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

Comparing gvpe/src/connection.C (file contents):
Revision 1.59 by pcg, Mon Dec 5 12:58:09 2005 UTC vs.
Revision 1.97 by root, Tue Dec 4 13:23:17 2012 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 (time_watcher &w); time_watcher 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 > 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;
107	}	165	}
108	}	166	}
109		167
110	if (cleaner.at < NOW)	168	if (!cleaner.is_active ())
111	cleaner.start (NOW + RSA_TTL);	169	cleaner.again ();
112		170
113	return false;	171	return false;
114	}	172	}
115		173
116	void gen (rsaid &id, rsachallenge &chg)	174	void gen (rsaid &id, rsachallenge &chg)
…		…
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 = 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.at < NOW)	187	if (!cleaner.is_active ())
130	cleaner.start (NOW + RSA_TTL);	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);
		194	cleaner.set (RSA_TTL, RSA_TTL);
		195	}
136		196
137	} rsa_cache;	197	} rsa_cache;
138		198
139	void rsa_cache::cleaner_cb (time_watcher &w)	199	void
		200	rsa_cache::cleaner_cb (ev::timer &w, int revents)
140	{	201	{
141	if (!empty ())	202	if (empty ())
		203	w.stop ();
		204	else
142	{	205	{
143	w.start (NOW + RSA_TTL);
144
145	for (iterator i = begin (); i != end (); )	206	for (iterator i = begin (); i != end (); )
146	if (i->expire <= NOW)	207	if (i->expire <= ev_now ())
147	i = erase (i);	208	i = erase (i);
148	else	209	else
149	++i;	210	++i;
150	}	211	}
151	}	212	}
152		213
153	//////////////////////////////////////////////////////////////////////////////	214	//////////////////////////////////////////////////////////////////////////////
154		215
155	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)
156	{	218	{
157	if (queue[i])	219	queue = new pkt [max_queue];
158	{
159	delete queue[i];
160	j = (j + 1) % QUEUEDEPTH;
161	}
162		220
163	queue[i] = p;
164
165	i = (i + 1) % QUEUEDEPTH;
166	}
167
168	net_packet *pkt_queue::get ()
169	{
170	net_packet *p = queue[j];
171
172	if (p)
173	{
174	queue[j] = 0;
175	j = (j + 1) % QUEUEDEPTH;
176	}
177
178	return p;
179	}
180
181	pkt_queue::pkt_queue ()
182	{
183	memset (queue, 0, sizeof (queue));
184	i = 0;	221	i = 0;
185	j = 0;	222	j = 0;
		223
		224	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
186	}	225	}
187		226
188	pkt_queue::~pkt_queue ()	227	pkt_queue::~pkt_queue ()
189	{	228	{
190	for (i = QUEUEDEPTH; --i > 0; )	229	while (net_packet *p = get ())
		230	delete p;
		231
191	delete queue[i];	232	delete [] queue;
192	}	233	}
193		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
194	struct net_rateinfo {	291	struct net_rateinfo
		292	{
195	u32 host;	293	u32 host;
196	double pcnt, diff;	294	double pcnt, diff;
197	tstamp last;	295	tstamp last;
198	};	296	};
199		297
…		…
209		307
210	bool can (const sockinfo &si) { return can((u32)si.host); }	308	bool can (const sockinfo &si) { return can((u32)si.host); }
211	bool can (u32 host);	309	bool can (u32 host);
212	};	310	};
213		311
214	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	312	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
215		313
		314	bool
216	bool net_rate_limiter::can (u32 host)	315	net_rate_limiter::can (u32 host)
217	{	316	{
218	iterator i;	317	iterator i;
219		318
220	for (i = begin (); i != end (); )	319	for (i = begin (); i != end (); )
221	if (i->host == host)	320	if (i->host == host)
222	break;	321	break;
223	else if (i->last < NOW - NRL_EXPIRE)	322	else if (i->last < ev_now () - NRL_EXPIRE)
224	i = erase (i);	323	i = erase (i);
225	else	324	else
226	i++;	325	i++;
227		326
228	if (i == end ())	327	if (i == end ())
…		…
230	net_rateinfo ri;	329	net_rateinfo ri;
231		330
232	ri.host = host;	331	ri.host = host;
233	ri.pcnt = 1.;	332	ri.pcnt = 1.;
234	ri.diff = NRL_MAXDIF;	333	ri.diff = NRL_MAXDIF;
235	ri.last = NOW;	334	ri.last = ev_now ();
236		335
237	push_front (ri);	336	push_front (ri);
238		337
239	return true;	338	return true;
240	}	339	}
…		…
242	{	341	{
243	net_rateinfo ri (*i);	342	net_rateinfo ri (*i);
244	erase (i);	343	erase (i);
245		344
246	ri.pcnt = ri.pcnt * NRL_ALPHA;	345	ri.pcnt = ri.pcnt * NRL_ALPHA;
247	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	346	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
248		347
249	ri.last = NOW;	348	ri.last = ev_now ();
250		349
251	double dif = ri.diff / ri.pcnt;	350	double dif = ri.diff / ri.pcnt;
252		351
253	bool send = dif > NRL_CUTOFF;	352	bool send = dif > NRL_CUTOFF;
254		353
…		…
268		367
269	/////////////////////////////////////////////////////////////////////////////	368	/////////////////////////////////////////////////////////////////////////////
270		369
271	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	370	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
272		371
		372	void
273	void hmac_packet::hmac_gen (crypto_ctx *ctx)	373	hmac_packet::hmac_gen (crypto_ctx *ctx)
274	{	374	{
275	unsigned int xlen;	375	unsigned int xlen;
276		376
