#define NX_MATCH_H 1
#include <stdint.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include "openvswitch/types.h"
struct cls_rule;
+struct ds;
+struct flow;
struct ofpbuf;
+struct nx_action_reg_load;
+struct nx_action_reg_move;
/* Nicira Extended Match (NXM) flexible flow match helper functions.
*
char *nx_match_to_string(const uint8_t *, unsigned int match_len);
int nx_match_from_string(const char *, struct ofpbuf *);
+void nxm_parse_reg_move(struct nx_action_reg_move *, const char *);
+void nxm_parse_reg_load(struct nx_action_reg_load *, const char *);
+
+void nxm_format_reg_move(const struct nx_action_reg_move *, struct ds *);
+void nxm_format_reg_load(const struct nx_action_reg_load *, struct ds *);
+
+int nxm_check_reg_move(const struct nx_action_reg_move *, const struct flow *);
+int nxm_check_reg_load(const struct nx_action_reg_load *, const struct flow *);
+
+void nxm_execute_reg_move(const struct nx_action_reg_move *, struct flow *);
+void nxm_execute_reg_load(const struct nx_action_reg_load *, struct flow *);
+
+int nxm_field_bytes(uint32_t header);
+int nxm_field_bits(uint32_t header);
+
+const char *nxm_parse_field_bits(const char *s,
+ uint32_t *headerp, int *ofsp, int *n_bitsp);
+void nxm_format_field_bits(struct ds *, uint32_t header, int ofs, int n_bits);
+
+/* Dealing with the 'ofs_nbits' members of struct nx_action_reg_load and struct
+ * nx_action_multipath. */
+
+static inline ovs_be16
+nxm_encode_ofs_nbits(int ofs, int n_bits)
+{
+ return htons((ofs << 6) | (n_bits - 1));
+}
+
+static inline int
+nxm_decode_ofs(ovs_be16 ofs_nbits)
+{
+ return ntohs(ofs_nbits) >> 6;
+}
+
+static inline int
+nxm_decode_n_bits(ovs_be16 ofs_nbits)
+{
+ return (ntohs(ofs_nbits) & 0x3f) + 1;
+}
+\f
/* Upper bound on the length of an nx_match. The longest nx_match (assuming
* we implement 4 registers) would be:
*
*/
#define NXM_MAX_LEN 192
+/* This is my guess at the length of a "typical" nx_match, for use in
+ * predicting space requirements. */
+#define NXM_TYPICAL_LEN 64
+
#endif /* nx-match.h */