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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs.
Revision 1.70 by root, Thu Oct 6 03:03:09 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 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
45	vpn network; // THE vpn (bad design...)	60	vpn network; // THE vpn (bad design...)
46		61
47	/////////////////////////////////////////////////////////////////////////////	62	/////////////////////////////////////////////////////////////////////////////
48		63
49	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 ()
50	{	104	{
51	// the tunnel device mtu should be the physical mtu - overhead	105	// the tunnel device mtu should be the physical mtu - overhead
52	// the tricky part is rounding to the cipher key blocksize	106	// the tricky part is rounding to the cipher key blocksize
53	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	107	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
54	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	108	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
55	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	109	mtu -= mtu % BLOCK_SIZE (CIPHER); // round
56	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	110	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
57		111
58	char *env;	112	char *env;
59	asprintf (&env, "CONFBASE=%s", confbase);	113	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
60	putenv (env);
61	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
62	putenv (env);
63	asprintf (&env, "NODEID=%d", THISNODE->id);
64	putenv (env);
65	asprintf (&env, "IFNAME=%s", tap->interface ());	114	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
66	putenv (env);	115	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		116	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
67	asprintf (&env, "MTU=%d", mtu);	117	asprintf (&env, "MTU=%d", mtu); putenv (env);
68	putenv (env);	118	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
69	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	119	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
70	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
71	THISNODE->id & 0xff);
72	putenv (env);
73		120
74	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;
75	}	168	}
76		169
77	int	170	int
78	vpn::setup ()	171	vpn::setup ()
79	{	172	{
		173	int success = 0;
		174
		175	ipv4_tos = -1;
80	ipv4_fd = -1;	176	ipv4_fd = -1;
81		177
82	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	178	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
83	{	179	{
84	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	180	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
85		181
86	if (ipv4_fd < 0)	182	if (ipv4_fd < 0)
87	return -1;	183	return -1;
88
89	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
90		184
91	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	185	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
92	// this I really consider a linux bug. I am neither connected	186	// this I really consider a linux bug. I am neither connected
93	// 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
94	// fragment for me sometimes.	188	// fragment for me sometimes.
…		…
100		194
101	sockinfo si (THISNODE, PROT_IPv4);	195	sockinfo si (THISNODE, PROT_IPv4);
102		196
103	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	197	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
104	{	198	{
105	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	199	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
106	exit (1);	200	return -1;
107	}	201	}
108		202
109	ipv4_ev_watcher.start (ipv4_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	udpv4_fd = -1;	210	udpv4_fd = -1;
113		211
114	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	212	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
115	{	213	{
116	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	214	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
117		215
118	if (udpv4_fd < 0)	216	if (udpv4_fd < 0)
119	return -1;	217	return -1;
120
121	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
122		218
123	// standard daemon practise...	219	// standard daemon practise...
124	{	220	{
125	int oval = 1;	221	int oval = 1;
126	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	222	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
138		234
139	sockinfo si (THISNODE, PROT_UDPv4);	235	sockinfo si (THISNODE, PROT_UDPv4);
140		236
141	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	237	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
142	{	238	{
143	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	239	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
144	exit (1);	240	return -1;
145	}	241	}
146		242
147	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	243	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		244	++success;
148	}	245	}
		246	else
		247	THISNODE->protocols &= ~PROT_UDPv4;
149		248
		249	icmpv4_tos = -1;
150	icmpv4_fd = -1;	250	icmpv4_fd = -1;
151		251
152	#if ENABLE_ICMP	252	#if ENABLE_ICMP
153	if (THISNODE->protocols & PROT_ICMPv4)	253	if (THISNODE->protocols & PROT_ICMPv4)
154	{	254	{
155	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	255	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
156		256
157	if (icmpv4_fd < 0)	257	if (icmpv4_fd < 0)
158	return -1;	258	return -1;
159		259
160	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
161
162	#ifdef ICMP_FILTER	260	#ifdef ICMP_FILTER
163	{	261	{
164	icmp_filter oval;	262	icmp_filter oval;
165	oval.data = 0xffffffff;	263	oval.data = 0;
166	if (::conf.icmp_type < 32)	264	if (::conf.icmp_type < 32)
167	oval.data &= ~(1 << ::conf.icmp_type);	265	oval.data \|= 1 << ::conf.icmp_type;
		266	oval.data = ~oval.data;
168		267
169	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);	268	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
170	}	269	}
171	#endif	270	#endif
172		271
…		…
174	// this I really consider a linux bug. I am neither connected	273	// this I really consider a linux bug. I am neither connected
175	// nor do I fragment myself. Linux still sets DF and doesn't	274	// nor do I fragment myself. Linux still sets DF and doesn't
176	// fragment for me sometimes.	275	// fragment for me sometimes.