277	HMAC_CTX *hctx = &ctx->hctx;	377	HMAC_CTX *hctx = &ctx->hctx;
278		378
…		…
296	hmac_gen (ctx);	396	hmac_gen (ctx);
297		397
298	return !memcmp (hmac, hmac_digest, HMACLENGTH);	398	return !memcmp (hmac, hmac_digest, HMACLENGTH);
299	}	399	}
300		400
		401	void
301	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	402	vpn_packet::set_hdr (ptype type_, unsigned int dst)
302	{	403	{
303	type = type_;	404	type = type_;
304		405
305	int src = THISNODE->id;	406	int src = THISNODE->id;
306		407
…		…
311		412
312	#define MAXVPNDATA (MAX_MTU - 6 - 6)	413	#define MAXVPNDATA (MAX_MTU - 6 - 6)
313	#define DATAHDR (sizeof (u32) + RAND_SIZE)	414	#define DATAHDR (sizeof (u32) + RAND_SIZE)
314		415
315	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
316	{	425	{
317	u8 data[MAXVPNDATA + DATAHDR]; // seqno
318
319	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
320	tap_packet unpack (connection conn, u32 &seqno);
321	private:
322
323	const u32 data_hdr_size () const
324	{
325	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	426	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
326	}
327	};	427	}
		428	};
328		429
329	void	430	void
330	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)
331	{	432	{
332	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	433	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
334	ptype type = PT_DATA_UNCOMPRESSED;	435	ptype type = PT_DATA_UNCOMPRESSED;
335		436
336	#if ENABLE_COMPRESSION	437	#if ENABLE_COMPRESSION
337	u8 cdata[MAX_MTU];	438	u8 cdata[MAX_MTU];
338		439
339	if (conn->features & ENABLE_COMPRESSION)	440	if (conn->features & FEATURE_COMPRESSION)
340	{	441	{
341	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	442	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
342		443
343	if (cl)	444	if (cl)
344	{	445	{
…		…
471	#endif	572	#endif
472	return f;	573	return f;
473	}	574	}
474	};	575	};
475		576
		577	void
476	void config_packet::setup (ptype type, int dst)	578	config_packet::setup (ptype type, int dst)
477	{	579	{
478	prot_major = PROTOCOL_MAJOR;	580	prot_major = PROTOCOL_MAJOR;
479	prot_minor = PROTOCOL_MINOR;	581	prot_minor = PROTOCOL_MINOR;
480	randsize = RAND_SIZE;	582	randsize = RAND_SIZE;
481	hmaclen = HMACLENGTH;	583	hmaclen = HMACLENGTH;
…		…
489		591
490	len = sizeof (*this) - sizeof (net_packet);	592	len = sizeof (*this) - sizeof (net_packet);
491	set_hdr (type, dst);	593	set_hdr (type, dst);
492	}	594	}
493		595
		596	bool
494	bool config_packet::chk_config () const	597	config_packet::chk_config () const
495	{	598	{
496	if (prot_major != PROTOCOL_MAJOR)	599	if (prot_major != PROTOCOL_MAJOR)
497	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);
498	else if (randsize != RAND_SIZE)	601	else if (randsize != RAND_SIZE)
499	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);
…		…
523	rsaencrdata encr;	626	rsaencrdata encr;
524		627
525	auth_req_packet (int dst, bool initiate_, u8 protocols_)	628	auth_req_packet (int dst, bool initiate_, u8 protocols_)
526	{	629	{
527	config_packet::setup (PT_AUTH_REQ, dst);	630	config_packet::setup (PT_AUTH_REQ, dst);
528	strncpy (magic, MAGIC, 8);	631	strncpy (magic, MAGIC_OLD, 8);
529	initiate = !!initiate_;	632	initiate = !!initiate_;
530	protocols = protocols_;	633	protocols = protocols_;
531		634
532	len = sizeof (*this) - sizeof (net_packet);	635	len = sizeof (*this) - sizeof (net_packet);
533	}	636	}
…		…
582	/////////////////////////////////////////////////////////////////////////////	685	/////////////////////////////////////////////////////////////////////////////
583		686
584	void	687	void
585	connection::connection_established ()	688	connection::connection_established ()
586	{	689	{
		690	slog (L_NOISE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);
		691
587	if (ictx && octx)	692	if (ictx && octx)
588	{	693	{
589	connectmode = conf->connectmode;
590
591	// make sure rekeying timeouts are slightly asymmetric	694	// make sure rekeying timeouts are slightly asymmetric
592	rekey.start (NOW + ::conf.rekey	695	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
593	+ (conf->id > THISNODE->id ? 10 : 0));	696	rekey.start (rekey_interval, rekey_interval);
		697
594	keepalive.start (NOW + ::conf.keepalive);	698	keepalive.start (::conf.keepalive);
595		699
596	// send queued packets	700	// send queued packets
597	if (ictx && octx)	701	if (ictx && octx)
598	{	702	{
599	while (tap_packet p = (tap_packet )data_queue.get ())	703	while (tap_packet p = (tap_packet )data_queue.get ())
600	{	704	{
601	send_data_packet (p);	705	if (p->len) send_data_packet (p);
602	delete p;	706	delete p;
603	}	707	}
604		708
605	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	709	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
606	{	710	{
607	send_vpn_packet (p, si, IPTOS_RELIABILITY);	711	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
608	delete p;	712	delete p;
609	}	713	}
610	}	714	}
		715
		716	vpn->connection_established (this);
611	}	717	}
612	else	718	else
613	{	719	{
614	retry_cnt = 0;	720	retry_cnt = 0;
