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- /* Copyright (c) 2001 Matej Pfajfar.
- * Copyright (c) 2001-2004, Roger Dingledine.
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2009, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- /**
- * \file config.c
- * \brief Code to parse and interpret configuration files.
- **/
- #define CONFIG_PRIVATE
- #include "or.h"
- #ifdef MS_WINDOWS
- #include <shlobj.h>
- #endif
- /** Enumeration of types which option values can take */
- typedef enum config_type_t {
- CONFIG_TYPE_STRING = 0, /**< An arbitrary string. */
- CONFIG_TYPE_FILENAME, /**< A filename: some prefixes get expanded. */
- CONFIG_TYPE_UINT, /**< A non-negative integer less than MAX_INT */
- CONFIG_TYPE_INTERVAL, /**< A number of seconds, with optional units*/
- CONFIG_TYPE_MEMUNIT, /**< A number of bytes, with optional units*/
- CONFIG_TYPE_DOUBLE, /**< A floating-point value */
- CONFIG_TYPE_BOOL, /**< A boolean value, expressed as 0 or 1. */
- CONFIG_TYPE_ISOTIME, /**< An ISO-formatted time relative to GMT. */
- CONFIG_TYPE_CSV, /**< A list of strings, separated by commas and
- * optional whitespace. */
- CONFIG_TYPE_LINELIST, /**< Uninterpreted config lines */
- CONFIG_TYPE_LINELIST_S, /**< Uninterpreted, context-sensitive config lines,
- * mixed with other keywords. */
- CONFIG_TYPE_LINELIST_V, /**< Catch-all "virtual" option to summarize
- * context-sensitive config lines when fetching.
- */
- CONFIG_TYPE_ROUTERSET, /**< A list of router names, addrs, and fps,
- * parsed into a routerset_t. */
- CONFIG_TYPE_OBSOLETE, /**< Obsolete (ignored) option. */
- } config_type_t;
- /** An abbreviation for a configuration option allowed on the command line. */
- typedef struct config_abbrev_t {
- const char *abbreviated;
- const char *full;
- int commandline_only;
- int warn;
- } config_abbrev_t;
- /* Handy macro for declaring "In the config file or on the command line,
- * you can abbreviate <b>tok</b>s as <b>tok</b>". */
- #define PLURAL(tok) { #tok, #tok "s", 0, 0 }
- /** A list of abbreviations and aliases to map command-line options, obsolete
- * option names, or alternative option names, to their current values. */
- static config_abbrev_t _option_abbrevs[] = {
- PLURAL(ExitNode),
- PLURAL(EntryNode),
- PLURAL(ExcludeNode),
- PLURAL(FirewallPort),
- PLURAL(LongLivedPort),
- PLURAL(HiddenServiceNode),
- PLURAL(HiddenServiceExcludeNode),
- PLURAL(NumCpu),
- PLURAL(RendNode),
- PLURAL(RendExcludeNode),
- PLURAL(StrictEntryNode),
- PLURAL(StrictExitNode),
- PLURAL(StrictNode),
- { "l", "Log", 1, 0},
- { "AllowUnverifiedNodes", "AllowInvalidNodes", 0, 0},
- { "AutomapHostSuffixes", "AutomapHostsSuffixes", 0, 0},
- { "AutomapHostOnResolve", "AutomapHostsOnResolve", 0, 0},
- { "BandwidthRateBytes", "BandwidthRate", 0, 0},
- { "BandwidthBurstBytes", "BandwidthBurst", 0, 0},
- { "DirFetchPostPeriod", "StatusFetchPeriod", 0, 0},
- { "MaxConn", "ConnLimit", 0, 1},
- { "ORBindAddress", "ORListenAddress", 0, 0},
- { "DirBindAddress", "DirListenAddress", 0, 0},
- { "SocksBindAddress", "SocksListenAddress", 0, 0},
- { "UseHelperNodes", "UseEntryGuards", 0, 0},
- { "NumHelperNodes", "NumEntryGuards", 0, 0},
- { "UseEntryNodes", "UseEntryGuards", 0, 0},
- { "NumEntryNodes", "NumEntryGuards", 0, 0},
- { "ResolvConf", "ServerDNSResolvConfFile", 0, 1},
- { "SearchDomains", "ServerDNSSearchDomains", 0, 1},
- { "ServerDNSAllowBrokenResolvConf", "ServerDNSAllowBrokenConfig", 0, 0},
- { "PreferTunnelledDirConns", "PreferTunneledDirConns", 0, 0},
- { "BridgeAuthoritativeDirectory", "BridgeAuthoritativeDir", 0, 0},
- { "HashedControlPassword", "__HashedControlSessionPassword", 1, 0},
- { "StrictEntryNodes", "StrictNodes", 0, 1},
- { "StrictExitNodes", "StrictNodes", 0, 1},
- { NULL, NULL, 0, 0},
- };
- /** A list of state-file "abbreviations," for compatibility. */
- static config_abbrev_t _state_abbrevs[] = {
- { "AccountingBytesReadInterval", "AccountingBytesReadInInterval", 0, 0 },
- { "HelperNode", "EntryGuard", 0, 0 },
- { "HelperNodeDownSince", "EntryGuardDownSince", 0, 0 },
- { "HelperNodeUnlistedSince", "EntryGuardUnlistedSince", 0, 0 },
- { "EntryNode", "EntryGuard", 0, 0 },
- { "EntryNodeDownSince", "EntryGuardDownSince", 0, 0 },
- { "EntryNodeUnlistedSince", "EntryGuardUnlistedSince", 0, 0 },
- { NULL, NULL, 0, 0},
- };
- #undef PLURAL
- /** A variable allowed in the configuration file or on the command line. */
- typedef struct config_var_t {
- const char *name; /**< The full keyword (case insensitive). */
- config_type_t type; /**< How to interpret the type and turn it into a
- * value. */
- off_t var_offset; /**< Offset of the corresponding member of or_options_t. */
- const char *initvalue; /**< String (or null) describing initial value. */
- } config_var_t;
- /** 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>"
- */
- #define VAR(name,conftype,member,initvalue) \
- { name, CONFIG_TYPE_ ## conftype, STRUCT_OFFSET(or_options_t, member), \
- initvalue }
- /** As VAR, but the option name and member name are the same. */
- #define V(member,conftype,initvalue) \
- VAR(#member, conftype, member, initvalue)
- /** An entry for config_vars: "The option <b>name</b> is obsolete." */
- #define OBSOLETE(name) { name, CONFIG_TYPE_OBSOLETE, 0, NULL }
- /** Array of configuration options. Until we disallow nonstandard
- * abbreviations, order is significant, since the first matching option will
- * be chosen first.
- */
- static config_var_t _option_vars[] = {
- OBSOLETE("AccountingMaxKB"),
- V(AccountingMax, MEMUNIT, "0 bytes"),
- V(AccountingStart, STRING, NULL),
- V(Address, STRING, NULL),
- V(AllowDotExit, BOOL, "0"),
- V(AllowInvalidNodes, CSV, "middle,rendezvous"),
- V(AllowNonRFC953Hostnames, BOOL, "0"),
- V(AllowSingleHopCircuits, BOOL, "0"),
- V(AllowSingleHopExits, BOOL, "0"),
- V(AlternateBridgeAuthority, LINELIST, NULL),
- V(AlternateDirAuthority, LINELIST, NULL),
- V(AlternateHSAuthority, LINELIST, NULL),
- V(AssumeReachable, BOOL, "0"),
- V(AuthDirBadDir, LINELIST, NULL),
- V(AuthDirBadExit, LINELIST, NULL),
- V(AuthDirInvalid, LINELIST, NULL),
- V(AuthDirReject, LINELIST, NULL),
- V(AuthDirRejectUnlisted, BOOL, "0"),
- V(AuthDirListBadDirs, BOOL, "0"),
- V(AuthDirListBadExits, BOOL, "0"),
- V(AuthDirMaxServersPerAddr, UINT, "2"),
- V(AuthDirMaxServersPerAuthAddr,UINT, "5"),
- VAR("AuthoritativeDirectory", BOOL, AuthoritativeDir, "0"),
- V(AutomapHostsOnResolve, BOOL, "0"),
- V(AutomapHostsSuffixes, CSV, ".onion,.exit"),
- V(AvoidDiskWrites, BOOL, "0"),
- V(BandwidthBurst, MEMUNIT, "10 MB"),
- V(BandwidthRate, MEMUNIT, "5 MB"),
- V(BridgeAuthoritativeDir, BOOL, "0"),
- VAR("Bridge", LINELIST, Bridges, NULL),
- V(BridgePassword, STRING, NULL),
- V(BridgeRecordUsageByCountry, BOOL, "1"),
- V(BridgeRelay, BOOL, "0"),
- V(CellStatistics, BOOL, "0"),
- V(CircuitBuildTimeout, INTERVAL, "0"),
- V(CircuitIdleTimeout, INTERVAL, "1 hour"),
- V(CircuitStreamTimeout, INTERVAL, "0"),
- V(CircuitPriorityHalflife, DOUBLE, "-100.0"), /*negative:'Use default'*/
- V(ClientDNSRejectInternalAddresses, BOOL,"1"),
- V(ClientOnly, BOOL, "0"),
- V(ConsensusParams, STRING, NULL),
- V(ConnLimit, UINT, "1000"),
- V(ConstrainedSockets, BOOL, "0"),
- V(ConstrainedSockSize, MEMUNIT, "8192"),
- V(ContactInfo, STRING, NULL),
- V(ControlListenAddress, LINELIST, NULL),
- V(ControlPort, UINT, "0"),
- V(ControlSocket, LINELIST, NULL),
- V(CookieAuthentication, BOOL, "0"),
- V(CookieAuthFileGroupReadable, BOOL, "0"),
- V(CookieAuthFile, STRING, NULL),
- V(DataDirectory, FILENAME, NULL),
- OBSOLETE("DebugLogFile"),
- V(DirAllowPrivateAddresses, BOOL, NULL),
- V(TestingAuthDirTimeToLearnReachability, INTERVAL, "30 minutes"),
- V(DirListenAddress, LINELIST, NULL),
- OBSOLETE("DirFetchPeriod"),
- V(DirPolicy, LINELIST, NULL),
- V(DirPort, UINT, "0"),
- V(DirPortFrontPage, FILENAME, NULL),
- OBSOLETE("DirPostPeriod"),
- OBSOLETE("DirRecordUsageByCountry"),
- OBSOLETE("DirRecordUsageGranularity"),
- OBSOLETE("DirRecordUsageRetainIPs"),
- OBSOLETE("DirRecordUsageSaveInterval"),
- V(DirReqStatistics, BOOL, "0"),
- VAR("DirServer", LINELIST, DirServers, NULL),
- V(DisableAllSwap, BOOL, "0"),
- V(DNSPort, UINT, "0"),
- V(DNSListenAddress, LINELIST, NULL),
- V(DownloadExtraInfo, BOOL, "0"),
- V(EnforceDistinctSubnets, BOOL, "1"),
- V(EntryNodes, ROUTERSET, NULL),
- V(EntryStatistics, BOOL, "0"),
- V(TestingEstimatedDescriptorPropagationTime, INTERVAL, "10 minutes"),
- V(ExcludeNodes, ROUTERSET, NULL),
- V(ExcludeExitNodes, ROUTERSET, NULL),
- V(ExcludeSingleHopRelays, BOOL, "1"),
- V(ExitNodes, ROUTERSET, NULL),
- V(ExitPolicy, LINELIST, NULL),
- V(ExitPolicyRejectPrivate, BOOL, "1"),
- V(ExitPortStatistics, BOOL, "0"),
- V(ExtraInfoStatistics, BOOL, "0"),
- V(FallbackNetworkstatusFile, FILENAME,
- SHARE_DATADIR PATH_SEPARATOR "tor" PATH_SEPARATOR "fallback-consensus"),
- V(FascistFirewall, BOOL, "0"),
- V(FirewallPorts, CSV, ""),
- V(FastFirstHopPK, BOOL, "1"),
- V(FetchDirInfoEarly, BOOL, "0"),
- V(FetchDirInfoExtraEarly, BOOL, "0"),
- V(FetchServerDescriptors, BOOL, "1"),
- V(FetchHidServDescriptors, BOOL, "1"),
- V(FetchUselessDescriptors, BOOL, "0"),
- #ifdef WIN32
- V(GeoIPFile, FILENAME, "<default>"),
- #else
- V(GeoIPFile, FILENAME,
- SHARE_DATADIR PATH_SEPARATOR "tor" PATH_SEPARATOR "geoip"),
- #endif
- OBSOLETE("Group"),
- V(HardwareAccel, BOOL, "0"),
- V(AccelName, STRING, NULL),
- V(AccelDir, FILENAME, NULL),
- V(HashedControlPassword, LINELIST, NULL),
- V(HidServDirectoryV2, BOOL, "1"),
- VAR("HiddenServiceDir", LINELIST_S, RendConfigLines, NULL),
- OBSOLETE("HiddenServiceExcludeNodes"),
- OBSOLETE("HiddenServiceNodes"),
- VAR("HiddenServiceOptions",LINELIST_V, RendConfigLines, NULL),
- VAR("HiddenServicePort", LINELIST_S, RendConfigLines, NULL),
- VAR("HiddenServiceVersion",LINELIST_S, RendConfigLines, NULL),
- VAR("HiddenServiceAuthorizeClient",LINELIST_S,RendConfigLines, NULL),
- V(HidServAuth, LINELIST, NULL),
- V(HSAuthoritativeDir, BOOL, "0"),
- OBSOLETE("HSAuthorityRecordStats"),
- V(HttpProxy, STRING, NULL),
- V(HttpProxyAuthenticator, STRING, NULL),
- V(HttpsProxy, STRING, NULL),
- V(HttpsProxyAuthenticator, STRING, NULL),
- V(Socks4Proxy, STRING, NULL),
- V(Socks5Proxy, STRING, NULL),
- V(Socks5ProxyUsername, STRING, NULL),
- V(Socks5ProxyPassword, STRING, NULL),
- OBSOLETE("IgnoreVersion"),
- V(KeepalivePeriod, INTERVAL, "5 minutes"),
- VAR("Log", LINELIST, Logs, NULL),
- OBSOLETE("LinkPadding"),
- OBSOLETE("LogLevel"),
- OBSOLETE("LogFile"),
- V(LongLivedPorts, CSV,
- "21,22,706,1863,5050,5190,5222,5223,6667,6697,8300"),
- VAR("MapAddress", LINELIST, AddressMap, NULL),
- V(MaxAdvertisedBandwidth, MEMUNIT, "1 GB"),
- V(MaxCircuitDirtiness, INTERVAL, "10 minutes"),
- V(MaxOnionsPending, UINT, "100"),
- OBSOLETE("MonthlyAccountingStart"),
- V(MyFamily, STRING, NULL),
- V(NewCircuitPeriod, INTERVAL, "30 seconds"),
- VAR("NamingAuthoritativeDirectory",BOOL, NamingAuthoritativeDir, "0"),
- V(NatdListenAddress, LINELIST, NULL),
- V(NatdPort, UINT, "0"),
- V(Nickname, STRING, NULL),
- V(NoPublish, BOOL, "0"),
- VAR("NodeFamily", LINELIST, NodeFamilies, NULL),
- V(NumCpus, UINT, "1"),
- V(NumEntryGuards, UINT, "3"),
- V(ORListenAddress, LINELIST, NULL),
- V(ORPort, UINT, "0"),
- V(OutboundBindAddress, STRING, NULL),
- OBSOLETE("PathlenCoinWeight"),
- V(PerConnBWBurst, MEMUNIT, "0"),
- V(PerConnBWRate, MEMUNIT, "0"),
- V(PidFile, STRING, NULL),
- V(TestingTorNetwork, BOOL, "0"),
- V(PreferTunneledDirConns, BOOL, "1"),
- V(ProtocolWarnings, BOOL, "0"),
- V(PublishServerDescriptor, CSV, "1"),
- 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),
- OBSOLETE("RedirectExit"),
- V(RejectPlaintextPorts, CSV, ""),
- V(RelayBandwidthBurst, MEMUNIT, "0"),
- V(RelayBandwidthRate, MEMUNIT, "0"),
- OBSOLETE("RendExcludeNodes"),
- OBSOLETE("RendNodes"),
- V(RendPostPeriod, INTERVAL, "1 hour"),
- V(RephistTrackTime, INTERVAL, "24 hours"),
- OBSOLETE("RouterFile"),
- V(RunAsDaemon, BOOL, "0"),
- V(RunTesting, BOOL, "0"),
- V(SafeLogging, STRING, "1"),
- V(SafeSocks, BOOL, "0"),
- V(ServerDNSAllowBrokenConfig, BOOL, "1"),
- V(ServerDNSAllowNonRFC953Hostnames, BOOL,"0"),
- V(ServerDNSDetectHijacking, BOOL, "1"),
- V(ServerDNSRandomizeCase, BOOL, "1"),
- V(ServerDNSResolvConfFile, STRING, NULL),
- V(ServerDNSSearchDomains, BOOL, "0"),
- V(ServerDNSTestAddresses, CSV,
- "www.google.com,www.mit.edu,www.yahoo.com,www.slashdot.org"),
- V(ShutdownWaitLength, INTERVAL, "30 seconds"),
- V(SocksListenAddress, LINELIST, NULL),
- V(SocksPolicy, LINELIST, NULL),
- V(SocksPort, UINT, "9050"),
- V(SocksTimeout, INTERVAL, "2 minutes"),
- OBSOLETE("StatusFetchPeriod"),
- V(StrictNodes, BOOL, "0"),
- OBSOLETE("SysLog"),
- V(TestSocks, BOOL, "0"),
- OBSOLETE("TestVia"),
- V(TrackHostExits, CSV, NULL),
- V(TrackHostExitsExpire, INTERVAL, "30 minutes"),
- OBSOLETE("TrafficShaping"),
- V(TransListenAddress, LINELIST, NULL),
- V(TransPort, UINT, "0"),
- V(TunnelDirConns, BOOL, "1"),
- V(UpdateBridgesFromAuthority, BOOL, "0"),
- V(UseBridges, BOOL, "0"),
- V(UseEntryGuards, BOOL, "1"),
- V(User, STRING, NULL),
- VAR("V1AuthoritativeDirectory",BOOL, V1AuthoritativeDir, "0"),
- VAR("V2AuthoritativeDirectory",BOOL, V2AuthoritativeDir, "0"),
- VAR("V3AuthoritativeDirectory",BOOL, V3AuthoritativeDir, "0"),
- V(TestingV3AuthInitialVotingInterval, INTERVAL, "30 minutes"),
- V(TestingV3AuthInitialVoteDelay, INTERVAL, "5 minutes"),
- V(TestingV3AuthInitialDistDelay, INTERVAL, "5 minutes"),
- V(V3AuthVotingInterval, INTERVAL, "1 hour"),
- V(V3AuthVoteDelay, INTERVAL, "5 minutes"),
- V(V3AuthDistDelay, INTERVAL, "5 minutes"),
- V(V3AuthNIntervalsValid, UINT, "3"),
- V(V3AuthUseLegacyKey, BOOL, "0"),
- V(V3BandwidthsFile, FILENAME, NULL),
- VAR("VersioningAuthoritativeDirectory",BOOL,VersioningAuthoritativeDir, "0"),
- V(VirtualAddrNetwork, STRING, "127.192.0.0/10"),
- V(WarnPlaintextPorts, CSV, "23,109,110,143"),
- VAR("__ReloadTorrcOnSIGHUP", BOOL, ReloadTorrcOnSIGHUP, "1"),
- VAR("__AllDirActionsPrivate", BOOL, AllDirActionsPrivate, "0"),
- VAR("__DisablePredictedCircuits",BOOL,DisablePredictedCircuits, "0"),
- VAR("__LeaveStreamsUnattached",BOOL, LeaveStreamsUnattached, "0"),
- VAR("__HashedControlSessionPassword", LINELIST, HashedControlSessionPassword,
- NULL),
- V(MinUptimeHidServDirectoryV2, INTERVAL, "24 hours"),
- { NULL, CONFIG_TYPE_OBSOLETE, 0, NULL }
- };
- /** Override default values with these if the user sets the TestingTorNetwork
- * option. */
- static config_var_t testing_tor_network_defaults[] = {
- V(ServerDNSAllowBrokenConfig, BOOL, "1"),
- V(DirAllowPrivateAddresses, BOOL, "1"),
- V(EnforceDistinctSubnets, BOOL, "0"),
- V(AssumeReachable, BOOL, "1"),
- V(AuthDirMaxServersPerAddr, UINT, "0"),
- V(AuthDirMaxServersPerAuthAddr,UINT, "0"),
- V(ClientDNSRejectInternalAddresses, BOOL,"0"),
- V(ExitPolicyRejectPrivate, BOOL, "0"),
- V(V3AuthVotingInterval, INTERVAL, "5 minutes"),
- V(V3AuthVoteDelay, INTERVAL, "20 seconds"),
- V(V3AuthDistDelay, INTERVAL, "20 seconds"),
- 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"),
- { NULL, CONFIG_TYPE_OBSOLETE, 0, NULL }
- };
- #undef VAR
- #define VAR(name,conftype,member,initvalue) \
- { name, CONFIG_TYPE_ ## conftype, STRUCT_OFFSET(or_state_t, member), \
- initvalue }
- /** Array of "state" variables saved to the ~/.tor/state file. */
- static config_var_t _state_vars[] = {
- V(AccountingBytesReadInInterval, MEMUNIT, NULL),
- V(AccountingBytesWrittenInInterval, MEMUNIT, NULL),
- V(AccountingExpectedUsage, MEMUNIT, NULL),
- V(AccountingIntervalStart, ISOTIME, NULL),
- V(AccountingSecondsActive, INTERVAL, NULL),
- VAR("EntryGuard", LINELIST_S, EntryGuards, NULL),
- VAR("EntryGuardDownSince", LINELIST_S, EntryGuards, NULL),
- VAR("EntryGuardUnlistedSince", LINELIST_S, EntryGuards, NULL),
- VAR("EntryGuardAddedBy", LINELIST_S, EntryGuards, NULL),
- V(EntryGuards, LINELIST_V, NULL),
- V(BWHistoryReadEnds, ISOTIME, NULL),
- V(BWHistoryReadInterval, UINT, "900"),
- V(BWHistoryReadValues, CSV, ""),
- V(BWHistoryWriteEnds, ISOTIME, NULL),
- V(BWHistoryWriteInterval, UINT, "900"),
- V(BWHistoryWriteValues, CSV, ""),
- V(TorVersion, STRING, NULL),
- V(LastRotatedOnionKey, ISOTIME, NULL),
- V(LastWritten, ISOTIME, NULL),
- V(TotalBuildTimes, UINT, NULL),
- VAR("CircuitBuildTimeBin", LINELIST_S, BuildtimeHistogram, NULL),
- VAR("BuildtimeHistogram", LINELIST_V, BuildtimeHistogram, NULL),
- { NULL, CONFIG_TYPE_OBSOLETE, 0, NULL }
- };
- #undef VAR
- #undef V
- #undef OBSOLETE
- /** Represents an English description of a configuration variable; used when
- * generating configuration file comments. */
- typedef struct config_var_description_t {
- const char *name;
- const char *description;
- } config_var_description_t;
- /** Type of a callback to validate whether a given configuration is
- * well-formed and consistent. See options_trial_assign() for documentation
- * of arguments. */
- typedef int (*validate_fn_t)(void*,void*,int,char**);
- /** Information on the keys, value types, key-to-struct-member mappings,
- * variable descriptions, validation functions, and abbreviations for a
- * configuration or storage format. */
- typedef struct {
- size_t size; /**< Size of the struct that everything gets parsed into. */
- uint32_t magic; /**< Required 'magic value' to make sure we have a struct
- * of the right type. */
- off_t magic_offset; /**< Offset of the magic value within the struct. */
- config_abbrev_t *abbrevs; /**< List of abbreviations that we expand when
- * parsing this format. */
- config_var_t *vars; /**< List of variables we recognize, their default
- * values, and where we stick them in the structure. */
- validate_fn_t validate_fn; /**< Function to validate config. */
- /** If present, extra is a LINELIST variable for unrecognized
- * lines. Otherwise, unrecognized lines are an error. */
- config_var_t *extra;
- } config_format_t;
- /** Macro: assert that <b>cfg</b> has the right magic field for format
- * <b>fmt</b>. */
- #define CHECK(fmt, cfg) STMT_BEGIN \
- tor_assert(fmt && cfg); \
- tor_assert((fmt)->magic == \
- *(uint32_t*)STRUCT_VAR_P(cfg,fmt->magic_offset)); \
- STMT_END
- #ifdef MS_WINDOWS
- static char *get_windows_conf_root(void);
- #endif
- static void config_line_append(config_line_t **lst,
- const char *key, const char *val);
- static void option_clear(config_format_t *fmt, or_options_t *options,
- config_var_t *var);
- static void option_reset(config_format_t *fmt, or_options_t *options,
- config_var_t *var, int use_defaults);
- static void config_free(config_format_t *fmt, void *options);
- static int config_lines_eq(config_line_t *a, config_line_t *b);
- static int option_is_same(config_format_t *fmt,
- or_options_t *o1, or_options_t *o2,
- const char *name);
- static or_options_t *options_dup(config_format_t *fmt, or_options_t *old);
- static int options_validate(or_options_t *old_options, or_options_t *options,
- int from_setconf, char **msg);
- static int options_act_reversible(or_options_t *old_options, char **msg);
- static int options_act(or_options_t *old_options);
- static int options_transition_allowed(or_options_t *old, or_options_t *new,
- char **msg);
- static int options_transition_affects_workers(or_options_t *old_options,
- or_options_t *new_options);
- static int options_transition_affects_descriptor(or_options_t *old_options,
- or_options_t *new_options);
- static int check_nickname_list(const char *lst, const char *name, char **msg);
- static void config_register_addressmaps(or_options_t *options);
- static int parse_bridge_line(const char *line, int validate_only);
- static int parse_dir_server_line(const char *line,
- authority_type_t required_type,
- int validate_only);
- static int validate_data_directory(or_options_t *options);
- static int write_configuration_file(const char *fname, or_options_t *options);
- static config_line_t *get_assigned_option(config_format_t *fmt,
- void *options, const char *key,
- int escape_val);
- static void config_init(config_format_t *fmt, void *options);
- static int or_state_validate(or_state_t *old_options, or_state_t *options,
- int from_setconf, char **msg);
- static int or_state_load(void);
- static int options_init_logs(or_options_t *options, int validate_only);
- static int is_listening_on_low_port(uint16_t port_option,
- const config_line_t *listen_options);
- static uint64_t config_parse_memunit(const char *s, int *ok);
- static int config_parse_interval(const char *s, int *ok);
- static void init_libevent(void);
- static int opt_streq(const char *s1, const char *s2);
- /** Magic value for or_options_t. */
- #define OR_OPTIONS_MAGIC 9090909
- /** Configuration format for or_options_t. */
- static config_format_t options_format = {
- sizeof(or_options_t),
- OR_OPTIONS_MAGIC,
- STRUCT_OFFSET(or_options_t, _magic),
- _option_abbrevs,
- _option_vars,
- (validate_fn_t)options_validate,
- NULL
- };
- /** Magic value for or_state_t. */
- #define OR_STATE_MAGIC 0x57A73f57
- /** "Extra" variable in the state that receives lines we can't parse. This
- * lets us preserve options from versions of Tor newer than us. */
- static config_var_t state_extra_var = {
- "__extra", CONFIG_TYPE_LINELIST, STRUCT_OFFSET(or_state_t, ExtraLines), NULL
- };
- /** Configuration format for or_state_t. */
- static config_format_t state_format = {
- sizeof(or_state_t),
- OR_STATE_MAGIC,
- STRUCT_OFFSET(or_state_t, _magic),
- _state_abbrevs,
- _state_vars,
- (validate_fn_t)or_state_validate,
- &state_extra_var,
- };
- /*
- * Functions to read and write the global options pointer.
