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rippled/src/ripple/overlay/impl/ConnectAttempt.cpp
Vinnie Falco cd38492ceb Changes for Beast
2016-05-12 19:24:35 -04:00

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//------------------------------------------------------------------------------
/*
This file is part of rippled: https://github.com/ripple/rippled
Copyright (c) 2012, 2013 Ripple Labs Inc.
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#include <BeastConfig.h>
#include <ripple/overlay/Cluster.h>
#include <ripple/overlay/impl/ConnectAttempt.h>
#include <ripple/overlay/impl/PeerImp.h>
#include <ripple/overlay/impl/Tuning.h>
#include <ripple/json/json_reader.h>
#include <beast/core/to_string.hpp>
#include <beast/http/read.hpp>
#include <beast/http/write.hpp>
namespace ripple {
ConnectAttempt::ConnectAttempt (Application& app, boost::asio::io_service& io_service,
endpoint_type const& remote_endpoint, Resource::Consumer usage,
beast::asio::ssl_bundle::shared_context const& context,
std::uint32_t id, PeerFinder::Slot::ptr const& slot,
beast::Journal journal, OverlayImpl& overlay)
: Child (overlay)
, app_ (app)
, id_ (id)
, sink_ (journal, OverlayImpl::makePrefix(id))
, journal_ (sink_)
, remote_endpoint_ (remote_endpoint)
, usage_ (usage)
, strand_ (io_service)
, timer_ (io_service)
, ssl_bundle_ (std::make_unique<beast::asio::ssl_bundle>(
context, io_service))
, socket_ (ssl_bundle_->socket)
, stream_ (ssl_bundle_->stream)
, slot_ (slot)
{
JLOG(journal_.debug()) <<
"Connect " << remote_endpoint;
}
ConnectAttempt::~ConnectAttempt()
{
if (slot_ != nullptr)
overlay_.peerFinder().on_closed(slot_);
JLOG(journal_.trace()) <<
"~ConnectAttempt";
}
void
ConnectAttempt::stop()
{
if (! strand_.running_in_this_thread())
return strand_.post(std::bind(
&ConnectAttempt::stop, shared_from_this()));
if (stream_.next_layer().is_open())
{
JLOG(journal_.debug()) <<
"Stop";
}
close();
}
void
ConnectAttempt::run()
{
error_code ec;
stream_.next_layer().async_connect (remote_endpoint_,
strand_.wrap (std::bind (&ConnectAttempt::onConnect,
shared_from_this(), beast::asio::placeholders::error)));
}
//------------------------------------------------------------------------------
void
ConnectAttempt::close()
{
assert(strand_.running_in_this_thread());
if (stream_.next_layer().is_open())
{
error_code ec;
timer_.cancel(ec);
socket_.close(ec);
JLOG(journal_.debug()) <<
"Closed";
}
}
void
ConnectAttempt::fail (std::string const& reason)
{
assert(strand_.running_in_this_thread());
if (stream_.next_layer().is_open())
{
JLOG(journal_.debug()) <<
reason;
}
close();
}
void
ConnectAttempt::fail (std::string const& name, error_code ec)
{
assert(strand_.running_in_this_thread());
if (stream_.next_layer().is_open())
{
JLOG(journal_.debug()) <<
name << ": " << ec.message();
}
close();
}
void
ConnectAttempt::setTimer()
{
error_code ec;
timer_.expires_from_now(std::chrono::seconds(15), ec);
if (ec)
{
JLOG(journal_.error()) <<
"setTimer: " << ec.message();
return;
}
timer_.async_wait(strand_.wrap(std::bind(
&ConnectAttempt::onTimer, shared_from_this(),
beast::asio::placeholders::error)));
}
void
ConnectAttempt::cancelTimer()
{
error_code ec;
timer_.cancel(ec);
}
void
ConnectAttempt::onTimer (error_code ec)
{
if (! stream_.next_layer().is_open())
return;
if (ec == boost::asio::error::operation_aborted)
return;
if (ec)
{
// This should never happen
JLOG(journal_.error()) <<
"onTimer: " << ec.message();
return close();
}
fail("Timeout");
}
void
ConnectAttempt::onConnect (error_code ec)
{
cancelTimer();
if(ec == boost::asio::error::operation_aborted)
return;
endpoint_type local_endpoint;
if(! ec)
local_endpoint = stream_.next_layer().local_endpoint(ec);
if(ec)
return fail("onConnect", ec);
if(! stream_.next_layer().is_open())
return;
JLOG(journal_.trace()) <<
"onConnect";
setTimer();
stream_.set_verify_mode (boost::asio::ssl::verify_none);
stream_.async_handshake (boost::asio::ssl::stream_base::client,
strand_.wrap (std::bind (&ConnectAttempt::onHandshake,
shared_from_this(), beast::asio::placeholders::error)));
}
void
ConnectAttempt::onHandshake (error_code ec)
{
cancelTimer();
if(! stream_.next_layer().is_open())
return;
if(ec == boost::asio::error::operation_aborted)
return;
endpoint_type local_endpoint;
if (! ec)
local_endpoint = stream_.next_layer().local_endpoint(ec);
if(ec)
return fail("onHandshake", ec);
