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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.17 by pcg, Wed Oct 15 06:06:41 2003 UTC vs.
Revision 1.41 by pcg, Sun Dec 2 00:20:19 2007 UTC

…		…
1	/*	1	/*
2	vpn.C -- handle the protocol, encryption, handshaking etc.	2	vpn.C -- handle the protocol, encryption, handshaking etc.
		3	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
3		4
		5	This file is part of GVPE.
		6
4	This program is free software; you can redistribute it and/or modify	7	GVPE is free software; you can redistribute it and/or modify
5	it under the terms of the GNU General Public License as published by	8	it under the terms of the GNU General Public License as published by
6	the Free Software Foundation; either version 2 of the License, or	9	the Free Software Foundation; either version 2 of the License, or
7	(at your option) any later version.	10	(at your option) any later version.
8		11
9	This program is distributed in the hope that it will be useful,	12	This program is distributed in the hope that it will be useful,
10	but WITHOUT ANY WARRANTY; without even the implied warranty of	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12	GNU General Public License for more details.	15	GNU General Public License for more details.
13		16
14	You should have received a copy of the GNU General Public License	17	You should have received a copy of the GNU General Public License
15	along with this program; if not, write to the Free Software	18	along with gvpe; if not, write to the Free Software
16	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA	19	Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17	*/	20	*/
18		21
19	#include "config.h"	22	#include "config.h"
20		23
21	#include <list>	24	#include <list>
22		25
		26	#include <cstdio>
		27	#include <cstring>
23	#include <cstdlib>	28	#include <cstdlib>
24	#include <cstring>
25	#include <cstdio>
26		29
27	#include <sys/types.h>	30	#include <sys/types.h>
28	#include <sys/socket.h>	31	#include <sys/socket.h>
29	#include <sys/wait.h>	32	#include <sys/wait.h>
30	#include <errno.h>	33	#include <errno.h>
39		42
40	#include "connection.h"	43	#include "connection.h"
41	#include "util.h"	44	#include "util.h"
42	#include "vpn.h"	45	#include "vpn.h"
43		46
		47	vpn network; // THE vpn (bad design...)
		48
44	/////////////////////////////////////////////////////////////////////////////	49	/////////////////////////////////////////////////////////////////////////////
45		50
46	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 ()
47	{	65	{
48	// the tunnel device mtu should be the physical mtu - overhead	66	// the tunnel device mtu should be the physical mtu - overhead
49	// the tricky part is rounding to the cipher key blocksize	67	// the tricky part is rounding to the cipher key blocksize
50	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	68	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
51	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	69	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
52	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	70	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
53	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	71	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
54		72
55	char *env;	73	char *env;
56	asprintf (&env, "CONFBASE=%s", confbase);	74	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
57	putenv (env);
58	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
59	putenv (env);
60	asprintf (&env, "NODEID=%d", THISNODE->id);
61	putenv (env);
62	asprintf (&env, "IFNAME=%s", tap->interface ());	75	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
63	putenv (env);	76	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		77	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
64	asprintf (&env, "MTU=%d", mtu);	78	asprintf (&env, "MTU=%d", mtu); putenv (env);
65	putenv (env);	79	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
66	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	80	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
67	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
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	const char *vpn::script_if_init ()
		93	{
		94	script_init_env ();
		95
		96	return tap->if_up ();
		97	}
		98
		99	const char *vpn::script_if_up ()
		100	{
		101	script_init_env ();
		102
		103	char *filename;
		104	asprintf (&filename,
		105	"%s/%s",
		106	confbase,
71	return ::conf.script_if_up ? ::conf.script_if_up : "if-up";	107	::conf.script_if_up ? ::conf.script_if_up : "if-up");
		108
		109	return filename;
72	}	110	}
73		111
74	int	112	int
75	vpn::setup ()	113	vpn::setup ()
76	{	114	{
		115	ipv4_tos = -1;
77	ipv4_fd = -1;	116	ipv4_fd = -1;
78		117
79	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	118	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
80	{	119	{
81	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	120	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
82		121
83	if (ipv4_fd < 0)	122	if (ipv4_fd < 0)
84	return -1;	123	return -1;
85		124
86	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	125	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		126	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
87		127
88	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	128	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
89	// this I really consider a linux bug. I am neither connected	129	// this I really consider a linux bug. I am neither connected
90	// nor do I fragment myself. Linux still sets DF and doesn't	130	// nor do I fragment myself. Linux still sets DF and doesn't
91	// fragment for me sometimes.	131	// fragment for me sometimes.