- */
- /** Command-line and config-file options. */
- static or_options_t *global_options = NULL;
- /** Name of most recently read torrc file. */
- static char *torrc_fname = NULL;
- /** Persistent serialized state. */
- static or_state_t *global_state = NULL;
- /** Configuration Options set by command line. */
- static config_line_t *global_cmdline_options = NULL;
- /** Contents of most recently read DirPortFrontPage file. */
- static char *global_dirfrontpagecontents = NULL;
- /** Return the contents of our frontpage string, or NULL if not configured. */
- const char *
- get_dirportfrontpage(void)
- {
- return global_dirfrontpagecontents;
- }
- /** Allocate an empty configuration object of a given format type. */
- static void *
- config_alloc(config_format_t *fmt)
- {
- void *opts = tor_malloc_zero(fmt->size);
- *(uint32_t*)STRUCT_VAR_P(opts, fmt->magic_offset) = fmt->magic;
- CHECK(fmt, opts);
- return opts;
- }
- /** Return the currently configured options. */
- or_options_t *
- get_options(void)
- {
- tor_assert(global_options);
- return global_options;
- }
- /** 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
- * as necessary. Returns 0 on success, -1 on failure.
- */
- int
- set_options(or_options_t *new_val, char **msg)
- {
- or_options_t *old_options = global_options;
- global_options = new_val;
- /* Note that we pass the *old* options below, for comparison. It
- * pulls the new options directly out of global_options. */
- if (options_act_reversible(old_options, msg)<0) {
- tor_assert(*msg);
- global_options = old_options;
- return -1;
- }
- if (options_act(old_options) < 0) { /* acting on the options failed. die. */
- log_err(LD_BUG,
- "Acting on config options left us in a broken state. Dying.");
- exit(1);
- }
- config_free(&options_format, old_options);
- return 0;
- }
- extern const char tor_git_revision[]; /* from tor_main.c */
- /** The version of this Tor process, as parsed. */
- static char *_version = NULL;
- /** Return the current Tor version. */
- const char *
- get_version(void)
- {
- if (_version == NULL) {
- if (strlen(tor_git_revision)) {
- size_t len = strlen(VERSION)+strlen(tor_git_revision)+16;
- _version = tor_malloc(len);
- tor_snprintf(_version, len, "%s (git-%s)", VERSION, tor_git_revision);
- } else {
- _version = tor_strdup(VERSION);
- }
- }
- return _version;
- }
- /** Release additional memory allocated in options
- */
- static void
- or_options_free(or_options_t *options)
- {
- if (!options)
- return;
- routerset_free(options->_ExcludeExitNodesUnion);
- config_free(&options_format, options);
- }
- /** Release all memory and resources held by global configuration structures.
- */
- void
- config_free_all(void)
- {
- or_options_free(global_options);
- global_options = NULL;
- config_free(&state_format, global_state);
- global_state = NULL;
- config_free_lines(global_cmdline_options);
- global_cmdline_options = NULL;
- tor_free(torrc_fname);
- tor_free(_version);
- tor_free(global_dirfrontpagecontents);
- }
- /** 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.)
- */
- const char *
- safe_str_client(const char *address)
- {
- tor_assert(address);
- if (get_options()->_SafeLogging == SAFELOG_SCRUB_ALL)
- return "[scrubbed]";
- else
- return address;
- }
- /** Make <b>address</b> -- a piece of information of unspecified sensitivity
- * -- safe to log according to the settings in options->SafeLogging, and
- * return it.
- *
- * (We return "[scrubbed]" if SafeLogging is anything besides "0", and address
- * otherwise.)
- */
- const char *
- safe_str(const char *address)
- {
- tor_assert(address);
- if (get_options()->_SafeLogging != SAFELOG_SCRUB_NONE)
- return "[scrubbed]";
- else
- return address;
- }
- /** Equivalent to escaped(safe_str_client(address)). See reentrancy note on
- * escaped(): don't use this outside the main thread, or twice in the same
- * log statement. */
- const char *
- escaped_safe_str_client(const char *address)
- {
- if (get_options()->_SafeLogging == SAFELOG_SCRUB_ALL)
- return "[scrubbed]";
- else
- return escaped(address);
- }
- /** Equivalent to escaped(safe_str(address)). See reentrancy note on
- * escaped(): don't use this outside the main thread, or twice in the same
- * log statement. */
- const char *
- escaped_safe_str(const char *address)
- {
- if (get_options()->_SafeLogging != SAFELOG_SCRUB_NONE)
- return "[scrubbed]";
- else
- return escaped(address);
- }
- /** Add the default directory authorities directly into the trusted dir list,
- * but only add them insofar as they share bits with <b>type</b>. */
- static void
- add_default_trusted_dir_authorities(authority_type_t type)
- {
- int i;
- const char *dirservers[] = {
- "moria1 orport=9101 no-v2 "
- "v3ident=D586D18309DED4CD6D57C18FDB97EFA96D330566 "
- "128.31.0.39:9131 9695 DFC3 5FFE B861 329B 9F1A B04C 4639 7020 CE31",
- "moria2 v1 orport=9002 128.31.0.34:9032 "
- "719B E45D E224 B607 C537 07D0 E214 3E2D 423E 74CF",
- "tor26 v1 orport=443 v3ident=14C131DFC5C6F93646BE72FA1401C02A8DF2E8B4 "
- "86.59.21.38:80 847B 1F85 0344 D787 6491 A548 92F9 0493 4E4E B85D",
- "dizum orport=443 v3ident=E8A9C45EDE6D711294FADF8E7951F4DE6CA56B58 "
- "194.109.206.212:80 7EA6 EAD6 FD83 083C 538F 4403 8BBF A077 587D D755",
- "Tonga orport=443 bridge no-v2 82.94.251.203:80 "
- "4A0C CD2D DC79 9508 3D73 F5D6 6710 0C8A 5831 F16D",
- "ides orport=9090 no-v2 v3ident=27B6B5996C426270A5C95488AA5BCEB6BCC86956 "
- "216.224.124.114:9030 F397 038A DC51 3361 35E7 B80B D99C A384 4360 292B",
- "gabelmoo orport=8080 no-v2 "
- "v3ident=ED03BB616EB2F60BEC80151114BB25CEF515B226 "
- "80.190.246.100:8180 F204 4413 DAC2 E02E 3D6B CF47 35A1 9BCA 1DE9 7281",
- "dannenberg orport=443 no-v2 "
- "v3ident=585769C78764D58426B8B52B6651A5A71137189A "
- "213.73.91.31:80 7BE6 83E6 5D48 1413 21C5 ED92 F075 C553 64AC 7123",
- "urras orport=80 no-v2 v3ident=80550987E1D626E3EBA5E5E75A458DE0626D088C "
- "208.83.223.34:443 0AD3 FA88 4D18 F89E EA2D 89C0 1937 9E0E 7FD9 4417",
- NULL
- };
- for (i=0; dirservers[i]; i++) {
- if (parse_dir_server_line(dirservers[i], type, 0)<0) {
- log_err(LD_BUG, "Couldn't parse internal dirserver line %s",
- dirservers[i]);
- }
- }
- }
- /** Look at all the config options for using alternate directory
- * authorities, and make sure none of them are broken. Also, warn the
- * user if we changed any dangerous ones.
- */
- static int
- validate_dir_authorities(or_options_t *options, or_options_t *old_options)
- {
- config_line_t *cl;
- if (options->DirServers &&
- (options->AlternateDirAuthority || options->AlternateBridgeAuthority ||
- options->AlternateHSAuthority)) {
- log_warn(LD_CONFIG,
- "You cannot set both DirServers and Alternate*Authority.");
- return -1;
- }
- /* do we want to complain to the user about being partitionable? */
- if ((options->DirServers &&
- (!old_options ||
- !config_lines_eq(options->DirServers, old_options->DirServers))) ||
- (options->AlternateDirAuthority &&
- (!old_options ||
- !config_lines_eq(options->AlternateDirAuthority,
- old_options->AlternateDirAuthority)))) {
- log_warn(LD_CONFIG,
- "You have used DirServer or AlternateDirAuthority to "
- "specify alternate directory authorities in "
- "your configuration. This is potentially dangerous: it can "
- "make you look different from all other Tor users, and hurt "
- "your anonymity. Even if you've specified the same "
- "authorities as Tor uses by default, the defaults could "
- "change in the future. Be sure you know what you're doing.");
- }
- /* Now go through the four ways you can configure an alternate
- * set of directory authorities, and make sure none are broken. */
- for (cl = options->DirServers; cl; cl = cl->next)
- if (parse_dir_server_line(cl->value, NO_AUTHORITY, 1)<0)
- return -1;
- for (cl = options->AlternateBridgeAuthority; cl; cl = cl->next)
- if (parse_dir_server_line(cl->value, NO_AUTHORITY, 1)<0)
- return -1;
- for (cl = options->AlternateDirAuthority; cl; cl = cl->next)
- if (parse_dir_server_line(cl->value, NO_AUTHORITY, 1)<0)
- return -1;
- for (cl = options->AlternateHSAuthority; cl; cl = cl->next)
- if (parse_dir_server_line(cl->value, NO_AUTHORITY, 1)<0)
- return -1;
- return 0;
- }
- /** Look at all the config options and assign new dir authorities
- * as appropriate.
- */
- static int
- consider_adding_dir_authorities(or_options_t *options,
- or_options_t *old_options)
- {
- config_line_t *cl;
- int need_to_update =
- !smartlist_len(router_get_trusted_dir_servers()) || !old_options ||
- !config_lines_eq(options->DirServers, old_options->DirServers) ||
- !config_lines_eq(options->AlternateBridgeAuthority,
- old_options->AlternateBridgeAuthority) ||
- !config_lines_eq(options->AlternateDirAuthority,
- old_options->AlternateDirAuthority) ||
- !config_lines_eq(options->AlternateHSAuthority,
- old_options->AlternateHSAuthority);
- if (!need_to_update)
- return 0; /* all done */
- /* Start from a clean slate. */
- clear_trusted_dir_servers();
- if (!options->DirServers) {
- /* then we may want some of the defaults */
- authority_type_t type = NO_AUTHORITY;
- if (!options->AlternateBridgeAuthority)
- type |= BRIDGE_AUTHORITY;
- if (!options->AlternateDirAuthority)
- type |= V1_AUTHORITY | V2_AUTHORITY | V3_AUTHORITY;
- if (!options->AlternateHSAuthority)
- type |= HIDSERV_AUTHORITY;
- add_default_trusted_dir_authorities(type);
- }
- for (cl = options->DirServers; cl; cl = cl->next)
- if (parse_dir_server_line(cl->value, NO_AUTHORITY, 0)<0)
- return -1;
- for (cl = options->AlternateBridgeAuthority; cl; cl = cl->next)
- if (parse_dir_server_line(cl->value, NO_AUTHORITY, 0)<0)
- return -1;
- for (cl = options->AlternateDirAuthority; cl; cl = cl->next)
- if (parse_dir_server_line(cl->value, NO_AUTHORITY, 0)<0)
- return -1;
- for (cl = options->AlternateHSAuthority; cl; cl = cl->next)
- if (parse_dir_server_line(cl->value, NO_AUTHORITY, 0)<0)
- return -1;
- return 0;
- }
- /** Fetch the active option list, and take actions based on it. All of the
- * things we do should survive being done repeatedly. If present,
- * <b>old_options</b> contains the previous value of the options.
- *
- * Return 0 if all goes well, return -1 if things went badly.
- */
- static int
- options_act_reversible(or_options_t *old_options, char **msg)
- {
- smartlist_t *new_listeners = smartlist_create();
- smartlist_t *replaced_listeners = smartlist_create();
- static int libevent_initialized = 0;
- or_options_t *options = get_options();
- int running_tor = options->command == CMD_RUN_TOR;
- int set_conn_limit = 0;
- int r = -1;
- int logs_marked = 0;
- /* Daemonize _first_, since we only want to open most of this stuff in
- * the subprocess. Libevent bases can't be reliably inherited across
- * processes. */
- if (running_tor && options->RunAsDaemon) {
- /* No need to roll back, since you can't change the value. */
- start_daemon();
- }
- #ifndef HAVE_SYS_UN_H
- if (options->ControlSocket) {
- *msg = tor_strdup("Unix domain sockets (ControlSocket) not supported"
- " on this OS/with this build.");
- goto rollback;
- }
- #endif
- if (running_tor) {
- /* We need to set the connection limit before we can open the listeners. */
- if (set_max_file_descriptors((unsigned)options->ConnLimit,
- &options->_ConnLimit) < 0) {
- *msg = tor_strdup("Problem with ConnLimit value. See logs for details.");
- goto rollback;
- }
- set_conn_limit = 1;
- /* Set up libevent. (We need to do this before we can register the
- * listeners as listeners.) */
- if (running_tor && !libevent_initialized) {
- init_libevent();
- libevent_initialized = 1;
- }
- /* Launch the listeners. (We do this before we setuid, so we can bind to
- * ports under 1024.) */
- if (retry_all_listeners(replaced_listeners, new_listeners) < 0) {
- *msg = tor_strdup("Failed to bind one of the listener ports.");
- goto rollback;
- }
- }
- #if defined(HAVE_NET_IF_H) && defined(HAVE_NET_PFVAR_H)
- /* Open /dev/pf before dropping privileges. */
- if (options->TransPort) {
- if (get_pf_socket() < 0) {
- *msg = tor_strdup("Unable to open /dev/pf for transparent proxy.");
- goto rollback;
- }
- }
- #endif
- /* Attempt to lock all current and future memory with mlockall() only once */
- if (options->DisableAllSwap) {
- if (tor_mlockall() == -1) {
- *msg = tor_strdup("DisableAllSwap failure. Do you have proper "
- "permissions?");
- goto done;
- }
- }
- /* Setuid/setgid as appropriate */
- if (options->User) {
- if (switch_id(options->User) != 0) {
- /* No need to roll back, since you can't change the value. */
- *msg = tor_strdup("Problem with User value. See logs for details.");
- goto done;
- }
- }
- /* Ensure data directory is private; create if possible. */
- if (check_private_dir(options->DataDirectory,
- running_tor ? CPD_CREATE : CPD_CHECK)<0) {
- char buf[1024];
- int tmp = tor_snprintf(buf, sizeof(buf),
- "Couldn't access/create private data directory \"%s\"",
- options->DataDirectory);
- *msg = tor_strdup(tmp >= 0 ? buf : "internal error");
- goto done;
- /* No need to roll back, since you can't change the value. */
- }
- if (directory_caches_v2_dir_info(options)) {
- size_t len = strlen(options->DataDirectory)+32;
- char *fn = tor_malloc(len);
- tor_snprintf(fn, len, "%s"PATH_SEPARATOR"cached-status",
- options->DataDirectory);
- if (check_private_dir(fn, running_tor ? CPD_CREATE : CPD_CHECK) < 0) {
- char buf[1024];
- int tmp = tor_snprintf(buf, sizeof(buf),
- "Couldn't access/create private data directory \"%s\"", fn);
- *msg = tor_strdup(tmp >= 0 ? buf : "internal error");
- tor_free(fn);
- goto done;
- }
- tor_free(fn);
- }
- /* Bail out at this point if we're not going to be a client or server:
- * we don't run Tor itself. */
- if (!running_tor)
- goto commit;
- mark_logs_temp(); /* Close current logs once new logs are open. */
- logs_marked = 1;
- if (options_init_logs(options, 0)<0) { /* Configure the log(s) */
- *msg = tor_strdup("Failed to init Log options. See logs for details.");
- goto rollback;
- }
- commit:
- r = 0;
- if (logs_marked) {
- log_severity_list_t *severity =
- tor_malloc_zero(sizeof(log_severity_list_t));
- close_temp_logs();
- add_callback_log(severity, control_event_logmsg);
- control_adjust_event_log_severity();
- tor_free(severity);
- }
- SMARTLIST_FOREACH(replaced_listeners, connection_t *, conn,
- {
- log_notice(LD_NET, "Closing old %s on %s:%d",
- conn_type_to_string(conn->type), conn->address, conn->port);
- connection_close_immediate(conn);
- connection_mark_for_close(conn);
- });
- goto done;
- rollback:
- r = -1;
- tor_assert(*msg);
- if (logs_marked) {
- rollback_log_changes();
- control_adjust_event_log_severity();
- }
- if (set_conn_limit && old_options)
- set_max_file_descriptors((unsigned)old_options->ConnLimit,
- &options->_ConnLimit);
- SMARTLIST_FOREACH(new_listeners, connection_t *, conn,
- {
- log_notice(LD_NET, "Closing partially-constructed listener %s on %s:%d",
- conn_type_to_string(conn->type), conn->address, conn->port);
- connection_close_immediate(conn);
- connection_mark_for_close(conn);
- });
- done:
- smartlist_free(new_listeners);
- smartlist_free(replaced_listeners);
- return r;
- }
- /** If we need to have a GEOIP ip-to-country map to run with our configured
- * options, return 1 and set *<b>reason_out</b> to a description of why. */
- int
- options_need_geoip_info(or_options_t *options, const char **reason_out)
- {
- int bridge_usage =
- options->BridgeRelay && options->BridgeRecordUsageByCountry;
- int routerset_usage =
- routerset_needs_geoip(options->EntryNodes) ||
- routerset_needs_geoip(options->ExitNodes) ||
- routerset_needs_geoip(options->ExcludeExitNodes) ||
- routerset_needs_geoip(options->ExcludeNodes);
- if (routerset_usage && reason_out) {
- *reason_out = "We've been configured to use (or avoid) nodes in certain "
- "countries, and we need GEOIP information to figure out which ones they "
- "are.";
- } else if (bridge_usage && reason_out) {
- *reason_out = "We've been configured to see which countries can access "
- "us as a bridge, and we need GEOIP information to tell which countries "
- "clients are in.";
- }
- return bridge_usage || routerset_usage;
- }
- /** Return the bandwidthrate that we are going to report to the authorities
- * based on the config options. */
- uint32_t
- get_effective_bwrate(or_options_t *options)
- {
- uint64_t bw = options->BandwidthRate;
- if (bw > options->MaxAdvertisedBandwidth)
- bw = options->MaxAdvertisedBandwidth;
- if (options->RelayBandwidthRate > 0 && bw > options->RelayBandwidthRate)
- bw = options->RelayBandwidthRate;
- /* ensure_bandwidth_cap() makes sure that this cast can't overflow. */
- return (uint32_t)bw;
- }
- /** Return the bandwidthburst that we are going to report to the authorities
- * based on the config options. */
- uint32_t
- get_effective_bwburst(or_options_t *options)
- {
- uint64_t bw = options->BandwidthBurst;
- if (options->RelayBandwidthBurst > 0 && bw > options->RelayBandwidthBurst)
- bw = options->RelayBandwidthBurst;
- /* ensure_bandwidth_cap() makes sure that this cast can't overflow. */
- return (uint32_t)bw;
- }
- /** Fetch the active option list, and take actions based on it. All of the
- * things we do should survive being done repeatedly. If present,
- * <b>old_options</b> contains the previous value of the options.
- *
- * Return 0 if all goes well, return -1 if it's time to die.
- *
- * Note: We haven't moved all the "act on new configuration" logic
- * here yet. Some is still in do_hup() and other places.
- */
- static int
- options_act(or_options_t *old_options)
- {
- config_line_t *cl;
- or_options_t *options = get_options();
- int running_tor = options->command == CMD_RUN_TOR;
- char *msg;
- if (running_tor && !have_lockfile()) {
- if (try_locking(options, 1) < 0)
- return -1;
- }
- if (consider_adding_dir_authorities(options, old_options) < 0)
- return -1;
- if (options->Bridges) {
- clear_bridge_list();
- for (cl = options->Bridges; cl; cl = cl->next) {
- if (parse_bridge_line(cl->value, 0)<0) {
- log_warn(LD_BUG,
- "Previously validated Bridge line could not be added!");
- return -1;
- }
- }
- }
- if (running_tor && rend_config_services(options, 0)<0) {
- log_warn(LD_BUG,
- "Previously validated hidden services line could not be added!");
- return -1;
- }
- if (running_tor && rend_parse_service_authorization(options, 0) < 0) {
- log_warn(LD_BUG, "Previously validated client authorization for "
- "hidden services could not be added!");
- return -1;
- }
- /* Load state */
- if (! global_state && running_tor) {
- if (or_state_load())
- return -1;
- rep_hist_load_mtbf_data(time(NULL));
- }
- /* Bail out at this point if we're not going to be a client or server:
- * we want to not fork, and to log stuff to stderr. */
- if (!running_tor)
- return 0;
- /* Finish backgrounding the process */
- if (options->RunAsDaemon) {
- /* We may be calling this for the n'th time (on SIGHUP), but it's safe. */
- finish_daemon(options->DataDirectory);
- }
- /* Write our PID to the PID file. If we do not have write permissions we
- * will log a warning */
- if (options->PidFile)
- write_pidfile(options->PidFile);
- /* Register addressmap directives */
- config_register_addressmaps(options);
- parse_virtual_addr_network(options->VirtualAddrNetwork, 0, &msg);
- /* Update address policies. */
- if (policies_parse_from_options(options) < 0) {
- /* This should be impossible, but let's be sure. */
- log_warn(LD_BUG,"Error parsing already-validated policy options.");
- return -1;
- }
- if (init_cookie_authentication(options->CookieAuthentication) < 0) {
- log_warn(LD_CONFIG,"Error creating cookie authentication file.");
- return -1;
- }
- /* reload keys as needed for rendezvous services. */
- if (rend_service_load_keys()<0) {
- log_warn(LD_GENERAL,"Error loading rendezvous service keys");
- return -1;
- }
- /* Set up accounting */
- if (accounting_parse_options(options, 0)<0) {
- log_warn(LD_CONFIG,"Error in accounting options");
- return -1;
- }
- if (accounting_is_enabled(options))
- configure_accounting(time(NULL));
- /* Change the cell EWMA settings */
- cell_ewma_set_scale_factor(options, networkstatus_get_latest_consensus());
- /* Check for transitions that need action. */
- if (old_options) {
- if ((options->UseEntryGuards && !old_options->UseEntryGuards) ||
- (options->ExcludeNodes &&
- !routerset_equal(old_options->ExcludeNodes,options->ExcludeNodes)) ||
- (options->ExcludeExitNodes &&
- !routerset_equal(old_options->ExcludeExitNodes,
- options->ExcludeExitNodes)) ||
- (options->EntryNodes &&
- !routerset_equal(old_options->EntryNodes, options->EntryNodes)) ||
- (options->ExitNodes &&
- !routerset_equal(old_options->ExitNodes, options->ExitNodes)) ||
- options->StrictNodes != old_options->StrictNodes) {
- log_info(LD_CIRC,
- "Changed to using entry guards, or changed preferred or "
- "excluded node lists. Abandoning previous circuits.");
- circuit_mark_all_unused_circs();
- circuit_expire_all_dirty_circs();
- }
- if (! bool_eq(options->BridgeRelay, old_options->BridgeRelay)) {
- log_info(LD_GENERAL, "Bridge status changed. Forgetting GeoIP stats.");
- geoip_remove_old_clients(time(NULL)+(2*60*60));
- }
- if (options_transition_affects_workers(old_options, options)) {
- log_info(LD_GENERAL,
- "Worker-related options changed. Rotating workers.");
- if (server_mode(options) && !server_mode(old_options)) {
- if (init_keys() < 0) {
- log_warn(LD_BUG,"Error initializing keys; exiting");
- return -1;
- }
- ip_address_changed(0);
- if (has_completed_circuit || !any_predicted_circuits(time(NULL)))
- inform_testing_reachability();
- }
- cpuworkers_rotate();
- if (dns_reset())
- return -1;
- } else {
- if (dns_reset())
- return -1;
- }
- if (options->V3AuthoritativeDir && !old_options->V3AuthoritativeDir)
- init_keys();
- }
- /* Maybe load geoip file */
- if (options->GeoIPFile &&
- ((!old_options || !opt_streq(old_options->GeoIPFile, options->GeoIPFile))
- || !geoip_is_loaded())) {
- /* XXXX Don't use this "<default>" junk; make our filename options
- * understand prefixes somehow. -NM */
- /* XXXX021 Reload GeoIPFile on SIGHUP. -NM */
- char *actual_fname = tor_strdup(options->GeoIPFile);
- #ifdef WIN32
- if (!strcmp(actual_fname, "<default>")) {
- const char *conf_root = get_windows_conf_root();
- size_t len = strlen(conf_root)+16;
- tor_free(actual_fname);
- actual_fname = tor_malloc(len+1);
- tor_snprintf(actual_fname, len, "%s\\geoip", conf_root);
- }
- #endif
- geoip_load_file(actual_fname, options);
- tor_free(actual_fname);
- }
- if (options->DirReqStatistics && !geoip_is_loaded()) {
- /* Check if GeoIP database could be loaded. */
- log_warn(LD_CONFIG, "Configured to measure directory request "
- "statistics, but no GeoIP database found!");
- return -1;
- }
- if (options->EntryStatistics) {
- if (should_record_bridge_info(options)) {
- /* Don't allow measuring statistics on entry guards when configured
- * as bridge. */
- log_warn(LD_CONFIG, "Bridges cannot be configured to measure "
- "additional GeoIP statistics as entry guards.");
- return -1;
- } else if (!geoip_is_loaded()) {
- /* Check if GeoIP database could be loaded. */
- log_warn(LD_CONFIG, "Configured to measure entry node statistics, "
- "but no GeoIP database found!");
- return -1;
- }
- }
- /* Check if we need to parse and add the EntryNodes config option. */
- if (options->EntryNodes &&
- (!old_options ||
- (!routerset_equal(old_options->EntryNodes,options->EntryNodes))))
- entry_nodes_should_be_added();
- /* Since our options changed, we might need to regenerate and upload our
- * server descriptor.
- */
- if (!old_options ||
- options_transition_affects_descriptor(old_options, options))
- mark_my_descriptor_dirty();
- /* We may need to reschedule some directory stuff if our status changed. */
- if (old_options) {
- if (authdir_mode_v3(options) && !authdir_mode_v3(old_options))
- dirvote_recalculate_timing(options, time(NULL));
- if (!bool_eq(directory_fetches_dir_info_early(options),
- directory_fetches_dir_info_early(old_options)) ||
- !bool_eq(directory_fetches_dir_info_later(options),
- directory_fetches_dir_info_later(old_options))) {
- /* Make sure update_router_have_min_dir_info gets called. */
- router_dir_info_changed();
- /* We might need to download a new consensus status later or sooner than
- * we had expected. */
- update_consensus_networkstatus_fetch_time(time(NULL));
- }
- }
- /* Load the webpage we're going to serve every time someone asks for '/' on
- our DirPort. */
- tor_free(global_dirfrontpagecontents);
- if (options->DirPortFrontPage) {
- global_dirfrontpagecontents =
- read_file_to_str(options->DirPortFrontPage, 0, NULL);
- if (!global_dirfrontpagecontents) {
- log_warn(LD_CONFIG,
- "DirPortFrontPage file '%s' not found. Continuing anyway.",
- options->DirPortFrontPage);
- }
- }
- return 0;
- }
- /*
- * Functions to parse config options
- */
- /** If <b>option</b> is an official abbreviation for a longer option,
- * return the longer option. Otherwise return <b>option</b>.
- * If <b>command_line</b> is set, apply all abbreviations. Otherwise, only
- * apply abbreviations that work for the config file and the command line.
- * If <b>warn_obsolete</b> is set, warn about deprecated names. */
- static const char *
- expand_abbrev(config_format_t *fmt, const char *option, int command_line,
- int warn_obsolete)
- {
- int i;
- if (! fmt->abbrevs)
- return option;
- for (i=0; fmt->abbrevs[i].abbreviated; ++i) {
- /* Abbreviations are case insensitive. */
- if (!strcasecmp(option,fmt->abbrevs[i].abbreviated) &&
- (command_line || !fmt->abbrevs[i].commandline_only)) {
- if (warn_obsolete && fmt->abbrevs[i].warn) {
- log_warn(LD_CONFIG,
- "The configuration option '%s' is deprecated; "
- "use '%s' instead.",
- fmt->abbrevs[i].abbreviated,
- fmt->abbrevs[i].full);
- }
- /* Keep going through the list in case we want to rewrite it more.
- * (We could imagine recursing here, but I don't want to get the
- * user into an infinite loop if we craft our list wrong.) */
- option = fmt->abbrevs[i].full;
- }
- }
- return option;
- }
- /** Helper: Read a list of configuration options from the command line.
- * If successful, put them in *<b>result</b> and return 0, and return
- * -1 and leave *<b>result</b> alone. */
- static int
- config_get_commandlines(int argc, char **argv, config_line_t **result)
- {
- config_line_t *front = NULL;
- config_line_t **new = &front;
- char *s;
- int i = 1;
- while (i < argc) {
- if (!strcmp(argv[i],"-f") ||
- !strcmp(argv[i],"--hash-password")) {
- i += 2; /* command-line option with argument. ignore them. */
- continue;
- } else if (!strcmp(argv[i],"--list-fingerprint") ||
- !strcmp(argv[i],"--verify-config") ||
- !strcmp(argv[i],"--ignore-missing-torrc") ||
- !strcmp(argv[i],"--quiet") ||
- !strcmp(argv[i],"--hush")) {
- i += 1; /* command-line option. ignore it. */
- continue;
- } else if (!strcmp(argv[i],"--nt-service") ||
- !strcmp(argv[i],"-nt-service")) {
- i += 1;
- continue;
- }
- if (i == argc-1) {
- log_warn(LD_CONFIG,"Command-line option '%s' with no value. Failing.",
- argv[i]);
- config_free_lines(front);
- return -1;
- }
- *new = tor_malloc_zero(sizeof(config_line_t));
- s = argv[i];
- /* Each keyword may be prefixed with one or two dashes. */
- if (*s == '-')
- s++;
- if (*s == '-')
- s++;
- (*new)->key = tor_strdup(expand_abbrev(&options_format, s, 1, 1));
- (*new)->value = tor_strdup(argv[i+1]);
- (*new)->next = NULL;
- log(LOG_DEBUG, LD_CONFIG, "command line: parsed keyword '%s', value '%s'",
- (*new)->key, (*new)->value);
- new = &((*new)->next);
- i += 2;
- }
- *result = front;
- return 0;
- }
- /** Helper: allocate a new configuration option mapping 'key' to 'val',
- * append it to *<b>lst</b>. */
- static void
- config_line_append(config_line_t **lst,
- const char *key,
- const char *val)
- {
- config_line_t *newline;
- newline = tor_malloc(sizeof(config_line_t));
- newline->key = tor_strdup(key);
- newline->value = tor_strdup(val);
- newline->next = NULL;
- while (*lst)
- lst = &((*lst)->next);
- (*lst) = newline;
- }
- /** Helper: parse the config string and strdup into key/value
- * strings. Set *result to the list, or NULL if parsing the string
- * failed. Return 0 on success, -1 on failure. Warn and ignore any
- * misformatted lines. */
- int
- config_get_lines(const char *string, config_line_t **result)
- {
- config_line_t *list = NULL, **next;
- char *k, *v;
- next = &list;
- do {
- k = v = NULL;
- string = parse_config_line_from_str(string, &k, &v);
- if (!string) {
- config_free_lines(list);
- tor_free(k);
- tor_free(v);
- return -1;
- }
- if (k && v) {
- /* This list can get long, so we keep a pointer to the end of it
- * rather than using config_line_append over and over and getting
- * n^2 performance. */
- *next = tor_malloc(sizeof(config_line_t));
- (*next)->key = k;
- (*next)->value = v;
- (*next)->next = NULL;
- next = &((*next)->next);
- } else {
- tor_free(k);
- tor_free(v);
- }
- } while (*string);
- *result = list;
- return 0;
- }
- /**
- * Free all the configuration lines on the linked list <b>front</b>.
- */
- void
- config_free_lines(config_line_t *front)
- {
- config_line_t *tmp;
- while (front) {
- tmp = front;
- front = tmp->next;
- tor_free(tmp->key);
- tor_free(tmp->value);
- tor_free(tmp);
- }
- }
- /** If <b>key</b> is a configuration option, return the corresponding
- * config_var_t. Otherwise, if <b>key</b> is a non-standard abbreviation,
- * warn, and return the corresponding config_var_t. Otherwise return NULL.
- */
- static config_var_t *
- config_find_option(config_format_t *fmt, const char *key)
- {
- int i;
- size_t keylen = strlen(key);
- if (!keylen)
- return NULL; /* if they say "--" on the command line, it's not an option */
- /* First, check for an exact (case-insensitive) match */
- for (i=0; fmt->vars[i].name; ++i) {
- if (!strcasecmp(key, fmt->vars[i].name)) {
- return &fmt->vars[i];
- }
- }
- /* If none, check for an abbreviated match */
- for (i=0; fmt->vars[i].name; ++i) {
- if (!strncasecmp(key, fmt->vars[i].name, keylen)) {
- log_warn(LD_CONFIG, "The abbreviation '%s' is deprecated. "
- "Please use '%s' instead",
- key, fmt->vars[i].name);
- return &fmt->vars[i];
- }
- }
- /* Okay, unrecognized option */
- return NULL;
- }
- /*
- * Functions to assign config options.
- */
- /** <b>c</b>-\>key is known to be a real key. Update <b>options</b>
- * with <b>c</b>-\>value and return 0, or return -1 if bad value.
- *
- * Called from config_assign_line() and option_reset().
- */
- static int
- config_assign_value(config_format_t *fmt, or_options_t *options,
- config_line_t *c, char **msg)
- {
- int i, r, ok;
- char buf[1024];
- config_var_t *var;
- void *lvalue;
- CHECK(fmt, options);
- var = config_find_option(fmt, c->key);
- tor_assert(var);
- lvalue = STRUCT_VAR_P(options, var->var_offset);
- switch (var->type) {
- case CONFIG_TYPE_UINT:
- i = (int)tor_parse_long(c->value, 10, 0, INT_MAX, &ok, NULL);
- if (!ok) {
- r = tor_snprintf(buf, sizeof(buf),
- "Int keyword '%s %s' is malformed or out of bounds.",
- c->key, c->value);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- *(int *)lvalue = i;
- break;
- case CONFIG_TYPE_INTERVAL: {
- i = config_parse_interval(c->value, &ok);
- if (!ok) {
- r = tor_snprintf(buf, sizeof(buf),
- "Interval '%s %s' is malformed or out of bounds.",
- c->key, c->value);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- *(int *)lvalue = i;
- break;
- }
- case CONFIG_TYPE_MEMUNIT: {
- uint64_t u64 = config_parse_memunit(c->value, &ok);
- if (!ok) {
- r = tor_snprintf(buf, sizeof(buf),
- "Value '%s %s' is malformed or out of bounds.",
- c->key, c->value);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- *(uint64_t *)lvalue = u64;
- break;
- }
- case CONFIG_TYPE_BOOL:
- i = (int)tor_parse_long(c->value, 10, 0, 1, &ok, NULL);
- if (!ok) {
- r = tor_snprintf(buf, sizeof(buf),
- "Boolean '%s %s' expects 0 or 1.",
- c->key, c->value);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- *(int *)lvalue = i;
- break;
- case CONFIG_TYPE_STRING:
- case CONFIG_TYPE_FILENAME:
- tor_free(*(char **)lvalue);
- *(char **)lvalue = tor_strdup(c->value);
- break;
- case CONFIG_TYPE_DOUBLE:
- *(double *)lvalue = atof(c->value);
- break;
- case CONFIG_TYPE_ISOTIME:
- if (parse_iso_time(c->value, (time_t *)lvalue)) {
- r = tor_snprintf(buf, sizeof(buf),
- "Invalid time '%s' for keyword '%s'", c->value, c->key);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- break;
- case CONFIG_TYPE_ROUTERSET:
- if (*(routerset_t**)lvalue) {
- routerset_free(*(routerset_t**)lvalue);
- }
- *(routerset_t**)lvalue = routerset_new();
- if (routerset_parse(*(routerset_t**)lvalue, c->value, c->key)<0) {
- tor_snprintf(buf, sizeof(buf), "Invalid exit list '%s' for option '%s'",
- c->value, c->key);
- *msg = tor_strdup(buf);
- return -1;
- }
- break;
- case CONFIG_TYPE_CSV:
- if (*(smartlist_t**)lvalue) {
- SMARTLIST_FOREACH(*(smartlist_t**)lvalue, char *, cp, tor_free(cp));
- smartlist_clear(*(smartlist_t**)lvalue);
- } else {
- *(smartlist_t**)lvalue = smartlist_create();
- }
- smartlist_split_string(*(smartlist_t**)lvalue, c->value, ",",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- break;
- case CONFIG_TYPE_LINELIST:
- case CONFIG_TYPE_LINELIST_S:
- config_line_append((config_line_t**)lvalue, c->key, c->value);
- break;
- case CONFIG_TYPE_OBSOLETE:
- log_warn(LD_CONFIG, "Skipping obsolete configuration option '%s'", c->key);
- break;
- case CONFIG_TYPE_LINELIST_V:
- r = tor_snprintf(buf, sizeof(buf),
- "You may not provide a value for virtual option '%s'", c->key);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- default:
- tor_assert(0);
- break;
- }
- return 0;
- }
- /** If <b>c</b> is a syntactically valid configuration line, update
- * <b>options</b> with its value and return 0. Otherwise return -1 for bad
- * key, -2 for bad value.
- *
- * If <b>clear_first</b> is set, clear the value first. Then if
- * <b>use_defaults</b> is set, set the value to the default.
- *
- * Called from config_assign().
- */
- static int
- config_assign_line(config_format_t *fmt, or_options_t *options,
- config_line_t *c, int use_defaults,
- int clear_first, char **msg)
- {
- config_var_t *var;
- CHECK(fmt, options);
- var = config_find_option(fmt, c->key);
- if (!var) {
- if (fmt->extra) {
- void *lvalue = STRUCT_VAR_P(options, fmt->extra->var_offset);
- log_info(LD_CONFIG,
- "Found unrecognized option '%s'; saving it.", c->key);
- config_line_append((config_line_t**)lvalue, c->key, c->value);
- return 0;
- } else {
- char buf[1024];
- int tmp = tor_snprintf(buf, sizeof(buf),
- "Unknown option '%s'. Failing.", c->key);
- *msg = tor_strdup(tmp >= 0 ? buf : "internal error");
- return -1;
- }
- }
- /* Put keyword into canonical case. */
- if (strcmp(var->name, c->key)) {
- tor_free(c->key);
- c->key = tor_strdup(var->name);
- }
- if (!strlen(c->value)) {
- /* reset or clear it, then return */
- if (!clear_first) {
- if (var->type == CONFIG_TYPE_LINELIST ||
- var->type == CONFIG_TYPE_LINELIST_S) {
- /* We got an empty linelist from the torrc or command line.
- As a special case, call this an error. Warn and ignore. */
- log_warn(LD_CONFIG,
- "Linelist option '%s' has no value. Skipping.", c->key);
- } else { /* not already cleared */
- option_reset(fmt, options, var, use_defaults);
- }
- }
- return 0;
- }
- if (config_assign_value(fmt, options, c, msg) < 0)
- return -2;
- return 0;
- }
- /** Restore the option named <b>key</b> in options to its default value.
- * Called from config_assign(). */
- static void
- config_reset_line(config_format_t *fmt, or_options_t *options,
- const char *key, int use_defaults)
- {
- config_var_t *var;
- CHECK(fmt, options);
- var = config_find_option(fmt, key);
- if (!var)
- return; /* give error on next pass. */
- option_reset(fmt, options, var, use_defaults);
- }
- /** Return true iff key is a valid configuration option. */
- int
- option_is_recognized(const char *key)
- {
- config_var_t *var = config_find_option(&options_format, key);
- return (var != NULL);
- }
- /** Return the canonical name of a configuration option, or NULL
- * if no such option exists. */
- const char *
- option_get_canonical_name(const char *key)
- {
- config_var_t *var = config_find_option(&options_format, key);
- return var ? var->name : NULL;
- }
- /** Return a canonical list of the options assigned for key.
- */
- config_line_t *
- option_get_assignment(or_options_t *options, const char *key)
- {
- return get_assigned_option(&options_format, options, key, 1);
- }
- /** Return true iff value needs to be quoted and escaped to be used in
- * a configuration file. */
- static int
- config_value_needs_escape(const char *value)
- {
- if (*value == '\"')
- return 1;
- while (*value) {
- switch (*value)
- {
- case '\r':
- case '\n':
- case '#':
- /* Note: quotes and backspaces need special handling when we are using
- * quotes, not otherwise, so they don't trigger escaping on their
- * own. */
- return 1;
- default:
- if (!TOR_ISPRINT(*value))
- return 1;
- }
- ++value;
- }
- return 0;
- }
- /** Return a newly allocated deep copy of the lines in <b>inp</b>. */
- static config_line_t *
- config_lines_dup(const config_line_t *inp)
- {
- config_line_t *result = NULL;
- config_line_t **next_out = &result;
- while (inp) {
- *next_out = tor_malloc(sizeof(config_line_t));
- (*next_out)->key = tor_strdup(inp->key);
- (*next_out)->value = tor_strdup(inp->value);
- inp = inp->next;
- next_out = &((*next_out)->next);
- }
- (*next_out) = NULL;
- return result;
- }
- /** Return newly allocated line or lines corresponding to <b>key</b> in the
- * configuration <b>options</b>. If <b>escape_val</b> is true and a
- * value needs to be quoted before it's put in a config file, quote and
- * escape that value. Return NULL if no such key exists. */
- static config_line_t *
- get_assigned_option(config_format_t *fmt, void *options,
- const char *key, int escape_val)
- {
- config_var_t *var;
- const void *value;
- char buf[32];
- config_line_t *result;
- tor_assert(options && key);
- CHECK(fmt, options);
- var = config_find_option(fmt, key);
- if (!var) {
- log_warn(LD_CONFIG, "Unknown option '%s'. Failing.", key);
- return NULL;
- }
- value = STRUCT_VAR_P(options, var->var_offset);
- result = tor_malloc_zero(sizeof(config_line_t));
- result->key = tor_strdup(var->name);
- switch (var->type)
- {
- case CONFIG_TYPE_STRING:
- case CONFIG_TYPE_FILENAME:
- if (*(char**)value) {
- result->value = tor_strdup(*(char**)value);
- } else {
- tor_free(result->key);
- tor_free(result);
- return NULL;
- }
- break;
- case CONFIG_TYPE_ISOTIME:
- if (*(time_t*)value) {
- result->value = tor_malloc(ISO_TIME_LEN+1);
- format_iso_time(result->value, *(time_t*)value);
- } else {
- tor_free(result->key);
- tor_free(result);
- }
- escape_val = 0; /* Can't need escape. */
- break;
- case CONFIG_TYPE_INTERVAL:
- case CONFIG_TYPE_UINT:
- /* This means every or_options_t uint or bool element
- * needs to be an int. Not, say, a uint16_t or char. */
- tor_snprintf(buf, sizeof(buf), "%d", *(int*)value);
- result->value = tor_strdup(buf);
- escape_val = 0; /* Can't need escape. */
- break;
- case CONFIG_TYPE_MEMUNIT:
- tor_snprintf(buf, sizeof(buf), U64_FORMAT,
- U64_PRINTF_ARG(*(uint64_t*)value));
- result->value = tor_strdup(buf);
- escape_val = 0; /* Can't need escape. */
- break;
- case CONFIG_TYPE_DOUBLE:
- tor_snprintf(buf, sizeof(buf), "%f", *(double*)value);
- result->value = tor_strdup(buf);
- escape_val = 0; /* Can't need escape. */
- break;
- case CONFIG_TYPE_BOOL:
- result->value = tor_strdup(*(int*)value ? "1" : "0");
- escape_val = 0; /* Can't need escape. */
- break;
- case CONFIG_TYPE_ROUTERSET:
- result->value = routerset_to_string(*(routerset_t**)value);
- break;
- case CONFIG_TYPE_CSV:
- if (*(smartlist_t**)value)
- result->value =
- smartlist_join_strings(*(smartlist_t**)value, ",", 0, NULL);
- else
- result->value = tor_strdup("");
- break;
- case CONFIG_TYPE_OBSOLETE:
- log_fn(LOG_PROTOCOL_WARN, LD_CONFIG,
- "You asked me for the value of an obsolete config option '%s'.",
- key);
- tor_free(result->key);
- tor_free(result);
- return NULL;
- case CONFIG_TYPE_LINELIST_S:
- log_warn(LD_CONFIG,
- "Can't return context-sensitive '%s' on its own", key);
- tor_free(result->key);
- tor_free(result);
- return NULL;
- case CONFIG_TYPE_LINELIST:
- case CONFIG_TYPE_LINELIST_V:
- tor_free(result->key);
- tor_free(result);
- result = config_lines_dup(*(const config_line_t**)value);
- break;
- default:
- tor_free(result->key);
- tor_free(result);
- log_warn(LD_BUG,"Unknown type %d for known key '%s'",
- var->type, key);
- return NULL;
- }
- if (escape_val) {
- config_line_t *line;
- for (line = result; line; line = line->next) {
- if (line->value && config_value_needs_escape(line->value)) {
- char *newval = esc_for_log(line->value);
- tor_free(line->value);
- line->value = newval;
- }
- }
- }
- return result;
- }
- /** Iterate through the linked list of requested options <b>list</b>.
- * For each item, convert as appropriate and assign to <b>options</b>.
- * If an item is unrecognized, set *msg and return -1 immediately,
- * else return 0 for success.
- *
- * If <b>clear_first</b>, interpret config options as replacing (not
- * extending) their previous values. If <b>clear_first</b> is set,
- * then <b>use_defaults</b> to decide if you set to defaults after
- * clearing, or make the value 0 or NULL.
- *
- * Here are the use cases:
- * 1. A non-empty AllowInvalid line in your torrc. Appends to current
- * if linelist, replaces current if csv.
- * 2. An empty AllowInvalid line in your torrc. Should clear it.
- * 3. "RESETCONF AllowInvalid" sets it to default.
- * 4. "SETCONF AllowInvalid" makes it NULL.
- * 5. "SETCONF AllowInvalid=foo" clears it and sets it to "foo".
- *
- * Use_defaults Clear_first
- * 0 0 "append"
- * 1 0 undefined, don't use
- * 0 1 "set to null first"
- * 1 1 "set to defaults first"
- * Return 0 on success, -1 on bad key, -2 on bad value.
- *
- * As an additional special case, if a LINELIST config option has
- * no value and clear_first is 0, then warn and ignore it.
- */
- /*
- There are three call cases for config_assign() currently.
- Case one: Torrc entry
- options_init_from_torrc() calls config_assign(0, 0)
- calls config_assign_line(0, 0).
- if value is empty, calls option_reset(0) and returns.
- calls config_assign_value(), appends.
- Case two: setconf
- options_trial_assign() calls config_assign(0, 1)
- calls config_reset_line(0)
- calls option_reset(0)
- calls option_clear().
- calls config_assign_line(0, 1).
- if value is empty, returns.
- calls config_assign_value(), appends.
- Case three: resetconf
- options_trial_assign() calls config_assign(1, 1)
- calls config_reset_line(1)
- calls option_reset(1)
- calls option_clear().
- calls config_assign_value(default)
- calls config_assign_line(1, 1).
- returns.
- */
- static int
- config_assign(config_format_t *fmt, void *options, config_line_t *list,
- int use_defaults, int clear_first, char **msg)
- {
- config_line_t *p;
- CHECK(fmt, options);
- /* pass 1: normalize keys */
- for (p = list; p; p = p->next) {
- const char *full = expand_abbrev(fmt, p->key, 0, 1);
- if (strcmp(full,p->key)) {
- tor_free(p->key);
- p->key = tor_strdup(full);
- }
- }
- /* pass 2: if we're reading from a resetting source, clear all
- * mentioned config options, and maybe set to their defaults. */
- if (clear_first) {
- for (p = list; p; p = p->next)
- config_reset_line(fmt, options, p->key, use_defaults);
- }
- /* pass 3: assign. */
- while (list) {
- int r;
- if ((r=config_assign_line(fmt, options, list, use_defaults,
- clear_first, msg)))
- return r;
- list = list->next;
- }
- return 0;
- }
- /** Try assigning <b>list</b> to the global options. You do this by duping
- * options, assigning list to the new one, then validating it. If it's
- * ok, then throw out the old one and stick with the new one. Else,
- * revert to old and return failure. Return SETOPT_OK on success, or
- * a setopt_err_t on failure.
- *
- * If not success, point *<b>msg</b> to a newly allocated string describing
- * what went wrong.
- */
- setopt_err_t
- options_trial_assign(config_line_t *list, int use_defaults,
- int clear_first, char **msg)
- {
- int r;
- or_options_t *trial_options = options_dup(&options_format, get_options());
- if ((r=config_assign(&options_format, trial_options,
- list, use_defaults, clear_first, msg)) < 0) {
- config_free(&options_format, trial_options);
- return r;
- }
- if (options_validate(get_options(), trial_options, 1, msg) < 0) {
- config_free(&options_format, trial_options);
- return SETOPT_ERR_PARSE; /*XXX make this a separate return value. */
- }
- if (options_transition_allowed(get_options(), trial_options, msg) < 0) {
- config_free(&options_format, trial_options);
- return SETOPT_ERR_TRANSITION;
- }
- if (set_options(trial_options, msg)<0) {
- config_free(&options_format, trial_options);
- return SETOPT_ERR_SETTING;
- }
- /* we liked it. put it in place. */
- return SETOPT_OK;
- }
- /** Reset config option <b>var</b> to 0, 0.0, NULL, or the equivalent.
- * Called from option_reset() and config_free(). */
- static void
- option_clear(config_format_t *fmt, or_options_t *options, config_var_t *var)
- {
- void *lvalue = STRUCT_VAR_P(options, var->var_offset);
- (void)fmt; /* unused */
- switch (var->type) {
- case CONFIG_TYPE_STRING:
- case CONFIG_TYPE_FILENAME:
- tor_free(*(char**)lvalue);
- break;
- case CONFIG_TYPE_DOUBLE:
- *(double*)lvalue = 0.0;
- break;
- case CONFIG_TYPE_ISOTIME:
- *(time_t*)lvalue = 0;
- break;
- case CONFIG_TYPE_INTERVAL:
- case CONFIG_TYPE_UINT:
- case CONFIG_TYPE_BOOL:
- *(int*)lvalue = 0;
- break;
- case CONFIG_TYPE_MEMUNIT:
- *(uint64_t*)lvalue = 0;
- break;
- case CONFIG_TYPE_ROUTERSET:
- if (*(routerset_t**)lvalue) {
- routerset_free(*(routerset_t**)lvalue);
- *(routerset_t**)lvalue = NULL;
- }
- break;
- case CONFIG_TYPE_CSV:
- if (*(smartlist_t**)lvalue) {
- SMARTLIST_FOREACH(*(smartlist_t **)lvalue, char *, cp, tor_free(cp));
- smartlist_free(*(smartlist_t **)lvalue);
- *(smartlist_t **)lvalue = NULL;
- }
- break;
- case CONFIG_TYPE_LINELIST:
- case CONFIG_TYPE_LINELIST_S:
- config_free_lines(*(config_line_t **)lvalue);
- *(config_line_t **)lvalue = NULL;
- break;
- case CONFIG_TYPE_LINELIST_V:
- /* handled by linelist_s. */
- break;
- case CONFIG_TYPE_OBSOLETE:
- break;
- }
- }
- /** Clear the option indexed by <b>var</b> in <b>options</b>. Then if
- * <b>use_defaults</b>, set it to its default value.
- * Called by config_init() and option_reset_line() and option_assign_line(). */
- static void
- option_reset(config_format_t *fmt, or_options_t *options,
- config_var_t *var, int use_defaults)
- {
- config_line_t *c;
- char *msg = NULL;
- CHECK(fmt, options);
- option_clear(fmt, options, var); /* clear it first */
- if (!use_defaults)
- return; /* all done */
- if (var->initvalue) {
- c = tor_malloc_zero(sizeof(config_line_t));
- c->key = tor_strdup(var->name);
- c->value = tor_strdup(var->initvalue);
- if (config_assign_value(fmt, options, c, &msg) < 0) {
- log_warn(LD_BUG, "Failed to assign default: %s", msg);
- tor_free(msg); /* if this happens it's a bug */
- }
- config_free_lines(c);
- }
- }
- /** Print a usage message for tor. */
- static void
- print_usage(void)
- {
- printf(
- "Copyright (c) 2001-2004, Roger Dingledine\n"
- "Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson\n"
- "Copyright (c) 2007-2009, The Tor Project, Inc.\n\n"
- "tor -f <torrc> [args]\n"
- "See man page for options, or https://www.torproject.org/ for "
- "documentation.\n");
- }
- /** Print all non-obsolete torrc options. */
- static void
- list_torrc_options(void)
- {
- int i;
- smartlist_t *lines = smartlist_create();
- for (i = 0; _option_vars[i].name; ++i) {
- config_var_t *var = &_option_vars[i];
- if (var->type == CONFIG_TYPE_OBSOLETE ||
- var->type == CONFIG_TYPE_LINELIST_V)
- continue;
- printf("%s\n", var->name);
- }
- smartlist_free(lines);
- }
- /** Last value actually set by resolve_my_address. */
- static uint32_t last_resolved_addr = 0;
- /**
- * Based on <b>options-\>Address</b>, guess our public IP address and put it
- * (in host order) into *<b>addr_out</b>. If <b>hostname_out</b> is provided,
- * set *<b>hostname_out</b> to a new string holding the hostname we used to
- * get the address. Return 0 if all is well, or -1 if we can't find a suitable
- * public IP address.
- */
- int
- resolve_my_address(int warn_severity, or_options_t *options,
- uint32_t *addr_out, char **hostname_out)
- {
- struct in_addr in;
- struct hostent *rent;
- char hostname[256];
- int explicit_ip=1;
- int explicit_hostname=1;
- int from_interface=0;
- char tmpbuf[INET_NTOA_BUF_LEN];
- const char *address = options->Address;
- int notice_severity = warn_severity <= LOG_NOTICE ?
- LOG_NOTICE : warn_severity;
- tor_assert(addr_out);
- if (address && *address) {
- strlcpy(hostname, address, sizeof(hostname));
- } else { /* then we need to guess our address */
- explicit_ip = 0; /* it's implicit */
- explicit_hostname = 0; /* it's implicit */
- if (gethostname(hostname, sizeof(hostname)) < 0) {
- log_fn(warn_severity, LD_NET,"Error obtaining local hostname");
- return -1;
- }
- log_debug(LD_CONFIG,"Guessed local host name as '%s'",hostname);
- }
- /* now we know hostname. resolve it and keep only the IP address */
- if (tor_inet_aton(hostname, &in) == 0) {
- /* then we have to resolve it */
- explicit_ip = 0;
- rent = (struct hostent *)gethostbyname(hostname);
- if (!rent) {
- uint32_t interface_ip;
- if (explicit_hostname) {
- log_fn(warn_severity, LD_CONFIG,
- "Could not resolve local Address '%s'. Failing.", hostname);
- return -1;
- }
- log_fn(notice_severity, LD_CONFIG,
- "Could not resolve guessed local hostname '%s'. "
- "Trying something else.", hostname);
- if (get_interface_address(warn_severity, &interface_ip)) {
- log_fn(warn_severity, LD_CONFIG,
- "Could not get local interface IP address. Failing.");
- return -1;
- }
- from_interface = 1;
- in.s_addr = htonl(interface_ip);
- tor_inet_ntoa(&in,tmpbuf,sizeof(tmpbuf));
- log_fn(notice_severity, LD_CONFIG, "Learned IP address '%s' for "
- "local interface. Using that.", tmpbuf);
- strlcpy(hostname, "<guessed from interfaces>", sizeof(hostname));
- } else {
- tor_assert(rent->h_length == 4);
- memcpy(&in.s_addr, rent->h_addr, rent->h_length);
- if (!explicit_hostname &&
- is_internal_IP(ntohl(in.s_addr), 0)) {
- uint32_t interface_ip;
- tor_inet_ntoa(&in,tmpbuf,sizeof(tmpbuf));
- log_fn(notice_severity, LD_CONFIG, "Guessed local hostname '%s' "
- "resolves to a private IP address (%s). Trying something "
- "else.", hostname, tmpbuf);
- if (get_interface_address(warn_severity, &interface_ip)) {
- log_fn(warn_severity, LD_CONFIG,
- "Could not get local interface IP address. Too bad.");
- } else if (is_internal_IP(interface_ip, 0)) {
- struct in_addr in2;
- in2.s_addr = htonl(interface_ip);
- tor_inet_ntoa(&in2,tmpbuf,sizeof(tmpbuf));
- log_fn(notice_severity, LD_CONFIG,
- "Interface IP address '%s' is a private address too. "
- "Ignoring.", tmpbuf);
- } else {
- from_interface = 1;
- in.s_addr = htonl(interface_ip);
- tor_inet_ntoa(&in,tmpbuf,sizeof(tmpbuf));
- log_fn(notice_severity, LD_CONFIG,
- "Learned IP address '%s' for local interface."
- " Using that.", tmpbuf);
- strlcpy(hostname, "<guessed from interfaces>", sizeof(hostname));
- }
- }
- }
- }
- tor_inet_ntoa(&in,tmpbuf,sizeof(tmpbuf));
- if (is_internal_IP(ntohl(in.s_addr), 0) &&
- options->_PublishServerDescriptor) {
- /* make sure we're ok with publishing an internal IP */
- if (!options->DirServers && !options->AlternateDirAuthority) {
- /* if they are using the default dirservers, disallow internal IPs
- * always. */
- log_fn(warn_severity, LD_CONFIG,
- "Address '%s' resolves to private IP address '%s'. "
- "Tor servers that use the default DirServers must have public "
- "IP addresses.", hostname, tmpbuf);
- return -1;
- }
- if (!explicit_ip) {
- /* even if they've set their own dirservers, require an explicit IP if
- * they're using an internal address. */
- log_fn(warn_severity, LD_CONFIG, "Address '%s' resolves to private "
- "IP address '%s'. Please set the Address config option to be "
- "the IP address you want to use.", hostname, tmpbuf);
- return -1;
- }
- }
- log_debug(LD_CONFIG, "Resolved Address to '%s'.", tmpbuf);
- *addr_out = ntohl(in.s_addr);
- if (last_resolved_addr && last_resolved_addr != *addr_out) {
- /* Leave this as a notice, regardless of the requested severity,
- * at least until dynamic IP address support becomes bulletproof. */
- log_notice(LD_NET,
- "Your IP address seems to have changed to %s. Updating.",
- tmpbuf);
- ip_address_changed(0);
- }
- if (last_resolved_addr != *addr_out) {
- const char *method;
- const char *h = hostname;
- if (explicit_ip) {
- method = "CONFIGURED";
- h = NULL;
- } else if (explicit_hostname) {
- method = "RESOLVED";
- } else if (from_interface) {
- method = "INTERFACE";
- h = NULL;
- } else {
- method = "GETHOSTNAME";
- }
- control_event_server_status(LOG_NOTICE,
- "EXTERNAL_ADDRESS ADDRESS=%s METHOD=%s %s%s",
- tmpbuf, method, h?"HOSTNAME=":"", h);
- }
- last_resolved_addr = *addr_out;
- if (hostname_out)
- *hostname_out = tor_strdup(hostname);
- return 0;
- }
- /** Return true iff <b>addr</b> is judged to be on the same network as us, or
- * on a private network.
- */
- int
- is_local_addr(const tor_addr_t *addr)
- {
- if (tor_addr_is_internal(addr, 0))
- return 1;
- /* Check whether ip is on the same /24 as we are. */
- if (get_options()->EnforceDistinctSubnets == 0)
- return 0;
- if (tor_addr_family(addr) == AF_INET) {
- /*XXXX022 IP6 what corresponds to an /24? */
- uint32_t ip = tor_addr_to_ipv4h(addr);
- /* It's possible that this next check will hit before the first time
- * resolve_my_address actually succeeds. (For clients, it is likely that
- * resolve_my_address will never be called at all). In those cases,
- * last_resolved_addr will be 0, and so checking to see whether ip is on
- * the same /24 as last_resolved_addr will be the same as checking whether
- * it was on net 0, which is already done by is_internal_IP.
- */
- if ((last_resolved_addr & (uint32_t)0xffffff00ul)
- == (ip & (uint32_t)0xffffff00ul))
- return 1;
- }
- return 0;
- }
- /** Called when we don't have a nickname set. Try to guess a good nickname
- * based on the hostname, and return it in a newly allocated string. If we
- * can't, return NULL and let the caller warn if it wants to. */
- static char *
- get_default_nickname(void)
- {
- static const char * const bad_default_nicknames[] = {
- "localhost",
- NULL,
- };
- char localhostname[256];
- char *cp, *out, *outp;
- int i;
- if (gethostname(localhostname, sizeof(localhostname)) < 0)
- return NULL;
- /* Put it in lowercase; stop at the first dot. */
- if ((cp = strchr(localhostname, '.')))
- *cp = '\0';
- tor_strlower(localhostname);
- /* Strip invalid characters. */
- cp = localhostname;
- out = outp = tor_malloc(strlen(localhostname) + 1);
- while (*cp) {
- if (strchr(LEGAL_NICKNAME_CHARACTERS, *cp))
- *outp++ = *cp++;
- else
- cp++;
- }
- *outp = '\0';
- /* Enforce length. */
- if (strlen(out) > MAX_NICKNAME_LEN)
- out[MAX_NICKNAME_LEN]='\0';
- /* Check for dumb names. */
- for (i = 0; bad_default_nicknames[i]; ++i) {
- if (!strcmp(out, bad_default_nicknames[i])) {
- tor_free(out);
- return NULL;
- }
- }
- return out;
- }
- /** Release storage held by <b>options</b>. */
- static void
- config_free(config_format_t *fmt, void *options)
- {
- int i;
- if (!options)
- return;
- tor_assert(fmt);
- for (i=0; fmt->vars[i].name; ++i)
- option_clear(fmt, options, &(fmt->vars[i]));
- if (fmt->extra) {
- config_line_t **linep = STRUCT_VAR_P(options, fmt->extra->var_offset);
- config_free_lines(*linep);
- *linep = NULL;
- }
- tor_free(options);
- }
- /** Return true iff a and b contain identical keys and values in identical
- * order. */
- static int
- config_lines_eq(config_line_t *a, config_line_t *b)
- {
- while (a && b) {
- if (strcasecmp(a->key, b->key) || strcmp(a->value, b->value))
- return 0;
- a = a->next;
- b = b->next;
- }
- if (a || b)
- return 0;
- return 1;
- }
- /** Return true iff the option <b>name</b> has the same value in <b>o1</b>
- * and <b>o2</b>. Must not be called for LINELIST_S or OBSOLETE options.
- */
- static int
- option_is_same(config_format_t *fmt,
- or_options_t *o1, or_options_t *o2, const char *name)
- {
- config_line_t *c1, *c2;
- int r = 1;
- CHECK(fmt, o1);
- CHECK(fmt, o2);
- c1 = get_assigned_option(fmt, o1, name, 0);
- c2 = get_assigned_option(fmt, o2, name, 0);
- r = config_lines_eq(c1, c2);
- config_free_lines(c1);
- config_free_lines(c2);
- return r;
- }
- /** Copy storage held by <b>old</b> into a new or_options_t and return it. */
- static or_options_t *
- options_dup(config_format_t *fmt, or_options_t *old)
- {
- or_options_t *newopts;
- int i;
- config_line_t *line;
- newopts = config_alloc(fmt);
- for (i=0; fmt->vars[i].name; ++i) {
- if (fmt->vars[i].type == CONFIG_TYPE_LINELIST_S)
- continue;
- if (fmt->vars[i].type == CONFIG_TYPE_OBSOLETE)
- continue;
- line = get_assigned_option(fmt, old, fmt->vars[i].name, 0);
- if (line) {
- char *msg = NULL;
- if (config_assign(fmt, newopts, line, 0, 0, &msg) < 0) {
- log_err(LD_BUG, "Config_get_assigned_option() generated "
- "something we couldn't config_assign(): %s", msg);
- tor_free(msg);
- tor_assert(0);
- }
- }
- config_free_lines(line);
- }
- return newopts;
- }
- /** Return a new empty or_options_t. Used for testing. */
- or_options_t *
- options_new(void)
- {
- return config_alloc(&options_format);
- }
- /** Set <b>options</b> to hold reasonable defaults for most options.
- * Each option defaults to zero. */
- void
- options_init(or_options_t *options)
- {
- config_init(&options_format, options);
- }
- /* Check if the port number given in <b>port_option</b> in combination with
- * the specified port in <b>listen_options</b> will result in Tor actually
- * opening a low port (meaning a port lower than 1024). Return 1 if
- * it is, or 0 if it isn't or the concept of a low port isn't applicable for
- * the platform we're on. */
- static int
- is_listening_on_low_port(uint16_t port_option,
- const config_line_t *listen_options)
- {
- #ifdef MS_WINDOWS
- (void) port_option;
- (void) listen_options;
- return 0; /* No port is too low for windows. */
- #else
- const config_line_t *l;
- uint16_t p;
- if (port_option == 0)
- return 0; /* We're not listening */
- if (listen_options == NULL)
- return (port_option < 1024);
- for (l = listen_options; l; l = l->next) {
- parse_addr_port(LOG_WARN, l->value, NULL, NULL, &p);
- if (p<1024) {
- return 1;
- }
- }
- return 0;
- #endif
- }
- /** Set all vars in the configuration object <b>options</b> to their default
- * values. */
- static void
- config_init(config_format_t *fmt, void *options)
- {
- int i;
- config_var_t *var;
- CHECK(fmt, options);
- for (i=0; fmt->vars[i].name; ++i) {
- var = &fmt->vars[i];
- if (!var->initvalue)
- continue; /* defaults to NULL or 0 */
- option_reset(fmt, options, var, 1);
- }
- }
- /** Allocate and return a new string holding the written-out values of the vars
- * in 'options'. If 'minimal', do not write out any default-valued vars.
- * Else, if comment_defaults, write default values as comments.
- */
- static char *
- config_dump(config_format_t *fmt, void *options, int minimal,
- int comment_defaults)
- {
- smartlist_t *elements;
- or_options_t *defaults;
- config_line_t *line, *assigned;
- char *result;
- int i;
- char *msg = NULL;
- defaults = config_alloc(fmt);
- config_init(fmt, defaults);
- /* XXX use a 1 here so we don't add a new log line while dumping */
- if (fmt->validate_fn(NULL,defaults, 1, &msg) < 0) {
- log_err(LD_BUG, "Failed to validate default config.");
- tor_free(msg);
- tor_assert(0);
- }
- elements = smartlist_create();
- for (i=0; fmt->vars[i].name; ++i) {
- int comment_option = 0;
- if (fmt->vars[i].type == CONFIG_TYPE_OBSOLETE ||
- fmt->vars[i].type == CONFIG_TYPE_LINELIST_S)
- continue;
- /* Don't save 'hidden' control variables. */
- if (!strcmpstart(fmt->vars[i].name, "__"))
- continue;
- if (minimal && option_is_same(fmt, options, defaults, fmt->vars[i].name))
- continue;
- else if (comment_defaults &&
- option_is_same(fmt, options, defaults, fmt->vars[i].name))
- comment_option = 1;
- line = assigned = get_assigned_option(fmt, options, fmt->vars[i].name, 1);
- for (; line; line = line->next) {
- size_t len = strlen(line->key) + strlen(line->value) + 5;
- char *tmp;
- tmp = tor_malloc(len);
- if (tor_snprintf(tmp, len, "%s%s %s\n",
- comment_option ? "# " : "",
- line->key, line->value)<0) {
- log_err(LD_BUG,"Internal error writing option value");
- tor_assert(0);
- }
- smartlist_add(elements, tmp);
- }
- config_free_lines(assigned);
- }
- if (fmt->extra) {
- line = *(config_line_t**)STRUCT_VAR_P(options, fmt->extra->var_offset);
- for (; line; line = line->next) {
- size_t len = strlen(line->key) + strlen(line->value) + 3;
- char *tmp;
- tmp = tor_malloc(len);
- if (tor_snprintf(tmp, len, "%s %s\n", line->key, line->value)<0) {
- log_err(LD_BUG,"Internal error writing option value");
- tor_assert(0);
- }
- smartlist_add(elements, tmp);
- }
- }
- result = smartlist_join_strings(elements, "", 0, NULL);
- SMARTLIST_FOREACH(elements, char *, cp, tor_free(cp));
- smartlist_free(elements);
- config_free(fmt, defaults);
- return result;
- }
- /** Return a string containing a possible configuration file that would give
- * the configuration in <b>options</b>. If <b>minimal</b> is true, do not
- * include options that are the same as Tor's defaults.
- */
- char *
- options_dump(or_options_t *options, int minimal)
- {
- return config_dump(&options_format, options, minimal, 0);
- }
- /** Return 0 if every element of sl is a string holding a decimal
- * representation of a port number, or if sl is NULL.
- * Otherwise set *msg and return -1. */
- static int
- validate_ports_csv(smartlist_t *sl, const char *name, char **msg)
- {
- int i;
- char buf[1024];
- tor_assert(name);
- if (!sl)
- return 0;
- SMARTLIST_FOREACH(sl, const char *, cp,
- {
- i = atoi(cp);
- if (i < 1 || i > 65535) {
- int r = tor_snprintf(buf, sizeof(buf),
- "Port '%s' out of range in %s", cp, name);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- });
- return 0;
- }
- /** If <b>value</b> exceeds ROUTER_MAX_DECLARED_BANDWIDTH, write
- * a complaint into *<b>msg</b> using string <b>desc</b>, and return -1.
- * Else return 0.
- */
- static int
- ensure_bandwidth_cap(uint64_t *value, const char *desc, char **msg)
- {
- int r;
- char buf[1024];
- if (*value > ROUTER_MAX_DECLARED_BANDWIDTH) {
- /* This handles an understandable special case where somebody says "2gb"
- * whereas our actual maximum is 2gb-1 (INT_MAX) */
- --*value;
- }
- if (*value > ROUTER_MAX_DECLARED_BANDWIDTH) {
- r = tor_snprintf(buf, sizeof(buf), "%s ("U64_FORMAT") must be at most %d",
- desc, U64_PRINTF_ARG(*value),
- ROUTER_MAX_DECLARED_BANDWIDTH);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- return 0;
- }
- /** Parse an authority type from <b>options</b>-\>PublishServerDescriptor
- * and write it to <b>options</b>-\>_PublishServerDescriptor. Treat "1"
- * as "v2,v3" unless BridgeRelay is 1, in which case treat it as "bridge".
- * Treat "0" as "".
- * Return 0 on success or -1 if not a recognized authority type (in which
- * case the value of _PublishServerDescriptor is undefined). */
- static int
- compute_publishserverdescriptor(or_options_t *options)
- {
- smartlist_t *list = options->PublishServerDescriptor;
- authority_type_t *auth = &options->_PublishServerDescriptor;
- *auth = NO_AUTHORITY;
- if (!list) /* empty list, answer is none */
- return 0;
- SMARTLIST_FOREACH(list, const char *, string, {
- if (!strcasecmp(string, "v1"))
- *auth |= V1_AUTHORITY;
- else if (!strcmp(string, "1"))
- if (options->BridgeRelay)
- *auth |= BRIDGE_AUTHORITY;
- else
- *auth |= V2_AUTHORITY | V3_AUTHORITY;
- else if (!strcasecmp(string, "v2"))
- *auth |= V2_AUTHORITY;
- else if (!strcasecmp(string, "v3"))
- *auth |= V3_AUTHORITY;
- else if (!strcasecmp(string, "bridge"))
- *auth |= BRIDGE_AUTHORITY;
- else if (!strcasecmp(string, "hidserv"))
- *auth |= HIDSERV_AUTHORITY;
- else if (!strcasecmp(string, "") || !strcmp(string, "0"))
- /* no authority */;
- else
- return -1;
- });
- return 0;
- }
- /** Lowest allowable value for RendPostPeriod; if this is too low, hidden
- * services can overload the directory system. */
- #define MIN_REND_POST_PERIOD (10*60)
- /** Highest allowable value for RendPostPeriod. */
- #define MAX_DIR_PERIOD (MIN_ONION_KEY_LIFETIME/2)
- /** Lowest allowable value for MaxCircuitDirtiness; if this is too low, Tor
- * will generate too many circuits and potentially overload the network. */
- #define MIN_MAX_CIRCUIT_DIRTINESS 10
- /** Lowest allowable value for CircuitStreamTimeout; if this is too low, Tor
- * will generate too many circuits and potentially overload the network. */
- #define MIN_CIRCUIT_STREAM_TIMEOUT 10
- /** Return 0 if every setting in <b>options</b> is reasonable, and a
- * permissible transition from <b>old_options</b>. Else return -1.
- * Should have no side effects, except for normalizing the contents of
- * <b>options</b>.
- *
- * On error, tor_strdup an error explanation into *<b>msg</b>.
- *
- * XXX
- * If <b>from_setconf</b>, we were called by the controller, and our
- * Log line should stay empty. If it's 0, then give us a default log
- * if there are no logs defined.
- */
- static int
- options_validate(or_options_t *old_options, or_options_t *options,
- int from_setconf, char **msg)
- {
- int i, r;
- config_line_t *cl;
- const char *uname = get_uname();
- char buf[1024];
- #define REJECT(arg) \
- STMT_BEGIN *msg = tor_strdup(arg); return -1; STMT_END
- #define COMPLAIN(arg) STMT_BEGIN log(LOG_WARN, LD_CONFIG, arg); STMT_END
- tor_assert(msg);
- *msg = NULL;
- if (options->ORPort < 0 || options->ORPort > 65535)
- REJECT("ORPort option out of bounds.");
- if (server_mode(options) &&
- (!strcmpstart(uname, "Windows 95") ||
- !strcmpstart(uname, "Windows 98") ||
- !strcmpstart(uname, "Windows Me"))) {
- log(LOG_WARN, LD_CONFIG, "Tor is running as a server, but you are "
- "running %s; this probably won't work. See "
- "https://wiki.torproject.org/TheOnionRouter/TorFAQ#ServerOS "
- "for details.", uname);
- }
- if (options->ORPort == 0 && options->ORListenAddress != NULL)
- REJECT("ORPort must be defined if ORListenAddress is defined.");
- if (options->DirPort == 0 && options->DirListenAddress != NULL)
- REJECT("DirPort must be defined if DirListenAddress is defined.");
- if (options->DNSPort == 0 && options->DNSListenAddress != NULL)
- REJECT("DNSPort must be defined if DNSListenAddress is defined.");
- if (options->ControlPort == 0 && options->ControlListenAddress != NULL)
- REJECT("ControlPort must be defined if ControlListenAddress is defined.");
- if (options->TransPort == 0 && options->TransListenAddress != NULL)
- REJECT("TransPort must be defined if TransListenAddress is defined.");
- if (options->NatdPort == 0 && options->NatdListenAddress != NULL)
- REJECT("NatdPort must be defined if NatdListenAddress is defined.");
- /* Don't gripe about SocksPort 0 with SocksListenAddress set; a standard
- * configuration does this. */
- for (i = 0; i < 3; ++i) {
- int is_socks = i==0;
- int is_trans = i==1;
- config_line_t *line, *opt, *old;
- const char *tp;
- if (is_socks) {
- opt = options->SocksListenAddress;
- old = old_options ? old_options->SocksListenAddress : NULL;
- tp = "SOCKS proxy";
- } else if (is_trans) {
- opt = options->TransListenAddress;
- old = old_options ? old_options->TransListenAddress : NULL;
- tp = "transparent proxy";
- } else {
- opt = options->NatdListenAddress;
- old = old_options ? old_options->NatdListenAddress : NULL;
- tp = "natd proxy";
- }
- for (line = opt; line; line = line->next) {
- char *address = NULL;
- uint16_t port;
- uint32_t addr;
- if (parse_addr_port(LOG_WARN, line->value, &address, &addr, &port)<0)
- continue; /* We'll warn about this later. */
- if (!is_internal_IP(addr, 1) &&
- (!old_options || !config_lines_eq(old, opt))) {
- log_warn(LD_CONFIG,
- "You specified a public address '%s' for a %s. Other "
- "people on the Internet might find your computer and use it as "
- "an open %s. Please don't allow this unless you have "
- "a good reason.", address, tp, tp);
- }
- tor_free(address);
- }
- }
- if (validate_data_directory(options)<0)
- REJECT("Invalid DataDirectory");
- if (options->Nickname == NULL) {
- if (server_mode(options)) {
- if (!(options->Nickname = get_default_nickname())) {
- log_notice(LD_CONFIG, "Couldn't pick a nickname based on "
- "our hostname; using %s instead.", UNNAMED_ROUTER_NICKNAME);
- options->Nickname = tor_strdup(UNNAMED_ROUTER_NICKNAME);
- } else {
- log_notice(LD_CONFIG, "Choosing default nickname '%s'",
- options->Nickname);
- }
- }
- } else {
- if (!is_legal_nickname(options->Nickname)) {
- r = tor_snprintf(buf, sizeof(buf),
- "Nickname '%s' is wrong length or contains illegal characters.",
- options->Nickname);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- }
- if (server_mode(options) && !options->ContactInfo)
- log(LOG_NOTICE, LD_CONFIG, "Your ContactInfo config option is not set. "
- "Please consider setting it, so we can contact you if your server is "
- "misconfigured or something else goes wrong.");
- /* Special case on first boot if no Log options are given. */
- if (!options->Logs && !options->RunAsDaemon && !from_setconf)
- config_line_append(&options->Logs, "Log", "notice stdout");
- if (options_init_logs(options, 1)<0) /* Validate the log(s) */
- REJECT("Failed to validate Log options. See logs for details.");
- if (options->NoPublish) {
- log(LOG_WARN, LD_CONFIG,
- "NoPublish is obsolete. Use PublishServerDescriptor instead.");
- SMARTLIST_FOREACH(options->PublishServerDescriptor, char *, s,
- tor_free(s));
- smartlist_clear(options->PublishServerDescriptor);
- }
- if (authdir_mode(options)) {
- /* confirm that our address isn't broken, so we can complain now */
- uint32_t tmp;
- if (resolve_my_address(LOG_WARN, options, &tmp, NULL) < 0)
- REJECT("Failed to resolve/guess local address. See logs for details.");
- }
- #ifndef MS_WINDOWS
- if (options->RunAsDaemon && torrc_fname && path_is_relative(torrc_fname))
- REJECT("Can't use a relative path to torrc when RunAsDaemon is set.");
- #endif
- if (options->SocksPort < 0 || options->SocksPort > 65535)
- REJECT("SocksPort option out of bounds.");
- if (options->DNSPort < 0 || options->DNSPort > 65535)
- REJECT("DNSPort option out of bounds.");
- if (options->TransPort < 0 || options->TransPort > 65535)
- REJECT("TransPort option out of bounds.");
- if (options->NatdPort < 0 || options->NatdPort > 65535)
- REJECT("NatdPort option out of bounds.");
- if (options->SocksPort == 0 && options->TransPort == 0 &&
- options->NatdPort == 0 && options->ORPort == 0 &&
- options->DNSPort == 0 && !options->RendConfigLines)
- log(LOG_WARN, LD_CONFIG,
- "SocksPort, TransPort, NatdPort, DNSPort, and ORPort are all "
- "undefined, and there aren't any hidden services configured. "
- "Tor will still run, but probably won't do anything.");
- if (options->ControlPort < 0 || options->ControlPort > 65535)
- REJECT("ControlPort option out of bounds.");
- if (options->DirPort < 0 || options->DirPort > 65535)
- REJECT("DirPort option out of bounds.");
- #ifndef USE_TRANSPARENT
- if (options->TransPort || options->TransListenAddress)
- REJECT("TransPort and TransListenAddress are disabled in this build.");
- #endif
- if (options->AccountingMax &&
- (is_listening_on_low_port(options->ORPort, options->ORListenAddress) ||
- is_listening_on_low_port(options->DirPort, options->DirListenAddress)))
- {
- log(LOG_WARN, LD_CONFIG,
- "You have set AccountingMax to use hibernation. You have also "
- "chosen a low DirPort or OrPort. This combination can make Tor stop "
- "working when it tries to re-attach the port after a period of "
- "hibernation. Please choose a different port or turn off "
- "hibernation unless you know this combination will work on your "
- "platform.");
- }
- if (options->ExcludeExitNodes || options->ExcludeNodes) {
- options->_ExcludeExitNodesUnion = routerset_new();
- routerset_union(options->_ExcludeExitNodesUnion,options->ExcludeExitNodes);
- routerset_union(options->_ExcludeExitNodesUnion,options->ExcludeNodes);
- }
- if (options->ExcludeNodes && options->StrictNodes) {
- COMPLAIN("You have asked to exclude certain relays from all positions "
- "in your circuits. Expect hidden services and other Tor "
- "features to be broken in unpredictable ways.");
- }
- if (options->EntryNodes && !routerset_is_list(options->EntryNodes)) {
- /* XXXX fix this; see entry_guards_prepend_from_config(). */
- REJECT("IPs or countries are not yet supported in EntryNodes.");
- }
- if (options->AuthoritativeDir) {
- if (!options->ContactInfo && !options->TestingTorNetwork)
- REJECT("Authoritative directory servers must set ContactInfo");
- if (options->V1AuthoritativeDir && !options->RecommendedVersions)
- REJECT("V1 authoritative dir servers must set RecommendedVersions.");
- if (!options->RecommendedClientVersions)
- options->RecommendedClientVersions =
- config_lines_dup(options->RecommendedVersions);
- if (!options->RecommendedServerVersions)
- options->RecommendedServerVersions =
- config_lines_dup(options->RecommendedVersions);
- if (options->VersioningAuthoritativeDir &&
- (!options->RecommendedClientVersions ||
- !options->RecommendedServerVersions))
- REJECT("Versioning authoritative dir servers must set "
- "Recommended*Versions.");
- if (options->UseEntryGuards) {
- log_info(LD_CONFIG, "Authoritative directory servers can't set "
- "UseEntryGuards. Disabling.");
- options->UseEntryGuards = 0;
- }
- if (!options->DownloadExtraInfo && authdir_mode_any_main(options)) {
- log_info(LD_CONFIG, "Authoritative directories always try to download "
- "extra-info documents. Setting DownloadExtraInfo.");
- options->DownloadExtraInfo = 1;
- }
- if (!(options->BridgeAuthoritativeDir || options->HSAuthoritativeDir ||
- options->V1AuthoritativeDir || options->V2AuthoritativeDir ||
- options->V3AuthoritativeDir))
- REJECT("AuthoritativeDir is set, but none of "
- "(Bridge/HS/V1/V2/V3)AuthoritativeDir is set.");
- /* If we have a v3bandwidthsfile and it's broken, complain on startup */
- if (options->V3BandwidthsFile && !old_options) {
- dirserv_read_measured_bandwidths(options->V3BandwidthsFile, NULL);
- }
- }
- if (options->AuthoritativeDir && !options->DirPort)
- REJECT("Running as authoritative directory, but no DirPort set.");
- if (options->AuthoritativeDir && !options->ORPort)
- REJECT("Running as authoritative directory, but no ORPort set.");
- if (options->AuthoritativeDir && options->ClientOnly)
- REJECT("Running as authoritative directory, but ClientOnly also set.");
- if (options->FetchDirInfoExtraEarly && !options->FetchDirInfoEarly)
- REJECT("FetchDirInfoExtraEarly requires that you also set "
- "FetchDirInfoEarly");
- if (options->ConnLimit <= 0) {
- r = tor_snprintf(buf, sizeof(buf),
- "ConnLimit must be greater than 0, but was set to %d",
- options->ConnLimit);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- if (validate_ports_csv(options->FirewallPorts, "FirewallPorts", msg) < 0)
- return -1;
- if (validate_ports_csv(options->LongLivedPorts, "LongLivedPorts", msg) < 0)
- return -1;
- if (validate_ports_csv(options->RejectPlaintextPorts,
- "RejectPlaintextPorts", msg) < 0)
- return -1;
- if (validate_ports_csv(options->WarnPlaintextPorts,
- "WarnPlaintextPorts", msg) < 0)
- return -1;
- if (options->FascistFirewall && !options->ReachableAddresses) {
- if (options->FirewallPorts && smartlist_len(options->FirewallPorts)) {
- /* We already have firewall ports set, so migrate them to
- * ReachableAddresses, which will set ReachableORAddresses and
- * ReachableDirAddresses if they aren't set explicitly. */
- smartlist_t *instead = smartlist_create();
- config_line_t *new_line = tor_malloc_zero(sizeof(config_line_t));
- new_line->key = tor_strdup("ReachableAddresses");
- /* If we're configured with the old format, we need to prepend some
- * open ports. */
- SMARTLIST_FOREACH(options->FirewallPorts, const char *, portno,
- {
- int p = atoi(portno);
- char *s;
- if (p<0) continue;
- s = tor_malloc(16);
- tor_snprintf(s, 16, "*:%d", p);
- smartlist_add(instead, s);
- });
- new_line->value = smartlist_join_strings(instead,",",0,NULL);
- /* These have been deprecated since 0.1.1.5-alpha-cvs */
- log(LOG_NOTICE, LD_CONFIG,
- "Converting FascistFirewall and FirewallPorts "
- "config options to new format: \"ReachableAddresses %s\"",
- new_line->value);
- options->ReachableAddresses = new_line;
- SMARTLIST_FOREACH(instead, char *, cp, tor_free(cp));
- smartlist_free(instead);
- } else {
- /* We do not have FirewallPorts set, so add 80 to
- * ReachableDirAddresses, and 443 to ReachableORAddresses. */
- if (!options->ReachableDirAddresses) {
- config_line_t *new_line = tor_malloc_zero(sizeof(config_line_t));
- new_line->key = tor_strdup("ReachableDirAddresses");
- new_line->value = tor_strdup("*:80");
- options->ReachableDirAddresses = new_line;
- log(LOG_NOTICE, LD_CONFIG, "Converting FascistFirewall config option "
- "to new format: \"ReachableDirAddresses *:80\"");
- }
- if (!options->ReachableORAddresses) {
- config_line_t *new_line = tor_malloc_zero(sizeof(config_line_t));
- new_line->key = tor_strdup("ReachableORAddresses");
- new_line->value = tor_strdup("*:443");
- options->ReachableORAddresses = new_line;
- log(LOG_NOTICE, LD_CONFIG, "Converting FascistFirewall config option "
- "to new format: \"ReachableORAddresses *:443\"");
- }
- }
- }
- for (i=0; i<3; i++) {
- config_line_t **linep =
- (i==0) ? &options->ReachableAddresses :
- (i==1) ? &options->ReachableORAddresses :
- &options->ReachableDirAddresses;
- if (!*linep)
- continue;
- /* We need to end with a reject *:*, not an implicit accept *:* */
- for (;;) {
- if (!strcmp((*linep)->value, "reject *:*")) /* already there */
- break;
- linep = &((*linep)->next);
- if (!*linep) {
- *linep = tor_malloc_zero(sizeof(config_line_t));
- (*linep)->key = tor_strdup(
- (i==0) ? "ReachableAddresses" :
- (i==1) ? "ReachableORAddresses" :
- "ReachableDirAddresses");
- (*linep)->value = tor_strdup("reject *:*");
- break;
- }
- }
- }
- if ((options->ReachableAddresses ||
- options->ReachableORAddresses ||
- options->ReachableDirAddresses) &&
- server_mode(options))
- REJECT("Servers must be able to freely connect to the rest "
- "of the Internet, so they must not set Reachable*Addresses "
- "or FascistFirewall.");
- if (options->UseBridges &&
- server_mode(options))
- REJECT("Servers must be able to freely connect to the rest "
- "of the Internet, so they must not set UseBridges.");
- options->_AllowInvalid = 0;
- if (options->AllowInvalidNodes) {
- SMARTLIST_FOREACH(options->AllowInvalidNodes, const char *, cp, {
- if (!strcasecmp(cp, "entry"))
- options->_AllowInvalid |= ALLOW_INVALID_ENTRY;
- else if (!strcasecmp(cp, "exit"))
- options->_AllowInvalid |= ALLOW_INVALID_EXIT;
- else if (!strcasecmp(cp, "middle"))
- options->_AllowInvalid |= ALLOW_INVALID_MIDDLE;
- else if (!strcasecmp(cp, "introduction"))
- options->_AllowInvalid |= ALLOW_INVALID_INTRODUCTION;
- else if (!strcasecmp(cp, "rendezvous"))
- options->_AllowInvalid |= ALLOW_INVALID_RENDEZVOUS;
- else {
- r = tor_snprintf(buf, sizeof(buf),
- "Unrecognized value '%s' in AllowInvalidNodes", cp);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- });
- }
- if (!options->SafeLogging ||
- !strcasecmp(options->SafeLogging, "0")) {
- options->_SafeLogging = SAFELOG_SCRUB_NONE;
- } else if (!strcasecmp(options->SafeLogging, "relay")) {
- options->_SafeLogging = SAFELOG_SCRUB_RELAY;
- } else if (!strcasecmp(options->SafeLogging, "1")) {
- options->_SafeLogging = SAFELOG_SCRUB_ALL;
- } else {
- r = tor_snprintf(buf, sizeof(buf),
- "Unrecognized value '%s' in SafeLogging",
- escaped(options->SafeLogging));
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- if (compute_publishserverdescriptor(options) < 0) {
- r = tor_snprintf(buf, sizeof(buf),
- "Unrecognized value in PublishServerDescriptor");
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- if ((options->BridgeRelay
- || options->_PublishServerDescriptor & BRIDGE_AUTHORITY)
- && (options->_PublishServerDescriptor
- & (V1_AUTHORITY|V2_AUTHORITY|V3_AUTHORITY))) {
- REJECT("Bridges are not supposed to publish router descriptors to the "
- "directory authorities. Please correct your "
- "PublishServerDescriptor line.");
- }
- if (options->MinUptimeHidServDirectoryV2 < 0) {
- log_warn(LD_CONFIG, "MinUptimeHidServDirectoryV2 option must be at "
- "least 0 seconds. Changing to 0.");
- options->MinUptimeHidServDirectoryV2 = 0;
- }
- if (options->RendPostPeriod < MIN_REND_POST_PERIOD) {
- log_warn(LD_CONFIG, "RendPostPeriod option is too short; "
- "raising to %d seconds.", MIN_REND_POST_PERIOD);
- options->RendPostPeriod = MIN_REND_POST_PERIOD;
- }
- if (options->RendPostPeriod > MAX_DIR_PERIOD) {
- log_warn(LD_CONFIG, "RendPostPeriod is too large; clipping to %ds.",
- MAX_DIR_PERIOD);
- options->RendPostPeriod = MAX_DIR_PERIOD;
- }
- if (options->MaxCircuitDirtiness < MIN_MAX_CIRCUIT_DIRTINESS) {
- log_warn(LD_CONFIG, "MaxCircuitDirtiness option is too short; "
- "raising to %d seconds.", MIN_MAX_CIRCUIT_DIRTINESS);
- options->MaxCircuitDirtiness = MIN_MAX_CIRCUIT_DIRTINESS;
- }
- if (options->CircuitStreamTimeout &&
- options->CircuitStreamTimeout < MIN_CIRCUIT_STREAM_TIMEOUT) {
- log_warn(LD_CONFIG, "CircuitStreamTimeout option is too short; "
- "raising to %d seconds.", MIN_CIRCUIT_STREAM_TIMEOUT);
- options->CircuitStreamTimeout = MIN_CIRCUIT_STREAM_TIMEOUT;
- }
- if (options->KeepalivePeriod < 1)
- REJECT("KeepalivePeriod option must be positive.");
- if (ensure_bandwidth_cap(&options->BandwidthRate,
- "BandwidthRate", msg) < 0)
- return -1;
- if (ensure_bandwidth_cap(&options->BandwidthBurst,
- "BandwidthBurst", msg) < 0)
- return -1;
- if (ensure_bandwidth_cap(&options->MaxAdvertisedBandwidth,
- "MaxAdvertisedBandwidth", msg) < 0)
- return -1;
- if (ensure_bandwidth_cap(&options->RelayBandwidthRate,
- "RelayBandwidthRate", msg) < 0)
- return -1;
- if (ensure_bandwidth_cap(&options->RelayBandwidthBurst,
- "RelayBandwidthBurst", msg) < 0)
- return -1;
- if (server_mode(options)) {
- if (options->BandwidthRate < ROUTER_REQUIRED_MIN_BANDWIDTH) {
- r = tor_snprintf(buf, sizeof(buf),
- "BandwidthRate is set to %d bytes/second. "
- "For servers, it must be at least %d.",
- (int)options->BandwidthRate,
- ROUTER_REQUIRED_MIN_BANDWIDTH);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- } else if (options->MaxAdvertisedBandwidth <
- ROUTER_REQUIRED_MIN_BANDWIDTH/2) {
- r = tor_snprintf(buf, sizeof(buf),
- "MaxAdvertisedBandwidth is set to %d bytes/second. "
- "For servers, it must be at least %d.",
- (int)options->MaxAdvertisedBandwidth,
- ROUTER_REQUIRED_MIN_BANDWIDTH/2);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- if (options->RelayBandwidthRate &&
- options->RelayBandwidthRate < ROUTER_REQUIRED_MIN_BANDWIDTH) {
- r = tor_snprintf(buf, sizeof(buf),
- "RelayBandwidthRate is set to %d bytes/second. "
- "For servers, it must be at least %d.",
- (int)options->RelayBandwidthRate,
- ROUTER_REQUIRED_MIN_BANDWIDTH);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- }
- if (options->RelayBandwidthRate && !options->RelayBandwidthBurst)
- options->RelayBandwidthBurst = options->RelayBandwidthRate;
- if (options->RelayBandwidthRate > options->RelayBandwidthBurst)
- REJECT("RelayBandwidthBurst must be at least equal "
- "to RelayBandwidthRate.");
- if (options->BandwidthRate > options->BandwidthBurst)
- REJECT("BandwidthBurst must be at least equal to BandwidthRate.");
- /* if they set relaybandwidth* really high but left bandwidth*
- * at the default, raise the defaults. */
- if (options->RelayBandwidthRate > options->BandwidthRate)
- options->BandwidthRate = options->RelayBandwidthRate;
- if (options->RelayBandwidthBurst > options->BandwidthBurst)
- options->BandwidthBurst = options->RelayBandwidthBurst;
- if (accounting_parse_options(options, 1)<0)
- REJECT("Failed to parse accounting options. See logs for details.");
- if (options->HttpProxy) { /* parse it now */
- if (tor_addr_port_parse(options->HttpProxy,
- &options->HttpProxyAddr, &options->HttpProxyPort) < 0)
- REJECT("HttpProxy failed to parse or resolve. Please fix.");
- if (options->HttpProxyPort == 0) { /* give it a default */
- options->HttpProxyPort = 80;
- }
- }
- if (options->HttpProxyAuthenticator) {
- if (strlen(options->HttpProxyAuthenticator) >= 48)
- REJECT("HttpProxyAuthenticator is too long (>= 48 chars).");
- }
- if (options->HttpsProxy) { /* parse it now */
- if (tor_addr_port_parse(options->HttpsProxy,
- &options->HttpsProxyAddr, &options->HttpsProxyPort) <0)
- REJECT("HttpsProxy failed to parse or resolve. Please fix.");
- if (options->HttpsProxyPort == 0) { /* give it a default */
- options->HttpsProxyPort = 443;
- }
- }
- if (options->HttpsProxyAuthenticator) {
- if (strlen(options->HttpsProxyAuthenticator) >= 48)
- REJECT("HttpsProxyAuthenticator is too long (>= 48 chars).");
- }
- if (options->Socks4Proxy) { /* parse it now */
- if (tor_addr_port_parse(options->Socks4Proxy,
- &options->Socks4ProxyAddr,
- &options->Socks4ProxyPort) <0)
- REJECT("Socks4Proxy failed to parse or resolve. Please fix.");
- if (options->Socks4ProxyPort == 0) { /* give it a default */
- options->Socks4ProxyPort = 1080;
- }
- }
- if (options->Socks5Proxy) { /* parse it now */
- if (tor_addr_port_parse(options->Socks5Proxy,
- &options->Socks5ProxyAddr,
- &options->Socks5ProxyPort) <0)
- REJECT("Socks5Proxy failed to parse or resolve. Please fix.");
- if (options->Socks5ProxyPort == 0) { /* give it a default */
- options->Socks5ProxyPort = 1080;
- }
- }
- if (options->Socks4Proxy && options->Socks5Proxy)
- REJECT("You cannot specify both Socks4Proxy and SOCKS5Proxy");
- if (options->Socks5ProxyUsername) {
- size_t len;
- len = strlen(options->Socks5ProxyUsername);
- if (len < 1 || len > 255)
- REJECT("Socks5ProxyUsername must be between 1 and 255 characters.");
- if (!options->Socks5ProxyPassword)
- REJECT("Socks5ProxyPassword must be included with Socks5ProxyUsername.");
- len = strlen(options->Socks5ProxyPassword);
- if (len < 1 || len > 255)
- REJECT("Socks5ProxyPassword must be between 1 and 255 characters.");
- } else if (options->Socks5ProxyPassword)
- REJECT("Socks5ProxyPassword must be included with Socks5ProxyUsername.");
- if (options->HashedControlPassword) {
- smartlist_t *sl = decode_hashed_passwords(options->HashedControlPassword);
- if (!sl) {
- REJECT("Bad HashedControlPassword: wrong length or bad encoding");
- } else {
- SMARTLIST_FOREACH(sl, char*, cp, tor_free(cp));
- smartlist_free(sl);
- }
- }
- if (options->HashedControlSessionPassword) {
- smartlist_t *sl = decode_hashed_passwords(
- options->HashedControlSessionPassword);
- if (!sl) {
- REJECT("Bad HashedControlSessionPassword: wrong length or bad encoding");
- } else {
- SMARTLIST_FOREACH(sl, char*, cp, tor_free(cp));
- smartlist_free(sl);
- }
- }
- if (options->ControlListenAddress) {
- int all_are_local = 1;
- config_line_t *ln;
- for (ln = options->ControlListenAddress; ln; ln = ln->next) {
- if (strcmpstart(ln->value, "127."))
- all_are_local = 0;
- }
- if (!all_are_local) {
- if (!options->HashedControlPassword &&
- !options->HashedControlSessionPassword &&
- !options->CookieAuthentication) {
- log_warn(LD_CONFIG,
- "You have a ControlListenAddress set to accept "
- "unauthenticated connections from a non-local address. "
- "This means that programs not running on your computer "
- "can reconfigure your Tor, without even having to guess a "
- "password. That's so bad that I'm closing your ControlPort "
- "for you. If you need to control your Tor remotely, try "
- "enabling authentication and using a tool like stunnel or "
- "ssh to encrypt remote access.");
- options->ControlPort = 0;
- } else {
- log_warn(LD_CONFIG, "You have a ControlListenAddress set to accept "
- "connections from a non-local address. This means that "
- "programs not running on your computer can reconfigure your "
- "Tor. That's pretty bad, since the controller "
- "protocol isn't encrypted! Maybe you should just listen on "
- "127.0.0.1 and use a tool like stunnel or ssh to encrypt "
- "remote connections to your control port.");
- }
- }
- }
- if (options->ControlPort && !options->HashedControlPassword &&
- !options->HashedControlSessionPassword &&
- !options->CookieAuthentication) {
- log_warn(LD_CONFIG, "ControlPort is open, but no authentication method "
- "has been configured. This means that any program on your "
- "computer can reconfigure your Tor. That's bad! You should "
- "upgrade your Tor controller as soon as possible.");
- }
- if (options->UseEntryGuards && ! options->NumEntryGuards)
- REJECT("Cannot enable UseEntryGuards with NumEntryGuards set to 0");
- if (check_nickname_list(options->MyFamily, "MyFamily", msg))
- return -1;
- for (cl = options->NodeFamilies; cl; cl = cl->next) {
- if (check_nickname_list(cl->value, "NodeFamily", msg))
- return -1;
- }
- if (validate_addr_policies(options, msg) < 0)
- return -1;
- if (validate_dir_authorities(options, old_options) < 0)
- REJECT("Directory authority line did not parse. See logs for details.");
- if (options->UseBridges && !options->Bridges)
- REJECT("If you set UseBridges, you must specify at least one bridge.");
- if (options->UseBridges && !options->TunnelDirConns)
- REJECT("If you set UseBridges, you must set TunnelDirConns.");
- if (options->Bridges) {
- for (cl = options->Bridges; cl; cl = cl->next) {
- if (parse_bridge_line(cl->value, 1)<0)
- REJECT("Bridge line did not parse. See logs for details.");
- }
- }
- if (options->ConstrainedSockets) {
- /* If the user wants to constrain socket buffer use, make sure the desired
- * limit is between MIN|MAX_TCPSOCK_BUFFER in k increments. */
- if (options->ConstrainedSockSize < MIN_CONSTRAINED_TCP_BUFFER ||
- options->ConstrainedSockSize > MAX_CONSTRAINED_TCP_BUFFER ||
- options->ConstrainedSockSize % 1024) {
- r = tor_snprintf(buf, sizeof(buf),
- "ConstrainedSockSize is invalid. Must be a value between %d and %d "
- "in 1024 byte increments.",
- MIN_CONSTRAINED_TCP_BUFFER, MAX_CONSTRAINED_TCP_BUFFER);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- if (options->DirPort) {
- /* Providing cached directory entries while system TCP buffers are scarce
- * will exacerbate the socket errors. Suggest that this be disabled. */
- COMPLAIN("You have requested constrained socket buffers while also "
- "serving directory entries via DirPort. It is strongly "
- "suggested that you disable serving directory requests when "
- "system TCP buffer resources are scarce.");
- }
- }
- if (options->V3AuthVoteDelay + options->V3AuthDistDelay >=
- options->V3AuthVotingInterval/2) {
- REJECT("V3AuthVoteDelay plus V3AuthDistDelay must be less than half "
- "V3AuthVotingInterval");
- }
- if (options->V3AuthVoteDelay < MIN_VOTE_SECONDS)
- REJECT("V3AuthVoteDelay is way too low.");
- if (options->V3AuthDistDelay < MIN_DIST_SECONDS)
- REJECT("V3AuthDistDelay is way too low.");
- if (options->V3AuthNIntervalsValid < 2)
- REJECT("V3AuthNIntervalsValid must be at least 2.");
- if (options->V3AuthVotingInterval < MIN_VOTE_INTERVAL) {
- REJECT("V3AuthVotingInterval is insanely low.");
- } else if (options->V3AuthVotingInterval > 24*60*60) {
- REJECT("V3AuthVotingInterval is insanely high.");
- } else if (((24*60*60) % options->V3AuthVotingInterval) != 0) {
- COMPLAIN("V3AuthVotingInterval does not divide evenly into 24 hours.");
- }
- if (rend_config_services(options, 1) < 0)
- REJECT("Failed to configure rendezvous options. See logs for details.");
- /* Parse client-side authorization for hidden services. */
- if (rend_parse_service_authorization(options, 1) < 0)
- REJECT("Failed to configure client authorization for hidden services. "
- "See logs for details.");
- if (parse_virtual_addr_network(options->VirtualAddrNetwork, 1, NULL)<0)
- return -1;
- if (options->PreferTunneledDirConns && !options->TunnelDirConns)
- REJECT("Must set TunnelDirConns if PreferTunneledDirConns is set.");
- if ((options->Socks4Proxy || options->Socks5Proxy) &&
- !options->HttpProxy && !options->PreferTunneledDirConns)
- REJECT("When Socks4Proxy or Socks5Proxy is configured, "
- "PreferTunneledDirConns and TunnelDirConns must both be "
- "set to 1, or HttpProxy must be configured.");
- if (options->AutomapHostsSuffixes) {
- SMARTLIST_FOREACH(options->AutomapHostsSuffixes, char *, suf,
- {
- size_t len = strlen(suf);
- if (len && suf[len-1] == '.')
- suf[len-1] = '\0';
- });
- }
- if (options->TestingTorNetwork && !options->DirServers) {
- REJECT("TestingTorNetwork may only be configured in combination with "
- "a non-default set of DirServers.");
- }
- /*XXXX022 checking for defaults manually like this is a bit fragile.*/
- /* Keep changes to hard-coded values synchronous to man page and default
- * values table. */
- if (options->TestingV3AuthInitialVotingInterval != 30*60 &&
- !options->TestingTorNetwork) {
- REJECT("TestingV3AuthInitialVotingInterval may only be changed in testing "
- "Tor networks!");
- } else if (options->TestingV3AuthInitialVotingInterval < MIN_VOTE_INTERVAL) {
- REJECT("TestingV3AuthInitialVotingInterval is insanely low.");
- } else if (((30*60) % options->TestingV3AuthInitialVotingInterval) != 0) {
- REJECT("TestingV3AuthInitialVotingInterval does not divide evenly into "
- "30 minutes.");
- }
- if (options->TestingV3AuthInitialVoteDelay != 5*60 &&
- !options->TestingTorNetwork) {
- REJECT("TestingV3AuthInitialVoteDelay may only be changed in testing "
- "Tor networks!");
- } else if (options->TestingV3AuthInitialVoteDelay < MIN_VOTE_SECONDS) {
- REJECT("TestingV3AuthInitialVoteDelay is way too low.");
- }
- if (options->TestingV3AuthInitialDistDelay != 5*60 &&
- !options->TestingTorNetwork) {
- REJECT("TestingV3AuthInitialDistDelay may only be changed in testing "
- "Tor networks!");
- } else if (options->TestingV3AuthInitialDistDelay < MIN_DIST_SECONDS) {
- REJECT("TestingV3AuthInitialDistDelay is way too low.");
- }
- if (options->TestingV3AuthInitialVoteDelay +
- options->TestingV3AuthInitialDistDelay >=
- options->TestingV3AuthInitialVotingInterval/2) {
- REJECT("TestingV3AuthInitialVoteDelay plus TestingV3AuthInitialDistDelay "
- "must be less than half TestingV3AuthInitialVotingInterval");
- }
- if (options->TestingAuthDirTimeToLearnReachability != 30*60 &&
- !options->TestingTorNetwork) {
- REJECT("TestingAuthDirTimeToLearnReachability may only be changed in "
- "testing Tor networks!");
- } else if (options->TestingAuthDirTimeToLearnReachability < 0) {
- REJECT("TestingAuthDirTimeToLearnReachability must be non-negative.");
- } else if (options->TestingAuthDirTimeToLearnReachability > 2*60*60) {
- COMPLAIN("TestingAuthDirTimeToLearnReachability is insanely high.");
- }
- if (options->TestingEstimatedDescriptorPropagationTime != 10*60 &&
- !options->TestingTorNetwork) {
- REJECT("TestingEstimatedDescriptorPropagationTime may only be changed in "
- "testing Tor networks!");
- } else if (options->TestingEstimatedDescriptorPropagationTime < 0) {
- REJECT("TestingEstimatedDescriptorPropagationTime must be non-negative.");
- } else if (options->TestingEstimatedDescriptorPropagationTime > 60*60) {
- COMPLAIN("TestingEstimatedDescriptorPropagationTime is insanely high.");
- }
- if (options->TestingTorNetwork) {
- log_warn(LD_CONFIG, "TestingTorNetwork is set. This will make your node "
- "almost unusable in the public Tor network, and is "
- "therefore only advised if you are building a "
- "testing Tor network!");
- }
- if (options->AccelName && !options->HardwareAccel)
- options->HardwareAccel = 1;
- if (options->AccelDir && !options->AccelName)
- REJECT("Can't use hardware crypto accelerator dir without engine name.");
- return 0;
- #undef REJECT
- #undef COMPLAIN
- }
- /** Helper: return true iff s1 and s2 are both NULL, or both non-NULL
- * equal strings. */
- static int
- opt_streq(const char *s1, const char *s2)
- {
- if (!s1 && !s2)
- return 1;
- else if (s1 && s2 && !strcmp(s1,s2))
- return 1;
- else
- return 0;
- }
- /** Check if any of the previous options have changed but aren't allowed to. */
- static int
- options_transition_allowed(or_options_t *old, or_options_t *new_val,
- char **msg)
- {
- if (!old)
- return 0;
- if (!opt_streq(old->PidFile, new_val->PidFile)) {
- *msg = tor_strdup("PidFile is not allowed to change.");
- return -1;
- }
- if (old->RunAsDaemon != new_val->RunAsDaemon) {
- *msg = tor_strdup("While Tor is running, changing RunAsDaemon "
- "is not allowed.");
- return -1;
- }
- if (strcmp(old->DataDirectory,new_val->DataDirectory)!=0) {
- char buf[1024];
- int r = tor_snprintf(buf, sizeof(buf),
- "While Tor is running, changing DataDirectory "
- "(\"%s\"->\"%s\") is not allowed.",
- old->DataDirectory, new_val->DataDirectory);
- *msg = tor_strdup(r >= 0 ? buf : "internal error");
- return -1;
- }
- if (!opt_streq(old->User, new_val->User)) {
- *msg = tor_strdup("While Tor is running, changing User is not allowed.");
- return -1;
- }
- if (!opt_streq(old->Group, new_val->Group)) {
- *msg = tor_strdup("While Tor is running, changing Group is not allowed.");
- return -1;
- }
- if ((old->HardwareAccel != new_val->HardwareAccel)
- || !opt_streq(old->AccelName, new_val->AccelName)
- || !opt_streq(old->AccelDir, new_val->AccelDir)) {
- *msg = tor_strdup("While Tor is running, changing OpenSSL hardware "
- "acceleration engine is not allowed.");
- return -1;
- }
- if (old->TestingTorNetwork != new_val->TestingTorNetwork) {
- *msg = tor_strdup("While Tor is running, changing TestingTorNetwork "
- "is not allowed.");
- return -1;
- }
- if (old->CellStatistics != new_val->CellStatistics ||
- old->DirReqStatistics != new_val->DirReqStatistics ||
- old->EntryStatistics != new_val->EntryStatistics ||
- old->ExitPortStatistics != new_val->ExitPortStatistics) {
- *msg = tor_strdup("While Tor is running, changing either "
- "CellStatistics, DirReqStatistics, EntryStatistics, "
- "or ExitPortStatistics is not allowed.");
- return -1;
- }
- if (old->DisableAllSwap != new_val->DisableAllSwap) {
- *msg = tor_strdup("While Tor is running, changing DisableAllSwap "
- "is not allowed.");
- return -1;
- }
- return 0;
- }
- /** Return 1 if any change from <b>old_options</b> to <b>new_options</b>
- * will require us to rotate the CPU and DNS workers; else return 0. */
- static int
- options_transition_affects_workers(or_options_t *old_options,
- or_options_t *new_options)
- {
- if (!opt_streq(old_options->DataDirectory, new_options->DataDirectory) ||
- old_options->NumCpus != new_options->NumCpus ||
- old_options->ORPort != new_options->ORPort ||
- old_options->ServerDNSSearchDomains !=
- new_options->ServerDNSSearchDomains ||
- old_options->SafeLogging != new_options->SafeLogging ||
- old_options->ClientOnly != new_options->ClientOnly ||
- !config_lines_eq(old_options->Logs, new_options->Logs))
- return 1;
- /* Check whether log options match. */
- /* Nothing that changed matters. */
- return 0;
- }
- /** Return 1 if any change from <b>old_options</b> to <b>new_options</b>
- * will require us to generate a new descriptor; else return 0. */
- static int
- options_transition_affects_descriptor(or_options_t *old_options,
- or_options_t *new_options)
- {
- /* XXX We can be smarter here. If your DirPort isn't being
- * published and you just turned it off, no need to republish. Etc. */
- if (!opt_streq(old_options->DataDirectory, new_options->DataDirectory) ||
- !opt_streq(old_options->Nickname,new_options->Nickname) ||
- !opt_streq(old_options->Address,new_options->Address) ||
- !config_lines_eq(old_options->ExitPolicy,new_options->ExitPolicy) ||
- old_options->ExitPolicyRejectPrivate !=
- new_options->ExitPolicyRejectPrivate ||
- old_options->ORPort != new_options->ORPort ||
- old_options->DirPort != new_options->DirPort ||
- old_options->ClientOnly != new_options->ClientOnly ||
- old_options->NoPublish != new_options->NoPublish ||
- old_options->_PublishServerDescriptor !=
- new_options->_PublishServerDescriptor ||
- get_effective_bwrate(old_options) != get_effective_bwrate(new_options) ||
- get_effective_bwburst(old_options) !=
- get_effective_bwburst(new_options) ||
- !opt_streq(old_options->ContactInfo, new_options->ContactInfo) ||
- !opt_streq(old_options->MyFamily, new_options->MyFamily) ||
- !opt_streq(old_options->AccountingStart, new_options->AccountingStart) ||
- old_options->AccountingMax != new_options->AccountingMax)
- return 1;
- return 0;
- }
- #ifdef MS_WINDOWS
- /** Return the directory on windows where we expect to find our application
- * data. */
- static char *
- get_windows_conf_root(void)
- {
- static int is_set = 0;
- static char path[MAX_PATH+1];
- LPITEMIDLIST idl;
- IMalloc *m;
- HRESULT result;
- if (is_set)
- return path;
- /* Find X:\documents and settings\username\application data\ .
- * We would use SHGetSpecialFolder path, but that wasn't added until IE4.
- */
- #ifdef ENABLE_LOCAL_APPDATA
- #define APPDATA_PATH CSIDL_LOCAL_APPDATA
- #else
- #define APPDATA_PATH CSIDL_APPDATA
- #endif
- if (!SUCCEEDED(SHGetSpecialFolderLocation(NULL, APPDATA_PATH, &idl))) {
- GetCurrentDirectory(MAX_PATH, path);
- is_set = 1;
- log_warn(LD_CONFIG,
- "I couldn't find your application data folder: are you "
- "running an ancient version of Windows 95? Defaulting to \"%s\"",
- path);
- return path;
- }
- /* Convert the path from an "ID List" (whatever that is!) to a path. */
- result = SHGetPathFromIDList(idl, path);
- /* Now we need to free the */
- SHGetMalloc(&m);
- if (m) {
- m->lpVtbl->Free(m, idl);
- m->lpVtbl->Release(m);
- }
- if (!SUCCEEDED(result)) {
- return NULL;
- }
- strlcat(path,"\\tor",MAX_PATH);
- is_set = 1;
- return path;
- }
- #endif
- /** Return the default location for our torrc file. */
- static const char *
- get_default_conf_file(void)
- {
- #ifdef MS_WINDOWS
- static char path[MAX_PATH+1];
- strlcpy(path, get_windows_conf_root(), MAX_PATH);
- strlcat(path,"\\torrc",MAX_PATH);
- return path;
- #else
- return (CONFDIR "/torrc");
- #endif
- }
- /** Verify whether lst is a string containing valid-looking comma-separated
- * nicknames, or NULL. Return 0 on success. Warn and return -1 on failure.
- */
- static int
- check_nickname_list(const char *lst, const char *name, char **msg)
- {
- int r = 0;
- smartlist_t *sl;
- if (!lst)
- return 0;
- sl = smartlist_create();
- smartlist_split_string(sl, lst, ",",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK|SPLIT_STRIP_SPACE, 0);
- SMARTLIST_FOREACH(sl, const char *, s,
- {
- if (!is_legal_nickname_or_hexdigest(s)) {
- char buf[1024];
- int tmp = tor_snprintf(buf, sizeof(buf),
- "Invalid nickname '%s' in %s line", s, name);
- *msg = tor_strdup(tmp >= 0 ? buf : "internal error");
- r = -1;
- break;
- }
- });
- SMARTLIST_FOREACH(sl, char *, s, tor_free(s));
- smartlist_free(sl);
- return r;
- }
- /** Learn config file name from command line arguments, or use the default */
- static char *
- find_torrc_filename(int argc, char **argv,
- int *using_default_torrc, int *ignore_missing_torrc)
- {
- char *fname=NULL;
- int i;
- for (i = 1; i < argc; ++i) {
- if (i < argc-1 && !strcmp(argv[i],"-f")) {
- if (fname) {
- log(LOG_WARN, LD_CONFIG, "Duplicate -f options on command line.");
- tor_free(fname);
- }
- #ifdef MS_WINDOWS
- /* XXX one day we might want to extend expand_filename to work
- * under Windows as well. */
- fname = tor_strdup(argv[i+1]);
- #else
- fname = expand_filename(argv[i+1]);
- #endif
- *using_default_torrc = 0;
- ++i;
- } else if (!strcmp(argv[i],"--ignore-missing-torrc")) {
- *ignore_missing_torrc = 1;
- }
- }
- if (*using_default_torrc) {
- /* didn't find one, try CONFDIR */
- const char *dflt = get_default_conf_file();
- if (dflt && file_status(dflt) == FN_FILE) {
- fname = tor_strdup(dflt);
- } else {
- #ifndef MS_WINDOWS
- char *fn;
- fn = expand_filename("~/.torrc");
- if (fn && file_status(fn) == FN_FILE) {
- fname = fn;
- } else {
- tor_free(fn);
- fname = tor_strdup(dflt);
- }
- #else
- fname = tor_strdup(dflt);
- #endif
- }
- }
- return fname;
- }
- /** Load torrc from disk, setting torrc_fname if successful */
- static char *
- load_torrc_from_disk(int argc, char **argv)
- {
- char *fname=NULL;
- char *cf = NULL;
- int using_default_torrc = 1;
- int ignore_missing_torrc = 0;
- fname = find_torrc_filename(argc, argv,
- &using_default_torrc, &ignore_missing_torrc);
- tor_assert(fname);
- log(LOG_DEBUG, LD_CONFIG, "Opening config file \"%s\"", fname);
- tor_free(torrc_fname);
- torrc_fname = fname;
- /* Open config file */
- if (file_status(fname) != FN_FILE ||
- !(cf = read_file_to_str(fname,0,NULL))) {
- if (using_default_torrc == 1 || ignore_missing_torrc ) {
- log(LOG_NOTICE, LD_CONFIG, "Configuration file \"%s\" not present, "
- "using reasonable defaults.", fname);
- tor_free(fname); /* sets fname to NULL */
- torrc_fname = NULL;
- cf = tor_strdup("");
- } else {
- log(LOG_WARN, LD_CONFIG,
- "Unable to open configuration file \"%s\".", fname);
- goto err;
- }
- }
- return cf;
- err:
- tor_free(fname);
- torrc_fname = NULL;
- return NULL;
- }
- /** Read a configuration file into <b>options</b>, finding the configuration
- * file location based on the command line. After loading the file
- * call options_init_from_string() to load the config.
- * Return 0 if success, -1 if failure. */
- int
- options_init_from_torrc(int argc, char **argv)
- {
- char *cf=NULL;
- int i, retval, command;
- static char **backup_argv;
- static int backup_argc;
- char *command_arg = NULL;
- char *errmsg=NULL;
- if (argv) { /* first time we're called. save command line args */
- backup_argv = argv;
- backup_argc = argc;
- } else { /* we're reloading. need to clean up old options first. */
- argv = backup_argv;
- argc = backup_argc;
- }
- if (argc > 1 && (!strcmp(argv[1], "-h") || !strcmp(argv[1],"--help"))) {
- print_usage();
- exit(0);
- }
- if (argc > 1 && !strcmp(argv[1], "--list-torrc-options")) {
- /* For documenting validating whether we've documented everything. */
- list_torrc_options();
- exit(0);
- }
- if (argc > 1 && (!strcmp(argv[1],"--version"))) {
- printf("Tor version %s.\n",get_version());
- exit(0);
- }
- if (argc > 1 && (!strcmp(argv[1],"--digests"))) {
- printf("Tor version %s.\n",get_version());
- printf("%s", libor_get_digests());
- printf("%s", tor_get_digests());
- exit(0);
- }
- /* Go through command-line variables */
- if (!global_cmdline_options) {
- /* Or we could redo the list every time we pass this place.
- * It does not really matter */
- if (config_get_commandlines(argc, argv, &global_cmdline_options) < 0) {
- goto err;
- }
- }
- command = CMD_RUN_TOR;
- for (i = 1; i < argc; ++i) {
- if (!strcmp(argv[i],"--list-fingerprint")) {
- command = CMD_LIST_FINGERPRINT;
- } else if (!strcmp(argv[i],"--hash-password")) {
- command = CMD_HASH_PASSWORD;
- command_arg = tor_strdup( (i < argc-1) ? argv[i+1] : "");
- ++i;
- } else if (!strcmp(argv[i],"--verify-config")) {
- command = CMD_VERIFY_CONFIG;
- }
- }
- if (command == CMD_HASH_PASSWORD) {
- cf = tor_strdup("");
- } else {
- cf = load_torrc_from_disk(argc, argv);
- if (!cf)
- goto err;
- }
- retval = options_init_from_string(cf, command, command_arg, &errmsg);
- tor_free(cf);
- if (retval < 0)
- goto err;
- return 0;
- err:
- if (errmsg) {
- log(LOG_WARN,LD_CONFIG,"%s", errmsg);
- tor_free(errmsg);
- }
- return -1;
- }
- /** Load the options from the configuration in <b>cf</b>, validate
- * them for consistency and take actions based on them.
- *
- * Return 0 if success, negative on error:
- * * -1 for general errors.
- * * -2 for failure to parse/validate,
- * * -3 for transition not allowed
- * * -4 for error while setting the new options
- */
- setopt_err_t
- options_init_from_string(const char *cf,
- int command, const char *command_arg,
- char **msg)
- {
- or_options_t *oldoptions, *newoptions;
- config_line_t *cl;
- int retval;
- setopt_err_t err = SETOPT_ERR_MISC;
- tor_assert(msg);
- oldoptions = global_options; /* get_options unfortunately asserts if
- this is the first time we run*/
- newoptions = tor_malloc_zero(sizeof(or_options_t));
- newoptions->_magic = OR_OPTIONS_MAGIC;
- options_init(newoptions);
- newoptions->command = command;
- newoptions->command_arg = command_arg;
- /* get config lines, assign them */
- retval = config_get_lines(cf, &cl);
- if (retval < 0) {
- err = SETOPT_ERR_PARSE;
- goto err;
- }
- retval = config_assign(&options_format, newoptions, cl, 0, 0, msg);
- config_free_lines(cl);
- if (retval < 0) {
- err = SETOPT_ERR_PARSE;
- goto err;
- }
- /* Go through command-line variables too */
- retval = config_assign(&options_format, newoptions,
- global_cmdline_options, 0, 0, msg);
- if (retval < 0) {
- err = SETOPT_ERR_PARSE;
- goto err;
- }
- /* If this is a testing network configuration, change defaults
- * for a list of dependent config options, re-initialize newoptions
- * with the new defaults, and assign all options to it second time. */
- if (newoptions->TestingTorNetwork) {
- /* XXXX this is a bit of a kludge. perhaps there's a better way to do
- * this? We could, for example, make the parsing algorithm do two passes
- * over the configuration. If it finds any "suite" options like
- * TestingTorNetwork, it could change the defaults before its second pass.
- * Not urgent so long as this seems to work, but at any sign of trouble,
- * let's clean it up. -NM */
- /* Change defaults. */
- int i;
- for (i = 0; testing_tor_network_defaults[i].name; ++i) {
- config_var_t *new_var = &testing_tor_network_defaults[i];
- config_var_t *old_var =
- config_find_option(&options_format, new_var->name);
- tor_assert(new_var);
- tor_assert(old_var);
- old_var->initvalue = new_var->initvalue;
- }
- /* Clear newoptions and re-initialize them with new defaults. */
- config_free(&options_format, newoptions);
- newoptions = tor_malloc_zero(sizeof(or_options_t));
- newoptions->_magic = OR_OPTIONS_MAGIC;
- options_init(newoptions);
- newoptions->command = command;
- newoptions->command_arg = command_arg;
- /* Assign all options a second time. */
- retval = config_get_lines(cf, &cl);
- if (retval < 0) {
- err = SETOPT_ERR_PARSE;
- goto err;
- }
- retval = config_assign(&options_format, newoptions, cl, 0, 0, msg);
- config_free_lines(cl);
- if (retval < 0) {
- err = SETOPT_ERR_PARSE;
- goto err;
- }
- retval = config_assign(&options_format, newoptions,
- global_cmdline_options, 0, 0, msg);
- if (retval < 0) {
- err = SETOPT_ERR_PARSE;
- goto err;
- }
- }
- /* Validate newoptions */
- if (options_validate(oldoptions, newoptions, 0, msg) < 0) {
- err = SETOPT_ERR_PARSE; /*XXX make this a separate return value.*/
- goto err;
- }
- if (options_transition_allowed(oldoptions, newoptions, msg) < 0) {
- err = SETOPT_ERR_TRANSITION;
- goto err;
- }
- if (set_options(newoptions, msg)) {
- err = SETOPT_ERR_SETTING;
- goto err; /* frees and replaces old options */
- }
- return SETOPT_OK;
- err:
- config_free(&options_format, newoptions);
- if (*msg) {
- int len = (int)strlen(*msg)+256;
- char *newmsg = tor_malloc(len);
- tor_snprintf(newmsg, len, "Failed to parse/validate config: %s", *msg);
- tor_free(*msg);
- *msg = newmsg;
- }
- return err;
- }
- /** Return the location for our configuration file.
- */
- const char *
- get_torrc_fname(void)
- {
- if (torrc_fname)
- return torrc_fname;
- else
- return get_default_conf_file();
- }
- /** Adjust the address map based on the MapAddress elements in the
- * configuration <b>options</b>
- */
- static void
- config_register_addressmaps(or_options_t *options)
- {
- smartlist_t *elts;
- config_line_t *opt;
- char *from, *to;
- addressmap_clear_configured();
- elts = smartlist_create();
- for (opt = options->AddressMap; opt; opt = opt->next) {
- smartlist_split_string(elts, opt->value, NULL,
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 2);
- if (smartlist_len(elts) >= 2) {
- from = smartlist_get(elts,0);
- to = smartlist_get(elts,1);
- if (address_is_invalid_destination(to, 1)) {
- log_warn(LD_CONFIG,
- "Skipping invalid argument '%s' to MapAddress", to);
- } else {
- addressmap_register(from, tor_strdup(to), 0, ADDRMAPSRC_TORRC);
- if (smartlist_len(elts)>2) {
- log_warn(LD_CONFIG,"Ignoring extra arguments to MapAddress.");
- }
- }
- } else {
- log_warn(LD_CONFIG,"MapAddress '%s' has too few arguments. Ignoring.",
- opt->value);
- }
- SMARTLIST_FOREACH(elts, char*, cp, tor_free(cp));
- smartlist_clear(elts);
- }
- smartlist_free(elts);
- }
- /**
- * Initialize the logs based on the configuration file.
- */
- static int
- options_init_logs(or_options_t *options, int validate_only)
- {
- config_line_t *opt;
- int ok;
- smartlist_t *elts;
- int daemon =
- #ifdef MS_WINDOWS
- 0;
- #else
- options->RunAsDaemon;
- #endif
- ok = 1;
- elts = smartlist_create();
- for (opt = options->Logs; opt; opt = opt->next) {
- log_severity_list_t *severity;
- const char *cfg = opt->value;
- severity = tor_malloc_zero(sizeof(log_severity_list_t));
- if (parse_log_severity_config(&cfg, severity) < 0) {
- log_warn(LD_CONFIG, "Couldn't parse log levels in Log option 'Log %s'",
- opt->value);
- ok = 0; goto cleanup;
- }
- smartlist_split_string(elts, cfg, NULL,
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 2);
- if (smartlist_len(elts) == 0)
- smartlist_add(elts, tor_strdup("stdout"));
- if (smartlist_len(elts) == 1 &&
- (!strcasecmp(smartlist_get(elts,0), "stdout") ||
- !strcasecmp(smartlist_get(elts,0), "stderr"))) {
- int err = smartlist_len(elts) &&
- !strcasecmp(smartlist_get(elts,0), "stderr");
- if (!validate_only) {
- if (daemon) {
- log_warn(LD_CONFIG,
- "Can't log to %s with RunAsDaemon set; skipping stdout",
- err?"stderr":"stdout");
- } else {
- add_stream_log(severity, err?"<stderr>":"<stdout>",
- fileno(err?stderr:stdout));
- }
- }
- goto cleanup;
- }
- if (smartlist_len(elts) == 1 &&
- !strcasecmp(smartlist_get(elts,0), "syslog")) {
- #ifdef HAVE_SYSLOG_H
- if (!validate_only) {
- add_syslog_log(severity);
- }
- #else
- log_warn(LD_CONFIG, "Syslog is not supported on this system. Sorry.");
- #endif
- goto cleanup;
- }
- if (smartlist_len(elts) == 2 &&
- !strcasecmp(smartlist_get(elts,0), "file")) {
- if (!validate_only) {
- if (add_file_log(severity, smartlist_get(elts, 1)) < 0) {
- log_warn(LD_CONFIG, "Couldn't open file for 'Log %s': %s",
- opt->value, strerror(errno));
- ok = 0;
- }
- }
- goto cleanup;
- }
- log_warn(LD_CONFIG, "Bad syntax on file Log option 'Log %s'",
- opt->value);
- ok = 0; goto cleanup;
- cleanup:
- SMARTLIST_FOREACH(elts, char*, cp, tor_free(cp));
- smartlist_clear(elts);
- tor_free(severity);
- }
- smartlist_free(elts);
- return ok?0:-1;
- }
- /** Read the contents of a Bridge line from <b>line</b>. Return 0
- * if the line is well-formed, and -1 if it isn't. If
- * <b>validate_only</b> is 0, and the line is well-formed, then add
- * the bridge described in the line to our internal bridge list. */
- static int
- parse_bridge_line(const char *line, int validate_only)
- {
- smartlist_t *items = NULL;
- int r;
- char *addrport=NULL, *fingerprint=NULL;
- tor_addr_t addr;
- uint16_t port = 0;
- char digest[DIGEST_LEN];
- items = smartlist_create();
- smartlist_split_string(items, line, NULL,
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, -1);
- if (smartlist_len(items) < 1) {
- log_warn(LD_CONFIG, "Too few arguments to Bridge line.");
- goto err;
- }
- addrport = smartlist_get(items, 0);
- smartlist_del_keeporder(items, 0);
- if (tor_addr_port_parse(addrport, &addr, &port)<0) {
- log_warn(LD_CONFIG, "Error parsing Bridge address '%s'", addrport);
- goto err;
- }
- if (!port) {
- log_info(LD_CONFIG,
- "Bridge address '%s' has no port; using default port 443.",
- addrport);
- port = 443;
- }
- if (smartlist_len(items)) {
- fingerprint = smartlist_join_strings(items, "", 0, NULL);
- if (strlen(fingerprint) != HEX_DIGEST_LEN) {
- log_warn(LD_CONFIG, "Key digest for Bridge is wrong length.");
- goto err;
- }
- if (base16_decode(digest, DIGEST_LEN, fingerprint, HEX_DIGEST_LEN)<0) {
- log_warn(LD_CONFIG, "Unable to decode Bridge key digest.");
- goto err;
- }
- }
- if (!validate_only) {
- log_debug(LD_DIR, "Bridge at %s:%d (%s)", fmt_addr(&addr),
- (int)port,
- fingerprint ? fingerprint : "no key listed");
- bridge_add_from_config(&addr, port, fingerprint ? digest : NULL);
- }
- r = 0;
- goto done;
- err:
- r = -1;
- done:
- SMARTLIST_FOREACH(items, char*, s, tor_free(s));
- smartlist_free(items);
- tor_free(addrport);
- tor_free(fingerprint);
- return r;
- }
- /** Read the contents of a DirServer line from <b>line</b>. If
- * <b>validate_only</b> is 0, and the line is well-formed, and it
- * shares any bits with <b>required_type</b> or <b>required_type</b>
- * is 0, then add the dirserver described in the line (minus whatever
- * bits it's missing) as a valid authority. Return 0 on success,
- * or -1 if the line isn't well-formed or if we can't add it. */
- static int
- parse_dir_server_line(const char *line, authority_type_t required_type,
- int validate_only)
- {
- smartlist_t *items = NULL;
- int r;
- char *addrport=NULL, *address=NULL, *nickname=NULL, *fingerprint=NULL;
- uint16_t dir_port = 0, or_port = 0;
- char digest[DIGEST_LEN];
- char v3_digest[DIGEST_LEN];
- authority_type_t type = V2_AUTHORITY;
- int is_not_hidserv_authority = 0, is_not_v2_authority = 0;
- items = smartlist_create();
- smartlist_split_string(items, line, NULL,
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, -1);
- if (smartlist_len(items) < 1) {
- log_warn(LD_CONFIG, "No arguments on DirServer line.");
- goto err;
- }
- if (is_legal_nickname(smartlist_get(items, 0))) {
- nickname = smartlist_get(items, 0);
- smartlist_del_keeporder(items, 0);
- }
- while (smartlist_len(items)) {
- char *flag = smartlist_get(items, 0);
- if (TOR_ISDIGIT(flag[0]))
- break;
- if (!strcasecmp(flag, "v1")) {
- type |= (V1_AUTHORITY | HIDSERV_AUTHORITY);
- } else if (!strcasecmp(flag, "hs")) {
- type |= HIDSERV_AUTHORITY;
- } else if (!strcasecmp(flag, "no-hs")) {
- is_not_hidserv_authority = 1;
- } else if (!strcasecmp(flag, "bridge")) {
- type |= BRIDGE_AUTHORITY;
- } else if (!strcasecmp(flag, "no-v2")) {
- is_not_v2_authority = 1;
- } else if (!strcasecmpstart(flag, "orport=")) {
- int ok;
- char *portstring = flag + strlen("orport=");
- or_port = (uint16_t) tor_parse_long(portstring, 10, 1, 65535, &ok, NULL);
- if (!ok)
- log_warn(LD_CONFIG, "Invalid orport '%s' on DirServer line.",
- portstring);
- } else if (!strcasecmpstart(flag, "v3ident=")) {
- char *idstr = flag + strlen("v3ident=");
- if (strlen(idstr) != HEX_DIGEST_LEN ||
- base16_decode(v3_digest, DIGEST_LEN, idstr, HEX_DIGEST_LEN)<0) {
- log_warn(LD_CONFIG, "Bad v3 identity digest '%s' on DirServer line",
- flag);
- } else {
- type |= V3_AUTHORITY;
- }
- } else {
- log_warn(LD_CONFIG, "Unrecognized flag '%s' on DirServer line",
- flag);
- }
- tor_free(flag);
- smartlist_del_keeporder(items, 0);
- }
- if (is_not_hidserv_authority)
- type &= ~HIDSERV_AUTHORITY;
- if (is_not_v2_authority)
- type &= ~V2_AUTHORITY;
- if (smartlist_len(items) < 2) {
- log_warn(LD_CONFIG, "Too few arguments to DirServer line.");
- goto err;
- }
- addrport = smartlist_get(items, 0);
- smartlist_del_keeporder(items, 0);
- if (parse_addr_port(LOG_WARN, addrport, &address, NULL, &dir_port)<0) {
- log_warn(LD_CONFIG, "Error parsing DirServer address '%s'", addrport);
- goto err;
- }
- if (!dir_port) {
- log_warn(LD_CONFIG, "Missing port in DirServer address '%s'",addrport);
- goto err;
- }
- fingerprint = smartlist_join_strings(items, "", 0, NULL);
- if (strlen(fingerprint) != HEX_DIGEST_LEN) {
- log_warn(LD_CONFIG, "Key digest for DirServer is wrong length %d.",
- (int)strlen(fingerprint));
- goto err;
- }
- if (!strcmp(fingerprint, "E623F7625FBE0C87820F11EC5F6D5377ED816294")) {
- /* a known bad fingerprint. refuse to use it. We can remove this
- * clause once Tor 0.1.2.17 is obsolete. */
- log_warn(LD_CONFIG, "Dangerous dirserver line. To correct, erase your "
- "torrc file (%s), or reinstall Tor and use the default torrc.",
- get_torrc_fname());
- goto err;
- }
- if (base16_decode(digest, DIGEST_LEN, fingerprint, HEX_DIGEST_LEN)<0) {
- log_warn(LD_CONFIG, "Unable to decode DirServer key digest.");
- goto err;
- }
- if (!validate_only && (!required_type || required_type & type)) {
- if (required_type)
- type &= required_type; /* pare down what we think of them as an
- * authority for. */
- log_debug(LD_DIR, "Trusted %d dirserver at %s:%d (%s)", (int)type,
- address, (int)dir_port, (char*)smartlist_get(items,0));
- if (!add_trusted_dir_server(nickname, address, dir_port, or_port,
- digest, v3_digest, type))
- goto err;
- }
- r = 0;
- goto done;
- err:
- r = -1;
- done:
- SMARTLIST_FOREACH(items, char*, s, tor_free(s));
- smartlist_free(items);
- tor_free(addrport);
- tor_free(address);
- tor_free(nickname);
- tor_free(fingerprint);
- return r;
- }
- /** Adjust the value of options->DataDirectory, or fill it in if it's
- * absent. Return 0 on success, -1 on failure. */
- static int
- normalize_data_directory(or_options_t *options)
- {
- #ifdef MS_WINDOWS
- char *p;
- if (options->DataDirectory)
- return 0; /* all set */
- p = tor_malloc(MAX_PATH);
- strlcpy(p,get_windows_conf_root(),MAX_PATH);
- options->DataDirectory = p;
- return 0;
- #else
- const char *d = options->DataDirectory;
- if (!d)
- d = "~/.tor";
- if (strncmp(d,"~/",2) == 0) {
- char *fn = expand_filename(d);
- if (!fn) {
- log_warn(LD_CONFIG,"Failed to expand filename \"%s\".", d);
- return -1;
- }
- if (!options->DataDirectory && !strcmp(fn,"/.tor")) {
- /* If our homedir is /, we probably don't want to use it. */
- /* Default to LOCALSTATEDIR/tor which is probably closer to what we
- * want. */
- log_warn(LD_CONFIG,
- "Default DataDirectory is \"~/.tor\". This expands to "
- "\"%s\", which is probably not what you want. Using "
- "\"%s"PATH_SEPARATOR"tor\" instead", fn, LOCALSTATEDIR);
- tor_free(fn);
- fn = tor_strdup(LOCALSTATEDIR PATH_SEPARATOR "tor");
- }
- tor_free(options->DataDirectory);
- options->DataDirectory = fn;
- }
- return 0;
- #endif
- }
- /** Check and normalize the value of options->DataDirectory; return 0 if it
- * is sane, -1 otherwise. */
- static int
- validate_data_directory(or_options_t *options)
- {
- if (normalize_data_directory(options) < 0)
- return -1;
- tor_assert(options->DataDirectory);
- if (strlen(options->DataDirectory) > (512-128)) {
- log_warn(LD_CONFIG, "DataDirectory is too long.");
- return -1;
- }
- return 0;
- }
- /** This string must remain the same forevermore. It is how we
- * recognize that the torrc file doesn't need to be backed up. */
- #define GENERATED_FILE_PREFIX "# This file was generated by Tor; " \
- "if you edit it, comments will not be preserved"
- /** This string can change; it tries to give the reader an idea
- * that editing this file by hand is not a good plan. */
- #define GENERATED_FILE_COMMENT "# The old torrc file was renamed " \
- "to torrc.orig.1 or similar, and Tor will ignore it"
- /** Save a configuration file for the configuration in <b>options</b>
- * into the file <b>fname</b>. If the file already exists, and
- * doesn't begin with GENERATED_FILE_PREFIX, rename it. Otherwise
- * replace it. Return 0 on success, -1 on failure. */
- static int
- write_configuration_file(const char *fname, or_options_t *options)
- {
- char *old_val=NULL, *new_val=NULL, *new_conf=NULL;
- int rename_old = 0, r;
- size_t len;
- tor_assert(fname);
- switch (file_status(fname)) {
- case FN_FILE:
- old_val = read_file_to_str(fname, 0, NULL);
- if (strcmpstart(old_val, GENERATED_FILE_PREFIX)) {
- rename_old = 1;
- }
- tor_free(old_val);
- break;
- case FN_NOENT:
- break;
- case FN_ERROR:
- case FN_DIR:
- default:
- log_warn(LD_CONFIG,
- "Config file \"%s\" is not a file? Failing.", fname);
- return -1;
- }
- if (!(new_conf = options_dump(options, 1))) {
- log_warn(LD_BUG, "Couldn't get configuration string");
- goto err;
- }
- len = strlen(new_conf)+256;
- new_val = tor_malloc(len);
- tor_snprintf(new_val, len, "%s\n%s\n\n%s",
- GENERATED_FILE_PREFIX, GENERATED_FILE_COMMENT, new_conf);
- if (rename_old) {
- int i = 1;
- size_t fn_tmp_len = strlen(fname)+32;
- char *fn_tmp;
- tor_assert(fn_tmp_len > strlen(fname)); /*check for overflow*/
- fn_tmp = tor_malloc(fn_tmp_len);
- while (1) {
- if (tor_snprintf(fn_tmp, fn_tmp_len, "%s.orig.%d", fname, i)<0) {
- log_warn(LD_BUG, "tor_snprintf failed inexplicably");
- tor_free(fn_tmp);
- goto err;
- }
- if (file_status(fn_tmp) == FN_NOENT)
- break;
- ++i;
- }
- log_notice(LD_CONFIG, "Renaming old configuration file to \"%s\"", fn_tmp);
- if (rename(fname, fn_tmp) < 0) {
- log_warn(LD_FS,
- "Couldn't rename configuration file \"%s\" to \"%s\": %s",
- fname, fn_tmp, strerror(errno));
- tor_free(fn_tmp);
- goto err;
- }
- tor_free(fn_tmp);
- }
- if (write_str_to_file(fname, new_val, 0) < 0)
- goto err;
- r = 0;
- goto done;
- err:
- r = -1;
- done:
- tor_free(new_val);
- tor_free(new_conf);
- return r;
- }
- /**
- * Save the current configuration file value to disk. Return 0 on
- * success, -1 on failure.
- **/
- int
- options_save_current(void)
- {
- if (torrc_fname) {
- /* This fails if we can't write to our configuration file.
- *
- * If we try falling back to datadirectory or something, we have a better
- * chance of saving the configuration, but a better chance of doing
- * something the user never expected. Let's just warn instead. */
- return write_configuration_file(torrc_fname, get_options());
- }
- return write_configuration_file(get_default_conf_file(), get_options());
- }
- /** Mapping from a unit name to a multiplier for converting that unit into a
- * base unit. */
- struct unit_table_t {
- const char *unit;
- uint64_t multiplier;
- };
- /** Table to map the names of memory units to the number of bytes they
- * contain. */
- static struct unit_table_t memory_units[] = {
- { "", 1 },
- { "b", 1<< 0 },
- { "byte", 1<< 0 },
- { "bytes", 1<< 0 },
- { "kb", 1<<10 },
- { "kbyte", 1<<10 },
- { "kbytes", 1<<10 },
- { "kilobyte", 1<<10 },
- { "kilobytes", 1<<10 },
- { "m", 1<<20 },
- { "mb", 1<<20 },
- { "mbyte", 1<<20 },
- { "mbytes", 1<<20 },
- { "megabyte", 1<<20 },
- { "megabytes", 1<<20 },
- { "gb", 1<<30 },
- { "gbyte", 1<<30 },
- { "gbytes", 1<<30 },
- { "gigabyte", 1<<30 },
- { "gigabytes", 1<<30 },
- { "tb", U64_LITERAL(1)<<40 },
- { "terabyte", U64_LITERAL(1)<<40 },
- { "terabytes", U64_LITERAL(1)<<40 },
- { NULL, 0 },
- };
- /** Table to map the names of time units to the number of seconds they
- * contain. */
- static struct unit_table_t time_units[] = {
- { "", 1 },
- { "second", 1 },
- { "seconds", 1 },
- { "minute", 60 },
- { "minutes", 60 },
- { "hour", 60*60 },
- { "hours", 60*60 },
- { "day", 24*60*60 },
- { "days", 24*60*60 },
- { "week", 7*24*60*60 },
- { "weeks", 7*24*60*60 },
- { NULL, 0 },
- };
- /** Parse a string <b>val</b> containing a number, zero or more
- * spaces, and an optional unit string. If the unit appears in the
- * table <b>u</b>, then multiply the number by the unit multiplier.
- * On success, set *<b>ok</b> to 1 and return this product.
- * Otherwise, set *<b>ok</b> to 0.
- */
- static uint64_t
- config_parse_units(const char *val, struct unit_table_t *u, int *ok)
- {
- uint64_t v = 0;
- double d = 0;
- int use_float = 0;
- char *cp;
- tor_assert(ok);
- v = tor_parse_uint64(val, 10, 0, UINT64_MAX, ok, &cp);
- if (!*ok || (cp && *cp == '.')) {
- d = tor_parse_double(val, 0, UINT64_MAX, ok, &cp);
- if (!*ok)
- goto done;
- use_float = 1;
- }
- if (!cp) {
- *ok = 1;
- v = use_float ? DBL_TO_U64(d) : v;
- goto done;
- }
- cp = (char*) eat_whitespace(cp);
- for ( ;u->unit;++u) {
- if (!strcasecmp(u->unit, cp)) {
- if (use_float)
- v = u->multiplier * d;
- else
- v *= u->multiplier;
- *ok = 1;
- goto done;
- }
- }
- log_warn(LD_CONFIG, "Unknown unit '%s'.", cp);
- *ok = 0;
- done:
- if (*ok)
- return v;
- else
- return 0;
- }
- /** Parse a string in the format "number unit", where unit is a unit of
- * information (byte, KB, M, etc). On success, set *<b>ok</b> to true
- * and return the number of bytes specified. Otherwise, set
- * *<b>ok</b> to false and return 0. */
- static uint64_t
- config_parse_memunit(const char *s, int *ok)
- {
- uint64_t u = config_parse_units(s, memory_units, ok);
- return u;
- }
- /** Parse a string in the format "number unit", where unit is a unit of time.
- * On success, set *<b>ok</b> to true and return the number of seconds in
- * the provided interval. Otherwise, set *<b>ok</b> to 0 and return -1.
- */
- static int
- config_parse_interval(const char *s, int *ok)
- {
- uint64_t r;
- r = config_parse_units(s, time_units, ok);
- if (!ok)
- return -1;
- if (r > INT_MAX) {
- log_warn(LD_CONFIG, "Interval '%s' is too long", s);
- *ok = 0;
- return -1;
- }
- return (int)r;
- }
- /**
- * Initialize the libevent library.
- */
- static void
- init_libevent(void)
- {
- const char *badness=NULL;
- configure_libevent_logging();
- /* If the kernel complains that some method (say, epoll) doesn't
- * exist, we don't care about it, since libevent will cope.
- */
- suppress_libevent_log_msg("Function not implemented");
- tor_check_libevent_header_compatibility();
- tor_libevent_initialize();
- suppress_libevent_log_msg(NULL);
- tor_check_libevent_version(tor_libevent_get_method(),
- get_options()->ORPort != 0,
- &badness);
- if (badness) {
- const char *v = tor_libevent_get_version_str();
- const char *m = tor_libevent_get_method();
- control_event_general_status(LOG_WARN,
- "BAD_LIBEVENT VERSION=%s METHOD=%s BADNESS=%s RECOVERED=NO",
- v, m, badness);
- }
- }
- /** Return the persistent state struct for this Tor. */
- or_state_t *
- get_or_state(void)
- {
- tor_assert(global_state);
- return global_state;
- }
- /** Return a newly allocated string holding a filename relative to the data
- * directory. If <b>sub1</b> is present, it is the first path component after
- * the data directory. If <b>sub2</b> is also present, it is the second path
- * component after the data directory. If <b>suffix</b> is present, it
- * is appended to the filename.
- *
- * Examples:
- * get_datadir_fname2_suffix("a", NULL, NULL) -> $DATADIR/a
- * get_datadir_fname2_suffix("a", NULL, ".tmp") -> $DATADIR/a.tmp
- * get_datadir_fname2_suffix("a", "b", ".tmp") -> $DATADIR/a/b/.tmp
- * get_datadir_fname2_suffix("a", "b", NULL) -> $DATADIR/a/b
- *
- * Note: Consider using the get_datadir_fname* macros in or.h.
- */
- char *
- options_get_datadir_fname2_suffix(or_options_t *options,
- const char *sub1, const char *sub2,
- const char *suffix)
- {
- char *fname = NULL;
- size_t len;
- tor_assert(options);
- tor_assert(options->DataDirectory);
- tor_assert(sub1 || !sub2); /* If sub2 is present, sub1 must be present. */
- len = strlen(options->DataDirectory);
- if (sub1) {
- len += strlen(sub1)+1;
- if (sub2)
- len += strlen(sub2)+1;
- }
- if (suffix)
- len += strlen(suffix);
- len++;
- fname = tor_malloc(len);
- if (sub1) {
- if (sub2) {
- tor_snprintf(fname, len, "%s"PATH_SEPARATOR"%s"PATH_SEPARATOR"%s",
- options->DataDirectory, sub1, sub2);
- } else {
- tor_snprintf(fname, len, "%s"PATH_SEPARATOR"%s",
- options->DataDirectory, sub1);
- }
- } else {
- strlcpy(fname, options->DataDirectory, len);
- }
- if (suffix)
- strlcat(fname, suffix, len);
- return fname;
- }
- /** Return 0 if every setting in <b>state</b> is reasonable, and a
- * permissible transition from <b>old_state</b>. Else warn and return -1.
- * Should have no side effects, except for normalizing the contents of
- * <b>state</b>.
- */
- /* XXX from_setconf is here because of bug 238 */
- static int
- or_state_validate(or_state_t *old_state, or_state_t *state,
- int from_setconf, char **msg)
- {
- /* We don't use these; only options do. Still, we need to match that
- * signature. */
- (void) from_setconf;
- (void) old_state;
- if (entry_guards_parse_state(state, 0, msg)<0)
- return -1;
- return 0;
- }
- /** Replace the current persistent state with <b>new_state</b> */
- static void
- or_state_set(or_state_t *new_state)
- {
- char *err = NULL;
- tor_assert(new_state);
- config_free(&state_format, global_state);
- global_state = new_state;
- if (entry_guards_parse_state(global_state, 1, &err)<0) {
- log_warn(LD_GENERAL,"%s",err);
- tor_free(err);
- }
- if (rep_hist_load_state(global_state, &err)<0) {
- log_warn(LD_GENERAL,"Unparseable bandwidth history state: %s",err);
- tor_free(err);
- }
- if (circuit_build_times_parse_state(&circ_times, global_state, &err) < 0) {
- log_warn(LD_GENERAL,"%s",err);
- tor_free(err);
- }
- }
- /** Reload the persistent state from disk, generating a new state as needed.
- * Return 0 on success, less than 0 on failure.
- */
- static int
- or_state_load(void)
- {
- or_state_t *new_state = NULL;
- char *contents = NULL, *fname;
- char *errmsg = NULL;
- int r = -1, badstate = 0;
- fname = get_datadir_fname("state");
- switch (file_status(fname)) {
- case FN_FILE:
- if (!(contents = read_file_to_str(fname, 0, NULL))) {
- log_warn(LD_FS, "Unable to read state file \"%s\"", fname);
- goto done;
- }
- break;
- case FN_NOENT:
- break;
- case FN_ERROR:
- case FN_DIR:
- default:
- log_warn(LD_GENERAL,"State file \"%s\" is not a file? Failing.", fname);
- goto done;
- }
- new_state = tor_malloc_zero(sizeof(or_state_t));
- new_state->_magic = OR_STATE_MAGIC;
- config_init(&state_format, new_state);
- if (contents) {
- config_line_t *lines=NULL;
- int assign_retval;
- if (config_get_lines(contents, &lines)<0)
- goto done;
- assign_retval = config_assign(&state_format, new_state,
- lines, 0, 0, &errmsg);
- config_free_lines(lines);
- if (assign_retval<0)
- badstate = 1;
- if (errmsg) {
- log_warn(LD_GENERAL, "%s", errmsg);
- tor_free(errmsg);
- }
- }
- if (!badstate && or_state_validate(NULL, new_state, 1, &errmsg) < 0)
- badstate = 1;
- if (errmsg) {
- log_warn(LD_GENERAL, "%s", errmsg);
- tor_free(errmsg);
- }
- if (badstate && !contents) {
- log_warn(LD_BUG, "Uh oh. We couldn't even validate our own default state."
- " This is a bug in Tor.");
- goto done;
- } else if (badstate && contents) {
- int i;
- file_status_t status;
- size_t len = strlen(fname)+16;
- char *fname2 = tor_malloc(len);
- for (i = 0; i < 100; ++i) {
- tor_snprintf(fname2, len, "%s.%d", fname, i);
- status = file_status(fname2);
- if (status == FN_NOENT)
- break;
- }
- if (i == 100) {
- log_warn(LD_BUG, "Unable to parse state in \"%s\"; too many saved bad "
- "state files to move aside. Discarding the old state file.",
- fname);
- unlink(fname);
- } else {
- log_warn(LD_BUG, "Unable to parse state in \"%s\". Moving it aside "
- "to \"%s\". This could be a bug in Tor; please tell "
- "the developers.", fname, fname2);
- if (rename(fname, fname2) < 0) {
- log_warn(LD_BUG, "Weirdly, I couldn't even move the state aside. The "
- "OS gave an error of %s", strerror(errno));
- }
- }
- tor_free(fname2);
- tor_free(contents);
- config_free(&state_format, new_state);
- new_state = tor_malloc_zero(sizeof(or_state_t));
- new_state->_magic = OR_STATE_MAGIC;
- config_init(&state_format, new_state);
- } else if (contents) {
- log_info(LD_GENERAL, "Loaded state from \"%s\"", fname);
- } else {
- log_info(LD_GENERAL, "Initialized state");
- }
- or_state_set(new_state);
- new_state = NULL;
- if (!contents) {
- global_state->next_write = 0;
- or_state_save(time(NULL));
- }
- r = 0;
- done:
- tor_free(fname);
- tor_free(contents);
- if (new_state)
- config_free(&state_format, new_state);
- return r;
- }
- /** Write the persistent state to disk. Return 0 for success, <0 on failure. */
- int
- or_state_save(time_t now)
- {
- char *state, *contents;
- char tbuf[ISO_TIME_LEN+1];
- size_t len;
- char *fname;
- tor_assert(global_state);
- if (global_state->next_write > now)
- return 0;
- /* Call everything else that might dirty the state even more, in order
- * to avoid redundant writes. */
- entry_guards_update_state(global_state);
- rep_hist_update_state(global_state);
- circuit_build_times_update_state(&circ_times, global_state);
- if (accounting_is_enabled(get_options()))
- accounting_run_housekeeping(now);
- global_state->LastWritten = time(NULL);
- tor_free(global_state->TorVersion);
- len = strlen(get_version())+8;
- global_state->TorVersion = tor_malloc(len);
- tor_snprintf(global_state->TorVersion, len, "Tor %s", get_version());
- state = config_dump(&state_format, global_state, 1, 0);
- len = strlen(state)+256;
- contents = tor_malloc(len);
- format_local_iso_time(tbuf, time(NULL));
- tor_snprintf(contents, len,
- "# Tor state file last generated on %s local time\n"
- "# Other times below are in GMT\n"
- "# You *do not* need to edit this file.\n\n%s",
- tbuf, state);
- tor_free(state);
- fname = get_datadir_fname("state");
- if (write_str_to_file(fname, contents, 0)<0) {
- log_warn(LD_FS, "Unable to write state to file \"%s\"", fname);
- tor_free(fname);
- tor_free(contents);
- return -1;
- }
- log_info(LD_GENERAL, "Saved state to \"%s\"", fname);
- tor_free(fname);
- tor_free(contents);
- global_state->next_write = TIME_MAX;
- return 0;
- }
- /** Given a file name check to see whether the file exists but has not been
- * modified for a very long time. If so, remove it. */
- void
- remove_file_if_very_old(const char *fname, time_t now)
- {
- #define VERY_OLD_FILE_AGE (28*24*60*60)
- struct stat st;
- if (stat(fname, &st)==0 && st.st_mtime < now-VERY_OLD_FILE_AGE) {
- char buf[ISO_TIME_LEN+1];
- format_local_iso_time(buf, st.st_mtime);
- log_notice(LD_GENERAL, "Obsolete file %s hasn't been modified since %s. "
- "Removing it.", fname, buf);
- unlink(fname);
- }
- }
- /** Helper to implement GETINFO functions about configuration variables (not
- * their values). Given a "config/names" question, set *<b>answer</b> to a
- * new string describing the supported configuration variables and their
- * types. */
- int
- getinfo_helper_config(control_connection_t *conn,
- const char *question, char **answer)
- {
- (void) conn;
- if (!strcmp(question, "config/names")) {
- smartlist_t *sl = smartlist_create();
- int i;
- for (i = 0; _option_vars[i].name; ++i) {
- config_var_t *var = &_option_vars[i];
- const char *type;
- char *line;
- size_t len;
- switch (var->type) {
- case CONFIG_TYPE_STRING: type = "String"; break;
- case CONFIG_TYPE_FILENAME: type = "Filename"; break;
- case CONFIG_TYPE_UINT: type = "Integer"; break;
- case CONFIG_TYPE_INTERVAL: type = "TimeInterval"; break;
- case CONFIG_TYPE_MEMUNIT: type = "DataSize"; break;
- case CONFIG_TYPE_DOUBLE: type = "Float"; break;
- case CONFIG_TYPE_BOOL: type = "Boolean"; break;
- case CONFIG_TYPE_ISOTIME: type = "Time"; break;
- case CONFIG_TYPE_ROUTERSET: type = "RouterList"; break;
- case CONFIG_TYPE_CSV: type = "CommaList"; break;
- case CONFIG_TYPE_LINELIST: type = "LineList"; break;
- case CONFIG_TYPE_LINELIST_S: type = "Dependant"; break;
- case CONFIG_TYPE_LINELIST_V: type = "Virtual"; break;
- default:
- case CONFIG_TYPE_OBSOLETE:
- type = NULL; break;
- }
- if (!type)
- continue;
- len = strlen(var->name)+strlen(type)+16;
- line = tor_malloc(len);
- tor_snprintf(line, len, "%s %s\n",var->name,type);
- smartlist_add(sl, line);
- }
- *answer = smartlist_join_strings(sl, "", 0, NULL);
- SMARTLIST_FOREACH(sl, char *, c, tor_free(c));
- smartlist_free(sl);
- }
- return 0;
- }
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