Method ProcessHolePunch

libi2pd/SSU2Session.cpp:1639–1679

	}

	bool SSU2Session::ProcessHolePunch (uint8_t * buf, size_t len)
	{
		// we are Alice
		LogPrint (eLogDebug, "SSU2: HolePunch");
		Header header;
		memcpy (header.buf, buf, 16);
		header.ll[0] ^= CreateHeaderMask (i2p::context.GetSSU2IntroKey (), buf + (len - 24));
		header.ll[1] ^= CreateHeaderMask (i2p::context.GetSSU2IntroKey (), buf + (len - 12));
		if (header.h.type != eSSU2HolePunch)
		{
			LogPrint (eLogWarning, "SSU2: Unexpected message type ", (int)header.h.type, " instead ", (int)eSSU2HolePunch);
			return false;
		}
		if (len < 48)
		{
			LogPrint (eLogWarning, "SSU2: HolePunch message too short ", len);
			return false;
		}
		uint8_t nonce[12] = {0};
		uint64_t headerX[2]; // sourceConnID, token
		m_Server.ChaCha20 (buf + 16, 16, i2p::context.GetSSU2IntroKey (), nonce, (uint8_t *)headerX);
		m_DestConnID = headerX[0];
		// decrypt and handle payload
		uint8_t * payload = buf + 32;
		CreateNonce (be32toh (header.h.packetNum), nonce);
		uint8_t h[32];
		memcpy (h, header.buf, 16);
		memcpy (h + 16, &headerX, 16);
		if (!i2p::crypto::AEADChaCha20Poly1305 (payload, len - 48, h, 32,
			i2p::context.GetSSU2IntroKey (), nonce, payload, len - 48, false))
		{
			LogPrint (eLogWarning, "SSU2: HolePunch AEAD verification failed ");
			return false;
		}
		HandlePayload (payload, len - 48);
		m_IsDataReceived = false;
		// connect to Charlie
		ConnectAfterIntroduction ();

		return true;
	}

	bool SSU2Session::ProcessPeerTest (uint8_t * buf, size_t len)
	{