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

Comparing gvpe/src/connection.C (file contents):
Revision 1.22 by pcg, Thu Oct 16 02:41:21 2003 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003 Marc Lehmann <pcg@goof.com>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
		5	This file is part of GVPE.
		6
5	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
6	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
7	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
8	(at your option) any later version.	10	option) any later version.
9		11
10	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
11	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13	GNU General Public License for more details.	15	Public License for more details.
14		16
15	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
16	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
17	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
18	*/	30	*/
19		31
20	#include "config.h"	32	#include "config.h"
21		33
22	extern "C" {
23	# include "lzf/lzf.h"
24	}
25
26	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
27		37
28	#include <openssl/rand.h>	38	#include <openssl/rand.h>
29	#include <openssl/evp.h>	39	#include <openssl/evp.h>
30	#include <openssl/rsa.h>	40	#include <openssl/rsa.h>
31	#include <openssl/err.h>	41	#include <openssl/err.h>
32
33	#include "gettext.h"
34		42
35	#include "conf.h"	43	#include "conf.h"
36	#include "slog.h"	44	#include "slog.h"
37	#include "device.h"	45	#include "device.h"
38	#include "vpn.h"	46	#include "vpn.h"
39	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
40		49
41	#include "netcompat.h"	50	#include "netcompat.h"
42		51
43	#if !HAVE_RAND_PSEUDO_BYTES
44	# define RAND_pseudo_bytes RAND_bytes
45	#endif
46
47	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	52	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
		53
		54	#define ULTRA_FAST 1
		55	#define HLOG 15
		56	#include "lzf/lzf.h"
		57	#include "lzf/lzf_c.c"
		58	#include "lzf/lzf_d.c"
		59
		60	//////////////////////////////////////////////////////////////////////////////
		61
		62	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		63	static ev::child rs_child_ev;
		64
		65	namespace
		66	{
		67	void // c++ requires external linkage here, apparently :(
		68	rs_child_cb (ev::child &w, int revents)
		69	{
		70	w.stop ();
		71
		72	if (rs_queue.empty ())
		73	return;
		74
		75	pid_t pid = run_script (*rs_queue.front ().first, false);
		76	if (pid)
		77	{
		78	w.set (pid);
		79	w.start ();
		80	}
		81	else
		82	slog (L_WARN, rs_queue.front ().second);
		83
		84	delete rs_queue.front ().first;
		85	rs_queue.pop ();
		86	}
		87	};
		88
		89	// despite the fancy name, this is quite a hack
		90	static void
		91	run_script_queued (run_script_cb cb, const char warnmsg)
		92	{
		93	rs_queue.push (std::make_pair (cb, warnmsg));
		94
		95	if (!rs_child_ev.is_active ())
		96	{
		97	rs_child_ev.set<rs_child_cb> ();
		98	rs_child_ev ();
		99	}
		100	}
		101
		102	//////////////////////////////////////////////////////////////////////////////
48		103
49	struct crypto_ctx	104	struct crypto_ctx
50	{	105	{
51	EVP_CIPHER_CTX cctx;	106	EVP_CIPHER_CTX cctx;
52	HMAC_CTX hctx;	107	HMAC_CTX hctx;
53		108
54	crypto_ctx (const rsachallenge &challenge, int enc);	109	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
55	~crypto_ctx ();	110	~crypto_ctx ();
56	};	111	};
57		112
58	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	113	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
59	{	114	{
		115	ecdh_key s;
		116
		117	curve25519_combine (a, b, s);
		118
		119	{
		120	u8 mac_key[MAC_KEYSIZE];
		121	static const unsigned char mac_info[] = "gvpe mac key";
		122
		123	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		124	kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		125	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		126	kdf.extract (s, sizeof (s));
		127	kdf.extract_done (HKDF_PRF_HASH ());
		128	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		129
		130	HMAC_CTX_init (&hctx);
		131	require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		132	}
		133
		134	{
		135	u8 cipher_key[CIPHER_KEYSIZE];
		136	static const unsigned char cipher_info[] = "gvpe cipher key";
		137
		138	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		139	kdf.extract (auth2.rsa.ikm, sizeof (auth2.rsa.ikm));
		140	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		141	kdf.extract (s, sizeof (s));
		142	kdf.extract_done (HKDF_PRF_HASH ());
		143	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		144
60	EVP_CIPHER_CTX_init (&cctx);	145	EVP_CIPHER_CTX_init (&cctx);
61	EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc);	146	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
62	HMAC_CTX_init (&hctx);	147	}
63	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
64	}	148	}
65		149
66	crypto_ctx::~crypto_ctx ()	150	crypto_ctx::~crypto_ctx ()
67	{	151	{
68	EVP_CIPHER_CTX_cleanup (&cctx);	152	require (EVP_CIPHER_CTX_cleanup (&cctx));
69	HMAC_CTX_cleanup (&hctx);	153	HMAC_CTX_cleanup (&hctx);
70	}	154	}
71		155
		156	static inline void
		157	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		158	{
		159	if (RSA_public_encrypt (sizeof (auth.rsa),
		160	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		161	key, RSA_PKCS1_OAEP_PADDING) < 0)
		162	fatal ("RSA_public_encrypt error");
		163
		164	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		165	}
		166
		167	static inline bool
		168	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		169	{
		170	u8 rsa_decrypt[RSA_KEYLEN];
		171
		172	if (RSA_private_decrypt (sizeof (encr.rsa),
		173	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		174	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		175	return 0;
		176
		177	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		178	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		179
		180	return 1;
		181	}
		182
72	static void	183	static void
73	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	184	auth_hash (const auth_data &auth, auth_mac &mac)
74	{	185	{
75	EVP_MD_CTX ctx;	186	HMAC_CTX ctx;
76		187
77	EVP_MD_CTX_init (&ctx);	188	HMAC_CTX_init (&ctx);
78	EVP_DigestInit (&ctx, RSA_HASH);	189	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
79	EVP_DigestUpdate(&ctx, &chg, sizeof chg);	190	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
80	EVP_DigestUpdate(&ctx, &id, sizeof id);	191	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
81	EVP_DigestFinal (&ctx, (unsigned char *)&h, 0);
82	EVP_MD_CTX_cleanup (&ctx);	192	HMAC_CTX_cleanup (&ctx);
83	}	193	}
84		194
85	struct rsa_entry {	195	void
86	tstamp expire;	196	connection::generate_auth_data ()
87	rsaid id;
88	rsachallenge chg;
89	};
90
91	struct rsa_cache : list<rsa_entry>
92	{	197	{
93	void cleaner_cb (time_watcher &w); time_watcher cleaner;	198	if (auth_expire < ev_now ())
94
95	bool find (const rsaid &id, rsachallenge &chg)
96	{
97	for (iterator i = begin (); i != end (); ++i)
98	{
99	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)
100	{
101	memcpy (&chg, &i->chg, sizeof chg);
102
103	erase (i);
104	return true;
105	}
106	}
107
108	if (cleaner.at < NOW)
109	cleaner.start (NOW + RSA_TTL);
110
111	return false;
112	}
113
114	void gen (rsaid &id, rsachallenge &chg)
115	{
116	rsa_entry e;
117
118	RAND_bytes ((unsigned char *)&id, sizeof id);
119	RAND_bytes ((unsigned char *)&chg, sizeof chg);
120
121	e.expire = NOW + RSA_TTL;
122	e.id = id;
123	memcpy (&e.chg, &chg, sizeof chg);
124
125	push_back (e);
126
127	if (cleaner.at < NOW)
128	cleaner.start (NOW + RSA_TTL);
129	}
130
131	rsa_cache ()
132	: cleaner (this, &rsa_cache::cleaner_cb)
133	{ }	199	{
		200	// request data
		201	RAND_bytes ((unsigned char *)&snd_auth.rsa, sizeof snd_auth.rsa);
		202	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
		203	auth_hash (snd_auth, snd_auth_mac);
134		204
135	} rsa_cache;	205	// eventual response data
136		206	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
137	void rsa_cache::cleaner_cb (time_watcher &w)
138	{
139	if (empty ())
140	w.at = TSTAMP_CANCEL;
141	else
142	{	207	}
143	w.at = NOW + RSA_TTL;
144		208
145	for (iterator i = begin (); i != end (); )	209	// every use prolongs the expiry
146	if (i->expire <= NOW)	210	auth_expire = ev_now () + AUTH_TTL;
147	i = erase (i);
148	else
149	++i;
150	}
151	}	211	}
152		212
153	//////////////////////////////////////////////////////////////////////////////	213	//////////////////////////////////////////////////////////////////////////////
154		214
155	void pkt_queue::put (net_packet *p)	215	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		216	: max_ttl (max_ttl), max_queue (max_queue)
156	{	217	{
157	if (queue[i])	218	queue = new pkt [max_queue];
158	{
159	delete queue[i];
160	j = (j + 1) % QUEUEDEPTH;
161	}
162		219
163	queue[i] = p;
164
165	i = (i + 1) % QUEUEDEPTH;
166	}
167
168	net_packet *pkt_queue::get ()
169	{
170	net_packet *p = queue[j];
171
172	if (p)
173	{
174	queue[j] = 0;
175	j = (j + 1) % QUEUEDEPTH;
176	}
177
178	return p;
179	}
180
181	pkt_queue::pkt_queue ()
182	{
183	memset (queue, 0, sizeof (queue));
184	i = 0;	220	i = 0;
185	j = 0;	221	j = 0;
		222
		223	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
186	}	224	}
187		225
188	pkt_queue::~pkt_queue ()	226	pkt_queue::~pkt_queue ()
189	{	227	{
190	for (i = QUEUEDEPTH; --i > 0; )	228	while (net_packet *p = get ())
		229	delete p;
		230
191	delete queue[i];	231	delete [] queue;
192	}	232	}
193		233
		234	void
		235	pkt_queue::expire_cb (ev::timer &w, int revents)
		236	{
		237	ev_tstamp expire = ev_now () - max_ttl;
		238
		239	for (;;)
		240	{
		241	if (empty ())
		242	break;
		243
		244	double diff = queue[j].tstamp - expire;
		245
		246	if (diff >= 0.)
		247	{
		248	w.start (diff > 0.5 ? diff : 0.5);
		249	break;
		250	}
		251
		252	delete get ();
		253	}
		254	}
		255
		256	void
		257	pkt_queue::put (net_packet *p)
		258	{
		259	ev_tstamp now = ev_now ();
		260
		261	// start expiry timer
		262	if (empty ())
		263	expire.start (max_ttl);
		264
		265	int ni = i + 1 == max_queue ? 0 : i + 1;
		266
		267	if (ni == j)
		268	delete get ();
		269
		270	queue[i].pkt = p;
		271	queue[i].tstamp = now;
		272
		273	i = ni;
		274	}
		275
		276	net_packet *
		277	pkt_queue::get ()
		278	{
		279	if (empty ())
		280	return 0;
		281
		282	net_packet *p = queue[j].pkt;
		283	queue[j].pkt = 0;
		284
		285	j = j + 1 == max_queue ? 0 : j + 1;
		286
		287	return p;
		288	}
		289
194	struct net_rateinfo {	290	struct net_rateinfo
		291	{
195	u32 host;	292	u32 host;
196	double pcnt, diff;	293	double pcnt, diff;
197	tstamp last;	294	tstamp last;
198	};	295	};
199		296
200	// only do action once every x seconds per host whole allowing bursts.	297	// only do action once every x seconds per host whole allowing bursts.
201	// this implementation ("splay list" ;) is inefficient,	298	// this implementation ("splay list" ;) is inefficient,
202	// but low on resources.	299	// but low on resources.
203	struct net_rate_limiter : list<net_rateinfo>	300	struct net_rate_limiter : list<net_rateinfo>
204	{	301	{
205	static const double ALPHA = 1. - 1. / 600.; // allow bursts	302	# define NRL_ALPHA (1. - 1. / 600.) // allow bursts
206	static const double CUTOFF = 10.; // one event every CUTOFF seconds	303	# define NRL_CUTOFF 10. // one event every CUTOFF seconds
207	static const double EXPIRE = CUTOFF * 30.; // expire entries after this time	304	# define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time
208	static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value	305	# define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value
209		306
210	bool can (const sockinfo &si) { return can((u32)si.host); }	307	bool can (const sockinfo &si) { return can((u32)si.host); }
211	bool can (u32 host);	308	bool can (u32 host);
212	};	309	};
213		310
214	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	311	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
215		312
		313	bool
216	bool net_rate_limiter::can (u32 host)	314	net_rate_limiter::can (u32 host)
217	{	315	{
218	iterator i;	316	iterator i;
219		317
220	for (i = begin (); i != end (); )	318	for (i = begin (); i != end (); )
221	if (i->host == host)	319	if (i->host == host)
222	break;	320	break;
223	else if (i->last < NOW - EXPIRE)	321	else if (i->last < ev_now () - NRL_EXPIRE)
224	i = erase (i);	322	i = erase (i);
225	else	323	else
226	i++;	324	i++;
227		325
228	if (i == end ())	326	if (i == end ())
229	{	327	{
230	net_rateinfo ri;	328	net_rateinfo ri;
231		329
232	ri.host = host;	330	ri.host = host;
233	ri.pcnt = 1.;	331	ri.pcnt = 1.;
234	ri.diff = MAXDIF;	332	ri.diff = NRL_MAXDIF;
235	ri.last = NOW;	333	ri.last = ev_now ();
236		334
237	push_front (ri);	335	push_front (ri);
238		336
239	return true;	337	return true;
240	}	338	}
241	else	339	else
242	{	340	{
243	net_rateinfo ri (*i);	341	net_rateinfo ri (*i);
244	erase (i);	342	erase (i);
245		343
246	ri.pcnt = ri.pcnt * ALPHA;	344	ri.pcnt = ri.pcnt * NRL_ALPHA;
247	ri.diff = ri.diff * ALPHA + (NOW - ri.last);	345	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
248		346
249	ri.last = NOW;	347	ri.last = ev_now ();
250		348
251	double dif = ri.diff / ri.pcnt;	349	double dif = ri.diff / ri.pcnt;
252		350
253	bool send = dif > CUTOFF;	351	bool send = dif > NRL_CUTOFF;
254		352
255	if (dif > MAXDIF)	353	if (dif > NRL_MAXDIF)
256	{	354	{
257	ri.pcnt = 1.;	355	ri.pcnt = 1.;
258	ri.diff = MAXDIF;	356	ri.diff = NRL_MAXDIF;
259	}	357	}
260	else if (send)	358	else if (send)
261	ri.pcnt++;	359	ri.pcnt++;
262		360
263	push_front (ri);	361	push_front (ri);
268		366
269	/////////////////////////////////////////////////////////////////////////////	367	/////////////////////////////////////////////////////////////////////////////
270		368
271	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	369	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
272		370
		371	void
273	void hmac_packet::hmac_gen (crypto_ctx *ctx)	372	hmac_packet::hmac_gen (crypto_ctx *ctx)
274	{	373	{
275	unsigned int xlen;	374	unsigned int xlen;
276		375
277	HMAC_CTX *hctx = &ctx->hctx;	376	HMAC_CTX *hctx = &ctx->hctx;
278		377
279	HMAC_Init_ex (hctx, 0, 0, 0, 0);	378	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
280	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	379	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
281	len - sizeof (hmac_packet));	380	len - sizeof (hmac_packet)));
282	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	381	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
283	}	382	}
284		383
285	void	384	void
286	hmac_packet::hmac_set (crypto_ctx *ctx)	385	hmac_packet::hmac_set (crypto_ctx *ctx)
287	{	386	{
…		…
296	hmac_gen (ctx);	395	hmac_gen (ctx);
297		396
298	return !memcmp (hmac, hmac_digest, HMACLENGTH);	397	return !memcmp (hmac, hmac_digest, HMACLENGTH);
299	}	398	}
300		399
		400	void
301	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	401	vpn_packet::set_hdr (ptype type_, unsigned int dst)
302	{	402	{
303	type = type_;	403	type = type_;
304		404
305	int src = THISNODE->id;	405	int src = THISNODE->id;
306		406
…		…
310	}	410	}
311		411
312	#define MAXVPNDATA (MAX_MTU - 6 - 6)	412	#define MAXVPNDATA (MAX_MTU - 6 - 6)
313	#define DATAHDR (sizeof (u32) + RAND_SIZE)	413	#define DATAHDR (sizeof (u32) + RAND_SIZE)
314		414
315	struct vpndata_packet:vpn_packet	415	struct vpndata_packet : vpn_packet
		416	{
		417	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		418
		419	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		420	tap_packet unpack (connection conn, u32 &seqno);
		421
		422	private:
		423	const u32 data_hdr_size () const
316	{	424	{
317	u8 data[MAXVPNDATA + DATAHDR]; // seqno
318
319	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
320	tap_packet unpack (connection conn, u32 &seqno);
321	private:
322
323	const u32 data_hdr_size () const
324	{
325	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	425	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
326	}
327	};	426	}
		427	};
328		428
329	void	429	void
330	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	430	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
331	{	431	{
332	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	432	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
333	int outl = 0, outl2;	433	int outl = 0, outl2;
334	ptype type = PT_DATA_UNCOMPRESSED;	434	ptype type = PT_DATA_UNCOMPRESSED;
335		435
336	#if ENABLE_COMPRESSION	436	#if ENABLE_COMPRESSION
337	u8 cdata[MAX_MTU];	437	u8 cdata[MAX_MTU];
338	u32 cl;
339		438
		439	if (conn->features & FEATURE_COMPRESSION)
		440	{
340	cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	441	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
		442
341	if (cl)	443	if (cl)
342	{	444	{
343	type = PT_DATA_COMPRESSED;	445	type = PT_DATA_COMPRESSED;
344	d = cdata;	446	d = cdata;
345	l = cl + 2;	447	l = cl + 2;
346		448
347	d[0] = cl >> 8;	449	d[0] = cl >> 8;
348	d[1] = cl;	450	d[1] = cl;
		451	}
349	}	452	}
350	#endif	453	#endif
351		454
352	EVP_EncryptInit_ex (cctx, 0, 0, 0, 0);	455	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
353		456
354	struct {	457	struct {
355	#if RAND_SIZE	458	#if RAND_SIZE
356	u8 rnd[RAND_SIZE];	459	u8 rnd[RAND_SIZE];
357	#endif	460	#endif
358	u32 seqno;	461	u32 seqno;
359	} datahdr;	462	} datahdr;
360		463
361	datahdr.seqno = ntohl (seqno);	464	datahdr.seqno = ntohl (seqno);
362	#if RAND_SIZE	465	#if RAND_SIZE
363	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	466	RAND_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);
364	#endif	467	#endif
365		468
366	EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
367	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
368	(unsigned char *) &datahdr, DATAHDR);	471	(unsigned char *) &datahdr, DATAHDR));
369	outl += outl2;	472	outl += outl2;
370		473
371	EVP_EncryptUpdate (cctx,	474	require (EVP_EncryptUpdate (cctx,
372	(unsigned char *) data + outl, &outl2,	475	(unsigned char *) data + outl, &outl2,
373	(unsigned char *) d, l);	476	(unsigned char *) d, l));
374	outl += outl2;	477	outl += outl2;
375		478
376	EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2);	479	require (EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2));
377	outl += outl2;	480	outl += outl2;
378		481
379	len = outl + data_hdr_size ();	482	len = outl + data_hdr_size ();
380		483
381	set_hdr (type, dst);	484	set_hdr (type, dst);
…		…
390	int outl = 0, outl2;	493	int outl = 0, outl2;
391	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
392	u8 *d;	495	u8 *d;
393	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
394		497
395	EVP_DecryptInit_ex (cctx, 0, 0, 0, 0);	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
396		499
397	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
398	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
399		502
400	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
…		…
402	else	505	else
403	#endif	506	#endif
404	d = &(*p)[6 + 6 - DATAHDR];	507	d = &(*p)[6 + 6 - DATAHDR];
405		508
406	/* this overwrites part of the src mac, but we fix that later */	509	/* this overwrites part of the src mac, but we fix that later */
407	EVP_DecryptUpdate (cctx,	510	require (EVP_DecryptUpdate (cctx,
408	d, &outl2,	511	d, &outl2,
409	(unsigned char *)&data, len - data_hdr_size ());	512	(unsigned char *)&data, len - data_hdr_size ()));
410	outl += outl2;	513	outl += outl2;
411		514
412	EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2);	515	require (EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2));
413	outl += outl2;	516	outl += outl2;
414		517
415	seqno = ntohl ((u32 )(d + RAND_SIZE));	518	seqno = ntohl ((u32 )(d + RAND_SIZE));
416		519
417	id2mac (dst () ? dst() : THISNODE->id, p->dst);	520	id2mac (dst () ? dst() : THISNODE->id, p->dst);
…		…
442	}	545	}
443	};	546	};
444		547
445	struct config_packet : vpn_packet	548	struct config_packet : vpn_packet
446	{	549	{
447	// actually, hmaclen cannot be checked because the hmac
448	// field comes before this data, so peers with other
449	// hmacs simply will not work.
450	u8 prot_major, prot_minor, randsize, hmaclen;	550	u8 prot_major, prot_minor, randsize;
451	u8 flags, challengelen, pad2, pad3;	551	u8 flags, features, pad6, pad7, pad8;
452	u32 cipher_nid, digest_nid, hmac_nid;	552	u32 cipher_nid, mac_nid, auth_nid;
453
454	const u8 curflags () const
455	{
456	return 0x80
457	\| (ENABLE_COMPRESSION ? 0x01 : 0x00);
458	}
459		553
460	void setup (ptype type, int dst);	554	void setup (ptype type, int dst);
461	bool chk_config () const;	555	bool chk_config () const;
		556
		557	static u8 get_features ()
		558	{
		559	u8 f = 0;
		560	#if ENABLE_COMPRESSION
		561	f \|= FEATURE_COMPRESSION;
		562	#endif
		563	#if ENABLE_ROHC
		564	f \|= FEATURE_ROHC;
		565	#endif
		566	#if ENABLE_BRIDGING
		567	f \|= FEATURE_BRIDGING;
		568	#endif
		569	return f;
		570	}
462	};	571	};
463		572
		573	void
464	void config_packet::setup (ptype type, int dst)	574	config_packet::setup (ptype type, int dst)
465	{	575	{
466	prot_major = PROTOCOL_MAJOR;	576	prot_major = PROTOCOL_MAJOR;
467	prot_minor = PROTOCOL_MINOR;	577	prot_minor = PROTOCOL_MINOR;
468	randsize = RAND_SIZE;	578	randsize = RAND_SIZE;
469	hmaclen = HMACLENGTH;	579	flags = 0;
470	flags = curflags ();	580	features = get_features ();
471	challengelen = sizeof (rsachallenge);
472		581
473	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	582	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
474	digest_nid = htonl (EVP_MD_type (RSA_HASH));
475	hmac_nid = htonl (EVP_MD_type (DIGEST));	583	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		584	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
476		585
477	len = sizeof (*this) - sizeof (net_packet);	586	len = sizeof (*this) - sizeof (net_packet);
478	set_hdr (type, dst);	587	set_hdr (type, dst);
479	}	588	}
480		589
		590	bool
481	bool config_packet::chk_config () const	591	config_packet::chk_config () const
482	{	592	{
483	if (prot_major != PROTOCOL_MAJOR)	593	if (prot_major != PROTOCOL_MAJOR)
484	slog (L_WARN, _("major version mismatch (%d <=> %d)"), prot_major, PROTOCOL_MAJOR);	594	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
485	else if (randsize != RAND_SIZE)	595	else if (randsize != RAND_SIZE)
486	slog (L_WARN, _("rand size mismatch (%d <=> %d)"), randsize, RAND_SIZE);	596	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
487	else if (hmaclen != HMACLENGTH)
488	slog (L_WARN, _("hmac length mismatch (%d <=> %d)"), hmaclen, HMACLENGTH);
489	else if (flags != curflags ())
490	slog (L_WARN, _("flag mismatch (%x <=> %x)"), flags, curflags ());
491	else if (challengelen != sizeof (rsachallenge))
492	slog (L_WARN, _("challenge length mismatch (%d <=> %d)"), challengelen, sizeof (rsachallenge));
493	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	597	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
494	slog (L_WARN, _("cipher mismatch (%x <=> %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	598	slog (L_WARN, _("cipher algo mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
495	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
496	slog (L_WARN, _("digest mismatch (%x <=> %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
497	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	599	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
498	slog (L_WARN, _("hmac mismatch (%x <=> %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	600	slog (L_WARN, _("mac algo mismatch (remote %x <=> local %x)"), ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		601	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		602	slog (L_WARN, _("auth algo mismatch (remote %x <=> local %x)"), ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
499	else	603	else
500	return true;	604	return true;
501		605
502	return false;	606	return false;
503	}	607	}
504		608
505	struct auth_req_packet : config_packet	609	struct auth_req_packet : config_packet // UNPROTECTED
506	{	610	{
507	char magic[8];	611	char magic[8];
508	u8 initiate; // false if this is just an automatic reply	612	u8 initiate; // false if this is just an automatic reply
509	u8 protocols; // supported protocols (will get patches on forward)	613	u8 protocols; // supported protocols (will be patched on forward)
510	u8 pad2, pad3;	614	u8 pad2, pad3;
511	rsaid id;	615	auth_encr encr;
512	rsaencrdata encr;
513		616
514	auth_req_packet (int dst, bool initiate_, u8 protocols_)	617	auth_req_packet (int dst, bool initiate_, u8 protocols_)
515	{	618	{
516	config_packet::setup (PT_AUTH_REQ, dst);	619	config_packet::setup (PT_AUTH_REQ, dst);
517	strncpy (magic, MAGIC, 8);	620	memcpy (magic, MAGIC, 8);
518	initiate = !!initiate_;	621	initiate = !!initiate_;
519	protocols = protocols_;	622	protocols = protocols_;
520		623
521	len = sizeof (*this) - sizeof (net_packet);	624	len = sizeof (*this) - sizeof (net_packet);
522	}	625	}
523	};	626	};
524		627
525	struct auth_res_packet : config_packet	628	struct auth_res_packet : config_packet // UNPROTECTED
526	{	629	{
527	rsaid id;
528	u8 pad1, pad2, pad3;
529	u8 response_len; // encrypted length
530	rsaresponse response;	630	auth_response response;
531		631
532	auth_res_packet (int dst)	632	auth_res_packet (int dst)
533	{	633	{
534	config_packet::setup (PT_AUTH_RES, dst);	634	config_packet::setup (PT_AUTH_RES, dst);
535		635
…		…
569	};	669	};
570		670
571	/////////////////////////////////////////////////////////////////////////////	671	/////////////////////////////////////////////////////////////////////////////
572		672
573	void	673	void
574	connection::connection_established ()	674	connection::connection_established (const sockinfo &rsi)
575	{	675	{
		676	if (!have_snd_auth \|\| !have_rcv_auth)
		677	return;
		678
		679	si = rsi;
		680	protocol = rsi.prot;
		681
		682	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		683	conf->nodename, (const char *)rsi,
		684	is_direct ? "direct" : "forwarded",
		685	PROTOCOL_MAJOR, prot_minor);
		686
		687	if (::conf.script_node_up)
		688	{
		689	run_script_cb *cb = new run_script_cb;
		690	cb->set<connection, &connection::script_node_up> (this);
		691	run_script_queued (cb, _("node-up command execution failed, continuing."));
		692	}
		693
		694	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		695	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		696
		697	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		698	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		699
576	if (ictx && octx)	700	if (ictx && octx)
577	{	701	{
578	connectmode = conf->connectmode;	702	// make sure rekeying timeouts are slightly asymmetric
		703	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		704	rekey.start (rekey_interval, rekey_interval);
579		705
580	rekey.start (NOW + ::conf.rekey);
581	keepalive.start (NOW + ::conf.keepalive);	706	keepalive.start (::conf.keepalive);
582		707
583	// send queued packets	708	// send queued packets
584	if (ictx && octx)	709	if (ictx && octx)
585	{	710	{
586	while (tap_packet p = (tap_packet )data_queue.get ())	711	while (tap_packet p = (tap_packet )data_queue.get ())
587	{	712	{
588	send_data_packet (p);	713	if (p->len) send_data_packet (p);
589	delete p;	714	delete p;
590	}	715	}
591		716
592	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	717	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
593	{	718	{
594	send_vpn_packet (p, si, IPTOS_RELIABILITY);	719	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
595	delete p;	720	delete p;
596	}	721	}
597	}	722	}
		723
		724	vpn->connection_established (this);
598	}	725	}
		726	#if 0
599	else	727	else
600	{	728	{
601	retry_cnt = 0;	729	retry_cnt = 0;
602	establish_connection.start (NOW + 5);	730	establish_connection.start (5);
603	keepalive.reset ();	731	keepalive.stop ();
604	rekey.reset ();	732	rekey.stop ();
605	}	733	}
		734	#endif
606	}	735	}
607		736
608	void	737	void
609	connection::reset_si ()	738	connection::reset_si ()
610	{	739	{
		740	if (vpn->can_direct (THISNODE, conf))
611	protocol = best_protocol (THISNODE->protocols & conf->protocols);	741	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
612		742	else
613	// mask out protocols we cannot establish	743	{
614	if (!conf->udp_port) protocol &= ~PROT_UDPv4;	744	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
615	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;	745	protocol = 0;
		746	}
616		747
617	si.set (conf, protocol);	748	si.set (conf, protocol);
		749
		750	is_direct = si.valid ();
618	}	751	}
619		752
620	// ensure sockinfo is valid, forward if necessary	753	// ensure sockinfo is valid, forward if necessary
621	const sockinfo &	754	const sockinfo &
622	connection::forward_si (const sockinfo &si) const	755	connection::forward_si (const sockinfo &si) const
623	{	756	{
624	if (!si.valid ())	757	if (!si.valid ())
625	{	758	{
626	connection *r = vpn->find_router ();	759	connection *r = vpn->find_router_for (this);
627		760
628	if (r)	761	if (r)
629	{	762	{
630	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	763	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
631	conf->nodename, r->conf->nodename);	764	conf->nodename, r->conf->nodename);
632	return r->si;	765	return r->si;
633	}	766	}
634	else	767	else
635	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	768	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
636	conf->nodename);	769	conf->nodename);
637	}	770	}
638		771
639	return si;	772	return si;
640	}	773	}
…		…
650	connection::send_ping (const sockinfo &si, u8 pong)	783	connection::send_ping (const sockinfo &si, u8 pong)
651	{	784	{
652	ping_packet *pkt = new ping_packet;	785	ping_packet *pkt = new ping_packet;
653		786
654	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	787	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		788
		789	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
655	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	790	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
656		791
657	delete pkt;	792	delete pkt;
658	}	793	}
659		794
…		…
674	void	809	void
675	connection::send_auth_request (const sockinfo &si, bool initiate)	810	connection::send_auth_request (const sockinfo &si, bool initiate)
676	{	811	{
677	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	812	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
678		813
679	rsachallenge chg;	814	generate_auth_data ();
		815	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
680		816
681	rsa_cache.gen (pkt->id, chg);
682
683	if (0 > RSA_public_encrypt (sizeof chg,
684	(unsigned char )&chg, (unsigned char )&pkt->encr,
685	conf->rsa_key, RSA_PKCS1_OAEP_PADDING))
686	fatal ("RSA_public_encrypt error");
687
688	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	817	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
689
690	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	818	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
691		819
692	delete pkt;	820	delete pkt;
693	}	821	}
694		822
695	void	823	void
696	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	824	connection::send_auth_response (const sockinfo &si)
697	{	825	{
698	auth_res_packet *pkt = new auth_res_packet (conf->id);	826	auth_res_packet *pkt = new auth_res_packet (conf->id);
699		827
700	pkt->id = id;	828	auth_hash (rcv_auth, pkt->response.mac);
		829	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
701		830
702	rsa_hash (id, chg, pkt->response);
703
704	pkt->hmac_set (octx);
705
706	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	831	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
707
708	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	832	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
709		833
710	delete pkt;	834	delete pkt;
711	}	835	}
712		836
713	void	837	void
714	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	838	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
715	{	839	{
716	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	840	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
717	conf->id, rid, (const char *)rsi);	841	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		842	conf->protocols);
718		843
719	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	844	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
720		845
721	r->hmac_set (octx);	846	r->hmac_set (octx);
722	send_vpn_packet (r, si);	847	send_vpn_packet (r, si);
723		848
724	delete r;	849	delete r;
725	}	850	}
726		851
727	void	852	inline void
728	connection::establish_connection_cb (time_watcher &w)	853	connection::establish_connection_cb (ev::timer &w, int revents)
729	{	854	{
730	if (ictx \|\| conf == THISNODE	855	if (!(ictx && octx)
		856	&& conf != THISNODE
731	\|\| connectmode == conf_node::C_NEVER	857	&& connectmode != conf_node::C_NEVER
732	\|\| connectmode == conf_node::C_DISABLED)	858	&& connectmode != conf_node::C_DISABLED
733	w.at = TSTAMP_CANCEL;	859	&& !w.is_active ())
734	else if (w.at <= NOW)
735	{	860	{
736	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	861	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
737		862	// and stop trying. should probably be handled by a per-connection expire handler.
738	if (retry_int < 3600 * 8)	863	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		864	{
		865	reset_connection ();
739	retry_cnt++;	866	return;
		867	}
740		868
741	w.at = NOW + retry_int;	869	last_establish_attempt = ev_now ();
		870
		871	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		872	? (retry_cnt & 3) + 1
		873	: 1 << (retry_cnt >> 2));
742		874
743	reset_si ();	875	reset_si ();
744		876
745	if (si.prot && !si.host)	877	bool slow = si.prot & PROT_SLOW;
		878
		879	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		880	{
		881	/TODO/ /* start the timer so we don't recurse endlessly */
		882	w.start (1);
746	vpn->send_connect_request (conf->id);	883	vpn->send_connect_request (this);
		884	}
747	else	885	else
748	{	886	{
		887	if (si.valid ())
		888	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		889	conf->nodename, (const char *)si);
		890
749	const sockinfo &dsi = forward_si (si);	891	const sockinfo &dsi = forward_si (si);
		892
		893	slow = slow \|\| (dsi.prot & PROT_SLOW);
750		894
751	if (dsi.valid () && auth_rate_limiter.can (dsi))	895	if (dsi.valid () && auth_rate_limiter.can (dsi))
752	{	896	{
753	if (retry_cnt < 4)	897	if (retry_cnt < 4)
754	send_auth_request (dsi, true);	898	send_auth_request (dsi, true);
755	else	899	else
756	send_ping (dsi, 0);	900	send_ping (dsi, 0);
757	}	901	}
758	}	902	}
		903
		904	retry_int *= slow ? 8. : 0.9;
		905
		906	if (retry_int < conf->max_retry)
		907	retry_cnt++;
		908	else
		909	retry_int = conf->max_retry;
		910
		911	w.start (retry_int);
759	}	912	}
760	}	913	}
761		914
762	void	915	void
763	connection::reset_connection ()	916	connection::reset_connection ()
…		…
766	{	919	{
767	slog (L_INFO, _("%s(%s): connection lost"),	920	slog (L_INFO, _("%s(%s): connection lost"),
768	conf->nodename, (const char *)si);	921	conf->nodename, (const char *)si);
769		922
770	if (::conf.script_node_down)	923	if (::conf.script_node_down)
771	run_script (run_script_cb (this, &connection::script_node_down), false);	924	{
		925	run_script_cb *cb = new run_script_cb;
		926	cb->set<connection, &connection::script_node_down> (this);
		927	run_script_queued (cb, _("node-down command execution failed, continuing."));
		928	}
772	}	929	}
773		930
774	delete ictx; ictx = 0;	931	delete ictx; ictx = 0;
775	delete octx; octx = 0;	932	delete octx; octx = 0;
776		933
777	si.host= 0;	934	si.host = 0;
778		935
		936	have_snd_auth = false;
		937	have_rcv_auth = false;
		938	auth_expire = 0.;
		939
779	last_activity = 0;	940	last_activity = 0.;
		941	//last_si_change = 0.;
780	retry_cnt = 0;	942	retry_cnt = 0;
781		943
782	rekey.reset ();	944	rekey.stop ();
783	keepalive.reset ();	945	keepalive.stop ();
784	establish_connection.reset ();	946	establish_connection.stop ();
785	}	947	}
786		948
787	void	949	void
788	connection::shutdown ()	950	connection::shutdown ()
789	{	951	{
…		…
791	send_reset (si);	953	send_reset (si);
792		954
793	reset_connection ();	955	reset_connection ();
794	}	956	}
795		957
796	void	958	// poor-man's rekeying
797	connection::rekey_cb (time_watcher &w)	959	inline void
		960	connection::rekey_cb (ev::timer &w, int revents)
798	{	961	{
799	w.at = TSTAMP_CANCEL;
800
801	reset_connection ();	962	reset_connection ();
802	establish_connection ();	963	establish_connection ();
803	}	964	}
804		965
805	void	966	void
…		…
820	if (oseqno > MAX_SEQNO)	981	if (oseqno > MAX_SEQNO)
821	rekey ();	982	rekey ();
822	}	983	}
823		984
824	void	985	void
		986	connection::post_inject_queue ()
		987	{
		988	// force a connection every now and when when packets are sent (max 1/s)
		989	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		990	establish_connection.stop ();
		991
		992	establish_connection ();
		993	}
		994
		995	void
825	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	996	connection::inject_data_packet (tap_packet *pkt)
826	{	997	{
827	if (ictx && octx)	998	if (ictx && octx)
828	send_data_packet (pkt);	999	send_data_packet (pkt);
829	else	1000	else
830	{	1001	{
831	if (!broadcast)//DDDD
832	data_queue.put (new tap_packet (*pkt));	1002	data_queue.put (new tap_packet (*pkt));
833		1003	post_inject_queue ();
834	establish_connection ();
835	}	1004	}
836	}	1005	}
837		1006
		1007	void
838	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1008	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
839	{	1009	{
840	if (ictx && octx)	1010	if (ictx && octx)
841	send_vpn_packet (pkt, si, tos);	1011	send_vpn_packet (pkt, si, tos);
842	else	1012	else
843	{	1013	{
844	vpn_queue.put (new vpn_packet (*pkt));	1014	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
845		1015	post_inject_queue ();
846	establish_connection ();
847	}	1016	}
848	}	1017	}
849		1018
850	void	1019	void
851	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1020	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
852	{	1021	{
853	last_activity = NOW;	1022	last_activity = ev_now ();
854		1023
855	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1024	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
856	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1025	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1026
		1027	if (connectmode == conf_node::C_DISABLED)
		1028	return;
857		1029
858	switch (pkt->typ ())	1030	switch (pkt->typ ())
859	{	1031	{
860	case vpn_packet::PT_PING:	1032	case vpn_packet::PT_PING:
		1033	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1034
861	// we send pings instead of auth packets after some retries,	1035	// we send pings instead of auth packets after some retries,
862	// so reset the retry counter and establish a connection	1036	// so reset the retry counter and establish a connection
863	// when we receive a ping.	1037	// when we receive a ping.
864	if (!ictx)	1038	if (!ictx)
865	{	1039	{
866	if (auth_rate_limiter.can (rsi))	1040	if (auth_rate_limiter.can (rsi))
867	send_auth_request (rsi, true);	1041	send_auth_request (rsi, true);
868	}	1042	}
869	else	1043	else
		1044	// we would love to change the socket address here, but ping's aren't
		1045	// authenticated, so we best ignore it.
870	send_ping (rsi, 1); // pong	1046	send_ping (rsi, 1); // pong
871		1047
872	break;	1048	break;
873		1049
874	case vpn_packet::PT_PONG:	1050	case vpn_packet::PT_PONG:
		1051	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1052
		1053	// a PONG might mean that the other side doesn't really know
		1054	// about our desire for communication.
		1055	establish_connection ();
875	break;	1056	break;
876		1057
877	case vpn_packet::PT_RESET:	1058	case vpn_packet::PT_RESET:
878	{	1059	{
879	reset_connection ();	1060	reset_connection ();
880		1061
881	config_packet p = (config_packet ) pkt;	1062	config_packet p = (config_packet ) pkt;
882		1063
883	if (!p->chk_config ())	1064	if (!p->chk_config ())
884	{	1065	{
885	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1066	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
886	conf->nodename, (const char *)rsi);	1067	conf->nodename, (const char *)rsi);
887	connectmode = conf_node::C_DISABLED;	1068	connectmode = conf_node::C_DISABLED;
888	}	1069	}
889	else if (connectmode == conf_node::C_ALWAYS)	1070	else if (connectmode == conf_node::C_ALWAYS)
890	establish_connection ();	1071	establish_connection ();
…		…
892	break;	1073	break;
893		1074
894	case vpn_packet::PT_AUTH_REQ:	1075	case vpn_packet::PT_AUTH_REQ:
895	if (auth_rate_limiter.can (rsi))	1076	if (auth_rate_limiter.can (rsi))
896	{	1077	{
897	auth_req_packet p = (auth_req_packet ) pkt;	1078	auth_req_packet p = (auth_req_packet )pkt;
898		1079
899	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1080	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1081	conf->nodename, p->initiate ? "initiate" : "reply",
		1082	p->protocols, p->features);
900		1083
901	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1084	if (p->chk_config () && !memcmp (p->magic, MAGIC, 8))
902	{	1085	{
903	if (p->prot_minor != PROTOCOL_MINOR)	1086	if (p->prot_minor != PROTOCOL_MINOR)
904	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1087	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
905	conf->nodename, (const char *)rsi,	1088	conf->nodename, (const char *)rsi,
906	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1089	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
907		1090
908	if (p->initiate)	1091	if (p->initiate)
909	send_auth_request (rsi, false);	1092	send_auth_request (rsi, false);
910		1093
911	rsachallenge k;	1094	auth_data auth;
912		1095
913	if (0 > RSA_private_decrypt (sizeof (p->encr),	1096	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
914	(unsigned char )&p->encr, (unsigned char )&k,	1097	{
915	::conf.rsa_key, RSA_PKCS1_OAEP_PADDING))
916	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1098	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
917	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1099	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
		1100	}
918	else	1101	else
919	{	1102	{
920	delete octx;	1103	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
921		1104
922	octx = new crypto_ctx (k, 1);	1105	rcv_auth = auth;
923	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1106	have_rcv_auth = true;
924		1107
		1108	send_auth_response (rsi);
		1109
		1110	if (chg)
		1111	{
925	conf->protocols = p->protocols;	1112	conf->protocols = p->protocols;
		1113	features = p->features & config_packet::get_features ();
926		1114
927	send_auth_response (rsi, p->id, k);
928
929	connection_established ();	1115	connection_established (rsi);
930
931	break;	1116	}
932	}	1117	}
		1118
		1119	break;
933	}	1120	}
934	else	1121	else
935	slog (L_WARN, _("%s(%s): protocol mismatch"),	1122	slog (L_WARN, _("%s(%s): protocol mismatch."),
936	conf->nodename, (const char *)rsi);	1123	conf->nodename, (const char *)rsi);
937		1124
938	send_reset (rsi);	1125	send_reset (rsi);
939	}	1126	}
940		1127
941	break;	1128	break;
942		1129
943	case vpn_packet::PT_AUTH_RES:	1130	case vpn_packet::PT_AUTH_RES:
944	{	1131	{
945	auth_res_packet p = (auth_res_packet ) pkt;	1132	auth_res_packet p = (auth_res_packet )pkt;
946		1133
947	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1134	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
948		1135
949	if (p->chk_config ())	1136	if (p->chk_config ())
950	{	1137	{
951	if (p->prot_minor != PROTOCOL_MINOR)	1138	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
952	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
953	conf->nodename, (const char *)rsi,
954	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
955
956	rsachallenge chg;
957
958	if (!rsa_cache.find (p->id, chg))
959	{	1139	{
960	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1140	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
961	conf->nodename, (const char *)rsi);	1141	conf->nodename, (const char *)rsi);
962	break;
963	}	1142	}
964	else	1143	else if (!have_snd_auth)
965	{	1144	{
966	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1145	if (p->prot_minor != PROTOCOL_MINOR)
967		1146	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
968	if (!p->hmac_chk (cctx))
969	{
970	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
971	"could be an attack, or just corruption or an synchronization error"),
972	conf->nodename, (const char *)rsi);	1147	conf->nodename, (const char *)rsi,
973	break;	1148	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
974	}
975	else
976	{
977	rsaresponse h;
978		1149
979	rsa_hash (p->id, chg, h);
980
981	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
982	{
983	prot_minor = p->prot_minor;	1150	prot_minor = p->prot_minor;
		1151	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
984		1152
985	delete ictx; ictx = cctx;	1153	have_snd_auth = true;
986
987	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
988
989	si = rsi;
990	protocol = rsi.prot;
991
992	connection_established ();	1154	connection_established (rsi);
993
994	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
995	conf->nodename, (const char *)rsi,
996	p->prot_major, p->prot_minor);
997
998	if (::conf.script_node_up)
999	run_script (run_script_cb (this, &connection::script_node_up), false);
1000
1001	break;
1002	}
1003	else
1004	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1005	conf->nodename, (const char *)rsi);
1006	}
1007
1008	delete cctx;
1009	}	1155	}
		1156
		1157	break;
1010	}	1158	}
1011	}	1159	}
1012		1160
1013	send_reset (rsi);	1161	send_reset (rsi);
1014	break;	1162	break;
…		…
1025	{	1173	{
1026	vpndata_packet p = (vpndata_packet )pkt;	1174	vpndata_packet p = (vpndata_packet )pkt;
1027		1175
1028	if (!p->hmac_chk (ictx))	1176	if (!p->hmac_chk (ictx))
1029	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1177	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1030	"could be an attack, or just corruption or an synchronization error"),	1178	"could be an attack, or just corruption or a synchronization error."),
1031	conf->nodename, (const char *)rsi);	1179	conf->nodename, (const char *)rsi);
1032	else	1180	else
1033	{	1181	{
1034	u32 seqno;	1182	u32 seqno;
1035	tap_packet *d = p->unpack (this, seqno);	1183	tap_packet *d = p->unpack (this, seqno);
		1184	int seqclass = iseqno.seqno_classify (seqno);
1036		1185
1037	if (iseqno.recv_ok (seqno))	1186	if (seqclass == 0) // ok
1038	{	1187	{
1039	vpn->tap->send (d);	1188	vpn->tap->send (d);
1040		1189
1041	if (si != rsi)	1190	if (si != rsi)
1042	{	1191	{
1043	// fast re-sync on connection changes, useful especially for tcp/ip	1192	// fast re-sync on source address changes, useful especially for tcp/ip
		1193	//if (last_si_change < ev_now () + 5.)
1044	si = rsi;	1194	// {
1045
1046	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1195	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1047	conf->nodename, (const char )si, (const char )rsi);	1196	conf->nodename, (const char )si, (const char )rsi);
		1197
		1198	si = rsi;
		1199
		1200	if (::conf.script_node_change)
		1201	{
		1202	run_script_cb *cb = new run_script_cb;
		1203	cb->set<connection, &connection::script_node_change> (this);
		1204	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1205	}
		1206
		1207	// }
		1208	//else
		1209	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1210	// conf->nodename, (const char )si, (const char )rsi);
1048	}	1211	}
1049
1050	delete d;
1051
1052	break;
1053	}	1212	}
		1213	else if (seqclass == 1) // far history
		1214	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1215	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1216	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1217	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1218	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1219	else if (seqclass == 3) // reset
		1220	{
		1221	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1222	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1223	send_reset (rsi);
		1224	}
		1225
		1226	delete d;
		1227	break;
1054	}	1228	}
1055	}	1229	}
1056		1230
1057	send_reset (rsi);	1231	send_reset (rsi);
1058	break;	1232	break;
1059		1233
1060	case vpn_packet::PT_CONNECT_REQ:	1234	case vpn_packet::PT_CONNECT_REQ:
1061	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1235	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1062	{	1236	{
1063	connect_req_packet p = (connect_req_packet ) pkt;	1237	connect_req_packet p = (connect_req_packet )pkt;
1064		1238
1065	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1239	if (p->id > 0 && p->id <= vpn->conns.size ())
1066	connection *c = vpn->conns[p->id - 1];
1067	conf->protocols = p->protocols;
1068
1069	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1070	conf->id, p->id, c->ictx && c->octx);
1071
1072	if (c->ictx && c->octx)
1073	{	1240	{
		1241	connection *c = vpn->conns[p->id - 1];
		1242	conf->protocols = p->protocols;
		1243
		1244	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1245	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1246	p->protocols,
		1247	c->ictx && c->octx);
		1248
		1249	if (c->ictx && c->octx)
		1250	{
1074	// send connect_info packets to both sides, in case one is	1251	// send connect_info packets to both sides, in case one is
1075	// behind a nat firewall (or both ;)	1252	// behind a nat firewall (or both ;)
1076	c->send_connect_info (conf->id, si, conf->protocols);	1253	c->send_connect_info (conf->id, si, conf->protocols);
1077	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1254	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1255	}
		1256	else
		1257	c->establish_connection ();
1078	}	1258	}
1079	else	1259	else
1080	c->establish_connection ();	1260	slog (L_WARN,
		1261	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1262	p->id);
1081	}	1263	}
1082		1264
1083	break;	1265	break;
1084		1266
1085	case vpn_packet::PT_CONNECT_INFO:	1267	case vpn_packet::PT_CONNECT_INFO:
1086	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1268	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1087	{	1269	{
1088	connect_info_packet p = (connect_info_packet ) pkt;	1270	connect_info_packet p = (connect_info_packet )pkt;
1089		1271
1090	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1272	if (p->id > 0 && p->id <= vpn->conns.size ())
1091		1273	{
1092	connection *c = vpn->conns[p->id - 1];	1274	connection *c = vpn->conns[p->id - 1];
1093		1275
1094	c->conf->protocols = p->protocols;	1276	c->conf->protocols = p->protocols;
1095	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1277	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1096	p->si.upgrade_protocol (protocol, c->conf);	1278	p->si.upgrade_protocol (protocol, c->conf);
1097		1279
1098	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1280	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1099	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1281	conf->nodename,
		1282	vpn->conns[p->id - 1]->conf->nodename,
		1283	(const char *)p->si,
		1284	p->protocols,
		1285	protocol,
		1286	p->si.supported_protocols (c->conf),
		1287	!c->ictx && !c->octx);
1100		1288
1101	const sockinfo &dsi = forward_si (p->si);	1289	const sockinfo &dsi = forward_si (p->si);
1102		1290
1103	if (dsi.valid ())	1291	if (dsi.valid ())
1104	c->send_auth_request (dsi, true);	1292	c->send_auth_request (dsi, true);
		1293	else
		1294	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1295	vpn->conns[p->id - 1]->conf->nodename,
		1296	(const char *)p->si);
		1297	}
		1298	else
		1299	slog (L_WARN,
		1300	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1301	p->id);
1105	}	1302	}
1106		1303
1107	break;	1304	break;
1108		1305
1109	default:	1306	default:
1110	send_reset (rsi);	1307	send_reset (rsi);
1111	break;	1308	break;
1112	}	1309	}
1113	}	1310	}
1114		1311
1115	void connection::keepalive_cb (time_watcher &w)	1312	inline void
		1313	connection::keepalive_cb (ev::timer &w, int revents)
1116	{	1314	{
1117	if (NOW >= last_activity + ::conf.keepalive + 30)	1315	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1316
		1317	if (when >= 0)
		1318	w.start (when);
		1319	else if (when < -15)
1118	{	1320	{
1119	reset_connection ();	1321	reset_connection ();
1120	establish_connection ();	1322	establish_connection ();
1121	}	1323	}
1122	else if (NOW < last_activity + ::conf.keepalive)
1123	w.at = last_activity + ::conf.keepalive;
1124	else if (conf->connectmode != conf_node::C_ONDEMAND	1324	else if (conf->connectmode != conf_node::C_ONDEMAND
1125	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1325	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1126	{	1326	{
		1327	w.start (3);
1127	send_ping (si);	1328	send_ping (si);
1128	w.at = NOW + 5;
1129	}	1329	}
1130	else if (NOW < last_activity + ::conf.keepalive + 10)	1330	else if (when >= -10)
1131	// hold ondemand connections implicitly a few seconds longer	1331	// hold ondemand connections implicitly a few seconds longer
1132	// should delete octx, though, or something like that ;)	1332	// should delete octx, though, or something like that ;)
1133	w.at = last_activity + ::conf.keepalive + 10;	1333	w.start (when + 10);
1134	else	1334	else
1135	reset_connection ();	1335	reset_connection ();
1136	}	1336	}
1137		1337
		1338	void
1138	void connection::send_connect_request (int id)	1339	connection::send_connect_request (int id)
1139	{	1340	{
1140	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1341	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1141		1342
1142	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1343	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1344	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1345	THISNODE->protocols);
1143	p->hmac_set (octx);	1346	p->hmac_set (octx);
1144	send_vpn_packet (p, si);	1347	send_vpn_packet (p, si);
1145		1348
1146	delete p;	1349	delete p;
1147	}	1350	}
1148		1351
1149	void connection::script_node ()	1352	void
		1353	connection::script_init_env (const char *ext)
1150	{	1354	{
1151	vpn->script_if_up ();
1152
1153	char *env;	1355	char *env;
		1356	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1357	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1358	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1359	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1360	conf->id & 0xff); putenv (env);
		1361	}
		1362
		1363	void
		1364	connection::script_init_connect_env ()
		1365	{
		1366	vpn->script_init_env ();
		1367
		1368	char *env;
1154	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1369	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1370	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1155	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1371	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1156	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1372	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1157	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1373	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1158	}	1374	}
1159		1375
		1376	inline const char *
1160	const char *connection::script_node_up ()	1377	connection::script_node_up ()
1161	{	1378	{
1162	script_node ();	1379	script_init_connect_env ();
1163		1380
1164	putenv ("STATE=up");	1381	putenv ((char *)"STATE=up");
1165		1382
		1383	char *filename;
		1384	asprintf (&filename,
		1385	"%s/%s",
		1386	confbase,
1166	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1387	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1167	}
1168		1388
		1389	return filename;
		1390	}
		1391
		1392	inline const char *
		1393	connection::script_node_change ()
		1394	{
		1395	script_init_connect_env ();
		1396
		1397	putenv ((char *)"STATE=change");
		1398
		1399	char *filename;
		1400	asprintf (&filename,
		1401	"%s/%s",
		1402	confbase,
		1403	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1404
		1405	return filename;
		1406	}
		1407
		1408	inline const char *
1169	const char *connection::script_node_down ()	1409	connection::script_node_down ()
1170	{	1410	{
1171	script_node ();	1411	script_init_connect_env ();
1172		1412
1173	putenv ("STATE=down");	1413	putenv ((char *)"STATE=down");
1174		1414
1175	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1415	char *filename;
1176	}	1416	asprintf (&filename,
		1417	"%s/%s",
		1418	confbase,
		1419	::conf.script_node_down ? ::conf.script_node_down : "node-down");
1177		1420
		1421	return filename;
		1422	}
		1423
1178	connection::connection(struct vpn *vpn_)	1424	connection::connection (struct vpn vpn, conf_node conf)
1179	: vpn(vpn_)	1425	: vpn(vpn), conf(conf),
1180	, rekey (this, &connection::rekey_cb)	1426	#if ENABLE_DNS
1181	, keepalive (this, &connection::keepalive_cb)	1427	dns (0),
		1428	#endif
		1429	data_queue(conf->max_ttl, conf->max_queue + 1),
		1430	vpn_queue(conf->max_ttl, conf->max_queue + 1)
		1431	{
		1432	rekey .set<connection, &connection::rekey_cb > (this);
		1433	keepalive .set<connection, &connection::keepalive_cb > (this);
1182	, establish_connection (this, &connection::establish_connection_cb)	1434	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1183	{	1435
		1436	last_establish_attempt = 0.;
1184	octx = ictx = 0;	1437	octx = ictx = 0;
1185	retry_cnt = 0;
1186		1438
1187	connectmode = conf_node::C_ALWAYS; // initial setting	1439	connectmode = conf->connectmode;
		1440
		1441	// queue a dummy packet to force an initial connection attempt
		1442	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1443	vpn_queue.put (new net_packet);
		1444
1188	reset_connection ();	1445	reset_connection ();
1189	}	1446	}
1190		1447
1191	connection::~connection ()	1448	connection::~connection ()
1192	{	1449	{
1193	shutdown ();	1450	shutdown ();
1194	}	1451	}
1195		1452
		1453	void
1196	void connection_init ()	1454	connection_init ()
1197	{	1455	{
1198	auth_rate_limiter.clear ();	1456	auth_rate_limiter.clear ();
1199	reset_rate_limiter.clear ();	1457	reset_rate_limiter.clear ();
1200	}	1458	}
1201		1459

Diff Legend

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

Comparing gvpe/src/connection.C (file contents): Revision 1.22 by pcg, Thu Oct 16 02:41:21 2003 UTC vs. Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC

Diff Legend

Comparing gvpe/src/connection.C (file contents):
Revision 1.22 by pcg, Thu Oct 16 02:41:21 2003 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC