VirtualBox

source: vbox/trunk/src/VBox/Devices/Network/slirp/slirp.c@ 22013

最後變更 在這個檔案從22013是 22013,由 vboxsync 提交於 16 年 前

NAT: clearing (removing non-libalias code)
  • 屬性 svn:eol-style 設為 native
檔案大小: 54.2 KB
行 
1#include "slirp.h"
2#ifdef RT_OS_OS2
3# include <paths.h>
4#endif
5
6#include <VBox/err.h>
7#include <VBox/pdmdrv.h>
8#include <iprt/assert.h>
9#ifndef RT_OS_WINDOWS
10# include <sys/ioctl.h>
11# include <poll.h>
12#else
13# include <Winnls.h>
14# define _WINSOCK2API_
15# include <IPHlpApi.h>
16#endif
17#include <alias.h>
18
19#if !defined(RT_OS_WINDOWS)
20
21# define DO_ENGAGE_EVENT1(so, fdset, label) \
22 do { \
23 if( so->so_poll_index != -1 \
24 && so->s == polls[so->so_poll_index].fd) { \
25 polls[so->so_poll_index].events |= N_(fdset ## _poll); \
26 break; /* out of this loop */ \
27 } \
28 AssertRelease(poll_index < (nfds)); \
29 AssertRelease(poll_index >= 0 && poll_index < (nfds)); \
30 polls[poll_index].fd = (so)->s; \
31 (so)->so_poll_index = poll_index; \
32 polls[poll_index].events = N_(fdset ## _poll); \
33 polls[poll_index].revents = 0; \
34 poll_index++; \
35 } while(0)
36
37
38# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
39 do { \
40 if( so->so_poll_index != -1 \
41 && so->s == polls[so->so_poll_index].fd) { \
42 polls[so->so_poll_index].events |= \
43 N_(fdset1 ## _poll) | N_(fdset1 ## _poll); \
44 break; /* out of this loop */ \
45 } \
46 AssertRelease(poll_index < (nfds)); \
47 polls[poll_index].fd = (so)->s; \
48 (so)->so_poll_index = poll_index; \
49 polls[poll_index].events = \
50 N_(fdset1 ## _poll) | N_(fdset1 ## _poll); \
51 poll_index++; \
52 } while(0)
53
54# define DO_POLL_EVENTS(rc, error, so, events, label) do {} while (0)
55
56# define DO_CHECK_FD_SET(so, events, fdset) ( ((so)->so_poll_index != -1) \
57 && ((so)->so_poll_index <= ndfs) \
58 && ((so)->s == polls[so->so_poll_index].fd) \
59 && (polls[(so)->so_poll_index].revents & N_(fdset ## _poll)))
60# define DO_UNIX_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset) /*specific for Unix API */
61# define DO_WIN_CHECK_FD_SET(so, events, fdset ) 0 /* specific for Windows Winsock API */
62
63# ifndef RT_OS_WINDOWS
64
65# ifndef RT_OS_LINUX
66# define readfds_poll (POLLRDNORM)
67# define writefds_poll (POLLWRNORM)
68# define xfds_poll (POLLRDBAND|POLLWRBAND|POLLPRI)
69# else
70# define readfds_poll (POLLIN)
71# define writefds_poll (POLLOUT)
72# define xfds_poll (POLLPRI)
73# endif
74# define rderr_poll (POLLERR)
75# define rdhup_poll (POLLHUP)
76# define nval_poll (POLLNVAL)
77
78# define ICMP_ENGAGE_EVENT(so, fdset) \
79 do { \
80 if (pData->icmp_socket.s != -1) \
81 DO_ENGAGE_EVENT1((so), fdset, ICMP); \
82 } while (0)
83# else /* !RT_OS_WINDOWS */
84# define DO_WIN_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset)
85# define ICMP_ENGAGE_EVENT(so, fdset) do {} while(0)
86#endif /* RT_OS_WINDOWS */
87
88#else /* defined(RT_OS_WINDOWS) */
89
90/*
91 * On Windows, we will be notified by IcmpSendEcho2() when the response arrives.
92 * So no call to WSAEventSelect necessary.
93 */
94# define ICMP_ENGAGE_EVENT(so, fdset) do {} while(0)
95
96# define DO_ENGAGE_EVENT1(so, fdset1, label) \
97 do { \
98 rc = WSAEventSelect((so)->s, VBOX_SOCKET_EVENT, FD_ALL_EVENTS); \
99 if (rc == SOCKET_ERROR) \
100 { \
101 /* This should not happen */ \
102 error = WSAGetLastError(); \
103 LogRel(("WSAEventSelect (" #label ") error %d (so=%x, socket=%s, event=%x)\n", \
104 error, (so), (so)->s, VBOX_SOCKET_EVENT)); \
105 } \
106 } while(0); \
107 CONTINUE(label)
108
109# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
110 DO_ENGAGE_EVENT1((so), (fdset1), label)
111
112# define DO_POLL_EVENTS(rc, error, so, events, label) \
113 (rc) = WSAEnumNetworkEvents((so)->s, VBOX_SOCKET_EVENT, (events)); \
114 if ((rc) == SOCKET_ERROR) \
115 { \
116 (error) = WSAGetLastError(); \
117 LogRel(("WSAEnumNetworkEvents " #label " error %d\n", (error))); \
118 CONTINUE(label); \
119 }
120
121# define acceptds_win FD_ACCEPT
122# define acceptds_win_bit FD_ACCEPT_BIT
123
124# define readfds_win FD_READ
125# define readfds_win_bit FD_READ_BIT
126
127# define writefds_win FD_WRITE
128# define writefds_win_bit FD_WRITE_BIT
129
130# define xfds_win FD_OOB
131# define xfds_win_bit FD_OOB_BIT
132
133# define DO_CHECK_FD_SET(so, events, fdset) \
134 (((events).lNetworkEvents & fdset ## _win) && ((events).iErrorCode[fdset ## _win_bit] == 0))
135
136# define DO_WIN_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset)
137# define DO_UNIX_CHECK_FD_SET(so, events, fdset ) 1 /*specific for Unix API */
138
139#endif /* defined(RT_OS_WINDOWS) */
140
141#define TCP_ENGAGE_EVENT1(so, fdset) \
142 DO_ENGAGE_EVENT1((so), fdset, tcp)
143
144#define TCP_ENGAGE_EVENT2(so, fdset1, fdset2) \
145 DO_ENGAGE_EVENT2((so), fdset1, fdset2, tcp)
146
147#define UDP_ENGAGE_EVENT(so, fdset) \
148 DO_ENGAGE_EVENT1((so), fdset, udp)
149
150#define POLL_TCP_EVENTS(rc, error, so, events) \
151 DO_POLL_EVENTS((rc), (error), (so), (events), tcp)
152
153#define POLL_UDP_EVENTS(rc, error, so, events) \
154 DO_POLL_EVENTS((rc), (error), (so), (events), udp)
155
156#define CHECK_FD_SET(so, events, set) \
157 (DO_CHECK_FD_SET((so), (events), set))
158
159#define WIN_CHECK_FD_SET(so, events, set) \
160 (DO_WIN_CHECK_FD_SET((so), (events), set))
161#define UNIX_CHECK_FD_SET(so, events, set) \
162 (DO_UNIX_CHECK_FD_SET(so, events, set))
163
164/*
165 * Loging macros
166 */
167#if VBOX_WITH_DEBUG_NAT_SOCKETS
168# if defined(RT_OS_WINDOWS)
169# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
170 do { \
171 LogRel((" " #proto " %R[natsock] %R[natwinnetevents]\n", (so), (winevent))); \
172 } while (0)
173# else /* 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] %s %s %s er: %s, %s, %s\n", (so), \
177 CHECK_FD_SET(so, ign ,r_fdset) ? "READ":"", \
178 CHECK_FD_SET(so, ign, w_fdset) ? "WRITE":"", \
179 CHECK_FD_SET(so, ign, x_fdset) ? "OOB":"", \
180 CHECK_FD_SET(so, ign, rderr) ? "RDERR":"", \
181 CHECK_FD_SET(so, ign, rdhup) ? "RDHUP":"", \
