slirp.c@ 16482

Last change on this file since 16482 was 16449, checked in by vboxsync, 16 years ago
NAT:MT connection closing is working now
Property svn:eol-style set to `native`
File size: 41.6 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
10	#if !defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) \|\| !defined(RT_OS_WINDOWS)
11
12	# define DO_ENGAGE_EVENT1(so, fdset, label) \
13	do { \
14	FD_SET((so)->s, (fdset)); \
15	UPD_NFDS((so)->s); \
16	} while(0)
17
18
19	# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
20	do { \
21	FD_SET((so)->s, (fdset1)); \
22	FD_SET((so)->s, (fdset2)); \
23	UPD_NFDS((so)->s); \
24	} while(0)
25
26	# define DO_POLL_EVENTS(rc, error, so, events, label) do {} while (0)
27
28	# define DO_CHECK_FD_SET(so, events, fdset) (FD_ISSET((so)->s, (fdset)))
29
30	# define DO_WIN_CHECK_FD_SET(so, events, fdset ) 0 /* specific for Windows Winsock API */
31
32	# ifndef RT_OS_WINDOWS
33	# define ICMP_ENGAGE_EVENT(so, fdset) \
34	do { \
35	if (pData->icmp_socket.s != -1) \
36	DO_ENGAGE_EVENT1((so), (fdset), ICMP); \
37	} while (0)
38	# else /* !RT_OS_WINDOWS */
39	# define ICMP_ENGAGE_EVENT(so, fdset) do {} while(0)
40	#endif /* RT_OS_WINDOWS */
41
42	#else /* defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS) */
43
44	/*
45	* On Windows, we will be notified by IcmpSendEcho2() when the response arrives.
46	* So no call to WSAEventSelect necessary.
47	*/
48	# define ICMP_ENGAGE_EVENT(so, fdset) do {} while(0)
49
50	# define DO_ENGAGE_EVENT1(so, fdset1, label) \
51	do { \
52	rc = WSAEventSelect((so)->s, VBOX_SOCKET_EVENT, FD_ALL_EVENTS); \
53	if (rc == SOCKET_ERROR) \
54	{ \
55	/* This should not happen */ \
56	error = WSAGetLastError(); \
57	LogRel(("WSAEventSelector (" #label ") error %d (so=%x, socket=%s, event=%x)\n", \
58	error, (so), (so)->s, VBOX_SOCKET_EVENT)); \
59	} \
60	} while(0); \
61	CONTINUE(label)
62
63	# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
64	DO_ENGAGE_EVENT1((so), (fdset1), label)
65
66	# define DO_POLL_EVENTS(rc, error, so, events, label) \
67	(rc) = WSAEnumNetworkEvents((so)->s, VBOX_SOCKET_EVENT, (events)); \
68	if ((rc) == SOCKET_ERROR) \
69	{ \
70	(error) = WSAGetLastError(); \
71	LogRel(("WSAEnumNetworkEvents " #label " error %d\n", (error))); \
72	CONTINUE(label); \
73	}
74
75	# define acceptds_win FD_ACCEPT
76	# define acceptds_win_bit FD_ACCEPT_BIT
77
78	# define readfds_win FD_READ
79	# define readfds_win_bit FD_READ_BIT
80
81	# define writefds_win FD_WRITE
82	# define writefds_win_bit FD_WRITE_BIT
83
84	# define xfds_win FD_OOB
85	# define xfds_win_bit FD_OOB_BIT
86
87	# define DO_CHECK_FD_SET(so, events, fdset) \
88	(((events).lNetworkEvents & fdset ## _win) && ((events).iErrorCode[fdset ## _win_bit] == 0))
89
90	# define DO_WIN_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset)
91
92	#endif /* defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS) */
93
94	#define TCP_ENGAGE_EVENT1(so, fdset) \
95	DO_ENGAGE_EVENT1((so), (fdset), tcp)
96
97	#define TCP_ENGAGE_EVENT2(so, fdset1, fdset2) \
98	DO_ENGAGE_EVENT2((so), (fdset1), (fdset2), tcp)
99
100	#define UDP_ENGAGE_EVENT(so, fdset) \
101	DO_ENGAGE_EVENT1((so), (fdset), udp)
102
103	#define POLL_TCP_EVENTS(rc, error, so, events) \
104	DO_POLL_EVENTS((rc), (error), (so), (events), tcp)
105
106	#define POLL_UDP_EVENTS(rc, error, so, events) \
107	DO_POLL_EVENTS((rc), (error), (so), (events), udp)
108
109	#define CHECK_FD_SET(so, events, set) \
110	(DO_CHECK_FD_SET((so), (events), set))
111
112	#define WIN_CHECK_FD_SET(so, events, set) \
113	(DO_WIN_CHECK_FD_SET((so), (events), set))
114
115	/*
116	* Loging macros
117	*/
118	#if VBOX_WITH_DEBUG_NAT_SOCKETS
119	# if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
120	# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
121	do { \
122	LogRel((" " #proto "%R[natsock] %R[natwinnetevents]\n", (so), (winevent))); \
123	} while (0)
124	# else
125	# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
126	do { \
127	LogRel((" " #proto " %R[natsock] %s %s %s\n", (so), FD_ISSET((so)->s, (r_fdset))?"READ":"",\
128	FD_ISSET((so)->s, (w_fdset))?"WRITE":"", FD_ISSET((so)->s, (x_fdset))?"OOB":"")); \
129	} while (0)
130	# endif /* VBOX_WITH_DEBUG_NAT_SOCKETS */
131	#else
132	# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) do {} while (0)
133	#endif /* !VBOX_WITH_DEBUG_NAT_SOCKETS */
134
135	#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))
136
137	static const uint8_t special_ethaddr[6] =
138	{
139	0x52, 0x54, 0x00, 0x12, 0x35, 0x00
140	};
141
142	#ifdef RT_OS_WINDOWS
143
144	static int get_dns_addr_domain(PNATState pData, bool fVerbose,
145	struct in_addr *pdns_addr,
146	const char **ppszDomain)
147	{
148	int rc = 0;
149	FIXED_INFO *FixedInfo = NULL;
150	ULONG BufLen;
