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-rw-r--r--src/p2p/net_node.inl58
1 files changed, 56 insertions, 2 deletions
diff --git a/src/p2p/net_node.inl b/src/p2p/net_node.inl
index 65db2615c..367ab3b78 100644
--- a/src/p2p/net_node.inl
+++ b/src/p2p/net_node.inl
@@ -37,6 +37,7 @@
#include <boost/optional/optional.hpp>
#include <boost/thread/thread.hpp>
#include <boost/uuid/uuid_io.hpp>
+#include <boost/algorithm/string.hpp>
#include <atomic>
#include <functional>
#include <limits>
@@ -120,6 +121,7 @@ namespace nodetool
command_line::add_arg(desc, arg_ban_list);
command_line::add_arg(desc, arg_p2p_hide_my_port);
command_line::add_arg(desc, arg_no_sync);
+ command_line::add_arg(desc, arg_enable_dns_blocklist);
command_line::add_arg(desc, arg_no_igd);
command_line::add_arg(desc, arg_igd);
command_line::add_arg(desc, arg_out_peers);
@@ -226,7 +228,7 @@ namespace nodetool
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
- bool node_server<t_payload_net_handler>::block_host(epee::net_utils::network_address addr, time_t seconds)
+ bool node_server<t_payload_net_handler>::block_host(epee::net_utils::network_address addr, time_t seconds, bool add_only)
{
if(!addr.is_blockable())
return false;
@@ -240,7 +242,11 @@ namespace nodetool
else
limit = now + seconds;
const std::string host_str = addr.host_str();
- m_blocked_hosts[host_str] = limit;
+ auto it = m_blocked_hosts.find(host_str);
+ if (it == m_blocked_hosts.end())
+ m_blocked_hosts[host_str] = limit;
+ else if (it->second < limit || !add_only)
+ it->second = limit;
// drop any connection to that address. This should only have to look into
// the zone related to the connection, but really make sure everything is
@@ -497,6 +503,8 @@ namespace nodetool
if (command_line::has_arg(vm, arg_no_sync))
m_payload_handler.set_no_sync(true);
+ m_enable_dns_blocklist = command_line::get_arg(vm, arg_enable_dns_blocklist);
+
if ( !set_max_out_peers(public_zone, command_line::get_arg(vm, arg_out_peers) ) )
return false;
else
@@ -1971,6 +1979,52 @@ namespace nodetool
m_gray_peerlist_housekeeping_interval.do_call(boost::bind(&node_server<t_payload_net_handler>::gray_peerlist_housekeeping, this));
m_peerlist_store_interval.do_call(boost::bind(&node_server<t_payload_net_handler>::store_config, this));
m_incoming_connections_interval.do_call(boost::bind(&node_server<t_payload_net_handler>::check_incoming_connections, this));
+ m_dns_blocklist_interval.do_call(boost::bind(&node_server<t_payload_net_handler>::update_dns_blocklist, this));
+ return true;
+ }
+ //-----------------------------------------------------------------------------------
+ template<class t_payload_net_handler>
+ bool node_server<t_payload_net_handler>::update_dns_blocklist()
+ {
+ if (!m_enable_dns_blocklist)
+ return true;
+ if (m_nettype != cryptonote::MAINNET)
+ return true;
+
+ static const std::vector<std::string> dns_urls = {
+ "blocklist.moneropulse.se"
+ , "blocklist.moneropulse.org"
+ , "blocklist.moneropulse.net"
+ , "blocklist.moneropulse.no"
+ , "blocklist.moneropulse.fr"
+ , "blocklist.moneropulse.de"
+ , "blocklist.moneropulse.ch"
+ };
+
+ std::vector<std::string> records;
+ if (!tools::dns_utils::load_txt_records_from_dns(records, dns_urls))
+ return true;
+
+ unsigned good = 0, bad = 0;
+ for (const auto& record : records)
+ {
+ std::vector<std::string> ips;
+ boost::split(ips, record, boost::is_any_of(";"));
+ for (const auto &ip: ips)
+ {
+ const expect<epee::net_utils::network_address> parsed_addr = net::get_network_address(ip, 0);
+ if (!parsed_addr)
+ {
+ MWARNING("Invalid IP address from DNS blocklist: " << ip << " - " << parsed_addr.error());
+ ++bad;
+ continue;
+ }
+ block_host(*parsed_addr, DNS_BLOCKLIST_LIFETIME, true);
+ ++good;
+ }
+ }
+ if (good > 0)
+ MINFO(good << " addresses added to the blocklist");
return true;
}
//-----------------------------------------------------------------------------------