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601 lines
13 KiB
C++
601 lines
13 KiB
C++
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#include "lokinet.h"
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#include "llarp.hpp"
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#include <llarp/config/config.hpp>
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#include <llarp/crypto/crypto_libsodium.hpp>
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#include <llarp/router/abstractrouter.hpp>
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#include <llarp/service/context.hpp>
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#include <llarp/quic/tunnel.hpp>
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#include <llarp/nodedb.hpp>
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#include <mutex>
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namespace
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{
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struct Context : public llarp::Context
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{
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using llarp::Context::Context;
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std::shared_ptr<llarp::NodeDB>
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makeNodeDB() override
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{
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return std::make_shared<llarp::NodeDB>();
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}
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};
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} // namespace
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struct lokinet_context
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{
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std::mutex m_access;
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std::shared_ptr<llarp::Context> impl;
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std::shared_ptr<llarp::Config> config;
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std::unique_ptr<std::thread> runner;
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lokinet_context() : impl{std::make_shared<Context>()}, config{llarp::Config::EmbeddedConfig()}
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{}
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~lokinet_context()
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{
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if (runner)
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runner->join();
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}
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/// acquire mutex for accessing this context
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[[nodiscard]] auto
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acquire()
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{
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return std::unique_lock{m_access};
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}
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[[nodiscard]] auto
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endpoint(std::string name = "default") const
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{
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return impl->router->hiddenServiceContext().GetEndpointByName(name);
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}
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std::unordered_map<int, bool> streams;
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void
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inbound_stream(int id)
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{
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streams[id] = true;
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}
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void
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outbound_stream(int id)
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{
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streams[id] = false;
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}
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};
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namespace
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{
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std::unique_ptr<lokinet_context> g_context;
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void
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stream_error(lokinet_stream_result* result, int err)
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{
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std::memset(result, 0, sizeof(lokinet_stream_result));
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result->error = err;
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}
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void
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stream_okay(lokinet_stream_result* result, std::string host, int port, int stream_id)
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{
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stream_error(result, 0);
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std::copy_n(
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host.c_str(),
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std::min(host.size(), sizeof(result->local_address) - 1),
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result->local_address);
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result->local_port = port;
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result->stream_id = stream_id;
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}
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std::pair<std::string, int>
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split_host_port(std::string data, std::string proto = "tcp")
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{
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std::string host, portStr;
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if (auto pos = data.find(":"); pos != std::string::npos)
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{
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host = data.substr(0, pos);
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portStr = data.substr(pos + 1);
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}
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else
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throw EINVAL;
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if (auto* serv = getservbyname(portStr.c_str(), proto.c_str()))
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{
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return {host, serv->s_port};
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}
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else
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return {host, std::stoi(portStr)};
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}
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int
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accept_port(const char* remote, uint16_t port, void* ptr)
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{
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(void)remote;
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if (port == *static_cast<uint16_t*>(ptr))
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{
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return 0;
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}
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return -1;
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}
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lokinet_srv_record
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SRVFromData(const llarp::dns::SRVData& data, std::string name)
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{
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// TODO: implement me
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(void)data;
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(void)name;
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return {};
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}
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} // namespace
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struct lokinet_srv_lookup_private
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{
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std::vector<lokinet_srv_record> results;
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int
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LookupSRV(std::string host, std::string service, lokinet_context* ctx)
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{
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std::promise<int> promise;
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{
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auto lock = ctx->acquire();
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if (ctx->impl and ctx->impl->IsUp())
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{
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ctx->impl->CallSafe([host, service, &promise, ctx, self = this]() {
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auto ep = ctx->endpoint();
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if (ep == nullptr)
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{
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promise.set_value(ENOTSUP);
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return;
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}
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ep->LookupServiceAsync(host, service, [self, &promise, host](auto results) {
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// for (const auto& result : results)
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// {
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// self->results.emplace_back(SRVFromData(result, host));
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// }
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promise.set_value(0);
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});
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});
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}
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else
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{
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promise.set_value(EHOSTDOWN);
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}
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}
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auto future = promise.get_future();
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return future.get();
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}
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void
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IterateAll(std::function<void(lokinet_srv_record*)> visit)
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{
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for (size_t idx = 0; idx < results.size(); ++idx)
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visit(&results[idx]);
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// null terminator
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visit(nullptr);
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}
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};
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extern "C"
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{
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struct lokinet_context*
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lokinet_default()
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{
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if (not g_context)
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g_context = std::make_unique<lokinet_context>();
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return g_context.get();
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}
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void
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lokinet_set_netid(const char* netid)
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{
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llarp::NetID::DefaultValue() = llarp::NetID{reinterpret_cast<const byte_t*>(netid)};
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}
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const char*
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lokinet_get_netid()
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{
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const auto netid = llarp::NetID::DefaultValue().ToString();
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return strdup(netid.c_str());
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}
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int
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lokinet_log_level(const char* level)
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{
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if (auto maybe = llarp::LogLevelFromString(level))
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{
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llarp::SetLogLevel(*maybe);
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return 0;
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}
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return -1;
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}
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char*
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lokinet_address(struct lokinet_context* ctx)
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{
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if (not ctx)
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return nullptr;
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auto lock = ctx->acquire();
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auto ep = ctx->endpoint();
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const auto addr = ep->GetIdentity().pub.Addr();
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const auto addrStr = addr.ToString();
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return strdup(addrStr.c_str());
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}
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int
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lokinet_add_bootstrap_rc(const char* data, size_t datalen, struct lokinet_context* ctx)
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{
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llarp_buffer_t buf{data, datalen};
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llarp::RouterContact rc{};
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if (ctx == nullptr)
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return -3;
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auto lock = ctx->acquire();
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// add a temp cryptography implementation here so rc.Verify works
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llarp::CryptoManager instance{new llarp::sodium::CryptoLibSodium{}};
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if (not rc.BDecode(&buf))
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return -1;
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if (not rc.Verify(llarp::time_now_ms()))
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return -2;
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ctx->config->bootstrap.routers.insert(std::move(rc));
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return 0;
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}
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struct lokinet_context*
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lokinet_context_new()
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{
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return new lokinet_context{};
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}
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void
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lokinet_context_free(struct lokinet_context* ctx)
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{
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lokinet_context_stop(ctx);
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delete ctx;
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}
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int
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lokinet_context_start(struct lokinet_context* ctx)
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{
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if (not ctx)
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return -1;
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auto lock = ctx->acquire();
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ctx->config->router.m_netId = lokinet_get_netid();
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ctx->config->logging.m_logLevel = llarp::GetLogLevel();
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ctx->runner = std::make_unique<std::thread>([ctx]() {
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llarp::util::SetThreadName("llarp-mainloop");
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ctx->impl->Configure(ctx->config);
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const llarp::RuntimeOptions opts{};
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try
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{
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ctx->impl->Setup(opts);
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#ifdef SIG_PIPE
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signal(SIG_PIPE, SIGIGN);
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#endif
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ctx->impl->Run(opts);
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}
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catch (std::exception& ex)
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{
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std::cerr << ex.what() << std::endl;
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ctx->impl->CloseAsync();
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}
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});
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while (not ctx->impl->IsUp())
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{
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if (ctx->impl->IsStopping())
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return -1;
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std::this_thread::sleep_for(50ms);
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}
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return 0;
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}
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int
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lokinet_status(struct lokinet_context* ctx)
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{
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if (ctx == nullptr)
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return -3;
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auto lock = ctx->acquire();
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if (not ctx->impl->IsUp())
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return -3;
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if (not ctx->impl->LooksAlive())
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return -2;
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return ctx->endpoint()->IsReady() ? 0 : -1;
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}
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int
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lokinet_wait_for_ready(int ms, struct lokinet_context* ctx)
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{
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if (ctx == nullptr)
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return -1;
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auto lock = ctx->acquire();
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auto ep = ctx->endpoint();
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int iterations = ms / 10;
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if (iterations <= 0)
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{
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ms = 10;
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iterations = 1;
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}
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while (not ep->IsReady() and iterations > 0)
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{
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std::this_thread::sleep_for(std::chrono::milliseconds{ms / 10});
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iterations--;
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}
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return ep->IsReady() ? 0 : -1;
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}
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void
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lokinet_context_stop(struct lokinet_context* ctx)
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{
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if (not ctx)
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return;
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auto lock = ctx->acquire();
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if (not ctx->impl->IsStopping())
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{
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ctx->impl->CloseAsync();
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ctx->impl->Wait();
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}
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if (ctx->runner)
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ctx->runner->join();
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ctx->runner.reset();
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}
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void
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lokinet_outbound_stream(
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struct lokinet_stream_result* result,
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const char* remote,
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const char* local,
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struct lokinet_context* ctx)
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{
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if (ctx == nullptr)
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{
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stream_error(result, EHOSTDOWN);
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return;
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}
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std::promise<void> promise;
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{
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auto lock = ctx->acquire();
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if (not ctx->impl->IsUp())
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{
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stream_error(result, EHOSTDOWN);
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return;
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}
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std::string remotehost;
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int remoteport;
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try
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{
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auto [h, p] = split_host_port(remote);
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remotehost = h;
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remoteport = p;
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}
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catch (int err)
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{
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stream_error(result, err);
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return;
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}
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// TODO: make configurable (?)
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std::string endpoint{"default"};
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llarp::SockAddr localAddr;
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try
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{
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if (local)
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localAddr = llarp::SockAddr{std::string{local}};
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else
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localAddr = llarp::SockAddr{"127.0.0.1:0"};
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}
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catch (std::exception& ex)
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{
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stream_error(result, EINVAL);
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return;
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}
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auto call = [&promise,
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ctx,
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result,
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router = ctx->impl->router,
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remotehost,
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remoteport,
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endpoint,
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localAddr]() {
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auto ep = ctx->endpoint();
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if (ep == nullptr)
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{
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stream_error(result, ENOTSUP);
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promise.set_value();
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return;
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}
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auto* quic = ep->GetQUICTunnel();
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if (quic == nullptr)
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{
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stream_error(result, ENOTSUP);
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promise.set_value();
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return;
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}
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try
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{
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auto [addr, id] = quic->open(
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remotehost, remoteport, [](auto) {}, localAddr);
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auto [host, port] = split_host_port(addr.toString());
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ctx->outbound_stream(id);
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stream_okay(result, host, port, id);
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}
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catch (std::exception& ex)
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{
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std::cout << ex.what() << std::endl;
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stream_error(result, ECANCELED);
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}
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catch (int err)
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{
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stream_error(result, err);
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}
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promise.set_value();
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};
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ctx->impl->CallSafe([call]() {
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// we dont want the mainloop to die in case setting the value on the promise fails
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try
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{
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call();
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}
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catch (...)
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{}
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});
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}
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auto future = promise.get_future();
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try
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{
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if (auto status = future.wait_for(std::chrono::seconds{10});
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status == std::future_status::ready)
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{
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future.get();
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}
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else
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{
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stream_error(result, ETIMEDOUT);
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}
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}
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catch (std::exception& ex)
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{
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stream_error(result, EBADF);
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}
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}
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int
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lokinet_inbound_stream(uint16_t port, struct lokinet_context* ctx)
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{
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/// FIXME: delete pointer later
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return lokinet_inbound_stream_filter(&accept_port, (void*)new std::uintptr_t{port}, ctx);
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}
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int
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lokinet_inbound_stream_filter(
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lokinet_stream_filter acceptFilter, void* user, struct lokinet_context* ctx)
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{
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if (acceptFilter == nullptr)
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{
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acceptFilter = [](auto, auto, auto) { return 0; };
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}
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if (not ctx)
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return -1;
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std::promise<int> promise;
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{
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auto lock = ctx->acquire();
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if (not ctx->impl->IsUp())
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{
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return -1;
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}
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ctx->impl->CallSafe([ctx, acceptFilter, user, &promise]() {
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auto ep = ctx->endpoint();
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auto* quic = ep->GetQUICTunnel();
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auto id = quic->listen(
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[acceptFilter, user](auto remoteAddr, auto port) -> std::optional<llarp::SockAddr> {
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std::string remote{remoteAddr};
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if (auto result = acceptFilter(remote.c_str(), port, user))
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{
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if (result == -1)
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{
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throw std::invalid_argument{"rejected"};
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}
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}
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else
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return llarp::SockAddr{"127.0.0.1:" + std::to_string(port)};
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return std::nullopt;
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});
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promise.set_value(id);
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});
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}
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auto ftr = promise.get_future();
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auto id = ftr.get();
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{
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auto lock = ctx->acquire();
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ctx->inbound_stream(id);
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}
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return id;
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}
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void
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lokinet_close_stream(int stream_id, struct lokinet_context* ctx)
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{
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if (not ctx)
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return;
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auto lock = ctx->acquire();
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if (not ctx->impl->IsUp())
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return;
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try
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{
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std::promise<void> promise;
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bool inbound = ctx->streams.at(stream_id);
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ctx->impl->CallSafe([stream_id, inbound, ctx, &promise]() {
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auto ep = ctx->endpoint();
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auto* quic = ep->GetQUICTunnel();
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try
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{
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if (inbound)
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quic->forget(stream_id);
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else
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quic->close(stream_id);
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}
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catch (...)
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{}
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promise.set_value();
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});
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promise.get_future().get();
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}
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catch (...)
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{}
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}
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int
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lokinet_srv_lookup(
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char* host,
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char* service,
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struct lokinet_srv_lookup_result* result,
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struct lokinet_context* ctx)
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{
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if (result == nullptr or ctx == nullptr or host == nullptr or service == nullptr)
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return -1;
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// sanity check, if the caller has not free()'d internals yet free them
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if (result->internal)
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delete result->internal;
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result->internal = new lokinet_srv_lookup_private{};
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return result->internal->LookupSRV(host, service, ctx);
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}
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void
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lokinet_for_each_srv_record(
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struct lokinet_srv_lookup_result* result, lokinet_srv_record_iterator iter, void* user)
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{
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if (result and result->internal)
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{
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result->internal->IterateAll([iter, user](auto* result) { iter(result, user); });
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}
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else
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{
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iter(nullptr, user);
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}
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}
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void
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lokinet_srv_lookup_done(struct lokinet_srv_lookup_result* result)
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{
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if (result == nullptr or result->internal == nullptr)
|
|
return;
|
|
delete result->internal;
|
|
result->internal = nullptr;
|
|
}
|
|
}
|