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

Comparing gvpe/src/connection.C (file contents):
Revision 1.38 by pcg, Sun Jul 25 18:11:40 2004 UTC vs.
Revision 1.101 by root, Wed Jul 17 16:40:57 2013 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
		5	This file is part of GVPE.
		6
5	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
6	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
7	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
8	(at your option) any later version.	10	option) any later version.
9		11
10	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
11	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13	GNU General Public License for more details.	15	Public License for more details.
14		16
15	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
16	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
17	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
18	*/	30	*/
19		31
20	#include "config.h"	32	#include "config.h"
21		33
22	#include <cassert>
23
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>
30
31	#include "gettext.h"
32		42
33	#include "conf.h"	43	#include "conf.h"
34	#include "slog.h"	44	#include "slog.h"
35	#include "device.h"	45	#include "device.h"
36	#include "vpn.h"	46	#include "vpn.h"
37	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
38		49
39	#include "netcompat.h"	50	#include "netcompat.h"
40		51
41	#if !HAVE_RAND_PSEUDO_BYTES
42	# define RAND_pseudo_bytes RAND_bytes
43	#endif
44
45	#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 "PORN\xbd\xc6\xdb\x82" // 8 bytes of magic//D
46		54
47	#define ULTRA_FAST 1	55	#define ULTRA_FAST 1
48	#define HLOG 15	56	#define HLOG 15
49	#include "lzf/lzf.h"	57	#include "lzf/lzf.h"
50	#include "lzf/lzf_c.c"	58	#include "lzf/lzf_c.c"
51	#include "lzf/lzf_d.c"	59	#include "lzf/lzf_d.c"
52		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
53	struct crypto_ctx	105	struct crypto_ctx
54	{	106	{
55	EVP_CIPHER_CTX cctx;	107	EVP_CIPHER_CTX cctx;
56	HMAC_CTX hctx;	108	HMAC_CTX hctx;
57		109
58	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);
59	~crypto_ctx ();	111	~crypto_ctx ();
60	};	112	};
61		113
62	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)
63	{	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 (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		126	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		127	kdf.extract (s, sizeof (s));
		128	kdf.extract_done (HKDF_PRF_HASH ());
		129	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		130
		131	HMAC_CTX_init (&hctx);
		132	require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		133	}
		134
		135	{
		136	u8 cipher_key[CIPHER_KEYSIZE];
		137	static const unsigned char cipher_info[] = "gvpe cipher key";
		138
		139	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		140	kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		141	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		142	kdf.extract (s, sizeof (s));
		143	kdf.extract_done (HKDF_PRF_HASH ());
		144	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		145
64	EVP_CIPHER_CTX_init (&cctx);	146	EVP_CIPHER_CTX_init (&cctx);
65	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	147	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
66	HMAC_CTX_init (&hctx);	148	}
67	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
68	}	149	}
69		150
70	crypto_ctx::~crypto_ctx ()	151	crypto_ctx::~crypto_ctx ()
71	{	152	{
72	require (EVP_CIPHER_CTX_cleanup (&cctx));	153	require (EVP_CIPHER_CTX_cleanup (&cctx));
73	HMAC_CTX_cleanup (&hctx);	154	HMAC_CTX_cleanup (&hctx);
74	}	155	}
75		156
		157	static inline void
		158	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		159	{
		160	if (RSA_public_encrypt (sizeof (auth.rsa),
		161	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		162	key, RSA_PKCS1_OAEP_PADDING) < 0)
		163	fatal ("RSA_public_encrypt error");
		164
		165	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		166	}
		167
		168	static inline bool
		169	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		170	{
		171	u8 rsa_decrypt[RSA_KEYLEN];
		172
		173	if (RSA_private_decrypt (sizeof (encr.rsa),
		174	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		175	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		176	return 0;
		177
		178	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		179	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		180
		181	return 1;
		182	}
		183
76	static void	184	static void
77	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	185	auth_hash (const auth_data &auth, auth_mac &mac)
78	{	186	{
79	EVP_MD_CTX ctx;	187	HMAC_CTX ctx;
80		188
81	EVP_MD_CTX_init (&ctx);	189	HMAC_CTX_init (&ctx);
82	require (EVP_DigestInit (&ctx, RSA_HASH));	190	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
83	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));	191	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
84	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
85	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	192	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
86	EVP_MD_CTX_cleanup (&ctx);	193	HMAC_CTX_cleanup (&ctx);
87	}	194	}
88		195
89	struct rsa_entry {	196	void
90	tstamp expire;	197	connection::generate_auth_data ()
91	rsaid id;
92	rsachallenge chg;
93	};
94
95	struct rsa_cache : list<rsa_entry>
96	{	198	{
97	void cleaner_cb (time_watcher &w); time_watcher cleaner;	199	if (auth_expire < ev_now ())
98
99	bool find (const rsaid &id, rsachallenge &chg)
100	{
101	for (iterator i = begin (); i != end (); ++i)
102	{
103	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)
104	{
105	memcpy (&chg, &i->chg, sizeof chg);
106
107	erase (i);
108	return true;
109	}
110	}
111
112	if (cleaner.at < NOW)
113	cleaner.start (NOW + RSA_TTL);
114
115	return false;
116	}
117
118	void gen (rsaid &id, rsachallenge &chg)
119	{
120	rsa_entry e;
121
122	RAND_bytes ((unsigned char *)&id, sizeof id);
123	RAND_bytes ((unsigned char *)&chg, sizeof chg);
124
125	e.expire = NOW + RSA_TTL;
126	e.id = id;
127	memcpy (&e.chg, &chg, sizeof chg);
128
129	push_back (e);
130
131	if (cleaner.at < NOW)
132	cleaner.start (NOW + RSA_TTL);
133	}
134
135	rsa_cache ()
136	: cleaner (this, &rsa_cache::cleaner_cb)
137	{ }	200	{
		201	// request data
		202	rand_fill (snd_auth.rsa);
		203	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
		204	auth_hash (snd_auth, snd_auth_mac);
138		205
139	} rsa_cache;	206	// eventual response data
140		207	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
141	void rsa_cache::cleaner_cb (time_watcher &w)
142	{
143	if (!empty ())
144	{	208	}
145	w.start (NOW + RSA_TTL);
146		209
147	for (iterator i = begin (); i != end (); )	210	// every use prolongs the expiry
148	if (i->expire <= NOW)	211	auth_expire = ev_now () + AUTH_TTL;
149	i = erase (i);
150	else
151	++i;
152	}
153	}	212	}
154		213
155	//////////////////////////////////////////////////////////////////////////////	214	//////////////////////////////////////////////////////////////////////////////
156		215
157	void pkt_queue::put (net_packet *p)	216	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		217	: max_ttl (max_ttl), max_queue (max_queue)
158	{	218	{
159	if (queue[i])	219	queue = new pkt [max_queue];
160	{
161	delete queue[i];
162	j = (j + 1) % QUEUEDEPTH;
163	}
164		220
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;	221	i = 0;
187	j = 0;	222	j = 0;
		223
		224	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
188	}	225	}
189		226
190	pkt_queue::~pkt_queue ()	227	pkt_queue::~pkt_queue ()
191	{	228	{
192	for (i = QUEUEDEPTH; --i > 0; )	229	while (net_packet *p = get ())
		230	delete p;
		231
193	delete queue[i];	232	delete [] queue;
194	}	233	}
195		234
		235	void
		236	pkt_queue::expire_cb (ev::timer &w, int revents)
		237	{
		238	ev_tstamp expire = ev_now () - max_ttl;
		239
		240	for (;;)
		241	{
		242	if (empty ())
		243	break;
		244
		245	double diff = queue[j].tstamp - expire;
		246
		247	if (diff >= 0.)
