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Cache responses to addr requests

Browse source 
Prevents a spy from scraping victim's AddrMan by
reconnecting and re-requesting addrs.
This commit is contained in:
Gleb Naumenko 2020-05-16 21:05:44 -04:00
parent 7cc0e8101f
commit acd6135b43
3 changed files with 43 additions and 1 deletions
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11
src/net.cpp
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@ -2539,6 +2539,17 @@ std::vector<CAddress> CConnman::GetAddresses()
return addresses;
}
std::vector<CAddress> CConnman::GetAddresses(Network requestor_network)
{
const auto current_time = GetTime<std::chrono::microseconds>();
if (m_addr_response_caches.find(requestor_network) == m_addr_response_caches.end() ||
m_addr_response_caches[requestor_network].m_update_addr_response < current_time) {
m_addr_response_caches[requestor_network].m_addrs_response_cache = GetAddresses();
m_addr_response_caches[requestor_network].m_update_addr_response = current_time + std::chrono::hours(21) + GetRandMillis(std::chrono::hours(6));
}
return m_addr_response_caches[requestor_network].m_addrs_response_cache;
}
bool CConnman::AddNode(const std::string& strNode)
{
LOCK(cs_vAddedNodes);