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

Comparing gvpe/src/connection.C (file contents):
Revision 1.23 by pcg, Wed Oct 22 00:42:53 2003 UTC vs.
Revision 1.102 by root, Thu Jul 18 13:35:16 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	#define MAGIC "HUHN\xbd\xc6\xdb\x82" // 8 bytes of magic//D
		54
		55	#define ULTRA_FAST 1
		56	#define HLOG 15
		57	#include "lzf/lzf.h"
		58	#include "lzf/lzf_c.c"
		59	#include "lzf/lzf_d.c"
		60
		61	//////////////////////////////////////////////////////////////////////////////
		62
		63	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		64	static ev::child rs_child_ev;
		65
		66	namespace
		67	{
		68	void // c++ requires external linkage here, apparently :(
		69	rs_child_cb (ev::child &w, int revents)
		70	{
		71	w.stop ();
		72
		73	if (rs_queue.empty ())
		74	return;
		75
		76	pid_t pid = run_script (*rs_queue.front ().first, false);
		77	if (pid)
		78	{
		79	w.set (pid);
		80	w.start ();
		81	}
		82	else
		83	slog (L_WARN, rs_queue.front ().second);
		84
		85	delete rs_queue.front ().first;
		86	rs_queue.pop ();
		87	}
		88	};
		89
		90	// despite the fancy name, this is quite a hack
		91	static void
		92	run_script_queued (run_script_cb cb, const char warnmsg)
		93	{
		94	rs_queue.push (std::make_pair (cb, warnmsg));
		95
		96	if (!rs_child_ev.is_active ())
		97	{
		98	rs_child_ev.set<rs_child_cb> ();
		99	rs_child_ev ();
		100	}
		101	}
		102
		103	//////////////////////////////////////////////////////////////////////////////
48		104
49	struct crypto_ctx	105	struct crypto_ctx
50	{	106	{
51	EVP_CIPHER_CTX cctx;	107	EVP_CIPHER_CTX cctx;
52	HMAC_CTX hctx;	108	HMAC_CTX hctx;
53		109
54	crypto_ctx (const rsachallenge &challenge, int enc);	110	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
55	~crypto_ctx ();	111	~crypto_ctx ();
56	};	112	};
57		113
58	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	114	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
59	{	115	{
		116	ecdh_key s;
		117
		118	curve25519_combine (a, b, s);
		119
		120	{
		121	u8 mac_key[MAC_KEYSIZE];
		122	static const unsigned char mac_info[] = "gvpe mac key";
		123
		124	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		125	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		126	kdf.extract (s, sizeof (s));
		127	kdf.extract_done (HKDF_PRF_HASH ());
		128	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		129
		130	HMAC_CTX_init (&hctx);
		131	require (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		132	}
		133
		134	{
		135	u8 cipher_key[CIPHER_KEYSIZE];
		136	static const unsigned char cipher_info[] = "gvpe cipher key";
		137
		138	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		139	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		140	kdf.extract (s, sizeof (s));
		141	kdf.extract_done (HKDF_PRF_HASH ());
		142	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		143
60	EVP_CIPHER_CTX_init (&cctx);	144	EVP_CIPHER_CTX_init (&cctx);
61	EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc);	145	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
62	HMAC_CTX_init (&hctx);	146	}
63	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
64	}	147	}
65		148
66	crypto_ctx::~crypto_ctx ()	149	crypto_ctx::~crypto_ctx ()
67	{	150	{
68	EVP_CIPHER_CTX_cleanup (&cctx);	151	require (EVP_CIPHER_CTX_cleanup (&cctx));
69	HMAC_CTX_cleanup (&hctx);	152	HMAC_CTX_cleanup (&hctx);
70	}	153	}
71		154
		155	static inline void
		156	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		157	{
		158	if (RSA_public_encrypt (sizeof (auth.rsa),
		159	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		160	key, RSA_PKCS1_OAEP_PADDING) < 0)
		161	fatal ("RSA_public_encrypt error");
		162
		163	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		164	}
		165
		166	static inline bool
		167	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		168	{
		169	u8 rsa_decrypt[RSA_KEYLEN];
		170
		171	if (RSA_private_decrypt (sizeof (encr.rsa),
		172	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		173	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		174	return 0;
		175
		176	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		177	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		178
		179	return 1;
		180	}
		181
72	static void	182	static void
73	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	183	auth_hash (const auth_data &auth, auth_mac &mac)
74	{	184	{
75	EVP_MD_CTX ctx;	185	HMAC_CTX ctx;
76		186
77	EVP_MD_CTX_init (&ctx);	187	HMAC_CTX_init (&ctx);
78	EVP_DigestInit (&ctx, RSA_HASH);	188	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
79	EVP_DigestUpdate(&ctx, &chg, sizeof chg);	189	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
80	EVP_DigestUpdate(&ctx, &id, sizeof id);	190	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
81	EVP_DigestFinal (&ctx, (unsigned char *)&h, 0);
82	EVP_MD_CTX_cleanup (&ctx);	191	HMAC_CTX_cleanup (&ctx);
83	}	192	}
84		193
85	struct rsa_entry {	194	void
86	tstamp expire;	195	connection::generate_auth_data ()
87	rsaid id;
88	rsachallenge chg;
89	};
90
91	struct rsa_cache : list<rsa_entry>
92	{	196	{
93	void cleaner_cb (time_watcher &w); time_watcher cleaner;	197	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	{ }	198	{
		199	// request data
		200	rand_fill (snd_auth.rsa);
		201	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
		202	auth_hash (snd_auth, snd_auth_mac);
134		203
135	} rsa_cache;	204	// eventual response data
136		205	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	{	206	}
143	w.at = NOW + RSA_TTL;
144		207
145	for (iterator i = begin (); i != end (); )	208	// every use prolongs the expiry
146	if (i->expire <= NOW)	209	auth_expire = ev_now () + AUTH_TTL;
147	i = erase (i);
148	else
149	++i;
150	}
151	}	210	}
152		211
153	//////////////////////////////////////////////////////////////////////////////	212	//////////////////////////////////////////////////////////////////////////////
154		213
155	void pkt_queue::put (net_packet *p)	214	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		215	: max_ttl (max_ttl), max_queue (max_queue)
156	{	216	{
157	if (queue[i])	217	queue = new pkt [max_queue];
158	{
159	delete queue[i];
160	j = (j + 1) % QUEUEDEPTH;
161	}
162		218
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;	219	i = 0;
185	j = 0;	220	j = 0;
		221
		222	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
186	}	223	}
187		224
188	pkt_queue::~pkt_queue ()	225	pkt_queue::~pkt_queue ()
189	{	226	{
190	for (i = QUEUEDEPTH; --i > 0; )	227	while (net_packet *p = get ())
		228	delete p;
		229
191	delete queue[i];	230	delete [] queue;
192	}	231	}
193		232
		233	void
		234	pkt_queue::expire_cb (ev::timer &w, int revents)
		235	{
		236	ev_tstamp expire = ev_now () - max_ttl;
		237
		238	for (;;)
		239	{
		240	if (empty ())
		241	break;
		242
		243	double diff = queue[j].tstamp - expire;
		244
		245	if (diff >= 0.)
