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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.10 by pcg, Tue Apr 8 03:25:35 2003 UTC vs.
Revision 1.27 by pcg, Tue Mar 1 06:27:20 2005 UTC

…		…
1	/*	1	/*
2	vpn.C -- handle the protocol, encryption, handshaking etc.	2	vpn.C -- handle the protocol, encryption, handshaking etc.
		3	Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com>
3		4
4	This program is free software; you can redistribute it and/or modify	5	This program is free software; you can redistribute it and/or modify
5	it under the terms of the GNU General Public License as published by	6	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	7	the Free Software Foundation; either version 2 of the License, or
7	(at your option) any later version.	8	(at your option) any later version.
18		19
19	#include "config.h"	20	#include "config.h"
20		21
21	#include <list>	22	#include <list>
22		23
		24	#include <cstdio>
		25	#include <cstring>
23	#include <cstdlib>	26	#include <cstdlib>
24	#include <cstring>
25	#include <cstdio>
26		27
27	#include <sys/types.h>	28	#include <sys/types.h>
28	#include <sys/socket.h>	29	#include <sys/socket.h>
29	#include <sys/poll.h>
30	#include <sys/wait.h>	30	#include <sys/wait.h>
31	#include <errno.h>	31	#include <errno.h>
32	#include <time.h>	32	#include <time.h>
33	#include <unistd.h>	33	#include <unistd.h>
34	#include <arpa/inet.h>	34	#include <fcntl.h>
35	#include <netinet/in.h>	35	#include <sys/socket.h>
36	#include <netinet/ip_icmp.h>	36
		37	#include "netcompat.h"
37		38
38	#include "pidfile.h"	39	#include "pidfile.h"
39		40
40	#include "connection.h"	41	#include "connection.h"
41	#include "util.h"	42	#include "util.h"
42	#include "vpn.h"	43	#include "vpn.h"
		44
		45	vpn network; // THE vpn (bad design...)
43		46
44	/////////////////////////////////////////////////////////////////////////////	47	/////////////////////////////////////////////////////////////////////////////
45		48
46	const char *vpn::script_if_up ()	49	const char *vpn::script_if_up ()
47	{	50	{
…		…
51	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion	54	mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
52	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round	55	mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
53	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again	56	mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
54		57
55	char *env;	58	char *env;
56	asprintf (&env, "CONFBASE=%s", confbase);	59	asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
57	putenv (env);
58	asprintf (&env, "NODENAME=%s", THISNODE->nodename);	60	asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env);
59	putenv (env);
60	asprintf (&env, "NODEID=%d", THISNODE->id);	61	asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
61	putenv (env);
62	asprintf (&env, "IFNAME=%s", tap->interface ());	62	asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
63	putenv (env);	63	asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
		64	asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
64	asprintf (&env, "MTU=%d", mtu);	65	asprintf (&env, "MTU=%d", mtu); putenv (env);
65	putenv (env);
66	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",	66	asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",
67	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,	67	0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
68	THISNODE->id & 0xff);	68	THISNODE->id & 0xff);
69	putenv (env);	69	putenv (env);
70		70
…		…
81	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);	81	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
82		82
83	if (ipv4_fd < 0)	83	if (ipv4_fd < 0)
84	return -1;	84	return -1;
85		85
86	#ifdef IP_MTU_DISCOVER	86	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		87
		88	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
87	// this I really consider a linux bug. I am neither connected	89	// this I really consider a linux bug. I am neither connected
88	// nor do I fragment myself. Linux still sets DF and doesn't	90	// nor do I fragment myself. Linux still sets DF and doesn't
89	// fragment for me sometimes.	91	// fragment for me sometimes.
