lbbs/src/login.c

/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
 * login
 *   - user authentication and online status manager
 *
 * Copyright (C) 2004-2025  Leaflet <leaflet@leafok.com>
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "bbs.h"
#include "common.h"
#include "database.h"
#include "io.h"
#include "ip_mask.h"
#include "log.h"
#include "login.h"
#include "screen.h"
#include "user_priv.h"
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <regex.h>
#include <unistd.h>
#include <mysql/mysql.h>
#include <sys/param.h>

static const int BBS_username_min_len = 3; // common len = 5, special len = 3
static const int BBS_password_min_len = 5; // legacy len = 5, current len = 6

static const int BBS_allowed_login_failures_within_interval = 10;
static const int BBS_login_failures_count_interval = 10; // minutes
static const int BBS_allowed_login_failures_per_account = 3;

const int BBS_login_retry_times = 3;

int bbs_login(void)
{
        char username[BBS_username_max_len + 1];
        char password[BBS_password_max_len + 1];
        int i = 0;
        int ok = 0;

        for (; !SYS_server_exit && !ok && i < BBS_login_retry_times; i++)
        {
                prints("\033[1;33m请输入帐号\033[m(试用请输入`\033[1;36mguest\033[m', "
                           "注册请输入`\033[1;31mnew\033[m'): ");
                iflush();

                if (str_input(username, sizeof(username), DOECHO) < 0)
                {
                        continue;
                }

                if (strcmp(username, "guest") == 0)
                {
                        load_guest_info();

                        return 0;
                }

                if (strcmp(username, "new") == 0)
                {
                        display_file(DATA_REGISTER, 1);

                        return -1;
                }

                if (username[0] != '\0')
                {
                        prints("\033[1;37m请输入密码\033[m: ");
                        iflush();

                        if (str_input(password, sizeof(password), NOECHO) < 0)
                        {
                                continue;
                        }

                        ok = (check_user(username, password) == 0);
                        iflush();
                }
        }

        if (!ok)
        {
                display_file(DATA_LOGIN_ERROR, 1);
                return -1;
        }

        log_common("User \"%s\"(%ld) login from %s:%d\n",
                           BBS_username, BBS_priv.uid, hostaddr_client, port_client);

        return 0;
}

int check_user(const char *username, const char *password)
{
        MYSQL *db = NULL;
        MYSQL_RES *rs = NULL;
        MYSQL_ROW row;
        char sql[SQL_BUFFER_LEN];
        int ret = 0;
        int BBS_uid = 0;
        char client_addr[IP_ADDR_LEN];
        int i;
        int ok = 1;
        char user_tz_env[BBS_user_tz_max_len + 2];

        db = db_open();
        if (db == NULL)
        {
                ret = -1;
                goto cleanup;
        }

        // Verify format
        for (i = 0; ok && username[i] != '\0'; i++)
        {
                if (!(isalpha(username[i]) || (i > 0 && (isdigit(username[i]) || username[i] == '_'))))
                {
                        ok = 0;
                }
        }
        if (ok && (i < BBS_username_min_len || i > BBS_username_max_len))
        {
                ok = 0;
        }
        for (i = 0; ok && password[i] != '\0'; i++)
        {
                if (!isalnum(password[i]))
                {
                        ok = 0;
                }
        }
        if (ok && (i < BBS_password_min_len || i > BBS_password_max_len))
        {
                ok = 0;
        }

        if (!ok)
        {
                prints("\033[1;31m用户名或密码格式错误...\033[m\r\n");
                ret = 1;
                goto cleanup;
        }

        // Begin transaction
        if (mysql_query(db, "SET autocommit=0") != 0)
        {
                log_error("SET autocommit=0 error: %s\n", mysql_error(db));
                ret = -1;
                goto cleanup;
        }

        if (mysql_query(db, "BEGIN") != 0)
        {
                log_error("Begin transaction error: %s\n", mysql_error(db));
                ret = -1;
                goto cleanup;
        }

        // Failed login attempts from the same source (subnet /24) during certain time period
        strncpy(client_addr, hostaddr_client, sizeof(client_addr) - 1);
        client_addr[sizeof(client_addr) - 1] = '\0';

        snprintf(sql, sizeof(sql),
                         "SELECT COUNT(*) AS err_count FROM user_err_login_log "
                         "WHERE login_dt >= SUBDATE(NOW(), INTERVAL %d MINUTE) "
                         "AND login_ip LIKE '%s'",
                         BBS_login_failures_count_interval,
                         ip_mask(client_addr, 1, '%'));
        if (mysql_query(db, sql) != 0)
        {
                log_error("Query user_list error: %s\n", mysql_error(db));
                ret = -1;
                goto cleanup;
        }
        if ((rs = mysql_store_result(db)) == NULL)
        {
                log_error("Get user_list data failed\n");
                ret = -1;
                goto cleanup;
        }
        if ((row = mysql_fetch_row(rs)))
        {
                if (atoi(row[0]) >= BBS_allowed_login_failures_within_interval)
                {
                        prints("\033[1;31m来源存在多次失败登陆尝试，请稍后再试，或使用Web方式访问\033[m\r\n");
                        ret = 1;
                        goto cleanup;
                }
        }
        mysql_free_result(rs);
        rs = NULL;

        // Failed login attempts against the current username since last successful login
        snprintf(sql, sizeof(sql),
                         "SELECT COUNT(*) AS err_count FROM user_err_login_log "
                         "LEFT JOIN user_list ON user_err_login_log.username = user_list.username "
                         "LEFT JOIN user_pubinfo ON user_list.UID = user_pubinfo.UID "
                         "WHERE user_err_login_log.username = '%s' "
                         "AND (user_err_login_log.login_dt >= user_pubinfo.last_login_dt "
                         "OR user_pubinfo.last_login_dt IS NULL)",
                         username);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Query user_list error: %s\n", mysql_error(db));
                ret = -1;
                goto cleanup;
        }
        if ((rs = mysql_store_result(db)) == NULL)
        {
                log_error("Get user_list data failed\n");
                ret = -1;
                goto cleanup;
        }
        if ((row = mysql_fetch_row(rs)))
        {
                if (atoi(row[0]) >= BBS_allowed_login_failures_per_account)
                {
                        prints("\033[1;31m账户存在多次失败登陆尝试，请使用Web方式登录解锁\033[m\r\n");
                        ret = 1;
                        goto cleanup;
                }
        }
        mysql_free_result(rs);
        rs = NULL;

        snprintf(sql, sizeof(sql),
                         "SELECT UID, username, p_login FROM user_list "
                         "WHERE username = '%s' AND password = SHA2('%s', 256) AND enable",
                         username, password);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Query user_list error: %s\n", mysql_error(db));
                ret = -1;
                goto cleanup;
        }
        if ((rs = mysql_store_result(db)) == NULL)
        {
                log_error("Get user_list data failed\n");
                ret = -1;
                goto cleanup;
        }
        if ((row = mysql_fetch_row(rs)))
        {
                BBS_uid = atoi(row[0]);
                strncpy(BBS_username, row[1], sizeof(BBS_username) - 1);
                BBS_username[sizeof(BBS_username) - 1] = '\0';
                int p_login = atoi(row[2]);

                mysql_free_result(rs);
                rs = NULL;

                // Add user login log
                snprintf(sql, sizeof(sql),
                                 "INSERT INTO user_login_log(UID, login_dt, login_ip) "
                                 "VALUES(%d, NOW(), '%s')",
                                 BBS_uid, hostaddr_client);
                if (mysql_query(db, sql) != 0)
                {
                        log_error("Insert into user_login_log error: %s\n", mysql_error(db));
                        ret = -1;
                        goto cleanup;
                }

                // Commit transaction
                if (mysql_query(db, "COMMIT") != 0)
                {
                        log_error("Commit transaction error: %s\n", mysql_error(db));
                        ret = -1;
                        goto cleanup;
                }

                if (p_login == 0)
                {
                        prints("\033[1;31m您目前无权登陆...\033[m\r\n");
                        ret = 1;
                        goto cleanup;
                }
        }
        else
        {
                mysql_free_result(rs);
                rs = NULL;

                snprintf(sql, sizeof(sql),
                                 "INSERT INTO user_err_login_log(username, password, login_dt, login_ip) "
                                 "VALUES('%s', '%s', NOW(), '%s')",
                                 username, password, hostaddr_client);
                if (mysql_query(db, sql) != 0)
                {
                        log_error("Insert into user_err_login_log error: %s\n", mysql_error(db));
                        ret = -1;
                        goto cleanup;
                }

                // Commit transaction
                if (mysql_query(db, "COMMIT") != 0)
                {
                        log_error("Commit transaction error: %s\n", mysql_error(db));
                        ret = -1;
                        goto cleanup;
                }

                prints("\033[1;31m错误的用户名或密码...\033[m\r\n");
                ret = 1;
                goto cleanup;
        }

        // Set AUTOCOMMIT = 1
        if (mysql_query(db, "SET autocommit=1") != 0)
        {
                log_error("SET autocommit=1 error: %s\n", mysql_error(db));
                ret = -1;
                goto cleanup;
        }

        ret = load_user_info(db, BBS_uid);

        switch (ret)
        {
        case 0: // Login successfully
                break;
        case -1: // Load data error
                prints("\033[1;31m读取用户数据错误...\033[m\r\n");
                ret = -1;
                goto cleanup;
        case -2: // Unused
                prints("\033[1;31m请通过Web登录更新用户许可协议...\033[m\r\n");
                ret = 1;
                goto cleanup;
        case -3: // Dead
                prints("\033[1;31m很遗憾，您已经永远离开了我们的世界！\033[m\r\n");
                ret = 1;
                goto cleanup;
        default:
                ret = -2;
                goto cleanup;
        }

        snprintf(sql, sizeof(sql),
                         "UPDATE user_pubinfo SET visit_count = visit_count + 1, "
                         "last_login_dt = NOW() WHERE UID = %d",
                         BBS_uid);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Update user_pubinfo error: %s\n", mysql_error(db));
                ret = -1;
                goto cleanup;
        }

        if (user_online_add(db) != 0)
        {
                ret = -1;
                goto cleanup;
        }

        BBS_last_access_tm = BBS_login_tm = time(NULL);

