[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 1.103 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;
483	flags = 0;	587	flags = 0;
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	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)))	609	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));	610	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
507	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	611	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)))	612	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));	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 ()));
511	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)
512	return true;	626	return true;
		627	}
513		628
514	return false;	629	return false;
515	}	630	}
516		631
517	struct auth_req_packet : config_packet	632	struct auth_req_packet : config_packet // UNPROTECTED
518	{	633	{
519	char magic[8];	634	char magic[8];
520	u8 initiate; // false if this is just an automatic reply	635	u8 initiate; // false if this is just an automatic reply
521	u8 protocols; // supported protocols (will be patched on forward)	636	u8 protocols; // supported protocols (will be patched on forward)
522	u8 pad2, pad3;	637	u8 pad2, pad3;
523	rsaid id;	638	auth_encr encr;
524	rsaencrdata encr;
525		639
526	auth_req_packet (int dst, bool initiate_, u8 protocols_)	640	auth_req_packet (int dst, bool initiate_, u8 protocols_)
527	{	641	{
528	config_packet::setup (PT_AUTH_REQ, dst);	642	config_packet::setup (PT_AUTH_REQ, dst);
529	strncpy (magic, MAGIC, 8);	643	memcpy (magic, MAGIC, 8);
530	initiate = !!initiate_;	644	initiate = !!initiate_;
531	protocols = protocols_;	645	protocols = protocols_;
532		646
533	len = sizeof (*this) - sizeof (net_packet);	647	len = sizeof (*this) - sizeof (net_packet);
534	}	648	}
535	};	649	};
536		650
537	struct auth_res_packet : config_packet	651	struct auth_res_packet : vpn_packet // UNPROTECTED
538	{	652	{
539	rsaid id;
540	u8 pad1, pad2, pad3;
541	u8 response_len; // encrypted length
542	rsaresponse response;	653	auth_response response;
543		654
544	auth_res_packet (int dst)	655	auth_res_packet (int dst)
545	{	656	{
546	config_packet::setup (PT_AUTH_RES, dst);	657	set_hdr (PT_AUTH_RES, dst);
547		658
548	len = sizeof (*this) - sizeof (net_packet);	659	len = sizeof (*this) - sizeof (net_packet);
549	}	660	}
550	};	661	};
551		662
…		…
581	};	692	};
582		693
583	/////////////////////////////////////////////////////////////////////////////	694	/////////////////////////////////////////////////////////////////////////////
584		695
585	void	696	void
586	connection::connection_established ()	697	connection::connection_established (const sockinfo &rsi)
587	{	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
588	if (ictx && octx)	732	if (ictx && octx)
589	{	733	{
590	connectmode = conf->connectmode;	734	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	{	735	{
600	while (tap_packet p = (tap_packet )data_queue.get ())
601	{
602	send_data_packet (p);	736	if (p->len) send_data_packet (p);
603	delete p;	737	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	}	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	}
612	}	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 ());
613	else	755	else
614	{	756	{
615	retry_cnt = 0;	757	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
616	establish_connection.start (NOW + 5);	758	protocol = 0;
617	keepalive.stop ();
618	rekey.stop ();
619	}	759	}
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		760
632	si.set (conf, protocol);	761	si.set (conf, protocol);
		762
		763	is_direct = si.valid ();
633	}	764	}
634		765
635	// ensure sockinfo is valid, forward if necessary	766	// ensure sockinfo is valid, forward if necessary
636	const sockinfo &	767	const sockinfo &
637	connection::forward_si (const sockinfo &si) const	768	connection::forward_si (const sockinfo &si) const
638	{	769	{
639	if (!si.valid ())	770	if (!si.valid ())
640	{	771	{
641	connection *r = vpn->find_router ();	772	connection *r = vpn->find_router_for (this);
642		773
643	if (r)	774	if (r)
644	{	775	{
645	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."),
646	conf->nodename, r->conf->nodename, (const char *)r->si);	777	conf->nodename, r->conf->nodename);
