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

Comparing gvpe/src/connection.C (file contents):
Revision 1.70 by pcg, Thu Aug 7 19:07:02 2008 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) 2003-2008 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 it	7	GVPE is free software; you can redistribute it and/or modify it
8	under the terms of the GNU General Public License as published by the	8	under the terms of the GNU General Public License as published by the
50		50
51	#if !HAVE_RAND_PSEUDO_BYTES	51	#if !HAVE_RAND_PSEUDO_BYTES
52	# define RAND_pseudo_bytes RAND_bytes	52	# define RAND_pseudo_bytes RAND_bytes
53	#endif	53	#endif
54		54
55	#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)
56		57
57	#define ULTRA_FAST 1	58	#define ULTRA_FAST 1
58	#define HLOG 15	59	#define HLOG 15
59	#include "lzf/lzf.h"	60	#include "lzf/lzf.h"
60	#include "lzf/lzf_c.c"	61	#include "lzf/lzf_c.c"
…		…
63	//////////////////////////////////////////////////////////////////////////////	64	//////////////////////////////////////////////////////////////////////////////
64		65
65	static std::queue< std::pair<run_script_cb , const char > > rs_queue;	66	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
66	static ev::child rs_child_ev;	67	static ev::child rs_child_ev;
67		68
		69	namespace
		70	{
68	void // c++ requires external linkage here, apparently :(	71	void // c++ requires external linkage here, apparently :(
69	rs_child_cb (ev::child &w, int revents)	72	rs_child_cb (ev::child &w, int revents)
70	{	73	{
71	w.stop ();	74	w.stop ();
72		75
73	if (rs_queue.empty ())	76	if (rs_queue.empty ())
74	return;	77	return;
75		78
76	pid_t pid = run_script (*rs_queue.front ().first, false);	79	pid_t pid = run_script (*rs_queue.front ().first, false);
77	if (pid)	80	if (pid)
78	{	81	{
79	w.set (pid);	82	w.set (pid);
80	w.start ();	83	w.start ();
81	}	84	}
82	else	85	else
83	slog (L_WARN, rs_queue.front ().second);	86	slog (L_WARN, rs_queue.front ().second);
84		87
85	delete rs_queue.front ().first;	88	delete rs_queue.front ().first;
86	rs_queue.pop ();	89	rs_queue.pop ();
87	}	90	}
		91	};
88		92
89	// despite the fancy name, this is quite a hack	93	// despite the fancy name, this is quite a hack
90	static void	94	static void
91	run_script_queued (run_script_cb cb, const char warnmsg)	95	run_script_queued (run_script_cb cb, const char warnmsg)
92	{	96	{
…		…
128	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	132	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)
129	{	133	{
130	EVP_MD_CTX ctx;	134	EVP_MD_CTX ctx;
131		135
132	EVP_MD_CTX_init (&ctx);	136	EVP_MD_CTX_init (&ctx);
133	require (EVP_DigestInit (&ctx, RSA_HASH));	137	require (EVP_DigestInit (&ctx, RSA_HASH));
134	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));	138	require (EVP_DigestUpdate (&ctx, &chg, sizeof chg));
135	require (EVP_DigestUpdate(&ctx, &id, sizeof id));	139	require (EVP_DigestUpdate (&ctx, &id, sizeof id));
136	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	140	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
137	EVP_MD_CTX_cleanup (&ctx);	141	EVP_MD_CTX_cleanup (&ctx);
138	}	142	}
139		143
140	struct rsa_entry	144	struct rsa_entry
141	{	145	{
…		…
190	cleaner.set (RSA_TTL, RSA_TTL);	194	cleaner.set (RSA_TTL, RSA_TTL);
191	}	195	}
192		196
193	} rsa_cache;	197	} rsa_cache;
194		198
		199	void
195	void rsa_cache::cleaner_cb (ev::timer &w, int revents)	200	rsa_cache::cleaner_cb (ev::timer &w, int revents)
196	{	201	{
197	if (empty ())	202	if (empty ())
198	w.stop ();	203	w.stop ();
199	else	204	else
200	{	205	{
…		…
225	delete p;	230	delete p;
226		231
227	delete [] queue;	232	delete [] queue;
228	}	233	}
229		234
		235	void
230	void pkt_queue::expire_cb (ev::timer &w, int revents)	236	pkt_queue::expire_cb (ev::timer &w, int revents)
231	{	237	{
232	ev_tstamp expire = ev_now () - max_ttl;	238	ev_tstamp expire = ev_now () - max_ttl;
233		239
234	for (;;)	240	for (;;)
235	{	241	{
…		…
246		252
247	delete get ();	253	delete get ();
248	}	254	}
249	}	255	}
