Method HandleDatagram2

libi2pd/Datagram.cpp:196–284

	}

	void DatagramDestination::HandleDatagram2 (uint16_t fromPort, uint16_t toPort, const uint8_t * buf, size_t len,
		i2p::garlic::ECIESX25519AEADRatchetSession * from)
	{
		if (len < 433)
		{
			LogPrint (eLogWarning, "Datagram: datagram2 is too short ", len);
			return;
		}
		i2p::data::IdentityEx identity;
		size_t identityLen = identity.FromBuffer (buf, len);
		if (!identityLen) return;
		size_t signatureLen = identity.GetSignatureLen ();
		if (signatureLen + identityLen > len) return;

		std::shared_ptr<i2p::data::LeaseSet> ls;
		bool verified = false;
		if (from)
		{
			ls = m_Owner->FindLeaseSet (identity.GetIdentHash ());
			if (ls)
			{
				uint8_t staticKey[32];
				ls->Encrypt (nullptr, staticKey);
				if (!memcmp (from->GetRemoteStaticKey (), staticKey, 32))
					verified = true;
				else
				{
					LogPrint (eLogError, "Datagram: Remote LeaseSet static key mismatch for datagram2 from ",
						identity.GetIdentHash ().ToBase32 ());
					return;
				}
			}
		}
		const uint8_t * flags = buf + identityLen;
		size_t offset = identityLen + 2;
		bool isOptions = false;
		if (flags[1] & DATAGRAM2_FLAG_OPTIONS)
		{
			isOptions = true;
			m_Options.CleanUp ();
			auto optionsLen = m_Options.FromBuffer (buf + offset, len - offset);
			if (optionsLen)
				offset += optionsLen;
			else
			{
				LogPrint (eLogWarning, "Datagram: datagram2 can't read options");
				return;
			}
		}
		if (offset > len)
		{
			LogPrint (eLogWarning, "Datagram: datagram2 is too short ", len, " expected ", offset);
			return;
		}
		if (!verified)
		{
			std::shared_ptr<i2p::crypto::Verifier> transientVerifier;
			if (flags[1] & DATAGRAM2_FLAG_OFFLINE_SIGNATURE)