[ViewVC] Diff of: cvs/gvpe/src/connection.C

Comparing gvpe/src/connection.C (file contents):
Revision 1.80 by pcg, Fri Aug 15 18:11:14 2008 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
5	This file is part of GVPE.	5	This file is part of GVPE.
6		6
7	GVPE is free software; you can redistribute it and/or modify it	7	GVPE is free software; you can redistribute it and/or modify it
8	under the terms of the GNU General Public License as published by the	8	under the terms of the GNU General Public License as published by the
43	#include "conf.h"	43	#include "conf.h"
44	#include "slog.h"	44	#include "slog.h"
45	#include "device.h"	45	#include "device.h"
46	#include "vpn.h"	46	#include "vpn.h"
47	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
48		49
49	#include "netcompat.h"	50	#include "netcompat.h"
50		51
51	#if !HAVE_RAND_PSEUDO_BYTES
52	# define RAND_pseudo_bytes RAND_bytes
53	#endif
54
55	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	52	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
56		53
57	#define ULTRA_FAST 1	54	#define ULTRA_FAST 1
58	#define HLOG 15	55	#define HLOG 15
59	#include "lzf/lzf.h"	56	#include "lzf/lzf.h"
60	#include "lzf/lzf_c.c"	57	#include "lzf/lzf_c.c"
…		…
63	//////////////////////////////////////////////////////////////////////////////	60	//////////////////////////////////////////////////////////////////////////////
64		61
65	static std::queue< std::pair<run_script_cb , const char > > rs_queue;	62	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
66	static ev::child rs_child_ev;	63	static ev::child rs_child_ev;
67		64
		65	namespace
		66	{
68	void // c++ requires external linkage here, apparently :(	67	void // c++ requires external linkage here, apparently :(
69	rs_child_cb (ev::child &w, int revents)	68	rs_child_cb (ev::child &w, int revents)
70	{	69	{
71	w.stop ();	70	w.stop ();
72		71
73	if (rs_queue.empty ())	72	if (rs_queue.empty ())
74	return;	73	return;
75		74
76	pid_t pid = run_script (*rs_queue.front ().first, false);	75	pid_t pid = run_script (*rs_queue.front ().first, false);
77	if (pid)	76	if (pid)
78	{	77	{
79	w.set (pid);	78	w.set (pid);
80	w.start ();	79	w.start ();
81	}	80	}
82	else	81	else
83	slog (L_WARN, rs_queue.front ().second);	82	slog (L_WARN, rs_queue.front ().second);
84		83
85	delete rs_queue.front ().first;	84	delete rs_queue.front ().first;
86	rs_queue.pop ();	85	rs_queue.pop ();
87	}	86	}
		87	};
88		88
89	// despite the fancy name, this is quite a hack	89	// despite the fancy name, this is quite a hack
90	static void	90	static void
91	run_script_queued (run_script_cb cb, const char warnmsg)	91	run_script_queued (run_script_cb cb, const char warnmsg)
92	{	92	{
…		…
104	struct crypto_ctx	104	struct crypto_ctx
105	{	105	{
106	EVP_CIPHER_CTX cctx;	106	EVP_CIPHER_CTX cctx;
107	HMAC_CTX hctx;	107	HMAC_CTX hctx;
108		108
109	crypto_ctx (const rsachallenge &challenge, int enc);	109	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
110	~crypto_ctx ();	110	~crypto_ctx ();
111	};	111	};
112		112
113	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	113	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
114	{	114	{
		115	ecdh_key s;
		116
		117	curve25519_combine (a, b, s);
		118
		119	{
		120	u8 mac_key[MAC_KEYSIZE];
		121	static const unsigned char mac_info[] = "gvpe mac key";
		122
		123	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		124	kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		125	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		126	kdf.extract (s, sizeof (s));
		127	kdf.extract_done (HKDF_PRF_HASH ());
		128	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		129
		130	HMAC_CTX_init (&hctx);
		131	require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		132	}
		133
		134	{
		135	u8 cipher_key[CIPHER_KEYSIZE];
		136	static const unsigned char cipher_info[] = "gvpe cipher key";
		137
		138	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		139	kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		140	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		141	kdf.extract (s, sizeof (s));
		142	kdf.extract_done (HKDF_PRF_HASH ());
		143	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		144
115	EVP_CIPHER_CTX_init (&cctx);	145	EVP_CIPHER_CTX_init (&cctx);
116	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	146	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
117	HMAC_CTX_init (&hctx);	147	}
118	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
119	}	148	}
120		149
121	crypto_ctx::~crypto_ctx ()	150	crypto_ctx::~crypto_ctx ()
122	{	151	{
123	require (EVP_CIPHER_CTX_cleanup (&cctx));	152	require (EVP_CIPHER_CTX_cleanup (&cctx));
124	HMAC_CTX_cleanup (&hctx);	153	HMAC_CTX_cleanup (&hctx);
125	}	154	}
126		155
		156	static inline void
		157	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		158	{
		159	if (RSA_public_encrypt (sizeof (auth.rsa),
		160	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		161	key, RSA_PKCS1_OAEP_PADDING) < 0)
