From deb3572ab160221124dfa3e9c5c4e493529f59e4 Mon Sep 17 00:00:00 2001 From: "Wladimir J. van der Laan" Date: Mon, 17 Feb 2014 17:35:40 +0100 Subject: [PATCH] Add -rpcbind option to allow binding RPC port on a specific interface Add -rpcbind command option to specify binding RPC service on one or multiple specific interfaces. Functionality if -rpcbind is not specified remains the same as before: - If no -rpcallowip specified, bind on localhost - If no -rpcbind specified, bind on any interface Implements part of #3111. --- src/init.cpp | 3 +- src/rpcserver.cpp | 95 ++++++++++++++++++++++++++++++----------------- 2 files changed, 62 insertions(+), 36 deletions(-) diff --git a/src/init.cpp b/src/init.cpp index 700770785..766498876 100644 --- a/src/init.cpp +++ b/src/init.cpp @@ -304,10 +304,11 @@ std::string HelpMessage(HelpMessageMode hmm) strUsage += "\n" + _("RPC server options:") + "\n"; strUsage += " -server " + _("Accept command line and JSON-RPC commands") + "\n"; + strUsage += " -rpcbind= " + _("Bind to given address to listen for JSON-RPC connections. Use [host]:port notation for IPv6. This option can be specified multiple times (default: bind to all interfaces)") + "\n"; strUsage += " -rpcuser= " + _("Username for JSON-RPC connections") + "\n"; strUsage += " -rpcpassword= " + _("Password for JSON-RPC connections") + "\n"; strUsage += " -rpcport= " + _("Listen for JSON-RPC connections on (default: 8332 or testnet: 18332)") + "\n"; - strUsage += " -rpcallowip= " + _("Allow JSON-RPC connections from specified IP address") + "\n"; + strUsage += " -rpcallowip= " + _("Allow JSON-RPC connections from specified IP address. This option can be specified multiple times") + "\n"; strUsage += " -rpcthreads= " + _("Set the number of threads to service RPC calls (default: 4)") + "\n"; strUsage += "\n" + _("RPC SSL options: (see the Bitcoin Wiki for SSL setup instructions)") + "\n"; diff --git a/src/rpcserver.cpp b/src/rpcserver.cpp index d4a229b09..2534a9dcf 100644 --- a/src/rpcserver.cpp +++ b/src/rpcserver.cpp @@ -508,6 +508,14 @@ static void RPCAcceptHandler(boost::shared_ptr< basic_socket_acceptorimpl(), strCiphers.c_str()); } - // Try a dual IPv6/IPv4 socket, falling back to separate IPv4 and IPv6 sockets - const bool loopback = !mapArgs.count("-rpcallowip"); - asio::ip::address bindAddress = loopback ? asio::ip::address_v6::loopback() : asio::ip::address_v6::any(); - ip::tcp::endpoint endpoint(bindAddress, GetArg("-rpcport", Params().RPCPort())); - boost::system::error_code v6_only_error; + std::vector vEndpoints; + bool bBindAny = false; + int defaultPort = GetArg("-rpcport", Params().RPCPort()); + if (!mapArgs.count("-rpcallowip")) // Default to loopback if not allowing external IPs + { + vEndpoints.push_back(ip::tcp::endpoint(asio::ip::address_v6::loopback(), defaultPort)); + vEndpoints.push_back(ip::tcp::endpoint(asio::ip::address_v4::loopback(), defaultPort)); + if (mapArgs.count("-rpcbind")) + { + LogPrintf("WARNING: option -rpcbind was ignored because -rpcallowip was not specified, refusing to allow everyone to connect\n"); + } + } else if (mapArgs.count("-rpcbind")) // Specific bind address + { + BOOST_FOREACH(const std::string &addr, mapMultiArgs["-rpcbind"]) + { + try { + vEndpoints.push_back(ParseEndpoint(addr, defaultPort)); + } + catch(boost::system::system_error &e) + { + uiInterface.ThreadSafeMessageBox( + strprintf(_("Could not parse -rpcbind value %s as network address"), addr), + "", CClientUIInterface::MSG_ERROR); + StartShutdown(); + return; + } + } + } else { // No specific bind address specified, bind to any + vEndpoints.push_back(ip::tcp::endpoint(asio::ip::address_v6::any(), defaultPort)); + vEndpoints.push_back(ip::tcp::endpoint(asio::ip::address_v4::any(), defaultPort)); + // Prefer making the socket dual IPv6/IPv4 instead of binding + // to both addresses seperately. + bBindAny = true; + } bool fListening = false; std::string strerr; - try + BOOST_FOREACH(const ip::tcp::endpoint &endpoint, vEndpoints) { + asio::ip::address bindAddress = endpoint.address(); + LogPrintf("Binding RPC on address %s port %i (IPv4+IPv6 bind any: %i)\n", bindAddress.to_string(), endpoint.port(), bBindAny); + boost::system::error_code v6_only_error; boost::shared_ptr acceptor(new ip::tcp::acceptor(*rpc_io_service)); rpc_acceptors.push_back(acceptor); - acceptor->open(endpoint.protocol()); - acceptor->set_option(boost::asio::ip::tcp::acceptor::reuse_address(true)); - - // Try making the socket dual IPv6/IPv4 (if listening on the "any" address) - acceptor->set_option(boost::asio::ip::v6_only(loopback), v6_only_error); - - acceptor->bind(endpoint); - acceptor->listen(socket_base::max_connections); - - RPCListen(acceptor, *rpc_ssl_context, fUseSSL); - - fListening = true; - } - catch(boost::system::system_error &e) - { - strerr = strprintf(_("An error occurred while setting up the RPC port %u for listening on IPv6, falling back to IPv4: %s"), endpoint.port(), e.what()); - } - try { - // If dual IPv6/IPv4 failed (or we're opening loopback interfaces only), open IPv4 separately - if (!fListening || loopback || v6_only_error) - { - bindAddress = loopback ? asio::ip::address_v4::loopback() : asio::ip::address_v4::any(); - endpoint.address(bindAddress); - boost::shared_ptr acceptor(new ip::tcp::acceptor(*rpc_io_service)); - rpc_acceptors.push_back(acceptor); + try { acceptor->open(endpoint.protocol()); acceptor->set_option(boost::asio::ip::tcp::acceptor::reuse_address(true)); + + // Try making the socket dual IPv6/IPv4 when listening on the IPv6 "any" address + acceptor->set_option(boost::asio::ip::v6_only( + !bBindAny || bindAddress != asio::ip::address_v6::any()), v6_only_error); + acceptor->bind(endpoint); acceptor->listen(socket_base::max_connections); RPCListen(acceptor, *rpc_ssl_context, fUseSSL); fListening = true; + // If dual IPv6/IPv4 bind succesful, skip binding to IPv4 separately + if(bBindAny && bindAddress == asio::ip::address_v6::any() && !v6_only_error) + break; + } + catch(boost::system::system_error &e) + { + LogPrintf("ERROR: Binding RPC on address %s port %i failed: %s\n", bindAddress.to_string(), endpoint.port(), e.what()); + strerr = strprintf(_("An error occurred while setting up the RPC address %s port %u for listening: %s"), bindAddress.to_string(), endpoint.port(), e.what()); } - } - catch(boost::system::system_error &e) - { - strerr = strprintf(_("An error occurred while setting up the RPC port %u for listening on IPv4: %s"), endpoint.port(), e.what()); } if (!fListening) {