nameser.h

MIPS处理器的bootloader,龙芯就是用的修改过的PMON2

 * Values for class field
 */

#define C_IN		1		/* the arpa internet */
#define C_CHAOS		3		/* for chaos net (MIT) */
#define C_HS		4		/* for Hesiod name server (MIT) (XXX) */
	/* Query class values which do not appear in resource records */
#define C_ANY		255		/* wildcard match */

/*
 * Flags field of the KEY RR rdata
 */
#define	KEYFLAG_TYPEMASK	0xC000	/* Mask for "type" bits */
#define	KEYFLAG_TYPE_AUTH_CONF	0x0000	/* Key usable for both */
#define	KEYFLAG_TYPE_CONF_ONLY	0x8000	/* Key usable for confidentiality */
#define	KEYFLAG_TYPE_AUTH_ONLY	0x4000	/* Key usable for authentication */
#define	KEYFLAG_TYPE_NO_KEY	0xC000	/* No key usable for either; no key */
/* The type bits can also be interpreted independently, as single bits: */
#define	KEYFLAG_NO_AUTH		0x8000	/* Key not usable for authentication */
#define	KEYFLAG_NO_CONF		0x4000	/* Key not usable for confidentiality */

#define	KEYFLAG_EXPERIMENTAL	0x2000	/* Security is *mandatory* if bit=0 */
#define	KEYFLAG_RESERVED3	0x1000  /* reserved - must be zero */
#define	KEYFLAG_RESERVED4	0x0800  /* reserved - must be zero */
#define	KEYFLAG_USERACCOUNT	0x0400	/* key is assoc. with a user acct */
#define	KEYFLAG_ENTITY		0x0200	/* key is assoc. with entity eg host */
#define	KEYFLAG_ZONEKEY		0x0100	/* key is zone key for the zone named */
#define	KEYFLAG_IPSEC		0x0080  /* key is for IPSEC use (host or user)*/
#define	KEYFLAG_EMAIL		0x0040  /* key is for email (MIME security) */
#define	KEYFLAG_RESERVED10	0x0020  /* reserved - must be zero */
#define	KEYFLAG_RESERVED11	0x0010  /* reserved - must be zero */
#define	KEYFLAG_SIGNATORYMASK	0x000F	/* key can sign DNS RR's of same name */

#define  KEYFLAG_RESERVED_BITMASK ( KEYFLAG_RESERVED3 | \
				    KEYFLAG_RESERVED4 | \
				    KEYFLAG_RESERVED10| KEYFLAG_RESERVED11) 

/* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
#define	ALGORITHM_MD5RSA	1	/* MD5 with RSA */
#define	ALGORITHM_EXPIRE_ONLY	253	/* No alg, no security */
#define	ALGORITHM_PRIVATE_OID	254	/* Key begins with OID indicating alg */

/* Signatures */
					/* Size of a mod or exp in bits */
#define	MIN_MD5RSA_KEY_PART_BITS	 512
#define	MAX_MD5RSA_KEY_PART_BITS	2552
					/* Total of binary mod and exp, bytes */
#define	MAX_MD5RSA_KEY_BYTES		((MAX_MD5RSA_KEY_PART_BITS+7/8)*2+3)
					/* Max length of text sig block */
#define	MAX_KEY_BASE64			(((MAX_MD5RSA_KEY_BYTES+2)/3)*4)

/*
 * Status return codes for T_UNSPEC conversion routines
 */
#define CONV_SUCCESS	0
#define CONV_OVERFLOW	(-1)
#define CONV_BADFMT	(-2)
#define CONV_BADCKSUM	(-3)
#define CONV_BADBUFLEN	(-4)

#ifndef BYTE_ORDER
#if (BSD >= 199103)
# include <machine/endian.h>
#else
#ifdef linux
# include <endian.h>
#else
#define LITTLE_ENDIAN	1234	/* least-significant byte first (vax, pc) */
#define BIG_ENDIAN	4321	/* most-significant byte first (IBM, net) */
#define PDP_ENDIAN	3412	/* LSB first in word, MSW first in long (pdp)*/

