git / moonbite-core / src/test/fuzz/asmap_direct.cpp · raw

// Copyright (c) 2020 The Bitcoin Core developers// Distributed under the MIT software license, see the accompanying// file COPYING or http://www.opensource.org/licenses/mit-license.php.#include <test/fuzz/fuzz.h>#include <util/asmap.h>#include <cstdint>#include <optional>#include <vector>#include <assert.h>void test_one_input(const std::vector<uint8_t>& buffer){    // Encoding: [asmap using 1 bit / byte] 0xFF [addr using 1 bit / byte]    std::optional<size_t> sep_pos_opt;    for (size_t pos = 0; pos < buffer.size(); ++pos) {        uint8_t x = buffer[pos];        if ((x & 0xFE) == 0) continue;        if (x == 0xFF) {            if (sep_pos_opt) return;            sep_pos_opt = pos;        } else {            return;        }    }    if (!sep_pos_opt) return; // Needs exactly 1 separator    const size_t sep_pos{sep_pos_opt.value()};    if (buffer.size() - sep_pos - 1 > 128) return; // At most 128 bits in IP address    // Checks on asmap    std::vector<bool> asmap(buffer.begin(), buffer.begin() + sep_pos);    if (SanityCheckASMap(asmap, buffer.size() - 1 - sep_pos)) {        // Verify that for valid asmaps, no prefix (except up to 7 zero padding bits) is valid.        std::vector<bool> asmap_prefix = asmap;        while (!asmap_prefix.empty() && asmap_prefix.size() + 7 > asmap.size() && asmap_prefix.back() == false) {            asmap_prefix.pop_back();        }        while (!asmap_prefix.empty()) {            asmap_prefix.pop_back();            assert(!SanityCheckASMap(asmap_prefix, buffer.size() - 1 - sep_pos));        }        // No address input should trigger assertions in interpreter        std::vector<bool> addr(buffer.begin() + sep_pos + 1, buffer.end());        (void)Interpret(asmap, addr);    }}