// Copyright (c) 2009-2010 Satoshi Nakamoto // Copyright (c) 2009-2020 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. #if defined(HAVE_CONFIG_H) #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include const std::function G_TRANSLATION_FUN = nullptr; UrlDecodeFn* const URL_DECODE = urlDecode; static const char DEFAULT_RPCCONNECT[] = "127.0.0.1"; static const int DEFAULT_HTTP_CLIENT_TIMEOUT=900; static const bool DEFAULT_NAMED=false; static const int CONTINUE_EXECUTION=-1; static const std::string ONION{".onion"}; static const size_t ONION_LEN{ONION.size()}; /** Default number of blocks to generate for RPC generatetoaddress. */ static const std::string DEFAULT_NBLOCKS = "1"; static void SetupCliArgs(ArgsManager& argsman) { SetupHelpOptions(argsman); const auto defaultBaseParams = CreateBaseChainParams(CBaseChainParams::MAIN); const auto testnetBaseParams = CreateBaseChainParams(CBaseChainParams::TESTNET); const auto signetBaseParams = CreateBaseChainParams(CBaseChainParams::SIGNET); const auto regtestBaseParams = CreateBaseChainParams(CBaseChainParams::REGTEST); argsman.AddArg("-version", "Print version and exit", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-conf=", strprintf("Specify configuration file. Relative paths will be prefixed by datadir location. (default: %s)", BITCOIN_CONF_FILENAME), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-datadir=", "Specify data directory", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-generate", strprintf("Generate blocks immediately, equivalent to RPC generatenewaddress followed by RPC generatetoaddress. Optional positional integer arguments are number of blocks to generate (default: %s) and maximum iterations to try (default: %s), equivalent to RPC generatetoaddress nblocks and maxtries arguments. Example: bitcoin-cli -generate 4 1000", DEFAULT_NBLOCKS, DEFAULT_MAX_TRIES), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-getinfo", "Get general information from the remote server. Note that unlike server-side RPC calls, the results of -getinfo is the result of multiple non-atomic requests. Some entries in the result may represent results from different states (e.g. wallet balance may be as of a different block from the chain state reported)", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-netinfo", "Get network peer connection information from the remote server. An optional integer argument from 0 to 4 can be passed for different peers listings (default: 0).", ArgsManager::ALLOW_INT, OptionsCategory::OPTIONS); SetupChainParamsBaseOptions(argsman); argsman.AddArg("-named", strprintf("Pass named instead of positional arguments (default: %s)", DEFAULT_NAMED), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-rpcclienttimeout=", strprintf("Timeout in seconds during HTTP requests, or 0 for no timeout. (default: %d)", DEFAULT_HTTP_CLIENT_TIMEOUT), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-rpcconnect=", strprintf("Send commands to node running on (default: %s)", DEFAULT_RPCCONNECT), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-rpccookiefile=", "Location of the auth cookie. Relative paths will be prefixed by a net-specific datadir location. (default: data dir)", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-rpcpassword=", "Password for JSON-RPC connections", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-rpcport=", strprintf("Connect to JSON-RPC on (default: %u, testnet: %u, signet: %u, regtest: %u)", defaultBaseParams->RPCPort(), testnetBaseParams->RPCPort(), signetBaseParams->RPCPort(), regtestBaseParams->RPCPort()), ArgsManager::ALLOW_ANY | ArgsManager::NETWORK_ONLY, OptionsCategory::OPTIONS); argsman.AddArg("-rpcuser=", "Username for JSON-RPC connections", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-rpcwait", "Wait for RPC server to start", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-rpcwallet=", "Send RPC for non-default wallet on RPC server (needs to exactly match corresponding -wallet option passed to bitcoind). This changes the RPC endpoint used, e.g. http://127.0.0.1:8332/wallet/", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-stdin", "Read extra arguments from standard input, one per line until EOF/Ctrl-D (recommended for sensitive information such as passphrases). When