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Comparing gvpe/src/vpn.C (file contents):
Revision 1.16 by pcg, Tue Oct 14 19:59:16 2003 UTC vs.
Revision 1.31 by pcg, Sat Mar 5 19:13:16 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) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
3 4
5 This file is part of GVPE.
6
4 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by 8 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or 9 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version. 10 (at your option) any later version.
8 11
9 This program is distributed in the hope that it will be useful, 12 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details. 15 GNU General Public License for more details.
13 16
14 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
16 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17*/ 20*/
18 21
19#include "config.h" 22#include "config.h"
20 23
21#include <list> 24#include <list>
22 25
26#include <cstdio>
27#include <cstring>
23#include <cstdlib> 28#include <cstdlib>
24#include <cstring>
25#include <cstdio>
26 29
27#include <sys/types.h> 30#include <sys/types.h>
28#include <sys/socket.h> 31#include <sys/socket.h>
29#include <sys/wait.h> 32#include <sys/wait.h>
30#include <errno.h> 33#include <errno.h>
39 42
40#include "connection.h" 43#include "connection.h"
41#include "util.h" 44#include "util.h"
42#include "vpn.h" 45#include "vpn.h"
43 46
47vpn network; // THE vpn (bad design...)
48
44///////////////////////////////////////////////////////////////////////////// 49/////////////////////////////////////////////////////////////////////////////
45 50
46const char *vpn::script_if_up () 51const char *vpn::script_if_up ()
47{ 52{
48 // the tunnel device mtu should be the physical mtu - overhead 53 // the tunnel device mtu should be the physical mtu - overhead
51 mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion 56 mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
52 mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round 57 mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
53 mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again 58 mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
54 59
55 char *env; 60 char *env;
56 asprintf (&env, "CONFBASE=%s", confbase); 61 asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
57 putenv (env);
58 asprintf (&env, "NODENAME=%s", THISNODE->nodename); 62 asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env);
59 putenv (env);
60 asprintf (&env, "NODEID=%d", THISNODE->id); 63 asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
61 putenv (env);
62 asprintf (&env, "IFNAME=%s", tap->interface ()); 64 asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
63 putenv (env); 65 asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
66 asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
64 asprintf (&env, "MTU=%d", mtu); 67 asprintf (&env, "MTU=%d", mtu); putenv (env);
65 putenv (env);
66 asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", 68 asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",
67 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, 69 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
68 THISNODE->id & 0xff); 70 THISNODE->id & 0xff);
69 putenv (env); 71 putenv (env);
70 72
98 sockinfo si (THISNODE, PROT_IPv4); 100 sockinfo si (THISNODE, PROT_IPv4);
99 101
100 if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) 102 if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
101 { 103 {
102 slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); 104 slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
103 exit (1); 105 exit (EXIT_FAILURE);
104 } 106 }
105 107
106 ipv4_ev_watcher.start (ipv4_fd, POLLIN); 108 ipv4_ev_watcher.start (ipv4_fd, EVENT_READ);
107 } 109 }
108 110
109 udpv4_fd = -1; 111 udpv4_fd = -1;
110 112
111 if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) 113 if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
136 sockinfo si (THISNODE, PROT_UDPv4); 138 sockinfo si (THISNODE, PROT_UDPv4);
137 139
138 if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) 140 if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
139 { 141 {
140 slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); 142 slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
141 exit (1); 143 exit (EXIT_FAILURE);
142 } 144 }
143 145
144 udpv4_ev_watcher.start (udpv4_fd, POLLIN); 146 udpv4_ev_watcher.start (udpv4_fd, EVENT_READ);
145 } 147 }
146 148
147 icmpv4_fd = -1; 149 icmpv4_fd = -1;
148 150
149#if ENABLE_ICMP 151#if ENABLE_ICMP
180 sockinfo si (THISNODE, PROT_ICMPv4); 182 sockinfo si (THISNODE, PROT_ICMPv4);
181 183
182 if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) 184 if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
183 { 185 {
184 slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); 186 slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
185 exit (1); 187 exit (EXIT_FAILURE);
186 } 188 }
187 189
188 icmpv4_ev_watcher.start (icmpv4_fd, POLLIN); 190 icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ);
189 } 191 }
190#endif 192#endif
191 193
192 tcpv4_fd = -1; 194 tcpv4_fd = -1;
193 195
210 sockinfo si (THISNODE, PROT_TCPv4); 212 sockinfo si (THISNODE, PROT_TCPv4);
211 213
212 if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) 214 if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
213 { 215 {
214 slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); 216 slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
215 exit (1); 217 exit (EXIT_FAILURE);
216 } 218 }
217 219
218 if (listen (tcpv4_fd, 5)) 220 if (listen (tcpv4_fd, 5))
219 { 221 {
220 slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); 222 slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
221 exit (1); 223 exit (EXIT_FAILURE);
224 }
225
226 tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ);
227 }
228#endif
229
230#if ENABLE_DNS
231 if (THISNODE->protocols & PROT_DNSv4)
232 {
233 dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
234
235 dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
236
237 if (dnsv4_fd < 0)
238 return -1;
239
240 // standard daemon practise...
241 {
242 int oval = 1;
243 setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
244 }
245
246 sockinfo si (THISNODE->dns_hostname,
247 THISNODE->dns_hostname ? THISNODE->dns_port : 0,
248 PROT_DNSv4);
249
250 if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
222 } 251 {
252 slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
253 exit (EXIT_FAILURE);
254 }
223 255
224 tcpv4_ev_watcher.start (tcpv4_fd, POLLIN); 256 dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ);
225 } 257 }
226#endif 258#endif
227 259
228 tap = new tap_device (); 260 tap = new tap_device ();
229 if (!tap) //D this, of course, never catches 261 if (!tap) //D this, of course, never catches
230 { 262 {
231 slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); 263 slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
232 exit (1); 264 exit (EXIT_FAILURE);
233 } 265 }
234 266
235 run_script (run_script_cb (this, &vpn::script_if_up), true); 267 run_script (run_script_cb (this, &vpn::script_if_up), true);
236 268
237 tap_ev_watcher.start (tap->fd, POLLIN); 269 tap_ev_watcher.start (tap->fd, EVENT_READ);
238 270
239 reconnect_all (); 271 reconnect_all ();
240 272
241 return 0; 273 return 0;
242}
243
244// send a vpn packet out to other hosts
245bool
246vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
247{
248 switch (si.prot)
249 {
250 case PROT_IPv4:
251 return send_ipv4_packet (pkt, si, tos);
252
253 case PROT_UDPv4:
254 return send_udpv4_packet (pkt, si, tos);
255
256#if ENABLE_TCP
257 case PROT_TCPv4:
258 return send_tcpv4_packet (pkt, si, tos);
259#endif
260
261#if ENABLE_ICMP
262 case PROT_ICMPv4:
263 return send_icmpv4_packet (pkt, si, tos);
264#endif
265
266 default:
267 slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
268 return false;
269 }
270} 274}
271 275
272bool 276bool
273vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) 277vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
274{ 278{
332 setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); 336 setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
333#endif 337#endif
334 sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); 338 sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
335 339
336 return true; 340 return true;
341}
342
343void
344vpn::inject_data_packet (tap_packet *pkt, int dst)
345{
346 if (dst)
347 {
348 // unicast
349 if (dst != THISNODE->id)
350 conns[dst - 1]->inject_data_packet (pkt);
351 }
352 else
353 {
354 // broadcast, this is ugly, but due to the security policy
355 // we have to connect to all hosts...
356 for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
357 if ((*c)->conf != THISNODE)
358 (*c)->inject_data_packet (pkt, true);
359 }
337} 360}
338 361
339void 362void
340vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) 363vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
341{ 364{
358 connection *c = conns[src - 1]; 381 connection *c = conns[src - 1];
359 382
360 if (dst == 0) 383 if (dst == 0)
361 slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), 384 slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
362 c->conf->nodename, (const char *)rsi); 385 c->conf->nodename, (const char *)rsi);
363 else if (dst != 0 && dst != THISNODE->id) 386 else if (dst != THISNODE->id)
364 { 387 {
365 if (THISNODE->routerprio) 388 if (THISNODE->routerprio)
366 // the tos setting gets lost here. who cares. 389 // the tos setting gets lost here. who cares.
367 conns[dst - 1]->inject_vpn_packet (pkt); 390 conns[dst - 1]->inject_vpn_packet (pkt);
368 else 391 else
374 else 397 else
375 c->recv_vpn_packet (pkt, rsi); 398 c->recv_vpn_packet (pkt, rsi);
376 } 399 }
377} 400}
378 401
402bool
403vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
404{
405 switch (si.prot)
406 {
407 case PROT_IPv4:
408 return send_ipv4_packet (pkt, si, tos);
409 case PROT_UDPv4:
410 return send_udpv4_packet (pkt, si, tos);
411#if ENABLE_TCP
412 case PROT_TCPv4:
413 return send_tcpv4_packet (pkt, si, tos);
414#endif
415#if ENABLE_ICMP
416 case PROT_ICMPv4:
417 return send_icmpv4_packet (pkt, si, tos);
418#endif
419#if ENABLE_DNS
420 case PROT_DNSv4:
421 return send_dnsv4_packet (pkt, si, tos);
422#endif
423
424 default:
425 slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
426 }
427
428 return false;
429}
430
379void 431void
380vpn::ipv4_ev (io_watcher &w, short revents) 432vpn::ipv4_ev (io_watcher &w, short revents)
381{ 433{
382 if (revents & (POLLIN | POLLERR)) 434 if (revents & EVENT_READ)
383 { 435 {
384 vpn_packet *pkt = new vpn_packet; 436 vpn_packet *pkt = new vpn_packet;
385 struct sockaddr_in sa; 437 struct sockaddr_in sa;
386 socklen_t sa_len = sizeof (sa); 438 socklen_t sa_len = sizeof (sa);
387 int len; 439 int len;
392 444
393 if (len > 0) 445 if (len > 0)
394 { 446 {
395 pkt->len = len; 447 pkt->len = len;
396 448
397 // raw sockets deliver the ipv4, but don't expect it on sends 449 // raw sockets deliver the ipv4 header, but don't expect it on sends
398 // this is slow, but...
399 pkt->skip_hdr (IP_OVERHEAD); 450 pkt->skip_hdr (IP_OVERHEAD);
400 451
401 recv_vpn_packet (pkt, si); 452 recv_vpn_packet (pkt, si);
402 } 453 }
403 else 454 else
406 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); 457 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
407 } 458 }
408 459
409 delete pkt; 460 delete pkt;
410 } 461 }
411 else if (revents & POLLHUP)
412 {
413 // this cannot ;) happen on udp sockets
414 slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
415 exit (1);
416 }
417 else 462 else
418 { 463 {
419 slog (L_ERR, 464 slog (L_ERR,
420 _("FATAL: unknown revents %08x in socket, terminating\n"), 465 _("FATAL: unknown revents %08x in socket, terminating\n"),
421 revents); 466 revents);
422 exit (1); 467 exit (EXIT_FAILURE);
423 } 468 }
424} 469}
425 470
426#if ENABLE_ICMP 471#if ENABLE_ICMP
427void 472void
428vpn::icmpv4_ev (io_watcher &w, short revents) 473vpn::icmpv4_ev (io_watcher &w, short revents)
429{ 474{
430 if (revents & (POLLIN | POLLERR)) 475 if (revents & EVENT_READ)
431 { 476 {
432 vpn_packet *pkt = new vpn_packet; 477 vpn_packet *pkt = new vpn_packet;
433 struct sockaddr_in sa; 478 struct sockaddr_in sa;
434 socklen_t sa_len = sizeof (sa); 479 socklen_t sa_len = sizeof (sa);
435 int len; 480 int len;
460 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); 505 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
461 } 506 }
462 507
463 delete pkt; 508 delete pkt;
464 } 509 }
465 else if (revents & POLLHUP)
466 {
467 // this cannot ;) happen on udp sockets
468 slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
469 exit (1);
470 }
471 else 510 else
472 { 511 {
473 slog (L_ERR, 512 slog (L_ERR,
474 _("FATAL: unknown revents %08x in socket, terminating\n"), 513 _("FATAL: unknown revents %08x in socket, terminating\n"),
475 revents); 514 revents);
476 exit (1); 515 exit (EXIT_FAILURE);
477 } 516 }
478} 517}
479#endif 518#endif
480 519
481void 520void
482vpn::udpv4_ev (io_watcher &w, short revents) 521vpn::udpv4_ev (io_watcher &w, short revents)
483{ 522{
484 if (revents & (POLLIN | POLLERR)) 523 if (revents & EVENT_READ)
485 { 524 {
486 vpn_packet *pkt = new vpn_packet; 525 vpn_packet *pkt = new vpn_packet;
487 struct sockaddr_in sa; 526 struct sockaddr_in sa;
488 socklen_t sa_len = sizeof (sa); 527 socklen_t sa_len = sizeof (sa);
489 int len; 528 int len;
504 slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); 543 slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
505 } 544 }
506 545
507 delete pkt; 546 delete pkt;
508 } 547 }
509 else if (revents & POLLHUP)
510 {
511 // this cannot ;) happen on udp sockets
512 slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
513 exit (1);
514 }
515 else 548 else
516 { 549 {
517 slog (L_ERR, 550 slog (L_ERR,
518 _("FATAL: unknown revents %08x in socket, terminating\n"), 551 _("FATAL: unknown revents %08x in socket, terminating\n"),
519 revents); 552 revents);
520 exit (1); 553 exit (EXIT_FAILURE);
521 } 554 }
522} 555}
523 556
524void 557void
525vpn::tap_ev (io_watcher &w, short revents) 558vpn::tap_ev (io_watcher &w, short revents)
526{ 559{
527 if (revents & POLLIN) 560 if (revents & EVENT_READ)
528 { 561 {
529 /* process data */ 562 /* process data */
530 tap_packet *pkt; 563 tap_packet *pkt;
531 564
532 pkt = tap->recv (); 565 pkt = tap->recv ();
533 566
567 if (!pkt)
568 return;
569
570 if (pkt->len > 14)
571 {
534 int dst = mac2id (pkt->dst); 572 int dst = mac2id (pkt->dst);
535 int src = mac2id (pkt->src); 573 int src = mac2id (pkt->src);
536 574
537 if (src != THISNODE->id) 575 if (src != THISNODE->id)
538 {
539 slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));
540 exit (1);
541 }
542
543 if (dst == THISNODE->id)
544 {
545 slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
546 exit (1);
547 }
548
549 if (dst > conns.size ())
550 slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
551 else
552 {
553 if (dst)
554 { 576 {
555 // unicast 577 slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
556 if (dst != THISNODE->id) 578 exit (EXIT_FAILURE);
557 conns[dst - 1]->inject_data_packet (pkt);
558 } 579 }
580
581 if (dst == THISNODE->id)
582 {
583 slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
584 exit (EXIT_FAILURE);
585 }
586
587 if (dst > conns.size ())
588 slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
559 else 589 else
560 {
561 // broadcast, this is ugly, but due to the security policy
562 // we have to connect to all hosts...
563 for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
564 if ((*c)->conf != THISNODE)
565 (*c)->inject_data_packet (pkt); 590 inject_data_packet (pkt, dst);
566 }
567 } 591 }
568 592
569 delete pkt; 593 delete pkt;
570 }
571 else if (revents & (POLLHUP | POLLERR))
572 {
573 slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
574 exit (1);
575 } 594 }
576 else 595 else
577 abort (); 596 abort ();
578} 597}
579 598
585 if (events & EVENT_SHUTDOWN) 604 if (events & EVENT_SHUTDOWN)
586 { 605 {
587 slog (L_INFO, _("preparing shutdown...")); 606 slog (L_INFO, _("preparing shutdown..."));
588 607
589 shutdown_all (); 608 shutdown_all ();
590
591 remove_pid (pidfilename); 609 remove_pid (conf.pidfilename);
592
593 slog (L_INFO, _("terminating")); 610 slog (L_INFO, _("terminating"));
594 611 exit (EXIT_SUCCESS);
595 exit (0);
596 } 612 }
597 613
598 if (events & EVENT_RECONNECT) 614 if (events & EVENT_RECONNECT)
599 { 615 {
600 slog (L_INFO, _("forced reconnect")); 616 slog (L_INFO, _("forced reconnect"));
602 reconnect_all (); 618 reconnect_all ();
603 } 619 }
604 620
605 events = 0; 621 events = 0;
606 } 622 }
607
608 w.at = TSTAMP_CANCEL;
609} 623}
610 624
611void 625void
612vpn::shutdown_all () 626vpn::shutdown_all ()
613{ 627{
626 connection_init (); 640 connection_init ();
627 641
628 for (configuration::node_vector::iterator i = conf.nodes.begin (); 642 for (configuration::node_vector::iterator i = conf.nodes.begin ();
629 i != conf.nodes.end (); ++i) 643 i != conf.nodes.end (); ++i)
630 { 644 {
631 connection *conn = new connection (this); 645 connection *conn = new connection (this, *i);
632
633 conn->conf = *i;
634 conns.push_back (conn); 646 conns.push_back (conn);
635
636 conn->establish_connection (); 647 conn->establish_connection ();
637 } 648 }
638} 649}
639 650
640connection *vpn::find_router () 651connection *vpn::find_router ()
703, tcpv4_ev_watcher (this, &vpn::tcpv4_ev) 714, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
704#endif 715#endif
705#if ENABLE_ICMP 716#if ENABLE_ICMP
706, icmpv4_ev_watcher(this, &vpn::icmpv4_ev) 717, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
707#endif 718#endif
719#if ENABLE_DNS
720, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)
721#endif
708, tap_ev_watcher (this, &vpn::tap_ev) 722, tap_ev_watcher (this, &vpn::tap_ev)
709{ 723{
710} 724}
711 725
712vpn::~vpn () 726vpn::~vpn ()

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