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Comparing gvpe/src/connection.C (file contents):
Revision 1.52 by pcg, Wed Mar 23 21:55:39 2005 UTC vs.
Revision 1.86 by pcg, Thu Jan 21 04:30:32 2010 UTC

1/* 1/*
2 connection.C -- manage a single connection 2 connection.C -- manage a single connection
3 Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> 3 Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
4 4
5 This file is part of GVPE. 5 This file is part of GVPE.
6 6
7 GVPE is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify it
8 it under the terms of the GNU General Public License as published by 8 under the terms of the GNU General Public License as published by the
9 the Free Software Foundation; either version 2 of the License, or 9 Free Software Foundation; either version 3 of the License, or (at your
10 (at your option) any later version. 10 option) any later version.
11 11
12 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, but
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15 GNU General Public License for more details. 15 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 along
18 along with gvpe; if not, write to the Free Software 18 with this program; if not, see <http://www.gnu.org/licenses/>.
19 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19
20 Additional permission under GNU GPL version 3 section 7
21
22 If you modify this Program, or any covered work, by linking or
23 combining it with the OpenSSL project's OpenSSL library (or a modified
24 version of that library), containing parts covered by the terms of the
25 OpenSSL or SSLeay licenses, the licensors of this Program grant you
26 additional permission to convey the resulting work. Corresponding
27 Source for a non-source form of such a combination shall include the
28 source code for the parts of OpenSSL used as well as that of the
29 covered work.
20*/ 30*/
21 31
22#include "config.h" 32#include "config.h"
23 33
24#include <cassert>
25
26#include <list> 34#include <list>
35#include <queue>
36#include <utility>
27 37
28#include <openssl/rand.h> 38#include <openssl/rand.h>
29#include <openssl/evp.h> 39#include <openssl/evp.h>
30#include <openssl/rsa.h> 40#include <openssl/rsa.h>
31#include <openssl/err.h> 41#include <openssl/err.h>
… …
40 50
41#if !HAVE_RAND_PSEUDO_BYTES 51#if !HAVE_RAND_PSEUDO_BYTES
42# define RAND_pseudo_bytes RAND_bytes 52# define RAND_pseudo_bytes RAND_bytes
43#endif 53#endif
44 54
45#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic 55#define MAGIC_OLD "vped\xbd\xc6\xdb\x82" // 8 bytes of magic (still used in the protocol)
56#define MAGIC "gvpe\xbd\xc6\xdb\x82" // 8 bytes of magic (understood but not generated)
46 57
47#define ULTRA_FAST 1 58#define ULTRA_FAST 1
48#define HLOG 15 59#define HLOG 15
49#include "lzf/lzf.h" 60#include "lzf/lzf.h"
50#include "lzf/lzf_c.c" 61#include "lzf/lzf_c.c"
51#include "lzf/lzf_d.c" 62#include "lzf/lzf_d.c"
63
64//////////////////////////////////////////////////////////////////////////////
65
66static std::queue< std::pair<run_script_cb *, const char *> > rs_queue;
67static ev::child rs_child_ev;
68
69void // c++ requires external linkage here, apparently :(
70rs_child_cb (ev::child &w, int revents)
71{
72 w.stop ();
73
74 if (rs_queue.empty ())
75 return;
76
77 pid_t pid = run_script (*rs_queue.front ().first, false);
78 if (pid)
79 {
80 w.set (pid);
81 w.start ();
82 }
83 else
84 slog (L_WARN, rs_queue.front ().second);
85
86 delete rs_queue.front ().first;
87 rs_queue.pop ();
88}
89
90// despite the fancy name, this is quite a hack
91static void
92run_script_queued (run_script_cb *cb, const char *warnmsg)
93{
94 rs_queue.push (std::make_pair (cb, warnmsg));
95
96 if (!rs_child_ev.is_active ())
97 {
98 rs_child_ev.set<rs_child_cb> ();
99 rs_child_ev ();
100 }
101}
102
103//////////////////////////////////////////////////////////////////////////////
52 104
53struct crypto_ctx 105struct crypto_ctx
54{ 106{
55 EVP_CIPHER_CTX cctx; 107 EVP_CIPHER_CTX cctx;
56 HMAC_CTX hctx; 108 HMAC_CTX hctx;
… …
84 require (EVP_DigestUpdate(&ctx, &id, sizeof id)); 136 require (EVP_DigestUpdate(&ctx, &id, sizeof id));
85 require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0)); 137 require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0));
86 EVP_MD_CTX_cleanup (&ctx); 138 EVP_MD_CTX_cleanup (&ctx);
87} 139}
88 140
89struct rsa_entry { 141struct rsa_entry
142{
90 tstamp expire; 143 tstamp expire;
91 rsaid id; 144 rsaid id;
92 rsachallenge chg; 145 rsachallenge chg;
93}; 146};
94 147
95struct rsa_cache : list<rsa_entry> 148struct rsa_cache : list<rsa_entry>
96{ 149{
97 void cleaner_cb (time_watcher &w); time_watcher cleaner; 150 inline void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;
98 151
99 bool find (const rsaid &id, rsachallenge &chg) 152 bool find (const rsaid &id, rsachallenge &chg)
100 { 153 {
101 for (iterator i = begin (); i != end (); ++i) 154 for (iterator i = begin (); i != end (); ++i)
102 { 155 {
103 if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW) 156 if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev_now ())
104 { 157 {
105 memcpy (&chg, &i->chg, sizeof chg); 158 memcpy (&chg, &i->chg, sizeof chg);
