Function FillAddrman

src/test/fuzz/addrman.cpp:90–122

Fill addrman with lots of addresses from lots of sources. */

/** Fill addrman with lots of addresses from lots of sources.  */
void FillAddrman(AddrMan& addrman, FuzzedDataProvider& fuzzed_data_provider)
{
    // Add a fraction of the addresses to the "tried" table.
    // 0, 1, 2, 3 corresponding to 0%, 100%, 50%, 33%
    const size_t n = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 3);

    const size_t num_sources = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(1, 50);
    CNetAddr prev_source;
    // Generate a FastRandomContext seed to use inside the loops instead of
    // fuzzed_data_provider. When fuzzed_data_provider is exhausted it
    // just returns 0.
    FastRandomContext fast_random_context{ConsumeUInt256(fuzzed_data_provider)};
    for (size_t i = 0; i < num_sources; ++i) {
        const auto source = RandAddr(fuzzed_data_provider, fast_random_context);
        const size_t num_addresses = fast_random_context.randrange(500) + 1; // [1..500]

        for (size_t j = 0; j < num_addresses; ++j) {
            const auto addr = CAddress{CService{RandAddr(fuzzed_data_provider, fast_random_context), 8333}, NODE_NETWORK};
            const auto time_penalty = fast_random_context.randrange(100000001);
            addrman.Add({addr}, source, time_penalty);

            if (n > 0 && addrman.size() % n == 0) {
                addrman.Good(addr, GetTime());
            }

            // Add 10% of the addresses from more than one source.
            if (fast_random_context.randrange(10) == 0 && prev_source.IsValid()) {
                addrman.Add({addr}, prev_source, time_penalty);
            }
        }
        prev_source = source;
    }
}

class AddrManDeterministic : public AddrMan
{