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

Comparing gvpe/src/connection.C (file contents):
Revision 1.49 by pcg, Sat Mar 12 18:10:40 2005 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. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <cassert>
25
26	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
27		37
		38	#include <openssl/opensslv.h>
28	#include <openssl/rand.h>	39	#include <openssl/rand.h>
29	#include <openssl/evp.h>	40	#include <openssl/evp.h>
30	#include <openssl/rsa.h>	41	#include <openssl/rsa.h>
31	#include <openssl/err.h>	42	#include <openssl/err.h>
32		43
33	#include "gettext.h"	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
34		50
35	#include "conf.h"	51	#include "conf.h"
36	#include "slog.h"	52	#include "slog.h"
37	#include "device.h"	53	#include "device.h"
38	#include "vpn.h"	54	#include "vpn.h"
39	#include "connection.h"	55	#include "connection.h"
		56	#include "hkdf.h"
40		57
41	#include "netcompat.h"	58	#include "netcompat.h"
42		59
43	#if !HAVE_RAND_PSEUDO_BYTES
44	# define RAND_pseudo_bytes RAND_bytes
45	#endif
46
47	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	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
48		62
49	#define ULTRA_FAST 1	63	#define ULTRA_FAST 1
50	#define HLOG 15	64	#define HLOG 15
51	#include "lzf/lzf.h"	65	#include "lzf/lzf.h"
52	#include "lzf/lzf_c.c"	66	#include "lzf/lzf_c.c"
53	#include "lzf/lzf_d.c"	67	#include "lzf/lzf_d.c"
54		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
55	struct crypto_ctx	113	struct crypto_ctx
56	{	114	{
57	EVP_CIPHER_CTX cctx;	115	EVP_CIPHER_CTX cctx;
58	HMAC_CTX hctx;	116	HMAC_CTX hctx;
59		117
60	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);
61	~crypto_ctx ();	119	~crypto_ctx ();
62	};	120	};
63		121
64	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)
65	{	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
66	EVP_CIPHER_CTX_init (&cctx);	152	EVP_CIPHER_CTX_init (&cctx);
67	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));
68	HMAC_CTX_init (&hctx);	154	}
69	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
70	}	155	}
71		156
72	crypto_ctx::~crypto_ctx ()	157	crypto_ctx::~crypto_ctx ()
73	{	158	{
74	require (EVP_CIPHER_CTX_cleanup (&cctx));	159	require (EVP_CIPHER_CTX_cleanup (&cctx));
75	HMAC_CTX_cleanup (&hctx);	160	HMAC_CTX_cleanup (&hctx);
76	}	161	}
77		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
78	static void	190	static void
79	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	191	auth_hash (const auth_data &auth, const ecdh_key &b, auth_mac &mac)
80	{	192	{
81	EVP_MD_CTX ctx;	193	hkdf kdf (b, sizeof b, AUTH_DIGEST ()); // use response ecdh b as salt
82		194	kdf.extract (&auth.rsa, sizeof (auth.rsa));
83	EVP_MD_CTX_init (&ctx);	195	kdf.extract_done ();
84	require (EVP_DigestInit (&ctx, RSA_HASH));	196	kdf.expand (mac, sizeof mac, auth.ecdh, sizeof (auth.ecdh)); // use challenge ecdh b as info
85	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));
86	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
87	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
88	EVP_MD_CTX_cleanup (&ctx);
89	}	197	}
90		198
91	struct rsa_entry {	199	void
92	tstamp expire;	200	connection::generate_auth_data ()
93	rsaid id;
94	rsachallenge chg;
95	};
96
97	struct rsa_cache : list<rsa_entry>
98	{	201	{
99	void cleaner_cb (time_watcher &w); time_watcher cleaner;	202	if (auth_expire < ev_now ())
100
101	bool find (const rsaid &id, rsachallenge &chg)
102	{
103	for (iterator i = begin (); i != end (); ++i)
104	{
105	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)
106	{
107	memcpy (&chg, &i->chg, sizeof chg);
108
109	erase (i);
110	return true;
111	}
112	}
113
114	if (cleaner.at < NOW)
115	cleaner.start (NOW + RSA_TTL);
116
117	return false;
118	}
119
120	void gen (rsaid &id, rsachallenge &chg)
121	{
122	rsa_entry e;
123
124	RAND_bytes ((unsigned char *)&id, sizeof id);
125	RAND_bytes ((unsigned char *)&chg, sizeof chg);
126
127	e.expire = NOW + RSA_TTL;
128	e.id = id;
129	memcpy (&e.chg, &chg, sizeof chg);
130
131	push_back (e);
132
133	if (cleaner.at < NOW)
134	cleaner.start (NOW + RSA_TTL);
135	}
136
137	rsa_cache ()
138	: cleaner (this, &rsa_cache::cleaner_cb)
139	{ }	203	{
		204	// request data
		205	rand_fill (snd_auth.rsa);
		206	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
140		207
141	} rsa_cache;	208	// eventual response data
142		209	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
143	void rsa_cache::cleaner_cb (time_watcher &w)
144	{
145	if (!empty ())
146	{	210	}
147	w.start (NOW + RSA_TTL);
148		211
149	for (iterator i = begin (); i != end (); )	212	// every use prolongs the expiry
150	if (i->expire <= NOW)	213	auth_expire = ev_now () + AUTH_TTL;
151	i = erase (i);
152	else
153	++i;
154	}
155	}	214	}
156		215
157	//////////////////////////////////////////////////////////////////////////////	216	//////////////////////////////////////////////////////////////////////////////
158		217
159	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)
160	{	220	{
161	if (queue[i])	221	queue = new pkt [max_queue];
162	{
163	delete queue[i];
164	j = (j + 1) % QUEUEDEPTH;
165	}
166		222
167	queue[i] = p;
168
169	i = (i + 1) % QUEUEDEPTH;
170	}
171
172	net_packet *pkt_queue::get ()
173	{
174	net_packet *p = queue[j];
175
176	if (p)
177	{
178	queue[j] = 0;
179	j = (j + 1) % QUEUEDEPTH;
180	}
181
182	return p;
183	}
184
185	pkt_queue::pkt_queue ()
186	{
187	memset (queue, 0, sizeof (queue));
188	i = 0;	223	i = 0;
189	j = 0;	224	j = 0;
		225
		226	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
190	}	227	}
191		228
192	pkt_queue::~pkt_queue ()	229	pkt_queue::~pkt_queue ()
193	{	230	{
