maxmustermann/dogecoin
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity
dogecoin/src/torcontrol.cpp
Wladimir J. van der Laan 7d3b627395 torcontrol: Explicitly request RSA1024 private key 
When generating a new service key, explicitly request a RSA1024 one.

The bitcoin P2P protocol has no support for the longer hidden service names
that will come with ed25519 keys, until it does, we depend on the old
hidden service type so make this explicit.

See #9214.
2016-11-28 17:18:46 +01:00

709 lines
27 KiB
C++
Raw Blame History

// Copyright (c) 2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "torcontrol.h"
#include "utilstrencodings.h"
#include "netbase.h"
#include "net.h"
#include "util.h"
#include "crypto/hmac_sha256.h"
#include <vector>
#include <deque>
#include <set>
#include <stdlib.h>
#include <boost/function.hpp>
#include <boost/bind.hpp>
#include <boost/signals2/signal.hpp>
#include <boost/foreach.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/replace.hpp>
#include <event2/bufferevent.h>
#include <event2/buffer.h>
#include <event2/util.h>
#include <event2/event.h>
#include <event2/thread.h>
/** Default control port */
const std::string DEFAULT_TOR_CONTROL = "127.0.0.1:9051";
/** Tor cookie size (from control-spec.txt) */
static const int TOR_COOKIE_SIZE = 32;
/** Size of client/server nonce for SAFECOOKIE */
static const int TOR_NONCE_SIZE = 32;
/** For computing serverHash in SAFECOOKIE */
static const std::string TOR_SAFE_SERVERKEY = "Tor safe cookie authentication server-to-controller hash";
/** For computing clientHash in SAFECOOKIE */
static const std::string TOR_SAFE_CLIENTKEY = "Tor safe cookie authentication controller-to-server hash";
/** Exponential backoff configuration - initial timeout in seconds */
static const float RECONNECT_TIMEOUT_START = 1.0;
/** Exponential backoff configuration - growth factor */
static const float RECONNECT_TIMEOUT_EXP = 1.5;
/** Maximum length for lines received on TorControlConnection.
* tor-control-spec.txt mentions that there is explicitly no limit defined to line length,
* this is belt-and-suspenders sanity limit to prevent memory exhaustion.
*/
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 boost::function<void(TorControlConnection&)> ConnectionCB;
typedef boost::function<void(TorControlConnection &,const TorControlReply &)> ReplyHandlerCB;
/** Create a new TorControlConnection.
*/
TorControlConnection(struct event_base *base);
~TorControlConnection();
/**
* Connect to a Tor control port.
* target 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 &target, const ConnectionCB& connected, const ConnectionCB& disconnected);
/**
* Disconnect from Tor control port.
*/
bool 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 */
boost::function<void(TorControlConnection&)> connected;
/** Callback when connection lost */
boost::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(0)
{
}
TorControlConnection::~TorControlConnection()
{
if (b_conn)
bufferevent_free(b_conn);
}
void TorControlConnection::readcb(struct bufferevent *bev, void *ctx)
{
TorControlConnection *self = (TorControlConnection*)ctx;
struct evbuffer *input = bufferevent_get_input(bev);
size_t n_read_out = 0;
char *line;
assert(input);
// If there is not a whole line to read, evbuffer_readln returns NULL
while((line = evbuffer_readln(input, &n_read_out, EVBUFFER_EOL_CRLF)) != NULL)
{
std::string s(line, n_read_out);
free(line);
if (s.size() < 4) // Short line
continue;
// <status>(-|+| )<data><CRLF>
self->message.code = atoi(s.substr(0,3));
self->message.lines.push_back(s.substr(4));
char ch = s[3]; // '-','+' or ' '
if (ch == ' ') {
// Final line, dispatch reply and clean up
if (self->message.code >= 600) {
// Dispatch async notifications to async handler
// Synchronous and asynchronous messages are never interleaved
self->async_handler(*self, self->message);
} else {
if (!self->reply_handlers.empty()) {
// Invoke reply handler with message
self->reply_handlers.front()(*self, self->message);
self->reply_handlers.pop_front();
} else {
LogPrint("tor", "tor: Received unexpected sync reply %i\n", self->message.code);
}
}
self->message.Clear();
}
}
// Check for size of buffer - protect against memory exhaustion with very long lines
// Do this after evbuffer_readln to make sure all full lines have been
// removed from the buffer. Everything left is an incomplete line.
