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/*
* Copyright (c) 2002-2013 Balabit
* Copyright (c) 1998-2013 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 "template/repr.h"
LogTemplateElem *
log_template_elem_new_macro(const gchar *text, guint macro, gchar *default_value, gint msg_ref)
{
LogTemplateElem *e;
e = g_new0(LogTemplateElem, 1);
e->type = LTE_MACRO;
e->text_len = strlen(text);
e->text = g_strdup(text);
e->macro = macro;
e->default_value = default_value;
e->msg_ref = msg_ref;
return e;
}
LogTemplateElem *
log_template_elem_new_value(const gchar *text, gchar *value_name, gchar *default_value, gint msg_ref)
{
LogTemplateElem *e;
e = g_new0(LogTemplateElem, 1);
e->type = LTE_VALUE;
e->text_len = strlen(text);
e->text = g_strdup(text);
e->value_handle = log_msg_get_value_handle(value_name);
e->default_value = default_value;
e->msg_ref = msg_ref;
return e;
}
static gboolean
_setup_function_call(LogTemplate *template, Plugin *p, LogTemplateElem *e,
gint argc, gchar *argv[],
GError **error)
{
gchar *argv_copy[argc + 1];
g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
e->func.ops = plugin_construct(p);
e->func.state = e->func.ops->size_of_state > 0 ? g_malloc0(e->func.ops->size_of_state) : NULL;
/* prepare may modify the argv array: remove and rearrange elements */
memcpy(argv_copy, argv, (argc + 1) * sizeof(argv[0]));
if (!e->func.ops->prepare(e->func.ops, e->func.state, template, argc, argv_copy, error))
{
if (e->func.state)
{
e->func.ops->free_state(e->func.state);
g_free(e->func.state);
}
if (e->func.ops->free_fn)
e->func.ops->free_fn(e->func.ops);
return FALSE;
}
g_strfreev(argv);
return TRUE;
}
static gboolean
_lookup_and_setup_function_call(LogTemplate *template, LogTemplateElem *e,
gint argc, gchar *argv[],
GError **error)
{
Plugin *p;
g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
/* the plus one denotes the function name, which'll be removed from argc
* during parsing */
if (argc > TEMPLATE_INVOKE_MAX_ARGS + 1)
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"Too many arguments (%d) to template function \"%s\", "
"maximum number of arguments is %d", argc - 1, argv[0],
TEMPLATE_INVOKE_MAX_ARGS);
goto error;
}
p = cfg_find_plugin(template->cfg, LL_CONTEXT_TEMPLATE_FUNC, argv[0]);
if (!p)
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE, "Unknown template function \"%s\"", argv[0]);
goto error;
}
if (!_setup_function_call(template, p, e, argc, argv, error))
goto error;
return TRUE;
error:
return FALSE;
}
/* NOTE: this steals argv if successful */
LogTemplateElem *
log_template_elem_new_func(LogTemplate *template,
const gchar *text, gint argc, gchar *argv[], gint msg_ref,
GError **error)
{
LogTemplateElem *e;
g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
e = g_malloc0(sizeof(LogTemplateElem) + (argc - 1) * sizeof(LogTemplate *));
e->type = LTE_FUNC;
e->text_len = strlen(text);
e->text = g_strdup(text);
e->msg_ref = msg_ref;
if (!_lookup_and_setup_function_call(template, e, argc, argv, error))
goto error;
return e;
error:
if (e->text)
g_free(e->text);
g_free(e);
return NULL;
}
void
log_template_elem_free(LogTemplateElem *e)
{
switch (e->type)
{
case LTE_FUNC:
if (e->func.state)
{
e->func.ops->free_state(e->func.state);
g_free(e->func.state);
}
if (e->func.ops && e->func.ops->free_fn)
e->func.ops->free_fn(e->func.ops);
break;
default:
break;
}
if (e->default_value)
g_free(e->default_value);
if (e->text)
g_free(e->text);
g_free(e);
}
void
log_template_elem_free_list(GList *l)
{
GList *el = l;
for (; el; el = el->next)
{
log_template_elem_free((LogTemplateElem *) el->data);
}
g_list_free(l);
}
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