[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 1.33 by pcg, Wed Mar 23 21:55:39 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);	63	asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env);
77	putenv (env);
78	asprintf (&env, "NODEID=%d", THISNODE->id);	64	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
79	putenv (env);
80	asprintf (&env, "IFNAME=%s", tap->interface ());	65	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
81	putenv (env);	66	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		67	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
82	asprintf (&env, "MTU=%d", mtu);	68	asprintf (&env, "MTU=%d", mtu); putenv (env);
83	putenv (env);
84	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	69	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",
85	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,	70	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
86	THISNODE->id & 0xff);	71	THISNODE->id & 0xff); putenv (env);
87	putenv (env);
88		72
		73	// TODO: info for other nodes, maybe?
		74	}
		75
		76	const char *vpn::script_if_init ()
		77	{
		78	script_init_env ();
		79
		80	return tap->if_up ();
		81	}
		82
		83	const char *vpn::script_if_up ()
		84	{
		85	script_init_env ();
		86
		87	char *filename;
		88	asprintf (&filename,
		89	"%s/%s",
		90	confbase,
89	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	91	::conf.script_if_up ? ::conf.script_if_up : "if-up");
		92
		93	return filename;
90	}	94	}
91		95
92	int	96	int
93	vpn::setup ()	97	vpn::setup ()
94	{	98	{
116	sockinfo si (THISNODE, PROT_IPv4);	120	sockinfo si (THISNODE, PROT_IPv4);
117		121
118	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	122	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
119	{	123	{
120	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	124	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
121	exit (1);	125	exit (EXIT_FAILURE);
122	}	126	}
123		127
124	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	128	ipv4_ev_watcher.start (ipv4_fd, EVENT_READ);
125	}	129	}
126		130
127	udpv4_fd = -1;	131	udpv4_fd = -1;
128		132
129	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	133	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
…		…
154	sockinfo si (THISNODE, PROT_UDPv4);	158	sockinfo si (THISNODE, PROT_UDPv4);
155		159
156	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	160	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
157	{	161	{
158	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	162	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
159	exit (1);	163	exit (EXIT_FAILURE);
160	}	164	}
161		165
162	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	166	udpv4_ev_watcher.start (udpv4_fd, EVENT_READ);
163	}	167	}
164		168
165	icmpv4_fd = -1;	169	icmpv4_fd = -1;
166		170
167	#if ENABLE_ICMP	171	#if ENABLE_ICMP
…		…
198	sockinfo si (THISNODE, PROT_ICMPv4);	202	sockinfo si (THISNODE, PROT_ICMPv4);
199		203
200	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	204	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
201	{	205	{
202	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	206	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
203	exit (1);	207	exit (EXIT_FAILURE);
204	}	208	}
205		209
206	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	210	icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ);
207	}	211	}
208	#endif	212	#endif
209		213
210	tcpv4_fd = -1;	214	tcpv4_fd = -1;
211		215
…		…
228	sockinfo si (THISNODE, PROT_TCPv4);	232	sockinfo si (THISNODE, PROT_TCPv4);
229		233
230	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	234	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
231	{	235	{
232	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	236	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
233	exit (1);	237	exit (EXIT_FAILURE);
234	}	238	}
235		239
236	if (listen (tcpv4_fd, 5))	240	if (listen (tcpv4_fd, 5))
237	{	241	{
238	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	242	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
239	exit (1);	243	exit (EXIT_FAILURE);
		244	}
		245
		246	tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ);
		247	}
		248	#endif
		249
		250	#if ENABLE_DNS
		251	if (THISNODE->protocols & PROT_DNSv4)
		252	{
		253	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		254
		255	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		256
		257	if (dnsv4_fd < 0)
		258	return -1;
		259
		260	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		261	// this I really consider a linux bug. I am neither connected
		262	// nor do I fragment myself. Linux still sets DF and doesn't
		263	// fragment for me sometimes.
		264	{
		265	int oval = IP_PMTUDISC_DONT;
		266	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		267	}
		268	#endif
		269
		270	// standard daemon practise...
		271	{
		272	int oval = 1;
		273	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		274	}
		275
		276	sockinfo si (THISNODE->dns_hostname,
		277	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		278	PROT_DNSv4);
		279
		280	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
240	}	281	{
		282	slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
		283	exit (EXIT_FAILURE);
		284	}
241		285
242	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);	286	dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ);
243	}	287	}
244	#endif	288	#endif
245		289
246	tap = new tap_device ();	290	tap = new tap_device ();
247	if (!tap) //D this, of course, never catches	291	if (!tap) //D this, of course, never catches
248	{	292	{
249	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	293	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
250	exit (1);	294	exit (EXIT_FAILURE);
251	}	295	}
252		296
		297	if (tap->if_up () &&
		298	!run_script (run_script_cb (this, &vpn::script_if_init), true))
		299	{
		300	slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
		301	tap->if_up ());
		302	exit (EXIT_FAILURE);
		303	}
		304
253	run_script (run_script_cb (this, &vpn::script_if_up), true);	305	if (!run_script (run_script_cb (this, &vpn::script_if_up), true))
		306	{
		307	slog (L_ERR, _("if-up command execution failed, exiting."));
		308	exit (EXIT_FAILURE);
		309	}
254		310
255	tap_ev_watcher.start (tap->fd, POLLIN);	311	tap_ev_watcher.start (tap->fd, EVENT_READ);
256		312
257	reconnect_all ();	313	reconnect_all ();
258		314
259	return 0;	315	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	}	316	}
289		317
290	bool	318	bool
291	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	319	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
292	{	320	{
…		…
320		348
321	return ~sum;	349	return ~sum;
322	}	350	}
323		351
324	#if ENABLE_ICMP	352	#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	353	bool
343	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	354	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
344	{	355	{
345	#if defined(SOL_IP) && defined(IP_TOS)	356	#if defined(SOL_IP) && defined(IP_TOS)
346	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	357	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
…		…
367	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	378	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
368	#endif	379	#endif
369	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	380	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
370		381
371	return true;	382	return true;
		383	}
		384
		385	void
		386	vpn::inject_data_packet (tap_packet *pkt, int dst)
		387	{
		388	if (dst)
		389	{
		390	// unicast
		391	if (dst != THISNODE->id)
		392	conns[dst - 1]->inject_data_packet (pkt);
		393	}
		394	else
		395	{
		396	// broadcast, this is ugly, but due to the security policy
		397	// we have to connect to all hosts...
		398	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		399	if ((*c)->conf != THISNODE)
		400	(*c)->inject_data_packet (pkt, true);
		401	}
372	}	402	}
373		403
374	void	404	void
375	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	405	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
376	{	406	{
…		…
393	connection *c = conns[src - 1];	423	connection *c = conns[src - 1];
394		424
395	if (dst == 0)	425	if (dst == 0)
396	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	426	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
397	c->conf->nodename, (const char *)rsi);	427	c->conf->nodename, (const char *)rsi);
398	else if (dst != 0 && dst != THISNODE->id)	428	else if (dst != THISNODE->id)
399	{	429	{
400	if (THISNODE->routerprio)	430	if (THISNODE->routerprio)
401	// the tos setting gets lost here. who cares.	431	// the tos setting gets lost here. who cares.
402	conns[dst - 1]->inject_vpn_packet (pkt);	432	conns[dst - 1]->inject_vpn_packet (pkt);
403	else	433	else
…		…
409	else	439	else
410	c->recv_vpn_packet (pkt, rsi);	440	c->recv_vpn_packet (pkt, rsi);
411	}	441	}
412	}	442	}
413		443
		444	bool
		445	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		446	{
		447	switch (si.prot)
		448	{
		449	case PROT_IPv4:
		450	return send_ipv4_packet (pkt, si, tos);
		451	case PROT_UDPv4:
		452	return send_udpv4_packet (pkt, si, tos);
		453	#if ENABLE_TCP
		454	case PROT_TCPv4:
		455	return send_tcpv4_packet (pkt, si, tos);
		456	#endif
		457	#if ENABLE_ICMP
		458	case PROT_ICMPv4:
		459	return send_icmpv4_packet (pkt, si, tos);
		460	#endif
		461	#if ENABLE_DNS
		462	case PROT_DNSv4:
		463	return send_dnsv4_packet (pkt, si, tos);
		464	#endif
		465
		466	default:
		467	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
		468	}
		469
		470	return false;
		471	}
		472
414	void	473	void
415	vpn::ipv4_ev (io_watcher &w, short revents)	474	vpn::ipv4_ev (io_watcher &w, short revents)
416	{	475	{
417	if (revents & (POLLIN \| POLLERR))	476	if (revents & EVENT_READ)
418	{	477	{
419	vpn_packet *pkt = new vpn_packet;	478	vpn_packet *pkt = new vpn_packet;
420	struct sockaddr_in sa;	479	struct sockaddr_in sa;
421	socklen_t sa_len = sizeof (sa);	480	socklen_t sa_len = sizeof (sa);
422	int len;	481	int len;
…		…
427		486
428	if (len > 0)	487	if (len > 0)
429	{	488	{
430	pkt->len = len;	489	pkt->len = len;
431		490
432	// raw sockets deliver the ipv4, but don't expect it on sends	491	// raw sockets deliver the ipv4 header, but don't expect it on sends
433	// this is slow, but...
434	pkt->skip_hdr (IP_OVERHEAD);	492	pkt->skip_hdr (IP_OVERHEAD);
435		493
436	recv_vpn_packet (pkt, si);	494	recv_vpn_packet (pkt, si);
437	}	495	}
438	else	496	else
…		…
441	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	499	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
442	}	500	}
443		501
444	delete pkt;	502	delete pkt;
445	}	503	}
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	504	else
453	{	505	{
454	slog (L_ERR,	506	slog (L_ERR,
455	_("FATAL: unknown revents %08x in socket, terminating\n"),	507	_("FATAL: unknown revents %08x in socket, terminating\n"),
456	revents);	508	revents);
457	exit (1);	509	exit (EXIT_FAILURE);
458	}	510	}
459	}	511	}
460		512
461	#if ENABLE_ICMP	513	#if ENABLE_ICMP
462	void	514	void
463	vpn::icmpv4_ev (io_watcher &w, short revents)	515	vpn::icmpv4_ev (io_watcher &w, short revents)
464	{	516	{
465	if (revents & (POLLIN \| POLLERR))	517	if (revents & EVENT_READ)
466	{	518	{
467	vpn_packet *pkt = new vpn_packet;	519	vpn_packet *pkt = new vpn_packet;
468	struct sockaddr_in sa;	520	struct sockaddr_in sa;
469	socklen_t sa_len = sizeof (sa);	521	socklen_t sa_len = sizeof (sa);
470	int len;	522	int len;
…		…
495	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	547	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
496	}	548	}
497		549
498	delete pkt;	550	delete pkt;
499	}	551	}
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	552	else
507	{	553	{
508	slog (L_ERR,	554	slog (L_ERR,
509	_("FATAL: unknown revents %08x in socket, terminating\n"),	555	_("FATAL: unknown revents %08x in socket, terminating\n"),
510	revents);	556	revents);
511	exit (1);	557	exit (EXIT_FAILURE);
512	}	558	}
513	}	559	}
514	#endif	560	#endif
515		561
516	void	562	void
517	vpn::udpv4_ev (io_watcher &w, short revents)	563	vpn::udpv4_ev (io_watcher &w, short revents)
518	{	564	{
519	if (revents & (POLLIN \| POLLERR))	565	if (revents & EVENT_READ)
520	{	566	{
521	vpn_packet *pkt = new vpn_packet;	567	vpn_packet *pkt = new vpn_packet;
522	struct sockaddr_in sa;	568	struct sockaddr_in sa;
523	socklen_t sa_len = sizeof (sa);	569	socklen_t sa_len = sizeof (sa);
524	int len;	570	int len;
…		…
539	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	585	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
540	}	586	}
541		587
542	delete pkt;	588	delete pkt;
543	}	589	}
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	590	else
551	{	591	{
552	slog (L_ERR,	592	slog (L_ERR,
553	_("FATAL: unknown revents %08x in socket, terminating\n"),	593	_("FATAL: unknown revents %08x in socket, terminating\n"),
554	revents);	594	revents);
555	exit (1);	595	exit (EXIT_FAILURE);
556	}	596	}
557	}	597	}
558		598
559	void	599	void
560	vpn::tap_ev (io_watcher &w, short revents)	600	vpn::tap_ev (io_watcher &w, short revents)
561	{	601	{
562	if (revents & POLLIN)	602	if (revents & EVENT_READ)
563	{	603	{
564	/* process data */	604	/* process data */
565	tap_packet *pkt;	605	tap_packet *pkt;
566		606
567	pkt = tap->recv ();	607	pkt = tap->recv ();
568		608
		609	if (!pkt)
		610	return;
		611
		612	if (pkt->len > 14)
		613	{
569	int dst = mac2id (pkt->dst);	614	int dst = mac2id (pkt->dst);
570	int src = mac2id (pkt->src);	615	int src = mac2id (pkt->src);
571		616
572	if (src != THISNODE->id)	617	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	{	618	{
590	// unicast	619	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
591	if (dst != THISNODE->id)	620	exit (EXIT_FAILURE);
592	conns[dst - 1]->inject_data_packet (pkt);
593	}	621	}
		622
		623	if (dst == THISNODE->id)
		624	{
		625	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		626	exit (EXIT_FAILURE);
		627	}
		628
		629	if (dst > conns.size ())
		630	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
594	else	631	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);	632	inject_data_packet (pkt, dst);
601	}
602	}	633	}
603		634
604	delete pkt;	635	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	}	636	}
611	else	637	else
612	abort ();	638	abort ();
613	}	639	}
614		640
…		…
620	if (events & EVENT_SHUTDOWN)	646	if (events & EVENT_SHUTDOWN)
621	{	647	{
622	slog (L_INFO, _("preparing shutdown..."));	648	slog (L_INFO, _("preparing shutdown..."));
623		649
624	shutdown_all ();	650	shutdown_all ();
625
626	remove_pid (pidfilename);	651	remove_pid (conf.pidfilename);
627
628	slog (L_INFO, _("terminating"));	652	slog (L_INFO, _("terminating"));
629		653	exit (EXIT_SUCCESS);
630	exit (0);
631	}	654	}
632		655
633	if (events & EVENT_RECONNECT)	656	if (events & EVENT_RECONNECT)
634	{	657	{
635	slog (L_INFO, _("forced reconnect"));	658	slog (L_INFO, _("forced reconnect"));
…		…
637	reconnect_all ();	660	reconnect_all ();
638	}	661	}
639		662
640	events = 0;	663	events = 0;
641	}	664	}
642
643	w.at = TSTAMP_CANCEL;
644	}	665	}
645		666
646	void	667	void
647	vpn::shutdown_all ()	668	vpn::shutdown_all ()
648	{	669	{
…		…
661	connection_init ();	682	connection_init ();
662		683
663	for (configuration::node_vector::iterator i = conf.nodes.begin ();	684	for (configuration::node_vector::iterator i = conf.nodes.begin ();
664	i != conf.nodes.end (); ++i)	685	i != conf.nodes.end (); ++i)
665	{	686	{
666	connection *conn = new connection (this);	687	connection conn = new connection (this, i);
667
668	conn->conf = *i;
669	conns.push_back (conn);	688	conns.push_back (conn);
670
671	conn->establish_connection ();	689	conn->establish_connection ();
672	}	690	}
673	}	691	}
674		692
675	connection *vpn::find_router ()	693	connection *vpn::find_router ()
…		…
738	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	756	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
739	#endif	757	#endif
740	#if ENABLE_ICMP	758	#if ENABLE_ICMP
741	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	759	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
742	#endif	760	#endif
		761	#if ENABLE_DNS
		762	, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)
		763	#endif
743	, tap_ev_watcher (this, &vpn::tap_ev)	764	, tap_ev_watcher (this, &vpn::tap_ev)
744	{	765	{
745	}	766	}
746		767
747	vpn::~vpn ()	768	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 1.33 by pcg, Wed Mar 23 21:55:39 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 1.33 by pcg, Wed Mar 23 21:55:39 2005 UTC