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

Comparing gvpe/src/connection.C (file contents):
Revision 1.7 by pcg, Sat Apr 5 17:54:22 2003 UTC vs.
Revision 1.48 by pcg, Tue Mar 8 00:32:54 2005 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		4
		5	This file is part of GVPE.
		6
4	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify
5	it under the terms of the GNU General Public License as published by	8	it under the terms of the GNU General Public License as published by
6	the Free Software Foundation; either version 2 of the License, or	9	the Free Software Foundation; either version 2 of the License, or
7	(at your option) any later version.	10	(at your option) any later version.
8		11
9	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,
10	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12	GNU General Public License for more details.	15	GNU General Public License for more details.
13		16
14	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
15	along with this program; if not, write to the Free Software	18	along with gvpe; if not, write to the Free Software
16	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17	*/	20	*/
18		21
19	#include "config.h"	22	#include "config.h"
20		23
21	extern "C" {	24	#include <cassert>
22	# include "lzf/lzf.h"
23	}
24		25
25	#include <list>	26	#include <list>
26		27
27	#include <openssl/rand.h>	28	#include <openssl/rand.h>
28	#include <openssl/evp.h>	29	#include <openssl/evp.h>
35	#include "slog.h"	36	#include "slog.h"
36	#include "device.h"	37	#include "device.h"
37	#include "vpn.h"	38	#include "vpn.h"
38	#include "connection.h"	39	#include "connection.h"
39		40
		41	#include "netcompat.h"
		42
40	#if !HAVE_RAND_PSEUDO_BYTES	43	#if !HAVE_RAND_PSEUDO_BYTES
41	# define RAND_pseudo_bytes RAND_bytes	44	# define RAND_pseudo_bytes RAND_bytes
42	#endif	45	#endif
43		46
44	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	47	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic
45		48
		49	#define ULTRA_FAST 1
		50	#define HLOG 15
		51	#include "lzf/lzf.h"
		52	#include "lzf/lzf_c.c"
		53	#include "lzf/lzf_d.c"
		54
46	struct crypto_ctx	55	struct crypto_ctx
47	{	56	{
48	EVP_CIPHER_CTX cctx;	57	EVP_CIPHER_CTX cctx;
49	HMAC_CTX hctx;	58	HMAC_CTX hctx;
50		59
…		…
53	};	62	};
54		63
55	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	64	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)
56	{	65	{
57	EVP_CIPHER_CTX_init (&cctx);	66	EVP_CIPHER_CTX_init (&cctx);
58	EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc);	67	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));
59	HMAC_CTX_init (&hctx);	68	HMAC_CTX_init (&hctx);
60	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);	69	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
61	}	70	}
62		71
63	crypto_ctx::~crypto_ctx ()	72	crypto_ctx::~crypto_ctx ()
64	{	73	{
65	EVP_CIPHER_CTX_cleanup (&cctx);	74	require (EVP_CIPHER_CTX_cleanup (&cctx));
66	HMAC_CTX_cleanup (&hctx);	75	HMAC_CTX_cleanup (&hctx);
67	}	76	}
68		77
69	static void	78	static void
70	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	79	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)
71	{	80	{
72	EVP_MD_CTX ctx;	81	EVP_MD_CTX ctx;
73		82
74	EVP_MD_CTX_init (&ctx);	83	EVP_MD_CTX_init (&ctx);
75	EVP_DigestInit (&ctx, RSA_HASH);	84	require (EVP_DigestInit (&ctx, RSA_HASH));
76	EVP_DigestUpdate(&ctx, &chg, sizeof chg);	85	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));
77	EVP_DigestUpdate(&ctx, &id, sizeof id);	86	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
78	EVP_DigestFinal (&ctx, (unsigned char *)&h, 0);	87	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
79	EVP_MD_CTX_cleanup (&ctx);	88	EVP_MD_CTX_cleanup (&ctx);
80	}	89	}
81		90
82	struct rsa_entry {	91	struct rsa_entry {
83	tstamp expire;	92	tstamp expire;
…		…
131		140
132	} rsa_cache;	141	} rsa_cache;
133		142
134	void rsa_cache::cleaner_cb (time_watcher &w)	143	void rsa_cache::cleaner_cb (time_watcher &w)
135	{	144	{
136	if (empty ())	145	if (!empty ())
137	w.at = TSTAMP_CANCEL;
138	else
139	{	146	{
140	w.at = NOW + RSA_TTL;	147	w.start (NOW + RSA_TTL);
141		148
142	for (iterator i = begin (); i != end (); )	149	for (iterator i = begin (); i != end (); )
143	if (i->expire <= NOW)	150	if (i->expire <= NOW)
144	i = erase (i);	151	i = erase (i);
145	else	152	else
…		…
147	}	154	}
148	}	155	}
149		156
150	//////////////////////////////////////////////////////////////////////////////	157	//////////////////////////////////////////////////////////////////////////////
151		158
152	void pkt_queue::put (tap_packet *p)	159	void pkt_queue::put (net_packet *p)
153	{	160	{
154	if (queue[i])	161	if (queue[i])
155	{	162	{
156	delete queue[i];	163	delete queue[i];
157	j = (j + 1) % QUEUEDEPTH;	164	j = (j + 1) % QUEUEDEPTH;
…		…
160	queue[i] = p;	167	queue[i] = p;
161		168
162	i = (i + 1) % QUEUEDEPTH;	169	i = (i + 1) % QUEUEDEPTH;
163	}	170	}
164		171
165	tap_packet *pkt_queue::get ()	172	net_packet *pkt_queue::get ()
166	{	173	{
167	tap_packet *p = queue[j];	174	net_packet *p = queue[j];
168		175
169	if (p)	176	if (p)
170	{	177	{
171	queue[j] = 0;	178	queue[j] = 0;
172	j = (j + 1) % QUEUEDEPTH;	179	j = (j + 1) % QUEUEDEPTH;
…		…
197	// only do action once every x seconds per host whole allowing bursts.	204	// only do action once every x seconds per host whole allowing bursts.
198	// this implementation ("splay list" ;) is inefficient,	205	// this implementation ("splay list" ;) is inefficient,
199	// but low on resources.	206	// but low on resources.
200	struct net_rate_limiter : list<net_rateinfo>	207	struct net_rate_limiter : list<net_rateinfo>
201	{	208	{
202	static const double ALPHA = 1. - 1. / 90.; // allow bursts	209	# define NRL_ALPHA (1. - 1. / 600.) // allow bursts
203	static const double CUTOFF = 20.; // one event every CUTOFF seconds	210	# define NRL_CUTOFF 10. // one event every CUTOFF seconds
204	static const double EXPIRE = CUTOFF * 30.; // expire entries after this time	211	# define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time
		212	# define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value
205		213
206	bool can (const sockinfo &si) { return can((u32)si.host); }	214	bool can (const sockinfo &si) { return can((u32)si.host); }
207	bool can (u32 host);	215	bool can (u32 host);
208	};	216	};
209		217
210	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	218	net_rate_limiter auth_rate_limiter, reset_rate_limiter;
211		219
…		…
214	iterator i;	222	iterator i;
215		223
216	for (i = begin (); i != end (); )	224	for (i = begin (); i != end (); )
217	if (i->host == host)	225	if (i->host == host)
218	break;	226	break;
219	else if (i->last < NOW - EXPIRE)	227	else if (i->last < NOW - NRL_EXPIRE)
220	i = erase (i);	228	i = erase (i);
221	else	229	else
222	i++;	230	i++;
223		231
224	if (i == end ())	232	if (i == end ())
225	{	233	{
226	net_rateinfo ri;	234	net_rateinfo ri;
227		235
228	ri.host = host;	236	ri.host = host;
229	ri.pcnt = 1.;	237	ri.pcnt = 1.;
230	ri.diff = CUTOFF * (1. / (1. - ALPHA));	238	ri.diff = NRL_MAXDIF;
231	ri.last = NOW;	239	ri.last = NOW;
232		240
233	push_front (ri);	241	push_front (ri);
234		242
235	return true;	243	return true;
…		…
237	else	245	else
238	{	246	{
239	net_rateinfo ri (*i);	247	net_rateinfo ri (*i);
240	erase (i);	248	erase (i);
241		249
242	ri.pcnt = ri.pcnt * ALPHA;	250	ri.pcnt = ri.pcnt * NRL_ALPHA;
243	ri.diff = ri.diff * ALPHA + (NOW - ri.last);	251	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);
244		252
245	ri.last = NOW;	253	ri.last = NOW;
246		254
		255	double dif = ri.diff / ri.pcnt;
		256
247	bool send = ri.diff / ri.pcnt > CUTOFF;	257	bool send = dif > NRL_CUTOFF;
248		258
		259	if (dif > NRL_MAXDIF)
		260	{
		261	ri.pcnt = 1.;
		262	ri.diff = NRL_MAXDIF;
		263	}
249	if (send)	264	else if (send)
250	ri.pcnt++;	265	ri.pcnt++;
251		266
252	push_front (ri);	267	push_front (ri);
253		268
254	return send;	269	return send;
…		…
299	}	314	}
300		315
301	#define MAXVPNDATA (MAX_MTU - 6 - 6)	316	#define MAXVPNDATA (MAX_MTU - 6 - 6)
302	#define DATAHDR (sizeof (u32) + RAND_SIZE)	317	#define DATAHDR (sizeof (u32) + RAND_SIZE)
303		318
304	struct vpndata_packet:vpn_packet	319	struct vpndata_packet : vpn_packet
305	{	320	{
306	u8 data[MAXVPNDATA + DATAHDR]; // seqno	321	u8 data[MAXVPNDATA + DATAHDR]; // seqno
307		322
308	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);	323	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
309	tap_packet unpack (connection conn, u32 &seqno);	324	tap_packet unpack (connection conn, u32 &seqno);
…		…
322	int outl = 0, outl2;	337	int outl = 0, outl2;
323	ptype type = PT_DATA_UNCOMPRESSED;	338	ptype type = PT_DATA_UNCOMPRESSED;
324		339
325	#if ENABLE_COMPRESSION	340	#if ENABLE_COMPRESSION
326	u8 cdata[MAX_MTU];	341	u8 cdata[MAX_MTU];
327	u32 cl;
328		342
		343	if (conn->features & ENABLE_COMPRESSION)
