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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs.
Revision 1.34 by pcg, Sat Mar 26 03:16:24 2005 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. 59 Temple Place, Suite 330, Boston, MA 02111-1307 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/poll.h>
30	#include <sys/wait.h>	32	#include <sys/wait.h>
31	#include <errno.h>	33	#include <errno.h>
32	#include <time.h>	34	#include <time.h>
33	#include <unistd.h>	35	#include <unistd.h>
34	#include <fcntl.h>	36	#include <fcntl.h>
35	#include <sys/socket.h>	37	#include <sys/socket.h>
36	#include <netinet/in.h>	38
37	#include <arpa/inet.h>	39	#include "netcompat.h"
38	#include <net/if.h>
39	#ifdef HAVE_NETINET_IN_SYSTM_H
40	# include <netinet/in_systm.h>
41	#endif
42	#ifdef HAVE_NETINET_IP_H
43	# include <netinet/ip.h>
44	#endif
45	#ifdef HAVE_NETINET_TCP_H
46	# include <netinet/tcp.h>
47	#endif
48	#if ENABLE_ICMP
49	# include <netinet/ip_icmp.h>
50	#endif
51		40
52	#include "pidfile.h"	41	#include "pidfile.h"
53		42
54	#include "connection.h"	43	#include "connection.h"
55	#include "util.h"	44	#include "util.h"
56	#include "vpn.h"	45	#include "vpn.h"
57		46
58	#if !defined(SOL_IP) && defined(IPPROTO_IP)	47	vpn network; // THE vpn (bad design...)
59	# define SOL_IP IPPROTO_IP
60	#endif
61		48
62	/////////////////////////////////////////////////////////////////////////////	49	/////////////////////////////////////////////////////////////////////////////
63		50
64	const char *vpn::script_if_up ()	51	void
		52	vpn::script_init_env ()
65	{	53	{
66	// the tunnel device mtu should be the physical mtu - overhead	54	// the tunnel device mtu should be the physical mtu - overhead
67	// the tricky part is rounding to the cipher key blocksize	55	// the tricky part is rounding to the cipher key blocksize
68	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	56	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
69	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	57	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
70	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	58	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
71	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	59	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
72		60
73	char *env;	61	char *env;
74	asprintf (&env, "CONFBASE=%s", confbase);	62	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
75	putenv (env);
76	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
77	putenv (env);
78	asprintf (&env, "NODEID=%d", THISNODE->id);
79	putenv (env);
80	asprintf (&env, "IFNAME=%s", tap->interface ());	63	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
81	putenv (env);	64	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		65	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
82	asprintf (&env, "MTU=%d", mtu);	66	asprintf (&env, "MTU=%d", mtu); putenv (env);
83	putenv (env);	67	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
84	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	68	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
85	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
86	THISNODE->id & 0xff);
87	putenv (env);
88		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,
89	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;
90	}	98	}
91		99
92	int	100	int
93	vpn::setup ()	101	vpn::setup ()
94	{	102	{
116	sockinfo si (THISNODE, PROT_IPv4);	124	sockinfo si (THISNODE, PROT_IPv4);
117		125
118	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	126	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
119	{	127	{
120	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	128	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
121	exit (1);	129	exit (EXIT_FAILURE);
122	}	130	}
123		131
124	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	132	ipv4_ev_watcher.start (ipv4_fd, EVENT_READ);
125	}	133	}
126		134
127	udpv4_fd = -1;	135	udpv4_fd = -1;
128		136
129	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	137	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
…		…
154	sockinfo si (THISNODE, PROT_UDPv4);	162	sockinfo si (THISNODE, PROT_UDPv4);
155		163
156	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	164	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
157	{	165	{
158	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	166	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
159	exit (1);	167	exit (EXIT_FAILURE);
160	}	168	}
161		169
162	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	170	udpv4_ev_watcher.start (udpv4_fd, EVENT_READ);
163	}	171	}
164		172
165	icmpv4_fd = -1;	173	icmpv4_fd = -1;
166		174
167	#if ENABLE_ICMP	175	#if ENABLE_ICMP
…		…
198	sockinfo si (THISNODE, PROT_ICMPv4);	206	sockinfo si (THISNODE, PROT_ICMPv4);
199		207
200	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	208	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
201	{	209	{
202	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	210	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
203	exit (1);	211	exit (EXIT_FAILURE);
204	}	212	}
205		213
206	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	214	icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ);
207	}	215	}
208	#endif	216	#endif
209		217
210	tcpv4_fd = -1;	218	tcpv4_fd = -1;
211		219
…		…
228	sockinfo si (THISNODE, PROT_TCPv4);	236	sockinfo si (THISNODE, PROT_TCPv4);
229		237
230	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	238	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
231	{	239	{
232	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	240	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
233	exit (1);	241	exit (EXIT_FAILURE);
234	}	242	}
235		243
236	if (listen (tcpv4_fd, 5))	244	if (listen (tcpv4_fd, 5))
237	{	245	{
238	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	246	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
239	exit (1);	247	exit (EXIT_FAILURE);
		248	}
		249
		250	tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ);
		251	}
		252	#endif
		253
		254	#if ENABLE_DNS
		255	if (THISNODE->protocols & PROT_DNSv4)
		256	{
		257	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		258
		259	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		260
		261	if (dnsv4_fd < 0)
		262	return -1;
		263
		264	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		265	// this I really consider a linux bug. I am neither connected
		266	// nor do I fragment myself. Linux still sets DF and doesn't
		267	// fragment for me sometimes.
		268	{
		269	int oval = IP_PMTUDISC_DONT;
		270	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		271	}
		272	#endif
		273
		274	// standard daemon practise...
		275	{
		276	int oval = 1;
		277	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		278	}
		279
		280	sockinfo si (THISNODE->dns_hostname,
		281	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		282	PROT_DNSv4);
		283
		284	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
240	}	285	{
		286	slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
		287	exit (EXIT_FAILURE);
		288	}
241		289
242	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);	290	dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ);
243	}	291	}
244	#endif	292	#endif
		293
		294	/////////////////////////////////////////////////////////////////////////////
		295
		296	reconnect_all ();
		297
		298	/////////////////////////////////////////////////////////////////////////////
245		299
246	tap = new tap_device ();	300	tap = new tap_device ();
247	if (!tap) //D this, of course, never catches	301	if (!tap) //D this, of course, never catches
248	{	302	{
249	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	303	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
250	exit (1);	304	exit (EXIT_FAILURE);
251	}	305	}
252		306
		307	if (tap->if_up () &&
		308	!run_script (run_script_cb (this, &vpn::script_if_init), true))
		309	{
		310	slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
		311	tap->if_up ());
		312	exit (EXIT_FAILURE);
		313	}
		314
253	run_script (run_script_cb (this, &vpn::script_if_up), true);	315	if (!run_script (run_script_cb (this, &vpn::script_if_up), true))
		316	{
		317	slog (L_ERR, _("if-up command execution failed, exiting."));
		318	exit (EXIT_FAILURE);
		319	}
254		320
255	tap_ev_watcher.start (tap->fd, POLLIN);	321	tap_ev_watcher.start (tap->fd, EVENT_READ);
256
257	reconnect_all ();
258		322
259	return 0;	323	return 0;
260	}
261
262	// send a vpn packet out to other hosts
263	bool
264	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
265	{
266	switch (si.prot)
267	{
268	case PROT_IPv4:
269	return send_ipv4_packet (pkt, si, tos);
270
271	case PROT_UDPv4:
272	return send_udpv4_packet (pkt, si, tos);
273
274	#if ENABLE_TCP
275	case PROT_TCPv4:
276	return send_tcpv4_packet (pkt, si, tos);
277	#endif
278
279	#if ENABLE_ICMP
280	case PROT_ICMPv4:
281	return send_icmpv4_packet (pkt, si, tos);
282	#endif
283
284	default:
285	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
286	return false;
287	}
288	}	324	}
289		325
290	bool	326	bool
291	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	327	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
292	{	328	{
…		…
320		356
321	return ~sum;	357	return ~sum;
322	}	358	}
323		359
324	#if ENABLE_ICMP	360	#if ENABLE_ICMP
325	struct icmp_header {
326	u8 type;
327	u8 code;
328	u16 checksum;
329	union {
330	struct {
331	u16 id;
332	u16 sequence;
333	} echo;
334	u32 gateway;
335	struct {
336	u16 unused;
337	u16 mtu;
338	} frag;
339	} un;
340	};
341
342	bool	361	bool
343	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	362	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
344	{	363	{
345	#if defined(SOL_IP) && defined(IP_TOS)	364	#if defined(SOL_IP) && defined(IP_TOS)
346	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	365	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
…		…
367	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	386	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
368	#endif	387	#endif
369	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	388	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
370		389
371	return true;	390	return true;
		391	}
		392
		393	void
		394	vpn::inject_data_packet (tap_packet *pkt, int dst)
		395	{
		396	if (dst)
		397	{
		398	// unicast
		399	if (dst != THISNODE->id)
		400	conns[dst - 1]->inject_data_packet (pkt);
		401	}
		402	else
		403	{
		404	// broadcast, this is ugly, but due to the security policy
		405	// we have to connect to all hosts...