250		256
		257	void
251	void pkt_queue::put (net_packet *p)	258	pkt_queue::put (net_packet *p)
252	{	259	{
253	ev_tstamp now = ev_now ();	260	ev_tstamp now = ev_now ();
254		261
255	// start expiry timer	262	// start expiry timer
256	if (empty ())	263	if (empty ())
…		…
265	queue[i].tstamp = now;	272	queue[i].tstamp = now;
266		273
267	i = ni;	274	i = ni;
268	}	275	}
269		276
270	net_packet *pkt_queue::get ()	277	net_packet *
		278	pkt_queue::get ()
271	{	279	{
272	if (empty ())	280	if (empty ())
273	return 0;	281	return 0;
274		282
275	net_packet *p = queue[j].pkt;	283	net_packet *p = queue[j].pkt;
…		…
299		307
300	bool can (const sockinfo &si) { return can((u32)si.host); }	308	bool can (const sockinfo &si) { return can((u32)si.host); }
301	bool can (u32 host);	309	bool can (u32 host);
302	};	310	};
303		311
304	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	312	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
305		313
		314	bool
306	bool net_rate_limiter::can (u32 host)	315	net_rate_limiter::can (u32 host)
307	{	316	{
308	iterator i;	317	iterator i;
309		318
310	for (i = begin (); i != end (); )	319	for (i = begin (); i != end (); )
311	if (i->host == host)	320	if (i->host == host)
…		…
358		367
359	/////////////////////////////////////////////////////////////////////////////	368	/////////////////////////////////////////////////////////////////////////////
360		369
361	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	370	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
362		371
		372	void
363	void hmac_packet::hmac_gen (crypto_ctx *ctx)	373	hmac_packet::hmac_gen (crypto_ctx *ctx)
364	{	374	{
365	unsigned int xlen;	375	unsigned int xlen;
366		376
367	HMAC_CTX *hctx = &ctx->hctx;	377	HMAC_CTX *hctx = &ctx->hctx;
368		378
…		…
386	hmac_gen (ctx);	396	hmac_gen (ctx);
387		397
388	return !memcmp (hmac, hmac_digest, HMACLENGTH);	398	return !memcmp (hmac, hmac_digest, HMACLENGTH);
389	}	399	}
390		400
		401	void
391	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	402	vpn_packet::set_hdr (ptype type_, unsigned int dst)
392	{	403	{
393	type = type_;	404	type = type_;
394		405
395	int src = THISNODE->id;	406	int src = THISNODE->id;
396		407
…		…
401		412
402	#define MAXVPNDATA (MAX_MTU - 6 - 6)	413	#define MAXVPNDATA (MAX_MTU - 6 - 6)
403	#define DATAHDR (sizeof (u32) + RAND_SIZE)	414	#define DATAHDR (sizeof (u32) + RAND_SIZE)
404		415
405	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
406	{	425	{
407	u8 data[MAXVPNDATA + DATAHDR]; // seqno
408
409	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
410	tap_packet unpack (connection conn, u32 &seqno);
411	private:
412
413	const u32 data_hdr_size () const
414	{
415	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	426	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
416	}
417	};	427	}
		428	};
418		429
419	void	430	void
420	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)
421	{	432	{
422	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	433	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
424	ptype type = PT_DATA_UNCOMPRESSED;	435	ptype type = PT_DATA_UNCOMPRESSED;
425		436
426	#if ENABLE_COMPRESSION	437	#if ENABLE_COMPRESSION
427	u8 cdata[MAX_MTU];	438	u8 cdata[MAX_MTU];
428		439
429	if (conn->features & ENABLE_COMPRESSION)	440	if (conn->features & FEATURE_COMPRESSION)
430	{	441	{
431	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	442	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
432		443
433	if (cl)	444	if (cl)
434	{	445	{
…		…
561	#endif	572	#endif
562	return f;	573	return f;
563	}	574	}
564	};	575	};
565		576
		577	void
566	void config_packet::setup (ptype type, int dst)	578	config_packet::setup (ptype type, int dst)
567	{	579	{
568	prot_major = PROTOCOL_MAJOR;	580	prot_major = PROTOCOL_MAJOR;
569	prot_minor = PROTOCOL_MINOR;	581	prot_minor = PROTOCOL_MINOR;
570	randsize = RAND_SIZE;	582	randsize = RAND_SIZE;
571	hmaclen = HMACLENGTH;	583	hmaclen = HMACLENGTH;
…		…
579		591
580	len = sizeof (*this) - sizeof (net_packet);	592	len = sizeof (*this) - sizeof (net_packet);
