void ofconn_send_reply(const struct ofconn *, struct ofpbuf *);
void ofconn_send_replies(const struct ofconn *, struct list *);
+void ofconn_send_error(const struct ofconn *, const struct ofp_header *request,
+ int error);
int ofconn_pktbuf_retrieve(struct ofconn *, uint32_t id,
struct ofpbuf **bufferp, uint16_t *in_port);