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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.2 by pcg, Wed Apr 2 05:15:00 2003 UTC vs.
Revision 1.60 by root, Fri Sep 16 18:01:27 2011 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 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>
31	#include <netinet/in.h>
32	#include <arpa/inet.h>
33	#include <errno.h>	43	#include <errno.h>
34	#include <time.h>	44	#include <time.h>
35	#include <unistd.h>	45	#include <unistd.h>
		46	#include <fcntl.h>
		47	#include <sys/socket.h>
		48
		49	#include "netcompat.h"
36		50
37	#include "pidfile.h"	51	#include "pidfile.h"
38		52
39	#include "connection.h"	53	#include "connection.h"
40	#include "util.h"	54	#include "util.h"
41	#include "vpn.h"	55	#include "vpn.h"
42		56
43	#if ENABLE_TCP	57	vpn network; // THE vpn (bad design...)
44	# include <map>
45	# include <unistd.h>
46	# include <fcntl.h>
47	# include <sys/poll.h>
48	#endif
49		58
50	/////////////////////////////////////////////////////////////////////////////	59	/////////////////////////////////////////////////////////////////////////////
51		60
52	const char *vpn::script_if_up ()	61	static void inline
		62	set_tos (int fd, int &tos_prev, int tos)
		63	{
		64	#if defined(SOL_IP) && defined(IP_TOS)
		65	if (tos_prev == tos)
		66	return;
		67
		68	tos_prev = tos;
		69	setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		70	#endif
		71	}
		72
		73	void
		74	vpn::script_init_env ()
53	{	75	{
54	// the tunnel device mtu should be the physical mtu - overhead	76	// the tunnel device mtu should be the physical mtu - overhead
55	// the tricky part is rounding to the cipher key blocksize	77	// the tricky part is rounding to the cipher key blocksize
56	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	78	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
57	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	79	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
58	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	80	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
59	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	81	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
60		82
61	char *env;	83	char *env;
62	asprintf (&env, "CONFBASE=%s", confbase);	84	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
63	putenv (env);
64	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
65	putenv (env);
66	asprintf (&env, "NODEID=%d", THISNODE->id);
67	putenv (env);
68	asprintf (&env, "IFNAME=%s", tap->interface ());	85	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
69	putenv (env);	86	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		87	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
70	asprintf (&env, "MTU=%d", mtu);	88	asprintf (&env, "MTU=%d", mtu); putenv (env);
71	putenv (env);	89	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
72	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	90	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
73	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
74	THISNODE->id & 0xff);
75	putenv (env);
76		91
		92	conns [THISNODE->id - 1]->script_init_env ("");
		93
		94	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		95	{
		96	char ext[16];
		97	snprintf (ext, 16, "_%d", (*c)->conf->id);
		98	(*c)->script_init_env (ext);
		99	}
		100	}
		101
		102	inline const char *
		103	vpn::script_if_init ()
		104	{
		105	script_init_env ();
		106
		107	return tap->if_up ();
		108	}
		109
		110	inline const char *
		111	vpn::script_if_up ()
		112	{
		113	script_init_env ();
		114
		115	char *filename;
		116	asprintf (&filename,
		117	"%s/%s",
		118	confbase,
77	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	119	::conf.script_if_up ? ::conf.script_if_up : "if-up");
		120
		121	return filename;
		122	}
		123
		124	int
		125	vpn::setup_socket (u8 prot, int family, int type, int proto)
		126	{
		127	int fd = socket (family, type, proto);
		128
		129	if (fd < 0)
		130	{
		131	slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno));
		132	return fd;
		133	}
		134
		135	fcntl (fd, F_SETFL, O_NONBLOCK);
		136	fcntl (fd, F_SETFD, FD_CLOEXEC);
		137
		138	#ifdef SO_MARK
		139	if (::conf.nfmark)
		140	if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark))
		141	slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno));
		142	#endif
		143
		144	return fd;
78	}	145	}
79		146
80	int	147	int
81	vpn::setup ()	148	vpn::setup ()
82	{	149	{
		150	int success = 0;
		151
		152	ipv4_tos = -1;
		153	ipv4_fd = -1;
		154
		155	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
		156	{
		157	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
		158
		159	if (ipv4_fd < 0)
		160	return -1;
		161
		162	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		163	// this I really consider a linux bug. I am neither connected
		164	// nor do I fragment myself. Linux still sets DF and doesn't
		165	// fragment for me sometimes.