177	{	276	{
178	int oval = IP_PMTUDISC_DONT;	277	int oval = IP_PMTUDISC_DONT;
179	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	278	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
180	}	279	}
181	#endif	280	#endif
182		281
183	sockinfo si (THISNODE, PROT_ICMPv4);	282	sockinfo si (THISNODE, PROT_ICMPv4);
184		283
185	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	284	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
186	{	285	{
187	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	286	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
188	exit (1);	287	return -1;
189	}	288	}
190		289
191	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	290	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		291	++success;
192	}	292	}
193	#endif	293	#endif
194		294
195	tcpv4_fd = -1;	295	tcpv4_fd = -1;
196		296
197	#if ENABLE_TCP	297	#if ENABLE_TCP
198	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	298	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
199	{	299	{
200	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	300	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
201		301
202	if (tcpv4_fd < 0)	302	if (tcpv4_fd < 0)
203	return -1;	303	return -1;
204		304
205	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
206
207	// standard daemon practise...	305	// standard daemon practise...
208	{	306	{
209	int oval = 1;	307	int oval = 1;
210	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	308	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
211	}	309	}
212		310
213	sockinfo si (THISNODE, PROT_TCPv4);	311	sockinfo si (THISNODE, PROT_TCPv4);
214		312
215	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	313	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
216	{	314	{
217	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	315	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
218	exit (1);	316	return -1;
219	}	317	}
220		318
221	if (listen (tcpv4_fd, 5))	319	if (listen (tcpv4_fd, 5))
222	{	320	{
223	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	321	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
224	exit (1);	322	return -1;
		323	}
		324
		325	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		326	++success;
		327	}
		328	else
		329	THISNODE->protocols &= ~PROT_TCPv4;
		330	#endif
		331
		332	dnsv4_tos = -1;
		333	dnsv4_fd = -1;
		334
		335	#if ENABLE_DNS
		336	if (THISNODE->protocols & PROT_DNSv4)
		337	{
		338	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		339
		340	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		341
		342	if (dnsv4_fd < 0)
		343	return -1;
		344
		345	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		346	// this I really consider a linux bug. I am neither connected
		347	// nor do I fragment myself. Linux still sets DF and doesn't
		348	// fragment for me sometimes.
		349	{
		350	int oval = IP_PMTUDISC_DONT;
		351	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
225	}	352	}
226
227	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
228	}
229	#endif	353	# endif
		354
		355	// standard daemon practise...
		356	{
		357	int oval = 1;
		358	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		359	}
		360
		361	sockinfo si (THISNODE->dns_hostname,
		362	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		363	PROT_DNSv4);
		364
		365	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		366	{
		367	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		368	return -1;
		369	}
		370
		371	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		372	++success;
		373	}
		374	#endif
		375
		376	/////////////////////////////////////////////////////////////////////////////
		377
		378	if (!success)
		379	{
		380	slog (L_ERR, _("no protocols enabled."));
		381	return -1;
		382	}
		383
		384	reconnect_all ();
		385
		386	/////////////////////////////////////////////////////////////////////////////
230		387
231	tap = new tap_device ();	388	tap = new tap_device ();
232	if (!tap) //D this, of course, never catches	389	if (!tap) //D this, of course, never catches
233	{	390	{
234	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	391	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
235	exit (1);	392	return -1;
236	}	393	}
237		394
238	run_script (run_script_cb (this, &vpn::script_if_up), true);	395	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
239		396
		397	run_script_cb cb;
		398	cb.set<vpn, &vpn::script_if_init> (this);
		399
		400	if (tap->if_up () &&
		401	!run_script (cb, true))
		402	{
		403	slog (L_ERR, _("interface initialization command '%s' failed."),
		404	tap->if_up ());
		405	return -1;
		406	}
		407
		408	cb.set<vpn, &vpn::script_if_up> (this);
