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Structured Overlay support for TTL limited messages:

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When the [overlay] configuration key "expire" is set to 1, proposals
and validations will include a hops field. The hops is incremented with
each relay. Messages with a hop count will be dropped when they exceed
the TTL (Time to Live). Messages containing a hops field will not be
relayed or broadcast to older versions of rippled that don't understand
the field.

This change will not affect normal operation of the network or rippled
instances that do not set "expire" to 1.
This commit is contained in:
Vinnie Falco
2015-04-28 09:24:01 -07:00
committed by Tom Ritchford
parent c77a2f335a
commit 90bb53af20
9 changed files with 168 additions and 44 deletions
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46
src/ripple/overlay/impl/PeerImp.cpp
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@@ -36,8 +36,10 @@
#include <ripple/server/ServerHandler.h>
#include <ripple/protocol/BuildInfo.h>
#include <ripple/protocol/JsonFields.h>
#include <beast/module/core/diagnostic/SemanticVersion.h>
#include <beast/streams/debug_ostream.h>
#include <beast/weak_fn.h>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/asio/io_service.hpp>
#include <functional>
#include <beast/cxx14/memory.h> // <memory>
@@ -100,6 +102,20 @@ PeerImp::run()
if(! strand_.running_in_this_thread())
return strand_.post(std::bind (
&PeerImp::run, shared_from_this()));
{
auto s = getVersion();
if (boost::starts_with(s, "rippled-"))
{
s.erase(s.begin(), s.begin() + 8);
beast::SemanticVersion v;
if (v.parse(s))
{
beast::SemanticVersion av;
av.parse("0.28.0-rc3");
hopsAware_ = v >= av;
}
}
}
if (m_inbound)
{
doAccept();
@@ -1008,6 +1024,10 @@ PeerImp::onMessage (std::shared_ptr <protocol::TMProposeSet> const& m)
{
protocol::TMProposeSet& set = *m;
if (overlay_.setup().expire &&
set.has_hops() && ! slot_->cluster())
set.set_hops(set.hops() + 1);
// VFALCO Magic numbers are bad
if ((set.closetime() + 180) < getApp().getOPs().getCloseTimeNC())
return;
@@ -1276,6 +1296,10 @@ PeerImp::onMessage (std::shared_ptr <protocol::TMValidation> const& m)
error_code ec;
std::uint32_t closeTime = getApp().getOPs().getCloseTimeNC();
if (overlay_.setup().expire &&
m->has_hops() && ! slot_->cluster())
m->set_hops(m->hops() + 1);
if (m->validation ().size () < 50)
{
p_journal_.warning << "Validation: Too small";
@@ -1651,15 +1675,7 @@ PeerImp::checkPropose (Job& job,
// relay untrusted proposal
p_journal_.trace <<
"relaying UNTRUSTED proposal";
std::set<Peer::id_t> peers;
if (getApp().getHashRouter ().swapSet (
proposal->getSuppressionID (), peers, SF_RELAYED))
{
overlay_.foreach (send_if_not (
std::make_shared<Message> (set, protocol::mtPROPOSE_LEDGER),
peer_in_set(peers)));
}
overlay_.relay(set, proposal->getSuppressionID());
}
else
{
@@ -1688,15 +1704,9 @@ PeerImp::checkValidation (Job&, STValidation::pointer val,
validatorsConnection_->onValidation(*val);
#endif
std::set<Peer::id_t> peers;
if (getApp().getOPs ().recvValidation (val, std::to_string(id())) &&
getApp().getHashRouter ().swapSet (
signingHash, peers, SF_RELAYED))
{
overlay_.foreach (send_if_not (
std::make_shared<Message> (*packet, protocol::mtVALIDATION),
peer_in_set(peers)));
}
if (getApp().getOPs ().recvValidation(
val, std::to_string(id())))
overlay_.relay(*packet, signingHash);
}
catch (...)
{