/* * IRC - Internet Relay Chat, ircd/features.c * Copyright (C) 2000 Kevin L. Mitchell * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 1, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /** @file * @brief Implementation of configurable feature support. * @version $Id: ircd_features.c 1922 2010-01-02 04:00:13Z entrope $ */ #include "config.h" #include "ircd_features.h" #include "channel.h" /* list_set_default */ #include "class.h" #include "client.h" #include "hash.h" #include "ircd.h" #include "ircd_alloc.h" #include "ircd_geoip.h" #include "ircd_log.h" #include "ircd_reply.h" #include "ircd_snprintf.h" #include "ircd_string.h" #include "match.h" #include "motd.h" #include "msg.h" #include "numeric.h" #include "numnicks.h" #include "random.h" /* random_seed_set */ #include "s_bsd.h" #include "s_debug.h" #include "s_misc.h" #include "s_stats.h" #include "s_user.h" #include "send.h" #include "struct.h" #include "sys.h" /* FALSE bleah */ #include "whowas.h" /* whowas_realloc */ /* #include -- Now using assert in ircd_log.h */ #include #include struct Client his; /** List of log output types that can be set */ static struct LogTypes { char *type; /**< Settable name. */ int (*set)(const char *, const char *); /**< Function to set the value. */ char *(*get)(const char *); /**< Function to get the value. */ } logTypes[] = { { "FILE", log_set_file, log_get_file }, { "FACILITY", log_set_facility, log_get_facility }, { "SNOMASK", log_set_snomask, log_get_snomask }, { "LEVEL", log_set_level, log_get_level }, { 0, 0, 0 } }; /** Look up a struct LogType given the type string. * @param[in] from &Client requesting type, or NULL. * @param[in] type Name of log type to find. * @return Pointer to the found LogType, or NULL if none was found. */ static struct LogTypes * feature_log_desc(struct Client* from, const char *type) { int i; assert(0 != type); for (i = 0; logTypes[i].type; i++) /* find appropriate descriptor */ if (!ircd_strcmp(type, logTypes[i].type)) return &logTypes[i]; Debug((DEBUG_ERROR, "Unknown log feature type \"%s\"", type)); if (from) /* send an error; if from is NULL, called from conf parser */ send_reply(from, ERR_BADLOGTYPE, type); else log_write(LS_CONFIG, L_ERROR, 0, "Unknown log feature type \"%s\"", type); return 0; /* not found */ } /** Set the value of a log output type for a log subsystem. * @param[in] from &Client trying to set the log type, or NULL. * @param[in] fields Array of parameters to set. * @param[in] count Number of parameters in \a fields. * @return -1 to clear the mark, 0 to leave the mask alone, 1 to set the mask. */ static int feature_log_set(struct Client* from, const char* const* fields, int count) { struct LogTypes *desc; char *subsys; if (count < 2) { /* set default facility */ if (log_set_default(count < 1 ? 0 : fields[0])) { assert(count >= 1); /* should always accept default */ if (from) /* send an error */ send_reply(from, ERR_BADLOGVALUE, fields[0]); else log_write(LS_CONFIG, L_ERROR, 0, "Bad value \"%s\" for default facility", fields[0]); } else return count < 1 ? -1 : 1; /* tell feature to set or clear mark */ } else if (!(subsys = log_canon(fields[0]))) { /* no such subsystem */ if (from) /* send an error */ send_reply(from, ERR_BADLOGSYS, fields[0]); else log_write(LS_CONFIG, L_ERROR, 0, "No such logging subsystem \"%s\"", fields[0]); } else if ((desc = feature_log_desc(from, fields[1]))) { /* set value */ if ((*desc->set)(fields[0], count < 3 ? 0 : fields[2])) { assert(count >= 3); /* should always accept default */ if (from) /* send an error */ send_reply(from, ERR_BADLOGVALUE, fields[2]); else log_write(LS_CONFIG, L_ERROR, 0, "Bad value \"%s\" for log type %s (subsystem %s)", fields[2], desc->type, subsys); } } return 0; } /** Reset a log type for a subsystem to its default value. * @param[in] from &Client trying to reset the subsystem. * @param[in] fields Array of parameters to reset. * @param[in] count Number of fields in \a fields. * @return -1 to unmark the entry, or zero to leave it alone. */ static int feature_log_reset(struct Client* from, const char* const* fields, int count) { struct LogTypes *desc; char *subsys; assert(0 != from); /* Never called by the .conf parser */ if (count < 1) { /* reset default facility */ log_set_default(0); return -1; /* unmark this entry */ } else if (count < 2) need_more_params(from, "RESET"); else if (!(subsys = log_canon(fields[0]))) /* no such subsystem */ send_reply(from, ERR_BADLOGSYS, fields[0]); else if ((desc = feature_log_desc(from, fields[1]))) /* reset value */ (*desc->set)(fields[0], 0); /* default should always be accepted */ return 0; } /** Handle an update to FEAT_HIS_SERVERNAME. */ static void feature_notify_servername(void) { ircd_strncpy(cli_name(&his), feature_str(FEAT_HIS_SERVERNAME), HOSTLEN + 1); } /** Handle an update to FEAT_HIS_SERVERINFO. */ static void feature_notify_serverinfo(void) { ircd_strncpy(cli_info(&his), feature_str(FEAT_HIS_SERVERINFO), REALLEN + 1); } /** Report the value of a log setting. * @param[in] from &Client asking for details. * @param[in] fields Array of parameters to get. * @param[in] count Number of fields in \a fields. */ static void feature_log_get(struct Client* from, const char* const* fields, int count) { struct LogTypes *desc; char *value, *subsys; assert(0 != from); /* never called by .conf parser */ if (count < 1) /* return default facility */ send_reply(from, SND_EXPLICIT | RPL_FEATURE, ":Log facility: %s", log_get_default()); else if (count < 2) need_more_params(from, "GET"); else if (!(subsys = log_canon(fields[0]))) { /* no such subsystem */ send_reply(from, ERR_BADLOGSYS, fields[0]); } else if ((desc = feature_log_desc(from, fields[1]))) { if ((value = (*desc->get)(fields[0]))) /* send along value */ send_reply(from, SND_EXPLICIT | RPL_FEATURE, ":Log %s for subsystem %s: %s", desc->type, subsys, (*desc->get)(subsys)); else send_reply(from, SND_EXPLICIT | RPL_FEATURE, ":No log %s is set for subsystem %s", desc->type, subsys); } } /** Update whether #me is a hub or not. */ static void feature_notify_hub(void) { if (feature_bool(FEAT_HUB)) SetHub(&me); else ClearHub(&me); } /** Update whether #me has oplevels support or not. */ static void feature_notify_oplevels(void) { char cmodebuf[BUFSIZE] = ""; if (feature_bool(FEAT_OPLEVELS)) SetOpLevels(&me); else ClearOpLevels(&me); /* "be,AkU,Ll,aCcDdiMmNnOpQRrSsTtZz" */ ircd_snprintf(0, cmodebuf, BUFSIZE, "b%s,%sk%s,Ll,aCcDdiMmNnOpQRrSsTtZz", feature_bool(FEAT_EXCEPTS) ? "e" : "", feature_bool(FEAT_OPLEVELS) ? "A" : "", feature_bool(FEAT_OPLEVELS) ? "U" : ""); add_isupport_s("CHANMODES", cmodebuf); } /** Update whether #me has halfops support or not. */ static void feature_notify_halfops(void) { add_isupport_s("PREFIX", feature_bool(FEAT_HALFOPS) ? "(ohv)@%+" : "(ov)@+"); add_isupport_s("STATUSMSG", feature_bool(FEAT_HALFOPS) ? "@%+" : "@+"); } static void feature_notify_excepts(void) { char imaxlist[BUFSIZE] = ""; char cmodebuf[BUFSIZE] = ""; if (feature_bool(FEAT_EXCEPTS)) { add_isupport_s("EXCEPTS", "e"); add_isupport_i("MAXEXCEPTS", feature_int(FEAT_MAXEXCEPTS)); } else { del_isupport("EXCEPTS"); del_isupport("MAXEXCEPTS"); } /* "be,AkU,Ll,aCcDdiMmNnOpQRrSsTtZz" */ ircd_snprintf(0, cmodebuf, BUFSIZE, "b%s,%sk%s,Ll,aCcDdiMmNnOpQRrSsTtZz", feature_bool(FEAT_EXCEPTS) ? "e" : "", feature_bool(FEAT_OPLEVELS) ? "A" : "", feature_bool(FEAT_OPLEVELS) ? "U" : ""); add_isupport_s("CHANMODES", cmodebuf); /* Use ircd_snprintf for safer string formatting */ if (feature_bool(FEAT_EXCEPTS)) { ircd_snprintf(0, imaxlist, sizeof(imaxlist), "b:%d,e:%d", feature_int(FEAT_MAXBANS), feature_int(FEAT_MAXEXCEPTS)); } else { ircd_snprintf(0, imaxlist, sizeof(imaxlist), "b:%d", feature_int(FEAT_MAXBANS)); } add_isupport_s("MAXLIST", imaxlist); } /** Set MAXEXCEPTS, self explanatory */ static void set_isupport_maxexcepts(void) { char imaxlist[BUFSIZE] = ""; add_isupport_i("MAXBANS", feature_int(FEAT_MAXBANS)); /* Use ircd_snprintf for safer string formatting */ if (feature_bool(FEAT_EXCEPTS)) { ircd_snprintf(0, imaxlist, sizeof(imaxlist), "b:%d,e:%d", feature_int(FEAT_MAXBANS), feature_int(FEAT_MAXEXCEPTS)); } else { ircd_snprintf(0, imaxlist, sizeof(imaxlist), "b:%d", feature_int(FEAT_MAXBANS)); } add_isupport_s("MAXLIST", imaxlist); } /** Set EXTBANS if they are enabled. */ static void set_isupport_extbans(void) { char imaxlist[BUFSIZE] = ""; if (feature_bool(FEAT_EXTBANS)) { strcat(imaxlist, "~,"); if (feature_bool(FEAT_EXTBAN_a)) strcat(imaxlist, "a"); if (feature_bool(FEAT_EXTBAN_c)) strcat(imaxlist, "c"); if (feature_bool(FEAT_EXTBAN_j)) strcat(imaxlist, "j"); if (feature_bool(FEAT_EXTBAN_n)) strcat(imaxlist, "n"); if (feature_bool(FEAT_EXTBAN_q)) strcat(imaxlist, "q"); if (feature_bool(FEAT_EXTBAN_r)) strcat(imaxlist, "r"); if (feature_bool(FEAT_EXTBAN_m)) strcat(imaxlist, "m"); if (feature_bool(FEAT_EXTBAN_M)) strcat(imaxlist, "M"); add_isupport_s("EXTBANS", imaxlist); } } /** Handle update to FEAT_GEOIP_ENABLE. */ static void feature_notify_geoip_enable(void) { geoip_handle_enable(); } /** Handle update to FEAT_MMDB_FILE. */ static void feature_notify_geoip_mmdb_file(void) { geoip_handle_mmdb_file(); } /** Handle update to FEAT_GEOIP_FILE. */ static void feature_notify_geoip_file(void) { geoip_handle_file(); } /** Handle update to FEAT_GEOIP_IPV6_FILE. */ static void feature_notify_geoip_ipv6_file(void) { geoip_handle_ipv6_file(); } /** Set WATCH if they are enabled. */ static void set_isupport_watchs(void) { add_isupport_i("WATCH", feature_int(FEAT_MAXWATCHS)); } /** Set MAXSILES (maximum silences). */ static void set_isupport_maxsiles(void) { add_isupport_i("SILENCE", feature_int(FEAT_MAXSILES)); } /** Set MAXCHANNNELS, self explanatory */ static void set_isupport_maxchannels(void) { /* uint */ add_isupport_i("MAXCHANNELS", feature_int(FEAT_MAXCHANNELSPERUSER)); } /** Set MAXBANS, self explanatory */ static void set_isupport_maxbans(void) { char imaxlist[BUFSIZE] = ""; add_isupport_i("MAXBANS", feature_int(FEAT_MAXBANS)); strcat(imaxlist, "b:"); strcat(imaxlist, itoa(feature_int(FEAT_MAXBANS))); if (feature_bool(FEAT_EXCEPTS)) { strcat(imaxlist, ",e:"); strcat(imaxlist, itoa(feature_int(FEAT_MAXEXCEPTS))); } add_isupport_s("MAXLIST", imaxlist); } /** Set NICKLEN, self explanatory */ static void set_isupport_nicklen(void) { /* uint */ add_isupport_i("NICKLEN", feature_int(FEAT_NICKLEN)); } /** Set CHANNELLEN, self explanatory */ static void set_isupport_channellen(void) { /* uint */ add_isupport_i("CHANNELLEN", feature_int(FEAT_CHANNELLEN)); } /** Set CHANTYPES, self explanatory */ static void set_isupport_chantypes(void) { add_isupport_s("CHANTYPES", feature_bool(FEAT_LOCAL_CHANNELS) ? "#&" : "#"); } /** Set NETWORK, self explanatory */ static void set_isupport_network(void) { add_isupport_s("NETWORK", feature_str(FEAT_NETWORK)); } /** Sets a feature to the given value. * @param[in] from Client trying to set parameters. * @param[in] fields Array of parameters to set. * @param[in] count Number of fields in \a count. * @return <0 to clear the feature mark, 0 to leave it, >0 to set the feature mark. */ typedef int (*feat_set_call)(struct Client* from, const char* const* fields, int count); /** Gets the value of a feature. * @param[in] from Client trying to get parameters. * @param[in] fields Array of parameters to set. * @param[in] count Number of fields in \a count. */ typedef void (*feat_get_call)(struct Client* from, const char* const* fields, int count); /** Callback to notify of a feature's change. */ typedef void (*feat_notify_call)(void); /** Unmarks all sub-feature values prior to reading .conf. */ typedef void (*feat_unmark_call)(void); /** Resets to defaults all currently unmarked values. * @param[in] marked Non-zero if the feature is marked. */ typedef int (*feat_mark_call)(int marked); /* Reports features as a /stats f list. * @param[in] sptr Client asking for feature list. * @param[in] marked Non-zero if the feature is marked. */ typedef void (*feat_report_call)(struct Client* sptr, int marked); #define FEAT_NONE 0x0000 /**< no value */ #define FEAT_INT 0x0001 /**< set if entry contains an integer value */ #define FEAT_BOOL 0x0002 /**< set if entry contains a boolean value */ #define FEAT_STR 0x0003 /**< set if entry contains a string value */ #define FEAT_ALIAS 0x0004 /**< set if entry is alias for another entry */ #define FEAT_MASK 0x000f /**< possible value types */ #define FEAT_MARK 0x0010 /**< set if entry has been changed */ #define FEAT_NULL 0x0020 /**< NULL string is permitted */ #define FEAT_CASE 0x0040 /**< string is case-sensitive */ #define FEAT_OPER 0x0100 /**< set to display only to opers */ #define FEAT_MYOPER 0x0200 /**< set to display only to local opers */ #define FEAT_NODISP 0x0400 /**< feature must never be displayed */ #define FEAT_READ 0x1000 /**< feature is read-only (for now, perhaps?) */ /** Declare a feature with custom behavior. */ #define F_N(type, flags, set, reset, get, notify, unmark, mark, report) \ { FEAT_ ## type, #type, FEAT_NONE | (flags), 0, 0, 0, 0, \ (set), (reset), (get), (notify), (unmark), (mark), (report) } /** Declare a feature that takes integer values. */ #define F_I(type, flags, v_int, notify) \ { FEAT_ ## type, #type, FEAT_INT | (flags), 0, (v_int), 0, 0, \ 0, 0, 0, (notify), 0, 0, 0 } /** Declare a feature that takes boolean values. */ #define F_B(type, flags, v_int, notify) \ { FEAT_ ## type, #type, FEAT_BOOL | (flags), 0, (v_int), 0, 0, \ 0, 0, 0, (notify), 0, 0, 0 } /** Declare a feature that takes string values. */ #define F_S(type, flags, v_str, notify) \ { FEAT_ ## type, #type, FEAT_STR | (flags), 0, 0, 0, (v_str), \ 0, 0, 0, (notify), 0, 0, 0 } /** Declare a feature as an alias for another feature. */ #define F_A(type, alias) \ { FEAT_ ## type, #type, FEAT_ALIAS, 0, FEAT_ ## alias, 0, 0, \ 0, 0, 0, 0, 0, 0, 0 } /** Table of feature descriptions. */ static struct FeatureDesc { enum Feature feat; /**< feature identifier */ char* type; /**< string describing type */ unsigned int flags; /**< flags for feature */ int v_int; /**< integer value */ int def_int; /**< default value */ char* v_str; /**< string value */ char* def_str; /**< default value */ feat_set_call set; /**< set feature values */ feat_set_call reset; /**< reset feature values to defaults */ feat_get_call get; /**< get feature values */ feat_notify_call notify; /**< notify of value change */ feat_unmark_call unmark; /**< unmark all feature change values */ feat_mark_call mark; /**< reset to defaults all unchanged features */ feat_report_call report; /**< report feature values */ } features[] = { /* Misc. features */ F_N(LOG, FEAT_MYOPER, feature_log_set, feature_log_reset, feature_log_get, 0, log_feature_unmark, log_feature_mark, log_feature_report), F_S(DOMAINNAME, 0, DOMAINNAME, 0), F_B(RELIABLE_CLOCK, 0, 1, 0), F_I(BUFFERPOOL, 0, 27000000, 0), F_B(HAS_FERGUSON_FLUSHER, 0, 0, 0), F_I(CLIENT_FLOOD, 0, 1024, 0), F_I(SERVER_PORT, FEAT_OPER, 4400, 0), F_B(NODEFAULTMOTD, 0, 1, 0), F_S(MOTD_BANNER, FEAT_NULL, 0, 0), F_S(PROVIDER, FEAT_NULL, 0, 0), F_B(KILL_IPMISMATCH, FEAT_OPER, 0, 0), F_B(IDLE_FROM_MSG, 0, 1, 0), F_B(HUB, 0, 0, feature_notify_hub), F_B(WALLOPS_OPER_ONLY, 0, 0, 0), F_B(NODNS, 0, 0, 0), F_N(RANDOM_SEED, FEAT_NODISP, random_seed_set, 0, 0, 0, 0, 0, 0), F_S(DEFAULT_LIST_PARAM, FEAT_NULL, 0, list_set_default), F_I(NICKNAMEHISTORYLENGTH, 0, 800, whowas_realloc), F_B(HOST_HIDING, 0, 1, 0), F_S(HIDDEN_HOST, FEAT_CASE, "Users.Nefarious", 0), F_S(HIDDEN_IP, 0, "127.0.0.1", 0), F_B(CONNEXIT_NOTICES, 0, 0, 0), F_B(OPLEVELS, 0, 0, feature_notify_oplevels), F_B(ZANNELS, 0, 0, 0), F_B(LOCAL_CHANNELS, 0, 1, set_isupport_chantypes), F_B(TOPIC_BURST, 0, 1, 0), F_B(DISABLE_GLINES, 0, 0, 0), /* features that probably should not be touched */ F_I(KILLCHASETIMELIMIT, 0, 30, 0), F_I(MAXCHANNELSPERUSER, 0, 20, set_isupport_maxchannels), F_I(NICKLEN, 0, 15, set_isupport_nicklen), F_I(AVBANLEN, 0, 40, 0), F_I(MAXBANS, 0, 50, set_isupport_maxbans), F_I(MAXSILES, 0, 25, set_isupport_maxsiles), F_I(HANGONGOODLINK, 0, 300, 0), F_I(HANGONRETRYDELAY, 0, 10, 0), F_I(CONNECTTIMEOUT, 0, 60, 0), F_I(MAXIMUM_LINKS, 0, 1, init_class), /* reinit class 0 as needed */ F_I(PINGFREQUENCY, 0, 120, init_class), F_I(CONNECTFREQUENCY, 0, 600, init_class), F_I(DEFAULTMAXSENDQLENGTH, 0, 40000, init_class), F_I(GLINEMAXUSERCOUNT, 0, 20, 0), F_I(SOCKSENDBUF, 0, SERVER_TCP_WINDOW, 0), F_I(SOCKRECVBUF, 0, SERVER_TCP_WINDOW, 0), F_I(IPCHECK_CLONE_LIMIT, 0, 4, 0), F_I(IPCHECK_CLONE_PERIOD, 0, 40, 0), F_I(IPCHECK_CLONE_DELAY, 0, 600, 0), F_I(CHANNELLEN, 0, 200, set_isupport_channellen), /* Some misc. default paths */ F_S(MPATH, FEAT_CASE | FEAT_MYOPER, "ircd.motd", motd_init), F_S(RPATH, FEAT_CASE | FEAT_MYOPER, "remote.motd", motd_init), F_S(PPATH, FEAT_CASE | FEAT_MYOPER | FEAT_READ, "ircd.pid", 0), /* Networking features */ F_I(TOS_SERVER, 0, 0x08, 0), F_I(TOS_CLIENT, 0, 0x08, 0), F_I(POLLS_PER_LOOP, 0, 200, 0), F_I(IRCD_RES_RETRIES, 0, 2, 0), F_I(IRCD_RES_TIMEOUT, 0, 4, 0), F_I(AUTH_TIMEOUT, 0, 9, 0), F_B(ANNOUNCE_INVITES, 0, 0, 0), /* features that affect all operators */ F_B(CONFIG_OPERCMDS, 0, 1, 0), /* HEAD_IN_SAND Features */ F_B(HIS_SNOTICES, 0, 1, 0), F_B(HIS_SNOTICES_OPER_ONLY, 0, 1, 0), F_B(HIS_DEBUG_OPER_ONLY, 0, 1, 0), F_B(HIS_WALLOPS, 0, 1, 0), F_B(HIS_MAP, 0, 1, 0), F_B(HIS_LINKS, 0, 1, 0), F_B(HIS_TRACE, 0, 1, 0), F_B(HIS_STATS_a, 0, 1, 0), F_B(HIS_STATS_c, 0, 1, 0), F_B(HIS_STATS_d, 0, 1, 0), F_B(HIS_STATS_e, 0, 1, 0), F_B(HIS_STATS_f, 0, 1, 0), F_B(HIS_STATS_g, 0, 1, 0), F_B(HIS_STATS_i, 0, 1, 0), F_B(HIS_STATS_j, 0, 1, 0), F_B(HIS_STATS_J, 0, 1, 0), F_B(HIS_STATS_k, 0, 1, 0), F_B(HIS_STATS_l, 0, 1, 0), F_B(HIS_STATS_L, 0, 1, 0), F_B(HIS_STATS_M, 0, 1, 0), F_B(HIS_STATS_m, 0, 1, 0), F_B(HIS_STATS_o, 0, 1, 0), F_B(HIS_STATS_p, 0, 1, 0), F_B(HIS_STATS_q, 0, 1, 0), F_B(HIS_STATS_R, 0, 1, 0), F_B(HIS_STATS_r, 0, 1, 0), F_B(HIS_STATS_S, 0, 1, 0), F_B(HIS_STATS_t, 0, 1, 0), F_B(HIS_STATS_T, 0, 1, 0), F_B(HIS_STATS_u, 0, 0, 0), F_B(HIS_STATS_U, 0, 1, 0), F_B(HIS_STATS_v, 0, 1, 0), F_B(HIS_STATS_w, 0, 0, 0), F_B(HIS_STATS_x, 0, 1, 0), F_B(HIS_STATS_y, 0, 1, 0), F_B(HIS_STATS_z, 0, 1, 0), F_B(HIS_STATS_IAUTH, 0, 1, 0), F_B(HIS_WHOIS_SERVERNAME, 0, 1, 0), F_B(HIS_WHOIS_IDLETIME, 0, 1, 0), F_B(HIS_WHOIS_LOCALCHAN, 0, 1, 0), F_B(HIS_WHO_SERVERNAME, 0, 1, 0), F_B(HIS_WHO_HOPCOUNT, 0, 1, 0), F_B(HIS_MODEWHO, 0, 1, 0), F_B(HIS_BANWHO, 0, 1, 0), F_B(HIS_KILLWHO, 0, 0, 0), F_B(HIS_REWRITE, 0, 1, 0), F_I(HIS_REMOTE, 0, 1, 0), F_B(HIS_NETSPLIT, 0, 1, 0), F_S(HIS_SERVERNAME, 0, "*.Nefarious", feature_notify_servername), F_S(HIS_SERVERINFO, 0, "evilnet development", feature_notify_serverinfo), F_S(HIS_URLSERVERS, 0, "http://sourceforge.net/projects/evilnet/", 0), /* Misc. random stuff */ F_S(NETWORK, 0, "Nefarious", set_isupport_network), F_S(URL_CLIENTS, 0, "http://www.ircreviews.org/clients/", 0), F_S(URLREG, 0, "http://sourceforge.net/projects/evilnet/", 0), /* Nefarious FEAT_'s */ F_B(CHECK, 0, 1, 0), F_B(CHECK_EXTENDED, 0, 1, 0), F_I(MAX_CHECK_OUTPUT, 0, 1000, 0), F_B(OPER_WHOIS_PARANOIA, 0, 0, 0), F_B(OPER_HIDE, 0, 0, 0), F_B(AUTOCHANMODES, 0, 0, 0), F_S(AUTOCHANMODES_LIST, FEAT_CASE | FEAT_NULL, 0, 0), F_B(UHNAMES, 0, 1, 0), F_S(RESTARTPASS, FEAT_NULL | FEAT_CASE | FEAT_NODISP | FEAT_READ, 0, 0), F_S(DIEPASS, FEAT_NULL | FEAT_CASE | FEAT_NODISP | FEAT_READ, 0, 0), F_B(HIS_STATS_W, 0, 1, 0), F_S(WHOIS_OPER, 0, "is an IRC Operator", 0), F_S(WHOIS_ADMIN, 0, "is an IRC Administrator", 0), F_S(WHOIS_SERVICE, 0, "is a Network Service", 0), F_B(TARGET_LIMITING, 0, 1, 0), F_B(OPER_XTRAOP, 0, 0, 0), F_B(REMOTE_OPER, 0, 1, 0), F_B(OPERMOTD, 0, 0, 0), F_B(RULES, 0, 0, 0), F_B(DISABLE_SHUNS, 0, 0, 0), F_I(SHUNMAXUSERCOUNT, 0, 20, 0), F_B(HIS_SHUN_REASON, 0, 1, 0), F_B(HIS_GLINE_REASON, 0, 0, 0), F_B(NOIDENT, 0, 0, 0), F_B(EXTENDED_ACCOUNTS, 0, 1, 0), F_B(LOGIN_ON_CONNECT, 0, 0, 0), F_B(LOC_SENDHOST, 0, 0, 0), F_B(LOC_SENDSSLFP, 0, 0, 0), F_S(LOC_DEFAULT_SERVICE, 0, "AuthServ", 0), F_I(LOC_TIMEOUT, 0, 3, 0), F_B(STRICTUSERNAME, 0, 0, 0), F_B(APASS_CANSEND, 0, 0, 0), F_B(HOST_IN_TOPIC, 0, 1, 0), F_B(HIS_STATS_s, 0, 1, 0), F_B(SETHOST, 0, 1, 0), F_B(FLEXIBLEKEYS, 0, 0, 0), F_B(HIS_STATS_E, 0, 1, 0), F_S(SASL_SERVER, 0, "*", 0), F_I(LISTDELAY, 0, 0, 0), F_B(ALLOW_OPLEVEL_CHANGE, 0, 0, 0), F_B(NETWORK_REHASH, 0, 1, 0), F_B(LIST_SHOWMODES_OPERONLY, 0, 0, 0), F_S(LIST_PRIVATE_CHANNELS, FEAT_NULL, 0, 0), F_I(MAXWATCHS, 0, 128, set_isupport_watchs), F_B(HIS_STATS_Z, 0, 1, 0), F_I(SASL_TIMEOUT, 0, 10, 0), F_B(NOMULTITARGETS, 0, 0, 0), F_B(HIS_IRCOPS, 0, 1, 0), F_B(HIS_IRCOPS_SERVERS, 0, 1, 0), F_B(SASL_SENDHOST, 0, 1, 0), F_B(SASL_AUTOHIDEHOST, 0, 1, 0), F_I(SNOMASK_DEFAULT, 0, SNO_DEFAULT, 0), F_I(SNOMASK_OPERDEFAULT, 0, SNO_OPERDEFAULT, 0), F_S(TPATH, FEAT_CASE | FEAT_MYOPER, "ircd.tune", 0), F_B(CHMODE_m_NONICKCHANGE, 0, 1, 0 ), F_B(CHMODE_r_NONICKCHANGE, 0, 1, 0 ), F_B(SILENCE_CHANMSGS, 0, 1, 0 ), F_B(CHANNEL_CREATE_IRCOPONLY, 0, 0, 0 ), F_B(JOIN_ON_REMOVEDELAY, 0, 1, 0 ), F_B(DERESTRICT_HIDECHANS, 0, 1, 0 ), F_B(VALID_UTF8_CHANNELS_ONLY, 0, 1, 0 ), /* Extended channel modes */ F_B(CHMODE_a, 0, 1, 0), F_B(CHMODE_c, 0, 1, 0), F_B(CHMODE_C, 0, 1, 0), F_B(CHMODE_L, 0, 1, 0), F_B(CHMODE_M, 0, 1, 0), F_B(CHMODE_N, 0, 1, 0), F_B(CHMODE_O, 0, 1, 0), F_B(CHMODE_Q, 0, 1, 0), F_B(CHMODE_S, 0, 1, 0), F_B(CHMODE_T, 0, 1, 0), F_B(CHMODE_Z, 0, 1, 0), F_B(HALFOPS, FEAT_READ, 0, feature_notify_halfops), F_B(EXCEPTS, FEAT_READ, 0, feature_notify_excepts), F_I(MAXEXCEPTS, 0, 45, set_isupport_maxexcepts), F_I(AVEXCEPTLEN, 0, 40, 0), F_B(CHMODE_e_CHMODEEXCEPTION, 0, 0, 0), F_B(HALFOP_DEHALFOP_SELF, 0, 0, 0), F_B(CHMODE_Z_STRICT, 0, 1, 0), F_I(MAX_BOUNCE, 0, 5, 0), /* Extended bans */ F_B(EXTBANS, 0, 0, set_isupport_extbans), F_I(EXTBAN_j_MAXDEPTH, 0, 1, 0), F_I(EXTBAN_j_MAXPERCHAN, 0, 2, 0), F_B(EXTBAN_a, 0, 1, set_isupport_extbans), F_B(EXTBAN_c, 0, 1, set_isupport_extbans), F_B(EXTBAN_j, 0, 1, set_isupport_extbans), F_B(EXTBAN_n, 0, 1, set_isupport_extbans), F_B(EXTBAN_q, 0, 1, set_isupport_extbans), F_B(EXTBAN_r, 0, 1, set_isupport_extbans), F_B(EXTBAN_m, 0, 1, set_isupport_extbans), F_B(EXTBAN_M, 0, 1, set_isupport_extbans), /* Some misc. Nefarious default paths */ F_S(OMPATH, FEAT_CASE | FEAT_MYOPER, "ircd.opermotd", motd_init), F_S(EPATH, FEAT_CASE | FEAT_MYOPER, "ircd.rules", motd_init), /* Host hiding FEAT_'s */ F_B(HIDDEN_HOST_QUIT, 0, 1, 0), F_S(HIDDEN_HOST_SET_MESSAGE, 0, "Registered", 0), F_S(HIDDEN_HOST_UNSET_MESSAGE, 0, "UnRegistered", 0), F_B(ALLOWRMX, 0, 0, 0), F_B(OPERHOST_HIDING, 0, 1, 0), F_S(HIDDEN_OPERHOST, FEAT_CASE, "Staff.Nefarious", 0), F_I(HOST_HIDING_STYLE, 0, 1, 0), F_S(HOST_HIDING_PREFIX, 0, "Nefarious", 0), F_S(HOST_HIDING_KEY1, 0, "aoAr1HnR6gl3sJ7hVz4Zb7x4YwpW", 0), F_S(HOST_HIDING_KEY2, 0, "sdfjkLJKHlkjdkfjsdklfjlkjKLJ", 0), F_S(HOST_HIDING_KEY3, 0, "KJklJSDFLkjLKDFJSLKjlKJFlkjS", 0), F_A(HOST_HIDING_COMPONANTS, HOST_HIDING_COMPONENTS), F_I(HOST_HIDING_COMPONENTS, 0, 1, 0), /* CTCP VERSION FEAT_'s */ F_B(CTCP_VERSIONING, 0, 0, 0), F_B(CTCP_VERSIONING_KILL, 0, 0, 0), F_B(CTCP_VERSIONING_CHAN, 0, 0, 0), F_S(CTCP_VERSIONING_CHANNAME, 0, "#opers", 0), F_B(CTCP_VERSIONING_USEMSG, 0, 0, 0), F_S(CTCP_VERSIONING_NOTICE, 0, "*** Checking your client version", 0), F_S(CTCP_VERSIONING_NICK, FEAT_NULL, 0, 0), /* GeoIP FEAT_'s */ F_B(GEOIP_ENABLE, 0, 0, feature_notify_geoip_enable), F_S(MMDB_FILE, 0, "GeoLite2-Country.mmdb", feature_notify_geoip_mmdb_file), F_S(GEOIP_FILE, 0, "GeoIP.dat", feature_notify_geoip_file), F_S(GEOIP_IPV6_FILE, 0, "GeoIPv6.dat", feature_notify_geoip_ipv6_file), /* SSL FEAT_'s */ F_S(SSL_CERTFILE, FEAT_CASE, "ircd.pem", 0), F_S(SSL_KEYFILE, FEAT_CASE, "ircd.pem", 0), F_S(SSL_CACERTFILE, FEAT_CASE | FEAT_NULL, 0, 0), F_B(SSL_VERIFYCERT, 0, 0, 0), F_B(SSL_NOSELFSIGNED, 0, 0, 0), F_B(SSL_REQUIRECLIENTCERT, 0, 0, 0), F_B(SSL_NOSSLV2, 0, 1, 0), F_B(SSL_NOSSLV3, 0, 1, 0), F_B(SSL_NOTLSV1, 0, 1, 0), F_S(SSL_CIPHERS, FEAT_NULL, 0, 0), /* ZLINE FEAT_'s */ F_B(DISABLE_ZLINES, 0, 0, 0), F_B(HIS_ZLINE_REASON, 0, 0, 0), F_I(ZLINEMAXUSERCOUNT, 0, 20, 0), /* CAP FEAT_'s */ F_B(CAP_multi_prefix, 0, 1, 0), F_B(CAP_userhost_in_names, 0, 1, 0), F_B(CAP_extended_join, 0, 1, 0), F_B(CAP_away_notify, 0, 1, 0), F_B(CAP_account_notify, 0, 1, 0), F_B(CAP_sasl, 0, 1, 0), #ifdef USE_SSL F_B(CAP_tls, 0, 1, 0), #endif F_B(UPING_ENABLE, FEAT_READ, 1, 0), F_I(UPING_PORT, FEAT_READ, UDP_PORT, 0), #undef F_S #undef F_B #undef F_I #undef F_N #undef F_A { FEAT_LAST_F, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }; /** Given a feature's identifier, look up the feature descriptor. * @param[in] from Client looking up feature, or NULL. * @param[in] feature Feature name to find. * @return Pointer to a FeatureDesc, or NULL if none was found. */ static struct FeatureDesc * feature_desc(struct Client* from, const char *feature) { int i; assert(0 != feature); for (i = 0; features[i].type; i++) { /* find appropriate descriptor */ if (!strcmp(feature, features[i].type)) { switch (features[i].flags & FEAT_MASK) { case FEAT_ALIAS: Debug((DEBUG_NOTICE, "Deprecated feature \"%s\" referenced; replace " "with %s", feature, features[features[i].def_int].type)); if (from) /* report a warning */ send_reply(from, SND_EXPLICIT | ERR_NOFEATURE, "%s :Feature deprecated, use %s", feature, features[features[i].def_int].type); else log_write(LS_CONFIG, L_WARNING, 0, "Feature \"%s\" deprecated, " "use \"%s\"", feature, features[features[i].def_int].type); return &features[features[i].def_int]; break; default: return &features[i]; break; } } } Debug((DEBUG_ERROR, "Unknown feature \"%s\"", feature)); if (from) /* report an error */ send_reply(from, ERR_NOFEATURE, feature); else log_write(LS_CONFIG, L_ERROR, 0, "Unknown feature \"%s\"", feature); return 0; /* not found */ } /** Given a feature vector string, set the value of a feature. * @param[in] from Client trying to set the feature, or NULL. * @param[in] fields Parameters to set, starting with feature name. * @param[in] count Number of fields in \a fields. * @return Zero (or, theoretically, CPTR_KILLED). */ int feature_set(struct Client* from, const char* const* fields, int count) { int i, change = 0, tmp; const char *t_str; struct FeatureDesc *feat; if (from && !HasPriv(from, PRIV_SET)) return send_reply(from, ERR_NOPRIVILEGES); if (count < 1) { if (from) /* report an error in the number of arguments */ need_more_params(from, "SET"); else log_write(LS_CONFIG, L_ERROR, 0, "Not enough fields in F line"); } else if ((feat = feature_desc(from, fields[0]))) { /* find feature */ if (from && feat->flags & FEAT_READ) return send_reply(from, ERR_NOFEATURE, fields[0]); switch (feat->flags & FEAT_MASK) { case FEAT_NONE: if (feat->set && (i = (*feat->set)(from, fields + 1, count - 1))) { change++; /* feature handler wants a change recorded */ if (i > 0) /* call the set callback and do marking */ feat->flags |= FEAT_MARK; else /* i < 0 */ feat->flags &= ~FEAT_MARK; break; } case FEAT_INT: /* an integer value */ tmp = feat->v_int; /* detect changes... */ if (count < 2) { /* reset value */ feat->v_int = feat->def_int; feat->flags &= ~FEAT_MARK; } else { /* ok, figure out the value and whether to mark it */ feat->v_int = strtoul(fields[1], 0, 0); if (feat->v_int == feat->def_int) feat->flags &= ~FEAT_MARK; else feat->flags |= FEAT_MARK; } if (feat->v_int != tmp) /* check for change */ change++; break; case FEAT_BOOL: /* it's a boolean value--true or false */ tmp = feat->v_int; /* detect changes... */ if (count < 2) { /* reset value */ feat->v_int = feat->def_int; feat->flags &= ~FEAT_MARK; } else { /* figure out the value and whether to mark it */ if (!ircd_strncmp(fields[1], "TRUE", strlen(fields[1])) || !ircd_strncmp(fields[1], "YES", strlen(fields[1])) || (strlen(fields[1]) >= 2 && !ircd_strncmp(fields[1], "ON", strlen(fields[1])))) feat->v_int = 1; else if (!ircd_strncmp(fields[1], "FALSE", strlen(fields[1])) || !ircd_strncmp(fields[1], "NO", strlen(fields[1])) || (strlen(fields[1]) >= 2 && !ircd_strncmp(fields[1], "OFF", strlen(fields[1])))) feat->v_int = 0; else if (from) /* report an error... */ return send_reply(from, ERR_BADFEATVALUE, fields[1], feat->type); else { log_write(LS_CONFIG, L_ERROR, 0, "Bad value \"%s\" for feature %s", fields[1], feat->type); return 0; } if (feat->v_int == feat->def_int) /* figure out whether to mark it */ feat->flags &= ~FEAT_MARK; else feat->flags |= FEAT_MARK; } if (feat->v_int != tmp) /* check for change */ change++; break; case FEAT_STR: /* it's a string value */ if (count < 2) t_str = feat->def_str; /* changing to default */ else t_str = *fields[1] ? fields[1] : 0; if (!t_str && !(feat->flags & FEAT_NULL)) { /* NULL value permitted? */ if (from) return send_reply(from, ERR_BADFEATVALUE, "NULL", feat->type); else { log_write(LS_CONFIG, L_ERROR, 0, "Bad value \"NULL\" for feature %s", feat->type); return 0; } } if (t_str == feat->def_str || (t_str && feat->def_str && !(feat->flags & FEAT_CASE ? strcmp(t_str, feat->def_str) : ircd_strcmp(t_str, feat->def_str)))) { /* resetting to default */ if (feat->v_str != feat->def_str) { change++; /* change from previous value */ if (feat->v_str) MyFree(feat->v_str); /* free old value */ } feat->v_str = feat->def_str; /* very special... */ feat->flags &= ~FEAT_MARK; } else if (!t_str) { if (feat->v_str) { change++; /* change from previous value */ if (feat->v_str != feat->def_str) MyFree(feat->v_str); /* free old value */ } feat->v_str = 0; /* set it to NULL */ feat->flags |= FEAT_MARK; } else if (!feat->v_str || (feat->flags & FEAT_CASE ? strcmp(t_str, feat->v_str) : ircd_strcmp(t_str, feat->v_str))) { /* new value */ change++; /* change from previous value */ if (feat->v_str && feat->v_str != feat->def_str) MyFree(feat->v_str); /* free old value */ DupString(feat->v_str, t_str); /* store new value */ feat->flags |= FEAT_MARK; } else /* they match, but don't match the default */ feat->flags |= FEAT_MARK; break; } if (change && feat->notify) /* call change notify function */ (*feat->notify)(); if (from) return feature_get(from, fields, count); } return 0; } /** Reset a feature to its default values. * @param[in] from Client trying to reset the feature, or NULL. * @param[in] fields Parameters to set, starting with feature name. * @param[in] count Number of fields in \a fields. * @return Zero (or, theoretically, CPTR_KILLED). */ int feature_reset(struct Client* from, const char* const* fields, int count) { int i, change = 0; struct FeatureDesc *feat; assert(0 != from); if (!HasPriv(from, PRIV_SET)) return send_reply(from, ERR_NOPRIVILEGES); if (count < 1) /* check arguments */ need_more_params(from, "RESET"); else if ((feat = feature_desc(from, fields[0]))) { /* get descriptor */ if (from && feat->flags & FEAT_READ) return send_reply(from, ERR_NOFEATURE, fields[0]); switch (feat->flags & FEAT_MASK) { case FEAT_NONE: /* None... */ if (feat->reset && (i = (*feat->reset)(from, fields + 1, count - 1))) { change++; /* feature handler wants a change recorded */ if (i > 0) /* call reset callback and parse mark return */ feat->flags |= FEAT_MARK; else /* i < 0 */ feat->flags &= ~FEAT_MARK; } break; case FEAT_INT: /* Integer... */ case FEAT_BOOL: /* Boolean... */ if (feat->v_int != feat->def_int) change++; /* change will be made */ feat->v_int = feat->def_int; /* set the default */ feat->flags &= ~FEAT_MARK; /* unmark it */ break; case FEAT_STR: /* string! */ if (feat->v_str != feat->def_str) { change++; /* change has been made */ if (feat->v_str) MyFree(feat->v_str); /* free old value */ } feat->v_str = feat->def_str; /* set it to default */ feat->flags &= ~FEAT_MARK; /* unmark it */ break; } if (change && feat->notify) /* call change notify function */ (*feat->notify)(); if (from) return feature_get(from, fields, count); } return 0; } /** Gets the value of a specific feature and reports it to the user. * @param[in] from Client trying to get the feature. * @param[in] fields Parameters to set, starting with feature name. * @param[in] count Number of fields in \a fields. * @return Zero (or, theoretically, CPTR_KILLED). */ int feature_get(struct Client* from, const char* const* fields, int count) { struct FeatureDesc *feat; assert(0 != from); if (count < 1) /* check parameters */ need_more_params(from, "GET"); else if ((feat = feature_desc(from, fields[0]))) { if ((feat->flags & FEAT_NODISP) || (feat->flags & FEAT_MYOPER && !MyOper(from)) || (feat->flags & FEAT_OPER && !IsAnOper(from))) /* check privs */ return send_reply(from, ERR_NOPRIVILEGES); switch (feat->flags & FEAT_MASK) { case FEAT_NONE: /* none, call the callback... */ if (feat->get) /* if there's a callback, use it */ (*feat->get)(from, fields + 1, count - 1); break; case FEAT_INT: /* integer, report integer value */ send_reply(from, SND_EXPLICIT | RPL_FEATURE, ":Integer value of %s: %d", feat->type, feat->v_int); break; case FEAT_BOOL: /* boolean, report boolean value */ send_reply(from, SND_EXPLICIT | RPL_FEATURE, ":Boolean value of %s: %s", feat->type, feat->v_int ? "TRUE" : "FALSE"); break; case FEAT_STR: /* string, report string value */ if (feat->v_str) /* deal with null case */ send_reply(from, SND_EXPLICIT | RPL_FEATURE, ":String value of %s: %s", feat->type, feat->v_str); else send_reply(from, SND_EXPLICIT | RPL_FEATURE, ":String value for %s not set", feat->type); break; } } return 0; } /** Called before reading the .conf to clear all dirty marks. */ void feature_unmark(void) { int i; for (i = 0; features[i].type; i++) { features[i].flags &= ~FEAT_MARK; /* clear the marks... */ if (features[i].unmark) /* call the unmark callback if necessary */ (*features[i].unmark)(); } } /** Called after reading the .conf to reset unmodified values to defaults. */ void feature_mark(void) { int i, change; for (i = 0; features[i].type; i++) { change = 0; switch (features[i].flags & FEAT_MASK) { case FEAT_NONE: if (features[i].mark && (*features[i].mark)(features[i].flags & FEAT_MARK ? 1 : 0)) change++; /* feature handler wants a change recorded */ break; case FEAT_INT: /* Integers or Booleans... */ case FEAT_BOOL: if (!(features[i].flags & FEAT_MARK)) { /* not changed? */ if (features[i].v_int != features[i].def_int) change++; /* we're making a change */ features[i].v_int = features[i].def_int; } break; case FEAT_STR: /* strings... */ if (!(features[i].flags & FEAT_MARK)) { /* not changed? */ if (features[i].v_str != features[i].def_str) { change++; /* we're making a change */ if (features[i].v_str) MyFree(features[i].v_str); /* free old value */ } features[i].v_str = features[i].def_str; } break; } if (change && features[i].notify) (*features[i].notify)(); /* call change notify function */ } } /** Initialize the features subsystem. */ void feature_init(void) { int i; for (i = 0; features[i].type; i++) { switch (features[i].flags & FEAT_MASK) { case FEAT_NONE: /* you're on your own */ break; case FEAT_INT: /* Integers or Booleans... */ case FEAT_BOOL: features[i].v_int = features[i].def_int; break; case FEAT_STR: /* Strings */ features[i].v_str = features[i].def_str; assert(features[i].def_str || (features[i].flags & FEAT_NULL)); break; } } cli_magic(&his) = CLIENT_MAGIC; cli_status(&his) = STAT_SERVER; feature_notify_servername(); feature_notify_serverinfo(); } /** Report all F-lines to a user. * @param[in] to Client requesting statistics. * @param[in] sd Stats descriptor for request (ignored). * @param[in] param Extra parameter from user (ignored). */ void feature_report(struct Client* to, const struct StatDesc* sd, char* param) { char changed; int report; int i; for (i = 0; features[i].type; i++) { if ((features[i].flags & FEAT_NODISP) || (features[i].flags & FEAT_MYOPER && !MyOper(to)) || (features[i].flags & FEAT_OPER && !IsAnOper(to))) continue; /* skip this one */ changed = (features[i].flags & FEAT_MARK) ? 'F' : 'f'; report = (features[i].flags & FEAT_MARK) || sd->sd_funcdata; switch (features[i].flags & FEAT_MASK) { case FEAT_NONE: if (features[i].report) /* let the callback handle this */ (*features[i].report)(to, report); break; case FEAT_INT: /* Report an F-line with integer values */ if (report) /* it's been changed */ send_reply(to, SND_EXPLICIT | RPL_STATSFLINE, "%c %s %d", changed, features[i].type, features[i].v_int); break; case FEAT_BOOL: /* Report an F-line with boolean values */ if (report) /* it's been changed */ send_reply(to, SND_EXPLICIT | RPL_STATSFLINE, "%c %s %s", changed, features[i].type, features[i].v_int ? "TRUE" : "FALSE"); break; case FEAT_STR: /* Report an F-line with string values */ if (report) { /* it's been changed */ if (features[i].v_str) send_reply(to, SND_EXPLICIT | RPL_STATSFLINE, "%c %s %s", changed, features[i].type, features[i].v_str); else /* Actually, F: would reset it; you want F:: */ send_reply(to, SND_EXPLICIT | RPL_STATSFLINE, "%c %s", changed, features[i].type); } break; } } } /** Return a feature's integer value. * @param[in] feat &Feature identifier. * @return Integer value of feature. */ int feature_int(enum Feature feat) { assert(features[feat].feat == feat); assert((features[feat].flags & FEAT_MASK) == FEAT_INT); return features[feat].v_int; } /** Return a feature's boolean value. * @param[in] feat &Feature identifier. * @return Boolean value of feature. */ int feature_bool(enum Feature feat) { assert(feat <= FEAT_LAST_F); if (FEAT_LAST_F < feat) return 0; assert(features[feat].feat == feat); assert((features[feat].flags & FEAT_MASK) == FEAT_BOOL); return features[feat].v_int; } /** Return a feature's string value. * @param[in] feat &Feature identifier. * @return String value of feature. */ const char * feature_str(enum Feature feat) { assert(features[feat].feat == feat); assert((features[feat].flags & FEAT_MASK) == FEAT_STR); return features[feat].v_str; }