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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.8 by pcg, Mon Apr 7 01:28:56 2003 UTC vs.
Revision 1.64 by root, Tue Dec 4 10:29:43 2012 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 <netinet/in.h>	43	#include <sys/stat.h>
32	#include <arpa/inet.h>
33	#include <errno.h>	44	#include <errno.h>
34	#include <time.h>	45	#include <time.h>
35	#include <unistd.h>	46	#include <unistd.h>
		47	#include <fcntl.h>
		48	#include <sys/socket.h>
		49
		50	#include "netcompat.h"
36		51
37	#include "pidfile.h"	52	#include "pidfile.h"
38		53
39	#include "connection.h"	54	#include "connection.h"
40	#include "util.h"	55	#include "util.h"
41	#include "vpn.h"	56	#include "vpn.h"
42		57
		58	using namespace std;
		59
		60	vpn network; // THE vpn (bad design...)
		61
43	/////////////////////////////////////////////////////////////////////////////	62	/////////////////////////////////////////////////////////////////////////////
44		63
45	const char *vpn::script_if_up ()	64	static void inline
		65	set_tos (int fd, int &tos_prev, int tos)
		66	{
		67	#if defined(SOL_IP) && defined(IP_TOS)
		68	if (tos_prev == tos)
		69	return;
		70
		71	tos_prev = tos;
		72	setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		73	#endif
		74	}
		75
		76	void
		77	vpn::script_init_env ()
46	{	78	{
47	// the tunnel device mtu should be the physical mtu - overhead	79	// the tunnel device mtu should be the physical mtu - overhead
48	// the tricky part is rounding to the cipher key blocksize	80	// the tricky part is rounding to the cipher key blocksize
49	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	81	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
50	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	82	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
51	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	83	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
52	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	84	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
53		85
54	char *env;	86	char *env;
55	asprintf (&env, "CONFBASE=%s", confbase);	87	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
56	putenv (env);
57	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
58	putenv (env);
59	asprintf (&env, "NODEID=%d", THISNODE->id);
60	putenv (env);
61	asprintf (&env, "IFNAME=%s", tap->interface ());	88	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
62	putenv (env);	89	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		90	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
63	asprintf (&env, "MTU=%d", mtu);	91	asprintf (&env, "MTU=%d", mtu); putenv (env);
64	putenv (env);	92	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
65	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	93	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
66	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
67	THISNODE->id & 0xff);
68	putenv (env);
69		94
		95	conns [THISNODE->id - 1]->script_init_env ("");
		96
		97	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		98	{
		99	char ext[16];
		100	snprintf (ext, 16, "_%d", (*c)->conf->id);
		101	(*c)->script_init_env (ext);
		102	}
		103	}
		104
		105	inline const char *
		106	vpn::script_if_init ()
		107	{
		108	script_init_env ();
		109
		110	return tap->if_up ();
		111	}
		112
		113	inline const char *
		114	vpn::script_if_up ()
		115	{
		116	script_init_env ();
		117
		118	char *filename;
		119	asprintf (&filename,
		120	"%s/%s",
		121	confbase,
70	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	122	::conf.script_if_up ? ::conf.script_if_up : "if-up");
		123
		124	return filename;
		125	}
		126
		127	int
		128	vpn::setup_socket (u8 prot, int family, int type, int proto)
		129	{
		130	int fd = socket (family, type, proto);
		131
		132	if (fd < 0)
		133	{
		134	slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno));
		135	return fd;
		136	}
		137
		138	fcntl (fd, F_SETFL, O_NONBLOCK);
		139	fcntl (fd, F_SETFD, FD_CLOEXEC);
		140
		141	#ifdef SO_MARK
		142	if (::conf.nfmark)
		143	if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark))
		144	slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno));
		145	#endif
		146
		147	return fd;
71	}	148	}
72		149
73	int	150	int
74	vpn::setup ()	151	vpn::setup ()
75	{	152	{
		153	int success = 0;
		154
		155	ipv4_tos = -1;
76	ipv4_fd = -1;	156	ipv4_fd = -1;
77		157
78	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	158	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
79	{	159	{
80	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	160	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
81		161
82	if (ipv4_fd < 0)	162	if (ipv4_fd < 0)
83	return -1;	163	return -1;
84		164
85	sockinfo si (THISNODE, PROT_IPv4);	165	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
86
87	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
88	{
89	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
90	exit (1);
91	}
92
93	#ifdef IP_MTU_DISCOVER
94	// this I really consider a linux bug. I am neither connected	166	// this I really consider a linux bug. I am neither connected
95	// nor do I fragment myself. Linux still sets DF and doesn't	167	// nor do I fragment myself. Linux still sets DF and doesn't
96	// fragment for me sometimes.	168	// fragment for me sometimes.