		162	fatal ("RSA_public_encrypt error");
		163
		164	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		165	}
		166
		167	static inline bool
		168	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		169	{
		170	u8 rsa_decrypt[RSA_KEYLEN];
		171
		172	if (RSA_private_decrypt (sizeof (encr.rsa),
		173	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		174	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		175	return 0;
		176
		177	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		178	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		179
		180	return 1;
		181	}
		182
127	static void	183	static void
128	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	184	auth_hash (const auth_data &auth, auth_mac &mac)
129	{	185	{
130	EVP_MD_CTX ctx;	186	HMAC_CTX ctx;
131		187
132	EVP_MD_CTX_init (&ctx);	188	HMAC_CTX_init (&ctx);
133	require (EVP_DigestInit (&ctx, RSA_HASH));	189	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
134	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));	190	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
135	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
136	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	191	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
137	EVP_MD_CTX_cleanup (&ctx);	192	HMAC_CTX_cleanup (&ctx);
138	}	193	}
139		194
140	struct rsa_entry	195	void
		196	connection::generate_auth_data ()
141	{	197	{
142	tstamp expire;	198	if (auth_expire < ev_now ())
143	rsaid id;
144	rsachallenge chg;
145	};
146
147	struct rsa_cache : list<rsa_entry>
148	{
149	inline void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;
150
151	bool find (const rsaid &id, rsachallenge &chg)
152	{
153	for (iterator i = begin (); i != end (); ++i)
154	{	199	{
155	if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev_now ())	200	// request data
156	{	201	RAND_bytes ((unsigned char *)&snd_auth.rsa, sizeof snd_auth.rsa);
157	memcpy (&chg, &i->chg, sizeof chg);	202	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
		203	auth_hash (snd_auth, snd_auth_mac);
158		204
159	erase (i);	205	// eventual response data
160	return true;	206	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
161	}
162	}	207	}
163		208
164	if (!cleaner.is_active ())	209	// every use prolongs the expiry
165	cleaner.again ();
166
167	return false;
168	}
169
170	void gen (rsaid &id, rsachallenge &chg)
171	{
172	rsa_entry e;
173
174	RAND_bytes ((unsigned char *)&id, sizeof id);
175	RAND_bytes ((unsigned char *)&chg, sizeof chg);
176
177	e.expire = ev_now () + RSA_TTL;	210	auth_expire = ev_now () + AUTH_TTL;
178	e.id = id;
179	memcpy (&e.chg, &chg, sizeof chg);
180
181	push_back (e);
182
183	if (!cleaner.is_active ())
184	cleaner.again ();
185	}
186
187	rsa_cache ()
188	{
189	cleaner.set<rsa_cache, &rsa_cache::cleaner_cb> (this);
190	cleaner.set (RSA_TTL, RSA_TTL);
191	}
192
193	} rsa_cache;
194
195	void rsa_cache::cleaner_cb (ev::timer &w, int revents)
196	{
197	if (empty ())
198	w.stop ();
199	else
200	{
201	for (iterator i = begin (); i != end (); )
202	if (i->expire <= ev_now ())
203	i = erase (i);
204	else
205	++i;
206	}
207	}	211	}
208		212
209	//////////////////////////////////////////////////////////////////////////////	213	//////////////////////////////////////////////////////////////////////////////
210		214
211	pkt_queue::pkt_queue (double max_ttl, int max_queue)	215	pkt_queue::pkt_queue (double max_ttl, int max_queue)
…		…
225	delete p;	229	delete p;
226		230
227	delete [] queue;	231	delete [] queue;
228	}	232	}
229		233
		234	void
230	void pkt_queue::expire_cb (ev::timer &w, int revents)	235	pkt_queue::expire_cb (ev::timer &w, int revents)
231	{	236	{
232	ev_tstamp expire = ev_now () - max_ttl;	237	ev_tstamp expire = ev_now () - max_ttl;
233		238
234	for (;;)	239	for (;;)
235	{	240	{
…		…
246		251
247	delete get ();	252	delete get ();
248	}	253	}
249	}	254	}
250		255
		256	void
251	void pkt_queue::put (net_packet *p)	257	pkt_queue::put (net_packet *p)
252	{	258	{
253	ev_tstamp now = ev_now ();	259	ev_tstamp now = ev_now ();
254		260
255	// start expiry timer	261	// start expiry timer
256	if (empty ())	262	if (empty ())
…		…
265	queue[i].tstamp = now;	271	queue[i].tstamp = now;
266		272
267	i = ni;	273	i = ni;
268	}	274	}
269		275
270	net_packet *pkt_queue::get ()	276	net_packet *
		277	pkt_queue::get ()
271	{	278	{
272	if (empty ())	279	if (empty ())
273	return 0;	280	return 0;
274		281
275	net_packet *p = queue[j].pkt;	282	net_packet *p = queue[j].pkt;
…		…
299		306
300	bool can (const sockinfo &si) { return can((u32)si.host); }	307	bool can (const sockinfo &si) { return can((u32)si.host); }
301	bool can (u32 host);	308	bool can (u32 host);
302	};	309	};
303		310
304	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	311	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
305		312
		313	bool
306	bool net_rate_limiter::can (u32 host)	314	net_rate_limiter::can (u32 host)
