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Comparing gvpe/src/vpn.C (file contents):
Revision 1.27 by pcg, Tue Mar 1 06:27:20 2005 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
… …
226#endif 228#endif
227 229
228#if ENABLE_DNS 230#if ENABLE_DNS
229 if (THISNODE->protocols & PROT_DNSv4) 231 if (THISNODE->protocols & PROT_DNSv4)
230 { 232 {
233 dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
234
231 dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); 235 dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
232 236
233 if (dnsv4_fd < 0) 237 if (dnsv4_fd < 0)
234 return -1; 238 return -1;
235 239
236 // standard daemon practise... 240 // standard daemon practise...
237 { 241 {
238 int oval = 1; 242 int oval = 1;
239 setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); 243 setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
240 } 244 }
241 245
242 sockinfo si (THISNODE, PROT_DNSv4); 246 sockinfo si (THISNODE->dns_hostname,
247 THISNODE->dns_hostname ? THISNODE->dns_port : 0,
248 PROT_DNSv4);
243 249
244 if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) 250 if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
245 { 251 {
246 slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); 252 slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
247 exit (EXIT_FAILURE); 253 exit (EXIT_FAILURE);
… …
391 else 397 else
392 c->recv_vpn_packet (pkt, rsi); 398 c->recv_vpn_packet (pkt, rsi);
393 } 399 }
394} 400}
395 401
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
396void 431void
397vpn::ipv4_ev (io_watcher &w, short revents) 432vpn::ipv4_ev (io_watcher &w, short revents)
398{ 433{
399 if (revents & EVENT_READ) 434 if (revents & EVENT_READ)
400 { 435 {
… …
409 444
410 if (len > 0) 445 if (len > 0)
411 { 446 {
412 pkt->len = len; 447 pkt->len = len;
413 448
414 // 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
415 // this is slow, but...
416 pkt->skip_hdr (IP_OVERHEAD); 450 pkt->skip_hdr (IP_OVERHEAD);
417 451
418 recv_vpn_packet (pkt, si); 452 recv_vpn_packet (pkt, si);
419 } 453 }
420 else 454 else
… …
426 delete pkt; 460 delete pkt;
427 } 461 }
428 else 462 else
429 { 463 {
430 slog (L_ERR, 464 slog (L_ERR,
431 _("FATAL: unknown revents %08x in socket, terminating\n"), 465 _("FATAL: unknown revents %08x in socket, terminating\n"),
432 revents); 466 revents);
433 exit (EXIT_FAILURE); 467 exit (EXIT_FAILURE);
434 } 468 }
435} 469}
436 470
437#if ENABLE_ICMP 471#if ENABLE_ICMP
… …
538 int dst = mac2id (pkt->dst); 572 int dst = mac2id (pkt->dst);
539 int src = mac2id (pkt->src); 573 int src = mac2id (pkt->src);
540 574
541 if (src != THISNODE->id) 575 if (src != THISNODE->id)
542 { 576 {
543 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."));
544 exit (EXIT_FAILURE); 578 exit (EXIT_FAILURE);
545 } 579 }
546 580
547 if (dst == THISNODE->id) 581 if (dst == THISNODE->id)
548 { 582 {

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