fuzz/fuzz_pcapng_reader.cpp


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#include <cstddef>
#include <cstdint>
#include <cstdio>

#include "packeteer/pcapng/reader.hpp"

// Reader parses file/network data that isn't necessarily our own
// writer's output - a user could point it at any file. fmemopen()
// gives libFuzzer's byte buffer a FILE* without touching a real file.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
    FILE* file = fmemopen(const_cast<uint8_t*>(data), size, "rb");
    if (file == nullptr) return 0;

    packeteer::pcapng::Reader reader(file);
    while (reader.next_packet()) {
        // keep draining until EOF/malformed-block termination
    }

    std::fclose(file);
    return 0;
}