		406	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		407	if ((*c)->conf != THISNODE)
		408	(*c)->inject_data_packet (pkt, true);
		409	}
372	}	410	}
373		411
374	void	412	void
375	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	413	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
376	{	414	{
…		…
393	connection *c = conns[src - 1];	431	connection *c = conns[src - 1];
394		432
395	if (dst == 0)	433	if (dst == 0)
396	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	434	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
397	c->conf->nodename, (const char *)rsi);	435	c->conf->nodename, (const char *)rsi);
398	else if (dst != 0 && dst != THISNODE->id)	436	else if (dst != THISNODE->id)
399	{	437	{
400	if (THISNODE->routerprio)	438	if (THISNODE->routerprio)
401	// the tos setting gets lost here. who cares.	439	// the tos setting gets lost here. who cares.
402	conns[dst - 1]->inject_vpn_packet (pkt);	440	conns[dst - 1]->inject_vpn_packet (pkt);
403	else	441	else
…		…
409	else	447	else
410	c->recv_vpn_packet (pkt, rsi);	448	c->recv_vpn_packet (pkt, rsi);
411	}	449	}
412	}	450	}
413		451
		452	bool
		453	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		454	{
		455	switch (si.prot)
		456	{
		457	case PROT_IPv4:
		458	return send_ipv4_packet (pkt, si, tos);
		459	case PROT_UDPv4:
		460	return send_udpv4_packet (pkt, si, tos);
		461	#if ENABLE_TCP
		462	case PROT_TCPv4:
		463	return send_tcpv4_packet (pkt, si, tos);
		464	#endif
		465	#if ENABLE_ICMP
		466	case PROT_ICMPv4:
		467	return send_icmpv4_packet (pkt, si, tos);
		468	#endif
		469	#if ENABLE_DNS
		470	case PROT_DNSv4:
		471	return send_dnsv4_packet (pkt, si, tos);
		472	#endif
		473
		474	default:
		475	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
		476	}
		477
		478	return false;
		479	}
		480
414	void	481	void
415	vpn::ipv4_ev (io_watcher &w, short revents)	482	vpn::ipv4_ev (io_watcher &w, short revents)
416	{	483	{
417	if (revents & (POLLIN \| POLLERR))	484	if (revents & EVENT_READ)
418	{	485	{
419	vpn_packet *pkt = new vpn_packet;	486	vpn_packet *pkt = new vpn_packet;
420	struct sockaddr_in sa;	487	struct sockaddr_in sa;
421	socklen_t sa_len = sizeof (sa);	488	socklen_t sa_len = sizeof (sa);
422	int len;	489	int len;
…		…
427		494
428	if (len > 0)	495	if (len > 0)
429	{	496	{
430	pkt->len = len;	497	pkt->len = len;
431		498
432	// raw sockets deliver the ipv4, but don't expect it on sends	499	// raw sockets deliver the ipv4 header, but don't expect it on sends
433	// this is slow, but...