97	{	169	{
98	int oval = IP_PMTUDISC_DONT;	170	int oval = IP_PMTUDISC_DONT;
99	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	171	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
100	}	172	}
101	#endif	173	#endif
102		174
		175	sockinfo si (THISNODE, PROT_IPv4);
		176
		177	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
		178	{
		179	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
		180	return -1;
		181	}
		182
103	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	183	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		184	++success;
104	}	185	}
		186	else
		187	THISNODE->protocols &= ~PROT_IPv4;
105		188
		189	udpv4_tos = -1;
106	udpv4_fd = -1;	190	udpv4_fd = -1;
107		191
108	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	192	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
109	{	193	{
110	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	194	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
111		195
112	if (udpv4_fd < 0)	196	if (udpv4_fd < 0)
113	return -1;	197	return -1;
114		198
115	// standard daemon practise...	199	// standard daemon practise...
116	{	200	{
117	int oval = 1;	201	int oval = 1;
118	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	202	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
119	}	203	}
120		204
121	sockinfo si (THISNODE, PROT_UDPv4);	205	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
122
123	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
124	{
125	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
126	exit (1);
127	}
128
129	#ifdef IP_MTU_DISCOVER
130	// this I really consider a linux bug. I am neither connected	206	// this I really consider a linux bug. I am neither connected
131	// nor do I fragment myself. Linux still sets DF and doesn't	207	// nor do I fragment myself. Linux still sets DF and doesn't
132	// fragment for me sometimes.	208	// fragment for me sometimes.
133	{	209	{
134	int oval = IP_PMTUDISC_DONT;	210	int oval = IP_PMTUDISC_DONT;
135	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	211	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
136	}	212	}
137	#endif	213	#endif
138		214
		215	sockinfo si (THISNODE, PROT_UDPv4);
		216
		217	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
		218	{
		219	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		220	return -1;
		221	}
		222
139	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	223	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		224	++success;
		225	}
		226	else
		227	THISNODE->protocols &= ~PROT_UDPv4;
		228
		229	icmpv4_tos = -1;
		230	icmpv4_fd = -1;
		231
		232	#if ENABLE_ICMP
		233	if (THISNODE->protocols & PROT_ICMPv4)
		234	{
		235	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
		236
		237	if (icmpv4_fd < 0)
		238	return -1;
		239
		240	#ifdef ICMP_FILTER
		241	{
		242	icmp_filter oval;
		243	oval.data = 0xffffffff;
		244	if (::conf.icmp_type < 32)
		245	oval.data &= ~(1 << ::conf.icmp_type);
		246
		247	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
140	}	248	}
		249	#endif
		250
		251	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		252	// this I really consider a linux bug. I am neither connected
		253	// nor do I fragment myself. Linux still sets DF and doesn't
		254	// fragment for me sometimes.
		255	{
		256	int oval = IP_PMTUDISC_DONT;
		257	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		258	}
		259	#endif
		260
		261	sockinfo si (THISNODE, PROT_ICMPv4);
		262
		263	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
		264	{
		265	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		266	return -1;
		267	}
		268
		269	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		270	++success;
		271	}
		272	#endif
141		273
142	tcpv4_fd = -1;	274	tcpv4_fd = -1;
143		275
144	#if ENABLE_TCP	276	#if ENABLE_TCP
145	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	277	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
146	{	278	{
147	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	279	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
148		280
149	if (tcpv4_fd < 0)	281	if (tcpv4_fd < 0)
150	return -1;	282	return -1;
151		283
152	// standard daemon practise...	284	// standard daemon practise...
