bgpd: modify bgp as number output

A json AS number API is created in order to output a
given AS number. In order to keep backward compatibility,
if the as-notation uses a number, then the json is encoded
as an integer, otherwise the encoding will be a string.

For what is not relevant to running-configuration, the
as-notation mode is the one used for the BGP instance.

Also, the vty completion gets the configured 'as_pretty'
string value, when an user wants to get the available
BGP instances.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/asn.c b/lib/asn.c
index 4c37cca1f6..27bff1884d 100644
--- a/lib/asn.c
+++ b/lib/asn.c
@@ -183,6 +183,20 @@ const char *asn_mode2str(enum asnotation_mode asnotation)
 			  "Unrecognized AS notation mode");
 }
 
+void asn_asn2json(json_object *json, const char *attr,
+		  as_t asn, enum asnotation_mode asnotation)
+{
+	static char as_str[ASN_STRING_MAX_SIZE];
+
+	if ((asnotation == ASNOTATION_PLAIN) ||
+	    ((asnotation == ASNOTATION_DOT) && asn < UINT16_MAX))
+		json_object_int_add(json, attr, asn);
+	else {
+		asn_asn2asdot(asn, as_str, sizeof(as_str));
+		json_object_string_add(json, attr, as_str);
+	}
+}
+
 void asn_asn2json_array(json_object *jseg_list, as_t asn,
 			enum asnotation_mode asnotation)
 {