datatype: Describe rt symbol tables

Implement a symbol_table_print() wrapper for the run-time populated
rt_symbol_tables which formats output similar to expr_describe() and
includes the data source.

Since these tables reside in struct output_ctx there is no implicit
connection between data type and therefore providing callbacks for
relevant datat types which feed the data into said wrapper is a simpler
solution than extending expr_describe() itself.

Signed-off-by: Phil Sutter <phil@nwl.cc>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/ct.c b/src/ct.c
index ebfd90a1..67934648 100644
--- a/src/ct.c
+++ b/src/ct.c
@@ -216,10 +216,17 @@ static struct error_record *ct_label_type_parse(struct parse_ctx *ctx,
 	return NULL;
 }
 
+static void ct_label_type_describe(struct output_ctx *octx)
+{
+	rt_symbol_table_describe(octx, CONNLABEL_CONF,
+				 octx->tbl.ct_label, &ct_label_type);
+}
+
 const struct datatype ct_label_type = {
 	.type		= TYPE_CT_LABEL,
 	.name		= "ct_label",
 	.desc		= "conntrack label",
+	.describe	= ct_label_type_describe,
 	.byteorder	= BYTEORDER_HOST_ENDIAN,
 	.size		= CT_LABEL_BIT_SIZE,
 	.basetype	= &bitmask_type,