slirp.h@ 91942

Last change on this file since 91942 was 87126, checked in by vboxsync, 4 years ago
slirp: arp_input - more checks on incoming packets.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 12.7 KB

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1	/* $Id: slirp.h 87126 2020-12-25 02:51:44Z vboxsync $ */
2	/** @file
3	* NAT - slirp (declarations/defines).
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	#ifndef __COMMON_H__
19	#define __COMMON_H__
20
21	#include <VBox/vmm/stam.h>
22
23	#ifdef RT_OS_WINDOWS
24	# include <iprt/win/winsock2.h>
25	# include <iprt/win/ws2tcpip.h>
26	typedef int socklen_t;
27	#endif
28	#ifdef RT_OS_OS2 /* temporary workaround, see ticket #127 */
29	# define mbstat mbstat_os2
30	# include <sys/socket.h>
31	# undef mbstat
32	typedef int socklen_t;
33	#endif
34
35	#define CONFIG_QEMU
36
37	#ifdef DEBUG
38	# undef DEBUG
39	# define DEBUG 1
40	#endif
41
42	#ifndef CONFIG_QEMU
43	# include "version.h"
44	#endif
45	#define LOG_GROUP LOG_GROUP_DRV_NAT
46	#include <VBox/log.h>
47	#include <iprt/mem.h>
48	#ifdef RT_OS_WINDOWS
49	# include <iprt/win/windows.h>
50	# include <io.h>
51	#endif
52	#include <iprt/asm.h>
53	#include <iprt/assert.h>
54	#include <iprt/string.h>
55	#include <iprt/dir.h>
56	#include <iprt/rand.h>
57	#include <iprt/net.h>
58	#include <VBox/types.h>
59
60	#undef malloc
61	#define malloc dont_use_malloc
62	#undef free
63	#define free dont_use_free
64	#undef realloc
65	#define realloc dont_use_realloc
66	#undef strdup
67	#define strdup dont_use_strdup
68
69	#include "slirp_config.h"
70
71	#ifdef RT_OS_WINDOWS
72
73	# ifndef _MSC_VER
74	# include <inttypes.h>
75	# endif
76
77
78	# include <sys/timeb.h>
79	# include <iprt/win/iphlpapi.h>
80
81	/* We don't want the errno.h versions of these error defines. */
82	# if defined(_MSC_VER) && _MSC_VER >= 1600
83	# include <errno.h>
84	# undef ECONNREFUSED
85	# undef ECONNRESET
86	# undef EHOSTDOWN
87	# undef EHOSTUNREACH
88	# undef EINPROGRESS
89	# undef ENETDOWN
90	# undef ENETUNREACH
91	# undef ENOTCONN
92	# undef ESHUTDOWN
93	# undef EWOULDBLOCK
94	# endif
95	# define ECONNREFUSED WSAECONNREFUSED
96	# define ECONNRESET WSAECONNRESET
97	# define EHOSTDOWN WSAEHOSTDOWN
98	# define EHOSTUNREACH WSAEHOSTUNREACH
99	# define EINPROGRESS WSAEINPROGRESS
100	# define ENETDOWN WSAENETDOWN
101	# define ENETUNREACH WSAENETUNREACH
102	# define ENOTCONN WSAENOTCONN
103	# define ESHUTDOWN WSAESHUTDOWN
104	# define EWOULDBLOCK WSAEWOULDBLOCK
105
106	/* standard names for the shutdown() "how" argument */
107	#define SHUT_RD SD_RECEIVE
108	#define SHUT_WR SD_SEND
109	#define SHUT_RDWR SD_BOTH
110
111	typedef uint8_t u_int8_t;
112	typedef uint16_t u_int16_t;
113	typedef uint32_t u_int32_t;
114
115	#else /* !RT_OS_WINDOWS */
116
117	# define ioctlsocket ioctl
118	# define closesocket(s) close(s)
119	# define O_BINARY 0
120
121	#endif /* !RT_OS_WINDOWS */
122
