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-rw-r--r--src/network.cpp828
1 files changed, 828 insertions, 0 deletions
diff --git a/src/network.cpp b/src/network.cpp
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index 0000000..7f37cf7
--- /dev/null
+++ b/src/network.cpp
@@ -0,0 +1,828 @@
+#include "network.h"
+
+#include "identity.h"
+#include "network/protocol.h"
+#include "service.h"
+
+#include <algorithm>
+#include <cstring>
+#include <iostream>
+#include <stdexcept>
+
+#include <arpa/inet.h>
+#include <ifaddrs.h>
+#include <net/if.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+using std::get;
+using std::get_if;
+using std::holds_alternative;
+using std::move;
+using std::runtime_error;
+using std::scoped_lock;
+using std::to_string;
+using std::unique_lock;
+
+using namespace erebos;
+
+Server::Server(const Head<LocalState> & head, ServerConfig && config):
+ p(new Priv(head, *head->identity()))
+{
+ p->services.reserve(config.services.size());
+ for (const auto & ctor : config.services)
+ p->services.emplace_back(ctor(*this));
+}
+
+Server:: Server(const std::shared_ptr<Priv> & ptr):
+ p(ptr)
+{
+}
+
+Server::~Server() = default;
+
+const Head<LocalState> & Server::localHead() const
+{
+ return p->localHead;
+}
+
+const Bhv<LocalState> & Server::localState() const
+{
+ return p->localState;
+}
+
+Identity Server::identity() const
+{
+ shared_lock lock(p->selfMutex);
+ return p->self;
+}
+
+Service & Server::svcHelper(const std::type_info & tinfo)
+{
+ for (auto & s : p->services) {
+ auto & sobj = *s;
+ if (typeid(sobj) == tinfo)
+ return sobj;
+ }
+ throw runtime_error("service not found");
+}
+
+PeerList & Server::peerList() const
+{
+ return p->plist;
+}
+
+optional<Peer> Server::peer(const Identity & identity) const
+{
+ scoped_lock lock(p->dataMutex);
+
+ for (auto & peer : p->peers) {
+ const auto & pid = peer->identity;
+ if (holds_alternative<Identity>(pid))
+ if (std::get<Identity>(pid).finalOwner().sameAs(identity))
+ return peer->lpeer;
+ }
+
+ return nullopt;
+}
+
+void Server::addPeer(const string & node) const
+{
+ return addPeer(node, to_string(Priv::discoveryPort));
+}
+
+void Server::addPeer(const string & node, const string & service) const
+{
+ addrinfo hints {};
+ hints.ai_flags = AI_V4MAPPED | AI_ADDRCONFIG;
+ hints.ai_family = AF_INET6;
+ hints.ai_socktype = SOCK_DGRAM;
+ addrinfo *aptr;
+
+ int r = getaddrinfo(node.c_str(), service.c_str(), &hints, &aptr);
+ if (r != 0)
+ throw runtime_error(string("Server::addPeer: getaddrinfo failed: ") + gai_strerror(r));
+
+ unique_ptr<addrinfo, void(*)(addrinfo*)> result { aptr, &freeaddrinfo };
+
+ for (addrinfo * rp = result.get(); rp != nullptr; rp = rp->ai_next) {
+ if (rp->ai_family == AF_INET6) {
+ p->getPeer(*(sockaddr_in6 *)rp->ai_addr);
+ return;
+ }
+ }
+
+ throw runtime_error("Server::addPeer: no suitable peer address found");
+}
+
+
+Peer::Peer(const shared_ptr<Priv> & p): p(p) {}
+Peer::~Peer() = default;
+
+Server Peer::server() const
+{
+ if (auto speer = p->speer.lock())
+ return Server(speer->server.getptr());
+ throw runtime_error("Server no longer running");
+}
+
+const Storage & Peer::tempStorage() const
+{
