VirtualBox

source: vbox/trunk/src/VBox/Devices/Network/slirp/slirp.c@ 16611

Last change on this file since 16611 was 16611, checked in by vboxsync, 16 years ago

NAT:Poll specific error handling was added
  • Property svn:eol-style set to native
File size: 46.2 KB
Line 
1#include "slirp.h"
2#ifdef RT_OS_OS2
3# include <paths.h>
4#endif
5
6#include <VBox/err.h>
7#include <VBox/pdmdrv.h>
8#include <iprt/assert.h>
9#ifndef RT_OS_WINDOWS
10#include <poll.h>
11#endif
12
13#if !defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) || !defined(RT_OS_WINDOWS)
14
15# ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
16# define DO_ENGAGE_EVENT1(so, fdset, label) \
17 do { \
18 FD_SET((so)->s, (fdset)); \
19 UPD_NFDS((so)->s); \
20 } while(0)
21
22
23# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
24 do { \
25 FD_SET((so)->s, (fdset1)); \
26 FD_SET((so)->s, (fdset2)); \
27 UPD_NFDS((so)->s); \
28 } while(0)
29
30# define DO_POLL_EVENTS(rc, error, so, events, label) do {} while (0)
31
32# define DO_CHECK_FD_SET(so, events, fdset) (FD_ISSET((so)->s, fdset))
33# define DO_UNIX_CHECK_FD_SET(so, events, fdset ) 0 /*specific for Unix API */
34# else /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
35# define DO_ENGAGE_EVENT1(so, fdset, label) \
36 do { \
37 polls[poll_index].fd = (so)->s; \
38 (so)->so_poll_index = poll_index; \
39 polls[poll_index].events = N_(fdset ## _poll); \
40 poll_index++; \
41 } while(0)
42
43
44# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
45 do { \
46 polls[poll_index].fd = (so)->s; \
47 (so)->so_poll_index = poll_index; \
48 polls[poll_index].events = N_(fdset1 ## _poll) | N_(fdset1 ## _poll); \
49 poll_index++; \
50 } while(0)
51
52# define DO_POLL_EVENTS(rc, error, so, events, label) do {} while (0)
53
54# define DO_CHECK_FD_SET(so, events, fdset) ( ((so)->so_poll_index != -1) \
55 && ((so)->so_poll_index <= ndfs) \
56 && ((so)->s == polls[so->so_poll_index].fd) \
57 && (polls[(so)->so_poll_index].revents & N_(fdset ## _poll)))
58# define DO_UNIX_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset) /*specific for Unix API */
59# define DO_WIN_CHECK_FD_SET(so, events, fdset ) 0 /* specific for Windows Winsock API */
60# endif /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
61
62# ifndef RT_OS_WINDOWS
63
64# ifndef RT_OS_LINUX
65# define readfds_poll (POLLRDNORM)
66# define writefds_poll (POLLWRNORM)
67# define xfds_poll (POLLRDBAND|POLLWRBAND|POLLPRI)
68# else
69# define readfds_poll (POLLIN)
70# define writefds_poll (POLLOUT)
71# define xfds_poll (POLLPRI)
72# endif
73# define rderr_poll (POLLERR)
74# define rdhup_poll (POLLHUP)
75# define nval_poll (POLLNVAL)
76
77# define ICMP_ENGAGE_EVENT(so, fdset) \
78 do { \
79 if (pData->icmp_socket.s != -1) \
80 DO_ENGAGE_EVENT1((so), fdset, ICMP); \
81 } while (0)
82# else /* !RT_OS_WINDOWS */
83# define DO_WIN_CHECK_FD_SET(so, events, fdset ) DO_CHECK_FD_SET((so), (events), fdset)
84# define ICMP_ENGAGE_EVENT(so, fdset) do {} while(0)
85#endif /* RT_OS_WINDOWS */
86
87#else /* defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS) */
88
89/*
90 * On Windows, we will be notified by IcmpSendEcho2() when the response arrives.
91 * So no call to WSAEventSelect necessary.
92 */
93# define ICMP_ENGAGE_EVENT(so, fdset) do {} while(0)
94
95# define DO_ENGAGE_EVENT1(so, fdset1, label) \
96 do { \
97 rc = WSAEventSelect((so)->s, VBOX_SOCKET_EVENT, FD_ALL_EVENTS); \
98 if (rc == SOCKET_ERROR) \
99 { \
100 /* This should not happen */ \
101 error = WSAGetLastError(); \
102 LogRel(("WSAEventSelect (" #label ") error %d (so=%x, socket=%s, event=%x)\n", \
103 error, (so), (so)->s, VBOX_SOCKET_EVENT)); \
104 } \
105 } while(0); \
106 CONTINUE(label)
107
108# define DO_ENGAGE_EVENT2(so, fdset1, fdset2, label) \
109 DO_ENGAGE_EVENT1((so), (fdset1), label)
110
111# define DO_POLL_EVENTS(rc, error, so, events, label) \
112 (rc) = WSAEnumNetworkEvents((so)->s, VBOX_SOCKET_EVENT, (events)); \
113 if ((rc) == SOCKET_ERROR) \
114 { \
115 (error) = WSAGetLastError(); \
116 LogRel(("WSAEnumNetworkEvents " #label " error %d\n", (error))); \
117 CONTINUE(label); \
118 }
119
120# define acceptds_win FD_ACCEPT
121# define acceptds_win_bit FD_ACCEPT_BIT
122
123# define readfds_win FD_READ
124# define readfds_win_bit FD_READ_BIT
125
126# define writefds_win FD_WRITE
127# define writefds_win_bit FD_WRITE_BIT
128
129# define xfds_win FD_OOB
130# define xfds_win_bit FD_OOB_BIT
131
132# define DO_CHECK_FD_SET(so, events, fdset) \
133 (((events).lNetworkEvents & fdset ## _win) && ((events).iErrorCode[fdset ## _win_bit] == 0))
134
135# define DO_UNIX_CHECK_FD_SET(so, events, fdset ) 1 /*specific for Unix API */
136
137#endif /* defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS) */
138
139#define TCP_ENGAGE_EVENT1(so, fdset) \
140 DO_ENGAGE_EVENT1((so), fdset, tcp)
141
142#define TCP_ENGAGE_EVENT2(so, fdset1, fdset2) \
143 DO_ENGAGE_EVENT2((so), fdset1, fdset2, tcp)
144
