aboutsummaryrefslogtreecommitdiff
path: root/lib/url.c
blob: ca7f51431c37464377974e7bf839147c8d086446 (plain)
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
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id$
 ***************************************************************************/

/* -- WIN32 approved -- */

#include "setup.h"

#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>

#ifdef WIN32
#include <time.h>
#include <io.h>
#else
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif

#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#ifdef VMS
#include <in.h>
#include <inet.h>
#endif

#ifdef HAVE_SETJMP_H
#include <setjmp.h>
#endif

#ifndef HAVE_SOCKET
#error "We can't compile without socket() support!"
#endif

#endif  /* WIN32 */

#ifdef USE_LIBIDN
#include <idna.h>
#include <tld.h>
#include <stringprep.h>
#ifdef HAVE_IDN_FREE_H
#include <idn-free.h>
#else
void idn_free (void *ptr); /* prototype from idn-free.h, not provided by
                              libidn 0.4.5's make install! */
#endif
#ifndef HAVE_IDN_FREE
/* if idn_free() was not found in this version of libidn, use plain free()
   instead */
#define idn_free(x) (free)(x)
#endif
#endif  /* USE_LIBIDN */

#include "urldata.h"
#include "netrc.h"

#include "formdata.h"
#include "base64.h"
#include "sslgen.h"
#include "hostip.h"
#include "transfer.h"
#include "sendf.h"
#include "progress.h"
#include "cookie.h"
#include "strequal.h"
#include "strerror.h"
#include "escape.h"
#include "strtok.h"
#include "share.h"
#include "content_encoding.h"
#include "http_digest.h"
#include "http_negotiate.h"
#include "select.h"
#include "multiif.h"
#include "easyif.h"

/* And now for the protocols */
#include "ftp.h"
#include "dict.h"
#include "telnet.h"
#include "tftp.h"
#include "http.h"
#include "file.h"
#include "curl_ldap.h"
#include "ssh.h"
#include "url.h"
#include "connect.h"
#include "inet_ntop.h"
#include "http_ntlm.h"
#include "socks.h"
#include <ca-bundle.h>

#if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL)
#include "inet_ntoa_r.h"
#endif

#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>

#include "memory.h"

/* The last #include file should be: */
#include "memdebug.h"

/* Local static prototypes */
static long ConnectionKillOne(struct SessionHandle *data);
static bool ConnectionExists(struct SessionHandle *data,
                             struct connectdata *needle,
                             struct connectdata **usethis);
static long ConnectionStore(struct SessionHandle *data,
                            struct connectdata *conn);
static bool IsPipeliningPossible(struct SessionHandle *handle);
static bool IsPipeliningEnabled(struct SessionHandle *handle);
static void conn_free(struct connectdata *conn);

static void signalPipeClose(struct curl_llist *pipe);

static struct SessionHandle* gethandleathead(struct curl_llist *pipe);

#define MAX_PIPELINE_LENGTH 5

/*
 * We use this ZERO_NULL to avoid picky compiler warnings,
 * when assigning a NULL pointer to a function pointer var.
 */

#define ZERO_NULL 0

#ifndef USE_ARES
/* not for ares builds */

#ifndef WIN32
/* not for WIN32 builds */

#ifdef HAVE_SIGSETJMP
extern sigjmp_buf curl_jmpenv;
#endif

#ifdef SIGALRM
static
RETSIGTYPE alarmfunc(int sig)
{
  /* this is for "-ansi -Wall -pedantic" to stop complaining!   (rabe) */
  (void)sig;
#ifdef HAVE_SIGSETJMP
  siglongjmp(curl_jmpenv, 1);
#endif
  return;
}
#endif /* SIGALRM */
#endif /* WIN32 */
#endif /* USE_ARES */

#ifdef CURL_DISABLE_VERBOSE_STRINGS
#define verboseconnect(x)  do { } while (0)
#endif

void Curl_safefree(void *ptr)
{
  if(ptr)
    free(ptr);
}

static void close_connections(struct SessionHandle *data)
{
  /* Loop through all open connections and kill them one by one */
  while(-1 != ConnectionKillOne(data))
    ; /* empty loop */
}

void Curl_freeset(struct SessionHandle * data)
{
  /* Free all dynamic strings stored in the data->set substructure. */
  enum dupstring i;
  for(i=(enum dupstring)0; i < STRING_LAST; i++)
    Curl_safefree(data->set.str[i]);
}

static CURLcode Curl_setstropt(char **charp, char * s)
{
  /* Release the previous storage at `charp' and replace by a dynamic storage
     copy of `s'. Return CURLE_OK or CURLE_OUT_OF_MEMORY. */

  if (*charp) {
    free(*charp);
    *charp = (char *) NULL;
  }

  if (s) {
    s = strdup(s);

    if (!s)
      return CURLE_OUT_OF_MEMORY;

    *charp = s;
  }

  return CURLE_OK;
}

CURLcode Curl_dupset(struct SessionHandle * dst, struct SessionHandle * src)
{
  CURLcode r = CURLE_OK;
  enum dupstring i;

  /* Copy src->set into dst->set first, then deal with the strings
     afterwards */
  dst->set = src->set;

  /* clear all string pointers first */
  memset(dst->set.str, 0, STRING_LAST * sizeof(char *));

  /* duplicate all strings */
  for(i=(enum dupstring)0; i< STRING_LAST; i++) {
    r = Curl_setstropt(&dst->set.str[i], src->set.str[i]);
    if (r != CURLE_OK)
      break;
  }

  /* If a failure occurred, freeing has to be performed externally. */
  return r;
}

/*
 * This is the internal function curl_easy_cleanup() calls. This should
 * cleanup and free all resources associated with this sessionhandle.
 *
 * NOTE: if we ever add something that attempts to write to a socket or
 * similar here, we must ignore SIGPIPE first. It is currently only done
 * when curl_easy_perform() is invoked.
 */

CURLcode Curl_close(struct SessionHandle *data)
{
  struct Curl_multi *m = data->multi;

#ifdef CURLDEBUG
  /* only for debugging, scan through all connections and see if there's a
     pipe reference still identifying this handle */

  if(data->state.is_in_pipeline)
    fprintf(stderr, "CLOSED when in pipeline!\n");

  if(data->state.connc && data->state.connc->type == CONNCACHE_MULTI) {
    struct conncache *c = data->state.connc;
    int i;
    struct curl_llist *pipe;
    struct curl_llist_element *curr;
    struct connectdata *connptr;

    for(i=0; i< c->num; i++) {
      connptr = c->connects[i];
      if(!connptr)
        continue;

      pipe = connptr->send_pipe;
      if(pipe) {
        for (curr = pipe->head; curr; curr=curr->next) {
          if(data == (struct SessionHandle *) curr->ptr) {
            fprintf(stderr,
                    "MAJOR problem we %p are still in send pipe for %p done %d\n",
                    data, connptr, connptr->bits.done);
          }
        }
      }
      pipe = connptr->recv_pipe;
      if(pipe) {
        for (curr = pipe->head; curr; curr=curr->next) {
          if(data == (struct SessionHandle *) curr->ptr) {
            fprintf(stderr,
                    "MAJOR problem we %p are still in recv pipe for %p done %d\n",
                    data, connptr, connptr->bits.done);
          }
        }
      }
    }
  }
#endif

  if(m)
    /* This handle is still part of a multi handle, take care of this first
       and detach this handle from there. */
    Curl_multi_rmeasy(data->multi, data);

  data->magic = 0; /* force a clear AFTER the possibly enforced removal from
                      the multi handle, since that function uses the magic
                      field! */

  if(data->state.connc) {

    if(data->state.connc->type == CONNCACHE_PRIVATE) {
      /* close all connections still alive that are in the private connection
         cache, as we no longer have the pointer left to the shared one. */
      close_connections(data);

      /* free the connection cache if allocated privately */
      Curl_rm_connc(data->state.connc);
    }
  }

  if(data->state.shared_conn) {
    /* marked to be used by a pending connection so we can't kill this handle
       just yet */
    data->state.closed = TRUE;
    return CURLE_OK;
  }

  if ( ! (data->share && data->share->hostcache) ) {
    if ( !Curl_global_host_cache_use(data)) {
      Curl_hash_destroy(data->dns.hostcache);
    }
  }

  if(data->reqdata.rangestringalloc)
    free(data->reqdata.range);

  /* Free the pathbuffer */
  Curl_safefree(data->reqdata.pathbuffer);
  Curl_safefree(data->reqdata.proto.generic);

  /* Close down all open SSL info and sessions */
  Curl_ssl_close_all(data);
  Curl_safefree(data->state.first_host);
  Curl_safefree(data->state.scratch);

  if(data->change.referer_alloc)
    free(data->change.referer);

  if(data->change.url_alloc)
    free(data->change.url);

  Curl_safefree(data->state.headerbuff);

#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
  Curl_share_lock(data, CURL_LOCK_DATA_COOKIE, CURL_LOCK_ACCESS_SINGLE);
  if(data->set.str[STRING_COOKIEJAR]) {
    if(data->change.cookielist) {
      /* If there is a list of cookie files to read, do it first so that
         we have all the told files read before we write the new jar */
      Curl_cookie_loadfiles(data);
    }

    /* we have a "destination" for all the cookies to get dumped to */
    if(Curl_cookie_output(data->cookies, data->set.str[STRING_COOKIEJAR]))
      infof(data, "WARNING: failed to save cookies in %s\n",
            data->set.str[STRING_COOKIEJAR]);
  }
  else {
    if(data->change.cookielist)
      /* since nothing is written, we can just free the list of cookie file
         names */
      curl_slist_free_all(data->change.cookielist); /* clean up list */
  }

  if( !data->share || (data->cookies != data->share->cookies) ) {
    Curl_cookie_cleanup(data->cookies);
  }
  Curl_share_unlock(data, CURL_LOCK_DATA_COOKIE);
#endif

  Curl_digest_cleanup(data);

  Curl_safefree(data->info.contenttype);

  /* this destroys the channel and we cannot use it anymore after this */
  ares_destroy(data->state.areschannel);

#if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
  /* close iconv conversion descriptors */
  if (data->inbound_cd != (iconv_t)-1) {
     iconv_close(data->inbound_cd);
  }
  if (data->outbound_cd != (iconv_t)-1) {
     iconv_close(data->outbound_cd);
  }
  if (data->utf8_cd != (iconv_t)-1) {
     iconv_close(data->utf8_cd);
  }
#endif /* CURL_DOES_CONVERSIONS && HAVE_ICONV */

  /* No longer a dirty share, if it exists */
  if (data->share) {
    Curl_share_lock(data, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE);
    data->share->dirty--;
    Curl_share_unlock(data, CURL_LOCK_DATA_SHARE);
  }

  Curl_freeset(data);
  free(data);
  return CURLE_OK;
}

/* create a connection cache of a private or multi type */
struct conncache *Curl_mk_connc(int type,
                                long amount) /* set -1 to use default */
{
  /* It is subject for debate how many default connections to have for a multi
     connection cache... */

  struct conncache *c;
  long default_amount;

  if (type == CONNCACHE_PRIVATE) {
    default_amount = (amount < 0) ? 5 : amount;
  }
  else {
    default_amount = (amount < 0) ? 10 : amount;
  }

  c= calloc(sizeof(struct conncache), 1);
  if(!c)
    return NULL;

  if ((size_t)(default_amount) > ((size_t)-1) / sizeof(struct connectdata *))
    default_amount = ((size_t)-1) / sizeof(struct connectdata *);

  c->connects = calloc(sizeof(struct connectdata *), (size_t)default_amount);
  if(!c->connects) {
    free(c);
    return NULL;
  }

  c->num = default_amount;

  return c;
}

/* Change number of entries of a connection cache */
CURLcode Curl_ch_connc(struct SessionHandle *data,
                       struct conncache *c,
                       long newamount)
{
  long i;
  struct connectdata **newptr;

  if(newamount < 1)
    newamount = 1; /* we better have at least one entry */

  if(!c) {
    /* we get a NULL pointer passed in as connection cache, which means that
       there is no cache created for this SessionHandle just yet, we create a
       brand new with the requested size.
    */
    data->state.connc = Curl_mk_connc(CONNCACHE_PRIVATE, newamount);
    if(!data->state.connc)
      return CURLE_OUT_OF_MEMORY;
    return CURLE_OK;
  }

  if(newamount < c->num) {
    /* Since this number is *decreased* from the existing number, we must
       close the possibly open connections that live on the indexes that
       are being removed!

       NOTE: for conncache_multi cases we must make sure that we only
       close handles not in use.
    */
    for(i=newamount; i< c->num; i++)
      Curl_disconnect(c->connects[i]);

    /* If the most recent connection is no longer valid, mark it
       invalid. */
    if(data->state.lastconnect <= newamount)
      data->state.lastconnect = -1;
  }
  if(newamount > 0) {
    newptr= (struct connectdata **)
      realloc(c->connects, sizeof(struct connectdata *) * newamount);
    if(!newptr)
      /* we closed a few connections in vain, but so what? */
      return CURLE_OUT_OF_MEMORY;

    /* nullify the newly added pointers */
    for(i=c->num; i<newamount; i++)
      newptr[i] = NULL;

    c->connects = newptr;
    c->num = newamount;
  }
  /* we no longer support less than 1 as size for the connection cache, and
     I'm not sure it ever worked to set it to zero */
  return CURLE_OK;
}

/* Free a connection cache. This is called from Curl_close() and
   curl_multi_cleanup(). */
void Curl_rm_connc(struct conncache *c)
{
  if(c->connects) {
    int i;
    for(i = 0; i < c->num; ++i)
      conn_free(c->connects[i]);

    free(c->connects);
  }

  free(c);
}

/**
 * Curl_open()
 *
 * @param curl is a pointer to a sessionhandle pointer that gets set by this
 * function.
 * @return CURLcode
 */

CURLcode Curl_open(struct SessionHandle **curl)
{
  CURLcode res = CURLE_OK;
  struct SessionHandle *data;
#ifdef USE_ARES
  int status;
#endif

  /* Very simple start-up: alloc the struct, init it with zeroes and return */
  data = (struct SessionHandle *)calloc(1, sizeof(struct SessionHandle));
  if(!data) {
    /* this is a very serious error */
    DEBUGF(fprintf(stderr, "Error: calloc of SessionHandle failed\n"));
    return CURLE_OUT_OF_MEMORY;
  }

  data->magic = CURLEASY_MAGIC_NUMBER;

#ifdef USE_ARES
  if ((status = ares_init(&data->state.areschannel)) != ARES_SUCCESS) {
    DEBUGF(fprintf(stderr, "Error: ares_init failed\n"));
    free(data);
    if (status == ARES_ENOMEM)
      return CURLE_OUT_OF_MEMORY;
    else
      return CURLE_FAILED_INIT;
  }
  /* make sure that all other returns from this function should destroy the
     ares channel before returning error! */
#endif

  /* We do some initial setup here, all those fields that can't be just 0 */

  data->state.headerbuff=(char*)malloc(HEADERSIZE);
  if(!data->state.headerbuff) {
    DEBUGF(fprintf(stderr, "Error: malloc of headerbuff failed\n"));
    res = CURLE_OUT_OF_MEMORY;
  }
  else {
    data->state.headersize=HEADERSIZE;

    data->set.out = stdout; /* default output to stdout */
    data->set.in  = stdin;  /* default input from stdin */
    data->set.err  = stderr;  /* default stderr to stderr */

    /* use fwrite as default function to store output */
    data->set.fwrite_func = (curl_write_callback)fwrite;

    /* use fread as default function to read input */
    data->set.fread_func = (curl_read_callback)fread;

    /* conversion callbacks for non-ASCII hosts */
    data->set.convfromnetwork = (curl_conv_callback)ZERO_NULL;
    data->set.convtonetwork   = (curl_conv_callback)ZERO_NULL;
    data->set.convfromutf8    = (curl_conv_callback)ZERO_NULL;

#if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
    /* conversion descriptors for iconv calls */
    data->outbound_cd = (iconv_t)-1;
    data->inbound_cd  = (iconv_t)-1;
    data->utf8_cd     = (iconv_t)-1;
#endif /* CURL_DOES_CONVERSIONS && HAVE_ICONV */

    data->set.infilesize = -1; /* we don't know any size */
    data->set.postfieldsize = -1;
    data->set.maxredirs = -1; /* allow any amount by default */
    data->state.current_speed = -1; /* init to negative == impossible */

    data->set.httpreq = HTTPREQ_GET; /* Default HTTP request */
    data->set.ftp_use_epsv = TRUE;   /* FTP defaults to EPSV operations */
    data->set.ftp_use_eprt = TRUE;   /* FTP defaults to EPRT operations */
    data->set.ftp_filemethod = FTPFILE_MULTICWD;
    data->set.dns_cache_timeout = 60; /* Timeout every 60 seconds by default */

    /* make libcurl quiet by default: */
    data->set.hide_progress = TRUE;  /* CURLOPT_NOPROGRESS changes these */
    data->progress.flags |= PGRS_HIDE;

    /* Set the default size of the SSL session ID cache */
    data->set.ssl.numsessions = 5;

    data->set.proxyport = 1080;
    data->set.proxytype = CURLPROXY_HTTP; /* defaults to HTTP proxy */
    data->set.httpauth = CURLAUTH_BASIC;  /* defaults to basic */
    data->set.proxyauth = CURLAUTH_BASIC; /* defaults to basic */

    /* This no longer creates a connection cache here. It is instead made on
       the first call to curl_easy_perform() or when the handle is added to a
       multi stack. */

    data->set.ssh_auth_types = CURLSSH_AUTH_DEFAULT; /* defaults to any auth
                                                        type */
    data->set.new_file_perms = 0644;    /* Default permissions */
    data->set.new_directory_perms = 0755; /* Default permissions */

    /* most recent connection is not yet defined */
    data->state.lastconnect = -1;

    Curl_easy_initHandleData(data);

    /*
     * libcurl 7.10 introduced SSL verification *by default*! This needs to be
     * switched off unless wanted.
     */
    data->set.ssl.verifypeer = TRUE;
    data->set.ssl.verifyhost = 2;
    data->set.ssl.sessionid = TRUE; /* session ID caching enabled by default */
#ifdef CURL_CA_BUNDLE
    /* This is our preferred CA cert bundle since install time */
    res = Curl_setstropt(&data->set.str[STRING_SSL_CAFILE],
                         (char *) CURL_CA_BUNDLE);
#endif
  }

  if(res) {
    ares_destroy(data->state.areschannel);
    if(data->state.headerbuff)
      free(data->state.headerbuff);
    Curl_freeset(data);
    free(data);
    data = NULL;
  }
  else
    *curl = data;

  return res;
}

CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
                     va_list param)
{
  char *argptr;
  CURLcode result = CURLE_OK;

  switch(option) {
  case CURLOPT_DNS_CACHE_TIMEOUT:
    data->set.dns_cache_timeout = va_arg(param, long);
    break;
  case CURLOPT_DNS_USE_GLOBAL_CACHE:
    {
      long use_cache = va_arg(param, long);
      if (use_cache)
        Curl_global_host_cache_init();

      data->set.global_dns_cache = (bool)(0 != use_cache);
    }
    break;
  case CURLOPT_SSL_CIPHER_LIST:
    /* set a list of cipher we want to use in the SSL connection */
    result = Curl_setstropt(&data->set.str[STRING_SSL_CIPHER_LIST],
                            va_arg(param, char *));
    break;

  case CURLOPT_RANDOM_FILE:
    /*
     * This is the path name to a file that contains random data to seed
     * the random SSL stuff with. The file is only used for reading.
     */
    result = Curl_setstropt(&data->set.str[STRING_SSL_RANDOM_FILE],
                            va_arg(param, char *));
    break;
  case CURLOPT_EGDSOCKET:
    /*
     * The Entropy Gathering Daemon socket pathname
     */
    result = Curl_setstropt(&data->set.str[STRING_SSL_EGDSOCKET],
                            va_arg(param, char *));
    break;
  case CURLOPT_MAXCONNECTS:
    /*
     * Set the absolute number of maximum simultaneous alive connection that
     * libcurl is allowed to have.
     */
    result = Curl_ch_connc(data, data->state.connc, va_arg(param, long));
    break;
  case CURLOPT_FORBID_REUSE:
    /*
     * When this transfer is done, it must not be left to be reused by a
     * subsequent transfer but shall be closed immediately.
     */
    data->set.reuse_forbid = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_FRESH_CONNECT:
    /*
     * This transfer shall not use a previously cached connection but
     * should be made with a fresh new connect!
     */
    data->set.reuse_fresh = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_VERBOSE:
    /*
     * Verbose means infof() calls that give a lot of information about
     * the connection and transfer procedures as well as internal choices.
     */
    data->set.verbose = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_HEADER:
    /*
     * Set to include the header in the general data output stream.
     */
    data->set.include_header = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_NOPROGRESS:
    /*
     * Shut off the internal supported progress meter
     */
    data->set.hide_progress = (bool)(0 != va_arg(param, long));
    if(data->set.hide_progress)
      data->progress.flags |= PGRS_HIDE;
    else
      data->progress.flags &= ~PGRS_HIDE;
    break;
  case CURLOPT_NOBODY:
    /*
     * Do not include the body part in the output data stream.
     */
    data->set.opt_no_body = (bool)(0 != va_arg(param, long));
    if(data->set.opt_no_body)
      /* in HTTP lingo, this means using the HEAD request */
      data->set.httpreq = HTTPREQ_HEAD;
    break;
  case CURLOPT_FAILONERROR:
    /*
     * Don't output the >=300 error code HTML-page, but instead only
     * return error.
     */
    data->set.http_fail_on_error = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_UPLOAD:
  case CURLOPT_PUT:
    /*
     * We want to sent data to the remote host. If this is HTTP, that equals
     * using the PUT request.
     */
    data->set.upload = (bool)(0 != va_arg(param, long));
    if(data->set.upload)
      /* If this is HTTP, PUT is what's needed to "upload" */
      data->set.httpreq = HTTPREQ_PUT;
    break;
  case CURLOPT_FILETIME:
    /*
     * Try to get the file time of the remote document. The time will
     * later (possibly) become available using curl_easy_getinfo().
     */
    data->set.get_filetime = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_FTP_CREATE_MISSING_DIRS:
    /*
     * An FTP option that modifies an upload to create missing directories on
     * the server.
     */
    data->set.ftp_create_missing_dirs = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_FTP_RESPONSE_TIMEOUT:
    /*
     * An FTP option that specifies how quickly an FTP response must be
     * obtained before it is considered failure.
     */
    data->set.ftp_response_timeout = va_arg( param , long ) * 1000;
    break;
  case CURLOPT_FTPLISTONLY:
    /*
     * An FTP option that changes the command to one that asks for a list
     * only, no file info details.
     */
    data->set.ftp_list_only = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_FTPAPPEND:
    /*
     * We want to upload and append to an existing (FTP) file.
     */
    data->set.ftp_append = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_FTP_FILEMETHOD:
    /*
     * How do access files over FTP.
     */
    data->set.ftp_filemethod = (curl_ftpfile)va_arg(param, long);
    break;
  case CURLOPT_NETRC:
    /*
     * Parse the $HOME/.netrc file
     */
    data->set.use_netrc = (enum CURL_NETRC_OPTION)va_arg(param, long);
    break;
  case CURLOPT_NETRC_FILE:
    /*
     * Use this file instead of the $HOME/.netrc file
     */
    result = Curl_setstropt(&data->set.str[STRING_NETRC_FILE],
                            va_arg(param, char *));
    break;
  case CURLOPT_TRANSFERTEXT:
    /*
     * This option was previously named 'FTPASCII'. Renamed to work with
     * more protocols than merely FTP.
     *
     * Transfer using ASCII (instead of BINARY).
     */
    data->set.prefer_ascii = (bool)(0 != va_arg(param, long));
    break;
  case CURLOPT_TIMECONDITION:
    /*
     * Set HTTP time condition. This must be one of the defines in the
     * curl/curl.h header file.
     */
    data->set.timecondition = (curl_TimeCond)va_arg(param, long);
    break;
  case CURLOPT_TIMEVALUE:
    /*
     * This is the value to compare with the remote document with the
     * method set with CURLOPT_TIMECONDITION
     */
    data->set.timevalue = (time_t)va_arg(param, long);
    break;
  case CURLOPT_SSLVERSION:
    /*
     * Set explicit SSL version to try to connect with, as some SSL
     * implementations are lame.
     */
    data->set.ssl.version = va_arg(param, long);
    break;

#ifndef CURL_DISABLE_HTTP
  case CURLOPT_AUTOREFERER:
    /*
     * Switch on automatic referer that gets set if curl follows locations.
     */
    data->set.http_auto_referer = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_ENCODING:
    /*
     * String to use at the value of Accept-Encoding header.
     *
     * If the encoding is set to "" we use an Accept-Encoding header that
     * encompasses all the encodings we support.
     * If the encoding is set to NULL we don't send an Accept-Encoding header
     * and ignore an received Content-Encoding header.
     *
     */
    argptr = va_arg(param, char *);
    result = Curl_setstropt(&data->set.str[STRING_ENCODING],
                            (argptr && !*argptr)?
                            (char *) ALL_CONTENT_ENCODINGS: argptr);
    break;

  case CURLOPT_FOLLOWLOCATION:
    /*
     * Follow Location: header hints on a HTTP-server.
     */
    data->set.http_follow_location = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_UNRESTRICTED_AUTH:
    /*
     * Send authentication (user+password) when following locations, even when
     * hostname changed.
     */
    data->set.http_disable_hostname_check_before_authentication =
      (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_MAXREDIRS:
    /*
     * The maximum amount of hops you allow curl to follow Location:
     * headers. This should mostly be used to detect never-ending loops.
     */
    data->set.maxredirs = va_arg(param, long);
    break;

  case CURLOPT_POST:
    /* Does this option serve a purpose anymore? Yes it does, when
       CURLOPT_POSTFIELDS isn't used and the POST data is read off the
       callback! */
    if(va_arg(param, long)) {
      data->set.httpreq = HTTPREQ_POST;
      data->set.opt_no_body = FALSE; /* this is implied */
    }
    else
      data->set.httpreq = HTTPREQ_GET;
    break;

  case CURLOPT_POSTFIELDS:
    /*
     * A string with POST data. Makes curl HTTP POST. Even if it is NULL.
     */
    result = Curl_setstropt(&data->set.str[STRING_POSTFIELDS],
                            va_arg(param, char *));
    data->set.httpreq = HTTPREQ_POST;
    break;

  case CURLOPT_POSTFIELDSIZE:
    /*
     * The size of the POSTFIELD data to prevent libcurl to do strlen() to
     * figure it out. Enables binary posts.
     */
    data->set.postfieldsize = va_arg(param, long);
    break;

  case CURLOPT_POSTFIELDSIZE_LARGE:
    /*
     * The size of the POSTFIELD data to prevent libcurl to do strlen() to
     * figure it out. Enables binary posts.
     */
    data->set.postfieldsize = va_arg(param, curl_off_t);
    break;

  case CURLOPT_HTTPPOST:
    /*
     * Set to make us do HTTP POST
     */
    data->set.httppost = va_arg(param, struct curl_httppost *);
    data->set.httpreq = HTTPREQ_POST_FORM;
    data->set.opt_no_body = FALSE; /* this is implied */
    break;

  case CURLOPT_REFERER:
    /*
     * String to set in the HTTP Referer: field.
     */
    if(data->change.referer_alloc) {
      free(data->change.referer);
      data->change.referer_alloc = FALSE;
    }
    result = Curl_setstropt(&data->set.str[STRING_SET_REFERER],
                            va_arg(param, char *));
    data->change.referer = data->set.str[STRING_SET_REFERER];
    break;

  case CURLOPT_USERAGENT:
    /*
     * String to use in the HTTP User-Agent field
     */
    result = Curl_setstropt(&data->set.str[STRING_USERAGENT],
                            va_arg(param, char *));
    break;

  case CURLOPT_HTTPHEADER:
    /*
     * Set a list with HTTP headers to use (or replace internals with)
     */
    data->set.headers = va_arg(param, struct curl_slist *);
    break;

  case CURLOPT_HTTP200ALIASES:
    /*
     * Set a list of aliases for HTTP 200 in response header
     */
    data->set.http200aliases = va_arg(param, struct curl_slist *);
    break;

#if !defined(CURL_DISABLE_COOKIES)
  case CURLOPT_COOKIE:
    /*
     * Cookie string to send to the remote server in the request.
     */
    result = Curl_setstropt(&data->set.str[STRING_COOKIE],
                            va_arg(param, char *));
    break;

  case CURLOPT_COOKIEFILE:
    /*
     * Set cookie file to read and parse. Can be used multiple times.
     */
    argptr = (char *)va_arg(param, void *);
    if(argptr) {
      struct curl_slist *cl;
      /* append the cookie file name to the list of file names, and deal with
         them later */
      cl = curl_slist_append(data->change.cookielist, argptr);

      if(!cl)
        return CURLE_OUT_OF_MEMORY;

      data->change.cookielist = cl;
    }
    break;

  case CURLOPT_COOKIEJAR:
    /*
     * Set cookie file name to dump all cookies to when we're done.
     */
    result = Curl_setstropt(&data->set.str[STRING_COOKIEJAR],
                            va_arg(param, char *));

    /*
     * Activate the cookie parser. This may or may not already
     * have been made.
     */
    data->cookies = Curl_cookie_init(data, NULL, data->cookies,
                                     data->set.cookiesession);
    break;

  case CURLOPT_COOKIESESSION:
    /*
     * Set this option to TRUE to start a new "cookie session". It will
     * prevent the forthcoming read-cookies-from-file actions to accept
     * cookies that are marked as being session cookies, as they belong to a
     * previous session.
     *
     * In the original Netscape cookie spec, "session cookies" are cookies
     * with no expire date set. RFC2109 describes the same action if no
     * 'Max-Age' is set and RFC2965 includes the RFC2109 description and adds
     * a 'Discard' action that can enforce the discard even for cookies that
     * have a Max-Age.
     *
     * We run mostly with the original cookie spec, as hardly anyone implements
     * anything else.
     */
    data->set.cookiesession = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_COOKIELIST:
    argptr = va_arg(param, char *);

    if(argptr == NULL)
      break;

    if(strequal(argptr, "ALL")) {
      /* clear all cookies */
      Curl_cookie_clearall(data->cookies);
      break;
    }
    else if(strequal(argptr, "SESS")) {
      /* clear session cookies */
      Curl_cookie_clearsess(data->cookies);
      break;
    }

    if(!data->cookies)
      /* if cookie engine was not running, activate it */
      data->cookies = Curl_cookie_init(data, NULL, NULL, TRUE);

    argptr = strdup(argptr);
    if(!argptr) {
      result = CURLE_OUT_OF_MEMORY;
      break;
    }

    if(checkprefix("Set-Cookie:", argptr))
      /* HTTP Header format line */
      Curl_cookie_add(data, data->cookies, TRUE, argptr + 11, NULL, NULL);

    else
      /* Netscape format line */
      Curl_cookie_add(data, data->cookies, FALSE, argptr, NULL, NULL);

    free(argptr);
    break;
#endif /* CURL_DISABLE_COOKIES */

  case CURLOPT_HTTPGET:
    /*
     * Set to force us do HTTP GET
     */
    if(va_arg(param, long)) {
      data->set.httpreq = HTTPREQ_GET;
      data->set.upload = FALSE; /* switch off upload */
      data->set.opt_no_body = FALSE; /* this is implied */
    }
    break;

  case CURLOPT_HTTP_VERSION:
    /*
     * This sets a requested HTTP version to be used. The value is one of
     * the listed enums in curl/curl.h.
     */
    data->set.httpversion = va_arg(param, long);
    break;

  case CURLOPT_HTTPPROXYTUNNEL:
    /*
     * Tunnel operations through the proxy instead of normal proxy use
     */
    data->set.tunnel_thru_httpproxy = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_CUSTOMREQUEST:
    /*
     * Set a custom string to use as request
     */
    result = Curl_setstropt(&data->set.str[STRING_CUSTOMREQUEST],
                            va_arg(param, char *));

    /* we don't set
       data->set.httpreq = HTTPREQ_CUSTOM;
       here, we continue as if we were using the already set type
       and this just changes the actual request keyword */
    break;

  case CURLOPT_PROXYPORT:
    /*
     * Explicitly set HTTP proxy port number.
     */
    data->set.proxyport = va_arg(param, long);
    break;

  case CURLOPT_HTTPAUTH:
    /*
     * Set HTTP Authentication type BITMASK.
     */
  {
    long auth = va_arg(param, long);
    /* switch off bits we can't support */
#ifndef USE_NTLM
    auth &= ~CURLAUTH_NTLM; /* no NTLM without SSL */
#endif
#ifndef HAVE_GSSAPI
    auth &= ~CURLAUTH_GSSNEGOTIATE; /* no GSS-Negotiate without GSSAPI */
#endif
    if(!auth)
      return CURLE_FAILED_INIT; /* no supported types left! */

    data->set.httpauth = auth;
  }
  break;

  case CURLOPT_PROXYAUTH:
    /*
     * Set HTTP Authentication type BITMASK.
     */
  {
    long auth = va_arg(param, long);
    /* switch off bits we can't support */
#ifndef USE_NTLM
    auth &= ~CURLAUTH_NTLM; /* no NTLM without SSL */
#endif
#ifndef HAVE_GSSAPI
    auth &= ~CURLAUTH_GSSNEGOTIATE; /* no GSS-Negotiate without GSSAPI */
#endif
    if(!auth)
      return CURLE_FAILED_INIT; /* no supported types left! */

    data->set.proxyauth = auth;
  }
  break;
#endif   /* CURL_DISABLE_HTTP */

  case CURLOPT_PROXY:
    /*
     * Set proxy server:port to use as HTTP proxy.
     *
     * If the proxy is set to "" we explicitly say that we don't want to use a
     * proxy (even though there might be environment variables saying so).
     *
     * Setting it to NULL, means no proxy but allows the environment variables
     * to decide for us.
     */
    result = Curl_setstropt(&data->set.str[STRING_PROXY],
                            va_arg(param, char *));
    break;

  case CURLOPT_WRITEHEADER:
    /*
     * Custom pointer to pass the header write callback function
     */
    data->set.writeheader = (void *)va_arg(param, void *);
    break;
  case CURLOPT_ERRORBUFFER:
    /*
     * Error buffer provided by the caller to get the human readable
     * error string in.
     */
    data->set.errorbuffer = va_arg(param, char *);
    break;
  case CURLOPT_FILE:
    /*
     * FILE pointer to write to or include in the data write callback
     */
    data->set.out = va_arg(param, FILE *);
    break;
  case CURLOPT_FTPPORT:
    /*
     * Use FTP PORT, this also specifies which IP address to use
     */
    result = Curl_setstropt(&data->set.str[STRING_FTPPORT],
                            va_arg(param, char *));
    data->set.ftp_use_port = (bool)(NULL != data->set.str[STRING_FTPPORT]);
    break;

  case CURLOPT_FTP_USE_EPRT:
    data->set.ftp_use_eprt = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_FTP_USE_EPSV:
    data->set.ftp_use_epsv = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_FTP_SSL_CCC:
    data->set.ftp_ccc = (curl_ftpccc)va_arg(param, long);
    break;

  case CURLOPT_FTP_SKIP_PASV_IP:
    /*
     * Enable or disable FTP_SKIP_PASV_IP, which will disable/enable the
     * bypass of the IP address in PASV responses.
     */
    data->set.ftp_skip_ip = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_INFILE:
    /*
     * FILE pointer to read the file to be uploaded from. Or possibly
     * used as argument to the read callback.
     */
    data->set.in = va_arg(param, FILE *);
    break;
  case CURLOPT_INFILESIZE:
    /*
     * If known, this should inform curl about the file size of the
     * to-be-uploaded file.
     */
    data->set.infilesize = va_arg(param, long);
    break;
  case CURLOPT_INFILESIZE_LARGE:
    /*
     * If known, this should inform curl about the file size of the
     * to-be-uploaded file.
     */
    data->set.infilesize = va_arg(param, curl_off_t);
    break;
  case CURLOPT_LOW_SPEED_LIMIT:
    /*
     * The low speed limit that if transfers are below this for
     * CURLOPT_LOW_SPEED_TIME, the transfer is aborted.
     */
    data->set.low_speed_limit=va_arg(param, long);
    break;
  case CURLOPT_MAX_SEND_SPEED_LARGE:
    /*
     * The max speed limit that sends transfer more than
     * CURLOPT_MAX_SEND_PER_SECOND bytes per second the transfer is
     * throttled..
     */
    data->set.max_send_speed=va_arg(param, curl_off_t);
    break;
  case CURLOPT_MAX_RECV_SPEED_LARGE:
    /*
     * The max speed limit that sends transfer more than
     * CURLOPT_MAX_RECV_PER_SECOND bytes per second the transfer is
     * throttled..
     */
    data->set.max_recv_speed=va_arg(param, curl_off_t);
    break;
  case CURLOPT_LOW_SPEED_TIME:
    /*
     * The low speed time that if transfers are below the set
     * CURLOPT_LOW_SPEED_LIMIT during this time, the transfer is aborted.
     */
    data->set.low_speed_time=va_arg(param, long);
    break;
  case CURLOPT_URL:
    /*
     * The URL to fetch.
     */
    if(data->change.url_alloc) {
      /* the already set URL is allocated, free it first! */
      free(data->change.url);
      data->change.url_alloc=FALSE;
    }
    result = Curl_setstropt(&data->set.str[STRING_SET_URL],
                            va_arg(param, char *));
    data->change.url = data->set.str[STRING_SET_URL];
    if (data->change.url)
      data->change.url_changed = TRUE;
    break;
  case CURLOPT_PORT:
    /*
     * The port number to use when getting the URL
     */
    data->set.use_port = va_arg(param, long);
    break;
  case CURLOPT_TIMEOUT:
    /*
     * The maximum time you allow curl to use for a single transfer
     * operation.
     */
    data->set.timeout = va_arg(param, long) * 1000L;
    break;

  case CURLOPT_TIMEOUT_MS:
    data->set.timeout = va_arg(param, long);
    break;

  case CURLOPT_CONNECTTIMEOUT:
    /*
     * The maximum time you allow curl to use to connect.
     */
    data->set.connecttimeout = va_arg(param, long) * 1000L;
    break;

  case CURLOPT_CONNECTTIMEOUT_MS:
    data->set.connecttimeout = va_arg(param, long);
    break;

  case CURLOPT_USERPWD:
    /*
     * user:password to use in the operation
     */
    result = Curl_setstropt(&data->set.str[STRING_USERPWD],
                            va_arg(param, char *));
    break;
  case CURLOPT_POSTQUOTE:
    /*
     * List of RAW FTP commands to use after a transfer
     */
    data->set.postquote = va_arg(param, struct curl_slist *);
    break;
  case CURLOPT_PREQUOTE:
    /*
     * List of RAW FTP commands to use prior to RETR (Wesley Laxton)
     */
    data->set.prequote = va_arg(param, struct curl_slist *);
    break;
  case CURLOPT_QUOTE:
    /*
     * List of RAW FTP commands to use before a transfer
     */
    data->set.quote = va_arg(param, struct curl_slist *);
    break;
  case CURLOPT_PROGRESSFUNCTION:
    /*
     * Progress callback function
     */
    data->set.fprogress = va_arg(param, curl_progress_callback);
    if(data->set.fprogress)
      data->progress.callback = TRUE; /* no longer internal */
    else
      data->progress.callback = FALSE; /* NULL enforces internal */

    break;
  case CURLOPT_PROGRESSDATA:
    /*
     * Custom client data to pass to the progress callback
     */
    data->set.progress_client = va_arg(param, void *);
    break;
  case CURLOPT_PROXYUSERPWD:
    /*
     * user:password needed to use the proxy
     */
    result = Curl_setstropt(&data->set.str[STRING_PROXYUSERPWD],
                            va_arg(param, char *));
    break;
  case CURLOPT_RANGE:
    /*
     * What range of the file you want to transfer
     */
    result = Curl_setstropt(&data->set.str[STRING_SET_RANGE],
                            va_arg(param, char *));
    break;
  case CURLOPT_RESUME_FROM:
    /*
     * Resume transfer at the give file position
     */
    data->set.set_resume_from = va_arg(param, long);
    break;
  case CURLOPT_RESUME_FROM_LARGE:
    /*
     * Resume transfer at the give file position
     */
    data->set.set_resume_from = va_arg(param, curl_off_t);
    break;
  case CURLOPT_DEBUGFUNCTION:
    /*
     * stderr write callback.
     */
    data->set.fdebug = va_arg(param, curl_debug_callback);
    /*
     * if the callback provided is NULL, it'll use the default callback
     */
    break;
  case CURLOPT_DEBUGDATA:
    /*
     * Set to a void * that should receive all error writes. This
     * defaults to CURLOPT_STDERR for normal operations.
     */
    data->set.debugdata = va_arg(param, void *);
    break;
  case CURLOPT_STDERR:
    /*
     * Set to a FILE * that should receive all error writes. This
     * defaults to stderr for normal operations.
     */
    data->set.err = va_arg(param, FILE *);
    if(!data->set.err)
      data->set.err = stderr;
    break;
  case CURLOPT_HEADERFUNCTION:
    /*
     * Set header write callback
     */
    data->set.fwrite_header = va_arg(param, curl_write_callback);
    break;
  case CURLOPT_WRITEFUNCTION:
    /*
     * Set data write callback
     */
    data->set.fwrite_func = va_arg(param, curl_write_callback);
    if(!data->set.fwrite_func)
      /* When set to NULL, reset to our internal default function */
      data->set.fwrite_func = (curl_write_callback)fwrite;
    break;
  case CURLOPT_READFUNCTION:
    /*
     * Read data callback
     */
    data->set.fread_func = va_arg(param, curl_read_callback);
    if(!data->set.fread_func)
      /* When set to NULL, reset to our internal default function */
      data->set.fread_func = (curl_read_callback)fread;
    break;
  case CURLOPT_CONV_FROM_NETWORK_FUNCTION:
    /*
     * "Convert from network encoding" callback
     */
    data->set.convfromnetwork = va_arg(param, curl_conv_callback);
    break;
  case CURLOPT_CONV_TO_NETWORK_FUNCTION:
    /*
     * "Convert to network encoding" callback
     */
    data->set.convtonetwork = va_arg(param, curl_conv_callback);
    break;
  case CURLOPT_CONV_FROM_UTF8_FUNCTION:
    /*
     * "Convert from UTF-8 encoding" callback
     */
    data->set.convfromutf8 = va_arg(param, curl_conv_callback);
    break;
  case CURLOPT_IOCTLFUNCTION:
    /*
     * I/O control callback. Might be NULL.
     */
    data->set.ioctl_func = va_arg(param, curl_ioctl_callback);
    break;
  case CURLOPT_IOCTLDATA:
    /*
     * I/O control data pointer. Might be NULL.
     */
    data->set.ioctl_client = va_arg(param, void *);
    break;
  case CURLOPT_SSLCERT:
    /*
     * String that holds file name of the SSL certificate to use
     */
    result = Curl_setstropt(&data->set.str[STRING_CERT],
                            va_arg(param, char *));
    break;
  case CURLOPT_SSLCERTTYPE:
    /*
     * String that holds file type of the SSL certificate to use
     */
    result = Curl_setstropt(&data->set.str[STRING_CERT_TYPE],
                            va_arg(param, char *));
    break;
  case CURLOPT_SSLKEY:
    /*
     * String that holds file name of the SSL certificate to use
     */
    result = Curl_setstropt(&data->set.str[STRING_KEY],
                            va_arg(param, char *));
    break;
  case CURLOPT_SSLKEYTYPE:
    /*
     * String that holds file type of the SSL certificate to use
     */
    result = Curl_setstropt(&data->set.str[STRING_KEY_TYPE],
                            va_arg(param, char *));
    break;
  case CURLOPT_SSLKEYPASSWD:
    /*
     * String that holds the SSL private key password.
     */
    result = Curl_setstropt(&data->set.str[STRING_KEY_PASSWD],
                            va_arg(param, char *));
    break;
  case CURLOPT_SSLENGINE:
    /*
     * String that holds the SSL crypto engine.
     */
    argptr = va_arg(param, char *);
    if (argptr && argptr[0])
       result = Curl_ssl_set_engine(data, argptr);
    break;

  case CURLOPT_SSLENGINE_DEFAULT:
    /*
     * flag to set engine as default.
     */
    result = Curl_ssl_set_engine_default(data);
    break;
  case CURLOPT_CRLF:
    /*
     * Kludgy option to enable CRLF conversions. Subject for removal.
     */
    data->set.crlf = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_INTERFACE:
    /*
     * Set what interface or address/hostname to bind the socket to when
     * performing an operation and thus what from-IP your connection will use.
     */
    result = Curl_setstropt(&data->set.str[STRING_DEVICE],
                            va_arg(param, char *));
    break;
  case CURLOPT_LOCALPORT:
    /*
     * Set what local port to bind the socket to when performing an operation.
     */
    data->set.localport = (unsigned short) va_arg(param, long);
    break;
  case CURLOPT_LOCALPORTRANGE:
    /*
     * Set number of local ports to try, starting with CURLOPT_LOCALPORT.
     */
    data->set.localportrange = (int) va_arg(param, long);
    break;
  case CURLOPT_KRBLEVEL:
    /*
     * A string that defines the kerberos security level.
     */
    result = Curl_setstropt(&data->set.str[STRING_KRB_LEVEL],
                            va_arg(param, char *));
    data->set.krb = (bool)(NULL != data->set.str[STRING_KRB_LEVEL]);
    break;
  case CURLOPT_SSL_VERIFYPEER:
    /*
     * Enable peer SSL verifying.
     */
    data->set.ssl.verifypeer = va_arg(param, long);
    break;
  case CURLOPT_SSL_VERIFYHOST:
    /*
     * Enable verification of the CN contained in the peer certificate
     */
    data->set.ssl.verifyhost = va_arg(param, long);
    break;
  case CURLOPT_SSL_CTX_FUNCTION:
    /*
     * Set a SSL_CTX callback
     */
    data->set.ssl.fsslctx = va_arg(param, curl_ssl_ctx_callback);
    break;
  case CURLOPT_SSL_CTX_DATA:
    /*
     * Set a SSL_CTX callback parameter pointer
     */
    data->set.ssl.fsslctxp = va_arg(param, void *);
    break;
  case CURLOPT_CAINFO:
    /*
     * Set CA info for SSL connection. Specify file name of the CA certificate
     */
    result = Curl_setstropt(&data->set.str[STRING_SSL_CAFILE],
                            va_arg(param, char *));
    break;
  case CURLOPT_CAPATH:
    /*
     * Set CA path info for SSL connection. Specify directory name of the CA
     * certificates which have been prepared using openssl c_rehash utility.
     */
    /* This does not work on windows. */
    result = Curl_setstropt(&data->set.str[STRING_SSL_CAPATH],
                            va_arg(param, char *));
    break;
  case CURLOPT_TELNETOPTIONS:
    /*
     * Set a linked list of telnet options
     */
    data->set.telnet_options = va_arg(param, struct curl_slist *);
    break;

  case CURLOPT_BUFFERSIZE:
    /*
     * The application kindly asks for a differently sized receive buffer.
     * If it seems reasonable, we'll use it.
     */
    data->set.buffer_size = va_arg(param, long);

    if((data->set.buffer_size> (BUFSIZE -1 )) ||
       (data->set.buffer_size < 1))
      data->set.buffer_size = 0; /* huge internal default */

    break;

  case CURLOPT_NOSIGNAL:
    /*
     * The application asks not to set any signal() or alarm() handlers,
     * even when using a timeout.
     */
    data->set.no_signal = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_SHARE:
    {
      struct Curl_share *set;
      set = va_arg(param, struct Curl_share *);

      /* disconnect from old share, if any */
      if(data->share) {
        Curl_share_lock(data, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE);

        if(data->dns.hostcachetype == HCACHE_SHARED) {
          data->dns.hostcache = NULL;
          data->dns.hostcachetype = HCACHE_NONE;
        }

        if(data->share->cookies == data->cookies)
          data->cookies = NULL;

        data->share->dirty--;

        Curl_share_unlock(data, CURL_LOCK_DATA_SHARE);
        data->share = NULL;
      }

      /* use new share if it set */
      data->share = set;
      if(data->share) {

        Curl_share_lock(data, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE);

        data->share->dirty++;

        if(data->share->hostcache) {
          /* use shared host cache, first free the private one if any */
          if(data->dns.hostcachetype == HCACHE_PRIVATE)
            Curl_hash_destroy(data->dns.hostcache);

          data->dns.hostcache = data->share->hostcache;
          data->dns.hostcachetype = HCACHE_SHARED;
        }
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
        if(data->share->cookies) {
          /* use shared cookie list, first free own one if any */
          if (data->cookies)
            Curl_cookie_cleanup(data->cookies);
          data->cookies = data->share->cookies;
        }
#endif   /* CURL_DISABLE_HTTP */
        Curl_share_unlock(data, CURL_LOCK_DATA_SHARE);

      }
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
      /* check cookie list is set */
      if(!data->cookies)
        data->cookies = Curl_cookie_init(data, NULL, NULL, TRUE );
#endif   /* CURL_DISABLE_HTTP */
      /* check for host cache not needed,
       * it will be done by curl_easy_perform */
    }
    break;

  case CURLOPT_PROXYTYPE:
    /*
     * Set proxy type. HTTP/SOCKS4/SOCKS5
     */
    data->set.proxytype = (curl_proxytype)va_arg(param, long);
    break;

  case CURLOPT_PRIVATE:
    /*
     * Set private data pointer.
     */
    data->set.private_data = va_arg(param, void *);
    break;

  case CURLOPT_MAXFILESIZE:
    /*
     * Set the maximum size of a file to download.
     */
    data->set.max_filesize = va_arg(param, long);
    break;

  case CURLOPT_FTP_SSL:
    /*
     * Make FTP transfers attempt to use SSL/TLS.
     */
    data->set.ftp_ssl = (curl_ftpssl)va_arg(param, long);
    break;

  case CURLOPT_FTPSSLAUTH:
    /*
     * Set a specific auth for FTP-SSL transfers.
     */
    data->set.ftpsslauth = (curl_ftpauth)va_arg(param, long);
    break;

  case CURLOPT_IPRESOLVE:
    data->set.ip_version = va_arg(param, long);
    break;

  case CURLOPT_MAXFILESIZE_LARGE:
    /*
     * Set the maximum size of a file to download.
     */
    data->set.max_filesize = va_arg(param, curl_off_t);
    break;

  case CURLOPT_TCP_NODELAY:
    /*
     * Enable or disable TCP_NODELAY, which will disable/enable the Nagle
     * algorithm
     */
    data->set.tcp_nodelay = (bool)(0 != va_arg(param, long));
    break;

    /*
      case CURLOPT_SOURCE_URL:
      case CURLOPT_SOURCE_USERPWD:
      case CURLOPT_SOURCE_QUOTE:
      case CURLOPT_SOURCE_PREQUOTE:
      case CURLOPT_SOURCE_POSTQUOTE:
      These former 3rd party transfer options are deprecated */

  case CURLOPT_FTP_ACCOUNT:
    result = Curl_setstropt(&data->set.str[STRING_FTP_ACCOUNT],
                            va_arg(param, char *));
    break;

  case CURLOPT_IGNORE_CONTENT_LENGTH:
    data->set.ignorecl = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_CONNECT_ONLY:
    /*
     * No data transfer, set up connection and let application use the socket
     */
    data->set.connect_only = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_FTP_ALTERNATIVE_TO_USER:
    result = Curl_setstropt(&data->set.str[STRING_FTP_ALTERNATIVE_TO_USER],
                            va_arg(param, char *));
    break;

  case CURLOPT_SOCKOPTFUNCTION:
    /*
     * socket callback function: called after socket() but before connect()
     */
    data->set.fsockopt = va_arg(param, curl_sockopt_callback);
    break;

  case CURLOPT_SOCKOPTDATA:
    /*
     * socket callback data pointer. Might be NULL.
     */
    data->set.sockopt_client = va_arg(param, void *);
    break;

  case CURLOPT_SSL_SESSIONID_CACHE:
    data->set.ssl.sessionid = (bool)(0 != va_arg(param, long));
    break;

  case CURLOPT_SSH_AUTH_TYPES:
    data->set.ssh_auth_types = va_arg(param, long);
    break;

  case CURLOPT_SSH_PUBLIC_KEYFILE:
    /*
     * Use this file instead of the $HOME/.ssh/id_dsa.pub file
     */
    result = Curl_setstropt(&data->set.str[STRING_SSH_PUBLIC_KEY],
                            va_arg(param, char *));
    break;

  case CURLOPT_SSH_PRIVATE_KEYFILE:
    /*
     * Use this file instead of the $HOME/.ssh/id_dsa file
     */
    result = Curl_setstropt(&data->set.str[STRING_SSH_PRIVATE_KEY],
                            va_arg(param, char *));
    break;

  case CURLOPT_HTTP_TRANSFER_DECODING:
    /*
     * disable libcurl transfer encoding is used
     */
    data->set.http_te_skip = (bool)(0 == va_arg(param, long));
    break;

  case CURLOPT_HTTP_CONTENT_DECODING:
    /*
     * raw data passed to the application when content encoding is used
     */
    data->set.http_ce_skip = (bool)(0 == va_arg(param, long));
    break;

  case CURLOPT_NEW_FILE_PERMS:
    /*
     * Uses these permissions instead of 0644
     */
    data->set.new_file_perms = va_arg(param, long);
    break;

  case CURLOPT_NEW_DIRECTORY_PERMS:
    /*
     * Uses these permissions instead of 0755
     */
    data->set.new_directory_perms = va_arg(param, long);
    break;

  default:
    /* unknown tag and its companion, just ignore: */
    result = CURLE_FAILED_INIT; /* correct this */
    break;
  }

  return result;
}

static void conn_free(struct connectdata *conn)
{
  if (!conn)
    return;

  /* close possibly still open sockets */
  if(CURL_SOCKET_BAD != conn->sock[SECONDARYSOCKET])
    sclose(conn->sock[SECONDARYSOCKET]);
  if(CURL_SOCKET_BAD != conn->sock[FIRSTSOCKET])
    sclose(conn->sock[FIRSTSOCKET]);

  Curl_safefree(conn->user);
  Curl_safefree(conn->passwd);
  Curl_safefree(conn->proxyuser);
  Curl_safefree(conn->proxypasswd);
  Curl_safefree(conn->allocptr.proxyuserpwd);
  Curl_safefree(conn->allocptr.uagent);
  Curl_safefree(conn->allocptr.userpwd);
  Curl_safefree(conn->allocptr.accept_encoding);
  Curl_safefree(conn->allocptr.rangeline);
  Curl_safefree(conn->allocptr.ref);
  Curl_safefree(conn->allocptr.host);
  Curl_safefree(conn->allocptr.cookiehost);
  Curl_safefree(conn->ip_addr_str);
  Curl_safefree(conn->trailer);
  Curl_safefree(conn->host.rawalloc); /* host name buffer */
  Curl_safefree(conn->proxy.rawalloc); /* proxy name buffer */
  Curl_safefree(conn->master_buffer);

  Curl_llist_destroy(conn->send_pipe, NULL);
  Curl_llist_destroy(conn->recv_pipe, NULL);

  /* possible left-overs from the async name resolvers */
#if defined(USE_ARES)
  Curl_safefree(conn->async.hostname);
  Curl_safefree(conn->async.os_specific);
#elif defined(CURLRES_THREADED)
  Curl_destroy_thread_data(&conn->async);
#endif

  Curl_ssl_close(conn, FIRSTSOCKET);
  Curl_ssl_close(conn, SECONDARYSOCKET);

  Curl_free_ssl_config(&conn->ssl_config);

  free(conn); /* free all the connection oriented data */
}

CURLcode Curl_disconnect(struct connectdata *conn)
{
  struct SessionHandle *data;
  if(!conn)
    return CURLE_OK; /* this is closed and fine already */
  data = conn->data;

  if(!data) {
    DEBUGF(infof(data, "DISCONNECT without easy handle, ignoring\n"));
    return CURLE_OK;
  }

#if defined(CURLDEBUG) && defined(AGGRESIVE_TEST)
  /* scan for DNS cache entries still marked as in use */
  Curl_hash_apply(data->hostcache,
                  NULL, Curl_scan_cache_used);
#endif

  Curl_expire(data, 0); /* shut off timers */
  Curl_hostcache_prune(data); /* kill old DNS cache entries */

  if((conn->ntlm.state != NTLMSTATE_NONE) ||
     (conn->proxyntlm.state != NTLMSTATE_NONE)) {
    /* Authentication data is a mix of connection-related and sessionhandle-
       related stuff. NTLM is connection-related so when we close the shop
       we shall forget. */
    data->state.authhost.done = FALSE;
    data->state.authhost.picked =
      data->state.authhost.want;

    data->state.authproxy.done = FALSE;
    data->state.authproxy.picked =
      data->state.authproxy.want;

    data->state.authproblem = FALSE;

    Curl_ntlm_cleanup(conn);
  }

  if(conn->curl_disconnect)
    /* This is set if protocol-specific cleanups should be made */
    conn->curl_disconnect(conn);

  if(-1 != conn->connectindex) {
    /* unlink ourselves! */
    infof(data, "Closing connection #%ld\n", conn->connectindex);
    if(data->state.connc)
      /* only clear the table entry if we still know in which cache we
         used to be in */
      data->state.connc->connects[conn->connectindex] = NULL;
  }

#ifdef USE_LIBIDN
  if(conn->host.encalloc)
    idn_free(conn->host.encalloc); /* encoded host name buffer, must be freed
                                      with idn_free() since this was allocated
                                      by libidn */
  if(conn->proxy.encalloc)
    idn_free(conn->proxy.encalloc); /* encoded proxy name buffer, must be
                                       freed with idn_free() since this was
                                       allocated by libidn */
#endif

  Curl_ssl_close(conn, FIRSTSOCKET);

  /* Indicate to all handles on the pipe that we're dead */
  if (IsPipeliningEnabled(data)) {
    signalPipeClose(conn->send_pipe);
    signalPipeClose(conn->recv_pipe);
  }

  conn_free(conn);

  return CURLE_OK;
}

/*
 * This function should return TRUE if the socket is to be assumed to
 * be dead. Most commonly this happens when the server has closed the
 * connection due to inactivity.
 */
static bool SocketIsDead(curl_socket_t sock)
{
  int sval;
  bool ret_val = TRUE;

  sval = Curl_socket_ready(sock, CURL_SOCKET_BAD, 0);
  if(sval == 0)
    /* timeout */
    ret_val = FALSE;

  return ret_val;
}

static bool IsPipeliningPossible(struct SessionHandle *handle)
{
  if (handle->multi && Curl_multi_canPipeline(handle->multi) &&
      (handle->set.httpreq == HTTPREQ_GET ||
       handle->set.httpreq == HTTPREQ_HEAD) &&
      handle->set.httpversion != CURL_HTTP_VERSION_1_0)
    return TRUE;

  return FALSE;
}

static bool IsPipeliningEnabled(struct SessionHandle *handle)
{
  if (handle->multi && Curl_multi_canPipeline(handle->multi))
    return TRUE;

  return FALSE;
}

CURLcode Curl_addHandleToPipeline(struct SessionHandle *data,
                                  struct curl_llist *pipe)
{
#ifdef CURLDEBUG
  if(!IsPipeliningPossible(data)) {
    /* when not pipelined, there MUST be no handle in the list already */
    if(pipe->head)
      infof(data, "PIPE when no PIPE supposed!\n");
  }
#endif
  if (!Curl_llist_insert_next(pipe, pipe->tail, data))
    return CURLE_OUT_OF_MEMORY;
  return CURLE_OK;
}


int Curl_removeHandleFromPipeline(struct SessionHandle *handle,
                                   struct curl_llist *pipe)
{
  struct curl_llist_element *curr;

  curr = pipe->head;
  while (curr) {
    if (curr->ptr == handle) {
      Curl_llist_remove(pipe, curr, NULL);
      return 1; /* we removed a handle */
    }
    curr = curr->next;
  }

  return 0;
}

#if 0 /* this code is saved here as it is useful for debugging purposes */
static void Curl_printPipeline(struct curl_llist *pipe)
{
  struct curl_llist_element *curr;

  curr = pipe->head;
  while (curr) {
    struct SessionHandle *data = (struct SessionHandle *) curr->ptr;
    infof(data, "Handle in pipeline: %s\n", data->reqdata.path);
    curr = curr->next;
  }
}
#endif

bool Curl_isHandleAtHead(struct SessionHandle *handle,
                         struct curl_llist *pipe)
{
  struct curl_llist_element *curr = pipe->head;
  if (curr) {
    return (bool)(curr->ptr == handle);
  }

  return FALSE;
}

static struct SessionHandle* gethandleathead(struct curl_llist *pipe)
{
  struct curl_llist_element *curr = pipe->head;
  if (curr) {
    return (struct SessionHandle *) curr->ptr;
  }

  return NULL;
}

static void signalPipeClose(struct curl_llist *pipe)
{
  struct curl_llist_element *curr;

  if (!pipe)
    return;

  curr = pipe->head;
  while (curr) {
    struct curl_llist_element *next = curr->next;
    struct SessionHandle *data = (struct SessionHandle *) curr->ptr;

#ifdef CURLDEBUG /* debug-only code */
    if(data->magic != CURLEASY_MAGIC_NUMBER) {
      /* MAJOR BADNESS */
      infof(data, "signalPipeClose() found BAAD easy handle\n");
    }
#endif

    data->state.pipe_broke = TRUE;
    Curl_multi_handlePipeBreak(data);
    Curl_llist_remove(pipe, curr, NULL);
    curr = next;
  }
}


/*
 * Given one filled in connection struct (named needle), this function should
 * detect if there already is one that has all the significant details
 * exactly the same and thus should be used instead.
 *
 * If there is a match, this function returns TRUE - and has marked the
 * connection as 'in-use'. It must later be called with ConnectionDone() to
 * return back to 'idle' (unused) state.
 */
static bool
ConnectionExists(struct SessionHandle *data,
                 struct connectdata *needle,
                 struct connectdata **usethis)
{
  long i;
  struct connectdata *check;
  bool canPipeline = IsPipeliningPossible(data);

  for(i=0; i< data->state.connc->num; i++) {
    bool match = FALSE;
    size_t pipeLen = 0;
    /*
     * Note that if we use a HTTP proxy, we check connections to that
     * proxy and not to the actual remote server.
     */
    check = data->state.connc->connects[i];
    if(!check)
      /* NULL pointer means not filled-in entry */
      continue;

    pipeLen = check->send_pipe->size + check->recv_pipe->size;

    if (check->connectindex == -1) {
      check->connectindex = i; /* Set this appropriately since it might have
                                  been set to -1 when the easy was removed
                                  from the multi */
    }

    if(pipeLen > 0 && !canPipeline) {
      /* can only happen within multi handles, and means that another easy
         handle is using this connection */
      continue;
    }

#ifdef CURLRES_ASYNCH
    /* ip_addr_str is NULL only if the resolving of the name hasn't completed
       yet and until then we don't re-use this connection */
    if (!check->ip_addr_str) {
      infof(data,
            "Connection #%ld hasn't finished name resolve, can't reuse\n",
            check->connectindex);
      continue;
    }
#endif

    if ((check->sock[FIRSTSOCKET] == CURL_SOCKET_BAD) || check->bits.close) {
      /* Don't pick a connection that hasn't connected yet or that is going to
         get closed. */
      infof(data, "Connection #%ld isn't open enough, can't reuse\n",
            check->connectindex);
#ifdef CURLDEBUG
      if (check->recv_pipe->size > 0) {
        infof(data, "BAD! Unconnected #%ld has a non-empty recv pipeline!\n",
              check->connectindex);
      }
#endif
      continue;
    }

    if (pipeLen >= MAX_PIPELINE_LENGTH) {
      infof(data, "Connection #%ld has its pipeline full, can't reuse\n",
            check->connectindex);
      continue;
    }

    if (canPipeline) {
      /* Make sure the pipe has only GET requests */
      struct SessionHandle* sh = gethandleathead(check->send_pipe);
      struct SessionHandle* rh = gethandleathead(check->recv_pipe);
      if (sh) {
        if(!IsPipeliningPossible(sh))
          continue;
      }
      else if (rh) {
        if(!IsPipeliningPossible(rh))
          continue;
      }
    }

    if((needle->protocol&PROT_SSL) != (check->protocol&PROT_SSL))
      /* don't do mixed SSL and non-SSL connections */
      continue;

    if(!needle->bits.httpproxy || needle->protocol&PROT_SSL) {
      /* The requested connection does not use a HTTP proxy or it
         uses SSL. */

      if(!(needle->protocol&PROT_SSL) && check->bits.httpproxy)
        /* we don't do SSL but the cached connection has a proxy,
           then don't match this */
        continue;

      if(strequal(needle->protostr, check->protostr) &&
         strequal(needle->host.name, check->host.name) &&
         (needle->remote_port == check->remote_port) ) {
        if(needle->protocol & PROT_SSL) {
          /* This is SSL, verify that we're using the same
             ssl options as well */
          if(!Curl_ssl_config_matches(&needle->ssl_config,
                                      &check->ssl_config)) {
            infof(data,
                  "Connection #%ld has different SSL parameters, "
                  "can't reuse\n",
                  check->connectindex );
            continue;
          }
        }
        if((needle->protocol & PROT_FTP) ||
           ((needle->protocol & PROT_HTTP) &&
            (data->state.authhost.want==CURLAUTH_NTLM))) {
          /* This is FTP or HTTP+NTLM, verify that we're using the same name
             and password as well */
          if(!strequal(needle->user, check->user) ||
             !strequal(needle->passwd, check->passwd)) {
            /* one of them was different */
            continue;
          }
        }
        match = TRUE;
      }
    }
    else { /* The requested needle connection is using a proxy,
              is the checked one using the same host, port and type? */
      if(check->bits.proxy &&
         (needle->proxytype == check->proxytype) &&
         strequal(needle->proxy.name, check->proxy.name) &&
         needle->port == check->port) {
        /* This is the same proxy connection, use it! */
        match = TRUE;
      }
    }

    if(match) {
      if (!IsPipeliningEnabled(data)) {
        /* The check for a dead socket makes sense only in the
           non-pipelining case */
        bool dead = SocketIsDead(check->sock[FIRSTSOCKET]);
        if(dead) {
          check->data = data;
          infof(data, "Connection #%d seems to be dead!\n", i);

          Curl_disconnect(check); /* disconnect resources */
          data->state.connc->connects[i]=NULL; /* nothing here */

          return FALSE;
        }
      }

      check->inuse = TRUE; /* mark this as being in use so that no other
                              handle in a multi stack may nick it */
      if (canPipeline) {
        /* Mark the connection as being in a pipeline */
        check->is_in_pipeline = TRUE;
      }

      *usethis = check;
      return TRUE; /* yes, we found one to use! */
    }
  }

  return FALSE; /* no matching connecting exists */
}



/*
 * This function frees/closes a connection in the connection cache. This
 * should take the previously set policy into account when deciding which
 * of the connections to kill.
 */
static long
ConnectionKillOne(struct SessionHandle *data)
{
  long i;
  struct connectdata *conn;
  long highscore=-1;
  long connindex=-1;
  long score;
  struct timeval now;

  now = Curl_tvnow();

  for(i=0; data->state.connc && (i< data->state.connc->num); i++) {
    conn = data->state.connc->connects[i];

    if(!conn || conn->inuse)
      continue;

    /* Set higher score for the age passed since the connection was used */
    score = Curl_tvdiff(now, conn->now);

    if(score > highscore) {
      highscore = score;
      connindex = i;
    }
  }
  if(connindex >= 0) {
    /* Set the connection's owner correctly */
    conn = data->state.connc->connects[connindex];
    conn->data = data;

    /* the winner gets the honour of being disconnected */
    (void)Curl_disconnect(conn);

    /* clean the array entry */
    data->state.connc->connects[connindex] = NULL;
  }

  return connindex; /* return the available index or -1 */
}

/* this connection can now be marked 'idle' */
static void
ConnectionDone(struct connectdata *conn)
{
  conn->inuse = FALSE;
  if (!conn->send_pipe && !conn->recv_pipe)
    conn->is_in_pipeline = FALSE;
}

/*
 * The given input connection struct pointer is to be stored. If the "cache"
 * is already full, we must clean out the most suitable using the previously
 * set policy.
 *
 * The given connection should be unique. That must've been checked prior to
 * this call.
 */
static long
ConnectionStore(struct SessionHandle *data,
                struct connectdata *conn)
{
  long i;
  for(i=0; i< data->state.connc->num; i++) {
    if(!data->state.connc->connects[i])
      break;
  }
  if(i == data->state.connc->num) {
    /* there was no room available, kill one */
    i = ConnectionKillOne(data);
    if(-1 != i)
      infof(data, "Connection (#%d) was killed to make room (holds %d)\n",
            i, data->state.connc->num);
    else
      infof(data, "This connection did not fit in the connection cache\n");
  }

  conn->connectindex = i; /* Make the child know where the pointer to this
                             particular data is stored. But note that this -1
                             if this is not within the cache and this is
                             probably not checked for everywhere (yet). */
  conn->inuse = TRUE;
  if(-1 != i) {
    /* Only do this if a true index was returned, if -1 was returned there
       is no room in the cache for an unknown reason and we cannot store
       this there.

       TODO: make sure we really can work with more handles than positions in
       the cache, or possibly we should (allow to automatically) resize the
       connection cache when we add more easy handles to a multi handle!
    */
    data->state.connc->connects[i] = conn; /* fill in this */
    conn->data = data;
  }

  return i;
}

static CURLcode ConnectPlease(struct SessionHandle *data,
                              struct connectdata *conn,
                              struct Curl_dns_entry *hostaddr,
                              bool *connected)
{
  CURLcode result;
  Curl_addrinfo *addr;
#ifndef CURL_DISABLE_VERBOSE_STRINGS
  char *hostname = conn->bits.proxy?conn->proxy.name:conn->host.name;

  infof(data, "About to connect() to %s%s port %d (#%d)\n",
        conn->bits.proxy?"proxy ":"",
        hostname, conn->port, conn->connectindex);
#endif

  /*************************************************************
   * Connect to server/proxy
   *************************************************************/
  result= Curl_connecthost(conn,
                           hostaddr,
                           &conn->sock[FIRSTSOCKET],
                           &addr,
                           connected);
  if(CURLE_OK == result) {
    /* All is cool, then we store the current information */
    conn->dns_entry = hostaddr;
    conn->ip_addr = addr;

    Curl_store_ip_addr(conn);

    switch(data->set.proxytype) {
    case CURLPROXY_SOCKS5:
      result = Curl_SOCKS5(conn->proxyuser, conn->proxypasswd, conn->host.name,
                           conn->remote_port, FIRSTSOCKET, conn);
      break;
    case CURLPROXY_HTTP:
      /* do nothing here. handled later. */
      break;
    case CURLPROXY_SOCKS4:
      result = Curl_SOCKS4(conn->proxyuser, conn->host.name, conn->remote_port,
                           FIRSTSOCKET, conn);
      break;
    default:
      failf(data, "unknown proxytype option given");
      result = CURLE_COULDNT_CONNECT;
      break;
    }
  }
  if(result)
    *connected = FALSE; /* mark it as not connected */

  return result;
}

/*
 * verboseconnect() displays verbose information after a connect
 */
#ifndef CURL_DISABLE_VERBOSE_STRINGS
static void verboseconnect(struct connectdata *conn)
{
  infof(conn->data, "Connected to %s (%s) port %d (#%d)\n",
        conn->bits.proxy ? conn->proxy.dispname : conn->host.dispname,
        conn->ip_addr_str, conn->port, conn->connectindex);
}
#endif

int Curl_protocol_getsock(struct connectdata *conn,
                          curl_socket_t *socks,
                          int numsocks)
{
  if(conn->curl_proto_getsock)
    return conn->curl_proto_getsock(conn, socks, numsocks);
  return GETSOCK_BLANK;
}

int Curl_doing_getsock(struct connectdata *conn,
                       curl_socket_t *socks,
                       int numsocks)
{
  if(conn && conn->curl_doing_getsock)
    return conn->curl_doing_getsock(conn, socks, numsocks);
  return GETSOCK_BLANK;
}

/*
 * We are doing protocol-specific connecting and this is being called over and
 * over from the multi interface until the connection phase is done on
 * protocol layer.
 */

CURLcode Curl_protocol_connecting(struct connectdata *conn,
                                  bool *done)
{
  CURLcode result=CURLE_OK;

  if(conn && conn->curl_connecting) {
    *done = FALSE;
    result = conn->curl_connecting(conn, done);
  }
  else
    *done = TRUE;

  return result;
}

/*
 * We are DOING this is being called over and over from the multi interface
 * until the DOING phase is done on protocol layer.
 */

CURLcode Curl_protocol_doing(struct connectdata *conn, bool *done)
{
  CURLcode result=CURLE_OK;

  if(conn && conn->curl_doing) {
    *done = FALSE;
    result = conn->curl_doing(conn, done);
  }
  else
    *done = TRUE;

  return result;
}

/*
 * We have discovered that the TCP connection has been successful, we can now
 * proceed with some action.
 *
 */
CURLcode Curl_protocol_connect(struct connectdata *conn,
                               bool *protocol_done)
{
  CURLcode result=CURLE_OK;
  struct SessionHandle *data = conn->data;

  *protocol_done = FALSE;

  if(conn->bits.tcpconnect && conn->bits.protoconnstart) {
    /* We already are connected, get back. This may happen when the connect
       worked fine in the first call, like when we connect to a local server
       or proxy. Note that we don't know if the protocol is actually done.

       Unless this protocol doesn't have any protocol-connect callback, as
       then we know we're done. */
    if(!conn->curl_connecting)
      *protocol_done = TRUE;

    return CURLE_OK;
  }

  if(!conn->bits.tcpconnect) {

    Curl_pgrsTime(data, TIMER_CONNECT); /* connect done */

    if(data->set.verbose)
      verboseconnect(conn);
  }

  if(!conn->bits.protoconnstart) {
    if(conn->curl_connect) {
      /* is there a protocol-specific connect() procedure? */

      /* Set start time here for timeout purposes in the connect procedure, it
         is later set again for the progress meter purpose */
      conn->now = Curl_tvnow();

      /* Call the protocol-specific connect function */
      result = conn->curl_connect(conn, protocol_done);
    }
    else
      *protocol_done = TRUE;

    /* it has started, possibly even completed but that knowledge isn't stored
       in this bit! */
    if (!result)
      conn->bits.protoconnstart = TRUE;
  }

  return result; /* pass back status */
}

/*
 * Helpers for IDNA convertions.
 */
#ifdef USE_LIBIDN
static bool is_ASCII_name(const char *hostname)
{
  const unsigned char *ch = (const unsigned char*)hostname;

  while (*ch) {
    if (*ch++ & 0x80)
      return FALSE;
  }
  return TRUE;
}

/*
 * Check if characters in hostname is allowed in Top Level Domain.
 */
static bool tld_check_name(struct SessionHandle *data,
                           const char *ace_hostname)
{
  size_t err_pos;
  char *uc_name = NULL;
  int rc;
#ifndef CURL_DISABLE_VERBOSE_STRINGS
  char *tld_errmsg = (char *)"<no msg>";
#else
  (void)data;
#endif

  /* Convert (and downcase) ACE-name back into locale's character set */
  rc = idna_to_unicode_lzlz(ace_hostname, &uc_name, 0);
  if (rc != IDNA_SUCCESS)
    return (FALSE);

  rc = tld_check_lz(uc_name, &err_pos, NULL);
#ifndef CURL_DISABLE_VERBOSE_STRINGS
#ifdef HAVE_TLD_STRERROR
  if (rc != TLD_SUCCESS)
    tld_errmsg = (char *)tld_strerror((Tld_rc)rc);
#endif
  if (rc == TLD_INVALID)
    infof(data, "WARNING: %s; pos %u = `%c'/0x%02X\n",
          tld_errmsg, err_pos, uc_name[err_pos],
          uc_name[err_pos] & 255);
  else if (rc != TLD_SUCCESS)
    infof(data, "WARNING: TLD check for %s failed; %s\n",
          uc_name, tld_errmsg);
#endif /* CURL_DISABLE_VERBOSE_STRINGS */
  if (uc_name)
     idn_free(uc_name);
  return (bool)(rc == TLD_SUCCESS);
}
#endif

static void fix_hostname(struct SessionHandle *data,
                         struct connectdata *conn, struct hostname *host)
{
#ifndef USE_LIBIDN
  (void)data;
  (void)conn;
#elif defined(CURL_DISABLE_VERBOSE_STRINGS)
  (void)conn;
#endif

  /* set the name we use to display the host name */
  host->dispname = host->name;

#ifdef USE_LIBIDN
  /*************************************************************
   * Check name for non-ASCII and convert hostname to ACE form.
   *************************************************************/
  if (!is_ASCII_name(host->name) &&
      stringprep_check_version(LIBIDN_REQUIRED_VERSION)) {
    char *ace_hostname = NULL;
    int rc = idna_to_ascii_lz(host->name, &ace_hostname, 0);
    infof (data, "Input domain encoded as `%s'\n",
           stringprep_locale_charset ());
    if (rc != IDNA_SUCCESS)
      infof(data, "Failed to convert %s to ACE; %s\n",
            host->name, Curl_idn_strerror(conn,rc));
    else {
      /* tld_check_name() displays a warning if the host name contains
         "illegal" characters for this TLD */
      (void)tld_check_name(data, ace_hostname);

      host->encalloc = ace_hostname;
      /* change the name pointer to point to the encoded hostname */
      host->name = host->encalloc;
    }
  }
#endif
}

/*
 * Parse URL and fill in the relevant members of the connection struct.
 */
static CURLcode ParseURLAndFillConnection(struct SessionHandle *data,
                                          struct connectdata *conn)
{
  char *at;
  char *tmp;

  char *path = data->reqdata.path;

  /*************************************************************
   * Parse the URL.
   *
   * We need to parse the url even when using the proxy, because we will need
   * the hostname and port in case we are trying to SSL connect through the
   * proxy -- and we don't know if we will need to use SSL until we parse the
   * url ...
   ************************************************************/
  if((2 == sscanf(data->change.url, "%15[^:]:%[^\n]",
                  conn->protostr,
                  path)) && strequal(conn->protostr, "file")) {
    if(path[0] == '/' && path[1] == '/') {
      /* Allow omitted hostname (e.g. file:/<path>).  This is not strictly
       * speaking a valid file: URL by RFC 1738, but treating file:/<path> as
       * file://localhost/<path> is similar to how other schemes treat missing
       * hostnames.  See RFC 1808. */

      /* This cannot be done with strcpy() in a portable manner, since the
         memory areas overlap! */
      memmove(path, path + 2, strlen(path + 2)+1);
    }
    /*
     * we deal with file://<host>/<path> differently since it supports no
     * hostname other than "localhost" and "127.0.0.1", which is unique among
     * the URL protocols specified in RFC 1738
     */
    if(path[0] != '/') {
      /* the URL included a host name, we ignore host names in file:// URLs
         as the standards don't define what to do with them */
      char *ptr=strchr(path, '/');
      if(ptr) {
        /* there was a slash present

           RFC1738 (section 3.1, page 5) says:

           The rest of the locator consists of data specific to the scheme,
           and is known as the "url-path". It supplies the details of how the
           specified resource can be accessed. Note that the "/" between the
           host (or port) and the url-path is NOT part of the url-path.

           As most agents use file://localhost/foo to get '/foo' although the
           slash preceding foo is a separator and not a slash for the path,
           a URL as file://localhost//foo must be valid as well, to refer to
           the same file with an absolute path.
        */

        if(ptr[1] && ('/' == ptr[1]))
          /* if there was two slashes, we skip the first one as that is then
             used truly as a separator */
          ptr++;

        /* This cannot be made with strcpy, as the memory chunks overlap! */
        memmove(path, ptr, strlen(ptr)+1);
      }
    }

    strcpy(conn->protostr, "file"); /* store protocol string lowercase */
  }
  else {
    /* clear path */
    path[0]=0;

    if (2 > sscanf(data->change.url,
                   "%15[^\n:]://%[^\n/]%[^\n]",
                   conn->protostr,
                   conn->host.name, path)) {

      /*
       * The URL was badly formatted, let's try the browser-style _without_
       * protocol specified like 'http://'.
       */
      if((1 > sscanf(data->change.url, "%[^\n/]%[^\n]",
                     conn->host.name, path)) ) {
        /*
         * We couldn't even get this format.
         */
        failf(data, "<url> malformed");
        return CURLE_URL_MALFORMAT;
      }

      /*
       * Since there was no protocol part specified, we guess what protocol it
       * is based on the first letters of the server name.
       */

      /* Note: if you add a new protocol, please update the list in
       * lib/version.c too! */

      if(checkprefix("FTP.", conn->host.name))
        strcpy(conn->protostr, "ftp");
      else if (checkprefix("DICT.", conn->host.name))
        strcpy(conn->protostr, "DICT");
      else if (checkprefix("LDAP.", conn->host.name))
        strcpy(conn->protostr, "LDAP");
      else {
        strcpy(conn->protostr, "http");
      }

      conn->protocol |= PROT_MISSING; /* not given in URL */
    }
  }

  /* We search for '?' in the host name (but only on the right side of a
   * @-letter to allow ?-letters in username and password) to handle things
   * like http://example.com?param= (notice the missing '/').
   */
  at = strchr(conn->host.name, '@');
  if(at)
    tmp = strchr(at+1, '?');
  else
    tmp = strchr(conn->host.name, '?');

  if(tmp) {
    /* We must insert a slash before the '?'-letter in the URL. If the URL had
       a slash after the '?', that is where the path currently begins and the
       '?string' is still part of the host name.

       We must move the trailing part from the host name and put it first in
       the path. And have it all prefixed with a slash.
    */

    size_t hostlen = strlen(tmp);
    size_t pathlen = strlen(path);

    /* move the existing path plus the zero byte forward, to make room for
       the host-name part */
    memmove(path+hostlen+1, path, pathlen+1);

     /* now copy the trailing host part in front of the existing path */
    memcpy(path+1, tmp, hostlen);

    path[0]='/'; /* prepend the missing slash */

    *tmp=0; /* now cut off the hostname at the ? */
  }
  else if(!path[0]) {
    /* if there's no path set, use a single slash */
    strcpy(path, "/");
  }

  /* If the URL is malformatted (missing a '/' after hostname before path) we
   * insert a slash here. The only letter except '/' we accept to start a path
   * is '?'.
   */
  if(path[0] == '?') {
    /* We need this function to deal with overlapping memory areas. We know
       that the memory area 'path' points to is 'urllen' bytes big and that
       is bigger than the path. Use +1 to move the zero byte too. */
    memmove(&path[1], path, strlen(path)+1);
    path[0] = '/';
  }

  /*
   * So if the URL was A://B/C,
   *   conn->protostr is A
   *   conn->host.name is B
   *   data->reqdata.path is /C
   */

  return CURLE_OK;
}

static void llist_dtor(void *user, void *element)
{
  (void)user;
  (void)element;
  /* Do nothing */
}

static CURLcode setup_range(struct SessionHandle *data)
{
  /*
   * If we're doing a resumed transfer, we need to setup our stuff
   * properly.
   */
  struct HandleData *req = &data->reqdata;

  req->resume_from = data->set.set_resume_from;
  if (req->resume_from || data->set.str[STRING_SET_RANGE]) {
    if (req->rangestringalloc == TRUE)
      free(req->range);

    if(req->resume_from)
      req->range = aprintf("%" FORMAT_OFF_T "-", req->resume_from);
    else
      req->range = strdup(data->set.str[STRING_SET_RANGE]);

    req->rangestringalloc = req->range?TRUE:FALSE;

    if(!req->range)
      return CURLE_OUT_OF_MEMORY;

    /* tell ourselves to fetch this range */
    req->use_range = TRUE;        /* enable range download */
  }
  else
    req->use_range = FALSE; /* disable range download */

  return CURLE_OK;
}


/***************************************************************
* Setup connection internals specific to the requested protocol
***************************************************************/
static CURLcode setup_connection_internals(struct SessionHandle *data,
					   struct connectdata *conn)
{
  conn->socktype = SOCK_STREAM; /* most of them are TCP streams */

  if (strequal(conn->protostr, "HTTP")) {
#ifndef CURL_DISABLE_HTTP
    conn->port = PORT_HTTP;
    conn->remote_port = PORT_HTTP;
    conn->protocol |= PROT_HTTP;
    conn->curl_do = Curl_http;
    conn->curl_do_more = (Curl_do_more_func)ZERO_NULL;
    conn->curl_done = Curl_http_done;
    conn->curl_connect = Curl_http_connect;
#else
    failf(data, LIBCURL_NAME
          " was built with HTTP disabled, http: not supported!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

  else if (strequal(conn->protostr, "HTTPS")) {
#if defined(USE_SSL) && !defined(CURL_DISABLE_HTTP)

    conn->port = PORT_HTTPS;
    conn->remote_port = PORT_HTTPS;
    conn->protocol |= PROT_HTTP|PROT_HTTPS|PROT_SSL;

    conn->curl_do = Curl_http;
    conn->curl_do_more = (Curl_do_more_func)ZERO_NULL;
    conn->curl_done = Curl_http_done;
    conn->curl_connect = Curl_http_connect;
    conn->curl_connecting = Curl_https_connecting;
    conn->curl_proto_getsock = Curl_https_getsock;

#else /* USE_SSL */
    failf(data, LIBCURL_NAME
          " was built with SSL disabled, https: not supported!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif /* !USE_SSL */
  }

  else if(strequal(conn->protostr, "FTP") ||
          strequal(conn->protostr, "FTPS")) {

#ifndef CURL_DISABLE_FTP
    char *type;
    int port = PORT_FTP;

    if(strequal(conn->protostr, "FTPS")) {
#ifdef USE_SSL
      conn->protocol |= PROT_FTPS|PROT_SSL;
      /* send data securely unless specifically requested otherwise */
      conn->ssl[SECONDARYSOCKET].use = data->set.ftp_ssl != CURLFTPSSL_CONTROL;
      port = PORT_FTPS;
#else
      failf(data, LIBCURL_NAME
            " was built with SSL disabled, ftps: not supported!");
      return CURLE_UNSUPPORTED_PROTOCOL;
#endif /* !USE_SSL */
    }

    conn->port = port;
    conn->remote_port = (unsigned short)port;
    conn->protocol |= PROT_FTP;

    if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
      /* Unless we have asked to tunnel ftp operations through the proxy, we
         switch and use HTTP operations only */
#ifndef CURL_DISABLE_HTTP
      conn->curl_do = Curl_http;
      conn->curl_done = Curl_http_done;
      conn->protocol = PROT_HTTP; /* switch to HTTP */
#else
      failf(data, "FTP over http proxy requires HTTP support built-in!");
      return CURLE_UNSUPPORTED_PROTOCOL;
#endif
    }
    else {
      conn->curl_do = Curl_ftp;
      conn->curl_do_more = Curl_ftp_nextconnect;
      conn->curl_done = Curl_ftp_done;
      conn->curl_connect = Curl_ftp_connect;
      conn->curl_connecting = Curl_ftp_multi_statemach;
      conn->curl_doing = Curl_ftp_doing;
      conn->curl_proto_getsock = Curl_ftp_getsock;
      conn->curl_doing_getsock = Curl_ftp_getsock;
      conn->curl_disconnect = Curl_ftp_disconnect;
    }

    data->reqdata.path++; /* don't include the initial slash */

    /* FTP URLs support an extension like ";type=<typecode>" that
     * we'll try to get now! */
    type=strstr(data->reqdata.path, ";type=");
    if(!type) {
      type=strstr(conn->host.rawalloc, ";type=");
    }
    if(type) {
      char command;
      *type=0;                     /* it was in the middle of the hostname */
      command = (char)toupper((int)type[6]);
      switch(command) {
      case 'A': /* ASCII mode */
        data->set.prefer_ascii = TRUE;
        break;
      case 'D': /* directory mode */
        data->set.ftp_list_only = TRUE;
        break;
      case 'I': /* binary mode */
      default:
        /* switch off ASCII */
        data->set.prefer_ascii = FALSE;
        break;
      }
    }
#else /* CURL_DISABLE_FTP */
    failf(data, LIBCURL_NAME
          " was built with FTP disabled, ftp/ftps: not supported!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

  else if(strequal(conn->protostr, "TELNET")) {
#ifndef CURL_DISABLE_TELNET
    /* telnet testing factory */
    conn->protocol |= PROT_TELNET;

    conn->port = PORT_TELNET;
    conn->remote_port = PORT_TELNET;
    conn->curl_do = Curl_telnet;
    conn->curl_done = Curl_telnet_done;
#else
    failf(data, LIBCURL_NAME
          " was built with TELNET disabled!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

  else if (strequal(conn->protostr, "DICT")) {
#ifndef CURL_DISABLE_DICT
    conn->protocol |= PROT_DICT;
    conn->port = PORT_DICT;
    conn->remote_port = PORT_DICT;
    conn->curl_do = Curl_dict;
    /* no DICT-specific done */
    conn->curl_done = (Curl_done_func)ZERO_NULL;
#else
    failf(data, LIBCURL_NAME
          " was built with DICT disabled!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

  else if (strequal(conn->protostr, "LDAP")) {
#ifndef CURL_DISABLE_LDAP
    conn->protocol |= PROT_LDAP;
    conn->port = PORT_LDAP;
    conn->remote_port = PORT_LDAP;
    conn->curl_do = Curl_ldap;
    /* no LDAP-specific done */
    conn->curl_done = (Curl_done_func)ZERO_NULL;
#else
    failf(data, LIBCURL_NAME
          " was built with LDAP disabled!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

#ifdef HAVE_LDAP_SSL
  else if (strequal(conn->protostr, "LDAPS")) {
#ifndef CURL_DISABLE_LDAP
    conn->protocol |= PROT_LDAP|PROT_SSL;
    conn->port = PORT_LDAPS;
    conn->remote_port = PORT_LDAPS;
    conn->curl_do = Curl_ldap;
    /* no LDAP-specific done */
    conn->curl_done = (Curl_done_func)ZERO_NULL;
#else
    failf(data, LIBCURL_NAME
          " was built with LDAP disabled!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }
#endif /* CURL_LDAP_USE_SSL */

  else if (strequal(conn->protostr, "FILE")) {
#ifndef CURL_DISABLE_FILE
    conn->protocol |= PROT_FILE;

    conn->curl_do = Curl_file;
    conn->curl_done = Curl_file_done;
#else
    failf(data, LIBCURL_NAME
          " was built with FILE disabled!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

  else if (strequal(conn->protostr, "TFTP")) {
#ifndef CURL_DISABLE_TFTP
    char *type;
    conn->socktype = SOCK_DGRAM; /* UDP datagram based */
    conn->protocol |= PROT_TFTP;
    conn->port = PORT_TFTP;
    conn->remote_port = PORT_TFTP;
    conn->curl_connect = Curl_tftp_connect;
    conn->curl_do = Curl_tftp;
    conn->curl_done = Curl_tftp_done;
    /* TFTP URLs support an extension like ";mode=<typecode>" that
     * we'll try to get now! */
    type=strstr(data->reqdata.path, ";mode=");
    if(!type) {
      type=strstr(conn->host.rawalloc, ";mode=");
    }
    if(type) {
      char command;
      *type=0;                     /* it was in the middle of the hostname */
      command = (char)toupper((int)type[6]);
      switch(command) {
      case 'A': /* ASCII mode */
      case 'N': /* NETASCII mode */
        data->set.prefer_ascii = TRUE;
        break;
      case 'O': /* octet mode */
      case 'I': /* binary mode */
      default:
        /* switch off ASCII */
        data->set.prefer_ascii = FALSE;
        break;
      }
    }
#else
    failf(data, LIBCURL_NAME
          " was built with TFTP disabled!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

  else if (strequal(conn->protostr, "SCP")) {
#ifdef USE_LIBSSH2
    conn->port = PORT_SSH;
    conn->remote_port = PORT_SSH;
    conn->protocol = PROT_SCP;
    conn->curl_connect = Curl_ssh_connect; /* ssh_connect? */
    conn->curl_do = Curl_scp_do;
    conn->curl_done = Curl_scp_done;
    conn->curl_connecting = Curl_ssh_multi_statemach;
    conn->curl_doing = Curl_scp_doing;
    conn->curl_do_more = (Curl_do_more_func)ZERO_NULL;
#else
    failf(data, LIBCURL_NAME
          " was built without LIBSSH2, scp: not supported!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

  else if (strequal(conn->protostr, "SFTP")) {
#ifdef USE_LIBSSH2
    conn->port = PORT_SSH;
    conn->remote_port = PORT_SSH;
    conn->protocol = PROT_SFTP;
    conn->curl_connect = Curl_ssh_connect; /* ssh_connect? */
    conn->curl_do = Curl_sftp_do;
    conn->curl_done = Curl_sftp_done;
    conn->curl_connecting = Curl_ssh_multi_statemach;
    conn->curl_doing = Curl_sftp_doing;
    conn->curl_do_more = (Curl_do_more_func)ZERO_NULL;
#else
    failf(data, LIBCURL_NAME
          " was built without LIBSSH2, scp: not supported!");
    return CURLE_UNSUPPORTED_PROTOCOL;
#endif
  }

  else {
    /* We fell through all checks and thus we don't support the specified
       protocol */
    failf(data, "Unsupported protocol: %s", conn->protostr);
    return CURLE_UNSUPPORTED_PROTOCOL;
  }
  return CURLE_OK;
}

/****************************************************************
* Detect what (if any) proxy to use. Remember that this selects a host
* name and is not limited to HTTP proxies only.
* The returned pointer must be freed by the caller (unless NULL)
****************************************************************/
static char *detect_proxy(struct connectdata *conn)
{
  char *proxy = NULL;

#ifndef CURL_DISABLE_HTTP
  /* If proxy was not specified, we check for default proxy environment
   * variables, to enable i.e Lynx compliance:
   *
   * http_proxy=http://some.server.dom:port/
   * https_proxy=http://some.server.dom:port/
   * ftp_proxy=http://some.server.dom:port/
   * no_proxy=domain1.dom,host.domain2.dom
   *   (a comma-separated list of hosts which should
   *   not be proxied, or an asterisk to override
   *   all proxy variables)
   * all_proxy=http://some.server.dom:port/
   *   (seems to exist for the CERN www lib. Probably
   *   the first to check for.)
   *
   * For compatibility, the all-uppercase versions of these variables are
   * checked if the lowercase versions don't exist.
   */
  char *no_proxy=NULL;
  char *no_proxy_tok_buf;
  char proxy_env[128];

  no_proxy=curl_getenv("no_proxy");
  if(!no_proxy)
    no_proxy=curl_getenv("NO_PROXY");

  if(!no_proxy || !strequal("*", no_proxy)) {
    /* NO_PROXY wasn't specified or it wasn't just an asterisk */
    char *nope;

    nope=no_proxy?strtok_r(no_proxy, ", ", &no_proxy_tok_buf):NULL;
    while(nope) {
      size_t namelen;
      char *endptr = strchr(conn->host.name, ':');
      if(endptr)
	namelen=endptr-conn->host.name;
      else
	namelen=strlen(conn->host.name);

      if(strlen(nope) <= namelen) {
	char *checkn=
	  conn->host.name + namelen - strlen(nope);
	if(checkprefix(nope, checkn)) {
	  /* no proxy for this host! */
	  break;
	}
      }
      nope=strtok_r(NULL, ", ", &no_proxy_tok_buf);
    }
    if(!nope) {
      /* It was not listed as without proxy */
      char *protop = conn->protostr;
      char *envp = proxy_env;
      char *prox;

      /* Now, build <protocol>_proxy and check for such a one to use */
      while(*protop)
	*envp++ = (char)tolower((int)*protop++);

      /* append _proxy */
      strcpy(envp, "_proxy");

      /* read the protocol proxy: */
      prox=curl_getenv(proxy_env);

      /*
       * We don't try the uppercase version of HTTP_PROXY because of
       * security reasons:
       *
       * When curl is used in a webserver application
       * environment (cgi or php), this environment variable can
       * be controlled by the web server user by setting the
       * http header 'Proxy:' to some value.
       *
       * This can cause 'internal' http/ftp requests to be
       * arbitrarily redirected by any external attacker.
       */
      if(!prox && !strequal("http_proxy", proxy_env)) {
	/* There was no lowercase variable, try the uppercase version: */
	for(envp = proxy_env; *envp; envp++)
	  *envp = (char)toupper((int)*envp);
	prox=curl_getenv(proxy_env);
      }

      if(prox && *prox) { /* don't count "" strings */
	proxy = prox; /* use this */
      }
      else {
	proxy = curl_getenv("all_proxy"); /* default proxy to use */
	if(!proxy)
	  proxy=curl_getenv("ALL_PROXY");
      }

      if(proxy && *proxy) {
	long bits = conn->protocol & (PROT_HTTPS|PROT_SSL|PROT_MISSING);

	if(conn->proxytype == CURLPROXY_HTTP) {
	  /* force this connection's protocol to become HTTP */
	  conn->protocol = PROT_HTTP | bits;
	  conn->bits.httpproxy = TRUE;
	}
      }
    } /* if (!nope) - it wasn't specified non-proxy */
  } /* NO_PROXY wasn't specified or '*' */
  if(no_proxy)
    free(no_proxy);

#else /* !CURL_DISABLE_HTTP */

  (void)conn;
#endif /* CURL_DISABLE_HTTP */

  return proxy;
}

/* If this is supposed to use a proxy, we need to figure out the proxy
 * host name, so that we can re-use an existing connection
 * that may exist registered to the same proxy host.
 * proxy will be freed before this function returns.
 */
static CURLcode parse_proxy(struct SessionHandle *data,
                            struct connectdata *conn, char *proxy)
{
  char *prox_portno;
  char *endofprot;

  /* We use 'proxyptr' to point to the proxy name from now on... */
  char *proxyptr=proxy;
  char *portptr;
  char *atsign;

  /* We do the proxy host string parsing here. We want the host name and the
   * port name. Accept a protocol:// prefix, even though it should just be
   * ignored.
   */

  /* Skip the protocol part if present */
  endofprot=strstr(proxyptr, "://");
  if(endofprot)
    proxyptr = endofprot+3;

  /* Is there a username and password given in this proxy url? */
  atsign = strchr(proxyptr, '@');
  if(atsign) {
    char proxyuser[MAX_CURL_USER_LENGTH];
    char proxypasswd[MAX_CURL_PASSWORD_LENGTH];
    proxypasswd[0] = 0;

    if(1 <= sscanf(proxyptr,
		   "%" MAX_CURL_USER_LENGTH_TXT"[^:]:"
		   "%" MAX_CURL_PASSWORD_LENGTH_TXT "[^@]",
		   proxyuser, proxypasswd)) {
      CURLcode res = CURLE_OK;

      /* found user and password, rip them out.  note that we are
	 unescaping them, as there is otherwise no way to have a
	 username or password with reserved characters like ':' in
	 them. */
      Curl_safefree(conn->proxyuser);
      conn->proxyuser = curl_easy_unescape(data, proxyuser, 0, NULL);

      if(!conn->proxyuser)
	res = CURLE_OUT_OF_MEMORY;
      else {
	Curl_safefree(conn->proxypasswd);
	conn->proxypasswd = curl_easy_unescape(data, proxypasswd, 0, NULL);

	if(!conn->proxypasswd)
	  res = CURLE_OUT_OF_MEMORY;
      }

      if(CURLE_OK == res) {
	conn->bits.proxy_user_passwd = TRUE; /* enable it */
	atsign = strdup(atsign+1); /* the right side of the @-letter */

	if(atsign) {
	  free(proxy); /* free the former proxy string */
	  proxy = proxyptr = atsign; /* now use this instead */
	}
	else
	  res = CURLE_OUT_OF_MEMORY;
      }

      if(res) {
	free(proxy); /* free the allocated proxy string */
	return res;
      }
    }
  }

  /* start scanning for port number at this point */
  portptr = proxyptr;

  /* detect and extract RFC2732-style IPv6-addresses */
  if(*proxyptr == '[') {
    char *ptr = ++proxyptr; /* advance beyond the initial bracket */
    while(*ptr && (ISXDIGIT(*ptr) || (*ptr == ':')))
      ptr++;
    if(*ptr == ']') {
      /* yeps, it ended nicely with a bracket as well */
      *ptr = 0;
      portptr = ptr+1;
    }
    /* Note that if this didn't end with a bracket, we still advanced the
     * proxyptr first, but I can't see anything wrong with that as no host
     * name nor a numeric can legally start with a bracket.
     */
  }

  /* Get port number off proxy.server.com:1080 */
  prox_portno = strchr(portptr, ':');
  if (prox_portno) {
    *prox_portno = 0x0; /* cut off number from host name */
    prox_portno ++;
    /* now set the local port number */
    conn->port = atoi(prox_portno);
  }
  else if(data->set.proxyport) {
    /* None given in the proxy string, then get the default one if it is
       given */
    conn->port = data->set.proxyport;
  }

  /* now, clone the cleaned proxy host name */
  conn->proxy.rawalloc = strdup(proxyptr);
  conn->proxy.name = conn->proxy.rawalloc;

  free(proxy);
  if(!conn->proxy.rawalloc)
    return CURLE_OUT_OF_MEMORY;

  return CURLE_OK;
}

/* Extract the user and password from the authentication string */
static CURLcode parse_proxy_auth(struct SessionHandle *data, struct connectdata *conn)
{
  char proxyuser[MAX_CURL_USER_LENGTH]="";
  char proxypasswd[MAX_CURL_PASSWORD_LENGTH]="";

  sscanf(data->set.str[STRING_PROXYUSERPWD],
	 "%" MAX_CURL_USER_LENGTH_TXT "[^:]:"
	 "%" MAX_CURL_PASSWORD_LENGTH_TXT "[^\n]",
	 proxyuser, proxypasswd);

  conn->proxyuser = curl_easy_unescape(data, proxyuser, 0, NULL);
  if(!conn->proxyuser)
    return CURLE_OUT_OF_MEMORY;

  conn->proxypasswd = curl_easy_unescape(data, proxypasswd, 0, NULL);
  if(!conn->proxypasswd)
    return CURLE_OUT_OF_MEMORY;

  return CURLE_OK;
}

/**
 * CreateConnection() sets up a new connectdata struct, or re-uses an already
 * existing one, and resolves host name.
 *
 * if this function returns CURLE_OK and *async is set to TRUE, the resolve
 * response will be coming asynchronously. If *async is FALSE, the name is
 * already resolved.
 *
 * @param data The sessionhandle pointer
 * @param in_connect is set to the next connection data pointer
 * @param addr is set to the new dns entry for this connection. If this
 *        connection is re-used it will be NULL.
 * @param async is set TRUE/FALSE depending on the nature of this lookup
 * @return CURLcode
 * @see SetupConnection()
 *
 * *NOTE* this function assigns the conn->data pointer!
 */

static CURLcode CreateConnection(struct SessionHandle *data,
                                 struct connectdata **in_connect,
                                 struct Curl_dns_entry **addr,
                                 bool *async)
{

  char *tmp;
  CURLcode result=CURLE_OK;
  struct connectdata *conn;
  struct connectdata *conn_temp = NULL;
  size_t urllen;
  struct Curl_dns_entry *hostaddr;
#if defined(HAVE_ALARM) && !defined(USE_ARES)
  unsigned int prev_alarm=0;
#endif
  char endbracket;
  char user[MAX_CURL_USER_LENGTH];
  char passwd[MAX_CURL_PASSWORD_LENGTH];
  int rc;
  bool reuse;
  char *proxy = NULL;

#ifndef USE_ARES
#ifdef SIGALRM
#ifdef HAVE_SIGACTION
  struct sigaction keep_sigact;   /* store the old struct here */
  bool keep_copysig=FALSE;        /* did copy it? */
#else
#ifdef HAVE_SIGNAL
  void (*keep_sigact)(int);       /* store the old handler here */
#endif /* HAVE_SIGNAL */
#endif /* HAVE_SIGACTION */
#endif /* SIGALRM */
#endif /* USE_ARES */

  *addr = NULL; /* nothing yet */
  *async = FALSE;

  /*************************************************************
   * Check input data
   *************************************************************/

  if(!data->change.url)
    return CURLE_URL_MALFORMAT;

  /* First, split up the current URL in parts so that we can use the
     parts for checking against the already present connections. In order
     to not have to modify everything at once, we allocate a temporary
     connection data struct and fill in for comparison purposes. */

  conn = (struct connectdata *)calloc(1, sizeof(struct connectdata));
  if(!conn) {
    *in_connect = NULL; /* clear the pointer */
    return CURLE_OUT_OF_MEMORY;
  }
  /* We must set the return variable as soon as possible, so that our
     parent can cleanup any possible allocs we may have done before
     any failure */
  *in_connect = conn;

  /* and we setup a few fields in case we end up actually using this struct */

  conn->data = data; /* Setup the association between this connection
                        and the SessionHandle */

  conn->sock[FIRSTSOCKET] = CURL_SOCKET_BAD;     /* no file descriptor */
  conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD; /* no file descriptor */
  conn->connectindex = -1;    /* no index */

  conn->proxytype = data->set.proxytype; /* type */
  conn->bits.proxy = (bool)(data->set.str[STRING_PROXY] &&
                            *data->set.str[STRING_PROXY]);
  conn->bits.httpproxy = (bool)(conn->bits.proxy
                                && (conn->proxytype == CURLPROXY_HTTP));


  /* Default protocol-independent behavior doesn't support persistent
     connections, so we set this to force-close. Protocols that support
     this need to set this to FALSE in their "curl_do" functions. */
  conn->bits.close = TRUE;

  conn->readchannel_inuse = FALSE;
  conn->writechannel_inuse = FALSE;

  conn->read_pos = 0;
  conn->buf_len = 0;

  /* Store creation time to help future close decision making */
  conn->created = Curl_tvnow();

  conn->bits.user_passwd = (bool)(NULL != data->set.str[STRING_USERPWD]);
  conn->bits.proxy_user_passwd = (bool)(NULL != data->set.str[STRING_PROXYUSERPWD]);
  conn->bits.no_body = data->set.opt_no_body;
  conn->bits.tunnel_proxy = data->set.tunnel_thru_httpproxy;
  conn->bits.ftp_use_epsv = data->set.ftp_use_epsv;
  conn->bits.ftp_use_eprt = data->set.ftp_use_eprt;

  if (data->multi && Curl_multi_canPipeline(data->multi) &&
      !conn->master_buffer) {
    /* Allocate master_buffer to be used for pipelining */
    conn->master_buffer = calloc(BUFSIZE, sizeof (char));
    if (!conn->master_buffer)
      return CURLE_OUT_OF_MEMORY;
  }

  /* Initialize the pipeline lists */
  conn->send_pipe = Curl_llist_alloc((curl_llist_dtor) llist_dtor);
  conn->recv_pipe = Curl_llist_alloc((curl_llist_dtor) llist_dtor);
  if (!conn->send_pipe || !conn->recv_pipe)
    return CURLE_OUT_OF_MEMORY;

  /* This initing continues below, see the comment "Continue connectdata
   * initialization here" */

  /***********************************************************
   * We need to allocate memory to store the path in. We get the size of the
   * full URL to be sure, and we need to make it at least 256 bytes since
   * other parts of the code will rely on this fact
   ***********************************************************/
#define LEAST_PATH_ALLOC 256
  urllen=strlen(data->change.url);
  if(urllen < LEAST_PATH_ALLOC)
    urllen=LEAST_PATH_ALLOC;

  /* Free the old buffer */
  Curl_safefree(data->reqdata.pathbuffer);

  /*
   * We malloc() the buffers below urllen+2 to make room for to possibilities:
   * 1 - an extra terminating zero
   * 2 - an extra slash (in case a syntax like "www.host.com?moo" is used)
   */

  data->reqdata.pathbuffer=(char *)malloc(urllen+2);
  if(NULL == data->reqdata.pathbuffer)
    return CURLE_OUT_OF_MEMORY; /* really bad error */
  data->reqdata.path = data->reqdata.pathbuffer;

  conn->host.rawalloc=(char *)malloc(urllen+2);
  if(NULL == conn->host.rawalloc)
    return CURLE_OUT_OF_MEMORY;

  conn->host.name = conn->host.rawalloc;
  conn->host.name[0] = 0;

  result = ParseURLAndFillConnection(data, conn);
  if (result != CURLE_OK) {
      return result;
  }

  /*************************************************************
   * Take care of proxy authentication stuff
   *************************************************************/
  if(conn->bits.proxy_user_passwd) {
    result = parse_proxy_auth(data, conn);
    if (result != CURLE_OK)
    	return result;
  }

  /*************************************************************
   * Detect what (if any) proxy to use
   *************************************************************/
  if (data->set.str[STRING_PROXY]) {
    proxy = strdup(data->set.str[STRING_PROXY]);
    /* if global proxy is set, this is it */
    if(NULL == proxy) {
      failf(data, "memory shortage");
      return CURLE_OUT_OF_MEMORY;
    }
  }

  if (!proxy)
    proxy = detect_proxy(conn);
  if (proxy && !*proxy) {
    free(proxy);  /* Don't bother with an empty proxy string */
    proxy = NULL;
  }
  /* proxy must be freed later unless NULL */

  /*************************************************************
   * No protocol part in URL was used, add it!
   *************************************************************/
  if(conn->protocol&PROT_MISSING) {
    /* We're guessing prefixes here and if we're told to use a proxy or if
       we're gonna follow a Location: later or... then we need the protocol
       part added so that we have a valid URL. */
    char *reurl;

    reurl = aprintf("%s://%s", conn->protostr, data->change.url);

    if(!reurl) {
      Curl_safefree(proxy);
      return CURLE_OUT_OF_MEMORY;
    }

    data->change.url = reurl;
    data->change.url_alloc = TRUE; /* free this later */
    conn->protocol &= ~PROT_MISSING; /* switch that one off again */
  }

  /*************************************************************
   * Setup internals depending on protocol
   *************************************************************/
  result = setup_connection_internals(data, conn);
  if (result != CURLE_OK) {
    Curl_safefree(proxy);
    return result;
  }


  /***********************************************************************
   * If this is supposed to use a proxy, we need to figure out the proxy
   * host name, so that we can re-use an existing connection
   * that may exist registered to the same proxy host.
   ***********************************************************************/
  if (proxy) {
    result = parse_proxy(data, conn, proxy);
    /* parse_proxy has freed the proxy string, so don't try to use it again */
    proxy = NULL;
    if (result != CURLE_OK)
      return result;
  }


  /***********************************************************************
   * file: is a special case in that it doesn't need a network connection
   ***********************************************************************/
#ifndef CURL_DISABLE_FILE
  if (strequal(conn->protostr, "FILE")) {
    /* this is supposed to be the connect function so we better at least check
       that the file is present here! */
    result = Curl_file_connect(conn);

    /* Setup a "faked" transfer that'll do nothing */
    if(CURLE_OK == result) {
      conn->data = data;
      conn->bits.tcpconnect = TRUE; /* we are "connected */

      ConnectionStore(data, conn);

      result = setup_range(data);
      if(result) {
        Curl_file_done(conn, result, FALSE);
        return result;
      }

      result = Curl_setup_transfer(conn, -1, -1, FALSE,
                                   NULL, /* no download */
                                   -1, NULL); /* no upload */
    }

    return result;
  }
#endif

  /*************************************************************
   * If the protocol is using SSL and HTTP proxy is used, we set
   * the tunnel_proxy bit.
   *************************************************************/
  if((conn->protocol&PROT_SSL) && conn->bits.httpproxy)
    conn->bits.tunnel_proxy = TRUE;

  /*************************************************************
   * Take care of user and password authentication stuff
   *************************************************************/

  /*
   * Inputs: data->set.userpwd   (CURLOPT_USERPWD)
   *         data->set.fpasswd   (CURLOPT_PASSWDFUNCTION)
   *         data->set.use_netrc (CURLOPT_NETRC)
   *         conn->host.name
   *         netrc file
   *         hard-coded defaults
   *
   * Outputs: (almost :- all currently undefined)
   *          conn->bits.user_passwd  - non-zero if non-default passwords exist
   *          conn->user              - non-zero length if defined
   *          conn->passwd            -   ditto
   *          conn->host.name          - remove user name and password
   */

  /* At this point, we're hoping all the other special cases have
   * been taken care of, so conn->host.name is at most
   *    [user[:password]]@]hostname
   *
   * We need somewhere to put the embedded details, so do that first.
   */

  user[0] =0;   /* to make everything well-defined */
  passwd[0]=0;

  if (conn->protocol & (PROT_FTP|PROT_HTTP|PROT_SCP|PROT_SFTP)) {
    /* This is a FTP, HTTP, SCP or SFTP URL, we will now try to extract the
     * possible user+password pair in a string like:
     * ftp://user:password@ftp.my.site:8021/README */
    char *ptr=strchr(conn->host.name, '@');
    char *userpass = conn->host.name;
    if(ptr != NULL) {
      /* there's a user+password given here, to the left of the @ */

      conn->host.name = ++ptr;

      /* So the hostname is sane.  Only bother interpreting the
       * results if we could care.  It could still be wasted
       * work because it might be overtaken by the programmatically
       * set user/passwd, but doing that first adds more cases here :-(
       */

      if (data->set.use_netrc != CURL_NETRC_REQUIRED) {
        /* We could use the one in the URL */

        conn->bits.user_passwd = 1; /* enable user+password */

        if(*userpass != ':') {
          /* the name is given, get user+password */
          sscanf(userpass, "%" MAX_CURL_USER_LENGTH_TXT "[^:@]:"
                 "%" MAX_CURL_PASSWORD_LENGTH_TXT "[^@]",
                 user, passwd);
        }
        else
          /* no name given, get the password only */
          sscanf(userpass, ":%" MAX_CURL_PASSWORD_LENGTH_TXT "[^@]", passwd);

        if(user[0]) {
          char *newname=curl_easy_unescape(data, user, 0, NULL);
          if(!newname)
            return CURLE_OUT_OF_MEMORY;
          if(strlen(newname) < sizeof(user))
            strcpy(user, newname);

          /* if the new name is longer than accepted, then just use
             the unconverted name, it'll be wrong but what the heck */
          free(newname);
        }
        if (passwd[0]) {
          /* we have a password found in the URL, decode it! */
          char *newpasswd=curl_easy_unescape(data, passwd, 0, NULL);
          if(!newpasswd)
            return CURLE_OUT_OF_MEMORY;
          if(strlen(newpasswd) < sizeof(passwd))
            strcpy(passwd, newpasswd);

          free(newpasswd);
        }
      }
    }
  }

  /*************************************************************
   * Figure out the remote port number
   *
   * No matter if we use a proxy or not, we have to figure out the remote
   * port number of various reasons.
   *
   * To be able to detect port number flawlessly, we must not confuse them
   * IPv6-specified addresses in the [0::1] style. (RFC2732)
   *
   * The conn->host.name is currently [user:passwd@]host[:port] where host
   * could be a hostname, IPv4 address or IPv6 address.
   *************************************************************/
  if((1 == sscanf(conn->host.name, "[%*39[0-9a-fA-F:.]%c", &endbracket)) &&
     (']' == endbracket)) {
    /* this is a RFC2732-style specified IP-address */
    conn->bits.ipv6_ip = TRUE;

    conn->host.name++; /* pass the starting bracket */
    tmp = strchr(conn->host.name, ']');
    *tmp = 0; /* zero terminate */
    tmp++; /* pass the ending bracket */
    if(':' != *tmp)
      tmp = NULL; /* no port number available */
  }
  else
    tmp = strrchr(conn->host.name, ':');

  if(data->set.use_port && data->state.allow_port) {
    /* if set, we use this and ignore the port possibly given in the URL */
    conn->remote_port = (unsigned short)data->set.use_port;
    if(tmp)
      *tmp = '\0'; /* cut off the name there anyway - if there was a port
                      number - since the port number is to be ignored! */
    if(conn->bits.httpproxy) {
      /* we need to create new URL with the new port number */
      char *url;

      url = aprintf("%s://%s:%d%s", conn->protostr, conn->host.name,
                    conn->remote_port, data->reqdata.path);
      if(!url)
        return CURLE_OUT_OF_MEMORY;

      if(data->change.url_alloc)
        free(data->change.url);

      data->change.url = url;
      data->change.url_alloc = TRUE;
    }
  }
  else if (tmp) {
    /* no CURLOPT_PORT given, extract the one from the URL */

    char *rest;
    unsigned long port;

    port=strtoul(tmp+1, &rest, 10);  /* Port number must be decimal */

    if (rest != (tmp+1) && *rest == '\0') {
      /* The colon really did have only digits after it,
       * so it is either a port number or a mistake */

      if (port > 0xffff) {   /* Single unix standard says port numbers are
                              * 16 bits long */
        failf(data, "Port number too large: %lu", port);
        return CURLE_URL_MALFORMAT;
      }

      *tmp = '\0'; /* cut off the name there */
      conn->remote_port = (unsigned short)port;
    }
  }

  /* Programmatically set password:
   *   - always applies, if available
   *   - takes precedence over the values we just set above
   * so scribble it over the top.
   * User-supplied passwords are assumed not to need unescaping.
   *
   * user_password is set in "inherit initial knowledge' above,
   * so it doesn't have to be set in this block
   */
  if (data->set.str[STRING_USERPWD] != NULL) {
    /* the name is given, get user+password */
    sscanf(data->set.str[STRING_USERPWD],
           "%" MAX_CURL_USER_LENGTH_TXT "[^:]:"
           "%" MAX_CURL_PASSWORD_LENGTH_TXT "[^\n]",
           user, passwd);
  }

  conn->bits.netrc = FALSE;
  if (data->set.use_netrc != CURL_NETRC_IGNORED) {
    if(Curl_parsenetrc(conn->host.name,
                       user, passwd,
                       data->set.str[STRING_NETRC_FILE])) {
      infof(data, "Couldn't find host %s in the " DOT_CHAR
            "netrc file, using defaults\n",
            conn->host.name);
    }
    else {
      /* set bits.netrc TRUE to remember that we got the name from a .netrc
         file, so that it is safe to use even if we followed a Location: to a
         different host or similar. */
      conn->bits.netrc = TRUE;

      conn->bits.user_passwd = 1; /* enable user+password */
    }
  }

  /* If our protocol needs a password and we have none, use the defaults */
  if ( (conn->protocol & PROT_FTP) &&
       !conn->bits.user_passwd) {

    conn->user = strdup(CURL_DEFAULT_USER);
    conn->passwd = strdup(CURL_DEFAULT_PASSWORD);
    /* This is the default password, so DON'T set conn->bits.user_passwd */
  }
  else {
    /* store user + password, zero-length if not set */
    conn->user = strdup(user);
    conn->passwd = strdup(passwd);
  }
  if(!conn->user || !conn->passwd)
    return CURLE_OUT_OF_MEMORY;

  /*************************************************************
   * Check the current list of connections to see if we can
   * re-use an already existing one or if we have to create a
   * new one.
   *************************************************************/

  /* Get a cloned copy of the SSL config situation stored in the
     connection struct. But to get this going nicely, we must first make
     sure that the strings in the master copy are pointing to the correct
     strings in the session handle strings array!

     Keep in mind that the pointers in the master copy are pointing to strings
     that will be freed as part of the SessionHandle struct, but all cloned
     copies will be separately allocated.
  */
  data->set.ssl.CApath = data->set.str[STRING_SSL_CAPATH];
  data->set.ssl.CAfile = data->set.str[STRING_SSL_CAFILE];
  data->set.ssl.random_file = data->set.str[STRING_SSL_RANDOM_FILE];
  data->set.ssl.egdsocket = data->set.str[STRING_SSL_EGDSOCKET];
  data->set.ssl.cipher_list = data->set.str[STRING_SSL_CIPHER_LIST];

  if(!Curl_clone_ssl_config(&data->set.ssl, &conn->ssl_config))
    return CURLE_OUT_OF_MEMORY;

  /* reuse_fresh is TRUE if we are told to use a new connection by force, but
     we only acknowledge this option if this is not a re-used connection
     already (which happens due to follow-location or during a HTTP
     authentication phase). */
  if(data->set.reuse_fresh && !data->state.this_is_a_follow)
    reuse = FALSE;
  else
    reuse = ConnectionExists(data, conn, &conn_temp);

  if(reuse) {
    /*
     * We already have a connection for this, we got the former connection
     * in the conn_temp variable and thus we need to cleanup the one we
     * just allocated before we can move along and use the previously
     * existing one.
     */
    struct connectdata *old_conn = conn;

    if(old_conn->proxy.rawalloc)
      free(old_conn->proxy.rawalloc);

    /* free the SSL config struct from this connection struct as this was
       allocated in vain and is targeted for destruction */
    Curl_free_ssl_config(&conn->ssl_config);

    conn = conn_temp;        /* use this connection from now on */

    conn->data = old_conn->data;

    /* get the user+password information from the old_conn struct since it may
     * be new for this request even when we re-use an existing connection */
    conn->bits.user_passwd = old_conn->bits.user_passwd;
    if (conn->bits.user_passwd) {
      /* use the new user namd and password though */
      Curl_safefree(conn->user);
      Curl_safefree(conn->passwd);
      conn->user = old_conn->user;
      conn->passwd = old_conn->passwd;
      old_conn->user = NULL;
      old_conn->passwd = NULL;
    }

    conn->bits.proxy_user_passwd = old_conn->bits.proxy_user_passwd;
    if (conn->bits.proxy_user_passwd) {
      /* use the new proxy user name and proxy password though */
      Curl_safefree(conn->proxyuser);
      Curl_safefree(conn->proxypasswd);
      conn->proxyuser = old_conn->proxyuser;
      conn->proxypasswd = old_conn->proxypasswd;
      old_conn->proxyuser = NULL;
      old_conn->proxypasswd = NULL;
    }

    /* host can change, when doing keepalive with a proxy ! */
    if (conn->bits.proxy) {
      free(conn->host.rawalloc);
      conn->host=old_conn->host;
    }
    else
      free(old_conn->host.rawalloc); /* free the newly allocated name buffer */

    /* get the newly set value, not the old one */
    conn->bits.no_body = old_conn->bits.no_body;

    /* re-use init */
    conn->bits.reuse = TRUE; /* yes, we're re-using here */

    Curl_safefree(old_conn->user);
    Curl_safefree(old_conn->passwd);
    Curl_safefree(old_conn->proxyuser);
    Curl_safefree(old_conn->proxypasswd);
    Curl_llist_destroy(old_conn->send_pipe, NULL);
    Curl_llist_destroy(old_conn->recv_pipe, NULL);
    Curl_safefree(old_conn->master_buffer);

    free(old_conn);          /* we don't need this anymore */

    *in_connect = conn;      /* return this instead! */

    infof(data, "Re-using existing connection! (#%ld) with host %s\n",
          conn->connectindex,
          conn->proxy.name?conn->proxy.dispname:conn->host.dispname);
  }
  else {
    /*
     * This is a brand new connection, so let's store it in the connection
     * cache of ours!
     */
    ConnectionStore(data, conn);
  }

  result = setup_range(data);
  if(result)
    return result;

  /* Continue connectdata initialization here. */

  /*
   *
   * Inherit the proper values from the urldata struct AFTER we have arranged
   * the persistent connection stuff */
  conn->fread_func = data->set.fread_func;
  conn->fread_in = data->set.in;

  if ((conn->protocol&PROT_HTTP) &&
      data->set.upload &&
      (data->set.infilesize == -1) &&
      (data->set.httpversion != CURL_HTTP_VERSION_1_0)) {
    /* HTTP, upload, unknown file size and not HTTP 1.0 */
    conn->bits.upload_chunky = TRUE;
  }
  else {
    /* else, no chunky upload */
    conn->bits.upload_chunky = FALSE;
  }

#ifndef USE_ARES
  /*************************************************************
   * Set timeout if that is being used, and we're not using an asynchronous
   * name resolve.
   *************************************************************/
  if((data->set.timeout || data->set.connecttimeout) && !data->set.no_signal) {
    /*************************************************************
     * Set signal handler to catch SIGALRM
     * Store the old value to be able to set it back later!
     *************************************************************/

#ifdef SIGALRM
#ifdef HAVE_ALARM
    long shortest;
#endif
#ifdef HAVE_SIGACTION
    struct sigaction sigact;
    sigaction(SIGALRM, NULL, &sigact);
    keep_sigact = sigact;
    keep_copysig = TRUE; /* yes, we have a copy */
    sigact.sa_handler = alarmfunc;
#ifdef SA_RESTART
    /* HPUX doesn't have SA_RESTART but defaults to that behaviour! */
    sigact.sa_flags &= ~SA_RESTART;
#endif
    /* now set the new struct */
    sigaction(SIGALRM, &sigact, NULL);
#else /* HAVE_SIGACTION */
    /* no sigaction(), revert to the much lamer signal() */
#ifdef HAVE_SIGNAL
    keep_sigact = signal(SIGALRM, alarmfunc);
#endif
#endif /* HAVE_SIGACTION */

    /* We set the timeout on the name resolving phase first, separately from
     * the download/upload part to allow a maximum time on everything. This is
     * a signal-based timeout, why it won't work and shouldn't be used in
     * multi-threaded environments. */

#ifdef HAVE_ALARM
    shortest = data->set.timeout; /* default to this timeout value */
    if(shortest && data->set.connecttimeout &&
       (data->set.connecttimeout < shortest))
      /* if both are set, pick the shortest */
      shortest = data->set.connecttimeout;
    else if(!shortest)
      /* if timeout is not set, use the connect timeout */
      shortest = data->set.connecttimeout;

    if(shortest < 1000)
      /* the alarm() function only provide integer second resolution, so if
         we want to wait less than one second we must bail out already now. */
      return CURLE_OPERATION_TIMEDOUT;

    /* alarm() makes a signal get sent when the timeout fires off, and that
       will abort system calls */
    prev_alarm = alarm((unsigned int) (shortest ? shortest/1000L : shortest));
    /* We can expect the conn->created time to be "now", as that was just
       recently set in the beginning of this function and nothing slow
       has been done since then until now. */
#endif
#endif /* SIGALRM */
  }
#endif /* USE_ARES */

  /*************************************************************
   * Resolve the name of the server or proxy
   *************************************************************/
  if(conn->bits.reuse) {
    /* re-used connection, no resolving is necessary */
    hostaddr = NULL;
    /* we'll need to clear conn->dns_entry later in Curl_disconnect() */

    if (conn->bits.proxy)
      fix_hostname(data, conn, &conn->host);
  }
  else {
    /* this is a fresh connect */

    /* set a pointer to the hostname we display */
    fix_hostname(data, conn, &conn->host);

    if(!conn->proxy.name || !*conn->proxy.name) {
      /* If not connecting via a proxy, extract the port from the URL, if it is
       * there, thus overriding any defaults that might have been set above. */
      conn->port =  conn->remote_port; /* it is the same port */

      /* Resolve target host right on */
      rc = Curl_resolv(conn, conn->host.name, (int)conn->port, &hostaddr);
      if(rc == CURLRESOLV_PENDING)
        *async = TRUE;

      else if(!hostaddr) {
        failf(data, "Couldn't resolve host '%s'", conn->host.dispname);
        result =  CURLE_COULDNT_RESOLVE_HOST;
        /* don't return yet, we need to clean up the timeout first */
      }
    }
    else {
      /* This is a proxy that hasn't been resolved yet. */

      /* IDN-fix the proxy name */
      fix_hostname(data, conn, &conn->proxy);

      /* resolve proxy */
      rc = Curl_resolv(conn, conn->proxy.name, (int)conn->port, &hostaddr);

      if(rc == CURLRESOLV_PENDING)
        *async = TRUE;

      else if(!hostaddr) {
        failf(data, "Couldn't resolve proxy '%s'", conn->proxy.dispname);
        result = CURLE_COULDNT_RESOLVE_PROXY;
        /* don't return yet, we need to clean up the timeout first */
      }
    }
  }
  *addr = hostaddr;

#if defined(HAVE_ALARM) && defined(SIGALRM) && !defined(USE_ARES)
  if((data->set.timeout || data->set.connecttimeout) && !data->set.no_signal) {
#ifdef HAVE_SIGACTION
    if(keep_copysig) {
      /* we got a struct as it looked before, now put that one back nice
         and clean */
      sigaction(SIGALRM, &keep_sigact, NULL); /* put it back */
    }
#else
#ifdef HAVE_SIGNAL
    /* restore the previous SIGALRM handler */
    signal(SIGALRM, keep_sigact);
#endif
#endif /* HAVE_SIGACTION */

    /* switch back the alarm() to either zero or to what it was before minus
       the time we spent until now! */
    if(prev_alarm) {
      /* there was an alarm() set before us, now put it back */
      unsigned long elapsed_ms = Curl_tvdiff(Curl_tvnow(), conn->created);
      unsigned long alarm_set;

      /* the alarm period is counted in even number of seconds */
      alarm_set = prev_alarm - elapsed_ms/1000;

      if(!alarm_set ||
         ((alarm_set >= 0x80000000) && (prev_alarm < 0x80000000)) ) {
        /* if the alarm time-left reached zero or turned "negative" (counted
           with unsigned values), we should fire off a SIGALRM here, but we
           won't, and zero would be to switch it off so we never set it to
           less than 1! */
        alarm(1);
        result = CURLE_OPERATION_TIMEOUTED;
        failf(data, "Previous alarm fired off!");
      }
      else
        alarm((unsigned int)alarm_set);
    }
    else
      alarm(0); /* just shut it off */
  }
#endif

  return result;
}

/* SetupConnection() is called after the name resolve initiated in
 * CreateConnection() is all done.
 *
 * NOTE: the argument 'hostaddr' is NULL when this function is called for a
 * re-used connection.
 *
 * conn->data MUST already have been setup fine (in CreateConnection)
 */

static CURLcode SetupConnection(struct connectdata *conn,
                                struct Curl_dns_entry *hostaddr,
                                bool *protocol_done)
{
  CURLcode result=CURLE_OK;
  struct SessionHandle *data = conn->data;

  Curl_pgrsTime(data, TIMER_NAMELOOKUP);

  if(conn->protocol & PROT_FILE) {
    /* There's nothing in this function to setup if we're only doing
       a file:// transfer */
    *protocol_done = TRUE;
    return result;
  }
  *protocol_done = FALSE; /* default to not done */

  /* set proxy_connect_closed to false unconditionally already here since it
     is used strictly to provide extra information to a parent function in the
     case of proxy CONNECT failures and we must make sure we don't have it
     lingering set from a previous invoke */
  conn->bits.proxy_connect_closed = FALSE;

  /*************************************************************
   * Set user-agent for HTTP
   *************************************************************/
  if((conn->protocol&PROT_HTTP) && data->set.str[STRING_USERAGENT]) {
    Curl_safefree(conn->allocptr.uagent);
    conn->allocptr.uagent =
      aprintf("User-Agent: %s\r\n", data->set.str[STRING_USERAGENT]);
    if(!conn->allocptr.uagent)
      return CURLE_OUT_OF_MEMORY;
  }

  data->reqdata.keep.headerbytecount = 0;

#ifdef CURL_DO_LINEEND_CONV
  data->state.crlf_conversions = 0; /* reset CRLF conversion counter */
#endif /* CURL_DO_LINEEND_CONV */

  for(;;) {
    /* loop for CURL_SERVER_CLOSED_CONNECTION */

    if(CURL_SOCKET_BAD == conn->sock[FIRSTSOCKET]) {
      bool connected = FALSE;

      /* Connect only if not already connected! */
      result = ConnectPlease(data, conn, hostaddr, &connected);

      if(connected) {
        result = Curl_protocol_connect(conn, protocol_done);
        if(CURLE_OK == result)
          conn->bits.tcpconnect = TRUE;
      }
      else
        conn->bits.tcpconnect = FALSE;

      /* if the connection was closed by the server while exchanging
         authentication informations, retry with the new set
         authentication information */
      if(conn->bits.proxy_connect_closed) {
        /* reset the error buffer */
        if (data->set.errorbuffer)
          data->set.errorbuffer[0] = '\0';
        data->state.errorbuf = FALSE;
        continue;
      }

      if(CURLE_OK != result)
        return result;
    }
    else {
      Curl_pgrsTime(data, TIMER_CONNECT); /* we're connected already */
      conn->bits.tcpconnect = TRUE;
      *protocol_done = TRUE;
      if(data->set.verbose)
        verboseconnect(conn);
    }
    /* Stop the loop now */
    break;
  }

  conn->now = Curl_tvnow(); /* time this *after* the connect is done, we
                               set this here perhaps a second time */

#ifdef __EMX__
  /* 20000330 mgs
   * the check is quite a hack...
   * we're calling _fsetmode to fix the problem with fwrite converting newline
   * characters (you get mangled text files, and corrupted binary files when
   * you download to stdout and redirect it to a file). */

  if ((data->set.out)->_handle == NULL) {
    _fsetmode(stdout, "b");
  }
#endif

  return CURLE_OK;
}

CURLcode Curl_connect(struct SessionHandle *data,
                      struct connectdata **in_connect,
                      bool *asyncp,
                      bool *protocol_done)
{
  CURLcode code;
  struct Curl_dns_entry *dns;

  *asyncp = FALSE; /* assume synchronous resolves by default */

  /* call the stuff that needs to be called */
  code = CreateConnection(data, in_connect, &dns, asyncp);

  if(CURLE_OK == code) {
    /* no error */
    if(dns || !*asyncp)
      /* If an address is available it means that we already have the name
         resolved, OR it isn't async. if this is a re-used connection 'dns'
         will be NULL here. Continue connecting from here */
      code = SetupConnection(*in_connect, dns, protocol_done);
    /* else
       response will be received and treated async wise */
  }

  if(CURLE_OK != code) {
    /* We're not allowed to return failure with memory left allocated
       in the connectdata struct, free those here */
    if(*in_connect) {
      Curl_disconnect(*in_connect); /* close the connection */
      *in_connect = NULL;           /* return a NULL */
    }
  }
  else {
    if ((*in_connect)->is_in_pipeline)
      data->state.is_in_pipeline = TRUE;
  }

  return code;
}

/* Call this function after Curl_connect() has returned async=TRUE and
   then a successful name resolve has been received.

   Note: this function disconnects and frees the conn data in case of
   resolve failure */
CURLcode Curl_async_resolved(struct connectdata *conn,
                             bool *protocol_done)
{
#if defined(USE_ARES) || defined(USE_THREADING_GETHOSTBYNAME) || \
    defined(USE_THREADING_GETADDRINFO)
  CURLcode code = SetupConnection(conn, conn->async.dns, protocol_done);

  if(code)
    /* We're not allowed to return failure with memory left allocated
       in the connectdata struct, free those here */
    Curl_disconnect(conn); /* close the connection */

  return code;
#else
  (void)conn;
  (void)protocol_done;
  return CURLE_OK;
#endif
}


CURLcode Curl_done(struct connectdata **connp,
                   CURLcode status,  /* an error if this is called after an
                                        error was detected */
                   bool premature)
{
  CURLcode result;
  struct connectdata *conn = *connp;
  struct SessionHandle *data = conn->data;

  Curl_expire(data, 0); /* stop timer */

  if(conn->bits.done)
    return CURLE_OK; /* Curl_done() has already been called */

  conn->bits.done = TRUE; /* called just now! */

  if(Curl_removeHandleFromPipeline(data, conn->recv_pipe) &&
     conn->readchannel_inuse)
    conn->readchannel_inuse = FALSE;
  if(Curl_removeHandleFromPipeline(data, conn->send_pipe) &&
     conn->writechannel_inuse)
    conn->writechannel_inuse = FALSE;

  /* Cleanup possible redirect junk */
  if(data->reqdata.newurl) {
    free(data->reqdata.newurl);
    data->reqdata.newurl = NULL;
  }

  if(conn->dns_entry) {
    Curl_resolv_unlock(data, conn->dns_entry); /* done with this */
    conn->dns_entry = NULL;
  }

  /* this calls the protocol-specific function pointer previously set */
  if(conn->curl_done)
    result = conn->curl_done(conn, status, premature);
  else
    result = CURLE_OK;

  Curl_pgrsDone(conn); /* done with the operation */

  /* for ares-using, make sure all possible outstanding requests are properly
     cancelled before we proceed */
  ares_cancel(data->state.areschannel);

  /* if data->set.reuse_forbid is TRUE, it means the libcurl client has
     forced us to close this no matter what we think.

     if conn->bits.close is TRUE, it means that the connection should be
     closed in spite of all our efforts to be nice, due to protocol
     restrictions in our or the server's end */
  if(data->set.reuse_forbid || conn->bits.close) {
    CURLcode res2 = Curl_disconnect(conn); /* close the connection */

    /* If we had an error already, make sure we return that one. But
       if we got a new error, return that. */
    if(!result && res2)
      result = res2;
  }
  else {
    ConnectionDone(conn); /* the connection is no longer in use */

    /* remember the most recently used connection */
    data->state.lastconnect = conn->connectindex;

    infof(data, "Connection #%ld to host %s left intact\n",
          conn->connectindex,
          conn->bits.httpproxy?conn->proxy.dispname:conn->host.dispname);
  }

  *connp = NULL; /* to make the caller of this function better detect that
                    this was either closed or handed over to the connection
                    cache here, and therefore cannot be used from this point on
                 */

  return result;
}

CURLcode Curl_do(struct connectdata **connp, bool *done)
{
  CURLcode result=CURLE_OK;
  struct connectdata *conn = *connp;
  struct SessionHandle *data = conn->data;

  conn->bits.done = FALSE; /* Curl_done() is not called yet */
  conn->bits.do_more = FALSE; /* by default there's no curl_do_more() to use */

  if(conn->curl_do) {
    /* generic protocol-specific function pointer set in curl_connect() */
    result = conn->curl_do(conn, done);

    /* This was formerly done in transfer.c, but we better do it here */

    if((CURLE_SEND_ERROR == result) && conn->bits.reuse) {
      /* This was a re-use of a connection and we got a write error in the
       * DO-phase. Then we DISCONNECT this connection and have another attempt
       * to CONNECT and then DO again! The retry cannot possibly find another
       * connection to re-use, since we only keep one possible connection for
       * each.  */

      infof(data, "Re-used connection seems dead, get a new one\n");

      conn->bits.close = TRUE; /* enforce close of this connection */
      result = Curl_done(&conn, result, FALSE); /* we are so done with this */

      /* conn may no longer be a good pointer */

      /*
       * According to bug report #1330310. We need to check for
       * CURLE_SEND_ERROR here as well. I figure this could happen when the
       * request failed on a FTP connection and thus Curl_done() itself tried
       * to use the connection (again). Slight Lack of feedback in the report,
       * but I don't think this extra check can do much harm.
       */
      if((CURLE_OK == result) || (CURLE_SEND_ERROR == result)) {
        bool async;
        bool protocol_done = TRUE;

        /* Now, redo the connect and get a new connection */
        result = Curl_connect(data, connp, &async, &protocol_done);
        if(CURLE_OK == result) {
          /* We have connected or sent away a name resolve query fine */

          conn = *connp; /* setup conn to again point to something nice */
          if(async) {
            /* Now, if async is TRUE here, we need to wait for the name
               to resolve */
            result = Curl_wait_for_resolv(conn, NULL);
            if(result)
              return result;

            /* Resolved, continue with the connection */
            result = Curl_async_resolved(conn, &protocol_done);
            if(result)
              return result;
          }

          /* ... finally back to actually retry the DO phase */
          result = conn->curl_do(conn, done);
        }
      }
    }
  }
  return result;
}

CURLcode Curl_do_more(struct connectdata *conn)
{
  CURLcode result=CURLE_OK;

  if(conn->curl_do_more)
    result = conn->curl_do_more(conn);

  return result;
}