JLOG(journal_.trace()) <<
"onHandshake";
if (! overlay_.peerFinder().onConnected (slot_,
beast::IPAddressConversion::from_asio (local_endpoint)))
return fail("Duplicate connection");
auto sharedValue = makeSharedValue(
stream_.native_handle(), journal_);
if (! sharedValue)
return close(); // makeSharedValue logs
req_ = makeRequest(! overlay_.peerFinder().config().peerPrivate,
remote_endpoint_.address());
auto const hello = buildHello (
*sharedValue,
overlay_.setup().public_ip,
beast::IPAddressConversion::from_asio(remote_endpoint_),
app_);
appendHello (req_.headers, hello);
setTimer();
beast::http::async_write(stream_, req_,
strand_.wrap (std::bind (&ConnectAttempt::onWrite,
shared_from_this(), beast::asio::placeholders::error)));
}
void
ConnectAttempt::onWrite (error_code ec)
{
cancelTimer();
if(! stream_.next_layer().is_open())
return;
if(ec == boost::asio::error::operation_aborted)
return;
if(ec)
return fail("onWrite", ec);
beast::http::async_read(stream_, read_buf_, response_,
strand_.wrap(std::bind(&ConnectAttempt::onRead,
shared_from_this(), beast::asio::placeholders::error)));
}
void
ConnectAttempt::onRead (error_code ec)
{
cancelTimer();
if(! stream_.next_layer().is_open())
return;
if(ec == boost::asio::error::operation_aborted)
return;
if(ec == boost::asio::error::eof)
{
JLOG(journal_.info()) <<
"EOF";
setTimer();
return stream_.async_shutdown(strand_.wrap(std::bind(
&ConnectAttempt::onShutdown, shared_from_this(),
beast::asio::placeholders::error)));
}
if(ec)
return fail("onRead", ec);
processResponse();
}
void
ConnectAttempt::onShutdown (error_code ec)
{
cancelTimer();
if (! ec)
{
JLOG(journal_.error()) <<
"onShutdown: expected error condition";
return close();
}
if (ec != boost::asio::error::eof)
return fail("onShutdown", ec);
close();
}
//--------------------------------------------------------------------------
auto
ConnectAttempt::makeRequest (bool crawl,
boost::asio::ip::address const& remote_address) ->
request_type
{
request_type m;
m.method = "GET";
m.url = "/";
m.version = 11;
m.headers.insert ("User-Agent", BuildInfo::getFullVersionString());
m.headers.insert ("Upgrade", "RTXP/1.2");
//std::string("RTXP/") + to_string (BuildInfo::getCurrentProtocol()));
m.headers.insert ("Connection", "Upgrade");
m.headers.insert ("Connect-As", "Peer");
m.headers.insert ("Crawl", crawl ? "public" : "private");
return m;
}
void
ConnectAttempt::processResponse()
{
if (response_.status == 503)
{
Json::Value json;
Json::Reader r;
auto const success = r.parse(beast::to_string(response_.body.data()), json);
if (success)
{
if (json.isObject() && json.isMember("peer-ips"))
{
Json::Value const& ips = json["peer-ips"];
if (ips.isArray())
{
std::vector<boost::asio::ip::tcp::endpoint> eps;
eps.reserve(ips.size());
for (auto const& v : ips)
{
if (v.isString())
{
error_code ec;
auto const ep = parse_endpoint(v.asString(), ec);
if (!ec)
eps.push_back(ep);
}
}
overlay_.peerFinder().onRedirects(
remote_endpoint_, eps);
}
}
}
}
if (! OverlayImpl::isPeerUpgrade(response_))
{
JLOG(journal_.info()) <<
"HTTP Response: " << response_.status << " " << response_.reason;
return close();
}
auto hello = parseHello (false, response_.headers, journal_);
if(! hello)
return fail("processResponse: Bad TMHello");
auto sharedValue = makeSharedValue(
ssl_bundle_->stream.native_handle(), journal_);
if(! sharedValue)
return close(); // makeSharedValue logs
auto publicKey = verifyHello (*hello,
*sharedValue,
overlay_.setup().public_ip,
beast::IPAddressConversion::from_asio(remote_endpoint_),
journal_, app_);
if(! publicKey)
return close(); // verifyHello logs
JLOG(journal_.info()) <<
"Public Key: " << toBase58 (
TokenType::TOKEN_NODE_PUBLIC,
*publicKey);
auto const protocol =
BuildInfo::make_protocol(hello->protoversion());
JLOG(journal_.info()) <<
"Protocol: " << to_string(protocol);
auto member = app_.cluster().member(*publicKey);
if (member)
{
JLOG(journal_.info()) <<
"Cluster name: " << *member;
}
auto const result = overlay_.peerFinder().activate (slot_,
*publicKey, static_cast<bool>(member));
if (result != PeerFinder::Result::success)
return fail("Outbound slots full");
auto const peer = std::make_shared<PeerImp>(app_,
std::move(ssl_bundle_), read_buf_.data(),
std::move(slot_), std::move(response_),
usage_, *hello, *publicKey, id_, overlay_);
overlay_.add_active (peer);
}
} // ripple
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