nameser.h

a kind of RTOS souce code for ARM

	u_char *	r_data;		/* rdata fields as text string */
	u_int16_t	r_size;		/* size of r_data field */
	int		r_opcode;	/* type of operation */
	/* following fields for private use by the resolver/server routines */
	struct ns_updrec *r_grpnext;	/* next record when grouped */
	struct databuf *r_dp;		/* databuf to process */
	struct databuf *r_deldp;	/* databuf's deleted/overwritten */
	u_int16_t	r_zone;		/* zone number on server */
};
typedef struct ns_updrec ns_updrec;

/*
 * Currently defined type values for resources and queries.
 */
typedef enum __ns_type {
	ns_t_a = 1,		/* Host address. */
	ns_t_ns = 2,		/* Authoritative server. */
	ns_t_md = 3,		/* Mail destination. */
	ns_t_mf = 4,		/* Mail forwarder. */
	ns_t_cname = 5,		/* Canonical name. */
	ns_t_soa = 6,		/* Start of authority zone. */
	ns_t_mb = 7,		/* Mailbox domain name. */
	ns_t_mg = 8,		/* Mail group member. */
	ns_t_mr = 9,		/* Mail rename name. */
	ns_t_null = 10,		/* Null resource record. */
	ns_t_wks = 11,		/* Well known service. */
	ns_t_ptr = 12,		/* Domain name pointer. */
	ns_t_hinfo = 13,	/* Host information. */
	ns_t_minfo = 14,	/* Mailbox information. */
	ns_t_mx = 15,		/* Mail routing information. */
	ns_t_txt = 16,		/* Text strings. */
	ns_t_rp = 17,		/* Responsible person. */
	ns_t_afsdb = 18,	/* AFS cell database. */
	ns_t_x25 = 19,		/* X_25 calling address. */
	ns_t_isdn = 20,		/* ISDN calling address. */
	ns_t_rt = 21,		/* Router. */
	ns_t_nsap = 22,		/* NSAP address. */
	ns_t_nsap_ptr = 23,	/* Reverse NSAP lookup (deprecated). */
	ns_t_sig = 24,		/* Security signature. */
	ns_t_key = 25,		/* Security key. */
	ns_t_px = 26,		/* X.400 mail mapping. */
	ns_t_gpos = 27,		/* Geographical position (withdrawn). */
	ns_t_aaaa = 28,		/* Ip6 Address. */
	ns_t_loc = 29,		/* Location Information. */
	ns_t_nxt = 30,		/* Next domain (security). */
	ns_t_eid = 31,		/* Endpoint identifier. */
	ns_t_nimloc = 32,	/* Nimrod Locator. */
	ns_t_srv = 33,		/* Server Selection. */
	ns_t_atma = 34,		/* ATM Address */
	ns_t_naptr = 35,	/* Naming Authority PoinTeR */
	/* Query type values which do not appear in resource records. */
	ns_t_ixfr = 251,	/* Incremental zone transfer. */
	ns_t_axfr = 252,	/* Transfer zone of authority. */
	ns_t_mailb = 253,	/* Transfer mailbox records. */
	ns_t_maila = 254,	/* Transfer mail agent records. */
	ns_t_any = 255,		/* Wildcard match. */
	ns_t_max = 65536
} ns_type;

/*
 * Values for class field
 */
typedef enum __ns_class {
	ns_c_in = 1,		/* Internet. */
				/* Class 2 unallocated/unsupported. */
	ns_c_chaos = 3,		/* MIT Chaos-net. */
	ns_c_hs = 4,		/* MIT Hesiod. */
	/* Query class values which do not appear in resource records */
	ns_c_none = 254,	/* for prereq. sections in update requests */
	ns_c_any = 255,		/* Wildcard match. */
	ns_c_max = 65536
} ns_class;

/*
 * Flags field of the KEY RR rdata
 */
#define	NS_KEY_TYPEMASK		0xC000	/* Mask for "type" bits */
#define	NS_KEY_TYPE_AUTH_CONF	0x0000	/* Key usable for both */
#define	NS_KEY_TYPE_CONF_ONLY	0x8000	/* Key usable for confidentiality */
#define	NS_KEY_TYPE_AUTH_ONLY	0x4000	/* Key usable for authentication */
#define	NS_KEY_TYPE_NO_KEY	0xC000	/* No key usable for either; no key */
/* The type bits can also be interpreted independently, as single bits: */
#define	NS_KEY_NO_AUTH		0x8000	/* Key unusable for authentication */
#define	NS_KEY_NO_CONF		0x4000	/* Key unusable for confidentiality */
#define	NS_KEY_EXPERIMENTAL	0x2000	/* Security is *mandatory* if bit=0 */
#define	NS_KEY_RESERVED3	0x1000  /* reserved - must be zero */
#define	NS_KEY_RESERVED4	0x0800  /* reserved - must be zero */
#define	NS_KEY_USERACCOUNT	0x0400	/* key is assoc. with a user acct */
#define	NS_KEY_ENTITY		0x0200	/* key is assoc. with entity eg host */
#define	NS_KEY_ZONEKEY		0x0100	/* key is zone key */
#define	NS_KEY_IPSEC		0x0080  /* key is for IPSEC (host or user)*/
#define	NS_KEY_EMAIL		0x0040  /* key is for email (MIME security) */
#define	NS_KEY_RESERVED10	0x0020  /* reserved - must be zero */
#define	NS_KEY_RESERVED11	0x0010  /* reserved - must be zero */
#define	NS_KEY_SIGNATORYMASK	0x000F	/* key can sign RR's of same name */

#define	NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED3 | \
				  NS_KEY_RESERVED4 | \
				  NS_KEY_RESERVED10 | \
				  NS_KEY_RESERVED11 )

/* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
#define	NS_ALG_MD5RSA		1	/* MD5 with RSA */
#define	NS_ALG_EXPIRE_ONLY	253	/* No alg, no security */
#define	NS_ALG_PRIVATE_OID	254	/* Key begins with OID giving alg */

/* Signatures */
#define	NS_MD5RSA_MIN_BITS	 512	/* Size of a mod or exp in bits */
#define	NS_MD5RSA_MAX_BITS	2552
	/* Total of binary mod and exp */
#define	NS_MD5RSA_MAX_BYTES	((NS_MD5RSA_MAX_BITS+7/8)*2+3)
	/* Max length of text sig block */
#define	NS_MD5RSA_MAX_BASE64	(((NS_MD5RSA_MAX_BYTES+2)/3)*4)

/* Offsets into SIG record rdata to find various values */
#define	NS_SIG_TYPE	0	/* Type flags */
#define	NS_SIG_ALG	2	/* Algorithm */
#define	NS_SIG_LABELS	3	/* How many labels in name */
#define	NS_SIG_OTTL	4	/* Original TTL */
#define	NS_SIG_EXPIR	8	/* Expiration time */
#define	NS_SIG_SIGNED	12	/* Signature time */
#define	NS_SIG_FOOT	16	/* Key footprint */
#define	NS_SIG_SIGNER	18	/* Domain name of who signed it */

/* How RR types are represented as bit-flags in NXT records */
#define	NS_NXT_BITS 8
#define	NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
#define	NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
#define	NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))


/*
 * Inline versions of get/put short/long.  Pointer is advanced.
 */
#define NS_GET16(s, cp) { \
	register u_char *t_cp = (u_char *)(cp); \
	(s) = ((u_int16_t)t_cp[0] << 8) \
	    | ((u_int16_t)t_cp[1]) \
	    ; \
	(cp) += NS_INT16SZ; \
}

#define NS_GET32(l, cp) { \
	register u_char *t_cp = (u_char *)(cp); \
	(l) = ((u_int32_t)t_cp[0] << 24) \
	    | ((u_int32_t)t_cp[1] << 16) \
	    | ((u_int32_t)t_cp[2] << 8) \
	    | ((u_int32_t)t_cp[3]) \
	    ; \
	(cp) += NS_INT32SZ; \
}

#define NS_PUT16(s, cp) { \
	register u_int16_t t_s = (u_int16_t)(s); \
	register u_char *t_cp = (u_char *)(cp); \
	*t_cp++ = t_s >> 8; \
	*t_cp   = t_s; \
	(cp) += NS_INT16SZ; \
}

#define NS_PUT32(l, cp) { \
	register u_int32_t t_l = (u_int32_t)(l); \
	register u_char *t_cp = (u_char *)(cp); \
	*t_cp++ = t_l >> 24; \
	*t_cp++ = t_l >> 16; \
	*t_cp++ = t_l >> 8; \
	*t_cp   = t_l; \
	(cp) += NS_INT32SZ; \
}

/*
 * ANSI C identifier hiding.
 */
#define ns_get16		__ns_get16
#define ns_get32		__ns_get32
#define ns_put16		__ns_put16
#define ns_put32		__ns_put32
#define ns_initparse		__ns_initparse
#define ns_parserr		__ns_parserr
#define	ns_sprintrr		__ns_sprintrr
#define	ns_sprintrrf		__ns_sprintrrf
#define	ns_format_ttl		__ns_format_ttl
#define	ns_parse_ttl		__ns_parse_ttl
#define	ns_name_ntop		__ns_name_ntop
#define	ns_name_pton		__ns_name_pton
#define	ns_name_unpack		__ns_name_unpack
#define	ns_name_pack		__ns_name_pack
#define	ns_name_compress	__ns_name_compress
#define	ns_name_uncompress	__ns_name_uncompress

__BEGIN_DECLS
u_int		ns_get16 __P((const u_char *));
u_long		ns_get32 __P((const u_char *));
void		ns_put16 __P((u_int, u_char *));
void		ns_put32 __P((u_long, u_char *));
int		ns_initparse __P((const u_char *, int, ns_msg *));
int		ns_parserr __P((ns_msg *, ns_sect, int, ns_rr *));
int		ns_sprintrr __P((const ns_msg *, const ns_rr *,
				 const char *, const char *, char *, size_t));
int		ns_sprintrrf __P((const u_char *, size_t, const char *,
				  ns_class, ns_type, u_long, const u_char *,
				  size_t, const char *, const char *,
				  char *, size_t));
int		ns_format_ttl __P((u_long, char *, size_t));
int		ns_parse_ttl __P((const char *, u_long *));
int		ns_name_ntop __P((const u_char *, char *, size_t));
int		ns_name_pton __P((const char *, u_char *, size_t));
int		ns_name_unpack __P((const u_char *, const u_char *,
				    const u_char *, u_char *, size_t));
int		ns_name_pack __P((const u_char *, u_char *, int,
				  const u_char **, const u_char **));
int		ns_name_uncompress __P((const u_char *, const u_char *,
					const u_char *, char *, size_t));
int		ns_name_compress __P((const char *, u_char *, size_t,
				      const u_char **, const u_char **));
int		ns_name_skip __P((const u_char **, const u_char *));
__END_DECLS

#ifdef BIND_4_COMPAT
#include <arpa/nameser_compat.h>
#endif

#endif /* !_ARPA_NAMESER_H_ */