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

Comparing gvpe/src/connection.C (file contents):
Revision 1.47 by pcg, Mon Mar 7 01:31:26 2005 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 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. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <cassert>
25
26	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
27		37
28	#include <openssl/rand.h>	38	#include <openssl/rand.h>
29	#include <openssl/evp.h>	39	#include <openssl/evp.h>
30	#include <openssl/rsa.h>	40	#include <openssl/rsa.h>
31	#include <openssl/err.h>	41	#include <openssl/err.h>
32
33	#include "gettext.h"
34		42
35	#include "conf.h"	43	#include "conf.h"
36	#include "slog.h"	44	#include "slog.h"
37	#include "device.h"	45	#include "device.h"
38	#include "vpn.h"	46	#include "vpn.h"
39	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
40		49
41	#include "netcompat.h"	50	#include "netcompat.h"
42		51
43	#if !HAVE_RAND_PSEUDO_BYTES
44	# define RAND_pseudo_bytes RAND_bytes
45	#endif
46
47	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	52	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
48		53
49	#define ULTRA_FAST 1	54	#define ULTRA_FAST 1
50	#define HLOG 15	55	#define HLOG 15
51	#include "lzf/lzf.h"	56	#include "lzf/lzf.h"
52	#include "lzf/lzf_c.c"	57	#include "lzf/lzf_c.c"
53	#include "lzf/lzf_d.c"	58	#include "lzf/lzf_d.c"
54		59
		60	//////////////////////////////////////////////////////////////////////////////
		61
		62	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		63	static ev::child rs_child_ev;
		64
		65	namespace
		66	{
		67	void // c++ requires external linkage here, apparently :(
		68	rs_child_cb (ev::child &w, int revents)
		69	{
		70	w.stop ();
		71
		72	if (rs_queue.empty ())
		73	return;
		74
		75	pid_t pid = run_script (*rs_queue.front ().first, false);
		76	if (pid)
		77	{
		78	w.set (pid);
		79	w.start ();
		80	}
		81	else
		82	slog (L_WARN, rs_queue.front ().second);
		83
		84	delete rs_queue.front ().first;
		85	rs_queue.pop ();
		86	}
		87	};
		88
		89	// despite the fancy name, this is quite a hack
		90	static void
		91	run_script_queued (run_script_cb cb, const char warnmsg)
		92	{
		93	rs_queue.push (std::make_pair (cb, warnmsg));
		94
		95	if (!rs_child_ev.is_active ())
		96	{
		97	rs_child_ev.set<rs_child_cb> ();
		98	rs_child_ev ();
		99	}
		100	}
		101
		102	//////////////////////////////////////////////////////////////////////////////
		103
55	struct crypto_ctx	104	struct crypto_ctx
56	{	105	{
57	EVP_CIPHER_CTX cctx;	106	EVP_CIPHER_CTX cctx;
58	HMAC_CTX hctx;	107	HMAC_CTX hctx;
59		108
60	crypto_ctx (const rsachallenge &challenge, int enc);	109	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
61	~crypto_ctx ();	110	~crypto_ctx ();
62	};	111	};
63		112
64	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	113	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
65	{	114	{
		115	ecdh_key s;
		116
		117	curve25519_combine (a, b, s);
		118
		119	{
		120	u8 mac_key[MAC_KEYSIZE];
		121	static const unsigned char mac_info[] = "gvpe mac key";
		122
		123	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		124	kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		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 (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		140	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		141	kdf.extract (s, sizeof (s));
		142	kdf.extract_done (HKDF_PRF_HASH ());
		143	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		144
66	EVP_CIPHER_CTX_init (&cctx);	145	EVP_CIPHER_CTX_init (&cctx);
67	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	146	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
68	HMAC_CTX_init (&hctx);	147	}
69	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
70	}	148	}
71		149
72	crypto_ctx::~crypto_ctx ()	150	crypto_ctx::~crypto_ctx ()
73	{	151	{
74	require (EVP_CIPHER_CTX_cleanup (&cctx));	152	require (EVP_CIPHER_CTX_cleanup (&cctx));
75	HMAC_CTX_cleanup (&hctx);	153	HMAC_CTX_cleanup (&hctx);
76	}	154	}
77		155
		156	static inline void
		157	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		158	{
		159	if (RSA_public_encrypt (sizeof (auth.rsa),
		160	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		161	key, RSA_PKCS1_OAEP_PADDING) < 0)
		162	fatal ("RSA_public_encrypt error");
		163
		164	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		165	}
		166
		167	static inline bool
		168	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		169	{
		170	u8 rsa_decrypt[RSA_KEYLEN];
		171
		172	if (RSA_private_decrypt (sizeof (encr.rsa),
		173	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		174	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		175	return 0;
		176
		177	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		178	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		179
		180	return 1;
		181	}
		182
78	static void	183	static void
79	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	184	auth_hash (const auth_data &auth, auth_mac &mac)
80	{	185	{
81	EVP_MD_CTX ctx;	186	HMAC_CTX ctx;
82		187
83	EVP_MD_CTX_init (&ctx);	188	HMAC_CTX_init (&ctx);
84	require (EVP_DigestInit (&ctx, RSA_HASH));	189	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
85	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));	190	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
86	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
87	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	191	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
88	EVP_MD_CTX_cleanup (&ctx);	192	HMAC_CTX_cleanup (&ctx);
89	}	193	}
90		194
91	struct rsa_entry {	195	void
92	tstamp expire;	196	connection::generate_auth_data ()
93	rsaid id;
94	rsachallenge chg;
95	};
96
97	struct rsa_cache : list<rsa_entry>
98	{	197	{
99	void cleaner_cb (time_watcher &w); time_watcher cleaner;	198	if (auth_expire < ev_now ())
100
101	bool find (const rsaid &id, rsachallenge &chg)
102	{
103	for (iterator i = begin (); i != end (); ++i)
104	{
105	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)
106	{
107	memcpy (&chg, &i->chg, sizeof chg);
108
109	erase (i);
110	return true;
111	}
112	}
113
114	if (cleaner.at < NOW)
115	cleaner.start (NOW + RSA_TTL);
116
117	return false;
118	}
119
120	void gen (rsaid &id, rsachallenge &chg)
121	{
122	rsa_entry e;
123
124	RAND_bytes ((unsigned char *)&id, sizeof id);
125	RAND_bytes ((unsigned char *)&chg, sizeof chg);
126
127	e.expire = NOW + RSA_TTL;
128	e.id = id;