		344	{
329	cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	345	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
		346
330	if (cl)	347	if (cl)
331	{	348	{
332	type = PT_DATA_COMPRESSED;	349	type = PT_DATA_COMPRESSED;
333	d = cdata;	350	d = cdata;
334	l = cl + 2;	351	l = cl + 2;
335		352
336	d[0] = cl >> 8;	353	d[0] = cl >> 8;
337	d[1] = cl;	354	d[1] = cl;
		355	}
338	}	356	}
339	#endif	357	#endif
340		358
341	EVP_EncryptInit_ex (cctx, 0, 0, 0, 0);	359	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));
342		360
343	struct {	361	struct {
344	#if RAND_SIZE	362	#if RAND_SIZE
345	u8 rnd[RAND_SIZE];	363	u8 rnd[RAND_SIZE];
346	#endif	364	#endif
…		…
350	datahdr.seqno = ntohl (seqno);	368	datahdr.seqno = ntohl (seqno);
351	#if RAND_SIZE	369	#if RAND_SIZE
352	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	370	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);
353	#endif	371	#endif
354		372
355	EVP_EncryptUpdate (cctx,	373	require (EVP_EncryptUpdate (cctx,
356	(unsigned char *) data + outl, &outl2,	374	(unsigned char *) data + outl, &outl2,
357	(unsigned char *) &datahdr, DATAHDR);	375	(unsigned char *) &datahdr, DATAHDR));
358	outl += outl2;	376	outl += outl2;
359		377
360	EVP_EncryptUpdate (cctx,	378	require (EVP_EncryptUpdate (cctx,
361	(unsigned char *) data + outl, &outl2,	379	(unsigned char *) data + outl, &outl2,
362	(unsigned char *) d, l);	380	(unsigned char *) d, l));
363	outl += outl2;	381	outl += outl2;
364		382
365	EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2);	383	require (EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2));
366	outl += outl2;	384	outl += outl2;
367		385
368	len = outl + data_hdr_size ();	386	len = outl + data_hdr_size ();
369		387
370	set_hdr (type, dst);	388	set_hdr (type, dst);
…		…
379	int outl = 0, outl2;	397	int outl = 0, outl2;
380	tap_packet *p = new tap_packet;	398	tap_packet *p = new tap_packet;
381	u8 *d;	399	u8 *d;
382	u32 l = len - data_hdr_size ();	400	u32 l = len - data_hdr_size ();
383		401
384	EVP_DecryptInit_ex (cctx, 0, 0, 0, 0);	402	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));
385		403
386	#if ENABLE_COMPRESSION	404	#if ENABLE_COMPRESSION
387	u8 cdata[MAX_MTU];	405	u8 cdata[MAX_MTU];
388		406
389	if (type == PT_DATA_COMPRESSED)	407	if (type == PT_DATA_COMPRESSED)
…		…
391	else	409	else
392	#endif	410	#endif
393	d = &(*p)[6 + 6 - DATAHDR];	411	d = &(*p)[6 + 6 - DATAHDR];
394		412
395	/* this overwrites part of the src mac, but we fix that later */	413	/* this overwrites part of the src mac, but we fix that later */
396	EVP_DecryptUpdate (cctx,	414	require (EVP_DecryptUpdate (cctx,
397	d, &outl2,	415	d, &outl2,
398	(unsigned char *)&data, len - data_hdr_size ());	416	(unsigned char *)&data, len - data_hdr_size ()));
399	outl += outl2;	417	outl += outl2;
400		418
401	EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2);	419	require (EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2));
402	outl += outl2;	420	outl += outl2;
403		421
404	seqno = ntohl ((u32 )(d + RAND_SIZE));	422	seqno = ntohl ((u32 )(d + RAND_SIZE));
405		423
406	id2mac (dst () ? dst() : THISNODE->id, p->dst);	424	id2mac (dst () ? dst() : THISNODE->id, p->dst);
…		…
435	{	453	{
436	// actually, hmaclen cannot be checked because the hmac	454	// actually, hmaclen cannot be checked because the hmac
437	// field comes before this data, so peers with other	455	// field comes before this data, so peers with other
438	// hmacs simply will not work.	456	// hmacs simply will not work.