182 CHECK_FD_SET(so, ign, nval) ? "RDNVAL":"")); \
183 } while (0)
184# endif /* !RT_OS_WINDOWS */
185#else /* VBOX_WITH_DEBUG_NAT_SOCKETS */
186# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) do {} while (0)
187#endif /* !VBOX_WITH_DEBUG_NAT_SOCKETS */
188
189#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)
190
191static const uint8_t special_ethaddr[6] =
192{
193 0x52, 0x54, 0x00, 0x12, 0x35, 0x00
194};
195
196static const uint8_t broadcast_ethaddr[6] =
197{
198 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
199};
200
201const uint8_t zerro_ethaddr[6] =
202{
203 0x0, 0x0, 0x0, 0x0, 0x0, 0x0
204};
205
206#ifdef RT_OS_WINDOWS
207static int get_dns_addr_domain(PNATState pData, bool fVerbose,
208 struct in_addr *pdns_addr,
209 const char **ppszDomain)
210{
211 /* Get amount of memory required for operation */
212 ULONG flags = GAA_FLAG_INCLUDE_PREFIX; /*GAA_FLAG_INCLUDE_ALL_INTERFACES;*/ /* all interfaces registered in NDIS */
213 PIP_ADAPTER_ADDRESSES addresses = NULL;
214 PIP_ADAPTER_ADDRESSES addr = NULL;
215 PIP_ADAPTER_DNS_SERVER_ADDRESS dns = NULL;
216 ULONG size = 0;
217 int wlen = 0;
218 char *suffix;
219 struct dns_entry *da = NULL;
220 struct dns_domain_entry *dd = NULL;
221 ULONG ret = ERROR_SUCCESS;
222
223 /* @todo add SKIPing flags to get only required information */
224
225 ret = pData->pfGetAdaptersAddresses(AF_INET, 0, NULL /* reserved */, addresses, &size);
226 if (ret != ERROR_BUFFER_OVERFLOW)
227 {
228 LogRel(("NAT: error %lu occurred on capacity detection operation\n", ret));
229 return -1;
230 }
231
232 if (size == 0)
233 {
234 LogRel(("NAT: Win socket API returns non capacity\n"));
235 return -1;
236 }
237
238 addresses = RTMemAllocZ(size);
239 if (addresses == NULL)
240 {
241 LogRel(("NAT: No memory available \n"));
242 return -1;
243 }
244
245 ret = pData->pfGetAdaptersAddresses(AF_INET, 0, NULL /* reserved */, addresses, &size);
246 if (ret != ERROR_SUCCESS)
247 {
248 LogRel(("NAT: error %lu occurred on fetching adapters info\n", ret));
249 RTMemFree(addresses);
250 return -1;
251 }
252 addr = addresses;
253 while(addr != NULL)
254 {
255 int found;
256 if (addr->OperStatus != IfOperStatusUp)
257 goto next;
258 dns = addr->FirstDnsServerAddress;
259 while (dns != NULL)
260 {
261 struct sockaddr *saddr = dns->Address.lpSockaddr;
262 if (saddr->sa_family != AF_INET)
263 goto next_dns;
264 /* add dns server to list */
265 da = RTMemAllocZ(sizeof(struct dns_entry));
266 if (da == NULL)
267 {
268 LogRel(("NAT: Can't allocate buffer for DNS entry\n"));
269 RTMemFree(addresses);
270 return VERR_NO_MEMORY;
271 }
272 LogRel(("NAT: adding %R[IP4] to DNS server list\n", &((struct sockaddr_in *)saddr)->sin_addr));
273 if ((((struct sockaddr_in *)saddr)->sin_addr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET)) {
274 da->de_addr.s_addr = htonl(ntohl(special_addr.s_addr) | CTL_ALIAS);
275 }
276 else
277 {
278 da->de_addr.s_addr = ((struct sockaddr_in *)saddr)->sin_addr.s_addr;
279 }
280 TAILQ_INSERT_HEAD(&pData->dns_list_head, da, de_list);
281
282 if (addr->DnsSuffix == NULL)
283 goto next_dns;
284
285 /*uniq*/
286 RTUtf16ToUtf8(addr->DnsSuffix, &suffix);
287
288 if (!suffix || strlen(suffix) == 0) {
289 RTStrFree(suffix);
290 goto next_dns;
291 }
292
293 found = 0;
294 LIST_FOREACH(dd, &pData->dns_domain_list_head, dd_list)
295 {
296 if ( dd->dd_pszDomain != NULL
297 && strcmp(dd->dd_pszDomain, suffix) == 0)
298 {
299 found = 1;
300 RTStrFree(suffix);
301 break;
302 }
303 }
304 if (found == 0)
305 {
306 dd = RTMemAllocZ(sizeof(struct dns_domain_entry));
307 if (dd == NULL)
308 {
309 LogRel(("NAT: not enough memory\n"));
310 RTStrFree(suffix);
311 RTMemFree(addresses);
312 return VERR_NO_MEMORY;
313 }
314 dd->dd_pszDomain = suffix;
315 LogRel(("NAT: adding domain name %s to search list\n", dd->dd_pszDomain));
316 LIST_INSERT_HEAD(&pData->dns_domain_list_head, dd, dd_list);
317 }
318 next_dns:
319 dns = dns->Next;
320 }
321 next:
322 addr = addr->Next;
323 }
324 RTMemFree(addresses);
325 return 0;
326}
327
328#else /* !RT_OS_WINDOWS */
329
330static int get_dns_addr_domain(PNATState pData, bool fVerbose,
331 struct in_addr *pdns_addr,
332 const char **ppszDomain)
333{
334 char buff[512];
335 char buff2[256];
336 FILE *f = NULL;
337 int found = 0;
338 struct in_addr tmp_addr;
339
340#ifdef RT_OS_OS2
341 /* Try various locations. */
342 char *etc = getenv("ETC");
343 if (etc)
344 {
345 snprintf(buff, sizeof(buff), "%s/RESOLV2", etc);
346 f = fopen(buff, "rt");
347 }
348 if (!f)
349 {
350 snprintf(buff, sizeof(buff), "%s/RESOLV2", _PATH_ETC);
351 f = fopen(buff, "rt");
352 }
353 if (!f)
354 {
355 snprintf(buff, sizeof(buff), "%s/resolv.conf", _PATH_ETC);
356 f = fopen(buff, "rt");
357 }
358#else
359#ifndef DEBUG_vvl
360 f = fopen("/etc/resolv.conf", "r");
361#else
362 char *home = getenv("HOME");
363 snprintf(buff, sizeof(buff), "%s/resolv.conf", home);
364 f = fopen(buff, "r");
365 if (f != NULL)
366 {
367 Log(("NAT: DNS we're using %s\n", buff));
368 }
369 else
370 {
371 f = fopen("/etc/resolv.conf", "r");
372 Log(("NAT: DNS we're using %s\n", buff));
373 }
374#endif
375#endif
376 if (!f)
377 return -1;
378
379 if (ppszDomain)
380 *ppszDomain = NULL;
381 Log(("nat: DNS Servers:\n"));
382 while (fgets(buff, 512, f) != NULL)
383 {
384 struct dns_entry *da = NULL;
385 if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1)
386 {
387 if (!inet_aton(buff2, &tmp_addr))
388 continue;
389 /*localhost mask */
390 da = RTMemAllocZ(sizeof (struct dns_entry));
391 if (da == NULL)
392 {
393 LogRel(("can't alloc memory for DNS entry\n"));
394 return -1;
395 }
396 /*check */
397 da->de_addr.s_addr = tmp_addr.s_addr;
398 if ((da->de_addr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET)) {
399 da->de_addr.s_addr = htonl(ntohl(special_addr.s_addr) | CTL_ALIAS);
400 }
401 TAILQ_INSERT_HEAD(&pData->dns_list_head, da, de_list);
402 found++;
403 }
404 if ((!strncmp(buff, "domain", 6) || !strncmp(buff, "search", 6)))
405 {
