… | |
… | |
300 | sum += (sum >> 16); // carry |
300 | sum += (sum >> 16); // carry |
301 | |
301 | |
302 | return ~sum; |
302 | return ~sum; |
303 | } |
303 | } |
304 | |
304 | |
|
|
305 | #if ENABLE_ICMP |
305 | bool |
306 | bool |
306 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
307 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
307 | { |
308 | { |
308 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
309 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
309 | |
310 | |
… | |
… | |
317 | |
318 | |
318 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
319 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
319 | |
320 | |
320 | return true; |
321 | return true; |
321 | } |
322 | } |
|
|
323 | #endif |
322 | |
324 | |
323 | bool |
325 | bool |
324 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
326 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
325 | { |
327 | { |
326 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
328 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
… | |
… | |
348 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
350 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
349 | else |
351 | else |
350 | { |
352 | { |
351 | connection *c = conns[src - 1]; |
353 | connection *c = conns[src - 1]; |
352 | |
354 | |
353 | if (dst == 0 && !THISNODE->routerprio) |
355 | if (dst == 0) |
354 | slog (L_WARN, _("%s(%s): received broadcast, but we are no router"), |
356 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
355 | c->conf->nodename, (const char *)rsi); |
357 | c->conf->nodename, (const char *)rsi); |
356 | else if (dst != 0 && dst != THISNODE->id) |
358 | else if (dst != 0 && dst != THISNODE->id) |
357 | { |
359 | { |
358 | if (THISNODE->routerprio) |
360 | if (THISNODE->routerprio) |
359 | // the tos setting gets lost here. who cares. |
361 | // the tos setting gets lost here. who cares. |
… | |
… | |
414 | revents); |
416 | revents); |
415 | exit (1); |
417 | exit (1); |
416 | } |
418 | } |
417 | } |
419 | } |
418 | |
420 | |
|
|
421 | #if ENABLE_ICMP |
419 | void |
422 | void |
420 | vpn::icmpv4_ev (io_watcher &w, short revents) |
423 | vpn::icmpv4_ev (io_watcher &w, short revents) |
421 | { |
424 | { |
422 | if (revents & (POLLIN | POLLERR)) |
425 | if (revents & (POLLIN | POLLERR)) |
423 | { |
426 | { |
… | |
… | |
466 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
469 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
467 | revents); |
470 | revents); |
468 | exit (1); |
471 | exit (1); |
469 | } |
472 | } |
470 | } |
473 | } |
|
|
474 | #endif |
471 | |
475 | |
472 | void |
476 | void |
473 | vpn::udpv4_ev (io_watcher &w, short revents) |
477 | vpn::udpv4_ev (io_watcher &w, short revents) |
474 | { |
478 | { |
475 | if (revents & (POLLIN | POLLERR)) |
479 | if (revents & (POLLIN | POLLERR)) |
… | |
… | |
547 | if (dst != THISNODE->id) |
551 | if (dst != THISNODE->id) |
548 | conns[dst - 1]->inject_data_packet (pkt); |
552 | conns[dst - 1]->inject_data_packet (pkt); |
549 | } |
553 | } |
550 | else |
554 | else |
551 | { |
555 | { |
552 | // broadcast, first check router, then self, then english |
556 | // broadcast, this is ugly, but due to the security policy |
553 | connection *router = find_router (); |
557 | // we have to connect to all hosts... |
554 | |
|
|
555 | if (router) |
|
|
556 | router->inject_data_packet (pkt, true); |
|
|
557 | else |
|
|
558 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
558 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
559 | if ((*c)->conf != THISNODE) |
559 | if ((*c)->conf != THISNODE) |
560 | (*c)->inject_data_packet (pkt); |
560 | (*c)->inject_data_packet (pkt); |
561 | } |
561 | } |
562 | } |
562 | } |
563 | |
563 | |
564 | delete pkt; |
564 | delete pkt; |
565 | } |
565 | } |
… | |
… | |
639 | |
639 | |
640 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
640 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
641 | { |
641 | { |
642 | connection *c = *i; |
642 | connection *c = *i; |
643 | |
643 | |
644 | if (c->conf->routerprio >= prio |
644 | if (c->conf->routerprio > prio |
645 | && c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use |
645 | && c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use |
646 | && c->ictx && c->octx |
646 | && c->ictx && c->octx |
647 | && c->conf != THISNODE // redundant, since ictx==octx==0 always on thisnode |
647 | && c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode |
648 | && (!THISNODE->routerprio |
|
|
649 | || c->conf->routerprio <= THISNODE->routerprio)) |
|
|
650 | { |
648 | { |
651 | prio = c->conf->routerprio; |
649 | prio = c->conf->routerprio; |
652 | router = c; |
650 | router = c; |
653 | } |
651 | } |
654 | } |
652 | } |
… | |
… | |
663 | if (c) |
661 | if (c) |
664 | c->send_connect_request (id); |
662 | c->send_connect_request (id); |
665 | else |
663 | else |
666 | // no router found, aggressively connect to all routers |
664 | // no router found, aggressively connect to all routers |
667 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
665 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
668 | if ((*i)->conf->routerprio) |
666 | if ((*i)->conf->routerprio && (*i)->conf != THISNODE) |
669 | (*i)->establish_connection (); |
667 | (*i)->establish_connection (); |
670 | } |
668 | } |
671 | |
669 | |
672 | void |
670 | void |
673 | connection::dump_status () |
671 | connection::dump_status () |