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67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
// See the file "COPYING" in the main distribution directory for copyright.
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#pragma once
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#include <string>
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#include "Val.h"
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#include "File.h"
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#include "Analyzer.h"
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#include "EventHandler.h"
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namespace file_analysis {
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/**
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* An analyzer to send file data to script-layer via events.
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*/
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class DataEvent : public file_analysis::Analyzer {
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public:
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/**
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* Generates the event, if any, specified by the "chunk_event" field of this
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* analyzer's \c AnalyzerArgs. This is for non-sequential file data input.
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* @param data pointer to start of file data chunk.
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* @param len number of bytes in the data chunk.
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* @param offset number of bytes from start of file at which chunk occurs.
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* @return always true
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*/
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bool DeliverChunk(const u_char* data, uint64_t len, uint64_t offset) override;
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/**
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* Generates the event, if any, specified by the "stream_event" field of
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* this analyzer's \c AnalyzerArgs. This is for sequential file data input.
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* @param data pointer to start of file data chunk.
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* @param len number of bytes in the data chunk.
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* @return always true
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*/
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bool DeliverStream(const u_char* data, uint64_t len) override;
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/**
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* Create a new instance of a DataEvent analyzer.
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* @param args the \c AnalyzerArgs value which represents the analyzer.
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* @param file the file to which the analyzer will be attached.
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* @return the new DataEvent analyzer instance or a null pointer if
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* no "chunk_event" or "stream_event" field was specfied in \a args.
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*/
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static file_analysis::Analyzer* Instantiate(RecordVal* args, File* file);
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protected:
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/**
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* Constructor.
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* @param args the \c AnalyzerArgs value which represents the analyzer.
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* @param file the file to which the analyzer will be attached.
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* @param ce pointer to event handler which will be called to receive
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* non-sequential file data.
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* @param se pointer to event handler which will be called to receive
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* sequential file data.
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*/
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DataEvent(RecordVal* args, File* file,
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EventHandlerPtr ce, EventHandlerPtr se);
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private:
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EventHandlerPtr chunk_event;
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EventHandlerPtr stream_event;
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};
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} // namespace file_analysis
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