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

Comparing gvpe/src/connection.C (file contents):
Revision 1.57 by pcg, Thu Jul 7 14:41:51 2005 UTC vs.
Revision 1.103 by root, Thu Jul 18 17:35:10 2013 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
5	This file is part of GVPE.	5	This file is part of GVPE.
6		6
7	GVPE is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
8	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
9	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
10	(at your option) any later version.	10	option) any later version.
11		11
12	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15	GNU General Public License for more details.	15	Public License for more details.
16		16
17	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
18	along with gvpe; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
19	Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
25		37
26	#include <openssl/rand.h>	38	#include <openssl/rand.h>
27	#include <openssl/evp.h>	39	#include <openssl/evp.h>
28	#include <openssl/rsa.h>	40	#include <openssl/rsa.h>
29	#include <openssl/err.h>	41	#include <openssl/err.h>
31	#include "conf.h"	43	#include "conf.h"
32	#include "slog.h"	44	#include "slog.h"
33	#include "device.h"	45	#include "device.h"
34	#include "vpn.h"	46	#include "vpn.h"
35	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
36		49
37	#include "netcompat.h"	50	#include "netcompat.h"
38		51
39	#if !HAVE_RAND_PSEUDO_BYTES
40	# define RAND_pseudo_bytes RAND_bytes
41	#endif
42
43	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	52	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
		53	#define MAGIC "HUHN\xbd\xc6\xdb\x82" // 8 bytes of magic//D
44		54
45	#define ULTRA_FAST 1	55	#define ULTRA_FAST 1
46	#define HLOG 15	56	#define HLOG 15
47	#include "lzf/lzf.h"	57	#include "lzf/lzf.h"
48	#include "lzf/lzf_c.c"	58	#include "lzf/lzf_c.c"
49	#include "lzf/lzf_d.c"	59	#include "lzf/lzf_d.c"
50		60
		61	//////////////////////////////////////////////////////////////////////////////
		62
		63	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		64	static ev::child rs_child_ev;
		65
		66	namespace
		67	{
		68	void // c++ requires external linkage here, apparently :(
		69	rs_child_cb (ev::child &w, int revents)
		70	{
		71	w.stop ();
		72
		73	if (rs_queue.empty ())
		74	return;
		75
		76	pid_t pid = run_script (*rs_queue.front ().first, false);
		77	if (pid)
		78	{
		79	w.set (pid);
		80	w.start ();
		81	}
		82	else
		83	slog (L_WARN, rs_queue.front ().second);
		84
		85	delete rs_queue.front ().first;
		86	rs_queue.pop ();
		87	}
		88	};
		89
		90	// despite the fancy name, this is quite a hack
		91	static void
		92	run_script_queued (run_script_cb cb, const char warnmsg)
		93	{
		94	rs_queue.push (std::make_pair (cb, warnmsg));
		95
		96	if (!rs_child_ev.is_active ())
		97	{
		98	rs_child_ev.set<rs_child_cb> ();
		99	rs_child_ev ();
		100	}
		101	}
		102
		103	//////////////////////////////////////////////////////////////////////////////
		104
51	struct crypto_ctx	105	struct crypto_ctx
52	{	106	{
53	EVP_CIPHER_CTX cctx;	107	EVP_CIPHER_CTX cctx;
54	HMAC_CTX hctx;	108	HMAC_CTX hctx;
55		109
56	crypto_ctx (const rsachallenge &challenge, int enc);	110	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
57	~crypto_ctx ();	111	~crypto_ctx ();
58	};	112	};
59		113
60	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	114	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
61	{	115	{
		116	ecdh_key s;
		117
		118	curve25519_combine (a, b, s);
		119
		120	{
		121	u8 mac_key[MAC_KEYSIZE];
		122	static const unsigned char mac_info[] = "gvpe mac key";
		123
		124	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		125	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		126	kdf.extract (s, sizeof (s));
		127	kdf.extract_done (HKDF_PRF_HASH ());
		128	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		129
		130	HMAC_CTX_init (&hctx);
		131	require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		132	}
		133
		134	{
		135	u8 cipher_key[CIPHER_KEYSIZE];
		136	static const unsigned char cipher_info[] = "gvpe cipher key";
		137
		138	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		139	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		140	kdf.extract (s, sizeof (s));
		141	kdf.extract_done (HKDF_PRF_HASH ());
		142	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		143
62	EVP_CIPHER_CTX_init (&cctx);	144	EVP_CIPHER_CTX_init (&cctx);
63	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	145	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
64	HMAC_CTX_init (&hctx);	146	}
65	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
66	}	147	}
67		148
68	crypto_ctx::~crypto_ctx ()	149	crypto_ctx::~crypto_ctx ()
69	{	150	{
70	require (EVP_CIPHER_CTX_cleanup (&cctx));	151	require (EVP_CIPHER_CTX_cleanup (&cctx));
71	HMAC_CTX_cleanup (&hctx);	152	HMAC_CTX_cleanup (&hctx);
72	}	153	}
73		154
		155	static inline void
		156	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		157	{
		158	if (RSA_public_encrypt (sizeof (auth.rsa),
		159	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		160	key, RSA_PKCS1_OAEP_PADDING) < 0)
		161	fatal ("RSA_public_encrypt error");
		162
		163	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		164	}
		165
		166	static inline bool
		167	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		168	{
		169	u8 rsa_decrypt[RSA_KEYLEN];
		170
		171	if (RSA_private_decrypt (sizeof (encr.rsa),
		172	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		173	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		174	return 0;
		175
		176	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		177	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		178
		179	return 1;
		180	}
		181
74	static void	182	static void
75	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	183	auth_hash (const auth_data &auth, auth_mac &mac)
76	{	184	{
77	EVP_MD_CTX ctx;	185	HMAC_CTX ctx;
78		186