123	#if defined(RT_OS_WINDOWS) \|\| defined (RT_OS_SOLARIS)
124	typedef uint64_t u_int64_t;
125	typedef char *caddr_t;
126	#endif
127
128	#include <sys/types.h>
129	#ifdef HAVE_SYS_BITYPES_H
130	# include <sys/bitypes.h>
131	#endif
132
133	#ifdef _MSC_VER
134	# include <time.h>
135	#else /* !_MSC_VER */
136	# include <sys/time.h>
137	#endif /* !_MSC_VER */
138
139	#ifdef NEED_TYPEDEFS
140	typedef char int8_t;
141	typedef unsigned char u_int8_t;
142
143	# if SIZEOF_SHORT == 2
144	typedef short int16_t;
145	typedef unsigned short u_int16_t;
146	# else
147	# if SIZEOF_INT == 2
148	typedef int int16_t;
149	typedef unsigned int u_int16_t;
150	# else
151	#error Cannot find a type with sizeof() == 2
152	# endif
153	# endif
154
155	# if SIZEOF_SHORT == 4
156	typedef short int32_t;
157	typedef unsigned short u_int32_t;
158	# else
159	# if SIZEOF_INT == 4
160	typedef int int32_t;
161	typedef unsigned int u_int32_t;
162	# else
163	#error Cannot find a type with sizeof() == 4
164	# endif
165	# endif
166	#endif /* NEED_TYPEDEFS */
167
168	#ifdef HAVE_UNISTD_H
169	# include <unistd.h>
170	#endif
171
172	#ifdef HAVE_STDLIB_H
173	# include <stdlib.h>
174	#endif
175
176	#include <errno.h>
177
178
179	#ifndef HAVE_MEMMOVE
180	# define memmove(x, y, z) bcopy(y, x, z)
181	#endif
182
183	#if TIME_WITH_SYS_TIME
184	# include <sys/time.h>
185	# include <time.h>
186	#else
187	# ifndef HAVE_SYS_TIME_H
188	# define HAVE_SYS_TIME_H 0
189	# endif
190	# if HAVE_SYS_TIME_H
191	# include <sys/time.h>
192	# else
193	# include <time.h>
194	# endif
195	#endif
196
197	#ifdef HAVE_STRING_H
198	# include <string.h>
199	#else
200	# include <strings.h>
201	#endif
202
203	#ifndef RT_OS_WINDOWS
204	# include <sys/uio.h>
205	#endif
206
207	#ifndef RT_OS_WINDOWS
208	# include <netinet/in.h>
209	# include <arpa/inet.h>
210	#endif
211
212	#ifdef GETTIMEOFDAY_ONE_ARG
213	# define gettimeofday(x, y) gettimeofday(x)
214	#endif
215
216	#ifndef HAVE_INET_ATON
217	int inet_aton (const char cp, struct in_addr ia);
218	#endif
219
220	#include <fcntl.h>
221	#ifndef NO_UNIX_SOCKETS
222	# include <sys/un.h>
223	#endif
224	#include <signal.h>
225	#ifdef HAVE_SYS_SIGNAL_H
226	# include <sys/signal.h>
227	#endif
228	#ifndef RT_OS_WINDOWS
229	# include <sys/socket.h>
230	#endif
231
232	#if defined(HAVE_SYS_IOCTL_H)
233	# include <sys/ioctl.h>
234	#endif
235
236	#ifdef HAVE_SYS_SELECT_H
237	# include <sys/select.h>
238	#endif
239
240	#ifdef HAVE_SYS_WAIT_H
241	# include <sys/wait.h>
242	#endif
243
244	#ifdef HAVE_SYS_FILIO_H
245	# include <sys/filio.h>
246	#endif
247
248	#if defined(__STDC__) \|\| defined(_MSC_VER)
249	# include <stdarg.h>
250	#else
251	# include <varargs.h>
252	#endif
253
254	#include <sys/stat.h>
255
256	/* Avoid conflicting with the libc insque() and remque(), which
257	* have different prototypes. */
258	#define insque slirp_insque
259	#define remque slirp_remque
260