129	memcpy (&e.chg, &chg, sizeof chg);
130
131	push_back (e);
132
133	if (cleaner.at < NOW)
134	cleaner.start (NOW + RSA_TTL);
135	}
136
137	rsa_cache ()
138	: cleaner (this, &rsa_cache::cleaner_cb)
139	{ }	199	{
		200	// request data
		201	RAND_bytes ((unsigned char *)&snd_auth.rsa, sizeof snd_auth.rsa);
		202	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
		203	auth_hash (snd_auth, snd_auth_mac);
140		204
141	} rsa_cache;	205	// eventual response data
142		206	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
143	void rsa_cache::cleaner_cb (time_watcher &w)
144	{
145	if (!empty ())
146	{	207	}
147	w.start (NOW + RSA_TTL);
148		208
149	for (iterator i = begin (); i != end (); )	209	// every use prolongs the expiry
150	if (i->expire <= NOW)	210	auth_expire = ev_now () + AUTH_TTL;
151	i = erase (i);
152	else
153	++i;
154	}
155	}	211	}
156		212
157	//////////////////////////////////////////////////////////////////////////////	213	//////////////////////////////////////////////////////////////////////////////
158		214
159	void pkt_queue::put (net_packet *p)	215	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		216	: max_ttl (max_ttl), max_queue (max_queue)
160	{	217	{
161	if (queue[i])	218	queue = new pkt [max_queue];
162	{
163	delete queue[i];
164	j = (j + 1) % QUEUEDEPTH;
165	}
166		219
167	queue[i] = p;
168
169	i = (i + 1) % QUEUEDEPTH;
170	}
171
172	net_packet *pkt_queue::get ()
173	{
174	net_packet *p = queue[j];
175
176	if (p)
177	{
178	queue[j] = 0;
179	j = (j + 1) % QUEUEDEPTH;
180	}
181
182	return p;
183	}
184
185	pkt_queue::pkt_queue ()
186	{
187	memset (queue, 0, sizeof (queue));
188	i = 0;	220	i = 0;
189	j = 0;	221	j = 0;
		222
		223	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
190	}	224	}
191		225
192	pkt_queue::~pkt_queue ()	226	pkt_queue::~pkt_queue ()
193	{	227	{
194	for (i = QUEUEDEPTH; --i > 0; )	228	while (net_packet *p = get ())
		229	delete p;
		230
195	delete queue[i];	231	delete [] queue;
196	}	232	}
197		233
		234	void
		235	pkt_queue::expire_cb (ev::timer &w, int revents)
		236	{
		237	ev_tstamp expire = ev_now () - max_ttl;
		238
		239	for (;;)
		240	{
		241	if (empty ())
		242	break;
		243
		244	double diff = queue[j].tstamp - expire;
		245
		246	if (diff >= 0.)
		247	{
		248	w.start (diff > 0.5 ? diff : 0.5);
		249	break;
		250	}
		251
		252	delete get ();
		253	}
		254	}
		255
		256	void
		257	pkt_queue::put (net_packet *p)
		258	{
		259	ev_tstamp now = ev_now ();
		260
		261	// start expiry timer
		262	if (empty ())
		263	expire.start (max_ttl);
		264
		265	int ni = i + 1 == max_queue ? 0 : i + 1;
		266
		267	if (ni == j)
		268	delete get ();
		269
		270	queue[i].pkt = p;
		271	queue[i].tstamp = now;
		272
		273	i = ni;
		274	}
		275
		276	net_packet *
		277	pkt_queue::get ()
		278	{
		279	if (empty ())
		280	return 0;
		281
		282	net_packet *p = queue[j].pkt;
		283	queue[j].pkt = 0;
		284
		285	j = j + 1 == max_queue ? 0 : j + 1;
		286
		287	return p;
		288	}
		289
198	struct net_rateinfo {	290	struct net_rateinfo
		291	{
199	u32 host;	292	u32 host;
200	double pcnt, diff;	293	double pcnt, diff;
201	tstamp last;	294	tstamp last;
202	};	295	};
203		296
213		306
214	bool can (const sockinfo &si) { return can((u32)si.host); }	307	bool can (const sockinfo &si) { return can((u32)si.host); }
215	bool can (u32 host);	308	bool can (u32 host);
216	};	309	};
217		310
218	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	311	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
219		312
		313	bool
220	bool net_rate_limiter::can (u32 host)	314	net_rate_limiter::can (u32 host)
221	{	315	{
222	iterator i;	316	iterator i;
223		317
224	for (i = begin (); i != end (); )	318	for (i = begin (); i != end (); )
225	if (i->host == host)	319	if (i->host == host)
226	break;	320	break;
227	else if (i->last < NOW - NRL_EXPIRE)	321	else if (i->last < ev_now () - NRL_EXPIRE)
228	i = erase (i);	322	i = erase (i);
229	else	323	else
230	i++;	324	i++;
231		325
232	if (i == end ())	326	if (i == end ())
…		…
234	net_rateinfo ri;	328	net_rateinfo ri;
235		329
236	ri.host = host;	330	ri.host = host;
237	ri.pcnt = 1.;	331	ri.pcnt = 1.;
238	ri.diff = NRL_MAXDIF;	332	ri.diff = NRL_MAXDIF;
239	ri.last = NOW;	333	ri.last = ev_now ();
240		334
241	push_front (ri);	335	push_front (ri);
242		336
243	return true;	337	return true;
244	}	338	}
…		…
246	{	340	{
247	net_rateinfo ri (*i);	341	net_rateinfo ri (*i);
248	erase (i);	342	erase (i);
249		343
250	ri.pcnt = ri.pcnt * NRL_ALPHA;	344	ri.pcnt = ri.pcnt * NRL_ALPHA;
251	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	345	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
252		346
253	ri.last = NOW;	347	ri.last = ev_now ();
254		348
255	double dif = ri.diff / ri.pcnt;	349	double dif = ri.diff / ri.pcnt;
256		350
257	bool send = dif > NRL_CUTOFF;	351	bool send = dif > NRL_CUTOFF;
258		352
…		…
272		366
273	/////////////////////////////////////////////////////////////////////////////	367	/////////////////////////////////////////////////////////////////////////////
274		368
275	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	369	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
276		370
		371	void
277	void hmac_packet::hmac_gen (crypto_ctx *ctx)	372	hmac_packet::hmac_gen (crypto_ctx *ctx)
278	{	373	{
279	unsigned int xlen;	374	unsigned int xlen;
280		375
281	HMAC_CTX *hctx = &ctx->hctx;	376	HMAC_CTX *hctx = &ctx->hctx;
282		377
283	HMAC_Init_ex (hctx, 0, 0, 0, 0);	378	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
284	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	379	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
285	len - sizeof (hmac_packet));	380	len - sizeof (hmac_packet)));
286	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	381	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
287	}	382	}
288		383
289	void	384	void
290	hmac_packet::hmac_set (crypto_ctx *ctx)	385	hmac_packet::hmac_set (crypto_ctx *ctx)
291	{	386	{
…		…
300	hmac_gen (ctx);	395	hmac_gen (ctx);
301		396
302	return !memcmp (hmac, hmac_digest, HMACLENGTH);	397	return !memcmp (hmac, hmac_digest, HMACLENGTH);
303	}	398	}
304		399
		400	void
305	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	401	vpn_packet::set_hdr (ptype type_, unsigned int dst)
306	{	402	{
307	type = type_;	403	type = type_;
308		404
309	int src = THISNODE->id;	405	int src = THISNODE->id;
310		406
…		…
315		411
316	#define MAXVPNDATA (MAX_MTU - 6 - 6)	412	#define MAXVPNDATA (MAX_MTU - 6 - 6)