151	DWORD ret;
152	IP_ADDR_STRING *pIPAddr;
153	struct in_addr tmp_addr;
154
155	FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO));
156	BufLen = sizeof(FIXED_INFO);
157
158	/** @todo: this API returns all DNS servers, no matter whether the
159	* corresponding network adapter is disabled or not. Maybe replace
160	* this by GetAdapterAddresses(), which is XP/Vista only though. */
161	if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen))
162	{
163	if (FixedInfo)
164	{
165	GlobalFree(FixedInfo);
166	FixedInfo = NULL;
167	}
168	FixedInfo = GlobalAlloc(GPTR, BufLen);
169	}
170
171	if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS)
172	{
173	Log(("GetNetworkParams failed. ret = %08x\n", (u_int)ret ));
174	if (FixedInfo)
175	{
176	GlobalFree(FixedInfo);
177	FixedInfo = NULL;
178	}
179	rc = -1;
180	goto get_dns_prefix;
181	}
182
183	#ifndef VBOX_WITH_MULTI_DNS
184	pIPAddr = &(FixedInfo->DnsServerList);
185	inet_aton(pIPAddr->IpAddress.String, &tmp_addr);
186	Log(("nat: DNS Servers:\n"));
187	if (fVerbose \|\| pdns_addr->s_addr != tmp_addr.s_addr)
188	LogRel(("NAT: DNS address: %s\n", pIPAddr->IpAddress.String));
189	*pdns_addr = tmp_addr;
190
191	pIPAddr = FixedInfo -> DnsServerList.Next;
192	while (pIPAddr)
193	{
194	if (fVerbose)
195	LogRel(("NAT: ignored DNS address: %s\n", pIPAddr ->IpAddress.String));
196	pIPAddr = pIPAddr ->Next;
197	}
198	#else
199	/localhost mask /
200	for (pIPAddr = &FixedInfo->DnsServerList; pIPAddr != NULL; pIPAddr = pIPAddr->Next)
201	{
202	struct dns_entry *da;
203	if(!inet_aton(pIPAddr->IpAddress.String, &tmp_addr))
204	continue;
205	da = RTMemAllocZ(sizeof (struct dns_entry));
206	if (da == NULL)
207	{
208	LogRel(("can't alloc memory for DNS entry\n"));
209	return -1;
210	}
211	/check /
212	if ((da->de_addr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET)) {
213	da->de_addr.s_addr = htonl(ntohl(special_addr.s_addr) \| CTL_ALIAS);
214	}
215	LIST_INSERT_HEAD(&pData->dns_list_head, da, de_list);
216	}
217	#endif
218	if (FixedInfo)
219	{
220	GlobalFree(FixedInfo);
221	FixedInfo = NULL;
222	}
223
224	get_dns_prefix:
225	if (ppszDomain)
226	{
227	OSVERSIONINFO ver;
228	char szDnsDomain[256];
229	DWORD dwSize = sizeof(szDnsDomain);
230
231	*ppszDomain = NULL;
232	GetVersionEx(&ver);
233	if (ver.dwMajorVersion >= 5)
234	{
235	/* GetComputerNameEx exists in Windows versions starting with 2000. */
236	if (GetComputerNameEx(ComputerNameDnsDomain, szDnsDomain, &dwSize))
237	{
238	if (szDnsDomain[0])
239	{
240	/* Just non-empty strings are valid. */
241	*ppszDomain = RTStrDup(szDnsDomain);
242	if (pData->fPassDomain)
243	{
244	if (fVerbose)
245	LogRel(("NAT: passing domain name %s\n", szDnsDomain));
246	}
247	else
248	Log(("nat: ignoring domain %s\n", szDnsDomain));
249	}
250	}
251	else
252	Log(("nat: GetComputerNameEx failed (%d)\n", GetLastError()));
253	}
254	}
255	return rc;
256	}
257
258	#else
259
260	static int get_dns_addr_domain(PNATState pData, bool fVerbose,
261	struct in_addr *pdns_addr,
262	const char **ppszDomain)
263	{
264	char buff[512];
265	char buff2[256];
266	FILE *f;
267	int found = 0;
268	struct in_addr tmp_addr;
269
270	#ifdef RT_OS_OS2
271	/* Try various locations. */
272	char *etc = getenv("ETC");
273	f = NULL;
274	if (etc)
275	{
276	snprintf(buff, sizeof(buff), "%s/RESOLV2", etc);
277	f = fopen(buff, "rt");
278	}
279	if (!f)
280	{
281	snprintf(buff, sizeof(buff), "%s/RESOLV2", _PATH_ETC);
282	f = fopen(buff, "rt");
283	}
284	if (!f)
285	{
286	snprintf(buff, sizeof(buff), "%s/resolv.conf", _PATH_ETC);
287	f = fopen(buff, "rt");
288	}
289	#else
290	f = fopen("/etc/resolv.conf", "r");
291	#endif
292	if (!f)
293	return -1;
294
295	if (ppszDomain)
296	*ppszDomain = NULL;
297	Log(("nat: DNS Servers:\n"));
298	while (fgets(buff, 512, f) != NULL)
299	{
300	#ifdef VBOX_WITH_MULTI_DNS
301	struct dns_entry *da = NULL;
302	#endif
303	if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1)
304	{
305	if (!inet_aton(buff2, &tmp_addr))
306	continue;
307	#ifndef VBOX_WITH_MULTI_DNS
308	/* If it's the first one, set it to dns_addr */
309	if (!found)
310	{
311	if (fVerbose \|\| pdns_addr->s_addr != tmp_addr.s_addr)
312	LogRel(("NAT: DNS address: %s\n", buff2));
313	*pdns_addr = tmp_addr;
314	}
315	else
316	{
317	if (fVerbose)
318	LogRel(("NAT: ignored DNS address: %s\n", buff2));
319	}
320	#else
321	/localhost mask /
322	da = RTMemAllocZ(sizeof (struct dns_entry));
323	if (da == NULL)
324	{
325	LogRel(("can't alloc memory for DNS entry\n"));
326	return -1;
327	}
328	/check /
329	da->de_addr.s_addr = tmp_addr.s_addr;
330	if ((da->de_addr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET)) {
331	da->de_addr.s_addr = htonl(ntohl(special_addr.s_addr) \| CTL_ALIAS);
332	}
333	LIST_INSERT_HEAD(&pData->dns_list_head, da, de_list);
