VBoxNetAdpCtl.cpp@ 78229

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1	/* $Id: VBoxNetAdpCtl.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
2	/** @file
3	* Apps - VBoxAdpCtl, Configuration tool for vboxnetX adapters.
4	*/
5
6	/*
7	* Copyright (C) 2009-2019 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
19
20	/*********************************************************************************************************************************
21	* Header Files *
22	*********************************************************************************************************************************/
23	#include <list>
24	#include <errno.h>
25	#include <stdio.h>
26	#include <stdarg.h>
27	#include <stdlib.h>
28	#include <string.h>
29	#include <unistd.h>
30	#include <sys/wait.h>
31	#include <sys/ioctl.h>
32	#include <sys/stat.h>
33	#include <fcntl.h>
34	#ifdef RT_OS_LINUX
35	# include <arpa/inet.h>
36	# include <net/if.h>
37	# include <linux/types.h>
38	/* Older versions of ethtool.h rely on these: */
39	typedef unsigned long long u64;
40	typedef __uint32_t u32;
41	typedef __uint16_t u16;
42	typedef __uint8_t u8;
43	# include <limits.h> /* for INT_MAX */
44	# include <linux/ethtool.h>
45	# include <linux/sockios.h>
46	#endif
47	#ifdef RT_OS_SOLARIS
48	# include <sys/ioccom.h>
49	#endif
50
51	#define NOREF(x) (void)x
52
53	/** @todo Error codes must be moved to some header file */
54	#define ADPCTLERR_BAD_NAME 2
55	#define ADPCTLERR_NO_CTL_DEV 3
56	#define ADPCTLERR_IOCTL_FAILED 4
57	#define ADPCTLERR_SOCKET_FAILED 5
58
59	/** @todo These are duplicates from src/VBox/HostDrivers/VBoxNetAdp/VBoxNetAdpInternal.h */
60	#define VBOXNETADP_CTL_DEV_NAME "/dev/vboxnetctl"
61	#define VBOXNETADP_MAX_INSTANCES 128
62	#define VBOXNETADP_NAME "vboxnet"
63	#define VBOXNETADP_MAX_NAME_LEN 32
64	#define VBOXNETADP_CTL_ADD _IOWR('v', 1, VBOXNETADPREQ)
65	#define VBOXNETADP_CTL_REMOVE _IOW('v', 2, VBOXNETADPREQ)
66	typedef struct VBoxNetAdpReq
67	{
68	char szName[VBOXNETADP_MAX_NAME_LEN];
69	} VBOXNETADPREQ;
70	typedef VBOXNETADPREQ *PVBOXNETADPREQ;
71
72	#define VBOXADPCTL_IFCONFIG_PATH1 "/sbin/ifconfig"
73	#define VBOXADPCTL_IFCONFIG_PATH2 "/bin/ifconfig"
74
75
76	static void showUsage(void)
77	{
78	fprintf(stderr, "Usage: VBoxNetAdpCtl <adapter> <address> ([netmask <address>] \| remove)\n");
79	fprintf(stderr, " \| VBoxNetAdpCtl [<adapter>] add\n");
80	fprintf(stderr, " \| VBoxNetAdpCtl <adapter> remove\n");
81	}
82
83
84	/*
85	* A wrapper on standard list that provides '<<' operator for adding several list members in a single
86	* line dynamically. For example: "CmdList(arg1) << arg2 << arg3" produces a list with three members.