194	for (i = QUEUEDEPTH; --i > 0; )	231	while (net_packet *p = get ())
		232	delete p;
		233
195	delete queue[i];	234	delete [] queue;
196	}	235	}
197		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
198	struct net_rateinfo {	293	struct net_rateinfo
		294	{
199	u32 host;	295	u32 host;
200	double pcnt, diff;	296	double pcnt, diff;
201	tstamp last;	297	tstamp last;
202	};	298	};
203		299
213		309
214	bool can (const sockinfo &si) { return can((u32)si.host); }	310	bool can (const sockinfo &si) { return can((u32)si.host); }
215	bool can (u32 host);	311	bool can (u32 host);
216	};	312	};
217		313
218	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	314	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
219		315
		316	bool
220	bool net_rate_limiter::can (u32 host)	317	net_rate_limiter::can (u32 host)
221	{	318	{
222	iterator i;	319	iterator i;
223		320
224	for (i = begin (); i != end (); )	321	for (i = begin (); i != end (); )
225	if (i->host == host)	322	if (i->host == host)
226	break;	323	break;
227	else if (i->last < NOW - NRL_EXPIRE)	324	else if (i->last < ev_now () - NRL_EXPIRE)
228	i = erase (i);	325	i = erase (i);
229	else	326	else
230	i++;	327	i++;
231		328
232	if (i == end ())	329	if (i == end ())
…		…
234	net_rateinfo ri;	331	net_rateinfo ri;
235		332
236	ri.host = host;	333	ri.host = host;
237	ri.pcnt = 1.;	334	ri.pcnt = 1.;
238	ri.diff = NRL_MAXDIF;	335	ri.diff = NRL_MAXDIF;
239	ri.last = NOW;	336	ri.last = ev_now ();
240		337
241	push_front (ri);	338	push_front (ri);
242		339
243	return true;	340	return true;
244	}	341	}
…		…
246	{	343	{
247	net_rateinfo ri (*i);	344	net_rateinfo ri (*i);
248	erase (i);	345	erase (i);
249		346
250	ri.pcnt = ri.pcnt * NRL_ALPHA;	347	ri.pcnt = ri.pcnt * NRL_ALPHA;
251	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	348	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
252		349
253	ri.last = NOW;	350	ri.last = ev_now ();
254		351
255	double dif = ri.diff / ri.pcnt;	352	double dif = ri.diff / ri.pcnt;
256		353
257	bool send = dif > NRL_CUTOFF;	354	bool send = dif > NRL_CUTOFF;
258		355
…		…
270	}	367	}
271	}	368	}
272		369
273	/////////////////////////////////////////////////////////////////////////////	370	/////////////////////////////////////////////////////////////////////////////
274		371
275	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	372	void
276
277	void hmac_packet::hmac_gen (crypto_ctx *ctx)	373	hmac_packet::hmac_gen (crypto_ctx ctx, u8 hmac_digest)
278	{	374	{
279	unsigned int xlen;
280
281	HMAC_CTX *hctx = &ctx->hctx;	375	HMAC_CTX *hctx = &ctx->hctx;
282		376
283	HMAC_Init_ex (hctx, 0, 0, 0, 0);	377	require101 (HMAC_Init_ex (hctx, 0, 0, 0, 0));
284	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	378	require101 (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), len - sizeof (hmac_packet)));
285	len - sizeof (hmac_packet));	379	require101 (HMAC_Final (hctx, hmac_digest, 0));
286	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);
287	}	380	}
288		381
289	void	382	void
290	hmac_packet::hmac_set (crypto_ctx *ctx)	383	hmac_packet::hmac_set (crypto_ctx *ctx)
291	{	384	{
292	hmac_gen (ctx);	385	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
293		386	hmac_gen (ctx, hmac_digest);
294	memcpy (hmac, hmac_digest, HMACLENGTH);	387	memcpy (hmac, hmac_digest, HMACLENGTH);
295	}	388	}
296		389
297	bool	390	bool
298	hmac_packet::hmac_chk (crypto_ctx *ctx)	391	hmac_packet::hmac_chk (crypto_ctx *ctx)
299	{	392	{
300	hmac_gen (ctx);	393	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
301		394	hmac_gen (ctx, hmac_digest);
302	return !memcmp (hmac, hmac_digest, HMACLENGTH);	395	return !memcmp (hmac, hmac_digest, HMACLENGTH);
303	}	396	}
304		397
		398	void
305	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	399	vpn_packet::set_hdr (ptype type_, unsigned int dst)
306	{	400	{
307	type = type_;	401	type = type_;
308		402
309	int src = THISNODE->id;	403	int src = THISNODE->id;
310		404
…		…
315		409
316	#define MAXVPNDATA (MAX_MTU - 6 - 6)	410	#define MAXVPNDATA (MAX_MTU - 6 - 6)
317	#define DATAHDR (sizeof (u32) + RAND_SIZE)	411	#define DATAHDR (sizeof (u32) + RAND_SIZE)
318		412
319	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
320	{	422	{
321	u8 data[MAXVPNDATA + DATAHDR]; // seqno
322
323	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
324	tap_packet unpack (connection conn, u32 &seqno);
325	private:
326
327	const u32 data_hdr_size () const
328	{
329	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	423	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
330	}
331	};	424	}
		425	};
332		426
333	void	427	void
334	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)
335	{	429	{
336	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	430	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
338	ptype type = PT_DATA_UNCOMPRESSED;	432	ptype type = PT_DATA_UNCOMPRESSED;
339		433
340	#if ENABLE_COMPRESSION	434	#if ENABLE_COMPRESSION
341	u8 cdata[MAX_MTU];	435	u8 cdata[MAX_MTU];
342		436
343	if (conn->features & ENABLE_COMPRESSION)	437	if (conn->features & FEATURE_COMPRESSION)
344	{	438	{
345	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	439	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
346		440
347	if (cl)	441	if (cl)
348	{	442	{
…		…
354	d[1] = cl;	448	d[1] = cl;
355	}	449	}
356	}	450	}
357	#endif	451	#endif
358		452
359	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	453	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
360		454
361	struct {	455	struct {
362	#if RAND_SIZE	456	#if RAND_SIZE
363	u8 rnd[RAND_SIZE];	457	u8 rnd[RAND_SIZE];
364	#endif	458	#endif
365	u32 seqno;	459	u32 seqno;
366	} datahdr;	460	} datahdr;
367		461
368	datahdr.seqno = ntohl (seqno);	462	datahdr.seqno = ntohl (seqno);
