From 34779155d5b69b51aa301e7c111f95ea9c840589 Mon Sep 17 00:00:00 2001
From: flu0r1ne <flu0r1ne@flu0r1ne.net>
Date: Thu, 17 Aug 2023 15:56:11 -0500
Subject: init commit

---
 src/wg2sd.hpp | 134 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 src/wg2sd.hpp

(limited to 'src/wg2sd.hpp')

diff --git a/src/wg2sd.hpp b/src/wg2sd.hpp
new file mode 100644
index 0000000..00028b4
--- /dev/null
+++ b/src/wg2sd.hpp
@@ -0,0 +1,134 @@
+#pragma once
+
+#include <istream>
+#include <exception>
+#include <optional>
+#include <string>
+#include <vector>
+#include <filesystem>
+
+#include <cstdint>
+
+namespace wg2sd {
+
+	struct Interface {
+		// File name, or defaults to "wg"
+		std::string name;
+		// Address=...
+		// List of ip addresses to be assigned to the interface
+		std::vector<std::string> addresses;
+		// PrivateKey=...
+		// Base64-encoded private key string
+		std::string private_key;
+		// MTu=..
+		std::string mtu;
+		// DNS=...
+		// DNS consists of a comma-separated list of IP addresses of DNS servers
+		std::vector<std::string> DNS;
+		// Table=...
+		// By default, wireguard creates routes. This is disabled, when Table=off
+		bool should_create_routes;
+		// Table number (if specific), 0 if auto
+		uint32_t table;
+		// ListenPort=...
+		// The port number on which the interface will listen
+		std::optional<uint16_t> listen_port;
+
+		Interface()
+			: should_create_routes { false }
+			, table { 0 }
+			, listen_port { }
+		{ }
+	};
+
+	struct Cidr {
+		std::string route;
+		bool is_default_route;
+		bool is_ipv4;
+	};
+
+	struct Peer {
+		// Endpoint=...
+		// IP and port of the peer
+		std::string endpoint;
+		// PublicKey=...
+		std::string public_key;
+		// AllowedIPs=...
+		// Comma separated list of allowed ips
+		// Each allowed ip is a CIDR block
+		std::vector<Cidr> allowed_ips;
+		// PersistentAlive=...
+		std::string persistent_keepalive;
+		// PresharedKey=...
+		std::string preshared_key;
+	};
+
+	struct Config {
+		// [Interface]
+		Interface intf;
+		// [Peer]
+		std::vector<Peer> peers;
+		// If one of the peers has a default route
+		bool has_default_route;
+
+		Config()
+			: has_default_route { false }
+		{ }
+	};
+
+	class ConfigurationException : public std::exception {
+
+		public:
+
+			ConfigurationException(std::string const & message)
+				: _message { message }
+			{}
+
+			char const * what() const noexcept override {
+				return _message.c_str();
+			}
+
+		private:
+			std::string _message;
+	};
+
+	class ParsingException : public ConfigurationException {
+
+		public:
+
+			ParsingException(std::string const & message, std::optional<uint64_t> line_no = {})
+				: ConfigurationException(message)
+				, _line_no { line_no }
+			{}
+
+
+			std::optional<uint64_t> line_no() const noexcept {
+				return _line_no;
+			}
+
+		private:
+			std::string _message;
+			std::optional<uint64_t> _line_no;
+	};
+
+	struct SystemdFilespec {
+		std::string name;
+		std::string contents;
+	};
+
+	struct SystemdConfig {
+		SystemdFilespec netdev;
+		SystemdFilespec network;
+		SystemdFilespec private_keyfile;
+		std::vector<SystemdFilespec> symmetric_keyfiles;
+	};
+
+	std::string interface_name_from_filename(std::filesystem::path config_path);
+
+	Config parse_config(std::string const & interface_name, std::istream & stream);
+
+	SystemdConfig gen_systemd_config(Config const & cfg, std::string const & output_path);
+
+	SystemdConfig wg2sd(std::string const & interface_name, std::istream & stream, std::string const & output_path);
+
+};
-- 
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