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

Comparing gvpe/src/connection.C (file contents):
Revision 1.46 by pcg, Sat Mar 5 19:13:15 2005 UTC vs.
Revision 1.103 by root, Thu Jul 18 17:35:10 2013 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
5	This file is part of GVPE.	5	This file is part of GVPE.
6		6
7	GVPE is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
8	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
9	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
10	(at your option) any later version.	10	option) any later version.
11		11
12	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15	GNU General Public License for more details.	15	Public License for more details.
16		16
17	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
18	along with gvpe; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
19	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <cassert>
25
26	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
27		37
28	#include <openssl/rand.h>	38	#include <openssl/rand.h>
29	#include <openssl/evp.h>	39	#include <openssl/evp.h>
30	#include <openssl/rsa.h>	40	#include <openssl/rsa.h>
31	#include <openssl/err.h>	41	#include <openssl/err.h>
32
33	#include "gettext.h"
34		42
35	#include "conf.h"	43	#include "conf.h"
36	#include "slog.h"	44	#include "slog.h"
37	#include "device.h"	45	#include "device.h"
38	#include "vpn.h"	46	#include "vpn.h"
39	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
40		49
41	#include "netcompat.h"	50	#include "netcompat.h"
42		51
43	#if !HAVE_RAND_PSEUDO_BYTES
44	# define RAND_pseudo_bytes RAND_bytes
45	#endif
46
47	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	52	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
		53	#define MAGIC "HUHN\xbd\xc6\xdb\x82" // 8 bytes of magic//D
48		54
49	#define ULTRA_FAST 1	55	#define ULTRA_FAST 1
50	#define HLOG 15	56	#define HLOG 15
51	#include "lzf/lzf.h"	57	#include "lzf/lzf.h"
52	#include "lzf/lzf_c.c"	58	#include "lzf/lzf_c.c"
53	#include "lzf/lzf_d.c"	59	#include "lzf/lzf_d.c"
54		60
		61	//////////////////////////////////////////////////////////////////////////////
		62
		63	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		64	static ev::child rs_child_ev;
		65
		66	namespace
		67	{
		68	void // c++ requires external linkage here, apparently :(
		69	rs_child_cb (ev::child &w, int revents)
		70	{
		71	w.stop ();
		72
		73	if (rs_queue.empty ())
		74	return;
		75
		76	pid_t pid = run_script (*rs_queue.front ().first, false);
		77	if (pid)
		78	{
		79	w.set (pid);
		80	w.start ();
		81	}
		82	else
		83	slog (L_WARN, rs_queue.front ().second);
		84
		85	delete rs_queue.front ().first;
		86	rs_queue.pop ();
		87	}
		88	};
		89
		90	// despite the fancy name, this is quite a hack
		91	static void
		92	run_script_queued (run_script_cb cb, const char warnmsg)
		93	{
		94	rs_queue.push (std::make_pair (cb, warnmsg));
		95
		96	if (!rs_child_ev.is_active ())
		97	{
		98	rs_child_ev.set<rs_child_cb> ();
		99	rs_child_ev ();
		100	}
		101	}
		102
		103	//////////////////////////////////////////////////////////////////////////////
		104
55	struct crypto_ctx	105	struct crypto_ctx
56	{	106	{
57	EVP_CIPHER_CTX cctx;	107	EVP_CIPHER_CTX cctx;
58	HMAC_CTX hctx;	108	HMAC_CTX hctx;
59		109
60	crypto_ctx (const rsachallenge &challenge, int enc);	110	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
61	~crypto_ctx ();	111	~crypto_ctx ();
62	};	112	};
63		113
64	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	114	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
65	{	115	{
		116	ecdh_key s;
		117
		118	curve25519_combine (a, b, s);
		119
		120	{
		121	u8 mac_key[MAC_KEYSIZE];
		122	static const unsigned char mac_info[] = "gvpe mac key";
		123
		124	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		125	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		126	kdf.extract (s, sizeof (s));
		127	kdf.extract_done (HKDF_PRF_HASH ());
		128	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		129
		130	HMAC_CTX_init (&hctx);
		131	require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		132	}
		133
		134	{
		135	u8 cipher_key[CIPHER_KEYSIZE];
		136	static const unsigned char cipher_info[] = "gvpe cipher key";
		137
		138	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		139	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		140	kdf.extract (s, sizeof (s));
		141	kdf.extract_done (HKDF_PRF_HASH ());
		142	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		143
66	EVP_CIPHER_CTX_init (&cctx);	144	EVP_CIPHER_CTX_init (&cctx);
67	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	145	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
68	HMAC_CTX_init (&hctx);	146	}
69	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
70	}	147	}
71		148
72	crypto_ctx::~crypto_ctx ()	149	crypto_ctx::~crypto_ctx ()
73	{	150	{
74	require (EVP_CIPHER_CTX_cleanup (&cctx));	151	require (EVP_CIPHER_CTX_cleanup (&cctx));
75	HMAC_CTX_cleanup (&hctx);	152	HMAC_CTX_cleanup (&hctx);
76	}	153	}
77		154
		155	static inline void
		156	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		157	{
		158	if (RSA_public_encrypt (sizeof (auth.rsa),
		159	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		160	key, RSA_PKCS1_OAEP_PADDING) < 0)
		161	fatal ("RSA_public_encrypt error");
		162
		163	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		164	}
		165
		166	static inline bool
		167	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		168	{
		169	u8 rsa_decrypt[RSA_KEYLEN];
		170
		171	if (RSA_private_decrypt (sizeof (encr.rsa),
		172	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		173	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		174	return 0;
		175
		176	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		177	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		178
		179	return 1;
		180	}
		181
78	static void	182	static void
79	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	183	auth_hash (const auth_data &auth, auth_mac &mac)
80	{	184	{
81	EVP_MD_CTX ctx;	185	HMAC_CTX ctx;
82		186
83	EVP_MD_CTX_init (&ctx);	187	HMAC_CTX_init (&ctx);
84	require (EVP_DigestInit (&ctx, RSA_HASH));	188	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
85	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));	189	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
86	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
87	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	190	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
88	EVP_MD_CTX_cleanup (&ctx);	191	HMAC_CTX_cleanup (&ctx);
89	}	192	}
90		193
91	struct rsa_entry {	194	void
92	tstamp expire;	195	connection::generate_auth_data ()
93	rsaid id;
94	rsachallenge chg;
95	};
96
97	struct rsa_cache : list<rsa_entry>
98	{	196	{
99	void cleaner_cb (time_watcher &w); time_watcher cleaner;	197	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	{ }	198	{
		199	// request data
		200	rand_fill (snd_auth.rsa);
		201	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
		202	auth_hash (snd_auth, snd_auth_mac);
140		203
141	} rsa_cache;	204	// eventual response data
142		205	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
143	void rsa_cache::cleaner_cb (time_watcher &w)
144	{
145	if (!empty ())
146	{	206	}
147	w.start (NOW + RSA_TTL);
148		207
149	for (iterator i = begin (); i != end (); )	208	// every use prolongs the expiry
150	if (i->expire <= NOW)	209	auth_expire = ev_now () + AUTH_TTL;
151	i = erase (i);
152	else
153	++i;
154	}
155	}	210	}
156		211
157	//////////////////////////////////////////////////////////////////////////////	212	//////////////////////////////////////////////////////////////////////////////
158		213
159	void pkt_queue::put (net_packet *p)	214	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		215	: max_ttl (max_ttl), max_queue (max_queue)
160	{	216	{
161	if (queue[i])	217	queue = new pkt [max_queue];
162	{
163	delete queue[i];
164	j = (j + 1) % QUEUEDEPTH;
165	}
166		218
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;	219	i = 0;
189	j = 0;	220	j = 0;
		221
		222	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
190	}	223	}
191		224
192	pkt_queue::~pkt_queue ()	225	pkt_queue::~pkt_queue ()
193	{	226	{
194	for (i = QUEUEDEPTH; --i > 0; )	227	while (net_packet *p = get ())
		228	delete p;
		229
195	delete queue[i];	230	delete [] queue;
196	}	231	}
197		232
		233	void
		234	pkt_queue::expire_cb (ev::timer &w, int revents)
		235	{
		236	ev_tstamp expire = ev_now () - max_ttl;
		237
		238	for (;;)
		239	{
		240	if (empty ())
		241	break;
		242
		243	double diff = queue[j].tstamp - expire;
		244
		245	if (diff >= 0.)
		246	{
		247	w.start (diff > 0.5 ? diff : 0.5);
		248	break;
		249	}
		250
		251	delete get ();
		252	}
		253	}
		254
		255	void
		256	pkt_queue::put (net_packet *p)
		257	{
		258	ev_tstamp now = ev_now ();
		259
		260	// start expiry timer
		261	if (empty ())
		262	expire.start (max_ttl);
		263
		264	int ni = i + 1 == max_queue ? 0 : i + 1;
		265
		266	if (ni == j)
		267	delete get ();
		268
		269	queue[i].pkt = p;
		270	queue[i].tstamp = now;
		271
		272	i = ni;
		273	}
		274
		275	net_packet *
		276	pkt_queue::get ()
		277	{
		278	if (empty ())
		279	return 0;
		280
		281	net_packet *p = queue[j].pkt;
		282	queue[j].pkt = 0;
		283
		284	j = j + 1 == max_queue ? 0 : j + 1;
		285
		286	return p;
		287	}
		288
198	struct net_rateinfo {	289	struct net_rateinfo
		290	{
199	u32 host;	291	u32 host;
200	double pcnt, diff;	292	double pcnt, diff;
201	tstamp last;	293	tstamp last;
202	};	294	};
203		295
213		305
214	bool can (const sockinfo &si) { return can((u32)si.host); }	306	bool can (const sockinfo &si) { return can((u32)si.host); }
215	bool can (u32 host);	307	bool can (u32 host);
216	};	308	};
217		309
218	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	310	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
219		311
		312	bool
220	bool net_rate_limiter::can (u32 host)	313	net_rate_limiter::can (u32 host)
221	{	314	{
222	iterator i;	315	iterator i;
223		316
224	for (i = begin (); i != end (); )	317	for (i = begin (); i != end (); )
225	if (i->host == host)	318	if (i->host == host)
226	break;	319	break;
227	else if (i->last < NOW - NRL_EXPIRE)	320	else if (i->last < ev_now () - NRL_EXPIRE)
228	i = erase (i);	321	i = erase (i);
229	else	322	else
230	i++;	323	i++;
231		324
232	if (i == end ())	325	if (i == end ())
…		…
234	net_rateinfo ri;	327	net_rateinfo ri;
235		328
236	ri.host = host;	329	ri.host = host;
237	ri.pcnt = 1.;	330	ri.pcnt = 1.;
238	ri.diff = NRL_MAXDIF;	331	ri.diff = NRL_MAXDIF;
239	ri.last = NOW;	332	ri.last = ev_now ();
240		333
241	push_front (ri);	334	push_front (ri);
242		335
243	return true;	336	return true;
244	}	337	}
…		…
246	{	339	{
247	net_rateinfo ri (*i);	340	net_rateinfo ri (*i);
248	erase (i);	341	erase (i);
249		342
250	ri.pcnt = ri.pcnt * NRL_ALPHA;	343	ri.pcnt = ri.pcnt * NRL_ALPHA;
251	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	344	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
252		345
253	ri.last = NOW;	346	ri.last = ev_now ();
254		347
255	double dif = ri.diff / ri.pcnt;	348	double dif = ri.diff / ri.pcnt;
256		349
257	bool send = dif > NRL_CUTOFF;	350	bool send = dif > NRL_CUTOFF;
258		351
…		…
272		365
273	/////////////////////////////////////////////////////////////////////////////	366	/////////////////////////////////////////////////////////////////////////////
274		367
275	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	368	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
276		369
		370	void
277	void hmac_packet::hmac_gen (crypto_ctx *ctx)	371	hmac_packet::hmac_gen (crypto_ctx *ctx)
278	{	372	{
279	unsigned int xlen;	373	unsigned int xlen;
280		374
281	HMAC_CTX *hctx = &ctx->hctx;	375	HMAC_CTX *hctx = &ctx->hctx;
282		376
283	HMAC_Init_ex (hctx, 0, 0, 0, 0);	377	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
284	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	378	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
285	len - sizeof (hmac_packet));	379	len - sizeof (hmac_packet)));
286	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	380	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
287	}	381	}
288		382
289	void	383	void
290	hmac_packet::hmac_set (crypto_ctx *ctx)	384	hmac_packet::hmac_set (crypto_ctx *ctx)
291	{	385	{
…		…
300	hmac_gen (ctx);	394	hmac_gen (ctx);
301		395
302	return !memcmp (hmac, hmac_digest, HMACLENGTH);	396	return !memcmp (hmac, hmac_digest, HMACLENGTH);
303	}	397	}
304		398
		399	void
305	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	400	vpn_packet::set_hdr (ptype type_, unsigned int dst)
306	{	401	{
307	type = type_;	402	type = type_;
308		403
309	int src = THISNODE->id;	404	int src = THISNODE->id;
310		405
…		…
315		410
316	#define MAXVPNDATA (MAX_MTU - 6 - 6)	411	#define MAXVPNDATA (MAX_MTU - 6 - 6)
317	#define DATAHDR (sizeof (u32) + RAND_SIZE)	412	#define DATAHDR (sizeof (u32) + RAND_SIZE)
318		413
319	struct vpndata_packet : vpn_packet	414	struct vpndata_packet : vpn_packet
		415	{
		416	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		417
		418	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		419	tap_packet unpack (connection conn, u32 &seqno);
		420
		421	private:
		422	const u32 data_hdr_size () const
320	{	423	{
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;	424	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
330	}
331	};	425	}
		426	};
332		427
333	void	428	void
334	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	429	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
335	{	430	{
336	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	431	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
338	ptype type = PT_DATA_UNCOMPRESSED;	433	ptype type = PT_DATA_UNCOMPRESSED;
339		434
340	#if ENABLE_COMPRESSION	435	#if ENABLE_COMPRESSION
341	u8 cdata[MAX_MTU];	436	u8 cdata[MAX_MTU];
342		437
343	if (conn->features & ENABLE_COMPRESSION)	438	if (conn->features & FEATURE_COMPRESSION)
344	{	439	{
345	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	440	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
346		441
347	if (cl)	442	if (cl)
348	{	443	{
…		…
354	d[1] = cl;	449	d[1] = cl;
355	}	450	}
356	}	451	}
357	#endif	452	#endif
358		453
359	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	454	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
360		455
361	struct {	456	struct {
362	#if RAND_SIZE	457	#if RAND_SIZE
363	u8 rnd[RAND_SIZE];	458	u8 rnd[RAND_SIZE];
364	#endif	459	#endif
365	u32 seqno;	460	u32 seqno;
366	} datahdr;	461	} datahdr;
367		462
368	datahdr.seqno = ntohl (seqno);	463	datahdr.seqno = ntohl (seqno);
369	#if RAND_SIZE	464	#if RAND_SIZE
370	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	465	// NB: a constant (per session) random prefix
		466	// is likely enough, but we don't take any chances.
