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

Comparing gvpe/src/connection.C (file contents):
Revision 1.60 by pcg, Sat Nov 10 05:14:22 2007 UTC vs.
Revision 1.106 by root, Fri Jul 19 21:01:16 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, const ecdh_key &b, auth_mac &mac)
76	{	184	{
77	EVP_MD_CTX ctx;	185	hkdf kdf (b, sizeof b, AUTH_DIGEST ()); // use response ecdh b as salt
78		186	kdf.extract (&auth.rsa, sizeof (auth.rsa));
79	EVP_MD_CTX_init (&ctx);	187	kdf.extract_done ();
80	require (EVP_DigestInit (&ctx, RSA_HASH));	188	kdf.expand (mac, sizeof mac, auth.ecdh, sizeof (auth.ecdh)); // use challenge ecdh b as info
81	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));
82	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
83	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
84	EVP_MD_CTX_cleanup (&ctx);
85	}	189	}
86		190
87	struct rsa_entry {	191	void
88	tstamp expire;	192	connection::generate_auth_data ()
89	rsaid id;
90	rsachallenge chg;
91	};
92
93	struct rsa_cache : list<rsa_entry>
94	{	193	{
95	void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;	194	if (auth_expire < ev_now ())
96
97	bool find (const rsaid &id, rsachallenge &chg)
98	{
99	for (iterator i = begin (); i != end (); ++i)
100	{	195	{
101	if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev::ev_now ())	196	// request data
102	{	197	rand_fill (snd_auth.rsa);
103	memcpy (&chg, &i->chg, sizeof chg);	198	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
104		199
105	erase (i);	200	// eventual response data
106	return true;	201	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
107	}
108	}	202	}
109		203
110	if (!cleaner.is_active ())	204	// every use prolongs the expiry
111	cleaner.again ();
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 = ev::ev_now () + RSA_TTL;	205	auth_expire = ev_now () + AUTH_TTL;
124	e.id = id;
125	memcpy (&e.chg, &chg, sizeof chg);
126
127	push_back (e);
128
129	if (!cleaner.is_active ())
130	cleaner.again ();
131	}
132
133	rsa_cache ()
134	: cleaner (this, &rsa_cache::cleaner_cb)
135	{
136	cleaner.set (RSA_TTL, RSA_TTL);
137	}
138
139	} rsa_cache;
140
141	void rsa_cache::cleaner_cb (ev::timer &w, int revents)
142	{
143	if (empty ())
144	w.stop ();
145	else
146	{
147	for (iterator i = begin (); i != end (); )
148	if (i->expire <= ev::ev_now ())
149	i = erase (i);
150	else
151	++i;
152	}
153	}	206	}
154		207
155	//////////////////////////////////////////////////////////////////////////////	208	//////////////////////////////////////////////////////////////////////////////
156		209
157	void pkt_queue::put (net_packet *p)	210	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		211	: max_ttl (max_ttl), max_queue (max_queue)
158	{	212	{
159	if (queue[i])	213	queue = new pkt [max_queue];
160	{
161	delete queue[i];
162	j = (j + 1) % QUEUEDEPTH;
163	}
164		214
165	queue[i] = p;
166
167	i = (i + 1) % QUEUEDEPTH;
168	}
169
170	net_packet *pkt_queue::get ()
171	{
172	net_packet *p = queue[j];
173
174	if (p)
175	{
176	queue[j] = 0;
177	j = (j + 1) % QUEUEDEPTH;
178	}
179
180	return p;
181	}
182
183	pkt_queue::pkt_queue ()
184	{
185	memset (queue, 0, sizeof (queue));
186	i = 0;	215	i = 0;
187	j = 0;	216	j = 0;
		217
		218	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
188	}	219	}
189		220
190	pkt_queue::~pkt_queue ()	221	pkt_queue::~pkt_queue ()
191	{	222	{
192	for (i = QUEUEDEPTH; --i > 0; )	223	while (net_packet *p = get ())
		224	delete p;
		225
193	delete queue[i];	226	delete [] queue;
194	}	227	}
195		228
		229	void
		230	pkt_queue::expire_cb (ev::timer &w, int revents)
		231	{
		232	ev_tstamp expire = ev_now () - max_ttl;
		233
		234	for (;;)
		235	{
		236	if (empty ())
		237	break;
		238
		239	double diff = queue[j].tstamp - expire;
		240
		241	if (diff >= 0.)
		242	{
		243	w.start (diff > 0.5 ? diff : 0.5);
		244	break;
		245	}
		246
		247	delete get ();
		248	}
		249	}
		250
		251	void
		252	pkt_queue::put (net_packet *p)
		253	{
		254	ev_tstamp now = ev_now ();
		255
		256	// start expiry timer
		257	if (empty ())
		258	expire.start (max_ttl);
		259
		260	int ni = i + 1 == max_queue ? 0 : i + 1;
		261
		262	if (ni == j)
		263	delete get ();
		264
		265	queue[i].pkt = p;
		266	queue[i].tstamp = now;
		267
		268	i = ni;
		269	}
		270
		271	net_packet *
		272	pkt_queue::get ()
		273	{
		274	if (empty ())
		275	return 0;
		276
		277	net_packet *p = queue[j].pkt;
		278	queue[j].pkt = 0;
		279
		280	j = j + 1 == max_queue ? 0 : j + 1;
		281
		282	return p;
		283	}
		284
196	struct net_rateinfo {	285	struct net_rateinfo
		286	{
197	u32 host;	287	u32 host;
198	double pcnt, diff;	288	double pcnt, diff;
199	tstamp last;	289	tstamp last;
200	};	290	};
201		291
…		…
211		301
212	bool can (const sockinfo &si) { return can((u32)si.host); }	302	bool can (const sockinfo &si) { return can((u32)si.host); }
213	bool can (u32 host);	303	bool can (u32 host);
214	};	304	};
215		305
216	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	306	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
217		307
		308	bool
218	bool net_rate_limiter::can (u32 host)	309	net_rate_limiter::can (u32 host)
219	{	310	{
220	iterator i;	311	iterator i;
221		312
222	for (i = begin (); i != end (); )	313	for (i = begin (); i != end (); )
223	if (i->host == host)	314	if (i->host == host)