combined with -stdinrpcpass, the first line from standard input is used for the RPC password.", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-stdinrpcpass", "Read RPC password from standard input as a single line. When combined with -stdin, the first line from standard input is used for the RPC password. When combined with -stdinwalletpassphrase, -stdinrpcpass consumes the first line, and -stdinwalletpassphrase consumes the second.", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); argsman.AddArg("-stdinwalletpassphrase", "Read wallet passphrase from standard input as a single line. When combined with -stdin, the first line from standard input is used for the wallet passphrase.", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS); } /** libevent event log callback */ static void libevent_log_cb(int severity, const char *msg) { #ifndef EVENT_LOG_ERR // EVENT_LOG_ERR was added in 2.0.19; but before then _EVENT_LOG_ERR existed. # define EVENT_LOG_ERR _EVENT_LOG_ERR #endif // Ignore everything other than errors if (severity >= EVENT_LOG_ERR) { throw std::runtime_error(strprintf("libevent error: %s", msg)); } } // // Exception thrown on connection error. This error is used to determine // when to wait if -rpcwait is given. // class CConnectionFailed : public std::runtime_error { public: explicit inline CConnectionFailed(const std::string& msg) : std::runtime_error(msg) {} }; // // This function returns either one of EXIT_ codes when it's expected to stop the process or // CONTINUE_EXECUTION when it's expected to continue further. // static int AppInitRPC(int argc, char* argv[]) { SetupCliArgs(gArgs); std::string error; if (!gArgs.ParseParameters(argc, argv, error)) { tfm::format(std::cerr, "Error parsing command line arguments: %s\n", error); return EXIT_FAILURE; } if (argc < 2 || HelpRequested(gArgs) || gArgs.IsArgSet("-version")) { std::string strUsage = PACKAGE_NAME " RPC client version " + FormatFullVersion() + "\n"; if (!gArgs.IsArgSet("-version")) { strUsage += "\n" "Usage: bitcoin-cli [options] [params] Send command to " PACKAGE_NAME "\n" "or: bitcoin-cli [options] -named [name=value]... Send command to " PACKAGE_NAME " (with named arguments)\n" "or: bitcoin-cli [options] help List commands\n" "or: bitcoin-cli [options] help Get help for a command\n"; strUsage += "\n" + gArgs.GetHelpMessage(); } tfm::format(std::cout, "%s", strUsage); if (argc < 2) { tfm::format(std::cerr, "Error: too few parameters\n"); return EXIT_FAILURE; } return EXIT_SUCCESS; } if (!CheckDataDirOption()) { tfm::format(std::cerr, "Error: Specified data directory \"%s\" does not exist.\n", gArgs.GetArg("-datadir", "")); return EXIT_FAILURE; } if (!gArgs.ReadConfigFiles(error, true)) { tfm::format(std::cerr, "Error reading configuration file: %s\n", error); return EXIT_FAILURE; } // Check for chain settings (BaseParams() calls are only valid after this clause) try { SelectBaseParams(gArgs.GetChainName()); } catch (const std::exception& e) { tfm::format(std::cerr, "Error: %s\n", e.what()); return EXIT_FAILURE; } return CONTINUE_EXECUTION; } /** Reply structure for request_done to fill in */ struct HTTPReply { HTTPReply(): status(0), error(-1) {} int status; int error; std::string body; }; static std::string http_errorstring(int code) { switch(code) { #if LIBEVENT_VERSION_NUMBER >= 0x02010300 case EVREQ_HTTP_TIMEOUT: return "timeout reached"; case EVREQ_HTTP_EOF: return "EOF reached"; case EVREQ_HTTP_INVALID_HEADER: return "error while reading header, or invalid header"; case EVREQ_HTTP_BUFFER_ERROR: return "error encountered while reading or writing"; case EVREQ_HTTP_REQUEST_CANCEL: return "request was canceled"; case EVREQ_HTTP_DATA_TOO_LONG: return "response body is larger than allowed"; #endif default: return "unknown"; } } static void http_request_done(struct evhttp_request *req, void *ctx) { HTTPReply *reply = static_cast(ctx); if (req == nullptr) { /* If req is nullptr, it means an error occurred while connecting: the * error code will have been passed to http_error_cb. */ reply->status = 0; return; } reply->status = evhttp_request_get_response_code(req); struct evbuffer *buf = evhttp_request_get_input_buffer(req); if (buf) { size_t size = evbuffer_get_length(buf); const char *data = (const char*)evbuffer_pullup(buf, size); if (data) reply->body = std::string(data, size); evbuffer_drain(buf, size); } } #if LIBEVENT_VERSION_NUMBER >= 0x02010300 static void http_error_cb(enum evhttp_request_error err, void *ctx) { HTTPReply *reply = static_cast(ctx); reply->error = err; } #endif /** Class that handles the conversion from a command-line to a JSON-RPC request, * as well as converting back to a JSON object that can be shown as result. */ class BaseRequestHandler { public: virtual ~BaseRequestHandler() {} virtual UniValue PrepareRequest(const std::string& method, const std::vector& args) = 0; virtual UniValue ProcessReply(const UniValue &batch_in) = 0; }; /** Process getinfo requests */ class GetinfoRequestHandler: public BaseRequestHandler { public: const int ID_NETWORKINFO = 0; const int ID_BLOCKCHAININFO = 1; const int ID_WALLETINFO = 2; const int ID_BALANCES = 3; /** Create a simulated `getinfo` request. */ UniValue PrepareRequest(const std::string& method, const std::vector& args) override { if (!args.empty()) { throw std::runtime_error("-getinfo takes no arguments"); } UniValue result(UniValue::VARR); result.push_back(JSONRPCRequestObj("getnetworkinfo", NullUniValue, ID_NETWORKINFO)); result.push_back(JSONRPCRequestObj("getblockchaininfo", NullUniValue, ID_BLOCKCHAININFO)); result.push_back(JSONRPCRequestObj("getwalletinfo", NullUniValue, ID_WALLETINFO)); result.push_back(JSONRPCRequestObj("getbalances", NullUniValue, ID_BALANCES)); return result; } /** Collect values from the batch and form a simulated `getinfo` reply. */ UniValue ProcessReply(const UniValue &batch_in) override { UniValue result(UniValue::VOBJ); const std::vector batch = JSONRPCProcessBatchReply(batch_in); // Errors in getnetworkinfo() and getblockchaininfo() are fatal, pass them on; // getwalletinfo() and getbalances() are allowed to fail if there is no wallet. if (!batch[ID_NETWORKINFO]["error"].isNull()) { return batch[ID_NETWORKINFO]; } if (!batch[ID_BLOCKCHAININFO]["error"].isNull()) { return batch[ID_BLOCKCHAININFO]; } result.pushKV("version", batch[ID_NETWORKINFO]["result"]["version"]); result.pushKV("blocks", batch[ID_BLOCKCHAININFO]["result"]["blocks"]); result.pushKV("headers", batch[ID_BLOCKCHAININFO]["result"]["headers"]); result.pushKV("verificationprogress", batch[ID_BLOCKCHAININFO]["result"]["verificationprogress"]); result.pushKV("timeoffset", batch[ID_NETWORKINFO]["result"]["timeoffset"]); UniValue connections(UniValue::VOBJ); connections.pushKV("in", batch[ID_NETWORKINFO]["result"]["connections_in"]); connections.pushKV("out", batch[ID_NETWORKINFO]["result"]["connections_out"]); connections.pushKV("total", batch[ID_NETWORKINFO]["result"]["connections"]); result.pushKV("connections", connections); result.pushKV("proxy", batch[ID_NETWORKINFO]["result"]["networks"][0]["proxy"]); result.pushKV("difficulty", batch[ID_BLOCKCHAININFO]["result"]["difficulty"]); result.pushKV("chain", UniValue(batch[ID_BLOCKCHAININFO]["result"]["chain"])); if (!batch[ID_WALLETINFO]["result"].isNull()) { result.pushKV("keypoolsize", batch[ID_WALLETINFO]["result"]["keypoolsize"]); if (!batch[ID_WALLETINFO]["result"]["unlocked_until"].isNull()) { result.pushKV("unlocked_until", batch[ID_WALLETINFO]["result"]["unlocked_until"]); } result.pushKV("paytxfee", batch[ID_WALLETINFO]["result"]["paytxfee"]); } if (!batch[ID_BALANCES]["result"].isNull()) { result.pushKV("balance", batch[ID_BALANCES]["result"]["mine"]["trusted"]); } result.pushKV("relayfee", batch[ID_NETWORKINFO]["result"]["relayfee"]); result.pushKV("warnings", batch[ID_NETWORKINFO]["result"]["warnings"]); return JSONRPCReplyObj(result, NullUniValue, 1); } }; /** Process netinfo requests */ class NetinfoRequestHandler : public BaseRequestHandler { private: bool IsAddrIPv6(const std::string& addr) const { return !addr.empty() && addr.front() == '['; } bool IsInboundOnion(const std::string& addr_local, int mapped_as) const { return mapped_as == 0 && addr_local.find(ONION) != std::string::npos; } bool IsOutboundOnion(const std::string& addr, int mapped_as) const { const size_t addr_len{addr.size()}; const size_t onion_pos{addr.rfind(ONION)}; return mapped_as == 0 && onion_pos != std::string::npos && addr_len > ONION_LEN && (onion_pos == addr_len - ONION_LEN || onion_pos == addr.find_last_of(":") - ONION_LEN); } uint8_t m_details_level{0}; //!< Optional user-supplied arg to set dashboard details level bool DetailsRequested() const { return m_details_level > 0 && m_details_level < 5; } bool IsAddressSelected() const { return m_details_level == 2 || m_details_level == 4; } bool IsVersionSelected() const { return m_details_level == 3 || m_details_level == 4; } enum struct NetType { ipv4, ipv6, onion, }; struct Peer { int id; int mapped_as; int version; int64_t conn_time; int64_t last_blck; int64_t last_recv; int64_t last_send; int64_t last_trxn; double min_ping; double ping; std::string addr; std::string sub_version; NetType net_type; bool is_block_relay; bool is_outbound; bool operator<(const Peer& rhs) const { return std::tie(is_outbound, min_ping) < std::tie(rhs.is_outbound, rhs.min_ping); } }; std::string NetTypeEnumToString(NetType t) { switch (t) { case NetType::ipv4: return "ipv4"; case NetType::ipv6: return "ipv6"; case NetType::onion: return "onion"; } // no default case, so the compiler can warn about missing cases assert(false); } std::string ChainToString() const { if (gArgs.GetChainName() == CBaseChainParams::TESTNET) return " testnet"; if (gArgs.GetChainName() == CBaseChainParams::REGTEST) return " regtest"; return ""; } public: const int ID_PEERINFO = 0; const int ID_NETWORKINFO = 1; UniValue PrepareRequest(const std::string& method, const std::vector& args) override { if (!args.empty()) { uint8_t n{0}; if (ParseUInt8(args.at(0), &n)) { m_details_level = n; } } UniValue result(UniValue::VARR); result.push_back(JSONRPCRequestObj("getpeerinfo", NullUniValue, ID_PEERINFO)); result.push_back(JSONRPCRequestObj("getnetworkinfo", NullUniValue, ID_NETWORKINFO)); return result; } UniValue ProcessReply(const UniValue& batch_in) override { const std::vector batch{JSONRPCProcessBatchReply(batch_in)}; if (!batch[ID_PEERINFO]["error"].isNull()) return batch[ID_PEERINFO]; if (!batch[ID_NETWORKINFO]["error"].isNull()) return batch[ID_NETWORKINFO]; const UniValue& networkinfo{batch[ID_NETWORKINFO]["result"]}; if (networkinfo["version"].get_int() < 209900) { throw std::runtime_error("-netinfo requires bitcoind server to be running v0.21.0 and up"); } // Count peer connection totals, and if DetailsRequested(), store peer data in a vector of structs. const int64_t time_now{GetSystemTimeInSeconds()}; int ipv4_i{0}, ipv6_i{0}, onion_i{0}, block_relay_i{0}, total_i{0}; // inbound conn counters int ipv4_o{0}, ipv6_o{0}, onion_o{0}, block_relay_o{0}, total_o{0}; // outbound conn counters size_t max_peer_id_length{2}, max_addr_length{0}; bool is_asmap_on{false}; std::vector peers; const UniValue& getpeerinfo{batch[ID_PEERINFO]["result"]}; for (const UniValue& peer : getpeerinfo.getValues()) { const std::string addr{peer["addr"].get_str()}; const std::string addr_local{peer["addrlocal"].isNull() ? "" : peer["addrlocal"].get_str()}; const int mapped_as{peer["mapped_as"].isNull() ? 0 : peer["mapped_as"].get_int()}; const bool is_block_relay{!peer["relaytxes"].get_bool()}; const bool is_inbound{peer["inbound"].get_bool()}; NetType net_type{NetType::ipv4}; if (is_inbound) { if (IsAddrIPv6(addr)) { net_type = NetType::ipv6; ++ipv6_i; } else if (IsInboundOnion(addr_local, mapped_as)) { net_type = NetType::onion; ++onion_i; } else { ++ipv4_i; } if (is_block_relay) ++block_relay_i; } else { if (IsAddrIPv6(addr)) { net_type = NetType::ipv6; ++ipv6_o; } else if (IsOutboundOnion(addr, mapped_as)) { net_type = NetType::onion; ++onion_o; } else { ++ipv4_o; } if (is_block_relay) ++block_relay_o; } if (DetailsRequested()) { // Push data for this peer to the peers vector. const int peer_id{peer["id"].get_int()}; const int version{peer["version"].get_int()}; const std::string sub_version{peer["subver"].get_str()}; const int64_t conn_time{peer["conntime"].get_int64()}; const int64_t last_blck{peer["last_block"].get_int64()}; const int64_t last_recv{peer["lastrecv"].get_int64()}; const int64_t last_send{peer["lastsend"].get_int64()}; const int64_t last_trxn{peer["last_transaction"].get_int64()}; const double min_ping{peer["minping"].isNull() ? -1 : peer["minping"].get_real()}; const double ping{peer["pingtime"].isNull() ? -1 : peer["pingtime"].get_real()}; peers.push_back({peer_id, mapped_as, version, conn_time, last_blck, last_recv, last_send, last_trxn, min_ping, ping, addr, sub_version, net_type, is_block_relay, !is_inbound}); max_peer_id_length = std::max(ToString(peer_id).length(), max_peer_id_length); max_addr_length = std::max(addr.length() + 1, max_addr_length); is_asmap_on |= (mapped_as != 0); } } // Generate report header. std::string result{strprintf("%s %s%s - %i%s\n\n", PACKAGE_NAME, FormatFullVersion(), ChainToString(), networkinfo["protocolversion"].get_int(), networkinfo["subversion"].get_str())}; // Report detailed peer connections list sorted by direction and minimum ping time. if (DetailsRequested() && !peers.empty()) { std::sort(peers.begin(), peers.end()); result += "Peer connections sorted by direction and min ping\n<-> relay net mping ping send recv txn blk uptime "; if (is_asmap_on) result += " asmap "; result += strprintf("%*s %-*s%s\n", max_peer_id_length, "id", IsAddressSelected() ? max_addr_length : 0, IsAddressSelected() ? "address" : "", IsVersionSelected() ? "version" : ""); for (const Peer& peer : peers) { std::string version{ToString(peer.version) + peer.sub_version}; result += strprintf( "%3s %5s %5s%6s%7s%5s%5s%5s%5s%7s%*i %*s %-*s%s\n", peer.is_outbound ? "out" : "in", peer.is_block_relay ? "block" : "full", NetTypeEnumToString(peer.net_type), peer.min_ping == -1 ? "" : ToString(round(1000 * peer.min_ping)), peer.ping == -1 ? "" : ToString(round(1000 * peer.ping)), peer.last_send == 0 ? "" : ToString(time_now - peer.last_send), peer.last_recv == 0 ? "" : ToString(time_now - peer.last_recv), peer.last_trxn == 0 ? "" : ToString((time_now - peer.last_trxn) / 60), peer.last_blck == 0 ? "" : ToString((time_now - peer.last_blck) / 60), peer.conn_time == 0 ? "" : ToString((time_now - peer.conn_time) / 60), is_asmap_on ? 7 : 0, // variable spacing is_asmap_on && peer.mapped_as != 0 ? ToString(peer.mapped_as) : "", max_peer_id_length, // variable spacing peer.id, IsAddressSelected() ? max_addr_length : 0, // variable spacing IsAddressSelected() ? peer.addr : "", IsVersionSelected() && version != "0" ? version : ""); } result += " ms ms sec sec min min min\n\n"; } // Report peer connection totals by type. total_i = ipv4_i + ipv6_i + onion_i; total_o = ipv4_o + ipv6_o + onion_o; result += " ipv4 ipv6 onion total block-relay\n"; result += strprintf("in %5i %5i %5i %5i %5i\n", ipv4_i, ipv6_i, onion_i, total_i, block_relay_i); result += strprintf("out %5i %5i %5i %5i %5i\n", ipv4_o, ipv6_o, onion_o, total_o, block_relay_o); result += strprintf("total %5i %5i %5i %5i %5i\n", ipv4_i + ipv4_o, ipv6_i + ipv6_o, onion_i + onion_o, total_i + total_o, block_relay_i + block_relay_o); // Report local addresses, ports, and scores. result += "\nLocal addresses"; const UniValue& local_addrs{networkinfo["localaddresses"]}; if (local_addrs.empty()) { result += ": n/a\n"; } else { for (const UniValue& addr : local_addrs.getValues()) { result += strprintf("\n%-40i port %5i score %6i", addr["address"].get_str(), addr["port"].get_int(), addr["score"].get_int()); } } return JSONRPCReplyObj(UniValue{result}, NullUniValue, 1); } }; /** Process RPC generatetoaddress request. */ class GenerateToAddressRequestHandler : public BaseRequestHandler { public: UniValue PrepareRequest(const std::string& method, const std::vector& args) override { address_str = args.at(1); UniValue params{RPCConvertValues("generatetoaddress", args)}; return JSONRPCRequestObj("generatetoaddress", params, 1); } UniValue ProcessReply(const UniValue &reply) override { UniValue result(UniValue::VOBJ); result.pushKV("address", address_str); result.pushKV("blocks", reply.get_obj()["result"]); return JSONRPCReplyObj(result, NullUniValue, 1); } protected: std::string address_str; }; /** Process default single requests */ class DefaultRequestHandler: public BaseRequestHandler { public: UniValue PrepareRequest(const std::string& method, const std::vector& args) override { UniValue params; if(gArgs.GetBoolArg("-named", DEFAULT_NAMED)) { params = RPCConvertNamedValues(method, args); } else { params = RPCConvertValues(method, args); } return JSONRPCRequestObj(method, params, 1); } UniValue ProcessReply(const UniValue &reply) override { return reply.get_obj(); } }; static UniValue CallRPC(BaseRequestHandler* rh, const std::string& strMethod, const std::vector& args, const Optional& rpcwallet = {}) { std::string host; // In preference order, we choose the following for the port: // 1. -rpcport // 2. port in -rpcconnect (ie following : in ipv4 or ]: in ipv6) // 3. default port for chain int port = BaseParams().RPCPort(); SplitHostPort(gArgs.GetArg("-rpcconnect", DEFAULT_RPCCONNECT), port, host); port = gArgs.GetArg("-rpcport", port); // Obtain event base raii_event_base base = obtain_event_base(); // Synchronously look up hostname raii_evhttp_connection evcon = obtain_evhttp_connection_base(base.get(), host, port); // Set connection timeout { const int timeout = gArgs.GetArg("-rpcclienttimeout", DEFAULT_HTTP_CLIENT_TIMEOUT); if (timeout > 0) { evhttp_connection_set_timeout(evcon.get(), timeout); } else { // Indefinite request timeouts are not possible in libevent-http, so we // set the timeout to a very long time period instead. constexpr int YEAR_IN_SECONDS = 31556952; // Average length of year in Gregorian calendar evhttp_connection_set_timeout(evcon.get(), 5 * YEAR_IN_SECONDS); } } HTTPReply response; raii_evhttp_request req = obtain_evhttp_request(http_request_done, (void*)&response); if (req == nullptr) throw std::runtime_error("create http request failed"); #if LIBEVENT_VERSION_NUMBER >= 0x02010300 evhttp_request_set_error_cb(req.get(), http_error_cb); #endif // Get credentials std::string strRPCUserColonPass; bool failedToGetAuthCookie = false; if (gArgs.GetArg("-rpcpassword", "") == "") { // Try fall back to cookie-based authentication if no password is provided if (!GetAuthCookie(&strRPCUserColonPass)) { failedToGetAuthCookie = true; } } else { strRPCUserColonPass = gArgs.GetArg("-rpcuser", "") + ":" + gArgs.GetArg("-rpcpassword", ""); } struct evkeyvalq* output_headers = evhttp_request_get_output_headers(req.get()); assert(output_headers); evhttp_add_header(output_headers, "Host", host.c_str()); evhttp_add_header(output_headers, "Connection", "close"); evhttp_add_header(output_headers, "Content-Type", "application/json"); evhttp_add_header(output_headers, "Authorization", (std::string("Basic ") + EncodeBase64(strRPCUserColonPass)).c_str()); // Attach request data std::string strRequest = rh->PrepareRequest(strMethod, args).write() + "\n"; struct evbuffer* output_buffer = evhttp_request_get_output_buffer(req.get()); assert(output_buffer); evbuffer_add(output_buffer, strRequest.data(), strRequest.size()); // check if we should use a special wallet endpoint std::string endpoint = "/"; if (rpcwallet) { char* encodedURI = evhttp_uriencode(rpcwallet->data(), rpcwallet->size(), false); if (encodedURI) { endpoint = "/wallet/" + std::string(encodedURI); free(encodedURI); } else { throw CConnectionFailed("uri-encode failed"); } } int r = evhttp_make_request(evcon.get(), req.get(), EVHTTP_REQ_POST, endpoint.c_str()); req.release(); // ownership moved to evcon in above call if (r != 0) { throw CConnectionFailed("send http request failed"); } event_base_dispatch(base.get()); if (response.status == 0) { std::string responseErrorMessage; if (response.error != -1) { responseErrorMessage = strprintf(" (error code %d - \"%s\")", response.error, http_errorstring(response.error)); } throw CConnectionFailed(strprintf("Could not connect to the server %s:%d%s\n\nMake sure the bitcoind server is running and that you are connecting to the correct RPC port.", host, port, responseErrorMessage)); } else if (response.status == HTTP_UNAUTHORIZED) { if (failedToGetAuthCookie) { throw std::runtime_error(strprintf( "Could not locate RPC credentials. No authentication cookie could be found, and RPC password is not set. See -rpcpassword and -stdinrpcpass. Configuration file: (%s)", GetConfigFile(gArgs.GetArg("-conf", BITCOIN_CONF_FILENAME)).string())); } else { throw std::runtime_error("Authorization failed: Incorrect rpcuser or rpcpassword"); } } else if (response.status >= 400 && response.status != HTTP_BAD_REQUEST && response.status != HTTP_NOT_FOUND && response.status != HTTP_INTERNAL_SERVER_ERROR) throw std::runtime_error(strprintf("server returned HTTP error %d", response.status)); else if (response.body.empty()) throw std::runtime_error("no response from server"); // Parse reply UniValue valReply(UniValue::VSTR); if (!valReply.read(response.body)) throw std::runtime_error("couldn't parse reply from server"); const UniValue reply = rh->ProcessReply(valReply); if (reply.empty()) throw std::runtime_error("expected reply to have result, error and id properties"); return reply; } /** * ConnectAndCallRPC wraps CallRPC with -rpcwait and an exception handler. * * @param[in] rh Pointer to RequestHandler. * @param[in] strMethod Reference to const string method to forward to CallRPC. * @param[in] rpcwallet Reference to const optional string wallet name to forward to CallRPC. * @returns the RPC response as a UniValue object. * @throws a CConnectionFailed std::runtime_error if connection failed or RPC server still in warmup. */ static UniValue ConnectAndCallRPC(BaseRequestHandler* rh, const std::string& strMethod, const std::vector& args, const Optional& rpcwallet = {}) { UniValue response(UniValue::VOBJ); // Execute and handle connection failures with -rpcwait. const bool fWait = gArgs.GetBoolArg("-rpcwait", false); do { try { response = CallRPC(rh, strMethod, args, rpcwallet); if (fWait) { const UniValue& error = find_value(response, "error"); if (!error.isNull() && error["code"].get_int() == RPC_IN_WARMUP) { throw CConnectionFailed("server in warmup"); } } break; // Connection succeeded, no need to retry. } catch (const CConnectionFailed&) { if (fWait) { UninterruptibleSleep(std::chrono::milliseconds{1000}); } else { throw; } } } while (fWait); return response; } /** Parse UniValue result to update the message to print to std::cout. */ static void ParseResult(const UniValue& result, std::string& strPrint) { if (result.isNull()) return; strPrint = result.isStr() ? result.get_str() : result.write(2); } /** Parse UniValue error to update the message to print to std::cerr and the code to return. */ static void ParseError(const UniValue& error, std::string& strPrint, int& nRet) { if (error.isObject()) { const UniValue& err_code = find_value(error, "code"); const UniValue& err_msg = find_value(error, "message"); if (!err_code.isNull()) { strPrint = "error code: " + err_code.getValStr() + "\n"; } if (err_msg.isStr()) { strPrint += ("error message:\n" + err_msg.get_str()); } if (err_code.isNum() && err_code.get_int() == RPC_WALLET_NOT_SPECIFIED) { strPrint += "\nTry adding \"-rpcwallet=\" option to bitcoin-cli command line."; } } else { strPrint = "error: " + error.write(); } nRet = abs(error["code"].get_int()); } /** * GetWalletBalances calls listwallets; if more than one wallet is loaded, it then * fetches mine.trusted balances for each loaded wallet and pushes them to `result`. * * @param result Reference to UniValue object the wallet names and balances are pushed to. */ static void GetWalletBalances(UniValue& result) { DefaultRequestHandler rh; const UniValue listwallets = ConnectAndCallRPC(&rh, "listwallets", /* args=*/{}); if (!find_value(listwallets, "error").isNull()) return; const UniValue& wallets = find_value(listwallets, "result"); if (wallets.size() <= 1) return; UniValue balances(UniValue::VOBJ); for (const UniValue& wallet : wallets.getValues()) { const std::string wallet_name = wallet.get_str(); const UniValue getbalances = ConnectAndCallRPC(&rh, "getbalances", /* args=*/{}, wallet_name); const UniValue& balance = find_value(getbalances, "result")["mine"]["trusted"]; balances.pushKV(wallet_name, balance); } result.pushKV("balances", balances); } /** * Call RPC getnewaddress. * @returns getnewaddress response as a UniValue object. */ static UniValue GetNewAddress() { Optional wallet_name{}; if (gArgs.IsArgSet("-rpcwallet")) wallet_name = gArgs.GetArg("-rpcwallet", ""); DefaultRequestHandler rh; return ConnectAndCallRPC(&rh, "getnewaddress", /* args=*/{}, wallet_name); } /** * Check bounds and set up args for RPC generatetoaddress params: nblocks, address, maxtries. * @param[in] address Reference to const string address to insert into the args. * @param args Reference to vector of string args to modify. */ static void SetGenerateToAddressArgs(const std::string& address, std::vector& args) { if (args.size() > 2) throw std::runtime_error("too many arguments (maximum 2 for nblocks and maxtries)"); if (args.size() == 0) { args.emplace_back(DEFAULT_NBLOCKS); } else if (args.at(0) == "0") { throw std::runtime_error("the first argument (number of blocks to generate, default: " + DEFAULT_NBLOCKS + ") must be an integer value greater than zero"); } args.emplace(args.begin() + 1, address); } static int CommandLineRPC(int argc, char *argv[]) { std::string strPrint; int nRet = 0; try { // Skip switches while (argc > 1 && IsSwitchChar(argv[1][0])) { argc--; argv++; } std::string rpcPass; if (gArgs.GetBoolArg("-stdinrpcpass", false)) { NO_STDIN_ECHO(); if (!StdinReady()) { fputs("RPC password> ", stderr); fflush(stderr); } if (!std::getline(std::cin, rpcPass)) { throw std::runtime_error("-stdinrpcpass specified but failed to read from standard input"); } if (StdinTerminal()) { fputc('\n', stdout); } gArgs.ForceSetArg("-rpcpassword", rpcPass); } std::vector args = std::vector(&argv[1], &argv[argc]); if (gArgs.GetBoolArg("-stdinwalletpassphrase", false)) { NO_STDIN_ECHO(); std::string walletPass; if (args.size() < 1 || args[0].substr(0, 16) != "walletpassphrase") { throw std::runtime_error("-stdinwalletpassphrase is only applicable for walletpassphrase(change)"); } if (!StdinReady()) { fputs("Wallet passphrase> ", stderr); fflush(stderr); } if (!std::getline(std::cin, walletPass)) { throw std::runtime_error("-stdinwalletpassphrase specified but failed to read from standard input"); } if (StdinTerminal()) { fputc('\n', stdout); } args.insert(args.begin() + 1, walletPass); } if (gArgs.GetBoolArg("-stdin", false)) { // Read one arg per line from stdin and append std::string line; while (std::getline(std::cin, line)) { args.push_back(line); } if (StdinTerminal()) { fputc('\n', stdout); } } std::unique_ptr rh; std::string method; if (gArgs.IsArgSet("-getinfo")) { rh.reset(new GetinfoRequestHandler()); } else if (gArgs.GetBoolArg("-netinfo", false)) { rh.reset(new NetinfoRequestHandler()); } else if (gArgs.GetBoolArg("-generate", false)) { const UniValue getnewaddress{GetNewAddress()}; const UniValue& error{find_value(getnewaddress, "error")}; if (error.isNull()) { SetGenerateToAddressArgs(find_value(getnewaddress, "result").get_str(), args); rh.reset(new GenerateToAddressRequestHandler()); } else { ParseError(error, strPrint, nRet); } } else { rh.reset(new DefaultRequestHandler()); if (args.size() < 1) { throw std::runtime_error("too few parameters (need at least command)"); } method = args[0]; args.erase(args.begin()); // Remove trailing method name from arguments vector } if (nRet == 0) { // Perform RPC call Optional wallet_name{}; if (gArgs.IsArgSet("-rpcwallet")) wallet_name = gArgs.GetArg("-rpcwallet", ""); const UniValue reply = ConnectAndCallRPC(rh.get(), method, args, wallet_name); // Parse reply UniValue result = find_value(reply, "result"); const UniValue& error = find_value(reply, "error"); if (error.isNull()) { if (gArgs.IsArgSet("-getinfo") && !gArgs.IsArgSet("-rpcwallet")) { GetWalletBalances(result); // fetch multiwallet balances and append to result } ParseResult(result, strPrint); } else { ParseError(error, strPrint, nRet); } } } catch (const std::exception& e) { strPrint = std::string("error: ") + e.what(); nRet = EXIT_FAILURE; } catch (...) { PrintExceptionContinue(nullptr, "CommandLineRPC()"); throw; } if (strPrint != "") { tfm::format(nRet == 0 ? std::cout : std::cerr, "%s\n", strPrint); } return nRet; } #ifdef WIN32 // Export main() and ensure working ASLR on Windows. // Exporting a symbol will prevent the linker from stripping // the .reloc section from the binary, which is a requirement // for ASLR. This is a temporary workaround until a fixed // version of binutils is used for releases. __declspec(dllexport) int main(int argc, char* argv[]) { util::WinCmdLineArgs winArgs; std::tie(argc, argv) = winArgs.get(); #else int main(int argc, char* argv[]) { #endif SetupEnvironment(); if (!SetupNetworking()) { tfm::format(std::cerr, "Error: Initializing networking failed\n"); return EXIT_FAILURE; } event_set_log_callback(&libevent_log_cb); try { int ret = AppInitRPC(argc, argv); if (ret != CONTINUE_EXECUTION) return ret; } catch (const std::exception& e) { PrintExceptionContinue(&e, "AppInitRPC()"); return EXIT_FAILURE; } catch (...) { PrintExceptionContinue(nullptr, "AppInitRPC()"); return EXIT_FAILURE; } int ret = EXIT_FAILURE; try { ret = CommandLineRPC(argc, argv); } catch (const std::exception& e) { PrintExceptionContinue(&e, "CommandLineRPC()"); } catch (...) { PrintExceptionContinue(nullptr, "CommandLineRPC()"); } return ret; }