nameser.h
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上传日期:2008-05-12
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文件大小:9k
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VxWorks
开发平台:
C/C++
- /* nameser.h - Domain Name Server protocol header file */
- /* Copyright 1984-1996 Wind River Systems, Inc. */
- /* $NetBSD: nameser.h,v 1.7 1994/10/26 00:56:45 cgd Exp $ */
- /*
- * Copyright (c) 1983, 1989 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)nameser.h 5.25 (Berkeley) 4/3/91
- */
- /*
- modification history
- --------------------
- 01b,29apr97,jag Changed T_NULL to T_NULL_RR to fix conflict with loadCoffLib.h
- 01b,02apr97,jag Change types from u_int*_t to uint*_t.
- 01a,11dec96,jag created from BSD4.4. Corrected bitfields to meet ANSI spec.
- changed STATUS to DNS_STATUS.
- */
- #ifndef __INCnameserh
- #define __INCnameserh
- #ifdef __cplusplus
- extern "C" {
- #endif
- #define BYTE_ORDER _BYTE_ORDER
- #define LITTLE_ENDIAN _LITTLE_ENDIAN
- #define BIG_ENDIAN _BIG_ENDIAN
- /*
- * Define constants based on rfc883
- */
- #define PACKETSZ 512 /* maximum packet size */
- #define MAXDNAME 256 /* maximum domain name */
- #define MAXCDNAME 255 /* maximum compressed domain name */
- #define MAXLABEL 63 /* maximum length of domain label */
- /* Number of bytes of fixed size data in query structure */
- #define QFIXEDSZ 4
- /* number of bytes of fixed size data in resource record */
- #define RRFIXEDSZ 10
- /*
- * Internet nameserver port number
- */
- #define NAMESERVER_PORT 53
- /*
- * Currently defined opcodes
- */
- #define QUERY 0x0 /* standard query */
- #define IQUERY 0x1 /* inverse query */
- #define DNS_STATUS 0x2 /* nameserver status query*/
- /* #define xxx 0x3 0x3 reserved */
- /* non standard */
- #define UPDATEA 0x9 /* add resource record */
- #define UPDATED 0xa /* delete a specific resource record */
- #define UPDATEDA 0xb /* delete all named resource record */
- #define UPDATEM 0xc /* modify a specific resource record */
- #define UPDATEMA 0xd /* modify all named resource record */
- #define ZONEINIT 0xe /* initial zone transfer */
- #define ZONEREF 0xf /* incremental zone referesh */
- /*
- * Currently defined response codes
- */
- #define NOERROR 0 /* no error */
- #define FORMERR 1 /* format error */
- #define SERVFAIL 2 /* server failure */
- #define NXDOMAIN 3 /* non existent domain */
- #define NOTIMP 4 /* not implemented */
- #define REFUSED 5 /* query refused */
- /* non standard */
- #define NOCHANGE 0xf /* update failed to change db */
- /*
- * Type values for resources and queries
- */
- #define T_A 1 /* host address */
- #define T_NS 2 /* authoritative server */
- #define T_MD 3 /* mail destination */
- #define T_MF 4 /* mail forwarder */
- #define T_CNAME 5 /* connonical name */
- #define T_SOA 6 /* start of authority zone */
- #define T_MB 7 /* mailbox domain name */
- #define T_MG 8 /* mail group member */
- #define T_MR 9 /* mail rename name */
- #define T_NULL_RR 10 /* null resource record */
- #define T_WKS 11 /* well known service */
- #define T_PTR 12 /* domain name pointer */
- #define T_HINFO 13 /* host information */
- #define T_MINFO 14 /* mailbox information */
- #define T_MX 15 /* mail routing information */
- #define T_TXT 16 /* text strings */
- #define T_RP 17 /* responsible person */
- #define T_AFSDB 18 /* AFS cell database */
- #define T_NSAP 22 /* NSAP address */
- #define T_NSAP_PTR 23 /* reverse lookup for NSAP */
- /* non standard */
- #define T_UINFO 100 /* user (finger) information */
- #define T_UID 101 /* user ID */
- #define T_GID 102 /* group ID */
- #define T_UNSPEC 103 /* Unspecified format (binary data) */
- #define T_SA 200 /* shuffle address */
- /* Query type values which do not appear in resource records */
- #define T_AXFR 252 /* transfer zone of authority */
- #define T_MAILB 253 /* transfer mailbox records */
- #define T_MAILA 254 /* transfer mail agent records */
- #define T_ANY 255 /* wildcard match */
- /*
- * Values for class field
- */
- #define C_IN 1 /* the arpa internet */
- #define C_CHAOS 3 /* for chaos net at MIT */
- #define C_HS 4 /* for Hesiod name server at MIT */
- /* Query class values which do not appear in resource records */
- #define C_ANY 255 /* wildcard match */
- /*
- * 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
- /*
- * Structure for query header, the order of the fields is machine and
- * compiler dependent, in our case, the bits within a byte are assignd
- * least significant first, while the order of transmition is most
- * significant first. This requires a somewhat confusing rearrangement.
- */
- #if ((CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 1 /* tell gcc960 not to optimize alignments */
- #endif /* CPU_FAMILY==I960 */
- typedef struct
- {
- u_int id:16, /* fields (Bytes 1-2) query identification number */
- #if BYTE_ORDER == BIG_ENDIAN
- /* fields in third byte */
- qr:1, /* response flag */
- opcode:4, /* purpose of message */
- aa:1, /* authoritive answer */
- tc:1, /* truncated message */
- rd:1, /* recursion desired */
- /* fields in fourth byte */
- ra:1, /* recursion available */
- pr:1, /* primary server required (non standard) */
- unused:2, /* unused bits */
- rcode:4; /* response code */
- #endif
- #if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN
- /* fields in third byte */
- rd:1, /* recursion desired */
- tc:1, /* truncated message */
- aa:1, /* authoritive answer */
- opcode:4, /* purpose of message */
- qr:1, /* response flag */
- /* fields in fourth byte */
- rcode:4, /* response code */
- unused:2, /* unused bits */
- pr:1, /* primary server required (non standard) */
- ra:1; /* recursion available */
- #endif
- /* remaining bytes */
- u_short qdcount; /* number of question entries */
- u_short ancount; /* number of answer entries */
- u_short nscount; /* number of authority entries */
- u_short arcount; /* number of resource entries */
- } HEADER;
- /*
- * Defines for handling compressed domain names
- */
- #define INDIR_MASK 0xc0
- /*
- * Structure for passing resource records around.
- */
- struct rrec {
- int16_t r_zone; /* zone number */
- int16_t r_class; /* class number */
- int16_t r_type; /* type number */
- uint32_t r_ttl; /* time to live */
- int r_size; /* size of data area */
- char *r_data; /* pointer to data */
- };
- #if ((CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 0 /* turn off alignment requirement */
- #endif /* CPU_FAMILY==I960 */
- extern uint16_t _getshort();
- extern uint32_t _getlong();
- /*
- * Inline versions of get/put short/long.
- * Pointer is advanced; we assume that both arguments
- * are lvalues and will already be in registers.
- * cp MUST be u_char *.
- */
- #define GETSHORT(s, cp) {
- register u_char *t_cp = (u_char *)(cp);
- (s) = ((uint16_t)t_cp[0] << 8)
- | ((uint16_t)t_cp[1]) ;
- (cp) += sizeof(uint16_t);
- }
- #define GETLONG(l, cp) {
- register u_char *t_cp = (u_char *)(cp);
- (l) = ((uint32_t)t_cp[0] << 24)
- | ((uint32_t)t_cp[1] << 16)
- | ((uint32_t)t_cp[2] << 8)
- | ((uint32_t)t_cp[3]) ;
- (cp) += sizeof(uint32_t);
- }
- #define PUTSHORT(s, cp) {
- register uint16_t t_s = (uint16_t)(s);
- register u_char *t_cp = (u_char *)(cp);
- *t_cp++ = t_s >> 8;
- *t_cp = t_s;
- (cp) += sizeof(uint16_t);
- }
- /*
- * Warning: PUTLONG --no-longer-- destroys its first argument. if you
- * were depending on this "feature", you will lose.
- */
- #define PUTLONG(l, cp) {
- register uint32_t t_l = (uint32_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) += sizeof(uint32_t);
- }
- #ifdef __cplusplus
- }
- #endif
- #endif /* __INCnameserh */