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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.17 by pcg, Wed Oct 15 06:06:41 2003 UTC vs.
Revision 1.39 by pcg, Sat Nov 10 05:14:22 2007 UTC

…		…
1	/*	1	/*
2	vpn.C -- handle the protocol, encryption, handshaking etc.	2	vpn.C -- handle the protocol, encryption, handshaking etc.
		3	Copyright (C) 2003-2005 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
5	it under the terms of the GNU General Public License as published by	8	it under the terms of the GNU General Public License as published by
6	the Free Software Foundation; either version 2 of the License, or	9	the Free Software Foundation; either version 2 of the License, or
7	(at your option) any later version.	10	(at your 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,
10	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	but 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
12	GNU General Public License for more details.	15	GNU General 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
15	along with this program; if not, write to the Free Software	18	along with gvpe; if not, write to the Free Software
16	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19	Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17	*/	20	*/
18		21
19	#include "config.h"	22	#include "config.h"
20		23
21	#include <list>	24	#include <list>
22		25
		26	#include <cstdio>
		27	#include <cstring>
23	#include <cstdlib>	28	#include <cstdlib>
24	#include <cstring>
25	#include <cstdio>
26		29
27	#include <sys/types.h>	30	#include <sys/types.h>
28	#include <sys/socket.h>	31	#include <sys/socket.h>
29	#include <sys/wait.h>	32	#include <sys/wait.h>
30	#include <errno.h>	33	#include <errno.h>
39		42
40	#include "connection.h"	43	#include "connection.h"
41	#include "util.h"	44	#include "util.h"
42	#include "vpn.h"	45	#include "vpn.h"
43		46
		47	vpn network; // THE vpn (bad design...)
		48
44	/////////////////////////////////////////////////////////////////////////////	49	/////////////////////////////////////////////////////////////////////////////
45		50
46	const char *vpn::script_if_up ()	51	void
		52	vpn::script_init_env ()
47	{	53	{
48	// the tunnel device mtu should be the physical mtu - overhead	54	// the tunnel device mtu should be the physical mtu - overhead
49	// the tricky part is rounding to the cipher key blocksize	55	// the tricky part is rounding to the cipher key blocksize
50	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	56	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
51	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	57	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
52	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	58	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
53	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	59	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
54		60
55	char *env;	61	char *env;
56	asprintf (&env, "CONFBASE=%s", confbase);	62	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
57	putenv (env);
58	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
59	putenv (env);
60	asprintf (&env, "NODEID=%d", THISNODE->id);
61	putenv (env);
62	asprintf (&env, "IFNAME=%s", tap->interface ());	63	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
63	putenv (env);	64	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		65	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
64	asprintf (&env, "MTU=%d", mtu);	66	asprintf (&env, "MTU=%d", mtu); putenv (env);
65	putenv (env);	67	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
66	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	68	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
67	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
68	THISNODE->id & 0xff);
69	putenv (env);
70		69
		70	conns [THISNODE->id - 1]->script_init_env ("");
		71
		72	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		73	{
		74	char ext[16];
		75	snprintf (ext, 16, "_%d", (*c)->conf->id);
		76	(*c)->script_init_env (ext);
		77	}
		78	}
		79
		80	const char *vpn::script_if_init ()
		81	{
		82	script_init_env ();
		83
		84	return tap->if_up ();
		85	}
		86
		87	const char *vpn::script_if_up ()
		88	{
		89	script_init_env ();
		90
		91	char *filename;
		92	asprintf (&filename,
		93	"%s/%s",
		94	confbase,
71	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	95	::conf.script_if_up ? ::conf.script_if_up : "if-up");
		96
		97	return filename;
72	}	98	}
73		99
74	int	100	int
75	vpn::setup ()	101	vpn::setup ()
76	{	102	{
…		…
82		108
83	if (ipv4_fd < 0)	109	if (ipv4_fd < 0)
84	return -1;	110	return -1;
85		111
86	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	112	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		113	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
87		114
88	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	115	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
89	// this I really consider a linux bug. I am neither connected	116	// this I really consider a linux bug. I am neither connected
90	// nor do I fragment myself. Linux still sets DF and doesn't	117	// nor do I fragment myself. Linux still sets DF and doesn't
91	// fragment for me sometimes.	118	// fragment for me sometimes.