406 char *tok;
407 char *saveptr;
408 struct dns_domain_entry *dd = NULL;
409 int found = 0;
410 tok = strtok_r(&buff[6], " \t\n", &saveptr);
411 LIST_FOREACH(dd, &pData->dns_domain_list_head, dd_list)
412 {
413 if( tok != NULL
414 && strcmp(tok, dd->dd_pszDomain) == 0)
415 {
416 found = 1;
417 break;
418 }
419 }
420 if (tok != NULL && found == 0) {
421 dd = RTMemAllocZ(sizeof(struct dns_domain_entry));
422 if (dd == NULL)
423 {
424 LogRel(("NAT: not enought memory to add domain list\n"));
425 return VERR_NO_MEMORY;
426 }
427 dd->dd_pszDomain = RTStrDup(tok);
428 LogRel(("NAT: adding domain name %s to search list\n", dd->dd_pszDomain));
429 LIST_INSERT_HEAD(&pData->dns_domain_list_head, dd, dd_list);
430 }
431 }
432 }
433 fclose(f);
434 if (!found)
435 return -1;
436 return 0;
437}
438
439#endif
440
441static int slirp_init_dns_list(PNATState pData)
442{
443 TAILQ_INIT(&pData->dns_list_head);
444 LIST_INIT(&pData->dns_domain_list_head);
445 return get_dns_addr_domain(pData, true, NULL, NULL);
446}
447
448static void slirp_release_dns_list(PNATState pData)
449{
450 struct dns_entry *de = NULL;
451 struct dns_domain_entry *dd = NULL;
452 while(!TAILQ_EMPTY(&pData->dns_list_head)) {
453 de = TAILQ_FIRST(&pData->dns_list_head);
454 TAILQ_REMOVE(&pData->dns_list_head, de, de_list);
455 RTMemFree(de);
456 }
457 while(!LIST_EMPTY(&pData->dns_domain_list_head)) {
458 dd = LIST_FIRST(&pData->dns_domain_list_head);
459 LIST_REMOVE(dd, dd_list);
460 if (dd->dd_pszDomain != NULL)
461 RTStrFree(dd->dd_pszDomain);
462 RTMemFree(dd);
463 }
464}
465
466int get_dns_addr(PNATState pData, struct in_addr *pdns_addr)
467{
468 return get_dns_addr_domain(pData, false, pdns_addr, NULL);
469}
470
471#ifndef VBOX_WITH_NAT_SERVICE
472int slirp_init(PNATState *ppData, const char *pszNetAddr, uint32_t u32Netmask,
473 bool fPassDomain, void *pvUser)
474#else
475int slirp_init(PNATState *ppData, uint32_t u32NetAddr, uint32_t u32Netmask,
476 bool fPassDomain, void *pvUser)
477#endif
478{
479 int fNATfailed = 0;
480 int rc;
481 PNATState pData = RTMemAllocZ(sizeof(NATState));
482 *ppData = pData;
483 if (!pData)
484 return VERR_NO_MEMORY;
485 if (u32Netmask & 0x1f)
486 /* CTL is x.x.x.15, bootp passes up to 16 IPs (15..31) */
487 return VERR_INVALID_PARAMETER;
488 pData->fPassDomain = fPassDomain;
489 pData->pvUser = pvUser;
490 pData->netmask = u32Netmask;
491
492 /* sockets & TCP defaults */
493 pData->socket_rcv = 64 * _1K;
494 pData->socket_snd = 64 * _1K;
495 tcp_sndspace = 64 * _1K;
496 tcp_rcvspace = 64 * _1K;
497
498#ifdef RT_OS_WINDOWS
499 {
500 WSADATA Data;
501 WSAStartup(MAKEWORD(2, 0), &Data);
502 }
503 pData->phEvents[VBOX_SOCKET_EVENT_INDEX] = CreateEvent(NULL, FALSE, FALSE, NULL);
504#endif
505#ifdef VBOX_WITH_SLIRP_MT
506 QSOCKET_LOCK_CREATE(tcb);
507 QSOCKET_LOCK_CREATE(udb);
508 rc = RTReqCreateQueue(&pData->pReqQueue);
509 AssertReleaseRC(rc);
510#endif
511
512 link_up = 1;
513
514 debug_init();
515 if_init(pData);
516 ip_init(pData);
517 icmp_init(pData);
518
519 /* Initialise mbufs *after* setting the MTU */
520 m_init(pData);
521
522#ifndef VBOX_WITH_NAT_SERVICE
523 inet_aton(pszNetAddr, &special_addr);
524#else
525 special_addr.s_addr = u32NetAddr;
526#endif
527#ifdef VBOX_WITHOUT_SLIRP_CLIENT_ETHER
528 pData->slirp_ethaddr = &special_ethaddr[0];
529#endif
530 alias_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS);
531 /* @todo: add ability to configure this staff */
532
533 /* set default addresses */
534 inet_aton("127.0.0.1", &loopback_addr);
535 if (slirp_init_dns_list(pData) < 0)
536 fNATfailed = 1;
537
538 dnsproxy_init(pData);
539
540 getouraddr(pData);
541 {
542 int flags = 0;
543 struct in_addr proxy_addr;
544 pData->proxy_alias = LibAliasInit(pData, NULL);
545 if (pData->proxy_alias == NULL)
546 {
547 LogRel(("NAT: LibAlias default rule wasn't initialized\n"));
548 AssertMsgFailed(("NAT: LibAlias default rule wasn't initialized\n"));
549 }
550 flags = LibAliasSetMode(pData->proxy_alias, 0, 0);
551 flags |= PKT_ALIAS_LOG; /* set logging */
552 flags = LibAliasSetMode(pData->proxy_alias, flags, ~0);
553 proxy_addr.s_addr = htonl(ntohl(special_addr.s_addr) | CTL_ALIAS);
554 LibAliasSetAddress(pData->proxy_alias, proxy_addr);
555 ftp_alias_load(pData);
556 nbt_alias_load(pData);
557 }
558 return fNATfailed ? VINF_NAT_DNS : VINF_SUCCESS;
559}
560
561/**
562 * Register statistics.
563 */
564void slirp_register_statistics(PNATState pData, PPDMDRVINS pDrvIns)
565{
566#ifdef VBOX_WITH_STATISTICS
567# define COUNTER(name, type, units, dsc) \
568 do { \
569 PDMDrvHlpSTAMRegisterF(pDrvIns, \
570 &pData->Stat ## name, \
571 type, \
572 STAMVISIBILITY_ALWAYS, \
573 units, \
574 dsc, \
575 "/Drivers/NAT%u/" #name, \
576 pDrvIns->iInstance); \
577 } while (0)
578
579# define PROFILE_COUNTER(name, dsc) COUNTER(name, STAMTYPE_PROFILE, STAMUNIT_TICKS_PER_CALL, dsc)
580# define COUNTING_COUNTER(name, dsc) COUNTER(name, STAMTYPE_COUNTER, STAMUNIT_COUNT, dsc)
581
582# include "counters.h"
583
584# undef COUNTER
585# undef PROFILE_COUNTER
586# undef COUNTING_COUNTER
587/** @todo register statistics for the variables dumped by:
588 * ipstats(pData); tcpstats(pData); udpstats(pData); icmpstats(pData);
589 * mbufstats(pData); sockstats(pData); */
590#endif /* VBOX_WITH_STATISTICS */
591}
592
593/**
594 * Deregister statistics.
595 */
596void slirp_deregister_statistics(PNATState pData, PPDMDRVINS pDrvIns)
597{
598#ifdef VBOX_WITH_STATISTICS
599# define PROFILE_COUNTER(name, dsc) PDMDrvHlpSTAMDeregister(pDrvIns, &pData->Stat ## name)
600# define COUNTING_COUNTER(name, dsc) PDMDrvHlpSTAMDeregister(pDrvIns, &pData->Stat ## name)
601
602# include "counters.h"
603
604# undef COUNTING_COUNTER
605# undef PROFILE_COUNTER
606#endif /* VBOX_WITH_STATISTICS */
607}
608
609/**
610 * Marks the link as up, making it possible to establish new connections.
611 */
612void slirp_link_up(PNATState pData)
613{
614 link_up = 1;
615}
616
617/**
618 * Marks the link as down and cleans up the current connections.
