lib: Exchange protocol info during CACEP

This exchanges a protocol name, a protocol version and concrete syntax
for the protocol upon CACEP. For CDAP, only version 1 and GPB are
supported. No lists for other supported versions or syntaxes are
exchanged (but the proto file supports it). CACEP fails if there is a
mismatch between the protocol names, version and syntax specified by
the communicating parties.

1 files changed, 38 insertions, 0 deletions

diff --git a/src/lib/pol/cacep_proto.proto b/src/lib/pol/cacep_proto.proto
new file mode 100644
index 00000000..f313bfc1
--- /dev/null
+++ b/src/lib/pol/cacep_proto.proto
@@ -0,0 +1,38 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Message for setting Protocol information in CACEP
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+syntax = "proto2";
+
+enum proto_concrete_syntax_code {
+        GPB   = 1;
+        ASN_1 = 2;
+        FIXED = 3;
+}
+
+message cacep_proto_msg {
+        required string protocol                        = 1;
+        required int32 pref_version                     = 2;
+        repeated int32 supp_version                     = 3;
+        required proto_concrete_syntax_code pref_syntax = 4;
+        repeated proto_concrete_syntax_code supp_syntax = 5;
+}