new(metrics): add host_ifinfo metric

userspace/falco/falco_metrics.cpp

@@ -108,6 +108,40 @@ std::string falco_metrics::to_text(const falco::app::state& state)
 			fs::path fs_path = item.first;
 			prometheus_text += prometheus_metrics_converter.convert_metric_to_text_prometheus("falco_sha256_config_files", "falcosecurity", "falco", {{"file_name", fs_path.filename().stem()}, {"sha256", item.second}});
 		}
+
+		static std::string ifinfo_json_escaped;
+		auto ipv4list = inspector->get_ifaddr_list().get_ipv4_list();
+		auto ipv6list = inspector->get_ifaddr_list().get_ipv6_list();
+		nlohmann::json ipv4_json;
+		nlohmann::json ipv6_json;
+		if(ipv4list)
+		{
+			for (const auto& item : *ipv4list)
+			{
+				if(item.m_name == "lo")
+				{
+					continue;
+				}
+				ipv4_json[item.m_name] = item.addr_to_string();
+			}
+		}
+
+		if(ipv6list)
+		{
+			for (const auto& item : *ipv6list)
+			{
+				if(item.m_name == "lo")
+				{
+					continue;
+				}
+				ipv6_json[item.m_name] = item.addr_to_string();
+			}
+		}
+		nlohmann::json ifinfo_json;
+		ifinfo_json["ipv4"] = ipv4_json;
+		ifinfo_json["ipv6"] = ipv6_json;
+		ifinfo_json_escaped = ifinfo_json.dump();
+		prometheus_text += prometheus_metrics_converter.convert_metric_to_text_prometheus("host_ifinfo_json", "falcosecurity", "falco", {{"host_ifinfo_json", ifinfo_json_escaped}});
 #endif
 
 		for (const std::string& source: inspector->event_sources())

userspace/falco/stats_writer.cpp

@@ -357,6 +357,40 @@ void stats_writer::collector::get_metrics_output_fields_wrapper(
 		metric_name_file_sha256 = "falco.sha256_config_file." + falco::utils::sanitize_metric_name(metric_name_file_sha256);
 		output_fields[metric_name_file_sha256] = item.second;
 	}
+
+	auto ipv4list = inspector->get_ifaddr_list().get_ipv4_list();
+	auto ipv6list = inspector->get_ifaddr_list().get_ipv6_list();
+	nlohmann::json ipv4_json;
+	nlohmann::json ipv6_json;
+	if(ipv4list)
+	{
+		for (const auto& item : *ipv4list)
+		{
+			if(item.m_name == "lo")
+			{
+				continue;
+			}
+			ipv4_json[item.m_name] = item.addr_to_string();
+		}
+	}
+
+	if(ipv6list)
+	{
+		for (const auto& item : *ipv6list)
+		{
+			if(item.m_name == "lo")
+			{
+				continue;
+			}
+			ipv6_json[item.m_name] = item.addr_to_string();
+		}
+	}
+	nlohmann::json ifinfo_json;
+	ifinfo_json["ipv4"] = ipv4_json;
+	ifinfo_json["ipv6"] = ipv6_json;
+	m_ifinfo_json_escaped = ifinfo_json.dump();
+	output_fields["falco.host_ifinfo_json"] = m_ifinfo_json_escaped;
+
 #endif
 	output_fields["evt.source"] = src;
 	for (size_t i = 0; i < sizeof(all_driver_engines) / sizeof(const char*); i++)

userspace/falco/stats_writer.h

@@ -80,6 +80,7 @@ class stats_writer
 		uint64_t m_last_n_evts = 0;
 		uint64_t m_last_n_drops = 0;
 		uint64_t m_last_num_evts = 0;
+		std::string m_ifinfo_json_escaped;
 	};
 
 	stats_writer(const stats_writer&) = delete;