619 */
620void slirp_link_down(PNATState pData)
621{
622 struct socket *so;
623
624 while ((so = tcb.so_next) != &tcb)
625 {
626 if (so->so_state & SS_NOFDREF || so->s == -1)
627 sofree(pData, so);
628 else
629 tcp_drop(pData, sototcpcb(so), 0);
630 }
631
632 while ((so = udb.so_next) != &udb)
633 udp_detach(pData, so);
634
635 link_up = 0;
636}
637
638/**
639 * Terminates the slirp component.
640 */
641void slirp_term(PNATState pData)
642{
643#ifdef RT_OS_WINDOWS
644 pData->pfIcmpCloseHandle(pData->icmp_socket.sh);
645 FreeLibrary(pData->hmIcmpLibrary);
646 RTMemFree(pData->pvIcmpBuffer);
647#else
648 closesocket(pData->icmp_socket.s);
649#endif
650
651 slirp_link_down(pData);
652 slirp_release_dns_list(pData);
653 ftp_alias_unload(pData);
654 nbt_alias_unload(pData);
655 while(!LIST_EMPTY(&instancehead)) {
656 struct libalias *la = LIST_FIRST(&instancehead);
657 /* libalias do all clean up */
658 LibAliasUninit(la);
659 }
660#ifdef RT_OS_WINDOWS
661 WSACleanup();
662#endif
663#ifdef LOG_ENABLED
664 Log(("\n"
665 "NAT statistics\n"
666 "--------------\n"
667 "\n"));
668 ipstats(pData);
669 tcpstats(pData);
670 udpstats(pData);
671 icmpstats(pData);
672 mbufstats(pData);
673 sockstats(pData);
674 Log(("\n"
675 "\n"
676 "\n"));
677#endif
678 RTMemFree(pData);
679}
680
681
682#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
683#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
684
685/*
686 * curtime kept to an accuracy of 1ms
687 */
688static void updtime(PNATState pData)
689{
690#ifdef RT_OS_WINDOWS
691 struct _timeb tb;
692
693 _ftime(&tb);
694 curtime = (u_int)tb.time * (u_int)1000;
695 curtime += (u_int)tb.millitm;
696#else
697 gettimeofday(&tt, 0);
698
699 curtime = (u_int)tt.tv_sec * (u_int)1000;
700 curtime += (u_int)tt.tv_usec / (u_int)1000;
701
702 if ((tt.tv_usec % 1000) >= 500)
703 curtime++;
704#endif
705}
706
707#ifdef RT_OS_WINDOWS
708void slirp_select_fill(PNATState pData, int *pnfds)
709#else /* RT_OS_WINDOWS */
710void slirp_select_fill(PNATState pData, int *pnfds, struct pollfd *polls)
711#endif /* !RT_OS_WINDOWS */
712{
713 struct socket *so, *so_next;
714 int nfds;
715#if defined(RT_OS_WINDOWS)
716 int rc;
717 int error;
718#else
719 int poll_index = 0;
720#endif
721 int i;
722
723 STAM_PROFILE_START(&pData->StatFill, a);
724
725 nfds = *pnfds;
726
727 /*
728 * First, TCP sockets
729 */
730 do_slowtimo = 0;
731 if (!link_up)
732 goto done;
733 /*
734 * *_slowtimo needs calling if there are IP fragments
735 * in the fragment queue, or there are TCP connections active
736 */
737 /* XXX:
738 * triggering of fragment expiration should be the same but use new macroses
739 */
740 do_slowtimo = (tcb.so_next != &tcb);
741 if (!do_slowtimo)
742 {
743 for (i = 0; i < IPREASS_NHASH; i++)
744 {
745 if (!TAILQ_EMPTY(&ipq[i]))
746 {
747 do_slowtimo = 1;
748 break;
749 }
750 }
751 }
752 ICMP_ENGAGE_EVENT(&pData->icmp_socket, readfds);
753
754 STAM_COUNTER_RESET(&pData->StatTCP);
755 STAM_COUNTER_RESET(&pData->StatTCPHot);
756
757 QSOCKET_FOREACH(so, so_next, tcp)
758 /* { */
759#if !defined(RT_OS_WINDOWS)
760 so->so_poll_index = -1;
761#endif
762 STAM_COUNTER_INC(&pData->StatTCP);
763
764 /*
765 * See if we need a tcp_fasttimo
766 */
767 if ( time_fasttimo == 0
768 && so->so_tcpcb != NULL
769 && so->so_tcpcb->t_flags & TF_DELACK)
770 time_fasttimo = curtime; /* Flag when we want a fasttimo */
771
772 /*
773 * NOFDREF can include still connecting to local-host,
774 * newly socreated() sockets etc. Don't want to select these.
775 */
776 if (so->so_state & SS_NOFDREF || so->s == -1)
777 CONTINUE(tcp);
778
779 /*
780 * Set for reading sockets which are accepting
781 */
782 if (so->so_state & SS_FACCEPTCONN)
783 {
784 STAM_COUNTER_INC(&pData->StatTCPHot);
785 TCP_ENGAGE_EVENT1(so, readfds);
786 CONTINUE(tcp);
787 }
788
789 /*
790 * Set for writing sockets which are connecting
791 */
792 if (so->so_state & SS_ISFCONNECTING)
793 {
794 Log2(("connecting %R[natsock] engaged\n",so));
795 STAM_COUNTER_INC(&pData->StatTCPHot);
796 TCP_ENGAGE_EVENT1(so, writefds);
797 }
798
799 /*
800 * Set for writing if we are connected, can send more, and
801 * we have something to send
802 */
803 if (CONN_CANFSEND(so) && so->so_rcv.sb_cc)
804 {
805 STAM_COUNTER_INC(&pData->StatTCPHot);
806 TCP_ENGAGE_EVENT1(so, writefds);
807 }
808
809 /*
810 * Set for reading (and urgent data) if we are connected, can
811 * receive more, and we have room for it XXX /2 ?
812 */
813 if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2)))
814 {
815 STAM_COUNTER_INC(&pData->StatTCPHot);
816 TCP_ENGAGE_EVENT2(so, readfds, xfds);
817 }
818 LOOP_LABEL(tcp, so, so_next);
819 }
820
821 /*
822 * UDP sockets
823 */
824 STAM_COUNTER_RESET(&pData->StatUDP);
825 STAM_COUNTER_RESET(&pData->StatUDPHot);
826
827 QSOCKET_FOREACH(so, so_next, udp)
828 /* { */
829
830 STAM_COUNTER_INC(&pData->StatUDP);
831#if !defined(RT_OS_WINDOWS)
832 so->so_poll_index = -1;
833#endif
834
835 /*
836 * See if it's timed out
837 */
838 if (so->so_expire)
839 {
840 if (so->so_expire <= curtime)
841 {
842 Log2(("NAT: %R[natsock] expired\n", so));
843 if (so->so_timeout != NULL)
844 {
845 so->so_timeout(pData, so, so->so_timeout_arg);
846 }
847#ifdef VBOX_WITH_SLIRP_MT
848 /* we need so_next for continue our cycle*/
849 so_next = so->so_next;
850#endif
851 UDP_DETACH(pData, so, so_next);
852 CONTINUE_NO_UNLOCK(udp);
853 }
854 else
855 do_slowtimo = 1; /* Let socket expire */
856 }
857
858 /*
859 * When UDP packets are received from over the link, they're
860 * sendto()'d straight away, so no need for setting for writing
861 * Limit the number of packets queued by this session to 4.
862 * Note that even though we try and limit this to 4 packets,
863 * the session could have more queued if the packets needed
864 * to be fragmented.
865 *
866 * (XXX <= 4 ?)