224	break;	315	break;
225	else if (i->last < ev::ev_now () - NRL_EXPIRE)	316	else if (i->last < ev_now () - NRL_EXPIRE)
226	i = erase (i);	317	i = erase (i);
227	else	318	else
228	i++;	319	i++;
229		320
230	if (i == end ())	321	if (i == end ())
…		…
232	net_rateinfo ri;	323	net_rateinfo ri;
233		324
234	ri.host = host;	325	ri.host = host;
235	ri.pcnt = 1.;	326	ri.pcnt = 1.;
236	ri.diff = NRL_MAXDIF;	327	ri.diff = NRL_MAXDIF;
237	ri.last = ev::ev_now ();	328	ri.last = ev_now ();
238		329
239	push_front (ri);	330	push_front (ri);
240		331
241	return true;	332	return true;
242	}	333	}
…		…
244	{	335	{
245	net_rateinfo ri (*i);	336	net_rateinfo ri (*i);
246	erase (i);	337	erase (i);
247		338
248	ri.pcnt = ri.pcnt * NRL_ALPHA;	339	ri.pcnt = ri.pcnt * NRL_ALPHA;
249	ri.diff = ri.diff * NRL_ALPHA + (ev::ev_now () - ri.last);	340	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
250		341
251	ri.last = ev::ev_now ();	342	ri.last = ev_now ();
252		343
253	double dif = ri.diff / ri.pcnt;	344	double dif = ri.diff / ri.pcnt;
254		345
255	bool send = dif > NRL_CUTOFF;	346	bool send = dif > NRL_CUTOFF;
256		347
…		…
268	}	359	}
269	}	360	}
270		361
271	/////////////////////////////////////////////////////////////////////////////	362	/////////////////////////////////////////////////////////////////////////////
272		363
273	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	364	void
274
275	void hmac_packet::hmac_gen (crypto_ctx *ctx)	365	hmac_packet::hmac_gen (crypto_ctx ctx, u8 hmac_digest)
276	{	366	{
277	unsigned int xlen;
278
279	HMAC_CTX *hctx = &ctx->hctx;	367	HMAC_CTX *hctx = &ctx->hctx;
280		368
281	HMAC_Init_ex (hctx, 0, 0, 0, 0);	369	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
282	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	370	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), len - sizeof (hmac_packet)));
283	len - sizeof (hmac_packet));	371	require (HMAC_Final (hctx, hmac_digest, 0));
284	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);
285	}	372	}
286		373
287	void	374	void
288	hmac_packet::hmac_set (crypto_ctx *ctx)	375	hmac_packet::hmac_set (crypto_ctx *ctx)
289	{	376	{
290	hmac_gen (ctx);	377	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
291		378	hmac_gen (ctx, hmac_digest);
292	memcpy (hmac, hmac_digest, HMACLENGTH);	379	memcpy (hmac, hmac_digest, HMACLENGTH);
293	}	380	}
294		381
295	bool	382	bool
296	hmac_packet::hmac_chk (crypto_ctx *ctx)	383	hmac_packet::hmac_chk (crypto_ctx *ctx)
297	{	384	{
298	hmac_gen (ctx);	385	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
299		386	hmac_gen (ctx, hmac_digest);
300	return !memcmp (hmac, hmac_digest, HMACLENGTH);	387	return !memcmp (hmac, hmac_digest, HMACLENGTH);
301	}	388	}
302		389
		390	void
303	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	391	vpn_packet::set_hdr (ptype type_, unsigned int dst)
304	{	392	{
305	type = type_;	393	type = type_;
306		394
307	int src = THISNODE->id;	395	int src = THISNODE->id;
308		396
…		…
313		401
314	#define MAXVPNDATA (MAX_MTU - 6 - 6)	402	#define MAXVPNDATA (MAX_MTU - 6 - 6)
315	#define DATAHDR (sizeof (u32) + RAND_SIZE)	403	#define DATAHDR (sizeof (u32) + RAND_SIZE)
316		404
317	struct vpndata_packet : vpn_packet	405	struct vpndata_packet : vpn_packet
		406	{
		407	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		408
		409	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		410	tap_packet unpack (connection conn, u32 &seqno);
		411
		412	private:
		413	const u32 data_hdr_size () const
318	{	414	{
319	u8 data[MAXVPNDATA + DATAHDR]; // seqno
320
321	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
322	tap_packet unpack (connection conn, u32 &seqno);
323	private:
324
325	const u32 data_hdr_size () const
326	{
327	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	415	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
328	}
329	};	416	}
		417	};
330		418
331	void	419	void
332	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	420	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
333	{	421	{
334	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	422	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
336	ptype type = PT_DATA_UNCOMPRESSED;	424	ptype type = PT_DATA_UNCOMPRESSED;
337		425
338	#if ENABLE_COMPRESSION	426	#if ENABLE_COMPRESSION
339	u8 cdata[MAX_MTU];	427	u8 cdata[MAX_MTU];
340		428
341	if (conn->features & ENABLE_COMPRESSION)	429	if (conn->features & FEATURE_COMPRESSION)
342	{	430	{
343	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	431	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
344		432
345	if (cl)	433	if (cl)
346	{	434	{
…		…
352	d[1] = cl;	440	d[1] = cl;
353	}	441	}
354	}	442	}
355	#endif	443	#endif
356		444
357	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	445	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
358		446
359	struct {	447	struct {
360	#if RAND_SIZE	448	#if RAND_SIZE
361	u8 rnd[RAND_SIZE];	449	u8 rnd[RAND_SIZE];
362	#endif	450	#endif
363	u32 seqno;	451	u32 seqno;
364	} datahdr;	452	} datahdr;
365		453
366	datahdr.seqno = ntohl (seqno);	454	datahdr.seqno = ntohl (seqno);
367	#if RAND_SIZE	455	#if RAND_SIZE
368	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	456	// NB: a constant (per session) random prefix
		457	// is likely enough, but we don't take any chances.
