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

Comparing gvpe/src/connection.C (file contents):
Revision 1.3 by pcg, Wed Apr 2 05:15:00 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	#if !HAVE_RAND_PSEUDO_BYTES	50	#include "netcompat.h"
41	# define RAND_pseudo_bytes RAND_bytes
42	#endif
43		51
44	#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	//////////////////////////////////////////////////////////////////////////////
45		103
46	struct crypto_ctx	104	struct crypto_ctx
47	{	105	{
48	EVP_CIPHER_CTX cctx;	106	EVP_CIPHER_CTX cctx;
49	HMAC_CTX hctx;	107	HMAC_CTX hctx;
50		108
51	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);
52	~crypto_ctx ();	110	~crypto_ctx ();
53	};	111	};
54		112
55	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)
56	{	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
57	EVP_CIPHER_CTX_init (&cctx);	145	EVP_CIPHER_CTX_init (&cctx);
58	EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc);	146	require (EVP_CipherInit_ex (&cctx, CIPHER (), 0, cipher_key, 0, enc));
59	HMAC_CTX_init (&hctx);	147	}
60	HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0);
61	}	148	}
62		149
63	crypto_ctx::~crypto_ctx ()	150	crypto_ctx::~crypto_ctx ()
64	{	151	{
65	EVP_CIPHER_CTX_cleanup (&cctx);	152	require (EVP_CIPHER_CTX_cleanup (&cctx));
66	HMAC_CTX_cleanup (&hctx);	153	HMAC_CTX_cleanup (&hctx);
67	}	154	}
68		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
69	static void	183	static void
70	rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h)	184	auth_hash (const auth_data &auth, auth_mac &mac)
71	{	185	{
72	EVP_MD_CTX ctx;	186	HMAC_CTX ctx;
73		187
74	EVP_MD_CTX_init (&ctx);	188	HMAC_CTX_init (&ctx);
75	EVP_DigestInit (&ctx, RSA_HASH);	189	require (HMAC_Init_ex (&ctx, auth.rsa.auth_key, sizeof (auth.rsa.auth_key), AUTH_DIGEST (), 0));
76	EVP_DigestUpdate(&ctx, &chg, sizeof chg);	190	require (HMAC_Update (&ctx, (const unsigned char *)&auth, sizeof auth));
77	EVP_DigestUpdate(&ctx, &id, sizeof id);	191	require (HMAC_Final (&ctx, (unsigned char *)&mac, 0));
78	EVP_DigestFinal (&ctx, (unsigned char *)&h, 0);
79	EVP_MD_CTX_cleanup (&ctx);	192	HMAC_CTX_cleanup (&ctx);
80	}	193	}
81		194
82	struct rsa_entry {	195	void
83	tstamp expire;	196	connection::generate_auth_data ()
84	rsaid id;
85	rsachallenge chg;
86	};
87
88	struct rsa_cache : list<rsa_entry>
89	{	197	{
90	void cleaner_cb (tstamp &ts); time_watcher cleaner;	198	if (auth_expire < ev_now ())
91
92	bool find (const rsaid &id, rsachallenge &chg)
93	{
94	for (iterator i = begin (); i != end (); ++i)
95	{
96	if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW)
97	{
98	memcpy (&chg, &i->chg, sizeof chg);
99
100	erase (i);
101	return true;
102	}
103	}
104
105	if (cleaner.at < NOW)
106	cleaner.start (NOW + RSA_TTL);
107
108	return false;
109	}
110
111	void gen (rsaid &id, rsachallenge &chg)
112	{
113	rsa_entry e;
114
115	RAND_bytes ((unsigned char *)&id, sizeof id);
116	RAND_bytes ((unsigned char *)&chg, sizeof chg);
117
118	e.expire = NOW + RSA_TTL;
119	e.id = id;
120	memcpy (&e.chg, &chg, sizeof chg);
121
122	push_back (e);
123
124	if (cleaner.at < NOW)
125	cleaner.start (NOW + RSA_TTL);
126	}
127
128	rsa_cache ()
129	: cleaner (this, &rsa_cache::cleaner_cb)
130	{ }	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);
131		204
132	} rsa_cache;	205	// eventual response data
133		206	curve25519_generate (rcv_ecdh_a, rcv_ecdh_b);
134	void rsa_cache::cleaner_cb (tstamp &ts)
135	{
136	if (empty ())
137	ts = TSTAMP_CANCEL;
138	else
139	{	207	}
140	ts = NOW + RSA_TTL;
141		208
142	for (iterator i = begin (); i != end (); )	209	// every use prolongs the expiry
143	if (i->expire <= NOW)	210	auth_expire = ev_now () + AUTH_TTL;
144	i = erase (i);
145	else
146	++i;
147	}
148	}	211	}
149		212
150	//////////////////////////////////////////////////////////////////////////////	213	//////////////////////////////////////////////////////////////////////////////
151		214
152	void pkt_queue::put (tap_packet *p)	215	pkt_queue::pkt_queue (double max_ttl, int max_queue)
		216	: max_ttl (max_ttl), max_queue (max_queue)
153	{	217	{
154	if (queue[i])	218	queue = new pkt [max_queue];
155	{
156	delete queue[i];
157	j = (j + 1) % QUEUEDEPTH;
158	}
159		219
160	queue[i] = p;
161
162	i = (i + 1) % QUEUEDEPTH;
163	}
164
165	tap_packet *pkt_queue::get ()
166	{
167	tap_packet *p = queue[j];
168
169	if (p)
170	{
171	queue[j] = 0;
172	j = (j + 1) % QUEUEDEPTH;
173	}
174
175	return p;
176	}
177
178	pkt_queue::pkt_queue ()
179	{
180	memset (queue, 0, sizeof (queue));
181	i = 0;	220	i = 0;
182	j = 0;	221	j = 0;
		222
		223	expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
183	}	224	}
184		225
185	pkt_queue::~pkt_queue ()	226	pkt_queue::~pkt_queue ()
186	{	227	{
187	for (i = QUEUEDEPTH; --i > 0; )	228	while (net_packet *p = get ())
		229	delete p;
		230
188	delete queue[i];	231	delete [] queue;
189	}	232	}
190		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
191	struct net_rateinfo {	290	struct net_rateinfo
		291	{
192	u32 host;	292	u32 host;
193	double pcnt, diff;	293	double pcnt, diff;
194	tstamp last;	294	tstamp last;
195	};	295	};
196		296
197	// 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.
198	// this implementation ("splay list" ;) is inefficient,	298	// this implementation ("splay list" ;) is inefficient,
199	// but low on resources.	299	// but low on resources.
200	struct net_rate_limiter : list<net_rateinfo>	300	struct net_rate_limiter : list<net_rateinfo>
201	{	301	{
202	static const double ALPHA = 1. - 1. / 90.; // allow bursts	302	# define NRL_ALPHA (1. - 1. / 600.) // allow bursts
203	static const double CUTOFF = 20.; // one event every CUTOFF seconds	303	# define NRL_CUTOFF 10. // one event every CUTOFF seconds
204	static const double EXPIRE = CUTOFF * 30.; // expire entries after this time	304	# define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time
		305	# define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value
205		306
206	bool can (const sockinfo &si) { return can((u32)si.host); }	307	bool can (const sockinfo &si) { return can((u32)si.host); }
207	bool can (u32 host);	308	bool can (u32 host);
208	};	309	};
209		310
210	net_rate_limiter auth_rate_limiter, reset_rate_limiter;	311	static net_rate_limiter auth_rate_limiter, reset_rate_limiter;
211		312
		313	bool
212	bool net_rate_limiter::can (u32 host)	314	net_rate_limiter::can (u32 host)
213	{	315	{
214	iterator i;	316	iterator i;
215		317
216	for (i = begin (); i != end (); )	318	for (i = begin (); i != end (); )
217	if (i->host == host)	319	if (i->host == host)
218	break;	320	break;
219	else if (i->last < NOW - EXPIRE)	321	else if (i->last < ev_now () - NRL_EXPIRE)
220	i = erase (i);	322	i = erase (i);
221	else	323	else
222	i++;	324	i++;
223		325
224	if (i == end ())	326	if (i == end ())
225	{	327	{
226	net_rateinfo ri;	328	net_rateinfo ri;
227		329
228	ri.host = host;	330	ri.host = host;
229	ri.pcnt = 1.;	331	ri.pcnt = 1.;
230	ri.diff = CUTOFF * (1. / (1. - ALPHA));	332	ri.diff = NRL_MAXDIF;
231	ri.last = NOW;	333	ri.last = ev_now ();
232		334
233	push_front (ri);	335	push_front (ri);
234		336
235	return true;	337	return true;
236	}	338	}
237	else	339	else
238	{	340	{
239	net_rateinfo ri (*i);	341	net_rateinfo ri (*i);
240	erase (i);	342	erase (i);
241		343
242	ri.pcnt = ri.pcnt * ALPHA;	344	ri.pcnt = ri.pcnt * NRL_ALPHA;
243	ri.diff = ri.diff * ALPHA + (NOW - ri.last);	345	ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
244		346
245	ri.last = NOW;	347	ri.last = ev_now ();
246		348
		349	double dif = ri.diff / ri.pcnt;
		350
247	bool send = ri.diff / ri.pcnt > CUTOFF;	351	bool send = dif > NRL_CUTOFF;
248		352
		353	if (dif > NRL_MAXDIF)
		354	{
		355	ri.pcnt = 1.;
		356	ri.diff = NRL_MAXDIF;
		357	}
249	if (send)	358	else if (send)
250	ri.pcnt++;	359	ri.pcnt++;
251		360
252	push_front (ri);	361	push_front (ri);
253		362
254	return send;	363	return send;
257		366
258	/////////////////////////////////////////////////////////////////////////////	367	/////////////////////////////////////////////////////////////////////////////
259		368
260	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];	369	unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE];
261		370
		371	void
262	void hmac_packet::hmac_gen (crypto_ctx *ctx)	372	hmac_packet::hmac_gen (crypto_ctx *ctx)
263	{	373	{
264	unsigned int xlen;	374	unsigned int xlen;
265		375
266	HMAC_CTX *hctx = &ctx->hctx;	376	HMAC_CTX *hctx = &ctx->hctx;
267		377
268	HMAC_Init_ex (hctx, 0, 0, 0, 0);	378	require (HMAC_Init_ex (hctx, 0, 0, 0, 0));
269	HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),	379	require (HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet),
270	len - sizeof (hmac_packet));	380	len - sizeof (hmac_packet)));
271	HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen);	381	require (HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen));
272	}	382	}
273		383
274	void	384	void
275	hmac_packet::hmac_set (crypto_ctx *ctx)	385	hmac_packet::hmac_set (crypto_ctx *ctx)
276	{	386	{
…		…
285	hmac_gen (ctx);	395	hmac_gen (ctx);
286		396
287	return !memcmp (hmac, hmac_digest, HMACLENGTH);	397	return !memcmp (hmac, hmac_digest, HMACLENGTH);
288	}	398	}
289		399
		400	void
290	void vpn_packet::set_hdr (ptype type, unsigned int dst)	401	vpn_packet::set_hdr (ptype type_, unsigned int dst)
291	{	402	{
292	this->type = type;	403	type = type_;
293		404
294	int src = THISNODE->id;	405	int src = THISNODE->id;
295		406
296	src1 = src;	407	src1 = src;
297	srcdst = ((src >> 8) << 4) \| (dst >> 8);	408	srcdst = ((src >> 8) << 4) \| (dst >> 8);
…		…
299	}	410	}
300		411
301	#define MAXVPNDATA (MAX_MTU - 6 - 6)	412	#define MAXVPNDATA (MAX_MTU - 6 - 6)
302	#define DATAHDR (sizeof (u32) + RAND_SIZE)	413	#define DATAHDR (sizeof (u32) + RAND_SIZE)
303		414
304	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
305	{	424	{
306	u8 data[MAXVPNDATA + DATAHDR]; // seqno
307
308	void setup (connection conn, int dst, u8 d, u32 len, u32 seqno);
309	tap_packet unpack (connection conn, u32 &seqno);
310	private:
311
312	const u32 data_hdr_size () const
313	{
314	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;	425	return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR;
315	}
316	};	426	}
		427	};
317		428
318	void	429	void
319	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)
320	{	431	{
321	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;	432	EVP_CIPHER_CTX *cctx = &conn->octx->cctx;
322	int outl = 0, outl2;	433	int outl = 0, outl2;
323	ptype type = PT_DATA_UNCOMPRESSED;	434	ptype type = PT_DATA_UNCOMPRESSED;
324		435
325	#if ENABLE_COMPRESSION	436	#if ENABLE_COMPRESSION
326	u8 cdata[MAX_MTU];	437	u8 cdata[MAX_MTU];
327	u32 cl;
328		438
		439	if (conn->features & FEATURE_COMPRESSION)
		440	{
329	cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);	441	u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
		442
330	if (cl)	443	if (cl)
331	{	444	{
332	type = PT_DATA_COMPRESSED;	445	type = PT_DATA_COMPRESSED;
333	d = cdata;	446	d = cdata;
334	l = cl + 2;	447	l = cl + 2;
335		448
336	d[0] = cl >> 8;	449	d[0] = cl >> 8;
337	d[1] = cl;	450	d[1] = cl;
		451	}
338	}	452	}
339	#endif	453	#endif
340		454
341	EVP_EncryptInit_ex (cctx, 0, 0, 0, 0);	455	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 1));
342		456
343	struct {	457	struct {
344	#if RAND_SIZE	458	#if RAND_SIZE
345	u8 rnd[RAND_SIZE];	459	u8 rnd[RAND_SIZE];
346	#endif	460	#endif
347	u32 seqno;	461	u32 seqno;
348	} datahdr;	462	} datahdr;
349		463
350	datahdr.seqno = ntohl (seqno);	464	datahdr.seqno = ntohl (seqno);
351	#if RAND_SIZE	465	#if RAND_SIZE
352	RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);	466	RAND_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE);
353	#endif	467	#endif
354		468
355	EVP_EncryptUpdate (cctx,	469	require (EVP_EncryptUpdate (cctx,
356	(unsigned char *) data + outl, &outl2,	470	(unsigned char *) data + outl, &outl2,
357	(unsigned char *) &datahdr, DATAHDR);	471	(unsigned char *) &datahdr, DATAHDR));
358	outl += outl2;	472	outl += outl2;
359		473
360	EVP_EncryptUpdate (cctx,	474	require (EVP_EncryptUpdate (cctx,
361	(unsigned char *) data + outl, &outl2,	475	(unsigned char *) data + outl, &outl2,
362	(unsigned char *) d, l);	476	(unsigned char *) d, l));
363	outl += outl2;	477	outl += outl2;
364		478
365	EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2);	479	require (EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2));
366	outl += outl2;	480	outl += outl2;
367		481
368	len = outl + data_hdr_size ();	482	len = outl + data_hdr_size ();
369		483
370	set_hdr (type, dst);	484	set_hdr (type, dst);
…		…
379	int outl = 0, outl2;	493	int outl = 0, outl2;
380	tap_packet *p = new tap_packet;	494	tap_packet *p = new tap_packet;
381	u8 *d;	495	u8 *d;
382	u32 l = len - data_hdr_size ();	496	u32 l = len - data_hdr_size ();
383		497
384	EVP_DecryptInit_ex (cctx, 0, 0, 0, 0);	498	require (EVP_CipherInit_ex (cctx, 0, 0, 0, 0, 0));
385		499
386	#if ENABLE_COMPRESSION	500	#if ENABLE_COMPRESSION
387	u8 cdata[MAX_MTU];	501	u8 cdata[MAX_MTU];
388		502
389	if (type == PT_DATA_COMPRESSED)	503	if (type == PT_DATA_COMPRESSED)
…		…
391	else	505	else
392	#endif	506	#endif
393	d = &(*p)[6 + 6 - DATAHDR];	507	d = &(*p)[6 + 6 - DATAHDR];
394		508
395	/* 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 */
396	EVP_DecryptUpdate (cctx,	510	require (EVP_DecryptUpdate (cctx,
397	d, &outl2,	511	d, &outl2,
398	(unsigned char *)&data, len - data_hdr_size ());	512	(unsigned char *)&data, len - data_hdr_size ()));
399	outl += outl2;	513	outl += outl2;
400		514
401	EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2);	515	require (EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2));
402	outl += outl2;	516	outl += outl2;
403		517
404	seqno = ntohl ((u32 )(d + RAND_SIZE));	518	seqno = ntohl ((u32 )(d + RAND_SIZE));
405		519
406	id2mac (dst () ? dst() : THISNODE->id, p->dst);	520	id2mac (dst () ? dst() : THISNODE->id, p->dst);
…		…
431	}	545	}
432	};	546	};
433		547
434	struct config_packet : vpn_packet	548	struct config_packet : vpn_packet
435	{	549	{
436	// actually, hmaclen cannot be checked because the hmac
437	// field comes before this data, so peers with other
438	// hmacs simply will not work.
439	u8 prot_major, prot_minor, randsize, hmaclen;	550	u8 prot_major, prot_minor, randsize;
440	u8 flags, challengelen, pad2, pad3;	551	u8 flags, features, pad6, pad7, pad8;
441	u32 cipher_nid, digest_nid, hmac_nid;	552	u32 cipher_nid, mac_nid, auth_nid;
442
443	const u8 curflags () const
444	{
445	return 0x80
446	\| (ENABLE_COMPRESSION ? 0x01 : 0x00);
447	}
448		553
449	void setup (ptype type, int dst);	554	void setup (ptype type, int dst);
450	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	}
451	};	571	};
452		572
		573	void
453	void config_packet::setup (ptype type, int dst)	574	config_packet::setup (ptype type, int dst)
454	{	575	{
455	prot_major = PROTOCOL_MAJOR;	576	prot_major = PROTOCOL_MAJOR;
456	prot_minor = PROTOCOL_MINOR;	577	prot_minor = PROTOCOL_MINOR;
457	randsize = RAND_SIZE;	578	randsize = RAND_SIZE;
458	hmaclen = HMACLENGTH;	579	flags = 0;
459	flags = curflags ();	580	features = get_features ();
460	challengelen = sizeof (rsachallenge);
461		581
462	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));	582	cipher_nid = htonl (EVP_CIPHER_nid (CIPHER ()));
463	digest_nid = htonl (EVP_MD_type (RSA_HASH));
464	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 ()));
465		585
466	len = sizeof (*this) - sizeof (net_packet);	586	len = sizeof (*this) - sizeof (net_packet);
467	set_hdr (type, dst);	587	set_hdr (type, dst);
468	}	588	}
469		589
		590	bool
470	bool config_packet::chk_config () const	591	config_packet::chk_config () const
471	{	592	{
472	return prot_major == PROTOCOL_MAJOR	593	if (prot_major != PROTOCOL_MAJOR)
473	&& randsize == RAND_SIZE	594	slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR);
474	&& hmaclen == HMACLENGTH	595	else if (randsize != RAND_SIZE)
475	&& flags == curflags ()	596	slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE);
476	&& challengelen == sizeof (rsachallenge)
477	&& cipher_nid == htonl (EVP_CIPHER_nid (CIPHER))	597	else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER ())))
478	&& digest_nid == htonl (EVP_MD_type (RSA_HASH))	598	slog (L_WARN, _("cipher algo mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER ()));
479	&& hmac_nid == htonl (EVP_MD_type (DIGEST));	599	else if (mac_nid != htonl (EVP_MD_type (MAC_DIGEST ())))
480	}	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 ()));
		603	else
		604	return true;
481		605
		606	return false;
		607	}
		608
482	struct auth_req_packet : config_packet	609	struct auth_req_packet : config_packet // UNPROTECTED
483	{	610	{
484	char magic[8];	611	char magic[8];
485	u8 initiate; // false if this is just an automatic reply	612	u8 initiate; // false if this is just an automatic reply
486	u8 protocols; // supported protocols (will get patches on forward)	613	u8 protocols; // supported protocols (will be patched on forward)
487	u8 pad2, pad3;	614	u8 pad2, pad3;
488	rsaid id;	615	auth_encr encr;
489	rsaencrdata encr;
490		616
491	auth_req_packet (int dst, bool initiate_, u8 protocols_)	617	auth_req_packet (int dst, bool initiate_, u8 protocols_)
492	{	618	{
493	config_packet::setup (PT_AUTH_REQ, dst);	619	config_packet::setup (PT_AUTH_REQ, dst);
494	strncpy (magic, MAGIC, 8);	620	memcpy (magic, MAGIC, 8);
495	initiate = !!initiate_;	621	initiate = !!initiate_;
496	protocols = protocols_;	622	protocols = protocols_;
497		623
498	len = sizeof (*this) - sizeof (net_packet);	624	len = sizeof (*this) - sizeof (net_packet);
499	}	625	}
500	};	626	};
501		627
502	struct auth_res_packet : config_packet	628	struct auth_res_packet : config_packet // UNPROTECTED
503	{	629	{
504	rsaid id;
505	u8 pad1, pad2, pad3;
506	u8 response_len; // encrypted length
507	rsaresponse response;	630	auth_response response;
508		631
509	auth_res_packet (int dst)	632	auth_res_packet (int dst)
510	{	633	{
511	config_packet::setup (PT_AUTH_RES, dst);	634	config_packet::setup (PT_AUTH_RES, dst);
512		635
…		…
546	};	669	};
547		670
548	/////////////////////////////////////////////////////////////////////////////	671	/////////////////////////////////////////////////////////////////////////////
549		672
550	void	673	void
		674	connection::connection_established (const sockinfo &rsi)
		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
		700	if (ictx && octx)
		701	{
		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);
		705
		706	keepalive.start (::conf.keepalive);
		707
		708	// send queued packets
		709	if (ictx && octx)
		710	{
		711	while (tap_packet p = (tap_packet )data_queue.get ())
		712	{
		713	if (p->len) send_data_packet (p);
		714	delete p;
		715	}
		716
		717	while (vpn_packet p = (vpn_packet )vpn_queue.get ())
		718	{
		719	if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
		720	delete p;
		721	}
		722	}
		723
		724	vpn->connection_established (this);
		725	}
		726	#if 0
		727	else
		728	{
		729	retry_cnt = 0;
		730	establish_connection.start (5);
		731	keepalive.stop ();
		732	rekey.stop ();
		733	}
		734	#endif
		735	}
		736
		737	void
551	connection::reset_dstaddr ()	738	connection::reset_si ()
552	{	739	{
		740	if (vpn->can_direct (THISNODE, conf))
		741	protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
		742	else
		743	{
		744	slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
		745	protocol = 0;
		746	}
		747
553	si.set (conf);	748	si.set (conf, protocol);
		749
		750	is_direct = si.valid ();
		751	}
		752
		753	// ensure sockinfo is valid, forward if necessary
		754	const sockinfo &
		755	connection::forward_si (const sockinfo &si) const
		756	{
		757	if (!si.valid ())
		758	{
		759	connection *r = vpn->find_router_for (this);
		760
		761	if (r)
		762	{
		763	slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
		764	conf->nodename, r->conf->nodename);
		765	return r->si;
		766	}
		767	else
		768	slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
		769	conf->nodename);
		770	}
		771
		772	return si;
		773	}
		774
		775	void
		776	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		777	{
		778	if (!vpn->send_vpn_packet (pkt, si, tos))
		779	reset_connection ();
554	}	780	}
555		781
556	void	782	void
557	connection::send_ping (const sockinfo &si, u8 pong)	783	connection::send_ping (const sockinfo &si, u8 pong)
558	{	784	{
559	ping_packet *pkt = new ping_packet;	785	ping_packet *pkt = new ping_packet;
560		786
561	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);
562	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);	790	send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
563		791
564	delete pkt;	792	delete pkt;
565	}	793	}
566		794
…		…
581	void	809	void
582	connection::send_auth_request (const sockinfo &si, bool initiate)	810	connection::send_auth_request (const sockinfo &si, bool initiate)
583	{	811	{
584	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);
585		813
586	protocol = best_protocol (THISNODE->protocols & conf->protocols);	814	generate_auth_data ();
		815	auth_encrypt (conf->rsa_key, snd_auth, pkt->encr);
587		816
588	// mask out protocols we cannot establish
589	if (!conf->udp_port) protocol &= ~PROT_UDPv4;
590	if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
591
592	if (protocol)
593	{
594	rsachallenge chg;
595
596	rsa_cache.gen (pkt->id, chg);
597
598	if (0 > RSA_public_encrypt (sizeof chg,
599	(unsigned char )&chg, (unsigned char )&pkt->encr,
600	conf->rsa_key, RSA_PKCS1_OAEP_PADDING))
601	fatal ("RSA_public_encrypt error");
602
603	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);
604
605	send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly	818	send_vpn_packet (pkt, si, IPTOS_RELIABILITY \| IPTOS_LOWDELAY); // rsa is very very costly
606		819
607	delete pkt;	820	delete pkt;
608	}
609	else
610	; // silently fail
611	}	821	}
612		822
613	void	823	void
614	connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg)	824	connection::send_auth_response (const sockinfo &si)
615	{	825	{
616	auth_res_packet *pkt = new auth_res_packet (conf->id);	826	auth_res_packet *pkt = new auth_res_packet (conf->id);
617		827
618	pkt->id = id;	828	auth_hash (rcv_auth, pkt->response.mac);
		829	memcpy (pkt->response.ecdh, rcv_ecdh_b, sizeof (rcv_ecdh_b));
619		830
620	rsa_hash (id, chg, pkt->response);
621
622	pkt->hmac_set (octx);
623
624	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);
625
626	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
627		833
628	delete pkt;	834	delete pkt;
629	}	835	}
630		836
631	void	837	void
632	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)	838	connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
633	{	839	{
634	slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n",	840	slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s,p%02x)", conf->nodename,
635	conf->id, rid, (const char *)rsi);	841	vpn->conns[rid - 1]->conf->nodename, (const char *)rsi,
		842	conf->protocols);
636		843
637	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);
638		845
639	r->hmac_set (octx);	846	r->hmac_set (octx);
640	send_vpn_packet (r, si);	847	send_vpn_packet (r, si);
641		848
642	delete r;	849	delete r;
643	}	850	}
644		851
645	void	852	inline void
646	connection::establish_connection_cb (tstamp &ts)	853	connection::establish_connection_cb (ev::timer &w, int revents)
647	{	854	{
648	if (ictx \|\| conf == THISNODE	855	if (!(ictx && octx)
		856	&& conf != THISNODE
649	\|\| connectmode == conf_node::C_NEVER	857	&& connectmode != conf_node::C_NEVER
650	\|\| connectmode == conf_node::C_DISABLED)	858	&& connectmode != conf_node::C_DISABLED
651	ts = TSTAMP_CANCEL;	859	&& !w.is_active ())
652	else if (ts <= NOW)
653	{	860	{
654	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
655		862	// and stop trying. should probably be handled by a per-connection expire handler.
656	if (retry_int < 3600 * 8)	863	if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
657	retry_cnt++;
658
659	ts = NOW + retry_int;
660
661	if (conf->hostname)
662	{	864	{
663	reset_dstaddr ();	865	reset_connection ();
664	if (si.host && auth_rate_limiter.can (si))	866	return;
665	{
666	if (retry_cnt < 4)
667	send_auth_request (si, true);
668	else
669	send_ping (si, 0);
670	}	867	}
		868
		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));
		874
		875	reset_si ();
		876
		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);
		883	vpn->send_connect_request (this);
671	}	884	}
672	else	885	else
673	vpn->connect_request (conf->id);	886	{
		887	if (si.valid ())
		888	slog (L_DEBUG, _("%s: sending direct connection request to %s."),
		889	conf->nodename, (const char *)si);
		890
		891	const sockinfo &dsi = forward_si (si);
		892
		893	slow = slow \|\| (dsi.prot & PROT_SLOW);
		894
		895	if (dsi.valid () && auth_rate_limiter.can (dsi))
		896	{
		897	if (retry_cnt < 4)
		898	send_auth_request (dsi, true);
		899	else
		900	send_ping (dsi, 0);
		901	}
		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);
674	}	912	}
675	}	913	}
676		914
677	void	915	void
678	connection::reset_connection ()	916	connection::reset_connection ()
…		…
681	{	919	{
682	slog (L_INFO, _("%s(%s): connection lost"),	920	slog (L_INFO, _("%s(%s): connection lost"),
683	conf->nodename, (const char *)si);	921	conf->nodename, (const char *)si);
684		922
685	if (::conf.script_node_down)	923	if (::conf.script_node_down)
686	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	}
687	}	929	}
688		930
689	delete ictx; ictx = 0;	931	delete ictx; ictx = 0;
690	delete octx; octx = 0;	932	delete octx; octx = 0;
691		933
692	si.host= 0;	934	si.host = 0;
693		935
		936	have_snd_auth = false;
		937	have_rcv_auth = false;
		938	auth_expire = 0.;
		939
694	last_activity = 0;	940	last_activity = 0.;
		941	//last_si_change = 0.;
695	retry_cnt = 0;	942	retry_cnt = 0;
696		943
697	rekey.reset ();	944	rekey.stop ();
698	keepalive.reset ();	945	keepalive.stop ();
699	establish_connection.reset ();	946	establish_connection.stop ();
700	}	947	}
701		948
702	void	949	void
703	connection::shutdown ()	950	connection::shutdown ()
704	{	951	{
…		…
706	send_reset (si);	953	send_reset (si);
707		954
708	reset_connection ();	955	reset_connection ();
709	}	956	}
710		957
711	void	958	// poor-man's rekeying
712	connection::rekey_cb (tstamp &ts)	959	inline void
		960	connection::rekey_cb (ev::timer &w, int revents)
713	{	961	{
714	ts = TSTAMP_CANCEL;
715
716	reset_connection ();	962	reset_connection ();
717	establish_connection ();	963	establish_connection ();
718	}	964	}
719		965
720	void	966	void
721	connection::send_data_packet (tap_packet *pkt, bool broadcast)	967	connection::send_data_packet (tap_packet *pkt)
722	{	968	{
723	vpndata_packet *p = new vpndata_packet;	969	vpndata_packet *p = new vpndata_packet;
724	int tos = 0;	970	int tos = 0;
725		971
726	if (conf->inherit_tos	972	// I am not hilarious about peeking into packets, but so be it.
727	&& (pkt)[12] == 0x08 && (pkt)[13] == 0x00 // IP	973	if (conf->inherit_tos && pkt->is_ipv4 ())
728	&& ((*pkt)[14] & 0xf0) == 0x40) // IPv4
729	tos = (*pkt)[15] & IPTOS_TOS_MASK;	974	tos = (*pkt)[15] & IPTOS_TOS_MASK;
730		975
731	p->setup (this, broadcast ? 0 : conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs	976	p->setup (this, conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs
732	send_vpn_packet (p, si, tos);	977	send_vpn_packet (p, si, tos);
733		978
734	delete p;	979	delete p;
735		980
736	if (oseqno > MAX_SEQNO)	981	if (oseqno > MAX_SEQNO)
737	rekey ();	982	rekey ();
738	}	983	}
739		984
740	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
741	connection::inject_data_packet (tap_packet *pkt, bool broadcast)	996	connection::inject_data_packet (tap_packet *pkt)
742	{	997	{
743	if (ictx && octx)	998	if (ictx && octx)
744	send_data_packet (pkt, broadcast);	999	send_data_packet (pkt);
745	else	1000	else
746	{	1001	{
747	if (!broadcast)//DDDD
748	queue.put (new tap_packet (*pkt));	1002	data_queue.put (new tap_packet (*pkt));
		1003	post_inject_queue ();
		1004	}
		1005	}
749		1006
750	establish_connection ();	1007	void
		1008	connection::inject_vpn_packet (vpn_packet *pkt, int tos)
		1009	{
		1010	if (ictx && octx)
		1011	send_vpn_packet (pkt, si, tos);
		1012	else
		1013	{
		1014	vpn_queue.put ((vpn_packet )new data_packet ((data_packet *)pkt));
		1015	post_inject_queue ();
751	}	1016	}
752	}	1017	}
753		1018
754	void	1019	void
755	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	1020	connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
756	{	1021	{
757	last_activity = NOW;	1022	last_activity = ev_now ();
758		1023
759	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.",
760	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;
761		1029
762	switch (pkt->typ ())	1030	switch (pkt->typ ())
763	{	1031	{
764	case vpn_packet::PT_PING:	1032	case vpn_packet::PT_PING:
		1033	slog (L_TRACE, "%s >> PT_PING", conf->nodename);
		1034
765	// we send pings instead of auth packets after some retries,	1035	// we send pings instead of auth packets after some retries,
766	// so reset the retry counter and establish a connection	1036	// so reset the retry counter and establish a connection
767	// when we receive a ping.	1037	// when we receive a ping.
768	if (!ictx)	1038	if (!ictx)
769	{	1039	{
770	if (auth_rate_limiter.can (rsi))	1040	if (auth_rate_limiter.can (rsi))
771	send_auth_request (rsi, true);	1041	send_auth_request (rsi, true);
772	}	1042	}
773	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.
774	send_ping (rsi, 1); // pong	1046	send_ping (rsi, 1); // pong
775		1047
776	break;	1048	break;
777		1049
778	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 ();
779	break;	1056	break;
780		1057
781	case vpn_packet::PT_RESET:	1058	case vpn_packet::PT_RESET:
782	{	1059	{
783	reset_connection ();	1060	reset_connection ();
784		1061
785	config_packet p = (config_packet ) pkt;	1062	config_packet p = (config_packet ) pkt;
786		1063
787	if (!p->chk_config ())	1064	if (!p->chk_config ())
788	{	1065	{
789	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"),	1066	slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
790	conf->nodename, (const char *)rsi);	1067	conf->nodename, (const char *)rsi);
791	connectmode = conf_node::C_DISABLED;	1068	connectmode = conf_node::C_DISABLED;
792	}	1069	}
793	else if (connectmode == conf_node::C_ALWAYS)	1070	else if (connectmode == conf_node::C_ALWAYS)
794	establish_connection ();	1071	establish_connection ();
…		…
796	break;	1073	break;
797		1074
798	case vpn_packet::PT_AUTH_REQ:	1075	case vpn_packet::PT_AUTH_REQ:
799	if (auth_rate_limiter.can (rsi))	1076	if (auth_rate_limiter.can (rsi))
800	{	1077	{
801	auth_req_packet p = (auth_req_packet ) pkt;	1078	auth_req_packet p = (auth_req_packet )pkt;
802		1079
803	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);
804		1083
805	if (p->chk_config () && !strncmp (p->magic, MAGIC, 8))	1084	if (p->chk_config () && !memcmp (p->magic, MAGIC, 8))
806	{	1085	{
807	if (p->prot_minor != PROTOCOL_MINOR)	1086	if (p->prot_minor != PROTOCOL_MINOR)
808	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."),
809	conf->nodename, (const char *)rsi,	1088	conf->nodename, (const char *)rsi,
810	PROTOCOL_MINOR, conf->nodename, p->prot_minor);	1089	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
811		1090
812	if (p->initiate)	1091	if (p->initiate)
813	send_auth_request (rsi, false);	1092	send_auth_request (rsi, false);
814		1093
815	rsachallenge k;	1094	auth_data auth;
816		1095
817	if (0 > RSA_private_decrypt (sizeof (p->encr),	1096	if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
818	(unsigned char )&p->encr, (unsigned char )&k,	1097	{
819	::conf.rsa_key, RSA_PKCS1_OAEP_PADDING))
820	slog (L_ERR, _("%s(%s): challenge illegal or corrupted"),	1098	slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"),
821	conf->nodename, (const char *)rsi);	1099	conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0));
		1100	}
822	else	1101	else
823	{	1102	{
824	retry_cnt = 0;	1103	bool chg = !have_rcv_auth \|\| memcmp (&rcv_auth, &auth, sizeof auth);
825	establish_connection.set (NOW + 8); //? ;)
826	keepalive.reset ();
827	rekey.reset ();
828		1104
829	delete ictx;
830	ictx = 0;	1105	rcv_auth = auth;
		1106	have_rcv_auth = true;
831		1107
832	delete octx;	1108	send_auth_response (rsi);
833		1109
834	octx = new crypto_ctx (k, 1);	1110	if (chg)
835	oseqno = ntohl ((u32 )&k[CHG_SEQNO]) & 0x7fffffff;	1111	{
836
837	conf->protocols = p->protocols;	1112	conf->protocols = p->protocols;
838	send_auth_response (rsi, p->id, k);	1113	features = p->features & config_packet::get_features ();
839		1114
		1115	connection_established (rsi);
840	break;	1116	}
841	}	1117	}
		1118
		1119	break;
842	}	1120	}
		1121	else
		1122	slog (L_WARN, _("%s(%s): protocol mismatch."),
		1123	conf->nodename, (const char *)rsi);
843		1124
844	send_reset (rsi);	1125	send_reset (rsi);
845	}	1126	}
846		1127
847	break;	1128	break;
848		1129
849	case vpn_packet::PT_AUTH_RES:	1130	case vpn_packet::PT_AUTH_RES:
850	{	1131	{
851	auth_res_packet p = (auth_res_packet ) pkt;	1132	auth_res_packet p = (auth_res_packet )pkt;
852		1133
853	slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id);	1134	slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
854		1135
855	if (p->chk_config ())	1136	if (p->chk_config ())
856	{	1137	{
857	if (p->prot_minor != PROTOCOL_MINOR)	1138	if (memcmp (&p->response.mac, snd_auth_mac, sizeof (snd_auth_mac)))
858	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
859	conf->nodename, (const char *)rsi,
860	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
861
862	rsachallenge chg;
863
864	if (!rsa_cache.find (p->id, chg))
865	slog (L_ERR, _("%s(%s): unrequested auth response"),
866	conf->nodename, (const char *)rsi);
867	else
868	{	1139	{
869	crypto_ctx *cctx = new crypto_ctx (chg, 0);	1140	slog (L_ERR, _("%s(%s): unrequested or outdated auth response, ignoring."),
870
871	if (!p->hmac_chk (cctx))
872	slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
873	"could be an attack, or just corruption or an synchronization error"),
874	conf->nodename, (const char *)rsi);	1141	conf->nodename, (const char *)rsi);
875	else
876	{
877	rsaresponse h;
878
879	rsa_hash (p->id, chg, h);
880
881	if (!memcmp ((u8 )&h, (u8 )p->response, sizeof h))
882	{
883	prot_minor = p->prot_minor;
884
885	delete ictx; ictx = cctx;
886
887	iseqno.reset (ntohl ((u32 )&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
888
889	si = rsi;
890
891	rekey.set (NOW + ::conf.rekey);
892	keepalive.set (NOW + ::conf.keepalive);
893
894	// send queued packets
895	while (tap_packet *p = queue.get ())
896	{
897	send_data_packet (p);
898	delete p;
899	}
900
901	connectmode = conf->connectmode;
902
903	slog (L_INFO, _("%s(%s): %s connection established, protocol version %d.%d"),
904	conf->nodename, (const char *)rsi,
905	strprotocol (protocol),
906	p->prot_major, p->prot_minor);
907
908	if (::conf.script_node_up)
909	run_script (run_script_cb (this, &connection::script_node_up), false);
910
911	break;
912	}
913	else
914	slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
915	conf->nodename, (const char *)rsi);
916	}
917
918	delete cctx;
919	}	1142	}
		1143	else if (!have_snd_auth)
		1144	{
		1145	if (p->prot_minor != PROTOCOL_MINOR)
		1146	slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
		1147	conf->nodename, (const char *)rsi,
		1148	PROTOCOL_MINOR, conf->nodename, p->prot_minor);
		1149
		1150	prot_minor = p->prot_minor;
		1151	memcpy (snd_ecdh_b, p->response.ecdh, sizeof (snd_ecdh_b));
		1152
		1153	have_snd_auth = true;
		1154	connection_established (rsi);
		1155	}
		1156
		1157	break;
920	}	1158	}
921	}	1159	}
922		1160
923	send_reset (rsi);	1161	send_reset (rsi);
924	break;	1162	break;
…		…
933		1171
934	if (ictx && octx)	1172	if (ictx && octx)
935	{	1173	{
936	vpndata_packet p = (vpndata_packet )pkt;	1174	vpndata_packet p = (vpndata_packet )pkt;
937		1175
938	if (rsi == si)	1176	if (!p->hmac_chk (ictx))
		1177	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
		1178	"could be an attack, or just corruption or a synchronization error."),
		1179	conf->nodename, (const char *)rsi);
		1180	else
939	{	1181	{
940	if (!p->hmac_chk (ictx))
941	slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
942	"could be an attack, or just corruption or an synchronization error"),
943	conf->nodename, (const char *)rsi);
944	else	1182	u32 seqno;
		1183	tap_packet *d = p->unpack (this, seqno);
		1184	int seqclass = iseqno.seqno_classify (seqno);
		1185
		1186	if (seqclass == 0) // ok
945	{	1187	{
946	u32 seqno;	1188	vpn->tap->send (d);
947	tap_packet *d = p->unpack (this, seqno);
948		1189
949	if (iseqno.recv_ok (seqno))	1190	if (si != rsi)
950	{	1191	{
951	vpn->tap->send (d);	1192	// fast re-sync on source address changes, useful especially for tcp/ip
		1193	//if (last_si_change < ev_now () + 5.)
		1194	// {
		1195	slog (L_INFO, _("%s(%s): changing socket address to %s."),
		1196	conf->nodename, (const char )si, (const char )rsi);
952		1197
953	if (p->dst () == 0) // re-broadcast	1198	si = rsi;
954	for (vpn::conns_vector::iterator i = vpn->conns.begin (); i != vpn->conns.end (); ++i)	1199
		1200	if (::conf.script_node_change)
955	{	1201	{
956	connection c = i;	1202	run_script_cb *cb = new run_script_cb;
957		1203	cb->set<connection, &connection::script_node_change> (this);
958	if (c->conf != THISNODE && c->conf != conf)	1204	run_script_queued (cb, _("node-change command execution failed, continuing."));
959	c->inject_data_packet (d);
960	}	1205	}
961		1206
		1207	// }
962	delete d;	1208	//else
963		1209	// slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
964	break;	1210	// conf->nodename, (const char )si, (const char )rsi);
965	}	1211	}
966	}	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;
967	}	1228	}
968	else
969	slog (L_ERR, _("received data packet from unknown source %s"), (const char *)rsi);
970	}	1229	}
971		1230
972	send_reset (rsi);	1231	send_reset (rsi);
973	break;	1232	break;
974		1233
975	case vpn_packet::PT_CONNECT_REQ:	1234	case vpn_packet::PT_CONNECT_REQ:
976	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1235	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
977	{	1236	{
978	connect_req_packet p = (connect_req_packet ) pkt;	1237	connect_req_packet p = (connect_req_packet )pkt;
979		1238
980	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 ())
981	conf->protocols = p->protocols;
982	connection *c = vpn->conns[p->id - 1];
983
984	slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
985	conf->id, p->id, c->ictx && c->octx);
986
987	if (c->ictx && c->octx)
988	{	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	{
989	// send connect_info packets to both sides, in case one is	1251	// send connect_info packets to both sides, in case one is
990	// behind a nat firewall (or both ;)	1252	// behind a nat firewall (or both ;)
991	c->send_connect_info (conf->id, si, conf->protocols);	1253	c->send_connect_info (conf->id, si, conf->protocols);
992	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 ();
993	}	1258	}
		1259	else
		1260	slog (L_WARN,
		1261	_("received authenticated connection request from unknown node #%d, config file mismatch?"),
		1262	p->id);
994	}	1263	}
995		1264
996	break;	1265	break;
997		1266
998	case vpn_packet::PT_CONNECT_INFO:	1267	case vpn_packet::PT_CONNECT_INFO:
999	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))	1268	if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1000	{	1269	{
1001	connect_info_packet p = (connect_info_packet ) pkt;	1270	connect_info_packet p = (connect_info_packet )pkt;
1002		1271
1003	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 ())
1004	conf->protocols = p->protocols;	1273	{
1005	connection *c = vpn->conns[p->id - 1];	1274	connection *c = vpn->conns[p->id - 1];
1006		1275
1007	slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",	1276	c->conf->protocols = p->protocols;
1008	conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);	1277	protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
		1278	p->si.upgrade_protocol (protocol, c->conf);
1009		1279
		1280	slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s,protocols=%02x,protocol=%02x,upgradable=%02x) [%d]",
		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);
		1288
		1289	const sockinfo &dsi = forward_si (p->si);
		1290
		1291	if (dsi.valid ())
1010	c->send_auth_request (p->si, 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);
1011	}	1302	}
1012		1303
1013	break;	1304	break;
1014		1305
1015	default:	1306	default:
1016	send_reset (rsi);	1307	send_reset (rsi);
1017	break;	1308	break;
1018	}	1309	}
1019	}	1310	}
1020		1311
1021	void connection::keepalive_cb (tstamp &ts)	1312	inline void
		1313	connection::keepalive_cb (ev::timer &w, int revents)
1022	{	1314	{
1023	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)
1024	{	1320	{
1025	reset_connection ();	1321	reset_connection ();
1026	establish_connection ();	1322	establish_connection ();
1027	}	1323	}
1028	else if (NOW < last_activity + ::conf.keepalive)
1029	ts = last_activity + ::conf.keepalive;
1030	else if (conf->connectmode != conf_node::C_ONDEMAND	1324	else if (conf->connectmode != conf_node::C_ONDEMAND
1031	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)	1325	\|\| THISNODE->connectmode != conf_node::C_ONDEMAND)
1032	{	1326	{
		1327	w.start (3);
1033	send_ping (si);	1328	send_ping (si);
1034	ts = NOW + 5;
1035	}	1329	}
		1330	else if (when >= -10)
		1331	// hold ondemand connections implicitly a few seconds longer
		1332	// should delete octx, though, or something like that ;)
		1333	w.start (when + 10);
1036	else	1334	else
1037	reset_connection ();	1335	reset_connection ();
1038	}	1336	}
1039		1337
		1338	void
1040	void connection::connect_request (int id)	1339	connection::send_connect_request (int id)
1041	{	1340	{
1042	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);
1043		1342
1044	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);
1045	p->hmac_set (octx);	1346	p->hmac_set (octx);
1046	send_vpn_packet (p, si);	1347	send_vpn_packet (p, si);
1047		1348
1048	delete p;	1349	delete p;
1049	}	1350	}
1050		1351
1051	void connection::script_node ()	1352	void
		1353	connection::script_init_env (const char *ext)
1052	{	1354	{
1053	vpn->script_if_up ();
1054
1055	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;
1056	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);
1057	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);	1371	asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1058	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);	1372	asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1059	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);	1373	asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1060	}	1374	}
1061		1375
		1376	inline const char *
1062	const char *connection::script_node_up ()	1377	connection::script_node_up ()
1063	{	1378	{
1064	script_node ();	1379	script_init_connect_env ();
1065		1380
1066	putenv ("STATE=up");	1381	putenv ((char *)"STATE=up");
1067		1382
		1383	char *filename;
		1384	asprintf (&filename,
		1385	"%s/%s",
		1386	confbase,
1068	return ::conf.script_node_up ? ::conf.script_node_up : "node-up";	1387	::conf.script_node_up ? ::conf.script_node_up : "node-up");
1069	}
1070		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 *
1071	const char *connection::script_node_down ()	1409	connection::script_node_down ()
1072	{	1410	{
1073	script_node ();	1411	script_init_connect_env ();
1074		1412
1075	putenv ("STATE=down");	1413	putenv ((char *)"STATE=down");
1076		1414
1077	return ::conf.script_node_up ? ::conf.script_node_down : "node-down";	1415	char *filename;
1078	}	1416	asprintf (&filename,
		1417	"%s/%s",
		1418	confbase,
		1419	::conf.script_node_down ? ::conf.script_node_down : "node-down");
1079		1420
1080	// send a vpn packet out to other hosts	1421	return filename;
1081	void
1082	connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
1083	{
1084	switch (protocol)
1085	{
1086	case PROT_IPv4:
1087	vpn->send_ipv4_packet (pkt, si, tos);
1088	break;
1089
1090	case PROT_UDPv4:
1091	vpn->send_udpv4_packet (pkt, si, tos);
1092	break;
1093
1094	case PROT_TCPv4:
1095	vpn->send_tcpv4_packet (pkt, si, tos);
1096	break;
1097	}
1098	}	1422	}
1099		1423
1100	connection::connection(struct vpn *vpn_)	1424	connection::connection (struct vpn vpn, conf_node conf)
1101	: vpn(vpn_)	1425	: vpn(vpn), conf(conf),
1102	, rekey (this, &connection::rekey_cb)	1426	#if ENABLE_DNS
1103	, 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);
1104	, establish_connection (this, &connection::establish_connection_cb)	1434	establish_connection.set<connection, &connection::establish_connection_cb> (this);
1105	{	1435
		1436	last_establish_attempt = 0.;
1106	octx = ictx = 0;	1437	octx = ictx = 0;
1107	retry_cnt = 0;
1108		1438
1109	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
1110	reset_connection ();	1445	reset_connection ();
1111	}	1446	}
1112		1447
1113	connection::~connection ()	1448	connection::~connection ()
1114	{	1449	{
1115	shutdown ();	1450	shutdown ();
1116	}	1451	}
1117		1452
		1453	void
1118	void connection_init ()	1454	connection_init ()
1119	{	1455	{
1120	auth_rate_limiter.clear ();	1456	auth_rate_limiter.clear ();
1121	reset_rate_limiter.clear ();	1457	reset_rate_limiter.clear ();
1122	}	1458	}
1123		1459

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Comparing gvpe/src/connection.C (file contents): Revision 1.3 by pcg, Wed Apr 2 05:15:00 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 1.3 by pcg, Wed Apr 2 05:15:00 2003 UTC vs.
Revision 1.100 by root, Wed Jul 17 05:34:17 2013 UTC