90	{	92	{
91	int oval = IP_PMTUDISC_DONT;	93	int oval = IP_PMTUDISC_DONT;
…		…
96	sockinfo si (THISNODE, PROT_IPv4);	98	sockinfo si (THISNODE, PROT_IPv4);
97		99
98	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))	100	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
99	{	101	{
100	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));	102	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
101	exit (1);	103	exit (EXIT_FAILURE);
102	}	104	}
103		105
104	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	106	ipv4_ev_watcher.start (ipv4_fd, EVENT_READ);
105	}	107	}
106		108
107	udpv4_fd = -1;	109	udpv4_fd = -1;
108		110
109	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)	111	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
110	{	112	{
111	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	113	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
112		114
113	if (udpv4_fd < 0)	115	if (udpv4_fd < 0)
114	return -1;	116	return -1;
		117
		118	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
115		119
116	// standard daemon practise...	120	// standard daemon practise...
117	{	121	{
118	int oval = 1;	122	int oval = 1;
119	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	123	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
120	}	124	}
121		125
122	#ifdef IP_MTU_DISCOVER	126	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
123	// this I really consider a linux bug. I am neither connected	127	// this I really consider a linux bug. I am neither connected
124	// nor do I fragment myself. Linux still sets DF and doesn't	128	// nor do I fragment myself. Linux still sets DF and doesn't
125	// fragment for me sometimes.	129	// fragment for me sometimes.
126	{	130	{
127	int oval = IP_PMTUDISC_DONT;	131	int oval = IP_PMTUDISC_DONT;
…		…
132	sockinfo si (THISNODE, PROT_UDPv4);	136	sockinfo si (THISNODE, PROT_UDPv4);
133		137
134	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	138	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
135	{	139	{
136	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	140	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
137	exit (1);	141	exit (EXIT_FAILURE);
138	}	142	}
139		143
140	udpv4_ev_watcher.start (udpv4_fd, POLLIN);	144	udpv4_ev_watcher.start (udpv4_fd, EVENT_READ);
141	}	145	}
142		146
143	icmpv4_fd = -1;	147	icmpv4_fd = -1;
144		148
145	#if ENABLE_ICMP	149	#if ENABLE_ICMP
…		…
147	{	151	{
148	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);	152	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
149		153
150	if (icmpv4_fd < 0)	154	if (icmpv4_fd < 0)
151	return -1;	155	return -1;
		156
		157	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
152		158
153	#ifdef ICMP_FILTER	159	#ifdef ICMP_FILTER
154	{	160	{
155	icmp_filter oval;	161	icmp_filter oval;
156	oval.data = 0xffffffff;	162	oval.data = 0xffffffff;
…		…
159		165
160	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);	166	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
161	}	167	}
162	#endif	168	#endif
163		169
164	#ifdef IP_MTU_DISCOVER	170	#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
165	// this I really consider a linux bug. I am neither connected	171	// this I really consider a linux bug. I am neither connected
166	// nor do I fragment myself. Linux still sets DF and doesn't	172	// nor do I fragment myself. Linux still sets DF and doesn't
167	// fragment for me sometimes.	173	// fragment for me sometimes.
168	{	174	{
169	int oval = IP_PMTUDISC_DONT;	175	int oval = IP_PMTUDISC_DONT;
…		…
174	sockinfo si (THISNODE, PROT_ICMPv4);	180	sockinfo si (THISNODE, PROT_ICMPv4);
175		181
176	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))	182	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
177	{	183	{
178	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));	184	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
179	exit (1);	185	exit (EXIT_FAILURE);
180	}	186	}
181		187
182	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);	188	icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ);
183	}	189	}
184	#endif	190	#endif
185		191
186	tcpv4_fd = -1;	192	tcpv4_fd = -1;
187		193
…		…
190	{	196	{
191	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	197	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
192		198
193	if (tcpv4_fd < 0)	199	if (tcpv4_fd < 0)
194	return -1;	200	return -1;
		201
		202	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
195		203
196	// standard daemon practise...	204	// standard daemon practise...
197	{	205	{
198	int oval = 1;	206	int oval = 1;
199	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	207	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
…		…
202	sockinfo si (THISNODE, PROT_TCPv4);	210	sockinfo si (THISNODE, PROT_TCPv4);
203		211
204	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))	212	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
205	{	213	{
206	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));	214	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
207	exit (1);	215	exit (EXIT_FAILURE);
208	}	216	}
209		217
210	if (listen (tcpv4_fd, 5))	218	if (listen (tcpv4_fd, 5))
211	{	219	{
212	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));	220	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
213	exit (1);	221	exit (EXIT_FAILURE);
		222	}
		223
		224	tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ);
		225	}
		226	#endif
		227
		228	#if ENABLE_DNS
		229	if (THISNODE->protocols & PROT_DNSv4)
		230	{
		231	dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
		232
		233	if (dnsv4_fd < 0)
		234	return -1;
		235
		236	// standard daemon practise...
		237	{
		238	int oval = 1;
		239	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
		240	}
		241
		242	sockinfo si (THISNODE, PROT_DNSv4);
		243
		244	if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
214	}	245	{
		246	slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
		247	exit (EXIT_FAILURE);
		248	}
215		249
216	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);	250	dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ);
217	}	251	}
218	#endif	252	#endif
219		253
220	tap = new tap_device ();	254	tap = new tap_device ();
221	if (!tap) //D this, of course, never catches	255	if (!tap) //D this, of course, never catches
222	{	256	{
223	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);	257	slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
224	exit (1);	258	exit (EXIT_FAILURE);
225	}	259	}
226		260
227	run_script (run_script_cb (this, &vpn::script_if_up), true);	261	run_script (run_script_cb (this, &vpn::script_if_up), true);
228		262
229	tap_ev_watcher.start (tap->fd, POLLIN);	263	tap_ev_watcher.start (tap->fd, EVENT_READ);
230		264
231	reconnect_all ();	265	reconnect_all ();
232		266
233	return 0;	267	return 0;
234	}
235
236	// send a vpn packet out to other hosts
237	bool
238	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
239	{
240	switch (si.prot)
241	{
242	case PROT_IPv4:
243	return send_ipv4_packet (pkt, si, tos);
244
245	case PROT_UDPv4:
246	return send_udpv4_packet (pkt, si, tos);
247
248	#if ENABLE_TCP
249	case PROT_TCPv4:
250	return send_tcpv4_packet (pkt, si, tos);
251	#endif
252
253	#if ENABLE_ICMP
254	case PROT_ICMPv4:
255	return send_icmpv4_packet (pkt, si, tos);
256	#endif
257
258	default:
259	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
260	return false;
261	}
262	}	268	}
263		269
264	bool	270	bool
265	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	271	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
266	{	272	{
		273	#if defined(SOL_IP) && defined(IP_TOS)
267	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	274	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		275	#endif
268	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	276	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
269		277
270	return true;	278	return true;
271	}	279	}
272		280
…		…
291	sum += (sum >> 16); // carry	299	sum += (sum >> 16); // carry
292		300
293	return ~sum;	301	return ~sum;
294	}	302	}
295		303
		304	#if ENABLE_ICMP
296	bool	305	bool
297	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	306	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
298	{	307	{
		308	#if defined(SOL_IP) && defined(IP_TOS)
299	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	309	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		310	#endif
300		311
301	pkt->unshift_hdr (4);	312	pkt->unshift_hdr (4);
302		313
303	icmphdr hdr = (icmphdr )&((*pkt)[0]);	314	icmp_header hdr = (icmp_header )&((*pkt)[0]);
304	hdr->type = ::conf.icmp_type;	315	hdr->type = ::conf.icmp_type;
305	hdr->code = 255;	316	hdr->code = 255;
306	hdr->checksum = 0;	317	hdr->checksum = 0;
307	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);	318	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
308		319
309	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	320	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
310		321
311	return true;	322	return true;
312	}	323	}
		324	#endif
313		325
314	bool	326	bool
315	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	327	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
316	{	328	{
		329	#if defined(SOL_IP) && defined(IP_TOS)
317	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	330	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		331	#endif
318	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	332	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
319		333
320	return true;	334	return true;
		335	}
		336
		337	void
		338	vpn::inject_data_packet (tap_packet *pkt, int dst)
		339	{
		340	if (dst)
		341	{
		342	// unicast
		343	if (dst != THISNODE->id)
		344	conns[dst - 1]->inject_data_packet (pkt);
		345	}
		346	else
		347	{
		348	// broadcast, this is ugly, but due to the security policy
		349	// we have to connect to all hosts...
		350	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
		351	if ((*c)->conf != THISNODE)
		352	(*c)->inject_data_packet (pkt, true);
		353	}
321	}	354	}
322		355
323	void	356	void
324	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	357	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
325	{	358	{
…		…
339	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	372	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
340	else	373	else
341	{	374	{
342	connection *c = conns[src - 1];	375	connection *c = conns[src - 1];
343		376
344	if (dst == 0 && !THISNODE->routerprio)	377	if (dst == 0)
345	slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),	378	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
346	c->conf->nodename, (const char *)rsi);	379	c->conf->nodename, (const char *)rsi);
347	else if (dst != 0 && dst != THISNODE->id)	380	else if (dst != THISNODE->id)
348	{	381	{
349	if (THISNODE->routerprio)	382	if (THISNODE->routerprio)
350	// the tos setting gets lost here. who cares.	383	// the tos setting gets lost here. who cares.
351	conns[dst - 1]->inject_vpn_packet (pkt);	384	conns[dst - 1]->inject_vpn_packet (pkt);
352	else	385	else
…		…
361	}	394	}
362		395
363	void	396	void
364	vpn::ipv4_ev (io_watcher &w, short revents)	397	vpn::ipv4_ev (io_watcher &w, short revents)
365	{	398	{
366	if (revents & (POLLIN \| POLLERR))	399	if (revents & EVENT_READ)
367	{	400	{
368	vpn_packet *pkt = new vpn_packet;	401	vpn_packet *pkt = new vpn_packet;
369	struct sockaddr_in sa;	402	struct sockaddr_in sa;
370	socklen_t sa_len = sizeof (sa);	403	socklen_t sa_len = sizeof (sa);
371	int len;	404	int len;
…		…
390	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	423	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
391	}	424	}
392		425
393	delete pkt;	426	delete pkt;
394	}	427	}
395	else if (revents & POLLHUP)
396	{
397	// this cannot ;) happen on udp sockets
398	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
399	exit (1);
400	}
401	else	428	else
402	{	429	{
403	slog (L_ERR,	430	slog (L_ERR,
404	_("FATAL: unknown revents %08x in socket, terminating\n"),	431	_("FATAL: unknown revents %08x in socket, terminating\n"),
405	revents);	432	revents);
406	exit (1);	433	exit (EXIT_FAILURE);
407	}	434	}
408	}	435	}
409		436
		437	#if ENABLE_ICMP
410	void	438	void
411	vpn::icmpv4_ev (io_watcher &w, short revents)	439	vpn::icmpv4_ev (io_watcher &w, short revents)
412	{	440	{
413	if (revents & (POLLIN \| POLLERR))	441	if (revents & EVENT_READ)
414	{	442	{
415	vpn_packet *pkt = new vpn_packet;	443	vpn_packet *pkt = new vpn_packet;
416	struct sockaddr_in sa;	444	struct sockaddr_in sa;
417	socklen_t sa_len = sizeof (sa);	445	socklen_t sa_len = sizeof (sa);
418	int len;	446	int len;
…		…
423		451
424	if (len > 0)	452	if (len > 0)
425	{	453	{
426	pkt->len = len;	454	pkt->len = len;
427		455
428	icmphdr hdr = (icmphdr )&((*pkt)[IP_OVERHEAD]);	456	icmp_header hdr = (icmp_header )&((*pkt)[IP_OVERHEAD]);
429		457
430	if (hdr->type == ::conf.icmp_type	458	if (hdr->type == ::conf.icmp_type
431	&& hdr->code == 255)	459	&& hdr->code == 255)
432	{	460	{
433	// raw sockets deliver the ipv4, but don't expect it on sends	461	// raw sockets deliver the ipv4, but don't expect it on sends
…		…
443	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	471	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
444	}	472	}
445		473
446	delete pkt;	474	delete pkt;
447	}	475	}
448	else if (revents & POLLHUP)
449	{
450	// this cannot ;) happen on udp sockets
451	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
452	exit (1);
453	}
454	else	476	else
455	{	477	{
456	slog (L_ERR,	478	slog (L_ERR,
457	_("FATAL: unknown revents %08x in socket, terminating\n"),	479	_("FATAL: unknown revents %08x in socket, terminating\n"),
458	revents);	480	revents);
459	exit (1);	481	exit (EXIT_FAILURE);
460	}	482	}
461	}	483	}
		484	#endif
462		485
463	void	486	void
464	vpn::udpv4_ev (io_watcher &w, short revents)	487	vpn::udpv4_ev (io_watcher &w, short revents)
465	{	488	{
466	if (revents & (POLLIN \| POLLERR))	489	if (revents & EVENT_READ)
467	{	490	{
468	vpn_packet *pkt = new vpn_packet;	491	vpn_packet *pkt = new vpn_packet;
469	struct sockaddr_in sa;	492	struct sockaddr_in sa;
470	socklen_t sa_len = sizeof (sa);	493	socklen_t sa_len = sizeof (sa);
471	int len;	494	int len;
…		…
486	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));	509	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
487	}	510	}
488		511
489	delete pkt;	512	delete pkt;
490	}	513	}
491	else if (revents & POLLHUP)
492	{
493	// this cannot ;) happen on udp sockets
494	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
495	exit (1);
496	}
497	else	514	else
498	{	515	{
499	slog (L_ERR,	516	slog (L_ERR,
500	_("FATAL: unknown revents %08x in socket, terminating\n"),	517	_("FATAL: unknown revents %08x in socket, terminating\n"),
501	revents);	518	revents);
502	exit (1);	519	exit (EXIT_FAILURE);
503	}	520	}
504	}	521	}
505		522
506	void	523	void
507	vpn::tap_ev (io_watcher &w, short revents)	524	vpn::tap_ev (io_watcher &w, short revents)
508	{	525	{
509	if (revents & POLLIN)	526	if (revents & EVENT_READ)
510	{	527	{
511	/* process data */	528	/* process data */
512	tap_packet *pkt;	529	tap_packet *pkt;
513		530
514	pkt = tap->recv ();	531	pkt = tap->recv ();
515		532
		533	if (!pkt)
		534	return;
		535
		536	if (pkt->len > 14)
		537	{
516	int dst = mac2id (pkt->dst);	538	int dst = mac2id (pkt->dst);
517	int src = mac2id (pkt->src);	539	int src = mac2id (pkt->src);
518		540
519	if (src != THISNODE->id)	541	if (src != THISNODE->id)
520	{
521	slog (L_ERR, _("FATAL: tap packet not originating on current node received, terminating."));
522	exit (1);
523	}
524
525	if (dst == THISNODE->id)
526	{
527	slog (L_ERR, _("FATAL: tap packet destined for current node received, terminating."));
528	exit (1);
529	}
530
531	if (dst > conns.size ())
532	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
533	else
534	{
535	if (dst)
536	{	542	{
537	// unicast	543	slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));
538	if (dst != THISNODE->id)	544	exit (EXIT_FAILURE);
539	conns[dst - 1]->inject_data_packet (pkt);
540	}	545	}
		546
		547	if (dst == THISNODE->id)
		548	{
		549	slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
		550	exit (EXIT_FAILURE);
		551	}
		552
		553	if (dst > conns.size ())
		554	slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
541	else	555	else
542	{
543	// broadcast, first check router, then self, then english
544	connection *router = find_router ();
545
546	if (router)
547	router->inject_data_packet (pkt, true);	556	inject_data_packet (pkt, dst);
548	else
549	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
550	if ((*c)->conf != THISNODE)
551	(*c)->inject_data_packet (pkt);
552	}
553	}	557	}
554		558
555	delete pkt;	559	delete pkt;
556	}
557	else if (revents & (POLLHUP \| POLLERR))
558	{
559	slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
560	exit (1);
561	}	560	}
562	else	561	else
563	abort ();	562	abort ();
564	}	563	}
565		564
…		…
571	if (events & EVENT_SHUTDOWN)	570	if (events & EVENT_SHUTDOWN)
572	{	571	{
573	slog (L_INFO, _("preparing shutdown..."));	572	slog (L_INFO, _("preparing shutdown..."));
574		573
575	shutdown_all ();	574	shutdown_all ();
576
577	remove_pid (pidfilename);	575	remove_pid (conf.pidfilename);
578
579	slog (L_INFO, _("terminating"));	576	slog (L_INFO, _("terminating"));
580		577	exit (EXIT_SUCCESS);
581	exit (0);
582	}	578	}
583		579
584	if (events & EVENT_RECONNECT)	580	if (events & EVENT_RECONNECT)
585	{	581	{
586	slog (L_INFO, _("forced reconnect"));	582	slog (L_INFO, _("forced reconnect"));
…		…
588	reconnect_all ();	584	reconnect_all ();
589	}	585	}
590		586
591	events = 0;	587	events = 0;
592	}	588	}
593
594	w.at = TSTAMP_CANCEL;
595	}	589	}
596		590
597	void	591	void
598	vpn::shutdown_all ()	592	vpn::shutdown_all ()
599	{	593	{
…		…
612	connection_init ();	606	connection_init ();
613		607
614	for (configuration::node_vector::iterator i = conf.nodes.begin ();	608	for (configuration::node_vector::iterator i = conf.nodes.begin ();
615	i != conf.nodes.end (); ++i)	609	i != conf.nodes.end (); ++i)
616	{	610	{
617	connection *conn = new connection (this);	611	connection conn = new connection (this, i);
618
619	conn->conf = *i;
620	conns.push_back (conn);	612	conns.push_back (conn);
621
622	conn->establish_connection ();	613	conn->establish_connection ();
623	}	614	}
624	}	615	}
625		616
626	connection *vpn::find_router ()	617	connection *vpn::find_router ()
627	{	618	{
628	u32 prio = 0;	619	u32 prio = 1;
629	connection *router = 0;	620	connection *router = 0;
630		621
631	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	622	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
632	{	623	{
633	connection c = i;	624	connection c = i;
634		625
635	if (c->conf->routerprio > prio	626	if (c->conf->routerprio > prio
636	&& c->connectmode == conf_node::C_ALWAYS	627	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use
637	&& c->conf != THISNODE
638	&& c->ictx && c->octx)	628	&& c->ictx && c->octx
		629	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode
639	{	630	{
640	prio = c->conf->routerprio;	631	prio = c->conf->routerprio;
641	router = c;	632	router = c;
642	}	633	}
643	}	634	}
…		…
652	if (c)	643	if (c)
653	c->send_connect_request (id);	644	c->send_connect_request (id);
654	else	645	else
655	// no router found, aggressively connect to all routers	646	// no router found, aggressively connect to all routers
656	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	647	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
657	if ((*i)->conf->routerprio)	648	if ((i)->conf->routerprio && (i)->conf != THISNODE)
658	(*i)->establish_connection ();	649	(*i)->establish_connection ();
659	}	650	}
660		651
661	void	652	void
662	connection::dump_status ()	653	connection::dump_status ()
…		…
689	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)	680	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
690	#endif	681	#endif
691	#if ENABLE_ICMP	682	#if ENABLE_ICMP
692	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)	683	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
693	#endif	684	#endif
		685	#if ENABLE_DNS
		686	, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)
		687	#endif
694	, tap_ev_watcher (this, &vpn::tap_ev)	688	, tap_ev_watcher (this, &vpn::tap_ev)
695	{	689	{
696	}	690	}
697		691
698	vpn::~vpn ()	692	vpn::~vpn ()

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Comparing gvpe/src/vpn.C (file contents): Revision 1.10 by pcg, Tue Apr 8 03:25:35 2003 UTC vs. Revision 1.27 by pcg, Tue Mar 1 06:27:20 2005 UTC

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Comparing gvpe/src/vpn.C (file contents):
Revision 1.10 by pcg, Tue Apr 8 03:25:35 2003 UTC vs.
Revision 1.27 by pcg, Tue Mar 1 06:27:20 2005 UTC