615	establish_connection.start (NOW + 5);	721	establish_connection.start (5);
616	keepalive.stop ();	722	keepalive.stop ();
617	rekey.stop ();	723	rekey.stop ();
618	}	724	}
619	}	725	}
620		726
621	void	727	void
622	connection::reset_si ()	728	connection::reset_si ()
623	{	729	{
		730	if (vpn->can_direct (THISNODE, conf))
624	protocol = best_protocol (THISNODE->protocols & conf->protocols);	731	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
625		732	else
626	// mask out protocols we cannot establish
627	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
628	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
629	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
630
631	if (protocol
632	&& (!conf->can_direct (THISNODE)
633	\|\| !THISNODE->can_direct (conf)))
634	{	733	{
635	slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename);	734	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
636	protocol = 0;	735	protocol = 0;
637	}	736	}
638		737
639	si.set (conf, protocol);	738	si.set (conf, protocol);
		739
		740	is_direct = si.valid ();
640	}	741	}
641		742
642	// ensure sockinfo is valid, forward if necessary	743	// ensure sockinfo is valid, forward if necessary
643	const sockinfo &	744	const sockinfo &
644	connection::forward_si (const sockinfo &si) const	745	connection::forward_si (const sockinfo &si) const
645	{	746	{
646	if (!si.valid ())	747	if (!si.valid ())
647	{	748	{
648	connection *r = vpn->find_router ();	749	connection *r = vpn->find_router_for (this);
649		750
650	if (r)	751	if (r)
651	{	752	{
652	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	753	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
653	conf->nodename, r->conf->nodename, (const char *)r->si);	754	conf->nodename, r->conf->nodename);
654	return r->si;	755	return r->si;
655	}	756	}
656	else	757	else
657	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	758	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
658	conf->nodename);	759	conf->nodename);
659	}	760	}
660		761
661	return si;	762	return si;
662	}	763	}
…		…
672	connection::send_ping (const sockinfo &si, u8 pong)	773	connection::send_ping (const sockinfo &si, u8 pong)
673	{	774	{
674	ping_packet *pkt = new ping_packet;	775	ping_packet *pkt = new ping_packet;
675		776
676	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	777	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		778
		779	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
		780
677	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	781	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
678		782
679	delete pkt;	783	delete pkt;
680	}	784	}
681		785
…		…
700		804
701	rsachallenge chg;	805	rsachallenge chg;
702	rsa_cache.gen (pkt->id, chg);	806	rsa_cache.gen (pkt->id, chg);
703	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	807	rsa_encrypt (conf->rsa_key, chg, pkt->encr);
704		808
705	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	809	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
706		810
707	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	811	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
708		812
709	delete pkt;	813	delete pkt;
710	}	814	}
…		…
718		822
719	rsa_hash (id, chg, pkt->response);	823	rsa_hash (id, chg, pkt->response);
720		824
721	pkt->hmac_set (octx);	825	pkt->hmac_set (octx);
722		826
723	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	827	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
724		828
725	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	829	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
726		830
727	delete pkt;	831	delete pkt;
728	}	832	}
729		833
730	void	834	void
731	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	835	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
732	{	836	{
733	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)",	837	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
734	conf->id, rid, (const char *)rsi);	838	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		839	conf->protocols);
735		840
736	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	841	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
737		842
738	r->hmac_set (octx);	843	r->hmac_set (octx);
739	send_vpn_packet (r, si);	844	send_vpn_packet (r, si);
740		845
741	delete r;	846	delete r;
742	}	847	}
743		848
744	void	849	inline void
745	connection::establish_connection_cb (time_watcher &w)	850	connection::establish_connection_cb (ev::timer &w, int revents)
746	{	851	{
747	if (!ictx	852	if (!(ictx && octx)
748	&& conf != THISNODE	853	&& conf != THISNODE
749	&& connectmode != conf_node::C_NEVER	854	&& connectmode != conf_node::C_NEVER
750	&& connectmode != conf_node::C_DISABLED	855	&& connectmode != conf_node::C_DISABLED
751	&& NOW > w.at)	856	&& !w.is_active ())
752	{	857	{
753	w.at = TSTAMP_MAX; // first disable this watcher in case of recursion	858	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		859	// and stop trying. should probably be handled by a per-connection expire handler.