439	u8 prot_major, prot_minor, randsize, hmaclen;	457	u8 prot_major, prot_minor, randsize, hmaclen;
440	u8 flags, challengelen, pad2, pad3;	458	u8 flags, challengelen, features, pad3;
441	u32 cipher_nid, digest_nid, hmac_nid;	459	u32 cipher_nid, digest_nid, hmac_nid;
442
443	const u8 curflags () const
444	{
445	return 0x80
446	\| (ENABLE_COMPRESSION ? 0x01 : 0x00);
447	}
448		460
449	void setup (ptype type, int dst);	461	void setup (ptype type, int dst);
450	bool chk_config () const;	462	bool chk_config () const;
		463
		464	static u8 get_features ()
		465	{
		466	u8 f = 0;
		467	#if ENABLE_COMPRESSION
		468	f \|= FEATURE_COMPRESSION;
		469	#endif
		470	#if ENABLE_ROHC
		471	f \|= FEATURE_ROHC;
		472	#endif
		473	return f;
		474	}
451	};	475	};
452		476
453	void config_packet::setup (ptype type, int dst)	477	void config_packet::setup (ptype type, int dst)
454	{	478	{
455	prot_major = PROTOCOL_MAJOR;	479	prot_major = PROTOCOL_MAJOR;
456	prot_minor = PROTOCOL_MINOR;	480	prot_minor = PROTOCOL_MINOR;
457	randsize = RAND_SIZE;	481	randsize = RAND_SIZE;
458	hmaclen = HMACLENGTH;	482	hmaclen = HMACLENGTH;
459	flags = curflags ();	483	flags = 0;
460	challengelen = sizeof (rsachallenge);	484	challengelen = sizeof (rsachallenge);
		485	features = get_features ();
461		486
462	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	487	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));
463	digest_nid = htonl (EVP_MD_type (RSA_HASH));	488	digest_nid = htonl (EVP_MD_type (RSA_HASH));
464	hmac_nid = htonl (EVP_MD_type (DIGEST));	489	hmac_nid = htonl (EVP_MD_type (DIGEST));
465		490
…		…
467	set_hdr (type, dst);	492	set_hdr (type, dst);
468	}	493	}
469		494
470	bool config_packet::chk_config () const	495	bool config_packet::chk_config () const
471	{	496	{
472	return prot_major == PROTOCOL_MAJOR	497	if (prot_major != PROTOCOL_MAJOR)
473	&& randsize == RAND_SIZE	498	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
474	&& hmaclen == HMACLENGTH	499	else if (randsize != RAND_SIZE)
475	&& flags == curflags ()	500	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
		501	else if (hmaclen != HMACLENGTH)
		502	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
476	&& challengelen == sizeof (rsachallenge)	503	else if (challengelen != sizeof (rsachallenge))
		504	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
477	&& cipher_nid == htonl (EVP_CIPHER_nid (CIPHER))	505	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))
		506	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));
478	&& digest_nid == htonl (EVP_MD_type (RSA_HASH))	507	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
		508	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
479	&& hmac_nid == htonl (EVP_MD_type (DIGEST));	509	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))
		510	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));
		511	else
		512	return true;
		513
		514	return false;
480	}	515	}
481		516
482	struct auth_req_packet : config_packet	517	struct auth_req_packet : config_packet
483	{	518	{
484	char magic[8];	519	char magic[8];
485	u8 initiate; // false if this is just an automatic reply	520	u8 initiate; // false if this is just an automatic reply
486	u8 protocols; // supported protocols (will get patches on forward)	521	u8 protocols; // supported protocols (will be patched on forward)
487	u8 pad2, pad3;	522	u8 pad2, pad3;
488	rsaid id;	523	rsaid id;
489	rsaencrdata encr;	524	rsaencrdata encr;
490		525
491	auth_req_packet (int dst, bool initiate_, u8 protocols_)	526	auth_req_packet (int dst, bool initiate_, u8 protocols_)
…		…
546	};	581	};
547		582
548	/////////////////////////////////////////////////////////////////////////////	583	/////////////////////////////////////////////////////////////////////////////
549		584
550	void	585	void
		586	connection::connection_established ()
		587	{
		588	if (ictx && octx)
		589	{
		590	connectmode = conf->connectmode;
		591
		592	// make sure rekeying timeouts are slightly asymmetric
		593	rekey.start (NOW + ::conf.rekey
		594	+ (conf->id > THISNODE->id ? 10 : 0));
		595	keepalive.start (NOW + ::conf.keepalive);
		596
		597	// send queued packets
		598	if (ictx && octx)
		599	{
		600	while (tap_packet p = (tap_packet )data_queue.get ())
		601	{
		602	send_data_packet (p);
		603	delete p;
		604	}
		605
		606	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		607	{
		608	send_vpn_packet (p, si, IPTOS_RELIABILITY);
		609	delete p;
		610	}
		611	}
		612	}
		613	else
		614	{
		615	retry_cnt = 0;
		616	establish_connection.start (NOW + 5);
		617	keepalive.stop ();
		618	rekey.stop ();
		619	}
		620	}
		621
		622	void
551	connection::reset_dstaddr ()	623	connection::reset_si ()
552	{	624	{
553	protocol = best_protocol (THISNODE->protocols & conf->protocols);	625	protocol = best_protocol (THISNODE->protocols & conf->protocols);
