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

Comparing gvpe/src/connection.C (file contents):
Revision 1.42 by pcg, Thu Mar 3 16:54:34 2005 UTC vs.
Revision 1.107 by root, Fri Sep 20 11:57:03 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
		38	#include <openssl/opensslv.h>
28	#include <openssl/rand.h>	39	#include <openssl/rand.h>
29	#include <openssl/evp.h>	40	#include <openssl/evp.h>
30	#include <openssl/rsa.h>	41	#include <openssl/rsa.h>
31	#include <openssl/err.h>	42	#include <openssl/err.h>
32		43
33	#include "gettext.h"	44	// openssl 0.9.8 compatibility
		45	#if OPENSSL_VERSION_NUMBER < 0x10100000
		46	#define require101(exp) exp
		47	#else
		48	#define require101(exp) equire (exp)
		49	#endif
34		50
35	#include "conf.h"	51	#include "conf.h"
36	#include "slog.h"	52	#include "slog.h"
37	#include "device.h"	53	#include "device.h"
38	#include "vpn.h"	54	#include "vpn.h"
39	#include "connection.h"	55	#include "connection.h"
		56	#include "hkdf.h"
40		57
41	#include "netcompat.h"	58	#include "netcompat.h"
42		59
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	60	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
		61	#define MAGIC "HUHN\xbd\xc6\xdb\x82" // 8 bytes of magic//D
48		62
49	#define ULTRA_FAST 1	63	#define ULTRA_FAST 1
50	#define HLOG 15	64	#define HLOG 15
51	#include "lzf/lzf.h"	65	#include "lzf/lzf.h"
52	#include "lzf/lzf_c.c"	66	#include "lzf/lzf_c.c"
53	#include "lzf/lzf_d.c"	67	#include "lzf/lzf_d.c"
54		68
		69	//////////////////////////////////////////////////////////////////////////////
		70
		71	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		72	static ev::child rs_child_ev;
		73
		74	namespace
		75	{
		76	void // c++ requires external linkage here, apparently :(
		77	rs_child_cb (ev::child &w, int revents)
		78	{
		79	w.stop ();
		80
		81	if (rs_queue.empty ())
		82	return;
		83
		84	pid_t pid = run_script (*rs_queue.front ().first, false);
		85	if (pid)
		86	{
		87	w.set (pid);
		88	w.start ();
		89	}
		90	else
		91	slog (L_WARN, rs_queue.front ().second);
		92
		93	delete rs_queue.front ().first;
		94	rs_queue.pop ();
		95	}
		96	};
		97
		98	// despite the fancy name, this is quite a hack
		99	static void
		100	run_script_queued (run_script_cb cb, const char warnmsg)
		101	{
		102	rs_queue.push (std::make_pair (cb, warnmsg));
		103
		104	if (!rs_child_ev.is_active ())
		105	{
		106	rs_child_ev.set<rs_child_cb> ();
		107	rs_child_ev ();
		108	}
		109	}
		110
		111	//////////////////////////////////////////////////////////////////////////////
		112
55	struct crypto_ctx	113	struct crypto_ctx
56	{	114	{
57	EVP_CIPHER_CTX cctx;	115	EVP_CIPHER_CTX cctx;
58	HMAC_CTX hctx;	116	HMAC_CTX hctx;
59		117
60	crypto_ctx (const rsachallenge &challenge, int enc);	118	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
61	~crypto_ctx ();	119	~crypto_ctx ();
62	};	120	};
63		121
64	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	122	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
65	{	123	{
		124	ecdh_key s;
		125
		126	curve25519_combine (a, b, s);
		127
		128	{
		129	u8 mac_key[MAC_KEYSIZE];
		130	static const unsigned char mac_info[] = "gvpe mac key";
		131
		132	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		133	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		134	kdf.extract (s, sizeof (s));
		135	kdf.extract_done (HKDF_PRF_HASH ());
		136	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		137
		138	HMAC_CTX_init (&hctx);
		139	require101 (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		140	}
		141
		142	{
		143	u8 cipher_key[CIPHER_KEYSIZE];
		144	static const unsigned char cipher_info[] = "gvpe cipher key";
		145
		146	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		147	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		148	kdf.extract (s, sizeof (s));
		149	kdf.extract_done (HKDF_PRF_HASH ());
		150	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		151
66	EVP_CIPHER_CTX_init (&cctx);	152	EVP_CIPHER_CTX_init (&cctx);
67	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	153	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
68	HMAC_CTX_init (&hctx);	154	}
69	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
70	}	155	}
71		156
72	crypto_ctx::~crypto_ctx ()	157	crypto_ctx::~crypto_ctx ()
73	{	158	{
74	require (EVP_CIPHER_CTX_cleanup (&cctx));	159	require (EVP_CIPHER_CTX_cleanup (&cctx));
75	HMAC_CTX_cleanup (&hctx);	160	HMAC_CTX_cleanup (&hctx);
76	}	161	}
77		162
		163	static inline void
		164	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		165	{
		166	if (RSA_public_encrypt (sizeof (auth.rsa),
		167	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		168	key, RSA_PKCS1_OAEP_PADDING) < 0)
		169	fatal ("RSA_public_encrypt error");
		170
		171	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		172	}
		173
		174	static inline bool
		175	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		176	{
		177	u8 rsa_decrypt[RSA_KEYLEN];
		178
		179	if (RSA_private_decrypt (sizeof (encr.rsa),
		180	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		181	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		182	return 0;
		183
		184	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		185	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		186
		187	return 1;
		188	}
		189
78	static void	190	static void
79	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	191	auth_hash (const auth_data &auth, const ecdh_key &b, auth_mac &mac)
80	{	192	{
81	EVP_MD_CTX ctx;	193	hkdf kdf (b, sizeof b, AUTH_DIGEST ()); // use response ecdh b as salt
82		194	kdf.extract (&auth.rsa, sizeof (auth.rsa));
83	EVP_MD_CTX_init (&ctx);	195	kdf.extract_done ();
84	require (EVP_DigestInit (&ctx, RSA_HASH));	196	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	}	197	}
90		198
91	struct rsa_entry {	199	void
92	tstamp expire;	200	connection::generate_auth_data ()
93	rsaid id;
94	rsachallenge chg;
95	};
96
97	struct rsa_cache : list<rsa_entry>
98	{	201	{
99	void cleaner_cb (time_watcher &w); time_watcher cleaner;	202	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	{ }	203	{
		204	// request data
		205	rand_fill (snd_auth.rsa);
		206	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
140		207
141	} rsa_cache;	208	// eventual response data
142		209	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
143	void rsa_cache::cleaner_cb (time_watcher &w)
144	{
145	if (!empty ())
146	{	210	}
147	w.start (NOW + RSA_TTL);
148		211
149	for (iterator i = begin (); i != end (); )	212	// every use prolongs the expiry
150	if (i->expire <= NOW)	213	auth_expire = ev_now () + AUTH_TTL;
151	i = erase (i);
152	else
153	++i;
154	}
155	}	214	}
156		215
157	//////////////////////////////////////////////////////////////////////////////	216	//////////////////////////////////////////////////////////////////////////////
158		217
159	void pkt_queue::put (net_packet *p)	218	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		219	: max_ttl (max_ttl), max_queue (max_queue)
160	{	220	{
161	if (queue[i])	221	queue = new pkt [max_queue];
162	{
163	delete queue[i];
164	j = (j + 1) % QUEUEDEPTH;
165	}
166		222
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;	223	i = 0;
189	j = 0;	224	j = 0;
		225
		226	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
190	}	227	}
191		228
192	pkt_queue::~pkt_queue ()	229	pkt_queue::~pkt_queue ()
193	{	230	{
194	for (i = QUEUEDEPTH; --i > 0; )	231	while (net_packet *p = get ())
		232	delete p;
		233
195	delete queue[i];	234	delete [] queue;
196	}	235	}
197		236
		237	void
		238	pkt_queue::expire_cb (ev::timer &w, int revents)
		239	{
		240	ev_tstamp expire = ev_now () - max_ttl;
		241
		242	for (;;)
		243	{
		244	if (empty ())
		245	break;
		246
		247	double diff = queue[j].tstamp - expire;
		248
		249	if (diff >= 0.)