334	#endif
335	found++;
336	}
337	if ( ppszDomain
338	&& (!strncmp(buff, "domain", 6) \|\| !strncmp(buff, "search", 6)))
339	{
340	/* Domain name/search list present. Pick first entry */
341	if (*ppszDomain == NULL)
342	{
343	char *tok;
344	char *saveptr;
345	tok = strtok_r(&buff[6], " \t\n", &saveptr);
346	if (tok)
347	{
348	*ppszDomain = RTStrDup(tok);
349	if (pData->fPassDomain)
350	{
351	if (fVerbose)
352	LogRel(("NAT: passing domain name %s\n", tok));
353	}
354	else
355	Log(("nat: ignoring domain %s\n", tok));
356	}
357	}
358	}
359	}
360	fclose(f);
361	if (!found)
362	return -1;
363	return 0;
364	}
365
366	#endif
367
368	int get_dns_addr(PNATState pData, struct in_addr *pdns_addr)
369	{
370	return get_dns_addr_domain(pData, false, pdns_addr, NULL);
371	}
372
373	int slirp_init(PNATState ppData, const char pszNetAddr, uint32_t u32Netmask,
374	bool fPassDomain, const char *pszTFTPPrefix,
375	const char pszBootFile, void pvUser)
376	{
377	int fNATfailed = 0;
378	int rc;
379	PNATState pData = RTMemAlloc(sizeof(NATState));
380	*ppData = pData;
381	if (!pData)
382	return VERR_NO_MEMORY;
383	if (u32Netmask & 0x1f)
384	/* CTL is x.x.x.15, bootp passes up to 16 IPs (15..31) */
385	return VERR_INVALID_PARAMETER;
386	memset(pData, '\0', sizeof(NATState));
387	pData->fPassDomain = fPassDomain;
388	pData->pvUser = pvUser;
389	tftp_prefix = pszTFTPPrefix;
390	bootp_filename = pszBootFile;
391	pData->netmask = u32Netmask;
392
393	#ifdef RT_OS_WINDOWS
394	{
395	WSADATA Data;
396	WSAStartup(MAKEWORD(2,0), &Data);
397	}
398	# if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC)
399	pData->phEvents[VBOX_SOCKET_EVENT_INDEX] = CreateEvent(NULL, FALSE, FALSE, NULL);
400	# endif
401	#endif
402	#ifdef VBOX_WITH_SLIRP_MT
403	QSOCKET_LOCK_CREATE(tcb);
404	QSOCKET_LOCK_CREATE(udb);
405	rc = RTReqCreateQueue(&pData->pReqQueue);
406	AssertReleaseRC(rc);
407	#endif
408
409	link_up = 1;
410
411	debug_init();
412	if_init(pData);
413	ip_init(pData);
414	icmp_init(pData);
415
416	/* Initialise mbufs after setting the MTU */
417	m_init(pData);
418
419	inet_aton(pszNetAddr, &special_addr);
420	alias_addr.s_addr = special_addr.s_addr \| htonl(CTL_ALIAS);
421	/* @todo: add ability to configure this staff */
422	pData->tftp_server.s_addr = htonl(ntohl(special_addr.s_addr) \| CTL_TFTP);
423
424	/* set default addresses */
425	inet_aton("127.0.0.1", &loopback_addr);
426	#ifndef VBOX_WITH_MULTI_DNS
427	inet_aton("127.0.0.1", &dns_addr);
428
429	if (get_dns_addr_domain(pData, true, &dns_addr, &pData->pszDomain) < 0)
430	#else
431	LIST_INIT(&pData->dns_list_head);
432	if (get_dns_addr_domain(pData, true, NULL, &pData->pszDomain) < 0)
433	#endif
434	fNATfailed = 1;
435
436	getouraddr(pData);
437	return fNATfailed ? VINF_NAT_DNS : VINF_SUCCESS;
438	}
439
440	/**
441	* Statistics counters.
442	*/
443	void slirp_register_timers(PNATState pData, PPDMDRVINS pDrvIns)
444	{
445	#ifdef VBOX_WITH_STATISTICS
446	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatFill, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
447	STAMUNIT_TICKS_PER_CALL, "Profiling slirp fills", "/Drivers/NAT%d/Fill", pDrvIns->iInstance);
448	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatPoll, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
449	STAMUNIT_TICKS_PER_CALL, "Profiling slirp polls", "/Drivers/NAT%d/Poll", pDrvIns->iInstance);
450	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatFastTimer, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
451	STAMUNIT_TICKS_PER_CALL, "Profiling slirp fast timer", "/Drivers/NAT%d/TimerFast", pDrvIns->iInstance);
452	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatSlowTimer, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
453	STAMUNIT_TICKS_PER_CALL, "Profiling slirp slow timer", "/Drivers/NAT%d/TimerSlow", pDrvIns->iInstance);
454	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatTCP, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
455	STAMUNIT_COUNT, "TCP sockets", "/Drivers/NAT%d/SockTCP", pDrvIns->iInstance);
456	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatTCPHot, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
457	STAMUNIT_COUNT, "TCP sockets active", "/Drivers/NAT%d/SockTCPHot", pDrvIns->iInstance);
458	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatUDP, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
459	STAMUNIT_COUNT, "UDP sockets", "/Drivers/NAT%d/SockUDP", pDrvIns->iInstance);
460	PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatUDPHot, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
461	STAMUNIT_COUNT, "UDP sockets active", "/Drivers/NAT%d/SockUDPHot", pDrvIns->iInstance);
462	#endif /* VBOX_WITH_STATISTICS */
463	}
464
465	/**
466	* Marks the link as up, making it possible to establish new connections.
467	*/
468	void slirp_link_up(PNATState pData)
469	{
470	link_up = 1;
471	}
472
473	/**
474	* Marks the link as down and cleans up the current connections.
475	*/
476	void slirp_link_down(PNATState pData)
477	{
478	struct socket *so;
479
480	while ((so = tcb.so_next) != &tcb)
481	{
482	if (so->so_state & SS_NOFDREF \|\| so->s == -1)
483	sofree(pData, so);
484	else
485	tcp_drop(pData, sototcpcb(so), 0);
486	}
487
488	while ((so = udb.so_next) != &udb)
489	udp_detach(pData, so);
490
491	link_up = 0;
492	}
493
494	/**
495	* Terminates the slirp component.
496	*/
497	void slirp_term(PNATState pData)
498	{
499	#ifdef VBOX_WITH_MULTI_DNS
500	struct dns_entry *de = NULL;
501	#endif
502	if (pData->pszDomain)
503	RTStrFree((char )(void )pData->pszDomain);
504
505	#ifdef RT_OS_WINDOWS
506	pData->pfIcmpCloseHandle(pData->icmp_socket.sh);
507	FreeLibrary(pData->hmIcmpLibrary);
508	RTMemFree(pData->pvIcmpBuffer);
509	# else
510	closesocket(pData->icmp_socket.s);
511	#endif
512
513	slirp_link_down(pData);
514	#ifdef VBOX_WITH_MULTI_DNS
515	while(!LIST_EMPTY(&pData->dns_list_head)) {
516	de = LIST_FIRST(&pData->dns_list_head);
517	LIST_REMOVE(de, de_list);
518	RTMemFree(de);
519	}
520	#endif
521	#ifdef RT_OS_WINDOWS
522	WSACleanup();
523	#endif
524	#ifdef LOG_ENABLED
525	Log(("\n"
526	"NAT statistics\n"
527	"--------------\n"
528	"\n"));
529	ipstats(pData);
530	tcpstats(pData);
531	udpstats(pData);
532	icmpstats(pData);
533	mbufstats(pData);
534	sockstats(pData);
535	Log(("\n"
536	"\n"
537	"\n"));
538	#endif
539	RTMemFree(pData);
540	}
541
542
543	#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE\|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
544	#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE\|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
545	#define UPD_NFDS(x) if (nfds < (x)) nfds = (x)
546
547	/*
548	* curtime kept to an accuracy of 1ms
549	*/
550	#ifdef RT_OS_WINDOWS
551	static void updtime(PNATState pData)
552	{
553	struct _timeb tb;
554
555	_ftime(&tb);
556	curtime = (u_int)tb.time * (u_int)1000;
557	curtime += (u_int)tb.millitm;
558	}
559	#else
560	static void updtime(PNATState pData)
561	{
562	gettimeofday(&tt, 0);
563
564	curtime = (u_int)tt.tv_sec * (u_int)1000;
565	curtime += (u_int)tt.tv_usec / (u_int)1000;
566
567	if ((tt.tv_usec % 1000) >= 500)
568	curtime++;
569	}
570	#endif
571
572	void slirp_select_fill(PNATState pData, int *pnfds,
573	fd_set readfds, fd_set writefds, fd_set *xfds)
574	{
575	struct socket so, so_next;
576	int nfds;
577	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
578	int rc;
579	int error;
580	#endif
581	int i;
582
583	STAM_PROFILE_START(&pData->StatFill, a);
584
585	nfds = *pnfds;
586
587	/*
588	* First, TCP sockets
589	*/
590	do_slowtimo = 0;
591	if (link_up)
592	{
593	/*
594	* *_slowtimo needs calling if there are IP fragments
595	* in the fragment queue, or there are TCP connections active
596	*/
597	/* XXX:
598	* triggering of fragment expiration should be the same but use new macroses
599	*/
600	do_slowtimo = (tcb.so_next != &tcb);
601	if (!do_slowtimo)
602	{
603	for (i = 0; i < IPREASS_NHASH; i++)
604	{
605	if (!TAILQ_EMPTY(&ipq[i]))
606	{
607	do_slowtimo = 1;
608	break;
609	}
610	}
611	}
612	ICMP_ENGAGE_EVENT(&pData->icmp_socket, readfds);
613
614	STAM_COUNTER_RESET(&pData->StatTCP);
615	STAM_COUNTER_RESET(&pData->StatTCPHot);
616
617	QSOCKET_FOREACH(so, so_next, tcp)
618	/* { */
619	STAM_COUNTER_INC(&pData->StatTCP);
620
621	/*
622	* See if we need a tcp_fasttimo
623	*/
624	if ( time_fasttimo == 0
625	&& so->so_tcpcb != NULL
626	&& so->so_tcpcb->t_flags & TF_DELACK)
627	time_fasttimo = curtime; /* Flag when we want a fasttimo */
628
629	/*
630	* NOFDREF can include still connecting to local-host,
631	* newly socreated() sockets etc. Don't want to select these.
