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

Comparing gvpe/src/connection.C (file contents):
Revision 1.59 by pcg, Mon Dec 5 12:58:09 2005 UTC vs.
Revision 1.112 by root, Fri Sep 12 10:40:43 2014 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
		38	#include <openssl/opensslv.h>
26	#include <openssl/rand.h>	39	#include <openssl/rand.h>
27	#include <openssl/evp.h>	40	#include <openssl/evp.h>
28	#include <openssl/rsa.h>	41	#include <openssl/rsa.h>
29	#include <openssl/err.h>	42	#include <openssl/err.h>
		43
		44	// openssl 0.9.8 compatibility
		45	#if OPENSSL_VERSION_NUMBER < 0x10100000
		46	#define require101(exp) exp
		47	#else
		48	#define require101(exp) require (exp)
		49	#endif
30		50
31	#include "conf.h"	51	#include "conf.h"
32	#include "slog.h"	52	#include "slog.h"
33	#include "device.h"	53	#include "device.h"
34	#include "vpn.h"	54	#include "vpn.h"
35	#include "connection.h"	55	#include "connection.h"
		56	#include "hkdf.h"
36		57
37	#include "netcompat.h"	58	#include "netcompat.h"
38		59
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	60	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
44		61
45	#define ULTRA_FAST 1	62	#define ULTRA_FAST 1
46	#define HLOG 15	63	#define HLOG 15
47	#include "lzf/lzf.h"	64	#include "lzf/lzf.h"
48	#include "lzf/lzf_c.c"	65	#include "lzf/lzf_c.c"
49	#include "lzf/lzf_d.c"	66	#include "lzf/lzf_d.c"
50		67
		68	//////////////////////////////////////////////////////////////////////////////
		69
		70	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		71	static ev::child rs_child_ev;
		72
		73	namespace
		74	{
		75	void // c++ requires external linkage here, apparently :(
		76	rs_child_cb (ev::child &w, int revents)
		77	{
		78	w.stop ();
		79
		80	if (rs_queue.empty ())
		81	return;
		82
		83	pid_t pid = run_script (*rs_queue.front ().first, false);
		84	if (pid)
		85	{
		86	w.set (pid);
		87	w.start ();
		88	}
		89	else
		90	slog (L_WARN, rs_queue.front ().second);
		91
		92	delete rs_queue.front ().first;
		93	rs_queue.pop ();
		94	}
		95	};
		96
		97	// despite the fancy name, this is quite a hack
		98	static void
		99	run_script_queued (run_script_cb cb, const char warnmsg)
		100	{
		101	rs_queue.push (std::make_pair (cb, warnmsg));
		102
		103	if (!rs_child_ev.is_active ())
		104	{
		105	rs_child_ev.set<rs_child_cb> ();
		106	rs_child_ev ();
		107	}
		108	}
		109
		110	//////////////////////////////////////////////////////////////////////////////
		111
51	struct crypto_ctx	112	struct crypto_ctx
52	{	113	{
53	EVP_CIPHER_CTX cctx;	114	EVP_CIPHER_CTX cctx;
54	HMAC_CTX hctx;	115	HMAC_CTX hctx;
55		116
56	crypto_ctx (const rsachallenge &challenge, int enc);	117	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
57	~crypto_ctx ();	118	~crypto_ctx ();
58	};	119	};
59		120
60	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	121	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
61	{	122	{
		123	ecdh_key s;
		124
		125	curve25519_combine (a, b, s);
		126
		127	{
		128	u8 mac_key[MAC_KEYSIZE];
		129	static const unsigned char mac_info[] = "gvpe mac key";
		130
		131	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		132	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		133	kdf.extract (s, sizeof (s));
		134	kdf.extract_done (HKDF_PRF_HASH ());
		135	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		136
		137	HMAC_CTX_init (&hctx);
		138	require101 (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		139	}
		140
		141	{
		142	u8 cipher_key[CIPHER_KEYSIZE];
		143	static const unsigned char cipher_info[] = "gvpe cipher key";
		144
		145	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		146	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		147	kdf.extract (s, sizeof (s));
		148	kdf.extract_done (HKDF_PRF_HASH ());
		149	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		150
62	EVP_CIPHER_CTX_init (&cctx);	151	EVP_CIPHER_CTX_init (&cctx);
63	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	152	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
64	HMAC_CTX_init (&hctx);	153	}
65	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
66	}	154	}
67		155
68	crypto_ctx::~crypto_ctx ()	156	crypto_ctx::~crypto_ctx ()
69	{	157	{
70	require (EVP_CIPHER_CTX_cleanup (&cctx));	158	require (EVP_CIPHER_CTX_cleanup (&cctx));
71	HMAC_CTX_cleanup (&hctx);	159	HMAC_CTX_cleanup (&hctx);
72	}	160	}
73		161
		162	static inline void
		163	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		164	{
		165	if (RSA_public_encrypt (sizeof (auth.rsa),
		166	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		167	key, RSA_PKCS1_OAEP_PADDING) < 0)
		168	fatal ("RSA_public_encrypt error");
		169
		170	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		171	}
		172
		173	static inline bool
		174	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		175	{
		176	u8 rsa_decrypt[RSA_KEYLEN];
		177
		178	if (RSA_private_decrypt (sizeof (encr.rsa),
		179	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		180	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		181	return 0;
		182
		183	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		184	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		185
		186	return 1;
		187	}
		188
74	static void	189	static void
75	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	190	auth_hash (const auth_data &auth, const ecdh_key &b, auth_mac &mac)
76	{	191	{
77	EVP_MD_CTX ctx;	192	hkdf kdf (b, sizeof b, AUTH_DIGEST ()); // use response ecdh b as salt
78		193	kdf.extract (&auth.rsa, sizeof (auth.rsa));
79	EVP_MD_CTX_init (&ctx);	194	kdf.extract_done ();
80	require (EVP_DigestInit (&ctx, RSA_HASH));	195	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	}	196	}
86		197
87	struct rsa_entry {	198	void
88	tstamp expire;	199	connection::generate_auth_data ()
89	rsaid id;
90	rsachallenge chg;
