slirp.c@ 16444

Last change on this file since 16444 was 16443, checked in by vboxsync, 16 years ago

NAT:MT

slirp queue inroduced
main points of thread interactions are saved with critical sections
slirp polling routine and timers communicates with NAT guest IO thread via queue

TODO: not works well, not compilable on Unixes.

Property svn:eol-style set to native

File size: 39.5 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 && so->so_tcpcb->t_flags & TF_DELACK)
625	time_fasttimo = curtime; /* Flag when we want a fasttimo */
626
627	/*
628	* NOFDREF can include still connecting to local-host,
629	* newly socreated() sockets etc. Don't want to select these.
630	*/
631	if (so->so_state & SS_NOFDREF \|\| so->s == -1)
632	CONTINUE(tcp);
633
634	/*
635	* Set for reading sockets which are accepting
636	*/
637	if (so->so_state & SS_FACCEPTCONN)
638	{
639	STAM_COUNTER_INC(&pData->StatTCPHot);
640	TCP_ENGAGE_EVENT1(so, readfds);
641	CONTINUE(tcp);
642	}
643
644	/*
645	* Set for writing sockets which are connecting
646	*/
647	if (so->so_state & SS_ISFCONNECTING)
648	{
649	Log2(("connecting %R[natsock] engaged\n",so));
650	STAM_COUNTER_INC(&pData->StatTCPHot);
651	TCP_ENGAGE_EVENT1(so, writefds);
652	}
653
654	/*
655	* Set for writing if we are connected, can send more, and
656	* we have something to send
657	*/
658	if (CONN_CANFSEND(so) && so->so_rcv.sb_cc)
659	{
660	STAM_COUNTER_INC(&pData->StatTCPHot);
661	TCP_ENGAGE_EVENT1(so, writefds);
662	}
663
664	/*
665	* Set for reading (and urgent data) if we are connected, can
666	* receive more, and we have room for it XXX /2 ?
667	*/
668	if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2)))
669	{
670	STAM_COUNTER_INC(&pData->StatTCPHot);
671	TCP_ENGAGE_EVENT2(so, readfds, xfds);
672	}
673	LOOP_LABEL(tcp, so, so_next);
674	}
675
676	/*
677	* UDP sockets
678	*/
679	STAM_COUNTER_RESET(&pData->StatUDP);
680	STAM_COUNTER_RESET(&pData->StatUDPHot);
681
682	QSOCKET_FOREACH(so, so_next, udp)
683	/* { */
684
685	STAM_COUNTER_INC(&pData->StatUDP);
686
687	/*
688	* See if it's timed out
689	*/
690	if (so->so_expire)
691	{
692	if (so->so_expire <= curtime)
693	{
694	udp_detach(pData, so);
695	CONTINUE_NO_UNLOCK(udp);
696	}
697	else
698	do_slowtimo = 1; /* Let socket expire */
699	}
700
701	/*
702	* When UDP packets are received from over the link, they're
703	* sendto()'d straight away, so no need for setting for writing
704	* Limit the number of packets queued by this session to 4.
705	* Note that even though we try and limit this to 4 packets,
706	* the session could have more queued if the packets needed
707	* to be fragmented.
708	*
709	* (XXX <= 4 ?)