if (evbuffer_get_length(input) > MAX_LINE_LENGTH) {
LogPrintf("tor: Disconnecting because MAX_LINE_LENGTH exceeded\n");
self->Disconnect();
}
}
void TorControlConnection::eventcb(struct bufferevent *bev, short what, void *ctx)
{
TorControlConnection *self = (TorControlConnection*)ctx;
if (what & BEV_EVENT_CONNECTED) {
LogPrint("tor", "tor: Successfully connected!\n");
self->connected(*self);
} else if (what & (BEV_EVENT_EOF|BEV_EVENT_ERROR)) {
if (what & BEV_EVENT_ERROR)
LogPrint("tor", "tor: Error connecting to Tor control socket\n");
else
LogPrint("tor", "tor: End of stream\n");
self->Disconnect();
self->disconnected(*self);
}
}
bool TorControlConnection::Connect(const std::string &target, const ConnectionCB& _connected, const ConnectionCB& _disconnected)
{
if (b_conn)
Disconnect();
// Parse target address:port
struct sockaddr_storage connect_to_addr;
int connect_to_addrlen = sizeof(connect_to_addr);
if (evutil_parse_sockaddr_port(target.c_str(),
(struct sockaddr*)&connect_to_addr, &connect_to_addrlen)<0) {
LogPrintf("tor: Error parsing socket address %s\n", target);
return false;
}
// Create a new socket, set up callbacks and enable notification bits
b_conn = bufferevent_socket_new(base, -1, BEV_OPT_CLOSE_ON_FREE);
if (!b_conn)
return false;
bufferevent_setcb(b_conn, TorControlConnection::readcb, NULL, TorControlConnection::eventcb, this);
bufferevent_enable(b_conn, EV_READ|EV_WRITE);
this->connected = _connected;
this->disconnected = _disconnected;
// Finally, connect to target
if (bufferevent_socket_connect(b_conn, (struct sockaddr*)&connect_to_addr, connect_to_addrlen) < 0) {
LogPrintf("tor: Error connecting to address %s\n", target);
return false;
}
return true;
}
bool TorControlConnection::Disconnect()
{
if (b_conn)
bufferevent_free(b_conn);
b_conn = 0;
return true;
}
bool TorControlConnection::Command(const std::string &cmd, const ReplyHandlerCB& reply_handler)
{
if (!b_conn)
return false;
struct evbuffer *buf = bufferevent_get_output(b_conn);
if (!buf)
return false;
evbuffer_add(buf, cmd.data(), cmd.size());
evbuffer_add(buf, "\r\n", 2);
reply_handlers.push_back(reply_handler);
return true;
}
/****** General parsing utilities ********/
/* Split reply line in the form 'AUTH METHODS=...' into a type
* 'AUTH' and arguments 'METHODS=...'.
*/
static std::pair<std::string,std::string> SplitTorReplyLine(const std::string &s)
{
size_t ptr=0;
std::string type;
while (ptr < s.size() && s[ptr] != ' ') {
type.push_back(s[ptr]);
++ptr;
}
if (ptr < s.size())
++ptr; // skip ' '
return make_pair(type, s.substr(ptr));
}
/** Parse reply arguments in the form 'METHODS=COOKIE,SAFECOOKIE COOKIEFILE=".../control_auth_cookie"'.
*/
static std::map<std::string,std::string> ParseTorReplyMapping(const std::string &s)
{
std::map<std::string,std::string> mapping;
size_t ptr=0;
while (ptr < s.size()) {
std::string key, value;
while (ptr < s.size() && s[ptr] != '=') {
key.push_back(s[ptr]);
++ptr;
}
if (ptr == s.size()) // unexpected end of line
return std::map<std::string,std::string>();
++ptr; // skip '='
if (ptr < s.size() && s[ptr] == '"') { // Quoted string
++ptr; // skip '='
bool escape_next = false;
while (ptr < s.size() && (!escape_next && s[ptr] != '"')) {
escape_next = (s[ptr] == '\\');
value.push_back(s[ptr]);
++ptr;
}
if (ptr == s.size()) // unexpected end of line
return std::map<std::string,std::string>();
++ptr; // skip closing '"'
/* TODO: unescape value - according to the spec this depends on the
* context, some strings use C-LogPrintf style escape codes, some
* don't. So may be better handled at the call site.
*/
} else { // Unquoted value. Note that values can contain '=' at will, just no spaces
while (ptr < s.size() && s[ptr] != ' ') {
value.push_back(s[ptr]);
++ptr;
}
}
if (ptr < s.size() && s[ptr] == ' ')
++ptr; // skip ' ' after key=value
mapping[key] = value;
}
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 std::string &filename, size_t maxsize=std::numeric_limits<size_t>::max())
{
FILE *f = fopen(filename.c_str(), "rb");
if (f == NULL)
return std::make_pair(false,"");
std::string retval;
char buffer[128];
size_t n;
while ((n=fread(buffer, 1, sizeof(buffer), f)) > 0) {
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 std::string &filename, const std::string &data)
{
FILE *f = fopen(filename.c_str(), "wb");
if (f == NULL)
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 a ephemeral hidden service.
*/
class TorController
{
public:
TorController(struct event_base* base, const std::string& target);
~TorController();
/** Get name fo file to store private key in */
std::string GetPrivateKeyFile();
/** Reconnect, after getting disconnected */
void Reconnect();
private:
struct event_base* base;
std::string target;
TorControlConnection conn;
std::string private_key;
std::string service_id;
bool reconnect;
struct event *reconnect_ev;
float reconnect_timeout;
CService service;
/** Cooie 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& _target):
base(_base),
target(_target), conn(base), reconnect(true), reconnect_ev(0),
reconnect_timeout(RECONNECT_TIMEOUT_START)
{
reconnect_ev = event_new(base, -1, 0, reconnect_cb, this);
if (!reconnect_ev)
LogPrintf("tor: Failed to create event for reconnection: out of memory?\n");
// Start connection attempts immediately
if (!conn.Connect(_target, boost::bind(&TorController::connected_cb, this, _1),
boost::bind(&TorController::disconnected_cb, this, _1) )) {
LogPrintf("tor: Initiating connection to Tor control port %s failed\n", _target);
}
// Read service private key if cached
std::pair<bool,std::string> pkf = ReadBinaryFile(GetPrivateKeyFile());
if (pkf.first) {
LogPrint("tor", "tor: Reading cached private key from %s\n", GetPrivateKeyFile());
private_key = pkf.second;
}
}
TorController::~TorController()
{
if (reconnect_ev) {
event_free(reconnect_ev);
reconnect_ev = 0;
}
if (service.IsValid()) {
RemoveLocal(service);
}
}
void TorController::add_onion_cb(TorControlConnection& _conn, const TorControlReply& reply)
{
if (reply.code == 250) {
LogPrint("tor", "tor: ADD_ONION successful\n");
BOOST_FOREACH(const std::string &s, reply.lines) {
std::map<std::string,std::string> m = ParseTorReplyMapping(s);
std::map<std::string,std::string>::iterator i;
if ((i = m.find("ServiceID")) != m.end())
service_id = i->second;
if ((i = m.find("PrivateKey")) != m.end())
private_key = i->second;
}
service = LookupNumeric(std::string(service_id+".onion").c_str(), GetListenPort());
LogPrintf("tor: Got service ID %s, advertising service %s\n", service_id, service.ToString());
if (WriteBinaryFile(GetPrivateKeyFile(), private_key)) {
LogPrint("tor", "tor: Cached service private key to %s\n", GetPrivateKeyFile());
} else {
LogPrintf("tor: Error writing service private key to %s\n", GetPrivateKeyFile());
}
AddLocal(service, LOCAL_MANUAL);
// ... onion requested - keep connection open
} else if (reply.code == 510) { // 510 Unrecognized command
LogPrintf("tor: Add onion failed with unrecognized command (You probably need to upgrade Tor)\n");
} else {
LogPrintf("tor: Add onion failed; error code %d\n", reply.code);
}
}
void TorController::auth_cb(TorControlConnection& _conn, const TorControlReply& reply)
{
if (reply.code == 250) {
LogPrint("tor", "tor: Authentication successful\n");
// Now that we know Tor is running setup the proxy for onion addresses
// if -onion isn't set to something else.
if (GetArg("-onion", "") == "") {
CService resolved(LookupNumeric("127.0.0.1", 9050));
proxyType addrOnion = proxyType(resolved, true);
SetProxy(NET_TOR, addrOnion);
SetLimited(NET_TOR, false);
}
// Finally - now create the service
if (private_key.empty()) // No private key, generate one
private_key = "NEW:RSA1024"; // Explicitly request RSA1024 - see issue #9214
// Request hidden service, redirect port.
// Note that the 'virtual' port doesn't have to be the same as our internal port, but this is just a convenient
// choice. TODO; refactor the shutdown sequence some day.
_conn.Command(strprintf("ADD_ONION %s Port=%i,127.0.0.1:%i", private_key, GetListenPort(), GetListenPort()),
boost::bind(&TorController::add_onion_cb, this, _1, _2));
} else {
LogPrintf("tor: Authentication failed\n");
}
}
/** Compute Tor SAFECOOKIE response.
*
* ServerHash is computed as:
* HMAC-SHA256("Tor safe cookie authentication server-to-controller hash",
* CookieString | ClientNonce | ServerNonce)
* (with the HMAC key as its first argument)
*
* After a controller sends a successful AUTHCHALLENGE command, the
* next command sent on the connection must be an AUTHENTICATE command,
* and the only authentication string which that AUTHENTICATE command
* will accept is:
*
* HMAC-SHA256("Tor safe cookie authentication controller-to-server hash",
* CookieString | ClientNonce | ServerNonce)
*
*/
static std::vector<uint8_t> ComputeResponse(const std::string &key, const std::vector<uint8_t> &cookie, const std::vector<uint8_t> &clientNonce, const std::vector<uint8_t> &serverNonce)
{
CHMAC_SHA256 computeHash((const uint8_t*)key.data(), key.size());
std::vector<uint8_t> computedHash(CHMAC_SHA256::OUTPUT_SIZE, 0);
computeHash.Write(begin_ptr(cookie), cookie.size());
computeHash.Write(begin_ptr(clientNonce), clientNonce.size());
computeHash.Write(begin_ptr(serverNonce), serverNonce.size());
computeHash.Finalize(begin_ptr(computedHash));
return computedHash;
}
void TorController::authchallenge_cb(TorControlConnection& _conn, const TorControlReply& reply)
{
if (reply.code == 250) {
LogPrint("tor", "tor: SAFECOOKIE authentication challenge successful\n");
std::pair<std::string,std::string> l = SplitTorReplyLine(reply.lines[0]);
if (l.first == "AUTHCHALLENGE") {
std::map<std::string,std::string> m = ParseTorReplyMapping(l.second);
std::vector<uint8_t> serverHash = ParseHex(m["SERVERHASH"]);
std::vector<uint8_t> serverNonce = ParseHex(m["SERVERNONCE"]);
LogPrint("tor", "tor: AUTHCHALLENGE ServerHash %s ServerNonce %s\n", HexStr(serverHash), HexStr(serverNonce));
if (serverNonce.size() != 32) {
LogPrintf("tor: ServerNonce is not 32 bytes, as required by spec\n");
return;
}
std::vector<uint8_t> computedServerHash = ComputeResponse(TOR_SAFE_SERVERKEY, cookie, clientNonce, serverNonce);
if (computedServerHash != serverHash) {
LogPrintf("tor: ServerHash %s does not match expected ServerHash %s\n", HexStr(serverHash), HexStr(computedServerHash));
return;
}
std::vector<uint8_t> computedClientHash = ComputeResponse(TOR_SAFE_CLIENTKEY, cookie, clientNonce, serverNonce);
_conn.Command("AUTHENTICATE " + HexStr(computedClientHash), boost::bind(&TorController::auth_cb, this, _1, _2));
} else {
LogPrintf("tor: Invalid reply to AUTHCHALLENGE\n");
}
} else {
LogPrintf("tor: SAFECOOKIE authentication challenge failed\n");
}
}
void TorController::protocolinfo_cb(TorControlConnection& _conn, const TorControlReply& reply)
{
if (reply.code == 250) {
std::set<std::string> methods;
std::string cookiefile;
/*
* 250-AUTH METHODS=COOKIE,SAFECOOKIE COOKIEFILE="/home/x/.tor/control_auth_cookie"
* 250-AUTH METHODS=NULL
* 250-AUTH METHODS=HASHEDPASSWORD
*/
BOOST_FOREACH(const std::string &s, reply.lines) {
std::pair<std::string,std::string> l = SplitTorReplyLine(s);
if (l.first == "AUTH") {
std::map<std::string,std::string> m = ParseTorReplyMapping(l.second);
std::map<std::string,std::string>::iterator i;
if ((i = m.find("METHODS")) != m.end())
boost::split(methods, i->second, boost::is_any_of(","));
if ((i = m.find("COOKIEFILE")) != m.end())
cookiefile = i->second;
} else if (l.first == "VERSION") {
std::map<std::string,std::string> m = ParseTorReplyMapping(l.second);
std::map<std::string,std::string>::iterator i;
if ((i = m.find("Tor")) != m.end()) {
LogPrint("tor", "tor: Connected to Tor version %s\n", i->second);
}
}
}
BOOST_FOREACH(const std::string &s, methods) {
LogPrint("tor", "tor: Supported authentication method: %s\n", s);
}
// Prefer NULL, otherwise SAFECOOKIE. If a password is provided, use HASHEDPASSWORD
/* Authentication:
* cookie: hex-encoded ~/.tor/control_auth_cookie
* password: "password"
*/
std::string torpassword = GetArg("-torpassword", "");
if (!torpassword.empty()) {
if (methods.count("HASHEDPASSWORD")) {
LogPrint("tor", "tor: Using HASHEDPASSWORD authentication\n");
boost::replace_all(torpassword, "\"", "\\\"");
_conn.Command("AUTHENTICATE \"" + torpassword + "\"", boost::bind(&TorController::auth_cb, this, _1, _2));
} else {
LogPrintf("tor: Password provided with -torpassword, but HASHEDPASSWORD authentication is not available\n");
}
} else if (methods.count("NULL")) {
LogPrint("tor", "tor: Using NULL authentication\n");
_conn.Command("AUTHENTICATE", boost::bind(&TorController::auth_cb, this, _1, _2));
} else if (methods.count("SAFECOOKIE")) {
// Cookie: hexdump -e '32/1 "%02x""\n"' ~/.tor/control_auth_cookie
LogPrint("tor", "tor: Using SAFECOOKIE authentication, reading cookie authentication from %s\n", cookiefile);
std::pair<bool,std::string> status_cookie = ReadBinaryFile(cookiefile, TOR_COOKIE_SIZE);
if (status_cookie.first && status_cookie.second.size() == TOR_COOKIE_SIZE) {
// _conn.Command("AUTHENTICATE " + HexStr(status_cookie.second), boost::bind(&TorController::auth_cb, this, _1, _2));
cookie = std::vector<uint8_t>(status_cookie.second.begin(), status_cookie.second.end());
clientNonce = std::vector<uint8_t>(TOR_NONCE_SIZE, 0);
GetRandBytes(&clientNonce[0], TOR_NONCE_SIZE);
_conn.Command("AUTHCHALLENGE SAFECOOKIE " + HexStr(clientNonce), boost::bind(&TorController::authchallenge_cb, this, _1, _2));
} else {
if (status_cookie.first) {
LogPrintf("tor: Authentication cookie %s is not exactly %i bytes, as is required by the spec\n", cookiefile, TOR_COOKIE_SIZE);
} else {
LogPrintf("tor: Authentication cookie %s could not be opened (check permissions)\n", cookiefile);
}
}
} else if (methods.count("HASHEDPASSWORD")) {
LogPrintf("tor: The only supported authentication mechanism left is password, but no password provided with -torpassword\n");
} else {
LogPrintf("tor: No supported authentication method\n");
}
} else {
LogPrintf("tor: Requesting protocol info failed\n");
}
}
void TorController::connected_cb(TorControlConnection& _conn)
{
reconnect_timeout = RECONNECT_TIMEOUT_START;
// First send a PROTOCOLINFO command to figure out what authentication is expected
if (!_conn.Command("PROTOCOLINFO 1", boost::bind(&TorController::protocolinfo_cb, this, _1, _2)))
LogPrintf("tor: Error sending initial protocolinfo command\n");
}
void TorController::disconnected_cb(TorControlConnection& _conn)
{
// Stop advertising service when disconnected
if (service.IsValid())
RemoveLocal(service);
service = CService();
if (!reconnect)
return;
LogPrint("tor", "tor: Not connected to Tor control port %s, trying to reconnect\n", target);
// Single-shot timer for reconnect. Use exponential backoff.
struct timeval time = MillisToTimeval(int64_t(reconnect_timeout * 1000.0));
if (reconnect_ev)
event_add(reconnect_ev, &time);
reconnect_timeout *= RECONNECT_TIMEOUT_EXP;
}
void TorController::Reconnect()
{
/* Try to reconnect and reestablish if we get booted - for example, Tor
* may be restarting.
*/
if (!conn.Connect(target, boost::bind(&TorController::connected_cb, this, _1),
boost::bind(&TorController::disconnected_cb, this, _1) )) {
LogPrintf("tor: Re-initiating connection to Tor control port %s failed\n", target);
}
}
std::string TorController::GetPrivateKeyFile()
{
return (GetDataDir() / "onion_private_key").string();
}
void TorController::reconnect_cb(evutil_socket_t fd, short what, void *arg)
{
TorController *self = (TorController*)arg;
self->Reconnect();
}
/****** Thread ********/
struct event_base *base;
boost::thread torControlThread;
static void TorControlThread()
{
TorController ctrl(base, GetArg("-torcontrol", DEFAULT_TOR_CONTROL));
event_base_dispatch(base);
}
void StartTorControl(boost::thread_group& threadGroup, CScheduler& scheduler)
{
assert(!base);
#ifdef WIN32
evthread_use_windows_threads();
#else
evthread_use_pthreads();
#endif
base = event_base_new();
if (!base) {
LogPrintf("tor: Unable to create event_base\n");
return;
}
torControlThread = boost::thread(boost::bind(&TraceThread<void (*)()>, "torcontrol", &TorControlThread));
}
void InterruptTorControl()
{
if (base) {
LogPrintf("tor: Thread interrupt\n");
event_base_loopbreak(base);
}
}
void StopTorControl()
{
if (base) {
torControlThread.join();
event_base_free(base);
base = 0;
}
}
Reference in a new issue View git blame Copy permalink