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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs.
Revision 1.65 by root, Tue Jul 16 16:44:37 2013 UTC

…		…
1	/*	1	/*
2	vpn.C -- handle the protocol, encryption, handshaking etc.	2	vpn.C -- handle the protocol, encryption, handshaking etc.
		3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
3		4
		5	This file is part of GVPE.
		6
4	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
5	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
6	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
7	(at your option) any later version.	10	option) any later version.
8		11
9	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
10	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
12	GNU General Public License for more details.	15	Public License for more details.
13		16
14	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
15	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
16	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
17	*/	30	*/
18		31
19	#include "config.h"	32	#include "config.h"
20		33
21	#include <list>	34	#include <list>
22		35
		36	#include <cstdio>
		37	#include <cstring>
23	#include <cstdlib>	38	#include <cstdlib>
24	#include <cstring>
25	#include <cstdio>
26		39
27	#include <sys/types.h>	40	#include <sys/types.h>
28	#include <sys/socket.h>	41	#include <sys/socket.h>
29	#include <sys/poll.h>
30	#include <sys/wait.h>	42	#include <sys/wait.h>
		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>
36	#include <netinet/in.h>	49
37	#include <arpa/inet.h>	50	#include "netcompat.h"
38	#include <net/if.h>
39	#ifdef HAVE_NETINET_IN_SYSTM_H
40	# include <netinet/in_systm.h>
41	#endif
42	#ifdef HAVE_NETINET_IP_H
43	# include <netinet/ip.h>
44	#endif
45	#ifdef HAVE_NETINET_TCP_H
46	# include <netinet/tcp.h>
47	#endif
48	#if ENABLE_ICMP
49	# include <netinet/ip_icmp.h>
50	#endif
51		51
52	#include "pidfile.h"	52	#include "pidfile.h"
53		53
54	#include "connection.h"	54	#include "connection.h"
55	#include "util.h"	55	#include "util.h"
56	#include "vpn.h"	56	#include "vpn.h"
57		57
58	#if !defined(SOL_IP) && defined(IPPROTO_IP)	58	using namespace std;
59	# define SOL_IP IPPROTO_IP	59
60	#endif	60	vpn network; // THE vpn (bad design...)
61		61
62	/////////////////////////////////////////////////////////////////////////////	62	/////////////////////////////////////////////////////////////////////////////
63		63
64	const char *vpn::script_if_up ()	64	static void inline
		65	set_tos (int fd, int &tos_prev, int tos)
		66	{
		67	#if defined(SOL_IP) && defined(IP_TOS)
		68	if (tos_prev == tos)
		69	return;
		70
		71	tos_prev = tos;
		72	setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		73	#endif
		74	}
		75
		76	void
		77	vpn::script_init_env ()
65	{	78	{
66	// the tunnel device mtu should be the physical mtu - overhead	79	// the tunnel device mtu should be the physical mtu - overhead
67	// the tricky part is rounding to the cipher key blocksize	80	// the tricky part is rounding to the cipher key blocksize
68	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	81	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
69	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	82	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
70	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	83	mtu -= mtu % BLOCK_SIZE (CIPHER); // round
71	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	84	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
72		85
73	char *env;	86	char *env;
74	asprintf (&env, "CONFBASE=%s", confbase);	87	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
75	putenv (env);
76	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
77	putenv (env);
78	asprintf (&env, "NODEID=%d", THISNODE->id);
79	putenv (env);
80	asprintf (&env, "IFNAME=%s", tap->interface ());	88	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
81	putenv (env);	89	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		90	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
82	asprintf (&env, "MTU=%d", mtu);	91	asprintf (&env, "MTU=%d", mtu); putenv (env);
83	putenv (env);	92	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
84	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	93	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
85	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
86	THISNODE->id & 0xff);
87	putenv (env);
88		94
		95	conns [THISNODE->id - 1]->script_init_env ("");
		96
		97	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		98	{
		99	char ext[16];
		100	snprintf (ext, 16, "_%d", (*c)->conf->id);
		101	(*c)->script_init_env (ext);
		102	}
		103	}
		104
		105	inline const char *
		106	vpn::script_if_init ()
		107	{
		108	script_init_env ();
		109
		110	return tap->if_up ();
		111	}
		112
