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https://github.com/vel21ripn/nDPI.git
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b539b0d090
We are not able to remove custom rules: remove the empty stubs (which originate from the original OpenDPI code). `ndpi_guess_protocol_id()` is only called on the first packet of the flow, so the bitmask `flow->excluded_protocol_bitmask` is always empty, since we didn't call any dissectors yet. Move another hash function to the dedicated source file.
65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
#include "ndpi_api.h"
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#include "fuzz_common_code.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <assert.h>
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#include "fuzzer/FuzzedDataProvider.h"
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extern "C" void cleanup_func(ndpi_str_hash *h) {
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/* Nothing to do */
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return;
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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FuzzedDataProvider fuzzed_data(data, size);
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u_int16_t i, rc, num_iteration, data_len, is_added = 0;
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std::vector<char>value_added;
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void *value;
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ndpi_str_hash *h = NULL;
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/* Just to have some data */
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if (fuzzed_data.remaining_bytes() < 1024)
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return -1;
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/* To allow memory allocation failures */
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fuzz_set_alloc_callbacks_and_seed(size);
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if (fuzzed_data.ConsumeBool())
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ndpi_hash_init(&h);
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else
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ndpi_hash_init(NULL);
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num_iteration = fuzzed_data.ConsumeIntegral<u_int8_t>();
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for (i = 0; i < num_iteration; i++) {
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data_len = fuzzed_data.ConsumeIntegralInRange(0, 127);
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std::vector<char>data = fuzzed_data.ConsumeBytes<char>(data_len);
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rc = ndpi_hash_add_entry(&h, data.data(), data.size(), &i);
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/* Keep one random entry really added */
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if (rc == 0 && fuzzed_data.ConsumeBool()) {
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value_added = data;
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is_added = 1;
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}
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}
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/* "Random" search */
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num_iteration = fuzzed_data.ConsumeIntegral<u_int8_t>();
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for (i = 0; i < num_iteration; i++) {
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data_len = fuzzed_data.ConsumeIntegralInRange(0, 127);
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std::vector<char>data = fuzzed_data.ConsumeBytes<char>(data_len);
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ndpi_hash_find_entry(h, data.data(), data.size(), &value);
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}
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/* Search of an added entry */
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if (is_added) {
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ndpi_hash_find_entry(h, value_added.data(), value_added.size(), &value);
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}
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if (fuzzed_data.ConsumeBool())
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ndpi_hash_free(NULL, cleanup_func);
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ndpi_hash_free(&h, cleanup_func);
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return 0;
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}
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