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/*
* Copyright (c) 2019 Pablo Neira Ayuso <pablo@netfilter.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 (or any
* later) as published by the Free Software Foundation.
*/
#include <expression.h>
#include <statement.h>
#include <rule.h>
#include <erec.h>
#include <utils.h>
static unsigned int evaluate_cache_add(struct cmd *cmd)
{
unsigned int completeness = CMD_INVALID;
switch (cmd->obj) {
case CMD_OBJ_SETELEM:
case CMD_OBJ_SET:
case CMD_OBJ_CHAIN:
case CMD_OBJ_FLOWTABLE:
completeness = cmd->op;
break;
case CMD_OBJ_RULE:
/* XXX index is set to zero unless this handle_merge() call is
* invoked, this handle_merge() call is done from the
* evaluation, which is too late.
*/
handle_merge(&cmd->rule->handle, &cmd->handle);
if (cmd->rule->handle.index.id)
completeness = CMD_LIST;
break;
default:
break;
}
return completeness;
}
static unsigned int evaluate_cache_del(struct cmd *cmd)
{
unsigned int completeness = CMD_INVALID;
switch (cmd->obj) {
case CMD_OBJ_SETELEM:
completeness = cmd->op;
break;
default:
break;
}
return completeness;
}
static unsigned int evaluate_cache_flush(struct cmd *cmd)
{
unsigned int completeness = CMD_INVALID;
switch (cmd->obj) {
case CMD_OBJ_SET:
case CMD_OBJ_MAP:
case CMD_OBJ_METER:
completeness = cmd->op;
break;
default:
break;
}
return completeness;
}
static unsigned int evaluate_cache_rename(struct cmd *cmd)
{
unsigned int completeness = CMD_INVALID;
switch (cmd->obj) {
case CMD_OBJ_CHAIN:
completeness = cmd->op;
break;
default:
break;
}
return completeness;
}
int cache_evaluate(struct nft_ctx *nft, struct list_head *cmds)
{
unsigned int echo_completeness = CMD_INVALID;
unsigned int completeness = CMD_INVALID;
struct cmd *cmd;
list_for_each_entry(cmd, cmds, list) {
switch (cmd->op) {
case CMD_ADD:
case CMD_INSERT:
case CMD_REPLACE:
if (nft_output_echo(&nft->output))
echo_completeness = cmd->op;
/* Fall through */
case CMD_CREATE:
completeness = evaluate_cache_add(cmd);
break;
case CMD_DELETE:
completeness = evaluate_cache_del(cmd);
break;
case CMD_GET:
case CMD_LIST:
case CMD_RESET:
case CMD_EXPORT:
case CMD_MONITOR:
completeness = cmd->op;
break;
case CMD_FLUSH:
completeness = evaluate_cache_flush(cmd);
break;
case CMD_RENAME:
completeness = evaluate_cache_rename(cmd);
break;
case CMD_DESCRIBE:
case CMD_IMPORT:
break;
default:
break;
}
}
return max(completeness, echo_completeness);
}
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