307	{	315	{
308	iterator i;	316	iterator i;
309		317
310	for (i = begin (); i != end (); )	318	for (i = begin (); i != end (); )
311	if (i->host == host)	319	if (i->host == host)
…		…
358		366
359	/////////////////////////////////////////////////////////////////////////////	367	/////////////////////////////////////////////////////////////////////////////
360		368
361	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	369	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
362		370
		371	void
363	void hmac_packet::hmac_gen (crypto_ctx *ctx)	372	hmac_packet::hmac_gen (crypto_ctx *ctx)
364	{	373	{
365	unsigned int xlen;	374	unsigned int xlen;
366		375
367	HMAC_CTX *hctx = &ctx->hctx;	376	HMAC_CTX *hctx = &ctx->hctx;
368		377
369	HMAC_Init_ex (hctx, 0, 0, 0, 0);	378	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
370	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	379	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
371	len - sizeof (hmac_packet));	380	len - sizeof (hmac_packet)));
372	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	381	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
373	}	382	}
374		383
375	void	384	void
376	hmac_packet::hmac_set (crypto_ctx *ctx)	385	hmac_packet::hmac_set (crypto_ctx *ctx)
377	{	386	{
…		…
386	hmac_gen (ctx);	395	hmac_gen (ctx);
387		396
388	return !memcmp (hmac, hmac_digest, HMACLENGTH);	397	return !memcmp (hmac, hmac_digest, HMACLENGTH);
389	}	398	}
390		399
		400	void
391	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	401	vpn_packet::set_hdr (ptype type_, unsigned int dst)
392	{	402	{
393	type = type_;	403	type = type_;
394		404
395	int src = THISNODE->id;	405	int src = THISNODE->id;
396		406
…		…
401		411
402	#define MAXVPNDATA (MAX_MTU - 6 - 6)	412	#define MAXVPNDATA (MAX_MTU - 6 - 6)
403	#define DATAHDR (sizeof (u32) + RAND_SIZE)	413	#define DATAHDR (sizeof (u32) + RAND_SIZE)
404		414
405	struct vpndata_packet : vpn_packet	415	struct vpndata_packet : vpn_packet
		416	{
		417	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		418
		419	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		420	tap_packet unpack (connection conn, u32 &seqno);
		421
		422	private:
		423	const u32 data_hdr_size () const
406	{	424	{
407	u8 data[MAXVPNDATA + DATAHDR]; // seqno
408
409	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
410	tap_packet unpack (connection conn, u32 &seqno);
411	private:
412
413	const u32 data_hdr_size () const
414	{
415	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	425	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
416	}
417	};	426	}
		427	};
418		428
419	void	429	void
420	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	430	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
421	{	431	{
422	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	432	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
424	ptype type = PT_DATA_UNCOMPRESSED;	434	ptype type = PT_DATA_UNCOMPRESSED;
425		435
426	#if ENABLE_COMPRESSION	436	#if ENABLE_COMPRESSION
427	u8 cdata[MAX_MTU];	437	u8 cdata[MAX_MTU];
428		438
429	if (conn->features & ENABLE_COMPRESSION)	439	if (conn->features & FEATURE_COMPRESSION)
430	{	440	{
431	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	441	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
432		442
433	if (cl)	443	if (cl)
434	{	444	{
…		…
440	d[1] = cl;	450	d[1] = cl;
441	}	451	}
442	}	452	}
443	#endif	453	#endif
444		454
445	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	455	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
446		456
447	struct {	457	struct {
448	#if RAND_SIZE	458	#if RAND_SIZE
449	u8 rnd[RAND_SIZE];	459	u8 rnd[RAND_SIZE];
450	#endif	460	#endif
451	u32 seqno;	461	u32 seqno;
452	} datahdr;	462	} datahdr;
453		463
454	datahdr.seqno = ntohl (seqno);	464	datahdr.seqno = ntohl (seqno);
455	#if RAND_SIZE	465	#if RAND_SIZE
456	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	466	RAND_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);
457	#endif	467	#endif
458		468
459	require (EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
460	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
461	(unsigned char *) &datahdr, DATAHDR));	471	(unsigned char *) &datahdr, DATAHDR));
…		…
483	int outl = 0, outl2;	493	int outl = 0, outl2;
484	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
485	u8 *d;	495	u8 *d;
486	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
487		497
488	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
489		499
490	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
491	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
492		502
493	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
…		…
535	}	545	}
536	};	546	};
537		547
538	struct config_packet : vpn_packet	548	struct config_packet : vpn_packet
539	{	549	{
540	// actually, hmaclen cannot be checked because the hmac
541	// field comes before this data, so peers with other
542	// hmacs simply will not work.
