Method GenerateNonceKey

cpp/src/Node.cpp:3766–3800

----------------------------------------------------------------------------- Generate a NONCE key for this node -----------------------------------------------------------------------------

// Generate a NONCE key for this node
//-----------------------------------------------------------------------------
uint8 *Node::GenerateNonceKey() {
	uint8 idx = this->m_lastnonce;

	/* The first byte must be unique and non-zero.  The others are random.
	   Per Numerical Recipes in C its best to use the high-order byte.  The
	   floating point calculation here doesn't assume the size of the random
	   integer, otherwise we could just shift the high byte over.
	*/
	uint8 match = 0;
	do {
		this->m_nonces[idx][0] = 1 + (uint8) (255.0 * rand() / (RAND_MAX + 1.0));
		match = 0;
		for (int i = 0; i < 8; i++) {
			if (i == idx) {
				continue;
			}
			if (this->m_nonces[idx][0] == this->m_nonces[i][0]) {
				match = 1;
			}
		}
	} while (match);

	/* The other bytes have no restrictions. */
	for (int i = 1; i < 8; i++) {
		this->m_nonces[idx][i] = (int) (256.0 * rand() / (RAND_MAX + 1.0));
	}

	this->m_lastnonce++;
	if (this->m_lastnonce >= 8)
		this->m_lastnonce = 0;
	for (uint8 i = 0; i < 8; i++) {
		PrintHex("NONCES", (const uint8_t*)this->m_nonces[i], 8);
	}
	return &this->m_nonces[idx][0];
}
//-----------------------------------------------------------------------------
// <Node::GetNonceKey>
// Get a NONCE key for this node that matches the nonceid.