ipoe: lua: introduced hwaddr field to session object

example function to use mac address as username:
function username(ses)
    return ses:hwaddr()
end

accel-pppd/ctrl/ipoe/lua.c

@@ -33,6 +33,7 @@ static int packet4_options(lua_State *L);
 static int packet4_agent_circuit_id(lua_State *L);
 static int packet4_agent_remote_id(lua_State *L);
 static int packet4_vlan(lua_State *L);
+static int packet4_hwaddr(lua_State *L);
 
 int luaopen_lpack(lua_State *L);
 int luaopen_bit(lua_State *L);
@@ -45,6 +46,7 @@ static const struct luaL_reg packet4_lib [] = {
 	{"agent_circuit_id", packet4_agent_circuit_id},
 	{"agent_remote_id", packet4_agent_remote_id},
 	{"vlan", packet4_vlan},
+	{"hwaddr", packet4_hwaddr},
 	{NULL, NULL}
 };
 
@@ -185,6 +187,21 @@ static int packet4_vlan(lua_State *L)
 	return 1;
 }
 
+static int packet4_hwaddr(lua_State *L)
+{
+	struct ipoe_session *ses = luaL_checkudata(L, 1, IPOE_PACKET4);
+	char str[20];
+
+	if (!ses)
+		return 0;
+
+	sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x",
+			ses->hwaddr[0], ses->hwaddr[1], ses->hwaddr[2], ses->hwaddr[3], ses->hwaddr[4], ses->hwaddr[5]);
+	lua_pushstring(L, str);
+
+	return 1;
+}
+
 static void init_lua()
 {
 	__serial = serial;