[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 1.40 by pcg, Sat Dec 1 23:35:31 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/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	{
100		108
101	if (ipv4_fd < 0)	109	if (ipv4_fd < 0)
102	return -1;	110	return -1;
103		111
104	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	112	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		113	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
105		114
106	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	115	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
107	// this I really consider a linux bug. I am neither connected	116	// this I really consider a linux bug. I am neither connected
108	// 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
109	// fragment for me sometimes.	118	// fragment for me sometimes.
…		…
116	sockinfo si (THISNODE, PROT_IPv4);	125	sockinfo si (THISNODE, PROT_IPv4);
117		126
118	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	127	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
119	{	128	{
120	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));
121	exit (1);	130	exit (EXIT_FAILURE);
122	}	131	}
123		132
124	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	133	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
125	}	134	}
126		135
127	udpv4_fd = -1;	136	udpv4_fd = -1;
128		137
129	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	138	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
…		…
132		141
133	if (udpv4_fd < 0)	142	if (udpv4_fd < 0)
134	return -1;	143	return -1;
135		144
136	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	145	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		146	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
137		147
138	// standard daemon practise...	148	// standard daemon practise...
139	{	149	{
140	int oval = 1;	150	int oval = 1;
141	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	151	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
154	sockinfo si (THISNODE, PROT_UDPv4);	164	sockinfo si (THISNODE, PROT_UDPv4);
155		165
156	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	166	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
157	{	167	{
158	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));
159	exit (1);	169	exit (EXIT_FAILURE);
160	}	170	}
161		171
162	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	172	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
163	}	173	}
164		174
165	icmpv4_fd = -1;	175	icmpv4_fd = -1;
166		176
167	#if ENABLE_ICMP	177	#if ENABLE_ICMP
…		…
171		181
172	if (icmpv4_fd < 0)	182	if (icmpv4_fd < 0)
173	return -1;	183	return -1;
174		184
175	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	185	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		186	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
176		187
177	#ifdef ICMP_FILTER	188	#ifdef ICMP_FILTER
178	{	189	{
179	icmp_filter oval;	190	icmp_filter oval;
180	oval.data = 0xffffffff;	191	oval.data = 0xffffffff;
…		…
189	// this I really consider a linux bug. I am neither connected	200	// this I really consider a linux bug. I am neither connected
190	// 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
191	// fragment for me sometimes.	202	// fragment for me sometimes.
192	{	203	{
193	int oval = IP_PMTUDISC_DONT;	204	int oval = IP_PMTUDISC_DONT;
194	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	205	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
195	}	206	}
196	#endif	207	#endif
197		208
198	sockinfo si (THISNODE, PROT_ICMPv4);	209	sockinfo si (THISNODE, PROT_ICMPv4);
199		210
200	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	211	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
201	{	212	{
202	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));
203	exit (1);	214	exit (EXIT_FAILURE);
204	}	215	}
205		216
206	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	217	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
207	}	218	}
208	#endif	219	#endif
209		220
210	tcpv4_fd = -1;	221	tcpv4_fd = -1;
211		222
…		…
216		227
217	if (tcpv4_fd < 0)	228	if (tcpv4_fd < 0)
218	return -1;	229	return -1;
219		230
220	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	231	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		232	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
221		233
222	// standard daemon practise...	234	// standard daemon practise...
223	{	235	{
224	int oval = 1;	236	int oval = 1;
225	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	237	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
228	sockinfo si (THISNODE, PROT_TCPv4);	240	sockinfo si (THISNODE, PROT_TCPv4);
229		241
230	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	242	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
231	{	243	{
232	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));
233	exit (1);	245	exit (EXIT_FAILURE);
234	}	246	}
235		247
236	if (listen (tcpv4_fd, 5))	248	if (listen (tcpv4_fd, 5))
237	{	249	{
238	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));
239	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);
240	}	278	}
241
242	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
243	}
244	#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	/////////////////////////////////////////////////////////////////////////////
245		306
246	tap = new tap_device ();	307	tap = new tap_device ();
247	if (!tap) //D this, of course, never catches	308	if (!tap) //D this, of course, never catches
248	{	309	{
249	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	310	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
250	exit (1);	311	exit (EXIT_FAILURE);
251	}	312	}
252		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
253	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	}
254		329
255	tap_ev_watcher.start (tap->fd, POLLIN);	330	tap_ev_watcher.start (tap->fd, EV_READ);
256
257	reconnect_all ();
258		331
259	return 0;	332	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	}	333	}
289		334
290	bool	335	bool
291	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)
292	{	337	{
…		…
320		365
321	return ~sum;	366	return ~sum;
322	}	367	}
323		368
324	#if ENABLE_ICMP	369	#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	370	bool
343	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	371	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
344	{	372	{
345	#if defined(SOL_IP) && defined(IP_TOS)	373	#if defined(SOL_IP) && defined(IP_TOS)
346	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	374	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
…		…
367	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	395	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
368	#endif	396	#endif
369	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 ());
370		398
371	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	}
372	}	419	}
373		420
374	void	421	void
375	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	422	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
376	{	423	{
…		…
393	connection *c = conns[src - 1];	440	connection *c = conns[src - 1];
394		441
395	if (dst == 0)	442	if (dst == 0)
396	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	443	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
397	c->conf->nodename, (const char *)rsi);	444	c->conf->nodename, (const char *)rsi);
398	else if (dst != 0 && dst != THISNODE->id)	445	else if (dst != THISNODE->id)
399	{	446	{
400	if (THISNODE->routerprio)	447	if (THISNODE->routerprio)
401	// the tos setting gets lost here. who cares.	448	// the tos setting gets lost here. who cares.