581	set_hdr (type, dst);	593	set_hdr (type, dst);
582	}	594	}
583		595
		596	bool
584	bool config_packet::chk_config () const	597	config_packet::chk_config () const
585	{	598	{
586	if (prot_major != PROTOCOL_MAJOR)	599	if (prot_major != PROTOCOL_MAJOR)
587	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);
588	else if (randsize != RAND_SIZE)	601	else if (randsize != RAND_SIZE)
589	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);
…		…
613	rsaencrdata encr;	626	rsaencrdata encr;
614		627
615	auth_req_packet (int dst, bool initiate_, u8 protocols_)	628	auth_req_packet (int dst, bool initiate_, u8 protocols_)
616	{	629	{
617	config_packet::setup (PT_AUTH_REQ, dst);	630	config_packet::setup (PT_AUTH_REQ, dst);
618	strncpy (magic, MAGIC, 8);	631	strncpy (magic, MAGIC_OLD, 8);
619	initiate = !!initiate_;	632	initiate = !!initiate_;
620	protocols = protocols_;	633	protocols = protocols_;
621		634
622	len = sizeof (*this) - sizeof (net_packet);	635	len = sizeof (*this) - sizeof (net_packet);
623	}	636	}
…		…
672	/////////////////////////////////////////////////////////////////////////////	685	/////////////////////////////////////////////////////////////////////////////
673		686
674	void	687	void
675	connection::connection_established ()	688	connection::connection_established ()
676	{	689	{
677	slog (L_TRACE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);	690	slog (L_NOISE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);
678		691
679	if (ictx && octx)	692	if (ictx && octx)
680	{	693	{
681	// make sure rekeying timeouts are slightly asymmetric	694	// make sure rekeying timeouts are slightly asymmetric
682	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);	695	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
683	rekey.start (rekey_interval, rekey_interval);	696	rekey.start (rekey_interval, rekey_interval);
		697
684	keepalive.start (::conf.keepalive);	698	keepalive.start (::conf.keepalive);
685		699
686	// send queued packets	700	// send queued packets
687	if (ictx && octx)	701	if (ictx && octx)
688	{	702	{
…		…
696	{	710	{
697	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);	711	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
698	delete p;	712	delete p;
699	}	713	}
700	}	714	}
		715
		716	vpn->connection_established (this);
701	}	717	}
702	else	718	else
703	{	719	{
704	retry_cnt = 0;	720	retry_cnt = 0;
705	establish_connection.start (5);	721	establish_connection.start (5);
…		…
709	}	725	}
710		726
711	void	727	void
712	connection::reset_si ()	728	connection::reset_si ()
713	{	729	{
		730	if (vpn->can_direct (THISNODE, conf))
714	protocol = best_protocol (THISNODE->protocols & conf->protocols);	731	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
715		732	else
716	// mask out protocols we cannot establish
717	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
718	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
719	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
720
721	if (protocol
722	&& (!conf->can_direct (THISNODE)
723	\|\| !THISNODE->can_direct (conf)))
724	{	733	{
725	slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename);	734	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
726	protocol = 0;	735	protocol = 0;
727	}	736	}
728		737
729	si.set (conf, protocol);	738	si.set (conf, protocol);
		739
		740	is_direct = si.valid ();
730	}	741	}
731		742
732	// ensure sockinfo is valid, forward if necessary	743	// ensure sockinfo is valid, forward if necessary
733	const sockinfo &	744	const sockinfo &
734	connection::forward_si (const sockinfo &si) const	745	connection::forward_si (const sockinfo &si) const
735	{	746	{
736	if (!si.valid ())	747	if (!si.valid ())
737	{	748	{
738	connection *r = vpn->find_router ();	749	connection *r = vpn->find_router_for (this);
739		750
740	if (r)	751	if (r)
741	{	752	{
742	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."),
743	conf->nodename, r->conf->nodename, (const char *)r->si);	754	conf->nodename, r->conf->nodename);
