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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.19 by pcg, Thu Oct 16 02:41:21 2003 UTC vs.
Revision 1.69 by root, Sat Sep 5 17:40:22 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 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
		60	vpn network; // THE vpn (bad design...)
		61
45	/////////////////////////////////////////////////////////////////////////////	62	/////////////////////////////////////////////////////////////////////////////
46		63
47	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 ()
48	{	104	{
49	// the tunnel device mtu should be the physical mtu - overhead	105	// the tunnel device mtu should be the physical mtu - overhead
50	// the tricky part is rounding to the cipher key blocksize	106	// the tricky part is rounding to the cipher key blocksize
51	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	107	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
52	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	108	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
53	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	109	mtu -= mtu % BLOCK_SIZE (CIPHER); // round
54	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	110	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
55		111
56	char *env;	112	char *env;
57	asprintf (&env, "CONFBASE=%s", confbase);	113	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
58	putenv (env);
59	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
60	putenv (env);
61	asprintf (&env, "NODEID=%d", THISNODE->id);
62	putenv (env);
63	asprintf (&env, "IFNAME=%s", tap->interface ());	114	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
64	putenv (env);	115	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		116	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
65	asprintf (&env, "MTU=%d", mtu);	117	asprintf (&env, "MTU=%d", mtu); putenv (env);
66	putenv (env);	118	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
67	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	119	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
68	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
69	THISNODE->id & 0xff);
70	putenv (env);
71		120
72	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;
73	}	168	}
74		169
75	int	170	int
76	vpn::setup ()	171	vpn::setup ()
77	{	172	{
		173	int success = 0;
		174
		175	ipv4_tos = -1;
78	ipv4_fd = -1;	176	ipv4_fd = -1;
79		177
80	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	178	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
81	{	179	{
82	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	180	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
83		181
84	if (ipv4_fd < 0)	182	if (ipv4_fd < 0)
85	return -1;	183	return -1;
86
87	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
88		184
89	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	185	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
90	// this I really consider a linux bug. I am neither connected	186	// this I really consider a linux bug. I am neither connected
91	// 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
92	// fragment for me sometimes.	188	// fragment for me sometimes.
…		…
98		194
99	sockinfo si (THISNODE, PROT_IPv4);	195	sockinfo si (THISNODE, PROT_IPv4);
100		196
101	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	197	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
102	{	198	{
103	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));
104	exit (1);	200	return -1;
105	}	201	}
106		202
107	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	203	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		204	++success;
108	}	205	}
		206	else
		207	THISNODE->protocols &= ~PROT_IPv4;
109		208
		209	udpv4_tos = -1;
110	udpv4_fd = -1;	210	udpv4_fd = -1;
111		211
112	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	212	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
113	{	213	{
114	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	214	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
115		215
116	if (udpv4_fd < 0)	216	if (udpv4_fd < 0)
117	return -1;	217	return -1;
118
119	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
120		218
121	// standard daemon practise...	219	// standard daemon practise...
122	{	220	{
123	int oval = 1;	221	int oval = 1;
124	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	222	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
136		234
137	sockinfo si (THISNODE, PROT_UDPv4);	235	sockinfo si (THISNODE, PROT_UDPv4);
138		236
139	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	237	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
140	{	238	{
141	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));
142	exit (1);	240	return -1;
143	}	241	}
144		242
145	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	243	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		244	++success;
146	}	245	}
		246	else
		247	THISNODE->protocols &= ~PROT_UDPv4;
147		248
		249	icmpv4_tos = -1;
148	icmpv4_fd = -1;	250	icmpv4_fd = -1;
149		251
150	#if ENABLE_ICMP	252	#if ENABLE_ICMP
151	if (THISNODE->protocols & PROT_ICMPv4)	253	if (THISNODE->protocols & PROT_ICMPv4)
152	{	254	{
153	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	255	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
154		256
155	if (icmpv4_fd < 0)	257	if (icmpv4_fd < 0)
156	return -1;	258	return -1;
157
158	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
159		259
160	#ifdef ICMP_FILTER	260	#ifdef ICMP_FILTER
161	{	261	{
162	icmp_filter oval;	262	icmp_filter oval;
163	oval.data = 0xffffffff;	263	oval.data = 0xffffffff;
…		…
172	// this I really consider a linux bug. I am neither connected	272	// this I really consider a linux bug. I am neither connected
173	// nor do I fragment myself. Linux still sets DF and doesn't	273	// nor do I fragment myself. Linux still sets DF and doesn't
174	// fragment for me sometimes.	274	// fragment for me sometimes.
175	{	275	{
176	int oval = IP_PMTUDISC_DONT;	276	int oval = IP_PMTUDISC_DONT;
177	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	277	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
178	}	278	}
179	#endif	279	#endif
180		280
181	sockinfo si (THISNODE, PROT_ICMPv4);	281	sockinfo si (THISNODE, PROT_ICMPv4);
182		282
183	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	283	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
184	{	284	{
185	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	285	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
186	exit (1);	286	return -1;
187	}	287	}
188		288
189	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	289	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		290	++success;
190	}	291	}
191	#endif	292	#endif
192		293
193	tcpv4_fd = -1;	294	tcpv4_fd = -1;
194		295
195	#if ENABLE_TCP	296	#if ENABLE_TCP
196	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	297	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
197	{	298	{
198	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	299	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
199		300
200	if (tcpv4_fd < 0)	301	if (tcpv4_fd < 0)
201	return -1;	302	return -1;
202		303
203	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
204
205	// standard daemon practise...	304	// standard daemon practise...
206	{	305	{
207	int oval = 1;	306	int oval = 1;
208	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	307	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
209	}	308	}
210		309
211	sockinfo si (THISNODE, PROT_TCPv4);	310	sockinfo si (THISNODE, PROT_TCPv4);
212		311
213	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	312	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
214	{	313	{
215	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	314	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
216	exit (1);	315	return -1;
217	}	316	}
218		317
219	if (listen (tcpv4_fd, 5))	318	if (listen (tcpv4_fd, 5))
220	{	319	{
221	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	320	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
222	exit (1);	321	return -1;
		322	}
		323
		324	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		325	++success;
		326	}
		327	else
		328	THISNODE->protocols &= ~PROT_TCPv4;
		329	#endif
		330
		331	dnsv4_tos = -1;
		332	dnsv4_fd = -1;
		333
		334	#if ENABLE_DNS
		335	if (THISNODE->protocols & PROT_DNSv4)
		336	{
		337	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		338
		339	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		340
		341	if (dnsv4_fd < 0)
		342	return -1;
		343
		344	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		345	// this I really consider a linux bug. I am neither connected
		346	// nor do I fragment myself. Linux still sets DF and doesn't
		347	// fragment for me sometimes.
		348	{
		349	int oval = IP_PMTUDISC_DONT;
		350	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
223	}	351	}
224
225	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
226	}
227	#endif	352	# endif
		353
		354	// standard daemon practise...
		355	{
		356	int oval = 1;
		357	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		358	}
		359
		360	sockinfo si (THISNODE->dns_hostname,
		361	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		362	PROT_DNSv4);
		363
		364	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		365	{
		366	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		367	return -1;
		368	}
		369
		370	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		371	++success;
		372	}
		373	#endif
		374
		375	/////////////////////////////////////////////////////////////////////////////
		376
		377	if (!success)
		378	{
		379	slog (L_ERR, _("no protocols enabled."));
		380	return -1;
		381	}
		382
		383	reconnect_all ();
		384
		385	/////////////////////////////////////////////////////////////////////////////
228		386
229	tap = new tap_device ();	387	tap = new tap_device ();
230	if (!tap) //D this, of course, never catches	388	if (!tap) //D this, of course, never catches
231	{	389	{
232	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	390	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
233	exit (1);	391	return -1;
234	}	392	}
235		393
236	run_script (run_script_cb (this, &vpn::script_if_up), true);	394	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
237		395
		396	run_script_cb cb;
		397	cb.set<vpn, &vpn::script_if_init> (this);
		398
		399	if (tap->if_up () &&
		400	!run_script (cb, true))
		401	{
		402	slog (L_ERR, _("interface initialization command '%s' failed."),
		403	tap->if_up ());
		404	return -1;
		405	}
		406
		407	cb.set<vpn, &vpn::script_if_up> (this);
		408	if (!run_script (cb, true))
		409	{
		410	slog (L_ERR, _("if-up command execution failed."));
		411	return -1;
		412	}
		413
238	tap_ev_watcher.start (tap->fd, POLLIN);	414	tap_ev_watcher.start (tap->fd, EV_READ);
239
240	reconnect_all ();
241		415
242	return 0;	416	return 0;
243	}	417	}
244		418
245	// send a vpn packet out to other hosts
246	bool	419	bool
247	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	420	vpn::drop_privileges ()
248	{	421	{
249	switch (si.prot)	422	if (::conf.change_root)
		423	{
		424	if (!strcmp (::conf.change_root, "/"))
		425	{
		426	char dir [L_tmpnam];
		427	if (!tmpnam (dir))
		428	{
		429	slog (L_CRIT, _("unable to create anonymous root path."));
		430	return false;
		431	}
		432
		433	if (mkdir (dir, 0700))
		434	{
		435	slog (L_CRIT, _("unable to create anonymous root directory."));
		436	return false;
		437	}
		438
		439	if (chdir (dir))
		440	{
		441	slog (L_CRIT, _("unable to change to anonymous root directory."));
		442	return false;
		443	}
		444
		445	if (rmdir (dir))
		446	slog (L_ERR, _("unable to remove anonymous root directory, continuing."));
		447	}
		448	else
		449	{
		450	if (chdir (::conf.change_root))
		451	{
		452	slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root);
		453	return false;
		454	}
		455	}
		456
		457	if (chroot ("."))
		458	{
		459	slog (L_CRIT, _("unable to set new root directory."));
		460	return false;
		461	}
		462
		463	if (chdir ("/"))
		464	{
		465	slog (L_CRIT, _("unable to set cwd to new root directory."));
		466	return false;
		467	}
		468	}
		469
		470	if (::conf.change_gid)
		471	if (setgid (::conf.change_gid))
250	{	472	{
251	case PROT_IPv4:	473	slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid);
252	return send_ipv4_packet (pkt, si, tos);
253
254	case PROT_UDPv4:
255	return send_udpv4_packet (pkt, si, tos);
256
257	#if ENABLE_TCP
258	case PROT_TCPv4:
259	return send_tcpv4_packet (pkt, si, tos);
260	#endif
261
262	#if ENABLE_ICMP
263	case PROT_ICMPv4:
264	return send_icmpv4_packet (pkt, si, tos);
265	#endif
266
267	default:
268	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
269	return false;	474	return false;
270	}	475	}
		476
		477	if (::conf.change_uid)
		478	if (setuid (::conf.change_uid))
		479	{
		480	slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid);
		481	return false;
		482	}
		483
		484	return true;
271	}	485	}
272		486
273	bool	487	bool
274	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	488	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
275	{	489	{
276	#if defined(SOL_IP) && defined(IP_TOS)	490	set_tos (ipv4_fd, ipv4_tos, tos);
277	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
278	#endif
279	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	491	xsendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
280		492
281	return true;	493	return true;
282	}	494	}
283		495
284	static u16	496	static u16
…		…
306		518
307	#if ENABLE_ICMP	519	#if ENABLE_ICMP
308	bool	520	bool
309	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	521	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
310	{	522	{
311	#if defined(SOL_IP) && defined(IP_TOS)
312	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
313	#endif
314
315	pkt->unshift_hdr (4);	523	pkt->unshift_hdr (4);
316		524
317	icmp_header hdr = (icmp_header )&((*pkt)[0]);	525	icmp_header hdr = (icmp_header )&((*pkt)[0]);
318	hdr->type = ::conf.icmp_type;	526	hdr->type = ::conf.icmp_type;
319	hdr->code = 255;	527	hdr->code = 255;
320	hdr->checksum = 0;	528	hdr->checksum = 0;
321	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	529	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
322		530
		531	set_tos (icmpv4_fd, icmpv4_tos, tos);
323	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	532	xsendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
324		533
325	return true;	534	return true;
326	}	535	}
327	#endif	536	#endif
328		537
329	bool	538	bool
330	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	539	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
331	{	540	{
332	#if defined(SOL_IP) && defined(IP_TOS)	541	set_tos (udpv4_fd, udpv4_tos, tos);
333	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
334	#endif
335	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	542	xsendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
336		543
337	return true;	544	return true;
338	}	545	}
339		546
340	void	547	void
…		…
350	{	557	{
351	// broadcast, this is ugly, but due to the security policy	558	// broadcast, this is ugly, but due to the security policy
352	// we have to connect to all hosts...	559	// we have to connect to all hosts...
353	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	560	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
354	if ((*c)->conf != THISNODE)	561	if ((*c)->conf != THISNODE)
355	(*c)->inject_data_packet (pkt, true);	562	(*c)->inject_data_packet (pkt);
356	}	563	}
357	}	564	}
358		565
359	void	566	void
360	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	567	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
361	{	568	{
362	unsigned int src = pkt->src ();	569	unsigned int src = pkt->src ();
363	unsigned int dst = pkt->dst ();	570	unsigned int dst = pkt->dst ();
364		571
365	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	572	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
366	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	573	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
367		574
368	if (src == 0 \|\| src > conns.size ()	575	if (src == 0 \|\| src > conns.size ()
369	\|\| dst > conns.size ()	576	\|\| dst > conns.size ()
370	\|\| pkt->typ () >= vpn_packet::PT_MAX)	577	\|\| pkt->typ () >= vpn_packet::PT_MAX)
371	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	578	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
372	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
373	else if (dst > conns.size ())
374	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
375	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	579	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
376	else	580	else
377	{	581	{
378	connection *c = conns[src - 1];	582	connection *c = conns[src - 1];
379		583
380	if (dst == 0)	584	if (dst == 0)
381	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	585	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
382	c->conf->nodename, (const char *)rsi);	586	c->conf->nodename, (const char *)rsi);
383	else if (dst != THISNODE->id)	587	else if (dst != THISNODE->id)
384	{	588	{
385	if (THISNODE->routerprio)	589	if (THISNODE->routerprio)
386	// the tos setting gets lost here. who cares.	590	// the tos setting gets lost here. who cares.
387	conns[dst - 1]->inject_vpn_packet (pkt);	591	conns[dst - 1]->inject_vpn_packet (pkt);
388	else	592	else
389	slog (L_WARN,	593	slog (L_WARN,
390	_("%s(%s): forwarding request (=> %s), but we are no router"),	594	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
391	c->conf->nodename, (const char *)rsi,	595	c->conf->nodename, (const char *)rsi,
392	conns[dst - 1]->conf->nodename);	596	conns[dst - 1]->conf->nodename);
393	}	597	}
394	else	598	else
395	c->recv_vpn_packet (pkt, rsi);	599	c->recv_vpn_packet (pkt, rsi);
396	}	600	}
397	}	601	}
398		602
399	void	603	bool
		604	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		605	{
		606	switch (si.prot)
		607	{
		608	case PROT_IPv4:
		609	return send_ipv4_packet (pkt, si, tos);
		610
		611	case PROT_UDPv4:
		612	return send_udpv4_packet (pkt, si, tos);
		613
		614	#if ENABLE_TCP
		615	case PROT_TCPv4:
		616	return send_tcpv4_packet (pkt, si, tos);
		617	#endif
		618	#if ENABLE_ICMP
		619	case PROT_ICMPv4:
		620	return send_icmpv4_packet (pkt, si, tos);
		621	#endif
		622	#if ENABLE_DNS
		623	case PROT_DNSv4:
		624	return send_dnsv4_packet (pkt, si, tos);
		625	#endif
		626	default:
		627	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		628	}
		629
		630	return false;
		631	}
		632
		633	inline void
400	vpn::ipv4_ev (io_watcher &w, short revents)	634	vpn::ipv4_ev (ev::io &w, int revents)
401	{	635	{
402	if (revents & (POLLIN \| POLLERR))	636	if (revents & EV_READ)
403	{	637	{
404	vpn_packet *pkt = new vpn_packet;	638	vpn_packet *pkt = new vpn_packet;
405	struct sockaddr_in sa;	639	struct sockaddr_in sa;
406	socklen_t sa_len = sizeof (sa);	640	socklen_t sa_len = sizeof (sa);
407	int len;	641	int len;
…		…
412		646
413	if (len > 0)	647	if (len > 0)
414	{	648	{
415	pkt->len = len;	649	pkt->len = len;
416		650
417	// raw sockets deliver the ipv4, but don't expect it on sends	651	// raw sockets deliver the ipv4 header, but don't expect it on sends
418	// this is slow, but...	652	pkt->skip_hdr (pkt->ipv4_hdr_len ());
419	pkt->skip_hdr (IP_OVERHEAD);
420		653
421	recv_vpn_packet (pkt, si);	654	recv_vpn_packet (pkt, si);
422	}	655	}
423	else	656	else
424	{	657	{
425	// probably ECONNRESET or somesuch	658	// probably ECONNRESET or somesuch
426	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	659	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
427	}	660	}
428		661
429	delete pkt;	662	delete pkt;
430	}	663	}
431	else if (revents & POLLHUP)
432	{
433	// this cannot ;) happen on udp sockets
434	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
435	exit (1);
436	}
437	else	664	else
438	{	665	{
439	slog (L_ERR,	666	slog (L_ERR,
440	_("FATAL: unknown revents %08x in socket, terminating\n"),	667	_("FATAL: unknown revents %08x in socket, exiting.\n"),
441	revents);	668	revents);
442	exit (1);	669	exit (EXIT_FAILURE);
443	}	670	}
444	}	671	}
445		672
446	#if ENABLE_ICMP	673	#if ENABLE_ICMP
447	void	674	inline void
448	vpn::icmpv4_ev (io_watcher &w, short revents)	675	vpn::icmpv4_ev (ev::io &w, int revents)
449	{	676	{
450	if (revents & (POLLIN \| POLLERR))	677	if (revents & EV_READ)
451	{	678	{
452	vpn_packet *pkt = new vpn_packet;	679	vpn_packet *pkt = new vpn_packet;
453	struct sockaddr_in sa;	680	struct sockaddr_in sa;
454	socklen_t sa_len = sizeof (sa);	681	socklen_t sa_len = sizeof (sa);
455	int len;	682	int len;
…		…
467	if (hdr->type == ::conf.icmp_type	694	if (hdr->type == ::conf.icmp_type
468	&& hdr->code == 255)	695	&& hdr->code == 255)
469	{	696	{
470	// raw sockets deliver the ipv4, but don't expect it on sends	697	// raw sockets deliver the ipv4, but don't expect it on sends
471	// this is slow, but...	698	// this is slow, but...
472	pkt->skip_hdr (ICMP_OVERHEAD);	699	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
473		700
474	recv_vpn_packet (pkt, si);	701	recv_vpn_packet (pkt, si);
475	}	702	}
476	}	703	}
477	else	704	else
478	{	705	{
479	// probably ECONNRESET or somesuch	706	// probably ECONNRESET or somesuch
480	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	707	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
481	}	708	}
482		709
483	delete pkt;	710	delete pkt;
484	}	711	}
485	else if (revents & POLLHUP)
486	{
487	// this cannot ;) happen on udp sockets
488	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
489	exit (1);
490	}
491	else	712	else
492	{	713	{
493	slog (L_ERR,	714	slog (L_ERR,
494	_("FATAL: unknown revents %08x in socket, terminating\n"),	715	_("FATAL: unknown revents %08x in socket, exiting.\n"),
495	revents);	716	revents);
496	exit (1);	717	exit (EXIT_FAILURE);
497	}	718	}
498	}	719	}
499	#endif	720	#endif
500		721
501	void	722	inline void
502	vpn::udpv4_ev (io_watcher &w, short revents)	723	vpn::udpv4_ev (ev::io &w, int revents)
503	{	724	{
504	if (revents & (POLLIN \| POLLERR))	725	if (revents & EV_READ)
505	{	726	{
506	vpn_packet *pkt = new vpn_packet;	727	vpn_packet *pkt = new vpn_packet;
507	struct sockaddr_in sa;	728	struct sockaddr_in sa;
508	socklen_t sa_len = sizeof (sa);	729	socklen_t sa_len = sizeof (sa);
509	int len;	730	int len;
…		…
519	recv_vpn_packet (pkt, si);	740	recv_vpn_packet (pkt, si);
520	}	741	}
521	else	742	else
522	{	743	{
523	// probably ECONNRESET or somesuch	744	// probably ECONNRESET or somesuch
524	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	745	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
525	}	746	}
526		747
527	delete pkt;	748	delete pkt;
528	}	749	}
529	else if (revents & POLLHUP)
530	{
531	// this cannot ;) happen on udp sockets
532	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
533	exit (1);
534	}
535	else	750	else
536	{	751	{
537	slog (L_ERR,	752	slog (L_ERR,
538	_("FATAL: unknown revents %08x in socket, terminating\n"),	753	_("FATAL: unknown revents %08x in socket, exiting.\n"),
539	revents);	754	revents);
540	exit (1);	755	exit (EXIT_FAILURE);
541	}	756	}
542	}	757	}
543		758
544	void	759	inline void
545	vpn::tap_ev (io_watcher &w, short revents)	760	vpn::tap_ev (ev::io &w, int revents)
546	{	761	{
547	if (revents & POLLIN)	762	if (revents & EV_READ)
548	{	763	{
549	/* process data */	764	/* process data */
550	tap_packet *pkt;	765	tap_packet *pkt;
551		766
552	pkt = tap->recv ();	767	pkt = tap->recv ();
…		…
559	int dst = mac2id (pkt->dst);	774	int dst = mac2id (pkt->dst);
560	int src = mac2id (pkt->src);	775	int src = mac2id (pkt->src);
561		776
562	if (src != THISNODE->id)	777	if (src != THISNODE->id)
563	{	778	{
564	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));	779	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
565	exit (1);	780	exit (EXIT_FAILURE);
566	}	781	}
567		782
568	if (dst == THISNODE->id)	783	if (dst == THISNODE->id)
569	{	784	{
570	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));	785	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
571	exit (1);	786	exit (EXIT_FAILURE);
572	}	787	}
573		788
574	if (dst > conns.size ())	789	if (dst > conns.size ())
575	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);	790	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
576	else	791	else
577	inject_data_packet (pkt, dst);	792	inject_data_packet (pkt, dst);
578	}	793	}
579		794
580	delete pkt;	795	delete pkt;
581	}	796	}
582	else if (revents & (POLLHUP \| POLLERR))
583	{
584	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
585	exit (1);
586	}
587	else	797	else
588	abort ();	798	abort ();
589	}	799	}
590		800
591	void	801	inline void
592	vpn::event_cb (time_watcher &w)	802	vpn::event_cb (ev::timer &w, int)
593	{	803	{
594	if (events)	804	if (events)
595	{	805	{
596	if (events & EVENT_SHUTDOWN)	806	if (events & EVENT_SHUTDOWN)
597	{	807	{
598	slog (L_INFO, _("preparing shutdown..."));	808	slog (L_INFO, _("preparing shutdown..."));
599		809
600	shutdown_all ();	810	shutdown_all ();
601
602	remove_pid (pidfilename);	811	remove_pid (conf.pidfilename);
603
604	slog (L_INFO, _("terminating"));	812	slog (L_INFO, _("exiting."));
605		813	exit (EXIT_SUCCESS);
606	exit (0);
607	}	814	}
608		815
609	if (events & EVENT_RECONNECT)	816	if (events & EVENT_RECONNECT)
610	{	817	{
611	slog (L_INFO, _("forced reconnect"));	818	slog (L_INFO, _("forced reconnect."));
612		819
613	reconnect_all ();	820	reconnect_all ();
614	}	821	}
615		822
616	events = 0;	823	events = 0;
617	}	824	}
618
619	w.at = TSTAMP_CANCEL;
620	}	825	}
621		826
622	void	827	void
623	vpn::shutdown_all ()	828	vpn::shutdown_all ()
624	{	829	{
…		…
634		839
635	conns.clear ();	840	conns.clear ();
636		841
637	connection_init ();	842	connection_init ();
638		843
639	for (configuration::node_vector::iterator i = conf.nodes.begin ();	844	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
640	i != conf.nodes.end (); ++i)	845	conns.push_back (new connection (this, *i));
641	{
642	connection *conn = new connection (this);
643		846
644	conn->conf = *i;	847	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
645	conns.push_back (conn);
646
647	conn->establish_connection ();	848	(*c)->establish_connection ();
648	}
649	}	849	}
650		850
651	connection *vpn::find_router ()	851	bool
		852	vpn::can_direct (conf_node src, conf_node dst) const
652	{	853	{
653	u32 prio = 1;	854	return src != dst
		855	&& src->may_direct (dst)
		856	&& dst->may_direct (src)
		857	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		858	\|\| (src->protocols & dst->connectable_protocols ()));
		859	}
		860
		861	// only works for indirect and routed connections: find a router
		862	// from THISNODE to dst
		863	connection *
		864	vpn::find_router_for (const connection *dst)
		865	{
654	connection *router = 0;	866	connection *router = 0;
655		867
		868	// first try to find a router with a direct connection, route there
		869	// regardless of any other considerations.
		870	{
		871	u32 prio = 1;
		872
		873	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		874	{
		875	connection c = i;
		876
		877	if (c->conf->routerprio > prio
		878	&& c->conf != THISNODE
		879	&& can_direct (c->conf, dst->conf)
		880	&& c->ictx && c->octx)
		881	{
		882	prio = c->conf->routerprio;
		883	router = c;
		884	}
		885	}
		886	}
		887
		888	if (router)
		889	return router;
		890
		891	// second try find the router with the highest priority, higher than ours
		892	{
		893	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		894
		895	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		896	{
		897	connection c = i;
		898
		899	if (c->conf->routerprio > prio
		900	&& c != dst
		901	&& c->conf != THISNODE
		902	&& c->ictx && c->octx)
		903	{
		904	prio = c->conf->routerprio;
		905	router = c;
		906	}
		907	}
		908	}
		909
		910	return router;
		911	}
		912
		913	void
		914	vpn::connection_established (connection *c)
		915	{
656	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	916	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
657	{	917	{
658	connection c = i;	918	connection o = i;
659		919
660	if (c->conf->routerprio > prio	920	if (o->si.valid ()
661	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	921	&& c->si != o->si
662	&& c->ictx && c->octx	922	&& c == find_router_for (o)
663	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	923	&& !can_direct (THISNODE, o->conf))
664	{
665	prio = c->conf->routerprio;
666	router = c;
667	}	924	{
		925	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		926	o->conf->nodename, c->conf->nodename);
		927	o->rekey ();
		928	}
668	}	929	}
669
670	return router;
671	}	930	}
672		931
		932	void
673	void vpn::send_connect_request (int id)	933	vpn::send_connect_request (connection *c)
674	{	934	{
675	connection *c = find_router ();	935	connection *r = find_router_for (c);
676		936
677	if (c)	937	if (r)
		938	{
		939	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		940	c->conf->nodename, r->conf->nodename);
678	c->send_connect_request (id);	941	r->send_connect_request (c->conf->id);
		942	}
679	else	943	else
680	// no router found, aggressively connect to all routers	944	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
681	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	945	c->conf->nodename);
682	if ((i)->conf->routerprio && (i)->conf != THISNODE)
683	(*i)->establish_connection ();
684	}	946	}
685		947
686	void	948	void
687	connection::dump_status ()	949	connection::dump_status ()
688	{	950	{
689	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	951	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
690	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	952	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
691	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	953	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
692	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	954	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
693	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	955	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
694	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
695	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
696	}	956	}
697		957
698	void	958	void
699	vpn::dump_status ()	959	vpn::dump_status ()
700	{	960	{
701	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	961	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
702		962
703	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	963	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
704	(*c)->dump_status ();	964	(*c)->dump_status ();
705		965
706	slog (L_NOTICE, _("END status dump"));	966	slog (L_NOTICE, _("END status dump"));
707	}	967	}
708		968
709	vpn::vpn (void)	969	vpn::vpn (void)
		970	{
710	: event (this, &vpn::event_cb)	971	event .set<vpn, &vpn::event_cb > (this);
711	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	972	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
712	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	973	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
713	#if ENABLE_TCP	974	#if ENABLE_TCP
714	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	975	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
715	#endif	976	#endif
716	#if ENABLE_ICMP	977	#if ENABLE_ICMP
717	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	978	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
718	#endif	979	#endif
719	, tap_ev_watcher (this, &vpn::tap_ev)	980	#if ENABLE_DNS
720	{	981	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		982	#endif
		983	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
721	}	984	}
722		985
723	vpn::~vpn ()	986	vpn::~vpn ()
724	{	987	{
725	}	988	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.19 by pcg, Thu Oct 16 02:41:21 2003 UTC vs. Revision 1.69 by root, Sat Sep 5 17:40:22 2015 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.19 by pcg, Thu Oct 16 02:41:21 2003 UTC vs.
Revision 1.69 by root, Sat Sep 5 17:40:22 2015 UTC