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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.16 by pcg, Tue Oct 14 19:59:16 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) 2003-2008,2010,2011,2013 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/wait.h>	42	#include <sys/wait.h>
		43	#include <sys/stat.h>
30	#include <errno.h>	44	#include <errno.h>
31	#include <time.h>	45	#include <time.h>
32	#include <unistd.h>	46	#include <unistd.h>
33	#include <fcntl.h>	47	#include <fcntl.h>
34	#include <sys/socket.h>	48	#include <sys/socket.h>
39		53
40	#include "connection.h"	54	#include "connection.h"
41	#include "util.h"	55	#include "util.h"
42	#include "vpn.h"	56	#include "vpn.h"
43		57
		58	using namespace std;
		59
		60	vpn network; // THE vpn (bad design...)
		61
44	/////////////////////////////////////////////////////////////////////////////	62	/////////////////////////////////////////////////////////////////////////////
45		63
46	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 ()
47	{	104	{
48	// the tunnel device mtu should be the physical mtu - overhead	105	// the tunnel device mtu should be the physical mtu - overhead
49	// the tricky part is rounding to the cipher key blocksize	106	// the tricky part is rounding to the cipher key blocksize
50	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	107	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
51	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	108	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
52	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	109	mtu -= mtu % BLOCK_SIZE (CIPHER); // round
53	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	110	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
54		111
55	char *env;	112	char *env;
56	asprintf (&env, "CONFBASE=%s", confbase);	113	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
57	putenv (env);
58	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
59	putenv (env);
60	asprintf (&env, "NODEID=%d", THISNODE->id);
61	putenv (env);
62	asprintf (&env, "IFNAME=%s", tap->interface ());	114	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
63	putenv (env);	115	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		116	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
64	asprintf (&env, "MTU=%d", mtu);	117	asprintf (&env, "MTU=%d", mtu); putenv (env);
65	putenv (env);	118	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
66	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	119	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
67	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
68	THISNODE->id & 0xff);
69	putenv (env);
70		120
71	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;
72	}	168	}
73		169
74	int	170	int
75	vpn::setup ()	171	vpn::setup ()
76	{	172	{
		173	int success = 0;
		174
		175	ipv4_tos = -1;
77	ipv4_fd = -1;	176	ipv4_fd = -1;
78		177
79	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	178	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
80	{	179	{
81	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	180	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
82		181
83	if (ipv4_fd < 0)	182	if (ipv4_fd < 0)
84	return -1;	183	return -1;
85
86	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
87		184
88	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	185	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
89	// this I really consider a linux bug. I am neither connected	186	// this I really consider a linux bug. I am neither connected
90	// 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
91	// fragment for me sometimes.	188	// fragment for me sometimes.
…		…
97		194
98	sockinfo si (THISNODE, PROT_IPv4);	195	sockinfo si (THISNODE, PROT_IPv4);
99		196
100	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	197	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
101	{	198	{
102	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));
103	exit (1);	200	return -1;
104	}	201	}
105		202
106	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	203	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		204	++success;
107	}	205	}
		206	else
		207	THISNODE->protocols &= ~PROT_IPv4;
108		208
		209	udpv4_tos = -1;
109	udpv4_fd = -1;	210	udpv4_fd = -1;
110		211
111	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	212	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
112	{	213	{
113	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	214	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
114		215
115	if (udpv4_fd < 0)	216	if (udpv4_fd < 0)
116	return -1;	217	return -1;
117
118	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
119		218
120	// standard daemon practise...	219	// standard daemon practise...
121	{	220	{
122	int oval = 1;	221	int oval = 1;
123	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	222	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
135		234
136	sockinfo si (THISNODE, PROT_UDPv4);	235	sockinfo si (THISNODE, PROT_UDPv4);
137		236
138	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	237	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
139	{	238	{
140	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));
141	exit (1);	240	return -1;
142	}	241	}
143		242
144	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	243	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		244	++success;
145	}	245	}
		246	else
		247	THISNODE->protocols &= ~PROT_UDPv4;
146		248
		249	icmpv4_tos = -1;
147	icmpv4_fd = -1;	250	icmpv4_fd = -1;
148		251
149	#if ENABLE_ICMP	252	#if ENABLE_ICMP
150	if (THISNODE->protocols & PROT_ICMPv4)	253	if (THISNODE->protocols & PROT_ICMPv4)
151	{	254	{
152	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	255	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
153		256
154	if (icmpv4_fd < 0)	257	if (icmpv4_fd < 0)
155	return -1;	258	return -1;
156
157	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
158		259
159	#ifdef ICMP_FILTER	260	#ifdef ICMP_FILTER
160	{	261	{
161	icmp_filter oval;	262	icmp_filter oval;
162	oval.data = 0xffffffff;	263	oval.data = 0xffffffff;
…		…
171	// this I really consider a linux bug. I am neither connected	272	// this I really consider a linux bug. I am neither connected
172	// 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
173	// fragment for me sometimes.	274	// fragment for me sometimes.
174	{	275	{
175	int oval = IP_PMTUDISC_DONT;	276	int oval = IP_PMTUDISC_DONT;
176	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	277	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
177	}	278	}
178	#endif	279	#endif
179		280
180	sockinfo si (THISNODE, PROT_ICMPv4);	281	sockinfo si (THISNODE, PROT_ICMPv4);
181		282
182	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	283	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
183	{	284	{
184	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));
185	exit (1);	286	return -1;
186	}	287	}
187		288
188	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	289	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		290	++success;
189	}	291	}
190	#endif	292	#endif
191		293
192	tcpv4_fd = -1;	294	tcpv4_fd = -1;
193		295
194	#if ENABLE_TCP	296	#if ENABLE_TCP
195	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	297	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
196	{	298	{
197	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	299	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
198		300
199	if (tcpv4_fd < 0)	301	if (tcpv4_fd < 0)
200	return -1;	302	return -1;
201		303
202	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
203
204	// standard daemon practise...	304	// standard daemon practise...
205	{	305	{
206	int oval = 1;	306	int oval = 1;
207	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	307	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
208	}	308	}
209		309
210	sockinfo si (THISNODE, PROT_TCPv4);	310	sockinfo si (THISNODE, PROT_TCPv4);
211		311
212	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	312	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
213	{	313	{
214	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));
215	exit (1);	315	return -1;
216	}	316	}
217		317
218	if (listen (tcpv4_fd, 5))	318	if (listen (tcpv4_fd, 5))
219	{	319	{
220	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));
221	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);
222	}	351	}
223
224	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
225	}
226	#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	/////////////////////////////////////////////////////////////////////////////
227		386
228	tap = new tap_device ();	387	tap = new tap_device ();
229	if (!tap) //D this, of course, never catches	388	if (!tap) //D this, of course, never catches
230	{	389	{
231	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	390	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
232	exit (1);	391	return -1;
233	}	392	}
234		393
235	run_script (run_script_cb (this, &vpn::script_if_up), true);	394	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
236		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
237	tap_ev_watcher.start (tap->fd, POLLIN);	414	tap_ev_watcher.start (tap->fd, EV_READ);
238
239	reconnect_all ();
240		415
241	return 0;	416	return 0;
242	}	417	}
243		418
244	// send a vpn packet out to other hosts
245	bool	419	bool
246	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)	420	vpn::drop_privileges ()
247	{	421	{
248	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))
249	{	472	{
250	case PROT_IPv4:	473	slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid);
251	return send_ipv4_packet (pkt, si, tos);
252
253	case PROT_UDPv4:
254	return send_udpv4_packet (pkt, si, tos);
255
256	#if ENABLE_TCP
257	case PROT_TCPv4:
258	return send_tcpv4_packet (pkt, si, tos);
259	#endif
260
261	#if ENABLE_ICMP
262	case PROT_ICMPv4:
263	return send_icmpv4_packet (pkt, si, tos);
264	#endif
265
266	default:
267	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
268	return false;	474	return false;
269	}	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;
270	}	485	}
271		486
272	bool	487	bool
273	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)
274	{	489	{
275	#if defined(SOL_IP) && defined(IP_TOS)	490	set_tos (ipv4_fd, ipv4_tos, tos);
276	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
277	#endif
278	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 ());
279		492
280	return true;	493	return true;
281	}	494	}
282		495
283	static u16	496	static u16
…		…
305		518
306	#if ENABLE_ICMP	519	#if ENABLE_ICMP
307	bool	520	bool
308	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)
309	{	522	{
310	#if defined(SOL_IP) && defined(IP_TOS)
311	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
312	#endif
313
314	pkt->unshift_hdr (4);	523	pkt->unshift_hdr (4);
315		524
316	icmp_header hdr = (icmp_header )&((*pkt)[0]);	525	icmp_header hdr = (icmp_header )&((*pkt)[0]);
317	hdr->type = ::conf.icmp_type;	526	hdr->type = ::conf.icmp_type;
318	hdr->code = 255;	527	hdr->code = 255;
319	hdr->checksum = 0;	528	hdr->checksum = 0;
320	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	529	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
321		530
		531	set_tos (icmpv4_fd, icmpv4_tos, tos);
322	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 ());
323		533
324	return true;	534	return true;
325	}	535	}
326	#endif	536	#endif
327		537
328	bool	538	bool
329	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)
330	{	540	{
331	#if defined(SOL_IP) && defined(IP_TOS)	541	set_tos (udpv4_fd, udpv4_tos, tos);
332	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
333	#endif
334	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 ());
335		543
336	return true;	544	return true;
		545	}
		546
		547	void
		548	vpn::inject_data_packet (tap_packet *pkt, int dst)
		549	{
		550	if (dst)
		551	{
		552	// unicast
		553	if (dst != THISNODE->id)
		554	conns[dst - 1]->inject_data_packet (pkt);
		555	}
		556	else
		557	{
		558	// broadcast, this is ugly, but due to the security policy
		559	// we have to connect to all hosts...
		560	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		561	if ((*c)->conf != THISNODE)
		562	(*c)->inject_data_packet (pkt);
		563	}
337	}	564	}
338		565
339	void	566	void
340	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	567	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
341	{	568	{
342	unsigned int src = pkt->src ();	569	unsigned int src = pkt->src ();
343	unsigned int dst = pkt->dst ();	570	unsigned int dst = pkt->dst ();
344		571
345	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."),
346	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	573	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
347		574
348	if (src == 0 \|\| src > conns.size ()	575	if (src == 0 \|\| src > conns.size ()
349	\|\| dst > conns.size ()	576	\|\| dst > conns.size ()
350	\|\| pkt->typ () >= vpn_packet::PT_MAX)	577	\|\| pkt->typ () >= vpn_packet::PT_MAX)
351	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)."),
352	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
353	else if (dst > conns.size ())
354	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
355	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	579	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
356	else	580	else
357	{	581	{
358	connection *c = conns[src - 1];	582	connection *c = conns[src - 1];
359		583
360	if (dst == 0)	584	if (dst == 0)
361	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	585	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
362	c->conf->nodename, (const char *)rsi);	586	c->conf->nodename, (const char *)rsi);
363	else if (dst != 0 && dst != THISNODE->id)	587	else if (dst != THISNODE->id)
364	{	588	{
365	if (THISNODE->routerprio)	589	if (THISNODE->routerprio)
366	// the tos setting gets lost here. who cares.	590	// the tos setting gets lost here. who cares.
367	conns[dst - 1]->inject_vpn_packet (pkt);	591	conns[dst - 1]->inject_vpn_packet (pkt);
368	else	592	else
369	slog (L_WARN,	593	slog (L_WARN,
370	_("%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?)."),
371	c->conf->nodename, (const char *)rsi,	595	c->conf->nodename, (const char *)rsi,
372	conns[dst - 1]->conf->nodename);	596	conns[dst - 1]->conf->nodename);
373	}	597	}
374	else	598	else
375	c->recv_vpn_packet (pkt, rsi);	599	c->recv_vpn_packet (pkt, rsi);
376	}	600	}
377	}	601	}
378		602
379	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
380	vpn::ipv4_ev (io_watcher &w, short revents)	634	vpn::ipv4_ev (ev::io &w, int revents)
381	{	635	{
382	if (revents & (POLLIN \| POLLERR))	636	if (revents & EV_READ)
383	{	637	{
384	vpn_packet *pkt = new vpn_packet;	638	vpn_packet *pkt = new vpn_packet;
385	struct sockaddr_in sa;	639	struct sockaddr_in sa;
386	socklen_t sa_len = sizeof (sa);	640	socklen_t sa_len = sizeof (sa);
387	int len;	641	int len;
…		…
392		646
393	if (len > 0)	647	if (len > 0)
394	{	648	{
395	pkt->len = len;	649	pkt->len = len;
396		650
397	// 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
398	// this is slow, but...	652	pkt->skip_hdr (pkt->ipv4_hdr_len ());
399	pkt->skip_hdr (IP_OVERHEAD);
400		653
401	recv_vpn_packet (pkt, si);	654	recv_vpn_packet (pkt, si);
402	}	655	}
403	else	656	else
404	{	657	{
405	// probably ECONNRESET or somesuch	658	// probably ECONNRESET or somesuch
406	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	659	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
407	}	660	}
408		661
409	delete pkt;	662	delete pkt;
410	}	663	}
411	else if (revents & POLLHUP)
412	{
413	// this cannot ;) happen on udp sockets
414	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
415	exit (1);
416	}
417	else	664	else
418	{	665	{
419	slog (L_ERR,	666	slog (L_ERR,
420	_("FATAL: unknown revents %08x in socket, terminating\n"),	667	_("FATAL: unknown revents %08x in socket, exiting.\n"),
421	revents);	668	revents);
422	exit (1);	669	exit (EXIT_FAILURE);
423	}	670	}
424	}	671	}
425		672
426	#if ENABLE_ICMP	673	#if ENABLE_ICMP
427	void	674	inline void
428	vpn::icmpv4_ev (io_watcher &w, short revents)	675	vpn::icmpv4_ev (ev::io &w, int revents)
429	{	676	{
430	if (revents & (POLLIN \| POLLERR))	677	if (revents & EV_READ)
431	{	678	{
432	vpn_packet *pkt = new vpn_packet;	679	vpn_packet *pkt = new vpn_packet;
433	struct sockaddr_in sa;	680	struct sockaddr_in sa;
434	socklen_t sa_len = sizeof (sa);	681	socklen_t sa_len = sizeof (sa);
435	int len;	682	int len;
…		…
447	if (hdr->type == ::conf.icmp_type	694	if (hdr->type == ::conf.icmp_type
448	&& hdr->code == 255)	695	&& hdr->code == 255)
449	{	696	{
450	// 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
451	// this is slow, but...	698	// this is slow, but...
452	pkt->skip_hdr (ICMP_OVERHEAD);	699	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
453		700
454	recv_vpn_packet (pkt, si);	701	recv_vpn_packet (pkt, si);
455	}	702	}
456	}	703	}
457	else	704	else
458	{	705	{
459	// probably ECONNRESET or somesuch	706	// probably ECONNRESET or somesuch
460	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	707	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
461	}	708	}
462		709
463	delete pkt;	710	delete pkt;
464	}	711	}
465	else if (revents & POLLHUP)
466	{
467	// this cannot ;) happen on udp sockets
468	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
469	exit (1);
470	}
471	else	712	else
472	{	713	{
473	slog (L_ERR,	714	slog (L_ERR,
474	_("FATAL: unknown revents %08x in socket, terminating\n"),	715	_("FATAL: unknown revents %08x in socket, exiting.\n"),
475	revents);	716	revents);
476	exit (1);	717	exit (EXIT_FAILURE);
477	}	718	}
478	}	719	}
479	#endif	720	#endif
480		721
481	void	722	inline void
482	vpn::udpv4_ev (io_watcher &w, short revents)	723	vpn::udpv4_ev (ev::io &w, int revents)
483	{	724	{
484	if (revents & (POLLIN \| POLLERR))	725	if (revents & EV_READ)
485	{	726	{
486	vpn_packet *pkt = new vpn_packet;	727	vpn_packet *pkt = new vpn_packet;
487	struct sockaddr_in sa;	728	struct sockaddr_in sa;
488	socklen_t sa_len = sizeof (sa);	729	socklen_t sa_len = sizeof (sa);
489	int len;	730	int len;
…		…
499	recv_vpn_packet (pkt, si);	740	recv_vpn_packet (pkt, si);
500	}	741	}
501	else	742	else
502	{	743	{
503	// probably ECONNRESET or somesuch	744	// probably ECONNRESET or somesuch
504	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));
505	}	746	}
506		747
507	delete pkt;	748	delete pkt;
508	}	749	}
509	else if (revents & POLLHUP)
510	{
511	// this cannot ;) happen on udp sockets
512	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
513	exit (1);
514	}
515	else	750	else
516	{	751	{
517	slog (L_ERR,	752	slog (L_ERR,
518	_("FATAL: unknown revents %08x in socket, terminating\n"),	753	_("FATAL: unknown revents %08x in socket, exiting.\n"),
519	revents);	754	revents);
520	exit (1);	755	exit (EXIT_FAILURE);
521	}	756	}
522	}	757	}
523		758
524	void	759	inline void
525	vpn::tap_ev (io_watcher &w, short revents)	760	vpn::tap_ev (ev::io &w, int revents)
526	{	761	{
527	if (revents & POLLIN)	762	if (revents & EV_READ)
528	{	763	{
529	/* process data */	764	/* process data */
530	tap_packet *pkt;	765	tap_packet *pkt;
531		766
532	pkt = tap->recv ();	767	pkt = tap->recv ();
533		768
		769	if (!pkt)
		770	return;
		771
		772	if (pkt->len > 14)
		773	{
534	int dst = mac2id (pkt->dst);	774	int dst = mac2id (pkt->dst);
535	int src = mac2id (pkt->src);	775	int src = mac2id (pkt->src);
536		776
537	if (src != THISNODE->id)	777	if (src != THISNODE->id)
538	{
539	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));
540	exit (1);
541	}
542
543	if (dst == THISNODE->id)
544	{
545	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
546	exit (1);
547	}
548
549	if (dst > conns.size ())
550	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
551	else
552	{
553	if (dst)
554	{	778	{
555	// unicast	779	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
556	if (dst != THISNODE->id)	780	exit (EXIT_FAILURE);
557	conns[dst - 1]->inject_data_packet (pkt);
558	}	781	}
		782
		783	if (dst == THISNODE->id)
		784	{
		785	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		786	exit (EXIT_FAILURE);
		787	}
		788
		789	if (dst > conns.size ())
		790	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
559	else	791	else
560	{
561	// broadcast, this is ugly, but due to the security policy
562	// we have to connect to all hosts...
563	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
564	if ((*c)->conf != THISNODE)
565	(*c)->inject_data_packet (pkt);	792	inject_data_packet (pkt, dst);
566	}
567	}	793	}
568		794
569	delete pkt;	795	delete pkt;
570	}
571	else if (revents & (POLLHUP \| POLLERR))
572	{
573	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
574	exit (1);
575	}	796	}
576	else	797	else
577	abort ();	798	abort ();
578	}	799	}
579		800
580	void	801	inline void
581	vpn::event_cb (time_watcher &w)	802	vpn::event_cb (ev::timer &w, int)
582	{	803	{
583	if (events)	804	if (events)
584	{	805	{
585	if (events & EVENT_SHUTDOWN)	806	if (events & EVENT_SHUTDOWN)
586	{	807	{
587	slog (L_INFO, _("preparing shutdown..."));	808	slog (L_INFO, _("preparing shutdown..."));
588		809
589	shutdown_all ();	810	shutdown_all ();
590
591	remove_pid (pidfilename);	811	remove_pid (conf.pidfilename);
592
593	slog (L_INFO, _("terminating"));	812	slog (L_INFO, _("exiting."));
594		813	exit (EXIT_SUCCESS);
595	exit (0);
596	}	814	}
597		815
598	if (events & EVENT_RECONNECT)	816	if (events & EVENT_RECONNECT)
599	{	817	{
600	slog (L_INFO, _("forced reconnect"));	818	slog (L_INFO, _("forced reconnect."));
601		819
602	reconnect_all ();	820	reconnect_all ();
603	}	821	}
604		822
605	events = 0;	823	events = 0;
606	}	824	}
607
608	w.at = TSTAMP_CANCEL;
609	}	825	}
610		826
611	void	827	void
612	vpn::shutdown_all ()	828	vpn::shutdown_all ()
613	{	829	{
…		…
623		839
624	conns.clear ();	840	conns.clear ();
625		841
626	connection_init ();	842	connection_init ();
627		843
628	for (configuration::node_vector::iterator i = conf.nodes.begin ();	844	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
629	i != conf.nodes.end (); ++i)	845	conns.push_back (new connection (this, *i));
630	{
631	connection *conn = new connection (this);
632		846
633	conn->conf = *i;	847	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
634	conns.push_back (conn);
635
636	conn->establish_connection ();	848	(*c)->establish_connection ();
637	}
638	}	849	}
639		850
640	connection *vpn::find_router ()	851	bool
		852	vpn::can_direct (conf_node src, conf_node dst) const
641	{	853	{
642	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	{
643	connection *router = 0;	866	connection *router = 0;
644		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	{
645	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	916	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
646	{	917	{
647	connection c = i;	918	connection o = i;
648		919
649	if (c->conf->routerprio > prio	920	if (o->si.valid ()
650	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	921	&& c->si != o->si
651	&& c->ictx && c->octx	922	&& c == find_router_for (o)
652	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode	923	&& !can_direct (THISNODE, o->conf))
653	{
654	prio = c->conf->routerprio;
655	router = c;
656	}	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	}
657	}	929	}
658
659	return router;
660	}	930	}
661		931
		932	void
662	void vpn::send_connect_request (int id)	933	vpn::send_connect_request (connection *c)
663	{	934	{
664	connection *c = find_router ();	935	connection *r = find_router_for (c);
665		936
666	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);
667	c->send_connect_request (id);	941	r->send_connect_request (c->conf->id);
		942	}
668	else	943	else
669	// 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."),
670	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	945	c->conf->nodename);
671	if ((i)->conf->routerprio && (i)->conf != THISNODE)
672	(*i)->establish_connection ();
673	}	946	}
674		947
675	void	948	void
676	connection::dump_status ()	949	connection::dump_status ()
677	{	950	{
678	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	951	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
679	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	952	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
680	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	953	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
681	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"),
682	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	955	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
683	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
684	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
685	}	956	}
686		957
687	void	958	void
688	vpn::dump_status ()	959	vpn::dump_status ()
689	{	960	{
690	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	961	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
691		962
692	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	963	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
693	(*c)->dump_status ();	964	(*c)->dump_status ();
694		965
695	slog (L_NOTICE, _("END status dump"));	966	slog (L_NOTICE, _("END status dump"));
696	}	967	}
697		968
698	vpn::vpn (void)	969	vpn::vpn (void)
		970	{
699	: event (this, &vpn::event_cb)	971	event .set<vpn, &vpn::event_cb > (this);
700	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	972	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
701	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	973	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
702	#if ENABLE_TCP	974	#if ENABLE_TCP
703	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	975	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
704	#endif	976	#endif
705	#if ENABLE_ICMP	977	#if ENABLE_ICMP
706	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	978	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
707	#endif	979	#endif
708	, tap_ev_watcher (this, &vpn::tap_ev)	980	#if ENABLE_DNS
709	{	981	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		982	#endif
		983	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
710	}	984	}
711		985
712	vpn::~vpn ()	986	vpn::~vpn ()
713	{	987	{
714	}	988	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.16 by pcg, Tue Oct 14 19:59:16 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 1.16 by pcg, Tue Oct 14 19:59:16 2003 UTC vs.
Revision 1.69 by root, Sat Sep 5 17:40:22 2015 UTC