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#ifndef LLARP_ROUTER_HPP
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#define LLARP_ROUTER_HPP
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#include <llarp/dht.h>
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#include <llarp/nodedb.h>
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#include <llarp/router_contact.h>
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#include <llarp/path.hpp>
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#include <functional>
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#include <list>
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#include <map>
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#include <unordered_map>
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#include <llarp/dht.hpp>
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#include <llarp/link_message.hpp>
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#include <llarp/routing/handler.hpp>
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#include "llarp/iwp/establish_job.hpp"
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#include "crypto.hpp"
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#include "fs.hpp"
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#include "mem.hpp"
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/** 2^15 bytes */
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#define MAX_LINK_MSG_SIZE (32768)
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// TODO: unused. remove?
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// struct try_connect_ctx
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// {
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// llarp_router *router = nullptr;
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// llarp_ai addr;
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// };
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// // forward declare
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// namespace path
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// {
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// struct TransitHop;
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// }
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struct llarp_link;
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struct llarp_link_session_iter;
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bool
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llarp_findOrCreateEncryption(llarp_crypto *crypto, const char *fpath,
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llarp::SecretKey *encryption);
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struct llarp_router
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{
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bool ready;
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// transient iwp encryption key
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fs::path transport_keyfile = "transport.key";
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// nodes to connect to on startup
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std::map< std::string, fs::path > connect;
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// long term identity key
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fs::path ident_keyfile = "identity.key";
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fs::path encryption_keyfile = "encryption.key";
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// path to write our self signed rc to
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fs::path our_rc_file = "rc.signed";
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// our router contact
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llarp_rc rc;
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// our ipv4 public setting
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bool publicOverride = false;
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struct sockaddr_in ip4addr;
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llarp_ai addrInfo;
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llarp_ev_loop *netloop;
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llarp_threadpool *tp;
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llarp_logic *logic;
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llarp_crypto crypto;
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llarp::path::PathContext paths;
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llarp::SecretKey identity;
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llarp::SecretKey encryption;
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llarp_threadpool *disk;
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llarp_dht_context *dht = nullptr;
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llarp_nodedb *nodedb;
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// buffer for serializing link messages
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byte_t linkmsg_buffer[MAX_LINK_MSG_SIZE];
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// should we be sending padded messages every interval?
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bool sendPadding = false;
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uint32_t ticker_job_id = 0;
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llarp::InboundMessageParser inbound_link_msg_parser;
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llarp::routing::InboundMessageParser inbound_routing_msg_parser;
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llarp_pathbuilder_select_hop_func selectHopFunc = nullptr;
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llarp_pathbuilder_context *explorePool = nullptr;
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llarp_link *outboundLink = nullptr;
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std::list< llarp_link * > inboundLinks;
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typedef std::queue< const llarp::ILinkMessage * > MessageQueue;
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/// outbound message queue
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std::map< llarp::RouterID, MessageQueue > outboundMesssageQueue;
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/// loki verified routers
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std::map< llarp::RouterID, llarp_rc > validRouters;
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std::map< llarp::PubKey, llarp_link_establish_job > pendingEstablishJobs;
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llarp_router();
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virtual ~llarp_router();
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bool
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HandleRecvLinkMessage(struct llarp_link_session *from, llarp_buffer_t msg);
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void
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AddInboundLink(struct llarp_link *link);
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bool
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InitOutboundLink();
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/// initialize us as a service node
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void
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InitServiceNode();
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void
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Close();
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bool
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LoadHiddenServiceConfig(const char *fname);
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bool
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AddHiddenService(const llarp::service::Config::section_t &config);
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bool
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Ready();
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void
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Run();
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static void
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ConnectAll(void *user, uint64_t orig, uint64_t left);
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bool
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EnsureIdentity();
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bool
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EnsureEncryptionKey();
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bool
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SaveRC();
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const byte_t *
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pubkey() const
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{
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return llarp::seckey_topublic(identity);
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}
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bool
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HasPendingConnectJob(const llarp::RouterID &remote);
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void
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try_connect(fs::path rcfile);
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/// send to remote router or queue for sending
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/// returns false on overflow
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/// returns true on successful queue
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/// NOT threadsafe
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/// MUST be called in the logic thread
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bool
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SendToOrQueue(const llarp::RouterID &remote, const llarp::ILinkMessage *msg);
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/// sendto or drop
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void
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SendTo(llarp::RouterID remote, const llarp::ILinkMessage *msg,
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llarp_link *chosen = nullptr);
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/// manually flush outbound message queue for just 1 router
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void
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FlushOutboundFor(const llarp::RouterID &remote, llarp_link *chosen);
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/// manually discard all pending messages to remote router
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void
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DiscardOutboundFor(const llarp::RouterID &remote);
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/// flush outbound message queue
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void
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FlushOutbound();
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/// called by link when a remote session is expunged
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void
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SessionClosed(const llarp::RouterID &remote);
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/// call internal router ticker
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void
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Tick();
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/// schedule ticker to call i ms from now
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void
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ScheduleTicker(uint64_t i = 1000);
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llarp_link *
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GetLinkWithSessionByPubkey(const llarp::RouterID &remote);
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void
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async_verify_RC(llarp_rc *rc, bool isExpectingClient,
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llarp_link_establish_job *job = nullptr);
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static bool
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iter_try_connect(llarp_router_link_iter *i, llarp_router *router,
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llarp_link *l);
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static void
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on_try_connect_result(llarp_link_establish_job *job);
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static void
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connect_job_retry(void *user, uint64_t orig, uint64_t left);
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static void
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on_verify_client_rc(llarp_async_verify_rc *context);
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static void
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on_verify_server_rc(llarp_async_verify_rc *context);
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static void
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handle_router_ticker(void *user, uint64_t orig, uint64_t left);
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static bool
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send_padded_message(struct llarp_link_session_iter *itr,
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struct llarp_link_session *peer);
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static void
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HandleAsyncLoadRCForSendTo(llarp_async_load_rc *async);
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static void
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HandleDHTLookupForSendTo(llarp_router_lookup_job *job);
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static void
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HandleExploritoryPathBuildStarted(llarp_pathbuild_job *job);
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};
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#endif
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