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

Comparing gvpe/src/connection.C (file contents):
Revision 1.35 by pcg, Mon May 10 21:24:48 2004 UTC vs.
Revision 1.104 by root, Fri Jul 19 18:18:27 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 "HUHN\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 (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		126	kdf.extract (s, sizeof (s));
		127	kdf.extract_done (HKDF_PRF_HASH ());
		128	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		129
		130	HMAC_CTX_init (&hctx);
		131	require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		132	}
		133
		134	{
		135	u8 cipher_key[CIPHER_KEYSIZE];
		136	static const unsigned char cipher_info[] = "gvpe cipher key";
		137
		138	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		139	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		140	kdf.extract (s, sizeof (s));
		141	kdf.extract_done (HKDF_PRF_HASH ());
		142	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		143
64	EVP_CIPHER_CTX_init (&cctx);	144	EVP_CIPHER_CTX_init (&cctx);
65	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	145	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
66	HMAC_CTX_init (&hctx);	146	}
67	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
68	}	147	}
69		148
70	crypto_ctx::~crypto_ctx ()	149	crypto_ctx::~crypto_ctx ()
71	{	150	{
72	require (EVP_CIPHER_CTX_cleanup (&cctx));	151	require (EVP_CIPHER_CTX_cleanup (&cctx));
73	HMAC_CTX_cleanup (&hctx);	152	HMAC_CTX_cleanup (&hctx);
74	}	153	}
75		154
		155	static inline void
		156	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		157	{
		158	if (RSA_public_encrypt (sizeof (auth.rsa),
		159	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		160	key, RSA_PKCS1_OAEP_PADDING) < 0)
		161	fatal ("RSA_public_encrypt error");
		162
		163	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		164	}
		165
		166	static inline bool
		167	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		168	{
		169	u8 rsa_decrypt[RSA_KEYLEN];
		170
		171	if (RSA_private_decrypt (sizeof (encr.rsa),
		172	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		173	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		174	return 0;
		175
		176	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		177	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		178
		179	return 1;
		180	}
		181
76	static void	182	static void
77	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	183	auth_hash (const auth_data &auth, const ecdh_key &b, auth_mac &mac)
78	{	184	{
79	EVP_MD_CTX ctx;	185	hkdf kdf (&auth.ecdh, sizeof (auth.ecdh), AUTH_DIGEST ()); // use remote ecdh b as salt
80		186	kdf.extract (&auth.rsa, sizeof (auth.rsa));
81	EVP_MD_CTX_init (&ctx);	187	kdf.extract_done ();
82	require (EVP_DigestInit (&ctx, RSA_HASH));	188	kdf.expand (mac, sizeof mac, b, sizeof b); // use response ecdh b as info
83	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));
84	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
85	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
86	EVP_MD_CTX_cleanup (&ctx);
87	}	189	}
88		190
89	struct rsa_entry {	191	void
90	tstamp expire;	192	connection::generate_auth_data ()
91	rsaid id;
92	rsachallenge chg;
93	};
94
95	struct rsa_cache : list<rsa_entry>
96	{	193	{
97	void cleaner_cb (time_watcher &w); time_watcher cleaner;	194	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	{ }	195	{
		196	// request data
		197	rand_fill (snd_auth.rsa);
		198	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
138		199
139	} rsa_cache;	200	// eventual response data
140		201	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
141	void rsa_cache::cleaner_cb (time_watcher &w)
142	{
143	if (!empty ())
144	{	202	}
145	w.start (NOW + RSA_TTL);
146		203
147	for (iterator i = begin (); i != end (); )	204	// every use prolongs the expiry
148	if (i->expire <= NOW)	205	auth_expire = ev_now () + AUTH_TTL;
149	i = erase (i);
150	else
151	++i;
152	}
153	}	206	}
154		207
155	//////////////////////////////////////////////////////////////////////////////	208	//////////////////////////////////////////////////////////////////////////////
156		209
157	void pkt_queue::put (net_packet *p)	210	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		211	: max_ttl (max_ttl), max_queue (max_queue)
158	{	212	{
159	if (queue[i])	213	queue = new pkt [max_queue];
160	{
161	delete queue[i];
162	j = (j + 1) % QUEUEDEPTH;
163	}
164		214
165	queue[i] = p;
166
167	i = (i + 1) % QUEUEDEPTH;
168	}
169
170	net_packet *pkt_queue::get ()
171	{
172	net_packet *p = queue[j];
173
174	if (p)
175	{
176	queue[j] = 0;
177	j = (j + 1) % QUEUEDEPTH;
178	}
179
180	return p;
181	}
182
183	pkt_queue::pkt_queue ()
184	{
185	memset (queue, 0, sizeof (queue));
186	i = 0;	215	i = 0;
187	j = 0;	216	j = 0;
		217
		218	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
188	}	219	}
189		220
190	pkt_queue::~pkt_queue ()	221	pkt_queue::~pkt_queue ()
191	{	222	{
192	for (i = QUEUEDEPTH; --i > 0; )	223	while (net_packet *p = get ())
		224	delete p;
		225
193	delete queue[i];	226	delete [] queue;
194	}	227	}
195		228
		229	void
		230	pkt_queue::expire_cb (ev::timer &w, int revents)
		231	{
		232	ev_tstamp expire = ev_now () - max_ttl;
		233
		234	for (;;)
		235	{
		236	if (empty ())
		237	break;
		238
		239	double diff = queue[j].tstamp - expire;
		240
		241	if (diff >= 0.)