		166	{
		167	int oval = IP_PMTUDISC_DONT;
		168	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		169	}
		170	#endif
		171
		172	sockinfo si (THISNODE, PROT_IPv4);
		173
		174	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
		175	{
		176	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
		177	return -1;
		178	}
		179
		180	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		181	++success;
		182	}
		183	else
		184	THISNODE->protocols &= ~PROT_IPv4;
		185
		186	udpv4_tos = -1;
83	udpv4_fd = -1;	187	udpv4_fd = -1;
84		188
85	if (THISNODE->protocols & PROT_UDPv4)	189	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
86	{	190	{
87	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	191	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
88		192
89	if (udpv4_fd < 0)	193	if (udpv4_fd < 0)
90	return -1;	194	return -1;
91		195
92	sockinfo si (THISNODE, PROT_UDPv4);	196	// standard daemon practise...
93
94	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
95	{	197	{
96	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	198	int oval = 1;
97	exit (1);	199	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
98	}	200	}
99		201
100	#ifdef IP_MTU_DISCOVER	202	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
101	// this I really consider a linux bug. I am neither connected	203	// this I really consider a linux bug. I am neither connected
102	// nor do I fragment myself. Linux still sets DF and doesn't	204	// nor do I fragment myself. Linux still sets DF and doesn't
103	// fragment for me sometimes.	205	// fragment for me sometimes.
104	{	206	{
105	int oval = IP_PMTUDISC_DONT;	207	int oval = IP_PMTUDISC_DONT;
106	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	208	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
107	}	209	}
108	#endif	210	#endif
109		211
110	// standard daemon practise...	212	sockinfo si (THISNODE, PROT_UDPv4);
		213
		214	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
		215	{
		216	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		217	return -1;
		218	}
		219
		220	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		221	++success;
		222	}
		223	else
		224	THISNODE->protocols &= ~PROT_UDPv4;
		225
		226	icmpv4_tos = -1;
		227	icmpv4_fd = -1;
		228
		229	#if ENABLE_ICMP
		230	if (THISNODE->protocols & PROT_ICMPv4)
		231	{
		232	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
		233
		234	if (icmpv4_fd < 0)
		235	return -1;
		236
		237	#ifdef ICMP_FILTER
111	{	238	{
112	int oval = 1;	239	icmp_filter oval;
		240	oval.data = 0xffffffff;
		241	if (::conf.icmp_type < 32)
		242	oval.data &= ~(1 << ::conf.icmp_type);
		243
113	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	244	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
114	}	245	}
		246	#endif
115		247
116	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	248	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
117	}
118
119	ipv4_fd = -1;
120	if (THISNODE->protocols & PROT_IPv4)
121	{
122	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
123
124	if (ipv4_fd < 0)
125	return -1;
126
127	sockinfo si (THISNODE, PROT_IPv4);
128
129	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
130	{
131	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
132	exit (1);
133	}
134
135	#ifdef IP_MTU_DISCOVER
136	// this I really consider a linux bug. I am neither connected	249	// this I really consider a linux bug. I am neither connected
137	// nor do I fragment myself. Linux still sets DF and doesn't	250	// nor do I fragment myself. Linux still sets DF and doesn't
138	// fragment for me sometimes.	251	// fragment for me sometimes.
139	{	252	{
140	int oval = IP_PMTUDISC_DONT;	253	int oval = IP_PMTUDISC_DONT;
141	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	254	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
142	}	255	}
143	#endif	256	#endif
144		257
		258	sockinfo si (THISNODE, PROT_ICMPv4);
		259
		260	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
		261	{
		262	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		263	return -1;
		264	}
		265
145	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	266	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		267	++success;
146	}	268	}
		269	#endif
		270
		271	tcpv4_fd = -1;
147		272
148	#if ENABLE_TCP	273	#if ENABLE_TCP
149	if (THISNODE->protocols & PROT_TCPv4)	274	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
150	{	275	{
151	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	276	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
152		277
153	if (tcpv4_fd < 0)	278	if (tcpv4_fd < 0)
154	return -1;	279	return -1;
155
156	sockinfo si (THISNODE, PROT_TCPv4);
157
158	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
159	{
160	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
161	exit (1);
162	}
163
164	if (listen (tcpv4_fd, 5))
165	{
166	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
167	exit (1);
168	}
169		280
170	// standard daemon practise...	281	// standard daemon practise...
