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datetime, address, ack blocks in path response packet

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orignal 2025-03-31 15:50:16 -04:00
parent ad3b999732
commit 2280338900
1 changed files with 21 additions and 8 deletions

27
libi2pd/SSU2Session.cpp
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@ -3058,18 +3058,31 @@ namespace transport
void SSU2Session::SendPathResponse (const uint8_t * data, size_t len) void SSU2Session::SendPathResponse (const uint8_t * data, size_t len)
{ {
if (len > m_MaxPayloadSize - 3) uint8_t payload[SSU2_MAX_PACKET_SIZE];
size_t payloadSize = 0;
// datetime block
payload[0] = eSSU2BlkDateTime;
htobe16buf (payload + 1, 4);
htobe32buf (payload + 3, (i2p::util::GetMillisecondsSinceEpoch () + 500)/1000);
payloadSize += 7;
// address block
payloadSize += CreateAddressBlock (payload + payloadSize, m_MaxPayloadSize - payloadSize, m_RemoteEndpoint);
// path response
if (payloadSize + len > m_MaxPayloadSize)
{ {
LogPrint (eLogWarning, "SSU2: Incorrect data size for path response ", len); LogPrint (eLogWarning, "SSU2: Incorrect data size for path response ", len);
return; return;
} }
uint8_t payload[SSU2_MAX_PACKET_SIZE]; payload[payloadSize] = eSSU2BlkPathResponse;
payload[0] = eSSU2BlkPathResponse; htobe16buf (payload + payloadSize + 1, len);
htobe16buf (payload + 1, len); memcpy (payload + payloadSize + 3, data, len);
memcpy (payload + 3, data, len); payloadSize += len + 3;
size_t payloadSize = len + 3; // ack block
if (payloadSize < m_MaxPayloadSize) if (payloadSize < m_MaxPayloadSize)
payloadSize += CreatePaddingBlock (payload + payloadSize, m_MaxPayloadSize - payloadSize, payloadSize < 8 ? 8 : 0); payloadSize += CreateAckBlock (payload + payloadSize, m_MaxPayloadSize - payloadSize);
// padding
if (payloadSize < m_MaxPayloadSize)
payloadSize += CreatePaddingBlock (payload + payloadSize, m_MaxPayloadSize - payloadSize);
SendData (payload, payloadSize); SendData (payload, payloadSize);
} }