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

Comparing gvpe/src/connection.C (file contents):
Revision 1.21 by pcg, Thu Oct 16 02:28:36 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) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
3		4
		5	This file is part of GVPE.
		6
4	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
5	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
6	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
7	(at your option) any later version.	10	option) any later version.
8		11
9	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
10	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
12	GNU General Public License for more details.	15	Public License for more details.
13		16
14	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
15	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
16	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.
17	*/	30	*/
18		31
19	#include "config.h"	32	#include "config.h"
20		33
21	extern "C" {
22	# include "lzf/lzf.h"
23	}
24
25	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
26		37
27	#include <openssl/rand.h>	38	#include <openssl/rand.h>
28	#include <openssl/evp.h>	39	#include <openssl/evp.h>
29	#include <openssl/rsa.h>	40	#include <openssl/rsa.h>
30	#include <openssl/err.h>	41	#include <openssl/err.h>
31
32	#include "gettext.h"
33		42
34	#include "conf.h"	43	#include "conf.h"
35	#include "slog.h"	44	#include "slog.h"
36	#include "device.h"	45	#include "device.h"
37	#include "vpn.h"	46	#include "vpn.h"
38	#include "connection.h"	47	#include "connection.h"
		48	#include "hkdf.h"
39		49
40	#include "netcompat.h"	50	#include "netcompat.h"
41		51
42	#if !HAVE_RAND_PSEUDO_BYTES
43	# define RAND_pseudo_bytes RAND_bytes
44	#endif
45
46	#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	//////////////////////////////////////////////////////////////////////////////
47		103
48	struct crypto_ctx	104	struct crypto_ctx
49	{	105	{
50	EVP_CIPHER_CTX cctx;	106	EVP_CIPHER_CTX cctx;
51	HMAC_CTX hctx;	107	HMAC_CTX hctx;
52		108
53	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);
54	~crypto_ctx ();	110	~crypto_ctx ();
55	};	111	};
56		112
57	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)
58	{	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
59	EVP_CIPHER_CTX_init (&cctx);	145	EVP_CIPHER_CTX_init (&cctx);
60	EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc);	146	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
61	HMAC_CTX_init (&hctx);	147	}
62	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
63	}	148	}
64		149
65	crypto_ctx::~crypto_ctx ()	150	crypto_ctx::~crypto_ctx ()
66	{	151	{
67	EVP_CIPHER_CTX_cleanup (&cctx);	152	require (EVP_CIPHER_CTX_cleanup (&cctx));
68	HMAC_CTX_cleanup (&hctx);	153	HMAC_CTX_cleanup (&hctx);
69	}	154	}
70		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
71	static void	183	static void
72	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	184	auth_hash (const auth_data &auth, auth_mac &mac)
73	{	185	{
74	EVP_MD_CTX ctx;	186	HMAC_CTX ctx;
75		187
76	EVP_MD_CTX_init (&ctx);	188	HMAC_CTX_init (&ctx);
77	EVP_DigestInit (&ctx, RSA_HASH);	189	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
78	EVP_DigestUpdate(&ctx, &chg, sizeof chg);	190	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
79	EVP_DigestUpdate(&ctx, &id, sizeof id);	191	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
80	EVP_DigestFinal (&ctx, (unsigned char *)&h, 0);
81	EVP_MD_CTX_cleanup (&ctx);	192	HMAC_CTX_cleanup (&ctx);
82	}	193	}
83		194
84	struct rsa_entry {	195	void
85	tstamp expire;	196	connection::generate_auth_data ()
86	rsaid id;
87	rsachallenge chg;
88	};
89
90	struct rsa_cache : list<rsa_entry>
91	{	197	{
92	void cleaner_cb (time_watcher &w); time_watcher cleaner;	198	if (auth_expire < ev_now ())
93
94	bool find (const rsaid &id, rsachallenge &chg)
95	{
96	for (iterator i = begin (); i != end (); ++i)
97	{
98	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)
99	{
100	memcpy (&chg, &i->chg, sizeof chg);
101
102	erase (i);
103	return true;
104	}
105	}
106
107	if (cleaner.at < NOW)
108	cleaner.start (NOW + RSA_TTL);
109
110	return false;
111	}
112
113	void gen (rsaid &id, rsachallenge &chg)
114	{
115	rsa_entry e;
116
117	RAND_bytes ((unsigned char *)&id, sizeof id);
118	RAND_bytes ((unsigned char *)&chg, sizeof chg);
119
120	e.expire = NOW + RSA_TTL;
121	e.id = id;
122	memcpy (&e.chg, &chg, sizeof chg);
123
124	push_back (e);
125
126	if (cleaner.at < NOW)
127	cleaner.start (NOW + RSA_TTL);
128	}
129
130	rsa_cache ()
131	: cleaner (this, &rsa_cache::cleaner_cb)
132	{ }	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);
133		204
134	} rsa_cache;	205	// eventual response data
135		206	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
136	void rsa_cache::cleaner_cb (time_watcher &w)
137	{
138	if (empty ())
139	w.at = TSTAMP_CANCEL;
140	else
141	{	207	}
142	w.at = NOW + RSA_TTL;
143		208
144	for (iterator i = begin (); i != end (); )	209	// every use prolongs the expiry
145	if (i->expire <= NOW)	210	auth_expire = ev_now () + AUTH_TTL;
146	i = erase (i);
147	else
148	++i;
149	}
150	}	211	}
151		212
152	//////////////////////////////////////////////////////////////////////////////	213	//////////////////////////////////////////////////////////////////////////////
153		214
154	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)
155	{	217	{
156	if (queue[i])	218	queue = new pkt [max_queue];
157	{
158	delete queue[i];
159	j = (j + 1) % QUEUEDEPTH;
160	}
161		219
162	queue[i] = p;
163
164	i = (i + 1) % QUEUEDEPTH;
165	}
166
167	net_packet *pkt_queue::get ()
168	{
169	net_packet *p = queue[j];
170
171	if (p)
172	{
173	queue[j] = 0;
174	j = (j + 1) % QUEUEDEPTH;
175	}
176
177	return p;
178	}
179
180	pkt_queue::pkt_queue ()
181	{
182	memset (queue, 0, sizeof (queue));
183	i = 0;	220	i = 0;
184	j = 0;	221	j = 0;
		222
		223	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
185	}	224	}
186		225
187	pkt_queue::~pkt_queue ()	226	pkt_queue::~pkt_queue ()
188	{	227	{
189	for (i = QUEUEDEPTH; --i > 0; )	228	while (net_packet *p = get ())
		229	delete p;
		230
190	delete queue[i];	231	delete [] queue;
191	}	232	}
192		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
193	struct net_rateinfo {	290	struct net_rateinfo
		291	{
194	u32 host;	292	u32 host;
195	double pcnt, diff;	293	double pcnt, diff;
196	tstamp last;	294	tstamp last;
197	};	295	};
198		296
199	// 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.