171	{	282	{
172	int oval = 1;	283	int oval = 1;
173	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	284	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
174	}	285	}
175		286
		287	sockinfo si (THISNODE, PROT_TCPv4);
		288
		289	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
		290	{
		291	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		292	return -1;
		293	}
		294
		295	if (listen (tcpv4_fd, 5))
		296	{
		297	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		298	return -1;
		299	}
		300
176	tcpv4_accept_watcher.start (tcpv4_fd, POLLIN);	301	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		302	++success;
		303	}
		304	else
		305	THISNODE->protocols &= ~PROT_TCPv4;
		306	#endif
		307
		308	dnsv4_tos = -1;
		309	dnsv4_fd = -1;
		310
		311	#if ENABLE_DNS
		312	if (THISNODE->protocols & PROT_DNSv4)
		313	{
		314	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		315
		316	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		317
		318	if (dnsv4_fd < 0)
		319	return -1;
		320
		321	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		322	// this I really consider a linux bug. I am neither connected
		323	// nor do I fragment myself. Linux still sets DF and doesn't
		324	// fragment for me sometimes.
		325	{
		326	int oval = IP_PMTUDISC_DONT;
		327	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
177	}	328	}
178	#endif	329	# endif
		330
		331	// standard daemon practise...
		332	{
		333	int oval = 1;
		334	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		335	}
		336
		337	sockinfo si (THISNODE->dns_hostname,
		338	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		339	PROT_DNSv4);
		340
		341	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		342	{
		343	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		344	return -1;
		345	}
		346
		347	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		348	++success;
		349	}
		350	#endif
		351
		352	/////////////////////////////////////////////////////////////////////////////
		353
		354	if (!success)
		355	{
		356	slog (L_ERR, _("no protocols enabled."));
		357	return -1;
		358	}
		359
		360	reconnect_all ();
		361
		362	/////////////////////////////////////////////////////////////////////////////
179		363
180	tap = new tap_device ();	364	tap = new tap_device ();
181	if (!tap) //D this, of course, never catches	365	if (!tap) //D this, of course, never catches
182	{	366	{
183	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	367	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
184	exit (1);	368	return -1;
185	}	369	}
186		370
187	run_script (run_script_cb (this, &vpn::script_if_up), true);	371	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
188		372
		373	run_script_cb cb;
		374	cb.set<vpn, &vpn::script_if_init> (this);
		375
		376	if (tap->if_up () &&
		377	!run_script (cb, true))
		378	{
		379	slog (L_ERR, _("interface initialization command '%s' failed."),
		380	tap->if_up ());
		381	return -1;
		382	}
		383
		384	cb.set<vpn, &vpn::script_if_up> (this);
		385	if (!run_script (cb, true))
		386	{
		387	slog (L_ERR, _("if-up command execution failed."));
		388	return -1;
		389	}
		390
189	tap_ev_watcher.start (tap->fd, POLLIN);	391	tap_ev_watcher.start (tap->fd, EV_READ);
190
191	reconnect_all ();
192		392
193	return 0;	393	return 0;
194	}	394	}
195		395
		396	bool
		397	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		398	{
		399	set_tos (ipv4_fd, ipv4_tos, tos);
		400	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		401
		402	return true;
		403	}
		404
		405	static u16
		406	ipv4_checksum (u16 *data, unsigned int len)
		407	{
		408	// use 32 bit accumulator and fold back carry bits at the end
		409	u32 sum = 0;
		410
		411	while (len > 1)
		412	{
		413	sum += *data++;
		414	len -= 2;
		415	}
		416
		417	// odd byte left?
		418	if (len)
		419	sum += (u8 )data;
		420
		421	// add back carry bits
		422	sum = (sum >> 16) + (sum & 0xffff); // lo += hi
		423	sum += (sum >> 16); // carry
		424
		425	return ~sum;
		426	}
		427
		428	#if ENABLE_ICMP
		429	bool
		430	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		431	{
		432	pkt->unshift_hdr (4);
		433
		434	icmp_header hdr = (icmp_header )&((*pkt)[0]);
		435	hdr->type = ::conf.icmp_type;
		436	hdr->code = 255;
		437	hdr->checksum = 0;
		438	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
		439
		440	set_tos (icmpv4_fd, icmpv4_tos, tos);
		441	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		442
		443	return true;
		444	}
		445	#endif
		446
		447	bool
		448	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		449	{
		450	set_tos (udpv4_fd, udpv4_tos, tos);
		451	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		452
		453	return true;
		454	}
		455
196	void	456	void
197	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	457	vpn::inject_data_packet (tap_packet *pkt, int dst)
198	{	458	{
199	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	459	if (dst)
200	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	460	{
201	}	461	// unicast
202		462	if (dst != THISNODE->id)
203	void	463	conns[dst - 1]->inject_data_packet (pkt);
204	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	464	}
205	{	465	else
206	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	466	{
207	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	467	// broadcast, this is ugly, but due to the security policy
		468	// we have to connect to all hosts...
		469	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		470	if ((*c)->conf != THISNODE)
		471	(*c)->inject_data_packet (pkt);
		472	}
208	}	473	}
209		474
210	void	475	void
211	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	476	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
212	{	477	{
213	unsigned int src = pkt->src ();	478	unsigned int src = pkt->src ();
214	unsigned int dst = pkt->dst ();	479	unsigned int dst = pkt->dst ();
215		480
216	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	481	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
217	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	482	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
218		483
219	if (src == 0 \|\| src > conns.size ()	484	if (src == 0 \|\| src > conns.size ()
220	\|\| dst > conns.size ()	485	\|\| dst > conns.size ()
221	\|\| pkt->typ () >= vpn_packet::PT_MAX)	486	\|\| pkt->typ () >= vpn_packet::PT_MAX)
222	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	487	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
		488	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
		489	else if (dst > conns.size ())
		490	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
223	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	491	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
224	else	492	else
225	{	493	{
226	connection *c = conns[src - 1];	494	connection *c = conns[src - 1];
227		495
228	if (dst == 0 && !THISNODE->routerprio)	496	if (dst == 0)
229	slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),	497	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
230	c->conf->nodename, (const char *)rsi);	498	c->conf->nodename, (const char *)rsi);
231	else if (dst != 0 && dst != THISNODE->id)	499	else if (dst != THISNODE->id)
232	// FORWARDING NEEDED ;)	500	{
		501	if (THISNODE->routerprio)
		502	// the tos setting gets lost here. who cares.
		503	conns[dst - 1]->inject_vpn_packet (pkt);
		504	else
233	slog (L_WARN,	505	slog (L_WARN,
234	_("received frame for node %d ('%s') from %s, but this is node %d ('%s')"),	506	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
		507	c->conf->nodename, (const char *)rsi,
235	dst, conns[dst - 1]->conf->nodename,	508	conns[dst - 1]->conf->nodename);
236	(const char *)rsi,	509	}
237	THISNODE->id, THISNODE->nodename);
238	else	510	else
239	c->recv_vpn_packet (pkt, rsi);	511	c->recv_vpn_packet (pkt, rsi);
240	}	512	}
241	}	513	}
242		514
243	void	515	bool