		467	conn->oiv.get (datahdr.rnd, RAND_SIZE);
371	#endif	468	#endif
372		469
373	require (EVP_EncryptUpdate (cctx,	470	require (EVP_EncryptUpdate (cctx,
374	(unsigned char *) data + outl, &outl2,	471	(unsigned char *) data + outl, &outl2,
375	(unsigned char *) &datahdr, DATAHDR));	472	(unsigned char *) &datahdr, DATAHDR));
…		…
397	int outl = 0, outl2;	494	int outl = 0, outl2;
398	tap_packet *p = new tap_packet;	495	tap_packet *p = new tap_packet;
399	u8 *d;	496	u8 *d;
400	u32 l = len - data_hdr_size ();	497	u32 l = len - data_hdr_size ();
401		498
402	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	499	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
403		500
404	#if ENABLE_COMPRESSION	501	#if ENABLE_COMPRESSION
405	u8 cdata[MAX_MTU];	502	u8 cdata[MAX_MTU];
406		503
407	if (type == PT_DATA_COMPRESSED)	504	if (type == PT_DATA_COMPRESSED)
408	d = cdata;	505	d = cdata;
409	else	506	else
410	#endif	507	#endif
411	d = &(*p)[6 + 6 - DATAHDR];	508	d = &(*p)[6 + 6] - DATAHDR;
412		509
413	/* this overwrites part of the src mac, but we fix that later */	510	// we play do evil games with the struct layout atm.
		511	// pending better solutions, we at least do some verification.
		512	// this is fine, as we left ISO territory long ago.
		513	require (DATAHDR <= 16);
		514	require ((u8 )(&p->len + 1) == &(p)[0]);
		515
		516	// this can overwrite the len/dst/src fields
414	require (EVP_DecryptUpdate (cctx,	517	require (EVP_DecryptUpdate (cctx,
415	d, &outl2,	518	d, &outl2,
416	(unsigned char *)&data, len - data_hdr_size ()));	519	(unsigned char *)&data, len - data_hdr_size ()));
417	outl += outl2;	520	outl += outl2;
418		521
…		…
449	}	552	}
450	};	553	};
451		554
452	struct config_packet : vpn_packet	555	struct config_packet : vpn_packet
453	{	556	{
454	// actually, hmaclen cannot be checked because the hmac	557	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;	558	u8 prot_major, prot_minor, randsize;
458	u8 flags, challengelen, features, pad3;	559	u8 flags, features, pad6, pad7, pad8;
459	u32 cipher_nid, digest_nid, hmac_nid;	560	u32 cipher_nid, mac_nid, auth_nid;
460		561
461	void setup (ptype type, int dst);	562	void setup (ptype type, int dst);
462	bool chk_config () const;	563	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
463		564
464	static u8 get_features ()	565	static u8 get_features ()
465	{	566	{
466	u8 f = 0;	567	u8 f = 0;
467	#if ENABLE_COMPRESSION	568	#if ENABLE_COMPRESSION
468	f \|= FEATURE_COMPRESSION;	569	f \|= FEATURE_COMPRESSION;
469	#endif	570	#endif
470	#if ENABLE_ROHC	571	#if ENABLE_ROHC
471	f \|= FEATURE_ROHC;	572	f \|= FEATURE_ROHC;
472	#endif	573	#endif
		574	#if ENABLE_BRIDGING
		575	f \|= FEATURE_BRIDGING;
		576	#endif
473	return f;	577	return f;
474	}	578	}
475	};	579	};
476		580
		581	void
477	void config_packet::setup (ptype type, int dst)	582	config_packet::setup (ptype type, int dst)
478	{	583	{
479	prot_major = PROTOCOL_MAJOR;	584	prot_major = PROTOCOL_MAJOR;
480	prot_minor = PROTOCOL_MINOR;	585	prot_minor = PROTOCOL_MINOR;
481	randsize = RAND_SIZE;	586	randsize = RAND_SIZE;
482	hmaclen = HMACLENGTH;	587	flags = 0;
483	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
484	challengelen = sizeof (rsachallenge);
485	features = get_features ();	588	features = get_features ();
486		589
		590	strncpy ((char *)serial, conf.serial, sizeof (serial));
		591
487	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	592	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
488	digest_nid = htonl (EVP_MD_type (RSA_HASH));
489	hmac_nid = htonl (EVP_MD_type (DIGEST));	593	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		594	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
490		595
491	len = sizeof (*this) - sizeof (net_packet);	596	len = sizeof (*this) - sizeof (net_packet);
492	set_hdr (type, dst);	597	set_hdr (type, dst);
493	}	598	}
494		599
495	bool config_packet::chk_config () const	600	bool
		601	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
496	{	602	{
497	if (prot_major != PROTOCOL_MAJOR)	603	if (prot_major != PROTOCOL_MAJOR)
498	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	604	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		605	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
499	else if (randsize != RAND_SIZE)	606	else if (randsize != RAND_SIZE)
500	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	607	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
501	else if (hmaclen != HMACLENGTH)	608	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
502	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
503	#if 0 // this implementation should handle all flag settings
504	else if (flags != curflags ())
505	slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ());
506	#endif
507	else if (challengelen != sizeof (rsachallenge))
508	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
509	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	609	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
510	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	610	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
511	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	611	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
512	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
513	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	612	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
514	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	613	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		614	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		615	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		616	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		617	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
515	else	618	else
		619	{
		620	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		621
		622	if (cmp > 0)
		623	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		624	conf->nodename, (const char *)rsi);
		625	else if (cmp == 0)
516	return true;	626	return true;
		627	}
517		628
518	return false;	629	return false;
519	}	630	}
520		631
521	struct auth_req_packet : config_packet	632	struct auth_req_packet : config_packet // UNPROTECTED
522	{	633	{
523	char magic[8];	634	char magic[8];
524	u8 initiate; // false if this is just an automatic reply	635	u8 initiate; // false if this is just an automatic reply
525	u8 protocols; // supported protocols (will be patched on forward)	636	u8 protocols; // supported protocols (will be patched on forward)
526	u8 pad2, pad3;	637	u8 pad2, pad3;
527	rsaid id;	638	auth_encr encr;
528	rsaencrdata encr;
529		639
530	auth_req_packet (int dst, bool initiate_, u8 protocols_)	640	auth_req_packet (int dst, bool initiate_, u8 protocols_)
531	{	641	{
532	config_packet::setup (PT_AUTH_REQ, dst);	642	config_packet::setup (PT_AUTH_REQ, dst);
533	strncpy (magic, MAGIC, 8);	643	memcpy (magic, MAGIC, 8);
534	initiate = !!initiate_;	644	initiate = !!initiate_;
535	protocols = protocols_;	645	protocols = protocols_;
536		646
537	len = sizeof (*this) - sizeof (net_packet);	647	len = sizeof (*this) - sizeof (net_packet);
538	}	648	}
539	};	649	};
540		650
541	struct auth_res_packet : config_packet	651	struct auth_res_packet : vpn_packet // UNPROTECTED
542	{	652	{
543	rsaid id;
544	u8 pad1, pad2, pad3;
545	u8 response_len; // encrypted length
546	rsaresponse response;	653	auth_response response;
547		654
548	auth_res_packet (int dst)	655	auth_res_packet (int dst)
549	{	656	{
550	config_packet::setup (PT_AUTH_RES, dst);	657	set_hdr (PT_AUTH_RES, dst);
551		658
552	len = sizeof (*this) - sizeof (net_packet);	659	len = sizeof (*this) - sizeof (net_packet);
553	}	660	}
554	};	661	};
555		662
…		…
585	};	692	};
586		693
587	/////////////////////////////////////////////////////////////////////////////	694	/////////////////////////////////////////////////////////////////////////////
588		695
589	void	696	void
590	connection::connection_established ()	697	connection::connection_established (const sockinfo &rsi)
591	{	698	{
		699	if (!have_snd_auth \|\| !have_rcv_auth)
		700	return;
		701
		702	si = rsi;
		703	protocol = rsi.prot;
		704
		705	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		706	conf->nodename, (const char *)rsi,
		707	is_direct ? "direct" : "forwarded",
		708	PROTOCOL_MAJOR, prot_minor);
		709
		710	if (::conf.script_node_up)
		711	{
		712	run_script_cb *cb = new run_script_cb;
		713	cb->set<connection, &connection::script_node_up> (this);
		714	run_script_queued (cb, _("node-up command execution failed, continuing."));
		715	}
		716
		717	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		718	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		719
		720	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		721	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		722
		723	oiv.reset ();
		724
		725	// make sure rekeying timeouts are slightly asymmetric
		726	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		727	rekey.start (rekey_interval, rekey_interval);
		728
		729	keepalive.start (::conf.keepalive);
		730
		731	// send queued packets
592	if (ictx && octx)	732	if (ictx && octx)
593	{	733	{
594	connectmode = conf->connectmode;	734	while (tap_packet p = (tap_packet )data_queue.get ())
595
596	// make sure rekeying timeouts are slightly asymmetric
597	rekey.start (NOW + ::conf.rekey
598	+ (conf->id > THISNODE->id ? 10 : 0));
599	keepalive.start (NOW + ::conf.keepalive);
600
601	// send queued packets
602	if (ictx && octx)
603	{	735	{
604	while (tap_packet p = (tap_packet )data_queue.get ())
605	{
606	send_data_packet (p);	736	if (p->len) send_data_packet (p);
607	delete p;	737	delete p;
608	}
609
610	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
611	{
612	send_vpn_packet (p, si, IPTOS_RELIABILITY);
613	delete p;
614	}
615	}	738	}
		739
		740	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		741	{
		742	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
		743	delete p;
		744	}
616	}	745	}
		746
		747	vpn->connection_established (this);
		748	}
		749
		750	void
		751	connection::reset_si ()
		752	{
		753	if (vpn->can_direct (THISNODE, conf))
		754	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
617	else	755	else
618	{	756	{
619	retry_cnt = 0;	757	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
620	establish_connection.start (NOW + 5);	758	protocol = 0;
621	keepalive.stop ();
622	rekey.stop ();
623	}	759	}
624	}
625
626	void
627	connection::reset_si ()
628	{
629	protocol = best_protocol (THISNODE->protocols & conf->protocols);
630
631	// mask out protocols we cannot establish
632	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
633	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
634	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
635		760
636	si.set (conf, protocol);	761	si.set (conf, protocol);
		762
		763	is_direct = si.valid ();
637	}	764	}
638		765
639	// ensure sockinfo is valid, forward if necessary	766	// ensure sockinfo is valid, forward if necessary
640	const sockinfo &	767	const sockinfo &
641	connection::forward_si (const sockinfo &si) const	768	connection::forward_si (const sockinfo &si) const
642	{	769	{
643	if (!si.valid ())	770	if (!si.valid ())
644	{	771	{
645	connection *r = vpn->find_router ();	772	connection *r = vpn->find_router_for (this);
646		773
647	if (r)	774	if (r)
648	{	775	{
649	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	776	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
650	conf->nodename, r->conf->nodename, (const char *)r->si);	777	conf->nodename, r->conf->nodename);
651	return r->si;	778	return r->si;
652	}	779	}
653	else	780	else
654	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	781	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
655	conf->nodename);	782	conf->nodename);
656	}	783	}
657		784
658	return si;	785	return si;
659	}	786	}
…		…
669	connection::send_ping (const sockinfo &si, u8 pong)	796	connection::send_ping (const sockinfo &si, u8 pong)
670	{	797	{
671	ping_packet *pkt = new ping_packet;	798	ping_packet *pkt = new ping_packet;
672		799
673	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	800	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		801
		802	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
674	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	803	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
675		804
676	delete pkt;	805	delete pkt;
677	}	806	}
678		807
…		…
693	void	822	void
694	connection::send_auth_request (const sockinfo &si, bool initiate)	823	connection::send_auth_request (const sockinfo &si, bool initiate)
695	{	824	{
696	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	825	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
697		826
698	rsachallenge chg;	827	generate_auth_data ();
699	rsa_cache.gen (pkt->id, chg);
700	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	828	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
701		829
702	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	830	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
703
704	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	831	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
705		832
706	delete pkt;	833	delete pkt;
707	}	834	}
708		835
709	void	836	void
710	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	837	connection::send_auth_response (const sockinfo &si)
711	{	838	{
712	auth_res_packet *pkt = new auth_res_packet (conf->id);	839	auth_res_packet *pkt = new auth_res_packet (conf->id);
713		840
714	pkt->id = id;	841	auth_hash (rcv_auth, pkt->response.mac);
		842	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
715		843
716	rsa_hash (id, chg, pkt->response);
717
718	pkt->hmac_set (octx);
719
720	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	844	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
721
722	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	845	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
723		846
724	delete pkt;	847	delete pkt;
725	}	848	}
726		849
727	void	850	void