145#define UDP_ENGAGE_EVENT(so, fdset) \
146 DO_ENGAGE_EVENT1((so), fdset, udp)
147
148#define POLL_TCP_EVENTS(rc, error, so, events) \
149 DO_POLL_EVENTS((rc), (error), (so), (events), tcp)
150
151#define POLL_UDP_EVENTS(rc, error, so, events) \
152 DO_POLL_EVENTS((rc), (error), (so), (events), udp)
153
154#define CHECK_FD_SET(so, events, set) \
155 (DO_CHECK_FD_SET((so), (events), set))
156
157#define WIN_CHECK_FD_SET(so, events, set) \
158 (DO_WIN_CHECK_FD_SET((so), (events), set))
159#define UNIX_CHECK_FD_SET(so, events, set) \
160 (DO_UNIX_CHECK_FD_SET(so, events, set))
161
162/*
163 * Loging macros
164 */
165#if VBOX_WITH_DEBUG_NAT_SOCKETS
166# if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC)
167# if defined(RT_OS_WINDOWS)
168# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
169 do { \
170 LogRel((" " #proto " %R[natsock] %R[natwinnetevents]\n", (so), (winevent))); \
171 } while (0)
172# else /* RT_OS_WINDOWS */
173# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
174 do { \
175 LogRel((" " #proto " %R[natsock] %s %s %s er: %s, %s, %s\n", (so), \
176 CHECK_FD_SET(so, ign ,r_fdset) ? "READ":"", \
177 CHECK_FD_SET(so, ign, w_fdset) ? "WRITE":"", \
178 CHECK_FD_SET(so, ign, x_fdset) ? "OOB":"", \
179 CHECK_FD_SET(so, ign, rderr) ? "RDERR":"", \
180 CHECK_FD_SET(so, ign, rdhup) ? "RDHUP":"", \
181 CHECK_FD_SET(so, ign, nval) ? "RDNVAL":"")); \
182 } while (0)
183# endif /* !RT_OS_WINDOWS */
184# else /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
185# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) \
186 do { \
187 LogRel((" " #proto " %R[natsock] %s %s %s\n", (so), FD_ISSET((so)->s, (r_fdset))?"READ":"",\
188 FD_ISSET((so)->s, (w_fdset))?"WRITE":"", FD_ISSET((so)->s, (x_fdset))?"OOB":"")); \
189 } while (0)
190# endif
191#else /* VBOX_WITH_DEBUG_NAT_SOCKETS */
192# define DO_LOG_NAT_SOCK(so, proto, winevent, r_fdset, w_fdset, x_fdset) do {} while (0)
193#endif /* !VBOX_WITH_DEBUG_NAT_SOCKETS */
194
195#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)
196
197static const uint8_t special_ethaddr[6] =
198{
199 0x52, 0x54, 0x00, 0x12, 0x35, 0x00
200};
201
202#ifdef RT_OS_WINDOWS
203
204static int get_dns_addr_domain(PNATState pData, bool fVerbose,
205 struct in_addr *pdns_addr,
206 const char **ppszDomain)
207{
208 int rc = 0;
209 FIXED_INFO *FixedInfo = NULL;
210 ULONG BufLen;
211 DWORD ret;
212 IP_ADDR_STRING *pIPAddr;
213 struct in_addr tmp_addr;
214
215 FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO));
216 BufLen = sizeof(FIXED_INFO);
217
218 /** @todo: this API returns all DNS servers, no matter whether the
219 * corresponding network adapter is disabled or not. Maybe replace
220 * this by GetAdapterAddresses(), which is XP/Vista only though. */
221 if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen))
222 {
223 if (FixedInfo)
224 {
225 GlobalFree(FixedInfo);
226 FixedInfo = NULL;
227 }
228 FixedInfo = GlobalAlloc(GPTR, BufLen);
229 }
230
231 if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS)
232 {
233 Log(("GetNetworkParams failed. ret = %08x\n", (u_int)ret ));
234 if (FixedInfo)
235 {
236 GlobalFree(FixedInfo);
237 FixedInfo = NULL;
238 }
239 rc = -1;
240 goto get_dns_prefix;
241 }
242
243#ifndef VBOX_WITH_MULTI_DNS
244 pIPAddr = &(FixedInfo->DnsServerList);
245 inet_aton(pIPAddr->IpAddress.String, &tmp_addr);
246 Log(("nat: DNS Servers:\n"));
247 if (fVerbose || pdns_addr->s_addr != tmp_addr.s_addr)
248 LogRel(("NAT: DNS address: %s\n", pIPAddr->IpAddress.String));
249 *pdns_addr = tmp_addr;
250
251 pIPAddr = FixedInfo -> DnsServerList.Next;
252 while (pIPAddr)
253 {
254 if (fVerbose)
255 LogRel(("NAT: ignored DNS address: %s\n", pIPAddr ->IpAddress.String));
256 pIPAddr = pIPAddr ->Next;
257 }
258#else
259 /*localhost mask */
260 for (pIPAddr = &FixedInfo->DnsServerList; pIPAddr != NULL; pIPAddr = pIPAddr->Next)
261 {
262 struct dns_entry *da;
263 if(!inet_aton(pIPAddr->IpAddress.String, &tmp_addr))
264 continue;
265 da = RTMemAllocZ(sizeof (struct dns_entry));
266 if (da == NULL)
267 {
268 LogRel(("can't alloc memory for DNS entry\n"));
269 return -1;
270 }
271 /*check */
272 if ((da->de_addr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET)) {
273 da->de_addr.s_addr = htonl(ntohl(special_addr.s_addr) | CTL_ALIAS);
274 }
275 LIST_INSERT_HEAD(&pData->dns_list_head, da, de_list);
276 }
277#endif
278 if (FixedInfo)
279 {
280 GlobalFree(FixedInfo);
281 FixedInfo = NULL;
282 }
283
284get_dns_prefix:
285 if (ppszDomain)
286 {
287 OSVERSIONINFO ver;
288 char szDnsDomain[256];
289 DWORD dwSize = sizeof(szDnsDomain);
290
291 *ppszDomain = NULL;
292 GetVersionEx(&ver);
293 if (ver.dwMajorVersion >= 5)
294 {
295 /* GetComputerNameEx exists in Windows versions starting with 2000. */
296 if (GetComputerNameEx(ComputerNameDnsDomain, szDnsDomain, &dwSize))
297 {
298 if (szDnsDomain[0])
299 {
300 /* Just non-empty strings are valid. */
301 *ppszDomain = RTStrDup(szDnsDomain);
302 if (pData->fPassDomain)
303 {
