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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.15 by pcg, Tue Oct 14 15:48:15 2003 UTC vs.
Revision 1.48 by pcg, Sat Aug 9 18:30:55 2008 UTC

…		…
1	/*	1	/*
2	vpn.C -- handle the protocol, encryption, handshaking etc.	2	vpn.C -- handle the protocol, encryption, handshaking etc.
		3	Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
3		4
		5	This file is part of GVPE.
		6
4	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify it
5	it under the terms of the GNU General Public License as published by	8	under the terms of the GNU General Public License as published by the
6	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
7	(at your option) any later version.	10	option) any later version.
8		11
9	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful, but
10	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
12	GNU General Public License for more details.	15	Public License for more details.
13		16
14	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License along
15	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
16	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19
		20	Additional permission under GNU GPL version 3 section 7
		21
		22	If you modify this Program, or any covered work, by linking or
		23	combining it with the OpenSSL project's OpenSSL library (or a modified
		24	version of that library), containing parts covered by the terms of the
		25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
		26	additional permission to convey the resulting work. Corresponding
		27	Source for a non-source form of such a combination shall include the
		28	source code for the parts of OpenSSL used as well as that of the
		29	covered work.
17	*/	30	*/
18		31
19	#include "config.h"	32	#include "config.h"
20		33
21	#include <list>	34	#include <list>
22		35
		36	#include <cstdio>
		37	#include <cstring>
23	#include <cstdlib>	38	#include <cstdlib>
24	#include <cstring>
25	#include <cstdio>
26		39
27	#include <sys/types.h>	40	#include <sys/types.h>
28	#include <sys/socket.h>	41	#include <sys/socket.h>
29	#include <sys/poll.h>
30	#include <sys/wait.h>	42	#include <sys/wait.h>
31	#include <errno.h>	43	#include <errno.h>
32	#include <time.h>	44	#include <time.h>
33	#include <unistd.h>	45	#include <unistd.h>
34	#include <fcntl.h>	46	#include <fcntl.h>
40		52
41	#include "connection.h"	53	#include "connection.h"
42	#include "util.h"	54	#include "util.h"
43	#include "vpn.h"	55	#include "vpn.h"
44		56
		57	vpn network; // THE vpn (bad design...)
		58
45	/////////////////////////////////////////////////////////////////////////////	59	/////////////////////////////////////////////////////////////////////////////
46		60
47	const char *vpn::script_if_up ()	61	static void inline
		62	set_tos (int fd, int &tos_prev, int tos)
		63	{
		64	#if defined(SOL_IP) && defined(IP_TOS)
		65	if (tos_prev == tos)
		66	return;
		67
		68	tos_prev = tos;
		69	setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		70	#endif
		71	}
		72
		73	void
		74	vpn::script_init_env ()
48	{	75	{
49	// the tunnel device mtu should be the physical mtu - overhead	76	// the tunnel device mtu should be the physical mtu - overhead
50	// the tricky part is rounding to the cipher key blocksize	77	// the tricky part is rounding to the cipher key blocksize
51	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	78	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
52	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	79	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
53	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	80	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
54	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	81	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
55		82
56	char *env;	83	char *env;
57	asprintf (&env, "CONFBASE=%s", confbase);	84	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
58	putenv (env);
59	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
60	putenv (env);
61	asprintf (&env, "NODEID=%d", THISNODE->id);
62	putenv (env);
63	asprintf (&env, "IFNAME=%s", tap->interface ());	85	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
64	putenv (env);	86	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		87	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
65	asprintf (&env, "MTU=%d", mtu);	88	asprintf (&env, "MTU=%d", mtu); putenv (env);
66	putenv (env);	89	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
67	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	90	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
68	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
69	THISNODE->id & 0xff);
70	putenv (env);
71		91
		92	conns [THISNODE->id - 1]->script_init_env ("");
		93
		94	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		95	{
		96	char ext[16];
		97	snprintf (ext, 16, "_%d", (*c)->conf->id);
		98	(*c)->script_init_env (ext);
		99	}
		100	}
		101
		102	inline const char *
		103	vpn::script_if_init ()
		104	{
		105	script_init_env ();
		106
		107	return tap->if_up ();
		108	}
		109
		110	inline const char *
		111	vpn::script_if_up ()
		112	{
		113	script_init_env ();
		114
		115	char *filename;
		116	asprintf (&filename,
		117	"%s/%s",
		118	confbase,
72	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	119	::conf.script_if_up ? ::conf.script_if_up : "if-up");
		120
		121	return filename;
73	}	122	}
74		123
75	int	124	int
76	vpn::setup ()	125	vpn::setup ()
77	{	126	{
		127	ipv4_tos = -1;
78	ipv4_fd = -1;	128	ipv4_fd = -1;
79		129
80	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	130	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
81	{	131	{
82	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	132	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
83		133
84	if (ipv4_fd < 0)	134	if (ipv4_fd < 0)
85	return -1;	135	return -1;
86		136
87	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	137	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		138	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
88		139
89	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	140	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
90	// this I really consider a linux bug. I am neither connected	141	// this I really consider a linux bug. I am neither connected
91	// nor do I fragment myself. Linux still sets DF and doesn't	142	// nor do I fragment myself. Linux still sets DF and doesn't
92	// fragment for me sometimes.	143	// fragment for me sometimes.
…		…
99	sockinfo si (THISNODE, PROT_IPv4);	150	sockinfo si (THISNODE, PROT_IPv4);
100		151
101	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	152	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
102	{	153	{
103	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	154	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
104	exit (1);	155	exit (EXIT_FAILURE);
105	}	156	}
106		157
107	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	158	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
108	}	159	}
109		160
		161	udpv4_tos = -1;
110	udpv4_fd = -1;	162	udpv4_fd = -1;
111		163
112	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	164	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
113	{	165	{
114	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	166	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
115		167
116	if (udpv4_fd < 0)	168	if (udpv4_fd < 0)
117	return -1;	169	return -1;
118		170
119	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	171	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		172	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
120		173
121	// standard daemon practise...	174	// standard daemon practise...
122	{	175	{
123	int oval = 1;	176	int oval = 1;
124	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	177	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
137	sockinfo si (THISNODE, PROT_UDPv4);	190	sockinfo si (THISNODE, PROT_UDPv4);
138		191
139	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	192	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
140	{	193	{
141	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	194	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
142	exit (1);	195	exit (EXIT_FAILURE);
143	}	196	}
144		197
145	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	198	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
146	}	199	}
147		200
		201	icmpv4_tos = -1;
148	icmpv4_fd = -1;	202	icmpv4_fd = -1;
149		203
150	#if ENABLE_ICMP	204	#if ENABLE_ICMP
151	if (THISNODE->protocols & PROT_ICMPv4)	205	if (THISNODE->protocols & PROT_ICMPv4)
152	{	206	{
153	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	207	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
154		208
155	if (icmpv4_fd < 0)	209	if (icmpv4_fd < 0)
156	return -1;	210	return -1;
157		211
158	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	212	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		213	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
159		214
160	#ifdef ICMP_FILTER	215	#ifdef ICMP_FILTER
161	{	216	{
162	icmp_filter oval;	217	icmp_filter oval;
163	oval.data = 0xffffffff;	218	oval.data = 0xffffffff;
…		…
172	// this I really consider a linux bug. I am neither connected	227	// this I really consider a linux bug. I am neither connected
173	// nor do I fragment myself. Linux still sets DF and doesn't	228	// nor do I fragment myself. Linux still sets DF and doesn't
174	// fragment for me sometimes.	229	// fragment for me sometimes.
175	{	230	{
176	int oval = IP_PMTUDISC_DONT;	231	int oval = IP_PMTUDISC_DONT;
177	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	232	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
178	}	233	}
179	#endif	234	#endif
180		235
181	sockinfo si (THISNODE, PROT_ICMPv4);	236	sockinfo si (THISNODE, PROT_ICMPv4);
182		237
183	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	238	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
184	{	239	{
185	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	240	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
186	exit (1);	241	exit (EXIT_FAILURE);
187	}	242	}
188		243
189	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	244	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
190	}	245	}
191	#endif	246	#endif
192		247
193	tcpv4_fd = -1;	248	tcpv4_fd = -1;
194		249
…		…
199		254
200	if (tcpv4_fd < 0)	255	if (tcpv4_fd < 0)
201	return -1;	256	return -1;
202		257
203	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	258	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		259	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
204		260
205	// standard daemon practise...	261	// standard daemon practise...
206	{	262	{
207	int oval = 1;	263	int oval = 1;
208	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	264	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
211	sockinfo si (THISNODE, PROT_TCPv4);	267	sockinfo si (THISNODE, PROT_TCPv4);
212		268
213	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	269	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
214	{	270	{
215	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	271	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
216	exit (1);	272	exit (EXIT_FAILURE);
217	}	273	}
218		274
219	if (listen (tcpv4_fd, 5))	275	if (listen (tcpv4_fd, 5))
220	{	276	{
221	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	277	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
222	exit (1);	278	exit (EXIT_FAILURE);
		279	}
		280
		281	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		282	}
		283	#endif
		284
		285	dnsv4_tos = -1;
		286	dnsv4_fd = -1;
		287
		288	#if ENABLE_DNS
		289	if (THISNODE->protocols & PROT_DNSv4)
		290	{
		291	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		292
		293	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		294
		295	if (dnsv4_fd < 0)
		296	return -1;
		297
		298	fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK);
		299	fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC);
		300
		301	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		302	// this I really consider a linux bug. I am neither connected
		303	// nor do I fragment myself. Linux still sets DF and doesn't
		304	// fragment for me sometimes.
		305	{
		306	int oval = IP_PMTUDISC_DONT;
		307	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
223	}	308	}
224
225	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
226	}
227	#endif	309	# endif
		310
		311	// standard daemon practise...
		312	{
		313	int oval = 1;
		314	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		315	}
		316
		317	sockinfo si (THISNODE->dns_hostname,
		318	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		319	PROT_DNSv4);
		320
		321	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		322	{
		323	slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
		324	exit (EXIT_FAILURE);
		325	}
		326
		327	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		328	}
		329	#endif
		330
		331	/////////////////////////////////////////////////////////////////////////////
		332
		333	reconnect_all ();
		334
		335	/////////////////////////////////////////////////////////////////////////////
228		336
229	tap = new tap_device ();	337	tap = new tap_device ();
230	if (!tap) //D this, of course, never catches	338	if (!tap) //D this, of course, never catches
231	{	339	{
232	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	340	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
233	exit (1);	341	exit (EXIT_FAILURE);
234	}	342	}
235		343
236	run_script (run_script_cb (this, &vpn::script_if_up), true);	344	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
237		345
		346	run_script_cb cb;
		347	cb.set<vpn, &vpn::script_if_init> (this);
		348
		349	if (tap->if_up () &&
		350	!run_script (cb, true))
		351	{
		352	slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
		353	tap->if_up ());
		354	exit (EXIT_FAILURE);
		355	}
		356
		357	cb.set<vpn, &vpn::script_if_up> (this);
		358	if (!run_script (cb, true))
		359	{
		360	slog (L_ERR, _("if-up command execution failed, exiting."));
		361	exit (EXIT_FAILURE);
		362	}
		363
238	tap_ev_watcher.start (tap->fd, POLLIN);	364	tap_ev_watcher.start (tap->fd, EV_READ);
239
240	reconnect_all ();
241		365
242	return 0;	366	return 0;
243	}
244
245	// send a vpn packet out to other hosts
246	bool
247	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
248	{
249	switch (si.prot)
250	{
251	case PROT_IPv4:
252	return send_ipv4_packet (pkt, si, tos);
253
254	case PROT_UDPv4:
255	return send_udpv4_packet (pkt, si, tos);
256
257	#if ENABLE_TCP
258	case PROT_TCPv4:
259	return send_tcpv4_packet (pkt, si, tos);
260	#endif
261
262	#if ENABLE_ICMP
263	case PROT_ICMPv4:
264	return send_icmpv4_packet (pkt, si, tos);
265	#endif
266
267	default:
268	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
269	return false;
270	}
271	}	367	}
272		368
273	bool	369	bool
274	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	370	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
275	{	371	{
276	#if defined(SOL_IP) && defined(IP_TOS)	372	set_tos (ipv4_fd, ipv4_tos, tos);
277	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
278	#endif
279	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	373	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
280		374
281	return true;	375	return true;
282	}	376	}
283		377
…		…
306		400
307	#if ENABLE_ICMP	401	#if ENABLE_ICMP
308	bool	402	bool
309	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	403	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
310	{	404	{
311	#if defined(SOL_IP) && defined(IP_TOS)
312	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
313	#endif
314
315	pkt->unshift_hdr (4);	405	pkt->unshift_hdr (4);
316		406
317	icmp_header hdr = (icmp_header )&((*pkt)[0]);	407	icmp_header hdr = (icmp_header )&((*pkt)[0]);
318	hdr->type = ::conf.icmp_type;	408	hdr->type = ::conf.icmp_type;
319	hdr->code = 255;	409	hdr->code = 255;
320	hdr->checksum = 0;	410	hdr->checksum = 0;
321	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	411	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
322		412
		413	set_tos (icmpv4_fd, icmpv4_tos, tos);
323	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	414	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
324		415
325	return true;	416	return true;
326	}	417	}
327	#endif	418	#endif
328		419
329	bool	420	bool
330	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	421	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
331	{	422	{
332	#if defined(SOL_IP) && defined(IP_TOS)	423	set_tos (udpv4_fd, udpv4_tos, tos);
333	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
334	#endif
335	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	424	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
336		425
337	return true;	426	return true;
		427	}
		428
		429	void
		430	vpn::inject_data_packet (tap_packet *pkt, int dst)
		431	{
		432	if (dst)
		433	{
		434	// unicast
		435	if (dst != THISNODE->id)
		436	conns[dst - 1]->inject_data_packet (pkt);
		437	}
		438	else
		439	{
		440	// broadcast, this is ugly, but due to the security policy
		441	// we have to connect to all hosts...
		442	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		443	if ((*c)->conf != THISNODE)
		444	(*c)->inject_data_packet (pkt);
		445	}
338	}	446	}
339		447
340	void	448	void
341	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	449	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
342	{	450	{
…		…
359	connection *c = conns[src - 1];	467	connection *c = conns[src - 1];
360		468
361	if (dst == 0)	469	if (dst == 0)
362	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	470	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
363	c->conf->nodename, (const char *)rsi);	471	c->conf->nodename, (const char *)rsi);
364	else if (dst != 0 && dst != THISNODE->id)	472	else if (dst != THISNODE->id)
365	{	473	{
366	if (THISNODE->routerprio)	474	if (THISNODE->routerprio)
367	// the tos setting gets lost here. who cares.	475	// the tos setting gets lost here. who cares.
368	conns[dst - 1]->inject_vpn_packet (pkt);	476	conns[dst - 1]->inject_vpn_packet (pkt);
369	else	477	else
…		…
375	else	483	else
376	c->recv_vpn_packet (pkt, rsi);	484	c->recv_vpn_packet (pkt, rsi);
377	}	485	}
378	}	486	}
379		487
380	void	488	bool
		489	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		490	{
		491	switch (si.prot)
		492	{
		493	case PROT_IPv4:
		494	return send_ipv4_packet (pkt, si, tos);
		495
		496	case PROT_UDPv4:
		497	return send_udpv4_packet (pkt, si, tos);
		498
		499	#if ENABLE_TCP
		500	case PROT_TCPv4:
		501	return send_tcpv4_packet (pkt, si, tos);
		502	#endif
		503	#if ENABLE_ICMP
		504	case PROT_ICMPv4:
		505	return send_icmpv4_packet (pkt, si, tos);
		506	#endif
		507	#if ENABLE_DNS
		508	case PROT_DNSv4:
		509	return send_dnsv4_packet (pkt, si, tos);
		510	#endif
		511	default:
		512	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
		513	}
		514
		515	return false;
		516	}
		517
		518	inline void
381	vpn::ipv4_ev (io_watcher &w, short revents)	519	vpn::ipv4_ev (ev::io &w, int revents)
382	{	520	{
383	if (revents & (POLLIN \| POLLERR))	521	if (revents & EV_READ)
384	{	522	{
385	vpn_packet *pkt = new vpn_packet;	523	vpn_packet *pkt = new vpn_packet;
386	struct sockaddr_in sa;	524	struct sockaddr_in sa;
387	socklen_t sa_len = sizeof (sa);	525	socklen_t sa_len = sizeof (sa);
388	int len;	526	int len;
…		…
393		531
394	if (len > 0)	532	if (len > 0)
395	{	533	{
396	pkt->len = len;	534	pkt->len = len;
397		535
398	// raw sockets deliver the ipv4, but don't expect it on sends	536	// raw sockets deliver the ipv4 header, but don't expect it on sends
399	// this is slow, but...
400	pkt->skip_hdr (IP_OVERHEAD);	537	pkt->skip_hdr (IP_OVERHEAD);
401		538
402	recv_vpn_packet (pkt, si);	539	recv_vpn_packet (pkt, si);
403	}	540	}
404	else	541	else
…		…
407	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	544	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
408	}	545	}
409		546
410	delete pkt;	547	delete pkt;
411	}	548	}
412	else if (revents & POLLHUP)
413	{
414	// this cannot ;) happen on udp sockets
415	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
416	exit (1);
417	}
418	else	549	else
419	{	550	{
420	slog (L_ERR,	551	slog (L_ERR,
421	_("FATAL: unknown revents %08x in socket, terminating\n"),	552	_("FATAL: unknown revents %08x in socket, terminating\n"),
422	revents);	553	revents);
423	exit (1);	554	exit (EXIT_FAILURE);
424	}	555	}
425	}	556	}
426		557
427	#if ENABLE_ICMP	558	#if ENABLE_ICMP
428	void	559	inline void
429	vpn::icmpv4_ev (io_watcher &w, short revents)	560	vpn::icmpv4_ev (ev::io &w, int revents)
430	{	561	{
431	if (revents & (POLLIN \| POLLERR))	562	if (revents & EV_READ)
432	{	563	{
433	vpn_packet *pkt = new vpn_packet;	564	vpn_packet *pkt = new vpn_packet;
434	struct sockaddr_in sa;	565	struct sockaddr_in sa;
435	socklen_t sa_len = sizeof (sa);	566	socklen_t sa_len = sizeof (sa);
436	int len;	567	int len;
…		…
461	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	592	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
462	}	593	}
463		594
464	delete pkt;	595	delete pkt;
465	}	596	}
466	else if (revents & POLLHUP)
467	{
468	// this cannot ;) happen on udp sockets
469	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
470	exit (1);
471	}
472	else	597	else
473	{	598	{
474	slog (L_ERR,	599	slog (L_ERR,
475	_("FATAL: unknown revents %08x in socket, terminating\n"),	600	_("FATAL: unknown revents %08x in socket, terminating\n"),
476	revents);	601	revents);
477	exit (1);	602	exit (EXIT_FAILURE);
478	}	603	}
479	}	604	}
480	#endif	605	#endif
481		606
482	void	607	inline void
483	vpn::udpv4_ev (io_watcher &w, short revents)	608	vpn::udpv4_ev (ev::io &w, int revents)
484	{	609	{
485	if (revents & (POLLIN \| POLLERR))	610	if (revents & EV_READ)
486	{	611	{
487	vpn_packet *pkt = new vpn_packet;	612	vpn_packet *pkt = new vpn_packet;
488	struct sockaddr_in sa;	613	struct sockaddr_in sa;
489	socklen_t sa_len = sizeof (sa);	614	socklen_t sa_len = sizeof (sa);
490	int len;	615	int len;
…		…
505	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	630	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
506	}	631	}
507		632
508	delete pkt;	633	delete pkt;
509	}	634	}
510	else if (revents & POLLHUP)
511	{
512	// this cannot ;) happen on udp sockets
513	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
514	exit (1);
515	}
516	else	635	else
517	{	636	{
518	slog (L_ERR,	637	slog (L_ERR,
519	_("FATAL: unknown revents %08x in socket, terminating\n"),	638	_("FATAL: unknown revents %08x in socket, terminating\n"),
520	revents);	639	revents);
521	exit (1);	640	exit (EXIT_FAILURE);
522	}	641	}
523	}	642	}
524		643
525	void	644	inline void
526	vpn::tap_ev (io_watcher &w, short revents)	645	vpn::tap_ev (ev::io &w, int revents)
527	{	646	{
528	if (revents & POLLIN)	647	if (revents & EV_READ)
529	{	648	{
530	/* process data */	649	/* process data */
531	tap_packet *pkt;	650	tap_packet *pkt;
532		651
533	pkt = tap->recv ();	652	pkt = tap->recv ();
534		653
		654	if (!pkt)
		655	return;
		656
		657	if (pkt->len > 14)
		658	{
535	int dst = mac2id (pkt->dst);	659	int dst = mac2id (pkt->dst);
536	int src = mac2id (pkt->src);	660	int src = mac2id (pkt->src);
537		661
538	if (src != THISNODE->id)	662	if (src != THISNODE->id)
539	{
540	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));
541	exit (1);
542	}
543
544	if (dst == THISNODE->id)
545	{
546	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
547	exit (1);
548	}
549
550	if (dst > conns.size ())
551	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
552	else
553	{
554	if (dst)
555	{	663	{
556	// unicast	664	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
557	if (dst != THISNODE->id)	665	exit (EXIT_FAILURE);
558	conns[dst - 1]->inject_data_packet (pkt);
559	}	666	}
		667
		668	if (dst == THISNODE->id)
		669	{
		670	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		671	exit (EXIT_FAILURE);
		672	}
		673
		674	if (dst > conns.size ())
		675	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
560	else	676	else
561	{
562	// broadcast, this is ugly, but due to the security policy
563	// we have to connect to all hosts...
564	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
565	if ((*c)->conf != THISNODE)
566	(*c)->inject_data_packet (pkt);	677	inject_data_packet (pkt, dst);
567	}
568	}	678	}
569		679
570	delete pkt;	680	delete pkt;
571	}
572	else if (revents & (POLLHUP \| POLLERR))
573	{
574	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
575	exit (1);
576	}	681	}
577	else	682	else
578	abort ();	683	abort ();
579	}	684	}
580		685
581	void	686	inline void
582	vpn::event_cb (time_watcher &w)	687	vpn::event_cb (ev::timer &w, int)
583	{	688	{
584	if (events)	689	if (events)
585	{	690	{
586	if (events & EVENT_SHUTDOWN)	691	if (events & EVENT_SHUTDOWN)
587	{	692	{
588	slog (L_INFO, _("preparing shutdown..."));	693	slog (L_INFO, _("preparing shutdown..."));
589		694
590	shutdown_all ();	695	shutdown_all ();
591
592	remove_pid (pidfilename);	696	remove_pid (conf.pidfilename);
593
594	slog (L_INFO, _("terminating"));	697	slog (L_INFO, _("terminating"));
595		698	exit (EXIT_SUCCESS);
596	exit (0);
597	}	699	}
598		700
599	if (events & EVENT_RECONNECT)	701	if (events & EVENT_RECONNECT)
600	{	702	{
601	slog (L_INFO, _("forced reconnect"));	703	slog (L_INFO, _("forced reconnect"));
…		…
603	reconnect_all ();	705	reconnect_all ();
604	}	706	}
605		707
606	events = 0;	708	events = 0;
607	}	709	}
608
609	w.at = TSTAMP_CANCEL;
610	}	710	}
611		711
612	void	712	void
613	vpn::shutdown_all ()	713	vpn::shutdown_all ()
614	{	714	{
…		…
627	connection_init ();	727	connection_init ();
628		728
629	for (configuration::node_vector::iterator i = conf.nodes.begin ();	729	for (configuration::node_vector::iterator i = conf.nodes.begin ();
630	i != conf.nodes.end (); ++i)	730	i != conf.nodes.end (); ++i)
631	{	731	{
632	connection *conn = new connection (this);	732	connection conn = new connection (this, i);
633
634	conn->conf = *i;
635	conns.push_back (conn);	733	conns.push_back (conn);
636
637	conn->establish_connection ();	734	conn->establish_connection ();
638	}	735	}
639	}	736	}
640		737
641	connection *vpn::find_router ()	738	connection *vpn::find_router ()
…		…
679	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);	776	slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id);
680	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),	777	slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"),
681	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);	778	connectmode, conf->connectmode, (const char *)si, (int)prot_minor);
682	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),	779	slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"),
683	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);	780	(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt);
684	slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"),
685	(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at));
686	}	781	}
687		782
688	void	783	void
689	vpn::dump_status ()	784	vpn::dump_status ()
690	{	785	{
691	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	786	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
692		787
693	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	788	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
694	(*c)->dump_status ();	789	(*c)->dump_status ();
695		790
696	slog (L_NOTICE, _("END status dump"));	791	slog (L_NOTICE, _("END status dump"));
697	}	792	}
698		793
699	vpn::vpn (void)	794	vpn::vpn (void)
		795	{
700	: event (this, &vpn::event_cb)	796	event .set<vpn, &vpn::event_cb > (this);
701	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	797	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
702	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	798	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
703	#if ENABLE_TCP	799	#if ENABLE_TCP
704	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	800	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
705	#endif	801	#endif
706	#if ENABLE_ICMP	802	#if ENABLE_ICMP
707	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	803	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
708	#endif	804	#endif
709	, tap_ev_watcher (this, &vpn::tap_ev)	805	#if ENABLE_DNS
710	{	806	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		807	#endif
		808	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
711	}	809	}
712		810
713	vpn::~vpn ()	811	vpn::~vpn ()
714	{	812	{
715	}	813	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.15 by pcg, Tue Oct 14 15:48:15 2003 UTC vs. Revision 1.48 by pcg, Sat Aug 9 18:30:55 2008 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.15 by pcg, Tue Oct 14 15:48:15 2003 UTC vs.
Revision 1.48 by pcg, Sat Aug 9 18:30:55 2008 UTC