710	*/
711	if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4)
712	{
713	STAM_COUNTER_INC(&pData->StatUDPHot);
714	UDP_ENGAGE_EVENT(so, readfds);
715	}
716	LOOP_LABEL(udp, so, so_next);
717	}
718
719	}
720
721	#if !defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) \|\| !defined(RT_OS_WINDOWS)
722	*pnfds = nfds;
723	#else
724	*pnfds = VBOX_EVENT_COUNT;
725	#endif
726
727	STAM_PROFILE_STOP(&pData->StatFill, a);
728	}
729
730	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
731	void slirp_select_poll(PNATState pData, int fTimeout, int fIcmp)
732	#else
733	void slirp_select_poll(PNATState pData, fd_set readfds, fd_set writefds, fd_set *xfds)
734	#endif
735	{
736	struct socket so, so_next;
737	int ret;
738	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
739	WSANETWORKEVENTS NetworkEvents;
740	int rc;
741	int error;
742	#endif
743
744	STAM_PROFILE_START(&pData->StatPoll, a);
745
746	/* Update time */
747	updtime(pData);
748
749	/*
750	* See if anything has timed out
751	*/
752	if (link_up)
753	{
754	if (time_fasttimo && ((curtime - time_fasttimo) >= 2))
755	{
756	STAM_PROFILE_START(&pData->StatFastTimer, a);
757	tcp_fasttimo(pData);
758	time_fasttimo = 0;
759	STAM_PROFILE_STOP(&pData->StatFastTimer, a);
760	}
761	if (do_slowtimo && ((curtime - last_slowtimo) >= 499))
762	{
763	STAM_PROFILE_START(&pData->StatSlowTimer, a);
764	ip_slowtimo(pData);
765	tcp_slowtimo(pData);
766	last_slowtimo = curtime;
767	STAM_PROFILE_STOP(&pData->StatSlowTimer, a);
768	}
769	}
770	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
771	if (fTimeout)
772	return; /* only timer update */
773	#endif
774
775	/*
776	* Check sockets
777	*/
778	if (link_up)
779	{
780	#if defined(RT_OS_WINDOWS)
781	/*XXX: before renaming please make see define
782	* fIcmp in slirp_state.h
783	*/
784	if (fIcmp)
785	sorecvfrom(pData, &pData->icmp_socket);
786	#else
787	if (pData->icmp_socket.s != -1 && FD_ISSET(pData->icmp_socket.s, readfds))
788	sorecvfrom(pData, &pData->icmp_socket);
789	#endif
790	/*
791	* Check TCP sockets
792	*/
793	QSOCKET_FOREACH(so, so_next, tcp)
794	/* { */
795
796	/*
797	* FD_ISSET is meaningless on these sockets
798	* (and they can crash the program)
799	*/
800	if (so->so_state & SS_NOFDREF \|\| so->s == -1)
801	CONTINUE(tcp);
802
803	POLL_TCP_EVENTS(rc, error, so, &NetworkEvents);
804
805	LOG_NAT_SOCK(so, TCP, &NetworkEvents, readfds, writefds, xfds);
806
807	/*
808	* Check for URG data
809	* This will soread as well, so no need to
810	* test for readfds below if this succeeds
811	*/
812
813	/* out-of-band data */
814	if (CHECK_FD_SET(so, NetworkEvents, xfds))
815	{
816	sorecvoob(pData, so);
817	}
818
819	/*
820	* Check sockets for reading
821	*/
822	else if ( CHECK_FD_SET(so, NetworkEvents, readfds)
823	\|\| WIN_CHECK_FD_SET(so, NetworkEvents, acceptds))
824	{
825	/*
826	* Check for incoming connections
827	*/
828	if (so->so_state & SS_FACCEPTCONN)
829	{
830	TCP_CONNECT(pData, so);
831	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
832	if (!(NetworkEvents.lNetworkEvents & FD_CLOSE))
833	#endif
834	CONTINUE(tcp);
835	}
836
837	SOREAD(ret, pData, so, /fCloseIfNothingRead=/false);
838	/* Output it if we read something */
839	if (ret > 0)
840	TCP_OUTPUT(pData, sototcpcb(so));
841	}
842
843	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
844	/*
845	* Check for FD_CLOSE events.
846	*/
847	if (NetworkEvents.lNetworkEvents & FD_CLOSE)
848	{
849	/*
850	* drain the socket
851	*/
852	for (;;)
853	{
854	SOREAD(ret, pData, so, /fCloseIfNothingRead=/true);
855	if (ret > 0)
856	TCP_OUTPUT(pData, sototcpcb(so));
857	else
858	break;
859	}
860	}
861	#endif
862
863	/*
864	* Check sockets for writing
865	*/
866	if (CHECK_FD_SET(so, NetworkEvents, writefds))
867	{
868	/*
869	* Check for non-blocking, still-connecting sockets
870	*/
871	if (so->so_state & SS_ISFCONNECTING)
872	{
873	Log2(("connecting %R[natsock] catched\n", so));
874	/* Connected */
875	so->so_state &= ~SS_ISFCONNECTING;
876
877	/*
878	* This should be probably guarded by PROBE_CONN too. Anyway,
879	* we disable it on OS/2 because the below send call returns
880	* EFAULT which causes the opened TCP socket to close right
881	* after it has been opened and connected.
