216 lines
8.0 KiB
C
216 lines
8.0 KiB
C
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//
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// Created by HuangXin on 2023/4/24.
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//
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#include <sqlite3.h>
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#include "user_errno.h"
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#include "database.h"
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#include "dhcp_network.h"
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#include "rfc2131.h"
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#include "ip_pool.h"
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#include "db_interface.h"
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#include "misc.h"
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#include "zlog_module.h"
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#define DCHP_STEP_TIMEOUT (120)
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#define CREATE_LEASE_TABLE() \
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"CREATE TABLE IF NOT EXISTS lease " \
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" ( id INTEGER PRIMARY KEY AUTOINCREMENT," \
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" uid INTEGER NOT NULL," \
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" mac CHAR(20) NOT NULL," \
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" ip INTEGER NOT NULL," \
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" lease INTEGER NOT NULL," \
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" createTm INTEGER NOT NULL," \
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" netmask INTEGER," \
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" gateway INTEGER," \
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" dns1 INTEGER," \
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" dns2 INTEGER," \
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" server INTEGER NOT NULL," \
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" hostname CHAR(64) DEFAULT '' NOT NULL," \
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" keyType INTEGER NOT NULL" \
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");" \
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"CREATE INDEX IF NOT EXISTS " \
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"lease_index ON lease (uid, mac);"
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#define CREATE_PRE_ASSIGN_TABLE() \
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"CREATE TABLE IF NOT EXISTS pre_assign" \
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" ( id INTEGER PRIMARY KEY AUTOINCREMENT," \
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" uid INTEGER NOT NULL," \
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" xid INTEGER NOT NULL," \
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" hostname CHAR(64) DEFAULT '' NOT NULL," \
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" mac CHAR(20) NOT NULL," \
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" ip CHAR(24) NOT NULL," \
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" lease INTEGER NOT NULL," \
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" netmask CHAR(24)," \
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" gateway CHAR(24)," \
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" dns1 CHAR(24)," \
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" dns2 CHAR(24)," \
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" createTm TIMESTAMP DEFAULT (datetime('now', 'localtime')) NOT NULL" \
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"); CREATE INDEX IF NOT EXISTS pre_assign_index ON pre_assign(ip, uid);"
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#define INSERT_PRE_ASSIGN_ROW_FMT \
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"INSERT INTO pre_assign (uid, xid, hostname, mac, ip, lease, netmask, gateway, dns1, dns2) " \
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"VALUES (%d, %d, '%s', '%s', '%s', %d, '%s', '%s', '%s', '%s');"
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#define GET_PRE_ASSIGN_EXISTS_ROW_FMT \
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"SELECT ip FROM pre_assign WHERE mac = '%s' AND hostname = '%s' AND uid = %d ORDER BY createTm DESC LIMIT 1;"
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#define IP_IS_PRE_ASSIGN_NOT_TIMEOUT_FMT \
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"SELECT (strftime('%%s', 'now', 'localtime') - strftime('%%s', createTm)) as tm FROM pre_assign WHERE ip = " \
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"'%s' AND tm < %d AND uid = %d ORDER BY tm DESC LIMIT 1;"
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#define IP_IS_PRE_ASSIGN "SELECT ip FROM pre_assign WHERE ip = '%s' AND uid = %d"
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#define IP_IS_PRE_ASSIGN_TIMEOUT_FMT \
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"SELECT (strftime('%%s', 'now', 'localtime') - strftime('%%s', createTm)) as tm, id FROM pre_assign WHERE ip = " \
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"'%s' AND tm >= %d AND uid = %d ORDER BY tm DESC LIMIT 1;"
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#define CLS_TIMEOUT_PRE_ASSIGN_ROW_FMT \
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"DELETE FROM pre_assign WHERE (strftime('%%s', 'now', 'localtime') - - strftime('%%s', createTm)) > %d"
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#define UPDATE_CREATE_TIME_BY_ID_FMT "UPDATE pre_assign SET createTm = datetime('now', 'localtime') WHERE id = %s"
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int lease_clearup_timeout_pre_assign() {
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int rc;
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char buf[1024] = {0};
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snprintf(buf, 1024, CLS_TIMEOUT_PRE_ASSIGN_ROW_FMT, DCHP_STEP_TIMEOUT);
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rc = db_sqlite3_sql_exec(CREATE_LEASE_TABLE(), NULL, NULL, NULL);
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if (rc != ERR_SUCCESS) {
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return rc;
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}
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return ERR_SUCCESS;
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}
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int lease_ip_is_pre_assign(U32 uid, U32 ip) {
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int rc;
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char buf[1024] = {0};
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char **dbResult;
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int nRow = 0, nColumn = 0;
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// 判断IP是否存曾经被预分配
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snprintf(buf, 1024, IP_IS_PRE_ASSIGN, u32_to_str_ip(htonl(ip)), uid);
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rc = db_sqlite3_get_rows(buf, &dbResult, &nRow, &nColumn, NULL);
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sqlite3_free_table(dbResult);
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if (rc == ERR_SUCCESS && nRow == 0) {
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// 数据库没有相关记录，直接返回
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LOG_MOD(debug, ZLOG_MOD_DHCPD, "New prepare assign ipaddr %s form user %u\n", u32_to_str_ip(htonl(ip)), uid);
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return FALSE;
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}
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// 判断数据库中该IP是否未超时
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memset(buf, 0, 1024);
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snprintf(buf, 1024, IP_IS_PRE_ASSIGN_NOT_TIMEOUT_FMT, u32_to_str_ip(htonl(ip)), DCHP_STEP_TIMEOUT, uid);
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rc = db_sqlite3_get_rows(buf, &dbResult, &nRow, &nColumn, NULL);
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sqlite3_free_table(dbResult);
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if (rc == ERR_SUCCESS && nRow > 0 && nColumn > 0) {
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// 如果数据库存在记录说明该IP暂时不可以用
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LOG_MOD(debug, ZLOG_MOD_DHCPD, "No free ip address form user %u\n", uid);
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return TRUE;
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}
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// 判断是否有超时预分配的IP， 存在的话可以预分配给其它请求
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memset(buf, 0, 1024);
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snprintf(buf, 1024, IP_IS_PRE_ASSIGN_TIMEOUT_FMT, u32_to_str_ip(htonl(ip)), DCHP_STEP_TIMEOUT, uid);
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rc = db_sqlite3_get_rows(buf, &dbResult, &nRow, &nColumn, NULL);
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if (rc == ERR_SUCCESS && nRow > 0 && nColumn > 0) {
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// 清理超时资源并预分配
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// 更新时间戳
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memset(buf, 0, 1024);
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snprintf(buf, 1024, UPDATE_CREATE_TIME_BY_ID_FMT, dbResult[3]);
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db_sqlite3_sql_exec(buf, NULL, NULL, NULL);
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sqlite3_free_table(dbResult);
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LOG_MOD(debug, ZLOG_MOD_DHCPD, "New prepare assign ipaddr %s form user %u by clearup resource\n", u32_to_str_ip(htonl(ip)), uid);
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return FALSE;
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}
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sqlite3_free_table(dbResult);
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// 处理失败，默认返回
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return TRUE;
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}
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int lease_get_pre_assign(U32 uid, const char *mac, const char *hostname, U32 *preAssign) {
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int rc;
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char buf[1024] = {0};
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char **dbResult;
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int nRow = 0, nColumn = 0;
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snprintf(buf, 1024, GET_PRE_ASSIGN_EXISTS_ROW_FMT, mac, hostname, uid);
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rc = db_sqlite3_get_rows(buf, &dbResult, &nRow, &nColumn, NULL);
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if (rc == ERR_SUCCESS && nRow > 0 && nColumn > 0) {
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if (preAssign) {
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*preAssign = ntohl(inet_addr(dbResult[1]));
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}
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rc = ERR_ITEM_EXISTS;
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} else {
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rc = ERR_ITEM_UNEXISTS;
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}
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sqlite3_free_table(dbResult);
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return rc;
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}
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int lease_db_add_pre_assign(PDHCP_REQ pReq, U32 ip, PIPPOOL_INFO pPool) {
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int rc;
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char buf[1024] = {0};
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char macStr[20] = {0};
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const char *pIp = u32_to_str_ip_safe(htonl(ip));
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const char *pMask = u32_to_str_ip_safe(htonl(pPool->netMask));
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const char *pGw = u32_to_str_ip_safe(htonl(pPool->gwAddr));
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const char *pDns1 = u32_to_str_ip_safe(htonl(pPool->primeDNS));
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const char *pDns2 = u32_to_str_ip_safe(htonl(pPool->salveDNS));
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MAC_TO_STR(pReq->cliMac, macStr);
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snprintf(buf,
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1024,
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INSERT_PRE_ASSIGN_ROW_FMT,
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pReq->uid,
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pReq->xid,
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pReq->hostName,
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macStr,
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pIp,
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pPool->leaseTime,
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pMask,
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pGw,
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pDns1,
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pDns2);
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free((void *)pIp);
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free((void *)pMask);
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free((void *)pGw);
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free((void *)pDns1);
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free((void *)pDns2);
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rc = db_sqlite3_sql_exec(buf, NULL, NULL, NULL);
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if (rc != ERR_SUCCESS) {
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return rc;
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}
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return ERR_SUCCESS;
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}
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int lease_init_database() {
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int rc;
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rc = db_sqlite3_sql_exec(CREATE_LEASE_TABLE(), NULL, NULL, NULL);
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if (rc != ERR_SUCCESS) {
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return rc;
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}
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rc = db_sqlite3_sql_exec(CREATE_PRE_ASSIGN_TABLE(), NULL, NULL, NULL);
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if (rc != ERR_SUCCESS) {
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return rc;
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}
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return ERR_SUCCESS;
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}
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