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

Comparing gvpe/src/connection.C (file contents):
Revision 1.43 by pcg, Fri Mar 4 04:52:38 2005 UTC vs.
Revision 1.99 by root, Wed Jul 17 04:36:03 2013 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
5	This file is part of GVPE.	5	This file is part of GVPE.
6		6
7	GVPE is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
8	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
9	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
10	(at your option) any later version.	10	option) any later version.
11		11
12	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15	GNU General Public License for more details.	15	Public License for more details.
16		16
17	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
18	along with gvpe; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
19	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <cassert>
25
26	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
27		37
28	#include <openssl/rand.h>	38	#include <openssl/rand.h>
29	#include <openssl/evp.h>	39	#include <openssl/evp.h>
30	#include <openssl/rsa.h>	40	#include <openssl/rsa.h>
31	#include <openssl/err.h>	41	#include <openssl/err.h>
32
33	#include "gettext.h"
34		42
35	#include "conf.h"	43	#include "conf.h"
36	#include "slog.h"	44	#include "slog.h"
37	#include "device.h"	45	#include "device.h"
38	#include "vpn.h"	46	#include "vpn.h"
39	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
40		49
41	#include "netcompat.h"	50	#include "netcompat.h"
42		51
43	#if !HAVE_RAND_PSEUDO_BYTES
44	# define RAND_pseudo_bytes RAND_bytes
45	#endif
46
47	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	52	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
48		53
49	#define ULTRA_FAST 1	54	#define ULTRA_FAST 1
50	#define HLOG 15	55	#define HLOG 15
51	#include "lzf/lzf.h"	56	#include "lzf/lzf.h"
52	#include "lzf/lzf_c.c"	57	#include "lzf/lzf_c.c"
53	#include "lzf/lzf_d.c"	58	#include "lzf/lzf_d.c"
54		59
		60	//////////////////////////////////////////////////////////////////////////////
		61
		62	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		63	static ev::child rs_child_ev;
		64
		65	namespace
		66	{
		67	void // c++ requires external linkage here, apparently :(
		68	rs_child_cb (ev::child &w, int revents)
		69	{
		70	w.stop ();
		71
		72	if (rs_queue.empty ())
		73	return;
		74
		75	pid_t pid = run_script (*rs_queue.front ().first, false);
		76	if (pid)
		77	{
		78	w.set (pid);
		79	w.start ();
		80	}
		81	else
		82	slog (L_WARN, rs_queue.front ().second);
		83
		84	delete rs_queue.front ().first;
		85	rs_queue.pop ();
		86	}
		87	};
		88
		89	// despite the fancy name, this is quite a hack
		90	static void
		91	run_script_queued (run_script_cb cb, const char warnmsg)
		92	{
		93	rs_queue.push (std::make_pair (cb, warnmsg));
		94
		95	if (!rs_child_ev.is_active ())
		96	{
		97	rs_child_ev.set<rs_child_cb> ();
		98	rs_child_ev ();
		99	}
		100	}
		101
		102	//////////////////////////////////////////////////////////////////////////////
		103
55	struct crypto_ctx	104	struct crypto_ctx
56	{	105	{
57	EVP_CIPHER_CTX cctx;	106	EVP_CIPHER_CTX cctx;
58	HMAC_CTX hctx;	107	HMAC_CTX hctx;
59		108
60	crypto_ctx (const rsachallenge &challenge, int enc);	109	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
61	~crypto_ctx ();	110	~crypto_ctx ();
62	};	111	};
63		112
64	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	113	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
65	{	114	{
		115	ecdh_key s;
		116
		117	curve25519_combine (a, b, s);
		118
		119	{
		120	u8 mac_key[MAC_KEYSIZE];
		121	static const unsigned char mac_info[] = "gvpe mac key";
		122
		123	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		124	kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		125	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		126	kdf.extract (s, sizeof (s));
		127	kdf.extract_done (HKDF_PRF_HASH ());
		128	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		129
		130	HMAC_CTX_init (&hctx);
		131	require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		132	}
		133
		134	{
		135	u8 cipher_key[CIPHER_KEYSIZE];
		136	static const unsigned char cipher_info[] = "gvpe cipher key";
		137
		138	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		139	kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		140	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		141	kdf.extract (s, sizeof (s));
		142	kdf.extract_done (HKDF_PRF_HASH ());
		143	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		144
66	EVP_CIPHER_CTX_init (&cctx);	145	EVP_CIPHER_CTX_init (&cctx);
67	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	146	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
68	HMAC_CTX_init (&hctx);	147	}
69	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
70	}	148	}
71		149
72	crypto_ctx::~crypto_ctx ()	150	crypto_ctx::~crypto_ctx ()
73	{	151	{
74	require (EVP_CIPHER_CTX_cleanup (&cctx));	152	require (EVP_CIPHER_CTX_cleanup (&cctx));
75	HMAC_CTX_cleanup (&hctx);	153	HMAC_CTX_cleanup (&hctx);
76	}	154	}
77		155
		156	static inline void
		157	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		158	{
		159	if (RSA_public_encrypt (sizeof (auth.rsa),
		160	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		161	key, RSA_PKCS1_OAEP_PADDING) < 0)
		162	fatal ("RSA_public_encrypt error");
		163	}
		164
		165	static inline bool
		166	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		167	{
		168	u8 rsa_decrypt[RSA_KEYLEN];
		169
		170	if (RSA_private_decrypt (sizeof (encr.rsa),
		171	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		172	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		173	return 0;
		174
		175	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		176
		177	return 1;
		178	}
		179
78	static void	180	static void
79	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	181	auth_hash (const auth_data &auth, auth_mac &mac)
80	{	182	{
81	EVP_MD_CTX ctx;	183	HMAC_CTX ctx;
82		184
83	EVP_MD_CTX_init (&ctx);	185	HMAC_CTX_init (&ctx);
84	require (EVP_DigestInit (&ctx, RSA_HASH));	186	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
85	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));	187	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
86	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
87	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	188	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
88	EVP_MD_CTX_cleanup (&ctx);	189	HMAC_CTX_cleanup (&ctx);
89	}	190	}
90		191
91	struct rsa_entry {	192	void
92	tstamp expire;	193	connection::generate_auth_data ()
93	rsaid id;
94	rsachallenge chg;
95	};
96
97	struct rsa_cache : list<rsa_entry>
98	{	194	{
99	void cleaner_cb (time_watcher &w); time_watcher cleaner;	195	if (auth_expire < ev_now ())
100
101	bool find (const rsaid &id, rsachallenge &chg)
102	{
103	for (iterator i = begin (); i != end (); ++i)
104	{
105	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)
106	{
107	memcpy (&chg, &i->chg, sizeof chg);
108
109	erase (i);
110	return true;
111	}
112	}
113
114	if (cleaner.at < NOW)
115	cleaner.start (NOW + RSA_TTL);
116
117	return false;
118	}
119
120	void gen (rsaid &id, rsachallenge &chg)
121	{
122	rsa_entry e;
123
124	RAND_bytes ((unsigned char *)&id, sizeof id);