744	return r->si;	755	return r->si;
745	}	756	}
746	else	757	else
747	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	758	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
748	conf->nodename);	759	conf->nodename);
749	}	760	}
750		761
751	return si;	762	return si;
752	}	763	}
…		…
762	connection::send_ping (const sockinfo &si, u8 pong)	773	connection::send_ping (const sockinfo &si, u8 pong)
763	{	774	{
764	ping_packet *pkt = new ping_packet;	775	ping_packet *pkt = new ping_packet;
765		776
766	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
767	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	781	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
768		782
769	delete pkt;	783	delete pkt;
770	}	784	}
771		785
…		…
790		804
791	rsachallenge chg;	805	rsachallenge chg;
792	rsa_cache.gen (pkt->id, chg);	806	rsa_cache.gen (pkt->id, chg);
793	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	807	rsa_encrypt (conf->rsa_key, chg, pkt->encr);
794		808
795	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);
796		810
797	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
798		812
799	delete pkt;	813	delete pkt;
800	}	814	}
…		…
808		822
809	rsa_hash (id, chg, pkt->response);	823	rsa_hash (id, chg, pkt->response);
810		824
811	pkt->hmac_set (octx);	825	pkt->hmac_set (octx);
812		826
813	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);
814		828
815	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
816		830
817	delete pkt;	831	delete pkt;
818	}	832	}
819		833
820	void	834	void
821	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	835	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
822	{	836	{
823	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)",	837	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
824	conf->id, rid, (const char *)rsi);	838	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		839	conf->protocols);
825		840
826	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);
827		842
828	r->hmac_set (octx);	843	r->hmac_set (octx);
829	send_vpn_packet (r, si);	844	send_vpn_packet (r, si);
…		…
832	}	847	}
833		848
834	inline void	849	inline void
835	connection::establish_connection_cb (ev::timer &w, int revents)	850	connection::establish_connection_cb (ev::timer &w, int revents)
836	{	851	{
837	if (!ictx	852	if (!(ictx && octx)
838	&& conf != THISNODE	853	&& conf != THISNODE
839	&& connectmode != conf_node::C_NEVER	854	&& connectmode != conf_node::C_NEVER
840	&& connectmode != conf_node::C_DISABLED	855	&& connectmode != conf_node::C_DISABLED
841	&& !w.is_active ())	856	&& !w.is_active ())
842	{	857	{
…		…
856		871
857	reset_si ();	872	reset_si ();
858		873
859	bool slow = si.prot & PROT_SLOW;	874	bool slow = si.prot & PROT_SLOW;
860		875
861	if (si.prot && !si.host)	876	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
862	{	877	{
863	slog (L_TRACE, _("%s: connection request (indirect)"), conf->nodename);
864	/TODO/ /* start the timer so we don't recurse endlessly */	878	/TODO/ /* start the timer so we don't recurse endlessly */
865	w.start (1);	879	w.start (1);
866	vpn->send_connect_request (conf->id);	880	vpn->send_connect_request (this);
867	}	881	}
868	else	882	else
869	{	883	{
870	slog (L_TRACE, _("%s: connection request (direct)"), conf->nodename, !!ictx, !!octx);	884	if (si.valid ())
		885	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		886	conf->nodename, (const char *)si);
871		887
872	const sockinfo &dsi = forward_si (si);	888	const sockinfo &dsi = forward_si (si);
873		889
874	slow = slow \|\| (dsi.prot & PROT_SLOW);	890	slow = slow \|\| (dsi.prot & PROT_SLOW);
875		891
…		…
909	}	925	}
910	}	926	}
911		927
912	delete ictx; ictx = 0;	928	delete ictx; ictx = 0;
913	delete octx; octx = 0;	929	delete octx; octx = 0;
914	#if ENABLE_DNS
915	dnsv4_reset_connection ();
916	#endif
917		930
918	si.host = 0;	931	si.host = 0;
919		932
920	last_activity = 0;	933	last_activity = 0.;
		934	//last_si_change = 0.;
921	retry_cnt = 0;	935	retry_cnt = 0;
922		936
923	rekey.stop ();	937	rekey.stop ();
924	keepalive.stop ();	938	keepalive.stop ();
925	establish_connection.stop ();	939	establish_connection.stop ();
…		…
932	send_reset (si);	946	send_reset (si);
933		947
934	reset_connection ();	948	reset_connection ();
935	}	949	}
936		950
		951	// poor-man's rekeying
937	inline void	952	inline void
938	connection::rekey_cb (ev::timer &w, int revents)	953	connection::rekey_cb (ev::timer &w, int revents)
939	{	954	{
940	reset_connection ();	955	reset_connection ();
941	establish_connection ();	956	establish_connection ();
…		…
980	data_queue.put (new tap_packet (*pkt));	995	data_queue.put (new tap_packet (*pkt));
981	post_inject_queue ();	996	post_inject_queue ();
982	}	997	}
983	}	998	}
984		999
		1000	void
985	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1001	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
986	{	1002	{
987	if (ictx && octx)	1003	if (ictx && octx)
988	send_vpn_packet (pkt, si, tos);	1004	send_vpn_packet (pkt, si, tos);
989	else	1005	else
990	{	1006	{
…		…
996	void	1012	void
997	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1013	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
998	{	1014	{
999	last_activity = ev_now ();	1015	last_activity = ev_now ();
1000		1016
1001	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.",
1002	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1018	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
1003		1019
1004	if (connectmode == conf_node::C_DISABLED)	1020	if (connectmode == conf_node::C_DISABLED)
1005	return;	1021	return;
1006		1022
1007	switch (pkt->typ ())	1023	switch (pkt->typ ())
1008	{	1024	{
1009	case vpn_packet::PT_PING:	1025	case vpn_packet::PT_PING:
		1026	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1027
1010	// we send pings instead of auth packets after some retries,	1028	// we send pings instead of auth packets after some retries,
1011	// so reset the retry counter and establish a connection	1029	// so reset the retry counter and establish a connection
1012	// when we receive a ping.	1030	// when we receive a ping.
1013	if (!ictx)	1031	if (!ictx)
1014	{	1032	{
1015	if (auth_rate_limiter.can (rsi))	1033	if (auth_rate_limiter.can (rsi))
1016	send_auth_request (rsi, true);	1034	send_auth_request (rsi, true);
1017	}	1035	}
1018	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.
1019	send_ping (rsi, 1); // pong	1039	send_ping (rsi, 1); // pong
1020		1040
1021	break;	1041	break;
1022		1042
1023	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 ();
1024	break;	1049	break;
1025		1050
1026	case vpn_packet::PT_RESET:	1051	case vpn_packet::PT_RESET:
1027	{	1052	{
1028	reset_connection ();	1053	reset_connection ();
1029		1054
1030	config_packet p = (config_packet ) pkt;	1055	config_packet p = (config_packet ) pkt;
1031		1056
1032	if (!p->chk_config ())	1057	if (!p->chk_config ())
1033	{	1058	{
1034	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1059	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
1035	conf->nodename, (const char *)rsi);	1060	conf->nodename, (const char *)rsi);
1036	connectmode = conf_node::C_DISABLED;	1061	connectmode = conf_node::C_DISABLED;
1037	}	1062	}
1038	else if (connectmode == conf_node::C_ALWAYS)	1063	else if (connectmode == conf_node::C_ALWAYS)
1039	establish_connection ();	1064	establish_connection ();
…		…
1041	break;	1066	break;
1042		1067
1043	case vpn_packet::PT_AUTH_REQ:	1068	case vpn_packet::PT_AUTH_REQ:
1044	if (auth_rate_limiter.can (rsi))	1069	if (auth_rate_limiter.can (rsi))
1045	{	1070	{
1046	auth_req_packet p = (auth_req_packet ) pkt;	1071	auth_req_packet p = (auth_req_packet )pkt;
1047		1072
1048	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);
1049		1076
1050	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)))
1051	{	1079	{
1052	if (p->prot_minor != PROTOCOL_MINOR)	1080	if (p->prot_minor != PROTOCOL_MINOR)
1053	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."),
1054	conf->nodename, (const char *)rsi,	1082	conf->nodename, (const char *)rsi,
1055	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1083	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
…		…
1081		1109
1082	break;	1110	break;
1083	}	1111	}
1084	}	1112	}
1085	else	1113	else
1086	slog (L_WARN, _("%s(%s): protocol mismatch"),	1114	slog (L_WARN, _("%s(%s): protocol mismatch."),
1087	conf->nodename, (const char *)rsi);	1115	conf->nodename, (const char *)rsi);
1088		1116
1089	send_reset (rsi);	1117	send_reset (rsi);
1090	}	1118	}
1091		1119
1092	break;	1120	break;
1093		1121
1094	case vpn_packet::PT_AUTH_RES:	1122	case vpn_packet::PT_AUTH_RES:
1095	{	1123	{
1096	auth_res_packet p = (auth_res_packet ) pkt;	1124	auth_res_packet p = (auth_res_packet )pkt;
1097		1125
1098	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1126	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
1099		1127
1100	if (p->chk_config ())	1128	if (p->chk_config ())
1101	{	1129	{
1102	if (p->prot_minor != PROTOCOL_MINOR)	1130	if (p->prot_minor != PROTOCOL_MINOR)
1103	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."),
…		…
1106		1134
1107	rsachallenge chg;	1135	rsachallenge chg;
1108		1136
1109	if (!rsa_cache.find (p->id, chg))	1137	if (!rsa_cache.find (p->id, chg))
1110	{	1138	{
1111	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1139	slog (L_ERR, _("%s(%s): unrequested auth response, ignoring."),
1112	conf->nodename, (const char *)rsi);	1140	conf->nodename, (const char *)rsi);
1113	break;	1141	break;
1114	}	1142	}
1115	else	1143	else
1116	{	1144	{
1117	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1145	crypto_ctx *cctx = new crypto_ctx (chg, 0);
1118		1146
1119	if (!p->hmac_chk (cctx))	1147	if (!p->hmac_chk (cctx))
1120	{	1148	{
1121	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"
1122	"could be an attack, or just corruption or a synchronization error"),	1150	"could be an attack, or just corruption or a synchronization error."),
1123	conf->nodename, (const char *)rsi);	1151	conf->nodename, (const char *)rsi);
1124	break;	1152	break;
1125	}	1153	}
1126	else	1154	else
1127	{	1155	{
…		…
1138	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
1139		1167
1140	si = rsi;	1168	si = rsi;
1141	protocol = rsi.prot;	1169	protocol = rsi.prot;
1142		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
1143	connection_established ();	1176	connection_established ();
1144
1145	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1146	conf->nodename, (const char *)rsi,
1147	p->prot_major, p->prot_minor);
1148		1177
1149	if (::conf.script_node_up)	1178	if (::conf.script_node_up)
1150	{	1179	{
1151	run_script_cb *cb = new run_script_cb;	1180	run_script_cb *cb = new run_script_cb;
1152	cb->set<connection, &connection::script_node_up> (this);	1181	cb->set<connection, &connection::script_node_up> (this);
…		…
1154	}	1183	}
1155		1184
1156	break;	1185	break;
1157	}	1186	}
1158	else	1187	else
1159	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."),
1160	conf->nodename, (const char *)rsi);	1189	conf->nodename, (const char *)rsi);
1161	}	1190	}
1162		1191
1163	delete cctx;	1192	delete cctx;
1164	}	1193	}
…		…
1180	{	1209	{
1181	vpndata_packet p = (vpndata_packet )pkt;	1210	vpndata_packet p = (vpndata_packet )pkt;
1182		1211
1183	if (!p->hmac_chk (ictx))	1212	if (!p->hmac_chk (ictx))
1184	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"
1185	"could be an attack, or just corruption or a synchronization error"),	1214	"could be an attack, or just corruption or a synchronization error."),
1186	conf->nodename, (const char *)rsi);	1215	conf->nodename, (const char *)rsi);
1187	else	1216	else
1188	{	1217	{
1189	u32 seqno;	1218	u32 seqno;
1190	tap_packet *d = p->unpack (this, seqno);	1219	tap_packet *d = p->unpack (this, seqno);
		1220	int seqclass = iseqno.seqno_classify (seqno);
1191		1221
1192	if (iseqno.recv_ok (seqno))	1222	if (seqclass == 0) // ok
1193	{	1223	{
1194	vpn->tap->send (d);	1224	vpn->tap->send (d);
1195		1225
1196	if (si != rsi)	1226	if (si != rsi)
1197	{	1227	{
1198	// 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.)
