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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.19 by pcg, Thu Oct 16 02:41:21 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 Marc Lehmann <pcg@goof.com>	3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
4		4
		5	This file is part of GVPE.
		6
5	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
6	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
7	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
8	(at your option) any later version.	10	option) any later version.
9		11
10	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
11	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13	GNU General Public License for more details.	15	Public License for more details.
14		16
15	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
16	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
17	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.
18	*/	30	*/
19		31
20	#include "config.h"	32	#include "config.h"
21		33
22	#include <list>	34	#include <list>
23		35
		36	#include <cstdio>
		37	#include <cstring>
24	#include <cstdlib>	38	#include <cstdlib>
25	#include <cstring>
26	#include <cstdio>
27		39
28	#include <sys/types.h>	40	#include <sys/types.h>
29	#include <sys/socket.h>	41	#include <sys/socket.h>
30	#include <sys/wait.h>	42	#include <sys/wait.h>
		43	#include <sys/stat.h>
31	#include <errno.h>	44	#include <errno.h>
32	#include <time.h>	45	#include <time.h>
33	#include <unistd.h>	46	#include <unistd.h>
34	#include <fcntl.h>	47	#include <fcntl.h>
35	#include <sys/socket.h>	48	#include <sys/socket.h>
40		53
41	#include "connection.h"	54	#include "connection.h"
42	#include "util.h"	55	#include "util.h"
43	#include "vpn.h"	56	#include "vpn.h"
44		57
		58	using namespace std;
		59
		60	vpn network; // THE vpn (bad design...)
		61
45	/////////////////////////////////////////////////////////////////////////////	62	/////////////////////////////////////////////////////////////////////////////
46		63
47	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 ()
48	{	78	{
49	// the tunnel device mtu should be the physical mtu - overhead	79	// the tunnel device mtu should be the physical mtu - overhead
50	// the tricky part is rounding to the cipher key blocksize	80	// the tricky part is rounding to the cipher key blocksize
51	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	81	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
52	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	82	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
53	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	83	mtu -= mtu % BLOCK_SIZE (CIPHER); // round
54	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	84	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
55		85
56	char *env;	86	char *env;
57	asprintf (&env, "CONFBASE=%s", confbase);	87	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
58	putenv (env);
59	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
60	putenv (env);
61	asprintf (&env, "NODEID=%d", THISNODE->id);
62	putenv (env);
63	asprintf (&env, "IFNAME=%s", tap->interface ());	88	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
64	putenv (env);	89	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		90	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
65	asprintf (&env, "MTU=%d", mtu);	91	asprintf (&env, "MTU=%d", mtu); putenv (env);
66	putenv (env);	92	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
67	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	93	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
68	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
69	THISNODE->id & 0xff);
70	putenv (env);
71		94
72	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;
73	}	142	}
74		143
75	int	144	int
76	vpn::setup ()	145	vpn::setup ()
77	{	146	{
		147	int success = 0;
		148
		149	ipv4_tos = -1;
78	ipv4_fd = -1;	150	ipv4_fd = -1;
79		151
80	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	152	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
81	{	153	{
82	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	154	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
83		155
84	if (ipv4_fd < 0)	156	if (ipv4_fd < 0)
85	return -1;	157	return -1;
86
87	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
88		158
89	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	159	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
90	// this I really consider a linux bug. I am neither connected	160	// this I really consider a linux bug. I am neither connected
91	// 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
92	// fragment for me sometimes.	162	// fragment for me sometimes.
…		…
98		168
99	sockinfo si (THISNODE, PROT_IPv4);	169	sockinfo si (THISNODE, PROT_IPv4);
100		170
101	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	171	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
102	{	172	{
103	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	173	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
104	exit (1);	174	return -1;
105	}	175	}
106		176
107	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	177	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		178	++success;
108	}	179	}
		180	else
		181	THISNODE->protocols &= ~PROT_IPv4;
109		182
		183	udpv4_tos = -1;
110	udpv4_fd = -1;	184	udpv4_fd = -1;
111		185
112	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	186	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
113	{	187	{
114	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	188	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
115		189
116	if (udpv4_fd < 0)	190	if (udpv4_fd < 0)
117	return -1;	191	return -1;
118
119	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
120		192
121	// standard daemon practise...	193	// standard daemon practise...
