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

Comparing gvpe/src/connection.C (file contents):
Revision 1.43 by pcg, Fri Mar 4 04:52:38 2005 UTC vs.
Revision 1.106 by root, Fri Jul 19 21:01:16 2013 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
5	This file is part of GVPE.	5	This file is part of GVPE.
6		6
7	GVPE is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
8	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
9	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
10	(at your option) any later version.	10	option) any later version.
11		11
12	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15	GNU General Public License for more details.	15	Public License for more details.
16		16
17	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
18	along with gvpe; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
19	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <cassert>
25
26	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
27		37
28	#include <openssl/rand.h>	38	#include <openssl/rand.h>
29	#include <openssl/evp.h>	39	#include <openssl/evp.h>
30	#include <openssl/rsa.h>	40	#include <openssl/rsa.h>
31	#include <openssl/err.h>	41	#include <openssl/err.h>
32
33	#include "gettext.h"
34		42
35	#include "conf.h"	43	#include "conf.h"
36	#include "slog.h"	44	#include "slog.h"
37	#include "device.h"	45	#include "device.h"
38	#include "vpn.h"	46	#include "vpn.h"
39	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
40		49
41	#include "netcompat.h"	50	#include "netcompat.h"
42		51
43	#if !HAVE_RAND_PSEUDO_BYTES
44	# define RAND_pseudo_bytes RAND_bytes
45	#endif
46
47	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	52	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
		53	#define MAGIC "HUHN\xbd\xc6\xdb\x82" // 8 bytes of magic//D
48		54
49	#define ULTRA_FAST 1	55	#define ULTRA_FAST 1
50	#define HLOG 15	56	#define HLOG 15
51	#include "lzf/lzf.h"	57	#include "lzf/lzf.h"
52	#include "lzf/lzf_c.c"	58	#include "lzf/lzf_c.c"
53	#include "lzf/lzf_d.c"	59	#include "lzf/lzf_d.c"
54		60
		61	//////////////////////////////////////////////////////////////////////////////
		62
		63	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		64	static ev::child rs_child_ev;
		65
		66	namespace
		67	{
		68	void // c++ requires external linkage here, apparently :(
		69	rs_child_cb (ev::child &w, int revents)
		70	{
		71	w.stop ();
		72
		73	if (rs_queue.empty ())
		74	return;
		75
		76	pid_t pid = run_script (*rs_queue.front ().first, false);
		77	if (pid)
		78	{
		79	w.set (pid);
		80	w.start ();
		81	}
		82	else
		83	slog (L_WARN, rs_queue.front ().second);
		84
		85	delete rs_queue.front ().first;
		86	rs_queue.pop ();
		87	}
		88	};
		89
		90	// despite the fancy name, this is quite a hack
		91	static void
		92	run_script_queued (run_script_cb cb, const char warnmsg)
		93	{
		94	rs_queue.push (std::make_pair (cb, warnmsg));
		95
		96	if (!rs_child_ev.is_active ())
		97	{
		98	rs_child_ev.set<rs_child_cb> ();
		99	rs_child_ev ();
		100	}
		101	}
		102
		103	//////////////////////////////////////////////////////////////////////////////
		104
55	struct crypto_ctx	105	struct crypto_ctx
56	{	106	{
57	EVP_CIPHER_CTX cctx;	107	EVP_CIPHER_CTX cctx;
58	HMAC_CTX hctx;	108	HMAC_CTX hctx;
59		109
60	crypto_ctx (const rsachallenge &challenge, int enc);	110	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
61	~crypto_ctx ();	111	~crypto_ctx ();
62	};	112	};
63		113
64	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	114	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
65	{	115	{
		116	ecdh_key s;
		117
		118	curve25519_combine (a, b, s);
		119
		120	{
		121	u8 mac_key[MAC_KEYSIZE];
		122	static const unsigned char mac_info[] = "gvpe mac key";
		123
		124	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		125	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		126	kdf.extract (s, sizeof (s));
		127	kdf.extract_done (HKDF_PRF_HASH ());
		128	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		129
		130	HMAC_CTX_init (&hctx);
		131	require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		132	}
		133
		134	{
		135	u8 cipher_key[CIPHER_KEYSIZE];
		136	static const unsigned char cipher_info[] = "gvpe cipher key";
		137
		138	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		139	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		140	kdf.extract (s, sizeof (s));
		141	kdf.extract_done (HKDF_PRF_HASH ());
		142	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		143
66	EVP_CIPHER_CTX_init (&cctx);	144	EVP_CIPHER_CTX_init (&cctx);
67	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	145	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
68	HMAC_CTX_init (&hctx);	146	}
69	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
70	}	147	}
71		148
72	crypto_ctx::~crypto_ctx ()	149	crypto_ctx::~crypto_ctx ()
73	{	150	{
74	require (EVP_CIPHER_CTX_cleanup (&cctx));	151	require (EVP_CIPHER_CTX_cleanup (&cctx));
75	HMAC_CTX_cleanup (&hctx);	152	HMAC_CTX_cleanup (&hctx);
76	}	153	}
77		154
		155	static inline void
		156	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		157	{
		158	if (RSA_public_encrypt (sizeof (auth.rsa),
		159	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		160	key, RSA_PKCS1_OAEP_PADDING) < 0)
		161	fatal ("RSA_public_encrypt error");
		162
		163	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		164	}
		165
		166	static inline bool
		167	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		168	{
		169	u8 rsa_decrypt[RSA_KEYLEN];
		170
		171	if (RSA_private_decrypt (sizeof (encr.rsa),
		172	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		173	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		174	return 0;
		175
		176	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		177	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		178
		179	return 1;
		180	}
		181
78	static void	182	static void
79	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	183	auth_hash (const auth_data &auth, const ecdh_key &b, auth_mac &mac)
80	{	184	{
81	EVP_MD_CTX ctx;	185	hkdf kdf (b, sizeof b, AUTH_DIGEST ()); // use response ecdh b as salt