244	vpn::udpv4_ev (int fd, short revents)	516	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
245	{	517	{
246	if (revents & (POLLIN \| POLLERR))	518	switch (si.prot)
		519	{
		520	case PROT_IPv4:
		521	return send_ipv4_packet (pkt, si, tos);
		522
		523	case PROT_UDPv4:
		524	return send_udpv4_packet (pkt, si, tos);
		525
		526	#if ENABLE_TCP
		527	case PROT_TCPv4:
		528	return send_tcpv4_packet (pkt, si, tos);
		529	#endif
		530	#if ENABLE_ICMP
		531	case PROT_ICMPv4:
		532	return send_icmpv4_packet (pkt, si, tos);
		533	#endif
		534	#if ENABLE_DNS
		535	case PROT_DNSv4:
		536	return send_dnsv4_packet (pkt, si, tos);
		537	#endif
		538	default:
		539	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		540	}
		541
		542	return false;
		543	}
		544
		545	inline void
		546	vpn::ipv4_ev (ev::io &w, int revents)
		547	{
		548	if (revents & EV_READ)
247	{	549	{
248	vpn_packet *pkt = new vpn_packet;	550	vpn_packet *pkt = new vpn_packet;
249	struct sockaddr_in sa;	551	struct sockaddr_in sa;
250	socklen_t sa_len = sizeof (sa);	552	socklen_t sa_len = sizeof (sa);
251	int len;	553	int len;
252		554
253	len = recvfrom (fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	555	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
254		556
255	sockinfo si(sa);	557	sockinfo si(sa, PROT_IPv4);
256		558
257	if (len > 0)	559	if (len > 0)
258	{	560	{
259	pkt->len = len;	561	pkt->len = len;
260		562
		563	// raw sockets deliver the ipv4 header, but don't expect it on sends
		564	pkt->skip_hdr (pkt->ipv4_hdr_len ());
		565
261	recv_vpn_packet (pkt, si);	566	recv_vpn_packet (pkt, si);
262	}	567	}
263	else	568	else
264	{	569	{
265	// probably ECONNRESET or somesuch	570	// probably ECONNRESET or somesuch
266	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	571	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
267	}	572	}
268		573
269	delete pkt;	574	delete pkt;
270	}	575	}
271	else if (revents & POLLHUP)
272	{
273	// this cannot ;) happen on udp sockets
274	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
275	exit (1);
276	}
277	else	576	else
278	{	577	{
279	slog (L_ERR,	578	slog (L_ERR,
280	_("FATAL: unknown revents %08x in socket, terminating\n"),	579	_("FATAL: unknown revents %08x in socket, exiting.\n"),
281	revents);	580	revents);
282	exit (1);	581	exit (EXIT_FAILURE);
283	}	582	}
284	}	583	}
285		584
286	void	585	#if ENABLE_ICMP
287	vpn::ipv4_ev (int fd, short revents)	586	inline void
		587	vpn::icmpv4_ev (ev::io &w, int revents)
288	{	588	{
289	if (revents & (POLLIN \| POLLERR))	589	if (revents & EV_READ)
290	{	590	{
291	vpn_packet *pkt = new vpn_packet;	591	vpn_packet *pkt = new vpn_packet;
292	struct sockaddr_in sa;	592	struct sockaddr_in sa;
293	socklen_t sa_len = sizeof (sa);	593	socklen_t sa_len = sizeof (sa);
294	int len;	594	int len;
295		595
296	len = recvfrom (fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	596	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
297		597
298	sockinfo si(sa, PROT_IPv4);	598	sockinfo si(sa, PROT_ICMPv4);
299		599
300	if (len > 0)	600	if (len > 0)
301	{	601	{
302	pkt->len = len;	602	pkt->len = len;
303		603
		604	icmp_header hdr = (icmp_header )&((*pkt)[IP_OVERHEAD]);
		605
		606	if (hdr->type == ::conf.icmp_type
		607	&& hdr->code == 255)
		608	{
304	// raw sockets deliver the ipv4, but don't expect it on sends	609	// raw sockets deliver the ipv4, but don't expect it on sends
305	// this is slow, but...	610	// this is slow, but...
306	pkt->skip_hdr (IP_OVERHEAD);	611	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
307		612
308	recv_vpn_packet (pkt, si);	613	recv_vpn_packet (pkt, si);
		614	}
309	}	615	}
310	else	616	else
311	{	617	{
312	// probably ECONNRESET or somesuch	618	// probably ECONNRESET or somesuch
313	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	619	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
314	}	620	}
315		621
316	delete pkt;	622	delete pkt;
317	}	623	}
318	else if (revents & POLLHUP)
319	{
320	// this cannot ;) happen on udp sockets
321	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
322	exit (1);
323	}
324	else	624	else
325	{	625	{
