slirp.c@ 16573

Last change on this file since 16573 was 16573, checked in by vboxsync, 16 years ago
NAT:fix win burn (exclude poll.h)
Property svn:eol-style set to `native`
File size: 44.4 KB

Line
1	#include "slirp.h"
2	#ifdef RT_OS_OS2
3	# include <paths.h>
4	#endif
5
6	#include <VBox/err.h>
7	#include <VBox/pdmdrv.h>
8	#include <iprt/assert.h>
9	#ifndef RT_OS_WINDOWS
10	#include <poll.h>
11	#endif
12
13	#if !defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) \|\| !defined(RT_OS_WINDOWS)
14
15	# ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
16	# define DO_ENGAGE_EVENT1(so, fdset, label) \
17	do { \
18	FD_SET((so)->s, (fdset)); \
19	UPD_NFDS((so)->s); \
20	} while(0)
21
22
23	# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
24	do { \
25	FD_SET((so)->s, (fdset1)); \
26	FD_SET((so)->s, (fdset2)); \
27	UPD_NFDS((so)->s); \
28	} while(0)
29
30	# define DO_POLL_EVENTS(rc, error, so, events, label) do {} while (0)
31
32	# define DO_CHECK_FD_SET(so, events, fdset) (FD_ISSET((so)->s, fdset))
33	# else /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
34	# define DO_ENGAGE_EVENT1(so, fdset, label) \
35	do { \
36	polls[poll_index].fd = (so)->s; \
37	(so)->so_poll_index = poll_index; \
38	polls[poll_index].events = N_(fdset ## _poll); \
39	poll_index++; \
40	} while(0)
41
42
43	# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
44	do { \
45	polls[poll_index].fd = (so)->s; \
46	(so)->so_poll_index = poll_index; \
47	polls[poll_index].events = N_(fdset1 ## _poll) \| N_(fdset1 ## _poll); \
48	poll_index++; \
49	} while(0)
50
51	# define DO_POLL_EVENTS(rc, error, so, events, label) do {} while (0)
52
53	# define DO_CHECK_FD_SET(so, events, fdset) ( ((so)->so_poll_index != -1) \
54	&& ((so)->so_poll_index <= ndfs) \
55	&& ((so)->s == polls[so->so_poll_index].fd) \
56	&& (polls[(so)->so_poll_index].revents \
57	&& N_(fdset ## _poll)))
58	# endif /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
59
60	# define DO_WIN_CHECK_FD_SET(so, events, fdset ) 0 /* specific for Windows Winsock API */
61	# ifndef RT_OS_WINDOWS
62
63	# ifndef RT_OS_LINUX
64	# define readfds_poll (POLLRDNORM)
65	# define writefds_poll (POLLWRNORM)
66	# define xfds_poll (POLLRDBAND\|POLLWRBAND\|POLLPRI)
67	# else
68	# define readfds_poll (POLLIN)
69	# define writefds_poll (POLLOUT)
70	# define xfds_poll (POLLPRI)
71	# endif
72
73	# define ICMP_ENGAGE_EVENT(so, fdset) \
74	do { \
75	if (pData->icmp_socket.s != -1) \
76	DO_ENGAGE_EVENT1((so), fdset, ICMP); \
77	} while (0)
78	# else /* !RT_OS_WINDOWS */
79	# define ICMP_ENGAGE_EVENT(so, fdset) do {} while(0)
80	#endif /* RT_OS_WINDOWS */
81
82	#else /* defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS) */
83
84	/*
85	* On Windows, we will be notified by IcmpSendEcho2() when the response arrives.
86	* So no call to WSAEventSelect necessary.
87	*/
88	# define ICMP_ENGAGE_EVENT(so, fdset) do {} while(0)
89
90	# define DO_ENGAGE_EVENT1(so, fdset1, label) \
91	do { \
92	rc = WSAEventSelect((so)->s, VBOX_SOCKET_EVENT, FD_ALL_EVENTS); \
93	if (rc == SOCKET_ERROR) \
94	{ \
95	/* This should not happen */ \
96	error = WSAGetLastError(); \
97	LogRel(("WSAEventSelect (" #label ") error %d (so=%x, socket=%s, event=%x)\n", \
98	error, (so), (so)->s, VBOX_SOCKET_EVENT)); \
99	} \
100	} while(0); \
101	CONTINUE(label)
102
103	# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
104	DO_ENGAGE_EVENT1((so), (fdset1), label)
105
106	# define DO_POLL_EVENTS(rc, error, so, events, label) \
107	(rc) = WSAEnumNetworkEvents((so)->s, VBOX_SOCKET_EVENT, (events)); \
108	if ((rc) == SOCKET_ERROR) \
109	{ \
110	(error) = WSAGetLastError(); \
111	LogRel(("WSAEnumNetworkEvents " #label " error %d\n", (error))); \
112	CONTINUE(label); \
113	}
114
115	# define acceptds_win FD_ACCEPT
116	# define acceptds_win_bit FD_ACCEPT_BIT
117
118	# define readfds_win FD_READ
119	# define readfds_win_bit FD_READ_BIT
120
121	# define writefds_win FD_WRITE
122	# define writefds_win_bit FD_WRITE_BIT
123
124	# define xfds_win FD_OOB
125	# define xfds_win_bit FD_OOB_BIT
126
127	# define DO_CHECK_FD_SET(so, events, fdset) \
128	(((events).lNetworkEvents & fdset ## _win) && ((events).iErrorCode[fdset ## _win_bit] == 0))
129
130	# define DO_WIN_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset)
131
132	#endif /* defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS) */
133
134	#define TCP_ENGAGE_EVENT1(so, fdset) \
135	DO_ENGAGE_EVENT1((so), fdset, tcp)
136
137	#define TCP_ENGAGE_EVENT2(so, fdset1, fdset2) \
138	DO_ENGAGE_EVENT2((so), fdset1, fdset2, tcp)
139
140	#define UDP_ENGAGE_EVENT(so, fdset) \
141	DO_ENGAGE_EVENT1((so), fdset, udp)
