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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.31 by pcg, Sat Mar 5 19:13:16 2005 UTC vs.
Revision 1.51 by pcg, Sun Aug 10 14:48:57 2008 UTC

…		…
1	/*	1	/*
2	vpn.C -- handle the protocol, encryption, handshaking etc.	2	vpn.C -- handle the protocol, encryption, handshaking etc.
3	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>	3	Copyright (C) 2003-2008 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. 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.
20	*/	30	*/
21		31
22	#include "config.h"	32	#include "config.h"
23		33
24	#include <list>	34	#include <list>
46		56
47	vpn network; // THE vpn (bad design...)	57	vpn network; // THE vpn (bad design...)
48		58
49	/////////////////////////////////////////////////////////////////////////////	59	/////////////////////////////////////////////////////////////////////////////
50		60
51	const char *vpn::script_if_up ()	61	static void inline
		62	set_tos (int fd, int &tos_prev, int tos)
		63	{
		64	#if defined(SOL_IP) && defined(IP_TOS)
		65	if (tos_prev == tos)
		66	return;
		67
		68	tos_prev = tos;
		69	setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		70	#endif
		71	}
		72
		73	void
		74	vpn::script_init_env ()
52	{	75	{
53	// the tunnel device mtu should be the physical mtu - overhead	76	// the tunnel device mtu should be the physical mtu - overhead
54	// the tricky part is rounding to the cipher key blocksize	77	// the tricky part is rounding to the cipher key blocksize
55	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	78	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
56	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	79	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
57	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	80	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
58	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	81	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
59		82
60	char *env;	83	char *env;
61	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);	84	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
62	asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env);
63	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
64	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);	85	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
65	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);	86	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
66	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);	87	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
67	asprintf (&env, "MTU=%d", mtu); putenv (env);	88	asprintf (&env, "MTU=%d", mtu); putenv (env);
68	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	89	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
69	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,	90	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
70	THISNODE->id & 0xff);
71	putenv (env);
72		91
		92	conns [THISNODE->id - 1]->script_init_env ("");
		93
		94	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		95	{
		96	char ext[16];
		97	snprintf (ext, 16, "_%d", (*c)->conf->id);
		98	(*c)->script_init_env (ext);
		99	}
		100	}
		101
		102	inline const char *
		103	vpn::script_if_init ()
		104	{
		105	script_init_env ();
		106
		107	return tap->if_up ();
		108	}
		109
		110	inline const char *
		111	vpn::script_if_up ()
		112	{
		113	script_init_env ();
		114
		115	char *filename;
		116	asprintf (&filename,
		117	"%s/%s",
		118	confbase,
73	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	119	::conf.script_if_up ? ::conf.script_if_up : "if-up");
		120
		121	return filename;
74	}	122	}
75		123
76	int	124	int
77	vpn::setup ()	125	vpn::setup ()
78	{	126	{
		127	int success = 0;
		128
		129	ipv4_tos = -1;
79	ipv4_fd = -1;	130	ipv4_fd = -1;
80		131
81	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	132	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
82	{	133	{
83	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	134	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
84		135
85	if (ipv4_fd < 0)	136	if (ipv4_fd < 0)
86	return -1;	137	return -1;
87		138
88	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	139	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		140	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
89		141
90	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	142	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
91	// this I really consider a linux bug. I am neither connected	143	// this I really consider a linux bug. I am neither connected
92	// nor do I fragment myself. Linux still sets DF and doesn't	144	// nor do I fragment myself. Linux still sets DF and doesn't
93	// fragment for me sometimes.	145	// fragment for me sometimes.
…		…
99		151
100	sockinfo si (THISNODE, PROT_IPv4);	152	sockinfo si (THISNODE, PROT_IPv4);
101		153
102	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	154	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
103	{	155	{
104	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	156	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
105	exit (EXIT_FAILURE);	157	exit (EXIT_FAILURE);
106	}	158	}
107		159
108	ipv4_ev_watcher.start (ipv4_fd, EVENT_READ);	160	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		161	++success;
109	}	162	}
		163	else
		164	THISNODE->protocols &= ~PROT_IPv4;
110		165
		166	udpv4_tos = -1;
111	udpv4_fd = -1;	167	udpv4_fd = -1;
112		168
113	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	169	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
114	{	170	{
115	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	171	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
116		172
117	if (udpv4_fd < 0)	173	if (udpv4_fd < 0)
118	return -1;	174	return -1;
119		175
120	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	176	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		177	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
121		178
122	// standard daemon practise...	179	// standard daemon practise...
123	{	180	{
124	int oval = 1;	181	int oval = 1;
125	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	182	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
137		194
138	sockinfo si (THISNODE, PROT_UDPv4);	195	sockinfo si (THISNODE, PROT_UDPv4);
139		196
140	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	197	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
141	{	198	{
142	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	199	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
143	exit (EXIT_FAILURE);	200	exit (EXIT_FAILURE);
144	}	201	}
145		202
146	udpv4_ev_watcher.start (udpv4_fd, EVENT_READ);	203	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		204	++success;
147	}	205	}
		206	else
		207	THISNODE->protocols &= ~PROT_UDPv4;
148		208
		209	icmpv4_tos = -1;
149	icmpv4_fd = -1;	210	icmpv4_fd = -1;
150		211
151	#if ENABLE_ICMP	212	#if ENABLE_ICMP
152	if (THISNODE->protocols & PROT_ICMPv4)	213	if (THISNODE->protocols & PROT_ICMPv4)
153	{	214	{
154	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	215	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
155		216
156	if (icmpv4_fd < 0)	217	if (icmpv4_fd < 0)
157	return -1;	218	return -1;
158		219
159	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	220	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		221	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
160		222
161	#ifdef ICMP_FILTER	223	#ifdef ICMP_FILTER
162	{	224	{
163	icmp_filter oval;	225	icmp_filter oval;
164	oval.data = 0xffffffff;	226	oval.data = 0xffffffff;
…		…
173	// this I really consider a linux bug. I am neither connected	235	// this I really consider a linux bug. I am neither connected
174	// nor do I fragment myself. Linux still sets DF and doesn't	236	// nor do I fragment myself. Linux still sets DF and doesn't
175	// fragment for me sometimes.	237	// fragment for me sometimes.
176	{	238	{
177	int oval = IP_PMTUDISC_DONT;	239	int oval = IP_PMTUDISC_DONT;
178	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	240	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
179	}	241	}
180	#endif	242	#endif
181		243
182	sockinfo si (THISNODE, PROT_ICMPv4);	244	sockinfo si (THISNODE, PROT_ICMPv4);
183		245
184	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	246	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
185	{	247	{
186	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	248	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
187	exit (EXIT_FAILURE);	249	exit (EXIT_FAILURE);
188	}	250	}
189		251
190	icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ);	252	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		253	++success;
191	}	254	}
192	#endif	255	#endif
193		256
194	tcpv4_fd = -1;	257	tcpv4_fd = -1;
195		258
…		…
200		263
201	if (tcpv4_fd < 0)	264	if (tcpv4_fd < 0)
202	return -1;	265	return -1;
203		266
204	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	267	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		268	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
205		269
206	// standard daemon practise...	270	// standard daemon practise...
207	{	271	{
208	int oval = 1;	272	int oval = 1;
209	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	273	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
211		275
212	sockinfo si (THISNODE, PROT_TCPv4);	276	sockinfo si (THISNODE, PROT_TCPv4);
213		277
214	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	278	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
215	{	279	{
216	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	280	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
217	exit (EXIT_FAILURE);	281	exit (EXIT_FAILURE);
218	}	282	}
219		283
220	if (listen (tcpv4_fd, 5))	284	if (listen (tcpv4_fd, 5))
221	{	285	{
222	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	286	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
223	exit (EXIT_FAILURE);	287	exit (EXIT_FAILURE);
224	}	288	}
225		289
226	tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ);	290	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		291	++success;
227	}	292	}
		293	else
		294	THISNODE->protocols &= ~PROT_TCPv4;
228	#endif	295	#endif
		296
		297	dnsv4_tos = -1;
		298	dnsv4_fd = -1;
229		299
230	#if ENABLE_DNS	300	#if ENABLE_DNS
231	if (THISNODE->protocols & PROT_DNSv4)	301	if (THISNODE->protocols & PROT_DNSv4)
232	{	302	{
233	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);	303	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
234		304
235	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	305	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
236		306
237	if (dnsv4_fd < 0)	307	if (dnsv4_fd < 0)
238	return -1;	308	return -1;
		309
		310	fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK);
		311	fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC);
		312
		313	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		314	// this I really consider a linux bug. I am neither connected
		315	// nor do I fragment myself. Linux still sets DF and doesn't
		316	// fragment for me sometimes.
		317	{
		318	int oval = IP_PMTUDISC_DONT;
		319	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		320	}
		321	# endif
239		322
240	// standard daemon practise...	323	// standard daemon practise...
241	{	324	{
242	int oval = 1;	325	int oval = 1;
243	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	326	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
247	THISNODE->dns_hostname ? THISNODE->dns_port : 0,	330	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
248	PROT_DNSv4);	331	PROT_DNSv4);
249		332
250	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))	333	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
251	{	334	{
252	slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));	335	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
253	exit (EXIT_FAILURE);	336	exit (EXIT_FAILURE);
254	}	337	}
255		338
256	dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ);	339	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		340	++success;
		341	}
		342	#endif
		343
		344	/////////////////////////////////////////////////////////////////////////////
		345
		346	if (!success)
257	}	347	{
258	#endif	348	slog (L_ERR, _("no protocols enabled, exiting."));
		349	exit (EXIT_FAILURE);
		350	}
		351
		352	reconnect_all ();
		353
		354	/////////////////////////////////////////////////////////////////////////////
259		355
260	tap = new tap_device ();	356	tap = new tap_device ();
261	if (!tap) //D this, of course, never catches	357	if (!tap) //D this, of course, never catches
262	{	358	{
263	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	359	slog (L_ERR, _("cannot create network interface '%s', exiting."), conf.ifname);
264	exit (EXIT_FAILURE);	360	exit (EXIT_FAILURE);
265	}	361	}
266		362
267	run_script (run_script_cb (this, &vpn::script_if_up), true);	363	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
268		364
		365	run_script_cb cb;
		366	cb.set<vpn, &vpn::script_if_init> (this);
		367
		368	if (tap->if_up () &&
		369	!run_script (cb, true))
		370	{
		371	slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
		372	tap->if_up ());
		373	exit (EXIT_FAILURE);
		374	}
		375
		376	cb.set<vpn, &vpn::script_if_up> (this);
		377	if (!run_script (cb, true))
		378	{
		379	slog (L_ERR, _("if-up command execution failed, exiting."));
		380	exit (EXIT_FAILURE);
		381	}
		382
269	tap_ev_watcher.start (tap->fd, EVENT_READ);	383	tap_ev_watcher.start (tap->fd, EV_READ);
270
271	reconnect_all ();
272		384
273	return 0;	385	return 0;
274	}	386	}
275		387
276	bool	388	bool
277	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	389	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
278	{	390	{
279	#if defined(SOL_IP) && defined(IP_TOS)	391	set_tos (ipv4_fd, ipv4_tos, tos);
280	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
281	#endif
282	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	392	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
283		393
284	return true;	394	return true;
285	}	395	}
286		396
…		…
309		419
310	#if ENABLE_ICMP	420	#if ENABLE_ICMP
311	bool	421	bool
312	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	422	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
313	{	423	{
314	#if defined(SOL_IP) && defined(IP_TOS)
315	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
316	#endif
317
318	pkt->unshift_hdr (4);	424	pkt->unshift_hdr (4);
319		425
320	icmp_header hdr = (icmp_header )&((*pkt)[0]);	426	icmp_header hdr = (icmp_header )&((*pkt)[0]);
321	hdr->type = ::conf.icmp_type;	427	hdr->type = ::conf.icmp_type;
322	hdr->code = 255;	428	hdr->code = 255;
323	hdr->checksum = 0;	429	hdr->checksum = 0;
324	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	430	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
325		431
		432	set_tos (icmpv4_fd, icmpv4_tos, tos);
326	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	433	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
327		434
328	return true;	435	return true;
329	}	436	}
330	#endif	437	#endif
331		438
332	bool	439	bool
333	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	440	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
334	{	441	{
335	#if defined(SOL_IP) && defined(IP_TOS)	442	set_tos (udpv4_fd, udpv4_tos, tos);
336	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
337	#endif
338	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	443	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
339		444
340	return true;	445	return true;
341	}	446	}
342		447
…		…
353	{	458	{
354	// broadcast, this is ugly, but due to the security policy	459	// broadcast, this is ugly, but due to the security policy
355	// we have to connect to all hosts...	460	// we have to connect to all hosts...
356	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	461	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
357	if ((*c)->conf != THISNODE)	462	if ((*c)->conf != THISNODE)
358	(*c)->inject_data_packet (pkt, true);	463	(*c)->inject_data_packet (pkt);
359	}	464	}
360	}	465	}
361		466
362	void	467	void
363	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	468	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
364	{	469	{
365	unsigned int src = pkt->src ();	470	unsigned int src = pkt->src ();
366	unsigned int dst = pkt->dst ();	471	unsigned int dst = pkt->dst ();
367		472
368	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	473	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
369	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	474	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
370		475
371	if (src == 0 \|\| src > conns.size ()	476	if (src == 0 \|\| src > conns.size ()
372	\|\| dst > conns.size ()	477	\|\| dst > conns.size ()
373	\|\| pkt->typ () >= vpn_packet::PT_MAX)	478	\|\| pkt->typ () >= vpn_packet::PT_MAX)
374	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	479	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
375	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	480	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
376	else if (dst > conns.size ())	481	else if (dst > conns.size ())
377	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	482	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
378	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	483	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
379	else	484	else
380	{	485	{
381	connection *c = conns[src - 1];	486	connection *c = conns[src - 1];
382		487
383	if (dst == 0)	488	if (dst == 0)
384	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	489	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
385	c->conf->nodename, (const char *)rsi);	490	c->conf->nodename, (const char *)rsi);
386	else if (dst != THISNODE->id)	491	else if (dst != THISNODE->id)
387	{	492	{
388	if (THISNODE->routerprio)	493	if (THISNODE->routerprio)
389	// the tos setting gets lost here. who cares.	494	// the tos setting gets lost here. who cares.
390	conns[dst - 1]->inject_vpn_packet (pkt);	495	conns[dst - 1]->inject_vpn_packet (pkt);
391	else	496	else
392	slog (L_WARN,	497	slog (L_WARN,
393	_("%s(%s): forwarding request (=> %s), but we are no router"),	498	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
394	c->conf->nodename, (const char *)rsi,	499	c->conf->nodename, (const char *)rsi,
395	conns[dst - 1]->conf->nodename);	500	conns[dst - 1]->conf->nodename);
396	}	501	}
397	else	502	else
398	c->recv_vpn_packet (pkt, rsi);	503	c->recv_vpn_packet (pkt, rsi);
…		…
404	{	509	{
405	switch (si.prot)	510	switch (si.prot)
406	{	511	{
407	case PROT_IPv4:	512	case PROT_IPv4:
408	return send_ipv4_packet (pkt, si, tos);	513	return send_ipv4_packet (pkt, si, tos);
		514
409	case PROT_UDPv4:	515	case PROT_UDPv4:
410	return send_udpv4_packet (pkt, si, tos);	516	return send_udpv4_packet (pkt, si, tos);
		517
411	#if ENABLE_TCP	518	#if ENABLE_TCP
412	case PROT_TCPv4:	519	case PROT_TCPv4:
413	return send_tcpv4_packet (pkt, si, tos);	520	return send_tcpv4_packet (pkt, si, tos);
414	#endif	521	#endif
415	#if ENABLE_ICMP	522	#if ENABLE_ICMP
…		…
418	#endif	525	#endif
419	#if ENABLE_DNS	526	#if ENABLE_DNS
420	case PROT_DNSv4:	527	case PROT_DNSv4:
421	return send_dnsv4_packet (pkt, si, tos);	528	return send_dnsv4_packet (pkt, si, tos);
422	#endif	529	#endif
423
424	default:	530	default:
425	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);	531	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
426	}	532	}
427		533
428	return false;	534	return false;
429	}	535	}
430		536
431	void	537	inline void
432	vpn::ipv4_ev (io_watcher &w, short revents)	538	vpn::ipv4_ev (ev::io &w, int revents)
433	{	539	{
434	if (revents & EVENT_READ)	540	if (revents & EV_READ)
435	{	541	{
436	vpn_packet *pkt = new vpn_packet;	542	vpn_packet *pkt = new vpn_packet;
437	struct sockaddr_in sa;	543	struct sockaddr_in sa;
438	socklen_t sa_len = sizeof (sa);	544	socklen_t sa_len = sizeof (sa);
439	int len;	545	int len;
…		…
452	recv_vpn_packet (pkt, si);	558	recv_vpn_packet (pkt, si);
453	}	559	}
454	else	560	else
455	{	561	{
456	// probably ECONNRESET or somesuch	562	// probably ECONNRESET or somesuch
457	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	563	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
458	}	564	}
459		565
460	delete pkt;	566	delete pkt;
461	}	567	}
462	else	568	else
463	{	569	{
464	slog (L_ERR,	570	slog (L_ERR,
465	_("FATAL: unknown revents %08x in socket, terminating\n"),	571	_("FATAL: unknown revents %08x in socket, exiting.\n"),
466	revents);	572	revents);
467	exit (EXIT_FAILURE);	573	exit (EXIT_FAILURE);
468	}	574	}
469	}	575	}
470		576
471	#if ENABLE_ICMP	577	#if ENABLE_ICMP
472	void	578	inline void
473	vpn::icmpv4_ev (io_watcher &w, short revents)	579	vpn::icmpv4_ev (ev::io &w, int revents)
474	{	580	{
475	if (revents & EVENT_READ)	581	if (revents & EV_READ)
476	{	582	{
477	vpn_packet *pkt = new vpn_packet;	583	vpn_packet *pkt = new vpn_packet;
478	struct sockaddr_in sa;	584	struct sockaddr_in sa;
479	socklen_t sa_len = sizeof (sa);	585	socklen_t sa_len = sizeof (sa);
480	int len;	586	int len;
…		…
500	}	606	}
501	}	607	}
502	else	608	else
503	{	609	{
504	// probably ECONNRESET or somesuch	610	// probably ECONNRESET or somesuch
505	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	611	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
506	}	612	}
507		613
508	delete pkt;	614	delete pkt;
509	}	615	}
510	else	616	else
511	{	617	{
512	slog (L_ERR,	618	slog (L_ERR,
513	_("FATAL: unknown revents %08x in socket, terminating\n"),	619	_("FATAL: unknown revents %08x in socket, exiting.\n"),
514	revents);	620	revents);
515	exit (EXIT_FAILURE);	621	exit (EXIT_FAILURE);
516	}	622	}
517	}	623	}
518	#endif	624	#endif
519		625
520	void	626	inline void
521	vpn::udpv4_ev (io_watcher &w, short revents)	627	vpn::udpv4_ev (ev::io &w, int revents)
522	{	628	{
523	if (revents & EVENT_READ)	629	if (revents & EV_READ)
524	{	630	{
525	vpn_packet *pkt = new vpn_packet;	631	vpn_packet *pkt = new vpn_packet;
526	struct sockaddr_in sa;	632	struct sockaddr_in sa;
527	socklen_t sa_len = sizeof (sa);	633	socklen_t sa_len = sizeof (sa);
528	int len;	634	int len;
…		…
538	recv_vpn_packet (pkt, si);	644	recv_vpn_packet (pkt, si);
539	}	645	}
540	else	646	else
541	{	647	{
542	// probably ECONNRESET or somesuch	648	// probably ECONNRESET or somesuch
543	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	649	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
544	}	650	}
545		651
546	delete pkt;	652	delete pkt;
547	}	653	}
548	else	654	else
549	{	655	{
550	slog (L_ERR,	656	slog (L_ERR,
551	_("FATAL: unknown revents %08x in socket, terminating\n"),	657	_("FATAL: unknown revents %08x in socket, exiting.\n"),
552	revents);	658	revents);
553	exit (EXIT_FAILURE);	659	exit (EXIT_FAILURE);
554	}	660	}
555	}	661	}
556		662
557	void	663	inline void
558	vpn::tap_ev (io_watcher &w, short revents)	664	vpn::tap_ev (ev::io &w, int revents)
559	{	665	{
560	if (revents & EVENT_READ)	666	if (revents & EV_READ)
561	{	667	{
562	/* process data */	668	/* process data */
563	tap_packet *pkt;	669	tap_packet *pkt;
564		670
565	pkt = tap->recv ();	671	pkt = tap->recv ();
…		…
594	}	700	}
595	else	701	else
596	abort ();	702	abort ();
597	}	703	}
598		704
599	void	705	inline void
600	vpn::event_cb (time_watcher &w)	706	vpn::event_cb (ev::timer &w, int)
601	{	707	{
602	if (events)	708	if (events)
603	{	709	{
604	if (events & EVENT_SHUTDOWN)	710	if (events & EVENT_SHUTDOWN)
605	{	711	{
606	slog (L_INFO, _("preparing shutdown..."));	712	slog (L_INFO, _("preparing shutdown..."));
607		713
608	shutdown_all ();	714	shutdown_all ();
609	remove_pid (conf.pidfilename);	715	remove_pid (conf.pidfilename);
610	slog (L_INFO, _("terminating"));	716	slog (L_INFO, _("exiting."));
611	exit (EXIT_SUCCESS);	717	exit (EXIT_SUCCESS);
612	}	718	}
613		719
614	if (events & EVENT_RECONNECT)	720	if (events & EVENT_RECONNECT)
615	{	721	{
616	slog (L_INFO, _("forced reconnect"));	722	slog (L_INFO, _("forced reconnect."));
617		723
618	reconnect_all ();	724	reconnect_all ();
619	}	725	}
620		726
621	events = 0;	727	events = 0;
…		…
637		743
638	conns.clear ();	744	conns.clear ();
639		745
640	connection_init ();	746	connection_init ();
641		747
642	for (configuration::node_vector::iterator i = conf.nodes.begin ();	748	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
643	i != conf.nodes.end (); ++i)	749	conns.push_back (new connection (this, *i));
644	{	750
645	connection conn = new connection (this, i);	751	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
646	conns.push_back (conn);
647	conn->establish_connection ();	752	(*c)->establish_connection ();
648	}
649	}	753	}
650		754
651	connection *vpn::find_router ()	755	bool vpn::can_direct (conf_node src, conf_node dst) const
652	{	756	{
653	u32 prio = 1;	757	return src != dst
		758	&& src->may_direct (dst)
		759	&& dst->may_direct (src)
		760	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		761	\|\| (src->protocols & dst->connectable_protocols ()));
		762	}
		763
		764	// only works for indirect and routed connections: find a router
		765	// from THISNODE to dst
		766	connection vpn::find_router_for (const connection dst)
		767	{
654	connection *router = 0;	768	connection *router = 0;
655		769
		770	// first try to find a router with a direct connection
		771	{
		772	u32 prio = 1;
		773
		774	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		775	{
		776	connection c = i;
		777
		778	if (c->conf->routerprio > prio
		779	&& c->conf != THISNODE
		780	&& c != dst
		781	&& can_direct (c->conf, dst->conf))
		782	{
		783	if (c->ictx && c->octx)
		784	{
		785	prio = c->conf->routerprio;
		786	router = c;
		787	}
		788	else
		789	c->establish_connection ();
		790	}
		791	}
		792	}
		793
		794	if (router)
		795	return router;
		796
		797	// second try find the router with the highest priority higher than ours
		798	{
		799	u32 prio = 1;
		800
		801	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		802	{
		803	connection c = i;
		804
		805	if (c->conf->routerprio > prio
		806	&& c->conf->routerprio > THISNODE->routerprio
		807	&& c != dst
		808	&& c->conf != THISNODE)
		809	{
		810	if (c->ictx && c->octx)
		811	{
		812	prio = c->conf->routerprio;
		813	router = c;
		814	}
		815	else
		816	c->establish_connection ();
		817	}
		818	}
		819	}
		820	return router;
		821	}
		822
		823	void vpn::connection_established (connection *c)
		824	{
656	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	825	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
657	{	826	{
658	connection c = i;	827	connection o = i;
659		828
660	if (c->conf->routerprio > prio	829	if (!o->is_direct
661	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	830	&& o->si.valid ()
662	&& c->ictx && c->octx	831	&& c->si != o->si
663	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	832	&& c == find_router_for (o))
664	{
665	prio = c->conf->routerprio;
666	router = c;
667	}	833	{
		834	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		835	o->conf->nodename, c->conf->nodename);
		836	o->rekey ();
		837	}
668	}	838	}
669
670	return router;
671	}	839	}
672		840
673	void vpn::send_connect_request (int id)	841	void vpn::send_connect_request (connection *c)
674	{	842	{
675	connection *c = find_router ();	843	connection *r = find_router_for (c);
676		844
677	if (c)	845	if (r)
		846	{
		847	slog (L_TRACE, _("%s: no way to connect, sending mediated connection request via %s."),
		848	c->conf->nodename, r->conf->nodename);
678	c->send_connect_request (id);	849	r->send_connect_request (c->conf->id);
		850	}
679	else	851	else
680	// no router found, aggressively connect to all routers	852	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect."),
681	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	853	c->conf->nodename);
682	if ((i)->conf->routerprio && (i)->conf != THISNODE)
683	(*i)->establish_connection ();
684	}	854	}
685		855
686	void	856	void
687	connection::dump_status ()	857	connection::dump_status ()
688	{	858	{
689	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	859	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
690	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	860	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
691	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	861	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
692	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	862	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
693	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	863	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
694	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
695	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
696	}	864	}
697		865
698	void	866	void
699	vpn::dump_status ()	867	vpn::dump_status ()
700	{	868	{
701	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	869	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
702		870
703	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	871	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
704	(*c)->dump_status ();	872	(*c)->dump_status ();
705		873
706	slog (L_NOTICE, _("END status dump"));	874	slog (L_NOTICE, _("END status dump"));
707	}	875	}
708		876
709	vpn::vpn (void)	877	vpn::vpn (void)
		878	{
710	: event (this, &vpn::event_cb)	879	event .set<vpn, &vpn::event_cb > (this);
711	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	880	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
712	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	881	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
713	#if ENABLE_TCP	882	#if ENABLE_TCP
714	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	883	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
715	#endif	884	#endif
716	#if ENABLE_ICMP	885	#if ENABLE_ICMP
717	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	886	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
718	#endif	887	#endif
719	#if ENABLE_DNS	888	#if ENABLE_DNS
720	, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)	889	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
721	#endif	890	#endif
722	, tap_ev_watcher (this, &vpn::tap_ev)	891	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
723	{
724	}	892	}
725		893
726	vpn::~vpn ()	894	vpn::~vpn ()
727	{	895	{
728	}	896	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.31 by pcg, Sat Mar 5 19:13:16 2005 UTC vs. Revision 1.51 by pcg, Sun Aug 10 14:48:57 2008 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.31 by pcg, Sat Mar 5 19:13:16 2005 UTC vs.
Revision 1.51 by pcg, Sun Aug 10 14:48:57 2008 UTC