304 if (fVerbose)
305 LogRel(("NAT: passing domain name %s\n", szDnsDomain));
306 }
307 else
308 Log(("nat: ignoring domain %s\n", szDnsDomain));
309 }
310 }
311 else
312 Log(("nat: GetComputerNameEx failed (%d)\n", GetLastError()));
313 }
314 }
315 return rc;
316}
317
318#else
319
320static int get_dns_addr_domain(PNATState pData, bool fVerbose,
321 struct in_addr *pdns_addr,
322 const char **ppszDomain)
323{
324 char buff[512];
325 char buff2[256];
326 FILE *f;
327 int found = 0;
328 struct in_addr tmp_addr;
329
330#ifdef RT_OS_OS2
331 /* Try various locations. */
332 char *etc = getenv("ETC");
333 f = NULL;
334 if (etc)
335 {
336 snprintf(buff, sizeof(buff), "%s/RESOLV2", etc);
337 f = fopen(buff, "rt");
338 }
339 if (!f)
340 {
341 snprintf(buff, sizeof(buff), "%s/RESOLV2", _PATH_ETC);
342 f = fopen(buff, "rt");
343 }
344 if (!f)
345 {
346 snprintf(buff, sizeof(buff), "%s/resolv.conf", _PATH_ETC);
347 f = fopen(buff, "rt");
348 }
349#else
350 f = fopen("/etc/resolv.conf", "r");
351#endif
352 if (!f)
353 return -1;
354
355 if (ppszDomain)
356 *ppszDomain = NULL;
357 Log(("nat: DNS Servers:\n"));
358 while (fgets(buff, 512, f) != NULL)
359 {
360#ifdef VBOX_WITH_MULTI_DNS
361 struct dns_entry *da = NULL;
362#endif
363 if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1)
364 {
365 if (!inet_aton(buff2, &tmp_addr))
366 continue;
367#ifndef VBOX_WITH_MULTI_DNS
368 /* If it's the first one, set it to dns_addr */
369 if (!found)
370 {
371 if (fVerbose || pdns_addr->s_addr != tmp_addr.s_addr)
372 LogRel(("NAT: DNS address: %s\n", buff2));
373 *pdns_addr = tmp_addr;
374 }
375 else
376 {
377 if (fVerbose)
378 LogRel(("NAT: ignored DNS address: %s\n", buff2));
379 }
380#else
381 /*localhost mask */
382 da = RTMemAllocZ(sizeof (struct dns_entry));
383 if (da == NULL)
384 {
385 LogRel(("can't alloc memory for DNS entry\n"));
386 return -1;
387 }
388 /*check */
389 da->de_addr.s_addr = tmp_addr.s_addr;
390 if ((da->de_addr.s_addr & htonl(IN_CLASSA_NET)) == ntohl(INADDR_LOOPBACK & IN_CLASSA_NET)) {
391 da->de_addr.s_addr = htonl(ntohl(special_addr.s_addr) | CTL_ALIAS);
392 }
393 LIST_INSERT_HEAD(&pData->dns_list_head, da, de_list);
394#endif
395 found++;
396 }
397 if ( ppszDomain
398 && (!strncmp(buff, "domain", 6) || !strncmp(buff, "search", 6)))
399 {
400 /* Domain name/search list present. Pick first entry */
401 if (*ppszDomain == NULL)
402 {
403 char *tok;
404 char *saveptr;
405 tok = strtok_r(&buff[6], " \t\n", &saveptr);
406 if (tok)
407 {
408 *ppszDomain = RTStrDup(tok);
409 if (pData->fPassDomain)
410 {
411 if (fVerbose)
412 LogRel(("NAT: passing domain name %s\n", tok));
413 }
414 else
415 Log(("nat: ignoring domain %s\n", tok));
416 }
417 }
418 }
419 }
420 fclose(f);
421 if (!found)
422 return -1;
423 return 0;
424}
425
426#endif
427
428int get_dns_addr(PNATState pData, struct in_addr *pdns_addr)
429{
430 return get_dns_addr_domain(pData, false, pdns_addr, NULL);
431}
432
433int slirp_init(PNATState *ppData, const char *pszNetAddr, uint32_t u32Netmask,
434 bool fPassDomain, const char *pszTFTPPrefix,
435 const char *pszBootFile, void *pvUser)
436{
437 int fNATfailed = 0;
438 int rc;
439 PNATState pData = RTMemAllocZ(sizeof(NATState));
440 *ppData = pData;
441 if (!pData)
442 return VERR_NO_MEMORY;
443 if (u32Netmask & 0x1f)
444 /* CTL is x.x.x.15, bootp passes up to 16 IPs (15..31) */
445 return VERR_INVALID_PARAMETER;
446 memset(pData, '\0', sizeof(NATState));
447 pData->fPassDomain = fPassDomain;
448 pData->pvUser = pvUser;
449 tftp_prefix = pszTFTPPrefix;
450 bootp_filename = pszBootFile;
451 pData->netmask = u32Netmask;
452
453#ifdef RT_OS_WINDOWS
454 {
455 WSADATA Data;
456 WSAStartup(MAKEWORD(2,0), &Data);
457 }
458# if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC)
459 pData->phEvents[VBOX_SOCKET_EVENT_INDEX] = CreateEvent(NULL, FALSE, FALSE, NULL);
460# endif
461#endif
462#ifdef VBOX_WITH_SLIRP_MT
463 QSOCKET_LOCK_CREATE(tcb);
464 QSOCKET_LOCK_CREATE(udb);
465 rc = RTReqCreateQueue(&pData->pReqQueue);
466 AssertReleaseRC(rc);
467#endif
468
469 link_up = 1;
470
471 debug_init();
472 if_init(pData);
473 ip_init(pData);
474 icmp_init(pData);
475
476 /* Initialise mbufs *after* setting the MTU */
477 m_init(pData);
478
479 inet_aton(pszNetAddr, &special_addr);
480 alias_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS);
481 /* @todo: add ability to configure this staff */
482 pData->tftp_server.s_addr = htonl(ntohl(special_addr.s_addr) | CTL_TFTP);
483
484 /* set default addresses */
485 inet_aton("127.0.0.1", &loopback_addr);
486#ifndef VBOX_WITH_MULTI_DNS
487 inet_aton("127.0.0.1", &dns_addr);
488
489 if (get_dns_addr_domain(pData, true, &dns_addr, &pData->pszDomain) < 0)
490#else
491 LIST_INIT(&pData->dns_list_head);
492 if (get_dns_addr_domain(pData, true, NULL, &pData->pszDomain) < 0)
493#endif
494 fNATfailed = 1;
495
496 getouraddr(pData);
497 return fNATfailed ? VINF_NAT_DNS : VINF_SUCCESS;
498}
499
500/**
501 * Statistics counters.
