net_types.cpp

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// Copyright (c) 2021-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 <net_types.h>
 
#include <netaddress.h>
#include <netbase.h>
#include <univalue.h>
#include <util/log.h>
 
#include <string>
#include <utility>
#include <vector>
 
static const char* BANMAN_JSON_VERSION_KEY{"version"};
 
CBanEntry::CBanEntry(const UniValue& json)
    : nVersion(json[BANMAN_JSON_VERSION_KEY].getInt<int>()),
      nCreateTime(json["ban_created"].getInt<int64_t>()),
      nBanUntil(json["banned_until"].getInt<int64_t>())
{
}
 
UniValue CBanEntry::ToJson() const
{
    UniValue json(UniValue::VOBJ);
    json.pushKV(BANMAN_JSON_VERSION_KEY, nVersion);
    json.pushKV("ban_created", nCreateTime);
    json.pushKV("banned_until", nBanUntil);
    return json;
}
 
static const char* BANMAN_JSON_ADDR_KEY = "address";
 
UniValue BanMapToJson(const banmap_t& bans)
{
    UniValue bans_json(UniValue::VARR);
    for (const auto& it : bans) {
        const auto& address = it.first;
        const auto& ban_entry = it.second;
        UniValue j = ban_entry.ToJson();
        j.pushKV(BANMAN_JSON_ADDR_KEY, address.ToString());
        bans_json.push_back(std::move(j));
    }
    return bans_json;
}
 
void BanMapFromJson(const UniValue& bans_json, banmap_t& bans)
{
    for (const auto& ban_entry_json : bans_json.getValues()) {
        const int version{ban_entry_json[BANMAN_JSON_VERSION_KEY].getInt<int>()};
        if (version != CBanEntry::CURRENT_VERSION) {
            LogInfo("Dropping entry with unknown version (%s) from ban list\n", version);
            continue;
        }
        const auto& subnet_str = ban_entry_json[BANMAN_JSON_ADDR_KEY].get_str();
        const CSubNet subnet{LookupSubNet(subnet_str)};
        if (!subnet.IsValid()) {
            LogInfo("Dropping entry with unparseable address or subnet (%s) from ban list\n", subnet_str);
            continue;
        }
        bans.insert_or_assign(subnet, CBanEntry{ban_entry_json});
    }
}