		860	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		861	{
		862	reset_connection ();
		863	return;
		864	}
754		865
755	double retry_int = double (retry_cnt & 3	866	last_establish_attempt = ev_now ();
		867
		868	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
756	? (retry_cnt & 3) + 1	869	? (retry_cnt & 3) + 1
757	: 1 << (retry_cnt >> 2));	870	: 1 << (retry_cnt >> 2));
758		871
759	reset_si ();	872	reset_si ();
760		873
761	bool slow = si.prot & PROT_SLOW;	874	bool slow = si.prot & PROT_SLOW;
762		875
763	if (si.prot && !si.host)	876	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		877	{
		878	/TODO/ /* start the timer so we don't recurse endlessly */
		879	w.start (1);
764	vpn->send_connect_request (conf->id);	880	vpn->send_connect_request (this);
		881	}
765	else	882	else
766	{	883	{
		884	if (si.valid ())
		885	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		886	conf->nodename, (const char *)si);
		887
767	const sockinfo &dsi = forward_si (si);	888	const sockinfo &dsi = forward_si (si);
768		889
769	slow = slow \|\| (dsi.prot & PROT_SLOW);	890	slow = slow \|\| (dsi.prot & PROT_SLOW);
770		891
771	if (dsi.valid () && auth_rate_limiter.can (dsi))	892	if (dsi.valid () && auth_rate_limiter.can (dsi))
…		…
775	else	896	else
776	send_ping (dsi, 0);	897	send_ping (dsi, 0);
777	}	898	}
778	}	899	}
779		900
780	retry_int *= slow ? 8. : 0.7;	901	retry_int *= slow ? 8. : 0.9;
781		902
782	if (retry_int < conf->max_retry)	903	if (retry_int < conf->max_retry)
783	retry_cnt++;	904	retry_cnt++;
784	else	905	else
785	retry_int = conf->max_retry;	906	retry_int = conf->max_retry;
786		907
787	w.start (NOW + retry_int);	908	w.start (retry_int);
788	}	909	}
789	}	910	}
790		911
791	void	912	void
792	connection::reset_connection ()	913	connection::reset_connection ()
…		…
795	{	916	{
796	slog (L_INFO, _("%s(%s): connection lost"),	917	slog (L_INFO, _("%s(%s): connection lost"),
797	conf->nodename, (const char *)si);	918	conf->nodename, (const char *)si);
798		919
799	if (::conf.script_node_down)	920	if (::conf.script_node_down)
800	if (!run_script (run_script_cb (this, &connection::script_node_down), false))	921	{
		922	run_script_cb *cb = new run_script_cb;
		923	cb->set<connection, &connection::script_node_down> (this);
801	slog (L_WARN, _("node-down command execution failed, continuing."));	924	run_script_queued (cb, _("node-down command execution failed, continuing."));
		925	}
802	}	926	}
803		927
804	delete ictx; ictx = 0;	928	delete ictx; ictx = 0;
805	delete octx; octx = 0;	929	delete octx; octx = 0;
806	#if ENABLE_DNS
807	dnsv4_reset_connection ();
808	#endif
809		930
810	si.host = 0;	931	si.host = 0;
811		932
812	last_activity = 0;	933	last_activity = 0.;
		934	//last_si_change = 0.;
813	retry_cnt = 0;	935	retry_cnt = 0;
814		936
815	rekey.stop ();	937	rekey.stop ();
816	keepalive.stop ();	938	keepalive.stop ();
817	establish_connection.stop ();	939	establish_connection.stop ();
…		…
824	send_reset (si);	946	send_reset (si);
825		947
826	reset_connection ();	948	reset_connection ();
827	}	949	}
828		950
829	void	951	// poor-man's rekeying
830	connection::rekey_cb (time_watcher &w)	952	inline void
		953	connection::rekey_cb (ev::timer &w, int revents)
831	{	954	{
832	reset_connection ();	955	reset_connection ();
833	establish_connection ();	956	establish_connection ();
834	}	957	}
835		958
…		…
851	if (oseqno > MAX_SEQNO)	974	if (oseqno > MAX_SEQNO)
852	rekey ();	975	rekey ();
853	}	976	}
854		977
855	void	978	void
		979	connection::post_inject_queue ()
		980	{
		981	// force a connection every now and when when packets are sent (max 1/s)
		982	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		983	establish_connection.stop ();
		984
		985	establish_connection ();
		986	}
		987
		988	void
856	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	989	connection::inject_data_packet (tap_packet *pkt)
857	{	990	{
858	if (ictx && octx)	991	if (ictx && octx)
859	send_data_packet (pkt);	992	send_data_packet (pkt);
860	else	993	else
861	{	994	{
862	if (!broadcast)
863	data_queue.put (new tap_packet (*pkt));	995	data_queue.put (new tap_packet (*pkt));
864		996	post_inject_queue ();
865	establish_connection ();
866	}	997	}
867	}	998	}
868		999
		1000	void
869	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1001	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
870	{	1002	{
871	if (ictx && octx)	1003	if (ictx && octx)
872	send_vpn_packet (pkt, si, tos);	1004	send_vpn_packet (pkt, si, tos);
873	else	1005	else
874	{	1006	{
875	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1007	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
876		1008	post_inject_queue ();
877	establish_connection ();
878	}	1009	}
879	}	1010	}
880		1011
881	void	1012	void
882	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1013	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
883	{	1014	{
884	last_activity = NOW;	1015	last_activity = ev_now ();
885		1016
886	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1017	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
887	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1018	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1019
		1020	if (connectmode == conf_node::C_DISABLED)
		1021	return;
888		1022
889	switch (pkt->typ ())	1023	switch (pkt->typ ())
890	{	1024	{
891	case vpn_packet::PT_PING:	1025	case vpn_packet::PT_PING:
		1026	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1027
892	// we send pings instead of auth packets after some retries,	1028	// we send pings instead of auth packets after some retries,
893	// so reset the retry counter and establish a connection	1029	// so reset the retry counter and establish a connection
894	// when we receive a ping.	1030	// when we receive a ping.
895	if (!ictx)	1031	if (!ictx)
896	{	1032	{
897	if (auth_rate_limiter.can (rsi))	1033	if (auth_rate_limiter.can (rsi))
898	send_auth_request (rsi, true);	1034	send_auth_request (rsi, true);
899	}	1035	}
900	else	1036	else
		1037	// we would love to change the socket address here, but ping's aren't
		1038	// authenticated, so we best ignore it.
901	send_ping (rsi, 1); // pong	1039	send_ping (rsi, 1); // pong
902		1040
903	break;	1041	break;
904		1042
905	case vpn_packet::PT_PONG:	1043	case vpn_packet::PT_PONG:
		1044	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1045
		1046	// a PONG might mean that the other side doesn't really know
		1047	// about our desire for communication.
		1048	establish_connection ();
906	break;	1049	break;
907		1050
908	case vpn_packet::PT_RESET:	1051	case vpn_packet::PT_RESET:
909	{	1052	{
910	reset_connection ();	1053	reset_connection ();
911		1054
912	config_packet p = (config_packet ) pkt;	1055	config_packet p = (config_packet ) pkt;
913		1056
914	if (!p->chk_config ())	1057	if (!p->chk_config ())
915	{	1058	{
916	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1059	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
917	conf->nodename, (const char *)rsi);	1060	conf->nodename, (const char *)rsi);
918	connectmode = conf_node::C_DISABLED;	1061	connectmode = conf_node::C_DISABLED;
919	}	1062	}
920	else if (connectmode == conf_node::C_ALWAYS)	1063	else if (connectmode == conf_node::C_ALWAYS)
921	establish_connection ();	1064	establish_connection ();
…		…
923	break;	1066	break;
924		1067
925	case vpn_packet::PT_AUTH_REQ:	1068	case vpn_packet::PT_AUTH_REQ:
926	if (auth_rate_limiter.can (rsi))	1069	if (auth_rate_limiter.can (rsi))
927	{	1070	{
928	auth_req_packet p = (auth_req_packet ) pkt;	1071	auth_req_packet p = (auth_req_packet )pkt;
929		1072
930	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1073	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1074	conf->nodename, p->initiate ? "initiate" : "reply",
		1075	p->protocols, p->features);
931		1076
932	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1077	if (p->chk_config ()
		1078	&& (!memcmp (p->magic, MAGIC_OLD, 8) \|\| !memcmp (p->magic, MAGIC, 8)))
933	{	1079	{
934	if (p->prot_minor != PROTOCOL_MINOR)	1080	if (p->prot_minor != PROTOCOL_MINOR)
935	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1081	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
936	conf->nodename, (const char *)rsi,	1082	conf->nodename, (const char *)rsi,
937	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1083	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
…		…
963		1109
964	break;	1110	break;
965	}	1111	}
966	}	1112	}
967	else	1113	else
968	slog (L_WARN, _("%s(%s): protocol mismatch"),	1114	slog (L_WARN, _("%s(%s): protocol mismatch."),
969	conf->nodename, (const char *)rsi);	1115	conf->nodename, (const char *)rsi);
