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

Comparing gvpe/src/connection.C (file contents):
Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 UTC vs.
Revision 1.82 by pcg, Fri Aug 15 18:35:24 2008 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com>	3	Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
4		4
		5	This file is part of GVPE.
		6
5	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
6	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
7	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
8	(at your option) any later version.	10	option) any later version.
9		11
10	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
11	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13	GNU General Public License for more details.	15	Public License for more details.
14		16
15	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
16	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
17	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 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.
18	*/	30	*/
19		31
20	#include "config.h"	32	#include "config.h"
21		33
22	#include <cassert>
23
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>
30
31	#include "gettext.h"
32		42
33	#include "conf.h"	43	#include "conf.h"
34	#include "slog.h"	44	#include "slog.h"
35	#include "device.h"	45	#include "device.h"
36	#include "vpn.h"	46	#include "vpn.h"
47	#define ULTRA_FAST 1	57	#define ULTRA_FAST 1
48	#define HLOG 15	58	#define HLOG 15
49	#include "lzf/lzf.h"	59	#include "lzf/lzf.h"
50	#include "lzf/lzf_c.c"	60	#include "lzf/lzf_c.c"
51	#include "lzf/lzf_d.c"	61	#include "lzf/lzf_d.c"
		62
		63	//////////////////////////////////////////////////////////////////////////////
		64
		65	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		66	static ev::child rs_child_ev;
		67
		68	void // c++ requires external linkage here, apparently :(
		69	rs_child_cb (ev::child &w, int revents)
		70	{
		71	w.stop ();
		72
		73	if (rs_queue.empty ())
		74	return;
		75
		76	pid_t pid = run_script (*rs_queue.front ().first, false);
		77	if (pid)
		78	{
		79	w.set (pid);
		80	w.start ();
		81	}
		82	else
		83	slog (L_WARN, rs_queue.front ().second);
		84
		85	delete rs_queue.front ().first;
		86	rs_queue.pop ();
		87	}
		88
		89	// despite the fancy name, this is quite a hack
		90	static void
		91	run_script_queued (run_script_cb cb, const char warnmsg)
		92	{
		93	rs_queue.push (std::make_pair (cb, warnmsg));
		94
		95	if (!rs_child_ev.is_active ())
		96	{
		97	rs_child_ev.set<rs_child_cb> ();
		98	rs_child_ev ();
		99	}
		100	}
		101
		102	//////////////////////////////////////////////////////////////////////////////
52		103
53	struct crypto_ctx	104	struct crypto_ctx
54	{	105	{
55	EVP_CIPHER_CTX cctx;	106	EVP_CIPHER_CTX cctx;
56	HMAC_CTX hctx;	107	HMAC_CTX hctx;
…		…
84	require (EVP_DigestUpdate(&ctx, &id, sizeof id));	135	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
85	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	136	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
86	EVP_MD_CTX_cleanup (&ctx);	137	EVP_MD_CTX_cleanup (&ctx);
87	}	138	}
88		139
89	struct rsa_entry {	140	struct rsa_entry
		141	{
90	tstamp expire;	142	tstamp expire;
91	rsaid id;	143	rsaid id;
92	rsachallenge chg;	144	rsachallenge chg;
93	};	145	};
94		146
95	struct rsa_cache : list<rsa_entry>	147	struct rsa_cache : list<rsa_entry>
96	{	148	{
97	void cleaner_cb (time_watcher &w); time_watcher cleaner;	149	inline void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;
98		150
99	bool find (const rsaid &id, rsachallenge &chg)	151	bool find (const rsaid &id, rsachallenge &chg)
100	{	152	{
101	for (iterator i = begin (); i != end (); ++i)	153	for (iterator i = begin (); i != end (); ++i)
102	{	154	{
103	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)	155	if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev_now ())
104	{	156	{
105	memcpy (&chg, &i->chg, sizeof chg);	157	memcpy (&chg, &i->chg, sizeof chg);
106		158
107	erase (i);	159	erase (i);
108	return true;	160	return true;
109	}	161	}
110	}	162	}
111		163
112	if (cleaner.at < NOW)	164	if (!cleaner.is_active ())
113	cleaner.start (NOW + RSA_TTL);	165	cleaner.again ();
114		166
115	return false;	167	return false;
116	}	168	}
117		169
118	void gen (rsaid &id, rsachallenge &chg)	170	void gen (rsaid &id, rsachallenge &chg)
119	{	171	{
120	rsa_entry e;	172	rsa_entry e;
121		173
122	RAND_bytes ((unsigned char *)&id, sizeof id);	174	RAND_bytes ((unsigned char *)&id, sizeof id);
123	RAND_bytes ((unsigned char *)&chg, sizeof chg);	175	RAND_bytes ((unsigned char *)&chg, sizeof chg);
124		176
125	e.expire = NOW + RSA_TTL;	177	e.expire = ev_now () + RSA_TTL;
126	e.id = id;	178	e.id = id;
127	memcpy (&e.chg, &chg, sizeof chg);	179	memcpy (&e.chg, &chg, sizeof chg);
128		180
129	push_back (e);	181	push_back (e);
130		182
131	if (cleaner.at < NOW)	183	if (!cleaner.is_active ())
