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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs.
Revision 1.42 by pcg, Sun Dec 2 00:54:52 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 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);	74	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
60	putenv (env);
61	asprintf (&env, "NODENAME=%s", THISNODE->nodename);
62	putenv (env);
63	asprintf (&env, "NODEID=%d", THISNODE->id);
64	putenv (env);
65	asprintf (&env, "IFNAME=%s", tap->interface ());	75	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
66	putenv (env);	76	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		77	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
67	asprintf (&env, "MTU=%d", mtu);	78	asprintf (&env, "MTU=%d", mtu); putenv (env);
68	putenv (env);	79	asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
69	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	80	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
70	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
71	THISNODE->id & 0xff);
72	putenv (env);
73		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,
74	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;
75	}	110	}
76		111
77	int	112	int
78	vpn::setup ()	113	vpn::setup ()
79	{	114	{
		115	ipv4_tos = -1;
80	ipv4_fd = -1;	116	ipv4_fd = -1;
81		117
82	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)	118	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
83	{	119	{
84	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	120	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
85		121
86	if (ipv4_fd < 0)	122	if (ipv4_fd < 0)
87	return -1;	123	return -1;
88		124
89	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);	125	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		126	fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC);
90		127
91	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)	128	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
92	// this I really consider a linux bug. I am neither connected	129	// this I really consider a linux bug. I am neither connected
93	// 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
94	// fragment for me sometimes.	131	// fragment for me sometimes.
…		…
101	sockinfo si (THISNODE, PROT_IPv4);	138	sockinfo si (THISNODE, PROT_IPv4);
102		139
103	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	140	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
104	{	141	{
105	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));
106	exit (1);	143	exit (EXIT_FAILURE);
107	}	144	}
108		145
109	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	146	ipv4_ev_watcher.start (ipv4_fd, EV_READ);
110	}	147	}
111		148
		149	udpv4_tos = -1;
112	udpv4_fd = -1;	150	udpv4_fd = -1;
113		151
114	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	152	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
115	{	153	{
116	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	154	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
117		155
118	if (udpv4_fd < 0)	156	if (udpv4_fd < 0)
119	return -1;	157	return -1;
120		158
121	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);	159	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
		160	fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC);
122		161
123	// standard daemon practise...	162	// standard daemon practise...
124	{	163	{
125	int oval = 1;	164	int oval = 1;
126	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	165	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
139	sockinfo si (THISNODE, PROT_UDPv4);	178	sockinfo si (THISNODE, PROT_UDPv4);
140		179
141	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	180	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
142	{	181	{
143	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));
144	exit (1);	183	exit (EXIT_FAILURE);
145	}	184	}
146		185
147	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	186	udpv4_ev_watcher.start (udpv4_fd, EV_READ);
148	}	187	}
149		188
		189	icmpv4_tos = -1;
150	icmpv4_fd = -1;	190	icmpv4_fd = -1;
151		191
152	#if ENABLE_ICMP	192	#if ENABLE_ICMP
153	if (THISNODE->protocols & PROT_ICMPv4)	193	if (THISNODE->protocols & PROT_ICMPv4)
154	{	194	{
155	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	195	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
156		196
157	if (icmpv4_fd < 0)	197	if (icmpv4_fd < 0)
158	return -1;	198	return -1;
159		199
160	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);	200	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		201	fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC);
161		202
162	#ifdef ICMP_FILTER	203	#ifdef ICMP_FILTER
163	{	204	{
164	icmp_filter oval;	205	icmp_filter oval;
165	oval.data = 0xffffffff;	206	oval.data = 0xffffffff;
…		…
174	// this I really consider a linux bug. I am neither connected	215	// this I really consider a linux bug. I am neither connected
175	// 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
176	// fragment for me sometimes.	217	// fragment for me sometimes.
177	{	218	{
178	int oval = IP_PMTUDISC_DONT;	219	int oval = IP_PMTUDISC_DONT;
179	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	220	setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
180	}	221	}
181	#endif	222	#endif
182		223
183	sockinfo si (THISNODE, PROT_ICMPv4);	224	sockinfo si (THISNODE, PROT_ICMPv4);
184		225
185	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	226	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
186	{	227	{
187	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));
188	exit (1);	229	exit (EXIT_FAILURE);
189	}	230	}
190		231
191	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	232	icmpv4_ev_watcher.start (icmpv4_fd, EV_READ);
192	}	233	}
193	#endif	234	#endif
194		235
195	tcpv4_fd = -1;	236	tcpv4_fd = -1;
196		237
…		…
201		242
202	if (tcpv4_fd < 0)	243	if (tcpv4_fd < 0)
203	return -1;	244	return -1;
204		245
205	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);	246	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
		247	fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC);
206		248
207	// standard daemon practise...	249	// standard daemon practise...
208	{	250	{
209	int oval = 1;	251	int oval = 1;
210	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	252	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
213	sockinfo si (THISNODE, PROT_TCPv4);	255	sockinfo si (THISNODE, PROT_TCPv4);
214		256
215	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	257	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
216	{	258	{
217	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));
218	exit (1);	260	exit (EXIT_FAILURE);
219	}	261	}
220		262
221	if (listen (tcpv4_fd, 5))	263	if (listen (tcpv4_fd, 5))
222	{	264	{
223	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));
224	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);
225	}	296	}
226
227	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
228	}
229	#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	/////////////////////////////////////////////////////////////////////////////
230		324
231	tap = new tap_device ();	325	tap = new tap_device ();
232	if (!tap) //D this, of course, never catches	326	if (!tap) //D this, of course, never catches
233	{	327	{
234	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	328	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
235	exit (1);	329	exit (EXIT_FAILURE);
236	}	330	}
237		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
238	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	}
239		347
240	tap_ev_watcher.start (tap->fd, POLLIN);	348	tap_ev_watcher.start (tap->fd, EV_READ);
241
242	reconnect_all ();
243		349
244	return 0;	350	return 0;
245	}
246
247	// send a vpn packet out to other hosts
248	bool
249	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
250	{
251	switch (si.prot)
252	{
253	case PROT_IPv4:
254	return send_ipv4_packet (pkt, si, tos);
255
256	case PROT_UDPv4:
257	return send_udpv4_packet (pkt, si, tos);
258
259	#if ENABLE_TCP
260	case PROT_TCPv4:
261	return send_tcpv4_packet (pkt, si, tos);
262	#endif
263
264	#if ENABLE_ICMP
265	case PROT_ICMPv4:
266	return send_icmpv4_packet (pkt, si, tos);
267	#endif
268
269	default:
270	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
271	return false;
272	}
273	}	351	}
274		352
275	bool	353	bool
276	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)
277	{	355	{
278	#if defined(SOL_IP) && defined(IP_TOS)	356	set_tos (ipv4_fd, ipv4_tos, tos);
279	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
280	#endif
281	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 ());
282		358
283	return true;	359	return true;
284	}	360	}
285		361
…		…
308		384
309	#if ENABLE_ICMP	385	#if ENABLE_ICMP
310	bool	386	bool
311	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)
312	{	388	{
313	#if defined(SOL_IP) && defined(IP_TOS)
314	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
315	#endif
316
317	pkt->unshift_hdr (4);	389	pkt->unshift_hdr (4);
318		390
319	icmp_header hdr = (icmp_header )&((*pkt)[0]);	391	icmp_header hdr = (icmp_header )&((*pkt)[0]);
320	hdr->type = ::conf.icmp_type;	392	hdr->type = ::conf.icmp_type;
321	hdr->code = 255;	393	hdr->code = 255;
322	hdr->checksum = 0;	394	hdr->checksum = 0;
323	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	395	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
324		396
		397	set_tos (icmpv4_fd, icmpv4_tos, tos);
325	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 ());
326		399
327	return true;	400	return true;
328	}	401	}
329	#endif	402	#endif
330		403
331	bool	404	bool
332	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)
333	{	406	{
334	#if defined(SOL_IP) && defined(IP_TOS)	407	set_tos (udpv4_fd, udpv4_tos, tos);
335	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
336	#endif
337	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 ());
338		409
339	return true;	410	return true;
340	}	411	}
341		412
…		…
396	else	467	else
397	c->recv_vpn_packet (pkt, rsi);	468	c->recv_vpn_packet (pkt, rsi);
398	}	469	}
399	}	470	}
400		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
401	void	502	void
402	vpn::ipv4_ev (io_watcher &w, short revents)	503	vpn::ipv4_ev (ev::io &w, int revents)
403	{	504	{
404	if (revents & (POLLIN \| POLLERR))	505	if (revents & EV_READ)
405	{	506	{
406	vpn_packet *pkt = new vpn_packet;	507	vpn_packet *pkt = new vpn_packet;
407	struct sockaddr_in sa;	508	struct sockaddr_in sa;
408	socklen_t sa_len = sizeof (sa);	509	socklen_t sa_len = sizeof (sa);
409	int len;	510	int len;
…		…
414		515
415	if (len > 0)	516	if (len > 0)
416	{	517	{
417	pkt->len = len;	518	pkt->len = len;
418		519
419	// 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
420	// this is slow, but...
421	pkt->skip_hdr (IP_OVERHEAD);	521	pkt->skip_hdr (IP_OVERHEAD);
422		522
423	recv_vpn_packet (pkt, si);	523	recv_vpn_packet (pkt, si);
424	}	524	}
425	else	525	else
…		…
428	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	528	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
429	}	529	}
430		530
431	delete pkt;	531	delete pkt;
432	}	532	}
433	else if (revents & POLLHUP)
434	{
435	// this cannot ;) happen on udp sockets
436	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
437	exit (1);
438	}
439	else	533	else
440	{	534	{
441	slog (L_ERR,	535	slog (L_ERR,
442	_("FATAL: unknown revents %08x in socket, terminating\n"),	536	_("FATAL: unknown revents %08x in socket, terminating\n"),
443	revents);	537	revents);
444	exit (1);	538	exit (EXIT_FAILURE);
445	}	539	}
446	}	540	}
447		541
448	#if ENABLE_ICMP	542	#if ENABLE_ICMP
449	void	543	void
450	vpn::icmpv4_ev (io_watcher &w, short revents)	544	vpn::icmpv4_ev (ev::io &w, int revents)
451	{	545	{
452	if (revents & (POLLIN \| POLLERR))	546	if (revents & EV_READ)
453	{	547	{
454	vpn_packet *pkt = new vpn_packet;	548	vpn_packet *pkt = new vpn_packet;
455	struct sockaddr_in sa;	549	struct sockaddr_in sa;
456	socklen_t sa_len = sizeof (sa);	550	socklen_t sa_len = sizeof (sa);
457	int len;	551	int len;
…		…
482	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	576	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
483	}	577	}
484		578
485	delete pkt;	579	delete pkt;
486	}	580	}
487	else if (revents & POLLHUP)
488	{
489	// this cannot ;) happen on udp sockets
490	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
491	exit (1);
492	}
493	else	581	else
494	{	582	{
495	slog (L_ERR,	583	slog (L_ERR,
496	_("FATAL: unknown revents %08x in socket, terminating\n"),	584	_("FATAL: unknown revents %08x in socket, terminating\n"),
497	revents);	585	revents);
498	exit (1);	586	exit (EXIT_FAILURE);
499	}	587	}
500	}	588	}
501	#endif	589	#endif
502		590
503	void	591	void
504	vpn::udpv4_ev (io_watcher &w, short revents)	592	vpn::udpv4_ev (ev::io &w, int revents)
505	{	593	{
506	if (revents & (POLLIN \| POLLERR))	594	if (revents & EV_READ)
507	{	595	{
508	vpn_packet *pkt = new vpn_packet;	596	vpn_packet *pkt = new vpn_packet;
509	struct sockaddr_in sa;	597	struct sockaddr_in sa;
510	socklen_t sa_len = sizeof (sa);	598	socklen_t sa_len = sizeof (sa);
511	int len;	599	int len;
…		…
526	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));
527	}	615	}
528		616
529	delete pkt;	617	delete pkt;
530	}	618	}
531	else if (revents & POLLHUP)
532	{
533	// this cannot ;) happen on udp sockets
534	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
535	exit (1);
536	}
537	else	619	else
538	{	620	{
539	slog (L_ERR,	621	slog (L_ERR,
540	_("FATAL: unknown revents %08x in socket, terminating\n"),	622	_("FATAL: unknown revents %08x in socket, terminating\n"),
541	revents);	623	revents);
542	exit (1);	624	exit (EXIT_FAILURE);
543	}	625	}
544	}	626	}
545		627
546	void	628	void
547	vpn::tap_ev (io_watcher &w, short revents)	629	vpn::tap_ev (ev::io &w, int revents)
548	{	630	{
549	if (revents & POLLIN)	631	if (revents & EV_READ)
550	{	632	{
551	/* process data */	633	/* process data */
552	tap_packet *pkt;	634	tap_packet *pkt;
553		635
554	pkt = tap->recv ();	636	pkt = tap->recv ();
…		…
561	int dst = mac2id (pkt->dst);	643	int dst = mac2id (pkt->dst);
562	int src = mac2id (pkt->src);	644	int src = mac2id (pkt->src);
563		645
564	if (src != THISNODE->id)	646	if (src != THISNODE->id)
565	{	647	{
566	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."));
567	exit (1);	649	exit (EXIT_FAILURE);
568	}	650	}
569		651
570	if (dst == THISNODE->id)	652	if (dst == THISNODE->id)
571	{	653	{
572	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."));
573	exit (1);	655	exit (EXIT_FAILURE);
574	}	656	}
575		657
576	if (dst > conns.size ())	658	if (dst > conns.size ())
577	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);
578	else	660	else
579	inject_data_packet (pkt, dst);	661	inject_data_packet (pkt, dst);
580	}	662	}
581		663
582	delete pkt;	664	delete pkt;
583	}	665	}
584	else if (revents & (POLLHUP \| POLLERR))
585	{
586	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
587	exit (1);
588	}
589	else	666	else
590	abort ();	667	abort ();
591	}	668	}
592		669
593	void	670	void
594	vpn::event_cb (time_watcher &w)	671	vpn::event_cb (ev::timer &w, int)
595	{	672	{
596	if (events)	673	if (events)
597	{	674	{
598	if (events & EVENT_SHUTDOWN)	675	if (events & EVENT_SHUTDOWN)
599	{	676	{
600	slog (L_INFO, _("preparing shutdown..."));	677	slog (L_INFO, _("preparing shutdown..."));
601		678
602	shutdown_all ();	679	shutdown_all ();
603
604	remove_pid (pidfilename);	680	remove_pid (conf.pidfilename);
605
606	slog (L_INFO, _("terminating"));	681	slog (L_INFO, _("terminating"));
607		682	exit (EXIT_SUCCESS);
608	exit (0);
609	}	683	}
610		684
611	if (events & EVENT_RECONNECT)	685	if (events & EVENT_RECONNECT)
612	{	686	{
613	slog (L_INFO, _("forced reconnect"));	687	slog (L_INFO, _("forced reconnect"));
…		…
615	reconnect_all ();	689	reconnect_all ();
616	}	690	}
617		691
618	events = 0;	692	events = 0;
619	}	693	}
620
621	w.at = TSTAMP_CANCEL;
622	}	694	}
623		695
624	void	696	void
625	vpn::shutdown_all ()	697	vpn::shutdown_all ()
626	{	698	{
…		…
639	connection_init ();	711	connection_init ();
640		712
641	for (configuration::node_vector::iterator i = conf.nodes.begin ();	713	for (configuration::node_vector::iterator i = conf.nodes.begin ();
642	i != conf.nodes.end (); ++i)	714	i != conf.nodes.end (); ++i)
643	{	715	{
644	connection *conn = new connection (this);	716	connection conn = new connection (this, i);
645
646	conn->conf = *i;
647	conns.push_back (conn);	717	conns.push_back (conn);
648
649	conn->establish_connection ();	718	conn->establish_connection ();
650	}	719	}
651	}	720	}
652		721
653	connection *vpn::find_router ()	722	connection *vpn::find_router ()
…		…
698	}	767	}
699		768
700	void	769	void
701	vpn::dump_status ()	770	vpn::dump_status ()
702	{	771	{
703	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW);	772	slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ());
704		773
705	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	774	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
706	(*c)->dump_status ();	775	(*c)->dump_status ();
707		776
708	slog (L_NOTICE, _("END status dump"));	777	slog (L_NOTICE, _("END status dump"));
…		…
716	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	785	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
717	#endif	786	#endif
718	#if ENABLE_ICMP	787	#if ENABLE_ICMP
719	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	788	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
720	#endif	789	#endif
		790	#if ENABLE_DNS
		791	, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)
		792	#endif
721	, tap_ev_watcher (this, &vpn::tap_ev)	793	, tap_ev_watcher (this, &vpn::tap_ev)
722	{	794	{
723	}	795	}
724		796
725	vpn::~vpn ()	797	vpn::~vpn ()

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Comparing gvpe/src/vpn.C (file contents): Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs. Revision 1.42 by pcg, Sun Dec 2 00:54:52 2007 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs.
Revision 1.42 by pcg, Sun Dec 2 00:54:52 2007 UTC