		409	if (!run_script (cb, true))
		410	{
		411	slog (L_ERR, _("if-up command execution failed."));
		412	return -1;
		413	}
		414
240	tap_ev_watcher.start (tap->fd, POLLIN);	415	tap_ev_watcher.start (tap->fd, EV_READ);
241
242	reconnect_all ();
243		416
244	return 0;	417	return 0;
245	}	418	}
246		419
247	// send a vpn packet out to other hosts
248	bool	420	bool
249	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	421	vpn::drop_privileges ()
250	{	422	{
251	switch (si.prot)	423	if (::conf.change_root)
		424	{
		425	if (!strcmp (::conf.change_root, "/"))
		426	{
		427	char dir [L_tmpnam];
		428	if (!tmpnam (dir))
		429	{
		430	slog (L_CRIT, _("unable to create anonymous root path."));
		431	return false;
		432	}
		433
		434	if (mkdir (dir, 0700))
		435	{
		436	slog (L_CRIT, _("unable to create anonymous root directory."));
		437	return false;
		438	}
		439
		440	if (chdir (dir))
		441	{
		442	slog (L_CRIT, _("unable to change to anonymous root directory."));
		443	return false;
		444	}
		445
		446	if (rmdir (dir))
		447	slog (L_ERR, _("unable to remove anonymous root directory, continuing."));
		448	}
		449	else
		450	{
		451	if (chdir (::conf.change_root))
		452	{
		453	slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root);
		454	return false;
		455	}
		456	}
		457
		458	if (chroot ("."))
		459	{
		460	slog (L_CRIT, _("unable to set new root directory."));
		461	return false;
		462	}
		463
		464	if (chdir ("/"))
		465	{
		466	slog (L_CRIT, _("unable to set cwd to new root directory."));
		467	return false;
		468	}
		469	}
		470
		471	if (::conf.change_gid)
		472	if (setgid (::conf.change_gid))
252	{	473	{
253	case PROT_IPv4:	474	slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid);
254	return send_ipv4_packet (pkt, si, tos);
255
256	case PROT_UDPv4:
257	return send_udpv4_packet (pkt, si, tos);
258
259	#if ENABLE_TCP
260	case PROT_TCPv4:
261	return send_tcpv4_packet (pkt, si, tos);
262	#endif
263
264	#if ENABLE_ICMP
265	case PROT_ICMPv4:
266	return send_icmpv4_packet (pkt, si, tos);
267	#endif
268
269	default:
270	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
271	return false;	475	return false;
272	}	476	}
		477
		478	if (::conf.change_uid)
		479	if (setuid (::conf.change_uid))
		480	{
		481	slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid);
		482	return false;
		483	}
		484
		485	return true;
273	}	486	}
274		487
275	bool	488	bool
276	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	489	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
277	{	490	{
278	#if defined(SOL_IP) && defined(IP_TOS)	491	set_tos (ipv4_fd, ipv4_tos, tos);
279	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
280	#endif
281	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	492	xsendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
282		493
283	return true;	494	return true;
284	}	495	}
285		496
286	static u16	497	static u16
…		…
308		519
309	#if ENABLE_ICMP	520	#if ENABLE_ICMP
310	bool	521	bool
311	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	522	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
312	{	523	{
313	#if defined(SOL_IP) && defined(IP_TOS)
314	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
315	#endif
316
317	pkt->unshift_hdr (4);	524	pkt->unshift_hdr (4);
318		525
319	icmp_header hdr = (icmp_header )&((*pkt)[0]);	526	icmp_header hdr = (icmp_header )&((*pkt)[0]);
320	hdr->type = ::conf.icmp_type;	527	hdr->type = ::conf.icmp_type;
321	hdr->code = 255;	528	hdr->code = 255;
322	hdr->checksum = 0;	529	hdr->checksum = 0;
323	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	530	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
324		531
		532	set_tos (icmpv4_fd, icmpv4_tos, tos);
325	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	533	xsendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
326		534
327	return true;	535	return true;
328	}	536	}
329	#endif	537	#endif
330		538
331	bool	539	bool
332	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	540	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
333	{	541	{
334	#if defined(SOL_IP) && defined(IP_TOS)	542	set_tos (udpv4_fd, udpv4_tos, tos);
335	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
336	#endif
337	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	543	xsendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
338		544
339	return true;	545	return true;
340	}	546	}
341		547
342	void	548	void
…		…
352	{	558	{
353	// broadcast, this is ugly, but due to the security policy	559	// broadcast, this is ugly, but due to the security policy
354	// we have to connect to all hosts...	560	// we have to connect to all hosts...
