On 14.06.2023 18:54, Stephen Hemminger wrote:

On Wed, 14 Jun 2023 11:17:58 +0200
Marcin Szycik [off-list ref] wrote:

quoted

+static void flower_print_pfcp_opts(const char *name, struct rtattr *attr,
+				   char *strbuf, int len)
+{
+	struct rtattr *tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX + 1];
+	struct rtattr *i = RTA_DATA(attr);
+	int rem = RTA_PAYLOAD(attr);
+	__be64 seid;
+	__u8 type;
+
+	parse_rtattr(tb, TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX, i, rem);
+	type = rta_getattr_u8(tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]);
+	seid = rta_getattr_be64(tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID]);
+
+	snprintf(strbuf, len, "%02x:%llx", type, seid);
+}
+

NAK you need to support JSON output.
Also whet if kernel gives partial data.

Hmm... when we were adding GTP opts parsing, you requested to remove JSON
support [1]. Are you sure you want us to add it here?

Could you elaborate about partial data? Are there any similar functions
which properly handle partial data?

[1] https://lore.kernel.org/netdev/20220127091541.6667d4d1@hermes.local (local)

Regards,
Marcin