aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/mod_admin_shell.lua
blob: 43903aa7a259e06a68b3291c9a31f1748affdc24 (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
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
-- luacheck: ignore 212/self

module:set_global();
module:depends("admin_socket");

local hostmanager = require "prosody.core.hostmanager";
local modulemanager = require "prosody.core.modulemanager";
local s2smanager = require "prosody.core.s2smanager";
local portmanager = require "prosody.core.portmanager";
local helpers = require "prosody.util.helpers";
local server = require "prosody.net.server";
local st = require "prosody.util.stanza";

local _G = _G;

local prosody = _G.prosody;

local unpack = table.unpack;
local iterators = require "prosody.util.iterators";
local keys, values = iterators.keys, iterators.values;
local jid_bare, jid_split, jid_join, jid_resource, jid_compare = import("prosody.util.jid", "bare", "prepped_split", "join", "resource", "compare");
local set, array = require "prosody.util.set", require "prosody.util.array";
local cert_verify_identity = require "prosody.util.x509".verify_identity;
local envload = require "prosody.util.envload".envload;
local envloadfile = require "prosody.util.envload".envloadfile;
local has_pposix, pposix = pcall(require, "prosody.util.pposix");
local async = require "prosody.util.async";
local serialization = require "prosody.util.serialization";
local serialize_config = serialization.new ({ fatal = false, unquoted = true});
local time = require "prosody.util.time";
local promise = require "prosody.util.promise";
local logger = require "prosody.util.logger";

local t_insert = table.insert;
local t_concat = table.concat;

local format_number = require "prosody.util.human.units".format;
local format_table = require "prosody.util.human.io".table;

local function capitalize(s)
	if not s then return end
	return (s:gsub("^%a", string.upper):gsub("_", " "));
end

local function pre(prefix, str, alt)
	if type(str) ~= "string" or str == "" then return alt or ""; end
	return prefix .. str;
end

local function suf(str, suffix, alt)
	if type(str) ~= "string" or str == "" then return alt or ""; end
	return str .. suffix;
end

local commands = module:shared("commands")
local def_env = module:shared("env");
local default_env_mt = { __index = def_env };

local function redirect_output(target, session)
	local env = setmetatable({ print = session.print }, { __index = function (_, k) return rawget(target, k); end });
	env.dofile = function(name)
		local f, err = envloadfile(name, env);
		if not f then return f, err; end
		return f();
	end;
	return env;
end

console = {};

local runner_callbacks = {};

function runner_callbacks:error(err)
	module:log("error", "Traceback[shell]: %s", err);

	self.data.print("Fatal error while running command, it did not complete");
	self.data.print("Error: "..tostring(err));
end

local function send_repl_output(session, line, attr)
	return session.send(st.stanza("repl-output", attr):text(tostring(line)));
end

function console:new_session(admin_session)
	local session = {
		send = function (t)
			return send_repl_output(admin_session, t);
		end;
		print = function (...)
			local t = {};
			for i=1,select("#", ...) do
				t[i] = tostring(select(i, ...));
			end
			return send_repl_output(admin_session, table.concat(t, "\t"));
		end;
		write = function (t)
			return send_repl_output(admin_session, t, { eol = "0" });
		end;
		serialize = tostring;
		disconnect = function () admin_session:close(); end;
		is_connected = function ()
			return not not admin_session.conn;
		end
	};
	session.env = setmetatable({}, default_env_mt);

	session.thread = async.runner(function (line)
		console:process_line(session, line);
	end, runner_callbacks, session);

	-- Load up environment with helper objects
	for name, t in pairs(def_env) do
		if type(t) == "table" then
			session.env[name] = setmetatable({ session = session }, { __index = t });
		end
	end

	session.env.output:configure();

	return session;
end

local function handle_line(event)
	local session = event.origin.shell_session;
	if not session then
		session = console:new_session(event.origin);
		event.origin.shell_session = session;
	end

	local default_width = 132; -- The common default of 80 is a bit too narrow for e.g. s2s:show(), 132 was another common width for hardware terminals
	local margin = 2; -- To account for '| ' when lines are printed
	session.width = (tonumber(event.stanza.attr.width) or default_width)-margin;

	local line = event.stanza:get_text();
	local useglobalenv;

	local result = st.stanza("repl-result");

	if line:match("^>") then
		line = line:gsub("^>", "");
		useglobalenv = true;
	else
		local command = line:match("^%w+") or line:match("%p");
		if commands[command] then
			commands[command](session, line);
			event.origin.send(result);
			return;
		end
	end

	session.env._ = line;

	if not useglobalenv and commands[line:lower()] then
		commands[line:lower()](session, line);
		event.origin.send(result);
		return;
	end

	if useglobalenv and not session.globalenv then
		session.globalenv = redirect_output(_G, session);
	end

	local chunkname = "=console";
	local env = (useglobalenv and session.globalenv) or session.env or nil
	-- luacheck: ignore 311/err
	local chunk, err = envload("return "..line, chunkname, env);
	if not chunk then
		chunk, err = envload(line, chunkname, env);
		if not chunk then
			err = err:gsub("^%[string .-%]:%d+: ", "");
			err = err:gsub("^:%d+: ", "");
			err = err:gsub("'<eof>'", "the end of the line");
			result.attr.type = "error";
			result:text("Sorry, I couldn't understand that... "..err);
			event.origin.send(result);
			return;
		end
	end

	local taskok, message = chunk();

	if promise.is_promise(taskok) then
		taskok, message = async.wait_for(taskok);
	end

	if not message then
		if type(taskok) ~= "string" and useglobalenv then
			taskok = session.serialize(taskok);
		end
		result:text("Result: "..tostring(taskok));
	elseif (not taskok) and message then
		result.attr.type = "error";
		result:text("Error: "..tostring(message));
	else
		result:text("OK: "..tostring(message));
	end

	event.origin.send(result);
end

module:hook("admin/repl-input", function (event)
	local ok, err = pcall(handle_line, event);
	if not ok then
		event.origin.send(st.stanza("repl-result", { type = "error" }):text(err));
	end
	return true;
end);