#if defined(vax) || defined(ns32000) || defined(sun386) || defined(i386) || \
    defined(MIPSEL) || defined(_MIPSEL) || defined(BIT_ZERO_ON_RIGHT) || \
    defined(__alpha__) || defined(__alpha)
#define BYTE_ORDER	LITTLE_ENDIAN
#endif

#if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) || \
    defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) || \
    defined(MIPSEB) || defined(_MIPSEB) || defined(_IBMR2) || defined(DGUX) ||\
    defined(apollo) || defined(__convex__) || defined(_CRAY) || \
    defined(__hppa) || defined(__hp9000) || \
    defined(__hp9000s300) || defined(__hp9000s700) || \
    defined (BIT_ZERO_ON_LEFT) || defined(m68k)
#define BYTE_ORDER	BIG_ENDIAN
#endif
#endif /* linux */
#endif /* BSD */
#endif /* BYTE_ORDER */

#if !defined(BYTE_ORDER) || \
    (BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN && \
    BYTE_ORDER != PDP_ENDIAN)
	/* you must determine what the correct bit order is for
	 * your compiler - the next line is an intentional error
	 * which will force your compiles to bomb until you fix
	 * the above macros.
	 */
  error "Undefined or invalid BYTE_ORDER";
#endif

/*
 * Structure for query header.  The order of the fields is machine- and
 * compiler-dependent, depending on the byte/bit order and the layout
 * of bit fields.  We use bit fields only in int variables, as this
 * is all ANSI requires.  This requires a somewhat confusing rearrangement.
 */

typedef struct {
	unsigned	id :16;		/* query identification number */
#if BYTE_ORDER == BIG_ENDIAN
			/* fields in third byte */
	unsigned	qr: 1;		/* response flag */
	unsigned	opcode: 4;	/* purpose of message */
	unsigned	aa: 1;		/* authoritive answer */
	unsigned	tc: 1;		/* truncated message */
	unsigned	rd: 1;		/* recursion desired */
			/* fields in fourth byte */
	unsigned	ra: 1;		/* recursion available */
	unsigned	unused :1;	/* unused bits (MBZ as of 4.9.3a3) */
	unsigned	ad: 1;		/* authentic data from named */
	unsigned	cd: 1;		/* checking disabled by resolver */
	unsigned	rcode :4;	/* response code */
#endif
#if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN
			/* fields in third byte */
	unsigned	rd :1;		/* recursion desired */
	unsigned	tc :1;		/* truncated message */
	unsigned	aa :1;		/* authoritive answer */
	unsigned	opcode :4;	/* purpose of message */
	unsigned	qr :1;		/* response flag */
			/* fields in fourth byte */
	unsigned	rcode :4;	/* response code */
	unsigned	cd: 1;		/* checking disabled by resolver */
	unsigned	ad: 1;		/* authentic data from named */
	unsigned	unused :1;	/* unused bits (MBZ as of 4.9.3a3) */
	unsigned	ra :1;		/* recursion available */
#endif
			/* remaining bytes */
	unsigned	qdcount :16;	/* number of question entries */
	unsigned	ancount :16;	/* number of answer entries */
	unsigned	nscount :16;	/* number of authority entries */
	unsigned	arcount :16;	/* number of resource entries */
} HEADER;

/*
 * Defines for handling compressed domain names
 */
#define INDIR_MASK	0xc0

extern	u_int16_t	_getshort __P((const u_char *));
extern	u_int32_t	_getlong __P((const u_char *));

/*
 * Inline versions of get/put short/long.  Pointer is advanced.
 *
 * These macros demonstrate the property of C whereby it can be
 * portable or it can be elegant but rarely both.
 */
#define GETSHORT(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) += INT16SZ; \
}

#define GETLONG(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) += INT32SZ; \
}

#define PUTSHORT(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) += INT16SZ; \
}

#define PUTLONG(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) += INT32SZ; \
}

#endif /* !_NAMESER_H_ */