142
143	#define POLL_TCP_EVENTS(rc, error, so, events) \
144	DO_POLL_EVENTS((rc), (error), (so), (events), tcp)
145
146	#define POLL_UDP_EVENTS(rc, error, so, events) \
147	DO_POLL_EVENTS((rc), (error), (so), (events), udp)
148
149	#define CHECK_FD_SET(so, events, set) \
150	(DO_CHECK_FD_SET((so), (events), set))
151
152	#define WIN_CHECK_FD_SET(so, events, set) \
153	(DO_WIN_CHECK_FD_SET((so), (events), set))
154
155	/*
156	* Loging macros
157	*/
158	#if VBOX_WITH_DEBUG_NAT_SOCKETS
159	# if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
160	# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
161	do { \
162	LogRel((" " #proto " %R[natsock] %R[natwinnetevents]\n", (so), (winevent))); \
163	} while (0)
164	# else
165	# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
166	do { \
167	LogRel((" " #proto " %R[natsock] %s %s %s\n", (so), FD_ISSET((so)->s, (r_fdset))?"READ":"",\
168	FD_ISSET((so)->s, (w_fdset))?"WRITE":"", FD_ISSET((so)->s, (x_fdset))?"OOB":"")); \
169	} while (0)
170	# endif /* VBOX_WITH_DEBUG_NAT_SOCKETS */
171	#else
172	# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) do {} while (0)
173	#endif /* !VBOX_WITH_DEBUG_NAT_SOCKETS */
174
175	#define LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) DO_LOG_NAT_SOCK((so), proto, (winevent), (r_fdset), (w_fdset), (x_fdset))
176
177	static const uint8_t special_ethaddr[6] =
178	{
179	0x52, 0x54, 0x00, 0x12, 0x35, 0x00
180	};
181
182	#ifdef RT_OS_WINDOWS
183
184	static int get_dns_addr_domain(PNATState pData, bool fVerbose,
185	struct in_addr *pdns_addr,
186	const char **ppszDomain)
187	{
188	int rc = 0;
189	FIXED_INFO *FixedInfo = NULL;
190	ULONG BufLen;
191	DWORD ret;
192	IP_ADDR_STRING *pIPAddr;
193	struct in_addr tmp_addr;
194
195	FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO));
196	BufLen = sizeof(FIXED_INFO);
197
198	/** @todo: this API returns all DNS servers, no matter whether the
199	* corresponding network adapter is disabled or not. Maybe replace
200	* this by GetAdapterAddresses(), which is XP/Vista only though. */
201	if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen))
202	{
203	if (FixedInfo)
204	{
205	GlobalFree(FixedInfo);
206	FixedInfo = NULL;
207	}
208	FixedInfo = GlobalAlloc(GPTR, BufLen);
209	}
210
211	if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS)
212	{
213	Log(("GetNetworkParams failed. ret = %08x\n", (u_int)ret ));
214	if (FixedInfo)
215	{
216	GlobalFree(FixedInfo);
217	FixedInfo = NULL;
218	}
219	rc = -1;
220	goto get_dns_prefix;
221	}
222
223	#ifndef VBOX_WITH_MULTI_DNS
224	pIPAddr = &(FixedInfo->DnsServerList);
225	inet_aton(pIPAddr->IpAddress.String, &tmp_addr);
226	Log(("nat: DNS Servers:\n"));
227	if (fVerbose \|\| pdns_addr->s_addr != tmp_addr.s_addr)
228	LogRel(("NAT: DNS address: %s\n", pIPAddr->IpAddress.String));
229	*pdns_addr = tmp_addr;
230
231	pIPAddr = FixedInfo -> DnsServerList.Next;
232	while (pIPAddr)
233	{
234	if (fVerbose)
235	LogRel(("NAT: ignored DNS address: %s\n", pIPAddr ->IpAddress.String));
236	pIPAddr = pIPAddr ->Next;
237	}
238	#else
239	/localhost mask /
240	for (pIPAddr = &FixedInfo->DnsServerList; pIPAddr != NULL; pIPAddr = pIPAddr->Next)
241	{
242	struct dns_entry *da;
243	if(!inet_aton(pIPAddr->IpAddress.String, &tmp_addr))
244	continue;
245	da = RTMemAllocZ(sizeof (struct dns_entry));
246	if (da == NULL)
247	{
248	LogRel(("can't alloc memory for DNS entry\n"));
249	return -1;
250	}
251	/check /
252	if ((da->de_addr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET)) {
253	da->de_addr.s_addr = htonl(ntohl(special_addr.s_addr) \| CTL_ALIAS);
254	}
255	LIST_INSERT_HEAD(&pData->dns_list_head, da, de_list);
256	}
257	#endif
258	if (FixedInfo)
259	{
260	GlobalFree(FixedInfo);
261	FixedInfo = NULL;
262	}
263
264	get_dns_prefix:
265	if (ppszDomain)
266	{
267	OSVERSIONINFO ver;
268	char szDnsDomain[256];
269	DWORD dwSize = sizeof(szDnsDomain);
270
271	*ppszDomain = NULL;
272	GetVersionEx(&ver);
273	if (ver.dwMajorVersion >= 5)
274	{
275	/* GetComputerNameEx exists in Windows versions starting with 2000. */
276	if (GetComputerNameEx(ComputerNameDnsDomain, szDnsDomain, &dwSize))
277	{
278	if (szDnsDomain[0])
279	{
280	/* Just non-empty strings are valid. */
281	*ppszDomain = RTStrDup(szDnsDomain);
282	if (pData->fPassDomain)
283	{
284	if (fVerbose)
285	LogRel(("NAT: passing domain name %s\n", szDnsDomain));
286	}
287	else
288	Log(("nat: ignoring domain %s\n", szDnsDomain));
289	}
290	}
291	else
292	Log(("nat: GetComputerNameEx failed (%d)\n", GetLastError()));
293	}
294	}
295	return rc;
296	}
297
298	#else
299
300	static int get_dns_addr_domain(PNATState pData, bool fVerbose,
301	struct in_addr *pdns_addr,
302	const char **ppszDomain)
303	{
304	char buff[512];
305	char buff2[256];
306	FILE *f;
307	int found = 0;
308	struct in_addr tmp_addr;
309
310	#ifdef RT_OS_OS2
311	/* Try various locations. */
312	char *etc = getenv("ETC");
313	f = NULL;
314	if (etc)
315	{
316	snprintf(buff, sizeof(buff), "%s/RESOLV2", etc);
317	f = fopen(buff, "rt");
318	}
319	if (!f)
320	{
321	snprintf(buff, sizeof(buff), "%s/RESOLV2", _PATH_ETC);
322	f = fopen(buff, "rt");
323	}
324	if (!f)
325	{
326	snprintf(buff, sizeof(buff), "%s/resolv.conf", _PATH_ETC);
327	f = fopen(buff, "rt");
328	}
329	#else
330	f = fopen("/etc/resolv.conf", "r");
331	#endif
332	if (!f)
333	return -1;
334
335	if (ppszDomain)
336	*ppszDomain = NULL;
337	Log(("nat: DNS Servers:\n"));
338	while (fgets(buff, 512, f) != NULL)
339	{
340	#ifdef VBOX_WITH_MULTI_DNS
341	struct dns_entry *da = NULL;
342	#endif
343	if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1)
344	{
345	if (!inet_aton(buff2, &tmp_addr))
346	continue;
347	#ifndef VBOX_WITH_MULTI_DNS
348	/* If it's the first one, set it to dns_addr */
349	if (!found)
350	{
351	if (fVerbose \|\| pdns_addr->s_addr != tmp_addr.s_addr)
352	LogRel(("NAT: DNS address: %s\n", buff2));
353	*pdns_addr = tmp_addr;
354	}
355	else
356	{
357	if (fVerbose)
358	LogRel(("NAT: ignored DNS address: %s\n", buff2));
359	}
360	#else
361	/localhost mask /
362	da = RTMemAllocZ(sizeof (struct dns_entry));
363	if (da == NULL)
364	{
365	LogRel(("can't alloc memory for DNS entry\n"));
366	return -1;
367	}
368	/check /
369	da->de_addr.s_addr = tmp_addr.s_addr;
370	if ((da->de_addr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET)) {
371	da->de_addr.s_addr = htonl(ntohl(special_addr.s_addr) \| CTL_ALIAS);
372	}
373	LIST_INSERT_HEAD(&pData->dns_list_head, da, de_list);
374	#endif
375	found++;
376	}
377	if ( ppszDomain
378	&& (!strncmp(buff, "domain", 6) \|\| !strncmp(buff, "search", 6)))
379	{
380	/* Domain name/search list present. Pick first entry */
381	if (*ppszDomain == NULL)
382	{
383	char *tok;
384	char *saveptr;
385	tok = strtok_r(&buff[6], " \t\n", &saveptr);
386	if (tok)
387	{
388	*ppszDomain = RTStrDup(tok);
389	if (pData->fPassDomain)
390	{
391	if (fVerbose)
392	LogRel(("NAT: passing domain name %s\n", tok));
393	}
394	else
395	Log(("nat: ignoring domain %s\n", tok));
396	}
397	}
398	}
399	}
400	fclose(f);
401	if (!found)
402	return -1;
403	return 0;
404	}
405
406	#endif
407
408	int get_dns_addr(PNATState pData, struct in_addr *pdns_addr)
409	{
410	return get_dns_addr_domain(pData, false, pdns_addr, NULL);
411	}
412
413	int slirp_init(PNATState ppData, const char pszNetAddr, uint32_t u32Netmask,
414	bool fPassDomain, const char *pszTFTPPrefix,
415	const char pszBootFile, void pvUser)
416	{
417	int fNATfailed = 0;
418	int rc;
419	PNATState pData = RTMemAllocZ(sizeof(NATState));
420	*ppData = pData;
421	if (!pData)
422	return VERR_NO_MEMORY;
423	if (u32Netmask & 0x1f)
424	/* CTL is x.x.x.15, bootp passes up to 16 IPs (15..31) */
425	return VERR_INVALID_PARAMETER;
426	memset(pData, '\0', sizeof(NATState));
427	pData->fPassDomain = fPassDomain;
428	pData->pvUser = pvUser;
429	tftp_prefix = pszTFTPPrefix;
430	bootp_filename = pszBootFile;
431	pData->netmask = u32Netmask;
432
433	#ifdef RT_OS_WINDOWS
434	{
435	WSADATA Data;
436	WSAStartup(MAKEWORD(2,0), &Data);
437	}
438	# if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC)
439	pData->phEvents[VBOX_SOCKET_EVENT_INDEX] = CreateEvent(NULL, FALSE, FALSE, NULL);
440	# endif
441	#endif
442	#ifdef VBOX_WITH_SLIRP_MT
443	QSOCKET_LOCK_CREATE(tcb);
444	QSOCKET_LOCK_CREATE(udb);
445	rc = RTReqCreateQueue(&pData->pReqQueue);
446	AssertReleaseRC(rc);
447	#endif
448
449	link_up = 1;
450
451	debug_init();
452	if_init(pData);
453	ip_init(pData);
454	icmp_init(pData);
455
456	/* Initialise mbufs after setting the MTU */
457	m_init(pData);
458
459	inet_aton(pszNetAddr, &special_addr);
460	alias_addr.s_addr = special_addr.s_addr \| htonl(CTL_ALIAS);
461	/* @todo: add ability to configure this staff */
462	pData->tftp_server.s_addr = htonl(ntohl(special_addr.s_addr) \| CTL_TFTP);
463
464	/* set default addresses */
465	inet_aton("127.0.0.1", &loopback_addr);
466	#ifndef VBOX_WITH_MULTI_DNS
467	inet_aton("127.0.0.1", &dns_addr);
468
469	if (get_dns_addr_domain(pData, true, &dns_addr, &pData->pszDomain) < 0)
470	#else
471	LIST_INIT(&pData->dns_list_head);
472	if (get_dns_addr_domain(pData, true, NULL, &pData->pszDomain) < 0)
473	#endif
474	fNATfailed = 1;
475
476	getouraddr(pData);
477	return fNATfailed ? VINF_NAT_DNS : VINF_SUCCESS;
478	}
479
480	/**
481	* Statistics counters.