200	// this implementation ("splay list" ;) is inefficient,	298	// this implementation ("splay list" ;) is inefficient,
201	// but low on resources.	299	// but low on resources.
202	struct net_rate_limiter : list<net_rateinfo>	300	struct net_rate_limiter : list<net_rateinfo>
203	{	301	{
204	static const double ALPHA = 1. - 1. / 600.; // allow bursts	302	# define NRL_ALPHA (1. - 1. / 600.) // allow bursts
205	static const double CUTOFF = 10.; // one event every CUTOFF seconds	303	# define NRL_CUTOFF 10. // one event every CUTOFF seconds
206	static const double EXPIRE = CUTOFF * 30.; // expire entries after this time	304	# define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time
207	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
208		306
209	bool can (const sockinfo &si) { return can((u32)si.host); }	307	bool can (const sockinfo &si) { return can((u32)si.host); }
210	bool can (u32 host);	308	bool can (u32 host);
211	};	309	};
212		310
213	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	311	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
214		312
		313	bool
215	bool net_rate_limiter::can (u32 host)	314	net_rate_limiter::can (u32 host)
216	{	315	{
217	iterator i;	316	iterator i;
218		317
219	for (i = begin (); i != end (); )	318	for (i = begin (); i != end (); )
220	if (i->host == host)	319	if (i->host == host)
221	break;	320	break;
222	else if (i->last < NOW - EXPIRE)	321	else if (i->last < ev_now () - NRL_EXPIRE)
223	i = erase (i);	322	i = erase (i);
224	else	323	else
225	i++;	324	i++;
226		325
227	if (i == end ())	326	if (i == end ())
228	{	327	{
229	net_rateinfo ri;	328	net_rateinfo ri;
230		329
231	ri.host = host;	330	ri.host = host;
232	ri.pcnt = 1.;	331	ri.pcnt = 1.;
233	ri.diff = MAXDIF;	332	ri.diff = NRL_MAXDIF;
234	ri.last = NOW;	333	ri.last = ev_now ();
235		334
236	push_front (ri);	335	push_front (ri);
237		336
238	return true;	337	return true;
239	}	338	}
240	else	339	else
241	{	340	{
242	net_rateinfo ri (*i);	341	net_rateinfo ri (*i);
243	erase (i);	342	erase (i);
244		343
245	ri.pcnt = ri.pcnt * ALPHA;	344	ri.pcnt = ri.pcnt * NRL_ALPHA;
246	ri.diff = ri.diff * ALPHA + (NOW - ri.last);	345	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
247		346
248	ri.last = NOW;	347	ri.last = ev_now ();
249		348
250	double dif = ri.diff / ri.pcnt;	349	double dif = ri.diff / ri.pcnt;
251		350
252	bool send = dif > CUTOFF;	351	bool send = dif > NRL_CUTOFF;
253		352
254	if (dif > MAXDIF)	353	if (dif > NRL_MAXDIF)
255	{	354	{
256	ri.pcnt = 1.;	355	ri.pcnt = 1.;
257	ri.diff = MAXDIF;	356	ri.diff = NRL_MAXDIF;
258	}	357	}
259	else if (send)	358	else if (send)
260	ri.pcnt++;	359	ri.pcnt++;
261		360
262	push_front (ri);	361	push_front (ri);
267		366
268	/////////////////////////////////////////////////////////////////////////////	367	/////////////////////////////////////////////////////////////////////////////
269		368
270	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	369	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
271		370
		371	void
272	void hmac_packet::hmac_gen (crypto_ctx *ctx)	372	hmac_packet::hmac_gen (crypto_ctx *ctx)
273	{	373	{
274	unsigned int xlen;	374	unsigned int xlen;
275		375
276	HMAC_CTX *hctx = &ctx->hctx;	376	HMAC_CTX *hctx = &ctx->hctx;
277		377
278	HMAC_Init_ex (hctx, 0, 0, 0, 0);	378	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
279	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	379	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
280	len - sizeof (hmac_packet));	380	len - sizeof (hmac_packet)));
281	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	381	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
282	}	382	}
283		383
284	void	384	void
285	hmac_packet::hmac_set (crypto_ctx *ctx)	385	hmac_packet::hmac_set (crypto_ctx *ctx)
286	{	386	{
…		…
295	hmac_gen (ctx);	395	hmac_gen (ctx);
296		396
297	return !memcmp (hmac, hmac_digest, HMACLENGTH);	397	return !memcmp (hmac, hmac_digest, HMACLENGTH);
298	}	398	}
299		399
		400	void
300	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	401	vpn_packet::set_hdr (ptype type_, unsigned int dst)
301	{	402	{
302	type = type_;	403	type = type_;
303		404
304	int src = THISNODE->id;	405	int src = THISNODE->id;
305		406
…		…
309	}	410	}
310		411
311	#define MAXVPNDATA (MAX_MTU - 6 - 6)	412	#define MAXVPNDATA (MAX_MTU - 6 - 6)
312	#define DATAHDR (sizeof (u32) + RAND_SIZE)	413	#define DATAHDR (sizeof (u32) + RAND_SIZE)
313		414
314	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
315	{	424	{
316	u8 data[MAXVPNDATA + DATAHDR]; // seqno
317
318	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
319	tap_packet unpack (connection conn, u32 &seqno);
320	private:
321
322	const u32 data_hdr_size () const
323	{
324	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	425	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
325	}
326	};	426	}
		427	};
327		428
328	void	429	void
329	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)
330	{	431	{
331	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	432	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
332	int outl = 0, outl2;	433	int outl = 0, outl2;
333	ptype type = PT_DATA_UNCOMPRESSED;	434	ptype type = PT_DATA_UNCOMPRESSED;
334		435
335	#if ENABLE_COMPRESSION	436	#if ENABLE_COMPRESSION
336	u8 cdata[MAX_MTU];	437	u8 cdata[MAX_MTU];
337	u32 cl;
338		438
		439	if (conn->features & FEATURE_COMPRESSION)
		440	{
339	cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	441	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
		442
340	if (cl)	443	if (cl)
341	{	444	{
342	type = PT_DATA_COMPRESSED;	445	type = PT_DATA_COMPRESSED;
343	d = cdata;	446	d = cdata;
344	l = cl + 2;	447	l = cl + 2;
345		448
346	d[0] = cl >> 8;	449	d[0] = cl >> 8;
347	d[1] = cl;	450	d[1] = cl;
		451	}
348	}	452	}
349	#endif	453	#endif
350		454
351	EVP_EncryptInit_ex (cctx, 0, 0, 0, 0);	455	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
352		456
353	struct {	457	struct {
354	#if RAND_SIZE	458	#if RAND_SIZE
355	u8 rnd[RAND_SIZE];	459	u8 rnd[RAND_SIZE];
356	#endif	460	#endif
357	u32 seqno;	461	u32 seqno;
358	} datahdr;	462	} datahdr;
359		463
360	datahdr.seqno = ntohl (seqno);	464	datahdr.seqno = ntohl (seqno);
361	#if RAND_SIZE	465	#if RAND_SIZE
362	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	466	RAND_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);
363	#endif	467	#endif
364		468
365	EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
366	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
367	(unsigned char *) &datahdr, DATAHDR);	471	(unsigned char *) &datahdr, DATAHDR));
368	outl += outl2;	472	outl += outl2;
369		473
370	EVP_EncryptUpdate (cctx,	474	require (EVP_EncryptUpdate (cctx,
371	(unsigned char *) data + outl, &outl2,	475	(unsigned char *) data + outl, &outl2,
372	(unsigned char *) d, l);	476	(unsigned char *) d, l));
373	outl += outl2;	477	outl += outl2;
374		478
375	EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2);	479	require (EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2));
376	outl += outl2;	480	outl += outl2;
377		481
378	len = outl + data_hdr_size ();	482	len = outl + data_hdr_size ();
379		483
380	set_hdr (type, dst);	484	set_hdr (type, dst);
…		…
389	int outl = 0, outl2;	493	int outl = 0, outl2;
390	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
391	u8 *d;	495	u8 *d;
392	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
393		497
394	EVP_DecryptInit_ex (cctx, 0, 0, 0, 0);	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
395		499
396	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
397	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
398		502
399	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
…		…
401	else	505	else
402	#endif	506	#endif
403	d = &(*p)[6 + 6 - DATAHDR];	507	d = &(*p)[6 + 6 - DATAHDR];
404		508
405	/* 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 */
406	EVP_DecryptUpdate (cctx,	510	require (EVP_DecryptUpdate (cctx,
407	d, &outl2,	511	d, &outl2,
408	(unsigned char *)&data, len - data_hdr_size ());	512	(unsigned char *)&data, len - data_hdr_size ()));
409	outl += outl2;	513	outl += outl2;
410		514
411	EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2);	515	require (EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2));
412	outl += outl2;	516	outl += outl2;
413		517
414	seqno = ntohl ((u32 )(d + RAND_SIZE));	518	seqno = ntohl ((u32 )(d + RAND_SIZE));
415		519
416	id2mac (dst () ? dst() : THISNODE->id, p->dst);	520	id2mac (dst () ? dst() : THISNODE->id, p->dst);
…		…
441	}	545	}
442	};	546	};
443		547
444	struct config_packet : vpn_packet	548	struct config_packet : vpn_packet
445	{	549	{
446	// actually, hmaclen cannot be checked because the hmac
447	// field comes before this data, so peers with other
448	// hmacs simply will not work.
449	u8 prot_major, prot_minor, randsize, hmaclen;	550	u8 prot_major, prot_minor, randsize;
450	u8 flags, challengelen, pad2, pad3;	551	u8 flags, features, pad6, pad7, pad8;
451	u32 cipher_nid, digest_nid, hmac_nid;	552	u32 cipher_nid, mac_nid, auth_nid;
452
453	const u8 curflags () const
454	{
455	return 0x80
456	\| (ENABLE_COMPRESSION ? 0x01 : 0x00);
457	}
458		553
459	void setup (ptype type, int dst);	554	void setup (ptype type, int dst);
460	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	}
461	};	571	};
462		572
		573	void
463	void config_packet::setup (ptype type, int dst)	574	config_packet::setup (ptype type, int dst)
464	{	575	{
465	prot_major = PROTOCOL_MAJOR;	576	prot_major = PROTOCOL_MAJOR;
466	prot_minor = PROTOCOL_MINOR;	577	prot_minor = PROTOCOL_MINOR;
467	randsize = RAND_SIZE;	578	randsize = RAND_SIZE;
468	hmaclen = HMACLENGTH;	579	flags = 0;
469	flags = curflags ();	580	features = get_features ();
470	challengelen = sizeof (rsachallenge);
471		581
472	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	582	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
473	digest_nid = htonl (EVP_MD_type (RSA_HASH));
474	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 ()));
475		585
476	len = sizeof (*this) - sizeof (net_packet);	586	len = sizeof (*this) - sizeof (net_packet);
477	set_hdr (type, dst);	587	set_hdr (type, dst);
478	}	588	}
479		589
		590	bool
480	bool config_packet::chk_config () const	591	config_packet::chk_config () const
481	{	592	{
482	if (prot_major != PROTOCOL_MAJOR)	593	if (prot_major != PROTOCOL_MAJOR)
483	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);
484	else if (randsize != RAND_SIZE)	595	else if (randsize != RAND_SIZE)
485	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);
486	else if (hmaclen != HMACLENGTH)
487	slog (L_WARN, _("hmac length mismatch (%d <=> %d)"), hmaclen, HMACLENGTH);
488	else if (flags != curflags ())
489	slog (L_WARN, _("flag mismatch (%x <=> %x)"), flags, curflags ());
490	else if (challengelen != sizeof (rsachallenge))
491	slog (L_WARN, _("challenge length mismatch (%d <=> %d)"), challengelen, sizeof (rsachallenge));
492	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	597	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
493	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 ()));
494	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))
495	slog (L_WARN, _("digest mismatch (%x <=> %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
496	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	599	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
497	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 ()));
498	else	603	else
499	return true;	604	return true;
500		605
501	return false;	606	return false;
502	}	607	}
503		608
504	struct auth_req_packet : config_packet	609	struct auth_req_packet : config_packet // UNPROTECTED
505	{	610	{
506	char magic[8];	611	char magic[8];
507	u8 initiate; // false if this is just an automatic reply	612	u8 initiate; // false if this is just an automatic reply
508	u8 protocols; // supported protocols (will get patches on forward)	613	u8 protocols; // supported protocols (will be patched on forward)
509	u8 pad2, pad3;	614	u8 pad2, pad3;
510	rsaid id;	615	auth_encr encr;
511	rsaencrdata encr;
512		616
513	auth_req_packet (int dst, bool initiate_, u8 protocols_)	617	auth_req_packet (int dst, bool initiate_, u8 protocols_)
514	{	618	{
515	config_packet::setup (PT_AUTH_REQ, dst);	619	config_packet::setup (PT_AUTH_REQ, dst);
516	strncpy (magic, MAGIC, 8);	620	memcpy (magic, MAGIC, 8);
517	initiate = !!initiate_;	621	initiate = !!initiate_;
518	protocols = protocols_;	622	protocols = protocols_;
519		623
520	len = sizeof (*this) - sizeof (net_packet);	624	len = sizeof (*this) - sizeof (net_packet);
521	}	625	}
522	};	626	};
523		627
524	struct auth_res_packet : config_packet	628	struct auth_res_packet : config_packet // UNPROTECTED
525	{	629	{
526	rsaid id;
527	u8 pad1, pad2, pad3;
528	u8 response_len; // encrypted length
529	rsaresponse response;	630	auth_response response;
530		631
531	auth_res_packet (int dst)	632	auth_res_packet (int dst)
532	{	633	{
533	config_packet::setup (PT_AUTH_RES, dst);	634	config_packet::setup (PT_AUTH_RES, dst);
534		635
…		…
568	};	669	};
569		670
570	/////////////////////////////////////////////////////////////////////////////	671	/////////////////////////////////////////////////////////////////////////////
571		672
572	void	673	void
573	connection::connection_established ()	674	connection::connection_established (const sockinfo &rsi)
574	{	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
575	if (ictx && octx)	700	if (ictx && octx)
576	{	701	{
577	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);
578		705
579	rekey.start (NOW + ::conf.rekey);
580	keepalive.start (NOW + ::conf.keepalive);	706	keepalive.start (::conf.keepalive);
581		707
582	// send queued packets	708	// send queued packets
583	if (ictx && octx)	709	if (ictx && octx)
584	{	710	{
585	while (tap_packet p = (tap_packet )data_queue.get ())	711	while (tap_packet p = (tap_packet )data_queue.get ())
586	{	712	{
587	send_data_packet (p);	713	if (p->len) send_data_packet (p);
588	delete p;	714	delete p;
589	}	715	}
590		716
591	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	717	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
592	{	718	{
593	send_vpn_packet (p, si, IPTOS_RELIABILITY);	719	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
594	delete p;	720	delete p;
595	}	721	}
596	}	722	}
		723
		724	vpn->connection_established (this);
597	}	725	}
		726	#if 0
598	else	727	else
599	{	728	{
600	retry_cnt = 0;	729	retry_cnt = 0;
601	establish_connection.start (NOW + 5);	730	establish_connection.start (5);
602	keepalive.reset ();	731	keepalive.stop ();
603	rekey.reset ();	732	rekey.stop ();
604	}	733	}
		734	#endif
605	}	735	}
606		736
607	void	737	void
608	connection::reset_si ()	738	connection::reset_si ()
609	{	739	{
		740	if (vpn->can_direct (THISNODE, conf))
610	protocol = best_protocol (THISNODE->protocols & conf->protocols);	741	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
611		742	else
612	// mask out protocols we cannot establish	743	{
613	if (!conf->udp_port) protocol &= ~PROT_UDPv4;	744	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
614	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;	745	protocol = 0;
		746	}
615		747
616	si.set (conf, protocol);	748	si.set (conf, protocol);
		749
		750	is_direct = si.valid ();
617	}	751	}
618		752
619	// ensure sockinfo is valid, forward if necessary	753	// ensure sockinfo is valid, forward if necessary
620	const sockinfo &	754	const sockinfo &
621	connection::forward_si (const sockinfo &si) const	755	connection::forward_si (const sockinfo &si) const
622	{	756	{
623	if (!si.valid ())	757	if (!si.valid ())
624	{	758	{
625	connection *r = vpn->find_router ();	759	connection *r = vpn->find_router_for (this);
626		760
627	if (r)	761	if (r)
628	{	762	{
629	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"),	763	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
630	conf->nodename, r->conf->nodename);	764	conf->nodename, r->conf->nodename);
631	return r->si;	765	return r->si;
632	}	766	}
633	else	767	else
634	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	768	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
635	conf->nodename);	769	conf->nodename);
636	}	770	}
637		771
638	return si;	772	return si;
639	}	773	}
…		…
649	connection::send_ping (const sockinfo &si, u8 pong)	783	connection::send_ping (const sockinfo &si, u8 pong)
650	{	784	{
651	ping_packet *pkt = new ping_packet;	785	ping_packet *pkt = new ping_packet;
652		786
653	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);
654	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	790	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
655		791
656	delete pkt;	792	delete pkt;
657	}	793	}
658		794
…		…
673	void	809	void
674	connection::send_auth_request (const sockinfo &si, bool initiate)	810	connection::send_auth_request (const sockinfo &si, bool initiate)
675	{	811	{
676	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);
677		813
678	rsachallenge chg;	814	generate_auth_data ();
		815	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
679		816
680	rsa_cache.gen (pkt->id, chg);
681
682	if (0 > RSA_public_encrypt (sizeof chg,
683	(unsigned char )&chg, (unsigned char )&pkt->encr,
684	conf->rsa_key, RSA_PKCS1_OAEP_PADDING))
685	fatal ("RSA_public_encrypt error");
686
687	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);
688
689	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
690		819
691	delete pkt;	820	delete pkt;
692	}	821	}
693		822
694	void	823	void
695	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	824	connection::send_auth_response (const sockinfo &si)
696	{	825	{
697	auth_res_packet *pkt = new auth_res_packet (conf->id);	826	auth_res_packet *pkt = new auth_res_packet (conf->id);
698		827
699	pkt->id = id;	828	auth_hash (rcv_auth, pkt->response.mac);
		829	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
700		830
701	rsa_hash (id, chg, pkt->response);
702
703	pkt->hmac_set (octx);
704
705	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);
706
707	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
708		833
709	delete pkt;	834	delete pkt;
710	}	835	}
711		836
712	void	837	void
713	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	838	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
714	{	839	{
715	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	840	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
716	conf->id, rid, (const char *)rsi);	841	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		842	conf->protocols);
717		843
718	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);
719		845
720	r->hmac_set (octx);	846	r->hmac_set (octx);
721	send_vpn_packet (r, si);	847	send_vpn_packet (r, si);
722		848
723	delete r;	849	delete r;
724	}	850	}
725		851
726	void	852	inline void
727	connection::establish_connection_cb (time_watcher &w)	853	connection::establish_connection_cb (ev::timer &w, int revents)
728	{	854	{
729	if (ictx \|\| conf == THISNODE	855	if (!(ictx && octx)
		856	&& conf != THISNODE
730	\|\| connectmode == conf_node::C_NEVER	857	&& connectmode != conf_node::C_NEVER
731	\|\| connectmode == conf_node::C_DISABLED)	858	&& connectmode != conf_node::C_DISABLED
732	w.at = TSTAMP_CANCEL;	859	&& !w.is_active ())
733	else if (w.at <= NOW)
734	{	860	{
735	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
736		862	// and stop trying. should probably be handled by a per-connection expire handler.
737	if (retry_int < 3600 * 8)	863	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		864	{
		865	reset_connection ();
738	retry_cnt++;	866	return;
		867	}
739		868
740	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));
741		874
742	reset_si ();	875	reset_si ();
743		876
744	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);
745	vpn->send_connect_request (conf->id);	883	vpn->send_connect_request (this);
		884	}
746	else	885	else
747	{	886	{
		887	if (si.valid ())
		888	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		889	conf->nodename, (const char *)si);
		890
748	const sockinfo &dsi = forward_si (si);	891	const sockinfo &dsi = forward_si (si);
		892
		893	slow = slow \|\| (dsi.prot & PROT_SLOW);
749		894
750	if (dsi.valid () && auth_rate_limiter.can (dsi))	895	if (dsi.valid () && auth_rate_limiter.can (dsi))
751	{	896	{
752	if (retry_cnt < 4)	897	if (retry_cnt < 4)
753	send_auth_request (dsi, true);	898	send_auth_request (dsi, true);
754	else	899	else
755	send_ping (dsi, 0);	900	send_ping (dsi, 0);
756	}	901	}
757	}	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);
758	}	912	}
759	}	913	}
760		914
761	void	915	void
762	connection::reset_connection ()	916	connection::reset_connection ()
…		…
765	{	919	{
766	slog (L_INFO, _("%s(%s): connection lost"),	920	slog (L_INFO, _("%s(%s): connection lost"),
767	conf->nodename, (const char *)si);	921	conf->nodename, (const char *)si);
768		922
769	if (::conf.script_node_down)	923	if (::conf.script_node_down)
770	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	}
771	}	929	}
772		930
773	delete ictx; ictx = 0;	931	delete ictx; ictx = 0;
774	delete octx; octx = 0;	932	delete octx; octx = 0;
775		933
776	si.host= 0;	934	si.host = 0;
777		935
		936	have_snd_auth = false;
		937	have_rcv_auth = false;
		938	auth_expire = 0.;
		939
778	last_activity = 0;	940	last_activity = 0.;
		941	//last_si_change = 0.;
779	retry_cnt = 0;	942	retry_cnt = 0;
780		943
781	rekey.reset ();	944	rekey.stop ();
782	keepalive.reset ();	945	keepalive.stop ();
783	establish_connection.reset ();	946	establish_connection.stop ();
784	}	947	}
785		948
786	void	949	void
787	connection::shutdown ()	950	connection::shutdown ()
788	{	951	{
…		…
790	send_reset (si);	953	send_reset (si);
791		954
792	reset_connection ();	955	reset_connection ();
793	}	956	}
794		957
795	void	958	// poor-man's rekeying
796	connection::rekey_cb (time_watcher &w)	959	inline void
		960	connection::rekey_cb (ev::timer &w, int revents)
797	{	961	{
798	w.at = TSTAMP_CANCEL;
799
800	reset_connection ();	962	reset_connection ();
801	establish_connection ();	963	establish_connection ();
802	}	964	}
803		965
804	void	966	void
…		…
819	if (oseqno > MAX_SEQNO)	981	if (oseqno > MAX_SEQNO)
820	rekey ();	982	rekey ();
821	}	983	}
822		984
823	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
824	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	996	connection::inject_data_packet (tap_packet *pkt)
825	{	997	{
826	if (ictx && octx)	998	if (ictx && octx)
827	send_data_packet (pkt);	999	send_data_packet (pkt);
828	else	1000	else
829	{	1001	{
830	if (!broadcast)//DDDD
831	data_queue.put (new tap_packet (*pkt));	1002	data_queue.put (new tap_packet (*pkt));
832		1003	post_inject_queue ();
833	establish_connection ();
834	}	1004	}
835	}	1005	}
836		1006
		1007	void
837	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1008	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
838	{	1009	{
839	if (ictx && octx)	1010	if (ictx && octx)
840	send_vpn_packet (pkt, si, tos);	1011	send_vpn_packet (pkt, si, tos);
841	else	1012	else
842	{	1013	{
843	vpn_queue.put (new vpn_packet (*pkt));	1014	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
844		1015	post_inject_queue ();
845	establish_connection ();
846	}	1016	}
847	}	1017	}
848		1018
849	void	1019	void
850	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1020	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
851	{	1021	{
852	last_activity = NOW;	1022	last_activity = ev_now ();
853		1023
854	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.",
855	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;
856		1029
857	switch (pkt->typ ())	1030	switch (pkt->typ ())
858	{	1031	{
859	case vpn_packet::PT_PING:	1032	case vpn_packet::PT_PING:
		1033	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1034
860	// we send pings instead of auth packets after some retries,	1035	// we send pings instead of auth packets after some retries,
861	// so reset the retry counter and establish a connection	1036	// so reset the retry counter and establish a connection
862	// when we receive a ping.	1037	// when we receive a ping.
863	if (!ictx)	1038	if (!ictx)
864	{	1039	{
865	if (auth_rate_limiter.can (rsi))	1040	if (auth_rate_limiter.can (rsi))
866	send_auth_request (rsi, true);	1041	send_auth_request (rsi, true);
867	}	1042	}
868	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.
869	send_ping (rsi, 1); // pong	1046	send_ping (rsi, 1); // pong
870		1047
871	break;	1048	break;
872		1049
873	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 ();
874	break;	1056	break;
875		1057
876	case vpn_packet::PT_RESET:	1058	case vpn_packet::PT_RESET:
877	{	1059	{
878	reset_connection ();	1060	reset_connection ();
879		1061
880	config_packet p = (config_packet ) pkt;	1062	config_packet p = (config_packet ) pkt;
881		1063
882	if (!p->chk_config ())	1064	if (!p->chk_config ())
883	{	1065	{
884	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1066	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
885	conf->nodename, (const char *)rsi);	1067	conf->nodename, (const char *)rsi);
886	connectmode = conf_node::C_DISABLED;	1068	connectmode = conf_node::C_DISABLED;
887	}	1069	}
888	else if (connectmode == conf_node::C_ALWAYS)	1070	else if (connectmode == conf_node::C_ALWAYS)
889	establish_connection ();	1071	establish_connection ();
…		…
891	break;	1073	break;
892		1074
893	case vpn_packet::PT_AUTH_REQ:	1075	case vpn_packet::PT_AUTH_REQ:
894	if (auth_rate_limiter.can (rsi))	1076	if (auth_rate_limiter.can (rsi))
895	{	1077	{
896	auth_req_packet p = (auth_req_packet ) pkt;	1078	auth_req_packet p = (auth_req_packet )pkt;
897		1079
898	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);
899		1083
900	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1084	if (p->chk_config () && !memcmp (p->magic, MAGIC, 8))
901	{	1085	{
902	if (p->prot_minor != PROTOCOL_MINOR)	1086	if (p->prot_minor != PROTOCOL_MINOR)
903	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."),
904	conf->nodename, (const char *)rsi,	1088	conf->nodename, (const char *)rsi,
905	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1089	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
906		1090
907	if (p->initiate)	1091	if (p->initiate)
908	send_auth_request (rsi, false);	1092	send_auth_request (rsi, false);
909		1093
910	rsachallenge k;	1094	auth_data auth;
911		1095
912	if (0 > RSA_private_decrypt (sizeof (p->encr),	1096	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
913	(unsigned char )&p->encr, (unsigned char )&k,	1097	{
914	::conf.rsa_key, RSA_PKCS1_OAEP_PADDING))
915	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?"),
916	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	}
917	else	1101	else
918	{	1102	{
919	delete octx;	1103	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
920		1104
921	octx = new crypto_ctx (k, 1);	1105	rcv_auth = auth;
922	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1106	have_rcv_auth = true;
923		1107
		1108	send_auth_response (rsi);
		1109
		1110	if (chg)
		1111	{
924	conf->protocols = p->protocols;	1112	conf->protocols = p->protocols;
		1113	features = p->features & config_packet::get_features ();
925		1114
926	send_auth_response (rsi, p->id, k);
927
928	connection_established ();	1115	connection_established (rsi);
929
930	break;	1116	}
931	}	1117	}
		1118
		1119	break;
932	}	1120	}
933	else	1121	else
934	slog (L_WARN, _("%s(%s): protocol mismatch"),	1122	slog (L_WARN, _("%s(%s): protocol mismatch."),
935	conf->nodename, (const char *)rsi);	1123	conf->nodename, (const char *)rsi);
936		1124
937	send_reset (rsi);	1125	send_reset (rsi);
938	}	1126	}
939		1127
940	break;	1128	break;
941		1129
942	case vpn_packet::PT_AUTH_RES:	1130	case vpn_packet::PT_AUTH_RES:
943	{	1131	{
944	auth_res_packet p = (auth_res_packet ) pkt;	1132	auth_res_packet p = (auth_res_packet )pkt;
945		1133
946	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1134	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
947		1135
948	if (p->chk_config ())	1136	if (p->chk_config ())
949	{	1137	{
950	if (p->prot_minor != PROTOCOL_MINOR)	1138	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
951	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
952	conf->nodename, (const char *)rsi,
953	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
954
955	rsachallenge chg;
956
957	if (!rsa_cache.find (p->id, chg))
958	{	1139	{
959	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1140	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
960	conf->nodename, (const char *)rsi);	1141	conf->nodename, (const char *)rsi);
961	break;
962	}	1142	}
963	else	1143	else if (!have_snd_auth)
964	{	1144	{
965	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1145	if (p->prot_minor != PROTOCOL_MINOR)
966		1146	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
967	if (!p->hmac_chk (cctx))
968	{
969	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
970	"could be an attack, or just corruption or an synchronization error"),
971	conf->nodename, (const char *)rsi);	1147	conf->nodename, (const char *)rsi,
972	break;	1148	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
973	}
974	else
975	{
976	rsaresponse h;
977		1149
978	rsa_hash (p->id, chg, h);
979
980	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
981	{
982	prot_minor = p->prot_minor;	1150	prot_minor = p->prot_minor;
		1151	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
983		1152
984	delete ictx; ictx = cctx;	1153	have_snd_auth = true;
985
986	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
987
988	si = rsi;
989	protocol = rsi.prot;
990
991	connection_established ();	1154	connection_established (rsi);
992
993	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
994	conf->nodename, (const char *)rsi,
995	p->prot_major, p->prot_minor);
996
997	if (::conf.script_node_up)
998	run_script (run_script_cb (this, &connection::script_node_up), false);
999
1000	break;
1001	}
1002	else
1003	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1004	conf->nodename, (const char *)rsi);
1005	}
1006
1007	delete cctx;
1008	}	1155	}
		1156
		1157	break;
1009	}	1158	}
1010	}	1159	}
1011		1160
1012	send_reset (rsi);	1161	send_reset (rsi);
1013	break;	1162	break;
…		…
1024	{	1173	{
1025	vpndata_packet p = (vpndata_packet )pkt;	1174	vpndata_packet p = (vpndata_packet )pkt;
1026		1175
1027	if (!p->hmac_chk (ictx))	1176	if (!p->hmac_chk (ictx))
1028	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"
1029	"could be an attack, or just corruption or an synchronization error"),	1178	"could be an attack, or just corruption or a synchronization error."),
1030	conf->nodename, (const char *)rsi);	1179	conf->nodename, (const char *)rsi);
1031	else	1180	else
1032	{	1181	{
1033	u32 seqno;	1182	u32 seqno;
1034	tap_packet *d = p->unpack (this, seqno);	1183	tap_packet *d = p->unpack (this, seqno);
		1184	int seqclass = iseqno.seqno_classify (seqno);
1035		1185
1036	if (iseqno.recv_ok (seqno))	1186	if (seqclass == 0) // ok
1037	{	1187	{
1038	vpn->tap->send (d);	1188	vpn->tap->send (d);
1039		1189
1040	if (si != rsi)	1190	if (si != rsi)
1041	{	1191	{
1042	// 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.)
1043	si = rsi;	1194	// {
1044
1045	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1195	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1046	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);
1047	}	1211	}
1048
1049	delete d;
1050
1051	break;
1052	}	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;
1053	}	1228	}
1054	}	1229	}
1055		1230
1056	send_reset (rsi);	1231	send_reset (rsi);
1057	break;	1232	break;
1058		1233
1059	case vpn_packet::PT_CONNECT_REQ:	1234	case vpn_packet::PT_CONNECT_REQ:
1060	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1235	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1061	{	1236	{
1062	connect_req_packet p = (connect_req_packet ) pkt;	1237	connect_req_packet p = (connect_req_packet )pkt;
1063		1238
1064	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 ())
1065	connection *c = vpn->conns[p->id - 1];
1066	conf->protocols = p->protocols;
1067
1068	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1069	conf->id, p->id, c->ictx && c->octx);
1070
1071	if (c->ictx && c->octx)
1072	{	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	{
1073	// send connect_info packets to both sides, in case one is	1251	// send connect_info packets to both sides, in case one is
1074	// behind a nat firewall (or both ;)	1252	// behind a nat firewall (or both ;)
1075	c->send_connect_info (conf->id, si, conf->protocols);	1253	c->send_connect_info (conf->id, si, conf->protocols);
1076	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 ();
1077	}	1258	}
1078	else	1259	else
1079	c->establish_connection ();	1260	slog (L_WARN,
		1261	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1262	p->id);
1080	}	1263	}
1081		1264
1082	break;	1265	break;
1083		1266
1084	case vpn_packet::PT_CONNECT_INFO:	1267	case vpn_packet::PT_CONNECT_INFO:
1085	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1268	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1086	{	1269	{
1087	connect_info_packet p = (connect_info_packet ) pkt;	1270	connect_info_packet p = (connect_info_packet )pkt;
1088		1271
1089	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 ())
1090		1273	{
1091	connection *c = vpn->conns[p->id - 1];	1274	connection *c = vpn->conns[p->id - 1];
1092		1275
1093	c->conf->protocols = p->protocols;	1276	c->conf->protocols = p->protocols;
1094	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));
1095	p->si.upgrade_protocol (protocol, c->conf);	1278	p->si.upgrade_protocol (protocol, c->conf);
1096		1279
1097	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]",
1098	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);
1099		1288
1100	const sockinfo &dsi = forward_si (p->si);	1289	const sockinfo &dsi = forward_si (p->si);
1101		1290
1102	if (dsi.valid ())	1291	if (dsi.valid ())
1103	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);
1104	}	1302	}
1105		1303
1106	break;	1304	break;
1107		1305
1108	default:	1306	default:
1109	send_reset (rsi);	1307	send_reset (rsi);
1110	break;	1308	break;
1111	}	1309	}
1112	}	1310	}
1113		1311
1114	void connection::keepalive_cb (time_watcher &w)	1312	inline void
		1313	connection::keepalive_cb (ev::timer &w, int revents)
1115	{	1314	{
1116	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)
1117	{	1320	{
1118	reset_connection ();	1321	reset_connection ();
1119	establish_connection ();	1322	establish_connection ();
1120	}	1323	}
1121	else if (NOW < last_activity + ::conf.keepalive)
1122	w.at = last_activity + ::conf.keepalive;
1123	else if (conf->connectmode != conf_node::C_ONDEMAND	1324	else if (conf->connectmode != conf_node::C_ONDEMAND
1124	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1325	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1125	{	1326	{
		1327	w.start (3);
1126	send_ping (si);	1328	send_ping (si);
1127	w.at = NOW + 5;
1128	}	1329	}
1129	else if (NOW < last_activity + ::conf.keepalive + 10)	1330	else if (when >= -10)
1130	// hold ondemand connections implicitly a few seconds longer	1331	// hold ondemand connections implicitly a few seconds longer
1131	// should delete octx, though, or something like that ;)	1332	// should delete octx, though, or something like that ;)
1132	w.at = last_activity + ::conf.keepalive + 10;	1333	w.start (when + 10);
1133	else	1334	else
1134	reset_connection ();	1335	reset_connection ();
1135	}	1336	}
1136		1337
		1338	void
1137	void connection::send_connect_request (int id)	1339	connection::send_connect_request (int id)
1138	{	1340	{
1139	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);
1140		1342
1141	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);
1142	p->hmac_set (octx);	1346	p->hmac_set (octx);
1143	send_vpn_packet (p, si);	1347	send_vpn_packet (p, si);
1144		1348
1145	delete p;	1349	delete p;
1146	}	1350	}
1147		1351
1148	void connection::script_node ()	1352	void
		1353	connection::script_init_env (const char *ext)
1149	{	1354	{
1150	vpn->script_if_up ();
1151
1152	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;
1153	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);
1154	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1371	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1155	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1372	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1156	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1373	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1157	}	1374	}
1158		1375
		1376	inline const char *
1159	const char *connection::script_node_up ()	1377	connection::script_node_up ()
1160	{	1378	{
1161	script_node ();	1379	script_init_connect_env ();
1162		1380
1163	putenv ("STATE=up");	1381	putenv ((char *)"STATE=up");
1164		1382
		1383	char *filename;
		1384	asprintf (&filename,
		1385	"%s/%s",
		1386	confbase,
1165	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1387	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1166	}
1167		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 *
1168	const char *connection::script_node_down ()	1409	connection::script_node_down ()
1169	{	1410	{
1170	script_node ();	1411	script_init_connect_env ();
1171		1412
1172	putenv ("STATE=down");	1413	putenv ((char *)"STATE=down");
1173		1414
1174	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1415	char *filename;
1175	}	1416	asprintf (&filename,
		1417	"%s/%s",
		1418	confbase,
		1419	::conf.script_node_down ? ::conf.script_node_down : "node-down");
1176		1420
		1421	return filename;
		1422	}
		1423
1177	connection::connection(struct vpn *vpn_)	1424	connection::connection (struct vpn vpn, conf_node conf)
1178	: vpn(vpn_)	1425	: vpn(vpn), conf(conf),
1179	, rekey (this, &connection::rekey_cb)	1426	#if ENABLE_DNS
1180	, 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);
1181	, establish_connection (this, &connection::establish_connection_cb)	1434	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1182	{	1435
		1436	last_establish_attempt = 0.;
1183	octx = ictx = 0;	1437	octx = ictx = 0;
1184	retry_cnt = 0;
1185		1438
1186	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
1187	reset_connection ();	1445	reset_connection ();
1188	}	1446	}
1189		1447
1190	connection::~connection ()	1448	connection::~connection ()
1191	{	1449	{
1192	shutdown ();	1450	shutdown ();
1193	}	1451	}
1194		1452
		1453	void
1195	void connection_init ()	1454	connection_init ()
1196	{	1455	{
1197	auth_rate_limiter.clear ();	1456	auth_rate_limiter.clear ();
1198	reset_rate_limiter.clear ();	1457	reset_rate_limiter.clear ();
1199	}	1458	}
1200		1459

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Comparing gvpe/src/connection.C (file contents): Revision 1.21 by pcg, Thu Oct 16 02:28:36 2003 UTC vs. Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC

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Comparing gvpe/src/connection.C (file contents):
Revision 1.21 by pcg, Thu Oct 16 02:28:36 2003 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC