bool
OverlayImpl::isPeerUpgrade(beast::http::message const& request)
{
if (! request.upgrade())
return false;
auto const versions = parse_ProtocolVersions(
request.headers["Upgrade"]);
if (versions.size() == 0)
return false;
if (! request.request() && request.status() != 101)
return false;
return true;
}
std::pair<protocol::TMHello, bool>
parseHello (beast::http::message const& m, beast::Journal journal)
{
auto const& h = m.headers;
std::pair<protocol::TMHello, bool> result = { {}, false };
protocol::TMHello& hello = result.first;
// protocol version in TMHello is obsolete,
// it is supplanted by the values in the headers.
{
// Required
auto const iter = h.find ("Upgrade");
if (iter == h.end())
return result;
auto const versions = parse_ProtocolVersions(iter->second);
if (versions.empty())
return result;
hello.set_protoversion(
(static_cast<std::uint32_t>(versions.back().first) << 16) |
(static_cast<std::uint32_t>(versions.back().second)));
hello.set_protoversionmin(
(static_cast<std::uint32_t>(versions.front().first) << 16) |
(static_cast<std::uint32_t>(versions.front().second)));
}
{
// Required
auto const iter = h.find ("Public-Key");
if (iter == h.end())
return result;
RippleAddress addr;
addr.setNodePublic (iter->second);
if (! addr.isValid())
return result;
hello.set_nodepublic (iter->second);
}
{
// Required
auto const iter = h.find ("Session-Signature");
if (iter == h.end())
return result;
// TODO Security Review
hello.set_nodeproof (beast::base64_decode (iter->second));
}
{
auto const iter = h.find (m.request() ?
"User-Agent" : "Server");
if (iter != h.end())
hello.set_fullversion (iter->second);
}
{
auto const iter = h.find ("Network-Time");
if (iter != h.end())
{
std::uint64_t nettime;
if (! beast::lexicalCastChecked(nettime, iter->second))
return result;
hello.set_nettime (nettime);
}
}
{
auto const iter = h.find ("Ledger");
if (iter != h.end())
{
LedgerIndex ledgerIndex;
if (! beast::lexicalCastChecked(ledgerIndex, iter->second))
return result;
hello.set_ledgerindex (ledgerIndex);
}
}
{
auto const iter = h.find ("Closed-Ledger");
if (iter != h.end())
hello.set_ledgerclosed (beast::base64_decode (iter->second));
}
{
auto const iter = h.find ("Previous-Ledger");
if (iter != h.end())
hello.set_ledgerprevious (beast::base64_decode (iter->second));
}
result.second = true;
return result;
}