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// Copyright (c) 2021-2022 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 <logging.h>
#include <netaddress.h>
#include <netbase.h>
#include <univalue.h>
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";
/**
* Convert a `banmap_t` object to a JSON array.
* @param[in] bans Bans list to convert.
* @return a JSON array, similar to the one returned by the `listbanned` RPC. Suitable for
* passing to `BanMapFromJson()`.
*/
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(j);
}
return bans_json;
}
/**
* Convert a JSON array to a `banmap_t` object.
* @param[in] bans_json JSON to convert, must be as returned by `BanMapToJson()`.
* @param[out] bans Bans list to create from the JSON.
* @throws std::runtime_error if the JSON does not have the expected fields or they contain
* unparsable values.
*/
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) {
LogPrintf("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()) {
LogPrintf("Dropping entry with unparseable address or subnet (%s) from ban list\n", subnet_str);
continue;
}
bans.insert_or_assign(subnet, CBanEntry{ban_entry_json});
}
}
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