632	*/
633	if (so->so_state & SS_NOFDREF \|\| so->s == -1)
634	CONTINUE(tcp);
635
636	/*
637	* Set for reading sockets which are accepting
638	*/
639	if (so->so_state & SS_FACCEPTCONN)
640	{
641	STAM_COUNTER_INC(&pData->StatTCPHot);
642	TCP_ENGAGE_EVENT1(so, readfds);
643	CONTINUE(tcp);
644	}
645
646	/*
647	* Set for writing sockets which are connecting
648	*/
649	if (so->so_state & SS_ISFCONNECTING)
650	{
651	Log2(("connecting %R[natsock] engaged\n",so));
652	STAM_COUNTER_INC(&pData->StatTCPHot);
653	TCP_ENGAGE_EVENT1(so, writefds);
654	}
655
656	/*
657	* Set for writing if we are connected, can send more, and
658	* we have something to send
659	*/
660	if (CONN_CANFSEND(so) && so->so_rcv.sb_cc)
661	{
662	STAM_COUNTER_INC(&pData->StatTCPHot);
663	TCP_ENGAGE_EVENT1(so, writefds);
664	}
665
666	/*
667	* Set for reading (and urgent data) if we are connected, can
668	* receive more, and we have room for it XXX /2 ?
669	*/
670	if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2)))
671	{
672	STAM_COUNTER_INC(&pData->StatTCPHot);
673	TCP_ENGAGE_EVENT2(so, readfds, xfds);
674	}
675	LOOP_LABEL(tcp, so, so_next);
676	}
677
678	/*
679	* UDP sockets
680	*/
681	STAM_COUNTER_RESET(&pData->StatUDP);
682	STAM_COUNTER_RESET(&pData->StatUDPHot);
683
684	QSOCKET_FOREACH(so, so_next, udp)
685	/* { */
686
687	STAM_COUNTER_INC(&pData->StatUDP);
688
689	/*
690	* See if it's timed out
691	*/
692	if (so->so_expire)
693	{
694	if (so->so_expire <= curtime)
695	{
696	#ifdef VBOX_WITH_SLIRP_MT
697	/* we need so_next for continue our cycle*/
698	so_next = so->so_next;
699	#endif
700	UDP_DETACH(pData, so, so_next);
701	CONTINUE_NO_UNLOCK(udp);
702	}
703	else
704	do_slowtimo = 1; /* Let socket expire */
705	}
706
707	/*
708	* When UDP packets are received from over the link, they're
709	* sendto()'d straight away, so no need for setting for writing
710	* Limit the number of packets queued by this session to 4.
711	* Note that even though we try and limit this to 4 packets,
712	* the session could have more queued if the packets needed
713	* to be fragmented.
714	*
715	* (XXX <= 4 ?)
716	*/
717	if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4)
718	{
719	STAM_COUNTER_INC(&pData->StatUDPHot);
720	UDP_ENGAGE_EVENT(so, readfds);
721	}
722	LOOP_LABEL(udp, so, so_next);
723	}
724
725	}
726
727	#if !defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) \|\| !defined(RT_OS_WINDOWS)
728	*pnfds = nfds;
729	#else
730	*pnfds = VBOX_EVENT_COUNT;
731	#endif
732
733	STAM_PROFILE_STOP(&pData->StatFill, a);
734	}
735
736	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
737	void slirp_select_poll(PNATState pData, int fTimeout, int fIcmp)
738	#else
739	void slirp_select_poll(PNATState pData, fd_set readfds, fd_set writefds, fd_set *xfds)
740	#endif
741	{
742	struct socket so, so_next;
743	int ret;
744	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
745	WSANETWORKEVENTS NetworkEvents;
746	int rc;
747	int error;
748	#endif
749
750	STAM_PROFILE_START(&pData->StatPoll, a);
751
752	/* Update time */
753	updtime(pData);
754
755	/*
756	* See if anything has timed out
757	*/
758	if (link_up)
759	{
760	if (time_fasttimo && ((curtime - time_fasttimo) >= 2))
761	{
762	STAM_PROFILE_START(&pData->StatFastTimer, a);
763	tcp_fasttimo(pData);
764	time_fasttimo = 0;
765	STAM_PROFILE_STOP(&pData->StatFastTimer, a);
766	}
767	if (do_slowtimo && ((curtime - last_slowtimo) >= 499))
768	{
769	STAM_PROFILE_START(&pData->StatSlowTimer, a);
770	ip_slowtimo(pData);
771	tcp_slowtimo(pData);
772	last_slowtimo = curtime;
773	STAM_PROFILE_STOP(&pData->StatSlowTimer, a);
774	}
775	}
776	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
777	if (fTimeout)
778	return; /* only timer update */
779	#endif
780
781	/*
782	* Check sockets
783	*/
784	if (link_up)
785	{
786	#if defined(RT_OS_WINDOWS)
787	/*XXX: before renaming please make see define
788	* fIcmp in slirp_state.h
789	*/
790	if (fIcmp)
791	sorecvfrom(pData, &pData->icmp_socket);
792	#else
793	if (pData->icmp_socket.s != -1 && FD_ISSET(pData->icmp_socket.s, readfds))
794	sorecvfrom(pData, &pData->icmp_socket);
795	#endif
796	/*
797	* Check TCP sockets
798	*/
799	QSOCKET_FOREACH(so, so_next, tcp)
800	/* { */
801
802	#ifdef VBOX_WITH_SLIRP_MT
803	if ( so->so_state & SS_NOFDREF
804	&& so->so_deleted == 1)
805	{
806	struct socket son, sop = NULL;
807	QSOCKET_LOCK(tcb);
808	if (so->so_next != NULL)
809	{
810	if (so->so_next != &tcb)
811	SOCKET_LOCK(so->so_next);
812	son = so->so_next;
813	}
814	if ( so->so_prev != &tcb
815	&& so->so_prev != NULL)
816	{
817	SOCKET_LOCK(so->so_prev);
818	sop = so->so_prev;
819	}
820	QSOCKET_UNLOCK(tcb);
821	remque(pData, so);
822	SOCKET_UNLOCK(so);
823	SOCKET_LOCK_DESTROY(so);
824	RTMemFree(so);
825	so_next = son;
826	if (sop != NULL)
827	SOCKET_UNLOCK(sop);
828	CONTINUE_NO_UNLOCK(tcp);
829	}
830	#endif
831	/*
832	* FD_ISSET is meaningless on these sockets
833	* (and they can crash the program)
834	*/
835	if (so->so_state & SS_NOFDREF \|\| so->s == -1)
836	CONTINUE(tcp);
837
838	POLL_TCP_EVENTS(rc, error, so, &NetworkEvents);
839
840	LOG_NAT_SOCK(so, TCP, &NetworkEvents, readfds, writefds, xfds);
841
842	/*
843	* Check for URG data
844	* This will soread as well, so no need to
845	* test for readfds below if this succeeds
846	*/
847
848	/* out-of-band data */
849	if (CHECK_FD_SET(so, NetworkEvents, xfds))
850	{
851	sorecvoob(pData, so);
852	}
853
854	/*
855	* Check sockets for reading
856	*/
857	else if ( CHECK_FD_SET(so, NetworkEvents, readfds)
858	\|\| WIN_CHECK_FD_SET(so, NetworkEvents, acceptds))
859	{
860	/*
861	* Check for incoming connections
862	*/
863	if (so->so_state & SS_FACCEPTCONN)
864	{
865	TCP_CONNECT(pData, so);
866	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
867	if (!(NetworkEvents.lNetworkEvents & FD_CLOSE))
868	#endif
869	CONTINUE(tcp);
870	}
871
872	SOREAD(ret, pData, so, /fCloseIfNothingRead=/false);
873	/* Output it if we read something */
874	if (ret > 0)
875	TCP_OUTPUT(pData, sototcpcb(so));
876	}
877
878	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
879	/*
880	* Check for FD_CLOSE events.