		242	{
		243	w.start (diff > 0.5 ? diff : 0.5);
		244	break;
		245	}
		246
		247	delete get ();
		248	}
		249	}
		250
		251	void
		252	pkt_queue::put (net_packet *p)
		253	{
		254	ev_tstamp now = ev_now ();
		255
		256	// start expiry timer
		257	if (empty ())
		258	expire.start (max_ttl);
		259
		260	int ni = i + 1 == max_queue ? 0 : i + 1;
		261
		262	if (ni == j)
		263	delete get ();
		264
		265	queue[i].pkt = p;
		266	queue[i].tstamp = now;
		267
		268	i = ni;
		269	}
		270
		271	net_packet *
		272	pkt_queue::get ()
		273	{
		274	if (empty ())
		275	return 0;
		276
		277	net_packet *p = queue[j].pkt;
		278	queue[j].pkt = 0;
		279
		280	j = j + 1 == max_queue ? 0 : j + 1;
		281
		282	return p;
		283	}
		284
196	struct net_rateinfo {	285	struct net_rateinfo
		286	{
197	u32 host;	287	u32 host;
198	double pcnt, diff;	288	double pcnt, diff;
199	tstamp last;	289	tstamp last;
200	};	290	};
201		291
211		301
212	bool can (const sockinfo &si) { return can((u32)si.host); }	302	bool can (const sockinfo &si) { return can((u32)si.host); }
213	bool can (u32 host);	303	bool can (u32 host);
214	};	304	};
215		305
216	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	306	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
217		307
		308	bool
218	bool net_rate_limiter::can (u32 host)	309	net_rate_limiter::can (u32 host)
219	{	310	{
220	iterator i;	311	iterator i;
221		312
222	for (i = begin (); i != end (); )	313	for (i = begin (); i != end (); )
223	if (i->host == host)	314	if (i->host == host)
224	break;	315	break;
225	else if (i->last < NOW - NRL_EXPIRE)	316	else if (i->last < ev_now () - NRL_EXPIRE)
226	i = erase (i);	317	i = erase (i);
227	else	318	else
228	i++;	319	i++;
229		320
230	if (i == end ())	321	if (i == end ())
…		…
232	net_rateinfo ri;	323	net_rateinfo ri;
233		324
234	ri.host = host;	325	ri.host = host;
235	ri.pcnt = 1.;	326	ri.pcnt = 1.;
236	ri.diff = NRL_MAXDIF;	327	ri.diff = NRL_MAXDIF;
237	ri.last = NOW;	328	ri.last = ev_now ();
238		329
239	push_front (ri);	330	push_front (ri);
240		331
241	return true;	332	return true;
242	}	333	}
…		…
244	{	335	{
245	net_rateinfo ri (*i);	336	net_rateinfo ri (*i);
246	erase (i);	337	erase (i);
247		338
248	ri.pcnt = ri.pcnt * NRL_ALPHA;	339	ri.pcnt = ri.pcnt * NRL_ALPHA;
249	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	340	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
250		341
251	ri.last = NOW;	342	ri.last = ev_now ();
252		343
253	double dif = ri.diff / ri.pcnt;	344	double dif = ri.diff / ri.pcnt;
254		345
255	bool send = dif > NRL_CUTOFF;	346	bool send = dif > NRL_CUTOFF;
256		347
…		…
268	}	359	}
269	}	360	}
270		361
271	/////////////////////////////////////////////////////////////////////////////	362	/////////////////////////////////////////////////////////////////////////////
272		363
273	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	364	void
274
275	void hmac_packet::hmac_gen (crypto_ctx *ctx)	365	hmac_packet::hmac_gen (crypto_ctx ctx, u8 hmac_digest)
276	{	366	{
277	unsigned int xlen;
278
279	HMAC_CTX *hctx = &ctx->hctx;	367	HMAC_CTX *hctx = &ctx->hctx;
280		368
281	HMAC_Init_ex (hctx, 0, 0, 0, 0);	369	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
282	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	370	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), len - sizeof (hmac_packet)));
283	len - sizeof (hmac_packet));	371	require (HMAC_Final (hctx, hmac_digest, 0));
284	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);
285	}	372	}
286		373
287	void	374	void
288	hmac_packet::hmac_set (crypto_ctx *ctx)	375	hmac_packet::hmac_set (crypto_ctx *ctx)
289	{	376	{
290	hmac_gen (ctx);	377	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
291		378	hmac_gen (ctx, hmac_digest);
292	memcpy (hmac, hmac_digest, HMACLENGTH);	379	memcpy (hmac, hmac_digest, HMACLENGTH);
293	}	380	}
294		381
295	bool	382	bool
296	hmac_packet::hmac_chk (crypto_ctx *ctx)	383	hmac_packet::hmac_chk (crypto_ctx *ctx)
297	{	384	{
298	hmac_gen (ctx);	385	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
299		386	hmac_gen (ctx, hmac_digest);
300	return !memcmp (hmac, hmac_digest, HMACLENGTH);	387	return !memcmp (hmac, hmac_digest, HMACLENGTH);
301	}	388	}
302		389
		390	void
303	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	391	vpn_packet::set_hdr (ptype type_, unsigned int dst)
304	{	392	{
305	type = type_;	393	type = type_;
306		394
307	int src = THISNODE->id;	395	int src = THISNODE->id;
308		396
…		…
313		401
314	#define MAXVPNDATA (MAX_MTU - 6 - 6)	402	#define MAXVPNDATA (MAX_MTU - 6 - 6)
315	#define DATAHDR (sizeof (u32) + RAND_SIZE)	403	#define DATAHDR (sizeof (u32) + RAND_SIZE)
316		404
317	struct vpndata_packet : vpn_packet	405	struct vpndata_packet : vpn_packet
		406	{
		407	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		408
		409	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		410	tap_packet unpack (connection conn, u32 &seqno);
		411
		412	private:
		413	const u32 data_hdr_size () const
318	{	414	{
319	u8 data[MAXVPNDATA + DATAHDR]; // seqno
320
321	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
322	tap_packet unpack (connection conn, u32 &seqno);
323	private:
324
325	const u32 data_hdr_size () const
326	{
327	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	415	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
328	}
329	};	416	}
		417	};
330		418
331	void	419	void
332	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	420	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
333	{	421	{
334	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	422	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
336	ptype type = PT_DATA_UNCOMPRESSED;	424	ptype type = PT_DATA_UNCOMPRESSED;
337		425
338	#if ENABLE_COMPRESSION	426	#if ENABLE_COMPRESSION
339	u8 cdata[MAX_MTU];	427	u8 cdata[MAX_MTU];
340		428
341	if (conn->features & ENABLE_COMPRESSION)	429	if (conn->features & FEATURE_COMPRESSION)
342	{	430	{
343	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	431	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
344		432
345	if (cl)	433	if (cl)
346	{	434	{
…		…
352	d[1] = cl;	440	d[1] = cl;
353	}	441	}
354	}	442	}
355	#endif	443	#endif
356		444
357	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	445	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
358		446
359	struct {	447	struct {
360	#if RAND_SIZE	448	#if RAND_SIZE
361	u8 rnd[RAND_SIZE];	449	u8 rnd[RAND_SIZE];
362	#endif	450	#endif
363	u32 seqno;	451	u32 seqno;
364	} datahdr;	452	} datahdr;
365		453
366	datahdr.seqno = ntohl (seqno);	454	datahdr.seqno = ntohl (seqno);
367	#if RAND_SIZE	455	#if RAND_SIZE
368	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	456	// NB: a constant (per session) random prefix
		457	// is likely enough, but we don't take any chances.