317	#define DATAHDR (sizeof (u32) + RAND_SIZE)	413	#define DATAHDR (sizeof (u32) + RAND_SIZE)
318		414
319	struct vpndata_packet : vpn_packet	415	struct vpndata_packet : vpn_packet
		416	{
		417	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		418
		419	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		420	tap_packet unpack (connection conn, u32 &seqno);
		421
		422	private:
		423	const u32 data_hdr_size () const
320	{	424	{
321	u8 data[MAXVPNDATA + DATAHDR]; // seqno
322
323	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
324	tap_packet unpack (connection conn, u32 &seqno);
325	private:
326
327	const u32 data_hdr_size () const
328	{
329	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	425	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
330	}
331	};	426	}
		427	};
332		428
333	void	429	void
334	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	430	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
335	{	431	{
336	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	432	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
338	ptype type = PT_DATA_UNCOMPRESSED;	434	ptype type = PT_DATA_UNCOMPRESSED;
339		435
340	#if ENABLE_COMPRESSION	436	#if ENABLE_COMPRESSION
341	u8 cdata[MAX_MTU];	437	u8 cdata[MAX_MTU];
342		438
343	if (conn->features & ENABLE_COMPRESSION)	439	if (conn->features & FEATURE_COMPRESSION)
344	{	440	{
345	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	441	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
346		442
347	if (cl)	443	if (cl)
348	{	444	{
…		…
354	d[1] = cl;	450	d[1] = cl;
355	}	451	}
356	}	452	}
357	#endif	453	#endif
358		454
359	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	455	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
360		456
361	struct {	457	struct {
362	#if RAND_SIZE	458	#if RAND_SIZE
363	u8 rnd[RAND_SIZE];	459	u8 rnd[RAND_SIZE];
364	#endif	460	#endif
365	u32 seqno;	461	u32 seqno;
366	} datahdr;	462	} datahdr;
367		463
368	datahdr.seqno = ntohl (seqno);	464	datahdr.seqno = ntohl (seqno);
369	#if RAND_SIZE	465	#if RAND_SIZE
370	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	466	RAND_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);
371	#endif	467	#endif
372		468
373	require (EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
374	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
375	(unsigned char *) &datahdr, DATAHDR));	471	(unsigned char *) &datahdr, DATAHDR));
…		…
397	int outl = 0, outl2;	493	int outl = 0, outl2;
398	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
399	u8 *d;	495	u8 *d;
400	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
401		497
402	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
403		499
404	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
405	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
406		502
407	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
…		…
449	}	545	}
450	};	546	};
451		547
452	struct config_packet : vpn_packet	548	struct config_packet : vpn_packet
453	{	549	{
454	// actually, hmaclen cannot be checked because the hmac
455	// field comes before this data, so peers with other
456	// hmacs simply will not work.
457	u8 prot_major, prot_minor, randsize, hmaclen;	550	u8 prot_major, prot_minor, randsize;
458	u8 flags, challengelen, features, pad3;	551	u8 flags, features, pad6, pad7, pad8;
459	u32 cipher_nid, digest_nid, hmac_nid;	552	u32 cipher_nid, mac_nid, auth_nid;
460		553
461	void setup (ptype type, int dst);	554	void setup (ptype type, int dst);
462	bool chk_config () const;	555	bool chk_config () const;
463		556
464	static u8 get_features ()	557	static u8 get_features ()
…		…
468	f \|= FEATURE_COMPRESSION;	561	f \|= FEATURE_COMPRESSION;
469	#endif	562	#endif
470	#if ENABLE_ROHC	563	#if ENABLE_ROHC
471	f \|= FEATURE_ROHC;	564	f \|= FEATURE_ROHC;
472	#endif	565	#endif
		566	#if ENABLE_BRIDGING
		567	f \|= FEATURE_BRIDGING;
		568	#endif
473	return f;	569	return f;
474	}	570	}
475	};	571	};
476		572
		573	void
477	void config_packet::setup (ptype type, int dst)	574	config_packet::setup (ptype type, int dst)
478	{	575	{
479	prot_major = PROTOCOL_MAJOR;	576	prot_major = PROTOCOL_MAJOR;
480	prot_minor = PROTOCOL_MINOR;	577	prot_minor = PROTOCOL_MINOR;
481	randsize = RAND_SIZE;	578	randsize = RAND_SIZE;
482	hmaclen = HMACLENGTH;	579	flags = 0;
483	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
484	challengelen = sizeof (rsachallenge);
485	features = get_features ();	580	features = get_features ();
486		581
487	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	582	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
488	digest_nid = htonl (EVP_MD_type (RSA_HASH));
489	hmac_nid = htonl (EVP_MD_type (DIGEST));	583	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		584	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
490		585
491	len = sizeof (*this) - sizeof (net_packet);	586	len = sizeof (*this) - sizeof (net_packet);
492	set_hdr (type, dst);	587	set_hdr (type, dst);
493	}	588	}
494		589
		590	bool
495	bool config_packet::chk_config () const	591	config_packet::chk_config () const
496	{	592	{
497	if (prot_major != PROTOCOL_MAJOR)	593	if (prot_major != PROTOCOL_MAJOR)
498	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	594	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
499	else if (randsize != RAND_SIZE)	595	else if (randsize != RAND_SIZE)
500	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	596	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
501	else if (hmaclen != HMACLENGTH)
502	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
503	#if 0 // this implementation should handle all flag settings
504	else if (flags != curflags ())
505	slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ());
506	#endif
507	else if (challengelen != sizeof (rsachallenge))
508	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
509	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	597	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
510	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	598	slog (L_WARN, _("cipher algo mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
511	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
512	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
513	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	599	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
514	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	600	slog (L_WARN, _("mac algo mismatch (remote %x <=> local %x)"), ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		601	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		602	slog (L_WARN, _("auth algo mismatch (remote %x <=> local %x)"), ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
515	else	603	else
516	return true;	604	return true;
517		605
518	return false;	606	return false;
519	}	607	}
520		608
521	struct auth_req_packet : config_packet	609	struct auth_req_packet : config_packet // UNPROTECTED
522	{	610	{
523	char magic[8];	611	char magic[8];
524	u8 initiate; // false if this is just an automatic reply	612	u8 initiate; // false if this is just an automatic reply
525	u8 protocols; // supported protocols (will be patched on forward)	613	u8 protocols; // supported protocols (will be patched on forward)
526	u8 pad2, pad3;	614	u8 pad2, pad3;
527	rsaid id;	615	auth_encr encr;
528	rsaencrdata encr;
529		616
530	auth_req_packet (int dst, bool initiate_, u8 protocols_)	617	auth_req_packet (int dst, bool initiate_, u8 protocols_)
531	{	618	{
532	config_packet::setup (PT_AUTH_REQ, dst);	619	config_packet::setup (PT_AUTH_REQ, dst);
533	strncpy (magic, MAGIC, 8);	620	memcpy (magic, MAGIC, 8);
534	initiate = !!initiate_;	621	initiate = !!initiate_;
535	protocols = protocols_;	622	protocols = protocols_;
536		623
537	len = sizeof (*this) - sizeof (net_packet);	624	len = sizeof (*this) - sizeof (net_packet);
538	}	625	}
539	};	626	};
540		627
541	struct auth_res_packet : config_packet	628	struct auth_res_packet : config_packet // UNPROTECTED
542	{	629	{
543	rsaid id;
544	u8 pad1, pad2, pad3;
545	u8 response_len; // encrypted length
546	rsaresponse response;	630	auth_response response;
547		631
548	auth_res_packet (int dst)	632	auth_res_packet (int dst)
549	{	633	{
550	config_packet::setup (PT_AUTH_RES, dst);	634	config_packet::setup (PT_AUTH_RES, dst);
551		635
…		…
585	};	669	};
586		670
587	/////////////////////////////////////////////////////////////////////////////	671	/////////////////////////////////////////////////////////////////////////////
588		672
589	void	673	void
590	connection::connection_established ()	674	connection::connection_established (const sockinfo &rsi)
591	{	675	{
		676	if (!have_snd_auth \|\| !have_rcv_auth)
		677	return;
		678
		679	si = rsi;
		680	protocol = rsi.prot;
		681
		682	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		683	conf->nodename, (const char *)rsi,
		684	is_direct ? "direct" : "forwarded",
		685	PROTOCOL_MAJOR, prot_minor);
		686
		687	if (::conf.script_node_up)
		688	{
		689	run_script_cb *cb = new run_script_cb;
		690	cb->set<connection, &connection::script_node_up> (this);
		691	run_script_queued (cb, _("node-up command execution failed, continuing."));
		692	}
		693
		694	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		695	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		696
		697	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		698	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		699
592	if (ictx && octx)	700	if (ictx && octx)
593	{	701	{
594	connectmode = conf->connectmode;
595
596	// make sure rekeying timeouts are slightly asymmetric	702	// make sure rekeying timeouts are slightly asymmetric
597	rekey.start (NOW + ::conf.rekey	703	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
598	+ (conf->id > THISNODE->id ? 10 : 0));	704	rekey.start (rekey_interval, rekey_interval);
		705
599	keepalive.start (NOW + ::conf.keepalive);	706	keepalive.start (::conf.keepalive);
600		707
601	// send queued packets	708	// send queued packets
602	if (ictx && octx)	709	if (ictx && octx)
603	{	710	{
604	while (tap_packet p = (tap_packet )data_queue.get ())	711	while (tap_packet p = (tap_packet )data_queue.get ())
605	{	712	{
606	send_data_packet (p);	713	if (p->len) send_data_packet (p);
607	delete p;	714	delete p;
608	}	715	}
609		716
610	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	717	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
611	{	718	{
612	send_vpn_packet (p, si, IPTOS_RELIABILITY);	719	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
613	delete p;	720	delete p;
614	}	721	}
615	}	722	}
		723
		724	vpn->connection_established (this);
616	}	725	}
		726	#if 0
617	else	727	else
618	{	728	{
619	retry_cnt = 0;	729	retry_cnt = 0;
620	establish_connection.start (NOW + 5);	730	establish_connection.start (5);
621	keepalive.stop ();	731	keepalive.stop ();
622	rekey.stop ();	732	rekey.stop ();
623	}	733	}
		734	#endif
624	}	735	}
625		736
626	void	737	void
627	connection::reset_si ()	738	connection::reset_si ()
628	{	739	{
		740	if (vpn->can_direct (THISNODE, conf))
629	protocol = best_protocol (THISNODE->protocols & conf->protocols);	741	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
630		742	else
631	// mask out protocols we cannot establish	743	{
632	if (!conf->udp_port) protocol &= ~PROT_UDPv4;	744	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
633	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;	745	protocol = 0;
634	if (!conf->dns_port) protocol &= ~PROT_DNSv4;	746	}
635		747
636	si.set (conf, protocol);	748	si.set (conf, protocol);
		749
		750	is_direct = si.valid ();
637	}	751	}
638		752
639	// ensure sockinfo is valid, forward if necessary	753	// ensure sockinfo is valid, forward if necessary
640	const sockinfo &	754	const sockinfo &
641	connection::forward_si (const sockinfo &si) const	755	connection::forward_si (const sockinfo &si) const
642	{	756	{
643	if (!si.valid ())	757	if (!si.valid ())
644	{	758	{
645	connection *r = vpn->find_router ();	759	connection *r = vpn->find_router_for (this);
646		760
647	if (r)	761	if (r)
648	{	762	{
649	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	763	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
650	conf->nodename, r->conf->nodename, (const char *)r->si);	764	conf->nodename, r->conf->nodename);
651	return r->si;	765	return r->si;
652	}	766	}
653	else	767	else
654	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	768	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
655	conf->nodename);	769	conf->nodename);
656	}	770	}
657		771
658	return si;	772	return si;
659	}	773	}
…		…
669	connection::send_ping (const sockinfo &si, u8 pong)	783	connection::send_ping (const sockinfo &si, u8 pong)
670	{	784	{
671	ping_packet *pkt = new ping_packet;	785	ping_packet *pkt = new ping_packet;
672		786
673	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	787	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		788
		789	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
