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/*
* Copyright (c) 2019 Balabit
* Copyright (c) 2019 Kokan <kokaipeter@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "rewrite-set-severity.h"
#include "template/templates.h"
#include "syslog-names.h"
#include "scratch-buffers.h"
#include <stdlib.h>
typedef struct _LogRewriteSetSeverity LogRewriteSetSeverity;
struct _LogRewriteSetSeverity
{
LogRewrite super;
LogTemplate *severity;
};
static gint
_convert_severity_as_number(GString *severity_text)
{
char *endptr;
long int severity = strtol(severity_text->str, &endptr, 10);
if (0 == endptr)
return -1;
if (endptr[0] != '\0' || severity_text->str == endptr)
return -1;
if (severity > 7)
return -1;
return severity;
}
static gint
_convert_severity_as_text(GString *severity_text)
{
return syslog_name_lookup_severity_by_name_alias(severity_text->str, severity_text->len);
}
static gint
_convert_severity(GString *severity_text)
{
gint severity = _convert_severity_as_text(severity_text);
if (severity >= 0)
return severity;
severity = _convert_severity_as_number(severity_text);
if (severity >= 0)
return severity;
return -1;
}
static void
_set_msg_severity(LogMessage *msg, const guint16 severity)
{
msg->pri = (msg->pri & ~SYSLOG_PRIMASK) | severity;
}
static void
log_rewrite_set_severity_process(LogRewrite *s, LogMessage **pmsg, const LogPathOptions *path_options)
{
ScratchBuffersMarker marker;
GString *result = scratch_buffers_alloc_and_mark(&marker);
LogRewriteSetSeverity *self = (LogRewriteSetSeverity *) s;
log_msg_make_writable(pmsg, path_options);
log_template_format(self->severity, *pmsg, &DEFAULT_TEMPLATE_EVAL_OPTIONS, result);
const gint severity = _convert_severity(result);
if (severity < 0)
{
msg_debug("Warning: invalid value passed to set-severity()",
evt_tag_str("severity", result->str),
log_pipe_location_tag(&s->super));
goto error;
}
msg_trace("Setting syslog severity",
evt_tag_int("old_severity", SYSLOG_PRI((*pmsg)->pri)),
evt_tag_int("new_severity", severity),
evt_tag_msg_reference(*pmsg));
_set_msg_severity(*pmsg, severity);
error:
scratch_buffers_reclaim_marked(marker);
}
static LogPipe *
log_rewrite_set_severity_clone(LogPipe *s)
{
LogRewriteSetSeverity *self = (LogRewriteSetSeverity *) s;
LogRewriteSetSeverity *cloned = (LogRewriteSetSeverity *)log_rewrite_set_severity_new(log_template_ref(self->severity),
s->cfg);
log_rewrite_clone_method(&cloned->super, &self->super);
return &cloned->super.super;
}
void
log_rewrite_set_severity_free(LogPipe *s)
{
LogRewriteSetSeverity *self = (LogRewriteSetSeverity *) s;
log_template_unref(self->severity);
log_rewrite_free_method(s);
}
LogRewrite *
log_rewrite_set_severity_new(LogTemplate *severity, GlobalConfig *cfg)
{
LogRewriteSetSeverity *self = g_new0(LogRewriteSetSeverity, 1);
log_rewrite_init_instance(&self->super, cfg);
self->super.super.free_fn = log_rewrite_set_severity_free;
self->super.super.clone = log_rewrite_set_severity_clone;
self->super.process = log_rewrite_set_severity_process;
self->severity = log_template_ref(severity);
return &self->super;
}
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