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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.21 by pcg, Thu Oct 16 21:57:54 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); putenv (env);	84	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
60	asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env);
61	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
62	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);	85	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
63	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);	86	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
64	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);	87	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
65	asprintf (&env, "MTU=%d", mtu); putenv (env);	88	asprintf (&env, "MTU=%d", mtu); putenv (env);
66	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	89	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
67	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,	90	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
68	THISNODE->id & 0xff);
69	putenv (env);
70		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,
71	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;
72	}	122	}
73		123
74	int	124	int
75	vpn::setup ()	125	vpn::setup ()
76	{	126	{
		127	ipv4_tos = -1;
77	ipv4_fd = -1;	128	ipv4_fd = -1;
78		129
79	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	130	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
80	{	131	{
81	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	132	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
82		133
83	if (ipv4_fd < 0)	134	if (ipv4_fd < 0)
84	return -1;	135	return -1;
85		136
86	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	137	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		138	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
87		139
88	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	140	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
89	// this I really consider a linux bug. I am neither connected	141	// this I really consider a linux bug. I am neither connected
90	// 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
91	// fragment for me sometimes.	143	// fragment for me sometimes.
…		…
98	sockinfo si (THISNODE, PROT_IPv4);	150	sockinfo si (THISNODE, PROT_IPv4);
99		151
100	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	152	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
101	{	153	{
102	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));
103	exit (1);	155	exit (EXIT_FAILURE);
104	}	156	}
105		157
106	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	158	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
107	}	159	}
108		160
		161	udpv4_tos = -1;
109	udpv4_fd = -1;	162	udpv4_fd = -1;
110		163
111	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	164	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
112	{	165	{
113	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	166	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
114		167
115	if (udpv4_fd < 0)	168	if (udpv4_fd < 0)
116	return -1;	169	return -1;
117		170
118	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	171	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		172	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
119		173
120	// standard daemon practise...	174	// standard daemon practise...
121	{	175	{
122	int oval = 1;	176	int oval = 1;
123	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	177	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
136	sockinfo si (THISNODE, PROT_UDPv4);	190	sockinfo si (THISNODE, PROT_UDPv4);
137		191
138	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	192	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
139	{	193	{
140	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));
141	exit (1);	195	exit (EXIT_FAILURE);
142	}	196	}
143		197
144	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	198	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
145	}	199	}
146		200
		201	icmpv4_tos = -1;
147	icmpv4_fd = -1;	202	icmpv4_fd = -1;
148		203
149	#if ENABLE_ICMP	204	#if ENABLE_ICMP
150	if (THISNODE->protocols & PROT_ICMPv4)	205	if (THISNODE->protocols & PROT_ICMPv4)
151	{	206	{
152	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	207	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
153		208
154	if (icmpv4_fd < 0)	209	if (icmpv4_fd < 0)
155	return -1;	210	return -1;
156		211
157	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	212	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		213	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
158		214
159	#ifdef ICMP_FILTER	215	#ifdef ICMP_FILTER
160	{	216	{
161	icmp_filter oval;	217	icmp_filter oval;
162	oval.data = 0xffffffff;	218	oval.data = 0xffffffff;
…		…
171	// this I really consider a linux bug. I am neither connected	227	// this I really consider a linux bug. I am neither connected
172	// 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
173	// fragment for me sometimes.	229	// fragment for me sometimes.
174	{	230	{
175	int oval = IP_PMTUDISC_DONT;	231	int oval = IP_PMTUDISC_DONT;
176	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	232	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
177	}	233	}
178	#endif	234	#endif
179		235
180	sockinfo si (THISNODE, PROT_ICMPv4);	236	sockinfo si (THISNODE, PROT_ICMPv4);
181		237
182	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	238	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
183	{	239	{
184	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));
185	exit (1);	241	exit (EXIT_FAILURE);
186	}	242	}
187		243
188	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	244	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
189	}	245	}
190	#endif	246	#endif
191		247
192	tcpv4_fd = -1;	248	tcpv4_fd = -1;
193		249
…		…
198		254
199	if (tcpv4_fd < 0)	255	if (tcpv4_fd < 0)
200	return -1;	256	return -1;
201		257
202	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	258	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		259	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
203		260
204	// standard daemon practise...	261	// standard daemon practise...
205	{	262	{
206	int oval = 1;	263	int oval = 1;
207	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	264	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
210	sockinfo si (THISNODE, PROT_TCPv4);	267	sockinfo si (THISNODE, PROT_TCPv4);
211		268
212	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	269	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
213	{	270	{
214	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));
215	exit (1);	272	exit (EXIT_FAILURE);
216	}	273	}
217		274
218	if (listen (tcpv4_fd, 5))	275	if (listen (tcpv4_fd, 5))
219	{	276	{
220	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));
221	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);
222	}	308	}
223
224	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
225	}
226	#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	/////////////////////////////////////////////////////////////////////////////
227		336
228	tap = new tap_device ();	337	tap = new tap_device ();
229	if (!tap) //D this, of course, never catches	338	if (!tap) //D this, of course, never catches
230	{	339	{
231	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	340	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
232	exit (1);	341	exit (EXIT_FAILURE);
233	}	342	}
234		343
235	run_script (run_script_cb (this, &vpn::script_if_up), true);	344	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
236		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
237	tap_ev_watcher.start (tap->fd, POLLIN);	364	tap_ev_watcher.start (tap->fd, EV_READ);
238
239	reconnect_all ();
240		365
241	return 0;	366	return 0;
242	}
243
244	// send a vpn packet out to other hosts
245	bool
246	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
247	{
248	switch (si.prot)
249	{
250	case PROT_IPv4:
251	return send_ipv4_packet (pkt, si, tos);
252
253	case PROT_UDPv4:
254	return send_udpv4_packet (pkt, si, tos);
255
256	#if ENABLE_TCP
257	case PROT_TCPv4:
258	return send_tcpv4_packet (pkt, si, tos);
259	#endif
260
261	#if ENABLE_ICMP
262	case PROT_ICMPv4:
263	return send_icmpv4_packet (pkt, si, tos);
264	#endif
265
266	default:
267	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
268	return false;
269	}
270	}	367	}
271		368
272	bool	369	bool
273	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)
274	{	371	{
275	#if defined(SOL_IP) && defined(IP_TOS)	372	set_tos (ipv4_fd, ipv4_tos, tos);
276	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
277	#endif
278	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 ());
279		374
280	return true;	375	return true;
281	}	376	}
282		377
…		…
305		400
306	#if ENABLE_ICMP	401	#if ENABLE_ICMP
307	bool	402	bool
308	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)
309	{	404	{
310	#if defined(SOL_IP) && defined(IP_TOS)
311	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
312	#endif
313
314	pkt->unshift_hdr (4);	405	pkt->unshift_hdr (4);
315		406
316	icmp_header hdr = (icmp_header )&((*pkt)[0]);	407	icmp_header hdr = (icmp_header )&((*pkt)[0]);
317	hdr->type = ::conf.icmp_type;	408	hdr->type = ::conf.icmp_type;
318	hdr->code = 255;	409	hdr->code = 255;
319	hdr->checksum = 0;	410	hdr->checksum = 0;
320	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	411	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
321		412
		413	set_tos (icmpv4_fd, icmpv4_tos, tos);
322	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 ());
323		415
324	return true;	416	return true;
325	}	417	}
326	#endif	418	#endif
327		419
328	bool	420	bool
329	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)
330	{	422	{
331	#if defined(SOL_IP) && defined(IP_TOS)	423	set_tos (udpv4_fd, udpv4_tos, tos);
332	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
333	#endif
334	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 ());
335		425
336	return true;	426	return true;
337	}	427	}
338		428
…		…
349	{	439	{
350	// broadcast, this is ugly, but due to the security policy	440	// broadcast, this is ugly, but due to the security policy
351	// we have to connect to all hosts...	441	// we have to connect to all hosts...
352	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	442	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
353	if ((*c)->conf != THISNODE)	443	if ((*c)->conf != THISNODE)
354	(*c)->inject_data_packet (pkt, true);	444	(*c)->inject_data_packet (pkt);
355	}	445	}
356	}	446	}
357		447
358	void	448	void
359	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	449	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
…		…
393	else	483	else
394	c->recv_vpn_packet (pkt, rsi);	484	c->recv_vpn_packet (pkt, rsi);
395	}	485	}
396	}	486	}
397		487
398	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
399	vpn::ipv4_ev (io_watcher &w, short revents)	519	vpn::ipv4_ev (ev::io &w, int revents)
400	{	520	{
401	if (revents & (POLLIN \| POLLERR))	521	if (revents & EV_READ)
402	{	522	{
403	vpn_packet *pkt = new vpn_packet;	523	vpn_packet *pkt = new vpn_packet;
404	struct sockaddr_in sa;	524	struct sockaddr_in sa;
405	socklen_t sa_len = sizeof (sa);	525	socklen_t sa_len = sizeof (sa);
406	int len;	526	int len;
…		…
411		531
412	if (len > 0)	532	if (len > 0)
413	{	533	{
414	pkt->len = len;	534	pkt->len = len;
415		535
416	// 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
417	// this is slow, but...
418	pkt->skip_hdr (IP_OVERHEAD);	537	pkt->skip_hdr (IP_OVERHEAD);
419		538
420	recv_vpn_packet (pkt, si);	539	recv_vpn_packet (pkt, si);
421	}	540	}
422	else	541	else
…		…
425	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	544	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
426	}	545	}
427		546
428	delete pkt;	547	delete pkt;
429	}	548	}
430	else if (revents & POLLHUP)
431	{
432	// this cannot ;) happen on udp sockets
433	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
434	exit (1);
435	}
436	else	549	else
437	{	550	{
438	slog (L_ERR,	551	slog (L_ERR,
439	_("FATAL: unknown revents %08x in socket, terminating\n"),	552	_("FATAL: unknown revents %08x in socket, terminating\n"),
440	revents);	553	revents);
441	exit (1);	554	exit (EXIT_FAILURE);
442	}	555	}
443	}	556	}
444		557
445	#if ENABLE_ICMP	558	#if ENABLE_ICMP
446	void	559	inline void
447	vpn::icmpv4_ev (io_watcher &w, short revents)	560	vpn::icmpv4_ev (ev::io &w, int revents)
448	{	561	{
449	if (revents & (POLLIN \| POLLERR))	562	if (revents & EV_READ)
450	{	563	{
451	vpn_packet *pkt = new vpn_packet;	564	vpn_packet *pkt = new vpn_packet;
452	struct sockaddr_in sa;	565	struct sockaddr_in sa;
453	socklen_t sa_len = sizeof (sa);	566	socklen_t sa_len = sizeof (sa);
454	int len;	567	int len;
…		…
479	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	592	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
480	}	593	}
481		594
482	delete pkt;	595	delete pkt;
483	}	596	}
484	else if (revents & POLLHUP)
485	{
486	// this cannot ;) happen on udp sockets
487	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
488	exit (1);
489	}
490	else	597	else
491	{	598	{
492	slog (L_ERR,	599	slog (L_ERR,
493	_("FATAL: unknown revents %08x in socket, terminating\n"),	600	_("FATAL: unknown revents %08x in socket, terminating\n"),
494	revents);	601	revents);
495	exit (1);	602	exit (EXIT_FAILURE);
496	}	603	}
497	}	604	}
498	#endif	605	#endif
499		606
500	void	607	inline void
501	vpn::udpv4_ev (io_watcher &w, short revents)	608	vpn::udpv4_ev (ev::io &w, int revents)
502	{	609	{
503	if (revents & (POLLIN \| POLLERR))	610	if (revents & EV_READ)
504	{	611	{
505	vpn_packet *pkt = new vpn_packet;	612	vpn_packet *pkt = new vpn_packet;
506	struct sockaddr_in sa;	613	struct sockaddr_in sa;
507	socklen_t sa_len = sizeof (sa);	614	socklen_t sa_len = sizeof (sa);
508	int len;	615	int len;
…		…
523	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));
524	}	631	}
525		632
526	delete pkt;	633	delete pkt;
527	}	634	}
528	else if (revents & POLLHUP)
529	{
530	// this cannot ;) happen on udp sockets
531	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
532	exit (1);
533	}
534	else	635	else
535	{	636	{
536	slog (L_ERR,	637	slog (L_ERR,
537	_("FATAL: unknown revents %08x in socket, terminating\n"),	638	_("FATAL: unknown revents %08x in socket, terminating\n"),
538	revents);	639	revents);
539	exit (1);	640	exit (EXIT_FAILURE);
540	}	641	}
541	}	642	}
542		643
543	void	644	inline void
544	vpn::tap_ev (io_watcher &w, short revents)	645	vpn::tap_ev (ev::io &w, int revents)
545	{	646	{
546	if (revents & POLLIN)	647	if (revents & EV_READ)
547	{	648	{
548	/* process data */	649	/* process data */
549	tap_packet *pkt;	650	tap_packet *pkt;
550		651
551	pkt = tap->recv ();	652	pkt = tap->recv ();
…		…
558	int dst = mac2id (pkt->dst);	659	int dst = mac2id (pkt->dst);
559	int src = mac2id (pkt->src);	660	int src = mac2id (pkt->src);
560		661
561	if (src != THISNODE->id)	662	if (src != THISNODE->id)
562	{	663	{
563	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."));
564	exit (1);	665	exit (EXIT_FAILURE);
565	}	666	}
566		667
567	if (dst == THISNODE->id)	668	if (dst == THISNODE->id)
568	{	669	{
569	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."));
570	exit (1);	671	exit (EXIT_FAILURE);
571	}	672	}
572		673
573	if (dst > conns.size ())	674	if (dst > conns.size ())
574	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);
575	else	676	else
576	inject_data_packet (pkt, dst);	677	inject_data_packet (pkt, dst);
577	}	678	}
578		679
579	delete pkt;	680	delete pkt;
580	}	681	}
581	else if (revents & (POLLHUP \| POLLERR))
582	{
583	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
584	exit (1);
585	}
586	else	682	else
587	abort ();	683	abort ();
588	}	684	}
589		685
590	void	686	inline void
591	vpn::event_cb (time_watcher &w)	687	vpn::event_cb (ev::timer &w, int)
592	{	688	{
593	if (events)	689	if (events)
594	{	690	{
595	if (events & EVENT_SHUTDOWN)	691	if (events & EVENT_SHUTDOWN)
596	{	692	{
597	slog (L_INFO, _("preparing shutdown..."));	693	slog (L_INFO, _("preparing shutdown..."));
598		694
599	shutdown_all ();	695	shutdown_all ();
600
601	remove_pid (pidfilename);	696	remove_pid (conf.pidfilename);
602
603	slog (L_INFO, _("terminating"));	697	slog (L_INFO, _("terminating"));
604		698	exit (EXIT_SUCCESS);
605	exit (0);
606	}	699	}
607		700
608	if (events & EVENT_RECONNECT)	701	if (events & EVENT_RECONNECT)
609	{	702	{
610	slog (L_INFO, _("forced reconnect"));	703	slog (L_INFO, _("forced reconnect"));
…		…
612	reconnect_all ();	705	reconnect_all ();
613	}	706	}
614		707
615	events = 0;	708	events = 0;
616	}	709	}
617
618	w.at = TSTAMP_CANCEL;
619	}	710	}
620		711
621	void	712	void
622	vpn::shutdown_all ()	713	vpn::shutdown_all ()
623	{	714	{
…		…
636	connection_init ();	727	connection_init ();
637		728
638	for (configuration::node_vector::iterator i = conf.nodes.begin ();	729	for (configuration::node_vector::iterator i = conf.nodes.begin ();
639	i != conf.nodes.end (); ++i)	730	i != conf.nodes.end (); ++i)
640	{	731	{
641	connection *conn = new connection (this);	732	connection conn = new connection (this, i);
642
643	conn->conf = *i;
644	conns.push_back (conn);	733	conns.push_back (conn);
645
646	conn->establish_connection ();	734	conn->establish_connection ();
647	}	735	}
648	}	736	}
649		737
650	connection *vpn::find_router ()	738	connection *vpn::find_router ()
…		…
695	}	783	}
696		784
697	void	785	void
698	vpn::dump_status ()	786	vpn::dump_status ()
699	{	787	{
700	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	788	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
701		789
702	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	790	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
703	(*c)->dump_status ();	791	(*c)->dump_status ();
704		792
705	slog (L_NOTICE, _("END status dump"));	793	slog (L_NOTICE, _("END status dump"));
706	}	794	}
707		795
708	vpn::vpn (void)	796	vpn::vpn (void)
		797	{
709	: event (this, &vpn::event_cb)	798	event .set<vpn, &vpn::event_cb > (this);
710	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	799	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
711	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	800	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
712	#if ENABLE_TCP	801	#if ENABLE_TCP
713	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	802	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
714	#endif	803	#endif
715	#if ENABLE_ICMP	804	#if ENABLE_ICMP
716	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	805	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
717	#endif	806	#endif
718	, tap_ev_watcher (this, &vpn::tap_ev)	807	#if ENABLE_DNS
719	{	808	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		809	#endif
		810	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
720	}	811	}
721		812
722	vpn::~vpn ()	813	vpn::~vpn ()
723	{	814	{
724	}	815	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.21 by pcg, Thu Oct 16 21:57:54 2003 UTC vs. Revision 1.47 by pcg, Thu Aug 7 17:54:27 2008 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.21 by pcg, Thu Oct 16 21:57:54 2003 UTC vs.
Revision 1.47 by pcg, Thu Aug 7 17:54:27 2008 UTC