674	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	790	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
675		791
676	delete pkt;	792	delete pkt;
677	}	793	}
678		794
…		…
693	void	809	void
694	connection::send_auth_request (const sockinfo &si, bool initiate)	810	connection::send_auth_request (const sockinfo &si, bool initiate)
695	{	811	{
696	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	812	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
697		813
698	rsachallenge chg;	814	generate_auth_data ();
699	rsa_cache.gen (pkt->id, chg);
700	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	815	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
701		816
702	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	817	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
703
704	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	818	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
705		819
706	delete pkt;	820	delete pkt;
707	}	821	}
708		822
709	void	823	void
710	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	824	connection::send_auth_response (const sockinfo &si)
711	{	825	{
712	auth_res_packet *pkt = new auth_res_packet (conf->id);	826	auth_res_packet *pkt = new auth_res_packet (conf->id);
713		827
714	pkt->id = id;	828	auth_hash (rcv_auth, pkt->response.mac);
		829	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
715		830
716	rsa_hash (id, chg, pkt->response);
717
718	pkt->hmac_set (octx);
719
720	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	831	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
721
722	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	832	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
723		833
724	delete pkt;	834	delete pkt;
725	}	835	}
726		836
727	void	837	void
728	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	838	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
729	{	839	{
730	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	840	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
731	conf->id, rid, (const char *)rsi);	841	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		842	conf->protocols);
732		843
733	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	844	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
734		845
735	r->hmac_set (octx);	846	r->hmac_set (octx);
736	send_vpn_packet (r, si);	847	send_vpn_packet (r, si);
737		848
738	delete r;	849	delete r;
739	}	850	}
740		851
741	void	852	inline void
742	connection::establish_connection_cb (time_watcher &w)	853	connection::establish_connection_cb (ev::timer &w, int revents)
743	{	854	{
744	if (!ictx	855	if (!(ictx && octx)
745	&& conf != THISNODE	856	&& conf != THISNODE
746	&& connectmode != conf_node::C_NEVER	857	&& connectmode != conf_node::C_NEVER
747	&& connectmode != conf_node::C_DISABLED	858	&& connectmode != conf_node::C_DISABLED
748	&& NOW > w.at)	859	&& !w.is_active ())
749	{	860	{
750	w.at = TSTAMP_MAX; // first disable this watcher in case of recursion	861	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		862	// and stop trying. should probably be handled by a per-connection expire handler.
		863	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		864	{
		865	reset_connection ();
		866	return;
		867	}
751		868
752	double retry_int = double (retry_cnt & 3	869	last_establish_attempt = ev_now ();
		870
		871	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
753	? (retry_cnt & 3) + 1	872	? (retry_cnt & 3) + 1
754	: 1 << (retry_cnt >> 2));	873	: 1 << (retry_cnt >> 2));
755		874
756	reset_si ();	875	reset_si ();
757		876
758	bool slow = si.prot & PROT_SLOW;	877	bool slow = si.prot & PROT_SLOW;
759		878
760	if (si.prot && !si.host)	879	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		880	{
		881	/TODO/ /* start the timer so we don't recurse endlessly */
		882	w.start (1);
761	vpn->send_connect_request (conf->id);	883	vpn->send_connect_request (this);
		884	}
762	else	885	else
763	{	886	{
		887	if (si.valid ())
		888	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		889	conf->nodename, (const char *)si);
		890
764	const sockinfo &dsi = forward_si (si);	891	const sockinfo &dsi = forward_si (si);
765		892
766	slow = slow \|\| (dsi.prot & PROT_SLOW);	893	slow = slow \|\| (dsi.prot & PROT_SLOW);
767		894
768	if (dsi.valid () && auth_rate_limiter.can (dsi))	895	if (dsi.valid () && auth_rate_limiter.can (dsi))
…		…
772	else	899	else
773	send_ping (dsi, 0);	900	send_ping (dsi, 0);
774	}	901	}
775	}	902	}
776		903
777	retry_int *= slow ? 3. : 0.7;	904	retry_int *= slow ? 8. : 0.9;
778		905
779	if (retry_int < conf->max_retry)	906	if (retry_int < conf->max_retry)
780	retry_cnt++;	907	retry_cnt++;
781	else	908	else
782	retry_int = conf->max_retry;	909	retry_int = conf->max_retry;
783		910
784	w.start (NOW + retry_int);	911	w.start (retry_int);
785	}	912	}
786	}	913	}
787		914
788	void	915	void
789	connection::reset_connection ()	916	connection::reset_connection ()
…		…
792	{	919	{
793	slog (L_INFO, _("%s(%s): connection lost"),	920	slog (L_INFO, _("%s(%s): connection lost"),
794	conf->nodename, (const char *)si);	921	conf->nodename, (const char *)si);
795		922
796	if (::conf.script_node_down)	923	if (::conf.script_node_down)
797	run_script (run_script_cb (this, &connection::script_node_down), false);	924	{
		925	run_script_cb *cb = new run_script_cb;
		926	cb->set<connection, &connection::script_node_down> (this);
		927	run_script_queued (cb, _("node-down command execution failed, continuing."));
		928	}
798	}	929	}
799		930
800	delete ictx; ictx = 0;	931	delete ictx; ictx = 0;
801	delete octx; octx = 0;	932	delete octx; octx = 0;
802	#if ENABLE_DNS
803	dnsv4_reset_connection ();
804	#endif
805		933
806	si.host = 0;	934	si.host = 0;
807		935
		936	have_snd_auth = false;
		937	have_rcv_auth = false;
		938	auth_expire = 0.;
		939
808	last_activity = 0;	940	last_activity = 0.;
		941	//last_si_change = 0.;
809	retry_cnt = 0;	942	retry_cnt = 0;
810		943
811	rekey.stop ();	944	rekey.stop ();
812	keepalive.stop ();	945	keepalive.stop ();
813	establish_connection.stop ();	946	establish_connection.stop ();
…		…
820	send_reset (si);	953	send_reset (si);
821		954
822	reset_connection ();	955	reset_connection ();
823	}	956	}
824		957
825	void	958	// poor-man's rekeying
826	connection::rekey_cb (time_watcher &w)	959	inline void
		960	connection::rekey_cb (ev::timer &w, int revents)
827	{	961	{
828	reset_connection ();	962	reset_connection ();
