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#pragma once
#include <erebos/network.h>
#include "channel.h"
#include <condition_variable>
#include <mutex>
#include <thread>
#include <vector>
#include <netinet/in.h>
using std::condition_variable;
using std::monostate;
using std::mutex;
using std::optional;
using std::shared_ptr;
using std::string;
using std::thread;
using std::unique_ptr;
using std::variant;
using std::vector;
using std::weak_ptr;
namespace chrono = std::chrono;
using chrono::steady_clock;
namespace erebos {
struct Server::Peer
{
Peer(const Peer &) = delete;
Peer & operator=(const Peer &) = delete;
Priv & server;
const sockaddr_in addr;
variant<monostate,
shared_ptr<struct WaitingRef>,
Identity> identity;
variant<monostate,
Stored<ChannelRequest>,
shared_ptr<struct WaitingRef>,
Stored<ChannelAccept>,
Stored<Channel>> channel;
Storage tempStorage;
PartialStorage partStorage;
void send(const struct TransportHeader &, const vector<Object> &) const;
void updateIdentity(struct ReplyBuilder &);
void updateChannel(struct ReplyBuilder &);
};
struct TransportHeader
{
enum class Type {
Acknowledged,
DataRequest,
DataResponse,
AnnounceSelf,
AnnounceUpdate,
ChannelRequest,
ChannelAccept,
ServiceType,
ServiceRef,
};
struct Item {
const Type type;
const variant<PartialRef, string> value;
};
TransportHeader(const vector<Item> & items): items(items) {}
static optional<TransportHeader> load(const PartialRef &);
static optional<TransportHeader> load(const PartialObject &);
PartialObject toObject() const;
const vector<Item> items;
};
struct WaitingRef
{
const Storage storage;
const PartialRef ref;
const Server::Peer & peer;
vector<Digest> missing;
optional<Ref> check(vector<TransportHeader::Item> * request = nullptr);
};
struct ReplyBuilder
{
vector<TransportHeader::Item> header;
vector<Object> body;
};
struct Server::Priv
{
Priv(const Identity & self);
~Priv();
void doListen();
void doAnnounce();
Peer & getPeer(const sockaddr_in & paddr);
void handlePacket(Peer &, const TransportHeader &, ReplyBuilder &);
constexpr static uint16_t discoveryPort { 29665 };
constexpr static chrono::seconds announceInterval { 60 };
mutex dataMutex;
condition_variable announceCondvar;
bool finish = false;
Identity self;
thread threadListen;
thread threadAnnounce;
vector<unique_ptr<Peer>> peers;
vector<struct TransportHeader> outgoing;
vector<weak_ptr<WaitingRef>> waiting;
int sock;
vector<in_addr> bcastAddresses;
};
}
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