        // Set user tz to process env
        if (BBS_user_tz[0] != '\0')
        {
                user_tz_env[0] = ':';
                strncpy(user_tz_env + 1, BBS_user_tz, sizeof(user_tz_env) - 2);
                user_tz_env[sizeof(user_tz_env) - 1] = '\0';

                if (setenv("TZ", user_tz_env, 1) == -1)
                {
                        log_error("setenv(TZ = %s) error %d\n", user_tz_env, errno);
                        return -3;
                }

                tzset();
        }

cleanup:
        mysql_free_result(rs);
        mysql_close(db);

        return ret;
}

int load_user_info(MYSQL *db, int BBS_uid)
{
        MYSQL_RES *rs = NULL;
        MYSQL_ROW row;
        char sql[SQL_BUFFER_LEN];
        int life;
        time_t last_login_dt;
        int ret = 0;

        snprintf(sql, sizeof(sql),
                         "SELECT life, UNIX_TIMESTAMP(last_login_dt), user_timezone, exp, nickname "
                         "FROM user_pubinfo WHERE UID = %d",
                         BBS_uid);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Query user_pubinfo error: %s\n", mysql_error(db));
                ret = -1;
                goto cleanup;
        }
        if ((rs = mysql_store_result(db)) == NULL)
        {
                log_error("Get user_pubinfo data failed\n");
                ret = -1;
                goto cleanup;
        }
        if ((row = mysql_fetch_row(rs)))
        {
                life = atoi(row[0]);
                last_login_dt = (time_t)atol(row[1]);

                strncpy(BBS_user_tz, row[2], sizeof(BBS_user_tz) - 1);
                BBS_user_tz[sizeof(BBS_user_tz) - 1] = '\0';

                BBS_user_exp = atoi(row[3]);

                strncpy(BBS_nickname, row[4], sizeof(BBS_nickname));
                BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';
        }
        else
        {
                ret = -1; // Data not found
                goto cleanup;
        }
        mysql_free_result(rs);
        rs = NULL;

        if (life != 333 && life != 365 && life != 666 && life != 999 && // Not immortal
                time(NULL) - last_login_dt > 60 * 60 * 24 * life)
        {
                ret = -3; // Dead
                goto cleanup;
        }

        if (load_priv(db, &BBS_priv, BBS_uid) != 0)
        {
                ret = -1;
                goto cleanup;
        }

cleanup:
        mysql_free_result(rs);

        return ret;
}

int load_guest_info(void)
{
        MYSQL *db = NULL;
        int ret = 0;

        db = db_open();
        if (db == NULL)
        {
                ret = -1;
                goto cleanup;
        }

        strncpy(BBS_username, "guest", sizeof(BBS_username) - 1);
        BBS_username[sizeof(BBS_username) - 1] = '\0';

        BBS_user_exp = 0;

        strncpy(BBS_nickname, "Guest", sizeof(BBS_nickname));
        BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';

        if (load_priv(db, &BBS_priv, 0) != 0)
        {
                ret = -1;
                goto cleanup;
        }

        if (user_online_add(db) != 0)
        {
                ret = -1;
                goto cleanup;
        }

        BBS_last_access_tm = BBS_login_tm = time(NULL);

cleanup:
        mysql_close(db);

        return ret;
}

int user_online_add(MYSQL *db)
{
        char sql[SQL_BUFFER_LEN];

        snprintf(sql, sizeof(sql),
                         "INSERT INTO visit_log(dt, IP) VALUES(NOW(), '%s')",
                         hostaddr_client);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Add visit log error: %s\n", mysql_error(db));
                return -1;
        }

        if (user_online_del(db) != 0)
        {
                return -2;
        }

        snprintf(sql, sizeof(sql),
                         "INSERT INTO user_online(SID, UID, ip, current_action, login_tm, last_tm) "
                         "VALUES('Telnet_Process_%d', %d, '%s', 'LOGIN', NOW(), NOW())",
                         getpid(), BBS_priv.uid, hostaddr_client);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Add user_online error: %s\n", mysql_error(db));
                return -3;
        }

        return 0;
}

int user_online_del(MYSQL *db)
{
        char sql[SQL_BUFFER_LEN];

        snprintf(sql, sizeof(sql),
                         "DELETE FROM user_online WHERE SID = 'Telnet_Process_%d'",
                         getpid());
        if (mysql_query(db, sql) != 0)
        {
                log_error("Delete user_online error: %s\n", mysql_error(db));
                return -1;
        }

        return 0;
}

int user_online_exp(MYSQL *db)
{
        char sql[SQL_BUFFER_LEN];

        // +1 exp for every 5 minutes online since last logout
        // but at most 24 hours worth of exp can be gained in Telnet session
        snprintf(sql, sizeof(sql),
                         "UPDATE user_pubinfo SET exp = exp + FLOOR(LEAST(TIMESTAMPDIFF("
                         "SECOND, GREATEST(last_login_dt, IF(last_logout_dt IS NULL, last_login_dt, last_logout_dt)), NOW()"
                         ") / 60 / 5, 12 * 24)), last_logout_dt = NOW() "
                         "WHERE UID = %d",
                         BBS_priv.uid);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Update user_pubinfo error: %s\n", mysql_error(db));
                return -1;
        }

        return 0;
}

int user_online_update(const char *action)
{
        MYSQL *db = NULL;
        char sql[SQL_BUFFER_LEN];

        if ((action == NULL || strcmp(BBS_current_action, action) == 0) &&
                time(NULL) - BBS_current_action_tm < BBS_current_action_refresh_interval) // No change
        {
                return 0;
        }

        if (action != NULL)
        {
                strncpy(BBS_current_action, action, sizeof(BBS_current_action) - 1);
                BBS_current_action[sizeof(BBS_current_action) - 1] = '\0';
        }

        BBS_current_action_tm = time(NULL);

        db = db_open();
        if (db == NULL)
        {
                log_error("db_open() error: %s\n", mysql_error(db));
                return -1;
        }

        snprintf(sql, sizeof(sql),
                         "UPDATE user_online SET current_action = '%s', last_tm = NOW() "
                         "WHERE SID = 'Telnet_Process_%d'",
                         BBS_current_action, getpid());
        if (mysql_query(db, sql) != 0)
        {
                log_error("Update user_online error: %s\n", mysql_error(db));
                return -2;
        }

        mysql_close(db);

        return 1;
}
1	sysadm	1.65	/* SPDX-License-Identifier: GPL-3.0-or-later */
2			/*
3			* login
4			* - user authentication and online status manager
5			*
6	sysadm	1.66	* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com>
7	sysadm	1.65	*/
8	sysadm	1.1
9	sysadm	1.68	#ifdef HAVE_CONFIG_H
10			#include "config.h"
11			#endif
12
13	sysadm	1.1	#include "bbs.h"
14			#include "common.h"
15	sysadm	1.48	#include "database.h"
16			#include "io.h"
17	sysadm	1.50	#include "ip_mask.h"
18	sysadm	1.14	#include "log.h"
19	sysadm	1.48	#include "login.h"
20	sysadm	1.14	#include "screen.h"
21	sysadm	1.48	#include "user_priv.h"
22			#include <ctype.h>
23	sysadm	1.34	#include <errno.h>
24	sysadm	1.48	#include <stdlib.h>
25	sysadm	1.14	#include <string.h>
26	sysadm	1.3	#include <regex.h>
27	sysadm	1.14	#include <unistd.h>
28	sysadm	1.36	#include <mysql/mysql.h>
29	sysadm	1.56	#include <sys/param.h>
30	sysadm	1.1
31	sysadm	1.64	static const int BBS_username_min_len = 3; // common len = 5, special len = 3
32			static const int BBS_password_min_len = 5; // legacy len = 5, current len = 6
33
34	sysadm	1.67	static const int BBS_allowed_login_failures_within_interval = 10;
35			static const int BBS_login_failures_count_interval = 10; // minutes
36			static const int BBS_allowed_login_failures_per_account = 3;
37
38			const int BBS_login_retry_times = 3;
39
40	sysadm	1.41	int bbs_login(void)
41	sysadm	1.1	{
42	sysadm	1.15	char username[BBS_username_max_len + 1];
43			char password[BBS_password_max_len + 1];
44	sysadm	1.37	int i = 0;
45	sysadm	1.16	int ok = 0;
46	sysadm	1.2
47	sysadm	1.37	for (; !SYS_server_exit && !ok && i < BBS_login_retry_times; i++)
48	sysadm	1.11	{
49	sysadm	1.49	prints("\033[1;33m请输入帐号\033[m(试用请输入`\033[1;36mguest\033[m', "
50			"注册请输入`\033[1;31mnew\033[m'): ");
51	sysadm	1.11	iflush();
52
53	sysadm	1.24	if (str_input(username, sizeof(username), DOECHO) < 0)
54			{
55			continue;
56			}
57	sysadm	1.11
58			if (strcmp(username, "guest") == 0)
59			{
60	sysadm	1.41	load_guest_info();
61	sysadm	1.14
62	sysadm	1.11	return 0;
63			}
64
65			if (strcmp(username, "new") == 0)
66			{
67	sysadm	1.42	display_file(DATA_REGISTER, 1);
68	sysadm	1.30
69	sysadm	1.51	return -1;
70	sysadm	1.11	}
71
72	sysadm	1.17	if (username[0] != '\0')
73	sysadm	1.11	{
74	sysadm	1.49	prints("\033[1;37m请输入密码\033[m: ");
75	sysadm	1.11	iflush();
76
77	sysadm	1.24	if (str_input(password, sizeof(password), NOECHO) < 0)
78			{
79			continue;
80			}
81	sysadm	1.11
82	sysadm	1.41	ok = (check_user(username, password) == 0);
83	sysadm	1.31	iflush();
84	sysadm	1.11	}
85	sysadm	1.24	}
86
87			if (!ok)
88			{
89	sysadm	1.42	display_file(DATA_LOGIN_ERROR, 1);
90	sysadm	1.24	return -1;
91	sysadm	1.11	}
92	sysadm	1.2
93	sysadm	1.38	log_common("User \"%s\"(%ld) login from %s:%d\n",
94	sysadm	1.39	BBS_username, BBS_priv.uid, hostaddr_client, port_client);
95	sysadm	1.28
96	sysadm	1.11	return 0;
97			}
98	sysadm	1.2
99	sysadm	1.41	int check_user(const char username, const char password)
100	sysadm	1.11	{
101	sysadm	1.44	MYSQL *db = NULL;
102			MYSQL_RES *rs = NULL;
103	sysadm	1.11	MYSQL_ROW row;
104	sysadm	1.15	char sql[SQL_BUFFER_LEN];
105	sysadm	1.44	int ret = 0;
106	sysadm	1.40	int BBS_uid = 0;
107	sysadm	1.22	char client_addr[IP_ADDR_LEN];
108	sysadm	1.27	int i;
109			int ok = 1;
110	sysadm	1.34	char user_tz_env[BBS_user_tz_max_len + 2];
111	sysadm	1.11
112	sysadm	1.41	db = db_open();
113			if (db == NULL)
114			{
115	sysadm	1.44	ret = -1;
116			goto cleanup;
117	sysadm	1.41	}
118
119	sysadm	1.11	// Verify format
120	sysadm	1.27	for (i = 0; ok && username[i] != '\0'; i++)
121			{
122	sysadm	1.63	if (!(isalpha(username[i]) \|\| (i > 0 && (isdigit(username[i]) \|\| username[i] == '_'))))
123	sysadm	1.27	{
124			ok = 0;
125			}
126			}
127	sysadm	1.64	if (ok && (i < BBS_username_min_len \|\| i > BBS_username_max_len))
128	sysadm	1.27	{
129			ok = 0;
130			}
131			for (i = 0; ok && password[i] != '\0'; i++)
132			{
133			if (!isalnum(password[i]))
134			{
135			ok = 0;
136			}
137			}
138	sysadm	1.64	if (ok && (i < BBS_password_min_len \|\| i > BBS_password_max_len))
139	sysadm	1.27	{
140			ok = 0;
141			}
142
143			if (!ok)
144	sysadm	1.5	{
145	sysadm	1.49	prints("\033[1;31m用户名或密码格式错误...\033[m\r\n");
146	sysadm	1.44	ret = 1;
147			goto cleanup;
148	sysadm	1.5	}
149
150	sysadm	1.13	// Begin transaction
151			if (mysql_query(db, "SET autocommit=0") != 0)
152			{
153	sysadm	1.33	log_error("SET autocommit=0 error: %s\n", mysql_error(db));
154	sysadm	1.44	ret = -1;
155			goto cleanup;
156	sysadm	1.13	}
157
158			if (mysql_query(db, "BEGIN") != 0)
159			{
160	sysadm	1.33	log_error("Begin transaction error: %s\n", mysql_error(db));
161	sysadm	1.44	ret = -1;
162			goto cleanup;
163	sysadm	1.13	}
164
165	sysadm	1.22	// Failed login attempts from the same source (subnet /24) during certain time period
166			strncpy(client_addr, hostaddr_client, sizeof(client_addr) - 1);
167			client_addr[sizeof(client_addr) - 1] = '\0';
168
169			snprintf(sql, sizeof(sql),
170			"SELECT COUNT(*) AS err_count FROM user_err_login_log "
171	sysadm	1.44	"WHERE login_dt >= SUBDATE(NOW(), INTERVAL %d MINUTE) "
172	sysadm	1.22	"AND login_ip LIKE '%s'",
173	sysadm	1.44	BBS_login_failures_count_interval,
174	sysadm	1.22	ip_mask(client_addr, 1, '%'));
175			if (mysql_query(db, sql) != 0)
176			{
177	sysadm	1.33	log_error("Query user_list error: %s\n", mysql_error(db));
178	sysadm	1.44	ret = -1;
179			goto cleanup;
180	sysadm	1.22	}
181			if ((rs = mysql_store_result(db)) == NULL)
182			{
183			log_error("Get user_list data failed\n");
184	sysadm	1.44	ret = -1;
185			goto cleanup;
186	sysadm	1.22	}
187			if ((row = mysql_fetch_row(rs)))
188			{
189	sysadm	1.52	if (atoi(row[0]) >= BBS_allowed_login_failures_within_interval)
190	sysadm	1.22	{
191	sysadm	1.52	prints("\033[1;31m来源存在多次失败登陆尝试，请稍后再试，或使用Web方式访问\033[m\r\n");
192	sysadm	1.44	ret = 1;
193			goto cleanup;
194	sysadm	1.22	}
195			}
196			mysql_free_result(rs);
197	sysadm	1.44	rs = NULL;
198	sysadm	1.22
199	sysadm	1.52	// Failed login attempts against the current username since last successful login
200	sysadm	1.22	snprintf(sql, sizeof(sql),
201			"SELECT COUNT(*) AS err_count FROM user_err_login_log "
202	sysadm	1.52	"LEFT JOIN user_list ON user_err_login_log.username = user_list.username "
203			"LEFT JOIN user_pubinfo ON user_list.UID = user_pubinfo.UID "
204			"WHERE user_err_login_log.username = '%s' "
205			"AND (user_err_login_log.login_dt >= user_pubinfo.last_login_dt "
206			"OR user_pubinfo.last_login_dt IS NULL)",
207	sysadm	1.22	username);
208			if (mysql_query(db, sql) != 0)
209			{
210	sysadm	1.33	log_error("Query user_list error: %s\n", mysql_error(db));
211	sysadm	1.44	ret = -1;
212			goto cleanup;
213	sysadm	1.22	}
214			if ((rs = mysql_store_result(db)) == NULL)
215			{
216			log_error("Get user_list data failed\n");
217	sysadm	1.44	ret = -1;
218			goto cleanup;
219	sysadm	1.22	}
220			if ((row = mysql_fetch_row(rs)))
221			{
222	sysadm	1.53	if (atoi(row[0]) >= BBS_allowed_login_failures_per_account)
223	sysadm	1.22	{
224	sysadm	1.52	prints("\033[1;31m账户存在多次失败登陆尝试，请使用Web方式登录解锁\033[m\r\n");
225	sysadm	1.44	ret = 1;
226			goto cleanup;
227	sysadm	1.22	}
228			}
229			mysql_free_result(rs);
230	sysadm	1.44	rs = NULL;
231	sysadm	1.22
232	sysadm	1.18	snprintf(sql, sizeof(sql),
233	sysadm	1.22	"SELECT UID, username, p_login FROM user_list "
234			"WHERE username = '%s' AND password = SHA2('%s', 256) AND enable",
235			username, password);
236	sysadm	1.11	if (mysql_query(db, sql) != 0)
237			{
238	sysadm	1.33	log_error("Query user_list error: %s\n", mysql_error(db));
239	sysadm	1.44	ret = -1;
240			goto cleanup;
241	sysadm	1.11	}
242			if ((rs = mysql_store_result(db)) == NULL)
243	sysadm	1.2	{
244	sysadm	1.11	log_error("Get user_list data failed\n");
245	sysadm	1.44	ret = -1;
246			goto cleanup;
247	sysadm	1.11	}
248	sysadm	1.15	if ((row = mysql_fetch_row(rs)))
249	sysadm	1.11	{
250	sysadm	1.40	BBS_uid = atoi(row[0]);
251	sysadm	1.17	strncpy(BBS_username, row[1], sizeof(BBS_username) - 1);
252			BBS_username[sizeof(BBS_username) - 1] = '\0';
253	sysadm	1.13	int p_login = atoi(row[2]);
254
255			mysql_free_result(rs);
256	sysadm	1.44	rs = NULL;
257	sysadm	1.13
258			// Add user login log
259	sysadm	1.18	snprintf(sql, sizeof(sql),
260	sysadm	1.22	"INSERT INTO user_login_log(UID, login_dt, login_ip) "
261	sysadm	1.40	"VALUES(%d, NOW(), '%s')",
262	sysadm	1.22	BBS_uid, hostaddr_client);
263	sysadm	1.13	if (mysql_query(db, sql) != 0)
264			{
265	sysadm	1.33	log_error("Insert into user_login_log error: %s\n", mysql_error(db));
266	sysadm	1.44	ret = -1;
267			goto cleanup;
268	sysadm	1.13	}
269
270			// Commit transaction
271			if (mysql_query(db, "COMMIT") != 0)
272			{
273	sysadm	1.33	log_error("Commit transaction error: %s\n", mysql_error(db));
274	sysadm	1.44	ret = -1;
275			goto cleanup;
276	sysadm	1.13	}
277
278			if (p_login == 0)
279	sysadm	1.11	{
280	sysadm	1.49	prints("\033[1;31m您目前无权登陆...\033[m\r\n");
281	sysadm	1.44	ret = 1;
282			goto cleanup;
283	sysadm	1.11	}
284			}
285			else
286			{
287			mysql_free_result(rs);
288	sysadm	1.44	rs = NULL;
289	sysadm	1.2
290	sysadm	1.18	snprintf(sql, sizeof(sql),
291	sysadm	1.22	"INSERT INTO user_err_login_log(username, password, login_dt, login_ip) "
292			"VALUES('%s', '%s', NOW(), '%s')",
293			username, password, hostaddr_client);
294	sysadm	1.11	if (mysql_query(db, sql) != 0)
295			{
296	sysadm	1.33	log_error("Insert into user_err_login_log error: %s\n", mysql_error(db));
297	sysadm	1.44	ret = -1;
298			goto cleanup;
299	sysadm	1.11	}
300
301	sysadm	1.13	// Commit transaction
302			if (mysql_query(db, "COMMIT") != 0)
303			{
304	sysadm	1.33	log_error("Commit transaction error: %s\n", mysql_error(db));
305	sysadm	1.44	ret = -1;
306			goto cleanup;
307	sysadm	1.13	}
308
309	sysadm	1.49	prints("\033[1;31m错误的用户名或密码...\033[m\r\n");
310	sysadm	1.44	ret = 1;
311			goto cleanup;
312	sysadm	1.11	}
313	sysadm	1.13
314			// Set AUTOCOMMIT = 1
315			if (mysql_query(db, "SET autocommit=1") != 0)
316			{
317	sysadm	1.33	log_error("SET autocommit=1 error: %s\n", mysql_error(db));
318	sysadm	1.44	ret = -1;
319			goto cleanup;
320	sysadm	1.13	}
321	sysadm	1.2
322	sysadm	1.11	ret = load_user_info(db, BBS_uid);
323
324			switch (ret)
325	sysadm	1.2	{
326	sysadm	1.11	case 0: // Login successfully
327			break;
328			case -1: // Load data error
329	sysadm	1.49	prints("\033[1;31m读取用户数据错误...\033[m\r\n");
330	sysadm	1.44	ret = -1;
331			goto cleanup;
332	sysadm	1.11	case -2: // Unused
333	sysadm	1.49	prints("\033[1;31m请通过Web登录更新用户许可协议...\033[m\r\n");
334	sysadm	1.44	ret = 1;
335			goto cleanup;
336	sysadm	1.11	case -3: // Dead
337	sysadm	1.49	prints("\033[1;31m很遗憾，您已经永远离开了我们的世界！\033[m\r\n");
338	sysadm	1.44	ret = 1;
339			goto cleanup;
340	sysadm	1.11	default:
341	sysadm	1.44	ret = -2;
342			goto cleanup;
343	sysadm	1.2	}
344
345	sysadm	1.18	snprintf(sql, sizeof(sql),
346	sysadm	1.22	"UPDATE user_pubinfo SET visit_count = visit_count + 1, "
347	sysadm	1.40	"last_login_dt = NOW() WHERE UID = %d",
348	sysadm	1.22	BBS_uid);
349	sysadm	1.13	if (mysql_query(db, sql) != 0)
350			{
351	sysadm	1.33	log_error("Update user_pubinfo error: %s\n", mysql_error(db));
352	sysadm	1.44	ret = -1;
353			goto cleanup;
354	sysadm	1.13	}
355
356	sysadm	1.15	if (user_online_add(db) != 0)
357			{
358	sysadm	1.44	ret = -1;
359			goto cleanup;
360	sysadm	1.15	}
361
362	sysadm	1.45	BBS_last_access_tm = BBS_login_tm = time(NULL);
363	sysadm	1.13
364	sysadm	1.34	// Set user tz to process env
365			if (BBS_user_tz[0] != '\0')
366			{
367			user_tz_env[0] = ':';
368			strncpy(user_tz_env + 1, BBS_user_tz, sizeof(user_tz_env) - 2);
369			user_tz_env[sizeof(user_tz_env) - 1] = '\0';
370
371			if (setenv("TZ", user_tz_env, 1) == -1)
372			{
373			log_error("setenv(TZ = %s) error %d\n", user_tz_env, errno);
374			return -3;
375			}
376
377			tzset();
378			}
379
380	sysadm	1.44	cleanup:
381			mysql_free_result(rs);
382	sysadm	1.41	mysql_close(db);
383
384	sysadm	1.44	return ret;
385	sysadm	1.1	}
386	sysadm	1.2
387	sysadm	1.40	int load_user_info(MYSQL *db, int BBS_uid)
388	sysadm	1.3	{
389	sysadm	1.44	MYSQL_RES *rs = NULL;
390	sysadm	1.11	MYSQL_ROW row;
391	sysadm	1.15	char sql[SQL_BUFFER_LEN];
392	sysadm	1.11	int life;
393			time_t last_login_dt;
394	sysadm	1.44	int ret = 0;
395	sysadm	1.11
396	sysadm	1.18	snprintf(sql, sizeof(sql),
397	sysadm	1.43	"SELECT life, UNIX_TIMESTAMP(last_login_dt), user_timezone, exp, nickname "
398	sysadm	1.40	"FROM user_pubinfo WHERE UID = %d",
399	sysadm	1.22	BBS_uid);
400	sysadm	1.11	if (mysql_query(db, sql) != 0)
401			{
402	sysadm	1.33	log_error("Query user_pubinfo error: %s\n", mysql_error(db));
403	sysadm	1.44	ret = -1;
404			goto cleanup;
405	sysadm	1.11	}
406			if ((rs = mysql_store_result(db)) == NULL)
407			{
408			log_error("Get user_pubinfo data failed\n");
409	sysadm	1.44	ret = -1;
410			goto cleanup;
411	sysadm	1.11	}
412	sysadm	1.15	if ((row = mysql_fetch_row(rs)))
413	sysadm	1.11	{
414			life = atoi(row[0]);
415			last_login_dt = (time_t)atol(row[1]);
416	sysadm	1.34
417			strncpy(BBS_user_tz, row[2], sizeof(BBS_user_tz) - 1);
418			BBS_user_tz[sizeof(BBS_user_tz) - 1] = '\0';
419	sysadm	1.43
420			BBS_user_exp = atoi(row[3]);
421
422			strncpy(BBS_nickname, row[4], sizeof(BBS_nickname));
423			BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';
424	sysadm	1.11	}
425			else
426			{
427	sysadm	1.44	ret = -1; // Data not found
428			goto cleanup;
429	sysadm	1.11	}
430			mysql_free_result(rs);
431	sysadm	1.44	rs = NULL;
432	sysadm	1.3
433	sysadm	1.13	if (life != 333 && life != 365 && life != 666 && life != 999 && // Not immortal
434	sysadm	1.45	time(NULL) - last_login_dt > 60 * 60 * 24 * life)
435	sysadm	1.11	{
436	sysadm	1.44	ret = -3; // Dead
437			goto cleanup;
438	sysadm	1.11	}
439	sysadm	1.5
440	sysadm	1.15	if (load_priv(db, &BBS_priv, BBS_uid) != 0)
441			{
442	sysadm	1.44	ret = -1;
443			goto cleanup;
444	sysadm	1.15	}
445	sysadm	1.11
446	sysadm	1.44	cleanup:
447			mysql_free_result(rs);
448
449			return ret;
450	sysadm	1.2	}
451	sysadm	1.5
452	sysadm	1.41	int load_guest_info(void)
453	sysadm	1.5	{
454	sysadm	1.44	MYSQL *db = NULL;
455			int ret = 0;
456	sysadm	1.41
457			db = db_open();
458			if (db == NULL)
459			{
460	sysadm	1.44	ret = -1;
461			goto cleanup;
462	sysadm	1.41	}
463
464	sysadm	1.17	strncpy(BBS_username, "guest", sizeof(BBS_username) - 1);
465			BBS_username[sizeof(BBS_username) - 1] = '\0';
466	sysadm	1.5
467	sysadm	1.43	BBS_user_exp = 0;
468
469			strncpy(BBS_nickname, "Guest", sizeof(BBS_nickname));
470			BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';
471
472	sysadm	1.15	if (load_priv(db, &BBS_priv, 0) != 0)
473			{
474	sysadm	1.44	ret = -1;
475			goto cleanup;
476	sysadm	1.15	}
477	sysadm	1.6
478	sysadm	1.15	if (user_online_add(db) != 0)
479			{
480	sysadm	1.44	ret = -1;
481			goto cleanup;
482	sysadm	1.15	}
483	sysadm	1.5
484	sysadm	1.45	BBS_last_access_tm = BBS_login_tm = time(NULL);
485	sysadm	1.5
486	sysadm	1.44	cleanup:
487	sysadm	1.41	mysql_close(db);
488	sysadm	1.44
489			return ret;
490	sysadm	1.5	}
491	sysadm	1.15
492			int user_online_add(MYSQL *db)
493			{
494			char sql[SQL_BUFFER_LEN];
495
496	sysadm	1.60	snprintf(sql, sizeof(sql),
497			"INSERT INTO visit_log(dt, IP) VALUES(NOW(), '%s')",
498			hostaddr_client);
499			if (mysql_query(db, sql) != 0)
500			{
501			log_error("Add visit log error: %s\n", mysql_error(db));
502			return -1;
503			}
504
505	sysadm	1.15	if (user_online_del(db) != 0)
506			{
507	sysadm	1.60	return -2;
508	sysadm	1.15	}
509
510	sysadm	1.18	snprintf(sql, sizeof(sql),
511	sysadm	1.61	"INSERT INTO user_online(SID, UID, ip, current_action, login_tm, last_tm) "
512			"VALUES('Telnet_Process_%d', %d, '%s', 'LOGIN', NOW(), NOW())",
513	sysadm	1.22	getpid(), BBS_priv.uid, hostaddr_client);
514	sysadm	1.15	if (mysql_query(db, sql) != 0)
515			{
516	sysadm	1.33	log_error("Add user_online error: %s\n", mysql_error(db));
517	sysadm	1.60	return -3;
518	sysadm	1.15	}
519
520			return 0;
521			}
522
523			int user_online_del(MYSQL *db)
524			{
525			char sql[SQL_BUFFER_LEN];
526
527	sysadm	1.57	snprintf(sql, sizeof(sql),
528			"DELETE FROM user_online WHERE SID = 'Telnet_Process_%d'",
529			getpid());
530			if (mysql_query(db, sql) != 0)
531			{
532			log_error("Delete user_online error: %s\n", mysql_error(db));
533			return -1;
534			}
535
536			return 0;
537			}
538
539			int user_online_exp(MYSQL *db)
540			{
541			char sql[SQL_BUFFER_LEN];
542
543	sysadm	1.56	// +1 exp for every 5 minutes online since last logout
544			// but at most 24 hours worth of exp can be gained in Telnet session
545			snprintf(sql, sizeof(sql),
546	sysadm	1.60	"UPDATE user_pubinfo SET exp = exp + FLOOR(LEAST(TIMESTAMPDIFF("
547			"SECOND, GREATEST(last_login_dt, IF(last_logout_dt IS NULL, last_login_dt, last_logout_dt)), NOW()"
548			") / 60 / 5, 12 * 24)), last_logout_dt = NOW() "
549			"WHERE UID = %d",
550			BBS_priv.uid);
551	sysadm	1.56	if (mysql_query(db, sql) != 0)
552			{
553			log_error("Update user_pubinfo error: %s\n", mysql_error(db));
554			return -1;
555			}
556	sysadm	1.15
557			return 0;
558			}
559	sysadm	1.47
560			int user_online_update(const char *action)
561			{
562			MYSQL *db = NULL;
563			char sql[SQL_BUFFER_LEN];
564
565	sysadm	1.55	if ((action == NULL \|\| strcmp(BBS_current_action, action) == 0) &&
566	sysadm	1.54	time(NULL) - BBS_current_action_tm < BBS_current_action_refresh_interval) // No change
567	sysadm	1.47	{
568			return 0;
569			}
570
571	sysadm	1.55	if (action != NULL)
572			{
573			strncpy(BBS_current_action, action, sizeof(BBS_current_action) - 1);
574			BBS_current_action[sizeof(BBS_current_action) - 1] = '\0';
575			}
576
577	sysadm	1.54	BBS_current_action_tm = time(NULL);
578	sysadm	1.47
579			db = db_open();
580			if (db == NULL)
581			{
582			log_error("db_open() error: %s\n", mysql_error(db));
583			return -1;
584			}
585
586			snprintf(sql, sizeof(sql),
587	sysadm	1.62	"UPDATE user_online SET current_action = '%s', last_tm = NOW() "
588	sysadm	1.47	"WHERE SID = 'Telnet_Process_%d'",
589			BBS_current_action, getpid());
590			if (mysql_query(db, sql) != 0)
591			{
592			log_error("Update user_online error: %s\n", mysql_error(db));
593			return -2;
594			}
595
596			mysql_close(db);
597
598			return 1;
599			}
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