diff options
Diffstat (limited to 'src/torcontrol.cpp')
| -rw-r--r-- | src/torcontrol.cpp | 167 |
1 files changed, 1 insertions, 166 deletions
diff --git a/src/torcontrol.cpp b/src/torcontrol.cpp index 605c77fc3a..6666e49a2b 100644 --- a/src/torcontrol.cpp +++ b/src/torcontrol.cpp @@ -12,6 +12,7 @@ #include <net.h> #include <netaddress.h> #include <netbase.h> +#include <util/readwritefile.h> #include <util/strencodings.h> #include <util/system.h> #include <util/time.h> @@ -55,77 +56,6 @@ static const int MAX_LINE_LENGTH = 100000; /****** Low-level TorControlConnection ********/ -/** Reply from Tor, can be single or multi-line */ -class TorControlReply -{ -public: - TorControlReply() { Clear(); } - - int code; - std::vector<std::string> lines; - - void Clear() - { - code = 0; - lines.clear(); - } -}; - -/** Low-level handling for Tor control connection. - * Speaks the SMTP-like protocol as defined in torspec/control-spec.txt - */ -class TorControlConnection -{ -public: - typedef std::function<void(TorControlConnection&)> ConnectionCB; - typedef std::function<void(TorControlConnection &,const TorControlReply &)> ReplyHandlerCB; - - /** Create a new TorControlConnection. - */ - explicit TorControlConnection(struct event_base *base); - ~TorControlConnection(); - - /** - * Connect to a Tor control port. - * tor_control_center is address of the form host:port. - * connected is the handler that is called when connection is successfully established. - * disconnected is a handler that is called when the connection is broken. - * Return true on success. - */ - bool Connect(const std::string& tor_control_center, const ConnectionCB& connected, const ConnectionCB& disconnected); - - /** - * Disconnect from Tor control port. - */ - void Disconnect(); - - /** Send a command, register a handler for the reply. - * A trailing CRLF is automatically added. - * Return true on success. - */ - bool Command(const std::string &cmd, const ReplyHandlerCB& reply_handler); - - /** Response handlers for async replies */ - boost::signals2::signal<void(TorControlConnection &,const TorControlReply &)> async_handler; -private: - /** Callback when ready for use */ - std::function<void(TorControlConnection&)> connected; - /** Callback when connection lost */ - std::function<void(TorControlConnection&)> disconnected; - /** Libevent event base */ - struct event_base *base; - /** Connection to control socket */ - struct bufferevent *b_conn; - /** Message being received */ - TorControlReply message; - /** Response handlers */ - std::deque<ReplyHandlerCB> reply_handlers; - - /** Libevent handlers: internal */ - static void readcb(struct bufferevent *bev, void *ctx); - static void eventcb(struct bufferevent *bev, short what, void *ctx); -}; - TorControlConnection::TorControlConnection(struct event_base *_base): base(_base), b_conn(nullptr) { @@ -362,101 +292,6 @@ std::map<std::string,std::string> ParseTorReplyMapping(const std::string &s) return mapping; } -/** Read full contents of a file and return them in a std::string. - * Returns a pair <status, string>. - * If an error occurred, status will be false, otherwise status will be true and the data will be returned in string. - * - * @param maxsize Puts a maximum size limit on the file that is read. If the file is larger than this, truncated data - * (with len > maxsize) will be returned. - */ -static std::pair<bool,std::string> ReadBinaryFile(const fs::path &filename, size_t maxsize=std::numeric_limits<size_t>::max()) -{ - FILE *f = fsbridge::fopen(filename, "rb"); - if (f == nullptr) - return std::make_pair(false,""); - std::string retval; - char buffer[128]; - size_t n; - while ((n=fread(buffer, 1, sizeof(buffer), f)) > 0) { - // Check for reading errors so we don't return any data if we couldn't - // read the entire file (or up to maxsize) - if (ferror(f)) { - fclose(f); - return std::make_pair(false,""); - } - retval.append(buffer, buffer+n); - if (retval.size() > maxsize) - break; - } - fclose(f); - return std::make_pair(true,retval); -} - -/** Write contents of std::string to a file. - * @return true on success. - */ -static bool WriteBinaryFile(const fs::path &filename, const std::string &data) -{ - FILE *f = fsbridge::fopen(filename, "wb"); - if (f == nullptr) - return false; - if (fwrite(data.data(), 1, data.size(), f) != data.size()) { - fclose(f); - return false; - } - fclose(f); - return true; -} - -/****** Bitcoin specific TorController implementation ********/ - -/** Controller that connects to Tor control socket, authenticate, then create - * and maintain an ephemeral onion service. - */ -class TorController -{ -public: - TorController(struct event_base* base, const std::string& tor_control_center, const CService& target); - ~TorController(); - - /** Get name of file to store private key in */ - fs::path GetPrivateKeyFile(); - - /** Reconnect, after getting disconnected */ - void Reconnect(); -private: - struct event_base* base; - const std::string m_tor_control_center; - TorControlConnection conn; - std::string private_key; - std::string service_id; - bool reconnect; - struct event *reconnect_ev; - float reconnect_timeout; - CService service; - const CService m_target; - /** Cookie for SAFECOOKIE auth */ - std::vector<uint8_t> cookie; - /** ClientNonce for SAFECOOKIE auth */ - std::vector<uint8_t> clientNonce; - - /** Callback for ADD_ONION result */ - void add_onion_cb(TorControlConnection& conn, const TorControlReply& reply); - /** Callback for AUTHENTICATE result */ - void auth_cb(TorControlConnection& conn, const TorControlReply& reply); - /** Callback for AUTHCHALLENGE result */ - void authchallenge_cb(TorControlConnection& conn, const TorControlReply& reply); - /** Callback for PROTOCOLINFO result */ - void protocolinfo_cb(TorControlConnection& conn, const TorControlReply& reply); - /** Callback after successful connection */ - void connected_cb(TorControlConnection& conn); - /** Callback after connection lost or failed connection attempt */ - void disconnected_cb(TorControlConnection& conn); - - /** Callback for reconnect timer */ - static void reconnect_cb(evutil_socket_t fd, short what, void *arg); -}; - TorController::TorController(struct event_base* _base, const std::string& tor_control_center, const CService& target): base(_base), m_tor_control_center(tor_control_center), conn(base), reconnect(true), reconnect_ev(0), |