1199	si = rsi;	1230	// {
1200
1201	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1231	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1202	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);
1203	}	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);
1204	}	1260	}
1205		1261
1206	delete d;	1262	delete d;
1207	break;	1263	break;
1208	}	1264	}
…		…
1212	break;	1268	break;
1213		1269
1214	case vpn_packet::PT_CONNECT_REQ:	1270	case vpn_packet::PT_CONNECT_REQ:
1215	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1271	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1216	{	1272	{
1217	connect_req_packet p = (connect_req_packet ) pkt;	1273	connect_req_packet p = (connect_req_packet )pkt;
1218		1274
1219	if (p->id > 0 && p->id <= vpn->conns.size ())	1275	if (p->id > 0 && p->id <= vpn->conns.size ())
1220	{	1276	{
1221	connection *c = vpn->conns[p->id - 1];	1277	connection *c = vpn->conns[p->id - 1];
1222	conf->protocols = p->protocols;	1278	conf->protocols = p->protocols;
1223		1279
1224	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,
1225	conf->id, p->id, c->ictx && c->octx);	1283	c->ictx && c->octx);
1226		1284
1227	if (c->ictx && c->octx)	1285	if (c->ictx && c->octx)
1228	{	1286	{
1229	// send connect_info packets to both sides, in case one is	1287	// send connect_info packets to both sides, in case one is
1230	// behind a nat firewall (or both ;)	1288	// behind a nat firewall (or both ;)
…		…
1253		1311
1254	c->conf->protocols = p->protocols;	1312	c->conf->protocols = p->protocols;
1255	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));
1256	p->si.upgrade_protocol (protocol, c->conf);	1314	p->si.upgrade_protocol (protocol, c->conf);
1257		1315
1258	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]",
1259	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);
1260		1324
1261	const sockinfo &dsi = forward_si (p->si);	1325	const sockinfo &dsi = forward_si (p->si);
1262		1326
1263	if (dsi.valid ())	1327	if (dsi.valid ())
1264	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);
1265	}	1333	}
1266	else	1334	else
1267	slog (L_WARN,	1335	slog (L_WARN,
1268	_("received authenticated connection request from unknown node #%d, config file mismatch?"),	1336	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
1269	p->id);	1337	p->id);
…		…
1278	}	1346	}
1279		1347
1280	inline void	1348	inline void
1281	connection::keepalive_cb (ev::timer &w, int revents)	1349	connection::keepalive_cb (ev::timer &w, int revents)
1282	{	1350	{
1283	if (ev_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)
1284	{	1356	{
1285	reset_connection ();	1357	reset_connection ();
1286	establish_connection ();	1358	establish_connection ();
1287	}	1359	}
1288	else if (ev_now () < last_activity + ::conf.keepalive)
1289	w.start (last_activity + ::conf.keepalive - ev::now ());
1290	else if (conf->connectmode != conf_node::C_ONDEMAND	1360	else if (conf->connectmode != conf_node::C_ONDEMAND
1291	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1361	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1292	{	1362	{
		1363	w.start (3);
1293	send_ping (si);	1364	send_ping (si);
1294	w.start (5);
1295	}	1365	}
1296	else if (ev_now () < last_activity + ::conf.keepalive + 10)	1366	else if (when >= -10)
1297	// hold ondemand connections implicitly a few seconds longer	1367	// hold ondemand connections implicitly a few seconds longer
1298	// should delete octx, though, or something like that ;)	1368	// should delete octx, though, or something like that ;)
1299	w.start (last_activity + ::conf.keepalive + 10 - ev::now ());	1369	w.start (when + 10);
1300	else	1370	else
1301	reset_connection ();	1371	reset_connection ();
1302	}	1372	}
1303		1373
		1374	void
1304	void connection::send_connect_request (int id)	1375	connection::send_connect_request (int id)
1305	{	1376	{
1306	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);
1307		1378
1308	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);
1309	p->hmac_set (octx);	1382	p->hmac_set (octx);
1310	send_vpn_packet (p, si);	1383	send_vpn_packet (p, si);
1311		1384
1312	delete p;	1385	delete p;
1313	}	1386	}
1314		1387
		1388	void