		458	conn->oiv.get (datahdr.rnd, RAND_SIZE);
369	#endif	459	#endif
370		460
371	require (EVP_EncryptUpdate (cctx,	461	require (EVP_EncryptUpdate (cctx,
372	(unsigned char *) data + outl, &outl2,	462	(unsigned char *) data + outl, &outl2,
373	(unsigned char *) &datahdr, DATAHDR));	463	(unsigned char *) &datahdr, DATAHDR));
…		…
395	int outl = 0, outl2;	485	int outl = 0, outl2;
396	tap_packet *p = new tap_packet;	486	tap_packet *p = new tap_packet;
397	u8 *d;	487	u8 *d;
398	u32 l = len - data_hdr_size ();	488	u32 l = len - data_hdr_size ();
399		489
400	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	490	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
401		491
402	#if ENABLE_COMPRESSION	492	#if ENABLE_COMPRESSION
403	u8 cdata[MAX_MTU];	493	u8 cdata[MAX_MTU];
404		494
405	if (type == PT_DATA_COMPRESSED)	495	if (type == PT_DATA_COMPRESSED)
406	d = cdata;	496	d = cdata;
407	else	497	else
408	#endif	498	#endif
409	d = &(*p)[6 + 6 - DATAHDR];	499	d = &(*p)[6 + 6] - DATAHDR;
410		500
411	/* this overwrites part of the src mac, but we fix that later */	501	// we play do evil games with the struct layout atm.
		502	// pending better solutions, we at least do some verification.
		503	// this is fine, as we left ISO territory long ago.
		504	require (DATAHDR <= 16);
		505	require ((u8 )(&p->len + 1) == &(p)[0]);
		506
		507	// this can overwrite the len/dst/src fields
412	require (EVP_DecryptUpdate (cctx,	508	require (EVP_DecryptUpdate (cctx,
413	d, &outl2,	509	d, &outl2,
414	(unsigned char *)&data, len - data_hdr_size ()));	510	(unsigned char *)&data, len - data_hdr_size ()));
415	outl += outl2;	511	outl += outl2;
416		512
…		…
447	}	543	}
448	};	544	};
449		545
450	struct config_packet : vpn_packet	546	struct config_packet : vpn_packet
451	{	547	{
452	// actually, hmaclen cannot be checked because the hmac	548	u8 serial[SERIAL_SIZE];
453	// field comes before this data, so peers with other
454	// hmacs simply will not work.
455	u8 prot_major, prot_minor, randsize, hmaclen;	549	u8 prot_major, prot_minor, randsize;
456	u8 flags, challengelen, features, pad3;	550	u8 flags, features, pad6, pad7, pad8;
457	u32 cipher_nid, digest_nid, hmac_nid;	551	u32 cipher_nid, mac_nid, auth_nid;
458		552
459	void setup (ptype type, int dst);	553	void setup (ptype type, int dst);
460	bool chk_config () const;	554	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
461		555
462	static u8 get_features ()	556	static u8 get_features ()
463	{	557	{
464	u8 f = 0;	558	u8 f = 0;
465	#if ENABLE_COMPRESSION	559	#if ENABLE_COMPRESSION
466	f \|= FEATURE_COMPRESSION;	560	f \|= FEATURE_COMPRESSION;
467	#endif	561	#endif
468	#if ENABLE_ROHC	562	#if ENABLE_ROHC
469	f \|= FEATURE_ROHC;	563	f \|= FEATURE_ROHC;
470	#endif	564	#endif
		565	#if ENABLE_BRIDGING
		566	f \|= FEATURE_BRIDGING;
		567	#endif
471	return f;	568	return f;
472	}	569	}
473	};	570	};
474		571
		572	void
475	void config_packet::setup (ptype type, int dst)	573	config_packet::setup (ptype type, int dst)
476	{	574	{
477	prot_major = PROTOCOL_MAJOR;	575	prot_major = PROTOCOL_MAJOR;
478	prot_minor = PROTOCOL_MINOR;	576	prot_minor = PROTOCOL_MINOR;
479	randsize = RAND_SIZE;	577	randsize = RAND_SIZE;
480	hmaclen = HMACLENGTH;	578	flags = 0;
481	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
482	challengelen = sizeof (rsachallenge);
483	features = get_features ();	579	features = get_features ();
484		580
		581	strncpy ((char *)serial, conf.serial, sizeof (serial));
		582
485	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	583	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
486	digest_nid = htonl (EVP_MD_type (RSA_HASH));
487	hmac_nid = htonl (EVP_MD_type (DIGEST));	584	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		585	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
488		586
489	len = sizeof (*this) - sizeof (net_packet);	587	len = sizeof (*this) - sizeof (net_packet);
490	set_hdr (type, dst);	588	set_hdr (type, dst);
491	}	589	}
492		590
493	bool config_packet::chk_config () const	591	bool
		592	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
494	{	593	{
495	if (prot_major != PROTOCOL_MAJOR)	594	if (prot_major != PROTOCOL_MAJOR)
496	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	595	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		596	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
497	else if (randsize != RAND_SIZE)	597	else if (randsize != RAND_SIZE)
498	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	598	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
499	else if (hmaclen != HMACLENGTH)	599	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
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)))	600	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));	601	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
509	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	602	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
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)))	603	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));	604	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		605	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		606	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		607	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		608	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
513	else	609	else
		610	{
		611	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		612
		613	if (cmp > 0)
		614	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		615	conf->nodename, (const char *)rsi);
		616	else if (cmp == 0)
514	return true;	617	return true;
		618	}
515		619
516	return false;	620	return false;
517	}	621	}
518		622
519	struct auth_req_packet : config_packet	623	struct auth_req_packet : config_packet // UNPROTECTED
520	{	624	{
521	char magic[8];	625	char magic[8];
522	u8 initiate; // false if this is just an automatic reply	626	u8 initiate; // false if this is just an automatic reply
523	u8 protocols; // supported protocols (will be patched on forward)	627	u8 protocols; // supported protocols (will be patched on forward)
524	u8 pad2, pad3;	628	u8 pad2, pad3;
525	rsaid id;	629	auth_encr encr;
526	rsaencrdata encr;
527		630
528	auth_req_packet (int dst, bool initiate_, u8 protocols_)	631	auth_req_packet (int dst, bool initiate_, u8 protocols_)
529	{	632	{
530	config_packet::setup (PT_AUTH_REQ, dst);	633	config_packet::setup (PT_AUTH_REQ, dst);
531	strncpy (magic, MAGIC, 8);	634	memcpy (magic, MAGIC, 8);
532	initiate = !!initiate_;	635	initiate = !!initiate_;
533	protocols = protocols_;	636	protocols = protocols_;
534		637
535	len = sizeof (*this) - sizeof (net_packet);	638	len = sizeof (*this) - sizeof (net_packet);
536	}	639	}
537	};	640	};
538		641
539	struct auth_res_packet : config_packet	642	struct auth_res_packet : vpn_packet // UNPROTECTED
540	{	643	{
541	rsaid id;
542	u8 pad1, pad2, pad3;
543	u8 response_len; // encrypted length
544	rsaresponse response;	644	auth_response response;
545		645
546	auth_res_packet (int dst)	646	auth_res_packet (int dst)
547	{	647	{
548	config_packet::setup (PT_AUTH_RES, dst);	648	set_hdr (PT_AUTH_RES, dst);
549		649
550	len = sizeof (*this) - sizeof (net_packet);	650	len = sizeof (*this) - sizeof (net_packet);
551	}	651	}
552	};	652	};
553		653
…		…
583	};	683	};
584		684
585	/////////////////////////////////////////////////////////////////////////////	685	/////////////////////////////////////////////////////////////////////////////
586		686
587	void	687	void
588	connection::connection_established ()	688	connection::connection_established (const sockinfo &rsi)
589	{	689	{
		690	if (!have_snd_auth \|\| !have_rcv_auth)
		691	return;
		692
		693	si = rsi;
		694	protocol = rsi.prot;
		695
		696	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		697	conf->nodename, (const char *)rsi,
		698	is_direct ? "direct" : "forwarded",
		699	PROTOCOL_MAJOR, prot_minor);
		700
		701	if (::conf.script_node_up)
		702	{
		703	run_script_cb *cb = new run_script_cb;
		704	cb->set<connection, &connection::script_node_up> (this);
		705	run_script_queued (cb, _("node-up command execution failed, continuing."));
		706	}
		707
		708	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		709	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		710
		711	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		712	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		713
		714	oiv.reset ();
		715
		716	// make sure rekeying timeouts are slightly asymmetric
		717	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		718	rekey.start (rekey_interval, rekey_interval);
		719
		720	keepalive.start (::conf.keepalive);
		721
		722	// send queued packets
590	if (ictx && octx)	723	if (ictx && octx)
591	{	724	{
592	connectmode = conf->connectmode;	725	while (tap_packet p = (tap_packet )data_queue.get ())
593
594	rekey.start (NOW + ::conf.rekey);
595	keepalive.start (NOW + ::conf.keepalive);
596
597	// send queued packets
598	if (ictx && octx)
599	{	726	{
600	while (tap_packet p = (tap_packet )data_queue.get ())
601	{
602	send_data_packet (p);	727	if (p->len) send_data_packet (p);
603	delete p;	728	delete p;
604	}
605
606	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
607	{
608	send_vpn_packet (p, si, IPTOS_RELIABILITY);
609	delete p;
610	}
611	}	729	}
		730
		731	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		732	{
		733	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
		734	delete p;
		735	}
612	}	736	}
		737
		738	vpn->connection_established (this);
		739	}
		740
		741	void
		742	connection::reset_si ()
		743	{
		744	if (vpn->can_direct (THISNODE, conf))
		745	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
613	else	746	else
614	{	747	{
615	retry_cnt = 0;	748	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
616	establish_connection.start (NOW + 5);	749	protocol = 0;
617	keepalive.stop ();
618	rekey.stop ();
619	}	750	}
620	}
621
622	void
623	connection::reset_si ()
624	{
625	protocol = best_protocol (THISNODE->protocols & conf->protocols);
626
627	// mask out protocols we cannot establish
628	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
629	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
630		751
631	si.set (conf, protocol);	752	si.set (conf, protocol);
		753
		754	is_direct = si.valid ();
632	}	755	}
633		756
634	// ensure sockinfo is valid, forward if necessary	757	// ensure sockinfo is valid, forward if necessary
635	const sockinfo &	758	const sockinfo &
636	connection::forward_si (const sockinfo &si) const	759	connection::forward_si (const sockinfo &si) const
637	{	760	{
638	if (!si.valid ())	761	if (!si.valid ())
639	{	762	{
640	connection *r = vpn->find_router ();	763	connection *r = vpn->find_router_for (this);
641		764
642	if (r)	765	if (r)
643	{	766	{
644	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	767	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
645	conf->nodename, r->conf->nodename);	768	conf->nodename, r->conf->nodename);
646	return r->si;	769	return r->si;
647	}	770	}
648	else	771	else
649	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	772	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
650	conf->nodename);	773	conf->nodename);
651	}	774	}
652		775
653	return si;	776	return si;
654	}	777	}
…		…
664	connection::send_ping (const sockinfo &si, u8 pong)	787	connection::send_ping (const sockinfo &si, u8 pong)
665	{	788	{
666	ping_packet *pkt = new ping_packet;	789	ping_packet *pkt = new ping_packet;
667		790
668	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	791	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		792
		793	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
669	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	794	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
670		795
671	delete pkt;	796	delete pkt;
672	}	797	}
673		798
…		…
688	void	813	void
689	connection::send_auth_request (const sockinfo &si, bool initiate)	814	connection::send_auth_request (const sockinfo &si, bool initiate)
690	{	815	{
691	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	816	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
692		817
693	rsachallenge chg;	818	generate_auth_data ();
694	rsa_cache.gen (pkt->id, chg);
695	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	819	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
696		820
697	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	821	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
698
699	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	822	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
700		823
701	delete pkt;	824	delete pkt;
702	}	825	}
703		826
704	void	827	void
705	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	828	connection::send_auth_response (const sockinfo &si)
706	{	829	{
707	auth_res_packet *pkt = new auth_res_packet (conf->id);	830	auth_res_packet *pkt = new auth_res_packet (conf->id);
708		831
709	pkt->id = id;	832	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof rcv_ecdh_b);
		833	auth_hash (rcv_auth, rcv_ecdh_b, pkt->response.mac);
710		834
711	rsa_hash (id, chg, pkt->response);
712
713	pkt->hmac_set (octx);
714
715	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	835	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
716
717	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	836	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
718		837
719	delete pkt;	838	delete pkt;
720	}	839	}
721		840
722	void	841	void
723	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	842	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
724	{	843	{
725	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	844	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
726	conf->id, rid, (const char *)rsi);	845	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		846	conf->protocols);
727		847
728	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	848	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
729		849
730	r->hmac_set (octx);	850	r->hmac_set (octx);
731	send_vpn_packet (r, si);	851	send_vpn_packet (r, si);
732		852
733	delete r;	853	delete r;
734	}	854	}
735		855
736	void	856	inline void
737	connection::establish_connection_cb (time_watcher &w)	857	connection::establish_connection_cb (ev::timer &w, int revents)
738	{	858	{
739	if (!ictx	859	if (!(ictx && octx)
740	&& conf != THISNODE	860	&& conf != THISNODE
741	&& connectmode != conf_node::C_NEVER	861	&& connectmode != conf_node::C_NEVER
742	&& connectmode != conf_node::C_DISABLED	862	&& connectmode != conf_node::C_DISABLED
743	&& NOW > w.at)	863	&& !w.is_active ())
744	{	864	{
745	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	865	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
746		866	// and stop trying. should probably be handled by a per-connection expire handler.
747	if (retry_int < 3600 * 8)	867	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		868	{
		869	reset_connection ();
748	retry_cnt++;	870	return;
		871	}
749		872
750	w.start (NOW + retry_int);	873	last_establish_attempt = ev_now ();
		874
		875	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		876	? (retry_cnt & 3) + 1
		877	: 1 << (retry_cnt >> 2));
751		878
752	reset_si ();	879	reset_si ();
753		880
754	if (si.prot && !si.host)	881	bool slow = si.prot & PROT_SLOW;
		882
		883	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		884	{
		885	/TODO/ /* start the timer so we don't recurse endlessly */
		886	w.start (1);
755	vpn->send_connect_request (conf->id);	887	vpn->send_connect_request (this);
		888	}
756	else	889	else
757	{	890	{
		891	if (si.valid ())
		892	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		893	conf->nodename, (const char *)si);
		894
758	const sockinfo &dsi = forward_si (si);	895	const sockinfo &dsi = forward_si (si);
		896
		897	slow = slow \|\| (dsi.prot & PROT_SLOW);
759		898
760	if (dsi.valid () && auth_rate_limiter.can (dsi))	899	if (dsi.valid () && auth_rate_limiter.can (dsi))
761	{	900	{
762	if (retry_cnt < 4)	901	if (retry_cnt < 4)
763	send_auth_request (dsi, true);	902	send_auth_request (dsi, true);
764	else	903	else
765	send_ping (dsi, 0);	904	send_ping (dsi, 0);
766	}	905	}
767	}	906	}
		907
		908	retry_int *= slow ? 8. : 0.9;
		909
		910	if (retry_int < conf->max_retry)
		911	retry_cnt++;
		912	else
		913	retry_int = conf->max_retry;
		914
		915	w.start (retry_int);
768	}	916	}
769	}	917	}
770		918
771	void	919	void
772	connection::reset_connection ()	920	connection::reset_connection ()
…		…
775	{	923	{
776	slog (L_INFO, _("%s(%s): connection lost"),	924	slog (L_INFO, _("%s(%s): connection lost"),
777	conf->nodename, (const char *)si);	925	conf->nodename, (const char *)si);
778		926
779	if (::conf.script_node_down)	927	if (::conf.script_node_down)
780	run_script (run_script_cb (this, &connection::script_node_down), false);	928	{
		929	run_script_cb *cb = new run_script_cb;
		930	cb->set<connection, &connection::script_node_down> (this);
		931	run_script_queued (cb, _("node-down command execution failed, continuing."));
		932	}
781	}	933	}
782		934
783	delete ictx; ictx = 0;	935	delete ictx; ictx = 0;
784	delete octx; octx = 0;	936	delete octx; octx = 0;
785		937
786	si.host= 0;	938	si.host = 0;
787		939
		940	have_snd_auth = false;
		941	have_rcv_auth = false;
		942	auth_expire = 0.;
		943
788	last_activity = 0;	944	last_activity = 0.;
		945	//last_si_change = 0.;
789	retry_cnt = 0;	946	retry_cnt = 0;
790		947
791	rekey.stop ();	948	rekey.stop ();
792	keepalive.stop ();	949	keepalive.stop ();
793	establish_connection.stop ();	950	establish_connection.stop ();
…		…
800	send_reset (si);	957	send_reset (si);
801		958
802	reset_connection ();	959	reset_connection ();
803	}	960	}
804		961
805	void	962	// poor-man's rekeying
806	connection::rekey_cb (time_watcher &w)	963	inline void
		964	connection::rekey_cb (ev::timer &w, int revents)
807	{	965	{
808	reset_connection ();	966	reset_connection ();
809	establish_connection ();	967	establish_connection ();
810	}	968	}
811		969
…		…
827	if (oseqno > MAX_SEQNO)	985	if (oseqno > MAX_SEQNO)
828	rekey ();	986	rekey ();
829	}	987	}
830		988
831	void	989	void
		990	connection::post_inject_queue ()
		991	{
		992	// force a connection every now and when when packets are sent (max 1/s)
		993	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		994	establish_connection.stop ();
		995
		996	establish_connection ();
		997	}
		998
		999	void
832	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1000	connection::inject_data_packet (tap_packet *pkt)
833	{	1001	{
834	if (ictx && octx)	1002	if (ictx && octx)
835	send_data_packet (pkt);	1003	send_data_packet (pkt);
836	else	1004	else
837	{	1005	{
838	if (!broadcast)//DDDD
839	data_queue.put (new tap_packet (*pkt));	1006	data_queue.put (new tap_packet (*pkt));
840		1007	post_inject_queue ();
841	establish_connection ();
842	}	1008	}
843	}	1009	}
844		1010
		1011	void
845	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1012	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
846	{	1013	{
847	if (ictx && octx)	1014	if (ictx && octx)
848	send_vpn_packet (pkt, si, tos);	1015	send_vpn_packet (pkt, si, tos);
849	else	1016	else
850	{	1017	{
851	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1018	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
852		1019	post_inject_queue ();
853	establish_connection ();
854	}	1020	}
855	}	1021	}
856		1022
857	void	1023	void
858	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1024	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
859	{	1025	{
860	last_activity = NOW;	1026	last_activity = ev_now ();
861		1027
862	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1028	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
863	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1029	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1030
		1031	if (connectmode == conf_node::C_DISABLED)
		1032	return;
864		1033
865	switch (pkt->typ ())	1034	switch (pkt->typ ())
866	{	1035	{
867	case vpn_packet::PT_PING:	1036	case vpn_packet::PT_PING:
		1037	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1038
868	// we send pings instead of auth packets after some retries,	1039	// we send pings instead of auth packets after some retries,
869	// so reset the retry counter and establish a connection	1040	// so reset the retry counter and establish a connection
870	// when we receive a ping.	1041	// when we receive a ping.
871	if (!ictx)	1042	if (!ictx)
872	{	1043	{
873	if (auth_rate_limiter.can (rsi))	1044	if (auth_rate_limiter.can (rsi))
874	send_auth_request (rsi, true);	1045	send_auth_request (rsi, true);
875	}	1046	}
876	else	1047	else
		1048	// we would love to change the socket address here, but ping's aren't
		1049	// authenticated, so we best ignore it.
877	send_ping (rsi, 1); // pong	1050	send_ping (rsi, 1); // pong
878		1051
879	break;	1052	break;
880		1053
881	case vpn_packet::PT_PONG:	1054	case vpn_packet::PT_PONG:
		1055	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1056
		1057	// a PONG might mean that the other side doesn't really know
		1058	// about our desire for communication.
		1059	establish_connection ();
882	break;	1060	break;
883		1061
884	case vpn_packet::PT_RESET:	1062	case vpn_packet::PT_RESET:
885	{	1063	{
886	reset_connection ();	1064	reset_connection ();
887		1065
888	config_packet p = (config_packet ) pkt;	1066	config_packet p = (config_packet ) pkt;
889		1067
890	if (!p->chk_config ())	1068	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
891	{
892	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
893	conf->nodename, (const char *)rsi);
894	connectmode = conf_node::C_DISABLED;
895	}
896	else if (connectmode == conf_node::C_ALWAYS)
897	establish_connection ();	1069	establish_connection ();
898	}	1070	}
899	break;	1071	break;
900		1072
901	case vpn_packet::PT_AUTH_REQ:	1073	case vpn_packet::PT_AUTH_REQ:
902	if (auth_rate_limiter.can (rsi))	1074	if (auth_rate_limiter.can (rsi))
903	{	1075	{
904	auth_req_packet p = (auth_req_packet ) pkt;	1076	auth_req_packet p = (auth_req_packet )pkt;
905		1077
906	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1078	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1079	conf->nodename, p->initiate ? "initiate" : "reply",
		1080	p->protocols, p->features);
907		1081
908	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1082	if (memcmp (p->magic, MAGIC, 8))
		1083	{
		1084	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1085	conf->nodename, (const char *)rsi);
		1086	}
		1087	else if (p->chk_config (conf, rsi))
909	{	1088	{
910	if (p->prot_minor != PROTOCOL_MINOR)	1089	if (p->prot_minor != PROTOCOL_MINOR)
911	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1090	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
912	conf->nodename, (const char *)rsi,	1091	conf->nodename, (const char *)rsi,
913	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1092	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
914		1093
915	if (p->initiate)	1094	if (p->initiate)
916	send_auth_request (rsi, false);	1095	send_auth_request (rsi, false);
917		1096
918	rsachallenge k;	1097	auth_data auth;
919		1098
920	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1099	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
921	{	1100	{
922	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1101	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
923	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1102	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
924	break;
925	}	1103	}
926	else	1104	else
927	{	1105	{
928	delete octx;	1106	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
929		1107
930	octx = new crypto_ctx (k, 1);	1108	rcv_auth = auth;
931	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1109	have_rcv_auth = true;
932		1110
933	// compatibility code, remove when no longer required	1111	send_auth_response (rsi);
934	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
935		1112
		1113	if (chg)
		1114	{
936	conf->protocols = p->protocols;	1115	conf->protocols = p->protocols;
937	features = p->features & config_packet::get_features ();	1116	features = p->features & config_packet::get_features ();
938		1117
939	send_auth_response (rsi, p->id, k);
940
941	connection_established ();	1118	connection_established (rsi);
942
943	break;	1119	}
944	}	1120	}
		1121
		1122	break;
945	}	1123	}
946	else
947	slog (L_WARN, _("%s(%s): protocol mismatch"),
948	conf->nodename, (const char *)rsi);
949		1124
950	send_reset (rsi);	1125	send_reset (rsi);
951	}	1126	}
952		1127
953	break;	1128	break;
954		1129
955	case vpn_packet::PT_AUTH_RES:	1130	case vpn_packet::PT_AUTH_RES:
956	{	1131	{
957	auth_res_packet p = (auth_res_packet ) pkt;	1132	auth_res_packet p = (auth_res_packet )pkt;
958		1133
959	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1134	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
960		1135
961	if (p->chk_config ())	1136	auth_mac local_mac;
		1137	auth_hash (snd_auth, p->response.ecdh, local_mac);
		1138
		1139	if (memcmp (&p->response.mac, local_mac, sizeof local_mac))
962	{	1140	{
963	if (p->prot_minor != PROTOCOL_MINOR)
964	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
965	conf->nodename, (const char *)rsi,
966	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
967
968	rsachallenge chg;
969
970	if (!rsa_cache.find (p->id, chg))
971	{
972	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1141	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
973	conf->nodename, (const char *)rsi);	1142	conf->nodename, (const char *)rsi);
974	break;
975	}
976	else
977	{
978	crypto_ctx *cctx = new crypto_ctx (chg, 0);
979
980	if (!p->hmac_chk (cctx))
981	{
982	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
983	"could be an attack, or just corruption or a synchronization error"),
984	conf->nodename, (const char *)rsi);
985	break;
986	}
987	else
988	{
989	rsaresponse h;
990
991	rsa_hash (p->id, chg, h);
992
993	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
994	{
995	prot_minor = p->prot_minor;
996
997	delete ictx; ictx = cctx;
998
999	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1000
1001	si = rsi;
1002	protocol = rsi.prot;
1003
1004	connection_established ();
1005
1006	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1007	conf->nodename, (const char *)rsi,
1008	p->prot_major, p->prot_minor);
1009
1010	if (::conf.script_node_up)
1011	run_script (run_script_cb (this, &connection::script_node_up), false);
1012
1013	break;
1014	}
1015	else
1016	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1017	conf->nodename, (const char *)rsi);
1018	}
1019
1020	delete cctx;
1021	}
1022	}	1143	}
		1144	else if (!have_snd_auth)
		1145	{
		1146	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
		1147
		1148	have_snd_auth = true;
		1149	connection_established (rsi);
