[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 1.68 by root, Wed Jul 15 23:04:06 2015 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
89	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	95	conns [THISNODE->id - 1]->script_init_env ("");
		96
		97	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		98	{
		99	char ext[16];
		100	snprintf (ext, 16, "_%d", (*c)->conf->id);
		101	(*c)->script_init_env (ext);
		102	}
		103	}
		104
		105	inline const char *
		106	vpn::script_if_init ()
		107	{
		108	script_init_env ();
		109
		110	return tap->if_up ();
		111	}
		112
		113	inline const char *
		114	vpn::script_if_up ()
		115	{
		116	script_init_env ();
		117
		118	return conf.config_filename (::conf.script_if_up, "if-up");
		119	}
		120
		121	int
		122	vpn::setup_socket (u8 prot, int family, int type, int proto)
		123	{
		124	int fd = socket (family, type, proto);
		125
		126	if (fd < 0)
		127	{
		128	slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno));
		129	return fd;
		130	}
		131
		132	fcntl (fd, F_SETFL, O_NONBLOCK);
		133	fcntl (fd, F_SETFD, FD_CLOEXEC);
		134
		135	#ifdef SO_MARK
		136	if (::conf.nfmark)
		137	if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark))
		138	slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno));
		139	#endif
		140
		141	return fd;
90	}	142	}
91		143
92	int	144	int
93	vpn::setup ()	145	vpn::setup ()
94	{	146	{
		147	int success = 0;
		148
		149	ipv4_tos = -1;
95	ipv4_fd = -1;	150	ipv4_fd = -1;
96		151
97	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	152	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
98	{	153	{
99	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	154	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
100		155
101	if (ipv4_fd < 0)	156	if (ipv4_fd < 0)
102	return -1;	157	return -1;
103
104	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
105		158
106	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	159	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
107	// this I really consider a linux bug. I am neither connected	160	// this I really consider a linux bug. I am neither connected
108	// nor do I fragment myself. Linux still sets DF and doesn't	161	// nor do I fragment myself. Linux still sets DF and doesn't
109	// fragment for me sometimes.	162	// fragment for me sometimes.
115		168
116	sockinfo si (THISNODE, PROT_IPv4);	169	sockinfo si (THISNODE, PROT_IPv4);
117		170
118	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	171	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
119	{	172	{
120	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	173	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
121	exit (1);	174	return -1;
122	}	175	}
123		176
124	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	177	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		178	++success;
125	}	179	}
		180	else
		181	THISNODE->protocols &= ~PROT_IPv4;
126		182
		183	udpv4_tos = -1;
127	udpv4_fd = -1;	184	udpv4_fd = -1;
128		185
129	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	186	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
130	{	187	{
131	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	188	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
132		189
133	if (udpv4_fd < 0)	190	if (udpv4_fd < 0)
134	return -1;	191	return -1;
135
136	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
137		192
138	// standard daemon practise...	193	// standard daemon practise...
139	{	194	{
140	int oval = 1;	195	int oval = 1;
141	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	196	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
153		208
154	sockinfo si (THISNODE, PROT_UDPv4);	209	sockinfo si (THISNODE, PROT_UDPv4);
155		210
156	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	211	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
157	{	212	{
158	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	213	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
159	exit (1);	214	return -1;
160	}	215	}
161		216
162	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	217	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		218	++success;
163	}	219	}
		220	else
		221	THISNODE->protocols &= ~PROT_UDPv4;
164		222
		223	icmpv4_tos = -1;
165	icmpv4_fd = -1;	224	icmpv4_fd = -1;
166		225
167	#if ENABLE_ICMP	226	#if ENABLE_ICMP
168	if (THISNODE->protocols & PROT_ICMPv4)	227	if (THISNODE->protocols & PROT_ICMPv4)
169	{	228	{
170	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	229	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
171		230
172	if (icmpv4_fd < 0)	231	if (icmpv4_fd < 0)
173	return -1;	232	return -1;
174
175	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
176		233
177	#ifdef ICMP_FILTER	234	#ifdef ICMP_FILTER
178	{	235	{
179	icmp_filter oval;	236	icmp_filter oval;
180	oval.data = 0xffffffff;	237	oval.data = 0xffffffff;
…		…
189	// this I really consider a linux bug. I am neither connected	246	// this I really consider a linux bug. I am neither connected
190	// nor do I fragment myself. Linux still sets DF and doesn't	247	// nor do I fragment myself. Linux still sets DF and doesn't
191	// fragment for me sometimes.	248	// fragment for me sometimes.
