[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 1.66 by root, Thu Jul 18 13:35:16 2013 UTC

…		…
1	/*	1	/*
2	vpn.C -- handle the protocol, encryption, handshaking etc.	2	vpn.C -- handle the protocol, encryption, handshaking etc.
		3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
3		4
		5	This file is part of GVPE.
		6
4	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
5	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
6	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
7	(at your option) any later version.	10	option) any later version.
8		11
9	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
10	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
12	GNU General Public License for more details.	15	Public License for more details.
13		16
14	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
15	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
16	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
17	*/	30	*/
18		31
19	#include "config.h"	32	#include "config.h"
20		33
21	#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 % 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
70	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	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	return conf.config_filename (::conf.script_if_up, "if-up");
		119	}
		120
		121	int
		122	vpn::setup_socket (u8 prot, int family, int type, int proto)
		123	{
		124	int fd = socket (family, type, proto);
		125
		126	if (fd < 0)
		127	{
		128	slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno));
		129	return fd;
		130	}
		131
		132	fcntl (fd, F_SETFL, O_NONBLOCK);
		133	fcntl (fd, F_SETFD, FD_CLOEXEC);
		134
		135	#ifdef SO_MARK
		136	if (::conf.nfmark)
		137	if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark))
		138	slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno));
		139	#endif
		140
		141	return fd;
71	}	142	}
72		143
73	int	144	int
74	vpn::setup ()	145	vpn::setup ()
75	{	146	{
		147	int success = 0;
		148
		149	ipv4_tos = -1;
76	ipv4_fd = -1;	150	ipv4_fd = -1;
77		151
78	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	152	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
79	{	153	{
80	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	154	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
81		155
82	if (ipv4_fd < 0)	156	if (ipv4_fd < 0)
83	return -1;	157	return -1;
84		158
85	sockinfo si (THISNODE, PROT_IPv4);	159	#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	160	// this I really consider a linux bug. I am neither connected
95	// nor do I fragment myself. Linux still sets DF and doesn't	161	// nor do I fragment myself. Linux still sets DF and doesn't
96	// fragment for me sometimes.	162	// fragment for me sometimes.
97	{	163	{
98	int oval = IP_PMTUDISC_DONT;	164	int oval = IP_PMTUDISC_DONT;
99	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	165	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
100	}	166	}
101	#endif	167	#endif
102		168
		169	sockinfo si (THISNODE, PROT_IPv4);
		170
		171	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
		172	{
		173	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
		174	return -1;
		175	}
		176
103	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	177	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		178	++success;
104	}	179	}
		180	else
		181	THISNODE->protocols &= ~PROT_IPv4;
105		182
		183	udpv4_tos = -1;
106	udpv4_fd = -1;	184	udpv4_fd = -1;
107		185
108	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	186	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
109	{	187	{
110	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	188	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
111		189
112	if (udpv4_fd < 0)	190	if (udpv4_fd < 0)
113	return -1;	191	return -1;
114		192
115	// standard daemon practise...	193	// standard daemon practise...
116	{	194	{
117	int oval = 1;	195	int oval = 1;
118	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	196	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
119	}	197	}
120		198
121	sockinfo si (THISNODE, PROT_UDPv4);	199	#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	200	// this I really consider a linux bug. I am neither connected
131	// nor do I fragment myself. Linux still sets DF and doesn't	201	// nor do I fragment myself. Linux still sets DF and doesn't
132	// fragment for me sometimes.	202	// fragment for me sometimes.
