VirtualBox

source: vbox/trunk/src/VBox/Devices/Network/slirp/slirp.c@ 25266

Last change on this file since 25266 was 25266, checked in by vboxsync, 15 years ago

NAT: build fixes
  • Property svn:eol-style set to native
File size: 66.6 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#include <iprt/file.h>
10#ifndef RT_OS_WINDOWS
11# include <sys/ioctl.h>
12# include <poll.h>
13#else
14# include <Winnls.h>
15# define _WINSOCK2API_
16# include <IPHlpApi.h>
17#endif
18#include <alias.h>
19
20#if !defined(RT_OS_WINDOWS)
21
22# define DO_ENGAGE_EVENT1(so, fdset, label) \
23 do { \
24 if ( so->so_poll_index != -1 \
25 && so->s == polls[so->so_poll_index].fd) { \
26 polls[so->so_poll_index].events |= N_(fdset ## _poll); \
27 break; /* out of this loop */ \
28 } \
29 AssertRelease(poll_index < (nfds)); \
30 AssertRelease(poll_index >= 0 && poll_index < (nfds)); \
31 polls[poll_index].fd = (so)->s; \
32 (so)->so_poll_index = poll_index; \
33 polls[poll_index].events = N_(fdset ## _poll); \
34 polls[poll_index].revents = 0; \
35 poll_index++; \
36 } while (0)
37
38
39# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
40 do { \
41 if ( so->so_poll_index != -1 \
42 && so->s == polls[so->so_poll_index].fd) { \
43 polls[so->so_poll_index].events |= \
44 N_(fdset1 ## _poll) | N_(fdset1 ## _poll); \
45 break; /* out of this loop */ \
46 } \
47 AssertRelease(poll_index < (nfds)); \
48 polls[poll_index].fd = (so)->s; \
49 (so)->so_poll_index = poll_index; \
50 polls[poll_index].events = \
51 N_(fdset1 ## _poll) | N_(fdset1 ## _poll); \
52 poll_index++; \
53 } while (0)
54
55# define DO_POLL_EVENTS(rc, error, so, events, label) do {} while (0)
56
57# define DO_CHECK_FD_SET(so, events, fdset) \
58 ( ((so)->so_poll_index != -1) \
59 && ((so)->so_poll_index <= ndfs) \
60 && ((so)->s == polls[so->so_poll_index].fd) \
61 && (polls[(so)->so_poll_index].revents & N_(fdset ## _poll)))
62
63 /* specific for Unix API */
64# define DO_UNIX_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset)
65 /* specific for Windows Winsock API */
66# define DO_WIN_CHECK_FD_SET(so, events, fdset ) 0
67
68# ifndef RT_OS_WINDOWS
69
70# ifndef RT_OS_LINUX
71# define readfds_poll (POLLRDNORM)
72# define writefds_poll (POLLWRNORM)
73# define xfds_poll (POLLRDBAND|POLLWRBAND|POLLPRI)
74# else
75# define readfds_poll (POLLIN)
76# define writefds_poll (POLLOUT)
77# define xfds_poll (POLLPRI)
78# endif
79# define rderr_poll (POLLERR)
80# define rdhup_poll (POLLHUP)
81# define nval_poll (POLLNVAL)
82
83# define ICMP_ENGAGE_EVENT(so, fdset) \
84 do { \
85 if (pData->icmp_socket.s != -1) \
86 DO_ENGAGE_EVENT1((so), fdset, ICMP); \
87 } while (0)
88# else /* !RT_OS_WINDOWS */
89# define DO_WIN_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset)
90# define ICMP_ENGAGE_EVENT(so, fdset) do {} while (0)
91#endif /* RT_OS_WINDOWS */
92
93#else /* defined(RT_OS_WINDOWS) */
94
95/*
96 * On Windows, we will be notified by IcmpSendEcho2() when the response arrives.
97 * So no call to WSAEventSelect necessary.
98 */
99# define ICMP_ENGAGE_EVENT(so, fdset) do {} while (0)
100
101# define DO_ENGAGE_EVENT1(so, fdset1, label) \
102 do { \
103 rc = WSAEventSelect((so)->s, VBOX_SOCKET_EVENT, FD_ALL_EVENTS); \
104 if (rc == SOCKET_ERROR) \
105 { \
106 /* This should not happen */ \
107 error = WSAGetLastError(); \
108 LogRel(("WSAEventSelect (" #label ") error %d (so=%x, socket=%s, event=%x)\n", \
109 error, (so), (so)->s, VBOX_SOCKET_EVENT)); \
110 } \
111 } while (0); \
112 CONTINUE(label)
113
114# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
115 DO_ENGAGE_EVENT1((so), (fdset1), label)
116
117# define DO_POLL_EVENTS(rc, error, so, events, label) \
118 (rc) = WSAEnumNetworkEvents((so)->s, VBOX_SOCKET_EVENT, (events)); \
119 if ((rc) == SOCKET_ERROR) \
120 { \
121 (error) = WSAGetLastError(); \
122 LogRel(("WSAEnumNetworkEvents " #label " error %d\n", (error))); \
123 CONTINUE(label); \
124 }
125
126# define acceptds_win FD_ACCEPT
127# define acceptds_win_bit FD_ACCEPT_BIT
128
129# define readfds_win FD_READ
130# define readfds_win_bit FD_READ_BIT
131
132# define writefds_win FD_WRITE
133# define writefds_win_bit FD_WRITE_BIT
134
135# define xfds_win FD_OOB
136# define xfds_win_bit FD_OOB_BIT
137
138# define DO_CHECK_FD_SET(so, events, fdset) \
139 (((events).lNetworkEvents & fdset ## _win) && ((events).iErrorCode[fdset ## _win_bit] == 0))
140
141# define DO_WIN_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset)
142# define DO_UNIX_CHECK_FD_SET(so, events, fdset ) 1 /*specific for Unix API */
143
144#endif /* defined(RT_OS_WINDOWS) */
145
146#define TCP_ENGAGE_EVENT1(so, fdset) \
147 DO_ENGAGE_EVENT1((so), fdset, tcp)
148
149#define TCP_ENGAGE_EVENT2(so, fdset1, fdset2) \
150 DO_ENGAGE_EVENT2((so), fdset1, fdset2, tcp)
151
152#define UDP_ENGAGE_EVENT(so, fdset) \
153 DO_ENGAGE_EVENT1((so), fdset, udp)
154
155#define POLL_TCP_EVENTS(rc, error, so, events) \
156 DO_POLL_EVENTS((rc), (error), (so), (events), tcp)
157
158#define POLL_UDP_EVENTS(rc, error, so, events) \
159 DO_POLL_EVENTS((rc), (error), (so), (events), udp)
160
161#define CHECK_FD_SET(so, events, set) \
162 (DO_CHECK_FD_SET((so), (events), set))
163
164#define WIN_CHECK_FD_SET(so, events, set) \
165 (DO_WIN_CHECK_FD_SET((so), (events), set))
166#define UNIX_CHECK_FD_SET(so, events, set) \
167 (DO_UNIX_CHECK_FD_SET(so, events, set))
168
169/*
170 * Loging macros
171 */
172#if VBOX_WITH_DEBUG_NAT_SOCKETS
173# if defined(RT_OS_WINDOWS)
174# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
175 do { \
176 LogRel((" " #proto " %R[natsock] %R[natwinnetevents]\n", (so), (winevent))); \
177 } while (0)
178# else /* RT_OS_WINDOWS */
179# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
180 do { \
181 LogRel((" " #proto " %R[natsock] %s %s %s er: %s, %s, %s\n", (so), \
182 CHECK_FD_SET(so, ign ,r_fdset) ? "READ":"", \
183 CHECK_FD_SET(so, ign, w_fdset) ? "WRITE":"", \
184 CHECK_FD_SET(so, ign, x_fdset) ? "OOB":"", \
185 CHECK_FD_SET(so, ign, rderr) ? "RDERR":"", \
186 CHECK_FD_SET(so, ign, rdhup) ? "RDHUP":"", \
187 CHECK_FD_SET(so, ign, nval) ? "RDNVAL":"")); \
188 } while (0)
189# endif /* !RT_OS_WINDOWS */
190#else /* VBOX_WITH_DEBUG_NAT_SOCKETS */
191# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) do {} while (0)
192#endif /* !VBOX_WITH_DEBUG_NAT_SOCKETS */
193
194#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)
195
196static void activate_port_forwarding(PNATState, struct ethhdr *);
197
198static const uint8_t special_ethaddr[6] =
199{
200 0x52, 0x54, 0x00, 0x12, 0x35, 0x00
201};
202
203static const uint8_t broadcast_ethaddr[6] =
204{
205 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
206};
207
208const uint8_t zerro_ethaddr[6] =
209{
210 0x0, 0x0, 0x0, 0x0, 0x0, 0x0
211};
212
213#ifdef RT_OS_WINDOWS
214static int get_dns_addr_domain(PNATState pData, bool fVerbose,
215 struct in_addr *pdns_addr,
216 const char **ppszDomain)
217{
218 ULONG flags = GAA_FLAG_INCLUDE_PREFIX; /*GAA_FLAG_INCLUDE_ALL_INTERFACES;*/ /* all interfaces registered in NDIS */
219 PIP_ADAPTER_ADDRESSES pAdapterAddr = NULL;
220 PIP_ADAPTER_ADDRESSES pAddr = NULL;
221 PIP_ADAPTER_DNS_SERVER_ADDRESS pDnsAddr = NULL;
222 ULONG size;
223 int wlen = 0;
224 char *pszSuffix;
225 struct dns_domain_entry *pDomain = NULL;
226 ULONG ret = ERROR_SUCCESS;
227
228 /* @todo add SKIPing flags to get only required information */
229
230 /* determine size of buffer */
231 size = 0;
232 ret = pData->pfGetAdaptersAddresses(AF_INET, 0, NULL /* reserved */, pAdapterAddr, &size);
233 if (ret != ERROR_BUFFER_OVERFLOW)
234 {
235 LogRel(("NAT: error %lu occurred on capacity detection operation\n", ret));
236 return -1;
237 }
238 if (size == 0)
239 {
240 LogRel(("NAT: Win socket API returns non capacity\n"));
241 return -1;
242 }
243
244 pAdapterAddr = RTMemAllocZ(size);