157		289
158	sockinfo si (THISNODE, PROT_TCPv4);	290	sockinfo si (THISNODE, PROT_TCPv4);
159		291
160	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	292	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
161	{	293	{
162	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	294	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
163	exit (1);	295	return -1;
164	}	296	}
165		297
166	if (listen (tcpv4_fd, 5))	298	if (listen (tcpv4_fd, 5))
167	{	299	{
168	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	300	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
169	exit (1);	301	return -1;
		302	}
		303
		304	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		305	++success;
		306	}
		307	else
		308	THISNODE->protocols &= ~PROT_TCPv4;
		309	#endif
		310
		311	dnsv4_tos = -1;
		312	dnsv4_fd = -1;
		313
		314	#if ENABLE_DNS
		315	if (THISNODE->protocols & PROT_DNSv4)
		316	{
		317	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		318
		319	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		320
		321	if (dnsv4_fd < 0)
		322	return -1;
		323
		324	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		325	// this I really consider a linux bug. I am neither connected
		326	// nor do I fragment myself. Linux still sets DF and doesn't
		327	// fragment for me sometimes.
		328	{
		329	int oval = IP_PMTUDISC_DONT;
		330	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
170	}	331	}
171
172	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
173	}
174	#endif	332	# endif
		333
		334	// standard daemon practise...
		335	{
		336	int oval = 1;
		337	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		338	}
		339
		340	sockinfo si (THISNODE->dns_hostname,
		341	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		342	PROT_DNSv4);
		343
		344	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		345	{
		346	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		347	return -1;
		348	}
		349
		350	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		351	++success;
		352	}
		353	#endif
		354
		355	/////////////////////////////////////////////////////////////////////////////
		356
		357	if (!success)
		358	{
		359	slog (L_ERR, _("no protocols enabled."));
		360	return -1;
		361	}
		362
		363	reconnect_all ();
		364
		365	/////////////////////////////////////////////////////////////////////////////
175		366
176	tap = new tap_device ();	367	tap = new tap_device ();
177	if (!tap) //D this, of course, never catches	368	if (!tap) //D this, of course, never catches
178	{	369	{
179	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	370	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
180	exit (1);	371	return -1;
181	}	372	}
182		373
183	run_script (run_script_cb (this, &vpn::script_if_up), true);	374	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
184		375
		376	run_script_cb cb;
		377	cb.set<vpn, &vpn::script_if_init> (this);
		378
		379	if (tap->if_up () &&
		380	!run_script (cb, true))
		381	{
		382	slog (L_ERR, _("interface initialization command '%s' failed."),
		383	tap->if_up ());
		384	return -1;
		385	}
		386
		387	cb.set<vpn, &vpn::script_if_up> (this);
		388	if (!run_script (cb, true))
		389	{
		390	slog (L_ERR, _("if-up command execution failed."));
		391	return -1;
		392	}
		393
185	tap_ev_watcher.start (tap->fd, POLLIN);	394	tap_ev_watcher.start (tap->fd, EV_READ);
186
187	reconnect_all ();
188		395
189	return 0;	396	return 0;
190	}	397	}
191		398
192	// send a vpn packet out to other hosts
193	bool	399	bool
194	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	400	vpn::drop_privileges ()
195	{	401	{
196	switch (si.prot)	402	if (::conf.change_root)
		403	{
		404	if (!strcmp (::conf.change_root, "/"))
		405	{
		406	char dir [L_tmpnam];
		407	if (!tmpnam (dir))
		408	{
		409	slog (L_CRIT, _("unable to create anonymous root path."));
		410	return false;
		411	}
		412
		413	if (mkdir (dir, 0700))
		414	{
		415	slog (L_CRIT, _("unable to crate anonymous root directory."));
		416	return false;
		417	}
		418
		419	if (chdir (dir))
		420	{
		421	slog (L_CRIT, _("unable to change to anonymous root directory."));
		422	return false;
		423	}
		424
		425	if (rmdir (dir))
		426	slog (L_ERR, _("unable to remove anonymous root directory, continuing."));
		427	}
		428	else
		429	{
		430	if (chdir (::conf.change_root))
		431	{
		432	slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root);
		433	return false;
		434	}
		435	}
		436
		437	if (chroot ("."))
		438	{
		439	slog (L_CRIT, _("unable to set new root directory."));
		440	return false;
		441	}
		442
		443	if (chdir ("/"))
		444	{
		445	slog (L_CRIT, _("unable to set cwd to new root directory."));
		446	return false;
		447	}
		448	}
		449
		450	if (::conf.change_gid)
		451	if (setgid (::conf.change_gid))
197	{	452	{
198	case PROT_IPv4:	453	slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid);
199	return send_ipv4_packet (pkt, si, tos);
200
201	case PROT_UDPv4:
202	return send_udpv4_packet (pkt, si, tos);
203
204	#if ENABLE_TCP
205	case PROT_TCPv4:
206	return send_tcpv4_packet (pkt, si, tos);
207	#endif
208
209	default:
210	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
211	return false;	454	return false;
212	}	455	}
		456
		457	if (::conf.change_uid)
		458	if (setuid (::conf.change_uid))
		459	{
		460	slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid);
		461	return false;
		462	}
		463
		464	return true;
213	}	465	}
214		466
215	bool	467	bool
216	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	468	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
217	{	469	{
218	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	470	set_tos (ipv4_fd, ipv4_tos, tos);
219	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	471	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
220		472
221	return true;	473	return true;
222	}	474	}
		475
		476	static u16
		477	ipv4_checksum (u16 *data, unsigned int len)
		478	{
		479	// use 32 bit accumulator and fold back carry bits at the end
		480	u32 sum = 0;
		481
		482	while (len > 1)
		483	{
		484	sum += *data++;
		485	len -= 2;
		486	}
		487
		488	// odd byte left?
		489	if (len)
		490	sum += (u8 )data;
		491
		492	// add back carry bits
		493	sum = (sum >> 16) + (sum & 0xffff); // lo += hi
		494	sum += (sum >> 16); // carry
		495
		496	return ~sum;
		497	}
		498
		499	#if ENABLE_ICMP
		500	bool
		501	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		502	{
		503	pkt->unshift_hdr (4);
		504
		505	icmp_header hdr = (icmp_header )&((*pkt)[0]);
		506	hdr->type = ::conf.icmp_type;
		507	hdr->code = 255;
		508	hdr->checksum = 0;
		509	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
		510
		511	set_tos (icmpv4_fd, icmpv4_tos, tos);
		512	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		513
		514	return true;
		515	}
		516	#endif
223		517
224	bool	518	bool
225	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	519	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
226	{	520	{
227	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	521	set_tos (udpv4_fd, udpv4_tos, tos);
228	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	522	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
229		523
230	return true;	524	return true;
		525	}
		526
		527	void
		528	vpn::inject_data_packet (tap_packet *pkt, int dst)
		529	{
		530	if (dst)
		531	{
		532	// unicast
		533	if (dst != THISNODE->id)
		534	conns[dst - 1]->inject_data_packet (pkt);
		535	}
		536	else
		537	{
		538	// broadcast, this is ugly, but due to the security policy
		539	// we have to connect to all hosts...
		540	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		541	if ((*c)->conf != THISNODE)
		542	(*c)->inject_data_packet (pkt);
		543	}
231	}	544	}
232		545
233	void	546	void
234	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	547	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
235	{	548	{
236	unsigned int src = pkt->src ();	549	unsigned int src = pkt->src ();
237	unsigned int dst = pkt->dst ();	550	unsigned int dst = pkt->dst ();
238		551
239	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	552	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
240	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	553	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
241		554
242	if (src == 0 \|\| src > conns.size ()	555	if (src == 0 \|\| src > conns.size ()
243	\|\| dst > conns.size ()	556	\|\| dst > conns.size ()
244	\|\| pkt->typ () >= vpn_packet::PT_MAX)	557	\|\| pkt->typ () >= vpn_packet::PT_MAX)
245	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	558	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
246	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
247	else if (dst > conns.size ())
248	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
249	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	559	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
250	else	560	else
251	{	561	{
252	connection *c = conns[src - 1];	562	connection *c = conns[src - 1];
253		563
254	if (dst == 0 && !THISNODE->routerprio)	564	if (dst == 0)
255	slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),	565	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
256	c->conf->nodename, (const char *)rsi);	566	c->conf->nodename, (const char *)rsi);
257	else if (dst != 0 && dst != THISNODE->id)	567	else if (dst != THISNODE->id)
258	{	568	{
259	if (THISNODE->routerprio)	569	if (THISNODE->routerprio)
260	// the tos setting gets lost here. who cares.	570	// the tos setting gets lost here. who cares.
261	conns[dst - 1]->inject_vpn_packet (pkt);	571	conns[dst - 1]->inject_vpn_packet (pkt);
262	else	572	else
263	slog (L_WARN,	573	slog (L_WARN,
264	_("%s(%s): forwarding request (=> %s), but we are no router"),	574	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
265	c->conf->nodename, (const char *)rsi,	575	c->conf->nodename, (const char *)rsi,
266	conns[dst - 1]->conf->nodename);	576	conns[dst - 1]->conf->nodename);
267	}	577	}
268	else	578	else
269	c->recv_vpn_packet (pkt, rsi);	579	c->recv_vpn_packet (pkt, rsi);
270	}	580	}
271	}	581	}
272		582
273	void	583	bool
274	vpn::udpv4_ev (io_watcher &w, short revents)	584	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
275	{	585	{
276	if (revents & (POLLIN \| POLLERR))	586	switch (si.prot)
		587	{
		588	case PROT_IPv4:
		589	return send_ipv4_packet (pkt, si, tos);
		590
		591	case PROT_UDPv4:
		592	return send_udpv4_packet (pkt, si, tos);
		593
		594	#if ENABLE_TCP
		595	case PROT_TCPv4:
		596	return send_tcpv4_packet (pkt, si, tos);
		597	#endif
		598	#if ENABLE_ICMP
		599	case PROT_ICMPv4:
		600	return send_icmpv4_packet (pkt, si, tos);
		601	#endif
		602	#if ENABLE_DNS
		603	case PROT_DNSv4:
		604	return send_dnsv4_packet (pkt, si, tos);
		605	#endif
		606	default:
		607	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		608	}
		609
		610	return false;
		611	}
		612
		613	inline void
		614	vpn::ipv4_ev (ev::io &w, int revents)
		615	{
		616	if (revents & EV_READ)
277	{	617	{
278	vpn_packet *pkt = new vpn_packet;	618	vpn_packet *pkt = new vpn_packet;
279	struct sockaddr_in sa;	619	struct sockaddr_in sa;
280	socklen_t sa_len = sizeof (sa);	620	socklen_t sa_len = sizeof (sa);
281	int len;	621	int len;
282		622
283	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	623	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
284		624
285	sockinfo si(sa, PROT_UDPv4);	625	sockinfo si(sa, PROT_IPv4);
286		626
287	if (len > 0)	627	if (len > 0)
288	{	628	{
289	pkt->len = len;	629	pkt->len = len;
290		630
		631	// raw sockets deliver the ipv4 header, but don't expect it on sends
		632	pkt->skip_hdr (pkt->ipv4_hdr_len ());
		633
291	recv_vpn_packet (pkt, si);	634	recv_vpn_packet (pkt, si);
292	}	635	}
293	else	636	else
294	{	637	{
295	// probably ECONNRESET or somesuch	638	// probably ECONNRESET or somesuch
296	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	639	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
297	}	640	}
298		641
299	delete pkt;	642	delete pkt;
300	}	643	}
301	else if (revents & POLLHUP)
302	{
303	// this cannot ;) happen on udp sockets
304	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
305	exit (1);
306	}
307	else	644	else
308	{	645	{
309	slog (L_ERR,	646	slog (L_ERR,
310	_("FATAL: unknown revents %08x in socket, terminating\n"),	647	_("FATAL: unknown revents %08x in socket, exiting.\n"),
311	revents);	648	revents);
312	exit (1);	649	exit (EXIT_FAILURE);
313	}	650	}
314	}	651	}
315		652
316	void	653	#if ENABLE_ICMP
		654	inline void
317	vpn::ipv4_ev (io_watcher &w, short revents)	655	vpn::icmpv4_ev (ev::io &w, int revents)
318	{	656	{
319	if (revents & (POLLIN \| POLLERR))	657	if (revents & EV_READ)
320	{	658	{
321	vpn_packet *pkt = new vpn_packet;	659	vpn_packet *pkt = new vpn_packet;
322	struct sockaddr_in sa;	660	struct sockaddr_in sa;
323	socklen_t sa_len = sizeof (sa);	661	socklen_t sa_len = sizeof (sa);
324	int len;	662	int len;
325		663
326	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	664	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
327		665
328	sockinfo si(sa, PROT_IPv4);	666	sockinfo si(sa, PROT_ICMPv4);
329		667
330	if (len > 0)	668	if (len > 0)
331	{	669	{
332	pkt->len = len;	670	pkt->len = len;
333		671
		672	icmp_header hdr = (icmp_header )&((*pkt)[IP_OVERHEAD]);
		673
		674	if (hdr->type == ::conf.icmp_type
		675	&& hdr->code == 255)
		676	{
334	// raw sockets deliver the ipv4, but don't expect it on sends	677	// raw sockets deliver the ipv4, but don't expect it on sends
335	// this is slow, but...	678	// this is slow, but...
336	pkt->skip_hdr (IP_OVERHEAD);	679	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
		680
		681	recv_vpn_packet (pkt, si);
		682	}
		683	}
		684	else
		685	{
		686	// probably ECONNRESET or somesuch
		687	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
		688	}
		689
		690	delete pkt;
		691	}
		692	else
		693	{
		694	slog (L_ERR,
		695	_("FATAL: unknown revents %08x in socket, exiting.\n"),
		696	revents);
		697	exit (EXIT_FAILURE);
		698	}
		699	}
		700	#endif
		701
		702	inline void
		703	vpn::udpv4_ev (ev::io &w, int revents)
		704	{
		705	if (revents & EV_READ)
		706	{
		707	vpn_packet *pkt = new vpn_packet;
		708	struct sockaddr_in sa;
		709	socklen_t sa_len = sizeof (sa);
		710	int len;
		711
		712	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
		713
		714	sockinfo si(sa, PROT_UDPv4);
		715
		716	if (len > 0)
		717	{
		718	pkt->len = len;
337		719
338	recv_vpn_packet (pkt, si);	720	recv_vpn_packet (pkt, si);
339	}	721	}
340	else	722	else
341	{	723	{
342	// probably ECONNRESET or somesuch	724	// probably ECONNRESET or somesuch
343	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	725	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
344	}	726	}
345		727
346	delete pkt;	728	delete pkt;
347	}	729	}
348	else if (revents & POLLHUP)
349	{
350	// this cannot ;) happen on udp sockets
351	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
352	exit (1);
353	}
354	else	730	else
355	{	731	{
356	slog (L_ERR,	732	slog (L_ERR,
357	_("FATAL: unknown revents %08x in socket, terminating\n"),	733	_("FATAL: unknown revents %08x in socket, exiting.\n"),
358	revents);	734	revents);
359	exit (1);	735	exit (EXIT_FAILURE);
360	}	736	}
361	}	737	}
362		738
363	void	739	inline void
364	vpn::tap_ev (io_watcher &w, short revents)	740	vpn::tap_ev (ev::io &w, int revents)
365	{	741	{
366	if (revents & POLLIN)	742	if (revents & EV_READ)
367	{	743	{
368	/* process data */	744	/* process data */
369	tap_packet *pkt;	745	tap_packet *pkt;
370		746
371	pkt = tap->recv ();	747	pkt = tap->recv ();
372		748
		749	if (!pkt)
		750	return;
		751
		752	if (pkt->len > 14)
		753	{
373	int dst = mac2id (pkt->dst);	754	int dst = mac2id (pkt->dst);
374	int src = mac2id (pkt->src);	755	int src = mac2id (pkt->src);
375		756
376	if (src != THISNODE->id)	757	if (src != THISNODE->id)
377	{
378	slog (L_ERR, _("FATAL: tap packet not originating on current node received, terminating."));
379	exit (1);
380	}
381
382	if (dst == THISNODE->id)
383	{
384	slog (L_ERR, _("FATAL: tap packet destined for current node received, terminating."));
385	exit (1);
386	}
387
388	if (dst > conns.size ())
389	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
390	else
391	{
392	if (dst)
393	{	758	{
394	// unicast	759	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
395	if (dst != THISNODE->id)	760	exit (EXIT_FAILURE);
396	conns[dst - 1]->inject_data_packet (pkt);
397	}	761	}
		762
		763	if (dst == THISNODE->id)
		764	{
		765	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		766	exit (EXIT_FAILURE);
		767	}
		768
		769	if (dst > conns.size ())
		770	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
398	else	771	else
399	{
400	// broadcast, first check router, then self, then english
401	connection *router = find_router ();
402
403	if (router)
404	router->inject_data_packet (pkt, true);	772	inject_data_packet (pkt, dst);
405	else
406	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
407	if ((*c)->conf != THISNODE)
408	(*c)->inject_data_packet (pkt);
409	}
410	}	773	}
411		774
412	delete pkt;	775	delete pkt;
413	}
414	else if (revents & (POLLHUP \| POLLERR))
415	{
416	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
417	exit (1);
418	}	776	}
419	else	777	else
420	abort ();	778	abort ();
421	}	779	}
422		780
423	void	781	inline void
424	vpn::event_cb (time_watcher &w)	782	vpn::event_cb (ev::timer &w, int)
425	{	783	{
426	if (events)	784	if (events)
427	{	785	{
428	if (events & EVENT_SHUTDOWN)	786	if (events & EVENT_SHUTDOWN)
429	{	787	{
430	slog (L_INFO, _("preparing shutdown..."));	788	slog (L_INFO, _("preparing shutdown..."));
431		789
432	shutdown_all ();	790	shutdown_all ();
433
434	remove_pid (pidfilename);	791	remove_pid (conf.pidfilename);
435
436	slog (L_INFO, _("terminating"));	792	slog (L_INFO, _("exiting."));
437		793	exit (EXIT_SUCCESS);
438	exit (0);
439	}	794	}
440		795
441	if (events & EVENT_RECONNECT)	796	if (events & EVENT_RECONNECT)
442	{	797	{
443	slog (L_INFO, _("forced reconnect"));	798	slog (L_INFO, _("forced reconnect."));
444		799
445	reconnect_all ();	800	reconnect_all ();
446	}	801	}
447		802
448	events = 0;	803	events = 0;
449	}	804	}
450
451	w.at = TSTAMP_CANCEL;
452	}	805	}
453		806
454	void	807	void
455	vpn::shutdown_all ()	808	vpn::shutdown_all ()
456	{	809	{
…		…
466		819
467	conns.clear ();	820	conns.clear ();
468		821
469	connection_init ();	822	connection_init ();
470		823
471	for (configuration::node_vector::iterator i = conf.nodes.begin ();	824	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
472	i != conf.nodes.end (); ++i)	825	conns.push_back (new connection (this, *i));
473	{
474	connection *conn = new connection (this);
475		826
476	conn->conf = *i;	827	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
477	conns.push_back (conn);
478
479	conn->establish_connection ();	828	(*c)->establish_connection ();
480	}
481	}	829	}
482		830
483	connection *vpn::find_router ()	831	bool
		832	vpn::can_direct (conf_node src, conf_node dst) const
484	{	833	{
485	u32 prio = 0;	834	return src != dst
		835	&& src->may_direct (dst)
		836	&& dst->may_direct (src)
		837	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		838	\|\| (src->protocols & dst->connectable_protocols ()));
		839	}
		840
		841	// only works for indirect and routed connections: find a router
		842	// from THISNODE to dst
		843	connection *
		844	vpn::find_router_for (const connection *dst)
		845	{
486	connection *router = 0;	846	connection *router = 0;
487		847
		848	// first try to find a router with a direct connection, route there
		849	// regardless of any other considerations.
		850	{
		851	u32 prio = 1;
		852
		853	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		854	{
		855	connection c = i;
		856
		857	if (c->conf->routerprio > prio
		858	&& c->conf != THISNODE
		859	&& can_direct (c->conf, dst->conf)
		860	&& c->ictx && c->octx)
		861	{
		862	prio = c->conf->routerprio;
		863	router = c;
		864	}
		865	}
		866	}
		867
		868	if (router)
		869	return router;
		870
		871	// second try find the router with the highest priority, higher than ours
		872	{
		873	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		874
		875	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		876	{
		877	connection c = i;
		878
		879	if (c->conf->routerprio > prio
		880	&& c != dst
		881	&& c->conf != THISNODE
		882	&& c->ictx && c->octx)
		883	{
		884	prio = c->conf->routerprio;
		885	router = c;
		886	}
		887	}
		888	}
		889
		890	return router;
		891	}
		892
		893	void
		894	vpn::connection_established (connection *c)
		895	{
488	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	896	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
489	{	897	{
490	connection c = i;	898	connection o = i;
491		899
492	if (c->conf->routerprio > prio	900	if (!o->is_direct
493	&& c->connectmode == conf_node::C_ALWAYS	901	&& o->si.valid ()
494	&& c->conf != THISNODE	902	&& c->si != o->si
495	&& c->ictx && c->octx)	903	&& c == find_router_for (o))
496	{
497	prio = c->conf->routerprio;
498	router = c;
499	}	904	{
		905	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		906	o->conf->nodename, c->conf->nodename);
		907	o->rekey ();
		908	}
500	}	909	}
501
502	return router;
503	}	910	}
504		911
		912	void
505	void vpn::send_connect_request (int id)	913	vpn::send_connect_request (connection *c)
506	{	914	{
507	connection *c = find_router ();	915	connection *r = find_router_for (c);
508		916
509	if (c)	917	if (r)
		918	{
		919	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		920	c->conf->nodename, r->conf->nodename);
510	c->send_connect_request (id);	921	r->send_connect_request (c->conf->id);
		922	}
511	else	923	else
512	// no router found, aggressively connect to all routers	924	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
513	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	925	c->conf->nodename);
514	if ((*i)->conf->routerprio)
515	(*i)->establish_connection ();
516	}	926	}
517		927
518	void	928	void
519	connection::dump_status ()	929	connection::dump_status ()
520	{	930	{
521	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	931	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
522	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	932	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
523	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	933	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
524	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	934	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
525	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	935	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
526	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
527	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
528	}	936	}
529		937
530	void	938	void
531	vpn::dump_status ()	939	vpn::dump_status ()
532	{	940	{
533	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	941	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
534		942
535	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	943	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
536	(*c)->dump_status ();	944	(*c)->dump_status ();
537		945
538	slog (L_NOTICE, _("END status dump"));	946	slog (L_NOTICE, _("END status dump"));
539	}	947	}
540		948
541	vpn::vpn (void)	949	vpn::vpn (void)
542	: event(this, &vpn::event_cb)	950	{
		951	event .set<vpn, &vpn::event_cb > (this);
543	, udpv4_ev_watcher(this, &vpn::udpv4_ev)	952	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
544	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	953	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
545	, tap_ev_watcher (this, &vpn::tap_ev)
546	#if ENABLE_TCP	954	#if ENABLE_TCP
547	, tcpv4_ev_watcher(this, &vpn::tcpv4_ev)	955	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
548	#endif	956	#endif
549	{	957	#if ENABLE_ICMP
		958	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
		959	#endif
		960	#if ENABLE_DNS
		961	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		962	#endif
		963	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
550	}	964	}
551		965
552	vpn::~vpn ()	966	vpn::~vpn ()
553	{	967	{
554	}	968	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.8 by pcg, Mon Apr 7 01:28:56 2003 UTC vs. Revision 1.64 by root, Tue Dec 4 10:29:43 2012 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.8 by pcg, Mon Apr 7 01:28:56 2003 UTC vs.
Revision 1.64 by root, Tue Dec 4 10:29:43 2012 UTC