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

Comparing gvpe/src/connection.C (file contents):
Revision 1.47 by pcg, Mon Mar 7 01:31:26 2005 UTC vs.
Revision 1.108 by root, Fri Oct 11 04:07:24 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	{
592	if (ictx && octx)	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	vpn->can_direct (THISNODE, conf) ? "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."));
593	{	714	}
594	connectmode = conf->connectmode;	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);
595		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
596	// make sure rekeying timeouts are slightly asymmetric	724	// make sure rekeying timeouts are slightly asymmetric
597	rekey.start (NOW + ::conf.rekey	725	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
598	+ (conf->id > THISNODE->id ? 10 : 0));	726	rekey.start (rekey_interval, rekey_interval);
		727
		728	hmac_error = 0.;
		729
599	keepalive.start (NOW + ::conf.keepalive);	730	keepalive.start (::conf.keepalive);
600		731
601	// send queued packets	732	// send queued packets
602	if (ictx && octx)
603	{
604	while (tap_packet p = (tap_packet )data_queue.get ())	733	while (tap_packet p = (tap_packet )data_queue.get ())
605	{	734	{
606	send_data_packet (p);	735	if (p->len) send_data_packet (p);
607	delete p;	736	delete p;
608	}	737	}
609		738
610	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	739	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
611	{	740	{
612	send_vpn_packet (p, si, IPTOS_RELIABILITY);	741	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
613	delete p;	742	delete p;
614	}
615	}
616	}	743	}
		744
		745	vpn->connection_established (this);
		746	}
		747
		748	void
		749	connection::reset_si ()
		750	{
		751	if (vpn->can_direct (THISNODE, conf))
		752	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
617	else	753	else
618	{	754	{
619	retry_cnt = 0;	755	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
620	establish_connection.start (NOW + 5);	756	protocol = 0;
621	keepalive.stop ();
622	rekey.stop ();
623	}	757	}
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		758
636	si.set (conf, protocol);	759	si.set (conf, protocol);
637	}	760	}
638		761
639	// ensure sockinfo is valid, forward if necessary	762	// ensure sockinfo is valid, forward if necessary
640	const sockinfo &	763	const sockinfo &
641	connection::forward_si (const sockinfo &si) const	764	connection::forward_si (const sockinfo &si) const
642	{	765	{
643	if (!si.valid ())	766	if (!si.valid ())
644	{	767	{
645	connection *r = vpn->find_router ();	768	connection *r = vpn->find_router_for (this);
646		769
647	if (r)	770	if (r)
648	{	771	{
649	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	772	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
650	conf->nodename, r->conf->nodename, (const char *)r->si);	773	conf->nodename, r->conf->nodename);
651	return r->si;	774	return r->si;
652	}	775	}
653	else	776	else
654	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	777	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
655	conf->nodename);	778	conf->nodename);
656	}	779	}
657		780
658	return si;	781	return si;
659	}	782	}
660		783
661	void	784	void
662	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	785	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
663	{	786	{
664	if (!vpn->send_vpn_packet (pkt, si, tos))	787	if (!vpn->send_vpn_packet (pkt, si, tos))
665	reset_connection ();	788	reset_connection ("packet send error");
666	}	789	}
667		790
668	void	791	void
669	connection::send_ping (const sockinfo &si, u8 pong)	792	connection::send_ping (const sockinfo &si, u8 pong)
670	{	793	{
671	ping_packet *pkt = new ping_packet;	794	ping_packet *pkt = new ping_packet;
672		795
673	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	796	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		797
		798	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
674	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	799	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
675		800
676	delete pkt;	801	delete pkt;
677	}	802	}
678		803
…		…
693	void	818	void
694	connection::send_auth_request (const sockinfo &si, bool initiate)	819	connection::send_auth_request (const sockinfo &si, bool initiate)
695	{	820	{
696	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	821	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
697		822
