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116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/* vi: set et ts=4: */
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/* Copyright (C) 2021 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \file
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*
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* \author Mike Pomraning <mpomraning@qualys.com>
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* \author Jeff Lucovsky <jeff@lucovsky.org>
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*
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* File-like output for logging: syslog
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*/
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#include "suricata-common.h" /* errno.h, string.h, etc. */
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#include "output.h" /* DEFAULT_LOG_* */
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#include "output-eve-syslog.h"
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#include "util-syslog.h"
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#ifdef OS_WIN32
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void SyslogInitialize(void)
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{
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}
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#else /* !OS_WIN32 */
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#define OUTPUT_NAME "syslog"
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typedef struct Context_ {
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int alert_syslog_level;
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} Context;
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static int SyslogInit(ConfNode *conf, bool threaded, void **init_data)
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{
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Context *context = SCCalloc(1, sizeof(Context));
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if (context == NULL) {
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SCLogError(SC_ERR_MEM_ALLOC, "Unable to allocate context for %s", OUTPUT_NAME);
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return -1;
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}
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const char *facility_s = ConfNodeLookupChildValue(conf, "facility");
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if (facility_s == NULL) {
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facility_s = DEFAULT_ALERT_SYSLOG_FACILITY_STR;
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}
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int facility = SCMapEnumNameToValue(facility_s, SCSyslogGetFacilityMap());
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if (facility == -1) {
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SCLogWarning(SC_ERR_INVALID_ARGUMENT,
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"Invalid syslog facility: \"%s\","
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" now using \"%s\" as syslog facility",
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facility_s, DEFAULT_ALERT_SYSLOG_FACILITY_STR);
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facility = DEFAULT_ALERT_SYSLOG_FACILITY;
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}
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const char *level_s = ConfNodeLookupChildValue(conf, "level");
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if (level_s != NULL) {
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int level = SCMapEnumNameToValue(level_s, SCSyslogGetLogLevelMap());
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if (level != -1) {
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context->alert_syslog_level = level;
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}
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}
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const char *ident = ConfNodeLookupChildValue(conf, "identity");
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/* if null we just pass that to openlog, which will then
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* figure it out by itself. */
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openlog(ident, LOG_PID | LOG_NDELAY, facility);
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SCLogNotice("Syslog: facility %s, level %s, ident %s", facility_s, level_s, ident);
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*init_data = context;
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return 0;
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}
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static int SyslogWrite(const char *buffer, int buffer_len, void *init_data, void *thread_data)
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{
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Context *context = init_data;
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syslog(context->alert_syslog_level, "%s", (const char *)buffer);
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return 0;
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}
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static void SyslogDeInit(void *init_data)
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{
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if (init_data) {
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closelog();
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SCFree(init_data);
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}
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}
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void SyslogInitialize(void)
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{
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SCEveFileType *file_type = SCCalloc(1, sizeof(SCEveFileType));
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if (file_type == NULL) {
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FatalError(SC_ERR_MEM_ALLOC, "Unable to allocate memory for eve file type %s", OUTPUT_NAME);
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}
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file_type->name = OUTPUT_NAME;
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file_type->Init = SyslogInit;
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file_type->Deinit = SyslogDeInit;
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file_type->Write = SyslogWrite;
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if (!SCRegisterEveFileType(file_type)) {
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FatalError(SC_ERR_LOG_OUTPUT, "Failed to register EVE file type: %s", OUTPUT_NAME);
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}
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}
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#endif /* !OS_WIN32 */
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