882	*/
883	#ifndef RT_OS_OS2
884	ret = send(so->s, (const char *)&ret, 0, 0);
885	if (ret < 0)
886	{
887	/* XXXXX Must fix, zero bytes is a NOP */
888	if ( errno == EAGAIN
889	\|\| errno == EWOULDBLOCK
890	\|\| errno == EINPROGRESS
891	\|\| errno == ENOTCONN)
892	CONTINUE(tcp);
893
894	/* else failed */
895	so->so_state = SS_NOFDREF;
896	}
897	/* else so->so_state &= ~SS_ISFCONNECTING; */
898	#endif
899
900	/*
901	* Continue tcp_input
902	*/
903	TCP_INPUT(pData, (struct mbuf *)NULL, sizeof(struct ip), so);
904	/* continue; */
905	}
906	else
907	SOWRITE(ret, pData, so);
908	/*
909	* XXX If we wrote something (a lot), there could be the need
910	* for a window update. In the worst case, the remote will send
911	* a window probe to get things going again.
912	*/
913	}
914
915	/*
916	* Probe a still-connecting, non-blocking socket
917	* to check if it's still alive
918	*/
919	#ifdef PROBE_CONN
920	if (so->so_state & SS_ISFCONNECTING)
921	{
922	ret = recv(so->s, (char *)&ret, 0, 0);
923
924	if (ret < 0)
925	{
926	/* XXX */
927	if ( errno == EAGAIN
928	\|\| errno == EWOULDBLOCK
929	\|\| errno == EINPROGRESS
930	\|\| errno == ENOTCONN)
931	{
932	CONTINUE(tcp); /* Still connecting, continue */
933	}
934
935	/* else failed */
936	so->so_state = SS_NOFDREF;
937
938	/* tcp_input will take care of it */
939	}
940	else
941	{
942	ret = send(so->s, &ret, 0, 0);
943	if (ret < 0)
944	{
945	/* XXX */
946	if ( errno == EAGAIN
947	\|\| errno == EWOULDBLOCK
948	\|\| errno == EINPROGRESS
949	\|\| errno == ENOTCONN)
950	{
951	CONTINUE(tcp);
952	}
953	/* else failed */
954	so->so_state = SS_NOFDREF;
955	}
956	else
957	so->so_state &= ~SS_ISFCONNECTING;
958
959	}
960	TCP_INPUT((struct mbuf *)NULL, sizeof(struct ip),so);
961	} /* SS_ISFCONNECTING */
962	#endif
963	LOOP_LABEL(tcp, so, so_next);
964	}
965
966	/*
967	* Now UDP sockets.
968	* Incoming packets are sent straight away, they're not buffered.
969	* Incoming UDP data isn't buffered either.
970	*/
971	QSOCKET_FOREACH(so, so_next, udp)
972	/* { */
973	POLL_UDP_EVENTS(rc, error, so, &NetworkEvents);
974
975	LOG_NAT_SOCK(so, UDP, &NetworkEvents, readfds, writefds, xfds);
976
977	if (so->s != -1 && CHECK_FD_SET(so, NetworkEvents, readfds))
978	{
979	SORECVFROM(pData, so);
980	}
981	LOOP_LABEL(udp, so, so_next);
982	}
983
984	}
985
986	#ifndef VBOX_WITH_SLIRP_MT
987	/*
988	* See if we can start outputting
989	*/
990	if (if_queued && link_up)
991	if_start(pData);
992	#endif
993
994	STAM_PROFILE_STOP(&pData->StatPoll, a);
995	}
996
997	#define ETH_ALEN 6
998	#define ETH_HLEN 14
999
1000	#define ARPOP_REQUEST 1 /* ARP request */
1001	#define ARPOP_REPLY 2 /* ARP reply */
1002
1003	struct ethhdr
1004	{
1005	unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
1006	unsigned char h_source[ETH_ALEN]; /* source ether addr */
1007	unsigned short h_proto; /* packet type ID field */
1008	};
1009
1010	struct arphdr
1011	{
1012	unsigned short ar_hrd; /* format of hardware address */
1013	unsigned short ar_pro; /* format of protocol address */
1014	unsigned char ar_hln; /* length of hardware address */
1015	unsigned char ar_pln; /* length of protocol address */
1016	unsigned short ar_op; /* ARP opcode (command) */
1017
1018	/*
1019	* Ethernet looks like this : This bit is variable sized however...