87	*/
88	class CmdList
89	{
90	public:
91	/** Creates an empty list. */
92	CmdList() {};
93	/** Creates a list with a single member. */
94	CmdList(const char *pcszCommand) { m_list.push_back(pcszCommand); };
95	/** Provides access to the underlying standard list. */
96	const std::list<const char *>& getList(void) const { return m_list; };
97	/** Adds a member to the list. */
98	CmdList& operator<<(const char *pcszArgument);
99	private:
100	std::list<const char *>m_list;
101	};
102
103	CmdList& CmdList::operator<<(const char *pcszArgument)
104	{
105	m_list.push_back(pcszArgument);
106	return *this;
107	}
108
109	/** Simple helper to distinguish IPv4 and IPv6 addresses. */
110	inline bool isAddrV6(const char *pcszAddress)
111	{
112	return !!(strchr(pcszAddress, ':'));
113	}
114
115
116	/*********************************************************************************************************************************
117	* Generic address commands. *
118	*********************************************************************************************************************************/
119
120	/**
121	* The base class for all address manipulation commands. While being an abstract class,
122	* it provides a generic implementation of 'set' and 'remove' methods, which rely on
123	* pure virtual methods like 'addV4' and 'removeV4' to perform actual command execution.
124	*/
125	class AddressCommand
126	{
127	public:
128	AddressCommand() : m_pszPath(0) {};
129	virtual ~AddressCommand() {};
130
131	/** returns true if underlying command (executable) is present in the system. */
132	bool isAvailable(void)
133	{ struct stat s; return (!stat(m_pszPath, &s) && S_ISREG(s.st_mode)); };
134
135	/*
136	* Someday we may want to support several IP addresses per adapter, but for now we
137	* have 'set' method only, which replaces all addresses with the one specifed.
138	*
139	* virtual int add(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0) = 0;
140	*/
141	/** replace existing address(es) */
142	virtual int set(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0);
143	/** remove address */
144	virtual int remove(const char pcszAdapter, const char pcszAddress);
145	protected:
146	/** IPv4-specific handler used by generic implementation of 'set' method if 'setV4' is not supported. */
147	virtual int addV4(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0) = 0;
148	/** IPv6-specific handler used by generic implementation of 'set' method. */
149	virtual int addV6(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0) = 0;
150	/** IPv4-specific handler used by generic implementation of 'set' method. */
151	virtual int setV4(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0) = 0;
152	/** IPv4-specific handler used by generic implementation of 'remove' method. */
153	virtual int removeV4(const char pcszAdapter, const char pcszAddress) = 0;
154	/** IPv6-specific handler used by generic implementation of 'remove' method. */
155	virtual int removeV6(const char pcszAdapter, const char pcszAddress) = 0;
156	/** Composes the argument list of command that obtains all addresses assigned to the adapter. */
157	virtual CmdList getShowCommand(const char *pcszAdapter) const = 0;
158
159	/** Prepares an array of C strings needed for 'exec' call. */
160	char * const * allocArgv(const CmdList& commandList);
161	/** Hides process creation details. To be used in derived classes. */
162	int execute(CmdList& commandList);
163
164	/** A path to executable command. */
165	const char *m_pszPath;
166	private:
167	/** Removes all previously asssigned addresses of a particular protocol family. */
168	int removeAddresses(const char pcszAdapter, const char pcszFamily);
169	};
170
171	/*
172	* A generic implementation of 'ifconfig' command for all platforms.
173	*/
174	class CmdIfconfig : public AddressCommand
175	{
176	public:
177	CmdIfconfig()
178	{
179	struct stat s;
180	if ( !stat(VBOXADPCTL_IFCONFIG_PATH1, &s)
181	&& S_ISREG(s.st_mode))
182	m_pszPath = (char*)VBOXADPCTL_IFCONFIG_PATH1;
183	else
184	m_pszPath = (char*)VBOXADPCTL_IFCONFIG_PATH2;
185	};
186
187	protected:
188	/** Returns platform-specific subcommand to add an address. */
189	virtual const char *addCmdArg(void) const = 0;
190	/** Returns platform-specific subcommand to remove an address. */
191	virtual const char *delCmdArg(void) const = 0;
192	virtual CmdList getShowCommand(const char *pcszAdapter) const
193	{ return CmdList(pcszAdapter); };
194	virtual int addV4(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0)
195	{ return ENOTSUP; NOREF(pcszAdapter); NOREF(pcszAddress); NOREF(pcszNetmask); };
196	virtual int addV6(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0)
197	{
198	return execute(CmdList(pcszAdapter) << "inet6" << addCmdArg() << pcszAddress);
199	NOREF(pcszNetmask);
200	};
201	virtual int setV4(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0)
202	{
203	if (!pcszNetmask)
204	return execute(CmdList(pcszAdapter) << pcszAddress);
205	return execute(CmdList(pcszAdapter) << pcszAddress << "netmask" << pcszNetmask);
206	};
207	virtual int removeV4(const char pcszAdapter, const char pcszAddress)
208	{ return execute(CmdList(pcszAdapter) << delCmdArg() << pcszAddress); };
209	virtual int removeV6(const char pcszAdapter, const char pcszAddress)
210	{ return execute(CmdList(pcszAdapter) << "inet6" << delCmdArg() << pcszAddress); };
211	};
212
213
214	/*********************************************************************************************************************************
215	* Platform-specific commands *
216	*********************************************************************************************************************************/
217
218	class CmdIfconfigLinux : public CmdIfconfig
219	{
220	protected:
221	virtual int removeV4(const char pcszAdapter, const char pcszAddress)
222	{ return execute(CmdList(pcszAdapter) << "0.0.0.0"); NOREF(pcszAddress); };
223	virtual const char *addCmdArg(void) const { return "add"; };
224	virtual const char *delCmdArg(void) const { return "del"; };
225	};
226
227	class CmdIfconfigDarwin : public CmdIfconfig
228	{
229	protected:
230	virtual const char *addCmdArg(void) const { return "add"; };
231	virtual const char *delCmdArg(void) const { return "delete"; };
232	};
233
234	class CmdIfconfigSolaris : public CmdIfconfig
235	{
236	public:
237	virtual int set(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0)
238	{
239	const char *pcszFamily = isAddrV6(pcszAddress) ? "inet6" : "inet";
240	if (execute(CmdList(pcszAdapter) << pcszFamily))
241	execute(CmdList(pcszAdapter) << pcszFamily << "plumb" << "up");
242	return CmdIfconfig::set(pcszAdapter, pcszAddress, pcszNetmask);
243	};
244	protected:
245	/* We can umplumb IPv4 interfaces only! */
246	virtual int removeV4(const char pcszAdapter, const char pcszAddress)
247	{
248	int rc = CmdIfconfig::removeV4(pcszAdapter, pcszAddress);
249	execute(CmdList(pcszAdapter) << "inet" << "unplumb");
250	return rc;
251	};
252	virtual const char *addCmdArg(void) const { return "addif"; };
253	virtual const char *delCmdArg(void) const { return "removeif"; };
254	};
255
256
257	#ifdef RT_OS_LINUX
258	/*
259	* Helper class to incapsulate IPv4 address conversion.
260	*/
261	class AddressIPv4
262	{
263	public:
264	AddressIPv4(const char pcszAddress, const char pcszNetmask = 0)
265	{
266	if (pcszNetmask)
267	m_Prefix = maskToPrefix(pcszNetmask);
268	else
269	{
270	/*
271	* Since guessing network mask is probably futile we simply use 24,
272	* as it matches our defaults. When non-default values are used
273	* providing a proper netmask is up to the user.
274	*/
275	m_Prefix = 24;
276	}
277	inet_pton(AF_INET, pcszAddress, &(m_Address.sin_addr));
278	snprintf(m_szAddressAndMask, sizeof(m_szAddressAndMask), "%s/%d", pcszAddress, m_Prefix);
279	m_Broadcast.sin_addr.s_addr = computeBroadcast(m_Address.sin_addr.s_addr, m_Prefix);
280	inet_ntop(AF_INET, &(m_Broadcast.sin_addr), m_szBroadcast, sizeof(m_szBroadcast));
281	}
282	const char *getBroadcast() const { return m_szBroadcast; };
283	const char *getAddressAndMask() const { return m_szAddressAndMask; };
284	private:
285	unsigned int maskToPrefix(const char *pcszNetmask);
286	unsigned long computeBroadcast(unsigned long ulAddress, unsigned int uPrefix);
287
288	unsigned int m_Prefix;
289	struct sockaddr_in m_Address;
290	struct sockaddr_in m_Broadcast;
291	char m_szAddressAndMask[INET_ADDRSTRLEN + 3]; /* e.g. 192.168.56.101/24 */
292	char m_szBroadcast[INET_ADDRSTRLEN];
293	};
294
295	unsigned int AddressIPv4::maskToPrefix(const char *pcszNetmask)
296	{
297	unsigned cBits = 0;
298	unsigned m[4];
299
300	if (sscanf(pcszNetmask, "%u.%u.%u.%u", &m[0], &m[1], &m[2], &m[3]) == 4)
301	{
302	for (int i = 0; i < 4 && m[i]; ++i)
303	{
304	int mask = m[i];
305	while (mask & 0x80)
306	{
307	cBits++;
308	mask <<= 1;
309	}
310	}
311	}
312	return cBits;
313	}
314
315	unsigned long AddressIPv4::computeBroadcast(unsigned long ulAddress, unsigned int uPrefix)
316	{
317	/* Note: the address is big-endian. */
318	unsigned long ulNetworkMask = (1l << uPrefix) - 1;
319	return (ulAddress & ulNetworkMask) \| ~ulNetworkMask;
320	}
321
322
323	/*
324	* Linux-specific implementation of 'ip' command, as other platforms do not support it.
325	*/
326	class CmdIpLinux : public AddressCommand
327	{
328	public:
329	CmdIpLinux() { m_pszPath = "/sbin/ip"; };
330	/**
331	* IPv4 and IPv6 syntax is the same, so we override `remove` instead of implementing
332	* family-specific commands. It would be easier to use the same body in both
333	* 'removeV4' and 'removeV6', so we override 'remove' to illustrate how to do common
334	* implementation.
335	*/
336	virtual int remove(const char pcszAdapter, const char pcszAddress)
337	{ return execute(CmdList("addr") << "del" << pcszAddress << "dev" << pcszAdapter); };
338	protected:
339	virtual int addV4(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0)
340	{
341	AddressIPv4 addr(pcszAddress, pcszNetmask);
342	bringUp(pcszAdapter);
343	return execute(CmdList("addr") << "add" << addr.getAddressAndMask() <<
344	"broadcast" << addr.getBroadcast() << "dev" << pcszAdapter);
345	};
346	virtual int addV6(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0)
347	{
348	bringUp(pcszAdapter);
349	return execute(CmdList("addr") << "add" << pcszAddress << "dev" << pcszAdapter);
350	NOREF(pcszNetmask);
351	};
352	/**
353	* Our command does not support 'replacing' addresses. Reporting this fact to generic implementation
354	* of 'set' causes it to remove all assigned addresses, then 'add' the new one.
355	*/
356	virtual int setV4(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask = 0)
357	{ return ENOTSUP; NOREF(pcszAdapter); NOREF(pcszAddress); NOREF(pcszNetmask); };
358	/** We use family-agnostic command syntax. See 'remove' above. */
359	virtual int removeV4(const char pcszAdapter, const char pcszAddress)
360	{ return ENOTSUP; NOREF(pcszAdapter); NOREF(pcszAddress); };
361	/** We use family-agnostic command syntax. See 'remove' above. */
362	virtual int removeV6(const char pcszAdapter, const char pcszAddress)
363	{ return ENOTSUP; NOREF(pcszAdapter); NOREF(pcszAddress); };
364	virtual CmdList getShowCommand(const char *pcszAdapter) const
365	{ return CmdList("addr") << "show" << "dev" << pcszAdapter; };
366	private:
367	/** Brings up the adapter */
368	void bringUp(const char *pcszAdapter)
369	{ execute(CmdList("link") << "set" << "dev" << pcszAdapter << "up"); };
370	};
371	#endif /* RT_OS_LINUX */
372
373
374	/*********************************************************************************************************************************
375	* Generic address command implementations *
376	*********************************************************************************************************************************/
377
378	int AddressCommand::set(const char pcszAdapter, const char pcszAddress, const char *pcszNetmask)
379	{
380	if (isAddrV6(pcszAddress))
381	{
382	removeAddresses(pcszAdapter, "inet6");
383	return addV6(pcszAdapter, pcszAddress, pcszNetmask);
384	}
385	int rc = setV4(pcszAdapter, pcszAddress, pcszNetmask);
386	if (rc == ENOTSUP)
387	{
388	removeAddresses(pcszAdapter, "inet");
389	rc = addV4(pcszAdapter, pcszAddress, pcszNetmask);
390	}
391	return rc;
392	}
393
394	int AddressCommand::remove(const char pcszAdapter, const char pcszAddress)
395	{
396	if (isAddrV6(pcszAddress))
397	return removeV6(pcszAdapter, pcszAddress);
398	return removeV4(pcszAdapter, pcszAddress);
399	}
400
401	/*
402	* Allocate an array of exec arguments. In addition to arguments provided
403	* we need to include the full path to the executable as well as "terminating"
404	* null pointer marking the end of the array.
405	*/
406	char * const * AddressCommand::allocArgv(const CmdList& list)
407	{
408	int i = 0;
409	std::list<const char *>::const_iterator it;
410	const char argv = (const char )calloc(list.getList().size() + 2, sizeof(const char *));
411	if (argv)
412	{
413	argv[i++] = m_pszPath;
414	for (it = list.getList().begin(); it != list.getList().end(); ++it)
415	argv[i++] = *it;
416	argv[i++] = NULL;
417	}
418	return (char * const*)argv;
419	}
420
421	int AddressCommand::execute(CmdList& list)
422	{
423	char * const pEnv[] = { (char*)"LC_ALL=C", NULL };
424	char * const* argv = allocArgv(list);
425	if (argv == NULL)
426	return EXIT_FAILURE;
427
428	int rc = EXIT_SUCCESS;
429	pid_t childPid = fork();
430	switch (childPid)
431	{
432	case -1: /* Something went wrong. */
433	perror("fork() failed");
434	rc = EXIT_FAILURE;
435	break;
436	case 0: /* Child process. */
437	if (execve(argv[0], argv, pEnv) == -1)
438	rc = EXIT_FAILURE;
439	break;
440	default: /* Parent process. */
441	waitpid(childPid, &rc, 0);
442	break;
443	}
444
445	free((void*)argv);
446	return rc;
447	}
448
449	#define MAX_ADDRESSES 128
450	#define MAX_ADDRLEN 64
451
452	int AddressCommand::removeAddresses(const char pcszAdapter, const char pcszFamily)
453	{
454	char szBuf[1024];
455	char aszAddresses[MAX_ADDRESSES][MAX_ADDRLEN];
456	int rc = EXIT_SUCCESS;
457	int fds[2];
458	char * const * argv = allocArgv(getShowCommand(pcszAdapter));
459	char * const envp[] = { (char*)"LC_ALL=C", NULL };
460
461	memset(aszAddresses, 0, sizeof(aszAddresses));
462
463	rc = pipe(fds);
464	if (rc < 0)
465	return errno;
466
467	pid_t pid = fork();
468	if (pid < 0)
469	return errno;
470
471	if (pid == 0)
472	{
473	/* child */
474	close(fds[0]);
475	close(STDOUT_FILENO);
476	rc = dup2(fds[1], STDOUT_FILENO);
477	if (rc >= 0)
478	if (execve(argv[0], argv, envp) == -1)
479	return errno;
480	return rc;
481	}
482
483	/* parent */
484	close(fds[1]);
485	FILE *fp = fdopen(fds[0], "r");
486	if (!fp)
487	return false;
488
489	int cAddrs;
490	for (cAddrs = 0; cAddrs < MAX_ADDRESSES && fgets(szBuf, sizeof(szBuf), fp);)
491	{
492	int cbSkipWS = strspn(szBuf, " \t");
493	char *pszWord = strtok(szBuf + cbSkipWS, " ");
494	/* We are concerned with particular family address lines only. */
495	if (!pszWord \|\| strcmp(pszWord, pcszFamily))
496	continue;
497
498	pszWord = strtok(NULL, " ");
499
500	/* Skip "addr:" word if present. */
501	if (pszWord && !strcmp(pszWord, "addr:"))
502	pszWord = strtok(NULL, " ");
503
504	/* Skip link-local address lines. */
505	if (!pszWord \|\| !strncmp(pszWord, "fe80", 4))
506	continue;
507	strncpy(aszAddresses[cAddrs++], pszWord, MAX_ADDRLEN-1);
508	}
509	fclose(fp);
510
511	for (int i = 0; i < cAddrs && rc == EXIT_SUCCESS; i++)
512	rc = remove(pcszAdapter, aszAddresses[i]);
513
514	return rc;
515	}
516
517
518	/*********************************************************************************************************************************
519	* Adapter creation/removal implementations *
520	*********************************************************************************************************************************/
521
522	/*
523	* A generic implementation of adapter creation/removal ioctl calls.
524	*/
525	class Adapter
526	{
527	public:
528	int add(char *pszNameInOut);
529	int remove(const char *pcszName);
530	int checkName(const char pcszNameIn, char pszNameOut, size_t cbNameOut);
531	protected:
532	virtual int doIOCtl(unsigned long iCmd, VBOXNETADPREQ *pReq);
533	};
534
535	/*
536	* Solaris does not support dynamic creation/removal of adapters.
537	*/
538	class AdapterSolaris : public Adapter
539	{
540	protected:
541	virtual int doIOCtl(unsigned long iCmd, VBOXNETADPREQ *pReq)
542	{ return 1 /ENOTSUP/; NOREF(iCmd); NOREF(pReq); };
543	};
544
545	#if defined(RT_OS_LINUX)
546	/*
547	* Linux implementation provides a 'workaround' to obtain adapter speed.
548	*/
549	class AdapterLinux : public Adapter
550	{
551	public:
552	int getSpeed(const char pszName, unsigned puSpeed);
553	};
554
555	int AdapterLinux::getSpeed(const char pszName, unsigned puSpeed)
556	{
557	struct ifreq IfReq;
558	struct ethtool_value EthToolVal;
559	struct ethtool_cmd EthToolReq;
560	int fd = socket(AF_INET, SOCK_DGRAM, 0);
561	if (fd < 0)
562	{
563	fprintf(stderr, "VBoxNetAdpCtl: Error while retrieving link "
564	"speed for %s: ", pszName);
565	perror("VBoxNetAdpCtl: failed to open control socket");
566	return ADPCTLERR_SOCKET_FAILED;
567	}
568	/* Get link status first. */
569	memset(&EthToolVal, 0, sizeof(EthToolVal));
570	memset(&IfReq, 0, sizeof(IfReq));
571	snprintf(IfReq.ifr_name, sizeof(IfReq.ifr_name), "%s", pszName);
572
573	EthToolVal.cmd = ETHTOOL_GLINK;
574	IfReq.ifr_data = (caddr_t)&EthToolVal;
575	int rc = ioctl(fd, SIOCETHTOOL, &IfReq);
576	if (rc == 0)
577	{
578	if (EthToolVal.data)
579	{
580	memset(&IfReq, 0, sizeof(IfReq));
581	snprintf(IfReq.ifr_name, sizeof(IfReq.ifr_name), "%s", pszName);
582	EthToolReq.cmd = ETHTOOL_GSET;
583	IfReq.ifr_data = (caddr_t)&EthToolReq;
584	rc = ioctl(fd, SIOCETHTOOL, &IfReq);
585	if (rc == 0)
586	{
587	*puSpeed = EthToolReq.speed;
588	}
589	else
590	{
591	fprintf(stderr, "VBoxNetAdpCtl: Error while retrieving link "
592	"speed for %s: ", pszName);
593	perror("VBoxNetAdpCtl: ioctl failed");
594	rc = ADPCTLERR_IOCTL_FAILED;
595	}
596	}
597	else
598	*puSpeed = 0;
599	}
600	else
601	{
602	fprintf(stderr, "VBoxNetAdpCtl: Error while retrieving link "
603	"status for %s: ", pszName);
604	perror("VBoxNetAdpCtl: ioctl failed");
605	rc = ADPCTLERR_IOCTL_FAILED;
606	}
607
608	close(fd);
609	return rc;
610	}
611	#endif /* defined(RT_OS_LINUX) */
612
613	int Adapter::add(char pszName / in/out */)
614	{
615	VBOXNETADPREQ Req;
616	memset(&Req, '\0', sizeof(Req));
617	snprintf(Req.szName, sizeof(Req.szName), "%s", pszName);
618	int rc = doIOCtl(VBOXNETADP_CTL_ADD, &Req);
619	if (rc == 0)
620	strncpy(pszName, Req.szName, VBOXNETADP_MAX_NAME_LEN);
621	return rc;
622	}
623
624	int Adapter::remove(const char *pcszName)
625	{
626	VBOXNETADPREQ Req;
627	memset(&Req, '\0', sizeof(Req));
628	snprintf(Req.szName, sizeof(Req.szName), "%s", pcszName);
629	return doIOCtl(VBOXNETADP_CTL_REMOVE, &Req);
630	}
631
632	int Adapter::checkName(const char pcszNameIn, char pszNameOut, size_t cbNameOut)
633	{
634	int iAdapterIndex = -1;
635
636	if ( strlen(pcszNameIn) >= VBOXNETADP_MAX_NAME_LEN
637	\|\| sscanf(pcszNameIn, "vboxnet%d", &iAdapterIndex) != 1
638	\|\| iAdapterIndex < 0 \|\| iAdapterIndex >= VBOXNETADP_MAX_INSTANCES )
639	{
640	fprintf(stderr, "VBoxNetAdpCtl: Setting configuration for '%s' is not supported.\n", pcszNameIn);
641	return ADPCTLERR_BAD_NAME;
642	}
643	snprintf(pszNameOut, cbNameOut, "vboxnet%d", iAdapterIndex);
644	if (strcmp(pszNameOut, pcszNameIn))
645	{
646	fprintf(stderr, "VBoxNetAdpCtl: Invalid adapter name '%s'.\n", pcszNameIn);
647	return ADPCTLERR_BAD_NAME;
648	}
649
650	return 0;
651	}
652
653	int Adapter::doIOCtl(unsigned long iCmd, VBOXNETADPREQ *pReq)
654	{
655	int fd = open(VBOXNETADP_CTL_DEV_NAME, O_RDWR);
656	if (fd == -1)
657	{
658	fprintf(stderr, "VBoxNetAdpCtl: Error while %s %s: ",
659	iCmd == VBOXNETADP_CTL_REMOVE ? "removing" : "adding",
660	pReq->szName[0] ? pReq->szName : "new interface");
661	perror("failed to open " VBOXNETADP_CTL_DEV_NAME);
662	return ADPCTLERR_NO_CTL_DEV;
663	}
664
665	int rc = ioctl(fd, iCmd, pReq);
666	if (rc == -1)
667	{
668	fprintf(stderr, "VBoxNetAdpCtl: Error while %s %s: ",
669	iCmd == VBOXNETADP_CTL_REMOVE ? "removing" : "adding",
670	pReq->szName[0] ? pReq->szName : "new interface");
671	perror("VBoxNetAdpCtl: ioctl failed for " VBOXNETADP_CTL_DEV_NAME);
672	rc = ADPCTLERR_IOCTL_FAILED;
673	}
674
675	close(fd);
676
677	return rc;
678	}
679
680
681	/*********************************************************************************************************************************
682	* Main logic, argument parsing, etc. *
683	*********************************************************************************************************************************/
684
685	#if defined(RT_OS_LINUX)
686	static CmdIfconfigLinux g_ifconfig;
687	static AdapterLinux g_adapter;
688	#elif defined(RT_OS_SOLARIS)
689	static CmdIfconfigSolaris g_ifconfig;
690	static AdapterSolaris g_adapter;
691	#else
692	static CmdIfconfigDarwin g_ifconfig;
693	static Adapter g_adapter;
694	#endif
695
696	static AddressCommand& chooseAddressCommand()
697	{
698	#if defined(RT_OS_LINUX)
699	static CmdIpLinux g_ip;
700	if (g_ip.isAvailable())
701	return g_ip;
702	#endif
703	return g_ifconfig;
704	}
705
706	int main(int argc, char *argv[])
707	{
708	char szAdapterName[VBOXNETADP_MAX_NAME_LEN];
709	int rc = EXIT_SUCCESS;
710
711	AddressCommand& cmd = chooseAddressCommand();
712
713	if (argc < 2)
714	{
715	fprintf(stderr, "Insufficient number of arguments\n\n");
716	showUsage();
717	return 1;
718	}
719	else if (argc == 2 && !strcmp("add", argv[1]))
720	{
721	/* Create a new interface */
722	*szAdapterName = '\0';
723	rc = g_adapter.add(szAdapterName);
724	if (rc == 0)
725	puts(szAdapterName);
726	return rc;
727	}
728	#ifdef RT_OS_LINUX
729	else if (argc == 3 && !strcmp("speed", argv[2]))
730	{
731	/*
732	* This ugly hack is needed for retrieving the link speed on
733	* pre-2.6.33 kernels (see @bugref{6345}).
734	*/
735	if (strlen(argv[1]) >= IFNAMSIZ)
736	{
737	showUsage();
738	return -1;
739	}
740	unsigned uSpeed = 0;
741	rc = g_adapter.getSpeed(argv[1], &uSpeed);
742	if (!rc)
743	printf("%u", uSpeed);
744	return rc;
745	}
746	#endif
747
748	rc = g_adapter.checkName(argv[1], szAdapterName, sizeof(szAdapterName));
749	if (rc)
750	return rc;
751
752	switch (argc)
753	{
754	case 5:
755	{
756	/* Add a netmask to existing interface */
757	if (strcmp("netmask", argv[3]))
758	{
759	fprintf(stderr, "Invalid argument: %s\n\n", argv[3]);
760	showUsage();
761	return 1;
762	}
763	rc = cmd.set(argv[1], argv[2], argv[4]);
764	break;
765	}
766
767	case 4:
768	{
769	/* Remove a single address from existing interface */
770	if (strcmp("remove", argv[3]))
771	{
772	fprintf(stderr, "Invalid argument: %s\n\n", argv[3]);
773	showUsage();
774	return 1;
775	}
776	rc = cmd.remove(argv[1], argv[2]);
777	break;
778	}
779
780	case 3:
781	{
782	if (strcmp("remove", argv[2]) == 0)
783	{
784	/* Remove an existing interface */
785	rc = g_adapter.remove(argv[1]);
786	}
787	else if (strcmp("add", argv[2]) == 0)
788	{
789	/* Create an interface with given name */
790	rc = g_adapter.add(szAdapterName);
791	if (rc == 0)
792	puts(szAdapterName);
793	}
794	else
795	rc = cmd.set(argv[1], argv[2]);
796	break;
797	}
798
799	default:
800	fprintf(stderr, "Invalid number of arguments.\n\n");
801	showUsage();
802	return 1;
803	}
804
805	return rc;
806	}
807

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source: vbox/trunk/src/VBox/HostDrivers/adpctl/VBoxNetAdpCtl.cpp@ 78229

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