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#ifndef CYGONCE_NS_DNS_DNS_PRIV_H
#define CYGONCE_NS_DNS_DNS_PRIV_H
//=============================================================================
//
// dns-priv.h
//
// Private DNS client definitions.
//
//=============================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): andrew.lunn
// Contributors:andrew.lunn, jskov
// Date: 2001-09-18
//
//####DESCRIPTIONEND####
//
//=============================================================================
struct dns_header {
#if (CYG_BYTEORDER == CYG_LSBFIRST)
unsigned id :16; /* query identification number */
/* 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 */
unsigned ra :1; /* recursion available */
/* 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 */
#else
unsigned id :16; /* query identification number */
/* 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 */
unsigned ad: 1; /* authentic data from named */
unsigned cd: 1; /* checking disabled by resolver */
unsigned rcode :4; /* response code */
/* 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 */
#endif
};
struct resource_record {
unsigned rr_type : 16; /* Type of resourse */
unsigned class : 16; /* Class of resource */
unsigned ttl : 32; /* Time to live of this record */
unsigned rdlength: 16; /* Lenght of data to follow */
char rdata [2]; /* Resource DATA */
};
/* Opcodes */
#define DNS_QUERY 0 /* Standard query */
#define DNS_IQUERY 1 /* Inverse query */
#define DNS_STATUS 2 /* Name server status */
#define DNS_NOTIFY 4 /* Zone change notification */
#define DNS_UPDATE 5 /* Zone update message */
/* DNS TYPEs */
#define DNS_TYPE_A 1 /* Host address */
#define DNS_TYPE_NS 2 /* Authoritative name server */
#define DNS_TYPE_CNAME 5 /* Canonical name for an alias */
#define DNS_TYPE_PTR 12 /* Domain name pointer */
#define DNS_TYPE_AAAA 28 /* IPv6 host address */
/* DNS CLASSs */
#define DNS_CLASS_IN 1 /* Internet */
/* DNS reply codes */
#define DNS_REPLY_NOERR 0
#define DNS_REPLY_NAME_ERROR 3
#define MAXDNSMSGSIZE 512
//-----------------------------------------------------------------------------
#endif // CYGONCE_NS_DNS_DNS_PRIV_H
// End of dns-priv.h
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