881	*/
882	if (NetworkEvents.lNetworkEvents & FD_CLOSE)
883	{
884	/*
885	* drain the socket
886	*/
887	for (;;)
888	{
889	SOREAD(ret, pData, so, /fCloseIfNothingRead=/true);
890	if (ret > 0)
891	TCP_OUTPUT(pData, sototcpcb(so));
892	else
893	break;
894	}
895	}
896	#endif
897
898	/*
899	* Check sockets for writing
900	*/
901	if (CHECK_FD_SET(so, NetworkEvents, writefds))
902	{
903	/*
904	* Check for non-blocking, still-connecting sockets
905	*/
906	if (so->so_state & SS_ISFCONNECTING)
907	{
908	Log2(("connecting %R[natsock] catched\n", so));
909	/* Connected */
910	so->so_state &= ~SS_ISFCONNECTING;
911
912	/*
913	* This should be probably guarded by PROBE_CONN too. Anyway,
914	* we disable it on OS/2 because the below send call returns
915	* EFAULT which causes the opened TCP socket to close right
916	* after it has been opened and connected.
917	*/
918	#ifndef RT_OS_OS2
919	ret = send(so->s, (const char *)&ret, 0, 0);
920	if (ret < 0)
921	{
922	/* XXXXX Must fix, zero bytes is a NOP */
923	if ( errno == EAGAIN
924	\|\| errno == EWOULDBLOCK
925	\|\| errno == EINPROGRESS
926	\|\| errno == ENOTCONN)
927	CONTINUE(tcp);
928
929	/* else failed */
930	so->so_state = SS_NOFDREF;
931	}
932	/* else so->so_state &= ~SS_ISFCONNECTING; */
933	#endif
934
935	/*
936	* Continue tcp_input
937	*/
938	TCP_INPUT(pData, (struct mbuf *)NULL, sizeof(struct ip), so);
939	/* continue; */
940	}
941	else
942	SOWRITE(ret, pData, so);
943	/*
944	* XXX If we wrote something (a lot), there could be the need
945	* for a window update. In the worst case, the remote will send
946	* a window probe to get things going again.
947	*/
948	}
949
950	/*
951	* Probe a still-connecting, non-blocking socket
952	* to check if it's still alive
953	*/
954	#ifdef PROBE_CONN
955	if (so->so_state & SS_ISFCONNECTING)
956	{
957	ret = recv(so->s, (char *)&ret, 0, 0);
958
959	if (ret < 0)
960	{
961	/* XXX */
962	if ( errno == EAGAIN
963	\|\| errno == EWOULDBLOCK
964	\|\| errno == EINPROGRESS
965	\|\| errno == ENOTCONN)
966	{
967	CONTINUE(tcp); /* Still connecting, continue */
968	}
969
970	/* else failed */
971	so->so_state = SS_NOFDREF;
972
973	/* tcp_input will take care of it */
974	}
975	else
976	{
977	ret = send(so->s, &ret, 0, 0);
978	if (ret < 0)
979	{
980	/* XXX */
981	if ( errno == EAGAIN
982	\|\| errno == EWOULDBLOCK
983	\|\| errno == EINPROGRESS
984	\|\| errno == ENOTCONN)
985	{
986	CONTINUE(tcp);
987	}
988	/* else failed */
989	so->so_state = SS_NOFDREF;
990	}
991	else
992	so->so_state &= ~SS_ISFCONNECTING;
993
994	}
995	TCP_INPUT((struct mbuf *)NULL, sizeof(struct ip),so);
996	} /* SS_ISFCONNECTING */
997	#endif
998	LOOP_LABEL(tcp, so, so_next);
999	}
1000
1001	/*
1002	* Now UDP sockets.
1003	* Incoming packets are sent straight away, they're not buffered.
1004	* Incoming UDP data isn't buffered either.
1005	*/
1006	QSOCKET_FOREACH(so, so_next, udp)
1007	/* { */
1008	#ifdef VBOX_WITH_SLIRP_MT
1009	if ( so->so_state & SS_NOFDREF
1010	&& so->so_deleted == 1)
1011	{
1012	struct socket son, sop = NULL;
1013	QSOCKET_LOCK(udb);
1014	if (so->so_next != NULL)
1015	{
1016	if (so->so_next != &udb)
1017	SOCKET_LOCK(so->so_next);
1018	son = so->so_next;
1019	}
1020	if ( so->so_prev != &udb
1021	&& so->so_prev != NULL)
1022	{
1023	SOCKET_LOCK(so->so_prev);
1024	sop = so->so_prev;
1025	}
1026	QSOCKET_UNLOCK(udb);
1027	remque(pData, so);
1028	SOCKET_UNLOCK(so);
1029	SOCKET_LOCK_DESTROY(so);
1030	RTMemFree(so);
1031	so_next = son;
1032	if (sop != NULL)
1033	SOCKET_UNLOCK(sop);
1034	CONTINUE_NO_UNLOCK(udp);
1035	}
1036	#endif
1037	POLL_UDP_EVENTS(rc, error, so, &NetworkEvents);
1038
1039	LOG_NAT_SOCK(so, UDP, &NetworkEvents, readfds, writefds, xfds);
1040
1041	if (so->s != -1 && CHECK_FD_SET(so, NetworkEvents, readfds))
1042	{
1043	SORECVFROM(pData, so);
1044	}
1045	LOOP_LABEL(udp, so, so_next);
1046	}
1047
1048	}
1049
1050	#ifndef VBOX_WITH_SLIRP_MT
1051	/*
1052	* See if we can start outputting
1053	*/
1054	if (if_queued && link_up)
1055	if_start(pData);
1056	#endif
1057
1058	STAM_PROFILE_STOP(&pData->StatPoll, a);
1059	}
1060
1061	#define ETH_ALEN 6
1062	#define ETH_HLEN 14
1063
1064	#define ARPOP_REQUEST 1 /* ARP request */
1065	#define ARPOP_REPLY 2 /* ARP reply */
1066
1067	struct ethhdr
1068	{
1069	unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
1070	unsigned char h_source[ETH_ALEN]; /* source ether addr */
1071	unsigned short h_proto; /* packet type ID field */
1072	};
1073
1074	struct arphdr
1075	{
1076	unsigned short ar_hrd; /* format of hardware address */
1077	unsigned short ar_pro; /* format of protocol address */
1078	unsigned char ar_hln; /* length of hardware address */
1079	unsigned char ar_pln; /* length of protocol address */
1080	unsigned short ar_op; /* ARP opcode (command) */
1081
1082	/*
1083	* Ethernet looks like this : This bit is variable sized however...
1084	*/
1085	unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
1086	unsigned char ar_sip[4]; /* sender IP address */
1087	unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
1088	unsigned char ar_tip[4]; /* target IP address */
1089	};
1090
1091	static
1092	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1093	void arp_input(PNATState pData, struct mbuf *m)
1094	#else
1095	void arp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1096	#endif
1097	{
1098	struct ethhdr *eh;
1099	struct ethhdr *reh;
1100	struct arphdr *ah;
1101	struct arphdr *rah;
1102	int ar_op;
1103	struct ex_list *ex_ptr;
1104	uint32_t htip;
1105	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1106	uint8_t arp_reply[sizeof(struct arphdr) + ETH_HLEN];
1107	eh = (struct ethhdr *)pkt;
1108	#else
1109	struct mbuf *mr;
1110	eh = mtod(m, struct ethhdr *);
1111	#endif
1112	ah = (struct arphdr *)&eh[1];
1113	htip = ntohl((uint32_t)ah->ar_tip);
1114
1115	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1116	mr = m_get(pData);
1117	mr->m_data += if_maxlinkhdr;
1118	mr->m_len = sizeof(struct arphdr);
1119	rah = mtod(mr, struct arphdr *);
1120	#else
1121	reh = (struct ethhdr *)arp_reply;
1122	rah = (struct arphdr *)&reh[1];
1123	#endif
1124
1125	ar_op = ntohs(ah->ar_op);
1126	switch(ar_op)
1127	{
1128	case ARPOP_REQUEST:
1129	if ((htip & pData->netmask) == ntohl(special_addr.s_addr))
1130	{
1131	if ( CTL_CHECK(htip,CTL_DNS)
1132	\|\| CTL_CHECK(htip, CTL_ALIAS)
1133	\|\| CTL_CHECK(htip, CTL_TFTP))
1134	goto arp_ok;
1135	for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
1136	{
1137	if ((htip & ~pData->netmask) == ex_ptr->ex_addr)
1138	goto arp_ok;
1139	}
1140	return;
1141	arp_ok:
1142
1143	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1144	memcpy(reh->h_dest, eh->h_source, ETH_ALEN);
1145	memcpy(reh->h_source, &special_addr, ETH_ALEN);
1146	reh->h_source[5] = ah->ar_tip[3];
1147	reh->h_proto = htons(ETH_P_ARP);
1148	#endif
1149	rah->ar_hrd = htons(1);
1150	rah->ar_pro = htons(ETH_P_IP);
1151	rah->ar_hln = ETH_ALEN;
1152	rah->ar_pln = 4;
1153	rah->ar_op = htons(ARPOP_REPLY);
1154	memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN);
1155
1156	switch (htip & ~pData->netmask)
1157	{
1158	case CTL_DNS:
1159	case CTL_ALIAS:
1160	rah->ar_sha[5] = (uint8_t)(htip & ~pData->netmask);
1161	break;
1162	default:;
1163	}
1164
1165	memcpy(rah->ar_sip, ah->ar_tip, 4);
1166	memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN);
1167	memcpy(rah->ar_tip, ah->ar_sip, 4);
1168	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1169	if_encap(pData, ETH_P_ARP, mr);
1170	m_free(pData, m);
1171	#else
1172	slirp_output(pData->pvUser, arp_reply, sizeof(arp_reply));
1173	#endif
1174	}
1175	break;
1176	default:
1177	break;
1178	}