369	#if RAND_SIZE	463	#if RAND_SIZE
370	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);
371	#endif	467	#endif
372		468
373	require (EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
374	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
375	(unsigned char *) &datahdr, DATAHDR));	471	(unsigned char *) &datahdr, DATAHDR));
…		…
397	int outl = 0, outl2;	493	int outl = 0, outl2;
398	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
399	u8 *d;	495	u8 *d;
400	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
401		497
402	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
403		499
404	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
405	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
406		502
407	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
408	d = cdata;	504	d = cdata;
409	else	505	else
410	#endif	506	#endif
411	d = &(*p)[6 + 6 - DATAHDR];	507	d = &(*p)[6 + 6] - DATAHDR;
412		508
413	/* 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
414	require (EVP_DecryptUpdate (cctx,	516	require (EVP_DecryptUpdate (cctx,
415	d, &outl2,	517	d, &outl2,
416	(unsigned char *)&data, len - data_hdr_size ()));	518	(unsigned char *)&data, len - data_hdr_size ()));
417	outl += outl2;	519	outl += outl2;
418		520
…		…
449	}	551	}
450	};	552	};
451		553
452	struct config_packet : vpn_packet	554	struct config_packet : vpn_packet
453	{	555	{
454	// actually, hmaclen cannot be checked because the hmac	556	u8 serial[SERIAL_SIZE];
455	// field comes before this data, so peers with other
456	// hmacs simply will not work.
457	u8 prot_major, prot_minor, randsize, hmaclen;	557	u8 prot_major, prot_minor, randsize;
458	u8 flags, challengelen, features, pad3;	558	u8 flags, features, pad6, pad7, pad8;
459	u32 cipher_nid, digest_nid, hmac_nid;	559	u32 cipher_nid, mac_nid, auth_nid;
460		560
461	void setup (ptype type, int dst);	561	void setup (ptype type, int dst);
462	bool chk_config () const;	562	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
463		563
464	static u8 get_features ()	564	static u8 get_features ()
465	{	565	{
466	u8 f = 0;	566	u8 f = 0;
467	#if ENABLE_COMPRESSION	567	#if ENABLE_COMPRESSION
468	f \|= FEATURE_COMPRESSION;	568	f \|= FEATURE_COMPRESSION;
469	#endif	569	#endif
470	#if ENABLE_ROHC	570	#if ENABLE_ROHC
471	f \|= FEATURE_ROHC;	571	f \|= FEATURE_ROHC;
472	#endif	572	#endif
		573	#if ENABLE_BRIDGING
		574	f \|= FEATURE_BRIDGING;
		575	#endif
473	return f;	576	return f;
474	}	577	}
475	};	578	};
476		579
		580	void
477	void config_packet::setup (ptype type, int dst)	581	config_packet::setup (ptype type, int dst)
478	{	582	{
479	prot_major = PROTOCOL_MAJOR;	583	prot_major = PROTOCOL_MAJOR;
480	prot_minor = PROTOCOL_MINOR;	584	prot_minor = PROTOCOL_MINOR;
481	randsize = RAND_SIZE;	585	randsize = RAND_SIZE;
482	hmaclen = HMACLENGTH;
483	flags = 0;	586	flags = 0;
484	challengelen = sizeof (rsachallenge);
485	features = get_features ();	587	features = get_features ();
486		588
		589	strncpy ((char *)serial, conf.serial, sizeof (serial));
		590
487	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	591	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
488	digest_nid = htonl (EVP_MD_type (RSA_HASH));
489	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 ()));
490		594
491	len = sizeof (*this) - sizeof (net_packet);	595	len = sizeof (*this) - sizeof (net_packet);
492	set_hdr (type, dst);	596	set_hdr (type, dst);
493	}	597	}
494		598
495	bool config_packet::chk_config () const	599	bool
		600	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
496	{	601	{
497	if (prot_major != PROTOCOL_MAJOR)	602	if (prot_major != PROTOCOL_MAJOR)
498	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);
499	else if (randsize != RAND_SIZE)	605	else if (randsize != RAND_SIZE)
500	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)"),
501	else if (hmaclen != HMACLENGTH)	607	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
502	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
503	else if (challengelen != sizeof (rsachallenge))
504	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
505	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	608	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
506	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)"),
507	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	610	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
508	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
509	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	611	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
510	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 ()));
511	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)
512	return true;	625	return true;
		626	}
513		627
514	return false;	628	return false;
515	}	629	}
516		630
517	struct auth_req_packet : config_packet	631	struct auth_req_packet : config_packet // UNPROTECTED
518	{	632	{
519	char magic[8];	633	char magic[8];
520	u8 initiate; // false if this is just an automatic reply	634	u8 initiate; // false if this is just an automatic reply
521	u8 protocols; // supported protocols (will be patched on forward)	635	u8 protocols; // supported protocols (will be patched on forward)
522	u8 pad2, pad3;	636	u8 pad2, pad3;
523	rsaid id;	637	auth_encr encr;
524	rsaencrdata encr;
525		638
526	auth_req_packet (int dst, bool initiate_, u8 protocols_)	639	auth_req_packet (int dst, bool initiate_, u8 protocols_)
527	{	640	{
528	config_packet::setup (PT_AUTH_REQ, dst);	641	config_packet::setup (PT_AUTH_REQ, dst);
529	strncpy (magic, MAGIC, 8);	642	memcpy (magic, MAGIC, 8);
530	initiate = !!initiate_;	643	initiate = !!initiate_;
531	protocols = protocols_;	644	protocols = protocols_;