		248	{
		249	w.start (diff > 0.5 ? diff : 0.5);
		250	break;
		251	}
		252
		253	delete get ();
		254	}
		255	}
		256
		257	void
		258	pkt_queue::put (net_packet *p)
		259	{
		260	ev_tstamp now = ev_now ();
		261
		262	// start expiry timer
		263	if (empty ())
		264	expire.start (max_ttl);
		265
		266	int ni = i + 1 == max_queue ? 0 : i + 1;
		267
		268	if (ni == j)
		269	delete get ();
		270
		271	queue[i].pkt = p;
		272	queue[i].tstamp = now;
		273
		274	i = ni;
		275	}
		276
		277	net_packet *
		278	pkt_queue::get ()
		279	{
		280	if (empty ())
		281	return 0;
		282
		283	net_packet *p = queue[j].pkt;
		284	queue[j].pkt = 0;
		285
		286	j = j + 1 == max_queue ? 0 : j + 1;
		287
		288	return p;
		289	}
		290
196	struct net_rateinfo {	291	struct net_rateinfo
		292	{
197	u32 host;	293	u32 host;
198	double pcnt, diff;	294	double pcnt, diff;
199	tstamp last;	295	tstamp last;
200	};	296	};
201		297
211		307
212	bool can (const sockinfo &si) { return can((u32)si.host); }	308	bool can (const sockinfo &si) { return can((u32)si.host); }
213	bool can (u32 host);	309	bool can (u32 host);
214	};	310	};
215		311
216	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	312	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
217		313
		314	bool
218	bool net_rate_limiter::can (u32 host)	315	net_rate_limiter::can (u32 host)
219	{	316	{
220	iterator i;	317	iterator i;
221		318
222	for (i = begin (); i != end (); )	319	for (i = begin (); i != end (); )
223	if (i->host == host)	320	if (i->host == host)
224	break;	321	break;
225	else if (i->last < NOW - NRL_EXPIRE)	322	else if (i->last < ev_now () - NRL_EXPIRE)
226	i = erase (i);	323	i = erase (i);
227	else	324	else
228	i++;	325	i++;
229		326
230	if (i == end ())	327	if (i == end ())
…		…
232	net_rateinfo ri;	329	net_rateinfo ri;
233		330
234	ri.host = host;	331	ri.host = host;
235	ri.pcnt = 1.;	332	ri.pcnt = 1.;
236	ri.diff = NRL_MAXDIF;	333	ri.diff = NRL_MAXDIF;
237	ri.last = NOW;	334	ri.last = ev_now ();
238		335
239	push_front (ri);	336	push_front (ri);
240		337
241	return true;	338	return true;
242	}	339	}
…		…
244	{	341	{
245	net_rateinfo ri (*i);	342	net_rateinfo ri (*i);
246	erase (i);	343	erase (i);
247		344
248	ri.pcnt = ri.pcnt * NRL_ALPHA;	345	ri.pcnt = ri.pcnt * NRL_ALPHA;
249	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	346	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
250		347
251	ri.last = NOW;	348	ri.last = ev_now ();
252		349
253	double dif = ri.diff / ri.pcnt;	350	double dif = ri.diff / ri.pcnt;
254		351
255	bool send = dif > NRL_CUTOFF;	352	bool send = dif > NRL_CUTOFF;
256		353
…		…
270		367
271	/////////////////////////////////////////////////////////////////////////////	368	/////////////////////////////////////////////////////////////////////////////
272		369
273	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	370	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
274		371
		372	void
275	void hmac_packet::hmac_gen (crypto_ctx *ctx)	373	hmac_packet::hmac_gen (crypto_ctx *ctx)
276	{	374	{
277	unsigned int xlen;	375	unsigned int xlen;
278		376
279	HMAC_CTX *hctx = &ctx->hctx;	377	HMAC_CTX *hctx = &ctx->hctx;
280		378
281	HMAC_Init_ex (hctx, 0, 0, 0, 0);	379	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
282	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	380	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
283	len - sizeof (hmac_packet));	381	len - sizeof (hmac_packet)));
284	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	382	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
285	}	383	}
286		384
287	void	385	void
288	hmac_packet::hmac_set (crypto_ctx *ctx)	386	hmac_packet::hmac_set (crypto_ctx *ctx)
289	{	387	{
…		…
298	hmac_gen (ctx);	396	hmac_gen (ctx);
299		397
300	return !memcmp (hmac, hmac_digest, HMACLENGTH);	398	return !memcmp (hmac, hmac_digest, HMACLENGTH);
301	}	399	}
302		400
		401	void
303	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	402	vpn_packet::set_hdr (ptype type_, unsigned int dst)
304	{	403	{
305	type = type_;	404	type = type_;
306		405
307	int src = THISNODE->id;	406	int src = THISNODE->id;
308		407
…		…
313		412
314	#define MAXVPNDATA (MAX_MTU - 6 - 6)	413	#define MAXVPNDATA (MAX_MTU - 6 - 6)
315	#define DATAHDR (sizeof (u32) + RAND_SIZE)	414	#define DATAHDR (sizeof (u32) + RAND_SIZE)
316		415
317	struct vpndata_packet : vpn_packet	416	struct vpndata_packet : vpn_packet
		417	{
		418	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		419
		420	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		421	tap_packet unpack (connection conn, u32 &seqno);
		422
		423	private:
		424	const u32 data_hdr_size () const
318	{	425	{
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;	426	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
328	}
329	};	427	}
		428	};
330		429
331	void	430	void
332	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	431	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
333	{	432	{
334	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	433	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
336	ptype type = PT_DATA_UNCOMPRESSED;	435	ptype type = PT_DATA_UNCOMPRESSED;
337		436
338	#if ENABLE_COMPRESSION	437	#if ENABLE_COMPRESSION
339	u8 cdata[MAX_MTU];	438	u8 cdata[MAX_MTU];
340		439
341	if (conn->features & ENABLE_COMPRESSION)	440	if (conn->features & FEATURE_COMPRESSION)
342	{	441	{
343	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	442	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
344		443
345	if (cl)	444	if (cl)
346	{	445	{
…		…
352	d[1] = cl;	451	d[1] = cl;
353	}	452	}
354	}	453	}
355	#endif	454	#endif
356		455
357	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	456	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
358		457
359	struct {	458	struct {
360	#if RAND_SIZE	459	#if RAND_SIZE
361	u8 rnd[RAND_SIZE];	460	u8 rnd[RAND_SIZE];
362	#endif	461	#endif
363	u32 seqno;	462	u32 seqno;
364	} datahdr;	463	} datahdr;
365		464
366	datahdr.seqno = ntohl (seqno);	465	datahdr.seqno = ntohl (seqno);
367	#if RAND_SIZE	466	#if RAND_SIZE
368	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	467	require (RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE) >= 0);
369	#endif	468	#endif
370		469
371	require (EVP_EncryptUpdate (cctx,	470	require (EVP_EncryptUpdate (cctx,
372	(unsigned char *) data + outl, &outl2,	471	(unsigned char *) data + outl, &outl2,
373	(unsigned char *) &datahdr, DATAHDR));	472	(unsigned char *) &datahdr, DATAHDR));
…		…
395	int outl = 0, outl2;	494	int outl = 0, outl2;
396	tap_packet *p = new tap_packet;	495	tap_packet *p = new tap_packet;
397	u8 *d;	496	u8 *d;
398	u32 l = len - data_hdr_size ();	497	u32 l = len - data_hdr_size ();
399		498
400	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	499	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
401		500
402	#if ENABLE_COMPRESSION	501	#if ENABLE_COMPRESSION
403	u8 cdata[MAX_MTU];	502	u8 cdata[MAX_MTU];
404		503
405	if (type == PT_DATA_COMPRESSED)	504	if (type == PT_DATA_COMPRESSED)
406	d = cdata;	505	d = cdata;
407	else	506	else
408	#endif	507	#endif
409	d = &(*p)[6 + 6 - DATAHDR];	508	d = &(*p)[6 + 6] - DATAHDR;
410		509
411	/* this overwrites part of the src mac, but we fix that later */	510	// we play do evil games with the struct layout atm.
		511	// pending better solutions, we at least do some verification.
		512	// this is fine, as we left ISO territory long ago.
		513	require (DATAHDR <= 16);
		514	require ((u8 )(&p->len + 1) == &(p)[0]);
		515
		516	// this can overwrite the len/dst/src fields
412	require (EVP_DecryptUpdate (cctx,	517	require (EVP_DecryptUpdate (cctx,
413	d, &outl2,	518	d, &outl2,
414	(unsigned char *)&data, len - data_hdr_size ()));	519	(unsigned char *)&data, len - data_hdr_size ()));
415	outl += outl2;	520	outl += outl2;
416		521
…		…
447	}	552	}
448	};	553	};
449		554
450	struct config_packet : vpn_packet	555	struct config_packet : vpn_packet
451	{	556	{
452	// actually, hmaclen cannot be checked because the hmac
453	// field comes before this data, so peers with other
454	// hmacs simply will not work.
455	u8 prot_major, prot_minor, randsize, hmaclen;	557	u8 prot_major, prot_minor, randsize;
456	u8 flags, challengelen, features, pad3;	558	u8 flags, features, pad6, pad7, pad8;
457	u32 cipher_nid, digest_nid, hmac_nid;	559	u32 cipher_nid, mac_nid, auth_nid;
458		560
459	void setup (ptype type, int dst);	561	void setup (ptype type, int dst);
460	bool chk_config () const;	562	bool chk_config () const;
461		563
462	static u8 get_features ()	564	static u8 get_features ()
…		…
466	f \|= FEATURE_COMPRESSION;	568	f \|= FEATURE_COMPRESSION;
467	#endif	569	#endif
468	#if ENABLE_ROHC	570	#if ENABLE_ROHC
469	f \|= FEATURE_ROHC;	571	f \|= FEATURE_ROHC;
470	#endif	572	#endif
		573	#if ENABLE_BRIDGING
		574	f \|= FEATURE_BRIDGING;
		575	#endif
471	return f;	576	return f;
472	}	577	}
473	};	578	};
474		579
		580	void
475	void config_packet::setup (ptype type, int dst)	581	config_packet::setup (ptype type, int dst)
476	{	582	{
477	prot_major = PROTOCOL_MAJOR;	583	prot_major = PROTOCOL_MAJOR;
478	prot_minor = PROTOCOL_MINOR;	584	prot_minor = PROTOCOL_MINOR;
479	randsize = RAND_SIZE;	585	randsize = RAND_SIZE;
480	hmaclen = HMACLENGTH;	586	flags = 0;
481	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
482	challengelen = sizeof (rsachallenge);
483	features = get_features ();	587	features = get_features ();
484		588
485	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	589	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
486	digest_nid = htonl (EVP_MD_type (RSA_HASH));
487	hmac_nid = htonl (EVP_MD_type (DIGEST));	590	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		591	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
488		592
489	len = sizeof (*this) - sizeof (net_packet);	593	len = sizeof (*this) - sizeof (net_packet);
490	set_hdr (type, dst);	594	set_hdr (type, dst);
491	}	595	}
492		596
		597	bool
493	bool config_packet::chk_config () const	598	config_packet::chk_config () const
494	{	599	{
495	if (prot_major != PROTOCOL_MAJOR)	600	if (prot_major != PROTOCOL_MAJOR)
496	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	601	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
497	else if (randsize != RAND_SIZE)	602	else if (randsize != RAND_SIZE)
498	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	603	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
499	else if (hmaclen != HMACLENGTH)
500	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
501	#if 0 // this implementation should handle all flag settings
502	else if (flags != curflags ())
503	slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ());
504	#endif
505	else if (challengelen != sizeof (rsachallenge))
506	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
507	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	604	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
508	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	605	slog (L_WARN, _("cipher algo mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
509	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
510	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
511	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	606	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
512	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	607	slog (L_WARN, _("mac algo mismatch (remote %x <=> local %x)"), ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		608	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		609	slog (L_WARN, _("auth algo mismatch (remote %x <=> local %x)"), ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
513	else	610	else
514	return true;	611	return true;
515		612
516	return false;	613	return false;
517	}	614	}
518		615
519	struct auth_req_packet : config_packet	616	struct auth_req_packet : config_packet // UNPROTECTED
520	{	617	{
521	char magic[8];	618	char magic[8];
522	u8 initiate; // false if this is just an automatic reply	619	u8 initiate; // false if this is just an automatic reply
523	u8 protocols; // supported protocols (will be patched on forward)	620	u8 protocols; // supported protocols (will be patched on forward)
524	u8 pad2, pad3;	621	u8 pad2, pad3;
525	rsaid id;	622	auth_encr encr;
526	rsaencrdata encr;
527		623
528	auth_req_packet (int dst, bool initiate_, u8 protocols_)	624	auth_req_packet (int dst, bool initiate_, u8 protocols_)
529	{	625	{
530	config_packet::setup (PT_AUTH_REQ, dst);	626	config_packet::setup (PT_AUTH_REQ, dst);
531	strncpy (magic, MAGIC, 8);	627	memcpy (magic, MAGIC, 8);
532	initiate = !!initiate_;	628	initiate = !!initiate_;
533	protocols = protocols_;	629	protocols = protocols_;
534		630
535	len = sizeof (*this) - sizeof (net_packet);	631	len = sizeof (*this) - sizeof (net_packet);
536	}	632	}
537	};	633	};
538		634
539	struct auth_res_packet : config_packet	635	struct auth_res_packet : config_packet // UNPROTECTED
540	{	636	{
541	rsaid id;
542	u8 pad1, pad2, pad3;
543	u8 response_len; // encrypted length
544	rsaresponse response;	637	auth_response response;
545		638
546	auth_res_packet (int dst)	639	auth_res_packet (int dst)
547	{	640	{
548	config_packet::setup (PT_AUTH_RES, dst);	641	config_packet::setup (PT_AUTH_RES, dst);
549		642
…		…
583	};	676	};
584		677
585	/////////////////////////////////////////////////////////////////////////////	678	/////////////////////////////////////////////////////////////////////////////
586		679
587	void	680	void
588	connection::connection_established ()	681	connection::connection_established (const sockinfo &rsi)
589	{	682	{
		683	if (!have_snd_auth \|\| !have_rcv_auth)
		684	return;
		685
		686	si = rsi;
		687	protocol = rsi.prot;
		688
		689	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		690	conf->nodename, (const char *)rsi,
		691	is_direct ? "direct" : "forwarded",
		692	PROTOCOL_MAJOR, prot_minor);
		693
		694	if (::conf.script_node_up)
		695	{
		696	run_script_cb *cb = new run_script_cb;
		697	cb->set<connection, &connection::script_node_up> (this);
		698	run_script_queued (cb, _("node-up command execution failed, continuing."));
		699	}
		700
		701	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		702	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		703
		704	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		705	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		706
590	if (ictx && octx)	707	if (ictx && octx)
591	{	708	{
592	connectmode = conf->connectmode;
593
594	// make sure rekeying timeouts are slightly asymmetric	709	// make sure rekeying timeouts are slightly asymmetric
595	rekey.start (NOW + ::conf.rekey	710	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
596	+ (conf->id > THISNODE->id ? 10 : 0));	711	rekey.start (rekey_interval, rekey_interval);
		712
597	keepalive.start (NOW + ::conf.keepalive);	713	keepalive.start (::conf.keepalive);
598		714
599	// send queued packets	715	// send queued packets
600	if (ictx && octx)	716	if (ictx && octx)
601	{	717	{
602	while (tap_packet p = (tap_packet )data_queue.get ())	718	while (tap_packet p = (tap_packet )data_queue.get ())
603	{	719	{
604	send_data_packet (p);	720	if (p->len) send_data_packet (p);
605	delete p;	721	delete p;
606	}	722	}
607		723
608	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	724	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
609	{	725	{
610	send_vpn_packet (p, si, IPTOS_RELIABILITY);	726	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
611	delete p;	727	delete p;
612	}	728	}
613	}	729	}
		730
		731	vpn->connection_established (this);
614	}	732	}
		733	#if 0
615	else	734	else
616	{	735	{
617	retry_cnt = 0;	736	retry_cnt = 0;
618	establish_connection.start (NOW + 5);	737	establish_connection.start (5);
619	keepalive.stop ();	738	keepalive.stop ();
620	rekey.stop ();	739	rekey.stop ();
621	}	740	}
		741	#endif
622	}	742	}
623		743
624	void	744	void
625	connection::reset_si ()	745	connection::reset_si ()
626	{	746	{
		747	if (vpn->can_direct (THISNODE, conf))
627	protocol = best_protocol (THISNODE->protocols & conf->protocols);	748	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
628		749	else
629	// mask out protocols we cannot establish	750	{
630	if (!conf->udp_port) protocol &= ~PROT_UDPv4;	751	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
631	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;	752	protocol = 0;
		753	}
632		754
633	si.set (conf, protocol);	755	si.set (conf, protocol);
		756
		757	is_direct = si.valid ();
634	}	758	}
635		759
636	// ensure sockinfo is valid, forward if necessary	760	// ensure sockinfo is valid, forward if necessary
637	const sockinfo &	761	const sockinfo &
638	connection::forward_si (const sockinfo &si) const	762	connection::forward_si (const sockinfo &si) const
639	{	763	{
640	if (!si.valid ())	764	if (!si.valid ())
641	{	765	{
642	connection *r = vpn->find_router ();	766	connection *r = vpn->find_router_for (this);
643		767
644	if (r)	768	if (r)
645	{	769	{
646	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	770	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
647	conf->nodename, r->conf->nodename);	771	conf->nodename, r->conf->nodename);
648	return r->si;	772	return r->si;
649	}	773	}
650	else	774	else
651	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	775	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
652	conf->nodename);	776	conf->nodename);
653	}	777	}
654		778
655	return si;	779	return si;
656	}	780	}
…		…
666	connection::send_ping (const sockinfo &si, u8 pong)	790	connection::send_ping (const sockinfo &si, u8 pong)
667	{	791	{
668	ping_packet *pkt = new ping_packet;	792	ping_packet *pkt = new ping_packet;
669		793
670	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	794	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		795
		796	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
671	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	797	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
672		798
673	delete pkt;	799	delete pkt;
674	}	800	}
675		801
…		…
690	void	816	void
691	connection::send_auth_request (const sockinfo &si, bool initiate)	817	connection::send_auth_request (const sockinfo &si, bool initiate)
692	{	818	{
693	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	819	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
694		820
695	rsachallenge chg;	821	generate_auth_data ();
696	rsa_cache.gen (pkt->id, chg);
697	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	822	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
698		823
699	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	824	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
700
701	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	825	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
702		826
703	delete pkt;	827	delete pkt;
704	}	828	}
705		829
706	void	830	void
707	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	831	connection::send_auth_response (const sockinfo &si)
708	{	832	{
709	auth_res_packet *pkt = new auth_res_packet (conf->id);	833	auth_res_packet *pkt = new auth_res_packet (conf->id);
710		834
711	pkt->id = id;	835	auth_hash (rcv_auth, pkt->response.mac);
		836	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
712		837
713	rsa_hash (id, chg, pkt->response);
714
715	pkt->hmac_set (octx);
716
717	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	838	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
718
719	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	839	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
720		840
721	delete pkt;	841	delete pkt;
722	}	842	}
723		843
724	void	844	void
725	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	845	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
726	{	846	{
727	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	847	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
728	conf->id, rid, (const char *)rsi);	848	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		849	conf->protocols);
729		850
730	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	851	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
731		852
732	r->hmac_set (octx);	853	r->hmac_set (octx);
733	send_vpn_packet (r, si);	854	send_vpn_packet (r, si);
734		855
735	delete r;	856	delete r;
736	}	857	}
737		858
738	void	859	inline void
739	connection::establish_connection_cb (time_watcher &w)	860	connection::establish_connection_cb (ev::timer &w, int revents)
740	{	861	{
741	if (!ictx	862	if (!(ictx && octx)
742	&& conf != THISNODE	863	&& conf != THISNODE
743	&& connectmode != conf_node::C_NEVER	864	&& connectmode != conf_node::C_NEVER
744	&& connectmode != conf_node::C_DISABLED	865	&& connectmode != conf_node::C_DISABLED
745	&& NOW > w.at)	866	&& !w.is_active ())
746	{	867	{
747	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	868	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
748		869	// and stop trying. should probably be handled by a per-connection expire handler.
749	if (retry_int < conf->max_retry)	870	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		871	{
		872	reset_connection ();
750	retry_cnt++;	873	return;
751	else	874	}
752	retry_int = conf->max_retry;
753		875
754	w.start (NOW + retry_int);	876	last_establish_attempt = ev_now ();
		877
		878	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		879	? (retry_cnt & 3) + 1
		880	: 1 << (retry_cnt >> 2));
755		881
756	reset_si ();	882	reset_si ();
757		883
758	if (si.prot && !si.host)	884	bool slow = si.prot & PROT_SLOW;
		885
		886	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		887	{
		888	/TODO/ /* start the timer so we don't recurse endlessly */
		889	w.start (1);
759	vpn->send_connect_request (conf->id);	890	vpn->send_connect_request (this);
		891	}
760	else	892	else
761	{	893	{
		894	if (si.valid ())
		895	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		896	conf->nodename, (const char *)si);
		897
762	const sockinfo &dsi = forward_si (si);	898	const sockinfo &dsi = forward_si (si);
		899
		900	slow = slow \|\| (dsi.prot & PROT_SLOW);
763		901
764	if (dsi.valid () && auth_rate_limiter.can (dsi))	902	if (dsi.valid () && auth_rate_limiter.can (dsi))
765	{	903	{
766	if (retry_cnt < 4)	904	if (retry_cnt < 4)
767	send_auth_request (dsi, true);	905	send_auth_request (dsi, true);
768	else	906	else
769	send_ping (dsi, 0);	907	send_ping (dsi, 0);
770	}	908	}
771	}	909	}
		910
		911	retry_int *= slow ? 8. : 0.9;
		912
		913	if (retry_int < conf->max_retry)
		914	retry_cnt++;
		915	else
		916	retry_int = conf->max_retry;
		917
		918	w.start (retry_int);
772	}	919	}
773	}	920	}
774		921
775	void	922	void
776	connection::reset_connection ()	923	connection::reset_connection ()
…		…
779	{	926	{
780	slog (L_INFO, _("%s(%s): connection lost"),	927	slog (L_INFO, _("%s(%s): connection lost"),
781	conf->nodename, (const char *)si);	928	conf->nodename, (const char *)si);
782		929
783	if (::conf.script_node_down)	930	if (::conf.script_node_down)
784	run_script (run_script_cb (this, &connection::script_node_down), false);	931	{
		932	run_script_cb *cb = new run_script_cb;
		933	cb->set<connection, &connection::script_node_down> (this);
		934	run_script_queued (cb, _("node-down command execution failed, continuing."));
		935	}
785	}	936	}
786		937
787	delete ictx; ictx = 0;	938	delete ictx; ictx = 0;
788	delete octx; octx = 0;	939	delete octx; octx = 0;
789		940
790	si.host = 0;	941	si.host = 0;
791		942
		943	have_snd_auth = false;
		944	have_rcv_auth = false;
		945	auth_expire = 0.;
		946
792	last_activity = 0;	947	last_activity = 0.;
		948	//last_si_change = 0.;
793	retry_cnt = 0;	949	retry_cnt = 0;
794		950
795	rekey.stop ();	951	rekey.stop ();
796	keepalive.stop ();	952	keepalive.stop ();
797	establish_connection.stop ();	953	establish_connection.stop ();
…		…
804	send_reset (si);	960	send_reset (si);
805		961
806	reset_connection ();	962	reset_connection ();
807	}	963	}
808		964
809	void	965	// poor-man's rekeying
810	connection::rekey_cb (time_watcher &w)	966	inline void
		967	connection::rekey_cb (ev::timer &w, int revents)
811	{	968	{
812	reset_connection ();	969	reset_connection ();
813	establish_connection ();	970	establish_connection ();
814	}	971	}
815		972
…		…
831	if (oseqno > MAX_SEQNO)	988	if (oseqno > MAX_SEQNO)
832	rekey ();	989	rekey ();
833	}	990	}
834		991
835	void	992	void
		993	connection::post_inject_queue ()
		994	{
		995	// force a connection every now and when when packets are sent (max 1/s)
		996	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		997	establish_connection.stop ();
		998
		999	establish_connection ();
		1000	}
		1001
		1002	void
836	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1003	connection::inject_data_packet (tap_packet *pkt)
837	{	1004	{
838	if (ictx && octx)	1005	if (ictx && octx)
839	send_data_packet (pkt);	1006	send_data_packet (pkt);
840	else	1007	else
841	{	1008	{
842	if (!broadcast)//DDDD
843	data_queue.put (new tap_packet (*pkt));	1009	data_queue.put (new tap_packet (*pkt));
844		1010	post_inject_queue ();
845	establish_connection ();
846	}	1011	}
847	}	1012	}
848		1013
		1014	void
849	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1015	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
850	{	1016	{
851	if (ictx && octx)	1017	if (ictx && octx)
852	send_vpn_packet (pkt, si, tos);	1018	send_vpn_packet (pkt, si, tos);
853	else	1019	else
854	{	1020	{
855	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1021	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
856		1022	post_inject_queue ();
857	establish_connection ();
858	}	1023	}
859	}	1024	}
860		1025
861	void	1026	void
862	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1027	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
863	{	1028	{
864	last_activity = NOW;	1029	last_activity = ev_now ();
865		1030
866	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1031	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
867	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1032	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1033
		1034	if (connectmode == conf_node::C_DISABLED)
		1035	return;
868		1036
869	switch (pkt->typ ())	1037	switch (pkt->typ ())
870	{	1038	{
871	case vpn_packet::PT_PING:	1039	case vpn_packet::PT_PING:
		1040	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1041
872	// we send pings instead of auth packets after some retries,	1042	// we send pings instead of auth packets after some retries,
873	// so reset the retry counter and establish a connection	1043	// so reset the retry counter and establish a connection
874	// when we receive a ping.	1044	// when we receive a ping.
875	if (!ictx)	1045	if (!ictx)
876	{	1046	{
877	if (auth_rate_limiter.can (rsi))	1047	if (auth_rate_limiter.can (rsi))
878	send_auth_request (rsi, true);	1048	send_auth_request (rsi, true);
879	}	1049	}
880	else	1050	else
		1051	// we would love to change the socket address here, but ping's aren't
		1052	// authenticated, so we best ignore it.
881	send_ping (rsi, 1); // pong	1053	send_ping (rsi, 1); // pong
882		1054
883	break;	1055	break;
884		1056
885	case vpn_packet::PT_PONG:	1057	case vpn_packet::PT_PONG:
		1058	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1059
		1060	// a PONG might mean that the other side doesn't really know
		1061	// about our desire for communication.
		1062	establish_connection ();
886	break;	1063	break;
887		1064
888	case vpn_packet::PT_RESET:	1065	case vpn_packet::PT_RESET:
889	{	1066	{
890	reset_connection ();	1067	reset_connection ();
891		1068
892	config_packet p = (config_packet ) pkt;	1069	config_packet p = (config_packet ) pkt;
893		1070
894	if (!p->chk_config ())	1071	if (!p->chk_config ())
895	{	1072	{
896	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1073	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
897	conf->nodename, (const char *)rsi);	1074	conf->nodename, (const char *)rsi);
898	connectmode = conf_node::C_DISABLED;	1075	connectmode = conf_node::C_DISABLED;
899	}	1076	}
900	else if (connectmode == conf_node::C_ALWAYS)	1077	else if (connectmode == conf_node::C_ALWAYS)
901	establish_connection ();	1078	establish_connection ();
…		…
903	break;	1080	break;
904		1081
905	case vpn_packet::PT_AUTH_REQ:	1082	case vpn_packet::PT_AUTH_REQ:
906	if (auth_rate_limiter.can (rsi))	1083	if (auth_rate_limiter.can (rsi))
907	{	1084	{
908	auth_req_packet p = (auth_req_packet ) pkt;	1085	auth_req_packet p = (auth_req_packet )pkt;
909		1086
910	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1087	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1088	conf->nodename, p->initiate ? "initiate" : "reply",
		1089	p->protocols, p->features);
911		1090
912	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1091	if (p->chk_config () && !memcmp (p->magic, MAGIC, 8))
913	{	1092	{
914	if (p->prot_minor != PROTOCOL_MINOR)	1093	if (p->prot_minor != PROTOCOL_MINOR)
915	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1094	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
916	conf->nodename, (const char *)rsi,	1095	conf->nodename, (const char *)rsi,
917	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1096	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
918		1097
919	if (p->initiate)	1098	if (p->initiate)
920	send_auth_request (rsi, false);	1099	send_auth_request (rsi, false);
921		1100
922	rsachallenge k;	1101	auth_data auth;
923		1102
924	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1103	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
925	{	1104	{
926	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1105	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
927	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1106	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
928	break;
929	}	1107	}
930	else	1108	else
931	{	1109	{
932	delete octx;	1110	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
933		1111
934	octx = new crypto_ctx (k, 1);	1112	rcv_auth = auth;
935	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1113	have_rcv_auth = true;
936		1114
937	// compatibility code, remove when no longer required	1115	send_auth_response (rsi);
938	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
939		1116
		1117	if (chg)
		1118	{
940	conf->protocols = p->protocols;	1119	conf->protocols = p->protocols;
941	features = p->features & config_packet::get_features ();	1120	features = p->features & config_packet::get_features ();
942		1121
943	send_auth_response (rsi, p->id, k);
944
945	connection_established ();	1122	connection_established (rsi);
946
947	break;	1123	}
948	}	1124	}
		1125
		1126	break;
949	}	1127	}
950	else	1128	else
951	slog (L_WARN, _("%s(%s): protocol mismatch"),	1129	slog (L_WARN, _("%s(%s): protocol mismatch."),
952	conf->nodename, (const char *)rsi);	1130	conf->nodename, (const char *)rsi);
953		1131
954	send_reset (rsi);	1132	send_reset (rsi);
955	}	1133	}
956		1134
957	break;	1135	break;
958		1136
959	case vpn_packet::PT_AUTH_RES:	1137	case vpn_packet::PT_AUTH_RES:
960	{	1138	{
961	auth_res_packet p = (auth_res_packet ) pkt;	1139	auth_res_packet p = (auth_res_packet )pkt;
962		1140
963	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1141	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
964		1142
965	if (p->chk_config ())	1143	if (p->chk_config ())
966	{	1144	{
967	if (p->prot_minor != PROTOCOL_MINOR)	1145	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
968	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
969	conf->nodename, (const char *)rsi,
970	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
971
972	rsachallenge chg;
973
974	if (!rsa_cache.find (p->id, chg))
975	{	1146	{
976	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1147	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
977	conf->nodename, (const char *)rsi);	1148	conf->nodename, (const char *)rsi);
978	break;
979	}	1149	}
980	else	1150	else if (!have_snd_auth)
981	{	1151	{
982	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1152	if (p->prot_minor != PROTOCOL_MINOR)
983		1153	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
984	if (!p->hmac_chk (cctx))
985	{
986	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
987	"could be an attack, or just corruption or a synchronization error"),
988	conf->nodename, (const char *)rsi);	1154	conf->nodename, (const char *)rsi,
989	break;	1155	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
990	}
991	else
992	{
993	rsaresponse h;
994		1156
995	rsa_hash (p->id, chg, h);
996
997	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
998	{
999	prot_minor = p->prot_minor;	1157	prot_minor = p->prot_minor;
		1158	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
1000		1159
1001	delete ictx; ictx = cctx;	1160	have_snd_auth = true;
1002
1003	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1004
1005	si = rsi;
1006	protocol = rsi.prot;
1007
1008	connection_established ();	1161	connection_established (rsi);
1009
1010	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1011	conf->nodename, (const char *)rsi,
1012	p->prot_major, p->prot_minor);
1013
1014	if (::conf.script_node_up)
1015	run_script (run_script_cb (this, &connection::script_node_up), false);
1016
1017	break;
1018	}
1019	else
1020	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1021	conf->nodename, (const char *)rsi);
1022	}
1023
1024	delete cctx;
1025	}	1162	}
		1163
		1164	break;
1026	}	1165	}
1027	}	1166	}
1028		1167
1029	send_reset (rsi);	1168	send_reset (rsi);
1030	break;	1169	break;
…		…
1041	{	1180	{
1042	vpndata_packet p = (vpndata_packet )pkt;	1181	vpndata_packet p = (vpndata_packet )pkt;
1043		1182
1044	if (!p->hmac_chk (ictx))	1183	if (!p->hmac_chk (ictx))
1045	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1184	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1046	"could be an attack, or just corruption or a synchronization error"),	1185	"could be an attack, or just corruption or a synchronization error."),
1047	conf->nodename, (const char *)rsi);	1186	conf->nodename, (const char *)rsi);
1048	else	1187	else
1049	{	1188	{
1050	u32 seqno;	1189	u32 seqno;
1051	tap_packet *d = p->unpack (this, seqno);	1190	tap_packet *d = p->unpack (this, seqno);
		1191	int seqclass = iseqno.seqno_classify (seqno);
1052		1192
1053	if (iseqno.recv_ok (seqno))	1193	if (seqclass == 0) // ok
1054	{	1194	{
1055	vpn->tap->send (d);	1195	vpn->tap->send (d);
1056		1196
1057	if (si != rsi)	1197	if (si != rsi)
1058	{	1198	{
1059	// fast re-sync on connection changes, useful especially for tcp/ip	1199	// fast re-sync on source address changes, useful especially for tcp/ip
		1200	//if (last_si_change < ev_now () + 5.)
1060	si = rsi;	1201	// {
1061
1062	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1202	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1063	conf->nodename, (const char )si, (const char )rsi);	1203	conf->nodename, (const char )si, (const char )rsi);
		1204
		1205	si = rsi;
		1206
		1207	if (::conf.script_node_change)
		1208	{
		1209	run_script_cb *cb = new run_script_cb;
		1210	cb->set<connection, &connection::script_node_change> (this);
		1211	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1212	}
		1213
		1214	// }
		1215	//else
		1216	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1217	// conf->nodename, (const char )si, (const char )rsi);
1064	}	1218	}
		1219	}
		1220	else if (seqclass == 1) // far history
		1221	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1222	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1223	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1224	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1225	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1226	else if (seqclass == 3) // reset
		1227	{
		1228	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1229	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1230	send_reset (rsi);
1065	}	1231	}
1066		1232
1067	delete d;	1233	delete d;
1068	break;	1234	break;
1069	}	1235	}
…		…
1073	break;	1239	break;
1074		1240
1075	case vpn_packet::PT_CONNECT_REQ:	1241	case vpn_packet::PT_CONNECT_REQ:
1076	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1242	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1077	{	1243	{
1078	connect_req_packet p = (connect_req_packet ) pkt;	1244	connect_req_packet p = (connect_req_packet )pkt;
1079		1245
1080	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1246	if (p->id > 0 && p->id <= vpn->conns.size ())
1081	connection *c = vpn->conns[p->id - 1];
1082	conf->protocols = p->protocols;
1083
1084	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1085	conf->id, p->id, c->ictx && c->octx);
1086
1087	if (c->ictx && c->octx)
1088	{	1247	{
		1248	connection *c = vpn->conns[p->id - 1];
		1249	conf->protocols = p->protocols;
		1250
		1251	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1252	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1253	p->protocols,
		1254	c->ictx && c->octx);
		1255
		1256	if (c->ictx && c->octx)
		1257	{
1089	// send connect_info packets to both sides, in case one is	1258	// send connect_info packets to both sides, in case one is
1090	// behind a nat firewall (or both ;)	1259	// behind a nat firewall (or both ;)
1091	c->send_connect_info (conf->id, si, conf->protocols);	1260	c->send_connect_info (conf->id, si, conf->protocols);
1092	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1261	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1262	}
		1263	else
		1264	c->establish_connection ();
1093	}	1265	}
1094	else	1266	else
1095	c->establish_connection ();	1267	slog (L_WARN,
		1268	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1269	p->id);
1096	}	1270	}
1097		1271
1098	break;	1272	break;
1099		1273
1100	case vpn_packet::PT_CONNECT_INFO:	1274	case vpn_packet::PT_CONNECT_INFO:
1101	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1275	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1102	{	1276	{
1103	connect_info_packet p = (connect_info_packet ) pkt;	1277	connect_info_packet p = (connect_info_packet )pkt;
1104		1278
1105	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1279	if (p->id > 0 && p->id <= vpn->conns.size ())
1106		1280	{
1107	connection *c = vpn->conns[p->id - 1];	1281	connection *c = vpn->conns[p->id - 1];
1108		1282
1109	c->conf->protocols = p->protocols;	1283	c->conf->protocols = p->protocols;
1110	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1284	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1111	p->si.upgrade_protocol (protocol, c->conf);	1285	p->si.upgrade_protocol (protocol, c->conf);
1112		1286
1113	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1287	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1114	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1288	conf->nodename,
		1289	vpn->conns[p->id - 1]->conf->nodename,
		1290	(const char *)p->si,
		1291	p->protocols,
		1292	protocol,
		1293	p->si.supported_protocols (c->conf),
		1294	!c->ictx && !c->octx);
1115		1295
1116	const sockinfo &dsi = forward_si (p->si);	1296	const sockinfo &dsi = forward_si (p->si);
1117		1297
1118	if (dsi.valid ())	1298	if (dsi.valid ())
1119	c->send_auth_request (dsi, true);	1299	c->send_auth_request (dsi, true);
		1300	else
		1301	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1302	vpn->conns[p->id - 1]->conf->nodename,
		1303	(const char *)p->si);
		1304	}
		1305	else
		1306	slog (L_WARN,
		1307	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1308	p->id);
1120	}	1309	}
1121		1310
1122	break;	1311	break;
1123		1312
1124	default:	1313	default:
1125	send_reset (rsi);	1314	send_reset (rsi);
1126	break;	1315	break;
1127	}	1316	}
1128	}	1317	}
1129		1318
1130	void connection::keepalive_cb (time_watcher &w)	1319	inline void
		1320	connection::keepalive_cb (ev::timer &w, int revents)
1131	{	1321	{
1132	if (NOW >= last_activity + ::conf.keepalive + 30)	1322	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1323
		1324	if (when >= 0)
		1325	w.start (when);
		1326	else if (when < -15)
1133	{	1327	{
1134	reset_connection ();	1328	reset_connection ();
1135	establish_connection ();	1329	establish_connection ();
1136	}	1330	}
1137	else if (NOW < last_activity + ::conf.keepalive)
1138	w.start (last_activity + ::conf.keepalive);
1139	else if (conf->connectmode != conf_node::C_ONDEMAND	1331	else if (conf->connectmode != conf_node::C_ONDEMAND
1140	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1332	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1141	{	1333	{
		1334	w.start (3);
1142	send_ping (si);	1335	send_ping (si);
1143	w.start (NOW + 5);
1144	}	1336	}
1145	else if (NOW < last_activity + ::conf.keepalive + 10)	1337	else if (when >= -10)
1146	// hold ondemand connections implicitly a few seconds longer	1338	// hold ondemand connections implicitly a few seconds longer
1147	// should delete octx, though, or something like that ;)	1339	// should delete octx, though, or something like that ;)
1148	w.start (last_activity + ::conf.keepalive + 10);	1340	w.start (when + 10);
1149	else	1341	else
1150	reset_connection ();	1342	reset_connection ();
1151	}	1343	}
1152		1344
		1345	void
1153	void connection::send_connect_request (int id)	1346	connection::send_connect_request (int id)
1154	{	1347	{
1155	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1348	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1156		1349
1157	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1350	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1351	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1352	THISNODE->protocols);
1158	p->hmac_set (octx);	1353	p->hmac_set (octx);
1159	send_vpn_packet (p, si);	1354	send_vpn_packet (p, si);
1160		1355
1161	delete p;	1356	delete p;
1162	}	1357	}
1163		1358
1164	void connection::script_node ()	1359	void
		1360	connection::script_init_env (const char *ext)
1165	{	1361	{
1166	vpn->script_if_up ();
1167
1168	char *env;	1362	char *env;
		1363	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1364	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1365	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1366	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1367	conf->id & 0xff); putenv (env);
		1368	}
		1369
		1370	void
		1371	connection::script_init_connect_env ()
		1372	{
		1373	vpn->script_init_env ();
		1374
		1375	char *env;
1169	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1376	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1377	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1170	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1378	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1171	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1379	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1172	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1380	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1173	}	1381	}
1174		1382
		1383	inline const char *
1175	const char *connection::script_node_up ()	1384	connection::script_node_up ()
1176	{	1385	{
1177	script_node ();	1386	script_init_connect_env ();
1178		1387
1179	putenv ("STATE=up");	1388	putenv ((char *)"STATE=up");
1180		1389
		1390	char *filename;
		1391	asprintf (&filename,
		1392	"%s/%s",
		1393	confbase,
1181	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1394	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1182	}
1183		1395
		1396	return filename;
		1397	}
		1398
		1399	inline const char *
		1400	connection::script_node_change ()
		1401	{
		1402	script_init_connect_env ();
		1403
		1404	putenv ((char *)"STATE=change");
		1405
		1406	char *filename;
		1407	asprintf (&filename,
		1408	"%s/%s",
		1409	confbase,
		1410	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1411
		1412	return filename;
		1413	}
		1414
		1415	inline const char *
1184	const char *connection::script_node_down ()	1416	connection::script_node_down ()
1185	{	1417	{
1186	script_node ();	1418	script_init_connect_env ();
1187		1419
1188	putenv ("STATE=down");	1420	putenv ((char *)"STATE=down");
1189		1421
1190	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1422	char *filename;
1191	}	1423	asprintf (&filename,
		1424	"%s/%s",
		1425	confbase,
		1426	::conf.script_node_down ? ::conf.script_node_down : "node-down");
1192		1427
		1428	return filename;
		1429	}
		1430
1193	connection::connection(struct vpn *vpn_)	1431	connection::connection (struct vpn vpn, conf_node conf)
1194	: vpn(vpn_)	1432	: vpn(vpn), conf(conf),
1195	, rekey (this, &connection::rekey_cb)	1433	#if ENABLE_DNS
1196	, keepalive (this, &connection::keepalive_cb)	1434	dns (0),
		1435	#endif
		1436	data_queue(conf->max_ttl, conf->max_queue + 1),
		1437	vpn_queue(conf->max_ttl, conf->max_queue + 1)
		1438	{
		1439	rekey .set<connection, &connection::rekey_cb > (this);
		1440	keepalive .set<connection, &connection::keepalive_cb > (this);
1197	, establish_connection (this, &connection::establish_connection_cb)	1441	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1198	{	1442
		1443	last_establish_attempt = 0.;
1199	octx = ictx = 0;	1444	octx = ictx = 0;
1200	retry_cnt = 0;
1201		1445
1202	connectmode = conf_node::C_ALWAYS; // initial setting	1446	connectmode = conf->connectmode;
		1447
		1448	// queue a dummy packet to force an initial connection attempt
		1449	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1450	vpn_queue.put (new net_packet);
		1451
1203	reset_connection ();	1452	reset_connection ();
1204	}	1453	}
1205		1454
1206	connection::~connection ()	1455	connection::~connection ()
1207	{	1456	{
1208	shutdown ();	1457	shutdown ();
1209	}	1458	}
1210		1459
		1460	void
1211	void connection_init ()	1461	connection_init ()
1212	{	1462	{
1213	auth_rate_limiter.clear ();	1463	auth_rate_limiter.clear ();
1214	reset_rate_limiter.clear ();	1464	reset_rate_limiter.clear ();
1215	}	1465	}
1216		1466

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Comparing gvpe/src/connection.C (file contents): Revision 1.38 by pcg, Sun Jul 25 18:11:40 2004 UTC vs. Revision 1.101 by root, Wed Jul 17 16:40:57 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.38 by pcg, Sun Jul 25 18:11:40 2004 UTC vs.
Revision 1.101 by root, Wed Jul 17 16:40:57 2013 UTC