Config.cpp@ 78333

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1	/* $Id: Config.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
2	/** @file
3	* DHCP server - server configuration
4	*/
5
6	/*
7	* Copyright (C) 2017-2019 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	#include "Config.h"
19
20	#include <iprt/types.h>
21	#include <iprt/net.h> /* NB: must come before getopt.h */
22	#include <iprt/getopt.h>
23	#include <iprt/path.h>
24	#include <iprt/message.h>
25	#include <iprt/string.h>
26	#include <iprt/uuid.h>
27
28	#include <VBox/com/com.h>
29
30	#include <iostream>
31
32	class ConfigFileError
33	: public RTCError
34	{
35	public:
36	ConfigFileError(const char *pszMessage)
37	: RTCError(pszMessage) {}
38
39	ConfigFileError(const RTCString &a_rstrMessage)
40	: RTCError(a_rstrMessage) {}
41	};
42
43
44	Config::Config()
45	: m_strHome(),
46	m_strNetwork(),
47	m_strBaseName(),
48	m_strTrunk(),
49	m_enmTrunkType(kIntNetTrunkType_Invalid),
50	m_MacAddress(),
51	m_IPv4Address(),
52	m_IPv4Netmask(),
53	m_IPv4PoolFirst(),
54	m_IPv4PoolLast(),
55	m_GlobalOptions(),
56	m_VMMap()
57	{
58	return;
59	}
60
61
62	int Config::init()
63	{
64	int rc;
65
66	rc = homeInit();
67	if (RT_FAILURE(rc))
68	return rc;
69
70	return VINF_SUCCESS;
71	}
72
73
74	int Config::homeInit()
75	{
76	int rc;
77
78	/* pathname of ~/.VirtualBox or equivalent */
79	char szHome[RTPATH_MAX];
80	rc = com::GetVBoxUserHomeDirectory(szHome, sizeof(szHome), false);
81	if (RT_FAILURE(rc))
82	{
83	LogDHCP(("unable to find VirtualBox home directory: %Rrs", rc));
84	return rc;
85	}
86
87	m_strHome.assign(szHome);
88	return VINF_SUCCESS;
89	}
90
91
92	void Config::setNetwork(const std::string &aStrNetwork)
93	{
94	AssertReturnVoid(m_strNetwork.empty());
95
96	m_strNetwork = aStrNetwork;
97	sanitizeBaseName();
98	}
99
100
101	/*
102	* Requires network name to be known as the log file name depends on
103	* it. Alternatively, consider passing the log file name via the
104	* command line?
105	*/
106	int Config::logInit()
107	{
108	int rc;
109	size_t cch;
110
111	if (m_strHome.empty() \|\| m_strBaseName.empty())
112	return VERR_GENERAL_FAILURE;
113
114	/* default log file name */
115	char szLogFile[RTPATH_MAX];
116	cch = RTStrPrintf(szLogFile, sizeof(szLogFile),
117	"%s%c%s-Dhcpd.log",
118	m_strHome.c_str(), RTPATH_DELIMITER, m_strBaseName.c_str());
119	if (cch >= sizeof(szLogFile))
120	return VERR_BUFFER_OVERFLOW;
121
122
123	/* get a writable copy of the base name */
124	char szBaseName[RTPATH_MAX];
125	rc = RTStrCopy(szBaseName, sizeof(szBaseName), m_strBaseName.c_str());
126	if (RT_FAILURE(rc))
127	return rc;
128
129	/* sanitize base name some more to be usable in an environment variable name */
130	for (char p = szBaseName; p != '\0'; ++p)
131	{
132	if ( *p != '_'
133	&& (p < '0' \|\| '9' < p)
