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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs.
Revision 1.61 by root, Fri Sep 16 18:08:03 2011 UTC

…		…
1	/*	1	/*
2	vpn.C -- handle the protocol, encryption, handshaking etc.	2	vpn.C -- handle the protocol, encryption, handshaking etc.
		3	Copyright (C) 2003-2008,2010,2011 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	#include <list>	34	#include <list>
22		35
		36	#include <cstdio>
		37	#include <cstring>
23	#include <cstdlib>	38	#include <cstdlib>
24	#include <cstring>
25	#include <cstdio>
26		39
27	#include <sys/types.h>	40	#include <sys/types.h>
28	#include <sys/socket.h>	41	#include <sys/socket.h>
29	#include <sys/poll.h>
30	#include <sys/wait.h>	42	#include <sys/wait.h>
31	#include <errno.h>	43	#include <errno.h>
32	#include <time.h>	44	#include <time.h>
33	#include <unistd.h>	45	#include <unistd.h>
34	#include <fcntl.h>	46	#include <fcntl.h>
35	#include <sys/socket.h>	47	#include <sys/socket.h>
36	#include <netinet/in.h>	48
37	#include <arpa/inet.h>	49	#include "netcompat.h"
38	#include <net/if.h>
39	#ifdef HAVE_NETINET_IN_SYSTM_H
40	# include <netinet/in_systm.h>
41	#endif
42	#ifdef HAVE_NETINET_IP_H
43	# include <netinet/ip.h>
44	#endif
45	#ifdef HAVE_NETINET_TCP_H
46	# include <netinet/tcp.h>
47	#endif
48	#if ENABLE_ICMP
49	# include <netinet/ip_icmp.h>
50	#endif
51		50
52	#include "pidfile.h"	51	#include "pidfile.h"
53		52
54	#include "connection.h"	53	#include "connection.h"
55	#include "util.h"	54	#include "util.h"
56	#include "vpn.h"	55	#include "vpn.h"
57		56
58	#if !defined(SOL_IP) && defined(IPPROTO_IP)	57	vpn network; // THE vpn (bad design...)
59	# define SOL_IP IPPROTO_IP
60	#endif
61		58
62	/////////////////////////////////////////////////////////////////////////////	59	/////////////////////////////////////////////////////////////////////////////
63		60
64	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 ()
65	{	75	{
66	// the tunnel device mtu should be the physical mtu - overhead	76	// the tunnel device mtu should be the physical mtu - overhead
67	// the tricky part is rounding to the cipher key blocksize	77	// the tricky part is rounding to the cipher key blocksize
68	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	78	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
69	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	79	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
70	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	80	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
71	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	81	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
72		82
73	char *env;	83	char *env;
74	asprintf (&env, "CONFBASE=%s", confbase);	84	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
75	putenv (env);
76	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
77	putenv (env);
78	asprintf (&env, "NODEID=%d", THISNODE->id);
79	putenv (env);
80	asprintf (&env, "IFNAME=%s", tap->interface ());	85	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
81	putenv (env);	86	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		87	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
82	asprintf (&env, "MTU=%d", mtu);	88	asprintf (&env, "MTU=%d", mtu); putenv (env);
83	putenv (env);	89	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
84	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	90	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
85	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
86	THISNODE->id & 0xff);
87	putenv (env);
88		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,
89	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;
		122	}
		123
		124	int
		125	vpn::setup_socket (u8 prot, int family, int type, int proto)
		126	{
		127	int fd = socket (family, type, proto);
		128
		129	if (fd < 0)
		130	{
		131	slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno));
		132	return fd;
		133	}
		134
		135	fcntl (fd, F_SETFL, O_NONBLOCK);
		136	fcntl (fd, F_SETFD, FD_CLOEXEC);
		137
		138	#ifdef SO_MARK
		139	if (::conf.nfmark)
		140	if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark))
		141	slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno));
		142	#endif
		143
		144	return fd;
90	}	145	}
91		146
92	int	147	int
93	vpn::setup ()	148	vpn::setup ()
94	{	149	{
		150	int success = 0;
		151
		152	ipv4_tos = -1;
95	ipv4_fd = -1;	153	ipv4_fd = -1;
96		154
97	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	155	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
98	{	156	{
99	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	157	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
100		158
101	if (ipv4_fd < 0)	159	if (ipv4_fd < 0)
102	return -1;	160	return -1;
103
104	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
105		161
106	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	162	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
107	// this I really consider a linux bug. I am neither connected	163	// this I really consider a linux bug. I am neither connected
108	// nor do I fragment myself. Linux still sets DF and doesn't	164	// nor do I fragment myself. Linux still sets DF and doesn't
109	// fragment for me sometimes.	165	// fragment for me sometimes.
115		171
116	sockinfo si (THISNODE, PROT_IPv4);	172	sockinfo si (THISNODE, PROT_IPv4);
117		173
118	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	174	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
119	{	175	{
120	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	176	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
121	exit (1);	177	return -1;
122	}	178	}
123		179
124	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	180	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		181	++success;
125	}	182	}
		183	else
		184	THISNODE->protocols &= ~PROT_IPv4;
126		185
		186	udpv4_tos = -1;
127	udpv4_fd = -1;	187	udpv4_fd = -1;
128		188
129	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	189	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
130	{	190	{
131	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	191	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
132		192
133	if (udpv4_fd < 0)	193	if (udpv4_fd < 0)
134	return -1;	194	return -1;
135
136	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
137		195
138	// standard daemon practise...	196	// standard daemon practise...
139	{	197	{
140	int oval = 1;	198	int oval = 1;
141	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	199	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
153		211
154	sockinfo si (THISNODE, PROT_UDPv4);	212	sockinfo si (THISNODE, PROT_UDPv4);
155		213
156	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	214	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
157	{	215	{
158	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	216	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
159	exit (1);	217	return -1;
160	}	218	}
161		219
162	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	220	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		221	++success;
163	}	222	}
		223	else
		224	THISNODE->protocols &= ~PROT_UDPv4;
164		225
		226	icmpv4_tos = -1;
165	icmpv4_fd = -1;	227	icmpv4_fd = -1;
166		228
167	#if ENABLE_ICMP	229	#if ENABLE_ICMP
168	if (THISNODE->protocols & PROT_ICMPv4)	230	if (THISNODE->protocols & PROT_ICMPv4)
169	{	231	{
170	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	232	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
171		233
172	if (icmpv4_fd < 0)	234	if (icmpv4_fd < 0)
173	return -1;	235	return -1;
174
175	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
176		236
177	#ifdef ICMP_FILTER	237	#ifdef ICMP_FILTER
178	{	238	{
179	icmp_filter oval;	239	icmp_filter oval;
180	oval.data = 0xffffffff;	240	oval.data = 0xffffffff;
…		…
189	// this I really consider a linux bug. I am neither connected	249	// this I really consider a linux bug. I am neither connected
190	// nor do I fragment myself. Linux still sets DF and doesn't	250	// nor do I fragment myself. Linux still sets DF and doesn't
191	// fragment for me sometimes.	251	// fragment for me sometimes.
192	{	252	{
193	int oval = IP_PMTUDISC_DONT;	253	int oval = IP_PMTUDISC_DONT;
194	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	254	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
195	}	255	}
196	#endif	256	#endif
197		257
198	sockinfo si (THISNODE, PROT_ICMPv4);	258	sockinfo si (THISNODE, PROT_ICMPv4);
199		259
200	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	260	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
201	{	261	{
202	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	262	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
203	exit (1);	263	return -1;
204	}	264	}
205		265
206	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	266	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		267	++success;
207	}	268	}
208	#endif	269	#endif
209		270
210	tcpv4_fd = -1;	271	tcpv4_fd = -1;
211		272
212	#if ENABLE_TCP	273	#if ENABLE_TCP
213	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	274	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
214	{	275	{
215	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	276	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
216		277
217	if (tcpv4_fd < 0)	278	if (tcpv4_fd < 0)
218	return -1;	279	return -1;
219		280
220	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
221
222	// standard daemon practise...	281	// standard daemon practise...
223	{	282	{
224	int oval = 1;	283	int oval = 1;
225	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	284	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
226	}	285	}
227		286
228	sockinfo si (THISNODE, PROT_TCPv4);	287	sockinfo si (THISNODE, PROT_TCPv4);
229		288
230	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	289	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
231	{	290	{
232	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	291	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
233	exit (1);	292	return -1;
234	}	293	}
235		294
236	if (listen (tcpv4_fd, 5))	295	if (listen (tcpv4_fd, 5))
237	{	296	{
238	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	297	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
239	exit (1);	298	return -1;
		299	}
		300
		301	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		302	++success;
		303	}
		304	else
		305	THISNODE->protocols &= ~PROT_TCPv4;
		306	#endif
		307
		308	dnsv4_tos = -1;
		309	dnsv4_fd = -1;
		310
		311	#if ENABLE_DNS
		312	if (THISNODE->protocols & PROT_DNSv4)
		313	{
		314	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		315
		316	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		317
		318	if (dnsv4_fd < 0)
		319	return -1;
		320
		321	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		322	// this I really consider a linux bug. I am neither connected
		323	// nor do I fragment myself. Linux still sets DF and doesn't
		324	// fragment for me sometimes.
		325	{
		326	int oval = IP_PMTUDISC_DONT;
		327	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
240	}	328	}
241
242	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
243	}
244	#endif	329	# endif
		330
		331	// standard daemon practise...
		332	{
		333	int oval = 1;
		334	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		335	}
		336
		337	sockinfo si (THISNODE->dns_hostname,
		338	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		339	PROT_DNSv4);
		340
		341	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		342	{
		343	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		344	return -1;
		345	}
		346
		347	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		348	++success;
		349	}
		350	#endif
		351
		352	/////////////////////////////////////////////////////////////////////////////
		353
		354	if (!success)
		355	{
		356	slog (L_ERR, _("no protocols enabled."));
		357	return -1;
		358	}
		359
		360	reconnect_all ();
		361
		362	/////////////////////////////////////////////////////////////////////////////
245		363
246	tap = new tap_device ();	364	tap = new tap_device ();
247	if (!tap) //D this, of course, never catches	365	if (!tap) //D this, of course, never catches
248	{	366	{
249	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	367	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
250	exit (1);	368	return -1;
251	}	369	}
252		370
253	run_script (run_script_cb (this, &vpn::script_if_up), true);	371	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
254		372
		373	run_script_cb cb;
		374	cb.set<vpn, &vpn::script_if_init> (this);
		375
		376	if (tap->if_up () &&
		377	!run_script (cb, true))
		378	{
		379	slog (L_ERR, _("interface initialization command '%s' failed."),
		380	tap->if_up ());
		381	return -1;
		382	}
		383
		384	cb.set<vpn, &vpn::script_if_up> (this);
		385	if (!run_script (cb, true))
		386	{
		387	slog (L_ERR, _("if-up command execution failed."));
		388	return -1;
		389	}
		390
255	tap_ev_watcher.start (tap->fd, POLLIN);	391	tap_ev_watcher.start (tap->fd, EV_READ);
256
257	reconnect_all ();
258		392
259	return 0;	393	return 0;
260	}
261
262	// send a vpn packet out to other hosts
263	bool
264	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
265	{
266	switch (si.prot)
267	{
268	case PROT_IPv4:
269	return send_ipv4_packet (pkt, si, tos);
270
271	case PROT_UDPv4:
272	return send_udpv4_packet (pkt, si, tos);
273
274	#if ENABLE_TCP
275	case PROT_TCPv4:
276	return send_tcpv4_packet (pkt, si, tos);
277	#endif
278
279	#if ENABLE_ICMP
280	case PROT_ICMPv4:
281	return send_icmpv4_packet (pkt, si, tos);
282	#endif
283
284	default:
285	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
286	return false;
287	}
288	}	394	}
289		395
290	bool	396	bool
291	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	397	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
292	{	398	{
293	#if defined(SOL_IP) && defined(IP_TOS)	399	set_tos (ipv4_fd, ipv4_tos, tos);
294	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
295	#endif
296	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	400	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
297		401
298	return true;	402	return true;
299	}	403	}
300		404
…		…
320		424
321	return ~sum;	425	return ~sum;
322	}	426	}
323		427
324	#if ENABLE_ICMP	428	#if ENABLE_ICMP
325	struct icmp_header {
326	u8 type;
327	u8 code;
328	u16 checksum;
329	union {
330	struct {
331	u16 id;
332	u16 sequence;
333	} echo;
334	u32 gateway;
335	struct {
336	u16 unused;
337	u16 mtu;
338	} frag;
339	} un;
340	};
341
342	bool	429	bool
343	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	430	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
344	{	431	{
345	#if defined(SOL_IP) && defined(IP_TOS)
346	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
347	#endif
348
349	pkt->unshift_hdr (4);	432	pkt->unshift_hdr (4);
350		433
351	icmp_header hdr = (icmp_header )&((*pkt)[0]);	434	icmp_header hdr = (icmp_header )&((*pkt)[0]);
352	hdr->type = ::conf.icmp_type;	435	hdr->type = ::conf.icmp_type;
353	hdr->code = 255;	436	hdr->code = 255;
354	hdr->checksum = 0;	437	hdr->checksum = 0;
355	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	438	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
356		439
		440	set_tos (icmpv4_fd, icmpv4_tos, tos);
357	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	441	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
358		442
359	return true;	443	return true;
360	}	444	}
361	#endif	445	#endif
362		446
363	bool	447	bool
364	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	448	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
365	{	449	{
366	#if defined(SOL_IP) && defined(IP_TOS)	450	set_tos (udpv4_fd, udpv4_tos, tos);
367	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
368	#endif
369	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	451	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
370		452
371	return true;	453	return true;
		454	}
		455
		456	void
		457	vpn::inject_data_packet (tap_packet *pkt, int dst)
		458	{
		459	if (dst)
		460	{
		461	// unicast
		462	if (dst != THISNODE->id)
		463	conns[dst - 1]->inject_data_packet (pkt);
		464	}
		465	else
		466	{
		467	// broadcast, this is ugly, but due to the security policy
		468	// we have to connect to all hosts...
		469	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		470	if ((*c)->conf != THISNODE)
		471	(*c)->inject_data_packet (pkt);
		472	}
372	}	473	}
373		474
374	void	475	void
375	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	476	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
376	{	477	{
377	unsigned int src = pkt->src ();	478	unsigned int src = pkt->src ();
378	unsigned int dst = pkt->dst ();	479	unsigned int dst = pkt->dst ();
379		480
380	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	481	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
381	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	482	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
382		483
383	if (src == 0 \|\| src > conns.size ()	484	if (src == 0 \|\| src > conns.size ()
384	\|\| dst > conns.size ()	485	\|\| dst > conns.size ()
385	\|\| pkt->typ () >= vpn_packet::PT_MAX)	486	\|\| pkt->typ () >= vpn_packet::PT_MAX)
386	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	487	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
387	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	488	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
388	else if (dst > conns.size ())
389	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
390	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
391	else	489	else
392	{	490	{
393	connection *c = conns[src - 1];	491	connection *c = conns[src - 1];
394		492
395	if (dst == 0)	493	if (dst == 0)
396	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	494	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
397	c->conf->nodename, (const char *)rsi);	495	c->conf->nodename, (const char *)rsi);
398	else if (dst != 0 && dst != THISNODE->id)	496	else if (dst != THISNODE->id)
399	{	497	{
400	if (THISNODE->routerprio)	498	if (THISNODE->routerprio)
401	// the tos setting gets lost here. who cares.	499	// the tos setting gets lost here. who cares.
402	conns[dst - 1]->inject_vpn_packet (pkt);	500	conns[dst - 1]->inject_vpn_packet (pkt);
403	else	501	else
404	slog (L_WARN,	502	slog (L_WARN,
405	_("%s(%s): forwarding request (=> %s), but we are no router"),	503	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
406	c->conf->nodename, (const char *)rsi,	504	c->conf->nodename, (const char *)rsi,
407	conns[dst - 1]->conf->nodename);	505	conns[dst - 1]->conf->nodename);
408	}	506	}
409	else	507	else
410	c->recv_vpn_packet (pkt, rsi);	508	c->recv_vpn_packet (pkt, rsi);
411	}	509	}
412	}	510	}
413		511
414	void	512	bool
		513	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		514	{
		515	switch (si.prot)
		516	{
		517	case PROT_IPv4:
		518	return send_ipv4_packet (pkt, si, tos);
		519
		520	case PROT_UDPv4:
		521	return send_udpv4_packet (pkt, si, tos);
		522
		523	#if ENABLE_TCP
		524	case PROT_TCPv4:
		525	return send_tcpv4_packet (pkt, si, tos);
		526	#endif
		527	#if ENABLE_ICMP
		528	case PROT_ICMPv4:
		529	return send_icmpv4_packet (pkt, si, tos);
		530	#endif
		531	#if ENABLE_DNS
		532	case PROT_DNSv4:
		533	return send_dnsv4_packet (pkt, si, tos);
		534	#endif
		535	default:
		536	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		537	}
		538
		539	return false;
		540	}
		541
		542	inline void
415	vpn::ipv4_ev (io_watcher &w, short revents)	543	vpn::ipv4_ev (ev::io &w, int revents)
416	{	544	{
417	if (revents & (POLLIN \| POLLERR))	545	if (revents & EV_READ)
418	{	546	{
419	vpn_packet *pkt = new vpn_packet;	547	vpn_packet *pkt = new vpn_packet;
420	struct sockaddr_in sa;	548	struct sockaddr_in sa;
421	socklen_t sa_len = sizeof (sa);	549	socklen_t sa_len = sizeof (sa);
422	int len;	550	int len;
…		…
427		555
428	if (len > 0)	556	if (len > 0)
429	{	557	{
430	pkt->len = len;	558	pkt->len = len;
431		559
432	// raw sockets deliver the ipv4, but don't expect it on sends	560	// raw sockets deliver the ipv4 header, but don't expect it on sends
433	// this is slow, but...	561	pkt->skip_hdr (pkt->ipv4_hdr_len ());
434	pkt->skip_hdr (IP_OVERHEAD);
435		562
436	recv_vpn_packet (pkt, si);	563	recv_vpn_packet (pkt, si);
437	}	564	}
438	else	565	else
439	{	566	{
440	// probably ECONNRESET or somesuch	567	// probably ECONNRESET or somesuch
441	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	568	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
442	}	569	}
443		570
444	delete pkt;	571	delete pkt;
445	}	572	}
446	else if (revents & POLLHUP)
447	{
448	// this cannot ;) happen on udp sockets
449	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
450	exit (1);
451	}
452	else	573	else
453	{	574	{
454	slog (L_ERR,	575	slog (L_ERR,
455	_("FATAL: unknown revents %08x in socket, terminating\n"),	576	_("FATAL: unknown revents %08x in socket, exiting.\n"),
456	revents);	577	revents);
457	exit (1);	578	exit (EXIT_FAILURE);
458	}	579	}
459	}	580	}
460		581
461	#if ENABLE_ICMP	582	#if ENABLE_ICMP
462	void	583	inline void
463	vpn::icmpv4_ev (io_watcher &w, short revents)	584	vpn::icmpv4_ev (ev::io &w, int revents)
464	{	585	{
465	if (revents & (POLLIN \| POLLERR))	586	if (revents & EV_READ)
466	{	587	{
467	vpn_packet *pkt = new vpn_packet;	588	vpn_packet *pkt = new vpn_packet;
468	struct sockaddr_in sa;	589	struct sockaddr_in sa;
469	socklen_t sa_len = sizeof (sa);	590	socklen_t sa_len = sizeof (sa);
470	int len;	591	int len;
…		…
482	if (hdr->type == ::conf.icmp_type	603	if (hdr->type == ::conf.icmp_type
483	&& hdr->code == 255)	604	&& hdr->code == 255)
484	{	605	{
485	// raw sockets deliver the ipv4, but don't expect it on sends	606	// raw sockets deliver the ipv4, but don't expect it on sends
486	// this is slow, but...	607	// this is slow, but...
487	pkt->skip_hdr (ICMP_OVERHEAD);	608	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
488		609
489	recv_vpn_packet (pkt, si);	610	recv_vpn_packet (pkt, si);
490	}	611	}
491	}	612	}
492	else	613	else
493	{	614	{
494	// probably ECONNRESET or somesuch	615	// probably ECONNRESET or somesuch
495	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	616	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
496	}	617	}
497		618
498	delete pkt;	619	delete pkt;
499	}	620	}
500	else if (revents & POLLHUP)
501	{
502	// this cannot ;) happen on udp sockets
503	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
504	exit (1);
505	}
506	else	621	else
507	{	622	{
508	slog (L_ERR,	623	slog (L_ERR,
509	_("FATAL: unknown revents %08x in socket, terminating\n"),	624	_("FATAL: unknown revents %08x in socket, exiting.\n"),
510	revents);	625	revents);
511	exit (1);	626	exit (EXIT_FAILURE);
512	}	627	}
513	}	628	}
514	#endif	629	#endif
515		630
516	void	631	inline void
517	vpn::udpv4_ev (io_watcher &w, short revents)	632	vpn::udpv4_ev (ev::io &w, int revents)
518	{	633	{
519	if (revents & (POLLIN \| POLLERR))	634	if (revents & EV_READ)
520	{	635	{
521	vpn_packet *pkt = new vpn_packet;	636	vpn_packet *pkt = new vpn_packet;
522	struct sockaddr_in sa;	637	struct sockaddr_in sa;
523	socklen_t sa_len = sizeof (sa);	638	socklen_t sa_len = sizeof (sa);
524	int len;	639	int len;
…		…
534	recv_vpn_packet (pkt, si);	649	recv_vpn_packet (pkt, si);
535	}	650	}
536	else	651	else
537	{	652	{
538	// probably ECONNRESET or somesuch	653	// probably ECONNRESET or somesuch
539	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	654	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
540	}	655	}
541		656
542	delete pkt;	657	delete pkt;
543	}	658	}
544	else if (revents & POLLHUP)
545	{
546	// this cannot ;) happen on udp sockets
547	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
548	exit (1);
549	}
550	else	659	else
551	{	660	{
552	slog (L_ERR,	661	slog (L_ERR,
553	_("FATAL: unknown revents %08x in socket, terminating\n"),	662	_("FATAL: unknown revents %08x in socket, exiting.\n"),
554	revents);	663	revents);
555	exit (1);	664	exit (EXIT_FAILURE);
556	}	665	}
557	}	666	}
558		667
559	void	668	inline void
560	vpn::tap_ev (io_watcher &w, short revents)	669	vpn::tap_ev (ev::io &w, int revents)
561	{	670	{
562	if (revents & POLLIN)	671	if (revents & EV_READ)
563	{	672	{
564	/* process data */	673	/* process data */
565	tap_packet *pkt;	674	tap_packet *pkt;
566		675
567	pkt = tap->recv ();	676	pkt = tap->recv ();
568		677
		678	if (!pkt)
		679	return;
		680
		681	if (pkt->len > 14)
		682	{
569	int dst = mac2id (pkt->dst);	683	int dst = mac2id (pkt->dst);
570	int src = mac2id (pkt->src);	684	int src = mac2id (pkt->src);
571		685
572	if (src != THISNODE->id)	686	if (src != THISNODE->id)
573	{
574	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));
575	exit (1);
576	}
577
578	if (dst == THISNODE->id)
579	{
580	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
581	exit (1);
582	}
583
584	if (dst > conns.size ())
585	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
586	else
587	{
588	if (dst)
589	{	687	{
590	// unicast	688	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
591	if (dst != THISNODE->id)	689	exit (EXIT_FAILURE);
592	conns[dst - 1]->inject_data_packet (pkt);
593	}	690	}
		691
		692	if (dst == THISNODE->id)
		693	{
		694	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		695	exit (EXIT_FAILURE);
		696	}
		697
		698	if (dst > conns.size ())
		699	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
594	else	700	else
595	{
596	// broadcast, this is ugly, but due to the security policy
597	// we have to connect to all hosts...
598	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
599	if ((*c)->conf != THISNODE)
600	(*c)->inject_data_packet (pkt);	701	inject_data_packet (pkt, dst);
601	}
602	}	702	}
603		703
604	delete pkt;	704	delete pkt;
605	}	705	}
606	else if (revents & (POLLHUP \| POLLERR))
607	{
608	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
609	exit (1);
610	}
611	else	706	else
612	abort ();	707	abort ();
613	}	708	}
614		709
615	void	710	inline void
616	vpn::event_cb (time_watcher &w)	711	vpn::event_cb (ev::timer &w, int)
617	{	712	{
618	if (events)	713	if (events)
619	{	714	{
620	if (events & EVENT_SHUTDOWN)	715	if (events & EVENT_SHUTDOWN)
621	{	716	{
622	slog (L_INFO, _("preparing shutdown..."));	717	slog (L_INFO, _("preparing shutdown..."));
623		718
624	shutdown_all ();	719	shutdown_all ();
625
626	remove_pid (pidfilename);	720	remove_pid (conf.pidfilename);
627
628	slog (L_INFO, _("terminating"));	721	slog (L_INFO, _("exiting."));
629		722	exit (EXIT_SUCCESS);
630	exit (0);
631	}	723	}
632		724
633	if (events & EVENT_RECONNECT)	725	if (events & EVENT_RECONNECT)
634	{	726	{
635	slog (L_INFO, _("forced reconnect"));	727	slog (L_INFO, _("forced reconnect."));
636		728
637	reconnect_all ();	729	reconnect_all ();
638	}	730	}
639		731
640	events = 0;	732	events = 0;
641	}	733	}
642
643	w.at = TSTAMP_CANCEL;
644	}	734	}
645		735
646	void	736	void
647	vpn::shutdown_all ()	737	vpn::shutdown_all ()
648	{	738	{
…		…
658		748
659	conns.clear ();	749	conns.clear ();
660		750
661	connection_init ();	751	connection_init ();
662		752
663	for (configuration::node_vector::iterator i = conf.nodes.begin ();	753	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
664	i != conf.nodes.end (); ++i)	754	conns.push_back (new connection (this, *i));
665	{
666	connection *conn = new connection (this);
667		755
668	conn->conf = *i;	756	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
669	conns.push_back (conn);
670
671	conn->establish_connection ();	757	(*c)->establish_connection ();
672	}
673	}	758	}
674		759
675	connection *vpn::find_router ()	760	bool
		761	vpn::can_direct (conf_node src, conf_node dst) const
676	{	762	{
677	u32 prio = 1;	763	return src != dst
		764	&& src->may_direct (dst)
		765	&& dst->may_direct (src)
		766	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		767	\|\| (src->protocols & dst->connectable_protocols ()));
		768	}
		769
		770	// only works for indirect and routed connections: find a router
		771	// from THISNODE to dst
		772	connection *
		773	vpn::find_router_for (const connection *dst)
		774	{
678	connection *router = 0;	775	connection *router = 0;
679		776
		777	// first try to find a router with a direct connection, route there
		778	// regardless of any other considerations.
		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 != THISNODE
		788	&& can_direct (c->conf, dst->conf)
		789	&& c->ictx && c->octx)
		790	{
		791	prio = c->conf->routerprio;
		792	router = c;
		793	}
		794	}
		795	}
		796
		797	if (router)
		798	return router;
		799
		800	// second try find the router with the highest priority, higher than ours
		801	{
		802	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		803
		804	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		805	{
		806	connection c = i;
		807
		808	if (c->conf->routerprio > prio
		809	&& c != dst
		810	&& c->conf != THISNODE
		811	&& c->ictx && c->octx)
		812	{
		813	prio = c->conf->routerprio;
		814	router = c;
		815	}
		816	}
		817	}
		818
		819	return router;
		820	}
		821
		822	void
		823	vpn::connection_established (connection *c)
		824	{
680	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	825	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
681	{	826	{
682	connection c = i;	827	connection o = i;
683		828
684	if (c->conf->routerprio > prio	829	if (!o->is_direct
685	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	830	&& o->si.valid ()
686	&& c->ictx && c->octx	831	&& c->si != o->si
687	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	832	&& c == find_router_for (o))
688	{
689	prio = c->conf->routerprio;
690	router = c;
691	}	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	}
692	}	838	}
693
694	return router;
695	}	839	}
696		840
		841	void
697	void vpn::send_connect_request (int id)	842	vpn::send_connect_request (connection *c)
698	{	843	{
699	connection *c = find_router ();	844	connection *r = find_router_for (c);
700		845
701	if (c)	846	if (r)
		847	{
		848	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		849	c->conf->nodename, r->conf->nodename);
702	c->send_connect_request (id);	850	r->send_connect_request (c->conf->id);
		851	}
703	else	852	else
704	// no router found, aggressively connect to all routers	853	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
705	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	854	c->conf->nodename);
706	if ((i)->conf->routerprio && (i)->conf != THISNODE)
707	(*i)->establish_connection ();
708	}	855	}
709		856
710	void	857	void
711	connection::dump_status ()	858	connection::dump_status ()
712	{	859	{
713	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	860	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
714	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	861	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
715	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	862	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
716	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	863	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
717	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	864	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
718	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
719	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
720	}	865	}
721		866
722	void	867	void
723	vpn::dump_status ()	868	vpn::dump_status ()
724	{	869	{
725	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	870	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
726		871
727	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	872	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
728	(*c)->dump_status ();	873	(*c)->dump_status ();
729		874
730	slog (L_NOTICE, _("END status dump"));	875	slog (L_NOTICE, _("END status dump"));
731	}	876	}
732		877
733	vpn::vpn (void)	878	vpn::vpn (void)
		879	{
734	: event (this, &vpn::event_cb)	880	event .set<vpn, &vpn::event_cb > (this);
735	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	881	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
736	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	882	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
737	#if ENABLE_TCP	883	#if ENABLE_TCP
738	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	884	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
739	#endif	885	#endif
740	#if ENABLE_ICMP	886	#if ENABLE_ICMP
741	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	887	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
742	#endif	888	#endif
743	, tap_ev_watcher (this, &vpn::tap_ev)	889	#if ENABLE_DNS
744	{	890	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		891	#endif
		892	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
745	}	893	}
746		894
747	vpn::~vpn ()	895	vpn::~vpn ()
748	{	896	{
749	}	897	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs. Revision 1.61 by root, Fri Sep 16 18:08:03 2011 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs.
Revision 1.61 by root, Fri Sep 16 18:08:03 2011 UTC