…		…
98	sockinfo si (THISNODE, PROT_IPv4);	138	sockinfo si (THISNODE, PROT_IPv4);
99		139
100	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	140	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
101	{	141	{
102	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	142	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
103	exit (1);	143	exit (EXIT_FAILURE);
104	}	144	}
105		145
106	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	146	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
107	}	147	}
108		148
		149	udpv4_tos = -1;
109	udpv4_fd = -1;	150	udpv4_fd = -1;
110		151
111	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	152	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
112	{	153	{
113	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	154	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
114		155
115	if (udpv4_fd < 0)	156	if (udpv4_fd < 0)
116	return -1;	157	return -1;
117		158
118	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	159	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		160	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
119		161
120	// standard daemon practise...	162	// standard daemon practise...
121	{	163	{
122	int oval = 1;	164	int oval = 1;
123	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	165	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
136	sockinfo si (THISNODE, PROT_UDPv4);	178	sockinfo si (THISNODE, PROT_UDPv4);
137		179
138	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	180	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
139	{	181	{
140	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	182	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
141	exit (1);	183	exit (EXIT_FAILURE);
142	}	184	}
143		185
144	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	186	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
145	}	187	}
146		188
		189	icmpv4_tos = -1;
147	icmpv4_fd = -1;	190	icmpv4_fd = -1;
148		191
149	#if ENABLE_ICMP	192	#if ENABLE_ICMP
150	if (THISNODE->protocols & PROT_ICMPv4)	193	if (THISNODE->protocols & PROT_ICMPv4)
151	{	194	{
152	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	195	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
153		196
154	if (icmpv4_fd < 0)	197	if (icmpv4_fd < 0)
155	return -1;	198	return -1;
156		199
157	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	200	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		201	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
158		202
159	#ifdef ICMP_FILTER	203	#ifdef ICMP_FILTER
160	{	204	{
161	icmp_filter oval;	205	icmp_filter oval;
162	oval.data = 0xffffffff;	206	oval.data = 0xffffffff;
…		…
171	// this I really consider a linux bug. I am neither connected	215	// this I really consider a linux bug. I am neither connected
172	// nor do I fragment myself. Linux still sets DF and doesn't	216	// nor do I fragment myself. Linux still sets DF and doesn't
173	// fragment for me sometimes.	217	// fragment for me sometimes.
174	{	218	{
175	int oval = IP_PMTUDISC_DONT;	219	int oval = IP_PMTUDISC_DONT;
176	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	220	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
177	}	221	}
178	#endif	222	#endif
179		223
180	sockinfo si (THISNODE, PROT_ICMPv4);	224	sockinfo si (THISNODE, PROT_ICMPv4);
181		225
182	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	226	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
183	{	227	{
184	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	228	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
185	exit (1);	229	exit (EXIT_FAILURE);
186	}	230	}
187		231
188	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	232	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
189	}	233	}
190	#endif	234	#endif
191		235
192	tcpv4_fd = -1;	236	tcpv4_fd = -1;
193		237
…		…
198		242
199	if (tcpv4_fd < 0)	243	if (tcpv4_fd < 0)
200	return -1;	244	return -1;
201		245
202	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	246	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		247	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
203		248
204	// standard daemon practise...	249	// standard daemon practise...
205	{	250	{
206	int oval = 1;	251	int oval = 1;
207	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	252	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
210	sockinfo si (THISNODE, PROT_TCPv4);	255	sockinfo si (THISNODE, PROT_TCPv4);
211		256
212	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	257	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
213	{	258	{
214	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	259	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
215	exit (1);	260	exit (EXIT_FAILURE);
216	}	261	}
217		262
218	if (listen (tcpv4_fd, 5))	263	if (listen (tcpv4_fd, 5))
219	{	264	{
220	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	265	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
221	exit (1);	266	exit (EXIT_FAILURE);
		267	}
		268
		269	tcpv4_ev_watcher.start (tcpv4_fd, EV_READ);
		270	}
		271	#endif
		272
		273	dnsv4_tos = -1;
		274	dnsv4_fd = -1;
		275
		276	#if ENABLE_DNS
		277	if (THISNODE->protocols & PROT_DNSv4)
		278	{
		279	dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
		280
		281	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		282
		283	if (dnsv4_fd < 0)
		284	return -1;
		285
		286	fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK);
		287	fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC);
		288
		289	# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
		290	// this I really consider a linux bug. I am neither connected
		291	// nor do I fragment myself. Linux still sets DF and doesn't
		292	// fragment for me sometimes.
		293	{
		294	int oval = IP_PMTUDISC_DONT;
		295	setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
222	}	296	}
223
224	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
225	}
226	#endif	297	# endif
		298
		299	// standard daemon practise...
		300	{
		301	int oval = 1;
		302	setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		303	}
		304
		305	sockinfo si (THISNODE->dns_hostname,
		306	THISNODE->dns_hostname ? THISNODE->dns_port : 0,
		307	PROT_DNSv4);
		308
		309	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
		310	{
		311	slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
		312	exit (EXIT_FAILURE);
		313	}
		314
		315	dnsv4_ev_watcher.start (dnsv4_fd, EV_READ);
		316	}
		317	#endif
		318
		319	/////////////////////////////////////////////////////////////////////////////
		320
		321	reconnect_all ();
		322
		323	/////////////////////////////////////////////////////////////////////////////
227		324
228	tap = new tap_device ();	325	tap = new tap_device ();
229	if (!tap) //D this, of course, never catches	326	if (!tap) //D this, of course, never catches
230	{	327	{
231	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	328	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
232	exit (1);	329	exit (EXIT_FAILURE);
233	}	330	}
234		331
		332	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
		333
		334	if (tap->if_up () &&
		335	!run_script (run_script_cb (this, &vpn::script_if_init), true))
		336	{
		337	slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
		338	tap->if_up ());
		339	exit (EXIT_FAILURE);
		340	}
		341
235	run_script (run_script_cb (this, &vpn::script_if_up), true);	342	if (!run_script (run_script_cb (this, &vpn::script_if_up), true))
		343	{
		344	slog (L_ERR, _("if-up command execution failed, exiting."));
		345	exit (EXIT_FAILURE);
		346	}
236		347
237	tap_ev_watcher.start (tap->fd, POLLIN);	348	tap_ev_watcher.start (tap->fd, EV_READ);
238
239	reconnect_all ();
240		349
241	return 0;	350	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	}	351	}
271		352
272	bool	353	bool
273	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	354	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
274	{	355	{
275	#if defined(SOL_IP) && defined(IP_TOS)	356	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 ());	357	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
279		358
280	return true;	359	return true;
281	}	360	}
282		361
…		…
305		384
306	#if ENABLE_ICMP	385	#if ENABLE_ICMP
307	bool	386	bool
308	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	387	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
309	{	388	{
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);	389	pkt->unshift_hdr (4);
315		390
316	icmp_header hdr = (icmp_header )&((*pkt)[0]);	391	icmp_header hdr = (icmp_header )&((*pkt)[0]);
317	hdr->type = ::conf.icmp_type;	392	hdr->type = ::conf.icmp_type;
318	hdr->code = 255;	393	hdr->code = 255;
319	hdr->checksum = 0;	394	hdr->checksum = 0;
320	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	395	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
321		396
		397	set_tos (icmpv4_fd, icmpv4_tos, tos);
322	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	398	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
323		399
324	return true;	400	return true;
325	}	401	}
326	#endif	402	#endif
327		403
328	bool	404	bool
329	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	405	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
330	{	406	{
331	#if defined(SOL_IP) && defined(IP_TOS)	407	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 ());	408	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
335		409
336	return true;	410	return true;
		411	}
		412
		413	void
		414	vpn::inject_data_packet (tap_packet *pkt, int dst)
		415	{
		416	if (dst)
		417	{
		418	// unicast
		419	if (dst != THISNODE->id)
		420	conns[dst - 1]->inject_data_packet (pkt);
		421	}
		422	else
		423	{
		424	// broadcast, this is ugly, but due to the security policy
		425	// we have to connect to all hosts...
		426	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		427	if ((*c)->conf != THISNODE)
		428	(*c)->inject_data_packet (pkt, true);
		429	}
337	}	430	}
338		431
339	void	432	void
340	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	433	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
341	{	434	{
…		…
358	connection *c = conns[src - 1];	451	connection *c = conns[src - 1];
359		452
360	if (dst == 0)	453	if (dst == 0)
361	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	454	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
362	c->conf->nodename, (const char *)rsi);	455	c->conf->nodename, (const char *)rsi);
363	else if (dst != 0 && dst != THISNODE->id)	456	else if (dst != THISNODE->id)
364	{	457	{
365	if (THISNODE->routerprio)	458	if (THISNODE->routerprio)
366	// the tos setting gets lost here. who cares.	459	// the tos setting gets lost here. who cares.
367	conns[dst - 1]->inject_vpn_packet (pkt);	460	conns[dst - 1]->inject_vpn_packet (pkt);
368	else	461	else
…		…
374	else	467	else
375	c->recv_vpn_packet (pkt, rsi);	468	c->recv_vpn_packet (pkt, rsi);
376	}	469	}
377	}	470	}
378		471
		472	bool
		473	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		474	{
		475	switch (si.prot)
		476	{
		477	case PROT_IPv4:
		478	return send_ipv4_packet (pkt, si, tos);
		479
		480	case PROT_UDPv4:
		481	return send_udpv4_packet (pkt, si, tos);
		482
		483	#if ENABLE_TCP
		484	case PROT_TCPv4:
		485	return send_tcpv4_packet (pkt, si, tos);
		486	#endif
		487	#if ENABLE_ICMP
		488	case PROT_ICMPv4:
		489	return send_icmpv4_packet (pkt, si, tos);
		490	#endif
		491	#if ENABLE_DNS
		492	case PROT_DNSv4:
		493	return send_dnsv4_packet (pkt, si, tos);
		494	#endif
		495	default:
		496	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
		497	}
		498
		499	return false;
		500	}
		501
379	void	502	void
380	vpn::ipv4_ev (io_watcher &w, short revents)	503	vpn::ipv4_ev (ev::io &w, int revents)
381	{	504	{
382	if (revents & (POLLIN \| POLLERR))	505	if (revents & EV_READ)
383	{	506	{
384	vpn_packet *pkt = new vpn_packet;	507	vpn_packet *pkt = new vpn_packet;
385	struct sockaddr_in sa;	508	struct sockaddr_in sa;
386	socklen_t sa_len = sizeof (sa);	509	socklen_t sa_len = sizeof (sa);
387	int len;	510	int len;
…		…
392		515
393	if (len > 0)	516	if (len > 0)
394	{	517	{
395	pkt->len = len;	518	pkt->len = len;
396		519
397	// raw sockets deliver the ipv4, but don't expect it on sends	520	// raw sockets deliver the ipv4 header, but don't expect it on sends
398	// this is slow, but...
399	pkt->skip_hdr (IP_OVERHEAD);	521	pkt->skip_hdr (IP_OVERHEAD);
400		522
401	recv_vpn_packet (pkt, si);	523	recv_vpn_packet (pkt, si);
402	}	524	}
403	else	525	else
…		…
406	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	528	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
407	}	529	}
408		530
409	delete pkt;	531	delete pkt;
410	}	532	}
411	else if (revents & POLLHUP)
412	{
413	// this cannot ;) happen on udp sockets
414	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
415	exit (1);
416	}
417	else	533	else
418	{	534	{
419	slog (L_ERR,	535	slog (L_ERR,
420	_("FATAL: unknown revents %08x in socket, terminating\n"),	536	_("FATAL: unknown revents %08x in socket, terminating\n"),
421	revents);	537	revents);
422	exit (1);	538	exit (EXIT_FAILURE);
423	}	539	}
424	}	540	}
425		541
426	#if ENABLE_ICMP	542	#if ENABLE_ICMP
427	void	543	void
428	vpn::icmpv4_ev (io_watcher &w, short revents)	544	vpn::icmpv4_ev (ev::io &w, int revents)
429	{	545	{
430	if (revents & (POLLIN \| POLLERR))	546	if (revents & EV_READ)
431	{	547	{
432	vpn_packet *pkt = new vpn_packet;	548	vpn_packet *pkt = new vpn_packet;
433	struct sockaddr_in sa;	549	struct sockaddr_in sa;
434	socklen_t sa_len = sizeof (sa);	550	socklen_t sa_len = sizeof (sa);
435	int len;	551	int len;
…		…
460	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	576	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
461	}	577	}
462		578
463	delete pkt;	579	delete pkt;
464	}	580	}
465	else if (revents & POLLHUP)
466	{
467	// this cannot ;) happen on udp sockets
468	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
469	exit (1);
470	}
471	else	581	else
472	{	582	{
473	slog (L_ERR,	583	slog (L_ERR,
474	_("FATAL: unknown revents %08x in socket, terminating\n"),	584	_("FATAL: unknown revents %08x in socket, terminating\n"),
475	revents);	585	revents);
476	exit (1);	586	exit (EXIT_FAILURE);
477	}	587	}
478	}	588	}
479	#endif	589	#endif
480		590
481	void	591	void
482	vpn::udpv4_ev (io_watcher &w, short revents)	592	vpn::udpv4_ev (ev::io &w, int revents)
483	{	593	{
484	if (revents & (POLLIN \| POLLERR))	594	if (revents & EV_READ)
485	{	595	{
486	vpn_packet *pkt = new vpn_packet;	596	vpn_packet *pkt = new vpn_packet;
487	struct sockaddr_in sa;	597	struct sockaddr_in sa;
488	socklen_t sa_len = sizeof (sa);	598	socklen_t sa_len = sizeof (sa);
489	int len;	599	int len;
…		…
504	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	614	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
505	}	615	}
506		616
507	delete pkt;	617	delete pkt;
508	}	618	}
509	else if (revents & POLLHUP)
510	{
511	// this cannot ;) happen on udp sockets
512	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
513	exit (1);
514	}
515	else	619	else
516	{	620	{
517	slog (L_ERR,	621	slog (L_ERR,
518	_("FATAL: unknown revents %08x in socket, terminating\n"),	622	_("FATAL: unknown revents %08x in socket, terminating\n"),
519	revents);	623	revents);
520	exit (1);	624	exit (EXIT_FAILURE);
521	}	625	}
522	}	626	}
523		627
524	void	628	void
525	vpn::tap_ev (io_watcher &w, short revents)	629	vpn::tap_ev (ev::io &w, int revents)
526	{	630	{
527	if (revents & POLLIN)	631	if (revents & EV_READ)
528	{	632	{
529	/* process data */	633	/* process data */
530	tap_packet *pkt;	634	tap_packet *pkt;
531		635
532	pkt = tap->recv ();	636	pkt = tap->recv ();
…		…
539	int dst = mac2id (pkt->dst);	643	int dst = mac2id (pkt->dst);
540	int src = mac2id (pkt->src);	644	int src = mac2id (pkt->src);
541		645
542	if (src != THISNODE->id)	646	if (src != THISNODE->id)
543	{	647	{
544	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));	648	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
545	exit (1);	649	exit (EXIT_FAILURE);
546	}	650	}
547		651
548	if (dst == THISNODE->id)	652	if (dst == THISNODE->id)
549	{	653	{
550	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));	654	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
551	exit (1);	655	exit (EXIT_FAILURE);
552	}	656	}
553		657
554	if (dst > conns.size ())	658	if (dst > conns.size ())
555	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);	659	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
556	else	660	else
557	{
558	if (dst)
559	{
560	// unicast
561	if (dst != THISNODE->id)
562	conns[dst - 1]->inject_data_packet (pkt);
563	}
564	else
565	{
566	// broadcast, this is ugly, but due to the security policy
567	// we have to connect to all hosts...
568	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
569	if ((*c)->conf != THISNODE)
570	(*c)->inject_data_packet (pkt);	661	inject_data_packet (pkt, dst);
571	}
572	}
573	}	662	}
574		663
575	delete pkt;	664	delete pkt;
576	}
577	else if (revents & (POLLHUP \| POLLERR))
578	{
579	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
580	exit (1);
581	}	665	}
582	else	666	else
583	abort ();	667	abort ();
584	}	668	}
585		669
586	void	670	void
587	vpn::event_cb (time_watcher &w)	671	vpn::event_cb (ev::timer &w, int)
588	{	672	{
589	if (events)	673	if (events)
590	{	674	{
591	if (events & EVENT_SHUTDOWN)	675	if (events & EVENT_SHUTDOWN)
592	{	676	{
593	slog (L_INFO, _("preparing shutdown..."));	677	slog (L_INFO, _("preparing shutdown..."));
594		678
595	shutdown_all ();	679	shutdown_all ();
596
597	remove_pid (pidfilename);	680	remove_pid (conf.pidfilename);
598
599	slog (L_INFO, _("terminating"));	681	slog (L_INFO, _("terminating"));
600		682	exit (EXIT_SUCCESS);
601	exit (0);
602	}	683	}
603		684
604	if (events & EVENT_RECONNECT)	685	if (events & EVENT_RECONNECT)
605	{	686	{
606	slog (L_INFO, _("forced reconnect"));	687	slog (L_INFO, _("forced reconnect"));
…		…
608	reconnect_all ();	689	reconnect_all ();
609	}	690	}
610		691
611	events = 0;	692	events = 0;
612	}	693	}
613
614	w.at = TSTAMP_CANCEL;
615	}	694	}
616		695
617	void	696	void
618	vpn::shutdown_all ()	697	vpn::shutdown_all ()
619	{	698	{
…		…
632	connection_init ();	711	connection_init ();
633		712
634	for (configuration::node_vector::iterator i = conf.nodes.begin ();	713	for (configuration::node_vector::iterator i = conf.nodes.begin ();
635	i != conf.nodes.end (); ++i)	714	i != conf.nodes.end (); ++i)
636	{	715	{
637	connection *conn = new connection (this);	716	connection conn = new connection (this, i);
638
639	conn->conf = *i;
640	conns.push_back (conn);	717	conns.push_back (conn);
641
642	conn->establish_connection ();	718	conn->establish_connection ();
643	}	719	}
644	}	720	}
645		721
646	connection *vpn::find_router ()	722	connection *vpn::find_router ()
…		…
691	}	767	}
692		768
693	void	769	void
694	vpn::dump_status ()	770	vpn::dump_status ()
695	{	771	{
696	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	772	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
697		773
698	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	774	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
699	(*c)->dump_status ();	775	(*c)->dump_status ();
700		776
701	slog (L_NOTICE, _("END status dump"));	777	slog (L_NOTICE, _("END status dump"));
…		…
709	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	785	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
710	#endif	786	#endif
711	#if ENABLE_ICMP	787	#if ENABLE_ICMP
712	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	788	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
713	#endif	789	#endif
		790	#if ENABLE_DNS
		791	, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)
		792	#endif
714	, tap_ev_watcher (this, &vpn::tap_ev)	793	, tap_ev_watcher (this, &vpn::tap_ev)
715	{	794	{
716	}	795	}
717		796
718	vpn::~vpn ()	797	vpn::~vpn ()

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Comparing gvpe/src/vpn.C (file contents): Revision 1.17 by pcg, Wed Oct 15 06:06:41 2003 UTC vs. Revision 1.41 by pcg, Sun Dec 2 00:20:19 2007 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.17 by pcg, Wed Oct 15 06:06:41 2003 UTC vs.
Revision 1.41 by pcg, Sun Dec 2 00:20:19 2007 UTC