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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs.
Revision 1.45 by pcg, Thu Dec 6 00:35:29 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) 2003-2007 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/poll.h>
30	#include <sys/wait.h>	32	#include <sys/wait.h>
31	#include <errno.h>	33	#include <errno.h>
32	#include <time.h>	34	#include <time.h>
33	#include <unistd.h>	35	#include <unistd.h>
34	#include <fcntl.h>	36	#include <fcntl.h>
35	#include <sys/socket.h>	37	#include <sys/socket.h>
36	#include <netinet/in.h>	38
37	#include <arpa/inet.h>	39	#include "netcompat.h"
38	#include <net/if.h>
39	#ifdef HAVE_NETINET_IN_SYSTM_H
40	# include <netinet/in_systm.h>
41	#endif
42	#ifdef HAVE_NETINET_IP_H
43	# include <netinet/ip.h>
44	#endif
45	#ifdef HAVE_NETINET_TCP_H
46	# include <netinet/tcp.h>
47	#endif
48	#if ENABLE_ICMP
49	# include <netinet/ip_icmp.h>
50	#endif
51		40
52	#include "pidfile.h"	41	#include "pidfile.h"
53		42
54	#include "connection.h"	43	#include "connection.h"
55	#include "util.h"	44	#include "util.h"
56	#include "vpn.h"	45	#include "vpn.h"
57		46
58	#if !defined(SOL_IP) && defined(IPPROTO_IP)	47	vpn network; // THE vpn (bad design...)
59	# define SOL_IP IPPROTO_IP
60	#endif
61		48
62	/////////////////////////////////////////////////////////////////////////////	49	/////////////////////////////////////////////////////////////////////////////
63		50
64	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 ()
65	{	65	{
66	// the tunnel device mtu should be the physical mtu - overhead	66	// the tunnel device mtu should be the physical mtu - overhead
67	// the tricky part is rounding to the cipher key blocksize	67	// the tricky part is rounding to the cipher key blocksize
68	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;	68	int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
69	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	69	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
70	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	70	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
71	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	71	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
72		72
73	char *env;	73	char *env;
74	asprintf (&env, "CONFBASE=%s", confbase);	74	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
75	putenv (env);
76	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
77	putenv (env);
78	asprintf (&env, "NODEID=%d", THISNODE->id);
79	putenv (env);
80	asprintf (&env, "IFNAME=%s", tap->interface ());	75	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
81	putenv (env);	76	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		77	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
82	asprintf (&env, "MTU=%d", mtu);	78	asprintf (&env, "MTU=%d", mtu); putenv (env);
83	putenv (env);	79	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
84	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	80	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
85	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
86	THISNODE->id & 0xff);
87	putenv (env);
88		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,
89	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;
90	}	112	}
91		113
92	int	114	int
93	vpn::setup ()	115	vpn::setup ()
94	{	116	{
		117	ipv4_tos = -1;
95	ipv4_fd = -1;	118	ipv4_fd = -1;
96		119
97	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	120	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
98	{	121	{
99	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	122	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
100		123
101	if (ipv4_fd < 0)	124	if (ipv4_fd < 0)
102	return -1;	125	return -1;
103		126
104	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	127	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		128	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
105		129
106	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	130	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
107	// this I really consider a linux bug. I am neither connected	131	// this I really consider a linux bug. I am neither connected
108	// 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
109	// fragment for me sometimes.	133	// fragment for me sometimes.
116	sockinfo si (THISNODE, PROT_IPv4);	140	sockinfo si (THISNODE, PROT_IPv4);
117		141
118	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	142	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
119	{	143	{
120	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));
121	exit (1);	145	exit (EXIT_FAILURE);
122	}	146	}
123		147
124	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	148	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
125	}	149	}
126		150
		151	udpv4_tos = -1;
127	udpv4_fd = -1;	152	udpv4_fd = -1;
128		153
129	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	154	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
130	{	155	{
131	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	156	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
132		157
133	if (udpv4_fd < 0)	158	if (udpv4_fd < 0)
134	return -1;	159	return -1;
135		160
136	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	161	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		162	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
137		163
138	// standard daemon practise...	164	// standard daemon practise...
139	{	165	{
140	int oval = 1;	166	int oval = 1;
141	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	167	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
154	sockinfo si (THISNODE, PROT_UDPv4);	180	sockinfo si (THISNODE, PROT_UDPv4);
155		181
156	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	182	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
157	{	183	{
158	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));
159	exit (1);	185	exit (EXIT_FAILURE);
160	}	186	}
161		187
162	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	188	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
163	}	189	}
164		190
		191	icmpv4_tos = -1;
165	icmpv4_fd = -1;	192	icmpv4_fd = -1;
166		193
167	#if ENABLE_ICMP	194	#if ENABLE_ICMP
168	if (THISNODE->protocols & PROT_ICMPv4)	195	if (THISNODE->protocols & PROT_ICMPv4)
169	{	196	{
170	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	197	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
171		198
172	if (icmpv4_fd < 0)	199	if (icmpv4_fd < 0)
173	return -1;	200	return -1;
174		201
175	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	202	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		203	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
176		204
177	#ifdef ICMP_FILTER	205	#ifdef ICMP_FILTER
178	{	206	{
179	icmp_filter oval;	207	icmp_filter oval;
180	oval.data = 0xffffffff;	208	oval.data = 0xffffffff;
…		…
189	// this I really consider a linux bug. I am neither connected	217	// this I really consider a linux bug. I am neither connected
190	// 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
191	// fragment for me sometimes.	219	// fragment for me sometimes.
192	{	220	{
193	int oval = IP_PMTUDISC_DONT;	221	int oval = IP_PMTUDISC_DONT;
194	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	222	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
195	}	223	}
196	#endif	224	#endif
197		225
198	sockinfo si (THISNODE, PROT_ICMPv4);	226	sockinfo si (THISNODE, PROT_ICMPv4);
199		227
200	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	228	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
201	{	229	{
202	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));
203	exit (1);	231	exit (EXIT_FAILURE);
204	}	232	}
205		233
206	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	234	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
207	}	235	}
208	#endif	236	#endif
209		237
210	tcpv4_fd = -1;	238	tcpv4_fd = -1;
211		239
…		…
216		244
217	if (tcpv4_fd < 0)	245	if (tcpv4_fd < 0)
218	return -1;	246	return -1;
219		247
220	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	248	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		249	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
221		250
222	// standard daemon practise...	251	// standard daemon practise...
223	{	252	{
224	int oval = 1;	253	int oval = 1;
225	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	254	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
228	sockinfo si (THISNODE, PROT_TCPv4);	257	sockinfo si (THISNODE, PROT_TCPv4);
229		258
230	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	259	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
231	{	260	{
232	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));
233	exit (1);	262	exit (EXIT_FAILURE);
234	}	263	}
235		264
236	if (listen (tcpv4_fd, 5))	265	if (listen (tcpv4_fd, 5))
237	{	266	{
238	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));
239	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);
240	}	298	}
241
242	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
243	}
244	#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	/////////////////////////////////////////////////////////////////////////////
245		326
246	tap = new tap_device ();	327	tap = new tap_device ();
247	if (!tap) //D this, of course, never catches	328	if (!tap) //D this, of course, never catches
248	{	329	{
249	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	330	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
250	exit (1);	331	exit (EXIT_FAILURE);
251	}	332	}
252		333
253	run_script (run_script_cb (this, &vpn::script_if_up), true);	334	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
254		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
255	tap_ev_watcher.start (tap->fd, POLLIN);	354	tap_ev_watcher.start (tap->fd, EV_READ);
256
257	reconnect_all ();
258		355
259	return 0;	356	return 0;
260	}
261
262	// send a vpn packet out to other hosts
263	bool
264	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
265	{
266	switch (si.prot)
267	{
268	case PROT_IPv4:
269	return send_ipv4_packet (pkt, si, tos);
270
271	case PROT_UDPv4:
272	return send_udpv4_packet (pkt, si, tos);
273
274	#if ENABLE_TCP
275	case PROT_TCPv4:
276	return send_tcpv4_packet (pkt, si, tos);
277	#endif
278
279	#if ENABLE_ICMP
280	case PROT_ICMPv4:
281	return send_icmpv4_packet (pkt, si, tos);
282	#endif
283
284	default:
285	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
286	return false;
287	}
288	}	357	}
289		358
290	bool	359	bool
291	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)
292	{	361	{
293	#if defined(SOL_IP) && defined(IP_TOS)	362	set_tos (ipv4_fd, ipv4_tos, tos);
294	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
295	#endif
296	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 ());
297		364
298	return true;	365	return true;
299	}	366	}
300		367
…		…
320		387
321	return ~sum;	388	return ~sum;
322	}	389	}
323		390
324	#if ENABLE_ICMP	391	#if ENABLE_ICMP
325	struct icmp_header {
326	u8 type;
327	u8 code;
328	u16 checksum;
329	union {
330	struct {
331	u16 id;
332	u16 sequence;
333	} echo;
334	u32 gateway;
335	struct {
336	u16 unused;
337	u16 mtu;
338	} frag;
339	} un;
340	};
341
342	bool	392	bool
343	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)
344	{	394	{
345	#if defined(SOL_IP) && defined(IP_TOS)
346	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
347	#endif
348
349	pkt->unshift_hdr (4);	395	pkt->unshift_hdr (4);
350		396
351	icmp_header hdr = (icmp_header )&((*pkt)[0]);	397	icmp_header hdr = (icmp_header )&((*pkt)[0]);
352	hdr->type = ::conf.icmp_type;	398	hdr->type = ::conf.icmp_type;
353	hdr->code = 255;	399	hdr->code = 255;
354	hdr->checksum = 0;	400	hdr->checksum = 0;
355	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	401	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
356		402
		403	set_tos (icmpv4_fd, icmpv4_tos, tos);
357	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 ());
358		405
359	return true;	406	return true;
360	}	407	}
361	#endif	408	#endif
362		409
363	bool	410	bool
364	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)
365	{	412	{
366	#if defined(SOL_IP) && defined(IP_TOS)	413	set_tos (udpv4_fd, udpv4_tos, tos);
367	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
368	#endif
369	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 ());
370		415
371	return true;	416	return true;
		417	}
		418
		419	void
		420	vpn::inject_data_packet (tap_packet *pkt, int dst)
		421	{
		422	if (dst)
		423	{
		424	// unicast
		425	if (dst != THISNODE->id)
		426	conns[dst - 1]->inject_data_packet (pkt);
		427	}
		428	else
		429	{
		430	// broadcast, this is ugly, but due to the security policy
		431	// we have to connect to all hosts...
		432	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		433	if ((*c)->conf != THISNODE)
		434	(*c)->inject_data_packet (pkt, true);
		435	}
372	}	436	}
373		437
374	void	438	void
375	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	439	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
376	{	440	{
…		…
393	connection *c = conns[src - 1];	457	connection *c = conns[src - 1];
394		458
395	if (dst == 0)	459	if (dst == 0)
396	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	460	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
397	c->conf->nodename, (const char *)rsi);	461	c->conf->nodename, (const char *)rsi);
398	else if (dst != 0 && dst != THISNODE->id)	462	else if (dst != THISNODE->id)
399	{	463	{
400	if (THISNODE->routerprio)	464	if (THISNODE->routerprio)
401	// the tos setting gets lost here. who cares.	465	// the tos setting gets lost here. who cares.
402	conns[dst - 1]->inject_vpn_packet (pkt);	466	conns[dst - 1]->inject_vpn_packet (pkt);
403	else	467	else
…		…
409	else	473	else
410	c->recv_vpn_packet (pkt, rsi);	474	c->recv_vpn_packet (pkt, rsi);
411	}	475	}
412	}	476	}
413		477
414	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
415	vpn::ipv4_ev (io_watcher &w, short revents)	509	vpn::ipv4_ev (ev::io &w, int revents)
416	{	510	{
417	if (revents & (POLLIN \| POLLERR))	511	if (revents & EV_READ)
418	{	512	{
419	vpn_packet *pkt = new vpn_packet;	513	vpn_packet *pkt = new vpn_packet;
420	struct sockaddr_in sa;	514	struct sockaddr_in sa;
421	socklen_t sa_len = sizeof (sa);	515	socklen_t sa_len = sizeof (sa);
422	int len;	516	int len;
…		…
427		521
428	if (len > 0)	522	if (len > 0)
429	{	523	{
430	pkt->len = len;	524	pkt->len = len;
431		525
432	// 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
433	// this is slow, but...
434	pkt->skip_hdr (IP_OVERHEAD);	527	pkt->skip_hdr (IP_OVERHEAD);
435		528
436	recv_vpn_packet (pkt, si);	529	recv_vpn_packet (pkt, si);
437	}	530	}
438	else	531	else
…		…
441	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	534	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
442	}	535	}
443		536
444	delete pkt;	537	delete pkt;
445	}	538	}
446	else if (revents & POLLHUP)
447	{
448	// this cannot ;) happen on udp sockets
449	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
450	exit (1);
451	}
452	else	539	else
453	{	540	{
454	slog (L_ERR,	541	slog (L_ERR,
455	_("FATAL: unknown revents %08x in socket, terminating\n"),	542	_("FATAL: unknown revents %08x in socket, terminating\n"),
456	revents);	543	revents);
457	exit (1);	544	exit (EXIT_FAILURE);
458	}	545	}
459	}	546	}
460		547
461	#if ENABLE_ICMP	548	#if ENABLE_ICMP
462	void	549	inline void
463	vpn::icmpv4_ev (io_watcher &w, short revents)	550	vpn::icmpv4_ev (ev::io &w, int revents)
464	{	551	{
465	if (revents & (POLLIN \| POLLERR))	552	if (revents & EV_READ)
466	{	553	{
467	vpn_packet *pkt = new vpn_packet;	554	vpn_packet *pkt = new vpn_packet;
468	struct sockaddr_in sa;	555	struct sockaddr_in sa;
469	socklen_t sa_len = sizeof (sa);	556	socklen_t sa_len = sizeof (sa);
470	int len;	557	int len;
…		…
495	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	582	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
496	}	583	}
497		584
498	delete pkt;	585	delete pkt;
499	}	586	}
500	else if (revents & POLLHUP)
501	{
502	// this cannot ;) happen on udp sockets
503	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
504	exit (1);
505	}
506	else	587	else
507	{	588	{
508	slog (L_ERR,	589	slog (L_ERR,
509	_("FATAL: unknown revents %08x in socket, terminating\n"),	590	_("FATAL: unknown revents %08x in socket, terminating\n"),
510	revents);	591	revents);
511	exit (1);	592	exit (EXIT_FAILURE);
512	}	593	}
513	}	594	}
514	#endif	595	#endif
515		596
516	void	597	inline void
517	vpn::udpv4_ev (io_watcher &w, short revents)	598	vpn::udpv4_ev (ev::io &w, int revents)
518	{	599	{
519	if (revents & (POLLIN \| POLLERR))	600	if (revents & EV_READ)
520	{	601	{
521	vpn_packet *pkt = new vpn_packet;	602	vpn_packet *pkt = new vpn_packet;
522	struct sockaddr_in sa;	603	struct sockaddr_in sa;
523	socklen_t sa_len = sizeof (sa);	604	socklen_t sa_len = sizeof (sa);
524	int len;	605	int len;
…		…
539	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));
540	}	621	}
541		622
542	delete pkt;	623	delete pkt;
543	}	624	}
544	else if (revents & POLLHUP)
545	{
546	// this cannot ;) happen on udp sockets
547	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
548	exit (1);
549	}
550	else	625	else
551	{	626	{
552	slog (L_ERR,	627	slog (L_ERR,
553	_("FATAL: unknown revents %08x in socket, terminating\n"),	628	_("FATAL: unknown revents %08x in socket, terminating\n"),
554	revents);	629	revents);
555	exit (1);	630	exit (EXIT_FAILURE);
556	}	631	}
557	}	632	}
558		633
559	void	634	inline void
560	vpn::tap_ev (io_watcher &w, short revents)	635	vpn::tap_ev (ev::io &w, int revents)
561	{	636	{
562	if (revents & POLLIN)	637	if (revents & EV_READ)
563	{	638	{
564	/* process data */	639	/* process data */
565	tap_packet *pkt;	640	tap_packet *pkt;
566		641
567	pkt = tap->recv ();	642	pkt = tap->recv ();
568		643
		644	if (!pkt)
		645	return;
		646
		647	if (pkt->len > 14)
		648	{
569	int dst = mac2id (pkt->dst);	649	int dst = mac2id (pkt->dst);
570	int src = mac2id (pkt->src);	650	int src = mac2id (pkt->src);
571		651
572	if (src != THISNODE->id)	652	if (src != THISNODE->id)
573	{
574	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));
575	exit (1);
576	}
577
578	if (dst == THISNODE->id)
579	{
580	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
581	exit (1);
582	}
583
584	if (dst > conns.size ())
585	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
586	else
587	{
588	if (dst)
589	{	653	{
590	// unicast	654	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
591	if (dst != THISNODE->id)	655	exit (EXIT_FAILURE);
592	conns[dst - 1]->inject_data_packet (pkt);
593	}	656	}
		657
		658	if (dst == THISNODE->id)
		659	{
		660	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		661	exit (EXIT_FAILURE);
		662	}
		663
		664	if (dst > conns.size ())
		665	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
594	else	666	else
595	{
596	// broadcast, this is ugly, but due to the security policy
597	// we have to connect to all hosts...
598	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
599	if ((*c)->conf != THISNODE)
600	(*c)->inject_data_packet (pkt);	667	inject_data_packet (pkt, dst);
601	}
602	}	668	}
603		669
604	delete pkt;	670	delete pkt;
605	}
606	else if (revents & (POLLHUP \| POLLERR))
607	{
608	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
609	exit (1);
610	}	671	}
611	else	672	else
612	abort ();	673	abort ();
613	}	674	}
614		675
615	void	676	inline void
616	vpn::event_cb (time_watcher &w)	677	vpn::event_cb (ev::timer &w, int)
617	{	678	{
618	if (events)	679	if (events)
619	{	680	{
620	if (events & EVENT_SHUTDOWN)	681	if (events & EVENT_SHUTDOWN)
621	{	682	{
622	slog (L_INFO, _("preparing shutdown..."));	683	slog (L_INFO, _("preparing shutdown..."));
623		684
624	shutdown_all ();	685	shutdown_all ();
625
626	remove_pid (pidfilename);	686	remove_pid (conf.pidfilename);
627
628	slog (L_INFO, _("terminating"));	687	slog (L_INFO, _("terminating"));
629		688	exit (EXIT_SUCCESS);
630	exit (0);
631	}	689	}
632		690
633	if (events & EVENT_RECONNECT)	691	if (events & EVENT_RECONNECT)
634	{	692	{
635	slog (L_INFO, _("forced reconnect"));	693	slog (L_INFO, _("forced reconnect"));
…		…
637	reconnect_all ();	695	reconnect_all ();
638	}	696	}
639		697
640	events = 0;	698	events = 0;
641	}	699	}
642
643	w.at = TSTAMP_CANCEL;
644	}	700	}
645		701
646	void	702	void
647	vpn::shutdown_all ()	703	vpn::shutdown_all ()
648	{	704	{
…		…
661	connection_init ();	717	connection_init ();
662		718
663	for (configuration::node_vector::iterator i = conf.nodes.begin ();	719	for (configuration::node_vector::iterator i = conf.nodes.begin ();
664	i != conf.nodes.end (); ++i)	720	i != conf.nodes.end (); ++i)
665	{	721	{
666	connection *conn = new connection (this);	722	connection conn = new connection (this, i);
667
668	conn->conf = *i;
669	conns.push_back (conn);	723	conns.push_back (conn);
670
671	conn->establish_connection ();	724	conn->establish_connection ();
672	}	725	}
673	}	726	}
674		727
675	connection *vpn::find_router ()	728	connection *vpn::find_router ()
…		…
720	}	773	}
721		774
722	void	775	void
723	vpn::dump_status ()	776	vpn::dump_status ()
724	{	777	{
725	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	778	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
726		779
727	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	780	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
728	(*c)->dump_status ();	781	(*c)->dump_status ();
729		782
730	slog (L_NOTICE, _("END status dump"));	783	slog (L_NOTICE, _("END status dump"));
731	}	784	}
732		785
733	vpn::vpn (void)	786	vpn::vpn (void)
		787	{
734	: event (this, &vpn::event_cb)	788	event .set<vpn, &vpn::event_cb > (this);
735	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	789	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
736	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	790	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
737	#if ENABLE_TCP	791	#if ENABLE_TCP
738	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	792	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
739	#endif	793	#endif
740	#if ENABLE_ICMP	794	#if ENABLE_ICMP
741	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	795	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
742	#endif	796	#endif
743	, tap_ev_watcher (this, &vpn::tap_ev)	797	#if ENABLE_DNS
744	{	798	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		799	#endif
		800	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
745	}	801	}
746		802
747	vpn::~vpn ()	803	vpn::~vpn ()
748	{	804	{
749	}	805	}

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Comparing gvpe/src/vpn.C (file contents): Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs. Revision 1.45 by pcg, Thu Dec 6 00:35:29 2007 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.14 by pcg, Tue Oct 14 03:22:09 2003 UTC vs.
Revision 1.45 by pcg, Thu Dec 6 00:35:29 2007 UTC