-- Console commands --
-- These are simple commands, not valid standalone in Lua

local available_columns; --forward declaration so it is reachable from the help

function commands.help(session, data)
	local print = session.print;
	local section = data:match("^help (%w+)");
	if not section then
		print [[Commands are divided into multiple sections. For help on a particular section, ]]
		print [[type: help SECTION (for example, 'help c2s'). Sections are: ]]
		print [[]]
		local row = format_table({ { title = "Section", width = 7 }, { title = "Description", width = "100%" } }, session.width)
		print(row())
		print(row { "c2s"; "Commands to manage local client-to-server sessions" })
		print(row { "s2s"; "Commands to manage sessions between this server and others" })
		print(row { "http"; "Commands to inspect HTTP services" }) -- XXX plural but there is only one so far
		print(row { "module"; "Commands to load/reload/unload modules/plugins" })
		print(row { "host"; "Commands to activate, deactivate and list virtual hosts" })
		print(row { "user"; "Commands to create and delete users, and change their passwords" })
		print(row { "roles"; "Show information about user roles" })
		print(row { "muc"; "Commands to create, list and manage chat rooms" })
		print(row { "stats"; "Commands to show internal statistics" })
		print(row { "server"; "Uptime, version, shutting down, etc." })
		print(row { "port"; "Commands to manage ports the server is listening on" })
		print(row { "dns"; "Commands to manage and inspect the internal DNS resolver" })
		print(row { "xmpp"; "Commands for sending XMPP stanzas" })
		print(row { "debug"; "Commands for debugging the server" })
		print(row { "watch"; "Commands for watching live logs from the server" })
		print(row { "config"; "Reloading the configuration, etc." })
		print(row { "columns"; "Information about customizing session listings" })
		print(row { "console"; "Help regarding the console itself" })
	elseif section == "c2s" then
		print [[c2s:show(jid, columns) - Show all client sessions with the specified JID (or all if no JID given)]]
		print [[c2s:show_tls(jid) - Show TLS cipher info for encrypted sessions]]
		print [[c2s:count() - Count sessions without listing them]]
		print [[c2s:close(jid) - Close all sessions for the specified JID]]
		print [[c2s:closeall() - Close all active c2s connections ]]
	elseif section == "s2s" then
		print [[s2s:show(domain, columns) - Show all s2s connections for the given domain (or all if no domain given)]]
		print [[s2s:show_tls(domain) - Show TLS cipher info for encrypted sessions]]
		print [[s2s:close(from, to) - Close a connection from one domain to another]]
		print [[s2s:closeall(host) - Close all the incoming/outgoing s2s sessions to specified host]]
	elseif section == "http" then
		print [[http:list(hosts) - Show HTTP endpoints]]
	elseif section == "module" then
		print [[module:info(module, host) - Show information about a loaded module]]
		print [[module:load(module, host) - Load the specified module on the specified host (or all hosts if none given)]]
		print [[module:reload(module, host) - The same, but unloads and loads the module (saving state if the module supports it)]]
		print [[module:unload(module, host) - The same, but just unloads the module from memory]]
		print [[module:list(host) - List the modules loaded on the specified host]]
	elseif section == "host" then
		print [[host:activate(hostname) - Activates the specified host]]
		print [[host:deactivate(hostname) - Disconnects all clients on this host and deactivates]]
		print [[host:list() - List the currently-activated hosts]]
	elseif section == "user" then
		print [[user:create(jid, password, role) - Create the specified user account]]
		print [[user:password(jid, password) - Set the password for the specified user account]]
		print [[user:roles(jid, host) - Show current roles for an user]]
		print [[user:setrole(jid, host, role) - Set primary role of a user (see 'help roles')]]
		print [[user:addrole(jid, host, role) - Add a secondary role to a user]]
		print [[user:delrole(jid, host, role) - Remove a secondary role from a user]]
		print [[user:disable(jid) - Disable the specified user account, preventing login]]
		print [[user:enable(jid) - Enable the specified user account, restoring login access]]
		print [[user:delete(jid) - Permanently remove the specified user account]]
		print [[user:list(hostname, pattern) - List users on the specified host, optionally filtering with a pattern]]
	elseif section == "roles" then
		print [[Roles may grant access or restrict users from certain operations]]
		print [[Built-in roles are:]]
		print [[  prosody:user     - Normal user (default)]]
		print [[  prosody:admin    - Host administrator]]
		print [[  prosody:operator - Server administrator]]
		print [[]]
		print [[Roles can be assigned using the user management commands (see 'help user').]]
	elseif section == "muc" then
		-- TODO `muc:room():foo()` commands
		print [[muc:create(roomjid, { config }) - Create the specified MUC room with the given config]]
		print [[muc:list(host) - List rooms on the specified MUC component]]
		print [[muc:room(roomjid) - Reference the specified MUC room to access MUC API methods]]
		print [[muc:occupants(roomjid, filter) - List room occupants, optionally filtered on substring or role]]
		print [[muc:affiliations(roomjid, filter) - List affiliated members of the room, optionally filtered on substring or affiliation]]
	elseif section == "server" then
		print [[server:version() - Show the server's version number]]
		print [[server:uptime() - Show how long the server has been running]]
		print [[server:memory() - Show details about the server's memory usage]]
		print [[server:shutdown(reason) - Shut down the server, with an optional reason to be broadcast to all connections]]
	elseif section == "port" then
		print [[port:list() - Lists all network ports prosody currently listens on]]
		print [[port:close(port, interface) - Close a port]]
	elseif section == "dns" then
		print [[dns:lookup(name, type, class) - Do a DNS lookup]]
		print [[dns:addnameserver(nameserver) - Add a nameserver to the list]]
		print [[dns:setnameserver(nameserver) - Replace the list of name servers with the supplied one]]
		print [[dns:purge() - Clear the DNS cache]]
		print [[dns:cache() - Show cached records]]
	elseif section == "xmpp" then
		print [[xmpp:ping(localhost, remotehost) -- Sends a ping to a remote XMPP server and reports the response]]
	elseif section == "config" then
		print [[config:reload() - Reload the server configuration. Modules may need to be reloaded for changes to take effect.]]
		print [[config:get([host,] option) - Show the value of a config option.]]
	elseif section == "stats" then -- luacheck: ignore 542
		print [[stats:show(pattern) - Show internal statistics, optionally filtering by name with a pattern]]
		print [[stats:show():cfgraph() - Show a cumulative frequency graph]]
		print [[stats:show():histogram() - Show a histogram of selected metric]]
	elseif section == "debug" then
		print [[debug:logevents(host) - Enable logging of fired events on host]]
		print [[debug:events(host, event) - Show registered event handlers]]
		print [[debug:timers() - Show information about scheduled timers]]
	elseif section == "watch" then
		print [[watch:log() - Follow debug logs]]
		print [[watch:stanzas(target, filter) - Watch live stanzas matching the specified target and filter]]
	elseif section == "console" then
		print [[Hey! Welcome to Prosody's admin console.]]
		print [[First thing, if you're ever wondering how to get out, simply type 'quit'.]]
		print [[Secondly, note that we don't support the full telnet protocol yet (it's coming)]]
		print [[so you may have trouble using the arrow keys, etc. depending on your system.]]
		print [[]]
		print [[For now we offer a couple of handy shortcuts:]]
		print [[!! - Repeat the last command]]
		print [[!old!new! - repeat the last command, but with 'old' replaced by 'new']]
		print [[]]
		print [[For those well-versed in Prosody's internals, or taking instruction from those who are,]]
		print [[you can prefix a command with > to escape the console sandbox, and access everything in]]
		print [[the running server. Great fun, but be careful not to break anything :)]]
	elseif section == "columns" then
		print [[The columns shown by c2s:show() and s2s:show() can be customizied via the]]
		print [['columns' argument as described here.]]
		print [[]]
		print [[Columns can be specified either as "id jid ipv" or as {"id", "jid", "ipv"}.]]
		print [[Available columns are:]]
		local meta_columns = {
			{ title = "ID"; width = 5 };
			{ title = "Column Title"; width = 12 };
			{ title = "Description"; width = 12 };
		};
		-- auto-adjust widths
		for column, spec in pairs(available_columns) do
			meta_columns[1].width = math.max(meta_columns[1].width or 0, #column);
			meta_columns[2].width = math.max(meta_columns[2].width or 0, #(spec.title or ""));
			meta_columns[3].width = math.max(meta_columns[3].width or 0, #(spec.description or ""));
		end
		local row = format_table(meta_columns, session.width)
		print(row());
		for column, spec in iterators.sorted_pairs(available_columns) do
			print(row({ column, spec.title, spec.description }));
		end
		print [[]]
		print [[Most fields on the internal session structures can also be used as columns]]
		-- Also, you can pass a table column specification directly, with mapper callback and all
	end
end

-- Session environment --
-- Anything in def_env will be accessible within the session as a global variable

--luacheck: ignore 212/self
local serialize_defaults = module:get_option("console_prettyprint_settings",
	{ fatal = false; unquoted = true; maxdepth = 2; table_iterator = "pairs" })

def_env.output = {};
function def_env.output:configure(opts)
	if type(opts) ~= "table" then
		opts = { preset = opts };
	end
	if not opts.fallback then
		-- XXX Error message passed to fallback is lost, does it matter?
		opts.fallback = tostring;
	end
	for k,v in pairs(serialize_defaults) do
		if opts[k] == nil then
			opts[k] = v;
		end
	end
	if opts.table_iterator == "pairs" then
		opts.table_iterator = pairs;
	elseif type(opts.table_iterator) ~= "function" then
		opts.table_iterator = nil; -- rawpairs is the default
	end
	self.session.serialize = serialization.new(opts);
end

def_env.server = {};

function def_env.server:insane_reload()
	prosody.unlock_globals();
	dofile "prosody"
	prosody = _G.prosody;
	return true, "Server reloaded";
end

function def_env.server:version()
	return true, tostring(prosody.version or "unknown");
end

function def_env.server:uptime()
	local t = os.time()-prosody.start_time;
	local seconds = t%60;
	t = (t - seconds)/60;
	local minutes = t%60;
	t = (t - minutes)/60;
	local hours = t%24;
	t = (t - hours)/24;
	local days = t;
	return true, string.format("This server has been running for %d day%s, %d hour%s and %d minute%s (since %s)",
		days, (days ~= 1 and "s") or "", hours, (hours ~= 1 and "s") or "",
		minutes, (minutes ~= 1 and "s") or "", os.date("%c", prosody.start_time));
end

function def_env.server:shutdown(reason, code)
	prosody.shutdown(reason, code);
	return true, "Shutdown initiated";
end

local function human(kb)
	return format_number(kb*1024, "B", "b");
end

function def_env.server:memory()
	if not has_pposix or not pposix.meminfo then
		return true, "Lua is using "..human(collectgarbage("count"));
	end
	local mem, lua_mem = pposix.meminfo(), collectgarbage("count");
	local print = self.session.print;
	print("Process: "..human((mem.allocated+mem.allocated_mmap)/1024));
	print("   Used: "..human(mem.used/1024).." ("..human(lua_mem).." by Lua)");
	print("   Free: "..human(mem.unused/1024).." ("..human(mem.returnable/1024).." returnable)");
	return true, "OK";
end

def_env.module = {};

local function get_hosts_set(hosts)
	if type(hosts) == "table" then
		if hosts[1] then
			return set.new(hosts);
		elseif hosts._items then
			return hosts;
		end
	elseif type(hosts) == "string" then
		return set.new { hosts };
	elseif hosts == nil then
		return set.new(array.collect(keys(prosody.hosts)));
	end
end

-- Hosts with a module or all virtualhosts if no module given
-- matching modules_enabled in the global section
local function get_hosts_with_module(hosts, module)
	local hosts_set = get_hosts_set(hosts)
	/ function (host)
			if module then
				-- Module given, filter in hosts with this module loaded
				if modulemanager.is_loaded(host, module) then
					return host;
				else
					return nil;
				end
			end
			if not hosts then
				-- No hosts given, filter in VirtualHosts
				if prosody.hosts[host].type == "local" then
					return host;
				else
					return nil
				end
			end;
			-- No module given, but hosts are, don't filter at all
			return host;
		end;
	if module and modulemanager.get_module("*", module) then
		hosts_set:add("*");
	end
	return hosts_set;
end

function def_env.module:info(name, hosts)
	if not name then
		return nil, "module name expected";
	end
	local print = self.session.print;
	hosts = get_hosts_with_module(hosts, name);
	if hosts:empty() then
		return false, "mod_" .. name .. " does not appear to be loaded on the specified hosts";
	end

	local function item_name(item) return item.name; end

	local function task_timefmt(t)
		if not t then
			return "no last run time"
		elseif os.difftime(os.time(), t) < 86400 then
			return os.date("last run today at %H:%M", t);
		else
			return os.date("last run %A at %H:%M", t);
		end
	end

	local friendly_descriptions = {
		["adhoc-provider"] = "Ad-hoc commands",
		["auth-provider"] = "Authentication provider",
		["http-provider"] = "HTTP services",
		["net-provider"] = "Network service",
		["storage-provider"] = "Storage driver",
		["measure"] = "Legacy metrics",
		["metric"] = "Metrics",
		["task"] = "Periodic task",
	};
	local item_formatters = {
		["feature"] = tostring,
		["identity"] = function(ident) return ident.type .. "/" .. ident.category; end,
		["adhoc-provider"] = item_name,
		["auth-provider"] = item_name,
		["storage-provider"] = item_name,
		["http-provider"] = function(item, mod) return mod:http_url(item.name, item.default_path); end,
		["net-provider"] = function(item)
			local service_name = item.name;
			local ports_list = {};
			for _, interface, port in portmanager.get_active_services():iter(service_name, nil, nil) do
				table.insert(ports_list, "["..interface.."]:"..port);
			end
			if not ports_list[1] then
				return service_name..": not listening on any ports";
			end
			return service_name..": "..table.concat(ports_list, ", ");
		end,
		["measure"] = function(item) return item.name .. " (" .. suf(item.conf and item.conf.unit, " ") .. item.type .. ")"; end,
		["metric"] = function(item)
			return ("%s (%s%s)%s"):format(item.name, suf(item.mf.unit, " "), item.mf.type_, pre(": ", item.mf.description));
		end,
		["task"] = function (item) return string.format("%s (%s, %s)", item.name or item.id, item.when, task_timefmt(item.last)); end
	};

	for host in hosts do
		local mod = modulemanager.get_module(host, name);
		if mod.module.host == "*" then
			print("in global context");
		else
			print("on " .. tostring(prosody.hosts[mod.module.host]));
		end
		print("  path: " .. (mod.module.path or "n/a"));
		if mod.module.status_message then
			print("  status: [" .. mod.module.status_type .. "] " .. mod.module.status_message);
		end
		if mod.module.items and next(mod.module.items) ~= nil then
			print("  provides:");
			for kind, items in pairs(mod.module.items) do
				local label = friendly_descriptions[kind] or kind:gsub("%-", " "):gsub("^%a", string.upper);
				print(string.format("  - %s (%d item%s)", label, #items, #items > 1 and "s" or ""));
				local formatter = item_formatters[kind];
				if formatter then
					for _, item in ipairs(items) do
						print("    - " .. formatter(item, mod.module));
					end
				end
			end
		end
		if mod.module.dependencies and next(mod.module.dependencies) ~= nil then
			print("  dependencies:");
			for dep in pairs(mod.module.dependencies) do
				-- Dependencies are per module instance, not per host, so dependencies
				-- of/on global modules may list modules not actually loaded on the
				-- current host.
				if modulemanager.is_loaded(host, dep) then
					print("  - mod_" .. dep);
				end
			end
		end
		if mod.module.reverse_dependencies and next(mod.module.reverse_dependencies) ~= nil then
			print("  reverse dependencies:");
			for dep in pairs(mod.module.reverse_dependencies) do
				if modulemanager.is_loaded(host, dep) then
					print("  - mod_" .. dep);
				end
			end
		end
	end
	return true;
end

function def_env.module:load(name, hosts)
	hosts = get_hosts_with_module(hosts);

	-- Load the module for each host
	local ok, err, count, mod = true, nil, 0;
	for host in hosts do
		if (not modulemanager.is_loaded(host, name)) then
			mod, err = modulemanager.load(host, name);
			if not mod then
				ok = false;
				if err == "global-module-already-loaded" then
					if count > 0 then
						ok, err, count = true, nil, 1;
					end
					break;
				end
				self.session.print(err or "Unknown error loading module");
			else
				count = count + 1;
				self.session.print("Loaded for "..mod.module.host);
			end
		end
	end

	return ok, (ok and "Module loaded onto "..count.." host"..(count ~= 1 and "s" or "")) or ("Last error: "..tostring(err));
end

function def_env.module:unload(name, hosts)
	hosts = get_hosts_with_module(hosts, name);

	-- Unload the module for each host
	local ok, err, count = true, nil, 0;
	for host in hosts do
		if modulemanager.is_loaded(host, name) then
			ok, err = modulemanager.unload(host, name);
			if not ok then
				ok = false;
				self.session.print(err or "Unknown error unloading module");
			else
				count = count + 1;
				self.session.print("Unloaded from "..host);
			end
		end
	end
	return ok, (ok and "Module unloaded from "..count.." host"..(count ~= 1 and "s" or "")) or ("Last error: "..tostring(err));
end

local function _sort_hosts(a, b)
	if a == "*" then return true
	elseif b == "*" then return false
	else return a:gsub("[^.]+", string.reverse):reverse() < b:gsub("[^.]+", string.reverse):reverse(); end
end

function def_env.module:reload(name, hosts)
	hosts = array.collect(get_hosts_with_module(hosts, name)):sort(_sort_hosts)

	-- Reload the module for each host
	local ok, err, count = true, nil, 0;
	for _, host in ipairs(hosts) do
		if modulemanager.is_loaded(host, name) then
			ok, err = modulemanager.reload(host, name);
			if not ok then
				ok = false;
				self.session.print(err or "Unknown error reloading module");
			else
				count = count + 1;
				if ok == nil then
					ok = true;
				end
				self.session.print("Reloaded on "..host);
			end
		end
	end
	return ok, (ok and "Module reloaded on "..count.." host"..(count ~= 1 and "s" or "")) or ("Last error: "..tostring(err));
end

function def_env.module:list(hosts)
	hosts = array.collect(set.new({ not hosts and "*" or nil }) + get_hosts_set(hosts)):sort(_sort_hosts);

	local print = self.session.print;
	for _, host in ipairs(hosts) do
		print((host == "*" and "Global" or host)..":");
		local modules = array.collect(keys(modulemanager.get_modules(host) or {})):sort();
		if #modules == 0 then
			if prosody.hosts[host] then
				print("    No modules loaded");
			else
				print("    Host not found");
			end
		else
			for _, name in ipairs(modules) do
				local status, status_text = modulemanager.get_module(host, name).module:get_status();
				local status_summary = "";
				if status == "warn" or status == "error" then
					status_summary = (" (%s: %s)"):format(status, status_text);
				end
				print(("    %s%s"):format(name, status_summary));
			end
		end
	end
end

def_env.config = {};
function def_env.config:load(filename, format)
	local config_load = require "prosody.core.configmanager".load;
	local ok, err = config_load(filename, format);
	if not ok then
		return false, err or "Unknown error loading config";
	end
	return true, "Config loaded";
end

function def_env.config:get(host, key)
	if key == nil then
		host, key = "*", host;
	end
	local config_get = require "prosody.core.configmanager".get
	return true, serialize_config(config_get(host, key));
end

function def_env.config:reload()
	local ok, err = prosody.reload_config();
	return ok, (ok and "Config reloaded (you may need to reload modules to take effect)") or tostring(err);
end

def_env.c2s = {};

local function get_jid(session)
	if session.username then
		return session.full_jid or jid_join(session.username, session.host, session.resource);
	end

	local conn = session.conn;
	local ip = session.ip or "?";
	local clientport = conn and conn:clientport() or "?";
	local serverip = conn and conn.server and conn:server():ip() or "?";
	local serverport = conn and conn:serverport() or "?"
	return jid_join("["..ip.."]:"..clientport, session.host or "["..serverip.."]:"..serverport);
end

local function get_c2s()
	local c2s = array.collect(values(prosody.full_sessions));
	c2s:append(array.collect(values(module:shared"/*/c2s/sessions")));
	c2s:append(array.collect(values(module:shared"/*/bosh/sessions")));
	c2s:unique();
	return c2s;
end

local function _sort_by_jid(a, b)
	if a.host == b.host then
		if a.username == b.username then return (a.resource or "") > (b.resource or ""); end
		return (a.username or "") > (b.username or "");
	end
	return _sort_hosts(a.host or "", b.host or "");
end

local function show_c2s(callback)
	get_c2s():sort(_sort_by_jid):map(function (session)
		callback(get_jid(session), session)
	end);
end

function def_env.c2s:count()
	local c2s = get_c2s();
	return true, "Total: "..  #c2s .." clients";
end

local function get_s2s_hosts(session) --> local,remote
	if session.direction == "outgoing" then
		return session.host or session.from_host, session.to_host;
	elseif session.direction == "incoming" then
		return session.host or session.to_host, session.from_host;
	end
end

available_columns = {
	jid = {
		title = "JID";
		description = "Full JID of user session";
		width = "3p";
		key = "full_jid";
		mapper = function(full_jid, session) return full_jid or get_jid(session) end;
	};
	host = {
		title = "Host";
		description = "Local hostname";
		key = "host";
		width = "1p";
		mapper = function(host, session)
			return host or get_s2s_hosts(session) or "?";
		end;
	};
	remote = {
		title = "Remote";
		description = "Remote hostname";
		width = "1p";
		mapper = function(_, session)
			return select(2, get_s2s_hosts(session));
		end;
	};
	port = {
		title = "Port";
		description = "Server port used";
		width = #string.format("%d", 0xffff); -- max 16 bit unsigned integer
		align = "right";
		key = "conn";
		mapper = function(conn)
			if conn then
				return conn:serverport();
			end
		end;
	};
	dir = {
		title = "Dir";
		description = "Direction of server-to-server connection";
		width = #"<->";
		key = "direction";
		mapper = function(dir, session)
			if session.incoming and session.outgoing then return "<->"; end
			if dir == "outgoing" then return "-->"; end
			if dir == "incoming" then return "<--"; end
		end;
	};
	id = {
		title = "Session ID";
		description = "Internal session ID used in logging";
		-- Depends on log16(?) of pointers which may vary over runtime, so + some margin
		width = math.max(#"c2s", #"s2sin", #"s2sout") + #(tostring({}):match("%x+$")) + 2;
		key = "id";
	};
	type = {
		title = "Type";
		description = "Session type";
		width = math.max(#"c2s_unauthed", #"s2sout_unauthed");
		key = "type";
	};
	method = {
		title = "Method";
		description = "Connection method";
		width = math.max(#"BOSH", #"WebSocket", #"TCP");
		mapper = function(_, session)
			if session.bosh_version then
				return "BOSH";
			elseif session.websocket_request then
				return "WebSocket";
			else
				return "TCP";
			end
		end;
	};
	ipv = {
		title = "IPv";
		description = "Internet Protocol version (4 or 6)";
		width = #"IPvX";
		key = "ip";
		mapper = function(ip) if ip then return ip:find(":") and "IPv6" or "IPv4"; end end;
	};
	ip = {
		title = "IP address";
		description = "IP address the session connected from";
		width = #"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff";
		key = "ip";
	};
	status = {
		title = "Status";
		description = "Presence status";
		width = math.max(#"online", #"chat");
		key = "presence";
		mapper = function(p)
			if not p then return ""; end
			return p:get_child_text("show") or "online";
		end;
	};
	secure = {
		title = "Security";
		description = "TLS version or security status";
		key = "conn";
		width = math.max(#"secure", "TLSvX.Y");
		mapper = function(conn, session)
			if not session.secure then return "insecure"; end
			if not conn or not conn:ssl() then return "secure" end
			local tls_info = conn.ssl_info and conn:ssl_info();
			return tls_info and tls_info.protocol or "secure";
		end;
	};
	encryption = {
		title = "Encryption";
		description = "Encryption algorithm used (TLS cipher suite)";
		-- openssl ciphers 'ALL:COMPLEMENTOFALL' | tr : \\n | awk 'BEGIN {n=1} length() > n {n=length()} END {print(n)}'
		width = #"ECDHE-ECDSA-CHACHA20-POLY1305";
		key = "conn";
		mapper = function(conn)
			local info = conn and conn.ssl_info and conn:ssl_info();
			if info then return info.cipher end
		end;
	};
	cert = {
		title = "Certificate";
		description = "Validation status of certificate";
		key = "cert_identity_status";
		width = math.max(#"Expired", #"Self-signed", #"Untrusted", #"Mismatched", #"Unknown");
		mapper = function(cert_status, session)
			if cert_status then return capitalize(cert_status); end
			if session.cert_chain_status == "Invalid" then
				local cert_errors = set.new(session.cert_chain_errors[1]);
				if cert_errors:contains("certificate has expired") then
					return "Expired";
				elseif cert_errors:contains("self signed certificate") then
					return "Self-signed";
				end
				return "Untrusted";
			elseif session.cert_identity_status == "invalid" then
				return "Mismatched";
			end
			return "Unknown";
		end;
	};
	sni = {
		title = "SNI";
		description = "Hostname requested in TLS";
		width = "1p"; -- same as host, remote etc
		mapper = function(_, session)
			if not session.conn then return end
			local sock = session.conn:socket();
			return sock and sock.getsniname and sock:getsniname() or "";
		end;
	};
	alpn = {
		title = "ALPN";
		description = "Protocol requested in TLS";
		width = math.max(#"http/1.1", #"xmpp-client", #"xmpp-server");
		mapper = function(_, session)
			if not session.conn then return end
			local sock = session.conn:socket();
			return sock and sock.getalpn and sock:getalpn() or "";
		end;
	};
	smacks = {
		title = "SM";
		description = "Stream Management (XEP-0198) status";
		key = "smacks";
		-- FIXME shorter synonym for hibernating
		width = math.max(#"yes", #"no", #"hibernating");
		mapper = function(smacks_xmlns, session)
			if not smacks_xmlns then return "no"; end
			if session.hibernating then return "hibernating"; end
			return "yes";
		end;
	};
	smacks_queue = {
		title = "SM Queue";
		description = "Length of Stream Management stanza queue";
		key = "outgoing_stanza_queue";
		width = 8;
		align = "right";
		mapper = function (queue)
			return queue and tostring(queue:count_unacked());
		end
	};
	csi = {
		title = "CSI State";
		description = "Client State Indication (XEP-0352)";
		key = "state";
		-- TODO include counter
	};
	s2s_sasl = {
		title = "SASL";
		description = "Server authentication status";
		key = "external_auth";
		width = 10;
		mapper = capitalize
	};
	dialback = {
		title = "Dialback";
		description = "Legacy server verification";
		key = "dialback_key";
		width = math.max(#"Not used", #"Not initiated", #"Initiated", #"Completed");
		mapper = function (dialback_key, session)
			if not dialback_key then
				if session.type == "s2sin" or session.type == "s2sout" then
					return "Not used";
				end
				return "Not initiated";
			elseif session.type == "s2sin_unauthed" or session.type == "s2sout_unauthed" then
				return "Initiated";
			else
				return "Completed";
			end
		end
	};
	role = {
		title = "Role";
		description = "Session role with 'prosody:' prefix removed";
		width = #"admin";
		key = "role";
		mapper = function(role)
			local name = role and role.name;
			return name and name:match"^prosody:(%w+)" or name;
		end;
	}
};

local function get_colspec(colspec, default)
	if type(colspec) == "string" then colspec = array(colspec:gmatch("%S+")); end
	local columns = {};
	for i, col in pairs(colspec or default) do
		if type(col) == "string" then
			columns[i] = available_columns[col] or { title = capitalize(col); width = 20; key = col };
		elseif type(col) ~= "table" then
			return false, ("argument %d: expected string|table but got %s"):format(i, type(col));
		else
			columns[i] = col;
		end
	end

	return columns;
end

function def_env.c2s:show(match_jid, colspec)
	local print = self.session.print;
	local columns = get_colspec(colspec, { "id"; "jid"; "role"; "ipv"; "status"; "secure"; "smacks"; "csi" });
	local row = format_table(columns, self.session.width);

	local function match(session)
		local jid = get_jid(session)
		return (not match_jid) or jid_compare(jid, match_jid);
	end

	local group_by_host = true;
	for _, col in ipairs(columns) do
		if col.key == "full_jid" or col.key == "host" then
			group_by_host = false;
			break
		end
	end

	if not group_by_host then print(row()); end
	local currenthost = nil;

	local c2s_sessions = get_c2s();
	local total_count = #c2s_sessions;
	c2s_sessions:filter(match):sort(_sort_by_jid);
	local shown_count = #c2s_sessions;
	for _, session in ipairs(c2s_sessions) do
		if group_by_host and session.host ~= currenthost then
			currenthost = session.host;
			print("#",prosody.hosts[currenthost] or "Unknown host");
			print(row());
		end

		print(row(session));
	end
	if total_count ~= shown_count then
		return true, ("%d out of %d c2s sessions shown"):format(shown_count, total_count);
	end
	return true, ("%d c2s sessions shown"):format(total_count);
end

function def_env.c2s:show_tls(match_jid)
	return self:show(match_jid, { "jid"; "id"; "secure"; "encryption" });
end

local function build_reason(text, condition)
	if text or condition then
		return {
			text = text,
			condition = condition or "undefined-condition",
		};
	end
end

function def_env.c2s:close(match_jid, text, condition)
	local count = 0;
	show_c2s(function (jid, session)
		if jid == match_jid or jid_bare(jid) == match_jid then
			count = count + 1;
			session:close(build_reason(text, condition));
		end
	end);
	return true, "Total: "..count.." sessions closed";
end

function def_env.c2s:closeall(text, condition)
	local count = 0;
	--luacheck: ignore 212/jid
	show_c2s(function (jid, session)
		count = count + 1;
		session:close(build_reason(text, condition));
	end);
	return true, "Total: "..count.." sessions closed";
end


def_env.s2s = {};
local function _sort_s2s(a, b)
	local a_local, a_remote = get_s2s_hosts(a);
	local b_local, b_remote = get_s2s_hosts(b);
	if (a_local or "") == (b_local or "") then return _sort_hosts(a_remote or "", b_remote or ""); end
	return _sort_hosts(a_local or "", b_local or "");
end

function def_env.s2s:show(match_jid, colspec)
	local print = self.session.print;
	local columns = get_colspec(colspec, { "id"; "host"; "dir"; "remote"; "ipv"; "secure"; "s2s_sasl"; "dialback" });
	local row = format_table(columns, self.session.width);

	local function match(session)
		local host, remote = get_s2s_hosts(session);
		return not match_jid or host == match_jid or remote == match_jid;
	end

	local group_by_host = true;
	local currenthost = nil;
	for _, col in ipairs(columns) do
		if col.key == "host" then
			group_by_host = false;
			break
		end
	end

	if not group_by_host then print(row()); end

	local s2s_sessions = array(iterators.values(module:shared"/*/s2s/sessions"));
	local total_count = #s2s_sessions;
	s2s_sessions:filter(match):sort(_sort_s2s);
	local shown_count = #s2s_sessions;

	for _, session in ipairs(s2s_sessions) do
		if group_by_host and currenthost ~= get_s2s_hosts(session) then
			currenthost = get_s2s_hosts(session);
			print("#",prosody.hosts[currenthost] or "Unknown host");
			print(row());
		end

		print(row(session));
	end
	if total_count ~= shown_count then
		return true, ("%d out of %d s2s connections shown"):format(shown_count, total_count);
	end
	return true, ("%d s2s connections shown"):format(total_count);
end

function def_env.s2s:show_tls(match_jid)
	return self:show(match_jid, { "id"; "host"; "dir"; "remote"; "secure"; "encryption"; "cert" });
end

local function print_subject(print, subject)
	for _, entry in ipairs(subject) do
		print(
			("    %s: %q"):format(
				entry.name or entry.oid,
				entry.value:gsub("[\r\n%z%c]", " ")
			)
		);
	end
end

-- As much as it pains me to use the 0-based depths that OpenSSL does,
-- I think there's going to be more confusion among operators if we
-- break from that.
local function print_errors(print, errors)
	for depth, t in pairs(errors) do
		print(
			("    %d: %s"):format(
				depth-1,
				table.concat(t, "\n|        ")
			)
		);
	end
end

function def_env.s2s:showcert(domain)
	local print = self.session.print;
	local s2s_sessions = module:shared"/*/s2s/sessions";
	local domain_sessions = set.new(array.collect(values(s2s_sessions)))
		/function(session) return (session.to_host == domain or session.from_host == domain) and session or nil; end;
	local cert_set = {};
	for session in domain_sessions do
		local conn = session.conn;
		conn = conn and conn:socket();
		if not conn.getpeerchain then
			if conn.dohandshake then
				error("This version of LuaSec does not support certificate viewing");
			end
		else
			local cert = conn:getpeercertificate();
			if cert then
				local certs = conn:getpeerchain();
				local digest = cert:digest("sha1");
				if not cert_set[digest] then
					local chain_valid, chain_errors = conn:getpeerverification();
					cert_set[digest] = {
						{
						  from = session.from_host,
						  to = session.to_host,
						  direction = session.direction
						};
						chain_valid = chain_valid;
						chain_errors = chain_errors;
						certs = certs;
					};
				else
					table.insert(cert_set[digest], {
						from = session.from_host,
						to = session.to_host,
						direction = session.direction
					});
				end
			end
		end
	end
	local domain_certs = array.collect(values(cert_set));
	-- Phew. We now have a array of unique certificates presented by domain.
	local n_certs = #domain_certs;

	if n_certs == 0 then
		return "No certificates found for "..domain;
	end

	local function _capitalize_and_colon(byte)
		return string.upper(byte)..":";
	end
	local function pretty_fingerprint(hash)
		return hash:gsub("..", _capitalize_and_colon):sub(1, -2);
	end

	for cert_info in values(domain_certs) do
		local certs = cert_info.certs;
		local cert = certs[1];
		print("---")
		print("Fingerprint (SHA1): "..pretty_fingerprint(cert:digest("sha1")));
		print("");
		local n_streams = #cert_info;
		print("Currently used on "..n_streams.." stream"..(n_streams==1 and "" or "s")..":");
		for _, stream in ipairs(cert_info) do
			if stream.direction == "incoming" then
				print("    "..stream.to.." <- "..stream.from);
			else
				print("    "..stream.from.." -> "..stream.to);
			end
		end
		print("");
		local chain_valid, errors = cert_info.chain_valid, cert_info.chain_errors;
		local valid_identity = cert_verify_identity(domain, "xmpp-server", cert);
		if chain_valid then
			print("Trusted certificate: Yes");
		else
			print("Trusted certificate: No");
			print_errors(print, errors);
		end
		print("");
		print("Issuer: ");
		print_subject(print, cert:issuer());
		print("");
		print("Valid for "..domain..": "..(valid_identity and "Yes" or "No"));
		print("Subject:");
		print_subject(print, cert:subject());
	end
	print("---");
	return ("Showing "..n_certs.." certificate"
		..(n_certs==1 and "" or "s")
		.." presented by "..domain..".");
end

function def_env.s2s:close(from, to, text, condition)
	local print, count = self.session.print, 0;
	local s2s_sessions = module:shared"/*/s2s/sessions";

	local match_id;
	if from and not to then
		match_id, from = from, nil;
	elseif not to then
		return false, "Syntax: s2s:close('from', 'to') - Closes all s2s sessions from 'from' to 'to'";
	elseif from == to then
		return false, "Both from and to are the same... you can't do that :)";
	end

	for _, session in pairs(s2s_sessions) do
		local id = session.id or (session.type..tostring(session):match("[a-f0-9]+$"));
		if (match_id and match_id == id)
		or (session.from_host == from and session.to_host == to) then
			print(("Closing connection from %s to %s [%s]"):format(session.from_host, session.to_host, id));
			(session.close or s2smanager.destroy_session)(session, build_reason(text, condition));
			count = count + 1 ;
		end
	end
	return true, "Closed "..count.." s2s session"..((count == 1 and "") or "s");
end

function def_env.s2s:closeall(host, text, condition)
	local count = 0;
	local s2s_sessions = module:shared"/*/s2s/sessions";
	for _,session in pairs(s2s_sessions) do
		if not host or session.from_host == host or session.to_host == host then
			session:close(build_reason(text, condition));
			count = count + 1;
		end
	end
	if count == 0 then return false, "No sessions to close.";
	else return true, "Closed "..count.." s2s session"..((count == 1 and "") or "s"); end
end

def_env.host = {}; def_env.hosts = def_env.host;

function def_env.host:activate(hostname, config)
	return hostmanager.activate(hostname, config);
end
function def_env.host:deactivate(hostname, reason)
	return hostmanager.deactivate(hostname, reason);
end

function def_env.host:list()
	local print = self.session.print;
	local i = 0;
	local host_type;
	for host, host_session in iterators.sorted_pairs(prosody.hosts, _sort_hosts) do
		i = i + 1;
		host_type = host_session.type;
		if host_type == "local" then
			print(host);
		else
			host_type = module:context(host):get_option_string("component_module", host_type);
			if host_type ~= "component" then
				host_type = host_type .. " component";
			end
			print(("%s (%s)"):format(host, host_type));
		end
	end
	return true, i.." hosts";
end

def_env.port = {};

function def_env.port:list()
	local print = self.session.print;
	local services = portmanager.get_active_services().data;
	local n_services, n_ports = 0, 0;
	for service, interfaces in iterators.sorted_pairs(services) do
		n_services = n_services + 1;
		local ports_list = {};
		for interface, ports in pairs(interfaces) do
			for port in pairs(ports) do
				table.insert(ports_list, "["..interface.."]:"..port);
			end
		end
		n_ports = n_ports + #ports_list;
		print(service..": "..table.concat(ports_list, ", "));
	end
	return true, n_services.." services listening on "..n_ports.." ports";
end

function def_env.port:close(close_port, close_interface)
	close_port = assert(tonumber(close_port), "Invalid port number");
	local n_closed = 0;
	local services = portmanager.get_active_services().data;
	for service, interfaces in pairs(services) do -- luacheck: ignore 213
		for interface, ports in pairs(interfaces) do
			if not close_interface or close_interface == interface then
				if ports[close_port] then
					self.session.print("Closing ["..interface.."]:"..close_port.."...");
					local ok, err = portmanager.close(interface, close_port)
					if not ok then
						self.session.print("Failed to close "..interface.." "..close_port..": "..err);
					else
						n_closed = n_closed + 1;
					end
				end
			end
		end
	end
	return true, "Closed "..n_closed.." ports";
end

def_env.muc = {};

local console_room_mt = {
	__index = function (self, k) return self.room[k]; end;
	__tostring = function (self)
		return "MUC room <"..self.room.jid..">";
	end;
};

local function check_muc(jid)
	local room_name, host = jid_split(jid);
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif not prosody.hosts[host].modules.muc then
		return nil, "Host '"..host.."' is not a MUC service";
	end
	return room_name, host;
end

local function get_muc(room_jid)
	local room_name, host = check_muc(room_jid);
	if not room_name then
		return room_name, host;
	end
	local room_obj = prosody.hosts[host].modules.muc.get_room_from_jid(room_jid);
	if not room_obj then
		return nil, "No such room: "..room_jid;
	end
	return room_obj;
end

local muc_util = module:require"muc/util";

function def_env.muc:create(room_jid, config)
	local room_name, host = check_muc(room_jid);
	if not room_name then
		return room_name, host;
	end
	if not room_name then return nil, host end
	if config ~= nil and type(config) ~= "table" then return nil, "Config must be a table"; end
	if prosody.hosts[host].modules.muc.get_room_from_jid(room_jid) then return nil, "Room exists already" end
	return prosody.hosts[host].modules.muc.create_room(room_jid, config);
end

function def_env.muc:room(room_jid)
	local room_obj, err = get_muc(room_jid);
	if not room_obj then
		return room_obj, err;
	end
	return setmetatable({ room = room_obj }, console_room_mt);
end

function def_env.muc:list(host)
	local host_session = prosody.hosts[host];
	if not host_session or not host_session.modules.muc then
		return nil, "Please supply the address of a local MUC component";
	end
	local print = self.session.print;
	local c = 0;
	for room in host_session.modules.muc.each_room() do
		print(room.jid);
		c = c + 1;
	end
	return true, c.." rooms";
end

function def_env.muc:occupants(room_jid, filter)
	local room_obj, err = get_muc(room_jid);
	if not room_obj then
		return room_obj, err;
	end

	local print = self.session.print;
	local row = format_table({
		{ title = "Role"; width = 12; key = "role" }; -- longest role name
		{ title = "JID"; width = "75%"; key = "bare_jid" };
		{ title = "Nickname"; width = "25%"; key = "nick"; mapper = jid_resource };
	}, self.session.width);
	local occupants = array.collect(iterators.select(2, room_obj:each_occupant()));
	local total = #occupants;
	if filter then
		occupants:filter(function(occupant)
			return occupant.role == filter or jid_resource(occupant.nick):find(filter, 1, true);
		end);
	end
	local displayed = #occupants;
	occupants:sort(function(a, b)
		if a.role ~= b.role then
			return muc_util.valid_roles[a.role] > muc_util.valid_roles[b.role];
		else
			return a.bare_jid < b.bare_jid;
		end
	end);

	if displayed == 0 then
		return true, ("%d out of %d occupant%s listed"):format(displayed, total, total ~= 1 and "s" or "")
	end

	print(row());
	for _, occupant in ipairs(occupants) do
		print(row(occupant));
	end

	if total == displayed then
		return true, ("%d occupant%s listed"):format(total, total ~= 1 and "s" or "")
	else
		return true, ("%d out of %d occupant%s listed"):format(displayed, total, total ~= 1 and "s" or "")
	end
end

function def_env.muc:affiliations(room_jid, filter)
	local room_obj, err = get_muc(room_jid);
	if not room_obj then
		return room_obj, err;
	end

	local print = self.session.print;
	local row = format_table({
		{ title = "Affiliation"; width = 12 }; -- longest affiliation name
		{ title = "JID"; width = "75%" };
		{ title = "Nickname"; width = "25%"; key = "reserved_nickname" };
	}, self.session.width);
	local affiliated = array();
	for affiliated_jid, affiliation, affiliation_data in room_obj:each_affiliation() do
		affiliated:push(setmetatable({ affiliation; affiliated_jid }, { __index = affiliation_data }));
	end

	local total = #affiliated;
	if filter then
		affiliated:filter(function(affiliation)
			return filter == affiliation[1] or affiliation[2]:find(filter, 1, true);
		end);
	end
	local displayed = #affiliated;
	local aff_ranking = muc_util.valid_affiliations;
	affiliated:sort(function(a, b)
		if a[1] ~= b[1] then
			return aff_ranking[a[1]] > aff_ranking[b[1]];
		else
			return a[2] < b[2];
		end
	end);

	if displayed == 0 then
		return true, ("%d out of %d affiliations%s listed"):format(displayed, total, total ~= 1 and "s" or "")
	end

	print(row());
	for _, affiliation in ipairs(affiliated) do
		print(row(affiliation));
	end


	if total == displayed then
		return true, ("%d affiliation%s listed"):format(total, total ~= 1 and "s" or "")
	else
		return true, ("%d out of %d affiliation%s listed"):format(displayed, total, total ~= 1 and "s" or "")
	end
end

local um = require"prosody.core.usermanager";

def_env.user = {};
function def_env.user:create(jid, password, role)
	local username, host = jid_split(jid);
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif um.user_exists(username, host) then
		return nil, "User exists";
	end

	if role then
		local ok, err = um.create_user(username, nil, host);
		if not ok then
			return nil, "Could not create user: "..err;
		end

		local role_ok, rerr = um.set_user_role(jid, host, role);
		if not role_ok then
			return nil, "Could not set role: " .. tostring(rerr);
		end

		if password then
			local ok, err = um.set_password(username, password, host, nil);
			if not ok then
				return nil, "Could not set password for user: "..err;
			end

			local ok, err = um.enable_user(username, host);
			if not ok and err ~= "method not implemented" then
				return nil, "Could not enable user: "..err;
			end
		end
	else
		local ok, err = um.create_user(username, password, host);
		if not ok then
			return nil, "Could not create user: "..err;
		end
	end

	return true, "User created";
end

function def_env.user:disable(jid)
	local username, host = jid_split(jid);
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif not um.user_exists(username, host) then
		return nil, "No such user";
	end
	local ok, err = um.disable_user(username, host);
	if ok then
		return true, "User disabled";
	else
		return nil, "Could not disable user: "..err;
	end
end

function def_env.user:enable(jid)
	local username, host = jid_split(jid);
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif not um.user_exists(username, host) then
		return nil, "No such user";
	end
	local ok, err = um.enable_user(username, host);
	if ok then
		return true, "User enabled";
	else
		return nil, "Could not enable user: "..err;
	end
end

function def_env.user:delete(jid)
	local username, host = jid_split(jid);
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif not um.user_exists(username, host) then
		return nil, "No such user";
	end
	local ok, err = um.delete_user(username, host);
	if ok then
		return true, "User deleted";
	else
		return nil, "Could not delete user: "..err;
	end
end

function def_env.user:password(jid, password)
	local username, host = jid_split(jid);
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif not um.user_exists(username, host) then
		return nil, "No such user";
	end
	local ok, err = um.set_password(username, password, host, nil);
	if ok then
		return true, "User password changed";
	else
		return nil, "Could not change password for user: "..err;
	end
end

function def_env.user:role(jid, host)
	local print = self.session.print;
	local username, userhost = jid_split(jid);
	if host == nil then host = userhost; end
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif prosody.hosts[userhost] and not um.user_exists(username, userhost) then
		return nil, "No such user";
	end

	local primary_role = um.get_user_role(username, host);
	local secondary_roles = um.get_user_secondary_roles(username, host);

	print(primary_role and primary_role.name or "<none>");

	local count = primary_role and 1 or 0;
	for role_name in pairs(secondary_roles or {}) do
		count = count + 1;
		print(role_name.." (secondary)");
	end

	return true, count == 1 and "1 role" or count.." roles";
end
def_env.user.roles = def_env.user.role;

-- user:setrole("someone@example.com", "example.com", "prosody:admin")
-- user:setrole("someone@example.com", "prosody:admin")
function def_env.user:setrole(jid, host, new_role)
	local username, userhost = jid_split(jid);
	if new_role == nil then host, new_role = userhost, host; end
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif prosody.hosts[userhost] and not um.user_exists(username, userhost) then
		return nil, "No such user";
	end
	return um.set_user_role(username, host, new_role);
end

function def_env.user:addrole(jid, host, new_role)
	local username, userhost = jid_split(jid);
	if new_role == nil then host, new_role = userhost, host; end
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif prosody.hosts[userhost] and not um.user_exists(username, userhost) then
		return nil, "No such user";
	end
	return um.add_user_secondary_role(username, host, new_role);
end

function def_env.user:delrole(jid, host, role_name)
	local username, userhost = jid_split(jid);
	if role_name == nil then host, role_name = userhost, host; end
	if not prosody.hosts[host] then
		return nil, "No such host: "..host;
	elseif prosody.hosts[userhost] and not um.user_exists(username, userhost) then
		return nil, "No such user";
	end
	return um.remove_user_secondary_role(username, host, role_name);
end

-- TODO switch to table view, include roles
function def_env.user:list(host, pat)
	if not host then
		return nil, "No host given";
	elseif not prosody.hosts[host] then
		return nil, "No such host";
	end
	local print = self.session.print;
	local total, matches = 0, 0;
	for user in um.users(host) do
		if not pat or user:match(pat) then
			print(user.."@"..host);
			matches = matches + 1;
		end
		total = total + 1;
	end
	return true, "Showing "..(pat and (matches.." of ") or "all " )..total.." users";
end

def_env.xmpp = {};

local new_id = require "prosody.util.id".medium;
function def_env.xmpp:ping(localhost, remotehost, timeout)
	localhost = select(2, jid_split(localhost));
	remotehost = select(2, jid_split(remotehost));
	if not localhost then
		return nil, "Invalid sender hostname";
	elseif not prosody.hosts[localhost] then
		return nil, "No such local host";
	end
	if not remotehost then
		return nil, "Invalid destination hostname";
	elseif prosody.hosts[remotehost] then
		return nil, "Both hosts are local";
	end
	local iq = st.iq{ from=localhost, to=remotehost, type="get", id=new_id()}
			:tag("ping", {xmlns="urn:xmpp:ping"});
	local time_start = time.now();
	local print = self.session.print;
	local function onchange(what)
		return function(event)
			local s2s_session = event.session;
			if (s2s_session.from_host == localhost and s2s_session.to_host == remotehost)
				or (s2s_session.to_host == localhost and s2s_session.from_host == remotehost) then
				local dir = available_columns.dir.mapper(s2s_session.direction, s2s_session);
				print(("Session %s (%s%s%s) %s (%gs)"):format(s2s_session.id, localhost, dir, remotehost, what,
					time.now() - time_start));
			elseif s2s_session.type == "s2sin_unauthed" and s2s_session.to_host == nil and s2s_session.from_host == nil then
				print(("Session %s %s (%gs)"):format(s2s_session.id, what, time.now() - time_start));
			end
		end
	end
	local onconnected = onchange("connected");
	local onauthenticated = onchange("authenticated");
	local onestablished = onchange("established");
	local ondestroyed = onchange("destroyed");
	module:hook("s2s-connected", onconnected, 1);
	module:context(localhost):hook("s2s-authenticated", onauthenticated, 1);
	module:hook("s2sout-established", onestablished, 1);
	module:hook("s2sin-established", onestablished, 1);
	module:hook("s2s-destroyed", ondestroyed, 1);
	return module:context(localhost):send_iq(iq, nil, timeout):finally(function()
		module:unhook("s2s-connected", onconnected, 1);
		module:context(localhost):unhook("s2s-authenticated", onauthenticated);
		module:unhook("s2sout-established", onestablished);
		module:unhook("s2sin-established", onestablished);
		module:unhook("s2s-destroyed", ondestroyed);
	end):next(function(pong)
		return ("pong from %s on %s in %gs"):format(pong.stanza.attr.from, pong.origin.id, time.now() - time_start);
	end);
end

def_env.dns = {};
local adns = require"prosody.net.adns";

local function get_resolver(session)
	local resolver = session.dns_resolver;
	if not resolver then
		resolver = adns.resolver();
		session.dns_resolver = resolver;
	end
	return resolver;
end

function def_env.dns:lookup(name, typ, class)
	local resolver = get_resolver(self.session);
	return resolver:lookup_promise(name, typ, class)
end

function def_env.dns:addnameserver(...)
	local resolver = get_resolver(self.session);
	resolver._resolver:addnameserver(...)
	return true
end

function def_env.dns:setnameserver(...)
	local resolver = get_resolver(self.session);
	resolver._resolver:setnameserver(...)
	return true
end

function def_env.dns:purge()
	local resolver = get_resolver(self.session);
	resolver._resolver:purge()
	return true
end

function def_env.dns:cache()
	local resolver = get_resolver(self.session);
	return true, "Cache:\n"..tostring(resolver._resolver.cache)
end

def_env.http = {};

function def_env.http:list(hosts)
	local print = self.session.print;
	hosts = array.collect(set.new({ not hosts and "*" or nil }) + get_hosts_set(hosts)):sort(_sort_hosts);
	local output = format_table({
			{ title = "Module", width = "20%" },
			{ title = "URL", width = "80%" },
		}, self.session.width);

	for _, host in ipairs(hosts) do
		local http_apps = modulemanager.get_items("http-provider", host);
		if #http_apps > 0 then
			local http_host = module:context(host):get_option_string("http_host");
			if host == "*" then
				print("Global HTTP endpoints available on all hosts:");
			else
				print("HTTP endpoints on "..host..(http_host and (" (using "..http_host.."):") or ":"));
			end
			print(output());
			for _, provider in ipairs(http_apps) do
				local mod = provider._provided_by;
				local url = module:context(host):http_url(provider.name, provider.default_path);
				mod = mod and "mod_"..mod or ""
				print(output{mod, url});
			end
			print("");
		end
	end

	local default_host = module:get_option_string("http_default_host");
	if not default_host then
		print("HTTP requests to unknown hosts will return 404 Not Found");
	else
		print("HTTP requests to unknown hosts will be handled by "..default_host);
	end
	return true;
end

def_env.watch = {};

function def_env.watch:log()
	local writing = false;
	local sink = logger.add_simple_sink(function (source, level, message)
		if writing then return; end
		writing = true;
		self.session.print(source, level, message);
		writing = false;
	end);

	while self.session.is_connected() do
		async.sleep(3);
	end
	if not logger.remove_sink(sink) then
		module:log("warn", "Unable to remove watch:log() sink");
	end
end

local stanza_watchers = module:require("mod_debug_stanzas/watcher");
function def_env.watch:stanzas(target_spec, filter_spec)
	local function handler(event_type, stanza, session)
		if stanza then
			if event_type == "sent" then
				self.session.print(("\n<!-- sent to %s -->"):format(session.id));
			elseif event_type == "received" then
				self.session.print(("\n<!-- received from %s -->"):format(session.id));
			else
				self.session.print(("\n<!-- %s (%s) -->"):format(event_type, session.id));
			end
			self.session.print(stanza);
		elseif session then
			self.session.print("\n<!-- session "..session.id.." "..event_type.." -->");
		elseif event_type then
			self.session.print("\n<!-- "..event_type.." -->");
		end
	end

	stanza_watchers.add({
		target_spec = {
			jid = target_spec;
		};
		filter_spec = filter_spec and {
			with_jid = filter_spec;
		};
	}, handler);

	while self.session.is_connected() do
		async.sleep(3);
	end

	stanza_watchers.remove(handler);
end

def_env.debug = {};

function def_env.debug:logevents(host)
	helpers.log_host_events(host);
	return true;
end

function def_env.debug:events(host, event)
	local events_obj;
	if host and host ~= "*" then
		if host == "http" then
			events_obj = require "prosody.net.http.server"._events;
		elseif not prosody.hosts[host] then
			return false, "Unknown host: "..host;
		else
			events_obj = prosody.hosts[host].events;
		end
	else
		events_obj = prosody.events;
	end
	return true, helpers.show_events(events_obj, event);
end

function def_env.debug:timers()
	local print = self.session.print;
	local add_task = require"prosody.util.timer".add_task;
	local h, params = add_task.h, add_task.params;
	local function normalize_time(t)
		return t;
	end
	local function format_time(t)
		return os.date("%F %T", math.floor(normalize_time(t)));
	end
	if h then
		print("-- util.timer");
	elseif server.timer then
		print("-- net.server.timer");
		h = server.timer.add_task.timers;
		normalize_time = server.timer.to_absolute_time or normalize_time;
	end
	if h then
		local timers = {};
		for i, id in ipairs(h.ids) do
			local t, cb = h.priorities[i], h.items[id];
			if not params then
				local param = cb.param;
				if param then
					cb = param.callback;
				else
					cb = cb.timer_callback or cb;
				end
			elseif params[id] then
				cb = params[id].callback or cb;
			end
			table.insert(timers, { format_time(t), cb });
		end
		table.sort(timers, function (a, b) return a[1] < b[1] end);
		for _, t in ipairs(timers) do
			print(t[1], t[2])
		end
	end
	if server.event_base then
		local count = 0;
		for _, v in pairs(debug.getregistry()) do
			if type(v) == "function" and v.callback and v.callback == add_task._on_timer then
				count = count + 1;
			end
		end
		print(count .. " libevent callbacks");
	end
	if h then
		local next_time = h:peek();
		if next_time then
			return true, ("Next event at %s (in %.6fs)"):format(format_time(next_time), normalize_time(next_time) - time.now());
		end
	end
	return true;
end

-- COMPAT: debug:timers() was timer:info() for some time in trunk
def_env.timer = { info = def_env.debug.timers };

def_env.stats = {};

local short_units = {
	seconds = "s",
	bytes = "B",
};

local stats_methods = {};

function stats_methods:render_single_fancy_histogram_ex(print, prefix, metric_family, metric, cumulative)
	local creation_timestamp, sum, count
	local buckets = {}
	local prev_bucket_count = 0
	for suffix, extra_labels, value in metric:iter_samples() do
		if suffix == "_created" then
			creation_timestamp = value
		elseif suffix == "_sum" then
			sum = value
		elseif suffix == "_count" then
			count = value
		elseif extra_labels then
			local bucket_threshold = extra_labels["le"]
			local bucket_count
			if cumulative then
				bucket_count = value
			else
				bucket_count = value - prev_bucket_count
				prev_bucket_count = value
			end
			if bucket_threshold == "+Inf" then
				t_insert(buckets, {threshold = 1/0, count = bucket_count})
			elseif bucket_threshold ~= nil then
				t_insert(buckets, {threshold = tonumber(bucket_threshold), count = bucket_count})
			end
		end
	end

	if #buckets == 0 or not creation_timestamp or not sum or not count then
		print("[no data or not a histogram]")
		return false
	end

	local graph_width, graph_height, wscale = #buckets, 10, 1;
	if graph_width < 8 then
		wscale = 8
	elseif graph_width < 16 then
		wscale = 4
	elseif graph_width < 32 then
		wscale = 2
	end
	local eighth_chars = "   ▁▂▃▄▅▆▇█";

	local max_bin_samples = 0
	for _, bucket in ipairs(buckets) do
		if bucket.count > max_bin_samples then
			max_bin_samples = bucket.count
		end
	end

	print("");
	print(prefix)
	print(("_"):rep(graph_width*wscale).." "..max_bin_samples);
	for row = graph_height, 1, -1 do
		local row_chars = {};
		local min_eighths, max_eighths = 8, 0;
		for i = 1, #buckets do
			local char_eighths = math.ceil(math.max(math.min((graph_height/(max_bin_samples/buckets[i].count))-(row-1), 1), 0)*8);
			if char_eighths < min_eighths then
				min_eighths = char_eighths;
			end
			if char_eighths > max_eighths then
				max_eighths = char_eighths;
			end
			if char_eighths == 0 then
				row_chars[i] = ("-"):rep(wscale);
			else
				local char = eighth_chars:sub(char_eighths*3+1, char_eighths*3+3);
				row_chars[i] = char:rep(wscale);
			end
		end
		print(table.concat(row_chars).."|- "..string.format("%.8g", math.ceil((max_bin_samples/graph_height)*(row-0.5))));
	end

	local legend_pat = string.format("%%%d.%dg", wscale-1, wscale-1)
	local row = {}
	for i = 1, #buckets do
		local threshold = buckets[i].threshold
		t_insert(row, legend_pat:format(threshold))
	end
	t_insert(row, " " .. metric_family.unit)
	print(t_concat(row, "/"))

	return true
end

function stats_methods:render_single_fancy_histogram(print, prefix, metric_family, metric)
	return self:render_single_fancy_histogram_ex(print, prefix, metric_family, metric, false)
end

function stats_methods:render_single_fancy_histogram_cf(print, prefix, metric_family, metric)
	-- cf = cumulative frequency
	return self:render_single_fancy_histogram_ex(print, prefix, metric_family, metric, true)
end

function stats_methods:cfgraph()
	for _, stat_info in ipairs(self) do
		local family_name, metric_family = unpack(stat_info, 1, 2)
		local function print(s)
			table.insert(stat_info.output, s);
		end

		if not self:render_family(print, family_name, metric_family, self.render_single_fancy_histogram_cf) then
			return self
		end
	end
	return self;
end

function stats_methods:histogram()
	for _, stat_info in ipairs(self) do
		local family_name, metric_family = unpack(stat_info, 1, 2)
		local function print(s)
			table.insert(stat_info.output, s);
		end

		if not self:render_family(print, family_name, metric_family, self.render_single_fancy_histogram) then
			return self
		end
	end
	return self;
end

function stats_methods:render_single_counter(print, prefix, metric_family, metric)
	local created_timestamp, current_value
	for suffix, _, value in metric:iter_samples() do
		if suffix == "_created" then
			created_timestamp = value
		elseif suffix == "_total" then
			current_value = value
		end
	end
	if current_value and created_timestamp then
		local base_unit = short_units[metric_family.unit] or metric_family.unit
		local unit = base_unit .. "/s"
		local factor = 1
		if base_unit == "s" then
			-- be smart!
			unit = "%"
			factor = 100
		elseif base_unit == "" then
			unit = "events/s"
		end
		print(("%-50s %s"):format(prefix, format_number(factor * current_value / (self.now - created_timestamp), unit.." [avg]")));
	end
end

function stats_methods:render_single_gauge(print, prefix, metric_family, metric)
	local current_value
	for _, _, value in metric:iter_samples() do
		current_value = value
	end
	if current_value then
		local unit = short_units[metric_family.unit] or metric_family.unit
		print(("%-50s %s"):format(prefix, format_number(current_value, unit)));
	end
end

function stats_methods:render_single_summary(print, prefix, metric_family, metric)
	local sum, count
	for suffix, _, value in metric:iter_samples() do
		if suffix == "_sum" then
			sum = value
		elseif suffix == "_count" then
			count = value
		end
	end
	if sum and count then
		local unit = short_units[metric_family.unit] or metric_family.unit
		if count == 0 then
			print(("%-50s %s"):format(prefix, "no obs."));
		else
			print(("%-50s %s"):format(prefix, format_number(sum / count, unit.."/event [avg]")));
		end
	end
end

function stats_methods:render_family(print, family_name, metric_family, render_func)
	local labelkeys = metric_family.label_keys
	if #labelkeys > 0 then
		print(family_name)
		for labelset, metric in metric_family:iter_metrics() do
			local labels = {}
			for i, k in ipairs(labelkeys) do
				local v = labelset[i]
				t_insert(labels, ("%s=%s"):format(k, v))
			end
			local prefix = "  "..t_concat(labels, " ")
			render_func(self, print, prefix, metric_family, metric)
		end
	else
		for _, metric in metric_family:iter_metrics() do
			render_func(self, print, family_name, metric_family, metric)
		end
	end
end

local function stats_tostring(stats)
	local print = stats.session.print;
	for _, stat_info in ipairs(stats) do
		if #stat_info.output > 0 then
			print("\n#"..stat_info[1]);
			print("");
			for _, v in ipairs(stat_info.output) do
				print(v);
			end
			print("");
		else
			local metric_family = stat_info[2]
			if metric_family.type_ == "counter" then
				stats:render_family(print, stat_info[1], metric_family, stats.render_single_counter)
			elseif metric_family.type_ == "gauge" or metric_family.type_ == "unknown" then
				stats:render_family(print, stat_info[1], metric_family, stats.render_single_gauge)
			elseif metric_family.type_ == "summary" or metric_family.type_ == "histogram" then
				stats:render_family(print, stat_info[1], metric_family, stats.render_single_summary)
			end
		end
	end
	return #stats.." statistics displayed";
end

local stats_mt = {__index = stats_methods, __tostring = stats_tostring }
local function new_stats_context(self)
	-- TODO: instead of now(), it might be better to take the time of the last
	-- interval, if the statistics backend is set to use periodic collection
	-- Otherwise we get strange stuff like average cpu usage decreasing until
	-- the next sample and so on.
	return setmetatable({ session = self.session, stats = true, now = time.now() }, stats_mt);
end

function def_env.stats:show(name_filter)
	local statsman = require "prosody.core.statsmanager"
	local collect = statsman.collect
	if collect then
		-- force collection if in manual mode
		collect()
	end
	local metric_registry = statsman.get_metric_registry();
	local displayed_stats = new_stats_context(self);
	for family_name, metric_family in iterators.sorted_pairs(metric_registry:get_metric_families()) do
		if not name_filter or family_name:match(name_filter) then
			table.insert(displayed_stats, {
				family_name,
				metric_family,
				output = {}
			})
		end
	end
	return displayed_stats;
end


function module.unload()
	stanza_watchers.cleanup();
end


-------------

function printbanner(session)
	local option = module:get_option_string("console_banner", "full");
	if option == "full" or option == "graphic" then
		session.print [[
                   ____                \   /     _
                    |  _ \ _ __ ___  ___  _-_   __| |_   _
                    | |_) | '__/ _ \/ __|/ _ \ / _` | | | |
                    |  __/| | | (_) \__ \ |_| | (_| | |_| |
                    |_|   |_|  \___/|___/\___/ \__,_|\__, |
                    A study in simplicity            |___/

]]
	end
	if option == "short" or option == "full" then
	session.print("Welcome to the Prosody administration console. For a list of commands, type: help");
	session.print("You may find more help on using this console in our online documentation at ");
	session.print("https://prosody.im/doc/console\n");
	end
	if option ~= "short" and option ~= "full" and option ~= "graphic" then
		session.print(option);
	end
end