532		645
533	len = sizeof (*this) - sizeof (net_packet);	646	len = sizeof (*this) - sizeof (net_packet);
534	}	647	}
535	};	648	};
536		649
537	struct auth_res_packet : config_packet	650	struct auth_res_packet : vpn_packet // UNPROTECTED
538	{	651	{
539	rsaid id;
540	u8 pad1, pad2, pad3;
541	u8 response_len; // encrypted length
542	rsaresponse response;	652	auth_response response;
543		653
544	auth_res_packet (int dst)	654	auth_res_packet (int dst)
545	{	655	{
546	config_packet::setup (PT_AUTH_RES, dst);	656	set_hdr (PT_AUTH_RES, dst);
547		657
548	len = sizeof (*this) - sizeof (net_packet);	658	len = sizeof (*this) - sizeof (net_packet);
549	}	659	}
550	};	660	};
551		661
…		…
581	};	691	};
582		692
583	/////////////////////////////////////////////////////////////////////////////	693	/////////////////////////////////////////////////////////////////////////////
584		694
585	void	695	void
586	connection::connection_established ()	696	connection::connection_established (const sockinfo &rsi)
587	{	697	{
		698	if (!have_snd_auth \|\| !have_rcv_auth)
		699	return;
		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
588	if (ictx && octx)	731	if (ictx && octx)
589	{	732	{
590	connectmode = conf->connectmode;	733	while (tap_packet p = (tap_packet )data_queue.get ())
591
592	// make sure rekeying timeouts are slightly asymmetric
593	rekey.start (NOW + ::conf.rekey
594	+ (conf->id > THISNODE->id ? 10 : 0));
595	keepalive.start (NOW + ::conf.keepalive);
596
597	// send queued packets
598	if (ictx && octx)
599	{	734	{
600	while (tap_packet p = (tap_packet )data_queue.get ())
601	{
602	send_data_packet (p);	735	if (p->len) send_data_packet (p);
603	delete p;	736	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	}	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	}
612	}	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 ());
613	else	754	else
614	{	755	{
615	retry_cnt = 0;	756	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
616	establish_connection.start (NOW + 5);	757	protocol = 0;
617	keepalive.stop ();
618	rekey.stop ();
619	}	758	}
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	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
631		759
632	si.set (conf, protocol);	760	si.set (conf, protocol);
		761
		762	is_direct = si.valid ();
633	}	763	}
634		764
635	// ensure sockinfo is valid, forward if necessary	765	// ensure sockinfo is valid, forward if necessary
636	const sockinfo &	766	const sockinfo &
637	connection::forward_si (const sockinfo &si) const	767	connection::forward_si (const sockinfo &si) const
638	{	768	{
639	if (!si.valid ())	769	if (!si.valid ())
640	{	770	{
641	connection *r = vpn->find_router ();	771	connection *r = vpn->find_router_for (this);
642		772
643	if (r)	773	if (r)
644	{	774	{
645	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."),
646	conf->nodename, r->conf->nodename, (const char *)r->si);	776	conf->nodename, r->conf->nodename);
647	return r->si;	777	return r->si;
648	}	778	}
649	else	779	else
650	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	780	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
651	conf->nodename);	781	conf->nodename);
652	}	782	}
653		783
654	return si;	784	return si;
655	}	785	}
…		…
665	connection::send_ping (const sockinfo &si, u8 pong)	795	connection::send_ping (const sockinfo &si, u8 pong)
666	{	796	{
667	ping_packet *pkt = new ping_packet;	797	ping_packet *pkt = new ping_packet;
668		798
669	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);
670	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	802	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
671		803
672	delete pkt;	804	delete pkt;
673	}	805	}
674		806
…		…
689	void	821	void
690	connection::send_auth_request (const sockinfo &si, bool initiate)	822	connection::send_auth_request (const sockinfo &si, bool initiate)
691	{	823	{
692	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);
693		825
694	rsachallenge chg;	826	generate_auth_data ();
695	rsa_cache.gen (pkt->id, chg);
696	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	827	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
697		828
698	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);
699
700	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
701		831
702	delete pkt;	832	delete pkt;
703	}	833	}
704		834
705	void	835	void
706	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	836	connection::send_auth_response (const sockinfo &si)
707	{	837	{
708	auth_res_packet *pkt = new auth_res_packet (conf->id);	838	auth_res_packet *pkt = new auth_res_packet (conf->id);
709		839
710	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);
711		842
712	rsa_hash (id, chg, pkt->response);
713
714	pkt->hmac_set (octx);
715
716	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);
717
718	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
719		845
720	delete pkt;	846	delete pkt;
721	}	847	}
722		848
723	void	849	void
724	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	850	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
725	{	851	{
726	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	852	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
727	conf->id, rid, (const char *)rsi);	853	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		854	conf->protocols);
728		855
729	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);
730		857
731	r->hmac_set (octx);	858	r->hmac_set (octx);
732	send_vpn_packet (r, si);	859	send_vpn_packet (r, si);
733		860
734	delete r;	861	delete r;
735	}	862	}
736		863
737	void	864	inline void
738	connection::establish_connection_cb (time_watcher &w)	865	connection::establish_connection_cb (ev::timer &w, int revents)
739	{	866	{
740	if (!ictx	867	if (!(ictx && octx)
741	&& conf != THISNODE	868	&& conf != THISNODE
742	&& connectmode != conf_node::C_NEVER	869	&& connectmode != conf_node::C_NEVER
743	&& connectmode != conf_node::C_DISABLED	870	&& connectmode != conf_node::C_DISABLED
744	&& NOW > w.at)	871	&& !w.is_active ())
745	{	872	{
746	w.at = TSTAMP_MAX; // first disable this watcher in case of recursion	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	}
747		880
748	double retry_int = double (retry_cnt & 3	881	last_establish_attempt = ev_now ();
		882
		883	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
749	? (retry_cnt & 3) + 1	884	? (retry_cnt & 3) + 1
750	: 1 << (retry_cnt >> 2));	885	: 1 << (retry_cnt >> 2));
751		886
752	reset_si ();	887	reset_si ();
753		888
754	bool slow = si.prot & PROT_SLOW;	889	bool slow = si.prot & PROT_SLOW;
755		890
756	if (si.prot && !si.host)	891	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		892	{
		893	/TODO/ /* start the timer so we don't recurse endlessly */
		894	w.start (1);
757	vpn->send_connect_request (conf->id);	895	vpn->send_connect_request (this);
		896	}
758	else	897	else
759	{	898	{
		899	if (si.valid ())
		900	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		901	conf->nodename, (const char *)si);
		902
760	const sockinfo &dsi = forward_si (si);	903	const sockinfo &dsi = forward_si (si);
761		904
762	slow = slow \|\| (dsi.prot & PROT_SLOW);	905	slow = slow \|\| (dsi.prot & PROT_SLOW);
763		906
764	if (dsi.valid () && auth_rate_limiter.can (dsi))	907	if (dsi.valid () && auth_rate_limiter.can (dsi))
…		…
768	else	911	else
769	send_ping (dsi, 0);	912	send_ping (dsi, 0);
770	}	913	}
771	}	914	}
772		915
773	retry_int *= slow ? 8. : 0.7;	916	retry_int *= slow ? 8. : 0.9;
774		917
775	if (retry_int < conf->max_retry)	918	if (retry_int < conf->max_retry)
776	retry_cnt++;	919	retry_cnt++;
777	else	920	else
778	retry_int = conf->max_retry;	921	retry_int = conf->max_retry;
779		922
780	w.start (NOW + retry_int);	923	w.start (retry_int);
781	}	924	}
782	}	925	}
783		926
784	void	927	void
785	connection::reset_connection ()	928	connection::reset_connection ()
…		…
788	{	931	{
789	slog (L_INFO, _("%s(%s): connection lost"),	932	slog (L_INFO, _("%s(%s): connection lost"),
790	conf->nodename, (const char *)si);	933	conf->nodename, (const char *)si);
791		934
792	if (::conf.script_node_down)	935	if (::conf.script_node_down)
793	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);
		939	run_script_queued (cb, _("node-down command execution failed, continuing."));
		940	}
794	}	941	}
795		942
796	delete ictx; ictx = 0;	943	delete ictx; ictx = 0;
797	delete octx; octx = 0;	944	delete octx; octx = 0;
798	#if ENABLE_DNS
799	dnsv4_reset_connection ();
800	#endif
801		945
802	si.host = 0;	946	si.host = 0;
803		947
		948	have_snd_auth = false;
		949	have_rcv_auth = false;
		950	auth_expire = 0.;
		951
804	last_activity = 0;	952	last_activity = 0.;
		953	//last_si_change = 0.;
805	retry_cnt = 0;	954	retry_cnt = 0;
806		955
807	rekey.stop ();	956	rekey.stop ();
808	keepalive.stop ();	957	keepalive.stop ();
809	establish_connection.stop ();	958	establish_connection.stop ();
…		…
816	send_reset (si);	965	send_reset (si);
817		966
818	reset_connection ();	967	reset_connection ();
819	}	968	}
820		969
821	void	970	// poor-man's rekeying
822	connection::rekey_cb (time_watcher &w)	971	inline void
		972	connection::rekey_cb (ev::timer &w, int revents)
823	{	973	{
824	reset_connection ();	974	reset_connection ();
825	establish_connection ();	975	establish_connection ();
826	}	976	}
827		977
…		…
843	if (oseqno > MAX_SEQNO)	993	if (oseqno > MAX_SEQNO)
844	rekey ();	994	rekey ();
845	}	995	}
846		996
847	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
848	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1008	connection::inject_data_packet (tap_packet *pkt)
849	{	1009	{
850	if (ictx && octx)	1010	if (ictx && octx)
851	send_data_packet (pkt);	1011	send_data_packet (pkt);
852	else	1012	else
853	{	1013	{
854	if (!broadcast)//DDDD
855	data_queue.put (new tap_packet (*pkt));	1014	data_queue.put (new tap_packet (*pkt));
856		1015	post_inject_queue ();
857	establish_connection ();
858	}	1016	}
859	}	1017	}
860		1018
		1019	void
861	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1020	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
862	{	1021	{
863	if (ictx && octx)	1022	if (ictx && octx)
864	send_vpn_packet (pkt, si, tos);	1023	send_vpn_packet (pkt, si, tos);
865	else	1024	else
866	{	1025	{
867	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1026	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
868		1027	post_inject_queue ();
869	establish_connection ();
870	}	1028	}
871	}	1029	}
872		1030
873	void	1031	void
874	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1032	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
875	{	1033	{
876	last_activity = NOW;	1034	last_activity = ev_now ();
877		1035
878	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.",
879	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1037	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1038
		1039	if (connectmode == conf_node::C_DISABLED)
		1040	return;
880		1041
881	switch (pkt->typ ())	1042	switch (pkt->typ ())
882	{	1043	{
883	case vpn_packet::PT_PING:	1044	case vpn_packet::PT_PING:
		1045	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1046
884	// we send pings instead of auth packets after some retries,	1047	// we send pings instead of auth packets after some retries,
885	// so reset the retry counter and establish a connection	1048	// so reset the retry counter and establish a connection
886	// when we receive a ping.	1049	// when we receive a ping.
887	if (!ictx)	1050	if (!ictx)
888	{	1051	{
889	if (auth_rate_limiter.can (rsi))	1052	if (auth_rate_limiter.can (rsi))
890	send_auth_request (rsi, true);	1053	send_auth_request (rsi, true);
891	}	1054	}
892	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.
893	send_ping (rsi, 1); // pong	1058	send_ping (rsi, 1); // pong
894		1059
895	break;	1060	break;
896		1061
897	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 ();
898	break;	1068	break;
899		1069
900	case vpn_packet::PT_RESET:	1070	case vpn_packet::PT_RESET:
901	{	1071	{
902	reset_connection ();	1072	reset_connection ();
903		1073
904	config_packet p = (config_packet ) pkt;	1074	config_packet p = (config_packet ) pkt;
905		1075
906	if (!p->chk_config ())	1076	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
907	{
908	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
909	conf->nodename, (const char *)rsi);
910	connectmode = conf_node::C_DISABLED;
911	}
912	else if (connectmode == conf_node::C_ALWAYS)
913	establish_connection ();	1077	establish_connection ();
914	}	1078	}
915	break;	1079	break;
916		1080
917	case vpn_packet::PT_AUTH_REQ:	1081	case vpn_packet::PT_AUTH_REQ:
918	if (auth_rate_limiter.can (rsi))	1082	if (auth_rate_limiter.can (rsi))
919	{	1083	{
920	auth_req_packet p = (auth_req_packet ) pkt;	1084	auth_req_packet p = (auth_req_packet )pkt;
921		1085
922	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);
923		1089
924	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))
925	{	1096	{
926	if (p->prot_minor != PROTOCOL_MINOR)	1097	if (p->prot_minor != PROTOCOL_MINOR)
927	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."),
928	conf->nodename, (const char *)rsi,	1099	conf->nodename, (const char *)rsi,
929	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1100	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
930		1101
931	if (p->initiate)	1102	if (p->initiate)
932	send_auth_request (rsi, false);	1103	send_auth_request (rsi, false);
933		1104
934	rsachallenge k;	1105	auth_data auth;
935		1106
936	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1107	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
937	{	1108	{
938	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?"),
939	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));
940	break;
941	}	1111	}
942	else	1112	else
943	{	1113	{
944	delete octx;	1114	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
945		1115
946	octx = new crypto_ctx (k, 1);	1116	rcv_auth = auth;
947	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1117	have_rcv_auth = true;
948		1118
		1119	send_auth_response (rsi);
		1120
		1121	if (chg)
		1122	{
949	conf->protocols = p->protocols;	1123	conf->protocols = p->protocols;
950	features = p->features & config_packet::get_features ();	1124	features = p->features & config_packet::get_features ();
951		1125
952	send_auth_response (rsi, p->id, k);
953
954	connection_established ();	1126	connection_established (rsi);
955
956	break;	1127	}
957	}	1128	}
		1129
		1130	break;
958	}	1131	}
959	else
960	slog (L_WARN, _("%s(%s): protocol mismatch"),
961	conf->nodename, (const char *)rsi);
962		1132
963	send_reset (rsi);	1133	send_reset (rsi);
964	}	1134	}
965		1135
966	break;	1136	break;
967		1137
968	case vpn_packet::PT_AUTH_RES:	1138	case vpn_packet::PT_AUTH_RES:
969	{	1139	{
970	auth_res_packet p = (auth_res_packet ) pkt;	1140	auth_res_packet p = (auth_res_packet )pkt;
971		1141
972	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1142	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
973		1143
974	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))
975	{	1148	{
976	if (p->prot_minor != PROTOCOL_MINOR)
977	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
978	conf->nodename, (const char *)rsi,
979	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
980
981	rsachallenge chg;
982
983	if (!rsa_cache.find (p->id, chg))
984	{
985	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1149	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
986	conf->nodename, (const char *)rsi);	1150	conf->nodename, (const char *)rsi);
987	break;
988	}	1151	}
989	else	1152	else if (!have_snd_auth)
990	{	1153	{
991	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1154	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
992		1155
993	if (!p->hmac_chk (cctx))	1156	have_snd_auth = true;
994	{
995	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
996	"could be an attack, or just corruption or a synchronization error"),
997	conf->nodename, (const char *)rsi);
998	break;
999	}
1000	else
1001	{
1002	rsaresponse h;
1003
1004	rsa_hash (p->id, chg, h);
1005
1006	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1007	{
1008	prot_minor = p->prot_minor;
1009
1010	delete ictx; ictx = cctx;
1011
1012	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1013
1014	si = rsi;
1015	protocol = rsi.prot;
1016
1017	connection_established ();	1157	connection_established (rsi);
1018
1019	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1020	conf->nodename, (const char *)rsi,
1021	p->prot_major, p->prot_minor);
1022
1023	if (::conf.script_node_up)
1024	run_script (run_script_cb (this, &connection::script_node_up), false);
1025
1026	break;
1027	}
1028	else
1029	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1030	conf->nodename, (const char *)rsi);
1031	}
1032
1033	delete cctx;
1034	}
1035	}	1158	}
1036	}	1159	}
1037
1038	send_reset (rsi);
1039	break;	1160	break;
1040		1161
1041	case vpn_packet::PT_DATA_COMPRESSED:	1162	case vpn_packet::PT_DATA_COMPRESSED:
1042	#if !ENABLE_COMPRESSION	1163	#if !ENABLE_COMPRESSION
1043	send_reset (rsi);	1164	send_reset (rsi);
…		…
1050	{	1171	{
1051	vpndata_packet p = (vpndata_packet )pkt;	1172	vpndata_packet p = (vpndata_packet )pkt;
1052		1173
1053	if (!p->hmac_chk (ictx))	1174	if (!p->hmac_chk (ictx))
1054	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"
1055	"could be an attack, or just corruption or a synchronization error"),	1176	"could be an attack, or just corruption or a synchronization error."),
1056	conf->nodename, (const char *)rsi);	1177	conf->nodename, (const char *)rsi);
1057	else	1178	else
1058	{	1179	{
1059	u32 seqno;	1180	u32 seqno;
1060	tap_packet *d = p->unpack (this, seqno);	1181	tap_packet *d = p->unpack (this, seqno);
		1182	int seqclass = iseqno.seqno_classify (seqno);
1061		1183
1062	if (iseqno.recv_ok (seqno))	1184	if (seqclass == 0) // ok
1063	{	1185	{
1064	vpn->tap->send (d);	1186	vpn->tap->send (d);
1065		1187
1066	if (si != rsi)	1188	if (si != rsi)
1067	{	1189	{
1068	// fast re-sync on connection 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.)
1069	si = rsi;	1192	// {
1070
1071	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1193	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1072	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);
1073	}	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);
1074	}	1222	}
1075		1223
1076	delete d;	1224	delete d;
1077	break;	1225	break;
1078	}	1226	}
…		…
1082	break;	1230	break;
1083		1231
1084	case vpn_packet::PT_CONNECT_REQ:	1232	case vpn_packet::PT_CONNECT_REQ:
1085	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1233	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1086	{	1234	{
1087	connect_req_packet p = (connect_req_packet ) pkt;	1235	connect_req_packet p = (connect_req_packet )pkt;
1088		1236
1089	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1237	if (p->id > 0 && p->id <= vpn->conns.size ())
1090	connection *c = vpn->conns[p->id - 1];
1091	conf->protocols = p->protocols;
1092
1093	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1094	conf->id, p->id, c->ictx && c->octx);
1095
1096	if (c->ictx && c->octx)
1097	{	1238	{
		1239	connection *c = vpn->conns[p->id - 1];
		1240	conf->protocols = p->protocols;
		1241
		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,
		1245	c->ictx && c->octx);
		1246
		1247	if (c->ictx && c->octx)
		1248	{
1098	// send connect_info packets to both sides, in case one is	1249	// send connect_info packets to both sides, in case one is
1099	// behind a nat firewall (or both ;)	1250	// behind a nat firewall (or both ;)
1100	c->send_connect_info (conf->id, si, conf->protocols);	1251	c->send_connect_info (conf->id, si, conf->protocols);
1101	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1252	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1253	}
		1254	else
		1255	c->establish_connection ();
1102	}	1256	}
1103	else	1257	else
1104	c->establish_connection ();	1258	slog (L_WARN,
		1259	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1260	p->id);
1105	}	1261	}
1106		1262
1107	break;	1263	break;
1108		1264
1109	case vpn_packet::PT_CONNECT_INFO:	1265	case vpn_packet::PT_CONNECT_INFO:
1110	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1266	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1111	{	1267	{
1112	connect_info_packet p = (connect_info_packet )pkt;	1268	connect_info_packet p = (connect_info_packet )pkt;
1113		1269
1114	if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything	1270	if (p->id > 0 && p->id <= vpn->conns.size ())
1115	{	1271	{
1116	connection *c = vpn->conns[p->id - 1];	1272	connection *c = vpn->conns[p->id - 1];
1117		1273
1118	c->conf->protocols = p->protocols;	1274	c->conf->protocols = p->protocols;
1119	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));
1120	p->si.upgrade_protocol (protocol, c->conf);	1276	p->si.upgrade_protocol (protocol, c->conf);
1121		1277
1122	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]",
1123	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);
1124		1286
1125	const sockinfo &dsi = forward_si (p->si);	1287	const sockinfo &dsi = forward_si (p->si);
1126		1288
1127	if (dsi.valid ())	1289	if (dsi.valid ())
1128	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);
1129	}	1295	}
		1296	else
		1297	slog (L_WARN,
		1298	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1299	p->id);
1130	}	1300	}
1131		1301
1132	break;	1302	break;
1133		1303
1134	default:	1304	default:
1135	send_reset (rsi);	1305	send_reset (rsi);
1136	break;	1306	break;
1137	}	1307	}
1138	}	1308	}
1139		1309
1140	void connection::keepalive_cb (time_watcher &w)	1310	inline void
		1311	connection::keepalive_cb (ev::timer &w, int revents)
1141	{	1312	{
1142	if (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)
1143	{	1318	{
1144	reset_connection ();	1319	reset_connection ();
1145	establish_connection ();	1320	establish_connection ();
1146	}	1321	}
1147	else if (NOW < last_activity + ::conf.keepalive)
1148	w.start (last_activity + ::conf.keepalive);
1149	else if (conf->connectmode != conf_node::C_ONDEMAND	1322	else if (conf->connectmode != conf_node::C_ONDEMAND
1150	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1323	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1151	{	1324	{
		1325	w.start (3);
1152	send_ping (si);	1326	send_ping (si);
1153	w.start (NOW + 5);
1154	}	1327	}
1155	else if (NOW < last_activity + ::conf.keepalive + 10)	1328	else if (when >= -10)
1156	// hold ondemand connections implicitly a few seconds longer	1329	// hold ondemand connections implicitly a few seconds longer
1157	// should delete octx, though, or something like that ;)	1330	// should delete octx, though, or something like that ;)
1158	w.start (last_activity + ::conf.keepalive + 10);	1331	w.start (when + 10);
1159	else	1332	else
1160	reset_connection ();	1333	reset_connection ();
1161	}	1334	}
1162		1335
		1336	void
1163	void connection::send_connect_request (int id)	1337	connection::send_connect_request (int id)
1164	{	1338	{
1165	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);
1166		1340
1167	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);
1168	p->hmac_set (octx);	1344	p->hmac_set (octx);
1169	send_vpn_packet (p, si);	1345	send_vpn_packet (p, si);
1170		1346
1171	delete p;	1347	delete p;
1172	}	1348	}
1173		1349
1174	void connection::script_node ()	1350	void
		1351	connection::script_init_env (const char *ext)
1175	{	1352	{
1176	vpn->script_if_up ();
1177
1178	char *env;	1353	char *env;
		1354	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1355	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1356	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1357	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1358	conf->id & 0xff); putenv (env);
		1359	}
		1360
		1361	void
		1362	connection::script_init_connect_env ()
		1363	{
		1364	vpn->script_init_env ();
		1365
		1366	char *env;
1179	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);
1180	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1369	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1181	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1370	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1182	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1371	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1183	}	1372	}
1184		1373
		1374	inline const char *
1185	const char *connection::script_node_up ()	1375	connection::script_node_up ()
1186	{	1376	{
1187	script_node ();	1377	script_init_connect_env ();
1188		1378
1189	putenv ("STATE=up");	1379	putenv ((char *)"STATE=up");
1190		1380
		1381	char *filename;
		1382	asprintf (&filename,
		1383	"%s/%s",
		1384	confbase,
1191	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1385	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1192	}
1193		1386
		1387	return filename;
		1388	}
		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 *
1194	const char *connection::script_node_down ()	1407	connection::script_node_down ()
1195	{	1408	{
1196	script_node ();	1409	script_init_connect_env ();
1197		1410
1198	putenv ("STATE=down");	1411	putenv ((char *)"STATE=down");
1199		1412
1200	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1413	char *filename;
		1414	asprintf (&filename,
		1415	"%s/%s",
		1416	confbase,
		1417	::conf.script_node_down ? ::conf.script_node_down : "node-down");
		1418
		1419	return filename;
1201	}	1420	}
1202		1421
1203	connection::connection (struct vpn vpn, conf_node conf)	1422	connection::connection (struct vpn vpn, conf_node conf)
1204	: vpn(vpn), conf(conf)	1423	: vpn(vpn), conf(conf),
1205	, rekey (this, &connection::rekey_cb)
1206	, keepalive (this, &connection::keepalive_cb)
1207	, establish_connection (this, &connection::establish_connection_cb)
1208	#if ENABLE_DNS	1424	#if ENABLE_DNS
1209	, dns (0)	1425	dns (0),
1210	#endif	1426	#endif
		1427	data_queue(conf->max_ttl, conf->max_queue + 1),
		1428	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1211	{	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.;
1212	octx = ictx = 0;	1435	octx = ictx = 0;
1213	retry_cnt = 0;
1214		1436
1215	if (!conf->protocols) // make sure some protocol is enabled	1437	connectmode = conf->connectmode;
1216	conf->protocols = PROT_UDPv4;
1217		1438
1218	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
1219	reset_connection ();	1443	reset_connection ();
1220	}	1444	}
1221		1445
1222	connection::~connection ()	1446	connection::~connection ()
1223	{	1447	{
1224	shutdown ();	1448	shutdown ();
1225	}	1449	}
1226		1450
		1451	void
1227	void connection_init ()	1452	connection_init ()
1228	{	1453	{
1229	auth_rate_limiter.clear ();	1454	auth_rate_limiter.clear ();
1230	reset_rate_limiter.clear ();	1455	reset_rate_limiter.clear ();
1231	}	1456	}
1232		1457

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Comparing gvpe/src/connection.C (file contents): Revision 1.49 by pcg, Sat Mar 12 18:10:40 2005 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 1.49 by pcg, Sat Mar 12 18:10:40 2005 UTC vs.
Revision 1.107 by root, Fri Sep 20 11:57:03 2013 UTC