132	cleaner.start (NOW + RSA_TTL);	184	cleaner.again ();
133	}	185	}
134		186
135	rsa_cache ()	187	rsa_cache ()
136	: cleaner (this, &rsa_cache::cleaner_cb)	188	{
137	{ }	189	cleaner.set<rsa_cache, &rsa_cache::cleaner_cb> (this);
		190	cleaner.set (RSA_TTL, RSA_TTL);
		191	}
138		192
139	} rsa_cache;	193	} rsa_cache;
140		194
141	void rsa_cache::cleaner_cb (time_watcher &w)	195	void rsa_cache::cleaner_cb (ev::timer &w, int revents)
142	{	196	{
143	if (!empty ())	197	if (empty ())
		198	w.stop ();
		199	else
144	{	200	{
145	w.start (NOW + RSA_TTL);
146
147	for (iterator i = begin (); i != end (); )	201	for (iterator i = begin (); i != end (); )
148	if (i->expire <= NOW)	202	if (i->expire <= ev_now ())
149	i = erase (i);	203	i = erase (i);
150	else	204	else
151	++i;	205	++i;
152	}	206	}
153	}	207	}
154		208
155	//////////////////////////////////////////////////////////////////////////////	209	//////////////////////////////////////////////////////////////////////////////
156		210
157	void pkt_queue::put (net_packet *p)	211	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		212	: max_ttl (max_ttl), max_queue (max_queue)
158	{	213	{
159	if (queue[i])	214	queue = new pkt [max_queue];
160	{
161	delete queue[i];
162	j = (j + 1) % QUEUEDEPTH;
163	}
164		215
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;	216	i = 0;
187	j = 0;	217	j = 0;
		218
		219	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
188	}	220	}
189		221
190	pkt_queue::~pkt_queue ()	222	pkt_queue::~pkt_queue ()
191	{	223	{
192	for (i = QUEUEDEPTH; --i > 0; )	224	while (net_packet *p = get ())
		225	delete p;
		226
193	delete queue[i];	227	delete [] queue;
194	}	228	}
195		229
		230	void pkt_queue::expire_cb (ev::timer &w, int revents)
		231	{
		232	ev_tstamp expire = ev_now () - max_ttl;
		233
		234	for (;;)
		235	{
		236	if (empty ())
		237	break;
		238
		239	double diff = queue[j].tstamp - expire;
		240
		241	if (diff >= 0.)
		242	{
		243	w.start (diff > 0.5 ? diff : 0.5);
		244	break;
		245	}
		246
		247	delete get ();
		248	}
		249	}
		250
		251	void pkt_queue::put (net_packet *p)
		252	{
		253	ev_tstamp now = ev_now ();
		254
		255	// start expiry timer
		256	if (empty ())
		257	expire.start (max_ttl);
		258
		259	int ni = i + 1 == max_queue ? 0 : i + 1;
		260
		261	if (ni == j)
		262	delete get ();
		263
		264	queue[i].pkt = p;
		265	queue[i].tstamp = now;
		266
		267	i = ni;
		268	}
		269
		270	net_packet *pkt_queue::get ()
		271	{
		272	if (empty ())
		273	return 0;
		274
		275	net_packet *p = queue[j].pkt;
		276	queue[j].pkt = 0;
		277
		278	j = j + 1 == max_queue ? 0 : j + 1;
		279
		280	return p;
		281	}
		282
196	struct net_rateinfo {	283	struct net_rateinfo
		284	{
197	u32 host;	285	u32 host;
198	double pcnt, diff;	286	double pcnt, diff;
199	tstamp last;	287	tstamp last;
200	};	288	};
201		289
202	// only do action once every x seconds per host whole allowing bursts.	290	// only do action once every x seconds per host whole allowing bursts.
203	// this implementation ("splay list" ;) is inefficient,	291	// this implementation ("splay list" ;) is inefficient,
204	// but low on resources.	292	// but low on resources.
205	struct net_rate_limiter : list<net_rateinfo>	293	struct net_rate_limiter : list<net_rateinfo>
206	{	294	{
207	static const double ALPHA = 1. - 1. / 600.; // allow bursts	295	# define NRL_ALPHA (1. - 1. / 600.) // allow bursts
208	static const double CUTOFF = 10.; // one event every CUTOFF seconds	296	# define NRL_CUTOFF 10. // one event every CUTOFF seconds
209	static const double EXPIRE = CUTOFF * 30.; // expire entries after this time	297	# define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time
210	static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value	298	# define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value
211		299
212	bool can (const sockinfo &si) { return can((u32)si.host); }	300	bool can (const sockinfo &si) { return can((u32)si.host); }
213	bool can (u32 host);	301	bool can (u32 host);
214	};	302	};
215		303
…		…
220	iterator i;	308	iterator i;
221		309
222	for (i = begin (); i != end (); )	310	for (i = begin (); i != end (); )
223	if (i->host == host)	311	if (i->host == host)
224	break;	312	break;
225	else if (i->last < NOW - EXPIRE)	313	else if (i->last < ev_now () - NRL_EXPIRE)
226	i = erase (i);	314	i = erase (i);
227	else	315	else
228	i++;	316	i++;
229		317
230	if (i == end ())	318	if (i == end ())
231	{	319	{
232	net_rateinfo ri;	320	net_rateinfo ri;
233		321
234	ri.host = host;	322	ri.host = host;
235	ri.pcnt = 1.;	323	ri.pcnt = 1.;
236	ri.diff = MAXDIF;	324	ri.diff = NRL_MAXDIF;
237	ri.last = NOW;	325	ri.last = ev_now ();
238		326
239	push_front (ri);	327	push_front (ri);
240		328
241	return true;	329	return true;
242	}	330	}
243	else	331	else
244	{	332	{
245	net_rateinfo ri (*i);	333	net_rateinfo ri (*i);
246	erase (i);	334	erase (i);
247		335