698	rsachallenge chg;	823	generate_auth_data ();
699	rsa_cache.gen (pkt->id, chg);
700	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	824	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
701		825
702	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	826	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
703
704	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	827	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
705		828
706	delete pkt;	829	delete pkt;
707	}	830	}
708		831
709	void	832	void
710	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	833	connection::send_auth_response (const sockinfo &si)
711	{	834	{
712	auth_res_packet *pkt = new auth_res_packet (conf->id);	835	auth_res_packet *pkt = new auth_res_packet (conf->id);
713		836
714	pkt->id = id;	837	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof rcv_ecdh_b);
		838	auth_hash (rcv_auth, rcv_ecdh_b, pkt->response.mac);
715		839
716	rsa_hash (id, chg, pkt->response);
717
718	pkt->hmac_set (octx);
719
720	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	840	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
721
722	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	841	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
723		842
724	delete pkt;	843	delete pkt;
725	}	844	}
726		845
727	void	846	void
728	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	847	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
729	{	848	{
730	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	849	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
731	conf->id, rid, (const char *)rsi);	850	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		851	conf->protocols);
732		852
733	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	853	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
734		854
735	r->hmac_set (octx);	855	r->hmac_set (octx);
736	send_vpn_packet (r, si);	856	send_vpn_packet (r, si);
737		857
738	delete r;	858	delete r;
739	}	859	}
740		860
741	void	861	inline void
742	connection::establish_connection_cb (time_watcher &w)	862	connection::establish_connection_cb (ev::timer &w, int revents)
743	{	863	{
744	if (!ictx	864	if (!(ictx && octx)
745	&& conf != THISNODE	865	&& conf != THISNODE
746	&& connectmode != conf_node::C_NEVER	866	&& connectmode != conf_node::C_NEVER
747	&& connectmode != conf_node::C_DISABLED	867	&& connectmode != conf_node::C_DISABLED
748	&& NOW > w.at)	868	&& !w.is_active ())
749	{	869	{
750	w.at = TSTAMP_MAX; // first disable this watcher in case of recursion	870	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		871	// and stop trying. should probably be handled by a per-connection expire handler.
		872	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		873	{
		874	reset_connection ("no demand");
		875	return;
		876	}
751		877
752	double retry_int = double (retry_cnt & 3	878	last_establish_attempt = ev_now ();
		879
		880	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
753	? (retry_cnt & 3) + 1	881	? (retry_cnt & 3) + 1
754	: 1 << (retry_cnt >> 2));	882	: 1 << (retry_cnt >> 2));
755		883
756	reset_si ();	884	reset_si ();
757		885
758	bool slow = si.prot & PROT_SLOW;	886	bool slow = si.prot & PROT_SLOW;
759		887
760	if (si.prot && !si.host)	888	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		889	{
		890	/TODO/ /* start the timer so we don't recurse endlessly */
		891	w.start (1);
761	vpn->send_connect_request (conf->id);	892	vpn->send_connect_request (this);
		893	}
762	else	894	else
763	{	895	{
		896	if (si.valid ())
		897	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		898	conf->nodename, (const char *)si);
		899
764	const sockinfo &dsi = forward_si (si);	900	const sockinfo &dsi = forward_si (si);
765		901
766	slow = slow \|\| (dsi.prot & PROT_SLOW);	902	slow = slow \|\| (dsi.prot & PROT_SLOW);
767		903
768	if (dsi.valid () && auth_rate_limiter.can (dsi))	904	if (dsi.valid () && auth_rate_limiter.can (dsi))
…		…
772	else	908	else
773	send_ping (dsi, 0);	909	send_ping (dsi, 0);
774	}	910	}
775	}	911	}
776		912
777	retry_int *= slow ? 3. : 0.7;	913	retry_int *= slow ? 8. : 0.9;
778		914
779	if (retry_int < conf->max_retry)	915	if (retry_int < conf->max_retry)
780	retry_cnt++;	916	retry_cnt++;
781	else	917	else
782	retry_int = conf->max_retry;	918	retry_int = conf->max_retry;
783		919
784	w.start (NOW + retry_int);	920	w.start (retry_int);
785	}	921	}
786	}	922	}
787		923
788	void	924	void
789	connection::reset_connection ()	925	connection::reset_connection (const char *reason)
790	{	926	{
791	if (ictx && octx)	927	if (ictx && octx)
792	{	928	{
793	slog (L_INFO, _("%s(%s): connection lost"),	929	slog (L_INFO, _("%s(%s): connection lost (%s)"),
794	conf->nodename, (const char *)si);	930	conf->nodename, (const char *)si, reason);
795		931
796	if (::conf.script_node_down)	932	if (::conf.script_node_down)
797	run_script (run_script_cb (this, &connection::script_node_down), false);	933	{
		934	run_script_cb *cb = new run_script_cb;
		935	cb->set<connection, &connection::script_node_down> (this);
		936	run_script_queued (cb, _("node-down command execution failed, continuing."));
		937	}
798	}	938	}
799		939
800	delete ictx; ictx = 0;	940	delete ictx; ictx = 0;
801	delete octx; octx = 0;	941	delete octx; octx = 0;
802	#if ENABLE_DNS
803	dnsv4_reset_connection ();
804	#endif
805		942
806	si.host = 0;	943	si.host = 0;
807		944
		945	have_snd_auth = false;
		946	have_rcv_auth = false;
		947	auth_expire = 0.;
		948
808	last_activity = 0;	949	last_activity = 0.;
		950	//last_si_change = 0.;
809	retry_cnt = 0;	951	retry_cnt = 0;
810		952
811	rekey.stop ();	953	rekey.stop ();
812	keepalive.stop ();	954	keepalive.stop ();
813	establish_connection.stop ();	955	establish_connection.stop ();
…		…
817	connection::shutdown ()	959	connection::shutdown ()
818	{	960	{
819	if (ictx && octx)	961	if (ictx && octx)
820	send_reset (si);	962	send_reset (si);
821		963
822	reset_connection ();	964	reset_connection ("shutdown");
823	}	965	}
824		966
825	void	967	// poor-man's rekeying
826	connection::rekey_cb (time_watcher &w)	968	inline void
		969	connection::rekey_cb (ev::timer &w, int revents)
827	{	970	{
828	reset_connection ();	971	reset_connection ("rekeying");
829	establish_connection ();	972	establish_connection ();
830	}	973	}
831		974
832	void	975	void
833	connection::send_data_packet (tap_packet *pkt)	976	connection::send_data_packet (tap_packet *pkt)
…		…
847	if (oseqno > MAX_SEQNO)	990	if (oseqno > MAX_SEQNO)
848	rekey ();	991	rekey ();
849	}	992	}
850		993
851	void	994	void
		995	connection::post_inject_queue ()
		996	{
		997	// force a connection every now and when when packets are sent (max 1/s)
		998	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		999	establish_connection.stop ();
		1000
		1001	establish_connection ();
		1002	}
		1003
		1004	void
852	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1005	connection::inject_data_packet (tap_packet *pkt)
853	{	1006	{
854	if (ictx && octx)	1007	if (ictx && octx)
855	send_data_packet (pkt);	1008	send_data_packet (pkt);
856	else	1009	else
857	{	1010	{
858	if (!broadcast)//DDDD
859	data_queue.put (new tap_packet (*pkt));	1011	data_queue.put (new tap_packet (*pkt));
860		1012	post_inject_queue ();
861	establish_connection ();
862	}	1013	}
863	}	1014	}
864		1015
		1016	void
865	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1017	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
866	{	1018	{
867	if (ictx && octx)	1019	if (ictx && octx)
868	send_vpn_packet (pkt, si, tos);	1020	send_vpn_packet (pkt, si, tos);
869	else	1021	else
870	{	1022	{
871	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1023	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
872		1024	post_inject_queue ();
873	establish_connection ();
874	}	1025	}
875	}	1026	}
876		1027
877	void	1028	void
878	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1029	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
879	{	1030	{
880	last_activity = NOW;	1031	last_activity = ev_now ();
881		1032
882	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1033	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
883	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1034	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1035
		1036	if (connectmode == conf_node::C_DISABLED)
		1037	return;
884		1038
885	switch (pkt->typ ())	1039	switch (pkt->typ ())
886	{	1040	{
887	case vpn_packet::PT_PING:	1041	case vpn_packet::PT_PING:
		1042	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1043
888	// we send pings instead of auth packets after some retries,	1044	// we send pings instead of auth packets after some retries,
889	// so reset the retry counter and establish a connection	1045	// so reset the retry counter and establish a connection
890	// when we receive a ping.	1046	// when we receive a ping.
891	if (!ictx)	1047	if (!ictx)
892	{	1048	{
893	if (auth_rate_limiter.can (rsi))	1049	if (auth_rate_limiter.can (rsi))
894	send_auth_request (rsi, true);	1050	send_auth_request (rsi, true);
895	}	1051	}
896	else	1052	else
		1053	// we would love to change the socket address here, but ping's aren't
		1054	// authenticated, so we best ignore it.
897	send_ping (rsi, 1); // pong	1055	send_ping (rsi, 1); // pong
898		1056
899	break;	1057	break;
900		1058
901	case vpn_packet::PT_PONG:	1059	case vpn_packet::PT_PONG:
		1060	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1061
		1062	// a PONG might mean that the other side doesn't really know
		1063	// about our desire for communication.
		1064	establish_connection ();
902	break;	1065	break;
903		1066
904	case vpn_packet::PT_RESET:	1067	case vpn_packet::PT_RESET:
		1068	slog (L_TRACE, "%s >> PT_RESET", conf->nodename);
		1069
		1070	if (ictx && octx)
905	{	1071	{
906	reset_connection ();	1072	reset_connection ("remote reset");
907		1073
908	config_packet p = (config_packet ) pkt;	1074	config_packet p = (config_packet ) pkt;
909		1075
910	if (!p->chk_config ())	1076	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
911	{
912	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
913	conf->nodename, (const char *)rsi);
914	connectmode = conf_node::C_DISABLED;
915	}
916	else if (connectmode == conf_node::C_ALWAYS)
917	establish_connection ();	1077	establish_connection ();
918	}	1078	}
		1079
919	break;	1080	break;
920		1081
921	case vpn_packet::PT_AUTH_REQ:	1082	case vpn_packet::PT_AUTH_REQ:
922	if (auth_rate_limiter.can (rsi))	1083	if (auth_rate_limiter.can (rsi))
923	{	1084	{
924	auth_req_packet p = (auth_req_packet ) pkt;	1085	auth_req_packet p = (auth_req_packet )pkt;
925		1086
926	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1087	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1088	conf->nodename, p->initiate ? "initiate" : "reply",
		1089	p->protocols, p->features);
927		1090
928	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1091	if (memcmp (p->magic, MAGIC, 8))
		1092	{
		1093	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1094	conf->nodename, (const char *)rsi);
		1095	}
		1096	else if (p->chk_config (conf, rsi))
929	{	1097	{
930	if (p->prot_minor != PROTOCOL_MINOR)	1098	if (p->prot_minor != PROTOCOL_MINOR)
931	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1099	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
932	conf->nodename, (const char *)rsi,	1100	conf->nodename, (const char *)rsi,
933	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1101	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
934		1102
935	if (p->initiate)	1103	if (p->initiate)
		1104	{
936	send_auth_request (rsi, false);	1105	send_auth_request (rsi, false);
937		1106
938	rsachallenge k;	1107	if (ictx && octx)
		1108	reset_connection ("reconnect");
		1109	}
939		1110
		1111	auth_data auth;
		1112
940	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1113	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
941	{	1114	{
942	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1115	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
943	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1116	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
944	break;
945	}	1117	}
946	else	1118	else
947	{	1119	{
948	delete octx;	1120	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
949		1121
950	octx = new crypto_ctx (k, 1);	1122	rcv_auth = auth;
951	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1123	have_rcv_auth = true;
952		1124
953	// compatibility code, remove when no longer required	1125	send_auth_response (rsi);
954	if (p->flags & 1) p->features \|= FEATURE_COMPRESSION;
955		1126
		1127	if (chg)
		1128	{
956	conf->protocols = p->protocols;	1129	conf->protocols = p->protocols;
957	features = p->features & config_packet::get_features ();	1130	features = p->features & config_packet::get_features ();
958		1131
959	send_auth_response (rsi, p->id, k);
960
961	connection_established ();	1132	connection_established (rsi);
962
963	break;	1133	}
964	}	1134	}
		1135
		1136	break;
965	}	1137	}
966	else
967	slog (L_WARN, _("%s(%s): protocol mismatch"),
968	conf->nodename, (const char *)rsi);
969		1138
970	send_reset (rsi);	1139	send_reset (rsi);
971	}	1140	}
972		1141
973	break;	1142	break;
974		1143
975	case vpn_packet::PT_AUTH_RES:	1144	case vpn_packet::PT_AUTH_RES:
976	{	1145	{
977	auth_res_packet p = (auth_res_packet ) pkt;	1146	auth_res_packet p = (auth_res_packet )pkt;
978		1147
979	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1148	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
980		1149
981	if (p->chk_config ())	1150	auth_mac local_mac;
		1151	auth_hash (snd_auth, p->response.ecdh, local_mac);
		1152
		1153	if (memcmp (&p->response.mac, local_mac, sizeof local_mac))
982	{	1154	{
983	if (p->prot_minor != PROTOCOL_MINOR)
984	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
985	conf->nodename, (const char *)rsi,
986	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
987
988	rsachallenge chg;
989
990	if (!rsa_cache.find (p->id, chg))
991	{
992	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1155	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
993	conf->nodename, (const char *)rsi);	1156	conf->nodename, (const char *)rsi);
994	break;
995	}	1157	}
996	else	1158	else if (!have_snd_auth)
997	{	1159	{
998	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1160	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
999		1161
1000	if (!p->hmac_chk (cctx))	1162	have_snd_auth = true;
1001	{
1002	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1003	"could be an attack, or just corruption or a synchronization error"),
1004	conf->nodename, (const char *)rsi);
1005	break;
1006	}
1007	else
1008	{
1009	rsaresponse h;
1010
1011	rsa_hash (p->id, chg, h);
1012
1013	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1014	{
1015	prot_minor = p->prot_minor;
1016
1017	delete ictx; ictx = cctx;
1018
1019	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1020
1021	si = rsi;
1022	protocol = rsi.prot;
1023
1024	connection_established ();	1163	connection_established (rsi);
1025
1026	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1027	conf->nodename, (const char *)rsi,
1028	p->prot_major, p->prot_minor);
1029
1030	if (::conf.script_node_up)
1031	run_script (run_script_cb (this, &connection::script_node_up), false);
1032
1033	break;
1034	}
1035	else
1036	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1037	conf->nodename, (const char *)rsi);
1038	}
1039
1040	delete cctx;
1041	}
1042	}	1164	}
1043	}	1165	}
1044
1045	send_reset (rsi);
1046	break;	1166	break;
1047		1167
1048	case vpn_packet::PT_DATA_COMPRESSED:	1168	case vpn_packet::PT_DATA_COMPRESSED:
1049	#if !ENABLE_COMPRESSION	1169	#if !ENABLE_COMPRESSION
1050	send_reset (rsi);	1170	send_reset (rsi);
…		…
1056	if (ictx && octx)	1176	if (ictx && octx)
1057	{	1177	{
1058	vpndata_packet p = (vpndata_packet )pkt;	1178	vpndata_packet p = (vpndata_packet )pkt;
1059		1179
1060	if (!p->hmac_chk (ictx))	1180	if (!p->hmac_chk (ictx))
		1181	{
		1182	// rekeying often creates temporary hmac auth floods
		1183	// we assume they don't take longer than a few seconds normally,
		1184	// and suppress messages and resets during that time.
		1185	//TODO: should be done per source address
		1186	if (!hmac_error)
		1187	{
		1188	hmac_error = ev_now () + 3;
		1189	break;
		1190	}
		1191	else if (hmac_error >= ev_now ())
		1192	break; // silently suppress
		1193	else
		1194	{
1061	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1195	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1062	"could be an attack, or just corruption or a synchronization error"),	1196	"could be an attack, or just corruption or a synchronization error."),
1063	conf->nodename, (const char *)rsi);	1197	conf->nodename, (const char *)rsi);
		1198	// reset
		1199	}
		1200	}
1064	else	1201	else
1065	{	1202	{
1066	u32 seqno;	1203	u32 seqno;
1067	tap_packet *d = p->unpack (this, seqno);	1204	tap_packet *d = p->unpack (this, seqno);
		1205	int seqclass = iseqno.seqno_classify (seqno);
1068		1206
1069	if (iseqno.recv_ok (seqno))	1207	hmac_error = 0;
		1208
		1209	if (seqclass == 0) // ok
1070	{	1210	{
1071	vpn->tap->send (d);	1211	vpn->tap->send (d);
1072		1212
1073	if (si != rsi)	1213	if (si != rsi)
1074	{	1214	{
1075	// fast re-sync on connection changes, useful especially for tcp/ip	1215	// fast re-sync on source address changes, useful especially for tcp/ip
		1216	//if (last_si_change < ev_now () + 5.)
1076	si = rsi;	1217	// {
1077
1078	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1218	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1079	conf->nodename, (const char )si, (const char )rsi);	1219	conf->nodename, (const char )si, (const char )rsi);
		1220
		1221	si = rsi;
		1222
		1223	if (::conf.script_node_change)
		1224	{
		1225	run_script_cb *cb = new run_script_cb;
		1226	cb->set<connection, &connection::script_node_change> (this);
		1227	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1228	}
		1229
		1230	// }
		1231	//else
		1232	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1233	// conf->nodename, (const char )si, (const char )rsi);
1080	}	1234	}
		1235	}
		1236	else if (seqclass == 1) // far history
		1237	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1238	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1239	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1240	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1241	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1242	else if (seqclass == 3) // reset
		1243	{
		1244	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1245	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1246	send_reset (rsi);
1081	}	1247	}
1082		1248
1083	delete d;	1249	delete d;
1084	break;	1250	break;
1085	}	1251	}
…		…
1089	break;	1255	break;
1090		1256
1091	case vpn_packet::PT_CONNECT_REQ:	1257	case vpn_packet::PT_CONNECT_REQ:
1092	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1258	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1093	{	1259	{
1094	connect_req_packet p = (connect_req_packet ) pkt;	1260	connect_req_packet p = (connect_req_packet )pkt;
1095		1261
1096	assert (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 ())
1097	connection *c = vpn->conns[p->id - 1];
1098	conf->protocols = p->protocols;
1099
1100	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1101	conf->id, p->id, c->ictx && c->octx);
1102
1103	if (c->ictx && c->octx)
1104	{	1263	{
		1264	connection *c = vpn->conns[p->id - 1];
		1265	conf->protocols = p->protocols;
		1266
		1267	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1268	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1269	p->protocols,
		1270	c->ictx && c->octx);
		1271
		1272	if (c->ictx && c->octx)
		1273	{
1105	// send connect_info packets to both sides, in case one is	1274	// send connect_info packets to both sides, in case one is
1106	// behind a nat firewall (or both ;)	1275	// behind a nat firewall (or both ;)
1107	c->send_connect_info (conf->id, si, conf->protocols);	1276	c->send_connect_info (conf->id, si, conf->protocols);
1108	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1277	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1278	}
		1279	else
		1280	c->establish_connection ();
1109	}	1281	}
1110	else	1282	else
1111	c->establish_connection ();	1283	slog (L_WARN,
		1284	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1285	p->id);
1112	}	1286	}
1113		1287
1114	break;	1288	break;
1115		1289
1116	case vpn_packet::PT_CONNECT_INFO:	1290	case vpn_packet::PT_CONNECT_INFO:
1117	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1291	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1118	{	1292	{
1119	connect_info_packet p = (connect_info_packet )pkt;	1293	connect_info_packet p = (connect_info_packet )pkt;
1120		1294
1121	if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything	1295	if (p->id > 0 && p->id <= vpn->conns.size ())
1122	{	1296	{
1123	connection *c = vpn->conns[p->id - 1];	1297	connection *c = vpn->conns[p->id - 1];
1124		1298
1125	c->conf->protocols = p->protocols;	1299	c->conf->protocols = p->protocols;
1126	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1300	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1127	p->si.upgrade_protocol (protocol, c->conf);	1301	p->si.upgrade_protocol (protocol, c->conf);
1128		1302
1129	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1303	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1130	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1304	conf->nodename,
		1305	vpn->conns[p->id - 1]->conf->nodename,
		1306	(const char *)p->si,
		1307	p->protocols,
		1308	protocol,
		1309	p->si.supported_protocols (c->conf),
		1310	!c->ictx && !c->octx);
1131		1311
1132	const sockinfo &dsi = forward_si (p->si);	1312	const sockinfo &dsi = forward_si (p->si);
1133		1313
1134	if (dsi.valid ())	1314	if (dsi.valid ())
1135	c->send_auth_request (dsi, true);	1315	c->send_auth_request (dsi, true);
		1316	else
		1317	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1318	vpn->conns[p->id - 1]->conf->nodename,
		1319	(const char *)p->si);
1136	}	1320	}
		1321	else
		1322	slog (L_WARN,
		1323	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1324	p->id);
1137	}	1325	}
1138		1326
1139	break;	1327	break;
1140		1328
1141	default:	1329	default:
1142	send_reset (rsi);	1330	send_reset (rsi);
1143	break;	1331	break;
1144	}	1332	}
1145	}	1333	}
1146		1334
1147	void connection::keepalive_cb (time_watcher &w)	1335	inline void
		1336	connection::keepalive_cb (ev::timer &w, int revents)
1148	{	1337	{
1149	if (NOW >= last_activity + ::conf.keepalive + 30)	1338	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1339
		1340	if (when >= 0)
		1341	w.start (when);
		1342	else if (when < -15)
1150	{	1343	{
1151	reset_connection ();	1344	reset_connection ("keepalive overdue");
1152	establish_connection ();	1345	establish_connection ();
1153	}	1346	}
1154	else if (NOW < last_activity + ::conf.keepalive)
1155	w.start (last_activity + ::conf.keepalive);
1156	else if (conf->connectmode != conf_node::C_ONDEMAND	1347	else if (conf->connectmode != conf_node::C_ONDEMAND
1157	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1348	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1158	{	1349	{
		1350	w.start (3);
1159	send_ping (si);	1351	send_ping (si);
1160	w.start (NOW + 5);
1161	}	1352	}
1162	else if (NOW < last_activity + ::conf.keepalive + 10)	1353	else if (when >= -10)
1163	// hold ondemand connections implicitly a few seconds longer	1354	// hold ondemand connections implicitly a few seconds longer
1164	// should delete octx, though, or something like that ;)	1355	// should delete octx, though, or something like that ;)
1165	w.start (last_activity + ::conf.keepalive + 10);	1356	w.start (when + 10);
1166	else	1357	else
1167	reset_connection ();	1358	reset_connection ("keepalive timeout");
1168	}	1359	}
1169		1360
		1361	void
1170	void connection::send_connect_request (int id)	1362	connection::send_connect_request (int id)
1171	{	1363	{
1172	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1364	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1173		1365
1174	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1366	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1367	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1368	THISNODE->protocols);
1175	p->hmac_set (octx);	1369	p->hmac_set (octx);
1176	send_vpn_packet (p, si);	1370	send_vpn_packet (p, si);
1177		1371
1178	delete p;	1372	delete p;
1179	}	1373	}
1180		1374
1181	void connection::script_node ()	1375	void
		1376	connection::script_init_env (const char *ext)
1182	{	1377	{
1183	vpn->script_if_up ();
1184
1185	char *env;	1378	char *env;
		1379	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1380	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1381	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1382	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1383	conf->id & 0xff); putenv (env);
		1384	}
		1385
		1386	void
		1387	connection::script_init_connect_env ()
		1388	{
		1389	vpn->script_init_env ();
		1390
		1391	char *env;
1186	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1392	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1393	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1187	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1394	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1188	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1395	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1189	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1396	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1190	}	1397	}
1191		1398
		1399	inline const char *
1192	const char *connection::script_node_up ()	1400	connection::script_node_up ()
1193	{	1401	{
1194	script_node ();	1402	script_init_connect_env ();
1195		1403
1196	putenv ("STATE=up");	1404	putenv ((char *)"STATE=up");
1197		1405
		1406	char *filename;
		1407	asprintf (&filename,
		1408	"%s/%s",
		1409	confbase,
1198	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1410	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1199	}
1200		1411
		1412	return filename;
		1413	}
		1414
		1415	inline const char *
		1416	connection::script_node_change ()
		1417	{
		1418	script_init_connect_env ();
		1419
		1420	putenv ((char *)"STATE=change");
		1421
		1422	char *filename;
		1423	asprintf (&filename,
		1424	"%s/%s",
		1425	confbase,
		1426	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1427
		1428	return filename;
		1429	}
		1430
		1431	inline const char *
1201	const char *connection::script_node_down ()	1432	connection::script_node_down ()
1202	{	1433	{
1203	script_node ();	1434	script_init_connect_env ();
1204		1435
1205	putenv ("STATE=down");	1436	putenv ((char *)"STATE=down");
1206		1437
1207	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1438	char *filename;
		1439	asprintf (&filename,
		1440	"%s/%s",
		1441	confbase,
		1442	::conf.script_node_down ? ::conf.script_node_down : "node-down");
		1443
		1444	return filename;
1208	}	1445	}
1209		1446
1210	connection::connection (struct vpn vpn, conf_node conf)	1447	connection::connection (struct vpn vpn, conf_node conf)
1211	: vpn(vpn), conf(conf)	1448	: vpn(vpn), conf(conf),
1212	, rekey (this, &connection::rekey_cb)
1213	, keepalive (this, &connection::keepalive_cb)
1214	, establish_connection (this, &connection::establish_connection_cb)
1215	#if ENABLE_DNS	1449	#if ENABLE_DNS
1216	, dns (0)	1450	dns (0),
1217	#endif	1451	#endif
		1452	data_queue(conf->max_ttl, conf->max_queue + 1),
		1453	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1218	{	1454	{
		1455	rekey .set<connection, &connection::rekey_cb > (this);
		1456	keepalive .set<connection, &connection::keepalive_cb > (this);
		1457	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1458
		1459	last_establish_attempt = 0.;
1219	octx = ictx = 0;	1460	octx = ictx = 0;
1220	retry_cnt = 0;
1221		1461
1222	if (!conf->protocols) // make sure some protocol is enabled	1462	connectmode = conf->connectmode;
1223	conf->protocols = PROT_UDPv4;
1224		1463
1225	connectmode = conf_node::C_ALWAYS; // initial setting	1464	// queue a dummy packet to force an initial connection attempt
		1465	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1466	vpn_queue.put (new net_packet);
		1467
1226	reset_connection ();	1468	reset_connection ("startup");
1227	}	1469	}
1228		1470
1229	connection::~connection ()	1471	connection::~connection ()
1230	{	1472	{
1231	shutdown ();	1473	shutdown ();
1232	}	1474	}
1233		1475
		1476	void
1234	void connection_init ()	1477	connection_init ()
1235	{	1478	{
1236	auth_rate_limiter.clear ();	1479	auth_rate_limiter.clear ();
1237	reset_rate_limiter.clear ();	1480	reset_rate_limiter.clear ();
1238	}	1481	}
1239		1482

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing gvpe/src/connection.C (file contents): Revision 1.47 by pcg, Mon Mar 7 01:31:26 2005 UTC vs. Revision 1.108 by root, Fri Oct 11 04:07:24 2013 UTC

Diff Legend

Comparing gvpe/src/connection.C (file contents):
Revision 1.47 by pcg, Mon Mar 7 01:31:26 2005 UTC vs.
Revision 1.108 by root, Fri Oct 11 04:07:24 2013 UTC