/** @file ../include/arpa/nameser.h

 @internalComponent

 */

 /** @def  NS_PACKETSZ

 maximum packet size

 @publishedAll

 @released

 */

 /** @def  NS_MAXDNAME

 maximum domain name

 @publishedAll

 @released

 */

 /** @def  NS_MAXCDNAME

 maximum compressed domain name

 @publishedAll

 @released

 */

 /** @def  NS_MAXLABEL

 maximum length of domain label

 @publishedAll

 @released

 */

 /** @def  NS_HFIXEDSZ

 bytes of fixed data in header

 @publishedAll

 @released

 */

 /** @def  NS_QFIXEDSZ

 bytes of fixed data in query

 @publishedAll

 @released

 */

 /** @def  NS_RRFIXEDSZ

 bytes of fixed data in r record 

 @publishedAll

 @released

 */

 /** @def  NS_INT32SZ

 bytes of data in a u_int32_t

 @publishedAll

 @released

 */

 /** @def  NS_INT16SZ

 bytes of data in a u_int16_t

 @publishedAll

 @released

 */

 /** @def  NS_INT8SZ

 bytes of data in a u_int8_t 

 @publishedAll

 @released

 */

 /** @def  NS_INADDRSZ

 IPv4 T_A

 @publishedAll

 @released

 */

 /** @def  NS_IN6ADDRSZ

 IPv6 T_AAAA

 @publishedAll

 @released

 */

 /** @def  NS_CMPRSFLGS

 Flag bits indicating name compression.

 @publishedAll

 @released

 */

 /** @def  NS_DEFAULTPORT

 For both TCP and UDP.

 @publishedAll

 @released

 */

 /** @typedef typedef enum __ns_sect ns_sect

 These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord() in synch with it.

 @publishedAll

 @released

 */

 /** @typedef typedef struct __ns_msg ns_msg

 This is a message handle.  It is caller allocated and has no dynamic data.

 This structure is intended to be opaque to all but ns_parse.c, thus the leading _'s on the member names.  Use the accessor functions, not the _'s.

 @publishedAll

 @released

 */

 /** @typedef typedef	struct __ns_rr ns_rr

 This is a parsed record.  It is caller allocated and has no dynamic data.

 @publishedAll

 @released

 */

 /** @typedef typedef enum __ns_flag  ns_flag

 These don't have to be in the same order as in the packet flags word, and they can even overlap in some cases, but they will need to be kept in synch with ns_parse.c:ns_flagdata[].

 @publishedAll

 @released

 */

 /** @typedef typedef enum __ns_opcode ns_opcode

 Currently defined opcodes.

 @publishedAll

 @released

 */

 /** @typedef typedef  enum __ns_rcode ns_rcode

 Currently defined response codes.

 @publishedAll

 @released

 */

 /** @typedef typedef enum __ns_update_operation  ns_update_operation

 BIND_UPDATE

 @publishedAll

 @released

 */

 /** @struct ns_updrec 

 This RR-like structure is particular to UPDATE.

 @publishedAll

 @released

 */

 /** @var ns_updrec::r_prev

 prev record

 */

 /** @var ns_updrec::r_next

 next record

 */

 /** @var ns_updrec::r_section

 ZONE or PREREQUISITE or UPDATE

 */

 /** @var ns_updrec::r_dname

 owner of the RR

 */

 /** @var ns_updrec::r_class

 class number

 */

 /** @var ns_updrec::r_type

 type number

 */

 /** @var ns_updrec::r_ttl

 time to live

 */

 /** @var ns_updrec::r_data

 rdata fields as text string 

 */

 /** @var ns_updrec::r_size

 size of r_data field

 */

 /** @var ns_updrec::r_opcode

 type of operation

 */

 /** @var ns_updrec::r_grpnext

 next record when grouped

 */

 /** @var ns_updrec::r_dp

 databuf to process

 */

 /** @var ns_updrec::r_deldp

 databuf's deleted or overwritten

 */

 /** @var ns_updrec::r_zone

 zone number on server

 */

 /** @typedef typedef enum __ns_type ns_type

 Currently defined type values for resources and queries.

 @publishedAll

 @released

 */

 /** @typedef typedef enum __ns_class ns_class

 Values for class field

 @publishedAll

 @released

 */