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

Comparing gvpe/src/connection.C (file contents):
Revision 1.1 by pcg, Wed Apr 2 03:06:22 2003 UTC vs.
Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 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		4
4	This program is free software; you can redistribute it and/or modify	5	This program is free software; you can redistribute it and/or modify
5	it under the terms of the GNU General Public License as published by	6	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	7	the Free Software Foundation; either version 2 of the License, or
7	(at your option) any later version.	8	(at your option) any later version.
16	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	17	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17	*/	18	*/
18		19
19	#include "config.h"	20	#include "config.h"
20		21
21	extern "C" {	22	#include <cassert>
22	# include "lzf/lzf.h"
23	}
24		23
25	#include <list>	24	#include <list>
		25
		26	#include <openssl/rand.h>
		27	#include <openssl/evp.h>
		28	#include <openssl/rsa.h>
		29	#include <openssl/err.h>
26		30
27	#include "gettext.h"	31	#include "gettext.h"
28		32
29	#include "conf.h"	33	#include "conf.h"
30	#include "slog.h"	34	#include "slog.h"
31	#include "device.h"	35	#include "device.h"
32	#include "protocol.h"	36	#include "vpn.h"
33	#include "connection.h"	37	#include "connection.h"
		38
		39	#include "netcompat.h"
34		40
35	#if !HAVE_RAND_PSEUDO_BYTES	41	#if !HAVE_RAND_PSEUDO_BYTES
36	# define RAND_pseudo_bytes RAND_bytes	42	# define RAND_pseudo_bytes RAND_bytes
37	#endif	43	#endif
38		44
39	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	45	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic
40		46
		47	#define ULTRA_FAST 1
		48	#define HLOG 15
		49	#include "lzf/lzf.h"
		50	#include "lzf/lzf_c.c"
		51	#include "lzf/lzf_d.c"
		52
41	struct crypto_ctx	53	struct crypto_ctx
42	{	54	{
43	EVP_CIPHER_CTX cctx;	55	EVP_CIPHER_CTX cctx;
44	HMAC_CTX hctx;	56	HMAC_CTX hctx;
45		57
…		…
48	};	60	};
49		61
50	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	62	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)
51	{	63	{
52	EVP_CIPHER_CTX_init (&cctx);	64	EVP_CIPHER_CTX_init (&cctx);
53	EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc);	65	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));
54	HMAC_CTX_init (&hctx);	66	HMAC_CTX_init (&hctx);
55	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);	67	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
56	}	68	}
57		69
58	crypto_ctx::~crypto_ctx ()	70	crypto_ctx::~crypto_ctx ()
59	{	71	{
60	EVP_CIPHER_CTX_cleanup (&cctx);	72	require (EVP_CIPHER_CTX_cleanup (&cctx));
61	HMAC_CTX_cleanup (&hctx);	73	HMAC_CTX_cleanup (&hctx);
62	}	74	}
63		75
64	static void	76	static void
65	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	77	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)
66	{	78	{
67	EVP_MD_CTX ctx;	79	EVP_MD_CTX ctx;
68		80
69	EVP_MD_CTX_init (&ctx);	81	EVP_MD_CTX_init (&ctx);
70	EVP_DigestInit (&ctx, RSA_HASH);	82	require (EVP_DigestInit (&ctx, RSA_HASH));
71	EVP_DigestUpdate(&ctx, &chg, sizeof chg);	83	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));
72	EVP_DigestUpdate(&ctx, &id, sizeof id);	84	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
73	EVP_DigestFinal (&ctx, (unsigned char *)&h, 0);	85	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
74	EVP_MD_CTX_cleanup (&ctx);	86	EVP_MD_CTX_cleanup (&ctx);
75	}	87	}
76		88
77	struct rsa_entry {	89	struct rsa_entry {
78	tstamp expire;	90	tstamp expire;
…		…
80	rsachallenge chg;	92	rsachallenge chg;
81	};	93	};
82		94
83	struct rsa_cache : list<rsa_entry>	95	struct rsa_cache : list<rsa_entry>
84	{	96	{
85	void cleaner_cb (tstamp &ts); time_watcher cleaner;	97	void cleaner_cb (time_watcher &w); time_watcher cleaner;
86		98
87	bool find (const rsaid &id, rsachallenge &chg)	99	bool find (const rsaid &id, rsachallenge &chg)
88	{	100	{
89	for (iterator i = begin (); i != end (); ++i)	101	for (iterator i = begin (); i != end (); ++i)
90	{	102	{
…		…
124	: cleaner (this, &rsa_cache::cleaner_cb)	136	: cleaner (this, &rsa_cache::cleaner_cb)
125	{ }	137	{ }
126		138
127	} rsa_cache;	139	} rsa_cache;
128		140
129	void rsa_cache::cleaner_cb (tstamp &ts)	141	void rsa_cache::cleaner_cb (time_watcher &w)
130	{	142	{
131	if (empty ())	143	if (!empty ())
132	ts = TSTAMP_CANCEL;
133	else
134	{	144	{
135	ts = NOW + RSA_TTL;	145	w.start (NOW + RSA_TTL);
136		146
137	for (iterator i = begin (); i != end (); )	147	for (iterator i = begin (); i != end (); )
138	if (i->expire <= NOW)	148	if (i->expire <= NOW)
139	i = erase (i);	149	i = erase (i);
140	else	150	else
…		…
142	}	152	}
143	}	153	}
144		154
145	//////////////////////////////////////////////////////////////////////////////	155	//////////////////////////////////////////////////////////////////////////////
146		156
147	void pkt_queue::put (tap_packet *p)	157	void pkt_queue::put (net_packet *p)
148	{	158	{
149	if (queue[i])	159	if (queue[i])
150	{	160	{
151	delete queue[i];	161	delete queue[i];
152	j = (j + 1) % QUEUEDEPTH;	162	j = (j + 1) % QUEUEDEPTH;
…		…
155	queue[i] = p;	165	queue[i] = p;
156		166
157	i = (i + 1) % QUEUEDEPTH;	167	i = (i + 1) % QUEUEDEPTH;
158	}	168	}
159		169
160	tap_packet *pkt_queue::get ()	170	net_packet *pkt_queue::get ()
161	{	171	{
162	tap_packet *p = queue[j];	172	net_packet *p = queue[j];
163		173
164	if (p)	174	if (p)
165	{	175	{
166	queue[j] = 0;	176	queue[j] = 0;
167	j = (j + 1) % QUEUEDEPTH;	177	j = (j + 1) % QUEUEDEPTH;
…		…
192	// only do action once every x seconds per host whole allowing bursts.	202	// only do action once every x seconds per host whole allowing bursts.
