void protocol::inbound_channel_stopped(const code& ec,
channel::ptr node, const std::string& address)
{
log_debug(LOG_PROTOCOL)
<< "Channel stopped (inbound) [" << address << "] "
<< ec.message();
// We never attempt to reconnect inbound connections.
remove_connection(inbound_connections_, node);
}
// new blocks come in - remove txs in new
// old blocks taken out - resubmit txs in old
bool transaction_pool::handle_reorganized(const code& ec, size_t fork_point,
const block::ptr_list& new_blocks, const block::ptr_list& replaced_blocks)
{
if (ec == error::service_stopped)
{
log::debug(LOG_BLOCKCHAIN)
<< "Stopping transaction pool: " << ec.message();
return false;
}
if (ec)
{
log::debug(LOG_BLOCKCHAIN)
<< "Failure in tx pool reorganize handler: " << ec.message();
return false;
}
log::debug(LOG_BLOCKCHAIN)
<< "Reorganize: tx pool size (" << buffer_.size()
<< ") forked at (" << fork_point
<< ") new blocks (" << new_blocks.size()
<< ") replace blocks (" << replaced_blocks.size() << ")";
if (replaced_blocks.empty())
{
// Remove memory pool transactions that also exist in new blocks.
dispatch_.ordered(
std::bind(&transaction_pool::remove,
this, new_blocks));
}
else
{
// See http://www.jwz.org/doc/worse-is-better.html
// for why we take this approach. We return with an error_code.
// An alternative would be resubmit all tx from the cleared blocks.
dispatch_.ordered(
std::bind(&transaction_pool::clear,
this, error::blockchain_reorganized));
}
return true;
}
void session_manual::handle_channel_stop(const code& ec,
const std::string& hostname, uint16_t port)
{
LOG_DEBUG(LOG_NETWORK)
<< "Manual channel stopped: " << ec.message();
// Special case for already connected, do not keep trying.
// After a stop we don't use the caller's start handler, but keep connecting.
if (ec != error::address_in_use)
connect(hostname, port);
}
void protocol_base_base::handle_timer(const code& ec)
{
if (stopped() || deadline::canceled(ec))
return;
log_debug(LOG_PROTOCOL)
<< "Fired " << name_ << " protocol timer on [" << authority() << "] "
<< ec.message();
callback(error::channel_timeout);
}
bool callback_state::succeeded(const code& ec, const std::string& format)
{
if (ec)
{
// May want to change the behavior to decrement vs. zeroizing refs.
error(boost::format(format) % ec.message());
stop(console_result::failure);
return false;
}
return true;
}
void protocol_address::handle_store_addresses(const code& ec)
{
if (stopped())
return;
if (ec)
{
log_error(LOG_PROTOCOL)
<< "Failure storing addresses from [" << authority() << "] "
<< ec.message();
stop(ec);
}
}
void protocol_address::handle_send_get_address(const code& ec)
{
if (stopped())
return;
if (ec)
{
log_debug(LOG_PROTOCOL)
<< "Failure sending get_address [" << authority() << "] "
<< ec.message();
stop(ec);
}
}
// input:
// code guess - a code object containing the user's guess
// output:
// int incorrect - the number of digits in the guess that exist in the secret, but are not correctly placed
//
// Check how many digits are part of the secret code, but were guessed at wrong positions. If an index is set to 6
// we know that the index has been covered and will skip it. If an element in the same spot in secretDigits is set to 6,
// this also means that the value has been covered.
// ASSUMPTION: This is called AFTER checkIncorrect so that it will only check indices that haven't been confirmed
int code::checkIncorrect(code guess) {
vector<int> userGuess = guess.getGuess();
vector<int> secretCode = guess.getSecret();
vector<int> secretDigits = getDigits();
int incorrect = 0;
for (int i=0; i < userGuess.size(); i++) {
//Index has already been confirmed, move on
if (userGuess[i] == 6) {
continue;
}
//Digit IS part of solution, HAS NOT been verified by checkCorrect, but in wrong place
if (find(secretDigits.begin(), secretDigits.end(), userGuess[i]) != secretDigits.end() && userGuess[i] != secretDigits[i] && secretDigits[i] != 6) {
incorrect += 1;
userGuess[i] = 6;
secretDigits[distance( secretDigits.begin(), find(secretDigits.begin(), secretDigits.end(), userGuess[i]))] = 6;
}
}
setDigits(secretDigits);
return incorrect;
}
void session_inbound::handle_channel_start(const code& ec,
channel::ptr channel)
{
if (ec)
{
LOG_INFO(LOG_NETWORK)
<< "Inbound channel failed to start [" << channel->authority()
<< "] " << ec.message();
return;
}
attach_protocols(channel);
};
void protocol::outbound_channel_stopped(const code& ec,
channel::ptr node, const std::string& address)
{
log_debug(LOG_PROTOCOL)
<< "Channel stopped (outbound) [" << address << "] "
<< ec.message();
remove_connection(outbound_connections_, node);
// If not shutdown we always create a replacement oubound connection.
if (ec != error::service_stopped)
new_connection();
}
void p2p::handle_running(const code& ec, result_handler handler)
{
if (ec)
{
LOG_ERROR(LOG_NETWORK)
<< "Error starting outbound session: " << ec.message();
handler(ec);
return;
}
// This is the end of the run sequence.
handler(error::success);
}
void protocol::manual_channel_stopped(const code& ec,
channel::ptr node, const std::string& address, bool relay, size_t retries)
{
log_debug(LOG_PROTOCOL)
<< "Channel stopped (manual) [" << address << "] "
<< ec.message();
remove_connection(manual_connections_, node);
// If not shutdown we always attempt to reconnect manual connections.
if (ec != error::service_stopped)
retry_manual_connection(address, relay, retries);
}
void protocol_ping::handle_send_pong(const code& ec)
{
if (stopped())
return;
if (ec)
{
log::debug(LOG_NETWORK)
<< "Failure sending pong to [" << authority() << "] "
<< ec.message();
stop(ec);
}
}
void protocol_header_sync::handle_send(const code& ec, event_handler complete)
{
if (stopped())
return;
if (ec)
{
log::debug(LOG_PROTOCOL)
<< "Failure sending get headers to sync [" << authority() << "] "
<< ec.message();
complete(ec);
}
}
void protocol_version_31402::handle_verack_sent(const code& ec)
{
if (stopped())
return;
if (ec)
{
LOG_DEBUG(LOG_NETWORK)
<< "Failure sending verack to [" << authority() << "] "
<< ec.message();
set_event(ec);
return;
}
}
bool protocol_header_sync::handle_receive(const code& ec, headers::ptr message,
event_handler complete)
{
if (stopped())
return false;
if (ec)
{
log::debug(LOG_PROTOCOL)
<< "Failure receiving headers from sync ["
<< authority() << "] " << ec.message();
complete(ec);
return false;
}
// A merge failure includes automatic rollback to last trust point.
if (!hashes_.enqueue(message))
{
log::warning(LOG_PROTOCOL)
<< "Failure merging headers from [" << authority() << "]";
complete(error::previous_block_invalid);
return false;
}
const auto next = next_height();
log::info(LOG_PROTOCOL)
<< "Synced headers " << next - message->elements.size()
<< "-" << (next - 1) << " from [" << authority() << "]";
// If we reached the last height the sync is complete/success.
if (next > final_height_)
{
complete(error::success);
return false;
}
// If we received fewer than 2000 the peer is exhausted, try another.
if (message->elements.size() < max_header_response)
{
complete(error::operation_failed);
return false;
}
// This peer has more headers.
send_get_headers(complete);
return true;
}
void protocol::handle_accept(const code& ec, channel::ptr node,
acceptor::ptr accept)
{
// Relisten for connections.
start_accept(ec, accept);
if (ec)
{
log_debug(LOG_PROTOCOL)
<< "Failure accepting connection: " << ec.message();
return;
}
if (inbound_connections_.size() >= max_inbound_)
{
log_debug(LOG_PROTOCOL)
<< "Rejected inbound connection due to connection limit";
return;
}
const auto address = node->address();
if (is_blacklisted(node->address()))
{
log_debug(LOG_PROTOCOL)
<< "Rejected inbound connection due to blacklisted address";
return;
}
if (is_loopback(node))
{
log_debug(LOG_PROTOCOL)
<< "Rejected inbound connection from self";
return;
}
// Save the connection as we are now assured of getting stop event.
inbound_connections_.push_back(node);
// Accepted!
log_info(LOG_PROTOCOL)
<< "Accepted connection from [" << address << "] ("
<< inbound_connections_.size() << " total)";
const auto stop_handler =
dispatch_.ordered_delegate(&protocol::inbound_channel_stopped,
this, _1, node, address.to_string());
start_talking(node, stop_handler, relay_);
}
void protocol_base_base::handle_stop(const code& ec)
{
if (stopped())
return;
log_debug(LOG_PROTOCOL)
<< "Stopped " << name_ << " protocol on [" << authority() << "] "
<< ec.message();
stopped_ = true;
if (deadline_)
deadline_->cancel();
callback(ec);
}
void session::handle_starting(const code& ec, channel::ptr channel,
result_handler handle_started)
{
if (ec)
{
LOG_INFO(LOG_NETWORK)
<< "Channel failed to start [" << channel->authority() << "] "
<< ec.message();
handle_started(ec);
return;
}
attach_handshake_protocols(channel,
BIND_3(handle_handshake, _1, channel, handle_started));
}
int operator%(const code &lhs, const vector<int> &rhs)
// Overloaded operator that returns the number of digits in the code
// in the lhs that match the vector rhs.
{
int count = 0;
if (lhs.size() != rhs.size())
throw rangeError();
for (int i = 0; i < rhs.size(); i++)
if (lhs.seq[i] == rhs[i])
count++;
return count;
}
void session_inbound::handle_channel_start(const code& ec,
channel::ptr channel)
{
if (ec)
{
log::info(LOG_NETWORK)
<< "Inbound channel failed to start [" << channel->authority()
<< "] " << ec.message();
return;
}
attach<protocol_ping>(channel)->start();
attach<protocol_address>(channel)->start();
}
void protocol_ping::handle_send_ping(const code& ec)
{
if (stopped())
return;
if (ec)
{
log::debug(LOG_PROTOCOL)
<< "Failure sending ping to [" << authority() << "] "
<< ec.message();
stop(ec);
return;
}
reset_timer();
}
void protocol::start_accept(const code& ec, acceptor::ptr accept)
{
BITCOIN_ASSERT(accept);
if (ec)
{
log_error(LOG_PROTOCOL)
<< "Error starting listener: " << ec.message();
return;
}
// ACCEPT INCOMING CONNECTIONS
accept->accept(
dispatch_.ordered_delegate(&protocol::handle_accept,
this, _1, _2, accept));
}
void session_outbound::handle_channel_start(const code& ec,
connector::ptr connect, channel::ptr channel)
{
// Treat a start failure just like a stop.
if (ec)
{
log::debug(LOG_NETWORK)
<< "Outbound channel failed to start ["
<< channel->authority() << "] " << ec.message();
new_connection(connect);
return;
}
attach_protocols(channel);
};
// This is fired by the callback (i.e. base timer and stop handler).
void protocol_ping_31402::send_ping(const code& ec)
{
if (stopped())
return;
if (ec && ec != error::channel_timeout)
{
LOG_DEBUG(LOG_NETWORK)
<< "Failure in ping timer for [" << authority() << "] "
<< ec.message();
stop(ec);
return;
}
SEND2(ping{}, handle_send, _1, pong::command);
}
void protocol::handle_handshake(const code& ec, channel::ptr node)
{
if (ec)
{
log_debug(LOG_PROTOCOL) << "Failure in peer handshake ["
<< node->address() << "] " << ec.message();
node->stop(ec);
return;
}
// Attach ping protocol to the new connection (until node stop event).
std::make_shared<protocol_ping>(node, pool_, timeouts_.heartbeat)->start();
// Attach address protocol to the new connection (until node stop event).
std::make_shared<protocol_address>(node, pool_, hosts_, self_)->start();
}
void session::handle_handshake(const code& ec, channel::ptr channel,
result_handler handle_started)
{
if (ec)
{
LOG_DEBUG(LOG_NETWORK)
<< "Failure in handshake with [" << channel->authority()
<< "] " << ec.message();
handle_started(ec);
return;
}
// This will fail if the IP address or nonce is already connected.
network_.store(channel, handle_started);
}
void protocol_seed::handle_send_get_address(const code& ec)
{
if (stopped())
return;
if (ec)
{
log::debug(LOG_PROTOCOL)
<< "Failure sending get_address to seed [" << authority() << "] "
<< ec.message();
set_event(ec);
return;
}
// 2 of 3
set_event(error::success);
}
void protocol::start_connecting(const code& ec,
completion_handler handle_complete)
{
if (ec)
{
log_debug(LOG_PROTOCOL)
<< "Error seeding hosts: " << ec.message();
handle_complete(ec);
return;
}
// Start outbound connection attempts (not concurrent because of strand).
for (size_t channel = 0; channel < max_outbound_; ++channel)
new_connection();
handle_complete(error::success);
}
void session_inbound::start_accept(const code& ec, acceptor::ptr accept)
{
if (stopped())
return;
if (ec)
{
log::error(LOG_NETWORK)
<< "Error starting listener: " << ec.message();
return;
}
// ACCEPT THE NEXT INCOMING CONNECTION
accept->accept(
dispatch_.ordered_delegate(&session_inbound::handle_accept,
shared_from_base<session_inbound>(), _1, _2, accept));
}