245 if (!pAdapterAddr)
246 {
247 LogRel(("NAT: No memory available \n"));
248 return -1;
249 }
250 ret = pData->pfGetAdaptersAddresses(AF_INET, 0, NULL /* reserved */, pAdapterAddr, &size);
251 if (ret != ERROR_SUCCESS)
252 {
253 LogRel(("NAT: error %lu occurred on fetching adapters info\n", ret));
254 RTMemFree(pAdapterAddr);
255 return -1;
256 }
257
258 for (pAddr = pAdapterAddr; pAddr != NULL; pAddr = pAddr->Next)
259 {
260 int found;
261 if (pAddr->OperStatus != IfOperStatusUp)
262 continue;
263
264 for (pDnsAddr = pAddr->FirstDnsServerAddress; pDnsAddr != NULL; pDnsAddr = pDnsAddr->Next)
265 {
266 struct sockaddr *SockAddr = pDnsAddr->Address.lpSockaddr;
267 struct in_addr InAddr;
268 struct dns_entry *pDns;
269
270 if (SockAddr->sa_family != AF_INET)
271 continue;
272
273 InAddr = ((struct sockaddr_in *)SockAddr)->sin_addr;
274
275 /* add dns server to list */
276 pDns = RTMemAllocZ(sizeof(struct dns_entry));
277 if (!pDns)
278 {
279 LogRel(("NAT: Can't allocate buffer for DNS entry\n"));
280 RTMemFree(pAdapterAddr);
281 return VERR_NO_MEMORY;
282 }
283
284 LogRel(("NAT: adding %R[IP4] to DNS server list\n", &InAddr));
285 if ((InAddr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET))
286 pDns->de_addr.s_addr = htonl(ntohl(pData->special_addr.s_addr) | CTL_ALIAS);
287 else
288 pDns->de_addr.s_addr = InAddr.s_addr;
289
290 TAILQ_INSERT_HEAD(&pData->pDnsList, pDns, de_list);
291
292 if (pAddr->DnsSuffix == NULL)
293 continue;
294
295 /* uniq */
296 RTUtf16ToUtf8(pAddr->DnsSuffix, &pszSuffix);
297 if (!pszSuffix || strlen(pszSuffix) == 0)
298 {
299 RTStrFree(pszSuffix);
300 continue;
301 }
302
303 found = 0;
304 LIST_FOREACH(pDomain, &pData->pDomainList, dd_list)
305 {
306 if ( pDomain->dd_pszDomain != NULL
307 && strcmp(pDomain->dd_pszDomain, pszSuffix) == 0)
308 {
309 found = 1;
310 RTStrFree(pszSuffix);
311 break;
312 }
313 }
314 if (!found)
315 {
316 pDomain = RTMemAllocZ(sizeof(struct dns_domain_entry));
317 if (!pDomain)
318 {
319 LogRel(("NAT: not enough memory\n"));
320 RTStrFree(pszSuffix);
321 RTMemFree(pAdapterAddr);
322 return VERR_NO_MEMORY;
323 }
324 pDomain->dd_pszDomain = pszSuffix;
325 LogRel(("NAT: adding domain name %s to search list\n", pDomain->dd_pszDomain));
326 LIST_INSERT_HEAD(&pData->pDomainList, pDomain, dd_list);
327 }
328 }
329 }
330 RTMemFree(pAdapterAddr);
331 return 0;
332}
333
334#else /* !RT_OS_WINDOWS */
335
336static int RTFileGets(RTFILE File, void *pvBuf, size_t cbBufSize, size_t *pcbRead)
337{
338 size_t cbRead;
339 char bTest;
340 int rc = VERR_NO_MEMORY;
341 char *pu8Buf = (char *)pvBuf;
342 *pcbRead = 0;
343
344 while ( RT_SUCCESS(rc = RTFileRead(File, &bTest, 1, &cbRead))
345 && (pu8Buf - (char *)pvBuf) < cbBufSize)
346 {
347 if (cbRead == 0)
348 return VERR_EOF;
349
350 if (bTest == '\r' || bTest == '\n')
351 {
352 *pu8Buf = 0;
353 return VINF_SUCCESS;
354 }
355 *pu8Buf = bTest;
356 pu8Buf++;
357 (*pcbRead)++;
358 }
359 return rc;
360}
361
362static int get_dns_addr_domain(PNATState pData, bool fVerbose,
363 struct in_addr *pdns_addr,
364 const char **ppszDomain)
365{
366 char buff[512];
367 char buff2[256];
368 RTFILE f;
369 int found = 0;
370 struct in_addr tmp_addr;
371 int rc;
372 size_t bytes;
373
374#ifdef RT_OS_OS2
375 /* Try various locations. */
376 char *etc = getenv("ETC");
377 if (etc)
378 {
379 RTStrmPrintf(buff, sizeof(buff), "%s/RESOLV2", etc);
380 rc = RTFileOpen(&f, buff, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
381 }
382 if (RT_FAILURE(rc))
383 {
384 RTStrmPrintf(buff, sizeof(buff), "%s/RESOLV2", _PATH_ETC);
385 rc = RTFileOpen(&f, buff, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
386 }
387 if (RT_FAILURE(rc))
388 {
389 RTStrmPrintf(buff, sizeof(buff), "%s/resolv.conf", _PATH_ETC);
390 rc = RTFileOpen(&f, buff, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
391 }
392#else
393# ifndef DEBUG_vvl
394 rc = RTFileOpen(&f, "/etc/resolv.conf", RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
395# else
396 char *home = getenv("HOME");
397 RTStrPrintf(buff, sizeof(buff), "%s/resolv.conf", home);
398 rc = RTFileOpen(&f, buff, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
399 if (RT_SUCCESS(rc))
400 {
401 Log(("NAT: DNS we're using %s\n", buff));
402 }
403 else
404 {
405 rc = RTFileOpen(&f, "/etc/resolv.conf", RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
406 Log(("NAT: DNS we're using %s\n", buff));
407 }
408# endif
409#endif
410 if (RT_FAILURE(rc))
411 return -1;
412
413 if (ppszDomain)
414 *ppszDomain = NULL;
415
416 Log(("NAT: DNS Servers:\n"));
417 while ( RT_SUCCESS(rc = RTFileGets(f, buff, 512, &bytes))
418 && rc != VERR_EOF)
419 {
420 struct dns_entry *pDns = NULL;
421 if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1)
422 {
423 if (!inet_aton(buff2, &tmp_addr))
424 continue;
425
426 /* localhost mask */
427 pDns = RTMemAllocZ(sizeof (struct dns_entry));
428 if (!pDns)
429 {
430 LogRel(("can't alloc memory for DNS entry\n"));
431 return -1;
432 }
433
434 /* check */
435 pDns->de_addr.s_addr = tmp_addr.s_addr;
436 if ((pDns->de_addr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET))
437 {
438 pDns->de_addr.s_addr = htonl(ntohl(pData->special_addr.s_addr) | CTL_ALIAS);
439 }
440 TAILQ_INSERT_HEAD(&pData->pDnsList, pDns, de_list);
441 found++;
442 }
443 if ((!strncmp(buff, "domain", 6) || !strncmp(buff, "search", 6)))
444 {
445 char *tok;
446 char *saveptr;
447 struct dns_domain_entry *pDomain = NULL;
448 int found = 0;
449 tok = strtok_r(&buff[6], " \t\n", &saveptr);
450 LIST_FOREACH(pDomain, &pData->pDomainList, dd_list)
451 {
452 if ( tok != NULL
453 && strcmp(tok, pDomain->dd_pszDomain) == 0)
454 {
455 found = 1;
456 break;
457 }
458 }
459 if (tok != NULL && found == 0)
460 {
461 pDomain = RTMemAllocZ(sizeof(struct dns_domain_entry));
462 if (!pDomain)
463 {
464 LogRel(("NAT: not enought memory to add domain list\n"));
465 return VERR_NO_MEMORY;
466 }
467 pDomain->dd_pszDomain = RTStrDup(tok);
468 LogRel(("NAT: adding domain name %s to search list\n", pDomain->dd_pszDomain));
469 LIST_INSERT_HEAD(&pData->pDomainList, pDomain, dd_list);
470 }
471 }
472 }
473 RTFileClose(f);
474 if (!found)
475 return -1;
476 return 0;
477}
478
479#endif
480
481static int slirp_init_dns_list(PNATState pData)
482{
483 TAILQ_INIT(&pData->pDnsList);
484 LIST_INIT(&pData->pDomainList);
485 return get_dns_addr_domain(pData, true, NULL, NULL);
486}
487
488static void slirp_release_dns_list(PNATState pData)
489{
490 struct dns_entry *pDns = NULL;
491 struct dns_domain_entry *pDomain = NULL;
492
493 while (!TAILQ_EMPTY(&pData->pDnsList))
494 {
495 pDns = TAILQ_FIRST(&pData->pDnsList);
496 TAILQ_REMOVE(&pData->pDnsList, pDns, de_list);
497 RTMemFree(pDns);
498 }
499
500 while (!LIST_EMPTY(&pData->pDomainList))
501 {
502 pDomain = LIST_FIRST(&pData->pDomainList);
503 LIST_REMOVE(pDomain, dd_list);
504 if (pDomain->dd_pszDomain != NULL)
505 RTStrFree(pDomain->dd_pszDomain);
506 RTMemFree(pDomain);
507 }
508}
509
510int get_dns_addr(PNATState pData, struct in_addr *pdns_addr)
511{
512 return get_dns_addr_domain(pData, false, pdns_addr, NULL);
513}
514
515#ifndef VBOX_WITH_NAT_SERVICE
516int slirp_init(PNATState *ppData, const char *pszNetAddr, uint32_t u32Netmask,
517 bool fPassDomain, bool fUseHostResolver, void *pvUser)
518#else
519int slirp_init(PNATState *ppData, uint32_t u32NetAddr, uint32_t u32Netmask,
520 bool fPassDomain, void *pvUser)
521#endif
522{
523 int fNATfailed = 0;
524 int rc;
525 PNATState pData = RTMemAllocZ(sizeof(NATState));
526 *ppData = pData;
527 if (!pData)
528 return VERR_NO_MEMORY;
529 if (u32Netmask & 0x1f)
530 /* CTL is x.x.x.15, bootp passes up to 16 IPs (15..31) */
531 return VERR_INVALID_PARAMETER;
532 pData->fPassDomain = !fUseHostResolver ? fPassDomain : false;
533 pData->use_host_resolver = fUseHostResolver;
