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8275730bf8
Instead of having hard-coded support for syscall/k8s_audit events, use the notions of filter factories/formatter factories to provide generic support for events having a given source: - Within the engine, maps m_filter_factories / m_rulesets / m_format_factories map from a given source to something that can create filters, hold filters, and create formatters for a given source. The hard-coded sinsp_factory/json_factory objects are removed. - The specific add_xxx_filter/process_xxx_event are general purpose and take an event source. - A new method create_formatter() takes a source/output format and provides a shared_ptr to a formatter than can resolve format strings. This is used by the falco outputs code. - In falco main, create the syscall/k8s_audit filter and formatter factories and pass them to the engine. Later, we might make this configurable/selective. With all of the above changes, the falco engine doesn't need a direct inspector any longer, so remove it. Signed-off-by: Mark Stemm <mark.stemm@gmail.com>
98 lines
2.0 KiB
C++
98 lines
2.0 KiB
C++
/*
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Copyright (C) 2019 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 <string>
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#include <exception>
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#include <mutex>
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extern "C" {
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#include "lua.h"
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#include "lualib.h"
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#include "lauxlib.h"
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}
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#include <sinsp.h>
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//
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// Most falco_* classes can throw exceptions. Unless directly related
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// to low-level failures like inability to open file, etc, they will
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// be of this type.
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//
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struct falco_exception : std::exception
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{
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falco_exception()
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{
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}
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virtual ~falco_exception() throw()
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{
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}
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falco_exception(std::string error_str)
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{
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m_error_str = error_str;
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}
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char const* what() const throw()
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{
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return m_error_str.c_str();
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}
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std::string m_error_str;
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};
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//
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// This is the base class of falco_engine/falco_output. It is
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// responsible for managing a lua state and associated inspector and
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// loading a single "main" lua file into that state.
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//
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class falco_common
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{
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public:
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falco_common();
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virtual ~falco_common();
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void init(const char *lua_main_filename, const char *alternate_lua_dir);
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// Priority levels, as a vector of strings
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static std::vector<std::string> priority_names;
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// Same as numbers/indices into the above vector
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enum priority_type
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{
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PRIORITY_EMERGENCY = 0,
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PRIORITY_ALERT = 1,
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PRIORITY_CRITICAL = 2,
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PRIORITY_ERROR = 3,
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PRIORITY_WARNING = 4,
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PRIORITY_NOTICE = 5,
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PRIORITY_INFORMATIONAL = 6,
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PRIORITY_DEBUG = 7
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};
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protected:
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lua_State *m_ls;
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std::mutex m_ls_semaphore;
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private:
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void add_lua_path(std::string &path);
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};
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