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P2PServer: don't allow multiple connections to/from the same IP

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SChernykh 2021-08-31 10:41:41 +02:00
parent 4757cdb8e2
commit 114f6b627b
1 changed files with 11 additions and 0 deletions
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11
src/p2p_server.cpp
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@ -696,6 +696,17 @@ void P2PServer::P2PClient::reset()
bool P2PServer::P2PClient::on_connect()
{
P2PServer* server = static_cast<P2PServer*>(m_owner);
// Don't allow multiple connections to/from the same IP
// server->m_clientsListLock is already locked here
for (P2PClient* client = static_cast<P2PClient*>(server->m_connectedClientsList->m_next); client != server->m_connectedClientsList; client = static_cast<P2PClient*>(client->m_next)) {
if ((client != this) && (client->m_addr == m_addr)) {
LOGWARN(5, "peer " << static_cast<char*>(m_addrString) << " is already connected as " << static_cast<char*>(client->m_addrString));
return false;
}
}
m_lastAlive = time(nullptr);
return send_handshake_challenge();
}