From e35bbb1e88e52f123c3e2f1d2bdbe2f704d0abe9 Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Tue, 22 Dec 2020 02:11:52 +0000
Subject: [PATCH] ban lists may now include subnets

---
 src/daemon/command_parser_executor.cpp | 12 +++++++++---
 src/p2p/net_node.inl                   | 12 +++++++++---
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/src/daemon/command_parser_executor.cpp b/src/daemon/command_parser_executor.cpp
index 6695c3ecd..ab1a8881e 100644
--- a/src/daemon/command_parser_executor.cpp
+++ b/src/daemon/command_parser_executor.cpp
@@ -620,13 +620,19 @@ bool t_command_parser_executor::ban(const std::vector<std::string>& args)
       std::ifstream ifs(ban_list_path.string());
       for (std::string line; std::getline(ifs, line); )
       {
+        auto subnet = net::get_ipv4_subnet_address(line);
+        if (subnet)
+        {
+          ret &= m_executor.ban(subnet->str(), seconds);
+          continue;
+        }
         const expect<epee::net_utils::network_address> parsed_addr = net::get_network_address(line, 0);
-        if (!parsed_addr)
+        if (parsed_addr)
         {
-          std::cout << "Invalid IP address: " << line << " - " << parsed_addr.error() << std::endl;
+          ret &= m_executor.ban(parsed_addr->host_str(), seconds);
           continue;
         }
-        ret &= m_executor.ban(parsed_addr->host_str(), seconds);
+        std::cout << "Invalid IP address or IPv4 subnet: " << line << std::endl;
       }
       return ret;
     }
diff --git a/src/p2p/net_node.inl b/src/p2p/net_node.inl
index 128d17155..0bd971f92 100644
--- a/src/p2p/net_node.inl
+++ b/src/p2p/net_node.inl
@@ -481,13 +481,19 @@ namespace nodetool
       std::istringstream iss(banned_ips);
       for (std::string line; std::getline(iss, line); )
       {
+        auto subnet = net::get_ipv4_subnet_address(line);
+        if (subnet)
+        {
+          block_subnet(*subnet, std::numeric_limits<time_t>::max());
+          continue;
+        }
         const expect<epee::net_utils::network_address> parsed_addr = net::get_network_address(line, 0);
-        if (!parsed_addr)
+        if (parsed_addr)
         {
-          MERROR("Invalid IP address: " << line << " - " << parsed_addr.error());
+          block_host(*parsed_addr, std::numeric_limits<time_t>::max());
           continue;
         }
-        block_host(*parsed_addr, std::numeric_limits<time_t>::max());
+        MERROR("Invalid IP address or IPv4 subnet: " << line);
       }
     }