		458	conn->oiv.get (datahdr.rnd, RAND_SIZE);
369	#endif	459	#endif
370		460
371	require (EVP_EncryptUpdate (cctx,	461	require (EVP_EncryptUpdate (cctx,
372	(unsigned char *) data + outl, &outl2,	462	(unsigned char *) data + outl, &outl2,
373	(unsigned char *) &datahdr, DATAHDR));	463	(unsigned char *) &datahdr, DATAHDR));
…		…
395	int outl = 0, outl2;	485	int outl = 0, outl2;
396	tap_packet *p = new tap_packet;	486	tap_packet *p = new tap_packet;
397	u8 *d;	487	u8 *d;
398	u32 l = len - data_hdr_size ();	488	u32 l = len - data_hdr_size ();
399		489
400	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	490	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
401		491
402	#if ENABLE_COMPRESSION	492	#if ENABLE_COMPRESSION
403	u8 cdata[MAX_MTU];	493	u8 cdata[MAX_MTU];
404		494
405	if (type == PT_DATA_COMPRESSED)	495	if (type == PT_DATA_COMPRESSED)
406	d = cdata;	496	d = cdata;
407	else	497	else
408	#endif	498	#endif
409	d = &(*p)[6 + 6 - DATAHDR];	499	d = &(*p)[6 + 6] - DATAHDR;
410		500
411	/* this overwrites part of the src mac, but we fix that later */	501	// we play do evil games with the struct layout atm.
		502	// pending better solutions, we at least do some verification.
		503	// this is fine, as we left ISO territory long ago.
		504	require (DATAHDR <= 16);
		505	require ((u8 )(&p->len + 1) == &(p)[0]);
		506
		507	// this can overwrite the len/dst/src fields
412	require (EVP_DecryptUpdate (cctx,	508	require (EVP_DecryptUpdate (cctx,
413	d, &outl2,	509	d, &outl2,
414	(unsigned char *)&data, len - data_hdr_size ()));	510	(unsigned char *)&data, len - data_hdr_size ()));
415	outl += outl2;	511	outl += outl2;
416		512
…		…
447	}	543	}
448	};	544	};
449		545
450	struct config_packet : vpn_packet	546	struct config_packet : vpn_packet
451	{	547	{
452	// actually, hmaclen cannot be checked because the hmac	548	u8 serial[SERIAL_SIZE];
453	// field comes before this data, so peers with other
454	// hmacs simply will not work.
455	u8 prot_major, prot_minor, randsize, hmaclen;	549	u8 prot_major, prot_minor, randsize;
456	u8 flags, challengelen, features, pad3;	550	u8 flags, features, pad6, pad7, pad8;
457	u32 cipher_nid, digest_nid, hmac_nid;	551	u32 cipher_nid, mac_nid, auth_nid;
458		552
459	void setup (ptype type, int dst);	553	void setup (ptype type, int dst);
460	bool chk_config () const;	554	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
461		555
462	static u8 get_features ()	556	static u8 get_features ()
463	{	557	{
464	u8 f = 0;	558	u8 f = 0;
465	#if ENABLE_COMPRESSION	559	#if ENABLE_COMPRESSION
…		…
473	#endif	567	#endif
474	return f;	568	return f;
475	}	569	}
476	};	570	};
477		571
		572	void
478	void config_packet::setup (ptype type, int dst)	573	config_packet::setup (ptype type, int dst)
479	{	574	{
480	prot_major = PROTOCOL_MAJOR;	575	prot_major = PROTOCOL_MAJOR;
481	prot_minor = PROTOCOL_MINOR;	576	prot_minor = PROTOCOL_MINOR;
482	randsize = RAND_SIZE;	577	randsize = RAND_SIZE;
483	hmaclen = HMACLENGTH;
484	flags = 0;	578	flags = 0;
485	challengelen = sizeof (rsachallenge);
486	features = get_features ();	579	features = get_features ();
487		580
		581	strncpy ((char *)serial, conf.serial, sizeof (serial));
		582
488	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	583	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
489	digest_nid = htonl (EVP_MD_type (RSA_HASH));
490	hmac_nid = htonl (EVP_MD_type (DIGEST));	584	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		585	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
491		586
492	len = sizeof (*this) - sizeof (net_packet);	587	len = sizeof (*this) - sizeof (net_packet);
493	set_hdr (type, dst);	588	set_hdr (type, dst);
494	}	589	}
495		590
496	bool config_packet::chk_config () const	591	bool
		592	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
497	{	593	{
498	if (prot_major != PROTOCOL_MAJOR)	594	if (prot_major != PROTOCOL_MAJOR)
499	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	595	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		596	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
500	else if (randsize != RAND_SIZE)	597	else if (randsize != RAND_SIZE)
501	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	598	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
502	else if (hmaclen != HMACLENGTH)	599	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
503	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
504	else if (challengelen != sizeof (rsachallenge))
505	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
506	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	600	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
507	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	601	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
508	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	602	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
509	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
510	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	603	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
511	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	604	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		605	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		606	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		607	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		608	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
512	else	609	else
		610	{
		611	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		612
		613	if (cmp > 0)
		614	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		615	conf->nodename, (const char *)rsi);
		616	else if (cmp == 0)
513	return true;	617	return true;
		618	}
514		619
515	return false;	620	return false;
516	}	621	}
517		622
518	struct auth_req_packet : config_packet	623	struct auth_req_packet : config_packet // UNPROTECTED
519	{	624	{
520	char magic[8];	625	char magic[8];
521	u8 initiate; // false if this is just an automatic reply	626	u8 initiate; // false if this is just an automatic reply
522	u8 protocols; // supported protocols (will be patched on forward)	627	u8 protocols; // supported protocols (will be patched on forward)
523	u8 pad2, pad3;	628	u8 pad2, pad3;
524	rsaid id;	629	auth_encr encr;
525	rsaencrdata encr;
526		630
527	auth_req_packet (int dst, bool initiate_, u8 protocols_)	631	auth_req_packet (int dst, bool initiate_, u8 protocols_)
528	{	632	{
529	config_packet::setup (PT_AUTH_REQ, dst);	633	config_packet::setup (PT_AUTH_REQ, dst);
530	strncpy (magic, MAGIC, 8);	634	memcpy (magic, MAGIC, 8);
531	initiate = !!initiate_;	635	initiate = !!initiate_;
532	protocols = protocols_;	636	protocols = protocols_;
533		637
534	len = sizeof (*this) - sizeof (net_packet);	638	len = sizeof (*this) - sizeof (net_packet);
535	}	639	}
536	};	640	};
537		641
538	struct auth_res_packet : config_packet	642	struct auth_res_packet : vpn_packet // UNPROTECTED
539	{	643	{
540	rsaid id;
541	u8 pad1, pad2, pad3;
542	u8 response_len; // encrypted length
543	rsaresponse response;	644	auth_response response;
544		645
545	auth_res_packet (int dst)	646	auth_res_packet (int dst)
546	{	647	{
547	config_packet::setup (PT_AUTH_RES, dst);	648	set_hdr (PT_AUTH_RES, dst);
548		649
549	len = sizeof (*this) - sizeof (net_packet);	650	len = sizeof (*this) - sizeof (net_packet);
550	}	651	}
551	};	652	};
552		653
…		…
582	};	683	};
583		684
584	/////////////////////////////////////////////////////////////////////////////	685	/////////////////////////////////////////////////////////////////////////////
585		686
586	void	687	void
587	connection::connection_established ()	688	connection::connection_established (const sockinfo &rsi)
