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abstract_tcp_server2: improve DoS resistance

This commit is contained in:
moneromooo-monero 2019-04-20 12:24:29 +00:00 committed by wowario
parent 2fb6c1f80d
commit 2a5f743d0a
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GPG Key ID: 24DCBE762DE9C111
1 changed files with 5 additions and 4 deletions
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9
contrib/epee/include/net/abstract_tcp_server2.inl
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@ -54,6 +54,9 @@
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net"
#define AGGRESSIVE_TIMEOUT_THRESHOLD 120 // sockets
#define NEW_CONNECTION_TIMEOUT_LOCAL 1200000 // 2 minutes
#define NEW_CONNECTION_TIMEOUT_REMOTE 10000 // 10 seconds
#define DEFAULT_TIMEOUT_MS_LOCAL 1800000 // 30 minutes
#define DEFAULT_TIMEOUT_MS_REMOTE 300000 // 5 minutes
#define TIMEOUT_EXTRA_MS_PER_BYTE 0.2
@ -189,7 +192,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
m_protocol_handler.after_init_connection();
reset_timer(get_default_timeout(), false);
reset_timer(boost::posix_time::milliseconds(m_local ? NEW_CONNECTION_TIMEOUT_LOCAL : NEW_CONNECTION_TIMEOUT_REMOTE), false);
// first read on the raw socket to detect SSL for the server
buffer_ssl_init_fill = 0;
@ -691,7 +694,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
{
unsigned count;
try { count = host_count(m_host); } catch (...) { count = 0; }
const unsigned shift = std::min(std::max(count, 1u) - 1, 8u);
const unsigned shift = get_state().sock_count > AGGRESSIVE_TIMEOUT_THRESHOLD ? std::min(std::max(count, 1u) - 1, 8u) : 0;
boost::posix_time::milliseconds timeout(0);
if (m_local)
timeout = boost::posix_time::milliseconds(DEFAULT_TIMEOUT_MS_LOCAL >> shift);
@ -730,8 +733,6 @@ PRAGMA_WARNING_DISABLE_VS(4355)
template<class t_protocol_handler>
void connection<t_protocol_handler>::reset_timer(boost::posix_time::milliseconds ms, bool add)
{
if (m_connection_type != e_connection_type_RPC)
return;
MTRACE("Setting " << ms << " expiry");
auto self = safe_shared_from_this();
if(!self)