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

Comparing gvpe/src/connection.C (file contents):
Revision 1.61 by pcg, Sat Nov 10 19:43:37 2007 UTC vs.
Revision 1.107 by root, Fri Sep 20 11:57:03 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. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
25		37
		38	#include <openssl/opensslv.h>
26	#include <openssl/rand.h>	39	#include <openssl/rand.h>
27	#include <openssl/evp.h>	40	#include <openssl/evp.h>
28	#include <openssl/rsa.h>	41	#include <openssl/rsa.h>
29	#include <openssl/err.h>	42	#include <openssl/err.h>
		43
		44	// openssl 0.9.8 compatibility
		45	#if OPENSSL_VERSION_NUMBER < 0x10100000
		46	#define require101(exp) exp
		47	#else
		48	#define require101(exp) equire (exp)
		49	#endif
30		50
31	#include "conf.h"	51	#include "conf.h"
32	#include "slog.h"	52	#include "slog.h"
33	#include "device.h"	53	#include "device.h"
34	#include "vpn.h"	54	#include "vpn.h"
35	#include "connection.h"	55	#include "connection.h"
		56	#include "hkdf.h"
36		57
37	#include "netcompat.h"	58	#include "netcompat.h"
38		59
39	#if !HAVE_RAND_PSEUDO_BYTES
40	# define RAND_pseudo_bytes RAND_bytes
41	#endif
42
43	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	60	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
		61	#define MAGIC "HUHN\xbd\xc6\xdb\x82" // 8 bytes of magic//D
44		62
45	#define ULTRA_FAST 1	63	#define ULTRA_FAST 1
46	#define HLOG 15	64	#define HLOG 15
47	#include "lzf/lzf.h"	65	#include "lzf/lzf.h"
48	#include "lzf/lzf_c.c"	66	#include "lzf/lzf_c.c"
49	#include "lzf/lzf_d.c"	67	#include "lzf/lzf_d.c"
50		68
		69	//////////////////////////////////////////////////////////////////////////////
		70
		71	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		72	static ev::child rs_child_ev;
		73
		74	namespace
		75	{
		76	void // c++ requires external linkage here, apparently :(
		77	rs_child_cb (ev::child &w, int revents)
		78	{
		79	w.stop ();
		80
		81	if (rs_queue.empty ())
		82	return;
		83
		84	pid_t pid = run_script (*rs_queue.front ().first, false);
		85	if (pid)
		86	{
		87	w.set (pid);
		88	w.start ();
		89	}
		90	else
		91	slog (L_WARN, rs_queue.front ().second);
		92
		93	delete rs_queue.front ().first;
		94	rs_queue.pop ();
		95	}
		96	};
		97
		98	// despite the fancy name, this is quite a hack
		99	static void
		100	run_script_queued (run_script_cb cb, const char warnmsg)
		101	{
		102	rs_queue.push (std::make_pair (cb, warnmsg));
		103
		104	if (!rs_child_ev.is_active ())
		105	{
		106	rs_child_ev.set<rs_child_cb> ();
		107	rs_child_ev ();
		108	}
		109	}
		110
		111	//////////////////////////////////////////////////////////////////////////////
		112
51	struct crypto_ctx	113	struct crypto_ctx
52	{	114	{
53	EVP_CIPHER_CTX cctx;	115	EVP_CIPHER_CTX cctx;
54	HMAC_CTX hctx;	116	HMAC_CTX hctx;
55		117
56	crypto_ctx (const rsachallenge &challenge, int enc);	118	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
57	~crypto_ctx ();	119	~crypto_ctx ();
58	};	120	};
59		121
60	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	122	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
61	{	123	{
		124	ecdh_key s;
		125
		126	curve25519_combine (a, b, s);
		127
		128	{
		129	u8 mac_key[MAC_KEYSIZE];
		130	static const unsigned char mac_info[] = "gvpe mac key";
		131
		132	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		133	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		134	kdf.extract (s, sizeof (s));
		135	kdf.extract_done (HKDF_PRF_HASH ());
		136	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		137
		138	HMAC_CTX_init (&hctx);
		139	require101 (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		140	}
		141
		142	{
		143	u8 cipher_key[CIPHER_KEYSIZE];
		144	static const unsigned char cipher_info[] = "gvpe cipher key";
		145
		146	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		147	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		148	kdf.extract (s, sizeof (s));
		149	kdf.extract_done (HKDF_PRF_HASH ());
		150	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		151
62	EVP_CIPHER_CTX_init (&cctx);	152	EVP_CIPHER_CTX_init (&cctx);
63	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	153	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
64	HMAC_CTX_init (&hctx);	154	}
65	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
66	}	155	}
67		156
68	crypto_ctx::~crypto_ctx ()	157	crypto_ctx::~crypto_ctx ()
69	{	158	{
70	require (EVP_CIPHER_CTX_cleanup (&cctx));	159	require (EVP_CIPHER_CTX_cleanup (&cctx));
71	HMAC_CTX_cleanup (&hctx);	160	HMAC_CTX_cleanup (&hctx);
72	}	161	}
73		162
		163	static inline void
		164	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		165	{
		166	if (RSA_public_encrypt (sizeof (auth.rsa),
		167	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		168	key, RSA_PKCS1_OAEP_PADDING) < 0)
		169	fatal ("RSA_public_encrypt error");
		170
		171	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		172	}
		173
		174	static inline bool
		175	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		176	{
		177	u8 rsa_decrypt[RSA_KEYLEN];
		178
		179	if (RSA_private_decrypt (sizeof (encr.rsa),
		180	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		181	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		182	return 0;
		183
		184	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		185	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		186
		187	return 1;
		188	}
		189
74	static void	190	static void
75	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	191	auth_hash (const auth_data &auth, const ecdh_key &b, auth_mac &mac)