588	{	689	{
		690	if (!have_snd_auth \|\| !have_rcv_auth)
		691	return;
		692
		693	si = rsi;
		694	protocol = rsi.prot;
		695
		696	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		697	conf->nodename, (const char *)rsi,
		698	is_direct ? "direct" : "forwarded",
		699	PROTOCOL_MAJOR, prot_minor);
		700
		701	if (::conf.script_node_up)
		702	{
		703	run_script_cb *cb = new run_script_cb;
		704	cb->set<connection, &connection::script_node_up> (this);
		705	run_script_queued (cb, _("node-up command execution failed, continuing."));
		706	}
		707
		708	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		709	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		710
		711	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		712	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		713
		714	oiv.reset ();
		715
		716	// make sure rekeying timeouts are slightly asymmetric
		717	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		718	rekey.start (rekey_interval, rekey_interval);
		719
		720	keepalive.start (::conf.keepalive);
		721
		722	// send queued packets
589	if (ictx && octx)	723	if (ictx && octx)
590	{	724	{
591	connectmode = conf->connectmode;	725	while (tap_packet p = (tap_packet )data_queue.get ())
592
593	// make sure rekeying timeouts are slightly asymmetric
594	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
595	rekey.start (rekey_interval, rekey_interval);
596	keepalive.start (::conf.keepalive);
597
598	// send queued packets
599	if (ictx && octx)
600	{	726	{
601	while (tap_packet p = (tap_packet )data_queue.get ())
602	{
603	send_data_packet (p);	727	if (p->len) send_data_packet (p);
604	delete p;	728	delete p;
605	}
606
607	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
608	{
609	send_vpn_packet (p, si, IPTOS_RELIABILITY);
610	delete p;
611	}
612	}	729	}
		730
		731	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		732	{
		733	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
		734	delete p;
		735	}
613	}	736	}
		737
		738	vpn->connection_established (this);
		739	}
		740
		741	void
		742	connection::reset_si ()
		743	{
		744	if (vpn->can_direct (THISNODE, conf))
		745	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
614	else	746	else
615	{	747	{
616	retry_cnt = 0;
617	establish_connection.start (5);
618	keepalive.stop ();
619	rekey.stop ();
620	}
621	}
622
623	void
624	connection::reset_si ()
625	{
626	protocol = best_protocol (THISNODE->protocols & conf->protocols);
627
628	// mask out protocols we cannot establish
629	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
630	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
631	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
632
633	if (protocol
634	&& (!conf->can_direct (THISNODE)
635	\|\| !THISNODE->can_direct (conf)))
636	{
637	slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename);	748	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
638	protocol = 0;	749	protocol = 0;
639	}	750	}
640		751
641	si.set (conf, protocol);	752	si.set (conf, protocol);
		753
		754	is_direct = si.valid ();
642	}	755	}
643		756
644	// ensure sockinfo is valid, forward if necessary	757	// ensure sockinfo is valid, forward if necessary
645	const sockinfo &	758	const sockinfo &
646	connection::forward_si (const sockinfo &si) const	759	connection::forward_si (const sockinfo &si) const
647	{	760	{
648	if (!si.valid ())	761	if (!si.valid ())
649	{	762	{
650	connection *r = vpn->find_router ();	763	connection *r = vpn->find_router_for (this);
651		764
652	if (r)	765	if (r)
653	{	766	{
654	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	767	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
655	conf->nodename, r->conf->nodename, (const char *)r->si);	768	conf->nodename, r->conf->nodename);
656	return r->si;	769	return r->si;
657	}	770	}
658	else	771	else
659	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	772	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
660	conf->nodename);	773	conf->nodename);
661	}	774	}
662		775
663	return si;	776	return si;
664	}	777	}
…		…
674	connection::send_ping (const sockinfo &si, u8 pong)	787	connection::send_ping (const sockinfo &si, u8 pong)
675	{	788	{
676	ping_packet *pkt = new ping_packet;	789	ping_packet *pkt = new ping_packet;
677		790
678	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	791	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		792
		793	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
679	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	794	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
680		795
681	delete pkt;	796	delete pkt;
682	}	797	}
683		798
…		…
698	void	813	void
699	connection::send_auth_request (const sockinfo &si, bool initiate)	814	connection::send_auth_request (const sockinfo &si, bool initiate)
700	{	815	{
701	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	816	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
702		817
703	rsachallenge chg;	818	generate_auth_data ();
704	rsa_cache.gen (pkt->id, chg);
705	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	819	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
706		820
707	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	821	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
708
709	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	822	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
710		823
711	delete pkt;	824	delete pkt;
712	}	825	}
713		826
714	void	827	void
715	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	828	connection::send_auth_response (const sockinfo &si)
716	{	829	{
717	auth_res_packet *pkt = new auth_res_packet (conf->id);	830	auth_res_packet *pkt = new auth_res_packet (conf->id);
718		831
719	pkt->id = id;	832	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof rcv_ecdh_b);
		833	auth_hash (rcv_auth, rcv_ecdh_b, pkt->response.mac);
720		834
721	rsa_hash (id, chg, pkt->response);
722
723	pkt->hmac_set (octx);
724
725	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	835	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
726
727	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	836	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
728		837
729	delete pkt;	838	delete pkt;
730	}	839	}
731		840
732	void	841	void
733	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	842	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
734	{	843	{
735	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)",	844	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
736	conf->id, rid, (const char *)rsi);	845	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		846	conf->protocols);
737		847
738	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	848	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
739		849
740	r->hmac_set (octx);	850	r->hmac_set (octx);
741	send_vpn_packet (r, si);	851	send_vpn_packet (r, si);
742		852
743	delete r;	853	delete r;
744	}	854	}
745		855
746	void	856	inline void
747	connection::establish_connection_cb (ev::timer &w, int revents)	857	connection::establish_connection_cb (ev::timer &w, int revents)
748	{	858	{
749	if (!ictx	859	if (!(ictx && octx)
750	&& conf != THISNODE	860	&& conf != THISNODE
751	&& connectmode != conf_node::C_NEVER	861	&& connectmode != conf_node::C_NEVER
752	&& connectmode != conf_node::C_DISABLED	862	&& connectmode != conf_node::C_DISABLED
753	&& !w.is_active ())	863	&& !w.is_active ())
754	{	864	{
		865	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		866	// and stop trying. should probably be handled by a per-connection expire handler.
		867	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		868	{
		869	reset_connection ();
		870	return;
		871	}
		872
		873	last_establish_attempt = ev_now ();
		874
755	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3	875	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
756	? (retry_cnt & 3) + 1	876	? (retry_cnt & 3) + 1
757	: 1 << (retry_cnt >> 2));	877	: 1 << (retry_cnt >> 2));
758		878
759	reset_si ();	879	reset_si ();
760		880
761	bool slow = si.prot & PROT_SLOW;	881	bool slow = si.prot & PROT_SLOW;
762		882
763	if (si.prot && !si.host)	883	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
764	{	884	{
765	/TODO/ /* start the timer so we don't recurse endlessly */	885	/TODO/ /* start the timer so we don't recurse endlessly */
766	w.start (1);	886	w.start (1);
767	vpn->send_connect_request (conf->id);	887	vpn->send_connect_request (this);
768	}	888	}
769	else	889	else
770	{	890	{
		891	if (si.valid ())
		892	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		893	conf->nodename, (const char *)si);
		894
771	const sockinfo &dsi = forward_si (si);	895	const sockinfo &dsi = forward_si (si);
772		896
773	slow = slow \|\| (dsi.prot & PROT_SLOW);	897	slow = slow \|\| (dsi.prot & PROT_SLOW);
774		898
775	if (dsi.valid () && auth_rate_limiter.can (dsi))	899	if (dsi.valid () && auth_rate_limiter.can (dsi))
…		…
779	else	903	else
780	send_ping (dsi, 0);	904	send_ping (dsi, 0);
781	}	905	}
782	}	906	}
783		907
784	retry_int *= slow ? 8. : 0.7;	908	retry_int *= slow ? 8. : 0.9;
785		909
786	if (retry_int < conf->max_retry)	910	if (retry_int < conf->max_retry)
787	retry_cnt++;	911	retry_cnt++;
788	else	912	else
789	retry_int = conf->max_retry;	913	retry_int = conf->max_retry;
…		…
799	{	923	{
800	slog (L_INFO, _("%s(%s): connection lost"),	924	slog (L_INFO, _("%s(%s): connection lost"),
801	conf->nodename, (const char *)si);	925	conf->nodename, (const char *)si);
802		926
803	if (::conf.script_node_down)	927	if (::conf.script_node_down)
804	if (!run_script (run_script_cb (this, &connection::script_node_down), false))	928	{
		929	run_script_cb *cb = new run_script_cb;
		930	cb->set<connection, &connection::script_node_down> (this);
805	slog (L_WARN, _("node-down command execution failed, continuing."));	931	run_script_queued (cb, _("node-down command execution failed, continuing."));
		932	}
806	}	933	}
807		934
808	delete ictx; ictx = 0;	935	delete ictx; ictx = 0;
809	delete octx; octx = 0;	936	delete octx; octx = 0;
810	#if ENABLE_DNS
811	dnsv4_reset_connection ();
812	#endif
813		937
814	si.host = 0;	938	si.host = 0;
815		939
		940	have_snd_auth = false;
		941	have_rcv_auth = false;
		942	auth_expire = 0.;
		943
816	last_activity = 0;	944	last_activity = 0.;
		945	//last_si_change = 0.;
817	retry_cnt = 0;	946	retry_cnt = 0;
818		947
819	rekey.stop ();	948	rekey.stop ();
820	keepalive.stop ();	949	keepalive.stop ();
821	establish_connection.stop ();	950	establish_connection.stop ();
…		…
828	send_reset (si);	957	send_reset (si);
829		958
830	reset_connection ();	959	reset_connection ();
831	}	960	}
832		961
833	void	962	// poor-man's rekeying
		963	inline void
834	connection::rekey_cb (ev::timer &w, int revents)	964	connection::rekey_cb (ev::timer &w, int revents)
835	{	965	{
836	reset_connection ();	966	reset_connection ();
837	establish_connection ();	967	establish_connection ();
838	}	968	}
…		…
855	if (oseqno > MAX_SEQNO)	985	if (oseqno > MAX_SEQNO)
856	rekey ();	986	rekey ();
857	}	987	}
858		988
859	void	989	void
		990	connection::post_inject_queue ()
		991	{
		992	// force a connection every now and when when packets are sent (max 1/s)
		993	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		994	establish_connection.stop ();
		995
		996	establish_connection ();
		997	}
		998
		999	void
860	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1000	connection::inject_data_packet (tap_packet *pkt)
861	{	1001	{
862	if (ictx && octx)	1002	if (ictx && octx)
863	send_data_packet (pkt);	1003	send_data_packet (pkt);
864	else	1004	else
865	{	1005	{
866	if (!broadcast)
867	data_queue.put (new tap_packet (*pkt));	1006	data_queue.put (new tap_packet (*pkt));
868		1007	post_inject_queue ();
869	establish_connection ();
870	}	1008	}
871	}	1009	}
872		1010
		1011	void
873	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1012	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
874	{	1013	{
875	if (ictx && octx)	1014	if (ictx && octx)
876	send_vpn_packet (pkt, si, tos);	1015	send_vpn_packet (pkt, si, tos);
877	else	1016	else
878	{	1017	{
879	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1018	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
880		1019	post_inject_queue ();
881	establish_connection ();
882	}	1020	}
883	}	1021	}
884		1022
885	void	1023	void
886	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1024	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
887	{	1025	{
888	last_activity = ev::ev_now ();	1026	last_activity = ev_now ();
889		1027
890	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1028	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
891	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1029	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1030
		1031	if (connectmode == conf_node::C_DISABLED)
		1032	return;
892		1033
893	switch (pkt->typ ())	1034	switch (pkt->typ ())
894	{	1035	{
895	case vpn_packet::PT_PING:	1036	case vpn_packet::PT_PING:
		1037	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1038
896	// we send pings instead of auth packets after some retries,	1039	// we send pings instead of auth packets after some retries,
897	// so reset the retry counter and establish a connection	1040	// so reset the retry counter and establish a connection
898	// when we receive a ping.	1041	// when we receive a ping.