867 */
868 if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4)
869 {
870 STAM_COUNTER_INC(&pData->StatUDPHot);
871 UDP_ENGAGE_EVENT(so, readfds);
872 }
873 LOOP_LABEL(udp, so, so_next);
874 }
875done:
876
877#if defined(RT_OS_WINDOWS)
878 *pnfds = VBOX_EVENT_COUNT;
879#else /* RT_OS_WINDOWS */
880 AssertRelease(poll_index <= *pnfds);
881 *pnfds = poll_index;
882#endif /* !RT_OS_WINDOWS */
883
884 STAM_PROFILE_STOP(&pData->StatFill, a);
885}
886
887#if defined(RT_OS_WINDOWS)
888void slirp_select_poll(PNATState pData, int fTimeout, int fIcmp)
889#else /* RT_OS_WINDOWS */
890void slirp_select_poll(PNATState pData, struct pollfd *polls, int ndfs)
891#endif /* !RT_OS_WINDOWS */
892{
893 struct socket *so, *so_next;
894 int ret;
895#if defined(RT_OS_WINDOWS)
896 WSANETWORKEVENTS NetworkEvents;
897 int rc;
898 int error;
899#else
900 int poll_index = 0;
901#endif
902
903 STAM_PROFILE_START(&pData->StatPoll, a);
904
905 /* Update time */
906 updtime(pData);
907
908 /*
909 * See if anything has timed out
910 */
911 if (link_up)
912 {
913 if (time_fasttimo && ((curtime - time_fasttimo) >= 2))
914 {
915 STAM_PROFILE_START(&pData->StatFastTimer, a);
916 tcp_fasttimo(pData);
917 time_fasttimo = 0;
918 STAM_PROFILE_STOP(&pData->StatFastTimer, a);
919 }
920 if (do_slowtimo && ((curtime - last_slowtimo) >= 499))
921 {
922 STAM_PROFILE_START(&pData->StatSlowTimer, a);
923 ip_slowtimo(pData);
924 tcp_slowtimo(pData);
925 last_slowtimo = curtime;
926 STAM_PROFILE_STOP(&pData->StatSlowTimer, a);
927 }
928 }
929#if defined(RT_OS_WINDOWS)
930 if (fTimeout)
931 return; /* only timer update */
932#endif
933
934 /*
935 * Check sockets
936 */
937 if (!link_up)
938 goto done;
939#if defined(RT_OS_WINDOWS)
940 /*XXX: before renaming please make see define
941 * fIcmp in slirp_state.h
942 */
943 if (fIcmp)
944 sorecvfrom(pData, &pData->icmp_socket);
945#else
946 if ( (pData->icmp_socket.s != -1)
947 && CHECK_FD_SET(&pData->icmp_socket, ignored, readfds))
948 sorecvfrom(pData, &pData->icmp_socket);
949#endif
950 /*
951 * Check TCP sockets
952 */
953 QSOCKET_FOREACH(so, so_next, tcp)
954 /* { */
955
956#ifdef VBOX_WITH_SLIRP_MT
957 if ( so->so_state & SS_NOFDREF
958 && so->so_deleted == 1)
959 {
960 struct socket *son, *sop = NULL;
961 QSOCKET_LOCK(tcb);
962 if (so->so_next != NULL)
963 {
964 if (so->so_next != &tcb)
965 SOCKET_LOCK(so->so_next);
966 son = so->so_next;
967 }
968 if ( so->so_prev != &tcb
969 && so->so_prev != NULL)
970 {
971 SOCKET_LOCK(so->so_prev);
972 sop = so->so_prev;
973 }
974 QSOCKET_UNLOCK(tcb);
975 remque(pData, so);
976 NSOCK_DEC();
977 SOCKET_UNLOCK(so);
978 SOCKET_LOCK_DESTROY(so);
979 RTMemFree(so);
980 so_next = son;
981 if (sop != NULL)
982 SOCKET_UNLOCK(sop);
983 CONTINUE_NO_UNLOCK(tcp);
984 }
985#endif
986 /*
987 * FD_ISSET is meaningless on these sockets
988 * (and they can crash the program)
989 */
990 if (so->so_state & SS_NOFDREF || so->s == -1)
991 CONTINUE(tcp);
992
993 POLL_TCP_EVENTS(rc, error, so, &NetworkEvents);
994
995 LOG_NAT_SOCK(so, TCP, &NetworkEvents, readfds, writefds, xfds);
996
997
998 /*
999 * Check for URG data
1000 * This will soread as well, so no need to
1001 * test for readfds below if this succeeds
1002 */
1003
1004 /* out-of-band data */
1005 if (CHECK_FD_SET(so, NetworkEvents, xfds))
1006 {
1007 sorecvoob(pData, so);
1008 }
1009
1010 /*
1011 * Check sockets for reading
1012 */
1013 else if ( CHECK_FD_SET(so, NetworkEvents, readfds)
1014 || WIN_CHECK_FD_SET(so, NetworkEvents, acceptds))
1015 {
1016 /*
1017 * Check for incoming connections
1018 */
1019 if (so->so_state & SS_FACCEPTCONN)
1020 {
1021 TCP_CONNECT(pData, so);
1022#if defined(RT_OS_WINDOWS)
1023 if (!(NetworkEvents.lNetworkEvents & FD_CLOSE))
1024#endif
1025 CONTINUE(tcp);
1026 }
1027
1028 ret = soread(pData, so);
1029 /* Output it if we read something */
1030 if (RT_LIKELY(ret > 0))
1031 TCP_OUTPUT(pData, sototcpcb(so));
1032 }
1033
1034#if defined(RT_OS_WINDOWS)
1035 /*
1036 * Check for FD_CLOSE events.
1037 * in some cases once FD_CLOSE engaged on socket it could be flashed latter (for some reasons)
1038 */
1039 if ( (NetworkEvents.lNetworkEvents & FD_CLOSE)
1040 || (so->so_close == 1))
1041 {
1042 so->so_close = 1; /* mark it */
1043 /*
1044 * drain the socket
1045 */
1046 for (;;)
1047 {
1048 ret = soread(pData, so);
1049 if (ret > 0)
1050 TCP_OUTPUT(pData, sototcpcb(so));
1051 else
1052 break;
1053 }
1054 CONTINUE(tcp);
1055 }
1056#endif
1057
1058 /*
1059 * Check sockets for writing
1060 */
1061 if (CHECK_FD_SET(so, NetworkEvents, writefds))
1062 {
1063 /*
1064 * Check for non-blocking, still-connecting sockets
1065 */
1066 if (so->so_state & SS_ISFCONNECTING)
1067 {
1068 Log2(("connecting %R[natsock] catched\n", so));
1069 /* Connected */
1070 so->so_state &= ~SS_ISFCONNECTING;
1071
1072 /*
1073 * This should be probably guarded by PROBE_CONN too. Anyway,
1074 * we disable it on OS/2 because the below send call returns
1075 * EFAULT which causes the opened TCP socket to close right
1076 * after it has been opened and connected.
1077 */
1078#ifndef RT_OS_OS2
1079 ret = send(so->s, (const char *)&ret, 0, 0);
1080 if (ret < 0)
1081 {
1082 /* XXXXX Must fix, zero bytes is a NOP */
1083 if ( errno == EAGAIN
1084 || errno == EWOULDBLOCK
1085 || errno == EINPROGRESS
1086 || errno == ENOTCONN)
1087 CONTINUE(tcp);
1088
1089 /* else failed */
1090 so->so_state = SS_NOFDREF;
1091 }
1092 /* else so->so_state &= ~SS_ISFCONNECTING; */
1093#endif
1094
1095 /*
1096 * Continue tcp_input
1097 */
1098 TCP_INPUT(pData, (struct mbuf *)NULL, sizeof(struct ip), so);
1099 /* continue; */
1100 }
1101 else
1102 SOWRITE(ret, pData, so);
1103 /*
1104 * XXX If we wrote something (a lot), there could be the need
1105 * for a window update. In the worst case, the remote will send
1106 * a window probe to get things going again.