261	#ifdef HAVE_SYS_STROPTS_H
262	# include <sys/stropts.h>
263	#endif
264
265	#include "libslirp.h"
266
267	#include "debug.h"
268
269	#include "ip.h"
270	#include "tcp.h"
271	#include "tcp_timer.h"
272	#include "tcp_var.h"
273	#include "tcpip.h"
274	#include "udp.h"
275	#include "icmp_var.h"
276	#include "mbuf.h"
277	#include "if.h"
278	#include "sbuf.h"
279	#include "socket.h"
280	#include "main.h"
281	#include "misc.h"
282	#include "ctl.h"
283	#include "bootp.h"
284	#include "tftp.h"
285
286	#include "slirp_state.h"
287	#include "slirp_dns.h"
288
289	#undef PVM /* XXX Mac OS X hack */
290
291	#ifndef NULL
292	# define NULL (void *)0
293	#endif
294
295	void if_start (PNATState);
296
297	#ifndef HAVE_INDEX
298	char index (const char , int);
299	#endif
300
301	#ifndef HAVE_GETHOSTID
302	long gethostid (void);
303	#endif
304
305	#ifndef RT_OS_WINDOWS
306	#include <netdb.h>
307	#endif
308
309	#include "dnsproxy/dnsproxy.h"
310
311	#define DEFAULT_BAUD 115200
312
313	int get_dns_addr(PNATState pData);
314
315	/* cksum.c */
316	typedef uint16_t u_short;
317	typedef unsigned int u_int;
318	#include "in_cksum.h"
319
320	/* if.c */
321	void if_init (PNATState);
322	void if_output (PNATState, struct socket , struct mbuf );
323
324	/* ip_input.c */
325	void ip_init (PNATState);
326	void ip_input (PNATState, struct mbuf *);
327	struct mbuf * ip_reass (PNATState, register struct mbuf *);
328	void ip_freef (PNATState, struct ipqhead , struct ipq_t );
329	void ip_slowtimo (PNATState);
330	void ip_stripoptions (register struct mbuf , struct mbuf );
331
332	/* ip_output.c */
333	int ip_output (PNATState, struct socket , struct mbuf );
334	int ip_output0 (PNATState, struct socket , struct mbuf , int urg);
335
336	/* tcp_input.c */
337	int tcp_reass (PNATState, struct tcpcb , struct tcphdr , int , struct mbuf );
338	void tcp_input (PNATState, register struct mbuf , int, struct socket );
339	void tcp_fconnect_failed(PNATState, struct socket *, int);
340	void tcp_dooptions (PNATState, struct tcpcb , u_char , int, struct tcpiphdr *);
341	void tcp_xmit_timer (PNATState, register struct tcpcb *, int);
342	int tcp_mss (PNATState, register struct tcpcb *, u_int);
343
344	/* tcp_output.c */
345	int tcp_output (PNATState, register struct tcpcb *);
346	void tcp_setpersist (register struct tcpcb *);
347
348	/* tcp_subr.c */
349	void tcp_init (PNATState);
350	void tcp_template (struct tcpcb *);
351	void tcp_respond (PNATState, struct tcpcb , register struct tcpiphdr , register struct mbuf *, tcp_seq, tcp_seq, int);
352	struct tcpcb * tcp_newtcpcb (PNATState, struct socket *);
353	struct tcpcb * tcp_close (PNATState, register struct tcpcb *);
354	void tcp_drain (void);
355	void tcp_sockclosed (PNATState, struct tcpcb *);
356	int tcp_fconnect (PNATState, struct socket *);
357	void tcp_connect (PNATState, struct socket *);
358	int tcp_attach (PNATState, struct socket *);