534 pData->pvUser = pvUser;
535 pData->netmask = u32Netmask;
536
537 /* sockets & TCP defaults */
538 pData->socket_rcv = 64 * _1K;
539 pData->socket_snd = 64 * _1K;
540 tcp_sndspace = 64 * _1K;
541 tcp_rcvspace = 64 * _1K;
542
543#ifdef RT_OS_WINDOWS
544 {
545 WSADATA Data;
546 WSAStartup(MAKEWORD(2, 0), &Data);
547 }
548 pData->phEvents[VBOX_SOCKET_EVENT_INDEX] = CreateEvent(NULL, FALSE, FALSE, NULL);
549#endif
550#ifdef VBOX_WITH_SLIRP_MT
551 QSOCKET_LOCK_CREATE(tcb);
552 QSOCKET_LOCK_CREATE(udb);
553 rc = RTReqCreateQueue(&pData->pReqQueue);
554 AssertReleaseRC(rc);
555#endif
556
557 link_up = 1;
558
559 rc = bootp_dhcp_init(pData);
560 if (rc != 0)
561 {
562 LogRel(("NAT: DHCP server initialization was failed\n"));
563 return VINF_NAT_DNS;
564 }
565 debug_init();
566 if_init(pData);
567 ip_init(pData);
568 icmp_init(pData);
569
570 /* Initialise mbufs *after* setting the MTU */
571#ifndef VBOX_WITH_SLIRP_BSD_MBUF
572 m_init(pData);
573#else
574 mbuf_init(pData);
575#endif
576
577#ifndef VBOX_WITH_NAT_SERVICE
578 inet_aton(pszNetAddr, &pData->special_addr);
579#else
580 pData->special_addr.s_addr = u32NetAddr;
581#endif
582 pData->slirp_ethaddr = &special_ethaddr[0];
583 alias_addr.s_addr = pData->special_addr.s_addr | htonl(CTL_ALIAS);
584 /* @todo: add ability to configure this staff */
585
586 /* set default addresses */
587 inet_aton("127.0.0.1", &loopback_addr);
588 if (!pData->use_host_resolver)
589 {
590 if (slirp_init_dns_list(pData) < 0)
591 fNATfailed = 1;
592
593 dnsproxy_init(pData);
594 }
595
596 getouraddr(pData);
597 {
598 int flags = 0;
599 struct in_addr proxy_addr;
600 pData->proxy_alias = LibAliasInit(pData, NULL);
601 if (pData->proxy_alias == NULL)
602 {
603 LogRel(("NAT: LibAlias default rule wasn't initialized\n"));
604 AssertMsgFailed(("NAT: LibAlias default rule wasn't initialized\n"));
605 }
606 flags = LibAliasSetMode(pData->proxy_alias, 0, 0);
607#ifndef NO_FW_PUNCH
608 flags |= PKT_ALIAS_PUNCH_FW;
609#endif
610 flags |= PKT_ALIAS_LOG; /* set logging */
611 flags = LibAliasSetMode(pData->proxy_alias, flags, ~0);
612 proxy_addr.s_addr = htonl(ntohl(pData->special_addr.s_addr) | CTL_ALIAS);
613 LibAliasSetAddress(pData->proxy_alias, proxy_addr);
614 ftp_alias_load(pData);
615 nbt_alias_load(pData);
616 if (pData->use_host_resolver)
617 dns_alias_load(pData);
618 }
619 return fNATfailed ? VINF_NAT_DNS : VINF_SUCCESS;
620}
621
622/**
623 * Register statistics.
624 */
625void slirp_register_statistics(PNATState pData, PPDMDRVINS pDrvIns)
626{
627#ifdef VBOX_WITH_STATISTICS
628# define PROFILE_COUNTER(name, dsc) REGISTER_COUNTER(name, pData, STAMTYPE_PROFILE, STAMUNIT_TICKS_PER_CALL, dsc)
629# define COUNTING_COUNTER(name, dsc) REGISTER_COUNTER(name, pData, STAMTYPE_COUNTER, STAMUNIT_COUNT, dsc)
630# include "counters.h"
631# undef COUNTER
632/** @todo register statistics for the variables dumped by:
633 * ipstats(pData); tcpstats(pData); udpstats(pData); icmpstats(pData);
634 * mbufstats(pData); sockstats(pData); */
635#endif /* VBOX_WITH_STATISTICS */
636}
637
638/**
639 * Deregister statistics.
640 */
641void slirp_deregister_statistics(PNATState pData, PPDMDRVINS pDrvIns)
642{
643#ifdef VBOX_WITH_STATISTICS
644# define PROFILE_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pData)
645# define COUNTING_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pData)
646# include "counters.h"
647#endif /* VBOX_WITH_STATISTICS */
648}
649
650/**
651 * Marks the link as up, making it possible to establish new connections.
652 */
653void slirp_link_up(PNATState pData)
654{
655 link_up = 1;
656}
657
658/**
659 * Marks the link as down and cleans up the current connections.
660 */
661void slirp_link_down(PNATState pData)
662{
663 struct socket *so;
664
665 while ((so = tcb.so_next) != &tcb)
666 {
667 if (so->so_state & SS_NOFDREF || so->s == -1)
668 sofree(pData, so);
669 else
670 tcp_drop(pData, sototcpcb(so), 0);
671 }
672
673 while ((so = udb.so_next) != &udb)
674 udp_detach(pData, so);
675
676 link_up = 0;
677}
678
679/**
680 * Terminates the slirp component.
681 */
682void slirp_term(PNATState pData)
683{
684#ifdef RT_OS_WINDOWS
685 pData->pfIcmpCloseHandle(pData->icmp_socket.sh);
686 FreeLibrary(pData->hmIcmpLibrary);
687 RTMemFree(pData->pvIcmpBuffer);
688#else
689 closesocket(pData->icmp_socket.s);
690#endif
691
692 slirp_link_down(pData);
693 slirp_release_dns_list(pData);
694 ftp_alias_unload(pData);
695 nbt_alias_unload(pData);
696 if (pData->use_host_resolver)
697 dns_alias_unload(pData);
698 while (!LIST_EMPTY(&instancehead))
699 {
700 struct libalias *la = LIST_FIRST(&instancehead);
701 /* libalias do all clean up */
702 LibAliasUninit(la);
703 }
704 while (!LIST_EMPTY(&pData->arp_cache))
705 {
706 struct arp_cache_entry *ac = LIST_FIRST(&pData->arp_cache);
707 LIST_REMOVE(ac, list);
708 RTMemFree(ac);
709 }
710 bootp_dhcp_fini(pData);
711 m_fini(pData);
712#ifdef RT_OS_WINDOWS
713 WSACleanup();
714#endif
715#ifdef LOG_ENABLED
716 Log(("\n"
717 "NAT statistics\n"
718 "--------------\n"
719 "\n"));
720 ipstats(pData);
721 tcpstats(pData);
722 udpstats(pData);
723 icmpstats(pData);
724 mbufstats(pData);
725 sockstats(pData);
726 Log(("\n"
727 "\n"
728 "\n"));
729#endif
730 RTMemFree(pData);
731}
732
733
734#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
735#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
736
737/*
738 * curtime kept to an accuracy of 1ms
739 */
740static void updtime(PNATState pData)
741{
742#ifdef RT_OS_WINDOWS
743 struct _timeb tb;
744
745 _ftime(&tb);
746 curtime = (u_int)tb.time * (u_int)1000;
747 curtime += (u_int)tb.millitm;
748#else
749 gettimeofday(&tt, 0);
750
751 curtime = (u_int)tt.tv_sec * (u_int)1000;
752 curtime += (u_int)tt.tv_usec / (u_int)1000;
753
754 if ((tt.tv_usec % 1000) >= 500)
755 curtime++;
756#endif
757}
758
759#ifdef RT_OS_WINDOWS
760void slirp_select_fill(PNATState pData, int *pnfds)
761#else /* RT_OS_WINDOWS */
762void slirp_select_fill(PNATState pData, int *pnfds, struct pollfd *polls)
763#endif /* !RT_OS_WINDOWS */
764{
765 struct socket *so, *so_next;
766 int nfds;
767#if defined(RT_OS_WINDOWS)
768 int rc;
769 int error;
770#else
771 int poll_index = 0;
772#endif
773 int i;
774
775 STAM_PROFILE_START(&pData->StatFill, a);
776
777 nfds = *pnfds;
778
779 /*
780 * First, TCP sockets
781 */
782 do_slowtimo = 0;
783 if (!link_up)
784 goto done;
785
786 /*
787 * *_slowtimo needs calling if there are IP fragments
788 * in the fragment queue, or there are TCP connections active
789 */
790 /* XXX:
791 * triggering of fragment expiration should be the same but use new macroses
792 */
793 do_slowtimo = (tcb.so_next != &tcb);
794 if (!do_slowtimo)
795 {
796 for (i = 0; i < IPREASS_NHASH; i++)
797 {
798 if (!TAILQ_EMPTY(&ipq[i]))
799 {
800 do_slowtimo = 1;
801 slirp_arm_slow_timer(pData->pvUser);
802 break;
803 }
804 }
805 }
806 ICMP_ENGAGE_EVENT(&pData->icmp_socket, readfds);
807
808 STAM_COUNTER_RESET(&pData->StatTCP);
809 STAM_COUNTER_RESET(&pData->StatTCPHot);
810
811 QSOCKET_FOREACH(so, so_next, tcp)
812 /* { */
813#if !defined(RT_OS_WINDOWS)
814 so->so_poll_index = -1;
815#endif
816 if (pData->fmbuf_water_line == 1)
817 {
818 if (mbuf_alloced < pData->mbuf_water_line_limit/2)
819 {
820 pData->fmbuf_water_warn_sent = 0;
821 pData->fmbuf_water_line = 0;
822 }
823#ifndef RT_OS_WINDOWS
824 poll_index = 0;
825#endif
826 goto done;
827 }
828 STAM_COUNTER_INC(&pData->StatTCP);
829
830 /*
831 * See if we need a tcp_fasttimo
832 */
833 if ( time_fasttimo == 0
834 && so->so_tcpcb != NULL
835 && so->so_tcpcb->t_flags & TF_DELACK)
836 {
837 time_fasttimo = curtime; /* Flag when we want a fasttimo */
838 slirp_arm_fast_timer(pData->pvUser);
839 }
840
841 /*
842 * NOFDREF can include still connecting to local-host,
843 * newly socreated() sockets etc. Don't want to select these.
844 */
845 if (so->so_state & SS_NOFDREF || so->s == -1)
846 CONTINUE(tcp);
847
848 /*
849 * Set for reading sockets which are accepting
850 */
851 if (so->so_state & SS_FACCEPTCONN)
852 {
853 STAM_COUNTER_INC(&pData->StatTCPHot);
854 TCP_ENGAGE_EVENT1(so, readfds);
855 CONTINUE(tcp);
856 }
857
858 /*
859 * Set for writing sockets which are connecting
860 */
861 if (so->so_state & SS_ISFCONNECTING)
862 {
863 Log2(("connecting %R[natsock] engaged\n",so));
864 STAM_COUNTER_INC(&pData->StatTCPHot);
865 TCP_ENGAGE_EVENT1(so, writefds);
866 }
867
868 /*
869 * Set for writing if we are connected, can send more, and
870 * we have something to send
871 */
872 if (CONN_CANFSEND(so) && so->so_rcv.sb_cc)
873 {
874 STAM_COUNTER_INC(&pData->StatTCPHot);
875 TCP_ENGAGE_EVENT1(so, writefds);
876 }
877
878 /*
879 * Set for reading (and urgent data) if we are connected, can
880 * receive more, and we have room for it XXX /2 ?
881 */
882 if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2)))
883 {
884 STAM_COUNTER_INC(&pData->StatTCPHot);
885 TCP_ENGAGE_EVENT2(so, readfds, xfds);
886 }
887 LOOP_LABEL(tcp, so, so_next);
888 }
889
890 /*
891 * UDP sockets
892 */
893 STAM_COUNTER_RESET(&pData->StatUDP);
894 STAM_COUNTER_RESET(&pData->StatUDPHot);
895
896 QSOCKET_FOREACH(so, so_next, udp)
897 /* { */
898
899 if (pData->fmbuf_water_line == 1)
900 {
901 if (mbuf_alloced < pData->mbuf_water_line_limit/2)
902 {
903 pData->fmbuf_water_line = 0;
904 pData->fmbuf_water_warn_sent = 0;
905 }
906#ifndef RT_OS_WINDOWS
907 poll_index = 0;
908#endif
909 goto done;
910 }
911 STAM_COUNTER_INC(&pData->StatUDP);
912#if !defined(RT_OS_WINDOWS)
913 so->so_poll_index = -1;
914#endif
915
916 /*
917 * See if it's timed out
918 */
919 if (so->so_expire)
920 {
921 if (so->so_expire <= curtime)
922 {
923 Log2(("NAT: %R[natsock] expired\n", so));
924 if (so->so_timeout != NULL)
925 {
926 so->so_timeout(pData, so, so->so_timeout_arg);
927 }
928#ifdef VBOX_WITH_SLIRP_MT
929 /* we need so_next for continue our cycle*/
930 so_next = so->so_next;
931#endif
932 UDP_DETACH(pData, so, so_next);
933 CONTINUE_NO_UNLOCK(udp);
934 }
935 else
936 {
937 do_slowtimo = 1; /* Let socket expire */
938 slirp_arm_slow_timer(pData->pvUser);
939 }
940 }
941
942 /*
943 * When UDP packets are received from over the link, they're
944 * sendto()'d straight away, so no need for setting for writing
945 * Limit the number of packets queued by this session to 4.
946 * Note that even though we try and limit this to 4 packets,
947 * the session could have more queued if the packets needed
948 * to be fragmented.
949 *
950 * (XXX <= 4 ?)
951 */
952 if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4)
953 {
954 STAM_COUNTER_INC(&pData->StatUDPHot);
955 UDP_ENGAGE_EVENT(so, readfds);
956 }
957 LOOP_LABEL(udp, so, so_next);
958 }
959done:
960
961#if defined(RT_OS_WINDOWS)
962 *pnfds = VBOX_EVENT_COUNT;
963#else /* RT_OS_WINDOWS */
964 AssertRelease(poll_index <= *pnfds);
965 *pnfds = poll_index;
966#endif /* !RT_OS_WINDOWS */
967
968 STAM_PROFILE_STOP(&pData->StatFill, a);
969}
970
971#if defined(RT_OS_WINDOWS)
972void slirp_select_poll(PNATState pData, int fTimeout, int fIcmp)
973#else /* RT_OS_WINDOWS */
974void slirp_select_poll(PNATState pData, struct pollfd *polls, int ndfs)
975#endif /* !RT_OS_WINDOWS */
976{
977 struct socket *so, *so_next;
978 int ret;
979#if defined(RT_OS_WINDOWS)
980 WSANETWORKEVENTS NetworkEvents;
981 int rc;
982 int error;
983#else
984 int poll_index = 0;
985#endif
986
987 STAM_PROFILE_START(&pData->StatPoll, a);
988
989 /* Update time */
990 updtime(pData);
991
992 /*
993 * See if anything has timed out
994 */
995 if (link_up)
996 {
997 if (time_fasttimo && ((curtime - time_fasttimo) >= 2))
998 {
999 STAM_PROFILE_START(&pData->StatFastTimer, a);
1000 tcp_fasttimo(pData);
1001 time_fasttimo = 0;
1002 STAM_PROFILE_STOP(&pData->StatFastTimer, a);
1003 }
1004 if (do_slowtimo && ((curtime - last_slowtimo) >= 499))
1005 {
1006 STAM_PROFILE_START(&pData->StatSlowTimer, a);
1007 ip_slowtimo(pData);
1008 tcp_slowtimo(pData);
1009 last_slowtimo = curtime;
1010 STAM_PROFILE_STOP(&pData->StatSlowTimer, a);
1011 }
1012 }
1013#if defined(RT_OS_WINDOWS)
1014 if (fTimeout)
1015 return; /* only timer update */
1016#endif
1017
1018 /*
1019 * Check sockets
1020 */
1021 if (!link_up)
1022 goto done;
1023#if defined(RT_OS_WINDOWS)
1024 /*XXX: before renaming please make see define
1025 * fIcmp in slirp_state.h
1026 */
1027 if (fIcmp)
1028 sorecvfrom(pData, &pData->icmp_socket);
1029#else
1030 if ( (pData->icmp_socket.s != -1)
1031 && CHECK_FD_SET(&pData->icmp_socket, ignored, readfds))
1032 sorecvfrom(pData, &pData->icmp_socket);
1033#endif
1034 /*
1035 * Check TCP sockets
1036 */
1037 QSOCKET_FOREACH(so, so_next, tcp)
1038 /* { */
1039 if (pData->fmbuf_water_line == 1)
1040 {
1041 if (mbuf_alloced < pData->mbuf_water_line_limit/2)
1042 {
1043 pData->fmbuf_water_line = 0;
1044 pData->fmbuf_water_warn_sent = 0;
1045 }
1046 goto done;
1047 }
1048
1049#ifdef VBOX_WITH_SLIRP_MT
1050 if ( so->so_state & SS_NOFDREF
1051 && so->so_deleted == 1)
1052 {
1053 struct socket *son, *sop = NULL;
1054 QSOCKET_LOCK(tcb);
1055 if (so->so_next != NULL)
1056 {
1057 if (so->so_next != &tcb)
1058 SOCKET_LOCK(so->so_next);
1059 son = so->so_next;
1060 }
1061 if ( so->so_prev != &tcb
1062 && so->so_prev != NULL)
1063 {
1064 SOCKET_LOCK(so->so_prev);
1065 sop = so->so_prev;
1066 }
1067 QSOCKET_UNLOCK(tcb);
1068 remque(pData, so);
1069 NSOCK_DEC();
1070 SOCKET_UNLOCK(so);
1071 SOCKET_LOCK_DESTROY(so);
1072 RTMemFree(so);
1073 so_next = son;
1074 if (sop != NULL)
1075 SOCKET_UNLOCK(sop);
1076 CONTINUE_NO_UNLOCK(tcp);
1077 }
1078#endif
1079 /*
1080 * FD_ISSET is meaningless on these sockets
1081 * (and they can crash the program)
1082 */
1083 if (so->so_state & SS_NOFDREF || so->s == -1)
1084 CONTINUE(tcp);
1085
1086 POLL_TCP_EVENTS(rc, error, so, &NetworkEvents);
1087
1088 LOG_NAT_SOCK(so, TCP, &NetworkEvents, readfds, writefds, xfds);
1089
1090
1091 /*
1092 * Check for URG data
1093 * This will soread as well, so no need to
1094 * test for readfds below if this succeeds
1095 */
1096
1097 /* out-of-band data */
1098 if (CHECK_FD_SET(so, NetworkEvents, xfds))
1099 {
1100 sorecvoob(pData, so);
1101 }
1102
1103 /*
1104 * Check sockets for reading
1105 */
1106 else if ( CHECK_FD_SET(so, NetworkEvents, readfds)
1107 || WIN_CHECK_FD_SET(so, NetworkEvents, acceptds))
1108 {
1109 /*
1110 * Check for incoming connections
1111 */
1112 if (so->so_state & SS_FACCEPTCONN)
1113 {
1114 TCP_CONNECT(pData, so);
1115#if defined(RT_OS_WINDOWS)
1116 if (!(NetworkEvents.lNetworkEvents & FD_CLOSE))
1117#endif
1118 CONTINUE(tcp);
1119 }
1120
1121 ret = soread(pData, so);
1122 /* Output it if we read something */
1123 if (RT_LIKELY(ret > 0))
1124 TCP_OUTPUT(pData, sototcpcb(so));
1125 }
1126
1127#if defined(RT_OS_WINDOWS)
1128 /*
1129 * Check for FD_CLOSE events.
1130 * in some cases once FD_CLOSE engaged on socket it could be flashed latter (for some reasons)
1131 */
1132 if ( (NetworkEvents.lNetworkEvents & FD_CLOSE)
1133 || (so->so_close == 1))
1134 {
1135 so->so_close = 1; /* mark it */
1136 /*
1137 * drain the socket
1138 */
1139 for (;;)
1140 {
1141 ret = soread(pData, so);
1142 if (ret > 0)
1143 TCP_OUTPUT(pData, sototcpcb(so));
1144 else
1145 break;
1146 }
1147 CONTINUE(tcp);
1148 }
1149#endif
1150
1151 /*
1152 * Check sockets for writing
1153 */
1154 if (CHECK_FD_SET(so, NetworkEvents, writefds))
1155 {
1156 /*
1157 * Check for non-blocking, still-connecting sockets
1158 */
1159 if (so->so_state & SS_ISFCONNECTING)
1160 {
1161 Log2(("connecting %R[natsock] catched\n", so));
1162 /* Connected */
1163 so->so_state &= ~SS_ISFCONNECTING;
1164
1165 /*
1166 * This should be probably guarded by PROBE_CONN too. Anyway,
1167 * we disable it on OS/2 because the below send call returns
1168 * EFAULT which causes the opened TCP socket to close right
1169 * after it has been opened and connected.
1170 */
1171#ifndef RT_OS_OS2
1172 ret = send(so->s, (const char *)&ret, 0, 0);
1173 if (ret < 0)
1174 {
1175 /* XXXXX Must fix, zero bytes is a NOP */
1176 if ( errno == EAGAIN
1177 || errno == EWOULDBLOCK
1178 || errno == EINPROGRESS
1179 || errno == ENOTCONN)
1180 CONTINUE(tcp);
1181
1182 /* else failed */
1183 so->so_state = SS_NOFDREF;
1184 }
1185 /* else so->so_state &= ~SS_ISFCONNECTING; */
1186#endif
1187
1188 /*
1189 * Continue tcp_input
1190 */
1191 TCP_INPUT(pData, (struct mbuf *)NULL, sizeof(struct ip), so);
1192 /* continue; */
1193 }
1194 else
1195 SOWRITE(ret, pData, so);
1196 /*
1197 * XXX If we wrote something (a lot), there could be the need
1198 * for a window update. In the worst case, the remote will send
1199 * a window probe to get things going again.
1200 */
1201 }
1202
1203 /*
1204 * Probe a still-connecting, non-blocking socket
1205 * to check if it's still alive
1206 */
1207#ifdef PROBE_CONN
1208 if (so->so_state & SS_ISFCONNECTING)
1209 {
1210 ret = recv(so->s, (char *)&ret, 0, 0);
1211
1212 if (ret < 0)
1213 {
1214 /* XXX */
1215 if ( errno == EAGAIN
1216 || errno == EWOULDBLOCK
1217 || errno == EINPROGRESS
1218 || errno == ENOTCONN)
1219 {
1220 CONTINUE(tcp); /* Still connecting, continue */
1221 }
1222
1223 /* else failed */
1224 so->so_state = SS_NOFDREF;
1225
1226 /* tcp_input will take care of it */
1227 }
1228 else
1229 {
1230 ret = send(so->s, &ret, 0, 0);
1231 if (ret < 0)
1232 {
1233 /* XXX */
1234 if ( errno == EAGAIN
1235 || errno == EWOULDBLOCK
1236 || errno == EINPROGRESS
1237 || errno == ENOTCONN)
1238 {
1239 CONTINUE(tcp);
1240 }
1241 /* else failed */
1242 so->so_state = SS_NOFDREF;
1243 }
1244 else
1245 so->so_state &= ~SS_ISFCONNECTING;
1246
1247 }
1248 TCP_INPUT((struct mbuf *)NULL, sizeof(struct ip),so);
1249 } /* SS_ISFCONNECTING */
1250#endif
1251#ifndef RT_OS_WINDOWS
1252 if ( UNIX_CHECK_FD_SET(so, NetworkEvents, rdhup)
1253 || UNIX_CHECK_FD_SET(so, NetworkEvents, rderr))
1254 {
1255 int err;
1256 int inq, outq;
1257 int status;
1258 socklen_t optlen = sizeof(int);
1259 inq = outq = 0;
1260 status = getsockopt(so->s, SOL_SOCKET, SO_ERROR, &err, &optlen);
1261 if (status != 0)
1262 Log(("NAT: can't get error status from %R[natsock]\n", so));
1263#ifndef RT_OS_SOLARIS
1264 status = ioctl(so->s, FIONREAD, &inq); /* tcp(7) recommends SIOCINQ which is Linux specific */
1265 if (status != 0 || status != EINVAL)
1266 {
1267 /* EINVAL returned if socket in listen state tcp(7)*/
1268 Log(("NAT: can't get depth of IN queue status from %R[natsock]\n", so));
1269 }
1270 status = ioctl(so->s, TIOCOUTQ, &outq); /* SIOCOUTQ see previous comment */
1271 if (status != 0)
1272 Log(("NAT: can't get depth of OUT queue from %R[natsock]\n", so));
1273#else
1274 /*
1275 * Solaris has bit different ioctl commands and its handlings
1276 * hint: streamio(7) I_NREAD
1277 */
1278#endif
1279 if ( so->so_state & SS_ISFCONNECTING
1280 || UNIX_CHECK_FD_SET(so, NetworkEvents, readfds))
1281 {
1282 /**
1283 * Check if we need here take care about gracefull connection
1284 * @todo try with proxy server
1285 */
1286 if (UNIX_CHECK_FD_SET(so, NetworkEvents, readfds))
1287 {
1288 /*
1289 * Never meet inq != 0 or outq != 0, anyway let it stay for a while
1290 * in case it happens we'll able to detect it.
1291 * Give TCP/IP stack wait or expire the socket.
1292 */
1293 Log(("NAT: %R[natsock] err(%d:%s) s(in:%d,out:%d)happens on read I/O, "
1294 "other side close connection \n", so, err, strerror(err), inq, outq));
1295 CONTINUE(tcp);
1296 }
1297 goto tcp_input_close;
1298 }
1299 if ( !UNIX_CHECK_FD_SET(so, NetworkEvents, readfds)
1300 && !UNIX_CHECK_FD_SET(so, NetworkEvents, writefds)
1301 && !UNIX_CHECK_FD_SET(so, NetworkEvents, xfds))
1302 {
1303 Log(("NAT: system expires the socket %R[natsock] err(%d:%s) s(in:%d,out:%d) happens on non-I/O. ",
1304 so, err, strerror(err), inq, outq));
1305 goto tcp_input_close;
1306 }
1307 Log(("NAT: %R[natsock] we've met(%d:%s) s(in:%d, out:%d) unhandled combination hup (%d) "
1308 "rederr(%d) on (r:%d, w:%d, x:%d)\n",
1309 so, err, strerror(err),
1310 inq, outq,
1311 UNIX_CHECK_FD_SET(so, ign, rdhup),
1312 UNIX_CHECK_FD_SET(so, ign, rderr),
1313 UNIX_CHECK_FD_SET(so, ign, readfds),
1314 UNIX_CHECK_FD_SET(so, ign, writefds),
1315 UNIX_CHECK_FD_SET(so, ign, xfds)));
1316 /*
1317 * Give OS's TCP/IP stack a chance to resolve an issue or expire the socket.
1318 */
1319 CONTINUE(tcp);
1320tcp_input_close:
1321 so->so_state = SS_NOFDREF; /*cause connection valid tcp connection termination and socket closing */
1322 TCP_INPUT(pData, (struct mbuf *)NULL, sizeof(struct ip), so);
1323 CONTINUE(tcp);
1324 }
1325#endif
1326 LOOP_LABEL(tcp, so, so_next);
1327 }
1328
1329 /*
1330 * Now UDP sockets.
1331 * Incoming packets are sent straight away, they're not buffered.
1332 * Incoming UDP data isn't buffered either.
1333 */
1334 QSOCKET_FOREACH(so, so_next, udp)
1335 /* { */
1336 if (pData->fmbuf_water_line == 1)
1337 {
1338 if (mbuf_alloced < pData->mbuf_water_line_limit/2)
1339 {
1340 pData->fmbuf_water_line = 0;
1341 pData->fmbuf_water_warn_sent = 0;
1342 }
1343 goto done;
1344 }
1345#ifdef VBOX_WITH_SLIRP_MT
1346 if ( so->so_state & SS_NOFDREF
1347 && so->so_deleted == 1)
1348 {
1349 struct socket *son, *sop = NULL;
1350 QSOCKET_LOCK(udb);
1351 if (so->so_next != NULL)
1352 {
1353 if (so->so_next != &udb)
1354 SOCKET_LOCK(so->so_next);
1355 son = so->so_next;
1356 }
1357 if ( so->so_prev != &udb
1358 && so->so_prev != NULL)
1359 {
1360 SOCKET_LOCK(so->so_prev);
1361 sop = so->so_prev;
1362 }
1363 QSOCKET_UNLOCK(udb);
1364 remque(pData, so);
1365 NSOCK_DEC();
1366 SOCKET_UNLOCK(so);
1367 SOCKET_LOCK_DESTROY(so);
1368 RTMemFree(so);
1369 so_next = son;
1370 if (sop != NULL)
1371 SOCKET_UNLOCK(sop);
1372 CONTINUE_NO_UNLOCK(udp);
1373 }
1374#endif
1375 POLL_UDP_EVENTS(rc, error, so, &NetworkEvents);
1376
1377 LOG_NAT_SOCK(so, UDP, &NetworkEvents, readfds, writefds, xfds);
1378
1379 if (so->s != -1 && CHECK_FD_SET(so, NetworkEvents, readfds))
1380 {
1381 SORECVFROM(pData, so);
1382 }
1383 LOOP_LABEL(udp, so, so_next);
1384 }
1385
1386done:
1387#if 0
1388 /*
1389 * See if we can start outputting
1390 */
1391 if (if_queued && link_up)
1392 if_start(pData);
1393#endif
1394
1395 STAM_PROFILE_STOP(&pData->StatPoll, a);
1396}
1397
1398
1399struct arphdr
1400{
1401 unsigned short ar_hrd; /* format of hardware address */
1402 unsigned short ar_pro; /* format of protocol address */
1403 unsigned char ar_hln; /* length of hardware address */
1404 unsigned char ar_pln; /* length of protocol address */
1405 unsigned short ar_op; /* ARP opcode (command) */
1406
1407 /*
1408 * Ethernet looks like this : This bit is variable sized however...
1409 */
1410 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
1411 unsigned char ar_sip[4]; /* sender IP address */
1412 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
1413 unsigned char ar_tip[4]; /* target IP address */
1414};
1415AssertCompileSize(struct arphdr, 28);
1416
1417static void arp_input(PNATState pData, struct mbuf *m)
1418{
1419 struct ethhdr *eh;
1420 struct ethhdr *reh;
1421 struct arphdr *ah;
1422 struct arphdr *rah;
1423 int ar_op;
1424 struct ex_list *ex_ptr;
1425 uint32_t htip;
1426 uint32_t tip;
1427 struct mbuf *mr;
1428 eh = mtod(m, struct ethhdr *);
1429 ah = (struct arphdr *)&eh[1];
1430 htip = ntohl(*(uint32_t*)ah->ar_tip);
1431 tip = *(uint32_t*)ah->ar_tip;
1432
1433 ar_op = ntohs(ah->ar_op);
1434 switch (ar_op)
1435 {
1436 case ARPOP_REQUEST:
1437#ifndef VBOX_WITH_SLIRP_BSD_MBUF
1438 mr = m_get(pData);
1439
1440 reh = mtod(mr, struct ethhdr *);
1441 memcpy(reh->h_source, eh->h_source, ETH_ALEN); /* XXX: if_encap will swap src and dst*/
1442 Log4(("NAT: arp:%R[ether]->%R[ether]\n",
1443 reh->h_source, reh->h_dest));
1444 Log4(("NAT: arp: %R[IP4]\n", &tip));
1445
1446 mr->m_data += if_maxlinkhdr;
1447 mr->m_len = sizeof(struct arphdr);
1448 rah = mtod(mr, struct arphdr *);
1449#else
1450 mr = m_getcl(pData, M_NOWAIT, MT_HEADER, M_PKTHDR);
1451 reh = mtod(mr, struct ethhdr *);
1452 mr->m_data += ETH_HLEN;
1453 rah = mtod(mr, struct arphdr *);
1454 mr->m_len = sizeof(struct arphdr);
1455 Assert(mr);
1456 memcpy(reh->h_source, eh->h_source, ETH_ALEN); /* XXX: if_encap will swap src and dst*/
1457#endif
1458#ifdef VBOX_WITH_NAT_SERVICE
1459 if (tip == pData->special_addr.s_addr)
1460 goto arp_ok;
1461#endif
1462 if ((htip & pData->netmask) == ntohl(pData->special_addr.s_addr))
1463 {
1464 if ( CTL_CHECK(htip, CTL_DNS)
1465 || CTL_CHECK(htip, CTL_ALIAS)
1466 || CTL_CHECK(htip, CTL_TFTP))
1467 goto arp_ok;
1468 for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
1469 {
1470 if ((htip & ~pData->netmask) == ex_ptr->ex_addr)
1471 {
1472 goto arp_ok;
1473 }
1474 }
1475 m_free(pData, m);
1476 m_free(pData, mr);
1477 return;
1478
1479 arp_ok:
1480 rah->ar_hrd = htons(1);
1481 rah->ar_pro = htons(ETH_P_IP);
1482 rah->ar_hln = ETH_ALEN;
1483 rah->ar_pln = 4;
1484 rah->ar_op = htons(ARPOP_REPLY);
1485 memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN);
1486
1487 switch (htip & ~pData->netmask)
1488 {
1489 case CTL_DNS:
1490 case CTL_ALIAS:
1491 rah->ar_sha[5] = (uint8_t)(htip & ~pData->netmask);
1492 break;
1493 default:;
1494 }
1495
1496 memcpy(rah->ar_sip, ah->ar_tip, 4);
1497 memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN);
1498 memcpy(rah->ar_tip, ah->ar_sip, 4);
1499 if_encap(pData, ETH_P_ARP, mr, ETH_ENCAP_URG);
1500 m_free(pData, m);
1501 }
1502 /* Gratuitous ARP */
1503 if ( *(uint32_t *)ah->ar_sip == *(uint32_t *)ah->ar_tip
1504 && memcmp(ah->ar_tha, broadcast_ethaddr, ETH_ALEN) == 0
1505 && memcmp(eh->h_dest, broadcast_ethaddr, ETH_ALEN) == 0)
1506 {
1507 /* we've received anounce about address asignment
1508 * Let's do ARP cache update
1509 */
1510 if (slirp_arp_cache_update(pData, *(uint32_t *)ah->ar_tip, &eh->h_dest[0]) == 0)
1511 {
1512 m_free(pData, mr);
1513 m_free(pData, m);
1514 break;
1515 }
1516 slirp_arp_cache_add(pData, *(uint32_t *)ah->ar_tip, &eh->h_dest[0]);
1517 /* good opportunity to activate port-forwarding on address (self)asignment*/
1518 if (pData->port_forwarding_activated != pData->port_forwarding_count)
1519 activate_port_forwarding(pData, eh);
1520 }
1521 break;
1522
1523 case ARPOP_REPLY:
1524 if (slirp_arp_cache_update(pData, *(uint32_t *)ah->ar_sip, &ah->ar_sha[0]) == 0)
1525 {
1526 m_free(pData, m);
1527 break;
1528 }
1529 slirp_arp_cache_add(pData, *(uint32_t *)ah->ar_sip, ah->ar_sha);
1530 /* after/save restore we need up port forwarding again */
1531 if (pData->port_forwarding_activated != pData->port_forwarding_count)
1532 activate_port_forwarding(pData, eh);
1533 m_free(pData, m);
1534 break;
1535
1536 default:
1537 break;
1538 }
1539}
1540
1541#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1542void slirp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1543#else
1544void slirp_input(PNATState pData, void *pvArg)
1545#endif
1546{
1547 struct mbuf *m;
1548 int proto;
1549 static bool fWarnedIpv6;
1550#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1551 struct ethhdr *eh = (struct ethhdr*)pkt;
1552 int size = 0;
1553#else
1554 struct ethhdr *eh;
1555#endif
1556
1557#ifndef VBOX_WITH_SLIRP_BSD_MBUF
1558 m = (struct mbuf *)pvArg;
1559 if (m->m_len < ETH_HLEN)
1560 {
1561 LogRel(("NAT: packet having size %d has been ingnored\n", m->m_len));
1562 m_free(pData, m);
1563 return;
1564 }
1565 eh = mtod(m, struct ethhdr *);
1566 proto = ntohs(eh->h_proto);
1567#else
1568 Log2(("NAT: slirp_input %d\n", pkt_len));
1569 if (pkt_len < ETH_HLEN)
1570 {
1571 LogRel(("NAT: packet having size %d has been ingnored\n", pkt_len));
1572 return;
1573 }
1574 Log4(("NAT: in:%R[ether]->%R[ether]\n", &eh->h_source, &eh->h_dest));
1575
1576 if (memcmp(eh->h_source, special_ethaddr, ETH_ALEN) == 0)
1577 {
1578 /* @todo vasily: add ether logging routine in debug.c */
1579 Log(("NAT: packet was addressed to other MAC\n"));
1580 RTMemFree((void *)pkt);
1581 return;
1582 }
1583
1584 if (pkt_len < MSIZE)
1585 size = MCLBYTES;
1586 else if (pkt_len < MCLBYTES)
1587 size = MCLBYTES;
1588 else if (pkt_len < MJUM9BYTES)
1589 size = MJUM9BYTES;
1590 else if (pkt_len < MJUM16BYTES)
1591 size = MJUM16BYTES;
1592 else
1593 AssertMsgFailed(("Unsupported size"));
1594
1595 m = m_getjcl(pData, M_NOWAIT, MT_HEADER, M_PKTHDR, size);
1596 if (!m)
1597 {
1598 LogRel(("NAT: can't allocate new mbuf\n"));
1599 RTMemFree((void *)pkt);
1600 return;
1601 }
1602
1603 m->m_len = pkt_len ;
1604 memcpy(m->m_data, pkt, pkt_len);
1605 proto = ntohs(*(uint16_t *)(pkt + 12));
1606#endif
1607 /* Note: we add to align the IP header */
1608
1609 if (pData->port_forwarding_activated != pData->port_forwarding_count)
1610 activate_port_forwarding(pData, mtod(m, struct ethhdr *));
1611
1612 switch(proto)
1613 {
1614 case ETH_P_ARP:
1615 arp_input(pData, m);
1616 break;
1617
1618 case ETH_P_IP:
1619 /* Update time. Important if the network is very quiet, as otherwise
1620 * the first outgoing connection gets an incorrect timestamp. */
1621 updtime(pData);
1622 m_adj(m, ETH_HLEN);
1623#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1624 M_ASSERTPKTHDR(m);
1625 m->m_pkthdr.header = mtod(m, void *);
1626#endif
1627#if 1
1628 if ( pData->fmbuf_water_line
1629 && pData->fmbuf_water_warn_sent == 0
1630 && (curtime - pData->tsmbuf_water_warn_sent) > 500)
1631 {
1632 icmp_error(pData, m, ICMP_SOURCEQUENCH, 0, 0, "Out of resources!!!");
1633 pData->fmbuf_water_warn_sent = 1;
1634 pData->tsmbuf_water_warn_sent = curtime;
1635 }
1636#endif
1637 ip_input(pData, m);
1638 break;
1639
1640 case ETH_P_IPV6:
1641 m_free(pData, m);
1642 if (!fWarnedIpv6)
1643 {
1644 LogRel(("NAT: IPv6 not supported\n"));
1645 fWarnedIpv6 = true;
1646 }
1647 break;
1648
1649 default:
1650 Log(("NAT: Unsupported protocol %x\n", proto));
1651 m_free(pData, m);
1652 break;
1653 }
1654
1655#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1656 RTMemFree((void *)pkt);
1657#endif
1658}
1659
1660/* output the IP packet to the ethernet device */
1661void if_encap(PNATState pData, uint16_t eth_proto, struct mbuf *m, int flags)
1662{
1663 struct ethhdr *eh;
