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P2PServer: ban peers only after handshake finished and failed

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SChernykh 2021-08-29 17:26:30 +02:00
parent 541b3c653d
commit 456f5d356f
2 changed files with 20 additions and 4 deletions
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21
src/p2p_server.cpp
View file

@ -663,6 +663,7 @@ P2PServer::P2PClient::P2PClient()
, m_handshakeChallenge(0)
, m_handshakeSolutionSent(false)
, m_handshakeComplete(false)
, m_handshakeInvalid(false)
, m_listenPort(-1)
, m_lastPeerListRequest(0)
, m_lastAlive(0)
@ -684,6 +685,7 @@ void P2PServer::P2PClient::reset()
m_handshakeChallenge = 0;
m_handshakeSolutionSent = false;
m_handshakeComplete = false;
m_handshakeInvalid = false;
m_listenPort = -1;
m_lastPeerListRequest = 0;
m_lastAlive = 0;
@ -1010,7 +1012,7 @@ void P2PServer::P2PClient::send_handshake_solution(const uint8_t (&challenge)[CH
memcpy(p, work->solution_salt, CHALLENGE_SIZE);
p += CHALLENGE_SIZE;
if (work->client->m_handshakeComplete) {
if (work->client->m_handshakeComplete && !work->client->m_handshakeInvalid) {
work->client->on_after_handshake(p);
}
@ -1019,6 +1021,12 @@ void P2PServer::P2PClient::send_handshake_solution(const uint8_t (&challenge)[CH
if (result) {
work->client->m_handshakeSolutionSent = true;
if (work->client->m_handshakeInvalid) {
work->client->ban(DEFAULT_BAN_TIME);
work->server->remove_peer_from_list(work->client);
work->client->close();
}
}
else {
work->client->close();
@ -1119,19 +1127,26 @@ bool P2PServer::P2PClient::on_handshake_solution(const uint8_t* buf)
if (high) {
LOGWARN(5, "peer " << static_cast<char*>(m_addrString) << " handshake doesn't have enough PoW");
return false;
m_handshakeInvalid = true;
}
}
if (!check_handshake_solution(solution, solution_salt)) {
LOGWARN(5, "peer " << static_cast<char*>(m_addrString) << " handshake failed");
return false;
m_handshakeInvalid = true;
}
m_handshakeComplete = true;
if (!m_handshakeInvalid) {
LOGINFO(5, "peer " << log::Gray() << static_cast<char*>(m_addrString) << log::NoColor() << " handshake completed");
}
if (m_handshakeSolutionSent) {
if (m_handshakeInvalid) {
return false;
}
return m_owner->send(this,
[this, &solution, &solution_salt](void* buf)
{

1
src/p2p_server.h
View file

@ -103,6 +103,7 @@ public:
uint64_t m_handshakeChallenge;
bool m_handshakeSolutionSent;
bool m_handshakeComplete;
bool m_handshakeInvalid;
int m_listenPort;
time_t m_lastPeerListRequest;
time_t m_lastAlive;