482	*/
483	void slirp_register_timers(PNATState pData, PPDMDRVINS pDrvIns)
484	{
485	#ifdef VBOX_WITH_STATISTICS
486	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatFill, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
487	STAMUNIT_TICKS_PER_CALL, "Profiling slirp fills", "/Drivers/NAT%d/Fill", pDrvIns->iInstance);
488	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatPoll, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
489	STAMUNIT_TICKS_PER_CALL, "Profiling slirp polls", "/Drivers/NAT%d/Poll", pDrvIns->iInstance);
490	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatFastTimer, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
491	STAMUNIT_TICKS_PER_CALL, "Profiling slirp fast timer", "/Drivers/NAT%d/TimerFast", pDrvIns->iInstance);
492	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatSlowTimer, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
493	STAMUNIT_TICKS_PER_CALL, "Profiling slirp slow timer", "/Drivers/NAT%d/TimerSlow", pDrvIns->iInstance);
494	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatTCP, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
495	STAMUNIT_COUNT, "TCP sockets", "/Drivers/NAT%d/SockTCP", pDrvIns->iInstance);
496	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatTCPHot, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
497	STAMUNIT_COUNT, "TCP sockets active", "/Drivers/NAT%d/SockTCPHot", pDrvIns->iInstance);
498	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatUDP, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
499	STAMUNIT_COUNT, "UDP sockets", "/Drivers/NAT%d/SockUDP", pDrvIns->iInstance);
500	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatUDPHot, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
501	STAMUNIT_COUNT, "UDP sockets active", "/Drivers/NAT%d/SockUDPHot", pDrvIns->iInstance);
502	#endif /* VBOX_WITH_STATISTICS */
503	}
504
505	/**
506	* Marks the link as up, making it possible to establish new connections.
507	*/
508	void slirp_link_up(PNATState pData)
509	{
510	link_up = 1;
511	}
512
513	/**
514	* Marks the link as down and cleans up the current connections.
515	*/
516	void slirp_link_down(PNATState pData)
517	{
518	struct socket *so;
519
520	while ((so = tcb.so_next) != &tcb)
521	{
522	if (so->so_state & SS_NOFDREF \|\| so->s == -1)
523	sofree(pData, so);
524	else
525	tcp_drop(pData, sototcpcb(so), 0);
526	}
527
528	while ((so = udb.so_next) != &udb)
529	udp_detach(pData, so);
530
531	link_up = 0;
532	}
533
534	/**
535	* Terminates the slirp component.
536	*/
537	void slirp_term(PNATState pData)
538	{
539	#ifdef VBOX_WITH_MULTI_DNS
540	struct dns_entry *de = NULL;
541	#endif
542	if (pData->pszDomain)
543	RTStrFree((char )(void )pData->pszDomain);
544
545	#ifdef RT_OS_WINDOWS
546	pData->pfIcmpCloseHandle(pData->icmp_socket.sh);
547	FreeLibrary(pData->hmIcmpLibrary);
548	RTMemFree(pData->pvIcmpBuffer);
549	# else
550	closesocket(pData->icmp_socket.s);
551	#endif
552
553	slirp_link_down(pData);
554	#ifdef VBOX_WITH_MULTI_DNS
555	while(!LIST_EMPTY(&pData->dns_list_head)) {
556	de = LIST_FIRST(&pData->dns_list_head);
557	LIST_REMOVE(de, de_list);
558	RTMemFree(de);
559	}
560	#endif
561	#ifdef RT_OS_WINDOWS
562	WSACleanup();
563	#endif
564	#ifdef LOG_ENABLED
565	Log(("\n"
566	"NAT statistics\n"
567	"--------------\n"
568	"\n"));
569	ipstats(pData);
570	tcpstats(pData);
571	udpstats(pData);
572	icmpstats(pData);
573	mbufstats(pData);
574	sockstats(pData);
575	Log(("\n"
576	"\n"
577	"\n"));
578	#endif
579	RTMemFree(pData);
580	}
581
582
583	#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE\|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
584	#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE\|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
585	#define UPD_NFDS(x) if (nfds < (x)) nfds = (x)
586
587	/*
588	* curtime kept to an accuracy of 1ms
589	*/
590	#ifdef RT_OS_WINDOWS
591	static void updtime(PNATState pData)
592	{
593	struct _timeb tb;
594
595	_ftime(&tb);
596	curtime = (u_int)tb.time * (u_int)1000;
597	curtime += (u_int)tb.millitm;
598	}
599	#else
600	static void updtime(PNATState pData)
601	{
602	gettimeofday(&tt, 0);
603
604	curtime = (u_int)tt.tv_sec * (u_int)1000;
605	curtime += (u_int)tt.tv_usec / (u_int)1000;
606
607	if ((tt.tv_usec % 1000) >= 500)
608	curtime++;
609	}
610	#endif
611
612	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
613	void slirp_select_fill(PNATState pData, int *pnfds,
614	fd_set readfds, fd_set writefds, fd_set *xfds)
615	#else /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
616	# ifdef RT_OS_WINDOWS
617	void slirp_select_fill(PNATState pData, int *pnfds)
618	# else /* RT_OS_WINDOWS */
619	void slirp_select_fill(PNATState pData, int pnfds, struct pollfd polls)
620	# endif /* !RT_OS_WINDOWS */
621	#endif /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
622	{
623	struct socket so, so_next;
624	int nfds;
625	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
626	int rc;
627	int error;
628	#endif
629	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && !defined(RT_OS_WINDOWS)
630	int poll_index = 0;
631	#endif
632	int i;
633
634	STAM_PROFILE_START(&pData->StatFill, a);
635
636	nfds = *pnfds;
637
638	/*
639	* First, TCP sockets
640	*/
641	do_slowtimo = 0;
642	if (link_up)
643	{
644	/*
645	* *_slowtimo needs calling if there are IP fragments
646	* in the fragment queue, or there are TCP connections active
647	*/
648	/* XXX:
649	* triggering of fragment expiration should be the same but use new macroses
650	*/
651	do_slowtimo = (tcb.so_next != &tcb);
652	if (!do_slowtimo)
653	{
654	for (i = 0; i < IPREASS_NHASH; i++)
655	{
656	if (!TAILQ_EMPTY(&ipq[i]))
657	{
658	do_slowtimo = 1;
659	break;
660	}
661	}
662	}
663	ICMP_ENGAGE_EVENT(&pData->icmp_socket, readfds);
664
665	STAM_COUNTER_RESET(&pData->StatTCP);
666	STAM_COUNTER_RESET(&pData->StatTCPHot);
667
668	QSOCKET_FOREACH(so, so_next, tcp)
669	/* { */
670	STAM_COUNTER_INC(&pData->StatTCP);
671
672	/*
673	* See if we need a tcp_fasttimo
674	*/
675	if ( time_fasttimo == 0
676	&& so->so_tcpcb != NULL
677	&& so->so_tcpcb->t_flags & TF_DELACK)
678	time_fasttimo = curtime; /* Flag when we want a fasttimo */
679
680	/*
681	* NOFDREF can include still connecting to local-host,
682	* newly socreated() sockets etc. Don't want to select these.
