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

Comparing gvpe/src/connection.C (file contents):
Revision 1.64 by pcg, Tue Dec 4 15:01:12 2007 UTC vs.
Revision 1.109 by root, Fri Oct 11 07:56:07 2013 UTC

…		…
1	/*	1	/*
2	connection.C -- manage a single connection	2	connection.C -- manage a single connection
3	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
5	This file is part of GVPE.	5	This file is part of GVPE.
6		6
7	GVPE is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
8	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
9	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
10	(at your option) any later version.	10	option) any later version.
11		11
12	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15	GNU General Public License for more details.	15	Public License for more details.
16		16
17	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
18	along with gvpe; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
19	Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <list>	34	#include <list>
		35	#include <queue>
		36	#include <utility>
25		37
		38	#include <openssl/opensslv.h>
26	#include <openssl/rand.h>	39	#include <openssl/rand.h>
27	#include <openssl/evp.h>	40	#include <openssl/evp.h>
28	#include <openssl/rsa.h>	41	#include <openssl/rsa.h>
29	#include <openssl/err.h>	42	#include <openssl/err.h>
		43
		44	// openssl 0.9.8 compatibility
		45	#if OPENSSL_VERSION_NUMBER < 0x10100000
		46	#define require101(exp) exp
		47	#else
		48	#define require101(exp) equire (exp)
		49	#endif
30		50
31	#include "conf.h"	51	#include "conf.h"
32	#include "slog.h"	52	#include "slog.h"
33	#include "device.h"	53	#include "device.h"
34	#include "vpn.h"	54	#include "vpn.h"
35	#include "connection.h"	55	#include "connection.h"
		56	#include "hkdf.h"
36		57
37	#include "netcompat.h"	58	#include "netcompat.h"
38		59
39	#if !HAVE_RAND_PSEUDO_BYTES
40	# define RAND_pseudo_bytes RAND_bytes
41	#endif
42
43	#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic	60	#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic
		61	#define MAGIC "HUHN\xbd\xc6\xdb\x82" // 8 bytes of magic//D
44		62
45	#define ULTRA_FAST 1	63	#define ULTRA_FAST 1
46	#define HLOG 15	64	#define HLOG 15
47	#include "lzf/lzf.h"	65	#include "lzf/lzf.h"
48	#include "lzf/lzf_c.c"	66	#include "lzf/lzf_c.c"
49	#include "lzf/lzf_d.c"	67	#include "lzf/lzf_d.c"
50		68
		69	//////////////////////////////////////////////////////////////////////////////
		70
		71	static std::queue< std::pair<run_script_cb , const char > > rs_queue;
		72	static ev::child rs_child_ev;
		73
		74	namespace
		75	{
		76	void // c++ requires external linkage here, apparently :(
		77	rs_child_cb (ev::child &w, int revents)
		78	{
		79	w.stop ();
		80
		81	if (rs_queue.empty ())
		82	return;
		83
		84	pid_t pid = run_script (*rs_queue.front ().first, false);
		85	if (pid)
		86	{
		87	w.set (pid);
		88	w.start ();
		89	}
		90	else
		91	slog (L_WARN, rs_queue.front ().second);
		92
		93	delete rs_queue.front ().first;
		94	rs_queue.pop ();
		95	}
		96	};
		97
		98	// despite the fancy name, this is quite a hack
		99	static void
		100	run_script_queued (run_script_cb cb, const char warnmsg)
		101	{
		102	rs_queue.push (std::make_pair (cb, warnmsg));
		103
		104	if (!rs_child_ev.is_active ())
		105	{
		106	rs_child_ev.set<rs_child_cb> ();
		107	rs_child_ev ();
		108	}
		109	}
		110
		111	//////////////////////////////////////////////////////////////////////////////
		112
51	struct crypto_ctx	113	struct crypto_ctx
52	{	114	{
53	EVP_CIPHER_CTX cctx;	115	EVP_CIPHER_CTX cctx;
54	HMAC_CTX hctx;	116	HMAC_CTX hctx;
55		117
56	crypto_ctx (const rsachallenge &challenge, int enc);	118	crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc);
57	~crypto_ctx ();	119	~crypto_ctx ();
58	};	120	};
59		121
60	crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc)	122	crypto_ctx::crypto_ctx (const auth_data &auth1, const auth_data &auth2, const ecdh_key &a, const ecdh_key &b, int enc)
61	{	123	{
		124	ecdh_key s;
		125
		126	curve25519_combine (a, b, s);
		127
		128	{
		129	u8 mac_key[MAC_KEYSIZE];
		130	static const unsigned char mac_info[] = "gvpe mac key";
		131
		132	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		133	kdf.extract (auth1.rsa.mac_key, sizeof (auth1.rsa.mac_key));
		134	kdf.extract (s, sizeof (s));
		135	kdf.extract_done (HKDF_PRF_HASH ());
		136	kdf.expand (mac_key, sizeof (mac_key), mac_info, sizeof (mac_info));
		137
		138	HMAC_CTX_init (&hctx);
		139	require101 (HMAC_Init_ex (&hctx, mac_key, MAC_KEYSIZE, MAC_DIGEST (), 0));
		140	}
		141
		142	{
		143	u8 cipher_key[CIPHER_KEYSIZE];
		144	static const unsigned char cipher_info[] = "gvpe cipher key";
		145
		146	hkdf kdf (auth2.rsa.hkdf_salt, sizeof (auth2.rsa.hkdf_salt), HKDF_XTR_HASH ());
		147	kdf.extract (auth1.rsa.cipher_key, sizeof (auth1.rsa.cipher_key));
		148	kdf.extract (s, sizeof (s));
		149	kdf.extract_done (HKDF_PRF_HASH ());
		150	kdf.expand (cipher_key, sizeof (cipher_key), cipher_info, sizeof (cipher_info));
		151
62	EVP_CIPHER_CTX_init (&cctx);	152	EVP_CIPHER_CTX_init (&cctx);
63	require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc));	153	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
64	HMAC_CTX_init (&hctx);	154	}
65	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
66	}	155	}
67		156
68	crypto_ctx::~crypto_ctx ()	157	crypto_ctx::~crypto_ctx ()
69	{	158	{
70	require (EVP_CIPHER_CTX_cleanup (&cctx));	159	require (EVP_CIPHER_CTX_cleanup (&cctx));
71	HMAC_CTX_cleanup (&hctx);	160	HMAC_CTX_cleanup (&hctx);
72	}	161	}
73		162
		163	static inline void
		164	auth_encrypt (RSA *key, const auth_data &auth, auth_encr &encr)
		165	{
		166	if (RSA_public_encrypt (sizeof (auth.rsa),
		167	(unsigned char )&auth.rsa, (unsigned char )&encr.rsa,
		168	key, RSA_PKCS1_OAEP_PADDING) < 0)
		169	fatal ("RSA_public_encrypt error");
		170
		171	memcpy (&encr.ecdh, &auth.ecdh, sizeof (encr.ecdh));
		172	}
		173
		174	static inline bool
		175	auth_decrypt (RSA *key, const auth_encr &encr, auth_data &auth)
		176	{
		177	u8 rsa_decrypt[RSA_KEYLEN];
		178
		179	if (RSA_private_decrypt (sizeof (encr.rsa),
		180	(const unsigned char )&encr.rsa, (unsigned char )rsa_decrypt,
		181	key, RSA_PKCS1_OAEP_PADDING) != sizeof (auth.rsa))
		182	return 0;
		183
		184	memcpy (&auth.rsa, rsa_decrypt, sizeof (auth.rsa));
		185	memcpy (&auth.ecdh, &encr.ecdh, sizeof (auth.ecdh));
		186
		187	return 1;
		188	}
		189
74	static void	190	static void
75	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	191	auth_hash (const auth_data &auth, const ecdh_key &b, auth_mac &mac)
76	{	192	{
77	EVP_MD_CTX ctx;	193	hkdf kdf (b, sizeof b, AUTH_DIGEST ()); // use response ecdh b as salt
78		194	kdf.extract (&auth.rsa, sizeof (auth.rsa));
79	EVP_MD_CTX_init (&ctx);	195	kdf.extract_done ();
80	require (EVP_DigestInit (&ctx, RSA_HASH));	196	kdf.expand (mac, sizeof mac, auth.ecdh, sizeof (auth.ecdh)); // use challenge ecdh b as info
81	require (EVP_DigestUpdate(&ctx, &chg, sizeof chg));
82	require (EVP_DigestUpdate(&ctx, &id, sizeof id));
83	require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
84	EVP_MD_CTX_cleanup (&ctx);
85	}	197	}
86		198
87	struct rsa_entry	199	void
		200	connection::generate_auth_data ()
88	{	201	{
89	tstamp expire;	202	if (auth_expire < ev_now ())
90	rsaid id;
91	rsachallenge chg;
92	};
93
94	struct rsa_cache : list<rsa_entry>
95	{
96	void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;
97
98	bool find (const rsaid &id, rsachallenge &chg)
99	{
100	for (iterator i = begin (); i != end (); ++i)
101	{	203	{
102	if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev_now ())	204	// request data
103	{	205	rand_fill (snd_auth.rsa);
104	memcpy (&chg, &i->chg, sizeof chg);	206	curve25519_generate (snd_ecdh_a, snd_auth.ecdh);
105		207
106	erase (i);	208	// eventual response data
107	return true;	209	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
108	}
109	}	210	}
110		211
111	if (!cleaner.is_active ())	212	// every use prolongs the expiry
112	cleaner.again ();
113
114	return false;
115	}
116
117	void gen (rsaid &id, rsachallenge &chg)
118	{
119	rsa_entry e;
120
121	RAND_bytes ((unsigned char *)&id, sizeof id);
122	RAND_bytes ((unsigned char *)&chg, sizeof chg);
123
124	e.expire = ev_now () + RSA_TTL;	213	auth_expire = ev_now () + AUTH_TTL;
125	e.id = id;
126	memcpy (&e.chg, &chg, sizeof chg);
127
128	push_back (e);
129
130	if (!cleaner.is_active ())
131	cleaner.again ();
132	}
133
134	rsa_cache ()
135	: cleaner (this, &rsa_cache::cleaner_cb)
136	{
137	cleaner.set (RSA_TTL, RSA_TTL);
138	}
139
140	} rsa_cache;
141
142	void rsa_cache::cleaner_cb (ev::timer &w, int revents)
143	{
144	if (empty ())
145	w.stop ();
146	else
147	{
148	for (iterator i = begin (); i != end (); )
149	if (i->expire <= ev_now ())
150	i = erase (i);
151	else
152	++i;
153	}
154	}	214	}
155		215
156	//////////////////////////////////////////////////////////////////////////////	216	//////////////////////////////////////////////////////////////////////////////
157		217
158	void pkt_queue::put (net_packet *p)	218	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		219	: max_ttl (max_ttl), max_queue (max_queue)
159	{	220	{
160	if (queue[i])	221	queue = new pkt [max_queue];
161	{
162	delete queue[i];
163	j = (j + 1) % QUEUEDEPTH;
164	}
165		222
166	queue[i] = p;
167
168	i = (i + 1) % QUEUEDEPTH;
169	}
170
171	net_packet *pkt_queue::get ()
172	{
173	net_packet *p = queue[j];
174
175	if (p)
176	{
177	queue[j] = 0;
178	j = (j + 1) % QUEUEDEPTH;
179	}
180
181	return p;
182	}
183
184	pkt_queue::pkt_queue ()
185	{
186	memset (queue, 0, sizeof (queue));
187	i = 0;	223	i = 0;
188	j = 0;	224	j = 0;
		225
		226	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
189	}	227	}
190		228
191	pkt_queue::~pkt_queue ()	229	pkt_queue::~pkt_queue ()
192	{	230	{
193	for (i = QUEUEDEPTH; --i > 0; )	231	while (net_packet *p = get ())
		232	delete p;
		233
194	delete queue[i];	234	delete [] queue;
		235	}
		236
		237	void
		238	pkt_queue::expire_cb (ev::timer &w, int revents)
		239	{
		240	ev_tstamp expire = ev_now () - max_ttl;
		241
		242	for (;;)
		243	{
		244	if (empty ())
		245	break;
		246
		247	double diff = queue[j].tstamp - expire;
		248
		249	if (diff >= 0.)
		250	{
		251	w.start (diff > 0.5 ? diff : 0.5);
		252	break;
		253	}
		254
		255	delete get ();
		256	}
		257	}
		258
		259	void
		260	pkt_queue::put (net_packet *p)
		261	{
		262	ev_tstamp now = ev_now ();
		263
		264	// start expiry timer
		265	if (empty ())
		266	expire.start (max_ttl);
		267
		268	int ni = i + 1 == max_queue ? 0 : i + 1;
		269
		270	if (ni == j)
		271	delete get ();
		272
		273	queue[i].pkt = p;
		274	queue[i].tstamp = now;
		275
		276	i = ni;
		277	}
		278
		279	net_packet *
		280	pkt_queue::get ()
		281	{
		282	if (empty ())
		283	return 0;
		284
		285	net_packet *p = queue[j].pkt;
		286	queue[j].pkt = 0;
		287
		288	j = j + 1 == max_queue ? 0 : j + 1;
		289
		290	return p;
195	}	291	}
196		292
197	struct net_rateinfo	293	struct net_rateinfo
198	{	294	{
199	u32 host;	295	u32 host;
213		309
214	bool can (const sockinfo &si) { return can((u32)si.host); }	310	bool can (const sockinfo &si) { return can((u32)si.host); }
215	bool can (u32 host);	311	bool can (u32 host);
216	};	312	};
217		313
218	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	314	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
219		315
		316	bool
220	bool net_rate_limiter::can (u32 host)	317	net_rate_limiter::can (u32 host)
221	{	318	{
222	iterator i;	319	iterator i;
223		320
224	for (i = begin (); i != end (); )	321	for (i = begin (); i != end (); )
225	if (i->host == host)	322	if (i->host == host)
…		…
270	}	367	}
271	}	368	}
272		369
273	/////////////////////////////////////////////////////////////////////////////	370	/////////////////////////////////////////////////////////////////////////////
274		371
275	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	372	void
276
277	void hmac_packet::hmac_gen (crypto_ctx *ctx)	373	hmac_packet::hmac_gen (crypto_ctx ctx, u8 hmac_digest)
278	{	374	{
279	unsigned int xlen;
280
281	HMAC_CTX *hctx = &ctx->hctx;	375	HMAC_CTX *hctx = &ctx->hctx;
282		376
283	HMAC_Init_ex (hctx, 0, 0, 0, 0);	377	require101 (HMAC_Init_ex (hctx, 0, 0, 0, 0));
284	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	378	require101 (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), len - sizeof (hmac_packet)));
285	len - sizeof (hmac_packet));	379	require101 (HMAC_Final (hctx, hmac_digest, 0));
286	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);
287	}	380	}
288		381
289	void	382	void
290	hmac_packet::hmac_set (crypto_ctx *ctx)	383	hmac_packet::hmac_set (crypto_ctx *ctx)
291	{	384	{
292	hmac_gen (ctx);	385	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
293		386	hmac_gen (ctx, hmac_digest);
294	memcpy (hmac, hmac_digest, HMACLENGTH);	387	memcpy (hmac, hmac_digest, HMACLENGTH);
295	}	388	}
296		389
297	bool	390	bool
298	hmac_packet::hmac_chk (crypto_ctx *ctx)	391	hmac_packet::hmac_chk (crypto_ctx *ctx)
299	{	392	{
300	hmac_gen (ctx);	393	unsigned char hmac_digest[EVP_MAX_MD_SIZE];
301		394	hmac_gen (ctx, hmac_digest);
302	return !memcmp (hmac, hmac_digest, HMACLENGTH);	395	return !memcmp (hmac, hmac_digest, HMACLENGTH);
303	}	396	}
304		397
		398	void
305	void vpn_packet::set_hdr (ptype type_, unsigned int dst)	399	vpn_packet::set_hdr (ptype type_, unsigned int dst)
306	{	400	{
307	type = type_;	401	type = type_;
308		402
309	int src = THISNODE->id;	403	int src = THISNODE->id;
310		404
…		…
315		409
316	#define MAXVPNDATA (MAX_MTU - 6 - 6)	410	#define MAXVPNDATA (MAX_MTU - 6 - 6)
317	#define DATAHDR (sizeof (u32) + RAND_SIZE)	411	#define DATAHDR (sizeof (u32) + RAND_SIZE)
318		412
319	struct vpndata_packet : vpn_packet	413	struct vpndata_packet : vpn_packet
		414	{
		415	u8 data[MAXVPNDATA + DATAHDR]; // seqno
		416
		417	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
		418	tap_packet unpack (connection conn, u32 &seqno);
		419
		420	private:
		421	const u32 data_hdr_size () const
320	{	422	{
321	u8 data[MAXVPNDATA + DATAHDR]; // seqno
322
323	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
324	tap_packet unpack (connection conn, u32 &seqno);
325	private:
326
327	const u32 data_hdr_size () const
328	{
329	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	423	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
330	}
331	};	424	}
		425	};
332		426
333	void	427	void
334	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)	428	vpndata_packet::setup (connection conn, int dst, u8 d, u32 l, u32 seqno)
335	{	429	{
336	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	430	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
…		…
338	ptype type = PT_DATA_UNCOMPRESSED;	432	ptype type = PT_DATA_UNCOMPRESSED;
339		433
340	#if ENABLE_COMPRESSION	434	#if ENABLE_COMPRESSION
341	u8 cdata[MAX_MTU];	435	u8 cdata[MAX_MTU];
342		436
343	if (conn->features & ENABLE_COMPRESSION)	437	if (conn->features & FEATURE_COMPRESSION)
344	{	438	{
345	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	439	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
346		440
347	if (cl)	441	if (cl)
348	{	442	{
…		…
354	d[1] = cl;	448	d[1] = cl;
355	}	449	}
356	}	450	}
357	#endif	451	#endif
358		452
359	require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0));	453	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
360		454
361	struct {	455	struct {
362	#if RAND_SIZE	456	#if RAND_SIZE
363	u8 rnd[RAND_SIZE];	457	u8 rnd[RAND_SIZE];
364	#endif	458	#endif
365	u32 seqno;	459	u32 seqno;
366	} datahdr;	460	} datahdr;
367		461
368	datahdr.seqno = ntohl (seqno);	462	datahdr.seqno = ntohl (seqno);
369	#if RAND_SIZE	463	#if RAND_SIZE
370	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	464	// NB: a constant (per session) random prefix
		465	// is likely enough, but we don't take any chances.
		466	conn->oiv.get (datahdr.rnd, RAND_SIZE);
371	#endif	467	#endif
372		468
373	require (EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
374	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
375	(unsigned char *) &datahdr, DATAHDR));	471	(unsigned char *) &datahdr, DATAHDR));
…		…
397	int outl = 0, outl2;	493	int outl = 0, outl2;
398	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
399	u8 *d;	495	u8 *d;
400	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
401		497
402	require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0));	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
403		499
404	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
405	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
406		502
407	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
408	d = cdata;	504	d = cdata;
409	else	505	else
410	#endif	506	#endif
411	d = &(*p)[6 + 6 - DATAHDR];	507	d = &(*p)[6 + 6] - DATAHDR;
412		508
413	/* this overwrites part of the src mac, but we fix that later */	509	// we play do evil games with the struct layout atm.
		510	// pending better solutions, we at least do some verification.
		511	// this is fine, as we left ISO territory long ago.
		512	require (DATAHDR <= 16);
		513	require ((u8 )(&p->len + 1) == &(p)[0]);
		514
		515	// this can overwrite the len/dst/src fields
414	require (EVP_DecryptUpdate (cctx,	516	require (EVP_DecryptUpdate (cctx,
415	d, &outl2,	517	d, &outl2,
416	(unsigned char *)&data, len - data_hdr_size ()));	518	(unsigned char *)&data, len - data_hdr_size ()));
417	outl += outl2;	519	outl += outl2;
418		520
…		…
449	}	551	}
450	};	552	};
451		553
452	struct config_packet : vpn_packet	554	struct config_packet : vpn_packet
453	{	555	{
454	// actually, hmaclen cannot be checked because the hmac	556	u8 serial[SERIAL_SIZE];
455	// field comes before this data, so peers with other
456	// hmacs simply will not work.
457	u8 prot_major, prot_minor, randsize, hmaclen;	557	u8 prot_major, prot_minor, randsize;
458	u8 flags, challengelen, features, pad3;	558	u8 flags, features, pad6, pad7, pad8;
459	u32 cipher_nid, digest_nid, hmac_nid;	559	u32 cipher_nid, mac_nid, auth_nid;
460		560
461	void setup (ptype type, int dst);	561	void setup (ptype type, int dst);
462	bool chk_config () const;	562	bool chk_config (const conf_node *conf, const sockinfo &rsi) const;
463		563
464	static u8 get_features ()	564	static u8 get_features ()
465	{	565	{
466	u8 f = 0;	566	u8 f = 0;
467	#if ENABLE_COMPRESSION	567	#if ENABLE_COMPRESSION
…		…
475	#endif	575	#endif
476	return f;	576	return f;
477	}	577	}
478	};	578	};
479		579
		580	void
480	void config_packet::setup (ptype type, int dst)	581	config_packet::setup (ptype type, int dst)
481	{	582	{
482	prot_major = PROTOCOL_MAJOR;	583	prot_major = PROTOCOL_MAJOR;
483	prot_minor = PROTOCOL_MINOR;	584	prot_minor = PROTOCOL_MINOR;
484	randsize = RAND_SIZE;	585	randsize = RAND_SIZE;
485	hmaclen = HMACLENGTH;
486	flags = 0;	586	flags = 0;
487	challengelen = sizeof (rsachallenge);
488	features = get_features ();	587	features = get_features ();
489		588
		589	strncpy ((char *)serial, conf.serial, sizeof (serial));
		590
490	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	591	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
491	digest_nid = htonl (EVP_MD_type (RSA_HASH));
492	hmac_nid = htonl (EVP_MD_type (DIGEST));	592	mac_nid = htonl (EVP_MD_type (MAC_DIGEST ()));
		593	auth_nid = htonl (EVP_MD_type (AUTH_DIGEST ()));
493		594
494	len = sizeof (*this) - sizeof (net_packet);	595	len = sizeof (*this) - sizeof (net_packet);
495	set_hdr (type, dst);	596	set_hdr (type, dst);
496	}	597	}
497		598
498	bool config_packet::chk_config () const	599	bool
		600	config_packet::chk_config (const conf_node *conf, const sockinfo &rsi) const
499	{	601	{
500	if (prot_major != PROTOCOL_MAJOR)	602	if (prot_major != PROTOCOL_MAJOR)
501	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);	603	slog (L_WARN, _("%s(%s): major version mismatch (remote %d <=> local %d)"),
		604	conf->nodename, (const char *)rsi, prot_major, PROTOCOL_MAJOR);
502	else if (randsize != RAND_SIZE)	605	else if (randsize != RAND_SIZE)
503	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);	606	slog (L_WARN, _("%s(%s): rand size mismatch (remote %d <=> local %d)"),
504	else if (hmaclen != HMACLENGTH)	607	conf->nodename, (const char *)rsi, randsize, RAND_SIZE);
505	slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH);
506	else if (challengelen != sizeof (rsachallenge))
507	slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge));
508	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER)))	608	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
509	slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER));	609	slog (L_WARN, _("%s(%s): cipher algo mismatch (remote %x <=> local %x)"),
510	else if (digest_nid != htonl (EVP_MD_type (RSA_HASH)))	610	conf->nodename, (const char *)rsi, ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
511	slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH));
512	else if (hmac_nid != htonl (EVP_MD_type (DIGEST)))	611	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
513	slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST));	612	slog (L_WARN, _("%s(%s): mac algo mismatch (remote %x <=> local %x)"),
		613	conf->nodename, (const char *)rsi, ntohl (mac_nid), EVP_MD_type (MAC_DIGEST ()));
		614	else if (auth_nid != htonl (EVP_MD_type (AUTH_DIGEST ())))
		615	slog (L_WARN, _("%s(%s): auth algo mismatch (remote %x <=> local %x)"),
		616	conf->nodename, (const char *)rsi, ntohl (auth_nid), EVP_MD_type (AUTH_DIGEST ()));
514	else	617	else
		618	{
		619	int cmp = memcmp (serial, ::conf.serial, sizeof (serial));
		620
		621	if (cmp > 0)
		622	slog (L_WARN, _("%s(%s): remote serial newer than local serial - outdated config?"),
		623	conf->nodename, (const char *)rsi);
		624	else if (cmp == 0)
515	return true;	625	return true;
		626	}
516		627
517	return false;	628	return false;
518	}	629	}
519		630
520	struct auth_req_packet : config_packet	631	struct auth_req_packet : config_packet // UNPROTECTED
521	{	632	{
522	char magic[8];	633	char magic[8];
523	u8 initiate; // false if this is just an automatic reply	634	u8 initiate; // false if this is just an automatic reply
524	u8 protocols; // supported protocols (will be patched on forward)	635	u8 protocols; // supported protocols (will be patched on forward)
525	u8 pad2, pad3;	636	u8 pad2, pad3;
526	rsaid id;	637	auth_encr encr;
527	rsaencrdata encr;
528		638
529	auth_req_packet (int dst, bool initiate_, u8 protocols_)	639	auth_req_packet (int dst, bool initiate_, u8 protocols_)
530	{	640	{
531	config_packet::setup (PT_AUTH_REQ, dst);	641	config_packet::setup (PT_AUTH_REQ, dst);
532	strncpy (magic, MAGIC, 8);	642	memcpy (magic, MAGIC, 8);
533	initiate = !!initiate_;	643	initiate = !!initiate_;
534	protocols = protocols_;	644	protocols = protocols_;
535		645
536	len = sizeof (*this) - sizeof (net_packet);	646	len = sizeof (*this) - sizeof (net_packet);
537	}	647	}
538	};	648	};
539		649
540	struct auth_res_packet : config_packet	650	struct auth_res_packet : vpn_packet // UNPROTECTED
541	{	651	{
542	rsaid id;
543	u8 pad1, pad2, pad3;
544	u8 response_len; // encrypted length
545	rsaresponse response;	652	auth_response response;
546		653
547	auth_res_packet (int dst)	654	auth_res_packet (int dst)
548	{	655	{
549	config_packet::setup (PT_AUTH_RES, dst);	656	set_hdr (PT_AUTH_RES, dst);
550		657
551	len = sizeof (*this) - sizeof (net_packet);	658	len = sizeof (*this) - sizeof (net_packet);
552	}	659	}
553	};	660	};
554		661
…		…
584	};	691	};
585		692
586	/////////////////////////////////////////////////////////////////////////////	693	/////////////////////////////////////////////////////////////////////////////
587		694
588	void	695	void
589	connection::connection_established ()	696	connection::connection_established (const sockinfo &rsi)
590	{	697	{
591	slog (L_TRACE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);	698	if (!have_snd_auth \|\| !have_rcv_auth)
		699	return;
592		700
593	if (ictx && octx)	701	si = rsi;
		702	protocol = rsi.prot;
		703
		704	slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
		705	conf->nodename, (const char *)rsi,
		706	vpn->can_direct (THISNODE, conf) ? "direct" : "forwarded",
		707	PROTOCOL_MAJOR, prot_minor);
		708
		709	if (::conf.script_node_up)
		710	{
		711	run_script_cb *cb = new run_script_cb;
		712	cb->set<connection, &connection::script_node_up> (this);
		713	run_script_queued (cb, _("node-up command execution failed, continuing."));
594	{	714	}
595	connectmode = conf->connectmode;	715
		716	delete ictx; ictx = new crypto_ctx (rcv_auth, snd_auth, rcv_ecdh_a, rcv_auth.ecdh, 0);
		717	iseqno.reset (ntohl (rcv_auth.rsa.seqno) & 0x7fffffff);
596		718
		719	delete octx; octx = new crypto_ctx (snd_auth, rcv_auth, snd_ecdh_a, snd_ecdh_b , 1);
		720	oseqno = ntohl (snd_auth.rsa.seqno) & 0x7fffffff;
		721
		722	oiv.reset ();
		723
597	// make sure rekeying timeouts are slightly asymmetric	724	// make sure rekeying timeouts are slightly asymmetric
598	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);	725	ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
599	rekey.start (rekey_interval, rekey_interval);	726	rekey.start (rekey_interval, rekey_interval);
		727
		728	hmac_error = 0.;
		729
600	keepalive.start (::conf.keepalive);	730	keepalive.start (::conf.keepalive);
601		731
602	// send queued packets	732	// send queued packets
603	if (ictx && octx)
604	{
605	while (tap_packet p = (tap_packet )data_queue.get ())	733	while (tap_packet p = (tap_packet )data_queue.get ())
606	{	734	{
607	send_data_packet (p);	735	if (p->len) send_data_packet (p);
608	delete p;	736	delete p;
609	}	737	}
610		738
611	while (vpn_packet p = (vpn_packet )vpn_queue.get ())	739	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
612	{	740	{
613	send_vpn_packet (p, si, IPTOS_RELIABILITY);	741	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
614	delete p;	742	delete p;
615	}
616	}
617	}	743	}
		744
		745	vpn->connection_established (this);
		746	}
		747
		748	void
		749	connection::reset_si ()
		750	{
		751	if (vpn->can_direct (THISNODE, conf))
		752	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
618	else	753	else
619	{	754	{
620	retry_cnt = 0;
621	establish_connection.start (5);
622	keepalive.stop ();
623	rekey.stop ();
624	}
625	}
626
627	void
628	connection::reset_si ()
629	{
630	protocol = best_protocol (THISNODE->protocols & conf->protocols);
631
632	// mask out protocols we cannot establish
633	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
634	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
635	if (!conf->dns_port) protocol &= ~PROT_DNSv4;
636
637	if (protocol
638	&& (!conf->can_direct (THISNODE)
639	\|\| !THISNODE->can_direct (conf)))
640	{
641	slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename);	755	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
642	protocol = 0;	756	protocol = 0;
643	}	757	}
644		758
645	si.set (conf, protocol);	759	si.set (conf, protocol);
646	}	760	}
…		…
649	const sockinfo &	763	const sockinfo &
650	connection::forward_si (const sockinfo &si) const	764	connection::forward_si (const sockinfo &si) const
651	{	765	{
652	if (!si.valid ())	766	if (!si.valid ())
653	{	767	{
654	connection *r = vpn->find_router ();	768	connection *r = vpn->find_router_for (this);
655		769
656	if (r)	770	if (r)
657	{	771	{
658	slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"),	772	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
659	conf->nodename, r->conf->nodename, (const char *)r->si);	773	conf->nodename, r->conf->nodename);
660	return r->si;	774	return r->si;
661	}	775	}
662	else	776	else
663	slog (L_DEBUG, _("%s: node unreachable, no common protocol"),	777	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
664	conf->nodename);	778	conf->nodename);
665	}	779	}
666		780
667	return si;	781	return si;
668	}	782	}
669		783
670	void	784	void
671	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	785	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
672	{	786	{
673	if (!vpn->send_vpn_packet (pkt, si, tos))	787	if (!vpn->send_vpn_packet (pkt, si, tos))
674	reset_connection ();	788	reset_connection ("packet send error");
675	}	789	}
676		790
677	void	791	void
678	connection::send_ping (const sockinfo &si, u8 pong)	792	connection::send_ping (const sockinfo &si, u8 pong)
679	{	793	{
680	ping_packet *pkt = new ping_packet;	794	ping_packet *pkt = new ping_packet;
681		795
682	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);	796	pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
		797
		798	slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
683	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	799	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
684		800
685	delete pkt;	801	delete pkt;
686	}	802	}
687		803
…		…
702	void	818	void
703	connection::send_auth_request (const sockinfo &si, bool initiate)	819	connection::send_auth_request (const sockinfo &si, bool initiate)
704	{	820	{
705	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);	821	auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols);
706		822
707	rsachallenge chg;	823	generate_auth_data ();
708	rsa_cache.gen (pkt->id, chg);
709	rsa_encrypt (conf->rsa_key, chg, pkt->encr);	824	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
710		825
711	slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si);	826	slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
712
713	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly	827	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
714		828
715	delete pkt;	829	delete pkt;
716	}	830	}
717		831
718	void	832	void
719	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	833	connection::send_auth_response (const sockinfo &si)
720	{	834	{
721	auth_res_packet *pkt = new auth_res_packet (conf->id);	835	auth_res_packet *pkt = new auth_res_packet (conf->id);
722		836
723	pkt->id = id;	837	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof rcv_ecdh_b);
		838	auth_hash (rcv_auth, rcv_ecdh_b, pkt->response.mac);
724		839
725	rsa_hash (id, chg, pkt->response);
726
727	pkt->hmac_set (octx);
728
729	slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si);	840	slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
730
731	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	841	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
732		842
733	delete pkt;	843	delete pkt;
734	}	844	}
735		845
736	void	846	void
737	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	847	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
738	{	848	{
739	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)",	849	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
740	conf->id, rid, (const char *)rsi);	850	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		851	conf->protocols);
741		852
742	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);	853	connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
743		854
744	r->hmac_set (octx);	855	r->hmac_set (octx);
745	send_vpn_packet (r, si);	856	send_vpn_packet (r, si);
746		857
747	delete r;	858	delete r;
748	}	859	}
749		860
750	void	861	inline void
751	connection::establish_connection_cb (ev::timer &w, int revents)	862	connection::establish_connection_cb (ev::timer &w, int revents)
752	{	863	{
753	if (!ictx	864	if (!(ictx && octx)
754	&& conf != THISNODE	865	&& conf != THISNODE
755	&& connectmode != conf_node::C_NEVER	866	&& connectmode != conf_node::C_NEVER
756	&& connectmode != conf_node::C_DISABLED	867	&& connectmode != conf_node::C_DISABLED
757	&& !w.is_active ())	868	&& !w.is_active ())
758	{	869	{
		870	// a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
		871	// and stop trying. should probably be handled by a per-connection expire handler.
		872	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
		873	{
		874	reset_connection ("no demand");
		875	return;
		876	}
		877
		878	last_establish_attempt = ev_now ();
		879
759	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3	880	ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
760	? (retry_cnt & 3) + 1	881	? (retry_cnt & 3) + 1
761	: 1 << (retry_cnt >> 2));	882	: 1 << (retry_cnt >> 2));
762		883
763	reset_si ();	884	reset_si ();
764		885
765	bool slow = si.prot & PROT_SLOW;	886	bool slow = (si.prot & PROT_SLOW) \|\| (conf->low_power \|\| THISNODE->low_power);
766		887
767	if (si.prot && !si.host)	888	if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
768	{	889	{
769	slog (L_TRACE, _("%s: connection request (indirect)"), conf->nodename);
770	/TODO/ /* start the timer so we don't recurse endlessly */	890	/TODO/ /* start the timer so we don't recurse endlessly */
771	w.start (1);	891	w.start (1);
772	vpn->send_connect_request (conf->id);	892	vpn->send_connect_request (this);
773	}	893	}
774	else	894	else
775	{	895	{
776	slog (L_TRACE, _("%s: connection request (direct)"), conf->nodename, !!ictx, !!octx);	896	if (si.valid ())
		897	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		898	conf->nodename, (const char *)si);
777		899
778	const sockinfo &dsi = forward_si (si);	900	const sockinfo &dsi = forward_si (si);
779		901
780	slow = slow \|\| (dsi.prot & PROT_SLOW);	902	slow = slow \|\| (dsi.prot & PROT_SLOW);
781		903
782	if (dsi.valid () && auth_rate_limiter.can (dsi))	904	if (dsi.valid () && auth_rate_limiter.can (dsi))
783	{	905	{
784	if (retry_cnt < 4)	906	// use ping after the first few retries
		907	// TODO: on rekeys, the other node might not interpret ping correctly,
		908	// TODO: as it will still have a valid connection
		909	if (retry_cnt < 4 && (!conf->low_power \|\| THISNODE->low_power))
785	send_auth_request (dsi, true);	910	send_auth_request (dsi, true);
786	else	911	else
787	send_ping (dsi, 0);	912	send_ping (dsi, 0);
788	}	913	}
789	}	914	}
790		915
791	retry_int *= slow ? 8. : 0.7;	916	retry_int *= slow ? 4. : 0.9;
792		917
793	if (retry_int < conf->max_retry)	918	if (retry_int < conf->max_retry)
794	retry_cnt++;	919	retry_cnt++;
795	else	920	else
796	retry_int = conf->max_retry;	921	retry_int = conf->max_retry;
…		…
798	w.start (retry_int);	923	w.start (retry_int);
799	}	924	}
800	}	925	}
801		926
802	void	927	void
803	connection::reset_connection ()	928	connection::reset_connection (const char *reason)
804	{	929	{
805	if (ictx && octx)	930	if (ictx && octx)
806	{	931	{
807	slog (L_INFO, _("%s(%s): connection lost"),	932	slog (L_INFO, _("%s(%s): connection lost (%s)"),
808	conf->nodename, (const char *)si);	933	conf->nodename, (const char *)si, reason);
809		934
810	if (::conf.script_node_down)	935	if (::conf.script_node_down)
811	{	936	{
812	run_script_cb cb;	937	run_script_cb *cb = new run_script_cb;
813	callback_set (cb, this, connection, script_node_down);	938	cb->set<connection, &connection::script_node_down> (this);
814	if (!run_script (cb, false))
815	slog (L_WARN, _("node-down command execution failed, continuing."));	939	run_script_queued (cb, _("node-down command execution failed, continuing."));
816	}	940	}
817	}	941	}
818		942
819	delete ictx; ictx = 0;	943	delete ictx; ictx = 0;
820	delete octx; octx = 0;	944	delete octx; octx = 0;
821	#if ENABLE_DNS
822	dnsv4_reset_connection ();
823	#endif
824		945
825	si.host = 0;	946	si.host = 0;
826		947
		948	have_snd_auth = false;
		949	have_rcv_auth = false;
		950	auth_expire = 0.;
		951
827	last_activity = 0;	952	last_activity = 0.;
		953	//last_si_change = 0.;
828	retry_cnt = 0;	954	retry_cnt = 0;
829		955
830	rekey.stop ();	956	rekey.stop ();
831	keepalive.stop ();	957	keepalive.stop ();
832	establish_connection.stop ();	958	establish_connection.stop ();
…		…
836	connection::shutdown ()	962	connection::shutdown ()
837	{	963	{
838	if (ictx && octx)	964	if (ictx && octx)
839	send_reset (si);	965	send_reset (si);
840		966
841	reset_connection ();	967	reset_connection ("shutdown");
842	}	968	}
843		969
844	void	970	// poor-man's rekeying
		971	inline void
845	connection::rekey_cb (ev::timer &w, int revents)	972	connection::rekey_cb (ev::timer &w, int revents)
846	{	973	{
847	reset_connection ();	974	reset_connection ("rekeying");
848	establish_connection ();	975	establish_connection ();
849	}	976	}
850		977
851	void	978	void
852	connection::send_data_packet (tap_packet *pkt)	979	connection::send_data_packet (tap_packet *pkt)
…		…
866	if (oseqno > MAX_SEQNO)	993	if (oseqno > MAX_SEQNO)
867	rekey ();	994	rekey ();
868	}	995	}
869		996
870	void	997	void
		998	connection::post_inject_queue ()
		999	{
		1000	// force a connection every now and when when packets are sent (max 1/s)
		1001	if (ev_now () - last_establish_attempt >= (conf->low_power \|\| THISNODE->low_power ? 2.95 : 0.95)) // arbitrary
		1002	establish_connection.stop ();
		1003
		1004	establish_connection ();
		1005	}
		1006
		1007	void
871	connection::inject_data_packet (tap_packet pkt, bool broadcast/TODO DDD*/)	1008	connection::inject_data_packet (tap_packet *pkt)
872	{	1009	{
873	if (ictx && octx)	1010	if (ictx && octx)
874	send_data_packet (pkt);	1011	send_data_packet (pkt);
875	else	1012	else
876	{	1013	{
877	if (!broadcast)
878	data_queue.put (new tap_packet (*pkt));	1014	data_queue.put (new tap_packet (*pkt));
879		1015	post_inject_queue ();
880	establish_connection ();
881	}	1016	}
882	}	1017	}
883		1018
		1019	void
884	void connection::inject_vpn_packet (vpn_packet *pkt, int tos)	1020	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
885	{	1021	{
886	if (ictx && octx)	1022	if (ictx && octx)
887	send_vpn_packet (pkt, si, tos);	1023	send_vpn_packet (pkt, si, tos);
888	else	1024	else
889	{	1025	{
890	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));	1026	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
891		1027	post_inject_queue ();
892	establish_connection ();
893	}	1028	}
894	}	1029	}
895		1030
896	void	1031	void
897	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1032	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
898	{	1033	{
899	last_activity = ev_now ();	1034	last_activity = ev_now ();
900		1035
901	slog (L_NOISE, "<<%d received packet type %d from %d to %d",	1036	slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
902	conf->id, pkt->typ (), pkt->src (), pkt->dst ());	1037	conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
903		1038
904	if (connectmode == conf_node::C_DISABLED)	1039	if (connectmode == conf_node::C_DISABLED)
905	return;	1040	return;
906		1041
907	switch (pkt->typ ())	1042	switch (pkt->typ ())
908	{	1043	{
909	case vpn_packet::PT_PING:	1044	case vpn_packet::PT_PING:
		1045	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1046
910	// we send pings instead of auth packets after some retries,	1047	// we send pings instead of auth packets after some retries,
911	// so reset the retry counter and establish a connection	1048	// so reset the retry counter and establish a connection
912	// when we receive a ping.	1049	// when we receive a ping.
913	if (!ictx)	1050	if (!ictx)
914	{	1051	{
915	if (auth_rate_limiter.can (rsi))	1052	if (auth_rate_limiter.can (rsi))
916	send_auth_request (rsi, true);	1053	send_auth_request (rsi, true);
917	}	1054	}
918	else	1055	else
		1056	// we would love to change the socket address here, but ping's aren't
		1057	// authenticated, so we best ignore it.
919	send_ping (rsi, 1); // pong	1058	send_ping (rsi, 1); // pong
920		1059
921	break;	1060	break;
922		1061
923	case vpn_packet::PT_PONG:	1062	case vpn_packet::PT_PONG:
		1063	slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
		1064
		1065	// a PONG might mean that the other side doesn't really know
		1066	// about our desire for communication.
		1067	establish_connection ();
924	break;	1068	break;
925		1069
926	case vpn_packet::PT_RESET:	1070	case vpn_packet::PT_RESET:
		1071	slog (L_TRACE, "%s >> PT_RESET", conf->nodename);
		1072
		1073	if (ictx && octx)
927	{	1074	{
928	reset_connection ();	1075	reset_connection ("remote reset");
929		1076
930	config_packet p = (config_packet ) pkt;	1077	config_packet p = (config_packet ) pkt;
931		1078
932	if (!p->chk_config ())	1079	if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
933	{
934	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),
935	conf->nodename, (const char *)rsi);
936	connectmode = conf_node::C_DISABLED;
937	}
938	else if (connectmode == conf_node::C_ALWAYS)
939	establish_connection ();	1080	establish_connection ();
940	}	1081	}
		1082
941	break;	1083	break;
942		1084
943	case vpn_packet::PT_AUTH_REQ:	1085	case vpn_packet::PT_AUTH_REQ:
944	if (auth_rate_limiter.can (rsi))	1086	if (auth_rate_limiter.can (rsi))
945	{	1087	{
946	auth_req_packet p = (auth_req_packet ) pkt;	1088	auth_req_packet p = (auth_req_packet )pkt;
947		1089
948	slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate);	1090	slog (L_TRACE, "%s >> PT_AUTH_REQ(%s,p%02x,f%02x)",
		1091	conf->nodename, p->initiate ? "initiate" : "reply",
		1092	p->protocols, p->features);
949		1093
950	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1094	if (memcmp (p->magic, MAGIC, 8))
		1095	{
		1096	slog (L_WARN, _("%s(%s): protocol magic mismatch - stray packet?"),
		1097	conf->nodename, (const char *)rsi);
		1098	}
		1099	else if (p->chk_config (conf, rsi))
951	{	1100	{
952	if (p->prot_minor != PROTOCOL_MINOR)	1101	if (p->prot_minor != PROTOCOL_MINOR)
953	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),	1102	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
954	conf->nodename, (const char *)rsi,	1103	conf->nodename, (const char *)rsi,
955	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1104	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
956		1105
957	if (p->initiate)	1106	if (p->initiate)
		1107	{
958	send_auth_request (rsi, false);	1108	send_auth_request (rsi, false);
959		1109
960	rsachallenge k;	1110	if (ictx && octx)
		1111	reset_connection ("reconnect");
		1112	}
961		1113
		1114	auth_data auth;
		1115
962	if (!rsa_decrypt (::conf.rsa_key, p->encr, k))	1116	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
963	{	1117	{
964	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),	1118	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
965	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));	1119	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
966	break;
967	}	1120	}
968	else	1121	else
969	{	1122	{
970	delete octx;	1123	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
971		1124
972	octx = new crypto_ctx (k, 1);	1125	rcv_auth = auth;
973	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1126	have_rcv_auth = true;
974		1127
		1128	send_auth_response (rsi);
		1129
		1130	if (chg)
		1131	{
975	conf->protocols = p->protocols;	1132	conf->protocols = p->protocols;
976	features = p->features & config_packet::get_features ();	1133	features = p->features & config_packet::get_features ();
977		1134
978	send_auth_response (rsi, p->id, k);
979
980	connection_established ();	1135	connection_established (rsi);
981
982	break;	1136	}
983	}	1137	}
		1138
		1139	break;
984	}	1140	}
985	else
986	slog (L_WARN, _("%s(%s): protocol mismatch"),
987	conf->nodename, (const char *)rsi);
988		1141
989	send_reset (rsi);	1142	send_reset (rsi);
990	}	1143	}
991		1144
992	break;	1145	break;
993		1146
994	case vpn_packet::PT_AUTH_RES:	1147	case vpn_packet::PT_AUTH_RES:
995	{	1148	{
996	auth_res_packet p = (auth_res_packet ) pkt;	1149	auth_res_packet p = (auth_res_packet )pkt;
997		1150
998	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1151	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
999		1152
1000	if (p->chk_config ())	1153	auth_mac local_mac;
		1154	auth_hash (snd_auth, p->response.ecdh, local_mac);
		1155
		1156	if (memcmp (&p->response.mac, local_mac, sizeof local_mac))
1001	{	1157	{
1002	if (p->prot_minor != PROTOCOL_MINOR)
1003	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
1004	conf->nodename, (const char *)rsi,
1005	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
1006
1007	rsachallenge chg;
1008
1009	if (!rsa_cache.find (p->id, chg))
1010	{
1011	slog (L_ERR, _("%s(%s): unrequested auth response ignored"),	1158	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
1012	conf->nodename, (const char *)rsi);	1159	conf->nodename, (const char *)rsi);
1013	break;
1014	}	1160	}
1015	else	1161	else if (!have_snd_auth)
1016	{	1162	{
1017	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1163	memcpy (snd_ecdh_b, p->response.ecdh, sizeof snd_ecdh_b);
1018		1164
1019	if (!p->hmac_chk (cctx))	1165	have_snd_auth = true;
1020	{
1021	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
1022	"could be an attack, or just corruption or a synchronization error"),
1023	conf->nodename, (const char *)rsi);
1024	break;
1025	}
1026	else
1027	{
1028	rsaresponse h;
1029
1030	rsa_hash (p->id, chg, h);
1031
1032	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
1033	{
1034	prot_minor = p->prot_minor;
1035
1036	delete ictx; ictx = cctx;
1037
1038	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1039
1040	si = rsi;
1041	protocol = rsi.prot;
1042
1043	connection_established ();	1166	connection_established (rsi);
1044
1045	slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1046	conf->nodename, (const char *)rsi,
1047	p->prot_major, p->prot_minor);
1048
1049	if (::conf.script_node_up)
1050	{
1051	run_script_cb cb;
1052	callback_set (cb, this, connection, script_node_up);
1053	if (!run_script (cb, false))
1054	slog (L_WARN, _("node-up command execution failed, continuing."));
1055	}
1056
1057	break;
1058	}
1059	else
1060	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
1061	conf->nodename, (const char *)rsi);
1062	}
1063
1064	delete cctx;
1065	}
1066	}	1167	}
1067	}	1168	}
1068
1069	send_reset (rsi);
1070	break;	1169	break;
1071		1170
1072	case vpn_packet::PT_DATA_COMPRESSED:	1171	case vpn_packet::PT_DATA_COMPRESSED:
1073	#if !ENABLE_COMPRESSION	1172	#if !ENABLE_COMPRESSION
1074	send_reset (rsi);	1173	send_reset (rsi);
…		…
1080	if (ictx && octx)	1179	if (ictx && octx)
1081	{	1180	{
1082	vpndata_packet p = (vpndata_packet )pkt;	1181	vpndata_packet p = (vpndata_packet )pkt;
1083		1182
1084	if (!p->hmac_chk (ictx))	1183	if (!p->hmac_chk (ictx))
		1184	{
		1185	// rekeying often creates temporary hmac auth floods
		1186	// we assume they don't take longer than a few seconds normally,
		1187	// and suppress messages and resets during that time.
		1188	//TODO: should be done per source address
		1189	if (!hmac_error)
		1190	{
		1191	hmac_error = ev_now () + 3;
		1192	break;
		1193	}
		1194	else if (hmac_error >= ev_now ())
		1195	break; // silently suppress
		1196	else
		1197	{
1085	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"	1198	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1086	"could be an attack, or just corruption or a synchronization error"),	1199	"could be an attack, or just corruption or a synchronization error."),
1087	conf->nodename, (const char *)rsi);	1200	conf->nodename, (const char *)rsi);
		1201	// reset
		1202	}
		1203	}
1088	else	1204	else
1089	{	1205	{
1090	u32 seqno;	1206	u32 seqno;
1091	tap_packet *d = p->unpack (this, seqno);	1207	tap_packet *d = p->unpack (this, seqno);
		1208	int seqclass = iseqno.seqno_classify (seqno);
1092		1209
1093	if (iseqno.recv_ok (seqno))	1210	hmac_error = 0;
		1211
		1212	if (seqclass == 0) // ok
1094	{	1213	{
1095	vpn->tap->send (d);	1214	vpn->tap->send (d);
1096		1215
1097	if (si != rsi)	1216	if (si != rsi)
1098	{	1217	{
1099	// fast re-sync on source address changes, useful especially for tcp/ip	1218	// fast re-sync on source address changes, useful especially for tcp/ip
		1219	//if (last_si_change < ev_now () + 5.)
1100	si = rsi;	1220	// {
1101
1102	slog (L_INFO, _("%s(%s): socket address changed to %s"),	1221	slog (L_INFO, _("%s(%s): changing socket address to %s."),
1103	conf->nodename, (const char )si, (const char )rsi);	1222	conf->nodename, (const char )si, (const char )rsi);
		1223
		1224	si = rsi;
		1225
		1226	if (::conf.script_node_change)
		1227	{
		1228	run_script_cb *cb = new run_script_cb;
		1229	cb->set<connection, &connection::script_node_change> (this);
		1230	run_script_queued (cb, _("node-change command execution failed, continuing."));
		1231	}
		1232
		1233	// }
		1234	//else
		1235	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
		1236	// conf->nodename, (const char )si, (const char )rsi);
1104	}	1237	}
		1238	}
		1239	else if (seqclass == 1) // far history
		1240	slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
		1241	"possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
		1242	else if (seqclass == 2) // in-window duplicate, happens often on wireless
		1243	slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
		1244	"possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
		1245	else if (seqclass == 3) // reset
		1246	{
		1247	slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
		1248	"probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
		1249	send_reset (rsi);
1105	}	1250	}
1106		1251
1107	delete d;	1252	delete d;
1108	break;	1253	break;
1109	}	1254	}
…		…
1113	break;	1258	break;
1114		1259
1115	case vpn_packet::PT_CONNECT_REQ:	1260	case vpn_packet::PT_CONNECT_REQ:
1116	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1261	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1117	{	1262	{
1118	connect_req_packet p = (connect_req_packet ) pkt;	1263	connect_req_packet p = (connect_req_packet )pkt;
1119		1264
1120	if (p->id > 0 && p->id <= vpn->conns.size ())	1265	if (p->id > 0 && p->id <= vpn->conns.size ())
1121	{	1266	{
1122	connection *c = vpn->conns[p->id - 1];	1267	connection *c = vpn->conns[p->id - 1];
1123	conf->protocols = p->protocols;	1268	conf->protocols = p->protocols;
1124		1269
1125	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]",	1270	slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s,p%02x) [%d]",
		1271	conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
		1272	p->protocols,
1126	conf->id, p->id, c->ictx && c->octx);	1273	c->ictx && c->octx);
1127		1274
1128	if (c->ictx && c->octx)	1275	if (c->ictx && c->octx)
1129	{	1276	{
1130	// send connect_info packets to both sides, in case one is	1277	// send connect_info packets to both sides, in case one is
1131	// behind a nat firewall (or both ;)	1278	// behind a nat firewall (or both ;)
…		…
1154		1301
1155	c->conf->protocols = p->protocols;	1302	c->conf->protocols = p->protocols;
1156	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));	1303	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1157	p->si.upgrade_protocol (protocol, c->conf);	1304	p->si.upgrade_protocol (protocol, c->conf);
1158		1305
1159	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1306	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
1160	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1307	conf->nodename,
		1308	vpn->conns[p->id - 1]->conf->nodename,
		1309	(const char *)p->si,
		1310	p->protocols,
		1311	protocol,
		1312	p->si.supported_protocols (c->conf),
		1313	!c->ictx && !c->octx);
1161		1314
1162	const sockinfo &dsi = forward_si (p->si);	1315	const sockinfo &dsi = forward_si (p->si);
1163		1316
1164	if (dsi.valid ())	1317	if (dsi.valid ())
1165	c->send_auth_request (dsi, true);	1318	c->send_auth_request (dsi, true);
		1319	else
		1320	slog (L_INFO, "connect info for %s received (%s), but still unable to contact.",
		1321	vpn->conns[p->id - 1]->conf->nodename,
		1322	(const char *)p->si);
1166	}	1323	}
1167	else	1324	else
1168	slog (L_WARN,	1325	slog (L_WARN,
1169	_("received authenticated connection request from unknown node #%d, config file mismatch?"),	1326	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
1170	p->id);	1327	p->id);
…		…
1176	send_reset (rsi);	1333	send_reset (rsi);
1177	break;	1334	break;
1178	}	1335	}
1179	}	1336	}
1180		1337
		1338	inline void
1181	void connection::keepalive_cb (ev::timer &w, int revents)	1339	connection::keepalive_cb (ev::timer &w, int revents)
1182	{	1340	{
1183	if (ev_now () >= last_activity + ::conf.keepalive + 30)	1341	ev_tstamp when = last_activity + ::conf.keepalive - ev::now ();
		1342
		1343	if (when >= 0)
		1344	w.start (when);
		1345	else if (when < -15)
1184	{	1346	{
1185	reset_connection ();	1347	reset_connection ("keepalive overdue");
1186	establish_connection ();	1348	establish_connection ();
1187	}	1349	}
1188	else if (ev_now () < last_activity + ::conf.keepalive)
1189	w.start (last_activity + ::conf.keepalive - ev::now ());
1190	else if (conf->connectmode != conf_node::C_ONDEMAND	1350	else if (conf->connectmode != conf_node::C_ONDEMAND
1191	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1351	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1192	{	1352	{
		1353	w.start (3);
1193	send_ping (si);	1354	send_ping (si);
1194	w.start (5);
1195	}	1355	}
1196	else if (ev_now () < last_activity + ::conf.keepalive + 10)	1356	else if (when >= -10)
1197	// hold ondemand connections implicitly a few seconds longer	1357	// hold ondemand connections implicitly a few seconds longer
1198	// should delete octx, though, or something like that ;)	1358	// should delete octx, though, or something like that ;)
1199	w.start (last_activity + ::conf.keepalive + 10 - ev::now ());	1359	w.start (when + 10);
1200	else	1360	else
1201	reset_connection ();	1361	reset_connection ("keepalive timeout");
1202	}	1362	}
1203		1363
		1364	void
1204	void connection::send_connect_request (int id)	1365	connection::send_connect_request (int id)
1205	{	1366	{
1206	connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);	1367	connect_req_packet *p = new connect_req_packet (conf->id, id, THISNODE->protocols);
1207		1368
1208	slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id);	1369	slog (L_TRACE, "%s << PT_CONNECT_REQ(%s,p%02x)",
		1370	conf->nodename, vpn->conns[id - 1]->conf->nodename,
		1371	THISNODE->protocols);
1209	p->hmac_set (octx);	1372	p->hmac_set (octx);
1210	send_vpn_packet (p, si);	1373	send_vpn_packet (p, si);
1211		1374
1212	delete p;	1375	delete p;
1213	}	1376	}
1214		1377
		1378	void
1215	void connection::script_init_env (const char *ext)	1379	connection::script_init_env (const char *ext)
1216	{	1380	{
1217	char *env;	1381	char *env;
1218	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);	1382	asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1219	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);	1383	asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1220	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,	1384	asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1221	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,	1385	0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1222	conf->id & 0xff); putenv (env);	1386	conf->id & 0xff); putenv (env);
1223	}	1387	}
1224		1388
		1389	void
1225	void connection::script_init_connect_env ()	1390	connection::script_init_connect_env ()
1226	{	1391	{
1227	vpn->script_init_env ();	1392	vpn->script_init_env ();
1228		1393
1229	char *env;	1394	char *env;
1230	asprintf (&env, "DESTID=%d", conf->id); putenv (env);	1395	asprintf (&env, "DESTID=%d", conf->id); putenv (env);
		1396	asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1231	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1397	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1232	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1398	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1233	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1399	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1234	}	1400	}
1235		1401
		1402	inline const char *
1236	const char *connection::script_node_up ()	1403	connection::script_node_up ()
1237	{	1404	{
1238	script_init_connect_env ();	1405	script_init_connect_env ();
1239		1406
1240	putenv ((char *)"STATE=up");	1407	putenv ((char *)"STATE=up");
1241		1408
…		…
1246	::conf.script_node_up ? ::conf.script_node_up : "node-up");	1413	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1247		1414
1248	return filename;	1415	return filename;
1249	}	1416	}
1250		1417
		1418	inline const char *
		1419	connection::script_node_change ()
		1420	{
		1421	script_init_connect_env ();
		1422
		1423	putenv ((char *)"STATE=change");
		1424
		1425	char *filename;
		1426	asprintf (&filename,
		1427	"%s/%s",
		1428	confbase,
		1429	::conf.script_node_change ? ::conf.script_node_change : "node-change");
		1430
		1431	return filename;
		1432	}
		1433
		1434	inline const char *
1251	const char *connection::script_node_down ()	1435	connection::script_node_down ()
1252	{	1436	{
1253	script_init_connect_env ();	1437	script_init_connect_env ();
1254		1438
1255	putenv ((char *)"STATE=down");	1439	putenv ((char *)"STATE=down");
1256		1440
…		…
1262		1446
1263	return filename;	1447	return filename;
1264	}	1448	}
1265		1449
1266	connection::connection (struct vpn vpn, conf_node conf)	1450	connection::connection (struct vpn vpn, conf_node conf)
1267	: vpn(vpn), conf(conf)	1451	: vpn(vpn), conf(conf),
1268	, rekey (this, &connection::rekey_cb)
1269	, keepalive (this, &connection::keepalive_cb)
1270	, establish_connection (this, &connection::establish_connection_cb)
1271	#if ENABLE_DNS	1452	#if ENABLE_DNS
1272	, dns (0)	1453	dns (0),
1273	#endif	1454	#endif
		1455	data_queue(conf->max_ttl, conf->max_queue + 1),
		1456	vpn_queue(conf->max_ttl, conf->max_queue + 1)
1274	{	1457	{
		1458	rekey .set<connection, &connection::rekey_cb > (this);
		1459	keepalive .set<connection, &connection::keepalive_cb > (this);
		1460	establish_connection.set<connection, &connection::establish_connection_cb> (this);
		1461
		1462	last_establish_attempt = 0.;
1275	octx = ictx = 0;	1463	octx = ictx = 0;
1276	retry_cnt = 0;
1277		1464
1278	if (!conf->protocols) // make sure some protocol is enabled	1465	connectmode = conf->connectmode;
1279	conf->protocols = PROT_UDPv4;
1280		1466
1281	connectmode = conf_node::C_ALWAYS; // initial setting	1467	// queue a dummy packet to force an initial connection attempt
		1468	if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
		1469	vpn_queue.put (new net_packet);
		1470
1282	reset_connection ();	1471	reset_connection ("startup");
1283	}	1472	}
1284		1473
1285	connection::~connection ()	1474	connection::~connection ()
1286	{	1475	{
1287	shutdown ();	1476	shutdown ();
1288	}	1477	}
1289		1478
		1479	void
1290	void connection_init ()	1480	connection_init ()
1291	{	1481	{
1292	auth_rate_limiter.clear ();	1482	auth_rate_limiter.clear ();
1293	reset_rate_limiter.clear ();	1483	reset_rate_limiter.clear ();
1294	}	1484	}
1295		1485

Diff Legend

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

Comparing gvpe/src/connection.C (file contents): Revision 1.64 by pcg, Tue Dec 4 15:01:12 2007 UTC vs. Revision 1.109 by root, Fri Oct 11 07:56:07 2013 UTC

Diff Legend

Comparing gvpe/src/connection.C (file contents):
Revision 1.64 by pcg, Tue Dec 4 15:01:12 2007 UTC vs.
Revision 1.109 by root, Fri Oct 11 07:56:07 2013 UTC