970		1116
971	send_reset (rsi);	1117	send_reset (rsi);
972	}	1118	}
973		1119
974	break;	1120	break;
975		1121
976	case vpn_packet::PT_AUTH_RES:	1122	case vpn_packet::PT_AUTH_RES:
977	{	1123	{
978	auth_res_packet p = (auth_res_packet ) pkt;	1124	auth_res_packet p = (auth_res_packet )pkt;
979		1125
980	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1126	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
981		1127
982	if (p->chk_config ())	1128	if (p->chk_config ())
983	{	1129	{
984	if (p->prot_minor != PROTOCOL_MINOR)	1130	if (p->prot_minor != PROTOCOL_MINOR)
985	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1131	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
…		…
988		1134
989	rsachallenge chg;	1135	rsachallenge chg;
990		1136
991	if (!rsa_cache.find (p->id, chg))	1137	if (!rsa_cache.find (p->id, chg))
992	{	1138	{
993	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1139	slog (L_ERR, _("%s(%s): unrequested auth response, ignoring."),
994	conf->nodename, (const char *)rsi);	1140	conf->nodename, (const char *)rsi);
995	break;	1141	break;
996	}	1142	}
997	else	1143	else
998	{	1144	{
999	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1145	crypto_ctx *cctx = new crypto_ctx (chg, 0);
1000		1146
1001	if (!p->hmac_chk (cctx))	1147	if (!p->hmac_chk (cctx))
1002	{	1148	{
1003	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"	1149	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1004	"could be an attack, or just corruption or a synchronization error"),	1150	"could be an attack, or just corruption or a synchronization error."),
1005	conf->nodename, (const char *)rsi);	1151	conf->nodename, (const char *)rsi);
1006	break;	1152	break;
1007	}	1153	}
1008	else	1154	else
1009	{	1155	{
…		…
1020	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid	1166	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1021		1167
1022	si = rsi;	1168	si = rsi;
1023	protocol = rsi.prot;	1169	protocol = rsi.prot;
1024		1170
		1171	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		1172	conf->nodename, (const char *)rsi,
		1173	is_direct ? "direct" : "forwarded",
		1174	p->prot_major, p->prot_minor);
		1175
1025	connection_established ();	1176	connection_established ();
1026		1177
1027	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1028	conf->nodename, (const char *)rsi,
1029	p->prot_major, p->prot_minor);
1030
1031	if (::conf.script_node_up)	1178	if (::conf.script_node_up)
1032	if (!run_script (run_script_cb (this, &connection::script_node_up), false))	1179	{
		1180	run_script_cb *cb = new run_script_cb;
		1181	cb->set<connection, &connection::script_node_up> (this);
1033	slog (L_WARN, _("node-up command execution failed, continuing."));	1182	run_script_queued (cb, _("node-up command execution failed, continuing."));
		1183	}
1034		1184
1035	break;	1185	break;
1036	}	1186	}
1037	else	1187	else
1038	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),	1188	slog (L_ERR, _("%s(%s): sent and received challenge do not match."),
1039	conf->nodename, (const char *)rsi);	1189	conf->nodename, (const char *)rsi);
1040	}	1190	}
1041		1191
1042	delete cctx;	1192	delete cctx;
1043	}	1193	}
…		…
1059	{	1209	{
1060	vpndata_packet p = (vpndata_packet )pkt;	1210	vpndata_packet p = (vpndata_packet )pkt;
1061		1211
1062	if (!p->hmac_chk (ictx))	1212	if (!p->hmac_chk (ictx))
1063	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1213	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1064	"could be an attack, or just corruption or a synchronization error"),	1214	"could be an attack, or just corruption or a synchronization error."),
1065	conf->nodename, (const char *)rsi);	1215	conf->nodename, (const char *)rsi);
1066	else	1216	else
1067	{	1217	{
1068	u32 seqno;	1218	u32 seqno;
1069	tap_packet *d = p->unpack (this, seqno);	1219	tap_packet *d = p->unpack (this, seqno);
		1220	int seqclass = iseqno.seqno_classify (seqno);
1070		1221
1071	if (iseqno.recv_ok (seqno))	1222	if (seqclass == 0) // ok
1072	{	1223	{
1073	vpn->tap->send (d);	1224	vpn->tap->send (d);
1074		1225
1075	if (si != rsi)	1226	if (si != rsi)
1076	{	1227	{
1077	// fast re-sync on source address changes, useful especially for tcp/ip	1228	// fast re-sync on source address changes, useful especially for tcp/ip
		1229	//if (last_si_change < ev_now () + 5.)