91	};
92
93	struct rsa_cache : list<rsa_entry>
94	{	200	{
95	void cleaner_cb (time_watcher &w); time_watcher cleaner;	201	if (auth_expire < ev_now ())
96
97	bool find (const rsaid &id, rsachallenge &chg)
98	{
99	for (iterator i = begin (); i != end (); ++i)
100	{	202	{
101	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)	203	// request data
102	{	204	rand_fill (snd_auth.rsa);
103	memcpy (&chg, &i->chg, sizeof chg);	205	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
104		206
105	erase (i);	207	// eventual response data
106	return true;	208	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
107	}
108	}	209	}
109		210
110	if (cleaner.at < NOW)	211	// every use prolongs the expiry
111	cleaner.start (NOW + RSA_TTL);	212	auth_expire = ev_now () + AUTH_TTL;
112
113	return false;
114	}
115
116	void gen (rsaid &id, rsachallenge &chg)
117	{
118	rsa_entry e;
119
120	RAND_bytes ((unsigned char *)&id, sizeof id);
121	RAND_bytes ((unsigned char *)&chg, sizeof chg);
122
123	e.expire = NOW + RSA_TTL;
124	e.id = id;
125	memcpy (&e.chg, &chg, sizeof chg);
126
127	push_back (e);
128
129	if (cleaner.at < NOW)
130	cleaner.start (NOW + RSA_TTL);
131	}
132
133	rsa_cache ()
134	: cleaner (this, &rsa_cache::cleaner_cb)
135	{ }
136
137	} rsa_cache;
138
139	void rsa_cache::cleaner_cb (time_watcher &w)
140	{
141	if (!empty ())
142	{
143	w.start (NOW + RSA_TTL);
144
145	for (iterator i = begin (); i != end (); )
146	if (i->expire <= NOW)
147	i = erase (i);
148	else
149	++i;
150	}
151	}	213	}
152		214
153	//////////////////////////////////////////////////////////////////////////////	215	//////////////////////////////////////////////////////////////////////////////
154		216
155	void pkt_queue::put (net_packet *p)	217	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		218	: max_ttl (max_ttl), max_queue (max_queue)
156	{	219	{
157	if (queue[i])	220	queue = new pkt [max_queue];
158	{
159	delete queue[i];
160	j = (j + 1) % QUEUEDEPTH;
161	}
162		221
163	queue[i] = p;
164
165	i = (i + 1) % QUEUEDEPTH;
166	}
167
168	net_packet *pkt_queue::get ()
169	{
170	net_packet *p = queue[j];
171
172	if (p)
173	{
174	queue[j] = 0;
175	j = (j + 1) % QUEUEDEPTH;
176	}
177
178	return p;
179	}
180
181	pkt_queue::pkt_queue ()
182	{
183	memset (queue, 0, sizeof (queue));
184	i = 0;	222	i = 0;
185	j = 0;	223	j = 0;
		224
		225	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
186	}	226	}
187		227
188	pkt_queue::~pkt_queue ()	228	pkt_queue::~pkt_queue ()
189	{	229	{
190	for (i = QUEUEDEPTH; --i > 0; )	230	while (net_packet *p = get ())
		231	delete p;
		232
191	delete queue[i];	233	delete [] queue;
192	}	234	}
193		235
		236	void
		237	pkt_queue::expire_cb (ev::timer &w, int revents)
		238	{
		239	ev_tstamp expire = ev_now () - max_ttl;
		240
		241	for (;;)
		242	{
		243	if (empty ())
		244	break;
		245
		246	double diff = queue[j].tstamp - expire;
		247
		248	if (diff >= 0.)
		249	{
		250	w.start (diff > 0.5 ? diff : 0.5);
		251	break;
		252	}
		253
		254	delete get ();
		255	}
		256	}
		257
		258	void
		259	pkt_queue::put (net_packet *p)
		260	{
		261	ev_tstamp now = ev_now ();
		262
		263	// start expiry timer
		264	if (empty ())
		265	expire.start (max_ttl);
		266
		267	int ni = i + 1 == max_queue ? 0 : i + 1;
		268
		269	if (ni == j)
		270	delete get ();
		271
		272	queue[i].pkt = p;
		273	queue[i].tstamp = now;
		274
		275	i = ni;
		276	}
		277
		278	net_packet *
		279	pkt_queue::get ()
		280	{
		281	if (empty ())
		282	return 0;
		283
		284	net_packet *p = queue[j].pkt;
		285	queue[j].pkt = 0;
		286
		287	j = j + 1 == max_queue ? 0 : j + 1;
		288
		289	return p;
		290	}
		291
194	struct net_rateinfo {	292	struct net_rateinfo
		293	{
195	u32 host;	294	u32 host;
196	double pcnt, diff;	295	double pcnt, diff;
197	tstamp last;	296	tstamp last;
198	};	297	};
199		298
209		308
210	bool can (const sockinfo &si) { return can((u32)si.host); }	309	bool can (const sockinfo &si) { return can((u32)si.host); }
211	bool can (u32 host);	310	bool can (u32 host);
212	};	311	};
213		312
214	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	313	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
215		314
		315	bool
216	bool net_rate_limiter::can (u32 host)	316	net_rate_limiter::can (u32 host)
217	{	317	{
218	iterator i;	318	iterator i;
219		319
220	for (i = begin (); i != end (); )	320	for (i = begin (); i != end (); )
221	if (i->host == host)	321	if (i->host == host)
222	break;	322	break;
223	else if (i->last < NOW - NRL_EXPIRE)	323	else if (i->last < ev_now () - NRL_EXPIRE)
224	i = erase (i);	324	i = erase (i);
225	else	325	else
226	i++;	326	i++;
227		327
228	if (i == end ())	328	if (i == end ())
…		…
230	net_rateinfo ri;	330	net_rateinfo ri;
231		331
232	ri.host = host;	332	ri.host = host;
233	ri.pcnt = 1.;	333	ri.pcnt = 1.;
234	ri.diff = NRL_MAXDIF;	334	ri.diff = NRL_MAXDIF;
235	ri.last = NOW;	335	ri.last = ev_now ();
236		336
237	push_front (ri);	337	push_front (ri);
238		338
239	return true;	339	return true;
240	}	340	}
…		…
242	{	342	{
243	net_rateinfo ri (*i);	343	net_rateinfo ri (*i);
244	erase (i);	344	erase (i);
245		345
246	ri.pcnt = ri.pcnt * NRL_ALPHA;	346	ri.pcnt = ri.pcnt * NRL_ALPHA;
247	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	347	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
248		348
249	ri.last = NOW;	349	ri.last = ev_now ();
250		350
251	double dif = ri.diff / ri.pcnt;	351	double dif = ri.diff / ri.pcnt;
252		352
253	bool send = dif > NRL_CUTOFF;	353	bool send = dif > NRL_CUTOFF;
254		354
…		…
266	}	366	}
267	}	367	}
268		368
269	/////////////////////////////////////////////////////////////////////////////	369	/////////////////////////////////////////////////////////////////////////////
270		370
271	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	371	void
272