		246	{
		247	w.start (diff > 0.5 ? diff : 0.5);
		248	break;
		249	}
		250
		251	delete get ();
		252	}
		253	}
		254
		255	void
		256	pkt_queue::put (net_packet *p)
		257	{
		258	ev_tstamp now = ev_now ();
		259
		260	// start expiry timer
		261	if (empty ())
		262	expire.start (max_ttl);
		263
		264	int ni = i + 1 == max_queue ? 0 : i + 1;
		265
		266	if (ni == j)
		267	delete get ();
		268
		269	queue[i].pkt = p;
		270	queue[i].tstamp = now;
		271
		272	i = ni;
		273	}
		274
		275	net_packet *
		276	pkt_queue::get ()
		277	{
		278	if (empty ())
		279	return 0;
		280
		281	net_packet *p = queue[j].pkt;
		282	queue[j].pkt = 0;
		283
		284	j = j + 1 == max_queue ? 0 : j + 1;
		285
		286	return p;
		287	}
		288
194	struct net_rateinfo {	289	struct net_rateinfo
		290	{
195	u32 host;	291	u32 host;
196	double pcnt, diff;	292	double pcnt, diff;
197	tstamp last;	293	tstamp last;
198	};	294	};
199		295
200	// only do action once every x seconds per host whole allowing bursts.	296	// only do action once every x seconds per host whole allowing bursts.
201	// this implementation ("splay list" ;) is inefficient,	297	// this implementation ("splay list" ;) is inefficient,
202	// but low on resources.	298	// but low on resources.
203	struct net_rate_limiter : list<net_rateinfo>	299	struct net_rate_limiter : list<net_rateinfo>
204	{	300	{
205	static const double ALPHA = 1. - 1. / 600.; // allow bursts	301	# define NRL_ALPHA (1. - 1. / 600.) // allow bursts
206	static const double CUTOFF = 10.; // one event every CUTOFF seconds	302	# define NRL_CUTOFF 10. // one event every CUTOFF seconds
207	static const double EXPIRE = CUTOFF * 30.; // expire entries after this time	303	# define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time
208	static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value	304	# define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value
209		305
210	bool can (const sockinfo &si) { return can((u32)si.host); }	306	bool can (const sockinfo &si) { return can((u32)si.host); }
211	bool can (u32 host);	307	bool can (u32 host);
212	};	308	};
213		309
214	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	310	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
215		311
		312	bool
216	bool net_rate_limiter::can (u32 host)	313	net_rate_limiter::can (u32 host)
217	{	314	{
218	iterator i;	315	iterator i;
219		316
220	for (i = begin (); i != end (); )	317	for (i = begin (); i != end (); )
221	if (i->host == host)	318	if (i->host == host)
222	break;	319	break;
223	else if (i->last < NOW - EXPIRE)	320	else if (i->last < ev_now () - NRL_EXPIRE)
224	i = erase (i);	321	i = erase (i);
225	else	322	else
226	i++;	323	i++;
227		324
228	if (i == end ())	325	if (i == end ())
229	{	326	{
230	net_rateinfo ri;	327	net_rateinfo ri;
231		328
232	ri.host = host;	329	ri.host = host;
233	ri.pcnt = 1.;	330	ri.pcnt = 1.;
234	ri.diff = MAXDIF;	331	ri.diff = NRL_MAXDIF;
235	ri.last = NOW;	332	ri.last = ev_now ();
236		333
237	push_front (ri);	334	push_front (ri);
238		335
239	return true;	336	return true;
240	}	337	}
241	else	338	else
242	{	339	{
243	net_rateinfo ri (*i);	340	net_rateinfo ri (*i);
244	erase (i);	341	erase (i);
245		342
246	ri.pcnt = ri.pcnt * ALPHA;	343	ri.pcnt = ri.pcnt * NRL_ALPHA;
247	ri.diff = ri.diff * ALPHA + (NOW - ri.last);	344	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
248		345
249	ri.last = NOW;	346	ri.last = ev_now ();
250		347
251	double dif = ri.diff / ri.pcnt;	348	double dif = ri.diff / ri.pcnt;
252		349
253	bool send = dif > CUTOFF;	350	bool send = dif > NRL_CUTOFF;
254		351
255	if (dif > MAXDIF)	352	if (dif > NRL_MAXDIF)
256	{	353	{
257	ri.pcnt = 1.;	354	ri.pcnt = 1.;
258	ri.diff = MAXDIF;	355	ri.diff = NRL_MAXDIF;
259	}	356	}
260	else if (send)	357	else if (send)
261	ri.pcnt++;	358	ri.pcnt++;
262		359
263	push_front (ri);	360	push_front (ri);
268		365
269	/////////////////////////////////////////////////////////////////////////////	366	/////////////////////////////////////////////////////////////////////////////
270		367
271	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	368	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
272		369
		370	void
273	void hmac_packet::hmac_gen (crypto_ctx *ctx)	371	hmac_packet::hmac_gen (crypto_ctx *ctx)
274	{	372	{
275	unsigned int xlen;	373	unsigned int xlen;
276		374
277	HMAC_CTX *hctx = &ctx->hctx;	375	HMAC_CTX *hctx = &ctx->hctx;
278		376
279	HMAC_Init_ex (hctx, 0, 0, 0, 0);	377	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
280	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	378	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
281	len - sizeof (hmac_packet));	379	len - sizeof (hmac_packet)));
282	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	380	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
283	}	381	}
284		382
285	void	383	void
286	hmac_packet::hmac_set (crypto_ctx *ctx)	384	hmac_packet::hmac_set (crypto_ctx *ctx)
287	{	385	{
…		…
296	hmac_gen (ctx);	394	hmac_gen (ctx);
297		395
298	return !memcmp (hmac, hmac_digest, HMACLENGTH);	396	return !memcmp (hmac, hmac_digest, HMACLENGTH);
299	}	397	}
300		398
		399	void
301	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	400	vpn_packet::set_hdr (ptype type_, unsigned int dst)
302	{	401	{
303	type = type_;	402	type = type_;
304		403
305	int src = THISNODE->id;	404	int src = THISNODE->id;
306		405
…		…
310	}	409	}
311		410
312	#define MAXVPNDATA (MAX_MTU - 6 - 6)	411	#define MAXVPNDATA (MAX_MTU - 6 - 6)
313	#define DATAHDR (sizeof (u32) + RAND_SIZE)	412	#define DATAHDR (sizeof (u32) + RAND_SIZE)
314		413
315	struct vpndata_packet:vpn_packet	414	struct vpndata_packet : vpn_packet
		415	{
		416	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		417
		418	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		419	tap_packet unpack (connection conn, u32 &seqno);
		420
		421	private:
		422	const u32 data_hdr_size () const
316	{	423	{
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;	424	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
326	}
327	};	425	}
		426	};
328		427
329	void	428	void
330	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	429	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
331	{	430	{
332	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	431	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
333	int outl = 0, outl2;	432	int outl = 0, outl2;
334	ptype type = PT_DATA_UNCOMPRESSED;	433	ptype type = PT_DATA_UNCOMPRESSED;
335		434
336	#if ENABLE_COMPRESSION	435	#if ENABLE_COMPRESSION
337	u8 cdata[MAX_MTU];	436	u8 cdata[MAX_MTU];
338	u32 cl;
339		437
		438	if (conn->features & FEATURE_COMPRESSION)
		439	{
340	cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	440	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
		441
341	if (cl)	442	if (cl)
342	{	443	{
343	type = PT_DATA_COMPRESSED;	444	type = PT_DATA_COMPRESSED;
344	d = cdata;	445	d = cdata;
345	l = cl + 2;	446	l = cl + 2;
346		447
347	d[0] = cl >> 8;	448	d[0] = cl >> 8;
348	d[1] = cl;	449	d[1] = cl;
		450	}
349	}	451	}
350	#endif	452	#endif
351		453
352	EVP_EncryptInit_ex (cctx, 0, 0, 0, 0);	454	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
353		455
354	struct {	456	struct {
355	#if RAND_SIZE	457	#if RAND_SIZE
356	u8 rnd[RAND_SIZE];	458	u8 rnd[RAND_SIZE];
357	#endif	459	#endif
358	u32 seqno;	460	u32 seqno;
359	} datahdr;	461	} datahdr;
360		462
361	datahdr.seqno = ntohl (seqno);	463	datahdr.seqno = ntohl (seqno);
362	#if RAND_SIZE	464	#if RAND_SIZE
363	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	465	// NB: a constant (per session) random prefix
		466	// is likely enough, but we don't take any chances.
		467	conn->oiv.get (datahdr.rnd, RAND_SIZE);
364	#endif	468	#endif
365		469
366	EVP_EncryptUpdate (cctx,	470	require (EVP_EncryptUpdate (cctx,
367	(unsigned char *) data + outl, &outl2,	471	(unsigned char *) data + outl, &outl2,
368	(unsigned char *) &datahdr, DATAHDR);	472	(unsigned char *) &datahdr, DATAHDR));
369	outl += outl2;	473	outl += outl2;
370		474
371	EVP_EncryptUpdate (cctx,	475	require (EVP_EncryptUpdate (cctx,
372	(unsigned char *) data + outl, &outl2,	476	(unsigned char *) data + outl, &outl2,
373	(unsigned char *) d, l);	477	(unsigned char *) d, l));
374	outl += outl2;	478	outl += outl2;
375		479
376	EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2);	480	require (EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2));
377	outl += outl2;	481	outl += outl2;
378		482
379	len = outl + data_hdr_size ();	483	len = outl + data_hdr_size ();
380		484
381	set_hdr (type, dst);	485	set_hdr (type, dst);
…		…
390	int outl = 0, outl2;	494	int outl = 0, outl2;
391	tap_packet *p = new tap_packet;	495	tap_packet *p = new tap_packet;
392	u8 *d;	496	u8 *d;
393	u32 l = len - data_hdr_size ();	497	u32 l = len - data_hdr_size ();
394		498
395	EVP_DecryptInit_ex (cctx, 0, 0, 0, 0);	499	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
396		500
397	#if ENABLE_COMPRESSION	501	#if ENABLE_COMPRESSION
398	u8 cdata[MAX_MTU];	502	u8 cdata[MAX_MTU];
399		503
400	if (type == PT_DATA_COMPRESSED)	504	if (type == PT_DATA_COMPRESSED)
401	d = cdata;	505	d = cdata;
402	else	506	else
403	#endif	507	#endif
404	d = &(*p)[6 + 6 - DATAHDR];	508	d = &(*p)[6 + 6] - DATAHDR;
405		509
406	/* this overwrites part of the src mac, but we fix that later */	510	// we play do evil games with the struct layout atm.
		511	// pending better solutions, we at least do some verification.
		512	// this is fine, as we left ISO territory long ago.
		513	require (DATAHDR <= 16);
		514	require ((u8 )(&p->len + 1) == &(p)[0]);
		515
		516	// this can overwrite the len/dst/src fields
407	EVP_DecryptUpdate (cctx,	517	require (EVP_DecryptUpdate (cctx,
408	d, &outl2,	518	d, &outl2,
409	(unsigned char *)&data, len - data_hdr_size ());	519	(unsigned char *)&data, len - data_hdr_size ()));
410	outl += outl2;	520	outl += outl2;
411		521
412	EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2);	522	require (EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2));
413	outl += outl2;	523	outl += outl2;
414		524
415	seqno = ntohl ((u32 )(d + RAND_SIZE));	525	seqno = ntohl ((u32 )(d + RAND_SIZE));
416		526
417	id2mac (dst () ? dst() : THISNODE->id, p->dst);	527	id2mac (dst () ? dst() : THISNODE->id, p->dst);
…		…
442	}	552	}
443	};	553	};
444		554
445	struct config_packet : vpn_packet	555	struct config_packet : vpn_packet
446	{	556	{
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;	557	u8 prot_major, prot_minor, randsize;
451	u8 flags, challengelen, pad2, pad3;	558	u8 flags, features, pad6, pad7, pad8;
452	u32 cipher_nid, digest_nid, hmac_nid;	559	u32 cipher_nid, mac_nid, auth_nid;
453
454	const u8 curflags () const
455	{
456	return 0x80
457	\| (ENABLE_COMPRESSION ? 0x01 : 0x00);
458	}
459		560
460	void setup (ptype type, int dst);	561	void setup (ptype type, int dst);
461	bool chk_config () const;	562	bool chk_config () const;
		563
		564	static u8 get_features ()
		565	{
		566	u8 f = 0;
		567	#if ENABLE_COMPRESSION
		568	f \|= FEATURE_COMPRESSION;
		569	#endif
		570	#if ENABLE_ROHC
		571	f \|= FEATURE_ROHC;
		572	#endif
		573	#if ENABLE_BRIDGING
		574	f \|= FEATURE_BRIDGING;
		575	#endif
		576	return f;
		577	}
462	};	578	};
463		579
		580	void
464	void config_packet::setup (ptype type, int dst)	581	config_packet::setup (ptype type, int dst)
465	{	582	{
466	prot_major = PROTOCOL_MAJOR;	583	prot_major = PROTOCOL_MAJOR;
467	prot_minor = PROTOCOL_MINOR;	584	prot_minor = PROTOCOL_MINOR;
468	randsize = RAND_SIZE;	585	randsize = RAND_SIZE;
469	hmaclen = HMACLENGTH;	586	flags = 0;
470	flags = curflags ();	587	features = get_features ();
471	challengelen = sizeof (rsachallenge);
472		588
473	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	589	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
474	digest_nid = htonl (EVP_MD_type (RSA_HASH));
475	hmac_nid = htonl (EVP_MD_type (DIGEST));	590	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		591	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
476		592
477	len = sizeof (*this) - sizeof (net_packet);	593	len = sizeof (*this) - sizeof (net_packet);
478	set_hdr (type, dst);	594	set_hdr (type, dst);
479	}	595	}
480		596
		597	bool
481	bool config_packet::chk_config () const	598	config_packet::chk_config () const
482	{	599	{
483	if (prot_major != PROTOCOL_MAJOR)	600	if (prot_major != PROTOCOL_MAJOR)
484	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	601	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
485	else if (randsize != RAND_SIZE)	602	else if (randsize != RAND_SIZE)
486	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	603	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 (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
489	else if (flags != curflags ())
490	slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ());
491	else if (challengelen != sizeof (rsachallenge))
492	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
493	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	604	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
494	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	605	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 (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
497	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	606	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
498	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	607	slog (L_WARN, _("mac algo mismatch (remote %x <=> local %x)"), ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		608	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		609	slog (L_WARN, _("auth algo mismatch (remote %x <=> local %x)"), ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
499	else	610	else
500	return true;	611	return true;
501		612
502	return false;	613	return false;
503	}	614	}
504		615
505	struct auth_req_packet : config_packet	616	struct auth_req_packet : config_packet // UNPROTECTED
506	{	617	{
507	char magic[8];	618	char magic[8];
508	u8 initiate; // false if this is just an automatic reply	619	u8 initiate; // false if this is just an automatic reply
509	u8 protocols; // supported protocols (will get patches on forward)	620	u8 protocols; // supported protocols (will be patched on forward)
510	u8 pad2, pad3;	621	u8 pad2, pad3;
511	rsaid id;	622	auth_encr encr;
512	rsaencrdata encr;
513		623
514	auth_req_packet (int dst, bool initiate_, u8 protocols_)	624	auth_req_packet (int dst, bool initiate_, u8 protocols_)
515	{	625	{
516	config_packet::setup (PT_AUTH_REQ, dst);	626	config_packet::setup (PT_AUTH_REQ, dst);
517	strncpy (magic, MAGIC, 8);	627	memcpy (magic, MAGIC, 8);
518	initiate = !!initiate_;	628	initiate = !!initiate_;
519	protocols = protocols_;	629	protocols = protocols_;
520		630
521	len = sizeof (*this) - sizeof (net_packet);	631	len = sizeof (*this) - sizeof (net_packet);
522	}	632	}
523	};	633	};
524		634
525	struct auth_res_packet : config_packet	635	struct auth_res_packet : config_packet // UNPROTECTED
526	{	636	{
527	rsaid id;
528	u8 pad1, pad2, pad3;
529	u8 response_len; // encrypted length
530	rsaresponse response;	637	auth_response response;
531		638
532	auth_res_packet (int dst)	639	auth_res_packet (int dst)
533	{	640	{
534	config_packet::setup (PT_AUTH_RES, dst);	641	config_packet::setup (PT_AUTH_RES, dst);
535		642
…		…
569	};	676	};
570		677
571	/////////////////////////////////////////////////////////////////////////////	678	/////////////////////////////////////////////////////////////////////////////
572		679
573	void	680	void
574	connection::connection_established ()	681	connection::connection_established (const sockinfo &rsi)
575	{	682	{
		683	if (!have_snd_auth \|\| !have_rcv_auth)
		684	return;
		685
		686	si = rsi;
		687	protocol = rsi.prot;
		688
		689	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		690	conf->nodename, (const char *)rsi,
		691	is_direct ? "direct" : "forwarded",
		692	PROTOCOL_MAJOR, prot_minor);
		693
		694	if (::conf.script_node_up)
		695	{
		696	run_script_cb *cb = new run_script_cb;
		697	cb->set<connection, &connection::script_node_up> (this);
		698	run_script_queued (cb, _("node-up command execution failed, continuing."));
		699	}
		700
		701	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		702	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
		703
		704	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		705	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		706
		707	oiv.reset ();
		708
		709	// make sure rekeying timeouts are slightly asymmetric
		710	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
		711	rekey.start (rekey_interval, rekey_interval);
		712
		713	keepalive.start (::conf.keepalive);
		714
		715	// send queued packets
576	if (ictx && octx)	716	if (ictx && octx)
577	{	717	{
578	connectmode = conf->connectmode;	718	while (tap_packet p = (tap_packet )data_queue.get ())
579
580	rekey.start (NOW + ::conf.rekey);
581	keepalive.start (NOW + ::conf.keepalive);
582
583	// send queued packets
584	if (ictx && octx)
585	{	719	{
586	while (tap_packet p = (tap_packet )data_queue.get ())
587	{
588	send_data_packet (p);	720	if (p->len) send_data_packet (p);
589	delete p;	721	delete p;
590	}
591
592	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
593	{
594	send_vpn_packet (p, si, IPTOS_RELIABILITY);
595	delete p;
596	}
597	}	722	}
		723
		724	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		725	{
		726	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
		727	delete p;
		728	}
598	}	729	}
		730
		731	vpn->connection_established (this);
		732	}
		733
		734	void
		735	connection::reset_si ()
		736	{
		737	if (vpn->can_direct (THISNODE, conf))
		738	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
599	else	739	else
600	{	740	{
601	retry_cnt = 0;	741	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
602	establish_connection.start (NOW + 5);	742	protocol = 0;
603	keepalive.reset ();
604	rekey.reset ();
605	}	743	}
606	}
607
608	void
609	connection::reset_si ()
610	{
611	protocol = best_protocol (THISNODE->protocols & conf->protocols);
612
613	// mask out protocols we cannot establish
614	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
615	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
616		744
617	si.set (conf, protocol);	745	si.set (conf, protocol);
		746
		747	is_direct = si.valid ();
618	}	748	}
619		749
620	// ensure sockinfo is valid, forward if necessary	750	// ensure sockinfo is valid, forward if necessary
621	const sockinfo &	751	const sockinfo &
622	connection::forward_si (const sockinfo &si) const	752	connection::forward_si (const sockinfo &si) const
623	{	753	{
624	if (!si.valid ())	754	if (!si.valid ())
625	{	755	{
626	connection *r = vpn->find_router ();	756	connection *r = vpn->find_router_for (this);
627		757
628	if (r)	758	if (r)
629	{	759	{
630	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	760	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
631	conf->nodename, r->conf->nodename);	761	conf->nodename, r->conf->nodename);
632	return r->si;	762	return r->si;
633	}	763	}
634	else	764	else
635	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	765	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
636	conf->nodename);	766	conf->nodename);
637	}	767	}
638		768
639	return si;	769	return si;
640	}	770	}
…		…
650	connection::send_ping (const sockinfo &si, u8 pong)	780	connection::send_ping (const sockinfo &si, u8 pong)
651	{	781	{
652	ping_packet *pkt = new ping_packet;	782	ping_packet *pkt = new ping_packet;
653		783
654	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	784	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		785
		786	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
655	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	787	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
656		788
657	delete pkt;	789	delete pkt;
658	}	790	}
659		791
…		…
674	void	806	void
675	connection::send_auth_request (const sockinfo &si, bool initiate)	807	connection::send_auth_request (const sockinfo &si, bool initiate)
676	{	808	{
677	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	809	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
678		810
679	rsachallenge chg;	811	generate_auth_data ();
		812	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
680		813
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);	814	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	815	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
691		816
692	delete pkt;	817	delete pkt;
693	}	818	}
694		819
695	void	820	void
696	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	821	connection::send_auth_response (const sockinfo &si)
697	{	822	{
698	auth_res_packet *pkt = new auth_res_packet (conf->id);	823	auth_res_packet *pkt = new auth_res_packet (conf->id);
699		824
700	pkt->id = id;	825	auth_hash (rcv_auth, pkt->response.mac);
		826	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
701		827
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);	828	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	829	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
709		830
710	delete pkt;	831	delete pkt;
711	}	832	}
712		833
713	void	834	void
714	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	835	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
715	{	836	{
716	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	837	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
717	conf->id, rid, (const char *)rsi);	838	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		839	conf->protocols);
718		840
719	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	841	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
720		842
721	r->hmac_set (octx);	843	r->hmac_set (octx);
722	send_vpn_packet (r, si);	844	send_vpn_packet (r, si);
723		845
724	delete r;	846	delete r;
725	}	847	}
726		848
727	void	849	inline void
728	connection::establish_connection_cb (time_watcher &w)	850	connection::establish_connection_cb (ev::timer &w, int revents)
729	{	851	{
730	if (ictx \|\| conf == THISNODE	852	if (!(ictx && octx)
		853	&& conf != THISNODE
731	\|\| connectmode == conf_node::C_NEVER	854	&& connectmode != conf_node::C_NEVER
732	\|\| connectmode == conf_node::C_DISABLED)	855	&& connectmode != conf_node::C_DISABLED
733	w.at = TSTAMP_CANCEL;	856	&& !w.is_active ())
734	else if (w.at <= NOW)
735	{	857	{
736	double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;	858	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
737		859	// and stop trying. should probably be handled by a per-connection expire handler.
738	if (retry_int < 3600 * 8)	860	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		861	{
		862	reset_connection ();
739	retry_cnt++;	863	return;
		864	}
740		865
741	w.at = NOW + retry_int;	866	last_establish_attempt = ev_now ();
		867
		868	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
		869	? (retry_cnt & 3) + 1
		870	: 1 << (retry_cnt >> 2));
742		871
743	reset_si ();	872	reset_si ();
744		873
745	if (si.prot && !si.host)	874	bool slow = si.prot & PROT_SLOW;
		875
		876	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
		877	{
		878	/TODO/ /* start the timer so we don't recurse endlessly */
		879	w.start (1);
746	vpn->send_connect_request (conf->id);	880	vpn->send_connect_request (this);
		881	}
747	else	882	else
748	{	883	{
		884	if (si.valid ())
		885	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		886	conf->nodename, (const char *)si);
		887
749	const sockinfo &dsi = forward_si (si);	888	const sockinfo &dsi = forward_si (si);
		889
		890	slow = slow \|\| (dsi.prot & PROT_SLOW);
750		891
751	if (dsi.valid () && auth_rate_limiter.can (dsi))	892	if (dsi.valid () && auth_rate_limiter.can (dsi))
752	{	893	{
753	if (retry_cnt < 4)	894	if (retry_cnt < 4)
754	send_auth_request (dsi, true);	895	send_auth_request (dsi, true);
755	else	896	else
756	send_ping (dsi, 0);	897	send_ping (dsi, 0);
757	}	898	}
758	}	899	}
		900
		901	retry_int *= slow ? 8. : 0.9;
		902
		903	if (retry_int < conf->max_retry)
		904	retry_cnt++;
		905	else
		906	retry_int = conf->max_retry;
		907
		908	w.start (retry_int);
759	}	909	}
760	}	910	}
761		911
762	void	912	void
763	connection::reset_connection ()	913	connection::reset_connection ()
…		…
766	{	916	{
767	slog (L_INFO, _("%s(%s): connection lost"),	917	slog (L_INFO, _("%s(%s): connection lost"),
768	conf->nodename, (const char *)si);	918	conf->nodename, (const char *)si);
769		919
770	if (::conf.script_node_down)	920	if (::conf.script_node_down)
771	run_script (run_script_cb (this, &connection::script_node_down), false);	921	{
		922	run_script_cb *cb = new run_script_cb;
		923	cb->set<connection, &connection::script_node_down> (this);
		924	run_script_queued (cb, _("node-down command execution failed, continuing."));
		925	}
772	}	926	}
773		927
774	delete ictx; ictx = 0;	928	delete ictx; ictx = 0;
775	delete octx; octx = 0;	929	delete octx; octx = 0;
776		930
777	si.host= 0;	931	si.host = 0;
778		932
		933	have_snd_auth = false;
		934	have_rcv_auth = false;
		935	auth_expire = 0.;
		936
779	last_activity = 0;	937	last_activity = 0.;
		938	//last_si_change = 0.;
780	retry_cnt = 0;	939	retry_cnt = 0;
781		940
782	rekey.reset ();	941	rekey.stop ();
783	keepalive.reset ();	942	keepalive.stop ();
784	establish_connection.reset ();	943	establish_connection.stop ();
785	}	944	}
786		945
787	void	946	void
788	connection::shutdown ()	947	connection::shutdown ()
789	{	948	{
…		…
791	send_reset (si);	950	send_reset (si);
792		951
793	reset_connection ();	952	reset_connection ();
794	}	953	}
795		954
796	void	955	// poor-man's rekeying
797	connection::rekey_cb (time_watcher &w)	956	inline void
		957	connection::rekey_cb (ev::timer &w, int revents)
798	{	958	{
799	w.at = TSTAMP_CANCEL;
800
801	reset_connection ();	959	reset_connection ();
802	establish_connection ();	960	establish_connection ();
803	}	961	}
804		962
805	void	963	void
…		…
820	if (oseqno > MAX_SEQNO)	978	if (oseqno > MAX_SEQNO)
821	rekey ();	979	rekey ();
822	}	980	}
823		981
824	void	982	void
		983	connection::post_inject_queue ()
		984	{
		985	// force a connection every now and when when packets are sent (max 1/s)
		986	if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
		987	establish_connection.stop ();
		988
		989	establish_connection ();
		990	}
		991
		992	void
825	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	993	connection::inject_data_packet (tap_packet *pkt)
826	{	994	{
827	if (ictx && octx)	995	if (ictx && octx)
828	send_data_packet (pkt);	996	send_data_packet (pkt);
829	else	997	else
830	{	998	{
831	if (!broadcast)//DDDD
832	data_queue.put (new tap_packet (*pkt));	999	data_queue.put (new tap_packet (*pkt));
833		1000	post_inject_queue ();
834	establish_connection ();
835	}	1001	}
836	}	1002	}
837		1003
		1004	void
838	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1005	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
839	{	1006	{
840	if (ictx && octx)	1007	if (ictx && octx)
841	send_vpn_packet (pkt, si, tos);	1008	send_vpn_packet (pkt, si, tos);
842	else	1009	else
843	{	1010	{
844	vpn_queue.put (new vpn_packet (*pkt));	1011	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
845		1012	post_inject_queue ();
846	establish_connection ();
847	}	1013	}
848	}	1014	}
849		1015
850	void	1016	void
851	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1017	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
852	{	1018	{
853	last_activity = NOW;	1019	last_activity = ev_now ();
854		1020
855	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1021	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
856	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1022	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
		1023
		1024	if (connectmode == conf_node::C_DISABLED)
		1025	return;
857		1026
858	switch (pkt->typ ())	1027	switch (pkt->typ ())
859	{	1028	{
860	case vpn_packet::PT_PING:	1029	case vpn_packet::PT_PING:
		1030	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1031
861	// we send pings instead of auth packets after some retries,	1032	// we send pings instead of auth packets after some retries,
862	// so reset the retry counter and establish a connection	1033	// so reset the retry counter and establish a connection
863	// when we receive a ping.	1034	// when we receive a ping.
864	if (!ictx)	1035	if (!ictx)
865	{	1036	{
866	if (auth_rate_limiter.can (rsi))	1037	if (auth_rate_limiter.can (rsi))
867	send_auth_request (rsi, true);	1038	send_auth_request (rsi, true);
868	}	1039	}
869	else	1040	else
		1041	// we would love to change the socket address here, but ping's aren't
		1042	// authenticated, so we best ignore it.
870	send_ping (rsi, 1); // pong	1043	send_ping (rsi, 1); // pong
871		1044
872	break;	1045	break;
873		1046
874	case vpn_packet::PT_PONG:	1047	case vpn_packet::PT_PONG:
		1048	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1049
		1050	// a PONG might mean that the other side doesn't really know
		1051	// about our desire for communication.
		1052	establish_connection ();
875	break;	1053	break;
876		1054
877	case vpn_packet::PT_RESET:	1055	case vpn_packet::PT_RESET:
878	{	1056	{
879	reset_connection ();	1057	reset_connection ();
880		1058
881	config_packet p = (config_packet ) pkt;	1059	config_packet p = (config_packet ) pkt;
882		1060
883	if (!p->chk_config ())	1061	if (!p->chk_config ())
884	{	1062	{
885	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1063	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
886	conf->nodename, (const char *)rsi);	1064	conf->nodename, (const char *)rsi);
887	connectmode = conf_node::C_DISABLED;	1065	connectmode = conf_node::C_DISABLED;
888	}	1066	}
889	else if (connectmode == conf_node::C_ALWAYS)	1067	else if (connectmode == conf_node::C_ALWAYS)
890	establish_connection ();	1068	establish_connection ();
…		…
892	break;	1070	break;
893		1071
894	case vpn_packet::PT_AUTH_REQ:	1072	case vpn_packet::PT_AUTH_REQ:
895	if (auth_rate_limiter.can (rsi))	1073	if (auth_rate_limiter.can (rsi))
896	{	1074	{
897	auth_req_packet p = (auth_req_packet ) pkt;	1075	auth_req_packet p = (auth_req_packet )pkt;
898		1076
899	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1077	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1078	conf->nodename, p->initiate ? "initiate" : "reply",
		1079	p->protocols, p->features);
900		1080
901	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1081	if (p->chk_config () && !memcmp (p->magic, MAGIC, 8))
902	{	1082	{
903	if (p->prot_minor != PROTOCOL_MINOR)	1083	if (p->prot_minor != PROTOCOL_MINOR)
904	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1084	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
905	conf->nodename, (const char *)rsi,	1085	conf->nodename, (const char *)rsi,
906	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1086	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
907		1087
908	if (p->initiate)	1088	if (p->initiate)
909	send_auth_request (rsi, false);	1089	send_auth_request (rsi, false);
910		1090
911	rsachallenge k;	1091	auth_data auth;
912		1092
913	if (0 > RSA_private_decrypt (sizeof (p->encr),	1093	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
914	(unsigned char )&p->encr, (unsigned char )&k,
915	::conf.rsa_key, RSA_PKCS1_OAEP_PADDING))
916	{	1094	{
917	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1095	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
918	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1096	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
919	break;
920	}	1097	}
921	else	1098	else
922	{	1099	{
923	delete octx;	1100	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
924		1101
925	octx = new crypto_ctx (k, 1);	1102	rcv_auth = auth;
926	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1103	have_rcv_auth = true;
927		1104
		1105	send_auth_response (rsi);
		1106
		1107	if (chg)
		1108	{
928	conf->protocols = p->protocols;	1109	conf->protocols = p->protocols;
		1110	features = p->features & config_packet::get_features ();
929		1111
930	send_auth_response (rsi, p->id, k);
931
932	connection_established ();	1112	connection_established (rsi);
933
934	break;	1113	}
935	}	1114	}
		1115
		1116	break;
936	}	1117	}
937	else	1118	else
938	slog (L_WARN, _("%s(%s): protocol mismatch"),	1119	slog (L_WARN, _("%s(%s): protocol mismatch."),
939	conf->nodename, (const char *)rsi);	1120	conf->nodename, (const char *)rsi);
940		1121
941	send_reset (rsi);	1122	send_reset (rsi);
942	}	1123	}
943		1124
944	break;	1125	break;
945		1126
946	case vpn_packet::PT_AUTH_RES:	1127	case vpn_packet::PT_AUTH_RES:
947	{	1128	{
948	auth_res_packet p = (auth_res_packet ) pkt;	1129	auth_res_packet p = (auth_res_packet )pkt;
949		1130
950	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1131	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
951		1132
952	if (p->chk_config ())	1133	if (p->chk_config ())
953	{	1134	{
954	if (p->prot_minor != PROTOCOL_MINOR)	1135	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
955	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
956	conf->nodename, (const char *)rsi,
957	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
958
959	rsachallenge chg;
960
961	if (!rsa_cache.find (p->id, chg))
962	{	1136	{
963	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1137	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
964	conf->nodename, (const char *)rsi);	1138	conf->nodename, (const char *)rsi);
965	break;
966	}	1139	}
967	else	1140	else if (!have_snd_auth)
968	{	1141	{
969	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1142	if (p->prot_minor != PROTOCOL_MINOR)
970		1143	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
971	if (!p->hmac_chk (cctx))
972	{
973	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
974	"could be an attack, or just corruption or an synchronization error"),
975	conf->nodename, (const char *)rsi);	1144	conf->nodename, (const char *)rsi,
976	break;	1145	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
977	}
978	else
979	{
980	rsaresponse h;
981		1146
982	rsa_hash (p->id, chg, h);
983
984	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
985	{
986	prot_minor = p->prot_minor;	1147	prot_minor = p->prot_minor;
		1148	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
987		1149
988	delete ictx; ictx = cctx;	1150	have_snd_auth = true;
989
990	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
991
992	si = rsi;
993	protocol = rsi.prot;
994
995	connection_established ();	1151	connection_established (rsi);
996
997	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
998	conf->nodename, (const char *)rsi,
999	p->prot_major, p->prot_minor);
1000
1001	if (::conf.script_node_up)
1002	run_script (run_script_cb (this, &connection::script_node_up), false);
1003
1004	break;
1005	}
1006	else
1007	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1008	conf->nodename, (const char *)rsi);
1009	}
1010
1011	delete cctx;
1012	}	1152	}
		1153
		1154	break;
1013	}	1155	}
1014	}	1156	}
1015		1157
1016	send_reset (rsi);	1158	send_reset (rsi);
1017	break;	1159	break;
…		…
1028	{	1170	{
1029	vpndata_packet p = (vpndata_packet )pkt;	1171	vpndata_packet p = (vpndata_packet )pkt;
1030		1172
1031	if (!p->hmac_chk (ictx))	1173	if (!p->hmac_chk (ictx))
1032	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1174	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1033	"could be an attack, or just corruption or an synchronization error"),	1175	"could be an attack, or just corruption or a synchronization error."),
1034	conf->nodename, (const char *)rsi);	1176	conf->nodename, (const char *)rsi);
1035	else	1177	else
1036	{	1178	{
1037	u32 seqno;	1179	u32 seqno;
1038	tap_packet *d = p->unpack (this, seqno);	1180	tap_packet *d = p->unpack (this, seqno);
		1181	int seqclass = iseqno.seqno_classify (seqno);
1039		1182
1040	if (iseqno.recv_ok (seqno))	1183	if (seqclass == 0) // ok
1041	{	1184	{
1042	vpn->tap->send (d);	1185	vpn->tap->send (d);
1043		1186
1044	if (si != rsi)	1187	if (si != rsi)
1045	{	1188	{
1046	// fast re-sync on connection changes, useful especially for tcp/ip	1189	// fast re-sync on source address changes, useful especially for tcp/ip
		1190	//if (last_si_change < ev_now () + 5.)
1047	si = rsi;	1191	// {
1048
1049	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1192	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1050	conf->nodename, (const char )si, (const char )rsi);	1193	conf->nodename, (const char )si, (const char )rsi);
		1194
		1195	si = rsi;
		1196
		1197	if (::conf.script_node_change)
		1198	{
		1199	run_script_cb *cb = new run_script_cb;
		1200	cb->set<connection, &connection::script_node_change> (this);
		1201	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1202	}
		1203
		1204	// }
		1205	//else
		1206	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1207	// conf->nodename, (const char )si, (const char )rsi);
1051	}	1208	}
1052
1053	delete d;
1054
1055	break;
1056	}	1209	}
		1210	else if (seqclass == 1) // far history
		1211	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1212	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1213	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1214	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1215	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1216	else if (seqclass == 3) // reset
		1217	{
		1218	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1219	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1220	send_reset (rsi);
		1221	}
		1222
		1223	delete d;
		1224	break;
1057	}	1225	}
1058	}	1226	}
1059		1227
1060	send_reset (rsi);	1228	send_reset (rsi);
1061	break;	1229	break;
1062		1230
1063	case vpn_packet::PT_CONNECT_REQ:	1231	case vpn_packet::PT_CONNECT_REQ:
1064	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1232	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1065	{	1233	{
1066	connect_req_packet p = (connect_req_packet ) pkt;	1234	connect_req_packet p = (connect_req_packet )pkt;
1067		1235
1068	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1236	if (p->id > 0 && p->id <= vpn->conns.size ())
1069	connection *c = vpn->conns[p->id - 1];
1070	conf->protocols = p->protocols;
1071
1072	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1073	conf->id, p->id, c->ictx && c->octx);
1074
1075	if (c->ictx && c->octx)
1076	{	1237	{
		1238	connection *c = vpn->conns[p->id - 1];
		1239	conf->protocols = p->protocols;
		1240
		1241	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1242	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1243	p->protocols,
		1244	c->ictx && c->octx);
		1245
		1246	if (c->ictx && c->octx)
		1247	{
1077	// send connect_info packets to both sides, in case one is	1248	// send connect_info packets to both sides, in case one is
1078	// behind a nat firewall (or both ;)	1249	// behind a nat firewall (or both ;)
1079	c->send_connect_info (conf->id, si, conf->protocols);	1250	c->send_connect_info (conf->id, si, conf->protocols);
1080	send_connect_info (c->conf->id, c->si, c->conf->protocols);	1251	send_connect_info (c->conf->id, c->si, c->conf->protocols);
		1252	}
		1253	else
		1254	c->establish_connection ();
1081	}	1255	}
1082	else	1256	else
1083	c->establish_connection ();	1257	slog (L_WARN,
		1258	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1259	p->id);
1084	}	1260	}
1085		1261
1086	break;	1262	break;
1087		1263
1088	case vpn_packet::PT_CONNECT_INFO:	1264	case vpn_packet::PT_CONNECT_INFO:
1089	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1265	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1090	{	1266	{
1091	connect_info_packet p = (connect_info_packet ) pkt;	1267	connect_info_packet p = (connect_info_packet )pkt;
1092		1268
1093	assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything	1269	if (p->id > 0 && p->id <= vpn->conns.size ())
1094		1270	{
1095	connection *c = vpn->conns[p->id - 1];	1271	connection *c = vpn->conns[p->id - 1];
1096		1272
1097	c->conf->protocols = p->protocols;	1273	c->conf->protocols = p->protocols;
1098	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1274	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1099	p->si.upgrade_protocol (protocol, c->conf);	1275	p->si.upgrade_protocol (protocol, c->conf);
1100		1276
1101	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1277	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1102	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1278	conf->nodename,
		1279	vpn->conns[p->id - 1]->conf->nodename,
		1280	(const char *)p->si,
		1281	p->protocols,
		1282	protocol,
		1283	p->si.supported_protocols (c->conf),
		1284	!c->ictx && !c->octx);
1103		1285
1104	const sockinfo &dsi = forward_si (p->si);	1286	const sockinfo &dsi = forward_si (p->si);
1105		1287
1106	if (dsi.valid ())	1288	if (dsi.valid ())
1107	c->send_auth_request (dsi, true);	1289	c->send_auth_request (dsi, true);
		1290	else
		1291	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1292	vpn->conns[p->id - 1]->conf->nodename,
		1293	(const char *)p->si);
		1294	}
		1295	else
		1296	slog (L_WARN,
		1297	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1298	p->id);
1108	}	1299	}
1109		1300
1110	break;	1301	break;
1111		1302
1112	default:	1303	default:
1113	send_reset (rsi);	1304	send_reset (rsi);
1114	break;	1305	break;
1115	}	1306	}
1116	}	1307	}
1117		1308
1118	void connection::keepalive_cb (time_watcher &w)	1309	inline void
		1310	connection::keepalive_cb (ev::timer &w, int revents)
1119	{	1311	{
1120	if (NOW >= last_activity + ::conf.keepalive + 30)	1312	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1313
		1314	if (when >= 0)
		1315	w.start (when);
		1316	else if (when < -15)
1121	{	1317	{
1122	reset_connection ();	1318	reset_connection ();
1123	establish_connection ();	1319	establish_connection ();
1124	}	1320	}
1125	else if (NOW < last_activity + ::conf.keepalive)
1126	w.at = last_activity + ::conf.keepalive;
1127	else if (conf->connectmode != conf_node::C_ONDEMAND	1321	else if (conf->connectmode != conf_node::C_ONDEMAND
1128	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1322	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1129	{	1323	{
		1324	w.start (3);
1130	send_ping (si);	1325	send_ping (si);
1131	w.at = NOW + 5;
1132	}	1326	}
1133	else if (NOW < last_activity + ::conf.keepalive + 10)	1327	else if (when >= -10)
1134	// hold ondemand connections implicitly a few seconds longer	1328	// hold ondemand connections implicitly a few seconds longer
1135	// should delete octx, though, or something like that ;)	1329	// should delete octx, though, or something like that ;)
1136	w.at = last_activity + ::conf.keepalive + 10;	1330	w.start (when + 10);
1137	else	1331	else
1138	reset_connection ();	1332	reset_connection ();
1139	}	1333	}
1140		1334
		1335	void
1141	void connection::send_connect_request (int id)	1336	connection::send_connect_request (int id)
1142	{	1337	{
1143	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1338	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1144		1339
1145	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1340	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1341	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1342	THISNODE->protocols);
1146	p->hmac_set (octx);	1343	p->hmac_set (octx);
1147	send_vpn_packet (p, si);	1344	send_vpn_packet (p, si);
1148		1345
1149	delete p;	1346	delete p;
1150	}	1347	}
1151		1348
1152	void connection::script_node ()	1349	void
		1350	connection::script_init_env (const char *ext)
1153	{	1351	{
1154	vpn->script_if_up ();
1155
1156	char *env;	1352	char *env;
		1353	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
		1354	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
		1355	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
		1356	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
		1357	conf->id & 0xff); putenv (env);
		1358	}
		1359
		1360	void
		1361	connection::script_init_connect_env ()
		1362	{
		1363	vpn->script_init_env ();
		1364
		1365	char *env;
1157	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1366	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1367	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1158	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1368	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1159	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1369	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1160	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1370	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1161	}	1371	}
1162		1372
		1373	inline const char *
1163	const char *connection::script_node_up ()	1374	connection::script_node_up ()
1164	{	1375	{
1165	script_node ();	1376	script_init_connect_env ();
1166		1377
1167	putenv ("STATE=up");	1378	putenv ((char *)"STATE=up");
1168		1379
		1380	char *filename;
		1381	asprintf (&filename,
		1382	"%s/%s",
		1383	confbase,
1169	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1384	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1170	}
1171		1385
		1386	return filename;
		1387	}
		1388
		1389	inline const char *
		1390	connection::script_node_change ()
		1391	{
		1392	script_init_connect_env ();
		1393
		1394	putenv ((char *)"STATE=change");
		1395
		1396	char *filename;
		1397	asprintf (&filename,
		1398	"%s/%s",
		1399	confbase,
		1400	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1401
		1402	return filename;
		1403	}
		1404
		1405	inline const char *
1172	const char *connection::script_node_down ()	1406	connection::script_node_down ()
1173	{	1407	{
1174	script_node ();	1408	script_init_connect_env ();
1175		1409
1176	putenv ("STATE=down");	1410	putenv ((char *)"STATE=down");
1177		1411
1178	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1412	char *filename;
1179	}	1413	asprintf (&filename,
		1414	"%s/%s",
		1415	confbase,
		1416	::conf.script_node_down ? ::conf.script_node_down : "node-down");
1180		1417
		1418	return filename;
		1419	}
		1420
1181	connection::connection(struct vpn *vpn_)	1421	connection::connection (struct vpn vpn, conf_node conf)
1182	: vpn(vpn_)	1422	: vpn(vpn), conf(conf),
1183	, rekey (this, &connection::rekey_cb)	1423	#if ENABLE_DNS
1184	, keepalive (this, &connection::keepalive_cb)	1424	dns (0),
		1425	#endif
		1426	data_queue(conf->max_ttl, conf->max_queue + 1),
		1427	vpn_queue(conf->max_ttl, conf->max_queue + 1)
		1428	{
		1429	rekey .set<connection, &connection::rekey_cb > (this);
		1430	keepalive .set<connection, &connection::keepalive_cb > (this);
1185	, establish_connection (this, &connection::establish_connection_cb)	1431	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1186	{	1432
		1433	last_establish_attempt = 0.;
1187	octx = ictx = 0;	1434	octx = ictx = 0;
1188	retry_cnt = 0;
1189		1435
1190	connectmode = conf_node::C_ALWAYS; // initial setting	1436	connectmode = conf->connectmode;
		1437
		1438	// queue a dummy packet to force an initial connection attempt
		1439	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1440	vpn_queue.put (new net_packet);
		1441
1191	reset_connection ();	1442	reset_connection ();
1192	}	1443	}
1193		1444
1194	connection::~connection ()	1445	connection::~connection ()
1195	{	1446	{
1196	shutdown ();	1447	shutdown ();
1197	}	1448	}
1198		1449
		1450	void
1199	void connection_init ()	1451	connection_init ()
1200	{	1452	{
1201	auth_rate_limiter.clear ();	1453	auth_rate_limiter.clear ();
1202	reset_rate_limiter.clear ();	1454	reset_rate_limiter.clear ();
1203	}	1455	}
1204		1456

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Comparing gvpe/src/connection.C (file contents): Revision 1.23 by pcg, Wed Oct 22 00:42:53 2003 UTC vs. Revision 1.102 by root, Thu Jul 18 13:35:16 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.23 by pcg, Wed Oct 22 00:42:53 2003 UTC vs.
Revision 1.102 by root, Thu Jul 18 13:35:16 2013 UTC