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/cvs/gvpe/src/vpn.C
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Comparing gvpe/src/vpn.C (file contents):
Revision 1.20 by pcg, Thu Oct 16 14:12:00 2003 UTC vs.
Revision 1.22 by pcg, Sat Jan 17 01:18:36 2004 UTC

1/* 1/*
2 vpn.C -- handle the protocol, encryption, handshaking etc. 2 vpn.C -- handle the protocol, encryption, handshaking etc.
3 Copyright (C) 2003 Marc Lehmann <pcg@goof.com> 3 Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com>
4 4
5 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
6 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
7 the Free Software Foundation; either version 2 of the License, or 7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version. 8 (at your option) any later version.
… …
54 mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion 54 mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
55 mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round 55 mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
56 mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again 56 mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
57 57
58 char *env; 58 char *env;
59 asprintf (&env, "CONFBASE=%s", confbase); 59 asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
60 putenv (env);
61 asprintf (&env, "NODENAME=%s", THISNODE->nodename); 60 asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env);
62 putenv (env);
63 asprintf (&env, "NODEID=%d", THISNODE->id); 61 asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
64 putenv (env);
65 asprintf (&env, "IFNAME=%s", tap->interface ()); 62 asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
66 putenv (env); 63 asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
64 asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
67 asprintf (&env, "MTU=%d", mtu); 65 asprintf (&env, "MTU=%d", mtu); putenv (env);
68 putenv (env);
69 asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", 66 asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",
70 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, 67 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
71 THISNODE->id & 0xff); 68 THISNODE->id & 0xff);
72 putenv (env); 69 putenv (env);
73 70
… …
104 { 101 {
105 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));
106 exit (1); 103 exit (1);
107 } 104 }
108 105
109 ipv4_ev_watcher.start (ipv4_fd, POLLIN); 106 ipv4_ev_watcher.start (ipv4_fd, EVENT_READ);
110 } 107 }
111 108
112 udpv4_fd = -1; 109 udpv4_fd = -1;
113 110
114 if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) 111 if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
… …
142 { 139 {
143 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));
144 exit (1); 141 exit (1);
145 } 142 }
146 143
147 udpv4_ev_watcher.start (udpv4_fd, POLLIN); 144 udpv4_ev_watcher.start (udpv4_fd, EVENT_READ);
148 } 145 }
149 146
150 icmpv4_fd = -1; 147 icmpv4_fd = -1;
151 148
152#if ENABLE_ICMP 149#if ENABLE_ICMP
… …
186 { 183 {
187 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));
188 exit (1); 185 exit (1);
189 } 186 }
190 187
191 icmpv4_ev_watcher.start (icmpv4_fd, POLLIN); 188 icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ);
192 } 189 }
193#endif 190#endif
194 191
195 tcpv4_fd = -1; 192 tcpv4_fd = -1;
196 193
… …
222 { 219 {
223 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));
224 exit (1); 221 exit (1);
225 } 222 }
226 223
227 tcpv4_ev_watcher.start (tcpv4_fd, POLLIN); 224 tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ);
228 } 225 }
229#endif 226#endif
230 227
231 tap = new tap_device (); 228 tap = new tap_device ();
232 if (!tap) //D this, of course, never catches 229 if (!tap) //D this, of course, never catches
… …
235 exit (1); 232 exit (1);
236 } 233 }
237 234
238 run_script (run_script_cb (this, &vpn::script_if_up), true); 235 run_script (run_script_cb (this, &vpn::script_if_up), true);
239 236
240 tap_ev_watcher.start (tap->fd, POLLIN); 237 tap_ev_watcher.start (tap->fd, EVENT_READ);
241 238
242 reconnect_all (); 239 reconnect_all ();
243 240
244 return 0; 241 return 0;
245} 242}
… …
399} 396}
400 397
401void 398void
402vpn::ipv4_ev (io_watcher &w, short revents) 399vpn::ipv4_ev (io_watcher &w, short revents)
403{ 400{
404 if (revents & (POLLIN | POLLERR)) 401 if (revents & EVENT_READ)
405 { 402 {
406 vpn_packet *pkt = new vpn_packet; 403 vpn_packet *pkt = new vpn_packet;
407 struct sockaddr_in sa; 404 struct sockaddr_in sa;
408 socklen_t sa_len = sizeof (sa); 405 socklen_t sa_len = sizeof (sa);
409 int len; 406 int len;
… …
428 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); 425 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
429 } 426 }
430 427
431 delete pkt; 428 delete pkt;
432 } 429 }
433 else if (revents & POLLHUP)
434 {
435 // this cannot ;) happen on udp sockets
436 slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
437 exit (1);
438 }
439 else 430 else
440 { 431 {
441 slog (L_ERR, 432 slog (L_ERR,
442 _("FATAL: unknown revents %08x in socket, terminating\n"), 433 _("FATAL: unknown revents %08x in socket, terminating\n"),
443 revents); 434 revents);
… …
447 438
448#if ENABLE_ICMP 439#if ENABLE_ICMP
449void 440void
450vpn::icmpv4_ev (io_watcher &w, short revents) 441vpn::icmpv4_ev (io_watcher &w, short revents)
451{ 442{
452 if (revents & (POLLIN | POLLERR)) 443 if (revents & EVENT_READ)
453 { 444 {
454 vpn_packet *pkt = new vpn_packet; 445 vpn_packet *pkt = new vpn_packet;
455 struct sockaddr_in sa; 446 struct sockaddr_in sa;
456 socklen_t sa_len = sizeof (sa); 447 socklen_t sa_len = sizeof (sa);
457 int len; 448 int len;
… …
482 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); 473 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
483 } 474 }
484 475
485 delete pkt; 476 delete pkt;
486 } 477 }
487 else if (revents & POLLHUP)
488 {
489 // this cannot ;) happen on udp sockets
490 slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
491 exit (1);
492 }
493 else 478 else
494 { 479 {
495 slog (L_ERR, 480 slog (L_ERR,
496 _("FATAL: unknown revents %08x in socket, terminating\n"), 481 _("FATAL: unknown revents %08x in socket, terminating\n"),
497 revents); 482 revents);
… …
501#endif 486#endif
502 487
503void 488void
504vpn::udpv4_ev (io_watcher &w, short revents) 489vpn::udpv4_ev (io_watcher &w, short revents)
505{ 490{
506 if (revents & (POLLIN | POLLERR)) 491 if (revents & EVENT_READ)
507 { 492 {
508 vpn_packet *pkt = new vpn_packet; 493 vpn_packet *pkt = new vpn_packet;
509 struct sockaddr_in sa; 494 struct sockaddr_in sa;
510 socklen_t sa_len = sizeof (sa); 495 socklen_t sa_len = sizeof (sa);
511 int len; 496 int len;
… …
526 slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); 511 slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
527 } 512 }
528 513
529 delete pkt; 514 delete pkt;
530 } 515 }
531 else if (revents & POLLHUP)
532 {
533 // this cannot ;) happen on udp sockets
534 slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
535 exit (1);
536 }
537 else 516 else
538 { 517 {
539 slog (L_ERR, 518 slog (L_ERR,
540 _("FATAL: unknown revents %08x in socket, terminating\n"), 519 _("FATAL: unknown revents %08x in socket, terminating\n"),
541 revents); 520 revents);
… …
544} 523}
545 524
546void 525void
547vpn::tap_ev (io_watcher &w, short revents) 526vpn::tap_ev (io_watcher &w, short revents)
548{ 527{
549 if (revents & POLLIN) 528 if (revents & EVENT_READ)
550 { 529 {
551 /* process data */ 530 /* process data */
552 tap_packet *pkt; 531 tap_packet *pkt;
553 532
554 pkt = tap->recv (); 533 pkt = tap->recv ();
… …
579 inject_data_packet (pkt, dst); 558 inject_data_packet (pkt, dst);
580 } 559 }
581 560
582 delete pkt; 561 delete pkt;
583 } 562 }
584 else if (revents & (POLLHUP | POLLERR))
585 {
586 slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating."));
587 exit (1);
588 }
589 else 563 else
590 abort (); 564 abort ();
591} 565}
592 566
593void 567void
… …
598 if (events & EVENT_SHUTDOWN) 572 if (events & EVENT_SHUTDOWN)
599 { 573 {
600 slog (L_INFO, _("preparing shutdown...")); 574 slog (L_INFO, _("preparing shutdown..."));
601 575
602 shutdown_all (); 576 shutdown_all ();
603
604 remove_pid (pidfilename); 577 remove_pid (pidfilename);
605
606 slog (L_INFO, _("terminating")); 578 slog (L_INFO, _("terminating"));
607
608 exit (0); 579 exit (0);
609 } 580 }
610 581
611 if (events & EVENT_RECONNECT) 582 if (events & EVENT_RECONNECT)
612 { 583 {
… …
615 reconnect_all (); 586 reconnect_all ();
616 } 587 }
617 588
618 events = 0; 589 events = 0;
619 } 590 }
620
621 w.at = TSTAMP_CANCEL;
622} 591}
623 592
624void 593void
625vpn::shutdown_all () 594vpn::shutdown_all ()
626{ 595{

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