summaryrefslogtreecommitdiff
path: root/src/Sockets/TcpSocket.cpp
blob: 960ac35da782e816f16b7d31f9609f96392f2bda (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
/** \file TcpSocket.cpp
 **	\date  2004-02-13
 **	\author grymse@alhem.net
**/
/*
Copyright (C) 2004-2007  Anders Hedstrom

This library is made available under the terms of the GNU GPL.

If you would like to use this library in a closed-source application,
a separate license agreement is available. For information about 
the closed-source license agreement for the C++ sockets library,
please visit http://www.alhem.net/Sockets/license.html and/or
email license@alhem.net.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
#ifdef _WIN32
#ifdef _MSC_VER
#pragma warning(disable:4786)
#endif
#include <stdlib.h>
#else
#include <errno.h>
#endif
#include "ISocketHandler.h"
#include <fcntl.h>
#include <assert.h>
#include <stdarg.h>
#ifdef HAVE_OPENSSL
#include <openssl/rand.h>
#include <openssl/err.h>
#endif

#include "TcpSocket.h"
#include "Utility.h"
#include "Ipv4Address.h"
#include "Ipv6Address.h"
#include "Mutex.h"
#include "IFile.h"

#ifdef SOCKETS_NAMESPACE
namespace SOCKETS_NAMESPACE {
#endif


#ifdef _DEBUG
#define DEB(x) x
#else
#define DEB(x) 
#endif


// statics
#ifdef HAVE_OPENSSL
SSLInitializer TcpSocket::m_ssl_init;
#endif


// thanks, q
#ifdef _MSC_VER
#pragma warning(disable:4355)
#endif
TcpSocket::TcpSocket(ISocketHandler& h) : StreamSocket(h)
,ibuf(TCP_BUFSIZE_READ)
,m_b_input_buffer_disabled(false)
,m_bytes_sent(0)
,m_bytes_received(0)
,m_skip_c(false)
#ifdef SOCKETS_DYNAMIC_TEMP
,m_buf(new char[TCP_BUFSIZE_READ + 1])
#endif
,m_obuf_top(NULL)
,m_transfer_limit(0)
,m_output_length(0)
#ifdef HAVE_OPENSSL
,m_ssl_ctx(NULL)
,m_ssl(NULL)
,m_sbio(NULL)
#endif
#ifdef ENABLE_SOCKS4
,m_socks4_state(0)
#endif
#ifdef ENABLE_RESOLVER
,m_resolver_id(0)
#endif
#ifdef ENABLE_RECONNECT
,m_b_reconnect(false)
,m_b_is_reconnect(false)
#endif
{
}
#ifdef _MSC_VER
#pragma warning(default:4355)
#endif


#ifdef _MSC_VER
#pragma warning(disable:4355)
#endif
TcpSocket::TcpSocket(ISocketHandler& h,size_t isize,size_t osize) : StreamSocket(h)
,ibuf(isize)
,m_b_input_buffer_disabled(false)
,m_bytes_sent(0)
,m_bytes_received(0)
,m_skip_c(false)
#ifdef SOCKETS_DYNAMIC_TEMP
,m_buf(new char[TCP_BUFSIZE_READ + 1])
#endif
,m_obuf_top(NULL)
,m_transfer_limit(0)
,m_output_length(0)
#ifdef HAVE_OPENSSL
,m_ssl_ctx(NULL)
,m_ssl(NULL)
,m_sbio(NULL)
#endif
#ifdef ENABLE_SOCKS4
,m_socks4_state(0)
#endif
#ifdef ENABLE_RESOLVER
,m_resolver_id(0)
#endif
#ifdef ENABLE_RECONNECT
,m_b_reconnect(false)
,m_b_is_reconnect(false)
#endif
{
}
#ifdef _MSC_VER
#pragma warning(default:4355)
#endif


TcpSocket::~TcpSocket()
{
#ifdef SOCKETS_DYNAMIC_TEMP
	delete[] m_buf;
#endif
	// %! empty m_obuf
#ifdef HAVE_OPENSSL
	if (m_ssl)
	{
		SSL_free(m_ssl);
	}
#endif
}


bool TcpSocket::Open(ipaddr_t ip,port_t port,bool skip_socks)
{
	Ipv4Address ad(ip, port);
	Ipv4Address local;
	return Open(ad, local, skip_socks);
}


#ifdef ENABLE_IPV6
#ifdef IPPROTO_IPV6
bool TcpSocket::Open(in6_addr ip,port_t port,bool skip_socks)
{
	Ipv6Address ad(ip, port);
	return Open(ad, skip_socks);
}
#endif
#endif


bool TcpSocket::Open(SocketAddress& ad,bool skip_socks)
{
	Ipv4Address bind_ad("0.0.0.0", 0);
	return Open(ad, bind_ad, skip_socks);
}


bool TcpSocket::Open(SocketAddress& ad,SocketAddress& bind_ad,bool skip_socks)
{
	if (!ad.IsValid())
	{
		Handler().LogError(this, "Open", 0, "Invalid SocketAddress", LOG_LEVEL_FATAL);
		SetCloseAndDelete();
		return false;
	}
	if (Handler().GetCount() >= FD_SETSIZE)
	{
		Handler().LogError(this, "Open", 0, "no space left in fd_set", LOG_LEVEL_FATAL);
		SetCloseAndDelete();
		return false;
	}
	SetConnecting(false);
#ifdef ENABLE_SOCKS4
	SetSocks4(false);
#endif
	// check for pooling
#ifdef ENABLE_POOL
	if (Handler().PoolEnabled())
	{
		ISocketHandler::PoolSocket *pools = Handler().FindConnection(SOCK_STREAM, "tcp", ad);
		if (pools)
		{
			CopyConnection( pools );
			delete pools;

			SetIsClient();
			SetCallOnConnect(); // ISocketHandler must call OnConnect
			Handler().LogError(this, "SetCallOnConnect", 0, "Found pooled connection", LOG_LEVEL_INFO);
			return true;
		}
	}
#endif
	// if not, create new connection
	SOCKET s = CreateSocket(ad.GetFamily(), SOCK_STREAM, "tcp");
	if (s == INVALID_SOCKET)
	{
		return false;
	}
	// socket must be nonblocking for async connect
	if (!SetNonblocking(true, s))
	{
		SetCloseAndDelete();
		closesocket(s);
		return false;
	}
#ifdef ENABLE_POOL
	SetIsClient(); // client because we connect
#endif
	SetClientRemoteAddress(ad);
	int n = 0;
	if (bind_ad.GetPort() != 0)
	{
		bind(s, bind_ad, bind_ad);
	}
#ifdef ENABLE_SOCKS4
	if (!skip_socks && GetSocks4Host() && GetSocks4Port())
	{
		Ipv4Address sa(GetSocks4Host(), GetSocks4Port());
		{
			std::string sockshost;
			Utility::l2ip(GetSocks4Host(), sockshost);
			Handler().LogError(this, "Open", 0, "Connecting to socks4 server @ " + sockshost + ":" +
				Utility::l2string(GetSocks4Port()), LOG_LEVEL_INFO);
		}
		SetSocks4();
		n = connect(s, sa, sa);
		SetRemoteAddress(sa);
	}
	else
#endif
	{
		n = connect(s, ad, ad);
		SetRemoteAddress(ad);
	}
	if (n == -1)
	{
		// check error code that means a connect is in progress
#ifdef _WIN32
		if (Errno == WSAEWOULDBLOCK)
#else
		if (Errno == EINPROGRESS)
#endif
		{
			Attach(s);
			SetConnecting( true ); // this flag will control fd_set's
		}
		else
#ifdef ENABLE_SOCKS4
		if (Socks4() && Handler().Socks4TryDirect() ) // retry
		{
			closesocket(s);
			return Open(ad, true);
		}
		else
#endif
#ifdef ENABLE_RECONNECT
		if (Reconnect())
		{
			Handler().LogError(this, "connect: failed, reconnect pending", Errno, StrError(Errno), LOG_LEVEL_INFO);
			Attach(s);
			SetConnecting( true ); // this flag will control fd_set's
		}
		else
#endif
		{
			Handler().LogError(this, "connect: failed", Errno, StrError(Errno), LOG_LEVEL_FATAL);
			SetCloseAndDelete();
			closesocket(s);
			return false;
		}
	}
	else
	{
		Attach(s);
		SetCallOnConnect(); // ISocketHandler must call OnConnect
	}

	// 'true' means connected or connecting(not yet connected)
	// 'false' means something failed
	return true; //!Connecting();
}


bool TcpSocket::Open(const std::string &host,port_t port)
{
#ifdef ENABLE_IPV6
#ifdef IPPROTO_IPV6
	if (IsIpv6())
	{
#ifdef ENABLE_RESOLVER
		if (!Handler().ResolverEnabled() || Utility::isipv6(host) )
		{
#endif
			in6_addr a;
			if (!Utility::u2ip(host, a))
			{
				SetCloseAndDelete();
				return false;
			}
			Ipv6Address ad(a, port);
			Ipv6Address local;
			return Open(ad, local);
#ifdef ENABLE_RESOLVER
		}
		m_resolver_id = Resolve6(host, port);
		return true;
#endif
	}
#endif
#endif
#ifdef ENABLE_RESOLVER
	if (!Handler().ResolverEnabled() || Utility::isipv4(host) )
	{
#endif
		ipaddr_t l;
		if (!Utility::u2ip(host,l))
		{
			SetCloseAndDelete();
			return false;
		}
		Ipv4Address ad(l, port);
		Ipv4Address local;
		return Open(ad, local);
#ifdef ENABLE_RESOLVER
	}
	// resolve using async resolver thread
	m_resolver_id = Resolve(host, port);
	return true;
#endif
}


#ifdef ENABLE_RESOLVER
void TcpSocket::OnResolved(int id,ipaddr_t a,port_t port)
{
DEB(	fprintf(stderr, "TcpSocket::OnResolved id %d addr %x port %d\n", id, a, port);)
	if (id == m_resolver_id)
	{
		if (a && port)
		{
			Ipv4Address ad(a, port);
			Ipv4Address local;
			if (Open(ad, local))
			{
				if (!Handler().Valid(this))
				{
					Handler().Add(this);
				}
			}
		}
		else
		{
			Handler().LogError(this, "OnResolved", 0, "Resolver failed", LOG_LEVEL_FATAL);
			SetCloseAndDelete();
		}
	}
	else
	{
		Handler().LogError(this, "OnResolved", id, "Resolver returned wrong job id", LOG_LEVEL_FATAL);
		SetCloseAndDelete();
	}
}


#ifdef ENABLE_IPV6
void TcpSocket::OnResolved(int id,in6_addr& a,port_t port)
{
	if (id == m_resolver_id)
	{
		Ipv6Address ad(a, port);
		if (ad.IsValid())
		{
			Ipv6Address local;
			if (Open(ad, local))
			{
				if (!Handler().Valid(this))
				{
					Handler().Add(this);
				}
			}
		}
	}
	else
	{
		Handler().LogError(this, "OnResolved", id, "Resolver returned wrong job id", LOG_LEVEL_FATAL);
		SetCloseAndDelete();
	}
}
#endif
#endif


void TcpSocket::OnRead()
{
	int n = 0;
#ifdef SOCKETS_DYNAMIC_TEMP
	char *buf = m_buf;
#else
	char buf[TCP_BUFSIZE_READ];
#endif
#ifdef HAVE_OPENSSL
	if (IsSSL())
	{
		if (!Ready())
			return;
		n = SSL_read(m_ssl, buf, TCP_BUFSIZE_READ);
		if (n == -1)
		{
			n = SSL_get_error(m_ssl, n);
			switch (n)
			{
			case SSL_ERROR_NONE:
			case SSL_ERROR_WANT_READ:
			case SSL_ERROR_WANT_WRITE:
				break;
			case SSL_ERROR_ZERO_RETURN:
DEB(				fprintf(stderr, "SSL_read() returns zero - closing socket\n");)
				OnDisconnect();
				SetCloseAndDelete(true);
				SetFlushBeforeClose(false);
#ifdef ENABLE_POOL
				SetLost();
#endif
				break;
			default:
DEB(				fprintf(stderr, "SSL read problem, errcode = %d\n",n);)
				OnDisconnect();
				SetCloseAndDelete(true);
				SetFlushBeforeClose(false);
#ifdef ENABLE_POOL
				SetLost();
#endif
			}
			return;
		}
		else
		if (!n)
		{
			OnDisconnect();
			SetCloseAndDelete(true);
			SetFlushBeforeClose(false);
#ifdef ENABLE_POOL
			SetLost();
#endif
			SetShutdown(SHUT_WR);
			return;
		}
		else
		if (n > 0 && n <= TCP_BUFSIZE_READ)
		{
			m_bytes_received += n;
			if (GetTrafficMonitor())
			{
				GetTrafficMonitor() -> fwrite(buf, 1, n);
			}
			if (!m_b_input_buffer_disabled && !ibuf.Write(buf,n))
			{
				Handler().LogError(this, "OnRead(ssl)", 0, "ibuf overflow", LOG_LEVEL_WARNING);
			}
		}
		else
		{
			Handler().LogError(this, "OnRead(ssl)", n, "abnormal value from SSL_read", LOG_LEVEL_ERROR);
		}
	}
	else
#endif // HAVE_OPENSSL
	{
		n = recv(GetSocket(), buf, TCP_BUFSIZE_READ, MSG_NOSIGNAL);
		if (n == -1)
		{
			Handler().LogError(this, "read", Errno, StrError(Errno), LOG_LEVEL_FATAL);
			OnDisconnect();
			SetCloseAndDelete(true);
			SetFlushBeforeClose(false);
#ifdef ENABLE_POOL
			SetLost();
#endif
			return;
		}
		else
		if (!n)
		{
			OnDisconnect();
			SetCloseAndDelete(true);
			SetFlushBeforeClose(false);
#ifdef ENABLE_POOL
			SetLost();
#endif
			SetShutdown(SHUT_WR);
			return;
		}
		else
		if (n > 0 && n <= TCP_BUFSIZE_READ)
		{
			m_bytes_received += n;
			if (GetTrafficMonitor())
			{
				GetTrafficMonitor() -> fwrite(buf, 1, n);
			}
			if (!m_b_input_buffer_disabled && !ibuf.Write(buf,n))
			{
				Handler().LogError(this, "OnRead", 0, "ibuf overflow", LOG_LEVEL_WARNING);
			}
		}
		else
		{
			Handler().LogError(this, "OnRead", n, "abnormal value from recv", LOG_LEVEL_ERROR);
		}
	}
	//
	OnRead( buf, n );
}


void TcpSocket::OnRead( char *buf, size_t n )
{
	// unbuffered
	if (n > 0 && n <= TCP_BUFSIZE_READ)
	{
		if (LineProtocol())
		{
			buf[n] = 0;
			size_t i = 0;
			if (m_skip_c && (buf[i] == 13 || buf[i] == 10) && buf[i] != m_c)
			{
				m_skip_c = false;
				i++;
			}
			size_t x = i;
			for (; i < n && LineProtocol(); i++)
			{
				while ((buf[i] == 13 || buf[i] == 10) && LineProtocol())
				{
					char c = buf[i];
					buf[i] = 0;
					if (buf[x])
					{
						m_line += (buf + x);
					}
					OnLine( m_line );
					i++;
					m_skip_c = true;
					m_c = c;
					if (i < n && (buf[i] == 13 || buf[i] == 10) && buf[i] != c)
					{
						m_skip_c = false;
						i++;
					}
					x = i;
					m_line = "";
				}
				if (!LineProtocol())
				{
					break;
				}
			}
			if (!LineProtocol())
			{
				if (i < n)
				{
					OnRawData(buf + i, n - i);
				}
			}
			else
			if (buf[x])
			{
				m_line += (buf + x);
			}
		}
		else
		{
			OnRawData(buf, n);
		}
	}
	if (m_b_input_buffer_disabled)
	{
		return;
	}
	// further processing: socks4
#ifdef ENABLE_SOCKS4
	if (Socks4())
	{
		bool need_more = false;
		while (GetInputLength() && !need_more && !CloseAndDelete())
		{
			need_more = OnSocks4Read();
		}
	}
#endif
}


void TcpSocket::OnWriteComplete()
{
}


void TcpSocket::OnWrite()
{
	if (Connecting())
	{
		int err = SoError();

		// don't reset connecting flag on error here, we want the OnConnectFailed timeout later on
		if (!err) // ok
		{
			Set(!IsDisableRead(), false);
			SetConnecting(false);
			SetCallOnConnect();
			return;
		}
		Handler().LogError(this, "tcp: connect failed", err, StrError(err), LOG_LEVEL_FATAL);
		Set(false, false); // no more monitoring because connection failed

		// failed
#ifdef ENABLE_SOCKS4
		if (Socks4())
		{
			// %! leave 'Connecting' flag set?
			OnSocks4ConnectFailed();
			return;
		}
#endif
		if (GetConnectionRetry() == -1 ||
			(GetConnectionRetry() && GetConnectionRetries() < GetConnectionRetry()) )
		{
			// even though the connection failed at once, only retry after
			// the connection timeout.
			// should we even try to connect again, when CheckConnect returns
			// false it's because of a connection error - not a timeout...
			return;
		}
		SetConnecting(false);
		SetCloseAndDelete( true );
		/// \todo state reason why connect failed
		OnConnectFailed();
		return;
	}
	// try send next block in buffer
	// if full block is sent, repeat
	// if all blocks are sent, reset m_wfds

	bool repeat = false;
	size_t sz = m_transfer_limit ? GetOutputLength() : 0;
	do
	{
		output_l::iterator it = m_obuf.begin();
		OUTPUT *p = *it;
		repeat = false;
		int n = TryWrite(p -> Buf(), p -> Len());
		if (n > 0)
		{
			size_t left = p -> Remove(n);
			m_output_length -= n;
			if (!left)
			{
				delete p;
				m_obuf.erase(it);
				if (!m_obuf.size())
				{
					m_obuf_top = NULL;
					OnWriteComplete();
				}
				else
				{
					repeat = true;
				}
			}
		}
	} while (repeat);

	if (m_transfer_limit && sz > m_transfer_limit && GetOutputLength() < m_transfer_limit)
	{
		OnTransferLimit();
	}

	// check output buffer set, set/reset m_wfds accordingly
	{
		bool br;
		bool bw;
		bool bx;
		Handler().Get(GetSocket(), br, bw, bx);
		if (m_obuf.size())
			Set(br, true);
		else
			Set(br, false);
	}
}


int TcpSocket::TryWrite(const char *buf, size_t len)
{
	int n = 0;
#ifdef HAVE_OPENSSL
	if (IsSSL())
	{
		n = SSL_write(m_ssl, buf, (int)len);
		if (n == -1)
		{
			int errnr = SSL_get_error(m_ssl, n);
			if ( errnr != SSL_ERROR_WANT_READ && errnr != SSL_ERROR_WANT_WRITE )
			{
				OnDisconnect();
				SetCloseAndDelete(true);
				SetFlushBeforeClose(false);
#ifdef ENABLE_POOL
				SetLost();
#endif
				const char *errbuf = ERR_error_string(errnr, NULL);
				Handler().LogError(this, "OnWrite/SSL_write", errnr, errbuf, LOG_LEVEL_FATAL);
			}
			return 0;
		}
		else
		if (!n)
		{
			OnDisconnect();
			SetCloseAndDelete(true);
			SetFlushBeforeClose(false);
#ifdef ENABLE_POOL
			SetLost();
#endif
DEB(			int errnr = SSL_get_error(m_ssl, n);
			const char *errbuf = ERR_error_string(errnr, NULL);
			fprintf(stderr, "SSL_write() returns 0: %d : %s\n",errnr, errbuf);)
		}
	}
	else
#endif // HAVE_OPENSSL
	{
		n = send(GetSocket(), buf, (int)len, MSG_NOSIGNAL);
		if (n == -1)
		{
		// normal error codes:
		// WSAEWOULDBLOCK
		//       EAGAIN or EWOULDBLOCK
#ifdef _WIN32
			if (Errno != WSAEWOULDBLOCK)
#else
			if (Errno != EWOULDBLOCK)
#endif
			{	
				Handler().LogError(this, "send", Errno, StrError(Errno), LOG_LEVEL_FATAL);
				OnDisconnect();
				SetCloseAndDelete(true);
				SetFlushBeforeClose(false);
#ifdef ENABLE_POOL
				SetLost();
#endif
			}
			return 0;
		}
	}
	if (n > 0)
	{
		m_bytes_sent += n;
		if (GetTrafficMonitor())
		{
			GetTrafficMonitor() -> fwrite(buf, 1, n);
		}
	}
	return n;
}


void TcpSocket::Buffer(const char *buf, size_t len)
{
	size_t ptr = 0;
	m_output_length += len;
	while (ptr < len)
	{
		// buf/len => pbuf/sz
		size_t space = 0;
		if (m_obuf_top && (space = m_obuf_top -> Space()) > 0)
		{
			const char *pbuf = buf + ptr;
			size_t sz = len - ptr;
			if (space >= sz)
			{
				m_obuf_top -> Add(pbuf, sz);
				ptr += sz;
			}
			else
			{
				m_obuf_top -> Add(pbuf, space);
				ptr += space;
			}
		}
		else
		{
			m_obuf_top = new OUTPUT;
			m_obuf.push_back( m_obuf_top );
		}
	}
}


void TcpSocket::Send(const std::string &str,int i)
{
	SendBuf(str.c_str(),str.size(),i);
}


void TcpSocket::SendBuf(const char *buf,size_t len,int)
{
	if (!Ready() && !Connecting())
	{
		Handler().LogError(this, "SendBuf", -1, "Attempt to write to a non-ready socket" ); // warning
		if (GetSocket() == INVALID_SOCKET)
			Handler().LogError(this, "SendBuf", 0, " * GetSocket() == INVALID_SOCKET", LOG_LEVEL_INFO);
		if (Connecting())
			Handler().LogError(this, "SendBuf", 0, " * Connecting()", LOG_LEVEL_INFO);
		if (CloseAndDelete())
			Handler().LogError(this, "SendBuf", 0, " * CloseAndDelete()", LOG_LEVEL_INFO);
		return;
	}
	if (!IsConnected())
	{
		Handler().LogError(this, "SendBuf", -1, "Attempt to write to a non-connected socket, will be sent on connect" ); // warning
		Buffer(buf, len);
		return;
	}
	if (m_obuf_top)
	{
		Buffer(buf, len);
		return;
	}
	int n = TryWrite(buf, len);
	if (n >= 0 && n < (int)len)
	{
		Buffer(buf + n, len - n);
	}
	// if ( data in buffer || !IsConnected )
	// {
	//   add to buffer
	// }
	// else
	// try_send
	// if any data is unsent, buffer it and set m_wfds

	// check output buffer set, set/reset m_wfds accordingly
	{
		bool br;
		bool bw;
		bool bx;
		Handler().Get(GetSocket(), br, bw, bx);
		if (m_obuf.size())
			Set(br, true);
		else
			Set(br, false);
	}
}


void TcpSocket::OnLine(const std::string& )
{
}


#ifdef _MSC_VER
#pragma warning(disable:4355)
#endif
TcpSocket::TcpSocket(const TcpSocket& s)
:StreamSocket(s)
,ibuf(0)
{
}
#ifdef _MSC_VER
#pragma warning(default:4355)
#endif


#ifdef ENABLE_SOCKS4
void TcpSocket::OnSocks4Connect()
{
	char request[1000];
	memset(request, 0, sizeof(request));
	request[0] = 4; // socks v4
	request[1] = 1; // command code: CONNECT
	{
		std::auto_ptr<SocketAddress> ad = GetClientRemoteAddress();
		if (ad.get())
		{
			struct sockaddr *p0 = (struct sockaddr *)*ad;
			struct sockaddr_in *p = (struct sockaddr_in *)p0;
			if (p -> sin_family == AF_INET)
			{
				memcpy(request + 2, &p -> sin_port, 2); // nwbo is ok here
				memcpy(request + 4, &p -> sin_addr, sizeof(struct in_addr));
			}
			else
			{
				/// \todo warn
			}
		}
		else
		{
			/// \todo warn
		}
	}
	strcpy(request + 8, GetSocks4Userid().c_str());
	size_t length = GetSocks4Userid().size() + 8 + 1;
	SendBuf(request, length);
	m_socks4_state = 0;
}


void TcpSocket::OnSocks4ConnectFailed()
{
	Handler().LogError(this,"OnSocks4ConnectFailed",0,"connection to socks4 server failed, trying direct connection",LOG_LEVEL_WARNING);
	if (!Handler().Socks4TryDirect())
	{
		SetConnecting(false);
		SetCloseAndDelete();
		OnConnectFailed(); // just in case
	}
	else
	{
		SetRetryClientConnect();
	}
}


bool TcpSocket::OnSocks4Read()
{
	switch (m_socks4_state)
	{
	case 0:
		ibuf.Read(&m_socks4_vn, 1);
		m_socks4_state = 1;
		break;
	case 1:
		ibuf.Read(&m_socks4_cd, 1);
		m_socks4_state = 2;
		break;
	case 2:
		if (GetInputLength() > 1)
		{
			ibuf.Read( (char *)&m_socks4_dstport, 2);
			m_socks4_state = 3;
		}
		else
		{
			return true;
		}
		break;
	case 3:
		if (GetInputLength() > 3)
		{
			ibuf.Read( (char *)&m_socks4_dstip, 4);
			SetSocks4(false);
			
			switch (m_socks4_cd)
			{
			case 90:
				OnConnect();
				Handler().LogError(this, "OnSocks4Read", 0, "Connection established", LOG_LEVEL_INFO);
				break;
			case 91:
			case 92:
			case 93:
				Handler().LogError(this,"OnSocks4Read",m_socks4_cd,"socks4 server reports connect failed",LOG_LEVEL_FATAL);
				SetConnecting(false);
				SetCloseAndDelete();
				OnConnectFailed();
				break;
			default:
				Handler().LogError(this,"OnSocks4Read",m_socks4_cd,"socks4 server unrecognized response",LOG_LEVEL_FATAL);
				SetCloseAndDelete();
				break;
			}
		}
		else
		{
			return true;
		}
		break;
	}
	return false;
}
#endif


void TcpSocket::Sendf(const char *format, ...)
{
	va_list ap;
	va_start(ap, format);
	char slask[5000]; // vsprintf / vsnprintf temporary
#ifdef _WIN32
	vsprintf(slask, format, ap);
#else
	vsnprintf(slask, 5000, format, ap);
#endif
	va_end(ap);
	Send( slask );
}


#ifdef HAVE_OPENSSL
void TcpSocket::OnSSLConnect()
{
	SetNonblocking(true);
	{
		if (m_ssl_ctx)
		{
DEB(			fprintf(stderr, "SSL Context already initialized - closing socket\n");)
			SetCloseAndDelete(true);
			return;
		}
		InitSSLClient();
	}
	if (m_ssl_ctx)
	{
		/* Connect the SSL socket */
		m_ssl = SSL_new(m_ssl_ctx);
		if (!m_ssl)
		{
DEB(			fprintf(stderr, " m_ssl is NULL\n");)
			SetCloseAndDelete(true);
			return;
		}
		SSL_set_mode(m_ssl, SSL_MODE_AUTO_RETRY);
		m_sbio = BIO_new_socket((int)GetSocket(), BIO_NOCLOSE);
		if (!m_sbio)
		{
DEB(			fprintf(stderr, " m_sbio is NULL\n");)
			SetCloseAndDelete(true);
			return;
		}
		SSL_set_bio(m_ssl, m_sbio, m_sbio);
		if (!SSLNegotiate())
		{
			SetSSLNegotiate();
		}
	}
	else
	{
		SetCloseAndDelete();
	}
}


void TcpSocket::OnSSLAccept()
{
	SetNonblocking(true);
	{
		if (m_ssl_ctx)
		{
DEB(			fprintf(stderr, "SSL Context already initialized - closing socket\n");)
			SetCloseAndDelete(true);
			return;
		}
		InitSSLServer();
		SetSSLServer();
	}
	if (m_ssl_ctx)
	{
		m_ssl = SSL_new(m_ssl_ctx);
		if (!m_ssl)
		{
DEB(			fprintf(stderr, " m_ssl is NULL\n");)
			SetCloseAndDelete(true);
			return;
		}
		SSL_set_mode(m_ssl, SSL_MODE_AUTO_RETRY);
		m_sbio = BIO_new_socket((int)GetSocket(), BIO_NOCLOSE);
		if (!m_sbio)
		{
DEB(			fprintf(stderr, " m_sbio is NULL\n");)
			SetCloseAndDelete(true);
			return;
		}
		SSL_set_bio(m_ssl, m_sbio, m_sbio);
//		if (!SSLNegotiate())
		{
			SetSSLNegotiate();
		}
	}
}


bool TcpSocket::SSLNegotiate()
{
	if (!IsSSLServer()) // client
	{
		int r = SSL_connect(m_ssl);
		if (r > 0)
		{
			SetSSLNegotiate(false);
			/// \todo: resurrect certificate check... client
//			CheckCertificateChain( "");//ServerHOST);
			SetNonblocking(false);
			//
			{
				SetConnected();
				if (GetOutputLength())
				{
					OnWrite();
				}
			}
#ifdef ENABLE_RECONNECT
			if (IsReconnect())
				OnReconnect();
			else
#endif
			{
				OnConnect();
			}
			Handler().LogError(this, "SSLNegotiate/SSL_connect", 0, "Connection established", LOG_LEVEL_INFO);
			return true;
		}
		else
		if (!r)
		{
			Handler().LogError(this, "SSLNegotiate/SSL_connect", 0, "Connection failed", LOG_LEVEL_INFO);
			SetSSLNegotiate(false);
			SetCloseAndDelete();
			OnSSLConnectFailed();
		}
		else
		{
			r = SSL_get_error(m_ssl, r);
			if (r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE)
			{
				Handler().LogError(this, "SSLNegotiate/SSL_connect", -1, "Connection failed", LOG_LEVEL_INFO);
DEB(				fprintf(stderr, "SSL_connect() failed - closing socket, return code: %d\n",r);)
				SetSSLNegotiate(false);
				SetCloseAndDelete(true);
				OnSSLConnectFailed();
			}
		}
	}
	else // server
	{
		int r = SSL_accept(m_ssl);
		if (r > 0)
		{
			SetSSLNegotiate(false);
			/// \todo: resurrect certificate check... server
//			CheckCertificateChain( "");//ClientHOST);
			SetNonblocking(false);
			//
			{
				SetConnected();
				if (GetOutputLength())
				{
					OnWrite();
				}
			}
			OnAccept();
			Handler().LogError(this, "SSLNegotiate/SSL_accept", 0, "Connection established", LOG_LEVEL_INFO);
			return true;
		}
		else
		if (!r)
		{
			Handler().LogError(this, "SSLNegotiate/SSL_accept", 0, "Connection failed", LOG_LEVEL_INFO);
			SetSSLNegotiate(false);
			SetCloseAndDelete();
			OnSSLAcceptFailed();
		}
		else
		{
			r = SSL_get_error(m_ssl, r);
			if (r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE)
			{
				Handler().LogError(this, "SSLNegotiate/SSL_accept", -1, "Connection failed", LOG_LEVEL_INFO);
DEB(				fprintf(stderr, "SSL_accept() failed - closing socket, return code: %d\n",r);)
				SetSSLNegotiate(false);
				SetCloseAndDelete(true);
				OnSSLAcceptFailed();
			}
		}
	}
	return false;
}


void TcpSocket::InitSSLClient()
{
	InitializeContext("", SSLv23_method());
}


void TcpSocket::InitSSLServer()
{
	Handler().LogError(this, "InitSSLServer", 0, "You MUST implement your own InitSSLServer method", LOG_LEVEL_FATAL);
	SetCloseAndDelete();
}


void TcpSocket::InitializeContext(const std::string& context, SSL_METHOD *meth_in)
{
	/* Create our context*/
	static std::map<std::string, SSL_CTX *> client_contexts;
	if (client_contexts.find(context) == client_contexts.end())
	{
		SSL_METHOD *meth = meth_in ? meth_in : SSLv3_method();
		m_ssl_ctx = client_contexts[context] = SSL_CTX_new(meth);
		SSL_CTX_set_mode(m_ssl_ctx, SSL_MODE_AUTO_RETRY);
	}
	else
	{
		m_ssl_ctx = client_contexts[context];
	}
}


void TcpSocket::InitializeContext(const std::string& context,const std::string& keyfile,const std::string& password,SSL_METHOD *meth_in)
{
	/* Create our context*/
	static std::map<std::string, SSL_CTX *> server_contexts;
	if (server_contexts.find(context) == server_contexts.end())
	{
		SSL_METHOD *meth = meth_in ? meth_in : SSLv3_method();
		m_ssl_ctx = server_contexts[context] = SSL_CTX_new(meth);
		SSL_CTX_set_mode(m_ssl_ctx, SSL_MODE_AUTO_RETRY);
		// session id
		if (context.size())
			SSL_CTX_set_session_id_context(m_ssl_ctx, (const unsigned char *)context.c_str(), (unsigned int)context.size());
		else
			SSL_CTX_set_session_id_context(m_ssl_ctx, (const unsigned char *)"--empty--", 9);
	}
	else
	{
		m_ssl_ctx = server_contexts[context];
	}

	/* Load our keys and certificates*/
	if (!(SSL_CTX_use_certificate_file(m_ssl_ctx, keyfile.c_str(), SSL_FILETYPE_PEM)))
	{
		Handler().LogError(this, "TcpSocket InitializeContext", 0, "Couldn't read certificate file " + keyfile, LOG_LEVEL_FATAL);
	}

	m_password = password;
	SSL_CTX_set_default_passwd_cb(m_ssl_ctx, SSL_password_cb);
	SSL_CTX_set_default_passwd_cb_userdata(m_ssl_ctx, this);
	if (!(SSL_CTX_use_PrivateKey_file(m_ssl_ctx, keyfile.c_str(), SSL_FILETYPE_PEM)))
	{
		Handler().LogError(this, "TcpSocket InitializeContext", 0, "Couldn't read private key file " + keyfile, LOG_LEVEL_FATAL);
	}
}


void TcpSocket::InitializeContext(const std::string& context,const std::string& certfile,const std::string& keyfile,const std::string& password,SSL_METHOD *meth_in)
{
	/* Create our context*/
	static std::map<std::string, SSL_CTX *> server_contexts;
	if (server_contexts.find(context) == server_contexts.end())
	{
		SSL_METHOD *meth = meth_in ? meth_in : SSLv3_method();
		m_ssl_ctx = server_contexts[context] = SSL_CTX_new(meth);
		SSL_CTX_set_mode(m_ssl_ctx, SSL_MODE_AUTO_RETRY);
		// session id
		if (context.size())
			SSL_CTX_set_session_id_context(m_ssl_ctx, (const unsigned char *)context.c_str(), (unsigned int)context.size());
		else
			SSL_CTX_set_session_id_context(m_ssl_ctx, (const unsigned char *)"--empty--", 9);
	}
	else
	{
		m_ssl_ctx = server_contexts[context];
	}

	/* Load our keys and certificates*/
	if (!(SSL_CTX_use_certificate_file(m_ssl_ctx, certfile.c_str(), SSL_FILETYPE_PEM)))
	{
		Handler().LogError(this, "TcpSocket InitializeContext", 0, "Couldn't read certificate file " + keyfile, LOG_LEVEL_FATAL);
	}

	m_password = password;
	SSL_CTX_set_default_passwd_cb(m_ssl_ctx, SSL_password_cb);
	SSL_CTX_set_default_passwd_cb_userdata(m_ssl_ctx, this);
	if (!(SSL_CTX_use_PrivateKey_file(m_ssl_ctx, keyfile.c_str(), SSL_FILETYPE_PEM)))
	{
		Handler().LogError(this, "TcpSocket InitializeContext", 0, "Couldn't read private key file " + keyfile, LOG_LEVEL_FATAL);
	}
}


int TcpSocket::SSL_password_cb(char *buf,int num,int rwflag,void *userdata)
{
	Socket *p0 = static_cast<Socket *>(userdata);
	TcpSocket *p = dynamic_cast<TcpSocket *>(p0);
	std::string pw = p ? p -> GetPassword() : "";
	if ( (size_t)num < pw.size() + 1)
	{
		return 0;
	}
	strcpy(buf,pw.c_str());
	return (int)pw.size();
}
#endif // HAVE_OPENSSL


int TcpSocket::Close()
{
	if (GetSocket() == INVALID_SOCKET) // this could happen
	{
		Handler().LogError(this, "Socket::Close", 0, "file descriptor invalid", LOG_LEVEL_WARNING);
		return 0;
	}
	int n;
	SetNonblocking(true);
	if (IsConnected() && !(GetShutdown() & SHUT_WR))
	{
		if (shutdown(GetSocket(), SHUT_WR) == -1)
		{
			// failed...
			Handler().LogError(this, "shutdown", Errno, StrError(Errno), LOG_LEVEL_ERROR);
		}
	}
	//
	char tmp[1000];
	if ((n = recv(GetSocket(),tmp,1000,0)) >= 0)
	{
		if (n)
		{
			Handler().LogError(this, "read() after shutdown", n, "bytes read", LOG_LEVEL_WARNING);
		}
	}
#ifdef HAVE_OPENSSL
	if (IsSSL() && m_ssl)
		SSL_shutdown(m_ssl);
	if (m_ssl)
	{
		SSL_free(m_ssl);
		m_ssl = NULL;
	}
#endif
	return Socket::Close();
}


#ifdef HAVE_OPENSSL
SSL_CTX *TcpSocket::GetSslContext()
{
	if (!m_ssl_ctx)
		Handler().LogError(this, "GetSslContext", 0, "SSL Context is NULL; check InitSSLServer/InitSSLClient", LOG_LEVEL_WARNING);
	return m_ssl_ctx;
}

SSL *TcpSocket::GetSsl()
{
	if (!m_ssl)
		Handler().LogError(this, "GetSsl", 0, "SSL is NULL; check InitSSLServer/InitSSLClient", LOG_LEVEL_WARNING);
	return m_ssl;
}
#endif


#ifdef ENABLE_RECONNECT
void TcpSocket::SetReconnect(bool x)
{
	m_b_reconnect = x;
}
#endif


void TcpSocket::OnRawData(const char *buf_in,size_t len)
{
}


size_t TcpSocket::GetInputLength()
{
	return ibuf.GetLength();
}


size_t TcpSocket::GetOutputLength()
{
	return m_output_length;
}


uint64_t TcpSocket::GetBytesReceived(bool clear)
{
	uint64_t z = m_bytes_received;
	if (clear)
		m_bytes_received = 0;
	return z;
}


uint64_t TcpSocket::GetBytesSent(bool clear)
{
	uint64_t z = m_bytes_sent;
	if (clear)
		m_bytes_sent = 0;
	return z;
}


#ifdef ENABLE_RECONNECT
bool TcpSocket::Reconnect()
{
	return m_b_reconnect;
}


void TcpSocket::SetIsReconnect(bool x)
{
	m_b_is_reconnect = x;
}


bool TcpSocket::IsReconnect()
{
	return m_b_is_reconnect;
}
#endif


#ifdef HAVE_OPENSSL
const std::string& TcpSocket::GetPassword()
{
	return m_password;
}
#endif


void TcpSocket::DisableInputBuffer(bool x)
{
	m_b_input_buffer_disabled = x;
}


void TcpSocket::OnOptions(int family,int type,int protocol,SOCKET s)
{
DEB(	fprintf(stderr, "Socket::OnOptions()\n");)
#ifdef SO_NOSIGPIPE
	SetSoNosigpipe(true);
#endif
	SetSoReuseaddr(true);
	SetSoKeepalive(true);
}


void TcpSocket::SetLineProtocol(bool x)
{
	StreamSocket::SetLineProtocol(x);
	DisableInputBuffer(x);
}


bool TcpSocket::SetTcpNodelay(bool x)
{
#ifdef TCP_NODELAY
	int optval = x ? 1 : 0;
	if (setsockopt(GetSocket(), IPPROTO_TCP, TCP_NODELAY, (char *)&optval, sizeof(optval)) == -1)
	{
		Handler().LogError(this, "setsockopt(IPPROTO_TCP, TCP_NODELAY)", Errno, StrError(Errno), LOG_LEVEL_FATAL);
		return false;
	}
	return true;
#else
	Handler().LogError(this, "socket option not available", 0, "TCP_NODELAY", LOG_LEVEL_INFO);
	return false;
#endif
}


TcpSocket::CircularBuffer::CircularBuffer(size_t size)
:buf(new char[2 * size])
,m_max(size)
,m_q(0)
,m_b(0)
,m_t(0)
,m_count(0)
{
}


TcpSocket::CircularBuffer::~CircularBuffer()
{
	delete[] buf;
}


bool TcpSocket::CircularBuffer::Write(const char *s,size_t l)
{
	if (m_q + l > m_max)
	{
		return false; // overflow
	}
	m_count += (unsigned long)l;
	if (m_t + l > m_max) // block crosses circular border
	{
		size_t l1 = m_max - m_t; // size left until circular border crossing
		// always copy full block to buffer(buf) + top pointer(m_t)
		// because we have doubled the buffer size for performance reasons
		memcpy(buf + m_t, s, l);
		memcpy(buf, s + l1, l - l1);
		m_t = l - l1;
		m_q += l;
	}
	else
	{
		memcpy(buf + m_t, s, l);
		memcpy(buf + m_max + m_t, s, l);
		m_t += l;
		if (m_t >= m_max)
			m_t -= m_max;
		m_q += l;
	}
	return true;
}


bool TcpSocket::CircularBuffer::Read(char *s,size_t l)
{
	if (l > m_q)
	{
		return false; // not enough chars
	}
	if (m_b + l > m_max) // block crosses circular border
	{
		size_t l1 = m_max - m_b;
		if (s)
		{
			memcpy(s, buf + m_b, l1);
			memcpy(s + l1, buf, l - l1);
		}
		m_b = l - l1;
		m_q -= l;
	}
	else
	{
		if (s)
		{
			memcpy(s, buf + m_b, l);
		}
		m_b += l;
		if (m_b >= m_max)
			m_b -= m_max;
		m_q -= l;
	}
	if (!m_q)
	{
		m_b = m_t = 0;
	}
	return true;
}


bool TcpSocket::CircularBuffer::Remove(size_t l)
{
	return Read(NULL, l);
}


size_t TcpSocket::CircularBuffer::GetLength()
{
	return m_q;
}


const char *TcpSocket::CircularBuffer::GetStart()
{
	return buf + m_b;
}


size_t TcpSocket::CircularBuffer::GetL()
{
	return (m_b + m_q > m_max) ? m_max - m_b : m_q;
}


size_t TcpSocket::CircularBuffer::Space()
{
	return m_max - m_q;
}


unsigned long TcpSocket::CircularBuffer::ByteCounter(bool clear)
{
	if (clear)
	{
		unsigned long x = m_count;
		m_count = 0;
		return x;
	}
	return m_count;
}


std::string TcpSocket::CircularBuffer::ReadString(size_t l)
{
	char *sz = new char[l + 1];
	if (!Read(sz, l)) // failed, debug printout in Read() method
	{
		delete[] sz;
		return "";
	}
	sz[l] = 0;
	std::string tmp = sz;
	delete[] sz;
	return tmp;
}


void TcpSocket::OnConnectTimeout()
{
	Handler().LogError(this, "connect", -1, "connect timeout", LOG_LEVEL_FATAL);
#ifdef ENABLE_SOCKS4
	if (Socks4())
	{
		OnSocks4ConnectFailed();
		// retry direct connection
	}
	else
#endif
	if (GetConnectionRetry() == -1 ||
		(GetConnectionRetry() && GetConnectionRetries() < GetConnectionRetry()) )
	{
		IncreaseConnectionRetries();
		// ask socket via OnConnectRetry callback if we should continue trying
		if (OnConnectRetry())
		{
			SetRetryClientConnect();
		}
		else
		{
			SetCloseAndDelete( true );
			/// \todo state reason why connect failed
			OnConnectFailed();
		}
	}
	else
	{
		SetCloseAndDelete(true);
		/// \todo state reason why connect failed
		OnConnectFailed();
	}
	//
	SetConnecting(false);
}


#ifdef _WIN32
void TcpSocket::OnException()
{
	if (Connecting())
	{
#ifdef ENABLE_SOCKS4
		if (Socks4())
			OnSocks4ConnectFailed();
		else
#endif
		if (GetConnectionRetry() == -1 ||
			(GetConnectionRetry() &&
			 GetConnectionRetries() < GetConnectionRetry() ))
		{
			// even though the connection failed at once, only retry after
			// the connection timeout
			// should we even try to connect again, when CheckConnect returns
			// false it's because of a connection error - not a timeout...
		}
		else
		{
			SetConnecting(false); // tnx snibbe
			SetCloseAndDelete();
			OnConnectFailed();
		}
		return;
	}
	// %! exception doesn't always mean something bad happened, this code should be reworked
	// errno valid here?
	int err = SoError();
	Handler().LogError(this, "exception on select", err, StrError(err), LOG_LEVEL_FATAL);
	SetCloseAndDelete();
}
#endif // _WIN32


int TcpSocket::Protocol()
{
	return IPPROTO_TCP;
}


void TcpSocket::SetTransferLimit(size_t sz)
{
	m_transfer_limit = sz;
}


void TcpSocket::OnTransferLimit()
{
}


#ifdef SOCKETS_NAMESPACE
}
#endif