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Comparing gvpe/src/vpn.C (file contents):
Revision 1.23 by pcg, Thu Jan 29 18:55:10 2004 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) 2003-2004 Marc Lehmann <pcg@goof.com> 3 Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
4 4
5 This file is part of GVPE.
6
5 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify
6 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
7 the Free Software Foundation; either version 2 of the License, or 9 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version. 10 (at your option) any later version.
9 11
10 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,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details. 15 GNU General Public License for more details.
14 16
15 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
16 along with this program; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
17 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
18*/ 20*/
19 21
20#include "config.h" 22#include "config.h"
21 23
… …
223 225
224 tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); 226 tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ);
225 } 227 }
226#endif 228#endif
227 229
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 ()))
251 {
252 slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
253 exit (EXIT_FAILURE);
254 }
255
256 dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ);
257 }
258#endif
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 (EXIT_FAILURE); 264 exit (EXIT_FAILURE);
… …
237 tap_ev_watcher.start (tap->fd, EVENT_READ); 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{
… …
393 else 397 else
394 c->recv_vpn_packet (pkt, rsi); 398 c->recv_vpn_packet (pkt, rsi);
395 } 399 }
396} 400}
397 401
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
398void 431void
399vpn::ipv4_ev (io_watcher &w, short revents) 432vpn::ipv4_ev (io_watcher &w, short revents)
400{ 433{
401 if (revents & EVENT_READ) 434 if (revents & EVENT_READ)
402 { 435 {
… …
411 444
412 if (len > 0) 445 if (len > 0)
413 { 446 {
414 pkt->len = len; 447 pkt->len = len;
415 448
416 // 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
417 // this is slow, but...
418 pkt->skip_hdr (IP_OVERHEAD); 450 pkt->skip_hdr (IP_OVERHEAD);
419 451
420 recv_vpn_packet (pkt, si); 452 recv_vpn_packet (pkt, si);
421 } 453 }
422 else 454 else
… …
428 delete pkt; 460 delete pkt;
429 } 461 }
430 else 462 else
431 { 463 {
432 slog (L_ERR, 464 slog (L_ERR,
433 _("FATAL: unknown revents %08x in socket, terminating\n"), 465 _("FATAL: unknown revents %08x in socket, terminating\n"),
434 revents); 466 revents);
435 exit (EXIT_FAILURE); 467 exit (EXIT_FAILURE);
436 } 468 }
437} 469}
438 470
439#if ENABLE_ICMP 471#if ENABLE_ICMP
… …
540 int dst = mac2id (pkt->dst); 572 int dst = mac2id (pkt->dst);
541 int src = mac2id (pkt->src); 573 int src = mac2id (pkt->src);
542 574
543 if (src != THISNODE->id) 575 if (src != THISNODE->id)
544 { 576 {
545 slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); 577 slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
546 exit (EXIT_FAILURE); 578 exit (EXIT_FAILURE);
547 } 579 }
548 580
549 if (dst == THISNODE->id) 581 if (dst == THISNODE->id)
550 { 582 {
… …
572 if (events & EVENT_SHUTDOWN) 604 if (events & EVENT_SHUTDOWN)
573 { 605 {
574 slog (L_INFO, _("preparing shutdown...")); 606 slog (L_INFO, _("preparing shutdown..."));
575 607
576 shutdown_all (); 608 shutdown_all ();
577 remove_pid (pidfilename); 609 remove_pid (conf.pidfilename);
578 slog (L_INFO, _("terminating")); 610 slog (L_INFO, _("terminating"));
579 exit (EXIT_SUCCESS); 611 exit (EXIT_SUCCESS);
580 } 612 }
581 613
582 if (events & EVENT_RECONNECT) 614 if (events & EVENT_RECONNECT)
… …
608 connection_init (); 640 connection_init ();
609 641
610 for (configuration::node_vector::iterator i = conf.nodes.begin (); 642 for (configuration::node_vector::iterator i = conf.nodes.begin ();
611 i != conf.nodes.end (); ++i) 643 i != conf.nodes.end (); ++i)
612 { 644 {
613 connection *conn = new connection (this); 645 connection *conn = new connection (this, *i);
614
615 conn->conf = *i;
616 conns.push_back (conn); 646 conns.push_back (conn);
617
618 conn->establish_connection (); 647 conn->establish_connection ();
619 } 648 }
620} 649}
621 650
622connection *vpn::find_router () 651connection *vpn::find_router ()
… …
685, tcpv4_ev_watcher (this, &vpn::tcpv4_ev) 714, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
686#endif 715#endif
687#if ENABLE_ICMP 716#if ENABLE_ICMP
688, icmpv4_ev_watcher(this, &vpn::icmpv4_ev) 717, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
689#endif 718#endif
719#if ENABLE_DNS
720, dnsv4_ev_watcher (this, &vpn::dnsv4_ev)
721#endif
690, tap_ev_watcher (this, &vpn::tap_ev) 722, tap_ev_watcher (this, &vpn::tap_ev)
691{ 723{
692} 724}
693 725
694vpn::~vpn () 726vpn::~vpn ()

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