irmd: Add configuration file support

This adds initial support for configuration files using the C99 TOML
parser (to be installed separately from https://github.com/cktan/tomlc99).

The default location for the IRMd configuration file is
/etc/ouroboros/irmd.conf. This is configurable at build time.
An example file will be installed in the configuration directory with
the name irmd.conf.example.

Config file support can be disabled using the DISABLE_CONFIGFILE build
option.

There were some refactors and changes to the configuration messages
and protobuf files. This works towards consolidation of protobuf C as
an option for more generic handling of serialization/deserialization
of various messages.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/lib/enroll.proto b/src/lib/enroll.proto
new file mode 100644
index 00000000..34ca1847
--- /dev/null
+++ b/src/lib/enroll.proto
@@ -0,0 +1,40 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2023
+ *
+ * Enrollment protocol
+ *
+ *    Dimitri Staessens <dimitri@ouroboros.rocks>
+ *    Sander Vrijders   <sander@ouroboros.rocks>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+syntax = "proto2";
+import "ipcp_config.proto";
+
+message enroll_req_msg {
+        /* TODO authentication */
+        required uint32 magic = 1;
+}
+
+message enroll_resp_msg {
+        required int64           t_sec    = 1;
+        required int32           t_nsec   = 2;
+        required int32           response = 3;
+        optional ipcp_config_msg conf     = 4;
+}
+
+message enroll_ack_msg {
+        required int32 response = 1;
+}