273	void hmac_packet::hmac_gen (crypto_ctx *ctx)	372	hmac_packet::hmac_gen (crypto_ctx ctx, u8 hmac_digest)
274	{	373	{
275	unsigned int xlen;
276
277	HMAC_CTX *hctx = &ctx->hctx;	374	HMAC_CTX *hctx = &ctx->hctx;
278		375
279	HMAC_Init_ex (hctx, 0, 0, 0, 0);	376	require101 (HMAC_Init_ex (hctx, 0, 0, 0, 0));
280	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	377	require101 (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), len - sizeof (hmac_packet)));
281	len - sizeof (hmac_packet));	378	require101 (HMAC_Final (hctx, hmac_digest, 0));
282	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);
283	}	379	}
284		380
285	void	381	void
286	hmac_packet::hmac_set (crypto_ctx *ctx)	382	hmac_packet::hmac_set (crypto_ctx *ctx)
287	{	383	{
288	hmac_gen (ctx);	384	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
289		385	hmac_gen (ctx, hmac_digest);
290	memcpy (hmac, hmac_digest, HMACLENGTH);	386	memcpy (hmac, hmac_digest, HMACLENGTH);
291	}	387	}
292		388
293	bool	389	bool
294	hmac_packet::hmac_chk (crypto_ctx *ctx)	390	hmac_packet::hmac_chk (crypto_ctx *ctx)
295	{	391	{
296	hmac_gen (ctx);	392	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
297		393	hmac_gen (ctx, hmac_digest);
298	return !memcmp (hmac, hmac_digest, HMACLENGTH);	394	return slow_memeq (hmac, hmac_digest, HMACLENGTH);
299	}	395	}
300		396
		397	void
301	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	398	vpn_packet::set_hdr (ptype type_, unsigned int dst)
302	{	399	{
303	type = type_;	400	type = type_;
304		401
305	int src = THISNODE->id;	402	int src = THISNODE->id;
306		403
…		…
311		408
312	#define MAXVPNDATA (MAX_MTU - 6 - 6)	409	#define MAXVPNDATA (MAX_MTU - 6 - 6)
313	#define DATAHDR (sizeof (u32) + RAND_SIZE)	410	#define DATAHDR (sizeof (u32) + RAND_SIZE)
314		411
315	struct vpndata_packet : vpn_packet	412	struct vpndata_packet : vpn_packet
		413	{
		414	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		415
		416	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		417	tap_packet unpack (connection conn, u32 &seqno);
		418
		419	private:
		420	const u32 data_hdr_size () const
316	{	421	{
317	u8 data[MAXVPNDATA + DATAHDR]; // seqno
318
319	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
320	tap_packet unpack (connection conn, u32 &seqno);
321	private:
322
323	const u32 data_hdr_size () const
324	{
325	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	422	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
326	}
327	};	423	}
		424	};
328		425
329	void	426	void
330	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	427	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
331	{	428	{
332	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	429	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
334	ptype type = PT_DATA_UNCOMPRESSED;	431	ptype type = PT_DATA_UNCOMPRESSED;
335		432
336	#if ENABLE_COMPRESSION	433	#if ENABLE_COMPRESSION
337	u8 cdata[MAX_MTU];	434	u8 cdata[MAX_MTU];
338		435
339	if (conn->features & ENABLE_COMPRESSION)	436	if (conn->features & FEATURE_COMPRESSION)
340	{	437	{
341	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	438	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
342		439
343	if (cl)	440	if (cl)
344	{	441	{
…		…
350	d[1] = cl;	447	d[1] = cl;
351	}	448	}
352	}	449	}
353	#endif	450	#endif
354		451
355	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	452	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
356		453
357	struct {	454	struct {
358	#if RAND_SIZE	455	#if RAND_SIZE
359	u8 rnd[RAND_SIZE];	456	u8 rnd[RAND_SIZE];
360	#endif	457	#endif
361	u32 seqno;	458	u32 seqno;
362	} datahdr;	459	} datahdr;
363		460
364	datahdr.seqno = ntohl (seqno);	461	datahdr.seqno = ntohl (seqno);
365	#if RAND_SIZE	462	#if RAND_SIZE
366	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	463	// NB: a constant (per session) random prefix
		464	// is likely enough, but we don't take any chances.
		465	conn->oiv.get (datahdr.rnd, RAND_SIZE);
367	#endif	466	#endif
368		467
369	require (EVP_EncryptUpdate (cctx,	468	require (EVP_EncryptUpdate (cctx,
370	(unsigned char *) data + outl, &outl2,	469	(unsigned char *) data + outl, &outl2,
371	(unsigned char *) &datahdr, DATAHDR));	470	(unsigned char *) &datahdr, DATAHDR));
…		…
393	int outl = 0, outl2;	492	int outl = 0, outl2;
394	tap_packet *p = new tap_packet;	493	tap_packet *p = new tap_packet;
395	u8 *d;	494	u8 *d;
396	u32 l = len - data_hdr_size ();	495	u32 l = len - data_hdr_size ();
397		496
398	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	497	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
399		498
400	#if ENABLE_COMPRESSION	499	#if ENABLE_COMPRESSION
401	u8 cdata[MAX_MTU];	500	u8 cdata[MAX_MTU];
402		501
403	if (type == PT_DATA_COMPRESSED)	502	if (type == PT_DATA_COMPRESSED)
404	d = cdata;	503	d = cdata;
405	else	504	else
406	#endif	505	#endif
407	d = &(*p)[6 + 6 - DATAHDR];	506	d = &(*p)[6 + 6] - DATAHDR;
408		507
409	/* this overwrites part of the src mac, but we fix that later */	508	// we play do evil games with the struct layout atm.
		509	// pending better solutions, we at least do some verification.
		510	// this is fine, as we left ISO territory long ago.
		511	require (DATAHDR <= 16);
		512	require ((u8 )(&p->len + 1) == &(p)[0]);
		513
		514	// this can overwrite the len/dst/src fields
410	require (EVP_DecryptUpdate (cctx,	515	require (EVP_DecryptUpdate (cctx,
411	d, &outl2,	516	d, &outl2,
412	(unsigned char *)&data, len - data_hdr_size ()));	517	(unsigned char *)&data, len - data_hdr_size ()));
413	outl += outl2;	518	outl += outl2;
414		519
…		…
445	}	550	}
446	};	551	};
447		552
448	struct config_packet : vpn_packet	553	struct config_packet : vpn_packet
449	{	554	{
450	// actually, hmaclen cannot be checked because the hmac	555	u8 serial[SERIAL_SIZE];
451	// field comes before this data, so peers with other
452	// hmacs simply will not work.
