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#include "range.h"
#include "util_helpers.h"
#include <library/cpp/int128/int128.h>
#include <util/generic/maybe.h>
#include <util/string/split.h>
#include <util/string/vector.h>
#include <stdexcept>
namespace NIPREG {
namespace {
EAddressFormat CurrentFormat = EAddressFormat::SHORT_IPV6;
void throwExceptionWithFormat(const TString& line) {
throw yexception() << "wanted format: ${ip-begin}-${ip-end}[\t${data}]; $input := '" << line << "'";
}
void throwIfReverseOrder(TAddress first, TAddress last) {
if (first > last) {
const TString err_msg = "reverse order of addresses (first / last) => " + first.AsIPv6() + " / " + last.AsIPv6();
throw std::runtime_error(err_msg.data());
}
}
} // anon-ns
TRange::TRange(TAddress first, TAddress last, const TString& data)
: First(first)
, Last(last)
, Data(data)
{
throwIfReverseOrder(First, Last);
}
TRange::TRange(const TNetwork& net, const TString& data)
: TRange(net.begin, net.end, data)
{
}
ui128 TRange::GetAddrsQty() const {
return TAddress::Distance(First, Last) + 1;
}
TRange TRange::BuildRange(const TString& line, bool isEmptyData, const TString& dataDelim) {
const TVector<TString> parts = StringSplitter(line).SplitBySet(dataDelim.data()).SkipEmpty();
if (parts.empty()) {
throwExceptionWithFormat(line);
}
if (TString::npos != parts[0].find('/')) {
const auto data = (2 == parts.size()) ? parts[1] : "";
return TRange(TNetwork(parts[0]), data);
}
const TVector<TString> range_parts = StringSplitter(parts[0]).SplitBySet(" -\t").SkipEmpty();
if (2 != range_parts.size() || range_parts[0].empty() || range_parts[1].empty()) {
throwExceptionWithFormat(line);
}
if (!isEmptyData && (2 != parts.size() || parts[1].empty())) {
throwExceptionWithFormat(line);
}
const auto& data = (2 == parts.size()) ? parts[1] : "";
return TRange(TAddress::ParseAny(range_parts[0]), TAddress::ParseAny(range_parts[1]), data);
}
bool TRange::Contains(const TRange& range) const {
return First <= range.First && range.Last <= Last;
}
bool TRange::Contains(const TAddress& ip) const {
return First <= ip && ip <= Last;
}
void SetIpFullOutFormat() {
CurrentFormat = EAddressFormat::IPV6;
}
void SetIpShortOutFormat() {
CurrentFormat = EAddressFormat::SHORT_IPV6;
}
void TRange::DumpTo(IOutputStream& output, bool withData, EAddressFormat format) const {
output << First.Format(format) << '-' << Last.Format(format);
if (withData) {
output << '\t' << Data;
}
}
bool TRange::IsIpv6Only() const {
return 6 == First.GetType() && 6 == Last.GetType();
}
bool TRange::IsIpv4Only() const {
return 4 == First.GetType() && 4 == Last.GetType();
}
bool TRange::IsRangeInSingleNet64() const {
return First.GetHigh64() == Last.GetHigh64();
}
TRange TRange::BuildRangeByFirst(const TRange& range, int prefix) {
Y_UNUSED(prefix);
return TRange(TAddress::MakeNet64Prefix(range.First),
TAddress::MakeNet64Broadcast(range.IsRangeInSingleNet64() ? range.Last : range.Last.GetPrevNet64()) ,
range.Data
);
}
TRange TRange::BuildRangeByLast(const TRange& range, int prefix) {
Y_UNUSED(prefix);
const auto prevLast = TAddress::MakeNet64Broadcast(range.Last.GetPrevNet64());
return TRange(range.First, prevLast, range.Data);
// const auto prevLast = TAddress::MakeNet64Broadcast(range.Last);
// return TRange(TAddress::MakeNet64Prefix(range.First), prevLast, range.Data);
}
TVector<TRange> SplitRangeNets(const TRange& origRange, bool addOrigSize, int maskLen) {
Y_UNUSED(maskLen);
static const auto firstCheckedIpv6Prefix = TAddress::ParseAny("2000::");
const auto& CalcNetSize = [&](const TRange& range) {
static const auto MAX_FOR_DIGITS_ANSWER = ui128{1 << 30};
const auto netSize = range.GetAddrsQty();
return (netSize < MAX_FOR_DIGITS_ANSWER) ? ToString(netSize) : "huge";
};
const auto& AddSizeField = [&](TRange& changedRange, const TRange& origAddrRange) {
if (addOrigSize) {
changedRange.Data = AddJsonAttrs({"orig_net_size"}, changedRange.Data, TMaybe<TString>(CalcNetSize(origAddrRange)));
}
};
if (origRange.Last <= firstCheckedIpv6Prefix) {
return {origRange};
}
if (origRange.IsRangeInSingleNet64()) {
TRange theOne{
TAddress::MakeNet64Prefix(origRange.First),
TAddress::MakeNet64Broadcast(origRange.Last),
origRange.Data
};
AddSizeField(theOne, origRange);
return {theOne};
}
TRange range{origRange};
TVector<TRange> result; {
// 1st
TRange byFirst{TAddress::MakeNet64Prefix(range.First),TAddress::MakeNet64Broadcast(range.First), range.Data};
AddSizeField(byFirst, {range.First, byFirst.Last, ""});
result.push_back(byFirst);
// maybe 2nd
range.First = byFirst.Last.Next();
if (!range.IsRangeInSingleNet64()) {
const TAddress lastPrefix = TAddress::MakeNet64Prefix(range.Last);
TRange inTheMiddle{TAddress::MakeNet64Prefix(range.First), lastPrefix.Prev(), range.Data};
AddSizeField(inTheMiddle, inTheMiddle);
result.push_back(inTheMiddle);
range.First = lastPrefix;
}
// the last
TRange byLast{range.First, TAddress::MakeNet64Broadcast(range.Last), range.Data};
AddSizeField(byLast, {byLast.First, range.Last, ""});
result.push_back(byLast);
}
return result;
}
bool operator==(const TRange& lhs, const TRange& rhs) {
return lhs.First == rhs.First && lhs.Last == rhs.Last;
}
} // ns IPREG
IInputStream& operator>>(IInputStream& input, NIPREG::TRange& range) {
TString line;
if (!input.ReadLine(line)) {
throw std::runtime_error("unable to load data from stream");
}
range = NIPREG::TRange::BuildRange(line);
return input;
}
IOutputStream& operator<<(IOutputStream& output, const NIPREG::TRange& range) {
range.DumpTo(output, true, NIPREG::CurrentFormat);
output << "\n";
return output;
}
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