76	{	192	{
77	EVP_MD_CTX ctx;	193	hkdf kdf (b, sizeof b, AUTH_DIGEST ()); // use response ecdh b as salt
78		194	kdf.extract (&auth.rsa, sizeof (auth.rsa));
79	EVP_MD_CTX_init (&ctx);	195	kdf.extract_done ();
80	require (EVP_DigestInit (&ctx, RSA_HASH));	196	kdf.expand (mac, sizeof mac, auth.ecdh, sizeof (auth.ecdh)); // use challenge ecdh b as info
81	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));
82	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
83	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
84	EVP_MD_CTX_cleanup (&ctx);
85	}	197	}
86		198
87	struct rsa_entry {	199	void
88	tstamp expire;	200	connection::generate_auth_data ()
89	rsaid id;
90	rsachallenge chg;
91	};
92
93	struct rsa_cache : list<rsa_entry>
94	{	201	{
95	void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;	202	if (auth_expire < ev_now ())
96
97	bool find (const rsaid &id, rsachallenge &chg)
98	{
99	for (iterator i = begin (); i != end (); ++i)
100	{	203	{
101	if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev::ev_now ())	204	// request data
102	{	205	rand_fill (snd_auth.rsa);
103	memcpy (&chg, &i->chg, sizeof chg);	206	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
104		207
105	erase (i);	208	// eventual response data
106	return true;	209	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
107	}
108	}	210	}
109		211
110	if (!cleaner.is_active ())	212	// every use prolongs the expiry
111	cleaner.again ();
112
113	return false;
114	}
115
116	void gen (rsaid &id, rsachallenge &chg)
117	{
118	rsa_entry e;
119
120	RAND_bytes ((unsigned char *)&id, sizeof id);
121	RAND_bytes ((unsigned char *)&chg, sizeof chg);
122
123	e.expire = ev::ev_now () + RSA_TTL;	213	auth_expire = ev_now () + AUTH_TTL;
124	e.id = id;
125	memcpy (&e.chg, &chg, sizeof chg);
126
127	push_back (e);
128
129	if (!cleaner.is_active ())
130	cleaner.again ();
131	}
132
133	rsa_cache ()
134	: cleaner (this, &rsa_cache::cleaner_cb)
135	{
136	cleaner.set (RSA_TTL, RSA_TTL);
137	}
138
139	} rsa_cache;
140
141	void rsa_cache::cleaner_cb (ev::timer &w, int revents)
142	{
143	if (empty ())
144	w.stop ();
145	else
146	{
147	for (iterator i = begin (); i != end (); )
148	if (i->expire <= ev::ev_now ())
149	i = erase (i);
150	else
151	++i;
152	}
153	}	214	}
154		215
155	//////////////////////////////////////////////////////////////////////////////	216	//////////////////////////////////////////////////////////////////////////////
156		217
157	void pkt_queue::put (net_packet *p)	218	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		219	: max_ttl (max_ttl), max_queue (max_queue)
158	{	220	{
159	if (queue[i])	221	queue = new pkt [max_queue];
160	{
161	delete queue[i];
162	j = (j + 1) % QUEUEDEPTH;
163	}
164		222
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;	223	i = 0;
187	j = 0;	224	j = 0;
		225
		226	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
188	}	227	}
189		228
190	pkt_queue::~pkt_queue ()	229	pkt_queue::~pkt_queue ()
191	{	230	{
192	for (i = QUEUEDEPTH; --i > 0; )	231	while (net_packet *p = get ())
		232	delete p;
		233
193	delete queue[i];	234	delete [] queue;
194	}	235	}
195		236
		237	void
		238	pkt_queue::expire_cb (ev::timer &w, int revents)
		239	{
		240	ev_tstamp expire = ev_now () - max_ttl;
		241
		242	for (;;)
		243	{
		244	if (empty ())
		245	break;
		246
		247	double diff = queue[j].tstamp - expire;
		248
		249	if (diff >= 0.)
		250	{
		251	w.start (diff > 0.5 ? diff : 0.5);
		252	break;
		253	}
		254
		255	delete get ();
		256	}
		257	}
		258
		259	void
		260	pkt_queue::put (net_packet *p)
		261	{
		262	ev_tstamp now = ev_now ();
		263
		264	// start expiry timer
		265	if (empty ())
		266	expire.start (max_ttl);
		267
		268	int ni = i + 1 == max_queue ? 0 : i + 1;
		269
		270	if (ni == j)
		271	delete get ();
		272
		273	queue[i].pkt = p;
		274	queue[i].tstamp = now;
		275
		276	i = ni;
		277	}
		278
		279	net_packet *
		280	pkt_queue::get ()
		281	{
		282	if (empty ())
		283	return 0;
		284
		285	net_packet *p = queue[j].pkt;
		286	queue[j].pkt = 0;
		287
		288	j = j + 1 == max_queue ? 0 : j + 1;
		289
		290	return p;
		291	}
		292
196	struct net_rateinfo {	293	struct net_rateinfo
		294	{
197	u32 host;	295	u32 host;
198	double pcnt, diff;	296	double pcnt, diff;
199	tstamp last;	297	tstamp last;
200	};	298	};
201		299
211		309
212	bool can (const sockinfo &si) { return can((u32)si.host); }	310	bool can (const sockinfo &si) { return can((u32)si.host); }
213	bool can (u32 host);	311	bool can (u32 host);
214	};	312	};
215		313
216	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	314	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
217		315
		316	bool
218	bool net_rate_limiter::can (u32 host)	317	net_rate_limiter::can (u32 host)
219	{	318	{
220	iterator i;	319	iterator i;
221		320
222	for (i = begin (); i != end (); )	321	for (i = begin (); i != end (); )
223	if (i->host == host)	322	if (i->host == host)
224	break;	323	break;
225	else if (i->last < ev::ev_now () - NRL_EXPIRE)	324	else if (i->last < ev_now () - NRL_EXPIRE)
226	i = erase (i);	325	i = erase (i);
227	else	326	else
228	i++;	327	i++;
229		328
230	if (i == end ())	329	if (i == end ())
…		…
232	net_rateinfo ri;	331	net_rateinfo ri;
233		332
234	ri.host = host;	333	ri.host = host;
235	ri.pcnt = 1.;	334	ri.pcnt = 1.;
236	ri.diff = NRL_MAXDIF;	335	ri.diff = NRL_MAXDIF;
237	ri.last = ev::ev_now ();	336	ri.last = ev_now ();
238		337
239	push_front (ri);	338	push_front (ri);
240		339
241	return true;	340	return true;
242	}	341	}
…		…
244	{	343	{
245	net_rateinfo ri (*i);	344	net_rateinfo ri (*i);
