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handle NTCP2 I2NP messages

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orignal 2018-07-17 15:17:05 -04:00
parent 5575b981c8
commit 8c5111e11a
3 changed files with 64 additions and 1 deletions
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20
libi2pd/I2NPProtocol.h
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@ -26,6 +26,9 @@ namespace i2p
const size_t I2NP_SHORT_HEADER_EXPIRATION_OFFSET = I2NP_SHORT_HEADER_TYPEID_OFFSET + 1;
const size_t I2NP_SHORT_HEADER_SIZE = I2NP_SHORT_HEADER_EXPIRATION_OFFSET + 4;
// I2NP NTCP2 header
const size_t I2NP_NTCP2_HEADER_SIZE = I2NP_HEADER_EXPIRATION_OFFSET + 4;
// Tunnel Gateway header
const size_t TUNNEL_GATEWAY_HEADER_TUNNELID_OFFSET = 0;
const size_t TUNNEL_GATEWAY_HEADER_LENGTH_OFFSET = TUNNEL_GATEWAY_HEADER_TUNNELID_OFFSET + 4;
@ -194,6 +197,23 @@ namespace tunnel
len = offset + I2NP_SHORT_HEADER_SIZE + bufbe16toh (header + I2NP_HEADER_SIZE_OFFSET);
return bufbe32toh (header + I2NP_HEADER_MSGID_OFFSET);
}
// for NTCP2 only
uint8_t * GetNTCP2Header () { return GetPayload () - I2NP_NTCP2_HEADER_SIZE; };
void FromNTCP2 ()
{
const uint8_t * ntcp2 = GetNTCP2Header ();
memcpy (GetHeader () + I2NP_HEADER_TYPEID_OFFSET, ntcp2 + I2NP_HEADER_TYPEID_OFFSET, 5); // typeid + msgid
SetExpiration (bufbe32toh (ntcp2 + I2NP_HEADER_EXPIRATION_OFFSET)*1000LL);
SetSize (len - offset - I2NP_HEADER_SIZE);
SetChks (0);
}
void ToNTCP2 ()
{
uint8_t * ntcp2 = GetNTCP2Header ();
htobe32buf (ntcp2 + I2NP_HEADER_EXPIRATION_OFFSET, bufbe64toh (GetHeader () + I2NP_HEADER_EXPIRATION_OFFSET)/1000LL);
memcpy (ntcp2 + I2NP_HEADER_TYPEID_OFFSET, GetHeader () + I2NP_HEADER_TYPEID_OFFSET, 5); // typeid + msgid
}
void FillI2NPMessageHeader (I2NPMessageType msgType, uint32_t replyMsgID = 0);
void RenewI2NPMessageHeader ();