554		626
555	// mask out protocols we cannot establish	627	// mask out protocols we cannot establish
556	if (!conf->udp_port) protocol &= ~PROT_UDPv4;	628	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
557	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;	629	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
		630	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
558		631
559	si.set (conf, protocol);	632	si.set (conf, protocol);
560	}	633	}
561		634
		635	// ensure sockinfo is valid, forward if necessary
		636	const sockinfo &
		637	connection::forward_si (const sockinfo &si) const
		638	{
		639	if (!si.valid ())
		640	{
		641	connection *r = vpn->find_router ();
		642
		643	if (r)
		644	{
		645	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),
		646	conf->nodename, r->conf->nodename, (const char *)r->si);
		647	return r->si;
		648	}
		649	else
		650	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),
		651	conf->nodename);
		652	}
		653
		654	return si;
		655	}
		656
		657	void
		658	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		659	{
		660	if (!vpn->send_vpn_packet (pkt, si, tos))
		661	reset_connection ();
		662	}
		663
562	void	664	void
563	connection::send_ping (const sockinfo &si, u8 pong)	665	connection::send_ping (const sockinfo &si, u8 pong)
564	{	666	{
565	ping_packet *pkt = new ping_packet;	667	ping_packet *pkt = new ping_packet;
566		668
567	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	669	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
568	vpn->send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	670	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
569		671
570	delete pkt;	672	delete pkt;
571	}	673	}
572		674
573	void	675	void
…		…
576	if (reset_rate_limiter.can (si) && connectmode != conf_node::C_DISABLED)	678	if (reset_rate_limiter.can (si) && connectmode != conf_node::C_DISABLED)
577	{	679	{
578	config_packet *pkt = new config_packet;	680	config_packet *pkt = new config_packet;
579		681
580	pkt->setup (vpn_packet::PT_RESET, conf->id);	682	pkt->setup (vpn_packet::PT_RESET, conf->id);
581	vpn->send_vpn_packet (pkt, si, IPTOS_MINCOST);	683	send_vpn_packet (pkt, si, IPTOS_MINCOST);
582		684
583	delete pkt;	685	delete pkt;
584	}	686	}
585	}	687	}
586		688
…		…
588	connection::send_auth_request (const sockinfo &si, bool initiate)	690	connection::send_auth_request (const sockinfo &si, bool initiate)
589	{	691	{
590	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	692	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
591		693
592	rsachallenge chg;	694	rsachallenge chg;
593
594	rsa_cache.gen (pkt->id, chg);	695	rsa_cache.gen (pkt->id, chg);
595		696	rsa_encrypt (conf->rsa_key, chg, pkt->encr);
596	if (0 > RSA_public_encrypt (sizeof chg,
597	(unsigned char )&chg, (unsigned char )&pkt->encr,
598	conf->rsa_key, RSA_PKCS1_OAEP_PADDING))
599	fatal ("RSA_public_encrypt error");
600		697
601	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	698	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);
602		699
603	vpn->send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	700	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
604		701
605	delete pkt;	702	delete pkt;
606	}	703	}
607		704
608	void	705	void
…		…
616		713
617	pkt->hmac_set (octx);	714	pkt->hmac_set (octx);
618		715
619	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	716	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);
620		717
621	vpn->send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	718	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
622		719
623	delete pkt;	720	delete pkt;
624	}	721	}
625		722
626	void	723	void
…		…
630	conf->id, rid, (const char *)rsi);	727	conf->id, rid, (const char *)rsi);
631		728
632	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	729	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
633		730
634	r->hmac_set (octx);	731	r->hmac_set (octx);
635	vpn->send_vpn_packet (r, si);	732	send_vpn_packet (r, si);
636		733
637	delete r;	734	delete r;
638	}	735	}
639		736
640	void	737	void
641	connection::establish_connection_cb (time_watcher &w)	738	connection::establish_connection_cb (time_watcher &w)
642	{	739	{
643	if (ictx \|\| conf == THISNODE	740	if (!ictx
		741	&& conf != THISNODE
644	\|\| connectmode == conf_node::C_NEVER	742	&& connectmode != conf_node::C_NEVER
645	\|\| connectmode == conf_node::C_DISABLED)	743	&& connectmode != conf_node::C_DISABLED
646	w.at = TSTAMP_CANCEL;	744	&& NOW > w.at)
647	else if (w.at <= NOW)
648	{	745	{
649	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	746	w.at = TSTAMP_MAX; // first disable this watcher in case of recursion
650		747
651	if (retry_int < 3600 * 8)	748	double retry_int = double (retry_cnt & 3
		749	? (retry_cnt & 3) + 1
		750	: 1 << (retry_cnt >> 2));
		751
		752	reset_si ();
		753
		754	bool slow = si.prot & PROT_SLOW;