…		…
98	sockinfo si (THISNODE, PROT_IPv4);	125	sockinfo si (THISNODE, PROT_IPv4);
99		126
100	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	127	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
101	{	128	{
102	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	129	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
103	exit (1);	130	exit (EXIT_FAILURE);
104	}	131	}
105		132
106	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	133	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
107	}	134	}
108		135
109	udpv4_fd = -1;	136	udpv4_fd = -1;
110		137
111	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	138	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
…		…
114		141
115	if (udpv4_fd < 0)	142	if (udpv4_fd < 0)
116	return -1;	143	return -1;
117		144
118	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	145	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		146	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
119		147
120	// standard daemon practise...	148	// standard daemon practise...
121	{	149	{
122	int oval = 1;	150	int oval = 1;
123	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	151	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
136	sockinfo si (THISNODE, PROT_UDPv4);	164	sockinfo si (THISNODE, PROT_UDPv4);
137		165
138	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	166	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
139	{	167	{
140	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	168	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
141	exit (1);	169	exit (EXIT_FAILURE);
142	}	170	}
143		171
144	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	172	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
145	}	173	}
146		174
147	icmpv4_fd = -1;	175	icmpv4_fd = -1;
148		176
149	#if ENABLE_ICMP	177	#if ENABLE_ICMP
…		…
153		181
154	if (icmpv4_fd < 0)	182	if (icmpv4_fd < 0)
155	return -1;	183	return -1;
156		184
157	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	185	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		186	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
158		187
159	#ifdef ICMP_FILTER	188	#ifdef ICMP_FILTER
160	{	189	{
161	icmp_filter oval;	190	icmp_filter oval;
162	oval.data = 0xffffffff;	191	oval.data = 0xffffffff;
…		…
171	// this I really consider a linux bug. I am neither connected	200	// this I really consider a linux bug. I am neither connected
172	// nor do I fragment myself. Linux still sets DF and doesn't	201	// nor do I fragment myself. Linux still sets DF and doesn't
173	// fragment for me sometimes.	202	// fragment for me sometimes.
174	{	203	{
175	int oval = IP_PMTUDISC_DONT;	204	int oval = IP_PMTUDISC_DONT;
176	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	205	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
177	}	206	}
178	#endif	207	#endif
179		208
180	sockinfo si (THISNODE, PROT_ICMPv4);	209	sockinfo si (THISNODE, PROT_ICMPv4);
181		210
182	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	211	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
183	{	212	{
184	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	213	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
185	exit (1);	214	exit (EXIT_FAILURE);
186	}	215	}
187		216
188	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	217	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
189	}	218	}
190	#endif	219	#endif
191		220
192	tcpv4_fd = -1;	221	tcpv4_fd = -1;
193		222
…		…
198		227
199	if (tcpv4_fd < 0)	228	if (tcpv4_fd < 0)
200	return -1;	229	return -1;
201		230
202	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	231	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		232	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
203		233
204	// standard daemon practise...	234	// standard daemon practise...
205	{	235	{
206	int oval = 1;	236	int oval = 1;
207	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	237	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
210	sockinfo si (THISNODE, PROT_TCPv4);	240	sockinfo si (THISNODE, PROT_TCPv4);
211		241
212	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	242	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
213	{	243	{
214	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	244	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
215	exit (1);	245	exit (EXIT_FAILURE);
216	}	246	}
217		247
218	if (listen (tcpv4_fd, 5))	248	if (listen (tcpv4_fd, 5))
219	{	249	{
220	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	250	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
221	exit (1);	251	exit (EXIT_FAILURE);
		252	}
		253
		254	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		255	}
		256	#endif
		257
		258	#if ENABLE_DNS
		259	if (THISNODE->protocols & PROT_DNSv4)
		260	{
		261	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		262
		263	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		264
		265	if (dnsv4_fd < 0)
		266	return -1;
		267
		268	fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK);
		269	fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC);
		270
		271	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		272	// this I really consider a linux bug. I am neither connected
		273	// nor do I fragment myself. Linux still sets DF and doesn't
		274	// fragment for me sometimes.
		275	{
		276	int oval = IP_PMTUDISC_DONT;
		277	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
222	}	278	}
223
224	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
225	}
226	#endif	279	# endif
		280
		281	// standard daemon practise...
		282	{
		283	int oval = 1;
		284	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		285	}
		286
		287	sockinfo si (THISNODE->dns_hostname,
		288	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		289	PROT_DNSv4);
		290
		291	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		292	{
		293	slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
		294	exit (EXIT_FAILURE);
		295	}
		296
		297	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		298	}
		299	#endif
		300
		301	/////////////////////////////////////////////////////////////////////////////
		302
		303	reconnect_all ();
		304
		305	/////////////////////////////////////////////////////////////////////////////
227		306
228	tap = new tap_device ();	307	tap = new tap_device ();
229	if (!tap) //D this, of course, never catches	308	if (!tap) //D this, of course, never catches
230	{	309	{
231	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	310	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
232	exit (1);	311	exit (EXIT_FAILURE);
233	}	312	}
234		313
		314	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
		315
		316	if (tap->if_up () &&
		317	!run_script (run_script_cb (this, &vpn::script_if_init), true))
		318	{
		319	slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
		320	tap->if_up ());
		321	exit (EXIT_FAILURE);
		322	}
		323
235	run_script (run_script_cb (this, &vpn::script_if_up), true);	324	if (!run_script (run_script_cb (this, &vpn::script_if_up), true))
		325	{
		326	slog (L_ERR, _("if-up command execution failed, exiting."));
		327	exit (EXIT_FAILURE);
		328	}
236		329
237	tap_ev_watcher.start (tap->fd, POLLIN);	330	tap_ev_watcher.start (tap->fd, EV_READ);
238
239	reconnect_all ();
240		331
241	return 0;	332	return 0;
242	}
243
244	// send a vpn packet out to other hosts
245	bool
246	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
247	{
248	switch (si.prot)
249	{
250	case PROT_IPv4:
251	return send_ipv4_packet (pkt, si, tos);
252
253	case PROT_UDPv4:
254	return send_udpv4_packet (pkt, si, tos);
255
256	#if ENABLE_TCP
257	case PROT_TCPv4:
258	return send_tcpv4_packet (pkt, si, tos);
259	#endif
260
261	#if ENABLE_ICMP
262	case PROT_ICMPv4:
263	return send_icmpv4_packet (pkt, si, tos);
264	#endif
265
266	default:
267	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
268	return false;
269	}
270	}	333	}
271		334
272	bool	335	bool
273	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	336	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
274	{	337	{
…		…
332	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	395	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
333	#endif	396	#endif
334	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	397	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
335		398
336	return true;	399	return true;
		400	}
		401
		402	void
		403	vpn::inject_data_packet (tap_packet *pkt, int dst)
		404	{
		405	if (dst)
		406	{
		407	// unicast
		408	if (dst != THISNODE->id)
		409	conns[dst - 1]->inject_data_packet (pkt);
		410	}
		411	else
		412	{
		413	// broadcast, this is ugly, but due to the security policy
		414	// we have to connect to all hosts...
		415	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		416	if ((*c)->conf != THISNODE)
		417	(*c)->inject_data_packet (pkt, true);
		418	}
337	}	419	}
338		420
339	void	421	void
340	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	422	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
341	{	423	{
…		…
358	connection *c = conns[src - 1];	440	connection *c = conns[src - 1];
359		441
360	if (dst == 0)	442	if (dst == 0)
361	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	443	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
362	c->conf->nodename, (const char *)rsi);	444	c->conf->nodename, (const char *)rsi);
363	else if (dst != 0 && dst != THISNODE->id)	445	else if (dst != THISNODE->id)
364	{	446	{
365	if (THISNODE->routerprio)	447	if (THISNODE->routerprio)
366	// the tos setting gets lost here. who cares.	448	// the tos setting gets lost here. who cares.
367	conns[dst - 1]->inject_vpn_packet (pkt);	449	conns[dst - 1]->inject_vpn_packet (pkt);
368	else	450	else
…		…
374	else	456	else
375	c->recv_vpn_packet (pkt, rsi);	457	c->recv_vpn_packet (pkt, rsi);
376	}	458	}
377	}	459	}
378		460
		461	bool
		462	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		463	{
		464	switch (si.prot)
		465	{
		466	case PROT_IPv4:
		467	return send_ipv4_packet (pkt, si, tos);
		468	case PROT_UDPv4:
		469	return send_udpv4_packet (pkt, si, tos);
		470	#if ENABLE_TCP
		471	case PROT_TCPv4:
		472	return send_tcpv4_packet (pkt, si, tos);
		473	#endif
		474	#if ENABLE_ICMP
		475	case PROT_ICMPv4:
		476	return send_icmpv4_packet (pkt, si, tos);
		477	#endif
		478	#if ENABLE_DNS
		479	case PROT_DNSv4:
		480	return send_dnsv4_packet (pkt, si, tos);
		481	#endif
		482
		483	default:
		484	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
		485	}
		486
		487	return false;
		488	}
		489
379	void	490	void
380	vpn::ipv4_ev (io_watcher &w, short revents)	491	vpn::ipv4_ev (ev::io &w, int revents)
381	{	492	{
382	if (revents & (POLLIN \| POLLERR))	493	if (revents & EV_READ)
383	{	494	{
384	vpn_packet *pkt = new vpn_packet;	495	vpn_packet *pkt = new vpn_packet;
385	struct sockaddr_in sa;	496	struct sockaddr_in sa;
386	socklen_t sa_len = sizeof (sa);	497	socklen_t sa_len = sizeof (sa);
387	int len;	498	int len;
…		…
392		503
393	if (len > 0)	504	if (len > 0)
394	{	505	{
395	pkt->len = len;	506	pkt->len = len;
396		507
397	// raw sockets deliver the ipv4, but don't expect it on sends	508	// raw sockets deliver the ipv4 header, but don't expect it on sends
398	// this is slow, but...
399	pkt->skip_hdr (IP_OVERHEAD);	509	pkt->skip_hdr (IP_OVERHEAD);
400		510
401	recv_vpn_packet (pkt, si);	511	recv_vpn_packet (pkt, si);
402	}	512	}
403	else	513	else
…		…
406	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	516	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
407	}	517	}
408		518
409	delete pkt;	519	delete pkt;
410	}	520	}
411	else if (revents & POLLHUP)
412	{
413	// this cannot ;) happen on udp sockets
414	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
415	exit (1);
416	}
417	else	521	else
418	{	522	{
419	slog (L_ERR,	523	slog (L_ERR,
420	_("FATAL: unknown revents %08x in socket, terminating\n"),	524	_("FATAL: unknown revents %08x in socket, terminating\n"),
421	revents);	525	revents);
422	exit (1);	526	exit (EXIT_FAILURE);
423	}	527	}
424	}	528	}
425		529
426	#if ENABLE_ICMP	530	#if ENABLE_ICMP
427	void	531	void
428	vpn::icmpv4_ev (io_watcher &w, short revents)	532	vpn::icmpv4_ev (ev::io &w, int revents)
429	{	533	{
430	if (revents & (POLLIN \| POLLERR))	534	if (revents & EV_READ)
431	{	535	{
432	vpn_packet *pkt = new vpn_packet;	536	vpn_packet *pkt = new vpn_packet;
433	struct sockaddr_in sa;	537	struct sockaddr_in sa;
434	socklen_t sa_len = sizeof (sa);	538	socklen_t sa_len = sizeof (sa);
435	int len;	539	int len;
…		…
460	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	564	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
461	}	565	}
462		566
463	delete pkt;	567	delete pkt;
464	}	568	}
465	else if (revents & POLLHUP)
466	{
467	// this cannot ;) happen on udp sockets
468	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
469	exit (1);
470	}
471	else	569	else
472	{	570	{
473	slog (L_ERR,	571	slog (L_ERR,
474	_("FATAL: unknown revents %08x in socket, terminating\n"),	572	_("FATAL: unknown revents %08x in socket, terminating\n"),
475	revents);	573	revents);
476	exit (1);	574	exit (EXIT_FAILURE);
477	}	575	}
478	}	576	}
479	#endif	577	#endif
480		578
481	void	579	void
482	vpn::udpv4_ev (io_watcher &w, short revents)	580	vpn::udpv4_ev (ev::io &w, int revents)
483	{	581	{
484	if (revents & (POLLIN \| POLLERR))	582	if (revents & EV_READ)
485	{	583	{
486	vpn_packet *pkt = new vpn_packet;	584	vpn_packet *pkt = new vpn_packet;
487	struct sockaddr_in sa;	585	struct sockaddr_in sa;
488	socklen_t sa_len = sizeof (sa);	586	socklen_t sa_len = sizeof (sa);
489	int len;	587	int len;
…		…
504	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	602	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
505	}	603	}
506		604
507	delete pkt;	605	delete pkt;
508	}	606	}
509	else if (revents & POLLHUP)
510	{
511	// this cannot ;) happen on udp sockets
512	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
513	exit (1);
514	}
515	else	607	else
516	{	608	{
517	slog (L_ERR,	609	slog (L_ERR,
518	_("FATAL: unknown revents %08x in socket, terminating\n"),	610	_("FATAL: unknown revents %08x in socket, terminating\n"),
519	revents);	611	revents);
520	exit (1);	612	exit (EXIT_FAILURE);
521	}	613	}
522	}	614	}
523		615
524	void	616	void
525	vpn::tap_ev (io_watcher &w, short revents)	617	vpn::tap_ev (ev::io &w, int revents)
526	{	618	{
527	if (revents & POLLIN)	619	if (revents & EV_READ)
528	{	620	{
529	/* process data */	621	/* process data */
530	tap_packet *pkt;	622	tap_packet *pkt;
531		623
532	pkt = tap->recv ();	624	pkt = tap->recv ();
…		…
539	int dst = mac2id (pkt->dst);	631	int dst = mac2id (pkt->dst);
540	int src = mac2id (pkt->src);	632	int src = mac2id (pkt->src);
541		633
542	if (src != THISNODE->id)	634	if (src != THISNODE->id)
543	{	635	{
544	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));	636	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
545	exit (1);	637	exit (EXIT_FAILURE);
546	}	638	}
547		639
548	if (dst == THISNODE->id)	640	if (dst == THISNODE->id)
549	{	641	{
550	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));	642	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
551	exit (1);	643	exit (EXIT_FAILURE);
552	}	644	}
553		645
554	if (dst > conns.size ())	646	if (dst > conns.size ())
555	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);	647	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
556	else	648	else
557	{
558	if (dst)
559	{
560	// unicast
561	if (dst != THISNODE->id)
562	conns[dst - 1]->inject_data_packet (pkt);
563	}
564	else
565	{
566	// broadcast, this is ugly, but due to the security policy
567	// we have to connect to all hosts...
568	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
569	if ((*c)->conf != THISNODE)
570	(*c)->inject_data_packet (pkt);	649	inject_data_packet (pkt, dst);
571	}
572	}
573	}	650	}
574		651
575	delete pkt;	652	delete pkt;
576	}
577	else if (revents & (POLLHUP \| POLLERR))
578	{
579	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
580	exit (1);
581	}	653	}
582	else	654	else
583	abort ();	655	abort ();
584	}	656	}
585		657
586	void	658	void
587	vpn::event_cb (time_watcher &w)	659	vpn::event_cb (ev::timer &w, int)
588	{	660	{
589	if (events)	661	if (events)
590	{	662	{
591	if (events & EVENT_SHUTDOWN)	663	if (events & EVENT_SHUTDOWN)
592	{	664	{
593	slog (L_INFO, _("preparing shutdown..."));	665	slog (L_INFO, _("preparing shutdown..."));
594		666
595	shutdown_all ();	667	shutdown_all ();
596
597	remove_pid (pidfilename);	668	remove_pid (conf.pidfilename);
598
599	slog (L_INFO, _("terminating"));	669	slog (L_INFO, _("terminating"));
600		670	exit (EXIT_SUCCESS);
601	exit (0);
602	}	671	}
603		672
604	if (events & EVENT_RECONNECT)	673	if (events & EVENT_RECONNECT)
605	{	674	{
606	slog (L_INFO, _("forced reconnect"));	675	slog (L_INFO, _("forced reconnect"));
…		…
608	reconnect_all ();	677	reconnect_all ();
609	}	678	}
610		679
611	events = 0;	680	events = 0;
612	}	681	}
613
614	w.at = TSTAMP_CANCEL;
615	}	682	}
616		683
617	void	684	void
618	vpn::shutdown_all ()	685	vpn::shutdown_all ()
619	{	686	{
…		…
632	connection_init ();	699	connection_init ();
633		700
634	for (configuration::node_vector::iterator i = conf.nodes.begin ();	701	for (configuration::node_vector::iterator i = conf.nodes.begin ();
635	i != conf.nodes.end (); ++i)	702	i != conf.nodes.end (); ++i)
636	{	703	{
637	connection *conn = new connection (this);	704	connection conn = new connection (this, i);
638
639	conn->conf = *i;
640	conns.push_back (conn);	705	conns.push_back (conn);
641
642	conn->establish_connection ();	706	conn->establish_connection ();
643	}	707	}
644	}	708	}
645		709
646	connection *vpn::find_router ()	710	connection *vpn::find_router ()
…		…
691	}	755	}
692		756
693	void	757	void
694	vpn::dump_status ()	758	vpn::dump_status ()
695	{	759	{
696	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	760	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev::ev_now ());
697		761
698	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	762	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
699	(*c)->dump_status ();	763	(*c)->dump_status ();
700		764
701	slog (L_NOTICE, _("END status dump"));	765	slog (L_NOTICE, _("END status dump"));
…		…
709	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	773	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
710	#endif	774	#endif
711	#if ENABLE_ICMP	775	#if ENABLE_ICMP
712	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	776	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
713	#endif	777	#endif
		778	#if ENABLE_DNS
		779	, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)
		780	#endif
714	, tap_ev_watcher (this, &vpn::tap_ev)	781	, tap_ev_watcher (this, &vpn::tap_ev)
715	{	782	{
716	}	783	}
717		784
718	vpn::~vpn ()	785	vpn::~vpn ()

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Comparing gvpe/src/vpn.C (file contents): Revision 1.17 by pcg, Wed Oct 15 06:06:41 2003 UTC vs. Revision 1.39 by pcg, Sat Nov 10 05:14:22 2007 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.17 by pcg, Wed Oct 15 06:06:41 2003 UTC vs.
Revision 1.39 by pcg, Sat Nov 10 05:14:22 2007 UTC