		250	{
		251	w.start (diff > 0.5 ? diff : 0.5);
		252	break;
		253	}
		254
		255	delete get ();
		256	}
		257	}
		258
		259	void
		260	pkt_queue::put (net_packet *p)
		261	{
		262	ev_tstamp now = ev_now ();
		263
		264	// start expiry timer
		265	if (empty ())
		266	expire.start (max_ttl);
		267
		268	int ni = i + 1 == max_queue ? 0 : i + 1;
		269
		270	if (ni == j)
		271	delete get ();
		272
		273	queue[i].pkt = p;
		274	queue[i].tstamp = now;
		275
		276	i = ni;
		277	}
		278
		279	net_packet *
		280	pkt_queue::get ()
		281	{
		282	if (empty ())
		283	return 0;
		284
		285	net_packet *p = queue[j].pkt;
		286	queue[j].pkt = 0;
		287
		288	j = j + 1 == max_queue ? 0 : j + 1;
		289
		290	return p;
		291	}
		292
198	struct net_rateinfo {	293	struct net_rateinfo
		294	{
199	u32 host;	295	u32 host;
200	double pcnt, diff;	296	double pcnt, diff;
201	tstamp last;	297	tstamp last;
202	};	298	};
203		299
213		309
214	bool can (const sockinfo &si) { return can((u32)si.host); }	310	bool can (const sockinfo &si) { return can((u32)si.host); }
215	bool can (u32 host);	311	bool can (u32 host);
216	};	312	};
217		313
218	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	314	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
219		315
		316	bool
220	bool net_rate_limiter::can (u32 host)	317	net_rate_limiter::can (u32 host)
221	{	318	{
222	iterator i;	319	iterator i;
223		320
224	for (i = begin (); i != end (); )	321	for (i = begin (); i != end (); )
225	if (i->host == host)	322	if (i->host == host)
226	break;	323	break;
227	else if (i->last < NOW - NRL_EXPIRE)	324	else if (i->last < ev_now () - NRL_EXPIRE)
228	i = erase (i);	325	i = erase (i);
229	else	326	else
230	i++;	327	i++;
231		328
232	if (i == end ())	329	if (i == end ())
…		…
234	net_rateinfo ri;	331	net_rateinfo ri;
235		332
236	ri.host = host;	333	ri.host = host;
237	ri.pcnt = 1.;	334	ri.pcnt = 1.;
238	ri.diff = NRL_MAXDIF;	335	ri.diff = NRL_MAXDIF;
239	ri.last = NOW;	336	ri.last = ev_now ();
240		337
241	push_front (ri);	338	push_front (ri);
242		339
243	return true;	340	return true;
244	}	341	}
…		…
246	{	343	{
247	net_rateinfo ri (*i);	344	net_rateinfo ri (*i);
248	erase (i);	345	erase (i);
249		346
250	ri.pcnt = ri.pcnt * NRL_ALPHA;	347	ri.pcnt = ri.pcnt * NRL_ALPHA;
251	ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);	348	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
252		349
253	ri.last = NOW;	350	ri.last = ev_now ();
254		351
255	double dif = ri.diff / ri.pcnt;	352	double dif = ri.diff / ri.pcnt;
256		353
257	bool send = dif > NRL_CUTOFF;	354	bool send = dif > NRL_CUTOFF;
258		355
…		…
270	}	367	}
271	}	368	}
272		369
273	/////////////////////////////////////////////////////////////////////////////	370	/////////////////////////////////////////////////////////////////////////////
274		371
275	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	372	void
276
277	void hmac_packet::hmac_gen (crypto_ctx *ctx)	373	hmac_packet::hmac_gen (crypto_ctx ctx, u8 hmac_digest)
278	{	374	{
279	unsigned int xlen;
280
281	HMAC_CTX *hctx = &ctx->hctx;	375	HMAC_CTX *hctx = &ctx->hctx;
282		376
283	HMAC_Init_ex (hctx, 0, 0, 0, 0);	377	require101 (HMAC_Init_ex (hctx, 0, 0, 0, 0));
284	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	378	require101 (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), len - sizeof (hmac_packet)));
285	len - sizeof (hmac_packet));	379	require101 (HMAC_Final (hctx, hmac_digest, 0));
286	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);
287	}	380	}
288		381
289	void	382	void
290	hmac_packet::hmac_set (crypto_ctx *ctx)	383	hmac_packet::hmac_set (crypto_ctx *ctx)
291	{	384	{
292	hmac_gen (ctx);	385	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
293		386	hmac_gen (ctx, hmac_digest);
294	memcpy (hmac, hmac_digest, HMACLENGTH);	387	memcpy (hmac, hmac_digest, HMACLENGTH);
295	}	388	}
296		389
297	bool	390	bool
298	hmac_packet::hmac_chk (crypto_ctx *ctx)	391	hmac_packet::hmac_chk (crypto_ctx *ctx)
299	{	392	{
300	hmac_gen (ctx);	393	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
301		394	hmac_gen (ctx, hmac_digest);
302	return !memcmp (hmac, hmac_digest, HMACLENGTH);	395	return !memcmp (hmac, hmac_digest, HMACLENGTH);
303	}	396	}
304		397
		398	void
305	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	399	vpn_packet::set_hdr (ptype type_, unsigned int dst)
306	{	400	{
307	type = type_;	401	type = type_;
308		402
309	int src = THISNODE->id;	403	int src = THISNODE->id;
310		404
…		…
315		409
316	#define MAXVPNDATA (MAX_MTU - 6 - 6)	410	#define MAXVPNDATA (MAX_MTU - 6 - 6)
317	#define DATAHDR (sizeof (u32) + RAND_SIZE)	411	#define DATAHDR (sizeof (u32) + RAND_SIZE)
318		412
319	struct vpndata_packet : vpn_packet	413	struct vpndata_packet : vpn_packet
		414	{
		415	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		416
		417	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		418	tap_packet unpack (connection conn, u32 &seqno);
		419
		420	private:
		421	const u32 data_hdr_size () const
320	{	422	{
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;	423	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
330	}
331	};	424	}
		425	};
332		426
333	void	427	void
334	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	428	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
335	{	429	{
336	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	430	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
338	ptype type = PT_DATA_UNCOMPRESSED;	432	ptype type = PT_DATA_UNCOMPRESSED;
339		433
340	#if ENABLE_COMPRESSION	434	#if ENABLE_COMPRESSION
341	u8 cdata[MAX_MTU];	435	u8 cdata[MAX_MTU];
342		436
343	if (conn->features & ENABLE_COMPRESSION)	437	if (conn->features & FEATURE_COMPRESSION)
344	{	438	{
345	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	439	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
346		440
347	if (cl)	441	if (cl)
348	{	442	{
…		…
354	d[1] = cl;	448	d[1] = cl;
355	}	449	}
356	}	450	}
357	#endif	451	#endif
358		452
359	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	453	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
360		454
361	struct {	455	struct {
362	#if RAND_SIZE	456	#if RAND_SIZE
363	u8 rnd[RAND_SIZE];	457	u8 rnd[RAND_SIZE];
364	#endif	458	#endif
365	u32 seqno;	459	u32 seqno;
366	} datahdr;	460	} datahdr;