+ if (auto speer = p->speer.lock())
+ return speer->tempStorage;
+ throw runtime_error("Server no longer running");
+}
+
+const PartialStorage & Peer::partialStorage() const
+{
+ if (auto speer = p->speer.lock())
+ return speer->partStorage;
+ throw runtime_error("Server no longer running");
+}
+
+string Peer::name() const
+{
+ if (auto speer = p->speer.lock()) {
+ if (holds_alternative<Identity>(speer->identity))
+ if (auto name = std::get<Identity>(speer->identity).finalOwner().name())
+ return *name;
+ if (holds_alternative<shared_ptr<WaitingRef>>(speer->identity))
+ return string(std::get<shared_ptr<WaitingRef>>(speer->identity)->ref.digest());
+
+ return addressStr();
+ }
+ return "<server closed>";
+}
+
+optional<Identity> Peer::identity() const
+{
+ if (auto speer = p->speer.lock())
+ if (holds_alternative<Identity>(speer->identity))
+ return std::get<Identity>(speer->identity);
+ return nullopt;
+}
+
+const sockaddr_in6 & Peer::address() const
+{
+ if (auto speer = p->speer.lock())
+ return speer->connection.peerAddress();
+ throw runtime_error("Server no longer running");
+}
+
+string Peer::addressStr() const
+{
+ char buf[INET6_ADDRSTRLEN];
+ const in6_addr & addr = address().sin6_addr;
+
+ if (inet_ntop(AF_INET6, &addr, buf, sizeof(buf))) {
+ if (IN6_IS_ADDR_V4MAPPED(&addr) && strncmp(buf, "::ffff:", 7) == 0)
+ return buf + 7;
+ return buf;
+ }
+
+ return "<invalid address>";
+}
+
+uint16_t Peer::port() const
+{
+ return ntohs(address().sin6_port);
+}
+
+void Peer::Priv::notifyWatchers()
+{
+ if (auto slist = list.lock()) {
+ Peer p(shared_from_this());
+ for (const auto & w : slist->watchers)
+ w(listIndex, &p);
+ }
+}
+
+bool Peer::send(UUID uuid, const Ref & ref) const
+{
+ return send(uuid, ref, *ref);
+}
+
+bool Peer::send(UUID uuid, const Object & obj) const
+{
+ if (auto speer = p->speer.lock()) {
+ auto ref = speer->tempStorage.storeObject(obj);
+ return send(uuid, ref, obj);
+ }
+
+ return false;
+}
+
+bool Peer::send(UUID uuid, const Ref & ref, const Object & obj) const
+{
+ if (auto speer = p->speer.lock()) {
+ NetworkProtocol::Header header({
+ NetworkProtocol::Header::ServiceType { uuid },
+ NetworkProtocol::Header::ServiceRef { ref.digest() },
+ });
+ speer->connection.send(speer->partStorage, move(header), { obj }, true);
+ return true;
+ }
+
+ return false;
+}
+
+bool Peer::operator==(const Peer & other) const { return p == other.p; }
+bool Peer::operator!=(const Peer & other) const { return p != other.p; }
+bool Peer::operator<(const Peer & other) const { return p < other.p; }
+bool Peer::operator<=(const Peer & other) const { return p <= other.p; }
+bool Peer::operator>(const Peer & other) const { return p > other.p; }
+bool Peer::operator>=(const Peer & other) const { return p >= other.p; }
+
+
+PeerList::PeerList(): p(new Priv) {}
+PeerList::PeerList(const shared_ptr<PeerList::Priv> & p): p(p) {}
+PeerList::~PeerList() = default;
+
+void PeerList::Priv::push(const shared_ptr<Server::Peer> & speer)
+{
+ scoped_lock lock(dataMutex);
+ size_t s = peers.size();
+
+ speer->lpeer.reset(new Peer::Priv);
+ speer->lpeer->speer = speer;
+ speer->lpeer->list = shared_from_this();
+ speer->lpeer->listIndex = s;
+