125	RAND_bytes ((unsigned char *)&chg, sizeof chg);
126
127	e.expire = NOW + RSA_TTL;
128	e.id = id;
129	memcpy (&e.chg, &chg, sizeof chg);
130
131	push_back (e);
132
133	if (cleaner.at < NOW)
134	cleaner.start (NOW + RSA_TTL);
135	}
136
137	rsa_cache ()
138	: cleaner (this, &rsa_cache::cleaner_cb)
139	{ }	196	{
		197	// request data
		198	RAND_bytes ((unsigned char *)&snd_auth.rsa, sizeof snd_auth.rsa);
		199	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
		200	auth_hash (snd_auth, snd_auth_mac);
140		201
141	} rsa_cache;	202	// eventual response data
142		203	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
143	void rsa_cache::cleaner_cb (time_watcher &w)
144	{
145	if (!empty ())
146	{	204	}
147	w.start (NOW + RSA_TTL);
148		205
149	for (iterator i = begin (); i != end (); )	206	// every use prolongs the expiry
150	if (i->expire <= NOW)	207	auth_expire = ev_now () + AUTH_TTL;
151	i = erase (i);
152	else
153	++i;
154	}
155	}	208	}
156		209
157	//////////////////////////////////////////////////////////////////////////////	210	//////////////////////////////////////////////////////////////////////////////
158		211
159	void pkt_queue::put (net_packet *p)	212	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		213	: max_ttl (max_ttl), max_queue (max_queue)
160	{	214	{
161	if (queue[i])	215	queue = new pkt [max_queue];
162	{
163	delete queue[i];
164	j = (j + 1) % QUEUEDEPTH;
165	}
166		216
167	queue[i] = p;
168
169	i = (i + 1) % QUEUEDEPTH;
170	}
171
172	net_packet *pkt_queue::get ()
173	{
174	net_packet *p = queue[j];
175
176	if (p)
177	{
178	queue[j] = 0;
179	j = (j + 1) % QUEUEDEPTH;
180	}
181
182	return p;
183	}
184
185	pkt_queue::pkt_queue ()
186	{
187	memset (queue, 0, sizeof (queue));
188	i = 0;	217	i = 0;
189	j = 0;	218	j = 0;
		219
		220	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
190	}	221	}
191		222
192	pkt_queue::~pkt_queue ()	223	pkt_queue::~pkt_queue ()
193	{	224	{
194	for (i = QUEUEDEPTH; --i > 0; )	225	while (net_packet *p = get ())
		226	delete p;
		227
195	delete queue[i];	228	delete [] queue;
196	}	229	}
197		230
		231	void
		232	pkt_queue::expire_cb (ev::timer &w, int revents)
		233	{
		234	ev_tstamp expire = ev_now () - max_ttl;
		235
		236	for (;;)
		237	{
		238	if (empty ())
		239	break;
		240
		241	double diff = queue[j].tstamp - expire;
		242
		243	if (diff >= 0.)
		244	{
		245	w.start (diff > 0.5 ? diff : 0.5);
		246	break;
		247	}
		248
		249	delete get ();
		250	}
		251	}
		252
		253	void
		254	pkt_queue::put (net_packet *p)
		255	{
		256	ev_tstamp now = ev_now ();
		257
		258	// start expiry timer
		259	if (empty ())
		260	expire.start (max_ttl);
		261
		262	int ni = i + 1 == max_queue ? 0 : i + 1;
		263
		264	if (ni == j)
		265	delete get ();
		266
		267	queue[i].pkt = p;
		268	queue[i].tstamp = now;
		269
		270	i = ni;
		271	}
		272
		273	net_packet *
		274	pkt_queue::get ()
		275	{
		276	if (empty ())
		277	return 0;
		278
		279	net_packet *p = queue[j].pkt;
		280	queue[j].pkt = 0;
		281
		282	j = j + 1 == max_queue ? 0 : j + 1;
		283
		284	return p;
		285	}
		286
198	struct net_rateinfo {	287	struct net_rateinfo
		288	{
199	u32 host;	289	u32 host;
200	double pcnt, diff;	290	double pcnt, diff;
201	tstamp last;	291	tstamp last;
202	};	292	};
203		293
213		303
214	bool can (const sockinfo &si) { return can((u32)si.host); }	304	bool can (const sockinfo &si) { return can((u32)si.host); }
215	bool can (u32 host);	305	bool can (u32 host);
216	};	306	};
217		307
218	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	308	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
219		309
		310	bool
220	bool net_rate_limiter::can (u32 host)	311	net_rate_limiter::can (u32 host)
221	{	312	{
222	iterator i;	313	iterator i;
223		314
224	for (i = begin (); i != end (); )	315	for (i = begin (); i != end (); )
225	if (i->host == host)	316	if (i->host == host)
226	break;	317	break;
227	else if (i->last < NOW - NRL_EXPIRE)	318	else if (i->last < ev_now () - NRL_EXPIRE)
228	i = erase (i);	319	i = erase (i);
229	else	320	else
230	i++;	321	i++;
231		322
232	if (i == end ())	323	if (i == end ())
…		…
234	net_rateinfo ri;	325	net_rateinfo ri;
235		326
236	ri.host = host;	327	ri.host = host;
237	ri.pcnt = 1.;	328	ri.pcnt = 1.;
238	ri.diff = NRL_MAXDIF;	329	ri.diff = NRL_MAXDIF;
239	ri.last = NOW;	330	ri.last = ev_now ();
240		331
241	push_front (ri);	332	push_front (ri);
242		333
243	return true;	334	return true;
244	}	335	}
…		…
246	{	337	{
247	net_rateinfo ri (*i);	338	net_rateinfo ri (*i);
248	erase (i);	339	erase (i);
249		340
250	ri.pcnt = ri.pcnt * NRL_ALPHA;	341	ri.pcnt = ri.pcnt * NRL_ALPHA;
251	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	342	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
252		343
253	ri.last = NOW;	344	ri.last = ev_now ();
254		345
255	double dif = ri.diff / ri.pcnt;	346	double dif = ri.diff / ri.pcnt;
256		347
257	bool send = dif > NRL_CUTOFF;	348	bool send = dif > NRL_CUTOFF;
258		349
…		…
272		363
273	/////////////////////////////////////////////////////////////////////////////	364	/////////////////////////////////////////////////////////////////////////////
274		365
275	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	366	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
276		367
		368	void
277	void hmac_packet::hmac_gen (crypto_ctx *ctx)	369	hmac_packet::hmac_gen (crypto_ctx *ctx)
278	{	370	{
279	unsigned int xlen;	371	unsigned int xlen;
280		372
281	HMAC_CTX *hctx = &ctx->hctx;	373	HMAC_CTX *hctx = &ctx->hctx;
282		374
283	HMAC_Init_ex (hctx, 0, 0, 0, 0);	375	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
284	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	376	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
285	len - sizeof (hmac_packet));	377	len - sizeof (hmac_packet)));
286	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	378	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
287	}	379	}
288		380
289	void	381	void
290	hmac_packet::hmac_set (crypto_ctx *ctx)	382	hmac_packet::hmac_set (crypto_ctx *ctx)
291	{	383	{
…		…
300	hmac_gen (ctx);	392	hmac_gen (ctx);
301		393
302	return !memcmp (hmac, hmac_digest, HMACLENGTH);	394	return !memcmp (hmac, hmac_digest, HMACLENGTH);
303	}	395	}
304		396
		397	void
305	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	398	vpn_packet::set_hdr (ptype type_, unsigned int dst)
306	{	399	{
307	type = type_;	400	type = type_;
308		401
309	int src = THISNODE->id;	402	int src = THISNODE->id;
310		403
…		…
315		408
316	#define MAXVPNDATA (MAX_MTU - 6 - 6)	409	#define MAXVPNDATA (MAX_MTU - 6 - 6)
317	#define DATAHDR (sizeof (u32) + RAND_SIZE)	410	#define DATAHDR (sizeof (u32) + RAND_SIZE)
318		411
319	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
320	{	421	{
321	u8 data[MAXVPNDATA + DATAHDR]; // seqno
322
323	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
324	tap_packet unpack (connection conn, u32 &seqno);
325	private:
326
327	const u32 data_hdr_size () const
328	{
329	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	422	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
330	}
331	};	423	}
		424	};
332		425
333	void	426	void
334	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)
335	{	428	{