		755
		756	if (si.prot && !si.host)
		757	vpn->send_connect_request (conf->id);
		758	else
		759	{
		760	const sockinfo &dsi = forward_si (si);
		761
		762	slow = slow \|\| (dsi.prot & PROT_SLOW);
		763
		764	if (dsi.valid () && auth_rate_limiter.can (dsi))
		765	{
		766	if (retry_cnt < 4)
		767	send_auth_request (dsi, true);
		768	else
		769	send_ping (dsi, 0);
		770	}
		771	}
		772
		773	retry_int *= slow ? 3. : 0.7;
		774
		775	if (retry_int < conf->max_retry)
652	retry_cnt++;	776	retry_cnt++;
653
654	w.at = NOW + retry_int;
655
656	if (conf->hostname)
657	{
658	reset_dstaddr ();
659
660	if (si.valid () && auth_rate_limiter.can (si))
661	{
662	if (retry_cnt < 4)
663	send_auth_request (si, true);
664	else
665	send_ping (si, 0);
666	}
667	}
668	else	777	else
669	vpn->connect_request (conf->id);	778	retry_int = conf->max_retry;
		779
		780	w.start (NOW + retry_int);
670	}	781	}
671	}	782	}
672		783
673	void	784	void
674	connection::reset_connection ()	785	connection::reset_connection ()
…		…
682	run_script (run_script_cb (this, &connection::script_node_down), false);	793	run_script (run_script_cb (this, &connection::script_node_down), false);
683	}	794	}
684		795
685	delete ictx; ictx = 0;	796	delete ictx; ictx = 0;
686	delete octx; octx = 0;	797	delete octx; octx = 0;
		798	#if ENABLE_DNS
		799	dnsv4_reset_connection ();
		800	#endif
687		801
688	si.host= 0;	802	si.host = 0;
689		803
690	last_activity = 0;	804	last_activity = 0;
691	retry_cnt = 0;	805	retry_cnt = 0;
692		806
693	rekey.reset ();	807	rekey.stop ();
694	keepalive.reset ();	808	keepalive.stop ();
695	establish_connection.reset ();	809	establish_connection.stop ();
696	}	810	}
697		811
698	void	812	void
699	connection::shutdown ()	813	connection::shutdown ()
700	{	814	{
…		…
705	}	819	}
706		820
707	void	821	void
708	connection::rekey_cb (time_watcher &w)	822	connection::rekey_cb (time_watcher &w)
709	{	823	{
710	w.at = TSTAMP_CANCEL;
711
712	reset_connection ();	824	reset_connection ();
713	establish_connection ();	825	establish_connection ();
714	}	826	}
715		827
716	void	828	void
717	connection::send_data_packet (tap_packet *pkt, bool broadcast)	829	connection::send_data_packet (tap_packet *pkt)
718	{	830	{
719	vpndata_packet *p = new vpndata_packet;	831	vpndata_packet *p = new vpndata_packet;
720	int tos = 0;	832	int tos = 0;
721		833
722	if (conf->inherit_tos	834	// I am not hilarious about peeking into packets, but so be it.
723	&& (pkt)[12] == 0x08 && (pkt)[13] == 0x00 // IP	835	if (conf->inherit_tos && pkt->is_ipv4 ())
724	&& ((*pkt)[14] & 0xf0) == 0x40) // IPv4
725	tos = (*pkt)[15] & IPTOS_TOS_MASK;	836	tos = (*pkt)[15] & IPTOS_TOS_MASK;
726		837
727	p->setup (this, broadcast ? 0 : conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs	838	p->setup (this, conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs
728	vpn->send_vpn_packet (p, si, tos);	839	send_vpn_packet (p, si, tos);
729		840
730	delete p;	841	delete p;
731		842
732	if (oseqno > MAX_SEQNO)	843	if (oseqno > MAX_SEQNO)
733	rekey ();	844	rekey ();
734	}	845	}
735		846
736	void	847	void
737	connection::inject_data_packet (tap_packet *pkt, bool broadcast)	848	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)
738	{	849	{
739	if (ictx && octx)	850	if (ictx && octx)
740	send_data_packet (pkt, broadcast);	851	send_data_packet (pkt);
741	else	852	else
742	{	853	{
743	if (!broadcast)//DDDD	854	if (!broadcast)//DDDD
744	queue.put (new tap_packet (*pkt));	855	data_queue.put (new tap_packet (*pkt));
		856
		857	establish_connection ();
		858	}
		859	}
		860
		861	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)
		862	{
		863	if (ictx && octx)
		864	send_vpn_packet (pkt, si, tos);
		865	else
		866	{
		867	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
745		868
746	establish_connection ();	869	establish_connection ();
747	}	870	}
748	}	871	}
749		872
…		…
808	if (p->initiate)	931	if (p->initiate)
809	send_auth_request (rsi, false);	932	send_auth_request (rsi, false);
810		933
811	rsachallenge k;	934	rsachallenge k;
812		935
813	if (0 > RSA_private_decrypt (sizeof (p->encr),	936	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))
814	(unsigned char )&p->encr, (unsigned char )&k,	937	{
815	::conf.rsa_key, RSA_PKCS1_OAEP_PADDING))
816	slog (L_ERR, _("%s(%s): challenge illegal or corrupted"),	938	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
817	conf->nodename, (const char *)rsi);	939	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
		940	break;
		941	}
818	else	942	else
819	{	943	{
820	retry_cnt = 0;
821	establish_connection.start (NOW + 8); //? ;)
822	keepalive.reset ();
823	rekey.reset ();
824
825	delete ictx;
826	ictx = 0;
827
828	delete octx;	944	delete octx;
829		945
830	octx = new crypto_ctx (k, 1);	946	octx = new crypto_ctx (k, 1);
831	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	947	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;
832		948
833	conf->protocols = p->protocols;	949	conf->protocols = p->protocols;
		950	features = p->features & config_packet::get_features ();
		951
834	send_auth_response (rsi, p->id, k);	952	send_auth_response (rsi, p->id, k);
		953
		954	connection_established ();
835		955
836	break;	956	break;
837	}	957	}
838	}	958	}
		959	else
		960	slog (L_WARN, _("%s(%s): protocol mismatch"),
		961	conf->nodename, (const char *)rsi);
839		962
840	send_reset (rsi);	963	send_reset (rsi);
841	}	964	}
842		965
843	break;	966	break;
…		…
856	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	979	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
857		980
858	rsachallenge chg;	981	rsachallenge chg;
859		982
860	if (!rsa_cache.find (p->id, chg))	983	if (!rsa_cache.find (p->id, chg))
		984	{
861	slog (L_ERR, _("%s(%s): unrequested auth response"),	985	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),
862	conf->nodename, (const char *)rsi);	986	conf->nodename, (const char *)rsi);
		987	break;
		988	}
863	else	989	else
864	{	990	{
865	crypto_ctx *cctx = new crypto_ctx (chg, 0);	991	crypto_ctx *cctx = new crypto_ctx (chg, 0);
866		992
867	if (!p->hmac_chk (cctx))	993	if (!p->hmac_chk (cctx))
		994	{
868	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"	995	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
869	"could be an attack, or just corruption or an synchronization error"),	996	"could be an attack, or just corruption or a synchronization error"),
870	conf->nodename, (const char *)rsi);	997	conf->nodename, (const char *)rsi);
		998	break;
		999	}
871	else	1000	else
872	{	1001	{
873	rsaresponse h;	1002	rsaresponse h;
874		1003
875	rsa_hash (p->id, chg, h);	1004	rsa_hash (p->id, chg, h);
…		…
883	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid	1012	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
884		1013
885	si = rsi;	1014	si = rsi;
886	protocol = rsi.prot;	1015	protocol = rsi.prot;
887		1016
888	rekey.start (NOW + ::conf.rekey);	1017	connection_established ();
889	keepalive.start (NOW + ::conf.keepalive);
890
891	// send queued packets
892	while (tap_packet *p = queue.get ())
893	{
894	send_data_packet (p);
895	delete p;
896	}
897
898	connectmode = conf->connectmode;
899		1018
900	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),	1019	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
901	conf->nodename, (const char *)rsi,	1020	conf->nodename, (const char *)rsi,
902	p->prot_major, p->prot_minor);	1021	p->prot_major, p->prot_minor);
903		1022
…		…
929		1048
930	if (ictx && octx)	1049	if (ictx && octx)
931	{	1050	{
932	vpndata_packet p = (vpndata_packet )pkt;	1051	vpndata_packet p = (vpndata_packet )pkt;
933		1052
934	if (rsi == si)	1053	if (!p->hmac_chk (ictx))
		1054	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
		1055	"could be an attack, or just corruption or a synchronization error"),
		1056	conf->nodename, (const char *)rsi);
		1057	else
935	{	1058	{
936	if (!p->hmac_chk (ictx))
937	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
938	"could be an attack, or just corruption or an synchronization error"),
939	conf->nodename, (const char *)rsi);
940	else	1059	u32 seqno;
		1060	tap_packet *d = p->unpack (this, seqno);
		1061
		1062	if (iseqno.recv_ok (seqno))
941	{	1063	{
942	u32 seqno;	1064	vpn->tap->send (d);
943	tap_packet *d = p->unpack (this, seqno);
944		1065
945	if (iseqno.recv_ok (seqno))	1066	if (si != rsi)
946	{	1067	{
947	vpn->tap->send (d);	1068	// fast re-sync on connection changes, useful especially for tcp/ip
948
949	if (p->dst () == 0) // re-broadcast
950	for (vpn::conns_vector::iterator i = vpn->conns.begin (); i != vpn->conns.end (); ++i)
951	{
952	connection c = i;
953
954	if (c->conf != THISNODE && c->conf != conf)
955	c->inject_data_packet (d);
956	}
957
958	delete d;
959
960	break;	1069	si = rsi;
		1070
		1071	slog (L_INFO, _("%s(%s): socket address changed to %s"),
		1072	conf->nodename, (const char )si, (const char )rsi);
961	}	1073	}
962	}	1074	}
		1075
		1076	delete d;
		1077	break;
963	}	1078	}
964	else
965	slog (L_ERR, _("received data packet from unknown source %s"), (const char *)rsi);
966	}	1079	}
967		1080
968	send_reset (rsi);	1081	send_reset (rsi);
969	break;	1082	break;
970		1083
…		…
985	// send connect_info packets to both sides, in case one is	1098	// send connect_info packets to both sides, in case one is
986	// behind a nat firewall (or both ;)	1099	// behind a nat firewall (or both ;)
987	c->send_connect_info (conf->id, si, conf->protocols);	1100	c->send_connect_info (conf->id, si, conf->protocols);
988	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1101	send_connect_info (c->conf->id, c->si, c->conf->protocols);
989	}	1102	}
		1103	else
		1104	c->establish_connection ();
990	}	1105	}
991		1106
992	break;	1107	break;
993		1108
994	case vpn_packet::PT_CONNECT_INFO:	1109	case vpn_packet::PT_CONNECT_INFO:
995	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1110	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
996	{	1111	{
997	connect_info_packet p = (connect_info_packet ) pkt;	1112	connect_info_packet p = (connect_info_packet )pkt;
998		1113
999	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1114	if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything
1000		1115	{
1001	connection *c = vpn->conns[p->id - 1];	1116	connection *c = vpn->conns[p->id - 1];
1002		1117
1003	c->conf->protocols = p->protocols;	1118	c->conf->protocols = p->protocols;
1004	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1119	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1005	p->si.upgrade_protocol (protocol, c->conf);	1120	p->si.upgrade_protocol (protocol, c->conf);
1006		1121
1007	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1122	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",
1008	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1123	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);
1009	//slog (L_ERR, "%d PROTOCL(C%x,T%x,0S%x,S%x,P%x,SP%x)",
1010	// p->id, c->conf->protocols, THISNODE->protocols, p->si.supported_protocols(0), p->si.supported_protocols (c->conf),
1011	// protocol, p->si.prot);
1012		1124
		1125	const sockinfo &dsi = forward_si (p->si);
		1126
		1127	if (dsi.valid ())
1013	c->send_auth_request (p->si, true);	1128	c->send_auth_request (dsi, true);
		1129	}
1014	}	1130	}
1015		1131
1016	break;	1132	break;
1017		1133
1018	default:	1134	default:
…		…
1027	{	1143	{
1028	reset_connection ();	1144	reset_connection ();
1029	establish_connection ();	1145	establish_connection ();
1030	}	1146	}
1031	else if (NOW < last_activity + ::conf.keepalive)	1147	else if (NOW < last_activity + ::conf.keepalive)
1032	w.at = last_activity + ::conf.keepalive;	1148	w.start (last_activity + ::conf.keepalive);
1033	else if (conf->connectmode != conf_node::C_ONDEMAND	1149	else if (conf->connectmode != conf_node::C_ONDEMAND
1034	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1150	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1035	{	1151	{
1036	send_ping (si);	1152	send_ping (si);
1037	w.at = NOW + 5;	1153	w.start (NOW + 5);
1038	}	1154	}
		1155	else if (NOW < last_activity + ::conf.keepalive + 10)
		1156	// hold ondemand connections implicitly a few seconds longer
		1157	// should delete octx, though, or something like that ;)
		1158	w.start (last_activity + ::conf.keepalive + 10);
1039	else	1159	else
1040	reset_connection ();	1160	reset_connection ();
1041	}	1161	}
1042		1162
1043	void connection::connect_request (int id)	1163	void connection::send_connect_request (int id)
1044	{	1164	{
1045	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1165	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);
1046		1166
1047	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1167	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);
1048	p->hmac_set (octx);	1168	p->hmac_set (octx);
1049	vpn->send_vpn_packet (p, si);	1169	send_vpn_packet (p, si);
1050		1170
1051	delete p;	1171	delete p;
1052	}	1172	}
1053		1173
1054	void connection::script_node ()	1174	void connection::script_node ()
…		…
1078	putenv ("STATE=down");	1198	putenv ("STATE=down");
1079		1199
1080	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1200	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";
1081	}	1201	}
1082		1202
1083	connection::connection(struct vpn *vpn_)	1203	connection::connection (struct vpn vpn, conf_node conf)
1084	: vpn(vpn_)	1204	: vpn(vpn), conf(conf)
1085	, rekey (this, &connection::rekey_cb)	1205	, rekey (this, &connection::rekey_cb)
1086	, keepalive (this, &connection::keepalive_cb)	1206	, keepalive (this, &connection::keepalive_cb)
1087	, establish_connection (this, &connection::establish_connection_cb)	1207	, establish_connection (this, &connection::establish_connection_cb)
		1208	#if ENABLE_DNS
		1209	, dns (0)
		1210	#endif
1088	{	1211	{
1089	octx = ictx = 0;	1212	octx = ictx = 0;
1090	retry_cnt = 0;	1213	retry_cnt = 0;
1091		1214
		1215	if (!conf->protocols) // make sure some protocol is enabled
		1216	conf->protocols = PROT_UDPv4;
		1217
1092	connectmode = conf_node::C_ALWAYS; // initial setting	1218	connectmode = conf_node::C_ALWAYS; // initial setting
1093	reset_connection ();	1219	reset_connection ();
1094	}	1220	}
1095		1221
1096	connection::~connection ()	1222	connection::~connection ()

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Comparing gvpe/src/connection.C (file contents): Revision 1.7 by pcg, Sat Apr 5 17:54:22 2003 UTC vs. Revision 1.48 by pcg, Tue Mar 8 00:32:54 2005 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.7 by pcg, Sat Apr 5 17:54:22 2003 UTC vs.
Revision 1.48 by pcg, Tue Mar 8 00:32:54 2005 UTC