683	*/
684	if (so->so_state & SS_NOFDREF \|\| so->s == -1)
685	CONTINUE(tcp);
686
687	/*
688	* Set for reading sockets which are accepting
689	*/
690	if (so->so_state & SS_FACCEPTCONN)
691	{
692	STAM_COUNTER_INC(&pData->StatTCPHot);
693	TCP_ENGAGE_EVENT1(so, readfds);
694	CONTINUE(tcp);
695	}
696
697	/*
698	* Set for writing sockets which are connecting
699	*/
700	if (so->so_state & SS_ISFCONNECTING)
701	{
702	Log2(("connecting %R[natsock] engaged\n",so));
703	STAM_COUNTER_INC(&pData->StatTCPHot);
704	TCP_ENGAGE_EVENT1(so, writefds);
705	}
706
707	/*
708	* Set for writing if we are connected, can send more, and
709	* we have something to send
710	*/
711	if (CONN_CANFSEND(so) && so->so_rcv.sb_cc)
712	{
713	STAM_COUNTER_INC(&pData->StatTCPHot);
714	TCP_ENGAGE_EVENT1(so, writefds);
715	}
716
717	/*
718	* Set for reading (and urgent data) if we are connected, can
719	* receive more, and we have room for it XXX /2 ?
720	*/
721	if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2)))
722	{
723	STAM_COUNTER_INC(&pData->StatTCPHot);
724	TCP_ENGAGE_EVENT2(so, readfds, xfds);
725	}
726	LOOP_LABEL(tcp, so, so_next);
727	}
728
729	/*
730	* UDP sockets
731	*/
732	STAM_COUNTER_RESET(&pData->StatUDP);
733	STAM_COUNTER_RESET(&pData->StatUDPHot);
734
735	QSOCKET_FOREACH(so, so_next, udp)
736	/* { */
737
738	STAM_COUNTER_INC(&pData->StatUDP);
739
740	/*
741	* See if it's timed out
742	*/
743	if (so->so_expire)
744	{
745	if (so->so_expire <= curtime)
746	{
747	#ifdef VBOX_WITH_SLIRP_MT
748	/* we need so_next for continue our cycle*/
749	so_next = so->so_next;
750	#endif
751	UDP_DETACH(pData, so, so_next);
752	CONTINUE_NO_UNLOCK(udp);
753	}
754	else
755	do_slowtimo = 1; /* Let socket expire */
756	}
757
758	/*
759	* When UDP packets are received from over the link, they're
760	* sendto()'d straight away, so no need for setting for writing
761	* Limit the number of packets queued by this session to 4.
762	* Note that even though we try and limit this to 4 packets,
763	* the session could have more queued if the packets needed
764	* to be fragmented.
765	*
766	* (XXX <= 4 ?)
767	*/
768	if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4)
769	{
770	STAM_COUNTER_INC(&pData->StatUDPHot);
771	UDP_ENGAGE_EVENT(so, readfds);
772	}
773	LOOP_LABEL(udp, so, so_next);
774	}
775
776	}
777
778	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC)
779	# if defined(RT_OS_WINDOWS)
780	*pnfds = VBOX_EVENT_COUNT;
781	# else /* RT_OS_WINDOWS */
782	*pnfds = poll_index;
783	# endif /* !RT_OS_WINDOWS */
784	#else /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
785	*pnfds = nfds;
786	#endif /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
787
788	STAM_PROFILE_STOP(&pData->StatFill, a);
789	}
790
791	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC)
792	# if defined(RT_OS_WINDOWS)
793	void slirp_select_poll(PNATState pData, int fTimeout, int fIcmp)
794	# else /* RT_OS_WINDOWS */
795	void slirp_select_poll(PNATState pData, struct pollfd *polls, int ndfs)
796	# endif /* !RT_OS_WINDOWS */
797	#else /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
798	void slirp_select_poll(PNATState pData, fd_set readfds, fd_set writefds, fd_set *xfds)
799	#endif /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
800	{
801	struct socket so, so_next;
802	int ret;
803	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
804	WSANETWORKEVENTS NetworkEvents;
805	int rc;
806	int error;
807	#endif
808	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && !defined(RT_OS_WINDOWS)
809	int poll_index = 0;
810	#endif
811
812	STAM_PROFILE_START(&pData->StatPoll, a);
813
814	/* Update time */
815	updtime(pData);
816
817	/*
818	* See if anything has timed out
819	*/
820	if (link_up)
821	{
822	if (time_fasttimo && ((curtime - time_fasttimo) >= 2))
823	{
824	STAM_PROFILE_START(&pData->StatFastTimer, a);
825	tcp_fasttimo(pData);
826	time_fasttimo = 0;
827	STAM_PROFILE_STOP(&pData->StatFastTimer, a);
828	}
829	if (do_slowtimo && ((curtime - last_slowtimo) >= 499))
830	{
831	STAM_PROFILE_START(&pData->StatSlowTimer, a);
832	ip_slowtimo(pData);
833	tcp_slowtimo(pData);
834	last_slowtimo = curtime;
835	STAM_PROFILE_STOP(&pData->StatSlowTimer, a);
836	}
837	}
838	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
839	if (fTimeout)
840	return; /* only timer update */
841	#endif
842
843	/*
844	* Check sockets
845	*/
846	if (link_up)
847	{
848	#if defined(RT_OS_WINDOWS)
849	/*XXX: before renaming please make see define
850	* fIcmp in slirp_state.h
851	*/
852	if (fIcmp)
853	sorecvfrom(pData, &pData->icmp_socket);
854	#else
855	if ( (pData->icmp_socket.s != -1)
856	&& CHECK_FD_SET(&pData->icmp_socket, ignored, readfds))
857	sorecvfrom(pData, &pData->icmp_socket);
858	#endif
859	/*
860	* Check TCP sockets
861	*/
862	QSOCKET_FOREACH(so, so_next, tcp)
863	/* { */
864
865	#ifdef VBOX_WITH_SLIRP_MT
866	if ( so->so_state & SS_NOFDREF
867	&& so->so_deleted == 1)
868	{
869	struct socket son, sop = NULL;
870	QSOCKET_LOCK(tcb);
871	if (so->so_next != NULL)
872	{
873	if (so->so_next != &tcb)
874	SOCKET_LOCK(so->so_next);
875	son = so->so_next;
876	}
877	if ( so->so_prev != &tcb
878	&& so->so_prev != NULL)
879	{
880	SOCKET_LOCK(so->so_prev);
881	sop = so->so_prev;
882	}
883	QSOCKET_UNLOCK(tcb);
884	remque(pData, so);
885	NSOCK_DEC();
886	SOCKET_UNLOCK(so);
887	SOCKET_LOCK_DESTROY(so);
888	RTMemFree(so);
889	so_next = son;
890	if (sop != NULL)
891	SOCKET_UNLOCK(sop);
892	CONTINUE_NO_UNLOCK(tcp);
893	}
894	#endif
895	/*
896	* FD_ISSET is meaningless on these sockets
897	* (and they can crash the program)
898	*/
899	if (so->so_state & SS_NOFDREF \|\| so->s == -1)
900	CONTINUE(tcp);
901
902	POLL_TCP_EVENTS(rc, error, so, &NetworkEvents);
903
904	LOG_NAT_SOCK(so, TCP, &NetworkEvents, readfds, writefds, xfds);
905
906	/*
907	* Check for URG data
908	* This will soread as well, so no need to
909	* test for readfds below if this succeeds
910	*/
911
912	/* out-of-band data */
913	if (CHECK_FD_SET(so, NetworkEvents, xfds))
914	{
915	sorecvoob(pData, so);
916	}
917
918	/*
919	* Check sockets for reading
920	*/
921	else if ( CHECK_FD_SET(so, NetworkEvents, readfds)
922	\|\| WIN_CHECK_FD_SET(so, NetworkEvents, acceptds))
923	{
924	/*
925	* Check for incoming connections
926	*/
927	if (so->so_state & SS_FACCEPTCONN)
928	{
929	TCP_CONNECT(pData, so);
930	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
931	if (!(NetworkEvents.lNetworkEvents & FD_CLOSE))
932	#endif
933	CONTINUE(tcp);
934	}
935
936	ret = soread(pData, so);
937	/* Output it if we read something */
938	if (ret > 0)
939	TCP_OUTPUT(pData, sototcpcb(so));
940	}
941
942	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
943	/*
944	* Check for FD_CLOSE events.
945	*/
946	if (NetworkEvents.lNetworkEvents & FD_CLOSE)
947	{
948	/*
949	* drain the socket
950	*/
951	for (;;)
952	{
953	ret = soread(pData, so);
954	if (ret > 0)
955	TCP_OUTPUT(pData, sototcpcb(so));
956	else
957	break;
958	}
959	}
960	#endif
961
962	/*
963	* Check sockets for writing
964	*/
965	if (CHECK_FD_SET(so, NetworkEvents, writefds))
966	{
967	/*
968	* Check for non-blocking, still-connecting sockets
969	*/
970	if (so->so_state & SS_ISFCONNECTING)
971	{
972	Log2(("connecting %R[natsock] catched\n", so));
973	/* Connected */
974	so->so_state &= ~SS_ISFCONNECTING;
975
976	/*
977	* This should be probably guarded by PROBE_CONN too. Anyway,
978	* we disable it on OS/2 because the below send call returns
979	* EFAULT which causes the opened TCP socket to close right
980	* after it has been opened and connected.
981	*/
982	#ifndef RT_OS_OS2
983	ret = send(so->s, (const char *)&ret, 0, 0);
984	if (ret < 0)
985	{
986	/* XXXXX Must fix, zero bytes is a NOP */
987	if ( errno == EAGAIN
988	\|\| errno == EWOULDBLOCK
989	\|\| errno == EINPROGRESS
990	\|\| errno == ENOTCONN)
991	CONTINUE(tcp);
992
993	/* else failed */
994	so->so_state = SS_NOFDREF;
995	}
996	/* else so->so_state &= ~SS_ISFCONNECTING; */
997	#endif
998
999	/*
1000	* Continue tcp_input
1001	*/
1002	TCP_INPUT(pData, (struct mbuf *)NULL, sizeof(struct ip), so);
1003	/* continue; */
1004	}
1005	else
1006	SOWRITE(ret, pData, so);
1007	/*
1008	* XXX If we wrote something (a lot), there could be the need
1009	* for a window update. In the worst case, the remote will send
1010	* a window probe to get things going again.
1011	*/
1012	}
1013
1014	/*
1015	* Probe a still-connecting, non-blocking socket
1016	* to check if it's still alive
1017	*/
1018	#ifdef PROBE_CONN
1019	if (so->so_state & SS_ISFCONNECTING)
1020	{
1021	ret = recv(so->s, (char *)&ret, 0, 0);
1022
1023	if (ret < 0)
1024	{
1025	/* XXX */
1026	if ( errno == EAGAIN
1027	\|\| errno == EWOULDBLOCK
1028	\|\| errno == EINPROGRESS
1029	\|\| errno == ENOTCONN)
1030	{
1031	CONTINUE(tcp); /* Still connecting, continue */
1032	}
1033
1034	/* else failed */
1035	so->so_state = SS_NOFDREF;
1036
1037	/* tcp_input will take care of it */
1038	}
1039	else
1040	{
1041	ret = send(so->s, &ret, 0, 0);
1042	if (ret < 0)
1043	{
1044	/* XXX */
1045	if ( errno == EAGAIN
1046	\|\| errno == EWOULDBLOCK
1047	\|\| errno == EINPROGRESS
1048	\|\| errno == ENOTCONN)
1049	{
1050	CONTINUE(tcp);
1051	}
1052	/* else failed */
1053	so->so_state = SS_NOFDREF;
1054	}
1055	else
1056	so->so_state &= ~SS_ISFCONNECTING;
1057
1058	}
1059	TCP_INPUT((struct mbuf *)NULL, sizeof(struct ip),so);
1060	} /* SS_ISFCONNECTING */
1061	#endif
1062	LOOP_LABEL(tcp, so, so_next);
1063	}
1064
1065	/*
1066	* Now UDP sockets.
1067	* Incoming packets are sent straight away, they're not buffered.
1068	* Incoming UDP data isn't buffered either.
1069	*/
1070	QSOCKET_FOREACH(so, so_next, udp)
1071	/* { */
1072	#ifdef VBOX_WITH_SLIRP_MT
1073	if ( so->so_state & SS_NOFDREF
1074	&& so->so_deleted == 1)
1075	{
1076	struct socket son, sop = NULL;
1077	QSOCKET_LOCK(udb);
1078	if (so->so_next != NULL)
1079	{
1080	if (so->so_next != &udb)
1081	SOCKET_LOCK(so->so_next);
1082	son = so->so_next;
1083	}
1084	if ( so->so_prev != &udb
1085	&& so->so_prev != NULL)
1086	{
1087	SOCKET_LOCK(so->so_prev);
1088	sop = so->so_prev;
1089	}
1090	QSOCKET_UNLOCK(udb);
1091	remque(pData, so);
1092	NSOCK_DEC();
1093	SOCKET_UNLOCK(so);
1094	SOCKET_LOCK_DESTROY(so);
1095	RTMemFree(so);
1096	so_next = son;
1097	if (sop != NULL)
1098	SOCKET_UNLOCK(sop);
1099	CONTINUE_NO_UNLOCK(udp);
1100	}
1101	#endif
1102	POLL_UDP_EVENTS(rc, error, so, &NetworkEvents);
1103
1104	LOG_NAT_SOCK(so, UDP, &NetworkEvents, readfds, writefds, xfds);
1105
1106	if (so->s != -1 && CHECK_FD_SET(so, NetworkEvents, readfds))
1107	{
1108	SORECVFROM(pData, so);
1109	}
1110	LOOP_LABEL(udp, so, so_next);
1111	}
1112
1113	}
1114
1115	#ifndef VBOX_WITH_SLIRP_MT
1116	/*
1117	* See if we can start outputting
1118	*/
1119	if (if_queued && link_up)
1120	if_start(pData);
1121	#endif
1122
1123	STAM_PROFILE_STOP(&pData->StatPoll, a);
1124	}
1125
1126	#define ETH_ALEN 6
1127	#define ETH_HLEN 14
1128
1129	#define ARPOP_REQUEST 1 /* ARP request */
1130	#define ARPOP_REPLY 2 /* ARP reply */
1131
1132	struct ethhdr
1133	{
1134	unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
1135	unsigned char h_source[ETH_ALEN]; /* source ether addr */
1136	unsigned short h_proto; /* packet type ID field */
1137	};
1138
1139	struct arphdr
1140	{
1141	unsigned short ar_hrd; /* format of hardware address */
1142	unsigned short ar_pro; /* format of protocol address */
1143	unsigned char ar_hln; /* length of hardware address */
1144	unsigned char ar_pln; /* length of protocol address */
1145	unsigned short ar_op; /* ARP opcode (command) */
1146
1147	/*
1148	* Ethernet looks like this : This bit is variable sized however...
1149	*/
1150	unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
1151	unsigned char ar_sip[4]; /* sender IP address */
1152	unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
1153	unsigned char ar_tip[4]; /* target IP address */
1154	};
1155
1156	static
1157	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1158	void arp_input(PNATState pData, struct mbuf *m)
1159	#else
1160	void arp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1161	#endif
1162	{
1163	struct ethhdr *eh;
1164	struct ethhdr *reh;
1165	struct arphdr *ah;
1166	struct arphdr *rah;
1167	int ar_op;
1168	struct ex_list *ex_ptr;
1169	uint32_t htip;
1170	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1171	uint8_t arp_reply[sizeof(struct arphdr) + ETH_HLEN];
1172	eh = (struct ethhdr *)pkt;
1173	#else
1174	struct mbuf *mr;
1175	eh = mtod(m, struct ethhdr *);
1176	#endif
1177	ah = (struct arphdr *)&eh[1];
1178	htip = ntohl((uint32_t)ah->ar_tip);
1179
1180	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1181	mr = m_get(pData);
1182	mr->m_data += if_maxlinkhdr;
1183	mr->m_len = sizeof(struct arphdr);
1184	rah = mtod(mr, struct arphdr *);
1185	#else
1186	reh = (struct ethhdr *)arp_reply;
1187	rah = (struct arphdr *)&reh[1];
1188	#endif
1189
1190	ar_op = ntohs(ah->ar_op);
1191	switch(ar_op)
1192	{
1193	case ARPOP_REQUEST:
1194	if ((htip & pData->netmask) == ntohl(special_addr.s_addr))
1195	{
1196	if ( CTL_CHECK(htip,CTL_DNS)
1197	\|\| CTL_CHECK(htip, CTL_ALIAS)
1198	\|\| CTL_CHECK(htip, CTL_TFTP))
1199	goto arp_ok;
1200	for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
1201	{
1202	if ((htip & ~pData->netmask) == ex_ptr->ex_addr)
1203	goto arp_ok;
1204	}
1205	return;
1206	arp_ok:
1207
1208	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1209	memcpy(reh->h_dest, eh->h_source, ETH_ALEN);
1210	memcpy(reh->h_source, &special_addr, ETH_ALEN);
1211	reh->h_source[5] = ah->ar_tip[3];
1212	reh->h_proto = htons(ETH_P_ARP);
1213	#endif
1214	rah->ar_hrd = htons(1);
1215	rah->ar_pro = htons(ETH_P_IP);
1216	rah->ar_hln = ETH_ALEN;
1217	rah->ar_pln = 4;
1218	rah->ar_op = htons(ARPOP_REPLY);
1219	memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN);
1220
1221	switch (htip & ~pData->netmask)
1222	{
1223	case CTL_DNS:
1224	case CTL_ALIAS:
1225	rah->ar_sha[5] = (uint8_t)(htip & ~pData->netmask);
1226	break;
1227	default:;
1228	}
1229
1230	memcpy(rah->ar_sip, ah->ar_tip, 4);
1231	memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN);
1232	memcpy(rah->ar_tip, ah->ar_sip, 4);
1233	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1234	if_encap(pData, ETH_P_ARP, mr);
1235	m_free(pData, m);
1236	#else
1237	slirp_output(pData->pvUser, arp_reply, sizeof(arp_reply));
1238	#endif
1239	}
1240	break;
1241	default:
1242	break;
1243	}
1244	}
1245
1246	void slirp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1247	{
1248	struct mbuf *m;
1249	int proto;
1250	static bool fWarnedIpv6;
1251
1252	if (pkt_len < ETH_HLEN)
1253	{
1254	LogRel(("NAT: packet having size %d has been ingnored\n", pkt_len));
1255	return;
1256	}
1257
1258	m = m_get(pData);
1259	if (!m)
1260	{
1261	LogRel(("can't allocate new mbuf\n"));
1262	return;
1263	}
1264
1265	/* Note: we add to align the IP header */
1266
1267	if (M_FREEROOM(m) < pkt_len)
1268	m_inc(m, pkt_len);
1269
1270	m->m_len = pkt_len ;
1271	memcpy(m->m_data, pkt, pkt_len);
1272
1273	proto = ntohs((uint16_t )(pkt + 12));
1274	switch(proto)
1275	{
1276	case ETH_P_ARP:
1277	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1278	arp_input(pData, m);
1279	#else
1280	arp_input(pData, pkt, pkt_len);
1281	m_free(pData, m);
1282	#endif
1283	break;
1284	case ETH_P_IP:
1285	/* Update time. Important if the network is very quiet, as otherwise
1286	* the first outgoing connection gets an incorrect timestamp. */
1287	updtime(pData);
1288	m->m_data += ETH_HLEN;
1289	m->m_len -= ETH_HLEN;
1290	ip_input(pData, m);
1291	break;
1292	case ETH_P_IPV6:
1293	m_free(pData, m);
1294	if (!fWarnedIpv6)
1295	{
1296	LogRel(("NAT: IPv6 not supported\n"));
1297	fWarnedIpv6 = true;
1298	}
1299	break;
1300	default:
1301	LogRel(("NAT: Unsupported protocol %x\n", proto));
1302	m_free(pData, m);
1303	break;
1304	}
1305	RTMemFree((void *)pkt);
1306	}
1307
1308	/* output the IP packet to the ethernet device */
1309	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1310	void if_encap(PNATState pData, uint16_t eth_proto, struct mbuf *m)
1311	#else
1312	void if_encap(PNATState pData, uint8_t *ip_data, int ip_data_len)
1313	#endif
1314	{
1315	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1316	struct ethhdr *eh;
1317	uint8_t *buf = RTMemAlloc(1600);
1318	m->m_data -= if_maxlinkhdr;
1319	m->m_len += ETH_HLEN;
1320	eh = mtod(m, struct ethhdr *);
1321	#else
1322	uint8_t buf[1600];
1323	struct ethhdr eh = (struct ethhdr )buf;
1324
1325	if (ip_data_len + ETH_HLEN > sizeof(buf))
1326	return;
1327
1328	memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len);
1329	#endif
1330
1331
1332	memcpy(eh->h_dest, client_ethaddr, ETH_ALEN);
1333	memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1);
1334	/* XXX: not correct */
1335	eh->h_source[5] = CTL_ALIAS;
1336	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1337	eh->h_proto = htons(eth_proto);
1338	#if 0
1339	slirp_output(pData->pvUser, m, mtod(m, uint8_t *), m->m_len);
1340	#else
1341	memcpy(buf, mtod(m, uint8_t *), m->m_len);
1342	slirp_output(pData->pvUser, NULL, buf, m->m_len);
1343	m_free(pData, m);
1344	#endif
1345	#else
1346	eh->h_proto = htons(ETH_P_IP);
1347	slirp_output(pData->pvUser, buf, ip_data_len + ETH_HLEN);
1348	#endif
1349	}
1350
1351	int slirp_redir(PNATState pData, int is_udp, int host_port,
1352	struct in_addr guest_addr, int guest_port)
1353	{
1354	if (is_udp)
1355	{
1356	if (!udp_listen(pData, htons(host_port), guest_addr.s_addr,
1357	htons(guest_port), 0))
1358	return -1;
1359	}
1360	else
1361	{
1362	if (!solisten(pData, htons(host_port), guest_addr.s_addr,
1363	htons(guest_port), 0))
1364	return -1;
1365	}
1366	return 0;
1367	}
1368
1369	int slirp_add_exec(PNATState pData, int do_pty, const char *args, int addr_low_byte,
1370	int guest_port)
1371	{
1372	return add_exec(&exec_list, do_pty, (char *)args,
1373	addr_low_byte, htons(guest_port));
1374	}
1375
1376	void slirp_set_ethaddr(PNATState pData, const uint8_t *ethaddr)
1377	{
1378	memcpy(client_ethaddr, ethaddr, ETH_ALEN);
1379	}
1380
1381	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
1382	HANDLE *slirp_get_events(PNATState pData)
1383	{
1384	return pData->phEvents;
1385	}
1386	void slirp_register_external_event(PNATState pData, HANDLE hEvent, int index)
1387	{
1388	pData->phEvents[index] = hEvent;
1389	}
1390	#endif
1391
1392	unsigned int slirp_get_timeout_ms(PNATState pData)
1393	{
1394	if (link_up)
1395	{
1396	if (time_fasttimo)
1397	return 2;
1398	if (do_slowtimo)
1399	return 500; /* see PR_SLOWHZ */
1400	}
1401	return 0;
1402	}
1403
1404	#ifndef RT_OS_WINDOWS
1405	int slirp_get_nsock(PNATState pData)
1406	{
1407	return pData->nsock;
1408	}
1409	#endif
1410
1411	/*
1412	* this function called from NAT thread
1413	*/
1414	void slirp_post_sent(PNATState pData, void *pvArg)
1415	{
1416	struct socket *so = 0;
1417	struct tcpcb *tp = 0;
1418	struct mbuf m = (struct mbuf )pvArg;
1419	m_free(pData, m);
1420	}
1421	#ifdef VBOX_WITH_SLIRP_MT
1422	void slirp_process_queue(PNATState pData)
1423	{
1424	RTReqProcess(pData->pReqQueue, RT_INDEFINITE_WAIT);
1425	}
1426	void *slirp_get_queue(PNATState pData)
1427	{
1428	return pData->pReqQueue;
1429	}
1430	#endif

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/Devices/Network/slirp/slirp.c@ 16573

Download in other formats: