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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.32 by pcg, Mon Mar 7 01:31:26 2005 UTC vs.
Revision 1.50 by pcg, Sun Aug 10 02:49:21 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	ipv4_tos = -1;
79	ipv4_fd = -1;	128	ipv4_fd = -1;
80		129
81	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	130	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
82	{	131	{
83	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	132	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
84		133
85	if (ipv4_fd < 0)	134	if (ipv4_fd < 0)
86	return -1;	135	return -1;
87		136
88	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	137	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		138	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
89		139
90	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	140	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
91	// this I really consider a linux bug. I am neither connected	141	// this I really consider a linux bug. I am neither connected
92	// nor do I fragment myself. Linux still sets DF and doesn't	142	// nor do I fragment myself. Linux still sets DF and doesn't
93	// fragment for me sometimes.	143	// fragment for me sometimes.
…		…
99		149
100	sockinfo si (THISNODE, PROT_IPv4);	150	sockinfo si (THISNODE, PROT_IPv4);
101		151
102	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	152	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
103	{	153	{
104	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	154	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
105	exit (EXIT_FAILURE);	155	exit (EXIT_FAILURE);
106	}	156	}
107		157
108	ipv4_ev_watcher.start (ipv4_fd, EVENT_READ);	158	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
109	}	159	}
110		160
		161	udpv4_tos = -1;
111	udpv4_fd = -1;	162	udpv4_fd = -1;
112		163
113	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	164	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
114	{	165	{
115	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	166	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
116		167
117	if (udpv4_fd < 0)	168	if (udpv4_fd < 0)
118	return -1;	169	return -1;
119		170
120	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	171	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		172	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
121		173
122	// standard daemon practise...	174	// standard daemon practise...
123	{	175	{
124	int oval = 1;	176	int oval = 1;
125	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	177	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
137		189
138	sockinfo si (THISNODE, PROT_UDPv4);	190	sockinfo si (THISNODE, PROT_UDPv4);
139		191
140	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	192	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
141	{	193	{
142	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	194	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
143	exit (EXIT_FAILURE);	195	exit (EXIT_FAILURE);
144	}	196	}
145		197
146	udpv4_ev_watcher.start (udpv4_fd, EVENT_READ);	198	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
147	}	199	}
148		200
		201	icmpv4_tos = -1;
149	icmpv4_fd = -1;	202	icmpv4_fd = -1;
150		203
151	#if ENABLE_ICMP	204	#if ENABLE_ICMP
152	if (THISNODE->protocols & PROT_ICMPv4)	205	if (THISNODE->protocols & PROT_ICMPv4)
153	{	206	{
154	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	207	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
155		208
156	if (icmpv4_fd < 0)	209	if (icmpv4_fd < 0)
157	return -1;	210	return -1;
158		211
159	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	212	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		213	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
160		214
161	#ifdef ICMP_FILTER	215	#ifdef ICMP_FILTER
162	{	216	{
163	icmp_filter oval;	217	icmp_filter oval;
164	oval.data = 0xffffffff;	218	oval.data = 0xffffffff;
…		…
173	// this I really consider a linux bug. I am neither connected	227	// this I really consider a linux bug. I am neither connected
174	// nor do I fragment myself. Linux still sets DF and doesn't	228	// nor do I fragment myself. Linux still sets DF and doesn't
175	// fragment for me sometimes.	229	// fragment for me sometimes.
176	{	230	{
177	int oval = IP_PMTUDISC_DONT;	231	int oval = IP_PMTUDISC_DONT;
178	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	232	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
179	}	233	}
180	#endif	234	#endif
181		235
182	sockinfo si (THISNODE, PROT_ICMPv4);	236	sockinfo si (THISNODE, PROT_ICMPv4);
183		237
184	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	238	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
185	{	239	{
186	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	240	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
187	exit (EXIT_FAILURE);	241	exit (EXIT_FAILURE);
188	}	242	}
189		243
190	icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ);	244	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
191	}	245	}
192	#endif	246	#endif
193		247
194	tcpv4_fd = -1;	248	tcpv4_fd = -1;
195		249
…		…
200		254
201	if (tcpv4_fd < 0)	255	if (tcpv4_fd < 0)
202	return -1;	256	return -1;
203		257
204	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	258	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		259	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
205		260
206	// standard daemon practise...	261	// standard daemon practise...
207	{	262	{
208	int oval = 1;	263	int oval = 1;
209	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	264	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
211		266
212	sockinfo si (THISNODE, PROT_TCPv4);	267	sockinfo si (THISNODE, PROT_TCPv4);
213		268
214	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	269	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
215	{	270	{
216	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	271	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
217	exit (EXIT_FAILURE);	272	exit (EXIT_FAILURE);
218	}	273	}
219		274
220	if (listen (tcpv4_fd, 5))	275	if (listen (tcpv4_fd, 5))
221	{	276	{
222	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	277	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
223	exit (EXIT_FAILURE);	278	exit (EXIT_FAILURE);
224	}	279	}
225		280
226	tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ);	281	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
227	}	282	}
228	#endif	283	#endif
		284
		285	dnsv4_tos = -1;
		286	dnsv4_fd = -1;
229		287
230	#if ENABLE_DNS	288	#if ENABLE_DNS
231	if (THISNODE->protocols & PROT_DNSv4)	289	if (THISNODE->protocols & PROT_DNSv4)
232	{	290	{
233	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);	291	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
…		…
235	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	293	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
236		294
237	if (dnsv4_fd < 0)	295	if (dnsv4_fd < 0)
238	return -1;	296	return -1;
239		297
		298	fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK);
		299	fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC);
		300
240	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	301	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
241	// this I really consider a linux bug. I am neither connected	302	// this I really consider a linux bug. I am neither connected
242	// nor do I fragment myself. Linux still sets DF and doesn't	303	// nor do I fragment myself. Linux still sets DF and doesn't
243	// fragment for me sometimes.	304	// fragment for me sometimes.
244	{	305	{
245	int oval = IP_PMTUDISC_DONT;	306	int oval = IP_PMTUDISC_DONT;
246	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	307	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
247	}	308	}
248	#endif	309	# endif
249		310
250	// standard daemon practise...	311	// standard daemon practise...
251	{	312	{
252	int oval = 1;	313	int oval = 1;
253	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	314	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
257	THISNODE->dns_hostname ? THISNODE->dns_port : 0,	318	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
258	PROT_DNSv4);	319	PROT_DNSv4);
259		320
260	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))	321	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
261	{	322	{
262	slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));	323	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
263	exit (EXIT_FAILURE);	324	exit (EXIT_FAILURE);
264	}	325	}
265		326
266	dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ);	327	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
267	}	328	}
268	#endif	329	#endif
		330
		331	/////////////////////////////////////////////////////////////////////////////
		332
		333	reconnect_all ();
		334
		335	/////////////////////////////////////////////////////////////////////////////
269		336
270	tap = new tap_device ();	337	tap = new tap_device ();
271	if (!tap) //D this, of course, never catches	338	if (!tap) //D this, of course, never catches
272	{	339	{
273	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	340	slog (L_ERR, _("cannot create network interface '%s', exiting."), conf.ifname);
274	exit (EXIT_FAILURE);	341	exit (EXIT_FAILURE);
275	}	342	}
276		343
277	run_script (run_script_cb (this, &vpn::script_if_up), true);	344	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
278		345
		346	run_script_cb cb;
		347	cb.set<vpn, &vpn::script_if_init> (this);
		348
		349	if (tap->if_up () &&
		350	!run_script (cb, true))
		351	{
		352	slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
		353	tap->if_up ());
		354	exit (EXIT_FAILURE);
		355	}
		356
		357	cb.set<vpn, &vpn::script_if_up> (this);
		358	if (!run_script (cb, true))
		359	{
		360	slog (L_ERR, _("if-up command execution failed, exiting."));
		361	exit (EXIT_FAILURE);
		362	}
		363
279	tap_ev_watcher.start (tap->fd, EVENT_READ);	364	tap_ev_watcher.start (tap->fd, EV_READ);
280
281	reconnect_all ();
282		365
283	return 0;	366	return 0;
284	}	367	}
285		368
286	bool	369	bool
287	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	370	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
288	{	371	{
289	#if defined(SOL_IP) && defined(IP_TOS)	372	set_tos (ipv4_fd, ipv4_tos, tos);
290	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
291	#endif
292	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	373	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
293		374
294	return true;	375	return true;
295	}	376	}
296		377
…		…
319		400
320	#if ENABLE_ICMP	401	#if ENABLE_ICMP
321	bool	402	bool
322	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	403	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
323	{	404	{
324	#if defined(SOL_IP) && defined(IP_TOS)
325	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
326	#endif
327
328	pkt->unshift_hdr (4);	405	pkt->unshift_hdr (4);
329		406
330	icmp_header hdr = (icmp_header )&((*pkt)[0]);	407	icmp_header hdr = (icmp_header )&((*pkt)[0]);
331	hdr->type = ::conf.icmp_type;	408	hdr->type = ::conf.icmp_type;
332	hdr->code = 255;	409	hdr->code = 255;
333	hdr->checksum = 0;	410	hdr->checksum = 0;
334	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	411	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
335		412
		413	set_tos (icmpv4_fd, icmpv4_tos, tos);
336	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	414	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
337		415
338	return true;	416	return true;
339	}	417	}
340	#endif	418	#endif
341		419
342	bool	420	bool
343	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	421	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
344	{	422	{
345	#if defined(SOL_IP) && defined(IP_TOS)	423	set_tos (udpv4_fd, udpv4_tos, tos);
346	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
347	#endif
348	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	424	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
349		425
350	return true;	426	return true;
351	}	427	}
352		428
…		…
363	{	439	{
364	// broadcast, this is ugly, but due to the security policy	440	// broadcast, this is ugly, but due to the security policy
365	// we have to connect to all hosts...	441	// we have to connect to all hosts...
366	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	442	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
367	if ((*c)->conf != THISNODE)	443	if ((*c)->conf != THISNODE)
368	(*c)->inject_data_packet (pkt, true);	444	(*c)->inject_data_packet (pkt);
369	}	445	}
370	}	446	}
371		447
372	void	448	void
373	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	449	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
374	{	450	{
375	unsigned int src = pkt->src ();	451	unsigned int src = pkt->src ();
376	unsigned int dst = pkt->dst ();	452	unsigned int dst = pkt->dst ();
377		453
378	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	454	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
379	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	455	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
380		456
381	if (src == 0 \|\| src > conns.size ()	457	if (src == 0 \|\| src > conns.size ()
382	\|\| dst > conns.size ()	458	\|\| dst > conns.size ()
383	\|\| pkt->typ () >= vpn_packet::PT_MAX)	459	\|\| pkt->typ () >= vpn_packet::PT_MAX)
384	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	460	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
385	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	461	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
386	else if (dst > conns.size ())	462	else if (dst > conns.size ())
387	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	463	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
388	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	464	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
389	else	465	else
390	{	466	{
391	connection *c = conns[src - 1];	467	connection *c = conns[src - 1];
392		468
393	if (dst == 0)	469	if (dst == 0)
394	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	470	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
395	c->conf->nodename, (const char *)rsi);	471	c->conf->nodename, (const char *)rsi);
396	else if (dst != THISNODE->id)	472	else if (dst != THISNODE->id)
397	{	473	{
398	if (THISNODE->routerprio)	474	if (THISNODE->routerprio)
399	// the tos setting gets lost here. who cares.	475	// the tos setting gets lost here. who cares.
400	conns[dst - 1]->inject_vpn_packet (pkt);	476	conns[dst - 1]->inject_vpn_packet (pkt);
401	else	477	else
402	slog (L_WARN,	478	slog (L_WARN,
403	_("%s(%s): forwarding request (=> %s), but we are no router"),	479	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
404	c->conf->nodename, (const char *)rsi,	480	c->conf->nodename, (const char *)rsi,
405	conns[dst - 1]->conf->nodename);	481	conns[dst - 1]->conf->nodename);
406	}	482	}
407	else	483	else
408	c->recv_vpn_packet (pkt, rsi);	484	c->recv_vpn_packet (pkt, rsi);
…		…
414	{	490	{
415	switch (si.prot)	491	switch (si.prot)
416	{	492	{
417	case PROT_IPv4:	493	case PROT_IPv4:
418	return send_ipv4_packet (pkt, si, tos);	494	return send_ipv4_packet (pkt, si, tos);
		495
419	case PROT_UDPv4:	496	case PROT_UDPv4:
420	return send_udpv4_packet (pkt, si, tos);	497	return send_udpv4_packet (pkt, si, tos);
		498
421	#if ENABLE_TCP	499	#if ENABLE_TCP
422	case PROT_TCPv4:	500	case PROT_TCPv4:
423	return send_tcpv4_packet (pkt, si, tos);	501	return send_tcpv4_packet (pkt, si, tos);
424	#endif	502	#endif
425	#if ENABLE_ICMP	503	#if ENABLE_ICMP
…		…
428	#endif	506	#endif
429	#if ENABLE_DNS	507	#if ENABLE_DNS
430	case PROT_DNSv4:	508	case PROT_DNSv4:
431	return send_dnsv4_packet (pkt, si, tos);	509	return send_dnsv4_packet (pkt, si, tos);
432	#endif	510	#endif
433
434	default:	511	default:
435	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);	512	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
436	}	513	}
437		514
438	return false;	515	return false;
439	}	516	}
440		517
441	void	518	inline void
442	vpn::ipv4_ev (io_watcher &w, short revents)	519	vpn::ipv4_ev (ev::io &w, int revents)
443	{	520	{
444	if (revents & EVENT_READ)	521	if (revents & EV_READ)
445	{	522	{
446	vpn_packet *pkt = new vpn_packet;	523	vpn_packet *pkt = new vpn_packet;
447	struct sockaddr_in sa;	524	struct sockaddr_in sa;
448	socklen_t sa_len = sizeof (sa);	525	socklen_t sa_len = sizeof (sa);
449	int len;	526	int len;
…		…
462	recv_vpn_packet (pkt, si);	539	recv_vpn_packet (pkt, si);
463	}	540	}
464	else	541	else
465	{	542	{
466	// probably ECONNRESET or somesuch	543	// probably ECONNRESET or somesuch
467	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	544	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
468	}	545	}
469		546
470	delete pkt;	547	delete pkt;
471	}	548	}
472	else	549	else
473	{	550	{
474	slog (L_ERR,	551	slog (L_ERR,
475	_("FATAL: unknown revents %08x in socket, terminating\n"),	552	_("FATAL: unknown revents %08x in socket, exiting.\n"),
476	revents);	553	revents);
477	exit (EXIT_FAILURE);	554	exit (EXIT_FAILURE);
478	}	555	}
479	}	556	}
480		557
481	#if ENABLE_ICMP	558	#if ENABLE_ICMP
482	void	559	inline void
483	vpn::icmpv4_ev (io_watcher &w, short revents)	560	vpn::icmpv4_ev (ev::io &w, int revents)
484	{	561	{
485	if (revents & EVENT_READ)	562	if (revents & EV_READ)
486	{	563	{
487	vpn_packet *pkt = new vpn_packet;	564	vpn_packet *pkt = new vpn_packet;
488	struct sockaddr_in sa;	565	struct sockaddr_in sa;
489	socklen_t sa_len = sizeof (sa);	566	socklen_t sa_len = sizeof (sa);
490	int len;	567	int len;
…		…
510	}	587	}
511	}	588	}
512	else	589	else
513	{	590	{
514	// probably ECONNRESET or somesuch	591	// probably ECONNRESET or somesuch
515	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	592	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
516	}	593	}
517		594
518	delete pkt;	595	delete pkt;
519	}	596	}
520	else	597	else
521	{	598	{
522	slog (L_ERR,	599	slog (L_ERR,
523	_("FATAL: unknown revents %08x in socket, terminating\n"),	600	_("FATAL: unknown revents %08x in socket, exiting.\n"),
524	revents);	601	revents);
525	exit (EXIT_FAILURE);	602	exit (EXIT_FAILURE);
526	}	603	}
527	}	604	}
528	#endif	605	#endif
529		606
530	void	607	inline void
531	vpn::udpv4_ev (io_watcher &w, short revents)	608	vpn::udpv4_ev (ev::io &w, int revents)
532	{	609	{
533	if (revents & EVENT_READ)	610	if (revents & EV_READ)
534	{	611	{
535	vpn_packet *pkt = new vpn_packet;	612	vpn_packet *pkt = new vpn_packet;
536	struct sockaddr_in sa;	613	struct sockaddr_in sa;
537	socklen_t sa_len = sizeof (sa);	614	socklen_t sa_len = sizeof (sa);
538	int len;	615	int len;
…		…
548	recv_vpn_packet (pkt, si);	625	recv_vpn_packet (pkt, si);
549	}	626	}
550	else	627	else
551	{	628	{
552	// probably ECONNRESET or somesuch	629	// probably ECONNRESET or somesuch
553	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	630	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
554	}	631	}
555		632
556	delete pkt;	633	delete pkt;
557	}	634	}
558	else	635	else
559	{	636	{
560	slog (L_ERR,	637	slog (L_ERR,
561	_("FATAL: unknown revents %08x in socket, terminating\n"),	638	_("FATAL: unknown revents %08x in socket, exiting.\n"),
562	revents);	639	revents);
563	exit (EXIT_FAILURE);	640	exit (EXIT_FAILURE);
564	}	641	}
565	}	642	}
566		643
567	void	644	inline void
568	vpn::tap_ev (io_watcher &w, short revents)	645	vpn::tap_ev (ev::io &w, int revents)
569	{	646	{
570	if (revents & EVENT_READ)	647	if (revents & EV_READ)
571	{	648	{
572	/* process data */	649	/* process data */
573	tap_packet *pkt;	650	tap_packet *pkt;
574		651
575	pkt = tap->recv ();	652	pkt = tap->recv ();
…		…
604	}	681	}
605	else	682	else
606	abort ();	683	abort ();
607	}	684	}
608		685
609	void	686	inline void
610	vpn::event_cb (time_watcher &w)	687	vpn::event_cb (ev::timer &w, int)
611	{	688	{
612	if (events)	689	if (events)
613	{	690	{
614	if (events & EVENT_SHUTDOWN)	691	if (events & EVENT_SHUTDOWN)
615	{	692	{
616	slog (L_INFO, _("preparing shutdown..."));	693	slog (L_INFO, _("preparing shutdown..."));
617		694
618	shutdown_all ();	695	shutdown_all ();
619	remove_pid (conf.pidfilename);	696	remove_pid (conf.pidfilename);
620	slog (L_INFO, _("terminating"));	697	slog (L_INFO, _("exiting."));
621	exit (EXIT_SUCCESS);	698	exit (EXIT_SUCCESS);
622	}	699	}
623		700
624	if (events & EVENT_RECONNECT)	701	if (events & EVENT_RECONNECT)
625	{	702	{
626	slog (L_INFO, _("forced reconnect"));	703	slog (L_INFO, _("forced reconnect."));
627		704
628	reconnect_all ();	705	reconnect_all ();
629	}	706	}
630		707
631	events = 0;	708	events = 0;
…		…
647		724
648	conns.clear ();	725	conns.clear ();
649		726
650	connection_init ();	727	connection_init ();
651		728
652	for (configuration::node_vector::iterator i = conf.nodes.begin ();	729	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
653	i != conf.nodes.end (); ++i)	730	conns.push_back (new connection (this, *i));
654	{	731
655	connection conn = new connection (this, i);	732	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
656	conns.push_back (conn);
657	conn->establish_connection ();	733	(*c)->establish_connection ();
658	}
659	}	734	}
660		735
661	connection *vpn::find_router ()	736	bool vpn::can_direct (conf_node src, conf_node dst) const
662	{	737	{
663	u32 prio = 1;	738	return src != dst
		739	&& src->may_direct (dst)
		740	&& dst->may_direct (src)
		741	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		742	\|\| (src->protocols & dst->connectable_protocols ()));
		743	}
		744
		745	// only works for indirect and routed connections: find a router
		746	// from THISNODE to dst
		747	connection vpn::find_router_for (const connection dst)
		748	{
664	connection *router = 0;	749	connection *router = 0;
665		750
		751	// first try to find a router with a direct connection
		752	{
		753	u32 prio = 1;
		754
		755	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		756	{
		757	connection c = i;
		758
		759	if (c->conf->routerprio > prio
		760	&& c->conf != THISNODE
		761	&& c != dst
		762	&& can_direct (c->conf, dst->conf))
		763	{
		764	if (c->ictx && c->octx)
		765	{
		766	prio = c->conf->routerprio;
		767	router = c;
		768	}
		769	else
		770	c->establish_connection ();
		771	}
		772	}
		773	}
		774
		775	if (router)
		776	return router;
		777
		778	// second try find the router with the highest priority higher than ours
		779	{
		780	u32 prio = 1;
		781
		782	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		783	{
		784	connection c = i;
		785
		786	if (c->conf->routerprio > prio
		787	&& c->conf->routerprio > THISNODE->routerprio
		788	&& c != dst
		789	&& c->conf != THISNODE)
		790	{
		791	if (c->ictx && c->octx)
		792	{
		793	prio = c->conf->routerprio;
		794	router = c;
		795	}
		796	else
		797	c->establish_connection ();
		798	}
		799	}
		800	}
		801	return router;
		802	}
		803
		804	void vpn::connection_established (connection *c)
		805	{
666	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	806	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
667	{	807	{
668	connection c = i;	808	connection o = i;
669		809
670	if (c->conf->routerprio > prio	810	if (!o->is_direct
671	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	811	&& o->si.valid ()
672	&& c->ictx && c->octx	812	&& c->si != o->si
673	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	813	&& c == find_router_for (o))
674	{
675	prio = c->conf->routerprio;
676	router = c;
677	}	814	{
		815	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		816	o->conf->nodename, c->conf->nodename);
		817	o->rekey ();
		818	}
678	}	819	}
679
680	return router;
681	}	820	}
682		821
683	void vpn::send_connect_request (int id)	822	void vpn::send_connect_request (connection *c)
684	{	823	{
685	connection *c = find_router ();	824	connection *r = find_router_for (c);
686		825
687	if (c)	826	if (r)
		827	{
		828	slog (L_TRACE, _("%s: no way to connect, sending mediated connection request via %s."),
		829	c->conf->nodename, r->conf->nodename);
688	c->send_connect_request (id);	830	r->send_connect_request (c->conf->id);
		831	}
689	else	832	else
690	// no router found, aggressively connect to all routers	833	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect."),
691	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	834	c->conf->nodename);
692	if ((i)->conf->routerprio && (i)->conf != THISNODE)
693	(*i)->establish_connection ();
694	}	835	}
695		836
696	void	837	void
697	connection::dump_status ()	838	connection::dump_status ()
698	{	839	{
699	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	840	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
700	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	841	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
701	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	842	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
702	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	843	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
703	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	844	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
704	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
705	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
706	}	845	}
707		846
708	void	847	void
709	vpn::dump_status ()	848	vpn::dump_status ()
710	{	849	{
711	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	850	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
712		851
713	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	852	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
714	(*c)->dump_status ();	853	(*c)->dump_status ();
715		854
716	slog (L_NOTICE, _("END status dump"));	855	slog (L_NOTICE, _("END status dump"));
717	}	856	}
718		857
719	vpn::vpn (void)	858	vpn::vpn (void)
		859	{
720	: event (this, &vpn::event_cb)	860	event .set<vpn, &vpn::event_cb > (this);
721	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	861	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
722	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	862	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
723	#if ENABLE_TCP	863	#if ENABLE_TCP
724	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	864	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
725	#endif	865	#endif
726	#if ENABLE_ICMP	866	#if ENABLE_ICMP
727	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	867	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
728	#endif	868	#endif
729	#if ENABLE_DNS	869	#if ENABLE_DNS
730	, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)	870	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
731	#endif	871	#endif
732	, tap_ev_watcher (this, &vpn::tap_ev)	872	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
733	{
734	}	873	}
735		874
736	vpn::~vpn ()	875	vpn::~vpn ()
737	{	876	{
738	}	877	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.32 by pcg, Mon Mar 7 01:31:26 2005 UTC vs. Revision 1.50 by pcg, Sun Aug 10 02:49:21 2008 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.32 by pcg, Mon Mar 7 01:31:26 2005 UTC vs.
Revision 1.50 by pcg, Sun Aug 10 02:49:21 2008 UTC