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Comparing gvpe/src/vpn.C (file contents):
Revision 1.28 by pcg, Thu Mar 3 16:54:34 2005 UTC vs.
Revision 1.33 by pcg, Wed Mar 23 21:55:39 2005 UTC

… …
46 46
47vpn network; // THE vpn (bad design...) 47vpn network; // THE vpn (bad design...)
48 48
49///////////////////////////////////////////////////////////////////////////// 49/////////////////////////////////////////////////////////////////////////////
50 50
51const char *vpn::script_if_up () 51void
52vpn::script_init_env ()
52{ 53{
53 // the tunnel device mtu should be the physical mtu - overhead 54 // the tunnel device mtu should be the physical mtu - overhead
54 // the tricky part is rounding to the cipher key blocksize 55 // the tricky part is rounding to the cipher key blocksize
55 int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; 56 int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
56 mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion 57 mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
… …
65 asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); 66 asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
66 asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); 67 asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
67 asprintf (&env, "MTU=%d", mtu); putenv (env); 68 asprintf (&env, "MTU=%d", mtu); putenv (env);
68 asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", 69 asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x",
69 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, 70 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8,
70 THISNODE->id & 0xff); 71 THISNODE->id & 0xff); putenv (env);
71 putenv (env);
72 72
73 // TODO: info for other nodes, maybe?
74}
75
76const char *vpn::script_if_init ()
77{
78 script_init_env ();
79
80 return tap->if_up ();
81}
82
83const char *vpn::script_if_up ()
84{
85 script_init_env ();
86
87 char *filename;
88 asprintf (&filename,
89 "%s/%s",
90 confbase,
73 return ::conf.script_if_up ? ::conf.script_if_up : "if-up"; 91 ::conf.script_if_up ? ::conf.script_if_up : "if-up");
92
93 return filename;
74} 94}
75 95
76int 96int
77vpn::setup () 97vpn::setup ()
78{ 98{
… …
228#endif 248#endif
229 249
230#if ENABLE_DNS 250#if ENABLE_DNS
231 if (THISNODE->protocols & PROT_DNSv4) 251 if (THISNODE->protocols & PROT_DNSv4)
232 { 252 {
253 dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
254
233 dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); 255 dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
234 256
235 if (dnsv4_fd < 0) 257 if (dnsv4_fd < 0)
236 return -1; 258 return -1;
259
260#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
261 // this I really consider a linux bug. I am neither connected
262 // nor do I fragment myself. Linux still sets DF and doesn't
263 // fragment for me sometimes.
264 {
265 int oval = IP_PMTUDISC_DONT;
266 setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
267 }
268#endif
237 269
238 // standard daemon practise... 270 // standard daemon practise...
239 { 271 {
240 int oval = 1; 272 int oval = 1;
241 setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); 273 setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
242 } 274 }
243 275
244 sockinfo si (THISNODE, PROT_DNSv4); 276 sockinfo si (THISNODE->dns_hostname,
277 THISNODE->dns_hostname ? THISNODE->dns_port : 0,
278 PROT_DNSv4);
245 279
246 if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) 280 if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
247 { 281 {
248 slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); 282 slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
249 exit (EXIT_FAILURE); 283 exit (EXIT_FAILURE);
… …
258 { 292 {
259 slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); 293 slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
260 exit (EXIT_FAILURE); 294 exit (EXIT_FAILURE);
261 } 295 }
262 296
297 if (tap->if_up () &&
298 !run_script (run_script_cb (this, &vpn::script_if_init), true))
299 {
300 slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
301 tap->if_up ());
302 exit (EXIT_FAILURE);
303 }
304
263 run_script (run_script_cb (this, &vpn::script_if_up), true); 305 if (!run_script (run_script_cb (this, &vpn::script_if_up), true))
306 {
307 slog (L_ERR, _("if-up command execution failed, exiting."));
308 exit (EXIT_FAILURE);
309 }
264 310
265 tap_ev_watcher.start (tap->fd, EVENT_READ); 311 tap_ev_watcher.start (tap->fd, EVENT_READ);
266 312
267 reconnect_all (); 313 reconnect_all ();
268 314
… …
393 else 439 else
394 c->recv_vpn_packet (pkt, rsi); 440 c->recv_vpn_packet (pkt, rsi);
395 } 441 }
396} 442}
397 443
444bool
445vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
446{
447 switch (si.prot)
448 {
449 case PROT_IPv4:
450 return send_ipv4_packet (pkt, si, tos);
451 case PROT_UDPv4:
452 return send_udpv4_packet (pkt, si, tos);
453#if ENABLE_TCP
454 case PROT_TCPv4:
455 return send_tcpv4_packet (pkt, si, tos);
456#endif
457#if ENABLE_ICMP
458 case PROT_ICMPv4:
459 return send_icmpv4_packet (pkt, si, tos);
460#endif
461#if ENABLE_DNS
462 case PROT_DNSv4:
463 return send_dnsv4_packet (pkt, si, tos);
464#endif
465
466 default:
467 slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
468 }
469
470 return false;
471}
472
398void 473void
399vpn::ipv4_ev (io_watcher &w, short revents) 474vpn::ipv4_ev (io_watcher &w, short revents)
400{ 475{
401 if (revents & EVENT_READ) 476 if (revents & EVENT_READ)
402 { 477 {
… …
411 486
412 if (len > 0) 487 if (len > 0)
413 { 488 {
414 pkt->len = len; 489 pkt->len = len;
415 490
416 // raw sockets deliver the ipv4, but don't expect it on sends 491 // raw sockets deliver the ipv4 header, but don't expect it on sends
417 // this is slow, but...
418 pkt->skip_hdr (IP_OVERHEAD); 492 pkt->skip_hdr (IP_OVERHEAD);
419 493
420 recv_vpn_packet (pkt, si); 494 recv_vpn_packet (pkt, si);
421 } 495 }
422 else 496 else
… …
428 delete pkt; 502 delete pkt;
429 } 503 }
430 else 504 else
431 { 505 {
432 slog (L_ERR, 506 slog (L_ERR,
433 _("FATAL: unknown revents %08x in socket, terminating\n"), 507 _("FATAL: unknown revents %08x in socket, terminating\n"),
434 revents); 508 revents);
435 exit (EXIT_FAILURE); 509 exit (EXIT_FAILURE);
436 } 510 }
437} 511}
438 512
439#if ENABLE_ICMP 513#if ENABLE_ICMP
… …
540 int dst = mac2id (pkt->dst); 614 int dst = mac2id (pkt->dst);
541 int src = mac2id (pkt->src); 615 int src = mac2id (pkt->src);
542 616
543 if (src != THISNODE->id) 617 if (src != THISNODE->id)
544 { 618 {
545 slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); 619 slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
546 exit (EXIT_FAILURE); 620 exit (EXIT_FAILURE);
547 } 621 }
548 622
549 if (dst == THISNODE->id) 623 if (dst == THISNODE->id)
550 { 624 {

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