		113	inline const char *
		114	vpn::script_if_up ()
		115	{
		116	script_init_env ();
		117
		118	char *filename;
		119	asprintf (&filename,
		120	"%s/%s",
		121	confbase,
89	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	122	::conf.script_if_up ? ::conf.script_if_up : "if-up");
		123
		124	return filename;
		125	}
		126
		127	int
		128	vpn::setup_socket (u8 prot, int family, int type, int proto)
		129	{
		130	int fd = socket (family, type, proto);
		131
		132	if (fd < 0)
		133	{
		134	slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno));
		135	return fd;
		136	}
		137
		138	fcntl (fd, F_SETFL, O_NONBLOCK);
		139	fcntl (fd, F_SETFD, FD_CLOEXEC);
		140
		141	#ifdef SO_MARK
		142	if (::conf.nfmark)
		143	if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark))
		144	slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno));
		145	#endif
		146
		147	return fd;
90	}	148	}
91		149
92	int	150	int
93	vpn::setup ()	151	vpn::setup ()
94	{	152	{
		153	int success = 0;
		154
		155	ipv4_tos = -1;
95	ipv4_fd = -1;	156	ipv4_fd = -1;
96		157
97	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	158	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
98	{	159	{
99	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	160	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
100		161
101	if (ipv4_fd < 0)	162	if (ipv4_fd < 0)
102	return -1;	163	return -1;
103
104	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
105		164
106	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	165	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
107	// this I really consider a linux bug. I am neither connected	166	// this I really consider a linux bug. I am neither connected
108	// nor do I fragment myself. Linux still sets DF and doesn't	167	// nor do I fragment myself. Linux still sets DF and doesn't
109	// fragment for me sometimes.	168	// fragment for me sometimes.
115		174
116	sockinfo si (THISNODE, PROT_IPv4);	175	sockinfo si (THISNODE, PROT_IPv4);
117		176
118	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	177	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
119	{	178	{
120	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	179	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
121	exit (1);	180	return -1;
122	}	181	}
123		182
124	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	183	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		184	++success;
125	}	185	}
		186	else
		187	THISNODE->protocols &= ~PROT_IPv4;
126		188
		189	udpv4_tos = -1;
127	udpv4_fd = -1;	190	udpv4_fd = -1;
128		191
129	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	192	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
130	{	193	{
131	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	194	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
132		195
133	if (udpv4_fd < 0)	196	if (udpv4_fd < 0)
134	return -1;	197	return -1;
135
136	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
137		198
138	// standard daemon practise...	199	// standard daemon practise...
139	{	200	{
140	int oval = 1;	201	int oval = 1;
141	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	202	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
153		214
154	sockinfo si (THISNODE, PROT_UDPv4);	215	sockinfo si (THISNODE, PROT_UDPv4);
155		216
156	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	217	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
157	{	218	{
158	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	219	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
159	exit (1);	220	return -1;
160	}	221	}
161		222
162	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	223	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		224	++success;
163	}	225	}
		226	else
		227	THISNODE->protocols &= ~PROT_UDPv4;
164		228
		229	icmpv4_tos = -1;
165	icmpv4_fd = -1;	230	icmpv4_fd = -1;
166		231
167	#if ENABLE_ICMP	232	#if ENABLE_ICMP
168	if (THISNODE->protocols & PROT_ICMPv4)	233	if (THISNODE->protocols & PROT_ICMPv4)
169	{	234	{
170	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	235	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
171		236
172	if (icmpv4_fd < 0)	237	if (icmpv4_fd < 0)
173	return -1;	238	return -1;
174
175	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
176		239
177	#ifdef ICMP_FILTER	240	#ifdef ICMP_FILTER
178	{	241	{
179	icmp_filter oval;	242	icmp_filter oval;
180	oval.data = 0xffffffff;	243	oval.data = 0xffffffff;
…		…
189	// this I really consider a linux bug. I am neither connected	252	// this I really consider a linux bug. I am neither connected
190	// nor do I fragment myself. Linux still sets DF and doesn't	253	// nor do I fragment myself. Linux still sets DF and doesn't
191	// fragment for me sometimes.	254	// fragment for me sometimes.