502 */
503void slirp_register_timers(PNATState pData, PPDMDRVINS pDrvIns)
504{
505#ifdef VBOX_WITH_STATISTICS
506 PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatFill, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
507 STAMUNIT_TICKS_PER_CALL, "Profiling slirp fills", "/Drivers/NAT%d/Fill", pDrvIns->iInstance);
508 PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatPoll, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
509 STAMUNIT_TICKS_PER_CALL, "Profiling slirp polls", "/Drivers/NAT%d/Poll", pDrvIns->iInstance);
510 PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatFastTimer, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
511 STAMUNIT_TICKS_PER_CALL, "Profiling slirp fast timer", "/Drivers/NAT%d/TimerFast", pDrvIns->iInstance);
512 PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatSlowTimer, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS,
513 STAMUNIT_TICKS_PER_CALL, "Profiling slirp slow timer", "/Drivers/NAT%d/TimerSlow", pDrvIns->iInstance);
514 PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatTCP, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
515 STAMUNIT_COUNT, "TCP sockets", "/Drivers/NAT%d/SockTCP", pDrvIns->iInstance);
516 PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatTCPHot, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
517 STAMUNIT_COUNT, "TCP sockets active", "/Drivers/NAT%d/SockTCPHot", pDrvIns->iInstance);
518 PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatUDP, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
519 STAMUNIT_COUNT, "UDP sockets", "/Drivers/NAT%d/SockUDP", pDrvIns->iInstance);
520 PDMDrvHlpSTAMRegisterF(pDrvIns, &pData->StatUDPHot, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS,
521 STAMUNIT_COUNT, "UDP sockets active", "/Drivers/NAT%d/SockUDPHot", pDrvIns->iInstance);
522#endif /* VBOX_WITH_STATISTICS */
523}
524
525/**
526 * Marks the link as up, making it possible to establish new connections.
527 */
528void slirp_link_up(PNATState pData)
529{
530 link_up = 1;
531}
532
533/**
534 * Marks the link as down and cleans up the current connections.
535 */
536void slirp_link_down(PNATState pData)
537{
538 struct socket *so;
539
540 while ((so = tcb.so_next) != &tcb)
541 {
542 if (so->so_state & SS_NOFDREF || so->s == -1)
543 sofree(pData, so);
544 else
545 tcp_drop(pData, sototcpcb(so), 0);
546 }
547
548 while ((so = udb.so_next) != &udb)
549 udp_detach(pData, so);
550
551 link_up = 0;
552}
553
554/**
555 * Terminates the slirp component.
556 */
557void slirp_term(PNATState pData)
558{
559#ifdef VBOX_WITH_MULTI_DNS
560 struct dns_entry *de = NULL;
561#endif
562 if (pData->pszDomain)
563 RTStrFree((char *)(void *)pData->pszDomain);
564
565#ifdef RT_OS_WINDOWS
566 pData->pfIcmpCloseHandle(pData->icmp_socket.sh);
567 FreeLibrary(pData->hmIcmpLibrary);
568 RTMemFree(pData->pvIcmpBuffer);
569# else
570 closesocket(pData->icmp_socket.s);
571#endif
572
573 slirp_link_down(pData);
574#ifdef VBOX_WITH_MULTI_DNS
575 while(!LIST_EMPTY(&pData->dns_list_head)) {
576 de = LIST_FIRST(&pData->dns_list_head);
577 LIST_REMOVE(de, de_list);
578 RTMemFree(de);
579 }
580#endif
581#ifdef RT_OS_WINDOWS
582 WSACleanup();
583#endif
584#ifdef LOG_ENABLED
585 Log(("\n"
586 "NAT statistics\n"
587 "--------------\n"
588 "\n"));
589 ipstats(pData);
590 tcpstats(pData);
591 udpstats(pData);
592 icmpstats(pData);
593 mbufstats(pData);
594 sockstats(pData);
595 Log(("\n"
596 "\n"
597 "\n"));
598#endif
599 RTMemFree(pData);
600}
601
602
603#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
604#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
605#define UPD_NFDS(x) if (nfds < (x)) nfds = (x)
606
607/*
608 * curtime kept to an accuracy of 1ms
609 */
610#ifdef RT_OS_WINDOWS
611static void updtime(PNATState pData)
612{
613 struct _timeb tb;
614
615 _ftime(&tb);
616 curtime = (u_int)tb.time * (u_int)1000;
617 curtime += (u_int)tb.millitm;
618}
619#else
620static void updtime(PNATState pData)
621{
622 gettimeofday(&tt, 0);
623
624 curtime = (u_int)tt.tv_sec * (u_int)1000;
625 curtime += (u_int)tt.tv_usec / (u_int)1000;
626
627 if ((tt.tv_usec % 1000) >= 500)
628 curtime++;
629}
630#endif
631
632#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
633void slirp_select_fill(PNATState pData, int *pnfds,
634 fd_set *readfds, fd_set *writefds, fd_set *xfds)
635#else /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
636# ifdef RT_OS_WINDOWS
637void slirp_select_fill(PNATState pData, int *pnfds)
638# else /* RT_OS_WINDOWS */
639void slirp_select_fill(PNATState pData, int *pnfds, struct pollfd *polls)
640# endif /* !RT_OS_WINDOWS */
641#endif /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
642{
643 struct socket *so, *so_next;
644 int nfds;
645#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
646 int rc;
647 int error;
648#endif
649#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && !defined(RT_OS_WINDOWS)
650 int poll_index = 0;
651#endif
652 int i;
653
654 STAM_PROFILE_START(&pData->StatFill, a);
655
656 nfds = *pnfds;
657
658 /*
659 * First, TCP sockets
660 */
661 do_slowtimo = 0;
662 if (link_up)
663 {
664 /*
665 * *_slowtimo needs calling if there are IP fragments
666 * in the fragment queue, or there are TCP connections active
667 */
668 /* XXX:
669 * triggering of fragment expiration should be the same but use new macroses
670 */
671 do_slowtimo = (tcb.so_next != &tcb);
672 if (!do_slowtimo)
673 {
674 for (i = 0; i < IPREASS_NHASH; i++)
675 {
676 if (!TAILQ_EMPTY(&ipq[i]))
677 {
678 do_slowtimo = 1;
679 break;
680 }
681 }
682 }
683 ICMP_ENGAGE_EVENT(&pData->icmp_socket, readfds);
684
685 STAM_COUNTER_RESET(&pData->StatTCP);
686 STAM_COUNTER_RESET(&pData->StatTCPHot);
687
688 QSOCKET_FOREACH(so, so_next, tcp)
689 /* { */
690 STAM_COUNTER_INC(&pData->StatTCP);
691
692 /*
693 * See if we need a tcp_fasttimo
694 */
695 if ( time_fasttimo == 0
696 && so->so_tcpcb != NULL
697 && so->so_tcpcb->t_flags & TF_DELACK)
698 time_fasttimo = curtime; /* Flag when we want a fasttimo */
699
700 /*
701 * NOFDREF can include still connecting to local-host,
702 * newly socreated() sockets etc. Don't want to select these.
703 */
704 if (so->so_state & SS_NOFDREF || so->s == -1)
705 CONTINUE(tcp);
706
707 /*
708 * Set for reading sockets which are accepting
709 */
710 if (so->so_state & SS_FACCEPTCONN)
711 {
712 STAM_COUNTER_INC(&pData->StatTCPHot);
713 TCP_ENGAGE_EVENT1(so, readfds);
714 CONTINUE(tcp);
715 }
716
717 /*
718 * Set for writing sockets which are connecting
719 */
720 if (so->so_state & SS_ISFCONNECTING)
721 {
722 Log2(("connecting %R[natsock] engaged\n",so));
723 STAM_COUNTER_INC(&pData->StatTCPHot);
724 TCP_ENGAGE_EVENT1(so, writefds);
725 }
726
727 /*
728 * Set for writing if we are connected, can send more, and
729 * we have something to send
730 */
731 if (CONN_CANFSEND(so) && so->so_rcv.sb_cc)
732 {
733 STAM_COUNTER_INC(&pData->StatTCPHot);
734 TCP_ENGAGE_EVENT1(so, writefds);
735 }
736
737 /*
738 * Set for reading (and urgent data) if we are connected, can
739 * receive more, and we have room for it XXX /2 ?
740 */
741 if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2)))
742 {
743 STAM_COUNTER_INC(&pData->StatTCPHot);
744 TCP_ENGAGE_EVENT2(so, readfds, xfds);
745 }
746 LOOP_LABEL(tcp, so, so_next);
747 }
748
749 /*
750 * UDP sockets
751 */
752 STAM_COUNTER_RESET(&pData->StatUDP);
753 STAM_COUNTER_RESET(&pData->StatUDPHot);
754
755 QSOCKET_FOREACH(so, so_next, udp)
756 /* { */
757
758 STAM_COUNTER_INC(&pData->StatUDP);
759
760 /*
761 * See if it's timed out
762 */
763 if (so->so_expire)
764 {
765 if (so->so_expire <= curtime)
766 {
767#ifdef VBOX_WITH_SLIRP_MT
768 /* we need so_next for continue our cycle*/
769 so_next = so->so_next;
770#endif
771 UDP_DETACH(pData, so, so_next);
772 CONTINUE_NO_UNLOCK(udp);
773 }
774 else
775 do_slowtimo = 1; /* Let socket expire */
776 }
777
778 /*
779 * When UDP packets are received from over the link, they're
780 * sendto()'d straight away, so no need for setting for writing
781 * Limit the number of packets queued by this session to 4.
782 * Note that even though we try and limit this to 4 packets,
783 * the session could have more queued if the packets needed
784 * to be fragmented.
785 *
786 * (XXX <= 4 ?)
787 */
788 if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4)
789 {
790 STAM_COUNTER_INC(&pData->StatUDPHot);
791 UDP_ENGAGE_EVENT(so, readfds);
792 }
793 LOOP_LABEL(udp, so, so_next);
794 }
795
796 }
797
798#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC)
799# if defined(RT_OS_WINDOWS)
800 *pnfds = VBOX_EVENT_COUNT;
801# else /* RT_OS_WINDOWS */
802 *pnfds = poll_index;
803# endif /* !RT_OS_WINDOWS */
804#else /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
805 *pnfds = nfds;
806#endif /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
807
808 STAM_PROFILE_STOP(&pData->StatFill, a);
809}
810
811#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC)
812# if defined(RT_OS_WINDOWS)
813void slirp_select_poll(PNATState pData, int fTimeout, int fIcmp)
814# else /* RT_OS_WINDOWS */
815void slirp_select_poll(PNATState pData, struct pollfd *polls, int ndfs)
816# endif /* !RT_OS_WINDOWS */
817#else /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
818void slirp_select_poll(PNATState pData, fd_set *readfds, fd_set *writefds, fd_set *xfds)
819#endif /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
820{
821 struct socket *so, *so_next;
822 int ret;
823#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
824 WSANETWORKEVENTS NetworkEvents;
825 int rc;
826 int error;
827#endif
828#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && !defined(RT_OS_WINDOWS)
829 int poll_index = 0;
830#endif
831
832 STAM_PROFILE_START(&pData->StatPoll, a);
833
834 /* Update time */
835 updtime(pData);
836
837 /*
838 * See if anything has timed out
839 */
840 if (link_up)
841 {
842 if (time_fasttimo && ((curtime - time_fasttimo) >= 2))
843 {
844 STAM_PROFILE_START(&pData->StatFastTimer, a);
845 tcp_fasttimo(pData);
846 time_fasttimo = 0;
847 STAM_PROFILE_STOP(&pData->StatFastTimer, a);
848 }
849 if (do_slowtimo && ((curtime - last_slowtimo) >= 499))
850 {
851 STAM_PROFILE_START(&pData->StatSlowTimer, a);
852 ip_slowtimo(pData);
853 tcp_slowtimo(pData);
854 last_slowtimo = curtime;
855 STAM_PROFILE_STOP(&pData->StatSlowTimer, a);
856 }
857 }
858#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
859 if (fTimeout)
860 return; /* only timer update */
861#endif
862
863 /*
864 * Check sockets
865 */
866 if (link_up)
867 {
868#if defined(RT_OS_WINDOWS)
869 /*XXX: before renaming please make see define
870 * fIcmp in slirp_state.h
871 */
872 if (fIcmp)
873 sorecvfrom(pData, &pData->icmp_socket);
874#else
875 if ( (pData->icmp_socket.s != -1)
876 && CHECK_FD_SET(&pData->icmp_socket, ignored, readfds))
877 sorecvfrom(pData, &pData->icmp_socket);
878#endif
879 /*
880 * Check TCP sockets
881 */
882 QSOCKET_FOREACH(so, so_next, tcp)
883 /* { */
884
885#ifdef VBOX_WITH_SLIRP_MT
886 if ( so->so_state & SS_NOFDREF
887 && so->so_deleted == 1)
888 {
889 struct socket *son, *sop = NULL;
890 QSOCKET_LOCK(tcb);
891 if (so->so_next != NULL)
892 {
893 if (so->so_next != &tcb)
894 SOCKET_LOCK(so->so_next);
895 son = so->so_next;
896 }
897 if ( so->so_prev != &tcb
898 && so->so_prev != NULL)
899 {
900 SOCKET_LOCK(so->so_prev);
901 sop = so->so_prev;
902 }
903 QSOCKET_UNLOCK(tcb);
904 remque(pData, so);
905 NSOCK_DEC();
906 SOCKET_UNLOCK(so);
907 SOCKET_LOCK_DESTROY(so);
908 RTMemFree(so);
909 so_next = son;
910 if (sop != NULL)
911 SOCKET_UNLOCK(sop);
912 CONTINUE_NO_UNLOCK(tcp);
913 }
914#endif
915 /*
916 * FD_ISSET is meaningless on these sockets
917 * (and they can crash the program)
918 */
919 if (so->so_state & SS_NOFDREF || so->s == -1)
920 CONTINUE(tcp);
921
922 POLL_TCP_EVENTS(rc, error, so, &NetworkEvents);
923
924 LOG_NAT_SOCK(so, TCP, &NetworkEvents, readfds, writefds, xfds);
925
926 /*
927 * Check for URG data
928 * This will soread as well, so no need to
929 * test for readfds below if this succeeds
930 */
931
932 /* out-of-band data */
933 if (CHECK_FD_SET(so, NetworkEvents, xfds))
934 {
935 sorecvoob(pData, so);
936 }
937
938 /*
939 * Check sockets for reading
940 */
941 else if ( CHECK_FD_SET(so, NetworkEvents, readfds)
942 || WIN_CHECK_FD_SET(so, NetworkEvents, acceptds))
943 {
944 /*
945 * Check for incoming connections
946 */
947 if (so->so_state & SS_FACCEPTCONN)
948 {
949 TCP_CONNECT(pData, so);
950#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
951 if (!(NetworkEvents.lNetworkEvents & FD_CLOSE))
952#endif
953 CONTINUE(tcp);
954 }
955
956 ret = soread(pData, so);
957 /* Output it if we read something */
958 if (ret > 0)
959 TCP_OUTPUT(pData, sototcpcb(so));
960 }
961
962#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
963 /*
964 * Check for FD_CLOSE events.
965 */
966 if (NetworkEvents.lNetworkEvents & FD_CLOSE)
967 {
968 /*
969 * drain the socket
970 */
971 for (;;)
972 {
973 ret = soread(pData, so);
974 if (ret > 0)
975 TCP_OUTPUT(pData, sototcpcb(so));
976 else
977 break;
978 }
979 }
980#endif
981
982 /*
983 * Check sockets for writing
984 */
985 if (CHECK_FD_SET(so, NetworkEvents, writefds))
986 {
987 /*
988 * Check for non-blocking, still-connecting sockets
989 */
990 if (so->so_state & SS_ISFCONNECTING)
991 {
992 Log2(("connecting %R[natsock] catched\n", so));
993 /* Connected */
994 so->so_state &= ~SS_ISFCONNECTING;
995
996 /*
997 * This should be probably guarded by PROBE_CONN too. Anyway,
998 * we disable it on OS/2 because the below send call returns
999 * EFAULT which causes the opened TCP socket to close right
1000 * after it has been opened and connected.
1001 */
1002#ifndef RT_OS_OS2
1003 ret = send(so->s, (const char *)&ret, 0, 0);
1004 if (ret < 0)
1005 {
1006 /* XXXXX Must fix, zero bytes is a NOP */
1007 if ( errno == EAGAIN
1008 || errno == EWOULDBLOCK
1009 || errno == EINPROGRESS
1010 || errno == ENOTCONN)
1011 CONTINUE(tcp);
1012
1013 /* else failed */
1014 so->so_state = SS_NOFDREF;
1015 }
1016 /* else so->so_state &= ~SS_ISFCONNECTING; */
1017#endif
1018
1019 /*
1020 * Continue tcp_input
1021 */
1022 TCP_INPUT(pData, (struct mbuf *)NULL, sizeof(struct ip), so);
1023 /* continue; */
1024 }
1025 else
1026 SOWRITE(ret, pData, so);
1027 /*
1028 * XXX If we wrote something (a lot), there could be the need
1029 * for a window update. In the worst case, the remote will send
1030 * a window probe to get things going again.
1031 */
1032 }
1033
1034 /*
1035 * Probe a still-connecting, non-blocking socket
1036 * to check if it's still alive
1037 */
1038#ifdef PROBE_CONN
1039 if (so->so_state & SS_ISFCONNECTING)
1040 {
1041 ret = recv(so->s, (char *)&ret, 0, 0);
1042
1043 if (ret < 0)
1044 {
1045 /* XXX */
1046 if ( errno == EAGAIN
1047 || errno == EWOULDBLOCK
1048 || errno == EINPROGRESS
1049 || errno == ENOTCONN)
1050 {
1051 CONTINUE(tcp); /* Still connecting, continue */
1052 }
1053
1054 /* else failed */
1055 so->so_state = SS_NOFDREF;
1056
1057 /* tcp_input will take care of it */
1058 }
1059 else
1060 {
1061 ret = send(so->s, &ret, 0, 0);
1062 if (ret < 0)
1063 {
1064 /* XXX */
1065 if ( errno == EAGAIN
1066 || errno == EWOULDBLOCK
1067 || errno == EINPROGRESS
1068 || errno == ENOTCONN)
1069 {
1070 CONTINUE(tcp);
1071 }
1072 /* else failed */
1073 so->so_state = SS_NOFDREF;
1074 }
1075 else
1076 so->so_state &= ~SS_ISFCONNECTING;
1077
1078 }
1079 TCP_INPUT((struct mbuf *)NULL, sizeof(struct ip),so);
1080 } /* SS_ISFCONNECTING */
1081#endif
1082#ifndef RT_OS_WINDOWS
1083 if ( UNIX_CHECK_FD_SET(so, NetworkEvents, rdhup)
1084 && UNIX_CHECK_FD_SET(so, NetworkEvents, rderr))
1085 {
1086 if (so->so_state & SS_ISFCONNECTING)
1087 {
1088 so->so_state = SS_NOFDREF;
1089 TCP_INPUT(pData, (struct mbuf *)NULL, sizeof(struct ip), so);
1090 }
1091 /* Here should be other error handlings */
1092 }
1093#endif
1094 LOOP_LABEL(tcp, so, so_next);
1095 }
1096
1097 /*
1098 * Now UDP sockets.
1099 * Incoming packets are sent straight away, they're not buffered.
1100 * Incoming UDP data isn't buffered either.
1101 */
1102 QSOCKET_FOREACH(so, so_next, udp)
1103 /* { */
1104#ifdef VBOX_WITH_SLIRP_MT
1105 if ( so->so_state & SS_NOFDREF
1106 && so->so_deleted == 1)
1107 {
1108 struct socket *son, *sop = NULL;
1109 QSOCKET_LOCK(udb);
1110 if (so->so_next != NULL)
1111 {
1112 if (so->so_next != &udb)
1113 SOCKET_LOCK(so->so_next);
1114 son = so->so_next;
1115 }
1116 if ( so->so_prev != &udb
1117 && so->so_prev != NULL)
1118 {
1119 SOCKET_LOCK(so->so_prev);
1120 sop = so->so_prev;
1121 }
1122 QSOCKET_UNLOCK(udb);
1123 remque(pData, so);
1124 NSOCK_DEC();
1125 SOCKET_UNLOCK(so);
1126 SOCKET_LOCK_DESTROY(so);
1127 RTMemFree(so);
1128 so_next = son;
1129 if (sop != NULL)
1130 SOCKET_UNLOCK(sop);
1131 CONTINUE_NO_UNLOCK(udp);
1132 }
1133#endif
1134 POLL_UDP_EVENTS(rc, error, so, &NetworkEvents);
1135
1136 LOG_NAT_SOCK(so, UDP, &NetworkEvents, readfds, writefds, xfds);
1137
1138 if (so->s != -1 && CHECK_FD_SET(so, NetworkEvents, readfds))
1139 {
1140 SORECVFROM(pData, so);
1141 }
1142 LOOP_LABEL(udp, so, so_next);
1143 }
1144
1145 }
1146
1147#ifndef VBOX_WITH_SLIRP_MT
1148 /*
1149 * See if we can start outputting
1150 */
1151 if (if_queued && link_up)
1152 if_start(pData);
1153#endif
1154
1155 STAM_PROFILE_STOP(&pData->StatPoll, a);
1156}
1157
1158#define ETH_ALEN 6
1159#define ETH_HLEN 14
1160
1161#define ARPOP_REQUEST 1 /* ARP request */
1162#define ARPOP_REPLY 2 /* ARP reply */
1163
1164struct ethhdr
1165{
1166 unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
1167 unsigned char h_source[ETH_ALEN]; /* source ether addr */
1168 unsigned short h_proto; /* packet type ID field */
1169};
1170
1171struct arphdr
1172{
1173 unsigned short ar_hrd; /* format of hardware address */
1174 unsigned short ar_pro; /* format of protocol address */
1175 unsigned char ar_hln; /* length of hardware address */
1176 unsigned char ar_pln; /* length of protocol address */
1177 unsigned short ar_op; /* ARP opcode (command) */
1178
1179 /*
1180 * Ethernet looks like this : This bit is variable sized however...
1181 */
1182 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
1183 unsigned char ar_sip[4]; /* sender IP address */
1184 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
1185 unsigned char ar_tip[4]; /* target IP address */
1186};
1187
1188static
1189#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1190void arp_input(PNATState pData, struct mbuf *m)
1191#else
1192void arp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1193#endif
1194{
1195 struct ethhdr *eh;
1196 struct ethhdr *reh;
1197 struct arphdr *ah;
1198 struct arphdr *rah;
1199 int ar_op;
1200 struct ex_list *ex_ptr;
1201 uint32_t htip;
1202#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1203 uint8_t arp_reply[sizeof(struct arphdr) + ETH_HLEN];
1204 eh = (struct ethhdr *)pkt;
1205#else
1206 struct mbuf *mr;
1207 eh = mtod(m, struct ethhdr *);
1208#endif
1209 ah = (struct arphdr *)&eh[1];
1210 htip = ntohl(*(uint32_t*)ah->ar_tip);
1211
1212#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1213 mr = m_get(pData);
1214 mr->m_data += if_maxlinkhdr;
1215 mr->m_len = sizeof(struct arphdr);
1216 rah = mtod(mr, struct arphdr *);
1217#else
1218 reh = (struct ethhdr *)arp_reply;
1219 rah = (struct arphdr *)&reh[1];
1220#endif
1221
1222 ar_op = ntohs(ah->ar_op);
1223 switch(ar_op)
1224 {
1225 case ARPOP_REQUEST:
1226 if ((htip & pData->netmask) == ntohl(special_addr.s_addr))
1227 {
1228 if ( CTL_CHECK(htip,CTL_DNS)
1229 || CTL_CHECK(htip, CTL_ALIAS)
1230 || CTL_CHECK(htip, CTL_TFTP))
1231 goto arp_ok;
1232 for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
1233 {
1234 if ((htip & ~pData->netmask) == ex_ptr->ex_addr)
1235 goto arp_ok;
1236 }
1237 return;
1238 arp_ok:
1239
1240#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1241 memcpy(reh->h_dest, eh->h_source, ETH_ALEN);
1242 memcpy(reh->h_source, &special_addr, ETH_ALEN);
1243 reh->h_source[5] = ah->ar_tip[3];
1244 reh->h_proto = htons(ETH_P_ARP);
1245#endif
1246 rah->ar_hrd = htons(1);
1247 rah->ar_pro = htons(ETH_P_IP);
1248 rah->ar_hln = ETH_ALEN;
1249 rah->ar_pln = 4;
1250 rah->ar_op = htons(ARPOP_REPLY);
1251 memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN);
1252
1253 switch (htip & ~pData->netmask)
1254 {
1255 case CTL_DNS:
1256 case CTL_ALIAS:
1257 rah->ar_sha[5] = (uint8_t)(htip & ~pData->netmask);
1258 break;
1259 default:;
1260 }
1261
1262 memcpy(rah->ar_sip, ah->ar_tip, 4);
1263 memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN);
1264 memcpy(rah->ar_tip, ah->ar_sip, 4);
1265#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1266 if_encap(pData, ETH_P_ARP, mr);
1267 m_free(pData, m);
1268#else
1269 slirp_output(pData->pvUser, arp_reply, sizeof(arp_reply));
1270#endif
1271 }
1272 break;
1273 default:
1274 break;
1275 }
1276}
1277
1278void slirp_input(PNATState pData, const uint8_t *pkt, int pkt_len)
1279{
1280 struct mbuf *m;
1281 int proto;
1282 static bool fWarnedIpv6;
1283
1284 if (pkt_len < ETH_HLEN)
1285 {
1286 LogRel(("NAT: packet having size %d has been ingnored\n", pkt_len));
1287 return;
1288 }
1289
1290 m = m_get(pData);
1291 if (!m)
1292 {
1293 LogRel(("can't allocate new mbuf\n"));
1294 return;
1295 }
1296
1297 /* Note: we add to align the IP header */
1298
1299 if (M_FREEROOM(m) < pkt_len)
1300 m_inc(m, pkt_len);
1301
1302 m->m_len = pkt_len ;
1303 memcpy(m->m_data, pkt, pkt_len);
1304
1305 proto = ntohs(*(uint16_t *)(pkt + 12));
1306 switch(proto)
1307 {
1308 case ETH_P_ARP:
1309#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1310 arp_input(pData, m);
1311#else
1312 arp_input(pData, pkt, pkt_len);
1313 m_free(pData, m);
1314#endif
1315 break;
1316 case ETH_P_IP:
1317 /* Update time. Important if the network is very quiet, as otherwise
1318 * the first outgoing connection gets an incorrect timestamp. */
1319 updtime(pData);
1320 m->m_data += ETH_HLEN;
1321 m->m_len -= ETH_HLEN;
1322 ip_input(pData, m);
1323 break;
1324 case ETH_P_IPV6:
1325 m_free(pData, m);
1326 if (!fWarnedIpv6)
1327 {
1328 LogRel(("NAT: IPv6 not supported\n"));
1329 fWarnedIpv6 = true;
1330 }
1331 break;
1332 default:
1333 LogRel(("NAT: Unsupported protocol %x\n", proto));
1334 m_free(pData, m);
1335 break;
1336 }
1337 RTMemFree((void *)pkt);
1338}
1339
1340/* output the IP packet to the ethernet device */
1341#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1342void if_encap(PNATState pData, uint16_t eth_proto, struct mbuf *m)
1343#else
1344void if_encap(PNATState pData, uint8_t *ip_data, int ip_data_len)
1345#endif
1346{
1347#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1348 struct ethhdr *eh;
1349 uint8_t *buf = RTMemAlloc(1600);
1350 m->m_data -= if_maxlinkhdr;
1351 m->m_len += ETH_HLEN;
1352 eh = mtod(m, struct ethhdr *);
1353#else
1354 uint8_t buf[1600];
1355 struct ethhdr *eh = (struct ethhdr *)buf;
1356
1357 if (ip_data_len + ETH_HLEN > sizeof(buf))
1358 return;
1359
1360 memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len);
1361#endif
1362
1363
1364 memcpy(eh->h_dest, client_ethaddr, ETH_ALEN);
1365 memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1);
1366 /* XXX: not correct */
1367 eh->h_source[5] = CTL_ALIAS;
1368#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
1369 eh->h_proto = htons(eth_proto);
1370#if 0
1371 slirp_output(pData->pvUser, m, mtod(m, uint8_t *), m->m_len);
1372#else
1373 memcpy(buf, mtod(m, uint8_t *), m->m_len);
1374 slirp_output(pData->pvUser, NULL, buf, m->m_len);
1375 m_free(pData, m);
1376#endif
1377#else
1378 eh->h_proto = htons(ETH_P_IP);
1379 slirp_output(pData->pvUser, buf, ip_data_len + ETH_HLEN);
1380#endif
1381}
1382
1383int slirp_redir(PNATState pData, int is_udp, int host_port,
1384 struct in_addr guest_addr, int guest_port)
1385{
1386 if (is_udp)
1387 {
1388 if (!udp_listen(pData, htons(host_port), guest_addr.s_addr,
1389 htons(guest_port), 0))
1390 return -1;
1391 }
1392 else
1393 {
1394 if (!solisten(pData, htons(host_port), guest_addr.s_addr,
1395 htons(guest_port), 0))
1396 return -1;
1397 }
1398 return 0;
1399}
1400
1401int slirp_add_exec(PNATState pData, int do_pty, const char *args, int addr_low_byte,
1402 int guest_port)
1403{
1404 return add_exec(&exec_list, do_pty, (char *)args,
1405 addr_low_byte, htons(guest_port));
1406}
1407
1408void slirp_set_ethaddr(PNATState pData, const uint8_t *ethaddr)
1409{
1410 memcpy(client_ethaddr, ethaddr, ETH_ALEN);
1411}
1412
1413#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
1414HANDLE *slirp_get_events(PNATState pData)
1415{
1416 return pData->phEvents;
1417}
1418void slirp_register_external_event(PNATState pData, HANDLE hEvent, int index)
1419{
1420 pData->phEvents[index] = hEvent;
1421}
1422#endif
1423
1424unsigned int slirp_get_timeout_ms(PNATState pData)
1425{
1426 if (link_up)
1427 {
1428 if (time_fasttimo)
1429 return 2;
1430 if (do_slowtimo)
1431 return 500; /* see PR_SLOWHZ */
1432 }
1433 return 0;
1434}
1435
1436#ifndef RT_OS_WINDOWS
1437int slirp_get_nsock(PNATState pData)
1438{
1439 return pData->nsock;
1440}
1441#endif
1442
1443/*
1444 * this function called from NAT thread
1445 */
1446void slirp_post_sent(PNATState pData, void *pvArg)
1447{
1448 struct socket *so = 0;
1449 struct tcpcb *tp = 0;
1450 struct mbuf *m = (struct mbuf *)pvArg;
1451 m_free(pData, m);
1452}
1453#ifdef VBOX_WITH_SLIRP_MT
1454void slirp_process_queue(PNATState pData)
1455{
1456 RTReqProcess(pData->pReqQueue, RT_INDEFINITE_WAIT);
1457}
1458void *slirp_get_queue(PNATState pData)
1459{
1460 return pData->pReqQueue;
1461}
1462#endif
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