367		461
368	datahdr.seqno = ntohl (seqno);	462	datahdr.seqno = ntohl (seqno);
369	#if RAND_SIZE	463	#if RAND_SIZE
370	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	464	// NB: a constant (per session) random prefix
		465	// is likely enough, but we don't take any chances.
		466	conn->oiv.get (datahdr.rnd, RAND_SIZE);
371	#endif	467	#endif
372		468
373	require (EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
374	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
375	(unsigned char *) &datahdr, DATAHDR));	471	(unsigned char *) &datahdr, DATAHDR));
…		…
397	int outl = 0, outl2;	493	int outl = 0, outl2;
398	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
399	u8 *d;	495	u8 *d;
400	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
401		497
402	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
403		499
404	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
405	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
406		502
407	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
408	d = cdata;	504	d = cdata;
409	else	505	else
410	#endif	506	#endif
411	d = &(*p)[6 + 6 - DATAHDR];	507	d = &(*p)[6 + 6] - DATAHDR;
412		508
413	/* this overwrites part of the src mac, but we fix that later */	509	// we play do evil games with the struct layout atm.
		510	// pending better solutions, we at least do some verification.
		511	// this is fine, as we left ISO territory long ago.
		512	require (DATAHDR <= 16);
		513	require ((u8 )(&p->len + 1) == &(p)[0]);
		514
		515	// this can overwrite the len/dst/src fields
414	require (EVP_DecryptUpdate (cctx,	516	require (EVP_DecryptUpdate (cctx,
415	d, &outl2,	517	d, &outl2,
416	(unsigned char *)&data, len - data_hdr_size ()));	518	(unsigned char *)&data, len - data_hdr_size ()));
417	outl += outl2;	519	outl += outl2;
418		520
…		…
449	}	551	}
450	};	552	};
451		553
452	struct config_packet : vpn_packet	554	struct config_packet : vpn_packet
453	{	555	{
454	// actually, hmaclen cannot be checked because the hmac	556	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;	557	u8 prot_major, prot_minor, randsize;
458	u8 flags, challengelen, features, pad3;	558	u8 flags, features, pad6, pad7, pad8;
459	u32 cipher_nid, digest_nid, hmac_nid;	559	u32 cipher_nid, mac_nid, auth_nid;
460		560
461	void setup (ptype type, int dst);	561	void setup (ptype type, int dst);
462	bool chk_config () const;	562	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
463		563
464	static u8 get_features ()	564	static u8 get_features ()
465	{	565	{
466	u8 f = 0;	566	u8 f = 0;
467	#if ENABLE_COMPRESSION	567	#if ENABLE_COMPRESSION
468	f \|= FEATURE_COMPRESSION;	568	f \|= FEATURE_COMPRESSION;
469	#endif	569	#endif
470	#if ENABLE_ROHC	570	#if ENABLE_ROHC
471	f \|= FEATURE_ROHC;	571	f \|= FEATURE_ROHC;
472	#endif	572	#endif
		573	#if ENABLE_BRIDGING
		574	f \|= FEATURE_BRIDGING;
		575	#endif
473	return f;	576	return f;
474	}	577	}
475	};	578	};
476		579
		580	void
477	void config_packet::setup (ptype type, int dst)	581	config_packet::setup (ptype type, int dst)
478	{	582	{
479	prot_major = PROTOCOL_MAJOR;	583	prot_major = PROTOCOL_MAJOR;
480	prot_minor = PROTOCOL_MINOR;	584	prot_minor = PROTOCOL_MINOR;
481	randsize = RAND_SIZE;	585	randsize = RAND_SIZE;
482	hmaclen = HMACLENGTH;	586	flags = 0;
483	flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
484	challengelen = sizeof (rsachallenge);
485	features = get_features ();	587	features = get_features ();
486		588
		589	strncpy ((char *)serial, conf.serial, sizeof (serial));
		590
487	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	591	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
488	digest_nid = htonl (EVP_MD_type (RSA_HASH));
489	hmac_nid = htonl (EVP_MD_type (DIGEST));	592	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		593	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
490		594
491	len = sizeof (*this) - sizeof (net_packet);	595	len = sizeof (*this) - sizeof (net_packet);
492	set_hdr (type, dst);	596	set_hdr (type, dst);
493	}	597	}
494		598
495	bool config_packet::chk_config () const	599	bool
		600	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
496	{	601	{
497	if (prot_major != PROTOCOL_MAJOR)	602	if (prot_major != PROTOCOL_MAJOR)
498	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	603	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		604	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
499	else if (randsize != RAND_SIZE)	605	else if (randsize != RAND_SIZE)
500	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	606	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
501	else if (hmaclen != HMACLENGTH)	607	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)))	608	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));	609	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
511	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	610	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)))	611	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));	612	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		613	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		614	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		615	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		616	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
515	else	617	else
		618	{
		619	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		620
		621	if (cmp > 0)
		622	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		623	conf->nodename, (const char *)rsi);
		624	else if (cmp == 0)
516	return true;	625	return true;
		626	}
517		627
518	return false;	628	return false;
519	}	629	}
520		630
521	struct auth_req_packet : config_packet	631	struct auth_req_packet : config_packet // UNPROTECTED
522	{	632	{
523	char magic[8];	633	char magic[8];
524	u8 initiate; // false if this is just an automatic reply	634	u8 initiate; // false if this is just an automatic reply
525	u8 protocols; // supported protocols (will be patched on forward)	635	u8 protocols; // supported protocols (will be patched on forward)
526	u8 pad2, pad3;	636	u8 pad2, pad3;
527	rsaid id;	637	auth_encr encr;
528	rsaencrdata encr;
529		638
530	auth_req_packet (int dst, bool initiate_, u8 protocols_)	639	auth_req_packet (int dst, bool initiate_, u8 protocols_)
531	{	640	{
532	config_packet::setup (PT_AUTH_REQ, dst);	641	config_packet::setup (PT_AUTH_REQ, dst);
533	strncpy (magic, MAGIC, 8);	642	memcpy (magic, MAGIC, 8);
534	initiate = !!initiate_;	643	initiate = !!initiate_;
535	protocols = protocols_;	644	protocols = protocols_;
536		645
537	len = sizeof (*this) - sizeof (net_packet);	646	len = sizeof (*this) - sizeof (net_packet);
538	}	647	}
539	};	648	};
540		649
541	struct auth_res_packet : config_packet	650	struct auth_res_packet : vpn_packet // UNPROTECTED
542	{	651	{
543	rsaid id;
544	u8 pad1, pad2, pad3;
545	u8 response_len; // encrypted length
546	rsaresponse response;	652	auth_response response;
547		653
548	auth_res_packet (int dst)	654	auth_res_packet (int dst)
549	{	655	{
550	config_packet::setup (PT_AUTH_RES, dst);	656	set_hdr (PT_AUTH_RES, dst);
551		657
552	len = sizeof (*this) - sizeof (net_packet);	658	len = sizeof (*this) - sizeof (net_packet);
553	}	659	}
554	};	660	};
555		661
…		…
585	};	691	};
586		692
587	/////////////////////////////////////////////////////////////////////////////	693	/////////////////////////////////////////////////////////////////////////////
588		694
589	void	695	void
590	connection::connection_established ()	696	connection::connection_established (const sockinfo &rsi)
591	{	697	{
		698	if (!have_snd_auth \|\| !have_rcv_auth)
		699	return;
		700
		701	si = rsi;
		702	protocol = rsi.prot;
		703
		704	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		705	conf->nodename, (const char *)rsi,
		706	is_direct ? "direct" : "forwarded",
		707	PROTOCOL_MAJOR, prot_minor);
		708
		709	if (::conf.script_node_up)
		710	{
		711	run_script_cb *cb = new run_script_cb;
		712	cb->set<connection, &connection::script_node_up> (this);
		713	run_script_queued (cb, _("node-up command execution failed, continuing."));
		714	}
		715
		716	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		717	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		718
		719	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		720	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		721
		722	oiv.reset ();
		723
		724	// make sure rekeying timeouts are slightly asymmetric
		725	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		726	rekey.start (rekey_interval, rekey_interval);
		727
		728	keepalive.start (::conf.keepalive);
		729
		730	// send queued packets
592	if (ictx && octx)	731	if (ictx && octx)
593	{	732	{
594	connectmode = conf->connectmode;	733	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	{	734	{
604	while (tap_packet p = (tap_packet )data_queue.get ())
605	{
606	send_data_packet (p);	735	if (p->len) send_data_packet (p);
607	delete p;	736	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	}	737	}
		738
		739	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		740	{
		741	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
		742	delete p;
		743	}
616	}	744	}
		745
		746	vpn->connection_established (this);
		747	}
		748
		749	void
		750	connection::reset_si ()
		751	{
		752	if (vpn->can_direct (THISNODE, conf))
		753	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
617	else	754	else
618	{	755	{
619	retry_cnt = 0;	756	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
620	establish_connection.start (NOW + 5);	757	protocol = 0;
621	keepalive.stop ();
622	rekey.stop ();
623	}	758	}
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		759
636	si.set (conf, protocol);	760	si.set (conf, protocol);
		761
		762	is_direct = si.valid ();
637	}	763	}
638		764
639	// ensure sockinfo is valid, forward if necessary	765	// ensure sockinfo is valid, forward if necessary
640	const sockinfo &	766	const sockinfo &
641	connection::forward_si (const sockinfo &si) const	767	connection::forward_si (const sockinfo &si) const
642	{	768	{
643	if (!si.valid ())	769	if (!si.valid ())
644	{	770	{
645	connection *r = vpn->find_router ();	771	connection *r = vpn->find_router_for (this);
646		772
647	if (r)	773	if (r)
648	{	774	{
649	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	775	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
650	conf->nodename, r->conf->nodename);	776	conf->nodename, r->conf->nodename);
651	return r->si;	777	return r->si;
652	}	778	}
653	else	779	else
654	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	780	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
655	conf->nodename);	781	conf->nodename);
656	}	782	}
657		783
658	return si;	784	return si;
659	}	785	}
660		786
661	void	787	void
662	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	788	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
663	{	789	{
664	bool ok;	790	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 ();	791	reset_connection ();
692	}	792	}
693		793
694	void	794	void
695	connection::send_ping (const sockinfo &si, u8 pong)	795	connection::send_ping (const sockinfo &si, u8 pong)
696	{	796	{
697	ping_packet *pkt = new ping_packet;	797	ping_packet *pkt = new ping_packet;
698		798
699	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	799	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		800
		801	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
700	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	802	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
701		803
702	delete pkt;	804	delete pkt;
703	}	805	}
704		806
…		…
719	void	821	void
720	connection::send_auth_request (const sockinfo &si, bool initiate)	822	connection::send_auth_request (const sockinfo &si, bool initiate)
721	{	823	{
722	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	824	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
723		825
724	rsachallenge chg;	826	generate_auth_data ();
725	rsa_cache.gen (pkt->id, chg);
726	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	827	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
727		828
728	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	829	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	830	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
731		831
732	delete pkt;	832	delete pkt;
733	}	833	}
734		834
735	void	835	void
736	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	836	connection::send_auth_response (const sockinfo &si)
737	{	837	{
738	auth_res_packet *pkt = new auth_res_packet (conf->id);	838	auth_res_packet *pkt = new auth_res_packet (conf->id);
739		839
740	pkt->id = id;	840	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof rcv_ecdh_b);
		841	auth_hash (rcv_auth, rcv_ecdh_b, pkt->response.mac);
741		842
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);	843	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	844	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
749		845
750	delete pkt;	846	delete pkt;
751	}	847	}
752		848
753	void	849	void
754	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	850	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
755	{	851	{
756	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	852	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
757	conf->id, rid, (const char *)rsi);	853	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		854	conf->protocols);
758		855
759	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	856	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
760		857
761	r->hmac_set (octx);	858	r->hmac_set (octx);
762	send_vpn_packet (r, si);	859	send_vpn_packet (r, si);
763		860
764	delete r;	861	delete r;
765	}	862	}
766		863
767	void	864	inline void
768	connection::establish_connection_cb (time_watcher &w)	865	connection::establish_connection_cb (ev::timer &w, int revents)
769	{	866	{
770	if (!ictx	867	if (!(ictx && octx)
771	&& conf != THISNODE	868	&& conf != THISNODE
772	&& connectmode != conf_node::C_NEVER	869	&& connectmode != conf_node::C_NEVER
773	&& connectmode != conf_node::C_DISABLED	870	&& connectmode != conf_node::C_DISABLED
774	&& NOW > w.at)	871	&& !w.is_active ())
775	{	872	{
776	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	873	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
777		874	// and stop trying. should probably be handled by a per-connection expire handler.
778	if (retry_int < conf->max_retry)	875	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		876	{
		877	reset_connection ();
779	retry_cnt++;	878	return;
780	else	879	}
781	retry_int = conf->max_retry;
782		880
783	w.start (NOW + retry_int);	881	last_establish_attempt = ev_now ();
		882
		883	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		884	? (retry_cnt & 3) + 1
		885	: 1 << (retry_cnt >> 2));
784		886
785	reset_si ();	887	reset_si ();
786		888
787	if (si.prot && !si.host)	889	bool slow = si.prot & PROT_SLOW;
		890
		891	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		892	{
		893	/TODO/ /* start the timer so we don't recurse endlessly */
		894	w.start (1);
788	vpn->send_connect_request (conf->id);	895	vpn->send_connect_request (this);
		896	}
789	else	897	else
790	{	898	{
		899	if (si.valid ())
		900	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		901	conf->nodename, (const char *)si);
		902
791	const sockinfo &dsi = forward_si (si);	903	const sockinfo &dsi = forward_si (si);
		904
		905	slow = slow \|\| (dsi.prot & PROT_SLOW);
792		906
793	if (dsi.valid () && auth_rate_limiter.can (dsi))	907	if (dsi.valid () && auth_rate_limiter.can (dsi))
794	{	908	{
795	if (retry_cnt < 4)	909	if (retry_cnt < 4)
796	send_auth_request (dsi, true);	910	send_auth_request (dsi, true);
797	else	911	else
798	send_ping (dsi, 0);	912	send_ping (dsi, 0);
799	}	913	}
800	}	914	}
		915
		916	retry_int *= slow ? 8. : 0.9;
		917
		918	if (retry_int < conf->max_retry)
		919	retry_cnt++;
		920	else
		921	retry_int = conf->max_retry;
		922
		923	w.start (retry_int);
801	}	924	}
802	}	925	}
803		926
804	void	927	void
805	connection::reset_connection ()	928	connection::reset_connection ()
…		…
808	{	931	{
809	slog (L_INFO, _("%s(%s): connection lost"),	932	slog (L_INFO, _("%s(%s): connection lost"),
810	conf->nodename, (const char *)si);	933	conf->nodename, (const char *)si);
811		934
812	if (::conf.script_node_down)	935	if (::conf.script_node_down)
813	run_script (run_script_cb (this, &connection::script_node_down), false);	936	{
		937	run_script_cb *cb = new run_script_cb;
		938	cb->set<connection, &connection::script_node_down> (this);
		939	run_script_queued (cb, _("node-down command execution failed, continuing."));
		940	}
814	}	941	}
815		942
816	delete ictx; ictx = 0;	943	delete ictx; ictx = 0;
817	delete octx; octx = 0;	944	delete octx; octx = 0;
818		945
819	si.host = 0;	946	si.host = 0;
820		947
		948	have_snd_auth = false;
		949	have_rcv_auth = false;
		950	auth_expire = 0.;
		951
821	last_activity = 0;	952	last_activity = 0.;
		953	//last_si_change = 0.;
822	retry_cnt = 0;	954	retry_cnt = 0;
823		955
824	rekey.stop ();	956	rekey.stop ();
825	keepalive.stop ();	957	keepalive.stop ();
826	establish_connection.stop ();	958	establish_connection.stop ();
…		…
833	send_reset (si);	965	send_reset (si);
834		966
835	reset_connection ();	967	reset_connection ();
836	}	968	}
837		969
838	void	970	// poor-man's rekeying
839	connection::rekey_cb (time_watcher &w)	971	inline void
		972	connection::rekey_cb (ev::timer &w, int revents)
840	{	973	{
841	reset_connection ();	974	reset_connection ();
842	establish_connection ();	975	establish_connection ();
843	}	976	}
844		977
…		…
860	if (oseqno > MAX_SEQNO)	993	if (oseqno > MAX_SEQNO)
861	rekey ();	994	rekey ();
862	}	995	}
863		996
864	void	997	void
		998	connection::post_inject_queue ()
		999	{
		1000	// force a connection every now and when when packets are sent (max 1/s)
		1001	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		1002	establish_connection.stop ();
		1003
		1004	establish_connection ();
		1005	}
		1006
		1007	void
865	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1008	connection::inject_data_packet (tap_packet *pkt)
866	{	1009	{
867	if (ictx && octx)	1010	if (ictx && octx)
868	send_data_packet (pkt);	1011	send_data_packet (pkt);
869	else	1012	else
870	{	1013	{
871	if (!broadcast)//DDDD
872	data_queue.put (new tap_packet (*pkt));	1014	data_queue.put (new tap_packet (*pkt));
873		1015	post_inject_queue ();
874	establish_connection ();
875	}	1016	}
876	}	1017	}
877		1018
		1019	void
878	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1020	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
879	{	1021	{
880	if (ictx && octx)	1022	if (ictx && octx)
881	send_vpn_packet (pkt, si, tos);	1023	send_vpn_packet (pkt, si, tos);
882	else	1024	else
883	{	1025	{
884	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1026	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
885		1027	post_inject_queue ();
886	establish_connection ();
887	}	1028	}
888	}	1029	}
889		1030
890	void	1031	void
891	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1032	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
892	{	1033	{
893	last_activity = NOW;	1034	last_activity = ev_now ();
894		1035
895	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1036	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
896	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1037	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1038
		1039	if (connectmode == conf_node::C_DISABLED)
		1040	return;
897		1041
898	switch (pkt->typ ())	1042	switch (pkt->typ ())
899	{	1043	{
900	case vpn_packet::PT_PING:	1044	case vpn_packet::PT_PING:
		1045	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1046
901	// we send pings instead of auth packets after some retries,	1047	// we send pings instead of auth packets after some retries,
902	// so reset the retry counter and establish a connection	1048	// so reset the retry counter and establish a connection
903	// when we receive a ping.	1049	// when we receive a ping.
904	if (!ictx)	1050	if (!ictx)
905	{	1051	{
906	if (auth_rate_limiter.can (rsi))	1052	if (auth_rate_limiter.can (rsi))
907	send_auth_request (rsi, true);	1053	send_auth_request (rsi, true);
908	}	1054	}
909	else	1055	else
		1056	// we would love to change the socket address here, but ping's aren't
		1057	// authenticated, so we best ignore it.
910	send_ping (rsi, 1); // pong	1058	send_ping (rsi, 1); // pong
911		1059
912	break;	1060	break;
913		1061
914	case vpn_packet::PT_PONG:	1062	case vpn_packet::PT_PONG:
		1063	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1064
		1065	// a PONG might mean that the other side doesn't really know
		1066	// about our desire for communication.
		1067	establish_connection ();
915	break;	1068	break;
916		1069
917	case vpn_packet::PT_RESET:	1070	case vpn_packet::PT_RESET:
918	{	1071	{
919	reset_connection ();	1072	reset_connection ();
920		1073
921	config_packet p = (config_packet ) pkt;	1074	config_packet p = (config_packet ) pkt;
922		1075
923	if (!p->chk_config ())	1076	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 ();	1077	establish_connection ();
931	}	1078	}
932	break;	1079	break;
933		1080
934	case vpn_packet::PT_AUTH_REQ:	1081	case vpn_packet::PT_AUTH_REQ:
935	if (auth_rate_limiter.can (rsi))	1082	if (auth_rate_limiter.can (rsi))
936	{	1083	{
937	auth_req_packet p = (auth_req_packet ) pkt;	1084	auth_req_packet p = (auth_req_packet )pkt;
938		1085
939	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1086	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1087	conf->nodename, p->initiate ? "initiate" : "reply",
		1088	p->protocols, p->features);
940		1089
941	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1090	if (memcmp (p->magic, MAGIC, 8))
		1091	{
		1092	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1093	conf->nodename, (const char *)rsi);
		1094	}
		1095	else if (p->chk_config (conf, rsi))
942	{	1096	{
943	if (p->prot_minor != PROTOCOL_MINOR)	1097	if (p->prot_minor != PROTOCOL_MINOR)
944	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1098	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
945	conf->nodename, (const char *)rsi,	1099	conf->nodename, (const char *)rsi,
946	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1100	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
947		1101
948	if (p->initiate)	1102	if (p->initiate)
949	send_auth_request (rsi, false);	1103	send_auth_request (rsi, false);
950		1104
951	rsachallenge k;	1105	auth_data auth;
952		1106
953	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1107	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
954	{	1108	{
955	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1109	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));	1110	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
957	break;
958	}	1111	}
959	else	1112	else
960	{	1113	{
961	delete octx;	1114	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
962		1115
963	octx = new crypto_ctx (k, 1);	1116	rcv_auth = auth;
964	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1117	have_rcv_auth = true;
965		1118
966	// compatibility code, remove when no longer required	1119	send_auth_response (rsi);
967	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
968		1120
		1121	if (chg)
		1122	{
969	conf->protocols = p->protocols;	1123	conf->protocols = p->protocols;
970	features = p->features & config_packet::get_features ();	1124	features = p->features & config_packet::get_features ();
971		1125
972	send_auth_response (rsi, p->id, k);
973
974	connection_established ();	1126	connection_established (rsi);
975
976	break;	1127	}
977	}	1128	}
		1129
		1130	break;
978	}	1131	}
979	else
980	slog (L_WARN, _("%s(%s): protocol mismatch"),
981	conf->nodename, (const char *)rsi);
982		1132
983	send_reset (rsi);	1133	send_reset (rsi);
984	}	1134	}
985		1135
986	break;	1136	break;
987		1137
988	case vpn_packet::PT_AUTH_RES:	1138	case vpn_packet::PT_AUTH_RES:
989	{	1139	{
990	auth_res_packet p = (auth_res_packet ) pkt;	1140	auth_res_packet p = (auth_res_packet )pkt;
991		1141
992	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1142	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
993		1143
994	if (p->chk_config ())	1144	auth_mac local_mac;
		1145	auth_hash (snd_auth, p->response.ecdh, local_mac);
		1146
		1147	if (memcmp (&p->response.mac, local_mac, sizeof local_mac))
995	{	1148	{
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"),	1149	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
1006	conf->nodename, (const char *)rsi);	1150	conf->nodename, (const char *)rsi);
1007	break;
1008	}	1151	}
1009	else	1152	else if (!have_snd_auth)
1010	{	1153	{
1011	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1154	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
1012		1155
1013	if (!p->hmac_chk (cctx))	1156	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 ();	1157	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	}	1158	}
1056	}	1159	}
1057
1058	send_reset (rsi);
1059	break;	1160	break;
1060		1161
1061	case vpn_packet::PT_DATA_COMPRESSED:	1162	case vpn_packet::PT_DATA_COMPRESSED:
1062	#if !ENABLE_COMPRESSION	1163	#if !ENABLE_COMPRESSION
1063	send_reset (rsi);	1164	send_reset (rsi);
…		…
1070	{	1171	{
1071	vpndata_packet p = (vpndata_packet )pkt;	1172	vpndata_packet p = (vpndata_packet )pkt;
1072		1173
1073	if (!p->hmac_chk (ictx))	1174	if (!p->hmac_chk (ictx))
1074	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1175	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1075	"could be an attack, or just corruption or a synchronization error"),	1176	"could be an attack, or just corruption or a synchronization error."),
1076	conf->nodename, (const char *)rsi);	1177	conf->nodename, (const char *)rsi);
1077	else	1178	else
1078	{	1179	{
1079	u32 seqno;	1180	u32 seqno;
1080	tap_packet *d = p->unpack (this, seqno);	1181	tap_packet *d = p->unpack (this, seqno);
		1182	int seqclass = iseqno.seqno_classify (seqno);
1081		1183
1082	if (iseqno.recv_ok (seqno))	1184	if (seqclass == 0) // ok
1083	{	1185	{
1084	vpn->tap->send (d);	1186	vpn->tap->send (d);
1085		1187
1086	if (si != rsi)	1188	if (si != rsi)
1087	{	1189	{
1088	// fast re-sync on connection changes, useful especially for tcp/ip	1190	// fast re-sync on source address changes, useful especially for tcp/ip
		1191	//if (last_si_change < ev_now () + 5.)
1089	si = rsi;	1192	// {
1090
1091	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1193	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1092	conf->nodename, (const char )si, (const char )rsi);	1194	conf->nodename, (const char )si, (const char )rsi);
		1195
		1196	si = rsi;
		1197
		1198	if (::conf.script_node_change)
		1199	{
		1200	run_script_cb *cb = new run_script_cb;
		1201	cb->set<connection, &connection::script_node_change> (this);
		1202	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1203	}
		1204
		1205	// }
		1206	//else
		1207	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1208	// conf->nodename, (const char )si, (const char )rsi);
1093	}	1209	}
		1210	}
		1211	else if (seqclass == 1) // far history
		1212	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1213	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1214	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1215	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1216	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1217	else if (seqclass == 3) // reset
		1218	{
		1219	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1220	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1221	send_reset (rsi);
1094	}	1222	}
1095		1223
1096	delete d;	1224	delete d;
1097	break;	1225	break;
1098	}	1226	}
…		…
1102	break;	1230	break;
1103		1231
1104	case vpn_packet::PT_CONNECT_REQ:	1232	case vpn_packet::PT_CONNECT_REQ:
1105	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1233	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1106	{	1234	{
1107	connect_req_packet p = (connect_req_packet ) pkt;	1235	connect_req_packet p = (connect_req_packet )pkt;
1108		1236
1109	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1237	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	{	1238	{
		1239	connection *c = vpn->conns[p->id - 1];
		1240	conf->protocols = p->protocols;
		1241
		1242	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1243	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1244	p->protocols,
		1245	c->ictx && c->octx);
		1246
		1247	if (c->ictx && c->octx)
		1248	{
1118	// send connect_info packets to both sides, in case one is	1249	// send connect_info packets to both sides, in case one is
1119	// behind a nat firewall (or both ;)	1250	// behind a nat firewall (or both ;)
1120	c->send_connect_info (conf->id, si, conf->protocols);	1251	c->send_connect_info (conf->id, si, conf->protocols);
1121	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1252	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1253	}
		1254	else
		1255	c->establish_connection ();
1122	}	1256	}
1123	else	1257	else
1124	c->establish_connection ();	1258	slog (L_WARN,
		1259	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1260	p->id);
1125	}	1261	}
1126		1262
1127	break;	1263	break;
1128		1264
1129	case vpn_packet::PT_CONNECT_INFO:	1265	case vpn_packet::PT_CONNECT_INFO:
1130	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1266	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1131	{	1267	{
1132	connect_info_packet p = (connect_info_packet )pkt;	1268	connect_info_packet p = (connect_info_packet )pkt;
1133		1269
1134	if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything	1270	if (p->id > 0 && p->id <= vpn->conns.size ())
1135	{	1271	{
1136	connection *c = vpn->conns[p->id - 1];	1272	connection *c = vpn->conns[p->id - 1];
1137		1273
1138	c->conf->protocols = p->protocols;	1274	c->conf->protocols = p->protocols;
1139	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1275	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1140	p->si.upgrade_protocol (protocol, c->conf);	1276	p->si.upgrade_protocol (protocol, c->conf);
1141		1277
1142	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1278	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);	1279	conf->nodename,
		1280	vpn->conns[p->id - 1]->conf->nodename,
		1281	(const char *)p->si,
		1282	p->protocols,
		1283	protocol,
		1284	p->si.supported_protocols (c->conf),
		1285	!c->ictx && !c->octx);
1144		1286
1145	const sockinfo &dsi = forward_si (p->si);	1287	const sockinfo &dsi = forward_si (p->si);
1146		1288
1147	if (dsi.valid ())	1289	if (dsi.valid ())
1148	c->send_auth_request (dsi, true);	1290	c->send_auth_request (dsi, true);
		1291	else
		1292	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1293	vpn->conns[p->id - 1]->conf->nodename,
		1294	(const char *)p->si);
1149	}	1295	}
		1296	else
		1297	slog (L_WARN,
		1298	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1299	p->id);
1150	}	1300	}
1151		1301
1152	break;	1302	break;
1153		1303
1154	default:	1304	default:
1155	send_reset (rsi);	1305	send_reset (rsi);
1156	break;	1306	break;
1157	}	1307	}
1158	}	1308	}
1159		1309
1160	void connection::keepalive_cb (time_watcher &w)	1310	inline void
		1311	connection::keepalive_cb (ev::timer &w, int revents)
1161	{	1312	{
1162	if (NOW >= last_activity + ::conf.keepalive + 30)	1313	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1314
		1315	if (when >= 0)
		1316	w.start (when);
		1317	else if (when < -15)
1163	{	1318	{
1164	reset_connection ();	1319	reset_connection ();
1165	establish_connection ();	1320	establish_connection ();
1166	}	1321	}
1167	else if (NOW < last_activity + ::conf.keepalive)
1168	w.start (last_activity + ::conf.keepalive);
1169	else if (conf->connectmode != conf_node::C_ONDEMAND	1322	else if (conf->connectmode != conf_node::C_ONDEMAND
1170	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1323	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1171	{	1324	{
		1325	w.start (3);
1172	send_ping (si);	1326	send_ping (si);
1173	w.start (NOW + 5);
1174	}	1327	}
1175	else if (NOW < last_activity + ::conf.keepalive + 10)	1328	else if (when >= -10)
1176	// hold ondemand connections implicitly a few seconds longer	1329	// hold ondemand connections implicitly a few seconds longer
1177	// should delete octx, though, or something like that ;)	1330	// should delete octx, though, or something like that ;)
1178	w.start (last_activity + ::conf.keepalive + 10);	1331	w.start (when + 10);
1179	else	1332	else
1180	reset_connection ();	1333	reset_connection ();
1181	}	1334	}
1182		1335
		1336	void
1183	void connection::send_connect_request (int id)	1337	connection::send_connect_request (int id)
1184	{	1338	{
1185	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1339	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1186		1340
1187	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1341	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1342	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1343	THISNODE->protocols);
1188	p->hmac_set (octx);	1344	p->hmac_set (octx);
1189	send_vpn_packet (p, si);	1345	send_vpn_packet (p, si);
1190		1346
1191	delete p;	1347	delete p;
1192	}	1348	}
1193		1349
1194	void connection::script_node ()	1350	void
		1351	connection::script_init_env (const char *ext)
1195	{	1352	{
1196	vpn->script_if_up ();
1197
1198	char *env;	1353	char *env;
		1354	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1355	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1356	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1357	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1358	conf->id & 0xff); putenv (env);
		1359	}
		1360
		1361	void
		1362	connection::script_init_connect_env ()
		1363	{
		1364	vpn->script_init_env ();
		1365
		1366	char *env;
1199	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1367	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1368	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1200	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1369	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1201	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1370	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1202	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1371	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1203	}	1372	}
1204		1373
		1374	inline const char *
1205	const char *connection::script_node_up ()	1375	connection::script_node_up ()
1206	{	1376	{
1207	script_node ();	1377	script_init_connect_env ();
1208		1378
1209	putenv ("STATE=up");	1379	putenv ((char *)"STATE=up");
1210		1380
		1381	char *filename;
		1382	asprintf (&filename,
		1383	"%s/%s",
		1384	confbase,
1211	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1385	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1212	}
1213		1386
		1387	return filename;
		1388	}
		1389
		1390	inline const char *
		1391	connection::script_node_change ()
		1392	{
		1393	script_init_connect_env ();
		1394
		1395	putenv ((char *)"STATE=change");
		1396
		1397	char *filename;
		1398	asprintf (&filename,
		1399	"%s/%s",
		1400	confbase,
		1401	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1402
		1403	return filename;
		1404	}
		1405
		1406	inline const char *
1214	const char *connection::script_node_down ()	1407	connection::script_node_down ()
1215	{	1408	{
1216	script_node ();	1409	script_init_connect_env ();
1217		1410
1218	putenv ("STATE=down");	1411	putenv ((char *)"STATE=down");
1219		1412
1220	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1413	char *filename;
		1414	asprintf (&filename,
		1415	"%s/%s",
		1416	confbase,
		1417	::conf.script_node_down ? ::conf.script_node_down : "node-down");
		1418
		1419	return filename;
1221	}	1420	}
1222		1421
1223	connection::connection (struct vpn vpn, conf_node conf)	1422	connection::connection (struct vpn vpn, conf_node conf)
1224	: vpn(vpn), conf(conf)	1423	: 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	1424	#if ENABLE_DNS
1229	, dnsv4_tw (this, &connection::dnsv4_cb)	1425	dns (0),
1230	, dns_rcvdq (0), dns_snddq (0)
1231	, dns_rcvseq (0), dns_sndseq (0)
1232	#endif	1426	#endif
		1427	data_queue(conf->max_ttl, conf->max_queue + 1),
		1428	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1233	{	1429	{
		1430	rekey .set<connection, &connection::rekey_cb > (this);
		1431	keepalive .set<connection, &connection::keepalive_cb > (this);
		1432	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1433
		1434	last_establish_attempt = 0.;
1234	octx = ictx = 0;	1435	octx = ictx = 0;
1235	retry_cnt = 0;
1236		1436
1237	if (!conf->protocols) // make sure some protocol is enabled	1437	connectmode = conf->connectmode;
1238	conf->protocols = PROT_UDPv4;
1239		1438
1240	connectmode = conf_node::C_ALWAYS; // initial setting	1439	// queue a dummy packet to force an initial connection attempt
		1440	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1441	vpn_queue.put (new net_packet);
		1442
1241	reset_connection ();	1443	reset_connection ();
1242	}	1444	}
1243		1445
1244	connection::~connection ()	1446	connection::~connection ()
1245	{	1447	{
1246	shutdown ();	1448	shutdown ();
1247	}	1449	}
1248		1450
		1451	void
1249	void connection_init ()	1452	connection_init ()
1250	{	1453	{
1251	auth_rate_limiter.clear ();	1454	auth_rate_limiter.clear ();
1252	reset_rate_limiter.clear ();	1455	reset_rate_limiter.clear ();
1253	}	1456	}
1254		1457

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Comparing gvpe/src/connection.C (file contents): Revision 1.42 by pcg, Thu Mar 3 16:54:34 2005 UTC vs. Revision 1.107 by root, Fri Sep 20 11:57:03 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.42 by pcg, Thu Mar 3 16:54:34 2005 UTC vs.
Revision 1.107 by root, Fri Sep 20 11:57:03 2013 UTC