543	u8 prot_major, prot_minor, randsize, hmaclen;	550	u8 prot_major, prot_minor, randsize;
544	u8 flags, challengelen, features, pad3;	551	u8 flags, features, pad6, pad7, pad8;
545	u32 cipher_nid, digest_nid, hmac_nid;	552	u32 cipher_nid, mac_nid, auth_nid;
546		553
547	void setup (ptype type, int dst);	554	void setup (ptype type, int dst);
548	bool chk_config () const;	555	bool chk_config () const;
549		556
550	static u8 get_features ()	557	static u8 get_features ()
…		…
561	#endif	568	#endif
562	return f;	569	return f;
563	}	570	}
564	};	571	};
565		572
		573	void
566	void config_packet::setup (ptype type, int dst)	574	config_packet::setup (ptype type, int dst)
567	{	575	{
568	prot_major = PROTOCOL_MAJOR;	576	prot_major = PROTOCOL_MAJOR;
569	prot_minor = PROTOCOL_MINOR;	577	prot_minor = PROTOCOL_MINOR;
570	randsize = RAND_SIZE;	578	randsize = RAND_SIZE;
571	hmaclen = HMACLENGTH;
572	flags = 0;	579	flags = 0;
573	challengelen = sizeof (rsachallenge);
574	features = get_features ();	580	features = get_features ();
575		581
576	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	582	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
577	digest_nid = htonl (EVP_MD_type (RSA_HASH));
578	hmac_nid = htonl (EVP_MD_type (DIGEST));	583	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		584	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
579		585
580	len = sizeof (*this) - sizeof (net_packet);	586	len = sizeof (*this) - sizeof (net_packet);
581	set_hdr (type, dst);	587	set_hdr (type, dst);
582	}	588	}
583		589
		590	bool
584	bool config_packet::chk_config () const	591	config_packet::chk_config () const
585	{	592	{
586	if (prot_major != PROTOCOL_MAJOR)	593	if (prot_major != PROTOCOL_MAJOR)
587	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	594	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
588	else if (randsize != RAND_SIZE)	595	else if (randsize != RAND_SIZE)
589	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	596	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
590	else if (hmaclen != HMACLENGTH)
591	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
592	else if (challengelen != sizeof (rsachallenge))
593	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
594	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	597	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
595	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	598	slog (L_WARN, _("cipher algo mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
596	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
597	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
598	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	599	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
599	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	600	slog (L_WARN, _("mac algo mismatch (remote %x <=> local %x)"), ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		601	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		602	slog (L_WARN, _("auth algo mismatch (remote %x <=> local %x)"), ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
600	else	603	else
601	return true;	604	return true;
602		605
603	return false;	606	return false;
604	}	607	}
605		608
606	struct auth_req_packet : config_packet	609	struct auth_req_packet : config_packet // UNPROTECTED
607	{	610	{
608	char magic[8];	611	char magic[8];
609	u8 initiate; // false if this is just an automatic reply	612	u8 initiate; // false if this is just an automatic reply
610	u8 protocols; // supported protocols (will be patched on forward)	613	u8 protocols; // supported protocols (will be patched on forward)
611	u8 pad2, pad3;	614	u8 pad2, pad3;
612	rsaid id;	615	auth_encr encr;
613	rsaencrdata encr;
614		616
615	auth_req_packet (int dst, bool initiate_, u8 protocols_)	617	auth_req_packet (int dst, bool initiate_, u8 protocols_)
616	{	618	{
617	config_packet::setup (PT_AUTH_REQ, dst);	619	config_packet::setup (PT_AUTH_REQ, dst);
618	strncpy (magic, MAGIC, 8);	620	memcpy (magic, MAGIC, 8);
619	initiate = !!initiate_;	621	initiate = !!initiate_;
620	protocols = protocols_;	622	protocols = protocols_;
621		623
622	len = sizeof (*this) - sizeof (net_packet);	624	len = sizeof (*this) - sizeof (net_packet);
623	}	625	}
624	};	626	};
625		627
626	struct auth_res_packet : config_packet	628	struct auth_res_packet : config_packet // UNPROTECTED
627	{	629	{
628	rsaid id;
629	u8 pad1, pad2, pad3;
630	u8 response_len; // encrypted length
631	rsaresponse response;	630	auth_response response;
632		631
633	auth_res_packet (int dst)	632	auth_res_packet (int dst)
634	{	633	{
635	config_packet::setup (PT_AUTH_RES, dst);	634	config_packet::setup (PT_AUTH_RES, dst);
636		635
…		…
670	};	669	};
671		670
672	/////////////////////////////////////////////////////////////////////////////	671	/////////////////////////////////////////////////////////////////////////////
673		672
674	void	673	void
675	connection::connection_established ()	674	connection::connection_established (const sockinfo &rsi)
676	{	675	{
677	slog (L_NOISE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);	676	if (!have_snd_auth \|\| !have_rcv_auth)
		677	return;
		678
		679	si = rsi;
		680	protocol = rsi.prot;
		681
		682	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		683	conf->nodename, (const char *)rsi,
		684	is_direct ? "direct" : "forwarded",
		685	PROTOCOL_MAJOR, prot_minor);
		686
		687	if (::conf.script_node_up)
		688	{
		689	run_script_cb *cb = new run_script_cb;
		690	cb->set<connection, &connection::script_node_up> (this);
		691	run_script_queued (cb, _("node-up command execution failed, continuing."));
		692	}
		693
		694	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		695	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		696
		697	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		698	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
678		699
679	if (ictx && octx)	700	if (ictx && octx)
680	{	701	{
681	// make sure rekeying timeouts are slightly asymmetric	702	// make sure rekeying timeouts are slightly asymmetric
682	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);	703	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
683	rekey.start (rekey_interval, rekey_interval);	704	rekey.start (rekey_interval, rekey_interval);
		705
684	keepalive.start (::conf.keepalive);	706	keepalive.start (::conf.keepalive);
685		707
686	// send queued packets	708	// send queued packets
687	if (ictx && octx)	709	if (ictx && octx)
688	{	710	{
…		…
699	}	721	}
700	}	722	}
701		723
702	vpn->connection_established (this);	724	vpn->connection_established (this);
703	}	725	}
		726	#if 0
704	else	727	else
705	{	728	{
706	retry_cnt = 0;	729	retry_cnt = 0;
707	establish_connection.start (5);	730	establish_connection.start (5);
708	keepalive.stop ();	731	keepalive.stop ();
709	rekey.stop ();	732	rekey.stop ();
710	}	733	}
		734	#endif
711	}	735	}
712		736
713	void	737	void
714	connection::reset_si ()	738	connection::reset_si ()
715	{	739	{
…		…
761	ping_packet *pkt = new ping_packet;	785	ping_packet *pkt = new ping_packet;
762		786
763	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	787	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
764		788
765	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);	789	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
766
767	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	790	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
768		791
769	delete pkt;	792	delete pkt;
770	}	793	}
771		794
…		…
786	void	809	void
787	connection::send_auth_request (const sockinfo &si, bool initiate)	810	connection::send_auth_request (const sockinfo &si, bool initiate)
788	{	811	{
789	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	812	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
790		813
791	rsachallenge chg;	814	generate_auth_data ();
792	rsa_cache.gen (pkt->id, chg);
793	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	815	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
794		816
795	slog (L_TRACE, "%s >> PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);	817	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
796
797	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	818	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
798		819
799	delete pkt;	820	delete pkt;
800	}	821	}
801		822
802	void	823	void
803	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	824	connection::send_auth_response (const sockinfo &si)
804	{	825	{
805	auth_res_packet *pkt = new auth_res_packet (conf->id);	826	auth_res_packet *pkt = new auth_res_packet (conf->id);
806		827
807	pkt->id = id;	828	auth_hash (rcv_auth, pkt->response.mac);
808		829	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
809	rsa_hash (id, chg, pkt->response);
810
811	pkt->hmac_set (octx);
812		830
813	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);	831	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
814
815	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	832	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
816		833
817	delete pkt;	834	delete pkt;
818	}	835	}
819		836
820	void	837	void
821	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	838	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
822	{	839	{
823	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s)", conf->nodename,	840	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
824	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi);	841	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		842	conf->protocols);
825		843
826	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	844	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
827		845
828	r->hmac_set (octx);	846	r->hmac_set (octx);
829	send_vpn_packet (r, si);	847	send_vpn_packet (r, si);
…		…
832	}	850	}
833		851
834	inline void	852	inline void
835	connection::establish_connection_cb (ev::timer &w, int revents)	853	connection::establish_connection_cb (ev::timer &w, int revents)
836	{	854	{
837	if (!ictx	855	if (!(ictx && octx)
838	&& conf != THISNODE	856	&& conf != THISNODE
839	&& connectmode != conf_node::C_NEVER	857	&& connectmode != conf_node::C_NEVER
840	&& connectmode != conf_node::C_DISABLED	858	&& connectmode != conf_node::C_DISABLED
841	&& !w.is_active ())	859	&& !w.is_active ())
842	{	860	{
…		…
910	}	928	}
911	}	929	}
912		930
913	delete ictx; ictx = 0;	931	delete ictx; ictx = 0;
914	delete octx; octx = 0;	932	delete octx; octx = 0;
915	#if ENABLE_DNS
916	dnsv4_reset_connection ();
917	#endif
918		933
919	si.host = 0;	934	si.host = 0;
		935
		936	have_snd_auth = false;
		937	have_rcv_auth = false;
		938	auth_expire = 0.;
920		939
921	last_activity = 0.;	940	last_activity = 0.;
922	//last_si_change = 0.;	941	//last_si_change = 0.;
923	retry_cnt = 0;	942	retry_cnt = 0;
924		943
…		…
983	data_queue.put (new tap_packet (*pkt));	1002	data_queue.put (new tap_packet (*pkt));
984	post_inject_queue ();	1003	post_inject_queue ();
985	}	1004	}
986	}	1005	}
987		1006
		1007	void
988	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1008	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
989	{	1009	{
990	if (ictx && octx)	1010	if (ictx && octx)
991	send_vpn_packet (pkt, si, tos);	1011	send_vpn_packet (pkt, si, tos);
992	else	1012	else
993	{	1013	{
…		…
999	void	1019	void
1000	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1020	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
1001	{	1021	{
1002	last_activity = ev_now ();	1022	last_activity = ev_now ();
1003		1023
1004	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",	1024	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
1005	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());	1025	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
1006		1026
1007	if (connectmode == conf_node::C_DISABLED)	1027	if (connectmode == conf_node::C_DISABLED)
1008	return;	1028	return;
1009		1029
…		…
1019	{	1039	{
1020	if (auth_rate_limiter.can (rsi))	1040	if (auth_rate_limiter.can (rsi))
1021	send_auth_request (rsi, true);	1041	send_auth_request (rsi, true);
1022	}	1042	}
1023	else	1043	else
1024	// we would love to change thre socket address here, but ping's aren't	1044	// we would love to change the socket address here, but ping's aren't
1025	// authenticated, so we best ignore it.	1045	// authenticated, so we best ignore it.
