… | |
… | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
16 | |
16 | |
17 | 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 |
18 | along with gvpe; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
19 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ |
20 | */ |
21 | |
21 | |
22 | #include "config.h" |
22 | #include "config.h" |
23 | |
|
|
24 | #include <cassert> |
|
|
25 | |
23 | |
26 | #include <list> |
24 | #include <list> |
27 | |
25 | |
28 | #include <openssl/rand.h> |
26 | #include <openssl/rand.h> |
29 | #include <openssl/evp.h> |
27 | #include <openssl/evp.h> |
30 | #include <openssl/rsa.h> |
28 | #include <openssl/rsa.h> |
31 | #include <openssl/err.h> |
29 | #include <openssl/err.h> |
32 | |
|
|
33 | #include "gettext.h" |
|
|
34 | |
30 | |
35 | #include "conf.h" |
31 | #include "conf.h" |
36 | #include "slog.h" |
32 | #include "slog.h" |
37 | #include "device.h" |
33 | #include "device.h" |
38 | #include "vpn.h" |
34 | #include "vpn.h" |
… | |
… | |
86 | require (EVP_DigestUpdate(&ctx, &id, sizeof id)); |
82 | require (EVP_DigestUpdate(&ctx, &id, sizeof id)); |
87 | require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0)); |
83 | require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0)); |
88 | EVP_MD_CTX_cleanup (&ctx); |
84 | EVP_MD_CTX_cleanup (&ctx); |
89 | } |
85 | } |
90 | |
86 | |
91 | struct rsa_entry { |
87 | struct rsa_entry |
|
|
88 | { |
92 | tstamp expire; |
89 | tstamp expire; |
93 | rsaid id; |
90 | rsaid id; |
94 | rsachallenge chg; |
91 | rsachallenge chg; |
95 | }; |
92 | }; |
96 | |
93 | |
97 | struct rsa_cache : list<rsa_entry> |
94 | struct rsa_cache : list<rsa_entry> |
98 | { |
95 | { |
99 | void cleaner_cb (time_watcher &w); time_watcher cleaner; |
96 | void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner; |
100 | |
97 | |
101 | bool find (const rsaid &id, rsachallenge &chg) |
98 | bool find (const rsaid &id, rsachallenge &chg) |
102 | { |
99 | { |
103 | for (iterator i = begin (); i != end (); ++i) |
100 | for (iterator i = begin (); i != end (); ++i) |
104 | { |
101 | { |
105 | if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW) |
102 | if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev_now ()) |
106 | { |
103 | { |
107 | memcpy (&chg, &i->chg, sizeof chg); |
104 | memcpy (&chg, &i->chg, sizeof chg); |
108 | |
105 | |
109 | erase (i); |
106 | erase (i); |
110 | return true; |
107 | return true; |
111 | } |
108 | } |
112 | } |
109 | } |
113 | |
110 | |
114 | if (cleaner.at < NOW) |
111 | if (!cleaner.is_active ()) |
115 | cleaner.start (NOW + RSA_TTL); |
112 | cleaner.again (); |
116 | |
113 | |
117 | return false; |
114 | return false; |
118 | } |
115 | } |
119 | |
116 | |
120 | void gen (rsaid &id, rsachallenge &chg) |
117 | void gen (rsaid &id, rsachallenge &chg) |
121 | { |
118 | { |
122 | rsa_entry e; |
119 | rsa_entry e; |
123 | |
120 | |
124 | RAND_bytes ((unsigned char *)&id, sizeof id); |
121 | RAND_bytes ((unsigned char *)&id, sizeof id); |
125 | RAND_bytes ((unsigned char *)&chg, sizeof chg); |
122 | RAND_bytes ((unsigned char *)&chg, sizeof chg); |
126 | |
123 | |
127 | e.expire = NOW + RSA_TTL; |
124 | e.expire = ev_now () + RSA_TTL; |
128 | e.id = id; |
125 | e.id = id; |
129 | memcpy (&e.chg, &chg, sizeof chg); |
126 | memcpy (&e.chg, &chg, sizeof chg); |
130 | |
127 | |
131 | push_back (e); |
128 | push_back (e); |
132 | |
129 | |
133 | if (cleaner.at < NOW) |
130 | if (!cleaner.is_active ()) |
134 | cleaner.start (NOW + RSA_TTL); |
131 | cleaner.again (); |
135 | } |
132 | } |
136 | |
133 | |
137 | rsa_cache () |
134 | rsa_cache () |
138 | : cleaner (this, &rsa_cache::cleaner_cb) |
135 | { |
139 | { } |
136 | cleaner.set<rsa_cache, &rsa_cache::cleaner_cb> (this); |
|
|
137 | cleaner.set (RSA_TTL, RSA_TTL); |
|
|
138 | } |
140 | |
139 | |
141 | } rsa_cache; |
140 | } rsa_cache; |
142 | |
141 | |
143 | void rsa_cache::cleaner_cb (time_watcher &w) |
142 | void rsa_cache::cleaner_cb (ev::timer &w, int revents) |
144 | { |
143 | { |
145 | if (!empty ()) |
144 | if (empty ()) |
|
|
145 | w.stop (); |
|
|
146 | else |
146 | { |
147 | { |
147 | w.start (NOW + RSA_TTL); |
|
|
148 | |
|
|
149 | for (iterator i = begin (); i != end (); ) |
148 | for (iterator i = begin (); i != end (); ) |
150 | if (i->expire <= NOW) |
149 | if (i->expire <= ev_now ()) |
151 | i = erase (i); |
150 | i = erase (i); |
152 | else |
151 | else |
153 | ++i; |
152 | ++i; |
154 | } |
153 | } |
155 | } |
154 | } |
… | |
… | |
193 | { |
192 | { |
194 | for (i = QUEUEDEPTH; --i > 0; ) |
193 | for (i = QUEUEDEPTH; --i > 0; ) |
195 | delete queue[i]; |
194 | delete queue[i]; |
196 | } |
195 | } |
197 | |
196 | |
198 | struct net_rateinfo { |
197 | struct net_rateinfo |
|
|
198 | { |
199 | u32 host; |
199 | u32 host; |
200 | double pcnt, diff; |
200 | double pcnt, diff; |
201 | tstamp last; |
201 | tstamp last; |
202 | }; |
202 | }; |
203 | |
203 | |
… | |
… | |
222 | iterator i; |
222 | iterator i; |
223 | |
223 | |
224 | for (i = begin (); i != end (); ) |
224 | for (i = begin (); i != end (); ) |
225 | if (i->host == host) |
225 | if (i->host == host) |
226 | break; |
226 | break; |
227 | else if (i->last < NOW - NRL_EXPIRE) |
227 | else if (i->last < ev_now () - NRL_EXPIRE) |
228 | i = erase (i); |
228 | i = erase (i); |
229 | else |
229 | else |
230 | i++; |
230 | i++; |
231 | |
231 | |
232 | if (i == end ()) |
232 | if (i == end ()) |
… | |
… | |
234 | net_rateinfo ri; |
234 | net_rateinfo ri; |
235 | |
235 | |
236 | ri.host = host; |
236 | ri.host = host; |
237 | ri.pcnt = 1.; |
237 | ri.pcnt = 1.; |
238 | ri.diff = NRL_MAXDIF; |
238 | ri.diff = NRL_MAXDIF; |
239 | ri.last = NOW; |
239 | ri.last = ev_now (); |
240 | |
240 | |
241 | push_front (ri); |
241 | push_front (ri); |
242 | |
242 | |
243 | return true; |
243 | return true; |
244 | } |
244 | } |
… | |
… | |
246 | { |
246 | { |
247 | net_rateinfo ri (*i); |
247 | net_rateinfo ri (*i); |
248 | erase (i); |
248 | erase (i); |
249 | |
249 | |
250 | ri.pcnt = ri.pcnt * NRL_ALPHA; |
250 | ri.pcnt = ri.pcnt * NRL_ALPHA; |
251 | ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last); |
251 | ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last); |
252 | |
252 | |
253 | ri.last = NOW; |
253 | ri.last = ev_now (); |
254 | |
254 | |
255 | double dif = ri.diff / ri.pcnt; |
255 | double dif = ri.diff / ri.pcnt; |
256 | |
256 | |
257 | bool send = dif > NRL_CUTOFF; |
257 | bool send = dif > NRL_CUTOFF; |
258 | |
258 | |
… | |
… | |
468 | f |= FEATURE_COMPRESSION; |
468 | f |= FEATURE_COMPRESSION; |
469 | #endif |
469 | #endif |
470 | #if ENABLE_ROHC |
470 | #if ENABLE_ROHC |
471 | f |= FEATURE_ROHC; |
471 | f |= FEATURE_ROHC; |
472 | #endif |
472 | #endif |
|
|
473 | #if ENABLE_BRIDGING |
|
|
474 | f |= FEATURE_BRIDGING; |
|
|
475 | #endif |
473 | return f; |
476 | return f; |
474 | } |
477 | } |
475 | }; |
478 | }; |
476 | |
479 | |
477 | void config_packet::setup (ptype type, int dst) |
480 | void config_packet::setup (ptype type, int dst) |
478 | { |
481 | { |
479 | prot_major = PROTOCOL_MAJOR; |
482 | prot_major = PROTOCOL_MAJOR; |
480 | prot_minor = PROTOCOL_MINOR; |
483 | prot_minor = PROTOCOL_MINOR; |
481 | randsize = RAND_SIZE; |
484 | randsize = RAND_SIZE; |
482 | hmaclen = HMACLENGTH; |
485 | hmaclen = HMACLENGTH; |
483 | flags = ENABLE_COMPRESSION ? 0x81 : 0x80; |
486 | flags = 0; |
484 | challengelen = sizeof (rsachallenge); |
487 | challengelen = sizeof (rsachallenge); |
485 | features = get_features (); |
488 | features = get_features (); |
486 | |
489 | |
487 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
490 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
488 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
491 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
… | |
… | |
498 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
501 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
499 | else if (randsize != RAND_SIZE) |
502 | else if (randsize != RAND_SIZE) |
500 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
503 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
501 | else if (hmaclen != HMACLENGTH) |
504 | else if (hmaclen != HMACLENGTH) |
502 | slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH); |
505 | slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH); |
503 | #if 0 // this implementation should handle all flag settings |
|
|
504 | else if (flags != curflags ()) |
|
|
505 | slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ()); |
|
|
506 | #endif |
|
|
507 | else if (challengelen != sizeof (rsachallenge)) |
506 | else if (challengelen != sizeof (rsachallenge)) |
508 | slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge)); |
507 | slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge)); |
509 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
508 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
510 | slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
509 | slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
511 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
510 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
… | |
… | |
587 | ///////////////////////////////////////////////////////////////////////////// |
586 | ///////////////////////////////////////////////////////////////////////////// |
588 | |
587 | |
589 | void |
588 | void |
590 | connection::connection_established () |
589 | connection::connection_established () |
591 | { |
590 | { |
|
|
591 | slog (L_TRACE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx); |
|
|
592 | |
592 | if (ictx && octx) |
593 | if (ictx && octx) |
593 | { |
594 | { |
594 | connectmode = conf->connectmode; |
595 | connectmode = conf->connectmode; |
595 | |
596 | |
596 | // make sure rekeying timeouts are slightly asymmetric |
597 | // make sure rekeying timeouts are slightly asymmetric |
597 | rekey.start (NOW + ::conf.rekey |
598 | ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0); |
598 | + (conf->id > THISNODE->id ? 10 : 0)); |
599 | rekey.start (rekey_interval, rekey_interval); |
599 | keepalive.start (NOW + ::conf.keepalive); |
600 | keepalive.start (::conf.keepalive); |
600 | |
601 | |
601 | // send queued packets |
602 | // send queued packets |
602 | if (ictx && octx) |
603 | if (ictx && octx) |
603 | { |
604 | { |
604 | while (tap_packet *p = (tap_packet *)data_queue.get ()) |
605 | while (tap_packet *p = (tap_packet *)data_queue.get ()) |
… | |
… | |
615 | } |
616 | } |
616 | } |
617 | } |
617 | else |
618 | else |
618 | { |
619 | { |
619 | retry_cnt = 0; |
620 | retry_cnt = 0; |
620 | establish_connection.start (NOW + 5); |
621 | establish_connection.start (5); |
621 | keepalive.stop (); |
622 | keepalive.stop (); |
622 | rekey.stop (); |
623 | rekey.stop (); |
623 | } |
624 | } |
624 | } |
625 | } |
625 | |
626 | |
… | |
… | |
631 | // mask out protocols we cannot establish |
632 | // mask out protocols we cannot establish |
632 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
633 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
633 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
634 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
634 | if (!conf->dns_port) protocol &= ~PROT_DNSv4; |
635 | if (!conf->dns_port) protocol &= ~PROT_DNSv4; |
635 | |
636 | |
|
|
637 | if (protocol |
|
|
638 | && (!conf->can_direct (THISNODE) |
|
|
639 | || !THISNODE->can_direct (conf))) |
|
|
640 | { |
|
|
641 | slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename); |
|
|
642 | protocol = 0; |
|
|
643 | } |
|
|
644 | |
636 | si.set (conf, protocol); |
645 | si.set (conf, protocol); |
637 | } |
646 | } |
638 | |
647 | |
639 | // ensure sockinfo is valid, forward if necessary |
648 | // ensure sockinfo is valid, forward if necessary |
640 | const sockinfo & |
649 | const sockinfo & |
… | |
… | |
644 | { |
653 | { |
645 | connection *r = vpn->find_router (); |
654 | connection *r = vpn->find_router (); |
646 | |
655 | |
647 | if (r) |
656 | if (r) |
648 | { |
657 | { |
649 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"), |
658 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"), |
650 | conf->nodename, r->conf->nodename); |
659 | conf->nodename, r->conf->nodename, (const char *)r->si); |
651 | return r->si; |
660 | return r->si; |
652 | } |
661 | } |
653 | else |
662 | else |
654 | slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
663 | slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
655 | conf->nodename); |
664 | conf->nodename); |
… | |
… | |
659 | } |
668 | } |
660 | |
669 | |
661 | void |
670 | void |
662 | connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
671 | connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
663 | { |
672 | { |
664 | bool ok; |
673 | if (!vpn->send_vpn_packet (pkt, si, tos)) |
665 | |
|
|
666 | switch (si.prot) |
|
|
667 | { |
|
|
668 | case PROT_IPv4: |
|
|
669 | ok = vpn->send_ipv4_packet (pkt, si, tos); break; |
|
|
670 | case PROT_UDPv4: |
|
|
671 | ok = vpn->send_udpv4_packet (pkt, si, tos); break; |
|
|
672 | #if ENABLE_TCP |
|
|
673 | case PROT_TCPv4: |
|
|
674 | ok = vpn->send_tcpv4_packet (pkt, si, tos); break; |
|
|
675 | #endif |
|
|
676 | #if ENABLE_ICMP |
|
|
677 | case PROT_ICMPv4: |
|
|
678 | ok = vpn->send_icmpv4_packet (pkt, si, tos); break; |
|
|
679 | #endif |
|
|
680 | #if ENABLE_DNS |
|
|
681 | case PROT_DNSv4: |
|
|
682 | ok = send_dnsv4_packet (pkt, si, tos); break; |
|
|
683 | #endif |
|
|
684 | |
|
|
685 | default: |
|
|
686 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
687 | ok = false; |
|
|
688 | } |
|
|
689 | |
|
|
690 | if (!ok) |
|
|
691 | reset_connection (); |
674 | reset_connection (); |
692 | } |
675 | } |
693 | |
676 | |
694 | void |
677 | void |
695 | connection::send_ping (const sockinfo &si, u8 pong) |
678 | connection::send_ping (const sockinfo &si, u8 pong) |
… | |
… | |
751 | } |
734 | } |
752 | |
735 | |
753 | void |
736 | void |
754 | connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) |
737 | connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) |
755 | { |
738 | { |
756 | slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n", |
739 | slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)", |
757 | conf->id, rid, (const char *)rsi); |
740 | conf->id, rid, (const char *)rsi); |
758 | |
741 | |
759 | connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); |
742 | connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); |
760 | |
743 | |
761 | r->hmac_set (octx); |
744 | r->hmac_set (octx); |
… | |
… | |
763 | |
746 | |
764 | delete r; |
747 | delete r; |
765 | } |
748 | } |
766 | |
749 | |
767 | void |
750 | void |
768 | connection::establish_connection_cb (time_watcher &w) |
751 | connection::establish_connection_cb (ev::timer &w, int revents) |
769 | { |
752 | { |
770 | if (!ictx |
753 | if (!ictx |
771 | && conf != THISNODE |
754 | && conf != THISNODE |
772 | && connectmode != conf_node::C_NEVER |
755 | && connectmode != conf_node::C_NEVER |
773 | && connectmode != conf_node::C_DISABLED |
756 | && connectmode != conf_node::C_DISABLED |
774 | && NOW > w.at) |
757 | && !w.is_active ()) |
775 | { |
758 | { |
776 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
759 | ev::tstamp retry_int = ev::tstamp (retry_cnt & 3 |
777 | |
760 | ? (retry_cnt & 3) + 1 |
778 | if (retry_int < conf->max_retry) |
761 | : 1 << (retry_cnt >> 2)); |
779 | retry_cnt++; |
|
|
780 | else |
|
|
781 | retry_int = conf->max_retry; |
|
|
782 | |
|
|
783 | w.start (NOW + retry_int); |
|
|
784 | |
762 | |
785 | reset_si (); |
763 | reset_si (); |
786 | |
764 | |
|
|
765 | bool slow = si.prot & PROT_SLOW; |
|
|
766 | |
787 | if (si.prot && !si.host) |
767 | if (si.prot && !si.host) |
|
|
768 | { |
|
|
769 | slog (L_TRACE, _("%s: connection request (indirect)"), conf->nodename); |
|
|
770 | /*TODO*/ /* start the timer so we don't recurse endlessly */ |
|
|
771 | w.start (1); |
788 | vpn->send_connect_request (conf->id); |
772 | vpn->send_connect_request (conf->id); |
|
|
773 | } |
789 | else |
774 | else |
790 | { |
775 | { |
|
|
776 | slog (L_TRACE, _("%s: connection request (direct)"), conf->nodename, !!ictx, !!octx); |
|
|
777 | |
791 | const sockinfo &dsi = forward_si (si); |
778 | const sockinfo &dsi = forward_si (si); |
|
|
779 | |
|
|
780 | slow = slow || (dsi.prot & PROT_SLOW); |
792 | |
781 | |
793 | if (dsi.valid () && auth_rate_limiter.can (dsi)) |
782 | if (dsi.valid () && auth_rate_limiter.can (dsi)) |
794 | { |
783 | { |
795 | if (retry_cnt < 4) |
784 | if (retry_cnt < 4) |
796 | send_auth_request (dsi, true); |
785 | send_auth_request (dsi, true); |
797 | else |
786 | else |
798 | send_ping (dsi, 0); |
787 | send_ping (dsi, 0); |
799 | } |
788 | } |
800 | } |
789 | } |
|
|
790 | |
|
|
791 | retry_int *= slow ? 8. : 0.7; |
|
|
792 | |
|
|
793 | if (retry_int < conf->max_retry) |
|
|
794 | retry_cnt++; |
|
|
795 | else |
|
|
796 | retry_int = conf->max_retry; |
|
|
797 | |
|
|
798 | w.start (retry_int); |
801 | } |
799 | } |
802 | } |
800 | } |
803 | |
801 | |
804 | void |
802 | void |
805 | connection::reset_connection () |
803 | connection::reset_connection () |
… | |
… | |
808 | { |
806 | { |
809 | slog (L_INFO, _("%s(%s): connection lost"), |
807 | slog (L_INFO, _("%s(%s): connection lost"), |
810 | conf->nodename, (const char *)si); |
808 | conf->nodename, (const char *)si); |
811 | |
809 | |
812 | if (::conf.script_node_down) |
810 | if (::conf.script_node_down) |
813 | run_script (run_script_cb (this, &connection::script_node_down), false); |
811 | { |
|
|
812 | run_script_cb cb; |
|
|
813 | cb.set<connection, &connection::script_node_down> (this); |
|
|
814 | if (!run_script (cb, false)) |
|
|
815 | slog (L_WARN, _("node-down command execution failed, continuing.")); |
|
|
816 | } |
814 | } |
817 | } |
815 | |
818 | |
816 | delete ictx; ictx = 0; |
819 | delete ictx; ictx = 0; |
817 | delete octx; octx = 0; |
820 | delete octx; octx = 0; |
|
|
821 | #if ENABLE_DNS |
|
|
822 | dnsv4_reset_connection (); |
|
|
823 | #endif |
818 | |
824 | |
819 | si.host = 0; |
825 | si.host = 0; |
820 | |
826 | |
821 | last_activity = 0; |
827 | last_activity = 0; |
822 | retry_cnt = 0; |
828 | retry_cnt = 0; |
… | |
… | |
834 | |
840 | |
835 | reset_connection (); |
841 | reset_connection (); |
836 | } |
842 | } |
837 | |
843 | |
838 | void |
844 | void |
839 | connection::rekey_cb (time_watcher &w) |
845 | connection::rekey_cb (ev::timer &w, int revents) |
840 | { |
846 | { |
841 | reset_connection (); |
847 | reset_connection (); |
842 | establish_connection (); |
848 | establish_connection (); |
843 | } |
849 | } |
844 | |
850 | |
… | |
… | |
866 | { |
872 | { |
867 | if (ictx && octx) |
873 | if (ictx && octx) |
868 | send_data_packet (pkt); |
874 | send_data_packet (pkt); |
869 | else |
875 | else |
870 | { |
876 | { |
871 | if (!broadcast)//DDDD |
877 | if (!broadcast) |
872 | data_queue.put (new tap_packet (*pkt)); |
878 | data_queue.put (new tap_packet (*pkt)); |
873 | |
879 | |
874 | establish_connection (); |
880 | establish_connection (); |
875 | } |
881 | } |
876 | } |
882 | } |
… | |
… | |
888 | } |
894 | } |
889 | |
895 | |
890 | void |
896 | void |
891 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
897 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
892 | { |
898 | { |
893 | last_activity = NOW; |
899 | last_activity = ev_now (); |
894 | |
900 | |
895 | slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
901 | slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
896 | conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
902 | conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
|
|
903 | |
|
|
904 | if (connectmode == conf_node::C_DISABLED) |
|
|
905 | return; |
897 | |
906 | |
898 | switch (pkt->typ ()) |
907 | switch (pkt->typ ()) |
899 | { |
908 | { |
900 | case vpn_packet::PT_PING: |
909 | case vpn_packet::PT_PING: |
901 | // we send pings instead of auth packets after some retries, |
910 | // we send pings instead of auth packets after some retries, |
… | |
… | |
961 | delete octx; |
970 | delete octx; |
962 | |
971 | |
963 | octx = new crypto_ctx (k, 1); |
972 | octx = new crypto_ctx (k, 1); |
964 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
973 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
965 | |
974 | |
966 | // compatibility code, remove when no longer required |
|
|
967 | if (p->flags & 1) p->features |= FEATURE_COMPRESSION; |
|
|
968 | |
|
|
969 | conf->protocols = p->protocols; |
975 | conf->protocols = p->protocols; |
970 | features = p->features & config_packet::get_features (); |
976 | features = p->features & config_packet::get_features (); |
971 | |
977 | |
972 | send_auth_response (rsi, p->id, k); |
978 | send_auth_response (rsi, p->id, k); |
973 | |
979 | |
… | |
… | |
1039 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
1045 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
1040 | conf->nodename, (const char *)rsi, |
1046 | conf->nodename, (const char *)rsi, |
1041 | p->prot_major, p->prot_minor); |
1047 | p->prot_major, p->prot_minor); |
1042 | |
1048 | |
1043 | if (::conf.script_node_up) |
1049 | if (::conf.script_node_up) |
1044 | run_script (run_script_cb (this, &connection::script_node_up), false); |
1050 | { |
|
|
1051 | run_script_cb cb; |
|
|
1052 | cb.set<connection, &connection::script_node_up> (this); |
|
|
1053 | if (!run_script (cb, false)) |
|
|
1054 | slog (L_WARN, _("node-up command execution failed, continuing.")); |
|
|
1055 | } |
1045 | |
1056 | |
1046 | break; |
1057 | break; |
1047 | } |
1058 | } |
1048 | else |
1059 | else |
1049 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
1060 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
… | |
… | |
1083 | { |
1094 | { |
1084 | vpn->tap->send (d); |
1095 | vpn->tap->send (d); |
1085 | |
1096 | |
1086 | if (si != rsi) |
1097 | if (si != rsi) |
1087 | { |
1098 | { |
1088 | // fast re-sync on connection changes, useful especially for tcp/ip |
1099 | // fast re-sync on source address changes, useful especially for tcp/ip |
1089 | si = rsi; |
1100 | si = rsi; |
1090 | |
1101 | |
1091 | slog (L_INFO, _("%s(%s): socket address changed to %s"), |
1102 | slog (L_INFO, _("%s(%s): socket address changed to %s"), |
1092 | conf->nodename, (const char *)si, (const char *)rsi); |
1103 | conf->nodename, (const char *)si, (const char *)rsi); |
1093 | } |
1104 | } |
… | |
… | |
1104 | case vpn_packet::PT_CONNECT_REQ: |
1115 | case vpn_packet::PT_CONNECT_REQ: |
1105 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1116 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1106 | { |
1117 | { |
1107 | connect_req_packet *p = (connect_req_packet *) pkt; |
1118 | connect_req_packet *p = (connect_req_packet *) pkt; |
1108 | |
1119 | |
1109 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1120 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1110 | connection *c = vpn->conns[p->id - 1]; |
|
|
1111 | conf->protocols = p->protocols; |
|
|
1112 | |
|
|
1113 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n", |
|
|
1114 | conf->id, p->id, c->ictx && c->octx); |
|
|
1115 | |
|
|
1116 | if (c->ictx && c->octx) |
|
|
1117 | { |
1121 | { |
|
|
1122 | connection *c = vpn->conns[p->id - 1]; |
|
|
1123 | conf->protocols = p->protocols; |
|
|
1124 | |
|
|
1125 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]", |
|
|
1126 | conf->id, p->id, c->ictx && c->octx); |
|
|
1127 | |
|
|
1128 | if (c->ictx && c->octx) |
|
|
1129 | { |
1118 | // send connect_info packets to both sides, in case one is |
1130 | // send connect_info packets to both sides, in case one is |
1119 | // behind a nat firewall (or both ;) |
1131 | // behind a nat firewall (or both ;) |
1120 | c->send_connect_info (conf->id, si, conf->protocols); |
1132 | c->send_connect_info (conf->id, si, conf->protocols); |
1121 | send_connect_info (c->conf->id, c->si, c->conf->protocols); |
1133 | send_connect_info (c->conf->id, c->si, c->conf->protocols); |
|
|
1134 | } |
|
|
1135 | else |
|
|
1136 | c->establish_connection (); |
1122 | } |
1137 | } |
1123 | else |
1138 | else |
1124 | c->establish_connection (); |
1139 | slog (L_WARN, |
|
|
1140 | _("received authenticated connection request from unknown node #%d, config file mismatch?"), |
|
|
1141 | p->id); |
1125 | } |
1142 | } |
1126 | |
1143 | |
1127 | break; |
1144 | break; |
1128 | |
1145 | |
1129 | case vpn_packet::PT_CONNECT_INFO: |
1146 | case vpn_packet::PT_CONNECT_INFO: |
1130 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1147 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1131 | { |
1148 | { |
1132 | connect_info_packet *p = (connect_info_packet *)pkt; |
1149 | connect_info_packet *p = (connect_info_packet *)pkt; |
1133 | |
1150 | |
1134 | if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything |
1151 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1135 | { |
1152 | { |
1136 | connection *c = vpn->conns[p->id - 1]; |
1153 | connection *c = vpn->conns[p->id - 1]; |
1137 | |
1154 | |
1138 | c->conf->protocols = p->protocols; |
1155 | c->conf->protocols = p->protocols; |
1139 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1156 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
… | |
… | |
1145 | const sockinfo &dsi = forward_si (p->si); |
1162 | const sockinfo &dsi = forward_si (p->si); |
1146 | |
1163 | |
1147 | if (dsi.valid ()) |
1164 | if (dsi.valid ()) |
1148 | c->send_auth_request (dsi, true); |
1165 | c->send_auth_request (dsi, true); |
1149 | } |
1166 | } |
|
|
1167 | else |
|
|
1168 | slog (L_WARN, |
|
|
1169 | _("received authenticated connection request from unknown node #%d, config file mismatch?"), |
|
|
1170 | p->id); |
1150 | } |
1171 | } |
1151 | |
1172 | |
1152 | break; |
1173 | break; |
1153 | |
1174 | |
1154 | default: |
1175 | default: |
1155 | send_reset (rsi); |
1176 | send_reset (rsi); |
1156 | break; |
1177 | break; |
1157 | } |
1178 | } |
1158 | } |
1179 | } |
1159 | |
1180 | |
1160 | void connection::keepalive_cb (time_watcher &w) |
1181 | void connection::keepalive_cb (ev::timer &w, int revents) |
1161 | { |
1182 | { |
1162 | if (NOW >= last_activity + ::conf.keepalive + 30) |
1183 | if (ev_now () >= last_activity + ::conf.keepalive + 30) |
1163 | { |
1184 | { |
1164 | reset_connection (); |
1185 | reset_connection (); |
1165 | establish_connection (); |
1186 | establish_connection (); |
1166 | } |
1187 | } |
1167 | else if (NOW < last_activity + ::conf.keepalive) |
1188 | else if (ev_now () < last_activity + ::conf.keepalive) |
1168 | w.start (last_activity + ::conf.keepalive); |
1189 | w.start (last_activity + ::conf.keepalive - ev::now ()); |
1169 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1190 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1170 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1191 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1171 | { |
1192 | { |
1172 | send_ping (si); |
1193 | send_ping (si); |
1173 | w.start (NOW + 5); |
1194 | w.start (5); |
1174 | } |
1195 | } |
1175 | else if (NOW < last_activity + ::conf.keepalive + 10) |
1196 | else if (ev_now () < last_activity + ::conf.keepalive + 10) |
1176 | // hold ondemand connections implicitly a few seconds longer |
1197 | // hold ondemand connections implicitly a few seconds longer |
1177 | // should delete octx, though, or something like that ;) |
1198 | // should delete octx, though, or something like that ;) |
1178 | w.start (last_activity + ::conf.keepalive + 10); |
1199 | w.start (last_activity + ::conf.keepalive + 10 - ev::now ()); |
1179 | else |
1200 | else |
1180 | reset_connection (); |
1201 | reset_connection (); |
1181 | } |
1202 | } |
1182 | |
1203 | |
1183 | void connection::send_connect_request (int id) |
1204 | void connection::send_connect_request (int id) |
… | |
… | |
1189 | send_vpn_packet (p, si); |
1210 | send_vpn_packet (p, si); |
1190 | |
1211 | |
1191 | delete p; |
1212 | delete p; |
1192 | } |
1213 | } |
1193 | |
1214 | |
|
|
1215 | void connection::script_init_env (const char *ext) |
|
|
1216 | { |
|
|
1217 | char *env; |
|
|
1218 | asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env); |
|
|
1219 | asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env); |
|
|
1220 | asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext, |
|
|
1221 | 0xfe, 0xfd, 0x80, 0x00, conf->id >> 8, |
|
|
1222 | conf->id & 0xff); putenv (env); |
|
|
1223 | } |
|
|
1224 | |
1194 | void connection::script_node () |
1225 | void connection::script_init_connect_env () |
1195 | { |
1226 | { |
1196 | vpn->script_if_up (); |
1227 | vpn->script_init_env (); |
1197 | |
1228 | |
1198 | char *env; |
1229 | char *env; |
1199 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1230 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1200 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1231 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1201 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1232 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1202 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1233 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1203 | } |
1234 | } |
1204 | |
1235 | |
1205 | const char *connection::script_node_up () |
1236 | const char *connection::script_node_up () |
1206 | { |
1237 | { |
1207 | script_node (); |
1238 | script_init_connect_env (); |
1208 | |
1239 | |
1209 | putenv ("STATE=up"); |
1240 | putenv ((char *)"STATE=up"); |
1210 | |
1241 | |
|
|
1242 | char *filename; |
|
|
1243 | asprintf (&filename, |
|
|
1244 | "%s/%s", |
|
|
1245 | confbase, |
1211 | return ::conf.script_node_up ? ::conf.script_node_up : "node-up"; |
1246 | ::conf.script_node_up ? ::conf.script_node_up : "node-up"); |
|
|
1247 | |
|
|
1248 | return filename; |
1212 | } |
1249 | } |
1213 | |
1250 | |
1214 | const char *connection::script_node_down () |
1251 | const char *connection::script_node_down () |
1215 | { |
1252 | { |
1216 | script_node (); |
1253 | script_init_connect_env (); |
1217 | |
1254 | |
1218 | putenv ("STATE=down"); |
1255 | putenv ((char *)"STATE=down"); |
1219 | |
1256 | |
1220 | return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
1257 | char *filename; |
|
|
1258 | asprintf (&filename, |
|
|
1259 | "%s/%s", |
|
|
1260 | confbase, |
|
|
1261 | ::conf.script_node_down ? ::conf.script_node_down : "node-down"); |
|
|
1262 | |
|
|
1263 | return filename; |
1221 | } |
1264 | } |
1222 | |
1265 | |
1223 | connection::connection (struct vpn *vpn, conf_node *conf) |
1266 | connection::connection (struct vpn *vpn, conf_node *conf) |
1224 | : vpn(vpn), conf(conf) |
1267 | : vpn(vpn), conf(conf) |
1225 | , rekey (this, &connection::rekey_cb) |
|
|
1226 | , keepalive (this, &connection::keepalive_cb) |
|
|
1227 | , establish_connection (this, &connection::establish_connection_cb) |
|
|
1228 | #if ENABLE_DNS |
1268 | #if ENABLE_DNS |
1229 | , dnsv4_tw (this, &connection::dnsv4_cb) |
1269 | , dns (0) |
1230 | , dns_rcvdq (0), dns_snddq (0) |
|
|
1231 | , dns_rcvseq (0), dns_sndseq (0) |
|
|
1232 | #endif |
1270 | #endif |
1233 | { |
1271 | { |
|
|
1272 | rekey .set<connection, &connection::rekey_cb > (this); |
|
|
1273 | keepalive .set<connection, &connection::keepalive_cb > (this); |
|
|
1274 | establish_connection.set<connection, &connection::establish_connection_cb> (this); |
|
|
1275 | |
1234 | octx = ictx = 0; |
1276 | octx = ictx = 0; |
1235 | retry_cnt = 0; |
1277 | retry_cnt = 0; |
1236 | |
1278 | |
1237 | if (!conf->protocols) // make sure some protocol is enabled |
1279 | if (!conf->protocols) // make sure some protocol is enabled |
1238 | conf->protocols = PROT_UDPv4; |
1280 | conf->protocols = PROT_UDPv4; |