dns.h

Go to the documentation of this file.

/*
 *  Copyright (c) 2017, The OpenThread Authors.
 *  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. Neither the name of the copyright holder 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
 */

#ifndef OPENTHREAD_DNS_H_
#define OPENTHREAD_DNS_H_

#include <openthread/message.h>
#include <openthread/types.h>

#ifdef __cplusplus
extern "C" {
#endif

#define OT_DNS_MAX_HOSTNAME_LENGTH 62  

#define OT_DNS_DEFAULT_DNS_SERVER_IP  "2001:4860:4860::8888" 
#define OT_DNS_DEFAULT_DNS_SERVER_PORT 53                    


typedef struct otDnsQuery
{
    const char          *mHostname;     
    const otMessageInfo *mMessageInfo;  
    bool                 mNoRecursion;  
} otDnsQuery;

typedef void (*otDnsResponseHandler)(void *aContext, const char *aHostname, otIp6Address *aAddress,
                                     uint32_t aTtl, otError aResult);

otError otDnsClientQuery(otInstance *aInstance, const otDnsQuery *aQuery, otDnsResponseHandler aHandler,
                         void *aContext);

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // OPENTHREAD_DNS_H_