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

Comparing gvpe/src/connection.C (file contents):
Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 2013 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
26	#include <openssl/rand.h>	38	#include <openssl/rand.h>
27	#include <openssl/evp.h>	39	#include <openssl/evp.h>
28	#include <openssl/rsa.h>	40	#include <openssl/rsa.h>
29	#include <openssl/err.h>	41	#include <openssl/err.h>
30
31	#include "gettext.h"
32		42
33	#include "conf.h"	43	#include "conf.h"
34	#include "slog.h"	44	#include "slog.h"
35	#include "device.h"	45	#include "device.h"
36	#include "vpn.h"	46	#include "vpn.h"
37	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
38		49
39	#include "netcompat.h"	50	#include "netcompat.h"
40		51
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	52	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
46		53
47	#define ULTRA_FAST 1	54	#define ULTRA_FAST 1
48	#define HLOG 15	55	#define HLOG 15
49	#include "lzf/lzf.h"	56	#include "lzf/lzf.h"
50	#include "lzf/lzf_c.c"	57	#include "lzf/lzf_c.c"
51	#include "lzf/lzf_d.c"	58	#include "lzf/lzf_d.c"
52		59
		60	//////////////////////////////////////////////////////////////////////////////
		61
		62	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		63	static ev::child rs_child_ev;
		64
		65	namespace
		66	{
		67	void // c++ requires external linkage here, apparently :(
		68	rs_child_cb (ev::child &w, int revents)
		69	{
		70	w.stop ();
		71
		72	if (rs_queue.empty ())
		73	return;
		74
		75	pid_t pid = run_script (*rs_queue.front ().first, false);
		76	if (pid)
		77	{
		78	w.set (pid);
		79	w.start ();
		80	}
		81	else
		82	slog (L_WARN, rs_queue.front ().second);
		83
		84	delete rs_queue.front ().first;
		85	rs_queue.pop ();
		86	}
		87	};
		88
		89	// despite the fancy name, this is quite a hack
		90	static void
		91	run_script_queued (run_script_cb cb, const char warnmsg)
		92	{
		93	rs_queue.push (std::make_pair (cb, warnmsg));
		94
		95	if (!rs_child_ev.is_active ())
		96	{
		97	rs_child_ev.set<rs_child_cb> ();
		98	rs_child_ev ();
		99	}
		100	}
		101
		102	//////////////////////////////////////////////////////////////////////////////
		103
53	struct crypto_ctx	104	struct crypto_ctx
54	{	105	{
55	EVP_CIPHER_CTX cctx;	106	EVP_CIPHER_CTX cctx;
56	HMAC_CTX hctx;	107	HMAC_CTX hctx;
57		108
58	crypto_ctx (const rsachallenge &challenge, int enc);	109	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
59	~crypto_ctx ();	110	~crypto_ctx ();
60	};	111	};
61		112
62	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	113	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
63	{	114	{
		115	ecdh_key s;
		116
		117	curve25519_combine (a, b, s);
		118
		119	{
		120	u8 mac_key[MAC_KEYSIZE];
		121	static const unsigned char mac_info[] = "gvpe mac key";
		122
		123	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		124	kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		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 (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		140	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		141	kdf.extract (s, sizeof (s));
		142	kdf.extract_done (HKDF_PRF_HASH ());
		143	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		144
64	EVP_CIPHER_CTX_init (&cctx);	145	EVP_CIPHER_CTX_init (&cctx);
65	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	146	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
66	HMAC_CTX_init (&hctx);	147	}
67	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
68	}	148	}
69		149
70	crypto_ctx::~crypto_ctx ()	150	crypto_ctx::~crypto_ctx ()
71	{	151	{
72	require (EVP_CIPHER_CTX_cleanup (&cctx));	152	require (EVP_CIPHER_CTX_cleanup (&cctx));
73	HMAC_CTX_cleanup (&hctx);	153	HMAC_CTX_cleanup (&hctx);
74	}	154	}
75		155
		156	static inline void
		157	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		158	{
		159	if (RSA_public_encrypt (sizeof (auth.rsa),
		160	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		161	key, RSA_PKCS1_OAEP_PADDING) < 0)
		162	fatal ("RSA_public_encrypt error");
		163
		164	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		165	}
		166
		167	static inline bool
		168	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		169	{
		170	u8 rsa_decrypt[RSA_KEYLEN];
		171
		172	if (RSA_private_decrypt (sizeof (encr.rsa),
		173	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		174	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		175	return 0;
		176
		177	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		178	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		179
		180	return 1;
		181	}
		182
76	static void	183	static void
77	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	184	auth_hash (const auth_data &auth, auth_mac &mac)
78	{	185	{
79	EVP_MD_CTX ctx;	186	HMAC_CTX ctx;
80		187
81	EVP_MD_CTX_init (&ctx);	188	HMAC_CTX_init (&ctx);
82	require (EVP_DigestInit (&ctx, RSA_HASH));	189	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
83	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));	190	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
84	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
85	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));	191	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
86	EVP_MD_CTX_cleanup (&ctx);	192	HMAC_CTX_cleanup (&ctx);
87	}	193	}
88		194
89	struct rsa_entry {	195	void
90	tstamp expire;	196	connection::generate_auth_data ()
91	rsaid id;
92	rsachallenge chg;
93	};
94
95	struct rsa_cache : list<rsa_entry>
96	{	197	{
97	void cleaner_cb (time_watcher &w); time_watcher cleaner;	198	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	{ }	199	{
		200	// request data
		201	RAND_bytes ((unsigned char *)&snd_auth.rsa, sizeof snd_auth.rsa);
		202	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
		203	auth_hash (snd_auth, snd_auth_mac);
138		204
139	} rsa_cache;	205	// eventual response data
140		206	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
141	void rsa_cache::cleaner_cb (time_watcher &w)
142	{
143	if (!empty ())
144	{	207	}
145	w.start (NOW + RSA_TTL);
146		208
147	for (iterator i = begin (); i != end (); )	209	// every use prolongs the expiry
148	if (i->expire <= NOW)	210	auth_expire = ev_now () + AUTH_TTL;
149	i = erase (i);
150	else
151	++i;
152	}
153	}	211	}
154		212
155	//////////////////////////////////////////////////////////////////////////////	213	//////////////////////////////////////////////////////////////////////////////
156		214
157	void pkt_queue::put (net_packet *p)	215	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		216	: max_ttl (max_ttl), max_queue (max_queue)
158	{	217	{
159	if (queue[i])	218	queue = new pkt [max_queue];
160	{
161	delete queue[i];
162	j = (j + 1) % QUEUEDEPTH;
163	}
164		219
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;	220	i = 0;
187	j = 0;	221	j = 0;
		222
		223	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
188	}	224	}
189		225
190	pkt_queue::~pkt_queue ()	226	pkt_queue::~pkt_queue ()
191	{	227	{
192	for (i = QUEUEDEPTH; --i > 0; )	228	while (net_packet *p = get ())
		229	delete p;
		230
193	delete queue[i];	231	delete [] queue;
194	}	232	}
195		233
		234	void
		235	pkt_queue::expire_cb (ev::timer &w, int revents)
		236	{
		237	ev_tstamp expire = ev_now () - max_ttl;
		238
		239	for (;;)
		240	{
		241	if (empty ())
		242	break;
		243
		244	double diff = queue[j].tstamp - expire;
		245
		246	if (diff >= 0.)
