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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.4 by pcg, Fri Apr 4 05:26:45 2003 UTC vs.
Revision 1.70 by root, Thu Oct 6 03:03:09 2022 UTC

…		…
1	/*	1	/*
2	vpn.C -- handle the protocol, encryption, handshaking etc.	2	vpn.C -- handle the protocol, encryption, handshaking etc.
		3	Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de>
3		4
		5	This file is part of GVPE.
		6
4	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
5	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
6	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
7	(at your option) any later version.	10	option) any later version.
8		11
9	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
10	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
12	GNU General Public License for more details.	15	Public License for more details.
13		16
14	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
15	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
16	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
17	*/	30	*/
18		31
19	#include "config.h"	32	#include "config.h"
20		33
21	#include <list>	34	#include <list>
22		35
		36	#include <cstdio>
		37	#include <cstring>
23	#include <cstdlib>	38	#include <cstdlib>
24	#include <cstring>
25	#include <cstdio>
26		39
27	#include <sys/types.h>	40	#include <sys/types.h>
28	#include <sys/socket.h>	41	#include <sys/socket.h>
29	#include <sys/poll.h>
30	#include <sys/wait.h>	42	#include <sys/wait.h>
31	#include <netinet/in.h>	43	#include <sys/stat.h>
32	#include <arpa/inet.h>
33	#include <errno.h>	44	#include <errno.h>
34	#include <time.h>	45	#include <time.h>
35	#include <unistd.h>	46	#include <unistd.h>
		47	#include <fcntl.h>
		48	#include <sys/socket.h>
		49
		50	#include "netcompat.h"
36		51
37	#include "pidfile.h"	52	#include "pidfile.h"
38		53
39	#include "connection.h"	54	#include "connection.h"
40	#include "util.h"	55	#include "util.h"
41	#include "vpn.h"	56	#include "vpn.h"
42		57
43	#if ENABLE_TCP	58	using namespace std;
44	# include <map>	59
45	# include <unistd.h>	60	vpn network; // THE vpn (bad design...)
46	# include <fcntl.h>
47	# include <sys/poll.h>
48	#endif
49		61
50	/////////////////////////////////////////////////////////////////////////////	62	/////////////////////////////////////////////////////////////////////////////
51		63
52	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 ()
53	{	104	{
54	// the tunnel device mtu should be the physical mtu - overhead	105	// the tunnel device mtu should be the physical mtu - overhead
55	// the tricky part is rounding to the cipher key blocksize	106	// the tricky part is rounding to the cipher key blocksize
56	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	107	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
57	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	108	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
58	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	109	mtu -= mtu % BLOCK_SIZE (CIPHER); // round
59	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	110	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
60		111
61	char *env;	112	char *env;
62	asprintf (&env, "CONFBASE=%s", confbase);	113	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 ());	114	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
69	putenv (env);	115	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		116	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
70	asprintf (&env, "MTU=%d", mtu);	117	asprintf (&env, "MTU=%d", mtu); putenv (env);
71	putenv (env);	118	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
72	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	119	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
73	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
74	THISNODE->id & 0xff);
75	putenv (env);
76		120
77	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;
78	}	168	}
79		169
80	int	170	int
81	vpn::setup ()	171	vpn::setup ()
82	{	172	{
		173	int success = 0;
		174
		175	ipv4_tos = -1;
83	udpv4_fd = -1;	176	ipv4_fd = -1;
84		177
85	if (THISNODE->protocols & PROT_UDPv4)	178	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
86	{	179	{
87	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	180	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
88		181
89	if (udpv4_fd < 0)	182	if (ipv4_fd < 0)
90	return -1;	183	return -1;
91		184
92	// standard daemon practise...	185	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
93	{
94	int oval = 1;
95	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
96	}
97
98	sockinfo si (THISNODE, PROT_UDPv4);
99
100	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
101	{
102	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
103	exit (1);
104	}
105
106	#ifdef IP_MTU_DISCOVER
107	// this I really consider a linux bug. I am neither connected	186	// this I really consider a linux bug. I am neither connected
108	// 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
109	// fragment for me sometimes.	188	// fragment for me sometimes.
110	{	189	{
111	int oval = IP_PMTUDISC_DONT;	190	int oval = IP_PMTUDISC_DONT;
112	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	191	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		192	}
		193	#endif
		194
		195	sockinfo si (THISNODE, PROT_IPv4);
		196
		197	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
		198	{
		199	slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
		200	return -1;
113	}	201	}
114	#endif
115		202
116	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	203	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
		204	++success;
117	}	205	}
		206	else
		207	THISNODE->protocols &= ~PROT_IPv4;
118		208
		209	udpv4_tos = -1;
119	ipv4_fd = -1;	210	udpv4_fd = -1;
120	if (THISNODE->protocols & PROT_IPv4)
121	{
122	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
123		211
		212	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
		213	{
		214	udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		215
124	if (ipv4_fd < 0)	216	if (udpv4_fd < 0)
125	return -1;	217	return -1;
126		218
127	sockinfo si (THISNODE, PROT_IPv4);	219	// standard daemon practise...
128
129	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
130	{	220	{
131	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	221	int oval = 1;
132	exit (1);	222	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
133	}	223	}
134		224
135	#ifdef IP_MTU_DISCOVER	225	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
136	// this I really consider a linux bug. I am neither connected	226	// this I really consider a linux bug. I am neither connected
137	// nor do I fragment myself. Linux still sets DF and doesn't	227	// nor do I fragment myself. Linux still sets DF and doesn't
138	// fragment for me sometimes.	228	// fragment for me sometimes.
139	{	229	{
140	int oval = IP_PMTUDISC_DONT;	230	int oval = IP_PMTUDISC_DONT;
		231	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		232	}
		233	#endif
		234
		235	sockinfo si (THISNODE, PROT_UDPv4);
		236
		237	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
		238	{
		239	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		240	return -1;
		241	}
		242
		243	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		244	++success;
		245	}
		246	else
		247	THISNODE->protocols &= ~PROT_UDPv4;
		248
		249	icmpv4_tos = -1;
		250	icmpv4_fd = -1;
		251
		252	#if ENABLE_ICMP
		253	if (THISNODE->protocols & PROT_ICMPv4)
		254	{
		255	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
		256
		257	if (icmpv4_fd < 0)
		258	return -1;
		259
		260	#ifdef ICMP_FILTER
		261	{
		262	icmp_filter oval;
		263	oval.data = 0;
		264	if (::conf.icmp_type < 32)
		265	oval.data \|= 1 << ::conf.icmp_type;
		266	oval.data = ~oval.data;
		267
		268	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
		269	}
		270	#endif
		271
		272	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		273	// this I really consider a linux bug. I am neither connected
		274	// nor do I fragment myself. Linux still sets DF and doesn't
		275	// fragment for me sometimes.
		276	{
		277	int oval = IP_PMTUDISC_DONT;
141	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	278	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		279	}
		280	#endif
		281
		282	sockinfo si (THISNODE, PROT_ICMPv4);
		283
		284	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
		285	{
		286	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		287	return -1;
142	}	288	}
143	#endif
144		289
145	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	290	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		291	++success;
146	}	292	}
		293	#endif
		294
		295	tcpv4_fd = -1;
147		296
148	#if ENABLE_TCP	297	#if ENABLE_TCP
149	if (THISNODE->protocols & PROT_TCPv4)	298	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
150	{	299	{
151	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	300	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
152		301
153	if (tcpv4_fd < 0)	302	if (tcpv4_fd < 0)
154	return -1;	303	return -1;
155		304
156	// standard daemon practise...	305	// standard daemon practise...
161		310
162	sockinfo si (THISNODE, PROT_TCPv4);	311	sockinfo si (THISNODE, PROT_TCPv4);
163		312
164	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	313	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
165	{	314	{
166	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	315	slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
167	exit (1);	316	return -1;
168	}	317	}
169		318
170	if (listen (tcpv4_fd, 5))	319	if (listen (tcpv4_fd, 5))
171	{	320	{
172	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	321	slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
173	exit (1);	322	return -1;
		323	}
		324
		325	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		326	++success;
		327	}
		328	else
		329	THISNODE->protocols &= ~PROT_TCPv4;
		330	#endif
		331
		332	dnsv4_tos = -1;
		333	dnsv4_fd = -1;
		334
		335	#if ENABLE_DNS
		336	if (THISNODE->protocols & PROT_DNSv4)
		337	{
		338	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		339
		340	dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		341
		342	if (dnsv4_fd < 0)
		343	return -1;
		344
		345	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		346	// this I really consider a linux bug. I am neither connected
		347	// nor do I fragment myself. Linux still sets DF and doesn't
		348	// fragment for me sometimes.
		349	{
		350	int oval = IP_PMTUDISC_DONT;
		351	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
174	}	352	}
175
176	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
177	}
178	#endif	353	# endif
		354
		355	// standard daemon practise...
		356	{
		357	int oval = 1;
		358	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		359	}
		360
		361	sockinfo si (THISNODE->dns_hostname,
		362	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		363	PROT_DNSv4);
		364
		365	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		366	{
		367	slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		368	return -1;
		369	}
		370
		371	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		372	++success;
		373	}
		374	#endif
		375
		376	/////////////////////////////////////////////////////////////////////////////
		377
		378	if (!success)
		379	{
		380	slog (L_ERR, _("no protocols enabled."));
		381	return -1;
		382	}
		383
		384	reconnect_all ();
		385
		386	/////////////////////////////////////////////////////////////////////////////
179		387
180	tap = new tap_device ();	388	tap = new tap_device ();
181	if (!tap) //D this, of course, never catches	389	if (!tap) //D this, of course, never catches
182	{	390	{
183	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	391	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
184	exit (1);	392	return -1;
185	}	393	}
186		394
187	run_script (run_script_cb (this, &vpn::script_if_up), true);	395	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
188		396
		397	run_script_cb cb;
		398	cb.set<vpn, &vpn::script_if_init> (this);
		399
		400	if (tap->if_up () &&
		401	!run_script (cb, true))
		402	{
		403	slog (L_ERR, _("interface initialization command '%s' failed."),
		404	tap->if_up ());
		405	return -1;
		406	}
		407
		408	cb.set<vpn, &vpn::script_if_up> (this);
		409	if (!run_script (cb, true))
		410	{
		411	slog (L_ERR, _("if-up command execution failed."));
		412	return -1;
		413	}
		414
189	tap_ev_watcher.start (tap->fd, POLLIN);	415	tap_ev_watcher.start (tap->fd, EV_READ);
190
191	reconnect_all ();
192		416
193	return 0;	417	return 0;
194	}	418	}
195		419
		420	bool
		421	vpn::drop_privileges ()
		422	{
		423	if (::conf.change_root)
		424	{
		425	if (!strcmp (::conf.change_root, "/"))
		426	{
		427	char dir [L_tmpnam];
		428	if (!tmpnam (dir))
		429	{
		430	slog (L_CRIT, _("unable to create anonymous root path."));
		431	return false;
		432	}
		433
		434	if (mkdir (dir, 0700))
		435	{
		436	slog (L_CRIT, _("unable to create anonymous root directory."));
		437	return false;
		438	}
		439
		440	if (chdir (dir))
		441	{
		442	slog (L_CRIT, _("unable to change to anonymous root directory."));
		443	return false;
		444	}
		445
		446	if (rmdir (dir))
		447	slog (L_ERR, _("unable to remove anonymous root directory, continuing."));
		448	}
		449	else
		450	{
		451	if (chdir (::conf.change_root))
		452	{
		453	slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root);
		454	return false;
		455	}
		456	}
		457
		458	if (chroot ("."))
		459	{
		460	slog (L_CRIT, _("unable to set new root directory."));
		461	return false;
		462	}
		463
		464	if (chdir ("/"))
		465	{
		466	slog (L_CRIT, _("unable to set cwd to new root directory."));
		467	return false;
		468	}
		469	}
		470
		471	if (::conf.change_gid)
		472	if (setgid (::conf.change_gid))
		473	{
		474	slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid);
		475	return false;
		476	}
		477
		478	if (::conf.change_uid)
		479	if (setuid (::conf.change_uid))
		480	{
		481	slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid);
		482	return false;
		483	}
		484
		485	return true;
		486	}
		487
		488	bool
		489	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		490	{
		491	set_tos (ipv4_fd, ipv4_tos, tos);
		492	xsendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		493
		494	return true;
		495	}
		496
		497	static u16
		498	ipv4_checksum (u16 *data, unsigned int len)
		499	{
		500	// use 32 bit accumulator and fold back carry bits at the end
		501	u32 sum = 0;
		502
		503	while (len > 1)
		504	{
		505	sum += *data++;
		506	len -= 2;
		507	}
		508
		509	// odd byte left?
		510	if (len)
		511	sum += (u8 )data;
		512
		513	// add back carry bits
		514	sum = (sum >> 16) + (sum & 0xffff); // lo += hi
		515	sum += (sum >> 16); // carry
		516
		517	return ~sum;
		518	}
		519
		520	#if ENABLE_ICMP
		521	bool
		522	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		523	{
		524	pkt->unshift_hdr (4);
		525
		526	icmp_header hdr = (icmp_header )&((*pkt)[0]);
		527	hdr->type = ::conf.icmp_type;
		528	hdr->code = 255;
		529	hdr->checksum = 0;
		530	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
		531
		532	set_tos (icmpv4_fd, icmpv4_tos, tos);
		533	xsendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		534
		535	return true;
		536	}
		537	#endif
		538
		539	bool
		540	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		541	{
		542	set_tos (udpv4_fd, udpv4_tos, tos);
		543	xsendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		544
		545	return true;
		546	}
		547
196	void	548	void
197	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	549	vpn::inject_data_packet (tap_packet *pkt, int dst)
198	{	550	{
199	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	551	if (dst)
200	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	552	{
201	}	553	// unicast
202		554	if (dst != THISNODE->id)
203	void	555	conns[dst - 1]->inject_data_packet (pkt);
204	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	556	}
205	{	557	else
206	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	558	{
207	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	559	// broadcast, this is ugly, but due to the security policy
		560	// we have to connect to all hosts...
		561	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		562	if ((*c)->conf != THISNODE)
		563	(*c)->inject_data_packet (pkt);
		564	}
208	}	565	}
209		566
210	void	567	void
211	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	568	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
212	{	569	{
213	unsigned int src = pkt->src ();	570	unsigned int src = pkt->src ();
214	unsigned int dst = pkt->dst ();	571	unsigned int dst = pkt->dst ();
215		572
216	slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"),	573	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);	574	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
218		575
219	if (src == 0 \|\| src > conns.size ()	576	if (src == 0 \|\| src > conns.size ()
220	\|\| dst > conns.size ()	577	\|\| dst > conns.size ()
221	\|\| pkt->typ () >= vpn_packet::PT_MAX)	578	\|\| pkt->typ () >= vpn_packet::PT_MAX)
222	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	579	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."),
223	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	580	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
224	else	581	else
225	{	582	{
226	connection *c = conns[src - 1];	583	connection *c = conns[src - 1];
227		584
228	if (dst == 0 && !THISNODE->routerprio)	585	if (dst == 0)
229	slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),	586	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
230	c->conf->nodename, (const char *)rsi);	587	c->conf->nodename, (const char *)rsi);
231	else if (dst != 0 && dst != THISNODE->id)	588	else if (dst != THISNODE->id)
232	// FORWARDING NEEDED ;)	589	{
		590	if (THISNODE->routerprio)
		591	// the tos setting gets lost here. who cares.
		592	conns[dst - 1]->inject_vpn_packet (pkt);
		593	else
233	slog (L_WARN,	594	slog (L_WARN,
234	_("received frame for node %d ('%s') from %s, but this is node %d ('%s')"),	595	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
		596	c->conf->nodename, (const char *)rsi,
235	dst, conns[dst - 1]->conf->nodename,	597	conns[dst - 1]->conf->nodename);
236	(const char *)rsi,	598	}
237	THISNODE->id, THISNODE->nodename);
238	else	599	else
239	c->recv_vpn_packet (pkt, rsi);	600	c->recv_vpn_packet (pkt, rsi);
240	}	601	}
241	}	602	}
242		603
243	void	604	bool
244	vpn::udpv4_ev (io_watcher &w, short revents)	605	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
245	{	606	{
246	if (revents & (POLLIN \| POLLERR))	607	switch (si.prot)
		608	{
		609	case PROT_IPv4:
		610	return send_ipv4_packet (pkt, si, tos);
		611
		612	case PROT_UDPv4:
		613	return send_udpv4_packet (pkt, si, tos);
		614
		615	#if ENABLE_TCP
		616	case PROT_TCPv4:
		617	return send_tcpv4_packet (pkt, si, tos);
		618	#endif
		619	#if ENABLE_ICMP
		620	case PROT_ICMPv4:
		621	return send_icmpv4_packet (pkt, si, tos);
		622	#endif
		623	#if ENABLE_DNS
		624	case PROT_DNSv4:
		625	return send_dnsv4_packet (pkt, si, tos);
		626	#endif
		627	default:
		628	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si);
		629	}
		630
		631	return false;
		632	}
		633
		634	inline void
		635	vpn::ipv4_ev (ev::io &w, int revents)
		636	{
		637	if (revents & EV_READ)
247	{	638	{
248	vpn_packet *pkt = new vpn_packet;	639	vpn_packet *pkt = new vpn_packet;
249	struct sockaddr_in sa;	640	struct sockaddr_in sa;
250	socklen_t sa_len = sizeof (sa);	641	socklen_t sa_len = sizeof (sa);
251	int len;	642	int len;
252		643
253	len = recvfrom (w.p->fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	644	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
254		645
255	sockinfo si(sa);	646	sockinfo si(sa, PROT_IPv4);
256		647
257	if (len > 0)	648	if (len > 0)
258	{	649	{
259	pkt->len = len;	650	pkt->len = len;
260		651
		652	// raw sockets deliver the ipv4 header, but don't expect it on sends
		653	pkt->skip_hdr (pkt->ipv4_hdr_len ());
		654
261	recv_vpn_packet (pkt, si);	655	recv_vpn_packet (pkt, si);
262	}	656	}
263	else	657	else
264	{	658	{
265	// probably ECONNRESET or somesuch	659	// probably ECONNRESET or somesuch
266	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	660	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
267	}	661	}
268		662
269	delete pkt;	663	delete pkt;
270	}	664	}
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	665	else
278	{	666	{
279	slog (L_ERR,	667	slog (L_ERR,
280	_("FATAL: unknown revents %08x in socket, terminating\n"),	668	_("FATAL: unknown revents %08x in socket, exiting.\n"),
281	revents);	669	revents);
282	exit (1);	670	exit (EXIT_FAILURE);
283	}	671	}
284	}	672	}
285		673
286	void	674	#if ENABLE_ICMP
		675	inline void
287	vpn::ipv4_ev (io_watcher &w, short revents)	676	vpn::icmpv4_ev (ev::io &w, int revents)
288	{	677	{
289	if (revents & (POLLIN \| POLLERR))	678	if (revents & EV_READ)
290	{	679	{
291	vpn_packet *pkt = new vpn_packet;	680	vpn_packet *pkt = new vpn_packet;
292	struct sockaddr_in sa;	681	struct sockaddr_in sa;
293	socklen_t sa_len = sizeof (sa);	682	socklen_t sa_len = sizeof (sa);
294	int len;	683	int len;
295		684
296	len = recvfrom (w.p->fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	685	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
297		686
298	sockinfo si(sa, PROT_IPv4);	687	sockinfo si(sa, PROT_ICMPv4);
299		688
300	if (len > 0)	689	if (len > 0)
301	{	690	{
302	pkt->len = len;	691	pkt->len = len;
303		692
		693	icmp_header hdr = (icmp_header )&((*pkt)[IP_OVERHEAD]);
		694
		695	if (hdr->type == ::conf.icmp_type
		696	&& hdr->code == 255)
		697	{
304	// raw sockets deliver the ipv4, but don't expect it on sends	698	// raw sockets deliver the ipv4, but don't expect it on sends
305	// this is slow, but...	699	// this is slow, but...
306	pkt->skip_hdr (IP_OVERHEAD);	700	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
307		701
308	recv_vpn_packet (pkt, si);	702	recv_vpn_packet (pkt, si);
		703	}
309	}	704	}
310	else	705	else
311	{	706	{
312	// probably ECONNRESET or somesuch	707	// probably ECONNRESET or somesuch
313	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	708	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
314	}	709	}
315		710
316	delete pkt;	711	delete pkt;
317	}	712	}
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	713	else
325	{	714	{
326	slog (L_ERR,	715	slog (L_ERR,
327	_("FATAL: unknown revents %08x in socket, terminating\n"),	716	_("FATAL: unknown revents %08x in socket, exiting.\n"),
328	revents);	717	revents);
329	exit (1);	718	exit (EXIT_FAILURE);
330	}
331	}
332
333	#if ENABLE_TCP
334
335	struct tcp_connection;
336
337	struct lt_sockinfo
338	{
339	bool operator()(const sockinfo a, const sockinfo b) const
340	{
341	return a < b;
342	}
343	};
344
345	struct tcp_si_map : public map<const sockinfo , tcp_connection , lt_sockinfo> {
346	void cleaner_cb (time_watcher &w); time_watcher cleaner;
347
348	tcp_si_map ()
349	: cleaner(this, &tcp_si_map::cleaner_cb)
350	{
351	cleaner.start (0);
352	}
353	} tcp_si;
354
355	struct tcp_connection : io_watcher {
356	tstamp last_activity;
357	const sockinfo si;
358	vpn &v;
359	bool ok;
360
361	vpn_packet *r_pkt;
362	u32 r_len, r_ofs;
363
364	void tcpv4_ev (io_watcher &w, short revents);
365
366	operator tcp_si_map::value_type()
367	{
368	return tcp_si_map::value_type (&si, this);
369	}
370
371	tcp_connection (int fd, const sockinfo &si_, vpn &v_)
372	: v(v_), si(si_), io_watcher(this, &tcp_connection::tcpv4_ev)
373	{
374	last_activity = NOW;
375	ok = false;
376	r_pkt = 0;
377	start (fd, POLLOUT);
378	}
379
380	~tcp_connection () { if (p) close (p->fd); }
381	};
382
383	void tcp_si_map::cleaner_cb (time_watcher &w)
384	{
385	w.at = NOW + 600;
386	tstamp to = NOW - ::conf.keepalive - 30;
387
388	for (iterator i = begin (); i != end(); )
389	if (i->second->last_activity >= to)
390	++i;
391	else
392	{
393	erase (i);
394	i = begin ();
395	}	719	}
396	}	720	}
		721	#endif
397		722
398	void	723	inline void
399	vpn::send_tcpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	724	vpn::udpv4_ev (ev::io &w, int revents)
400	{	725	{
401	tcp_si_map::iterator info = tcp_si.find (&si);	726	if (revents & EV_READ)
402
403	if (info == tcp_si.end ())
404	{
405	// woaw, the first lost packet ;)
406	int fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
407
408	if (fd >= 0)
409	{
410	fcntl (fd, F_SETFL, O_NONBLOCK);
411
412	if (connect (fd, si.sav4 (), si.salenv4 ()) >= 0
413	\|\| errno == EINPROGRESS)
414	{
415	tcp_connection i = new tcp_connection (fd, si, this);
416
417	tcp_si.insert (*i);
418	}
419	else
420	close (fd);
421	}
422	}	727	{
423	else
424	{
425	tcp_connection *i = info->second;
426
427	i->last_activity = NOW;
428
429	if (i->ok)
430	{
431	setsockopt (i->p->fd, SOL_IP, IP_TOS, &tos, sizeof tos);
432
433	// we use none of the advantages of tcp
434	write (i->p->fd, (void *)pkt, pkt->len + sizeof (u32)) != pkt->len + sizeof (u32);
435	}
436	}
437
438	#if 0
439	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
440	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
441	#endif
442	}
443
444	void
445	tcp_connection::tcpv4_ev (io_watcher &w, short revents)
446	{
447	last_activity = NOW;
448
449	if (!ok) // just established?
450	{
451	ok = true;
452	set (POLLIN);
453	}
454
455	if (revents & (POLLIN \| POLLERR))
456	{
457	u32 len;
458
459	if (sizeof (len) == read (p->fd, &len, sizeof (len)))
460	{
461	vpn_packet *pkt = new vpn_packet;	728	vpn_packet *pkt = new vpn_packet;
462
463	if (len == read (p->fd, &((*pkt)[0]), len))
464	{
465	pkt->len = len;
466
467	v.recv_vpn_packet (pkt, si);
468	return;
469	}
470
471	delete pkt;
472	}
473
474	tcp_si.erase (&si);
475
476	set (0);//D
477	}
478	}
479
480	void
481	vpn::tcpv4_ev (io_watcher &w, short revents)
482	{
483	if (revents & (POLLIN \| POLLERR))
484	{
485	struct sockaddr_in sa;	729	struct sockaddr_in sa;
486	socklen_t sa_len = sizeof (sa);	730	socklen_t sa_len = sizeof (sa);
487	int len;	731	int len;
488		732
489	int fd = accept (w.p->fd, (sockaddr *)&sa, &sa_len);	733	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
490		734
491	if (fd >= 0)
492	{
493	fcntl (fd, F_SETFL, O_NONBLOCK);
494
495	sockinfo si(sa, PROT_TCPv4);	735	sockinfo si(sa, PROT_UDPv4);
496	tcp_connection i = new tcp_connection (fd, si, this);
497		736
498	slog (L_DEBUG, _("accepted tcp connection from %s\n"), (const char *)si);//D	737	if (len > 0)
499
500	tcp_si.insert (*i);
501	}	738	{
		739	pkt->len = len;
		740
		741	recv_vpn_packet (pkt, si);
		742	}
		743	else
		744	{
		745	// probably ECONNRESET or somesuch
		746	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
		747	}
		748
		749	delete pkt;
		750	}
		751	else
502	}	752	{
		753	slog (L_ERR,
		754	_("FATAL: unknown revents %08x in socket, exiting.\n"),
		755	revents);
		756	exit (EXIT_FAILURE);
		757	}
503	}	758	}
504		759
505	#endif	760	inline void
506
507	void
508	vpn::tap_ev (io_watcher &w, short revents)	761	vpn::tap_ev (ev::io &w, int revents)
509	{	762	{
510	if (revents & POLLIN)	763	if (revents & EV_READ)
511	{	764	{
512	/* process data */	765	/* process data */
513	tap_packet *pkt;	766	tap_packet *pkt;
514		767
515	pkt = tap->recv ();	768	pkt = tap->recv ();
516		769
		770	if (!pkt)
		771	return;
		772
		773	if (pkt->len > 14)
		774	{
517	int dst = mac2id (pkt->dst);	775	int dst = mac2id (pkt->dst);
518	int src = mac2id (pkt->src);	776	int src = mac2id (pkt->src);
519		777
520	if (src != THISNODE->id)	778	if (src != THISNODE->id)
521	{
522	slog (L_ERR, _("FATAL: tap packet not originating on current node received, terminating."));
523	exit (1);
524	}
525
526	if (dst == THISNODE->id)
527	{
528	slog (L_ERR, _("FATAL: tap packet destined for current node received, terminating."));
529	exit (1);
530	}
531
532	if (dst > conns.size ())
533	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
534	else
535	{
536	if (dst)
537	{	779	{
538	// unicast	780	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
539	if (dst != THISNODE->id)	781	exit (EXIT_FAILURE);
540	conns[dst - 1]->inject_data_packet (pkt);
541	}	782	}
		783
		784	if (dst == THISNODE->id)
		785	{
		786	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		787	exit (EXIT_FAILURE);
		788	}
		789
		790	if (dst > conns.size ())
		791	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
542	else	792	else
543	{
544	// broadcast, first check router, then self, then english
545	connection *router = find_router ();
546
547	if (router)
548	router->inject_data_packet (pkt, true);	793	inject_data_packet (pkt, dst);
549	else
550	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
551	if ((*c)->conf != THISNODE)
552	(*c)->inject_data_packet (pkt);
553	}
554	}	794	}
555		795
556	delete pkt;	796	delete pkt;
557	}
558	else if (revents & (POLLHUP \| POLLERR))
559	{
560	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
561	exit (1);
562	}	797	}
563	else	798	else
564	abort ();	799	abort ();
565	}	800	}
566		801
567	void	802	inline void
568	vpn::event_cb (time_watcher &w)	803	vpn::event_cb (ev::timer &w, int)
569	{	804	{
570	if (events)	805	if (events)
571	{	806	{
572	if (events & EVENT_SHUTDOWN)	807	if (events & EVENT_SHUTDOWN)
573	{	808	{
574	slog (L_INFO, _("preparing shutdown..."));	809	slog (L_INFO, _("preparing shutdown..."));
575		810
576	shutdown_all ();	811	shutdown_all ();
577
578	remove_pid (pidfilename);	812	remove_pid (conf.pidfilename);
579
580	slog (L_INFO, _("terminating"));	813	slog (L_INFO, _("exiting."));
581		814	exit (EXIT_SUCCESS);
582	exit (0);
583	}	815	}
584		816
585	if (events & EVENT_RECONNECT)	817	if (events & EVENT_RECONNECT)
586	{	818	{
587	slog (L_INFO, _("forced reconnect"));	819	slog (L_INFO, _("forced reconnect."));
588		820
589	reconnect_all ();	821	reconnect_all ();
590	}	822	}
591		823
592	events = 0;	824	events = 0;
593	}	825	}
594
595	w.at = TSTAMP_CANCEL;
596	}	826	}
597		827
598	void	828	void
599	vpn::shutdown_all ()	829	vpn::shutdown_all ()
600	{	830	{
…		…
610		840
611	conns.clear ();	841	conns.clear ();
612		842
613	connection_init ();	843	connection_init ();
614		844
615	for (configuration::node_vector::iterator i = conf.nodes.begin ();	845	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
616	i != conf.nodes.end (); ++i)	846	conns.push_back (new connection (this, *i));
617	{
618	connection *conn = new connection (this);
619		847
620	conn->conf = *i;	848	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
621	conns.push_back (conn);
622
623	conn->establish_connection ();	849	(*c)->establish_connection ();
624	}
625	}	850	}
626		851
627	connection *vpn::find_router ()	852	bool
		853	vpn::can_direct (conf_node src, conf_node dst) const
628	{	854	{
629	u32 prio = 0;	855	return src != dst
		856	&& src->may_direct (dst)
		857	&& dst->may_direct (src)
		858	&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS)
		859	\|\| (src->protocols & dst->connectable_protocols ()));
		860	}
		861
		862	// only works for indirect and routed connections: find a router
		863	// from THISNODE to dst
		864	connection *
		865	vpn::find_router_for (const connection *dst)
		866	{
630	connection *router = 0;	867	connection *router = 0;
631		868
		869	// first try to find a router with a direct connection, route there
		870	// regardless of any other considerations.
		871	{
		872	u32 prio = 1;
		873
		874	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		875	{
		876	connection c = i;
		877
		878	if (c->conf->routerprio > prio
		879	&& c->conf != THISNODE
		880	&& can_direct (c->conf, dst->conf)
		881	&& c->ictx && c->octx)
		882	{
		883	prio = c->conf->routerprio;
		884	router = c;
		885	}
		886	}
		887	}
		888
		889	if (router)
		890	return router;
		891
		892	// second try find the router with the highest priority, higher than ours
		893	{
		894	u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1;
		895
		896	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
		897	{
		898	connection c = i;
		899
		900	if (c->conf->routerprio > prio
		901	&& c != dst
		902	&& c->conf != THISNODE
		903	&& c->ictx && c->octx)
		904	{
		905	prio = c->conf->routerprio;
		906	router = c;
		907	}
		908	}
		909	}
		910
		911	return router;
		912	}
		913
		914	void
		915	vpn::connection_established (connection *c)
		916	{
632	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	917	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
633	{	918	{
634	connection c = i;	919	connection o = i;
635		920
636	if (c->conf->routerprio > prio	921	if (o->si.valid ()
637	&& c->connectmode == conf_node::C_ALWAYS	922	&& c->si != o->si
638	&& c->conf != THISNODE	923	&& c == find_router_for (o)
639	&& c->ictx && c->octx)	924	&& !can_direct (THISNODE, o->conf))
640	{
641	prio = c->conf->routerprio;
642	router = c;
643	}	925	{
		926	slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."),
		927	o->conf->nodename, c->conf->nodename);
		928	o->rekey ();
		929	}
644	}	930	}
645
646	return router;
647	}	931	}
648		932
649	void vpn::connect_request (int id)	933	void
		934	vpn::send_connect_request (connection *c)
650	{	935	{
651	connection *c = find_router ();	936	connection *r = find_router_for (c);
652		937
653	if (c)	938	if (r)
		939	{
		940	slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."),
		941	c->conf->nodename, r->conf->nodename);
654	c->connect_request (id);	942	r->send_connect_request (c->conf->id);
655	//else // does not work, because all others must connect to the same router	943	}
656	// // no router found, aggressively connect to all routers	944	else
657	// for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	945	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
658	// if ((*i)->conf->routerprio)	946	c->conf->nodename);
659	// (*i)->establish_connection ();
660	}	947	}
661		948
662	void	949	void
663	connection::dump_status ()	950	connection::dump_status ()
664	{	951	{
665	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	952	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
666	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	953	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
667	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	954	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
668	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	955	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
669	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	956	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
670	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
671	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
672	}	957	}
673		958
674	void	959	void
675	vpn::dump_status ()	960	vpn::dump_status ()
676	{	961	{
677	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	962	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
678		963
679	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	964	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
680	(*c)->dump_status ();	965	(*c)->dump_status ();
681		966
682	slog (L_NOTICE, _("END status dump"));	967	slog (L_NOTICE, _("END status dump"));
683	}	968	}
684		969
685	vpn::vpn (void)	970	vpn::vpn (void)
686	: event(this, &vpn::event_cb)	971	{
		972	event .set<vpn, &vpn::event_cb > (this);
687	, udpv4_ev_watcher(this, &vpn::udpv4_ev)	973	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
688	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	974	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
689	, tap_ev_watcher (this, &vpn::tap_ev)
690	#if ENABLE_TCP	975	#if ENABLE_TCP
691	, tcpv4_ev_watcher(this, &vpn::tcpv4_ev)	976	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
692	#endif	977	#endif
693	{	978	#if ENABLE_ICMP
		979	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
		980	#endif
		981	#if ENABLE_DNS
		982	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		983	#endif
		984	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
694	}	985	}
695		986
696	vpn::~vpn ()	987	vpn::~vpn ()
697	{	988	{
698	}	989	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.4 by pcg, Fri Apr 4 05:26:45 2003 UTC vs. Revision 1.70 by root, Thu Oct 6 03:03:09 2022 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.4 by pcg, Fri Apr 4 05:26:45 2003 UTC vs.
Revision 1.70 by root, Thu Oct 6 03:03:09 2022 UTC