192	{	255	{
193	int oval = IP_PMTUDISC_DONT;	256	int oval = IP_PMTUDISC_DONT;
194	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	257	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
195	}	258	}
196	#endif	259	#endif
197		260
198	sockinfo si (THISNODE, PROT_ICMPv4);	261	sockinfo si (THISNODE, PROT_ICMPv4);
199		262
200	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	263	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
201	{	264	{
202	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	265	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
203	exit (1);	266	return -1;
204	}	267	}
205		268
206	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	269	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		270	++success;
207	}	271	}
208	#endif	272	#endif
209		273
210	tcpv4_fd = -1;	274	tcpv4_fd = -1;
211		275
212	#if ENABLE_TCP	276	#if ENABLE_TCP
213	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	277	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
214	{	278	{
215	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	279	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
216		280
217	if (tcpv4_fd < 0)	281	if (tcpv4_fd < 0)
218	return -1;	282	return -1;
219		283
220	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
221
222	// standard daemon practise...	284	// standard daemon practise...
223	{	285	{
224	int oval = 1;	286	int oval = 1;
225	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	287	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
226	}	288	}
227		289
228	sockinfo si (THISNODE, PROT_TCPv4);	290	sockinfo si (THISNODE, PROT_TCPv4);
229		291
230	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	292	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
231	{	293	{
232	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	294	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
233	exit (1);	295	return -1;
234	}	296	}
235		297
236	if (listen (tcpv4_fd, 5))	298	if (listen (tcpv4_fd, 5))
237	{	299	{
238	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	300	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
239	exit (1);	301	return -1;
		302	}
		303
		304	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		305	++success;
		306	}
		307	else
		308	THISNODE->protocols &= ~PROT_TCPv4;
		309	#endif
		310
		311	dnsv4_tos = -1;
		312	dnsv4_fd = -1;
		313
		314	#if ENABLE_DNS
		315	if (THISNODE->protocols & PROT_DNSv4)
		316	{
		317	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		318
		319	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		320
		321	if (dnsv4_fd < 0)
		322	return -1;
		323
		324	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		325	// this I really consider a linux bug. I am neither connected
		326	// nor do I fragment myself. Linux still sets DF and doesn't
		327	// fragment for me sometimes.
		328	{
		329	int oval = IP_PMTUDISC_DONT;
		330	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
240	}	331	}
241
242	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
243	}
244	#endif	332	# endif
		333
		334	// standard daemon practise...
		335	{
		336	int oval = 1;
		337	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		338	}
		339
		340	sockinfo si (THISNODE->dns_hostname,
		341	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		342	PROT_DNSv4);
		343
		344	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		345	{
		346	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		347	return -1;
		348	}
		349
		350	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		351	++success;
		352	}
		353	#endif
		354
		355	/////////////////////////////////////////////////////////////////////////////
		356
		357	if (!success)
		358	{
		359	slog (L_ERR, _("no protocols enabled."));
		360	return -1;
		361	}
		362
		363	reconnect_all ();
		364
		365	/////////////////////////////////////////////////////////////////////////////
245		366
246	tap = new tap_device ();	367	tap = new tap_device ();
247	if (!tap) //D this, of course, never catches	368	if (!tap) //D this, of course, never catches
248	{	369	{
249	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	370	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
250	exit (1);	371	return -1;
251	}	372	}
252		373
253	run_script (run_script_cb (this, &vpn::script_if_up), true);	374	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
254		375
		376	run_script_cb cb;
		377	cb.set<vpn, &vpn::script_if_init> (this);
		378
		379	if (tap->if_up () &&
		380	!run_script (cb, true))
		381	{
		382	slog (L_ERR, _("interface initialization command '%s' failed."),
		383	tap->if_up ());
		384	return -1;
		385	}
		386
		387	cb.set<vpn, &vpn::script_if_up> (this);
		388	if (!run_script (cb, true))
		389	{
		390	slog (L_ERR, _("if-up command execution failed."));
		391	return -1;
		392	}
		393
255	tap_ev_watcher.start (tap->fd, POLLIN);	394	tap_ev_watcher.start (tap->fd, EV_READ);
256
257	reconnect_all ();
258		395
259	return 0;	396	return 0;
260	}	397	}
261		398
262	// send a vpn packet out to other hosts
263	bool	399	bool
264	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	400	vpn::drop_privileges ()
265	{	401	{
266	switch (si.prot)	402	if (::conf.change_root)
		403	{
		404	if (!strcmp (::conf.change_root, "/"))
		405	{
		406	char dir [L_tmpnam];
		407	if (!tmpnam (dir))
		408	{
		409	slog (L_CRIT, _("unable to create anonymous root path."));
		410	return false;
		411	}
		412
		413	if (mkdir (dir, 0700))
		414	{
		415	slog (L_CRIT, _("unable to crate anonymous root directory."));
		416	return false;
		417	}
		418
		419	if (chdir (dir))
		420	{
		421	slog (L_CRIT, _("unable to change to anonymous root directory."));
		422	return false;
		423	}
		424
		425	if (rmdir (dir))
		426	slog (L_ERR, _("unable to remove anonymous root directory, continuing."));
		427	}
		428	else
		429	{
		430	if (chdir (::conf.change_root))
		431	{
		432	slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root);
		433	return false;
		434	}
		435	}
		436
		437	if (chroot ("."))
