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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs.
Revision 1.47 by pcg, Thu Aug 7 17:54:27 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 Marc Lehmann <pcg@goof.com>	3	Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
4		4
		5	This file is part of GVPE.
		6
5	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
6	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
7	the Free Software Foundation; either version 2 of the License, or	9	Free Software Foundation; either version 3 of the License, or (at your
8	(at your option) any later version.	10	option) any later version.
9		11
10	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
11	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13	GNU General Public License for more details.	15	Public License for more details.
14		16
15	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
16	along with this program; if not, write to the Free Software	18	with this program; if not, see <http://www.gnu.org/licenses/>.
17	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.
18	*/	30	*/
19		31
20	#include "config.h"	32	#include "config.h"
21		33
22	#include <list>	34	#include <list>
23		35
		36	#include <cstdio>
		37	#include <cstring>
24	#include <cstdlib>	38	#include <cstdlib>
25	#include <cstring>
26	#include <cstdio>
27		39
28	#include <sys/types.h>	40	#include <sys/types.h>
29	#include <sys/socket.h>	41	#include <sys/socket.h>
30	#include <sys/wait.h>	42	#include <sys/wait.h>
31	#include <errno.h>	43	#include <errno.h>
44		56
45	vpn network; // THE vpn (bad design...)	57	vpn network; // THE vpn (bad design...)
46		58
47	/////////////////////////////////////////////////////////////////////////////	59	/////////////////////////////////////////////////////////////////////////////
48		60
49	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 ()
50	{	75	{
51	// the tunnel device mtu should be the physical mtu - overhead	76	// the tunnel device mtu should be the physical mtu - overhead
52	// the tricky part is rounding to the cipher key blocksize	77	// the tricky part is rounding to the cipher key blocksize
53	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	78	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
54	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	79	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
55	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	80	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
56	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	81	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
57		82
58	char *env;	83	char *env;
59	asprintf (&env, "CONFBASE=%s", confbase);	84	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
60	putenv (env);
61	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
62	putenv (env);
63	asprintf (&env, "NODEID=%d", THISNODE->id);
64	putenv (env);
65	asprintf (&env, "IFNAME=%s", tap->interface ());	85	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
66	putenv (env);	86	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		87	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
67	asprintf (&env, "MTU=%d", mtu);	88	asprintf (&env, "MTU=%d", mtu); putenv (env);
68	putenv (env);	89	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
69	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	90	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
70	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
71	THISNODE->id & 0xff);
72	putenv (env);
73		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,
74	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;
75	}	122	}
76		123
77	int	124	int
78	vpn::setup ()	125	vpn::setup ()
79	{	126	{
		127	ipv4_tos = -1;
80	ipv4_fd = -1;	128	ipv4_fd = -1;
81		129
82	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	130	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
83	{	131	{
84	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	132	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
85		133
86	if (ipv4_fd < 0)	134	if (ipv4_fd < 0)
87	return -1;	135	return -1;
88		136
89	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	137	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		138	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
90		139
91	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	140	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
92	// this I really consider a linux bug. I am neither connected	141	// this I really consider a linux bug. I am neither connected
93	// 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
94	// fragment for me sometimes.	143	// fragment for me sometimes.
…		…
101	sockinfo si (THISNODE, PROT_IPv4);	150	sockinfo si (THISNODE, PROT_IPv4);
102		151
103	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	152	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
104	{	153	{
105	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));
106	exit (1);	155	exit (EXIT_FAILURE);
107	}	156	}
108		157
109	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	158	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
110	}	159	}
111		160
		161	udpv4_tos = -1;
112	udpv4_fd = -1;	162	udpv4_fd = -1;
113		163
114	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	164	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
115	{	165	{
116	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	166	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
117		167
118	if (udpv4_fd < 0)	168	if (udpv4_fd < 0)
119	return -1;	169	return -1;
120		170
121	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	171	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		172	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
122		173
123	// standard daemon practise...	174	// standard daemon practise...
124	{	175	{
125	int oval = 1;	176	int oval = 1;
126	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	177	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
139	sockinfo si (THISNODE, PROT_UDPv4);	190	sockinfo si (THISNODE, PROT_UDPv4);
140		191
141	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	192	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
142	{	193	{
143	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));
144	exit (1);	195	exit (EXIT_FAILURE);
145	}	196	}
146		197
147	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	198	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
148	}	199	}
149		200
		201	icmpv4_tos = -1;
150	icmpv4_fd = -1;	202	icmpv4_fd = -1;
151		203
152	#if ENABLE_ICMP	204	#if ENABLE_ICMP
153	if (THISNODE->protocols & PROT_ICMPv4)	205	if (THISNODE->protocols & PROT_ICMPv4)
154	{	206	{
155	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	207	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
156		208
157	if (icmpv4_fd < 0)	209	if (icmpv4_fd < 0)
158	return -1;	210	return -1;
159		211
160	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	212	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		213	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
161		214
162	#ifdef ICMP_FILTER	215	#ifdef ICMP_FILTER
163	{	216	{
164	icmp_filter oval;	217	icmp_filter oval;
165	oval.data = 0xffffffff;	218	oval.data = 0xffffffff;
…		…
174	// this I really consider a linux bug. I am neither connected	227	// this I really consider a linux bug. I am neither connected
175	// 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
176	// fragment for me sometimes.	229	// fragment for me sometimes.
177	{	230	{
178	int oval = IP_PMTUDISC_DONT;	231	int oval = IP_PMTUDISC_DONT;
179	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	232	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
180	}	233	}
181	#endif	234	#endif
182		235
183	sockinfo si (THISNODE, PROT_ICMPv4);	236	sockinfo si (THISNODE, PROT_ICMPv4);
184		237
185	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	238	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
186	{	239	{
187	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));
188	exit (1);	241	exit (EXIT_FAILURE);
189	}	242	}
190		243
191	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	244	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
192	}	245	}
193	#endif	246	#endif
194		247
195	tcpv4_fd = -1;	248	tcpv4_fd = -1;
196		249
…		…
201		254
202	if (tcpv4_fd < 0)	255	if (tcpv4_fd < 0)
203	return -1;	256	return -1;
204		257
205	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	258	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		259	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
206		260
207	// standard daemon practise...	261	// standard daemon practise...
208	{	262	{
209	int oval = 1;	263	int oval = 1;
210	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	264	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
213	sockinfo si (THISNODE, PROT_TCPv4);	267	sockinfo si (THISNODE, PROT_TCPv4);
214		268
215	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	269	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
216	{	270	{
217	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));
218	exit (1);	272	exit (EXIT_FAILURE);
219	}	273	}
220		274
221	if (listen (tcpv4_fd, 5))	275	if (listen (tcpv4_fd, 5))
222	{	276	{
223	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));
224	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);
225	}	308	}
226
227	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
228	}
229	#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	/////////////////////////////////////////////////////////////////////////////
230		336
231	tap = new tap_device ();	337	tap = new tap_device ();
232	if (!tap) //D this, of course, never catches	338	if (!tap) //D this, of course, never catches
233	{	339	{
234	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	340	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
235	exit (1);	341	exit (EXIT_FAILURE);
236	}	342	}
237		343
238	run_script (run_script_cb (this, &vpn::script_if_up), true);	344	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
239		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
240	tap_ev_watcher.start (tap->fd, POLLIN);	364	tap_ev_watcher.start (tap->fd, EV_READ);
241
242	reconnect_all ();
243		365
244	return 0;	366	return 0;
245	}
246
247	// send a vpn packet out to other hosts
248	bool
249	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
250	{
251	switch (si.prot)
252	{
253	case PROT_IPv4:
254	return send_ipv4_packet (pkt, si, tos);
255
256	case PROT_UDPv4:
257	return send_udpv4_packet (pkt, si, tos);
258
259	#if ENABLE_TCP
260	case PROT_TCPv4:
261	return send_tcpv4_packet (pkt, si, tos);
262	#endif
263
264	#if ENABLE_ICMP
265	case PROT_ICMPv4:
266	return send_icmpv4_packet (pkt, si, tos);
267	#endif
268
269	default:
270	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
271	return false;
272	}
273	}	367	}
274		368
275	bool	369	bool
276	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)
277	{	371	{
278	#if defined(SOL_IP) && defined(IP_TOS)	372	set_tos (ipv4_fd, ipv4_tos, tos);
279	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
280	#endif
281	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 ());
282		374
283	return true;	375	return true;
284	}	376	}
285		377
…		…
308		400
309	#if ENABLE_ICMP	401	#if ENABLE_ICMP
310	bool	402	bool
311	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)
312	{	404	{
313	#if defined(SOL_IP) && defined(IP_TOS)
314	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
315	#endif
316
317	pkt->unshift_hdr (4);	405	pkt->unshift_hdr (4);
318		406
319	icmp_header hdr = (icmp_header )&((*pkt)[0]);	407	icmp_header hdr = (icmp_header )&((*pkt)[0]);
320	hdr->type = ::conf.icmp_type;	408	hdr->type = ::conf.icmp_type;
321	hdr->code = 255;	409	hdr->code = 255;
322	hdr->checksum = 0;	410	hdr->checksum = 0;
323	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	411	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
324		412
		413	set_tos (icmpv4_fd, icmpv4_tos, tos);
325	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 ());
326		415
327	return true;	416	return true;
328	}	417	}
329	#endif	418	#endif
330		419
331	bool	420	bool
332	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)
333	{	422	{
334	#if defined(SOL_IP) && defined(IP_TOS)	423	set_tos (udpv4_fd, udpv4_tos, tos);
335	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
336	#endif
337	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 ());
338		425
339	return true;	426	return true;
340	}	427	}
341		428
…		…
352	{	439	{
353	// broadcast, this is ugly, but due to the security policy	440	// broadcast, this is ugly, but due to the security policy
354	// we have to connect to all hosts...	441	// we have to connect to all hosts...
355	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	442	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
356	if ((*c)->conf != THISNODE)	443	if ((*c)->conf != THISNODE)
357	(*c)->inject_data_packet (pkt, true);	444	(*c)->inject_data_packet (pkt);
358	}	445	}
359	}	446	}
360		447
361	void	448	void
362	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	449	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
…		…
396	else	483	else
397	c->recv_vpn_packet (pkt, rsi);	484	c->recv_vpn_packet (pkt, rsi);
398	}	485	}
399	}	486	}
400		487
401	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
402	vpn::ipv4_ev (io_watcher &w, short revents)	519	vpn::ipv4_ev (ev::io &w, int revents)
403	{	520	{
404	if (revents & (POLLIN \| POLLERR))	521	if (revents & EV_READ)
405	{	522	{
406	vpn_packet *pkt = new vpn_packet;	523	vpn_packet *pkt = new vpn_packet;
407	struct sockaddr_in sa;	524	struct sockaddr_in sa;
408	socklen_t sa_len = sizeof (sa);	525	socklen_t sa_len = sizeof (sa);
409	int len;	526	int len;
…		…
414		531
415	if (len > 0)	532	if (len > 0)
416	{	533	{
417	pkt->len = len;	534	pkt->len = len;
418		535
419	// 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
420	// this is slow, but...
421	pkt->skip_hdr (IP_OVERHEAD);	537	pkt->skip_hdr (IP_OVERHEAD);
422		538
423	recv_vpn_packet (pkt, si);	539	recv_vpn_packet (pkt, si);
424	}	540	}
425	else	541	else
…		…
428	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	544	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
429	}	545	}
430		546
431	delete pkt;	547	delete pkt;
432	}	548	}
433	else if (revents & POLLHUP)
434	{
435	// this cannot ;) happen on udp sockets
436	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
437	exit (1);
438	}
439	else	549	else
440	{	550	{
441	slog (L_ERR,	551	slog (L_ERR,
442	_("FATAL: unknown revents %08x in socket, terminating\n"),	552	_("FATAL: unknown revents %08x in socket, terminating\n"),
443	revents);	553	revents);
444	exit (1);	554	exit (EXIT_FAILURE);
445	}	555	}
446	}	556	}
447		557
448	#if ENABLE_ICMP	558	#if ENABLE_ICMP
449	void	559	inline void
450	vpn::icmpv4_ev (io_watcher &w, short revents)	560	vpn::icmpv4_ev (ev::io &w, int revents)
451	{	561	{
452	if (revents & (POLLIN \| POLLERR))	562	if (revents & EV_READ)
453	{	563	{
454	vpn_packet *pkt = new vpn_packet;	564	vpn_packet *pkt = new vpn_packet;
455	struct sockaddr_in sa;	565	struct sockaddr_in sa;
456	socklen_t sa_len = sizeof (sa);	566	socklen_t sa_len = sizeof (sa);
457	int len;	567	int len;
…		…
482	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	592	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
483	}	593	}
484		594
485	delete pkt;	595	delete pkt;
486	}	596	}
487	else if (revents & POLLHUP)
488	{
489	// this cannot ;) happen on udp sockets
490	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
491	exit (1);
492	}
493	else	597	else
494	{	598	{
495	slog (L_ERR,	599	slog (L_ERR,
496	_("FATAL: unknown revents %08x in socket, terminating\n"),	600	_("FATAL: unknown revents %08x in socket, terminating\n"),
497	revents);	601	revents);
498	exit (1);	602	exit (EXIT_FAILURE);
499	}	603	}
500	}	604	}
501	#endif	605	#endif
502		606
503	void	607	inline void
504	vpn::udpv4_ev (io_watcher &w, short revents)	608	vpn::udpv4_ev (ev::io &w, int revents)
505	{	609	{
506	if (revents & (POLLIN \| POLLERR))	610	if (revents & EV_READ)
507	{	611	{
508	vpn_packet *pkt = new vpn_packet;	612	vpn_packet *pkt = new vpn_packet;
509	struct sockaddr_in sa;	613	struct sockaddr_in sa;
510	socklen_t sa_len = sizeof (sa);	614	socklen_t sa_len = sizeof (sa);
511	int len;	615	int len;
…		…
526	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));
527	}	631	}
528		632
529	delete pkt;	633	delete pkt;
530	}	634	}
531	else if (revents & POLLHUP)
532	{
533	// this cannot ;) happen on udp sockets
534	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
535	exit (1);
536	}
537	else	635	else
538	{	636	{
539	slog (L_ERR,	637	slog (L_ERR,
540	_("FATAL: unknown revents %08x in socket, terminating\n"),	638	_("FATAL: unknown revents %08x in socket, terminating\n"),
541	revents);	639	revents);
542	exit (1);	640	exit (EXIT_FAILURE);
543	}	641	}
544	}	642	}
545		643
546	void	644	inline void
547	vpn::tap_ev (io_watcher &w, short revents)	645	vpn::tap_ev (ev::io &w, int revents)
548	{	646	{
549	if (revents & POLLIN)	647	if (revents & EV_READ)
550	{	648	{
551	/* process data */	649	/* process data */
552	tap_packet *pkt;	650	tap_packet *pkt;
553		651
554	pkt = tap->recv ();	652	pkt = tap->recv ();
…		…
561	int dst = mac2id (pkt->dst);	659	int dst = mac2id (pkt->dst);
562	int src = mac2id (pkt->src);	660	int src = mac2id (pkt->src);
563		661
564	if (src != THISNODE->id)	662	if (src != THISNODE->id)
565	{	663	{
566	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));	664	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
567	exit (1);	665	exit (EXIT_FAILURE);
568	}	666	}
569		667
570	if (dst == THISNODE->id)	668	if (dst == THISNODE->id)
571	{	669	{
572	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));	670	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
573	exit (1);	671	exit (EXIT_FAILURE);
574	}	672	}
575		673
576	if (dst > conns.size ())	674	if (dst > conns.size ())
577	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);	675	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
578	else	676	else
579	inject_data_packet (pkt, dst);	677	inject_data_packet (pkt, dst);
580	}	678	}
581		679
582	delete pkt;	680	delete pkt;
583	}	681	}
584	else if (revents & (POLLHUP \| POLLERR))
585	{
586	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
587	exit (1);
588	}
589	else	682	else
590	abort ();	683	abort ();
591	}	684	}
592		685
593	void	686	inline void
594	vpn::event_cb (time_watcher &w)	687	vpn::event_cb (ev::timer &w, int)
595	{	688	{
596	if (events)	689	if (events)
597	{	690	{
598	if (events & EVENT_SHUTDOWN)	691	if (events & EVENT_SHUTDOWN)
599	{	692	{
600	slog (L_INFO, _("preparing shutdown..."));	693	slog (L_INFO, _("preparing shutdown..."));
601		694
602	shutdown_all ();	695	shutdown_all ();
603
604	remove_pid (pidfilename);	696	remove_pid (conf.pidfilename);
605
606	slog (L_INFO, _("terminating"));	697	slog (L_INFO, _("terminating"));
607		698	exit (EXIT_SUCCESS);
608	exit (0);
609	}	699	}
610		700
611	if (events & EVENT_RECONNECT)	701	if (events & EVENT_RECONNECT)
612	{	702	{
613	slog (L_INFO, _("forced reconnect"));	703	slog (L_INFO, _("forced reconnect"));
…		…
615	reconnect_all ();	705	reconnect_all ();
616	}	706	}
617		707
618	events = 0;	708	events = 0;
619	}	709	}
620
621	w.at = TSTAMP_CANCEL;
622	}	710	}
623		711
624	void	712	void
625	vpn::shutdown_all ()	713	vpn::shutdown_all ()
626	{	714	{
…		…
639	connection_init ();	727	connection_init ();
640		728
641	for (configuration::node_vector::iterator i = conf.nodes.begin ();	729	for (configuration::node_vector::iterator i = conf.nodes.begin ();
642	i != conf.nodes.end (); ++i)	730	i != conf.nodes.end (); ++i)
643	{	731	{
644	connection *conn = new connection (this);	732	connection conn = new connection (this, i);
645
646	conn->conf = *i;
647	conns.push_back (conn);	733	conns.push_back (conn);
648
649	conn->establish_connection ();	734	conn->establish_connection ();
650	}	735	}
651	}	736	}
652		737
653	connection *vpn::find_router ()	738	connection *vpn::find_router ()
…		…
698	}	783	}
699		784
700	void	785	void
701	vpn::dump_status ()	786	vpn::dump_status ()
702	{	787	{
703	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	788	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
704		789
705	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	790	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
706	(*c)->dump_status ();	791	(*c)->dump_status ();
707		792
708	slog (L_NOTICE, _("END status dump"));	793	slog (L_NOTICE, _("END status dump"));
709	}	794	}
710		795
711	vpn::vpn (void)	796	vpn::vpn (void)
		797	{
712	: event (this, &vpn::event_cb)	798	event .set<vpn, &vpn::event_cb > (this);
713	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	799	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
714	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	800	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
715	#if ENABLE_TCP	801	#if ENABLE_TCP
716	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	802	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
717	#endif	803	#endif
718	#if ENABLE_ICMP	804	#if ENABLE_ICMP
719	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	805	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
720	#endif	806	#endif
721	, tap_ev_watcher (this, &vpn::tap_ev)	807	#if ENABLE_DNS
722	{	808	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		809	#endif
		810	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
723	}	811	}
724		812
725	vpn::~vpn ()	813	vpn::~vpn ()
726	{	814	{
727	}	815	}

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing gvpe/src/vpn.C (file contents): Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs. Revision 1.47 by pcg, Thu Aug 7 17:54:27 2008 UTC

Diff Legend

Comparing gvpe/src/vpn.C (file contents):
Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs.
Revision 1.47 by pcg, Thu Aug 7 17:54:27 2008 UTC