248	ri.pcnt = ri.pcnt * ALPHA;	336	ri.pcnt = ri.pcnt * NRL_ALPHA;
249	ri.diff = ri.diff * ALPHA + (NOW - ri.last);	337	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
250		338
251	ri.last = NOW;	339	ri.last = ev_now ();
252		340
253	double dif = ri.diff / ri.pcnt;	341	double dif = ri.diff / ri.pcnt;
254		342
255	bool send = dif > CUTOFF;	343	bool send = dif > NRL_CUTOFF;
256		344
257	if (dif > MAXDIF)	345	if (dif > NRL_MAXDIF)
258	{	346	{
259	ri.pcnt = 1.;	347	ri.pcnt = 1.;
260	ri.diff = MAXDIF;	348	ri.diff = NRL_MAXDIF;
261	}	349	}
262	else if (send)	350	else if (send)
263	ri.pcnt++;	351	ri.pcnt++;
264		352
265	push_front (ri);	353	push_front (ri);
…		…
456	u8 flags, challengelen, features, pad3;	544	u8 flags, challengelen, features, pad3;
457	u32 cipher_nid, digest_nid, hmac_nid;	545	u32 cipher_nid, digest_nid, hmac_nid;
458		546
459	void setup (ptype type, int dst);	547	void setup (ptype type, int dst);
460	bool chk_config () const;	548	bool chk_config () const;
		549
		550	static u8 get_features ()
		551	{
		552	u8 f = 0;
		553	#if ENABLE_COMPRESSION
		554	f \|= FEATURE_COMPRESSION;
		555	#endif
		556	#if ENABLE_ROHC
		557	f \|= FEATURE_ROHC;
		558	#endif
		559	#if ENABLE_BRIDGING
		560	f \|= FEATURE_BRIDGING;
		561	#endif
		562	return f;
		563	}
461	};	564	};
462
463	#define FEATURES ((ENABLE_COMPRESSION ? FEATURE_COMPRESSION : 0) \
464	\| (ENABLE_ROHC ? FEATURE_ROHC : 0))
465		565
466	void config_packet::setup (ptype type, int dst)	566	void config_packet::setup (ptype type, int dst)
467	{	567	{
468	prot_major = PROTOCOL_MAJOR;	568	prot_major = PROTOCOL_MAJOR;
469	prot_minor = PROTOCOL_MINOR;	569	prot_minor = PROTOCOL_MINOR;
470	randsize = RAND_SIZE;	570	randsize = RAND_SIZE;
471	hmaclen = HMACLENGTH;	571	hmaclen = HMACLENGTH;
472	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;	572	flags = 0;
473	challengelen = sizeof (rsachallenge);	573	challengelen = sizeof (rsachallenge);
474	features = FEATURES;	574	features = get_features ();
475		575
476	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	576	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));
477	digest_nid = htonl (EVP_MD_type (RSA_HASH));	577	digest_nid = htonl (EVP_MD_type (RSA_HASH));
478	hmac_nid = htonl (EVP_MD_type (DIGEST));	578	hmac_nid = htonl (EVP_MD_type (DIGEST));
479		579
…		…
487	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	587	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
488	else if (randsize != RAND_SIZE)	588	else if (randsize != RAND_SIZE)
489	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	589	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
490	else if (hmaclen != HMACLENGTH)	590	else if (hmaclen != HMACLENGTH)
491	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);	591	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
492	#if 0 // this implementation should handle all flag settings
493	else if (flags != curflags ())
494	slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ());
495	#endif
496	else if (challengelen != sizeof (rsachallenge))	592	else if (challengelen != sizeof (rsachallenge))
497	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));	593	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
498	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	594	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))
499	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	595	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));
500	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	596	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
…		…
576	/////////////////////////////////////////////////////////////////////////////	672	/////////////////////////////////////////////////////////////////////////////
577		673
578	void	674	void
579	connection::connection_established ()	675	connection::connection_established ()
580	{	676	{
		677	slog (L_NOISE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);
		678
581	if (ictx && octx)	679	if (ictx && octx)
582	{	680	{
583	connectmode = conf->connectmode;	681	// make sure rekeying timeouts are slightly asymmetric
584		682	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
585	rekey.start (NOW + ::conf.rekey);	683	rekey.start (rekey_interval, rekey_interval);
586	keepalive.start (NOW + ::conf.keepalive);	684	keepalive.start (::conf.keepalive);
587		685
588	// send queued packets	686	// send queued packets
589	if (ictx && octx)	687	if (ictx && octx)
590	{	688	{
591	while (tap_packet p = (tap_packet )data_queue.get ())	689	while (tap_packet p = (tap_packet )data_queue.get ())
592	{	690	{
593	send_data_packet (p);	691	if (p->len) send_data_packet (p);
594	delete p;	692	delete p;
595	}	693	}
596		694
597	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	695	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
598	{	696	{
599	send_vpn_packet (p, si, IPTOS_RELIABILITY);	697	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
