[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 1.44 by pcg, Tue Dec 4 17:17:20 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	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,
89	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;
90	}	110	}
91		111
92	int	112	int
93	vpn::setup ()	113	vpn::setup ()
94	{	114	{
		115	ipv4_tos = -1;
95	ipv4_fd = -1;	116	ipv4_fd = -1;
96		117
97	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	118	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
98	{	119	{
99	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	120	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
100		121
101	if (ipv4_fd < 0)	122	if (ipv4_fd < 0)
102	return -1;	123	return -1;
103		124
104	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	125	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		126	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
105		127
106	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	128	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
107	// this I really consider a linux bug. I am neither connected	129	// this I really consider a linux bug. I am neither connected
108	// 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
109	// fragment for me sometimes.	131	// fragment for me sometimes.
116	sockinfo si (THISNODE, PROT_IPv4);	138	sockinfo si (THISNODE, PROT_IPv4);
117		139
118	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	140	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
119	{	141	{
120	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));
121	exit (1);	143	exit (EXIT_FAILURE);
122	}	144	}
123		145
124	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	146	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
125	}	147	}
126		148
		149	udpv4_tos = -1;
127	udpv4_fd = -1;	150	udpv4_fd = -1;
128		151
129	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	152	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
130	{	153	{
131	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	154	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
132		155
133	if (udpv4_fd < 0)	156	if (udpv4_fd < 0)
134	return -1;	157	return -1;
135		158
136	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	159	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		160	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
137		161
138	// standard daemon practise...	162	// standard daemon practise...
139	{	163	{
140	int oval = 1;	164	int oval = 1;
141	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	165	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
154	sockinfo si (THISNODE, PROT_UDPv4);	178	sockinfo si (THISNODE, PROT_UDPv4);
155		179
156	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	180	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
157	{	181	{
158	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));
159	exit (1);	183	exit (EXIT_FAILURE);
160	}	184	}
161		185
162	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	186	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
163	}	187	}
164		188
		189	icmpv4_tos = -1;
165	icmpv4_fd = -1;	190	icmpv4_fd = -1;
166		191
167	#if ENABLE_ICMP	192	#if ENABLE_ICMP
168	if (THISNODE->protocols & PROT_ICMPv4)	193	if (THISNODE->protocols & PROT_ICMPv4)
169	{	194	{
170	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	195	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
171		196
172	if (icmpv4_fd < 0)	197	if (icmpv4_fd < 0)
173	return -1;	198	return -1;
174		199
175	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	200	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		201	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
176		202
177	#ifdef ICMP_FILTER	203	#ifdef ICMP_FILTER
178	{	204	{
179	icmp_filter oval;	205	icmp_filter oval;
180	oval.data = 0xffffffff;	206	oval.data = 0xffffffff;
…		…
189	// this I really consider a linux bug. I am neither connected	215	// this I really consider a linux bug. I am neither connected
190	// 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
191	// fragment for me sometimes.	217	// fragment for me sometimes.
192	{	218	{
193	int oval = IP_PMTUDISC_DONT;	219	int oval = IP_PMTUDISC_DONT;
194	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	220	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
195	}	221	}
196	#endif	222	#endif
197		223
198	sockinfo si (THISNODE, PROT_ICMPv4);	224	sockinfo si (THISNODE, PROT_ICMPv4);
199		225
200	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	226	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
201	{	227	{
202	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));
203	exit (1);	229	exit (EXIT_FAILURE);
204	}	230	}
205		231
206	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	232	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
207	}	233	}
208	#endif	234	#endif
209		235
210	tcpv4_fd = -1;	236	tcpv4_fd = -1;
211		237
…		…
216		242
217	if (tcpv4_fd < 0)	243	if (tcpv4_fd < 0)
218	return -1;	244	return -1;
219		245
220	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	246	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		247	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
221		248
222	// standard daemon practise...	249	// standard daemon practise...
223	{	250	{
224	int oval = 1;	251	int oval = 1;
225	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	252	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
228	sockinfo si (THISNODE, PROT_TCPv4);	255	sockinfo si (THISNODE, PROT_TCPv4);
229		256
230	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	257	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
231	{	258	{
232	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));
233	exit (1);	260	exit (EXIT_FAILURE);
234	}	261	}
235		262
236	if (listen (tcpv4_fd, 5))	263	if (listen (tcpv4_fd, 5))
237	{	264	{
238	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));
239	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);
240	}	296	}
241
242	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
243	}
244	#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	/////////////////////////////////////////////////////////////////////////////
245		324
246	tap = new tap_device ();	325	tap = new tap_device ();
247	if (!tap) //D this, of course, never catches	326	if (!tap) //D this, of course, never catches
248	{	327	{
249	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	328	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
250	exit (1);	329	exit (EXIT_FAILURE);
251	}	330	}
252		331
253	run_script (run_script_cb (this, &vpn::script_if_up), true);	332	fcntl (tap->fd, F_SETFD, FD_CLOEXEC);
254		333
		334	run_script_cb cb;
		335	cb.set<vpn, &vpn::script_if_init> (this);
		336
		337	if (tap->if_up () &&
		338	!run_script (cb, true))
		339	{
		340	slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
		341	tap->if_up ());
		342	exit (EXIT_FAILURE);
		343	}
		344
		345	cb.set<vpn, &vpn::script_if_up> (this);
		346	if (!run_script (cb, true))
		347	{
		348	slog (L_ERR, _("if-up command execution failed, exiting."));
		349	exit (EXIT_FAILURE);
		350	}
		351
255	tap_ev_watcher.start (tap->fd, POLLIN);	352	tap_ev_watcher.start (tap->fd, EV_READ);
256
257	reconnect_all ();
258		353
259	return 0;	354	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	}	355	}
289		356
290	bool	357	bool
291	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	358	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
292	{	359	{
293	#if defined(SOL_IP) && defined(IP_TOS)	360	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 ());	361	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
297		362
298	return true;	363	return true;
299	}	364	}
300		365
…		…
320		385
321	return ~sum;	386	return ~sum;
322	}	387	}
323		388
324	#if ENABLE_ICMP	389	#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	390	bool
343	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	391	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
344	{	392	{
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);	393	pkt->unshift_hdr (4);
350		394
351	icmp_header hdr = (icmp_header )&((*pkt)[0]);	395	icmp_header hdr = (icmp_header )&((*pkt)[0]);
352	hdr->type = ::conf.icmp_type;	396	hdr->type = ::conf.icmp_type;
353	hdr->code = 255;	397	hdr->code = 255;
354	hdr->checksum = 0;	398	hdr->checksum = 0;
355	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	399	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
356		400
		401	set_tos (icmpv4_fd, icmpv4_tos, tos);
357	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	402	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
358		403
359	return true;	404	return true;
360	}	405	}
361	#endif	406	#endif
362		407
363	bool	408	bool
364	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	409	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
365	{	410	{
366	#if defined(SOL_IP) && defined(IP_TOS)	411	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 ());	412	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
370		413
371	return true;	414	return true;
		415	}
		416
		417	void
		418	vpn::inject_data_packet (tap_packet *pkt, int dst)
		419	{
		420	if (dst)
		421	{
		422	// unicast
		423	if (dst != THISNODE->id)
		424	conns[dst - 1]->inject_data_packet (pkt);
		425	}
		426	else
		427	{
		428	// broadcast, this is ugly, but due to the security policy
		429	// we have to connect to all hosts...
		430	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		431	if ((*c)->conf != THISNODE)
		432	(*c)->inject_data_packet (pkt, true);
		433	}
372	}	434	}
373		435
374	void	436	void
375	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	437	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
376	{	438	{
…		…
393	connection *c = conns[src - 1];	455	connection *c = conns[src - 1];
394		456
395	if (dst == 0)	457	if (dst == 0)
396	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),	458	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
397	c->conf->nodename, (const char *)rsi);	459	c->conf->nodename, (const char *)rsi);
398	else if (dst != 0 && dst != THISNODE->id)	460	else if (dst != THISNODE->id)
399	{	461	{
400	if (THISNODE->routerprio)	462	if (THISNODE->routerprio)
401	// the tos setting gets lost here. who cares.	463	// the tos setting gets lost here. who cares.
402	conns[dst - 1]->inject_vpn_packet (pkt);	464	conns[dst - 1]->inject_vpn_packet (pkt);
403	else	465	else
…		…
409	else	471	else
410	c->recv_vpn_packet (pkt, rsi);	472	c->recv_vpn_packet (pkt, rsi);
411	}	473	}
412	}	474	}
413		475
		476	bool
		477	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		478	{
		479	switch (si.prot)
		480	{
		481	case PROT_IPv4:
		482	return send_ipv4_packet (pkt, si, tos);
		483
		484	case PROT_UDPv4:
		485	return send_udpv4_packet (pkt, si, tos);
		486
		487	#if ENABLE_TCP
		488	case PROT_TCPv4:
		489	return send_tcpv4_packet (pkt, si, tos);
		490	#endif
		491	#if ENABLE_ICMP
		492	case PROT_ICMPv4:
		493	return send_icmpv4_packet (pkt, si, tos);
		494	#endif
		495	#if ENABLE_DNS
		496	case PROT_DNSv4:
		497	return send_dnsv4_packet (pkt, si, tos);
		498	#endif
		499	default:
		500	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
		501	}
		502
		503	return false;
		504	}
		505
414	void	506	void
415	vpn::ipv4_ev (io_watcher &w, short revents)	507	vpn::ipv4_ev (ev::io &w, int revents)
416	{	508	{
417	if (revents & (POLLIN \| POLLERR))	509	if (revents & EV_READ)
418	{	510	{
419	vpn_packet *pkt = new vpn_packet;	511	vpn_packet *pkt = new vpn_packet;
420	struct sockaddr_in sa;	512	struct sockaddr_in sa;
421	socklen_t sa_len = sizeof (sa);	513	socklen_t sa_len = sizeof (sa);
422	int len;	514	int len;
…		…
427		519
428	if (len > 0)	520	if (len > 0)
429	{	521	{
430	pkt->len = len;	522	pkt->len = len;
431		523
432	// raw sockets deliver the ipv4, but don't expect it on sends	524	// raw sockets deliver the ipv4 header, but don't expect it on sends
433	// this is slow, but...
434	pkt->skip_hdr (IP_OVERHEAD);	525	pkt->skip_hdr (IP_OVERHEAD);
435		526
436	recv_vpn_packet (pkt, si);	527	recv_vpn_packet (pkt, si);
437	}	528	}
438	else	529	else
…		…
441	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	532	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
442	}	533	}
443		534
444	delete pkt;	535	delete pkt;
445	}	536	}
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	537	else
453	{	538	{
454	slog (L_ERR,	539	slog (L_ERR,
455	_("FATAL: unknown revents %08x in socket, terminating\n"),	540	_("FATAL: unknown revents %08x in socket, terminating\n"),
456	revents);	541	revents);
457	exit (1);	542	exit (EXIT_FAILURE);
458	}	543	}
459	}	544	}
460		545
461	#if ENABLE_ICMP	546	#if ENABLE_ICMP
462	void	547	void
463	vpn::icmpv4_ev (io_watcher &w, short revents)	548	vpn::icmpv4_ev (ev::io &w, int revents)
464	{	549	{
465	if (revents & (POLLIN \| POLLERR))	550	if (revents & EV_READ)
466	{	551	{
467	vpn_packet *pkt = new vpn_packet;	552	vpn_packet *pkt = new vpn_packet;
468	struct sockaddr_in sa;	553	struct sockaddr_in sa;
469	socklen_t sa_len = sizeof (sa);	554	socklen_t sa_len = sizeof (sa);
470	int len;	555	int len;
…		…
495	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	580	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
496	}	581	}
497		582
498	delete pkt;	583	delete pkt;
499	}	584	}
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	585	else
507	{	586	{
508	slog (L_ERR,	587	slog (L_ERR,
509	_("FATAL: unknown revents %08x in socket, terminating\n"),	588	_("FATAL: unknown revents %08x in socket, terminating\n"),
510	revents);	589	revents);
511	exit (1);	590	exit (EXIT_FAILURE);
512	}	591	}
513	}	592	}
514	#endif	593	#endif
515		594
516	void	595	void
517	vpn::udpv4_ev (io_watcher &w, short revents)	596	vpn::udpv4_ev (ev::io &w, int revents)
518	{	597	{
519	if (revents & (POLLIN \| POLLERR))	598	if (revents & EV_READ)
520	{	599	{
521	vpn_packet *pkt = new vpn_packet;	600	vpn_packet *pkt = new vpn_packet;
522	struct sockaddr_in sa;	601	struct sockaddr_in sa;
523	socklen_t sa_len = sizeof (sa);	602	socklen_t sa_len = sizeof (sa);
524	int len;	603	int len;
…		…
539	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	618	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
540	}	619	}
541		620
542	delete pkt;	621	delete pkt;
543	}	622	}
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	623	else
551	{	624	{
552	slog (L_ERR,	625	slog (L_ERR,
553	_("FATAL: unknown revents %08x in socket, terminating\n"),	626	_("FATAL: unknown revents %08x in socket, terminating\n"),
554	revents);	627	revents);
555	exit (1);	628	exit (EXIT_FAILURE);
556	}	629	}
557	}	630	}
558		631
559	void	632	void
560	vpn::tap_ev (io_watcher &w, short revents)	633	vpn::tap_ev (ev::io &w, int revents)
561	{	634	{
562	if (revents & POLLIN)	635	if (revents & EV_READ)
563	{	636	{
564	/* process data */	637	/* process data */
565	tap_packet *pkt;	638	tap_packet *pkt;
566		639
567	pkt = tap->recv ();	640	pkt = tap->recv ();
568		641
		642	if (!pkt)
		643	return;
		644
		645	if (pkt->len > 14)
		646	{
569	int dst = mac2id (pkt->dst);	647	int dst = mac2id (pkt->dst);
570	int src = mac2id (pkt->src);	648	int src = mac2id (pkt->src);
571		649
572	if (src != THISNODE->id)	650	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	{	651	{
590	// unicast	652	slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
591	if (dst != THISNODE->id)	653	exit (EXIT_FAILURE);
592	conns[dst - 1]->inject_data_packet (pkt);
593	}	654	}
		655
		656	if (dst == THISNODE->id)
		657	{
		658	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		659	exit (EXIT_FAILURE);
		660	}
		661
		662	if (dst > conns.size ())
		663	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
594	else	664	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);	665	inject_data_packet (pkt, dst);
601	}
602	}	666	}
603		667
604	delete pkt;	668	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	}	669	}
611	else	670	else
612	abort ();	671	abort ();
613	}	672	}
614		673
615	void	674	void
616	vpn::event_cb (time_watcher &w)	675	vpn::event_cb (ev::timer &w, int)
617	{	676	{
618	if (events)	677	if (events)
619	{	678	{
620	if (events & EVENT_SHUTDOWN)	679	if (events & EVENT_SHUTDOWN)
621	{	680	{
622	slog (L_INFO, _("preparing shutdown..."));	681	slog (L_INFO, _("preparing shutdown..."));
623		682
624	shutdown_all ();	683	shutdown_all ();
625
626	remove_pid (pidfilename);	684	remove_pid (conf.pidfilename);
627
628	slog (L_INFO, _("terminating"));	685	slog (L_INFO, _("terminating"));
629		686	exit (EXIT_SUCCESS);
630	exit (0);
631	}	687	}
632		688
633	if (events & EVENT_RECONNECT)	689	if (events & EVENT_RECONNECT)
634	{	690	{
635	slog (L_INFO, _("forced reconnect"));	691	slog (L_INFO, _("forced reconnect"));
…		…
637	reconnect_all ();	693	reconnect_all ();
638	}	694	}
639		695
640	events = 0;	696	events = 0;
641	}	697	}
642
643	w.at = TSTAMP_CANCEL;
644	}	698	}
645		699
646	void	700	void
647	vpn::shutdown_all ()	701	vpn::shutdown_all ()
648	{	702	{
…		…
661	connection_init ();	715	connection_init ();
662		716
663	for (configuration::node_vector::iterator i = conf.nodes.begin ();	717	for (configuration::node_vector::iterator i = conf.nodes.begin ();
664	i != conf.nodes.end (); ++i)	718	i != conf.nodes.end (); ++i)
665	{	719	{
666	connection *conn = new connection (this);	720	connection conn = new connection (this, i);
667
668	conn->conf = *i;
669	conns.push_back (conn);	721	conns.push_back (conn);
670
671	conn->establish_connection ();	722	conn->establish_connection ();
672	}	723	}
673	}	724	}
674		725
675	connection *vpn::find_router ()	726	connection *vpn::find_router ()
…		…
720	}	771	}
721		772
722	void	773	void
723	vpn::dump_status ()	774	vpn::dump_status ()
724	{	775	{
725	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	776	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
726		777
727	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	778	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
728	(*c)->dump_status ();	779	(*c)->dump_status ();
729		780
730	slog (L_NOTICE, _("END status dump"));	781	slog (L_NOTICE, _("END status dump"));
731	}	782	}
732		783
733	vpn::vpn (void)	784	vpn::vpn (void)
		785	{
734	: event (this, &vpn::event_cb)	786	event .set<vpn, &vpn::event_cb > (this);
735	, udpv4_ev_watcher (this, &vpn::udpv4_ev)	787	udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this);
736	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	788	ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this);
737	#if ENABLE_TCP	789	#if ENABLE_TCP
738	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	790	tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this);
739	#endif	791	#endif
740	#if ENABLE_ICMP	792	#if ENABLE_ICMP
741	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	793	icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this);
742	#endif	794	#endif
743	, tap_ev_watcher (this, &vpn::tap_ev)	795	#if ENABLE_DNS
744	{	796	dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this);
		797	#endif
		798	tap_ev_watcher .set<vpn, &vpn::tap_ev > (this);
745	}	799	}
746		800
747	vpn::~vpn ()	801	vpn::~vpn ()
748	{	802	{
749	}	803	}

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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 1.44 by pcg, Tue Dec 4 17:17:20 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 1.44 by pcg, Tue Dec 4 17:17:20 2007 UTC