193	// this implementation ("splay list" ;) is inefficient,	203	// this implementation ("splay list" ;) is inefficient,
194	// but low on resources.	204	// but low on resources.
195	struct net_rate_limiter : list<net_rateinfo>	205	struct net_rate_limiter : list<net_rateinfo>
196	{	206	{
197	static const double ALPHA = 1. - 1. / 90.; // allow bursts	207	static const double ALPHA = 1. - 1. / 600.; // allow bursts
198	static const double CUTOFF = 20.; // one event every CUTOFF seconds	208	static const double CUTOFF = 10.; // one event every CUTOFF seconds
199	static const double EXPIRE = CUTOFF * 30.; // expire entries after this time	209	static const double EXPIRE = CUTOFF * 30.; // expire entries after this time
		210	static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value
200		211
201	bool can (const sockinfo &si) { return can((u32)si.host); }	212	bool can (const sockinfo &si) { return can((u32)si.host); }
202	bool can (u32 host);	213	bool can (u32 host);
203	};	214	};
204		215
205	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	216	net_rate_limiter auth_rate_limiter, reset_rate_limiter;
206		217
…		…
220	{	231	{
221	net_rateinfo ri;	232	net_rateinfo ri;
222		233
223	ri.host = host;	234	ri.host = host;
224	ri.pcnt = 1.;	235	ri.pcnt = 1.;
225	ri.diff = CUTOFF * (1. / (1. - ALPHA));	236	ri.diff = MAXDIF;
226	ri.last = NOW;	237	ri.last = NOW;
227		238
228	push_front (ri);	239	push_front (ri);
229		240
230	return true;	241	return true;
…		…
237	ri.pcnt = ri.pcnt * ALPHA;	248	ri.pcnt = ri.pcnt * ALPHA;
238	ri.diff = ri.diff * ALPHA + (NOW - ri.last);	249	ri.diff = ri.diff * ALPHA + (NOW - ri.last);
239		250
240	ri.last = NOW;	251	ri.last = NOW;
241		252
		253	double dif = ri.diff / ri.pcnt;
		254
242	bool send = ri.diff / ri.pcnt > CUTOFF;	255	bool send = dif > CUTOFF;
243		256
		257	if (dif > MAXDIF)
		258	{
		259	ri.pcnt = 1.;
		260	ri.diff = MAXDIF;
		261	}
244	if (send)	262	else if (send)
245	ri.pcnt++;	263	ri.pcnt++;
246		264
247	push_front (ri);	265	push_front (ri);
248		266
249	return send;	267	return send;
…		…
280	hmac_gen (ctx);	298	hmac_gen (ctx);
281		299
282	return !memcmp (hmac, hmac_digest, HMACLENGTH);	300	return !memcmp (hmac, hmac_digest, HMACLENGTH);
283	}	301	}
284		302
285	void vpn_packet::set_hdr (ptype type, unsigned int dst)	303	void vpn_packet::set_hdr (ptype type_, unsigned int dst)
286	{	304	{
287	this->type = type;	305	type = type_;
288		306
289	int src = THISNODE->id;	307	int src = THISNODE->id;
290		308
291	src1 = src;	309	src1 = src;
292	srcdst = ((src >> 8) << 4) \| (dst >> 8);	310	srcdst = ((src >> 8) << 4) \| (dst >> 8);
…		…
294	}	312	}
295		313
296	#define MAXVPNDATA (MAX_MTU - 6 - 6)	314	#define MAXVPNDATA (MAX_MTU - 6 - 6)
297	#define DATAHDR (sizeof (u32) + RAND_SIZE)	315	#define DATAHDR (sizeof (u32) + RAND_SIZE)
298		316
299	struct vpndata_packet:vpn_packet	317	struct vpndata_packet : vpn_packet
300	{	318	{
301	u8 data[MAXVPNDATA + DATAHDR]; // seqno	319	u8 data[MAXVPNDATA + DATAHDR]; // seqno
302		320
303	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);	321	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
304	tap_packet unpack (connection conn, u32 &seqno);	322	tap_packet unpack (connection conn, u32 &seqno);
…		…
317	int outl = 0, outl2;	335	int outl = 0, outl2;
318	ptype type = PT_DATA_UNCOMPRESSED;	336	ptype type = PT_DATA_UNCOMPRESSED;
319		337
320	#if ENABLE_COMPRESSION	338	#if ENABLE_COMPRESSION
321	u8 cdata[MAX_MTU];	339	u8 cdata[MAX_MTU];
322	u32 cl;
323		340
		341	if (conn->features & ENABLE_COMPRESSION)
