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 | Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
5 | This file is part of GVPE. |
5 | This file is part of GVPE. |
6 | |
6 | |
7 | GVPE is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify it |
8 | it under the terms of the GNU General Public License as published by |
8 | under the terms of the GNU General Public License as published by the |
9 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
10 | (at your option) any later version. |
10 | option) any later version. |
11 | |
11 | |
12 | 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, but |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
15 | GNU General Public License for more details. |
15 | Public License for more details. |
16 | |
16 | |
17 | 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 along |
18 | along with gvpe; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | |
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20 | Additional permission under GNU GPL version 3 section 7 |
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21 | |
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22 | If you modify this Program, or any covered work, by linking or |
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23 | combining it with the OpenSSL project's OpenSSL library (or a modified |
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24 | version of that library), containing parts covered by the terms of the |
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25 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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26 | additional permission to convey the resulting work. Corresponding |
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27 | Source for a non-source form of such a combination shall include the |
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28 | source code for the parts of OpenSSL used as well as that of the |
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29 | covered work. |
20 | */ |
30 | */ |
21 | |
31 | |
22 | #include "config.h" |
32 | #include "config.h" |
23 | |
33 | |
24 | #include <list> |
34 | #include <list> |
… | |
… | |
112 | } |
122 | } |
113 | |
123 | |
114 | int |
124 | int |
115 | vpn::setup () |
125 | vpn::setup () |
116 | { |
126 | { |
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127 | int success = 0; |
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128 | |
117 | ipv4_tos = -1; |
129 | ipv4_tos = -1; |
118 | ipv4_fd = -1; |
130 | ipv4_fd = -1; |
119 | |
131 | |
120 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
132 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
121 | { |
133 | { |
… | |
… | |
139 | |
151 | |
140 | sockinfo si (THISNODE, PROT_IPv4); |
152 | sockinfo si (THISNODE, PROT_IPv4); |
141 | |
153 | |
142 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
154 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
143 | { |
155 | { |
144 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
156 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
145 | exit (EXIT_FAILURE); |
157 | exit (EXIT_FAILURE); |
146 | } |
158 | } |
147 | |
159 | |
148 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
160 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
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161 | ++success; |
149 | } |
162 | } |
|
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163 | else |
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164 | THISNODE->protocols &= ~PROT_IPv4; |
150 | |
165 | |
151 | udpv4_tos = -1; |
166 | udpv4_tos = -1; |
152 | udpv4_fd = -1; |
167 | udpv4_fd = -1; |
153 | |
168 | |
154 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
169 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
… | |
… | |
179 | |
194 | |
180 | sockinfo si (THISNODE, PROT_UDPv4); |
195 | sockinfo si (THISNODE, PROT_UDPv4); |
181 | |
196 | |
182 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
197 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
183 | { |
198 | { |
184 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
199 | slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
185 | exit (EXIT_FAILURE); |
200 | exit (EXIT_FAILURE); |
186 | } |
201 | } |
187 | |
202 | |
188 | udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
203 | udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
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204 | ++success; |
189 | } |
205 | } |
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206 | else |
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207 | THISNODE->protocols &= ~PROT_UDPv4; |
190 | |
208 | |
191 | icmpv4_tos = -1; |
209 | icmpv4_tos = -1; |
192 | icmpv4_fd = -1; |
210 | icmpv4_fd = -1; |
193 | |
211 | |
194 | #if ENABLE_ICMP |
212 | #if ENABLE_ICMP |
… | |
… | |
225 | |
243 | |
226 | sockinfo si (THISNODE, PROT_ICMPv4); |
244 | sockinfo si (THISNODE, PROT_ICMPv4); |
227 | |
245 | |
228 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
246 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
229 | { |
247 | { |
230 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
248 | slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
231 | exit (EXIT_FAILURE); |
249 | exit (EXIT_FAILURE); |
232 | } |
250 | } |
233 | |
251 | |
234 | icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
252 | icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
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253 | ++success; |
235 | } |
254 | } |
236 | #endif |
255 | #endif |
237 | |
256 | |
238 | tcpv4_fd = -1; |
257 | tcpv4_fd = -1; |
239 | |
258 | |
… | |
… | |
256 | |
275 | |
257 | sockinfo si (THISNODE, PROT_TCPv4); |
276 | sockinfo si (THISNODE, PROT_TCPv4); |
258 | |
277 | |
259 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
278 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
260 | { |
279 | { |
261 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
280 | slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
262 | exit (EXIT_FAILURE); |
281 | exit (EXIT_FAILURE); |
263 | } |
282 | } |
264 | |
283 | |
265 | if (listen (tcpv4_fd, 5)) |
284 | if (listen (tcpv4_fd, 5)) |
266 | { |
285 | { |
267 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
286 | slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
268 | exit (EXIT_FAILURE); |
287 | exit (EXIT_FAILURE); |
269 | } |
288 | } |
270 | |
289 | |
271 | tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
290 | tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
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291 | ++success; |
272 | } |
292 | } |
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293 | else |
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294 | THISNODE->protocols &= ~PROT_TCPv4; |
273 | #endif |
295 | #endif |
274 | |
296 | |
275 | dnsv4_tos = -1; |
297 | dnsv4_tos = -1; |
276 | dnsv4_fd = -1; |
298 | dnsv4_fd = -1; |
277 | |
299 | |
… | |
… | |
308 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
330 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
309 | PROT_DNSv4); |
331 | PROT_DNSv4); |
310 | |
332 | |
311 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
333 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
312 | { |
334 | { |
313 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
335 | slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
314 | exit (EXIT_FAILURE); |
336 | exit (EXIT_FAILURE); |
315 | } |
337 | } |
316 | |
338 | |
317 | dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
339 | dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
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340 | ++success; |
318 | } |
341 | } |
319 | #endif |
342 | #endif |
320 | |
343 | |
321 | ///////////////////////////////////////////////////////////////////////////// |
344 | ///////////////////////////////////////////////////////////////////////////// |
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345 | |
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346 | if (!success) |
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347 | { |
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348 | slog (L_ERR, _("no protocols enabled, exiting.")); |
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349 | exit (EXIT_FAILURE); |
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350 | } |
322 | |
351 | |
323 | reconnect_all (); |
352 | reconnect_all (); |
324 | |
353 | |
325 | ///////////////////////////////////////////////////////////////////////////// |
354 | ///////////////////////////////////////////////////////////////////////////// |
326 | |
355 | |
327 | tap = new tap_device (); |
356 | tap = new tap_device (); |
328 | if (!tap) //D this, of course, never catches |
357 | if (!tap) //D this, of course, never catches |
329 | { |
358 | { |
330 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
359 | slog (L_ERR, _("cannot create network interface '%s', exiting."), conf.ifname); |
331 | exit (EXIT_FAILURE); |
360 | exit (EXIT_FAILURE); |
332 | } |
361 | } |
333 | |
362 | |
334 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
363 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
335 | |
364 | |
… | |
… | |
429 | { |
458 | { |
430 | // broadcast, this is ugly, but due to the security policy |
459 | // broadcast, this is ugly, but due to the security policy |
431 | // we have to connect to all hosts... |
460 | // we have to connect to all hosts... |
432 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
461 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
433 | if ((*c)->conf != THISNODE) |
462 | if ((*c)->conf != THISNODE) |
434 | (*c)->inject_data_packet (pkt, true); |
463 | (*c)->inject_data_packet (pkt); |
435 | } |
464 | } |
436 | } |
465 | } |
437 | |
466 | |
438 | void |
467 | void |
439 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
468 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
440 | { |
469 | { |
441 | unsigned int src = pkt->src (); |
470 | unsigned int src = pkt->src (); |
442 | unsigned int dst = pkt->dst (); |
471 | unsigned int dst = pkt->dst (); |
443 | |
472 | |
444 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"), |
473 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."), |
445 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
474 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
446 | |
475 | |
447 | if (src == 0 || src > conns.size () |
476 | if (src == 0 || src > conns.size () |
448 | || dst > conns.size () |
477 | || dst > conns.size () |
449 | || pkt->typ () >= vpn_packet::PT_MAX) |
478 | || pkt->typ () >= vpn_packet::PT_MAX) |
450 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
479 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
451 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
480 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
452 | else if (dst > conns.size ()) |
481 | else if (dst > conns.size ()) |
453 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
482 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
454 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
483 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
455 | else |
484 | else |
456 | { |
485 | { |
457 | connection *c = conns[src - 1]; |
486 | connection *c = conns[src - 1]; |
458 | |
487 | |
459 | if (dst == 0) |
488 | if (dst == 0) |
460 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
489 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."), |
461 | c->conf->nodename, (const char *)rsi); |
490 | c->conf->nodename, (const char *)rsi); |
462 | else if (dst != THISNODE->id) |
491 | else if (dst != THISNODE->id) |
463 | { |
492 | { |
464 | if (THISNODE->routerprio) |
493 | if (THISNODE->routerprio) |
465 | // the tos setting gets lost here. who cares. |
494 | // the tos setting gets lost here. who cares. |
466 | conns[dst - 1]->inject_vpn_packet (pkt); |
495 | conns[dst - 1]->inject_vpn_packet (pkt); |
467 | else |
496 | else |
468 | slog (L_WARN, |
497 | slog (L_WARN, |
469 | _("%s(%s): forwarding request (=> %s), but we are no router"), |
498 | _("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."), |
470 | c->conf->nodename, (const char *)rsi, |
499 | c->conf->nodename, (const char *)rsi, |
471 | conns[dst - 1]->conf->nodename); |
500 | conns[dst - 1]->conf->nodename); |
472 | } |
501 | } |
473 | else |
502 | else |
474 | c->recv_vpn_packet (pkt, rsi); |
503 | c->recv_vpn_packet (pkt, rsi); |
… | |
… | |
497 | #if ENABLE_DNS |
526 | #if ENABLE_DNS |
498 | case PROT_DNSv4: |
527 | case PROT_DNSv4: |
499 | return send_dnsv4_packet (pkt, si, tos); |
528 | return send_dnsv4_packet (pkt, si, tos); |
500 | #endif |
529 | #endif |
501 | default: |
530 | default: |
502 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
531 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
503 | } |
532 | } |
504 | |
533 | |
505 | return false; |
534 | return false; |
506 | } |
535 | } |
507 | |
536 | |
… | |
… | |
529 | recv_vpn_packet (pkt, si); |
558 | recv_vpn_packet (pkt, si); |
530 | } |
559 | } |
531 | else |
560 | else |
532 | { |
561 | { |
533 | // probably ECONNRESET or somesuch |
562 | // probably ECONNRESET or somesuch |
534 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
563 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
535 | } |
564 | } |
536 | |
565 | |
537 | delete pkt; |
566 | delete pkt; |
538 | } |
567 | } |
539 | else |
568 | else |
540 | { |
569 | { |
541 | slog (L_ERR, |
570 | slog (L_ERR, |
542 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
571 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
543 | revents); |
572 | revents); |
544 | exit (EXIT_FAILURE); |
573 | exit (EXIT_FAILURE); |
545 | } |
574 | } |
546 | } |
575 | } |
547 | |
576 | |
… | |
… | |
577 | } |
606 | } |
578 | } |
607 | } |
579 | else |
608 | else |
580 | { |
609 | { |
581 | // probably ECONNRESET or somesuch |
610 | // probably ECONNRESET or somesuch |
582 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
611 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
583 | } |
612 | } |
584 | |
613 | |
585 | delete pkt; |
614 | delete pkt; |
586 | } |
615 | } |
587 | else |
616 | else |
588 | { |
617 | { |
589 | slog (L_ERR, |
618 | slog (L_ERR, |
590 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
619 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
591 | revents); |
620 | revents); |
592 | exit (EXIT_FAILURE); |
621 | exit (EXIT_FAILURE); |
593 | } |
622 | } |
594 | } |
623 | } |
595 | #endif |
624 | #endif |
… | |
… | |
615 | recv_vpn_packet (pkt, si); |
644 | recv_vpn_packet (pkt, si); |
616 | } |
645 | } |
617 | else |
646 | else |
618 | { |
647 | { |
619 | // probably ECONNRESET or somesuch |
648 | // probably ECONNRESET or somesuch |
620 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
649 | slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno)); |
621 | } |
650 | } |
622 | |
651 | |
623 | delete pkt; |
652 | delete pkt; |
624 | } |
653 | } |
625 | else |
654 | else |
626 | { |
655 | { |
627 | slog (L_ERR, |
656 | slog (L_ERR, |
628 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
657 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
629 | revents); |
658 | revents); |
630 | exit (EXIT_FAILURE); |
659 | exit (EXIT_FAILURE); |
631 | } |
660 | } |
632 | } |
661 | } |
633 | |
662 | |
… | |
… | |
682 | { |
711 | { |
683 | slog (L_INFO, _("preparing shutdown...")); |
712 | slog (L_INFO, _("preparing shutdown...")); |
684 | |
713 | |
685 | shutdown_all (); |
714 | shutdown_all (); |
686 | remove_pid (conf.pidfilename); |
715 | remove_pid (conf.pidfilename); |
687 | slog (L_INFO, _("terminating")); |
716 | slog (L_INFO, _("exiting.")); |
688 | exit (EXIT_SUCCESS); |
717 | exit (EXIT_SUCCESS); |
689 | } |
718 | } |
690 | |
719 | |
691 | if (events & EVENT_RECONNECT) |
720 | if (events & EVENT_RECONNECT) |
692 | { |
721 | { |
693 | slog (L_INFO, _("forced reconnect")); |
722 | slog (L_INFO, _("forced reconnect.")); |
694 | |
723 | |
695 | reconnect_all (); |
724 | reconnect_all (); |
696 | } |
725 | } |
697 | |
726 | |
698 | events = 0; |
727 | events = 0; |
… | |
… | |
714 | |
743 | |
715 | conns.clear (); |
744 | conns.clear (); |
716 | |
745 | |
717 | connection_init (); |
746 | connection_init (); |
718 | |
747 | |
719 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
748 | for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i) |
720 | i != conf.nodes.end (); ++i) |
749 | conns.push_back (new connection (this, *i)); |
721 | { |
750 | |
722 | connection *conn = new connection (this, *i); |
751 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
723 | conns.push_back (conn); |
|
|
724 | conn->establish_connection (); |
752 | (*c)->establish_connection (); |
725 | } |
|
|
726 | } |
753 | } |
727 | |
754 | |
728 | connection *vpn::find_router () |
755 | bool vpn::can_direct (conf_node *src, conf_node *dst) const |
729 | { |
756 | { |
730 | u32 prio = 1; |
757 | return src != dst |
|
|
758 | && src->may_direct (dst) |
|
|
759 | && dst->may_direct (src) |
|
|
760 | && (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS) |
|
|
761 | || (src->protocols & dst->connectable_protocols ())); |
|
|
762 | } |
|
|
763 | |
|
|
764 | // only works for indirect and routed connections: find a router |
|
|
765 | // from THISNODE to dst |
|
|
766 | connection *vpn::find_router_for (const connection *dst) |
|
|
767 | { |
731 | connection *router = 0; |
768 | connection *router = 0; |
732 | |
769 | |
|
|
770 | // first try to find a router with a direct connection |
|
|
771 | { |
|
|
772 | u32 prio = 1; |
|
|
773 | |
|
|
774 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
775 | { |
|
|
776 | connection *c = *i; |
|
|
777 | |
|
|
778 | if (c->conf->routerprio > prio |
|
|
779 | && c->conf != THISNODE |
|
|
780 | && c != dst |
|
|
781 | && can_direct (c->conf, dst->conf)) |
|
|
782 | { |
|
|
783 | if (c->ictx && c->octx) |
|
|
784 | { |
|
|
785 | prio = c->conf->routerprio; |
|
|
786 | router = c; |
|
|
787 | } |
|
|
788 | else |
|
|
789 | c->establish_connection (); |
|
|
790 | } |
|
|
791 | } |
|
|
792 | } |
|
|
793 | |
|
|
794 | if (router) |
|
|
795 | return router; |
|
|
796 | |
|
|
797 | // second try find the router with the highest priority higher than ours |
|
|
798 | { |
|
|
799 | u32 prio = 1; |
|
|
800 | |
|
|
801 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
802 | { |
|
|
803 | connection *c = *i; |
|
|
804 | |
|
|
805 | if (c->conf->routerprio > prio |
|
|
806 | && c->conf->routerprio > THISNODE->routerprio |
|
|
807 | && c != dst |
|
|
808 | && c->conf != THISNODE) |
|
|
809 | { |
|
|
810 | if (c->ictx && c->octx) |
|
|
811 | { |
|
|
812 | prio = c->conf->routerprio; |
|
|
813 | router = c; |
|
|
814 | } |
|
|
815 | else |
|
|
816 | c->establish_connection (); |
|
|
817 | } |
|
|
818 | } |
|
|
819 | } |
|
|
820 | return router; |
|
|
821 | } |
|
|
822 | |
|
|
823 | void vpn::connection_established (connection *c) |
|
|
824 | { |
733 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
825 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
734 | { |
826 | { |
735 | connection *c = *i; |
827 | connection *o = *i; |
736 | |
828 | |
737 | if (c->conf->routerprio > prio |
829 | if (!o->is_direct |
738 | && c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use |
830 | && o->si.valid () |
739 | && c->ictx && c->octx |
831 | && c->si != o->si |
740 | && c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode |
832 | && c == find_router_for (o)) |
741 | { |
|
|
742 | prio = c->conf->routerprio; |
|
|
743 | router = c; |
|
|
744 | } |
833 | { |
|
|
834 | slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."), |
|
|
835 | o->conf->nodename, c->conf->nodename); |
|
|
836 | o->rekey (); |
|
|
837 | } |
745 | } |
838 | } |
746 | |
|
|
747 | return router; |
|
|
748 | } |
839 | } |
749 | |
840 | |
750 | void vpn::send_connect_request (int id) |
841 | void vpn::send_connect_request (connection *c) |
751 | { |
842 | { |
752 | connection *c = find_router (); |
843 | connection *r = find_router_for (c); |
753 | |
844 | |
754 | if (c) |
845 | if (r) |
|
|
846 | { |
|
|
847 | slog (L_TRACE, _("%s: no way to connect, sending mediated connection request via %s."), |
|
|
848 | c->conf->nodename, r->conf->nodename); |
755 | c->send_connect_request (id); |
849 | r->send_connect_request (c->conf->id); |
|
|
850 | } |
756 | else |
851 | else |
757 | // no router found, aggressively connect to all routers |
852 | slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect."), |
758 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
853 | c->conf->nodename); |
759 | if ((*i)->conf->routerprio && (*i)->conf != THISNODE) |
|
|
760 | (*i)->establish_connection (); |
|
|
761 | } |
854 | } |
762 | |
855 | |
763 | void |
856 | void |
764 | connection::dump_status () |
857 | connection::dump_status () |
765 | { |
858 | { |
766 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
859 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
767 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
860 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
768 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
861 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
769 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
862 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
770 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
863 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
771 | slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"), |
|
|
772 | (long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at)); |
|
|
773 | } |
864 | } |
774 | |
865 | |
775 | void |
866 | void |
776 | vpn::dump_status () |
867 | vpn::dump_status () |
777 | { |
868 | { |