[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 1.71 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 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);	260	// no clue where trhis is actually defined
		261	#if !defined(ICMP_FILTER) && defined(__linux)
		262	#define ICMP_FILTER 1
		263	#endif
161		264
162	#ifdef ICMP_FILTER	265	#ifdef ICMP_FILTER
163	{	266	{
164	icmp_filter oval;	267	uint32_t oval;
165	oval.data = 0xffffffff;	268	oval = 0;
166	if (::conf.icmp_type < 32)	269	if (::conf.icmp_type < 32)
167	oval.data &= ~(1 << ::conf.icmp_type);	270	oval \|= 1 << ::conf.icmp_type;
		271	oval = ~oval;
168		272
169	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);	273	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
170	}	274	}
171	#endif	275	#endif
172		276
…		…
174	// this I really consider a linux bug. I am neither connected	278	// this I really consider a linux bug. I am neither connected
175	// nor do I fragment myself. Linux still sets DF and doesn't	279	// nor do I fragment myself. Linux still sets DF and doesn't
176	// fragment for me sometimes.	280	// fragment for me sometimes.
177	{	281	{
178	int oval = IP_PMTUDISC_DONT;	282	int oval = IP_PMTUDISC_DONT;
179	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	283	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
180	}	284	}
181	#endif	285	#endif
182		286
183	sockinfo si (THISNODE, PROT_ICMPv4);	287	sockinfo si (THISNODE, PROT_ICMPv4);
184		288
185	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	289	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
186	{	290	{
187	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	291	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
188	exit (1);	292	return -1;
189	}	293	}
190		294
191	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	295	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		296	++success;
192	}	297	}
193	#endif	298	#endif
194		299
195	tcpv4_fd = -1;	300	tcpv4_fd = -1;
196		301
197	#if ENABLE_TCP	302	#if ENABLE_TCP
198	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	303	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
199	{	304	{
200	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	305	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
201		306
202	if (tcpv4_fd < 0)	307	if (tcpv4_fd < 0)
203	return -1;	308	return -1;
204		309
205	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
206
207	// standard daemon practise...	310	// standard daemon practise...
208	{	311	{
209	int oval = 1;	312	int oval = 1;
210	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	313	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
211	}	314	}
212		315
213	sockinfo si (THISNODE, PROT_TCPv4);	316	sockinfo si (THISNODE, PROT_TCPv4);
214		317
215	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	318	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
216	{	319	{
217	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));
218	exit (1);	321	return -1;
219	}	322	}
220		323
221	if (listen (tcpv4_fd, 5))	324	if (listen (tcpv4_fd, 5))
222	{	325	{
223	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));
224	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);
225	}	357	}
226
227	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
228	}
229	#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	/////////////////////////////////////////////////////////////////////////////
230		392
231	tap = new tap_device ();	393	tap = new tap_device ();
232	if (!tap) //D this, of course, never catches	394	if (!tap) //D this, of course, never catches
233	{	395	{
234	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	396	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
235	exit (1);	397	return -1;
236	}	398	}
237		399
238	run_script (run_script_cb (this, &vpn::script_if_up), true);	400	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
239		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
240	tap_ev_watcher.start (tap->fd, POLLIN);	420	tap_ev_watcher.start (tap->fd, EV_READ);
241
242	reconnect_all ();
243		421
244	return 0;	422	return 0;
245	}	423	}
246		424
247	// send a vpn packet out to other hosts
248	bool	425	bool
249	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	426	vpn::drop_privileges ()
250	{	427	{
251	switch (si.prot)	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))
252	{	478	{
253	case PROT_IPv4:	479	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;	480	return false;
272	}	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;
273	}	491	}
274		492
275	bool	493	bool
276	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	494	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
277	{	495	{
278	#if defined(SOL_IP) && defined(IP_TOS)	496	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 ());	497	xsendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
282		498
283	return true;	499	return true;
284	}	500	}
285		501
286	static u16	502	static u16
…		…
308		524
309	#if ENABLE_ICMP	525	#if ENABLE_ICMP
310	bool	526	bool
311	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	527	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
312	{	528	{
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);	529	pkt->unshift_hdr (4);
318		530
319	icmp_header hdr = (icmp_header )&((*pkt)[0]);	531	icmp_header hdr = (icmp_header )&((*pkt)[0]);
320	hdr->type = ::conf.icmp_type;	532	hdr->type = ::conf.icmp_type;
321	hdr->code = 255;	533	hdr->code = 255;
322	hdr->checksum = 0;	534	hdr->checksum = 0;
323	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	535	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
324		536
		537	set_tos (icmpv4_fd, icmpv4_tos, tos);
325	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	538	xsendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
326		539
327	return true;	540	return true;
328	}	541	}
329	#endif	542	#endif
330		543
331	bool	544	bool
332	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	545	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
333	{	546	{
334	#if defined(SOL_IP) && defined(IP_TOS)	547	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 ());	548	xsendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
338		549
339	return true;	550	return true;
340	}	551	}
341		552
342	void	553	void
…		…
352	{	563	{
353	// broadcast, this is ugly, but due to the security policy	564	// broadcast, this is ugly, but due to the security policy
354	// we have to connect to all hosts...	565	// we have to connect to all hosts...
355	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	566	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
356	if ((*c)->conf != THISNODE)	567	if ((*c)->conf != THISNODE)
357	(*c)->inject_data_packet (pkt, true);	568	(*c)->inject_data_packet (pkt);
358	}	569	}
359	}	570	}
360		571
361	void	572	void
362	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	573	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
363	{	574	{
364	unsigned int src = pkt->src ();	575	unsigned int src = pkt->src ();
365	unsigned int dst = pkt->dst ();	576	unsigned int dst = pkt->dst ();
366		577
367	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."),
368	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	579	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
369		580
370	if (src == 0 \|\| src > conns.size ()	581	if (src == 0 \|\| src > conns.size ()
371	\|\| dst > conns.size ()	582	\|\| dst > conns.size ()
372	\|\| pkt->typ () >= vpn_packet::PT_MAX)	583	\|\| pkt->typ () >= vpn_packet::PT_MAX)
373	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)."),
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 ());	585	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
378	else	586	else
379	{	587	{
380	connection *c = conns[src - 1];	588	connection *c = conns[src - 1];
381		589
382	if (dst == 0)	590	if (dst == 0)
383	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	591	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
384	c->conf->nodename, (const char *)rsi);	592	c->conf->nodename, (const char *)rsi);
385	else if (dst != THISNODE->id)	593	else if (dst != THISNODE->id)
386	{	594	{
387	if (THISNODE->routerprio)	595	if (THISNODE->routerprio)
388	// the tos setting gets lost here. who cares.	596	// the tos setting gets lost here. who cares.
389	conns[dst - 1]->inject_vpn_packet (pkt);	597	conns[dst - 1]->inject_vpn_packet (pkt);
390	else	598	else
391	slog (L_WARN,	599	slog (L_WARN,
392	_("%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?)."),
393	c->conf->nodename, (const char *)rsi,	601	c->conf->nodename, (const char *)rsi,
394	conns[dst - 1]->conf->nodename);	602	conns[dst - 1]->conf->nodename);
395	}	603	}
396	else	604	else
397	c->recv_vpn_packet (pkt, rsi);	605	c->recv_vpn_packet (pkt, rsi);
398	}	606	}
399	}	607	}
400		608
401	void	609	bool
		610	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		611	{
		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
402	vpn::ipv4_ev (io_watcher &w, short revents)	640	vpn::ipv4_ev (ev::io &w, int revents)
403	{	641	{
404	if (revents & (POLLIN \| POLLERR))	642	if (revents & EV_READ)
405	{	643	{
406	vpn_packet *pkt = new vpn_packet;	644	vpn_packet *pkt = new vpn_packet;
407	struct sockaddr_in sa;	645	struct sockaddr_in sa;
408	socklen_t sa_len = sizeof (sa);	646	socklen_t sa_len = sizeof (sa);
409	int len;	647	int len;
…		…
414		652
415	if (len > 0)	653	if (len > 0)
416	{	654	{
417	pkt->len = len;	655	pkt->len = len;
418		656
419	// raw sockets deliver the ipv4, but don't expect it on sends	657	// raw sockets deliver the ipv4 header, but don't expect it on sends
420	// this is slow, but...	658	pkt->skip_hdr (pkt->ipv4_hdr_len ());
421	pkt->skip_hdr (IP_OVERHEAD);
422		659
423	recv_vpn_packet (pkt, si);	660	recv_vpn_packet (pkt, si);
424	}	661	}
425	else	662	else
426	{	663	{
427	// probably ECONNRESET or somesuch	664	// probably ECONNRESET or somesuch
428	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	665	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
429	}	666	}
430		667
431	delete pkt;	668	delete pkt;
432	}	669	}
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	670	else
440	{	671	{
441	slog (L_ERR,	672	slog (L_ERR,
442	_("FATAL: unknown revents %08x in socket, terminating\n"),	673	_("FATAL: unknown revents %08x in socket, exiting.\n"),
443	revents);	674	revents);
444	exit (1);	675	exit (EXIT_FAILURE);
445	}	676	}
446	}	677	}
447		678
448	#if ENABLE_ICMP	679	#if ENABLE_ICMP
449	void	680	inline void
450	vpn::icmpv4_ev (io_watcher &w, short revents)	681	vpn::icmpv4_ev (ev::io &w, int revents)
451	{	682	{
452	if (revents & (POLLIN \| POLLERR))	683	if (revents & EV_READ)
453	{	684	{
454	vpn_packet *pkt = new vpn_packet;	685	vpn_packet *pkt = new vpn_packet;
455	struct sockaddr_in sa;	686	struct sockaddr_in sa;
456	socklen_t sa_len = sizeof (sa);	687	socklen_t sa_len = sizeof (sa);
457	int len;	688	int len;
…		…
469	if (hdr->type == ::conf.icmp_type	700	if (hdr->type == ::conf.icmp_type
470	&& hdr->code == 255)	701	&& hdr->code == 255)
471	{	702	{
472	// 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
473	// this is slow, but...	704	// this is slow, but...
474	pkt->skip_hdr (ICMP_OVERHEAD);	705	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
475		706
476	recv_vpn_packet (pkt, si);	707	recv_vpn_packet (pkt, si);
477	}	708	}
478	}	709	}
479	else	710	else
480	{	711	{
481	// probably ECONNRESET or somesuch	712	// probably ECONNRESET or somesuch
482	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	713	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
483	}	714	}
484		715
485	delete pkt;	716	delete pkt;
486	}	717	}
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	718	else
494	{	719	{
495	slog (L_ERR,	720	slog (L_ERR,
496	_("FATAL: unknown revents %08x in socket, terminating\n"),	721	_("FATAL: unknown revents %08x in socket, exiting.\n"),
497	revents);	722	revents);
498	exit (1);	723	exit (EXIT_FAILURE);
499	}	724	}
500	}	725	}
501	#endif	726	#endif
502		727
503	void	728	inline void
504	vpn::udpv4_ev (io_watcher &w, short revents)	729	vpn::udpv4_ev (ev::io &w, int revents)
505	{	730	{
506	if (revents & (POLLIN \| POLLERR))	731	if (revents & EV_READ)
507	{	732	{
508	vpn_packet *pkt = new vpn_packet;	733	vpn_packet *pkt = new vpn_packet;
509	struct sockaddr_in sa;	734	struct sockaddr_in sa;
510	socklen_t sa_len = sizeof (sa);	735	socklen_t sa_len = sizeof (sa);
511	int len;	736	int len;
…		…
521	recv_vpn_packet (pkt, si);	746	recv_vpn_packet (pkt, si);
522	}	747	}
523	else	748	else
524	{	749	{
525	// probably ECONNRESET or somesuch	750	// probably ECONNRESET or somesuch
526	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	751	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
527	}	752	}
528		753
529	delete pkt;	754	delete pkt;
530	}	755	}
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	756	else
538	{	757	{
539	slog (L_ERR,	758	slog (L_ERR,
540	_("FATAL: unknown revents %08x in socket, terminating\n"),	759	_("FATAL: unknown revents %08x in socket, exiting.\n"),
541	revents);	760	revents);
542	exit (1);	761	exit (EXIT_FAILURE);
543	}	762	}
544	}	763	}
545		764
546	void	765	inline void
547	vpn::tap_ev (io_watcher &w, short revents)	766	vpn::tap_ev (ev::io &w, int revents)
548	{	767	{
549	if (revents & POLLIN)	768	if (revents & EV_READ)
550	{	769	{
551	/* process data */	770	/* process data */
552	tap_packet *pkt;	771	tap_packet *pkt;
553		772
554	pkt = tap->recv ();	773	pkt = tap->recv ();
…		…
561	int dst = mac2id (pkt->dst);	780	int dst = mac2id (pkt->dst);
562	int src = mac2id (pkt->src);	781	int src = mac2id (pkt->src);
563		782
564	if (src != THISNODE->id)	783	if (src != THISNODE->id)
565	{	784	{
566	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));	785	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
567	exit (1);	786	exit (EXIT_FAILURE);
568	}	787	}
569		788
570	if (dst == THISNODE->id)	789	if (dst == THISNODE->id)
571	{	790	{
572	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));	791	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
573	exit (1);	792	exit (EXIT_FAILURE);
574	}	793	}
575		794
576	if (dst > conns.size ())	795	if (dst > conns.size ())
577	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);	796	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
578	else	797	else
579	inject_data_packet (pkt, dst);	798	inject_data_packet (pkt, dst);
580	}	799	}
581		800
582	delete pkt;	801	delete pkt;
583	}	802	}
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	803	else
590	abort ();	804	abort ();
591	}	805	}
592		806
593	void	807	inline void
594	vpn::event_cb (time_watcher &w)	808	vpn::event_cb (ev::timer &w, int)
595	{	809	{
596	if (events)	810	if (events)
597	{	811	{
598	if (events & EVENT_SHUTDOWN)	812	if (events & EVENT_SHUTDOWN)
599	{	813	{
600	slog (L_INFO, _("preparing shutdown..."));	814	slog (L_INFO, _("preparing shutdown..."));
601		815
602	shutdown_all ();	816	shutdown_all ();
603
604	remove_pid (pidfilename);	817	remove_pid (conf.pidfilename);
605
606	slog (L_INFO, _("terminating"));	818	slog (L_INFO, _("exiting."));
607		819	exit (EXIT_SUCCESS);
608	exit (0);
609	}	820	}
610		821
611	if (events & EVENT_RECONNECT)	822	if (events & EVENT_RECONNECT)
612	{	823	{
613	slog (L_INFO, _("forced reconnect"));	824	slog (L_INFO, _("forced reconnect."));
614		825
615	reconnect_all ();	826	reconnect_all ();
616	}	827	}
617		828
618	events = 0;	829	events = 0;
619	}	830	}
620
621	w.at = TSTAMP_CANCEL;
622	}	831	}
623		832
624	void	833	void
625	vpn::shutdown_all ()	834	vpn::shutdown_all ()
626	{	835	{
…		…
636		845
637	conns.clear ();	846	conns.clear ();
638		847
639	connection_init ();	848	connection_init ();
640		849
641	for (configuration::node_vector::iterator i = conf.nodes.begin ();	850	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
642	i != conf.nodes.end (); ++i)	851	conns.push_back (new connection (this, *i));
643	{
644	connection *conn = new connection (this);
645		852
646	conn->conf = *i;	853	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
647	conns.push_back (conn);
648
649	conn->establish_connection ();	854	(*c)->establish_connection ();
650	}
651	}	855	}
652		856
653	connection *vpn::find_router ()	857	bool
		858	vpn::can_direct (conf_node src, conf_node dst) const
654	{	859	{
655	u32 prio = 1;	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	{
656	connection *router = 0;	872	connection *router = 0;
657		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	{
658	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	922	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
659	{	923	{
660	connection c = i;	924	connection o = i;
661		925
662	if (c->conf->routerprio > prio	926	if (o->si.valid ()
663	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	927	&& c->si != o->si
664	&& c->ictx && c->octx	928	&& c == find_router_for (o)
665	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	929	&& !can_direct (THISNODE, o->conf))
666	{
667	prio = c->conf->routerprio;
668	router = c;
669	}	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	}
670	}	935	}
671
672	return router;
673	}	936	}
674		937
		938	void
675	void vpn::send_connect_request (int id)	939	vpn::send_connect_request (connection *c)
676	{	940	{
677	connection *c = find_router ();	941	connection *r = find_router_for (c);
678		942
679	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);
680	c->send_connect_request (id);	947	r->send_connect_request (c->conf->id);
		948	}
681	else	949	else
682	// no router found, aggressively connect to all routers	950	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)	951	c->conf->nodename);
684	if ((i)->conf->routerprio && (i)->conf != THISNODE)
685	(*i)->establish_connection ();
686	}	952	}
687		953
688	void	954	void
689	connection::dump_status ()	955	connection::dump_status ()
690	{	956	{
691	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	957	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
692	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	958	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
693	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	959	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
694	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"),
695	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	961	(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	}	962	}
699		963
700	void	964	void
701	vpn::dump_status ()	965	vpn::dump_status ()
702	{	966	{
703	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	967	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
704		968
705	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	969	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
706	(*c)->dump_status ();	970	(*c)->dump_status ();
707		971
708	slog (L_NOTICE, _("END status dump"));	972	slog (L_NOTICE, _("END status dump"));
709	}	973	}
710		974
711	vpn::vpn (void)	975	vpn::vpn (void)
		976	{
712	: event (this, &vpn::event_cb)	977	event .set<vpn, &vpn::event_cb > (this);
713	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	978	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
714	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	979	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
715	#if ENABLE_TCP	980	#if ENABLE_TCP
716	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	981	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
717	#endif	982	#endif
718	#if ENABLE_ICMP	983	#if ENABLE_ICMP
719	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	984	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
720	#endif	985	#endif
721	, tap_ev_watcher (this, &vpn::tap_ev)	986	#if ENABLE_DNS
722	{	987	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		988	#endif
		989	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
723	}	990	}
724		991
725	vpn::~vpn ()	992	vpn::~vpn ()
726	{	993	{
727	}	994	}

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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 1.71 by root, Thu Oct 6 03:25:54 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 1.71 by root, Thu Oct 6 03:25:54 2022 UTC