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Comparing gvpe/src/connection.C (file contents):
Revision 1.31 by pcg, Sun Feb 8 07:24:25 2004 UTC vs.
Revision 1.39 by pcg, Tue Oct 12 12:06:06 2004 UTC

… …
202// only do action once every x seconds per host whole allowing bursts. 202// only do action once every x seconds per host whole allowing bursts.
203// this implementation ("splay list" ;) is inefficient, 203// this implementation ("splay list" ;) is inefficient,
204// but low on resources. 204// but low on resources.
205struct net_rate_limiter : list<net_rateinfo> 205struct net_rate_limiter : list<net_rateinfo>
206{ 206{
207 static const double ALPHA = 1. - 1. / 600.; // allow bursts 207# define NRL_ALPHA (1. - 1. / 600.) // allow bursts
208 static const double CUTOFF = 10.; // one event every CUTOFF seconds 208# define NRL_CUTOFF 10. // one event every CUTOFF seconds
209 static const double EXPIRE = CUTOFF * 30.; // expire entries after this time 209# define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time
210 static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value 210# define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value
211 211
212 bool can (const sockinfo &si) { return can((u32)si.host); } 212 bool can (const sockinfo &si) { return can((u32)si.host); }
213 bool can (u32 host); 213 bool can (u32 host);
214}; 214};
215 215
… …
220 iterator i; 220 iterator i;
221 221
222 for (i = begin (); i != end (); ) 222 for (i = begin (); i != end (); )
223 if (i->host == host) 223 if (i->host == host)
224 break; 224 break;
225 else if (i->last < NOW - EXPIRE) 225 else if (i->last < NOW - NRL_EXPIRE)
226 i = erase (i); 226 i = erase (i);
227 else 227 else
228 i++; 228 i++;
229 229
230 if (i == end ()) 230 if (i == end ())
231 { 231 {
232 net_rateinfo ri; 232 net_rateinfo ri;
233 233
234 ri.host = host; 234 ri.host = host;
235 ri.pcnt = 1.; 235 ri.pcnt = 1.;
236 ri.diff = MAXDIF; 236 ri.diff = NRL_MAXDIF;
237 ri.last = NOW; 237 ri.last = NOW;
238 238
239 push_front (ri); 239 push_front (ri);
240 240
241 return true; 241 return true;
… …
243 else 243 else
244 { 244 {
245 net_rateinfo ri (*i); 245 net_rateinfo ri (*i);
246 erase (i); 246 erase (i);
247 247
248 ri.pcnt = ri.pcnt * ALPHA; 248 ri.pcnt = ri.pcnt * NRL_ALPHA;
249 ri.diff = ri.diff * ALPHA + (NOW - ri.last); 249 ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last);
250 250
251 ri.last = NOW; 251 ri.last = NOW;
252 252
253 double dif = ri.diff / ri.pcnt; 253 double dif = ri.diff / ri.pcnt;
254 254
255 bool send = dif > CUTOFF; 255 bool send = dif > NRL_CUTOFF;
256 256
257 if (dif > MAXDIF) 257 if (dif > NRL_MAXDIF)
258 { 258 {
259 ri.pcnt = 1.; 259 ri.pcnt = 1.;
260 ri.diff = MAXDIF; 260 ri.diff = NRL_MAXDIF;
261 } 261 }
262 else if (send) 262 else if (send)
263 ri.pcnt++; 263 ri.pcnt++;
264 264
265 push_front (ri); 265 push_front (ri);
… …
456 u8 flags, challengelen, features, pad3; 456 u8 flags, challengelen, features, pad3;
457 u32 cipher_nid, digest_nid, hmac_nid; 457 u32 cipher_nid, digest_nid, hmac_nid;
458 458
459 void setup (ptype type, int dst); 459 void setup (ptype type, int dst);
460 bool chk_config () const; 460 bool chk_config () const;
461
462 static u8 get_features ()
463 {
464 u8 f = 0;
465#if ENABLE_COMPRESSION
466 f |= FEATURE_COMPRESSION;
467#endif
468#if ENABLE_ROHC
469 f |= FEATURE_ROHC;
470#endif
471 return f;
472 }
461}; 473};
462
463#define FEATURES ((ENABLE_COMPRESSION ? FEATURE_COMPRESSION : 0) \
464 | (ENABLE_ROHC ? FEATURE_ROHC : 0))
465 474
466void config_packet::setup (ptype type, int dst) 475void config_packet::setup (ptype type, int dst)
467{ 476{
468 prot_major = PROTOCOL_MAJOR; 477 prot_major = PROTOCOL_MAJOR;
469 prot_minor = PROTOCOL_MINOR; 478 prot_minor = PROTOCOL_MINOR;
470 randsize = RAND_SIZE; 479 randsize = RAND_SIZE;
471 hmaclen = HMACLENGTH; 480 hmaclen = HMACLENGTH;
472 flags = ENABLE_COMPRESSION ? 0x81 : 0x80; 481 flags = ENABLE_COMPRESSION ? 0x81 : 0x80;
473 challengelen = sizeof (rsachallenge); 482 challengelen = sizeof (rsachallenge);
474 features = FEATURES; 483 features = get_features ();
475 484
476 cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); 485 cipher_nid = htonl (EVP_CIPHER_nid (CIPHER));
477 digest_nid = htonl (EVP_MD_type (RSA_HASH)); 486 digest_nid = htonl (EVP_MD_type (RSA_HASH));
478 hmac_nid = htonl (EVP_MD_type (DIGEST)); 487 hmac_nid = htonl (EVP_MD_type (DIGEST));
479 488
… …
580{ 589{
581 if (ictx && octx) 590 if (ictx && octx)
582 { 591 {
583 connectmode = conf->connectmode; 592 connectmode = conf->connectmode;
584 593
594 // make sure rekeying timeouts are slightly asymmetric
585 rekey.start (NOW + ::conf.rekey); 595 rekey.start (NOW + ::conf.rekey
596 + (conf->id > THISNODE->id ? 10 : 0));
586 keepalive.start (NOW + ::conf.keepalive); 597 keepalive.start (NOW + ::conf.keepalive);
587 598
588 // send queued packets 599 // send queued packets
589 if (ictx && octx) 600 if (ictx && octx)
590 { 601 {
… …
733 && connectmode != conf_node::C_DISABLED 744 && connectmode != conf_node::C_DISABLED
734 && NOW > w.at) 745 && NOW > w.at)
735 { 746 {
736 double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; 747 double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6;
737 748
738 if (retry_int < 3600 * 8) 749 if (retry_int < conf->max_retry)
739 retry_cnt++; 750 retry_cnt++;
751 else
752 retry_int = conf->max_retry;
740 753
741 w.start (NOW + retry_int); 754 w.start (NOW + retry_int);
742 755
743 reset_si (); 756 reset_si ();
744 757
… …
772 } 785 }
773 786
774 delete ictx; ictx = 0; 787 delete ictx; ictx = 0;
775 delete octx; octx = 0; 788 delete octx; octx = 0;
776 789
777 si.host= 0; 790 si.host = 0;
778 791
779 last_activity = 0; 792 last_activity = 0;
780 retry_cnt = 0; 793 retry_cnt = 0;
781 794
782 rekey.stop (); 795 rekey.stop ();
… …
923 936
924 // compatibility code, remove when no longer required 937 // compatibility code, remove when no longer required
925 if (p->flags & 1) p->features |= FEATURE_COMPRESSION; 938 if (p->flags & 1) p->features |= FEATURE_COMPRESSION;
926 939
927 conf->protocols = p->protocols; 940 conf->protocols = p->protocols;
928 features = p->features & FEATURES; 941 features = p->features & config_packet::get_features ();
929 942
930 send_auth_response (rsi, p->id, k); 943 send_auth_response (rsi, p->id, k);
931 944
932 connection_established (); 945 connection_established ();
933 946
… …
1047 si = rsi; 1060 si = rsi;
1048 1061
1049 slog (L_INFO, _("%s(%s): socket address changed to %s"), 1062 slog (L_INFO, _("%s(%s): socket address changed to %s"),
1050 conf->nodename, (const char *)si, (const char *)rsi); 1063 conf->nodename, (const char *)si, (const char *)rsi);
1051 } 1064 }
1052
1053 delete d;
1054
1055 break;
1056 } 1065 }
1066
1067 delete d;
1068 break;
1057 } 1069 }
1058 } 1070 }
1059 1071
1060 send_reset (rsi); 1072 send_reset (rsi);
1061 break; 1073 break;
… …
1086 break; 1098 break;
1087 1099
1088 case vpn_packet::PT_CONNECT_INFO: 1100 case vpn_packet::PT_CONNECT_INFO:
1089 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) 1101 if (ictx && octx && rsi == si && pkt->hmac_chk (ictx))
1090 { 1102 {
1091 connect_info_packet *p = (connect_info_packet *) pkt; 1103 connect_info_packet *p = (connect_info_packet *)pkt;
1092 1104
1093 assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything 1105 if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything
1094 1106 {
1095 connection *c = vpn->conns[p->id - 1]; 1107 connection *c = vpn->conns[p->id - 1];
1096 1108
1097 c->conf->protocols = p->protocols; 1109 c->conf->protocols = p->protocols;
1098 protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); 1110 protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf));
1099 p->si.upgrade_protocol (protocol, c->conf); 1111 p->si.upgrade_protocol (protocol, c->conf);
1100 1112
1101 slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", 1113 slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)",
1102 conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); 1114 conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx);
1103 1115
1104 const sockinfo &dsi = forward_si (p->si); 1116 const sockinfo &dsi = forward_si (p->si);
1105 1117
1106 if (dsi.valid ()) 1118 if (dsi.valid ())
1107 c->send_auth_request (dsi, true); 1119 c->send_auth_request (dsi, true);
1120 }
1108 } 1121 }
1109 1122
1110 break; 1123 break;
1111 1124
1112 default: 1125 default:

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