829	establish_connection ();	963	establish_connection ();
830	}	964	}
831		965
…		…
847	if (oseqno > MAX_SEQNO)	981	if (oseqno > MAX_SEQNO)
848	rekey ();	982	rekey ();
849	}	983	}
850		984
851	void	985	void
		986	connection::post_inject_queue ()
		987	{
		988	// force a connection every now and when when packets are sent (max 1/s)
		989	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		990	establish_connection.stop ();
		991
		992	establish_connection ();
		993	}
		994
		995	void
852	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	996	connection::inject_data_packet (tap_packet *pkt)
853	{	997	{
854	if (ictx && octx)	998	if (ictx && octx)
855	send_data_packet (pkt);	999	send_data_packet (pkt);
856	else	1000	else
857	{	1001	{
858	if (!broadcast)//DDDD
859	data_queue.put (new tap_packet (*pkt));	1002	data_queue.put (new tap_packet (*pkt));
860		1003	post_inject_queue ();
861	establish_connection ();
862	}	1004	}
863	}	1005	}
864		1006
		1007	void
865	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1008	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
866	{	1009	{
867	if (ictx && octx)	1010	if (ictx && octx)
868	send_vpn_packet (pkt, si, tos);	1011	send_vpn_packet (pkt, si, tos);
869	else	1012	else
870	{	1013	{
871	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1014	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
872		1015	post_inject_queue ();
873	establish_connection ();
874	}	1016	}
875	}	1017	}
876		1018
877	void	1019	void
878	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1020	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
879	{	1021	{
880	last_activity = NOW;	1022	last_activity = ev_now ();
881		1023
882	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1024	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
883	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1025	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1026
		1027	if (connectmode == conf_node::C_DISABLED)
		1028	return;
884		1029
885	switch (pkt->typ ())	1030	switch (pkt->typ ())
886	{	1031	{
887	case vpn_packet::PT_PING:	1032	case vpn_packet::PT_PING:
		1033	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1034
888	// we send pings instead of auth packets after some retries,	1035	// we send pings instead of auth packets after some retries,
889	// so reset the retry counter and establish a connection	1036	// so reset the retry counter and establish a connection
890	// when we receive a ping.	1037	// when we receive a ping.
891	if (!ictx)	1038	if (!ictx)
892	{	1039	{
893	if (auth_rate_limiter.can (rsi))	1040	if (auth_rate_limiter.can (rsi))
894	send_auth_request (rsi, true);	1041	send_auth_request (rsi, true);
895	}	1042	}
896	else	1043	else
		1044	// we would love to change the socket address here, but ping's aren't
		1045	// authenticated, so we best ignore it.
897	send_ping (rsi, 1); // pong	1046	send_ping (rsi, 1); // pong
898		1047
899	break;	1048	break;
900		1049
901	case vpn_packet::PT_PONG:	1050	case vpn_packet::PT_PONG:
		1051	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1052
		1053	// a PONG might mean that the other side doesn't really know
		1054	// about our desire for communication.
		1055	establish_connection ();
902	break;	1056	break;
903		1057
904	case vpn_packet::PT_RESET:	1058	case vpn_packet::PT_RESET:
905	{	1059	{
906	reset_connection ();	1060	reset_connection ();
907		1061
908	config_packet p = (config_packet ) pkt;	1062	config_packet p = (config_packet ) pkt;
909		1063
910	if (!p->chk_config ())	1064	if (!p->chk_config ())
911	{	1065	{
912	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1066	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
913	conf->nodename, (const char *)rsi);	1067	conf->nodename, (const char *)rsi);
914	connectmode = conf_node::C_DISABLED;	1068	connectmode = conf_node::C_DISABLED;
915	}	1069	}
916	else if (connectmode == conf_node::C_ALWAYS)	1070	else if (connectmode == conf_node::C_ALWAYS)
917	establish_connection ();	1071	establish_connection ();
…		…
919	break;	1073	break;
920		1074
921	case vpn_packet::PT_AUTH_REQ:	1075	case vpn_packet::PT_AUTH_REQ:
922	if (auth_rate_limiter.can (rsi))	1076	if (auth_rate_limiter.can (rsi))
923	{	1077	{
924	auth_req_packet p = (auth_req_packet ) pkt;	1078	auth_req_packet p = (auth_req_packet )pkt;
925		1079
926	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1080	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1081	conf->nodename, p->initiate ? "initiate" : "reply",
		1082	p->protocols, p->features);
927		1083
928	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1084	if (p->chk_config () && !memcmp (p->magic, MAGIC, 8))
929	{	1085	{
930	if (p->prot_minor != PROTOCOL_MINOR)	1086	if (p->prot_minor != PROTOCOL_MINOR)
931	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1087	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
932	conf->nodename, (const char *)rsi,	1088	conf->nodename, (const char *)rsi,
933	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1089	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
934		1090
935	if (p->initiate)	1091	if (p->initiate)
936	send_auth_request (rsi, false);	1092	send_auth_request (rsi, false);
937		1093
938	rsachallenge k;	1094	auth_data auth;
939		1095
940	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1096	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
941	{	1097	{
942	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1098	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
943	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1099	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
944	break;
945	}	1100	}
946	else	1101	else
947	{	1102	{
948	delete octx;	1103	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
949		1104
950	octx = new crypto_ctx (k, 1);	1105	rcv_auth = auth;
951	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1106	have_rcv_auth = true;
952		1107
953	// compatibility code, remove when no longer required	1108	send_auth_response (rsi);
954	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
955		1109
		1110	if (chg)
		1111	{
956	conf->protocols = p->protocols;	1112	conf->protocols = p->protocols;
957	features = p->features & config_packet::get_features ();	1113	features = p->features & config_packet::get_features ();
958		1114
959	send_auth_response (rsi, p->id, k);
960
961	connection_established ();	1115	connection_established (rsi);
962
963	break;	1116	}
964	}	1117	}
		1118
		1119	break;
965	}	1120	}
966	else	1121	else