326	slog (L_ERR,	626	slog (L_ERR,
327	_("FATAL: unknown revents %08x in socket, terminating\n"),	627	_("FATAL: unknown revents %08x in socket, exiting.\n"),
328	revents);	628	revents);
329	exit (1);	629	exit (EXIT_FAILURE);
330	}
331	}
332
333	#if ENABLE_TCP
334
335	struct tcp_info {
336	int fd;
337	bool ok;
338	io_watcher r;
339
340	tcp_info (vpn *v)
341	: r(v, &vpn::tcpv4_ev)
342	{	630	}
343	fd = -1;	631	}
		632	#endif
		633
		634	inline void
		635	vpn::udpv4_ev (ev::io &w, int revents)
		636	{
		637	if (revents & EV_READ)
344	}	638	{
345		639	vpn_packet *pkt = new vpn_packet;
346	~tcp_info () { close (fd); }
347	};
348
349	typedef map<sockinfo, tcp_info *> tcp_si_map;
350	typedef map<int, tcp_info *> tcp_fd_map; // unneecssary if iom would be cooler
351	static tcp_si_map tcp_si;
352	static tcp_fd_map tcp_fd;
353
354	void
355	vpn::send_tcpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
356	{
357	tcp_si_map::iterator info = tcp_si.find (si);
358
359	if (info == tcp_si.end ())
360	{
361	// woaw, the first lost packet ;)
362	tcp_info *i = new tcp_info (this);
363
364	i->ok = false;
365	i->fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
366
367	if (i->fd >= 0)
368	{
369	fcntl (i->fd, F_SETFL, O_NONBLOCK);
370
371	if (connect (i->fd, si.sav4 (), si.salenv4 ()) >= 0
372	\|\| errno == EINPROGRESS)
373	{
374	tcp_si.insert (tcp_si_map::value_type (si, i));
375	tcp_fd.insert (tcp_fd_map::value_type (i->fd, i));
376	return;
377	}
378
379	delete i;
380	}
381	}
382	else
383	{
384	tcp_info *i = info->second;
385
386	if (i->ok)
387	{
388	setsockopt (i->fd, SOL_IP, IP_TOS, &tos, sizeof tos);
389
390	if (write (i->fd, (void *)pkt, pkt->len + sizeof (u32)) != pkt->len + sizeof (u32))
391	{
392	// error, close socket, forget it and retry immediately
393	tcp_si.erase (info);
394	tcp_fd.erase (i->fd);
395	delete i;
396
397	// tail recursion is... better than goto(?)
398	send_tcpv4_packet (pkt, si, tos);
399	}
400	}
401	}
402
403	#if 0
404	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
405	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
406	#endif
407	}
408
409	void
410	vpn::tcpv4_accept (int fd, short revents)
411	{
412	if (revents & (POLLIN \| POLLERR))
413	{
414	struct sockaddr_in sa;	640	struct sockaddr_in sa;
415	socklen_t sa_len = sizeof (sa);	641	socklen_t sa_len = sizeof (sa);
416	int len;	642	int len;
417		643
418	fd = accept (fd, (sockaddr *)&sa, &sa_len);	644	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
419		645
420	if (fd >= 0)
421	{
422	fcntl (fd, F_SETFL, O_NONBLOCK);
423
424	sockinfo si(sa, PROT_TCPv4);	646	sockinfo si(sa, PROT_UDPv4);
425	tcp_info *i = new tcp_info (this);
426		647
427	i->fd = fd;	648	if (len > 0)
428	i->ok = true;
429	i->r.start (fd, POLLIN);
430
431	tcp_si.insert (tcp_si_map::value_type (si, i));
432	tcp_fd.insert (tcp_fd_map::value_type (fd, i));
433	}	649	{
434	}	650	pkt->len = len;
435	}
436		651
437	void	652	recv_vpn_packet (pkt, si);
438	vpn::tcpv4_ev (int fd, short revents)
439	{
440	if (revents & (POLLIN \| POLLERR))
441	{
442	tcp_fd_map::iterator info = tcp_fd.find (fd);
443
444	if (info != tcp_fd.end ())
445	{	653	}
446	tcp_info *i = info->second;	654	else
447
448	if (!i->ok) // not yet established
449	{
450	i->ok = true;
451	fcntl (i->fd, F_SETFL, 0);
452	}
453
454	u32 len;
455
456	if (sizeof (len) == read (fd, &len, sizeof (len)))
457	{
458	slog (L_ERR, "%d bytes received\n", len);
459	}
460
461	//tcp_si.erase (i);
462	tcp_fd.erase (fd);
463	delete i;
464	}	655	{
		656	// probably ECONNRESET or somesuch
		657	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
		658	}
		659
		660	delete pkt;
		661	}
		662	else
465	}	663	{
		664	slog (L_ERR,
		665	_("FATAL: unknown revents %08x in socket, exiting.\n"),
		666	revents);
		667	exit (EXIT_FAILURE);
		668	}
466	}	669	}
467		670
468	#endif	671	inline void
469		672	vpn::tap_ev (ev::io &w, int revents)
470	void
471	vpn::tap_ev (int fd, short revents)
472	{	673	{
473	if (revents & POLLIN)	674	if (revents & EV_READ)
474	{	675	{
475	/* process data */	676	/* process data */
476	tap_packet *pkt;	677	tap_packet *pkt;
477		678
478	pkt = tap->recv ();	679	pkt = tap->recv ();
479		680
		681	if (!pkt)
		682	return;
		683
		684	if (pkt->len > 14)
		685	{
480	int dst = mac2id (pkt->dst);	686	int dst = mac2id (pkt->dst);
481	int src = mac2id (pkt->src);	687	int src = mac2id (pkt->src);
482		688
483	if (src != THISNODE->id)	689	if (src != THISNODE->id)
484	{
485	slog (L_ERR, _("FATAL: tap packet not originating on current node received, terminating."));
486	exit (1);
487	}
488
489	if (dst == THISNODE->id)
490	{
491	slog (L_ERR, _("FATAL: tap packet destined for current node received, terminating."));
492	exit (1);
493	}
494
495	if (dst > conns.size ())
496	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
497	else
498	{
499	if (dst)
500	{	690	{
501	// unicast	691	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
502	if (dst != THISNODE->id)	692	exit (EXIT_FAILURE);
503	conns[dst - 1]->inject_data_packet (pkt);
504	}	693	}
		694
		695	if (dst == THISNODE->id)
		696	{
		697	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		698	exit (EXIT_FAILURE);
		699	}
		700
		701	if (dst > conns.size ())
		702	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
505	else	703	else
506	{
507	// broadcast, first check router, then self, then english
508	connection *router = find_router ();
509
510	if (router)
511	router->inject_data_packet (pkt, true);	704	inject_data_packet (pkt, dst);
512	else
513	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
514	if ((*c)->conf != THISNODE)
515	(*c)->inject_data_packet (pkt);
516	}
517	}	705	}
518		706
519	delete pkt;	707	delete pkt;
520	}
521	else if (revents & (POLLHUP \| POLLERR))
522	{
523	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
524	exit (1);
525	}	708	}
526	else	709	else
527	abort ();	710	abort ();
528	}	711	}
529		712
530	void	713	inline void
531	vpn::event_cb (tstamp &ts)	714	vpn::event_cb (ev::timer &w, int)
532	{	715	{
533	if (events)	716	if (events)
534	{	717	{
535	if (events & EVENT_SHUTDOWN)	718	if (events & EVENT_SHUTDOWN)
536	{	719	{
537	slog (L_INFO, _("preparing shutdown..."));	720	slog (L_INFO, _("preparing shutdown..."));
538		721
539	shutdown_all ();	722	shutdown_all ();
540
541	remove_pid (pidfilename);	723	remove_pid (conf.pidfilename);
542
543	slog (L_INFO, _("terminating"));	724	slog (L_INFO, _("exiting."));
544		725	exit (EXIT_SUCCESS);
545	exit (0);
546	}	726	}
547		727
548	if (events & EVENT_RECONNECT)	728	if (events & EVENT_RECONNECT)
549	{	729	{
550	slog (L_INFO, _("forced reconnect"));	730	slog (L_INFO, _("forced reconnect."));
551		731
552	reconnect_all ();	732	reconnect_all ();
553	}	733	}
554		734
555	events = 0;	735	events = 0;
556	}	736	}
557
558	ts = TSTAMP_CANCEL;
559	}	737	}
560		738
561	void	739	void
562	vpn::shutdown_all ()	740	vpn::shutdown_all ()
563	{	741	{
573		751
574	conns.clear ();	752	conns.clear ();
575		753
576	connection_init ();	754	connection_init ();
577		755
578	for (configuration::node_vector::iterator i = conf.nodes.begin ();	756	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
579	i != conf.nodes.end (); ++i)	757	conns.push_back (new connection (this, *i));
580	{
581	connection *conn = new connection (this);
582		758
583	conn->conf = *i;	759	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
584	conns.push_back (conn);
585
586	conn->establish_connection ();	760	(*c)->establish_connection ();
587	}
588	}	761	}
589		762
590	connection *vpn::find_router ()	763	bool
		764	vpn::can_direct (conf_node src, conf_node dst) const
591	{	765	{
592	u32 prio = 0;	766	return src != dst
		767	&& src->may_direct (dst)
		768	&& dst->may_direct (src)
		769	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		770	\|\| (src->protocols & dst->connectable_protocols ()));
		771	}
		772
		773	// only works for indirect and routed connections: find a router
		774	// from THISNODE to dst
		775	connection *
		776	vpn::find_router_for (const connection *dst)
		777	{
593	connection *router = 0;	778	connection *router = 0;
594		779
		780	// first try to find a router with a direct connection, route there
		781	// regardless of any other considerations.
		782	{
		783	u32 prio = 1;
		784
		785	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		786	{
		787	connection c = i;
		788
		789	if (c->conf->routerprio > prio
		790	&& c->conf != THISNODE
		791	&& can_direct (c->conf, dst->conf)
		792	&& c->ictx && c->octx)
		793	{
		794	prio = c->conf->routerprio;
		795	router = c;
		796	}
		797	}
		798	}
		799
		800	if (router)
		801	return router;
		802
		803	// second try find the router with the highest priority, higher than ours
		804	{
		805	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		806
		807	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		808	{
		809	connection c = i;
		810
		811	if (c->conf->routerprio > prio
		812	&& c != dst
		813	&& c->conf != THISNODE
		814	&& c->ictx && c->octx)
		815	{
		816	prio = c->conf->routerprio;
		817	router = c;
		818	}
		819	}
		820	}
		821
		822	return router;
		823	}
		824
		825	void
		826	vpn::connection_established (connection *c)
		827	{
595	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	828	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
596	{	829	{
597	connection c = i;	830	connection o = i;
598		831
599	if (c->conf->routerprio > prio	832	if (!o->is_direct
600	&& c->connectmode == conf_node::C_ALWAYS	833	&& o->si.valid ()
601	&& c->conf != THISNODE	834	&& c->si != o->si
602	&& c->ictx && c->octx)	835	&& c == find_router_for (o))
603	{
604	prio = c->conf->routerprio;
605	router = c;
606	}	836	{
		837	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		838	o->conf->nodename, c->conf->nodename);
		839	o->rekey ();
		840	}
607	}	841	}
608
609	return router;
610	}	842	}
611		843
612	void vpn::connect_request (int id)	844	void
		845	vpn::send_connect_request (connection *c)
613	{	846	{
614	connection *c = find_router ();	847	connection *r = find_router_for (c);
615		848
616	if (c)	849	if (r)
		850	{
		851	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		852	c->conf->nodename, r->conf->nodename);
617	c->connect_request (id);	853	r->send_connect_request (c->conf->id);
618	//else // does not work, because all others must connect to the same router	854	}
619	// // no router found, aggressively connect to all routers	855	else
620	// for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	856	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
621	// if ((*i)->conf->routerprio)	857	c->conf->nodename);
622	// (*i)->establish_connection ();
623	}	858	}
624		859
625	void	860	void
626	connection::dump_status ()	861	connection::dump_status ()
627	{	862	{
628	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	863	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
629	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	864	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
630	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	865	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
631	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	866	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
632	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	867	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
633	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
634	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
635	}	868	}
636		869
637	void	870	void
638	vpn::dump_status ()	871	vpn::dump_status ()
639	{	872	{
640	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	873	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
641		874
642	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	875	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
643	(*c)->dump_status ();	876	(*c)->dump_status ();
644		877
645	slog (L_NOTICE, _("END status dump"));	878	slog (L_NOTICE, _("END status dump"));
646	}	879	}
647		880
648	vpn::vpn (void)	881	vpn::vpn (void)
649	: event(this, &vpn::event_cb)	882	{
		883	event .set<vpn, &vpn::event_cb > (this);
650	, udpv4_ev_watcher(this, &vpn::udpv4_ev)	884	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
651	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	885	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
652	, tap_ev_watcher (this, &vpn::tap_ev)
653	#if ENABLE_TCP	886	#if ENABLE_TCP
654	, tcpv4_accept_watcher(this, &vpn::tcpv4_accept)	887	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
655	#endif	888	#endif
656	{	889	#if ENABLE_ICMP
		890	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
		891	#endif
		892	#if ENABLE_DNS
		893	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		894	#endif
		895	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
657	}	896	}
658		897
659	vpn::~vpn ()	898	vpn::~vpn ()
660	{	899	{
661	}	900	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.2 by pcg, Wed Apr 2 05:15:00 2003 UTC vs. Revision 1.60 by root, Fri Sep 16 18:01:27 2011 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.2 by pcg, Wed Apr 2 05:15:00 2003 UTC vs.
Revision 1.60 by root, Fri Sep 16 18:01:27 2011 UTC