133	{	203	{
134	int oval = IP_PMTUDISC_DONT;	204	int oval = IP_PMTUDISC_DONT;
135	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	205	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
136	}	206	}
137	#endif	207	#endif
138		208
		209	sockinfo si (THISNODE, PROT_UDPv4);
		210
		211	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
		212	{
		213	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		214	return -1;
		215	}
		216
139	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	217	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		218	++success;
		219	}
		220	else
		221	THISNODE->protocols &= ~PROT_UDPv4;
		222
		223	icmpv4_tos = -1;
		224	icmpv4_fd = -1;
		225
		226	#if ENABLE_ICMP
		227	if (THISNODE->protocols & PROT_ICMPv4)
		228	{
		229	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
		230
		231	if (icmpv4_fd < 0)
		232	return -1;
		233
		234	#ifdef ICMP_FILTER
		235	{
		236	icmp_filter oval;
		237	oval.data = 0xffffffff;
		238	if (::conf.icmp_type < 32)
		239	oval.data &= ~(1 << ::conf.icmp_type);
		240
		241	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
140	}	242	}
		243	#endif
		244
		245	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		246	// this I really consider a linux bug. I am neither connected
		247	// nor do I fragment myself. Linux still sets DF and doesn't
		248	// fragment for me sometimes.
		249	{
		250	int oval = IP_PMTUDISC_DONT;
		251	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		252	}
		253	#endif
		254
		255	sockinfo si (THISNODE, PROT_ICMPv4);
		256
		257	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
		258	{
		259	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		260	return -1;
		261	}
		262
		263	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		264	++success;
		265	}
		266	#endif
141		267
142	tcpv4_fd = -1;	268	tcpv4_fd = -1;
143		269
144	#if ENABLE_TCP	270	#if ENABLE_TCP
145	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	271	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
146	{	272	{
147	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	273	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
148		274
149	if (tcpv4_fd < 0)	275	if (tcpv4_fd < 0)
150	return -1;	276	return -1;
151		277
152	// standard daemon practise...	278	// standard daemon practise...
157		283
158	sockinfo si (THISNODE, PROT_TCPv4);	284	sockinfo si (THISNODE, PROT_TCPv4);
159		285
160	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	286	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
161	{	287	{
162	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	288	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
163	exit (1);	289	return -1;
164	}	290	}
165		291
166	if (listen (tcpv4_fd, 5))	292	if (listen (tcpv4_fd, 5))
167	{	293	{
168	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	294	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
169	exit (1);	295	return -1;
		296	}
		297
		298	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		299	++success;
		300	}
		301	else
		302	THISNODE->protocols &= ~PROT_TCPv4;
		303	#endif
		304
		305	dnsv4_tos = -1;
		306	dnsv4_fd = -1;
		307
		308	#if ENABLE_DNS
		309	if (THISNODE->protocols & PROT_DNSv4)
		310	{
		311	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		312
		313	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		314
		315	if (dnsv4_fd < 0)
		316	return -1;
		317
		318	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		319	// this I really consider a linux bug. I am neither connected
		320	// nor do I fragment myself. Linux still sets DF and doesn't
		321	// fragment for me sometimes.
		322	{
		323	int oval = IP_PMTUDISC_DONT;
		324	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
170	}	325	}
171
172	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
173	}
174	#endif	326	# endif
		327
		328	// standard daemon practise...
		329	{
		330	int oval = 1;
		331	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		332	}
		333
		334	sockinfo si (THISNODE->dns_hostname,
		335	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		336	PROT_DNSv4);
		337
		338	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		339	{
		340	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		341	return -1;
		342	}
		343
		344	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		345	++success;
		346	}
		347	#endif
		348
		349	/////////////////////////////////////////////////////////////////////////////
		350
		351	if (!success)
		352	{
		353	slog (L_ERR, _("no protocols enabled."));
		354	return -1;
		355	}
		356
		357	reconnect_all ();
		358
		359	/////////////////////////////////////////////////////////////////////////////
175		360
176	tap = new tap_device ();	361	tap = new tap_device ();
177	if (!tap) //D this, of course, never catches	362	if (!tap) //D this, of course, never catches