246	erase (i);	345	erase (i);
247		346
248	ri.pcnt = ri.pcnt * NRL_ALPHA;	347	ri.pcnt = ri.pcnt * NRL_ALPHA;
249	ri.diff = ri.diff * NRL_ALPHA + (ev::ev_now () - ri.last);	348	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
250		349
251	ri.last = ev::ev_now ();	350	ri.last = ev_now ();
252		351
253	double dif = ri.diff / ri.pcnt;	352	double dif = ri.diff / ri.pcnt;
254		353
255	bool send = dif > NRL_CUTOFF;	354	bool send = dif > NRL_CUTOFF;
256		355
…		…
268	}	367	}
269	}	368	}
270		369
271	/////////////////////////////////////////////////////////////////////////////	370	/////////////////////////////////////////////////////////////////////////////
272		371
273	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	372	void
274
275	void hmac_packet::hmac_gen (crypto_ctx *ctx)	373	hmac_packet::hmac_gen (crypto_ctx ctx, u8 hmac_digest)
276	{	374	{
277	unsigned int xlen;
278
279	HMAC_CTX *hctx = &ctx->hctx;	375	HMAC_CTX *hctx = &ctx->hctx;
280		376
281	HMAC_Init_ex (hctx, 0, 0, 0, 0);	377	require101 (HMAC_Init_ex (hctx, 0, 0, 0, 0));
282	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	378	require101 (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), len - sizeof (hmac_packet)));
283	len - sizeof (hmac_packet));	379	require101 (HMAC_Final (hctx, hmac_digest, 0));
284	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);
285	}	380	}
286		381
287	void	382	void
288	hmac_packet::hmac_set (crypto_ctx *ctx)	383	hmac_packet::hmac_set (crypto_ctx *ctx)
289	{	384	{
290	hmac_gen (ctx);	385	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
291		386	hmac_gen (ctx, hmac_digest);
292	memcpy (hmac, hmac_digest, HMACLENGTH);	387	memcpy (hmac, hmac_digest, HMACLENGTH);
293	}	388	}
294		389
295	bool	390	bool
296	hmac_packet::hmac_chk (crypto_ctx *ctx)	391	hmac_packet::hmac_chk (crypto_ctx *ctx)
297	{	392	{
298	hmac_gen (ctx);	393	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
299		394	hmac_gen (ctx, hmac_digest);
300	return !memcmp (hmac, hmac_digest, HMACLENGTH);	395	return !memcmp (hmac, hmac_digest, HMACLENGTH);
301	}	396	}
302		397
		398	void
303	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	399	vpn_packet::set_hdr (ptype type_, unsigned int dst)
304	{	400	{
305	type = type_;	401	type = type_;
306		402
307	int src = THISNODE->id;	403	int src = THISNODE->id;
308		404
…		…
313		409
314	#define MAXVPNDATA (MAX_MTU - 6 - 6)	410	#define MAXVPNDATA (MAX_MTU - 6 - 6)
315	#define DATAHDR (sizeof (u32) + RAND_SIZE)	411	#define DATAHDR (sizeof (u32) + RAND_SIZE)
316		412
317	struct vpndata_packet : vpn_packet	413	struct vpndata_packet : vpn_packet
		414	{
		415	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		416
		417	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		418	tap_packet unpack (connection conn, u32 &seqno);
		419
		420	private:
		421	const u32 data_hdr_size () const
318	{	422	{
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;	423	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
328	}
329	};	424	}
		425	};
330		426
331	void	427	void
332	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	428	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
333	{	429	{
334	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	430	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
336	ptype type = PT_DATA_UNCOMPRESSED;	432	ptype type = PT_DATA_UNCOMPRESSED;
337		433
338	#if ENABLE_COMPRESSION	434	#if ENABLE_COMPRESSION
339	u8 cdata[MAX_MTU];	435	u8 cdata[MAX_MTU];
340		436
341	if (conn->features & ENABLE_COMPRESSION)	437	if (conn->features & FEATURE_COMPRESSION)
342	{	438	{
343	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	439	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
344		440
345	if (cl)	441	if (cl)
346	{	442	{
…		…
352	d[1] = cl;	448	d[1] = cl;
353	}	449	}
354	}	450	}
355	#endif	451	#endif
356		452
357	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	453	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
358		454
359	struct {	455	struct {
360	#if RAND_SIZE	456	#if RAND_SIZE
361	u8 rnd[RAND_SIZE];	457	u8 rnd[RAND_SIZE];
362	#endif	458	#endif
363	u32 seqno;	459	u32 seqno;
364	} datahdr;	460	} datahdr;
365		461
366	datahdr.seqno = ntohl (seqno);	462	datahdr.seqno = ntohl (seqno);
367	#if RAND_SIZE	463	#if RAND_SIZE
368	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	464	// NB: a constant (per session) random prefix
		465	// is likely enough, but we don't take any chances.
		466	conn->oiv.get (datahdr.rnd, RAND_SIZE);
369	#endif	467	#endif
370		468
371	require (EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
372	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
373	(unsigned char *) &datahdr, DATAHDR));	471	(unsigned char *) &datahdr, DATAHDR));
…		…
395	int outl = 0, outl2;	493	int outl = 0, outl2;
396	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
397	u8 *d;	495	u8 *d;
398	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
399		497
400	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
401		499
402	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
403	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
404		502
405	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
406	d = cdata;	504	d = cdata;
407	else	505	else
408	#endif	506	#endif
409	d = &(*p)[6 + 6 - DATAHDR];	507	d = &(*p)[6 + 6] - DATAHDR;
410		508
411	/* this overwrites part of the src mac, but we fix that later */	509	// we play do evil games with the struct layout atm.
		510	// pending better solutions, we at least do some verification.
		511	// this is fine, as we left ISO territory long ago.
		512	require (DATAHDR <= 16);
		513	require ((u8 )(&p->len + 1) == &(p)[0]);
		514
		515	// this can overwrite the len/dst/src fields
412	require (EVP_DecryptUpdate (cctx,	516	require (EVP_DecryptUpdate (cctx,
413	d, &outl2,	517	d, &outl2,
414	(unsigned char *)&data, len - data_hdr_size ()));	518	(unsigned char *)&data, len - data_hdr_size ()));
415	outl += outl2;	519	outl += outl2;
416		520
…		…
447	}	551	}
448	};	552	};
449		553
450	struct config_packet : vpn_packet	554	struct config_packet : vpn_packet
451	{	555	{
452	// actually, hmaclen cannot be checked because the hmac	556	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;	557	u8 prot_major, prot_minor, randsize;
456	u8 flags, challengelen, features, pad3;	558	u8 flags, features, pad6, pad7, pad8;
457	u32 cipher_nid, digest_nid, hmac_nid;	559	u32 cipher_nid, mac_nid, auth_nid;
458		560
459	void setup (ptype type, int dst);	561	void setup (ptype type, int dst);
460	bool chk_config () const;	562	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
461		563
462	static u8 get_features ()	564	static u8 get_features ()
463	{	565	{
464	u8 f = 0;	566	u8 f = 0;
465	#if ENABLE_COMPRESSION	567	#if ENABLE_COMPRESSION
…		…
473	#endif	575	#endif
474	return f;	576	return f;
475	}	577	}
476	};	578	};
477		579
		580	void
478	void config_packet::setup (ptype type, int dst)	581	config_packet::setup (ptype type, int dst)
479	{	582	{
480	prot_major = PROTOCOL_MAJOR;	583	prot_major = PROTOCOL_MAJOR;
481	prot_minor = PROTOCOL_MINOR;	584	prot_minor = PROTOCOL_MINOR;
482	randsize = RAND_SIZE;	585	randsize = RAND_SIZE;
483	hmaclen = HMACLENGTH;
484	flags = 0;	586	flags = 0;
485	challengelen = sizeof (rsachallenge);
486	features = get_features ();	587	features = get_features ();
487		588
		589	strncpy ((char *)serial, conf.serial, sizeof (serial));
		590
488	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	591	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
489	digest_nid = htonl (EVP_MD_type (RSA_HASH));
490	hmac_nid = htonl (EVP_MD_type (DIGEST));	592	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		593	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
491		594
492	len = sizeof (*this) - sizeof (net_packet);	595	len = sizeof (*this) - sizeof (net_packet);
493	set_hdr (type, dst);	596	set_hdr (type, dst);
494	}	597	}
495		598
496	bool config_packet::chk_config () const	599	bool
		600	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
497	{	601	{
498	if (prot_major != PROTOCOL_MAJOR)	602	if (prot_major != PROTOCOL_MAJOR)
499	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	603	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		604	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
500	else if (randsize != RAND_SIZE)	605	else if (randsize != RAND_SIZE)
501	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	606	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
502	else if (hmaclen != HMACLENGTH)	607	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
503	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
504	else if (challengelen != sizeof (rsachallenge))
505	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
506	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	608	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
507	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	609	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
508	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	610	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
509	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
510	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	611	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
511	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	612	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		613	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		614	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		615	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		616	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
512	else	617	else
		618	{
		619	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		620
		621	if (cmp > 0)
		622	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		623	conf->nodename, (const char *)rsi);
		624	else if (cmp == 0)
513	return true;	625	return true;
		626	}
514		627
515	return false;	628	return false;
516	}	629	}
517		630
518	struct auth_req_packet : config_packet	631	struct auth_req_packet : config_packet // UNPROTECTED
519	{	632	{
520	char magic[8];	633	char magic[8];
521	u8 initiate; // false if this is just an automatic reply	634	u8 initiate; // false if this is just an automatic reply
522	u8 protocols; // supported protocols (will be patched on forward)	635	u8 protocols; // supported protocols (will be patched on forward)
523	u8 pad2, pad3;	636	u8 pad2, pad3;
524	rsaid id;	637	auth_encr encr;
525	rsaencrdata encr;
526		638
527	auth_req_packet (int dst, bool initiate_, u8 protocols_)	639	auth_req_packet (int dst, bool initiate_, u8 protocols_)
528	{	640	{
529	config_packet::setup (PT_AUTH_REQ, dst);	641	config_packet::setup (PT_AUTH_REQ, dst);
530	strncpy (magic, MAGIC, 8);	642	memcpy (magic, MAGIC, 8);
531	initiate = !!initiate_;	643	initiate = !!initiate_;
532	protocols = protocols_;	644	protocols = protocols_;
533		645
534	len = sizeof (*this) - sizeof (net_packet);	646	len = sizeof (*this) - sizeof (net_packet);
535	}	647	}
536	};	648	};
537		649
538	struct auth_res_packet : config_packet	650	struct auth_res_packet : vpn_packet // UNPROTECTED
539	{	651	{
540	rsaid id;
541	u8 pad1, pad2, pad3;
542	u8 response_len; // encrypted length
543	rsaresponse response;	652	auth_response response;
544		653
545	auth_res_packet (int dst)	654	auth_res_packet (int dst)
546	{	655	{
547	config_packet::setup (PT_AUTH_RES, dst);	656	set_hdr (PT_AUTH_RES, dst);
548		657
549	len = sizeof (*this) - sizeof (net_packet);	658	len = sizeof (*this) - sizeof (net_packet);
550	}	659	}
551	};	660	};
552		661
…		…
582	};	691	};
583		692
584	/////////////////////////////////////////////////////////////////////////////	693	/////////////////////////////////////////////////////////////////////////////
585		694
586	void	695	void
587	connection::connection_established ()	696	connection::connection_established (const sockinfo &rsi)
588	{	697	{
589	slog (L_TRACE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);	698	if (!have_snd_auth \|\| !have_rcv_auth)
		699	return;
590		700
		701	si = rsi;
		702	protocol = rsi.prot;
		703
		704	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		705	conf->nodename, (const char *)rsi,
		706	is_direct ? "direct" : "forwarded",
		707	PROTOCOL_MAJOR, prot_minor);
		708
		709	if (::conf.script_node_up)
		710	{
		711	run_script_cb *cb = new run_script_cb;
		712	cb->set<connection, &connection::script_node_up> (this);
		713	run_script_queued (cb, _("node-up command execution failed, continuing."));
		714	}
		715
		716	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		717	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		718
		719	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		720	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		721
		722	oiv.reset ();
		723
		724	// make sure rekeying timeouts are slightly asymmetric
		725	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		726	rekey.start (rekey_interval, rekey_interval);
		727
		728	keepalive.start (::conf.keepalive);
		729
		730	// send queued packets
591	if (ictx && octx)	731	if (ictx && octx)
592	{	732	{
593	connectmode = conf->connectmode;	733	while (tap_packet p = (tap_packet )data_queue.get ())
594
595	// make sure rekeying timeouts are slightly asymmetric
596	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
597	rekey.start (rekey_interval, rekey_interval);
598	keepalive.start (::conf.keepalive);
599
600	// send queued packets
601	if (ictx && octx)
602	{	734	{
603	while (tap_packet p = (tap_packet )data_queue.get ())
604	{
605	send_data_packet (p);	735	if (p->len) send_data_packet (p);
606	delete p;	736	delete p;
607	}
608
609	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
610	{
611	send_vpn_packet (p, si, IPTOS_RELIABILITY);
612	delete p;
613	}
614	}	737	}
		738
		739	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		740	{
		741	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
		742	delete p;
		743	}
615	}	744	}
		745
		746	vpn->connection_established (this);
		747	}
		748
		749	void
		750	connection::reset_si ()
		751	{
		752	if (vpn->can_direct (THISNODE, conf))
		753	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
616	else	754	else
617	{	755	{
618	retry_cnt = 0;
619	establish_connection.start (5);
620	keepalive.stop ();
621	rekey.stop ();
622	}
623	}
624
625	void
626	connection::reset_si ()
627	{
628	protocol = best_protocol (THISNODE->protocols & conf->protocols);
629
630	// mask out protocols we cannot establish
631	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
632	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
633	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
634
635	if (protocol
636	&& (!conf->can_direct (THISNODE)
637	\|\| !THISNODE->can_direct (conf)))
638	{
639	slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename);	756	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
640	protocol = 0;	757	protocol = 0;
641	}	758	}
642		759
643	si.set (conf, protocol);	760	si.set (conf, protocol);
		761
		762	is_direct = si.valid ();
644	}	763	}
645		764
646	// ensure sockinfo is valid, forward if necessary	765	// ensure sockinfo is valid, forward if necessary
647	const sockinfo &	766	const sockinfo &
648	connection::forward_si (const sockinfo &si) const	767	connection::forward_si (const sockinfo &si) const
649	{	768	{
650	if (!si.valid ())	769	if (!si.valid ())
651	{	770	{
652	connection *r = vpn->find_router ();	771	connection *r = vpn->find_router_for (this);
653		772
654	if (r)	773	if (r)
655	{	774	{
656	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	775	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
657	conf->nodename, r->conf->nodename, (const char *)r->si);	776	conf->nodename, r->conf->nodename);
658	return r->si;	777	return r->si;
659	}	778	}
660	else	779	else
661	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	780	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
662	conf->nodename);	781	conf->nodename);
663	}	782	}
664		783
665	return si;	784	return si;
666	}	785	}
…		…
676	connection::send_ping (const sockinfo &si, u8 pong)	795	connection::send_ping (const sockinfo &si, u8 pong)
677	{	796	{
678	ping_packet *pkt = new ping_packet;	797	ping_packet *pkt = new ping_packet;
679		798
680	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	799	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		800
		801	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
681	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	802	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
682		803
683	delete pkt;	804	delete pkt;
684	}	805	}
685		806
…		…
700	void	821	void
701	connection::send_auth_request (const sockinfo &si, bool initiate)	822	connection::send_auth_request (const sockinfo &si, bool initiate)
702	{	823	{
703	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	824	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
704		825
705	rsachallenge chg;	826	generate_auth_data ();
706	rsa_cache.gen (pkt->id, chg);
707	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	827	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
708		828
709	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	829	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
710
711	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	830	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
712		831
713	delete pkt;	832	delete pkt;
714	}	833	}
715		834
716	void	835	void
717	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	836	connection::send_auth_response (const sockinfo &si)
718	{	837	{
719	auth_res_packet *pkt = new auth_res_packet (conf->id);	838	auth_res_packet *pkt = new auth_res_packet (conf->id);
720		839
721	pkt->id = id;	840	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof rcv_ecdh_b);
		841	auth_hash (rcv_auth, rcv_ecdh_b, pkt->response.mac);
722		842
723	rsa_hash (id, chg, pkt->response);
724
725	pkt->hmac_set (octx);
726
727	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	843	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
728
729	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	844	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
730		845
731	delete pkt;	846	delete pkt;
732	}	847	}
733		848
734	void	849	void
735	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	850	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
736	{	851	{
737	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)",	852	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
738	conf->id, rid, (const char *)rsi);	853	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		854	conf->protocols);
739		855
740	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	856	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
741		857
742	r->hmac_set (octx);	858	r->hmac_set (octx);
743	send_vpn_packet (r, si);	859	send_vpn_packet (r, si);
744		860
745	delete r;	861	delete r;
746	}	862	}
747		863
748	void	864	inline void
749	connection::establish_connection_cb (ev::timer &w, int revents)	865	connection::establish_connection_cb (ev::timer &w, int revents)
750	{	866	{
751	if (!ictx	867	if (!(ictx && octx)
752	&& conf != THISNODE	868	&& conf != THISNODE
753	&& connectmode != conf_node::C_NEVER	869	&& connectmode != conf_node::C_NEVER
754	&& connectmode != conf_node::C_DISABLED	870	&& connectmode != conf_node::C_DISABLED
755	&& !w.is_active ())	871	&& !w.is_active ())
756	{	872	{
		873	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		874	// and stop trying. should probably be handled by a per-connection expire handler.
		875	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		876	{
		877	reset_connection ();
		878	return;
		879	}
		880
		881	last_establish_attempt = ev_now ();
		882
757	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3	883	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
758	? (retry_cnt & 3) + 1	884	? (retry_cnt & 3) + 1
759	: 1 << (retry_cnt >> 2));	885	: 1 << (retry_cnt >> 2));
760		886
761	reset_si ();	887	reset_si ();
762		888
763	bool slow = si.prot & PROT_SLOW;	889	bool slow = si.prot & PROT_SLOW;
764		890
765	if (si.prot && !si.host)	891	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
766	{	892	{
767	slog (L_TRACE, _("%s: connection request (indirect)"), conf->nodename);
768	/TODO/ /* start the timer so we don't recurse endlessly */	893	/TODO/ /* start the timer so we don't recurse endlessly */
769	w.start (1);	894	w.start (1);
770	vpn->send_connect_request (conf->id);	895	vpn->send_connect_request (this);
771	}	896	}
772	else	897	else
773	{	898	{
774	slog (L_TRACE, _("%s: connection request (direct)"), conf->nodename, !!ictx, !!octx);	899	if (si.valid ())
		900	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		901	conf->nodename, (const char *)si);
775		902
776	const sockinfo &dsi = forward_si (si);	903	const sockinfo &dsi = forward_si (si);
777		904
778	slow = slow \|\| (dsi.prot & PROT_SLOW);	905	slow = slow \|\| (dsi.prot & PROT_SLOW);
779		906
…		…
784	else	911	else
785	send_ping (dsi, 0);	912	send_ping (dsi, 0);
786	}	913	}
787	}	914	}
788		915
789	retry_int *= slow ? 8. : 0.7;	916	retry_int *= slow ? 8. : 0.9;
790		917
791	if (retry_int < conf->max_retry)	918	if (retry_int < conf->max_retry)
792	retry_cnt++;	919	retry_cnt++;
793	else	920	else
794	retry_int = conf->max_retry;	921	retry_int = conf->max_retry;
…		…
804	{	931	{
805	slog (L_INFO, _("%s(%s): connection lost"),	932	slog (L_INFO, _("%s(%s): connection lost"),
806	conf->nodename, (const char *)si);	933	conf->nodename, (const char *)si);
807		934
808	if (::conf.script_node_down)	935	if (::conf.script_node_down)
809	if (!run_script (run_script_cb (this, &connection::script_node_down), false))	936	{
		937	run_script_cb *cb = new run_script_cb;
		938	cb->set<connection, &connection::script_node_down> (this);
810	slog (L_WARN, _("node-down command execution failed, continuing."));	939	run_script_queued (cb, _("node-down command execution failed, continuing."));
		940	}
811	}	941	}
812		942
813	delete ictx; ictx = 0;	943	delete ictx; ictx = 0;
814	delete octx; octx = 0;	944	delete octx; octx = 0;
815	#if ENABLE_DNS
816	dnsv4_reset_connection ();
817	#endif
818		945
819	si.host = 0;	946	si.host = 0;
820		947
		948	have_snd_auth = false;
		949	have_rcv_auth = false;
		950	auth_expire = 0.;
		951
821	last_activity = 0;	952	last_activity = 0.;
		953	//last_si_change = 0.;
822	retry_cnt = 0;	954	retry_cnt = 0;
823		955
824	rekey.stop ();	956	rekey.stop ();
825	keepalive.stop ();	957	keepalive.stop ();
826	establish_connection.stop ();	958	establish_connection.stop ();
…		…
833	send_reset (si);	965	send_reset (si);
834		966
835	reset_connection ();	967	reset_connection ();
836	}	968	}
837		969
838	void	970	// poor-man's rekeying
		971	inline void
839	connection::rekey_cb (ev::timer &w, int revents)	972	connection::rekey_cb (ev::timer &w, int revents)
840	{	973	{
841	reset_connection ();	974	reset_connection ();
842	establish_connection ();	975	establish_connection ();
843	}	976	}
…		…
860	if (oseqno > MAX_SEQNO)	993	if (oseqno > MAX_SEQNO)
861	rekey ();	994	rekey ();
862	}	995	}
863		996
864	void	997	void
		998	connection::post_inject_queue ()
		999	{
		1000	// force a connection every now and when when packets are sent (max 1/s)
		1001	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		1002	establish_connection.stop ();
		1003
		1004	establish_connection ();
		1005	}
		1006
		1007	void
865	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1008	connection::inject_data_packet (tap_packet *pkt)
866	{	1009	{
867	if (ictx && octx)	1010	if (ictx && octx)
868	send_data_packet (pkt);	1011	send_data_packet (pkt);
869	else	1012	else
870	{	1013	{
871	if (!broadcast)
872	data_queue.put (new tap_packet (*pkt));	1014	data_queue.put (new tap_packet (*pkt));
873		1015	post_inject_queue ();
874	establish_connection ();
875	}	1016	}
876	}	1017	}
877		1018
		1019	void
878	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1020	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
879	{	1021	{
880	if (ictx && octx)	1022	if (ictx && octx)
881	send_vpn_packet (pkt, si, tos);	1023	send_vpn_packet (pkt, si, tos);
882	else	1024	else
883	{	1025	{
884	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1026	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
885		1027	post_inject_queue ();
886	establish_connection ();
887	}	1028	}
888	}	1029	}
889		1030
890	void	1031	void
891	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1032	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
892	{	1033	{
893	last_activity = ev::ev_now ();	1034	last_activity = ev_now ();
894		1035
895	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1036	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
896	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1037	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
897		1038
898	if (connectmode == conf_node::C_DISABLED)	1039	if (connectmode == conf_node::C_DISABLED)
899	return;	1040	return;
900		1041
901	switch (pkt->typ ())	1042	switch (pkt->typ ())
902	{	1043	{
903	case vpn_packet::PT_PING:	1044	case vpn_packet::PT_PING:
		1045	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1046
904	// we send pings instead of auth packets after some retries,	1047	// we send pings instead of auth packets after some retries,
905	// so reset the retry counter and establish a connection	1048	// so reset the retry counter and establish a connection
906	// when we receive a ping.	1049	// when we receive a ping.
907	if (!ictx)	1050	if (!ictx)
908	{	1051	{
909	if (auth_rate_limiter.can (rsi))	1052	if (auth_rate_limiter.can (rsi))
910	send_auth_request (rsi, true);	1053	send_auth_request (rsi, true);
911	}	1054	}
912	else	1055	else
		1056	// we would love to change the socket address here, but ping's aren't
		1057	// authenticated, so we best ignore it.
913	send_ping (rsi, 1); // pong	1058	send_ping (rsi, 1); // pong
914		1059
915	break;	1060	break;
916		1061
917	case vpn_packet::PT_PONG:	1062	case vpn_packet::PT_PONG:
		1063	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1064
		1065	// a PONG might mean that the other side doesn't really know
		1066	// about our desire for communication.
		1067	establish_connection ();
918	break;	1068	break;
919		1069
920	case vpn_packet::PT_RESET:	1070	case vpn_packet::PT_RESET:
921	{	1071	{
922	reset_connection ();	1072	reset_connection ();
923		1073
924	config_packet p = (config_packet ) pkt;	1074	config_packet p = (config_packet ) pkt;
925		1075
926	if (!p->chk_config ())	1076	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
927	{
928	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
929	conf->nodename, (const char *)rsi);
930	connectmode = conf_node::C_DISABLED;
931	}
932	else if (connectmode == conf_node::C_ALWAYS)
933	establish_connection ();	1077	establish_connection ();
934	}	1078	}
935	break;	1079	break;
936		1080
937	case vpn_packet::PT_AUTH_REQ:	1081	case vpn_packet::PT_AUTH_REQ:
938	if (auth_rate_limiter.can (rsi))	1082	if (auth_rate_limiter.can (rsi))
939	{	1083	{
940	auth_req_packet p = (auth_req_packet ) pkt;	1084	auth_req_packet p = (auth_req_packet )pkt;
941		1085
942	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1086	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1087	conf->nodename, p->initiate ? "initiate" : "reply",
		1088	p->protocols, p->features);
943		1089
944	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1090	if (memcmp (p->magic, MAGIC, 8))
		1091	{
		1092	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1093	conf->nodename, (const char *)rsi);
		1094	}
		1095	else if (p->chk_config (conf, rsi))
945	{	1096	{
946	if (p->prot_minor != PROTOCOL_MINOR)	1097	if (p->prot_minor != PROTOCOL_MINOR)
947	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1098	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
948	conf->nodename, (const char *)rsi,	1099	conf->nodename, (const char *)rsi,
949	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1100	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
950		1101
951	if (p->initiate)	1102	if (p->initiate)
952	send_auth_request (rsi, false);	1103	send_auth_request (rsi, false);
953		1104
954	rsachallenge k;	1105	auth_data auth;
955		1106
956	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1107	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
957	{	1108	{
958	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1109	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
959	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1110	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
960	break;
961	}	1111	}
962	else	1112	else
963	{	1113	{
964	delete octx;	1114	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
965		1115
966	octx = new crypto_ctx (k, 1);	1116	rcv_auth = auth;
967	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1117	have_rcv_auth = true;
968		1118
		1119	send_auth_response (rsi);
		1120
		1121	if (chg)
		1122	{
969	conf->protocols = p->protocols;	1123	conf->protocols = p->protocols;
970	features = p->features & config_packet::get_features ();	1124	features = p->features & config_packet::get_features ();
971		1125
972	send_auth_response (rsi, p->id, k);
973
974	connection_established ();	1126	connection_established (rsi);
975
976	break;	1127	}
977	}	1128	}
		1129
		1130	break;
978	}	1131	}
979	else
980	slog (L_WARN, _("%s(%s): protocol mismatch"),
981	conf->nodename, (const char *)rsi);
982		1132
983	send_reset (rsi);	1133	send_reset (rsi);
984	}	1134	}
985		1135
986	break;	1136	break;
987		1137
988	case vpn_packet::PT_AUTH_RES:	1138	case vpn_packet::PT_AUTH_RES:
989	{	1139	{
990	auth_res_packet p = (auth_res_packet ) pkt;	1140	auth_res_packet p = (auth_res_packet )pkt;
991		1141
992	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1142	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
993		1143
994	if (p->chk_config ())	1144	auth_mac local_mac;
		1145	auth_hash (snd_auth, p->response.ecdh, local_mac);
		1146
		1147	if (memcmp (&p->response.mac, local_mac, sizeof local_mac))
995	{	1148	{
996	if (p->prot_minor != PROTOCOL_MINOR)
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	{
1005	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1149	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
1006	conf->nodename, (const char *)rsi);	1150	conf->nodename, (const char *)rsi);
1007	break;
1008	}	1151	}
1009	else	1152	else if (!have_snd_auth)
1010	{	1153	{
1011	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1154	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
1012		1155
1013	if (!p->hmac_chk (cctx))	1156	have_snd_auth = true;
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);
1018	break;
1019	}
1020	else
1021	{
1022	rsaresponse h;
1023
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;
1029
1030	delete ictx; ictx = cctx;
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 ();	1157	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	if (!run_script (run_script_cb (this, &connection::script_node_up), false))
1045	slog (L_WARN, _("node-up command execution failed, continuing."));
1046
1047	break;
1048	}
1049	else
1050	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1051	conf->nodename, (const char *)rsi);
1052	}
1053
1054	delete cctx;
1055	}
1056	}	1158	}
1057	}	1159	}
1058
1059	send_reset (rsi);
1060	break;	1160	break;
1061		1161
1062	case vpn_packet::PT_DATA_COMPRESSED:	1162	case vpn_packet::PT_DATA_COMPRESSED:
1063	#if !ENABLE_COMPRESSION	1163	#if !ENABLE_COMPRESSION
1064	send_reset (rsi);	1164	send_reset (rsi);
…		…
1071	{	1171	{
1072	vpndata_packet p = (vpndata_packet )pkt;	1172	vpndata_packet p = (vpndata_packet )pkt;
1073		1173
1074	if (!p->hmac_chk (ictx))	1174	if (!p->hmac_chk (ictx))
1075	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1175	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1076	"could be an attack, or just corruption or a synchronization error"),	1176	"could be an attack, or just corruption or a synchronization error."),
1077	conf->nodename, (const char *)rsi);	1177	conf->nodename, (const char *)rsi);
1078	else	1178	else
1079	{	1179	{
1080	u32 seqno;	1180	u32 seqno;
1081	tap_packet *d = p->unpack (this, seqno);	1181	tap_packet *d = p->unpack (this, seqno);
		1182	int seqclass = iseqno.seqno_classify (seqno);
1082		1183
1083	if (iseqno.recv_ok (seqno))	1184	if (seqclass == 0) // ok
1084	{	1185	{
1085	vpn->tap->send (d);	1186	vpn->tap->send (d);
1086		1187
1087	if (si != rsi)	1188	if (si != rsi)
1088	{	1189	{
1089	// fast re-sync on source address changes, useful especially for tcp/ip	1190	// fast re-sync on source address changes, useful especially for tcp/ip
		1191	//if (last_si_change < ev_now () + 5.)
1090	si = rsi;	1192	// {
1091
1092	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1193	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1093	conf->nodename, (const char )si, (const char )rsi);	1194	conf->nodename, (const char )si, (const char )rsi);
		1195
		1196	si = rsi;
		1197
		1198	if (::conf.script_node_change)
		1199	{
		1200	run_script_cb *cb = new run_script_cb;
		1201	cb->set<connection, &connection::script_node_change> (this);
		1202	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1203	}
		1204
		1205	// }
		1206	//else
		1207	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1208	// conf->nodename, (const char )si, (const char )rsi);
1094	}	1209	}
		1210	}
		1211	else if (seqclass == 1) // far history
		1212	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1213	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1214	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1215	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1216	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1217	else if (seqclass == 3) // reset
		1218	{
		1219	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1220	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1221	send_reset (rsi);
1095	}	1222	}
1096		1223
1097	delete d;	1224	delete d;
1098	break;	1225	break;
1099	}	1226	}
…		…
1103	break;	1230	break;
1104		1231
1105	case vpn_packet::PT_CONNECT_REQ:	1232	case vpn_packet::PT_CONNECT_REQ:
1106	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1233	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1107	{	1234	{
1108	connect_req_packet p = (connect_req_packet ) pkt;	1235	connect_req_packet p = (connect_req_packet )pkt;
1109		1236
1110	if (p->id > 0 && p->id <= vpn->conns.size ())	1237	if (p->id > 0 && p->id <= vpn->conns.size ())
1111	{	1238	{
1112	connection *c = vpn->conns[p->id - 1];	1239	connection *c = vpn->conns[p->id - 1];
1113	conf->protocols = p->protocols;	1240	conf->protocols = p->protocols;
1114		1241
1115	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]",	1242	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1243	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1244	p->protocols,
1116	conf->id, p->id, c->ictx && c->octx);	1245	c->ictx && c->octx);
1117		1246
1118	if (c->ictx && c->octx)	1247	if (c->ictx && c->octx)
1119	{	1248	{
1120	// send connect_info packets to both sides, in case one is	1249	// send connect_info packets to both sides, in case one is
1121	// behind a nat firewall (or both ;)	1250	// behind a nat firewall (or both ;)
…		…
1144		1273
1145	c->conf->protocols = p->protocols;	1274	c->conf->protocols = p->protocols;
1146	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1275	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1147	p->si.upgrade_protocol (protocol, c->conf);	1276	p->si.upgrade_protocol (protocol, c->conf);
1148		1277
1149	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1278	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1150	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1279	conf->nodename,
		1280	vpn->conns[p->id - 1]->conf->nodename,
		1281	(const char *)p->si,
		1282	p->protocols,
		1283	protocol,
		1284	p->si.supported_protocols (c->conf),
		1285	!c->ictx && !c->octx);
1151		1286
1152	const sockinfo &dsi = forward_si (p->si);	1287	const sockinfo &dsi = forward_si (p->si);
1153		1288
1154	if (dsi.valid ())	1289	if (dsi.valid ())
1155	c->send_auth_request (dsi, true);	1290	c->send_auth_request (dsi, true);
		1291	else
		1292	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1293	vpn->conns[p->id - 1]->conf->nodename,
		1294	(const char *)p->si);
1156	}	1295	}
1157	else	1296	else
1158	slog (L_WARN,	1297	slog (L_WARN,
1159	_("received authenticated connection request from unknown node #%d, config file mismatch?"),	1298	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
1160	p->id);	1299	p->id);
…		…
1166	send_reset (rsi);	1305	send_reset (rsi);
1167	break;	1306	break;
1168	}	1307	}
1169	}	1308	}
1170		1309
		1310	inline void
1171	void connection::keepalive_cb (ev::timer &w, int revents)	1311	connection::keepalive_cb (ev::timer &w, int revents)
1172	{	1312	{
1173	if (ev::ev_now () >= last_activity + ::conf.keepalive + 30)	1313	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1314
		1315	if (when >= 0)
		1316	w.start (when);
		1317	else if (when < -15)
1174	{	1318	{
1175	reset_connection ();	1319	reset_connection ();
1176	establish_connection ();	1320	establish_connection ();
1177	}	1321	}
1178	else if (ev::ev_now () < last_activity + ::conf.keepalive)
1179	w.start (last_activity + ::conf.keepalive - ev::now ());
1180	else if (conf->connectmode != conf_node::C_ONDEMAND	1322	else if (conf->connectmode != conf_node::C_ONDEMAND
1181	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1323	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1182	{	1324	{
		1325	w.start (3);
1183	send_ping (si);	1326	send_ping (si);
1184	w.start (5);
1185	}	1327	}
1186	else if (ev::ev_now () < last_activity + ::conf.keepalive + 10)	1328	else if (when >= -10)
1187	// hold ondemand connections implicitly a few seconds longer	1329	// hold ondemand connections implicitly a few seconds longer
1188	// should delete octx, though, or something like that ;)	1330	// should delete octx, though, or something like that ;)
1189	w.start (last_activity + ::conf.keepalive + 10 - ev::now ());	1331	w.start (when + 10);
1190	else	1332	else
1191	reset_connection ();	1333	reset_connection ();
1192	}	1334	}
1193		1335
		1336	void
1194	void connection::send_connect_request (int id)	1337	connection::send_connect_request (int id)
1195	{	1338	{
1196	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1339	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1197		1340
1198	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1341	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1342	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1343	THISNODE->protocols);
1199	p->hmac_set (octx);	1344	p->hmac_set (octx);
1200	send_vpn_packet (p, si);	1345	send_vpn_packet (p, si);
1201		1346
1202	delete p;	1347	delete p;
1203	}	1348	}
1204		1349
		1350	void
1205	void connection::script_init_env (const char *ext)	1351	connection::script_init_env (const char *ext)
1206	{	1352	{
1207	char *env;	1353	char *env;
1208	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);	1354	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1209	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);	1355	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1210	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,	1356	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1211	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,	1357	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1212	conf->id & 0xff); putenv (env);	1358	conf->id & 0xff); putenv (env);
1213	}	1359	}
1214		1360
		1361	void
1215	void connection::script_init_connect_env ()	1362	connection::script_init_connect_env ()
1216	{	1363	{
1217	vpn->script_init_env ();	1364	vpn->script_init_env ();
1218		1365
1219	char *env;	1366	char *env;
1220	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1367	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1368	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1221	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1369	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1222	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1370	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1223	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1371	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1224	}	1372	}
1225		1373
		1374	inline const char *
1226	const char *connection::script_node_up ()	1375	connection::script_node_up ()
1227	{	1376	{
1228	script_init_connect_env ();	1377	script_init_connect_env ();
1229		1378
1230	putenv ((char *)"STATE=up");	1379	putenv ((char *)"STATE=up");
1231		1380
…		…
1236	::conf.script_node_up ? ::conf.script_node_up : "node-up");	1385	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1237		1386
1238	return filename;	1387	return filename;
1239	}	1388	}
1240		1389
		1390	inline const char *
		1391	connection::script_node_change ()
		1392	{
		1393	script_init_connect_env ();
		1394
		1395	putenv ((char *)"STATE=change");
		1396
		1397	char *filename;
		1398	asprintf (&filename,
		1399	"%s/%s",
		1400	confbase,
		1401	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1402
		1403	return filename;
		1404	}
		1405
		1406	inline const char *
1241	const char *connection::script_node_down ()	1407	connection::script_node_down ()
1242	{	1408	{
1243	script_init_connect_env ();	1409	script_init_connect_env ();
1244		1410
1245	putenv ((char *)"STATE=down");	1411	putenv ((char *)"STATE=down");
1246		1412
…		…
1252		1418
1253	return filename;	1419	return filename;
1254	}	1420	}
1255		1421
1256	connection::connection (struct vpn vpn, conf_node conf)	1422	connection::connection (struct vpn vpn, conf_node conf)
1257	: vpn(vpn), conf(conf)	1423	: vpn(vpn), conf(conf),
1258	, rekey (this, &connection::rekey_cb)
1259	, keepalive (this, &connection::keepalive_cb)
1260	, establish_connection (this, &connection::establish_connection_cb)
1261	#if ENABLE_DNS	1424	#if ENABLE_DNS
1262	, dns (0)	1425	dns (0),
1263	#endif	1426	#endif
		1427	data_queue(conf->max_ttl, conf->max_queue + 1),
		1428	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1264	{	1429	{
		1430	rekey .set<connection, &connection::rekey_cb > (this);
		1431	keepalive .set<connection, &connection::keepalive_cb > (this);
		1432	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1433
		1434	last_establish_attempt = 0.;
1265	octx = ictx = 0;	1435	octx = ictx = 0;
1266	retry_cnt = 0;
1267		1436
1268	if (!conf->protocols) // make sure some protocol is enabled	1437	connectmode = conf->connectmode;
1269	conf->protocols = PROT_UDPv4;
1270		1438
1271	connectmode = conf_node::C_ALWAYS; // initial setting	1439	// queue a dummy packet to force an initial connection attempt
		1440	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1441	vpn_queue.put (new net_packet);
		1442
1272	reset_connection ();	1443	reset_connection ();
1273	}	1444	}
1274		1445
1275	connection::~connection ()	1446	connection::~connection ()
1276	{	1447	{
1277	shutdown ();	1448	shutdown ();
1278	}	1449	}
1279		1450
		1451	void
1280	void connection_init ()	1452	connection_init ()
1281	{	1453	{
1282	auth_rate_limiter.clear ();	1454	auth_rate_limiter.clear ();
1283	reset_rate_limiter.clear ();	1455	reset_rate_limiter.clear ();
1284	}	1456	}
1285		1457

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Comparing gvpe/src/connection.C (file contents): Revision 1.61 by pcg, Sat Nov 10 19:43:37 2007 UTC vs. Revision 1.107 by root, Fri Sep 20 11:57:03 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.61 by pcg, Sat Nov 10 19:43:37 2007 UTC vs.
Revision 1.107 by root, Fri Sep 20 11:57:03 2013 UTC