967	slog (L_WARN, _("%s(%s): protocol mismatch"),	1122	slog (L_WARN, _("%s(%s): protocol mismatch."),
968	conf->nodename, (const char *)rsi);	1123	conf->nodename, (const char *)rsi);
969		1124
970	send_reset (rsi);	1125	send_reset (rsi);
971	}	1126	}
972		1127
973	break;	1128	break;
974		1129
975	case vpn_packet::PT_AUTH_RES:	1130	case vpn_packet::PT_AUTH_RES:
976	{	1131	{
977	auth_res_packet p = (auth_res_packet ) pkt;	1132	auth_res_packet p = (auth_res_packet )pkt;
978		1133
979	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1134	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
980		1135
981	if (p->chk_config ())	1136	if (p->chk_config ())
982	{	1137	{
983	if (p->prot_minor != PROTOCOL_MINOR)	1138	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
984	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
985	conf->nodename, (const char *)rsi,
986	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
987
988	rsachallenge chg;
989
990	if (!rsa_cache.find (p->id, chg))
991	{	1139	{
992	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1140	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
993	conf->nodename, (const char *)rsi);	1141	conf->nodename, (const char *)rsi);
994	break;
995	}	1142	}
996	else	1143	else if (!have_snd_auth)
997	{	1144	{
998	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1145	if (p->prot_minor != PROTOCOL_MINOR)
999		1146	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
1000	if (!p->hmac_chk (cctx))
1001	{
1002	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1003	"could be an attack, or just corruption or a synchronization error"),
1004	conf->nodename, (const char *)rsi);	1147	conf->nodename, (const char *)rsi,
1005	break;	1148	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
1006	}
1007	else
1008	{
1009	rsaresponse h;
1010		1149
1011	rsa_hash (p->id, chg, h);
1012
1013	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1014	{
1015	prot_minor = p->prot_minor;	1150	prot_minor = p->prot_minor;
		1151	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
1016		1152
1017	delete ictx; ictx = cctx;	1153	have_snd_auth = true;
1018
1019	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1020
1021	si = rsi;
1022	protocol = rsi.prot;
1023
1024	connection_established ();	1154	connection_established (rsi);
1025
1026	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1027	conf->nodename, (const char *)rsi,
1028	p->prot_major, p->prot_minor);
1029
1030	if (::conf.script_node_up)
1031	run_script (run_script_cb (this, &connection::script_node_up), false);
1032
1033	break;
1034	}
1035	else
1036	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1037	conf->nodename, (const char *)rsi);
1038	}
1039
1040	delete cctx;
1041	}	1155	}
		1156
		1157	break;
1042	}	1158	}
1043	}	1159	}
1044		1160
1045	send_reset (rsi);	1161	send_reset (rsi);
1046	break;	1162	break;
…		…
1057	{	1173	{
1058	vpndata_packet p = (vpndata_packet )pkt;	1174	vpndata_packet p = (vpndata_packet )pkt;
1059		1175
1060	if (!p->hmac_chk (ictx))	1176	if (!p->hmac_chk (ictx))
1061	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"
1062	"could be an attack, or just corruption or a synchronization error"),	1178	"could be an attack, or just corruption or a synchronization error."),
1063	conf->nodename, (const char *)rsi);	1179	conf->nodename, (const char *)rsi);
1064	else	1180	else
1065	{	1181	{
1066	u32 seqno;	1182	u32 seqno;
1067	tap_packet *d = p->unpack (this, seqno);	1183	tap_packet *d = p->unpack (this, seqno);
		1184	int seqclass = iseqno.seqno_classify (seqno);
1068		1185
1069	if (iseqno.recv_ok (seqno))	1186	if (seqclass == 0) // ok
1070	{	1187	{
1071	vpn->tap->send (d);	1188	vpn->tap->send (d);
1072		1189
1073	if (si != rsi)	1190	if (si != rsi)
1074	{	1191	{
1075	// fast re-sync on connection 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.)
1076	si = rsi;	1194	// {
1077
1078	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1195	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1079	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);
1080	}	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);
1081	}	1224	}
1082		1225
1083	delete d;	1226	delete d;
1084	break;	1227	break;
1085	}	1228	}
…		…
1089	break;	1232	break;
1090		1233
1091	case vpn_packet::PT_CONNECT_REQ:	1234	case vpn_packet::PT_CONNECT_REQ:
1092	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1235	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1093	{	1236	{
1094	connect_req_packet p = (connect_req_packet ) pkt;	1237	connect_req_packet p = (connect_req_packet )pkt;
1095		1238
1096	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1239	if (p->id > 0 && p->id <= vpn->conns.size ())
1097	connection *c = vpn->conns[p->id - 1];
1098	conf->protocols = p->protocols;
1099
1100	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1101	conf->id, p->id, c->ictx && c->octx);
1102
1103	if (c->ictx && c->octx)
1104	{	1240	{
		1241	connection *c = vpn->conns[p->id - 1];
		1242	conf->protocols = p->protocols;
		1243
		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,
		1247	c->ictx && c->octx);
		1248
		1249	if (c->ictx && c->octx)
		1250	{
1105	// send connect_info packets to both sides, in case one is	1251	// send connect_info packets to both sides, in case one is
1106	// behind a nat firewall (or both ;)	1252	// behind a nat firewall (or both ;)
1107	c->send_connect_info (conf->id, si, conf->protocols);	1253	c->send_connect_info (conf->id, si, conf->protocols);
1108	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1254	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1255	}
		1256	else
		1257	c->establish_connection ();
1109	}	1258	}
1110	else	1259	else
1111	c->establish_connection ();	1260	slog (L_WARN,
		1261	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1262	p->id);
1112	}	1263	}
1113		1264
1114	break;	1265	break;
1115		1266
1116	case vpn_packet::PT_CONNECT_INFO:	1267	case vpn_packet::PT_CONNECT_INFO:
1117	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1268	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1118	{	1269	{
1119	connect_info_packet p = (connect_info_packet )pkt;	1270	connect_info_packet p = (connect_info_packet )pkt;
1120		1271
1121	if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything	1272	if (p->id > 0 && p->id <= vpn->conns.size ())
1122	{	1273	{
1123	connection *c = vpn->conns[p->id - 1];	1274	connection *c = vpn->conns[p->id - 1];
1124		1275
1125	c->conf->protocols = p->protocols;	1276	c->conf->protocols = p->protocols;
1126	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));
1127	p->si.upgrade_protocol (protocol, c->conf);	1278	p->si.upgrade_protocol (protocol, c->conf);
1128		1279
1129	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]",
1130	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);
1131		1288
1132	const sockinfo &dsi = forward_si (p->si);	1289	const sockinfo &dsi = forward_si (p->si);
1133		1290
1134	if (dsi.valid ())	1291	if (dsi.valid ())
1135	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);
1136	}	1297	}
		1298	else
		1299	slog (L_WARN,
		1300	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1301	p->id);
1137	}	1302	}
1138		1303
1139	break;	1304	break;
1140		1305
1141	default:	1306	default:
1142	send_reset (rsi);	1307	send_reset (rsi);
1143	break;	1308	break;
1144	}	1309	}
1145	}	1310	}
1146		1311
1147	void connection::keepalive_cb (time_watcher &w)	1312	inline void
		1313	connection::keepalive_cb (ev::timer &w, int revents)
1148	{	1314	{
1149	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)
1150	{	1320	{
1151	reset_connection ();	1321	reset_connection ();
1152	establish_connection ();	1322	establish_connection ();
1153	}	1323	}
1154	else if (NOW < last_activity + ::conf.keepalive)
1155	w.start (last_activity + ::conf.keepalive);
1156	else if (conf->connectmode != conf_node::C_ONDEMAND	1324	else if (conf->connectmode != conf_node::C_ONDEMAND
1157	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1325	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1158	{	1326	{
		1327	w.start (3);
1159	send_ping (si);	1328	send_ping (si);
1160	w.start (NOW + 5);
1161	}	1329	}
1162	else if (NOW < last_activity + ::conf.keepalive + 10)	1330	else if (when >= -10)
1163	// hold ondemand connections implicitly a few seconds longer	1331	// hold ondemand connections implicitly a few seconds longer
1164	// should delete octx, though, or something like that ;)	1332	// should delete octx, though, or something like that ;)
1165	w.start (last_activity + ::conf.keepalive + 10);	1333	w.start (when + 10);
1166	else	1334	else
1167	reset_connection ();	1335	reset_connection ();
1168	}	1336	}
1169		1337
		1338	void
1170	void connection::send_connect_request (int id)	1339	connection::send_connect_request (int id)
1171	{	1340	{
1172	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);
1173		1342
1174	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);
1175	p->hmac_set (octx);	1346	p->hmac_set (octx);
1176	send_vpn_packet (p, si);	1347	send_vpn_packet (p, si);
1177		1348
1178	delete p;	1349	delete p;
1179	}	1350	}
1180		1351
1181	void connection::script_node ()	1352	void
		1353	connection::script_init_env (const char *ext)
1182	{	1354	{
1183	vpn->script_if_up ();
1184
1185	char *env;	1355	char *env;
		1356	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1357	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1358	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1359	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1360	conf->id & 0xff); putenv (env);
		1361	}
		1362
		1363	void
		1364	connection::script_init_connect_env ()
		1365	{
		1366	vpn->script_init_env ();
		1367
		1368	char *env;
1186	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);
1187	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1371	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1188	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1372	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1189	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1373	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1190	}	1374	}
1191		1375
		1376	inline const char *
1192	const char *connection::script_node_up ()	1377	connection::script_node_up ()
1193	{	1378	{
1194	script_node ();	1379	script_init_connect_env ();
1195		1380
1196	putenv ("STATE=up");	1381	putenv ((char *)"STATE=up");
1197		1382
		1383	char *filename;
		1384	asprintf (&filename,
		1385	"%s/%s",
		1386	confbase,
1198	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1387	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1199	}
1200		1388
		1389	return filename;
		1390	}
		1391
		1392	inline const char *
		1393	connection::script_node_change ()
		1394	{
		1395	script_init_connect_env ();
		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 *
1201	const char *connection::script_node_down ()	1409	connection::script_node_down ()
1202	{	1410	{
1203	script_node ();	1411	script_init_connect_env ();
1204		1412
1205	putenv ("STATE=down");	1413	putenv ((char *)"STATE=down");
1206		1414
1207	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1415	char *filename;
		1416	asprintf (&filename,
		1417	"%s/%s",
		1418	confbase,
		1419	::conf.script_node_down ? ::conf.script_node_down : "node-down");
		1420
		1421	return filename;
1208	}	1422	}
1209		1423
1210	connection::connection (struct vpn vpn, conf_node conf)	1424	connection::connection (struct vpn vpn, conf_node conf)
1211	: vpn(vpn), conf(conf)	1425	: vpn(vpn), conf(conf),
1212	, rekey (this, &connection::rekey_cb)
1213	, keepalive (this, &connection::keepalive_cb)
1214	, establish_connection (this, &connection::establish_connection_cb)
1215	#if ENABLE_DNS	1426	#if ENABLE_DNS
1216	, dns (0)	1427	dns (0),
1217	#endif	1428	#endif
		1429	data_queue(conf->max_ttl, conf->max_queue + 1),
		1430	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1218	{	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.;
1219	octx = ictx = 0;	1437	octx = ictx = 0;
1220	retry_cnt = 0;
1221		1438
1222	if (!conf->protocols) // make sure some protocol is enabled	1439	connectmode = conf->connectmode;
1223	conf->protocols = PROT_UDPv4;
1224		1440
1225	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
1226	reset_connection ();	1445	reset_connection ();
1227	}	1446	}
1228		1447
1229	connection::~connection ()	1448	connection::~connection ()
1230	{	1449	{
1231	shutdown ();	1450	shutdown ();
1232	}	1451	}
1233		1452
		1453	void
1234	void connection_init ()	1454	connection_init ()
1235	{	1455	{
1236	auth_rate_limiter.clear ();	1456	auth_rate_limiter.clear ();
1237	reset_rate_limiter.clear ();	1457	reset_rate_limiter.clear ();
1238	}	1458	}
1239		1459

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Comparing gvpe/src/connection.C (file contents): Revision 1.47 by pcg, Mon Mar 7 01:31:26 2005 UTC vs. Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.47 by pcg, Mon Mar 7 01:31:26 2005 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC