	/* Skip it if no configuration, that means its not in the current config. */
1752	if (!pCur->m_pCfg)
1753	continue;
1754
1755	/* best */
1756	if ( pCur->isOneSpecificClient()
1757	&& pCur->m_pCfg->matchesMacAddress(&MacAddr))
1758	{
1759	if ( !pBest
1760	\|\| pBest->m_pCfg->m_MacAddresses.size() < pCur->m_pCfg->m_MacAddresses.size())
1761	pBest = pCur;
1762	}
1763
1764	/* old lease */
1765	if ( pCur->m_MacAddress.au16[0] == MacAddr.au16[0]
1766	&& pCur->m_MacAddress.au16[1] == MacAddr.au16[1]
1767	&& pCur->m_MacAddress.au16[2] == MacAddr.au16[2])
1768	{
1769	if ( !pOld
1770	\|\| RTTimeSpecGetSeconds(&pCur->m_ExpireTime) > RTTimeSpecGetSeconds(&pFree->m_ExpireTime))
1771	pOld = pCur;
1772	}
1773
1774	/* expired lease */
1775	if (!pCur->isInUse(&Now))
1776	{
1777	if ( !pFree
1778	\|\| RTTimeSpecGetSeconds(&pCur->m_ExpireTime) < RTTimeSpecGetSeconds(&pFree->m_ExpireTime))
1779	pFree = pCur;
1780	}
1781	}
1782
1783	VBoxNetDhcpLease *pNew = pBest;
1784	if (!pNew)
1785	pNew = pOld;
1786	if (!pNew)
1787	pNew = pFree;
1788	if (!pNew)
1789	{
1790	debugPrint(0, true, "No more leases.");
1791	return NULL;
1792	}
1793
1794	/*
1795	* Init the lease.
1796	*/
1797	pNew->m_MacAddress = MacAddr;
1798	pNew->m_xid = pDhcpMsg->bp_xid;
1799	/** @todo extract the client id. */
1800
1801	return pNew;
1802	}
1803
1804
1805	/**
1806	* Finds an option.
1807	*
1808	* @returns On success, a pointer to the first byte in the option data (no none
1809	* then it'll be the byte following the 0 size field) and *pcbOpt set
1810	* to the option length.
1811	* On failure, NULL is returned and *pcbOpt unchanged.
1812	*
1813	* @param uOption The option to search for.
1814	* @param pDhcpMsg The DHCP message.
1815	* @param cb The size of the message.
1816	* @param pcbOpt Where to store the option size size. Optional. Note
1817	* that this is adjusted if the option length is larger
1818	* than the message buffer.
1819	*/
1820	/* static / const uint8_t
1821	VBoxNetDhcp::findOption(uint8_t uOption, PCRTNETBOOTP pDhcpMsg, size_t cb, size_t *pcbOpt)
1822	{
1823	Assert(uOption != RTNET_DHCP_OPT_PAD);
1824
1825	/*
1826	* Validate the DHCP bits and figure the max size of the options in the vendor field.
1827	*/
1828	if (cb <= RT_UOFFSETOF(RTNETBOOTP, bp_vend.Dhcp.dhcp_opts))
1829	return NULL;
1830	if (pDhcpMsg->bp_vend.Dhcp.dhcp_cookie != RT_H2N_U32_C(RTNET_DHCP_COOKIE))
1831	return NULL;
1832	size_t cbLeft = cb - RT_UOFFSETOF(RTNETBOOTP, bp_vend.Dhcp.dhcp_opts);
1833	if (cbLeft > RTNET_DHCP_OPT_SIZE)
1834	cbLeft = RTNET_DHCP_OPT_SIZE;
1835
1836	/*
1837	* Search the vendor field.
1838	*/
1839	bool fExtended = false;
1840	uint8_t const *pb = &pDhcpMsg->bp_vend.Dhcp.dhcp_opts[0];
1841	while (pb && cbLeft > 0)
1842	{
1843	uint8_t uCur = *pb;
1844	if (uCur == RTNET_DHCP_OPT_PAD)
1845	{
1846	cbLeft--;
1847	pb++;
1848	}
1849	else if (cbLeft <= 1)
1850	break;
1851	else
1852	{
1853	size_t cbCur = pb[1];
1854	if (cbCur > cbLeft - 2)
1855	cbCur = cbLeft - 2;
1856	if (uCur == uOption)
1857	{
1858	if (pcbOpt)
1859	*pcbOpt = cbCur;
1860	return pb+2;
1861	}
1862	pb += cbCur + 2;
1863	cbLeft -= cbCur - 2;
1864	}
1865	}
1866
1867	/** @todo search extended dhcp option field(s) when present */
1868
1869	return NULL;
1870	}
1871
1872
1873	/**
1874	* Locates an option with an IPv4 address in the DHCP message.
1875	*
1876	* @returns true and *pIpv4Addr if found, false if not.
1877	*
1878	* @param uOption The option to find.
1879	* @param pDhcpMsg The DHCP message.
1880	* @param cb The size of the message.
1881	* @param pIPv4Addr Where to put the address.
1882	*/
1883	/* static */ bool
1884	VBoxNetDhcp::findOptionIPv4Addr(uint8_t uOption, PCRTNETBOOTP pDhcpMsg, size_t cb, PRTNETADDRIPV4 pIPv4Addr)
1885	{
1886	size_t cbOpt;
1887	uint8_t const *pbOpt = findOption(uOption, pDhcpMsg, cb, &cbOpt);
1888	if (pbOpt)
1889	{
1890	if (cbOpt >= sizeof(RTNETADDRIPV4))
1891	{
1892	pIPv4Addr = (PCRTNETADDRIPV4)pbOpt;
1893	return true;
1894	}
1895	}
1896	return false;
1897	}
1898
1899
1900	/**
1901	* Print debug message depending on the m_cVerbosity level.
1902	*
1903	* @param iMinLevel The minimum m_cVerbosity level for this message.
1904	* @param fMsg Whether to dump parts for the current DHCP message.
1905	* @param pszFmt The message format string.
1906	* @param ... Optional arguments.
1907	*/
1908	inline void VBoxNetDhcp::debugPrint(int32_t iMinLevel, bool fMsg, const char *pszFmt, ...) const
1909	{
1910	if (iMinLevel <= m_cVerbosity)
1911	{
1912	va_list va;
1913	va_start(va, pszFmt);
1914	debugPrintV(iMinLevel, fMsg, pszFmt, va);
1915	va_end(va);
1916	}
1917	}
1918
1919
1920	/**
1921	* Print debug message depending on the m_cVerbosity level.
1922	*
1923	* @param iMinLevel The minimum m_cVerbosity level for this message.
1924	* @param fMsg Whether to dump parts for the current DHCP message.
1925	* @param pszFmt The message format string.
1926	* @param va Optional arguments.
1927	*/
1928	void VBoxNetDhcp::debugPrintV(int iMinLevel, bool fMsg, const char *pszFmt, va_list va) const
1929	{
1930	if (iMinLevel <= m_cVerbosity)
1931	{
1932	va_list vaCopy; /* This dude is very special, thus the copy. */
1933	va_copy(vaCopy, va);
1934	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: %s: %N\n", iMinLevel >= 2 ? "debug" : "info", pszFmt, &vaCopy);
1935	va_end(vaCopy);
1936
1937	if ( fMsg
1938	&& m_cVerbosity >= 2
1939	&& m_pCurMsg)
1940	{
1941	const char *pszMsg = m_uCurMsgType != UINT8_MAX ? debugDhcpName(m_uCurMsgType) : "";
1942	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",
1943	pszMsg,
1944	&m_pCurMsg->bp_chaddr,
1945	m_pCurMsg->bp_ciaddr.au8[0], m_pCurMsg->bp_ciaddr.au8[1], m_pCurMsg->bp_ciaddr.au8[2], m_pCurMsg->bp_ciaddr.au8[3],
1946	m_pCurMsg->bp_yiaddr.au8[0], m_pCurMsg->bp_yiaddr.au8[1], m_pCurMsg->bp_yiaddr.au8[2], m_pCurMsg->bp_yiaddr.au8[3],
1947	m_pCurMsg->bp_siaddr.au8[0], m_pCurMsg->bp_siaddr.au8[1], m_pCurMsg->bp_siaddr.au8[2], m_pCurMsg->bp_siaddr.au8[3],
1948	m_pCurMsg->bp_xid);
1949	}
1950	}
1951	}
1952
1953
1954	/**
1955	* Gets the name of given DHCP message type.
1956	*
1957	* @returns Readonly name.
1958	* @param uMsgType The message number.
1959	*/
1960	/* static / const char VBoxNetDhcp::debugDhcpName(uint8_t uMsgType)
1961	{
1962	switch (uMsgType)
1963	{
1964	case 0: return "MT_00";
1965	case RTNET_DHCP_MT_DISCOVER: return "DISCOVER";
1966	case RTNET_DHCP_MT_OFFER: return "OFFER";
1967	case RTNET_DHCP_MT_REQUEST: return "REQUEST";
1968	case RTNET_DHCP_MT_DECLINE: return "DECLINE";
1969	case RTNET_DHCP_MT_ACK: return "ACK";
1970	case RTNET_DHCP_MT_NAC: return "NAC";
1971	case RTNET_DHCP_MT_RELEASE: return "RELEASE";
1972	case RTNET_DHCP_MT_INFORM: return "INFORM";
1973	case 9: return "MT_09";
1974	case 10: return "MT_0a";
1975	case 11: return "MT_0b";
1976	case 12: return "MT_0c";
1977	case 13: return "MT_0d";
1978	case 14: return "MT_0e";
1979	case 15: return "MT_0f";
1980	case 16: return "MT_10";
1981	case 17: return "MT_11";
1982	case 18: return "MT_12";
1983	case 19: return "MT_13";
1984	case UINT8_MAX: return "MT_ff";
1985	default: return "UNKNOWN";
1986	}
1987	}
1988
1989
1990
1991	/**
1992	* Entry point.
1993	*/
1994	extern "C" DECLEXPORT(int) TrustedMain(int argc, char argv, char envp)
1995	{
1996	/*
1997	* Instantiate the DHCP server and hand it the options.
1998	*/
1999	VBoxNetDhcp *pDhcp = new VBoxNetDhcp();
2000	if (!pDhcp)
2001	{
2002	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: new VBoxNetDhcp failed!\n");
2003	return 1;
2004	}
2005	int rc = pDhcp->parseArgs(argc - 1, argv + 1);
2006	if (rc)
2007	return rc;
2008
2009	/*
2010	* Try connect the server to the network.
2011	*/
2012	rc = pDhcp->tryGoOnline();
2013	if (rc)
2014	{
2015	delete pDhcp;
2016	return rc;
2017	}
2018
2019	/*
2020	* Process requests.
2021	*/
2022	g_pDhcp = pDhcp;
2023	rc = pDhcp->run();
2024	g_pDhcp = NULL;
2025	delete pDhcp;
2026
2027	return rc;
2028	}
2029
2030
2031
2032	#ifndef VBOX_WITH_HARDENING
2033
2034	int main(int argc, char argv, char envp)
2035	{
2036	int rc = RTR3InitAndSUPLib();
2037	if (RT_FAILURE(rc))
2038	{
2039	RTStrmPrintf(g_pStdErr, "VBoxNetDHCP: RTR3InitAndSupLib failed, rc=%Rrc\n", rc);
2040	return 1;
2041	}
2042
2043	return TrustedMain(argc, argv, envp);
2044	}
2045
2046	#endif /* !VBOX_WITH_HARDENING */
2047

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source: vbox/trunk/src/VBox/NetworkServices/DHCP/VBoxNetDHCP.cpp@ 17883

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