		342	{
324	cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	343	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
		344
325	if (cl)	345	if (cl)
326	{	346	{
327	type = PT_DATA_COMPRESSED;	347	type = PT_DATA_COMPRESSED;
328	d = cdata;	348	d = cdata;
329	l = cl + 2;	349	l = cl + 2;
330		350
331	d[0] = cl >> 8;	351	d[0] = cl >> 8;
332	d[1] = cl;	352	d[1] = cl;
		353	}
333	}	354	}
334	#endif	355	#endif
335		356
336	EVP_EncryptInit_ex (cctx, 0, 0, 0, 0);	357	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));
337		358
338	struct {	359	struct {
339	#if RAND_SIZE	360	#if RAND_SIZE
340	u8 rnd[RAND_SIZE];	361	u8 rnd[RAND_SIZE];
341	#endif	362	#endif
…		…
345	datahdr.seqno = ntohl (seqno);	366	datahdr.seqno = ntohl (seqno);
346	#if RAND_SIZE	367	#if RAND_SIZE
347	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	368	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);
348	#endif	369	#endif
349		370
350	EVP_EncryptUpdate (cctx,	371	require (EVP_EncryptUpdate (cctx,
351	(unsigned char *) data + outl, &outl2,	372	(unsigned char *) data + outl, &outl2,
352	(unsigned char *) &datahdr, DATAHDR);	373	(unsigned char *) &datahdr, DATAHDR));
353	outl += outl2;	374	outl += outl2;
354		375
355	EVP_EncryptUpdate (cctx,	376	require (EVP_EncryptUpdate (cctx,
356	(unsigned char *) data + outl, &outl2,	377	(unsigned char *) data + outl, &outl2,
357	(unsigned char *) d, l);	378	(unsigned char *) d, l));
358	outl += outl2;	379	outl += outl2;
359		380
360	EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2);	381	require (EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2));
361	outl += outl2;	382	outl += outl2;
362		383
363	len = outl + data_hdr_size ();	384	len = outl + data_hdr_size ();
364		385
365	set_hdr (type, dst);	386	set_hdr (type, dst);
…		…
374	int outl = 0, outl2;	395	int outl = 0, outl2;
375	tap_packet *p = new tap_packet;	396	tap_packet *p = new tap_packet;
376	u8 *d;	397	u8 *d;
377	u32 l = len - data_hdr_size ();	398	u32 l = len - data_hdr_size ();
378		399
379	EVP_DecryptInit_ex (cctx, 0, 0, 0, 0);	400	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));
380		401
381	#if ENABLE_COMPRESSION	402	#if ENABLE_COMPRESSION
382	u8 cdata[MAX_MTU];	403	u8 cdata[MAX_MTU];
383		404
384	if (type == PT_DATA_COMPRESSED)	405	if (type == PT_DATA_COMPRESSED)
…		…
386	else	407	else
387	#endif	408	#endif
388	d = &(*p)[6 + 6 - DATAHDR];	409	d = &(*p)[6 + 6 - DATAHDR];
389		410
390	/* this overwrites part of the src mac, but we fix that later */	411	/* this overwrites part of the src mac, but we fix that later */
391	EVP_DecryptUpdate (cctx,	412	require (EVP_DecryptUpdate (cctx,
392	d, &outl2,	413	d, &outl2,
393	(unsigned char *)&data, len - data_hdr_size ());	414	(unsigned char *)&data, len - data_hdr_size ()));
394	outl += outl2;	415	outl += outl2;
395		416
396	EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2);	417	require (EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2));
397	outl += outl2;	418	outl += outl2;
398		419
399	seqno = ntohl ((u32 )(d + RAND_SIZE));	420	seqno = ntohl ((u32 )(d + RAND_SIZE));
400		421
401	id2mac (dst () ? dst() : THISNODE->id, p->dst);	422	id2mac (dst () ? dst() : THISNODE->id, p->dst);
…		…
430	{	451	{
431	// actually, hmaclen cannot be checked because the hmac	452	// actually, hmaclen cannot be checked because the hmac
432	// field comes before this data, so peers with other	453	// field comes before this data, so peers with other
433	// hmacs simply will not work.	454	// hmacs simply will not work.