336	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	429	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
338	ptype type = PT_DATA_UNCOMPRESSED;	431	ptype type = PT_DATA_UNCOMPRESSED;
339		432
340	#if ENABLE_COMPRESSION	433	#if ENABLE_COMPRESSION
341	u8 cdata[MAX_MTU];	434	u8 cdata[MAX_MTU];
342		435
343	if (conn->features & ENABLE_COMPRESSION)	436	if (conn->features & FEATURE_COMPRESSION)
344	{	437	{
345	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	438	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
346		439
347	if (cl)	440	if (cl)
348	{	441	{
…		…
354	d[1] = cl;	447	d[1] = cl;
355	}	448	}
356	}	449	}
357	#endif	450	#endif
358		451
359	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	452	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
360		453
361	struct {	454	struct {
362	#if RAND_SIZE	455	#if RAND_SIZE
363	u8 rnd[RAND_SIZE];	456	u8 rnd[RAND_SIZE];
364	#endif	457	#endif
365	u32 seqno;	458	u32 seqno;
366	} datahdr;	459	} datahdr;
367		460
368	datahdr.seqno = ntohl (seqno);	461	datahdr.seqno = ntohl (seqno);
369	#if RAND_SIZE	462	#if RAND_SIZE
370	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	463	RAND_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);
371	#endif	464	#endif
372		465
373	require (EVP_EncryptUpdate (cctx,	466	require (EVP_EncryptUpdate (cctx,
374	(unsigned char *) data + outl, &outl2,	467	(unsigned char *) data + outl, &outl2,
375	(unsigned char *) &datahdr, DATAHDR));	468	(unsigned char *) &datahdr, DATAHDR));
…		…
397	int outl = 0, outl2;	490	int outl = 0, outl2;
398	tap_packet *p = new tap_packet;	491	tap_packet *p = new tap_packet;
399	u8 *d;	492	u8 *d;
400	u32 l = len - data_hdr_size ();	493	u32 l = len - data_hdr_size ();
401		494
402	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	495	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
403		496
404	#if ENABLE_COMPRESSION	497	#if ENABLE_COMPRESSION
405	u8 cdata[MAX_MTU];	498	u8 cdata[MAX_MTU];
406		499
407	if (type == PT_DATA_COMPRESSED)	500	if (type == PT_DATA_COMPRESSED)
…		…
449	}	542	}
450	};	543	};
451		544
452	struct config_packet : vpn_packet	545	struct config_packet : vpn_packet
453	{	546	{
454	// actually, hmaclen cannot be checked because the hmac
455	// field comes before this data, so peers with other
456	// hmacs simply will not work.
457	u8 prot_major, prot_minor, randsize, hmaclen;	547	u8 prot_major, prot_minor, randsize;
458	u8 flags, challengelen, features, pad3;	548	u8 flags, features, pad6, pad7, pad8;
459	u32 cipher_nid, digest_nid, hmac_nid;	549	u32 cipher_nid, mac_nid, auth_nid;
460		550
461	void setup (ptype type, int dst);	551	void setup (ptype type, int dst);
462	bool chk_config () const;	552	bool chk_config () const;
463		553
464	static u8 get_features ()	554	static u8 get_features ()
…		…
468	f \|= FEATURE_COMPRESSION;	558	f \|= FEATURE_COMPRESSION;
469	#endif	559	#endif
470	#if ENABLE_ROHC	560	#if ENABLE_ROHC
471	f \|= FEATURE_ROHC;	561	f \|= FEATURE_ROHC;
472	#endif	562	#endif
		563	#if ENABLE_BRIDGING
		564	f \|= FEATURE_BRIDGING;
		565	#endif
473	return f;	566	return f;
474	}	567	}
475	};	568	};
476		569
		570	void
477	void config_packet::setup (ptype type, int dst)	571	config_packet::setup (ptype type, int dst)
478	{	572	{
479	prot_major = PROTOCOL_MAJOR;	573	prot_major = PROTOCOL_MAJOR;
480	prot_minor = PROTOCOL_MINOR;	574	prot_minor = PROTOCOL_MINOR;
481	randsize = RAND_SIZE;	575	randsize = RAND_SIZE;
482	hmaclen = HMACLENGTH;	576	flags = 0;
483	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
484	challengelen = sizeof (rsachallenge);
485	features = get_features ();	577	features = get_features ();
486		578
487	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	579	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
488	digest_nid = htonl (EVP_MD_type (RSA_HASH));
489	hmac_nid = htonl (EVP_MD_type (DIGEST));	580	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		581	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
490		582
491	len = sizeof (*this) - sizeof (net_packet);	583	len = sizeof (*this) - sizeof (net_packet);
492	set_hdr (type, dst);	584	set_hdr (type, dst);
493	}	585	}
494		586
		587	bool
495	bool config_packet::chk_config () const	588	config_packet::chk_config () const
496	{	589	{
497	if (prot_major != PROTOCOL_MAJOR)	590	if (prot_major != PROTOCOL_MAJOR)
498	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	591	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
499	else if (randsize != RAND_SIZE)	592	else if (randsize != RAND_SIZE)
500	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	593	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
501	else if (hmaclen != HMACLENGTH)
502	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
503	#if 0 // this implementation should handle all flag settings
504	else if (flags != curflags ())
505	slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ());
506	#endif
507	else if (challengelen != sizeof (rsachallenge))
508	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
509	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	594	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
510	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	595	slog (L_WARN, _("cipher algo mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
511	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
512	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
513	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	596	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
514	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	597	slog (L_WARN, _("mac algo mismatch (remote %x <=> local %x)"), ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		598	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		599	slog (L_WARN, _("auth algo mismatch (remote %x <=> local %x)"), ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
515	else	600	else
516	return true;	601	return true;
517		602
518	return false;	603	return false;
519	}	604	}
520		605
521	struct auth_req_packet : config_packet	606	struct auth_req_packet : config_packet // UNPROTECTED
522	{	607	{
523	char magic[8];	608	char magic[8];
524	u8 initiate; // false if this is just an automatic reply	609	u8 initiate; // false if this is just an automatic reply
525	u8 protocols; // supported protocols (will be patched on forward)	610	u8 protocols; // supported protocols (will be patched on forward)
526	u8 pad2, pad3;	611	u8 pad2, pad3;
527	rsaid id;	612	auth_encr encr;
528	rsaencrdata encr;
529		613
530	auth_req_packet (int dst, bool initiate_, u8 protocols_)	614	auth_req_packet (int dst, bool initiate_, u8 protocols_)
531	{	615	{
532	config_packet::setup (PT_AUTH_REQ, dst);	616	config_packet::setup (PT_AUTH_REQ, dst);
533	strncpy (magic, MAGIC, 8);	617	memcpy (magic, MAGIC, 8);
534	initiate = !!initiate_;	618	initiate = !!initiate_;
535	protocols = protocols_;	619	protocols = protocols_;
536		620
537	len = sizeof (*this) - sizeof (net_packet);	621	len = sizeof (*this) - sizeof (net_packet);
538	}	622	}
539	};	623	};
540		624
541	struct auth_res_packet : config_packet	625	struct auth_res_packet : config_packet // UNPROTECTED
542	{	626	{
543	rsaid id;
544	u8 pad1, pad2, pad3;
545	u8 response_len; // encrypted length
546	rsaresponse response;	627	auth_response response;
547		628
548	auth_res_packet (int dst)	629	auth_res_packet (int dst)
549	{	630	{
550	config_packet::setup (PT_AUTH_RES, dst);	631	config_packet::setup (PT_AUTH_RES, dst);
551		632
…		…
585	};	666	};
586		667
587	/////////////////////////////////////////////////////////////////////////////	668	/////////////////////////////////////////////////////////////////////////////
588		669
589	void	670	void
590	connection::connection_established ()	671	connection::connection_established (const sockinfo &rsi)
591	{	672	{
		673	if (!have_snd_auth \|\| !have_rcv_auth)
		674	return;
		675
		676	si = rsi;
		677	protocol = rsi.prot;
		678
		679	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		680	conf->nodename, (const char *)rsi,
		681	is_direct ? "direct" : "forwarded",
		682	PROTOCOL_MAJOR, prot_minor);
		683
		684	if (::conf.script_node_up)
		685	{
		686	run_script_cb *cb = new run_script_cb;
		687	cb->set<connection, &connection::script_node_up> (this);
		688	run_script_queued (cb, _("node-up command execution failed, continuing."));
		689	}
		690
		691	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		692	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		693
		694	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		695	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		696
592	if (ictx && octx)	697	if (ictx && octx)
593	{	698	{
594	connectmode = conf->connectmode;
595
596	// make sure rekeying timeouts are slightly asymmetric	699	// make sure rekeying timeouts are slightly asymmetric
597	rekey.start (NOW + ::conf.rekey	700	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
598	+ (conf->id > THISNODE->id ? 10 : 0));	701	rekey.start (rekey_interval, rekey_interval);
		702
599	keepalive.start (NOW + ::conf.keepalive);	703	keepalive.start (::conf.keepalive);
600		704
601	// send queued packets	705	// send queued packets
602	if (ictx && octx)	706	if (ictx && octx)
603	{	707	{
604	while (tap_packet p = (tap_packet )data_queue.get ())	708	while (tap_packet p = (tap_packet )data_queue.get ())
605	{	709	{
606	send_data_packet (p);	710	if (p->len) send_data_packet (p);
607	delete p;	711	delete p;
608	}	712	}
609		713
610	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	714	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
611	{	715	{
612	send_vpn_packet (p, si, IPTOS_RELIABILITY);	716	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
613	delete p;	717	delete p;
614	}	718	}
615	}	719	}
		720
		721	vpn->connection_established (this);
616	}	722	}
		723	#if 0
617	else	724	else
618	{	725	{
619	retry_cnt = 0;	726	retry_cnt = 0;
620	establish_connection.start (NOW + 5);	727	establish_connection.start (5);
621	keepalive.stop ();	728	keepalive.stop ();
622	rekey.stop ();	729	rekey.stop ();
623	}	730	}
		731	#endif
624	}	732	}
625		733
626	void	734	void
627	connection::reset_si ()	735	connection::reset_si ()
628	{	736	{
		737	if (vpn->can_direct (THISNODE, conf))
629	protocol = best_protocol (THISNODE->protocols & conf->protocols);	738	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
630		739	else
631	// mask out protocols we cannot establish	740	{
632	if (!conf->udp_port) protocol &= ~PROT_UDPv4;	741	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
633	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;	742	protocol = 0;
634	if (!conf->dns_port) protocol &= ~PROT_DNSv4;	743	}
635		744
636	si.set (conf, protocol);	745	si.set (conf, protocol);
		746
		747	is_direct = si.valid ();
637	}	748	}
638		749
639	// ensure sockinfo is valid, forward if necessary	750	// ensure sockinfo is valid, forward if necessary
640	const sockinfo &	751	const sockinfo &
641	connection::forward_si (const sockinfo &si) const	752	connection::forward_si (const sockinfo &si) const
642	{	753	{
643	if (!si.valid ())	754	if (!si.valid ())
644	{	755	{
645	connection *r = vpn->find_router ();	756	connection *r = vpn->find_router_for (this);
646		757
647	if (r)	758	if (r)
648	{	759	{
649	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	760	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
650	conf->nodename, r->conf->nodename);	761	conf->nodename, r->conf->nodename);
651	return r->si;	762	return r->si;
652	}	763	}
653	else	764	else
654	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	765	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
655	conf->nodename);	766	conf->nodename);
656	}	767	}
657		768
658	return si;	769	return si;
659	}	770	}
660		771
661	void	772	void
662	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	773	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
663	{	774	{
664	bool ok;	775	if (!vpn->send_vpn_packet (pkt, si, tos))
665
666	switch (si.prot)
667	{
668	case PROT_IPv4:
669	ok = vpn->send_ipv4_packet (pkt, si, tos); break;
670	case PROT_UDPv4:
671	ok = vpn->send_udpv4_packet (pkt, si, tos); break;
672	#if ENABLE_TCP
673	case PROT_TCPv4:
674	ok = vpn->send_tcpv4_packet (pkt, si, tos); break;
675	#endif
676	#if ENABLE_ICMP
677	case PROT_ICMPv4:
678	ok = vpn->send_icmpv4_packet (pkt, si, tos); break;
679	#endif
680	#if ENABLE_DNS
681	case PROT_DNSv4:
682	ok = send_dnsv4_packet (pkt, si, tos); break;
683	#endif
684
685	default:
686	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
687	ok = false;
688	}
689
690	if (!ok)
691	reset_connection ();	776	reset_connection ();
692	}	777	}
693		778
694	void	779	void
695	connection::send_ping (const sockinfo &si, u8 pong)	780	connection::send_ping (const sockinfo &si, u8 pong)
696	{	781	{
697	ping_packet *pkt = new ping_packet;	782	ping_packet *pkt = new ping_packet;
698		783
699	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	784	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		785
		786	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
700	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	787	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
701		788
702	delete pkt;	789	delete pkt;
703	}	790	}
704		791
…		…
719	void	806	void
720	connection::send_auth_request (const sockinfo &si, bool initiate)	807	connection::send_auth_request (const sockinfo &si, bool initiate)
721	{	808	{
722	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	809	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
723		810
724	rsachallenge chg;	811	generate_auth_data ();
725	rsa_cache.gen (pkt->id, chg);
726	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	812	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
727		813
728	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	814	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
729
730	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	815	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
731		816
732	delete pkt;	817	delete pkt;
733	}	818	}
734		819
735	void	820	void
736	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	821	connection::send_auth_response (const sockinfo &si)
737	{	822	{
738	auth_res_packet *pkt = new auth_res_packet (conf->id);	823	auth_res_packet *pkt = new auth_res_packet (conf->id);
739		824
740	pkt->id = id;	825	auth_hash (rcv_auth, pkt->response.mac);
		826	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
741		827
742	rsa_hash (id, chg, pkt->response);
743
744	pkt->hmac_set (octx);
745
746	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	828	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
747
748	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	829	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
749		830
750	delete pkt;	831	delete pkt;
751	}	832	}
752		833
753	void	834	void
754	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	835	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
755	{	836	{
756	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	837	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
757	conf->id, rid, (const char *)rsi);	838	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		839	conf->protocols);
758		840
759	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	841	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
760		842
761	r->hmac_set (octx);	843	r->hmac_set (octx);
762	send_vpn_packet (r, si);	844	send_vpn_packet (r, si);
763		845
764	delete r;	846	delete r;
765	}	847	}
766		848
767	void	849	inline void
768	connection::establish_connection_cb (time_watcher &w)	850	connection::establish_connection_cb (ev::timer &w, int revents)
769	{	851	{
770	if (!ictx	852	if (!(ictx && octx)
771	&& conf != THISNODE	853	&& conf != THISNODE
772	&& connectmode != conf_node::C_NEVER	854	&& connectmode != conf_node::C_NEVER
773	&& connectmode != conf_node::C_DISABLED	855	&& connectmode != conf_node::C_DISABLED
774	&& NOW > w.at)	856	&& !w.is_active ())
775	{	857	{
776	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	858	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
777		859	// and stop trying. should probably be handled by a per-connection expire handler.
778	if (retry_int < conf->max_retry)	860	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		861	{
		862	reset_connection ();
779	retry_cnt++;	863	return;
780	else	864	}
781	retry_int = conf->max_retry;
782		865
783	w.start (NOW + retry_int);	866	last_establish_attempt = ev_now ();
		867
		868	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		869	? (retry_cnt & 3) + 1
		870	: 1 << (retry_cnt >> 2));
784		871
785	reset_si ();	872	reset_si ();
786		873
787	if (si.prot && !si.host)	874	bool slow = si.prot & PROT_SLOW;
		875
		876	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		877	{
		878	/TODO/ /* start the timer so we don't recurse endlessly */
		879	w.start (1);
788	vpn->send_connect_request (conf->id);	880	vpn->send_connect_request (this);
		881	}
789	else	882	else
790	{	883	{
		884	if (si.valid ())
		885	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		886	conf->nodename, (const char *)si);
		887
791	const sockinfo &dsi = forward_si (si);	888	const sockinfo &dsi = forward_si (si);
		889
		890	slow = slow \|\| (dsi.prot & PROT_SLOW);
792		891
793	if (dsi.valid () && auth_rate_limiter.can (dsi))	892	if (dsi.valid () && auth_rate_limiter.can (dsi))
794	{	893	{
795	if (retry_cnt < 4)	894	if (retry_cnt < 4)
796	send_auth_request (dsi, true);	895	send_auth_request (dsi, true);
797	else	896	else
798	send_ping (dsi, 0);	897	send_ping (dsi, 0);
799	}	898	}
800	}	899	}
		900
		901	retry_int *= slow ? 8. : 0.9;
		902
		903	if (retry_int < conf->max_retry)
		904	retry_cnt++;
		905	else
		906	retry_int = conf->max_retry;
		907
		908	w.start (retry_int);
801	}	909	}
802	}	910	}
803		911
804	void	912	void
805	connection::reset_connection ()	913	connection::reset_connection ()
…		…
808	{	916	{
809	slog (L_INFO, _("%s(%s): connection lost"),	917	slog (L_INFO, _("%s(%s): connection lost"),
810	conf->nodename, (const char *)si);	918	conf->nodename, (const char *)si);
811		919
812	if (::conf.script_node_down)	920	if (::conf.script_node_down)
813	run_script (run_script_cb (this, &connection::script_node_down), false);	921	{
		922	run_script_cb *cb = new run_script_cb;
		923	cb->set<connection, &connection::script_node_down> (this);
		924	run_script_queued (cb, _("node-down command execution failed, continuing."));
		925	}
814	}	926	}
815		927
816	delete ictx; ictx = 0;	928	delete ictx; ictx = 0;
817	delete octx; octx = 0;	929	delete octx; octx = 0;
818		930
819	si.host = 0;	931	si.host = 0;
820		932
		933	have_snd_auth = false;
		934	have_rcv_auth = false;
		935	auth_expire = 0.;
		936
821	last_activity = 0;	937	last_activity = 0.;
		938	//last_si_change = 0.;
822	retry_cnt = 0;	939	retry_cnt = 0;
823		940
824	rekey.stop ();	941	rekey.stop ();
825	keepalive.stop ();	942	keepalive.stop ();
826	establish_connection.stop ();	943	establish_connection.stop ();
…		…
833	send_reset (si);	950	send_reset (si);
834		951
835	reset_connection ();	952	reset_connection ();
836	}	953	}
837		954
838	void	955	// poor-man's rekeying
839	connection::rekey_cb (time_watcher &w)	956	inline void
		957	connection::rekey_cb (ev::timer &w, int revents)
840	{	958	{
841	reset_connection ();	959	reset_connection ();
842	establish_connection ();	960	establish_connection ();
843	}	961	}
844		962
…		…
860	if (oseqno > MAX_SEQNO)	978	if (oseqno > MAX_SEQNO)
861	rekey ();	979	rekey ();
862	}	980	}
863		981
864	void	982	void
		983	connection::post_inject_queue ()
		984	{
		985	// force a connection every now and when when packets are sent (max 1/s)
		986	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		987	establish_connection.stop ();
		988
		989	establish_connection ();
		990	}
		991
		992	void
865	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	993	connection::inject_data_packet (tap_packet *pkt)
866	{	994	{
867	if (ictx && octx)	995	if (ictx && octx)
868	send_data_packet (pkt);	996	send_data_packet (pkt);
869	else	997	else
870	{	998	{
871	if (!broadcast)//DDDD
872	data_queue.put (new tap_packet (*pkt));	999	data_queue.put (new tap_packet (*pkt));
873		1000	post_inject_queue ();
874	establish_connection ();
875	}	1001	}
876	}	1002	}
877		1003
		1004	void
878	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1005	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
879	{	1006	{
880	if (ictx && octx)	1007	if (ictx && octx)
881	send_vpn_packet (pkt, si, tos);	1008	send_vpn_packet (pkt, si, tos);
882	else	1009	else
883	{	1010	{
884	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1011	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
885		1012	post_inject_queue ();
886	establish_connection ();
887	}	1013	}
888	}	1014	}
889		1015
890	void	1016	void
891	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1017	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
892	{	1018	{
893	last_activity = NOW;	1019	last_activity = ev_now ();
894		1020
895	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1021	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
896	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1022	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1023
		1024	if (connectmode == conf_node::C_DISABLED)
		1025	return;
897		1026
898	switch (pkt->typ ())	1027	switch (pkt->typ ())
899	{	1028	{
900	case vpn_packet::PT_PING:	1029	case vpn_packet::PT_PING:
		1030	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1031
901	// we send pings instead of auth packets after some retries,	1032	// we send pings instead of auth packets after some retries,
902	// so reset the retry counter and establish a connection	1033	// so reset the retry counter and establish a connection
903	// when we receive a ping.	1034	// when we receive a ping.
904	if (!ictx)	1035	if (!ictx)
905	{	1036	{
906	if (auth_rate_limiter.can (rsi))	1037	if (auth_rate_limiter.can (rsi))
907	send_auth_request (rsi, true);	1038	send_auth_request (rsi, true);
908	}	1039	}
909	else	1040	else
		1041	// we would love to change the socket address here, but ping's aren't
		1042	// authenticated, so we best ignore it.
910	send_ping (rsi, 1); // pong	1043	send_ping (rsi, 1); // pong
911		1044
912	break;	1045	break;
913		1046
914	case vpn_packet::PT_PONG:	1047	case vpn_packet::PT_PONG:
		1048	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1049
		1050	// a PONG might mean that the other side doesn't really know
		1051	// about our desire for communication.
		1052	establish_connection ();
915	break;	1053	break;
916		1054
917	case vpn_packet::PT_RESET:	1055	case vpn_packet::PT_RESET:
918	{	1056	{
919	reset_connection ();	1057	reset_connection ();
920		1058
921	config_packet p = (config_packet ) pkt;	1059	config_packet p = (config_packet ) pkt;
922		1060
923	if (!p->chk_config ())	1061	if (!p->chk_config ())
924	{	1062	{
925	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1063	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
926	conf->nodename, (const char *)rsi);	1064	conf->nodename, (const char *)rsi);
927	connectmode = conf_node::C_DISABLED;	1065	connectmode = conf_node::C_DISABLED;
928	}	1066	}
929	else if (connectmode == conf_node::C_ALWAYS)	1067	else if (connectmode == conf_node::C_ALWAYS)
930	establish_connection ();	1068	establish_connection ();
…		…
932	break;	1070	break;
933		1071
934	case vpn_packet::PT_AUTH_REQ:	1072	case vpn_packet::PT_AUTH_REQ:
935	if (auth_rate_limiter.can (rsi))	1073	if (auth_rate_limiter.can (rsi))
936	{	1074	{
937	auth_req_packet p = (auth_req_packet ) pkt;	1075	auth_req_packet p = (auth_req_packet )pkt;
938		1076
939	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1077	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1078	conf->nodename, p->initiate ? "initiate" : "reply",
		1079	p->protocols, p->features);
940		1080
941	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1081	if (p->chk_config () && !memcmp (p->magic, MAGIC, 8))
942	{	1082	{
943	if (p->prot_minor != PROTOCOL_MINOR)	1083	if (p->prot_minor != PROTOCOL_MINOR)
944	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1084	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
945	conf->nodename, (const char *)rsi,	1085	conf->nodename, (const char *)rsi,
946	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1086	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
947		1087
948	if (p->initiate)	1088	if (p->initiate)
949	send_auth_request (rsi, false);	1089	send_auth_request (rsi, false);
950		1090
951	rsachallenge k;	1091	auth_data auth;
952		1092
953	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1093	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
954	{	1094	{
955	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1095	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
956	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1096	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
957	break;
958	}	1097	}
959	else	1098	else
960	{	1099	{
961	delete octx;	1100	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
962		1101
963	octx = new crypto_ctx (k, 1);	1102	rcv_auth = auth;
964	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1103	have_rcv_auth = true;
965		1104
966	// compatibility code, remove when no longer required	1105	send_auth_response (rsi);
967	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
968		1106
		1107	if (chg)
		1108	{
969	conf->protocols = p->protocols;	1109	conf->protocols = p->protocols;
970	features = p->features & config_packet::get_features ();	1110	features = p->features & config_packet::get_features ();
971		1111
972	send_auth_response (rsi, p->id, k);
973
974	connection_established ();	1112	connection_established (rsi);
975
976	break;	1113	}
977	}	1114	}
		1115
		1116	break;
978	}	1117	}
979	else	1118	else
980	slog (L_WARN, _("%s(%s): protocol mismatch"),	1119	slog (L_WARN, _("%s(%s): protocol mismatch."),
981	conf->nodename, (const char *)rsi);	1120	conf->nodename, (const char *)rsi);
982		1121
983	send_reset (rsi);	1122	send_reset (rsi);
984	}	1123	}
985		1124
986	break;	1125	break;
987		1126
988	case vpn_packet::PT_AUTH_RES:	1127	case vpn_packet::PT_AUTH_RES:
989	{	1128	{
990	auth_res_packet p = (auth_res_packet ) pkt;	1129	auth_res_packet p = (auth_res_packet )pkt;
991		1130
992	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1131	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
993		1132
994	if (p->chk_config ())	1133	if (p->chk_config ())
995	{	1134	{
996	if (p->prot_minor != PROTOCOL_MINOR)	1135	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
997	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
998	conf->nodename, (const char *)rsi,
999	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
1000
1001	rsachallenge chg;
1002
1003	if (!rsa_cache.find (p->id, chg))
1004	{	1136	{
1005	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1137	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
1006	conf->nodename, (const char *)rsi);	1138	conf->nodename, (const char *)rsi);
1007	break;
1008	}	1139	}
1009	else	1140	else if (!have_snd_auth)
1010	{	1141	{
1011	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1142	if (p->prot_minor != PROTOCOL_MINOR)
1012		1143	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
1013	if (!p->hmac_chk (cctx))
1014	{
1015	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1016	"could be an attack, or just corruption or a synchronization error"),
1017	conf->nodename, (const char *)rsi);	1144	conf->nodename, (const char *)rsi,
1018	break;	1145	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
1019	}
1020	else
1021	{
1022	rsaresponse h;
1023		1146
1024	rsa_hash (p->id, chg, h);
1025
1026	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1027	{
1028	prot_minor = p->prot_minor;	1147	prot_minor = p->prot_minor;
		1148	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
1029		1149
1030	delete ictx; ictx = cctx;	1150	have_snd_auth = true;
1031
1032	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1033
1034	si = rsi;
1035	protocol = rsi.prot;
1036
1037	connection_established ();	1151	connection_established (rsi);
1038
1039	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1040	conf->nodename, (const char *)rsi,
1041	p->prot_major, p->prot_minor);
1042
1043	if (::conf.script_node_up)
1044	run_script (run_script_cb (this, &connection::script_node_up), false);
1045
1046	break;
1047	}
1048	else
1049	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1050	conf->nodename, (const char *)rsi);
1051	}
1052
1053	delete cctx;
1054	}	1152	}
		1153
		1154	break;
1055	}	1155	}
1056	}	1156	}
1057		1157
1058	send_reset (rsi);	1158	send_reset (rsi);
1059	break;	1159	break;
…		…
1070	{	1170	{
1071	vpndata_packet p = (vpndata_packet )pkt;	1171	vpndata_packet p = (vpndata_packet )pkt;
1072		1172
1073	if (!p->hmac_chk (ictx))	1173	if (!p->hmac_chk (ictx))
1074	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1174	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1075	"could be an attack, or just corruption or a synchronization error"),	1175	"could be an attack, or just corruption or a synchronization error."),
1076	conf->nodename, (const char *)rsi);	1176	conf->nodename, (const char *)rsi);
1077	else	1177	else
1078	{	1178	{
1079	u32 seqno;	1179	u32 seqno;
1080	tap_packet *d = p->unpack (this, seqno);	1180	tap_packet *d = p->unpack (this, seqno);
		1181	int seqclass = iseqno.seqno_classify (seqno);
1081		1182
1082	if (iseqno.recv_ok (seqno))	1183	if (seqclass == 0) // ok
1083	{	1184	{
1084	vpn->tap->send (d);	1185	vpn->tap->send (d);
1085		1186
1086	if (si != rsi)	1187	if (si != rsi)
1087	{	1188	{
1088	// fast re-sync on connection changes, useful especially for tcp/ip	1189	// fast re-sync on source address changes, useful especially for tcp/ip
		1190	//if (last_si_change < ev_now () + 5.)
1089	si = rsi;	1191	// {
1090
1091	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1192	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1092	conf->nodename, (const char )si, (const char )rsi);	1193	conf->nodename, (const char )si, (const char )rsi);
		1194
		1195	si = rsi;
		1196
		1197	if (::conf.script_node_change)
		1198	{
		1199	run_script_cb *cb = new run_script_cb;
		1200	cb->set<connection, &connection::script_node_change> (this);
		1201	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1202	}
		1203
		1204	// }
		1205	//else
		1206	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1207	// conf->nodename, (const char )si, (const char )rsi);
1093	}	1208	}
		1209	}
		1210	else if (seqclass == 1) // far history
		1211	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1212	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1213	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1214	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1215	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1216	else if (seqclass == 3) // reset
		1217	{
		1218	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1219	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1220	send_reset (rsi);
1094	}	1221	}
1095		1222
1096	delete d;	1223	delete d;
1097	break;	1224	break;
1098	}	1225	}
…		…
1102	break;	1229	break;
1103		1230
1104	case vpn_packet::PT_CONNECT_REQ:	1231	case vpn_packet::PT_CONNECT_REQ:
1105	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1232	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1106	{	1233	{
1107	connect_req_packet p = (connect_req_packet ) pkt;	1234	connect_req_packet p = (connect_req_packet )pkt;
1108		1235
1109	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1236	if (p->id > 0 && p->id <= vpn->conns.size ())
1110	connection *c = vpn->conns[p->id - 1];
1111	conf->protocols = p->protocols;
1112
1113	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1114	conf->id, p->id, c->ictx && c->octx);
1115
1116	if (c->ictx && c->octx)
1117	{	1237	{
		1238	connection *c = vpn->conns[p->id - 1];
		1239	conf->protocols = p->protocols;
		1240
		1241	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1242	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1243	p->protocols,
		1244	c->ictx && c->octx);
		1245
		1246	if (c->ictx && c->octx)
		1247	{
1118	// send connect_info packets to both sides, in case one is	1248	// send connect_info packets to both sides, in case one is
1119	// behind a nat firewall (or both ;)	1249	// behind a nat firewall (or both ;)
1120	c->send_connect_info (conf->id, si, conf->protocols);	1250	c->send_connect_info (conf->id, si, conf->protocols);
1121	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1251	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1252	}
		1253	else
		1254	c->establish_connection ();
1122	}	1255	}
1123	else	1256	else
1124	c->establish_connection ();	1257	slog (L_WARN,
		1258	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1259	p->id);
1125	}	1260	}
1126		1261
1127	break;	1262	break;
1128		1263
1129	case vpn_packet::PT_CONNECT_INFO:	1264	case vpn_packet::PT_CONNECT_INFO:
1130	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1265	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1131	{	1266	{
1132	connect_info_packet p = (connect_info_packet )pkt;	1267	connect_info_packet p = (connect_info_packet )pkt;
1133		1268
1134	if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything	1269	if (p->id > 0 && p->id <= vpn->conns.size ())
1135	{	1270	{
1136	connection *c = vpn->conns[p->id - 1];	1271	connection *c = vpn->conns[p->id - 1];
1137		1272
1138	c->conf->protocols = p->protocols;	1273	c->conf->protocols = p->protocols;
1139	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1274	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1140	p->si.upgrade_protocol (protocol, c->conf);	1275	p->si.upgrade_protocol (protocol, c->conf);
1141		1276
1142	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1277	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1143	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1278	conf->nodename,
		1279	vpn->conns[p->id - 1]->conf->nodename,
		1280	(const char *)p->si,
		1281	p->protocols,
		1282	protocol,
		1283	p->si.supported_protocols (c->conf),
		1284	!c->ictx && !c->octx);
1144		1285
1145	const sockinfo &dsi = forward_si (p->si);	1286	const sockinfo &dsi = forward_si (p->si);
1146		1287
1147	if (dsi.valid ())	1288	if (dsi.valid ())
1148	c->send_auth_request (dsi, true);	1289	c->send_auth_request (dsi, true);
		1290	else
		1291	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1292	vpn->conns[p->id - 1]->conf->nodename,
		1293	(const char *)p->si);
1149	}	1294	}
		1295	else
		1296	slog (L_WARN,
		1297	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1298	p->id);
1150	}	1299	}
1151		1300
1152	break;	1301	break;
1153		1302
1154	default:	1303	default:
1155	send_reset (rsi);	1304	send_reset (rsi);
1156	break;	1305	break;
1157	}	1306	}
1158	}	1307	}
1159		1308
1160	void connection::keepalive_cb (time_watcher &w)	1309	inline void
		1310	connection::keepalive_cb (ev::timer &w, int revents)
1161	{	1311	{
1162	if (NOW >= last_activity + ::conf.keepalive + 30)	1312	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1313
		1314	if (when >= 0)
		1315	w.start (when);
		1316	else if (when < -15)
1163	{	1317	{
1164	reset_connection ();	1318	reset_connection ();
1165	establish_connection ();	1319	establish_connection ();
1166	}	1320	}
1167	else if (NOW < last_activity + ::conf.keepalive)
1168	w.start (last_activity + ::conf.keepalive);
1169	else if (conf->connectmode != conf_node::C_ONDEMAND	1321	else if (conf->connectmode != conf_node::C_ONDEMAND
1170	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1322	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1171	{	1323	{
		1324	w.start (3);
1172	send_ping (si);	1325	send_ping (si);
1173	w.start (NOW + 5);
1174	}	1326	}
1175	else if (NOW < last_activity + ::conf.keepalive + 10)	1327	else if (when >= -10)
1176	// hold ondemand connections implicitly a few seconds longer	1328	// hold ondemand connections implicitly a few seconds longer
1177	// should delete octx, though, or something like that ;)	1329	// should delete octx, though, or something like that ;)
1178	w.start (last_activity + ::conf.keepalive + 10);	1330	w.start (when + 10);
1179	else	1331	else
1180	reset_connection ();	1332	reset_connection ();
1181	}	1333	}
1182		1334
		1335	void
1183	void connection::send_connect_request (int id)	1336	connection::send_connect_request (int id)
1184	{	1337	{
1185	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1338	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1186		1339
1187	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1340	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1341	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1342	THISNODE->protocols);
1188	p->hmac_set (octx);	1343	p->hmac_set (octx);
1189	send_vpn_packet (p, si);	1344	send_vpn_packet (p, si);
1190		1345
1191	delete p;	1346	delete p;
1192	}	1347	}
1193		1348
1194	void connection::script_node ()	1349	void
		1350	connection::script_init_env (const char *ext)
1195	{	1351	{
1196	vpn->script_if_up ();
1197
1198	char *env;	1352	char *env;
		1353	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1354	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1355	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1356	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1357	conf->id & 0xff); putenv (env);
		1358	}
		1359
		1360	void
		1361	connection::script_init_connect_env ()
		1362	{
		1363	vpn->script_init_env ();
		1364
		1365	char *env;
1199	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1366	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1367	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1200	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1368	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1201	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1369	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1202	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1370	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1203	}	1371	}
1204		1372
		1373	inline const char *
1205	const char *connection::script_node_up ()	1374	connection::script_node_up ()
1206	{	1375	{
1207	script_node ();	1376	script_init_connect_env ();
1208		1377
1209	putenv ("STATE=up");	1378	putenv ((char *)"STATE=up");
1210		1379
		1380	char *filename;
		1381	asprintf (&filename,
		1382	"%s/%s",
		1383	confbase,
1211	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1384	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1212	}
1213		1385
		1386	return filename;
		1387	}
		1388
		1389	inline const char *
		1390	connection::script_node_change ()
		1391	{
		1392	script_init_connect_env ();
		1393
		1394	putenv ((char *)"STATE=change");
		1395
		1396	char *filename;
		1397	asprintf (&filename,
		1398	"%s/%s",
		1399	confbase,
		1400	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1401
		1402	return filename;
		1403	}
		1404
		1405	inline const char *
1214	const char *connection::script_node_down ()	1406	connection::script_node_down ()
1215	{	1407	{
1216	script_node ();	1408	script_init_connect_env ();
1217		1409
1218	putenv ("STATE=down");	1410	putenv ((char *)"STATE=down");
1219		1411
1220	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1412	char *filename;
		1413	asprintf (&filename,
		1414	"%s/%s",
		1415	confbase,
		1416	::conf.script_node_down ? ::conf.script_node_down : "node-down");
		1417
		1418	return filename;
1221	}	1419	}
1222		1420
1223	connection::connection (struct vpn vpn, conf_node conf)	1421	connection::connection (struct vpn vpn, conf_node conf)
1224	: vpn(vpn), conf(conf)	1422	: vpn(vpn), conf(conf),
1225	, rekey (this, &connection::rekey_cb)
1226	, keepalive (this, &connection::keepalive_cb)
1227	, establish_connection (this, &connection::establish_connection_cb)
1228	#if ENABLE_DNS	1423	#if ENABLE_DNS
1229	, dns (0)	1424	dns (0),
1230	#endif	1425	#endif
		1426	data_queue(conf->max_ttl, conf->max_queue + 1),
		1427	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1231	{	1428	{
		1429	rekey .set<connection, &connection::rekey_cb > (this);
		1430	keepalive .set<connection, &connection::keepalive_cb > (this);
		1431	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1432
		1433	last_establish_attempt = 0.;
1232	octx = ictx = 0;	1434	octx = ictx = 0;
1233	retry_cnt = 0;
1234		1435
1235	if (!conf->protocols) // make sure some protocol is enabled	1436	connectmode = conf->connectmode;
1236	conf->protocols = PROT_UDPv4;
1237		1437
1238	connectmode = conf_node::C_ALWAYS; // initial setting	1438	// queue a dummy packet to force an initial connection attempt
		1439	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1440	vpn_queue.put (new net_packet);
		1441
1239	reset_connection ();	1442	reset_connection ();
1240	}	1443	}
1241		1444
1242	connection::~connection ()	1445	connection::~connection ()
1243	{	1446	{
1244	shutdown ();	1447	shutdown ();
1245	}	1448	}
1246		1449
		1450	void
1247	void connection_init ()	1451	connection_init ()
1248	{	1452	{
1249	auth_rate_limiter.clear ();	1453	auth_rate_limiter.clear ();
1250	reset_rate_limiter.clear ();	1454	reset_rate_limiter.clear ();
1251	}	1455	}
1252		1456

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Comparing gvpe/src/connection.C (file contents): Revision 1.43 by pcg, Fri Mar 4 04:52:38 2005 UTC vs. Revision 1.99 by root, Wed Jul 17 04:36:03 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.43 by pcg, Fri Mar 4 04:52:38 2005 UTC vs.
Revision 1.99 by root, Wed Jul 17 04:36:03 2013 UTC