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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.6 by pcg, Sun Apr 6 04:17:36 2003 UTC vs.
Revision 1.71 by root, Thu Oct 6 03:25:54 2022 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	// hopefully temporary workaround for rare buffer full conditions
		65	// if it happens, usually instantly retrying or retrying ~5ms later
		66	// is good enough with current network technologies/kernels
		67
		68	static ssize_t
		69	xsendto (int fd, const void *buf, size_t len, int flags,
		70	const struct sockaddr *sa, socklen_t salen)
		71	{
		72	ssize_t res;
		73
		74	for (int retry = 0; retry <= 13; ++retry) // ~100ms
		75	{
		76	res = sendto (fd, buf, len, flags, sa, salen);
		77
		78	if (res >= 0 \|\| errno != ENOBUFS)
		79	break;
		80
		81	struct timespec ts = { 0, 1000 * retry };
		82	nanosleep (&ts, 0);
		83	}
		84
		85	return res;
		86	}
		87
		88	/////////////////////////////////////////////////////////////////////////////
		89
		90	static void inline
		91	set_tos (int fd, int &tos_prev, int tos)
		92	{
		93	#if defined(SOL_IP) && defined(IP_TOS)
		94	if (tos_prev == tos)
		95	return;
		96
		97	tos_prev = tos;
		98	setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		99	#endif
		100	}
		101
		102	void
		103	vpn::script_init_env ()
46	{	104	{
47	// the tunnel device mtu should be the physical mtu - overhead	105	// the tunnel device mtu should be the physical mtu - overhead
48	// the tricky part is rounding to the cipher key blocksize	106	// the tricky part is rounding to the cipher key blocksize
49	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	107	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
50	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	108	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
51	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	109	mtu -= mtu % BLOCK_SIZE (CIPHER); // round
52	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	110	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
53		111
54	char *env;	112	char *env;
55	asprintf (&env, "CONFBASE=%s", confbase);	113	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 ());	114	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
62	putenv (env);	115	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		116	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
63	asprintf (&env, "MTU=%d", mtu);	117	asprintf (&env, "MTU=%d", mtu); putenv (env);
64	putenv (env);	118	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
65	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	119	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
66	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
67	THISNODE->id & 0xff);
68	putenv (env);
69		120
70	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	121	conns [THISNODE->id - 1]->script_init_env ("");
		122
		123	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		124	{
		125	char ext[16];
		126	snprintf (ext, 16, "_%d", (*c)->conf->id);
		127	(*c)->script_init_env (ext);
		128	}
		129	}
		130
		131	inline const char *
		132	vpn::script_if_init ()
		133	{
		134	script_init_env ();
		135
		136	return tap->if_up ();
		137	}
		138
		139	inline const char *
		140	vpn::script_if_up ()
		141	{
		142	script_init_env ();
		143
		144	return conf.config_filename (::conf.script_if_up, "if-up");
		145	}
		146
		147	int
		148	vpn::setup_socket (u8 prot, int family, int type, int proto)
		149	{
		150	int fd = socket (family, type, proto);
		151
		152	if (fd < 0)
		153	{
		154	slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno));
		155	return fd;
		156	}
		157
		158	fcntl (fd, F_SETFL, O_NONBLOCK);
		159	fcntl (fd, F_SETFD, FD_CLOEXEC);
		160
		161	#ifdef SO_MARK
		162	if (::conf.nfmark)
		163	if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark))
		164	slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno));
		165	#endif
		166
		167	return fd;
71	}	168	}
72		169
73	int	170	int
74	vpn::setup ()	171	vpn::setup ()
75	{	172	{
		173	int success = 0;
		174
		175	ipv4_tos = -1;
76	udpv4_fd = -1;	176	ipv4_fd = -1;
77		177
78	if (THISNODE->protocols & PROT_UDPv4)	178	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
79	{	179	{
80	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	180	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
81		181
82	if (udpv4_fd < 0)	182	if (ipv4_fd < 0)
83	return -1;	183	return -1;
84		184
85	// standard daemon practise...	185	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
86	{
87	int oval = 1;
88	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
89	}
90
91	sockinfo si (THISNODE, PROT_UDPv4);
92
93	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
94	{
95	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
96	exit (1);
97	}
98
99	#ifdef IP_MTU_DISCOVER
100	// this I really consider a linux bug. I am neither connected	186	// this I really consider a linux bug. I am neither connected
101	// nor do I fragment myself. Linux still sets DF and doesn't	187	// nor do I fragment myself. Linux still sets DF and doesn't
102	// fragment for me sometimes.	188	// fragment for me sometimes.