		247	{
		248	w.start (diff > 0.5 ? diff : 0.5);
		249	break;
		250	}
		251
		252	delete get ();
		253	}
		254	}
		255
		256	void
		257	pkt_queue::put (net_packet *p)
		258	{
		259	ev_tstamp now = ev_now ();
		260
		261	// start expiry timer
		262	if (empty ())
		263	expire.start (max_ttl);
		264
		265	int ni = i + 1 == max_queue ? 0 : i + 1;
		266
		267	if (ni == j)
		268	delete get ();
		269
		270	queue[i].pkt = p;
		271	queue[i].tstamp = now;
		272
		273	i = ni;
		274	}
		275
		276	net_packet *
		277	pkt_queue::get ()
		278	{
		279	if (empty ())
		280	return 0;
		281
		282	net_packet *p = queue[j].pkt;
		283	queue[j].pkt = 0;
		284
		285	j = j + 1 == max_queue ? 0 : j + 1;
		286
		287	return p;
		288	}
		289
196	struct net_rateinfo {	290	struct net_rateinfo
		291	{
197	u32 host;	292	u32 host;
198	double pcnt, diff;	293	double pcnt, diff;
199	tstamp last;	294	tstamp last;
200	};	295	};
201		296
202	// only do action once every x seconds per host whole allowing bursts.	297	// only do action once every x seconds per host whole allowing bursts.
203	// this implementation ("splay list" ;) is inefficient,	298	// this implementation ("splay list" ;) is inefficient,
204	// but low on resources.	299	// but low on resources.
205	struct net_rate_limiter : list<net_rateinfo>	300	struct net_rate_limiter : list<net_rateinfo>
206	{	301	{
207	static const double ALPHA = 1. - 1. / 600.; // allow bursts	302	# define NRL_ALPHA (1. - 1. / 600.) // allow bursts
208	static const double CUTOFF = 10.; // one event every CUTOFF seconds	303	# define NRL_CUTOFF 10. // one event every CUTOFF seconds
209	static const double EXPIRE = CUTOFF * 30.; // expire entries after this time	304	# define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time
210	static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value	305	# define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value
211		306
212	bool can (const sockinfo &si) { return can((u32)si.host); }	307	bool can (const sockinfo &si) { return can((u32)si.host); }
213	bool can (u32 host);	308	bool can (u32 host);
214	};	309	};
215		310
216	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	311	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
217		312
		313	bool
218	bool net_rate_limiter::can (u32 host)	314	net_rate_limiter::can (u32 host)
219	{	315	{
220	iterator i;	316	iterator i;
221		317
222	for (i = begin (); i != end (); )	318	for (i = begin (); i != end (); )
223	if (i->host == host)	319	if (i->host == host)
224	break;	320	break;
225	else if (i->last < NOW - EXPIRE)	321	else if (i->last < ev_now () - NRL_EXPIRE)
226	i = erase (i);	322	i = erase (i);
227	else	323	else
228	i++;	324	i++;
229		325
230	if (i == end ())	326	if (i == end ())
231	{	327	{
232	net_rateinfo ri;	328	net_rateinfo ri;
233		329
234	ri.host = host;	330	ri.host = host;
235	ri.pcnt = 1.;	331	ri.pcnt = 1.;
236	ri.diff = MAXDIF;	332	ri.diff = NRL_MAXDIF;
237	ri.last = NOW;	333	ri.last = ev_now ();
238		334
239	push_front (ri);	335	push_front (ri);
240		336
241	return true;	337	return true;
242	}	338	}
243	else	339	else
244	{	340	{
245	net_rateinfo ri (*i);	341	net_rateinfo ri (*i);
246	erase (i);	342	erase (i);
247		343
248	ri.pcnt = ri.pcnt * ALPHA;	344	ri.pcnt = ri.pcnt * NRL_ALPHA;
249	ri.diff = ri.diff * ALPHA + (NOW - ri.last);	345	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
250		346
251	ri.last = NOW;	347	ri.last = ev_now ();
252		348
253	double dif = ri.diff / ri.pcnt;	349	double dif = ri.diff / ri.pcnt;
254		350
255	bool send = dif > CUTOFF;	351	bool send = dif > NRL_CUTOFF;
256		352
257	if (dif > MAXDIF)	353	if (dif > NRL_MAXDIF)
258	{	354	{
259	ri.pcnt = 1.;	355	ri.pcnt = 1.;
260	ri.diff = MAXDIF;	356	ri.diff = NRL_MAXDIF;
261	}	357	}
262	else if (send)	358	else if (send)
263	ri.pcnt++;	359	ri.pcnt++;
264		360
265	push_front (ri);	361	push_front (ri);
270		366
271	/////////////////////////////////////////////////////////////////////////////	367	/////////////////////////////////////////////////////////////////////////////
272		368
273	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	369	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
274		370
		371	void
275	void hmac_packet::hmac_gen (crypto_ctx *ctx)	372	hmac_packet::hmac_gen (crypto_ctx *ctx)
276	{	373	{
277	unsigned int xlen;	374	unsigned int xlen;
278		375
279	HMAC_CTX *hctx = &ctx->hctx;	376	HMAC_CTX *hctx = &ctx->hctx;
280		377
281	HMAC_Init_ex (hctx, 0, 0, 0, 0);	378	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
282	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	379	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
283	len - sizeof (hmac_packet));	380	len - sizeof (hmac_packet)));
284	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	381	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
285	}	382	}
286		383
287	void	384	void
288	hmac_packet::hmac_set (crypto_ctx *ctx)	385	hmac_packet::hmac_set (crypto_ctx *ctx)
289	{	386	{
…		…
298	hmac_gen (ctx);	395	hmac_gen (ctx);
299		396
300	return !memcmp (hmac, hmac_digest, HMACLENGTH);	397	return !memcmp (hmac, hmac_digest, HMACLENGTH);
301	}	398	}
302		399
		400	void
303	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	401	vpn_packet::set_hdr (ptype type_, unsigned int dst)
304	{	402	{
305	type = type_;	403	type = type_;
306		404
307	int src = THISNODE->id;	405	int src = THISNODE->id;
308		406
…		…
313		411
314	#define MAXVPNDATA (MAX_MTU - 6 - 6)	412	#define MAXVPNDATA (MAX_MTU - 6 - 6)
315	#define DATAHDR (sizeof (u32) + RAND_SIZE)	413	#define DATAHDR (sizeof (u32) + RAND_SIZE)
316		414
317	struct vpndata_packet : vpn_packet	415	struct vpndata_packet : vpn_packet
		416	{
		417	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		418
		419	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		420	tap_packet unpack (connection conn, u32 &seqno);
		421
		422	private:
		423	const u32 data_hdr_size () const
318	{	424	{
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;	425	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
328	}
329	};	426	}
		427	};
330		428
331	void	429	void
332	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	430	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
333	{	431	{
334	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	432	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
336	ptype type = PT_DATA_UNCOMPRESSED;	434	ptype type = PT_DATA_UNCOMPRESSED;
337		435
338	#if ENABLE_COMPRESSION	436	#if ENABLE_COMPRESSION
339	u8 cdata[MAX_MTU];	437	u8 cdata[MAX_MTU];
340		438
341	if (conn->features & ENABLE_COMPRESSION)	439	if (conn->features & FEATURE_COMPRESSION)
342	{	440	{
343	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	441	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
344		442
345	if (cl)	443	if (cl)
346	{	444	{
…		…
352	d[1] = cl;	450	d[1] = cl;
353	}	451	}
354	}	452	}
355	#endif	453	#endif
356		454
357	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	455	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
358		456
359	struct {	457	struct {
360	#if RAND_SIZE	458	#if RAND_SIZE
361	u8 rnd[RAND_SIZE];	459	u8 rnd[RAND_SIZE];
362	#endif	460	#endif
363	u32 seqno;	461	u32 seqno;
364	} datahdr;	462	} datahdr;
365		463
366	datahdr.seqno = ntohl (seqno);	464	datahdr.seqno = ntohl (seqno);
367	#if RAND_SIZE	465	#if RAND_SIZE
368	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	466	RAND_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);
369	#endif	467	#endif
370		468
371	require (EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
372	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
373	(unsigned char *) &datahdr, DATAHDR));	471	(unsigned char *) &datahdr, DATAHDR));
…		…
395	int outl = 0, outl2;	493	int outl = 0, outl2;
396	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
397	u8 *d;	495	u8 *d;
398	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
399		497
400	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
401		499
402	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
403	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
404		502
405	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
…		…
447	}	545	}
448	};	546	};
449		547
450	struct config_packet : vpn_packet	548	struct config_packet : vpn_packet
451	{	549	{
452	// actually, hmaclen cannot be checked because the hmac
453	// field comes before this data, so peers with other
454	// hmacs simply will not work.
455	u8 prot_major, prot_minor, randsize, hmaclen;	550	u8 prot_major, prot_minor, randsize;
456	u8 flags, challengelen, features, pad3;	551	u8 flags, features, pad6, pad7, pad8;
457	u32 cipher_nid, digest_nid, hmac_nid;	552	u32 cipher_nid, mac_nid, auth_nid;
458		553
459	void setup (ptype type, int dst);	554	void setup (ptype type, int dst);
460	bool chk_config () const;	555	bool chk_config () const;
		556
		557	static u8 get_features ()
		558	{
		559	u8 f = 0;
		560	#if ENABLE_COMPRESSION
		561	f \|= FEATURE_COMPRESSION;
		562	#endif
		563	#if ENABLE_ROHC
		564	f \|= FEATURE_ROHC;
		565	#endif
		566	#if ENABLE_BRIDGING
		567	f \|= FEATURE_BRIDGING;
		568	#endif
		569	return f;
		570	}
461	};	571	};
462		572
463	#define FEATURES ((ENABLE_COMPRESSION ? FEATURE_COMPRESSION : 0) \	573	void
464	\| (ENABLE_ROHC ? FEATURE_ROHC : 0))
465
466	void config_packet::setup (ptype type, int dst)	574	config_packet::setup (ptype type, int dst)
467	{	575	{
468	prot_major = PROTOCOL_MAJOR;	576	prot_major = PROTOCOL_MAJOR;
469	prot_minor = PROTOCOL_MINOR;	577	prot_minor = PROTOCOL_MINOR;
470	randsize = RAND_SIZE;	578	randsize = RAND_SIZE;
471	hmaclen = HMACLENGTH;	579	flags = 0;
472	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;	580	features = get_features ();
473	challengelen = sizeof (rsachallenge);
474	features = FEATURES;
475		581
476	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	582	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
477	digest_nid = htonl (EVP_MD_type (RSA_HASH));
478	hmac_nid = htonl (EVP_MD_type (DIGEST));	583	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		584	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
479		585
480	len = sizeof (*this) - sizeof (net_packet);	586	len = sizeof (*this) - sizeof (net_packet);
481	set_hdr (type, dst);	587	set_hdr (type, dst);
482	}	588	}
483		589
		590	bool
484	bool config_packet::chk_config () const	591	config_packet::chk_config () const
485	{	592	{
486	if (prot_major != PROTOCOL_MAJOR)	593	if (prot_major != PROTOCOL_MAJOR)
487	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	594	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
488	else if (randsize != RAND_SIZE)	595	else if (randsize != RAND_SIZE)
489	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	596	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
490	else if (hmaclen != HMACLENGTH)
491	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
492	#if 0 // this implementation should handle all flag settings
493	else if (flags != curflags ())
494	slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ());
495	#endif
496	else if (challengelen != sizeof (rsachallenge))
497	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
498	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	597	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
499	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	598	slog (L_WARN, _("cipher algo mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
500	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
501	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
502	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	599	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
503	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	600	slog (L_WARN, _("mac algo mismatch (remote %x <=> local %x)"), ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		601	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		602	slog (L_WARN, _("auth algo mismatch (remote %x <=> local %x)"), ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
504	else	603	else
505	return true;	604	return true;
506		605
507	return false;	606	return false;
508	}	607	}
509		608
510	struct auth_req_packet : config_packet	609	struct auth_req_packet : config_packet // UNPROTECTED
511	{	610	{
512	char magic[8];	611	char magic[8];
513	u8 initiate; // false if this is just an automatic reply	612	u8 initiate; // false if this is just an automatic reply
514	u8 protocols; // supported protocols (will be patched on forward)	613	u8 protocols; // supported protocols (will be patched on forward)
515	u8 pad2, pad3;	614	u8 pad2, pad3;
516	rsaid id;	615	auth_encr encr;
517	rsaencrdata encr;
518		616
519	auth_req_packet (int dst, bool initiate_, u8 protocols_)	617	auth_req_packet (int dst, bool initiate_, u8 protocols_)
520	{	618	{
521	config_packet::setup (PT_AUTH_REQ, dst);	619	config_packet::setup (PT_AUTH_REQ, dst);
522	strncpy (magic, MAGIC, 8);	620	memcpy (magic, MAGIC, 8);
523	initiate = !!initiate_;	621	initiate = !!initiate_;
524	protocols = protocols_;	622	protocols = protocols_;
525		623
526	len = sizeof (*this) - sizeof (net_packet);	624	len = sizeof (*this) - sizeof (net_packet);
527	}	625	}
528	};	626	};
529		627
530	struct auth_res_packet : config_packet	628	struct auth_res_packet : config_packet // UNPROTECTED
531	{	629	{
532	rsaid id;
533	u8 pad1, pad2, pad3;
534	u8 response_len; // encrypted length
535	rsaresponse response;	630	auth_response response;
536		631
537	auth_res_packet (int dst)	632	auth_res_packet (int dst)
538	{	633	{
539	config_packet::setup (PT_AUTH_RES, dst);	634	config_packet::setup (PT_AUTH_RES, dst);
540		635
…		…
574	};	669	};
575		670
576	/////////////////////////////////////////////////////////////////////////////	671	/////////////////////////////////////////////////////////////////////////////
577		672
578	void	673	void
579	connection::connection_established ()	674	connection::connection_established (const sockinfo &rsi)
580	{	675	{
		676	if (!have_snd_auth \|\| !have_rcv_auth)
		677	return;
		678
		679	si = rsi;
		680	protocol = rsi.prot;
		681
		682	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		683	conf->nodename, (const char *)rsi,
		684	is_direct ? "direct" : "forwarded",
		685	PROTOCOL_MAJOR, prot_minor);
		686
		687	if (::conf.script_node_up)
		688	{
		689	run_script_cb *cb = new run_script_cb;
		690	cb->set<connection, &connection::script_node_up> (this);
		691	run_script_queued (cb, _("node-up command execution failed, continuing."));
		692	}
		693
		694	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		695	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		696
		697	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		698	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		699
581	if (ictx && octx)	700	if (ictx && octx)
582	{	701	{
583	connectmode = conf->connectmode;	702	// make sure rekeying timeouts are slightly asymmetric
		703	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		704	rekey.start (rekey_interval, rekey_interval);
584		705
585	rekey.start (NOW + ::conf.rekey);
586	keepalive.start (NOW + ::conf.keepalive);	706	keepalive.start (::conf.keepalive);
587		707
588	// send queued packets	708	// send queued packets
589	if (ictx && octx)	709	if (ictx && octx)
590	{	710	{
591	while (tap_packet p = (tap_packet )data_queue.get ())	711	while (tap_packet p = (tap_packet )data_queue.get ())
592	{	712	{
593	send_data_packet (p);	713	if (p->len) send_data_packet (p);
594	delete p;	714	delete p;
595	}	715	}
596		716
597	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	717	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
598	{	718	{
599	send_vpn_packet (p, si, IPTOS_RELIABILITY);	719	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
600	delete p;	720	delete p;
601	}	721	}
602	}	722	}
		723
		724	vpn->connection_established (this);
603	}	725	}
		726	#if 0
604	else	727	else
605	{	728	{
606	retry_cnt = 0;	729	retry_cnt = 0;
607	establish_connection.start (NOW + 5);	730	establish_connection.start (5);
608	keepalive.stop ();	731	keepalive.stop ();
609	rekey.stop ();	732	rekey.stop ();
610	}	733	}
		734	#endif
611	}	735	}
612		736
613	void	737	void
614	connection::reset_si ()	738	connection::reset_si ()
615	{	739	{
		740	if (vpn->can_direct (THISNODE, conf))
616	protocol = best_protocol (THISNODE->protocols & conf->protocols);	741	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
617		742	else
618	// mask out protocols we cannot establish	743	{
619	if (!conf->udp_port) protocol &= ~PROT_UDPv4;	744	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
620	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;	745	protocol = 0;
		746	}
621		747
622	si.set (conf, protocol);	748	si.set (conf, protocol);
		749
		750	is_direct = si.valid ();
623	}	751	}
624		752
625	// ensure sockinfo is valid, forward if necessary	753	// ensure sockinfo is valid, forward if necessary
626	const sockinfo &	754	const sockinfo &
627	connection::forward_si (const sockinfo &si) const	755	connection::forward_si (const sockinfo &si) const
628	{	756	{
629	if (!si.valid ())	757	if (!si.valid ())
630	{	758	{
631	connection *r = vpn->find_router ();	759	connection *r = vpn->find_router_for (this);
632		760
633	if (r)	761	if (r)
634	{	762	{
635	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	763	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