402	conns[dst - 1]->inject_vpn_packet (pkt);	449	conns[dst - 1]->inject_vpn_packet (pkt);
403	else	450	else
…		…
409	else	456	else
410	c->recv_vpn_packet (pkt, rsi);	457	c->recv_vpn_packet (pkt, rsi);
411	}	458	}
412	}	459	}
413		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
414	void	490	void
415	vpn::ipv4_ev (io_watcher &w, short revents)	491	vpn::ipv4_ev (ev::io &w, int revents)
416	{	492	{
417	if (revents & (POLLIN \| POLLERR))	493	if (revents & EV_READ)
418	{	494	{
419	vpn_packet *pkt = new vpn_packet;	495	vpn_packet *pkt = new vpn_packet;
420	struct sockaddr_in sa;	496	struct sockaddr_in sa;
421	socklen_t sa_len = sizeof (sa);	497	socklen_t sa_len = sizeof (sa);
422	int len;	498	int len;
…		…
427		503
428	if (len > 0)	504	if (len > 0)
429	{	505	{
430	pkt->len = len;	506	pkt->len = len;
431		507
432	// 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
433	// this is slow, but...
434	pkt->skip_hdr (IP_OVERHEAD);	509	pkt->skip_hdr (IP_OVERHEAD);
435		510
436	recv_vpn_packet (pkt, si);	511	recv_vpn_packet (pkt, si);
437	}	512	}
438	else	513	else
…		…
441	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	516	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
442	}	517	}
443		518
444	delete pkt;	519	delete pkt;
445	}	520	}
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	521	else
453	{	522	{
454	slog (L_ERR,	523	slog (L_ERR,
455	_("FATAL: unknown revents %08x in socket, terminating\n"),	524	_("FATAL: unknown revents %08x in socket, terminating\n"),
456	revents);	525	revents);
457	exit (1);	526	exit (EXIT_FAILURE);
458	}	527	}
459	}	528	}
460		529
461	#if ENABLE_ICMP	530	#if ENABLE_ICMP
462	void	531	void
463	vpn::icmpv4_ev (io_watcher &w, short revents)	532	vpn::icmpv4_ev (ev::io &w, int revents)
464	{	533	{
465	if (revents & (POLLIN \| POLLERR))	534	if (revents & EV_READ)
466	{	535	{
467	vpn_packet *pkt = new vpn_packet;	536	vpn_packet *pkt = new vpn_packet;
468	struct sockaddr_in sa;	537	struct sockaddr_in sa;
469	socklen_t sa_len = sizeof (sa);	538	socklen_t sa_len = sizeof (sa);
470	int len;	539	int len;
…		…
495	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	564	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
496	}	565	}
497		566
498	delete pkt;	567	delete pkt;
499	}	568	}
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	569	else
507	{	570	{
508	slog (L_ERR,	571	slog (L_ERR,
509	_("FATAL: unknown revents %08x in socket, terminating\n"),	572	_("FATAL: unknown revents %08x in socket, terminating\n"),
510	revents);	573	revents);
511	exit (1);	574	exit (EXIT_FAILURE);
512	}	575	}
513	}	576	}
514	#endif	577	#endif
515		578
516	void	579	void
517	vpn::udpv4_ev (io_watcher &w, short revents)	580	vpn::udpv4_ev (ev::io &w, int revents)
518	{	581	{
519	if (revents & (POLLIN \| POLLERR))	582	if (revents & EV_READ)
520	{	583	{
521	vpn_packet *pkt = new vpn_packet;	584	vpn_packet *pkt = new vpn_packet;
522	struct sockaddr_in sa;	585	struct sockaddr_in sa;
523	socklen_t sa_len = sizeof (sa);	586	socklen_t sa_len = sizeof (sa);
524	int len;	587	int len;
…		…
539	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));
540	}	603	}
541		604
542	delete pkt;	605	delete pkt;
543	}	606	}
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	607	else
551	{	608	{
552	slog (L_ERR,	609	slog (L_ERR,
553	_("FATAL: unknown revents %08x in socket, terminating\n"),	610	_("FATAL: unknown revents %08x in socket, terminating\n"),
554	revents);	611	revents);
555	exit (1);	612	exit (EXIT_FAILURE);
556	}	613	}
557	}	614	}
558		615
559	void	616	void
560	vpn::tap_ev (io_watcher &w, short revents)	617	vpn::tap_ev (ev::io &w, int revents)
561	{	618	{
562	if (revents & POLLIN)	619	if (revents & EV_READ)
563	{	620	{
564	/* process data */	621	/* process data */
565	tap_packet *pkt;	622	tap_packet *pkt;
566		623
567	pkt = tap->recv ();	624	pkt = tap->recv ();
568		625
		626	if (!pkt)
		627	return;
		628
		629	if (pkt->len > 14)
		630	{
569	int dst = mac2id (pkt->dst);	631	int dst = mac2id (pkt->dst);
570	int src = mac2id (pkt->src);	632	int src = mac2id (pkt->src);
571		633
572	if (src != THISNODE->id)	634	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	{	635	{
590	// unicast	636	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
591	if (dst != THISNODE->id)	637	exit (EXIT_FAILURE);
592	conns[dst - 1]->inject_data_packet (pkt);
593	}	638	}
		639
		640	if (dst == THISNODE->id)
		641	{
		642	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		643	exit (EXIT_FAILURE);
		644	}
		645
		646	if (dst > conns.size ())
		647	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
594	else	648	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);	649	inject_data_packet (pkt, dst);
601	}
602	}	650	}
603		651
604	delete pkt;	652	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	}	653	}
611	else	654	else
612	abort ();	655	abort ();
613	}	656	}
614		657
615	void	658	void
616	vpn::event_cb (time_watcher &w)	659	vpn::event_cb (ev::timer &w, int)
617	{	660	{
618	if (events)	661	if (events)
619	{	662	{
620	if (events & EVENT_SHUTDOWN)	663	if (events & EVENT_SHUTDOWN)
621	{	664	{
622	slog (L_INFO, _("preparing shutdown..."));	665	slog (L_INFO, _("preparing shutdown..."));
623		666
624	shutdown_all ();	667	shutdown_all ();
625
626	remove_pid (pidfilename);	668	remove_pid (conf.pidfilename);
627
628	slog (L_INFO, _("terminating"));	669	slog (L_INFO, _("terminating"));
629		670	exit (EXIT_SUCCESS);
630	exit (0);
631	}	671	}
632		672
633	if (events & EVENT_RECONNECT)	673	if (events & EVENT_RECONNECT)
634	{	674	{
635	slog (L_INFO, _("forced reconnect"));	675	slog (L_INFO, _("forced reconnect"));
…		…
637	reconnect_all ();	677	reconnect_all ();
638	}	678	}
639		679
640	events = 0;	680	events = 0;
641	}	681	}
642
643	w.at = TSTAMP_CANCEL;
644	}	682	}
645		683
646	void	684	void
647	vpn::shutdown_all ()	685	vpn::shutdown_all ()
648	{	686	{
…		…
661	connection_init ();	699	connection_init ();
662		700
663	for (configuration::node_vector::iterator i = conf.nodes.begin ();	701	for (configuration::node_vector::iterator i = conf.nodes.begin ();
664	i != conf.nodes.end (); ++i)	702	i != conf.nodes.end (); ++i)
665	{	703	{
666	connection *conn = new connection (this);	704	connection conn = new connection (this, i);
667
668	conn->conf = *i;
669	conns.push_back (conn);	705	conns.push_back (conn);
670
671	conn->establish_connection ();	706	conn->establish_connection ();
672	}	707	}
673	}	708	}
674		709
675	connection *vpn::find_router ()	710	connection *vpn::find_router ()
…		…
720	}	755	}
721		756
722	void	757	void
723	vpn::dump_status ()	758	vpn::dump_status ()
724	{	759	{
725	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	760	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
726		761
727	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	762	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
728	(*c)->dump_status ();	763	(*c)->dump_status ();
729		764
730	slog (L_NOTICE, _("END status dump"));	765	slog (L_NOTICE, _("END status dump"));
…		…
738	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	773	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
739	#endif	774	#endif
740	#if ENABLE_ICMP	775	#if ENABLE_ICMP
741	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	776	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
742	#endif	777	#endif
		778	#if ENABLE_DNS
		779	, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)
		780	#endif
743	, tap_ev_watcher (this, &vpn::tap_ev)	781	, tap_ev_watcher (this, &vpn::tap_ev)
744	{	782	{
745	}	783	}
746		784
747	vpn::~vpn ()	785	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 1.40 by pcg, Sat Dec 1 23:35:31 2007 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 1.40 by pcg, Sat Dec 1 23:35:31 2007 UTC