192	{	249	{
193	int oval = IP_PMTUDISC_DONT;	250	int oval = IP_PMTUDISC_DONT;
194	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	251	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
195	}	252	}
196	#endif	253	#endif
197		254
198	sockinfo si (THISNODE, PROT_ICMPv4);	255	sockinfo si (THISNODE, PROT_ICMPv4);
199		256
200	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	257	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
201	{	258	{
202	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	259	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
203	exit (1);	260	return -1;
204	}	261	}
205		262
206	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	263	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		264	++success;
207	}	265	}
208	#endif	266	#endif
209		267
210	tcpv4_fd = -1;	268	tcpv4_fd = -1;
211		269
212	#if ENABLE_TCP	270	#if ENABLE_TCP
213	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	271	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
214	{	272	{
215	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	273	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
216		274
217	if (tcpv4_fd < 0)	275	if (tcpv4_fd < 0)
218	return -1;	276	return -1;
219		277
220	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
221
222	// standard daemon practise...	278	// standard daemon practise...
223	{	279	{
224	int oval = 1;	280	int oval = 1;
225	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	281	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
226	}	282	}
227		283
228	sockinfo si (THISNODE, PROT_TCPv4);	284	sockinfo si (THISNODE, PROT_TCPv4);
229		285
230	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	286	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
231	{	287	{
232	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	288	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
233	exit (1);	289	return -1;
234	}	290	}
235		291
236	if (listen (tcpv4_fd, 5))	292	if (listen (tcpv4_fd, 5))
237	{	293	{
238	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	294	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
239	exit (1);	295	return -1;
		296	}
		297
		298	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		299	++success;
		300	}
		301	else
		302	THISNODE->protocols &= ~PROT_TCPv4;
		303	#endif
		304
		305	dnsv4_tos = -1;
		306	dnsv4_fd = -1;
		307
		308	#if ENABLE_DNS
		309	if (THISNODE->protocols & PROT_DNSv4)
		310	{
		311	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		312
		313	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		314
		315	if (dnsv4_fd < 0)
		316	return -1;
		317
		318	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		319	// this I really consider a linux bug. I am neither connected
		320	// nor do I fragment myself. Linux still sets DF and doesn't
		321	// fragment for me sometimes.
		322	{
		323	int oval = IP_PMTUDISC_DONT;
		324	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
240	}	325	}
241
242	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
243	}
244	#endif	326	# endif
		327
		328	// standard daemon practise...