600	delete p;	698	delete p;
601	}	699	}
602	}	700	}
		701
		702	vpn->connection_established (this);
603	}	703	}
604	else	704	else
605	{	705	{
606	retry_cnt = 0;	706	retry_cnt = 0;
607	establish_connection.start (NOW + 5);	707	establish_connection.start (5);
608	keepalive.stop ();	708	keepalive.stop ();
609	rekey.stop ();	709	rekey.stop ();
610	}	710	}
611	}	711	}
612		712
613	void	713	void
614	connection::reset_si ()	714	connection::reset_si ()
615	{	715	{
		716	if (vpn->can_direct (THISNODE, conf))
616	protocol = best_protocol (THISNODE->protocols & conf->protocols);	717	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
617		718	else
618	// mask out protocols we cannot establish	719	{
619	if (!conf->udp_port) protocol &= ~PROT_UDPv4;	720	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
620	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;	721	protocol = 0;
		722	}
621		723
622	si.set (conf, protocol);	724	si.set (conf, protocol);
		725
		726	is_direct = si.valid ();
623	}	727	}
624		728
625	// ensure sockinfo is valid, forward if necessary	729	// ensure sockinfo is valid, forward if necessary
626	const sockinfo &	730	const sockinfo &
627	connection::forward_si (const sockinfo &si) const	731	connection::forward_si (const sockinfo &si) const
628	{	732	{
629	if (!si.valid ())	733	if (!si.valid ())
630	{	734	{
631	connection *r = vpn->find_router ();	735	connection *r = vpn->find_router_for (this);
632		736
633	if (r)	737	if (r)
634	{	738	{
635	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	739	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
636	conf->nodename, r->conf->nodename);	740	conf->nodename, r->conf->nodename);
637	return r->si;	741	return r->si;
638	}	742	}
639	else	743	else
640	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	744	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
641	conf->nodename);	745	conf->nodename);
642	}	746	}
643		747
644	return si;	748	return si;
645	}	749	}
…		…
655	connection::send_ping (const sockinfo &si, u8 pong)	759	connection::send_ping (const sockinfo &si, u8 pong)
656	{	760	{
657	ping_packet *pkt = new ping_packet;	761	ping_packet *pkt = new ping_packet;
658		762
659	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	763	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		764
		765	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
		766
660	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	767	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
661		768
662	delete pkt;	769	delete pkt;
663	}	770	}
664		771
…		…
683		790
684	rsachallenge chg;	791	rsachallenge chg;
685	rsa_cache.gen (pkt->id, chg);	792	rsa_cache.gen (pkt->id, chg);
686	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	793	rsa_encrypt (conf->rsa_key, chg, pkt->encr);
687		794
688	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	795	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
689		796
690	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	797	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
691		798
692	delete pkt;	799	delete pkt;
693	}	800	}
…		…
701		808
702	rsa_hash (id, chg, pkt->response);	809	rsa_hash (id, chg, pkt->response);
703		810
704	pkt->hmac_set (octx);	811	pkt->hmac_set (octx);
705		812
706	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	813	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
707		814
708	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	815	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
709		816
710	delete pkt;	817	delete pkt;
711	}	818	}
712		819
713	void	820	void
714	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	821	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
715	{	822	{
716	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	823	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s)", conf->nodename,
717	conf->id, rid, (const char *)rsi);	824	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi);
718		825
719	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	826	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
720		827
721	r->hmac_set (octx);	828	r->hmac_set (octx);
722	send_vpn_packet (r, si);	829	send_vpn_packet (r, si);
723		830
724	delete r;	831	delete r;
725	}	832	}
726		833
727	void	834	inline void
728	connection::establish_connection_cb (time_watcher &w)	835	connection::establish_connection_cb (ev::timer &w, int revents)
729	{	836	{
730	if (!ictx	837	if (!ictx
731	&& conf != THISNODE	838	&& conf != THISNODE
732	&& connectmode != conf_node::C_NEVER	839	&& connectmode != conf_node::C_NEVER
733	&& connectmode != conf_node::C_DISABLED	840	&& connectmode != conf_node::C_DISABLED
734	&& NOW > w.at)	841	&& !w.is_active ())
735	{	842	{
736	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	843	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
737		844	// and stop trying. should probably be handled by a per-connection expire handler.
738	if (retry_int < 3600 * 8)	845	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		846	{
		847	reset_connection ();
739	retry_cnt++;	848	return;
		849	}
740		850
741	w.start (NOW + retry_int);	851	last_establish_attempt = ev_now ();
		852
		853	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		854	? (retry_cnt & 3) + 1
		855	: 1 << (retry_cnt >> 2));
742		856
743	reset_si ();	857	reset_si ();
744		858
745	if (si.prot && !si.host)	859	bool slow = si.prot & PROT_SLOW;
		860
		861	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		862	{
		863	/TODO/ /* start the timer so we don't recurse endlessly */
		864	w.start (1);
746	vpn->send_connect_request (conf->id);	865	vpn->send_connect_request (this);
		866	}
747	else	867	else
748	{	868	{
		869	if (si.valid ())
		870	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		871	conf->nodename, (const char *)si);
		872
749	const sockinfo &dsi = forward_si (si);	873	const sockinfo &dsi = forward_si (si);
		874
		875	slow = slow \|\| (dsi.prot & PROT_SLOW);
750		876
751	if (dsi.valid () && auth_rate_limiter.can (dsi))	877	if (dsi.valid () && auth_rate_limiter.can (dsi))
752	{	878	{
753	if (retry_cnt < 4)	879	if (retry_cnt < 4)
754	send_auth_request (dsi, true);	880	send_auth_request (dsi, true);
755	else	881	else
756	send_ping (dsi, 0);	882	send_ping (dsi, 0);
757	}	883	}
758	}	884	}
		885
		886	retry_int *= slow ? 8. : 0.9;
		887
		888	if (retry_int < conf->max_retry)
		889	retry_cnt++;
		890	else
		891	retry_int = conf->max_retry;
		892
		893	w.start (retry_int);
759	}	894	}
760	}	895	}
761		896
762	void	897	void
763	connection::reset_connection ()	898	connection::reset_connection ()
…		…
766	{	901	{
767	slog (L_INFO, _("%s(%s): connection lost"),	902	slog (L_INFO, _("%s(%s): connection lost"),
768	conf->nodename, (const char *)si);	903	conf->nodename, (const char *)si);
769		904
770	if (::conf.script_node_down)	905	if (::conf.script_node_down)
771	run_script (run_script_cb (this, &connection::script_node_down), false);	906	{
		907	run_script_cb *cb = new run_script_cb;
		908	cb->set<connection, &connection::script_node_down> (this);
		909	run_script_queued (cb, _("node-down command execution failed, continuing."));
		910	}
772	}	911	}
773		912
774	delete ictx; ictx = 0;	913	delete ictx; ictx = 0;
775	delete octx; octx = 0;	914	delete octx; octx = 0;
		915	#if ENABLE_DNS
		916	dnsv4_reset_connection ();
		917	#endif
776		918
777	si.host= 0;	919	si.host = 0;
778		920
779	last_activity = 0;	921	last_activity = 0.;
		922	//last_si_change = 0.;
780	retry_cnt = 0;	923	retry_cnt = 0;
781		924
782	rekey.stop ();	925	rekey.stop ();
783	keepalive.stop ();	926	keepalive.stop ();
784	establish_connection.stop ();	927	establish_connection.stop ();
…		…
791	send_reset (si);	934	send_reset (si);
792		935
793	reset_connection ();	936	reset_connection ();
794	}	937	}
795		938
796	void	939	// poor-man's rekeying
797	connection::rekey_cb (time_watcher &w)	940	inline void
		941	connection::rekey_cb (ev::timer &w, int revents)
798	{	942	{
799	reset_connection ();	943	reset_connection ();
800	establish_connection ();	944	establish_connection ();
801	}	945	}
802		946
…		…
818	if (oseqno > MAX_SEQNO)	962	if (oseqno > MAX_SEQNO)
819	rekey ();	963	rekey ();
820	}	964	}
821		965
822	void	966	void
		967	connection::post_inject_queue ()
		968	{
		969	// force a connection every now and when when packets are sent (max 1/s)
		970	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		971	establish_connection.stop ();
		972
		973	establish_connection ();
		974	}
		975
		976	void
823	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	977	connection::inject_data_packet (tap_packet *pkt)
824	{	978	{
825	if (ictx && octx)	979	if (ictx && octx)
826	send_data_packet (pkt);	980	send_data_packet (pkt);
827	else	981	else
828	{	982	{
829	if (!broadcast)//DDDD
830	data_queue.put (new tap_packet (*pkt));	983	data_queue.put (new tap_packet (*pkt));
831		984	post_inject_queue ();
832	establish_connection ();
833	}	985	}
834	}	986	}
835		987
836	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	988	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)
837	{	989	{
838	if (ictx && octx)	990	if (ictx && octx)
839	send_vpn_packet (pkt, si, tos);	991	send_vpn_packet (pkt, si, tos);
840	else	992	else
841	{	993	{
842	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	994	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
843		995	post_inject_queue ();
844	establish_connection ();
845	}	996	}
846	}	997	}
847		998
848	void	999	void
849	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1000	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
850	{	1001	{
851	last_activity = NOW;	1002	last_activity = ev_now ();
852		1003
853	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1004	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
854	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1005	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1006
		1007	if (connectmode == conf_node::C_DISABLED)
		1008	return;
855		1009
856	switch (pkt->typ ())	1010	switch (pkt->typ ())
857	{	1011	{
858	case vpn_packet::PT_PING:	1012	case vpn_packet::PT_PING:
		1013	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1014
859	// we send pings instead of auth packets after some retries,	1015	// we send pings instead of auth packets after some retries,
860	// so reset the retry counter and establish a connection	1016	// so reset the retry counter and establish a connection
861	// when we receive a ping.	1017	// when we receive a ping.
862	if (!ictx)	1018	if (!ictx)
863	{	1019	{
864	if (auth_rate_limiter.can (rsi))	1020	if (auth_rate_limiter.can (rsi))
865	send_auth_request (rsi, true);	1021	send_auth_request (rsi, true);
866	}	1022	}
867	else	1023	else
		1024	// we would love to change thre socket address here, but ping's aren't
		1025	// authenticated, so we best ignore it.
868	send_ping (rsi, 1); // pong	1026	send_ping (rsi, 1); // pong
869		1027
870	break;	1028	break;
871		1029
872	case vpn_packet::PT_PONG:	1030	case vpn_packet::PT_PONG:
		1031	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
873	break;	1032	break;
874		1033
875	case vpn_packet::PT_RESET:	1034	case vpn_packet::PT_RESET:
876	{	1035	{
877	reset_connection ();	1036	reset_connection ();
878		1037
879	config_packet p = (config_packet ) pkt;	1038	config_packet p = (config_packet ) pkt;
880		1039
881	if (!p->chk_config ())	1040	if (!p->chk_config ())
882	{	1041	{
883	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1042	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
884	conf->nodename, (const char *)rsi);	1043	conf->nodename, (const char *)rsi);
885	connectmode = conf_node::C_DISABLED;	1044	connectmode = conf_node::C_DISABLED;
886	}	1045	}
887	else if (connectmode == conf_node::C_ALWAYS)	1046	else if (connectmode == conf_node::C_ALWAYS)
888	establish_connection ();	1047	establish_connection ();
…		…
892	case vpn_packet::PT_AUTH_REQ:	1051	case vpn_packet::PT_AUTH_REQ:
893	if (auth_rate_limiter.can (rsi))	1052	if (auth_rate_limiter.can (rsi))
894	{	1053	{
895	auth_req_packet p = (auth_req_packet ) pkt;	1054	auth_req_packet p = (auth_req_packet ) pkt;
896		1055
897	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1056	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s)", conf->nodename, p->initiate ? "initiate" : "reply");
898		1057
899	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1058	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))
900	{	1059	{
901	if (p->prot_minor != PROTOCOL_MINOR)	1060	if (p->prot_minor != PROTOCOL_MINOR)
902	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1061	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
…		…
919	delete octx;	1078	delete octx;
920		1079
921	octx = new crypto_ctx (k, 1);	1080	octx = new crypto_ctx (k, 1);
922	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1081	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;
923		1082
924	// compatibility code, remove when no longer required
925	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
926
927	conf->protocols = p->protocols;	1083	conf->protocols = p->protocols;
928	features = p->features & FEATURES;	1084	features = p->features & config_packet::get_features ();
929		1085
930	send_auth_response (rsi, p->id, k);	1086	send_auth_response (rsi, p->id, k);
931		1087
932	connection_established ();	1088	connection_established ();
933		1089
934	break;	1090	break;
935	}	1091	}
936	}	1092	}
937	else	1093	else
938	slog (L_WARN, _("%s(%s): protocol mismatch"),	1094	slog (L_WARN, _("%s(%s): protocol mismatch."),
939	conf->nodename, (const char *)rsi);	1095	conf->nodename, (const char *)rsi);
940		1096
941	send_reset (rsi);	1097	send_reset (rsi);
942	}	1098	}
943		1099
944	break;	1100	break;
945		1101
946	case vpn_packet::PT_AUTH_RES:	1102	case vpn_packet::PT_AUTH_RES:
947	{	1103	{
948	auth_res_packet p = (auth_res_packet ) pkt;	1104	auth_res_packet p = (auth_res_packet )pkt;
949		1105
950	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1106	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
951		1107
952	if (p->chk_config ())	1108	if (p->chk_config ())
953	{	1109	{
954	if (p->prot_minor != PROTOCOL_MINOR)	1110	if (p->prot_minor != PROTOCOL_MINOR)
955	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1111	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
…		…
958		1114
959	rsachallenge chg;	1115	rsachallenge chg;
960		1116
961	if (!rsa_cache.find (p->id, chg))	1117	if (!rsa_cache.find (p->id, chg))
962	{	1118	{
963	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1119	slog (L_ERR, _("%s(%s): unrequested auth response, ignoring."),
964	conf->nodename, (const char *)rsi);	1120	conf->nodename, (const char *)rsi);
965	break;	1121	break;
966	}	1122	}
967	else	1123	else
968	{	1124	{
969	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1125	crypto_ctx *cctx = new crypto_ctx (chg, 0);
970		1126
971	if (!p->hmac_chk (cctx))	1127	if (!p->hmac_chk (cctx))
972	{	1128	{
973	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"	1129	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
974	"could be an attack, or just corruption or a synchronization error"),	1130	"could be an attack, or just corruption or a synchronization error."),
975	conf->nodename, (const char *)rsi);	1131	conf->nodename, (const char *)rsi);
976	break;	1132	break;
977	}	1133	}
978	else	1134	else
979	{	1135	{
…		…
990	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid	1146	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
991		1147
992	si = rsi;	1148	si = rsi;
993	protocol = rsi.prot;	1149	protocol = rsi.prot;
994		1150
		1151	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		1152	conf->nodename, (const char *)rsi,
		1153	is_direct ? "direct" : "forwarded",
		1154	p->prot_major, p->prot_minor);
		1155
995	connection_established ();	1156	connection_established ();
996		1157
997	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
998	conf->nodename, (const char *)rsi,
999	p->prot_major, p->prot_minor);
1000
1001	if (::conf.script_node_up)	1158	if (::conf.script_node_up)
1002	run_script (run_script_cb (this, &connection::script_node_up), false);	1159	{
		1160	run_script_cb *cb = new run_script_cb;
		1161	cb->set<connection, &connection::script_node_up> (this);
		1162	run_script_queued (cb, _("node-up command execution failed, continuing."));
		1163	}
1003		1164
1004	break;	1165	break;
1005	}	1166	}
1006	else	1167	else
1007	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),	1168	slog (L_ERR, _("%s(%s): sent and received challenge do not match."),
1008	conf->nodename, (const char *)rsi);	1169	conf->nodename, (const char *)rsi);
1009	}	1170	}
1010		1171
1011	delete cctx;	1172	delete cctx;
1012	}	1173	}
…		…
1028	{	1189	{
1029	vpndata_packet p = (vpndata_packet )pkt;	1190	vpndata_packet p = (vpndata_packet )pkt;
1030		1191
1031	if (!p->hmac_chk (ictx))	1192	if (!p->hmac_chk (ictx))
1032	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1193	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1033	"could be an attack, or just corruption or a synchronization error"),	1194	"could be an attack, or just corruption or a synchronization error."),
1034	conf->nodename, (const char *)rsi);	1195	conf->nodename, (const char *)rsi);
1035	else	1196	else
1036	{	1197	{
1037	u32 seqno;	1198	u32 seqno;
1038	tap_packet *d = p->unpack (this, seqno);	1199	tap_packet *d = p->unpack (this, seqno);
		1200	int seqclass = iseqno.seqno_classify (seqno);
1039		1201
1040	if (iseqno.recv_ok (seqno))	1202	if (seqclass == 0) // ok
1041	{	1203	{
1042	vpn->tap->send (d);	1204	vpn->tap->send (d);
1043		1205
1044	if (si != rsi)	1206	if (si != rsi)
1045	{	1207	{
1046	// fast re-sync on connection changes, useful especially for tcp/ip	1208	// fast re-sync on source address changes, useful especially for tcp/ip
		1209	//if (last_si_change < ev_now () + 5.)
1047	si = rsi;	1210	// {
1048
1049	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1211	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1050	conf->nodename, (const char )si, (const char )rsi);	1212	conf->nodename, (const char )si, (const char )rsi);
		1213
		1214	si = rsi;
		1215	// }
		1216	//else
		1217	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1218	// conf->nodename, (const char )si, (const char )rsi);
1051	}	1219	}
1052
1053	delete d;
1054
1055	break;
1056	}	1220	}
		1221	else if (seqclass == 1) // far history
		1222	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1223	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1224	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1225	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1226	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1227	else if (seqclass == 3) // reset
		1228	{
		1229	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1230	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1231	send_reset (rsi);
		1232	}
		1233
		1234	delete d;
		1235	break;
1057	}	1236	}
1058	}	1237	}
1059		1238
1060	send_reset (rsi);	1239	send_reset (rsi);
1061	break;	1240	break;
…		…
1063	case vpn_packet::PT_CONNECT_REQ:	1242	case vpn_packet::PT_CONNECT_REQ:
1064	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1243	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1065	{	1244	{
1066	connect_req_packet p = (connect_req_packet ) pkt;	1245	connect_req_packet p = (connect_req_packet ) pkt;
1067		1246
1068	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1247	if (p->id > 0 && p->id <= vpn->conns.size ())
1069	connection *c = vpn->conns[p->id - 1];
1070	conf->protocols = p->protocols;
1071
1072	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1073	conf->id, p->id, c->ictx && c->octx);
1074
1075	if (c->ictx && c->octx)
1076	{	1248	{
		1249	connection *c = vpn->conns[p->id - 1];
		1250	conf->protocols = p->protocols;
		1251
		1252	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s) [%d]",
		1253	conf->nodename, vpn->conns[p->id - 1]->conf->nodename, c->ictx && c->octx);
		1254
		1255	if (c->ictx && c->octx)
		1256	{
1077	// send connect_info packets to both sides, in case one is	1257	// send connect_info packets to both sides, in case one is
1078	// behind a nat firewall (or both ;)	1258	// behind a nat firewall (or both ;)
1079	c->send_connect_info (conf->id, si, conf->protocols);	1259	c->send_connect_info (conf->id, si, conf->protocols);
1080	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1260	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1261	}
		1262	else
		1263	c->establish_connection ();
1081	}	1264	}
1082	else	1265	else
1083	c->establish_connection ();	1266	slog (L_WARN,
		1267	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1268	p->id);
1084	}	1269	}
1085		1270
1086	break;	1271	break;
1087		1272
1088	case vpn_packet::PT_CONNECT_INFO:	1273	case vpn_packet::PT_CONNECT_INFO:
1089	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1274	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1090	{	1275	{
1091	connect_info_packet p = (connect_info_packet ) pkt;	1276	connect_info_packet p = (connect_info_packet )pkt;
1092		1277
1093	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1278	if (p->id > 0 && p->id <= vpn->conns.size ())
1094		1279	{
1095	connection *c = vpn->conns[p->id - 1];	1280	connection *c = vpn->conns[p->id - 1];
1096		1281
1097	c->conf->protocols = p->protocols;	1282	c->conf->protocols = p->protocols;
1098	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1283	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1099	p->si.upgrade_protocol (protocol, c->conf);	1284	p->si.upgrade_protocol (protocol, c->conf);
1100		1285
1101	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1286	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s) [%d]",
		1287	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
1102	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1288	(const char *)p->si, !c->ictx && !c->octx);
1103		1289
1104	const sockinfo &dsi = forward_si (p->si);	1290	const sockinfo &dsi = forward_si (p->si);
1105		1291
1106	if (dsi.valid ())	1292	if (dsi.valid ())
1107	c->send_auth_request (dsi, true);	1293	c->send_auth_request (dsi, true);
		1294	}
		1295	else
		1296	slog (L_WARN,
		1297	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1298	p->id);
1108	}	1299	}
1109		1300
1110	break;	1301	break;
1111		1302
1112	default:	1303	default:
1113	send_reset (rsi);	1304	send_reset (rsi);
1114	break;	1305	break;
1115	}	1306	}
1116	}	1307	}
1117		1308
1118	void connection::keepalive_cb (time_watcher &w)	1309	inline void
		1310	connection::keepalive_cb (ev::timer &w, int revents)
1119	{	1311	{
1120	if (NOW >= last_activity + ::conf.keepalive + 30)	1312	if (ev_now () >= last_activity + ::conf.keepalive + 30)
1121	{	1313	{
1122	reset_connection ();	1314	reset_connection ();
1123	establish_connection ();	1315	establish_connection ();
1124	}	1316	}
1125	else if (NOW < last_activity + ::conf.keepalive)	1317	else if (ev_now () < last_activity + ::conf.keepalive)
1126	w.start (last_activity + ::conf.keepalive);	1318	w.start (last_activity + ::conf.keepalive - ev::now ());
1127	else if (conf->connectmode != conf_node::C_ONDEMAND	1319	else if (conf->connectmode != conf_node::C_ONDEMAND