1078	si = rsi;	1230	// {
1079
1080	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1231	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1081	conf->nodename, (const char )si, (const char )rsi);	1232	conf->nodename, (const char )si, (const char )rsi);
		1233
		1234	si = rsi;
		1235
		1236	if (::conf.script_node_change)
		1237	{
		1238	run_script_cb *cb = new run_script_cb;
		1239	cb->set<connection, &connection::script_node_change> (this);
		1240	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1241	}
		1242
		1243	// }
		1244	//else
		1245	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1246	// conf->nodename, (const char )si, (const char )rsi);
1082	}	1247	}
		1248	}
		1249	else if (seqclass == 1) // far history
		1250	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1251	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1252	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1253	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1254	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1255	else if (seqclass == 3) // reset
		1256	{
		1257	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1258	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1259	send_reset (rsi);
1083	}	1260	}
1084		1261
1085	delete d;	1262	delete d;
1086	break;	1263	break;
1087	}	1264	}
…		…
1091	break;	1268	break;
1092		1269
1093	case vpn_packet::PT_CONNECT_REQ:	1270	case vpn_packet::PT_CONNECT_REQ:
1094	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1271	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1095	{	1272	{
1096	connect_req_packet p = (connect_req_packet ) pkt;	1273	connect_req_packet p = (connect_req_packet )pkt;
1097		1274
1098	if (p->id > 0 && p->id <= vpn->conns.size ())	1275	if (p->id > 0 && p->id <= vpn->conns.size ())
1099	{	1276	{
1100	connection *c = vpn->conns[p->id - 1];	1277	connection *c = vpn->conns[p->id - 1];
1101	conf->protocols = p->protocols;	1278	conf->protocols = p->protocols;
1102		1279
1103	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]",	1280	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1281	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1282	p->protocols,
1104	conf->id, p->id, c->ictx && c->octx);	1283	c->ictx && c->octx);
1105		1284
1106	if (c->ictx && c->octx)	1285	if (c->ictx && c->octx)
1107	{	1286	{
1108	// send connect_info packets to both sides, in case one is	1287	// send connect_info packets to both sides, in case one is
1109	// behind a nat firewall (or both ;)	1288	// behind a nat firewall (or both ;)
…		…
1132		1311
1133	c->conf->protocols = p->protocols;	1312	c->conf->protocols = p->protocols;
1134	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1313	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1135	p->si.upgrade_protocol (protocol, c->conf);	1314	p->si.upgrade_protocol (protocol, c->conf);
1136		1315
1137	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1316	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1138	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1317	conf->nodename,
		1318	vpn->conns[p->id - 1]->conf->nodename,
		1319	(const char *)p->si,
		1320	p->protocols,
		1321	protocol,
		1322	p->si.supported_protocols (c->conf),
		1323	!c->ictx && !c->octx);
1139		1324
1140	const sockinfo &dsi = forward_si (p->si);	1325	const sockinfo &dsi = forward_si (p->si);
1141		1326
1142	if (dsi.valid ())	1327	if (dsi.valid ())
1143	c->send_auth_request (dsi, true);	1328	c->send_auth_request (dsi, true);
		1329	else
		1330	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1331	vpn->conns[p->id - 1]->conf->nodename,
		1332	(const char *)p->si);
1144	}	1333	}
1145	else	1334	else
1146	slog (L_WARN,	1335	slog (L_WARN,
1147	_("received authenticated connection request from unknown node #%d, config file mismatch?"),	1336	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
1148	p->id);	1337	p->id);
…		…
1154	send_reset (rsi);	1343	send_reset (rsi);
1155	break;	1344	break;
1156	}	1345	}
1157	}	1346	}
1158		1347
1159	void connection::keepalive_cb (time_watcher &w)	1348	inline void
		1349	connection::keepalive_cb (ev::timer &w, int revents)
1160	{	1350	{
1161	if (NOW >= last_activity + ::conf.keepalive + 30)	1351	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1352
		1353	if (when >= 0)
		1354	w.start (when);
		1355	else if (when < -15)
1162	{	1356	{
1163	reset_connection ();	1357	reset_connection ();
1164	establish_connection ();	1358	establish_connection ();
1165	}	1359	}
1166	else if (NOW < last_activity + ::conf.keepalive)
1167	w.start (last_activity + ::conf.keepalive);
1168	else if (conf->connectmode != conf_node::C_ONDEMAND	1360	else if (conf->connectmode != conf_node::C_ONDEMAND
1169	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1361	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1170	{	1362	{
		1363	w.start (3);
1171	send_ping (si);	1364	send_ping (si);
1172	w.start (NOW + 5);
1173	}	1365	}
1174	else if (NOW < last_activity + ::conf.keepalive + 10)	1366	else if (when >= -10)
1175	// hold ondemand connections implicitly a few seconds longer	1367	// hold ondemand connections implicitly a few seconds longer
1176	// should delete octx, though, or something like that ;)	1368	// should delete octx, though, or something like that ;)
1177	w.start (last_activity + ::conf.keepalive + 10);	1369	w.start (when + 10);
1178	else	1370	else
1179	reset_connection ();	1371	reset_connection ();
1180	}	1372	}
1181		1373
		1374	void
1182	void connection::send_connect_request (int id)	1375	connection::send_connect_request (int id)
1183	{	1376	{
