[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 1.62 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 <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	#if 1//D2
		153	ipv42_tos = -1;
83	udpv4_fd = -1;	154	ipv42_fd = -1;
84		155
85	if (THISNODE->protocols & PROT_UDPv4)	156	if (THISNODE->protocols & PROT_IPv42 && ::conf.ip_proto)
86	{	157	{
87	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	158	ipv42_fd = setup_socket (PROT_IPv42, PF_INET, SOCK_RAW, ::conf.ip2_proto);
88		159
89	if (udpv4_fd < 0)	160	if (ipv42_fd < 0)
90	return -1;	161	return -1;
91		162
92	// standard daemon practise...	163	#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	164	// this I really consider a linux bug. I am neither connected
108	// 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
109	// fragment for me sometimes.	166	// fragment for me sometimes.
110	{	167	{
111	int oval = IP_PMTUDISC_DONT;	168	int oval = IP_PMTUDISC_DONT;
112	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	169	setsockopt (ipv42_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		170	}
		171	#endif
		172
		173	sockinfo si (THISNODE, PROT_IPv42);
		174
		175	if (bind (ipv42_fd, si.sav4 (), si.salenv4 ()))
		176	{
		177	slog (L_ERR, _("can't bind ipv42 socket on %s: %s, exiting."), (const char *)si, strerror (errno));
		178	return -1;
113	}	179	}
114	#endif
115		180
116	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	181	ipv42_ev_watcher.start (ipv42_fd, EV_READ);
		182	++success;
117	}	183	}
		184	else
		185	THISNODE->protocols &= ~PROT_IPv42;
		186	#endif
118		187
		188	ipv4_tos = -1;
119	ipv4_fd = -1;	189	ipv4_fd = -1;
		190
120	if (THISNODE->protocols & PROT_IPv4)	191	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
121	{	192	{
122	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	193	ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto);
123		194
124	if (ipv4_fd < 0)	195	if (ipv4_fd < 0)
125	return -1;	196	return -1;
126		197
127	sockinfo si (THISNODE, PROT_IPv4);	198	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
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	199	// this I really consider a linux bug. I am neither connected
137	// 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
138	// fragment for me sometimes.	201	// fragment for me sometimes.
139	{	202	{
140	int oval = IP_PMTUDISC_DONT;	203	int oval = IP_PMTUDISC_DONT;
141	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	204	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
142	}	205	}
143	#endif	206	#endif
144		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
145	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	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);
146	}	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;
		244	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		245	}
		246	#endif
		247
		248	sockinfo si (THISNODE, PROT_UDPv4);
		249
		250	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
		251	{
		252	slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		253	return -1;
		254	}
		255
		256	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
		257	++success;
		258	}
		259	else
		260	THISNODE->protocols &= ~PROT_UDPv4;
		261
		262	icmpv4_tos = -1;
		263	icmpv4_fd = -1;
		264
		265	#if ENABLE_ICMP
		266	if (THISNODE->protocols & PROT_ICMPv4)
		267	{
		268	icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP);
		269
		270	if (icmpv4_fd < 0)
		271	return -1;
		272
		273	#ifdef ICMP_FILTER
		274	{
		275	icmp_filter oval;
		276	oval.data = 0xffffffff;
		277	if (::conf.icmp_type < 32)
		278	oval.data &= ~(1 << ::conf.icmp_type);
		279
		280	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
		281	}
		282	#endif
		283
		284	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		285	// this I really consider a linux bug. I am neither connected
		286	// nor do I fragment myself. Linux still sets DF and doesn't
		287	// fragment for me sometimes.
		288	{
		289	int oval = IP_PMTUDISC_DONT;
		290	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		291	}
		292	#endif
		293
		294	sockinfo si (THISNODE, PROT_ICMPv4);
		295
		296	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
		297	{
		298	slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno));
		299	return -1;
		300	}
		301
		302	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
		303	++success;
		304	}
		305	#endif
		306
		307	tcpv4_fd = -1;
147		308
148	#if ENABLE_TCP	309	#if ENABLE_TCP
149	if (THISNODE->protocols & PROT_TCPv4)	310	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
150	{	311	{
151	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	312	tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP);
152		313
153	if (tcpv4_fd < 0)	314	if (tcpv4_fd < 0)
154	return -1;	315	return -1;
155		316
156	// standard daemon practise...	317	// standard daemon practise...
161		322
162	sockinfo si (THISNODE, PROT_TCPv4);	323	sockinfo si (THISNODE, PROT_TCPv4);
163		324
164	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	325	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
165	{	326	{
166	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));
167	exit (1);	328	return -1;
168	}	329	}
169		330
170	if (listen (tcpv4_fd, 5))	331	if (listen (tcpv4_fd, 5))
171	{	332	{
172	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));
173	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);
174	}	364	}
175
176	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
177	}
178	#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	/////////////////////////////////////////////////////////////////////////////
179		399
180	tap = new tap_device ();	400	tap = new tap_device ();
181	if (!tap) //D this, of course, never catches	401	if (!tap) //D this, of course, never catches
182	{	402	{
183	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	403	slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname);
184	exit (1);	404	return -1;
185	}	405	}
186		406
187	run_script (run_script_cb (this, &vpn::script_if_up), true);	407	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
188		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
189	tap_ev_watcher.start (tap->fd, POLLIN);	427	tap_ev_watcher.start (tap->fd, EV_READ);
190
191	reconnect_all ();
192		428
193	return 0;	429	return 0;
194	}	430	}
195		431
		432	bool
		433	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		434	{
		435	set_tos (ipv4_fd, ipv4_tos, tos);
		436	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		437
		438	return true;
		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
		451
		452	static u16
		453	ipv4_checksum (u16 *data, unsigned int len)
		454	{
		455	// use 32 bit accumulator and fold back carry bits at the end
		456	u32 sum = 0;
		457
		458	while (len > 1)
		459	{
		460	sum += *data++;
		461	len -= 2;
		462	}
		463
		464	// odd byte left?
		465	if (len)
		466	sum += (u8 )data;
		467
		468	// add back carry bits
		469	sum = (sum >> 16) + (sum & 0xffff); // lo += hi
		470	sum += (sum >> 16); // carry
		471
		472	return ~sum;
		473	}
		474
		475	#if ENABLE_ICMP
		476	bool
		477	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		478	{
		479	pkt->unshift_hdr (4);
		480
		481	icmp_header hdr = (icmp_header )&((*pkt)[0]);
		482	hdr->type = ::conf.icmp_type;
		483	hdr->code = 255;
		484	hdr->checksum = 0;
		485	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
		486
		487	set_tos (icmpv4_fd, icmpv4_tos, tos);
		488	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		489
		490	return true;
		491	}
		492	#endif
		493
		494	bool
		495	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		496	{
		497	set_tos (udpv4_fd, udpv4_tos, tos);
		498	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		499
		500	return true;
		501	}
		502
196	void	503	void
197	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	504	vpn::inject_data_packet (tap_packet *pkt, int dst)
198	{	505	{
199	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	506	if (dst)
200	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	507	{
201	}	508	// unicast
202		509	if (dst != THISNODE->id)
203	void	510	conns[dst - 1]->inject_data_packet (pkt);
204	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	511	}
205	{	512	else
206	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	513	{
207	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	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	}
208	}	520	}
209		521
210	void	522	void
211	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	523	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
212	{	524	{
213	unsigned int src = pkt->src ();	525	unsigned int src = pkt->src ();
214	unsigned int dst = pkt->dst ();	526	unsigned int dst = pkt->dst ();
215		527
216	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."),
217	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);	529	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len);
218		530
219	if (src == 0 \|\| src > conns.size ()	531	if (src == 0 \|\| src > conns.size ()
220	\|\| dst > conns.size ()	532	\|\| dst > conns.size ()
221	\|\| pkt->typ () >= vpn_packet::PT_MAX)	533	\|\| pkt->typ () >= vpn_packet::PT_MAX)
222	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)."),
223	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	535	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
224	else	536	else
225	{	537	{
226	connection *c = conns[src - 1];	538	connection *c = conns[src - 1];
227		539
228	if (dst == 0 && !THISNODE->routerprio)	540	if (dst == 0)
229	slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),	541	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."),
230	c->conf->nodename, (const char *)rsi);	542	c->conf->nodename, (const char *)rsi);
231	else if (dst != 0 && dst != THISNODE->id)	543	else if (dst != THISNODE->id)
232	// FORWARDING NEEDED ;)	544	{
		545	if (THISNODE->routerprio)
		546	// the tos setting gets lost here. who cares.
		547	conns[dst - 1]->inject_vpn_packet (pkt);
		548	else
233	slog (L_WARN,	549	slog (L_WARN,
234	_("received frame for node %d ('%s') from %s, but this is node %d ('%s')"),	550	_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."),
		551	c->conf->nodename, (const char *)rsi,
235	dst, conns[dst - 1]->conf->nodename,	552	conns[dst - 1]->conf->nodename);
236	(const char *)rsi,	553	}
237	THISNODE->id, THISNODE->nodename);
238	else	554	else
239	c->recv_vpn_packet (pkt, rsi);	555	c->recv_vpn_packet (pkt, rsi);
240	}	556	}
241	}	557	}
242		558
243	void	559	bool
244	vpn::udpv4_ev (io_watcher &w, short revents)	560	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
245	{	561	{
246	if (revents & (POLLIN \| POLLERR))	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
		596	vpn::ipv42_ev (ev::io &w, int revents)
		597	{
		598	if (revents & EV_READ)
247	{	599	{
248	vpn_packet *pkt = new vpn_packet;	600	vpn_packet *pkt = new vpn_packet;
249	struct sockaddr_in sa;	601	struct sockaddr_in sa;
250	socklen_t sa_len = sizeof (sa);	602	socklen_t sa_len = sizeof (sa);
251	int len;	603	int len;
252		604
253	len = recvfrom (w.p->fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	605	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
254		606
255	sockinfo si(sa);	607	sockinfo si(sa, PROT_IPv42);
256		608
257	if (len > 0)	609	if (len > 0)
258	{	610	{
259	pkt->len = len;	611	pkt->len = len;
260		612
		613	// raw sockets deliver the ipv4 header, but don't expect it on sends
		614	pkt->skip_hdr (pkt->ipv4_hdr_len ());
		615
261	recv_vpn_packet (pkt, si);	616	recv_vpn_packet (pkt, si);
262	}	617	}
263	else	618	else
264	{	619	{
265	// probably ECONNRESET or somesuch	620	// probably ECONNRESET or somesuch
266	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	621	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
267	}	622	}
268		623
269	delete pkt;	624	delete pkt;
270	}	625	}
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	626	else
278	{	627	{
279	slog (L_ERR,	628	slog (L_ERR,
280	_("FATAL: unknown revents %08x in socket, terminating\n"),	629	_("FATAL: unknown revents %08x in socket, exiting.\n"),
281	revents);	630	revents);
282	exit (1);	631	exit (EXIT_FAILURE);
283	}	632	}
284	}	633	}
		634	#endif
285		635
286	void	636	inline void
287	vpn::ipv4_ev (io_watcher &w, short revents)	637	vpn::ipv4_ev (ev::io &w, int revents)
288	{	638	{
289	if (revents & (POLLIN \| POLLERR))	639	if (revents & EV_READ)
290	{	640	{
291	vpn_packet *pkt = new vpn_packet;	641	vpn_packet *pkt = new vpn_packet;
292	struct sockaddr_in sa;	642	struct sockaddr_in sa;
293	socklen_t sa_len = sizeof (sa);	643	socklen_t sa_len = sizeof (sa);
294	int len;	644	int len;
295		645
296	len = recvfrom (w.p->fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	646	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
297		647
298	sockinfo si(sa, PROT_IPv4);	648	sockinfo si(sa, PROT_IPv4);
299		649
300	if (len > 0)	650	if (len > 0)
301	{	651	{
302	pkt->len = len;	652	pkt->len = len;
303		653
304	// raw sockets deliver the ipv4, but don't expect it on sends	654	// raw sockets deliver the ipv4 header, but don't expect it on sends
305	// this is slow, but...	655	pkt->skip_hdr (pkt->ipv4_hdr_len ());
306	pkt->skip_hdr (IP_OVERHEAD);
307		656
308	recv_vpn_packet (pkt, si);	657	recv_vpn_packet (pkt, si);
309	}	658	}
310	else	659	else
311	{	660	{
312	// probably ECONNRESET or somesuch	661	// probably ECONNRESET or somesuch
313	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	662	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
314	}	663	}
315		664
316	delete pkt;	665	delete pkt;
317	}	666	}
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	667	else
325	{	668	{
326	slog (L_ERR,	669	slog (L_ERR,
327	_("FATAL: unknown revents %08x in socket, terminating\n"),	670	_("FATAL: unknown revents %08x in socket, exiting.\n"),
328	revents);	671	revents);
329	exit (1);	672	exit (EXIT_FAILURE);
330	}	673	}
331	}	674	}
332		675
333	#if ENABLE_TCP	676	#if ENABLE_ICMP
334		677	inline void
335	struct tcp_connection;	678	vpn::icmpv4_ev (ev::io &w, int revents)
336
337	struct lt_sockinfo
338	{	679	{
339	bool operator()(const sockinfo a, const sockinfo b) const	680	if (revents & EV_READ)
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	{	681	{
393	erase (i);
394	i = begin ();
395	}
396	}
397
398	void
399	vpn::send_tcpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
400	{
401	tcp_si_map::iterator info = tcp_si.find (&si);
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	}
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;	682	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;	683	struct sockaddr_in sa;
486	socklen_t sa_len = sizeof (sa);	684	socklen_t sa_len = sizeof (sa);
487	int len;	685	int len;
488		686
489	int fd = accept (w.p->fd, (sockaddr *)&sa, &sa_len);	687	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
490		688
491	if (fd >= 0)
492	{
493	fcntl (fd, F_SETFL, O_NONBLOCK);
494
495	sockinfo si(sa, PROT_TCPv4);	689	sockinfo si(sa, PROT_ICMPv4);
496	tcp_connection i = new tcp_connection (fd, si, this);
497		690
498	slog (L_DEBUG, _("accepted tcp connection from %s\n"), (const char *)si);//D	691	if (len > 0)
499
500	tcp_si.insert (*i);
501	}	692	{
		693	pkt->len = len;
		694
		695	icmp_header hdr = (icmp_header )&((*pkt)[IP_OVERHEAD]);
		696
		697	if (hdr->type == ::conf.icmp_type
		698	&& hdr->code == 255)
		699	{
		700	// raw sockets deliver the ipv4, but don't expect it on sends
		701	// this is slow, but...
		702	pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD));
		703
		704	recv_vpn_packet (pkt, si);
		705	}
		706	}
		707	else
		708	{
		709	// probably ECONNRESET or somesuch
		710	slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno));
		711	}
		712
		713	delete pkt;
		714	}
		715	else
502	}	716	{
		717	slog (L_ERR,
		718	_("FATAL: unknown revents %08x in socket, exiting.\n"),
		719	revents);
		720	exit (EXIT_FAILURE);
		721	}
503	}	722	}
504
505	#endif	723	#endif
506		724
507	void	725	inline void
		726	vpn::udpv4_ev (ev::io &w, int revents)
		727	{
		728	if (revents & EV_READ)
		729	{
		730	vpn_packet *pkt = new vpn_packet;
		731	struct sockaddr_in sa;
		732	socklen_t sa_len = sizeof (sa);
		733	int len;
		734
		735	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
		736
		737	sockinfo si(sa, PROT_UDPv4);
		738
		739	if (len > 0)
		740	{
		741	pkt->len = len;
		742
		743	recv_vpn_packet (pkt, si);
		744	}
		745	else
		746	{
		747	// probably ECONNRESET or somesuch
		748	slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno));
		749	}
		750
		751	delete pkt;
		752	}
		753	else
		754	{
		755	slog (L_ERR,
		756	_("FATAL: unknown revents %08x in socket, exiting.\n"),
		757	revents);
		758	exit (EXIT_FAILURE);
		759	}
		760	}
		761
		762	inline void
508	vpn::tap_ev (io_watcher &w, short revents)	763	vpn::tap_ev (ev::io &w, int revents)
509	{	764	{
510	if (revents & POLLIN)	765	if (revents & EV_READ)
511	{	766	{
512	/* process data */	767	/* process data */
513	tap_packet *pkt;	768	tap_packet *pkt;
514		769
515	pkt = tap->recv ();	770	pkt = tap->recv ();
516		771
		772	if (!pkt)
		773	return;
		774
		775	if (pkt->len > 14)
		776	{
517	int dst = mac2id (pkt->dst);	777	int dst = mac2id (pkt->dst);
518	int src = mac2id (pkt->src);	778	int src = mac2id (pkt->src);
519		779
520	if (src != THISNODE->id)	780	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	{	781	{
538	// unicast	782	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
539	if (dst != THISNODE->id)	783	exit (EXIT_FAILURE);
540	conns[dst - 1]->inject_data_packet (pkt);
541	}	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);
542	else	794	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);	795	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	}	796	}
555		797
556	delete pkt;	798	delete pkt;
557	}	799	}
558	else if (revents & (POLLHUP \| POLLERR))
559	{
560	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
561	exit (1);
562	}
563	else	800	else
564	abort ();	801	abort ();
565	}	802	}
566		803
567	void	804	inline void
568	vpn::event_cb (time_watcher &w)	805	vpn::event_cb (ev::timer &w, int)
569	{	806	{
570	if (events)	807	if (events)
571	{	808	{
572	if (events & EVENT_SHUTDOWN)	809	if (events & EVENT_SHUTDOWN)
573	{	810	{
574	slog (L_INFO, _("preparing shutdown..."));	811	slog (L_INFO, _("preparing shutdown..."));
575		812
576	shutdown_all ();	813	shutdown_all ();
577
578	remove_pid (pidfilename);	814	remove_pid (conf.pidfilename);
579
580	slog (L_INFO, _("terminating"));	815	slog (L_INFO, _("exiting."));
581		816	exit (EXIT_SUCCESS);
582	exit (0);
583	}	817	}
584		818
585	if (events & EVENT_RECONNECT)	819	if (events & EVENT_RECONNECT)
586	{	820	{
587	slog (L_INFO, _("forced reconnect"));	821	slog (L_INFO, _("forced reconnect."));
588		822
589	reconnect_all ();	823	reconnect_all ();
590	}	824	}
591		825
592	events = 0;	826	events = 0;
593	}	827	}
594
595	w.at = TSTAMP_CANCEL;
596	}	828	}
597		829
598	void	830	void
599	vpn::shutdown_all ()	831	vpn::shutdown_all ()
600	{	832	{
…		…
610		842
611	conns.clear ();	843	conns.clear ();
612		844
613	connection_init ();	845	connection_init ();
614		846
615	for (configuration::node_vector::iterator i = conf.nodes.begin ();	847	for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i)
616	i != conf.nodes.end (); ++i)	848	conns.push_back (new connection (this, *i));
617	{
618	connection *conn = new connection (this);
619		849
620	conn->conf = *i;	850	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
621	conns.push_back (conn);
622
623	conn->establish_connection ();	851	(*c)->establish_connection ();
624	}
625	}	852	}
626		853
627	connection *vpn::find_router ()	854	bool
		855	vpn::can_direct (conf_node src, conf_node dst) const
628	{	856	{
629	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	{
630	connection *router = 0;	869	connection *router = 0;
631		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	{
632	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	919	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
633	{	920	{
634	connection c = i;	921	connection o = i;
635		922
636	if (c->conf->routerprio > prio	923	if (!o->is_direct
637	&& c->connectmode == conf_node::C_ALWAYS	924	&& o->si.valid ()
638	&& c->conf != THISNODE	925	&& c->si != o->si
639	&& c->ictx && c->octx)	926	&& c == find_router_for (o))
640	{
641	prio = c->conf->routerprio;
642	router = c;
643	}	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	}
644	}	932	}
645
646	return router;
647	}	933	}
648		934
649	void vpn::connect_request (int id)	935	void
		936	vpn::send_connect_request (connection *c)
650	{	937	{
651	connection *c = find_router ();	938	connection *r = find_router_for (c);
652		939
653	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);
654	c->connect_request (id);	944	r->send_connect_request (c->conf->id);
655	//else // does not work, because all others must connect to the same router	945	}
656	// // no router found, aggressively connect to all routers	946	else
657	// for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	947	slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."),
658	// if ((*i)->conf->routerprio)	948	c->conf->nodename);
659	// (*i)->establish_connection ();
660	}	949	}
661		950
662	void	951	void
663	connection::dump_status ()	952	connection::dump_status ()
664	{	953	{
665	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	954	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
666	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	955	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
667	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	956	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
668	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"),
669	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	958	(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	}	959	}
673		960
674	void	961	void
675	vpn::dump_status ()	962	vpn::dump_status ()
676	{	963	{
677	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	964	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
678		965
679	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	966	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
680	(*c)->dump_status ();	967	(*c)->dump_status ();
681		968
682	slog (L_NOTICE, _("END status dump"));	969	slog (L_NOTICE, _("END status dump"));
683	}	970	}
684		971
685	vpn::vpn (void)	972	vpn::vpn (void)
686	: event(this, &vpn::event_cb)	973	{
		974	event .set<vpn, &vpn::event_cb > (this);
687	, udpv4_ev_watcher(this, &vpn::udpv4_ev)	975	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
688	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	976	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
689	, tap_ev_watcher (this, &vpn::tap_ev)	977	#if 1//D2
		978	ipv42_ev_watcher .set<vpn, &vpn::ipv42_ev > (this);
		979	#endif
690	#if ENABLE_TCP	980	#if ENABLE_TCP
691	, tcpv4_ev_watcher(this, &vpn::tcpv4_ev)	981	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
692	#endif	982	#endif
693	{	983	#if ENABLE_ICMP
		984	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
		985	#endif
		986	#if ENABLE_DNS
		987	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		988	#endif
		989	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
694	}	990	}
695		991
696	vpn::~vpn ()	992	vpn::~vpn ()
697	{	993	{
698	}	994	}

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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 1.62 by root, Sat Dec 17 22:05:34 2011 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 1.62 by root, Sat Dec 17 22:05:34 2011 UTC