453	u8 prot_major, prot_minor, randsize, hmaclen;	556	u8 prot_major, prot_minor, randsize;
454	u8 flags, challengelen, features, pad3;	557	u8 flags, features, pad6, pad7, pad8;
455	u32 cipher_nid, digest_nid, hmac_nid;	558	u32 cipher_nid, mac_nid, auth_nid;
456		559
457	void setup (ptype type, int dst);	560	void setup (ptype type, int dst);
458	bool chk_config () const;	561	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
459		562
460	static u8 get_features ()	563	static u8 get_features ()
461	{	564	{
462	u8 f = 0;	565	u8 f = 0;
463	#if ENABLE_COMPRESSION	566	#if ENABLE_COMPRESSION
…		…
471	#endif	574	#endif
472	return f;	575	return f;
473	}	576	}
474	};	577	};
475		578
		579	void
476	void config_packet::setup (ptype type, int dst)	580	config_packet::setup (ptype type, int dst)
477	{	581	{
478	prot_major = PROTOCOL_MAJOR;	582	prot_major = PROTOCOL_MAJOR;
479	prot_minor = PROTOCOL_MINOR;	583	prot_minor = PROTOCOL_MINOR;
480	randsize = RAND_SIZE;	584	randsize = RAND_SIZE;
481	hmaclen = HMACLENGTH;
482	flags = 0;	585	flags = 0;
483	challengelen = sizeof (rsachallenge);
484	features = get_features ();	586	features = get_features ();
485		587
		588	strncpy ((char *)serial, conf.serial, sizeof (serial));
		589
486	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	590	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
487	digest_nid = htonl (EVP_MD_type (RSA_HASH));
488	hmac_nid = htonl (EVP_MD_type (DIGEST));	591	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		592	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
489		593
490	len = sizeof (*this) - sizeof (net_packet);	594	len = sizeof (*this) - sizeof (net_packet);
491	set_hdr (type, dst);	595	set_hdr (type, dst);
492	}	596	}
493		597
494	bool config_packet::chk_config () const	598	bool
		599	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
495	{	600	{
496	if (prot_major != PROTOCOL_MAJOR)	601	if (prot_major != PROTOCOL_MAJOR)
497	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	602	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		603	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
498	else if (randsize != RAND_SIZE)	604	else if (randsize != RAND_SIZE)
499	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	605	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
500	else if (hmaclen != HMACLENGTH)	606	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
501	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
502	else if (challengelen != sizeof (rsachallenge))
503	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
504	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	607	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
505	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	608	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
506	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	609	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
507	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
508	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	610	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
509	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	611	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		612	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		613	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		614	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		615	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
510	else	616	else
		617	{
		618	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		619
		620	if (cmp > 0)
		621	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		622	conf->nodename, (const char *)rsi);
		623	else if (cmp == 0)
511	return true;	624	return true;
		625	}
512		626
513	return false;	627	return false;
514	}	628	}
515		629
516	struct auth_req_packet : config_packet	630	struct auth_req_packet : config_packet // UNPROTECTED
517	{	631	{
518	char magic[8];	632	char magic[8];
519	u8 initiate; // false if this is just an automatic reply	633	u8 initiate; // false if this is just an automatic reply
520	u8 protocols; // supported protocols (will be patched on forward)	634	u8 protocols; // supported protocols (will be patched on forward)
521	u8 pad2, pad3;	635	u8 pad2, pad3;
522	rsaid id;	636	auth_encr encr;
523	rsaencrdata encr;
524		637
525	auth_req_packet (int dst, bool initiate_, u8 protocols_)	638	auth_req_packet (int dst, bool initiate_, u8 protocols_)
526	{	639	{
527	config_packet::setup (PT_AUTH_REQ, dst);	640	config_packet::setup (PT_AUTH_REQ, dst);
528	strncpy (magic, MAGIC, 8);	641	memcpy (magic, MAGIC, 8);
529	initiate = !!initiate_;	642	initiate = !!initiate_;
530	protocols = protocols_;	643	protocols = protocols_;
531		644
532	len = sizeof (*this) - sizeof (net_packet);	645	len = sizeof (*this) - sizeof (net_packet);
533	}	646	}
534	};	647	};
535		648
536	struct auth_res_packet : config_packet	649	struct auth_res_packet : vpn_packet // UNPROTECTED
537	{	650	{
538	rsaid id;
539	u8 pad1, pad2, pad3;
540	u8 response_len; // encrypted length
541	rsaresponse response;	651	auth_response response;
542		652
543	auth_res_packet (int dst)	653	auth_res_packet (int dst)
544	{	654	{
545	config_packet::setup (PT_AUTH_RES, dst);	655	set_hdr (PT_AUTH_RES, dst);
546		656
547	len = sizeof (*this) - sizeof (net_packet);	657	len = sizeof (*this) - sizeof (net_packet);
548	}	658	}
549	};	659	};
550		660
…		…
580	};	690	};
581		691
582	/////////////////////////////////////////////////////////////////////////////	692	/////////////////////////////////////////////////////////////////////////////
583		693
584	void	694	void
585	connection::connection_established ()	695	connection::connection_established (const sockinfo &rsi)
586	{	696	{
587	if (ictx && octx)	697	if (!have_snd_auth \|\| !have_rcv_auth)
		698	return;
		699
		700	si = rsi;
		701	protocol = rsi.prot;
		702
		703	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		704	conf->nodename, (const char *)rsi,
		705	vpn->can_direct (THISNODE, conf) ? "direct" : "forwarded",
		706	PROTOCOL_MAJOR, prot_minor);
		707
		708	if (::conf.script_node_up)
		709	{
		710	run_script_cb *cb = new run_script_cb;
		711	cb->set<connection, &connection::script_node_up> (this);
		712	run_script_queued (cb, _("node-up command execution failed, continuing."));
588	{	713	}
589	connectmode = conf->connectmode;	714
		715	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		716	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
590		717
		718	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		719	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		720
		721	oiv.reset ();
		722
591	// make sure rekeying timeouts are slightly asymmetric	723	// make sure rekeying timeouts are slightly asymmetric
592	rekey.start (NOW + ::conf.rekey	724	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
593	+ (conf->id > THISNODE->id ? 10 : 0));	725	rekey.start (rekey_interval, rekey_interval);
		726
		727	hmac_error = 0.;
		728
594	keepalive.start (NOW + ::conf.keepalive);	729	keepalive.start (::conf.keepalive);
595		730
596	// send queued packets	731	// send queued packets
597	if (ictx && octx)
598	{
599	while (tap_packet p = (tap_packet )data_queue.get ())	732	while (tap_packet p = (tap_packet )data_queue.get ())
600	{	733	{
601	send_data_packet (p);	734	if (p->len) send_data_packet (p);
602	delete p;	735	delete p;
603	}	736	}
604		737
605	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	738	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
606	{	739	{
607	send_vpn_packet (p, si, IPTOS_RELIABILITY);	740	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
608	delete p;	741	delete p;
609	}
610	}
611	}	742	}
		743
		744	vpn->connection_established (this);
		745	}
		746
		747	void
		748	connection::reset_si ()
		749	{
		750	if (vpn->can_direct (THISNODE, conf))
		751	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
612	else	752	else
613	{	753	{
614	retry_cnt = 0;
615	establish_connection.start (NOW + 5);
616	keepalive.stop ();
617	rekey.stop ();
618	}
619	}
620
621	void
622	connection::reset_si ()
623	{
624	protocol = best_protocol (THISNODE->protocols & conf->protocols);
625
626	// mask out protocols we cannot establish
627	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
628	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
629	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
630
631	if (protocol
632	&& (!conf->can_direct (THISNODE)
633	\|\| !THISNODE->can_direct (conf)))
634	{
635	slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename);	754	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
636	protocol = 0;	755	protocol = 0;
637	}	756	}
638		757
639	si.set (conf, protocol);	758	si.set (conf, protocol);
640	}	759	}
…		…
643	const sockinfo &	762	const sockinfo &
644	connection::forward_si (const sockinfo &si) const	763	connection::forward_si (const sockinfo &si) const
645	{	764	{
646	if (!si.valid ())	765	if (!si.valid ())
647	{	766	{
648	connection *r = vpn->find_router ();	767	connection *r = vpn->find_router_for (this);
649		768
650	if (r)	769	if (r)
651	{	770	{
652	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	771	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
653	conf->nodename, r->conf->nodename, (const char *)r->si);	772	conf->nodename, r->conf->nodename);
654	return r->si;	773	return r->si;
655	}	774	}
656	else	775	else
657	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	776	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
658	conf->nodename);	777	conf->nodename);
659	}	778	}
660		779
661	return si;	780	return si;
662	}	781	}
663		782
664	void	783	void
665	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	784	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
666	{	785	{
667	if (!vpn->send_vpn_packet (pkt, si, tos))	786	if (!vpn->send_vpn_packet (pkt, si, tos))
668	reset_connection ();	787	reset_connection ("packet send error");
669	}	788	}
670		789
671	void	790	void
672	connection::send_ping (const sockinfo &si, u8 pong)	791	connection::send_ping (const sockinfo &si, u8 pong)
673	{	792	{
674	ping_packet *pkt = new ping_packet;	793	ping_packet *pkt = new ping_packet;
675		794
676	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	795	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		796
		797	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
677	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	798	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
678		799
679	delete pkt;	800	delete pkt;
680	}	801	}
681		802
…		…
696	void	817	void
697	connection::send_auth_request (const sockinfo &si, bool initiate)	818	connection::send_auth_request (const sockinfo &si, bool initiate)
698	{	819	{
699	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	820	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
700		821
701	rsachallenge chg;	822	generate_auth_data ();
702	rsa_cache.gen (pkt->id, chg);
703	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	823	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
704		824
705	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	825	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
706
707	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	826	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
708		827
709	delete pkt;	828	delete pkt;
710	}	829	}
711		830
712	void	831	void
713	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	832	connection::send_auth_response (const sockinfo &si)
714	{	833	{
715	auth_res_packet *pkt = new auth_res_packet (conf->id);	834	auth_res_packet *pkt = new auth_res_packet (conf->id);
716		835
717	pkt->id = id;	836	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof rcv_ecdh_b);
		837	auth_hash (rcv_auth, rcv_ecdh_b, pkt->response.mac);
718		838
719	rsa_hash (id, chg, pkt->response);
720
721	pkt->hmac_set (octx);
722
723	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	839	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
724
725	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	840	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
726		841
727	delete pkt;	842	delete pkt;
728	}	843	}
729		844
730	void	845	void
731	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	846	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
732	{	847	{
733	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)",	848	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
734	conf->id, rid, (const char *)rsi);	849	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		850	conf->protocols);
735		851
736	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	852	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
737		853
738	r->hmac_set (octx);	854	r->hmac_set (octx);
739	send_vpn_packet (r, si);	855	send_vpn_packet (r, si);
740		856
741	delete r;	857	delete r;
742	}	858	}
743		859
744	void	860	inline void
745	connection::establish_connection_cb (time_watcher &w)	861	connection::establish_connection_cb (ev::timer &w, int revents)
746	{	862	{
747	if (!ictx	863	if (!(ictx && octx)
748	&& conf != THISNODE	864	&& conf != THISNODE
749	&& connectmode != conf_node::C_NEVER	865	&& connectmode != conf_node::C_NEVER
750	&& connectmode != conf_node::C_DISABLED	866	&& connectmode != conf_node::C_DISABLED
751	&& NOW > w.at)	867	&& !w.is_active ())
752	{	868	{
753	w.at = TSTAMP_MAX; // first disable this watcher in case of recursion	869	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		870	// and stop trying. should probably be handled by a per-connection expire handler.
		871	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		872	{
		873	reset_connection ("no demand");
		874	return;
		875	}
754		876
755	double retry_int = double (retry_cnt & 3	877	last_establish_attempt = ev_now ();
		878
		879	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
756	? (retry_cnt & 3) + 1	880	? (retry_cnt & 3) + 1
757	: 1 << (retry_cnt >> 2));	881	: 1 << (retry_cnt >> 2));
758		882
759	reset_si ();	883	reset_si ();
760		884
761	bool slow = si.prot & PROT_SLOW;	885	bool slow = (si.prot & PROT_SLOW) \|\| (conf->low_power \|\| THISNODE->low_power);
762		886
763	if (si.prot && !si.host)	887	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		888	{
		889	/TODO/ /* start the timer so we don't recurse endlessly */
		890	w.start (1);
764	vpn->send_connect_request (conf->id);	891	vpn->send_connect_request (this);
		892	}
765	else	893	else
766	{	894	{
		895	if (si.valid ())
		896	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		897	conf->nodename, (const char *)si);
		898
767	const sockinfo &dsi = forward_si (si);	899	const sockinfo &dsi = forward_si (si);
768		900
769	slow = slow \|\| (dsi.prot & PROT_SLOW);	901	slow = slow \|\| (dsi.prot & PROT_SLOW);
770		902
771	if (dsi.valid () && auth_rate_limiter.can (dsi))	903	if (dsi.valid () && auth_rate_limiter.can (dsi))
772	{	904	{
773	if (retry_cnt < 4)	905	// use ping after the first few retries
		906	// TODO: on rekeys, the other node might not interpret ping correctly,
		907	// TODO: as it will still have a valid connection
		908	if (retry_cnt < 4 && (!conf->low_power \|\| THISNODE->low_power))
774	send_auth_request (dsi, true);	909	send_auth_request (dsi, true);
775	else	910	else
776	send_ping (dsi, 0);	911	send_ping (dsi, 0);
777	}	912	}
778	}	913	}
779		914
780	retry_int *= slow ? 8. : 0.7;	915	retry_int *= slow ? 4. : 0.9;
781		916
782	if (retry_int < conf->max_retry)	917	if (retry_int < conf->max_retry)
783	retry_cnt++;	918	retry_cnt++;
784	else	919	else
785	retry_int = conf->max_retry;	920	retry_int = conf->max_retry;
786		921
787	w.start (NOW + retry_int);	922	w.start (retry_int);
788	}	923	}
789	}	924	}
790		925
791	void	926	void
792	connection::reset_connection ()	927	connection::reset_connection (const char *reason)
793	{	928	{
794	if (ictx && octx)	929	if (ictx && octx)
795	{	930	{
796	slog (L_INFO, _("%s(%s): connection lost"),	931	slog (L_INFO, _("%s(%s): connection lost (%s)"),
797	conf->nodename, (const char *)si);	932	conf->nodename, (const char *)si, reason);
798		933
799	if (::conf.script_node_down)	934	if (::conf.script_node_down)
800	if (!run_script (run_script_cb (this, &connection::script_node_down), false))	935	{
		936	run_script_cb *cb = new run_script_cb;
		937	cb->set<connection, &connection::script_node_down> (this);
801	slog (L_WARN, _("node-down command execution failed, continuing."));	938	run_script_queued (cb, _("node-down command execution failed, continuing."));
		939	}
802	}	940	}
803		941
804	delete ictx; ictx = 0;	942	delete ictx; ictx = 0;
805	delete octx; octx = 0;	943	delete octx; octx = 0;
806	#if ENABLE_DNS
807	dnsv4_reset_connection ();
808	#endif
809		944
810	si.host = 0;	945	si.host = 0;
811		946
		947	have_snd_auth = false;
		948	have_rcv_auth = false;
		949	auth_expire = 0.;
		950
812	last_activity = 0;	951	last_activity = 0.;
		952	//last_si_change = 0.;
813	retry_cnt = 0;	953	retry_cnt = 0;
814		954
815	rekey.stop ();	955	rekey.stop ();
816	keepalive.stop ();	956	keepalive.stop ();
817	establish_connection.stop ();	957	establish_connection.stop ();
…		…
821	connection::shutdown ()	961	connection::shutdown ()
822	{	962	{
823	if (ictx && octx)	963	if (ictx && octx)
824	send_reset (si);	964	send_reset (si);
825		965
826	reset_connection ();	966	reset_connection ("shutdown");
827	}	967	}
828		968
829	void	969	// poor-man's rekeying
830	connection::rekey_cb (time_watcher &w)	970	inline void
		971	connection::rekey_cb (ev::timer &w, int revents)
831	{	972	{
832	reset_connection ();	973	reset_connection ("rekeying");
833	establish_connection ();	974	establish_connection ();
834	}	975	}
835		976
836	void	977	void
837	connection::send_data_packet (tap_packet *pkt)	978	connection::send_data_packet (tap_packet *pkt)
…		…
851	if (oseqno > MAX_SEQNO)	992	if (oseqno > MAX_SEQNO)
852	rekey ();	993	rekey ();
853	}	994	}
854		995
855	void	996	void
		997	connection::post_inject_queue ()
		998	{
		999	// force a connection every now and when when packets are sent (max 1/s)
		1000	if (ev_now () - last_establish_attempt >= (conf->low_power \|\| THISNODE->low_power ? 2.95 : 0.95)) // arbitrary
		1001	establish_connection.stop ();
		1002
		1003	establish_connection ();
		1004	}
		1005
		1006	void
856	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1007	connection::inject_data_packet (tap_packet *pkt)
857	{	1008	{
858	if (ictx && octx)	1009	if (ictx && octx)
859	send_data_packet (pkt);	1010	send_data_packet (pkt);
860	else	1011	else
861	{	1012	{
862	if (!broadcast)
863	data_queue.put (new tap_packet (*pkt));	1013	data_queue.put (new tap_packet (*pkt));
864		1014	post_inject_queue ();
865	establish_connection ();
866	}	1015	}
867	}	1016	}
868		1017
		1018	void
869	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1019	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
870	{	1020	{
871	if (ictx && octx)	1021	if (ictx && octx)
872	send_vpn_packet (pkt, si, tos);	1022	send_vpn_packet (pkt, si, tos);
873	else	1023	else
874	{	1024	{
875	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1025	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
876		1026	post_inject_queue ();
877	establish_connection ();
878	}	1027	}
879	}	1028	}
880		1029
881	void	1030	void
882	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1031	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
883	{	1032	{
884	last_activity = NOW;	1033	last_activity = ev_now ();
885		1034
886	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1035	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
887	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1036	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1037
		1038	if (connectmode == conf_node::C_DISABLED)
		1039	return;
888		1040
889	switch (pkt->typ ())	1041	switch (pkt->typ ())
890	{	1042	{
891	case vpn_packet::PT_PING:	1043	case vpn_packet::PT_PING:
		1044	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1045
892	// we send pings instead of auth packets after some retries,	1046	// we send pings instead of auth packets after some retries,
893	// so reset the retry counter and establish a connection	1047	// so reset the retry counter and establish a connection
894	// when we receive a ping.	1048	// when we receive a ping.
895	if (!ictx)	1049	if (!ictx)
896	{	1050	{
897	if (auth_rate_limiter.can (rsi))	1051	if (auth_rate_limiter.can (rsi))
898	send_auth_request (rsi, true);	1052	send_auth_request (rsi, true);
899	}	1053	}
900	else	1054	else
		1055	// we would love to change the socket address here, but ping's aren't
		1056	// authenticated, so we best ignore it.
901	send_ping (rsi, 1); // pong	1057	send_ping (rsi, 1); // pong
902		1058
903	break;	1059	break;
904		1060
905	case vpn_packet::PT_PONG:	1061	case vpn_packet::PT_PONG:
		1062	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1063
		1064	// a PONG might mean that the other side doesn't really know
		1065	// about our desire for communication.
		1066	establish_connection ();
906	break;	1067	break;
907		1068
908	case vpn_packet::PT_RESET:	1069	case vpn_packet::PT_RESET:
		1070	slog (L_TRACE, "%s >> PT_RESET", conf->nodename);
		1071
		1072	if (ictx && octx)
909	{	1073	{
910	reset_connection ();	1074	reset_connection ("remote reset");
911		1075
912	config_packet p = (config_packet ) pkt;	1076	config_packet p = (config_packet ) pkt;
913		1077
914	if (!p->chk_config ())	1078	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
915	{
916	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
917	conf->nodename, (const char *)rsi);
918	connectmode = conf_node::C_DISABLED;
919	}
920	else if (connectmode == conf_node::C_ALWAYS)
921	establish_connection ();	1079	establish_connection ();
922	}	1080	}
		1081
923	break;	1082	break;
924		1083
925	case vpn_packet::PT_AUTH_REQ:	1084	case vpn_packet::PT_AUTH_REQ:
926	if (auth_rate_limiter.can (rsi))	1085	if (auth_rate_limiter.can (rsi))
927	{	1086	{
928	auth_req_packet p = (auth_req_packet ) pkt;	1087	auth_req_packet p = (auth_req_packet )pkt;
929		1088
930	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1089	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1090	conf->nodename, p->initiate ? "initiate" : "reply",
		1091	p->protocols, p->features);
931		1092
932	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1093	if (memcmp (p->magic, MAGIC, 8))
		1094	{
		1095	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1096	conf->nodename, (const char *)rsi);
		1097	}
		1098	else if (p->chk_config (conf, rsi))
933	{	1099	{
934	if (p->prot_minor != PROTOCOL_MINOR)	1100	if (p->prot_minor != PROTOCOL_MINOR)
935	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1101	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
936	conf->nodename, (const char *)rsi,	1102	conf->nodename, (const char *)rsi,
937	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1103	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
938		1104
939	if (p->initiate)	1105	if (p->initiate)
		1106	{
940	send_auth_request (rsi, false);	1107	send_auth_request (rsi, false);
941		1108
942	rsachallenge k;	1109	if (ictx && octx)
		1110	reset_connection ("reconnect");
		1111	}
943		1112
		1113	auth_data auth;
		1114
944	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1115	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
945	{	1116	{
946	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1117	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
947	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1118	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
948	break;
949	}	1119	}
950	else	1120	else
951	{	1121	{
952	delete octx;	1122	bool chg = !have_rcv_auth \|\| !slow_memeq (&rcv_auth, &auth, sizeof auth);
953		1123
954	octx = new crypto_ctx (k, 1);	1124	rcv_auth = auth;
955	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1125	have_rcv_auth = true;
956		1126
		1127	send_auth_response (rsi);
		1128
		1129	if (chg)
		1130	{
957	conf->protocols = p->protocols;	1131	conf->protocols = p->protocols;
958	features = p->features & config_packet::get_features ();	1132	features = p->features & config_packet::get_features ();
959		1133
960	send_auth_response (rsi, p->id, k);
961
962	connection_established ();	1134	connection_established (rsi);
963
964	break;	1135	}
965	}	1136	}
		1137
		1138	break;
966	}	1139	}
967	else
968	slog (L_WARN, _("%s(%s): protocol mismatch"),
969	conf->nodename, (const char *)rsi);
970		1140
971	send_reset (rsi);	1141	send_reset (rsi);
972	}	1142	}
973		1143
974	break;	1144	break;
975		1145
976	case vpn_packet::PT_AUTH_RES:	1146	case vpn_packet::PT_AUTH_RES:
977	{	1147	{
978	auth_res_packet p = (auth_res_packet ) pkt;	1148	auth_res_packet p = (auth_res_packet )pkt;
979		1149
980	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1150	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
981		1151
982	if (p->chk_config ())	1152	auth_mac local_mac;
		1153	auth_hash (snd_auth, p->response.ecdh, local_mac);
		1154
		1155	if (!slow_memeq (&p->response.mac, local_mac, sizeof local_mac))
983	{	1156	{
984	if (p->prot_minor != PROTOCOL_MINOR)
985	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
986	conf->nodename, (const char *)rsi,
987	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
988
989	rsachallenge chg;
990
991	if (!rsa_cache.find (p->id, chg))
992	{
993	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1157	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
994	conf->nodename, (const char *)rsi);	1158	conf->nodename, (const char *)rsi);
995	break;
996	}	1159	}
997	else	1160	else if (!have_snd_auth)
998	{	1161	{
999	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1162	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
1000		1163
1001	if (!p->hmac_chk (cctx))	1164	have_snd_auth = true;
1002	{
1003	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1004	"could be an attack, or just corruption or a synchronization error"),
1005	conf->nodename, (const char *)rsi);
1006	break;
1007	}
1008	else
1009	{
1010	rsaresponse h;
1011
1012	rsa_hash (p->id, chg, h);
1013
1014	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1015	{
1016	prot_minor = p->prot_minor;
1017
1018	delete ictx; ictx = cctx;
1019
1020	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1021
1022	si = rsi;
1023	protocol = rsi.prot;
1024
1025	connection_established ();	1165	connection_established (rsi);
1026
1027	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1028	conf->nodename, (const char *)rsi,
1029	p->prot_major, p->prot_minor);
1030
1031	if (::conf.script_node_up)
1032	if (!run_script (run_script_cb (this, &connection::script_node_up), false))
1033	slog (L_WARN, _("node-up command execution failed, continuing."));
1034
1035	break;
1036	}
1037	else
1038	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1039	conf->nodename, (const char *)rsi);
1040	}
1041
1042	delete cctx;
1043	}
1044	}	1166	}
1045	}	1167	}
1046
1047	send_reset (rsi);
1048	break;	1168	break;
1049		1169
1050	case vpn_packet::PT_DATA_COMPRESSED:	1170	case vpn_packet::PT_DATA_COMPRESSED:
1051	#if !ENABLE_COMPRESSION	1171	#if !ENABLE_COMPRESSION
1052	send_reset (rsi);	1172	send_reset (rsi);
…		…
1058	if (ictx && octx)	1178	if (ictx && octx)
1059	{	1179	{
1060	vpndata_packet p = (vpndata_packet )pkt;	1180	vpndata_packet p = (vpndata_packet )pkt;
1061		1181
1062	if (!p->hmac_chk (ictx))	1182	if (!p->hmac_chk (ictx))
		1183	{
		1184	// rekeying often creates temporary hmac auth floods
		1185	// we assume they don't take longer than a few seconds normally,
		1186	// and suppress messages and resets during that time.
		1187	//TODO: should be done per source address
		1188	if (!hmac_error)
		1189	{
		1190	hmac_error = ev_now () + 3;
		1191	break;
		1192	}
		1193	else if (hmac_error >= ev_now ())
		1194	break; // silently suppress
		1195	else
		1196	{
1063	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1197	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1064	"could be an attack, or just corruption or a synchronization error"),	1198	"could be an attack, or just corruption or a synchronization error."),
1065	conf->nodename, (const char *)rsi);	1199	conf->nodename, (const char *)rsi);
		1200	// reset
		1201	}
		1202	}
1066	else	1203	else
1067	{	1204	{
1068	u32 seqno;	1205	u32 seqno;
1069	tap_packet *d = p->unpack (this, seqno);	1206	tap_packet *d = p->unpack (this, seqno);
		1207	int seqclass = iseqno.seqno_classify (seqno);
1070		1208
1071	if (iseqno.recv_ok (seqno))	1209	hmac_error = 0;
		1210
		1211	if (seqclass == 0) // ok
1072	{	1212	{
1073	vpn->tap->send (d);	1213	vpn->tap->send (d);
1074		1214
1075	if (si != rsi)	1215	if (si != rsi)
1076	{	1216	{
1077	// fast re-sync on source address changes, useful especially for tcp/ip	1217	// fast re-sync on source address changes, useful especially for tcp/ip
		1218	//if (last_si_change < ev_now () + 5.)
1078	si = rsi;	1219	// {
1079
1080	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1220	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1081	conf->nodename, (const char )si, (const char )rsi);	1221	conf->nodename, (const char )si, (const char )rsi);
		1222
		1223	si = rsi;
		1224
		1225	if (::conf.script_node_change)
		1226	{
		1227	run_script_cb *cb = new run_script_cb;
		1228	cb->set<connection, &connection::script_node_change> (this);
		1229	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1230	}
		1231
		1232	// }
		1233	//else
		1234	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1235	// conf->nodename, (const char )si, (const char )rsi);
1082	}	1236	}
		1237	}
		1238	else if (seqclass == 1) // far history
		1239	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1240	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1241	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1242	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1243	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1244	else if (seqclass == 3) // reset
		1245	{
		1246	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1247	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1248	send_reset (rsi);
1083	}	1249	}
1084		1250
1085	delete d;	1251	delete d;
1086	break;	1252	break;
1087	}	1253	}
…		…
1091	break;	1257	break;
1092		1258
1093	case vpn_packet::PT_CONNECT_REQ:	1259	case vpn_packet::PT_CONNECT_REQ:
1094	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1260	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1095	{	1261	{
1096	connect_req_packet p = (connect_req_packet ) pkt;	1262	connect_req_packet p = (connect_req_packet )pkt;
1097		1263
1098	if (p->id > 0 && p->id <= vpn->conns.size ())	1264	if (p->id > 0 && p->id <= vpn->conns.size ())
1099	{	1265	{
1100	connection *c = vpn->conns[p->id - 1];	1266	connection *c = vpn->conns[p->id - 1];
1101	conf->protocols = p->protocols;	1267	conf->protocols = p->protocols;
1102		1268
1103	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]",	1269	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1270	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1271	p->protocols,
1104	conf->id, p->id, c->ictx && c->octx);	1272	c->ictx && c->octx);
1105		1273
1106	if (c->ictx && c->octx)	1274	if (c->ictx && c->octx)
1107	{	1275	{
1108	// send connect_info packets to both sides, in case one is	1276	// send connect_info packets to both sides, in case one is
1109	// behind a nat firewall (or both ;)	1277	// behind a nat firewall (or both ;)
…		…
1132		1300
1133	c->conf->protocols = p->protocols;	1301	c->conf->protocols = p->protocols;
1134	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1302	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1135	p->si.upgrade_protocol (protocol, c->conf);	1303	p->si.upgrade_protocol (protocol, c->conf);
1136		1304
1137	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1305	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1138	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1306	conf->nodename,
		1307	vpn->conns[p->id - 1]->conf->nodename,
		1308	(const char *)p->si,
		1309	p->protocols,
		1310	protocol,
		1311	p->si.supported_protocols (c->conf),
		1312	!c->ictx && !c->octx);
1139		1313
1140	const sockinfo &dsi = forward_si (p->si);	1314	const sockinfo &dsi = forward_si (p->si);
1141		1315
1142	if (dsi.valid ())	1316	if (dsi.valid ())
1143	c->send_auth_request (dsi, true);	1317	c->send_auth_request (dsi, true);
		1318	else
		1319	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1320	vpn->conns[p->id - 1]->conf->nodename,
		1321	(const char *)p->si);
1144	}	1322	}
1145	else	1323	else
1146	slog (L_WARN,	1324	slog (L_WARN,
1147	_("received authenticated connection request from unknown node #%d, config file mismatch?"),	1325	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
1148	p->id);	1326	p->id);
…		…
1154	send_reset (rsi);	1332	send_reset (rsi);
1155	break;	1333	break;
1156	}	1334	}
1157	}	1335	}
1158		1336
1159	void connection::keepalive_cb (time_watcher &w)	1337	inline void
		1338	connection::keepalive_cb (ev::timer &w, int revents)
1160	{	1339	{
1161	if (NOW >= last_activity + ::conf.keepalive + 30)	1340	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1341
		1342	if (when >= 0)
		1343	w.start (when);
		1344	else if (when < -15)
1162	{	1345	{
1163	reset_connection ();	1346	reset_connection ("keepalive overdue");
1164	establish_connection ();	1347	establish_connection ();
1165	}	1348	}
1166	else if (NOW < last_activity + ::conf.keepalive)
1167	w.start (last_activity + ::conf.keepalive);
1168	else if (conf->connectmode != conf_node::C_ONDEMAND	1349	else if (conf->connectmode != conf_node::C_ONDEMAND
1169	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1350	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1170	{	1351	{
		1352	w.start (3);
1171	send_ping (si);	1353	send_ping (si);
1172	w.start (NOW + 5);
1173	}	1354	}
1174	else if (NOW < last_activity + ::conf.keepalive + 10)	1355	else if (when >= -10)
1175	// hold ondemand connections implicitly a few seconds longer	1356	// hold ondemand connections implicitly a few seconds longer
1176	// should delete octx, though, or something like that ;)	1357	// should delete octx, though, or something like that ;)
1177	w.start (last_activity + ::conf.keepalive + 10);	1358	w.start (when + 10);
1178	else	1359	else
1179	reset_connection ();	1360	reset_connection ("keepalive timeout");
1180	}	1361	}
1181		1362
		1363	void
1182	void connection::send_connect_request (int id)	1364	connection::send_connect_request (int id)
1183	{	1365	{
1184	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1366	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1185		1367
1186	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1368	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1369	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1370	THISNODE->protocols);
1187	p->hmac_set (octx);	1371	p->hmac_set (octx);
1188	send_vpn_packet (p, si);	1372	send_vpn_packet (p, si);
1189		1373
1190	delete p;	1374	delete p;
1191	}	1375	}
1192		1376
		1377	void
1193	void connection::script_init_env (const char *ext)	1378	connection::script_init_env (const char *ext)
1194	{	1379	{
1195	char *env;	1380	char *env;
1196	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);	1381	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1197	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);	1382	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1198	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,	1383	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1199	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,	1384	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1200	conf->id & 0xff); putenv (env);	1385	conf->id & 0xff); putenv (env);
1201	}	1386	}
1202		1387
		1388	void
1203	void connection::script_init_connect_env ()	1389	connection::script_init_connect_env ()
1204	{	1390	{
1205	vpn->script_init_env ();	1391	vpn->script_init_env ();
1206		1392
1207	char *env;	1393	char *env;
1208	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1394	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1395	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1209	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1396	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1210	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1397	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1211	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1398	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1212	}	1399	}
1213		1400
		1401	inline const char *
1214	const char *connection::script_node_up ()	1402	connection::script_node_up ()
1215	{	1403	{
1216	script_init_connect_env ();	1404	script_init_connect_env ();
1217		1405
1218	putenv ("STATE=up");	1406	putenv ((char *)"STATE=up");
1219		1407
1220	char *filename;	1408	char *filename;
1221	asprintf (&filename,	1409	asprintf (&filename,
1222	"%s/%s",	1410	"%s/%s",
1223	confbase,	1411	confbase,
1224	::conf.script_node_up ? ::conf.script_node_up : "node-up");	1412	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1225		1413
1226	return filename;	1414	return filename;
1227	}	1415	}
1228		1416
1229	const char *connection::script_node_down ()	1417	inline const char *
		1418	connection::script_node_change ()
1230	{	1419	{
1231	script_init_connect_env ();	1420	script_init_connect_env ();
1232		1421
		1422	putenv ((char *)"STATE=change");
		1423
		1424	char *filename;
		1425	asprintf (&filename,
		1426	"%s/%s",
		1427	confbase,
		1428	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1429
		1430	return filename;
		1431	}
		1432
		1433	inline const char *
		1434	connection::script_node_down ()
		1435	{
		1436	script_init_connect_env ();
		1437
1233	putenv ("STATE=down");	1438	putenv ((char *)"STATE=down");
1234		1439
1235	char *filename;	1440	char *filename;
1236	asprintf (&filename,	1441	asprintf (&filename,
1237	"%s/%s",	1442	"%s/%s",
1238	confbase,	1443	confbase,
…		…
1240		1445
1241	return filename;	1446	return filename;
1242	}	1447	}
1243		1448
1244	connection::connection (struct vpn vpn, conf_node conf)	1449	connection::connection (struct vpn vpn, conf_node conf)
1245	: vpn(vpn), conf(conf)	1450	: vpn(vpn), conf(conf),
1246	, rekey (this, &connection::rekey_cb)
1247	, keepalive (this, &connection::keepalive_cb)
1248	, establish_connection (this, &connection::establish_connection_cb)
1249	#if ENABLE_DNS	1451	#if ENABLE_DNS
1250	, dns (0)	1452	dns (0),
1251	#endif	1453	#endif
		1454	data_queue(conf->max_ttl, conf->max_queue + 1),
		1455	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1252	{	1456	{
		1457	rekey .set<connection, &connection::rekey_cb > (this);
		1458	keepalive .set<connection, &connection::keepalive_cb > (this);
		1459	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1460
		1461	last_establish_attempt = 0.;
1253	octx = ictx = 0;	1462	octx = ictx = 0;
1254	retry_cnt = 0;
1255		1463
1256	if (!conf->protocols) // make sure some protocol is enabled	1464	connectmode = conf->connectmode;
1257	conf->protocols = PROT_UDPv4;
1258		1465
1259	connectmode = conf_node::C_ALWAYS; // initial setting	1466	// queue a dummy packet to force an initial connection attempt
		1467	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1468	vpn_queue.put (new net_packet);
		1469
1260	reset_connection ();	1470	reset_connection ("startup");
1261	}	1471	}
1262		1472
1263	connection::~connection ()	1473	connection::~connection ()
1264	{	1474	{
1265	shutdown ();	1475	shutdown ();
1266	}	1476	}
1267		1477
		1478	void
1268	void connection_init ()	1479	connection_init ()
1269	{	1480	{
1270	auth_rate_limiter.clear ();	1481	auth_rate_limiter.clear ();
1271	reset_rate_limiter.clear ();	1482	reset_rate_limiter.clear ();
1272	}	1483	}
1273		1484

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Comparing gvpe/src/connection.C (file contents): Revision 1.59 by pcg, Mon Dec 5 12:58:09 2005 UTC vs. Revision 1.112 by root, Fri Sep 12 10:40:43 2014 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.59 by pcg, Mon Dec 5 12:58:09 2005 UTC vs.
Revision 1.112 by root, Fri Sep 12 10:40:43 2014 UTC