ircd::net: Add interface to get cipher list from acceptor w/ console cmd.

include/ircd/net/listener.h

@@ -20,6 +20,8 @@ namespace ircd::net
 	std::ostream &operator<<(std::ostream &s, const acceptor &);
 
 	extern conf::item<bool> listen;
+
+	std::string cipher_list(const acceptor &);
 }
 
 struct ircd::net::listener

ircd/net.cc

@@ -945,6 +945,13 @@ ircd::net::listen
 // listener
 //
 
+std::string
+ircd::net::cipher_list(const acceptor &a)
+{
+	auto &ssl(const_cast<acceptor &>(a).ssl);
+	return openssl::cipher_list(*ssl.native_handle());
+}
+
 std::ostream &
 ircd::net::operator<<(std::ostream &s, const listener &a)
 {

modules/console.cc

@@ -4430,6 +4430,41 @@ console_cmd__net__listen__list(opt &out, const string_view &line)
 	return true;
 }
 
+bool
+console_cmd__net__listen__ciphers(opt &out, const string_view &line)
+{
+	const params param{line, " ",
+	{
+		"name",
+	}};
+
+	const auto &name
+	{
+		param["name"]
+	};
+
+	using list = std::list<net::listener>;
+
+	static mods::import<list> listeners
+	{
+		"s_listen", "listeners"
+	};
+
+	const list &l(listeners);
+	for(const auto &listener : l)
+	{
+		if(name && listener.name() != name)
+			continue;
+
+		out << listener.name() << ": " << std::endl
+		    << cipher_list(listener)
+		    << std::endl
+		    << std::endl;
+	}
+
+	return true;
+}
+
 bool
 console_cmd__net__listen(opt &out, const string_view &line)
 {