355	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	561	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
356	if ((*c)->conf != THISNODE)	562	if ((*c)->conf != THISNODE)
357	(*c)->inject_data_packet (pkt, true);	563	(*c)->inject_data_packet (pkt);
358	}	564	}
359	}	565	}
360		566
361	void	567	void
362	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	568	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
363	{	569	{
364	unsigned int src = pkt->src ();	570	unsigned int src = pkt->src ();
365	unsigned int dst = pkt->dst ();	571	unsigned int dst = pkt->dst ();
366		572
367	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	573	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
368	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	574	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
369		575
370	if (src == 0 \|\| src > conns.size ()	576	if (src == 0 \|\| src > conns.size ()
371	\|\| dst > conns.size ()	577	\|\| dst > conns.size ()
372	\|\| pkt->typ () >= vpn_packet::PT_MAX)	578	\|\| pkt->typ () >= vpn_packet::PT_MAX)
373	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	579	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
374	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
375	else if (dst > conns.size ())
376	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
377	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	580	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
378	else	581	else
379	{	582	{
380	connection *c = conns[src - 1];	583	connection *c = conns[src - 1];
381		584
382	if (dst == 0)	585	if (dst == 0)
383	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	586	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
384	c->conf->nodename, (const char *)rsi);	587	c->conf->nodename, (const char *)rsi);
385	else if (dst != THISNODE->id)	588	else if (dst != THISNODE->id)
386	{	589	{
387	if (THISNODE->routerprio)	590	if (THISNODE->routerprio)
388	// the tos setting gets lost here. who cares.	591	// the tos setting gets lost here. who cares.
389	conns[dst - 1]->inject_vpn_packet (pkt);	592	conns[dst - 1]->inject_vpn_packet (pkt);
390	else	593	else
391	slog (L_WARN,	594	slog (L_WARN,
392	_("%s(%s): forwarding request (=> %s), but we are no router"),	595	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
393	c->conf->nodename, (const char *)rsi,	596	c->conf->nodename, (const char *)rsi,
394	conns[dst - 1]->conf->nodename);	597	conns[dst - 1]->conf->nodename);
395	}	598	}
396	else	599	else
397	c->recv_vpn_packet (pkt, rsi);	600	c->recv_vpn_packet (pkt, rsi);
398	}	601	}
399	}	602	}
400		603
401	void	604	bool
		605	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		606	{
		607	switch (si.prot)
		608	{
		609	case PROT_IPv4:
		610	return send_ipv4_packet (pkt, si, tos);
		611
		612	case PROT_UDPv4:
		613	return send_udpv4_packet (pkt, si, tos);
		614
		615	#if ENABLE_TCP
		616	case PROT_TCPv4:
		617	return send_tcpv4_packet (pkt, si, tos);
		618	#endif
		619	#if ENABLE_ICMP
		620	case PROT_ICMPv4:
		621	return send_icmpv4_packet (pkt, si, tos);
		622	#endif
		623	#if ENABLE_DNS
		624	case PROT_DNSv4:
		625	return send_dnsv4_packet (pkt, si, tos);
		626	#endif
		627	default:
		628	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		629	}
		630
		631	return false;
		632	}
		633
		634	inline void
402	vpn::ipv4_ev (io_watcher &w, short revents)	635	vpn::ipv4_ev (ev::io &w, int revents)
403	{	636	{
404	if (revents & (POLLIN \| POLLERR))	637	if (revents & EV_READ)
405	{	638	{
406	vpn_packet *pkt = new vpn_packet;	639	vpn_packet *pkt = new vpn_packet;
407	struct sockaddr_in sa;	640	struct sockaddr_in sa;
408	socklen_t sa_len = sizeof (sa);	641	socklen_t sa_len = sizeof (sa);
409	int len;	642	int len;
…		…
414		647
415	if (len > 0)	648	if (len > 0)
416	{	649	{
417	pkt->len = len;	650	pkt->len = len;
418		651
419	// raw sockets deliver the ipv4, but don't expect it on sends	652	// raw sockets deliver the ipv4 header, but don't expect it on sends
420	// this is slow, but...	653	pkt->skip_hdr (pkt->ipv4_hdr_len ());
421	pkt->skip_hdr (IP_OVERHEAD);
422		654
423	recv_vpn_packet (pkt, si);	655	recv_vpn_packet (pkt, si);
424	}	656	}
425	else	657	else
426	{	658	{
427	// probably ECONNRESET or somesuch	659	// probably ECONNRESET or somesuch
428	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	660	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
429	}	661	}
430		662
431	delete pkt;	663	delete pkt;
432	}	664	}
433	else if (revents & POLLHUP)
434	{
435	// this cannot ;) happen on udp sockets
436	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
437	exit (1);
438	}
439	else	665	else
440	{	666	{
441	slog (L_ERR,	667	slog (L_ERR,
442	_("FATAL: unknown revents %08x in socket, terminating\n"),	668	_("FATAL: unknown revents %08x in socket, exiting.\n"),
443	revents);	669	revents);
444	exit (1);	670	exit (EXIT_FAILURE);
445	}	671	}
446	}	672	}
447		673
448	#if ENABLE_ICMP	674	#if ENABLE_ICMP
449	void	675	inline void
450	vpn::icmpv4_ev (io_watcher &w, short revents)	676	vpn::icmpv4_ev (ev::io &w, int revents)
451	{	677	{
452	if (revents & (POLLIN \| POLLERR))	678	if (revents & EV_READ)
453	{	679	{
454	vpn_packet *pkt = new vpn_packet;	680	vpn_packet *pkt = new vpn_packet;
455	struct sockaddr_in sa;	681	struct sockaddr_in sa;
456	socklen_t sa_len = sizeof (sa);	682	socklen_t sa_len = sizeof (sa);
457	int len;	683	int len;
…		…
469	if (hdr->type == ::conf.icmp_type	695	if (hdr->type == ::conf.icmp_type
470	&& hdr->code == 255)	696	&& hdr->code == 255)
471	{	697	{
472	// raw sockets deliver the ipv4, but don't expect it on sends	698	// raw sockets deliver the ipv4, but don't expect it on sends
473	// this is slow, but...	699	// this is slow, but...
474	pkt->skip_hdr (ICMP_OVERHEAD);	700	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
475		701
476	recv_vpn_packet (pkt, si);	702	recv_vpn_packet (pkt, si);
477	}	703	}
478	}	704	}
479	else	705	else
480	{	706	{
481	// probably ECONNRESET or somesuch	707	// probably ECONNRESET or somesuch
482	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	708	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
483	}	709	}
484		710
485	delete pkt;	711	delete pkt;
486	}	712	}
487	else if (revents & POLLHUP)
488	{
489	// this cannot ;) happen on udp sockets
490	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
491	exit (1);
492	}
493	else	713	else
494	{	714	{
495	slog (L_ERR,	715	slog (L_ERR,
496	_("FATAL: unknown revents %08x in socket, terminating\n"),	716	_("FATAL: unknown revents %08x in socket, exiting.\n"),
497	revents);	717	revents);
498	exit (1);	718	exit (EXIT_FAILURE);
499	}	719	}
500	}	720	}
501	#endif	721	#endif
502		722
503	void	723	inline void
504	vpn::udpv4_ev (io_watcher &w, short revents)	724	vpn::udpv4_ev (ev::io &w, int revents)
505	{	725	{
506	if (revents & (POLLIN \| POLLERR))	726	if (revents & EV_READ)
507	{	727	{
508	vpn_packet *pkt = new vpn_packet;	728	vpn_packet *pkt = new vpn_packet;
509	struct sockaddr_in sa;	729	struct sockaddr_in sa;
510	socklen_t sa_len = sizeof (sa);	730	socklen_t sa_len = sizeof (sa);
511	int len;	731	int len;
…		…
521	recv_vpn_packet (pkt, si);	741	recv_vpn_packet (pkt, si);
522	}	742	}
523	else	743	else
524	{	744	{
525	// probably ECONNRESET or somesuch	745	// probably ECONNRESET or somesuch
526	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	746	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
527	}	747	}
528		748
529	delete pkt;	749	delete pkt;
530	}	750	}
531	else if (revents & POLLHUP)
532	{
533	// this cannot ;) happen on udp sockets
534	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
535	exit (1);
536	}
537	else	751	else
538	{	752	{
539	slog (L_ERR,	753	slog (L_ERR,
540	_("FATAL: unknown revents %08x in socket, terminating\n"),	754	_("FATAL: unknown revents %08x in socket, exiting.\n"),
541	revents);	755	revents);