122	{	194	{
123	int oval = 1;	195	int oval = 1;
124	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	196	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
136		208
137	sockinfo si (THISNODE, PROT_UDPv4);	209	sockinfo si (THISNODE, PROT_UDPv4);
138		210
139	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	211	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
140	{	212	{
141	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	213	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
142	exit (1);	214	return -1;
143	}	215	}
144		216
145	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	217	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		218	++success;
146	}	219	}
		220	else
		221	THISNODE->protocols &= ~PROT_UDPv4;
147		222
		223	icmpv4_tos = -1;
148	icmpv4_fd = -1;	224	icmpv4_fd = -1;
149		225
150	#if ENABLE_ICMP	226	#if ENABLE_ICMP
151	if (THISNODE->protocols & PROT_ICMPv4)	227	if (THISNODE->protocols & PROT_ICMPv4)
152	{	228	{
153	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	229	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
154		230
155	if (icmpv4_fd < 0)	231	if (icmpv4_fd < 0)
156	return -1;	232	return -1;
157
158	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
159		233
160	#ifdef ICMP_FILTER	234	#ifdef ICMP_FILTER
161	{	235	{
162	icmp_filter oval;	236	icmp_filter oval;
163	oval.data = 0xffffffff;	237	oval.data = 0xffffffff;
…		…
172	// this I really consider a linux bug. I am neither connected	246	// this I really consider a linux bug. I am neither connected
173	// nor do I fragment myself. Linux still sets DF and doesn't	247	// nor do I fragment myself. Linux still sets DF and doesn't
174	// fragment for me sometimes.	248	// fragment for me sometimes.
175	{	249	{
176	int oval = IP_PMTUDISC_DONT;	250	int oval = IP_PMTUDISC_DONT;
177	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	251	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
178	}	252	}
179	#endif	253	#endif
180		254
181	sockinfo si (THISNODE, PROT_ICMPv4);	255	sockinfo si (THISNODE, PROT_ICMPv4);
182		256
183	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	257	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
184	{	258	{
185	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	259	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
186	exit (1);	260	return -1;
187	}	261	}
188		262
189	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	263	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		264	++success;
190	}	265	}
191	#endif	266	#endif
192		267
193	tcpv4_fd = -1;	268	tcpv4_fd = -1;
194		269
195	#if ENABLE_TCP	270	#if ENABLE_TCP
196	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	271	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
197	{	272	{
198	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	273	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
199		274
200	if (tcpv4_fd < 0)	275	if (tcpv4_fd < 0)
201	return -1;	276	return -1;
202		277
203	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
204
205	// standard daemon practise...	278	// standard daemon practise...
206	{	279	{
207	int oval = 1;	280	int oval = 1;
208	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	281	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
209	}	282	}
210		283
211	sockinfo si (THISNODE, PROT_TCPv4);	284	sockinfo si (THISNODE, PROT_TCPv4);
212		285
213	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	286	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
214	{	287	{
215	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));
216	exit (1);	289	return -1;
217	}	290	}
218		291
219	if (listen (tcpv4_fd, 5))	292	if (listen (tcpv4_fd, 5))
220	{	293	{
221	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));
222	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);
223	}	325	}
224
225	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
226	}
227	#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	/////////////////////////////////////////////////////////////////////////////
228		360
229	tap = new tap_device ();	361	tap = new tap_device ();
230	if (!tap) //D this, of course, never catches	362	if (!tap) //D this, of course, never catches
231	{	363	{
232	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	364	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
233	exit (1);	365	return -1;
234	}	366	}
235		367
236	run_script (run_script_cb (this, &vpn::script_if_up), true);	368	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
237		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
238	tap_ev_watcher.start (tap->fd, POLLIN);	388	tap_ev_watcher.start (tap->fd, EV_READ);
239
240	reconnect_all ();
241		389
242	return 0;	390	return 0;
243	}	391	}
244		392
245	// send a vpn packet out to other hosts
246	bool	393	bool
247	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	394	vpn::drop_privileges ()
248	{	395	{
249	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))
250	{	446	{
251	case PROT_IPv4:	447	slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid);
252	return send_ipv4_packet (pkt, si, tos);
253
254	case PROT_UDPv4:
255	return send_udpv4_packet (pkt, si, tos);
256
257	#if ENABLE_TCP
258	case PROT_TCPv4:
259	return send_tcpv4_packet (pkt, si, tos);
260	#endif
261
262	#if ENABLE_ICMP
263	case PROT_ICMPv4:
264	return send_icmpv4_packet (pkt, si, tos);
265	#endif
266
267	default:
268	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
269	return false;	448	return false;
270	}	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;
271	}	459	}
272		460
273	bool	461	bool
274	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)
275	{	463	{
276	#if defined(SOL_IP) && defined(IP_TOS)	464	set_tos (ipv4_fd, ipv4_tos, tos);
277	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
278	#endif
279	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 ());
280		466
281	return true;	467	return true;
282	}	468	}
283		469
…		…
306		492
307	#if ENABLE_ICMP	493	#if ENABLE_ICMP
308	bool	494	bool
309	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	495	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
310	{	496	{
311	#if defined(SOL_IP) && defined(IP_TOS)
312	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
313	#endif
314
315	pkt->unshift_hdr (4);	497	pkt->unshift_hdr (4);
316		498
317	icmp_header hdr = (icmp_header )&((*pkt)[0]);	499	icmp_header hdr = (icmp_header )&((*pkt)[0]);
318	hdr->type = ::conf.icmp_type;	500	hdr->type = ::conf.icmp_type;
319	hdr->code = 255;	501	hdr->code = 255;
320	hdr->checksum = 0;	502	hdr->checksum = 0;
321	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	503	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
322		504
		505	set_tos (icmpv4_fd, icmpv4_tos, tos);
323	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	506	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
324		507
325	return true;	508	return true;
326	}	509	}
327	#endif	510	#endif
328		511
329	bool	512	bool
330	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)
331	{	514	{
332	#if defined(SOL_IP) && defined(IP_TOS)	515	set_tos (udpv4_fd, udpv4_tos, tos);
333	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
334	#endif
335	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 ());
336		517
337	return true;	518	return true;
338	}	519	}
339		520
…		…
350	{	531	{
351	// broadcast, this is ugly, but due to the security policy	532	// broadcast, this is ugly, but due to the security policy
352	// we have to connect to all hosts...	533	// we have to connect to all hosts...
353	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	534	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
354	if ((*c)->conf != THISNODE)	535	if ((*c)->conf != THISNODE)
355	(*c)->inject_data_packet (pkt, true);	536	(*c)->inject_data_packet (pkt);
356	}	537	}
357	}	538	}
358		539
359	void	540	void
360	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	541	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
361	{	542	{
362	unsigned int src = pkt->src ();	543	unsigned int src = pkt->src ();
363	unsigned int dst = pkt->dst ();	544	unsigned int dst = pkt->dst ();
364		545
365	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."),
366	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	547	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
367		548
368	if (src == 0 \|\| src > conns.size ()	549	if (src == 0 \|\| src > conns.size ()
369	\|\| dst > conns.size ()	550	\|\| dst > conns.size ()
370	\|\| pkt->typ () >= vpn_packet::PT_MAX)	551	\|\| pkt->typ () >= vpn_packet::PT_MAX)
371	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)."),
372	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
373	else if (dst > conns.size ())
374	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
375	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	553	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
376	else	554	else
377	{	555	{
378	connection *c = conns[src - 1];	556	connection *c = conns[src - 1];
379		557
380	if (dst == 0)	558	if (dst == 0)
381	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	559	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
382	c->conf->nodename, (const char *)rsi);	560	c->conf->nodename, (const char *)rsi);
383	else if (dst != THISNODE->id)	561	else if (dst != THISNODE->id)
384	{	562	{
385	if (THISNODE->routerprio)	563	if (THISNODE->routerprio)
386	// the tos setting gets lost here. who cares.	564	// the tos setting gets lost here. who cares.
387	conns[dst - 1]->inject_vpn_packet (pkt);	565	conns[dst - 1]->inject_vpn_packet (pkt);
388	else	566	else
389	slog (L_WARN,	567	slog (L_WARN,
390	_("%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?)."),
391	c->conf->nodename, (const char *)rsi,	569	c->conf->nodename, (const char *)rsi,
392	conns[dst - 1]->conf->nodename);	570	conns[dst - 1]->conf->nodename);
393	}	571	}
394	else	572	else
395	c->recv_vpn_packet (pkt, rsi);	573	c->recv_vpn_packet (pkt, rsi);
396	}	574	}
397	}	575	}
398		576
399	void	577	bool
		578	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		579	{
		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
400	vpn::ipv4_ev (io_watcher &w, short revents)	608	vpn::ipv4_ev (ev::io &w, int revents)
401	{	609	{
402	if (revents & (POLLIN \| POLLERR))	610	if (revents & EV_READ)
403	{	611	{
404	vpn_packet *pkt = new vpn_packet;	612	vpn_packet *pkt = new vpn_packet;
405	struct sockaddr_in sa;	613	struct sockaddr_in sa;
406	socklen_t sa_len = sizeof (sa);	614	socklen_t sa_len = sizeof (sa);
407	int len;	615	int len;
…		…
412		620
413	if (len > 0)	621	if (len > 0)
414	{	622	{
415	pkt->len = len;	623	pkt->len = len;
416		624
417	// raw sockets deliver the ipv4, but don't expect it on sends	625	// raw sockets deliver the ipv4 header, but don't expect it on sends
418	// this is slow, but...	626	pkt->skip_hdr (pkt->ipv4_hdr_len ());
419	pkt->skip_hdr (IP_OVERHEAD);
420		627
421	recv_vpn_packet (pkt, si);	628	recv_vpn_packet (pkt, si);
422	}	629	}
423	else	630	else
424	{	631	{
425	// probably ECONNRESET or somesuch	632	// probably ECONNRESET or somesuch
426	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	633	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
427	}	634	}
428		635
429	delete pkt;	636	delete pkt;
430	}	637	}
431	else if (revents & POLLHUP)
432	{
433	// this cannot ;) happen on udp sockets
434	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
435	exit (1);
436	}
437	else	638	else
438	{	639	{
439	slog (L_ERR,	640	slog (L_ERR,
440	_("FATAL: unknown revents %08x in socket, terminating\n"),	641	_("FATAL: unknown revents %08x in socket, exiting.\n"),
441	revents);	642	revents);
442	exit (1);	643	exit (EXIT_FAILURE);
443	}	644	}
444	}	645	}
445		646
446	#if ENABLE_ICMP	647	#if ENABLE_ICMP
447	void	648	inline void
448	vpn::icmpv4_ev (io_watcher &w, short revents)	649	vpn::icmpv4_ev (ev::io &w, int revents)
449	{	650	{
450	if (revents & (POLLIN \| POLLERR))	651	if (revents & EV_READ)
451	{	652	{
452	vpn_packet *pkt = new vpn_packet;	653	vpn_packet *pkt = new vpn_packet;
453	struct sockaddr_in sa;	654	struct sockaddr_in sa;
454	socklen_t sa_len = sizeof (sa);	655	socklen_t sa_len = sizeof (sa);
455	int len;	656	int len;
…		…
467	if (hdr->type == ::conf.icmp_type	668	if (hdr->type == ::conf.icmp_type
468	&& hdr->code == 255)	669	&& hdr->code == 255)
469	{	670	{
470	// 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
471	// this is slow, but...	672	// this is slow, but...
472	pkt->skip_hdr (ICMP_OVERHEAD);	673	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
473		674
474	recv_vpn_packet (pkt, si);	675	recv_vpn_packet (pkt, si);
475	}	676	}
476	}	677	}
477	else	678	else
478	{	679	{
479	// probably ECONNRESET or somesuch	680	// probably ECONNRESET or somesuch
480	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	681	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
481	}	682	}
482		683
483	delete pkt;	684	delete pkt;
484	}	685	}
485	else if (revents & POLLHUP)
486	{
487	// this cannot ;) happen on udp sockets
488	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
489	exit (1);
490	}
491	else	686	else
492	{	687	{
493	slog (L_ERR,	688	slog (L_ERR,
494	_("FATAL: unknown revents %08x in socket, terminating\n"),	689	_("FATAL: unknown revents %08x in socket, exiting.\n"),
495	revents);	690	revents);
496	exit (1);	691	exit (EXIT_FAILURE);
497	}	692	}
498	}	693	}
499	#endif	694	#endif
500		695
501	void	696	inline void
502	vpn::udpv4_ev (io_watcher &w, short revents)	697	vpn::udpv4_ev (ev::io &w, int revents)
503	{	698	{
504	if (revents & (POLLIN \| POLLERR))	699	if (revents & EV_READ)
505	{	700	{
506	vpn_packet *pkt = new vpn_packet;	701	vpn_packet *pkt = new vpn_packet;
507	struct sockaddr_in sa;	702	struct sockaddr_in sa;
508	socklen_t sa_len = sizeof (sa);	703	socklen_t sa_len = sizeof (sa);
509	int len;	704	int len;
…		…
519	recv_vpn_packet (pkt, si);	714	recv_vpn_packet (pkt, si);
520	}	715	}
521	else	716	else
522	{	717	{
523	// probably ECONNRESET or somesuch	718	// probably ECONNRESET or somesuch
524	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	719	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
525	}	720	}
526		721
527	delete pkt;	722	delete pkt;
528	}	723	}
529	else if (revents & POLLHUP)
530	{
531	// this cannot ;) happen on udp sockets
532	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
533	exit (1);
534	}
535	else	724	else
536	{	725	{
537	slog (L_ERR,	726	slog (L_ERR,
538	_("FATAL: unknown revents %08x in socket, terminating\n"),	727	_("FATAL: unknown revents %08x in socket, exiting.\n"),
539	revents);	728	revents);
540	exit (1);	729	exit (EXIT_FAILURE);
541	}	730	}
542	}	731	}
543		732
544	void	733	inline void
545	vpn::tap_ev (io_watcher &w, short revents)	734	vpn::tap_ev (ev::io &w, int revents)
546	{	735	{
547	if (revents & POLLIN)	736	if (revents & EV_READ)
548	{	737	{
549	/* process data */	738	/* process data */
550	tap_packet *pkt;	739	tap_packet *pkt;
551		740
552	pkt = tap->recv ();	741	pkt = tap->recv ();
…		…
559	int dst = mac2id (pkt->dst);	748	int dst = mac2id (pkt->dst);
560	int src = mac2id (pkt->src);	749	int src = mac2id (pkt->src);
561		750
562	if (src != THISNODE->id)	751	if (src != THISNODE->id)
563	{	752	{
564	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));	753	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
565	exit (1);	754	exit (EXIT_FAILURE);
566	}	755	}
567		756
568	if (dst == THISNODE->id)	757	if (dst == THISNODE->id)
569	{	758	{
570	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));	759	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
571	exit (1);	760	exit (EXIT_FAILURE);
572	}	761	}
573		762
574	if (dst > conns.size ())	763	if (dst > conns.size ())
575	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);	764	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
576	else	765	else
577	inject_data_packet (pkt, dst);	766	inject_data_packet (pkt, dst);
578	}	767	}
579		768
580	delete pkt;	769	delete pkt;
581	}	770	}
582	else if (revents & (POLLHUP \| POLLERR))
583	{
584	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
585	exit (1);
586	}
587	else	771	else
588	abort ();	772	abort ();
589	}	773	}
590		774
591	void	775	inline void
592	vpn::event_cb (time_watcher &w)	776	vpn::event_cb (ev::timer &w, int)
593	{	777	{
594	if (events)	778	if (events)
595	{	779	{
596	if (events & EVENT_SHUTDOWN)	780	if (events & EVENT_SHUTDOWN)
597	{	781	{
598	slog (L_INFO, _("preparing shutdown..."));	782	slog (L_INFO, _("preparing shutdown..."));
599		783
600	shutdown_all ();	784	shutdown_all ();
601
602	remove_pid (pidfilename);	785	remove_pid (conf.pidfilename);
603
604	slog (L_INFO, _("terminating"));	786	slog (L_INFO, _("exiting."));
605		787	exit (EXIT_SUCCESS);
606	exit (0);
607	}	788	}
608		789
609	if (events & EVENT_RECONNECT)	790	if (events & EVENT_RECONNECT)
610	{	791	{
611	slog (L_INFO, _("forced reconnect"));	792	slog (L_INFO, _("forced reconnect."));
612		793
613	reconnect_all ();	794	reconnect_all ();
614	}	795	}
615		796
616	events = 0;	797	events = 0;
617	}	798	}
618
619	w.at = TSTAMP_CANCEL;
620	}	799	}
621		800
622	void	801	void
623	vpn::shutdown_all ()	802	vpn::shutdown_all ()
624	{	803	{
…		…
634		813
635	conns.clear ();	814	conns.clear ();
636		815
637	connection_init ();	816	connection_init ();
638		817
639	for (configuration::node_vector::iterator i = conf.nodes.begin ();	818	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
640	i != conf.nodes.end (); ++i)	819	conns.push_back (new connection (this, *i));
641	{
642	connection *conn = new connection (this);
643		820
644	conn->conf = *i;	821	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
645	conns.push_back (conn);
646
647	conn->establish_connection ();	822	(*c)->establish_connection ();
648	}
649	}	823	}
650		824
651	connection *vpn::find_router ()	825	bool
		826	vpn::can_direct (conf_node src, conf_node dst) const
652	{	827	{
653	u32 prio = 1;	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	{
654	connection *router = 0;	840	connection *router = 0;
655		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	{
656	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	890	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
657	{	891	{
658	connection c = i;	892	connection o = i;
659		893
660	if (c->conf->routerprio > prio	894	if (!o->is_direct
661	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	895	&& o->si.valid ()
662	&& c->ictx && c->octx	896	&& c->si != o->si
663	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	897	&& c == find_router_for (o))
664	{
665	prio = c->conf->routerprio;
666	router = c;
667	}	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	}
668	}	903	}
669
670	return router;
671	}	904	}
672		905
		906	void
673	void vpn::send_connect_request (int id)	907	vpn::send_connect_request (connection *c)
674	{	908	{
675	connection *c = find_router ();	909	connection *r = find_router_for (c);
676		910
677	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);
678	c->send_connect_request (id);	915	r->send_connect_request (c->conf->id);
		916	}
679	else	917	else
680	// 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."),
681	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	919	c->conf->nodename);
682	if ((i)->conf->routerprio && (i)->conf != THISNODE)
683	(*i)->establish_connection ();
684	}	920	}
685		921
686	void	922	void
687	connection::dump_status ()	923	connection::dump_status ()
688	{	924	{
689	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	925	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
690	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	926	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
691	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	927	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
692	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"),
693	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	929	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
694	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
695	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
696	}	930	}
697		931
698	void	932	void
699	vpn::dump_status ()	933	vpn::dump_status ()
700	{	934	{
701	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	935	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
702		936
703	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	937	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
704	(*c)->dump_status ();	938	(*c)->dump_status ();
705		939
706	slog (L_NOTICE, _("END status dump"));	940	slog (L_NOTICE, _("END status dump"));
707	}	941	}
708		942
709	vpn::vpn (void)	943	vpn::vpn (void)
		944	{
710	: event (this, &vpn::event_cb)	945	event .set<vpn, &vpn::event_cb > (this);
711	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	946	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
712	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	947	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
713	#if ENABLE_TCP	948	#if ENABLE_TCP
714	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	949	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
715	#endif	950	#endif
716	#if ENABLE_ICMP	951	#if ENABLE_ICMP
717	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	952	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
718	#endif	953	#endif
719	, tap_ev_watcher (this, &vpn::tap_ev)	954	#if ENABLE_DNS
720	{	955	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		956	#endif
		957	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
721	}	958	}
722		959
723	vpn::~vpn ()	960	vpn::~vpn ()
724	{	961	{
725	}	962	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.19 by pcg, Thu Oct 16 02:41:21 2003 UTC vs. Revision 1.66 by root, Thu Jul 18 13:35:16 2013 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.19 by pcg, Thu Oct 16 02:41:21 2003 UTC vs.
Revision 1.66 by root, Thu Jul 18 13:35:16 2013 UTC