434	pkt->skip_hdr (IP_OVERHEAD);	500	pkt->skip_hdr (IP_OVERHEAD);
435		501
436	recv_vpn_packet (pkt, si);	502	recv_vpn_packet (pkt, si);
437	}	503	}
438	else	504	else
…		…
441	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	507	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
442	}	508	}
443		509
444	delete pkt;	510	delete pkt;
445	}	511	}
446	else if (revents & POLLHUP)
447	{
448	// this cannot ;) happen on udp sockets
449	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
450	exit (1);
451	}
452	else	512	else
453	{	513	{
454	slog (L_ERR,	514	slog (L_ERR,
455	_("FATAL: unknown revents %08x in socket, terminating\n"),	515	_("FATAL: unknown revents %08x in socket, terminating\n"),
456	revents);	516	revents);
457	exit (1);	517	exit (EXIT_FAILURE);
458	}	518	}
459	}	519	}
460		520
461	#if ENABLE_ICMP	521	#if ENABLE_ICMP
462	void	522	void
463	vpn::icmpv4_ev (io_watcher &w, short revents)	523	vpn::icmpv4_ev (io_watcher &w, short revents)
464	{	524	{
465	if (revents & (POLLIN \| POLLERR))	525	if (revents & EVENT_READ)
466	{	526	{
467	vpn_packet *pkt = new vpn_packet;	527	vpn_packet *pkt = new vpn_packet;
468	struct sockaddr_in sa;	528	struct sockaddr_in sa;
469	socklen_t sa_len = sizeof (sa);	529	socklen_t sa_len = sizeof (sa);
470	int len;	530	int len;
…		…
495	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	555	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
496	}	556	}
497		557
498	delete pkt;	558	delete pkt;
499	}	559	}
500	else if (revents & POLLHUP)
501	{
502	// this cannot ;) happen on udp sockets
503	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
504	exit (1);
505	}
506	else	560	else
507	{	561	{
508	slog (L_ERR,	562	slog (L_ERR,
509	_("FATAL: unknown revents %08x in socket, terminating\n"),	563	_("FATAL: unknown revents %08x in socket, terminating\n"),
510	revents);	564	revents);
511	exit (1);	565	exit (EXIT_FAILURE);
512	}	566	}
513	}	567	}
514	#endif	568	#endif
515		569
516	void	570	void
517	vpn::udpv4_ev (io_watcher &w, short revents)	571	vpn::udpv4_ev (io_watcher &w, short revents)
518	{	572	{
519	if (revents & (POLLIN \| POLLERR))	573	if (revents & EVENT_READ)
520	{	574	{
521	vpn_packet *pkt = new vpn_packet;	575	vpn_packet *pkt = new vpn_packet;
522	struct sockaddr_in sa;	576	struct sockaddr_in sa;
523	socklen_t sa_len = sizeof (sa);	577	socklen_t sa_len = sizeof (sa);
524	int len;	578	int len;
…		…
539	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	593	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
540	}	594	}
541		595
542	delete pkt;	596	delete pkt;
543	}	597	}
544	else if (revents & POLLHUP)
545	{
546	// this cannot ;) happen on udp sockets
547	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
548	exit (1);
549	}
550	else	598	else
551	{	599	{
552	slog (L_ERR,	600	slog (L_ERR,
553	_("FATAL: unknown revents %08x in socket, terminating\n"),	601	_("FATAL: unknown revents %08x in socket, terminating\n"),
554	revents);	602	revents);
555	exit (1);	603	exit (EXIT_FAILURE);
556	}	604	}
557	}	605	}
558		606
559	void	607	void
560	vpn::tap_ev (io_watcher &w, short revents)	608	vpn::tap_ev (io_watcher &w, short revents)
561	{	609	{
562	if (revents & POLLIN)	610	if (revents & EVENT_READ)
563	{	611	{
564	/* process data */	612	/* process data */
565	tap_packet *pkt;	613	tap_packet *pkt;
566		614
567	pkt = tap->recv ();	615	pkt = tap->recv ();
568		616
		617	if (!pkt)
		618	return;
		619
		620	if (pkt->len > 14)
		621	{
569	int dst = mac2id (pkt->dst);	622	int dst = mac2id (pkt->dst);
570	int src = mac2id (pkt->src);	623	int src = mac2id (pkt->src);
571		624
572	if (src != THISNODE->id)	625	if (src != THISNODE->id)
573	{
574	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));
575	exit (1);
576	}
577
578	if (dst == THISNODE->id)
579	{
580	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
581	exit (1);
582	}
583
584	if (dst > conns.size ())
585	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
586	else
587	{
588	if (dst)
589	{	626	{
590	// unicast	627	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
591	if (dst != THISNODE->id)	628	exit (EXIT_FAILURE);
592	conns[dst - 1]->inject_data_packet (pkt);
593	}	629	}
		630
		631	if (dst == THISNODE->id)
		632	{
		633	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		634	exit (EXIT_FAILURE);
		635	}
		636
		637	if (dst > conns.size ())
		638	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
594	else	639	else
595	{
596	// broadcast, this is ugly, but due to the security policy
597	// we have to connect to all hosts...
598	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
599	if ((*c)->conf != THISNODE)
600	(*c)->inject_data_packet (pkt);	640	inject_data_packet (pkt, dst);
601	}
602	}	641	}
603		642
604	delete pkt;	643	delete pkt;
605	}
606	else if (revents & (POLLHUP \| POLLERR))
607	{
608	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
609	exit (1);
610	}	644	}
611	else	645	else
612	abort ();	646	abort ();
613	}	647	}
614		648
…		…
620	if (events & EVENT_SHUTDOWN)	654	if (events & EVENT_SHUTDOWN)
621	{	655	{
622	slog (L_INFO, _("preparing shutdown..."));	656	slog (L_INFO, _("preparing shutdown..."));
623		657
624	shutdown_all ();	658	shutdown_all ();
625
626	remove_pid (pidfilename);	659	remove_pid (conf.pidfilename);
627
628	slog (L_INFO, _("terminating"));	660	slog (L_INFO, _("terminating"));
629		661	exit (EXIT_SUCCESS);
630	exit (0);
631	}	662	}
632		663
633	if (events & EVENT_RECONNECT)	664	if (events & EVENT_RECONNECT)
634	{	665	{
635	slog (L_INFO, _("forced reconnect"));	666	slog (L_INFO, _("forced reconnect"));
…		…
637	reconnect_all ();	668	reconnect_all ();
638	}	669	}
639		670
640	events = 0;	671	events = 0;
641	}	672	}
642
643	w.at = TSTAMP_CANCEL;
644	}	673	}
645		674
646	void	675	void
647	vpn::shutdown_all ()	676	vpn::shutdown_all ()
648	{	677	{
…		…
661	connection_init ();	690	connection_init ();
662		691
663	for (configuration::node_vector::iterator i = conf.nodes.begin ();	692	for (configuration::node_vector::iterator i = conf.nodes.begin ();
664	i != conf.nodes.end (); ++i)	693	i != conf.nodes.end (); ++i)
665	{	694	{
666	connection *conn = new connection (this);	695	connection conn = new connection (this, i);
667
668	conn->conf = *i;
669	conns.push_back (conn);	696	conns.push_back (conn);
670
671	conn->establish_connection ();	697	conn->establish_connection ();
672	}	698	}
673	}	699	}
674		700
675	connection *vpn::find_router ()	701	connection *vpn::find_router ()
…		…
738	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	764	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
739	#endif	765	#endif
740	#if ENABLE_ICMP	766	#if ENABLE_ICMP
741	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	767	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
742	#endif	768	#endif
		769	#if ENABLE_DNS
		770	, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)
		771	#endif
743	, tap_ev_watcher (this, &vpn::tap_ev)	772	, tap_ev_watcher (this, &vpn::tap_ev)
744	{	773	{
745	}	774	}
746		775
747	vpn::~vpn ()	776	vpn::~vpn ()

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Comparing gvpe/src/vpn.C (file contents): Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs. Revision 1.34 by pcg, Sat Mar 26 03:16:24 2005 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs.
Revision 1.34 by pcg, Sat Mar 26 03:16:24 2005 UTC