106 159
107 erase (i); 160 erase (i);
108 return true; 161 return true;
109 } 162 }
110 } 163 }
111 164
112 if (cleaner.at < NOW) 165 if (!cleaner.is_active ())
113 cleaner.start (NOW + RSA_TTL); 166 cleaner.again ();
114 167
115 return false; 168 return false;
116 } 169 }
117 170
118 void gen (rsaid &id, rsachallenge &chg) 171 void gen (rsaid &id, rsachallenge &chg)
… …
120 rsa_entry e; 173 rsa_entry e;
121 174
122 RAND_bytes ((unsigned char *)&id, sizeof id); 175 RAND_bytes ((unsigned char *)&id, sizeof id);
123 RAND_bytes ((unsigned char *)&chg, sizeof chg); 176 RAND_bytes ((unsigned char *)&chg, sizeof chg);
124 177
125 e.expire = NOW + RSA_TTL; 178 e.expire = ev_now () + RSA_TTL;
126 e.id = id; 179 e.id = id;
127 memcpy (&e.chg, &chg, sizeof chg); 180 memcpy (&e.chg, &chg, sizeof chg);
128 181
129 push_back (e); 182 push_back (e);
130 183
131 if (cleaner.at < NOW) 184 if (!cleaner.is_active ())
132 cleaner.start (NOW + RSA_TTL); 185 cleaner.again ();
133 } 186 }
134 187
135 rsa_cache () 188 rsa_cache ()
136 : cleaner (this, &rsa_cache::cleaner_cb)
137 { } 189 {
190 cleaner.set<rsa_cache, &rsa_cache::cleaner_cb> (this);
191 cleaner.set (RSA_TTL, RSA_TTL);
192 }
138 193
139} rsa_cache; 194} rsa_cache;
140 195
141void rsa_cache::cleaner_cb (time_watcher &w) 196void rsa_cache::cleaner_cb (ev::timer &w, int revents)
142{ 197{
143 if (!empty ()) 198 if (empty ())
199 w.stop ();
200 else
144 { 201 {
145 w.start (NOW + RSA_TTL);
146
147 for (iterator i = begin (); i != end (); ) 202 for (iterator i = begin (); i != end (); )
148 if (i->expire <= NOW) 203 if (i->expire <= ev_now ())
149 i = erase (i); 204 i = erase (i);
150 else 205 else
151 ++i; 206 ++i;
152 } 207 }
153} 208}
154 209
155////////////////////////////////////////////////////////////////////////////// 210//////////////////////////////////////////////////////////////////////////////
156 211
157void pkt_queue::put (net_packet *p) 212pkt_queue::pkt_queue (double max_ttl, int max_queue)
213: max_ttl (max_ttl), max_queue (max_queue)
158{ 214{
159 if (queue[i]) 215 queue = new pkt [max_queue];
160 {
161 delete queue[i];
162 j = (j + 1) % QUEUEDEPTH;
163 }
164 216
165 queue[i] = p;
166
167 i = (i + 1) % QUEUEDEPTH;
168}
169
170net_packet *pkt_queue::get ()
171{
172 net_packet *p = queue[j];
173
174 if (p)
175 {
176 queue[j] = 0;
177 j = (j + 1) % QUEUEDEPTH;
178 }
179
180 return p;
181}
182
183pkt_queue::pkt_queue ()
184{
185 memset (queue, 0, sizeof (queue));
186 i = 0; 217 i = 0;
187 j = 0; 218 j = 0;
219
220 expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
188} 221}
189 222
190pkt_queue::~pkt_queue () 223pkt_queue::~pkt_queue ()
191{ 224{
192 for (i = QUEUEDEPTH; --i > 0; ) 225 while (net_packet *p = get ())
226 delete p;
227
193 delete queue[i]; 228 delete [] queue;
194} 229}
195 230
231void pkt_queue::expire_cb (ev::timer &w, int revents)
232{
233 ev_tstamp expire = ev_now () - max_ttl;
234
235 for (;;)
236 {
237 if (empty ())
238 break;
239
240 double diff = queue[j].tstamp - expire;
241
242 if (diff >= 0.)
243 {
244 w.start (diff > 0.5 ? diff : 0.5);
245 break;
246 }
247
248 delete get ();
249 }
250}
251
252void pkt_queue::put (net_packet *p)
253{
254 ev_tstamp now = ev_now ();
255
256 // start expiry timer
257 if (empty ())
258 expire.start (max_ttl);
259
260 int ni = i + 1 == max_queue ? 0 : i + 1;
261
262 if (ni == j)
263 delete get ();
264
265 queue[i].pkt = p;
266 queue[i].tstamp = now;
267
268 i = ni;
269}
270
271net_packet *pkt_queue::get ()
272{
273 if (empty ())
274 return 0;
275
276 net_packet *p = queue[j].pkt;
277 queue[j].pkt = 0;
278
279 j = j + 1 == max_queue ? 0 : j + 1;
280
281 return p;
282}
283
196struct net_rateinfo { 284struct net_rateinfo
285{
197 u32 host; 286 u32 host;
198 double pcnt, diff; 287 double pcnt, diff;
199 tstamp last; 288 tstamp last;
200}; 289};
201 290
… …
220 iterator i; 309 iterator i;
221 310
222 for (i = begin (); i != end (); ) 311 for (i = begin (); i != end (); )
223 if (i->host == host) 312 if (i->host == host)
224 break; 313 break;
225 else if (i->last < NOW - NRL_EXPIRE) 314 else if (i->last < ev_now () - NRL_EXPIRE)
226 i = erase (i); 315 i = erase (i);
227 else 316 else
228 i++; 317 i++;
229 318
230 if (i == end ()) 319 if (i == end ())
… …
232 net_rateinfo ri; 321 net_rateinfo ri;
233 322
234 ri.host = host; 323 ri.host = host;
235 ri.pcnt = 1.; 324 ri.pcnt = 1.;
236 ri.diff = NRL_MAXDIF; 325 ri.diff = NRL_MAXDIF;
237 ri.last = NOW; 326 ri.last = ev_now ();
238 327
239 push_front (ri); 328 push_front (ri);
240 329
241 return true; 330 return true;
242 } 331 }
… …
244 { 333 {
245 net_rateinfo ri (*i); 334 net_rateinfo ri (*i);
246 erase (i); 335 erase (i);
247 336
248 ri.pcnt = ri.pcnt * NRL_ALPHA; 337 ri.pcnt = ri.pcnt * NRL_ALPHA;
249 ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last); 338 ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
250 339
251 ri.last = NOW; 340 ri.last = ev_now ();
252 341
253 double dif = ri.diff / ri.pcnt; 342 double dif = ri.diff / ri.pcnt;
254 343
255 bool send = dif > NRL_CUTOFF; 344 bool send = dif > NRL_CUTOFF;
256 345
… …
336 ptype type = PT_DATA_UNCOMPRESSED; 425 ptype type = PT_DATA_UNCOMPRESSED;
337 426
338#if ENABLE_COMPRESSION 427#if ENABLE_COMPRESSION
339 u8 cdata[MAX_MTU]; 428 u8 cdata[MAX_MTU];
340 429
341 if (conn->features & ENABLE_COMPRESSION) 430 if (conn->features & FEATURE_COMPRESSION)
342 { 431 {
343 u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); 432 u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7);
344 433
345 if (cl) 434 if (cl)
346 { 435 {
… …
465#if ENABLE_COMPRESSION 554#if ENABLE_COMPRESSION
466 f |= FEATURE_COMPRESSION; 555 f |= FEATURE_COMPRESSION;
467#endif 556#endif
468#if ENABLE_ROHC 557#if ENABLE_ROHC
469 f |= FEATURE_ROHC; 558 f |= FEATURE_ROHC;
559#endif
560#if ENABLE_BRIDGING
561 f |= FEATURE_BRIDGING;
470#endif 562#endif
471 return f; 563 return f;
472 } 564 }
473}; 565};
474 566
… …
522 rsaencrdata encr; 614 rsaencrdata encr;
523 615
524 auth_req_packet (int dst, bool initiate_, u8 protocols_) 616 auth_req_packet (int dst, bool initiate_, u8 protocols_)
525 { 617 {
526 config_packet::setup (PT_AUTH_REQ, dst); 618 config_packet::setup (PT_AUTH_REQ, dst);
527 strncpy (magic, MAGIC, 8); 619 strncpy (magic, MAGIC_OLD, 8);
528 initiate = !!initiate_; 620 initiate = !!initiate_;
529 protocols = protocols_; 621 protocols = protocols_;
530 622
531 len = sizeof (*this) - sizeof (net_packet); 623 len = sizeof (*this) - sizeof (net_packet);
532 } 624 }
… …
581///////////////////////////////////////////////////////////////////////////// 673/////////////////////////////////////////////////////////////////////////////
582 674
583void 675void
584connection::connection_established () 676connection::connection_established ()
585{ 677{
678 slog (L_NOISE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);
679
586 if (ictx && octx) 680 if (ictx && octx)
587 { 681 {
588 connectmode = conf->connectmode;
589
590 // make sure rekeying timeouts are slightly asymmetric 682 // make sure rekeying timeouts are slightly asymmetric
591 rekey.start (NOW + ::conf.rekey 683 ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
592 + (conf->id > THISNODE->id ? 10 : 0)); 684 rekey.start (rekey_interval, rekey_interval);
593 keepalive.start (NOW + ::conf.keepalive); 685 keepalive.start (::conf.keepalive);
594 686
595 // send queued packets 687 // send queued packets
596 if (ictx && octx) 688 if (ictx && octx)
597 { 689 {
598 while (tap_packet *p = (tap_packet *)data_queue.get ()) 690 while (tap_packet *p = (tap_packet *)data_queue.get ())
599 { 691 {
600 send_data_packet (p); 692 if (p->len) send_data_packet (p);
601 delete p; 693 delete p;
602 } 694 }
603 695
604 while (vpn_packet *p = (vpn_packet *)vpn_queue.get ()) 696 while (vpn_packet *p = (vpn_packet *)vpn_queue.get ())
605 { 697 {
606 send_vpn_packet (p, si, IPTOS_RELIABILITY); 698 if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
607 delete p; 699 delete p;
608 } 700 }
609 } 701 }
702
703 vpn->connection_established (this);
610 } 704 }
611 else 705 else
612 { 706 {
613 retry_cnt = 0; 707 retry_cnt = 0;
614 establish_connection.start (NOW + 5); 708 establish_connection.start (5);
615 keepalive.stop (); 709 keepalive.stop ();
616 rekey.stop (); 710 rekey.stop ();
617 } 711 }
618} 712}
619 713
620void 714void
621connection::reset_si () 715connection::reset_si ()
622{ 716{
717 if (vpn->can_direct (THISNODE, conf))
623 protocol = best_protocol (THISNODE->protocols & conf->protocols); 718 protocol = best_protocol (THISNODE->protocols & conf->connectable_protocols ());
624 719 else
625 // mask out protocols we cannot establish 720 {
626 if (!conf->udp_port) protocol &= ~PROT_UDPv4; 721 slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
627 if (!conf->tcp_port) protocol &= ~PROT_TCPv4; 722 protocol = 0;
628 if (!conf->dns_port) protocol &= ~PROT_DNSv4; 723 }
629 724
630 si.set (conf, protocol); 725 si.set (conf, protocol);
726
727 is_direct = si.valid ();
631} 728}
632 729
633// ensure sockinfo is valid, forward if necessary 730// ensure sockinfo is valid, forward if necessary
634const sockinfo & 731const sockinfo &
635connection::forward_si (const sockinfo &si) const 732connection::forward_si (const sockinfo &si) const
636{ 733{
637 if (!si.valid ()) 734 if (!si.valid ())
638 { 735 {
639 connection *r = vpn->find_router (); 736 connection *r = vpn->find_router_for (this);
640 737
641 if (r) 738 if (r)
642 { 739 {
643 slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"), 740 slog (L_DEBUG, _("%s: no common protocol, trying to route through %s."),
644 conf->nodename, r->conf->nodename, (const char *)r->si); 741 conf->nodename, r->conf->nodename);
645 return r->si; 742 return r->si;
646 } 743 }
647 else 744 else
648 slog (L_DEBUG, _("%s: node unreachable, no common protocol"), 745 slog (L_DEBUG, _("%s: node unreachable, no common protocol or no router available."),
649 conf->nodename); 746 conf->nodename);
650 } 747 }
651 748
652 return si; 749 return si;
653} 750}
… …
663connection::send_ping (const sockinfo &si, u8 pong) 760connection::send_ping (const sockinfo &si, u8 pong)
664{ 761{
665 ping_packet *pkt = new ping_packet; 762 ping_packet *pkt = new ping_packet;
666 763
667 pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING); 764 pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING);
765
766 slog (L_TRACE, "%s << %s [%s]", conf->nodename, pong ? "PT_PONG" : "PT_PING", (const char *)si);
767
668 send_vpn_packet (pkt, si, IPTOS_LOWDELAY); 768 send_vpn_packet (pkt, si, IPTOS_LOWDELAY);
669 769
670 delete pkt; 770 delete pkt;
671} 771}
672 772
… …
691 791
692 rsachallenge chg; 792 rsachallenge chg;
693 rsa_cache.gen (pkt->id, chg); 793 rsa_cache.gen (pkt->id, chg);
694 rsa_encrypt (conf->rsa_key, chg, pkt->encr); 794 rsa_encrypt (conf->rsa_key, chg, pkt->encr);
695 795
696 slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); 796 slog (L_TRACE, "%s << PT_AUTH_REQ [%s]", conf->nodename, (const char *)si);
697 797
698 send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly 798 send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly
699 799
700 delete pkt; 800 delete pkt;
701} 801}
… …
709 809
710 rsa_hash (id, chg, pkt->response); 810 rsa_hash (id, chg, pkt->response);
711 811
712 pkt->hmac_set (octx); 812 pkt->hmac_set (octx);
713 813
714 slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si); 814 slog (L_TRACE, "%s << PT_AUTH_RES [%s]", conf->nodename, (const char *)si);
715 815
716 send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly 816 send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly
717 817
718 delete pkt; 818 delete pkt;
719} 819}
720 820
721void 821void
722connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) 822connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
723{ 823{
724 slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n", 824 slog (L_TRACE, "%s << PT_CONNECT_INFO(%s,%s)", conf->nodename,
725 conf->id, rid, (const char *)rsi); 825 vpn->conns[rid - 1]->conf->nodename, (const char *)rsi);
726 826
727 connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); 827 connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
728 828
729 r->hmac_set (octx); 829 r->hmac_set (octx);
730 send_vpn_packet (r, si); 830 send_vpn_packet (r, si);
731 831
732 delete r; 832 delete r;
733} 833}
734 834
735void 835inline void
736connection::establish_connection_cb (time_watcher &w) 836connection::establish_connection_cb (ev::timer &w, int revents)
737{ 837{
738 if (!ictx 838 if (!ictx
739 && conf != THISNODE 839 && conf != THISNODE
740 && connectmode != conf_node::C_NEVER 840 && connectmode != conf_node::C_NEVER
741 && connectmode != conf_node::C_DISABLED 841 && connectmode != conf_node::C_DISABLED
742 && NOW > w.at) 842 && !w.is_active ())
743 { 843 {
744 w.at = TSTAMP_MAX; // first disable this watcher in case of recursion 844 // a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
845 // and stop trying. should probably be handled by a per-connection expire handler.
846 if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
847 {
848 reset_connection ();
849 return;
850 }
745 851
746 double retry_int = double (retry_cnt & 3 852 last_establish_attempt = ev_now ();
853
854 ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
747 ? (retry_cnt & 3) + 1 855 ? (retry_cnt & 3) + 1
748 : 1 << (retry_cnt >> 2)); 856 : 1 << (retry_cnt >> 2));
749 857
750 reset_si (); 858 reset_si ();
751 859
752 bool slow = si.prot & PROT_SLOW; 860 bool slow = si.prot & PROT_SLOW;
753 861
754 if (si.prot && !si.host) 862 if (si.prot && !si.host && vpn->can_direct (THISNODE, conf))
863 {
864 /*TODO*/ /* start the timer so we don't recurse endlessly */
865 w.start (1);
755 vpn->send_connect_request (conf->id); 866 vpn->send_connect_request (this);
867 }
756 else 868 else
757 { 869 {
870 if (si.valid ())
871 slog (L_DEBUG, _("%s: sending direct connection request to %s."),
872 conf->nodename, (const char *)si);
873
758 const sockinfo &dsi = forward_si (si); 874 const sockinfo &dsi = forward_si (si);
759 875
760 slow = slow || (dsi.prot & PROT_SLOW); 876 slow = slow || (dsi.prot & PROT_SLOW);
761 877
762 if (dsi.valid () && auth_rate_limiter.can (dsi)) 878 if (dsi.valid () && auth_rate_limiter.can (dsi))
… …
766 else 882 else
767 send_ping (dsi, 0); 883 send_ping (dsi, 0);
768 } 884 }
769 } 885 }
770 886
771 retry_int *= slow ? 8. : 0.7; 887 retry_int *= slow ? 8. : 0.9;
772 888
773 if (retry_int < conf->max_retry) 889 if (retry_int < conf->max_retry)
774 retry_cnt++; 890 retry_cnt++;
775 else 891 else
776 retry_int = conf->max_retry; 892 retry_int = conf->max_retry;
777 893
778 w.start (NOW + retry_int); 894 w.start (retry_int);
779 } 895 }
780} 896}
781 897
782void 898void
783connection::reset_connection () 899connection::reset_connection ()
… …
786 { 902 {
787 slog (L_INFO, _("%s(%s): connection lost"), 903 slog (L_INFO, _("%s(%s): connection lost"),
788 conf->nodename, (const char *)si); 904 conf->nodename, (const char *)si);
789 905
790 if (::conf.script_node_down) 906 if (::conf.script_node_down)
791 if (!run_script (run_script_cb (this, &connection::script_node_down), false)) 907 {
908 run_script_cb *cb = new run_script_cb;
909 cb->set<connection, &connection::script_node_down> (this);
792 slog (L_WARN, _("node-down command execution failed, continuing.")); 910 run_script_queued (cb, _("node-down command execution failed, continuing."));
911 }
793 } 912 }
794 913
795 delete ictx; ictx = 0; 914 delete ictx; ictx = 0;
796 delete octx; octx = 0; 915 delete octx; octx = 0;
797#if ENABLE_DNS 916#if ENABLE_DNS
798 dnsv4_reset_connection (); 917 dnsv4_reset_connection ();
799#endif 918#endif
800 919
801 si.host = 0; 920 si.host = 0;
802 921
803 last_activity = 0; 922 last_activity = 0.;
923 //last_si_change = 0.;
804 retry_cnt = 0; 924 retry_cnt = 0;
805 925
806 rekey.stop (); 926 rekey.stop ();
807 keepalive.stop (); 927 keepalive.stop ();
808 establish_connection.stop (); 928 establish_connection.stop ();
… …
815 send_reset (si); 935 send_reset (si);
816 936
817 reset_connection (); 937 reset_connection ();
818} 938}
819 939
820void 940// poor-man's rekeying
821connection::rekey_cb (time_watcher &w) 941inline void
942connection::rekey_cb (ev::timer &w, int revents)
822{ 943{
823 reset_connection (); 944 reset_connection ();
824 establish_connection (); 945 establish_connection ();
825} 946}
826 947
… …
842 if (oseqno > MAX_SEQNO) 963 if (oseqno > MAX_SEQNO)
843 rekey (); 964 rekey ();
844} 965}
845 966
846void 967void
968connection::post_inject_queue ()
969{
970 // force a connection every now and when when packets are sent (max 1/s)
971 if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
972 establish_connection.stop ();
973
974 establish_connection ();
975}
976
977void
847connection::inject_data_packet (tap_packet *pkt, bool broadcast/*TODO DDD*/) 978connection::inject_data_packet (tap_packet *pkt)
848{ 979{
849 if (ictx && octx) 980 if (ictx && octx)
850 send_data_packet (pkt); 981 send_data_packet (pkt);
851 else 982 else
852 { 983 {
853 if (!broadcast)//DDDD
854 data_queue.put (new tap_packet (*pkt)); 984 data_queue.put (new tap_packet (*pkt));
855 985 post_inject_queue ();
856 establish_connection ();
857 } 986 }
858} 987}
859 988
860void connection::inject_vpn_packet (vpn_packet *pkt, int tos) 989void connection::inject_vpn_packet (vpn_packet *pkt, int tos)
861{ 990{
862 if (ictx && octx) 991 if (ictx && octx)
863 send_vpn_packet (pkt, si, tos); 992 send_vpn_packet (pkt, si, tos);
864 else 993 else
865 { 994 {
866 vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt)); 995 vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt));
867 996 post_inject_queue ();
868 establish_connection ();
869 } 997 }
870} 998}
871 999
872void 1000void
873connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) 1001connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
874{ 1002{
875 last_activity = NOW; 1003 last_activity = ev_now ();
876 1004
877 slog (L_NOISE, "<<%d received packet type %d from %d to %d", 1005 slog (L_NOISE, "%s >> received packet type %d from %d to %d.",
878 conf->id, pkt->typ (), pkt->src (), pkt->dst ()); 1006 conf->nodename, pkt->typ (), pkt->src (), pkt->dst ());
1007
1008 if (connectmode == conf_node::C_DISABLED)
1009 return;
879 1010
880 switch (pkt->typ ()) 1011 switch (pkt->typ ())
881 { 1012 {
882 case vpn_packet::PT_PING: 1013 case vpn_packet::PT_PING:
1014 slog (L_TRACE, "%s >> PT_PING", conf->nodename);
1015
883 // we send pings instead of auth packets after some retries, 1016 // we send pings instead of auth packets after some retries,
884 // so reset the retry counter and establish a connection 1017 // so reset the retry counter and establish a connection
885 // when we receive a ping. 1018 // when we receive a ping.
886 if (!ictx) 1019 if (!ictx)
887 { 1020 {
888 if (auth_rate_limiter.can (rsi)) 1021 if (auth_rate_limiter.can (rsi))
889 send_auth_request (rsi, true); 1022 send_auth_request (rsi, true);
890 } 1023 }
891 else 1024 else
1025 // we would love to change thre socket address here, but ping's aren't
1026 // authenticated, so we best ignore it.
892 send_ping (rsi, 1); // pong 1027 send_ping (rsi, 1); // pong
893 1028
894 break; 1029 break;
895 1030
896 case vpn_packet::PT_PONG: 1031 case vpn_packet::PT_PONG:
1032 slog (L_TRACE, "%s >> PT_PONG", conf->nodename);
897 break; 1033 break;
898 1034
899 case vpn_packet::PT_RESET: 1035 case vpn_packet::PT_RESET:
900 { 1036 {
901 reset_connection (); 1037 reset_connection ();
902 1038
903 config_packet *p = (config_packet *) pkt; 1039 config_packet *p = (config_packet *) pkt;
904 1040
905 if (!p->chk_config ()) 1041 if (!p->chk_config ())
906 { 1042 {
907 slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"), 1043 slog (L_WARN, _("%s(%s): protocol mismatch, disabling node."),
908 conf->nodename, (const char *)rsi); 1044 conf->nodename, (const char *)rsi);
909 connectmode = conf_node::C_DISABLED; 1045 connectmode = conf_node::C_DISABLED;
910 } 1046 }
911 else if (connectmode == conf_node::C_ALWAYS) 1047 else if (connectmode == conf_node::C_ALWAYS)
912 establish_connection (); 1048 establish_connection ();
… …
916 case vpn_packet::PT_AUTH_REQ: 1052 case vpn_packet::PT_AUTH_REQ:
917 if (auth_rate_limiter.can (rsi)) 1053 if (auth_rate_limiter.can (rsi))
918 { 1054 {
919 auth_req_packet *p = (auth_req_packet *) pkt; 1055 auth_req_packet *p = (auth_req_packet *) pkt;
920 1056
921 slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate); 1057 slog (L_TRACE, "%s >> PT_AUTH_REQ(%s)", conf->nodename, p->initiate ? "initiate" : "reply");
922 1058
923 if (p->chk_config () && !strncmp (p->magic, MAGIC, 8)) 1059 if (p->chk_config ()
1060 && (!strncmp (p->magic, MAGIC_OLD, 8) || !strncmp (p->magic, MAGIC, 8)))
924 { 1061 {
925 if (p->prot_minor != PROTOCOL_MINOR) 1062 if (p->prot_minor != PROTOCOL_MINOR)
926 slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), 1063 slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
927 conf->nodename, (const char *)rsi, 1064 conf->nodename, (const char *)rsi,
928 PROTOCOL_MINOR, conf->nodename, p->prot_minor); 1065 PROTOCOL_MINOR, conf->nodename, p->prot_minor);
… …
954 1091
955 break; 1092 break;
956 } 1093 }
957 } 1094 }
958 else 1095 else
959 slog (L_WARN, _("%s(%s): protocol mismatch"), 1096 slog (L_WARN, _("%s(%s): protocol mismatch."),
960 conf->nodename, (const char *)rsi); 1097 conf->nodename, (const char *)rsi);
961 1098
962 send_reset (rsi); 1099 send_reset (rsi);
963 } 1100 }
964 1101
965 break; 1102 break;
966 1103
967 case vpn_packet::PT_AUTH_RES: 1104 case vpn_packet::PT_AUTH_RES:
968 { 1105 {
969 auth_res_packet *p = (auth_res_packet *) pkt; 1106 auth_res_packet *p = (auth_res_packet *)pkt;
970 1107
971 slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id); 1108 slog (L_TRACE, "%s >> PT_AUTH_RES", conf->nodename);
972 1109
973 if (p->chk_config ()) 1110 if (p->chk_config ())
974 { 1111 {
975 if (p->prot_minor != PROTOCOL_MINOR) 1112 if (p->prot_minor != PROTOCOL_MINOR)
976 slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), 1113 slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
… …
979 1116
980 rsachallenge chg; 1117 rsachallenge chg;
981 1118
982 if (!rsa_cache.find (p->id, chg)) 1119 if (!rsa_cache.find (p->id, chg))
983 { 1120 {
984 slog (L_ERR, _("%s(%s): unrequested auth response ignored"), 1121 slog (L_ERR, _("%s(%s): unrequested auth response, ignoring."),
985 conf->nodename, (const char *)rsi); 1122 conf->nodename, (const char *)rsi);
986 break; 1123 break;
987 } 1124 }
988 else 1125 else
989 { 1126 {
990 crypto_ctx *cctx = new crypto_ctx (chg, 0); 1127 crypto_ctx *cctx = new crypto_ctx (chg, 0);
991 1128
992 if (!p->hmac_chk (cctx)) 1129 if (!p->hmac_chk (cctx))
993 { 1130 {
994 slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" 1131 slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n"
995 "could be an attack, or just corruption or a synchronization error"), 1132 "could be an attack, or just corruption or a synchronization error."),
996 conf->nodename, (const char *)rsi); 1133 conf->nodename, (const char *)rsi);
997 break; 1134 break;
998 } 1135 }
999 else 1136 else
1000 { 1137 {
… …
1011 iseqno.reset (ntohl (*(u32 *)&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid 1148 iseqno.reset (ntohl (*(u32 *)&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid
1012 1149
1013 si = rsi; 1150 si = rsi;
1014 protocol = rsi.prot; 1151 protocol = rsi.prot;
1015 1152
1153 slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
1154 conf->nodename, (const char *)rsi,
1155 is_direct ? "direct" : "forwarded",
1156 p->prot_major, p->prot_minor);
1157
1016 connection_established (); 1158 connection_established ();
1017 1159
1018 slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1019 conf->nodename, (const char *)rsi,
1020 p->prot_major, p->prot_minor);
1021
1022 if (::conf.script_node_up) 1160 if (::conf.script_node_up)
1023 if (!run_script (run_script_cb (this, &connection::script_node_up), false)) 1161 {
1162 run_script_cb *cb = new run_script_cb;
1163 cb->set<connection, &connection::script_node_up> (this);
1024 slog (L_WARN, _("node-up command execution failed, continuing.")); 1164 run_script_queued (cb, _("node-up command execution failed, continuing."));
1165 }
1025 1166
1026 break; 1167 break;
1027 } 1168 }
1028 else 1169 else
1029 slog (L_ERR, _("%s(%s): sent and received challenge do not match"), 1170 slog (L_ERR, _("%s(%s): sent and received challenge do not match."),
1030 conf->nodename, (const char *)rsi); 1171 conf->nodename, (const char *)rsi);
1031 } 1172 }
1032 1173
1033 delete cctx; 1174 delete cctx;
1034 } 1175 }
… …
1050 { 1191 {
1051 vpndata_packet *p = (vpndata_packet *)pkt; 1192 vpndata_packet *p = (vpndata_packet *)pkt;
1052 1193
1053 if (!p->hmac_chk (ictx)) 1194 if (!p->hmac_chk (ictx))
1054 slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" 1195 slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
1055 "could be an attack, or just corruption or a synchronization error"), 1196 "could be an attack, or just corruption or a synchronization error."),
1056 conf->nodename, (const char *)rsi); 1197 conf->nodename, (const char *)rsi);
1057 else 1198 else
1058 { 1199 {
1059 u32 seqno; 1200 u32 seqno;
1060 tap_packet *d = p->unpack (this, seqno); 1201 tap_packet *d = p->unpack (this, seqno);
1202 int seqclass = iseqno.seqno_classify (seqno);
1061 1203
1062 if (iseqno.recv_ok (seqno)) 1204 if (seqclass == 0) // ok
1063 { 1205 {
1064 vpn->tap->send (d); 1206 vpn->tap->send (d);
1065 1207
1066 if (si != rsi) 1208 if (si != rsi)
1067 { 1209 {
1068 // fast re-sync on connection changes, useful especially for tcp/ip 1210 // fast re-sync on source address changes, useful especially for tcp/ip
1211 //if (last_si_change < ev_now () + 5.)
1069 si = rsi; 1212 // {
1070
1071 slog (L_INFO, _("%s(%s): socket address changed to %s"), 1213 slog (L_INFO, _("%s(%s): changing socket address to %s."),
1072 conf->nodename, (const char *)si, (const char *)rsi); 1214 conf->nodename, (const char *)si, (const char *)rsi);
1215
1216 si = rsi;
1217
1218 if (::conf.script_node_change)
1219 {
1220 run_script_cb *cb = new run_script_cb;
1221 cb->set<connection, &connection::script_node_change> (this);
1222 run_script_queued (cb, _("node-change command execution failed, continuing."));
1223 }
1224
1225 // }
1226 //else
1227 // slog (L_INFO, _("%s(%s): accepted packet from %s, not (yet) redirecting traffic."),
1228 // conf->nodename, (const char *)si, (const char *)rsi);
1073 } 1229 }
1230 }
1231 else if (seqclass == 1) // far history
1232 slog (L_ERR, _("received very old packet (received %08lx, expected %08lx). "
1233 "possible replay attack, or just packet duplication/delay, ignoring."), seqno, iseqno.seq + 1);
1234 else if (seqclass == 2) // in-window duplicate, happens often on wireless
1235 slog (L_DEBUG, _("received recent duplicated packet (received %08lx, expected %08lx). "
1236 "possible replay attack, or just packet duplication, ignoring."), seqno, iseqno.seq + 1);
1237 else if (seqclass == 3) // reset
1238 {
1239 slog (L_ERR, _("received out-of-sync (far future) packet (received %08lx, expected %08lx). "
1240 "probably just massive packet loss, sending reset."), seqno, iseqno.seq + 1);
1241 send_reset (rsi);
1074 } 1242 }
1075 1243
1076 delete d; 1244 delete d;
1077 break; 1245 break;
1078 } 1246 }
… …
1082 break; 1250 break;
1083 1251
1084 case vpn_packet::PT_CONNECT_REQ: 1252 case vpn_packet::PT_CONNECT_REQ:
1085 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) 1253 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1086 { 1254 {
1087 connect_req_packet *p = (connect_req_packet *) pkt; 1255 connect_req_packet *p = (connect_req_packet *)pkt;
1088 1256
1089 assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything 1257 if (p->id > 0 && p->id <= vpn->conns.size ())
1090 connection *c = vpn->conns[p->id - 1];
1091 conf->protocols = p->protocols;
1092
1093 slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n",
1094 conf->id, p->id, c->ictx && c->octx);
1095
1096 if (c->ictx && c->octx)
1097 { 1258 {
1259 connection *c = vpn->conns[p->id - 1];
1260 conf->protocols = p->protocols;
1261
1262 slog (L_TRACE, "%s >> PT_CONNECT_REQ(%s) [%d]",
1263 conf->nodename, vpn->conns[p->id - 1]->conf->nodename, c->ictx && c->octx);
1264
1265 if (c->ictx && c->octx)
1266 {
1098 // send connect_info packets to both sides, in case one is 1267 // send connect_info packets to both sides, in case one is
1099 // behind a nat firewall (or both ;) 1268 // behind a nat firewall (or both ;)
1100 c->send_connect_info (conf->id, si, conf->protocols); 1269 c->send_connect_info (conf->id, si, conf->protocols);
1101 send_connect_info (c->conf->id, c->si, c->conf->protocols); 1270 send_connect_info (c->conf->id, c->si, c->conf->protocols);
1271 }
1272 else
1273 c->establish_connection ();
1102 } 1274 }
1103 else 1275 else
1104 c->establish_connection (); 1276 slog (L_WARN,
1277 _("received authenticated connection request from unknown node #%d, config file mismatch?"),
1278 p->id);
1105 } 1279 }
1106 1280
1107 break; 1281 break;
1108 1282
1109 case vpn_packet::PT_CONNECT_INFO: 1283 case vpn_packet::PT_CONNECT_INFO:
1110 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) 1284 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1111 { 1285 {
1112 connect_info_packet *p = (connect_info_packet *)pkt; 1286 connect_info_packet *p = (connect_info_packet *)pkt;
1113 1287
1114 if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything 1288 if (p->id > 0 && p->id <= vpn->conns.size ())
1115 { 1289 {
1116 connection *c = vpn->conns[p->id - 1]; 1290 connection *c = vpn->conns[p->id - 1];
1117 1291
1118 c->conf->protocols = p->protocols; 1292 c->conf->protocols = p->protocols;
1119 protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); 1293 protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1120 p->si.upgrade_protocol (protocol, c->conf); 1294 p->si.upgrade_protocol (protocol, c->conf);
1121 1295
1122 slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", 1296 slog (L_TRACE, "%s >> PT_CONNECT_INFO(%s,%s) [%d]",
1297 conf->nodename, vpn->conns[p->id - 1]->conf->nodename,
1123 conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); 1298 (const char *)p->si, !c->ictx && !c->octx);
1124 1299
1125 const sockinfo &dsi = forward_si (p->si); 1300 const sockinfo &dsi = forward_si (p->si);
1126 1301
1127 if (dsi.valid ()) 1302 if (dsi.valid ())
1128 c->send_auth_request (dsi, true); 1303 c->send_auth_request (dsi, true);
1129 } 1304 }
1305 else
1306 slog (L_WARN,
1307 _("received authenticated connection request from unknown node #%d, config file mismatch?"),
1308 p->id);
1130 } 1309 }
1131 1310
1132 break; 1311 break;
1133 1312
1134 default: 1313 default:
1135 send_reset (rsi); 1314 send_reset (rsi);
1136 break; 1315 break;
1137 } 1316 }
1138} 1317}
1139 1318
1140void connection::keepalive_cb (time_watcher &w) 1319inline void
1320connection::keepalive_cb (ev::timer &w, int revents)
1141{ 1321{
1142 if (NOW >= last_activity + ::conf.keepalive + 30) 1322 if (ev_now () >= last_activity + ::conf.keepalive + 15)
1143 { 1323 {
1144 reset_connection (); 1324 reset_connection ();
1145 establish_connection (); 1325 establish_connection ();
1146 } 1326 }
1147 else if (NOW < last_activity + ::conf.keepalive) 1327 else if (ev_now () < last_activity + ::conf.keepalive)
1148 w.start (last_activity + ::conf.keepalive); 1328 w.start (last_activity + ::conf.keepalive - ev::now ());
1149 else if (conf->connectmode != conf_node::C_ONDEMAND 1329 else if (conf->connectmode != conf_node::C_ONDEMAND
1150 || THISNODE->connectmode != conf_node::C_ONDEMAND) 1330 || THISNODE->connectmode != conf_node::C_ONDEMAND)
1151 { 1331 {
1152 send_ping (si); 1332 send_ping (si);
1153 w.start (NOW + 5); 1333 w.start (3);
1154 } 1334 }
1155 else if (NOW < last_activity + ::conf.keepalive + 10) 1335 else if (ev_now () < last_activity + ::conf.keepalive + 10)
1156 // hold ondemand connections implicitly a few seconds longer 1336 // hold ondemand connections implicitly a few seconds longer
1157 // should delete octx, though, or something like that ;) 1337 // should delete octx, though, or something like that ;)
1158 w.start (last_activity + ::conf.keepalive + 10); 1338 w.start (last_activity + ::conf.keepalive + 10 - ev::now ());
1159 else 1339 else
1160 reset_connection (); 1340 reset_connection ();
1161} 1341}
1162 1342
1163void connection::send_connect_request (int id) 1343void connection::send_connect_request (int id)
1164{ 1344{
1165 connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols); 1345 connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols);
1166 1346
1167 slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id); 1347 slog (L_TRACE, "%s << PT_CONNECT_REQ(%s)",
1348 conf->nodename, vpn->conns[id - 1]->conf->nodename);
1168 p->hmac_set (octx); 1349 p->hmac_set (octx);
1169 send_vpn_packet (p, si); 1350 send_vpn_packet (p, si);
1170 1351
1171 delete p; 1352 delete p;
1172} 1353}
1173 1354
1355void connection::script_init_env (const char *ext)
1356{
1357 char *env;
1358 asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1359 asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1360 asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1361 0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1362 conf->id & 0xff); putenv (env);
1363}
1364
1174void connection::script_init_env () 1365void connection::script_init_connect_env ()
1175{ 1366{
1176 vpn->script_init_env (); 1367 vpn->script_init_env ();
1177 1368
1178 char *env; 1369 char *env;
1179 asprintf (&env, "DESTID=%d", conf->id); putenv (env); 1370 asprintf (&env, "DESTID=%d", conf->id); putenv (env);
1371 asprintf (&env, "DESTSI=%s", (const char *)si); putenv (env);
1180 asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); 1372 asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1181 asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); 1373 asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1182 asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); 1374 asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1183} 1375}
1184 1376
1377inline const char *
1185const char *connection::script_node_up () 1378connection::script_node_up ()
1186{ 1379{
1187 script_init_env (); 1380 script_init_connect_env ();
1188 1381
1189 putenv ("STATE=up"); 1382 putenv ((char *)"STATE=up");
1190 1383
1191 char *filename; 1384 char *filename;
1192 asprintf (&filename, 1385 asprintf (&filename,
1193 "%s/%s", 1386 "%s/%s",
1194 confbase, 1387 confbase,
1195 ::conf.script_node_up ? ::conf.script_node_up : "node-up"); 1388 ::conf.script_node_up ? ::conf.script_node_up : "node-up");
1196}
1197 1389
1198const char *connection::script_node_down () 1390 return filename;
1391}
1392
1393inline const char *
1394connection::script_node_change ()
1199{ 1395{
1200 script_init_env (); 1396 script_init_connect_env ();
1201 1397
1398 putenv ((char *)"STATE=change");
1399
1400 char *filename;
1401 asprintf (&filename,
1402 "%s/%s",
1403 confbase,
1404 ::conf.script_node_change ? ::conf.script_node_change : "node-change");
1405
1406 return filename;
1407}
1408
1409inline const char *
1410connection::script_node_down ()
1411{
1412 script_init_connect_env ();
1413
1202 putenv ("STATE=down"); 1414 putenv ((char *)"STATE=down");
1203 1415
1204 char *filename; 1416 char *filename;
1205 asprintf (&filename, 1417 asprintf (&filename,
1206 "%s/%s", 1418 "%s/%s",
1207 confbase, 1419 confbase,
1208 ::conf.script_node_down ? ::conf.script_node_down : "node-down"); 1420 ::conf.script_node_down ? ::conf.script_node_down : "node-down");
1421
1422 return filename;
1209} 1423}
1210 1424
1211connection::connection (struct vpn *vpn, conf_node *conf) 1425connection::connection (struct vpn *vpn, conf_node *conf)
1212: vpn(vpn), conf(conf) 1426: vpn(vpn), conf(conf),
1213, rekey (this, &connection::rekey_cb)
1214, keepalive (this, &connection::keepalive_cb)
1215, establish_connection (this, &connection::establish_connection_cb)
1216#if ENABLE_DNS 1427#if ENABLE_DNS
1217, dns (0) 1428 dns (0),
1218#endif 1429#endif
1430 data_queue(conf->max_ttl, conf->max_queue + 1),
1431 vpn_queue(conf->max_ttl, conf->max_queue + 1)
1219{ 1432{
1433 rekey .set<connection, &connection::rekey_cb > (this);
1434 keepalive .set<connection, &connection::keepalive_cb > (this);
1435 establish_connection.set<connection, &connection::establish_connection_cb> (this);
1436
1437 last_establish_attempt = 0.;
1220 octx = ictx = 0; 1438 octx = ictx = 0;
1221 retry_cnt = 0;
1222 1439
1223 if (!conf->protocols) // make sure some protocol is enabled 1440 if (!conf->protocols) // make sure some protocol is enabled
1224 conf->protocols = PROT_UDPv4; 1441 conf->protocols = PROT_UDPv4;
1225 1442
1226 connectmode = conf_node::C_ALWAYS; // initial setting 1443 connectmode = conf->connectmode;
1444
1445 // queue a dummy packet to force an initial connection attempt
1446 if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
1447 vpn_queue.put (new net_packet);
1448
1227 reset_connection (); 1449 reset_connection ();
1228} 1450}
1229 1451
1230connection::~connection () 1452connection::~connection ()
1231{ 1453{

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