char *ofp_to_string(const void *, size_t, int verbosity);
char *ofp_match_to_string(const struct ofp_match *, int verbosity);
char *ofp_packet_to_string(const void *data, size_t len, size_t total_len);
char *ofp_message_type_to_string(uint8_t type);
char *ofp_to_string(const void *, size_t, int verbosity);
char *ofp_match_to_string(const struct ofp_match *, int verbosity);
char *ofp_packet_to_string(const void *data, size_t len, size_t total_len);
char *ofp_message_type_to_string(uint8_t type);