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/**
 * This file is part of Hercules.
 * http://herc.ws - http://github.com/HerculesWS/Hercules
 *
 * Copyright (C) 2012-2016  Hercules Dev Team
 * Copyright (C)  Athena Dev Teams
 *
 * Hercules 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 3 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, see <http://www.gnu.org/licenses/>.
 */
#define HERCULES_CORE
 
#include "login.h"
 
#include "login/HPMlogin.h"
#include "login/account.h"
#include "login/ipban.h"
#include "login/loginlog.h"
#include "login/lclif.h"
#include "common/HPM.h"
#include "common/cbasetypes.h"
#include "common/core.h"
#include "common/db.h"
#include "common/memmgr.h"
#include "common/md5calc.h"
#include "common/nullpo.h"
#include "common/random.h"
#include "common/showmsg.h"
#include "common/socket.h"
#include "common/strlib.h"
#include "common/timer.h"
#include "common/utils.h"
 
#include <stdio.h>
#include <stdlib.h>
 
/** @file
 * Implementation of the login interface.
 */
 
struct login_interface login_s;
struct login_interface *login;
struct Login_Config login_config_;
struct mmo_char_server server[MAX_SERVERS]; // char server data
 
struct Account_engine account_engine[] = {
        {account_db_sql, NULL}
};
 
// account database
AccountDB* accounts = NULL;
 
//-----------------------------------------------------
// Auth database
//-----------------------------------------------------
#define AUTH_TIMEOUT 30000
 
/**
 * @see DBCreateData
 */
static struct DBData login_create_online_user(union DBKey key, va_list args)
{
        struct online_login_data* p;
        CREATE(p, struct online_login_data, 1);
        p->account_id = key.i;
        p->char_server = -1;
        p->waiting_disconnect = INVALID_TIMER;
        return DB->ptr2data(p);
}
 
struct online_login_data* login_add_online_user(int char_server, int account_id)
{
        struct online_login_data* p;
        p = idb_ensure(login->online_db, account_id, login->create_online_user);
        p->char_server = char_server;
        if( p->waiting_disconnect != INVALID_TIMER )
        {
                timer->delete(p->waiting_disconnect, login->waiting_disconnect_timer);
                p->waiting_disconnect = INVALID_TIMER;
        }
        return p;
}
 
void login_remove_online_user(int account_id)
{
        struct online_login_data* p;
        p = (struct online_login_data*)idb_get(login->online_db, account_id);
        if( p == NULL )
                return;
        if( p->waiting_disconnect != INVALID_TIMER )
                timer->delete(p->waiting_disconnect, login->waiting_disconnect_timer);
 
        idb_remove(login->online_db, account_id);
}
 
static int login_waiting_disconnect_timer(int tid, int64 tick, int id, intptr_t data) {
        struct online_login_data* p = (struct online_login_data*)idb_get(login->online_db, id);
        if( p != NULL && p->waiting_disconnect == tid && p->account_id == id )
        {
                p->waiting_disconnect = INVALID_TIMER;
                login->remove_online_user(id);
                idb_remove(login->auth_db, id);
        }
        return 0;
}
 
/**
 * @see DBApply
 */
static int login_online_db_setoffline(union DBKey key, struct DBData *data, va_list ap)
{
        struct online_login_data* p = DB->data2ptr(data);
        int server_id = va_arg(ap, int);
        nullpo_ret(p);
        if( server_id == -1 )
        {
                p->char_server = -1;
                if( p->waiting_disconnect != INVALID_TIMER )
                {
                        timer->delete(p->waiting_disconnect, login->waiting_disconnect_timer);
                        p->waiting_disconnect = INVALID_TIMER;
                }
        }
        else if( p->char_server == server_id )
                p->char_server = -2; //Char server disconnected.
        return 0;
}
 
/**
 * @see DBApply
 */
static int login_online_data_cleanup_sub(union DBKey key, struct DBData *data, va_list ap)
{
        struct online_login_data *character= DB->data2ptr(data);
        nullpo_ret(character);
        if (character->char_server == -2) //Unknown server.. set them offline
                login->remove_online_user(character->account_id);
        return 0;
}
 
static int login_online_data_cleanup(int tid, int64 tick, int id, intptr_t data) {
        login->online_db->foreach(login->online_db, login->online_data_cleanup_sub);
        return 0;
}
 
 
//--------------------------------------------------------------------
// Packet send to all char-servers, except one (wos: without our self)
//--------------------------------------------------------------------
int charif_sendallwos(int sfd, uint8* buf, size_t len)
{
        int i, c;
 
        nullpo_ret(buf);
        for( i = 0, c = 0; i < ARRAYLENGTH(server); ++i )
        {
                int fd = server[i].fd;
                if (sockt->session_is_valid(fd) && fd != sfd) {
                        WFIFOHEAD(fd,len);
                        memcpy(WFIFOP(fd,0), buf, len);
                        WFIFOSET(fd,len);
                        ++c;
                }
        }
 
        return c;
}
 
 
/// Initializes a server structure.
void chrif_server_init(int id)
{
        Assert_retv(id >= 0 && id < MAX_SERVERS);
        memset(&server[id], 0, sizeof(server[id]));
        server[id].fd = -1;
}
 
 
/// Destroys a server structure.
void chrif_server_destroy(int id)
{
        Assert_retv(id >= 0 && id < MAX_SERVERS);
        if (server[id].fd != -1)
        {
                sockt->close(server[id].fd);
                server[id].fd = -1;
        }
}
 
 
/// Resets all the data related to a server.
void chrif_server_reset(int id)
{
        login->online_db->foreach(login->online_db, login->online_db_setoffline, id); //Set all chars from this char server to offline.
        chrif_server_destroy(id);
        chrif_server_init(id);
}
 
 
/// Called when the connection to Char Server is disconnected.
void chrif_on_disconnect(int id)
{
        Assert_retv(id >= 0 && id < MAX_SERVERS);
        ShowStatus("Char-server '%s' has disconnected.\n", server[id].name);
        chrif_server_reset(id);
}
 
 
//-----------------------------------------------------
// periodic ip address synchronization
//-----------------------------------------------------
static int login_sync_ip_addresses(int tid, int64 tick, int id, intptr_t data) {
        uint8 buf[2];
        ShowInfo("IP Sync in progress...\n");
        WBUFW(buf,0) = 0x2735;
        charif_sendallwos(-1, buf, 2);
        return 0;
}
 
 
//-----------------------------------------------------
// encrypted/unencrypted password check (from eApp)
//-----------------------------------------------------
bool login_check_encrypted(const char* str1, const char* str2, const char* passwd)
{
        char tmpstr[64+1], md5str[32+1];
 
        nullpo_ret(str1);
        nullpo_ret(str2);
        nullpo_ret(passwd);
        safesnprintf(tmpstr, sizeof(tmpstr), "%s%s", str1, str2);
        MD5_String(tmpstr, md5str);
 
        return (0==strcmp(passwd, md5str));
}
 
bool login_check_password(const char* md5key, int passwdenc, const char* passwd, const char* refpass)
{
        nullpo_ret(passwd);
        nullpo_ret(refpass);
        if(passwdenc == PWENC_NONE) {
                return (0==strcmp(passwd, refpass));
        } else {
                // password mode set to PWENC_ENCRYPT  -> md5(md5key, refpass) enable with <passwordencrypt></passwordencrypt>
                // password mode set to PWENC_ENCRYPT2 -> md5(refpass, md5key) enable with <passwordencrypt2></passwordencrypt2>
 
                return ((passwdenc&PWENC_ENCRYPT) && login->check_encrypted(md5key, refpass, passwd)) ||
                       ((passwdenc&PWENC_ENCRYPT2) && login->check_encrypted(refpass, md5key, passwd));
        }
}
 
 
/**
 * Checks whether the given IP comes from LAN or WAN.
 *
 * @param ip IP address to check.
 * @retval 0 if it is a WAN IP.
 * @return the appropriate LAN server address to send, if it is a LAN IP.
 */
uint32 login_lan_subnet_check(uint32 ip)
{
        return sockt->lan_subnet_check(ip, NULL);
}
 
void login_fromchar_auth_ack(int fd, int account_id, uint32 login_id1, uint32 login_id2, uint8 sex, int request_id, struct login_auth_node* node)
{
        WFIFOHEAD(fd,33);
        WFIFOW(fd,0) = 0x2713;
        WFIFOL(fd,2) = account_id;
        WFIFOL(fd,6) = login_id1;
        WFIFOL(fd,10) = login_id2;
        WFIFOB(fd,14) = sex;
        if (node)
        {
                WFIFOB(fd,15) = 0;// ok
                WFIFOL(fd,16) = request_id;
                WFIFOL(fd,20) = node->version;
                WFIFOB(fd,24) = node->clienttype;
                WFIFOL(fd,25) = node->group_id;
                WFIFOL(fd,29) = (unsigned int)node->expiration_time;
        }
        else
        {
                WFIFOB(fd,15) = 1;// auth failed
                WFIFOL(fd,16) = request_id;
                WFIFOL(fd,20) = 0;
                WFIFOB(fd,24) = 0;
                WFIFOL(fd,25) = 0;
                WFIFOL(fd,29) = 0;
        }
        WFIFOSET(fd,33);
}
 
void login_fromchar_parse_auth(int fd, int id, const char *const ip)
{
        struct login_auth_node* node;
 
        int account_id = RFIFOL(fd,2);
        uint32 login_id1 = RFIFOL(fd,6);
        uint32 login_id2 = RFIFOL(fd,10);
        uint8 sex = RFIFOB(fd,14);
        //uint32 ip_ = ntohl(RFIFOL(fd,15));
        int request_id = RFIFOL(fd,19);
        RFIFOSKIP(fd,23);
 
        node = (struct login_auth_node*)idb_get(login->auth_db, account_id);
        if( core->runflag == LOGINSERVER_ST_RUNNING &&
                node != NULL &&
                node->account_id == account_id &&
                node->login_id1  == login_id1 &&
                node->login_id2  == login_id2 &&
                node->sex        == sex_num2str(sex) /*&&
                node->ip         == ip_*/ )
        {// found
                //ShowStatus("Char-server '%s': authentication of the account %d accepted (ip: %s).\n", server[id].name, account_id, ip);
 
                // send ack
                login->fromchar_auth_ack(fd, account_id, login_id1, login_id2, sex, request_id, node);
                // each auth entry can only be used once
                idb_remove(login->auth_db, account_id);
        }
        else
        {// authentication not found
                nullpo_retv(ip);
                ShowStatus("Char-server '%s': authentication of the account %d REFUSED (ip: %s).\n", server[id].name, account_id, ip);
                login->fromchar_auth_ack(fd, account_id, login_id1, login_id2, sex, request_id, NULL);
        }
}
 
void login_fromchar_parse_update_users(int fd, int id)
{
        int users = RFIFOL(fd,2);
        RFIFOSKIP(fd,6);
 
        // how many users on world? (update)
        if( server[id].users != users )
        {
                ShowStatus("set users %s : %d\n", server[id].name, users);
 
                server[id].users = (uint16)users;
        }
}
 
void login_fromchar_parse_request_change_email(int fd, int id, const char *const ip)
{
        struct mmo_account acc;
        char email[40];
 
        int account_id = RFIFOL(fd,2);
        safestrncpy(email, RFIFOP(fd,6), 40); remove_control_chars(email);
        RFIFOSKIP(fd,46);
 
        if( e_mail_check(email) == 0 )
                ShowNotice("Char-server '%s': Attempt to create an e-mail on an account with a default e-mail REFUSED - e-mail is invalid (account: %d, ip: %s)\n", server[id].name, account_id, ip);
        else
        if( !accounts->load_num(accounts, &acc, account_id) || strcmp(acc.email, "[email protected]") == 0 || acc.email[0] == '\0' )
                ShowNotice("Char-server '%s': Attempt to create an e-mail on an account with a default e-mail REFUSED - account doesn't exist or e-mail of account isn't default e-mail (account: %d, ip: %s).\n", server[id].name, account_id, ip);
        else {
                memcpy(acc.email, email, sizeof(acc.email));
                ShowNotice("Char-server '%s': Create an e-mail on an account with a default e-mail (account: %d, new e-mail: %s, ip: %s).\n", server[id].name, account_id, email, ip);
                // Save
                accounts->save(accounts, &acc);
        }
}
 
void login_fromchar_account(int fd, int account_id, struct mmo_account *acc)
{
        WFIFOHEAD(fd,72);
        WFIFOW(fd,0) = 0x2717;
        WFIFOL(fd,2) = account_id;
        if (acc)
        {
                time_t expiration_time = 0;
                char email[40] = "";
                int group_id = 0;
                uint8 char_slots = 0;
                char birthdate[10+1] = "";
                char pincode[4+1] = "\0\0\0\0";
 
                safestrncpy(email, acc->email, sizeof(email));
                expiration_time = acc->expiration_time;
                group_id = acc->group_id;
                char_slots = acc->char_slots;
                safestrncpy(pincode, acc->pincode, sizeof(pincode));
                safestrncpy(birthdate, acc->birthdate, sizeof(birthdate));
                if (pincode[0] == '\0')
                        memset(pincode,'\0',sizeof(pincode));
 
                safestrncpy(WFIFOP(fd,6), email, 40);
                WFIFOL(fd,46) = (uint32)expiration_time;
                WFIFOB(fd,50) = (unsigned char)group_id;
                WFIFOB(fd,51) = char_slots;
                safestrncpy(WFIFOP(fd,52), birthdate, 10+1);
                safestrncpy(WFIFOP(fd,63), pincode, 4+1 );
                WFIFOL(fd,68) = acc->pincode_change;
        }
        else
        {
                safestrncpy(WFIFOP(fd,6), "", 40);
                WFIFOL(fd,46) = 0;
                WFIFOB(fd,50) = 0;
                WFIFOB(fd,51) = 0;
                safestrncpy(WFIFOP(fd,52), "", 10+1);
                safestrncpy(WFIFOP(fd,63), "\0\0\0\0", 4+1 );
                WFIFOL(fd,68) = 0;
        }
        WFIFOSET(fd,72);
}
 
void login_fromchar_parse_account_data(int fd, int id, const char *const ip)
{
        struct mmo_account acc;
 
        int account_id = RFIFOL(fd,2);
        RFIFOSKIP(fd,6);
 
        if( !accounts->load_num(accounts, &acc, account_id) )
        {
                ShowNotice("Char-server '%s': account %d NOT found (ip: %s).\n", server[id].name, account_id, ip);
                login->fromchar_account(fd, account_id, NULL);
        }
        else {
                login->fromchar_account(fd, account_id, &acc);
        }
}
 
void login_fromchar_pong(int fd)
{
        WFIFOHEAD(fd,2);
        WFIFOW(fd,0) = 0x2718;
        WFIFOSET(fd,2);
}
 
void login_fromchar_parse_ping(int fd)
{
        RFIFOSKIP(fd,2);
        login->fromchar_pong(fd);
}
 
void login_fromchar_parse_change_email(int fd, int id, const char *const ip)
{
        struct mmo_account acc;
        char actual_email[40];
        char new_email[40];
 
        int account_id = RFIFOL(fd,2);
        safestrncpy(actual_email, RFIFOP(fd,6), 40);
        safestrncpy(new_email, RFIFOP(fd,46), 40);
        RFIFOSKIP(fd, 86);
 
        if( e_mail_check(actual_email) == 0 )
                ShowNotice("Char-server '%s': Attempt to modify an e-mail on an account (@email GM command), but actual email is invalid (account: %d, ip: %s)\n", server[id].name, account_id, ip);
        else
        if( e_mail_check(new_email) == 0 )
                ShowNotice("Char-server '%s': Attempt to modify an e-mail on an account (@email GM command) with a invalid new e-mail (account: %d, ip: %s)\n", server[id].name, account_id, ip);
        else
        if( strcmpi(new_email, "[email protected]") == 0 )
                ShowNotice("Char-server '%s': Attempt to modify an e-mail on an account (@email GM command) with a default e-mail (account: %d, ip: %s)\n", server[id].name, account_id, ip);
        else
        if( !accounts->load_num(accounts, &acc, account_id) )
                ShowNotice("Char-server '%s': Attempt to modify an e-mail on an account (@email GM command), but account doesn't exist (account: %d, ip: %s).\n", server[id].name, account_id, ip);
        else
        if( strcmpi(acc.email, actual_email) != 0 )
                ShowNotice("Char-server '%s': Attempt to modify an e-mail on an account (@email GM command), but actual e-mail is incorrect (account: %d (%s), actual e-mail: %s, proposed e-mail: %s, ip: %s).\n", server[id].name, account_id, acc.userid, acc.email, actual_email, ip);
        else {
                safestrncpy(acc.email, new_email, sizeof(acc.email));
                ShowNotice("Char-server '%s': Modify an e-mail on an account (@email GM command) (account: %d (%s), new e-mail: %s, ip: %s).\n", server[id].name, account_id, acc.userid, new_email, ip);
                // Save
                accounts->save(accounts, &acc);
        }
}
 
void login_fromchar_account_update_other(int account_id, unsigned int state)
{
        uint8 buf[11];
        WBUFW(buf,0) = 0x2731;
        WBUFL(buf,2) = account_id;
        WBUFB(buf,6) = 0; // 0: change of state, 1: ban
        WBUFL(buf,7) = state; // status or final date of a banishment
        charif_sendallwos(-1, buf, 11);
}
 
void login_fromchar_parse_account_update(int fd, int id, const char *const ip)
{
        struct mmo_account acc;
 
        int account_id = RFIFOL(fd,2);
        unsigned int state = RFIFOL(fd,6);
        RFIFOSKIP(fd,10);
 
        if( !accounts->load_num(accounts, &acc, account_id) )
                ShowNotice("Char-server '%s': Error of Status change (account: %d not found, suggested status %u, ip: %s).\n", server[id].name, account_id, state, ip);
        else
        if( acc.state == state )
                ShowNotice("Char-server '%s':  Error of Status change - actual status is already the good status (account: %d, status %u, ip: %s).\n", server[id].name, account_id, state, ip);
        else {
                ShowNotice("Char-server '%s': Status change (account: %d, new status %u, ip: %s).\n", server[id].name, account_id, state, ip);
 
                acc.state = state;
                // Save
                accounts->save(accounts, &acc);
 
                // notify other servers
                if (state != 0) {
                        login->fromchar_account_update_other(account_id, state);
                }
        }
}
 
void login_fromchar_ban(int account_id, time_t timestamp)
{
        uint8 buf[11];
        WBUFW(buf,0) = 0x2731;
        WBUFL(buf,2) = account_id;
        WBUFB(buf,6) = 1; // 0: change of status, 1: ban
        WBUFL(buf,7) = (uint32)timestamp; // status or final date of a banishment
        charif_sendallwos(-1, buf, 11);
}
 
void login_fromchar_parse_ban(int fd, int id, const char *const ip)
{
        struct mmo_account acc;
 
        int account_id = RFIFOL(fd,2);
        int year = RFIFOW(fd,6);
        int month = RFIFOW(fd,8);
        int mday = RFIFOW(fd,10);
        int hour = RFIFOW(fd,12);
        int min = RFIFOW(fd,14);
        int sec = RFIFOW(fd,16);
        RFIFOSKIP(fd,18);
 
        if (!accounts->load_num(accounts, &acc, account_id)) {
                ShowNotice("Char-server '%s': Error of ban request (account: %d not found, ip: %s).\n", server[id].name, account_id, ip);
        } else {
                time_t timestamp;
                struct tm *tmtime;
                if (acc.unban_time == 0 || acc.unban_time < time(NULL))
                        timestamp = time(NULL); // new ban
                else
                        timestamp = acc.unban_time; // add to existing ban
                tmtime = localtime(&timestamp);
                tmtime->tm_year += year;
                tmtime->tm_mon  += month;
                tmtime->tm_mday += mday;
                tmtime->tm_hour += hour;
                tmtime->tm_min  += min;
                tmtime->tm_sec  += sec;
                timestamp = mktime(tmtime);
                if (timestamp == -1) {
                        ShowNotice("Char-server '%s': Error of ban request (account: %d, invalid date, ip: %s).\n", server[id].name, account_id, ip);
                } else if( timestamp <= time(NULL) || timestamp == 0 ) {
                        ShowNotice("Char-server '%s': Error of ban request (account: %d, new date unbans the account, ip: %s).\n", server[id].name, account_id, ip);
                } else {
                        char tmpstr[24];
                        timestamp2string(tmpstr, sizeof(tmpstr), timestamp, login->config->date_format);
                        ShowNotice("Char-server '%s': Ban request (account: %d, new final date of banishment: %ld (%s), ip: %s).\n",
                                   server[id].name, account_id, (long)timestamp, tmpstr, ip);
 
                        acc.unban_time = timestamp;
 
                        // Save
                        accounts->save(accounts, &acc);
 
                        login->fromchar_ban(account_id, timestamp);
                }
        }
}
 
void login_fromchar_change_sex_other(int account_id, char sex)
{
        unsigned char buf[7];
        WBUFW(buf,0) = 0x2723;
        WBUFL(buf,2) = account_id;
        WBUFB(buf,6) = sex_str2num(sex);
        charif_sendallwos(-1, buf, 7);
}
 
void login_fromchar_parse_change_sex(int fd, int id, const char *const ip)
{
        struct mmo_account acc;
 
        int account_id = RFIFOL(fd,2);
        RFIFOSKIP(fd,6);
 
        if( !accounts->load_num(accounts, &acc, account_id) )
                ShowNotice("Char-server '%s': Error of sex change (account: %d not found, ip: %s).\n", server[id].name, account_id, ip);
        else
        if( acc.sex == 'S' )
                ShowNotice("Char-server '%s': Error of sex change - account to change is a Server account (account: %d, ip: %s).\n", server[id].name, account_id, ip);
        else
        {
                char sex = ( acc.sex == 'M' ) ? 'F' : 'M'; //Change gender
 
                ShowNotice("Char-server '%s': Sex change (account: %d, new sex %c, ip: %s).\n", server[id].name, account_id, sex, ip);
 
                acc.sex = sex;
                // Save
                accounts->save(accounts, &acc);
 
                // announce to other servers
                login->fromchar_change_sex_other(account_id, sex);
        }
}
 
void login_fromchar_parse_account_reg2(int fd, int id, const char *const ip)
{
        struct mmo_account acc;
 
        int account_id = RFIFOL(fd,4);
 
        if( !accounts->load_num(accounts, &acc, account_id) )
                ShowStatus("Char-server '%s': receiving (from the char-server) of account_reg2 (account: %d not found, ip: %s).\n", server[id].name, account_id, ip);
        else {
                mmo_save_accreg2(accounts,fd,account_id,RFIFOL(fd, 8));
        }
        RFIFOSKIP(fd,RFIFOW(fd,2));
}
 
void login_fromchar_parse_unban(int fd, int id, const char *const ip)
{
        struct mmo_account acc;
 
        int account_id = RFIFOL(fd,2);
        RFIFOSKIP(fd,6);
 
        if( !accounts->load_num(accounts, &acc, account_id) )
                ShowNotice("Char-server '%s': Error of Unban request (account: %d not found, ip: %s).\n", server[id].name, account_id, ip);
        else
        if( acc.unban_time == 0 )
                ShowNotice("Char-server '%s': Error of Unban request (account: %d, no change for unban date, ip: %s).\n", server[id].name, account_id, ip);
        else
        {
                ShowNotice("Char-server '%s': Unban request (account: %d, ip: %s).\n", server[id].name, account_id, ip);
                acc.unban_time = 0;
                accounts->save(accounts, &acc);
        }
}
 
void login_fromchar_parse_account_online(int fd, int id)
{
        login->add_online_user(id, RFIFOL(fd,2));
        RFIFOSKIP(fd,6);
}
 
void login_fromchar_parse_account_offline(int fd)
{
        login->remove_online_user(RFIFOL(fd,2));
        RFIFOSKIP(fd,6);
}
 
void login_fromchar_parse_online_accounts(int fd, int id)
{
        uint32 i, users;
        login->online_db->foreach(login->online_db, login->online_db_setoffline, id); //Set all chars from this char-server offline first
        users = RFIFOW(fd,4);
        for (i = 0; i < users; i++) {
                int aid = RFIFOL(fd,6+i*4);
                struct online_login_data *p = idb_ensure(login->online_db, aid, login->create_online_user);
                p->char_server = id;
                if (p->waiting_disconnect != INVALID_TIMER)
                {
                        timer->delete(p->waiting_disconnect, login->waiting_disconnect_timer);
                        p->waiting_disconnect = INVALID_TIMER;
                }
        }
}
 
void login_fromchar_parse_request_account_reg2(int fd)
{
        int account_id = RFIFOL(fd,2);
        int char_id = RFIFOL(fd,6);
        RFIFOSKIP(fd,10);
 
        mmo_send_accreg2(accounts,fd,account_id,char_id);
}
 
void login_fromchar_parse_update_wan_ip(int fd, int id)
{
        server[id].ip = ntohl(RFIFOL(fd,2));
        ShowInfo("Updated IP of Server #%d to %u.%u.%u.%u.\n",id, CONVIP(server[id].ip));
        RFIFOSKIP(fd,6);
}
 
void login_fromchar_parse_all_offline(int fd, int id)
{
        ShowInfo("Setting accounts from char-server %d offline.\n", id);
        login->online_db->foreach(login->online_db, login->online_db_setoffline, id);
        RFIFOSKIP(fd,2);
}
 
void login_fromchar_parse_change_pincode(int fd)
{
        struct mmo_account acc;
 
        if (accounts->load_num(accounts, &acc, RFIFOL(fd,2))) {
                safestrncpy(acc.pincode, RFIFOP(fd,6), sizeof(acc.pincode));
                acc.pincode_change = ((unsigned int)time(NULL));
                accounts->save(accounts, &acc);
        }
        RFIFOSKIP(fd,11);
}
 
bool login_fromchar_parse_wrong_pincode(int fd)
{
        struct mmo_account acc;
 
        if( accounts->load_num(accounts, &acc, RFIFOL(fd,2) ) ) {
                struct online_login_data* ld = (struct online_login_data*)idb_get(login->online_db,acc.account_id);
 
                if (ld == NULL) {
                        RFIFOSKIP(fd,6);
                        return true;
                }
 
                login_log(fd, sockt->host2ip(acc.last_ip), acc.userid, 100, "PIN Code check failed"); // FIXME: Do we really want to log this with the same code as successful logins?
        }
 
        login->remove_online_user(acc.account_id);
        RFIFOSKIP(fd,6);
        return false;
}
 
void login_fromchar_accinfo(int fd, int account_id, int u_fd, int u_aid, int u_group, int map_fd, struct mmo_account *acc)
{
        if (acc)
        {
                WFIFOHEAD(fd,183);
                WFIFOW(fd,0) = 0x2737;
                safestrncpy(WFIFOP(fd,2), acc->userid, NAME_LENGTH);
                if (u_group >= acc->group_id)
                        safestrncpy(WFIFOP(fd,26), acc->pass, 33);
                else
                        memset(WFIFOP(fd,26), '\0', 33);
                safestrncpy(WFIFOP(fd,59), acc->email, 40);
                safestrncpy(WFIFOP(fd,99), acc->last_ip, 16);
                WFIFOL(fd,115) = acc->group_id;
                safestrncpy(WFIFOP(fd,119), acc->lastlogin, 24);
                WFIFOL(fd,143) = acc->logincount;
                WFIFOL(fd,147) = acc->state;
                if (u_group >= acc->group_id)
                        safestrncpy(WFIFOP(fd,151), acc->pincode, 5);
                else
                        memset(WFIFOP(fd,151), '\0', 5);
                safestrncpy(WFIFOP(fd,156), acc->birthdate, 11);
                WFIFOL(fd,167) = map_fd;
                WFIFOL(fd,171) = u_fd;
                WFIFOL(fd,175) = u_aid;
                WFIFOL(fd,179) = account_id;
                WFIFOSET(fd,183);
        }
        else
        {
                WFIFOHEAD(fd,18);
                WFIFOW(fd,0) = 0x2736;
                WFIFOL(fd,2) = map_fd;
                WFIFOL(fd,6) = u_fd;
                WFIFOL(fd,10) = u_aid;
                WFIFOL(fd,14) = account_id;
                WFIFOSET(fd,18);
        }
}
 
void login_fromchar_parse_accinfo(int fd)
{
        struct mmo_account acc;
        int account_id = RFIFOL(fd, 2), u_fd = RFIFOL(fd, 6), u_aid = RFIFOL(fd, 10), u_group = RFIFOL(fd, 14), map_fd = RFIFOL(fd, 18);
        if (accounts->load_num(accounts, &acc, account_id)) {
                login->fromchar_accinfo(fd, account_id, u_fd, u_aid, u_group, map_fd, &acc);
        } else {
                login->fromchar_accinfo(fd, account_id, u_fd, u_aid, u_group, map_fd, NULL);
        }
        RFIFOSKIP(fd,22);
}
 
//--------------------------------
// Packet parsing for char-servers
//--------------------------------
int login_parse_fromchar(int fd)
{
        int id;
        uint32 ipl;
        char ip[16];
 
        ARR_FIND( 0, ARRAYLENGTH(server), id, server[id].fd == fd );
        if( id == ARRAYLENGTH(server) )
        {// not a char server
                ShowDebug("login_parse_fromchar: Disconnecting invalid session #%d (is not a char-server)\n", fd);
                sockt->eof(fd);
                sockt->close(fd);
                return 0;
        }
 
        if( sockt->session[fd]->flag.eof )
        {
                sockt->close(fd);
                server[id].fd = -1;
                chrif_on_disconnect(id);
                return 0;
        }
 
        ipl = server[id].ip;
        sockt->ip2str(ipl, ip);
 
        while (RFIFOREST(fd) >= 2) {
                uint16 command = RFIFOW(fd,0);
 
                if (VECTOR_LENGTH(HPM->packets[hpParse_FromChar]) > 0) {
                        int result = HPM->parse_packets(fd,command,hpParse_FromChar);
                        if (result == 1)
                                continue;
                        if (result == 2)
                                return 0;
                }
 
                switch (command) {
 
                case 0x2712: // request from char-server to authenticate an account
                        if( RFIFOREST(fd) < 23 )
                                return 0;
                {
                        login->fromchar_parse_auth(fd, id, ip);
                }
                break;
 
                case 0x2714:
                        if( RFIFOREST(fd) < 6 )
                                return 0;
                {
                        login->fromchar_parse_update_users(fd, id);
                }
                break;
 
                case 0x2715: // request from char server to change e-email from default "[email protected]"
                        if (RFIFOREST(fd) < 46)
                                return 0;
                {
                        login->fromchar_parse_request_change_email(fd, id, ip);
                }
                break;
 
                case 0x2716: // request account data
                        if( RFIFOREST(fd) < 6 )
                                return 0;
                {
                        login->fromchar_parse_account_data(fd, id, ip);
                }
                break;
 
                case 0x2719: // ping request from charserver
                        login->fromchar_parse_ping(fd);
                break;
 
                // Map server send information to change an email of an account via char-server
                case 0x2722: // 0x2722 <account_id>.L <actual_e-mail>.40B <new_e-mail>.40B
                        if (RFIFOREST(fd) < 86)
                                return 0;
                {
                        login->fromchar_parse_change_email(fd, id, ip);
                }
                break;
 
                case 0x2724: // Receiving an account state update request from a map-server (relayed via char-server)
                        if (RFIFOREST(fd) < 10)
                                return 0;
                {
                        login->fromchar_parse_account_update(fd, id, ip);
                }
                break;
 
                case 0x2725: // Receiving of map-server via char-server a ban request
                        if (RFIFOREST(fd) < 18)
                                return 0;
                {
                        login->fromchar_parse_ban(fd, id, ip);
                }
                break;
 
                case 0x2727: // Change of sex (sex is reversed)
                        if( RFIFOREST(fd) < 6 )
                                return 0;
                {
                        login->fromchar_parse_change_sex(fd, id, ip);
                }
                break;
 
                case 0x2728: // We receive account_reg2 from a char-server, and we send them to other map-servers.
                        if( RFIFOREST(fd) < 4 || RFIFOREST(fd) < RFIFOW(fd,2) )
                                return 0;
                {
                        login->fromchar_parse_account_reg2(fd, id, ip);
                }
                break;
 
                case 0x272a: // Receiving of map-server via char-server an unban request
                        if( RFIFOREST(fd) < 6 )
                                return 0;
                {
                        login->fromchar_parse_unban(fd, id, ip);
                }
                break;
 
                case 0x272b:    // Set account_id to online [Wizputer]
                        if( RFIFOREST(fd) < 6 )
                                return 0;
                        login->fromchar_parse_account_online(fd, id);
                break;
 
                case 0x272c:   // Set account_id to offline [Wizputer]
                        if( RFIFOREST(fd) < 6 )
                                return 0;
                        login->fromchar_parse_account_offline(fd);
                break;
 
                case 0x272d: // Receive list of all online accounts. [Skotlex]
                        if (RFIFOREST(fd) < 4 || RFIFOREST(fd) < RFIFOW(fd,2))
                                return 0;
                        {
                                login->fromchar_parse_online_accounts(fd, id);
                        }
                        RFIFOSKIP(fd,RFIFOW(fd,2));
                break;
 
                case 0x272e: //Request account_reg2 for a character.
                        if (RFIFOREST(fd) < 10)
                                return 0;
                {
                        login->fromchar_parse_request_account_reg2(fd);
                }
                break;
 
                case 0x2736: // WAN IP update from char-server
                        if( RFIFOREST(fd) < 6 )
                                return 0;
                        login->fromchar_parse_update_wan_ip(fd, id);
                break;
 
                case 0x2737: //Request to set all offline.
                        login->fromchar_parse_all_offline(fd, id);
                break;
 
                case 0x2738: //Change PIN Code for a account
                        if( RFIFOREST(fd) < 11 )
                                return 0;
                        else {
                                login->fromchar_parse_change_pincode(fd);
                        }
                        break;
 
                case 0x2739: // PIN Code was entered wrong too often
                        if( RFIFOREST(fd) < 6 )
                                return 0;
                        else {
                                if (login->fromchar_parse_wrong_pincode(fd))
                                        return 0;
                        }
                break;
 
                case 0x2740: // Accinfo request forwarded by charserver on mapserver's account
                        if( RFIFOREST(fd) < 22 )
                                return 0;
                        else {
                                login->fromchar_parse_accinfo(fd);
                        }
                break;
                default:
                        ShowError("login_parse_fromchar: Unknown packet 0x%x from a char-server! Disconnecting!\n", command);
                        sockt->eof(fd);
                        return 0;
                } // switch
        } // while
 
        return 0;
}
 
 
//-------------------------------------
// Make new account
//-------------------------------------
int login_mmo_auth_new(const char* userid, const char* pass, const char sex, const char* last_ip) {
        static int num_regs = 0; // registration counter
        static int64 new_reg_tick = 0;
        int64 tick = timer->gettick();
        struct mmo_account acc;
 
        nullpo_retr(3, userid);
        nullpo_retr(3, pass);
        nullpo_retr(3, last_ip);
        //Account Registration Flood Protection by [Kevin]
        if( new_reg_tick == 0 )
                new_reg_tick = timer->gettick();
        if (DIFF_TICK(tick, new_reg_tick) < 0 && num_regs >= login->config->allowed_regs) {
                ShowNotice("Account registration denied (registration limit exceeded)\n");
                return 3;
        }
 
        if (login->config->new_acc_length_limit && (strlen(userid) < 4 || strlen(pass) < 4))
                return 1;
 
        // check for invalid inputs
        if( sex != 'M' && sex != 'F' )
                return 0; // 0 = Unregistered ID
 
        // check if the account doesn't exist already
        if( accounts->load_str(accounts, &acc, userid) ) {
                ShowNotice("Attempt of creation of an already existing account (account: %s_%c, pass: %s, received pass: %s)\n", userid, sex, acc.pass, pass);
                return 1; // 1 = Incorrect Password
        }
 
        memset(&acc, '\0', sizeof(acc));
        acc.account_id = -1; // assigned by account db
        safestrncpy(acc.userid, userid, sizeof(acc.userid));
        safestrncpy(acc.pass, pass, sizeof(acc.pass));
        acc.sex = sex;
        safestrncpy(acc.email, "[email protected]", sizeof(acc.email));
        acc.expiration_time = (login->config->start_limited_time != -1) ? time(NULL) + login->config->start_limited_time : 0;
        safestrncpy(acc.lastlogin, "0000-00-00 00:00:00", sizeof(acc.lastlogin));
        safestrncpy(acc.last_ip, last_ip, sizeof(acc.last_ip));
        safestrncpy(acc.birthdate, "0000-00-00", sizeof(acc.birthdate));
        safestrncpy(acc.pincode, "\0", sizeof(acc.pincode));
        acc.pincode_change = 0;
        acc.char_slots = 0;
 
        if( !accounts->create(accounts, &acc) )
                return 0;
 
        ShowNotice("Account creation (account %s, id: %d, pass: %s, sex: %c)\n", acc.userid, acc.account_id, acc.pass, acc.sex);
 
        if( DIFF_TICK(tick, new_reg_tick) > 0 ) {// Update the registration check.
                num_regs = 0;
                new_reg_tick = tick + login->config->time_allowed*1000;
        }
        ++num_regs;
 
        return -1;
}
 
//-----------------------------------------------------
// Check/authentication of a connection
//-----------------------------------------------------
// TODO: Map result values to an enum (or at least document them)
int login_mmo_auth(struct login_session_data* sd, bool isServer) {
        struct mmo_account acc;
        size_t len;
 
        char ip[16];
        nullpo_ret(sd);
        sockt->ip2str(sockt->session[sd->fd]->client_addr, ip);
 
        // DNS Blacklist check
        if (login->config->use_dnsbl) {
                char r_ip[16];
                char ip_dnsbl[256];
                char* dnsbl_serv;
                uint8* sin_addr = (uint8*)&sockt->session[sd->fd]->client_addr;
 
                sprintf(r_ip, "%u.%u.%u.%u", sin_addr[0], sin_addr[1], sin_addr[2], sin_addr[3]);
 
                for (dnsbl_serv = strtok(login->config->dnsbl_servs,","); dnsbl_serv != NULL; dnsbl_serv = strtok(NULL,",")) {
                        sprintf(ip_dnsbl, "%s.%s", r_ip, trim(dnsbl_serv));
                        if (sockt->host2ip(ip_dnsbl)) {
                                ShowInfo("DNSBL: (%s) Blacklisted. User Kicked.\n", r_ip);
                                return 3;
                        }
                }
 
        }
 
        //Client Version check
        if (login->config->check_client_version && sd->version != login->config->client_version_to_connect)
                return 5;
 
        len = strnlen(sd->userid, NAME_LENGTH);
 
        // Account creation with _M/_F
        if (login->config->new_account_flag) {
                if (len > 2 && sd->passwd[0] != '\0' && // valid user and password lengths
                        sd->passwdenc == PWENC_NONE && // unencoded password
                        sd->userid[len-2] == '_' && memchr("FfMm", sd->userid[len-1], 4)) // _M/_F suffix
                {
                        int result;
 
                        // remove the _M/_F suffix
                        len -= 2;
                        sd->userid[len] = '\0';
 
                        result = login->mmo_auth_new(sd->userid, sd->passwd, TOUPPER(sd->userid[len+1]), ip);
                        if( result != -1 )
                                return result;// Failed to make account. [Skotlex].
                }
        }
 
        if( len <= 0 ) { /** a empty password is fine, a userid is not. **/
                ShowNotice("Empty userid (received pass: '%s', ip: %s)\n", sd->passwd, ip);
                return 0; // 0 = Unregistered ID
        }
 
        if( !accounts->load_str(accounts, &acc, sd->userid) ) {
                ShowNotice("Unknown account (account: %s, received pass: %s, ip: %s)\n", sd->userid, sd->passwd, ip);
                return 0; // 0 = Unregistered ID
        }
 
        if( !login->check_password(sd->md5key, sd->passwdenc, sd->passwd, acc.pass) ) {
                ShowNotice("Invalid password (account: '%s', pass: '%s', received pass: '%s', ip: %s)\n", sd->userid, acc.pass, sd->passwd, ip);
                return 1; // 1 = Incorrect Password
        }
 
        if( acc.unban_time != 0 && acc.unban_time > time(NULL) ) {
                char tmpstr[24];
                timestamp2string(tmpstr, sizeof(tmpstr), acc.unban_time, login->config->date_format);
                ShowNotice("Connection refused (account: %s, pass: %s, banned until %s, ip: %s)\n", sd->userid, sd->passwd, tmpstr, ip);
                return 6; // 6 = Your are Prohibited to log in until %s
        }
 
        if( acc.state != 0 ) {
                ShowNotice("Connection refused (account: %s, pass: %s, state: %u, ip: %s)\n", sd->userid, sd->passwd, acc.state, ip);
                return acc.state - 1;
        }
 
        if (login->config->client_hash_check && !isServer) {
                struct client_hash_node *node = NULL;
                bool match = false;
 
                for (node = login->config->client_hash_nodes; node; node = node->next) {
                        if( acc.group_id < node->group_id )
                                continue;
                        if( *node->hash == '\0' // Allowed to login without hash
                         || (sd->has_client_hash && memcmp(node->hash, sd->client_hash, 16) == 0 ) // Correct hash
                        ) {
                                match = true;
                                break;
                        }
                }
 
                if( !match ) {
                        char smd5[33];
                        int i;
 
                        if( !sd->has_client_hash ) {
                                ShowNotice("Client didn't send client hash (account: %s, pass: %s, ip: %s)\n", sd->userid, sd->passwd, ip);
                                return 5;
                        }
 
                        for( i = 0; i < 16; i++ )
                                sprintf(&smd5[i * 2], "%02x", sd->client_hash[i]);
                        smd5[32] = '\0';
 
                        ShowNotice("Invalid client hash (account: %s, pass: %s, sent md5: %s, ip: %s)\n", sd->userid, sd->passwd, smd5, ip);
                        return 5;
                }
        }
 
        ShowNotice("Authentication accepted (account: %s, id: %d, ip: %s)\n", sd->userid, acc.account_id, ip);
 
        // update session data
        sd->account_id = acc.account_id;
        sd->login_id1 = rnd() + 1;
        sd->login_id2 = rnd() + 1;
        safestrncpy(sd->lastlogin, acc.lastlogin, sizeof(sd->lastlogin));
        sd->sex = acc.sex;
        sd->group_id = (uint8)acc.group_id;
        sd->expiration_time = acc.expiration_time;
 
        // update account data
        timestamp2string(acc.lastlogin, sizeof(acc.lastlogin), time(NULL), "%Y-%m-%d %H:%M:%S");
        safestrncpy(acc.last_ip, ip, sizeof(acc.last_ip));
        acc.unban_time = 0;
        acc.logincount++;
 
        accounts->save(accounts, &acc);
 
        if( sd->sex != 'S' && sd->account_id < START_ACCOUNT_NUM )
                ShowWarning("Account %s has account id %d! Account IDs must be over %d to work properly!\n", sd->userid, sd->account_id, START_ACCOUNT_NUM);
 
        return -1; // account OK
}
 
void login_kick(struct login_session_data* sd)
{
        uint8 buf[6];
        nullpo_retv(sd);
        WBUFW(buf,0) = 0x2734;
        WBUFL(buf,2) = sd->account_id;
        charif_sendallwos(-1, buf, 6);
}
 
void login_auth_ok(struct login_session_data* sd)
{
        int fd = 0;
        uint32 ip;
        struct login_auth_node* node;
 
        nullpo_retv(sd);
        fd = sd->fd;
        ip = sockt->session[fd]->client_addr;
        if( core->runflag != LOGINSERVER_ST_RUNNING )
        {
                // players can only login while running
                lclif->connection_error(fd, 1); // 01 = server closed
                return;
        }
 
        if (login->config->group_id_to_connect >= 0 && sd->group_id != login->config->group_id_to_connect) {
                ShowStatus("Connection refused: the required group id for connection is %d (account: %s, group: %d).\n", login->config->group_id_to_connect, sd->userid, sd->group_id);
                lclif->connection_error(fd, 1); // 01 = server closed
                return;
        } else if (login->config->min_group_id_to_connect >= 0 && login->config->group_id_to_connect == -1 && sd->group_id < login->config->min_group_id_to_connect) {
                ShowStatus("Connection refused: the minimum group id required for connection is %d (account: %s, group: %d).\n", login->config->min_group_id_to_connect, sd->userid, sd->group_id);
                lclif->connection_error(fd, 1); // 01 = server closed
                return;
        }
 
        {
                struct online_login_data* data = (struct online_login_data*)idb_get(login->online_db, sd->account_id);
                if( data )
                {// account is already marked as online!
                        if( data->char_server > -1 )
                        {// Request char servers to kick this account out. [Skotlex]
                                ShowNotice("User '%s' is already online - Rejected.\n", sd->userid);
                                login->kick(sd);
                                if( data->waiting_disconnect == INVALID_TIMER )
                                        data->waiting_disconnect = timer->add(timer->gettick()+AUTH_TIMEOUT, login->waiting_disconnect_timer, sd->account_id, 0);
 
                                lclif->connection_error(fd, 8); // 08 = Server still recognizes your last login
                                return;
                        }
                        else
                        if( data->char_server == -1 )
                        {// client has authed but did not access char-server yet
                                // wipe previous session
                                idb_remove(login->auth_db, sd->account_id);
                                login->remove_online_user(sd->account_id);
                                data = NULL;
                        }
                }
        }
 
        if (!lclif->server_list(sd)) {
                // if no char-server, don't send void list of servers, just disconnect the player with proper message
                ShowStatus("Connection refused: there is no char-server online (account: %s).\n", sd->userid);
                lclif->connection_error(fd, 1); // 01 = server closed
                return;
        }
 
        gepard_update_last_unique_id(sd->account_id, sockt->session[fd]->gepard_info.unique_id);
        login_log(fd, ip, sd->userid, 100, "login ok");
 
        ShowStatus("Connection of the account '%s' accepted.\n", sd->userid);
 
        // create temporary auth entry
        CREATE(node, struct login_auth_node, 1);
        node->account_id = sd->account_id;
        node->login_id1 = sd->login_id1;
        node->login_id2 = sd->login_id2;
        node->sex = sd->sex;
        node->ip = ip;
        node->version = sd->version;
        node->clienttype = sd->clienttype;
        node->group_id = sd->group_id;
        node->expiration_time = sd->expiration_time;
        idb_put(login->auth_db, sd->account_id, node);
 
        {
                struct online_login_data* data;
 
                // mark client as 'online'
                data = login->add_online_user(-1, sd->account_id);
 
                // schedule deletion of this node
                data->waiting_disconnect = timer->add(timer->gettick()+AUTH_TIMEOUT, login->waiting_disconnect_timer, sd->account_id, 0);
        }
}
 
void login_auth_failed(struct login_session_data *sd, int result)
{
        int fd;
        uint32 ip;
        time_t ban_time = 0;
        nullpo_retv(sd);
 
        fd = sd->fd;
        ip = sockt->session[fd]->client_addr;
        if (login->config->log_login) {
                const char* error;
                switch( result ) {
                case   0: error = "Unregistered ID."; break; // 0 = Unregistered ID
                case   1: error = "Incorrect Password."; break; // 1 = Incorrect Password
                case   2: error = "Account Expired."; break; // 2 = This ID is expired
                case   3: error = "Rejected from server."; break; // 3 = Rejected from Server
                case   4: error = "Blocked by GM."; break; // 4 = You have been blocked by the GM Team
                case   5: error = "Not latest game EXE."; break; // 5 = Your Game's EXE file is not the latest version
                case   6: error = "Banned."; break; // 6 = Your are Prohibited to log in until %s
                case   7: error = "Server Over-population."; break; // 7 = Server is jammed due to over populated
                case   8: error = "Account limit from company"; break; // 8 = No more accounts may be connected from this company
                case   9: error = "Ban by DBA"; break; // 9 = MSI_REFUSE_BAN_BY_DBA
                case  10: error = "Email not confirmed"; break; // 10 = MSI_REFUSE_EMAIL_NOT_CONFIRMED
                case  11: error = "Ban by GM"; break; // 11 = MSI_REFUSE_BAN_BY_GM
                case  12: error = "Working in DB"; break; // 12 = MSI_REFUSE_TEMP_BAN_FOR_DBWORK
                case  13: error = "Self Lock"; break; // 13 = MSI_REFUSE_SELF_LOCK
                case  14: error = "Not Permitted Group"; break; // 14 = MSI_REFUSE_NOT_PERMITTED_GROUP
                case  15: error = "Not Permitted Group"; break; // 15 = MSI_REFUSE_NOT_PERMITTED_GROUP
                case  99: error = "Account gone."; break; // 99 = This ID has been totally erased
                case 100: error = "Login info remains."; break; // 100 = Login information remains at %s
                case 101: error = "Hacking investigation."; break; // 101 = Account has been locked for a hacking investigation. Please contact the GM Team for more information
                case 102: error = "Bug investigation."; break; // 102 = This account has been temporarily prohibited from login due to a bug-related investigation
                case 103: error = "Deleting char."; break; // 103 = This character is being deleted. Login is temporarily unavailable for the time being
                case 104: error = "Deleting spouse char."; break; // 104 = This character is being deleted. Login is temporarily unavailable for the time being
                default : error = "Unknown Error."; break;
                }
 
                login_log(fd, ip, sd->userid, result, error); // FIXME: result can be 100, conflicting with the value 100 we use for successful login...
        }
 
        if (result == 1 && login->config->dynamic_pass_failure_ban && !sockt->trusted_ip_check(ip))
                ipban_log(ip); // log failed password attempt
 
        if (result == 6) {
                struct mmo_account acc = { 0 };
                if (accounts->load_str(accounts, &acc, sd->userid))
                        ban_time = acc.unban_time;
        }
        lclif->auth_failed(fd, ban_time, result);
}
 
bool login_client_login(int fd, struct login_session_data *sd) __attribute__((nonnull (2)));
bool login_client_login(int fd, struct login_session_data *sd)
{
        int result;
        char ip[16];
        uint32 ipl = sockt->session[fd]->client_addr;
        sockt->ip2str(ipl, ip);
 
        ShowStatus("Request for connection %sof %s (ip: %s).\n", sd->passwdenc == PASSWORDENC ? " (passwdenc mode)" : "", sd->userid, ip);
 
        if (sd->passwdenc != PWENC_NONE && login->config->use_md5_passwds) {
                login->auth_failed(sd, 3); // send "rejected from server"
                return true;
        }
 
        result = login->mmo_auth(sd, false);
        if( result == -1 )
                login->auth_ok(sd);
        else
                login->auth_failed(sd, result);
 
        return false;
}
 
void login_char_server_connection_status(int fd, struct login_session_data* sd, uint8 status) __attribute__((nonnull (2)));
void login_char_server_connection_status(int fd, struct login_session_data* sd, uint8 status)
{
        WFIFOHEAD(fd,3);
        WFIFOW(fd,0) = 0x2711;
        WFIFOB(fd,2) = status;
        WFIFOSET(fd,3);
}
 
// CA_CHARSERVERCONNECT
void login_parse_request_connection(int fd, struct login_session_data* sd, const char *const ip, uint32 ipl) __attribute__((nonnull (2, 3)));
void login_parse_request_connection(int fd, struct login_session_data* sd, const char *const ip, uint32 ipl)
{
        char server_name[20];
        char message[256];
        uint32 server_ip;
        uint16 server_port;
        uint16 type;
        uint16 new_;
        int result;
 
        safestrncpy(sd->userid, RFIFOP(fd,2), NAME_LENGTH);
        safestrncpy(sd->passwd, RFIFOP(fd,26), NAME_LENGTH);
        if (login->config->use_md5_passwds)
                MD5_String(sd->passwd, sd->passwd);
        sd->passwdenc = PWENC_NONE;
        sd->version = login->config->client_version_to_connect; // hack to skip version check
        server_ip = ntohl(RFIFOL(fd,54));
        server_port = ntohs(RFIFOW(fd,58));
        safestrncpy(server_name, RFIFOP(fd,60), 20);
        type = RFIFOW(fd,82);
        new_ = RFIFOW(fd,84);
 
        ShowInfo("Connection request of the char-server '%s' @ %u.%u.%u.%u:%u (account: '%s', pass: '%s', ip: '%s')\n", server_name, CONVIP(server_ip), server_port, sd->userid, sd->passwd, ip);
        sprintf(message, "charserver - %s@%u.%u.%u.%u:%u", server_name, CONVIP(server_ip), server_port);
        login_log(fd, sockt->session[fd]->client_addr, sd->userid, 100, message);
 
        result = login->mmo_auth(sd, true);
        if (core->runflag == LOGINSERVER_ST_RUNNING &&
                result == -1 &&
                sd->sex == 'S' &&
                sd->account_id >= 0 &&
                sd->account_id < ARRAYLENGTH(server) &&
                !sockt->session_is_valid(server[sd->account_id].fd) &&
                sockt->allowed_ip_check(ipl))
        {
                ShowStatus("Connection of the char-server '%s' accepted.\n", server_name);
                safestrncpy(server[sd->account_id].name, server_name, sizeof(server[sd->account_id].name));
                server[sd->account_id].fd = fd;
                server[sd->account_id].ip = server_ip;
                server[sd->account_id].port = server_port;
                server[sd->account_id].users = 0;
                server[sd->account_id].type = type;
                server[sd->account_id].new_ = new_;
 
                sockt->session[fd]->func_parse = login->parse_fromchar;
                sockt->session[fd]->flag.server = 1;
                sockt->realloc_fifo(fd, FIFOSIZE_SERVERLINK, FIFOSIZE_SERVERLINK);
 
                // send connection success
                login->char_server_connection_status(fd, sd, 0);
        }
        else
        {
                ShowNotice("Connection of the char-server '%s' REFUSED.\n", server_name);
                login->char_server_connection_status(fd, sd, 3);
        }
}
 
void login_config_set_defaults(void)
{
        login->config->login_ip = INADDR_ANY;
        login->config->login_port = 6900;
        login->config->ipban_cleanup_interval = 60;
        login->config->ip_sync_interval = 0;
        login->config->log_login = true;
        safestrncpy(login->config->date_format, "%Y-%m-%d %H:%M:%S", sizeof(login->config->date_format));
        login->config->new_account_flag = true;
        login->config->new_acc_length_limit = true;
        login->config->use_md5_passwds = false;
        login->config->group_id_to_connect = -1;
        login->config->min_group_id_to_connect = -1;
        login->config->check_client_version = false;
        login->config->client_version_to_connect = 20;
        login->config->allowed_regs = 1;
        login->config->time_allowed = 10;
 
        login->config->ipban = true;
        login->config->dynamic_pass_failure_ban = true;
        login->config->dynamic_pass_failure_ban_interval = 5;
        login->config->dynamic_pass_failure_ban_limit = 7;
        login->config->dynamic_pass_failure_ban_duration = 5;
        login->config->use_dnsbl = false;
        safestrncpy(login->config->dnsbl_servs, "", sizeof(login->config->dnsbl_servs));
 
        login->config->client_hash_check = 0;
        login->config->client_hash_nodes = NULL;
}
 
//-----------------------------------
// Reading main configuration file
//-----------------------------------
int login_config_read(const char *cfgName)
{
        char line[1024], w1[1024], w2[1024];
        FILE* fp;
        nullpo_retr(1, cfgName);
        fp = fopen(cfgName, "r");
        if (fp == NULL) {
                ShowError("Configuration file (%s) not found.\n", cfgName);
                return 1;
        }
        while(fgets(line, sizeof(line), fp)) {
                if (line[0] == '/' && line[1] == '/')
                        continue;
 
                if (sscanf(line, "%1023[^:]: %1023[^\r\n]", w1, w2) < 2)
                        continue;
 
                if(!strcmpi(w1,"timestamp_format"))
                        safestrncpy(showmsg->timestamp_format, w2, 20);
                else if(!strcmpi(w1,"stdout_with_ansisequence"))
                        showmsg->stdout_with_ansisequence = config_switch(w2) ? true : false;
                else if(!strcmpi(w1,"console_silent")) {
                        showmsg->silent = atoi(w2);
                        if (showmsg->silent) /* only bother if we actually have this enabled */
                                ShowInfo("Console Silent Setting: %d\n", atoi(w2));
                }
                else if( !strcmpi(w1, "bind_ip") ) {
                        login->config->login_ip = sockt->host2ip(w2);
                        if (login->config->login_ip) {
                                char ip_str[16];
                                ShowStatus("Login server binding IP address : %s -> %s\n", w2, sockt->ip2str(login->config->login_ip, ip_str));
                        }
                }
                else if( !strcmpi(w1, "login_port") ) {
                        login->config->login_port = (uint16)atoi(w2);
                }
                else if(!strcmpi(w1, "log_login"))
                        login->config->log_login = (bool)config_switch(w2);
 
                else if(!strcmpi(w1, "new_account"))
                        login->config->new_account_flag = (bool)config_switch(w2);
                else if(!strcmpi(w1, "new_acc_length_limit"))
                        login->config->new_acc_length_limit = (bool)config_switch(w2);
                else if(!strcmpi(w1, "start_limited_time"))
                        login->config->start_limited_time = atoi(w2);
                else if(!strcmpi(w1, "check_client_version"))
                        login->config->check_client_version = (bool)config_switch(w2);
                else if(!strcmpi(w1, "client_version_to_connect"))
                        login->config->client_version_to_connect = (unsigned int)strtoul(w2, NULL, 10);
                else if(!strcmpi(w1, "use_MD5_passwords"))
                        login->config->use_md5_passwds = (bool)config_switch(w2);
                else if(!strcmpi(w1, "group_id_to_connect"))
                        login->config->group_id_to_connect = atoi(w2);
                else if(!strcmpi(w1, "min_group_id_to_connect"))
                        login->config->min_group_id_to_connect = atoi(w2);
                else if(!strcmpi(w1, "date_format"))
                        safestrncpy(login->config->date_format, w2, sizeof(login->config->date_format));
                else if(!strcmpi(w1, "allowed_regs")) //account flood protection system
                        login->config->allowed_regs = atoi(w2);
                else if(!strcmpi(w1, "time_allowed"))
                        login->config->time_allowed = atoi(w2);
                else if(!strcmpi(w1, "use_dnsbl"))
                        login->config->use_dnsbl = (bool)config_switch(w2);
                else if(!strcmpi(w1, "dnsbl_servers"))
                        safestrncpy(login->config->dnsbl_servs, w2, sizeof(login->config->dnsbl_servs));
                else if(!strcmpi(w1, "ipban_cleanup_interval"))
                        login->config->ipban_cleanup_interval = (unsigned int)atoi(w2);
                else if(!strcmpi(w1, "ip_sync_interval"))
                        login->config->ip_sync_interval = (unsigned int)1000*60*atoi(w2); //w2 comes in minutes.
                else if(!strcmpi(w1, "client_hash_check"))
                        login->config->client_hash_check = config_switch(w2);
                else if(!strcmpi(w1, "client_hash")) {
                        int group = 0;
                        char md5[33];
                        memset(md5, '\0', 33);
 
                        if (sscanf(w2, "%d, %32s", &group, md5) == 2) {
                                struct client_hash_node *nnode;
                                CREATE(nnode, struct client_hash_node, 1);
 
                                if (strcmpi(md5, "disabled") == 0) {
                                        nnode->hash[0] = '\0';
                                } else {
                                        int i;
                                        for (i = 0; i < 32; i += 2) {
                                                char buf[3];
                                                unsigned int byte;
 
                                                memcpy(buf, &md5[i], 2);
                                                buf[2] = 0;
 
                                                sscanf(buf, "%x", &byte);
                                                nnode->hash[i / 2] = (uint8)(byte & 0xFF);
                                        }
                                }
 
                                nnode->group_id = group;
                                nnode->next = login->config->client_hash_nodes;
 
                                login->config->client_hash_nodes = nnode;
                        }
                }
                else if(!strcmpi(w1, "import"))
                        login_config_read(w2);
                else
                {
                        AccountDB* db = account_engine[0].db;
                        if (db)
                                db->set_property(db, w1, w2);
                        ipban_config_read(w1, w2);
                        loginlog_config_read(w1, w2);
                        HPM->parseConf(w1, w2, HPCT_LOGIN);
                }
        }
        fclose(fp);
        ShowInfo("Finished reading %s.\n", cfgName);
        return 0;
}
 
//--------------------------------------
// Function called at exit of the server
//--------------------------------------
int do_final(void) {
        int i;
        struct client_hash_node *hn = login->config->client_hash_nodes;
 
        ShowStatus("Terminating...\n");
 
        HPM->event(HPET_FINAL);
 
        while (hn) {
                struct client_hash_node *tmp = hn;
                hn = hn->next;
                aFree(tmp);
        }
 
        login_log(0, "login server", 100, "login server shutdown");
 
        if (login->config->log_login)
                loginlog_final();
 
        ipban_final();
 
        if( account_engine[0].db )
        {// destroy account engine
                account_engine[0].db->destroy(account_engine[0].db);
                account_engine[0].db = NULL;
        }
        accounts = NULL; // destroyed in account_engine
        login->online_db->destroy(login->online_db, NULL);
        login->auth_db->destroy(login->auth_db, NULL);
 
        for( i = 0; i < ARRAYLENGTH(server); ++i )
                chrif_server_destroy(i);
 
        if( login->fd != -1 )
        {
                sockt->close(login->fd);
                login->fd = -1;
        }
 
        lclif->final();
 
        HPM_login_do_final();
 
        aFree(login->LOGIN_CONF_NAME);
        aFree(login->NET_CONF_NAME);
 
        HPM->event(HPET_POST_FINAL);
 
        ShowStatus("Finished.\n");
        return EXIT_SUCCESS;
}
 
//------------------------------
// Function called when the server
// has received a crash signal.
//------------------------------
void do_abort(void)
{
}
 
void set_server_type(void) {
        SERVER_TYPE = SERVER_TYPE_LOGIN;
}
 
 
/// Called when a terminate signal is received.
void do_shutdown_login(void)
{
        if( core->runflag != LOGINSERVER_ST_SHUTDOWN )
        {
                int id;
                core->runflag = LOGINSERVER_ST_SHUTDOWN;
                ShowStatus("Shutting down...\n");
                // TODO proper shutdown procedure; kick all characters, wait for acks, ...  [FlavioJS]
                for( id = 0; id < ARRAYLENGTH(server); ++id )
                        chrif_server_reset(id);
                sockt->flush_fifos();
                core->runflag = CORE_ST_STOP;
        }
}
 
/**
 * --login-config handler
 *
 * Overrides the default login configuration file.
 * @see cmdline->exec
 */
static CMDLINEARG(loginconfig)
{
        aFree(login->LOGIN_CONF_NAME);
        login->LOGIN_CONF_NAME = aStrdup(params);
        return true;
}
/**
 * --net-config handler
 *
 * Overrides the default subnet configuration file.
 * @see cmdline->exec
 */
static CMDLINEARG(netconfig)
{
        aFree(login->NET_CONF_NAME);
        login->NET_CONF_NAME = aStrdup(params);
        return true;
}
/**
 * Defines the local command line arguments
 */
void cmdline_args_init_local(void)
{
        CMDLINEARG_DEF2(login-config, loginconfig, "Alternative login-server configuration.", CMDLINE_OPT_PARAM);
        CMDLINEARG_DEF2(net-config, netconfig, "Alternative subnet configuration.", CMDLINE_OPT_PARAM);
}
 
//------------------------------
// Login server initialization
//------------------------------
int do_init(int argc, char** argv)
{
        int i;
 
        // initialize engine (to accept config settings)
        account_engine[0].db = account_engine[0].constructor();
        accounts = account_engine[0].db;
        if( accounts == NULL ) {
                ShowFatalError("do_init: account engine 'sql' not found.\n");
                exit(EXIT_FAILURE);
        }
 
        login_defaults();
        lclif_defaults();
 
        // read login-server configuration
        login->config_set_defaults();
 
        login->LOGIN_CONF_NAME = aStrdup("conf/login-server.conf");
        login->NET_CONF_NAME   = aStrdup("conf/network.conf");
 
        lclif->init();
 
        HPM_login_do_init();
        cmdline->exec(argc, argv, CMDLINE_OPT_PREINIT);
        HPM->config_read();
        HPM->event(HPET_PRE_INIT);
 
        cmdline->exec(argc, argv, CMDLINE_OPT_NORMAL);
        login_config_read(login->LOGIN_CONF_NAME);
        sockt->net_config_read(login->NET_CONF_NAME);
 
        for( i = 0; i < ARRAYLENGTH(server); ++i )
                chrif_server_init(i);
 
        // initialize logging
        if (login->config->log_login)
                loginlog_init();
 
        // initialize static and dynamic ipban system
        ipban_init();
 
        // Online user database init
        login->online_db = idb_alloc(DB_OPT_RELEASE_DATA);
        timer->add_func_list(login->waiting_disconnect_timer, "login->waiting_disconnect_timer");
 
        // Interserver auth init
        login->auth_db = idb_alloc(DB_OPT_RELEASE_DATA);
 
        // set default parser as lclif->parse function
        sockt->set_defaultparse(lclif->parse);
 
        // every 10 minutes cleanup online account db.
        timer->add_func_list(login->online_data_cleanup, "login->online_data_cleanup");
        timer->add_interval(timer->gettick() + 600*1000, login->online_data_cleanup, 0, 0, 600*1000);
 
        // add timer to detect ip address change and perform update
        if (login->config->ip_sync_interval) {
                timer->add_func_list(login->sync_ip_addresses, "login->sync_ip_addresses");
                timer->add_interval(timer->gettick() + login->config->ip_sync_interval, login->sync_ip_addresses, 0, 0, login->config->ip_sync_interval);
        }
 
        // Account database init
        if(!accounts->init(accounts)) {
                ShowFatalError("do_init: Failed to initialize account engine 'sql'.\n");
                exit(EXIT_FAILURE);
        }
 
        HPM->event(HPET_INIT);
 
        // server port open & binding
        if ((login->fd = sockt->make_listen_bind(login->config->login_ip,login->config->login_port)) == -1) {
                ShowFatalError("Failed to bind to port '"CL_WHITE"%d"CL_RESET"'\n",login->config->login_port);
                exit(EXIT_FAILURE);
        }
 
        if( core->runflag != CORE_ST_STOP ) {
                core->shutdown_callback = do_shutdown_login;
                core->runflag = LOGINSERVER_ST_RUNNING;
        }
 
#ifdef CONSOLE_INPUT
        console->display_gplnotice();
#endif // CONSOLE_INPUT
 
        ShowStatus("The login-server is "CL_GREEN"ready"CL_RESET" (Server is listening on the port %u).\n\n", login->config->login_port);
        login_log(0, "login server", 100, "login server started");
 
        HPM->event(HPET_READY);
 
        return 0;
}
 
void login_defaults(void) {
        login = &login_s;
 
        login->config = &login_config_;
        login->accounts = accounts;
 
        login->mmo_auth = login_mmo_auth;
        login->mmo_auth_new = login_mmo_auth_new;
        login->waiting_disconnect_timer = login_waiting_disconnect_timer;
        login->create_online_user = login_create_online_user;
        login->add_online_user = login_add_online_user;
        login->remove_online_user = login_remove_online_user;
        login->online_db_setoffline = login_online_db_setoffline;
        login->online_data_cleanup_sub = login_online_data_cleanup_sub;
        login->online_data_cleanup = login_online_data_cleanup;
        login->sync_ip_addresses = login_sync_ip_addresses;
        login->check_encrypted = login_check_encrypted;
        login->check_password = login_check_password;
        login->lan_subnet_check = login_lan_subnet_check;
 
        login->fromchar_auth_ack = login_fromchar_auth_ack;
        login->fromchar_accinfo = login_fromchar_accinfo;
        login->fromchar_account = login_fromchar_account;
        login->fromchar_account_update_other = login_fromchar_account_update_other;
        login->fromchar_ban = login_fromchar_ban;
        login->fromchar_change_sex_other = login_fromchar_change_sex_other;
        login->fromchar_pong = login_fromchar_pong;
        login->fromchar_parse_auth = login_fromchar_parse_auth;
        login->fromchar_parse_update_users = login_fromchar_parse_update_users;
        login->fromchar_parse_request_change_email = login_fromchar_parse_request_change_email;
        login->fromchar_parse_account_data = login_fromchar_parse_account_data;
        login->fromchar_parse_ping = login_fromchar_parse_ping;
        login->fromchar_parse_change_email = login_fromchar_parse_change_email;
        login->fromchar_parse_account_update = login_fromchar_parse_account_update;
        login->fromchar_parse_ban = login_fromchar_parse_ban;
        login->fromchar_parse_change_sex = login_fromchar_parse_change_sex;
        login->fromchar_parse_account_reg2 = login_fromchar_parse_account_reg2;
        login->fromchar_parse_unban = login_fromchar_parse_unban;
        login->fromchar_parse_account_online = login_fromchar_parse_account_online;
        login->fromchar_parse_account_offline = login_fromchar_parse_account_offline;
        login->fromchar_parse_online_accounts = login_fromchar_parse_online_accounts;
        login->fromchar_parse_request_account_reg2 = login_fromchar_parse_request_account_reg2;
        login->fromchar_parse_update_wan_ip = login_fromchar_parse_update_wan_ip;
        login->fromchar_parse_all_offline = login_fromchar_parse_all_offline;
        login->fromchar_parse_change_pincode = login_fromchar_parse_change_pincode;
        login->fromchar_parse_wrong_pincode = login_fromchar_parse_wrong_pincode;
        login->fromchar_parse_accinfo = login_fromchar_parse_accinfo;
 
        login->parse_fromchar = login_parse_fromchar;
        login->client_login = login_client_login;
        login->parse_request_connection = login_parse_request_connection;
        login->auth_ok = login_auth_ok;
        login->auth_failed = login_auth_failed;
        login->char_server_connection_status = login_char_server_connection_status;
        login->kick = login_kick;
 
        login->config_set_defaults = login_config_set_defaults;
        login->config_read = login_config_read;
        login->LOGIN_CONF_NAME = NULL;
        login->NET_CONF_NAME = NULL;
}
 
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