728	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	851	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
729	{	852	{
730	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	853	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
731	conf->id, rid, (const char *)rsi);	854	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		855	conf->protocols);
732		856
733	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	857	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
734		858
735	r->hmac_set (octx);	859	r->hmac_set (octx);
736	send_vpn_packet (r, si);	860	send_vpn_packet (r, si);
737		861
738	delete r;	862	delete r;
739	}	863	}
740		864
741	void	865	inline void
742	connection::establish_connection_cb (time_watcher &w)	866	connection::establish_connection_cb (ev::timer &w, int revents)
743	{	867	{
744	if (!ictx	868	if (!(ictx && octx)
745	&& conf != THISNODE	869	&& conf != THISNODE
746	&& connectmode != conf_node::C_NEVER	870	&& connectmode != conf_node::C_NEVER
747	&& connectmode != conf_node::C_DISABLED	871	&& connectmode != conf_node::C_DISABLED
748	&& NOW > w.at)	872	&& !w.is_active ())
749	{	873	{
750	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	874	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
751		875	// and stop trying. should probably be handled by a per-connection expire handler.
752	if (retry_int < conf->max_retry)	876	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		877	{
		878	reset_connection ();
753	retry_cnt++;	879	return;
754	else	880	}
755	retry_int = conf->max_retry;
756		881
757	w.start (NOW + retry_int);	882	last_establish_attempt = ev_now ();
		883
		884	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		885	? (retry_cnt & 3) + 1
		886	: 1 << (retry_cnt >> 2));
758		887
759	reset_si ();	888	reset_si ();
760		889
761	if (si.prot && !si.host)	890	bool slow = si.prot & PROT_SLOW;
		891
		892	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		893	{
		894	/TODO/ /* start the timer so we don't recurse endlessly */
		895	w.start (1);
762	vpn->send_connect_request (conf->id);	896	vpn->send_connect_request (this);
		897	}
763	else	898	else
764	{	899	{
		900	if (si.valid ())
		901	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		902	conf->nodename, (const char *)si);
		903
765	const sockinfo &dsi = forward_si (si);	904	const sockinfo &dsi = forward_si (si);
		905
		906	slow = slow \|\| (dsi.prot & PROT_SLOW);
766		907
767	if (dsi.valid () && auth_rate_limiter.can (dsi))	908	if (dsi.valid () && auth_rate_limiter.can (dsi))
768	{	909	{
769	if (retry_cnt < 4)	910	if (retry_cnt < 4)
770	send_auth_request (dsi, true);	911	send_auth_request (dsi, true);
771	else	912	else
772	send_ping (dsi, 0);	913	send_ping (dsi, 0);
773	}	914	}
774	}	915	}
		916
		917	retry_int *= slow ? 8. : 0.9;
		918
		919	if (retry_int < conf->max_retry)
		920	retry_cnt++;
		921	else
		922	retry_int = conf->max_retry;
		923
		924	w.start (retry_int);
775	}	925	}
776	}	926	}
777		927
778	void	928	void
779	connection::reset_connection ()	929	connection::reset_connection ()
…		…
782	{	932	{
783	slog (L_INFO, _("%s(%s): connection lost"),	933	slog (L_INFO, _("%s(%s): connection lost"),
784	conf->nodename, (const char *)si);	934	conf->nodename, (const char *)si);
785		935
786	if (::conf.script_node_down)	936	if (::conf.script_node_down)
787	run_script (run_script_cb (this, &connection::script_node_down), false);	937	{
		938	run_script_cb *cb = new run_script_cb;
		939	cb->set<connection, &connection::script_node_down> (this);
		940	run_script_queued (cb, _("node-down command execution failed, continuing."));
		941	}
788	}	942	}
789		943
790	delete ictx; ictx = 0;	944	delete ictx; ictx = 0;
791	delete octx; octx = 0;	945	delete octx; octx = 0;
792	#if ENABLE_DNS
793	dnsv4_reset_connection ();
794	#endif
795		946
796	si.host = 0;	947	si.host = 0;
797		948
		949	have_snd_auth = false;
		950	have_rcv_auth = false;
		951	auth_expire = 0.;
		952
798	last_activity = 0;	953	last_activity = 0.;
		954	//last_si_change = 0.;
799	retry_cnt = 0;	955	retry_cnt = 0;
800		956
801	rekey.stop ();	957	rekey.stop ();
802	keepalive.stop ();	958	keepalive.stop ();
803	establish_connection.stop ();	959	establish_connection.stop ();
…		…
810	send_reset (si);	966	send_reset (si);
811		967
812	reset_connection ();	968	reset_connection ();
813	}	969	}
814		970
815	void	971	// poor-man's rekeying
816	connection::rekey_cb (time_watcher &w)	972	inline void
		973	connection::rekey_cb (ev::timer &w, int revents)
817	{	974	{
818	reset_connection ();	975	reset_connection ();
819	establish_connection ();	976	establish_connection ();
820	}	977	}
821		978
…		…
837	if (oseqno > MAX_SEQNO)	994	if (oseqno > MAX_SEQNO)
838	rekey ();	995	rekey ();
839	}	996	}
840		997
841	void	998	void
		999	connection::post_inject_queue ()
		1000	{
		1001	// force a connection every now and when when packets are sent (max 1/s)
		1002	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		1003	establish_connection.stop ();
		1004
		1005	establish_connection ();
		1006	}
		1007
		1008	void
842	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1009	connection::inject_data_packet (tap_packet *pkt)
843	{	1010	{
844	if (ictx && octx)	1011	if (ictx && octx)
845	send_data_packet (pkt);	1012	send_data_packet (pkt);
846	else	1013	else
847	{	1014	{
848	if (!broadcast)//DDDD
849	data_queue.put (new tap_packet (*pkt));	1015	data_queue.put (new tap_packet (*pkt));
850		1016	post_inject_queue ();
851	establish_connection ();
852	}	1017	}
853	}	1018	}
854		1019
		1020	void
855	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1021	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
856	{	1022	{
857	if (ictx && octx)	1023	if (ictx && octx)
858	send_vpn_packet (pkt, si, tos);	1024	send_vpn_packet (pkt, si, tos);
859	else	1025	else
860	{	1026	{
861	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1027	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
862		1028	post_inject_queue ();
863	establish_connection ();
864	}	1029	}
865	}	1030	}
866		1031
867	void	1032	void
868	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1033	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
869	{	1034	{
870	last_activity = NOW;	1035	last_activity = ev_now ();
871		1036
872	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1037	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
873	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1038	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1039
		1040	if (connectmode == conf_node::C_DISABLED)
		1041	return;
874		1042
875	switch (pkt->typ ())	1043	switch (pkt->typ ())
876	{	1044	{
877	case vpn_packet::PT_PING:	1045	case vpn_packet::PT_PING:
		1046	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1047
878	// we send pings instead of auth packets after some retries,	1048	// we send pings instead of auth packets after some retries,
879	// so reset the retry counter and establish a connection	1049	// so reset the retry counter and establish a connection
880	// when we receive a ping.	1050	// when we receive a ping.
881	if (!ictx)	1051	if (!ictx)
882	{	1052	{
883	if (auth_rate_limiter.can (rsi))	1053	if (auth_rate_limiter.can (rsi))
884	send_auth_request (rsi, true);	1054	send_auth_request (rsi, true);
885	}	1055	}
886	else	1056	else
		1057	// we would love to change the socket address here, but ping's aren't
		1058	// authenticated, so we best ignore it.
887	send_ping (rsi, 1); // pong	1059	send_ping (rsi, 1); // pong
888		1060
889	break;	1061	break;
890		1062
891	case vpn_packet::PT_PONG:	1063	case vpn_packet::PT_PONG:
		1064	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1065
		1066	// a PONG might mean that the other side doesn't really know
		1067	// about our desire for communication.
		1068	establish_connection ();
892	break;	1069	break;
893		1070
894	case vpn_packet::PT_RESET:	1071	case vpn_packet::PT_RESET:
895	{	1072	{
896	reset_connection ();	1073	reset_connection ();
897		1074
898	config_packet p = (config_packet ) pkt;	1075	config_packet p = (config_packet ) pkt;
899		1076
900	if (!p->chk_config ())	1077	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
901	{
902	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
903	conf->nodename, (const char *)rsi);
904	connectmode = conf_node::C_DISABLED;
905	}
906	else if (connectmode == conf_node::C_ALWAYS)
907	establish_connection ();	1078	establish_connection ();
908	}	1079	}
909	break;	1080	break;
910		1081
911	case vpn_packet::PT_AUTH_REQ:	1082	case vpn_packet::PT_AUTH_REQ:
912	if (auth_rate_limiter.can (rsi))	1083	if (auth_rate_limiter.can (rsi))
913	{	1084	{
914	auth_req_packet p = (auth_req_packet ) pkt;	1085	auth_req_packet p = (auth_req_packet )pkt;
915		1086
916	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1087	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1088	conf->nodename, p->initiate ? "initiate" : "reply",
		1089	p->protocols, p->features);
917		1090
918	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1091	if (memcmp (p->magic, MAGIC, 8))
		1092	{
		1093	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1094	conf->nodename, (const char *)rsi);
		1095	}
		1096	else if (p->chk_config (conf, rsi))
919	{	1097	{
920	if (p->prot_minor != PROTOCOL_MINOR)	1098	if (p->prot_minor != PROTOCOL_MINOR)
921	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1099	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
922	conf->nodename, (const char *)rsi,	1100	conf->nodename, (const char *)rsi,
923	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1101	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
924		1102
925	if (p->initiate)	1103	if (p->initiate)
926	send_auth_request (rsi, false);	1104	send_auth_request (rsi, false);
927		1105
928	rsachallenge k;	1106	auth_data auth;
929		1107
930	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1108	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
931	{	1109	{
932	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1110	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
933	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1111	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
934	break;
935	}	1112	}
936	else	1113	else
937	{	1114	{
938	delete octx;	1115	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
939		1116
940	octx = new crypto_ctx (k, 1);	1117	rcv_auth = auth;
941	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1118	have_rcv_auth = true;
942		1119
943	// compatibility code, remove when no longer required	1120	send_auth_response (rsi);
944	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
945		1121
		1122	if (chg)
		1123	{
946	conf->protocols = p->protocols;	1124	conf->protocols = p->protocols;
947	features = p->features & config_packet::get_features ();	1125	features = p->features & config_packet::get_features ();
948		1126
949	send_auth_response (rsi, p->id, k);
950
951	connection_established ();	1127	connection_established (rsi);
952
953	break;	1128	}
954	}	1129	}
		1130
		1131	break;
955	}	1132	}
956	else
957	slog (L_WARN, _("%s(%s): protocol mismatch"),
958	conf->nodename, (const char *)rsi);
959		1133
960	send_reset (rsi);	1134	send_reset (rsi);
961	}	1135	}
962		1136
963	break;	1137	break;
964		1138
965	case vpn_packet::PT_AUTH_RES:	1139	case vpn_packet::PT_AUTH_RES:
966	{	1140	{
967	auth_res_packet p = (auth_res_packet ) pkt;	1141	auth_res_packet p = (auth_res_packet )pkt;
968		1142
969	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1143	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
970		1144
971	if (p->chk_config ())	1145	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
972	{	1146	{
973	if (p->prot_minor != PROTOCOL_MINOR)
974	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
975	conf->nodename, (const char *)rsi,
976	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
977
978	rsachallenge chg;
979
980	if (!rsa_cache.find (p->id, chg))
981	{
982	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1147	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
983	conf->nodename, (const char *)rsi);	1148	conf->nodename, (const char *)rsi);
984	break;
985	}
986	else
987	{
988	crypto_ctx *cctx = new crypto_ctx (chg, 0);
989
990	if (!p->hmac_chk (cctx))
991	{
992	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
993	"could be an attack, or just corruption or a synchronization error"),
994	conf->nodename, (const char *)rsi);
995	break;
996	}
997	else
998	{
999	rsaresponse h;
1000
1001	rsa_hash (p->id, chg, h);
1002
1003	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1004	{
1005	prot_minor = p->prot_minor;
1006
1007	delete ictx; ictx = cctx;
1008
1009	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1010
1011	si = rsi;
1012	protocol = rsi.prot;
1013
1014	connection_established ();
1015
1016	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1017	conf->nodename, (const char *)rsi,
1018	p->prot_major, p->prot_minor);
1019
1020	if (::conf.script_node_up)
1021	run_script (run_script_cb (this, &connection::script_node_up), false);
1022
1023	break;
1024	}
1025	else
1026	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1027	conf->nodename, (const char *)rsi);
1028	}
1029
1030	delete cctx;
1031	}
1032	}	1149	}
		1150	else if (!have_snd_auth)
		1151	{
		1152	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
		1153
		1154	have_snd_auth = true;
		1155	connection_established (rsi);
		1156	}
		1157
		1158	break;
1033	}	1159	}
1034		1160
1035	send_reset (rsi);	1161	send_reset (rsi);
1036	break;	1162	break;
1037		1163
…		…
1047	{	1173	{
1048	vpndata_packet p = (vpndata_packet )pkt;	1174	vpndata_packet p = (vpndata_packet )pkt;
1049		1175
1050	if (!p->hmac_chk (ictx))	1176	if (!p->hmac_chk (ictx))
1051	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1177	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1052	"could be an attack, or just corruption or a synchronization error"),	1178	"could be an attack, or just corruption or a synchronization error."),
1053	conf->nodename, (const char *)rsi);	1179	conf->nodename, (const char *)rsi);
1054	else	1180	else
1055	{	1181	{
1056	u32 seqno;	1182	u32 seqno;
1057	tap_packet *d = p->unpack (this, seqno);	1183	tap_packet *d = p->unpack (this, seqno);
		1184	int seqclass = iseqno.seqno_classify (seqno);
1058		1185
1059	if (iseqno.recv_ok (seqno))	1186	if (seqclass == 0) // ok
1060	{	1187	{
1061	vpn->tap->send (d);	1188	vpn->tap->send (d);
1062		1189
1063	if (si != rsi)	1190	if (si != rsi)
1064	{	1191	{
1065	// fast re-sync on connection changes, useful especially for tcp/ip	1192	// fast re-sync on source address changes, useful especially for tcp/ip
		1193	//if (last_si_change < ev_now () + 5.)
1066	si = rsi;	1194	// {
1067
1068	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1195	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1069	conf->nodename, (const char )si, (const char )rsi);	1196	conf->nodename, (const char )si, (const char )rsi);
		1197
		1198	si = rsi;
		1199
		1200	if (::conf.script_node_change)
		1201	{
		1202	run_script_cb *cb = new run_script_cb;
		1203	cb->set<connection, &connection::script_node_change> (this);
		1204	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1205	}
		1206
		1207	// }
		1208	//else
		1209	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1210	// conf->nodename, (const char )si, (const char )rsi);
1070	}	1211	}
		1212	}
		1213	else if (seqclass == 1) // far history
		1214	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1215	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1216	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1217	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1218	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1219	else if (seqclass == 3) // reset
		1220	{
		1221	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1222	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1223	send_reset (rsi);
1071	}	1224	}
1072		1225
1073	delete d;	1226	delete d;
1074	break;	1227	break;
1075	}	1228	}
…		…
1079	break;	1232	break;
1080		1233
1081	case vpn_packet::PT_CONNECT_REQ:	1234	case vpn_packet::PT_CONNECT_REQ:
1082	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1235	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1083	{	1236	{
1084	connect_req_packet p = (connect_req_packet ) pkt;	1237	connect_req_packet p = (connect_req_packet )pkt;
1085		1238
1086	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1239	if (p->id > 0 && p->id <= vpn->conns.size ())
1087	connection *c = vpn->conns[p->id - 1];
1088	conf->protocols = p->protocols;
1089
1090	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1091	conf->id, p->id, c->ictx && c->octx);
1092
1093	if (c->ictx && c->octx)
1094	{	1240	{
		1241	connection *c = vpn->conns[p->id - 1];
		1242	conf->protocols = p->protocols;
		1243
		1244	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1245	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1246	p->protocols,
		1247	c->ictx && c->octx);
		1248
		1249	if (c->ictx && c->octx)
		1250	{
1095	// send connect_info packets to both sides, in case one is	1251	// send connect_info packets to both sides, in case one is
1096	// behind a nat firewall (or both ;)	1252	// behind a nat firewall (or both ;)
1097	c->send_connect_info (conf->id, si, conf->protocols);	1253	c->send_connect_info (conf->id, si, conf->protocols);
1098	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1254	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1255	}
		1256	else
		1257	c->establish_connection ();
1099	}	1258	}
1100	else	1259	else
1101	c->establish_connection ();	1260	slog (L_WARN,
		1261	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1262	p->id);
1102	}	1263	}
1103		1264
1104	break;	1265	break;
1105		1266
1106	case vpn_packet::PT_CONNECT_INFO:	1267	case vpn_packet::PT_CONNECT_INFO:
1107	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1268	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1108	{	1269	{
1109	connect_info_packet p = (connect_info_packet )pkt;	1270	connect_info_packet p = (connect_info_packet )pkt;
1110		1271
1111	if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything	1272	if (p->id > 0 && p->id <= vpn->conns.size ())
1112	{	1273	{
1113	connection *c = vpn->conns[p->id - 1];	1274	connection *c = vpn->conns[p->id - 1];
1114		1275
1115	c->conf->protocols = p->protocols;	1276	c->conf->protocols = p->protocols;
1116	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1277	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1117	p->si.upgrade_protocol (protocol, c->conf);	1278	p->si.upgrade_protocol (protocol, c->conf);
1118		1279
1119	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1280	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1120	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1281	conf->nodename,
		1282	vpn->conns[p->id - 1]->conf->nodename,
		1283	(const char *)p->si,
		1284	p->protocols,
		1285	protocol,
		1286	p->si.supported_protocols (c->conf),
		1287	!c->ictx && !c->octx);
1121		1288
1122	const sockinfo &dsi = forward_si (p->si);	1289	const sockinfo &dsi = forward_si (p->si);
1123		1290
1124	if (dsi.valid ())	1291	if (dsi.valid ())
1125	c->send_auth_request (dsi, true);	1292	c->send_auth_request (dsi, true);
		1293	else
		1294	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1295	vpn->conns[p->id - 1]->conf->nodename,
		1296	(const char *)p->si);
1126	}	1297	}
		1298	else
		1299	slog (L_WARN,
		1300	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1301	p->id);
1127	}	1302	}
1128		1303
1129	break;	1304	break;
1130		1305
1131	default:	1306	default:
1132	send_reset (rsi);	1307	send_reset (rsi);
1133	break;	1308	break;
1134	}	1309	}
1135	}	1310	}
1136		1311
1137	void connection::keepalive_cb (time_watcher &w)	1312	inline void
		1313	connection::keepalive_cb (ev::timer &w, int revents)
1138	{	1314	{
1139	if (NOW >= last_activity + ::conf.keepalive + 30)	1315	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1316
		1317	if (when >= 0)
		1318	w.start (when);
		1319	else if (when < -15)
1140	{	1320	{
1141	reset_connection ();	1321	reset_connection ();
1142	establish_connection ();	1322	establish_connection ();
1143	}	1323	}
1144	else if (NOW < last_activity + ::conf.keepalive)
1145	w.start (last_activity + ::conf.keepalive);
1146	else if (conf->connectmode != conf_node::C_ONDEMAND	1324	else if (conf->connectmode != conf_node::C_ONDEMAND
1147	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1325	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1148	{	1326	{
		1327	w.start (3);
1149	send_ping (si);	1328	send_ping (si);
1150	w.start (NOW + 5);
1151	}	1329	}
1152	else if (NOW < last_activity + ::conf.keepalive + 10)	1330	else if (when >= -10)
1153	// hold ondemand connections implicitly a few seconds longer	1331	// hold ondemand connections implicitly a few seconds longer
1154	// should delete octx, though, or something like that ;)	1332	// should delete octx, though, or something like that ;)
1155	w.start (last_activity + ::conf.keepalive + 10);	1333	w.start (when + 10);
1156	else	1334	else
1157	reset_connection ();	1335	reset_connection ();
1158	}	1336	}
1159		1337
		1338	void
1160	void connection::send_connect_request (int id)	1339	connection::send_connect_request (int id)
1161	{	1340	{
1162	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1341	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1163		1342
1164	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1343	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1344	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1345	THISNODE->protocols);
1165	p->hmac_set (octx);	1346	p->hmac_set (octx);
1166	send_vpn_packet (p, si);	1347	send_vpn_packet (p, si);
1167		1348
1168	delete p;	1349	delete p;
1169	}	1350	}
1170		1351
1171	void connection::script_node ()	1352	void
		1353	connection::script_init_env (const char *ext)
1172	{	1354	{
1173	vpn->script_if_up ();
1174
1175	char *env;	1355	char *env;
		1356	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1357	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1358	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1359	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1360	conf->id & 0xff); putenv (env);
		1361	}
		1362
		1363	void
		1364	connection::script_init_connect_env ()
		1365	{
		1366	vpn->script_init_env ();
		1367
		1368	char *env;
1176	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1369	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1370	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1177	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1371	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1178	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1372	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1179	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1373	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1180	}	1374	}
1181		1375
		1376	inline const char *
1182	const char *connection::script_node_up ()	1377	connection::script_node_up ()
1183	{	1378	{
1184	script_node ();	1379	script_init_connect_env ();
1185		1380
1186	putenv ("STATE=up");	1381	putenv ((char *)"STATE=up");
1187		1382
		1383	char *filename;
		1384	asprintf (&filename,
		1385	"%s/%s",
		1386	confbase,
1188	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1387	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1189	}
1190		1388
		1389	return filename;
		1390	}
		1391
		1392	inline const char *
		1393	connection::script_node_change ()
		1394	{
		1395	script_init_connect_env ();
		1396
		1397	putenv ((char *)"STATE=change");
		1398
		1399	char *filename;
		1400	asprintf (&filename,
		1401	"%s/%s",
		1402	confbase,
		1403	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1404
		1405	return filename;
		1406	}
		1407
		1408	inline const char *
1191	const char *connection::script_node_down ()	1409	connection::script_node_down ()
1192	{	1410	{
1193	script_node ();	1411	script_init_connect_env ();
1194		1412
1195	putenv ("STATE=down");	1413	putenv ((char *)"STATE=down");
1196		1414
1197	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1415	char *filename;
		1416	asprintf (&filename,
		1417	"%s/%s",
		1418	confbase,
		1419	::conf.script_node_down ? ::conf.script_node_down : "node-down");
		1420
		1421	return filename;
1198	}	1422	}
1199		1423
1200	connection::connection (struct vpn vpn, conf_node conf)	1424	connection::connection (struct vpn vpn, conf_node conf)
1201	: vpn(vpn), conf(conf)	1425	: vpn(vpn), conf(conf),
1202	, rekey (this, &connection::rekey_cb)
1203	, keepalive (this, &connection::keepalive_cb)
1204	, establish_connection (this, &connection::establish_connection_cb)
1205	#if ENABLE_DNS	1426	#if ENABLE_DNS
1206	, dns (0)	1427	dns (0),
1207	#endif	1428	#endif
		1429	data_queue(conf->max_ttl, conf->max_queue + 1),
		1430	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1208	{	1431	{
		1432	rekey .set<connection, &connection::rekey_cb > (this);
		1433	keepalive .set<connection, &connection::keepalive_cb > (this);
		1434	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1435
		1436	last_establish_attempt = 0.;
1209	octx = ictx = 0;	1437	octx = ictx = 0;
1210	retry_cnt = 0;
1211		1438
1212	if (!conf->protocols) // make sure some protocol is enabled	1439	connectmode = conf->connectmode;
1213	conf->protocols = PROT_UDPv4;
1214		1440
1215	connectmode = conf_node::C_ALWAYS; // initial setting	1441	// queue a dummy packet to force an initial connection attempt
		1442	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1443	vpn_queue.put (new net_packet);
		1444
1216	reset_connection ();	1445	reset_connection ();
1217	}	1446	}
1218		1447
1219	connection::~connection ()	1448	connection::~connection ()
1220	{	1449	{
1221	shutdown ();	1450	shutdown ();
1222	}	1451	}
1223		1452
		1453	void
1224	void connection_init ()	1454	connection_init ()
1225	{	1455	{
1226	auth_rate_limiter.clear ();	1456	auth_rate_limiter.clear ();
1227	reset_rate_limiter.clear ();	1457	reset_rate_limiter.clear ();
1228	}	1458	}
1229		1459

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Comparing gvpe/src/connection.C (file contents): Revision 1.46 by pcg, Sat Mar 5 19:13:15 2005 UTC vs. Revision 1.103 by root, Thu Jul 18 17:35:10 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.46 by pcg, Sat Mar 5 19:13:15 2005 UTC vs.
Revision 1.103 by root, Thu Jul 18 17:35:10 2013 UTC