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.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;
        }

        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((int)username[i]) || (i > 0 && (isdigit((int)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((int)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;
        }

        if (!SSH_v2 && checklevel2(&BBS_priv, P_MAN_S))
        {
                prints("\033[1;31m非普通账户必须使用SSH方式登录\033[m\r\n");
                ret = 1;
                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;
        }

        if (last_login_dt < BBS_eula_tm)
        {
                ret = -2; // require update agreement first
                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	1.69	#include <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	1.11	return 0;
94			}
95	sysadm	1.2
96	sysadm	1.41	int check_user(const char username, const char password)
97	sysadm	1.11	{
98	sysadm	1.44	MYSQL *db = NULL;
99			MYSQL_RES *rs = NULL;
100	sysadm	1.11	MYSQL_ROW row;
101	sysadm	1.15	char sql[SQL_BUFFER_LEN];
102	sysadm	1.44	int ret = 0;
103	sysadm	1.40	int BBS_uid = 0;
104	sysadm	1.22	char client_addr[IP_ADDR_LEN];
105	sysadm	1.27	int i;
106			int ok = 1;
107	sysadm	1.34	char user_tz_env[BBS_user_tz_max_len + 2];
108	sysadm	1.11
109	sysadm	1.41	db = db_open();
110			if (db == NULL)
111			{
112	sysadm	1.44	ret = -1;
113			goto cleanup;
114	sysadm	1.41	}
115
116	sysadm	1.11	// Verify format
117	sysadm	1.27	for (i = 0; ok && username[i] != '\0'; i++)
118			{
119	sysadm	1.70	if (!(isalpha((int)username[i]) \|\| (i > 0 && (isdigit((int)username[i]) \|\| username[i] == '_'))))
120	sysadm	1.27	{
121			ok = 0;
122			}
123			}
124	sysadm	1.64	if (ok && (i < BBS_username_min_len \|\| i > BBS_username_max_len))
125	sysadm	1.27	{
126			ok = 0;
127			}
128			for (i = 0; ok && password[i] != '\0'; i++)
129			{
130	sysadm	1.70	if (!isalnum((int)password[i]))
131	sysadm	1.27	{
132			ok = 0;
133			}
134			}
135	sysadm	1.64	if (ok && (i < BBS_password_min_len \|\| i > BBS_password_max_len))
136	sysadm	1.27	{
137			ok = 0;
138			}
139
140			if (!ok)
141	sysadm	1.5	{
142	sysadm	1.49	prints("\033[1;31m用户名或密码格式错误...\033[m\r\n");
143	sysadm	1.44	ret = 1;
144			goto cleanup;
145	sysadm	1.5	}
146
147	sysadm	1.13	// Begin transaction
148			if (mysql_query(db, "SET autocommit=0") != 0)
149			{
150	sysadm	1.33	log_error("SET autocommit=0 error: %s\n", mysql_error(db));
151	sysadm	1.44	ret = -1;
152			goto cleanup;
153	sysadm	1.13	}
154
155			if (mysql_query(db, "BEGIN") != 0)
156			{
157	sysadm	1.33	log_error("Begin transaction error: %s\n", mysql_error(db));
158	sysadm	1.44	ret = -1;
159			goto cleanup;
160	sysadm	1.13	}
161
162	sysadm	1.22	// Failed login attempts from the same source (subnet /24) during certain time period
163			strncpy(client_addr, hostaddr_client, sizeof(client_addr) - 1);
164			client_addr[sizeof(client_addr) - 1] = '\0';
165
166			snprintf(sql, sizeof(sql),
167			"SELECT COUNT(*) AS err_count FROM user_err_login_log "
168	sysadm	1.44	"WHERE login_dt >= SUBDATE(NOW(), INTERVAL %d MINUTE) "
169	sysadm	1.22	"AND login_ip LIKE '%s'",
170	sysadm	1.44	BBS_login_failures_count_interval,
171	sysadm	1.22	ip_mask(client_addr, 1, '%'));
172			if (mysql_query(db, sql) != 0)
173			{
174	sysadm	1.33	log_error("Query user_list error: %s\n", mysql_error(db));
175	sysadm	1.44	ret = -1;
176			goto cleanup;
177	sysadm	1.22	}
178			if ((rs = mysql_store_result(db)) == NULL)
179			{
180			log_error("Get user_list data failed\n");
181	sysadm	1.44	ret = -1;
182			goto cleanup;
183	sysadm	1.22	}
184			if ((row = mysql_fetch_row(rs)))
185			{
186	sysadm	1.52	if (atoi(row[0]) >= BBS_allowed_login_failures_within_interval)
187	sysadm	1.22	{
188	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");
189	sysadm	1.44	ret = 1;
190			goto cleanup;
191	sysadm	1.22	}
192			}
193			mysql_free_result(rs);
194	sysadm	1.44	rs = NULL;
195	sysadm	1.22
196	sysadm	1.52	// Failed login attempts against the current username since last successful login
197	sysadm	1.22	snprintf(sql, sizeof(sql),
198			"SELECT COUNT(*) AS err_count FROM user_err_login_log "
199	sysadm	1.52	"LEFT JOIN user_list ON user_err_login_log.username = user_list.username "
200			"LEFT JOIN user_pubinfo ON user_list.UID = user_pubinfo.UID "
201			"WHERE user_err_login_log.username = '%s' "
202			"AND (user_err_login_log.login_dt >= user_pubinfo.last_login_dt "
203			"OR user_pubinfo.last_login_dt IS NULL)",
204	sysadm	1.22	username);
205			if (mysql_query(db, sql) != 0)
206			{
207	sysadm	1.33	log_error("Query user_list error: %s\n", mysql_error(db));
208	sysadm	1.44	ret = -1;
209			goto cleanup;
210	sysadm	1.22	}
211			if ((rs = mysql_store_result(db)) == NULL)
212			{
213			log_error("Get user_list data failed\n");
214	sysadm	1.44	ret = -1;
215			goto cleanup;
216	sysadm	1.22	}
217			if ((row = mysql_fetch_row(rs)))
218			{
219	sysadm	1.53	if (atoi(row[0]) >= BBS_allowed_login_failures_per_account)
220	sysadm	1.22	{
221	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");
222	sysadm	1.44	ret = 1;
223			goto cleanup;
224	sysadm	1.22	}
225			}
226			mysql_free_result(rs);
227	sysadm	1.44	rs = NULL;
228	sysadm	1.22
229	sysadm	1.18	snprintf(sql, sizeof(sql),
230	sysadm	1.22	"SELECT UID, username, p_login FROM user_list "
231			"WHERE username = '%s' AND password = SHA2('%s', 256) AND enable",
232			username, password);
233	sysadm	1.11	if (mysql_query(db, sql) != 0)
234			{
235	sysadm	1.33	log_error("Query user_list error: %s\n", mysql_error(db));
236	sysadm	1.44	ret = -1;
237			goto cleanup;
238	sysadm	1.11	}
239			if ((rs = mysql_store_result(db)) == NULL)
240	sysadm	1.2	{
241	sysadm	1.11	log_error("Get user_list data failed\n");
242	sysadm	1.44	ret = -1;
243			goto cleanup;
244	sysadm	1.11	}
245	sysadm	1.15	if ((row = mysql_fetch_row(rs)))
246	sysadm	1.11	{
247	sysadm	1.40	BBS_uid = atoi(row[0]);
248	sysadm	1.17	strncpy(BBS_username, row[1], sizeof(BBS_username) - 1);
249			BBS_username[sizeof(BBS_username) - 1] = '\0';
250	sysadm	1.13	int p_login = atoi(row[2]);
251
252			mysql_free_result(rs);
253	sysadm	1.44	rs = NULL;
254	sysadm	1.13
255			// Add user login log
256	sysadm	1.18	snprintf(sql, sizeof(sql),
257	sysadm	1.22	"INSERT INTO user_login_log(UID, login_dt, login_ip) "
258	sysadm	1.40	"VALUES(%d, NOW(), '%s')",
259	sysadm	1.22	BBS_uid, hostaddr_client);
260	sysadm	1.13	if (mysql_query(db, sql) != 0)
261			{
262	sysadm	1.33	log_error("Insert into user_login_log error: %s\n", mysql_error(db));
263	sysadm	1.44	ret = -1;
264			goto cleanup;
265	sysadm	1.13	}
266
267			// Commit transaction
268			if (mysql_query(db, "COMMIT") != 0)
269			{
270	sysadm	1.33	log_error("Commit transaction error: %s\n", mysql_error(db));
271	sysadm	1.44	ret = -1;
272			goto cleanup;
273	sysadm	1.13	}
274
275			if (p_login == 0)
276	sysadm	1.11	{
277	sysadm	1.49	prints("\033[1;31m您目前无权登陆...\033[m\r\n");
278	sysadm	1.44	ret = 1;
279			goto cleanup;
280	sysadm	1.11	}
281			}
282			else
283			{
284			mysql_free_result(rs);
285	sysadm	1.44	rs = NULL;
286	sysadm	1.2
287	sysadm	1.18	snprintf(sql, sizeof(sql),
288	sysadm	1.22	"INSERT INTO user_err_login_log(username, password, login_dt, login_ip) "
289			"VALUES('%s', '%s', NOW(), '%s')",
290			username, password, hostaddr_client);
291	sysadm	1.11	if (mysql_query(db, sql) != 0)
292			{
293	sysadm	1.33	log_error("Insert into user_err_login_log error: %s\n", mysql_error(db));
294	sysadm	1.44	ret = -1;
295			goto cleanup;
296	sysadm	1.11	}
297
298	sysadm	1.13	// Commit transaction
299			if (mysql_query(db, "COMMIT") != 0)
300			{
301	sysadm	1.33	log_error("Commit transaction error: %s\n", mysql_error(db));
302	sysadm	1.44	ret = -1;
303			goto cleanup;
304	sysadm	1.13	}
305
306	sysadm	1.49	prints("\033[1;31m错误的用户名或密码...\033[m\r\n");
307	sysadm	1.44	ret = 1;
308			goto cleanup;
309	sysadm	1.11	}
310	sysadm	1.13
311			// Set AUTOCOMMIT = 1
312			if (mysql_query(db, "SET autocommit=1") != 0)
313			{
314	sysadm	1.33	log_error("SET autocommit=1 error: %s\n", mysql_error(db));
315	sysadm	1.44	ret = -1;
316			goto cleanup;
317	sysadm	1.13	}
318	sysadm	1.2
319	sysadm	1.11	ret = load_user_info(db, BBS_uid);
320
321			switch (ret)
322	sysadm	1.2	{
323	sysadm	1.11	case 0: // Login successfully
324			break;
325			case -1: // Load data error
326	sysadm	1.49	prints("\033[1;31m读取用户数据错误...\033[m\r\n");
327	sysadm	1.44	ret = -1;
328			goto cleanup;
329	sysadm	1.11	case -2: // Unused
330	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");
331	sysadm	1.44	ret = 1;
332			goto cleanup;
333	sysadm	1.11	case -3: // Dead
334	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");
335	sysadm	1.44	ret = 1;
336			goto cleanup;
337	sysadm	1.11	default:
338	sysadm	1.44	ret = -2;
339			goto cleanup;
340	sysadm	1.2	}
341
342	sysadm	1.71	if (!SSH_v2 && checklevel2(&BBS_priv, P_MAN_S))
343			{
344			prints("\033[1;31m非普通账户必须使用SSH方式登录\033[m\r\n");
345			ret = 1;
346			goto cleanup;
347			}
348
349	sysadm	1.18	snprintf(sql, sizeof(sql),
350	sysadm	1.22	"UPDATE user_pubinfo SET visit_count = visit_count + 1, "
351	sysadm	1.40	"last_login_dt = NOW() WHERE UID = %d",
352	sysadm	1.22	BBS_uid);
353	sysadm	1.13	if (mysql_query(db, sql) != 0)
354			{
355	sysadm	1.33	log_error("Update user_pubinfo error: %s\n", mysql_error(db));
356	sysadm	1.44	ret = -1;
357			goto cleanup;
358	sysadm	1.13	}
359
360	sysadm	1.15	if (user_online_add(db) != 0)
361			{
362	sysadm	1.44	ret = -1;
363			goto cleanup;
364	sysadm	1.15	}
365
366	sysadm	1.45	BBS_last_access_tm = BBS_login_tm = time(NULL);
367	sysadm	1.13
368	sysadm	1.34	// Set user tz to process env
369			if (BBS_user_tz[0] != '\0')
370			{
371			user_tz_env[0] = ':';
372			strncpy(user_tz_env + 1, BBS_user_tz, sizeof(user_tz_env) - 2);
373			user_tz_env[sizeof(user_tz_env) - 1] = '\0';
374
375			if (setenv("TZ", user_tz_env, 1) == -1)
376			{
377			log_error("setenv(TZ = %s) error %d\n", user_tz_env, errno);
378			return -3;
379			}
380
381			tzset();
382			}
383
384	sysadm	1.44	cleanup:
385			mysql_free_result(rs);
386	sysadm	1.41	mysql_close(db);
387
388	sysadm	1.44	return ret;
389	sysadm	1.1	}
390	sysadm	1.2
391	sysadm	1.40	int load_user_info(MYSQL *db, int BBS_uid)
392	sysadm	1.3	{
393	sysadm	1.44	MYSQL_RES *rs = NULL;
394	sysadm	1.11	MYSQL_ROW row;
395	sysadm	1.15	char sql[SQL_BUFFER_LEN];
396	sysadm	1.11	int life;
397			time_t last_login_dt;
398	sysadm	1.44	int ret = 0;
399	sysadm	1.11
400	sysadm	1.18	snprintf(sql, sizeof(sql),
401	sysadm	1.43	"SELECT life, UNIX_TIMESTAMP(last_login_dt), user_timezone, exp, nickname "
402	sysadm	1.40	"FROM user_pubinfo WHERE UID = %d",
403	sysadm	1.22	BBS_uid);
404	sysadm	1.11	if (mysql_query(db, sql) != 0)
405			{
406	sysadm	1.33	log_error("Query user_pubinfo error: %s\n", mysql_error(db));
407	sysadm	1.44	ret = -1;
408			goto cleanup;
409	sysadm	1.11	}
410			if ((rs = mysql_store_result(db)) == NULL)
411			{
412			log_error("Get user_pubinfo data failed\n");
413	sysadm	1.44	ret = -1;
414			goto cleanup;
415	sysadm	1.11	}
416	sysadm	1.15	if ((row = mysql_fetch_row(rs)))
417	sysadm	1.11	{
418			life = atoi(row[0]);
419			last_login_dt = (time_t)atol(row[1]);
420	sysadm	1.34
421			strncpy(BBS_user_tz, row[2], sizeof(BBS_user_tz) - 1);
422			BBS_user_tz[sizeof(BBS_user_tz) - 1] = '\0';
423	sysadm	1.43
424			BBS_user_exp = atoi(row[3]);
425
426			strncpy(BBS_nickname, row[4], sizeof(BBS_nickname));
427			BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';
428	sysadm	1.11	}
429			else
430			{
431	sysadm	1.44	ret = -1; // Data not found
432			goto cleanup;
433	sysadm	1.11	}
434			mysql_free_result(rs);
435	sysadm	1.44	rs = NULL;
436	sysadm	1.3
437	sysadm	1.13	if (life != 333 && life != 365 && life != 666 && life != 999 && // Not immortal
438	sysadm	1.45	time(NULL) - last_login_dt > 60 * 60 * 24 * life)
439	sysadm	1.11	{
440	sysadm	1.44	ret = -3; // Dead
441			goto cleanup;
442	sysadm	1.11	}
443	sysadm	1.5
444	sysadm	1.15	if (load_priv(db, &BBS_priv, BBS_uid) != 0)
445			{
446	sysadm	1.44	ret = -1;
447			goto cleanup;
448	sysadm	1.15	}
449	sysadm	1.11
450	sysadm	1.73	if (last_login_dt < BBS_eula_tm)
451			{
452			ret = -2; // require update agreement first
453			goto cleanup;
454			}
455
456	sysadm	1.44	cleanup:
457			mysql_free_result(rs);
458
459			return ret;
460	sysadm	1.2	}
461	sysadm	1.5
462	sysadm	1.41	int load_guest_info(void)
463	sysadm	1.5	{
464	sysadm	1.44	MYSQL *db = NULL;
465			int ret = 0;
466	sysadm	1.41
467			db = db_open();
468			if (db == NULL)
469			{
470	sysadm	1.44	ret = -1;
471			goto cleanup;
472	sysadm	1.41	}
473
474	sysadm	1.17	strncpy(BBS_username, "guest", sizeof(BBS_username) - 1);
475			BBS_username[sizeof(BBS_username) - 1] = '\0';
476	sysadm	1.5
477	sysadm	1.43	BBS_user_exp = 0;
478
479			strncpy(BBS_nickname, "Guest", sizeof(BBS_nickname));
480			BBS_nickname[sizeof(BBS_nickname) - 1] = '\0';
481
482	sysadm	1.15	if (load_priv(db, &BBS_priv, 0) != 0)
483			{
484	sysadm	1.44	ret = -1;
485			goto cleanup;
486	sysadm	1.15	}
487	sysadm	1.6
488	sysadm	1.15	if (user_online_add(db) != 0)
489			{
490	sysadm	1.44	ret = -1;
491			goto cleanup;
492	sysadm	1.15	}
493	sysadm	1.5
494	sysadm	1.45	BBS_last_access_tm = BBS_login_tm = time(NULL);
495	sysadm	1.5
496	sysadm	1.44	cleanup:
497	sysadm	1.41	mysql_close(db);
498	sysadm	1.44
499			return ret;
500	sysadm	1.5	}
501	sysadm	1.15
502			int user_online_add(MYSQL *db)
503			{
504			char sql[SQL_BUFFER_LEN];
505
506	sysadm	1.60	snprintf(sql, sizeof(sql),
507			"INSERT INTO visit_log(dt, IP) VALUES(NOW(), '%s')",
508			hostaddr_client);
509			if (mysql_query(db, sql) != 0)
510			{
511			log_error("Add visit log error: %s\n", mysql_error(db));
512			return -1;
513			}
514
515	sysadm	1.15	if (user_online_del(db) != 0)
516			{
517	sysadm	1.60	return -2;
518	sysadm	1.15	}
519
520	sysadm	1.18	snprintf(sql, sizeof(sql),
521	sysadm	1.61	"INSERT INTO user_online(SID, UID, ip, current_action, login_tm, last_tm) "
522			"VALUES('Telnet_Process_%d', %d, '%s', 'LOGIN', NOW(), NOW())",
523	sysadm	1.22	getpid(), BBS_priv.uid, hostaddr_client);
524	sysadm	1.15	if (mysql_query(db, sql) != 0)
525			{
526	sysadm	1.33	log_error("Add user_online error: %s\n", mysql_error(db));
527	sysadm	1.60	return -3;
528	sysadm	1.15	}
529
530			return 0;
531			}
532
533			int user_online_del(MYSQL *db)
534			{
535			char sql[SQL_BUFFER_LEN];
536
537	sysadm	1.57	snprintf(sql, sizeof(sql),
538			"DELETE FROM user_online WHERE SID = 'Telnet_Process_%d'",
539			getpid());
540			if (mysql_query(db, sql) != 0)
541			{
542			log_error("Delete user_online error: %s\n", mysql_error(db));
543			return -1;
544			}
545
546			return 0;
547			}
548
549			int user_online_exp(MYSQL *db)
550			{
551			char sql[SQL_BUFFER_LEN];
552
553	sysadm	1.56	// +1 exp for every 5 minutes online since last logout
554			// but at most 24 hours worth of exp can be gained in Telnet session
555			snprintf(sql, sizeof(sql),
556	sysadm	1.60	"UPDATE user_pubinfo SET exp = exp + FLOOR(LEAST(TIMESTAMPDIFF("
557			"SECOND, GREATEST(last_login_dt, IF(last_logout_dt IS NULL, last_login_dt, last_logout_dt)), NOW()"
558			") / 60 / 5, 12 * 24)), last_logout_dt = NOW() "
559			"WHERE UID = %d",
560			BBS_priv.uid);
561	sysadm	1.56	if (mysql_query(db, sql) != 0)
562			{
563			log_error("Update user_pubinfo error: %s\n", mysql_error(db));
564			return -1;
565			}
566	sysadm	1.15
567			return 0;
568			}
569	sysadm	1.47
570			int user_online_update(const char *action)
571			{
572			MYSQL *db = NULL;
573			char sql[SQL_BUFFER_LEN];
574
575	sysadm	1.55	if ((action == NULL \|\| strcmp(BBS_current_action, action) == 0) &&
576	sysadm	1.54	time(NULL) - BBS_current_action_tm < BBS_current_action_refresh_interval) // No change
577	sysadm	1.47	{
578			return 0;
579			}
580
581	sysadm	1.55	if (action != NULL)
582			{
583			strncpy(BBS_current_action, action, sizeof(BBS_current_action) - 1);
584			BBS_current_action[sizeof(BBS_current_action) - 1] = '\0';
585			}
586
587	sysadm	1.54	BBS_current_action_tm = time(NULL);
588	sysadm	1.47
589			db = db_open();
590			if (db == NULL)
591			{
592			log_error("db_open() error: %s\n", mysql_error(db));
593			return -1;
594			}
595
596			snprintf(sql, sizeof(sql),
597	sysadm	1.62	"UPDATE user_online SET current_action = '%s', last_tm = NOW() "
598	sysadm	1.47	"WHERE SID = 'Telnet_Process_%d'",
599			BBS_current_action, getpid());
600			if (mysql_query(db, sql) != 0)
601			{
602			log_error("Update user_online error: %s\n", mysql_error(db));
603			return -2;
604			}
605
606			mysql_close(db);
607
608			return 1;
609			}
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