1026	send_ping (rsi, 1); // pong	1046	send_ping (rsi, 1); // pong
1027		1047
1028	break;	1048	break;
1029		1049
1030	case vpn_packet::PT_PONG:	1050	case vpn_packet::PT_PONG:
1031	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);	1051	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1052
		1053	// a PONG might mean that the other side doesn't really know
		1054	// about our desire for communication.
		1055	establish_connection ();
1032	break;	1056	break;
1033		1057
1034	case vpn_packet::PT_RESET:	1058	case vpn_packet::PT_RESET:
1035	{	1059	{
1036	reset_connection ();	1060	reset_connection ();
…		…
1049	break;	1073	break;
1050		1074
1051	case vpn_packet::PT_AUTH_REQ:	1075	case vpn_packet::PT_AUTH_REQ:
1052	if (auth_rate_limiter.can (rsi))	1076	if (auth_rate_limiter.can (rsi))
1053	{	1077	{
1054	auth_req_packet p = (auth_req_packet ) pkt;	1078	auth_req_packet p = (auth_req_packet )pkt;
1055		1079
1056	slog (L_TRACE, "%s << PT_AUTH_REQ(%s)", conf->nodename, p->initiate ? "initiate" : "reply");	1080	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1081	conf->nodename, p->initiate ? "initiate" : "reply",
		1082	p->protocols, p->features);
1057		1083
1058	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1084	if (p->chk_config () && !memcmp (p->magic, MAGIC, 8))
1059	{	1085	{
1060	if (p->prot_minor != PROTOCOL_MINOR)	1086	if (p->prot_minor != PROTOCOL_MINOR)
1061	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1087	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
1062	conf->nodename, (const char *)rsi,	1088	conf->nodename, (const char *)rsi,
1063	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1089	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
1064		1090
1065	if (p->initiate)	1091	if (p->initiate)
1066	send_auth_request (rsi, false);	1092	send_auth_request (rsi, false);
1067		1093
1068	rsachallenge k;	1094	auth_data auth;
1069		1095
1070	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1096	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
1071	{	1097	{
1072	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1098	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
1073	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1099	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
1074	break;
1075	}	1100	}
1076	else	1101	else
1077	{	1102	{
1078	delete octx;	1103	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
1079		1104
1080	octx = new crypto_ctx (k, 1);	1105	rcv_auth = auth;
1081	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1106	have_rcv_auth = true;
1082		1107
		1108	send_auth_response (rsi);
		1109
		1110	if (chg)
		1111	{
1083	conf->protocols = p->protocols;	1112	conf->protocols = p->protocols;
1084	features = p->features & config_packet::get_features ();	1113	features = p->features & config_packet::get_features ();
1085		1114
1086	send_auth_response (rsi, p->id, k);
1087
1088	connection_established ();	1115	connection_established (rsi);
1089
1090	break;	1116	}
1091	}	1117	}
		1118
		1119	break;
1092	}	1120	}
1093	else	1121	else
1094	slog (L_WARN, _("%s(%s): protocol mismatch."),	1122	slog (L_WARN, _("%s(%s): protocol mismatch."),
1095	conf->nodename, (const char *)rsi);	1123	conf->nodename, (const char *)rsi);
1096		1124
…		…
1101		1129
1102	case vpn_packet::PT_AUTH_RES:	1130	case vpn_packet::PT_AUTH_RES:
1103	{	1131	{
1104	auth_res_packet p = (auth_res_packet )pkt;	1132	auth_res_packet p = (auth_res_packet )pkt;
1105		1133
1106	slog (L_TRACE, "%s << PT_AUTH_RES", conf->nodename);	1134	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
1107		1135
1108	if (p->chk_config ())	1136	if (p->chk_config ())
1109	{	1137	{
1110	if (p->prot_minor != PROTOCOL_MINOR)	1138	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
1111	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
1112	conf->nodename, (const char *)rsi,
1113	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
1114
1115	rsachallenge chg;
1116
1117	if (!rsa_cache.find (p->id, chg))
1118	{	1139	{
1119	slog (L_ERR, _("%s(%s): unrequested auth response, ignoring."),	1140	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
1120	conf->nodename, (const char *)rsi);	1141	conf->nodename, (const char *)rsi);
1121	break;
1122	}	1142	}
1123	else	1143	else if (!have_snd_auth)
1124	{	1144	{
1125	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1145	if (p->prot_minor != PROTOCOL_MINOR)
1126		1146	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
1127	if (!p->hmac_chk (cctx))
1128	{
1129	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1130	"could be an attack, or just corruption or a synchronization error."),
1131	conf->nodename, (const char *)rsi);	1147	conf->nodename, (const char *)rsi,
1132	break;	1148	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
1133	}
1134	else
1135	{
1136	rsaresponse h;
1137		1149
1138	rsa_hash (p->id, chg, h);
1139
1140	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1141	{
1142	prot_minor = p->prot_minor;	1150	prot_minor = p->prot_minor;
		1151	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
1143		1152
1144	delete ictx; ictx = cctx;	1153	have_snd_auth = true;
1145
1146	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1147
1148	si = rsi;
1149	protocol = rsi.prot;
1150
1151	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
1152	conf->nodename, (const char *)rsi,
1153	is_direct ? "direct" : "routed",
1154	p->prot_major, p->prot_minor);
1155
1156	connection_established ();	1154	connection_established (rsi);
1157
1158	if (::conf.script_node_up)
1159	{
1160	run_script_cb *cb = new run_script_cb;
1161	cb->set<connection, &connection::script_node_up> (this);
1162	run_script_queued (cb, _("node-up command execution failed, continuing."));
1163	}
1164
1165	break;
1166	}
1167	else
1168	slog (L_ERR, _("%s(%s): sent and received challenge do not match."),
1169	conf->nodename, (const char *)rsi);
1170	}
1171
1172	delete cctx;
1173	}	1155	}
		1156
		1157	break;
1174	}	1158	}
1175	}	1159	}
1176		1160
1177	send_reset (rsi);	1161	send_reset (rsi);
1178	break;	1162	break;
…		…
1210	// {	1194	// {
1211	slog (L_INFO, _("%s(%s): changing socket address to %s."),	1195	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1212	conf->nodename, (const char )si, (const char )rsi);	1196	conf->nodename, (const char )si, (const char )rsi);
1213		1197
1214	si = rsi;	1198	si = rsi;
		1199
		1200	if (::conf.script_node_change)
		1201	{
		1202	run_script_cb *cb = new run_script_cb;
		1203	cb->set<connection, &connection::script_node_change> (this);
		1204	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1205	}
		1206
1215	// }	1207	// }
1216	//else	1208	//else
1217	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),	1209	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
1218	// conf->nodename, (const char )si, (const char )rsi);	1210	// conf->nodename, (const char )si, (const char )rsi);
1219	}	1211	}
…		…
1240	break;	1232	break;
1241		1233
1242	case vpn_packet::PT_CONNECT_REQ:	1234	case vpn_packet::PT_CONNECT_REQ:
1243	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1235	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1244	{	1236	{
1245	connect_req_packet p = (connect_req_packet ) pkt;	1237	connect_req_packet p = (connect_req_packet )pkt;
1246		1238
1247	if (p->id > 0 && p->id <= vpn->conns.size ())	1239	if (p->id > 0 && p->id <= vpn->conns.size ())
1248	{	1240	{
1249	connection *c = vpn->conns[p->id - 1];	1241	connection *c = vpn->conns[p->id - 1];
1250	conf->protocols = p->protocols;	1242	conf->protocols = p->protocols;
1251		1243
1252	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s) [%d]",	1244	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
1253	conf->nodename, vpn->conns[p->id - 1]->conf->nodename, c->ictx && c->octx);	1245	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1246	p->protocols,
		1247	c->ictx && c->octx);
1254		1248
1255	if (c->ictx && c->octx)	1249	if (c->ictx && c->octx)
1256	{	1250	{
1257	// send connect_info packets to both sides, in case one is	1251	// send connect_info packets to both sides, in case one is
1258	// behind a nat firewall (or both ;)	1252	// behind a nat firewall (or both ;)
…		…
1281		1275
1282	c->conf->protocols = p->protocols;	1276	c->conf->protocols = p->protocols;
1283	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1277	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1284	p->si.upgrade_protocol (protocol, c->conf);	1278	p->si.upgrade_protocol (protocol, c->conf);
1285		1279
1286	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s) [%d]",	1280	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
		1281	conf->nodename,
1287	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,	1282	vpn->conns[p->id - 1]->conf->nodename,
		1283	(const char *)p->si,
		1284	p->protocols,
		1285	protocol,
		1286	p->si.supported_protocols (c->conf),
1288	(const char *)p->si, !c->ictx && !c->octx);	1287	!c->ictx && !c->octx);
1289		1288
1290	const sockinfo &dsi = forward_si (p->si);	1289	const sockinfo &dsi = forward_si (p->si);
1291		1290
1292	if (dsi.valid ())	1291	if (dsi.valid ())
1293	c->send_auth_request (dsi, true);	1292	c->send_auth_request (dsi, true);
		1293	else
		1294	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1295	vpn->conns[p->id - 1]->conf->nodename,
		1296	(const char *)p->si);
1294	}	1297	}
1295	else	1298	else
1296	slog (L_WARN,	1299	slog (L_WARN,
1297	_("received authenticated connection request from unknown node #%d, config file mismatch?"),	1300	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
1298	p->id);	1301	p->id);
…		…
1307	}	1310	}
1308		1311
1309	inline void	1312	inline void
1310	connection::keepalive_cb (ev::timer &w, int revents)	1313	connection::keepalive_cb (ev::timer &w, int revents)
1311	{	1314	{
1312	if (ev_now () >= last_activity + ::conf.keepalive + 30)	1315	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1316
		1317	if (when >= 0)
		1318	w.start (when);
		1319	else if (when < -15)
1313	{	1320	{
1314	reset_connection ();	1321	reset_connection ();
1315	establish_connection ();	1322	establish_connection ();
1316	}	1323	}
1317	else if (ev_now () < last_activity + ::conf.keepalive)
1318	w.start (last_activity + ::conf.keepalive - ev::now ());
1319	else if (conf->connectmode != conf_node::C_ONDEMAND	1324	else if (conf->connectmode != conf_node::C_ONDEMAND
1320	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1325	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1321	{	1326	{
		1327	w.start (3);
1322	send_ping (si);	1328	send_ping (si);
1323	w.start (5);
1324	}	1329	}
1325	else if (ev_now () < last_activity + ::conf.keepalive + 10)	1330	else if (when >= -10)
1326	// hold ondemand connections implicitly a few seconds longer	1331	// hold ondemand connections implicitly a few seconds longer
1327	// should delete octx, though, or something like that ;)	1332	// should delete octx, though, or something like that ;)
1328	w.start (last_activity + ::conf.keepalive + 10 - ev::now ());	1333	w.start (when + 10);
1329	else	1334	else
1330	reset_connection ();	1335	reset_connection ();
1331	}	1336	}
1332		1337
		1338	void
1333	void connection::send_connect_request (int id)	1339	connection::send_connect_request (int id)
1334	{	1340	{
1335	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1341	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1336		1342
1337	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s)",	1343	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
1338	conf->nodename, vpn->conns[id - 1]->conf->nodename);	1344	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1345	THISNODE->protocols);
1339	p->hmac_set (octx);	1346	p->hmac_set (octx);
1340	send_vpn_packet (p, si);	1347	send_vpn_packet (p, si);
1341		1348
1342	delete p;	1349	delete p;
1343	}	1350	}
1344		1351
		1352	void
1345	void connection::script_init_env (const char *ext)	1353	connection::script_init_env (const char *ext)
1346	{	1354	{
1347	char *env;	1355	char *env;
1348	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);	1356	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1349	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);	1357	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1350	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,	1358	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1351	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,	1359	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1352	conf->id & 0xff); putenv (env);	1360	conf->id & 0xff); putenv (env);
1353	}	1361	}
1354		1362
		1363	void
1355	void connection::script_init_connect_env ()	1364	connection::script_init_connect_env ()
1356	{	1365	{
1357	vpn->script_init_env ();	1366	vpn->script_init_env ();
1358		1367
1359	char *env;	1368	char *env;
1360	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1369	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1370	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1361	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1371	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1362	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1372	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1363	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1373	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1364	}	1374	}
1365		1375
1366	inline const char *	1376	inline const char *
1367	connection::script_node_up ()	1377	connection::script_node_up ()
1368	{	1378	{
…		…
1373	char *filename;	1383	char *filename;
1374	asprintf (&filename,	1384	asprintf (&filename,
1375	"%s/%s",	1385	"%s/%s",
1376	confbase,	1386	confbase,
1377	::conf.script_node_up ? ::conf.script_node_up : "node-up");	1387	::conf.script_node_up ? ::conf.script_node_up : "node-up");
		1388
		1389	return filename;
		1390	}
		1391
		1392	inline const char *
		1393	connection::script_node_change ()
		1394	{
		1395	script_init_connect_env ();
		1396
		1397	putenv ((char *)"STATE=change");
		1398
		1399	char *filename;
		1400	asprintf (&filename,
		1401	"%s/%s",
		1402	confbase,
		1403	::conf.script_node_change ? ::conf.script_node_change : "node-change");
1378		1404
1379	return filename;	1405	return filename;
1380	}	1406	}
1381		1407
1382	inline const char *	1408	inline const char *
…		…
1408	establish_connection.set<connection, &connection::establish_connection_cb> (this);	1434	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1409		1435
1410	last_establish_attempt = 0.;	1436	last_establish_attempt = 0.;
1411	octx = ictx = 0;	1437	octx = ictx = 0;
1412		1438
1413	if (!conf->protocols) // make sure some protocol is enabled
1414	conf->protocols = PROT_UDPv4;
1415
1416	connectmode = conf->connectmode;	1439	connectmode = conf->connectmode;
1417		1440
1418	// queue a dummy packet to force an initial connection attempt	1441	// queue a dummy packet to force an initial connection attempt
1419	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)	1442	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
1420	vpn_queue.put (new net_packet);	1443	vpn_queue.put (new net_packet);
…		…
1425	connection::~connection ()	1448	connection::~connection ()
1426	{	1449	{
1427	shutdown ();	1450	shutdown ();
1428	}	1451	}
1429		1452
		1453	void
1430	void connection_init ()	1454	connection_init ()
1431	{	1455	{
1432	auth_rate_limiter.clear ();	1456	auth_rate_limiter.clear ();
1433	reset_rate_limiter.clear ();	1457	reset_rate_limiter.clear ();
1434	}	1458	}
1435		1459

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Comparing gvpe/src/connection.C (file contents): Revision 1.80 by pcg, Fri Aug 15 18:11:14 2008 UTC vs. Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.80 by pcg, Fri Aug 15 18:11:14 2008 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC