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Merge pull request #6962 

1a627e1 p2p: use /16 filtering on IPv4-within-IPv6 addresses (moneromooo-monero)
This commit is contained in:
luigi1111 2020-11-04 10:36:23 -06:00
parent 0be71bcea9 1a627e1f89
commit 4603ec9765
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GPG Key ID: F4ACA0183641E010
1 changed files with 30 additions and 2 deletions
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32
src/p2p/net_node.inl
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@ -1467,6 +1467,20 @@ namespace nodetool
const uint32_t actual_ip = na.as<const epee::net_utils::ipv4_network_address>().ip(); const uint32_t actual_ip = na.as<const epee::net_utils::ipv4_network_address>().ip();
classB.insert(actual_ip & 0x0000ffff); classB.insert(actual_ip & 0x0000ffff);
} }
#if BOOST_VERSION > 106600
else if (cntxt.m_remote_address.get_type_id() == epee::net_utils::ipv6_network_address::get_type_id())
{
const epee::net_utils::network_address na = cntxt.m_remote_address;
const boost::asio::ip::address_v6 &actual_ip = na.as<const epee::net_utils::ipv6_network_address>().ip();
if (actual_ip.is_v4_mapped())
{
boost::asio::ip::address_v4 v4ip = make_address_v4(boost::asio::ip::v4_mapped, actual_ip);
uint32_t actual_ipv4;
memcpy(&actual_ipv4, v4ip.to_bytes().data(), sizeof(actual_ipv4));
classB.insert(actual_ipv4 & ntohl(0xffff0000));
}
}
#endif
return true; return true;
}); });
} }
@ -1502,6 +1516,20 @@ namespace nodetool
uint32_t actual_ip = na.as<const epee::net_utils::ipv4_network_address>().ip(); uint32_t actual_ip = na.as<const epee::net_utils::ipv4_network_address>().ip();
skip = classB.find(actual_ip & 0x0000ffff) != classB.end(); skip = classB.find(actual_ip & 0x0000ffff) != classB.end();
} }
#if BOOST_VERSION > 106600
else if (skip_duplicate_class_B && pe.adr.get_type_id() == epee::net_utils::ipv6_network_address::get_type_id())
{
const epee::net_utils::network_address na = pe.adr;
const boost::asio::ip::address_v6 &actual_ip = na.as<const epee::net_utils::ipv6_network_address>().ip();
if (actual_ip.is_v4_mapped())
{
boost::asio::ip::address_v4 v4ip = make_address_v4(boost::asio::ip::v4_mapped, actual_ip);
uint32_t actual_ipv4;
memcpy(&actual_ipv4, v4ip.to_bytes().data(), sizeof(actual_ipv4));
skip = classB.find(actual_ipv4 & ntohl(0xffff0000)) != classB.end();
}
}
#endif
// consider each host once, to avoid giving undue inflence to hosts running several nodes // consider each host once, to avoid giving undue inflence to hosts running several nodes
if (!skip) if (!skip)
@ -1524,11 +1552,11 @@ namespace nodetool
if (skipped == 0 || !filtered.empty()) if (skipped == 0 || !filtered.empty())
break; break;
if (skipped) if (skipped)
MINFO("Skipping " << skipped << " possible peers as they share a class B with existing peers"); MDEBUG("Skipping " << skipped << " possible peers as they share a class B with existing peers");
} }
if (filtered.empty()) if (filtered.empty())
{ {
MDEBUG("No available peer in " << (use_white_list ? "white" : "gray") << " list filtered by " << next_needed_pruning_stripe); MINFO("No available peer in " << (use_white_list ? "white" : "gray") << " list filtered by " << next_needed_pruning_stripe);
return false; return false;
} }
if (use_white_list) if (use_white_list)