103	{	189	{
104	int oval = IP_PMTUDISC_DONT;	190	int oval = IP_PMTUDISC_DONT;
105	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	191	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		192	}
		193	#endif
		194
		195	sockinfo si (THISNODE, PROT_IPv4);
		196
		197	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
		198	{
		199	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
		200	return -1;
106	}	201	}
107	#endif
108		202
109	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	203	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		204	++success;
110	}	205	}
		206	else
		207	THISNODE->protocols &= ~PROT_IPv4;
111		208
		209	udpv4_tos = -1;
112	ipv4_fd = -1;	210	udpv4_fd = -1;
113	if (THISNODE->protocols & PROT_IPv4)
114	{
115	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
116		211
		212	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
		213	{
		214	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		215
117	if (ipv4_fd < 0)	216	if (udpv4_fd < 0)
118	return -1;	217	return -1;
119		218
120	sockinfo si (THISNODE, PROT_IPv4);	219	// standard daemon practise...
121
122	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
123	{	220	{
124	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	221	int oval = 1;
125	exit (1);	222	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
126	}	223	}
127		224
128	#ifdef IP_MTU_DISCOVER	225	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
129	// this I really consider a linux bug. I am neither connected	226	// this I really consider a linux bug. I am neither connected
130	// nor do I fragment myself. Linux still sets DF and doesn't	227	// nor do I fragment myself. Linux still sets DF and doesn't
131	// fragment for me sometimes.	228	// fragment for me sometimes.
132	{	229	{
133	int oval = IP_PMTUDISC_DONT;	230	int oval = IP_PMTUDISC_DONT;
		231	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		232	}
		233	#endif
		234
		235	sockinfo si (THISNODE, PROT_UDPv4);
		236
		237	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
		238	{
		239	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		240	return -1;
		241	}
		242
		243	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		244	++success;
		245	}
		246	else
		247	THISNODE->protocols &= ~PROT_UDPv4;
		248
		249	icmpv4_tos = -1;
		250	icmpv4_fd = -1;
		251
		252	#if ENABLE_ICMP
		253	if (THISNODE->protocols & PROT_ICMPv4)
		254	{
		255	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
		256
		257	if (icmpv4_fd < 0)
		258	return -1;
		259
		260	// no clue where trhis is actually defined
		261	#if !defined(ICMP_FILTER) && defined(__linux)
		262	#define ICMP_FILTER 1
		263	#endif
		264
		265	#ifdef ICMP_FILTER
		266	{
		267	uint32_t oval;
		268	oval = 0;
		269	if (::conf.icmp_type < 32)
		270	oval \|= 1 << ::conf.icmp_type;
		271	oval = ~oval;
		272
		273	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
		274	}
		275	#endif
		276
		277	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		278	// this I really consider a linux bug. I am neither connected
		279	// nor do I fragment myself. Linux still sets DF and doesn't
		280	// fragment for me sometimes.
		281	{
		282	int oval = IP_PMTUDISC_DONT;
134	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	283	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		284	}
		285	#endif
		286
		287	sockinfo si (THISNODE, PROT_ICMPv4);
		288
		289	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
		290	{
		291	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		292	return -1;
135	}	293	}
136	#endif
137		294
138	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	295	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		296	++success;
139	}	297	}
		298	#endif
		299
		300	tcpv4_fd = -1;
140		301
141	#if ENABLE_TCP	302	#if ENABLE_TCP
142	if (THISNODE->protocols & PROT_TCPv4)	303	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
143	{	304	{
144	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	305	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
145		306
146	if (tcpv4_fd < 0)	307	if (tcpv4_fd < 0)
147	return -1;	308	return -1;
148		309
149	// standard daemon practise...	310	// standard daemon practise...