1664 uint8_t *buf = NULL;
1665 size_t mlen = 0;
1666 STAM_PROFILE_START(&pData->StatIF_encap, a);
1667
1668#ifndef VBOX_WITH_SLIRP_BSD_MBUF
1669 m->m_data -= if_maxlinkhdr;
1670 m->m_len += ETH_HLEN;
1671 eh = mtod(m, struct ethhdr *);
1672
1673 if (MBUF_HEAD(m) != m->m_data)
1674 {
1675 LogRel(("NAT: ethernet detects corruption of the packet"));
1676 AssertMsgFailed(("!!Ethernet frame corrupted!!"));
1677 }
1678#else
1679 M_ASSERTPKTHDR(m);
1680 m->m_data -= ETH_HLEN;
1681 m->m_len += ETH_HLEN;
1682 eh = mtod(m, struct ethhdr *);
1683#endif
1684
1685 if (memcmp(eh->h_source, special_ethaddr, ETH_ALEN) != 0)
1686 {
1687 memcpy(eh->h_dest, eh->h_source, ETH_ALEN);
1688 memcpy(eh->h_source, special_ethaddr, ETH_ALEN);
1689 Assert(memcmp(eh->h_dest, special_ethaddr, ETH_ALEN) != 0);
1690 if (memcmp(eh->h_dest, zerro_ethaddr, ETH_ALEN) == 0)
1691 {
1692 /* don't do anything */
1693 goto done;
1694 }
1695 }
1696#ifndef VBOX_WITH_SLIRP_BSD_MBUF
1697 mlen = m->m_len;
1698#else
1699 mlen = m_length(m, NULL);
1700 buf = RTMemAlloc(mlen);
1701 if (buf == NULL)
1702 {
1703 LogRel(("NAT: Can't alloc memory for outgoing buffer\n"));
1704 goto done;
1705 }
1706#endif
1707 eh->h_proto = htons(eth_proto);
1708#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1709 m_copydata(m, 0, mlen, (char *)buf);
1710#else
1711 if (flags & ETH_ENCAP_URG)
1712 slirp_urg_output(pData->pvUser, m, mtod(m, const uint8_t *), mlen);
1713 else
1714 slirp_output(pData->pvUser, m, mtod(m, const uint8_t *), mlen);
1715#endif
1716done:
1717 STAM_PROFILE_STOP(&pData->StatIF_encap, a);
1718#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1719 m_free(pData, m);
1720#endif
1721}
1722
1723/**
1724 * Still we're using dhcp server leasing to map ether to IP
1725 * @todo see rt_lookup_in_cache
1726 */
1727static uint32_t find_guest_ip(PNATState pData, const uint8_t *eth_addr)
1728{
1729 uint32_t ip = INADDR_ANY;
1730 int rc;
1731
1732 if (eth_addr == NULL)
1733 return INADDR_ANY;
1734
1735 if ( memcmp(eth_addr, zerro_ethaddr, ETH_ALEN) == 0
1736 || memcmp(eth_addr, broadcast_ethaddr, ETH_ALEN) == 0)
1737 return INADDR_ANY;
1738
1739 rc = slirp_arp_lookup_ip_by_ether(pData, eth_addr, &ip);
1740 if (RT_SUCCESS(rc))
1741 return ip;
1742
1743 bootp_cache_lookup_ip_by_ether(pData, eth_addr, &ip);
1744 /* ignore return code, ip will be set to INADDR_ANY on error */
1745 return ip;
1746}
1747
1748/**
1749 * We need check if we've activated port forwarding
1750 * for specific machine ... that of course relates to
1751 * service mode
1752 * @todo finish this for service case
1753 */
1754static void activate_port_forwarding(PNATState pData, struct ethhdr *ethdr)
1755{
1756 struct port_forward_rule *rule = NULL;
1757
1758 /* check mac here */
1759 LIST_FOREACH(rule, &pData->port_forward_rule_head, list)
1760 {
1761 struct socket *so;
1762 struct alias_link *link;
1763 struct libalias *lib;
1764 int flags;
1765 struct sockaddr sa;
1766 struct sockaddr_in *psin;
1767 socklen_t socketlen;
1768 struct in_addr alias;
1769 int rc;
1770 uint32_t guest_addr; /* need to understand if we already give address to guest */
1771
1772 if (rule->activated)
1773 continue; /*already activated */
1774#ifdef VBOX_WITH_NAT_SERVICE
1775 if (memcmp(rule->mac_address, ethdr->h_source, ETH_ALEN) != 0)
1776 continue; /*not right mac, @todo: it'd be better do the list port forwarding per mac */
1777 guest_addr = find_guest_ip(pData, ethdr->h_source);
1778#else
1779#if 0
1780 if (memcmp(client_ethaddr, ethdr->h_source, ETH_ALEN) != 0)
1781 continue;
1782#endif
1783 guest_addr = find_guest_ip(pData, ethdr->h_source);
1784#endif
1785 if (guest_addr == INADDR_ANY)
1786 {
1787 /* the address wasn't granted */
1788 return;
1789 }
1790#if !defined(VBOX_WITH_NAT_SERVICE)
1791 if (rule->guest_addr.s_addr != guest_addr)
1792 continue;
1793#endif
1794
1795 LogRel(("NAT: set redirect %s hp:%d gp:%d\n", (rule->proto == IPPROTO_UDP?"UDP":"TCP"),
1796 rule->host_port, rule->guest_port));
1797
1798 if (rule->proto == IPPROTO_UDP)
1799 {
1800 so = udp_listen(pData, rule->bind_ip.s_addr, htons(rule->host_port), guest_addr,
1801 htons(rule->guest_port), 0);
1802 pData->port_forwarding_activated++;
1803 }
1804 else
1805 {
1806 so = solisten(pData, rule->bind_ip.s_addr, htons(rule->host_port), guest_addr,
1807 htons(rule->guest_port), 0);
1808 pData->port_forwarding_activated++;
1809 }
1810
1811 if (so == NULL)
1812 {
1813 LogRel(("NAT: failed redirect %s hp:%d gp:%d\n", (rule->proto == IPPROTO_UDP?"UDP":"TCP"),
1814 rule->host_port, rule->guest_port));
1815 goto remove_port_forwarding;
1816 }
1817
1818 psin = (struct sockaddr_in *)&sa;
1819 psin->sin_family = AF_INET;
1820 psin->sin_port = 0;
1821 psin->sin_addr.s_addr = INADDR_ANY;
1822 socketlen = sizeof(struct sockaddr);
1823
1824 rc = getsockname(so->s, &sa, &socketlen);
1825 if (rc < 0 || sa.sa_family != AF_INET)
1826 {
1827 LogRel(("NAT: failed redirect %s hp:%d gp:%d\n", (rule->proto == IPPROTO_UDP?"UDP":"TCP"),
1828 rule->host_port, rule->guest_port));
1829 goto remove_port_forwarding;
1830 }
1831
1832 psin = (struct sockaddr_in *)&sa;
1833
1834 lib = LibAliasInit(pData, NULL);
1835 flags = LibAliasSetMode(lib, 0, 0);
1836 flags |= PKT_ALIAS_LOG; /* set logging */
1837 flags |= PKT_ALIAS_REVERSE; /* set logging */
1838 flags = LibAliasSetMode(lib, flags, ~0);
1839
1840 alias.s_addr = htonl(ntohl(guest_addr) | CTL_ALIAS);
1841 link = LibAliasRedirectPort(lib, psin->sin_addr, htons(rule->host_port),
1842 alias, htons(rule->guest_port),
1843 pData->special_addr, -1, /* not very clear for now */
1844 rule->proto);
1845 if (!link)
1846 {
1847 LogRel(("NAT: failed redirect %s hp:%d gp:%d\n", (rule->proto == IPPROTO_UDP?"UDP":"TCP"),
1848 rule->host_port, rule->guest_port));
1849 goto remove_port_forwarding;
1850 }
1851
1852 so->so_la = lib;
1853 rule->activated = 1;
1854 continue;
1855
1856 remove_port_forwarding:
1857 LIST_REMOVE(rule, list);
1858 pData->port_forwarding_count--;
1859 RTMemFree(rule);
1860 }
1861}
1862
1863/**
1864 * Changes in 3.1 instead of opening new socket do the following:
1865 * gain more information:
1866 * 1. bind IP
1867 * 2. host port
1868 * 3. guest port
1869 * 4. proto
1870 * 5. guest MAC address
1871 * the guest's MAC address is rather important for service, but we easily
1872 * could get it from VM configuration in DrvNAT or Service, the idea is activating
1873 * corresponding port-forwarding
1874 */
1875int slirp_redir(PNATState pData, int is_udp, struct in_addr host_addr, int host_port,
1876 struct in_addr guest_addr, int guest_port, const uint8_t *ethaddr)
1877{
1878 struct port_forward_rule *rule = NULL;
1879 Assert(memcmp(ethaddr, zerro_ethaddr, ETH_ALEN) == 0);
1880 rule = RTMemAllocZ(sizeof(struct port_forward_rule));
1881 if (rule == NULL)
1882 return 1;
1883 rule->proto = (is_udp ? IPPROTO_UDP : IPPROTO_TCP);
1884 rule->host_port = host_port;
1885 rule->guest_port = guest_port;
1886#ifndef VBOX_WITH_NAT_SERVICE
1887 rule->guest_addr.s_addr = guest_addr.s_addr;
1888#endif
1889 rule->bind_ip.s_addr = host_addr.s_addr;
1890 memcpy(rule->mac_address, ethaddr, ETH_ALEN);
1891 /* @todo add mac address */
1892 LIST_INSERT_HEAD(&pData->port_forward_rule_head, rule, list);
1893 pData->port_forwarding_count++;
1894 return 0;
1895}
1896
1897int slirp_add_exec(PNATState pData, int do_pty, const char *args, int addr_low_byte,
1898 int guest_port)
1899{
1900 return add_exec(&exec_list, do_pty, (char *)args,
1901 addr_low_byte, htons(guest_port));
1902}
1903
1904void slirp_set_ethaddr(PNATState pData, const uint8_t *ethaddr)
1905{
1906#ifndef VBOX_WITH_NAT_SERVICE
1907 memcpy(client_ethaddr, ethaddr, ETH_ALEN);
1908#endif
1909}
1910
1911#if defined(RT_OS_WINDOWS)
1912HANDLE *slirp_get_events(PNATState pData)
1913{
1914 return pData->phEvents;
1915}
1916void slirp_register_external_event(PNATState pData, HANDLE hEvent, int index)
1917{
1918 pData->phEvents[index] = hEvent;
1919}
1920#endif
1921
1922unsigned int slirp_get_timeout_ms(PNATState pData)
1923{
1924 if (link_up)
1925 {
1926 if (time_fasttimo)
1927 return 2;
1928 if (do_slowtimo)
1929 return 500; /* see PR_SLOWHZ */
1930 }
1931 return 0;
1932}
1933
1934#ifndef RT_OS_WINDOWS
1935int slirp_get_nsock(PNATState pData)
1936{
1937 return pData->nsock;
1938}
1939#endif
1940
1941/*
1942 * this function called from NAT thread
1943 */
1944void slirp_post_sent(PNATState pData, void *pvArg)
1945{
1946 struct socket *so = 0;
1947 struct tcpcb *tp = 0;
1948 struct mbuf *m = (struct mbuf *)pvArg;
1949 m_free(pData, m);
1950}
1951#ifdef VBOX_WITH_SLIRP_MT
1952void slirp_process_queue(PNATState pData)
1953{
1954 RTReqProcess(pData->pReqQueue, RT_INDEFINITE_WAIT);
1955}
1956void *slirp_get_queue(PNATState pData)
1957{
1958 return pData->pReqQueue;
1959}
1960#endif
1961
1962void slirp_set_dhcp_TFTP_prefix(PNATState pData, const char *tftpPrefix)
1963{
1964 Log2(("tftp_prefix:%s\n", tftpPrefix));
1965 tftp_prefix = tftpPrefix;
1966}
1967
1968void slirp_set_dhcp_TFTP_bootfile(PNATState pData, const char *bootFile)
1969{
1970 Log2(("bootFile:%s\n", bootFile));
1971 bootp_filename = bootFile;
1972}
1973
1974void slirp_set_dhcp_next_server(PNATState pData, const char *next_server)
1975{
1976 Log2(("next_server:%s\n", next_server));
1977 if (next_server == NULL)
1978 pData->tftp_server.s_addr = htonl(ntohl(pData->special_addr.s_addr) | CTL_TFTP);
1979 else
1980 inet_aton(next_server, &pData->tftp_server);
1981}
1982
1983int slirp_set_binding_address(PNATState pData, char *addr)
1984{
1985 if (addr == NULL || (inet_aton(addr, &pData->bindIP) == 0))
1986 {
1987 pData->bindIP.s_addr = INADDR_ANY;
1988 return 1;
1989 }
1990 return 0;
1991}
1992
1993void slirp_set_dhcp_dns_proxy(PNATState pData, bool fDNSProxy)
1994{
1995 if (!pData->use_host_resolver)
1996 {
1997 Log2(("NAT: DNS proxy switched %s\n", (fDNSProxy ? "on" : "off")));
1998 pData->use_dns_proxy = fDNSProxy;
1999 }
2000 else
2001 {
2002 LogRel(("NAT: Host Resolver conflicts with DNS proxy, the last one was forcely ignored\n"));
2003 }
2004}
2005
2006#define CHECK_ARG(name, val, lim_min, lim_max) \
2007 do { \
2008 if ((val) < (lim_min) || (val) > (lim_max)) \
2009 { \
2010 LogRel(("NAT: (" #name ":%d) has been ignored, " \
2011 "because out of range (%d, %d)\n", (val), (lim_min), (lim_max))); \
2012 return; \
2013 } \
2014 else \
2015 { \
2016 LogRel(("NAT: (" #name ":%d)\n", (val))); \
2017 } \
2018 } while (0)
2019
2020/* don't allow user set less 8kB and more than 1M values */
2021#define _8K_1M_CHECK_ARG(name, val) CHECK_ARG(name, (val), 8, 1024)
2022void slirp_set_rcvbuf(PNATState pData, int kilobytes)
2023{
2024 _8K_1M_CHECK_ARG("SOCKET_RCVBUF", kilobytes);
2025 pData->socket_rcv = kilobytes;
2026}
2027void slirp_set_sndbuf(PNATState pData, int kilobytes)
2028{
2029 _8K_1M_CHECK_ARG("SOCKET_SNDBUF", kilobytes);
2030 pData->socket_snd = kilobytes * _1K;
2031}
2032void slirp_set_tcp_rcvspace(PNATState pData, int kilobytes)
2033{
2034 _8K_1M_CHECK_ARG("TCP_RCVSPACE", kilobytes);
2035 tcp_rcvspace = kilobytes * _1K;
2036}
2037void slirp_set_tcp_sndspace(PNATState pData, int kilobytes)
2038{
2039 _8K_1M_CHECK_ARG("TCP_SNDSPACE", kilobytes);
2040 tcp_sndspace = kilobytes * _1K;
2041}
2042
2043/*
2044 * Looking for Ether by ip in ARP-cache
2045 * Note: it´s responsible of caller to allocate buffer for result
2046 * @returns iprt status code
2047 */
2048int slirp_arp_lookup_ether_by_ip(PNATState pData, uint32_t ip, uint8_t *ether)
2049{
2050 struct arp_cache_entry *ac = NULL;
2051
2052 if (ether == NULL)
2053 return VERR_INVALID_PARAMETER;
2054
2055 if (LIST_EMPTY(&pData->arp_cache))
2056 return VERR_NOT_FOUND;
2057
2058 LIST_FOREACH(ac, &pData->arp_cache, list)
2059 {
2060 if (ac->ip == ip)
2061 {
2062 memcpy(ether, ac->ether, ETH_ALEN);
2063 return VINF_SUCCESS;
2064 }
2065 }
2066 return VERR_NOT_FOUND;
2067}
2068
2069/*
2070 * Looking for IP by Ether in ARP-cache
2071 * Note: it´s responsible of caller to allocate buffer for result
2072 * @returns 0 - if found, 1 - otherwise
2073 */
2074int slirp_arp_lookup_ip_by_ether(PNATState pData, const uint8_t *ether, uint32_t *ip)
2075{
2076 struct arp_cache_entry *ac = NULL;
2077 *ip = INADDR_ANY;
2078
2079 if (LIST_EMPTY(&pData->arp_cache))
2080 return VERR_NOT_FOUND;
2081
2082 LIST_FOREACH(ac, &pData->arp_cache, list)
2083 {
2084 if (memcmp(ether, ac->ether, ETH_ALEN) == 0)
2085 {
2086 *ip = ac->ip;
2087 return VINF_SUCCESS;
2088 }
2089 }
2090 return VERR_NOT_FOUND;
2091}
2092
2093void slirp_arp_who_has(PNATState pData, uint32_t dst)
2094{
2095 struct mbuf *m;
2096 struct ethhdr *ehdr;
2097 struct arphdr *ahdr;
2098
2099#ifndef VBOX_WITH_SLIRP_BSD_MBUF
2100 m = m_get(pData);
2101#else
2102 m = m_getcl(pData, M_NOWAIT, MT_HEADER, M_PKTHDR);
2103#endif
2104 if (m == NULL)
2105 {
2106 LogRel(("NAT: Can't alloc mbuf for ARP request\n"));
2107 return;
2108 }
2109 ehdr = mtod(m, struct ethhdr *);
2110 memset(ehdr->h_source, 0xff, ETH_ALEN);
2111 ahdr = (struct arphdr *)&ehdr[1];
2112 ahdr->ar_hrd = htons(1);
2113 ahdr->ar_pro = htons(ETH_P_IP);
2114 ahdr->ar_hln = ETH_ALEN;
2115 ahdr->ar_pln = 4;
2116 ahdr->ar_op = htons(ARPOP_REQUEST);
2117 memcpy(ahdr->ar_sha, special_ethaddr, ETH_ALEN);
2118 *(uint32_t *)ahdr->ar_sip = htonl(ntohl(pData->special_addr.s_addr) | CTL_ALIAS);
2119 memset(ahdr->ar_tha, 0xff, ETH_ALEN); /*broadcast*/
2120 *(uint32_t *)ahdr->ar_tip = dst;
2121#ifndef VBOX_WITH_SLIRP_BSD_MBUF
2122 m->m_data += if_maxlinkhdr;
2123 m->m_len = sizeof(struct arphdr);
2124#else
2125 /* warn!!! should falls in mbuf minimal size */
2126 m->m_len = sizeof(struct arphdr) + ETH_HLEN;
2127#endif
2128 if_encap(pData, ETH_P_ARP, m, ETH_ENCAP_URG);
2129}
2130
2131/* updates the arp cache
2132 * @returns 0 - if has found and updated
2133 * 1 - if hasn't found.
2134 */
2135int slirp_arp_cache_update(PNATState pData, uint32_t dst, const uint8_t *mac)
2136{
2137 struct arp_cache_entry *ac;
2138 LIST_FOREACH(ac, &pData->arp_cache, list)
2139 {
2140 if (memcmp(ac->ether, mac, ETH_ALEN) == 0)
2141 {
2142 ac->ip = dst;
2143 return 0;
2144 }
2145 }
2146 return 1;
2147}
2148
2149void slirp_arp_cache_add(PNATState pData, uint32_t ip, const uint8_t *ether)
2150{
2151 struct arp_cache_entry *ac = NULL;
2152 ac = RTMemAllocZ(sizeof(struct arp_cache_entry));
2153 if (ac == NULL)
2154 {
2155 LogRel(("NAT: Can't allocate arp cache entry\n"));
2156 return;
2157 }
2158 ac->ip = ip;
2159 memcpy(ac->ether, ether, ETH_ALEN);
2160 LIST_INSERT_HEAD(&pData->arp_cache, ac, list);
2161}
2162
2163#ifdef VBOX_WITH_SLIRP_BSD_MBUF
2164void slirp_set_mtu(PNATState pData, int mtu)
2165{
2166 if (mtu < 20 || mtu >= 16000)
2167 {
2168 LogRel(("NAT: mtu(%d) is out of range (20;16000] mtu forcely assigned to 1500\n", mtu));
2169 mtu = 1500;
2170 }
2171 if_mtu =
2172 if_mru = mtu;
2173}
2174#endif
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