[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 1.46 by pcg, Thu Aug 7 17:30:28 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) 2003-2007 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
6	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
7	the Free Software Foundation; either version 2 of the License, or	9	the Free Software Foundation; either version 2 of the License, or
8	(at your option) any later version.	10	(at your 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,
11	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	but 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
13	GNU General Public License for more details.	15	GNU General 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
16	along with this program; if not, write to the Free Software	18	along with gvpe; if not, write to the Free Software
17	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
18	*/	20	*/
19		21
20	#include "config.h"	22	#include "config.h"
21		23
22	#include <list>	24	#include <list>
23		25
		26	#include <cstdio>
		27	#include <cstring>
24	#include <cstdlib>	28	#include <cstdlib>
25	#include <cstring>
26	#include <cstdio>
27		29
28	#include <sys/types.h>	30	#include <sys/types.h>
29	#include <sys/socket.h>	31	#include <sys/socket.h>
30	#include <sys/wait.h>	32	#include <sys/wait.h>
31	#include <errno.h>	33	#include <errno.h>
44		46
45	vpn network; // THE vpn (bad design...)	47	vpn network; // THE vpn (bad design...)
46		48
47	/////////////////////////////////////////////////////////////////////////////	49	/////////////////////////////////////////////////////////////////////////////
48		50
49	const char *vpn::script_if_up ()	51	static void inline
		52	set_tos (int fd, int &tos_prev, int tos)
		53	{
		54	#if defined(SOL_IP) && defined(IP_TOS)
		55	if (tos_prev == tos)
		56	return;
		57
		58	tos_prev = tos;
		59	setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		60	#endif
		61	}
		62
		63	void
		64	vpn::script_init_env ()
50	{	65	{
51	// the tunnel device mtu should be the physical mtu - overhead	66	// the tunnel device mtu should be the physical mtu - overhead
52	// the tricky part is rounding to the cipher key blocksize	67	// the tricky part is rounding to the cipher key blocksize
53	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	68	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
54	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	69	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
55	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	70	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
56	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	71	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
57		72
58	char *env;	73	char *env;
59	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);	74	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);	75	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
63	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);	76	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
64	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);	77	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
65	asprintf (&env, "MTU=%d", mtu); putenv (env);	78	asprintf (&env, "MTU=%d", mtu); putenv (env);
66	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	79	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
67	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,	80	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
68	THISNODE->id & 0xff);
69	putenv (env);
70		81
		82	conns [THISNODE->id - 1]->script_init_env ("");
		83
		84	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		85	{
		86	char ext[16];
		87	snprintf (ext, 16, "_%d", (*c)->conf->id);
		88	(*c)->script_init_env (ext);
		89	}
		90	}
		91
		92	inline const char *
		93	vpn::script_if_init ()
		94	{
		95	script_init_env ();
		96
		97	return tap->if_up ();
		98	}
		99
		100	inline const char *
		101	vpn::script_if_up ()
		102	{
		103	script_init_env ();
		104
		105	char *filename;
		106	asprintf (&filename,
		107	"%s/%s",
		108	confbase,
71	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	109	::conf.script_if_up ? ::conf.script_if_up : "if-up");
		110
		111	return filename;
72	}	112	}
73		113
74	int	114	int
75	vpn::setup ()	115	vpn::setup ()
76	{	116	{
		117	ipv4_tos = -1;
77	ipv4_fd = -1;	118	ipv4_fd = -1;
78		119
79	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	120	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
80	{	121	{
81	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	122	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
82		123
83	if (ipv4_fd < 0)	124	if (ipv4_fd < 0)
84	return -1;	125	return -1;
85		126
86	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	127	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		128	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
87		129
88	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	130	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
89	// this I really consider a linux bug. I am neither connected	131	// this I really consider a linux bug. I am neither connected
90	// nor do I fragment myself. Linux still sets DF and doesn't	132	// nor do I fragment myself. Linux still sets DF and doesn't
91	// fragment for me sometimes.	133	// fragment for me sometimes.
…		…
98	sockinfo si (THISNODE, PROT_IPv4);	140	sockinfo si (THISNODE, PROT_IPv4);
99		141
100	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	142	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
101	{	143	{
102	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	144	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
103	exit (1);	145	exit (EXIT_FAILURE);
104	}	146	}
105		147
106	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	148	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
107	}	149	}
108		150
		151	udpv4_tos = -1;
109	udpv4_fd = -1;	152	udpv4_fd = -1;
110		153
111	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	154	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
112	{	155	{
113	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	156	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
114		157
115	if (udpv4_fd < 0)	158	if (udpv4_fd < 0)
116	return -1;	159	return -1;
117		160
118	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	161	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		162	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
119		163
120	// standard daemon practise...	164	// standard daemon practise...
121	{	165	{
122	int oval = 1;	166	int oval = 1;
123	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	167	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
136	sockinfo si (THISNODE, PROT_UDPv4);	180	sockinfo si (THISNODE, PROT_UDPv4);
137		181
138	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	182	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
139	{	183	{
140	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	184	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
141	exit (1);	185	exit (EXIT_FAILURE);
142	}	186	}
143		187
144	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	188	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
145	}	189	}
146		190
		191	icmpv4_tos = -1;
147	icmpv4_fd = -1;	192	icmpv4_fd = -1;
148		193
149	#if ENABLE_ICMP	194	#if ENABLE_ICMP
150	if (THISNODE->protocols & PROT_ICMPv4)	195	if (THISNODE->protocols & PROT_ICMPv4)
151	{	196	{
152	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	197	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
153		198
154	if (icmpv4_fd < 0)	199	if (icmpv4_fd < 0)
155	return -1;	200	return -1;
156		201
157	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	202	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		203	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
158		204
159	#ifdef ICMP_FILTER	205	#ifdef ICMP_FILTER
160	{	206	{
161	icmp_filter oval;	207	icmp_filter oval;
162	oval.data = 0xffffffff;	208	oval.data = 0xffffffff;
…		…
171	// this I really consider a linux bug. I am neither connected	217	// this I really consider a linux bug. I am neither connected
172	// nor do I fragment myself. Linux still sets DF and doesn't	218	// nor do I fragment myself. Linux still sets DF and doesn't
173	// fragment for me sometimes.	219	// fragment for me sometimes.
174	{	220	{
175	int oval = IP_PMTUDISC_DONT;	221	int oval = IP_PMTUDISC_DONT;
176	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	222	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
177	}	223	}
178	#endif	224	#endif
179		225
180	sockinfo si (THISNODE, PROT_ICMPv4);	226	sockinfo si (THISNODE, PROT_ICMPv4);
181		227
182	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	228	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
183	{	229	{
184	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	230	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
185	exit (1);	231	exit (EXIT_FAILURE);
186	}	232	}
187		233
188	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	234	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
189	}	235	}
190	#endif	236	#endif
191		237
192	tcpv4_fd = -1;	238	tcpv4_fd = -1;
193		239
…		…
198		244
199	if (tcpv4_fd < 0)	245	if (tcpv4_fd < 0)
200	return -1;	246	return -1;
201		247
202	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	248	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		249	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
203		250
204	// standard daemon practise...	251	// standard daemon practise...
205	{	252	{
206	int oval = 1;	253	int oval = 1;
207	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	254	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
210	sockinfo si (THISNODE, PROT_TCPv4);	257	sockinfo si (THISNODE, PROT_TCPv4);
211		258
212	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	259	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
213	{	260	{
214	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	261	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
215	exit (1);	262	exit (EXIT_FAILURE);
216	}	263	}
217		264
218	if (listen (tcpv4_fd, 5))	265	if (listen (tcpv4_fd, 5))
219	{	266	{
220	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	267	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
221	exit (1);	268	exit (EXIT_FAILURE);
		269	}
		270
		271	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		272	}
		273	#endif
		274
		275	dnsv4_tos = -1;
		276	dnsv4_fd = -1;
		277
		278	#if ENABLE_DNS
		279	if (THISNODE->protocols & PROT_DNSv4)
		280	{
		281	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		282
		283	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		284
		285	if (dnsv4_fd < 0)
		286	return -1;
		287
		288	fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK);
		289	fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC);
		290
		291	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		292	// this I really consider a linux bug. I am neither connected
		293	// nor do I fragment myself. Linux still sets DF and doesn't
		294	// fragment for me sometimes.
		295	{
		296	int oval = IP_PMTUDISC_DONT;
		297	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
222	}	298	}
223
224	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
225	}
226	#endif	299	# endif
		300
		301	// standard daemon practise...
		302	{
		303	int oval = 1;
		304	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		305	}
		306
		307	sockinfo si (THISNODE->dns_hostname,
		308	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		309	PROT_DNSv4);
		310
		311	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		312	{
		313	slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
		314	exit (EXIT_FAILURE);
		315	}
		316
		317	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		318	}
		319	#endif
		320
		321	/////////////////////////////////////////////////////////////////////////////
		322
		323	reconnect_all ();
		324
		325	/////////////////////////////////////////////////////////////////////////////
227		326
228	tap = new tap_device ();	327	tap = new tap_device ();
229	if (!tap) //D this, of course, never catches	328	if (!tap) //D this, of course, never catches
230	{	329	{
231	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	330	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
232	exit (1);	331	exit (EXIT_FAILURE);
233	}	332	}
234		333
235	run_script (run_script_cb (this, &vpn::script_if_up), true);	334	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
236		335
		336	run_script_cb cb;
		337	cb.set<vpn, &vpn::script_if_init> (this);
		338
		339	if (tap->if_up () &&
		340	!run_script (cb, true))
		341	{
		342	slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
		343	tap->if_up ());
		344	exit (EXIT_FAILURE);
		345	}
		346
		347	cb.set<vpn, &vpn::script_if_up> (this);
		348	if (!run_script (cb, true))
		349	{
		350	slog (L_ERR, _("if-up command execution failed, exiting."));
		351	exit (EXIT_FAILURE);
		352	}
		353
237	tap_ev_watcher.start (tap->fd, POLLIN);	354	tap_ev_watcher.start (tap->fd, EV_READ);
238
239	reconnect_all ();
240		355
241	return 0;	356	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	}	357	}
271		358
272	bool	359	bool
273	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	360	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
274	{	361	{
275	#if defined(SOL_IP) && defined(IP_TOS)	362	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 ());	363	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
279		364
280	return true;	365	return true;
281	}	366	}
282		367
…		…
305		390
306	#if ENABLE_ICMP	391	#if ENABLE_ICMP
307	bool	392	bool
308	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	393	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
309	{	394	{
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);	395	pkt->unshift_hdr (4);
315		396
316	icmp_header hdr = (icmp_header )&((*pkt)[0]);	397	icmp_header hdr = (icmp_header )&((*pkt)[0]);
317	hdr->type = ::conf.icmp_type;	398	hdr->type = ::conf.icmp_type;
318	hdr->code = 255;	399	hdr->code = 255;
319	hdr->checksum = 0;	400	hdr->checksum = 0;
320	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	401	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
321		402
		403	set_tos (icmpv4_fd, icmpv4_tos, tos);
322	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	404	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
323		405
324	return true;	406	return true;
325	}	407	}
326	#endif	408	#endif
327		409
328	bool	410	bool
329	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	411	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
330	{	412	{
331	#if defined(SOL_IP) && defined(IP_TOS)	413	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 ());	414	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
335		415
336	return true;	416	return true;
337	}	417	}
338		418
…		…
349	{	429	{
350	// broadcast, this is ugly, but due to the security policy	430	// broadcast, this is ugly, but due to the security policy
351	// we have to connect to all hosts...	431	// we have to connect to all hosts...
352	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	432	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
353	if ((*c)->conf != THISNODE)	433	if ((*c)->conf != THISNODE)
354	(*c)->inject_data_packet (pkt, true);	434	(*c)->inject_data_packet (pkt);
355	}	435	}
356	}	436	}
357		437
358	void	438	void
359	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	439	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
…		…
393	else	473	else
394	c->recv_vpn_packet (pkt, rsi);	474	c->recv_vpn_packet (pkt, rsi);
395	}	475	}
396	}	476	}
397		477
398	void	478	bool
		479	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		480	{
		481	switch (si.prot)
		482	{
		483	case PROT_IPv4:
		484	return send_ipv4_packet (pkt, si, tos);
		485
		486	case PROT_UDPv4:
		487	return send_udpv4_packet (pkt, si, tos);
		488
		489	#if ENABLE_TCP
		490	case PROT_TCPv4:
		491	return send_tcpv4_packet (pkt, si, tos);
		492	#endif
		493	#if ENABLE_ICMP
		494	case PROT_ICMPv4:
		495	return send_icmpv4_packet (pkt, si, tos);
		496	#endif
		497	#if ENABLE_DNS
		498	case PROT_DNSv4:
		499	return send_dnsv4_packet (pkt, si, tos);
		500	#endif
		501	default:
		502	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
		503	}
		504
		505	return false;
		506	}
		507
		508	inline void
399	vpn::ipv4_ev (io_watcher &w, short revents)	509	vpn::ipv4_ev (ev::io &w, int revents)
400	{	510	{
401	if (revents & (POLLIN \| POLLERR))	511	if (revents & EV_READ)
402	{	512	{
403	vpn_packet *pkt = new vpn_packet;	513	vpn_packet *pkt = new vpn_packet;
404	struct sockaddr_in sa;	514	struct sockaddr_in sa;
405	socklen_t sa_len = sizeof (sa);	515	socklen_t sa_len = sizeof (sa);
406	int len;	516	int len;
…		…
411		521
412	if (len > 0)	522	if (len > 0)
413	{	523	{
414	pkt->len = len;	524	pkt->len = len;
415		525
416	// raw sockets deliver the ipv4, but don't expect it on sends	526	// raw sockets deliver the ipv4 header, but don't expect it on sends
417	// this is slow, but...
418	pkt->skip_hdr (IP_OVERHEAD);	527	pkt->skip_hdr (IP_OVERHEAD);
419		528
420	recv_vpn_packet (pkt, si);	529	recv_vpn_packet (pkt, si);
421	}	530	}
422	else	531	else
…		…
425	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	534	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
426	}	535	}
427		536
428	delete pkt;	537	delete pkt;
429	}	538	}
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	539	else
437	{	540	{
438	slog (L_ERR,	541	slog (L_ERR,
439	_("FATAL: unknown revents %08x in socket, terminating\n"),	542	_("FATAL: unknown revents %08x in socket, terminating\n"),
440	revents);	543	revents);
441	exit (1);	544	exit (EXIT_FAILURE);
442	}	545	}
443	}	546	}
444		547
445	#if ENABLE_ICMP	548	#if ENABLE_ICMP
446	void	549	inline void
447	vpn::icmpv4_ev (io_watcher &w, short revents)	550	vpn::icmpv4_ev (ev::io &w, int revents)
448	{	551	{
449	if (revents & (POLLIN \| POLLERR))	552	if (revents & EV_READ)
450	{	553	{
451	vpn_packet *pkt = new vpn_packet;	554	vpn_packet *pkt = new vpn_packet;
452	struct sockaddr_in sa;	555	struct sockaddr_in sa;
453	socklen_t sa_len = sizeof (sa);	556	socklen_t sa_len = sizeof (sa);
454	int len;	557	int len;
…		…
479	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	582	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
480	}	583	}
481		584
482	delete pkt;	585	delete pkt;
483	}	586	}
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	587	else
491	{	588	{
492	slog (L_ERR,	589	slog (L_ERR,
493	_("FATAL: unknown revents %08x in socket, terminating\n"),	590	_("FATAL: unknown revents %08x in socket, terminating\n"),
494	revents);	591	revents);
495	exit (1);	592	exit (EXIT_FAILURE);
496	}	593	}
497	}	594	}
498	#endif	595	#endif
499		596
500	void	597	inline void
501	vpn::udpv4_ev (io_watcher &w, short revents)	598	vpn::udpv4_ev (ev::io &w, int revents)
502	{	599	{
503	if (revents & (POLLIN \| POLLERR))	600	if (revents & EV_READ)
504	{	601	{
505	vpn_packet *pkt = new vpn_packet;	602	vpn_packet *pkt = new vpn_packet;
506	struct sockaddr_in sa;	603	struct sockaddr_in sa;
507	socklen_t sa_len = sizeof (sa);	604	socklen_t sa_len = sizeof (sa);
508	int len;	605	int len;
…		…
523	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	620	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
524	}	621	}
525		622
526	delete pkt;	623	delete pkt;
527	}	624	}
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	625	else
535	{	626	{
536	slog (L_ERR,	627	slog (L_ERR,
537	_("FATAL: unknown revents %08x in socket, terminating\n"),	628	_("FATAL: unknown revents %08x in socket, terminating\n"),
538	revents);	629	revents);
539	exit (1);	630	exit (EXIT_FAILURE);
540	}	631	}
541	}	632	}
542		633
543	void	634	inline void
544	vpn::tap_ev (io_watcher &w, short revents)	635	vpn::tap_ev (ev::io &w, int revents)
545	{	636	{
546	if (revents & POLLIN)	637	if (revents & EV_READ)
547	{	638	{
548	/* process data */	639	/* process data */
549	tap_packet *pkt;	640	tap_packet *pkt;
550		641
551	pkt = tap->recv ();	642	pkt = tap->recv ();
…		…
558	int dst = mac2id (pkt->dst);	649	int dst = mac2id (pkt->dst);
559	int src = mac2id (pkt->src);	650	int src = mac2id (pkt->src);
560		651
561	if (src != THISNODE->id)	652	if (src != THISNODE->id)
562	{	653	{
563	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));	654	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
564	exit (1);	655	exit (EXIT_FAILURE);
565	}	656	}
566		657
567	if (dst == THISNODE->id)	658	if (dst == THISNODE->id)
568	{	659	{
569	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));	660	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
570	exit (1);	661	exit (EXIT_FAILURE);
571	}	662	}
572		663
573	if (dst > conns.size ())	664	if (dst > conns.size ())
574	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);	665	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
575	else	666	else
576	inject_data_packet (pkt, dst);	667	inject_data_packet (pkt, dst);
577	}	668	}
578		669
579	delete pkt;	670	delete pkt;
580	}	671	}
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	672	else
587	abort ();	673	abort ();
588	}	674	}
589		675
590	void	676	inline void
591	vpn::event_cb (time_watcher &w)	677	vpn::event_cb (ev::timer &w, int)
592	{	678	{
593	if (events)	679	if (events)
594	{	680	{
595	if (events & EVENT_SHUTDOWN)	681	if (events & EVENT_SHUTDOWN)
596	{	682	{
597	slog (L_INFO, _("preparing shutdown..."));	683	slog (L_INFO, _("preparing shutdown..."));
598		684
599	shutdown_all ();	685	shutdown_all ();
600
601	remove_pid (pidfilename);	686	remove_pid (conf.pidfilename);
602
603	slog (L_INFO, _("terminating"));	687	slog (L_INFO, _("terminating"));
604		688	exit (EXIT_SUCCESS);
605	exit (0);
606	}	689	}
607		690
608	if (events & EVENT_RECONNECT)	691	if (events & EVENT_RECONNECT)
609	{	692	{
610	slog (L_INFO, _("forced reconnect"));	693	slog (L_INFO, _("forced reconnect"));
…		…
612	reconnect_all ();	695	reconnect_all ();
613	}	696	}
614		697
615	events = 0;	698	events = 0;
616	}	699	}
617
618	w.at = TSTAMP_CANCEL;
619	}	700	}
620		701
621	void	702	void
622	vpn::shutdown_all ()	703	vpn::shutdown_all ()
623	{	704	{
…		…
636	connection_init ();	717	connection_init ();
637		718
638	for (configuration::node_vector::iterator i = conf.nodes.begin ();	719	for (configuration::node_vector::iterator i = conf.nodes.begin ();
639	i != conf.nodes.end (); ++i)	720	i != conf.nodes.end (); ++i)
640	{	721	{
641	connection *conn = new connection (this);	722	connection conn = new connection (this, i);
642
643	conn->conf = *i;
644	conns.push_back (conn);	723	conns.push_back (conn);
645
646	conn->establish_connection ();	724	conn->establish_connection ();
647	}	725	}
648	}	726	}
649		727
650	connection *vpn::find_router ()	728	connection *vpn::find_router ()
…		…
695	}	773	}
696		774
697	void	775	void
698	vpn::dump_status ()	776	vpn::dump_status ()
699	{	777	{
700	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	778	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
701		779
702	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	780	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
703	(*c)->dump_status ();	781	(*c)->dump_status ();
704		782
705	slog (L_NOTICE, _("END status dump"));	783	slog (L_NOTICE, _("END status dump"));
706	}	784	}
707		785
708	vpn::vpn (void)	786	vpn::vpn (void)
		787	{
709	: event (this, &vpn::event_cb)	788	event .set<vpn, &vpn::event_cb > (this);
710	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	789	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
711	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	790	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
712	#if ENABLE_TCP	791	#if ENABLE_TCP
713	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	792	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
714	#endif	793	#endif
715	#if ENABLE_ICMP	794	#if ENABLE_ICMP
716	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	795	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
717	#endif	796	#endif
718	, tap_ev_watcher (this, &vpn::tap_ev)	797	#if ENABLE_DNS
719	{	798	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		799	#endif
		800	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
720	}	801	}
721		802
722	vpn::~vpn ()	803	vpn::~vpn ()
723	{	804	{
724	}	805	}

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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 1.46 by pcg, Thu Aug 7 17:30:28 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 1.46 by pcg, Thu Aug 7 17:30:28 2008 UTC