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destination delivery instructions

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orignal 2020-01-30 11:48:32 -05:00
parent 8c800dc178
commit 239c8b5172
3 changed files with 30 additions and 15 deletions
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31
libi2pd/ECIESX25519AEADRatchetSession.cpp
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@ -370,8 +370,8 @@ namespace garlic
std::vector<uint8_t> ECIESX25519AEADRatchetSession::CreatePayload (std::shared_ptr<const I2NPMessage> msg)
{
size_t payloadLen = 7; // datatime
if (msg)
payloadLen += msg->GetPayloadLength () + 13;
if (msg && m_Destination)
payloadLen += msg->GetPayloadLength () + 13 + 32;
auto leaseSet = CreateDatabaseStoreMsg (GetOwner ()->GetLeaseSet ());
if (leaseSet)
payloadLen += leaseSet->GetPayloadLength () + 13;
@ -389,8 +389,8 @@ namespace garlic
if (leaseSet)
offset += CreateGarlicClove (leaseSet, v.data () + offset, payloadLen - offset);
// msg
if (msg)
offset += CreateGarlicClove (msg, v.data () + offset, payloadLen - offset);
if (msg && m_Destination)
offset += CreateGarlicClove (msg, v.data () + offset, payloadLen - offset, true);
// padding
v[offset] = eECIESx25519BlkPadding; offset++;
htobe16buf (v.data () + offset, paddingSize); offset += 2;
@ -398,18 +398,27 @@ namespace garlic
return v;
}
size_t ECIESX25519AEADRatchetSession::CreateGarlicClove (std::shared_ptr<const I2NPMessage> msg, uint8_t * buf, size_t len)
size_t ECIESX25519AEADRatchetSession::CreateGarlicClove (std::shared_ptr<const I2NPMessage> msg, uint8_t * buf, size_t len, bool isDestination)
{
if (!msg) return 0;
uint16_t cloveSize = msg->GetPayloadLength () + 9 + 1;
if (isDestination) cloveSize += 32;
if ((int)len < cloveSize + 3) return 0;
buf[0] = eECIESx25519BlkGalicClove; // clove type
htobe16buf (buf + 1, cloveSize); // size
buf[3] = 0; // flag and delivery instructions
buf[4] = msg->GetTypeID (); // I2NP msg type
htobe32buf (buf + 5, msg->GetMsgID ()); // msgID
htobe32buf (buf + 9, msg->GetExpiration ()/1000); // expiration in seconds
memcpy (buf + 13, msg->GetPayload (), msg->GetPayloadLength ());
htobe16buf (buf + 1, cloveSize); // size
buf += 3;
if (isDestination)
{
*buf = (eGarlicDeliveryTypeDestination << 5);
memcpy (buf + 1, *m_Destination, 32); buf += 32;
}
else
*buf = 0;
buf++; // flag and delivery instructions
*buf = msg->GetTypeID (); // I2NP msg type
htobe32buf (buf + 1, msg->GetMsgID ()); // msgID
htobe32buf (buf + 5, msg->GetExpiration ()/1000); // expiration in seconds
memcpy (buf + 9, msg->GetPayload (), msg->GetPayloadLength ());
return cloveSize + 3;
}