+ Peer p(speer->lpeer);
+
+ peers.push_back(speer->lpeer);
+ for (const auto & w : watchers)
+ w(s, &p);
+}
+
+size_t PeerList::size() const
+{
+ return p->peers.size();
+}
+
+Peer PeerList::at(size_t i) const
+{
+ return Peer(p->peers.at(i));
+}
+
+void PeerList::onUpdate(function<void(size_t, const Peer *)> w)
+{
+ scoped_lock lock(p->dataMutex);
+ for (size_t i = 0; i < p->peers.size(); i++) {
+ if (auto speer = p->peers[i]->speer.lock()) {
+ Peer peer(speer->lpeer);
+ w(i, &peer);
+ }
+ }
+ p->watchers.push_back(w);
+}
+
+
+Server::Priv::Priv(const Head<LocalState> & local, const Identity & self):
+ self(self),
+ // Watching needs to start after self is initialized
+ localState(local.behavior()),
+ localHead(local.watch(std::bind(&Priv::handleLocalHeadChange, this, std::placeholders::_1)))
+{
+ struct ifaddrs * raddrs;
+ if (getifaddrs(&raddrs) < 0)
+ throw std::system_error(errno, std::generic_category());
+ unique_ptr<ifaddrs, void(*)(ifaddrs *)> addrs(raddrs, freeifaddrs);
+
+ for (struct ifaddrs * ifa = addrs.get(); ifa; ifa = ifa->ifa_next) {
+ if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET &&
+ ifa->ifa_flags & IFF_BROADCAST) {
+ localAddresses.push_back(((sockaddr_in*)ifa->ifa_addr)->sin_addr);
+ bcastAddresses.push_back(((sockaddr_in*)ifa->ifa_broadaddr)->sin_addr);
+ }
+ }
+
+ int sock = socket(AF_INET6, SOCK_DGRAM, 0);
+ if (sock < 0)
+ throw std::system_error(errno, std::generic_category());
+
+ protocol = NetworkProtocol(sock, self);
+
+ int disable = 0;
+ // Should be disabled by default, but try to make sure. On platforms
+ // where the calls fails, IPv4 might not work.
+ setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
+ &disable, sizeof(disable));
+
+ int enable = 1;
+ if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST,
+ &enable, sizeof(enable)) < 0)
+ throw std::system_error(errno, std::generic_category());
+
+ if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
+ &enable, sizeof(enable)) < 0)
+ throw std::system_error(errno, std::generic_category());
+
+ sockaddr_in6 laddr = {};
+ laddr.sin6_family = AF_INET6;
+ laddr.sin6_port = htons(discoveryPort);
+ if (::bind(sock, (sockaddr *) &laddr, sizeof(laddr)) < 0)
+ throw std::system_error(errno, std::generic_category());
+
+ threadListen = thread([this] { doListen(); });
+ threadAnnounce = thread([this] { doAnnounce(); });
+}
+
+Server::Priv::~Priv()
+{
+ {
+ scoped_lock lock(dataMutex);
+ finish = true;
+ }
+
+ protocol.shutdown();
+
+ announceCondvar.notify_all();
+ threadListen.join();
+ threadAnnounce.join();
+}
+
+shared_ptr<Server::Priv> Server::Priv::getptr()
+{
+ // Creating temporary object, so just use null deleter
+ return shared_ptr<Priv>(this, [](Priv *){});
+}
+
+void Server::Priv::doListen()
+{
+ unique_lock lock(dataMutex);
+
+ for (; !finish; lock.lock()) {
+ lock.unlock();
+
+ Peer * peer = nullptr;
+ auto res = protocol.poll();
+
+ if (holds_alternative<NetworkProtocol::ProtocolClosed>(res))
+ break;
+
+ if (const auto * ann = get_if<NetworkProtocol::ReceivedAnnounce>(&res)) {
+ if (not isSelfAddress(ann->addr))
+ getPeer(ann->addr);
+ }
+
+ if (holds_alternative<NetworkProtocol::NewConnection>(res)) {
