config.c 213 KB
Newer Older
1
 /* Copyright (c) 2001 Matej Pfajfar.
Roger Dingledine's avatar
Roger Dingledine committed
2
 * Copyright (c) 2001-2004, Roger Dingledine.
3
 * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
4
 * Copyright (c) 2007-2013, The Tor Project, Inc. */
5
/* See LICENSE for licensing information */
6

Nick Mathewson's avatar
Nick Mathewson committed
7
/**
8
9
 * \file config.c
 * \brief Code to parse and interpret configuration files.
Nick Mathewson's avatar
Nick Mathewson committed
10
11
 **/

12
13
#define CONFIG_PRIVATE

Roger Dingledine's avatar
Roger Dingledine committed
14
#include "or.h"
15
#include "addressmap.h"
16
#include "channel.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
17
#include "circuitbuild.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
18
#include "circuitlist.h"
19
20
#include "circuitmux.h"
#include "circuitmux_ewma.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
21
#include "config.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
22
#include "connection.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
23
#include "connection_edge.h"
24
#include "connection_or.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
25
#include "control.h"
26
#include "confparse.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
27
#include "cpuworker.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
28
#include "dirserv.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
29
#include "dirvote.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
30
#include "dns.h"
31
#include "entrynodes.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
32
#include "geoip.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
33
#include "hibernate.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
34
#include "main.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
35
#include "networkstatus.h"
36
#include "nodelist.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
37
#include "policies.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
38
#include "relay.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
39
#include "rendclient.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
40
#include "rendservice.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
41
#include "rephist.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
42
#include "router.h"
43
#include "util.h"
Sebastian Hahn's avatar
Sebastian Hahn committed
44
#include "routerlist.h"
45
#include "routerset.h"
46
#include "statefile.h"
47
#include "transports.h"
48
#ifdef _WIN32
49
50
#include <shlobj.h>
#endif
Roger Dingledine's avatar
Roger Dingledine committed
51

52
53
54
55
56
#include "procmon.h"

/* From main.c */
extern int quiet_level;

57
58
/** A list of abbreviations and aliases to map command-line options, obsolete
 * option names, or alternative option names, to their current values. */
59
static config_abbrev_t option_abbrevs_[] = {
60
61
62
63
  PLURAL(AuthDirBadDirCC),
  PLURAL(AuthDirBadExitCC),
  PLURAL(AuthDirInvalidCC),
  PLURAL(AuthDirRejectCC),
64
  PLURAL(ExitNode),
65
  PLURAL(EntryNode),
66
67
  PLURAL(ExcludeNode),
  PLURAL(FirewallPort),
68
  PLURAL(LongLivedPort),
69
70
  PLURAL(HiddenServiceNode),
  PLURAL(HiddenServiceExcludeNode),
71
  PLURAL(NumCPU),
72
73
  PLURAL(RendNode),
  PLURAL(RendExcludeNode),
74
75
  PLURAL(StrictEntryNode),
  PLURAL(StrictExitNode),
76
  PLURAL(StrictNode),
77
  { "l", "Log", 1, 0},
78
  { "AllowUnverifiedNodes", "AllowInvalidNodes", 0, 0},
79
80
  { "AutomapHostSuffixes", "AutomapHostsSuffixes", 0, 0},
  { "AutomapHostOnResolve", "AutomapHostsOnResolve", 0, 0},
81
82
83
  { "BandwidthRateBytes", "BandwidthRate", 0, 0},
  { "BandwidthBurstBytes", "BandwidthBurst", 0, 0},
  { "DirFetchPostPeriod", "StatusFetchPeriod", 0, 0},
84
  { "DirServer", "DirAuthority", 0, 0}, /* XXXX024 later, make this warn? */
85
  { "MaxConn", "ConnLimit", 0, 1},
86
87
88
  { "ORBindAddress", "ORListenAddress", 0, 0},
  { "DirBindAddress", "DirListenAddress", 0, 0},
  { "SocksBindAddress", "SocksListenAddress", 0, 0},
89
90
91
92
  { "UseHelperNodes", "UseEntryGuards", 0, 0},
  { "NumHelperNodes", "NumEntryGuards", 0, 0},
  { "UseEntryNodes", "UseEntryGuards", 0, 0},
  { "NumEntryNodes", "NumEntryGuards", 0, 0},
93
94
  { "ResolvConf", "ServerDNSResolvConfFile", 0, 1},
  { "SearchDomains", "ServerDNSSearchDomains", 0, 1},
95
  { "ServerDNSAllowBrokenResolvConf", "ServerDNSAllowBrokenConfig", 0, 0},
96
  { "PreferTunnelledDirConns", "PreferTunneledDirConns", 0, 0},
97
  { "BridgeAuthoritativeDirectory", "BridgeAuthoritativeDir", 0, 0},
98
  { "HashedControlPassword", "__HashedControlSessionPassword", 1, 0},
99
100
  { "StrictEntryNodes", "StrictNodes", 0, 1},
  { "StrictExitNodes", "StrictNodes", 0, 1},
101
  { "VirtualAddrNetwork", "VirtualAddrNetworkIPv4", 0, 0},
102
  { "_UseFilteringSSLBufferevents", "UseFilteringSSLBufferevents", 0, 1},
103
104
  { NULL, NULL, 0, 0},
};
105

Nick Mathewson's avatar
Nick Mathewson committed
106
107
108
109
/** An entry for config_vars: "The option <b>name</b> has type
 * CONFIG_TYPE_<b>conftype</b>, and corresponds to
 * or_options_t.<b>member</b>"
 */
110
111
#define VAR(name,conftype,member,initvalue)                             \
  { name, CONFIG_TYPE_ ## conftype, STRUCT_OFFSET(or_options_t, member), \
112
      initvalue }
113
114
115
/** As VAR, but the option name and member name are the same. */
#define V(member,conftype,initvalue)                                    \
  VAR(#member, conftype, member, initvalue)
Nick Mathewson's avatar
Nick Mathewson committed
116
/** An entry for config_vars: "The option <b>name</b> is obsolete." */
117
#define OBSOLETE(name) { name, CONFIG_TYPE_OBSOLETE, 0, NULL }
118

119
120
121
#define VPORT(member,conftype,initvalue)                                    \
  VAR(#member, conftype, member ## _lines, initvalue)

Nick Mathewson's avatar
Nick Mathewson committed
122
123
124
125
/** Array of configuration options.  Until we disallow nonstandard
 * abbreviations, order is significant, since the first matching option will
 * be chosen first.
 */
126
static config_var_t option_vars_[] = {
127
  OBSOLETE("AccountingMaxKB"),
128
129
130
  V(AccountingMax,               MEMUNIT,  "0 bytes"),
  V(AccountingStart,             STRING,   NULL),
  V(Address,                     STRING,   NULL),
131
  V(AllowDotExit,                BOOL,     "0"),
132
133
  V(AllowInvalidNodes,           CSV,      "middle,rendezvous"),
  V(AllowNonRFC953Hostnames,     BOOL,     "0"),
134
135
  V(AllowSingleHopCircuits,      BOOL,     "0"),
  V(AllowSingleHopExits,         BOOL,     "0"),
136
137
138
  V(AlternateBridgeAuthority,    LINELIST, NULL),
  V(AlternateDirAuthority,       LINELIST, NULL),
  V(AlternateHSAuthority,        LINELIST, NULL),
139
  V(AssumeReachable,             BOOL,     "0"),
140
  V(AuthDirBadDir,               LINELIST, NULL),
141
  V(AuthDirBadDirCCs,            CSV,      ""),
142
  V(AuthDirBadExit,              LINELIST, NULL),
143
  V(AuthDirBadExitCCs,           CSV,      ""),
144
  V(AuthDirInvalid,              LINELIST, NULL),
145
  V(AuthDirInvalidCCs,           CSV,      ""),
146
  V(AuthDirFastGuarantee,        MEMUNIT,  "100 KB"),
147
  V(AuthDirGuardBWGuarantee,     MEMUNIT,  "250 KB"),
148
  V(AuthDirReject,               LINELIST, NULL),
149
  V(AuthDirRejectCCs,            CSV,      ""),
150
  V(AuthDirRejectUnlisted,       BOOL,     "0"),
151
  V(AuthDirListBadDirs,          BOOL,     "0"),
152
  V(AuthDirListBadExits,         BOOL,     "0"),
153
154
  V(AuthDirMaxServersPerAddr,    UINT,     "2"),
  V(AuthDirMaxServersPerAuthAddr,UINT,     "5"),
155
  V(AuthDirHasIPv6Connectivity,  BOOL,     "0"),
156
157
158
159
  VAR("AuthoritativeDirectory",  BOOL, AuthoritativeDir,    "0"),
  V(AutomapHostsOnResolve,       BOOL,     "0"),
  V(AutomapHostsSuffixes,        CSV,      ".onion,.exit"),
  V(AvoidDiskWrites,             BOOL,     "0"),
160
161
  V(BandwidthBurst,              MEMUNIT,  "1 GB"),
  V(BandwidthRate,               MEMUNIT,  "1 GB"),
162
163
  V(BridgeAuthoritativeDir,      BOOL,     "0"),
  VAR("Bridge",                  LINELIST, Bridges,    NULL),
164
  V(BridgePassword,              STRING,   NULL),
165
  V(BridgeRecordUsageByCountry,  BOOL,     "1"),
166
  V(BridgeRelay,                 BOOL,     "0"),
167
  V(CellStatistics,              BOOL,     "0"),
168
  V(LearnCircuitBuildTimeout,    BOOL,     "1"),
169
  V(CircuitBuildTimeout,         INTERVAL, "0"),
170
  V(CircuitIdleTimeout,          INTERVAL, "1 hour"),
171
  V(CircuitStreamTimeout,        INTERVAL, "0"),
172
  V(CircuitPriorityHalflife,     DOUBLE,  "-100.0"), /*negative:'Use default'*/
173
174
  V(ClientDNSRejectInternalAddresses, BOOL,"1"),
  V(ClientOnly,                  BOOL,     "0"),
175
  V(ClientPreferIPv6ORPort,      BOOL,     "0"),
176
  V(ClientRejectInternalAddresses, BOOL,   "1"),
177
  V(ClientTransportPlugin,       LINELIST, NULL),
178
  V(ClientUseIPv6,               BOOL,     "0"),
179
  V(ConsensusParams,             STRING,   NULL),
180
  V(ConnLimit,                   UINT,     "1000"),
181
  V(ConnDirectionStatistics,     BOOL,     "0"),
182
183
184
185
  V(ConstrainedSockets,          BOOL,     "0"),
  V(ConstrainedSockSize,         MEMUNIT,  "8192"),
  V(ContactInfo,                 STRING,   NULL),
  V(ControlListenAddress,        LINELIST, NULL),
186
  VPORT(ControlPort,                 LINELIST, NULL),
187
  V(ControlPortFileGroupReadable,BOOL,     "0"),
188
  V(ControlPortWriteToFile,      FILENAME, NULL),
189
  V(ControlSocket,               LINELIST, NULL),
190
  V(ControlSocketsGroupWritable, BOOL,     "0"),
191
192
193
  V(CookieAuthentication,        BOOL,     "0"),
  V(CookieAuthFileGroupReadable, BOOL,     "0"),
  V(CookieAuthFile,              STRING,   NULL),
194
  V(CountPrivateBandwidth,       BOOL,     "0"),
195
  V(DataDirectory,               FILENAME, NULL),
196
  OBSOLETE("DebugLogFile"),
197
  V(DisableNetwork,              BOOL,     "0"),
198
  V(DirAllowPrivateAddresses,    BOOL,     "0"),
199
  V(TestingAuthDirTimeToLearnReachability, INTERVAL, "30 minutes"),
200
  V(DirListenAddress,            LINELIST, NULL),
201
  OBSOLETE("DirFetchPeriod"),
202
  V(DirPolicy,                   LINELIST, NULL),
203
  VPORT(DirPort,                     LINELIST, NULL),
204
  V(DirPortFrontPage,            FILENAME, NULL),
205
  OBSOLETE("DirPostPeriod"),
206
207
208
209
  OBSOLETE("DirRecordUsageByCountry"),
  OBSOLETE("DirRecordUsageGranularity"),
  OBSOLETE("DirRecordUsageRetainIPs"),
  OBSOLETE("DirRecordUsageSaveInterval"),
210
  V(DirReqStatistics,            BOOL,     "1"),
211
  VAR("DirAuthority",            LINELIST, DirAuthorities, NULL),
212
  V(DirAuthorityFallbackRate,    DOUBLE,   "1.0"),
213
  V(DisableAllSwap,              BOOL,     "0"),
214
  V(DisableDebuggerAttachment,   BOOL,     "1"),
215
  V(DisableIOCP,                 BOOL,     "1"),
216
  V(DisableV2DirectoryInfo_,     BOOL,     "0"),
217
  V(DynamicDHGroups,             BOOL,     "0"),
218
  VPORT(DNSPort,                     LINELIST, NULL),
219
220
221
  V(DNSListenAddress,            LINELIST, NULL),
  V(DownloadExtraInfo,           BOOL,     "0"),
  V(EnforceDistinctSubnets,      BOOL,     "1"),
222
  V(EntryNodes,                  ROUTERSET,   NULL),
223
  V(EntryStatistics,             BOOL,     "0"),
224
  V(TestingEstimatedDescriptorPropagationTime, INTERVAL, "10 minutes"),
225
226
  V(ExcludeNodes,                ROUTERSET, NULL),
  V(ExcludeExitNodes,            ROUTERSET, NULL),
227
  V(ExcludeSingleHopRelays,      BOOL,     "1"),
228
  V(ExitNodes,                   ROUTERSET, NULL),
229
230
  V(ExitPolicy,                  LINELIST, NULL),
  V(ExitPolicyRejectPrivate,     BOOL,     "1"),
231
  V(ExitPortStatistics,          BOOL,     "0"),
232
  V(ExtendAllowPrivateAddresses, BOOL,     "0"),
233
  V(ExtraInfoStatistics,         BOOL,     "1"),
234
  V(FallbackDir,                 LINELIST, NULL),
235

236
  OBSOLETE("FallbackNetworkstatusFile"),
237
238
239
  V(FascistFirewall,             BOOL,     "0"),
  V(FirewallPorts,               CSV,      ""),
  V(FastFirstHopPK,              BOOL,     "1"),
240
  V(FetchDirInfoEarly,           BOOL,     "0"),
241
  V(FetchDirInfoExtraEarly,      BOOL,     "0"),
242
243
244
  V(FetchServerDescriptors,      BOOL,     "1"),
  V(FetchHidServDescriptors,     BOOL,     "1"),
  V(FetchUselessDescriptors,     BOOL,     "0"),
245
  V(FetchV2Networkstatus,        BOOL,     "0"),
246
  V(GeoIPExcludeUnknown,         AUTOBOOL, "auto"),
247
#ifdef _WIN32
248
  V(GeoIPFile,                   FILENAME, "<default>"),
nils's avatar
nils committed
249
  V(GeoIPv6File,                 FILENAME, "<default>"),
250
#else
251
252
  V(GeoIPFile,                   FILENAME,
    SHARE_DATADIR PATH_SEPARATOR "tor" PATH_SEPARATOR "geoip"),
nils's avatar
nils committed
253
254
  V(GeoIPv6File,                 FILENAME,
    SHARE_DATADIR PATH_SEPARATOR "tor" PATH_SEPARATOR "geoip6"),
255
#endif
256
  OBSOLETE("GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays"),
257
  OBSOLETE("Group"),
258
  V(GuardLifetime,               INTERVAL, "0 minutes"),
259
  V(HardwareAccel,               BOOL,     "0"),
260
  V(HeartbeatPeriod,             INTERVAL, "6 hours"),
261
262
  V(AccelName,                   STRING,   NULL),
  V(AccelDir,                    FILENAME, NULL),
263
  V(HashedControlPassword,       LINELIST, NULL),
264
  V(HidServDirectoryV2,          BOOL,     "1"),
Nick Mathewson's avatar
Nick Mathewson committed
265
  VAR("HiddenServiceDir",    LINELIST_S, RendConfigLines,    NULL),
266
267
  OBSOLETE("HiddenServiceExcludeNodes"),
  OBSOLETE("HiddenServiceNodes"),
Nick Mathewson's avatar
Nick Mathewson committed
268
269
  VAR("HiddenServiceOptions",LINELIST_V, RendConfigLines,    NULL),
  VAR("HiddenServicePort",   LINELIST_S, RendConfigLines,    NULL),
270
  VAR("HiddenServiceVersion",LINELIST_S, RendConfigLines,    NULL),
271
  VAR("HiddenServiceAuthorizeClient",LINELIST_S,RendConfigLines, NULL),
272
  V(HidServAuth,                 LINELIST, NULL),
273
  V(HSAuthoritativeDir,          BOOL,     "0"),
274
  OBSOLETE("HSAuthorityRecordStats"),
275
  V(CloseHSClientCircuitsImmediatelyOnTimeout, BOOL, "0"),
276
  V(CloseHSServiceRendCircuitsImmediatelyOnTimeout, BOOL, "0"),
277
278
279
280
  V(HTTPProxy,                   STRING,   NULL),
  V(HTTPProxyAuthenticator,      STRING,   NULL),
  V(HTTPSProxy,                  STRING,   NULL),
  V(HTTPSProxyAuthenticator,     STRING,   NULL),
281
  V(IPv6Exit,                    BOOL,     "0"),
282
  VAR("ServerTransportPlugin",   LINELIST, ServerTransportPlugin,  NULL),
283
  V(ServerTransportListenAddr,   LINELIST, NULL),
284
285
286
287
  V(Socks4Proxy,                 STRING,   NULL),
  V(Socks5Proxy,                 STRING,   NULL),
  V(Socks5ProxyUsername,         STRING,   NULL),
  V(Socks5ProxyPassword,         STRING,   NULL),
288
  OBSOLETE("IgnoreVersion"),
289
290
  V(KeepalivePeriod,             INTERVAL, "5 minutes"),
  VAR("Log",                     LINELIST, Logs,             NULL),
291
  V(LogMessageDomains,           BOOL,     "0"),
292
  OBSOLETE("LinkPadding"),
293
294
  OBSOLETE("LogLevel"),
  OBSOLETE("LogFile"),
295
  V(LogTimeGranularity,          MSEC_INTERVAL, "1 second"),
296
  V(LongLivedPorts,              CSV,
Nick Mathewson's avatar
Nick Mathewson committed
297
        "21,22,706,1863,5050,5190,5222,5223,6523,6667,6697,8300"),
298
299
300
  VAR("MapAddress",              LINELIST, AddressMap,           NULL),
  V(MaxAdvertisedBandwidth,      MEMUNIT,  "1 GB"),
  V(MaxCircuitDirtiness,         INTERVAL, "10 minutes"),
301
  V(MaxClientCircuitsPending,    UINT,     "32"),
302
303
  OBSOLETE("MaxOnionsPending"),
  V(MaxOnionQueueDelay,          MSEC_INTERVAL, "1750 msec"),
304
  V(MinMeasuredBWsForAuthToIgnoreAdvertised, INT, "500"),
305
  OBSOLETE("MonthlyAccountingStart"),
306
307
  V(MyFamily,                    STRING,   NULL),
  V(NewCircuitPeriod,            INTERVAL, "30 seconds"),
308
  VAR("NamingAuthoritativeDirectory",BOOL, NamingAuthoritativeDir, "0"),
309
  V(NATDListenAddress,           LINELIST, NULL),
310
  VPORT(NATDPort,                    LINELIST, NULL),
311
  V(Nickname,                    STRING,   NULL),
312
  V(WarnUnsafeSocks,              BOOL,     "1"),
Sebastian Hahn's avatar
Sebastian Hahn committed
313
  OBSOLETE("NoPublish"),
314
  VAR("NodeFamily",              LINELIST, NodeFamilies,         NULL),
315
  V(NumCPUs,                     UINT,     "0"),
316
  V(NumDirectoryGuards,          UINT,     "3"),
317
318
  V(NumEntryGuards,              UINT,     "3"),
  V(ORListenAddress,             LINELIST, NULL),
319
  VPORT(ORPort,                      LINELIST, NULL),
320
  V(OutboundBindAddress,         LINELIST,   NULL),
321

322
  OBSOLETE("PathBiasDisableRate"),
323
324
  V(PathBiasCircThreshold,       INT,      "-1"),
  V(PathBiasNoticeRate,          DOUBLE,   "-1"),
325
  V(PathBiasWarnRate,            DOUBLE,   "-1"),
326
  V(PathBiasExtremeRate,         DOUBLE,   "-1"),
327
  V(PathBiasScaleThreshold,      INT,      "-1"),
328
329
  OBSOLETE("PathBiasScaleFactor"),
  OBSOLETE("PathBiasMultFactor"),
330
  V(PathBiasDropGuards,          AUTOBOOL, "0"),
331
332
333
334
335
336
  OBSOLETE("PathBiasUseCloseCounts"),

  V(PathBiasUseThreshold,       INT,      "-1"),
  V(PathBiasNoticeUseRate,          DOUBLE,   "-1"),
  V(PathBiasExtremeUseRate,         DOUBLE,   "-1"),
  V(PathBiasScaleUseThreshold,      INT,      "-1"),
337

338
  V(PathsNeededToBuildCircuits,  DOUBLE,   "-1"),
339
  OBSOLETE("PathlenCoinWeight"),
340
341
  V(PerConnBWBurst,              MEMUNIT,  "0"),
  V(PerConnBWRate,               MEMUNIT,  "0"),
342
  V(PidFile,                     STRING,   NULL),
343
  V(TestingTorNetwork,           BOOL,     "0"),
344
  V(TestingMinExitFlagThreshold, MEMUNIT,  "0"),
345
  V(TestingMinFastFlagThreshold, MEMUNIT,  "0"),
346
  V(OptimisticData,              AUTOBOOL, "auto"),
347
348
  V(PortForwarding,              BOOL,     "0"),
  V(PortForwardingHelper,        FILENAME, "tor-fw-helper"),
Roger Dingledine's avatar
Roger Dingledine committed
349
  V(PreferTunneledDirConns,      BOOL,     "1"),
350
  V(ProtocolWarnings,            BOOL,     "0"),
351
  V(PublishServerDescriptor,     CSV,      "1"),
352
353
354
355
356
357
358
  V(PublishHidServDescriptors,   BOOL,     "1"),
  V(ReachableAddresses,          LINELIST, NULL),
  V(ReachableDirAddresses,       LINELIST, NULL),
  V(ReachableORAddresses,        LINELIST, NULL),
  V(RecommendedVersions,         LINELIST, NULL),
  V(RecommendedClientVersions,   LINELIST, NULL),
  V(RecommendedServerVersions,   LINELIST, NULL),
359
  OBSOLETE("RedirectExit"),
360
  V(RefuseUnknownExits,          AUTOBOOL, "auto"),
361
  V(RejectPlaintextPorts,        CSV,      ""),
362
363
  V(RelayBandwidthBurst,         MEMUNIT,  "0"),
  V(RelayBandwidthRate,          MEMUNIT,  "0"),
364
365
  OBSOLETE("RendExcludeNodes"),
  OBSOLETE("RendNodes"),
366
367
  V(RendPostPeriod,              INTERVAL, "1 hour"),
  V(RephistTrackTime,            INTERVAL, "24 hours"),
368
  OBSOLETE("RouterFile"),
369
  V(RunAsDaemon,                 BOOL,     "0"),
370
371
//  V(RunTesting,                  BOOL,     "0"),
  OBSOLETE("RunTesting"), // currently unused
372
  V(SafeLogging,                 STRING,   "1"),
373
  V(SafeSocks,                   BOOL,     "0"),
374
  V(ServerDNSAllowBrokenConfig,  BOOL,     "1"),
375
376
  V(ServerDNSAllowNonRFC953Hostnames, BOOL,"0"),
  V(ServerDNSDetectHijacking,    BOOL,     "1"),
377
  V(ServerDNSRandomizeCase,      BOOL,     "1"),
378
379
380
  V(ServerDNSResolvConfFile,     STRING,   NULL),
  V(ServerDNSSearchDomains,      BOOL,     "0"),
  V(ServerDNSTestAddresses,      CSV,
381
      "www.google.com,www.mit.edu,www.yahoo.com,www.slashdot.org"),
382
383
384
  V(ShutdownWaitLength,          INTERVAL, "30 seconds"),
  V(SocksListenAddress,          LINELIST, NULL),
  V(SocksPolicy,                 LINELIST, NULL),
385
  VPORT(SocksPort,                   LINELIST, NULL),
386
  V(SocksTimeout,                INTERVAL, "2 minutes"),
387
  V(SSLKeyLifetime,              INTERVAL, "0"),
388
  OBSOLETE("StatusFetchPeriod"),
389
  V(StrictNodes,                 BOOL,     "0"),
390
  OBSOLETE("SysLog"),
391
  V(TestSocks,                   BOOL,     "0"),
392
  OBSOLETE("TestVia"),
393
  V(TokenBucketRefillInterval,   MSEC_INTERVAL, "100 msec"),
394
  V(Tor2webMode,                 BOOL,     "0"),
395
  V(TLSECGroup,                  STRING,   NULL),
396
397
  V(TrackHostExits,              CSV,      NULL),
  V(TrackHostExitsExpire,        INTERVAL, "30 minutes"),
398
  OBSOLETE("TrafficShaping"),
399
  V(TransListenAddress,          LINELIST, NULL),
400
  VPORT(TransPort,                   LINELIST, NULL),
Roger Dingledine's avatar
Roger Dingledine committed
401
  V(TunnelDirConns,              BOOL,     "1"),
402
  V(UpdateBridgesFromAuthority,  BOOL,     "0"),
403
  V(UseBridges,                  BOOL,     "0"),
404
  V(UseEntryGuards,              BOOL,     "1"),
405
  V(UseEntryGuardsAsDirGuards,   BOOL,     "1"),
406
  V(UseMicrodescriptors,         AUTOBOOL, "auto"),
407
  V(UseNTorHandshake,            AUTOBOOL, "1"),
408
  V(User,                        STRING,   NULL),
409
  V(UserspaceIOCPBuffers,        BOOL,     "0"),
410
  VAR("V1AuthoritativeDirectory",BOOL, V1AuthoritativeDir,   "0"),
411
  VAR("V2AuthoritativeDirectory",BOOL, V2AuthoritativeDir,   "0"),
412
  VAR("V3AuthoritativeDirectory",BOOL, V3AuthoritativeDir,   "0"),
413
414
415
  V(TestingV3AuthInitialVotingInterval, INTERVAL, "30 minutes"),
  V(TestingV3AuthInitialVoteDelay, INTERVAL, "5 minutes"),
  V(TestingV3AuthInitialDistDelay, INTERVAL, "5 minutes"),
416
417
418
419
  V(V3AuthVotingInterval,        INTERVAL, "1 hour"),
  V(V3AuthVoteDelay,             INTERVAL, "5 minutes"),
  V(V3AuthDistDelay,             INTERVAL, "5 minutes"),
  V(V3AuthNIntervalsValid,       UINT,     "3"),
420
  V(V3AuthUseLegacyKey,          BOOL,     "0"),
421
  V(V3BandwidthsFile,            FILENAME, NULL),
422
  VAR("VersioningAuthoritativeDirectory",BOOL,VersioningAuthoritativeDir, "0"),
423
424
  V(VirtualAddrNetworkIPv4,      STRING,   "127.192.0.0/10"),
  V(VirtualAddrNetworkIPv6,      STRING,   "[FE80::]/10"),
425
  V(WarnPlaintextPorts,          CSV,      "23,109,110,143"),
426
  V(UseFilteringSSLBufferevents, BOOL,    "0"),
427
  VAR("__ReloadTorrcOnSIGHUP",   BOOL,  ReloadTorrcOnSIGHUP,      "1"),
428
429
430
  VAR("__AllDirActionsPrivate",  BOOL,  AllDirActionsPrivate,     "0"),
  VAR("__DisablePredictedCircuits",BOOL,DisablePredictedCircuits, "0"),
  VAR("__LeaveStreamsUnattached",BOOL,  LeaveStreamsUnattached,   "0"),
431
432
  VAR("__HashedControlSessionPassword", LINELIST, HashedControlSessionPassword,
      NULL),
433
  VAR("__OwningControllerProcess",STRING,OwningControllerProcess, NULL),
434
  V(MinUptimeHidServDirectoryV2, INTERVAL, "25 hours"),
435
  V(VoteOnHidServDirectoriesV2,  BOOL,     "1"),
436
  VAR("___UsingTestNetworkDefaults", BOOL, UsingTestNetworkDefaults_, "0"),
437

438
  { NULL, CONFIG_TYPE_OBSOLETE, 0, NULL }
439
};
440

441
442
/** Override default values with these if the user sets the TestingTorNetwork
 * option. */
443
static const config_var_t testing_tor_network_defaults[] = {
444
  V(ServerDNSAllowBrokenConfig,  BOOL,     "1"),
445
446
447
448
449
450
  V(DirAllowPrivateAddresses,    BOOL,     "1"),
  V(EnforceDistinctSubnets,      BOOL,     "0"),
  V(AssumeReachable,             BOOL,     "1"),
  V(AuthDirMaxServersPerAddr,    UINT,     "0"),
  V(AuthDirMaxServersPerAuthAddr,UINT,     "0"),
  V(ClientDNSRejectInternalAddresses, BOOL,"0"),
451
  V(ClientRejectInternalAddresses, BOOL,   "0"),
452
  V(CountPrivateBandwidth,       BOOL,     "1"),
453
  V(ExitPolicyRejectPrivate,     BOOL,     "0"),
454
  V(ExtendAllowPrivateAddresses, BOOL,     "1"),
455
456
457
  V(V3AuthVotingInterval,        INTERVAL, "5 minutes"),
  V(V3AuthVoteDelay,             INTERVAL, "20 seconds"),
  V(V3AuthDistDelay,             INTERVAL, "20 seconds"),
458
459
460
461
462
  V(TestingV3AuthInitialVotingInterval, INTERVAL, "5 minutes"),
  V(TestingV3AuthInitialVoteDelay, INTERVAL, "20 seconds"),
  V(TestingV3AuthInitialDistDelay, INTERVAL, "20 seconds"),
  V(TestingAuthDirTimeToLearnReachability, INTERVAL, "0 minutes"),
  V(TestingEstimatedDescriptorPropagationTime, INTERVAL, "0 minutes"),
463
  V(MinUptimeHidServDirectoryV2, INTERVAL, "0 minutes"),
464
  VAR("___UsingTestNetworkDefaults", BOOL, UsingTestNetworkDefaults_, "1"),
465

466
467
  { NULL, CONFIG_TYPE_OBSOLETE, 0, NULL }
};
468

469
#undef VAR
470
#undef V
471
472
#undef OBSOLETE

473
#ifdef _WIN32
474
475
static char *get_windows_conf_root(void);
#endif
476
477
static int options_validate(or_options_t *old_options,
                            or_options_t *options,
478
                            int from_setconf, char **msg);
479
480
481
482
static int options_act_reversible(const or_options_t *old_options, char **msg);
static int options_act(const or_options_t *old_options);
static int options_transition_allowed(const or_options_t *old,
                                      const or_options_t *new,
483
                                      char **msg);
484
485
486
487
static int options_transition_affects_workers(
      const or_options_t *old_options, const or_options_t *new_options);
static int options_transition_affects_descriptor(
      const or_options_t *old_options, const or_options_t *new_options);
488
static int check_nickname_list(const char *lst, const char *name, char **msg);
489

George Kadianakis's avatar
George Kadianakis committed
490
static int parse_client_transport_line(const char *line, int validate_only);
491
492

static int parse_server_transport_line(const char *line, int validate_only);
493
494
static char *get_bindaddr_from_transport_listen_line(const char *line,
                                                     const char *transport);
495
static int parse_dir_authority_line(const char *line,
496
                                 dirinfo_type_t required_type,
497
                                 int validate_only);
498
499
static int parse_dir_fallback_line(const char *line,
                                   int validate_only);
500
static void port_cfg_free(port_cfg_t *port);
501
static int parse_ports(or_options_t *options, int validate_only,
502
                              char **msg_out, int *n_ports_out);
503
504
505
static int check_server_ports(const smartlist_t *ports,
                              const or_options_t *options);

506
static int validate_data_directory(or_options_t *options);
507
508
static int write_configuration_file(const char *fname,
                                    const or_options_t *options);
509
static int options_init_logs(or_options_t *options, int validate_only);
510

511
static void init_libevent(const or_options_t *options);
512
static int opt_streq(const char *s1, const char *s2);
513
514
static int parse_outbound_addresses(or_options_t *options, int validate_only,
                                    char **msg);
Linus Nordberg's avatar
Linus Nordberg committed
515
516
static void config_maybe_load_geoip_files_(const or_options_t *options,
                                           const or_options_t *old_options);
517

518
/** Magic value for or_options_t. */
519
520
#define OR_OPTIONS_MAGIC 9090909

521
/** Configuration format for or_options_t. */
522
static config_format_t options_format = {
523
524
  sizeof(or_options_t),
  OR_OPTIONS_MAGIC,
525
526
527
  STRUCT_OFFSET(or_options_t, magic_),
  option_abbrevs_,
  option_vars_,
528
  (validate_fn_t)options_validate,
529
  NULL
530
531
};

532
533
534
535
536
/*
 * Functions to read and write the global options pointer.
 */

/** Command-line and config-file options. */
537
static or_options_t *global_options = NULL;
538
539
/** The fallback options_t object; this is where we look for options not
 * in torrc before we fall back to Tor's defaults. */
540
static or_options_t *global_default_options = NULL;
Roger Dingledine's avatar
Roger Dingledine committed
541
/** Name of most recently read torrc file. */
542
static char *torrc_fname = NULL;
543
/** Name of the most recently read torrc-defaults file.*/
544
static char *torrc_defaults_fname;
545
546
/** Configuration Options set by command line. */
static config_line_t *global_cmdline_options = NULL;
Roger Dingledine's avatar
Roger Dingledine committed
547
/** Contents of most recently read DirPortFrontPage file. */
548
static char *global_dirfrontpagecontents = NULL;
549
550
/** List of port_cfg_t for all configured ports. */
static smartlist_t *configured_ports = NULL;
551
552
553
554
555
556
557

/** Return the contents of our frontpage string, or NULL if not configured. */
const char *
get_dirportfrontpage(void)
{
  return global_dirfrontpagecontents;
}
558

559
560
/** Return the currently configured options. */
or_options_t *
561
get_options_mutable(void)
562
{
563
564
565
  tor_assert(global_options);
  return global_options;
}
566

567
568
569
570
571
572
573
/** Returns the currently configured options */
const or_options_t *
get_options(void)
{
  return get_options_mutable();
}

574
575
/** Change the current global options to contain <b>new_val</b> instead of
 * their current value; take action based on the new value; free the old value
576
 * as necessary.  Returns 0 on success, -1 on failure.
577
 */
578
int
579
set_options(or_options_t *new_val, char **msg)
580
{
581
582
583
  int i;
  smartlist_t *elements;
  config_line_t *line;
584
  or_options_t *old_options = global_options;
585
  global_options = new_val;
586
587
  /* Note that we pass the *old* options below, for comparison. It
   * pulls the new options directly out of global_options. */
588
589
  if (options_act_reversible(old_options, msg)<0) {
    tor_assert(*msg);
590
591
592
    global_options = old_options;
    return -1;
  }
593
  if (options_act(old_options) < 0) { /* acting on the options failed. die. */
594
    log_err(LD_BUG,
Roger Dingledine's avatar
Roger Dingledine committed
595
            "Acting on config options left us in a broken state. Dying.");
596
597
    exit(1);
  }
598
599
  /* Issues a CONF_CHANGED event to notify controller of the change. If Tor is
   * just starting up then the old_options will be undefined. */
600
  if (old_options && old_options != global_options) {
601
    elements = smartlist_new();
602
    for (i=0; options_format.vars[i].name; ++i) {
603
604
      const config_var_t *var = &options_format.vars[i];
      const char *var_name = var->name;
605
606
607
608
      if (var->type == CONFIG_TYPE_LINELIST_S ||
          var->type == CONFIG_TYPE_OBSOLETE) {
        continue;
      }
609
610
611
      if (!config_is_same(&options_format, new_val, old_options, var_name)) {
        line = config_get_assigned_option(&options_format, new_val,
                                          var_name, 1);
612
613

        if (line) {
Nick Mathewson's avatar
Nick Mathewson committed
614
615
616
          config_line_t *next;
          for (; line; line = next) {
            next = line->next;
617
618
            smartlist_add(elements, line->key);
            smartlist_add(elements, line->value);
Nick Mathewson's avatar
Nick Mathewson committed
619
            tor_free(line);
620
621
          }
        } else {
622
          smartlist_add(elements, tor_strdup(options_format.vars[i].name));
623
          smartlist_add(elements, NULL);
624
625
626
        }
      }
    }
627
    control_event_conf_changed(elements);
628
    SMARTLIST_FOREACH(elements, char *, cp, tor_free(cp));
629
630
    smartlist_free(elements);
  }
631
632
633

  if (old_options != global_options)
    config_free(&options_format, old_options);
634
635

  return 0;
636
637
}

638
extern const char tor_git_revision[]; /* from tor_main.c */
639

640
/** The version of this Tor process, as parsed. */
641
static char *the_tor_version = NULL;
Nick Mathewson's avatar
Nick Mathewson committed
642
643
/** A shorter version of this Tor process's version, for export in our router
 *  descriptor.  (Does not include the git version, if any.) */
644
static char *the_short_tor_version = NULL;
645

646
/** Return the current Tor version. */
647
648
649
const char *
get_version(void)
{
650
  if (the_tor_version == NULL) {
651
    if (strlen(tor_git_revision)) {
652
653
      tor_asprintf(&the_tor_version, "%s (git-%s)", get_short_version(),
                   tor_git_revision);
654
    } else {
655
      the_tor_version = tor_strdup(get_short_version());
656
657
    }
  }
658
  return the_tor_version;
659
660
}

661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
/** Return the current Tor version, without any git tag. */
const char *
get_short_version(void)
{

  if (the_short_tor_version == NULL) {
#ifdef TOR_BUILD_TAG
    tor_asprintf(&the_short_tor_version, "%s (%s)", VERSION, TOR_BUILD_TAG);
#else
    the_short_tor_version = tor_strdup(VERSION);
#endif
  }
  return the_short_tor_version;
}

676
677
678
679
680
/** Release additional memory allocated in options
 */
static void
or_options_free(or_options_t *options)
{
681
682
683
  if (!options)
    return;

684
  routerset_free(options->ExcludeExitNodesUnion_);
685
686
687
688
689
  if (options->NodeFamilySets) {
    SMARTLIST_FOREACH(options->NodeFamilySets, routerset_t *,
                      rs, routerset_free(rs));
    smartlist_free(options->NodeFamilySets);
  }
690
  tor_free(options->BridgePassword_AuthDigest_);
691
692
693
  config_free(&options_format, options);
}

694
695
/** Release all memory and resources held by global configuration structures.
 */
696
697
698
void
config_free_all(void)
{
699
700
  or_options_free(global_options);
  global_options = NULL;
701
702
  or_options_free(global_default_options);
  global_default_options = NULL;
703
704
705
706

  config_free_lines(global_cmdline_options);
  global_cmdline_options = NULL;

707
708
  if (configured_ports) {
    SMARTLIST_FOREACH(configured_ports,
709
                      port_cfg_t *, p, port_cfg_free(p));
710
711
    smartlist_free(configured_ports);
    configured_ports = NULL;
712
713
  }

714
  tor_free(torrc_fname);
715
  tor_free(torrc_defaults_fname);
716
  tor_free(the_tor_version);
717
  tor_free(global_dirfrontpagecontents);
718
719
720

  tor_free(the_short_tor_version);
  tor_free(the_tor_version);
721
722
}

723
724
725
726
727
/** Make <b>address</b> -- a piece of information related to our operation as
 * a client -- safe to log according to the settings in options->SafeLogging,
 * and return it.
 *
 * (We return "[scrubbed]" if SafeLogging is "1", and address otherwise.)
728
729
 */
const char *
730
safe_str_client(const char *address)
731
{
732
  tor_assert(address);
733
  if (get_options()->SafeLogging_ == SAFELOG_SCRUB_ALL)
Sebastian Hahn's avatar