434	u8 prot_major, prot_minor, randsize, hmaclen;	455	u8 prot_major, prot_minor, randsize, hmaclen;
435	u8 flags, challengelen, pad2, pad3;	456	u8 flags, challengelen, features, pad3;
436	u32 cipher_nid, digest_nid, hmac_nid;	457	u32 cipher_nid, digest_nid, hmac_nid;
437
438	const u8 curflags () const
439	{
440	return 0x80
441	\| (ENABLE_COMPRESSION ? 0x01 : 0x00);
442	}
443		458
444	void setup (ptype type, int dst);	459	void setup (ptype type, int dst);
445	bool chk_config () const;	460	bool chk_config () const;
446	};	461	};
		462
		463	#define FEATURES ((ENABLE_COMPRESSION ? FEATURE_COMPRESSION : 0) \
		464	\| (ENABLE_ROHC ? FEATURE_ROHC : 0))
447		465
448	void config_packet::setup (ptype type, int dst)	466	void config_packet::setup (ptype type, int dst)
449	{	467	{
450	prot_major = PROTOCOL_MAJOR;	468	prot_major = PROTOCOL_MAJOR;
451	prot_minor = PROTOCOL_MINOR;	469	prot_minor = PROTOCOL_MINOR;
452	randsize = RAND_SIZE;	470	randsize = RAND_SIZE;
453	hmaclen = HMACLENGTH;	471	hmaclen = HMACLENGTH;
454	flags = curflags ();	472	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
455	challengelen = sizeof (rsachallenge);	473	challengelen = sizeof (rsachallenge);
		474	features = FEATURES;
456		475
457	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	476	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));
458	digest_nid = htonl (EVP_MD_type (RSA_HASH));	477	digest_nid = htonl (EVP_MD_type (RSA_HASH));
459	hmac_nid = htonl (EVP_MD_type (DIGEST));	478	hmac_nid = htonl (EVP_MD_type (DIGEST));
460		479
…		…
462	set_hdr (type, dst);	481	set_hdr (type, dst);
463	}	482	}
464		483
465	bool config_packet::chk_config () const	484	bool config_packet::chk_config () const
466	{	485	{
467	return prot_major == PROTOCOL_MAJOR	486	if (prot_major != PROTOCOL_MAJOR)
468	&& randsize == RAND_SIZE	487	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
469	&& hmaclen == HMACLENGTH	488	else if (randsize != RAND_SIZE)
470	&& flags == curflags ()	489	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
		490	else if (hmaclen != HMACLENGTH)
		491	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
471	&& challengelen == sizeof (rsachallenge)	496	else if (challengelen != sizeof (rsachallenge))
		497	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
472	&& cipher_nid == htonl (EVP_CIPHER_nid (CIPHER))	498	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));
473	&& digest_nid == htonl (EVP_MD_type (RSA_HASH))	500	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
		501	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
474	&& hmac_nid == htonl (EVP_MD_type (DIGEST));	502	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))
		503	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));
		504	else
		505	return true;
		506
		507	return false;
475	}	508	}
476		509
477	struct auth_req_packet : config_packet	510	struct auth_req_packet : config_packet
478	{	511	{
479	char magic[8];	512	char magic[8];
480	u8 initiate; // false if this is just an automatic reply	513	u8 initiate; // false if this is just an automatic reply
481	u8 protocols; // supported protocols (will get patches on forward)	514	u8 protocols; // supported protocols (will be patched on forward)
482	u8 pad2, pad3;	515	u8 pad2, pad3;
483	rsaid id;	516	rsaid id;
484	rsaencrdata encr;	517	rsaencrdata encr;
485		518
486	auth_req_packet (int dst, bool initiate_, u8 protocols_)	519	auth_req_packet (int dst, bool initiate_, u8 protocols_)
…		…
541	};	574	};
542		575
543	/////////////////////////////////////////////////////////////////////////////	576	/////////////////////////////////////////////////////////////////////////////
544		577
545	void	578	void
		579	connection::connection_established ()
		580	{
		581	if (ictx && octx)
		582	{
		583	connectmode = conf->connectmode;
		584
		585	rekey.start (NOW + ::conf.rekey);
		586	keepalive.start (NOW + ::conf.keepalive);
		587
		588	// send queued packets
		589	if (ictx && octx)
		590	{
		591	while (tap_packet p = (tap_packet )data_queue.get ())
		592	{
		593	send_data_packet (p);
		594	delete p;
		595	}
		596
		597	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		598	{
		599	send_vpn_packet (p, si, IPTOS_RELIABILITY);
		600	delete p;
		601	}
		602	}
		603	}
		604	else
		605	{
		606	retry_cnt = 0;
		607	establish_connection.start (NOW + 5);
		608	keepalive.stop ();
		609	rekey.stop ();
		610	}
		611	}
		612
		613	void
546	connection::reset_dstaddr ()	614	connection::reset_si ()
547	{	615	{
		616	protocol = best_protocol (THISNODE->protocols & conf->protocols);
		617
		618	// mask out protocols we cannot establish
		619	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
		620	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
		621
548	si.set (conf);	622	si.set (conf, protocol);
		623	}
		624
		625	// ensure sockinfo is valid, forward if necessary
		626	const sockinfo &
		627	connection::forward_si (const sockinfo &si) const
		628	{
		629	if (!si.valid ())
		630	{
		631	connection *r = vpn->find_router ();
		632
		633	if (r)
		634	{
		635	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),
		636	conf->nodename, r->conf->nodename);
		637	return r->si;
		638	}
		639	else
		640	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),
		641	conf->nodename);
		642	}
		643
		644	return si;
		645	}
		646
		647	void
		648	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		649	{
		650	if (!vpn->send_vpn_packet (pkt, si, tos))
		651	reset_connection ();
549	}	652	}
550		653
551	void	654	void
552	connection::send_ping (const sockinfo &si, u8 pong)	655	connection::send_ping (const sockinfo &si, u8 pong)
553	{	656	{
…		…
576	void	679	void
577	connection::send_auth_request (const sockinfo &si, bool initiate)	680	connection::send_auth_request (const sockinfo &si, bool initiate)
578	{	681	{
579	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	682	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
580		683
581	protocol = best_protocol (THISNODE->protocols & conf->protocols);
582
583	rsachallenge chg;	684	rsachallenge chg;
584
585	rsa_cache.gen (pkt->id, chg);	685	rsa_cache.gen (pkt->id, chg);
586		686	rsa_encrypt (conf->rsa_key, chg, pkt->encr);
587	if (0 > RSA_public_encrypt (sizeof chg,
588	(unsigned char )&chg, (unsigned char )&pkt->encr,
589	conf->rsa_key, RSA_PKCS1_OAEP_PADDING))
590	fatal ("RSA_public_encrypt error");
591		687
592	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	688	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);
593		689
594	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	690	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
595		691
596	delete pkt;	692	delete pkt;
597	}	693	}
598		694
599	void	695	void
…		…
627		723
628	delete r;	724	delete r;
629	}	725	}
630		726
631	void	727	void
632	connection::establish_connection_cb (tstamp &ts)	728	connection::establish_connection_cb (time_watcher &w)
633	{	729	{
634	if (ictx \|\| conf == THISNODE	730	if (!ictx
		731	&& conf != THISNODE
635	\|\| connectmode == conf_node::C_NEVER	732	&& connectmode != conf_node::C_NEVER
636	\|\| connectmode == conf_node::C_DISABLED)	733	&& connectmode != conf_node::C_DISABLED
637	ts = TSTAMP_CANCEL;	734	&& NOW > w.at)
638	else if (ts <= NOW)
639	{	735	{
640	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	736	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;
641		737
642	if (retry_int < 3600 * 8)	738	if (retry_int < 3600 * 8)
643	retry_cnt++;	739	retry_cnt++;
644		740
645	ts = NOW + retry_int;	741	w.start (NOW + retry_int);
646		742
647	if (conf->hostname)	743	reset_si ();
		744
		745	if (si.prot && !si.host)
		746	vpn->send_connect_request (conf->id);
		747	else
648	{	748	{
649	reset_dstaddr ();	749	const sockinfo &dsi = forward_si (si);
		750
650	if (si.host && auth_rate_limiter.can (si))	751	if (dsi.valid () && auth_rate_limiter.can (dsi))
651	{	752	{
652	if (retry_cnt < 4)	753	if (retry_cnt < 4)
653	send_auth_request (si, true);	754	send_auth_request (dsi, true);
654	else	755	else
655	send_ping (si, 0);	756	send_ping (dsi, 0);
656	}	757	}
657	}	758	}
658	else
659	vpn->connect_request (conf->id);
660	}	759	}
661	}	760	}
662		761
663	void	762	void
664	connection::reset_connection ()	763	connection::reset_connection ()
…		…
678	si.host= 0;	777	si.host= 0;
679		778
680	last_activity = 0;	779	last_activity = 0;
681	retry_cnt = 0;	780	retry_cnt = 0;
682		781
683	rekey.reset ();	782	rekey.stop ();
684	keepalive.reset ();	783	keepalive.stop ();
685	establish_connection.reset ();	784	establish_connection.stop ();
686	}	785	}
687		786
688	void	787	void
689	connection::shutdown ()	788	connection::shutdown ()
690	{	789	{
…		…
693		792
694	reset_connection ();	793	reset_connection ();
695	}	794	}
696		795
697	void	796	void
698	connection::rekey_cb (tstamp &ts)	797	connection::rekey_cb (time_watcher &w)
699	{	798	{
700	ts = TSTAMP_CANCEL;
701
702	reset_connection ();	799	reset_connection ();
703	establish_connection ();	800	establish_connection ();
704	}	801	}
705		802
706	void	803	void
707	connection::send_data_packet (tap_packet *pkt, bool broadcast)	804	connection::send_data_packet (tap_packet *pkt)
708	{	805	{
709	vpndata_packet *p = new vpndata_packet;	806	vpndata_packet *p = new vpndata_packet;
710	int tos = 0;	807	int tos = 0;
711		808
712	if (conf->inherit_tos	809	// I am not hilarious about peeking into packets, but so be it.
713	&& (pkt)[12] == 0x08 && (pkt)[13] == 0x00 // IP	810	if (conf->inherit_tos && pkt->is_ipv4 ())
714	&& ((*pkt)[14] & 0xf0) == 0x40) // IPv4
715	tos = (*pkt)[15] & IPTOS_TOS_MASK;	811	tos = (*pkt)[15] & IPTOS_TOS_MASK;
716		812
717	p->setup (this, broadcast ? 0 : conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs	813	p->setup (this, conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs
718	send_vpn_packet (p, si, tos);	814	send_vpn_packet (p, si, tos);
719		815
720	delete p;	816	delete p;
721		817
722	if (oseqno > MAX_SEQNO)	818	if (oseqno > MAX_SEQNO)
723	rekey ();	819	rekey ();
724	}	820	}
725		821
726	void	822	void
727	connection::inject_data_packet (tap_packet *pkt, bool broadcast)	823	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)
728	{	824	{
729	if (ictx && octx)	825	if (ictx && octx)
730	send_data_packet (pkt, broadcast);	826	send_data_packet (pkt);
731	else	827	else
732	{	828	{
733	if (!broadcast)//DDDD	829	if (!broadcast)//DDDD
734	queue.put (new tap_packet (*pkt));	830	data_queue.put (new tap_packet (*pkt));
		831
		832	establish_connection ();
		833	}
		834	}
		835
		836	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)
		837	{
		838	if (ictx && octx)
		839	send_vpn_packet (pkt, si, tos);
		840	else
		841	{
		842	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
735		843
736	establish_connection ();	844	establish_connection ();
737	}	845	}
738	}	846	}
739		847
…		…
745	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	853	slog (L_NOISE, "<<%d received packet type %d from %d to %d",
746	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	854	conf->id, pkt->typ (), pkt->src (), pkt->dst ());
747		855
748	switch (pkt->typ ())	856	switch (pkt->typ ())
749	{	857	{
750	case vpn_packet::PT_PING:	858	case vpn_packet::PT_PING:
751	// we send pings instead of auth packets after some retries,	859	// we send pings instead of auth packets after some retries,
752	// so reset the retry counter and establish a connection	860	// so reset the retry counter and establish a connection
753	// when we receive a ping.	861	// when we receive a ping.
754	if (!ictx)	862	if (!ictx)
		863	{
		864	if (auth_rate_limiter.can (rsi))
		865	send_auth_request (rsi, true);
		866	}
		867	else
		868	send_ping (rsi, 1); // pong
		869
		870	break;
		871
		872	case vpn_packet::PT_PONG:
		873	break;
		874
		875	case vpn_packet::PT_RESET:
755	{	876	{
756	if (auth_rate_limiter.can (rsi))	877	reset_connection ();
757	send_auth_request (rsi, true);	878
		879	config_packet p = (config_packet ) pkt;
		880
		881	if (!p->chk_config ())
		882	{
		883	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
		884	conf->nodename, (const char *)rsi);
		885	connectmode = conf_node::C_DISABLED;
		886	}
		887	else if (connectmode == conf_node::C_ALWAYS)
		888	establish_connection ();
758	}	889	}
759	else
760	send_ping (rsi, 1); // pong
761
762	break;	890	break;
763		891
764	case vpn_packet::PT_PONG:
765	break;
766
767	case vpn_packet::PT_RESET:	892	case vpn_packet::PT_AUTH_REQ:
768	{	893	if (auth_rate_limiter.can (rsi))
769	reset_connection ();
770
771	config_packet p = (config_packet ) pkt;
772
773	if (!p->chk_config ())
774	{	894	{
		895	auth_req_packet p = (auth_req_packet ) pkt;
		896
		897	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);
		898
		899	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))
		900	{
		901	if (p->prot_minor != PROTOCOL_MINOR)
		902	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
		903	conf->nodename, (const char *)rsi,
		904	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
		905
		906	if (p->initiate)
		907	send_auth_request (rsi, false);
		908
		909	rsachallenge k;
		910
		911	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))
		912	{
		913	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
		914	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
		915	break;
		916	}
		917	else
		918	{
		919	delete octx;
		920
		921	octx = new crypto_ctx (k, 1);
		922	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;
		923
		924	// compatibility code, remove when no longer required
		925	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
		926
		927	conf->protocols = p->protocols;
		928	features = p->features & FEATURES;
		929
		930	send_auth_response (rsi, p->id, k);
		931
		932	connection_established ();
		933
		934	break;
		935	}
		936	}
		937	else
775	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	938	slog (L_WARN, _("%s(%s): protocol mismatch"),
776	conf->nodename, (const char *)rsi);	939	conf->nodename, (const char *)rsi);
777	connectmode = conf_node::C_DISABLED;	940
		941	send_reset (rsi);
778	}	942	}
779	else if (connectmode == conf_node::C_ALWAYS)	943
780	establish_connection ();
781	}
782	break;	944	break;
783		945
784	case vpn_packet::PT_AUTH_REQ:	946	case vpn_packet::PT_AUTH_RES:
785	if (auth_rate_limiter.can (rsi))
786	{	947	{
787	auth_req_packet p = (auth_req_packet ) pkt;	948	auth_res_packet p = (auth_res_packet ) pkt;
788		949
789	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	950	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);
790		951
791	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	952	if (p->chk_config ())
792	{	953	{
793	if (p->prot_minor != PROTOCOL_MINOR)	954	if (p->prot_minor != PROTOCOL_MINOR)
794	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	955	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
795	conf->nodename, (const char *)rsi,	956	conf->nodename, (const char *)rsi,
796	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	957	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
797		958
798	if (p->initiate)
799	send_auth_request (rsi, false);
800
801	rsachallenge k;	959	rsachallenge chg;
802		960
803	if (0 > RSA_private_decrypt (sizeof (p->encr),	961	if (!rsa_cache.find (p->id, chg))
804	(unsigned char )&p->encr, (unsigned char )&k,	962	{
805	::conf.rsa_key, RSA_PKCS1_OAEP_PADDING))	963	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),
806	slog (L_ERR, _("%s(%s): challenge illegal or corrupted"),
807	conf->nodename, (const char *)rsi);	964	conf->nodename, (const char *)rsi);
		965	break;
		966	}
808	else	967	else
809	{	968	{
810	retry_cnt = 0;	969	crypto_ctx *cctx = new crypto_ctx (chg, 0);
811	establish_connection.set (NOW + 8); //? ;)	970
812	keepalive.reset ();	971	if (!p->hmac_chk (cctx))
		972	{
		973	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"),
		975	conf->nodename, (const char *)rsi);
		976	break;
		977	}
813	rekey.reset ();	978	else
		979	{
		980	rsaresponse h;
814		981
		982	rsa_hash (p->id, chg, h);
		983
		984	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
		985	{
		986	prot_minor = p->prot_minor;
		987
		988	delete ictx; ictx = cctx;
		989
		990	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
		991
		992	si = rsi;
		993	protocol = rsi.prot;
		994
		995	connection_established ();
		996
		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)
		1002	run_script (run_script_cb (this, &connection::script_node_up), false);
		1003
		1004	break;
		1005	}
		1006	else
		1007	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
		1008	conf->nodename, (const char *)rsi);
		1009	}
		1010
815	delete ictx;	1011	delete cctx;
816	ictx = 0;
817
818	delete octx;
819
820	octx = new crypto_ctx (k, 1);
821	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;
822
823	conf->protocols = p->protocols;
824	send_auth_response (rsi, p->id, k);
825
826	break;
827	}	1012	}
828	}	1013	}
829
830	send_reset (rsi);
831	}	1014	}
832		1015
		1016	send_reset (rsi);
833	break;	1017	break;
834		1018
835	case vpn_packet::PT_AUTH_RES:	1019	case vpn_packet::PT_DATA_COMPRESSED:
836	{	1020	#if !ENABLE_COMPRESSION
837	auth_res_packet p = (auth_res_packet ) pkt;	1021	send_reset (rsi);
		1022	break;
		1023	#endif
838		1024
839	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1025	case vpn_packet::PT_DATA_UNCOMPRESSED:
840		1026
841	if (p->chk_config ())	1027	if (ictx && octx)
842	{	1028	{
843	if (p->prot_minor != PROTOCOL_MINOR)	1029	vpndata_packet p = (vpndata_packet )pkt;
844	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
845	conf->nodename, (const char *)rsi,
846	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
847		1030
848	rsachallenge chg;	1031	if (!p->hmac_chk (ictx))
849		1032	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
850	if (!rsa_cache.find (p->id, chg))	1033	"could be an attack, or just corruption or a synchronization error"),
851	slog (L_ERR, _("%s(%s): unrequested auth response"),
852	conf->nodename, (const char *)rsi);	1034	conf->nodename, (const char *)rsi);
853	else	1035	else
854	{	1036	{
855	crypto_ctx *cctx = new crypto_ctx (chg, 0);
856
857	if (!p->hmac_chk (cctx))
858	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
859	"could be an attack, or just corruption or an synchronization error"),
860	conf->nodename, (const char *)rsi);
861	else	1037	u32 seqno;
		1038	tap_packet *d = p->unpack (this, seqno);
		1039
		1040	if (iseqno.recv_ok (seqno))
862	{	1041	{
863	rsaresponse h;	1042	vpn->tap->send (d);
864		1043
865	rsa_hash (p->id, chg, h);	1044	if (si != rsi)
866
867	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
868	{	1045	{
869	prot_minor = p->prot_minor;	1046	// fast re-sync on connection changes, useful especially for tcp/ip
870
871	delete ictx; ictx = cctx;
872
873	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
874
875	si = rsi;	1047	si = rsi;
876		1048
877	rekey.set (NOW + ::conf.rekey);	1049	slog (L_INFO, _("%s(%s): socket address changed to %s"),
878	keepalive.set (NOW + ::conf.keepalive);
879
880	// send queued packets
881	while (tap_packet *p = queue.get ())
882	{
883	send_data_packet (p);
884	delete p;
885	}
886
887	connectmode = conf->connectmode;
888
889	slog (L_INFO, _("%s(%s): %s connection established, protocol version %d.%d"),
890	conf->nodename, (const char *)rsi,	1050	conf->nodename, (const char )si, (const char )rsi);
891	strprotocol (protocol),
892	p->prot_major, p->prot_minor);
893
894	if (::conf.script_node_up)
895	run_script (run_script_cb (this, &connection::script_node_up), false);
896
897	break;
898	}	1051	}
		1052
899	else	1053	delete d;
900	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),	1054
901	conf->nodename, (const char *)rsi);	1055	break;
902	}	1056	}
903
904	delete cctx;
905	}	1057	}
906	}	1058	}
907	}
908		1059
909	send_reset (rsi);	1060	send_reset (rsi);
910	break;	1061	break;
911		1062
912	case vpn_packet::PT_DATA_COMPRESSED:
913	#if !ENABLE_COMPRESSION
914	send_reset (rsi);
915	break;
916	#endif
917
918	case vpn_packet::PT_DATA_UNCOMPRESSED:
919
920	if (ictx && octx)
921	{
922	vpndata_packet p = (vpndata_packet )pkt;
923
924	if (rsi == si)
925	{
926	if (!p->hmac_chk (ictx))
927	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
928	"could be an attack, or just corruption or an synchronization error"),
929	conf->nodename, (const char *)rsi);
930	else
931	{
932	u32 seqno;
933	tap_packet *d = p->unpack (this, seqno);
934
935	if (iseqno.recv_ok (seqno))
936	{
937	vpn->tap->send (d);
938
939	if (p->dst () == 0) // re-broadcast
940	for (vpn::conns_vector::iterator i = vpn->conns.begin (); i != vpn->conns.end (); ++i)
941	{
942	connection c = i;
943
944	if (c->conf != THISNODE && c->conf != conf)
945	c->inject_data_packet (d);
946	}
947
948	delete d;
949
950	break;
951	}
952	}
953	}
954	else
955	slog (L_ERR, _("received data packet from unknown source %s"), (const char *)rsi);
956	}
957
958	send_reset (rsi);
959	break;
960
961	case vpn_packet::PT_CONNECT_REQ:	1063	case vpn_packet::PT_CONNECT_REQ:
962	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1064	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
963	{	1065	{
964	connect_req_packet p = (connect_req_packet ) pkt;	1066	connect_req_packet p = (connect_req_packet ) pkt;
965		1067
966	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1068	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything
967	conf->protocols = p->protocols;
968	connection *c = vpn->conns[p->id - 1];	1069	connection *c = vpn->conns[p->id - 1];
		1070	conf->protocols = p->protocols;
969		1071
970	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",	1072	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
971	conf->id, p->id, c->ictx && c->octx);	1073	conf->id, p->id, c->ictx && c->octx);
972		1074
973	if (c->ictx && c->octx)	1075	if (c->ictx && c->octx)
974	{	1076	{
975	// send connect_info packets to both sides, in case one is	1077	// send connect_info packets to both sides, in case one is
976	// behind a nat firewall (or both ;)	1078	// behind a nat firewall (or both ;)
977	c->send_connect_info (conf->id, si, conf->protocols);	1079	c->send_connect_info (conf->id, si, conf->protocols);
978	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1080	send_connect_info (c->conf->id, c->si, c->conf->protocols);
979	}	1081	}
		1082	else
		1083	c->establish_connection ();
980	}	1084	}
981		1085
982	break;	1086	break;
983		1087
984	case vpn_packet::PT_CONNECT_INFO:	1088	case vpn_packet::PT_CONNECT_INFO:
985	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1089	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
986	{	1090	{
987	connect_info_packet p = (connect_info_packet ) pkt;	1091	connect_info_packet p = (connect_info_packet ) pkt;
988		1092
989	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1093	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything
990	conf->protocols = p->protocols;	1094
991	connection *c = vpn->conns[p->id - 1];	1095	connection *c = vpn->conns[p->id - 1];
992		1096
		1097	c->conf->protocols = p->protocols;
		1098	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
		1099	p->si.upgrade_protocol (protocol, c->conf);
		1100
993	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1101	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",
994	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1102	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);
995		1103
		1104	const sockinfo &dsi = forward_si (p->si);
		1105
		1106	if (dsi.valid ())
996	c->send_auth_request (p->si, true);	1107	c->send_auth_request (dsi, true);
997	}	1108	}
998		1109
999	break;	1110	break;
1000		1111
1001	default:	1112	default:
1002	send_reset (rsi);	1113	send_reset (rsi);
1003	break;	1114	break;
1004
1005	}	1115	}
1006	}	1116	}
1007		1117
1008	void connection::keepalive_cb (tstamp &ts)	1118	void connection::keepalive_cb (time_watcher &w)
1009	{	1119	{
1010	if (NOW >= last_activity + ::conf.keepalive + 30)	1120	if (NOW >= last_activity + ::conf.keepalive + 30)
1011	{	1121	{
1012	reset_connection ();	1122	reset_connection ();
1013	establish_connection ();	1123	establish_connection ();
1014	}	1124	}
1015	else if (NOW < last_activity + ::conf.keepalive)	1125	else if (NOW < last_activity + ::conf.keepalive)
1016	ts = last_activity + ::conf.keepalive;	1126	w.start (last_activity + ::conf.keepalive);
1017	else if (conf->connectmode != conf_node::C_ONDEMAND	1127	else if (conf->connectmode != conf_node::C_ONDEMAND
1018	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1128	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1019	{	1129	{
1020	send_ping (si);	1130	send_ping (si);
1021	ts = NOW + 5;	1131	w.start (NOW + 5);
1022	}	1132	}
		1133	else if (NOW < last_activity + ::conf.keepalive + 10)
		1134	// hold ondemand connections implicitly a few seconds longer
		1135	// should delete octx, though, or something like that ;)
		1136	w.start (last_activity + ::conf.keepalive + 10);
1023	else	1137	else
1024	reset_connection ();	1138	reset_connection ();
1025	}	1139	}
1026		1140
1027	void connection::connect_request (int id)	1141	void connection::send_connect_request (int id)
1028	{	1142	{
1029	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1143	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);
1030		1144
1031	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1145	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);
1032	p->hmac_set (octx);	1146	p->hmac_set (octx);
…		…
1035	delete p;	1149	delete p;
1036	}	1150	}
1037		1151
1038	void connection::script_node ()	1152	void connection::script_node ()
1039	{	1153	{
1040	vpn->script_if_up (0);	1154	vpn->script_if_up ();
1041		1155
1042	char *env;	1156	char *env;
1043	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1157	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
1044	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1158	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1045	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1159	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1046	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1160	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1047	}	1161	}
1048		1162
1049	const char *connection::script_node_up (int)	1163	const char *connection::script_node_up ()
1050	{	1164	{
1051	script_node ();	1165	script_node ();
1052		1166
1053	putenv ("STATE=up");	1167	putenv ("STATE=up");
1054		1168
1055	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1169	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";
1056	}	1170	}
1057		1171
1058	const char *connection::script_node_down (int)	1172	const char *connection::script_node_down ()
1059	{	1173	{
1060	script_node ();	1174	script_node ();
1061		1175
1062	putenv ("STATE=down");	1176	putenv ("STATE=down");
1063		1177
1064	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1178	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";
1065	}
1066
1067	// send a vpn packet out to other hosts
1068	void
1069	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
1070	{
1071	if (protocol & PROT_IPv4)
1072	vpn->send_ipv4_packet (pkt, si, tos);
1073	else
1074	vpn->send_udpv4_packet (pkt, si, tos);
1075	}	1179	}
1076		1180
1077	connection::connection(struct vpn *vpn_)	1181	connection::connection(struct vpn *vpn_)
1078	: vpn(vpn_)	1182	: vpn(vpn_)
1079	, rekey (this, &connection::rekey_cb)	1183	, rekey (this, &connection::rekey_cb)

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Comparing gvpe/src/connection.C (file contents): Revision 1.1 by pcg, Wed Apr 2 03:06:22 2003 UTC vs. Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.1 by pcg, Wed Apr 2 03:06:22 2003 UTC vs.
Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 UTC