899	if (!ictx)	1042	if (!ictx)
900	{	1043	{
901	if (auth_rate_limiter.can (rsi))	1044	if (auth_rate_limiter.can (rsi))
902	send_auth_request (rsi, true);	1045	send_auth_request (rsi, true);
903	}	1046	}
904	else	1047	else
		1048	// we would love to change the socket address here, but ping's aren't
		1049	// authenticated, so we best ignore it.
905	send_ping (rsi, 1); // pong	1050	send_ping (rsi, 1); // pong
906		1051
907	break;	1052	break;
908		1053
909	case vpn_packet::PT_PONG:	1054	case vpn_packet::PT_PONG:
		1055	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1056
		1057	// a PONG might mean that the other side doesn't really know
		1058	// about our desire for communication.
		1059	establish_connection ();
910	break;	1060	break;
911		1061
912	case vpn_packet::PT_RESET:	1062	case vpn_packet::PT_RESET:
913	{	1063	{
914	reset_connection ();	1064	reset_connection ();
915		1065
916	config_packet p = (config_packet ) pkt;	1066	config_packet p = (config_packet ) pkt;
917		1067
918	if (!p->chk_config ())	1068	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
919	{
920	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
921	conf->nodename, (const char *)rsi);
922	connectmode = conf_node::C_DISABLED;
923	}
924	else if (connectmode == conf_node::C_ALWAYS)
925	establish_connection ();	1069	establish_connection ();
926	}	1070	}
927	break;	1071	break;
928		1072
929	case vpn_packet::PT_AUTH_REQ:	1073	case vpn_packet::PT_AUTH_REQ:
930	if (auth_rate_limiter.can (rsi))	1074	if (auth_rate_limiter.can (rsi))
931	{	1075	{
932	auth_req_packet p = (auth_req_packet ) pkt;	1076	auth_req_packet p = (auth_req_packet )pkt;
933		1077
934	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1078	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1079	conf->nodename, p->initiate ? "initiate" : "reply",
		1080	p->protocols, p->features);
935		1081
936	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1082	if (memcmp (p->magic, MAGIC, 8))
		1083	{
		1084	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1085	conf->nodename, (const char *)rsi);
		1086	}
		1087	else if (p->chk_config (conf, rsi))
937	{	1088	{
938	if (p->prot_minor != PROTOCOL_MINOR)	1089	if (p->prot_minor != PROTOCOL_MINOR)
939	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1090	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
940	conf->nodename, (const char *)rsi,	1091	conf->nodename, (const char *)rsi,
941	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1092	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
942		1093
943	if (p->initiate)	1094	if (p->initiate)
944	send_auth_request (rsi, false);	1095	send_auth_request (rsi, false);
945		1096
946	rsachallenge k;	1097	auth_data auth;
947		1098
948	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1099	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
949	{	1100	{
950	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1101	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
951	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1102	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
952	break;
953	}	1103	}
954	else	1104	else
955	{	1105	{
956	delete octx;	1106	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
957		1107
958	octx = new crypto_ctx (k, 1);	1108	rcv_auth = auth;
959	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1109	have_rcv_auth = true;
960		1110
		1111	send_auth_response (rsi);
		1112
		1113	if (chg)
		1114	{
961	conf->protocols = p->protocols;	1115	conf->protocols = p->protocols;
962	features = p->features & config_packet::get_features ();	1116	features = p->features & config_packet::get_features ();
963		1117
964	send_auth_response (rsi, p->id, k);
965
966	connection_established ();	1118	connection_established (rsi);
967
968	break;	1119	}
969	}	1120	}
		1121
		1122	break;
970	}	1123	}
971	else
972	slog (L_WARN, _("%s(%s): protocol mismatch"),
973	conf->nodename, (const char *)rsi);
974		1124
975	send_reset (rsi);	1125	send_reset (rsi);
976	}	1126	}
977		1127
978	break;	1128	break;
979		1129
980	case vpn_packet::PT_AUTH_RES:	1130	case vpn_packet::PT_AUTH_RES:
981	{	1131	{
982	auth_res_packet p = (auth_res_packet ) pkt;	1132	auth_res_packet p = (auth_res_packet )pkt;
983		1133
984	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1134	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
985		1135
986	if (p->chk_config ())	1136	auth_mac local_mac;
		1137	auth_hash (snd_auth, p->response.ecdh, local_mac);
		1138
		1139	if (memcmp (&p->response.mac, local_mac, sizeof local_mac))
987	{	1140	{
988	if (p->prot_minor != PROTOCOL_MINOR)
989	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
990	conf->nodename, (const char *)rsi,
991	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
992
993	rsachallenge chg;
994
995	if (!rsa_cache.find (p->id, chg))
996	{
997	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1141	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
998	conf->nodename, (const char *)rsi);	1142	conf->nodename, (const char *)rsi);
999	break;
1000	}	1143	}
1001	else	1144	else if (!have_snd_auth)
1002	{	1145	{
1003	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1146	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
1004		1147
1005	if (!p->hmac_chk (cctx))	1148	have_snd_auth = true;
1006	{
1007	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1008	"could be an attack, or just corruption or a synchronization error"),
1009	conf->nodename, (const char *)rsi);
1010	break;
1011	}
1012	else
1013	{
1014	rsaresponse h;
1015
1016	rsa_hash (p->id, chg, h);
1017
1018	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1019	{
1020	prot_minor = p->prot_minor;
1021
1022	delete ictx; ictx = cctx;
1023
1024	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1025
1026	si = rsi;
1027	protocol = rsi.prot;
1028
1029	connection_established ();	1149	connection_established (rsi);
1030
1031	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1032	conf->nodename, (const char *)rsi,
1033	p->prot_major, p->prot_minor);
1034
1035	if (::conf.script_node_up)
1036	if (!run_script (run_script_cb (this, &connection::script_node_up), false))
1037	slog (L_WARN, _("node-up command execution failed, continuing."));
1038
1039	break;
1040	}
1041	else
1042	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1043	conf->nodename, (const char *)rsi);
1044	}
1045
1046	delete cctx;
1047	}
1048	}	1150	}
1049	}	1151	}
1050
1051	send_reset (rsi);
1052	break;	1152	break;
1053		1153
1054	case vpn_packet::PT_DATA_COMPRESSED:	1154	case vpn_packet::PT_DATA_COMPRESSED:
1055	#if !ENABLE_COMPRESSION	1155	#if !ENABLE_COMPRESSION
1056	send_reset (rsi);	1156	send_reset (rsi);
…		…
1063	{	1163	{
1064	vpndata_packet p = (vpndata_packet )pkt;	1164	vpndata_packet p = (vpndata_packet )pkt;
1065		1165
1066	if (!p->hmac_chk (ictx))	1166	if (!p->hmac_chk (ictx))
1067	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1167	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1068	"could be an attack, or just corruption or a synchronization error"),	1168	"could be an attack, or just corruption or a synchronization error."),
1069	conf->nodename, (const char *)rsi);	1169	conf->nodename, (const char *)rsi);
1070	else	1170	else
1071	{	1171	{
1072	u32 seqno;	1172	u32 seqno;
1073	tap_packet *d = p->unpack (this, seqno);	1173	tap_packet *d = p->unpack (this, seqno);
		1174	int seqclass = iseqno.seqno_classify (seqno);
1074		1175
1075	if (iseqno.recv_ok (seqno))	1176	if (seqclass == 0) // ok
1076	{	1177	{
1077	vpn->tap->send (d);	1178	vpn->tap->send (d);
1078		1179
1079	if (si != rsi)	1180	if (si != rsi)
1080	{	1181	{
1081	// fast re-sync on source address changes, useful especially for tcp/ip	1182	// fast re-sync on source address changes, useful especially for tcp/ip
		1183	//if (last_si_change < ev_now () + 5.)
1082	si = rsi;	1184	// {
1083
1084	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1185	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1085	conf->nodename, (const char )si, (const char )rsi);	1186	conf->nodename, (const char )si, (const char )rsi);
		1187
		1188	si = rsi;
		1189
		1190	if (::conf.script_node_change)
		1191	{
		1192	run_script_cb *cb = new run_script_cb;
		1193	cb->set<connection, &connection::script_node_change> (this);
		1194	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1195	}
		1196
		1197	// }
		1198	//else
		1199	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1200	// conf->nodename, (const char )si, (const char )rsi);
1086	}	1201	}
		1202	}
		1203	else if (seqclass == 1) // far history
		1204	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1205	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1206	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1207	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1208	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1209	else if (seqclass == 3) // reset
		1210	{
		1211	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1212	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1213	send_reset (rsi);
1087	}	1214	}
1088		1215
1089	delete d;	1216	delete d;
1090	break;	1217	break;
1091	}	1218	}
…		…
1095	break;	1222	break;
1096		1223
1097	case vpn_packet::PT_CONNECT_REQ:	1224	case vpn_packet::PT_CONNECT_REQ:
1098	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1225	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1099	{	1226	{
1100	connect_req_packet p = (connect_req_packet ) pkt;	1227	connect_req_packet p = (connect_req_packet )pkt;
1101		1228
1102	if (p->id > 0 && p->id <= vpn->conns.size ())	1229	if (p->id > 0 && p->id <= vpn->conns.size ())
1103	{	1230	{
1104	connection *c = vpn->conns[p->id - 1];	1231	connection *c = vpn->conns[p->id - 1];
1105	conf->protocols = p->protocols;	1232	conf->protocols = p->protocols;
1106		1233
1107	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]",	1234	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1235	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1236	p->protocols,
1108	conf->id, p->id, c->ictx && c->octx);	1237	c->ictx && c->octx);
1109		1238
1110	if (c->ictx && c->octx)	1239	if (c->ictx && c->octx)
1111	{	1240	{
1112	// send connect_info packets to both sides, in case one is	1241	// send connect_info packets to both sides, in case one is
1113	// behind a nat firewall (or both ;)	1242	// behind a nat firewall (or both ;)
…		…
1136		1265
1137	c->conf->protocols = p->protocols;	1266	c->conf->protocols = p->protocols;
1138	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1267	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1139	p->si.upgrade_protocol (protocol, c->conf);	1268	p->si.upgrade_protocol (protocol, c->conf);
1140		1269
1141	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1270	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1142	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1271	conf->nodename,
		1272	vpn->conns[p->id - 1]->conf->nodename,
		1273	(const char *)p->si,
		1274	p->protocols,
		1275	protocol,
		1276	p->si.supported_protocols (c->conf),
		1277	!c->ictx && !c->octx);
1143		1278
1144	const sockinfo &dsi = forward_si (p->si);	1279	const sockinfo &dsi = forward_si (p->si);
1145		1280
1146	if (dsi.valid ())	1281	if (dsi.valid ())
1147	c->send_auth_request (dsi, true);	1282	c->send_auth_request (dsi, true);
		1283	else
		1284	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1285	vpn->conns[p->id - 1]->conf->nodename,
		1286	(const char *)p->si);
1148	}	1287	}
1149	else	1288	else
1150	slog (L_WARN,	1289	slog (L_WARN,
1151	_("received authenticated connection request from unknown node #%d, config file mismatch?"),	1290	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
1152	p->id);	1291	p->id);
…		…
1158	send_reset (rsi);	1297	send_reset (rsi);
1159	break;	1298	break;
1160	}	1299	}
1161	}	1300	}
1162		1301
		1302	inline void
1163	void connection::keepalive_cb (ev::timer &w, int revents)	1303	connection::keepalive_cb (ev::timer &w, int revents)
1164	{	1304	{
1165	if (ev::ev_now () >= last_activity + ::conf.keepalive + 30)	1305	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1306
		1307	if (when >= 0)
		1308	w.start (when);
		1309	else if (when < -15)
1166	{	1310	{
1167	reset_connection ();	1311	reset_connection ();
1168	establish_connection ();	1312	establish_connection ();
1169	}	1313	}
1170	else if (ev::ev_now () < last_activity + ::conf.keepalive)
1171	w.start (last_activity + ::conf.keepalive - ev::now ());
1172	else if (conf->connectmode != conf_node::C_ONDEMAND	1314	else if (conf->connectmode != conf_node::C_ONDEMAND
1173	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1315	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1174	{	1316	{
		1317	w.start (3);
1175	send_ping (si);	1318	send_ping (si);
1176	w.start (5);
1177	}	1319	}
1178	else if (ev::ev_now () < last_activity + ::conf.keepalive + 10)	1320	else if (when >= -10)
1179	// hold ondemand connections implicitly a few seconds longer	1321	// hold ondemand connections implicitly a few seconds longer
1180	// should delete octx, though, or something like that ;)	1322	// should delete octx, though, or something like that ;)
1181	w.start (last_activity + ::conf.keepalive + 10 - ev::now ());	1323	w.start (when + 10);
1182	else	1324	else
1183	reset_connection ();	1325	reset_connection ();
1184	}	1326	}
1185		1327
		1328	void
1186	void connection::send_connect_request (int id)	1329	connection::send_connect_request (int id)
1187	{	1330	{
1188	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1331	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1189		1332
1190	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1333	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1334	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1335	THISNODE->protocols);
1191	p->hmac_set (octx);	1336	p->hmac_set (octx);
1192	send_vpn_packet (p, si);	1337	send_vpn_packet (p, si);
1193		1338
1194	delete p;	1339	delete p;
1195	}	1340	}
1196		1341
		1342	void
1197	void connection::script_init_env (const char *ext)	1343	connection::script_init_env (const char *ext)
1198	{	1344	{
1199	char *env;	1345	char *env;
1200	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);	1346	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1201	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);	1347	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1202	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,	1348	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1203	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,	1349	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1204	conf->id & 0xff); putenv (env);	1350	conf->id & 0xff); putenv (env);
1205	}	1351	}
1206		1352
		1353	void
1207	void connection::script_init_connect_env ()	1354	connection::script_init_connect_env ()
1208	{	1355	{
1209	vpn->script_init_env ();	1356	vpn->script_init_env ();
1210		1357
1211	char *env;	1358	char *env;
1212	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1359	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1360	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1213	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1361	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1214	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1362	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1215	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1363	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1216	}	1364	}
1217		1365
		1366	inline const char *
1218	const char *connection::script_node_up ()	1367	connection::script_node_up ()
1219	{	1368	{
1220	script_init_connect_env ();	1369	script_init_connect_env ();
1221		1370
1222	putenv ((char *)"STATE=up");	1371	putenv ((char *)"STATE=up");
1223		1372
…		…
1228	::conf.script_node_up ? ::conf.script_node_up : "node-up");	1377	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1229		1378
1230	return filename;	1379	return filename;
1231	}	1380	}
1232		1381
		1382	inline const char *
		1383	connection::script_node_change ()
		1384	{
		1385	script_init_connect_env ();
		1386
		1387	putenv ((char *)"STATE=change");
		1388
		1389	char *filename;
		1390	asprintf (&filename,
		1391	"%s/%s",
		1392	confbase,
		1393	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1394
		1395	return filename;
		1396	}
		1397
		1398	inline const char *
1233	const char *connection::script_node_down ()	1399	connection::script_node_down ()
1234	{	1400	{
1235	script_init_connect_env ();	1401	script_init_connect_env ();
1236		1402
1237	putenv ((char *)"STATE=down");	1403	putenv ((char *)"STATE=down");
1238		1404
…		…
1244		1410
1245	return filename;	1411	return filename;
1246	}	1412	}
1247		1413
1248	connection::connection (struct vpn vpn, conf_node conf)	1414	connection::connection (struct vpn vpn, conf_node conf)
1249	: vpn(vpn), conf(conf)	1415	: vpn(vpn), conf(conf),
1250	, rekey (this, &connection::rekey_cb)
1251	, keepalive (this, &connection::keepalive_cb)
1252	, establish_connection (this, &connection::establish_connection_cb)
1253	#if ENABLE_DNS	1416	#if ENABLE_DNS
1254	, dns (0)	1417	dns (0),
1255	#endif	1418	#endif
		1419	data_queue(conf->max_ttl, conf->max_queue + 1),
		1420	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1256	{	1421	{
		1422	rekey .set<connection, &connection::rekey_cb > (this);
		1423	keepalive .set<connection, &connection::keepalive_cb > (this);
		1424	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1425
		1426	last_establish_attempt = 0.;
1257	octx = ictx = 0;	1427	octx = ictx = 0;
1258	retry_cnt = 0;
1259		1428
1260	if (!conf->protocols) // make sure some protocol is enabled	1429	connectmode = conf->connectmode;
1261	conf->protocols = PROT_UDPv4;
1262		1430
1263	connectmode = conf_node::C_ALWAYS; // initial setting	1431	// queue a dummy packet to force an initial connection attempt
		1432	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1433	vpn_queue.put (new net_packet);
		1434
1264	reset_connection ();	1435	reset_connection ();
1265	}	1436	}
1266		1437
1267	connection::~connection ()	1438	connection::~connection ()
1268	{	1439	{
1269	shutdown ();	1440	shutdown ();
1270	}	1441	}
1271		1442
		1443	void
1272	void connection_init ()	1444	connection_init ()
1273	{	1445	{
1274	auth_rate_limiter.clear ();	1446	auth_rate_limiter.clear ();
1275	reset_rate_limiter.clear ();	1447	reset_rate_limiter.clear ();
1276	}	1448	}
1277		1449

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Comparing gvpe/src/connection.C (file contents): Revision 1.60 by pcg, Sat Nov 10 05:14:22 2007 UTC vs. Revision 1.106 by root, Fri Jul 19 21:01:16 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.60 by pcg, Sat Nov 10 05:14:22 2007 UTC vs.
Revision 1.106 by root, Fri Jul 19 21:01:16 2013 UTC