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

Comparing gvpe/src/connection.C (file contents):
Revision 1.61 by pcg, Sat Nov 10 19:43:37 2007 UTC vs.
Revision 1.96 by root, Thu Mar 24 21:52:48 2011 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>	3	Copyright (C) 2003-2008,2010,2011 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	7	GVPE is free software; you can redistribute it and/or modify it
8	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
9	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
10	(at your option) any later version.	10	option) any later version.
11		11
12	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15	GNU General Public License for more details.	15	Public License for more details.
16		16
17	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
18	along with gvpe; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
19	Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
25		37
26	#include <openssl/rand.h>	38	#include <openssl/rand.h>
27	#include <openssl/evp.h>	39	#include <openssl/evp.h>
28	#include <openssl/rsa.h>	40	#include <openssl/rsa.h>
29	#include <openssl/err.h>	41	#include <openssl/err.h>
38		50
39	#if !HAVE_RAND_PSEUDO_BYTES	51	#if !HAVE_RAND_PSEUDO_BYTES
40	# define RAND_pseudo_bytes RAND_bytes	52	# define RAND_pseudo_bytes RAND_bytes
41	#endif	53	#endif
42		54
43	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	55	#define MAGIC_OLD "vped\xbd\xc6\xdb\x82" // 8 bytes of magic (still used in the protocol)
		56	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic (understood but not generated)
44		57
45	#define ULTRA_FAST 1	58	#define ULTRA_FAST 1
46	#define HLOG 15	59	#define HLOG 15
47	#include "lzf/lzf.h"	60	#include "lzf/lzf.h"
48	#include "lzf/lzf_c.c"	61	#include "lzf/lzf_c.c"
49	#include "lzf/lzf_d.c"	62	#include "lzf/lzf_d.c"
50		63
		64	//////////////////////////////////////////////////////////////////////////////
		65
		66	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		67	static ev::child rs_child_ev;
		68
		69	namespace
		70	{
		71	void // c++ requires external linkage here, apparently :(
		72	rs_child_cb (ev::child &w, int revents)
		73	{
		74	w.stop ();
		75
		76	if (rs_queue.empty ())
		77	return;
		78
		79	pid_t pid = run_script (*rs_queue.front ().first, false);
		80	if (pid)
		81	{
		82	w.set (pid);
		83	w.start ();
		84	}
		85	else
		86	slog (L_WARN, rs_queue.front ().second);
		87
		88	delete rs_queue.front ().first;
		89	rs_queue.pop ();
		90	}
		91	};
		92
		93	// despite the fancy name, this is quite a hack
		94	static void
		95	run_script_queued (run_script_cb cb, const char warnmsg)
		96	{
		97	rs_queue.push (std::make_pair (cb, warnmsg));
		98
		99	if (!rs_child_ev.is_active ())
		100	{
		101	rs_child_ev.set<rs_child_cb> ();
		102	rs_child_ev ();
		103	}
		104	}
		105
		106	//////////////////////////////////////////////////////////////////////////////
		107
51	struct crypto_ctx	108	struct crypto_ctx
52	{	109	{
53	EVP_CIPHER_CTX cctx;	110	EVP_CIPHER_CTX cctx;
54	HMAC_CTX hctx;	111	HMAC_CTX hctx;
55		112
…		…
75	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	132	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)
76	{	133	{
77	EVP_MD_CTX ctx;	134	EVP_MD_CTX ctx;
78		135
79	EVP_MD_CTX_init (&ctx);	136	EVP_MD_CTX_init (&ctx);
80	require (EVP_DigestInit (&ctx, RSA_HASH));	137	require (EVP_DigestInit (&ctx, RSA_HASH));
81	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));	138	require (EVP_DigestUpdate (&ctx, &chg, sizeof chg));
82	require (EVP_DigestUpdate(&ctx, &id, sizeof id));	139	require (EVP_DigestUpdate (&ctx, &id, sizeof id));
83	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	140	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
84	EVP_MD_CTX_cleanup (&ctx);	141	EVP_MD_CTX_cleanup (&ctx);
85	}	142	}
86		143
87	struct rsa_entry {	144	struct rsa_entry
		145	{
88	tstamp expire;	146	tstamp expire;
89	rsaid id;	147	rsaid id;
90	rsachallenge chg;	148	rsachallenge chg;
91	};	149	};
92		150
93	struct rsa_cache : list<rsa_entry>	151	struct rsa_cache : list<rsa_entry>
94	{	152	{
95	void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;	153	inline void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;
96		154
97	bool find (const rsaid &id, rsachallenge &chg)	155	bool find (const rsaid &id, rsachallenge &chg)
98	{	156	{
99	for (iterator i = begin (); i != end (); ++i)	157	for (iterator i = begin (); i != end (); ++i)
100	{	158	{
101	if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev::ev_now ())	159	if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev_now ())
102	{	160	{
103	memcpy (&chg, &i->chg, sizeof chg);	161	memcpy (&chg, &i->chg, sizeof chg);
104		162
105	erase (i);	163	erase (i);
106	return true;	164	return true;
…		…
118	rsa_entry e;	176	rsa_entry e;
119		177
120	RAND_bytes ((unsigned char *)&id, sizeof id);	178	RAND_bytes ((unsigned char *)&id, sizeof id);
121	RAND_bytes ((unsigned char *)&chg, sizeof chg);	179	RAND_bytes ((unsigned char *)&chg, sizeof chg);
122		180
123	e.expire = ev::ev_now () + RSA_TTL;	181	e.expire = ev_now () + RSA_TTL;
124	e.id = id;	182	e.id = id;
125	memcpy (&e.chg, &chg, sizeof chg);	183	memcpy (&e.chg, &chg, sizeof chg);
126		184
127	push_back (e);	185	push_back (e);
128		186
129	if (!cleaner.is_active ())	187	if (!cleaner.is_active ())
130	cleaner.again ();	188	cleaner.again ();
131	}	189	}
132		190
133	rsa_cache ()	191	rsa_cache ()
134	: cleaner (this, &rsa_cache::cleaner_cb)
135	{	192	{
		193	cleaner.set<rsa_cache, &rsa_cache::cleaner_cb> (this);
136	cleaner.set (RSA_TTL, RSA_TTL);	194	cleaner.set (RSA_TTL, RSA_TTL);
137	}	195	}
138		196
139	} rsa_cache;	197	} rsa_cache;
140		198
		199	void
141	void rsa_cache::cleaner_cb (ev::timer &w, int revents)	200	rsa_cache::cleaner_cb (ev::timer &w, int revents)
142	{	201	{
143	if (empty ())	202	if (empty ())
144	w.stop ();	203	w.stop ();
145	else	204	else
146	{	205	{
147	for (iterator i = begin (); i != end (); )	206	for (iterator i = begin (); i != end (); )
148	if (i->expire <= ev::ev_now ())	207	if (i->expire <= ev_now ())
149	i = erase (i);	208	i = erase (i);
150	else	209	else
151	++i;	210	++i;
152	}	211	}
153	}	212	}
154		213
155	//////////////////////////////////////////////////////////////////////////////	214	//////////////////////////////////////////////////////////////////////////////
156		215
157	void pkt_queue::put (net_packet *p)	216	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		217	: max_ttl (max_ttl), max_queue (max_queue)
158	{	218	{
159	if (queue[i])	219	queue = new pkt [max_queue];
160	{
161	delete queue[i];
162	j = (j + 1) % QUEUEDEPTH;
163	}
164		220
165	queue[i] = p;
166
167	i = (i + 1) % QUEUEDEPTH;
168	}
169
170	net_packet *pkt_queue::get ()
171	{
172	net_packet *p = queue[j];
173
174	if (p)
175	{
176	queue[j] = 0;
177	j = (j + 1) % QUEUEDEPTH;
178	}
179
180	return p;
181	}
182
183	pkt_queue::pkt_queue ()
184	{
185	memset (queue, 0, sizeof (queue));
186	i = 0;	221	i = 0;
187	j = 0;	222	j = 0;
		223
		224	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
188	}	225	}
189		226
190	pkt_queue::~pkt_queue ()	227	pkt_queue::~pkt_queue ()
191	{	228	{
192	for (i = QUEUEDEPTH; --i > 0; )	229	while (net_packet *p = get ())
		230	delete p;
		231
193	delete queue[i];	232	delete [] queue;
194	}	233	}
195		234
		235	void
		236	pkt_queue::expire_cb (ev::timer &w, int revents)
		237	{
		238	ev_tstamp expire = ev_now () - max_ttl;
		239
		240	for (;;)
		241	{
		242	if (empty ())
		243	break;
		244
		245	double diff = queue[j].tstamp - expire;
		246
		247	if (diff >= 0.)
		248	{
		249	w.start (diff > 0.5 ? diff : 0.5);
		250	break;
		251	}
		252
		253	delete get ();
		254	}
		255	}
		256
		257	void
		258	pkt_queue::put (net_packet *p)
		259	{
		260	ev_tstamp now = ev_now ();
		261
		262	// start expiry timer
		263	if (empty ())
		264	expire.start (max_ttl);
		265
		266	int ni = i + 1 == max_queue ? 0 : i + 1;
		267
		268	if (ni == j)
		269	delete get ();
		270
		271	queue[i].pkt = p;
		272	queue[i].tstamp = now;
		273
		274	i = ni;
		275	}
		276
		277	net_packet *
		278	pkt_queue::get ()
		279	{
		280	if (empty ())
		281	return 0;
		282
		283	net_packet *p = queue[j].pkt;
		284	queue[j].pkt = 0;
		285
		286	j = j + 1 == max_queue ? 0 : j + 1;
		287
		288	return p;
		289	}
		290
196	struct net_rateinfo {	291	struct net_rateinfo
		292	{
197	u32 host;	293	u32 host;
198	double pcnt, diff;	294	double pcnt, diff;
199	tstamp last;	295	tstamp last;
200	};	296	};
201		297
…		…
211		307
212	bool can (const sockinfo &si) { return can((u32)si.host); }	308	bool can (const sockinfo &si) { return can((u32)si.host); }
213	bool can (u32 host);	309	bool can (u32 host);
214	};	310	};
215		311
216	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	312	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
217		313
		314	bool
218	bool net_rate_limiter::can (u32 host)	315	net_rate_limiter::can (u32 host)
219	{	316	{
220	iterator i;	317	iterator i;
221		318
222	for (i = begin (); i != end (); )	319	for (i = begin (); i != end (); )
223	if (i->host == host)	320	if (i->host == host)
224	break;	321	break;
225	else if (i->last < ev::ev_now () - NRL_EXPIRE)	322	else if (i->last < ev_now () - NRL_EXPIRE)
226	i = erase (i);	323	i = erase (i);
227	else	324	else
228	i++;	325	i++;
229		326
230	if (i == end ())	327	if (i == end ())
…		…
232	net_rateinfo ri;	329	net_rateinfo ri;
233		330
234	ri.host = host;	331	ri.host = host;
235	ri.pcnt = 1.;	332	ri.pcnt = 1.;
236	ri.diff = NRL_MAXDIF;	333	ri.diff = NRL_MAXDIF;
237	ri.last = ev::ev_now ();	334	ri.last = ev_now ();
238		335
239	push_front (ri);	336	push_front (ri);
240		337
241	return true;	338	return true;
242	}	339	}
…		…
244	{	341	{
245	net_rateinfo ri (*i);	342	net_rateinfo ri (*i);
246	erase (i);	343	erase (i);
247		344
248	ri.pcnt = ri.pcnt * NRL_ALPHA;	345	ri.pcnt = ri.pcnt * NRL_ALPHA;
249	ri.diff = ri.diff * NRL_ALPHA + (ev::ev_now () - ri.last);	346	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
250		347
251	ri.last = ev::ev_now ();	348	ri.last = ev_now ();
252		349
253	double dif = ri.diff / ri.pcnt;	350	double dif = ri.diff / ri.pcnt;
254		351
255	bool send = dif > NRL_CUTOFF;	352	bool send = dif > NRL_CUTOFF;
256		353
…		…
270		367
271	/////////////////////////////////////////////////////////////////////////////	368	/////////////////////////////////////////////////////////////////////////////
272		369
273	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	370	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
274		371
		372	void
275	void hmac_packet::hmac_gen (crypto_ctx *ctx)	373	hmac_packet::hmac_gen (crypto_ctx *ctx)
276	{	374	{
277	unsigned int xlen;	375	unsigned int xlen;
278		376
279	HMAC_CTX *hctx = &ctx->hctx;	377	HMAC_CTX *hctx = &ctx->hctx;
280		378
…		…
298	hmac_gen (ctx);	396	hmac_gen (ctx);
299		397
300	return !memcmp (hmac, hmac_digest, HMACLENGTH);	398	return !memcmp (hmac, hmac_digest, HMACLENGTH);
301	}	399	}
302		400
		401	void
303	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	402	vpn_packet::set_hdr (ptype type_, unsigned int dst)
304	{	403	{
305	type = type_;	404	type = type_;
306		405
307	int src = THISNODE->id;	406	int src = THISNODE->id;
308		407
…		…
313		412
314	#define MAXVPNDATA (MAX_MTU - 6 - 6)	413	#define MAXVPNDATA (MAX_MTU - 6 - 6)
315	#define DATAHDR (sizeof (u32) + RAND_SIZE)	414	#define DATAHDR (sizeof (u32) + RAND_SIZE)
316		415
317	struct vpndata_packet : vpn_packet	416	struct vpndata_packet : vpn_packet
		417	{
		418	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		419
		420	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		421	tap_packet unpack (connection conn, u32 &seqno);
		422
		423	private:
		424	const u32 data_hdr_size () const
318	{	425	{
319	u8 data[MAXVPNDATA + DATAHDR]; // seqno
320
321	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
322	tap_packet unpack (connection conn, u32 &seqno);
323	private:
324
325	const u32 data_hdr_size () const
326	{
327	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	426	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
328	}
329	};	427	}
		428	};
330		429
331	void	430	void
332	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	431	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
333	{	432	{
334	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	433	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
336	ptype type = PT_DATA_UNCOMPRESSED;	435	ptype type = PT_DATA_UNCOMPRESSED;
337		436
338	#if ENABLE_COMPRESSION	437	#if ENABLE_COMPRESSION
339	u8 cdata[MAX_MTU];	438	u8 cdata[MAX_MTU];
340		439
341	if (conn->features & ENABLE_COMPRESSION)	440	if (conn->features & FEATURE_COMPRESSION)
342	{	441	{
343	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	442	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
344		443
345	if (cl)	444	if (cl)
346	{	445	{
…		…
473	#endif	572	#endif
474	return f;	573	return f;
475	}	574	}
476	};	575	};
477		576
		577	void
478	void config_packet::setup (ptype type, int dst)	578	config_packet::setup (ptype type, int dst)
479	{	579	{
480	prot_major = PROTOCOL_MAJOR;	580	prot_major = PROTOCOL_MAJOR;
481	prot_minor = PROTOCOL_MINOR;	581	prot_minor = PROTOCOL_MINOR;
482	randsize = RAND_SIZE;	582	randsize = RAND_SIZE;
483	hmaclen = HMACLENGTH;	583	hmaclen = HMACLENGTH;
…		…
491		591
492	len = sizeof (*this) - sizeof (net_packet);	592	len = sizeof (*this) - sizeof (net_packet);
493	set_hdr (type, dst);	593	set_hdr (type, dst);
494	}	594	}
495		595
		596	bool
496	bool config_packet::chk_config () const	597	config_packet::chk_config () const
497	{	598	{
498	if (prot_major != PROTOCOL_MAJOR)	599	if (prot_major != PROTOCOL_MAJOR)
499	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	600	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
500	else if (randsize != RAND_SIZE)	601	else if (randsize != RAND_SIZE)
501	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	602	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
…		…
525	rsaencrdata encr;	626	rsaencrdata encr;
526		627
527	auth_req_packet (int dst, bool initiate_, u8 protocols_)	628	auth_req_packet (int dst, bool initiate_, u8 protocols_)
528	{	629	{
529	config_packet::setup (PT_AUTH_REQ, dst);	630	config_packet::setup (PT_AUTH_REQ, dst);
530	strncpy (magic, MAGIC, 8);	631	strncpy (magic, MAGIC_OLD, 8);
531	initiate = !!initiate_;	632	initiate = !!initiate_;
532	protocols = protocols_;	633	protocols = protocols_;
533		634
534	len = sizeof (*this) - sizeof (net_packet);	635	len = sizeof (*this) - sizeof (net_packet);
535	}	636	}
…		…
584	/////////////////////////////////////////////////////////////////////////////	685	/////////////////////////////////////////////////////////////////////////////
585		686
586	void	687	void
587	connection::connection_established ()	688	connection::connection_established ()
588	{	689	{
589	slog (L_TRACE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);	690	slog (L_NOISE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);
590		691
591	if (ictx && octx)	692	if (ictx && octx)
592	{	693	{
593	connectmode = conf->connectmode;
594
595	// make sure rekeying timeouts are slightly asymmetric	694	// make sure rekeying timeouts are slightly asymmetric
596	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);	695	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
597	rekey.start (rekey_interval, rekey_interval);	696	rekey.start (rekey_interval, rekey_interval);
598	keepalive.start (::conf.keepalive);	697	keepalive.start (::conf.keepalive);
599		698
600	// send queued packets	699	// send queued packets
601	if (ictx && octx)	700	if (ictx && octx)
602	{	701	{
603	while (tap_packet p = (tap_packet )data_queue.get ())	702	while (tap_packet p = (tap_packet )data_queue.get ())
604	{	703	{
605	send_data_packet (p);	704	if (p->len) send_data_packet (p);
606	delete p;	705	delete p;
607	}	706	}
608		707
609	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	708	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
610	{	709	{
611	send_vpn_packet (p, si, IPTOS_RELIABILITY);	710	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
612	delete p;	711	delete p;
613	}	712	}
614	}	713	}
		714
		715	vpn->connection_established (this);
615	}	716	}
616	else	717	else
617	{	718	{
618	retry_cnt = 0;	719	retry_cnt = 0;
619	establish_connection.start (5);	720	establish_connection.start (5);
…		…
623	}	724	}
624		725
625	void	726	void
626	connection::reset_si ()	727	connection::reset_si ()
627	{	728	{
		729	if (vpn->can_direct (THISNODE, conf))
628	protocol = best_protocol (THISNODE->protocols & conf->protocols);	730	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
629		731	else
630	// mask out protocols we cannot establish
631	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
632	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
633	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
634
635	if (protocol
636	&& (!conf->can_direct (THISNODE)
637	\|\| !THISNODE->can_direct (conf)))
638	{	732	{
639	slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename);	733	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
640	protocol = 0;	734	protocol = 0;
641	}	735	}
642		736
643	si.set (conf, protocol);	737	si.set (conf, protocol);
		738
		739	is_direct = si.valid ();
644	}	740	}
645		741
646	// ensure sockinfo is valid, forward if necessary	742	// ensure sockinfo is valid, forward if necessary
647	const sockinfo &	743	const sockinfo &
648	connection::forward_si (const sockinfo &si) const	744	connection::forward_si (const sockinfo &si) const
649	{	745	{
650	if (!si.valid ())	746	if (!si.valid ())
651	{	747	{
652	connection *r = vpn->find_router ();	748	connection *r = vpn->find_router_for (this);
653		749
654	if (r)	750	if (r)
655	{	751	{
656	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	752	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
657	conf->nodename, r->conf->nodename, (const char *)r->si);	753	conf->nodename, r->conf->nodename);
658	return r->si;	754	return r->si;
659	}	755	}
660	else	756	else
661	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	757	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
662	conf->nodename);	758	conf->nodename);
663	}	759	}
664		760
665	return si;	761	return si;
666	}	762	}
…		…
676	connection::send_ping (const sockinfo &si, u8 pong)	772	connection::send_ping (const sockinfo &si, u8 pong)
677	{	773	{
678	ping_packet *pkt = new ping_packet;	774	ping_packet *pkt = new ping_packet;
679		775
680	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	776	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		777
		778	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
		779
681	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	780	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
682		781
683	delete pkt;	782	delete pkt;
684	}	783	}
685		784
…		…
704		803
705	rsachallenge chg;	804	rsachallenge chg;
706	rsa_cache.gen (pkt->id, chg);	805	rsa_cache.gen (pkt->id, chg);
707	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	806	rsa_encrypt (conf->rsa_key, chg, pkt->encr);
708		807
709	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	808	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
710		809
711	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	810	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
712		811
713	delete pkt;	812	delete pkt;
714	}	813	}
…		…
722		821
723	rsa_hash (id, chg, pkt->response);	822	rsa_hash (id, chg, pkt->response);
724		823
725	pkt->hmac_set (octx);	824	pkt->hmac_set (octx);
726		825
727	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	826	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
728		827
729	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	828	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
730		829
731	delete pkt;	830	delete pkt;
732	}	831	}
733		832
734	void	833	void
735	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	834	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
736	{	835	{
737	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)",	836	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
738	conf->id, rid, (const char *)rsi);	837	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		838	conf->protocols);
739		839
740	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	840	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
741		841
742	r->hmac_set (octx);	842	r->hmac_set (octx);
743	send_vpn_packet (r, si);	843	send_vpn_packet (r, si);
744		844
745	delete r;	845	delete r;
746	}	846	}
747		847
748	void	848	inline void
749	connection::establish_connection_cb (ev::timer &w, int revents)	849	connection::establish_connection_cb (ev::timer &w, int revents)
750	{	850	{
751	if (!ictx	851	if (!(ictx && octx)
752	&& conf != THISNODE	852	&& conf != THISNODE
753	&& connectmode != conf_node::C_NEVER	853	&& connectmode != conf_node::C_NEVER
754	&& connectmode != conf_node::C_DISABLED	854	&& connectmode != conf_node::C_DISABLED
755	&& !w.is_active ())	855	&& !w.is_active ())
756	{	856	{
		857	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		858	// and stop trying. should probably be handled by a per-connection expire handler.
		859	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		860	{
		861	reset_connection ();
		862	return;
		863	}
		864
		865	last_establish_attempt = ev_now ();
		866
757	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3	867	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
758	? (retry_cnt & 3) + 1	868	? (retry_cnt & 3) + 1
759	: 1 << (retry_cnt >> 2));	869	: 1 << (retry_cnt >> 2));
760		870
761	reset_si ();	871	reset_si ();
762		872
763	bool slow = si.prot & PROT_SLOW;	873	bool slow = si.prot & PROT_SLOW;
764		874
765	if (si.prot && !si.host)	875	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
766	{	876	{
767	slog (L_TRACE, _("%s: connection request (indirect)"), conf->nodename);
768	/TODO/ /* start the timer so we don't recurse endlessly */	877	/TODO/ /* start the timer so we don't recurse endlessly */
769	w.start (1);	878	w.start (1);
770	vpn->send_connect_request (conf->id);	879	vpn->send_connect_request (this);
771	}	880	}
772	else	881	else
773	{	882	{
774	slog (L_TRACE, _("%s: connection request (direct)"), conf->nodename, !!ictx, !!octx);	883	if (si.valid ())
		884	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		885	conf->nodename, (const char *)si);
775		886
776	const sockinfo &dsi = forward_si (si);	887	const sockinfo &dsi = forward_si (si);
777		888
778	slow = slow \|\| (dsi.prot & PROT_SLOW);	889	slow = slow \|\| (dsi.prot & PROT_SLOW);
779		890
…		…
784	else	895	else
785	send_ping (dsi, 0);	896	send_ping (dsi, 0);
786	}	897	}
787	}	898	}
788		899
789	retry_int *= slow ? 8. : 0.7;	900	retry_int *= slow ? 8. : 0.9;
790		901
791	if (retry_int < conf->max_retry)	902	if (retry_int < conf->max_retry)
792	retry_cnt++;	903	retry_cnt++;
793	else	904	else
794	retry_int = conf->max_retry;	905	retry_int = conf->max_retry;
…		…
804	{	915	{
805	slog (L_INFO, _("%s(%s): connection lost"),	916	slog (L_INFO, _("%s(%s): connection lost"),
806	conf->nodename, (const char *)si);	917	conf->nodename, (const char *)si);
807		918
808	if (::conf.script_node_down)	919	if (::conf.script_node_down)
809	if (!run_script (run_script_cb (this, &connection::script_node_down), false))	920	{
		921	run_script_cb *cb = new run_script_cb;
		922	cb->set<connection, &connection::script_node_down> (this);
810	slog (L_WARN, _("node-down command execution failed, continuing."));	923	run_script_queued (cb, _("node-down command execution failed, continuing."));
		924	}
811	}	925	}
812		926
813	delete ictx; ictx = 0;	927	delete ictx; ictx = 0;
814	delete octx; octx = 0;	928	delete octx; octx = 0;
815	#if ENABLE_DNS
816	dnsv4_reset_connection ();
817	#endif
818		929
819	si.host = 0;	930	si.host = 0;
820		931
821	last_activity = 0;	932	last_activity = 0.;
		933	//last_si_change = 0.;
822	retry_cnt = 0;	934	retry_cnt = 0;
823		935
824	rekey.stop ();	936	rekey.stop ();
825	keepalive.stop ();	937	keepalive.stop ();
826	establish_connection.stop ();	938	establish_connection.stop ();
…		…
833	send_reset (si);	945	send_reset (si);
834		946
835	reset_connection ();	947	reset_connection ();
836	}	948	}
837		949
838	void	950	// poor-man's rekeying
		951	inline void
839	connection::rekey_cb (ev::timer &w, int revents)	952	connection::rekey_cb (ev::timer &w, int revents)
840	{	953	{
841	reset_connection ();	954	reset_connection ();
842	establish_connection ();	955	establish_connection ();
843	}	956	}
…		…
860	if (oseqno > MAX_SEQNO)	973	if (oseqno > MAX_SEQNO)
861	rekey ();	974	rekey ();
862	}	975	}
863		976
864	void	977	void
		978	connection::post_inject_queue ()
		979	{
		980	// force a connection every now and when when packets are sent (max 1/s)
		981	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		982	establish_connection.stop ();
		983
		984	establish_connection ();
		985	}
		986
		987	void
865	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	988	connection::inject_data_packet (tap_packet *pkt)
866	{	989	{
867	if (ictx && octx)	990	if (ictx && octx)
868	send_data_packet (pkt);	991	send_data_packet (pkt);
869	else	992	else
870	{	993	{
871	if (!broadcast)
872	data_queue.put (new tap_packet (*pkt));	994	data_queue.put (new tap_packet (*pkt));
873		995	post_inject_queue ();
874	establish_connection ();
875	}	996	}
876	}	997	}
877		998
		999	void
878	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1000	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
879	{	1001	{
880	if (ictx && octx)	1002	if (ictx && octx)
881	send_vpn_packet (pkt, si, tos);	1003	send_vpn_packet (pkt, si, tos);
882	else	1004	else
883	{	1005	{
884	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1006	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
885		1007	post_inject_queue ();
886	establish_connection ();
887	}	1008	}
888	}	1009	}
889		1010
890	void	1011	void
891	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1012	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
892	{	1013	{
893	last_activity = ev::ev_now ();	1014	last_activity = ev_now ();
894		1015
895	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1016	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
896	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1017	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
897		1018
898	if (connectmode == conf_node::C_DISABLED)	1019	if (connectmode == conf_node::C_DISABLED)
899	return;	1020	return;
900		1021
901	switch (pkt->typ ())	1022	switch (pkt->typ ())
902	{	1023	{
903	case vpn_packet::PT_PING:	1024	case vpn_packet::PT_PING:
		1025	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1026
904	// we send pings instead of auth packets after some retries,	1027	// we send pings instead of auth packets after some retries,
905	// so reset the retry counter and establish a connection	1028	// so reset the retry counter and establish a connection
906	// when we receive a ping.	1029	// when we receive a ping.
907	if (!ictx)	1030	if (!ictx)
908	{	1031	{
909	if (auth_rate_limiter.can (rsi))	1032	if (auth_rate_limiter.can (rsi))
910	send_auth_request (rsi, true);	1033	send_auth_request (rsi, true);
911	}	1034	}
912	else	1035	else
		1036	// we would love to change the socket address here, but ping's aren't
		1037	// authenticated, so we best ignore it.
913	send_ping (rsi, 1); // pong	1038	send_ping (rsi, 1); // pong
914		1039
915	break;	1040	break;
916		1041
917	case vpn_packet::PT_PONG:	1042	case vpn_packet::PT_PONG:
		1043	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1044
		1045	// a PONG might mean that the other side doesn't really know
		1046	// about our desire for communication.
		1047	establish_connection ();
918	break;	1048	break;
919		1049
920	case vpn_packet::PT_RESET:	1050	case vpn_packet::PT_RESET:
921	{	1051	{
922	reset_connection ();	1052	reset_connection ();
923		1053
924	config_packet p = (config_packet ) pkt;	1054	config_packet p = (config_packet ) pkt;
925		1055
926	if (!p->chk_config ())	1056	if (!p->chk_config ())
927	{	1057	{
928	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1058	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
929	conf->nodename, (const char *)rsi);	1059	conf->nodename, (const char *)rsi);
930	connectmode = conf_node::C_DISABLED;	1060	connectmode = conf_node::C_DISABLED;
931	}	1061	}
932	else if (connectmode == conf_node::C_ALWAYS)	1062	else if (connectmode == conf_node::C_ALWAYS)
933	establish_connection ();	1063	establish_connection ();
…		…
935	break;	1065	break;
936		1066
937	case vpn_packet::PT_AUTH_REQ:	1067	case vpn_packet::PT_AUTH_REQ:
938	if (auth_rate_limiter.can (rsi))	1068	if (auth_rate_limiter.can (rsi))
939	{	1069	{
940	auth_req_packet p = (auth_req_packet ) pkt;	1070	auth_req_packet p = (auth_req_packet )pkt;
941		1071
942	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1072	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1073	conf->nodename, p->initiate ? "initiate" : "reply",
		1074	p->protocols, p->features);
943		1075
944	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1076	if (p->chk_config ()
		1077	&& (!memcmp (p->magic, MAGIC_OLD, 8) \|\| !memcmp (p->magic, MAGIC, 8)))
945	{	1078	{
946	if (p->prot_minor != PROTOCOL_MINOR)	1079	if (p->prot_minor != PROTOCOL_MINOR)
947	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1080	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
948	conf->nodename, (const char *)rsi,	1081	conf->nodename, (const char *)rsi,
949	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1082	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
…		…
975		1108
976	break;	1109	break;
977	}	1110	}
978	}	1111	}
979	else	1112	else
980	slog (L_WARN, _("%s(%s): protocol mismatch"),	1113	slog (L_WARN, _("%s(%s): protocol mismatch."),
981	conf->nodename, (const char *)rsi);	1114	conf->nodename, (const char *)rsi);
982		1115
983	send_reset (rsi);	1116	send_reset (rsi);
984	}	1117	}
985		1118
986	break;	1119	break;
987		1120
988	case vpn_packet::PT_AUTH_RES:	1121	case vpn_packet::PT_AUTH_RES:
989	{	1122	{
990	auth_res_packet p = (auth_res_packet ) pkt;	1123	auth_res_packet p = (auth_res_packet )pkt;
991		1124
992	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1125	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
993		1126
994	if (p->chk_config ())	1127	if (p->chk_config ())
995	{	1128	{
996	if (p->prot_minor != PROTOCOL_MINOR)	1129	if (p->prot_minor != PROTOCOL_MINOR)
997	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1130	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
…		…
1000		1133
1001	rsachallenge chg;	1134	rsachallenge chg;
1002		1135
1003	if (!rsa_cache.find (p->id, chg))	1136	if (!rsa_cache.find (p->id, chg))
1004	{	1137	{
1005	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1138	slog (L_ERR, _("%s(%s): unrequested auth response, ignoring."),
1006	conf->nodename, (const char *)rsi);	1139	conf->nodename, (const char *)rsi);
1007	break;	1140	break;
1008	}	1141	}
1009	else	1142	else
1010	{	1143	{
1011	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1144	crypto_ctx *cctx = new crypto_ctx (chg, 0);
1012		1145
1013	if (!p->hmac_chk (cctx))	1146	if (!p->hmac_chk (cctx))
1014	{	1147	{
1015	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"	1148	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1016	"could be an attack, or just corruption or a synchronization error"),	1149	"could be an attack, or just corruption or a synchronization error."),
1017	conf->nodename, (const char *)rsi);	1150	conf->nodename, (const char *)rsi);
1018	break;	1151	break;
1019	}	1152	}
1020	else	1153	else
1021	{	1154	{
…		…
1032	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid	1165	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1033		1166
1034	si = rsi;	1167	si = rsi;
1035	protocol = rsi.prot;	1168	protocol = rsi.prot;
1036		1169
		1170	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		1171	conf->nodename, (const char *)rsi,
		1172	is_direct ? "direct" : "forwarded",
		1173	p->prot_major, p->prot_minor);
		1174
1037	connection_established ();	1175	connection_established ();
1038		1176
1039	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1040	conf->nodename, (const char *)rsi,
1041	p->prot_major, p->prot_minor);
1042
1043	if (::conf.script_node_up)	1177	if (::conf.script_node_up)
1044	if (!run_script (run_script_cb (this, &connection::script_node_up), false))	1178	{
		1179	run_script_cb *cb = new run_script_cb;
		1180	cb->set<connection, &connection::script_node_up> (this);
1045	slog (L_WARN, _("node-up command execution failed, continuing."));	1181	run_script_queued (cb, _("node-up command execution failed, continuing."));
		1182	}
1046		1183
1047	break;	1184	break;
1048	}	1185	}
1049	else	1186	else
1050	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),	1187	slog (L_ERR, _("%s(%s): sent and received challenge do not match."),
1051	conf->nodename, (const char *)rsi);	1188	conf->nodename, (const char *)rsi);
1052	}	1189	}
1053		1190
1054	delete cctx;	1191	delete cctx;
1055	}	1192	}
…		…
1071	{	1208	{
1072	vpndata_packet p = (vpndata_packet )pkt;	1209	vpndata_packet p = (vpndata_packet )pkt;
1073		1210
1074	if (!p->hmac_chk (ictx))	1211	if (!p->hmac_chk (ictx))
1075	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1212	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1076	"could be an attack, or just corruption or a synchronization error"),	1213	"could be an attack, or just corruption or a synchronization error."),
1077	conf->nodename, (const char *)rsi);	1214	conf->nodename, (const char *)rsi);
1078	else	1215	else
1079	{	1216	{
1080	u32 seqno;	1217	u32 seqno;
1081	tap_packet *d = p->unpack (this, seqno);	1218	tap_packet *d = p->unpack (this, seqno);
		1219	int seqclass = iseqno.seqno_classify (seqno);
1082		1220
1083	if (iseqno.recv_ok (seqno))	1221	if (seqclass == 0) // ok
1084	{	1222	{
1085	vpn->tap->send (d);	1223	vpn->tap->send (d);
1086		1224
1087	if (si != rsi)	1225	if (si != rsi)
1088	{	1226	{
1089	// fast re-sync on source address changes, useful especially for tcp/ip	1227	// fast re-sync on source address changes, useful especially for tcp/ip
		1228	//if (last_si_change < ev_now () + 5.)
1090	si = rsi;	1229	// {
1091
1092	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1230	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1093	conf->nodename, (const char )si, (const char )rsi);	1231	conf->nodename, (const char )si, (const char )rsi);
		1232
		1233	si = rsi;
		1234
		1235	if (::conf.script_node_change)
		1236	{
		1237	run_script_cb *cb = new run_script_cb;
		1238	cb->set<connection, &connection::script_node_change> (this);
		1239	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1240	}
		1241
		1242	// }
		1243	//else
		1244	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1245	// conf->nodename, (const char )si, (const char )rsi);
1094	}	1246	}
		1247	}
		1248	else if (seqclass == 1) // far history
		1249	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1250	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1251	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1252	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1253	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1254	else if (seqclass == 3) // reset
		1255	{
		1256	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1257	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1258	send_reset (rsi);
1095	}	1259	}
1096		1260
1097	delete d;	1261	delete d;
1098	break;	1262	break;
1099	}	1263	}
…		…
1103	break;	1267	break;
1104		1268
1105	case vpn_packet::PT_CONNECT_REQ:	1269	case vpn_packet::PT_CONNECT_REQ:
1106	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1270	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1107	{	1271	{
1108	connect_req_packet p = (connect_req_packet ) pkt;	1272	connect_req_packet p = (connect_req_packet )pkt;
1109		1273
1110	if (p->id > 0 && p->id <= vpn->conns.size ())	1274	if (p->id > 0 && p->id <= vpn->conns.size ())
1111	{	1275	{
1112	connection *c = vpn->conns[p->id - 1];	1276	connection *c = vpn->conns[p->id - 1];
1113	conf->protocols = p->protocols;	1277	conf->protocols = p->protocols;
1114		1278
1115	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]",	1279	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1280	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1281	p->protocols,
1116	conf->id, p->id, c->ictx && c->octx);	1282	c->ictx && c->octx);
1117		1283
1118	if (c->ictx && c->octx)	1284	if (c->ictx && c->octx)
1119	{	1285	{
1120	// send connect_info packets to both sides, in case one is	1286	// send connect_info packets to both sides, in case one is
1121	// behind a nat firewall (or both ;)	1287	// behind a nat firewall (or both ;)
…		…
1144		1310
1145	c->conf->protocols = p->protocols;	1311	c->conf->protocols = p->protocols;
1146	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1312	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1147	p->si.upgrade_protocol (protocol, c->conf);	1313	p->si.upgrade_protocol (protocol, c->conf);
1148		1314
1149	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1315	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1150	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1316	conf->nodename,
		1317	vpn->conns[p->id - 1]->conf->nodename,
		1318	(const char *)p->si,
		1319	p->protocols,
		1320	protocol,
		1321	p->si.supported_protocols (c->conf),
		1322	!c->ictx && !c->octx);
1151		1323
1152	const sockinfo &dsi = forward_si (p->si);	1324	const sockinfo &dsi = forward_si (p->si);
1153		1325
1154	if (dsi.valid ())	1326	if (dsi.valid ())
1155	c->send_auth_request (dsi, true);	1327	c->send_auth_request (dsi, true);
		1328	else
		1329	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1330	vpn->conns[p->id - 1]->conf->nodename,
		1331	(const char *)p->si);
1156	}	1332	}
1157	else	1333	else
1158	slog (L_WARN,	1334	slog (L_WARN,
1159	_("received authenticated connection request from unknown node #%d, config file mismatch?"),	1335	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
1160	p->id);	1336	p->id);
…		…
1166	send_reset (rsi);	1342	send_reset (rsi);
1167	break;	1343	break;
1168	}	1344	}
1169	}	1345	}
1170		1346
		1347	inline void
1171	void connection::keepalive_cb (ev::timer &w, int revents)	1348	connection::keepalive_cb (ev::timer &w, int revents)
1172	{	1349	{
1173	if (ev::ev_now () >= last_activity + ::conf.keepalive + 30)	1350	if (ev_now () >= last_activity + ::conf.keepalive + 15)
1174	{	1351	{
1175	reset_connection ();	1352	reset_connection ();
1176	establish_connection ();	1353	establish_connection ();
1177	}	1354	}
1178	else if (ev::ev_now () < last_activity + ::conf.keepalive)	1355	else if (ev_now () < last_activity + ::conf.keepalive)
1179	w.start (last_activity + ::conf.keepalive - ev::now ());	1356	w.start (last_activity + ::conf.keepalive - ev::now ());
1180	else if (conf->connectmode != conf_node::C_ONDEMAND	1357	else if (conf->connectmode != conf_node::C_ONDEMAND
1181	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1358	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1182	{	1359	{
1183	send_ping (si);	1360	send_ping (si);
1184	w.start (5);	1361	w.start (3);
1185	}	1362	}
1186	else if (ev::ev_now () < last_activity + ::conf.keepalive + 10)	1363	else if (ev_now () < last_activity + ::conf.keepalive + 10)
1187	// hold ondemand connections implicitly a few seconds longer	1364	// hold ondemand connections implicitly a few seconds longer
1188	// should delete octx, though, or something like that ;)	1365	// should delete octx, though, or something like that ;)
1189	w.start (last_activity + ::conf.keepalive + 10 - ev::now ());	1366	w.start (last_activity + ::conf.keepalive + 10 - ev::now ());
1190	else	1367	else
1191	reset_connection ();	1368	reset_connection ();
1192	}	1369	}
1193		1370
		1371	void
1194	void connection::send_connect_request (int id)	1372	connection::send_connect_request (int id)
1195	{	1373	{
1196	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1374	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1197		1375
1198	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1376	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1377	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1378	THISNODE->protocols);
1199	p->hmac_set (octx);	1379	p->hmac_set (octx);
1200	send_vpn_packet (p, si);	1380	send_vpn_packet (p, si);
1201		1381
1202	delete p;	1382	delete p;
1203	}	1383	}
1204		1384
		1385	void
1205	void connection::script_init_env (const char *ext)	1386	connection::script_init_env (const char *ext)
1206	{	1387	{
1207	char *env;	1388	char *env;
1208	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);	1389	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1209	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);	1390	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1210	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,	1391	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1211	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,	1392	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1212	conf->id & 0xff); putenv (env);	1393	conf->id & 0xff); putenv (env);
1213	}	1394	}
1214		1395
		1396	void
1215	void connection::script_init_connect_env ()	1397	connection::script_init_connect_env ()
1216	{	1398	{
1217	vpn->script_init_env ();	1399	vpn->script_init_env ();
1218		1400
1219	char *env;	1401	char *env;
1220	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1402	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1403	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1221	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1404	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1222	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1405	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1223	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1406	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1224	}	1407	}
1225		1408
		1409	inline const char *
1226	const char *connection::script_node_up ()	1410	connection::script_node_up ()
1227	{	1411	{
1228	script_init_connect_env ();	1412	script_init_connect_env ();
1229		1413
1230	putenv ((char *)"STATE=up");	1414	putenv ((char *)"STATE=up");
1231		1415
…		…
1236	::conf.script_node_up ? ::conf.script_node_up : "node-up");	1420	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1237		1421
1238	return filename;	1422	return filename;
1239	}	1423	}
1240		1424
		1425	inline const char *
		1426	connection::script_node_change ()
		1427	{
		1428	script_init_connect_env ();
		1429
		1430	putenv ((char *)"STATE=change");
		1431
		1432	char *filename;
		1433	asprintf (&filename,
		1434	"%s/%s",
		1435	confbase,
		1436	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1437
		1438	return filename;
		1439	}
		1440
		1441	inline const char *
1241	const char *connection::script_node_down ()	1442	connection::script_node_down ()
1242	{	1443	{
1243	script_init_connect_env ();	1444	script_init_connect_env ();
1244		1445
1245	putenv ((char *)"STATE=down");	1446	putenv ((char *)"STATE=down");
1246		1447
…		…
1252		1453
1253	return filename;	1454	return filename;
1254	}	1455	}
1255		1456
1256	connection::connection (struct vpn vpn, conf_node conf)	1457	connection::connection (struct vpn vpn, conf_node conf)
1257	: vpn(vpn), conf(conf)	1458	: vpn(vpn), conf(conf),
1258	, rekey (this, &connection::rekey_cb)
1259	, keepalive (this, &connection::keepalive_cb)
1260	, establish_connection (this, &connection::establish_connection_cb)
1261	#if ENABLE_DNS	1459	#if ENABLE_DNS
1262	, dns (0)	1460	dns (0),
1263	#endif	1461	#endif
		1462	data_queue(conf->max_ttl, conf->max_queue + 1),
		1463	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1264	{	1464	{
		1465	rekey .set<connection, &connection::rekey_cb > (this);
		1466	keepalive .set<connection, &connection::keepalive_cb > (this);
		1467	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1468
		1469	last_establish_attempt = 0.;
1265	octx = ictx = 0;	1470	octx = ictx = 0;
1266	retry_cnt = 0;
1267		1471
1268	if (!conf->protocols) // make sure some protocol is enabled	1472	connectmode = conf->connectmode;
1269	conf->protocols = PROT_UDPv4;
1270		1473
1271	connectmode = conf_node::C_ALWAYS; // initial setting	1474	// queue a dummy packet to force an initial connection attempt
		1475	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1476	vpn_queue.put (new net_packet);
		1477
1272	reset_connection ();	1478	reset_connection ();
1273	}	1479	}
1274		1480
1275	connection::~connection ()	1481	connection::~connection ()
1276	{	1482	{
1277	shutdown ();	1483	shutdown ();
1278	}	1484	}
1279		1485
		1486	void
1280	void connection_init ()	1487	connection_init ()
1281	{	1488	{
1282	auth_rate_limiter.clear ();	1489	auth_rate_limiter.clear ();
1283	reset_rate_limiter.clear ();	1490	reset_rate_limiter.clear ();
1284	}	1491	}
1285		1492

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Comparing gvpe/src/connection.C (file contents): Revision 1.61 by pcg, Sat Nov 10 19:43:37 2007 UTC vs. Revision 1.96 by root, Thu Mar 24 21:52:48 2011 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.61 by pcg, Sat Nov 10 19:43:37 2007 UTC vs.
Revision 1.96 by root, Thu Mar 24 21:52:48 2011 UTC