1184	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1377	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1185		1378
1186	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1379	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1380	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1381	THISNODE->protocols);
1187	p->hmac_set (octx);	1382	p->hmac_set (octx);
1188	send_vpn_packet (p, si);	1383	send_vpn_packet (p, si);
1189		1384
1190	delete p;	1385	delete p;
1191	}	1386	}
1192		1387
		1388	void
1193	void connection::script_init_env (const char *ext)	1389	connection::script_init_env (const char *ext)
1194	{	1390	{
1195	char *env;	1391	char *env;
1196	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);	1392	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1197	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);	1393	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1198	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,	1394	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1199	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,	1395	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1200	conf->id & 0xff); putenv (env);	1396	conf->id & 0xff); putenv (env);
1201	}	1397	}
1202		1398
		1399	void
1203	void connection::script_init_connect_env ()	1400	connection::script_init_connect_env ()
1204	{	1401	{
1205	vpn->script_init_env ();	1402	vpn->script_init_env ();
1206		1403
1207	char *env;	1404	char *env;
1208	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1405	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1406	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1209	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1407	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1210	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1408	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1211	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1409	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1212	}	1410	}
1213		1411
		1412	inline const char *
1214	const char *connection::script_node_up ()	1413	connection::script_node_up ()
1215	{	1414	{
1216	script_init_connect_env ();	1415	script_init_connect_env ();
1217		1416
1218	putenv ("STATE=up");	1417	putenv ((char *)"STATE=up");
1219		1418
1220	char *filename;	1419	char *filename;
1221	asprintf (&filename,	1420	asprintf (&filename,
1222	"%s/%s",	1421	"%s/%s",
1223	confbase,	1422	confbase,
1224	::conf.script_node_up ? ::conf.script_node_up : "node-up");	1423	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1225		1424
1226	return filename;	1425	return filename;
1227	}	1426	}
1228		1427
1229	const char *connection::script_node_down ()	1428	inline const char *
		1429	connection::script_node_change ()
1230	{	1430	{
1231	script_init_connect_env ();	1431	script_init_connect_env ();
1232		1432
		1433	putenv ((char *)"STATE=change");
		1434
		1435	char *filename;
		1436	asprintf (&filename,
		1437	"%s/%s",
		1438	confbase,
		1439	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1440
		1441	return filename;
		1442	}
		1443
		1444	inline const char *
		1445	connection::script_node_down ()
		1446	{
		1447	script_init_connect_env ();
		1448
1233	putenv ("STATE=down");	1449	putenv ((char *)"STATE=down");
1234		1450
1235	char *filename;	1451	char *filename;
1236	asprintf (&filename,	1452	asprintf (&filename,
1237	"%s/%s",	1453	"%s/%s",
1238	confbase,	1454	confbase,
…		…
1240		1456
1241	return filename;	1457	return filename;
1242	}	1458	}
1243		1459
1244	connection::connection (struct vpn vpn, conf_node conf)	1460	connection::connection (struct vpn vpn, conf_node conf)
1245	: vpn(vpn), conf(conf)	1461	: vpn(vpn), conf(conf),
1246	, rekey (this, &connection::rekey_cb)
1247	, keepalive (this, &connection::keepalive_cb)
1248	, establish_connection (this, &connection::establish_connection_cb)
1249	#if ENABLE_DNS	1462	#if ENABLE_DNS
1250	, dns (0)	1463	dns (0),
1251	#endif	1464	#endif
		1465	data_queue(conf->max_ttl, conf->max_queue + 1),
		1466	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1252	{	1467	{
		1468	rekey .set<connection, &connection::rekey_cb > (this);
		1469	keepalive .set<connection, &connection::keepalive_cb > (this);
		1470	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1471
		1472	last_establish_attempt = 0.;
1253	octx = ictx = 0;	1473	octx = ictx = 0;
1254	retry_cnt = 0;
1255		1474
1256	if (!conf->protocols) // make sure some protocol is enabled	1475	connectmode = conf->connectmode;
1257	conf->protocols = PROT_UDPv4;
1258		1476
1259	connectmode = conf_node::C_ALWAYS; // initial setting	1477	// queue a dummy packet to force an initial connection attempt
		1478	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1479	vpn_queue.put (new net_packet);
		1480
1260	reset_connection ();	1481	reset_connection ();
1261	}	1482	}
1262		1483
1263	connection::~connection ()	1484	connection::~connection ()
1264	{	1485	{
1265	shutdown ();	1486	shutdown ();
1266	}	1487	}
1267		1488
		1489	void
1268	void connection_init ()	1490	connection_init ()
1269	{	1491	{
1270	auth_rate_limiter.clear ();	1492	auth_rate_limiter.clear ();
1271	reset_rate_limiter.clear ();	1493	reset_rate_limiter.clear ();
1272	}	1494	}
1273		1495

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Comparing gvpe/src/connection.C (file contents): Revision 1.59 by pcg, Mon Dec 5 12:58:09 2005 UTC vs. Revision 1.97 by root, Tue Dec 4 13:23:17 2012 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.59 by pcg, Mon Dec 5 12:58:09 2005 UTC vs.
Revision 1.97 by root, Tue Dec 4 13:23:17 2012 UTC