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src/test/fuzz/asmap.cpp
47 строк
2 KB
Fabian Jahr
refactor: Use span instead of vector for data in util/asmap
21 янв 2026, 01:59
Не верифицирован
21 янв 2026, 01:59
cf4943f
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// Copyright (c) 2020-present 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 <netaddress.h> #include <netgroup.h> #include <test/fuzz/fuzz.h> #include <util/asmap.h> #include <util/strencodings.h> #include <cstdint> #include <vector> using namespace util::hex_literals; //! asmap code that consumes nothing static const std::vector<std::byte> IPV6_PREFIX_ASMAP = {}; //! asmap code that consumes the 96 prefix bits of ::ffff:0/96 (IPv4-in-IPv6 map) static const auto IPV4_PREFIX_ASMAP = "fb03ec0fb03fc0fe00fb03ec0fb03fc0fe00fb03ec0fb0fffffeff"_hex_v; FUZZ_TARGET(asmap) { // Encoding: [7 bits: asmap size] [1 bit: ipv6?] [3-130 bytes: asmap] [4 or 16 bytes: addr] if (buffer.size() < 1 + 3 + 4) return; int asmap_size = 3 + (buffer[0] & 127); bool ipv6 = buffer[0] & 128; const size_t addr_size = ipv6 ? ADDR_IPV6_SIZE : ADDR_IPV4_SIZE; if (buffer.size() < size_t(1 + asmap_size + addr_size)) return; std::vector<std::byte> asmap = ipv6 ? IPV6_PREFIX_ASMAP : IPV4_PREFIX_ASMAP; std::ranges::copy(std::as_bytes(buffer.subspan(1, asmap_size)), std::back_inserter(asmap)); if (!CheckStandardAsmap(asmap)) return; const uint8_t* addr_data = buffer.data() + 1 + asmap_size; CNetAddr net_addr; if (ipv6) { assert(addr_size == ADDR_IPV6_SIZE); net_addr.SetLegacyIPv6({addr_data, addr_size}); } else { assert(addr_size == ADDR_IPV4_SIZE); in_addr ipv4; memcpy(&ipv4, addr_data, addr_size); net_addr.SetIP(CNetAddr{ipv4}); } auto netgroupman{NetGroupManager::WithEmbeddedAsmap(asmap)}; (void)netgroupman.GetMappedAS(net_addr); }