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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.11 by pcg, Sun Apr 13 00:35:46 2003 UTC vs.
Revision 1.62 by root, Sat Dec 17 22:05:34 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 <errno.h>	43	#include <errno.h>
32	#include <time.h>	44	#include <time.h>
33	#include <unistd.h>	45	#include <unistd.h>
34	#include <fcntl.h>	46	#include <fcntl.h>
35	#include <arpa/inet.h>	47	#include <sys/socket.h>
36	#include <netinet/in.h>	48
37	#include <netinet/ip_icmp.h>	49	#include "netcompat.h"
38		50
39	#include "pidfile.h"	51	#include "pidfile.h"
40		52
41	#include "connection.h"	53	#include "connection.h"
42	#include "util.h"	54	#include "util.h"
43	#include "vpn.h"	55	#include "vpn.h"
44		56
		57	vpn network; // THE vpn (bad design...)
		58
45	/////////////////////////////////////////////////////////////////////////////	59	/////////////////////////////////////////////////////////////////////////////
46		60
47	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 ()
48	{	75	{
49	// the tunnel device mtu should be the physical mtu - overhead	76	// the tunnel device mtu should be the physical mtu - overhead
50	// the tricky part is rounding to the cipher key blocksize	77	// the tricky part is rounding to the cipher key blocksize
51	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	78	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
52	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	79	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
53	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	80	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
54	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	81	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
55		82
56	char *env;	83	char *env;
57	asprintf (&env, "CONFBASE=%s", confbase);	84	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 ());	85	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
64	putenv (env);	86	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		87	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
65	asprintf (&env, "MTU=%d", mtu);	88	asprintf (&env, "MTU=%d", mtu); putenv (env);
66	putenv (env);	89	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
67	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	90	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
68	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
69	THISNODE->id & 0xff);
70	putenv (env);
71		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,
72	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;
73	}	145	}
74		146
75	int	147	int
76	vpn::setup ()	148	vpn::setup ()
77	{	149	{
		150	int success = 0;
		151
		152	#if 1//D2
		153	ipv42_tos = -1;
78	ipv4_fd = -1;	154	ipv42_fd = -1;
79		155
80	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	156	if (THISNODE->protocols & PROT_IPv42 && ::conf.ip_proto)
81	{	157	{
82	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	158	ipv42_fd = setup_socket (PROT_IPv42, PF_INET, SOCK_RAW, ::conf.ip2_proto);
83		159
84	if (ipv4_fd < 0)	160	if (ipv42_fd < 0)
85	return -1;	161	return -1;
86		162
87	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	163	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
88
89	#ifdef IP_MTU_DISCOVER
90	// this I really consider a linux bug. I am neither connected	164	// this I really consider a linux bug. I am neither connected
91	// nor do I fragment myself. Linux still sets DF and doesn't	165	// nor do I fragment myself. Linux still sets DF and doesn't
92	// fragment for me sometimes.	166	// fragment for me sometimes.
93	{	167	{
94	int oval = IP_PMTUDISC_DONT;	168	int oval = IP_PMTUDISC_DONT;
95	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	169	setsockopt (ipv42_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
96	}	170	}
97	#endif	171	#endif
98		172
99	sockinfo si (THISNODE, PROT_IPv4);	173	sockinfo si (THISNODE, PROT_IPv42);
100		174
101	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	175	if (bind (ipv42_fd, si.sav4 (), si.salenv4 ()))
102	{	176	{
103	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	177	slog (L_ERR, _("can't bind ipv42 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
104	exit (1);	178	return -1;
105	}	179	}
106		180
107	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	181	ipv42_ev_watcher.start (ipv42_fd, EV_READ);
		182	++success;
108	}	183	}
		184	else
		185	THISNODE->protocols &= ~PROT_IPv42;
		186	#endif
109		187
		188	ipv4_tos = -1;
110	udpv4_fd = -1;	189	ipv4_fd = -1;
111		190
112	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	191	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
113	{	192	{
114	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	193	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
115		194
116	if (udpv4_fd < 0)	195	if (ipv4_fd < 0)
117	return -1;	196	return -1;
118		197
119	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	198	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
120
121	// standard daemon practise...
122	{
123	int oval = 1;
124	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
125	}
126
127	#ifdef IP_MTU_DISCOVER
128	// this I really consider a linux bug. I am neither connected	199	// this I really consider a linux bug. I am neither connected
129	// nor do I fragment myself. Linux still sets DF and doesn't	200	// nor do I fragment myself. Linux still sets DF and doesn't
130	// fragment for me sometimes.	201	// fragment for me sometimes.
131	{	202	{
132	int oval = IP_PMTUDISC_DONT;	203	int oval = IP_PMTUDISC_DONT;
		204	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		205	}
		206	#endif
		207
		208	sockinfo si (THISNODE, PROT_IPv4);
		209
		210	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
		211	{
		212	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
		213	return -1;
		214	}
		215
		216	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		217	++success;
		218	}
		219	else
		220	THISNODE->protocols &= ~PROT_IPv4;
		221
		222	udpv4_tos = -1;
		223	udpv4_fd = -1;
		224
		225	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
		226	{
		227	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		228
		229	if (udpv4_fd < 0)
		230	return -1;
		231
		232	// standard daemon practise...
		233	{
		234	int oval = 1;
		235	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		236	}
		237
		238	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		239	// this I really consider a linux bug. I am neither connected
		240	// nor do I fragment myself. Linux still sets DF and doesn't
		241	// fragment for me sometimes.
		242	{
		243	int oval = IP_PMTUDISC_DONT;
133	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	244	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
134	}	245	}
135	#endif	246	#endif
136		247
137	sockinfo si (THISNODE, PROT_UDPv4);	248	sockinfo si (THISNODE, PROT_UDPv4);
138		249
139	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	250	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
140	{	251	{
141	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	252	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
142	exit (1);	253	return -1;
143	}	254	}
144		255
145	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	256	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		257	++success;
146	}	258	}
		259	else
		260	THISNODE->protocols &= ~PROT_UDPv4;
147		261
		262	icmpv4_tos = -1;
148	icmpv4_fd = -1;	263	icmpv4_fd = -1;
149		264
150	#if ENABLE_ICMP	265	#if ENABLE_ICMP
151	if (THISNODE->protocols & PROT_ICMPv4)	266	if (THISNODE->protocols & PROT_ICMPv4)
152	{	267	{
153	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	268	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
154		269
155	if (icmpv4_fd < 0)	270	if (icmpv4_fd < 0)
156	return -1;	271	return -1;
157
158	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
159		272
160	#ifdef ICMP_FILTER	273	#ifdef ICMP_FILTER
161	{	274	{
162	icmp_filter oval;	275	icmp_filter oval;
163	oval.data = 0xffffffff;	276	oval.data = 0xffffffff;
166		279
167	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);	280	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
168	}	281	}
169	#endif	282	#endif
170		283
171	#ifdef IP_MTU_DISCOVER	284	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
172	// this I really consider a linux bug. I am neither connected	285	// this I really consider a linux bug. I am neither connected
173	// nor do I fragment myself. Linux still sets DF and doesn't	286	// nor do I fragment myself. Linux still sets DF and doesn't
174	// fragment for me sometimes.	287	// fragment for me sometimes.
175	{	288	{
176	int oval = IP_PMTUDISC_DONT;	289	int oval = IP_PMTUDISC_DONT;
177	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	290	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
178	}	291	}
179	#endif	292	#endif
180		293
181	sockinfo si (THISNODE, PROT_ICMPv4);	294	sockinfo si (THISNODE, PROT_ICMPv4);
182		295
183	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	296	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
184	{	297	{
185	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	298	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
186	exit (1);	299	return -1;
187	}	300	}
188		301
189	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	302	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		303	++success;
190	}	304	}
191	#endif	305	#endif
192		306
193	tcpv4_fd = -1;	307	tcpv4_fd = -1;
194		308
195	#if ENABLE_TCP	309	#if ENABLE_TCP
196	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)	310	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
197	{	311	{
198	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	312	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
199		313
200	if (tcpv4_fd < 0)	314	if (tcpv4_fd < 0)
201	return -1;	315	return -1;
202		316
203	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
204
205	// standard daemon practise...	317	// standard daemon practise...
206	{	318	{
207	int oval = 1;	319	int oval = 1;
208	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	320	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
209	}	321	}
210		322
211	sockinfo si (THISNODE, PROT_TCPv4);	323	sockinfo si (THISNODE, PROT_TCPv4);
212		324
213	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	325	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
214	{	326	{
215	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	327	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
216	exit (1);	328	return -1;
217	}	329	}
218		330
219	if (listen (tcpv4_fd, 5))	331	if (listen (tcpv4_fd, 5))
220	{	332	{
221	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	333	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
222	exit (1);	334	return -1;
		335	}
		336
		337	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		338	++success;
		339	}
		340	else
		341	THISNODE->protocols &= ~PROT_TCPv4;
		342	#endif
		343
		344	dnsv4_tos = -1;
		345	dnsv4_fd = -1;
		346
		347	#if ENABLE_DNS
		348	if (THISNODE->protocols & PROT_DNSv4)
		349	{
		350	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		351
		352	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		353
		354	if (dnsv4_fd < 0)
		355	return -1;
		356
		357	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		358	// this I really consider a linux bug. I am neither connected
		359	// nor do I fragment myself. Linux still sets DF and doesn't
		360	// fragment for me sometimes.
		361	{
		362	int oval = IP_PMTUDISC_DONT;
		363	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
223	}	364	}
224
225	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
226	}
227	#endif	365	# endif
		366
		367	// standard daemon practise...
		368	{
		369	int oval = 1;
		370	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		371	}
		372
		373	sockinfo si (THISNODE->dns_hostname,
		374	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		375	PROT_DNSv4);
		376
		377	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		378	{
		379	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		380	return -1;
		381	}
		382
		383	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		384	++success;
		385	}
		386	#endif
		387
		388	/////////////////////////////////////////////////////////////////////////////
		389
		390	if (!success)
		391	{
		392	slog (L_ERR, _("no protocols enabled."));
		393	return -1;
		394	}
		395
		396	reconnect_all ();
		397
		398	/////////////////////////////////////////////////////////////////////////////
228		399
229	tap = new tap_device ();	400	tap = new tap_device ();
230	if (!tap) //D this, of course, never catches	401	if (!tap) //D this, of course, never catches
231	{	402	{
232	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	403	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
233	exit (1);	404	return -1;
234	}	405	}
235		406
236	run_script (run_script_cb (this, &vpn::script_if_up), true);	407	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
237		408
		409	run_script_cb cb;
		410	cb.set<vpn, &vpn::script_if_init> (this);
		411
		412	if (tap->if_up () &&
		413	!run_script (cb, true))
		414	{
		415	slog (L_ERR, _("interface initialization command '%s' failed."),
		416	tap->if_up ());
		417	return -1;
		418	}
		419
		420	cb.set<vpn, &vpn::script_if_up> (this);
		421	if (!run_script (cb, true))
		422	{
		423	slog (L_ERR, _("if-up command execution failed."));
		424	return -1;
		425	}
		426
238	tap_ev_watcher.start (tap->fd, POLLIN);	427	tap_ev_watcher.start (tap->fd, EV_READ);
239
240	reconnect_all ();
241		428
242	return 0;	429	return 0;
243	}
244
245	// send a vpn packet out to other hosts
246	bool
247	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
248	{
249	switch (si.prot)
250	{
251	case PROT_IPv4:
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;
270	}
271	}	430	}
272		431
273	bool	432	bool
274	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	433	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
275	{	434	{
276	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	435	set_tos (ipv4_fd, ipv4_tos, tos);
277	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	436	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
278		437
279	return true;	438	return true;
280	}	439	}
		440
		441	#if 1 //D
		442	bool
		443	vpn::send_ipv42_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		444	{
		445	set_tos (ipv42_fd, ipv42_tos, tos);
		446	sendto (ipv42_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		447
		448	return true;
		449	}
		450	#endif
281		451
282	static u16	452	static u16
283	ipv4_checksum (u16 *data, unsigned int len)	453	ipv4_checksum (u16 *data, unsigned int len)
284	{	454	{
285	// use 32 bit accumulator and fold back carry bits at the end	455	// use 32 bit accumulator and fold back carry bits at the end
…		…
300	sum += (sum >> 16); // carry	470	sum += (sum >> 16); // carry
301		471
302	return ~sum;	472	return ~sum;
303	}	473	}
304		474
		475	#if ENABLE_ICMP
305	bool	476	bool
306	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	477	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
307	{	478	{
308	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
309
310	pkt->unshift_hdr (4);	479	pkt->unshift_hdr (4);
311		480
312	icmphdr hdr = (icmphdr )&((*pkt)[0]);	481	icmp_header hdr = (icmp_header )&((*pkt)[0]);
313	hdr->type = ::conf.icmp_type;	482	hdr->type = ::conf.icmp_type;
314	hdr->code = 255;	483	hdr->code = 255;
315	hdr->checksum = 0;	484	hdr->checksum = 0;
316	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	485	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
317		486
		487	set_tos (icmpv4_fd, icmpv4_tos, tos);
318	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	488	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
319		489
320	return true;	490	return true;
321	}	491	}
		492	#endif
322		493
323	bool	494	bool
324	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	495	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
325	{	496	{
326	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	497	set_tos (udpv4_fd, udpv4_tos, tos);
327	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	498	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
328		499
329	return true;	500	return true;
		501	}
		502
		503	void
		504	vpn::inject_data_packet (tap_packet *pkt, int dst)
		505	{
		506	if (dst)
		507	{
		508	// unicast
		509	if (dst != THISNODE->id)
		510	conns[dst - 1]->inject_data_packet (pkt);
		511	}
		512	else
		513	{
		514	// broadcast, this is ugly, but due to the security policy
		515	// we have to connect to all hosts...
		516	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		517	if ((*c)->conf != THISNODE)
		518	(*c)->inject_data_packet (pkt);
		519	}
330	}	520	}
331		521
332	void	522	void
333	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	523	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
334	{	524	{
335	unsigned int src = pkt->src ();	525	unsigned int src = pkt->src ();
336	unsigned int dst = pkt->dst ();	526	unsigned int dst = pkt->dst ();
337		527
338	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	528	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."),
339	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	529	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
340		530
341	if (src == 0 \|\| src > conns.size ()	531	if (src == 0 \|\| src > conns.size ()
342	\|\| dst > conns.size ()	532	\|\| dst > conns.size ()
343	\|\| pkt->typ () >= vpn_packet::PT_MAX)	533	\|\| pkt->typ () >= vpn_packet::PT_MAX)
344	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	534	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
345	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	535	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
346	else if (dst > conns.size ())
347	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
348	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
349	else	536	else
350	{	537	{
351	connection *c = conns[src - 1];	538	connection *c = conns[src - 1];
352		539
353	if (dst == 0 && !THISNODE->routerprio)	540	if (dst == 0)
354	slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),	541	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
355	c->conf->nodename, (const char *)rsi);	542	c->conf->nodename, (const char *)rsi);
356	else if (dst != 0 && dst != THISNODE->id)	543	else if (dst != THISNODE->id)
357	{	544	{
358	if (THISNODE->routerprio)	545	if (THISNODE->routerprio)
359	// the tos setting gets lost here. who cares.	546	// the tos setting gets lost here. who cares.
360	conns[dst - 1]->inject_vpn_packet (pkt);	547	conns[dst - 1]->inject_vpn_packet (pkt);
361	else	548	else
362	slog (L_WARN,	549	slog (L_WARN,
363	_("%s(%s): forwarding request (=> %s), but we are no router"),	550	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
364	c->conf->nodename, (const char *)rsi,	551	c->conf->nodename, (const char *)rsi,
365	conns[dst - 1]->conf->nodename);	552	conns[dst - 1]->conf->nodename);
366	}	553	}
367	else	554	else
368	c->recv_vpn_packet (pkt, rsi);	555	c->recv_vpn_packet (pkt, rsi);
369	}	556	}
370	}	557	}
371		558
372	void	559	bool
		560	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		561	{
		562	switch (si.prot)
		563	{
		564	#if 1//D2
		565	case PROT_IPv42:
		566	return send_ipv42_packet (pkt, si, tos);
		567	#endif
		568
		569	case PROT_IPv4:
		570	return send_ipv4_packet (pkt, si, tos);
		571
		572	case PROT_UDPv4:
		573	return send_udpv4_packet (pkt, si, tos);
		574
		575	#if ENABLE_TCP
		576	case PROT_TCPv4:
		577	return send_tcpv4_packet (pkt, si, tos);
		578	#endif
		579	#if ENABLE_ICMP
		580	case PROT_ICMPv4:
		581	return send_icmpv4_packet (pkt, si, tos);
		582	#endif
		583	#if ENABLE_DNS
		584	case PROT_DNSv4:
		585	return send_dnsv4_packet (pkt, si, tos);
		586	#endif
		587	default:
		588	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		589	}
		590
		591	return false;
		592	}
		593
		594	#if 1//D2
		595	inline void
373	vpn::ipv4_ev (io_watcher &w, short revents)	596	vpn::ipv42_ev (ev::io &w, int revents)
374	{	597	{
375	if (revents & (POLLIN \| POLLERR))	598	if (revents & EV_READ)
376	{	599	{
377	vpn_packet *pkt = new vpn_packet;	600	vpn_packet *pkt = new vpn_packet;
378	struct sockaddr_in sa;	601	struct sockaddr_in sa;
379	socklen_t sa_len = sizeof (sa);	602	socklen_t sa_len = sizeof (sa);
380	int len;	603	int len;
381		604
382	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	605	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
383		606
384	sockinfo si(sa, PROT_IPv4);	607	sockinfo si(sa, PROT_IPv42);
385		608
386	if (len > 0)	609	if (len > 0)
387	{	610	{
388	pkt->len = len;	611	pkt->len = len;
389		612
390	// raw sockets deliver the ipv4, but don't expect it on sends	613	// raw sockets deliver the ipv4 header, but don't expect it on sends
391	// this is slow, but...	614	pkt->skip_hdr (pkt->ipv4_hdr_len ());
392	pkt->skip_hdr (IP_OVERHEAD);
393		615
394	recv_vpn_packet (pkt, si);	616	recv_vpn_packet (pkt, si);
395	}	617	}
396	else	618	else
397	{	619	{
398	// probably ECONNRESET or somesuch	620	// probably ECONNRESET or somesuch
399	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	621	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
400	}	622	}
401		623
402	delete pkt;	624	delete pkt;
403	}	625	}
404	else if (revents & POLLHUP)
405	{
406	// this cannot ;) happen on udp sockets
407	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
408	exit (1);
409	}
410	else	626	else
411	{	627	{
412	slog (L_ERR,	628	slog (L_ERR,
413	_("FATAL: unknown revents %08x in socket, terminating\n"),	629	_("FATAL: unknown revents %08x in socket, exiting.\n"),
414	revents);	630	revents);
415	exit (1);	631	exit (EXIT_FAILURE);
416	}	632	}
417	}	633	}
		634	#endif
418		635
419	void	636	inline void
420	vpn::icmpv4_ev (io_watcher &w, short revents)	637	vpn::ipv4_ev (ev::io &w, int revents)
421	{	638	{
422	if (revents & (POLLIN \| POLLERR))	639	if (revents & EV_READ)
423	{	640	{
424	vpn_packet *pkt = new vpn_packet;	641	vpn_packet *pkt = new vpn_packet;
425	struct sockaddr_in sa;	642	struct sockaddr_in sa;
426	socklen_t sa_len = sizeof (sa);	643	socklen_t sa_len = sizeof (sa);
427	int len;	644	int len;
428		645
429	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	646	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
430		647
		648	sockinfo si(sa, PROT_IPv4);
		649
		650	if (len > 0)
		651	{
		652	pkt->len = len;
		653
		654	// raw sockets deliver the ipv4 header, but don't expect it on sends
		655	pkt->skip_hdr (pkt->ipv4_hdr_len ());
		656
		657	recv_vpn_packet (pkt, si);
		658	}
		659	else
		660	{
		661	// probably ECONNRESET or somesuch
		662	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
		663	}
		664
		665	delete pkt;
		666	}
		667	else
		668	{
		669	slog (L_ERR,
		670	_("FATAL: unknown revents %08x in socket, exiting.\n"),
		671	revents);
		672	exit (EXIT_FAILURE);
		673	}
		674	}
		675
		676	#if ENABLE_ICMP
		677	inline void
		678	vpn::icmpv4_ev (ev::io &w, int revents)
		679	{
		680	if (revents & EV_READ)
		681	{
		682	vpn_packet *pkt = new vpn_packet;
		683	struct sockaddr_in sa;
		684	socklen_t sa_len = sizeof (sa);
		685	int len;
		686
		687	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
		688
431	sockinfo si(sa, PROT_ICMPv4);	689	sockinfo si(sa, PROT_ICMPv4);
432		690
433	if (len > 0)	691	if (len > 0)
434	{	692	{
435	pkt->len = len;	693	pkt->len = len;
436		694
437	icmphdr hdr = (icmphdr )&((*pkt)[IP_OVERHEAD]);	695	icmp_header hdr = (icmp_header )&((*pkt)[IP_OVERHEAD]);
438		696
439	if (hdr->type == ::conf.icmp_type	697	if (hdr->type == ::conf.icmp_type
440	&& hdr->code == 255)	698	&& hdr->code == 255)
441	{	699	{
442	// raw sockets deliver the ipv4, but don't expect it on sends	700	// raw sockets deliver the ipv4, but don't expect it on sends
443	// this is slow, but...	701	// this is slow, but...
444	pkt->skip_hdr (ICMP_OVERHEAD);	702	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
445		703
446	recv_vpn_packet (pkt, si);	704	recv_vpn_packet (pkt, si);
447	}	705	}
448	}	706	}
449	else	707	else
450	{	708	{
451	// probably ECONNRESET or somesuch	709	// probably ECONNRESET or somesuch
452	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	710	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
453	}	711	}
454		712
455	delete pkt;	713	delete pkt;
456	}	714	}
457	else if (revents & POLLHUP)
458	{
459	// this cannot ;) happen on udp sockets
460	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
461	exit (1);
462	}
463	else	715	else
464	{	716	{
465	slog (L_ERR,	717	slog (L_ERR,
466	_("FATAL: unknown revents %08x in socket, terminating\n"),	718	_("FATAL: unknown revents %08x in socket, exiting.\n"),
467	revents);	719	revents);
468	exit (1);	720	exit (EXIT_FAILURE);
469	}	721	}
470	}	722	}
		723	#endif
471		724
472	void	725	inline void
473	vpn::udpv4_ev (io_watcher &w, short revents)	726	vpn::udpv4_ev (ev::io &w, int revents)
474	{	727	{
475	if (revents & (POLLIN \| POLLERR))	728	if (revents & EV_READ)
476	{	729	{
477	vpn_packet *pkt = new vpn_packet;	730	vpn_packet *pkt = new vpn_packet;
478	struct sockaddr_in sa;	731	struct sockaddr_in sa;
479	socklen_t sa_len = sizeof (sa);	732	socklen_t sa_len = sizeof (sa);
480	int len;	733	int len;
…		…
490	recv_vpn_packet (pkt, si);	743	recv_vpn_packet (pkt, si);
491	}	744	}
492	else	745	else
493	{	746	{
494	// probably ECONNRESET or somesuch	747	// probably ECONNRESET or somesuch
495	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	748	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
496	}	749	}
497		750
498	delete pkt;	751	delete pkt;
499	}	752	}
500	else if (revents & POLLHUP)
501	{
502	// this cannot ;) happen on udp sockets
503	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
504	exit (1);
505	}
506	else	753	else
507	{	754	{
508	slog (L_ERR,	755	slog (L_ERR,
509	_("FATAL: unknown revents %08x in socket, terminating\n"),	756	_("FATAL: unknown revents %08x in socket, exiting.\n"),
510	revents);	757	revents);
511	exit (1);	758	exit (EXIT_FAILURE);
512	}	759	}
513	}	760	}
514		761
515	void	762	inline void
516	vpn::tap_ev (io_watcher &w, short revents)	763	vpn::tap_ev (ev::io &w, int revents)
517	{	764	{
518	if (revents & POLLIN)	765	if (revents & EV_READ)
519	{	766	{
520	/* process data */	767	/* process data */
521	tap_packet *pkt;	768	tap_packet *pkt;
522		769
523	pkt = tap->recv ();	770	pkt = tap->recv ();
524		771
		772	if (!pkt)
		773	return;
		774
		775	if (pkt->len > 14)
		776	{
525	int dst = mac2id (pkt->dst);	777	int dst = mac2id (pkt->dst);
526	int src = mac2id (pkt->src);	778	int src = mac2id (pkt->src);
527		779
528	if (src != THISNODE->id)	780	if (src != THISNODE->id)
529	{
530	slog (L_ERR, _("FATAL: tap packet not originating on current node received, terminating."));
531	exit (1);
532	}
533
534	if (dst == THISNODE->id)
535	{
536	slog (L_ERR, _("FATAL: tap packet destined for current node received, terminating."));
537	exit (1);
538	}
539
540	if (dst > conns.size ())
541	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
542	else
543	{
544	if (dst)
545	{	781	{
546	// unicast	782	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
547	if (dst != THISNODE->id)	783	exit (EXIT_FAILURE);
548	conns[dst - 1]->inject_data_packet (pkt);
549	}	784	}
		785
		786	if (dst == THISNODE->id)
		787	{
		788	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		789	exit (EXIT_FAILURE);
		790	}
		791
		792	if (dst > conns.size ())
		793	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
550	else	794	else
551	{
552	// broadcast, first check router, then self, then english
553	connection *router = find_router ();
554
555	if (router)
556	router->inject_data_packet (pkt, true);	795	inject_data_packet (pkt, dst);
557	else
558	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
559	if ((*c)->conf != THISNODE)
560	(*c)->inject_data_packet (pkt);
561	}
562	}	796	}
563		797
564	delete pkt;	798	delete pkt;
565	}	799	}
566	else if (revents & (POLLHUP \| POLLERR))
567	{
568	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
569	exit (1);
570	}
571	else	800	else
572	abort ();	801	abort ();
573	}	802	}
574		803
575	void	804	inline void
576	vpn::event_cb (time_watcher &w)	805	vpn::event_cb (ev::timer &w, int)
577	{	806	{
578	if (events)	807	if (events)
579	{	808	{
580	if (events & EVENT_SHUTDOWN)	809	if (events & EVENT_SHUTDOWN)
581	{	810	{
582	slog (L_INFO, _("preparing shutdown..."));	811	slog (L_INFO, _("preparing shutdown..."));
583		812
584	shutdown_all ();	813	shutdown_all ();
585
586	remove_pid (pidfilename);	814	remove_pid (conf.pidfilename);
587
588	slog (L_INFO, _("terminating"));	815	slog (L_INFO, _("exiting."));
589		816	exit (EXIT_SUCCESS);
590	exit (0);
591	}	817	}
592		818
593	if (events & EVENT_RECONNECT)	819	if (events & EVENT_RECONNECT)
594	{	820	{
595	slog (L_INFO, _("forced reconnect"));	821	slog (L_INFO, _("forced reconnect."));
596		822
597	reconnect_all ();	823	reconnect_all ();
598	}	824	}
599		825
600	events = 0;	826	events = 0;
601	}	827	}
602
603	w.at = TSTAMP_CANCEL;
604	}	828	}
605		829
606	void	830	void
607	vpn::shutdown_all ()	831	vpn::shutdown_all ()
608	{	832	{
…		…
618		842
619	conns.clear ();	843	conns.clear ();
620		844
621	connection_init ();	845	connection_init ();
622		846
623	for (configuration::node_vector::iterator i = conf.nodes.begin ();	847	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
624	i != conf.nodes.end (); ++i)	848	conns.push_back (new connection (this, *i));
625	{
626	connection *conn = new connection (this);
627		849
628	conn->conf = *i;	850	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
629	conns.push_back (conn);
630
631	conn->establish_connection ();	851	(*c)->establish_connection ();
632	}
633	}	852	}
634		853
635	connection *vpn::find_router ()	854	bool
		855	vpn::can_direct (conf_node src, conf_node dst) const
636	{	856	{
637	u32 prio = 0;	857	return src != dst
		858	&& src->may_direct (dst)
		859	&& dst->may_direct (src)
		860	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		861	\|\| (src->protocols & dst->connectable_protocols ()));
		862	}
		863
		864	// only works for indirect and routed connections: find a router
		865	// from THISNODE to dst
		866	connection *
		867	vpn::find_router_for (const connection *dst)
		868	{
638	connection *router = 0;	869	connection *router = 0;
639		870
		871	// first try to find a router with a direct connection, route there
		872	// regardless of any other considerations.
		873	{
		874	u32 prio = 1;
		875
		876	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		877	{
		878	connection c = i;
		879
		880	if (c->conf->routerprio > prio
		881	&& c->conf != THISNODE
		882	&& can_direct (c->conf, dst->conf)
		883	&& c->ictx && c->octx)
		884	{
		885	prio = c->conf->routerprio;
		886	router = c;
		887	}
		888	}
		889	}
		890
		891	if (router)
		892	return router;
		893
		894	// second try find the router with the highest priority, higher than ours
		895	{
		896	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		897
		898	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		899	{
		900	connection c = i;
		901
		902	if (c->conf->routerprio > prio
		903	&& c != dst
		904	&& c->conf != THISNODE
		905	&& c->ictx && c->octx)
		906	{
		907	prio = c->conf->routerprio;
		908	router = c;
		909	}
		910	}
		911	}
		912
		913	return router;
		914	}
		915
		916	void
		917	vpn::connection_established (connection *c)
		918	{
640	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	919	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
641	{	920	{
642	connection c = i;	921	connection o = i;
643		922
644	if (c->conf->routerprio > prio	923	if (!o->is_direct
645	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use	924	&& o->si.valid ()
646	&& c->ictx && c->octx	925	&& c->si != o->si
647	&& c->conf != THISNODE // redundant, since ictx==octx==0 always on thisnode	926	&& c == find_router_for (o))
648	&& (!THISNODE->routerprio
649	\|\| c->conf->routerprio <= THISNODE->routerprio))
650	{
651	prio = c->conf->routerprio;
652	router = c;
653	}	927	{
		928	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		929	o->conf->nodename, c->conf->nodename);
		930	o->rekey ();
		931	}
654	}	932	}
655
656	return router;
657	}	933	}
658		934
		935	void
659	void vpn::send_connect_request (int id)	936	vpn::send_connect_request (connection *c)
660	{	937	{
661	connection *c = find_router ();	938	connection *r = find_router_for (c);
662		939
663	if (c)	940	if (r)
		941	{
		942	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		943	c->conf->nodename, r->conf->nodename);
664	c->send_connect_request (id);	944	r->send_connect_request (c->conf->id);
		945	}
665	else	946	else
666	// no router found, aggressively connect to all routers	947	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
667	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	948	c->conf->nodename);
668	if ((*i)->conf->routerprio)
669	(*i)->establish_connection ();
670	}	949	}
671		950
672	void	951	void
673	connection::dump_status ()	952	connection::dump_status ()
674	{	953	{
675	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	954	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
676	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	955	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
677	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	956	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
678	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	957	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
679	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	958	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
680	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
681	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
682	}	959	}
683		960
684	void	961	void
685	vpn::dump_status ()	962	vpn::dump_status ()
686	{	963	{
687	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	964	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
688		965
689	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	966	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
690	(*c)->dump_status ();	967	(*c)->dump_status ();
691		968
692	slog (L_NOTICE, _("END status dump"));	969	slog (L_NOTICE, _("END status dump"));
693	}	970	}
694		971
695	vpn::vpn (void)	972	vpn::vpn (void)
		973	{
696	: event (this, &vpn::event_cb)	974	event .set<vpn, &vpn::event_cb > (this);
697	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	975	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
698	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	976	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
		977	#if 1//D2
		978	ipv42_ev_watcher .set<vpn, &vpn::ipv42_ev > (this);
		979	#endif
699	#if ENABLE_TCP	980	#if ENABLE_TCP
700	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	981	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
701	#endif	982	#endif
702	#if ENABLE_ICMP	983	#if ENABLE_ICMP
703	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	984	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
704	#endif	985	#endif
705	, tap_ev_watcher (this, &vpn::tap_ev)	986	#if ENABLE_DNS
706	{	987	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		988	#endif
		989	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
707	}	990	}
708		991
709	vpn::~vpn ()	992	vpn::~vpn ()
710	{	993	{
711	}	994	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.11 by pcg, Sun Apr 13 00:35:46 2003 UTC vs. Revision 1.62 by root, Sat Dec 17 22:05:34 2011 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.11 by pcg, Sun Apr 13 00:35:46 2003 UTC vs.
Revision 1.62 by root, Sat Dec 17 22:05:34 2011 UTC