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, 58 insertions, 0 deletions

diff --git a/include/ouroboros/serdes-oep.h b/include/ouroboros/serdes-oep.h
new file mode 100644
index 00000000..c503b31a
--- /dev/null
+++ b/include/ouroboros/serdes-oep.h
@@ -0,0 +1,58 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2023
+ *
+ * Ouroboros Enrollment Protocol - serialization/deserialization
+ *
+ *    Dimitri Staessens <dimitri@ouroboros.rocks>
+ *    Sander Vrijders   <sander@ouroboros.rocks>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#ifndef OUROBOROS_LIB_SERDES_OEP_H
+#define OUROBOROS_LIB_SERDES_OEP_H
+
+#include <ouroboros/ipcp.h>
+#include <ouroboros/utils.h>
+
+#include <sys/time.h>
+
+/* Enrollment */
+
+/* no structs yet for req and ack. TODO: authentication. */
+
+struct enroll_resp {
+    struct timespec    t;
+    int                response;
+    struct ipcp_config conf;
+};
+
+
+ssize_t enroll_req_ser(buffer_t buf);
+
+int     enroll_req_des(const buffer_t buf);
+
+ssize_t enroll_resp_ser(const struct enroll_resp * resp,
+                        buffer_t                   buf);
+
+int     enroll_resp_des(struct enroll_resp * resp,
+                        buffer_t             buf);
+
+ssize_t enroll_ack_ser(const int response,
+                       buffer_t  buf);
+
+int     enroll_ack_des(int *          response,
+                       const buffer_t buf);
+
+#endif /* OUROBOROS_LIB_SERDES_OEP_H*/
\ No newline at end of file