struct ofpbuf *ofputil_encode_packet_in(const struct ofputil_packet_in *,
enum nx_packet_in_format);
+const char *ofputil_packet_in_reason_to_string(enum ofp_packet_in_reason);
+bool ofputil_packet_in_reason_from_string(const char *,
+ enum ofp_packet_in_reason *);
+
/* Abstract packet-out message. */
struct ofputil_packet_out {
const void *packet; /* Packet data, if buffer_id == UINT32_MAX. */