636	conf->nodename, r->conf->nodename);	764	conf->nodename, r->conf->nodename);
637	return r->si;	765	return r->si;
638	}	766	}
639	else	767	else
640	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	768	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
641	conf->nodename);	769	conf->nodename);
642	}	770	}
643		771
644	return si;	772	return si;
645	}	773	}
…		…
655	connection::send_ping (const sockinfo &si, u8 pong)	783	connection::send_ping (const sockinfo &si, u8 pong)
656	{	784	{
657	ping_packet *pkt = new ping_packet;	785	ping_packet *pkt = new ping_packet;
658		786
659	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	787	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		788
		789	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
660	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	790	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
661		791
662	delete pkt;	792	delete pkt;
663	}	793	}
664		794
…		…
679	void	809	void
680	connection::send_auth_request (const sockinfo &si, bool initiate)	810	connection::send_auth_request (const sockinfo &si, bool initiate)
681	{	811	{
682	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	812	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
683		813
684	rsachallenge chg;	814	generate_auth_data ();
685	rsa_cache.gen (pkt->id, chg);
686	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	815	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
687		816
688	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	817	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
689
690	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	818	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
691		819
692	delete pkt;	820	delete pkt;
693	}	821	}
694		822
695	void	823	void
696	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	824	connection::send_auth_response (const sockinfo &si)
697	{	825	{
698	auth_res_packet *pkt = new auth_res_packet (conf->id);	826	auth_res_packet *pkt = new auth_res_packet (conf->id);
699		827
700	pkt->id = id;	828	auth_hash (rcv_auth, pkt->response.mac);
		829	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
701		830
702	rsa_hash (id, chg, pkt->response);
703
704	pkt->hmac_set (octx);
705
706	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	831	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
707
708	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	832	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
709		833
710	delete pkt;	834	delete pkt;
711	}	835	}
712		836
713	void	837	void
714	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	838	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
715	{	839	{
716	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	840	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
717	conf->id, rid, (const char *)rsi);	841	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		842	conf->protocols);
718		843
719	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	844	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
720		845
721	r->hmac_set (octx);	846	r->hmac_set (octx);
722	send_vpn_packet (r, si);	847	send_vpn_packet (r, si);
723		848
724	delete r;	849	delete r;
725	}	850	}
726		851
727	void	852	inline void
728	connection::establish_connection_cb (time_watcher &w)	853	connection::establish_connection_cb (ev::timer &w, int revents)
729	{	854	{
730	if (!ictx	855	if (!(ictx && octx)
731	&& conf != THISNODE	856	&& conf != THISNODE
732	&& connectmode != conf_node::C_NEVER	857	&& connectmode != conf_node::C_NEVER
733	&& connectmode != conf_node::C_DISABLED	858	&& connectmode != conf_node::C_DISABLED
734	&& NOW > w.at)	859	&& !w.is_active ())
735	{	860	{
736	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	861	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
737		862	// and stop trying. should probably be handled by a per-connection expire handler.
738	if (retry_int < 3600 * 8)	863	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		864	{
		865	reset_connection ();
739	retry_cnt++;	866	return;
		867	}
740		868
741	w.start (NOW + retry_int);	869	last_establish_attempt = ev_now ();
		870
		871	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		872	? (retry_cnt & 3) + 1
		873	: 1 << (retry_cnt >> 2));
742		874
743	reset_si ();	875	reset_si ();
744		876
745	if (si.prot && !si.host)	877	bool slow = si.prot & PROT_SLOW;
		878
		879	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		880	{
		881	/TODO/ /* start the timer so we don't recurse endlessly */
		882	w.start (1);
746	vpn->send_connect_request (conf->id);	883	vpn->send_connect_request (this);
		884	}
747	else	885	else
748	{	886	{
		887	if (si.valid ())
		888	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		889	conf->nodename, (const char *)si);
		890
749	const sockinfo &dsi = forward_si (si);	891	const sockinfo &dsi = forward_si (si);
		892
		893	slow = slow \|\| (dsi.prot & PROT_SLOW);
750		894
751	if (dsi.valid () && auth_rate_limiter.can (dsi))	895	if (dsi.valid () && auth_rate_limiter.can (dsi))
752	{	896	{
753	if (retry_cnt < 4)	897	if (retry_cnt < 4)
754	send_auth_request (dsi, true);	898	send_auth_request (dsi, true);
755	else	899	else
756	send_ping (dsi, 0);	900	send_ping (dsi, 0);
757	}	901	}
758	}	902	}
		903
		904	retry_int *= slow ? 8. : 0.9;
		905
		906	if (retry_int < conf->max_retry)
		907	retry_cnt++;
		908	else
		909	retry_int = conf->max_retry;
		910
		911	w.start (retry_int);
759	}	912	}
760	}	913	}
761		914
762	void	915	void
763	connection::reset_connection ()	916	connection::reset_connection ()
…		…
766	{	919	{
767	slog (L_INFO, _("%s(%s): connection lost"),	920	slog (L_INFO, _("%s(%s): connection lost"),
768	conf->nodename, (const char *)si);	921	conf->nodename, (const char *)si);
769		922
770	if (::conf.script_node_down)	923	if (::conf.script_node_down)
771	run_script (run_script_cb (this, &connection::script_node_down), false);	924	{
		925	run_script_cb *cb = new run_script_cb;
		926	cb->set<connection, &connection::script_node_down> (this);
		927	run_script_queued (cb, _("node-down command execution failed, continuing."));
		928	}
772	}	929	}
773		930
774	delete ictx; ictx = 0;	931	delete ictx; ictx = 0;
775	delete octx; octx = 0;	932	delete octx; octx = 0;
776		933
777	si.host= 0;	934	si.host = 0;
778		935
		936	have_snd_auth = false;
		937	have_rcv_auth = false;
		938	auth_expire = 0.;
		939
779	last_activity = 0;	940	last_activity = 0.;
		941	//last_si_change = 0.;
780	retry_cnt = 0;	942	retry_cnt = 0;
781		943
782	rekey.stop ();	944	rekey.stop ();
783	keepalive.stop ();	945	keepalive.stop ();
784	establish_connection.stop ();	946	establish_connection.stop ();
…		…
791	send_reset (si);	953	send_reset (si);
792		954
793	reset_connection ();	955	reset_connection ();
794	}	956	}
795		957
796	void	958	// poor-man's rekeying
797	connection::rekey_cb (time_watcher &w)	959	inline void
		960	connection::rekey_cb (ev::timer &w, int revents)
798	{	961	{
799	reset_connection ();	962	reset_connection ();
800	establish_connection ();	963	establish_connection ();
801	}	964	}
802		965
…		…
818	if (oseqno > MAX_SEQNO)	981	if (oseqno > MAX_SEQNO)
819	rekey ();	982	rekey ();
820	}	983	}
821		984
822	void	985	void
		986	connection::post_inject_queue ()
		987	{
		988	// force a connection every now and when when packets are sent (max 1/s)
		989	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		990	establish_connection.stop ();
		991
		992	establish_connection ();
		993	}
		994
		995	void
823	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	996	connection::inject_data_packet (tap_packet *pkt)
824	{	997	{
825	if (ictx && octx)	998	if (ictx && octx)
826	send_data_packet (pkt);	999	send_data_packet (pkt);
827	else	1000	else
828	{	1001	{
829	if (!broadcast)//DDDD
830	data_queue.put (new tap_packet (*pkt));	1002	data_queue.put (new tap_packet (*pkt));
831		1003	post_inject_queue ();
832	establish_connection ();
833	}	1004	}
834	}	1005	}
835		1006
		1007	void
836	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1008	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
837	{	1009	{
838	if (ictx && octx)	1010	if (ictx && octx)
839	send_vpn_packet (pkt, si, tos);	1011	send_vpn_packet (pkt, si, tos);
840	else	1012	else
841	{	1013	{
842	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1014	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
843		1015	post_inject_queue ();
844	establish_connection ();
845	}	1016	}
846	}	1017	}
847		1018
848	void	1019	void
849	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1020	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
850	{	1021	{
851	last_activity = NOW;	1022	last_activity = ev_now ();
852		1023
853	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1024	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
854	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1025	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1026
		1027	if (connectmode == conf_node::C_DISABLED)
		1028	return;
855		1029
856	switch (pkt->typ ())	1030	switch (pkt->typ ())
857	{	1031	{
858	case vpn_packet::PT_PING:	1032	case vpn_packet::PT_PING:
		1033	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1034
859	// we send pings instead of auth packets after some retries,	1035	// we send pings instead of auth packets after some retries,
860	// so reset the retry counter and establish a connection	1036	// so reset the retry counter and establish a connection
861	// when we receive a ping.	1037	// when we receive a ping.
862	if (!ictx)	1038	if (!ictx)
863	{	1039	{
864	if (auth_rate_limiter.can (rsi))	1040	if (auth_rate_limiter.can (rsi))
865	send_auth_request (rsi, true);	1041	send_auth_request (rsi, true);
866	}	1042	}
867	else	1043	else
		1044	// we would love to change the socket address here, but ping's aren't
		1045	// authenticated, so we best ignore it.
868	send_ping (rsi, 1); // pong	1046	send_ping (rsi, 1); // pong
869		1047
870	break;	1048	break;
871		1049
872	case vpn_packet::PT_PONG:	1050	case vpn_packet::PT_PONG:
		1051	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1052
		1053	// a PONG might mean that the other side doesn't really know
		1054	// about our desire for communication.
		1055	establish_connection ();
873	break;	1056	break;
874		1057
875	case vpn_packet::PT_RESET:	1058	case vpn_packet::PT_RESET:
876	{	1059	{
877	reset_connection ();	1060	reset_connection ();
878		1061
879	config_packet p = (config_packet ) pkt;	1062	config_packet p = (config_packet ) pkt;
880		1063
881	if (!p->chk_config ())	1064	if (!p->chk_config ())
882	{	1065	{
883	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1066	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
884	conf->nodename, (const char *)rsi);	1067	conf->nodename, (const char *)rsi);
885	connectmode = conf_node::C_DISABLED;	1068	connectmode = conf_node::C_DISABLED;
886	}	1069	}
887	else if (connectmode == conf_node::C_ALWAYS)	1070	else if (connectmode == conf_node::C_ALWAYS)
888	establish_connection ();	1071	establish_connection ();
…		…
890	break;	1073	break;
891		1074
892	case vpn_packet::PT_AUTH_REQ:	1075	case vpn_packet::PT_AUTH_REQ:
893	if (auth_rate_limiter.can (rsi))	1076	if (auth_rate_limiter.can (rsi))
894	{	1077	{
895	auth_req_packet p = (auth_req_packet ) pkt;	1078	auth_req_packet p = (auth_req_packet )pkt;
896		1079
897	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1080	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1081	conf->nodename, p->initiate ? "initiate" : "reply",
		1082	p->protocols, p->features);
898		1083
899	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1084	if (p->chk_config () && !memcmp (p->magic, MAGIC, 8))
900	{	1085	{
901	if (p->prot_minor != PROTOCOL_MINOR)	1086	if (p->prot_minor != PROTOCOL_MINOR)
902	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1087	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
903	conf->nodename, (const char *)rsi,	1088	conf->nodename, (const char *)rsi,
904	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1089	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
905		1090
906	if (p->initiate)	1091	if (p->initiate)
907	send_auth_request (rsi, false);	1092	send_auth_request (rsi, false);
908		1093
909	rsachallenge k;	1094	auth_data auth;
910		1095
911	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1096	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
912	{	1097	{
913	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1098	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
914	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1099	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
915	break;
916	}	1100	}
917	else	1101	else
918	{	1102	{
919	delete octx;	1103	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
920		1104
921	octx = new crypto_ctx (k, 1);	1105	rcv_auth = auth;
922	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1106	have_rcv_auth = true;
923		1107
924	// compatibility code, remove when no longer required	1108	send_auth_response (rsi);
925	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
926		1109
		1110	if (chg)
		1111	{
927	conf->protocols = p->protocols;	1112	conf->protocols = p->protocols;
928	features = p->features & FEATURES;	1113	features = p->features & config_packet::get_features ();
929		1114
930	send_auth_response (rsi, p->id, k);
931
932	connection_established ();	1115	connection_established (rsi);
933
934	break;	1116	}
935	}	1117	}
		1118
		1119	break;
936	}	1120	}
937	else	1121	else
938	slog (L_WARN, _("%s(%s): protocol mismatch"),	1122	slog (L_WARN, _("%s(%s): protocol mismatch."),
939	conf->nodename, (const char *)rsi);	1123	conf->nodename, (const char *)rsi);
940		1124
941	send_reset (rsi);	1125	send_reset (rsi);
942	}	1126	}
943		1127
944	break;	1128	break;
945		1129
946	case vpn_packet::PT_AUTH_RES:	1130	case vpn_packet::PT_AUTH_RES:
947	{	1131	{
948	auth_res_packet p = (auth_res_packet ) pkt;	1132	auth_res_packet p = (auth_res_packet )pkt;
949		1133
950	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1134	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
951		1135
952	if (p->chk_config ())	1136	if (p->chk_config ())
953	{	1137	{
954	if (p->prot_minor != PROTOCOL_MINOR)	1138	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
955	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
956	conf->nodename, (const char *)rsi,
957	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
958
959	rsachallenge chg;
960
961	if (!rsa_cache.find (p->id, chg))
962	{	1139	{
963	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1140	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
964	conf->nodename, (const char *)rsi);	1141	conf->nodename, (const char *)rsi);
965	break;
966	}	1142	}
967	else	1143	else if (!have_snd_auth)
968	{	1144	{
969	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1145	if (p->prot_minor != PROTOCOL_MINOR)
970		1146	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
971	if (!p->hmac_chk (cctx))
972	{
973	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
974	"could be an attack, or just corruption or a synchronization error"),
975	conf->nodename, (const char *)rsi);	1147	conf->nodename, (const char *)rsi,
976	break;	1148	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
977	}
978	else
979	{
980	rsaresponse h;
981		1149
982	rsa_hash (p->id, chg, h);
983
984	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
985	{
986	prot_minor = p->prot_minor;	1150	prot_minor = p->prot_minor;
		1151	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
987		1152
988	delete ictx; ictx = cctx;	1153	have_snd_auth = true;
989
990	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
991
992	si = rsi;
993	protocol = rsi.prot;
994
995	connection_established ();	1154	connection_established (rsi);
996
997	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
998	conf->nodename, (const char *)rsi,
999	p->prot_major, p->prot_minor);
1000
1001	if (::conf.script_node_up)
1002	run_script (run_script_cb (this, &connection::script_node_up), false);
1003
1004	break;
1005	}
1006	else
1007	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1008	conf->nodename, (const char *)rsi);
1009	}
1010
1011	delete cctx;
1012	}	1155	}
		1156
		1157	break;
1013	}	1158	}
1014	}	1159	}
1015		1160
1016	send_reset (rsi);	1161	send_reset (rsi);
1017	break;	1162	break;
…		…
1028	{	1173	{
1029	vpndata_packet p = (vpndata_packet )pkt;	1174	vpndata_packet p = (vpndata_packet )pkt;
1030		1175
1031	if (!p->hmac_chk (ictx))	1176	if (!p->hmac_chk (ictx))
1032	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"
1033	"could be an attack, or just corruption or a synchronization error"),	1178	"could be an attack, or just corruption or a synchronization error."),
1034	conf->nodename, (const char *)rsi);	1179	conf->nodename, (const char *)rsi);
1035	else	1180	else
1036	{	1181	{
1037	u32 seqno;	1182	u32 seqno;
1038	tap_packet *d = p->unpack (this, seqno);	1183	tap_packet *d = p->unpack (this, seqno);
		1184	int seqclass = iseqno.seqno_classify (seqno);
1039		1185
1040	if (iseqno.recv_ok (seqno))	1186	if (seqclass == 0) // ok
1041	{	1187	{
1042	vpn->tap->send (d);	1188	vpn->tap->send (d);
1043		1189
1044	if (si != rsi)	1190	if (si != rsi)
1045	{	1191	{
1046	// 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.)