1020	*/
1021	unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
1022	unsigned char ar_sip[4]; /* sender IP address */
1023	unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
1024	unsigned char ar_tip[4]; /* target IP address */
1025	};
1026
1027	static
1028	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1029	void arp_input(PNATState pData, struct mbuf *m)
1030	#else
1031	void arp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1032	#endif
1033	{
1034	struct ethhdr *eh;
1035	struct ethhdr *reh;
1036	struct arphdr *ah;
1037	struct arphdr *rah;
1038	int ar_op;
1039	struct ex_list *ex_ptr;
1040	uint32_t htip;
1041	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1042	uint8_t arp_reply[sizeof(struct arphdr) + ETH_HLEN];
1043	eh = (struct ethhdr *)pkt;
1044	#else
1045	struct mbuf *mr;
1046	eh = mtod(m, struct ethhdr *);
1047	#endif
1048	ah = (struct arphdr *)&eh[1];
1049	htip = ntohl((uint32_t)ah->ar_tip);
1050
1051	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1052	mr = m_get(pData);
1053	mr->m_data += if_maxlinkhdr;
1054	mr->m_len = sizeof(struct arphdr);
1055	rah = mtod(mr, struct arphdr *);
1056	#else
1057	reh = (struct ethhdr *)arp_reply;
1058	rah = (struct arphdr *)&reh[1];
1059	#endif
1060
1061	ar_op = ntohs(ah->ar_op);
1062	switch(ar_op)
1063	{
1064	case ARPOP_REQUEST:
1065	if ((htip & pData->netmask) == ntohl(special_addr.s_addr))
1066	{
1067	if ( CTL_CHECK(htip,CTL_DNS)
1068	\|\| CTL_CHECK(htip, CTL_ALIAS)
1069	\|\| CTL_CHECK(htip, CTL_TFTP))
1070	goto arp_ok;
1071	for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
1072	{
1073	if ((htip & ~pData->netmask) == ex_ptr->ex_addr)
1074	goto arp_ok;
1075	}
1076	return;
1077	arp_ok:
1078
1079	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1080	memcpy(reh->h_dest, eh->h_source, ETH_ALEN);
1081	memcpy(reh->h_source, &special_addr, ETH_ALEN);
1082	reh->h_source[5] = ah->ar_tip[3];
1083	reh->h_proto = htons(ETH_P_ARP);
1084	#endif
1085	rah->ar_hrd = htons(1);
1086	rah->ar_pro = htons(ETH_P_IP);
1087	rah->ar_hln = ETH_ALEN;
1088	rah->ar_pln = 4;
1089	rah->ar_op = htons(ARPOP_REPLY);
1090	memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN);
1091
1092	switch (htip & ~pData->netmask)
1093	{
1094	case CTL_DNS:
1095	case CTL_ALIAS:
1096	rah->ar_sha[5] = (uint8_t)(htip & ~pData->netmask);
1097	break;
1098	default:;
1099	}
1100
1101	memcpy(rah->ar_sip, ah->ar_tip, 4);
1102	memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN);
1103	memcpy(rah->ar_tip, ah->ar_sip, 4);
1104	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1105	if_encap(pData, ETH_P_ARP, mr);
1106	m_free(pData, m);
1107	#else
1108	slirp_output(pData->pvUser, arp_reply, sizeof(arp_reply));
1109	#endif
1110	}
1111	break;
1112	default:
1113	break;
1114	}
1115	}
1116
1117	void slirp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1118	{
1119	struct mbuf *m;
1120	int proto;
1121	static bool fWarnedIpv6;
1122
1123	if (pkt_len < ETH_HLEN)
1124	{
1125	LogRel(("NAT: packet having size %d has been ingnored\n", pkt_len));
1126	return;
1127	}
1128
1129	m = m_get(pData);
1130	if (!m)
1131	{
1132	LogRel(("can't allocate new mbuf\n"));
1133	return;
1134	}
1135
1136	/* Note: we add to align the IP header */
1137
1138	if (M_FREEROOM(m) < pkt_len)
1139	m_inc(m, pkt_len);
1140
1141	m->m_len = pkt_len ;
1142	memcpy(m->m_data, pkt, pkt_len);
1143
1144	proto = ntohs((uint16_t )(pkt + 12));
1145	switch(proto)
1146	{
1147	case ETH_P_ARP:
1148	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1149	arp_input(pData, m);
1150	#else
1151	arp_input(pData, pkt, pkt_len);
1152	m_free(pData, m);
1153	#endif
1154	break;
1155	case ETH_P_IP:
1156	/* Update time. Important if the network is very quiet, as otherwise
1157	* the first outgoing connection gets an incorrect timestamp. */
