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

Comparing gvpe/src/connection.C (file contents):
Revision 1.37 by pcg, Fri Jun 11 15:56:34 2004 UTC vs.
Revision 1.112 by root, Fri Sep 12 10:40:43 2014 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
		5	This file is part of GVPE.
		6
5	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
6	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
7	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
8	(at your option) any later version.	10	option) any later version.
9		11
10	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
11	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13	GNU General Public License for more details.	15	Public License for more details.
14		16
15	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
16	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
17	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
18	*/	30	*/
19		31
20	#include "config.h"	32	#include "config.h"
21		33
22	#include <cassert>
23
24	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
25		37
		38	#include <openssl/opensslv.h>
26	#include <openssl/rand.h>	39	#include <openssl/rand.h>
27	#include <openssl/evp.h>	40	#include <openssl/evp.h>
28	#include <openssl/rsa.h>	41	#include <openssl/rsa.h>
29	#include <openssl/err.h>	42	#include <openssl/err.h>
30		43
31	#include "gettext.h"	44	// openssl 0.9.8 compatibility
		45	#if OPENSSL_VERSION_NUMBER < 0x10100000
		46	#define require101(exp) exp
		47	#else
		48	#define require101(exp) require (exp)
		49	#endif
32		50
33	#include "conf.h"	51	#include "conf.h"
34	#include "slog.h"	52	#include "slog.h"
35	#include "device.h"	53	#include "device.h"
36	#include "vpn.h"	54	#include "vpn.h"
37	#include "connection.h"	55	#include "connection.h"
		56	#include "hkdf.h"
38		57
39	#include "netcompat.h"	58	#include "netcompat.h"
40		59
41	#if !HAVE_RAND_PSEUDO_BYTES
42	# define RAND_pseudo_bytes RAND_bytes
43	#endif
44
45	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	60	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
46		61
47	#define ULTRA_FAST 1	62	#define ULTRA_FAST 1
48	#define HLOG 15	63	#define HLOG 15
49	#include "lzf/lzf.h"	64	#include "lzf/lzf.h"
50	#include "lzf/lzf_c.c"	65	#include "lzf/lzf_c.c"
51	#include "lzf/lzf_d.c"	66	#include "lzf/lzf_d.c"
52		67
		68	//////////////////////////////////////////////////////////////////////////////
		69
		70	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		71	static ev::child rs_child_ev;
		72
		73	namespace
		74	{
		75	void // c++ requires external linkage here, apparently :(
		76	rs_child_cb (ev::child &w, int revents)
		77	{
		78	w.stop ();
		79
		80	if (rs_queue.empty ())
		81	return;
		82
		83	pid_t pid = run_script (*rs_queue.front ().first, false);
		84	if (pid)
		85	{
		86	w.set (pid);
		87	w.start ();
		88	}
		89	else
		90	slog (L_WARN, rs_queue.front ().second);
		91
		92	delete rs_queue.front ().first;
		93	rs_queue.pop ();
		94	}
		95	};
		96
		97	// despite the fancy name, this is quite a hack
		98	static void
		99	run_script_queued (run_script_cb cb, const char warnmsg)
		100	{
		101	rs_queue.push (std::make_pair (cb, warnmsg));
		102
		103	if (!rs_child_ev.is_active ())
		104	{
		105	rs_child_ev.set<rs_child_cb> ();
		106	rs_child_ev ();
		107	}
		108	}
		109
		110	//////////////////////////////////////////////////////////////////////////////
		111
53	struct crypto_ctx	112	struct crypto_ctx
54	{	113	{
55	EVP_CIPHER_CTX cctx;	114	EVP_CIPHER_CTX cctx;
56	HMAC_CTX hctx;	115	HMAC_CTX hctx;
57		116
58	crypto_ctx (const rsachallenge &challenge, int enc);	117	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
59	~crypto_ctx ();	118	~crypto_ctx ();
60	};	119	};
61		120
62	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	121	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
63	{	122	{
		123	ecdh_key s;
		124
		125	curve25519_combine (a, b, s);
		126
		127	{
		128	u8 mac_key[MAC_KEYSIZE];
		129	static const unsigned char mac_info[] = "gvpe mac key";
		130
		131	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		132	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		133	kdf.extract (s, sizeof (s));
		134	kdf.extract_done (HKDF_PRF_HASH ());
		135	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		136
		137	HMAC_CTX_init (&hctx);
		138	require101 (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		139	}
		140
		141	{
		142	u8 cipher_key[CIPHER_KEYSIZE];
		143	static const unsigned char cipher_info[] = "gvpe cipher key";
		144
		145	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		146	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		147	kdf.extract (s, sizeof (s));
		148	kdf.extract_done (HKDF_PRF_HASH ());
		149	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		150
64	EVP_CIPHER_CTX_init (&cctx);	151	EVP_CIPHER_CTX_init (&cctx);
65	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	152	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
66	HMAC_CTX_init (&hctx);	153	}
67	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
68	}	154	}
69		155
70	crypto_ctx::~crypto_ctx ()	156	crypto_ctx::~crypto_ctx ()
71	{	157	{
72	require (EVP_CIPHER_CTX_cleanup (&cctx));	158	require (EVP_CIPHER_CTX_cleanup (&cctx));
73	HMAC_CTX_cleanup (&hctx);	159	HMAC_CTX_cleanup (&hctx);
74	}	160	}
75		161
		162	static inline void
		163	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		164	{
		165	if (RSA_public_encrypt (sizeof (auth.rsa),
		166	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		167	key, RSA_PKCS1_OAEP_PADDING) < 0)
		168	fatal ("RSA_public_encrypt error");
		169
		170	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		171	}
		172
		173	static inline bool
		174	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		175	{
		176	u8 rsa_decrypt[RSA_KEYLEN];
		177
		178	if (RSA_private_decrypt (sizeof (encr.rsa),
		179	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		180	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		181	return 0;
		182
		183	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		184	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		185
		186	return 1;
		187	}
		188
76	static void	189	static void
77	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	190	auth_hash (const auth_data &auth, const ecdh_key &b, auth_mac &mac)
78	{	191	{
79	EVP_MD_CTX ctx;	192	hkdf kdf (b, sizeof b, AUTH_DIGEST ()); // use response ecdh b as salt
80		193	kdf.extract (&auth.rsa, sizeof (auth.rsa));
81	EVP_MD_CTX_init (&ctx);	194	kdf.extract_done ();
82	require (EVP_DigestInit (&ctx, RSA_HASH));	195	kdf.expand (mac, sizeof mac, auth.ecdh, sizeof (auth.ecdh)); // use challenge ecdh b as info
83	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));
84	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
85	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
86	EVP_MD_CTX_cleanup (&ctx);
87	}	196	}
88		197
89	struct rsa_entry {	198	void
90	tstamp expire;	199	connection::generate_auth_data ()
91	rsaid id;
92	rsachallenge chg;
93	};
94
95	struct rsa_cache : list<rsa_entry>
96	{	200	{
97	void cleaner_cb (time_watcher &w); time_watcher cleaner;	201	if (auth_expire < ev_now ())
98
99	bool find (const rsaid &id, rsachallenge &chg)
100	{
101	for (iterator i = begin (); i != end (); ++i)
102	{
103	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)
104	{
105	memcpy (&chg, &i->chg, sizeof chg);
106
107	erase (i);
108	return true;
109	}
110	}
111
112	if (cleaner.at < NOW)
113	cleaner.start (NOW + RSA_TTL);
114
115	return false;
116	}
117
118	void gen (rsaid &id, rsachallenge &chg)
119	{
120	rsa_entry e;
121
122	RAND_bytes ((unsigned char *)&id, sizeof id);
123	RAND_bytes ((unsigned char *)&chg, sizeof chg);
124
125	e.expire = NOW + RSA_TTL;
126	e.id = id;
127	memcpy (&e.chg, &chg, sizeof chg);
128
129	push_back (e);
130
131	if (cleaner.at < NOW)
132	cleaner.start (NOW + RSA_TTL);
133	}
134
135	rsa_cache ()
136	: cleaner (this, &rsa_cache::cleaner_cb)
137	{ }	202	{
		203	// request data
		204	rand_fill (snd_auth.rsa);
		205	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
138		206
139	} rsa_cache;	207	// eventual response data
140		208	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
141	void rsa_cache::cleaner_cb (time_watcher &w)
142	{
143	if (!empty ())
144	{	209	}
145	w.start (NOW + RSA_TTL);
146		210
147	for (iterator i = begin (); i != end (); )	211	// every use prolongs the expiry
148	if (i->expire <= NOW)	212	auth_expire = ev_now () + AUTH_TTL;
149	i = erase (i);
150	else
151	++i;
152	}
153	}	213	}
154		214
155	//////////////////////////////////////////////////////////////////////////////	215	//////////////////////////////////////////////////////////////////////////////
156		216
157	void pkt_queue::put (net_packet *p)	217	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		218	: max_ttl (max_ttl), max_queue (max_queue)
158	{	219	{
159	if (queue[i])	220	queue = new pkt [max_queue];
160	{
161	delete queue[i];
162	j = (j + 1) % QUEUEDEPTH;
163	}
164		221
165	queue[i] = p;
166
167	i = (i + 1) % QUEUEDEPTH;
168	}
169
170	net_packet *pkt_queue::get ()
171	{
172	net_packet *p = queue[j];
173
174	if (p)
175	{
176	queue[j] = 0;
177	j = (j + 1) % QUEUEDEPTH;
178	}
179
180	return p;
181	}
182
183	pkt_queue::pkt_queue ()
184	{
185	memset (queue, 0, sizeof (queue));
186	i = 0;	222	i = 0;
187	j = 0;	223	j = 0;
		224
		225	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
188	}	226	}
189		227
190	pkt_queue::~pkt_queue ()	228	pkt_queue::~pkt_queue ()
191	{	229	{
192	for (i = QUEUEDEPTH; --i > 0; )	230	while (net_packet *p = get ())
		231	delete p;
		232
193	delete queue[i];	233	delete [] queue;
194	}	234	}
195		235
		236	void
		237	pkt_queue::expire_cb (ev::timer &w, int revents)
		238	{
		239	ev_tstamp expire = ev_now () - max_ttl;
		240
		241	for (;;)
		242	{
		243	if (empty ())
		244	break;
		245
		246	double diff = queue[j].tstamp - expire;
		247
		248	if (diff >= 0.)
		249	{
		250	w.start (diff > 0.5 ? diff : 0.5);
		251	break;
		252	}
		253
		254	delete get ();
		255	}
		256	}
		257
		258	void
		259	pkt_queue::put (net_packet *p)
		260	{
		261	ev_tstamp now = ev_now ();
		262
		263	// start expiry timer
		264	if (empty ())
		265	expire.start (max_ttl);
		266
		267	int ni = i + 1 == max_queue ? 0 : i + 1;
		268
		269	if (ni == j)
		270	delete get ();
		271
		272	queue[i].pkt = p;
		273	queue[i].tstamp = now;
		274
		275	i = ni;
		276	}
		277
		278	net_packet *
		279	pkt_queue::get ()
		280	{
		281	if (empty ())
		282	return 0;
		283
		284	net_packet *p = queue[j].pkt;
		285	queue[j].pkt = 0;
		286
		287	j = j + 1 == max_queue ? 0 : j + 1;
		288
		289	return p;
		290	}
		291
196	struct net_rateinfo {	292	struct net_rateinfo
		293	{
197	u32 host;	294	u32 host;
198	double pcnt, diff;	295	double pcnt, diff;
199	tstamp last;	296	tstamp last;
200	};	297	};
201		298
211		308
212	bool can (const sockinfo &si) { return can((u32)si.host); }	309	bool can (const sockinfo &si) { return can((u32)si.host); }
213	bool can (u32 host);	310	bool can (u32 host);
214	};	311	};
215		312
216	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	313	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
217		314
		315	bool
218	bool net_rate_limiter::can (u32 host)	316	net_rate_limiter::can (u32 host)
219	{	317	{
220	iterator i;	318	iterator i;
221		319
222	for (i = begin (); i != end (); )	320	for (i = begin (); i != end (); )
223	if (i->host == host)	321	if (i->host == host)
224	break;	322	break;
225	else if (i->last < NOW - NRL_EXPIRE)	323	else if (i->last < ev_now () - NRL_EXPIRE)
226	i = erase (i);	324	i = erase (i);
227	else	325	else
228	i++;	326	i++;
229		327
230	if (i == end ())	328	if (i == end ())
…		…
232	net_rateinfo ri;	330	net_rateinfo ri;
233		331
234	ri.host = host;	332	ri.host = host;
235	ri.pcnt = 1.;	333	ri.pcnt = 1.;
236	ri.diff = NRL_MAXDIF;	334	ri.diff = NRL_MAXDIF;
237	ri.last = NOW;	335	ri.last = ev_now ();
238		336
239	push_front (ri);	337	push_front (ri);
240		338
241	return true;	339	return true;
242	}	340	}
…		…
244	{	342	{
245	net_rateinfo ri (*i);	343	net_rateinfo ri (*i);
246	erase (i);	344	erase (i);
247		345
248	ri.pcnt = ri.pcnt * NRL_ALPHA;	346	ri.pcnt = ri.pcnt * NRL_ALPHA;
249	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	347	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
250		348
251	ri.last = NOW;	349	ri.last = ev_now ();
252		350
253	double dif = ri.diff / ri.pcnt;	351	double dif = ri.diff / ri.pcnt;
254		352
255	bool send = dif > NRL_CUTOFF;	353	bool send = dif > NRL_CUTOFF;
256		354
…		…
268	}	366	}
269	}	367	}
270		368
271	/////////////////////////////////////////////////////////////////////////////	369	/////////////////////////////////////////////////////////////////////////////
272		370
273	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	371	void
274
275	void hmac_packet::hmac_gen (crypto_ctx *ctx)	372	hmac_packet::hmac_gen (crypto_ctx ctx, u8 hmac_digest)
276	{	373	{
277	unsigned int xlen;
278
279	HMAC_CTX *hctx = &ctx->hctx;	374	HMAC_CTX *hctx = &ctx->hctx;
280		375
281	HMAC_Init_ex (hctx, 0, 0, 0, 0);	376	require101 (HMAC_Init_ex (hctx, 0, 0, 0, 0));
282	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	377	require101 (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), len - sizeof (hmac_packet)));
283	len - sizeof (hmac_packet));	378	require101 (HMAC_Final (hctx, hmac_digest, 0));
284	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);
285	}	379	}
286		380
287	void	381	void
288	hmac_packet::hmac_set (crypto_ctx *ctx)	382	hmac_packet::hmac_set (crypto_ctx *ctx)
289	{	383	{
290	hmac_gen (ctx);	384	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
291		385	hmac_gen (ctx, hmac_digest);
292	memcpy (hmac, hmac_digest, HMACLENGTH);	386	memcpy (hmac, hmac_digest, HMACLENGTH);
293	}	387	}
294		388
295	bool	389	bool
296	hmac_packet::hmac_chk (crypto_ctx *ctx)	390	hmac_packet::hmac_chk (crypto_ctx *ctx)
297	{	391	{
298	hmac_gen (ctx);	392	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
299		393	hmac_gen (ctx, hmac_digest);
300	return !memcmp (hmac, hmac_digest, HMACLENGTH);	394	return slow_memeq (hmac, hmac_digest, HMACLENGTH);
301	}	395	}
302		396
		397	void
303	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	398	vpn_packet::set_hdr (ptype type_, unsigned int dst)
304	{	399	{
305	type = type_;	400	type = type_;
306		401
307	int src = THISNODE->id;	402	int src = THISNODE->id;
308		403
…		…
313		408
314	#define MAXVPNDATA (MAX_MTU - 6 - 6)	409	#define MAXVPNDATA (MAX_MTU - 6 - 6)
315	#define DATAHDR (sizeof (u32) + RAND_SIZE)	410	#define DATAHDR (sizeof (u32) + RAND_SIZE)
316		411
317	struct vpndata_packet : vpn_packet	412	struct vpndata_packet : vpn_packet
		413	{
		414	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		415
		416	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		417	tap_packet unpack (connection conn, u32 &seqno);
		418
		419	private:
		420	const u32 data_hdr_size () const
318	{	421	{
319	u8 data[MAXVPNDATA + DATAHDR]; // seqno
320
321	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
322	tap_packet unpack (connection conn, u32 &seqno);
323	private:
324
325	const u32 data_hdr_size () const
326	{
327	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	422	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
328	}
329	};	423	}
		424	};
330		425
331	void	426	void
332	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	427	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
333	{	428	{
334	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	429	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
336	ptype type = PT_DATA_UNCOMPRESSED;	431	ptype type = PT_DATA_UNCOMPRESSED;
337		432
338	#if ENABLE_COMPRESSION	433	#if ENABLE_COMPRESSION
339	u8 cdata[MAX_MTU];	434	u8 cdata[MAX_MTU];
340		435
341	if (conn->features & ENABLE_COMPRESSION)	436	if (conn->features & FEATURE_COMPRESSION)
342	{	437	{
343	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	438	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
344		439
345	if (cl)	440	if (cl)
346	{	441	{
…		…
352	d[1] = cl;	447	d[1] = cl;
353	}	448	}
354	}	449	}
355	#endif	450	#endif
356		451
357	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	452	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
358		453
359	struct {	454	struct {
360	#if RAND_SIZE	455	#if RAND_SIZE
361	u8 rnd[RAND_SIZE];	456	u8 rnd[RAND_SIZE];
362	#endif	457	#endif
363	u32 seqno;	458	u32 seqno;
364	} datahdr;	459	} datahdr;
365		460
366	datahdr.seqno = ntohl (seqno);	461	datahdr.seqno = ntohl (seqno);
367	#if RAND_SIZE	462	#if RAND_SIZE
368	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	463	// NB: a constant (per session) random prefix
		464	// is likely enough, but we don't take any chances.
		465	conn->oiv.get (datahdr.rnd, RAND_SIZE);
369	#endif	466	#endif
370		467
371	require (EVP_EncryptUpdate (cctx,	468	require (EVP_EncryptUpdate (cctx,
372	(unsigned char *) data + outl, &outl2,	469	(unsigned char *) data + outl, &outl2,
373	(unsigned char *) &datahdr, DATAHDR));	470	(unsigned char *) &datahdr, DATAHDR));
…		…
395	int outl = 0, outl2;	492	int outl = 0, outl2;
396	tap_packet *p = new tap_packet;	493	tap_packet *p = new tap_packet;
397	u8 *d;	494	u8 *d;
398	u32 l = len - data_hdr_size ();	495	u32 l = len - data_hdr_size ();
399		496
400	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	497	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
401		498
402	#if ENABLE_COMPRESSION	499	#if ENABLE_COMPRESSION
403	u8 cdata[MAX_MTU];	500	u8 cdata[MAX_MTU];
404		501
405	if (type == PT_DATA_COMPRESSED)	502	if (type == PT_DATA_COMPRESSED)
406	d = cdata;	503	d = cdata;
407	else	504	else
408	#endif	505	#endif
409	d = &(*p)[6 + 6 - DATAHDR];	506	d = &(*p)[6 + 6] - DATAHDR;
410		507
411	/* this overwrites part of the src mac, but we fix that later */	508	// we play do evil games with the struct layout atm.
		509	// pending better solutions, we at least do some verification.
		510	// this is fine, as we left ISO territory long ago.
		511	require (DATAHDR <= 16);
		512	require ((u8 )(&p->len + 1) == &(p)[0]);
		513
		514	// this can overwrite the len/dst/src fields
412	require (EVP_DecryptUpdate (cctx,	515	require (EVP_DecryptUpdate (cctx,
413	d, &outl2,	516	d, &outl2,
414	(unsigned char *)&data, len - data_hdr_size ()));	517	(unsigned char *)&data, len - data_hdr_size ()));
415	outl += outl2;	518	outl += outl2;
416		519
…		…
447	}	550	}
448	};	551	};
449		552
450	struct config_packet : vpn_packet	553	struct config_packet : vpn_packet
451	{	554	{
452	// actually, hmaclen cannot be checked because the hmac	555	u8 serial[SERIAL_SIZE];
453	// field comes before this data, so peers with other
454	// hmacs simply will not work.
455	u8 prot_major, prot_minor, randsize, hmaclen;	556	u8 prot_major, prot_minor, randsize;
456	u8 flags, challengelen, features, pad3;	557	u8 flags, features, pad6, pad7, pad8;
457	u32 cipher_nid, digest_nid, hmac_nid;	558	u32 cipher_nid, mac_nid, auth_nid;
458		559
459	void setup (ptype type, int dst);	560	void setup (ptype type, int dst);
460	bool chk_config () const;	561	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
461		562
462	static u8 get_features ()	563	static u8 get_features ()
463	{	564	{
464	u8 f = 0;	565	u8 f = 0;
465	#if ENABLE_COMPRESSION	566	#if ENABLE_COMPRESSION
466	f \|= FEATURE_COMPRESSION;	567	f \|= FEATURE_COMPRESSION;
467	#endif	568	#endif
468	#if ENABLE_ROHC	569	#if ENABLE_ROHC
469	f \|= FEATURE_ROHC;	570	f \|= FEATURE_ROHC;
470	#endif	571	#endif
		572	#if ENABLE_BRIDGING
		573	f \|= FEATURE_BRIDGING;
		574	#endif
471	return f;	575	return f;
472	}	576	}
473	};	577	};
474		578
		579	void
475	void config_packet::setup (ptype type, int dst)	580	config_packet::setup (ptype type, int dst)
476	{	581	{
477	prot_major = PROTOCOL_MAJOR;	582	prot_major = PROTOCOL_MAJOR;
478	prot_minor = PROTOCOL_MINOR;	583	prot_minor = PROTOCOL_MINOR;
479	randsize = RAND_SIZE;	584	randsize = RAND_SIZE;
480	hmaclen = HMACLENGTH;	585	flags = 0;
481	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
482	challengelen = sizeof (rsachallenge);
483	features = get_features ();	586	features = get_features ();
484		587
		588	strncpy ((char *)serial, conf.serial, sizeof (serial));
		589
485	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	590	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
486	digest_nid = htonl (EVP_MD_type (RSA_HASH));
487	hmac_nid = htonl (EVP_MD_type (DIGEST));	591	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		592	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
488		593
489	len = sizeof (*this) - sizeof (net_packet);	594	len = sizeof (*this) - sizeof (net_packet);
490	set_hdr (type, dst);	595	set_hdr (type, dst);
491	}	596	}
492		597
493	bool config_packet::chk_config () const	598	bool
		599	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
494	{	600	{
495	if (prot_major != PROTOCOL_MAJOR)	601	if (prot_major != PROTOCOL_MAJOR)
496	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	602	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		603	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
497	else if (randsize != RAND_SIZE)	604	else if (randsize != RAND_SIZE)
498	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	605	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
499	else if (hmaclen != HMACLENGTH)	606	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
500	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
501	#if 0 // this implementation should handle all flag settings
502	else if (flags != curflags ())
503	slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ());
504	#endif
505	else if (challengelen != sizeof (rsachallenge))
506	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
507	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	607	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
508	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	608	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
509	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	609	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
510	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
511	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	610	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
512	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	611	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		612	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		613	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		614	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		615	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
513	else	616	else
		617	{
		618	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		619
		620	if (cmp > 0)
		621	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		622	conf->nodename, (const char *)rsi);
		623	else if (cmp == 0)
514	return true;	624	return true;
		625	}
515		626
516	return false;	627	return false;
517	}	628	}
518		629
519	struct auth_req_packet : config_packet	630	struct auth_req_packet : config_packet // UNPROTECTED
520	{	631	{
521	char magic[8];	632	char magic[8];
522	u8 initiate; // false if this is just an automatic reply	633	u8 initiate; // false if this is just an automatic reply
523	u8 protocols; // supported protocols (will be patched on forward)	634	u8 protocols; // supported protocols (will be patched on forward)
524	u8 pad2, pad3;	635	u8 pad2, pad3;
525	rsaid id;	636	auth_encr encr;
526	rsaencrdata encr;
527		637
528	auth_req_packet (int dst, bool initiate_, u8 protocols_)	638	auth_req_packet (int dst, bool initiate_, u8 protocols_)
529	{	639	{
530	config_packet::setup (PT_AUTH_REQ, dst);	640	config_packet::setup (PT_AUTH_REQ, dst);
531	strncpy (magic, MAGIC, 8);	641	memcpy (magic, MAGIC, 8);
532	initiate = !!initiate_;	642	initiate = !!initiate_;
533	protocols = protocols_;	643	protocols = protocols_;
534		644
535	len = sizeof (*this) - sizeof (net_packet);	645	len = sizeof (*this) - sizeof (net_packet);
536	}	646	}
537	};	647	};
538		648
539	struct auth_res_packet : config_packet	649	struct auth_res_packet : vpn_packet // UNPROTECTED
540	{	650	{
541	rsaid id;
542	u8 pad1, pad2, pad3;
543	u8 response_len; // encrypted length
544	rsaresponse response;	651	auth_response response;
545		652
546	auth_res_packet (int dst)	653	auth_res_packet (int dst)
547	{	654	{
548	config_packet::setup (PT_AUTH_RES, dst);	655	set_hdr (PT_AUTH_RES, dst);
549		656
550	len = sizeof (*this) - sizeof (net_packet);	657	len = sizeof (*this) - sizeof (net_packet);
551	}	658	}
552	};	659	};
553		660
…		…
583	};	690	};
584		691
585	/////////////////////////////////////////////////////////////////////////////	692	/////////////////////////////////////////////////////////////////////////////
586		693
587	void	694	void
588	connection::connection_established ()	695	connection::connection_established (const sockinfo &rsi)
589	{	696	{
590	if (ictx && octx)	697	if (!have_snd_auth \|\| !have_rcv_auth)
		698	return;
		699
		700	si = rsi;
		701	protocol = rsi.prot;
		702
		703	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		704	conf->nodename, (const char *)rsi,
		705	vpn->can_direct (THISNODE, conf) ? "direct" : "forwarded",
		706	PROTOCOL_MAJOR, prot_minor);
		707
		708	if (::conf.script_node_up)
		709	{
		710	run_script_cb *cb = new run_script_cb;
		711	cb->set<connection, &connection::script_node_up> (this);
		712	run_script_queued (cb, _("node-up command execution failed, continuing."));
591	{	713	}
592	connectmode = conf->connectmode;	714
		715	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		716	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
593		717
		718	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		719	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		720
		721	oiv.reset ();
		722
594	// make sure rekeying timeouts are slightly asymmetric	723	// make sure rekeying timeouts are slightly asymmetric
595	rekey.start (NOW + ::conf.rekey	724	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
596	+ (conf->id > THISNODE->id ? 10 : 0));	725	rekey.start (rekey_interval, rekey_interval);
		726
		727	hmac_error = 0.;
		728
597	keepalive.start (NOW + ::conf.keepalive);	729	keepalive.start (::conf.keepalive);
598		730
599	// send queued packets	731	// send queued packets
600	if (ictx && octx)
601	{
602	while (tap_packet p = (tap_packet )data_queue.get ())	732	while (tap_packet p = (tap_packet )data_queue.get ())
603	{	733	{
604	send_data_packet (p);	734	if (p->len) send_data_packet (p);
605	delete p;	735	delete p;
606	}	736	}
607		737
608	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	738	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
609	{	739	{
610	send_vpn_packet (p, si, IPTOS_RELIABILITY);	740	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
611	delete p;	741	delete p;
612	}
613	}
614	}	742	}
		743
		744	vpn->connection_established (this);
		745	}
		746
		747	void
		748	connection::reset_si ()
		749	{
		750	if (vpn->can_direct (THISNODE, conf))
		751	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
615	else	752	else
616	{	753	{
617	retry_cnt = 0;	754	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
618	establish_connection.start (NOW + 5);	755	protocol = 0;
619	keepalive.stop ();
620	rekey.stop ();
621	}	756	}
622	}
623
624	void
625	connection::reset_si ()
626	{
627	protocol = best_protocol (THISNODE->protocols & conf->protocols);
628
629	// mask out protocols we cannot establish
630	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
631	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
632		757
633	si.set (conf, protocol);	758	si.set (conf, protocol);
634	}	759	}
635		760
636	// ensure sockinfo is valid, forward if necessary	761	// ensure sockinfo is valid, forward if necessary
637	const sockinfo &	762	const sockinfo &
638	connection::forward_si (const sockinfo &si) const	763	connection::forward_si (const sockinfo &si) const
639	{	764	{
640	if (!si.valid ())	765	if (!si.valid ())
641	{	766	{
642	connection *r = vpn->find_router ();	767	connection *r = vpn->find_router_for (this);
643		768
644	if (r)	769	if (r)
645	{	770	{
646	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	771	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
647	conf->nodename, r->conf->nodename);	772	conf->nodename, r->conf->nodename);
648	return r->si;	773	return r->si;
649	}	774	}
650	else	775	else
651	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	776	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
652	conf->nodename);	777	conf->nodename);
653	}	778	}
654		779
655	return si;	780	return si;
656	}	781	}
657		782
658	void	783	void
659	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	784	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
660	{	785	{
661	if (!vpn->send_vpn_packet (pkt, si, tos))	786	if (!vpn->send_vpn_packet (pkt, si, tos))
662	reset_connection ();	787	reset_connection ("packet send error");
663	}	788	}
664		789
665	void	790	void
666	connection::send_ping (const sockinfo &si, u8 pong)	791	connection::send_ping (const sockinfo &si, u8 pong)
667	{	792	{
668	ping_packet *pkt = new ping_packet;	793	ping_packet *pkt = new ping_packet;
669		794
670	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	795	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		796
		797	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
671	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	798	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
672		799
673	delete pkt;	800	delete pkt;
674	}	801	}
675		802
…		…
690	void	817	void
691	connection::send_auth_request (const sockinfo &si, bool initiate)	818	connection::send_auth_request (const sockinfo &si, bool initiate)
692	{	819	{
693	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	820	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
694		821
695	rsachallenge chg;	822	generate_auth_data ();
696	rsa_cache.gen (pkt->id, chg);
697	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	823	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
698		824
699	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	825	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
700
701	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	826	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
702		827
703	delete pkt;	828	delete pkt;
704	}	829	}
705		830
706	void	831	void
707	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	832	connection::send_auth_response (const sockinfo &si)
708	{	833	{
709	auth_res_packet *pkt = new auth_res_packet (conf->id);	834	auth_res_packet *pkt = new auth_res_packet (conf->id);
710		835
711	pkt->id = id;	836	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof rcv_ecdh_b);
		837	auth_hash (rcv_auth, rcv_ecdh_b, pkt->response.mac);
712		838
713	rsa_hash (id, chg, pkt->response);
714
715	pkt->hmac_set (octx);
716
717	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	839	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
718
719	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	840	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
720		841
721	delete pkt;	842	delete pkt;
722	}	843	}
723		844
724	void	845	void
725	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	846	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
726	{	847	{
727	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	848	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
728	conf->id, rid, (const char *)rsi);	849	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		850	conf->protocols);
729		851
730	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	852	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
731		853
732	r->hmac_set (octx);	854	r->hmac_set (octx);
733	send_vpn_packet (r, si);	855	send_vpn_packet (r, si);
734		856
735	delete r;	857	delete r;
736	}	858	}
737		859
738	void	860	inline void
739	connection::establish_connection_cb (time_watcher &w)	861	connection::establish_connection_cb (ev::timer &w, int revents)
740	{	862	{
741	if (!ictx	863	if (!(ictx && octx)
742	&& conf != THISNODE	864	&& conf != THISNODE
743	&& connectmode != conf_node::C_NEVER	865	&& connectmode != conf_node::C_NEVER
744	&& connectmode != conf_node::C_DISABLED	866	&& connectmode != conf_node::C_DISABLED
745	&& NOW > w.at)	867	&& !w.is_active ())
746	{	868	{
747	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	869	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
748		870	// and stop trying. should probably be handled by a per-connection expire handler.
749	if (retry_int < conf->max_retry)	871	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		872	{
		873	reset_connection ("no demand");
750	retry_cnt++;	874	return;
751	else	875	}
752	retry_int = conf->max_retry;
753		876
754	w.start (NOW + retry_int);	877	last_establish_attempt = ev_now ();
		878
		879	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		880	? (retry_cnt & 3) + 1
		881	: 1 << (retry_cnt >> 2));
755		882
756	reset_si ();	883	reset_si ();
757		884
758	if (si.prot && !si.host)	885	bool slow = (si.prot & PROT_SLOW) \|\| (conf->low_power \|\| THISNODE->low_power);
		886
		887	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		888	{
		889	/TODO/ /* start the timer so we don't recurse endlessly */
		890	w.start (1);
759	vpn->send_connect_request (conf->id);	891	vpn->send_connect_request (this);
		892	}
760	else	893	else
761	{	894	{
		895	if (si.valid ())
		896	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		897	conf->nodename, (const char *)si);
		898
762	const sockinfo &dsi = forward_si (si);	899	const sockinfo &dsi = forward_si (si);
		900
		901	slow = slow \|\| (dsi.prot & PROT_SLOW);
763		902
764	if (dsi.valid () && auth_rate_limiter.can (dsi))	903	if (dsi.valid () && auth_rate_limiter.can (dsi))
765	{	904	{
766	if (retry_cnt < 4)	905	// use ping after the first few retries
		906	// TODO: on rekeys, the other node might not interpret ping correctly,
		907	// TODO: as it will still have a valid connection
		908	if (retry_cnt < 4 && (!conf->low_power \|\| THISNODE->low_power))
767	send_auth_request (dsi, true);	909	send_auth_request (dsi, true);
768	else	910	else
769	send_ping (dsi, 0);	911	send_ping (dsi, 0);
770	}	912	}
771	}	913	}
772	}
773	}
774		914
		915	retry_int *= slow ? 4. : 0.9;
		916
		917	if (retry_int < conf->max_retry)
		918	retry_cnt++;
		919	else
		920	retry_int = conf->max_retry;
		921
		922	w.start (retry_int);
		923	}
		924	}
		925
775	void	926	void
776	connection::reset_connection ()	927	connection::reset_connection (const char *reason)
777	{	928	{
778	if (ictx && octx)	929	if (ictx && octx)
779	{	930	{
780	slog (L_INFO, _("%s(%s): connection lost"),	931	slog (L_INFO, _("%s(%s): connection lost (%s)"),
781	conf->nodename, (const char *)si);	932	conf->nodename, (const char *)si, reason);
782		933
783	if (::conf.script_node_down)	934	if (::conf.script_node_down)
784	run_script (run_script_cb (this, &connection::script_node_down), false);	935	{
		936	run_script_cb *cb = new run_script_cb;
		937	cb->set<connection, &connection::script_node_down> (this);
		938	run_script_queued (cb, _("node-down command execution failed, continuing."));
		939	}
785	}	940	}
786		941
787	delete ictx; ictx = 0;	942	delete ictx; ictx = 0;
788	delete octx; octx = 0;	943	delete octx; octx = 0;
789		944
790	si.host= 0;	945	si.host = 0;
791		946
		947	have_snd_auth = false;
		948	have_rcv_auth = false;
		949	auth_expire = 0.;
		950
792	last_activity = 0;	951	last_activity = 0.;
		952	//last_si_change = 0.;
793	retry_cnt = 0;	953	retry_cnt = 0;
794		954
795	rekey.stop ();	955	rekey.stop ();
796	keepalive.stop ();	956	keepalive.stop ();
797	establish_connection.stop ();	957	establish_connection.stop ();
…		…
801	connection::shutdown ()	961	connection::shutdown ()
802	{	962	{
803	if (ictx && octx)	963	if (ictx && octx)
804	send_reset (si);	964	send_reset (si);
805		965
806	reset_connection ();	966	reset_connection ("shutdown");
807	}	967	}
808		968
809	void	969	// poor-man's rekeying
810	connection::rekey_cb (time_watcher &w)	970	inline void
		971	connection::rekey_cb (ev::timer &w, int revents)
811	{	972	{
812	reset_connection ();	973	reset_connection ("rekeying");
813	establish_connection ();	974	establish_connection ();
814	}	975	}
815		976
816	void	977	void
817	connection::send_data_packet (tap_packet *pkt)	978	connection::send_data_packet (tap_packet *pkt)
…		…
831	if (oseqno > MAX_SEQNO)	992	if (oseqno > MAX_SEQNO)
832	rekey ();	993	rekey ();
833	}	994	}
834		995
835	void	996	void
		997	connection::post_inject_queue ()
		998	{
		999	// force a connection every now and when when packets are sent (max 1/s)
		1000	if (ev_now () - last_establish_attempt >= (conf->low_power \|\| THISNODE->low_power ? 2.95 : 0.95)) // arbitrary
		1001	establish_connection.stop ();
		1002
		1003	establish_connection ();
		1004	}
		1005
		1006	void
836	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1007	connection::inject_data_packet (tap_packet *pkt)
837	{	1008	{
838	if (ictx && octx)	1009	if (ictx && octx)
839	send_data_packet (pkt);	1010	send_data_packet (pkt);
840	else	1011	else
841	{	1012	{
842	if (!broadcast)//DDDD
843	data_queue.put (new tap_packet (*pkt));	1013	data_queue.put (new tap_packet (*pkt));
844		1014	post_inject_queue ();
845	establish_connection ();
846	}	1015	}
847	}	1016	}
848		1017
		1018	void
849	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1019	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
850	{	1020	{
851	if (ictx && octx)	1021	if (ictx && octx)
852	send_vpn_packet (pkt, si, tos);	1022	send_vpn_packet (pkt, si, tos);
853	else	1023	else
854	{	1024	{
855	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1025	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
856		1026	post_inject_queue ();
857	establish_connection ();
858	}	1027	}
859	}	1028	}
860		1029
861	void	1030	void
862	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1031	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
863	{	1032	{
864	last_activity = NOW;	1033	last_activity = ev_now ();
865		1034
866	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1035	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
867	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1036	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1037
		1038	if (connectmode == conf_node::C_DISABLED)
		1039	return;
868		1040
869	switch (pkt->typ ())	1041	switch (pkt->typ ())
870	{	1042	{
871	case vpn_packet::PT_PING:	1043	case vpn_packet::PT_PING:
		1044	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1045
872	// we send pings instead of auth packets after some retries,	1046	// we send pings instead of auth packets after some retries,
873	// so reset the retry counter and establish a connection	1047	// so reset the retry counter and establish a connection
874	// when we receive a ping.	1048	// when we receive a ping.
875	if (!ictx)	1049	if (!ictx)
876	{	1050	{
877	if (auth_rate_limiter.can (rsi))	1051	if (auth_rate_limiter.can (rsi))
878	send_auth_request (rsi, true);	1052	send_auth_request (rsi, true);
879	}	1053	}
880	else	1054	else
		1055	// we would love to change the socket address here, but ping's aren't
		1056	// authenticated, so we best ignore it.
881	send_ping (rsi, 1); // pong	1057	send_ping (rsi, 1); // pong
882		1058
883	break;	1059	break;
884		1060
885	case vpn_packet::PT_PONG:	1061	case vpn_packet::PT_PONG:
		1062	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1063
		1064	// a PONG might mean that the other side doesn't really know
		1065	// about our desire for communication.
		1066	establish_connection ();
886	break;	1067	break;
887		1068
888	case vpn_packet::PT_RESET:	1069	case vpn_packet::PT_RESET:
		1070	slog (L_TRACE, "%s >> PT_RESET", conf->nodename);
		1071
		1072	if (ictx && octx)
889	{	1073	{
890	reset_connection ();	1074	reset_connection ("remote reset");
891		1075
892	config_packet p = (config_packet ) pkt;	1076	config_packet p = (config_packet ) pkt;
893		1077
894	if (!p->chk_config ())	1078	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
895	{
896	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
897	conf->nodename, (const char *)rsi);
898	connectmode = conf_node::C_DISABLED;
899	}
900	else if (connectmode == conf_node::C_ALWAYS)
901	establish_connection ();	1079	establish_connection ();
902	}	1080	}
		1081
903	break;	1082	break;
904		1083
905	case vpn_packet::PT_AUTH_REQ:	1084	case vpn_packet::PT_AUTH_REQ:
906	if (auth_rate_limiter.can (rsi))	1085	if (auth_rate_limiter.can (rsi))
907	{	1086	{
908	auth_req_packet p = (auth_req_packet ) pkt;	1087	auth_req_packet p = (auth_req_packet )pkt;
909		1088
910	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1089	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1090	conf->nodename, p->initiate ? "initiate" : "reply",
		1091	p->protocols, p->features);
911		1092
912	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1093	if (memcmp (p->magic, MAGIC, 8))
		1094	{
		1095	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1096	conf->nodename, (const char *)rsi);
		1097	}
		1098	else if (p->chk_config (conf, rsi))
913	{	1099	{
914	if (p->prot_minor != PROTOCOL_MINOR)	1100	if (p->prot_minor != PROTOCOL_MINOR)
915	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1101	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
916	conf->nodename, (const char *)rsi,	1102	conf->nodename, (const char *)rsi,
917	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1103	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
918		1104
919	if (p->initiate)	1105	if (p->initiate)
		1106	{
920	send_auth_request (rsi, false);	1107	send_auth_request (rsi, false);
921		1108
922	rsachallenge k;	1109	if (ictx && octx)
		1110	reset_connection ("reconnect");
		1111	}
923		1112
		1113	auth_data auth;
		1114
924	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1115	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
925	{	1116	{
926	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1117	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
927	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1118	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
928	break;
929	}	1119	}
930	else	1120	else
931	{	1121	{
932	delete octx;	1122	bool chg = !have_rcv_auth \|\| !slow_memeq (&rcv_auth, &auth, sizeof auth);
933		1123
934	octx = new crypto_ctx (k, 1);	1124	rcv_auth = auth;
935	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1125	have_rcv_auth = true;
936		1126
937	// compatibility code, remove when no longer required	1127	send_auth_response (rsi);
938	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
939		1128
		1129	if (chg)
		1130	{
940	conf->protocols = p->protocols;	1131	conf->protocols = p->protocols;
941	features = p->features & config_packet::get_features ();	1132	features = p->features & config_packet::get_features ();
942		1133
943	send_auth_response (rsi, p->id, k);
944
945	connection_established ();	1134	connection_established (rsi);
946
947	break;	1135	}
948	}	1136	}
		1137
		1138	break;
949	}	1139	}
950	else
951	slog (L_WARN, _("%s(%s): protocol mismatch"),
952	conf->nodename, (const char *)rsi);
953		1140
954	send_reset (rsi);	1141	send_reset (rsi);
955	}	1142	}
956		1143
957	break;	1144	break;
958		1145
959	case vpn_packet::PT_AUTH_RES:	1146	case vpn_packet::PT_AUTH_RES:
960	{	1147	{
961	auth_res_packet p = (auth_res_packet ) pkt;	1148	auth_res_packet p = (auth_res_packet )pkt;
962		1149
963	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1150	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
964		1151
965	if (p->chk_config ())	1152	auth_mac local_mac;
		1153	auth_hash (snd_auth, p->response.ecdh, local_mac);
		1154
		1155	if (!slow_memeq (&p->response.mac, local_mac, sizeof local_mac))
966	{	1156	{
967	if (p->prot_minor != PROTOCOL_MINOR)
968	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
969	conf->nodename, (const char *)rsi,
970	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
971
972	rsachallenge chg;
973
974	if (!rsa_cache.find (p->id, chg))
975	{
976	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1157	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
977	conf->nodename, (const char *)rsi);	1158	conf->nodename, (const char *)rsi);
978	break;
979	}	1159	}
980	else	1160	else if (!have_snd_auth)
981	{	1161	{
982	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1162	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
983		1163
984	if (!p->hmac_chk (cctx))	1164	have_snd_auth = true;
985	{
986	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
987	"could be an attack, or just corruption or a synchronization error"),
988	conf->nodename, (const char *)rsi);
989	break;
990	}
991	else
992	{
993	rsaresponse h;
994
995	rsa_hash (p->id, chg, h);
996
997	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
998	{
999	prot_minor = p->prot_minor;
1000
1001	delete ictx; ictx = cctx;
1002
1003	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1004
1005	si = rsi;
1006	protocol = rsi.prot;
1007
1008	connection_established ();	1165	connection_established (rsi);
1009
1010	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1011	conf->nodename, (const char *)rsi,
1012	p->prot_major, p->prot_minor);
1013
1014	if (::conf.script_node_up)
1015	run_script (run_script_cb (this, &connection::script_node_up), false);
1016
1017	break;
1018	}
1019	else
1020	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1021	conf->nodename, (const char *)rsi);
1022	}
1023
1024	delete cctx;
1025	}
1026	}	1166	}
1027	}	1167	}
1028
1029	send_reset (rsi);
1030	break;	1168	break;
1031		1169
1032	case vpn_packet::PT_DATA_COMPRESSED:	1170	case vpn_packet::PT_DATA_COMPRESSED:
1033	#if !ENABLE_COMPRESSION	1171	#if !ENABLE_COMPRESSION
1034	send_reset (rsi);	1172	send_reset (rsi);
…		…
1040	if (ictx && octx)	1178	if (ictx && octx)
1041	{	1179	{
1042	vpndata_packet p = (vpndata_packet )pkt;	1180	vpndata_packet p = (vpndata_packet )pkt;
1043		1181
1044	if (!p->hmac_chk (ictx))	1182	if (!p->hmac_chk (ictx))
		1183	{
		1184	// rekeying often creates temporary hmac auth floods
		1185	// we assume they don't take longer than a few seconds normally,
		1186	// and suppress messages and resets during that time.
		1187	//TODO: should be done per source address
		1188	if (!hmac_error)
		1189	{
		1190	hmac_error = ev_now () + 3;
		1191	break;
		1192	}
		1193	else if (hmac_error >= ev_now ())
		1194	break; // silently suppress
		1195	else
		1196	{
1045	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1197	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1046	"could be an attack, or just corruption or a synchronization error"),	1198	"could be an attack, or just corruption or a synchronization error."),
1047	conf->nodename, (const char *)rsi);	1199	conf->nodename, (const char *)rsi);
		1200	// reset
		1201	}
		1202	}
1048	else	1203	else
1049	{	1204	{
1050	u32 seqno;	1205	u32 seqno;
1051	tap_packet *d = p->unpack (this, seqno);	1206	tap_packet *d = p->unpack (this, seqno);
		1207	int seqclass = iseqno.seqno_classify (seqno);
1052		1208
1053	if (iseqno.recv_ok (seqno))	1209	hmac_error = 0;
		1210
		1211	if (seqclass == 0) // ok
1054	{	1212	{
1055	vpn->tap->send (d);	1213	vpn->tap->send (d);
1056		1214
1057	if (si != rsi)	1215	if (si != rsi)
1058	{	1216	{
1059	// fast re-sync on connection changes, useful especially for tcp/ip	1217	// fast re-sync on source address changes, useful especially for tcp/ip
		1218	//if (last_si_change < ev_now () + 5.)
1060	si = rsi;	1219	// {
1061
1062	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1220	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1063	conf->nodename, (const char )si, (const char )rsi);	1221	conf->nodename, (const char )si, (const char )rsi);
		1222
		1223	si = rsi;
		1224
		1225	if (::conf.script_node_change)
		1226	{
		1227	run_script_cb *cb = new run_script_cb;
		1228	cb->set<connection, &connection::script_node_change> (this);
		1229	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1230	}
		1231
		1232	// }
		1233	//else
		1234	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1235	// conf->nodename, (const char )si, (const char )rsi);
1064	}	1236	}
		1237	}
		1238	else if (seqclass == 1) // far history
		1239	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1240	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1241	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1242	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1243	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1244	else if (seqclass == 3) // reset
		1245	{
		1246	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1247	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1248	send_reset (rsi);
1065	}	1249	}
1066		1250
1067	delete d;	1251	delete d;
1068	break;	1252	break;
1069	}	1253	}
…		…
1073	break;	1257	break;
1074		1258
1075	case vpn_packet::PT_CONNECT_REQ:	1259	case vpn_packet::PT_CONNECT_REQ:
1076	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1260	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1077	{	1261	{
1078	connect_req_packet p = (connect_req_packet ) pkt;	1262	connect_req_packet p = (connect_req_packet )pkt;
1079		1263
1080	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1264	if (p->id > 0 && p->id <= vpn->conns.size ())
1081	connection *c = vpn->conns[p->id - 1];
1082	conf->protocols = p->protocols;
1083
1084	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1085	conf->id, p->id, c->ictx && c->octx);
1086
1087	if (c->ictx && c->octx)
1088	{	1265	{
		1266	connection *c = vpn->conns[p->id - 1];
		1267	conf->protocols = p->protocols;
		1268
		1269	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1270	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1271	p->protocols,
		1272	c->ictx && c->octx);
		1273
		1274	if (c->ictx && c->octx)
		1275	{
1089	// send connect_info packets to both sides, in case one is	1276	// send connect_info packets to both sides, in case one is
1090	// behind a nat firewall (or both ;)	1277	// behind a nat firewall (or both ;)
1091	c->send_connect_info (conf->id, si, conf->protocols);	1278	c->send_connect_info (conf->id, si, conf->protocols);
1092	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1279	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1280	}
		1281	else
		1282	c->establish_connection ();
1093	}	1283	}
1094	else	1284	else
1095	c->establish_connection ();	1285	slog (L_WARN,
		1286	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1287	p->id);
1096	}	1288	}
1097		1289
1098	break;	1290	break;
1099		1291
1100	case vpn_packet::PT_CONNECT_INFO:	1292	case vpn_packet::PT_CONNECT_INFO:
1101	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1293	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1102	{	1294	{
1103	connect_info_packet p = (connect_info_packet ) pkt;	1295	connect_info_packet p = (connect_info_packet )pkt;
1104		1296
1105	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1297	if (p->id > 0 && p->id <= vpn->conns.size ())
1106		1298	{
1107	connection *c = vpn->conns[p->id - 1];	1299	connection *c = vpn->conns[p->id - 1];
1108		1300
1109	c->conf->protocols = p->protocols;	1301	c->conf->protocols = p->protocols;
1110	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1302	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1111	p->si.upgrade_protocol (protocol, c->conf);	1303	p->si.upgrade_protocol (protocol, c->conf);
1112		1304
1113	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1305	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1114	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1306	conf->nodename,
		1307	vpn->conns[p->id - 1]->conf->nodename,
		1308	(const char *)p->si,
		1309	p->protocols,
		1310	protocol,
		1311	p->si.supported_protocols (c->conf),
		1312	!c->ictx && !c->octx);
1115		1313
1116	const sockinfo &dsi = forward_si (p->si);	1314	const sockinfo &dsi = forward_si (p->si);
1117		1315
1118	if (dsi.valid ())	1316	if (dsi.valid ())
1119	c->send_auth_request (dsi, true);	1317	c->send_auth_request (dsi, true);
		1318	else
		1319	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1320	vpn->conns[p->id - 1]->conf->nodename,
		1321	(const char *)p->si);
		1322	}
		1323	else
		1324	slog (L_WARN,
		1325	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1326	p->id);
1120	}	1327	}
1121		1328
1122	break;	1329	break;
1123		1330
1124	default:	1331	default:
1125	send_reset (rsi);	1332	send_reset (rsi);
1126	break;	1333	break;
1127	}	1334	}
1128	}	1335	}
1129		1336
1130	void connection::keepalive_cb (time_watcher &w)	1337	inline void
		1338	connection::keepalive_cb (ev::timer &w, int revents)
1131	{	1339	{
1132	if (NOW >= last_activity + ::conf.keepalive + 30)	1340	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1341
		1342	if (when >= 0)
		1343	w.start (when);
		1344	else if (when < -15)
1133	{	1345	{
1134	reset_connection ();	1346	reset_connection ("keepalive overdue");
1135	establish_connection ();	1347	establish_connection ();
1136	}	1348	}
1137	else if (NOW < last_activity + ::conf.keepalive)
1138	w.start (last_activity + ::conf.keepalive);
1139	else if (conf->connectmode != conf_node::C_ONDEMAND	1349	else if (conf->connectmode != conf_node::C_ONDEMAND
1140	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1350	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1141	{	1351	{
		1352	w.start (3);
1142	send_ping (si);	1353	send_ping (si);
1143	w.start (NOW + 5);
1144	}	1354	}
1145	else if (NOW < last_activity + ::conf.keepalive + 10)	1355	else if (when >= -10)
1146	// hold ondemand connections implicitly a few seconds longer	1356	// hold ondemand connections implicitly a few seconds longer
1147	// should delete octx, though, or something like that ;)	1357	// should delete octx, though, or something like that ;)
1148	w.start (last_activity + ::conf.keepalive + 10);	1358	w.start (when + 10);
1149	else	1359	else
1150	reset_connection ();	1360	reset_connection ("keepalive timeout");
1151	}	1361	}
1152		1362
		1363	void
1153	void connection::send_connect_request (int id)	1364	connection::send_connect_request (int id)
1154	{	1365	{
1155	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1366	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1156		1367
1157	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1368	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1369	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1370	THISNODE->protocols);
1158	p->hmac_set (octx);	1371	p->hmac_set (octx);
1159	send_vpn_packet (p, si);	1372	send_vpn_packet (p, si);
1160		1373
1161	delete p;	1374	delete p;
1162	}	1375	}
1163		1376
1164	void connection::script_node ()	1377	void
		1378	connection::script_init_env (const char *ext)
1165	{	1379	{
1166	vpn->script_if_up ();
1167
1168	char *env;	1380	char *env;
		1381	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1382	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1383	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1384	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1385	conf->id & 0xff); putenv (env);
		1386	}
		1387
		1388	void
		1389	connection::script_init_connect_env ()
		1390	{
		1391	vpn->script_init_env ();
		1392
		1393	char *env;
1169	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1394	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1395	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1170	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1396	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1171	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1397	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1172	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1398	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1173	}	1399	}
1174		1400
		1401	inline const char *
1175	const char *connection::script_node_up ()	1402	connection::script_node_up ()
1176	{	1403	{
1177	script_node ();	1404	script_init_connect_env ();
1178		1405
1179	putenv ("STATE=up");	1406	putenv ((char *)"STATE=up");
1180		1407
		1408	char *filename;
		1409	asprintf (&filename,
		1410	"%s/%s",
		1411	confbase,
1181	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1412	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1182	}
1183		1413
		1414	return filename;
		1415	}
		1416
		1417	inline const char *
		1418	connection::script_node_change ()
		1419	{
		1420	script_init_connect_env ();
		1421
		1422	putenv ((char *)"STATE=change");
		1423
		1424	char *filename;
		1425	asprintf (&filename,
		1426	"%s/%s",
		1427	confbase,
		1428	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1429
		1430	return filename;
		1431	}
		1432
		1433	inline const char *
1184	const char *connection::script_node_down ()	1434	connection::script_node_down ()
1185	{	1435	{
1186	script_node ();	1436	script_init_connect_env ();
1187		1437
1188	putenv ("STATE=down");	1438	putenv ((char *)"STATE=down");
1189		1439
1190	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1440	char *filename;
1191	}	1441	asprintf (&filename,
		1442	"%s/%s",
		1443	confbase,
		1444	::conf.script_node_down ? ::conf.script_node_down : "node-down");
1192		1445
		1446	return filename;
		1447	}
		1448
1193	connection::connection(struct vpn *vpn_)	1449	connection::connection (struct vpn vpn, conf_node conf)
1194	: vpn(vpn_)	1450	: vpn(vpn), conf(conf),
1195	, rekey (this, &connection::rekey_cb)	1451	#if ENABLE_DNS
1196	, keepalive (this, &connection::keepalive_cb)	1452	dns (0),
		1453	#endif
		1454	data_queue(conf->max_ttl, conf->max_queue + 1),
		1455	vpn_queue(conf->max_ttl, conf->max_queue + 1)
		1456	{
		1457	rekey .set<connection, &connection::rekey_cb > (this);
		1458	keepalive .set<connection, &connection::keepalive_cb > (this);
1197	, establish_connection (this, &connection::establish_connection_cb)	1459	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1198	{	1460
		1461	last_establish_attempt = 0.;
1199	octx = ictx = 0;	1462	octx = ictx = 0;
1200	retry_cnt = 0;
1201		1463
1202	connectmode = conf_node::C_ALWAYS; // initial setting	1464	connectmode = conf->connectmode;
		1465
		1466	// queue a dummy packet to force an initial connection attempt
		1467	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1468	vpn_queue.put (new net_packet);
		1469
1203	reset_connection ();	1470	reset_connection ("startup");
1204	}	1471	}
1205		1472
1206	connection::~connection ()	1473	connection::~connection ()
1207	{	1474	{
1208	shutdown ();	1475	shutdown ();
1209	}	1476	}
1210		1477
		1478	void
1211	void connection_init ()	1479	connection_init ()
1212	{	1480	{
1213	auth_rate_limiter.clear ();	1481	auth_rate_limiter.clear ();
1214	reset_rate_limiter.clear ();	1482	reset_rate_limiter.clear ();
1215	}	1483	}
1216		1484

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Comparing gvpe/src/connection.C (file contents): Revision 1.37 by pcg, Fri Jun 11 15:56:34 2004 UTC vs. Revision 1.112 by root, Fri Sep 12 10:40:43 2014 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.37 by pcg, Fri Jun 11 15:56:34 2004 UTC vs.
Revision 1.112 by root, Fri Sep 12 10:40:43 2014 UTC