1047	si = rsi;	1194	// {
1048
1049	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1195	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1050	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);
1051	}	1211	}
1052
1053	delete d;
1054
1055	break;
1056	}	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);
		1224	}
		1225
		1226	delete d;
		1227	break;
1057	}	1228	}
1058	}	1229	}
1059		1230
1060	send_reset (rsi);	1231	send_reset (rsi);
1061	break;	1232	break;
1062		1233
1063	case vpn_packet::PT_CONNECT_REQ:	1234	case vpn_packet::PT_CONNECT_REQ:
1064	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1235	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1065	{	1236	{
1066	connect_req_packet p = (connect_req_packet ) pkt;	1237	connect_req_packet p = (connect_req_packet )pkt;
1067		1238
1068	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 ())
1069	connection *c = vpn->conns[p->id - 1];
1070	conf->protocols = p->protocols;
1071
1072	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1073	conf->id, p->id, c->ictx && c->octx);
1074
1075	if (c->ictx && c->octx)
1076	{	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	{
1077	// send connect_info packets to both sides, in case one is	1251	// send connect_info packets to both sides, in case one is
1078	// behind a nat firewall (or both ;)	1252	// behind a nat firewall (or both ;)
1079	c->send_connect_info (conf->id, si, conf->protocols);	1253	c->send_connect_info (conf->id, si, conf->protocols);
1080	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 ();
1081	}	1258	}
1082	else	1259	else
1083	c->establish_connection ();	1260	slog (L_WARN,
		1261	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1262	p->id);
1084	}	1263	}
1085		1264
1086	break;	1265	break;
1087		1266
1088	case vpn_packet::PT_CONNECT_INFO:	1267	case vpn_packet::PT_CONNECT_INFO:
1089	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1268	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1090	{	1269	{
1091	connect_info_packet p = (connect_info_packet ) pkt;	1270	connect_info_packet p = (connect_info_packet )pkt;
1092		1271
1093	assert (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 ())
1094		1273	{
1095	connection *c = vpn->conns[p->id - 1];	1274	connection *c = vpn->conns[p->id - 1];
1096		1275
1097	c->conf->protocols = p->protocols;	1276	c->conf->protocols = p->protocols;
1098	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));
1099	p->si.upgrade_protocol (protocol, c->conf);	1278	p->si.upgrade_protocol (protocol, c->conf);
1100		1279
1101	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]",
1102	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);
1103		1288
1104	const sockinfo &dsi = forward_si (p->si);	1289	const sockinfo &dsi = forward_si (p->si);
1105		1290
1106	if (dsi.valid ())	1291	if (dsi.valid ())
1107	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);
		1297	}
		1298	else
		1299	slog (L_WARN,
		1300	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1301	p->id);
1108	}	1302	}
1109		1303
1110	break;	1304	break;
1111		1305
1112	default:	1306	default:
1113	send_reset (rsi);	1307	send_reset (rsi);
1114	break;	1308	break;
1115	}	1309	}
1116	}	1310	}
1117		1311
1118	void connection::keepalive_cb (time_watcher &w)	1312	inline void
		1313	connection::keepalive_cb (ev::timer &w, int revents)
1119	{	1314	{
1120	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)
1121	{	1320	{
1122	reset_connection ();	1321	reset_connection ();
1123	establish_connection ();	1322	establish_connection ();
1124	}	1323	}
1125	else if (NOW < last_activity + ::conf.keepalive)
1126	w.start (last_activity + ::conf.keepalive);
1127	else if (conf->connectmode != conf_node::C_ONDEMAND	1324	else if (conf->connectmode != conf_node::C_ONDEMAND
1128	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1325	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1129	{	1326	{
		1327	w.start (3);
1130	send_ping (si);	1328	send_ping (si);
1131	w.start (NOW + 5);
1132	}	1329	}
1133	else if (NOW < last_activity + ::conf.keepalive + 10)	1330	else if (when >= -10)
1134	// hold ondemand connections implicitly a few seconds longer	1331	// hold ondemand connections implicitly a few seconds longer
1135	// should delete octx, though, or something like that ;)	1332	// should delete octx, though, or something like that ;)
1136	w.start (last_activity + ::conf.keepalive + 10);	1333	w.start (when + 10);
1137	else	1334	else
1138	reset_connection ();	1335	reset_connection ();
1139	}	1336	}
1140		1337
		1338	void
1141	void connection::send_connect_request (int id)	1339	connection::send_connect_request (int id)
1142	{	1340	{
1143	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);
1144		1342
1145	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);
1146	p->hmac_set (octx);	1346	p->hmac_set (octx);
1147	send_vpn_packet (p, si);	1347	send_vpn_packet (p, si);
1148		1348
1149	delete p;	1349	delete p;
1150	}	1350	}
1151		1351
1152	void connection::script_node ()	1352	void
		1353	connection::script_init_env (const char *ext)
1153	{	1354	{
1154	vpn->script_if_up ();
1155
1156	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;
1157	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);
1158	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1371	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1159	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1372	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1160	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1373	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1161	}	1374	}
1162		1375
		1376	inline const char *
1163	const char *connection::script_node_up ()	1377	connection::script_node_up ()
1164	{	1378	{
1165	script_node ();	1379	script_init_connect_env ();
1166		1380
1167	putenv ("STATE=up");	1381	putenv ((char *)"STATE=up");
1168		1382
		1383	char *filename;
		1384	asprintf (&filename,
		1385	"%s/%s",
		1386	confbase,
1169	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1387	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1170	}
1171		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 *
1172	const char *connection::script_node_down ()	1409	connection::script_node_down ()
1173	{	1410	{
1174	script_node ();	1411	script_init_connect_env ();
1175		1412
1176	putenv ("STATE=down");	1413	putenv ((char *)"STATE=down");
1177		1414
1178	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1415	char *filename;
1179	}	1416	asprintf (&filename,
		1417	"%s/%s",
		1418	confbase,
		1419	::conf.script_node_down ? ::conf.script_node_down : "node-down");
1180		1420
		1421	return filename;
		1422	}
		1423
1181	connection::connection(struct vpn *vpn_)	1424	connection::connection (struct vpn vpn, conf_node conf)
1182	: vpn(vpn_)	1425	: vpn(vpn), conf(conf),
1183	, rekey (this, &connection::rekey_cb)	1426	#if ENABLE_DNS
1184	, keepalive (this, &connection::keepalive_cb)	1427	dns (0),
		1428	#endif
		1429	data_queue(conf->max_ttl, conf->max_queue + 1),
		1430	vpn_queue(conf->max_ttl, conf->max_queue + 1)
		1431	{
		1432	rekey .set<connection, &connection::rekey_cb > (this);
		1433	keepalive .set<connection, &connection::keepalive_cb > (this);
1185	, establish_connection (this, &connection::establish_connection_cb)	1434	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1186	{	1435
		1436	last_establish_attempt = 0.;
1187	octx = ictx = 0;	1437	octx = ictx = 0;
1188	retry_cnt = 0;
1189		1438
1190	connectmode = conf_node::C_ALWAYS; // initial setting	1439	connectmode = conf->connectmode;
		1440
		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
1191	reset_connection ();	1445	reset_connection ();
1192	}	1446	}
1193		1447
1194	connection::~connection ()	1448	connection::~connection ()
1195	{	1449	{
1196	shutdown ();	1450	shutdown ();
1197	}	1451	}
1198		1452
		1453	void
1199	void connection_init ()	1454	connection_init ()
1200	{	1455	{
1201	auth_rate_limiter.clear ();	1456	auth_rate_limiter.clear ();
1202	reset_rate_limiter.clear ();	1457	reset_rate_limiter.clear ();
1203	}	1458	}
1204		1459

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Comparing gvpe/src/connection.C (file contents): Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 UTC vs. Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC