src/core/meshcop/meshcop.cpp

/*
 *  Copyright (c) 2017, The OpenThread Authors.
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 *  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
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 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */

/**
 * @file
 *   This file implements common MeshCoP utility functions.
 */

#include "common/locator-getters.hpp"
#include "crypto/sha256.hpp"
#include "mac/mac_types.hpp"
#include "thread/thread_netif.hpp"

namespace ot {
namespace MeshCoP {

void ComputeJoinerId(const Mac::ExtAddress &aEui64, Mac::ExtAddress &aJoinerId)
{
    Crypto::Sha256 sha256;
    uint8_t        hash[Crypto::Sha256::kHashSize];

    sha256.Start();
    sha256.Update(aEui64.m8, sizeof(aEui64));
    sha256.Finish(hash);

    memcpy(&aJoinerId, hash, sizeof(aJoinerId));
    aJoinerId.SetLocal(true);
}

otError GetBorderAgentRloc(ThreadNetif &aNetif, uint16_t &aRloc)
{
    otError                error = OT_ERROR_NONE;
    BorderAgentLocatorTlv *borderAgentLocator;

    borderAgentLocator = static_cast<BorderAgentLocatorTlv *>(
        aNetif.Get<NetworkData::Leader>().GetCommissioningDataSubTlv(Tlv::kBorderAgentLocator));
    VerifyOrExit(borderAgentLocator != NULL, error = OT_ERROR_NOT_FOUND);

    aRloc = borderAgentLocator->GetBorderAgentLocator();

exit:
    return error;
}

} // namespace MeshCoP
} // namespace ot