		329	{
		330	int oval = 1;
		331	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		332	}
		333
		334	sockinfo si (THISNODE->dns_hostname,
		335	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		336	PROT_DNSv4);
		337
		338	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		339	{
		340	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		341	return -1;
		342	}
		343
		344	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		345	++success;
		346	}
		347	#endif
		348
		349	/////////////////////////////////////////////////////////////////////////////
		350
		351	if (!success)
		352	{
		353	slog (L_ERR, _("no protocols enabled."));
		354	return -1;
		355	}
		356
		357	reconnect_all ();
		358
		359	/////////////////////////////////////////////////////////////////////////////
245		360
246	tap = new tap_device ();	361	tap = new tap_device ();
247	if (!tap) //D this, of course, never catches	362	if (!tap) //D this, of course, never catches
248	{	363	{
249	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	364	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
250	exit (1);	365	return -1;
251	}	366	}
252		367
253	run_script (run_script_cb (this, &vpn::script_if_up), true);	368	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
254		369
		370	run_script_cb cb;
		371	cb.set<vpn, &vpn::script_if_init> (this);
		372
		373	if (tap->if_up () &&
		374	!run_script (cb, true))
		375	{
		376	slog (L_ERR, _("interface initialization command '%s' failed."),
		377	tap->if_up ());
		378	return -1;
		379	}
		380
		381	cb.set<vpn, &vpn::script_if_up> (this);
		382	if (!run_script (cb, true))
		383	{
		384	slog (L_ERR, _("if-up command execution failed."));
		385	return -1;
		386	}
		387
255	tap_ev_watcher.start (tap->fd, POLLIN);	388	tap_ev_watcher.start (tap->fd, EV_READ);
256
257	reconnect_all ();
258		389
259	return 0;	390	return 0;
260	}	391	}
261		392
262	// send a vpn packet out to other hosts
263	bool	393	bool
264	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	394	vpn::drop_privileges ()
265	{	395	{
266	switch (si.prot)	396	if (::conf.change_root)
		397	{
		398	if (!strcmp (::conf.change_root, "/"))
		399	{
		400	char dir [L_tmpnam];
		401	if (!tmpnam (dir))
		402	{
		403	slog (L_CRIT, _("unable to create anonymous root path."));
		404	return false;
		405	}
		406
		407	if (mkdir (dir, 0700))
		408	{
		409	slog (L_CRIT, _("unable to create anonymous root directory."));
		410	return false;
		411	}
		412
		413	if (chdir (dir))
		414	{
		415	slog (L_CRIT, _("unable to change to anonymous root directory."));
		416	return false;
		417	}
		418
		419	if (rmdir (dir))
		420	slog (L_ERR, _("unable to remove anonymous root directory, continuing."));
		421	}
		422	else
		423	{
		424	if (chdir (::conf.change_root))
		425	{
		426	slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root);
		427	return false;
		428	}
		429	}
		430
		431	if (chroot ("."))
		432	{
		433	slog (L_CRIT, _("unable to set new root directory."));
		434	return false;
		435	}
		436
		437	if (chdir ("/"))
		438	{
		439	slog (L_CRIT, _("unable to set cwd to new root directory."));
		440	return false;
		441	}
		442	}
		443
		444	if (::conf.change_gid)
		445	if (setgid (::conf.change_gid))
267	{	446	{
268	case PROT_IPv4:	447	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;	448	return false;
287	}	449	}
		450
		451	if (::conf.change_uid)
		452	if (setuid (::conf.change_uid))
		453	{
		454	slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid);
		455	return false;
		456	}
		457
		458	return true;
288	}	459	}
289		460
290	bool	461	bool
291	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	462	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
292	{	463	{
293	#if defined(SOL_IP) && defined(IP_TOS)	464	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 ());	465	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
297		466
298	return true;	467	return true;
299	}	468	}
300		469
…		…
320		489
321	return ~sum;	490	return ~sum;
322	}	491	}
323		492
324	#if ENABLE_ICMP	493	#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	494	bool
343	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	495	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
344	{	496	{
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);	497	pkt->unshift_hdr (4);
350		498
351	icmp_header hdr = (icmp_header )&((*pkt)[0]);	499	icmp_header hdr = (icmp_header )&((*pkt)[0]);
352	hdr->type = ::conf.icmp_type;	500	hdr->type = ::conf.icmp_type;
353	hdr->code = 255;	501	hdr->code = 255;
354	hdr->checksum = 0;	502	hdr->checksum = 0;
355	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	503	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
356		504
		505	set_tos (icmpv4_fd, icmpv4_tos, tos);
357	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	506	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
358		507
359	return true;	508	return true;
360	}	509	}
361	#endif	510	#endif
362		511
363	bool	512	bool
364	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	513	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
365	{	514	{
366	#if defined(SOL_IP) && defined(IP_TOS)	515	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 ());	516	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
370		517
371	return true;	518	return true;
		519	}
		520
		521	void
		522	vpn::inject_data_packet (tap_packet *pkt, int dst)
		523	{
		524	if (dst)
		525	{
		526	// unicast
		527	if (dst != THISNODE->id)
		528	conns[dst - 1]->inject_data_packet (pkt);
		529	}
		530	else
		531	{
		532	// broadcast, this is ugly, but due to the security policy
		533	// we have to connect to all hosts...
		534	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		535	if ((*c)->conf != THISNODE)
		536	(*c)->inject_data_packet (pkt);
		537	}
372	}	538	}
373		539
374	void	540	void
375	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	541	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
376	{	542	{
377	unsigned int src = pkt->src ();	543	unsigned int src = pkt->src ();
378	unsigned int dst = pkt->dst ();	544	unsigned int dst = pkt->dst ();
379		545
380	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	546	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
381	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	547	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
382		548
383	if (src == 0 \|\| src > conns.size ()	549	if (src == 0 \|\| src > conns.size ()
384	\|\| dst > conns.size ()	550	\|\| dst > conns.size ()
385	\|\| pkt->typ () >= vpn_packet::PT_MAX)	551	\|\| pkt->typ () >= vpn_packet::PT_MAX)
386	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	552	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
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 ());	553	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
391	else	554	else
392	{	555	{
393	connection *c = conns[src - 1];	556	connection *c = conns[src - 1];
394		557
395	if (dst == 0)	558	if (dst == 0)
396	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	559	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
397	c->conf->nodename, (const char *)rsi);	560	c->conf->nodename, (const char *)rsi);
398	else if (dst != 0 && dst != THISNODE->id)	561	else if (dst != THISNODE->id)
399	{	562	{
400	if (THISNODE->routerprio)	563	if (THISNODE->routerprio)
401	// the tos setting gets lost here. who cares.	564	// the tos setting gets lost here. who cares.
402	conns[dst - 1]->inject_vpn_packet (pkt);	565	conns[dst - 1]->inject_vpn_packet (pkt);
403	else	566	else
404	slog (L_WARN,	567	slog (L_WARN,
405	_("%s(%s): forwarding request (=> %s), but we are no router"),	568	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
406	c->conf->nodename, (const char *)rsi,	569	c->conf->nodename, (const char *)rsi,
407	conns[dst - 1]->conf->nodename);	570	conns[dst - 1]->conf->nodename);
408	}	571	}
409	else	572	else
410	c->recv_vpn_packet (pkt, rsi);	573	c->recv_vpn_packet (pkt, rsi);
411	}	574	}
412	}	575	}
413		576
414	void	577	bool
		578	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		579	{
		580	switch (si.prot)
		581	{
		582	case PROT_IPv4:
		583	return send_ipv4_packet (pkt, si, tos);
		584
		585	case PROT_UDPv4:
		586	return send_udpv4_packet (pkt, si, tos);
		587
		588	#if ENABLE_TCP
		589	case PROT_TCPv4:
		590	return send_tcpv4_packet (pkt, si, tos);
		591	#endif
		592	#if ENABLE_ICMP
		593	case PROT_ICMPv4:
		594	return send_icmpv4_packet (pkt, si, tos);
		595	#endif
		596	#if ENABLE_DNS
		597	case PROT_DNSv4:
		598	return send_dnsv4_packet (pkt, si, tos);
		599	#endif
		600	default:
		601	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		602	}
		603
		604	return false;
		605	}
		606
		607	inline void
415	vpn::ipv4_ev (io_watcher &w, short revents)	608	vpn::ipv4_ev (ev::io &w, int revents)
416	{	609	{
417	if (revents & (POLLIN \| POLLERR))	610	if (revents & EV_READ)
418	{	611	{
419	vpn_packet *pkt = new vpn_packet;	612	vpn_packet *pkt = new vpn_packet;
420	struct sockaddr_in sa;	613	struct sockaddr_in sa;
421	socklen_t sa_len = sizeof (sa);	614	socklen_t sa_len = sizeof (sa);
422	int len;	615	int len;
…		…
427		620
428	if (len > 0)	621	if (len > 0)
429	{	622	{
430	pkt->len = len;	623	pkt->len = len;
431		624
432	// raw sockets deliver the ipv4, but don't expect it on sends	625	// raw sockets deliver the ipv4 header, but don't expect it on sends
433	// this is slow, but...	626	pkt->skip_hdr (pkt->ipv4_hdr_len ());
434	pkt->skip_hdr (IP_OVERHEAD);
435		627
436	recv_vpn_packet (pkt, si);	628	recv_vpn_packet (pkt, si);
437	}	629	}
438	else	630	else
439	{	631	{
440	// probably ECONNRESET or somesuch	632	// probably ECONNRESET or somesuch
441	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	633	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
442	}	634	}
443		635
444	delete pkt;	636	delete pkt;
445	}	637	}
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	638	else
453	{	639	{
454	slog (L_ERR,	640	slog (L_ERR,
455	_("FATAL: unknown revents %08x in socket, terminating\n"),	641	_("FATAL: unknown revents %08x in socket, exiting.\n"),
456	revents);	642	revents);
457	exit (1);	643	exit (EXIT_FAILURE);
458	}	644	}
459	}	645	}
460		646
461	#if ENABLE_ICMP	647	#if ENABLE_ICMP
462	void	648	inline void
463	vpn::icmpv4_ev (io_watcher &w, short revents)	649	vpn::icmpv4_ev (ev::io &w, int revents)
464	{	650	{
465	if (revents & (POLLIN \| POLLERR))	651	if (revents & EV_READ)
466	{	652	{
467	vpn_packet *pkt = new vpn_packet;	653	vpn_packet *pkt = new vpn_packet;
468	struct sockaddr_in sa;	654	struct sockaddr_in sa;
469	socklen_t sa_len = sizeof (sa);	655	socklen_t sa_len = sizeof (sa);
470	int len;	656	int len;
…		…
482	if (hdr->type == ::conf.icmp_type	668	if (hdr->type == ::conf.icmp_type
483	&& hdr->code == 255)	669	&& hdr->code == 255)
484	{	670	{
485	// raw sockets deliver the ipv4, but don't expect it on sends	671	// raw sockets deliver the ipv4, but don't expect it on sends
486	// this is slow, but...	672	// this is slow, but...
487	pkt->skip_hdr (ICMP_OVERHEAD);	673	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
488		674
489	recv_vpn_packet (pkt, si);	675	recv_vpn_packet (pkt, si);
490	}	676	}
491	}	677	}
492	else	678	else
493	{	679	{
494	// probably ECONNRESET or somesuch	680	// probably ECONNRESET or somesuch
495	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	681	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
496	}	682	}
497		683
498	delete pkt;	684	delete pkt;
499	}	685	}
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	686	else
507	{	687	{
508	slog (L_ERR,	688	slog (L_ERR,
509	_("FATAL: unknown revents %08x in socket, terminating\n"),	689	_("FATAL: unknown revents %08x in socket, exiting.\n"),
510	revents);	690	revents);
511	exit (1);	691	exit (EXIT_FAILURE);
512	}	692	}
513	}	693	}
514	#endif	694	#endif
515		695
516	void	696	inline void
517	vpn::udpv4_ev (io_watcher &w, short revents)	697	vpn::udpv4_ev (ev::io &w, int revents)
518	{	698	{
519	if (revents & (POLLIN \| POLLERR))	699	if (revents & EV_READ)
520	{	700	{
521	vpn_packet *pkt = new vpn_packet;	701	vpn_packet *pkt = new vpn_packet;
522	struct sockaddr_in sa;	702	struct sockaddr_in sa;
523	socklen_t sa_len = sizeof (sa);	703	socklen_t sa_len = sizeof (sa);
524	int len;	704	int len;
…		…
534	recv_vpn_packet (pkt, si);	714	recv_vpn_packet (pkt, si);
535	}	715	}
536	else	716	else
537	{	717	{
538	// probably ECONNRESET or somesuch	718	// probably ECONNRESET or somesuch
539	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	719	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
540	}	720	}
541		721
542	delete pkt;	722	delete pkt;
543	}	723	}
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	724	else
551	{	725	{
552	slog (L_ERR,	726	slog (L_ERR,
553	_("FATAL: unknown revents %08x in socket, terminating\n"),	727	_("FATAL: unknown revents %08x in socket, exiting.\n"),
554	revents);	728	revents);
555	exit (1);	729	exit (EXIT_FAILURE);
556	}	730	}
557	}	731	}
558		732
559	void	733	inline void
