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Comparing gvpe/src/connection.C (file contents):
Revision 1.49 by pcg, Sat Mar 12 18:10:40 2005 UTC vs.
Revision 1.68 by pcg, Thu Aug 7 17:30:27 2008 UTC

… …
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
91struct rsa_entry { 87struct 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
97struct rsa_cache : list<rsa_entry> 94struct rsa_cache : list<rsa_entry>
98{ 95{
99 void cleaner_cb (time_watcher &w); time_watcher cleaner; 96 inline 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
143void rsa_cache::cleaner_cb (time_watcher &w) 142void 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}
156 155
157////////////////////////////////////////////////////////////////////////////// 156//////////////////////////////////////////////////////////////////////////////
158 157
159void pkt_queue::put (net_packet *p) 158pkt_queue::pkt_queue (double max_ttl, int max_queue)
159: max_ttl (max_ttl), max_queue (max_queue)
160{ 160{
161 if (queue[i]) 161 queue = new pkt [max_queue];
162 {
163 delete queue[i];
164 j = (j + 1) % QUEUEDEPTH;
165 }
166 162
167 queue[i] = p;
168
169 i = (i + 1) % QUEUEDEPTH;
170}
171
172net_packet *pkt_queue::get ()
173{
174 net_packet *p = queue[j];
175
176 if (p)
177 {
178 queue[j] = 0;
179 j = (j + 1) % QUEUEDEPTH;
180 }
181
182 return p;
183}
184
185pkt_queue::pkt_queue ()
186{
187 memset (queue, 0, sizeof (queue));
188 i = 0; 163 i = 0;
189 j = 0; 164 j = 0;
165
166 expire.set<pkt_queue, &pkt_queue::expire_cb> (this);
190} 167}
191 168
192pkt_queue::~pkt_queue () 169pkt_queue::~pkt_queue ()
193{ 170{
194 for (i = QUEUEDEPTH; --i > 0; ) 171 while (net_packet *p = get ())
172 delete p;
173
195 delete queue[i]; 174 delete [] queue;
196} 175}
197 176
177void pkt_queue::expire_cb (ev::timer &w, int revents)
178{
179 ev_tstamp expire = ev_now () - max_ttl;
180
181 for (;;)
182 {
183 if (empty ())
184 break;
185
186 double diff = queue[j].tstamp - expire;
187
188 if (diff >= 0.)
189 {
190 w.start (diff > 0.5 ? diff : 0.5);
191 break;
192 }
193
194 delete get ();
195 }
196}
197
198void pkt_queue::put (net_packet *p)
199{
200 ev_tstamp now = ev_now ();
201
202 // start expiry timer
203 if (empty ())
204 expire.start (max_ttl);
205
206 int ni = i + 1 == max_queue ? 0 : i + 1;
207
208 if (ni == j)
209 delete get ();
210
211 queue[i].pkt = p;
212 queue[i].tstamp = now;
213
214 i = ni;
215}
216
217net_packet *pkt_queue::get ()
218{
219 if (empty ())
220 return 0;
221
222 net_packet *p = queue[j].pkt;
223 queue[j].pkt = 0;
224
225 j = j + 1 == max_queue ? 0 : j + 1;
226
227 return p;
228}
229
198struct net_rateinfo { 230struct net_rateinfo
231{
199 u32 host; 232 u32 host;
200 double pcnt, diff; 233 double pcnt, diff;
201 tstamp last; 234 tstamp last;
202}; 235};
203 236
… …
222 iterator i; 255 iterator i;
223 256
224 for (i = begin (); i != end (); ) 257 for (i = begin (); i != end (); )
225 if (i->host == host) 258 if (i->host == host)
226 break; 259 break;
227 else if (i->last < NOW - NRL_EXPIRE) 260 else if (i->last < ev_now () - NRL_EXPIRE)
228 i = erase (i); 261 i = erase (i);
229 else 262 else
230 i++; 263 i++;
231 264
232 if (i == end ()) 265 if (i == end ())
… …
234 net_rateinfo ri; 267 net_rateinfo ri;
235 268
236 ri.host = host; 269 ri.host = host;
237 ri.pcnt = 1.; 270 ri.pcnt = 1.;
238 ri.diff = NRL_MAXDIF; 271 ri.diff = NRL_MAXDIF;
239 ri.last = NOW; 272 ri.last = ev_now ();
240 273
241 push_front (ri); 274 push_front (ri);
242 275
243 return true; 276 return true;
244 } 277 }
… …
246 { 279 {
247 net_rateinfo ri (*i); 280 net_rateinfo ri (*i);
248 erase (i); 281 erase (i);
249 282
250 ri.pcnt = ri.pcnt * NRL_ALPHA; 283 ri.pcnt = ri.pcnt * NRL_ALPHA;
251 ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last); 284 ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last);
252 285
253 ri.last = NOW; 286 ri.last = ev_now ();
254 287
255 double dif = ri.diff / ri.pcnt; 288 double dif = ri.diff / ri.pcnt;
256 289
257 bool send = dif > NRL_CUTOFF; 290 bool send = dif > NRL_CUTOFF;
258 291
… …
467#if ENABLE_COMPRESSION 500#if ENABLE_COMPRESSION
468 f |= FEATURE_COMPRESSION; 501 f |= FEATURE_COMPRESSION;
469#endif 502#endif
470#if ENABLE_ROHC 503#if ENABLE_ROHC
471 f |= FEATURE_ROHC; 504 f |= FEATURE_ROHC;
505#endif
506#if ENABLE_BRIDGING
507 f |= FEATURE_BRIDGING;
472#endif 508#endif
473 return f; 509 return f;
474 } 510 }
475}; 511};
476 512
… …
583///////////////////////////////////////////////////////////////////////////// 619/////////////////////////////////////////////////////////////////////////////
584 620
585void 621void
586connection::connection_established () 622connection::connection_established ()
587{ 623{
624 slog (L_TRACE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx);
625
588 if (ictx && octx) 626 if (ictx && octx)
589 { 627 {
590 connectmode = conf->connectmode;
591
592 // make sure rekeying timeouts are slightly asymmetric 628 // make sure rekeying timeouts are slightly asymmetric
593 rekey.start (NOW + ::conf.rekey 629 ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
594 + (conf->id > THISNODE->id ? 10 : 0)); 630 rekey.start (rekey_interval, rekey_interval);
595 keepalive.start (NOW + ::conf.keepalive); 631 keepalive.start (::conf.keepalive);
596 632
597 // send queued packets 633 // send queued packets
598 if (ictx && octx) 634 if (ictx && octx)
599 { 635 {
600 while (tap_packet *p = (tap_packet *)data_queue.get ()) 636 while (tap_packet *p = (tap_packet *)data_queue.get ())
601 { 637 {
602 send_data_packet (p); 638 if (p->len) send_data_packet (p);
603 delete p; 639 delete p;
604 } 640 }
605 641
606 while (vpn_packet *p = (vpn_packet *)vpn_queue.get ()) 642 while (vpn_packet *p = (vpn_packet *)vpn_queue.get ())
607 { 643 {
608 send_vpn_packet (p, si, IPTOS_RELIABILITY); 644 if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
609 delete p; 645 delete p;
610 } 646 }
611 } 647 }
612 } 648 }
613 else 649 else
614 { 650 {
615 retry_cnt = 0; 651 retry_cnt = 0;
616 establish_connection.start (NOW + 5); 652 establish_connection.start (5);
617 keepalive.stop (); 653 keepalive.stop ();
618 rekey.stop (); 654 rekey.stop ();
619 } 655 }
620} 656}
621 657
… …
626 662
627 // mask out protocols we cannot establish 663 // mask out protocols we cannot establish
628 if (!conf->udp_port) protocol &= ~PROT_UDPv4; 664 if (!conf->udp_port) protocol &= ~PROT_UDPv4;
629 if (!conf->tcp_port) protocol &= ~PROT_TCPv4; 665 if (!conf->tcp_port) protocol &= ~PROT_TCPv4;
630 if (!conf->dns_port) protocol &= ~PROT_DNSv4; 666 if (!conf->dns_port) protocol &= ~PROT_DNSv4;
667
668 if (protocol
669 && (!conf->can_direct (THISNODE)
670 || !THISNODE->can_direct (conf)))
671 {
672 slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename);
673 protocol = 0;
674 }
631 675
632 si.set (conf, protocol); 676 si.set (conf, protocol);
633} 677}
634 678
635// ensure sockinfo is valid, forward if necessary 679// ensure sockinfo is valid, forward if necessary
… …
721} 765}
722 766
723void 767void
724connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) 768connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols)
725{ 769{
726 slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n", 770 slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)",
727 conf->id, rid, (const char *)rsi); 771 conf->id, rid, (const char *)rsi);
728 772
729 connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); 773 connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols);
730 774
731 r->hmac_set (octx); 775 r->hmac_set (octx);
732 send_vpn_packet (r, si); 776 send_vpn_packet (r, si);
733 777
734 delete r; 778 delete r;
735} 779}
736 780
737void 781inline void
738connection::establish_connection_cb (time_watcher &w) 782connection::establish_connection_cb (ev::timer &w, int revents)
739{ 783{
740 if (!ictx 784 if (!ictx
741 && conf != THISNODE 785 && conf != THISNODE
742 && connectmode != conf_node::C_NEVER 786 && connectmode != conf_node::C_NEVER
743 && connectmode != conf_node::C_DISABLED 787 && connectmode != conf_node::C_DISABLED
744 && NOW > w.at) 788 && !w.is_active ())
745 { 789 {
746 w.at = TSTAMP_MAX; // first disable this watcher in case of recursion 790 // a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
791 // and stop trying. should probably be handled by a per-connection expire handler.
792 if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
793 {
794 reset_connection ();
795 return;
796 }
747 797
748 double retry_int = double (retry_cnt & 3 798 last_establish_attempt = ev_now ();
799
800 ev::tstamp retry_int = ev::tstamp (retry_cnt & 3
749 ? (retry_cnt & 3) + 1 801 ? (retry_cnt & 3) + 1
750 : 1 << (retry_cnt >> 2)); 802 : 1 << (retry_cnt >> 2));
751 803
752 reset_si (); 804 reset_si ();
753 805
754 bool slow = si.prot & PROT_SLOW; 806 bool slow = si.prot & PROT_SLOW;
755 807
756 if (si.prot && !si.host) 808 if (si.prot && !si.host)
809 {
810 slog (L_TRACE, _("%s: connection request (indirect)"), conf->nodename);
811 /*TODO*/ /* start the timer so we don't recurse endlessly */
812 w.start (1);
757 vpn->send_connect_request (conf->id); 813 vpn->send_connect_request (conf->id);
814 }
758 else 815 else
759 { 816 {
817 slog (L_TRACE, _("%s: connection request (direct)"), conf->nodename, !!ictx, !!octx);
818
760 const sockinfo &dsi = forward_si (si); 819 const sockinfo &dsi = forward_si (si);
761 820
762 slow = slow || (dsi.prot & PROT_SLOW); 821 slow = slow || (dsi.prot & PROT_SLOW);
763 822
764 if (dsi.valid () && auth_rate_limiter.can (dsi)) 823 if (dsi.valid () && auth_rate_limiter.can (dsi))
… …
768 else 827 else
769 send_ping (dsi, 0); 828 send_ping (dsi, 0);
770 } 829 }
771 } 830 }
772 831
773 retry_int *= slow ? 8. : 0.7; 832 retry_int *= slow ? 8. : 0.9;
774 833
775 if (retry_int < conf->max_retry) 834 if (retry_int < conf->max_retry)
776 retry_cnt++; 835 retry_cnt++;
777 else 836 else
778 retry_int = conf->max_retry; 837 retry_int = conf->max_retry;
779 838
780 w.start (NOW + retry_int); 839 w.start (retry_int);
781 } 840 }
782} 841}
783 842
784void 843void
785connection::reset_connection () 844connection::reset_connection ()
… …
788 { 847 {
789 slog (L_INFO, _("%s(%s): connection lost"), 848 slog (L_INFO, _("%s(%s): connection lost"),
790 conf->nodename, (const char *)si); 849 conf->nodename, (const char *)si);
791 850
792 if (::conf.script_node_down) 851 if (::conf.script_node_down)
793 run_script (run_script_cb (this, &connection::script_node_down), false); 852 {
853 run_script_cb cb;
854 cb.set<connection, &connection::script_node_down> (this);
855 if (!run_script (cb, false))
856 slog (L_WARN, _("node-down command execution failed, continuing."));
857 }
794 } 858 }
795 859
796 delete ictx; ictx = 0; 860 delete ictx; ictx = 0;
797 delete octx; octx = 0; 861 delete octx; octx = 0;
798#if ENABLE_DNS 862#if ENABLE_DNS
… …
816 send_reset (si); 880 send_reset (si);
817 881
818 reset_connection (); 882 reset_connection ();
819} 883}
820 884
821void 885inline void
822connection::rekey_cb (time_watcher &w) 886connection::rekey_cb (ev::timer &w, int revents)
823{ 887{
824 reset_connection (); 888 reset_connection ();
825 establish_connection (); 889 establish_connection ();
826} 890}
827 891
… …
843 if (oseqno > MAX_SEQNO) 907 if (oseqno > MAX_SEQNO)
844 rekey (); 908 rekey ();
845} 909}
846 910
847void 911void
912connection::post_inject_queue ()
913{
914 // force a connection every now and when when packets are sent (max 1/s)
915 if (ev_now () - last_establish_attempt >= 0.95) // arbitrary
916 establish_connection.stop ();
917
918 establish_connection ();
919}
920
921void
848connection::inject_data_packet (tap_packet *pkt, bool broadcast/*TODO DDD*/) 922connection::inject_data_packet (tap_packet *pkt)
849{ 923{
850 if (ictx && octx) 924 if (ictx && octx)
851 send_data_packet (pkt); 925 send_data_packet (pkt);
852 else 926 else
853 { 927 {
854 if (!broadcast)//DDDD
855 data_queue.put (new tap_packet (*pkt)); 928 data_queue.put (new tap_packet (*pkt));
856 929 post_inject_queue ();
857 establish_connection ();
858 } 930 }
859} 931}
860 932
861void connection::inject_vpn_packet (vpn_packet *pkt, int tos) 933void connection::inject_vpn_packet (vpn_packet *pkt, int tos)
862{ 934{
863 if (ictx && octx) 935 if (ictx && octx)
864 send_vpn_packet (pkt, si, tos); 936 send_vpn_packet (pkt, si, tos);
865 else 937 else
866 { 938 {
867 vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt)); 939 vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt));
868 940 post_inject_queue ();
869 establish_connection ();
870 } 941 }
871} 942}
872 943
873void 944void
874connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) 945connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
875{ 946{
876 last_activity = NOW; 947 last_activity = ev_now ();
877 948
878 slog (L_NOISE, "<<%d received packet type %d from %d to %d", 949 slog (L_NOISE, "<<%d received packet type %d from %d to %d",
879 conf->id, pkt->typ (), pkt->src (), pkt->dst ()); 950 conf->id, pkt->typ (), pkt->src (), pkt->dst ());
951
952 if (connectmode == conf_node::C_DISABLED)
953 return;
880 954
881 switch (pkt->typ ()) 955 switch (pkt->typ ())
882 { 956 {
883 case vpn_packet::PT_PING: 957 case vpn_packet::PT_PING:
884 // we send pings instead of auth packets after some retries, 958 // we send pings instead of auth packets after some retries,
… …
1019 slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), 1093 slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"),
1020 conf->nodename, (const char *)rsi, 1094 conf->nodename, (const char *)rsi,
1021 p->prot_major, p->prot_minor); 1095 p->prot_major, p->prot_minor);
1022 1096
1023 if (::conf.script_node_up) 1097 if (::conf.script_node_up)
1024 run_script (run_script_cb (this, &connection::script_node_up), false); 1098 {
1099 run_script_cb cb;
1100 cb.set<connection, &connection::script_node_up> (this);
1101 if (!run_script (cb, false))
1102 slog (L_WARN, _("node-up command execution failed, continuing."));
1103 }
1025 1104
1026 break; 1105 break;
1027 } 1106 }
1028 else 1107 else
1029 slog (L_ERR, _("%s(%s): sent and received challenge do not match"), 1108 slog (L_ERR, _("%s(%s): sent and received challenge do not match"),
… …
1063 { 1142 {
1064 vpn->tap->send (d); 1143 vpn->tap->send (d);
1065 1144
1066 if (si != rsi) 1145 if (si != rsi)
1067 { 1146 {
1068 // fast re-sync on connection changes, useful especially for tcp/ip 1147 // fast re-sync on source address changes, useful especially for tcp/ip
1069 si = rsi; 1148 si = rsi;
1070 1149
1071 slog (L_INFO, _("%s(%s): socket address changed to %s"), 1150 slog (L_INFO, _("%s(%s): socket address changed to %s"),
1072 conf->nodename, (const char *)si, (const char *)rsi); 1151 conf->nodename, (const char *)si, (const char *)rsi);
1073 } 1152 }
… …
1084 case vpn_packet::PT_CONNECT_REQ: 1163 case vpn_packet::PT_CONNECT_REQ:
1085 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) 1164 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1086 { 1165 {
1087 connect_req_packet *p = (connect_req_packet *) pkt; 1166 connect_req_packet *p = (connect_req_packet *) pkt;
1088 1167
1089 assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything 1168 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 { 1169 {
1170 connection *c = vpn->conns[p->id - 1];
1171 conf->protocols = p->protocols;
1172
1173 slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]",
1174 conf->id, p->id, c->ictx && c->octx);
1175
1176 if (c->ictx && c->octx)
1177 {
1098 // send connect_info packets to both sides, in case one is 1178 // send connect_info packets to both sides, in case one is
1099 // behind a nat firewall (or both ;) 1179 // behind a nat firewall (or both ;)
1100 c->send_connect_info (conf->id, si, conf->protocols); 1180 c->send_connect_info (conf->id, si, conf->protocols);
1101 send_connect_info (c->conf->id, c->si, c->conf->protocols); 1181 send_connect_info (c->conf->id, c->si, c->conf->protocols);
1182 }
1183 else
1184 c->establish_connection ();
1102 } 1185 }
1103 else 1186 else
1104 c->establish_connection (); 1187 slog (L_WARN,
1188 _("received authenticated connection request from unknown node #%d, config file mismatch?"),
1189 p->id);
1105 } 1190 }
1106 1191
1107 break; 1192 break;
1108 1193
1109 case vpn_packet::PT_CONNECT_INFO: 1194 case vpn_packet::PT_CONNECT_INFO:
1110 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) 1195 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1111 { 1196 {
1112 connect_info_packet *p = (connect_info_packet *)pkt; 1197 connect_info_packet *p = (connect_info_packet *)pkt;
1113 1198
1114 if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything 1199 if (p->id > 0 && p->id <= vpn->conns.size ())
1115 { 1200 {
1116 connection *c = vpn->conns[p->id - 1]; 1201 connection *c = vpn->conns[p->id - 1];
1117 1202
1118 c->conf->protocols = p->protocols; 1203 c->conf->protocols = p->protocols;
1119 protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); 1204 protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
… …
1125 const sockinfo &dsi = forward_si (p->si); 1210 const sockinfo &dsi = forward_si (p->si);
1126 1211
1127 if (dsi.valid ()) 1212 if (dsi.valid ())
1128 c->send_auth_request (dsi, true); 1213 c->send_auth_request (dsi, true);
1129 } 1214 }
1215 else
1216 slog (L_WARN,
1217 _("received authenticated connection request from unknown node #%d, config file mismatch?"),
1218 p->id);
1130 } 1219 }
1131 1220
1132 break; 1221 break;
1133 1222
1134 default: 1223 default:
1135 send_reset (rsi); 1224 send_reset (rsi);
1136 break; 1225 break;
1137 } 1226 }
1138} 1227}
1139 1228
1140void connection::keepalive_cb (time_watcher &w) 1229inline void
1230connection::keepalive_cb (ev::timer &w, int revents)
1141{ 1231{
1142 if (NOW >= last_activity + ::conf.keepalive + 30) 1232 if (ev_now () >= last_activity + ::conf.keepalive + 30)
1143 { 1233 {
1144 reset_connection (); 1234 reset_connection ();
1145 establish_connection (); 1235 establish_connection ();
1146 } 1236 }
1147 else if (NOW < last_activity + ::conf.keepalive) 1237 else if (ev_now () < last_activity + ::conf.keepalive)
1148 w.start (last_activity + ::conf.keepalive); 1238 w.start (last_activity + ::conf.keepalive - ev::now ());
1149 else if (conf->connectmode != conf_node::C_ONDEMAND 1239 else if (conf->connectmode != conf_node::C_ONDEMAND
1150 || THISNODE->connectmode != conf_node::C_ONDEMAND) 1240 || THISNODE->connectmode != conf_node::C_ONDEMAND)
1151 { 1241 {
1152 send_ping (si); 1242 send_ping (si);
1153 w.start (NOW + 5); 1243 w.start (5);
1154 } 1244 }
1155 else if (NOW < last_activity + ::conf.keepalive + 10) 1245 else if (ev_now () < last_activity + ::conf.keepalive + 10)
1156 // hold ondemand connections implicitly a few seconds longer 1246 // hold ondemand connections implicitly a few seconds longer
1157 // should delete octx, though, or something like that ;) 1247 // should delete octx, though, or something like that ;)
1158 w.start (last_activity + ::conf.keepalive + 10); 1248 w.start (last_activity + ::conf.keepalive + 10 - ev::now ());
1159 else 1249 else
1160 reset_connection (); 1250 reset_connection ();
1161} 1251}
1162 1252
1163void connection::send_connect_request (int id) 1253void connection::send_connect_request (int id)
… …
1169 send_vpn_packet (p, si); 1259 send_vpn_packet (p, si);
1170 1260
1171 delete p; 1261 delete p;
1172} 1262}
1173 1263
1264void connection::script_init_env (const char *ext)
1265{
1266 char *env;
1267 asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env);
1268 asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env);
1269 asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext,
1270 0xfe, 0xfd, 0x80, 0x00, conf->id >> 8,
1271 conf->id & 0xff); putenv (env);
1272}
1273
1174void connection::script_node () 1274void connection::script_init_connect_env ()
1175{ 1275{
1176 vpn->script_if_up (); 1276 vpn->script_init_env ();
1177 1277
1178 char *env; 1278 char *env;
1179 asprintf (&env, "DESTID=%d", conf->id); putenv (env); 1279 asprintf (&env, "DESTID=%d", conf->id); putenv (env);
1180 asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); 1280 asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env);
1181 asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); 1281 asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env);
1182 asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); 1282 asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env);
1183} 1283}
1184 1284
1285inline const char *
1185const char *connection::script_node_up () 1286connection::script_node_up ()
1186{ 1287{
1187 script_node (); 1288 script_init_connect_env ();
1188 1289
1189 putenv ("STATE=up"); 1290 putenv ((char *)"STATE=up");
1190 1291
1292 char *filename;
1293 asprintf (&filename,
1294 "%s/%s",
1295 confbase,
1191 return ::conf.script_node_up ? ::conf.script_node_up : "node-up"; 1296 ::conf.script_node_up ? ::conf.script_node_up : "node-up");
1192}
1193 1297
1298 return filename;
1299}
1300
1301inline const char *
1194const char *connection::script_node_down () 1302connection::script_node_down ()
1195{ 1303{
1196 script_node (); 1304 script_init_connect_env ();
1197 1305
1198 putenv ("STATE=down"); 1306 putenv ((char *)"STATE=down");
1199 1307
1200 return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; 1308 char *filename;
1309 asprintf (&filename,
1310 "%s/%s",
1311 confbase,
1312 ::conf.script_node_down ? ::conf.script_node_down : "node-down");
1313
1314 return filename;
1201} 1315}
1202 1316
1203connection::connection (struct vpn *vpn, conf_node *conf) 1317connection::connection (struct vpn *vpn, conf_node *conf)
1204: vpn(vpn), conf(conf) 1318: vpn(vpn), conf(conf),
1205, rekey (this, &connection::rekey_cb)
1206, keepalive (this, &connection::keepalive_cb)
1207, establish_connection (this, &connection::establish_connection_cb)
1208#if ENABLE_DNS 1319#if ENABLE_DNS
1209, dns (0) 1320 dns (0),
1210#endif 1321#endif
1322 data_queue(conf->max_ttl, conf->max_queue),
1323 vpn_queue(conf->max_ttl, conf->max_queue)
1211{ 1324{
1325 rekey .set<connection, &connection::rekey_cb > (this);
1326 keepalive .set<connection, &connection::keepalive_cb > (this);
1327 establish_connection.set<connection, &connection::establish_connection_cb> (this);
1328
1329 last_establish_attempt = 0.;
1212 octx = ictx = 0; 1330 octx = ictx = 0;
1213 retry_cnt = 0;
1214 1331
1215 if (!conf->protocols) // make sure some protocol is enabled 1332 if (!conf->protocols) // make sure some protocol is enabled
1216 conf->protocols = PROT_UDPv4; 1333 conf->protocols = PROT_UDPv4;
1217 1334
1218 connectmode = conf_node::C_ALWAYS; // initial setting 1335 connectmode = conf->connectmode;
1336
1337 // queue a dummy packet to force an initial connection attempt
1338 if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
1339 vpn_queue.put (new net_packet);
1340
1219 reset_connection (); 1341 reset_connection ();
1220} 1342}
1221 1343
1222connection::~connection () 1344connection::~connection ()
1223{ 1345{

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