1179	}
1180
1181	void slirp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1182	{
1183	struct mbuf *m;
1184	int proto;
1185	static bool fWarnedIpv6;
1186
1187	if (pkt_len < ETH_HLEN)
1188	{
1189	LogRel(("NAT: packet having size %d has been ingnored\n", pkt_len));
1190	return;
1191	}
1192
1193	m = m_get(pData);
1194	if (!m)
1195	{
1196	LogRel(("can't allocate new mbuf\n"));
1197	return;
1198	}
1199
1200	/* Note: we add to align the IP header */
1201
1202	if (M_FREEROOM(m) < pkt_len)
1203	m_inc(m, pkt_len);
1204
1205	m->m_len = pkt_len ;
1206	memcpy(m->m_data, pkt, pkt_len);
1207
1208	proto = ntohs((uint16_t )(pkt + 12));
1209	switch(proto)
1210	{
1211	case ETH_P_ARP:
1212	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1213	arp_input(pData, m);
1214	#else
1215	arp_input(pData, pkt, pkt_len);
1216	m_free(pData, m);
1217	#endif
1218	break;
1219	case ETH_P_IP:
1220	/* Update time. Important if the network is very quiet, as otherwise
1221	* the first outgoing connection gets an incorrect timestamp. */
1222	updtime(pData);
1223	m->m_data += ETH_HLEN;
1224	m->m_len -= ETH_HLEN;
1225	ip_input(pData, m);
1226	break;
1227	case ETH_P_IPV6:
1228	m_free(pData, m);
1229	if (!fWarnedIpv6)
1230	{
1231	LogRel(("NAT: IPv6 not supported\n"));
1232	fWarnedIpv6 = true;
1233	}
1234	break;
1235	default:
1236	LogRel(("NAT: Unsupported protocol %x\n", proto));
1237	m_free(pData, m);
1238	break;
1239	}
1240	}
1241
1242	/* output the IP packet to the ethernet device */
1243	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1244	void if_encap(PNATState pData, uint16_t eth_proto, struct mbuf *m)
1245	#else
1246	void if_encap(PNATState pData, uint8_t *ip_data, int ip_data_len)
1247	#endif
1248	{
1249	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1250	struct ethhdr *eh;
1251	uint8_t *buf = RTMemAlloc(1600);
1252	m->m_data -= if_maxlinkhdr;
1253	m->m_len += ETH_HLEN;
1254	eh = mtod(m, struct ethhdr *);
1255	#else
1256	uint8_t buf[1600];
1257	struct ethhdr eh = (struct ethhdr )buf;
1258
1259	if (ip_data_len + ETH_HLEN > sizeof(buf))
1260	return;
1261
1262	memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len);
1263	#endif
1264
1265
1266	memcpy(eh->h_dest, client_ethaddr, ETH_ALEN);
1267	memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1);
1268	/* XXX: not correct */
1269	eh->h_source[5] = CTL_ALIAS;
1270	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1271	eh->h_proto = htons(eth_proto);
1272	#if 0
1273	slirp_output(pData->pvUser, m, mtod(m, uint8_t *), m->m_len);
1274	#else
1275	memcpy(buf, mtod(m, uint8_t *), m->m_len);
1276	slirp_output(pData->pvUser, NULL, buf, m->m_len);
1277	m_free(pData, m);
1278	#endif
1279	#else
1280	eh->h_proto = htons(ETH_P_IP);
1281	slirp_output(pData->pvUser, buf, ip_data_len + ETH_HLEN);
1282	#endif
1283	}
1284
1285	int slirp_redir(PNATState pData, int is_udp, int host_port,
1286	struct in_addr guest_addr, int guest_port)
1287	{
1288	if (is_udp)
1289	{
1290	if (!udp_listen(pData, htons(host_port), guest_addr.s_addr,
1291	htons(guest_port), 0))
1292	return -1;
1293	}
1294	else
1295	{
1296	if (!solisten(pData, htons(host_port), guest_addr.s_addr,
1297	htons(guest_port), 0))
1298	return -1;
1299	}
1300	return 0;
1301	}
1302
1303	int slirp_add_exec(PNATState pData, int do_pty, const char *args, int addr_low_byte,
1304	int guest_port)
1305	{
1306	return add_exec(&exec_list, do_pty, (char *)args,
1307	addr_low_byte, htons(guest_port));
1308	}
1309
1310	void slirp_set_ethaddr(PNATState pData, const uint8_t *ethaddr)
1311	{
1312	memcpy(client_ethaddr, ethaddr, ETH_ALEN);
1313	}
1314
1315	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
1316	HANDLE *slirp_get_events(PNATState pData)
1317	{
1318	return pData->phEvents;
1319	}
1320	void slirp_register_external_event(PNATState pData, HANDLE hEvent, int index)
1321	{
1322	pData->phEvents[index] = hEvent;
1323	}
1324	#endif
1325
1326	unsigned int slirp_get_timeout_ms(PNATState pData)
1327	{
1328	if (link_up)
1329	{
1330	if (time_fasttimo)
1331	return 2;
1332	if (do_slowtimo)
1333	return 500; /* see PR_SLOWHZ */
1334	}
1335	return 0;
1336	}
1337
1338	/*
1339	* this function called from NAT thread
1340	*/
1341	void slirp_post_sent(PNATState pData, void *pvArg)
1342	{
1343	struct socket *so = 0;
1344	struct tcpcb *tp = 0;
1345	struct mbuf m = (struct mbuf )pvArg;
1346	m_free(pData, m);
1347	}
1348	#ifdef VBOX_WITH_SLIRP_MT
1349	void slirp_process_queue(PNATState pData)
1350	{
1351	RTReqProcess(pData->pReqQueue, RT_INDEFINITE_WAIT);
1352	}
1353	void *slirp_get_queue(PNATState pData)
1354	{
1355	return pData->pReqQueue;
1356	}
1357	#endif

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source: vbox/trunk/src/VBox/Devices/Network/slirp/slirp.c@ 16482

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