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90 lines
3.2 KiB
C++
90 lines
3.2 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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/*
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Copyright (C) 2023 The Falco Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#pragma once
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#include "rule_loader.h"
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#include "rule_loader_compile_output.h"
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#include "rule_loader_collector.h"
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#include "filter_macro_resolver.h"
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#include "indexed_vector.h"
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#include "falco_rule.h"
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namespace rule_loader {
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/*!
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\brief Compiler for the ruleset loader of the falco engine
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*/
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class compiler {
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public:
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compiler() = default;
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virtual ~compiler() = default;
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compiler(compiler&&) = default;
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compiler& operator=(compiler&&) = default;
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compiler(const compiler&) = default;
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compiler& operator=(const compiler&) = default;
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// Return a new result object, suitable for passing to
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// compile().
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virtual std::unique_ptr<compile_output> new_compile_output();
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/*!
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\brief Compiles a list of falco rules
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*/
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virtual void compile(configuration& cfg, const collector& col, compile_output& out) const;
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protected:
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/*!
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\brief Compile a single condition expression,
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including expanding macro and list references.
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returns true if the condition could be compiled, and sets
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ast_out/filter_out with the compiled filter + ast. Returns false if
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the condition could not be compiled and should be skipped.
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*/
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bool compile_condition(configuration& cfg,
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filter_macro_resolver& macro_resolver,
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indexed_vector<falco_list>& lists,
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const indexed_vector<rule_loader::macro_info>& macros,
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const std::string& condition,
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std::shared_ptr<sinsp_filter_factory> filter_factory,
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const rule_loader::context& cond_ctx,
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const rule_loader::context& parent_ctx,
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bool allow_unknown_fields,
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indexed_vector<falco_macro>& macros_out,
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std::shared_ptr<libsinsp::filter::ast::expr>& ast_out,
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std::shared_ptr<sinsp_filter>& filter_out) const;
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private:
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void compile_list_infos(configuration& cfg,
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const collector& col,
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indexed_vector<falco_list>& out) const;
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void compile_macros_infos(configuration& cfg,
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const collector& col,
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indexed_vector<falco_list>& lists,
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indexed_vector<falco_macro>& out) const;
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void compile_rule_infos(configuration& cfg,
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const collector& col,
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indexed_vector<falco_list>& lists,
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indexed_vector<falco_macro>& macros,
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indexed_vector<falco_rule>& out) const;
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};
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}; // namespace rule_loader
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