ipset: Support comments in the userspace library.

This adds support to the userspace portion of ipset for handling ipsets
with the comment extension enabled. The library revision has been raised
accordingly.

Signed-off-by: Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>

1 files changed, 31 insertions, 0 deletions

diff --git a/lib/print.c b/lib/print.c
index 86a7674..abdfd34 100644
--- a/lib/print.c
+++ b/lib/print.c
@@ -530,6 +530,37 @@ ipset_print_iface(char *buf, unsigned int len,
 }
 
 /**
+ * ipset_print_comment - print arbitrary parameter string
+ * @buf: printing buffer
+ * @len: length of available buffer space
+ * @data: data blob
+ * @opt: the option kind
+ * @env: environment flags
+ *
+ * Print arbitrary string to output buffer.
+ *
+ * Return length of printed string or error size.
+ */
+int ipset_print_comment(char *buf, unsigned int len,
+		       const struct ipset_data *data, enum ipset_opt opt,
+		       uint8_t env UNUSED)
+{
+	const char *comment;
+	int size, offset = 0;
+
+	assert(buf);
+	assert(len > 0);
+	assert(data);
+	assert(opt == IPSET_OPT_ADT_COMMENT);
+
+	comment = ipset_data_get(data, opt);
+	assert(comment);
+	size = snprintf(buf + offset, len, "\"%s\"", comment);
+	SNPRINTF_FAILURE(size, len, offset);
+	return offset;
+}
+
+/**
  * ipset_print_proto - print protocol name
  * @buf: printing buffer
  * @len: length of available buffer space