1158	updtime(pData);
1159	m->m_data += ETH_HLEN;
1160	m->m_len -= ETH_HLEN;
1161	ip_input(pData, m);
1162	break;
1163	case ETH_P_IPV6:
1164	m_free(pData, m);
1165	if (!fWarnedIpv6)
1166	{
1167	LogRel(("NAT: IPv6 not supported\n"));
1168	fWarnedIpv6 = true;
1169	}
1170	break;
1171	default:
1172	LogRel(("NAT: Unsupported protocol %x\n", proto));
1173	m_free(pData, m);
1174	break;
1175	}
1176	}
1177
1178	/* output the IP packet to the ethernet device */
1179	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1180	void if_encap(PNATState pData, uint16_t eth_proto, struct mbuf *m)
1181	#else
1182	void if_encap(PNATState pData, uint8_t *ip_data, int ip_data_len)
1183	#endif
1184	{
1185	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1186	struct ethhdr *eh;
1187	uint8_t *buf = RTMemAlloc(1600);
1188	m->m_data -= if_maxlinkhdr;
1189	m->m_len += ETH_HLEN;
1190	eh = mtod(m, struct ethhdr *);
1191	#else
1192	uint8_t buf[1600];
1193	struct ethhdr eh = (struct ethhdr )buf;
1194
1195	if (ip_data_len + ETH_HLEN > sizeof(buf))
1196	return;
1197
1198	memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len);
1199	#endif
1200
1201
1202	memcpy(eh->h_dest, client_ethaddr, ETH_ALEN);
1203	memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1);
1204	/* XXX: not correct */
1205	eh->h_source[5] = CTL_ALIAS;
1206	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1207	eh->h_proto = htons(eth_proto);
1208	#if 0
1209	slirp_output(pData->pvUser, m, mtod(m, uint8_t *), m->m_len);
1210	#else
1211	memcpy(buf, mtod(m, uint8_t *), m->m_len);
1212	slirp_output(pData->pvUser, NULL, buf, m->m_len);
1213	m_free(pData, m);
1214	#endif
1215	#else
1216	eh->h_proto = htons(ETH_P_IP);
1217	slirp_output(pData->pvUser, buf, ip_data_len + ETH_HLEN);
1218	#endif
1219	}
1220
1221	int slirp_redir(PNATState pData, int is_udp, int host_port,
1222	struct in_addr guest_addr, int guest_port)
1223	{
1224	if (is_udp)
1225	{
1226	if (!udp_listen(pData, htons(host_port), guest_addr.s_addr,
1227	htons(guest_port), 0))
1228	return -1;
1229	}
1230	else
1231	{
1232	if (!solisten(pData, htons(host_port), guest_addr.s_addr,
1233	htons(guest_port), 0))
1234	return -1;
1235	}
1236	return 0;
1237	}
1238
1239	int slirp_add_exec(PNATState pData, int do_pty, const char *args, int addr_low_byte,
1240	int guest_port)
1241	{
1242	return add_exec(&exec_list, do_pty, (char *)args,
1243	addr_low_byte, htons(guest_port));
1244	}
1245
1246	void slirp_set_ethaddr(PNATState pData, const uint8_t *ethaddr)
1247	{
1248	memcpy(client_ethaddr, ethaddr, ETH_ALEN);
1249	}
1250
1251	#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
1252	HANDLE *slirp_get_events(PNATState pData)
1253	{
1254	return pData->phEvents;
1255	}
1256	void slirp_register_external_event(PNATState pData, HANDLE hEvent, int index)
1257	{
1258	pData->phEvents[index] = hEvent;
1259	}
1260	#endif
1261
1262	unsigned int slirp_get_timeout_ms(PNATState pData)
1263	{
1264	if (link_up)
1265	{
1266	if (time_fasttimo)
1267	return 2;
1268	if (do_slowtimo)
1269	return 500; /* see PR_SLOWHZ */
1270	}
1271	return 0;
1272	}
1273
1274	/*
1275	* this function called from NAT thread
1276	*/
1277	void slirp_post_sent(PNATState pData, void *pvArg)
1278	{
1279	struct socket *so = 0;
1280	struct tcpcb *tp = 0;
1281	struct mbuf m = (struct mbuf )pvArg;
1282	m_free(pData, m);
1283	}
1284	#ifdef VBOX_WITH_SLIRP_MT
1285	void slirp_process_queue(PNATState pData)
1286	{
1287	RTReqProcess(pData->pReqQueue, RT_INDEFINITE_WAIT);
1288	}
1289	void *slirp_get_queue(PNATState pData)
1290	{
1291	return pData->pReqQueue;
1292	}
1293	#endif

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source: vbox/trunk/src/VBox/Devices/Network/slirp/slirp.c@ 16444

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