--- /dev/null
+/* ulogd_MYSQL.c, Version $Revision: 5875 $
+ *
+ * ulogd output plugin for logging to a MySQL database
+ *
+ * (C) 2000-2001 by Harald Welte <laforge@gnumonks.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * $Id: ulogd_MYSQL.c 5875 2005-08-01 06:49:59Z laforge $
+ *
+ * 15 May 2001, Alex Janssen <alex@ynfonatic.de>:
+ * Added a compability option for older MySQL-servers, which
+ * don't support mysql_real_escape_string
+ *
+ * 17 May 2001, Alex Janssen <alex@ynfonatic.de>:
+ * Added the --with-mysql-log-ip-as-string feature. This will log
+ * IP's as string rather than an unsigned long integer to the database.
+ * See ulogd/doc/mysql.table.ipaddr-as-string as an example.
+ * BE WARNED: This has _WAY_ less performance during table searches.
+ *
+ * 09 Feb 2005, Sven Schuster <schuster.sven@gmx.de>:
+ * Added the "port" parameter to specify ports different from 3306
+ *
+ * 12 May 2005, Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ * Added reconnecting to lost mysql server.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <arpa/inet.h>
+#include <ulogd/ulogd.h>
+#include <ulogd/conffile.h>
+#include <mysql/mysql.h>
+
+#ifdef DEBUG_MYSQL
+#define DEBUGP(x, args...) fprintf(stderr, x, ## args)
+#else
+#define DEBUGP(x, args...)
+#endif
+
+struct _field {
+ char name[ULOGD_MAX_KEYLEN];
+ unsigned int id;
+ struct _field *next;
+};
+
+/* The plugin handler */
+static ulog_output_t mysql_plugin;
+
+/* the database handle we are using */
+static MYSQL *dbh;
+
+/* a linked list of the fields the table has */
+static struct _field *fields;
+
+/* buffer for our insert statement */
+static char *stmt;
+
+/* pointer to the beginning of the "VALUES" part */
+static char *stmt_val;
+
+/* pointer to current inser position in statement */
+static char *stmt_ins;
+
+/* Attempt to reconnect if connection is lost */
+time_t reconnect = 0;
+#define TIME_ERR ((time_t)-1) /* Be paranoid */
+
+/* our configuration directives */
+static config_entry_t db_ce = {
+ .key = "db",
+ .type = CONFIG_TYPE_STRING,
+ .options = CONFIG_OPT_MANDATORY,
+};
+
+static config_entry_t host_ce = {
+ .next = &db_ce,
+ .key = "host",
+ .type = CONFIG_TYPE_STRING,
+ .options = CONFIG_OPT_MANDATORY,
+};
+
+static config_entry_t user_ce = {
+ .next = &host_ce,
+ .key = "user",
+ .type = CONFIG_TYPE_STRING,
+ .options = CONFIG_OPT_MANDATORY,
+};
+
+static config_entry_t pass_ce = {
+ .next = &user_ce,
+ .key = "pass",
+ .type = CONFIG_TYPE_STRING,
+ .options = CONFIG_OPT_MANDATORY,
+};
+
+static config_entry_t table_ce = {
+ .next = &pass_ce,
+ .key = "table",
+ .type = CONFIG_TYPE_STRING,
+ .options = CONFIG_OPT_MANDATORY,
+};
+
+static config_entry_t port_ce = {
+ .next = &table_ce,
+ .key = "port",
+ .type = CONFIG_TYPE_INT,
+};
+
+static config_entry_t reconnect_ce = {
+ .next = &port_ce,
+ .key = "reconnect",
+ .type = CONFIG_TYPE_INT,
+};
+
+static config_entry_t connect_timeout_ce = {
+ .next = &reconnect_ce,
+ .key = "connect_timeout",
+ .type = CONFIG_TYPE_INT,
+};
+
+static int _mysql_init_db(ulog_iret_t *result);
+
+/* our main output function, called by ulogd */
+static int mysql_output(ulog_iret_t *result)
+{
+ struct _field *f;
+ ulog_iret_t *res;
+#ifdef IP_AS_STRING
+ char *tmpstr; /* need this for --log-ip-as-string */
+ struct in_addr addr;
+#endif
+
+ stmt_ins = stmt_val;
+
+ for (f = fields; f; f = f->next) {
+ res = keyh_getres(f->id);
+
+ if (!res) {
+ ulogd_log(ULOGD_NOTICE,
+ "no result for %s ?!?\n", f->name);
+ }
+
+ if (!res || !IS_VALID((*res))) {
+ /* no result, we have to fake something */
+ sprintf(stmt_ins, "NULL,");
+ stmt_ins = stmt + strlen(stmt);
+ continue;
+ }
+
+ switch (res->type) {
+ case ULOGD_RET_INT8:
+ sprintf(stmt_ins, "%d,", res->value.i8);
+ break;
+ case ULOGD_RET_INT16:
+ sprintf(stmt_ins, "%d,", res->value.i16);
+ break;
+ case ULOGD_RET_INT32:
+ sprintf(stmt_ins, "%d,", res->value.i32);
+ break;
+ case ULOGD_RET_INT64:
+ sprintf(stmt_ins, "%lld,", res->value.i64);
+ break;
+ case ULOGD_RET_UINT8:
+ sprintf(stmt_ins, "%u,", res->value.ui8);
+ break;
+ case ULOGD_RET_UINT16:
+ sprintf(stmt_ins, "%u,", res->value.ui16);
+ break;
+ case ULOGD_RET_IPADDR:
+#ifdef IP_AS_STRING
+ memset(&addr, 0, sizeof(addr));
+ addr.s_addr = ntohl(res->value.ui32);
+ *stmt_ins++ = '\'';
+ tmpstr = inet_ntoa(addr);
+#ifdef OLD_MYSQL
+ mysql_escape_string(stmt_ins, tmpstr,
+ strlen(tmpstr));
+#else
+ mysql_real_escape_string(dbh, stmt_ins,
+ tmpstr,
+ strlen(tmpstr));
+#endif /* OLD_MYSQL */
+ stmt_ins = stmt + strlen(stmt);
+ sprintf(stmt_ins, "',");
+ break;
+#endif /* IP_AS_STRING */
+ /* EVIL: fallthrough when logging IP as
+ * u_int32_t */
+ case ULOGD_RET_UINT32:
+ sprintf(stmt_ins, "%u,", res->value.ui32);
+ break;
+ case ULOGD_RET_UINT64:
+ sprintf(stmt_ins, "%llu,", res->value.ui64);
+ break;
+ case ULOGD_RET_BOOL:
+ sprintf(stmt_ins, "'%d',", res->value.b);
+ break;
+ case ULOGD_RET_STRING:
+ *stmt_ins++ = '\'';
+#ifdef OLD_MYSQL
+ mysql_escape_string(stmt_ins, res->value.ptr,
+ strlen(res->value.ptr));
+#else
+ mysql_real_escape_string(dbh, stmt_ins,
+ res->value.ptr, strlen(res->value.ptr));
+#endif
+ stmt_ins = stmt + strlen(stmt);
+ sprintf(stmt_ins, "',");
+ /* sprintf(stmt_ins, "'%s',", res->value.ptr); */
+ break;
+ case ULOGD_RET_RAW:
+ ulogd_log(ULOGD_NOTICE,
+ "%s: type RAW not supported by MySQL\n",
+ res->key);
+ break;
+ default:
+ ulogd_log(ULOGD_NOTICE,
+ "unknown type %d for %s\n",
+ res->type, res->key);
+ break;
+ }
+ stmt_ins = stmt + strlen(stmt);
+ }
+ *(stmt_ins - 1) = ')';
+ DEBUGP("stmt=#%s#\n", stmt);
+
+ /* now we have created our statement, insert it */
+
+ if (mysql_real_query(dbh, stmt, strlen(stmt))) {
+ ulogd_log(ULOGD_ERROR, "sql error during insert: %s\n",
+ mysql_error(dbh));
+ return _mysql_init_db(result);
+ }
+
+ return 0;
+}
+
+/* no connection, plugin disabled */
+static int mysql_output_disabled(ulog_iret_t *result)
+{
+ return 0;
+}
+
+#define MYSQL_INSERTTEMPL "insert into X (Y) values (Z)"
+#define MYSQL_VALSIZE 100
+
+/* create the static part of our insert statement */
+static int mysql_createstmt(void)
+{
+ struct _field *f;
+ unsigned int size;
+ char buf[ULOGD_MAX_KEYLEN];
+ char *underscore;
+
+ if (stmt)
+ free(stmt);
+
+ /* caclulate the size for the insert statement */
+ size = strlen(MYSQL_INSERTTEMPL) + strlen(table_ce.u.string);
+
+ for (f = fields; f; f = f->next) {
+ /* we need space for the key and a comma, as well as
+ * enough space for the values */
+ size += strlen(f->name) + 1 + MYSQL_VALSIZE;
+ }
+
+ ulogd_log(ULOGD_DEBUG, "allocating %u bytes for statement\n", size);
+
+ stmt = (char *) malloc(size);
+
+ if (!stmt) {
+ ulogd_log(ULOGD_ERROR, "OOM!\n");
+ return -1;
+ }
+
+ sprintf(stmt, "insert into %s (", table_ce.u.string);
+ stmt_val = stmt + strlen(stmt);
+
+ for (f = fields; f; f = f->next) {
+ strncpy(buf, f->name, ULOGD_MAX_KEYLEN);
+ while ((underscore = strchr(buf, '.')))
+ *underscore = '_';
+ sprintf(stmt_val, "%s,", buf);
+ stmt_val = stmt + strlen(stmt);
+ }
+ *(stmt_val - 1) = ')';
+
+ sprintf(stmt_val, " values (");
+ stmt_val = stmt + strlen(stmt);
+
+ ulogd_log(ULOGD_DEBUG, "stmt='%s'\n", stmt);
+
+ return 0;
+}
+
+/* find out which columns the table has */
+static int mysql_get_columns(const char *table)
+{
+ MYSQL_RES *result;
+ MYSQL_FIELD *field;
+ char buf[ULOGD_MAX_KEYLEN];
+ char *underscore;
+ struct _field *f;
+ int id;
+
+ if (!dbh)
+ return -1;
+
+ result = mysql_list_fields(dbh, table, NULL);
+ if (!result)
+ return -1;
+
+ /* Cleanup before reconnect */
+ while (fields) {
+ f = fields;
+ fields = f->next;
+ free(f);
+ }
+
+ while ((field = mysql_fetch_field(result))) {
+
+ /* replace all underscores with dots */
+ strncpy(buf, field->name, ULOGD_MAX_KEYLEN);
+ while ((underscore = strchr(buf, '_')))
+ *underscore = '.';
+
+ DEBUGP("field '%s' found: ", buf);
+
+ if (!(id = keyh_getid(buf))) {
+ DEBUGP(" no keyid!\n");
+ continue;
+ }
+
+ DEBUGP("keyid %u\n", id);
+
+ /* prepend it to the linked list */
+ f = (struct _field *) malloc(sizeof *f);
+ if (!f) {
+ ulogd_log(ULOGD_ERROR, "OOM!\n");
+ return -1;
+ }
+ strncpy(f->name, buf, ULOGD_MAX_KEYLEN);
+ f->id = id;
+ f->next = fields;
+ fields = f;
+ }
+
+ mysql_free_result(result);
+ return 0;
+}
+
+/* make connection and select database */
+static int mysql_open_db(char *server, int port, char *user, char *pass,
+ char *db)
+{
+ dbh = mysql_init(NULL);
+ if (!dbh)
+ return -1;
+
+ if (connect_timeout_ce.u.value)
+ mysql_options(dbh, MYSQL_OPT_CONNECT_TIMEOUT, (const char *) &connect_timeout_ce.u.value);
+
+ if (!mysql_real_connect(dbh, server, user, pass, db, port, NULL, 0))
+ return -1;
+
+ return 0;
+}
+
+static int init_reconnect(void)
+{
+ if (reconnect_ce.u.value) {
+ reconnect = time(NULL);
+ if (reconnect != TIME_ERR) {
+ ulogd_log(ULOGD_ERROR, "no connection to database, "
+ "attempting to reconnect "
+ "after %u seconds\n",
+ reconnect_ce.u.value);
+ reconnect += reconnect_ce.u.value;
+ mysql_plugin.output = &_mysql_init_db;
+ return -1;
+ }
+ }
+ /* Disable plugin permanently */
+ mysql_plugin.output = &mysql_output_disabled;
+
+ return 0;
+}
+
+static int _mysql_init_db(ulog_iret_t *result)
+{
+ if (reconnect && reconnect > time(NULL))
+ return 0;
+
+ if (mysql_open_db(host_ce.u.string, port_ce.u.value, user_ce.u.string,
+ pass_ce.u.string, db_ce.u.string)) {
+ ulogd_log(ULOGD_ERROR, "can't establish database connection\n");
+ return init_reconnect();
+ }
+
+ /* read the fieldnames to know which values to insert */
+ if (mysql_get_columns(table_ce.u.string)) {
+ ulogd_log(ULOGD_ERROR, "unable to get mysql columns\n");
+ return init_reconnect();
+ }
+ mysql_createstmt();
+
+ /* enable plugin */
+ mysql_plugin.output = &mysql_output;
+
+ reconnect = 0;
+
+ if (result)
+ return mysql_output(result);
+
+ return 0;
+}
+
+static int _mysql_init(void)
+{
+ /* have the opts parsed */
+ config_parse_file("MYSQL", &connect_timeout_ce);
+
+ return _mysql_init_db(NULL);
+}
+
+static void _mysql_fini(void)
+{
+ mysql_close(dbh);
+}
+
+static ulog_output_t mysql_plugin = {
+ .name = "mysql",
+ .output = &mysql_output,
+ .init = &_mysql_init,
+ .fini = &_mysql_fini,
+};
+
+void _init(void)
+{
+ register_output(&mysql_plugin);
+}
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