542	exit (1);	756	exit (EXIT_FAILURE);
543	}	757	}
544	}	758	}
545		759
546	void	760	inline void
547	vpn::tap_ev (io_watcher &w, short revents)	761	vpn::tap_ev (ev::io &w, int revents)
548	{	762	{
549	if (revents & POLLIN)	763	if (revents & EV_READ)
550	{	764	{
551	/* process data */	765	/* process data */
552	tap_packet *pkt;	766	tap_packet *pkt;
553		767
554	pkt = tap->recv ();	768	pkt = tap->recv ();
…		…
561	int dst = mac2id (pkt->dst);	775	int dst = mac2id (pkt->dst);
562	int src = mac2id (pkt->src);	776	int src = mac2id (pkt->src);
563		777
564	if (src != THISNODE->id)	778	if (src != THISNODE->id)
565	{	779	{
566	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));	780	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
567	exit (1);	781	exit (EXIT_FAILURE);
568	}	782	}
569		783
570	if (dst == THISNODE->id)	784	if (dst == THISNODE->id)
571	{	785	{
572	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));	786	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
573	exit (1);	787	exit (EXIT_FAILURE);
574	}	788	}
575		789
576	if (dst > conns.size ())	790	if (dst > conns.size ())
577	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);	791	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
578	else	792	else
579	inject_data_packet (pkt, dst);	793	inject_data_packet (pkt, dst);
580	}	794	}
581		795
582	delete pkt;	796	delete pkt;
583	}	797	}
584	else if (revents & (POLLHUP \| POLLERR))
585	{
586	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
587	exit (1);
588	}
589	else	798	else
590	abort ();	799	abort ();
591	}	800	}
592		801
593	void	802	inline void
594	vpn::event_cb (time_watcher &w)	803	vpn::event_cb (ev::timer &w, int)
595	{	804	{
596	if (events)	805	if (events)
597	{	806	{
598	if (events & EVENT_SHUTDOWN)	807	if (events & EVENT_SHUTDOWN)
599	{	808	{
600	slog (L_INFO, _("preparing shutdown..."));	809	slog (L_INFO, _("preparing shutdown..."));
601		810
602	shutdown_all ();	811	shutdown_all ();
603
604	remove_pid (pidfilename);	812	remove_pid (conf.pidfilename);
605
606	slog (L_INFO, _("terminating"));	813	slog (L_INFO, _("exiting."));
607		814	exit (EXIT_SUCCESS);
608	exit (0);
609	}	815	}
610		816
611	if (events & EVENT_RECONNECT)	817	if (events & EVENT_RECONNECT)
612	{	818	{
613	slog (L_INFO, _("forced reconnect"));	819	slog (L_INFO, _("forced reconnect."));
614		820
615	reconnect_all ();	821	reconnect_all ();
616	}	822	}
617		823
618	events = 0;	824	events = 0;
619	}	825	}
620
621	w.at = TSTAMP_CANCEL;
622	}	826	}
623		827
624	void	828	void
625	vpn::shutdown_all ()	829	vpn::shutdown_all ()
626	{	830	{
…		…
636		840
637	conns.clear ();	841	conns.clear ();
638		842
639	connection_init ();	843	connection_init ();
640		844
641	for (configuration::node_vector::iterator i = conf.nodes.begin ();	845	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
642	i != conf.nodes.end (); ++i)	846	conns.push_back (new connection (this, *i));
643	{
644	connection *conn = new connection (this);
645		847
646	conn->conf = *i;	848	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
647	conns.push_back (conn);
648
649	conn->establish_connection ();	849	(*c)->establish_connection ();
650	}
651	}	850	}
652		851
653	connection *vpn::find_router ()	852	bool
		853	vpn::can_direct (conf_node src, conf_node dst) const
654	{	854	{
655	u32 prio = 1;	855	return src != dst
		856	&& src->may_direct (dst)
		857	&& dst->may_direct (src)
		858	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		859	\|\| (src->protocols & dst->connectable_protocols ()));
		860	}
		861
		862	// only works for indirect and routed connections: find a router
		863	// from THISNODE to dst
		864	connection *
		865	vpn::find_router_for (const connection *dst)
		866	{
656	connection *router = 0;	867	connection *router = 0;
657		868
		869	// first try to find a router with a direct connection, route there
		870	// regardless of any other considerations.