1128	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1320	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1129	{	1321	{
1130	send_ping (si);	1322	send_ping (si);
1131	w.start (NOW + 5);	1323	w.start (5);
1132	}	1324	}
1133	else if (NOW < last_activity + ::conf.keepalive + 10)	1325	else if (ev_now () < last_activity + ::conf.keepalive + 10)
1134	// hold ondemand connections implicitly a few seconds longer	1326	// hold ondemand connections implicitly a few seconds longer
1135	// should delete octx, though, or something like that ;)	1327	// should delete octx, though, or something like that ;)
1136	w.start (last_activity + ::conf.keepalive + 10);	1328	w.start (last_activity + ::conf.keepalive + 10 - ev::now ());
1137	else	1329	else
1138	reset_connection ();	1330	reset_connection ();
1139	}	1331	}
1140		1332
1141	void connection::send_connect_request (int id)	1333	void connection::send_connect_request (int id)
1142	{	1334	{
1143	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1335	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);
1144		1336
1145	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1337	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s)",
		1338	conf->nodename, vpn->conns[id - 1]->conf->nodename);
1146	p->hmac_set (octx);	1339	p->hmac_set (octx);
1147	send_vpn_packet (p, si);	1340	send_vpn_packet (p, si);
1148		1341
1149	delete p;	1342	delete p;
1150	}	1343	}
1151		1344
		1345	void connection::script_init_env (const char *ext)
		1346	{
		1347	char *env;
		1348	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1349	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1350	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1351	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1352	conf->id & 0xff); putenv (env);
		1353	}
		1354
1152	void connection::script_node ()	1355	void connection::script_init_connect_env ()
1153	{	1356	{
1154	vpn->script_if_up ();	1357	vpn->script_init_env ();
1155		1358
1156	char *env;	1359	char *env;
1157	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1360	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
1158	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1361	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1159	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1362	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1160	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1363	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1161	}	1364	}
1162		1365
		1366	inline const char *
1163	const char *connection::script_node_up ()	1367	connection::script_node_up ()
1164	{	1368	{
1165	script_node ();	1369	script_init_connect_env ();
1166		1370
1167	putenv ("STATE=up");	1371	putenv ((char *)"STATE=up");
1168		1372
		1373	char *filename;
		1374	asprintf (&filename,
		1375	"%s/%s",
		1376	confbase,
1169	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1377	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1170	}
1171		1378
		1379	return filename;
		1380	}
		1381
		1382	inline const char *
1172	const char *connection::script_node_down ()	1383	connection::script_node_down ()
1173	{	1384	{
1174	script_node ();	1385	script_init_connect_env ();
1175		1386
1176	putenv ("STATE=down");	1387	putenv ((char *)"STATE=down");
1177		1388
1178	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1389	char *filename;
1179	}	1390	asprintf (&filename,
		1391	"%s/%s",
		1392	confbase,
		1393	::conf.script_node_down ? ::conf.script_node_down : "node-down");
1180		1394
		1395	return filename;
		1396	}
		1397
1181	connection::connection(struct vpn *vpn_)	1398	connection::connection (struct vpn vpn, conf_node conf)
1182	: vpn(vpn_)	1399	: vpn(vpn), conf(conf),
1183	, rekey (this, &connection::rekey_cb)	1400	#if ENABLE_DNS
1184	, keepalive (this, &connection::keepalive_cb)	1401	dns (0),
		1402	#endif
		1403	data_queue(conf->max_ttl, conf->max_queue + 1),
		1404	vpn_queue(conf->max_ttl, conf->max_queue + 1)
		1405	{
		1406	rekey .set<connection, &connection::rekey_cb > (this);
		1407	keepalive .set<connection, &connection::keepalive_cb > (this);
1185	, establish_connection (this, &connection::establish_connection_cb)	1408	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1186	{	1409
		1410	last_establish_attempt = 0.;
1187	octx = ictx = 0;	1411	octx = ictx = 0;
1188	retry_cnt = 0;
1189		1412
1190	connectmode = conf_node::C_ALWAYS; // initial setting	1413	if (!conf->protocols) // make sure some protocol is enabled
		1414	conf->protocols = PROT_UDPv4;
		1415
		1416	connectmode = conf->connectmode;
		1417
		1418	// queue a dummy packet to force an initial connection attempt
		1419	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1420	vpn_queue.put (new net_packet);
		1421
1191	reset_connection ();	1422	reset_connection ();
1192	}	1423	}
1193		1424
1194	connection::~connection ()	1425	connection::~connection ()
1195	{	1426	{

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Comparing gvpe/src/connection.C (file contents): Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 UTC vs. Revision 1.82 by pcg, Fri Aug 15 18:35:24 2008 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 UTC vs.
Revision 1.82 by pcg, Fri Aug 15 18:35:24 2008 UTC