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, 52 insertions, 0 deletions

diff --git a/src/lib/pol/cacep_proto.c b/src/lib/pol/cacep_proto.c
new file mode 100644
index 00000000..9990a05a
--- /dev/null
+++ b/src/lib/pol/cacep_proto.c
@@ -0,0 +1,52 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * CACEP - Read/Write Protocol info
+ *
+ *    Sander Vrijders   <[email protected]>
+ *    Dimitri Staessens <[email protected]>
+ *
+ * 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
+ */
+
+#include "cacep_proto.h"
+
+enum proto_concrete_syntax code_to_syntax(int code)
+{
+        switch(code) {
+        case PROTO_CONCRETE_SYNTAX_CODE__GPB:
+                return PROTO_GPB;
+        case PROTO_CONCRETE_SYNTAX_CODE__ASN_1:
+                return PROTO_ASN_1;
+        case PROTO_CONCRETE_SYNTAX_CODE__FIXED:
+                return PROTO_FIXED;
+        default:
+                return -1;
+        }
+}
+
+int syntax_to_code(enum proto_concrete_syntax stx)
+{
+        switch(stx) {
+        case PROTO_GPB:
+                return PROTO_CONCRETE_SYNTAX_CODE__GPB;
+        case PROTO_ASN_1:
+                return PROTO_CONCRETE_SYNTAX_CODE__ASN_1;
+        case PROTO_FIXED:
+                return PROTO_CONCRETE_SYNTAX_CODE__FIXED;
+        default:
+                return -1;
+        }
+}