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/*
* Copyright (c) 2002-2012 Balabit
* Copyright (c) 1998-2012 Balázs Scheidler
*
* 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/rewrite-expr.h"
/* rewrite */
void
log_rewrite_set_condition(LogRewrite *self, FilterExprNode *condition)
{
self->condition = condition;
}
static void
log_rewrite_queue(LogPipe *s, LogMessage *msg, const LogPathOptions *path_options)
{
LogRewrite *self = (LogRewrite *) s;
msg_trace(">>>>>> rewrite rule evaluation begin",
evt_tag_str("rule", self->name),
log_pipe_location_tag(s),
evt_tag_printf("msg", "%p", msg));
if (self->condition && !filter_expr_eval_root(self->condition, &msg, path_options))
{
msg_trace("Rewrite condition unmatched, skipping rewrite",
evt_tag_str("value", log_msg_get_value_name(self->value_handle, NULL)),
evt_tag_str("rule", self->name),
log_pipe_location_tag(s),
evt_tag_printf("msg", "%p", msg));
}
else
{
self->process(self, &msg, path_options);
}
msg_trace("<<<<<< rewrite rule evaluation finished",
evt_tag_str("rule", self->name),
log_pipe_location_tag(s),
evt_tag_printf("msg", "%p", msg));
log_pipe_forward_msg(s, msg, path_options);
}
gboolean
log_rewrite_init_method(LogPipe *s)
{
LogRewrite *self = (LogRewrite *) s;
GlobalConfig *cfg = log_pipe_get_config(s);
if (self->condition)
filter_expr_init(self->condition, cfg);
if (!self->name)
self->name = cfg_tree_get_rule_name(&cfg->tree, ENC_REWRITE, s->expr_node);
return TRUE;
}
void
log_rewrite_free_method(LogPipe *s)
{
LogRewrite *self = (LogRewrite *) s;
if (self->condition)
filter_expr_unref(self->condition);
g_free(self->name);
log_pipe_free_method(s);
}
void
log_rewrite_init_instance(LogRewrite *self, GlobalConfig *cfg)
{
log_pipe_init_instance(&self->super, cfg);
/* indicate that the rewrite rule is changing the message */
self->super.free_fn = log_rewrite_free_method;
self->super.queue = log_rewrite_queue;
self->super.init = log_rewrite_init_method;
self->value_handle = LM_V_MESSAGE;
}
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