560	vpn::tap_ev (io_watcher &w, short revents)	734	vpn::tap_ev (ev::io &w, int revents)
561	{	735	{
562	if (revents & POLLIN)	736	if (revents & EV_READ)
563	{	737	{
564	/* process data */	738	/* process data */
565	tap_packet *pkt;	739	tap_packet *pkt;
566		740
567	pkt = tap->recv ();	741	pkt = tap->recv ();
568		742
		743	if (!pkt)
		744	return;
		745
		746	if (pkt->len > 14)
		747	{
569	int dst = mac2id (pkt->dst);	748	int dst = mac2id (pkt->dst);
570	int src = mac2id (pkt->src);	749	int src = mac2id (pkt->src);
571		750
572	if (src != THISNODE->id)	751	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	{	752	{
590	// unicast	753	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
591	if (dst != THISNODE->id)	754	exit (EXIT_FAILURE);
592	conns[dst - 1]->inject_data_packet (pkt);
593	}	755	}
		756
		757	if (dst == THISNODE->id)
		758	{
		759	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		760	exit (EXIT_FAILURE);
		761	}
		762
		763	if (dst > conns.size ())
		764	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
594	else	765	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);	766	inject_data_packet (pkt, dst);
601	}
602	}	767	}
603		768
604	delete pkt;	769	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	}	770	}
611	else	771	else
612	abort ();	772	abort ();
613	}	773	}
614		774
615	void	775	inline void
616	vpn::event_cb (time_watcher &w)	776	vpn::event_cb (ev::timer &w, int)
617	{	777	{
618	if (events)	778	if (events)
619	{	779	{
620	if (events & EVENT_SHUTDOWN)	780	if (events & EVENT_SHUTDOWN)
621	{	781	{
622	slog (L_INFO, _("preparing shutdown..."));	782	slog (L_INFO, _("preparing shutdown..."));
623		783
624	shutdown_all ();	784	shutdown_all ();
625
626	remove_pid (pidfilename);	785	remove_pid (conf.pidfilename);
627
628	slog (L_INFO, _("terminating"));	786	slog (L_INFO, _("exiting."));
629		787	exit (EXIT_SUCCESS);
630	exit (0);
631	}	788	}
632		789
633	if (events & EVENT_RECONNECT)	790	if (events & EVENT_RECONNECT)
634	{	791	{
635	slog (L_INFO, _("forced reconnect"));	792	slog (L_INFO, _("forced reconnect."));
636		793
637	reconnect_all ();	794	reconnect_all ();
638	}	795	}
639		796
640	events = 0;	797	events = 0;
641	}	798	}
642
643	w.at = TSTAMP_CANCEL;
644	}	799	}
645		800
646	void	801	void
647	vpn::shutdown_all ()	802	vpn::shutdown_all ()
648	{	803	{
…		…
658		813
659	conns.clear ();	814	conns.clear ();
660		815
661	connection_init ();	816	connection_init ();
662		817
663	for (configuration::node_vector::iterator i = conf.nodes.begin ();	818	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
664	i != conf.nodes.end (); ++i)	819	conns.push_back (new connection (this, *i));
665	{
666	connection *conn = new connection (this);
667		820
668	conn->conf = *i;	821	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
669	conns.push_back (conn);
670
671	conn->establish_connection ();	822	(*c)->establish_connection ();
672	}
673	}	823	}
674		824
675	connection *vpn::find_router ()	825	bool
		826	vpn::can_direct (conf_node src, conf_node dst) const
676	{	827	{
677	u32 prio = 1;	828	return src != dst
		829	&& src->may_direct (dst)
		830	&& dst->may_direct (src)
		831	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		832	\|\| (src->protocols & dst->connectable_protocols ()));
		833	}
		834
		835	// only works for indirect and routed connections: find a router
		836	// from THISNODE to dst
		837	connection *
		838	vpn::find_router_for (const connection *dst)
		839	{
678	connection *router = 0;	840	connection *router = 0;
679		841
		842	// first try to find a router with a direct connection, route there
		843	// regardless of any other considerations.