79	EVP_MD_CTX_init (&ctx);	187	HMAC_CTX_init (&ctx);
80	require (EVP_DigestInit (&ctx, RSA_HASH));	188	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
81	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));	189	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
82	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
83	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	190	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
84	EVP_MD_CTX_cleanup (&ctx);	191	HMAC_CTX_cleanup (&ctx);
85	}	192	}
86		193
87	struct rsa_entry {	194	void
88	tstamp expire;	195	connection::generate_auth_data ()
89	rsaid id;
90	rsachallenge chg;
91	};
92
93	struct rsa_cache : list<rsa_entry>
94	{	196	{
95	void cleaner_cb (time_watcher &w); time_watcher cleaner;	197	if (auth_expire < ev_now ())
96
97	bool find (const rsaid &id, rsachallenge &chg)
98	{
99	for (iterator i = begin (); i != end (); ++i)
100	{	198	{
101	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)	199	// request data
102	{	200	rand_fill (snd_auth.rsa);
103	memcpy (&chg, &i->chg, sizeof chg);	201	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
		202	auth_hash (snd_auth, snd_auth_mac);
104		203
105	erase (i);	204	// eventual response data
106	return true;	205	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
107	}
108	}	206	}
109		207
110	if (cleaner.at < NOW)	208	// every use prolongs the expiry
111	cleaner.start (NOW + RSA_TTL);	209	auth_expire = ev_now () + AUTH_TTL;
112
113	return false;
114	}
115
116	void gen (rsaid &id, rsachallenge &chg)
117	{
118	rsa_entry e;
119
120	RAND_bytes ((unsigned char *)&id, sizeof id);
121	RAND_bytes ((unsigned char *)&chg, sizeof chg);
122
123	e.expire = NOW + RSA_TTL;
124	e.id = id;
125	memcpy (&e.chg, &chg, sizeof chg);
126
127	push_back (e);
128
129	if (cleaner.at < NOW)
130	cleaner.start (NOW + RSA_TTL);
131	}
132
133	rsa_cache ()
134	: cleaner (this, &rsa_cache::cleaner_cb)
135	{ }
136
137	} rsa_cache;
138
139	void rsa_cache::cleaner_cb (time_watcher &w)
140	{
141	if (!empty ())
142	{
143	w.start (NOW + RSA_TTL);
144
145	for (iterator i = begin (); i != end (); )
146	if (i->expire <= NOW)
147	i = erase (i);
148	else
149	++i;
150	}
151	}	210	}
152		211
153	//////////////////////////////////////////////////////////////////////////////	212	//////////////////////////////////////////////////////////////////////////////
154		213
155	void pkt_queue::put (net_packet *p)	214	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		215	: max_ttl (max_ttl), max_queue (max_queue)
156	{	216	{
157	if (queue[i])	217	queue = new pkt [max_queue];
158	{
159	delete queue[i];
160	j = (j + 1) % QUEUEDEPTH;
161	}
162		218
163	queue[i] = p;
164
165	i = (i + 1) % QUEUEDEPTH;
166	}
167
168	net_packet *pkt_queue::get ()
169	{
170	net_packet *p = queue[j];
171
172	if (p)
173	{
174	queue[j] = 0;
175	j = (j + 1) % QUEUEDEPTH;
176	}
177
178	return p;
179	}
180
181	pkt_queue::pkt_queue ()
182	{
183	memset (queue, 0, sizeof (queue));
184	i = 0;	219	i = 0;
185	j = 0;	220	j = 0;
		221
		222	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
186	}	223	}
187		224
188	pkt_queue::~pkt_queue ()	225	pkt_queue::~pkt_queue ()
189	{	226	{
190	for (i = QUEUEDEPTH; --i > 0; )	227	while (net_packet *p = get ())
		228	delete p;
		229
191	delete queue[i];	230	delete [] queue;
192	}	231	}
193		232
		233	void
		234	pkt_queue::expire_cb (ev::timer &w, int revents)
		235	{
		236	ev_tstamp expire = ev_now () - max_ttl;
		237
		238	for (;;)
		239	{
		240	if (empty ())
		241	break;
		242
		243	double diff = queue[j].tstamp - expire;
		244
		245	if (diff >= 0.)
		246	{
		247	w.start (diff > 0.5 ? diff : 0.5);
		248	break;
		249	}
		250
		251	delete get ();
		252	}
		253	}
		254
		255	void
		256	pkt_queue::put (net_packet *p)
		257	{
		258	ev_tstamp now = ev_now ();
		259
		260	// start expiry timer
		261	if (empty ())
		262	expire.start (max_ttl);
		263
		264	int ni = i + 1 == max_queue ? 0 : i + 1;
		265
		266	if (ni == j)
		267	delete get ();
		268
		269	queue[i].pkt = p;
		270	queue[i].tstamp = now;
		271
		272	i = ni;
		273	}
		274
		275	net_packet *
		276	pkt_queue::get ()
		277	{
		278	if (empty ())
		279	return 0;
		280
		281	net_packet *p = queue[j].pkt;
		282	queue[j].pkt = 0;
		283
		284	j = j + 1 == max_queue ? 0 : j + 1;
		285
		286	return p;
		287	}
		288
194	struct net_rateinfo {	289	struct net_rateinfo
		290	{
195	u32 host;	291	u32 host;
196	double pcnt, diff;	292	double pcnt, diff;
197	tstamp last;	293	tstamp last;
198	};	294	};
199		295
…		…
209		305
210	bool can (const sockinfo &si) { return can((u32)si.host); }	306	bool can (const sockinfo &si) { return can((u32)si.host); }
211	bool can (u32 host);	307	bool can (u32 host);
212	};	308	};
213		309
214	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	310	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
215		311
		312	bool
216	bool net_rate_limiter::can (u32 host)	313	net_rate_limiter::can (u32 host)
217	{	314	{
218	iterator i;	315	iterator i;
219		316
220	for (i = begin (); i != end (); )	317	for (i = begin (); i != end (); )
221	if (i->host == host)	318	if (i->host == host)
222	break;	319	break;
223	else if (i->last < NOW - NRL_EXPIRE)	320	else if (i->last < ev_now () - NRL_EXPIRE)
224	i = erase (i);	321	i = erase (i);
225	else	322	else
226	i++;	323	i++;
227		324
228	if (i == end ())	325	if (i == end ())
…		…
230	net_rateinfo ri;	327	net_rateinfo ri;
231		328
232	ri.host = host;	329	ri.host = host;
233	ri.pcnt = 1.;	330	ri.pcnt = 1.;
234	ri.diff = NRL_MAXDIF;	331	ri.diff = NRL_MAXDIF;
235	ri.last = NOW;	332	ri.last = ev_now ();
236		333
237	push_front (ri);	334	push_front (ri);
238		335
239	return true;	336	return true;
240	}	337	}
…		…
242	{	339	{
243	net_rateinfo ri (*i);	340	net_rateinfo ri (*i);
244	erase (i);	341	erase (i);
245		342
246	ri.pcnt = ri.pcnt * NRL_ALPHA;	343	ri.pcnt = ri.pcnt * NRL_ALPHA;
247	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	344	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
248		345
249	ri.last = NOW;	346	ri.last = ev_now ();
250		347
251	double dif = ri.diff / ri.pcnt;	348	double dif = ri.diff / ri.pcnt;
252		349
253	bool send = dif > NRL_CUTOFF;	350	bool send = dif > NRL_CUTOFF;
254		351
…		…
268		365
269	/////////////////////////////////////////////////////////////////////////////	366	/////////////////////////////////////////////////////////////////////////////
270		367
271	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	368	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
272		369
		370	void
273	void hmac_packet::hmac_gen (crypto_ctx *ctx)	371	hmac_packet::hmac_gen (crypto_ctx *ctx)
274	{	372	{
275	unsigned int xlen;	373	unsigned int xlen;
276		374
277	HMAC_CTX *hctx = &ctx->hctx;	375	HMAC_CTX *hctx = &ctx->hctx;
278		376
279	HMAC_Init_ex (hctx, 0, 0, 0, 0);	377	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
280	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	378	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
281	len - sizeof (hmac_packet));	379	len - sizeof (hmac_packet)));
282	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	380	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
283	}	381	}
284		382
285	void	383	void
286	hmac_packet::hmac_set (crypto_ctx *ctx)	384	hmac_packet::hmac_set (crypto_ctx *ctx)
287	{	385	{
…		…
296	hmac_gen (ctx);	394	hmac_gen (ctx);
297		395
298	return !memcmp (hmac, hmac_digest, HMACLENGTH);	396	return !memcmp (hmac, hmac_digest, HMACLENGTH);
299	}	397	}
300		398
		399	void
301	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	400	vpn_packet::set_hdr (ptype type_, unsigned int dst)
302	{	401	{
303	type = type_;	402	type = type_;
304		403
305	int src = THISNODE->id;	404	int src = THISNODE->id;
306		405
…		…
311		410
312	#define MAXVPNDATA (MAX_MTU - 6 - 6)	411	#define MAXVPNDATA (MAX_MTU - 6 - 6)
313	#define DATAHDR (sizeof (u32) + RAND_SIZE)	412	#define DATAHDR (sizeof (u32) + RAND_SIZE)
314		413
315	struct vpndata_packet : vpn_packet	414	struct vpndata_packet : vpn_packet
		415	{
		416	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		417
		418	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		419	tap_packet unpack (connection conn, u32 &seqno);
		420
		421	private:
		422	const u32 data_hdr_size () const
316	{	423	{
317	u8 data[MAXVPNDATA + DATAHDR]; // seqno
318
319	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
320	tap_packet unpack (connection conn, u32 &seqno);
321	private:
322
323	const u32 data_hdr_size () const
324	{
325	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	424	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
326	}
327	};	425	}
		426	};
328		427
329	void	428	void
330	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	429	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
331	{	430	{
332	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	431	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
334	ptype type = PT_DATA_UNCOMPRESSED;	433	ptype type = PT_DATA_UNCOMPRESSED;
335		434
336	#if ENABLE_COMPRESSION	435	#if ENABLE_COMPRESSION
337	u8 cdata[MAX_MTU];	436	u8 cdata[MAX_MTU];
338		437
339	if (conn->features & ENABLE_COMPRESSION)	438	if (conn->features & FEATURE_COMPRESSION)
340	{	439	{
341	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	440	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
342		441
343	if (cl)	442	if (cl)
344	{	443	{
…		…
350	d[1] = cl;	449	d[1] = cl;
351	}	450	}
352	}	451	}
353	#endif	452	#endif
354		453
355	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	454	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
356		455
357	struct {	456	struct {
358	#if RAND_SIZE	457	#if RAND_SIZE
359	u8 rnd[RAND_SIZE];	458	u8 rnd[RAND_SIZE];
360	#endif	459	#endif
361	u32 seqno;	460	u32 seqno;
362	} datahdr;	461	} datahdr;
363		462
364	datahdr.seqno = ntohl (seqno);	463	datahdr.seqno = ntohl (seqno);
365	#if RAND_SIZE	464	#if RAND_SIZE
366	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	465	// NB: a constant (per session) random prefix
		466	// is likely enough, but we don't take any chances.
		467	conn->oiv.get (datahdr.rnd, RAND_SIZE);
367	#endif	468	#endif
368		469
369	require (EVP_EncryptUpdate (cctx,	470	require (EVP_EncryptUpdate (cctx,
370	(unsigned char *) data + outl, &outl2,	471	(unsigned char *) data + outl, &outl2,
371	(unsigned char *) &datahdr, DATAHDR));	472	(unsigned char *) &datahdr, DATAHDR));
…		…
393	int outl = 0, outl2;	494	int outl = 0, outl2;
394	tap_packet *p = new tap_packet;	495	tap_packet *p = new tap_packet;
395	u8 *d;	496	u8 *d;
396	u32 l = len - data_hdr_size ();	497	u32 l = len - data_hdr_size ();
397		498
398	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	499	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
399		500
400	#if ENABLE_COMPRESSION	501	#if ENABLE_COMPRESSION
401	u8 cdata[MAX_MTU];	502	u8 cdata[MAX_MTU];
402		503
403	if (type == PT_DATA_COMPRESSED)	504	if (type == PT_DATA_COMPRESSED)
404	d = cdata;	505	d = cdata;
405	else	506	else
406	#endif	507	#endif
407	d = &(*p)[6 + 6 - DATAHDR];	508	d = &(*p)[6 + 6] - DATAHDR;
408		509
409	/* this overwrites part of the src mac, but we fix that later */	510	// we play do evil games with the struct layout atm.
		511	// pending better solutions, we at least do some verification.
		512	// this is fine, as we left ISO territory long ago.
		513	require (DATAHDR <= 16);
		514	require ((u8 )(&p->len + 1) == &(p)[0]);
		515
		516	// this can overwrite the len/dst/src fields
410	require (EVP_DecryptUpdate (cctx,	517	require (EVP_DecryptUpdate (cctx,
411	d, &outl2,	518	d, &outl2,
412	(unsigned char *)&data, len - data_hdr_size ()));	519	(unsigned char *)&data, len - data_hdr_size ()));
413	outl += outl2;	520	outl += outl2;
414		521
…		…
445	}	552	}
446	};	553	};
447		554
448	struct config_packet : vpn_packet	555	struct config_packet : vpn_packet
449	{	556	{
450	// actually, hmaclen cannot be checked because the hmac	557	u8 serial[SERIAL_SIZE];
451	// field comes before this data, so peers with other
452	// hmacs simply will not work.
453	u8 prot_major, prot_minor, randsize, hmaclen;	558	u8 prot_major, prot_minor, randsize;
454	u8 flags, challengelen, features, pad3;	559	u8 flags, features, pad6, pad7, pad8;
455	u32 cipher_nid, digest_nid, hmac_nid;	560	u32 cipher_nid, mac_nid, auth_nid;
456		561
457	void setup (ptype type, int dst);	562	void setup (ptype type, int dst);
458	bool chk_config () const;	563	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
459		564
460	static u8 get_features ()	565	static u8 get_features ()
461	{	566	{
462	u8 f = 0;	567	u8 f = 0;
463	#if ENABLE_COMPRESSION	568	#if ENABLE_COMPRESSION
464	f \|= FEATURE_COMPRESSION;	569	f \|= FEATURE_COMPRESSION;
465	#endif	570	#endif
466	#if ENABLE_ROHC	571	#if ENABLE_ROHC
467	f \|= FEATURE_ROHC;	572	f \|= FEATURE_ROHC;
468	#endif	573	#endif
		574	#if ENABLE_BRIDGING
		575	f \|= FEATURE_BRIDGING;
		576	#endif
469	return f;	577	return f;
470	}	578	}
471	};	579	};
472		580
		581	void
473	void config_packet::setup (ptype type, int dst)	582	config_packet::setup (ptype type, int dst)
474	{	583	{
475	prot_major = PROTOCOL_MAJOR;	584	prot_major = PROTOCOL_MAJOR;
476	prot_minor = PROTOCOL_MINOR;	585	prot_minor = PROTOCOL_MINOR;
477	randsize = RAND_SIZE;	586	randsize = RAND_SIZE;
478	hmaclen = HMACLENGTH;
479	flags = 0;	587	flags = 0;
480	challengelen = sizeof (rsachallenge);
481	features = get_features ();	588	features = get_features ();
482		589
		590	strncpy ((char *)serial, conf.serial, sizeof (serial));
		591
483	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	592	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
484	digest_nid = htonl (EVP_MD_type (RSA_HASH));
485	hmac_nid = htonl (EVP_MD_type (DIGEST));	593	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		594	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
486		595
487	len = sizeof (*this) - sizeof (net_packet);	596	len = sizeof (*this) - sizeof (net_packet);
488	set_hdr (type, dst);	597	set_hdr (type, dst);
489	}	598	}
490		599
491	bool config_packet::chk_config () const	600	bool
		601	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
492	{	602	{
493	if (prot_major != PROTOCOL_MAJOR)	603	if (prot_major != PROTOCOL_MAJOR)
494	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	604	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		605	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
495	else if (randsize != RAND_SIZE)	606	else if (randsize != RAND_SIZE)
496	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	607	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
497	else if (hmaclen != HMACLENGTH)	608	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
498	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
499	else if (challengelen != sizeof (rsachallenge))
500	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
501	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	609	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
502	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	610	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
503	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	611	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
504	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
505	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	612	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
506	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	613	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		614	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		615	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		616	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		617	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
507	else	618	else
		619	{
		620	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		621
		622	if (cmp > 0)
		623	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		624	conf->nodename, (const char *)rsi);
		625	else if (cmp == 0)
508	return true;	626	return true;
		627	}
509		628
510	return false;	629	return false;
511	}	630	}
512		631
513	struct auth_req_packet : config_packet	632	struct auth_req_packet : config_packet // UNPROTECTED
514	{	633	{
515	char magic[8];	634	char magic[8];
516	u8 initiate; // false if this is just an automatic reply	635	u8 initiate; // false if this is just an automatic reply
517	u8 protocols; // supported protocols (will be patched on forward)	636	u8 protocols; // supported protocols (will be patched on forward)
518	u8 pad2, pad3;	637	u8 pad2, pad3;
519	rsaid id;	638	auth_encr encr;
520	rsaencrdata encr;
521		639
522	auth_req_packet (int dst, bool initiate_, u8 protocols_)	640	auth_req_packet (int dst, bool initiate_, u8 protocols_)
523	{	641	{
524	config_packet::setup (PT_AUTH_REQ, dst);	642	config_packet::setup (PT_AUTH_REQ, dst);
525	strncpy (magic, MAGIC, 8);	643	memcpy (magic, MAGIC, 8);
526	initiate = !!initiate_;	644	initiate = !!initiate_;
527	protocols = protocols_;	645	protocols = protocols_;
528		646
529	len = sizeof (*this) - sizeof (net_packet);	647	len = sizeof (*this) - sizeof (net_packet);
530	}	648	}
531	};	649	};
532		650
533	struct auth_res_packet : config_packet	651	struct auth_res_packet : vpn_packet // UNPROTECTED
534	{	652	{
535	rsaid id;
536	u8 pad1, pad2, pad3;
537	u8 response_len; // encrypted length
538	rsaresponse response;	653	auth_response response;
539		654
540	auth_res_packet (int dst)	655	auth_res_packet (int dst)
541	{	656	{
542	config_packet::setup (PT_AUTH_RES, dst);	657	set_hdr (PT_AUTH_RES, dst);
543		658
544	len = sizeof (*this) - sizeof (net_packet);	659	len = sizeof (*this) - sizeof (net_packet);
545	}	660	}
546	};	661	};
547		662
…		…
577	};	692	};
578		693
579	/////////////////////////////////////////////////////////////////////////////	694	/////////////////////////////////////////////////////////////////////////////
580		695
581	void	696	void
582	connection::connection_established ()	697	connection::connection_established (const sockinfo &rsi)
583	{	698	{
		699	if (!have_snd_auth \|\| !have_rcv_auth)
		700	return;
		701
		702	si = rsi;
		703	protocol = rsi.prot;
		704
		705	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		706	conf->nodename, (const char *)rsi,
		707	is_direct ? "direct" : "forwarded",
		708	PROTOCOL_MAJOR, prot_minor);
		709
		710	if (::conf.script_node_up)
		711	{
		712	run_script_cb *cb = new run_script_cb;
		713	cb->set<connection, &connection::script_node_up> (this);
		714	run_script_queued (cb, _("node-up command execution failed, continuing."));
		715	}
		716
		717	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		718	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		719
		720	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		721	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		722
		723	oiv.reset ();
		724
		725	// make sure rekeying timeouts are slightly asymmetric
		726	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		727	rekey.start (rekey_interval, rekey_interval);
		728
		729	keepalive.start (::conf.keepalive);
		730
		731	// send queued packets
584	if (ictx && octx)	732	if (ictx && octx)
585	{	733	{
586	connectmode = conf->connectmode;	734	while (tap_packet p = (tap_packet )data_queue.get ())
587
588	// make sure rekeying timeouts are slightly asymmetric
589	rekey.start (NOW + ::conf.rekey
590	+ (conf->id > THISNODE->id ? 10 : 0));
591	keepalive.start (NOW + ::conf.keepalive);
592
593	// send queued packets
594	if (ictx && octx)
595	{	735	{
596	while (tap_packet p = (tap_packet )data_queue.get ())
597	{
598	send_data_packet (p);	736	if (p->len) send_data_packet (p);
599	delete p;	737	delete p;
600	}
601
602	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
603	{
604	send_vpn_packet (p, si, IPTOS_RELIABILITY);
605	delete p;
606	}
607	}	738	}
		739
		740	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		741	{
		742	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
		743	delete p;
		744	}
608	}	745	}
		746
		747	vpn->connection_established (this);
		748	}
		749
		750	void
		751	connection::reset_si ()
		752	{
		753	if (vpn->can_direct (THISNODE, conf))
		754	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
609	else	755	else
610	{	756	{
611	retry_cnt = 0;	757	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
612	establish_connection.start (NOW + 5);	758	protocol = 0;
613	keepalive.stop ();
614	rekey.stop ();
615	}	759	}
616	}
617
618	void
619	connection::reset_si ()
620	{
621	protocol = best_protocol (THISNODE->protocols & conf->protocols);
622
623	// mask out protocols we cannot establish
624	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
625	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
626	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
627		760
628	si.set (conf, protocol);	761	si.set (conf, protocol);
		762
		763	is_direct = si.valid ();
629	}	764	}
630		765
631	// ensure sockinfo is valid, forward if necessary	766	// ensure sockinfo is valid, forward if necessary
632	const sockinfo &	767	const sockinfo &
633	connection::forward_si (const sockinfo &si) const	768	connection::forward_si (const sockinfo &si) const
634	{	769	{
635	if (!si.valid ())	770	if (!si.valid ())
636	{	771	{
637	connection *r = vpn->find_router ();	772	connection *r = vpn->find_router_for (this);
638		773
639	if (r)	774	if (r)
640	{	775	{
641	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	776	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
642	conf->nodename, r->conf->nodename, (const char *)r->si);	777	conf->nodename, r->conf->nodename);
643	return r->si;	778	return r->si;
644	}	779	}
645	else	780	else
646	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	781	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
647	conf->nodename);	782	conf->nodename);
648	}	783	}
649		784
650	return si;	785	return si;
651	}	786	}
…		…
661	connection::send_ping (const sockinfo &si, u8 pong)	796	connection::send_ping (const sockinfo &si, u8 pong)
662	{	797	{
663	ping_packet *pkt = new ping_packet;	798	ping_packet *pkt = new ping_packet;
664		799
665	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	800	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		801
		802	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
666	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	803	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
667		804
668	delete pkt;	805	delete pkt;
669	}	806	}
670		807
…		…
685	void	822	void
686	connection::send_auth_request (const sockinfo &si, bool initiate)	823	connection::send_auth_request (const sockinfo &si, bool initiate)
687	{	824	{
688	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	825	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
689		826
690	rsachallenge chg;	827	generate_auth_data ();
691	rsa_cache.gen (pkt->id, chg);
692	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	828	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
693		829
694	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	830	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
695
696	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	831	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
697		832
698	delete pkt;	833	delete pkt;
699	}	834	}
700		835
701	void	836	void
702	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	837	connection::send_auth_response (const sockinfo &si)
703	{	838	{
704	auth_res_packet *pkt = new auth_res_packet (conf->id);	839	auth_res_packet *pkt = new auth_res_packet (conf->id);
705		840
706	pkt->id = id;	841	auth_hash (rcv_auth, pkt->response.mac);
		842	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
707		843
708	rsa_hash (id, chg, pkt->response);
709
710	pkt->hmac_set (octx);
711
712	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	844	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
713
714	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	845	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
715		846
716	delete pkt;	847	delete pkt;
717	}	848	}
718		849
719	void	850	void
720	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	851	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
721	{	852	{
722	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	853	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
723	conf->id, rid, (const char *)rsi);	854	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		855	conf->protocols);
724		856
725	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	857	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
726		858
727	r->hmac_set (octx);	859	r->hmac_set (octx);
728	send_vpn_packet (r, si);	860	send_vpn_packet (r, si);
729		861
730	delete r;	862	delete r;
731	}	863	}
732		864
733	void	865	inline void
734	connection::establish_connection_cb (time_watcher &w)	866	connection::establish_connection_cb (ev::timer &w, int revents)
735	{	867	{
736	if (!ictx	868	if (!(ictx && octx)
737	&& conf != THISNODE	869	&& conf != THISNODE
738	&& connectmode != conf_node::C_NEVER	870	&& connectmode != conf_node::C_NEVER
739	&& connectmode != conf_node::C_DISABLED	871	&& connectmode != conf_node::C_DISABLED
740	&& NOW > w.at)	872	&& !w.is_active ())
741	{	873	{
742	w.at = TSTAMP_MAX; // first disable this watcher in case of recursion	874	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		875	// and stop trying. should probably be handled by a per-connection expire handler.
		876	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		877	{
		878	reset_connection ();
		879	return;
		880	}
743		881
744	double retry_int = double (retry_cnt & 3	882	last_establish_attempt = ev_now ();
		883
		884	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
745	? (retry_cnt & 3) + 1	885	? (retry_cnt & 3) + 1
746	: 1 << (retry_cnt >> 2));	886	: 1 << (retry_cnt >> 2));
747		887
748	reset_si ();	888	reset_si ();
749		889
750	bool slow = si.prot & PROT_SLOW;	890	bool slow = si.prot & PROT_SLOW;
751		891
752	if (si.prot && !si.host)	892	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		893	{
		894	/TODO/ /* start the timer so we don't recurse endlessly */
		895	w.start (1);
753	vpn->send_connect_request (conf->id);	896	vpn->send_connect_request (this);
		897	}
754	else	898	else
755	{	899	{
		900	if (si.valid ())
		901	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		902	conf->nodename, (const char *)si);
		903
756	const sockinfo &dsi = forward_si (si);	904	const sockinfo &dsi = forward_si (si);
757		905
758	slow = slow \|\| (dsi.prot & PROT_SLOW);	906	slow = slow \|\| (dsi.prot & PROT_SLOW);
759		907
760	if (dsi.valid () && auth_rate_limiter.can (dsi))	908	if (dsi.valid () && auth_rate_limiter.can (dsi))
…		…
764	else	912	else
765	send_ping (dsi, 0);	913	send_ping (dsi, 0);
766	}	914	}
767	}	915	}
768		916
769	retry_int *= slow ? 8. : 0.7;	917	retry_int *= slow ? 8. : 0.9;
770		918
771	if (retry_int < conf->max_retry)	919	if (retry_int < conf->max_retry)
772	retry_cnt++;	920	retry_cnt++;
773	else	921	else
774	retry_int = conf->max_retry;	922	retry_int = conf->max_retry;
775		923
776	w.start (NOW + retry_int);	924	w.start (retry_int);
777	}	925	}
778	}	926	}
779		927
780	void	928	void
781	connection::reset_connection ()	929	connection::reset_connection ()
…		…
784	{	932	{