647	return r->si;	778	return r->si;
648	}	779	}
649	else	780	else
650	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	781	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
651	conf->nodename);	782	conf->nodename);
652	}	783	}
653		784
654	return si;	785	return si;
655	}	786	}
…		…
665	connection::send_ping (const sockinfo &si, u8 pong)	796	connection::send_ping (const sockinfo &si, u8 pong)
666	{	797	{
667	ping_packet *pkt = new ping_packet;	798	ping_packet *pkt = new ping_packet;
668		799
669	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);
670	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	803	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
671		804
672	delete pkt;	805	delete pkt;
673	}	806	}
674		807
…		…
689	void	822	void
690	connection::send_auth_request (const sockinfo &si, bool initiate)	823	connection::send_auth_request (const sockinfo &si, bool initiate)
691	{	824	{
692	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);
693		826
694	rsachallenge chg;	827	generate_auth_data ();
695	rsa_cache.gen (pkt->id, chg);
696	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	828	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
697		829
698	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);
699
700	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
701		832
702	delete pkt;	833	delete pkt;
703	}	834	}
704		835
705	void	836	void
706	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	837	connection::send_auth_response (const sockinfo &si)
707	{	838	{
708	auth_res_packet *pkt = new auth_res_packet (conf->id);	839	auth_res_packet *pkt = new auth_res_packet (conf->id);
709		840
710	pkt->id = id;	841	auth_hash (rcv_auth, pkt->response.mac);
		842	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
711		843
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);	844	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	845	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
719		846
720	delete pkt;	847	delete pkt;
721	}	848	}
722		849
723	void	850	void
724	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	851	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
725	{	852	{
726	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	853	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
727	conf->id, rid, (const char *)rsi);	854	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		855	conf->protocols);
728		856
729	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);
730		858
731	r->hmac_set (octx);	859	r->hmac_set (octx);
732	send_vpn_packet (r, si);	860	send_vpn_packet (r, si);
733		861
734	delete r;	862	delete r;
735	}	863	}
736		864
737	void	865	inline void
738	connection::establish_connection_cb (time_watcher &w)	866	connection::establish_connection_cb (ev::timer &w, int revents)
739	{	867	{
740	if (!ictx	868	if (!(ictx && octx)
741	&& conf != THISNODE	869	&& conf != THISNODE
742	&& connectmode != conf_node::C_NEVER	870	&& connectmode != conf_node::C_NEVER
743	&& connectmode != conf_node::C_DISABLED	871	&& connectmode != conf_node::C_DISABLED
744	&& NOW > w.at)	872	&& !w.is_active ())
745	{	873	{
746	w.at = TSTAMP_MAX; // first disable this watcher in case of recursion	874	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		875	// and stop trying. should probably be handled by a per-connection expire handler.
		876	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		877	{
		878	reset_connection ();
		879	return;
		880	}
747		881
748	double retry_int = double (retry_cnt & 3	882	last_establish_attempt = ev_now ();
		883
		884	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
749	? (retry_cnt & 3) + 1	885	? (retry_cnt & 3) + 1
750	: 1 << (retry_cnt >> 2));	886	: 1 << (retry_cnt >> 2));
751		887
752	reset_si ();	888	reset_si ();
753		889
754	bool slow = si.prot & PROT_SLOW;	890	bool slow = si.prot & PROT_SLOW;
755		891
756	if (si.prot && !si.host)	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);
757	vpn->send_connect_request (conf->id);	896	vpn->send_connect_request (this);
		897	}
758	else	898	else
759	{	899	{
		900	if (si.valid ())
		901	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		902	conf->nodename, (const char *)si);