359	u_int8_t tcp_tos (struct socket *);
360	int tcp_ctl (PNATState, struct socket *);
361	struct tcpcb tcp_drop(PNATState, struct tcpcb tp, int err);
362
363	/* hostres.c */
364	struct mbuf hostresolver(PNATState, struct mbuf , uint32_t src, uint16_t sport);
365
366	/slirp.c/
367	void slirp_arp_who_has(PNATState pData, uint32_t dst);
368	int slirp_arp_cache_update_or_add(PNATState pData, uint32_t dst, const uint8_t *mac);
369	int slirp_init_dns_list(PNATState pData);
370	void slirp_release_dns_list(PNATState pData);
371	#define MIN_MRU 128
372	#define MAX_MRU 16384
373
374	#ifndef RT_OS_WINDOWS
375	# define min(x, y) ((x) < (y) ? (x) : (y))
376	# define max(x, y) ((x) > (y) ? (x) : (y))
377	#endif
378
379	#ifdef RT_OS_WINDOWS
380	# undef errno
381	# if 0 /* debugging */
382	int errno_func(const char *file, int line);
383	# define errno (errno_func(__FILE__, __LINE__))
384	# else
385	# define errno (WSAGetLastError())
386	# endif
387	#endif
388
389	# define ETH_ALEN 6
390	# define ETH_HLEN 14
391
392	struct ethhdr
393	{
394	unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
395	unsigned char h_source[ETH_ALEN]; /* source ether addr */
396	unsigned short h_proto; /* packet type ID field */
397	};
398	AssertCompileSize(struct ethhdr, 14);
399
400	/*
401	* (vvl) externing of sscanf.
402	*/
403	int sscanf(const char s, const char format, ...);
404
405	#if defined(VBOX_SLIRP_ALIAS) \|\| defined(VBOX_SLIRP_BSD)
406
407	# define ip_next(ip) (void )((uint8_t )(ip) + ((ip)->ip_hl << 2))
408	# define udp_next(udp) (void )((uint8_t )&((struct udphdr *)(udp))[1])
409	# undef bcopy
410	# define bcopy(src, dst, len) memcpy((dst), (src), (len))
411	# undef bcmp
412	# define bcmp(a1, a2, len) memcmp((a1), (a2), (len))
413	# define NO_FW_PUNCH
414	/* Two wrongs don't make a right, but this at least averts harm. */
415	# define NO_USE_SOCKETS
416
417	# ifdef alias_addr
418	# ifndef VBOX_SLIRP_BSD
419	# error alias_addr has already defined!!!
420	# else
421	# undef alias_addr
422	# endif
423	# endif
424
425	# define arc4random() RTRandU32()
426	# undef malloc
427	# undef calloc
428	# undef free
429	# define malloc(x) RTMemAlloc((x))
430	# define calloc(x, n) RTMemAllocZ((x)*(n))
431	# define free(x) RTMemFree((x))
432	# ifndef __unused
433	# define __unused
434	# endif
435
436	# define strncasecmp RTStrNICmp
437	# define stderr NULL
438	# define stdout NULL
439
440	# ifdef VBOX_WITH_DEBUG_LIBALIAS
441	# define LIBALIAS_DEBUG
442	# endif
443
444	# define fflush(x) do{} while(0)
445	# include "ext.h"
446	#endif /VBOX_SLIRP_ALIAS/
447
448	/**
449	* @todo might be useful to make it configurable, especially in terms of Intnet behind NAT
450	*/
451	# define maxusers 32
452	# define max_protohdr 0
453	/**
454	* @todo (vvl) for now ignore these values, later perhaps initialize tuning parameters
455	*/
456	# define TUNABLE_INT_FETCH(name, pval) do { } while (0)
457	# define SYSCTL_PROC(a0, a1, a2, a3, a4, a5, a6, a7, a8) const int dummy_ ## a6 = 0
458	# define SYSCTL_STRUCT(a0, a1, a2, a3, a4, a5, a6) const int dummy_ ## a5 = 0
459	# define SYSINIT(a0, a1, a2, a3, a4) const int dummy_ ## a3 = 0
460	# define sysctl_handle_int(a0, a1, a2, a3) 0
461	# define EVENTHANDLER_INVOKE(a) do{}while(0)
462	# define EVENTHANDLER_REGISTER(a0, a1, a2, a3) do{}while(0)
463	# define KASSERT AssertMsg
464
465	struct dummy_req
466	{
467	void *newptr;
468	};
469
470	#define SYSCTL_HANDLER_ARGS PNATState pData, void oidp, struct dummy_req req
471
472	void mbuf_init(void *);
473	# define cksum(m, len) in_cksum_skip((m), (len), 0)
474
475	int ftp_alias_load(PNATState);
476	int ftp_alias_unload(PNATState);
477	int nbt_alias_load(PNATState);
478	int nbt_alias_unload(PNATState);
479	int slirp_arp_lookup_ip_by_ether(PNATState, const uint8_t , uint32_t );
480	int slirp_arp_lookup_ether_by_ip(PNATState, uint32_t, uint8_t *);
481
482	DECLINLINE(unsigned) slirp_size(PNATState pData)
483	{
484	if (if_mtu < MSIZE)
485	return MCLBYTES;
486	else if (if_mtu < MCLBYTES)
487	return MCLBYTES;
488	else if (if_mtu < MJUM9BYTES)
489	return MJUM9BYTES;
490	else if (if_mtu < MJUM16BYTES)
491	return MJUM16BYTES;
492	else
493	AssertMsgFailed(("Unsupported size"));
494	return 0;
495	}
496
497	static inline bool slirpMbufTagService(PNATState pData, struct mbuf *m, uint8_t u8ServiceId)
498	{
499	struct m_tag * t = NULL;
500	NOREF(pData);
501	/* if_encap assumes that all packets goes through aliased address(gw) */
502	if (u8ServiceId == CTL_ALIAS)
503	return true;
504	t = m_tag_get(PACKET_SERVICE, sizeof(uint8_t), 0);
505	if (!t)
506	return false;
507	(uint8_t )&t[1] = u8ServiceId;
508	m_tag_prepend(m, t);
509	return true;
510	}
511
512	/**
513	* This function tags mbuf allocated for special services.
514	* @todo: add service id verification.
515	*/
516	static inline struct mbuf *slirpServiceMbufAlloc(PNATState pData, uint8_t u8ServiceId)
517	{
518	struct mbuf *m = NULL;
519	m = m_getcl(pData, M_DONTWAIT, MT_HEADER, M_PKTHDR);
520	if (!m)
521	return m;
522	if(!slirpMbufTagService(pData, m, u8ServiceId))
523	{
524	m_freem(pData, m);
525	return NULL;
526	}
527	return m;
528	}
529
530	static inline struct mbuf *slirpDnsMbufAlloc(PNATState pData)
531	{
532	return slirpServiceMbufAlloc(pData, CTL_DNS);
533	}
534
535	DECLINLINE(bool) slirpIsWideCasting(PNATState pData, uint32_t u32Addr)
536	{
537	bool fWideCasting;
538	LogFlowFunc(("Enter: u32Addr:%RTnaipv4\n", u32Addr));
539	fWideCasting = ( u32Addr == INADDR_BROADCAST
540	\|\| (u32Addr & RT_H2N_U32_C(~pData->netmask)) == RT_H2N_U32_C(~pData->netmask));
541	LogFlowFunc(("Leave: %RTbool\n", fWideCasting));
542	return fWideCasting;
543	}
544	#endif
545

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source: vbox/trunk/src/VBox/Devices/Network/slirp/slirp.h@ 91942

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