1107 */
1108 }
1109
1110 /*
1111 * Probe a still-connecting, non-blocking socket
1112 * to check if it's still alive
1113 */
1114#ifdef PROBE_CONN
1115 if (so->so_state & SS_ISFCONNECTING)
1116 {
1117 ret = recv(so->s, (char *)&ret, 0, 0);
1118
1119 if (ret < 0)
1120 {
1121 /* XXX */
1122 if ( errno == EAGAIN
1123 || errno == EWOULDBLOCK
1124 || errno == EINPROGRESS
1125 || errno == ENOTCONN)
1126 {
1127 CONTINUE(tcp); /* Still connecting, continue */
1128 }
1129
1130 /* else failed */
1131 so->so_state = SS_NOFDREF;
1132
1133 /* tcp_input will take care of it */
1134 }
1135 else
1136 {
1137 ret = send(so->s, &ret, 0, 0);
1138 if (ret < 0)
1139 {
1140 /* XXX */
1141 if ( errno == EAGAIN
1142 || errno == EWOULDBLOCK
1143 || errno == EINPROGRESS
1144 || errno == ENOTCONN)
1145 {
1146 CONTINUE(tcp);
1147 }
1148 /* else failed */
1149 so->so_state = SS_NOFDREF;
1150 }
1151 else
1152 so->so_state &= ~SS_ISFCONNECTING;
1153
1154 }
1155 TCP_INPUT((struct mbuf *)NULL, sizeof(struct ip),so);
1156 } /* SS_ISFCONNECTING */
1157#endif
1158#ifndef RT_OS_WINDOWS
1159 if ( UNIX_CHECK_FD_SET(so, NetworkEvents, rdhup)
1160 || UNIX_CHECK_FD_SET(so, NetworkEvents, rderr))
1161 {
1162 int err;
1163 int inq, outq;
1164 int status;
1165 socklen_t optlen = sizeof(int);
1166 inq = outq = 0;
1167 status = getsockopt(so->s, SOL_SOCKET, SO_ERROR, &err, &optlen);
1168 if (status != 0)
1169 Log(("NAT: can't get error status from %R[natsock]\n", so));
1170#ifndef RT_OS_SOLARIS
1171 status = ioctl(so->s, FIONREAD, &inq); /* tcp(7) recommends SIOCINQ which is Linux specific */
1172 if (status != 0 || status != EINVAL)
1173 {
1174 /* EINVAL returned if socket in listen state tcp(7)*/
1175 Log(("NAT: can't get depth of IN queue status from %R[natsock]\n", so));
1176 }
1177 status = ioctl(so->s, TIOCOUTQ, &outq); /* SIOCOUTQ see previous comment */
1178 if (status != 0)
1179 Log(("NAT: can't get depth of OUT queue from %R[natsock]\n", so));
1180#else
1181 /*
1182 * Solaris has bit different ioctl commands and its handlings
1183 * hint: streamio(7) I_NREAD
1184 */
1185#endif
1186 if ( so->so_state & SS_ISFCONNECTING
1187 || UNIX_CHECK_FD_SET(so, NetworkEvents, readfds))
1188 {
1189 /**
1190 * Check if we need here take care about gracefull connection
1191 * @todo try with proxy server
1192 */
1193 if (UNIX_CHECK_FD_SET(so, NetworkEvents, readfds))
1194 {
1195 /*
1196 * Never meet inq != 0 or outq != 0, anyway let it stay for a while
1197 * in case it happens we'll able to detect it.
1198 * Give TCP/IP stack wait or expire the socket.
1199 */
1200 Log(("NAT: %R[natsock] err(%d:%s) s(in:%d,out:%d)happens on read I/O, "
1201 "other side close connection \n", so, err, strerror(err), inq, outq));
1202 CONTINUE(tcp);
1203 }
1204 goto tcp_input_close;
1205 }
1206 if ( !UNIX_CHECK_FD_SET(so, NetworkEvents, readfds)
1207 && !UNIX_CHECK_FD_SET(so, NetworkEvents, writefds)
1208 && !UNIX_CHECK_FD_SET(so, NetworkEvents, xfds))
1209 {
1210 Log(("NAT: system expires the socket %R[natsock] err(%d:%s) s(in:%d,out:%d) happens on non-I/O. ",
1211 so, err, strerror(err), inq, outq));
1212 goto tcp_input_close;
1213 }
1214 Log(("NAT: %R[natsock] we've met(%d:%s) s(in:%d, out:%d) unhandled combination hup (%d) "
1215 "rederr(%d) on (r:%d, w:%d, x:%d)\n",
1216 so, err, strerror(err),
1217 inq, outq,
1218 UNIX_CHECK_FD_SET(so, ign, rdhup),
1219 UNIX_CHECK_FD_SET(so, ign, rderr),
1220 UNIX_CHECK_FD_SET(so, ign, readfds),
1221 UNIX_CHECK_FD_SET(so, ign, writefds),
1222 UNIX_CHECK_FD_SET(so, ign, xfds)));
1223 /*
1224 * Give OS's TCP/IP stack a chance to resolve an issue or expire the socket.
1225 */
1226 CONTINUE(tcp);
1227tcp_input_close:
1228 so->so_state = SS_NOFDREF; /*cause connection valid tcp connection termination and socket closing */
1229 TCP_INPUT(pData, (struct mbuf *)NULL, sizeof(struct ip), so);
1230 CONTINUE(tcp);
1231 }
1232#endif
1233 LOOP_LABEL(tcp, so, so_next);
1234 }
1235
1236 /*
1237 * Now UDP sockets.
1238 * Incoming packets are sent straight away, they're not buffered.
1239 * Incoming UDP data isn't buffered either.
1240 */
1241 QSOCKET_FOREACH(so, so_next, udp)
1242 /* { */
1243#ifdef VBOX_WITH_SLIRP_MT
1244 if ( so->so_state & SS_NOFDREF
1245 && so->so_deleted == 1)
1246 {
1247 struct socket *son, *sop = NULL;
1248 QSOCKET_LOCK(udb);
1249 if (so->so_next != NULL)
1250 {
1251 if (so->so_next != &udb)
1252 SOCKET_LOCK(so->so_next);
1253 son = so->so_next;
1254 }
1255 if ( so->so_prev != &udb
1256 && so->so_prev != NULL)
1257 {
1258 SOCKET_LOCK(so->so_prev);
1259 sop = so->so_prev;
1260 }
1261 QSOCKET_UNLOCK(udb);
1262 remque(pData, so);
1263 NSOCK_DEC();
1264 SOCKET_UNLOCK(so);
1265 SOCKET_LOCK_DESTROY(so);
1266 RTMemFree(so);
1267 so_next = son;
1268 if (sop != NULL)
1269 SOCKET_UNLOCK(sop);
1270 CONTINUE_NO_UNLOCK(udp);
1271 }
1272#endif
1273 POLL_UDP_EVENTS(rc, error, so, &NetworkEvents);
1274
1275 LOG_NAT_SOCK(so, UDP, &NetworkEvents, readfds, writefds, xfds);
1276
1277 if (so->s != -1 && CHECK_FD_SET(so, NetworkEvents, readfds))
1278 {
1279 SORECVFROM(pData, so);
1280 }
1281 LOOP_LABEL(udp, so, so_next);
1282 }
1283
1284done:
1285#ifndef VBOX_WITH_SLIRP_MT
1286 /*
1287 * See if we can start outputting
1288 */
1289 if (if_queued && link_up)
1290 if_start(pData);
1291#endif
1292
1293 STAM_PROFILE_STOP(&pData->StatPoll, a);
1294}
1295
1296#ifndef VBOX_WITHOUT_SLIRP_CLIENT_ETHER
1297#define ETH_ALEN 6
1298#define ETH_HLEN 14
1299
1300#define ARPOP_REQUEST 1 /* ARP request */
1301#define ARPOP_REPLY 2 /* ARP reply */
1302
1303struct ethhdr
1304{
1305 unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
1306 unsigned char h_source[ETH_ALEN]; /* source ether addr */
1307 unsigned short h_proto; /* packet type ID field */
1308};
1309AssertCompileSize(struct ethhdr, 14);
1310#endif
1311
1312struct arphdr
1313{
1314 unsigned short ar_hrd; /* format of hardware address */
1315 unsigned short ar_pro; /* format of protocol address */
1316 unsigned char ar_hln; /* length of hardware address */
1317 unsigned char ar_pln; /* length of protocol address */
1318 unsigned short ar_op; /* ARP opcode (command) */
1319
1320 /*
1321 * Ethernet looks like this : This bit is variable sized however...
1322 */
1323 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
1324 unsigned char ar_sip[4]; /* sender IP address */
1325 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
1326 unsigned char ar_tip[4]; /* target IP address */
1327};
1328AssertCompileSize(struct arphdr, 28);
1329
1330static void arp_input(PNATState pData, struct mbuf *m)
1331{
1332 struct ethhdr *eh;
1333 struct ethhdr *reh;
1334 struct arphdr *ah;
1335 struct arphdr *rah;
1336 int ar_op;
1337 struct ex_list *ex_ptr;
1338 uint32_t htip;
1339 uint32_t tip;
1340 struct mbuf *mr;
1341 eh = mtod(m, struct ethhdr *);
1342 ah = (struct arphdr *)&eh[1];
1343 htip = ntohl(*(uint32_t*)ah->ar_tip);
1344 tip = *(uint32_t*)ah->ar_tip;
1345
1346 mr = m_get(pData);
1347#ifdef VBOX_WITHOUT_SLIRP_CLIENT_ETHER
1348 reh = mtod(mr, struct ethhdr *);
1349 memcpy(reh->h_source, eh->h_source, ETH_ALEN); /* XXX: if_encap will swap src and dst*/
1350 Log4(("NAT: arp:%R[ether]->%R[ether]\n",
1351 reh->h_source, reh->h_dest));
1352 Log4(("NAT: arp: %R[IP4]\n", &tip));
1353#endif
1354 mr->m_data += if_maxlinkhdr;
1355 mr->m_len = sizeof(struct arphdr);
1356 rah = mtod(mr, struct arphdr *);
1357
1358 ar_op = ntohs(ah->ar_op);
1359 switch(ar_op)
1360 {
1361 case ARPOP_REQUEST:
1362#ifdef VBOX_WITH_NAT_SERVICE
1363 if (tip == special_addr.s_addr) goto arp_ok;
1364#endif
1365 if ((htip & pData->netmask) == ntohl(special_addr.s_addr))
1366 {
1367 if ( CTL_CHECK(htip, CTL_DNS)
1368 || CTL_CHECK(htip, CTL_ALIAS)
1369 || CTL_CHECK(htip, CTL_TFTP))
1370 goto arp_ok;
1371 for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
1372 {
1373 if ((htip & ~pData->netmask) == ex_ptr->ex_addr)
1374 {
1375 goto arp_ok;
1376 }
1377 }
1378 return;
1379 arp_ok:
1380 rah->ar_hrd = htons(1);
1381 rah->ar_pro = htons(ETH_P_IP);
1382 rah->ar_hln = ETH_ALEN;
1383 rah->ar_pln = 4;
1384 rah->ar_op = htons(ARPOP_REPLY);
1385 memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN);
1386
1387 switch (htip & ~pData->netmask)
1388 {
1389 case CTL_DNS:
1390 case CTL_ALIAS:
1391 rah->ar_sha[5] = (uint8_t)(htip & ~pData->netmask);
1392 break;
1393 default:;
1394 }
1395
1396 memcpy(rah->ar_sip, ah->ar_tip, 4);
1397 memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN);
1398 memcpy(rah->ar_tip, ah->ar_sip, 4);
1399 if_encap(pData, ETH_P_ARP, mr);
1400 m_free(pData, m);
1401 }
1402 break;
1403 default:
1404 break;
1405 }
1406}
1407
1408void slirp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1409{
1410 struct mbuf *m;
1411 int proto;
1412 static bool fWarnedIpv6;
1413 struct ethhdr *eh = (struct ethhdr*)pkt;
1414
1415 Log2(("NAT: slirp_input %d\n", pkt_len));
1416 if (pkt_len < ETH_HLEN)
1417 {
1418 LogRel(("NAT: packet having size %d has been ingnored\n", pkt_len));
1419 return;
1420 }
1421 Log4(("NAT: in:%R[ether]->%R[ether]\n", &eh->h_source, &eh->h_dest));
1422#ifdef VBOX_WITHOUT_SLIRP_CLIENT_ETHER
1423 if (memcmp(eh->h_source, special_ethaddr, ETH_ALEN) == 0)
1424 {
1425 /* @todo vasily: add ether logging routine in debug.c */
1426 Log(("NAT: packet was addressed to other MAC\n"));
1427 RTMemFree((void *)pkt);
1428 return;
1429 }
1430#endif
1431
1432 m = m_get(pData);
1433 if (!m)
1434 {
1435 LogRel(("NAT: can't allocate new mbuf\n"));
1436 return;
1437 }
1438
1439 /* Note: we add to align the IP header */
1440
1441 if (M_FREEROOM(m) < pkt_len)
1442 m_inc(m, pkt_len);
1443
1444 m->m_len = pkt_len ;
1445 memcpy(m->m_data, pkt, pkt_len);
1446
1447 proto = ntohs(*(uint16_t *)(pkt + 12));
1448 switch(proto)
1449 {
1450 case ETH_P_ARP:
1451 arp_input(pData, m);
1452 break;
1453 case ETH_P_IP:
1454 /* Update time. Important if the network is very quiet, as otherwise
1455 * the first outgoing connection gets an incorrect timestamp. */
1456 updtime(pData);
1457 m_adj(m, ETH_HLEN);
1458 ip_input(pData, m);
1459 break;
1460 case ETH_P_IPV6:
1461 m_free(pData, m);
1462 if (!fWarnedIpv6)
1463 {
1464 LogRel(("NAT: IPv6 not supported\n"));
1465 fWarnedIpv6 = true;
1466 }
1467 break;
1468 default:
1469 Log(("NAT: Unsupported protocol %x\n", proto));
1470 m_free(pData, m);
1471 break;
1472 }
1473 RTMemFree((void *)pkt);
1474}
1475
1476/* output the IP packet to the ethernet device */
1477void if_encap(PNATState pData, uint16_t eth_proto, struct mbuf *m)
1478{
1479 struct ethhdr *eh;
1480 uint8_t *buf = RTMemAlloc(1600);
1481 STAM_PROFILE_START(&pData->StatIF_encap, a);
1482
1483 m->m_data -= if_maxlinkhdr;
1484 m->m_len += ETH_HLEN;
1485 eh = mtod(m, struct ethhdr *);
1486
1487 if(MBUF_HEAD(m) != m->m_data)
1488 {
1489 LogRel(("NAT: ethernet detects corruption of the packet"));
1490 AssertMsgFailed(("!!Ethernet frame corrupted!!"));
1491 }
1492
1493#ifndef VBOX_WITHOUT_SLIRP_CLIENT_ETHER
1494 memcpy(eh->h_dest, client_ethaddr, ETH_ALEN);
1495 memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1);
1496 /* XXX: not correct */
1497 eh->h_source[5] = CTL_ALIAS;
1498#else
1499 if (memcmp(eh->h_source, special_ethaddr, ETH_ALEN) != 0)
1500 {
1501 memcpy(eh->h_dest, eh->h_source, ETH_ALEN);
1502 memcpy(eh->h_source, special_ethaddr, ETH_ALEN);
1503 Assert(memcmp(eh->h_dest, special_ethaddr, ETH_ALEN) != 0);
1504 if (memcmp(eh->h_dest, zerro_ethaddr, ETH_ALEN) == 0)
1505 {
1506 /* don't do anything */
1507 goto done;
1508 }
1509 }
1510#endif
1511 eh->h_proto = htons(eth_proto);
1512#if 0
1513 slirp_output(pData->pvUser, m, mtod(m, uint8_t *), m->m_len);
1514#else
1515 memcpy(buf, mtod(m, uint8_t *), m->m_len);
1516 slirp_output(pData->pvUser, NULL, buf, m->m_len);
1517done:
1518 STAM_PROFILE_STOP(&pData->StatIF_encap, a);
1519 m_free(pData, m);
1520#endif
1521}
1522
1523int slirp_redir(PNATState pData, int is_udp, struct in_addr host_addr, int host_port,
1524 struct in_addr guest_addr, int guest_port)
1525{
1526 struct socket *so;
1527 struct alias_link *link;
1528 struct libalias *lib;
1529 int flags;
1530 struct sockaddr sa;
1531 struct sockaddr_in *psin;
1532 socklen_t socketlen;
1533 struct in_addr alias;
1534 int rc;
1535
1536 Log2(("NAT: set redirect %s hp:%d gp:%d\n", (is_udp?"UDP":"TCP"), host_port, guest_port));
1537 if (is_udp)
1538 {
1539 so = udp_listen(pData, host_addr.s_addr, htons(host_port), guest_addr.s_addr,
1540 htons(guest_port), 0);
1541 }
1542 else
1543 {
1544 so = solisten(pData, host_addr.s_addr, htons(host_port), guest_addr.s_addr,
1545 htons(guest_port), 0);
1546 }
1547 if (so == NULL)
1548 {
1549 return -1;
1550 }
1551
1552 psin = (struct sockaddr_in *)&sa;
1553 psin->sin_family = AF_INET;
1554 psin->sin_port = 0;
1555 psin->sin_addr.s_addr = INADDR_ANY;
1556 socketlen = sizeof(struct sockaddr);
1557
1558 rc = getsockname(so->s, &sa, &socketlen);
1559 if (rc < 0 || sa.sa_family != AF_INET)
1560 {
1561 Log(("NAT: can't get socket's name\n"));
1562 return 1;
1563 }
1564
1565 psin = (struct sockaddr_in *)&sa;
1566
1567#if 1
1568 lib = LibAliasInit(pData, NULL);
1569 flags = LibAliasSetMode(lib, 0, 0);
1570 flags |= PKT_ALIAS_LOG; /* set logging */
1571 flags |= PKT_ALIAS_REVERSE; /* set logging */
1572 flags = LibAliasSetMode(lib, flags, ~0);
1573#else
1574 lib = LIST_FIRST(&instancehead);
1575#endif
1576
1577 alias.s_addr = htonl(ntohl(guest_addr.s_addr) | CTL_ALIAS);
1578 link = LibAliasRedirectPort(lib, psin->sin_addr, htons(host_port),
1579 alias, htons(guest_port),
1580 special_addr, -1, /* not very clear for now*/
1581 (is_udp ? IPPROTO_UDP : IPPROTO_TCP));
1582 if (link == NULL)
1583 {
1584 Log(("NAT: can't create redirect\n"));
1585 return 1;
1586 }
1587 so->so_la = lib;
1588
1589 return 0;
1590}
1591
1592int slirp_add_exec(PNATState pData, int do_pty, const char *args, int addr_low_byte,
1593 int guest_port)
1594{
1595 return add_exec(&exec_list, do_pty, (char *)args,
1596 addr_low_byte, htons(guest_port));
1597}
1598
1599void slirp_set_ethaddr(PNATState pData, const uint8_t *ethaddr)
1600{
1601#ifndef VBOX_WITHOUT_SLIRP_CLIENT_ETHER
1602 memcpy(client_ethaddr, ethaddr, ETH_ALEN);
1603#endif
1604}
1605
1606#if defined(RT_OS_WINDOWS)
1607HANDLE *slirp_get_events(PNATState pData)
1608{
1609 return pData->phEvents;
1610}
1611void slirp_register_external_event(PNATState pData, HANDLE hEvent, int index)
1612{
1613 pData->phEvents[index] = hEvent;
1614}
1615#endif
1616
1617unsigned int slirp_get_timeout_ms(PNATState pData)
1618{
1619 if (link_up)
1620 {
1621 if (time_fasttimo)
1622 return 2;
1623 if (do_slowtimo)
1624 return 500; /* see PR_SLOWHZ */
1625 }
1626 return 0;
1627}
1628
1629#ifndef RT_OS_WINDOWS
1630int slirp_get_nsock(PNATState pData)
1631{
1632 return pData->nsock;
1633}
1634#endif
1635
1636/*
1637 * this function called from NAT thread
1638 */
1639void slirp_post_sent(PNATState pData, void *pvArg)
1640{
1641 struct socket *so = 0;
1642 struct tcpcb *tp = 0;
1643 struct mbuf *m = (struct mbuf *)pvArg;
1644 m_free(pData, m);
1645}
1646#ifdef VBOX_WITH_SLIRP_MT
1647void slirp_process_queue(PNATState pData)
1648{
1649 RTReqProcess(pData->pReqQueue, RT_INDEFINITE_WAIT);
1650}
1651void *slirp_get_queue(PNATState pData)
1652{
1653 return pData->pReqQueue;
1654}
1655#endif
1656
1657uint16_t slirp_get_service(int proto, uint16_t dport, uint16_t sport)
1658{
1659 uint16_t hdport, hsport, service;
1660 hdport = ntohs(dport);
1661 hsport = ntohs(sport);
1662 Log2(("proto: %d, dport: %d sport: %d\n", proto, hdport, hsport));
1663 service = 0;
1664#if 0
1665 /* Always return 0 here */
1666 switch (hdport)
1667 {
1668 case 500:
1669 if (hsport != 500) /* vpnc by default try operate in src:500/dst:500 mode*/
1670 /* Not sure why this make Cisco VPN client's connection more stable,
1671 * at least on some servers
1672 */
1673 service = sport;
1674 break;
1675 }
1676#endif
1677 Log2(("service : %d\n", service));
1678 return htons(service);
1679}
1680
1681void slirp_set_dhcp_TFTP_prefix(PNATState pData, const char *tftpPrefix)
1682{
1683 Log2(("tftp_prefix:%s\n", tftpPrefix));
1684 tftp_prefix = tftpPrefix;
1685}
1686
1687void slirp_set_dhcp_TFTP_bootfile(PNATState pData, const char *bootFile)
1688{
1689 Log2(("bootFile:%s\n", bootFile));
1690 bootp_filename = bootFile;
1691}
1692
1693void slirp_set_dhcp_next_server(PNATState pData, const char *next_server)
1694{
1695 Log2(("next_server:%s\n", next_server));
1696 if (next_server == NULL)
1697 pData->tftp_server.s_addr = htonl(ntohl(special_addr.s_addr) | CTL_TFTP);
1698 else
1699 inet_aton(next_server, &pData->tftp_server);
1700}
1701
1702int slirp_set_binding_address(PNATState pData, char *addr)
1703{
1704 if (addr == NULL || (inet_aton(addr, &pData->bindIP) == 0))
1705 {
1706 pData->bindIP.s_addr = INADDR_ANY;
1707 return 1;
1708 }
1709 return 0;
1710}
1711
1712void slirp_set_dhcp_dns_proxy(PNATState pData, bool fDNSProxy)
1713{
1714 Log2(("NAT: DNS proxy switched %s\n", (fDNSProxy ? "on" : "off")));
1715 pData->use_dns_proxy = fDNSProxy;
1716}
1717
1718#define CHECK_ARG(name, val, lim_min, lim_max) \
1719do { \
1720 if ((val) < (lim_min) || (val) > (lim_max)) \
1721 { \
1722 LogRel(("NAT: (" #name ":%d) has been ignored, " \
1723 "because out of range (%d, %d)\n", (val), (lim_min), (lim_max))); \
1724 return; \
1725 } \
1726 else \
1727 { \
1728 LogRel(("NAT: (" #name ":%d)\n", (val))); \
1729 } \
1730} while (0)
1731
1732/* don't allow user set less 8kB and more than 1M values */
1733#define _8K_1M_CHECK_ARG(name, val) CHECK_ARG(name, (val), 8, 1024)
1734void slirp_set_rcvbuf(PNATState pData, int kilobytes)
1735{
1736 _8K_1M_CHECK_ARG("SOCKET_RCVBUF", kilobytes);
1737 pData->socket_rcv = kilobytes;
1738}
1739void slirp_set_sndbuf(PNATState pData, int kilobytes)
1740{
1741 _8K_1M_CHECK_ARG("SOCKET_SNDBUF", kilobytes);
1742 pData->socket_snd = kilobytes * _1K;
1743}
1744void slirp_set_tcp_rcvspace(PNATState pData, int kilobytes)
1745{
1746 _8K_1M_CHECK_ARG("TCP_RCVSPACE", kilobytes);
1747 tcp_rcvspace = kilobytes * _1K;
1748}
1749void slirp_set_tcp_sndspace(PNATState pData, int kilobytes)
1750{
1751 _8K_1M_CHECK_ARG("TCP_SNDSPACE", kilobytes);
1752 tcp_sndspace = kilobytes * _1K;
1753}
1754
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