785	slog (L_INFO, _("%s(%s): connection lost"),	933	slog (L_INFO, _("%s(%s): connection lost"),
786	conf->nodename, (const char *)si);	934	conf->nodename, (const char *)si);
787		935
788	if (::conf.script_node_down)	936	if (::conf.script_node_down)
789	if (!run_script (run_script_cb (this, &connection::script_node_down), false))	937	{
		938	run_script_cb *cb = new run_script_cb;
		939	cb->set<connection, &connection::script_node_down> (this);
790	slog (L_WARN, _("node-down command execution failed, continuing."));	940	run_script_queued (cb, _("node-down command execution failed, continuing."));
		941	}
791	}	942	}
792		943
793	delete ictx; ictx = 0;	944	delete ictx; ictx = 0;
794	delete octx; octx = 0;	945	delete octx; octx = 0;
795	#if ENABLE_DNS
796	dnsv4_reset_connection ();
797	#endif
798		946
799	si.host = 0;	947	si.host = 0;
800		948
		949	have_snd_auth = false;
		950	have_rcv_auth = false;
		951	auth_expire = 0.;
		952
801	last_activity = 0;	953	last_activity = 0.;
		954	//last_si_change = 0.;
802	retry_cnt = 0;	955	retry_cnt = 0;
803		956
804	rekey.stop ();	957	rekey.stop ();
805	keepalive.stop ();	958	keepalive.stop ();
806	establish_connection.stop ();	959	establish_connection.stop ();
…		…
813	send_reset (si);	966	send_reset (si);
814		967
815	reset_connection ();	968	reset_connection ();
816	}	969	}
817		970
818	void	971	// poor-man's rekeying
819	connection::rekey_cb (time_watcher &w)	972	inline void
		973	connection::rekey_cb (ev::timer &w, int revents)
820	{	974	{
821	reset_connection ();	975	reset_connection ();
822	establish_connection ();	976	establish_connection ();
823	}	977	}
824		978
…		…
840	if (oseqno > MAX_SEQNO)	994	if (oseqno > MAX_SEQNO)
841	rekey ();	995	rekey ();
842	}	996	}
843		997
844	void	998	void
		999	connection::post_inject_queue ()
		1000	{
		1001	// force a connection every now and when when packets are sent (max 1/s)
		1002	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		1003	establish_connection.stop ();
		1004
		1005	establish_connection ();
		1006	}
		1007
		1008	void
845	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1009	connection::inject_data_packet (tap_packet *pkt)
846	{	1010	{
847	if (ictx && octx)	1011	if (ictx && octx)
848	send_data_packet (pkt);	1012	send_data_packet (pkt);
849	else	1013	else
850	{	1014	{
851	if (!broadcast)
852	data_queue.put (new tap_packet (*pkt));	1015	data_queue.put (new tap_packet (*pkt));
853		1016	post_inject_queue ();
854	establish_connection ();
855	}	1017	}
856	}	1018	}
857		1019
		1020	void
858	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1021	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
859	{	1022	{
860	if (ictx && octx)	1023	if (ictx && octx)
861	send_vpn_packet (pkt, si, tos);	1024	send_vpn_packet (pkt, si, tos);
862	else	1025	else
863	{	1026	{
864	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1027	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
865		1028	post_inject_queue ();
866	establish_connection ();
867	}	1029	}
868	}	1030	}
869		1031
870	void	1032	void
871	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1033	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
872	{	1034	{
873	last_activity = NOW;	1035	last_activity = ev_now ();
874		1036
875	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1037	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
876	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1038	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1039
		1040	if (connectmode == conf_node::C_DISABLED)
		1041	return;
877		1042
878	switch (pkt->typ ())	1043	switch (pkt->typ ())
879	{	1044	{
880	case vpn_packet::PT_PING:	1045	case vpn_packet::PT_PING:
		1046	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1047
881	// we send pings instead of auth packets after some retries,	1048	// we send pings instead of auth packets after some retries,
882	// so reset the retry counter and establish a connection	1049	// so reset the retry counter and establish a connection
883	// when we receive a ping.	1050	// when we receive a ping.
884	if (!ictx)	1051	if (!ictx)
885	{	1052	{
886	if (auth_rate_limiter.can (rsi))	1053	if (auth_rate_limiter.can (rsi))
887	send_auth_request (rsi, true);	1054	send_auth_request (rsi, true);
888	}	1055	}
889	else	1056	else
		1057	// we would love to change the socket address here, but ping's aren't
		1058	// authenticated, so we best ignore it.
890	send_ping (rsi, 1); // pong	1059	send_ping (rsi, 1); // pong
891		1060
892	break;	1061	break;
893		1062
894	case vpn_packet::PT_PONG:	1063	case vpn_packet::PT_PONG:
		1064	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1065
		1066	// a PONG might mean that the other side doesn't really know
		1067	// about our desire for communication.
		1068	establish_connection ();
895	break;	1069	break;
896		1070
897	case vpn_packet::PT_RESET:	1071	case vpn_packet::PT_RESET:
898	{	1072	{
899	reset_connection ();	1073	reset_connection ();
900		1074
901	config_packet p = (config_packet ) pkt;	1075	config_packet p = (config_packet ) pkt;
902		1076
903	if (!p->chk_config ())	1077	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
904	{
905	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
906	conf->nodename, (const char *)rsi);
907	connectmode = conf_node::C_DISABLED;
908	}
909	else if (connectmode == conf_node::C_ALWAYS)
910	establish_connection ();	1078	establish_connection ();
911	}	1079	}
912	break;	1080	break;
913		1081
914	case vpn_packet::PT_AUTH_REQ:	1082	case vpn_packet::PT_AUTH_REQ:
915	if (auth_rate_limiter.can (rsi))	1083	if (auth_rate_limiter.can (rsi))
916	{	1084	{
917	auth_req_packet p = (auth_req_packet ) pkt;	1085	auth_req_packet p = (auth_req_packet )pkt;
918		1086
919	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1087	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1088	conf->nodename, p->initiate ? "initiate" : "reply",
		1089	p->protocols, p->features);
920		1090
921	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1091	if (memcmp (p->magic, MAGIC, 8))
		1092	{
		1093	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1094	conf->nodename, (const char *)rsi);
		1095	}
		1096	else if (p->chk_config (conf, rsi))
922	{	1097	{
923	if (p->prot_minor != PROTOCOL_MINOR)	1098	if (p->prot_minor != PROTOCOL_MINOR)
924	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1099	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
925	conf->nodename, (const char *)rsi,	1100	conf->nodename, (const char *)rsi,
926	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1101	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
927		1102
928	if (p->initiate)	1103	if (p->initiate)
929	send_auth_request (rsi, false);	1104	send_auth_request (rsi, false);
930		1105
931	rsachallenge k;	1106	auth_data auth;
932		1107
933	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1108	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
934	{	1109	{
935	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1110	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
936	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1111	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
937	break;
938	}	1112	}
939	else	1113	else
940	{	1114	{
941	delete octx;	1115	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
942		1116
943	octx = new crypto_ctx (k, 1);	1117	rcv_auth = auth;
944	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1118	have_rcv_auth = true;
945		1119
		1120	send_auth_response (rsi);
		1121
		1122	if (chg)
		1123	{
946	conf->protocols = p->protocols;	1124	conf->protocols = p->protocols;
947	features = p->features & config_packet::get_features ();	1125	features = p->features & config_packet::get_features ();
948		1126
949	send_auth_response (rsi, p->id, k);
950
951	connection_established ();	1127	connection_established (rsi);
952
953	break;	1128	}
954	}	1129	}
		1130
		1131	break;
955	}	1132	}
956	else
957	slog (L_WARN, _("%s(%s): protocol mismatch"),
958	conf->nodename, (const char *)rsi);
959		1133
960	send_reset (rsi);	1134	send_reset (rsi);
961	}	1135	}
962		1136
963	break;	1137	break;
964		1138
965	case vpn_packet::PT_AUTH_RES:	1139	case vpn_packet::PT_AUTH_RES:
966	{	1140	{
967	auth_res_packet p = (auth_res_packet ) pkt;	1141	auth_res_packet p = (auth_res_packet )pkt;
968		1142
969	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1143	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
970		1144
971	if (p->chk_config ())	1145	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
972	{	1146	{
973	if (p->prot_minor != PROTOCOL_MINOR)
974	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
975	conf->nodename, (const char *)rsi,
976	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
977
978	rsachallenge chg;
979
980	if (!rsa_cache.find (p->id, chg))
981	{
982	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1147	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
983	conf->nodename, (const char *)rsi);	1148	conf->nodename, (const char *)rsi);
984	break;
985	}
986	else
987	{
988	crypto_ctx *cctx = new crypto_ctx (chg, 0);
989
990	if (!p->hmac_chk (cctx))
991	{
992	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
993	"could be an attack, or just corruption or a synchronization error"),
994	conf->nodename, (const char *)rsi);
995	break;
996	}
997	else
998	{
999	rsaresponse h;
1000
1001	rsa_hash (p->id, chg, h);
1002
1003	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1004	{
1005	prot_minor = p->prot_minor;
1006
1007	delete ictx; ictx = cctx;
1008
1009	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1010
1011	si = rsi;
1012	protocol = rsi.prot;
1013
1014	connection_established ();
1015
1016	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1017	conf->nodename, (const char *)rsi,
1018	p->prot_major, p->prot_minor);
1019
1020	if (::conf.script_node_up)
1021	if (!run_script (run_script_cb (this, &connection::script_node_up), false))
1022	slog (L_WARN, _("node-up command execution failed, continuing."));
1023
1024	break;
1025	}
1026	else
1027	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1028	conf->nodename, (const char *)rsi);
1029	}
1030
1031	delete cctx;
1032	}
1033	}	1149	}
		1150	else if (!have_snd_auth)
		1151	{
		1152	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
		1153
		1154	have_snd_auth = true;
		1155	connection_established (rsi);
		1156	}
		1157
		1158	break;
1034	}	1159	}
1035		1160
1036	send_reset (rsi);	1161	send_reset (rsi);
1037	break;	1162	break;
1038		1163
…		…
1048	{	1173	{
1049	vpndata_packet p = (vpndata_packet )pkt;	1174	vpndata_packet p = (vpndata_packet )pkt;
1050		1175
1051	if (!p->hmac_chk (ictx))	1176	if (!p->hmac_chk (ictx))
1052	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1177	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1053	"could be an attack, or just corruption or a synchronization error"),	1178	"could be an attack, or just corruption or a synchronization error."),
1054	conf->nodename, (const char *)rsi);	1179	conf->nodename, (const char *)rsi);
1055	else	1180	else
1056	{	1181	{
1057	u32 seqno;	1182	u32 seqno;
1058	tap_packet *d = p->unpack (this, seqno);	1183	tap_packet *d = p->unpack (this, seqno);
		1184	int seqclass = iseqno.seqno_classify (seqno);
1059		1185
1060	if (iseqno.recv_ok (seqno))	1186	if (seqclass == 0) // ok
1061	{	1187	{
1062	vpn->tap->send (d);	1188	vpn->tap->send (d);
1063		1189
1064	if (si != rsi)	1190	if (si != rsi)
1065	{	1191	{
1066	// fast re-sync on source address changes, useful especially for tcp/ip	1192	// fast re-sync on source address changes, useful especially for tcp/ip
		1193	//if (last_si_change < ev_now () + 5.)
1067	si = rsi;	1194	// {
1068
1069	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1195	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1070	conf->nodename, (const char )si, (const char )rsi);	1196	conf->nodename, (const char )si, (const char )rsi);
		1197
		1198	si = rsi;
		1199
		1200	if (::conf.script_node_change)
		1201	{
		1202	run_script_cb *cb = new run_script_cb;
		1203	cb->set<connection, &connection::script_node_change> (this);
		1204	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1205	}
		1206
		1207	// }
		1208	//else
		1209	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1210	// conf->nodename, (const char )si, (const char )rsi);
1071	}	1211	}
		1212	}
		1213	else if (seqclass == 1) // far history
		1214	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1215	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1216	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1217	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1218	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1219	else if (seqclass == 3) // reset
		1220	{
		1221	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1222	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1223	send_reset (rsi);
1072	}	1224	}
1073		1225
1074	delete d;	1226	delete d;
1075	break;	1227	break;
1076	}	1228	}
…		…
1080	break;	1232	break;
1081		1233
1082	case vpn_packet::PT_CONNECT_REQ:	1234	case vpn_packet::PT_CONNECT_REQ:
1083	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1235	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1084	{	1236	{
1085	connect_req_packet p = (connect_req_packet ) pkt;	1237	connect_req_packet p = (connect_req_packet )pkt;
1086		1238
1087	if (p->id > 0 && p->id <= vpn->conns.size ())	1239	if (p->id > 0 && p->id <= vpn->conns.size ())
1088	{	1240	{
1089	connection *c = vpn->conns[p->id - 1];	1241	connection *c = vpn->conns[p->id - 1];
1090	conf->protocols = p->protocols;	1242	conf->protocols = p->protocols;
1091		1243
1092	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",	1244	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1245	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1246	p->protocols,
1093	conf->id, p->id, c->ictx && c->octx);	1247	c->ictx && c->octx);
1094		1248
1095	if (c->ictx && c->octx)	1249	if (c->ictx && c->octx)
1096	{	1250	{
1097	// send connect_info packets to both sides, in case one is	1251	// send connect_info packets to both sides, in case one is
1098	// behind a nat firewall (or both ;)	1252	// behind a nat firewall (or both ;)
…		…
1121		1275
1122	c->conf->protocols = p->protocols;	1276	c->conf->protocols = p->protocols;
1123	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1277	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1124	p->si.upgrade_protocol (protocol, c->conf);	1278	p->si.upgrade_protocol (protocol, c->conf);
1125		1279
1126	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1280	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1127	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1281	conf->nodename,
		1282	vpn->conns[p->id - 1]->conf->nodename,
		1283	(const char *)p->si,
		1284	p->protocols,
		1285	protocol,
		1286	p->si.supported_protocols (c->conf),
		1287	!c->ictx && !c->octx);
1128		1288
1129	const sockinfo &dsi = forward_si (p->si);	1289	const sockinfo &dsi = forward_si (p->si);
1130		1290
1131	if (dsi.valid ())	1291	if (dsi.valid ())
1132	c->send_auth_request (dsi, true);	1292	c->send_auth_request (dsi, true);
		1293	else
		1294	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1295	vpn->conns[p->id - 1]->conf->nodename,
		1296	(const char *)p->si);
1133	}	1297	}
1134	else	1298	else
1135	slog (L_WARN,	1299	slog (L_WARN,
1136	_("received authenticated connection request from unknown node #%d, config file mismatch?"),	1300	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
1137	p->id);	1301	p->id);
…		…
1143	send_reset (rsi);	1307	send_reset (rsi);
1144	break;	1308	break;
1145	}	1309	}
1146	}	1310	}
1147		1311
1148	void connection::keepalive_cb (time_watcher &w)	1312	inline void
		1313	connection::keepalive_cb (ev::timer &w, int revents)
1149	{	1314	{
1150	if (NOW >= last_activity + ::conf.keepalive + 30)	1315	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1316
		1317	if (when >= 0)
		1318	w.start (when);
		1319	else if (when < -15)
1151	{	1320	{
1152	reset_connection ();	1321	reset_connection ();
1153	establish_connection ();	1322	establish_connection ();
1154	}	1323	}
1155	else if (NOW < last_activity + ::conf.keepalive)
1156	w.start (last_activity + ::conf.keepalive);
1157	else if (conf->connectmode != conf_node::C_ONDEMAND	1324	else if (conf->connectmode != conf_node::C_ONDEMAND
1158	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1325	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1159	{	1326	{
		1327	w.start (3);
1160	send_ping (si);	1328	send_ping (si);
1161	w.start (NOW + 5);
1162	}	1329	}
1163	else if (NOW < last_activity + ::conf.keepalive + 10)	1330	else if (when >= -10)
1164	// hold ondemand connections implicitly a few seconds longer	1331	// hold ondemand connections implicitly a few seconds longer
1165	// should delete octx, though, or something like that ;)	1332	// should delete octx, though, or something like that ;)
1166	w.start (last_activity + ::conf.keepalive + 10);	1333	w.start (when + 10);
1167	else	1334	else
1168	reset_connection ();	1335	reset_connection ();
1169	}	1336	}
1170		1337
		1338	void
1171	void connection::send_connect_request (int id)	1339	connection::send_connect_request (int id)
1172	{	1340	{
1173	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1341	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1174		1342
1175	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1343	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1344	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1345	THISNODE->protocols);
1176	p->hmac_set (octx);	1346	p->hmac_set (octx);
1177	send_vpn_packet (p, si);	1347	send_vpn_packet (p, si);
1178		1348
1179	delete p;	1349	delete p;
1180	}	1350	}
1181		1351
		1352	void
1182	void connection::script_init_env (const char *ext)	1353	connection::script_init_env (const char *ext)
1183	{	1354	{
1184	char *env;	1355	char *env;
1185	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);	1356	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1186	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);	1357	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1187	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,	1358	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1188	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,	1359	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1189	conf->id & 0xff); putenv (env);	1360	conf->id & 0xff); putenv (env);
1190	}	1361	}
1191		1362
		1363	void
1192	void connection::script_init_connect_env ()	1364	connection::script_init_connect_env ()
1193	{	1365	{
1194	vpn->script_init_env ();	1366	vpn->script_init_env ();
1195		1367
1196	char *env;	1368	char *env;
1197	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1369	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1370	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1198	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1371	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1199	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1372	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1200	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1373	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1201	}	1374	}
1202		1375
		1376	inline const char *
1203	const char *connection::script_node_up ()	1377	connection::script_node_up ()
1204	{	1378	{
1205	script_init_connect_env ();	1379	script_init_connect_env ();
1206		1380
1207	putenv ("STATE=up");	1381	putenv ((char *)"STATE=up");
1208		1382
1209	char *filename;	1383	char *filename;
1210	asprintf (&filename,	1384	asprintf (&filename,
1211	"%s/%s",	1385	"%s/%s",
1212	confbase,	1386	confbase,
1213	::conf.script_node_up ? ::conf.script_node_up : "node-up");	1387	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1214		1388
1215	return filename;	1389	return filename;
1216	}	1390	}
1217		1391
1218	const char *connection::script_node_down ()	1392	inline const char *
		1393	connection::script_node_change ()
1219	{	1394	{
1220	script_init_connect_env ();	1395	script_init_connect_env ();
1221		1396
		1397	putenv ((char *)"STATE=change");
		1398
		1399	char *filename;
		1400	asprintf (&filename,
		1401	"%s/%s",
		1402	confbase,
		1403	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1404
		1405	return filename;
		1406	}
		1407
		1408	inline const char *
		1409	connection::script_node_down ()
		1410	{
		1411	script_init_connect_env ();
		1412
1222	putenv ("STATE=down");	1413	putenv ((char *)"STATE=down");
1223		1414
1224	char *filename;	1415	char *filename;
1225	asprintf (&filename,	1416	asprintf (&filename,
1226	"%s/%s",	1417	"%s/%s",
1227	confbase,	1418	confbase,
…		…
1229		1420
1230	return filename;	1421	return filename;
1231	}	1422	}
1232		1423
1233	connection::connection (struct vpn vpn, conf_node conf)	1424	connection::connection (struct vpn vpn, conf_node conf)
1234	: vpn(vpn), conf(conf)	1425	: vpn(vpn), conf(conf),
1235	, rekey (this, &connection::rekey_cb)
1236	, keepalive (this, &connection::keepalive_cb)
1237	, establish_connection (this, &connection::establish_connection_cb)
1238	#if ENABLE_DNS	1426	#if ENABLE_DNS
1239	, dns (0)	1427	dns (0),
1240	#endif	1428	#endif
		1429	data_queue(conf->max_ttl, conf->max_queue + 1),
		1430	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1241	{	1431	{
		1432	rekey .set<connection, &connection::rekey_cb > (this);
		1433	keepalive .set<connection, &connection::keepalive_cb > (this);
		1434	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1435
		1436	last_establish_attempt = 0.;
1242	octx = ictx = 0;	1437	octx = ictx = 0;
1243	retry_cnt = 0;
1244		1438
1245	if (!conf->protocols) // make sure some protocol is enabled	1439	connectmode = conf->connectmode;
1246	conf->protocols = PROT_UDPv4;
1247		1440
1248	connectmode = conf_node::C_ALWAYS; // initial setting	1441	// queue a dummy packet to force an initial connection attempt
		1442	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1443	vpn_queue.put (new net_packet);
		1444
1249	reset_connection ();	1445	reset_connection ();
1250	}	1446	}
1251		1447
1252	connection::~connection ()	1448	connection::~connection ()
1253	{	1449	{
1254	shutdown ();	1450	shutdown ();
1255	}	1451	}
1256		1452
		1453	void
1257	void connection_init ()	1454	connection_init ()
1258	{	1455	{
1259	auth_rate_limiter.clear ();	1456	auth_rate_limiter.clear ();
1260	reset_rate_limiter.clear ();	1457	reset_rate_limiter.clear ();
1261	}	1458	}
1262		1459

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Comparing gvpe/src/connection.C (file contents): Revision 1.57 by pcg, Thu Jul 7 14:41:51 2005 UTC vs. Revision 1.103 by root, Thu Jul 18 17:35:10 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.57 by pcg, Thu Jul 7 14:41:51 2005 UTC vs.
Revision 1.103 by root, Thu Jul 18 17:35:10 2013 UTC