1315	void connection::script_init_env (const char *ext)	1389	connection::script_init_env (const char *ext)
1316	{	1390	{
1317	char *env;	1391	char *env;
1318	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);
1319	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);	1393	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1320	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,	1394	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1321	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,	1395	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1322	conf->id & 0xff); putenv (env);	1396	conf->id & 0xff); putenv (env);
1323	}	1397	}
1324		1398
		1399	void
1325	void connection::script_init_connect_env ()	1400	connection::script_init_connect_env ()
1326	{	1401	{
1327	vpn->script_init_env ();	1402	vpn->script_init_env ();
1328		1403
1329	char *env;	1404	char *env;
1330	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);
1331	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1407	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1332	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1408	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1333	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1409	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1334	}	1410	}
1335		1411
1336	inline const char *	1412	inline const char *
1337	connection::script_node_up ()	1413	connection::script_node_up ()
1338	{	1414	{
…		…
1348		1424
1349	return filename;	1425	return filename;
1350	}	1426	}
1351		1427
1352	inline const char *	1428	inline const char *
		1429	connection::script_node_change ()
		1430	{
		1431	script_init_connect_env ();
		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 *
1353	connection::script_node_down ()	1445	connection::script_node_down ()
1354	{	1446	{
1355	script_init_connect_env ();	1447	script_init_connect_env ();
1356		1448
1357	putenv ((char *)"STATE=down");	1449	putenv ((char *)"STATE=down");
…		…
1368	connection::connection (struct vpn vpn, conf_node conf)	1460	connection::connection (struct vpn vpn, conf_node conf)
1369	: vpn(vpn), conf(conf),	1461	: vpn(vpn), conf(conf),
1370	#if ENABLE_DNS	1462	#if ENABLE_DNS
1371	dns (0),	1463	dns (0),
1372	#endif	1464	#endif
1373	data_queue(conf->max_ttl, conf->max_queue),	1465	data_queue(conf->max_ttl, conf->max_queue + 1),
1374	vpn_queue(conf->max_ttl, conf->max_queue)	1466	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1375	{	1467	{
1376	rekey .set<connection, &connection::rekey_cb > (this);	1468	rekey .set<connection, &connection::rekey_cb > (this);
1377	keepalive .set<connection, &connection::keepalive_cb > (this);	1469	keepalive .set<connection, &connection::keepalive_cb > (this);
1378	establish_connection.set<connection, &connection::establish_connection_cb> (this);	1470	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1379		1471
1380	last_establish_attempt = 0.;	1472	last_establish_attempt = 0.;
1381	octx = ictx = 0;	1473	octx = ictx = 0;
1382		1474
1383	if (!conf->protocols) // make sure some protocol is enabled
1384	conf->protocols = PROT_UDPv4;
1385
1386	connectmode = conf->connectmode;	1475	connectmode = conf->connectmode;
1387		1476
1388	// queue a dummy packet to force an initial connection attempt	1477	// queue a dummy packet to force an initial connection attempt
1389	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)	1478	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
1390	vpn_queue.put (new net_packet);	1479	vpn_queue.put (new net_packet);
…		…
1395	connection::~connection ()	1484	connection::~connection ()
1396	{	1485	{
1397	shutdown ();	1486	shutdown ();
1398	}	1487	}
1399		1488
		1489	void
1400	void connection_init ()	1490	connection_init ()
1401	{	1491	{
1402	auth_rate_limiter.clear ();	1492	auth_rate_limiter.clear ();
1403	reset_rate_limiter.clear ();	1493	reset_rate_limiter.clear ();
1404	}	1494	}
1405		1495

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Comparing gvpe/src/connection.C (file contents): Revision 1.70 by pcg, Thu Aug 7 19:07:02 2008 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 1.70 by pcg, Thu Aug 7 19:07:02 2008 UTC vs.
Revision 1.97 by root, Tue Dec 4 13:23:17 2012 UTC