+ auto & conn = get<NetworkProtocol::NewConnection>(res).conn;
+ if (not isSelfAddress(conn.peerAddress()))
+ peer = &addPeer(move(conn));
+ }
+
+ if (holds_alternative<NetworkProtocol::ConnectionReadReady>(res)) {
+ peer = findPeer(get<NetworkProtocol::ConnectionReadReady>(res).id);
+ }
+
+ if (!peer)
+ continue;
+
+ if (auto header = peer->connection.receive(peer->partStorage)) {
+ ReplyBuilder reply;
+
+ scoped_lock hlock(dataMutex);
+ shared_lock slock(selfMutex);
+
+ handlePacket(*peer, *header, reply);
+ peer->updateIdentity(reply);
+ peer->updateChannel(reply);
+ peer->updateService(reply);
+
+ if (!reply.header().empty())
+ peer->connection.send(peer->partStorage,
+ NetworkProtocol::Header(reply.header()), reply.body(), false);
+
+ peer->connection.trySendOutQueue();
+ }
+ }
+}
+
+void Server::Priv::doAnnounce()
+{
+ auto pst = self.ref()->storage().derivePartialStorage();
+
+ unique_lock lock(dataMutex);
+ auto lastAnnounce = steady_clock::now() - announceInterval;
+
+ while (!finish) {
+ auto now = steady_clock::now();
+
+ if (lastAnnounce + announceInterval < now) {
+ shared_lock slock(selfMutex);
+
+ for (const auto & in : bcastAddresses) {
+ sockaddr_in sin = {};
+ sin.sin_family = AF_INET;
+ sin.sin_addr = in;
+ sin.sin_port = htons(discoveryPort);
+ protocol.announceTo(sin);
+ }
+
+ lastAnnounce += announceInterval * ((now - lastAnnounce) / announceInterval);
+ }
+
+ announceCondvar.wait_until(lock, lastAnnounce + announceInterval);
+ }
+}
+
+bool Server::Priv::isSelfAddress(const sockaddr_in6 & paddr)
+{
+ if (IN6_IS_ADDR_V4MAPPED(&paddr.sin6_addr))
+ for (const auto & in : localAddresses)
+ if (in.s_addr == *reinterpret_cast<const in_addr_t*>(paddr.sin6_addr.s6_addr + 12) &&
+ ntohs(paddr.sin6_port) == discoveryPort)
+ return true;
+ return false;
+}
+
+Server::Peer * Server::Priv::findPeer(NetworkProtocol::Connection::Id cid) const
+{
+ scoped_lock lock(dataMutex);
+
+ for (auto & peer : peers)
+ if (peer->connection.id() == cid)
+ return peer.get();
+
+ return nullptr;
+}
+
+Server::Peer & Server::Priv::getPeer(const sockaddr_in6 & paddr)
+{
+ scoped_lock lock(dataMutex);
+
+ for (auto & peer : peers)
+ if (memcmp(&peer->connection.peerAddress(), &paddr, sizeof paddr) == 0)
+ return *peer;
+
+ auto st = self.ref()->storage().deriveEphemeralStorage();
+ shared_ptr<Peer> peer(new Peer {
+ .server = *this,
+ .connection = protocol.connect(paddr),
+ .identity = monostate(),
+ .identityUpdates = {},
+ .tempStorage = st,
+ .partStorage = st.derivePartialStorage(),
+ });
+ peers.push_back(peer);
+ plist.p->push(peer);
+ return *peer;
+}
+
+Server::Peer & Server::Priv::addPeer(NetworkProtocol::Connection conn)
+{
+ scoped_lock lock(dataMutex);
+
+ auto st = self.ref()->storage().deriveEphemeralStorage();
+ shared_ptr<Peer> peer(new Peer {
+ .server = *this,
+ .connection = move(conn),
+ .identity = monostate(),
+ .identityUpdates = {},
+ .tempStorage = st,
+ .partStorage = st.derivePartialStorage(),
+ });
+ peers.push_back(peer);
+ plist.p->push(peer);
+ return *peer;
+}
+
+void Server::Priv::handlePacket(Server::Peer & peer, const NetworkProtocol::Header & header, ReplyBuilder & reply)
+{
+ unordered_set<Digest> plaintextRefs;
+ for (const auto & obj : collectStoredObjects(Stored<Object>::load(*self.ref())))
+ plaintextRefs.insert(obj.ref().digest());
+
+ optional<UUID> serviceType;
+
+ for (const auto & item : header.items) {
+ if (const auto * ack = get_if<NetworkProtocol::Header::Acknowledged>(&item)) {
+ const auto & dgst = ack->value;
+ if (holds_alternative<Stored<ChannelAccept>>(peer.connection.channel()) &&
+ std::get<Stored<ChannelAccept>>(peer.connection.channel()).ref().digest() == dgst)
+ peer.finalizeChannel(reply,
+ std::get<Stored<ChannelAccept>>(peer.connection.channel())->data->channel());
+ }
+
+ else if (const auto * req = get_if<NetworkProtocol::Header::DataRequest>(&item)) {
+ const auto & dgst = req->value;
+ if (holds_alternative<unique_ptr<Channel>>(peer.connection.channel()) ||
+ plaintextRefs.find(dgst) != plaintextRefs.end()) {
+ if (auto ref = peer.tempStorage.ref(dgst)) {
+ reply.header({ NetworkProtocol::Header::DataResponse { ref->digest() } });
+ reply.body(*ref);
+ }
+ }
+ }
+
+ else if (const auto * rsp = get_if<NetworkProtocol::Header::DataResponse>(&item)) {
+ const auto & dgst = rsp->value;
+ if (not holds_alternative<unique_ptr<Channel>>(peer.connection.channel()))
+ reply.header({ NetworkProtocol::Header::Acknowledged { dgst } });
+ for (auto & pwref : waiting) {
+ if (auto wref = pwref.lock()) {
+ if (std::find(wref->missing.begin(), wref->missing.end(), dgst) !=
+ wref->missing.end()) {
+ if (wref->check(reply))
+ pwref.reset();
+ }
+ }
+ }
+ waiting.erase(std::remove_if(waiting.begin(), waiting.end(),
+ [](auto & wref) { return wref.expired(); }), waiting.end());
+ }
+
+ else if (const auto * ann = get_if<NetworkProtocol::Header::AnnounceSelf>(&item)) {
+ const auto & dgst = ann->value;
+ if (dgst != self.ref()->digest() &&
+ holds_alternative<monostate>(peer.identity)) {
+ reply.header({ NetworkProtocol::Header::AnnounceSelf { self.ref()->digest() }});
+
+ shared_ptr<WaitingRef> wref(new WaitingRef {
+ .storage = peer.tempStorage,
+ .ref = peer.partStorage.ref(dgst),
+ .missing = {},
+ });
+ waiting.push_back(wref);
+ peer.identity = wref;
+ wref->check(reply);
+ }
+ }
+
+ else if (const auto * anu = get_if<NetworkProtocol::Header::AnnounceUpdate>(&item)) {
+ if (holds_alternative<Identity>(peer.identity)) {
+ const auto & dgst = anu->value;
+
+ shared_ptr<WaitingRef> wref(new WaitingRef {
+ .storage = peer.tempStorage,
+ .ref = peer.partStorage.ref(dgst),
+ .missing = {},
+ });
+ waiting.push_back(wref);
+ peer.identityUpdates.push_back(wref);
+ wref->check(reply);
+ }
+ }
+
+ else if (const auto * req = get_if<NetworkProtocol::Header::ChannelRequest>(&item)) {
+ const auto & dgst = req->value;
+ reply.header({ NetworkProtocol::Header::Acknowledged { dgst } });
+
+ if (holds_alternative<Stored<ChannelRequest>>(peer.connection.channel()) &&
+ std::get<Stored<ChannelRequest>>(peer.connection.channel()).ref().digest() < dgst) {
+ // TODO: reject request with lower priority
+ }
+
+ else if (holds_alternative<Stored<ChannelAccept>>(peer.connection.channel())) {
+ // TODO: reject when we already sent accept
+ }
+
+ else {
+ shared_ptr<WaitingRef> wref(new WaitingRef {
+ .storage = peer.tempStorage,
+ .ref = peer.partStorage.ref(dgst),
+ .missing = {},
+ });
+ waiting.push_back(wref);
+ peer.connection.channel() = wref;
+ wref->check(reply);
+ }
+ }
+
+ else if (const auto * acc = get_if<NetworkProtocol::Header::ChannelAccept>(&item)) {
+ const auto & dgst = acc->value;
+ if (holds_alternative<Stored<ChannelAccept>>(peer.connection.channel()) &&
+ std::get<Stored<ChannelAccept>>(peer.connection.channel()).ref().digest() < dgst) {
+ // TODO: reject request with lower priority
+ }
+
+ else {
+ auto cres = peer.tempStorage.copy(peer.partStorage.ref(dgst));
+ if (auto r = get_if<Ref>(&cres)) {
+ auto acc = ChannelAccept::load(*r);
+ if (holds_alternative<Identity>(peer.identity) &&
+ acc.isSignedBy(std::get<Identity>(peer.identity).keyMessage())) {
+ reply.header({ NetworkProtocol::Header::Acknowledged { dgst } });
+ peer.finalizeChannel(reply, acc.data->channel());
+ }
+ }
+ }
+ }
+
+ else if (const auto * stype = get_if<NetworkProtocol::Header::ServiceType>(&item)) {
+ if (!serviceType)
+ serviceType = stype->value;
+ }
+
+ else if (const auto * sref = get_if<NetworkProtocol::Header::ServiceRef>(&item)) {
+ if (!serviceType)
+ for (auto & item : header.items)
+ if (const auto * stype = get_if<NetworkProtocol::Header::ServiceType>(&item)) {
+ serviceType = stype->value;
+ break;
+ }
+
+ if (serviceType) {
+ const auto & dgst = sref->value;
+ auto pref = peer.partStorage.ref(dgst);
+
+ shared_ptr<WaitingRef> wref(new WaitingRef {
+ .storage = peer.tempStorage,
+ .ref = pref,
+ .missing = {},
+ });
+ waiting.push_back(wref);
+ peer.serviceQueue.emplace_back(*serviceType, wref);
+ wref->check(reply);
+ }
+ }
+ }
+}
+
+void Server::Priv::handleLocalHeadChange(const Head<LocalState> & head)
+{
+ scoped_lock lock(dataMutex);
+ scoped_lock slock(selfMutex);
+
+ if (auto id = head->identity()) {
+ if (*id != self) {
+ self = *id;
+ protocol.updateIdentity(*id);
+ }
+ }
+}
+
+void Server::Peer::updateIdentity(ReplyBuilder &)
+{
+ if (holds_alternative<shared_ptr<WaitingRef>>(identity)) {
+ if (auto ref = std::get<shared_ptr<WaitingRef>>(identity)->check())
+ if (auto id = Identity::load(*ref)) {
+ identity.emplace<Identity>(*id);
+ if (lpeer)
+ lpeer->notifyWatchers();
+ }
+ }
+ else if (holds_alternative<Identity>(identity)) {
+ if (!identityUpdates.empty()) {
+ decltype(identityUpdates) keep;
+ vector<StoredIdentityPart> updates;
+
+ for (auto wref : identityUpdates) {
+ if (auto ref = wref->check())
+ updates.push_back(StoredIdentityPart::load(*ref));
+ else
+ keep.push_back(move(wref));
+ }
+
+ identityUpdates = move(keep);
+
+ if (!updates.empty()) {
+ auto nid = get<Identity>(identity).update(updates);
+ if (nid != get<Identity>(identity)) {
+ identity = move(nid);
+ if (lpeer)
+ lpeer->notifyWatchers();
+ }
+ }
+ }
+ }
+}
+
+void Server::Peer::updateChannel(ReplyBuilder & reply)
+{
+ if (!holds_alternative<Identity>(identity))
+ return;
+
+ if (holds_alternative<monostate>(connection.channel())) {
+ auto req = Channel::generateRequest(tempStorage,
+ server.self, std::get<Identity>(identity));
+ connection.channel().emplace<Stored<ChannelRequest>>(req);
+ reply.header({ NetworkProtocol::Header::ChannelRequest { req.ref().digest() } });
+ reply.body(req.ref());
+ reply.body(req->data.ref());
+ reply.body(req->data->key.ref());
+ for (const auto & sig : req->sigs)
+ reply.body(sig.ref());
+ }
+
+ if (holds_alternative<shared_ptr<WaitingRef>>(connection.channel())) {
+ if (auto ref = std::get<shared_ptr<WaitingRef>>(connection.channel())->check(reply)) {
+ auto req = Stored<ChannelRequest>::load(*ref);
+ if (holds_alternative<Identity>(identity) &&
+ req->isSignedBy(std::get<Identity>(identity).keyMessage())) {
+ if (auto acc = Channel::acceptRequest(server.self, std::get<Identity>(identity), req)) {
+ connection.channel().emplace<Stored<ChannelAccept>>(*acc);
+ reply.header({ NetworkProtocol::Header::ChannelAccept { acc->ref().digest() } });
+ reply.body(acc->ref());
+ reply.body(acc.value()->data.ref());
+ reply.body(acc.value()->data->key.ref());
+ for (const auto & sig : acc.value()->sigs)
+ reply.body(sig.ref());
+ } else {
+ connection.channel() = monostate();
+ }
+ } else {
+ connection.channel() = monostate();
+ }
+ }
+ }
+}
+
+void Server::Peer::finalizeChannel(ReplyBuilder & reply, unique_ptr<Channel> ch)
+{
+ connection.channel().emplace<unique_ptr<Channel>>(move(ch));
+
+ vector<NetworkProtocol::Header::Item> hitems;
+ for (const auto & r : server.self.extRefs())
+ reply.header(NetworkProtocol::Header::AnnounceUpdate { r.digest() });
+ for (const auto & r : server.self.updates())
+ reply.header(NetworkProtocol::Header::AnnounceUpdate { r.digest() });
+}
+
+void Server::Peer::updateService(ReplyBuilder & reply)
+{
+ decltype(serviceQueue) next;
+ for (auto & x : serviceQueue) {
+ if (auto ref = std::get<1>(x)->check(reply)) {
+ if (lpeer) {
+ Service::Context ctx { nullptr };
+
+ server.localHead.update([&] (const Stored<LocalState> & local) {
+ ctx = Service::Context(new Service::Context::Priv {
+ .ref = *ref,
+ .peer = erebos::Peer(lpeer),
+ .local = local,
+ });
+
+ for (auto & svc : server.services) {
+ if (svc->uuid() == std::get<UUID>(x)) {
+ svc->handle(ctx);
+ break;
+ }
+ }
+
+ return ctx.local();
+ });
+
+ ctx.runAfterCommitHooks();
+ }
+ } else {
+ next.push_back(std::move(x));
+ }
+ }
+ serviceQueue = std::move(next);
+}
+
+
+void ReplyBuilder::header(NetworkProtocol::Header::Item && item)
+{
+ for (const auto & x : mheader)
+ if (x == item)
+ return;
+ mheader.emplace_back(std::move(item));
+}
+
+void ReplyBuilder::body(const Ref & ref)
+{
+ for (const auto & x : mbody)
+ if (x.digest() == ref.digest())
+ return;
+ mbody.push_back(ref);
+}
+
+vector<Object> ReplyBuilder::body() const
+{
+ vector<Object> res;
+ res.reserve(mbody.size());
+ for (const Ref & ref : mbody)
+ res.push_back(*ref);
+ return res;
+}
+
+
+optional<Ref> WaitingRef::check()
+{
+ if (auto r = storage.ref(ref.digest()))
+ return *r;
+
+ auto res = storage.copy(ref);
+ if (auto r = get_if<Ref>(&res))
+ return *r;
+
+ missing = std::get<vector<Digest>>(res);
+ return nullopt;
+}
+
+optional<Ref> WaitingRef::check(ReplyBuilder & reply)
+{
+ if (auto r = check())
+ return r;
+
+ for (const auto & d : missing)
+ reply.header({ NetworkProtocol::Header::DataRequest { d } });
+
+ return nullopt;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-29 04:25:10 +0000