		438	{
		439	slog (L_CRIT, _("unable to set new root directory."));
		440	return false;
		441	}
		442
		443	if (chdir ("/"))
		444	{
		445	slog (L_CRIT, _("unable to set cwd to new root directory."));
		446	return false;
		447	}
		448	}
		449
		450	if (::conf.change_gid)
		451	if (setgid (::conf.change_gid))
267	{	452	{
268	case PROT_IPv4:	453	slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid);
269	return send_ipv4_packet (pkt, si, tos);
270
271	case PROT_UDPv4:
272	return send_udpv4_packet (pkt, si, tos);
273
274	#if ENABLE_TCP
275	case PROT_TCPv4:
276	return send_tcpv4_packet (pkt, si, tos);
277	#endif
278
279	#if ENABLE_ICMP
280	case PROT_ICMPv4:
281	return send_icmpv4_packet (pkt, si, tos);
282	#endif
283
284	default:
285	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
286	return false;	454	return false;
287	}	455	}
		456
		457	if (::conf.change_uid)
		458	if (setuid (::conf.change_uid))
		459	{
		460	slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid);
		461	return false;
		462	}
		463
		464	return true;
288	}	465	}
289		466
290	bool	467	bool
291	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	468	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
292	{	469	{
293	#if defined(SOL_IP) && defined(IP_TOS)	470	set_tos (ipv4_fd, ipv4_tos, tos);
294	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
295	#endif
296	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	471	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
297		472
298	return true;	473	return true;
299	}	474	}
300		475
…		…
320		495
321	return ~sum;	496	return ~sum;
322	}	497	}
323		498
324	#if ENABLE_ICMP	499	#if ENABLE_ICMP
325	struct icmp_header {
326	u8 type;
327	u8 code;
328	u16 checksum;
329	union {
330	struct {
331	u16 id;
332	u16 sequence;
333	} echo;
334	u32 gateway;
335	struct {
336	u16 unused;
337	u16 mtu;
338	} frag;
339	} un;
340	};
341
342	bool	500	bool
343	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	501	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
344	{	502	{
345	#if defined(SOL_IP) && defined(IP_TOS)
346	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
347	#endif
348
349	pkt->unshift_hdr (4);	503	pkt->unshift_hdr (4);
350		504
351	icmp_header hdr = (icmp_header )&((*pkt)[0]);	505	icmp_header hdr = (icmp_header )&((*pkt)[0]);
352	hdr->type = ::conf.icmp_type;	506	hdr->type = ::conf.icmp_type;
353	hdr->code = 255;	507	hdr->code = 255;
354	hdr->checksum = 0;	508	hdr->checksum = 0;
355	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	509	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
356		510
		511	set_tos (icmpv4_fd, icmpv4_tos, tos);
357	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	512	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
358		513
359	return true;	514	return true;
360	}	515	}
361	#endif	516	#endif
362		517
363	bool	518	bool
364	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	519	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
365	{	520	{
366	#if defined(SOL_IP) && defined(IP_TOS)	521	set_tos (udpv4_fd, udpv4_tos, tos);
367	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
368	#endif
369	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	522	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
370		523
371	return true;	524	return true;
		525	}
		526
		527	void
		528	vpn::inject_data_packet (tap_packet *pkt, int dst)
		529	{
		530	if (dst)
		531	{
		532	// unicast
		533	if (dst != THISNODE->id)
		534	conns[dst - 1]->inject_data_packet (pkt);
		535	}
		536	else
		537	{
		538	// broadcast, this is ugly, but due to the security policy
		539	// we have to connect to all hosts...
		540	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		541	if ((*c)->conf != THISNODE)
		542	(*c)->inject_data_packet (pkt);
		543	}
372	}	544	}
373		545
374	void	546	void
375	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	547	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
376	{	548	{
377	unsigned int src = pkt->src ();	549	unsigned int src = pkt->src ();
378	unsigned int dst = pkt->dst ();	550	unsigned int dst = pkt->dst ();
379		551
380	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	552	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
381	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	553	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
382		554
383	if (src == 0 \|\| src > conns.size ()	555	if (src == 0 \|\| src > conns.size ()
384	\|\| dst > conns.size ()	556	\|\| dst > conns.size ()
385	\|\| pkt->typ () >= vpn_packet::PT_MAX)	557	\|\| pkt->typ () >= vpn_packet::PT_MAX)
386	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	558	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
387	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
388	else if (dst > conns.size ())
389	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
390	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	559	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
391	else	560	else
392	{	561	{
393	connection *c = conns[src - 1];	562	connection *c = conns[src - 1];
394		563
395	if (dst == 0)	564	if (dst == 0)
396	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	565	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
397	c->conf->nodename, (const char *)rsi);	566	c->conf->nodename, (const char *)rsi);
398	else if (dst != 0 && dst != THISNODE->id)	567	else if (dst != THISNODE->id)
399	{	568	{
400	if (THISNODE->routerprio)	569	if (THISNODE->routerprio)
401	// the tos setting gets lost here. who cares.	570	// the tos setting gets lost here. who cares.
402	conns[dst - 1]->inject_vpn_packet (pkt);	571	conns[dst - 1]->inject_vpn_packet (pkt);
403	else	572	else
404	slog (L_WARN,	573	slog (L_WARN,
405	_("%s(%s): forwarding request (=> %s), but we are no router"),	574	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
406	c->conf->nodename, (const char *)rsi,	575	c->conf->nodename, (const char *)rsi,
407	conns[dst - 1]->conf->nodename);	576	conns[dst - 1]->conf->nodename);
408	}	577	}
409	else	578	else
410	c->recv_vpn_packet (pkt, rsi);	579	c->recv_vpn_packet (pkt, rsi);
411	}	580	}
412	}	581	}
413		582
414	void	583	bool
		584	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		585	{
		586	switch (si.prot)
		587	{
		588	case PROT_IPv4:
		589	return send_ipv4_packet (pkt, si, tos);
		590
		591	case PROT_UDPv4:
		592	return send_udpv4_packet (pkt, si, tos);
		593
		594	#if ENABLE_TCP
		595	case PROT_TCPv4:
		596	return send_tcpv4_packet (pkt, si, tos);
		597	#endif
		598	#if ENABLE_ICMP
		599	case PROT_ICMPv4:
		600	return send_icmpv4_packet (pkt, si, tos);
		601	#endif
		602	#if ENABLE_DNS
		603	case PROT_DNSv4:
		604	return send_dnsv4_packet (pkt, si, tos);
		605	#endif
		606	default:
		607	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		608	}
		609
		610	return false;
		611	}
		612
		613	inline void
415	vpn::ipv4_ev (io_watcher &w, short revents)	614	vpn::ipv4_ev (ev::io &w, int revents)
416	{	615	{
417	if (revents & (POLLIN \| POLLERR))	616	if (revents & EV_READ)
418	{	617	{
419	vpn_packet *pkt = new vpn_packet;	618	vpn_packet *pkt = new vpn_packet;
420	struct sockaddr_in sa;	619	struct sockaddr_in sa;
421	socklen_t sa_len = sizeof (sa);	620	socklen_t sa_len = sizeof (sa);
422	int len;	621	int len;
…		…
427		626
428	if (len > 0)	627	if (len > 0)
429	{	628	{
430	pkt->len = len;	629	pkt->len = len;
431		630
432	// raw sockets deliver the ipv4, but don't expect it on sends	631	// raw sockets deliver the ipv4 header, but don't expect it on sends
433	// this is slow, but...	632	pkt->skip_hdr (pkt->ipv4_hdr_len ());
434	pkt->skip_hdr (IP_OVERHEAD);
435		633
436	recv_vpn_packet (pkt, si);	634	recv_vpn_packet (pkt, si);
437	}	635	}
438	else	636	else
439	{	637	{
440	// probably ECONNRESET or somesuch	638	// probably ECONNRESET or somesuch
441	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	639	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
442	}	640	}
443		641
444	delete pkt;	642	delete pkt;
445	}	643	}
446	else if (revents & POLLHUP)
447	{
448	// this cannot ;) happen on udp sockets
449	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
450	exit (1);
451	}
452	else	644	else
453	{	645	{
454	slog (L_ERR,	646	slog (L_ERR,
455	_("FATAL: unknown revents %08x in socket, terminating\n"),	647	_("FATAL: unknown revents %08x in socket, exiting.\n"),
456	revents);	648	revents);
457	exit (1);	649	exit (EXIT_FAILURE);
458	}	650	}
459	}	651	}
460		652
461	#if ENABLE_ICMP	653	#if ENABLE_ICMP
462	void	654	inline void
463	vpn::icmpv4_ev (io_watcher &w, short revents)	655	vpn::icmpv4_ev (ev::io &w, int revents)
464	{	656	{
465	if (revents & (POLLIN \| POLLERR))	657	if (revents & EV_READ)
466	{	658	{
467	vpn_packet *pkt = new vpn_packet;	659	vpn_packet *pkt = new vpn_packet;
468	struct sockaddr_in sa;	660	struct sockaddr_in sa;
469	socklen_t sa_len = sizeof (sa);	661	socklen_t sa_len = sizeof (sa);
470	int len;	662	int len;
…		…
482	if (hdr->type == ::conf.icmp_type	674	if (hdr->type == ::conf.icmp_type
483	&& hdr->code == 255)	675	&& hdr->code == 255)
484	{	676	{
485	// raw sockets deliver the ipv4, but don't expect it on sends	677	// raw sockets deliver the ipv4, but don't expect it on sends
486	// this is slow, but...	678	// this is slow, but...
487	pkt->skip_hdr (ICMP_OVERHEAD);	679	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
488		680
489	recv_vpn_packet (pkt, si);	681	recv_vpn_packet (pkt, si);
490	}	682	}
491	}	683	}
492	else	684	else
493	{	685	{
494	// probably ECONNRESET or somesuch	686	// probably ECONNRESET or somesuch
495	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	687	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
496	}	688	}
497		689
498	delete pkt;	690	delete pkt;
499	}	691	}
500	else if (revents & POLLHUP)
501	{
502	// this cannot ;) happen on udp sockets
503	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
504	exit (1);
505	}
506	else	692	else
507	{	693	{
508	slog (L_ERR,	694	slog (L_ERR,
509	_("FATAL: unknown revents %08x in socket, terminating\n"),	695	_("FATAL: unknown revents %08x in socket, exiting.\n"),
510	revents);	696	revents);
511	exit (1);	697	exit (EXIT_FAILURE);
512	}	698	}
513	}	699	}
514	#endif	700	#endif
515		701
516	void	702	inline void
517	vpn::udpv4_ev (io_watcher &w, short revents)	703	vpn::udpv4_ev (ev::io &w, int revents)
518	{	704	{
519	if (revents & (POLLIN \| POLLERR))	705	if (revents & EV_READ)
520	{	706	{
521	vpn_packet *pkt = new vpn_packet;	707	vpn_packet *pkt = new vpn_packet;
522	struct sockaddr_in sa;	708	struct sockaddr_in sa;
523	socklen_t sa_len = sizeof (sa);	709	socklen_t sa_len = sizeof (sa);
524	int len;	710	int len;
…		…
534	recv_vpn_packet (pkt, si);	720	recv_vpn_packet (pkt, si);
535	}	721	}
536	else	722	else
537	{	723	{
538	// probably ECONNRESET or somesuch	724	// probably ECONNRESET or somesuch
539	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	725	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
540	}	726	}
541		727
542	delete pkt;	728	delete pkt;
543	}	729	}
544	else if (revents & POLLHUP)
545	{
546	// this cannot ;) happen on udp sockets
547	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
548	exit (1);
549	}
550	else	730	else
551	{	731	{
552	slog (L_ERR,	732	slog (L_ERR,
553	_("FATAL: unknown revents %08x in socket, terminating\n"),	733	_("FATAL: unknown revents %08x in socket, exiting.\n"),
554	revents);	734	revents);
555	exit (1);	735	exit (EXIT_FAILURE);
556	}	736	}
557	}	737	}
558		738
559	void	739	inline void
560	vpn::tap_ev (io_watcher &w, short revents)	740	vpn::tap_ev (ev::io &w, int revents)
561	{	741	{
562	if (revents & POLLIN)	742	if (revents & EV_READ)
563	{	743	{
564	/* process data */	744	/* process data */
565	tap_packet *pkt;	745	tap_packet *pkt;
566		746
567	pkt = tap->recv ();	747	pkt = tap->recv ();
568		748
		749	if (!pkt)
		750	return;
		751
		752	if (pkt->len > 14)
		753	{
569	int dst = mac2id (pkt->dst);	754	int dst = mac2id (pkt->dst);
570	int src = mac2id (pkt->src);	755	int src = mac2id (pkt->src);
571		756
572	if (src != THISNODE->id)	757	if (src != THISNODE->id)
573	{
574	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));
575	exit (1);
576	}
577
578	if (dst == THISNODE->id)
579	{
580	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
581	exit (1);
582	}
583
584	if (dst > conns.size ())
585	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
586	else
587	{
588	if (dst)
589	{	758	{
590	// unicast	759	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
591	if (dst != THISNODE->id)	760	exit (EXIT_FAILURE);
592	conns[dst - 1]->inject_data_packet (pkt);
593	}	761	}
		762
		763	if (dst == THISNODE->id)
		764	{
		765	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		766	exit (EXIT_FAILURE);
		767	}
		768
		769	if (dst > conns.size ())
		770	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
594	else	771	else
595	{
596	// broadcast, this is ugly, but due to the security policy
597	// we have to connect to all hosts...
598	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
599	if ((*c)->conf != THISNODE)
600	(*c)->inject_data_packet (pkt);	772	inject_data_packet (pkt, dst);
601	}
602	}	773	}
603		774
604	delete pkt;	775	delete pkt;
605	}
606	else if (revents & (POLLHUP \| POLLERR))
607	{
608	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
609	exit (1);
610	}	776	}
611	else	777	else
612	abort ();	778	abort ();
613	}	779	}
614		780
615	void	781	inline void
616	vpn::event_cb (time_watcher &w)	782	vpn::event_cb (ev::timer &w, int)
617	{	783	{
618	if (events)	784	if (events)
619	{	785	{
620	if (events & EVENT_SHUTDOWN)	786	if (events & EVENT_SHUTDOWN)
621	{	787	{
622	slog (L_INFO, _("preparing shutdown..."));	788	slog (L_INFO, _("preparing shutdown..."));
623		789
624	shutdown_all ();	790	shutdown_all ();
625
626	remove_pid (pidfilename);	791	remove_pid (conf.pidfilename);
627
628	slog (L_INFO, _("terminating"));	792	slog (L_INFO, _("exiting."));
629		793	exit (EXIT_SUCCESS);
630	exit (0);
631	}	794	}
632		795
633	if (events & EVENT_RECONNECT)	796	if (events & EVENT_RECONNECT)
634	{	797	{
635	slog (L_INFO, _("forced reconnect"));	798	slog (L_INFO, _("forced reconnect."));
636		799
637	reconnect_all ();	800	reconnect_all ();
638	}	801	}
639		802
640	events = 0;	803	events = 0;
641	}	804	}
642
643	w.at = TSTAMP_CANCEL;
644	}	805	}
645		806
646	void	807	void
647	vpn::shutdown_all ()	808	vpn::shutdown_all ()
648	{	809	{
…		…
658		819
659	conns.clear ();	820	conns.clear ();
660		821
661	connection_init ();	822	connection_init ();
662		823
663	for (configuration::node_vector::iterator i = conf.nodes.begin ();	824	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
664	i != conf.nodes.end (); ++i)	825	conns.push_back (new connection (this, *i));
665	{
666	connection *conn = new connection (this);
667		826
668	conn->conf = *i;	827	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
669	conns.push_back (conn);
670
671	conn->establish_connection ();	828	(*c)->establish_connection ();
672	}
673	}	829	}
674		830
675	connection *vpn::find_router ()	831	bool
		832	vpn::can_direct (conf_node src, conf_node dst) const
676	{	833	{
677	u32 prio = 1;	834	return src != dst
		835	&& src->may_direct (dst)
		836	&& dst->may_direct (src)
		837	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		838	\|\| (src->protocols & dst->connectable_protocols ()));
		839	}
		840
		841	// only works for indirect and routed connections: find a router
		842	// from THISNODE to dst
		843	connection *
		844	vpn::find_router_for (const connection *dst)
		845	{
678	connection *router = 0;	846	connection *router = 0;
679		847
		848	// first try to find a router with a direct connection, route there
		849	// regardless of any other considerations.
		850	{
		851	u32 prio = 1;
		852
		853	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		854	{
		855	connection c = i;
		856
		857	if (c->conf->routerprio > prio
		858	&& c->conf != THISNODE
		859	&& can_direct (c->conf, dst->conf)
		860	&& c->ictx && c->octx)
		861	{
		862	prio = c->conf->routerprio;
		863	router = c;
		864	}
		865	}
		866	}
		867
		868	if (router)
		869	return router;
		870
		871	// second try find the router with the highest priority, higher than ours
		872	{
		873	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		874
		875	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		876	{
		877	connection c = i;
		878
		879	if (c->conf->routerprio > prio
		880	&& c != dst
		881	&& c->conf != THISNODE
		882	&& c->ictx && c->octx)
		883	{
		884	prio = c->conf->routerprio;
		885	router = c;
		886	}
		887	}
		888	}
		889
		890	return router;
		891	}
		892
		893	void
		894	vpn::connection_established (connection *c)
		895	{
680	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	896	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
681	{	897	{
682	connection c = i;	898	connection o = i;
683		899
684	if (c->conf->routerprio > prio	900	if (!o->is_direct
685	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	901	&& o->si.valid ()
686	&& c->ictx && c->octx	902	&& c->si != o->si
687	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	903	&& c == find_router_for (o))
688	{
689	prio = c->conf->routerprio;
690	router = c;
691	}	904	{
		905	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		906	o->conf->nodename, c->conf->nodename);
		907	o->rekey ();
		908	}
692	}	909	}
693
694	return router;
695	}	910	}
696		911
		912	void
697	void vpn::send_connect_request (int id)	913	vpn::send_connect_request (connection *c)
698	{	914	{
699	connection *c = find_router ();	915	connection *r = find_router_for (c);
700		916
701	if (c)	917	if (r)
		918	{
		919	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		920	c->conf->nodename, r->conf->nodename);
702	c->send_connect_request (id);	921	r->send_connect_request (c->conf->id);
		922	}
703	else	923	else
704	// no router found, aggressively connect to all routers	924	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
705	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	925	c->conf->nodename);
706	if ((i)->conf->routerprio && (i)->conf != THISNODE)
707	(*i)->establish_connection ();
708	}	926	}
709		927
710	void	928	void
711	connection::dump_status ()	929	connection::dump_status ()
712	{	930	{
713	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	931	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
714	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	932	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
715	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	933	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
716	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	934	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
717	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	935	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
718	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
719	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
720	}	936	}
721		937
722	void	938	void
723	vpn::dump_status ()	939	vpn::dump_status ()
724	{	940	{
725	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	941	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
726		942
727	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	943	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
728	(*c)->dump_status ();	944	(*c)->dump_status ();
729		945
730	slog (L_NOTICE, _("END status dump"));	946	slog (L_NOTICE, _("END status dump"));
731	}	947	}
732		948
733	vpn::vpn (void)	949	vpn::vpn (void)
		950	{
734	: event (this, &vpn::event_cb)	951	event .set<vpn, &vpn::event_cb > (this);
735	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	952	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
736	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	953	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
737	#if ENABLE_TCP	954	#if ENABLE_TCP
738	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	955	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
739	#endif	956	#endif
740	#if ENABLE_ICMP	957	#if ENABLE_ICMP
741	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	958	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
742	#endif	959	#endif
743	, tap_ev_watcher (this, &vpn::tap_ev)	960	#if ENABLE_DNS
744	{	961	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		962	#endif
		963	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
745	}	964	}
746		965
747	vpn::~vpn ()	966	vpn::~vpn ()
748	{	967	{
749	}	968	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs. Revision 1.65 by root, Tue Jul 16 16:44:37 2013 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs.
Revision 1.65 by root, Tue Jul 16 16:44:37 2013 UTC