		844	{
		845	u32 prio = 1;
		846
		847	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		848	{
		849	connection c = i;
		850
		851	if (c->conf->routerprio > prio
		852	&& c->conf != THISNODE
		853	&& can_direct (c->conf, dst->conf)
		854	&& c->ictx && c->octx)
		855	{
		856	prio = c->conf->routerprio;
		857	router = c;
		858	}
		859	}
		860	}
		861
		862	if (router)
		863	return router;
		864
		865	// second try find the router with the highest priority, higher than ours
		866	{
		867	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		868
		869	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		870	{
		871	connection c = i;
		872
		873	if (c->conf->routerprio > prio
		874	&& c != dst
		875	&& c->conf != THISNODE
		876	&& c->ictx && c->octx)
		877	{
		878	prio = c->conf->routerprio;
		879	router = c;
		880	}
		881	}
		882	}
		883
		884	return router;
		885	}
		886
		887	void
		888	vpn::connection_established (connection *c)
		889	{
680	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	890	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
681	{	891	{
682	connection c = i;	892	connection o = i;
683		893
684	if (c->conf->routerprio > prio	894	if (o->si.valid ()
685	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	895	&& c->si != o->si
686	&& c->ictx && c->octx	896	&& c == find_router_for (o)
687	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	897	&& !can_direct (THISNODE, o->conf))
688	{
689	prio = c->conf->routerprio;
690	router = c;
691	}	898	{
		899	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		900	o->conf->nodename, c->conf->nodename);
		901	o->rekey ();
		902	}
692	}	903	}
693
694	return router;
695	}	904	}
696		905
		906	void
697	void vpn::send_connect_request (int id)	907	vpn::send_connect_request (connection *c)
698	{	908	{
699	connection *c = find_router ();	909	connection *r = find_router_for (c);
700		910
701	if (c)	911	if (r)
		912	{
		913	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		914	c->conf->nodename, r->conf->nodename);
702	c->send_connect_request (id);	915	r->send_connect_request (c->conf->id);
		916	}
703	else	917	else
704	// no router found, aggressively connect to all routers	918	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
705	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	919	c->conf->nodename);
706	if ((i)->conf->routerprio && (i)->conf != THISNODE)
707	(*i)->establish_connection ();
708	}	920	}
709		921
710	void	922	void
711	connection::dump_status ()	923	connection::dump_status ()
712	{	924	{
713	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	925	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
714	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	926	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
715	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	927	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
716	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	928	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
717	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	929	(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	}	930	}
721		931
722	void	932	void
723	vpn::dump_status ()	933	vpn::dump_status ()
724	{	934	{
725	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	935	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
726		936
727	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	937	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
728	(*c)->dump_status ();	938	(*c)->dump_status ();
729		939
730	slog (L_NOTICE, _("END status dump"));	940	slog (L_NOTICE, _("END status dump"));
731	}	941	}
732		942
733	vpn::vpn (void)	943	vpn::vpn (void)
		944	{
734	: event (this, &vpn::event_cb)	945	event .set<vpn, &vpn::event_cb > (this);
735	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	946	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
736	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	947	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
737	#if ENABLE_TCP	948	#if ENABLE_TCP
738	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	949	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
739	#endif	950	#endif
740	#if ENABLE_ICMP	951	#if ENABLE_ICMP
741	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	952	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
742	#endif	953	#endif
743	, tap_ev_watcher (this, &vpn::tap_ev)	954	#if ENABLE_DNS
744	{	955	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		956	#endif
		957	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
745	}	958	}
746		959
747	vpn::~vpn ()	960	vpn::~vpn ()
748	{	961	{
749	}	962	}

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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 1.68 by root, Wed Jul 15 23:04:06 2015 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 1.68 by root, Wed Jul 15 23:04:06 2015 UTC