82		186	kdf.extract (&auth.rsa, sizeof (auth.rsa));
83	EVP_MD_CTX_init (&ctx);	187	kdf.extract_done ();
84	require (EVP_DigestInit (&ctx, RSA_HASH));	188	kdf.expand (mac, sizeof mac, auth.ecdh, sizeof (auth.ecdh)); // use challenge ecdh b as info
85	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));
86	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
87	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
88	EVP_MD_CTX_cleanup (&ctx);
89	}	189	}
90		190
91	struct rsa_entry {	191	void
92	tstamp expire;	192	connection::generate_auth_data ()
93	rsaid id;
94	rsachallenge chg;
95	};
96
97	struct rsa_cache : list<rsa_entry>
98	{	193	{
99	void cleaner_cb (time_watcher &w); time_watcher cleaner;	194	if (auth_expire < ev_now ())
100
101	bool find (const rsaid &id, rsachallenge &chg)
102	{
103	for (iterator i = begin (); i != end (); ++i)
104	{
105	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)
106	{
107	memcpy (&chg, &i->chg, sizeof chg);
108
109	erase (i);
110	return true;
111	}
112	}
113
114	if (cleaner.at < NOW)
115	cleaner.start (NOW + RSA_TTL);
116
117	return false;
118	}
119
120	void gen (rsaid &id, rsachallenge &chg)
121	{
122	rsa_entry e;
123
124	RAND_bytes ((unsigned char *)&id, sizeof id);
125	RAND_bytes ((unsigned char *)&chg, sizeof chg);
126
127	e.expire = NOW + RSA_TTL;
128	e.id = id;
129	memcpy (&e.chg, &chg, sizeof chg);
130
131	push_back (e);
132
133	if (cleaner.at < NOW)
134	cleaner.start (NOW + RSA_TTL);
135	}
136
137	rsa_cache ()
138	: cleaner (this, &rsa_cache::cleaner_cb)
139	{ }	195	{
		196	// request data
		197	rand_fill (snd_auth.rsa);
		198	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
140		199
141	} rsa_cache;	200	// eventual response data
142		201	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
143	void rsa_cache::cleaner_cb (time_watcher &w)
144	{
145	if (!empty ())
146	{	202	}
147	w.start (NOW + RSA_TTL);
148		203
149	for (iterator i = begin (); i != end (); )	204	// every use prolongs the expiry
150	if (i->expire <= NOW)	205	auth_expire = ev_now () + AUTH_TTL;
151	i = erase (i);
152	else
153	++i;
154	}
155	}	206	}
156		207
157	//////////////////////////////////////////////////////////////////////////////	208	//////////////////////////////////////////////////////////////////////////////
158		209
159	void pkt_queue::put (net_packet *p)	210	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		211	: max_ttl (max_ttl), max_queue (max_queue)
160	{	212	{
161	if (queue[i])	213	queue = new pkt [max_queue];
162	{
163	delete queue[i];
164	j = (j + 1) % QUEUEDEPTH;
165	}
166		214
167	queue[i] = p;
168
169	i = (i + 1) % QUEUEDEPTH;
170	}
171
172	net_packet *pkt_queue::get ()
173	{
174	net_packet *p = queue[j];
175
176	if (p)
177	{
178	queue[j] = 0;
179	j = (j + 1) % QUEUEDEPTH;
180	}
181
182	return p;
183	}
184
185	pkt_queue::pkt_queue ()
186	{
187	memset (queue, 0, sizeof (queue));
188	i = 0;	215	i = 0;
189	j = 0;	216	j = 0;
		217
		218	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
190	}	219	}
191		220
192	pkt_queue::~pkt_queue ()	221	pkt_queue::~pkt_queue ()
193	{	222	{
194	for (i = QUEUEDEPTH; --i > 0; )	223	while (net_packet *p = get ())
		224	delete p;
		225
195	delete queue[i];	226	delete [] queue;
196	}	227	}
197		228
		229	void
		230	pkt_queue::expire_cb (ev::timer &w, int revents)
		231	{
		232	ev_tstamp expire = ev_now () - max_ttl;
		233
		234	for (;;)
		235	{
		236	if (empty ())
		237	break;
		238
		239	double diff = queue[j].tstamp - expire;
		240
		241	if (diff >= 0.)
		242	{
		243	w.start (diff > 0.5 ? diff : 0.5);
		244	break;
		245	}
		246
		247	delete get ();
		248	}
		249	}
		250
		251	void
		252	pkt_queue::put (net_packet *p)
		253	{
		254	ev_tstamp now = ev_now ();
		255
		256	// start expiry timer
		257	if (empty ())
		258	expire.start (max_ttl);
		259
		260	int ni = i + 1 == max_queue ? 0 : i + 1;
		261
		262	if (ni == j)
		263	delete get ();
		264
		265	queue[i].pkt = p;
		266	queue[i].tstamp = now;
		267
		268	i = ni;
		269	}
		270
		271	net_packet *
		272	pkt_queue::get ()
		273	{
		274	if (empty ())
		275	return 0;
		276
		277	net_packet *p = queue[j].pkt;
		278	queue[j].pkt = 0;
		279
		280	j = j + 1 == max_queue ? 0 : j + 1;
		281
		282	return p;
		283	}
		284
198	struct net_rateinfo {	285	struct net_rateinfo
		286	{
199	u32 host;	287	u32 host;
200	double pcnt, diff;	288	double pcnt, diff;
201	tstamp last;	289	tstamp last;
202	};	290	};
203		291
213		301
214	bool can (const sockinfo &si) { return can((u32)si.host); }	302	bool can (const sockinfo &si) { return can((u32)si.host); }
215	bool can (u32 host);	303	bool can (u32 host);
216	};	304	};
217		305
218	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	306	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
219		307
		308	bool
220	bool net_rate_limiter::can (u32 host)	309	net_rate_limiter::can (u32 host)
221	{	310	{
222	iterator i;	311	iterator i;
223		312
224	for (i = begin (); i != end (); )	313	for (i = begin (); i != end (); )
225	if (i->host == host)	314	if (i->host == host)
226	break;	315	break;
227	else if (i->last < NOW - NRL_EXPIRE)	316	else if (i->last < ev_now () - NRL_EXPIRE)
228	i = erase (i);	317	i = erase (i);
229	else	318	else
230	i++;	319	i++;
231		320
232	if (i == end ())	321	if (i == end ())
…		…
234	net_rateinfo ri;	323	net_rateinfo ri;
235		324
236	ri.host = host;	325	ri.host = host;
237	ri.pcnt = 1.;	326	ri.pcnt = 1.;
238	ri.diff = NRL_MAXDIF;	327	ri.diff = NRL_MAXDIF;
239	ri.last = NOW;	328	ri.last = ev_now ();
240		329
241	push_front (ri);	330	push_front (ri);
242		331
243	return true;	332	return true;
244	}	333	}
…		…
246	{	335	{
247	net_rateinfo ri (*i);	336	net_rateinfo ri (*i);
248	erase (i);	337	erase (i);
249		338
250	ri.pcnt = ri.pcnt * NRL_ALPHA;	339	ri.pcnt = ri.pcnt * NRL_ALPHA;
251	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	340	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
252		341
253	ri.last = NOW;	342	ri.last = ev_now ();
254		343
255	double dif = ri.diff / ri.pcnt;	344	double dif = ri.diff / ri.pcnt;
256		345
257	bool send = dif > NRL_CUTOFF;	346	bool send = dif > NRL_CUTOFF;
258		347
…		…
270	}	359	}
271	}	360	}
272		361
273	/////////////////////////////////////////////////////////////////////////////	362	/////////////////////////////////////////////////////////////////////////////
274		363
275	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	364	void
276
277	void hmac_packet::hmac_gen (crypto_ctx *ctx)	365	hmac_packet::hmac_gen (crypto_ctx ctx, u8 hmac_digest)
278	{	366	{
279	unsigned int xlen;
280
281	HMAC_CTX *hctx = &ctx->hctx;	367	HMAC_CTX *hctx = &ctx->hctx;
282		368
283	HMAC_Init_ex (hctx, 0, 0, 0, 0);	369	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
284	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	370	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), len - sizeof (hmac_packet)));
285	len - sizeof (hmac_packet));	371	require (HMAC_Final (hctx, hmac_digest, 0));
286	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);
287	}	372	}
288		373
289	void	374	void
290	hmac_packet::hmac_set (crypto_ctx *ctx)	375	hmac_packet::hmac_set (crypto_ctx *ctx)
291	{	376	{
292	hmac_gen (ctx);	377	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
293		378	hmac_gen (ctx, hmac_digest);
294	memcpy (hmac, hmac_digest, HMACLENGTH);	379	memcpy (hmac, hmac_digest, HMACLENGTH);
295	}	380	}
296		381
297	bool	382	bool
298	hmac_packet::hmac_chk (crypto_ctx *ctx)	383	hmac_packet::hmac_chk (crypto_ctx *ctx)
299	{	384	{
300	hmac_gen (ctx);	385	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
301		386	hmac_gen (ctx, hmac_digest);
302	return !memcmp (hmac, hmac_digest, HMACLENGTH);	387	return !memcmp (hmac, hmac_digest, HMACLENGTH);
303	}	388	}
304		389
		390	void
305	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	391	vpn_packet::set_hdr (ptype type_, unsigned int dst)
306	{	392	{
307	type = type_;	393	type = type_;
308		394
309	int src = THISNODE->id;	395	int src = THISNODE->id;
310		396
…		…
315		401
316	#define MAXVPNDATA (MAX_MTU - 6 - 6)	402	#define MAXVPNDATA (MAX_MTU - 6 - 6)
317	#define DATAHDR (sizeof (u32) + RAND_SIZE)	403	#define DATAHDR (sizeof (u32) + RAND_SIZE)
318		404
319	struct vpndata_packet : vpn_packet	405	struct vpndata_packet : vpn_packet
		406	{
		407	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		408
		409	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		410	tap_packet unpack (connection conn, u32 &seqno);
		411
		412	private:
		413	const u32 data_hdr_size () const
320	{	414	{
321	u8 data[MAXVPNDATA + DATAHDR]; // seqno
322
323	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
324	tap_packet unpack (connection conn, u32 &seqno);
325	private:
326
327	const u32 data_hdr_size () const
328	{
329	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	415	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
330	}
331	};	416	}
		417	};
332		418
333	void	419	void
334	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	420	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
335	{	421	{
336	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	422	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
338	ptype type = PT_DATA_UNCOMPRESSED;	424	ptype type = PT_DATA_UNCOMPRESSED;
339		425
340	#if ENABLE_COMPRESSION	426	#if ENABLE_COMPRESSION
341	u8 cdata[MAX_MTU];	427	u8 cdata[MAX_MTU];
342		428
343	if (conn->features & ENABLE_COMPRESSION)	429	if (conn->features & FEATURE_COMPRESSION)
344	{	430	{
345	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	431	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
346		432
347	if (cl)	433	if (cl)
348	{	434	{
…		…
354	d[1] = cl;	440	d[1] = cl;
355	}	441	}
356	}	442	}
357	#endif	443	#endif
358		444
359	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	445	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
360		446
361	struct {	447	struct {
362	#if RAND_SIZE	448	#if RAND_SIZE
363	u8 rnd[RAND_SIZE];	449	u8 rnd[RAND_SIZE];
364	#endif	450	#endif
365	u32 seqno;	451	u32 seqno;
366	} datahdr;	452	} datahdr;
367		453
368	datahdr.seqno = ntohl (seqno);	454	datahdr.seqno = ntohl (seqno);
369	#if RAND_SIZE	455	#if RAND_SIZE
370	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	456	// NB: a constant (per session) random prefix
		457	// is likely enough, but we don't take any chances.
		458	conn->oiv.get (datahdr.rnd, RAND_SIZE);
371	#endif	459	#endif
372		460
373	require (EVP_EncryptUpdate (cctx,	461	require (EVP_EncryptUpdate (cctx,
374	(unsigned char *) data + outl, &outl2,	462	(unsigned char *) data + outl, &outl2,
375	(unsigned char *) &datahdr, DATAHDR));	463	(unsigned char *) &datahdr, DATAHDR));
…		…
397	int outl = 0, outl2;	485	int outl = 0, outl2;
398	tap_packet *p = new tap_packet;	486	tap_packet *p = new tap_packet;
399	u8 *d;	487	u8 *d;
400	u32 l = len - data_hdr_size ();	488	u32 l = len - data_hdr_size ();
401		489
402	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	490	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
403		491
404	#if ENABLE_COMPRESSION	492	#if ENABLE_COMPRESSION
405	u8 cdata[MAX_MTU];	493	u8 cdata[MAX_MTU];
406		494
407	if (type == PT_DATA_COMPRESSED)	495	if (type == PT_DATA_COMPRESSED)
408	d = cdata;	496	d = cdata;
409	else	497	else
410	#endif	498	#endif
411	d = &(*p)[6 + 6 - DATAHDR];	499	d = &(*p)[6 + 6] - DATAHDR;
412		500
413	/* this overwrites part of the src mac, but we fix that later */	501	// we play do evil games with the struct layout atm.
		502	// pending better solutions, we at least do some verification.
		503	// this is fine, as we left ISO territory long ago.
		504	require (DATAHDR <= 16);
		505	require ((u8 )(&p->len + 1) == &(p)[0]);
		506
		507	// this can overwrite the len/dst/src fields
414	require (EVP_DecryptUpdate (cctx,	508	require (EVP_DecryptUpdate (cctx,
415	d, &outl2,	509	d, &outl2,
416	(unsigned char *)&data, len - data_hdr_size ()));	510	(unsigned char *)&data, len - data_hdr_size ()));
417	outl += outl2;	511	outl += outl2;
418		512
…		…
449	}	543	}
450	};	544	};
451		545
452	struct config_packet : vpn_packet	546	struct config_packet : vpn_packet
453	{	547	{
454	// actually, hmaclen cannot be checked because the hmac	548	u8 serial[SERIAL_SIZE];
455	// field comes before this data, so peers with other
456	// hmacs simply will not work.
457	u8 prot_major, prot_minor, randsize, hmaclen;	549	u8 prot_major, prot_minor, randsize;
458	u8 flags, challengelen, features, pad3;	550	u8 flags, features, pad6, pad7, pad8;
459	u32 cipher_nid, digest_nid, hmac_nid;	551	u32 cipher_nid, mac_nid, auth_nid;
460		552
461	void setup (ptype type, int dst);	553	void setup (ptype type, int dst);
462	bool chk_config () const;	554	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
463		555
464	static u8 get_features ()	556	static u8 get_features ()
465	{	557	{
466	u8 f = 0;	558	u8 f = 0;
467	#if ENABLE_COMPRESSION	559	#if ENABLE_COMPRESSION
468	f \|= FEATURE_COMPRESSION;	560	f \|= FEATURE_COMPRESSION;
469	#endif	561	#endif
470	#if ENABLE_ROHC	562	#if ENABLE_ROHC
471	f \|= FEATURE_ROHC;	563	f \|= FEATURE_ROHC;
472	#endif	564	#endif
		565	#if ENABLE_BRIDGING
		566	f \|= FEATURE_BRIDGING;
		567	#endif
473	return f;	568	return f;
474	}	569	}
475	};	570	};
476		571
		572	void
477	void config_packet::setup (ptype type, int dst)	573	config_packet::setup (ptype type, int dst)
478	{	574	{
479	prot_major = PROTOCOL_MAJOR;	575	prot_major = PROTOCOL_MAJOR;
480	prot_minor = PROTOCOL_MINOR;	576	prot_minor = PROTOCOL_MINOR;
481	randsize = RAND_SIZE;	577	randsize = RAND_SIZE;
482	hmaclen = HMACLENGTH;	578	flags = 0;
483	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
484	challengelen = sizeof (rsachallenge);
485	features = get_features ();	579	features = get_features ();
486		580
		581	strncpy ((char *)serial, conf.serial, sizeof (serial));
		582
487	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	583	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
488	digest_nid = htonl (EVP_MD_type (RSA_HASH));
489	hmac_nid = htonl (EVP_MD_type (DIGEST));	584	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		585	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
490		586
491	len = sizeof (*this) - sizeof (net_packet);	587	len = sizeof (*this) - sizeof (net_packet);
492	set_hdr (type, dst);	588	set_hdr (type, dst);
493	}	589	}
494		590
495	bool config_packet::chk_config () const	591	bool
		592	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
496	{	593	{
497	if (prot_major != PROTOCOL_MAJOR)	594	if (prot_major != PROTOCOL_MAJOR)
498	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	595	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		596	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
499	else if (randsize != RAND_SIZE)	597	else if (randsize != RAND_SIZE)
500	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	598	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
501	else if (hmaclen != HMACLENGTH)	599	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
502	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
503	#if 0 // this implementation should handle all flag settings
504	else if (flags != curflags ())
505	slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ());
506	#endif
507	else if (challengelen != sizeof (rsachallenge))
508	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
509	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	600	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
510	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	601	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
511	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	602	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
512	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
513	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	603	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
514	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	604	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		605	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		606	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		607	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		608	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
515	else	609	else
		610	{
		611	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		612
		613	if (cmp > 0)
		614	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		615	conf->nodename, (const char *)rsi);
		616	else if (cmp == 0)
516	return true;	617	return true;
		618	}
517		619
518	return false;	620	return false;
519	}	621	}
520		622
521	struct auth_req_packet : config_packet	623	struct auth_req_packet : config_packet // UNPROTECTED
522	{	624	{
523	char magic[8];	625	char magic[8];
524	u8 initiate; // false if this is just an automatic reply	626	u8 initiate; // false if this is just an automatic reply
525	u8 protocols; // supported protocols (will be patched on forward)	627	u8 protocols; // supported protocols (will be patched on forward)
526	u8 pad2, pad3;	628	u8 pad2, pad3;
527	rsaid id;	629	auth_encr encr;
528	rsaencrdata encr;
529		630
530	auth_req_packet (int dst, bool initiate_, u8 protocols_)	631	auth_req_packet (int dst, bool initiate_, u8 protocols_)
531	{	632	{
532	config_packet::setup (PT_AUTH_REQ, dst);	633	config_packet::setup (PT_AUTH_REQ, dst);
533	strncpy (magic, MAGIC, 8);	634	memcpy (magic, MAGIC, 8);
534	initiate = !!initiate_;	635	initiate = !!initiate_;
535	protocols = protocols_;	636	protocols = protocols_;
536		637
537	len = sizeof (*this) - sizeof (net_packet);	638	len = sizeof (*this) - sizeof (net_packet);
538	}	639	}
539	};	640	};
540		641
541	struct auth_res_packet : config_packet	642	struct auth_res_packet : vpn_packet // UNPROTECTED
542	{	643	{
543	rsaid id;
544	u8 pad1, pad2, pad3;
545	u8 response_len; // encrypted length
546	rsaresponse response;	644	auth_response response;
547		645
548	auth_res_packet (int dst)	646	auth_res_packet (int dst)
549	{	647	{
550	config_packet::setup (PT_AUTH_RES, dst);	648	set_hdr (PT_AUTH_RES, dst);
551		649
552	len = sizeof (*this) - sizeof (net_packet);	650	len = sizeof (*this) - sizeof (net_packet);
553	}	651	}
554	};	652	};
555		653
…		…
585	};	683	};
586		684
587	/////////////////////////////////////////////////////////////////////////////	685	/////////////////////////////////////////////////////////////////////////////
588		686
589	void	687	void
590	connection::connection_established ()	688	connection::connection_established (const sockinfo &rsi)
591	{	689	{
		690	if (!have_snd_auth \|\| !have_rcv_auth)
		691	return;
		692
		693	si = rsi;
		694	protocol = rsi.prot;
		695
		696	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		697	conf->nodename, (const char *)rsi,
		698	is_direct ? "direct" : "forwarded",
		699	PROTOCOL_MAJOR, prot_minor);
		700
		701	if (::conf.script_node_up)
		702	{
		703	run_script_cb *cb = new run_script_cb;
		704	cb->set<connection, &connection::script_node_up> (this);
		705	run_script_queued (cb, _("node-up command execution failed, continuing."));
		706	}
		707
		708	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		709	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		710
		711	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		712	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		713
		714	oiv.reset ();
		715
		716	// make sure rekeying timeouts are slightly asymmetric
		717	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		718	rekey.start (rekey_interval, rekey_interval);
		719
		720	keepalive.start (::conf.keepalive);
		721
		722	// send queued packets
592	if (ictx && octx)	723	if (ictx && octx)
593	{	724	{
594	connectmode = conf->connectmode;	725	while (tap_packet p = (tap_packet )data_queue.get ())
595
596	// make sure rekeying timeouts are slightly asymmetric
597	rekey.start (NOW + ::conf.rekey
598	+ (conf->id > THISNODE->id ? 10 : 0));
599	keepalive.start (NOW + ::conf.keepalive);
600
601	// send queued packets
602	if (ictx && octx)
603	{	726	{
604	while (tap_packet p = (tap_packet )data_queue.get ())
605	{
606	send_data_packet (p);	727	if (p->len) send_data_packet (p);
607	delete p;	728	delete p;
608	}
609
610	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
611	{
612	send_vpn_packet (p, si, IPTOS_RELIABILITY);
613	delete p;
614	}
615	}	729	}
		730
		731	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		732	{
		733	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
		734	delete p;
		735	}
616	}	736	}
		737
		738	vpn->connection_established (this);
		739	}
		740
		741	void
		742	connection::reset_si ()
		743	{
		744	if (vpn->can_direct (THISNODE, conf))
		745	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
617	else	746	else
618	{	747	{
619	retry_cnt = 0;	748	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
620	establish_connection.start (NOW + 5);	749	protocol = 0;
621	keepalive.stop ();
622	rekey.stop ();
623	}	750	}
624	}
625
626	void
627	connection::reset_si ()
628	{
629	protocol = best_protocol (THISNODE->protocols & conf->protocols);
630
631	// mask out protocols we cannot establish
632	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
633	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
634	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
635		751
636	si.set (conf, protocol);	752	si.set (conf, protocol);
		753
		754	is_direct = si.valid ();
637	}	755	}
638		756
639	// ensure sockinfo is valid, forward if necessary	757	// ensure sockinfo is valid, forward if necessary
640	const sockinfo &	758	const sockinfo &
641	connection::forward_si (const sockinfo &si) const	759	connection::forward_si (const sockinfo &si) const
642	{	760	{
643	if (!si.valid ())	761	if (!si.valid ())
644	{	762	{
645	connection *r = vpn->find_router ();	763	connection *r = vpn->find_router_for (this);
646		764
647	if (r)	765	if (r)
648	{	766	{
649	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	767	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
650	conf->nodename, r->conf->nodename);	768	conf->nodename, r->conf->nodename);
651	return r->si;	769	return r->si;
652	}	770	}
653	else	771	else
654	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	772	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
655	conf->nodename);	773	conf->nodename);
656	}	774	}
657		775
658	return si;	776	return si;
659	}	777	}
660		778
661	void	779	void
662	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	780	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
663	{	781	{
664	bool ok;	782	if (!vpn->send_vpn_packet (pkt, si, tos))
665
666	switch (si.prot)
667	{
668	case PROT_IPv4:
669	ok = vpn->send_ipv4_packet (pkt, si, tos); break;
670	case PROT_UDPv4:
671	ok = vpn->send_udpv4_packet (pkt, si, tos); break;
672	#if ENABLE_TCP
673	case PROT_TCPv4:
674	ok = vpn->send_tcpv4_packet (pkt, si, tos); break;
675	#endif
676	#if ENABLE_ICMP
677	case PROT_ICMPv4:
678	ok = vpn->send_icmpv4_packet (pkt, si, tos); break;
679	#endif
680	#if ENABLE_DNS
681	case PROT_DNSv4:
682	ok = send_dnsv4_packet (pkt, si, tos); break;
683	#endif
684
685	default:
686	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
687	ok = false;
688	}
689
690	if (!ok)
691	reset_connection ();	783	reset_connection ();
692	}	784	}
693		785
694	void	786	void
695	connection::send_ping (const sockinfo &si, u8 pong)	787	connection::send_ping (const sockinfo &si, u8 pong)
696	{	788	{
697	ping_packet *pkt = new ping_packet;	789	ping_packet *pkt = new ping_packet;
698		790
699	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	791	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		792
		793	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
700	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	794	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
701		795
702	delete pkt;	796	delete pkt;
703	}	797	}
704		798
…		…
719	void	813	void
720	connection::send_auth_request (const sockinfo &si, bool initiate)	814	connection::send_auth_request (const sockinfo &si, bool initiate)
721	{	815	{
722	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	816	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
723		817
724	rsachallenge chg;	818	generate_auth_data ();
725	rsa_cache.gen (pkt->id, chg);
726	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	819	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
727		820
728	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	821	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
729
730	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	822	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
731		823
732	delete pkt;	824	delete pkt;
733	}	825	}
734		826
735	void	827	void
736	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	828	connection::send_auth_response (const sockinfo &si)
737	{	829	{
738	auth_res_packet *pkt = new auth_res_packet (conf->id);	830	auth_res_packet *pkt = new auth_res_packet (conf->id);
739		831
740	pkt->id = id;	832	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof rcv_ecdh_b);
		833	auth_hash (rcv_auth, rcv_ecdh_b, pkt->response.mac);
741		834
742	rsa_hash (id, chg, pkt->response);
743
744	pkt->hmac_set (octx);
745
746	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	835	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
747
748	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	836	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
749		837
750	delete pkt;	838	delete pkt;
751	}	839	}
752		840
753	void	841	void
754	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	842	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
755	{	843	{
756	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	844	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
757	conf->id, rid, (const char *)rsi);	845	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		846	conf->protocols);
758		847
759	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	848	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
760		849
761	r->hmac_set (octx);	850	r->hmac_set (octx);
762	send_vpn_packet (r, si);	851	send_vpn_packet (r, si);
763		852
764	delete r;	853	delete r;
765	}	854	}
766		855
767	void	856	inline void
768	connection::establish_connection_cb (time_watcher &w)	857	connection::establish_connection_cb (ev::timer &w, int revents)
769	{	858	{
770	if (!ictx	859	if (!(ictx && octx)
771	&& conf != THISNODE	860	&& conf != THISNODE
772	&& connectmode != conf_node::C_NEVER	861	&& connectmode != conf_node::C_NEVER
773	&& connectmode != conf_node::C_DISABLED	862	&& connectmode != conf_node::C_DISABLED
774	&& NOW > w.at)	863	&& !w.is_active ())
775	{	864	{
776	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	865	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
777		866	// and stop trying. should probably be handled by a per-connection expire handler.
778	if (retry_int < conf->max_retry)	867	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		868	{
		869	reset_connection ();
779	retry_cnt++;	870	return;
780	else	871	}
781	retry_int = conf->max_retry;
782		872
783	w.start (NOW + retry_int);	873	last_establish_attempt = ev_now ();
		874
		875	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		876	? (retry_cnt & 3) + 1
		877	: 1 << (retry_cnt >> 2));
784		878
785	reset_si ();	879	reset_si ();
786		880
787	if (si.prot && !si.host)	881	bool slow = si.prot & PROT_SLOW;
		882
		883	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		884	{
		885	/TODO/ /* start the timer so we don't recurse endlessly */
		886	w.start (1);
788	vpn->send_connect_request (conf->id);	887	vpn->send_connect_request (this);
		888	}
789	else	889	else
790	{	890	{
		891	if (si.valid ())
		892	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		893	conf->nodename, (const char *)si);
		894
791	const sockinfo &dsi = forward_si (si);	895	const sockinfo &dsi = forward_si (si);
		896
		897	slow = slow \|\| (dsi.prot & PROT_SLOW);
792		898
793	if (dsi.valid () && auth_rate_limiter.can (dsi))	899	if (dsi.valid () && auth_rate_limiter.can (dsi))
794	{	900	{
795	if (retry_cnt < 4)	901	if (retry_cnt < 4)
796	send_auth_request (dsi, true);	902	send_auth_request (dsi, true);
797	else	903	else
798	send_ping (dsi, 0);	904	send_ping (dsi, 0);
799	}	905	}
800	}	906	}
		907
		908	retry_int *= slow ? 8. : 0.9;
		909
		910	if (retry_int < conf->max_retry)
		911	retry_cnt++;
		912	else
		913	retry_int = conf->max_retry;
		914
		915	w.start (retry_int);
801	}	916	}
802	}	917	}
803		918
804	void	919	void
805	connection::reset_connection ()	920	connection::reset_connection ()
…		…
808	{	923	{
809	slog (L_INFO, _("%s(%s): connection lost"),	924	slog (L_INFO, _("%s(%s): connection lost"),
810	conf->nodename, (const char *)si);	925	conf->nodename, (const char *)si);
811		926
812	if (::conf.script_node_down)	927	if (::conf.script_node_down)
813	run_script (run_script_cb (this, &connection::script_node_down), false);	928	{
		929	run_script_cb *cb = new run_script_cb;
		930	cb->set<connection, &connection::script_node_down> (this);
		931	run_script_queued (cb, _("node-down command execution failed, continuing."));
		932	}
814	}	933	}
815		934
816	delete ictx; ictx = 0;	935	delete ictx; ictx = 0;
817	delete octx; octx = 0;	936	delete octx; octx = 0;
818		937
819	si.host = 0;	938	si.host = 0;
820		939
		940	have_snd_auth = false;
		941	have_rcv_auth = false;
		942	auth_expire = 0.;
		943
821	last_activity = 0;	944	last_activity = 0.;
		945	//last_si_change = 0.;
822	retry_cnt = 0;	946	retry_cnt = 0;
823		947
824	rekey.stop ();	948	rekey.stop ();
825	keepalive.stop ();	949	keepalive.stop ();
826	establish_connection.stop ();	950	establish_connection.stop ();
…		…
833	send_reset (si);	957	send_reset (si);
834		958
835	reset_connection ();	959	reset_connection ();
836	}	960	}
837		961
838	void	962	// poor-man's rekeying
839	connection::rekey_cb (time_watcher &w)	963	inline void
		964	connection::rekey_cb (ev::timer &w, int revents)
840	{	965	{
841	reset_connection ();	966	reset_connection ();
842	establish_connection ();	967	establish_connection ();
843	}	968	}
844		969
…		…
860	if (oseqno > MAX_SEQNO)	985	if (oseqno > MAX_SEQNO)
861	rekey ();	986	rekey ();
862	}	987	}
863		988
864	void	989	void
		990	connection::post_inject_queue ()
		991	{
		992	// force a connection every now and when when packets are sent (max 1/s)
		993	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		994	establish_connection.stop ();
		995
		996	establish_connection ();
		997	}
		998
		999	void
865	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1000	connection::inject_data_packet (tap_packet *pkt)
866	{	1001	{
867	if (ictx && octx)	1002	if (ictx && octx)
868	send_data_packet (pkt);	1003	send_data_packet (pkt);
869	else	1004	else
870	{	1005	{
871	if (!broadcast)//DDDD
872	data_queue.put (new tap_packet (*pkt));	1006	data_queue.put (new tap_packet (*pkt));
873		1007	post_inject_queue ();
874	establish_connection ();
875	}	1008	}
876	}	1009	}
877		1010
		1011	void
878	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1012	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
879	{	1013	{
880	if (ictx && octx)	1014	if (ictx && octx)
881	send_vpn_packet (pkt, si, tos);	1015	send_vpn_packet (pkt, si, tos);
882	else	1016	else
883	{	1017	{
884	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1018	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
885		1019	post_inject_queue ();
886	establish_connection ();
887	}	1020	}
888	}	1021	}
889		1022
890	void	1023	void
891	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1024	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
892	{	1025	{
893	last_activity = NOW;	1026	last_activity = ev_now ();
894		1027
895	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1028	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
896	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1029	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1030
		1031	if (connectmode == conf_node::C_DISABLED)
		1032	return;
897		1033
898	switch (pkt->typ ())	1034	switch (pkt->typ ())
899	{	1035	{
900	case vpn_packet::PT_PING:	1036	case vpn_packet::PT_PING:
		1037	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1038
901	// we send pings instead of auth packets after some retries,	1039	// we send pings instead of auth packets after some retries,
902	// so reset the retry counter and establish a connection	1040	// so reset the retry counter and establish a connection
903	// when we receive a ping.	1041	// when we receive a ping.
904	if (!ictx)	1042	if (!ictx)
905	{	1043	{
906	if (auth_rate_limiter.can (rsi))	1044	if (auth_rate_limiter.can (rsi))
907	send_auth_request (rsi, true);	1045	send_auth_request (rsi, true);
908	}	1046	}
909	else	1047	else
		1048	// we would love to change the socket address here, but ping's aren't
		1049	// authenticated, so we best ignore it.
910	send_ping (rsi, 1); // pong	1050	send_ping (rsi, 1); // pong
911		1051
912	break;	1052	break;
913		1053
914	case vpn_packet::PT_PONG:	1054	case vpn_packet::PT_PONG:
		1055	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1056
		1057	// a PONG might mean that the other side doesn't really know
		1058	// about our desire for communication.
		1059	establish_connection ();
915	break;	1060	break;
916		1061
917	case vpn_packet::PT_RESET:	1062	case vpn_packet::PT_RESET:
918	{	1063	{
919	reset_connection ();	1064	reset_connection ();
920		1065
921	config_packet p = (config_packet ) pkt;	1066	config_packet p = (config_packet ) pkt;
922		1067
923	if (!p->chk_config ())	1068	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
924	{
925	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
926	conf->nodename, (const char *)rsi);
927	connectmode = conf_node::C_DISABLED;
928	}
929	else if (connectmode == conf_node::C_ALWAYS)
930	establish_connection ();	1069	establish_connection ();
931	}	1070	}
932	break;	1071	break;
933		1072
934	case vpn_packet::PT_AUTH_REQ:	1073	case vpn_packet::PT_AUTH_REQ:
935	if (auth_rate_limiter.can (rsi))	1074	if (auth_rate_limiter.can (rsi))
936	{	1075	{
937	auth_req_packet p = (auth_req_packet ) pkt;	1076	auth_req_packet p = (auth_req_packet )pkt;
938		1077
939	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1078	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1079	conf->nodename, p->initiate ? "initiate" : "reply",
		1080	p->protocols, p->features);
940		1081
941	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1082	if (memcmp (p->magic, MAGIC, 8))
		1083	{
		1084	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1085	conf->nodename, (const char *)rsi);
		1086	}
		1087	else if (p->chk_config (conf, rsi))
942	{	1088	{
943	if (p->prot_minor != PROTOCOL_MINOR)	1089	if (p->prot_minor != PROTOCOL_MINOR)
944	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1090	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
945	conf->nodename, (const char *)rsi,	1091	conf->nodename, (const char *)rsi,
946	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1092	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
947		1093
948	if (p->initiate)	1094	if (p->initiate)
949	send_auth_request (rsi, false);	1095	send_auth_request (rsi, false);
950		1096
951	rsachallenge k;	1097	auth_data auth;
952		1098
953	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1099	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
954	{	1100	{
955	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1101	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
956	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1102	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
957	break;
958	}	1103	}
959	else	1104	else
960	{	1105	{
961	delete octx;	1106	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
962		1107
963	octx = new crypto_ctx (k, 1);	1108	rcv_auth = auth;
964	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1109	have_rcv_auth = true;
965		1110
966	// compatibility code, remove when no longer required	1111	send_auth_response (rsi);
967	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
968		1112
		1113	if (chg)
		1114	{
969	conf->protocols = p->protocols;	1115	conf->protocols = p->protocols;
970	features = p->features & config_packet::get_features ();	1116	features = p->features & config_packet::get_features ();
971		1117
972	send_auth_response (rsi, p->id, k);
973
974	connection_established ();	1118	connection_established (rsi);
975
976	break;	1119	}
977	}	1120	}
		1121
		1122	break;
978	}	1123	}
979	else
980	slog (L_WARN, _("%s(%s): protocol mismatch"),
981	conf->nodename, (const char *)rsi);
982		1124
983	send_reset (rsi);	1125	send_reset (rsi);
984	}	1126	}
985		1127
986	break;	1128	break;
987		1129
988	case vpn_packet::PT_AUTH_RES:	1130	case vpn_packet::PT_AUTH_RES:
989	{	1131	{
990	auth_res_packet p = (auth_res_packet ) pkt;	1132	auth_res_packet p = (auth_res_packet )pkt;
991		1133
992	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1134	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
993		1135
994	if (p->chk_config ())	1136	auth_mac local_mac;
		1137	auth_hash (snd_auth, p->response.ecdh, local_mac);
		1138
		1139	if (memcmp (&p->response.mac, local_mac, sizeof local_mac))
995	{	1140	{
996	if (p->prot_minor != PROTOCOL_MINOR)
997	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
998	conf->nodename, (const char *)rsi,
999	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
1000
1001	rsachallenge chg;
1002
1003	if (!rsa_cache.find (p->id, chg))
1004	{
1005	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1141	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
1006	conf->nodename, (const char *)rsi);	1142	conf->nodename, (const char *)rsi);
1007	break;
1008	}	1143	}
1009	else	1144	else if (!have_snd_auth)
1010	{	1145	{
1011	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1146	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
1012		1147
1013	if (!p->hmac_chk (cctx))	1148	have_snd_auth = true;
1014	{
1015	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1016	"could be an attack, or just corruption or a synchronization error"),
1017	conf->nodename, (const char *)rsi);
1018	break;
1019	}
1020	else
1021	{
1022	rsaresponse h;
1023
1024	rsa_hash (p->id, chg, h);
1025
1026	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1027	{
1028	prot_minor = p->prot_minor;
1029
1030	delete ictx; ictx = cctx;
1031
1032	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1033
1034	si = rsi;
1035	protocol = rsi.prot;
1036
1037	connection_established ();	1149	connection_established (rsi);
1038
1039	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1040	conf->nodename, (const char *)rsi,
1041	p->prot_major, p->prot_minor);
1042
1043	if (::conf.script_node_up)
1044	run_script (run_script_cb (this, &connection::script_node_up), false);
1045
1046	break;
1047	}
1048	else
1049	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1050	conf->nodename, (const char *)rsi);
1051	}
1052
1053	delete cctx;
1054	}
1055	}	1150	}
1056	}	1151	}
1057
1058	send_reset (rsi);
1059	break;	1152	break;
1060		1153
1061	case vpn_packet::PT_DATA_COMPRESSED:	1154	case vpn_packet::PT_DATA_COMPRESSED:
1062	#if !ENABLE_COMPRESSION	1155	#if !ENABLE_COMPRESSION
1063	send_reset (rsi);	1156	send_reset (rsi);
…		…
1070	{	1163	{
1071	vpndata_packet p = (vpndata_packet )pkt;	1164	vpndata_packet p = (vpndata_packet )pkt;
1072		1165
1073	if (!p->hmac_chk (ictx))	1166	if (!p->hmac_chk (ictx))
1074	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1167	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1075	"could be an attack, or just corruption or a synchronization error"),	1168	"could be an attack, or just corruption or a synchronization error."),
1076	conf->nodename, (const char *)rsi);	1169	conf->nodename, (const char *)rsi);
1077	else	1170	else
1078	{	1171	{
1079	u32 seqno;	1172	u32 seqno;
1080	tap_packet *d = p->unpack (this, seqno);	1173	tap_packet *d = p->unpack (this, seqno);
		1174	int seqclass = iseqno.seqno_classify (seqno);
1081		1175
1082	if (iseqno.recv_ok (seqno))	1176	if (seqclass == 0) // ok
1083	{	1177	{
1084	vpn->tap->send (d);	1178	vpn->tap->send (d);
1085		1179
1086	if (si != rsi)	1180	if (si != rsi)
1087	{	1181	{
1088	// fast re-sync on connection changes, useful especially for tcp/ip	1182	// fast re-sync on source address changes, useful especially for tcp/ip
		1183	//if (last_si_change < ev_now () + 5.)
1089	si = rsi;	1184	// {
1090
1091	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1185	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1092	conf->nodename, (const char )si, (const char )rsi);	1186	conf->nodename, (const char )si, (const char )rsi);
		1187
		1188	si = rsi;
		1189
		1190	if (::conf.script_node_change)
		1191	{
		1192	run_script_cb *cb = new run_script_cb;
		1193	cb->set<connection, &connection::script_node_change> (this);
		1194	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1195	}
		1196
		1197	// }
		1198	//else
		1199	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1200	// conf->nodename, (const char )si, (const char )rsi);
1093	}	1201	}
		1202	}
		1203	else if (seqclass == 1) // far history
		1204	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1205	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1206	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1207	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1208	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1209	else if (seqclass == 3) // reset
		1210	{
		1211	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1212	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1213	send_reset (rsi);
1094	}	1214	}
1095		1215
1096	delete d;	1216	delete d;
1097	break;	1217	break;
1098	}	1218	}
…		…
1102	break;	1222	break;
1103		1223
1104	case vpn_packet::PT_CONNECT_REQ:	1224	case vpn_packet::PT_CONNECT_REQ:
1105	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1225	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1106	{	1226	{
1107	connect_req_packet p = (connect_req_packet ) pkt;	1227	connect_req_packet p = (connect_req_packet )pkt;
1108		1228
1109	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1229	if (p->id > 0 && p->id <= vpn->conns.size ())
1110	connection *c = vpn->conns[p->id - 1];
1111	conf->protocols = p->protocols;
1112
1113	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1114	conf->id, p->id, c->ictx && c->octx);
1115
1116	if (c->ictx && c->octx)
1117	{	1230	{
		1231	connection *c = vpn->conns[p->id - 1];
		1232	conf->protocols = p->protocols;
		1233
		1234	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1235	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1236	p->protocols,
		1237	c->ictx && c->octx);
		1238
		1239	if (c->ictx && c->octx)
		1240	{
1118	// send connect_info packets to both sides, in case one is	1241	// send connect_info packets to both sides, in case one is
1119	// behind a nat firewall (or both ;)	1242	// behind a nat firewall (or both ;)
1120	c->send_connect_info (conf->id, si, conf->protocols);	1243	c->send_connect_info (conf->id, si, conf->protocols);
1121	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1244	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1245	}
		1246	else
		1247	c->establish_connection ();
1122	}	1248	}
1123	else	1249	else
1124	c->establish_connection ();	1250	slog (L_WARN,
		1251	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1252	p->id);
1125	}	1253	}
1126		1254
1127	break;	1255	break;
1128		1256
1129	case vpn_packet::PT_CONNECT_INFO:	1257	case vpn_packet::PT_CONNECT_INFO:
1130	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1258	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1131	{	1259	{
1132	connect_info_packet p = (connect_info_packet )pkt;	1260	connect_info_packet p = (connect_info_packet )pkt;
1133		1261
1134	if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything	1262	if (p->id > 0 && p->id <= vpn->conns.size ())
1135	{	1263	{
1136	connection *c = vpn->conns[p->id - 1];	1264	connection *c = vpn->conns[p->id - 1];
1137		1265
1138	c->conf->protocols = p->protocols;	1266	c->conf->protocols = p->protocols;
1139	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1267	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1140	p->si.upgrade_protocol (protocol, c->conf);	1268	p->si.upgrade_protocol (protocol, c->conf);
1141		1269
1142	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1270	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1143	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1271	conf->nodename,
		1272	vpn->conns[p->id - 1]->conf->nodename,
		1273	(const char *)p->si,
		1274	p->protocols,
		1275	protocol,
		1276	p->si.supported_protocols (c->conf),
		1277	!c->ictx && !c->octx);
1144		1278
1145	const sockinfo &dsi = forward_si (p->si);	1279	const sockinfo &dsi = forward_si (p->si);
1146		1280
1147	if (dsi.valid ())	1281	if (dsi.valid ())
1148	c->send_auth_request (dsi, true);	1282	c->send_auth_request (dsi, true);
		1283	else
		1284	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1285	vpn->conns[p->id - 1]->conf->nodename,
		1286	(const char *)p->si);
1149	}	1287	}
		1288	else
		1289	slog (L_WARN,
		1290	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1291	p->id);
1150	}	1292	}
1151		1293
1152	break;	1294	break;
1153		1295
1154	default:	1296	default:
1155	send_reset (rsi);	1297	send_reset (rsi);
1156	break;	1298	break;
1157	}	1299	}
1158	}	1300	}
1159		1301
1160	void connection::keepalive_cb (time_watcher &w)	1302	inline void
		1303	connection::keepalive_cb (ev::timer &w, int revents)
1161	{	1304	{
1162	if (NOW >= last_activity + ::conf.keepalive + 30)	1305	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1306
		1307	if (when >= 0)
		1308	w.start (when);
		1309	else if (when < -15)
1163	{	1310	{
1164	reset_connection ();	1311	reset_connection ();
1165	establish_connection ();	1312	establish_connection ();
1166	}	1313	}
1167	else if (NOW < last_activity + ::conf.keepalive)
1168	w.start (last_activity + ::conf.keepalive);
1169	else if (conf->connectmode != conf_node::C_ONDEMAND	1314	else if (conf->connectmode != conf_node::C_ONDEMAND
1170	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1315	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1171	{	1316	{
		1317	w.start (3);
1172	send_ping (si);	1318	send_ping (si);
1173	w.start (NOW + 5);
1174	}	1319	}
1175	else if (NOW < last_activity + ::conf.keepalive + 10)	1320	else if (when >= -10)
1176	// hold ondemand connections implicitly a few seconds longer	1321	// hold ondemand connections implicitly a few seconds longer
1177	// should delete octx, though, or something like that ;)	1322	// should delete octx, though, or something like that ;)
1178	w.start (last_activity + ::conf.keepalive + 10);	1323	w.start (when + 10);
1179	else	1324	else
1180	reset_connection ();	1325	reset_connection ();
1181	}	1326	}
1182		1327
		1328	void
1183	void connection::send_connect_request (int id)	1329	connection::send_connect_request (int id)
1184	{	1330	{
1185	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1331	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1186		1332
1187	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1333	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1334	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1335	THISNODE->protocols);
1188	p->hmac_set (octx);	1336	p->hmac_set (octx);
1189	send_vpn_packet (p, si);	1337	send_vpn_packet (p, si);
1190		1338
1191	delete p;	1339	delete p;
1192	}	1340	}
1193		1341
1194	void connection::script_node ()	1342	void
		1343	connection::script_init_env (const char *ext)
1195	{	1344	{
1196	vpn->script_if_up ();
1197
1198	char *env;	1345	char *env;
		1346	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1347	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1348	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1349	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1350	conf->id & 0xff); putenv (env);
		1351	}
		1352
		1353	void
		1354	connection::script_init_connect_env ()
		1355	{
		1356	vpn->script_init_env ();
		1357
		1358	char *env;
1199	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1359	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1360	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1200	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1361	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1201	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1362	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1202	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1363	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1203	}	1364	}
1204		1365
		1366	inline const char *
1205	const char *connection::script_node_up ()	1367	connection::script_node_up ()
1206	{	1368	{
1207	script_node ();	1369	script_init_connect_env ();
1208		1370
1209	putenv ("STATE=up");	1371	putenv ((char *)"STATE=up");
1210		1372
		1373	char *filename;
		1374	asprintf (&filename,
		1375	"%s/%s",
		1376	confbase,
1211	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1377	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1212	}
1213		1378
		1379	return filename;
		1380	}
		1381
		1382	inline const char *
		1383	connection::script_node_change ()
		1384	{
		1385	script_init_connect_env ();
		1386
		1387	putenv ((char *)"STATE=change");
		1388
		1389	char *filename;
		1390	asprintf (&filename,
		1391	"%s/%s",
		1392	confbase,
		1393	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1394
		1395	return filename;
		1396	}
		1397
		1398	inline const char *
1214	const char *connection::script_node_down ()	1399	connection::script_node_down ()
1215	{	1400	{
1216	script_node ();	1401	script_init_connect_env ();
1217		1402
1218	putenv ("STATE=down");	1403	putenv ((char *)"STATE=down");
1219		1404
1220	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1405	char *filename;
		1406	asprintf (&filename,
		1407	"%s/%s",
		1408	confbase,
		1409	::conf.script_node_down ? ::conf.script_node_down : "node-down");
		1410
		1411	return filename;
1221	}	1412	}
1222		1413
1223	connection::connection (struct vpn vpn, conf_node conf)	1414	connection::connection (struct vpn vpn, conf_node conf)
1224	: vpn(vpn), conf(conf)	1415	: vpn(vpn), conf(conf),
1225	, rekey (this, &connection::rekey_cb)
1226	, keepalive (this, &connection::keepalive_cb)
1227	, establish_connection (this, &connection::establish_connection_cb)
1228	#if ENABLE_DNS	1416	#if ENABLE_DNS
1229	, dns (0)	1417	dns (0),
1230	#endif	1418	#endif
		1419	data_queue(conf->max_ttl, conf->max_queue + 1),
		1420	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1231	{	1421	{
		1422	rekey .set<connection, &connection::rekey_cb > (this);
		1423	keepalive .set<connection, &connection::keepalive_cb > (this);
		1424	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1425
		1426	last_establish_attempt = 0.;
1232	octx = ictx = 0;	1427	octx = ictx = 0;
1233	retry_cnt = 0;
1234		1428
1235	if (!conf->protocols) // make sure some protocol is enabled	1429	connectmode = conf->connectmode;
1236	conf->protocols = PROT_UDPv4;
1237		1430
1238	connectmode = conf_node::C_ALWAYS; // initial setting	1431	// queue a dummy packet to force an initial connection attempt
		1432	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1433	vpn_queue.put (new net_packet);
		1434
1239	reset_connection ();	1435	reset_connection ();
1240	}	1436	}
1241		1437
1242	connection::~connection ()	1438	connection::~connection ()
1243	{	1439	{
1244	shutdown ();	1440	shutdown ();
1245	}	1441	}
1246		1442
		1443	void
1247	void connection_init ()	1444	connection_init ()
1248	{	1445	{
1249	auth_rate_limiter.clear ();	1446	auth_rate_limiter.clear ();
1250	reset_rate_limiter.clear ();	1447	reset_rate_limiter.clear ();
1251	}	1448	}
1252		1449

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Comparing gvpe/src/connection.C (file contents): Revision 1.43 by pcg, Fri Mar 4 04:52:38 2005 UTC vs. Revision 1.106 by root, Fri Jul 19 21:01:16 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.43 by pcg, Fri Mar 4 04:52:38 2005 UTC vs.
Revision 1.106 by root, Fri Jul 19 21:01:16 2013 UTC