178	{	363	{
179	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	364	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
180	exit (1);	365	return -1;
181	}	366	}
182		367
183	run_script (run_script_cb (this, &vpn::script_if_up), true);	368	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
184		369
		370	run_script_cb cb;
		371	cb.set<vpn, &vpn::script_if_init> (this);
		372
		373	if (tap->if_up () &&
		374	!run_script (cb, true))
		375	{
		376	slog (L_ERR, _("interface initialization command '%s' failed."),
		377	tap->if_up ());
		378	return -1;
		379	}
		380
		381	cb.set<vpn, &vpn::script_if_up> (this);
		382	if (!run_script (cb, true))
		383	{
		384	slog (L_ERR, _("if-up command execution failed."));
		385	return -1;
		386	}
		387
185	tap_ev_watcher.start (tap->fd, POLLIN);	388	tap_ev_watcher.start (tap->fd, EV_READ);
186
187	reconnect_all ();
188		389
189	return 0;	390	return 0;
190	}	391	}
191		392
192	// send a vpn packet out to other hosts
193	bool	393	bool
194	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	394	vpn::drop_privileges ()
195	{	395	{
196	switch (si.prot)	396	if (::conf.change_root)
		397	{
		398	if (!strcmp (::conf.change_root, "/"))
		399	{
		400	char dir [L_tmpnam];
		401	if (!tmpnam (dir))
		402	{
		403	slog (L_CRIT, _("unable to create anonymous root path."));
		404	return false;
		405	}
		406
		407	if (mkdir (dir, 0700))
		408	{
		409	slog (L_CRIT, _("unable to crate anonymous root directory."));
		410	return false;
		411	}
		412
		413	if (chdir (dir))
		414	{
		415	slog (L_CRIT, _("unable to change to anonymous root directory."));
		416	return false;
		417	}
		418
		419	if (rmdir (dir))
		420	slog (L_ERR, _("unable to remove anonymous root directory, continuing."));
		421	}
		422	else
		423	{
		424	if (chdir (::conf.change_root))
		425	{
		426	slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root);
		427	return false;
		428	}
		429	}
		430
		431	if (chroot ("."))
		432	{
		433	slog (L_CRIT, _("unable to set new root directory."));
		434	return false;
		435	}
		436
		437	if (chdir ("/"))
		438	{
		439	slog (L_CRIT, _("unable to set cwd to new root directory."));
		440	return false;
		441	}
		442	}
		443
		444	if (::conf.change_gid)
		445	if (setgid (::conf.change_gid))
197	{	446	{
198	case PROT_IPv4:	447	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;	448	return false;
212	}	449	}
		450
		451	if (::conf.change_uid)
		452	if (setuid (::conf.change_uid))
		453	{
		454	slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid);
		455	return false;
		456	}
		457
		458	return true;
213	}	459	}
214		460
215	bool	461	bool
216	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	462	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
217	{	463	{
218	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	464	set_tos (ipv4_fd, ipv4_tos, tos);
219	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	465	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
220		466
221	return true;	467	return true;
222	}	468	}
		469
		470	static u16
		471	ipv4_checksum (u16 *data, unsigned int len)
		472	{
		473	// use 32 bit accumulator and fold back carry bits at the end
		474	u32 sum = 0;
		475
		476	while (len > 1)
		477	{
		478	sum += *data++;
		479	len -= 2;
		480	}
		481
		482	// odd byte left?
		483	if (len)
		484	sum += (u8 )data;
		485
		486	// add back carry bits
		487	sum = (sum >> 16) + (sum & 0xffff); // lo += hi
		488	sum += (sum >> 16); // carry
		489
		490	return ~sum;
		491	}
		492
		493	#if ENABLE_ICMP
		494	bool
		495	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		496	{
		497	pkt->unshift_hdr (4);
		498
		499	icmp_header hdr = (icmp_header )&((*pkt)[0]);
		500	hdr->type = ::conf.icmp_type;
		501	hdr->code = 255;
		502	hdr->checksum = 0;
		503	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
		504
		505	set_tos (icmpv4_fd, icmpv4_tos, tos);
		506	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		507
		508	return true;
		509	}
		510	#endif
223		511
224	bool	512	bool
225	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	513	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
226	{	514	{
227	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	515	set_tos (udpv4_fd, udpv4_tos, tos);
228	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	516	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
229		517
230	return true;	518	return true;
		519	}
		520
		521	void
		522	vpn::inject_data_packet (tap_packet *pkt, int dst)
		523	{
		524	if (dst)
		525	{
		526	// unicast
		527	if (dst != THISNODE->id)
		528	conns[dst - 1]->inject_data_packet (pkt);
		529	}
		530	else
		531	{
		532	// broadcast, this is ugly, but due to the security policy
		533	// we have to connect to all hosts...
		534	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		535	if ((*c)->conf != THISNODE)
		536	(*c)->inject_data_packet (pkt);
		537	}
231	}	538	}
232		539
233	void	540	void
234	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	541	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
235	{	542	{
236	unsigned int src = pkt->src ();	543	unsigned int src = pkt->src ();
237	unsigned int dst = pkt->dst ();	544	unsigned int dst = pkt->dst ();
238		545
239	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	546	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);	547	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
241		548
242	if (src == 0 \|\| src > conns.size ()	549	if (src == 0 \|\| src > conns.size ()
243	\|\| dst > conns.size ()	550	\|\| dst > conns.size ()
244	\|\| pkt->typ () >= vpn_packet::PT_MAX)	551	\|\| pkt->typ () >= vpn_packet::PT_MAX)
245	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	552	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 ());	553	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
250	else	554	else
251	{	555	{
252	connection *c = conns[src - 1];	556	connection *c = conns[src - 1];
253		557
254	if (dst == 0 && !THISNODE->routerprio)	558	if (dst == 0)
255	slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),	559	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
256	c->conf->nodename, (const char *)rsi);	560	c->conf->nodename, (const char *)rsi);
257	else if (dst != 0 && dst != THISNODE->id)	561	else if (dst != THISNODE->id)
258	{	562	{
259	if (THISNODE->routerprio)	563	if (THISNODE->routerprio)
260	// the tos setting gets lost here. who cares.	564	// the tos setting gets lost here. who cares.
261	conns[dst - 1]->inject_vpn_packet (pkt);	565	conns[dst - 1]->inject_vpn_packet (pkt);
262	else	566	else
263	slog (L_WARN,	567	slog (L_WARN,
264	_("%s(%s): forwarding request (=> %s), but we are no router"),	568	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
265	c->conf->nodename, (const char *)rsi,	569	c->conf->nodename, (const char *)rsi,
266	conns[dst - 1]->conf->nodename);	570	conns[dst - 1]->conf->nodename);
267	}	571	}
268	else	572	else
269	c->recv_vpn_packet (pkt, rsi);	573	c->recv_vpn_packet (pkt, rsi);
270	}	574	}
271	}	575	}
272		576
273	void	577	bool
274	vpn::udpv4_ev (io_watcher &w, short revents)	578	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
275	{	579	{
276	if (revents & (POLLIN \| POLLERR))	580	switch (si.prot)
		581	{
		582	case PROT_IPv4:
		583	return send_ipv4_packet (pkt, si, tos);
		584
		585	case PROT_UDPv4:
		586	return send_udpv4_packet (pkt, si, tos);
		587
		588	#if ENABLE_TCP
		589	case PROT_TCPv4:
		590	return send_tcpv4_packet (pkt, si, tos);
		591	#endif
		592	#if ENABLE_ICMP
		593	case PROT_ICMPv4:
		594	return send_icmpv4_packet (pkt, si, tos);
		595	#endif
		596	#if ENABLE_DNS
		597	case PROT_DNSv4:
		598	return send_dnsv4_packet (pkt, si, tos);
		599	#endif
		600	default:
		601	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		602	}
		603
		604	return false;
		605	}
		606
		607	inline void
		608	vpn::ipv4_ev (ev::io &w, int revents)
		609	{
		610	if (revents & EV_READ)
277	{	611	{
278	vpn_packet *pkt = new vpn_packet;	612	vpn_packet *pkt = new vpn_packet;
279	struct sockaddr_in sa;	613	struct sockaddr_in sa;
280	socklen_t sa_len = sizeof (sa);	614	socklen_t sa_len = sizeof (sa);
281	int len;	615	int len;
282		616
283	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	617	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
284		618
285	sockinfo si(sa, PROT_UDPv4);	619	sockinfo si(sa, PROT_IPv4);
286		620
287	if (len > 0)	621	if (len > 0)
288	{	622	{
289	pkt->len = len;	623	pkt->len = len;
290		624
		625	// raw sockets deliver the ipv4 header, but don't expect it on sends
		626	pkt->skip_hdr (pkt->ipv4_hdr_len ());
		627
291	recv_vpn_packet (pkt, si);	628	recv_vpn_packet (pkt, si);
292	}	629	}
293	else	630	else
294	{	631	{
295	// probably ECONNRESET or somesuch	632	// probably ECONNRESET or somesuch
296	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	633	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
297	}	634	}
298		635
299	delete pkt;	636	delete pkt;
300	}	637	}
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	638	else
308	{	639	{
309	slog (L_ERR,	640	slog (L_ERR,
310	_("FATAL: unknown revents %08x in socket, terminating\n"),	641	_("FATAL: unknown revents %08x in socket, exiting.\n"),
311	revents);	642	revents);
312	exit (1);	643	exit (EXIT_FAILURE);
313	}	644	}
314	}	645	}
315		646
316	void	647	#if ENABLE_ICMP
		648	inline void
317	vpn::ipv4_ev (io_watcher &w, short revents)	649	vpn::icmpv4_ev (ev::io &w, int revents)
318	{	650	{
319	if (revents & (POLLIN \| POLLERR))	651	if (revents & EV_READ)
320	{	652	{
321	vpn_packet *pkt = new vpn_packet;	653	vpn_packet *pkt = new vpn_packet;
322	struct sockaddr_in sa;	654	struct sockaddr_in sa;
323	socklen_t sa_len = sizeof (sa);	655	socklen_t sa_len = sizeof (sa);
324	int len;	656	int len;
325		657
326	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	658	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
327		659
328	sockinfo si(sa, PROT_IPv4);	660	sockinfo si(sa, PROT_ICMPv4);
329		661
330	if (len > 0)	662	if (len > 0)
331	{	663	{
332	pkt->len = len;	664	pkt->len = len;
333		665
		666	icmp_header hdr = (icmp_header )&((*pkt)[IP_OVERHEAD]);
		667
		668	if (hdr->type == ::conf.icmp_type
		669	&& hdr->code == 255)
		670	{
334	// raw sockets deliver the ipv4, but don't expect it on sends	671	// raw sockets deliver the ipv4, but don't expect it on sends
335	// this is slow, but...	672	// this is slow, but...
336	pkt->skip_hdr (IP_OVERHEAD);	673	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
		674
		675	recv_vpn_packet (pkt, si);
		676	}
		677	}
		678	else
		679	{
		680	// probably ECONNRESET or somesuch
		681	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
		682	}
		683
		684	delete pkt;
		685	}
		686	else
		687	{
		688	slog (L_ERR,
		689	_("FATAL: unknown revents %08x in socket, exiting.\n"),
		690	revents);
		691	exit (EXIT_FAILURE);
		692	}
		693	}
		694	#endif
		695
		696	inline void
		697	vpn::udpv4_ev (ev::io &w, int revents)
		698	{
		699	if (revents & EV_READ)
		700	{
		701	vpn_packet *pkt = new vpn_packet;
		702	struct sockaddr_in sa;
		703	socklen_t sa_len = sizeof (sa);
		704	int len;
		705
		706	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
		707
		708	sockinfo si(sa, PROT_UDPv4);
		709
		710	if (len > 0)
		711	{
		712	pkt->len = len;
337		713
338	recv_vpn_packet (pkt, si);	714	recv_vpn_packet (pkt, si);
339	}	715	}
340	else	716	else
341	{	717	{
342	// probably ECONNRESET or somesuch	718	// probably ECONNRESET or somesuch
343	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	719	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
344	}	720	}
345		721
346	delete pkt;	722	delete pkt;
347	}	723	}
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	724	else
355	{	725	{
356	slog (L_ERR,	726	slog (L_ERR,
357	_("FATAL: unknown revents %08x in socket, terminating\n"),	727	_("FATAL: unknown revents %08x in socket, exiting.\n"),
358	revents);	728	revents);
359	exit (1);	729	exit (EXIT_FAILURE);
360	}	730	}
361	}	731	}
362		732
363	void	733	inline void
364	vpn::tap_ev (io_watcher &w, short revents)	734	vpn::tap_ev (ev::io &w, int revents)
365	{	735	{
366	if (revents & POLLIN)	736	if (revents & EV_READ)
367	{	737	{
368	/* process data */	738	/* process data */
369	tap_packet *pkt;	739	tap_packet *pkt;
370		740
371	pkt = tap->recv ();	741	pkt = tap->recv ();
372		742
		743	if (!pkt)
		744	return;
		745
		746	if (pkt->len > 14)
		747	{
373	int dst = mac2id (pkt->dst);	748	int dst = mac2id (pkt->dst);
374	int src = mac2id (pkt->src);	749	int src = mac2id (pkt->src);
375		750
376	if (src != THISNODE->id)	751	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	{	752	{
394	// unicast	753	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
395	if (dst != THISNODE->id)	754	exit (EXIT_FAILURE);
396	conns[dst - 1]->inject_data_packet (pkt);
397	}	755	}
		756
		757	if (dst == THISNODE->id)
		758	{
		759	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		760	exit (EXIT_FAILURE);
		761	}
		762
		763	if (dst > conns.size ())
		764	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
398	else	765	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);	766	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	}	767	}
411		768
412	delete pkt;	769	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	}	770	}
419	else	771	else
420	abort ();	772	abort ();
421	}	773	}
422		774
423	void	775	inline void
424	vpn::event_cb (time_watcher &w)	776	vpn::event_cb (ev::timer &w, int)
425	{	777	{
426	if (events)	778	if (events)
427	{	779	{
428	if (events & EVENT_SHUTDOWN)	780	if (events & EVENT_SHUTDOWN)
429	{	781	{
430	slog (L_INFO, _("preparing shutdown..."));	782	slog (L_INFO, _("preparing shutdown..."));
431		783
432	shutdown_all ();	784	shutdown_all ();
433
434	remove_pid (pidfilename);	785	remove_pid (conf.pidfilename);
435
436	slog (L_INFO, _("terminating"));	786	slog (L_INFO, _("exiting."));
437		787	exit (EXIT_SUCCESS);
438	exit (0);
439	}	788	}
440		789
441	if (events & EVENT_RECONNECT)	790	if (events & EVENT_RECONNECT)
442	{	791	{
443	slog (L_INFO, _("forced reconnect"));	792	slog (L_INFO, _("forced reconnect."));
444		793
445	reconnect_all ();	794	reconnect_all ();
446	}	795	}
447		796
448	events = 0;	797	events = 0;
449	}	798	}
450
451	w.at = TSTAMP_CANCEL;
452	}	799	}
453		800
454	void	801	void
455	vpn::shutdown_all ()	802	vpn::shutdown_all ()
456	{	803	{
…		…
466		813
467	conns.clear ();	814	conns.clear ();
468		815
469	connection_init ();	816	connection_init ();
470		817
471	for (configuration::node_vector::iterator i = conf.nodes.begin ();	818	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
472	i != conf.nodes.end (); ++i)	819	conns.push_back (new connection (this, *i));
473	{
474	connection *conn = new connection (this);
475		820
476	conn->conf = *i;	821	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
477	conns.push_back (conn);
478
479	conn->establish_connection ();	822	(*c)->establish_connection ();
480	}
481	}	823	}
482		824
483	connection *vpn::find_router ()	825	bool
		826	vpn::can_direct (conf_node src, conf_node dst) const
484	{	827	{
485	u32 prio = 0;	828	return src != dst
		829	&& src->may_direct (dst)
		830	&& dst->may_direct (src)
		831	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		832	\|\| (src->protocols & dst->connectable_protocols ()));
		833	}
		834
		835	// only works for indirect and routed connections: find a router
		836	// from THISNODE to dst
		837	connection *
		838	vpn::find_router_for (const connection *dst)
		839	{
486	connection *router = 0;	840	connection *router = 0;
487		841
		842	// first try to find a router with a direct connection, route there
		843	// regardless of any other considerations.
		844	{
		845	u32 prio = 1;
		846
		847	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		848	{
		849	connection c = i;
		850
		851	if (c->conf->routerprio > prio
		852	&& c->conf != THISNODE
		853	&& can_direct (c->conf, dst->conf)
		854	&& c->ictx && c->octx)
		855	{
		856	prio = c->conf->routerprio;
		857	router = c;
		858	}
		859	}
		860	}
		861
		862	if (router)
		863	return router;
		864
		865	// second try find the router with the highest priority, higher than ours
		866	{
		867	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		868
		869	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		870	{
		871	connection c = i;
		872
		873	if (c->conf->routerprio > prio
		874	&& c != dst
		875	&& c->conf != THISNODE
		876	&& c->ictx && c->octx)
		877	{
		878	prio = c->conf->routerprio;
		879	router = c;
		880	}
		881	}
		882	}
		883
		884	return router;
		885	}
		886
		887	void
		888	vpn::connection_established (connection *c)
		889	{
488	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	890	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
489	{	891	{
490	connection c = i;	892	connection o = i;
491		893
492	if (c->conf->routerprio > prio	894	if (!o->is_direct
493	&& c->connectmode == conf_node::C_ALWAYS	895	&& o->si.valid ()
494	&& c->conf != THISNODE	896	&& c->si != o->si
495	&& c->ictx && c->octx)	897	&& c == find_router_for (o))
496	{
497	prio = c->conf->routerprio;
498	router = c;
499	}	898	{
		899	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		900	o->conf->nodename, c->conf->nodename);
		901	o->rekey ();
		902	}
500	}	903	}
501
502	return router;
503	}	904	}
504		905
		906	void
505	void vpn::send_connect_request (int id)	907	vpn::send_connect_request (connection *c)
506	{	908	{
507	connection *c = find_router ();	909	connection *r = find_router_for (c);
508		910
509	if (c)	911	if (r)
		912	{
		913	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		914	c->conf->nodename, r->conf->nodename);
510	c->send_connect_request (id);	915	r->send_connect_request (c->conf->id);
		916	}
511	else	917	else
512	// no router found, aggressively connect to all routers	918	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)	919	c->conf->nodename);
514	if ((*i)->conf->routerprio)
515	(*i)->establish_connection ();
516	}	920	}
517		921
518	void	922	void
519	connection::dump_status ()	923	connection::dump_status ()
520	{	924	{
521	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	925	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
522	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	926	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
523	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	927	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
524	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	928	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
525	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	929	(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	}	930	}
529		931
530	void	932	void
531	vpn::dump_status ()	933	vpn::dump_status ()
532	{	934	{
533	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	935	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
534		936
535	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	937	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
536	(*c)->dump_status ();	938	(*c)->dump_status ();
537		939
538	slog (L_NOTICE, _("END status dump"));	940	slog (L_NOTICE, _("END status dump"));
539	}	941	}
540		942
541	vpn::vpn (void)	943	vpn::vpn (void)
542	: event(this, &vpn::event_cb)	944	{
		945	event .set<vpn, &vpn::event_cb > (this);
543	, udpv4_ev_watcher(this, &vpn::udpv4_ev)	946	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
544	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	947	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
545	, tap_ev_watcher (this, &vpn::tap_ev)
546	#if ENABLE_TCP	948	#if ENABLE_TCP
547	, tcpv4_ev_watcher(this, &vpn::tcpv4_ev)	949	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
548	#endif	950	#endif
549	{	951	#if ENABLE_ICMP
		952	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
		953	#endif
		954	#if ENABLE_DNS
		955	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		956	#endif
		957	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
550	}	958	}
551		959
552	vpn::~vpn ()	960	vpn::~vpn ()
553	{	961	{
554	}	962	}

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing gvpe/src/vpn.C (file contents): Revision 1.8 by pcg, Mon Apr 7 01:28:56 2003 UTC vs. Revision 1.66 by root, Thu Jul 18 13:35:16 2013 UTC

Diff Legend

Comparing gvpe/src/vpn.C (file contents):
Revision 1.8 by pcg, Mon Apr 7 01:28:56 2003 UTC vs.
Revision 1.66 by root, Thu Jul 18 13:35:16 2013 UTC