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

Comparing gvpe/src/vpn.C (file contents):
Revision 1.2 by pcg, Wed Apr 2 05:15:00 2003 UTC vs.
Revision 1.13 by pcg, Sun Apr 13 16:53:36 2003 UTC

…		…
26		26
27	#include <sys/types.h>	27	#include <sys/types.h>
28	#include <sys/socket.h>	28	#include <sys/socket.h>
29	#include <sys/poll.h>	29	#include <sys/poll.h>
30	#include <sys/wait.h>	30	#include <sys/wait.h>
31	#include <netinet/in.h>
32	#include <arpa/inet.h>
33	#include <errno.h>	31	#include <errno.h>
34	#include <time.h>	32	#include <time.h>
35	#include <unistd.h>	33	#include <unistd.h>
		34	#include <fcntl.h>
		35	#include <arpa/inet.h>
		36	#include <netinet/in.h>
		37	#include <netinet/ip_icmp.h>
36		38
37	#include "pidfile.h"	39	#include "pidfile.h"
38		40
39	#include "connection.h"	41	#include "connection.h"
40	#include "util.h"	42	#include "util.h"
41	#include "vpn.h"	43	#include "vpn.h"
42
43	#if ENABLE_TCP
44	# include <map>
45	# include <unistd.h>
46	# include <fcntl.h>
47	# include <sys/poll.h>
48	#endif
49		44
50	/////////////////////////////////////////////////////////////////////////////	45	/////////////////////////////////////////////////////////////////////////////
51		46
52	const char *vpn::script_if_up ()	47	const char *vpn::script_if_up ()
53	{	48	{
…		…
78	}	73	}
79		74
80	int	75	int
81	vpn::setup ()	76	vpn::setup ()
82	{	77	{
		78	ipv4_fd = -1;
		79
		80	if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
		81	{
		82	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
		83
		84	if (ipv4_fd < 0)
		85	return -1;
		86
		87	fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
		88
		89	#ifdef IP_MTU_DISCOVER
		90	// this I really consider a linux bug. I am neither connected
		91	// nor do I fragment myself. Linux still sets DF and doesn't
		92	// fragment for me sometimes.
		93	{
		94	int oval = IP_PMTUDISC_DONT;
		95	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
		96	}
		97	#endif
		98
		99	sockinfo si (THISNODE, PROT_IPv4);
		100
		101	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
		102	{
		103	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
		104	exit (1);
		105	}
		106
		107	ipv4_ev_watcher.start (ipv4_fd, POLLIN);
		108	}
		109
83	udpv4_fd = -1;	110	udpv4_fd = -1;
84		111
85	if (THISNODE->protocols & PROT_UDPv4)	112	if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
86	{	113	{
87	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);	114	udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
88		115
89	if (udpv4_fd < 0)	116	if (udpv4_fd < 0)
90	return -1;	117	return -1;
91		118
92	sockinfo si (THISNODE, PROT_UDPv4);	119	fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
93		120
94	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))	121	// standard daemon practise...
95	{	122	{
96	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));	123	int oval = 1;
97	exit (1);	124	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
98	}	125	}
99		126
100	#ifdef IP_MTU_DISCOVER	127	#ifdef IP_MTU_DISCOVER
101	// this I really consider a linux bug. I am neither connected	128	// this I really consider a linux bug. I am neither connected
102	// nor do I fragment myself. Linux still sets DF and doesn't	129	// nor do I fragment myself. Linux still sets DF and doesn't
103	// fragment for me sometimes.	130	// fragment for me sometimes.
…		…
105	int oval = IP_PMTUDISC_DONT;	132	int oval = IP_PMTUDISC_DONT;
106	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	133	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
107	}	134	}
108	#endif	135	#endif
109		136
110	// standard daemon practise...	137	sockinfo si (THISNODE, PROT_UDPv4);
		138
		139	if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
		140	{
		141	slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
		142	exit (1);
		143	}
		144
		145	udpv4_ev_watcher.start (udpv4_fd, POLLIN);
		146	}
		147
		148	icmpv4_fd = -1;
		149
		150	#if ENABLE_ICMP
		151	if (THISNODE->protocols & PROT_ICMPv4)
		152	{
		153	icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
		154
		155	if (icmpv4_fd < 0)
		156	return -1;
		157
		158	fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
		159
		160	#ifdef ICMP_FILTER
111	{	161	{
112	int oval = 1;	162	icmp_filter oval;
		163	oval.data = 0xffffffff;
		164	if (::conf.icmp_type < 32)
		165	oval.data &= ~(1 << ::conf.icmp_type);
		166
113	setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	167	setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
114	}	168	}
115		169	#endif
116	udpv4_ev_watcher.start (udpv4_fd, POLLIN);
117	}
118
119	ipv4_fd = -1;
120	if (THISNODE->protocols & PROT_IPv4)
121	{
122	ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
123
124	if (ipv4_fd < 0)
125	return -1;
126
127	sockinfo si (THISNODE, PROT_IPv4);
128
129	if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
130	{
131	slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
132	exit (1);
133	}
134		170
135	#ifdef IP_MTU_DISCOVER	171	#ifdef IP_MTU_DISCOVER
136	// this I really consider a linux bug. I am neither connected	172	// this I really consider a linux bug. I am neither connected
137	// nor do I fragment myself. Linux still sets DF and doesn't	173	// nor do I fragment myself. Linux still sets DF and doesn't
138	// fragment for me sometimes.	174	// fragment for me sometimes.
139	{	175	{
140	int oval = IP_PMTUDISC_DONT;	176	int oval = IP_PMTUDISC_DONT;
141	setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);	177	setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
142	}	178	}
143	#endif	179	#endif
144		180
		181	sockinfo si (THISNODE, PROT_ICMPv4);
		182
		183	if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
		184	{
		185	slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
		186	exit (1);
		187	}
		188
145	ipv4_ev_watcher.start (ipv4_fd, POLLIN);	189	icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);
146	}	190	}
		191	#endif
		192
		193	tcpv4_fd = -1;
147		194
148	#if ENABLE_TCP	195	#if ENABLE_TCP
149	if (THISNODE->protocols & PROT_TCPv4)	196	if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
150	{	197	{
151	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);	198	tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
152		199
153	if (tcpv4_fd < 0)	200	if (tcpv4_fd < 0)
154	return -1;	201	return -1;
155		202
156	sockinfo si (THISNODE, PROT_TCPv4);	203	fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
157
158	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
159	{
160	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
161	exit (1);
162	}
163
164	if (listen (tcpv4_fd, 5))
165	{
166	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
167	exit (1);
168	}
169		204
170	// standard daemon practise...	205	// standard daemon practise...
171	{	206	{
172	int oval = 1;	207	int oval = 1;
173	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);	208	setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
174	}	209	}
175		210
		211	sockinfo si (THISNODE, PROT_TCPv4);
		212
		213	if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
		214	{
		215	slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
		216	exit (1);
		217	}
		218
		219	if (listen (tcpv4_fd, 5))
		220	{
		221	slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
		222	exit (1);
		223	}
		224
176	tcpv4_accept_watcher.start (tcpv4_fd, POLLIN);	225	tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
177	}	226	}
178	#endif	227	#endif
179		228
180	tap = new tap_device ();	229	tap = new tap_device ();
181	if (!tap) //D this, of course, never catches	230	if (!tap) //D this, of course, never catches
…		…
191	reconnect_all ();	240	reconnect_all ();
192		241
193	return 0;	242	return 0;
194	}	243	}
195		244
196	void	245	// send a vpn packet out to other hosts
		246	bool
		247	vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		248	{
		249	switch (si.prot)
		250	{
		251	case PROT_IPv4:
		252	return send_ipv4_packet (pkt, si, tos);
		253
		254	case PROT_UDPv4:
		255	return send_udpv4_packet (pkt, si, tos);
		256
		257	#if ENABLE_TCP
		258	case PROT_TCPv4:
		259	return send_tcpv4_packet (pkt, si, tos);
		260	#endif
		261
		262	#if ENABLE_ICMP
		263	case PROT_ICMPv4:
		264	return send_icmpv4_packet (pkt, si, tos);
		265	#endif
		266
		267	default:
		268	slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
		269	return false;
		270	}
		271	}
		272
		273	bool
197	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	274	vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
198	{	275	{
199	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	276	setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
200	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	277	sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
201	}
202		278
203	void	279	return true;
		280	}
		281
		282	static u16
		283	ipv4_checksum (u16 *data, unsigned int len)
		284	{
		285	// use 32 bit accumulator and fold back carry bits at the end
		286	u32 sum = 0;
		287
		288	while (len > 1)
		289	{
		290	sum += *data++;
		291	len -= 2;
		292	}
		293
		294	// odd byte left?
		295	if (len)
		296	sum += (u8 )data;
		297
		298	// add back carry bits
		299	sum = (sum >> 16) + (sum & 0xffff); // lo += hi
		300	sum += (sum >> 16); // carry
		301
		302	return ~sum;
		303	}
		304
		305	#if ENABLE_ICMP
		306	bool
		307	vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
		308	{
		309	setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
		310
		311	pkt->unshift_hdr (4);
		312
		313	icmphdr hdr = (icmphdr )&((*pkt)[0]);
		314	hdr->type = ::conf.icmp_type;
		315	hdr->code = 255;
		316	hdr->checksum = 0;
		317	hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
		318
		319	sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		320
		321	return true;
		322	}
		323	#endif
		324
		325	bool
204	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)	326	vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
205	{	327	{
206	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);	328	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
207	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());	329	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
		330
		331	return true;
208	}	332	}
209		333
210	void	334	void
211	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)	335	vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
212	{	336	{
…		…
219	if (src == 0 \|\| src > conns.size ()	343	if (src == 0 \|\| src > conns.size ()
220	\|\| dst > conns.size ()	344	\|\| dst > conns.size ()
221	\|\| pkt->typ () >= vpn_packet::PT_MAX)	345	\|\| pkt->typ () >= vpn_packet::PT_MAX)
222	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),	346	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
223	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());	347	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
		348	else if (dst > conns.size ())
		349	slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
		350	(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
224	else	351	else
225	{	352	{
226	connection *c = conns[src - 1];	353	connection *c = conns[src - 1];
227		354
228	if (dst == 0 && !THISNODE->routerprio)	355	if (dst == 0)
229	slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),	356	slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
230	c->conf->nodename, (const char *)rsi);	357	c->conf->nodename, (const char *)rsi);
231	else if (dst != 0 && dst != THISNODE->id)	358	else if (dst != 0 && dst != THISNODE->id)
232	// FORWARDING NEEDED ;)	359	{
		360	if (THISNODE->routerprio)
		361	// the tos setting gets lost here. who cares.
		362	conns[dst - 1]->inject_vpn_packet (pkt);
		363	else
233	slog (L_WARN,	364	slog (L_WARN,
234	_("received frame for node %d ('%s') from %s, but this is node %d ('%s')"),	365	_("%s(%s): forwarding request (=> %s), but we are no router"),
		366	c->conf->nodename, (const char *)rsi,
235	dst, conns[dst - 1]->conf->nodename,	367	conns[dst - 1]->conf->nodename);
236	(const char *)rsi,	368	}
237	THISNODE->id, THISNODE->nodename);
238	else	369	else
239	c->recv_vpn_packet (pkt, rsi);	370	c->recv_vpn_packet (pkt, rsi);
240	}	371	}
241	}	372	}
242		373
243	void	374	void
244	vpn::udpv4_ev (int fd, short revents)	375	vpn::ipv4_ev (io_watcher &w, short revents)
245	{	376	{
246	if (revents & (POLLIN \| POLLERR))	377	if (revents & (POLLIN \| POLLERR))
247	{	378	{
248	vpn_packet *pkt = new vpn_packet;	379	vpn_packet *pkt = new vpn_packet;
249	struct sockaddr_in sa;	380	struct sockaddr_in sa;
250	socklen_t sa_len = sizeof (sa);	381	socklen_t sa_len = sizeof (sa);
251	int len;	382	int len;
252		383
253	len = recvfrom (fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	384	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
254		385
255	sockinfo si(sa);	386	sockinfo si(sa, PROT_IPv4);
256		387
257	if (len > 0)	388	if (len > 0)
258	{	389	{
259	pkt->len = len;	390	pkt->len = len;
		391
		392	// raw sockets deliver the ipv4, but don't expect it on sends
		393	// this is slow, but...
		394	pkt->skip_hdr (IP_OVERHEAD);
260		395
261	recv_vpn_packet (pkt, si);	396	recv_vpn_packet (pkt, si);
262	}	397	}
263	else	398	else
264	{	399	{
…		…
269	delete pkt;	404	delete pkt;
270	}	405	}
271	else if (revents & POLLHUP)	406	else if (revents & POLLHUP)
272	{	407	{
273	// this cannot ;) happen on udp sockets	408	// this cannot ;) happen on udp sockets
274	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));	409	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
275	exit (1);	410	exit (1);
276	}	411	}
277	else	412	else
278	{	413	{
279	slog (L_ERR,	414	slog (L_ERR,
…		…
281	revents);	416	revents);
282	exit (1);	417	exit (1);
283	}	418	}
284	}	419	}
285		420
		421	#if ENABLE_ICMP
286	void	422	void
287	vpn::ipv4_ev (int fd, short revents)	423	vpn::icmpv4_ev (io_watcher &w, short revents)
288	{	424	{
289	if (revents & (POLLIN \| POLLERR))	425	if (revents & (POLLIN \| POLLERR))
290	{	426	{
291	vpn_packet *pkt = new vpn_packet;	427	vpn_packet *pkt = new vpn_packet;
292	struct sockaddr_in sa;	428	struct sockaddr_in sa;
293	socklen_t sa_len = sizeof (sa);	429	socklen_t sa_len = sizeof (sa);
294	int len;	430	int len;
295		431
296	len = recvfrom (fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);	432	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
297		433
298	sockinfo si(sa, PROT_IPv4);	434	sockinfo si(sa, PROT_ICMPv4);
299		435
300	if (len > 0)	436	if (len > 0)
301	{	437	{
302	pkt->len = len;	438	pkt->len = len;
303		439
		440	icmphdr hdr = (icmphdr )&((*pkt)[IP_OVERHEAD]);
		441
		442	if (hdr->type == ::conf.icmp_type
		443	&& hdr->code == 255)
		444	{
304	// raw sockets deliver the ipv4, but don't expect it on sends	445	// raw sockets deliver the ipv4, but don't expect it on sends
305	// this is slow, but...	446	// this is slow, but...
306	pkt->skip_hdr (IP_OVERHEAD);	447	pkt->skip_hdr (ICMP_OVERHEAD);
307		448
308	recv_vpn_packet (pkt, si);	449	recv_vpn_packet (pkt, si);
		450	}
309	}	451	}
310	else	452	else
311	{	453	{
312	// probably ECONNRESET or somesuch	454	// probably ECONNRESET or somesuch
313	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));	455	slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
…		…
316	delete pkt;	458	delete pkt;
317	}	459	}
318	else if (revents & POLLHUP)	460	else if (revents & POLLHUP)
319	{	461	{
320	// this cannot ;) happen on udp sockets	462	// this cannot ;) happen on udp sockets
321	slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));	463	slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
322	exit (1);	464	exit (1);
323	}	465	}
324	else	466	else
325	{	467	{
326	slog (L_ERR,	468	slog (L_ERR,
327	_("FATAL: unknown revents %08x in socket, terminating\n"),	469	_("FATAL: unknown revents %08x in socket, terminating\n"),
328	revents);	470	revents);
329	exit (1);	471	exit (1);
330	}	472	}
331	}	473	}
332
333	#if ENABLE_TCP
334
335	struct tcp_info {
336	int fd;
337	bool ok;
338	io_watcher r;
339
340	tcp_info (vpn *v)
341	: r(v, &vpn::tcpv4_ev)
342	{
343	fd = -1;
344	}
345
346	~tcp_info () { close (fd); }
347	};
348
349	typedef map<sockinfo, tcp_info *> tcp_si_map;
350	typedef map<int, tcp_info *> tcp_fd_map; // unneecssary if iom would be cooler
351	static tcp_si_map tcp_si;
352	static tcp_fd_map tcp_fd;
353
354	void
355	vpn::send_tcpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
356	{
357	tcp_si_map::iterator info = tcp_si.find (si);
358
359	if (info == tcp_si.end ())
360	{
361	// woaw, the first lost packet ;)
362	tcp_info *i = new tcp_info (this);
363
364	i->ok = false;
365	i->fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
366
367	if (i->fd >= 0)
368	{
369	fcntl (i->fd, F_SETFL, O_NONBLOCK);
370
371	if (connect (i->fd, si.sav4 (), si.salenv4 ()) >= 0
372	\|\| errno == EINPROGRESS)
373	{
374	tcp_si.insert (tcp_si_map::value_type (si, i));
375	tcp_fd.insert (tcp_fd_map::value_type (i->fd, i));
376	return;
377	}
378
379	delete i;
380	}
381	}
382	else
383	{
384	tcp_info *i = info->second;
385
386	if (i->ok)
387	{
388	setsockopt (i->fd, SOL_IP, IP_TOS, &tos, sizeof tos);
389
390	if (write (i->fd, (void *)pkt, pkt->len + sizeof (u32)) != pkt->len + sizeof (u32))
391	{
392	// error, close socket, forget it and retry immediately
393	tcp_si.erase (info);
394	tcp_fd.erase (i->fd);
395	delete i;
396
397	// tail recursion is... better than goto(?)
398	send_tcpv4_packet (pkt, si, tos);
399	}
400	}
401	}
402
403	#if 0
404	setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
405	sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
406	#endif	474	#endif
407	}
408		475
409	void	476	void
410	vpn::tcpv4_accept (int fd, short revents)	477	vpn::udpv4_ev (io_watcher &w, short revents)
411	{	478	{
412	if (revents & (POLLIN \| POLLERR))	479	if (revents & (POLLIN \| POLLERR))
413	{	480	{
		481	vpn_packet *pkt = new vpn_packet;
414	struct sockaddr_in sa;	482	struct sockaddr_in sa;
415	socklen_t sa_len = sizeof (sa);	483	socklen_t sa_len = sizeof (sa);
416	int len;	484	int len;
417		485
418	fd = accept (fd, (sockaddr *)&sa, &sa_len);	486	len = recvfrom (w.fd, &((pkt)[0]), MAXSIZE, 0, (sockaddr )&sa, &sa_len);
419		487
420	if (fd >= 0)
421	{
422	fcntl (fd, F_SETFL, O_NONBLOCK);
423
424	sockinfo si(sa, PROT_TCPv4);	488	sockinfo si(sa, PROT_UDPv4);
425	tcp_info *i = new tcp_info (this);
426		489
427	i->fd = fd;	490	if (len > 0)
428	i->ok = true;
429	i->r.start (fd, POLLIN);
430
431	tcp_si.insert (tcp_si_map::value_type (si, i));
432	tcp_fd.insert (tcp_fd_map::value_type (fd, i));
433	}	491	{
434	}	492	pkt->len = len;
435	}
436		493
437	void	494	recv_vpn_packet (pkt, si);
438	vpn::tcpv4_ev (int fd, short revents)
439	{
440	if (revents & (POLLIN \| POLLERR))
441	{
442	tcp_fd_map::iterator info = tcp_fd.find (fd);
443
444	if (info != tcp_fd.end ())
445	{	495	}
446	tcp_info *i = info->second;	496	else
447
448	if (!i->ok) // not yet established
449	{
450	i->ok = true;
451	fcntl (i->fd, F_SETFL, 0);
452	}
453
454	u32 len;
455
456	if (sizeof (len) == read (fd, &len, sizeof (len)))
457	{
458	slog (L_ERR, "%d bytes received\n", len);
459	}
460
461	//tcp_si.erase (i);
462	tcp_fd.erase (fd);
463	delete i;
464	}	497	{
		498	// probably ECONNRESET or somesuch
		499	slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
		500	}
		501
		502	delete pkt;
		503	}
		504	else if (revents & POLLHUP)
465	}	505	{
		506	// this cannot ;) happen on udp sockets
		507	slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
		508	exit (1);
		509	}
		510	else
		511	{
		512	slog (L_ERR,
		513	_("FATAL: unknown revents %08x in socket, terminating\n"),
		514	revents);
		515	exit (1);
		516	}
466	}	517	}
467		518
468	#endif
469
470	void	519	void
471	vpn::tap_ev (int fd, short revents)	520	vpn::tap_ev (io_watcher &w, short revents)
472	{	521	{
473	if (revents & POLLIN)	522	if (revents & POLLIN)
474	{	523	{
475	/* process data */	524	/* process data */
476	tap_packet *pkt;	525	tap_packet *pkt;
…		…
502	if (dst != THISNODE->id)	551	if (dst != THISNODE->id)
503	conns[dst - 1]->inject_data_packet (pkt);	552	conns[dst - 1]->inject_data_packet (pkt);
504	}	553	}
505	else	554	else
506	{	555	{
507	// broadcast, first check router, then self, then english	556	// broadcast, this is ugly, but due to the security policy
508	connection *router = find_router ();	557	// we have to connect to all hosts...
509
510	if (router)
511	router->inject_data_packet (pkt, true);
512	else
513	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)	558	for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
514	if ((*c)->conf != THISNODE)	559	if ((*c)->conf != THISNODE)
515	(*c)->inject_data_packet (pkt);	560	(*c)->inject_data_packet (pkt);
516	}	561	}
517	}	562	}
518		563
519	delete pkt;	564	delete pkt;
520	}	565	}
…		…
526	else	571	else
527	abort ();	572	abort ();
528	}	573	}
529		574
530	void	575	void
531	vpn::event_cb (tstamp &ts)	576	vpn::event_cb (time_watcher &w)
532	{	577	{
533	if (events)	578	if (events)
534	{	579	{
535	if (events & EVENT_SHUTDOWN)	580	if (events & EVENT_SHUTDOWN)
536	{	581	{
…		…
553	}	598	}
554		599
555	events = 0;	600	events = 0;
556	}	601	}
557		602
558	ts = TSTAMP_CANCEL;	603	w.at = TSTAMP_CANCEL;
559	}	604	}
560		605
561	void	606	void
562	vpn::shutdown_all ()	607	vpn::shutdown_all ()
563	{	608	{
…		…
587	}	632	}
588	}	633	}
589		634
590	connection *vpn::find_router ()	635	connection *vpn::find_router ()
591	{	636	{
592	u32 prio = 0;	637	u32 prio = 1;
593	connection *router = 0;	638	connection *router = 0;
594		639
595	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	640	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
596	{	641	{
597	connection c = i;	642	connection c = i;
598		643
599	if (c->conf->routerprio > prio	644	if (c->conf->routerprio > prio
600	&& c->connectmode == conf_node::C_ALWAYS	645	&& c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use
601	&& c->conf != THISNODE
602	&& c->ictx && c->octx)	646	&& c->ictx && c->octx
		647	&& c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode
603	{	648	{
604	prio = c->conf->routerprio;	649	prio = c->conf->routerprio;
605	router = c;	650	router = c;
606	}	651	}
607	}	652	}
608		653
609	return router;	654	return router;
610	}	655	}
611		656
612	void vpn::connect_request (int id)	657	void vpn::send_connect_request (int id)
613	{	658	{
614	connection *c = find_router ();	659	connection *c = find_router ();
615		660
616	if (c)	661	if (c)
617	c->connect_request (id);	662	c->send_connect_request (id);
618	//else // does not work, because all others must connect to the same router	663	else
619	// // no router found, aggressively connect to all routers	664	// no router found, aggressively connect to all routers
620	// for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)	665	for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
621	// if ((*i)->conf->routerprio)	666	if ((i)->conf->routerprio && (i)->conf != THISNODE)
622	// (*i)->establish_connection ();	667	(*i)->establish_connection ();
623	}	668	}
624		669
625	void	670	void
626	connection::dump_status ()	671	connection::dump_status ()
627	{	672	{
…		…
644		689
645	slog (L_NOTICE, _("END status dump"));	690	slog (L_NOTICE, _("END status dump"));
646	}	691	}
647		692
648	vpn::vpn (void)	693	vpn::vpn (void)
649	: event(this, &vpn::event_cb)	694	: event (this, &vpn::event_cb)
650	, udpv4_ev_watcher(this, &vpn::udpv4_ev)	695	, udpv4_ev_watcher (this, &vpn::udpv4_ev)
651	, ipv4_ev_watcher (this, &vpn::ipv4_ev)	696	, ipv4_ev_watcher (this, &vpn::ipv4_ev)
652	, tap_ev_watcher (this, &vpn::tap_ev)
653	#if ENABLE_TCP	697	#if ENABLE_TCP
654	, tcpv4_accept_watcher(this, &vpn::tcpv4_accept)	698	, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
655	#endif	699	#endif
		700	#if ENABLE_ICMP
		701	, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
		702	#endif
		703	, tap_ev_watcher (this, &vpn::tap_ev)
656	{	704	{
657	}	705	}
658		706
659	vpn::~vpn ()	707	vpn::~vpn ()
660	{	708	{

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Comparing gvpe/src/vpn.C (file contents): Revision 1.2 by pcg, Wed Apr 2 05:15:00 2003 UTC vs. Revision 1.13 by pcg, Sun Apr 13 16:53:36 2003 UTC

Diff Legend

Comparing gvpe/src/vpn.C (file contents):
Revision 1.2 by pcg, Wed Apr 2 05:15:00 2003 UTC vs.
Revision 1.13 by pcg, Sun Apr 13 16:53:36 2003 UTC