134	&& (p < 'a' \|\| 'z' < p)
135	&& (p < 'A' \|\| 'Z' < p))
136	{
137	*p = '_';
138	}
139	}
140
141
142	/* name of the environment variable to control logging */
143	char szEnvVarBase[128];
144	cch = RTStrPrintf(szEnvVarBase, sizeof(szEnvVarBase),
145	"VBOXDHCP_%s_RELEASE_LOG", szBaseName);
146	if (cch >= sizeof(szEnvVarBase))
147	return VERR_BUFFER_OVERFLOW;
148
149
150	rc = com::VBoxLogRelCreate("DHCP Server",
151	szLogFile,
152	RTLOGFLAGS_PREFIX_TIME_PROG,
153	"all all.restrict -default.restrict",
154	szEnvVarBase,
155	RTLOGDEST_FILE
156	#ifdef DEBUG
157	\| RTLOGDEST_STDERR
158	#endif
159	,
160	32768 /* cMaxEntriesPerGroup */,
161	0 /* cHistory */,
162	0 /* uHistoryFileTime */,
163	0 /* uHistoryFileSize */,
164	NULL /* pErrInfo */);
165
166	return rc;
167	}
168
169
170	int Config::complete()
171	{
172	int rc;
173
174	if (m_strNetwork.empty())
175	{
176	LogDHCP(("network name is not specified\n"));
177	return false;
178	}
179
180	logInit();
181
182	bool fMACGenerated = false;
183	if ( m_MacAddress.au16[0] == 0
184	&& m_MacAddress.au16[1] == 0
185	&& m_MacAddress.au16[2] == 0)
186	{
187	RTUUID Uuid;
188	RTUuidCreate(&Uuid);
189
190	m_MacAddress.au8[0] = 0x08;
191	m_MacAddress.au8[1] = 0x00;
192	m_MacAddress.au8[2] = 0x27;
193	m_MacAddress.au8[3] = Uuid.Gen.au8Node[3];
194	m_MacAddress.au8[4] = Uuid.Gen.au8Node[4];
195	m_MacAddress.au8[5] = Uuid.Gen.au8Node[5];
196
197	LogDHCP(("MAC address is not specified: will use generated MAC %RTmac\n", &m_MacAddress));
198	fMACGenerated = true;
199	}
200
201	/* unicast MAC address */
202	if (m_MacAddress.au8[0] & 0x01)
203	{
204	LogDHCP(("MAC address is not unicast: %RTmac\n", &m_MacAddress));
205	return VERR_GENERAL_FAILURE;
206	}
207
208	/* unicast IP address */
209	if ((m_IPv4Address.au8[0] & 0xe0) == 0xe0)
210	{
211	LogDHCP(("IP address is not unicast: %RTnaipv4\n", m_IPv4Address.u));
212	return VERR_GENERAL_FAILURE;
213	}
214
215	/* valid netmask */
216	int iPrefixLengh;
217	rc = RTNetMaskToPrefixIPv4(&m_IPv4Netmask, &iPrefixLengh);
218	if (RT_FAILURE(rc) \|\| iPrefixLengh == 0)
219	{
220	LogDHCP(("IP mask is not valid: %RTnaipv4\n", m_IPv4Netmask.u));
221	return VERR_GENERAL_FAILURE;
222	}
223
224	/* first IP is from the same network */
225	if ((m_IPv4PoolFirst.u & m_IPv4Netmask.u) != (m_IPv4Address.u & m_IPv4Netmask.u))
226	{
227	LogDHCP(("first pool address is outside the network %RTnaipv4/%d: %RTnaipv4\n",
228	(m_IPv4Address.u & m_IPv4Netmask.u), iPrefixLengh,
229	m_IPv4PoolFirst.u));
230	return VERR_GENERAL_FAILURE;
231	}
232
233	/* last IP is from the same network */
234	if ((m_IPv4PoolLast.u & m_IPv4Netmask.u) != (m_IPv4Address.u & m_IPv4Netmask.u))
235	{
236	LogDHCP(("last pool address is outside the network %RTnaipv4/%d: %RTnaipv4\n",
237	(m_IPv4Address.u & m_IPv4Netmask.u), iPrefixLengh,
238	m_IPv4PoolLast.u));
239	return VERR_GENERAL_FAILURE;
240	}
241
242	/* the pool is valid */
243	if (RT_N2H_U32(m_IPv4PoolLast.u) < RT_N2H_U32(m_IPv4PoolFirst.u))
244	{
245	LogDHCP(("pool range is invalid: %RTnaipv4 - %RTnaipv4\n",
246	m_IPv4PoolFirst.u, m_IPv4PoolLast.u));
247	return VERR_GENERAL_FAILURE;
248	}
249
250	/* our own address is not inside the pool */
251	if ( RT_N2H_U32(m_IPv4PoolFirst.u) <= RT_N2H_U32(m_IPv4Address.u)
252	&& RT_N2H_U32(m_IPv4Address.u) <= RT_N2H_U32(m_IPv4PoolLast.u))
253	{
254	LogDHCP(("server address inside the pool range %RTnaipv4 - %RTnaipv4: %RTnaipv4\n",
255	m_IPv4PoolFirst.u, m_IPv4PoolLast.u, m_IPv4Address.u));
256	return VERR_GENERAL_FAILURE;
257	}
258
259	if (!fMACGenerated)
260	LogDHCP(("MAC address %RTmac\n", &m_MacAddress));
261	LogDHCP(("IP address %RTnaipv4/%d\n", m_IPv4Address.u, iPrefixLengh));
262	LogDHCP(("address pool %RTnaipv4 - %RTnaipv4\n", m_IPv4PoolFirst.u, m_IPv4PoolLast.u));
263
264	return VINF_SUCCESS;
265	}
266
267
268	Config *Config::hardcoded()
269	{
270	int rc;
271
272	std::unique_ptr<Config> config(new Config());
273	rc = config->init();
274	if (RT_FAILURE(rc))
275	return NULL;
276
277	config->setNetwork("HostInterfaceNetworking-vboxnet0");
278	config->m_strTrunk.assign("vboxnet0");
279	config->m_enmTrunkType = kIntNetTrunkType_NetFlt;
280
281	config->m_MacAddress.au8[0] = 0x08;
282	config->m_MacAddress.au8[1] = 0x00;
283	config->m_MacAddress.au8[2] = 0x27;
284	config->m_MacAddress.au8[3] = 0xa9;
285	config->m_MacAddress.au8[4] = 0xcf;
286	config->m_MacAddress.au8[5] = 0xef;
287
288
289	config->m_IPv4Address.u = RT_H2N_U32_C(0xc0a838fe); /* 192.168.56.254 */
290	config->m_IPv4Netmask.u = RT_H2N_U32_C(0xffffff00); /* 255.255.255.0 */
291
292	/* flip to test naks */
293	#if 1
294	config->m_IPv4PoolFirst.u = RT_H2N_U32_C(0xc0a8385a); /* 192.168.56.90 */
295	config->m_IPv4PoolLast.u = RT_H2N_U32_C(0xc0a83863); /* 192.168.56.99 */
296	#else
297	config->m_IPv4PoolFirst.u = RT_H2N_U32_C(0xc0a838c9); /* 192.168.56.201 */
298	config->m_IPv4PoolLast.u = RT_H2N_U32_C(0xc0a838dc); /* 192.168.56.220 */
299	#endif
300
301	rc = config->complete();
302	AssertRCReturn(rc, NULL);
303
304	return config.release();
305	}
306
307
308	/* compatibility with old VBoxNetDHCP */
309	static const RTGETOPTDEF g_aCompatOptions[] =
310	{
311	{ "--ip-address", 'i', RTGETOPT_REQ_IPV4ADDR },
312	{ "--lower-ip", 'l', RTGETOPT_REQ_IPV4ADDR },
313	{ "--mac-address", 'a', RTGETOPT_REQ_MACADDR },
314	{ "--need-main", 'M', RTGETOPT_REQ_BOOL },
315	{ "--netmask", 'm', RTGETOPT_REQ_IPV4ADDR },
316	{ "--network", 'n', RTGETOPT_REQ_STRING },
317	{ "--trunk-name", 't', RTGETOPT_REQ_STRING },
318	{ "--trunk-type", 'T', RTGETOPT_REQ_STRING },
319	{ "--upper-ip", 'u', RTGETOPT_REQ_IPV4ADDR },
320	};
321
322
323	Config Config::compat(int argc, char *argv)
324	{
325	RTGETOPTSTATE State;
326	int rc;
327
328	rc = RTGetOptInit(&State, argc, argv,
329	g_aCompatOptions, RT_ELEMENTS(g_aCompatOptions), 1,
330	RTGETOPTINIT_FLAGS_NO_STD_OPTS);
331	AssertRCReturn(rc, NULL);
332
333	std::unique_ptr<Config> config(new Config());
334	rc = config->init();
335	if (RT_FAILURE(rc))
336	return NULL;
337
338	for (;;)
339	{
340	RTGETOPTUNION Val;
341
342	rc = RTGetOpt(&State, &Val);
343	if (rc == 0) /* done */
344	break;
345
346	switch (rc)
347	{
348	case 'a': /* --mac-address */
349	if ( config->m_MacAddress.au16[0] != 0
350	\|\| config->m_MacAddress.au16[1] != 0
351	\|\| config->m_MacAddress.au16[2] != 0)
352	{
353	RTMsgError("Duplicate --mac-address option");
354	return NULL;
355	}
356	config->m_MacAddress = Val.MacAddr;
357	break;
358
359	case 'i': /* --ip-address */
360	if (config->m_IPv4Address.u != 0)
361	{
362	RTMsgError("Duplicate --ip-address option");
363	return NULL;
364	}
365	config->m_IPv4Address = Val.IPv4Addr;
366	break;
367
368	case 'l': /* --lower-ip */
369	if (config->m_IPv4PoolFirst.u != 0)
370	{
371	RTMsgError("Duplicate --lower-ip option");
372	return NULL;
373	}
374	config->m_IPv4PoolFirst = Val.IPv4Addr;
375	break;
376
377	case 'M': /* --need-main */
378	/* for backward compatibility, ignored */
379	break;
380
381	case 'm': /* --netmask */
382	if (config->m_IPv4Netmask.u != 0)
383	{
384	RTMsgError("Duplicate --netmask option");
385	return NULL;
386	}
387	config->m_IPv4Netmask = Val.IPv4Addr;
388	break;
389
390	case 'n': /* --network */
391	if (!config->m_strNetwork.empty())
392	{
393	RTMsgError("Duplicate --network option");
394	return NULL;
395	}
396	config->setNetwork(Val.psz);
397	break;
398
399	case 't': /* --trunk-name */
400	if (!config->m_strTrunk.empty())
401	{
402	RTMsgError("Duplicate --trunk-name option");
403	return NULL;
404	}
405	config->m_strTrunk.assign(Val.psz);
406	break;
407
408	case 'T': /* --trunk-type */
409	if (config->m_enmTrunkType != kIntNetTrunkType_Invalid)
410	{
411	RTMsgError("Duplicate --trunk-type option");
412	return NULL;
413	}
414	else if (strcmp(Val.psz, "none") == 0)
415	config->m_enmTrunkType = kIntNetTrunkType_None;
416	else if (strcmp(Val.psz, "whatever") == 0)
417	config->m_enmTrunkType = kIntNetTrunkType_WhateverNone;
418	else if (strcmp(Val.psz, "netflt") == 0)
419	config->m_enmTrunkType = kIntNetTrunkType_NetFlt;
420	else if (strcmp(Val.psz, "netadp") == 0)
421	config->m_enmTrunkType = kIntNetTrunkType_NetAdp;
422	else
423	{
424	RTMsgError("Unknown trunk type '%s'", Val.psz);
425	return NULL;
426	}
427	break;
428
429	case 'u': /* --upper-ip */
430	if (config->m_IPv4PoolLast.u != 0)
431	{
432	RTMsgError("Duplicate --upper-ip option");
433	return NULL;
434	}
435	config->m_IPv4PoolLast = Val.IPv4Addr;
436	break;
437
438	case VINF_GETOPT_NOT_OPTION:
439	RTMsgError("%s: Unexpected command line argument", Val.psz);
440	return NULL;
441
442	default:
443	RTGetOptPrintError(rc, &Val);
444	return NULL;
445	}
446	}
447
448	rc = config->complete();
449	if (RT_FAILURE(rc))
450	return NULL;
451
452	return config.release();
453	}
454
455
456	#define DHCPD_GETOPT_COMMENT 256 /* No short option for --comment */
457	static const RTGETOPTDEF g_aOptions[] =
458	{
459	{ "--config", 'c', RTGETOPT_REQ_STRING },
460	{ "--comment", DHCPD_GETOPT_COMMENT, RTGETOPT_REQ_STRING }
461	};
462
463
464	Config Config::create(int argc, char *argv)
465	{
466	RTGETOPTSTATE State;
467	int rc;
468
469	rc = RTGetOptInit(&State, argc, argv,
470	g_aOptions, RT_ELEMENTS(g_aOptions), 1,
471	RTGETOPTINIT_FLAGS_NO_STD_OPTS);
472	AssertRCReturn(rc, NULL);
473
474	std::unique_ptr<Config> config;
475	for (;;)
476	{
477	RTGETOPTUNION Val;
478
479	rc = RTGetOpt(&State, &Val);
480	if (rc == 0) /* done */
481	break;
482
483	switch (rc)
484	{
485	case 'c': /* --config */
486	if (config.get() != NULL)
487	{
488	printf("Duplicate option: --config '%s'\n", Val.psz);
489	return NULL;
490	}
491
492	printf("reading config from %s\n", Val.psz);
493	config.reset(Config::read(Val.psz));
494	if (config.get() == NULL)
495	return NULL;
496
497	break;
498
499	case DHCPD_GETOPT_COMMENT: /* --comment */
500	/* The sole purpose of this option is to allow identification of DHCP
501	* server instances in the process list. We ignore the required string
502	* argument of this option.
503	*/
504	continue;
505
506	case VINF_GETOPT_NOT_OPTION:
507	RTMsgError("Unexpected command line argument: '%s'", Val.psz);
508	return NULL;
509
510	default:
511	RTGetOptPrintError(rc, &Val);
512	return NULL;
513	}
514	}
515
516	if (config.get() == NULL)
517	return NULL;
518
519	rc = config->complete();
520	if (RT_FAILURE(rc))
521	return NULL;
522
523	return config.release();
524	}
525
526
527	Config Config::read(const char pszFileName)
528	{
529	int rc;
530
531	if (pszFileName == NULL \|\| pszFileName[0] == '\0')
532	return NULL;
533
534	xml::Document doc;
535	try
536	{
537	xml::XmlFileParser parser;
538	parser.read(pszFileName, doc);
539	}
540	catch (const xml::EIPRTFailure &e)
541	{
542	LogDHCP(("%s\n", e.what()));
543	return NULL;
544	}
545	catch (const RTCError &e)
546	{
547	LogDHCP(("%s\n", e.what()));
548	return NULL;
549	}
550	catch (...)
551	{
552	LogDHCP(("Unknown exception while reading and parsing '%s'\n",
553	pszFileName));
554	return NULL;
555	}
556
557	std::unique_ptr<Config> config(new Config());
558	rc = config->init();
559	if (RT_FAILURE(rc))
560	return NULL;
561
562	try
563	{
564	config->parseConfig(doc.getRootElement());
565	}
566	catch (const RTCError &e)
567	{
568	LogDHCP(("%s\n", e.what()));
569	return NULL;
570	}
571	catch (...)
572	{
573	LogDHCP(("Unexpected exception\n"));
574	return NULL;
575	}
576
577	return config.release();
578	}
579
580
581	void Config::parseConfig(const xml::ElementNode *root)
582	{
583	if (root == NULL)
584	throw ConfigFileError("Empty config file");
585
586	/*
587	* XXX: NAMESPACE API IS COMPLETELY BROKEN, SO IGNORE IT FOR NOW
588	*/
589	if (!root->nameEquals("DHCPServer"))
590	{
591	const char *name = root->getName();
592	throw ConfigFileError(RTCStringFmt("Unexpected root element \"%s\"",
593	name ? name : "(null)"));
594	}
595
596	parseServer(root);
597
598	/** @todo r=bird: Visual C++ 2010 does not grok this use of 'auto'. */
599	// XXX: debug
600	for (optmap_t::const_iterator it = m_GlobalOptions.begin(); it != m_GlobalOptions.end(); ++it) {
601	std::shared_ptr<DhcpOption> opt(it->second);
602
603	octets_t data;
604	opt->encode(data);
605
606	bool space = false;
607	for (octets_t::const_iterator itData = data.begin(); itData != data.end(); ++itData) {
608	uint8_t c = *itData;
609	if (space)
610	std::cout << " ";
611	else
612	space = true;
613	std::cout << (int)c;
614	}
615	std::cout << std::endl;
616	}
617	}
618
619
620	static void getIPv4AddrAttribute(const xml::ElementNode pNode, const char pcszAttrName,
621	RTNETADDRIPV4 *pAddr)
622	{
623	RTCString strAddr;
624	bool fHasAttr = pNode->getAttributeValue(pcszAttrName, &strAddr);
625	if (!fHasAttr)
626	throw ConfigFileError(RTCStringFmt("%s attribute missing",
627	pcszAttrName));
628
629	int rc = RTNetStrToIPv4Addr(strAddr.c_str(), pAddr);
630	if (RT_FAILURE(rc))
631	throw ConfigFileError(RTCStringFmt("%s attribute invalid",
632	pcszAttrName));
633	}
634
635
636	void Config::parseServer(const xml::ElementNode *server)
637	{
638	/*
639	* DHCPServer attributes
640	*/
641	RTCString strNetworkName;
642	bool fHasNetworkName = server->getAttributeValue("networkName", &strNetworkName);
643	if (!fHasNetworkName)
644	throw ConfigFileError("DHCPServer/@networkName missing");
645
646	setNetwork(strNetworkName.c_str());
647
648	RTCString strTrunkType;
649	if (!server->getAttributeValue("trunkType", &strTrunkType))
650	throw ConfigFileError("DHCPServer/@trunkType missing");
651	if (strTrunkType == "none")
652	m_enmTrunkType = kIntNetTrunkType_None;
653	else if (strTrunkType == "whatever")
654	m_enmTrunkType = kIntNetTrunkType_WhateverNone;
655	else if (strTrunkType == "netflt")
656	m_enmTrunkType = kIntNetTrunkType_NetFlt;
657	else if (strTrunkType == "netadp")
658	m_enmTrunkType = kIntNetTrunkType_NetAdp;
659	else
660	throw ConfigFileError(RTCStringFmt("Invalid DHCPServer/@trunkType value: %s", strTrunkType.c_str()));
661
662	if ( m_enmTrunkType == kIntNetTrunkType_NetFlt
663	\|\| m_enmTrunkType == kIntNetTrunkType_NetAdp)
664	{
665	RTCString strTrunk;
666	if (!server->getAttributeValue("trunkName", &strTrunk))
667	throw ConfigFileError("DHCPServer/@trunkName missing");
668	m_strTrunk = strTrunk.c_str();
669	}
670	else
671	m_strTrunk = "";
672
673	getIPv4AddrAttribute(server, "IPAddress", &m_IPv4Address);
674	getIPv4AddrAttribute(server, "networkMask", &m_IPv4Netmask);
675	getIPv4AddrAttribute(server, "lowerIP", &m_IPv4PoolFirst);
676	getIPv4AddrAttribute(server, "upperIP", &m_IPv4PoolLast);
677
678	/*
679	* DHCPServer children
680	*/
681	xml::NodesLoop it(*server);
682	const xml::ElementNode *node;
683	while ((node = it.forAllNodes()) != NULL)
684	{
685	/*
686	* Global options
687	*/
688	if (node->nameEquals("Options"))
689	{
690	parseGlobalOptions(node);
691	}
692
693	/*
694	* Per-VM configuration
695	*/
696	else if (node->nameEquals("Config"))
697	{
698	parseVMConfig(node);
699	}
700	}
701	}
702
703
704	void Config::parseGlobalOptions(const xml::ElementNode *options)
705	{
706	xml::NodesLoop it(*options);
707	const xml::ElementNode *node;
708	while ((node = it.forAllNodes()) != NULL)
709	{
710	if (node->nameEquals("Option"))
711	{
712	parseOption(node, m_GlobalOptions);
713	}
714	else
715	{
716	throw ConfigFileError(RTCStringFmt("Unexpected element \"%s\"",
717	node->getName()));
718	}
719	}
720	}
721
722
723	/*
724	* VM Config entries are generated automatically from VirtualBox.xml
725	* with the MAC fetched from the VM config. The client id is nowhere
726	* in the picture there, so VM config is indexed with plain RTMAC, not
727	* ClientId (also see getOptions below).
728	*/
729	void Config::parseVMConfig(const xml::ElementNode *config)
730	{
731	RTMAC mac;
732	int rc;
733
734	RTCString strMac;
735	bool fHasMac = config->getAttributeValue("MACAddress", &strMac);
736	if (!fHasMac)
737	throw ConfigFileError(RTCStringFmt("Config missing MACAddress attribute"));
738
739	rc = parseMACAddress(mac, strMac);
740	if (RT_FAILURE(rc))
741	{
742	throw ConfigFileError(RTCStringFmt("Malformed MACAddress attribute \"%s\"",
743	strMac.c_str()));
744	}
745
746	vmmap_t::iterator vmit( m_VMMap.find(mac) );
747	if (vmit != m_VMMap.end())
748	{
749	throw ConfigFileError(RTCStringFmt("Duplicate Config for MACAddress \"%s\"",
750	strMac.c_str()));
751	}
752
753	optmap_t &vmopts = m_VMMap[mac];
754
755	xml::NodesLoop it(*config);
756	const xml::ElementNode *node;
757	while ((node = it.forAllNodes()) != NULL)
758	if (node->nameEquals("Option"))
759	parseOption(node, vmopts);
760	else
761	throw ConfigFileError(RTCStringFmt("Unexpected element \"%s\"",
762	node->getName()));
763	}
764
765
766	int Config::parseMACAddress(RTMAC &aMac, const RTCString &aStr)
767	{
768	RTMAC mac;
769	int rc;
770
771	rc = RTNetStrToMacAddr(aStr.c_str(), &mac);
772	if (RT_FAILURE(rc))
773	return rc;
774	if (rc == VWRN_TRAILING_CHARS)
775	return VERR_INVALID_PARAMETER;
776
777	aMac = mac;
778	return VINF_SUCCESS;
779	}
780
781
782	int Config::parseClientId(OptClientId &aId, const RTCString &aStr)
783	{
784	RT_NOREF(aId, aStr);
785	return VERR_GENERAL_FAILURE;
786	}
787
788
789	/*
790	* Parse <Option/> element and add the option to the specified optmap.
791	*/
792	void Config::parseOption(const xml::ElementNode *option, optmap_t &optmap)
793	{
794	int rc;
795
796	uint8_t u8Opt;
797	RTCString strName;
798	bool fHasName = option->getAttributeValue("name", &strName);
799	if (fHasName)
800	{
801	const char *pcszName = strName.c_str();
802
803	rc = RTStrToUInt8Full(pcszName, 10, &u8Opt);
804	if (rc != VINF_SUCCESS) /* no warnings either */
805	throw ConfigFileError(RTCStringFmt("Bad option \"%s\"", pcszName));
806
807	}
808	else
809	throw ConfigFileError("missing option name");
810
811
812	uint32_t u32Enc = 0; /* XXX: DhcpOptEncoding_Legacy */
813	RTCString strEncoding;
814	bool fHasEncoding = option->getAttributeValue("encoding", &strEncoding);
815	if (fHasEncoding)
816	{
817	const char *pcszEnc = strEncoding.c_str();
818
819	rc = RTStrToUInt32Full(pcszEnc, 10, &u32Enc);
820	if (rc != VINF_SUCCESS) /* no warnings either */
821	throw ConfigFileError(RTCStringFmt("Bad encoding \"%s\"", pcszEnc));
822
823	switch (u32Enc)
824	{
825	case 0: /* XXX: DhcpOptEncoding_Legacy */
826	case 1: /* XXX: DhcpOptEncoding_Hex */
827	break;
828	default:
829	throw ConfigFileError(RTCStringFmt("Unknown encoding \"%s\"", pcszEnc));
830	}
831	}
832
833
834	/* value may be omitted for OptNoValue options like rapid commit */
835	RTCString strValue;
836	option->getAttributeValue("value", &strValue);
837
838	/* XXX: TODO: encoding, handle hex */
839	DhcpOption *opt = DhcpOption::parse(u8Opt, u32Enc, strValue.c_str());
840	if (opt == NULL)
841	throw ConfigFileError(RTCStringFmt("Bad option \"%s\"", strName.c_str()));
842
843	optmap << opt;
844	}
845
846
847	/*
848	* Set m_strBaseName to sanitized version of m_strNetwork that can be
849	* used in a path component.
850	*/
851	void Config::sanitizeBaseName()
852	{
853	int rc;
854
855	if (m_strNetwork.empty())
856	return;
857
858	char szBaseName[RTPATH_MAX];
859	rc = RTStrCopy(szBaseName, sizeof(szBaseName), m_strNetwork.c_str());
860	if (RT_FAILURE(rc))
861	return;
862
863	for (char p = szBaseName; p != '\0'; ++p)
864	{
865	if (RTPATH_IS_SEP(*p))
866	{
867	*p = '_';
868	}
869	}
870
871	m_strBaseName.assign(szBaseName);
872	}
873
874
875	optmap_t Config::getOptions(const OptParameterRequest &reqOpts,
876	const ClientId &id,
877	const OptVendorClassId &vendor) const
878	{
879	optmap_t optmap;
880
881	const optmap_t *vmopts = NULL;
882	vmmap_t::const_iterator vmit( m_VMMap.find(id.mac()) );
883	if (vmit != m_VMMap.end())
884	vmopts = &vmit->second;
885
886	RT_NOREF(vendor); /* not yet */
887
888
889	optmap << new OptSubnetMask(m_IPv4Netmask);
890
891	const OptParameterRequest::value_t& reqValue = reqOpts.value();
892	for (octets_t::const_iterator itOptReq = reqValue.begin(); itOptReq != reqValue.end(); ++itOptReq)
893	{
894	uint8_t optreq = *itOptReq;
895	std::cout << ">>> requested option " << (int)optreq << std::endl;
896
897	if (optreq == OptSubnetMask::optcode)
898	{
899	std::cout << "... always supplied" << std::endl;
900	continue;
901	}
902
903	if (vmopts != NULL)
904	{
905	optmap_t::const_iterator it( vmopts->find(optreq) );
906	if (it != vmopts->end())
907	{
908	optmap << it->second;
909	std::cout << "... found in VM options" << std::endl;
910	continue;
911	}
912	}
913
914	optmap_t::const_iterator it( m_GlobalOptions.find(optreq) );
915	if (it != m_GlobalOptions.end())
916	{
917	optmap << it->second;
918	std::cout << "... found in global options" << std::endl;
919	continue;
920	}
921
922	// std::cout << "... not found" << std::endl;
923	}
924
925
926	/* XXX: testing ... */
927	if (vmopts != NULL)
928	{
929	for (optmap_t::const_iterator it = vmopts->begin(); it != vmopts->end(); ++it) {
930	std::shared_ptr<DhcpOption> opt(it->second);
931	if (optmap.count(opt->optcode()) == 0 && opt->optcode() > 127)
932	{
933	optmap << opt;
934	std::cout << "... forcing VM option " << (int)opt->optcode() << std::endl;
935	}
936	}
937	}
938
939	for (optmap_t::const_iterator it = m_GlobalOptions.begin(); it != m_GlobalOptions.end(); ++it) {
940	std::shared_ptr<DhcpOption> opt(it->second);
941	if (optmap.count(opt->optcode()) == 0 && opt->optcode() > 127)
942	{
943	optmap << opt;
944	std::cout << "... forcing global option " << (int)opt->optcode() << std::endl;
945	}
946	}
947
948	return optmap;
949	}

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source: vbox/trunk/src/VBox/NetworkServices/Dhcpd/Config.cpp@ 78333

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