		1150	}
		1151
		1152	break;
1023	}	1153	}
1024		1154
1025	send_reset (rsi);	1155	send_reset (rsi);
1026	break;	1156	break;
1027		1157
…		…
1037	{	1167	{
1038	vpndata_packet p = (vpndata_packet )pkt;	1168	vpndata_packet p = (vpndata_packet )pkt;
1039		1169
1040	if (!p->hmac_chk (ictx))	1170	if (!p->hmac_chk (ictx))
1041	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1171	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1042	"could be an attack, or just corruption or a synchronization error"),	1172	"could be an attack, or just corruption or a synchronization error."),
1043	conf->nodename, (const char *)rsi);	1173	conf->nodename, (const char *)rsi);
1044	else	1174	else
1045	{	1175	{
1046	u32 seqno;	1176	u32 seqno;
1047	tap_packet *d = p->unpack (this, seqno);	1177	tap_packet *d = p->unpack (this, seqno);
		1178	int seqclass = iseqno.seqno_classify (seqno);
1048		1179
1049	if (iseqno.recv_ok (seqno))	1180	if (seqclass == 0) // ok
1050	{	1181	{
1051	vpn->tap->send (d);	1182	vpn->tap->send (d);
1052		1183
1053	if (si != rsi)	1184	if (si != rsi)
1054	{	1185	{
1055	// fast re-sync on connection changes, useful especially for tcp/ip	1186	// fast re-sync on source address changes, useful especially for tcp/ip
		1187	//if (last_si_change < ev_now () + 5.)
1056	si = rsi;	1188	// {
1057
1058	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1189	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1059	conf->nodename, (const char )si, (const char )rsi);	1190	conf->nodename, (const char )si, (const char )rsi);
		1191
		1192	si = rsi;
		1193
		1194	if (::conf.script_node_change)
		1195	{
		1196	run_script_cb *cb = new run_script_cb;
		1197	cb->set<connection, &connection::script_node_change> (this);
		1198	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1199	}
		1200
		1201	// }
		1202	//else
		1203	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1204	// conf->nodename, (const char )si, (const char )rsi);
1060	}	1205	}
		1206	}
		1207	else if (seqclass == 1) // far history
		1208	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1209	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1210	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1211	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1212	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1213	else if (seqclass == 3) // reset
		1214	{
		1215	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1216	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1217	send_reset (rsi);
1061	}	1218	}
1062		1219
1063	delete d;	1220	delete d;
1064	break;	1221	break;
1065	}	1222	}
…		…
1069	break;	1226	break;
1070		1227
1071	case vpn_packet::PT_CONNECT_REQ:	1228	case vpn_packet::PT_CONNECT_REQ:
1072	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1229	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1073	{	1230	{
1074	connect_req_packet p = (connect_req_packet ) pkt;	1231	connect_req_packet p = (connect_req_packet )pkt;
1075		1232
1076	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1233	if (p->id > 0 && p->id <= vpn->conns.size ())
1077	connection *c = vpn->conns[p->id - 1];
1078	conf->protocols = p->protocols;
1079
1080	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1081	conf->id, p->id, c->ictx && c->octx);
1082
1083	if (c->ictx && c->octx)
1084	{	1234	{
		1235	connection *c = vpn->conns[p->id - 1];
		1236	conf->protocols = p->protocols;
		1237
		1238	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1239	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1240	p->protocols,
		1241	c->ictx && c->octx);
		1242
		1243	if (c->ictx && c->octx)
		1244	{
1085	// send connect_info packets to both sides, in case one is	1245	// send connect_info packets to both sides, in case one is
1086	// behind a nat firewall (or both ;)	1246	// behind a nat firewall (or both ;)
1087	c->send_connect_info (conf->id, si, conf->protocols);	1247	c->send_connect_info (conf->id, si, conf->protocols);
1088	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1248	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1249	}
		1250	else
		1251	c->establish_connection ();
1089	}	1252	}
1090	else	1253	else
1091	c->establish_connection ();	1254	slog (L_WARN,
		1255	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1256	p->id);
1092	}	1257	}
1093		1258
1094	break;	1259	break;
1095		1260
1096	case vpn_packet::PT_CONNECT_INFO:	1261	case vpn_packet::PT_CONNECT_INFO:
1097	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1262	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1098	{	1263	{
1099	connect_info_packet p = (connect_info_packet ) pkt;	1264	connect_info_packet p = (connect_info_packet )pkt;
1100		1265
1101	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1266	if (p->id > 0 && p->id <= vpn->conns.size ())
1102		1267	{
1103	connection *c = vpn->conns[p->id - 1];	1268	connection *c = vpn->conns[p->id - 1];
1104		1269
1105	c->conf->protocols = p->protocols;	1270	c->conf->protocols = p->protocols;
1106	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1271	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1107	p->si.upgrade_protocol (protocol, c->conf);	1272	p->si.upgrade_protocol (protocol, c->conf);
1108		1273
1109	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1274	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1110	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1275	conf->nodename,
		1276	vpn->conns[p->id - 1]->conf->nodename,
		1277	(const char *)p->si,
		1278	p->protocols,
		1279	protocol,
		1280	p->si.supported_protocols (c->conf),
		1281	!c->ictx && !c->octx);
1111		1282
1112	const sockinfo &dsi = forward_si (p->si);	1283	const sockinfo &dsi = forward_si (p->si);
1113		1284
1114	if (dsi.valid ())	1285	if (dsi.valid ())
1115	c->send_auth_request (dsi, true);	1286	c->send_auth_request (dsi, true);
		1287	else
		1288	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1289	vpn->conns[p->id - 1]->conf->nodename,
		1290	(const char *)p->si);
		1291	}
		1292	else
		1293	slog (L_WARN,
		1294	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1295	p->id);
1116	}	1296	}
1117		1297
1118	break;	1298	break;
1119		1299
1120	default:	1300	default:
1121	send_reset (rsi);	1301	send_reset (rsi);
1122	break;	1302	break;
1123	}	1303	}
1124	}	1304	}
1125		1305
1126	void connection::keepalive_cb (time_watcher &w)	1306	inline void
		1307	connection::keepalive_cb (ev::timer &w, int revents)
1127	{	1308	{
1128	if (NOW >= last_activity + ::conf.keepalive + 30)	1309	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1310
		1311	if (when >= 0)
		1312	w.start (when);
		1313	else if (when < -15)
1129	{	1314	{
1130	reset_connection ();	1315	reset_connection ();
1131	establish_connection ();	1316	establish_connection ();
1132	}	1317	}
1133	else if (NOW < last_activity + ::conf.keepalive)
1134	w.start (last_activity + ::conf.keepalive);
1135	else if (conf->connectmode != conf_node::C_ONDEMAND	1318	else if (conf->connectmode != conf_node::C_ONDEMAND
1136	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1319	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1137	{	1320	{
		1321	w.start (3);
1138	send_ping (si);	1322	send_ping (si);
1139	w.start (NOW + 5);
1140	}	1323	}
1141	else if (NOW < last_activity + ::conf.keepalive + 10)	1324	else if (when >= -10)
1142	// hold ondemand connections implicitly a few seconds longer	1325	// hold ondemand connections implicitly a few seconds longer
1143	// should delete octx, though, or something like that ;)	1326	// should delete octx, though, or something like that ;)
1144	w.start (last_activity + ::conf.keepalive + 10);	1327	w.start (when + 10);
1145	else	1328	else
1146	reset_connection ();	1329	reset_connection ();
1147	}	1330	}
1148		1331
		1332	void
1149	void connection::send_connect_request (int id)	1333	connection::send_connect_request (int id)
1150	{	1334	{
1151	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1335	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1152		1336
1153	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1337	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1338	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1339	THISNODE->protocols);
1154	p->hmac_set (octx);	1340	p->hmac_set (octx);
1155	send_vpn_packet (p, si);	1341	send_vpn_packet (p, si);
1156		1342
1157	delete p;	1343	delete p;
1158	}	1344	}
1159		1345
1160	void connection::script_node ()	1346	void
		1347	connection::script_init_env (const char *ext)
1161	{	1348	{
1162	vpn->script_if_up ();
1163
1164	char *env;	1349	char *env;
		1350	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1351	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1352	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1353	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1354	conf->id & 0xff); putenv (env);
		1355	}
		1356
		1357	void
		1358	connection::script_init_connect_env ()
		1359	{
		1360	vpn->script_init_env ();
		1361
		1362	char *env;
1165	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1363	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1364	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1166	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1365	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1167	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1366	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1168	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1367	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1169	}	1368	}
1170		1369
		1370	inline const char *
1171	const char *connection::script_node_up ()	1371	connection::script_node_up ()
1172	{	1372	{
1173	script_node ();	1373	script_init_connect_env ();
1174		1374
1175	putenv ("STATE=up");	1375	putenv ((char *)"STATE=up");
1176		1376
		1377	char *filename;
		1378	asprintf (&filename,
		1379	"%s/%s",
		1380	confbase,
1177	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1381	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1178	}
1179		1382
		1383	return filename;
		1384	}
		1385
		1386	inline const char *
		1387	connection::script_node_change ()
		1388	{
		1389	script_init_connect_env ();
		1390
		1391	putenv ((char *)"STATE=change");
		1392
		1393	char *filename;
		1394	asprintf (&filename,
		1395	"%s/%s",
		1396	confbase,
		1397	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1398
		1399	return filename;
		1400	}
		1401
		1402	inline const char *
1180	const char *connection::script_node_down ()	1403	connection::script_node_down ()
1181	{	1404	{
1182	script_node ();	1405	script_init_connect_env ();
1183		1406
1184	putenv ("STATE=down");	1407	putenv ((char *)"STATE=down");
1185		1408
1186	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1409	char *filename;
1187	}	1410	asprintf (&filename,
		1411	"%s/%s",
		1412	confbase,
		1413	::conf.script_node_down ? ::conf.script_node_down : "node-down");
1188		1414
		1415	return filename;
		1416	}
		1417
1189	connection::connection(struct vpn *vpn_)	1418	connection::connection (struct vpn vpn, conf_node conf)
1190	: vpn(vpn_)	1419	: vpn(vpn), conf(conf),
1191	, rekey (this, &connection::rekey_cb)	1420	#if ENABLE_DNS
1192	, keepalive (this, &connection::keepalive_cb)	1421	dns (0),
		1422	#endif
		1423	data_queue(conf->max_ttl, conf->max_queue + 1),
		1424	vpn_queue(conf->max_ttl, conf->max_queue + 1)
		1425	{
		1426	rekey .set<connection, &connection::rekey_cb > (this);
		1427	keepalive .set<connection, &connection::keepalive_cb > (this);
1193	, establish_connection (this, &connection::establish_connection_cb)	1428	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1194	{	1429
		1430	last_establish_attempt = 0.;
1195	octx = ictx = 0;	1431	octx = ictx = 0;
1196	retry_cnt = 0;
1197		1432
1198	connectmode = conf_node::C_ALWAYS; // initial setting	1433	connectmode = conf->connectmode;
		1434
		1435	// queue a dummy packet to force an initial connection attempt
		1436	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1437	vpn_queue.put (new net_packet);
		1438
1199	reset_connection ();	1439	reset_connection ();
1200	}	1440	}
1201		1441
1202	connection::~connection ()	1442	connection::~connection ()
1203	{	1443	{
1204	shutdown ();	1444	shutdown ();
1205	}	1445	}
1206		1446
		1447	void
1207	void connection_init ()	1448	connection_init ()
1208	{	1449	{
1209	auth_rate_limiter.clear ();	1450	auth_rate_limiter.clear ();
1210	reset_rate_limiter.clear ();	1451	reset_rate_limiter.clear ();
1211	}	1452	}
1212		1453

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Comparing gvpe/src/connection.C (file contents): Revision 1.35 by pcg, Mon May 10 21:24:48 2004 UTC vs. Revision 1.104 by root, Fri Jul 19 18:18:27 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.35 by pcg, Mon May 10 21:24:48 2004 UTC vs.
Revision 1.104 by root, Fri Jul 19 18:18:27 2013 UTC