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p2p: use the fallback seed IPs when not enough seeds are found

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In case the DNS seed(s) is/are down, which would otherwise
cause the fallback seeds to never be used. Also if the seeds
resolve to too few IPs.
This commit is contained in:
moneromooo-monero 2017-03-17 23:39:47 +00:00
parent c6102d5c1b
commit c1c9eeaaf7
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GPG key ID: 686F07454D6CEFC3
2 changed files with 63 additions and 26 deletions
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4
src/p2p/net_node.h
View file

@ -191,7 +191,6 @@ namespace nodetool
bool parse_peer_from_string(nodetool::net_address& pe, const std::string& node_addr);
bool handle_command_line(
const boost::program_options::variables_map& vm
, bool testnet
);
bool idle_worker();
bool handle_remote_peerlist(const std::list<peerlist_entry>& peerlist, time_t local_time, const epee::net_utils::connection_context_base& context);
@ -218,6 +217,7 @@ namespace nodetool
void cache_connect_fail_info(const net_address& addr);
bool is_addr_recently_failed(const net_address& addr);
bool is_priority_node(const net_address& na);
std::set<std::string> get_seed_nodes(bool testnet) const;
template <class Container>
bool connect_to_peerlist(const Container& peers);
@ -321,6 +321,8 @@ namespace nodetool
epee::critical_section m_ip_fails_score_lock;
std::map<uint32_t, uint64_t> m_ip_fails_score;
bool m_testnet;
};
}

79
src/p2p/net_node.inl
View file

@ -65,6 +65,7 @@
#define NET_MAKE_IP(b1,b2,b3,b4) ((LPARAM)(((DWORD)(b1)<<24)+((DWORD)(b2)<<16)+((DWORD)(b3)<<8)+((DWORD)(b4))))
#define MIN_WANTED_SEED_NODES 12
namespace nodetool
{
@ -287,10 +288,9 @@ namespace nodetool
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::handle_command_line(
const boost::program_options::variables_map& vm
, bool testnet
)
{
auto p2p_bind_arg = testnet ? arg_testnet_p2p_bind_port : arg_p2p_bind_port;
auto p2p_bind_arg = m_testnet ? arg_testnet_p2p_bind_port : arg_p2p_bind_port;
m_bind_ip = command_line::get_arg(vm, arg_p2p_bind_ip);
m_port = command_line::get_arg(vm, p2p_bind_arg);
@ -309,7 +309,7 @@ namespace nodetool
bool r = parse_peer_from_string(pe.adr, pr_str);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse address from string: " << pr_str);
if (pe.adr.port == 0)
pe.adr.port = testnet ? ::config::testnet::P2P_DEFAULT_PORT : ::config::P2P_DEFAULT_PORT;
pe.adr.port = m_testnet ? ::config::testnet::P2P_DEFAULT_PORT : ::config::P2P_DEFAULT_PORT;
m_command_line_peers.push_back(pe);
}
}
@ -398,14 +398,11 @@ namespace nodetool
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::init(const boost::program_options::variables_map& vm)
std::set<std::string> node_server<t_payload_net_handler>::get_seed_nodes(bool testnet) const
{
std::set<std::string> full_addrs;
bool testnet = command_line::get_arg(vm, command_line::arg_testnet_on);
if (testnet)
{
memcpy(&m_network_id, &::config::testnet::NETWORK_ID, 16);
full_addrs.insert("212.83.175.67:28080");
full_addrs.insert("5.9.100.248:28080");
full_addrs.insert("163.172.182.165:28080");
@ -413,6 +410,32 @@ namespace nodetool
full_addrs.insert("212.83.172.165:28080");
}
else
{
full_addrs.insert("107.152.130.98:18080");
full_addrs.insert("212.83.175.67:18080");
full_addrs.insert("5.9.100.248:18080");
full_addrs.insert("163.172.182.165:18080");
full_addrs.insert("161.67.132.39:18080");
full_addrs.insert("198.74.231.92:18080");
full_addrs.insert("195.154.123.123:28080");
full_addrs.insert("212.83.172.165:28080");
}
return full_addrs;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::init(const boost::program_options::variables_map& vm)
{
std::set<std::string> full_addrs;
m_testnet = command_line::get_arg(vm, command_line::arg_testnet_on);
if (m_testnet)
{
memcpy(&m_network_id, &::config::testnet::NETWORK_ID, 16);
full_addrs = get_seed_nodes(true);
}
else
{
memcpy(&m_network_id, &::config::NETWORK_ID, 16);
// for each hostname in the seed nodes list, attempt to DNS resolve and
@ -483,18 +506,16 @@ namespace nodetool
++i;
}
if (!full_addrs.size())
// append the fallback nodes if we have too few seed nodes to start with
if (full_addrs.size() < MIN_WANTED_SEED_NODES)
{
if (full_addrs.empty())
MINFO("DNS seed node lookup either timed out or failed, falling back to defaults");
else
MINFO("Not enough DNS seed nodes found, using fallback defaults too");
full_addrs.insert("107.152.130.98:18080");
full_addrs.insert("212.83.175.67:18080");
full_addrs.insert("5.9.100.248:18080");
full_addrs.insert("163.172.182.165:18080");
full_addrs.insert("161.67.132.39:18080");
full_addrs.insert("198.74.231.92:18080");
full_addrs.insert("195.154.123.123:28080");
full_addrs.insert("212.83.172.165:28080");
for (const auto &peer: get_seed_nodes(false))
full_addrs.insert(peer);
}
}
@ -505,14 +526,14 @@ namespace nodetool
}
MDEBUG("Number of seed nodes: " << m_seed_nodes.size());
bool res = handle_command_line(vm, testnet);
bool res = handle_command_line(vm);
CHECK_AND_ASSERT_MES(res, false, "Failed to handle command line");
auto config_arg = testnet ? command_line::arg_testnet_data_dir : command_line::arg_data_dir;
auto config_arg = m_testnet ? command_line::arg_testnet_data_dir : command_line::arg_data_dir;
m_config_folder = command_line::get_arg(vm, config_arg);
if ((!testnet && m_port != std::to_string(::config::P2P_DEFAULT_PORT))
|| (testnet && m_port != std::to_string(::config::testnet::P2P_DEFAULT_PORT))) {
if ((!m_testnet && m_port != std::to_string(::config::P2P_DEFAULT_PORT))
|| (m_testnet && m_port != std::to_string(::config::testnet::P2P_DEFAULT_PORT))) {
m_config_folder = m_config_folder + "/" + m_port;
}
@ -1082,6 +1103,7 @@ namespace nodetool
{
size_t try_count = 0;
size_t current_index = crypto::rand<size_t>()%m_seed_nodes.size();
bool fallback_nodes_added = false;
while(true)
{
if(m_net_server.is_stop_signal_sent())
@ -1090,10 +1112,24 @@ namespace nodetool
if(try_to_connect_and_handshake_with_new_peer(m_seed_nodes[current_index], true))
break;
if(++try_count > m_seed_nodes.size())
{
if (!fallback_nodes_added)
{
MWARNING("Failed to connect to any of seed peers, trying fallback seeds");
for (const auto &peer: get_seed_nodes(m_testnet))
{
MDEBUG("Fallback seed node: " << peer);
append_net_address(m_seed_nodes, peer);
}
fallback_nodes_added = true;
// continue for another few cycles
}
else
{
MWARNING("Failed to connect to any of seed peers, continuing without seeds");
break;
}
}
if(++current_index >= m_seed_nodes.size())
current_index = 0;
}
@ -1654,7 +1690,6 @@ namespace nodetool
bool node_server<t_payload_net_handler>::parse_peers_and_add_to_container(const boost::program_options::variables_map& vm, const command_line::arg_descriptor<std::vector<std::string> > & arg, Container& container)
{
std::vector<std::string> perrs = command_line::get_arg(vm, arg);
bool testnet = command_line::get_arg(vm, command_line::arg_testnet_on);
for(const std::string& pr_str: perrs)
{
@ -1662,7 +1697,7 @@ namespace nodetool
bool r = parse_peer_from_string(na, pr_str);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse address from string: " << pr_str);
if (na.port == 0)
na.port = testnet ? ::config::testnet::P2P_DEFAULT_PORT : ::config::P2P_DEFAULT_PORT;
na.port = m_testnet ? ::config::testnet::P2P_DEFAULT_PORT : ::config::P2P_DEFAULT_PORT;
container.push_back(na);
}