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#include "interconnect.h"
#include "interconnect_address.h"
#include "events_local.h"
#include "logging.h"
#include <library/cpp/actors/core/actor_bootstrapped.h>
#include <library/cpp/actors/core/hfunc.h>
#include <library/cpp/actors/dnsresolver/dnsresolver.h>
namespace NActors {
using namespace NActors::NDnsResolver;
class TInterconnectResolveActor
: public TActorBootstrapped<TInterconnectResolveActor>
, public TInterconnectLoggingBase
{
public:
TInterconnectResolveActor(
const TString& host, ui16 port, ui32 nodeId, const TString& defaultAddress,
const TActorId& replyTo, const TActorId& replyFrom, TInstant deadline)
: Host(host)
, NodeId(nodeId)
, Port(port)
, DefaultAddress(defaultAddress)
, ReplyTo(replyTo)
, ReplyFrom(replyFrom)
, Deadline(deadline)
{ }
TInterconnectResolveActor(
const TString& host, ui16 port,
const TActorId& replyTo, const TActorId& replyFrom, TInstant deadline)
: Host(host)
, Port(port)
, ReplyTo(replyTo)
, ReplyFrom(replyFrom)
, Deadline(deadline)
{ }
static constexpr EActivityType ActorActivityType() {
return NAMESERVICE;
}
void Bootstrap() {
TMaybe<TString> errorText;
if (auto addr = ExtractDefaultAddr(errorText)) {
LOG_TRACE_IC("ICR01", "Host: %s, CACHED address: %s", Host.c_str(), DefaultAddress.c_str());
if (NodeId) {
return SendLocalNodeInfoAndDie({{*addr}});
} else {
return SendAddressInfoAndDie(std::move(addr));
}
}
if (errorText) {
SendErrorAndDie(*errorText);
}
auto now = TActivationContext::Now();
if (Deadline < now) {
SendErrorAndDie("Deadline");
return;
}
LOG_DEBUG_IC("ICR02", "Host: %s, RESOLVING address ...", Host.c_str());
Send(MakeDnsResolverActorId(),
NodeId
? static_cast<IEventBase*>(new TEvDns::TEvGetHostByName(Host, AF_UNSPEC))
: static_cast<IEventBase*>(new TEvDns::TEvGetAddr(Host, AF_UNSPEC)),
IEventHandle::FlagTrackDelivery);
if (Deadline != TInstant::Max()) {
Schedule(Deadline, new TEvents::TEvWakeup);
}
Become(&TThis::StateWork);
}
STRICT_STFUNC(StateWork, {
sFunc(TEvents::TEvWakeup, HandleTimeout);
sFunc(TEvents::TEvUndelivered, HandleUndelivered);
hFunc(TEvDns::TEvGetAddrResult, Handle);
hFunc(TEvDns::TEvGetHostByNameResult, Handle);
});
void HandleTimeout() {
SendErrorAndDie("Deadline");
}
void HandleUndelivered() {
SendErrorAndDie("Dns resolver is unavailable");
}
void Handle(TEvDns::TEvGetAddrResult::TPtr& ev) {
if (auto addr = ExtractAddr(ev->Get())) {
SendAddressInfoAndDie(std::move(addr));
} else {
SendErrorAndDie(ev->Get()->ErrorText);
}
}
void Handle(TEvDns::TEvGetHostByNameResult::TPtr& ev) {
auto& msg = *ev->Get();
if (msg.Status) {
SendErrorAndDie(msg.ErrorText);
} else {
std::vector<NInterconnect::TAddress> addresses;
for (const auto& ipv6 : msg.AddrsV6) {
addresses.emplace_back(ipv6, Port);
}
for (const auto& ipv4 : msg.AddrsV4) {
addresses.emplace_back(ipv4, Port);
}
SendLocalNodeInfoAndDie(std::move(addresses));
}
}
void SendAddressInfoAndDie(NAddr::IRemoteAddrPtr addr) {
LOG_DEBUG_IC("ICR03", "Host: %s, RESOLVED address", Host.c_str());
auto reply = new TEvAddressInfo;
reply->Address = std::move(addr);
TActivationContext::Send(new IEventHandle(ReplyTo, ReplyFrom, reply));
PassAway();
}
void SendLocalNodeInfoAndDie(std::vector<NInterconnect::TAddress> addresses) {
LOG_DEBUG_IC("ICR04", "Host: %s, RESOLVED address", Host.c_str());
auto reply = std::make_unique<TEvLocalNodeInfo>();
reply->NodeId = *NodeId;
reply->Addresses = std::move(addresses);
TActivationContext::Send(new IEventHandle(ReplyTo, ReplyFrom, reply.release()));
PassAway();
}
void SendErrorAndDie(const TString& errorText) {
LOG_DEBUG_IC("ICR05", "Host: %s, ERROR resolving: %s", Host.c_str(), errorText.c_str());
auto *event = new TEvResolveError;
event->Explain = errorText;
event->Host = Host;
TActivationContext::Send(new IEventHandle(ReplyTo, ReplyFrom, event));
PassAway();
}
NAddr::IRemoteAddrPtr ExtractAddr(TEvDns::TEvGetAddrResult* msg) {
if (msg->Status == 0) {
if (msg->IsV6()) {
struct sockaddr_in6 sin6;
Zero(sin6);
sin6.sin6_family = AF_INET6;
sin6.sin6_addr = msg->GetAddrV6();
sin6.sin6_port = HostToInet(Port);
return MakeHolder<NAddr::TIPv6Addr>(sin6);
}
if (msg->IsV4()) {
return MakeHolder<NAddr::TIPv4Addr>(TIpAddress(msg->GetAddrV4().s_addr, Port));
}
Y_FAIL("Unexpected result address family");
}
return nullptr;
}
NAddr::IRemoteAddrPtr ExtractDefaultAddr(TMaybe<TString>& errorText) {
if (DefaultAddress) {
NInterconnect::TAddress address(DefaultAddress.data(), Port);
switch (address.GetFamily()) {
case AF_INET:
return MakeHolder<NAddr::TIPv4Addr>(*(sockaddr_in*)address.SockAddr());
case AF_INET6:
return MakeHolder<NAddr::TIPv6Addr>(*(sockaddr_in6*)address.SockAddr());
default:
errorText = "Unsupported default address: " + DefaultAddress;
break;
}
}
return nullptr;
}
private:
const TString Host;
const std::optional<ui32> NodeId;
const ui16 Port;
const TString DefaultAddress;
const TActorId ReplyTo;
const TActorId ReplyFrom;
const TInstant Deadline;
};
IActor* CreateResolveActor(
const TString& host, ui16 port, ui32 nodeId, const TString& defaultAddress,
const TActorId& replyTo, const TActorId& replyFrom, TInstant deadline)
{
return new TInterconnectResolveActor(host, port, nodeId, defaultAddress, replyTo, replyFrom, deadline);
}
IActor* CreateResolveActor(
const TString& host, ui16 port,
const TActorId& replyTo, const TActorId& replyFrom, TInstant deadline)
{
return new TInterconnectResolveActor(host, port, replyTo, replyFrom, deadline);
}
} // namespace NActors
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