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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 1.35 by pcg, Fri Apr 8 16:12:49 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
57 mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round 58 mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round
58 mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again 59 mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again
59 60
60 char *env; 61 char *env;
61 asprintf (&env, "CONFBASE=%s", confbase); putenv (env); 62 asprintf (&env, "CONFBASE=%s", confbase); putenv (env);
62 asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env);
63 asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
64 asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); 63 asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env);
65 asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); 64 asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env);
66 asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); 65 asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env);
67 asprintf (&env, "MTU=%d", mtu); putenv (env); 66 asprintf (&env, "MTU=%d", mtu); putenv (env);
68 asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", 67 asprintf (&env, "NODES=%d", conns.size ()); putenv (env);
69 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, 68 asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env);
70 THISNODE->id & 0xff);
71 putenv (env);
72 69
70 conns [THISNODE->id - 1]->script_init_env ("");
71
72 for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
73 {
74 char ext[16];
75 snprintf (ext, 16, "_%d", (*c)->conf->id);
76 (*c)->script_init_env (ext);
77 }
78}
79
80const char *vpn::script_if_init ()
81{
82 script_init_env ();
83
84 return tap->if_up ();
85}
86
87const char *vpn::script_if_up ()
88{
89 script_init_env ();
90
91 char *filename;
92 asprintf (&filename,
93 "%s/%s",
94 confbase,
73 return ::conf.script_if_up ? ::conf.script_if_up : "if-up"; 95 ::conf.script_if_up ? ::conf.script_if_up : "if-up");
96
97 return filename;
74} 98}
75 99
76int 100int
77vpn::setup () 101vpn::setup ()
78{ 102{
… …
228#endif 252#endif
229 253
230#if ENABLE_DNS 254#if ENABLE_DNS
231 if (THISNODE->protocols & PROT_DNSv4) 255 if (THISNODE->protocols & PROT_DNSv4)
232 { 256 {
257 dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4);
258
233 dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); 259 dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
234 260
235 if (dnsv4_fd < 0) 261 if (dnsv4_fd < 0)
236 return -1; 262 return -1;
263
264# if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
265 // this I really consider a linux bug. I am neither connected
266 // nor do I fragment myself. Linux still sets DF and doesn't
267 // fragment for me sometimes.
268 {
269 int oval = IP_PMTUDISC_DONT;
270 setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
271 }
272# endif
237 273
238 // standard daemon practise... 274 // standard daemon practise...
239 { 275 {
240 int oval = 1; 276 int oval = 1;
241 setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); 277 setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
242 } 278 }
243 279
244 sockinfo si (THISNODE, PROT_DNSv4); 280 sockinfo si (THISNODE->dns_hostname,
281 THISNODE->dns_hostname ? THISNODE->dns_port : 0,
282 PROT_DNSv4);
245 283
246 if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) 284 if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ()))
247 { 285 {
248 slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); 286 slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno));
249 exit (EXIT_FAILURE); 287 exit (EXIT_FAILURE);
… …
251 289
252 dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); 290 dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ);
253 } 291 }
254#endif 292#endif
255 293
294 /////////////////////////////////////////////////////////////////////////////
295
296 reconnect_all ();
297
298 /////////////////////////////////////////////////////////////////////////////
299
256 tap = new tap_device (); 300 tap = new tap_device ();
257 if (!tap) //D this, of course, never catches 301 if (!tap) //D this, of course, never catches
258 { 302 {
259 slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); 303 slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
260 exit (EXIT_FAILURE); 304 exit (EXIT_FAILURE);
261 } 305 }
262 306
307 if (tap->if_up () &&
308 !run_script (run_script_cb (this, &vpn::script_if_init), true))
309 {
310 slog (L_ERR, _("interface initialization command '%s' failed, exiting."),
311 tap->if_up ());
312 exit (EXIT_FAILURE);
313 }
314
263 run_script (run_script_cb (this, &vpn::script_if_up), true); 315 if (!run_script (run_script_cb (this, &vpn::script_if_up), true))
316 {
317 slog (L_ERR, _("if-up command execution failed, exiting."));
318 exit (EXIT_FAILURE);
319 }
264 320
265 tap_ev_watcher.start (tap->fd, EVENT_READ); 321 tap_ev_watcher.start (tap->fd, EVENT_READ);
266
267 reconnect_all ();
268 322
269 return 0; 323 return 0;
270} 324}
271 325
272bool 326bool
… …
393 else 447 else
394 c->recv_vpn_packet (pkt, rsi); 448 c->recv_vpn_packet (pkt, rsi);
395 } 449 }
396} 450}
397 451
452bool
453vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
454{
455 switch (si.prot)
456 {
457 case PROT_IPv4:
458 return send_ipv4_packet (pkt, si, tos);
459 case PROT_UDPv4:
460 return send_udpv4_packet (pkt, si, tos);
461#if ENABLE_TCP
462 case PROT_TCPv4:
463 return send_tcpv4_packet (pkt, si, tos);
464#endif
465#if ENABLE_ICMP
466 case PROT_ICMPv4:
467 return send_icmpv4_packet (pkt, si, tos);
468#endif
469#if ENABLE_DNS
470 case PROT_DNSv4:
471 return send_dnsv4_packet (pkt, si, tos);
472#endif
473
474 default:
475 slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
476 }
477
478 return false;
479}
480
398void 481void
399vpn::ipv4_ev (io_watcher &w, short revents) 482vpn::ipv4_ev (io_watcher &w, short revents)
400{ 483{
401 if (revents & EVENT_READ) 484 if (revents & EVENT_READ)
402 { 485 {
… …
411 494
412 if (len > 0) 495 if (len > 0)
413 { 496 {
414 pkt->len = len; 497 pkt->len = len;
415 498
416 // raw sockets deliver the ipv4, but don't expect it on sends 499 // raw sockets deliver the ipv4 header, but don't expect it on sends
417 // this is slow, but...
418 pkt->skip_hdr (IP_OVERHEAD); 500 pkt->skip_hdr (IP_OVERHEAD);
419 501
420 recv_vpn_packet (pkt, si); 502 recv_vpn_packet (pkt, si);
421 } 503 }
422 else 504 else
… …
428 delete pkt; 510 delete pkt;
429 } 511 }
430 else 512 else
431 { 513 {
432 slog (L_ERR, 514 slog (L_ERR,
433 _("FATAL: unknown revents %08x in socket, terminating\n"), 515 _("FATAL: unknown revents %08x in socket, terminating\n"),
434 revents); 516 revents);
435 exit (EXIT_FAILURE); 517 exit (EXIT_FAILURE);
436 } 518 }
437} 519}
438 520
439#if ENABLE_ICMP 521#if ENABLE_ICMP
… …
540 int dst = mac2id (pkt->dst); 622 int dst = mac2id (pkt->dst);
541 int src = mac2id (pkt->src); 623 int src = mac2id (pkt->src);
542 624
543 if (src != THISNODE->id) 625 if (src != THISNODE->id)
544 { 626 {
545 slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); 627 slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting."));
546 exit (EXIT_FAILURE); 628 exit (EXIT_FAILURE);
547 } 629 }
548 630
549 if (dst == THISNODE->id) 631 if (dst == THISNODE->id)
550 { 632 {

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