		871	{
		872	u32 prio = 1;
		873
		874	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		875	{
		876	connection c = i;
		877
		878	if (c->conf->routerprio > prio
		879	&& c->conf != THISNODE
		880	&& can_direct (c->conf, dst->conf)
		881	&& c->ictx && c->octx)
		882	{
		883	prio = c->conf->routerprio;
		884	router = c;
		885	}
		886	}
		887	}
		888
		889	if (router)
		890	return router;
		891
		892	// second try find the router with the highest priority, higher than ours
		893	{
		894	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		895
		896	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		897	{
		898	connection c = i;
		899
		900	if (c->conf->routerprio > prio
		901	&& c != dst
		902	&& c->conf != THISNODE
		903	&& c->ictx && c->octx)
		904	{
		905	prio = c->conf->routerprio;
		906	router = c;
		907	}
		908	}
		909	}
		910
		911	return router;
		912	}
		913
		914	void
		915	vpn::connection_established (connection *c)
		916	{
658	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	917	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
659	{	918	{
660	connection c = i;	919	connection o = i;
661		920
662	if (c->conf->routerprio > prio	921	if (o->si.valid ()
663	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	922	&& c->si != o->si
664	&& c->ictx && c->octx	923	&& c == find_router_for (o)
665	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	924	&& !can_direct (THISNODE, o->conf))
666	{
667	prio = c->conf->routerprio;
668	router = c;
669	}	925	{
		926	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		927	o->conf->nodename, c->conf->nodename);
		928	o->rekey ();
		929	}
670	}	930	}
671
672	return router;
673	}	931	}
674		932
		933	void
675	void vpn::send_connect_request (int id)	934	vpn::send_connect_request (connection *c)
676	{	935	{
677	connection *c = find_router ();	936	connection *r = find_router_for (c);
678		937
679	if (c)	938	if (r)
		939	{
		940	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		941	c->conf->nodename, r->conf->nodename);
680	c->send_connect_request (id);	942	r->send_connect_request (c->conf->id);
		943	}
681	else	944	else
682	// no router found, aggressively connect to all routers	945	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
683	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	946	c->conf->nodename);
684	if ((i)->conf->routerprio && (i)->conf != THISNODE)
685	(*i)->establish_connection ();
686	}	947	}
687		948
688	void	949	void
689	connection::dump_status ()	950	connection::dump_status ()
690	{	951	{
691	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	952	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
692	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	953	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
693	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	954	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
694	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	955	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
695	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	956	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
696	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
697	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
698	}	957	}
699		958
700	void	959	void
701	vpn::dump_status ()	960	vpn::dump_status ()
702	{	961	{
703	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	962	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
704		963
705	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	964	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
706	(*c)->dump_status ();	965	(*c)->dump_status ();
707		966
708	slog (L_NOTICE, _("END status dump"));	967	slog (L_NOTICE, _("END status dump"));
709	}	968	}
710		969
711	vpn::vpn (void)	970	vpn::vpn (void)
		971	{
712	: event (this, &vpn::event_cb)	972	event .set<vpn, &vpn::event_cb > (this);
713	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	973	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
714	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	974	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
715	#if ENABLE_TCP	975	#if ENABLE_TCP
716	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	976	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
717	#endif	977	#endif
718	#if ENABLE_ICMP	978	#if ENABLE_ICMP
719	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	979	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
720	#endif	980	#endif
721	, tap_ev_watcher (this, &vpn::tap_ev)	981	#if ENABLE_DNS
722	{	982	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		983	#endif
		984	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
723	}	985	}
724		986
725	vpn::~vpn ()	987	vpn::~vpn ()
726	{	988	{
727	}	989	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs. Revision 1.70 by root, Thu Oct 6 03:03:09 2022 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs.
Revision 1.70 by root, Thu Oct 6 03:03:09 2022 UTC