154		315
155	sockinfo si (THISNODE, PROT_TCPv4);	316	sockinfo si (THISNODE, PROT_TCPv4);
156		317
157	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	318	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
158	{	319	{
159	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	320	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
160	exit (1);	321	return -1;
161	}	322	}
162		323
163	if (listen (tcpv4_fd, 5))	324	if (listen (tcpv4_fd, 5))
164	{	325	{
165	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	326	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
166	exit (1);	327	return -1;
		328	}
		329
		330	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		331	++success;
		332	}
		333	else
		334	THISNODE->protocols &= ~PROT_TCPv4;
		335	#endif
		336
		337	dnsv4_tos = -1;
		338	dnsv4_fd = -1;
		339
		340	#if ENABLE_DNS
		341	if (THISNODE->protocols & PROT_DNSv4)
		342	{
		343	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		344
		345	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		346
		347	if (dnsv4_fd < 0)
		348	return -1;
		349
		350	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		351	// this I really consider a linux bug. I am neither connected
		352	// nor do I fragment myself. Linux still sets DF and doesn't
		353	// fragment for me sometimes.
		354	{
		355	int oval = IP_PMTUDISC_DONT;
		356	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
167	}	357	}
168
169	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
170	}
171	#endif	358	# endif
		359
		360	// standard daemon practise...
		361	{
		362	int oval = 1;
		363	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		364	}
		365
		366	sockinfo si (THISNODE->dns_hostname,
		367	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		368	PROT_DNSv4);
		369
		370	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		371	{
		372	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		373	return -1;
		374	}
		375
		376	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		377	++success;
		378	}
		379	#endif
		380
		381	/////////////////////////////////////////////////////////////////////////////
		382
		383	if (!success)
		384	{
		385	slog (L_ERR, _("no protocols enabled."));
		386	return -1;
		387	}
		388
		389	reconnect_all ();
		390
		391	/////////////////////////////////////////////////////////////////////////////
172		392
173	tap = new tap_device ();	393	tap = new tap_device ();
174	if (!tap) //D this, of course, never catches	394	if (!tap) //D this, of course, never catches
175	{	395	{
176	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	396	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
177	exit (1);	397	return -1;
178	}	398	}
179		399
180	run_script (run_script_cb (this, &vpn::script_if_up), true);	400	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
181		401
		402	run_script_cb cb;
		403	cb.set<vpn, &vpn::script_if_init> (this);
		404
		405	if (tap->if_up () &&
		406	!run_script (cb, true))
		407	{
		408	slog (L_ERR, _("interface initialization command '%s' failed."),
		409	tap->if_up ());
		410	return -1;
		411	}
		412
		413	cb.set<vpn, &vpn::script_if_up> (this);
		414	if (!run_script (cb, true))
		415	{
		416	slog (L_ERR, _("if-up command execution failed."));
		417	return -1;
		418	}
		419
182	tap_ev_watcher.start (tap->fd, POLLIN);	420	tap_ev_watcher.start (tap->fd, EV_READ);
183
184	reconnect_all ();
185		421
186	return 0;	422	return 0;
187	}	423	}
188		424
189	// send a vpn packet out to other hosts	425	bool
		426	vpn::drop_privileges ()
		427	{
		428	if (::conf.change_root)
		429	{
		430	if (!strcmp (::conf.change_root, "/"))
		431	{
		432	char dir [L_tmpnam];
		433	if (!tmpnam (dir))
		434	{
		435	slog (L_CRIT, _("unable to create anonymous root path."));
		436	return false;
		437	}
		438
		439	if (mkdir (dir, 0700))
		440	{
		441	slog (L_CRIT, _("unable to create anonymous root directory."));
		442	return false;
		443	}
		444
		445	if (chdir (dir))
		446	{
		447	slog (L_CRIT, _("unable to change to anonymous root directory."));
		448	return false;
		449	}
		450
		451	if (rmdir (dir))
		452	slog (L_ERR, _("unable to remove anonymous root directory, continuing."));
		453	}
		454	else
		455	{
		456	if (chdir (::conf.change_root))
		457	{
		458	slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root);
		459	return false;
		460	}
		461	}
		462
		463	if (chroot ("."))
		464	{
		465	slog (L_CRIT, _("unable to set new root directory."));
		466	return false;
		467	}
		468
		469	if (chdir ("/"))
		470	{
		471	slog (L_CRIT, _("unable to set cwd to new root directory."));
		472	return false;
		473	}
		474	}
		475
		476	if (::conf.change_gid)
		477	if (setgid (::conf.change_gid))
		478	{
		479	slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid);
		480	return false;
		481	}
		482
		483	if (::conf.change_uid)
		484	if (setuid (::conf.change_uid))
		485	{
		486	slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid);
		487	return false;
		488	}
		489
		490	return true;
		491	}
		492
		493	bool
		494	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		495	{
		496	set_tos (ipv4_fd, ipv4_tos, tos);
		497	xsendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		498
		499	return true;
		500	}
		501
		502	static u16
		503	ipv4_checksum (u16 *data, unsigned int len)
		504	{
		505	// use 32 bit accumulator and fold back carry bits at the end
		506	u32 sum = 0;
		507
		508	while (len > 1)
		509	{
		510	sum += *data++;
		511	len -= 2;
		512	}
		513
		514	// odd byte left?
		515	if (len)
		516	sum += (u8 )data;
		517
		518	// add back carry bits
		519	sum = (sum >> 16) + (sum & 0xffff); // lo += hi
		520	sum += (sum >> 16); // carry
		521
		522	return ~sum;
		523	}
		524
		525	#if ENABLE_ICMP
		526	bool
		527	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		528	{
		529	pkt->unshift_hdr (4);
		530
		531	icmp_header hdr = (icmp_header )&((*pkt)[0]);
		532	hdr->type = ::conf.icmp_type;
		533	hdr->code = 255;
		534	hdr->checksum = 0;
		535	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
		536
		537	set_tos (icmpv4_fd, icmpv4_tos, tos);
		538	xsendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		539
		540	return true;
		541	}
		542	#endif
		543
		544	bool
		545	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		546	{
		547	set_tos (udpv4_fd, udpv4_tos, tos);
		548	xsendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		549
		550	return true;
		551	}
		552
190	void	553	void
191	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	554	vpn::inject_data_packet (tap_packet *pkt, int dst)
192	{	555	{
193	switch (si.prot)	556	if (dst)
194	{
195	case PROT_IPv4:
196	send_ipv4_packet (pkt, si, tos);
197	break;
198
199	case PROT_UDPv4:
200	send_udpv4_packet (pkt, si, tos);
201	break;
202
203	#if ENABLE_TCP
204	case PROT_TCPv4:
205	send_tcpv4_packet (pkt, si, tos);
206	break;
207	#endif
208
209	default:
210	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
211	abort ();
212	}	557	{
213	}	558	// unicast
214		559	if (dst != THISNODE->id)
215	void	560	conns[dst - 1]->inject_data_packet (pkt);
216	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	561	}
217	{	562	else
218	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	563	{
219	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	564	// broadcast, this is ugly, but due to the security policy
220	}	565	// we have to connect to all hosts...
221		566	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
222	void	567	if ((*c)->conf != THISNODE)
223	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	568	(*c)->inject_data_packet (pkt);
224	{	569	}
225	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
226	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
227	}	570	}
228		571
229	void	572	void
230	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	573	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
231	{	574	{
232	unsigned int src = pkt->src ();	575	unsigned int src = pkt->src ();
233	unsigned int dst = pkt->dst ();	576	unsigned int dst = pkt->dst ();
234		577
235	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	578	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
236	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	579	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
237		580
238	if (src == 0 \|\| src > conns.size ()	581	if (src == 0 \|\| src > conns.size ()
239	\|\| dst > conns.size ()	582	\|\| dst > conns.size ()
240	\|\| pkt->typ () >= vpn_packet::PT_MAX)	583	\|\| pkt->typ () >= vpn_packet::PT_MAX)
241	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	584	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
242	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
243	else if (dst > conns.size ())
244	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
245	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	585	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
246	else	586	else
247	{	587	{
248	connection *c = conns[src - 1];	588	connection *c = conns[src - 1];
249		589
250	if (dst == 0 && !THISNODE->routerprio)	590	if (dst == 0)
251	slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),	591	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
252	c->conf->nodename, (const char *)rsi);	592	c->conf->nodename, (const char *)rsi);
253	else if (dst != 0 && dst != THISNODE->id)	593	else if (dst != THISNODE->id)
254	{	594	{
255	if (THISNODE->routerprio)	595	if (THISNODE->routerprio)
256	// the tos setting gets lost here. who cares.	596	// the tos setting gets lost here. who cares.
257	conns[dst - 1]->inject_vpn_packet (pkt);	597	conns[dst - 1]->inject_vpn_packet (pkt);
258	else	598	else
259	slog (L_WARN,	599	slog (L_WARN,
260	_("%s(%s): forwarding request (=> %s), but we are no router"),	600	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
261	c->conf->nodename, (const char *)rsi,	601	c->conf->nodename, (const char *)rsi,
262	conns[dst - 1]->conf->nodename);	602	conns[dst - 1]->conf->nodename);
263	}	603	}
264	else	604	else
265	c->recv_vpn_packet (pkt, rsi);	605	c->recv_vpn_packet (pkt, rsi);
266	}	606	}
267	}	607	}
268		608
269	void	609	bool
270	vpn::udpv4_ev (io_watcher &w, short revents)	610	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
271	{	611	{
272	if (revents & (POLLIN \| POLLERR))	612	switch (si.prot)
		613	{
		614	case PROT_IPv4:
		615	return send_ipv4_packet (pkt, si, tos);
		616
		617	case PROT_UDPv4:
		618	return send_udpv4_packet (pkt, si, tos);
		619
		620	#if ENABLE_TCP
		621	case PROT_TCPv4:
		622	return send_tcpv4_packet (pkt, si, tos);
		623	#endif
		624	#if ENABLE_ICMP
		625	case PROT_ICMPv4:
		626	return send_icmpv4_packet (pkt, si, tos);
		627	#endif
		628	#if ENABLE_DNS
		629	case PROT_DNSv4:
		630	return send_dnsv4_packet (pkt, si, tos);
		631	#endif
		632	default:
		633	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		634	}
		635
		636	return false;
		637	}
		638
		639	inline void
		640	vpn::ipv4_ev (ev::io &w, int revents)
		641	{
		642	if (revents & EV_READ)
273	{	643	{
274	vpn_packet *pkt = new vpn_packet;	644	vpn_packet *pkt = new vpn_packet;
275	struct sockaddr_in sa;	645	struct sockaddr_in sa;
276	socklen_t sa_len = sizeof (sa);	646	socklen_t sa_len = sizeof (sa);
277	int len;	647	int len;
278		648
279	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	649	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
280		650
281	sockinfo si(sa, PROT_UDPv4);	651	sockinfo si(sa, PROT_IPv4);
282		652
283	if (len > 0)	653	if (len > 0)
284	{	654	{
285	pkt->len = len;	655	pkt->len = len;
286		656
		657	// raw sockets deliver the ipv4 header, but don't expect it on sends
		658	pkt->skip_hdr (pkt->ipv4_hdr_len ());
		659
287	recv_vpn_packet (pkt, si);	660	recv_vpn_packet (pkt, si);
288	}	661	}
289	else	662	else
290	{	663	{
291	// probably ECONNRESET or somesuch	664	// probably ECONNRESET or somesuch
292	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	665	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
293	}	666	}
294		667
295	delete pkt;	668	delete pkt;
296	}	669	}
297	else if (revents & POLLHUP)
298	{
299	// this cannot ;) happen on udp sockets
300	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
301	exit (1);
302	}
303	else	670	else
304	{	671	{
305	slog (L_ERR,	672	slog (L_ERR,
306	_("FATAL: unknown revents %08x in socket, terminating\n"),	673	_("FATAL: unknown revents %08x in socket, exiting.\n"),
307	revents);	674	revents);
308	exit (1);	675	exit (EXIT_FAILURE);
309	}	676	}
310	}	677	}
311		678
312	void	679	#if ENABLE_ICMP
		680	inline void
313	vpn::ipv4_ev (io_watcher &w, short revents)	681	vpn::icmpv4_ev (ev::io &w, int revents)
314	{	682	{
315	if (revents & (POLLIN \| POLLERR))	683	if (revents & EV_READ)
316	{	684	{
317	vpn_packet *pkt = new vpn_packet;	685	vpn_packet *pkt = new vpn_packet;
318	struct sockaddr_in sa;	686	struct sockaddr_in sa;
319	socklen_t sa_len = sizeof (sa);	687	socklen_t sa_len = sizeof (sa);
320	int len;	688	int len;
321		689
322	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	690	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
323		691
324	sockinfo si(sa, PROT_IPv4);	692	sockinfo si(sa, PROT_ICMPv4);
325		693
326	if (len > 0)	694	if (len > 0)
327	{	695	{
328	pkt->len = len;	696	pkt->len = len;
329		697
		698	icmp_header hdr = (icmp_header )&((*pkt)[IP_OVERHEAD]);
		699
		700	if (hdr->type == ::conf.icmp_type
		701	&& hdr->code == 255)
		702	{
330	// raw sockets deliver the ipv4, but don't expect it on sends	703	// raw sockets deliver the ipv4, but don't expect it on sends
331	// this is slow, but...	704	// this is slow, but...
332	pkt->skip_hdr (IP_OVERHEAD);	705	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
		706
		707	recv_vpn_packet (pkt, si);
		708	}
		709	}
		710	else
		711	{
		712	// probably ECONNRESET or somesuch
		713	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
		714	}
		715
		716	delete pkt;
		717	}
		718	else
		719	{
		720	slog (L_ERR,
		721	_("FATAL: unknown revents %08x in socket, exiting.\n"),
		722	revents);
		723	exit (EXIT_FAILURE);
		724	}
		725	}
		726	#endif
		727
		728	inline void
		729	vpn::udpv4_ev (ev::io &w, int revents)
		730	{
		731	if (revents & EV_READ)
		732	{
		733	vpn_packet *pkt = new vpn_packet;
		734	struct sockaddr_in sa;
		735	socklen_t sa_len = sizeof (sa);
		736	int len;
		737
		738	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
		739
		740	sockinfo si(sa, PROT_UDPv4);
		741
		742	if (len > 0)
		743	{
		744	pkt->len = len;
333		745
334	recv_vpn_packet (pkt, si);	746	recv_vpn_packet (pkt, si);
335	}	747	}
336	else	748	else
337	{	749	{
338	// probably ECONNRESET or somesuch	750	// probably ECONNRESET or somesuch
339	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	751	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
340	}	752	}
341		753
342	delete pkt;	754	delete pkt;
343	}	755	}
344	else if (revents & POLLHUP)
345	{
346	// this cannot ;) happen on udp sockets
347	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
348	exit (1);
349	}
350	else	756	else
351	{	757	{
352	slog (L_ERR,	758	slog (L_ERR,
353	_("FATAL: unknown revents %08x in socket, terminating\n"),	759	_("FATAL: unknown revents %08x in socket, exiting.\n"),
354	revents);	760	revents);
355	exit (1);	761	exit (EXIT_FAILURE);
356	}	762	}
357	}	763	}
358		764
359	void	765	inline void
360	vpn::tap_ev (io_watcher &w, short revents)	766	vpn::tap_ev (ev::io &w, int revents)
361	{	767	{
362	if (revents & POLLIN)	768	if (revents & EV_READ)
363	{	769	{
364	/* process data */	770	/* process data */
365	tap_packet *pkt;	771	tap_packet *pkt;
366		772
367	pkt = tap->recv ();	773	pkt = tap->recv ();
368		774
		775	if (!pkt)
		776	return;
		777
		778	if (pkt->len > 14)
		779	{
369	int dst = mac2id (pkt->dst);	780	int dst = mac2id (pkt->dst);
370	int src = mac2id (pkt->src);	781	int src = mac2id (pkt->src);
371		782
372	if (src != THISNODE->id)	783	if (src != THISNODE->id)
373	{
374	slog (L_ERR, _("FATAL: tap packet not originating on current node received, terminating."));
375	exit (1);
376	}
377
378	if (dst == THISNODE->id)
379	{
380	slog (L_ERR, _("FATAL: tap packet destined for current node received, terminating."));
381	exit (1);
382	}
383
384	if (dst > conns.size ())
385	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
386	else
387	{
388	if (dst)
389	{	784	{
390	// unicast	785	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
391	if (dst != THISNODE->id)	786	exit (EXIT_FAILURE);
392	conns[dst - 1]->inject_data_packet (pkt);
393	}	787	}
		788
		789	if (dst == THISNODE->id)
		790	{
		791	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		792	exit (EXIT_FAILURE);
		793	}
		794
		795	if (dst > conns.size ())
		796	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
394	else	797	else
395	{
396	// broadcast, first check router, then self, then english
397	connection *router = find_router ();
398
399	if (router)
400	router->inject_data_packet (pkt, true);	798	inject_data_packet (pkt, dst);
401	else
402	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
403	if ((*c)->conf != THISNODE)
404	(*c)->inject_data_packet (pkt);
405	}
406	}	799	}
407		800
408	delete pkt;	801	delete pkt;
409	}
410	else if (revents & (POLLHUP \| POLLERR))
411	{
412	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
413	exit (1);
414	}	802	}
415	else	803	else
416	abort ();	804	abort ();
417	}	805	}
418		806
419	void	807	inline void
420	vpn::event_cb (time_watcher &w)	808	vpn::event_cb (ev::timer &w, int)
421	{	809	{
422	if (events)	810	if (events)
423	{	811	{
424	if (events & EVENT_SHUTDOWN)	812	if (events & EVENT_SHUTDOWN)
425	{	813	{
426	slog (L_INFO, _("preparing shutdown..."));	814	slog (L_INFO, _("preparing shutdown..."));
427		815
428	shutdown_all ();	816	shutdown_all ();
429
430	remove_pid (pidfilename);	817	remove_pid (conf.pidfilename);
431
432	slog (L_INFO, _("terminating"));	818	slog (L_INFO, _("exiting."));
433		819	exit (EXIT_SUCCESS);
434	exit (0);
435	}	820	}
436		821
437	if (events & EVENT_RECONNECT)	822	if (events & EVENT_RECONNECT)
438	{	823	{
439	slog (L_INFO, _("forced reconnect"));	824	slog (L_INFO, _("forced reconnect."));
440		825
441	reconnect_all ();	826	reconnect_all ();
442	}	827	}
443		828
444	events = 0;	829	events = 0;
445	}	830	}
446
447	w.at = TSTAMP_CANCEL;
448	}	831	}
449		832
450	void	833	void
451	vpn::shutdown_all ()	834	vpn::shutdown_all ()
452	{	835	{
…		…
462		845
463	conns.clear ();	846	conns.clear ();
464		847
465	connection_init ();	848	connection_init ();
466		849
467	for (configuration::node_vector::iterator i = conf.nodes.begin ();	850	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
468	i != conf.nodes.end (); ++i)	851	conns.push_back (new connection (this, *i));
469	{
470	connection *conn = new connection (this);
471		852
472	conn->conf = *i;	853	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
473	conns.push_back (conn);
474
475	conn->establish_connection ();	854	(*c)->establish_connection ();
476	}
477	}	855	}
478		856
479	connection *vpn::find_router ()	857	bool
		858	vpn::can_direct (conf_node src, conf_node dst) const
480	{	859	{
481	u32 prio = 0;	860	return src != dst
		861	&& src->may_direct (dst)
		862	&& dst->may_direct (src)
		863	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		864	\|\| (src->protocols & dst->connectable_protocols ()));
		865	}
		866
		867	// only works for indirect and routed connections: find a router
		868	// from THISNODE to dst
		869	connection *
		870	vpn::find_router_for (const connection *dst)
		871	{
482	connection *router = 0;	872	connection *router = 0;
483		873
		874	// first try to find a router with a direct connection, route there
		875	// regardless of any other considerations.
		876	{
		877	u32 prio = 1;
		878
		879	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		880	{
		881	connection c = i;
		882
		883	if (c->conf->routerprio > prio
		884	&& c->conf != THISNODE
		885	&& can_direct (c->conf, dst->conf)
		886	&& c->ictx && c->octx)
		887	{
		888	prio = c->conf->routerprio;
		889	router = c;
		890	}
		891	}
		892	}
		893
		894	if (router)
		895	return router;
		896
		897	// second try find the router with the highest priority, higher than ours
		898	{
		899	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		900
		901	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		902	{
		903	connection c = i;
		904
		905	if (c->conf->routerprio > prio
		906	&& c != dst
		907	&& c->conf != THISNODE
		908	&& c->ictx && c->octx)
		909	{
		910	prio = c->conf->routerprio;
		911	router = c;
		912	}
		913	}
		914	}
		915
		916	return router;
		917	}
		918
		919	void
		920	vpn::connection_established (connection *c)
		921	{
484	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	922	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
485	{	923	{
486	connection c = i;	924	connection o = i;
487		925
488	if (c->conf->routerprio > prio	926	if (o->si.valid ()
489	&& c->connectmode == conf_node::C_ALWAYS	927	&& c->si != o->si
490	&& c->conf != THISNODE	928	&& c == find_router_for (o)
491	&& c->ictx && c->octx)	929	&& !can_direct (THISNODE, o->conf))
492	{
493	prio = c->conf->routerprio;
494	router = c;
495	}	930	{
		931	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		932	o->conf->nodename, c->conf->nodename);
		933	o->rekey ();
		934	}
496	}	935	}
497
498	return router;
499	}	936	}
500		937
501	void vpn::connect_request (int id)	938	void
		939	vpn::send_connect_request (connection *c)
502	{	940	{
503	connection *c = find_router ();	941	connection *r = find_router_for (c);
504		942
505	if (c)	943	if (r)
		944	{
		945	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		946	c->conf->nodename, r->conf->nodename);
506	c->connect_request (id);	947	r->send_connect_request (c->conf->id);
507	//else // does not work, because all others must connect to the same router	948	}
508	// // no router found, aggressively connect to all routers	949	else
509	// for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	950	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
510	// if ((*i)->conf->routerprio)	951	c->conf->nodename);
511	// (*i)->establish_connection ();
512	}	952	}
513		953
514	void	954	void
515	connection::dump_status ()	955	connection::dump_status ()
516	{	956	{
517	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	957	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
518	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	958	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
519	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	959	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
520	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	960	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
521	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	961	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
522	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
523	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
524	}	962	}
525		963
526	void	964	void
527	vpn::dump_status ()	965	vpn::dump_status ()
528	{	966	{
529	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	967	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
530		968
531	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	969	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
532	(*c)->dump_status ();	970	(*c)->dump_status ();
533		971
534	slog (L_NOTICE, _("END status dump"));	972	slog (L_NOTICE, _("END status dump"));
535	}	973	}
536		974
537	vpn::vpn (void)	975	vpn::vpn (void)
538	: event(this, &vpn::event_cb)	976	{
		977	event .set<vpn, &vpn::event_cb > (this);
539	, udpv4_ev_watcher(this, &vpn::udpv4_ev)	978	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
540	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	979	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
541	, tap_ev_watcher (this, &vpn::tap_ev)
542	#if ENABLE_TCP	980	#if ENABLE_TCP
543	, tcpv4_ev_watcher(this, &vpn::tcpv4_ev)	981	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
544	#endif	982	#endif
545	{	983	#if ENABLE_ICMP
		984	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
		985	#endif
		986	#if ENABLE_DNS
		987	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		988	#endif
		989	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
546	}	990	}
547		991
548	vpn::~vpn ()	992	vpn::~vpn ()
549	{	993	{
550	}	994	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.6 by pcg, Sun Apr 6 04:17:36 2003 UTC vs. Revision 1.71 by root, Thu Oct 6 03:25:54 2022 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.6 by pcg, Sun Apr 6 04:17:36 2003 UTC vs.
Revision 1.71 by root, Thu Oct 6 03:25:54 2022 UTC