		903
760	const sockinfo &dsi = forward_si (si);	904	const sockinfo &dsi = forward_si (si);
761		905
762	slow = slow \|\| (dsi.prot & PROT_SLOW);	906	slow = slow \|\| (dsi.prot & PROT_SLOW);
763		907
764	if (dsi.valid () && auth_rate_limiter.can (dsi))	908	if (dsi.valid () && auth_rate_limiter.can (dsi))
…		…
768	else	912	else
769	send_ping (dsi, 0);	913	send_ping (dsi, 0);
770	}	914	}
771	}	915	}
772		916
773	retry_int *= slow ? 8. : 0.7;	917	retry_int *= slow ? 8. : 0.9;
774		918
775	if (retry_int < conf->max_retry)	919	if (retry_int < conf->max_retry)
776	retry_cnt++;	920	retry_cnt++;
777	else	921	else
778	retry_int = conf->max_retry;	922	retry_int = conf->max_retry;
779		923
780	w.start (NOW + retry_int);	924	w.start (retry_int);
781	}	925	}
782	}	926	}
783		927
784	void	928	void
785	connection::reset_connection ()	929	connection::reset_connection ()
…		…
788	{	932	{
789	slog (L_INFO, _("%s(%s): connection lost"),	933	slog (L_INFO, _("%s(%s): connection lost"),
790	conf->nodename, (const char *)si);	934	conf->nodename, (const char *)si);
791		935
792	if (::conf.script_node_down)	936	if (::conf.script_node_down)
793	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	}
794	}	942	}
795		943
796	delete ictx; ictx = 0;	944	delete ictx; ictx = 0;
797	delete octx; octx = 0;	945	delete octx; octx = 0;
798	#if ENABLE_DNS
799	dnsv4_reset_connection ();
800	#endif
801		946
802	si.host = 0;	947	si.host = 0;
803		948
		949	have_snd_auth = false;
		950	have_rcv_auth = false;
		951	auth_expire = 0.;
		952
804	last_activity = 0;	953	last_activity = 0.;
		954	//last_si_change = 0.;
805	retry_cnt = 0;	955	retry_cnt = 0;
806		956
807	rekey.stop ();	957	rekey.stop ();
808	keepalive.stop ();	958	keepalive.stop ();
809	establish_connection.stop ();	959	establish_connection.stop ();
…		…
816	send_reset (si);	966	send_reset (si);
817		967
818	reset_connection ();	968	reset_connection ();
819	}	969	}
820		970
821	void	971	// poor-man's rekeying
822	connection::rekey_cb (time_watcher &w)	972	inline void
		973	connection::rekey_cb (ev::timer &w, int revents)
823	{	974	{
824	reset_connection ();	975	reset_connection ();
825	establish_connection ();	976	establish_connection ();
826	}	977	}
827		978
…		…
843	if (oseqno > MAX_SEQNO)	994	if (oseqno > MAX_SEQNO)
844	rekey ();	995	rekey ();
845	}	996	}
846		997
847	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
848	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1009	connection::inject_data_packet (tap_packet *pkt)
849	{	1010	{
850	if (ictx && octx)	1011	if (ictx && octx)
851	send_data_packet (pkt);	1012	send_data_packet (pkt);
852	else	1013	else
853	{	1014	{
854	if (!broadcast)//DDDD
855	data_queue.put (new tap_packet (*pkt));	1015	data_queue.put (new tap_packet (*pkt));
856		1016	post_inject_queue ();
857	establish_connection ();
858	}	1017	}
859	}	1018	}
860		1019
		1020	void
861	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1021	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
862	{	1022	{
863	if (ictx && octx)	1023	if (ictx && octx)
864	send_vpn_packet (pkt, si, tos);	1024	send_vpn_packet (pkt, si, tos);
865	else	1025	else
866	{	1026	{
867	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1027	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
868		1028	post_inject_queue ();
869	establish_connection ();
870	}	1029	}
871	}	1030	}
872		1031
873	void	1032	void
874	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1033	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
875	{	1034	{
876	last_activity = NOW;	1035	last_activity = ev_now ();
877		1036
878	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.",
879	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;
880		1042
881	switch (pkt->typ ())	1043	switch (pkt->typ ())
882	{	1044	{
883	case vpn_packet::PT_PING:	1045	case vpn_packet::PT_PING:
		1046	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1047
884	// we send pings instead of auth packets after some retries,	1048	// we send pings instead of auth packets after some retries,
885	// so reset the retry counter and establish a connection	1049	// so reset the retry counter and establish a connection
886	// when we receive a ping.	1050	// when we receive a ping.
887	if (!ictx)	1051	if (!ictx)
888	{	1052	{
889	if (auth_rate_limiter.can (rsi))	1053	if (auth_rate_limiter.can (rsi))
890	send_auth_request (rsi, true);	1054	send_auth_request (rsi, true);
891	}	1055	}
892	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.
893	send_ping (rsi, 1); // pong	1059	send_ping (rsi, 1); // pong
894		1060
895	break;	1061	break;
896		1062
897	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 ();
898	break;	1069	break;
899		1070
900	case vpn_packet::PT_RESET:	1071	case vpn_packet::PT_RESET:
901	{	1072	{
902	reset_connection ();	1073	reset_connection ();
903		1074
904	config_packet p = (config_packet ) pkt;	1075	config_packet p = (config_packet ) pkt;
905		1076
906	if (!p->chk_config ())	1077	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 ();	1078	establish_connection ();
914	}	1079	}
915	break;	1080	break;
916		1081
917	case vpn_packet::PT_AUTH_REQ:	1082	case vpn_packet::PT_AUTH_REQ:
918	if (auth_rate_limiter.can (rsi))	1083	if (auth_rate_limiter.can (rsi))
919	{	1084	{
920	auth_req_packet p = (auth_req_packet ) pkt;	1085	auth_req_packet p = (auth_req_packet )pkt;
921		1086
922	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);
923		1090
924	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))
925	{	1097	{
926	if (p->prot_minor != PROTOCOL_MINOR)	1098	if (p->prot_minor != PROTOCOL_MINOR)
927	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."),
928	conf->nodename, (const char *)rsi,	1100	conf->nodename, (const char *)rsi,
929	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1101	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
930		1102
931	if (p->initiate)	1103	if (p->initiate)
932	send_auth_request (rsi, false);	1104	send_auth_request (rsi, false);
933		1105
934	rsachallenge k;	1106	auth_data auth;
935		1107
936	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1108	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
937	{	1109	{
938	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?"),
939	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));
940	break;
941	}	1112	}
942	else	1113	else
943	{	1114	{
944	delete octx;	1115	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
945		1116
946	octx = new crypto_ctx (k, 1);	1117	rcv_auth = auth;
947	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1118	have_rcv_auth = true;
948		1119
		1120	send_auth_response (rsi);
		1121
		1122	if (chg)
		1123	{
949	conf->protocols = p->protocols;	1124	conf->protocols = p->protocols;
950	features = p->features & config_packet::get_features ();	1125	features = p->features & config_packet::get_features ();
951		1126
952	send_auth_response (rsi, p->id, k);
953
954	connection_established ();	1127	connection_established (rsi);
955
956	break;	1128	}
957	}	1129	}
		1130
		1131	break;
958	}	1132	}
959	else
960	slog (L_WARN, _("%s(%s): protocol mismatch"),
961	conf->nodename, (const char *)rsi);
962		1133
963	send_reset (rsi);	1134	send_reset (rsi);
964	}	1135	}
965		1136
966	break;	1137	break;
967		1138
968	case vpn_packet::PT_AUTH_RES:	1139	case vpn_packet::PT_AUTH_RES:
969	{	1140	{
970	auth_res_packet p = (auth_res_packet ) pkt;	1141	auth_res_packet p = (auth_res_packet )pkt;
971		1142
972	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1143	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
973		1144
974	if (p->chk_config ())	1145	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
975	{	1146	{
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"),	1147	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
986	conf->nodename, (const char *)rsi);	1148	conf->nodename, (const char *)rsi);
987	break;
988	}
989	else
990	{
991	crypto_ctx *cctx = new crypto_ctx (chg, 0);
992
993	if (!p->hmac_chk (cctx))
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 ();
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	}	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;
1036	}	1159	}
1037		1160
1038	send_reset (rsi);	1161	send_reset (rsi);
1039	break;	1162	break;
1040		1163
…		…
1050	{	1173	{
1051	vpndata_packet p = (vpndata_packet )pkt;	1174	vpndata_packet p = (vpndata_packet )pkt;
1052		1175
1053	if (!p->hmac_chk (ictx))	1176	if (!p->hmac_chk (ictx))
1054	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"
1055	"could be an attack, or just corruption or a synchronization error"),	1178	"could be an attack, or just corruption or a synchronization error."),
1056	conf->nodename, (const char *)rsi);	1179	conf->nodename, (const char *)rsi);
1057	else	1180	else
1058	{	1181	{
1059	u32 seqno;	1182	u32 seqno;
1060	tap_packet *d = p->unpack (this, seqno);	1183	tap_packet *d = p->unpack (this, seqno);
		1184	int seqclass = iseqno.seqno_classify (seqno);
1061		1185
1062	if (iseqno.recv_ok (seqno))	1186	if (seqclass == 0) // ok
1063	{	1187	{
1064	vpn->tap->send (d);	1188	vpn->tap->send (d);
1065		1189
1066	if (si != rsi)	1190	if (si != rsi)
1067	{	1191	{
1068	// 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.)
1069	si = rsi;	1194	// {
1070
1071	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1195	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1072	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);
1073	}	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);
1074	}	1224	}
1075		1225
1076	delete d;	1226	delete d;
1077	break;	1227	break;
1078	}	1228	}
…		…
1082	break;	1232	break;
1083		1233
1084	case vpn_packet::PT_CONNECT_REQ:	1234	case vpn_packet::PT_CONNECT_REQ:
1085	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1235	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1086	{	1236	{
1087	connect_req_packet p = (connect_req_packet ) pkt;	1237	connect_req_packet p = (connect_req_packet )pkt;
1088		1238
1089	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 ())
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	{	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	{
1098	// send connect_info packets to both sides, in case one is	1251	// send connect_info packets to both sides, in case one is
1099	// behind a nat firewall (or both ;)	1252	// behind a nat firewall (or both ;)
1100	c->send_connect_info (conf->id, si, conf->protocols);	1253	c->send_connect_info (conf->id, si, conf->protocols);
1101	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 ();
1102	}	1258	}
1103	else	1259	else
1104	c->establish_connection ();	1260	slog (L_WARN,
		1261	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1262	p->id);
1105	}	1263	}
1106		1264
1107	break;	1265	break;
1108		1266
1109	case vpn_packet::PT_CONNECT_INFO:	1267	case vpn_packet::PT_CONNECT_INFO:
1110	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1268	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1111	{	1269	{
1112	connect_info_packet p = (connect_info_packet )pkt;	1270	connect_info_packet p = (connect_info_packet )pkt;
1113		1271
1114	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 ())
1115	{	1273	{
1116	connection *c = vpn->conns[p->id - 1];	1274	connection *c = vpn->conns[p->id - 1];
1117		1275
1118	c->conf->protocols = p->protocols;	1276	c->conf->protocols = p->protocols;
1119	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));
1120	p->si.upgrade_protocol (protocol, c->conf);	1278	p->si.upgrade_protocol (protocol, c->conf);
1121		1279
1122	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]",
1123	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);
1124		1288
1125	const sockinfo &dsi = forward_si (p->si);	1289	const sockinfo &dsi = forward_si (p->si);
1126		1290
1127	if (dsi.valid ())	1291	if (dsi.valid ())
1128	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);
1129	}	1297	}
		1298	else
		1299	slog (L_WARN,
		1300	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1301	p->id);
1130	}	1302	}
1131		1303
1132	break;	1304	break;
1133		1305
1134	default:	1306	default:
1135	send_reset (rsi);	1307	send_reset (rsi);
1136	break;	1308	break;
1137	}	1309	}
1138	}	1310	}
1139		1311
1140	void connection::keepalive_cb (time_watcher &w)	1312	inline void
		1313	connection::keepalive_cb (ev::timer &w, int revents)
1141	{	1314	{
1142	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)
1143	{	1320	{
1144	reset_connection ();	1321	reset_connection ();
1145	establish_connection ();	1322	establish_connection ();
1146	}	1323	}
1147	else if (NOW < last_activity + ::conf.keepalive)
1148	w.start (last_activity + ::conf.keepalive);
1149	else if (conf->connectmode != conf_node::C_ONDEMAND	1324	else if (conf->connectmode != conf_node::C_ONDEMAND
1150	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1325	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1151	{	1326	{
		1327	w.start (3);
1152	send_ping (si);	1328	send_ping (si);
1153	w.start (NOW + 5);
1154	}	1329	}
1155	else if (NOW < last_activity + ::conf.keepalive + 10)	1330	else if (when >= -10)
1156	// hold ondemand connections implicitly a few seconds longer	1331	// hold ondemand connections implicitly a few seconds longer
1157	// should delete octx, though, or something like that ;)	1332	// should delete octx, though, or something like that ;)
1158	w.start (last_activity + ::conf.keepalive + 10);	1333	w.start (when + 10);
1159	else	1334	else
1160	reset_connection ();	1335	reset_connection ();
1161	}	1336	}
1162		1337
		1338	void
1163	void connection::send_connect_request (int id)	1339	connection::send_connect_request (int id)
1164	{	1340	{
1165	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);
1166		1342
1167	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);
1168	p->hmac_set (octx);	1346	p->hmac_set (octx);
1169	send_vpn_packet (p, si);	1347	send_vpn_packet (p, si);
1170		1348
1171	delete p;	1349	delete p;
1172	}	1350	}
1173		1351
1174	void connection::script_node ()	1352	void
		1353	connection::script_init_env (const char *ext)
1175	{	1354	{
1176	vpn->script_if_up ();
1177
1178	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;
1179	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);
1180	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1371	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1181	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1372	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1182	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1373	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1183	}	1374	}
1184		1375
		1376	inline const char *
1185	const char *connection::script_node_up ()	1377	connection::script_node_up ()
1186	{	1378	{
1187	script_node ();	1379	script_init_connect_env ();
1188		1380
1189	putenv ("STATE=up");	1381	putenv ((char *)"STATE=up");
1190		1382
		1383	char *filename;
		1384	asprintf (&filename,
		1385	"%s/%s",
		1386	confbase,
1191	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1387	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1192	}
1193		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 *
1194	const char *connection::script_node_down ()	1409	connection::script_node_down ()
1195	{	1410	{
1196	script_node ();	1411	script_init_connect_env ();
1197		1412
1198	putenv ("STATE=down");	1413	putenv ((char *)"STATE=down");
1199		1414
1200	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;
1201	}	1422	}
1202		1423
1203	connection::connection (struct vpn vpn, conf_node conf)	1424	connection::connection (struct vpn vpn, conf_node conf)
1204	: vpn(vpn), conf(conf)	1425	: 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	1426	#if ENABLE_DNS
1209	, dns (0)	1427	dns (0),
1210	#endif	1428	#endif
		1429	data_queue(conf->max_ttl, conf->max_queue + 1),
		1430	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1211	{	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.;
1212	octx = ictx = 0;	1437	octx = ictx = 0;
1213	retry_cnt = 0;
1214		1438
1215	if (!conf->protocols) // make sure some protocol is enabled	1439	connectmode = conf->connectmode;
1216	conf->protocols = PROT_UDPv4;
1217		1440
1218	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
1219	reset_connection ();	1445	reset_connection ();
1220	}	1446	}
1221		1447
1222	connection::~connection ()	1448	connection::~connection ()
1223	{	1449	{
1224	shutdown ();	1450	shutdown ();
1225	}	1451	}
1226		1452
		1453	void
1227	void connection_init ()	1454	connection_init ()
1228	{	1455	{
1229	auth_rate_limiter.clear ();	1456	auth_rate_limiter.clear ();
1230	reset_rate_limiter.clear ();	1457	reset_rate_limiter.clear ();
1231	}	1458	}
1232		1459

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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 1.103 by root, Thu Jul 18 17:35:10 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 1.103 by root, Thu Jul 18 17:35:10 2013 UTC