doc/reference.conf: add an example TLSv1.3 ciphersuite name

[solanum.git] / ircd / s_conf.c

/*
 *  ircd-ratbox: A slightly useful ircd.
 *  s_conf.c: Configuration file functions.
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 1996-2002 Hybrid Development Team
 *  Copyright (C) 2002-2005 ircd-ratbox development team
 *
 *  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 2 of the License, 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 */

#include "stdinc.h"
#include "ircd_defs.h"
#include "s_conf.h"
#include "s_user.h"
#include "s_newconf.h"
#include "newconf.h"
#include "s_serv.h"
#include "s_stats.h"
#include "channel.h"
#include "class.h"
#include "client.h"
#include "hash.h"
#include "match.h"
#include "ircd.h"
#include "listener.h"
#include "hostmask.h"
#include "modules.h"
#include "numeric.h"
#include "logger.h"
#include "send.h"
#include "reject.h"
#include "cache.h"
#include "privilege.h"
#include "sslproc.h"
#include "wsproc.h"
#include "bandbi.h"
#include "operhash.h"
#include "chmode.h"
#include "hook.h"
#include "s_assert.h"
#include "authproc.h"
#include "supported.h"

struct config_server_hide ConfigServerHide;

extern int yyparse(void);               /* defined in y.tab.c */
extern char yy_linebuf[16384];          /* defined in ircd_lexer.l */

static rb_bh *confitem_heap = NULL;

rb_dlink_list prop_bans;

rb_dlink_list temp_klines[LAST_TEMP_TYPE];
rb_dlink_list temp_dlines[LAST_TEMP_TYPE];
rb_dlink_list service_list;

/* internally defined functions */
static void set_default_conf(void);
static void validate_conf(void);
static void read_conf(void);
static void clear_out_old_conf(void);

static void expire_prop_bans(void *list);
static void expire_temp_kd(void *list);
static void reorganise_temp_kd(void *list);

FILE *conf_fbfile_in;
extern char yytext[];

static int verify_access(struct Client *client_p, const char *username);
static struct ConfItem *find_address_conf_by_client(struct Client *client_p, const char *username);
static int attach_iline(struct Client *, struct ConfItem *);

void
init_s_conf(void)
{
        confitem_heap = rb_bh_create(sizeof(struct ConfItem), CONFITEM_HEAP_SIZE, "confitem_heap");

        rb_event_addish("expire_prop_bans", expire_prop_bans, &prop_bans, 60);

        rb_event_addish("expire_temp_klines", expire_temp_kd, &temp_klines[TEMP_MIN], 60);
        rb_event_addish("expire_temp_dlines", expire_temp_kd, &temp_dlines[TEMP_MIN], 60);

        rb_event_addish("expire_temp_klines_hour", reorganise_temp_kd,
                        &temp_klines[TEMP_HOUR], 3600);
        rb_event_addish("expire_temp_dlines_hour", reorganise_temp_kd,
                        &temp_dlines[TEMP_HOUR], 3600);
        rb_event_addish("expire_temp_klines_day", reorganise_temp_kd,
                        &temp_klines[TEMP_DAY], 86400);
        rb_event_addish("expire_temp_dlines_day", reorganise_temp_kd,
                        &temp_dlines[TEMP_DAY], 86400);
        rb_event_addish("expire_temp_klines_week", reorganise_temp_kd,
                        &temp_klines[TEMP_WEEK], 604800);
        rb_event_addish("expire_temp_dlines_week", reorganise_temp_kd,
                        &temp_dlines[TEMP_WEEK], 604800);
}

/*
 * make_conf
 *
 * inputs       - none
 * output       - pointer to new conf entry
 * side effects - none
 */
struct ConfItem *
make_conf()
{
        struct ConfItem *aconf;

        aconf = rb_bh_alloc(confitem_heap);
        aconf->status = CONF_ILLEGAL;
        return (aconf);
}

/*
 * free_conf
 *
 * inputs       - pointer to conf to free
 * output       - none
 * side effects - crucial password fields are zeroed, conf is freed
 */
void
free_conf(struct ConfItem *aconf)
{
        s_assert(aconf != NULL);
        if(aconf == NULL)
                return;

        /* security.. */
        if(aconf->passwd)
                memset(aconf->passwd, 0, strlen(aconf->passwd));
        if(aconf->spasswd)
                memset(aconf->spasswd, 0, strlen(aconf->spasswd));

        rb_free(aconf->passwd);
        rb_free(aconf->spasswd);
        rb_free(aconf->className);
        rb_free(aconf->user);
        rb_free(aconf->host);

        if(IsConfBan(aconf))
                operhash_delete(aconf->info.oper);
        else
                rb_free(aconf->info.name);

        rb_bh_free(confitem_heap, aconf);
}

/*
 * check_client
 *
 * inputs       - pointer to client
 * output       - 0 = Success
 *                NOT_AUTHORISED (-1) = Access denied (no I line match)
 *                I_SOCKET_ERROR (-2) = Bad socket.
 *                I_LINE_FULL    (-3) = I-line is full
 *                TOO_MANY       (-4) = Too many connections from hostname
 *                BANNED_CLIENT  (-5) = K-lined
 * side effects - Ordinary client access check.
 *                Look for conf lines which have the same
 *                status as the flags passed.
 */
int
check_client(struct Client *client_p, struct Client *source_p, const char *username)
{
        int i;

        if((i = verify_access(source_p, username)))
        {
                ilog(L_FUSER, "Access denied: %s[%s]",
                     source_p->name, source_p->sockhost);
        }

        switch (i)
        {
        case I_SOCKET_ERROR:
                exit_client(client_p, source_p, &me, "Socket Error");
                break;

        case TOO_MANY_LOCAL:
                /* Note that these notices are sent to opers on other
                 * servers also, so even if local opers are allowed to
                 * see the IP, we still cannot send it.
                 */
                sendto_realops_snomask(SNO_FULL, L_NETWIDE,
                                "Too many local connections for %s!%s%s@%s",
                                source_p->name, IsGotId(source_p) ? "" : "~",
                                source_p->username,
                                show_ip(NULL, source_p) && !IsIPSpoof(source_p) ? source_p->sockhost : source_p->host);

                ilog(L_FUSER, "Too many local connections from %s!%s%s@%s",
                        source_p->name, IsGotId(source_p) ? "" : "~",
                        source_p->username, source_p->sockhost);

                ServerStats.is_ref++;
                exit_client(client_p, source_p, &me, "Too many host connections (local)");
                break;

        case TOO_MANY_GLOBAL:
                sendto_realops_snomask(SNO_FULL, L_NETWIDE,
                                "Too many global connections for %s!%s%s@%s",
                                source_p->name, IsGotId(source_p) ? "" : "~",
                                source_p->username,
                                show_ip(NULL, source_p) && !IsIPSpoof(source_p) ? source_p->sockhost : source_p->host);
                ilog(L_FUSER, "Too many global connections from %s!%s%s@%s",
                        source_p->name, IsGotId(source_p) ? "" : "~",
                        source_p->username, source_p->sockhost);

                ServerStats.is_ref++;
                exit_client(client_p, source_p, &me, "Too many host connections (global)");
                break;

        case TOO_MANY_IDENT:
                sendto_realops_snomask(SNO_FULL, L_NETWIDE,
                                "Too many user connections for %s!%s%s@%s",
                                source_p->name, IsGotId(source_p) ? "" : "~",
                                source_p->username,
                                show_ip(NULL, source_p) && !IsIPSpoof(source_p) ? source_p->sockhost : source_p->host);
                ilog(L_FUSER, "Too many user connections from %s!%s%s@%s",
                        source_p->name, IsGotId(source_p) ? "" : "~",
                        source_p->username, source_p->sockhost);

                ServerStats.is_ref++;
                exit_client(client_p, source_p, &me, "Too many user connections (global)");
                break;

        case I_LINE_FULL:
                sendto_realops_snomask(SNO_FULL, L_NETWIDE,
                                "I-line is full for %s!%s%s@%s (%s).",
                                source_p->name, IsGotId(source_p) ? "" : "~",
                                source_p->username, source_p->host,
                                show_ip(NULL, source_p) && !IsIPSpoof(source_p) ? source_p->sockhost : "255.255.255.255");

                ilog(L_FUSER, "Too many connections from %s!%s%s@%s.",
                        source_p->name, IsGotId(source_p) ? "" : "~",
                        source_p->username, source_p->sockhost);

                ServerStats.is_ref++;
                exit_client(client_p, source_p, &me,
                            "No more connections allowed in your connection class");
                break;

        case NOT_AUTHORISED:
                {
                        int port = -1;
                        port = ntohs(GET_SS_PORT(&source_p->localClient->listener->addr[0]));

                        ServerStats.is_ref++;
                        /* jdc - lists server name & port connections are on */
                        /*       a purely cosmetical change */
                        /* why ipaddr, and not just source_p->sockhost? --fl */
#if 0
                        static char ipaddr[HOSTIPLEN];
                        rb_inet_ntop_sock(&source_p->localClient->ip, ipaddr, sizeof(ipaddr));
#endif
                        sendto_realops_snomask(SNO_UNAUTH, L_NETWIDE,
                                        "Unauthorised client connection from "
                                        "%s!%s%s@%s [%s] on [%s/%u].",
                                        source_p->name, IsGotId(source_p) ? "" : "~",
                                        source_p->username, source_p->host,
                                        source_p->sockhost,
                                        source_p->localClient->listener->name, port);

                        ilog(L_FUSER,
                                "Unauthorised client connection from %s!%s%s@%s on [%s/%u].",
                                source_p->name, IsGotId(source_p) ? "" : "~",
                                source_p->username, source_p->sockhost,
                                source_p->localClient->listener->name, port);
                        add_reject(client_p, NULL, NULL, NULL, "You are not authorised to use this server.");
                        exit_client(client_p, source_p, &me, "You are not authorised to use this server.");
                        break;
                }
        case BANNED_CLIENT:
                exit_client(client_p, client_p, &me, "*** Banned ");
                ServerStats.is_ref++;
                break;

        case 0:
        default:
                break;
        }
        return (i);
}

/*
 * verify_access
 *
 * inputs       - pointer to client to verify
 *              - pointer to proposed username
 * output       - 0 if success -'ve if not
 * side effect  - find the first (best) I line to attach.
 */
static int
verify_access(struct Client *client_p, const char *username)
{
        struct ConfItem *aconf;

        aconf = find_address_conf_by_client(client_p, username);
        if(aconf == NULL)
                return NOT_AUTHORISED;

        if(aconf->status & CONF_CLIENT)
        {
                if(aconf->flags & CONF_FLAGS_REDIR)
                {
                        sendto_one_numeric(client_p, RPL_REDIR, form_str(RPL_REDIR),
                                        aconf->info.name ? aconf->info.name : "", aconf->port);
                        return (NOT_AUTHORISED);
                }

                /* Thanks for spoof idea amm */
                if(IsConfDoSpoofIp(aconf))
                {
                        char *p;

                        /* show_ip() depends on this --fl */
                        SetIPSpoof(client_p);

                        if(IsConfSpoofNotice(aconf))
                        {
                                sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
                                                "%s spoofing: %s as %s",
                                                client_p->name,
                                                show_ip(NULL, client_p) ? client_p->host : aconf->info.name,
                                                aconf->info.name);
                        }

                        /* user@host spoof */
                        if((p = strchr(aconf->info.name, '@')) != NULL)
                        {
                                char *host = p+1;
                                *p = '\0';

                                rb_strlcpy(client_p->username, aconf->info.name,
                                        sizeof(client_p->username));
                                rb_strlcpy(client_p->host, host,
                                        sizeof(client_p->host));
                                *p = '@';
                        }
                        else
                                rb_strlcpy(client_p->host, aconf->info.name, sizeof(client_p->host));
                }
                return (attach_iline(client_p, aconf));
        }
        else if(aconf->status & CONF_KILL)
        {
                if(ConfigFileEntry.kline_with_reason)
                        sendto_one(client_p,
                                        form_str(ERR_YOUREBANNEDCREEP),
                                        me.name, client_p->name,
                                        get_user_ban_reason(aconf));
                add_reject(client_p, aconf->user, aconf->host, aconf, NULL);
                return (BANNED_CLIENT);
        }

        return NOT_AUTHORISED;
}


/*
 * find_address_conf_by_client
 */
static struct ConfItem *
find_address_conf_by_client(struct Client *client_p, const char *username)
{
        struct ConfItem *aconf;
        char non_ident[USERLEN + 1];

        if(IsGotId(client_p))
        {
                aconf = find_address_conf(client_p->host, client_p->sockhost,
                                        client_p->username, client_p->username,
                                        (struct sockaddr *) &client_p->localClient->ip,
                                        GET_SS_FAMILY(&client_p->localClient->ip),
                                        client_p->localClient->auth_user);
        }
        else
        {
                rb_strlcpy(non_ident, "~", sizeof(non_ident));
                rb_strlcat(non_ident, username, sizeof(non_ident));
                aconf = find_address_conf(client_p->host, client_p->sockhost,
                                        non_ident, client_p->username,
                                        (struct sockaddr *) &client_p->localClient->ip,
                                        GET_SS_FAMILY(&client_p->localClient->ip),
                                        client_p->localClient->auth_user);
        }
        return aconf;
}


/*
 * add_ip_limit
 *
 * Returns 1 if successful 0 if not
 *
 * This checks if the user has exceed the limits for their class
 * unless of course they are exempt..
 */

static int
add_ip_limit(struct Client *client_p, struct ConfItem *aconf)
{
        rb_patricia_node_t *pnode;
        int bitlen;

        /* If the limits are 0 don't do anything.. */
        if(ConfCidrAmount(aconf) == 0
           || (ConfCidrIpv4Bitlen(aconf) == 0 && ConfCidrIpv6Bitlen(aconf) == 0))
                return -1;

        pnode = rb_match_ip(ConfIpLimits(aconf), (struct sockaddr *)&client_p->localClient->ip);

        if(GET_SS_FAMILY(&client_p->localClient->ip) == AF_INET)
                bitlen = ConfCidrIpv4Bitlen(aconf);
        else
                bitlen = ConfCidrIpv6Bitlen(aconf);

        if(pnode == NULL)
                pnode = make_and_lookup_ip(ConfIpLimits(aconf), (struct sockaddr *)&client_p->localClient->ip, bitlen);

        s_assert(pnode != NULL);

        if(pnode != NULL)
        {
                if(((intptr_t)pnode->data) >= ConfCidrAmount(aconf) && !IsConfExemptLimits(aconf))
                {
                        /* This should only happen if the limits are set to 0 */
                        if((intptr_t)pnode->data == 0)
                        {
                                rb_patricia_remove(ConfIpLimits(aconf), pnode);
                        }
                        return (0);
                }

                pnode->data = (void *)(((intptr_t)pnode->data) + 1);
        }
        return 1;
}

static void
remove_ip_limit(struct Client *client_p, struct ConfItem *aconf)
{
        rb_patricia_node_t *pnode;

        /* If the limits are 0 don't do anything.. */
        if(ConfCidrAmount(aconf) == 0
           || (ConfCidrIpv4Bitlen(aconf) == 0 && ConfCidrIpv6Bitlen(aconf) == 0))
                return;

        pnode = rb_match_ip(ConfIpLimits(aconf), (struct sockaddr *)&client_p->localClient->ip);
        if(pnode == NULL)
                return;

        pnode->data = (void *)(((intptr_t)pnode->data) - 1);
        if(((intptr_t)pnode->data) == 0)
        {
                rb_patricia_remove(ConfIpLimits(aconf), pnode);
        }

}

/*
 * attach_iline
 *
 * inputs       - client pointer
 *              - conf pointer
 * output       -
 * side effects - do actual attach
 */
static int
attach_iline(struct Client *client_p, struct ConfItem *aconf)
{
        struct Client *target_p;
        rb_dlink_node *ptr;
        int local_count = 0;
        int global_count = 0;
        int ident_count = 0;
        int unidented;

        if(IsConfExemptLimits(aconf))
                return (attach_conf(client_p, aconf));

        unidented = !IsGotId(client_p) && !IsNoTilde(aconf) &&
                (!IsConfDoSpoofIp(aconf) || !strchr(aconf->info.name, '@'));

        /* find_hostname() returns the head of the list to search */
        RB_DLINK_FOREACH(ptr, find_hostname(client_p->host))
        {
                target_p = ptr->data;

                if(irccmp(client_p->host, target_p->orighost) != 0)
                        continue;

                if(MyConnect(target_p))
                        local_count++;

                global_count++;

                if(unidented)
                {
                        if(*target_p->username == '~')
                                ident_count++;
                }
                else if(irccmp(target_p->username, client_p->username) == 0)
                        ident_count++;

                if(ConfMaxLocal(aconf) && local_count >= ConfMaxLocal(aconf))
                        return (TOO_MANY_LOCAL);
                else if(ConfMaxGlobal(aconf) && global_count >= ConfMaxGlobal(aconf))
                        return (TOO_MANY_GLOBAL);
                else if(ConfMaxIdent(aconf) && ident_count >= ConfMaxIdent(aconf))
                        return (TOO_MANY_IDENT);
        }


        return (attach_conf(client_p, aconf));
}

/*
 * deref_conf
 *
 * inputs       - ConfItem that is referenced by something other than a client
 * side effects - Decrement and free ConfItem if appropriate
 */
void
deref_conf(struct ConfItem *aconf)
{
        aconf->clients--;
        if(!aconf->clients && IsIllegal(aconf))
                free_conf(aconf);
}

/*
 * detach_conf
 *
 * inputs       - pointer to client to detach
 * output       - 0 for success, -1 for failure
 * side effects - Disassociate configuration from the client.
 *                Also removes a class from the list if marked for deleting.
 */
int
detach_conf(struct Client *client_p)
{
        struct ConfItem *aconf;

        aconf = client_p->localClient->att_conf;

        if(aconf != NULL)
        {
                if(ClassPtr(aconf))
                {
                        remove_ip_limit(client_p, aconf);

                        if(ConfCurrUsers(aconf) > 0)
                                --ConfCurrUsers(aconf);

                        if(ConfMaxUsers(aconf) == -1 && ConfCurrUsers(aconf) == 0)
                        {
                                free_class(ClassPtr(aconf));
                                ClassPtr(aconf) = NULL;
                        }

                }

                aconf->clients--;
                if(!aconf->clients && IsIllegal(aconf))
                        free_conf(aconf);

                client_p->localClient->att_conf = NULL;
                return 0;
        }

        return -1;
}

/*
 * attach_conf
 *
 * inputs       - client pointer
 *              - conf pointer
 * output       -
 * side effects - Associate a specific configuration entry to a *local*
 *                client (this is the one which used in accepting the
 *                connection). Note, that this automatically changes the
 *                attachment if there was an old one...
 */
int
attach_conf(struct Client *client_p, struct ConfItem *aconf)
{
        if(IsIllegal(aconf))
                return (NOT_AUTHORISED);

        if(s_assert(ClassPtr(aconf)))
                return (NOT_AUTHORISED);

        if(!add_ip_limit(client_p, aconf))
                return (TOO_MANY_LOCAL);

        if((aconf->status & CONF_CLIENT) &&
           ConfCurrUsers(aconf) >= ConfMaxUsers(aconf) && ConfMaxUsers(aconf) > 0)
        {
                if(!IsConfExemptLimits(aconf))
                {
                        return (I_LINE_FULL);
                }
                else
                {
                        sendto_one_notice(client_p, ":*** I: line is full, but you have an >I: line!");
                }

        }

        if(client_p->localClient->att_conf != NULL)
                detach_conf(client_p);

        client_p->localClient->att_conf = aconf;

        aconf->clients++;
        ConfCurrUsers(aconf)++;
        return (0);
}

/*
 * rehash
 *
 * Actual REHASH service routine. Called with sig == 0 if it has been called
 * as a result of an operator issuing this command, else assume it has been
 * called as a result of the server receiving a HUP signal.
 */
bool
rehash(bool sig)
{
        rb_dlink_node *n;

        hook_data_rehash hdata = { sig };

        if(sig)
                sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
                                     "Got signal SIGHUP, reloading ircd conf. file");

        rehash_authd();

        /* don't close listeners until we know we can go ahead with the rehash */
        read_conf_files(false);

        if(ServerInfo.description != NULL)
                rb_strlcpy(me.info, ServerInfo.description, sizeof(me.info));
        else
                rb_strlcpy(me.info, "unknown", sizeof(me.info));

        open_logfiles();

        RB_DLINK_FOREACH(n, local_oper_list.head)
        {
                struct Client *oper = n->data;
                const char *modeparv[4];
                modeparv[0] = modeparv[1] = oper->name;
                modeparv[2] = "+";
                modeparv[3] = NULL;
                user_mode(oper, oper, 3, modeparv);
        }

        call_hook(h_rehash, &hdata);
        return false;
}

void
rehash_bans(void)
{
        bandb_rehash_bans();
}

/*
 * set_default_conf()
 *
 * inputs       - NONE
 * output       - NONE
 * side effects - Set default values here.
 *                This is called **PRIOR** to parsing the
 *                configuration file.  If you want to do some validation
 *                of values later, put them in validate_conf().
 */

static void
set_default_conf(void)
{
        /* ServerInfo.name is not rehashable */
        /* ServerInfo.name = ServerInfo.name; */
        ServerInfo.description = NULL;
        ServerInfo.network_name = NULL;

        memset(&ServerInfo.bind4, 0, sizeof(ServerInfo.bind4));
        SET_SS_FAMILY(&ServerInfo.bind4, AF_UNSPEC);
        memset(&ServerInfo.bind6, 0, sizeof(ServerInfo.bind6));
        SET_SS_FAMILY(&ServerInfo.bind6, AF_UNSPEC);

        AdminInfo.name = NULL;
        AdminInfo.email = NULL;
        AdminInfo.description = NULL;

        ConfigFileEntry.default_operstring = NULL;
        ConfigFileEntry.default_adminstring = NULL;
        ConfigFileEntry.servicestring = NULL;
        ConfigFileEntry.sasl_service = NULL;

        ConfigFileEntry.default_umodes = UMODE_INVISIBLE;
        ConfigFileEntry.failed_oper_notice = true;
        ConfigFileEntry.anti_nick_flood = false;
        ConfigFileEntry.disable_fake_channels = false;
        ConfigFileEntry.max_nick_time = 20;
        ConfigFileEntry.max_nick_changes = 5;
        ConfigFileEntry.max_accept = 20;
        ConfigFileEntry.max_monitor = 60;
        ConfigFileEntry.nick_delay = 900;       /* 15 minutes */
        ConfigFileEntry.target_change = true;
        ConfigFileEntry.anti_spam_exit_message_time = 0;
        ConfigFileEntry.ts_warn_delta = TS_WARN_DELTA_DEFAULT;
        ConfigFileEntry.ts_max_delta = TS_MAX_DELTA_DEFAULT;
        ConfigFileEntry.client_exit = true;
        ConfigFileEntry.dline_with_reason = true;
        ConfigFileEntry.kline_with_reason = true;
        ConfigFileEntry.warn_no_nline = true;
        ConfigFileEntry.non_redundant_klines = true;
        ConfigFileEntry.stats_e_disabled = false;
        ConfigFileEntry.stats_o_oper_only = false;
        ConfigFileEntry.stats_k_oper_only = 1;  /* masked */
        ConfigFileEntry.stats_l_oper_only = 1;  /* self */
        ConfigFileEntry.stats_i_oper_only = 1;  /* masked */
        ConfigFileEntry.stats_P_oper_only = false;
        ConfigFileEntry.stats_c_oper_only = false;
        ConfigFileEntry.stats_y_oper_only = false;
        ConfigFileEntry.map_oper_only = true;
        ConfigFileEntry.operspy_admin_only = false;
        ConfigFileEntry.pace_wait = 10;
        ConfigFileEntry.caller_id_wait = 60;
        ConfigFileEntry.pace_wait_simple = 1;
        ConfigFileEntry.short_motd = false;
        ConfigFileEntry.no_oper_flood = false;
        ConfigFileEntry.fname_userlog = NULL;
        ConfigFileEntry.fname_fuserlog = NULL;
        ConfigFileEntry.fname_operlog = NULL;
        ConfigFileEntry.fname_foperlog = NULL;
        ConfigFileEntry.fname_serverlog = NULL;
        ConfigFileEntry.fname_killlog = NULL;
        ConfigFileEntry.fname_klinelog = NULL;
        ConfigFileEntry.fname_operspylog = NULL;
        ConfigFileEntry.fname_ioerrorlog = NULL;
        ConfigFileEntry.hide_spoof_ips = true;
        ConfigFileEntry.hide_error_messages = 1;
        ConfigFileEntry.dots_in_ident = 0;
        ConfigFileEntry.max_targets = MAX_TARGETS_DEFAULT;
        ConfigFileEntry.use_whois_actually = true;
        ConfigFileEntry.burst_away = false;
        ConfigFileEntry.collision_fnc = true;
        ConfigFileEntry.resv_fnc = true;
        ConfigFileEntry.global_snotices = true;
        ConfigFileEntry.operspy_dont_care_user_info = false;
        ConfigFileEntry.use_propagated_bans = true;
        ConfigFileEntry.max_ratelimit_tokens = 30;
        ConfigFileEntry.away_interval = 30;
        ConfigFileEntry.tls_ciphers_oper_only = false;
        ConfigFileEntry.oper_secure_only = false;

#ifdef HAVE_LIBZ
        ConfigFileEntry.compression_level = 4;
#endif

        ConfigFileEntry.oper_umodes = UMODE_LOCOPS | UMODE_SERVNOTICE |
                UMODE_OPERWALL | UMODE_WALLOP;
        ConfigFileEntry.oper_only_umodes = UMODE_SERVNOTICE;
        ConfigFileEntry.oper_snomask = SNO_GENERAL;

        ConfigChannel.use_except = true;
        ConfigChannel.use_invex = true;
        ConfigChannel.use_forward = true;
        ConfigChannel.use_knock = true;
        ConfigChannel.knock_delay = 300;
        ConfigChannel.knock_delay_channel = 60;
        ConfigChannel.max_chans_per_user = 15;
        ConfigChannel.max_chans_per_user_large = 60;
        ConfigChannel.max_bans = 25;
        ConfigChannel.max_bans_large = 500;
        ConfigChannel.only_ascii_channels = false;
        ConfigChannel.burst_topicwho = false;
        ConfigChannel.kick_on_split_riding = false;

        ConfigChannel.default_split_user_count = 15000;
        ConfigChannel.default_split_server_count = 10;
        ConfigChannel.no_join_on_split = false;
        ConfigChannel.no_create_on_split = true;
        ConfigChannel.resv_forcepart = true;
        ConfigChannel.channel_target_change = true;
        ConfigChannel.disable_local_channels = false;
        ConfigChannel.displayed_usercount = 3;
        ConfigChannel.opmod_send_statusmsg = false;

        ConfigChannel.autochanmodes = MODE_TOPICLIMIT | MODE_NOPRIVMSGS;

        ConfigServerHide.flatten_links = 0;
        ConfigServerHide.links_delay = 300;
        ConfigServerHide.hidden = 0;
        ConfigServerHide.disable_hidden = 0;

        ConfigFileEntry.min_nonwildcard = 4;
        ConfigFileEntry.min_nonwildcard_simple = 3;
        ConfigFileEntry.default_floodcount = 8;
        ConfigFileEntry.default_ident_timeout = IDENT_TIMEOUT_DEFAULT;
        ConfigFileEntry.tkline_expire_notices = 0;

        ConfigFileEntry.reject_after_count = 5;
        ConfigFileEntry.reject_ban_time = 300;
        ConfigFileEntry.reject_duration = 120;
        ConfigFileEntry.throttle_count = 4;
        ConfigFileEntry.throttle_duration = 60;

        ConfigFileEntry.client_flood_max_lines = CLIENT_FLOOD_DEFAULT;
        ConfigFileEntry.client_flood_burst_rate = 5;
        ConfigFileEntry.client_flood_burst_max = 5;
        ConfigFileEntry.client_flood_message_time = 1;
        ConfigFileEntry.client_flood_message_num = 2;

        ServerInfo.default_max_clients = MAXCONNECTIONS;

        ConfigFileEntry.nicklen = NICKLEN;
        ConfigFileEntry.certfp_method = RB_SSL_CERTFP_METH_CERT_SHA1;
        ConfigFileEntry.hide_opers_in_whois = 0;
        ConfigFileEntry.hide_opers = 0;

        if (!alias_dict)
                alias_dict = rb_dictionary_create("alias", rb_strcasecmp);
}

/*
 * read_conf()
 *
 *
 * inputs       - None
 * output       - None
 * side effects - Read configuration file.
 */
static void
read_conf(void)
{
        lineno = 0;

        set_default_conf();     /* Set default values prior to conf parsing */
        yyparse();              /* Load the values from the conf */
        validate_conf();        /* Check to make sure some values are still okay. */
        /* Some global values are also loaded here. */
        check_class();          /* Make sure classes are valid */
        privilegeset_delete_all_illegal();
        construct_cflags_strings();
}

static void
validate_conf(void)
{
        if(ConfigFileEntry.default_ident_timeout < 1)
                ConfigFileEntry.default_ident_timeout = IDENT_TIMEOUT_DEFAULT;

        if(ConfigFileEntry.ts_warn_delta < TS_WARN_DELTA_MIN)
                ConfigFileEntry.ts_warn_delta = TS_WARN_DELTA_DEFAULT;

        if(ConfigFileEntry.ts_max_delta < TS_MAX_DELTA_MIN)
                ConfigFileEntry.ts_max_delta = TS_MAX_DELTA_DEFAULT;

        if(ServerInfo.network_name == NULL)
                ServerInfo.network_name = rb_strdup(NETWORK_NAME_DEFAULT);

        if(ServerInfo.ssld_count < 1)
                ServerInfo.ssld_count = 1;

        /* XXX: configurable? */
        ServerInfo.wsockd_count = 1;

        if(!rb_setup_ssl_server(ServerInfo.ssl_cert, ServerInfo.ssl_private_key, ServerInfo.ssl_dh_params, ServerInfo.ssl_cipher_list))
        {
                ilog(L_MAIN, "WARNING: Unable to setup SSL.");
                ircd_ssl_ok = false;
        } else {
                ircd_ssl_ok = true;
                ssld_update_config();
        }

        if(ServerInfo.ssld_count > get_ssld_count())
        {
                int start = ServerInfo.ssld_count - get_ssld_count();
                /* start up additional ssld if needed */
                start_ssldaemon(start);
        }

        if(ServerInfo.wsockd_count > get_wsockd_count())
        {
                int start = ServerInfo.wsockd_count - get_wsockd_count();
                start_wsockd(start);
        }

        /* General conf */
        if (ConfigFileEntry.default_operstring == NULL)
                ConfigFileEntry.default_operstring = rb_strdup("is an IRC operator");

        if (ConfigFileEntry.default_adminstring == NULL)
                ConfigFileEntry.default_adminstring = rb_strdup("is a Server Administrator");

        if (ConfigFileEntry.servicestring == NULL)
                ConfigFileEntry.servicestring = rb_strdup("is a Network Service");

        if (ConfigFileEntry.sasl_service == NULL)
                ConfigFileEntry.sasl_service = rb_strdup("SaslServ");

        /* RFC 1459 says 1 message per 2 seconds on average and bursts of
         * 5 messages are acceptable, so allow at least that.
         */
        if(ConfigFileEntry.client_flood_burst_rate < 5)
                ConfigFileEntry.client_flood_burst_rate = 5;
        if(ConfigFileEntry.client_flood_burst_max < 5)
                ConfigFileEntry.client_flood_burst_max = 5;
        if(ConfigFileEntry.client_flood_message_time >
                        ConfigFileEntry.client_flood_message_num * 2)
                ConfigFileEntry.client_flood_message_time =
                        ConfigFileEntry.client_flood_message_num * 2;

        if((ConfigFileEntry.client_flood_max_lines < CLIENT_FLOOD_MIN) ||
           (ConfigFileEntry.client_flood_max_lines > CLIENT_FLOOD_MAX))
                ConfigFileEntry.client_flood_max_lines = CLIENT_FLOOD_MAX;

        if(!split_users || !split_servers ||
           (!ConfigChannel.no_create_on_split && !ConfigChannel.no_join_on_split))
        {
                rb_event_delete(check_splitmode_ev);
                check_splitmode_ev = NULL;
                splitmode = 0;
                splitchecking = 0;
        }

        CharAttrs['&'] |= CHANPFX_C;
        if (ConfigChannel.disable_local_channels)
                CharAttrs['&'] &= ~CHANPFX_C;

        chantypes_update();
}

/* add_temp_kline()
 *
 * inputs        - pointer to struct ConfItem
 * output        - none
 * Side effects  - links in given struct ConfItem into
 *                 temporary kline link list
 */
void
add_temp_kline(struct ConfItem *aconf)
{
        if(aconf->hold >= rb_current_time() + (10080 * 60))
        {
                rb_dlinkAddAlloc(aconf, &temp_klines[TEMP_WEEK]);
                aconf->port = TEMP_WEEK;
        }
        else if(aconf->hold >= rb_current_time() + (1440 * 60))
        {
                rb_dlinkAddAlloc(aconf, &temp_klines[TEMP_DAY]);
                aconf->port = TEMP_DAY;
        }
        else if(aconf->hold >= rb_current_time() + (60 * 60))
        {
                rb_dlinkAddAlloc(aconf, &temp_klines[TEMP_HOUR]);
                aconf->port = TEMP_HOUR;
        }
        else
        {
                rb_dlinkAddAlloc(aconf, &temp_klines[TEMP_MIN]);
                aconf->port = TEMP_MIN;
        }

        aconf->flags |= CONF_FLAGS_TEMPORARY;
        add_conf_by_address(aconf->host, CONF_KILL, aconf->user, NULL, aconf);
}

/* add_temp_dline()
 *
 * input        - pointer to struct ConfItem
 * output       - none
 * side effects - added to tdline link list and address hash
 */
void
add_temp_dline(struct ConfItem *aconf)
{
        if(aconf->hold >= rb_current_time() + (10080 * 60))
        {
                rb_dlinkAddAlloc(aconf, &temp_dlines[TEMP_WEEK]);
                aconf->port = TEMP_WEEK;
        }
        else if(aconf->hold >= rb_current_time() + (1440 * 60))
        {
                rb_dlinkAddAlloc(aconf, &temp_dlines[TEMP_DAY]);
                aconf->port = TEMP_DAY;
        }
        else if(aconf->hold >= rb_current_time() + (60 * 60))
        {
                rb_dlinkAddAlloc(aconf, &temp_dlines[TEMP_HOUR]);
                aconf->port = TEMP_HOUR;
        }
        else
        {
                rb_dlinkAddAlloc(aconf, &temp_dlines[TEMP_MIN]);
                aconf->port = TEMP_MIN;
        }

        aconf->flags |= CONF_FLAGS_TEMPORARY;
        add_conf_by_address(aconf->host, CONF_DLINE, aconf->user, NULL, aconf);
}

/* valid_wild_card()
 *
 * input        - user buffer, host buffer
 * output       - 0 if invalid, 1 if valid
 * side effects -
 */
int
valid_wild_card(const char *luser, const char *lhost)
{
        const char *p;
        char tmpch;
        int nonwild = 0;
        int bitlen;

        /* user has no wildcards, always accept -- jilles */
        if(!strchr(luser, '?') && !strchr(luser, '*'))
                return 1;

        /* check there are enough non wildcard chars */
        p = luser;
        while((tmpch = *p++))
        {
                if(!IsKWildChar(tmpch))
                {
                        /* found enough chars, return */
                        if(++nonwild >= ConfigFileEntry.min_nonwildcard)
                                return 1;
                }
        }

        /* try host, as user didnt contain enough */
        /* special case for cidr masks -- jilles */
        if((p = strrchr(lhost, '/')) != NULL && IsDigit(p[1]))
        {
                bitlen = atoi(p + 1);
                /* much like non-cidr for ipv6, rather arbitrary for ipv4 */
                if(bitlen > 0
                   && bitlen >=
                   (strchr(lhost, ':') ? 4 * (ConfigFileEntry.min_nonwildcard - nonwild) : 6 -
                    2 * nonwild))
                        return 1;
        }
        else
        {
                p = lhost;
                while((tmpch = *p++))
                {
                        if(!IsKWildChar(tmpch))
                                if(++nonwild >= ConfigFileEntry.min_nonwildcard)
                                        return 1;
                }
        }

        return 0;
}

rb_dlink_node *
find_prop_ban(unsigned int status, const char *user, const char *host)
{
        rb_dlink_node *ptr;
        struct ConfItem *aconf;

        RB_DLINK_FOREACH(ptr, prop_bans.head)
        {
                aconf = ptr->data;

                if((aconf->status & ~CONF_ILLEGAL) == status &&
                                (!user || !aconf->user ||
                                 !irccmp(aconf->user, user)) &&
                                !irccmp(aconf->host, host))
                        return ptr;
        }
        return NULL;
}

void
deactivate_conf(struct ConfItem *aconf, rb_dlink_node *ptr, time_t now)
{
        int i;

        s_assert(ptr->data == aconf);

        switch (aconf->status)
        {
                case CONF_KILL:
                        if (aconf->lifetime == 0 &&
                                        aconf->flags & CONF_FLAGS_TEMPORARY)
                                for (i = 0; i < LAST_TEMP_TYPE; i++)
                                        rb_dlinkFindDestroy(aconf, &temp_klines[i]);
                        /* Make sure delete_one_address_conf() does not
                         * free the aconf.
                         */
                        aconf->clients++;
                        delete_one_address_conf(aconf->host, aconf);
                        aconf->clients--;
                        break;
                case CONF_DLINE:
                        if (aconf->lifetime == 0 &&
                                        aconf->flags & CONF_FLAGS_TEMPORARY)
                                for (i = 0; i < LAST_TEMP_TYPE; i++)
                                        rb_dlinkFindDestroy(aconf, &temp_dlines[i]);
                        aconf->clients++;
                        delete_one_address_conf(aconf->host, aconf);
                        aconf->clients--;
                        break;
                case CONF_XLINE:
                        rb_dlinkFindDestroy(aconf, &xline_conf_list);
                        break;
                case CONF_RESV_NICK:
                        rb_dlinkFindDestroy(aconf, &resv_conf_list);
                        break;
                case CONF_RESV_CHANNEL:
                        del_from_resv_hash(aconf->host, aconf);
                        break;
        }
        if (aconf->lifetime != 0 && now < aconf->lifetime)
        {
                aconf->status |= CONF_ILLEGAL;
        }
        else
        {
                if (aconf->lifetime != 0)
                        rb_dlinkDestroy(ptr, &prop_bans);
                if (aconf->clients == 0)
                        free_conf(aconf);
                else
                        aconf->status |= CONF_ILLEGAL;
        }
}

/* Given a new ban ConfItem, look for any matching ban, update the lifetime
 * from it and delete it.
 */
void
replace_old_ban(struct ConfItem *aconf)
{
        rb_dlink_node *ptr;
        struct ConfItem *oldconf;

        ptr = find_prop_ban(aconf->status, aconf->user, aconf->host);
        if(ptr != NULL)
        {
                oldconf = ptr->data;
                /* Remember at least as long as the old one. */
                if(oldconf->lifetime > aconf->lifetime)
                        aconf->lifetime = oldconf->lifetime;
                /* Force creation time to increase. */
                if(oldconf->created >= aconf->created)
                        aconf->created = oldconf->created + 1;
                /* Leave at least one second of validity. */
                if(aconf->hold <= aconf->created)
                        aconf->hold = aconf->created + 1;
                if(aconf->lifetime < aconf->hold)
                        aconf->lifetime = aconf->hold;
                /* Tell deactivate_conf() to destroy it. */
                oldconf->lifetime = rb_current_time();
                deactivate_conf(oldconf, ptr, oldconf->lifetime);
        }
}

static void
expire_prop_bans(void *list)
{
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        struct ConfItem *aconf;
        time_t now;

        now = rb_current_time();
        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, ((rb_dlink_list *) list)->head)
        {
                aconf = ptr->data;

                if(aconf->lifetime <= now ||
                                (aconf->hold <= now &&
                                 !(aconf->status & CONF_ILLEGAL)))
                {
                        /* Alert opers that a TKline expired - Hwy */
                        /* XXX show what type of ban it is */
                        if(ConfigFileEntry.tkline_expire_notices &&
                                        !(aconf->status & CONF_ILLEGAL))
                                sendto_realops_snomask(SNO_GENERAL, L_ALL,
                                                     "Propagated ban for [%s%s%s] expired",
                                                     aconf->user ? aconf->user : "",
                                                     aconf->user ? "@" : "",
                                                     aconf->host ? aconf->host : "*");

                        /* will destroy or mark illegal */
                        deactivate_conf(aconf, ptr, now);
                }
        }
}

/* expire_tkline()
 *
 * inputs       - list pointer
 *              - type
 * output       - NONE
 * side effects - expire tklines and moves them between lists
 */
static void
expire_temp_kd(void *list)
{
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;
        struct ConfItem *aconf;

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, ((rb_dlink_list *) list)->head)
        {
                aconf = ptr->data;

                if(aconf->hold <= rb_current_time())
                {
                        /* Alert opers that a TKline expired - Hwy */
                        if(ConfigFileEntry.tkline_expire_notices)
                                sendto_realops_snomask(SNO_GENERAL, L_ALL,
                                                     "Temporary K-line for [%s@%s] expired",
                                                     (aconf->user) ? aconf->
                                                     user : "*", (aconf->host) ? aconf->host : "*");

                        delete_one_address_conf(aconf->host, aconf);
                        rb_dlinkDestroy(ptr, list);
                }
        }
}

static void
reorganise_temp_kd(void *list)
{
        struct ConfItem *aconf;
        rb_dlink_node *ptr, *next_ptr;

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, ((rb_dlink_list *) list)->head)
        {
                aconf = ptr->data;

                if(aconf->hold < (rb_current_time() + (60 * 60)))
                {
                        rb_dlinkMoveNode(ptr, list, (aconf->status == CONF_KILL) ?
                                        &temp_klines[TEMP_MIN] : &temp_dlines[TEMP_MIN]);
                        aconf->port = TEMP_MIN;
                }
                else if(aconf->port > TEMP_HOUR)
                {
                        if(aconf->hold < (rb_current_time() + (1440 * 60)))
                        {
                                rb_dlinkMoveNode(ptr, list, (aconf->status == CONF_KILL) ?
                                                &temp_klines[TEMP_HOUR] : &temp_dlines[TEMP_HOUR]);
                                aconf->port = TEMP_HOUR;
                        }
                        else if(aconf->port > TEMP_DAY &&
                                (aconf->hold < (rb_current_time() + (10080 * 60))))
                        {
                                rb_dlinkMoveNode(ptr, list, (aconf->status == CONF_KILL) ?
                                                &temp_klines[TEMP_DAY] : &temp_dlines[TEMP_DAY]);
                                aconf->port = TEMP_DAY;
                        }
                }
        }
}


/* const char* get_oper_name(struct Client *client_p)
 * Input: A client to find the active oper{} name for.
 * Output: The nick!user@host{oper} of the oper.
 *         "oper" is server name for unknown opers
 * Side effects: None.
 */
const char *
get_oper_name(struct Client *client_p)
{
        /* +5 for !,@,{,} and null */
        static char buffer[NAMELEN + USERLEN + HOSTLEN + MAX(HOSTLEN, OPERNICKLEN) + 5];

        const char *opername = EmptyString(client_p->user->opername)
                        ? client_p->servptr->name
                        : client_p->user->opername;

        snprintf(buffer, sizeof buffer, "%s!%s@%s{%s}",
                        client_p->name, client_p->username,
                        client_p->host, opername);
        return buffer;
}

/*
 * get_printable_conf
 *
 * inputs        - struct ConfItem
 *
 * output         - name
 *                - host
 *                - pass
 *                - user
 *                - port
 *
 * side effects        -
 * Examine the struct struct ConfItem, setting the values
 * of name, host, pass, user to values either
 * in aconf, or "<NULL>" port is set to aconf->port in all cases.
 */
void
get_printable_conf(struct ConfItem *aconf, char **name, char **host,
                   const char **pass, char **user, int *port, char **classname)
{
        static char null[] = "<NULL>";
        static char zero[] = "default";

        *name = EmptyString(aconf->info.name) ? null : aconf->info.name;
        *host = EmptyString(aconf->host) ? null : aconf->host;
        *pass = EmptyString(aconf->passwd) ? null : aconf->passwd;
        *user = EmptyString(aconf->user) ? null : aconf->user;
        *classname = EmptyString(aconf->className) ? zero : aconf->className;
        *port = (int) aconf->port;
}

char *
get_user_ban_reason(struct ConfItem *aconf)
{
        static char reasonbuf[BUFSIZE];

        if (!ConfigFileEntry.hide_tkdline_duration &&
                        aconf->flags & CONF_FLAGS_TEMPORARY &&
                        (aconf->status == CONF_KILL || aconf->status == CONF_DLINE))
                snprintf(reasonbuf, sizeof reasonbuf,
                                "Temporary %c-line %d min. - ",
                                aconf->status == CONF_DLINE ? 'D' : 'K',
                                (int)((aconf->hold - aconf->created) / 60));
        else
                reasonbuf[0] = '\0';
        if (aconf->passwd)
                rb_strlcat(reasonbuf, aconf->passwd, sizeof reasonbuf);
        else
                rb_strlcat(reasonbuf, "No Reason", sizeof reasonbuf);
        if (aconf->created)
        {
                rb_strlcat(reasonbuf, " (", sizeof reasonbuf);
                rb_strlcat(reasonbuf, smalldate(aconf->created),
                                sizeof reasonbuf);
                rb_strlcat(reasonbuf, ")", sizeof reasonbuf);
        }
        return reasonbuf;
}

void
get_printable_kline(struct Client *source_p, struct ConfItem *aconf,
                    char **host, char **reason,
                    char **user, char **oper_reason)
{
        static char null[] = "<NULL>";
        static char operreasonbuf[BUFSIZE];

        *host = EmptyString(aconf->host) ? null : aconf->host;
        *user = EmptyString(aconf->user) ? null : aconf->user;
        *reason = get_user_ban_reason(aconf);

        if(!IsOperGeneral(source_p))
                *oper_reason = NULL;
        else
        {
                snprintf(operreasonbuf, sizeof operreasonbuf, "%s%s(%s)",
                                EmptyString(aconf->spasswd) ? "" : aconf->spasswd,
                                EmptyString(aconf->spasswd) ? "" : " ",
                                aconf->info.oper);
                *oper_reason = operreasonbuf;
        }
}

/*
 * read_conf_files
 *
 * inputs       - cold start
 * output       - none
 * side effects - read all conf files needed, ircd.conf kline.conf etc.
 */
void
read_conf_files(bool cold)
{
        const char *filename;

        conf_fbfile_in = NULL;

        filename = ConfigFileEntry.configfile;

        /* We need to know the initial filename for the yyerror() to report
           FIXME: The full path is in conffilenamebuf first time since we
           dont know anything else

           - Gozem 2002-07-21


         */
        rb_strlcpy(conffilebuf, filename, sizeof(conffilebuf));

        if((conf_fbfile_in = fopen(filename, "r")) == NULL)
        {
                if(cold)
                {
                        inotice("Failed in reading configuration file %s, aborting", filename);
                        ilog(L_MAIN, "Failed in reading configuration file %s", filename);

                        int e;
                        e = errno;

                        inotice("FATAL: %s %s", strerror(e), filename);
                        ilog(L_MAIN, "FATAL: %s %s", strerror(e), filename);

                        exit(-1);
                }
                else
                {
                        sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
                                             "Can't open file '%s' - aborting rehash!", filename);
                        return;
                }
        }

        if(!cold)
        {
                clear_out_old_conf();
        }

        call_hook(h_conf_read_start, NULL);
        read_conf();
        call_hook(h_conf_read_end, NULL);

        fclose(conf_fbfile_in);
}

/*
 * free an alias{} entry.
 */
static void
free_alias_cb(rb_dictionary_element *ptr, void *unused)
{
        struct alias_entry *aptr = ptr->data;

        rb_free(aptr->name);
        rb_free(aptr->target);
        rb_free(aptr);
}

/*
 * clear_out_old_conf
 *
 * inputs       - none
 * output       - none
 * side effects - Clear out the old configuration
 */
static void
clear_out_old_conf(void)
{
        struct Class *cltmp;
        rb_dlink_node *ptr;
        rb_dlink_node *next_ptr;

        /*
         * don't delete the class table, rather mark all entries
         * for deletion. The table is cleaned up by check_class. - avalon
         */
        RB_DLINK_FOREACH(ptr, class_list.head)
        {
                cltmp = ptr->data;
                MaxUsers(cltmp) = -1;
        }

        clear_out_address_conf(AC_CONFIG);
        clear_s_newconf();

        /* clean out module paths */
        mod_clear_paths();
        mod_add_path(MODULE_DIR);
        mod_add_path(MODULE_DIR  "/autoload");

        /* clean out ServerInfo */
        rb_free(ServerInfo.description);
        ServerInfo.description = NULL;
        rb_free(ServerInfo.network_name);
        ServerInfo.network_name = NULL;

        ServerInfo.ssld_count = 1;

        /* clean out AdminInfo */
        rb_free(AdminInfo.name);
        AdminInfo.name = NULL;
        rb_free(AdminInfo.email);
        AdminInfo.email = NULL;
        rb_free(AdminInfo.description);
        AdminInfo.description = NULL;

        /* operator{} and class{} blocks are freed above */
        /* clean out listeners */
        close_listeners();

        /* auth{}, quarantine{}, shared{}, connect{}, kill{}, deny{}, exempt{}
         * and gecos{} blocks are freed above too
         */

        /* clean out general */
        rb_free(ConfigFileEntry.default_operstring);
        ConfigFileEntry.default_operstring = NULL;
        rb_free(ConfigFileEntry.default_adminstring);
        ConfigFileEntry.default_adminstring = NULL;
        rb_free(ConfigFileEntry.servicestring);
        ConfigFileEntry.servicestring = NULL;
        rb_free(ConfigFileEntry.kline_reason);
        ConfigFileEntry.kline_reason = NULL;
        rb_free(ConfigFileEntry.sasl_service);
        ConfigFileEntry.sasl_service = NULL;
        rb_free(ConfigFileEntry.drain_reason);
        ConfigFileEntry.drain_reason = NULL;

        if (ConfigFileEntry.hidden_caps != NULL)
        {
                for (size_t i = 0; ConfigFileEntry.hidden_caps[i] != NULL; i++)
                        rb_free(ConfigFileEntry.hidden_caps[i]);
                rb_free(ConfigFileEntry.hidden_caps);
        }
        ConfigFileEntry.hidden_caps = NULL;

        /* clean out log */
        rb_free(ConfigFileEntry.fname_userlog);
        ConfigFileEntry.fname_userlog = NULL;
        rb_free(ConfigFileEntry.fname_fuserlog);
        ConfigFileEntry.fname_fuserlog = NULL;
        rb_free(ConfigFileEntry.fname_operlog);
        ConfigFileEntry.fname_operlog = NULL;
        rb_free(ConfigFileEntry.fname_foperlog);
        ConfigFileEntry.fname_foperlog = NULL;
        rb_free(ConfigFileEntry.fname_serverlog);
        ConfigFileEntry.fname_serverlog = NULL;
        rb_free(ConfigFileEntry.fname_killlog);
        ConfigFileEntry.fname_killlog = NULL;
        rb_free(ConfigFileEntry.fname_klinelog);
        ConfigFileEntry.fname_klinelog = NULL;
        rb_free(ConfigFileEntry.fname_operspylog);
        ConfigFileEntry.fname_operspylog = NULL;
        rb_free(ConfigFileEntry.fname_ioerrorlog);
        ConfigFileEntry.fname_ioerrorlog = NULL;

        RB_DLINK_FOREACH_SAFE(ptr, next_ptr, service_list.head)
        {
                rb_free(ptr->data);
                rb_dlinkDestroy(ptr, &service_list);
        }

        /* remove any aliases... -- nenolod */
        if (alias_dict != NULL)
        {
                rb_dictionary_destroy(alias_dict, free_alias_cb, NULL);
                alias_dict = NULL;
        }

        del_dnsbl_entry_all();

        privilegeset_mark_all_illegal();

        /* OK, that should be everything... */
}


/*
 * conf_add_class_to_conf
 * inputs       - pointer to config item
 * output       - NONE
 * side effects - Add a class pointer to a conf
 */

void
conf_add_class_to_conf(struct ConfItem *aconf)
{
        if(aconf->className == NULL)
        {
                aconf->className = rb_strdup("default");
                ClassPtr(aconf) = default_class;
                return;
        }

        ClassPtr(aconf) = find_class(aconf->className);

        if(ClassPtr(aconf) == default_class)
        {
                if(aconf->status == CONF_CLIENT)
                {
                        conf_report_error(
                                             "Using default class for missing class \"%s\" in auth{} for %s@%s",
                                             aconf->className, aconf->user, aconf->host);
                }

                rb_free(aconf->className);
                aconf->className = rb_strdup("default");
                return;
        }

        if(ConfMaxUsers(aconf) < 0)
        {
                ClassPtr(aconf) = default_class;
                rb_free(aconf->className);
                aconf->className = rb_strdup("default");
                return;
        }
}

/*
 * conf_add_d_conf
 * inputs       - pointer to config item
 * output       - NONE
 * side effects - Add a d/D line
 */
void
conf_add_d_conf(struct ConfItem *aconf)
{
        if(aconf->host == NULL)
                return;

        aconf->user = NULL;

        /* XXX - Should 'd' ever be in the old conf? For new conf we don't
         *       need this anyway, so I will disable it for now... -A1kmm
         */

        if(parse_netmask(aconf->host, NULL, NULL) == HM_HOST)
        {
                ilog(L_MAIN, "Invalid Dline %s ignored", aconf->host);
                free_conf(aconf);
        }
        else
        {
                add_conf_by_address(aconf->host, CONF_DLINE, NULL, NULL, aconf);
        }
}

static void
strip_tabs(char *dest, const char *src, size_t size)
{
        char *d = dest;

        if(dest == NULL || src == NULL)
                return;

        rb_strlcpy(dest, src, size);

        while(*d)
        {
                if(*d == '\t')
                        *d = ' ';
                d++;
        }
}

/*
 * yyerror
 *
 * inputs       - message from parser
 * output       - none
 * side effects - message to opers and log file entry is made
 */
void
yyerror(const char *msg)
{
        char newlinebuf[BUFSIZE];

        strip_tabs(newlinebuf, yy_linebuf, sizeof(newlinebuf));

        ierror("\"%s\", line %d: %s at '%s'", conffilebuf, lineno + 1, msg, newlinebuf);
        sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "\"%s\", line %d: %s at '%s'",
                             conffilebuf, lineno + 1, msg, newlinebuf);

}

int
conf_fgets(char *lbuf, int max_size, FILE * fb)
{
        if(fgets(lbuf, max_size, fb) == NULL)
                return (0);

        return (strlen(lbuf));
}

int
conf_yy_fatal_error(const char *msg)
{
        return (0);
}