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check target destination

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orignal 2023-03-11 08:44:07 -05:00
parent 98f06e3ba1
commit 6f01ebc0a5
2 changed files with 25 additions and 4 deletions
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22
libi2pd/Streaming.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2022, The PurpleI2P Project
* Copyright (c) 2013-2023, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@ -139,7 +139,16 @@ namespace stream
{
m_NumReceivedBytes += packet->GetLength ();
if (!m_SendStreamID)
{
m_SendStreamID = packet->GetReceiveStreamID ();
if (!m_RemoteIdentity && packet->GetNACKCount () == 8 && // first incoming packet
memcmp (packet->GetNACKs (), m_LocalDestination.GetOwner ()->GetIdentHash (), 32))
{
LogPrint (eLogWarning, "Streaming: Destination mismatch for ", m_LocalDestination.GetOwner ()->GetIdentHash ().ToBase32 ());
m_LocalDestination.DeletePacket (packet);
return;
}
}
if (!packet->IsNoAck ()) // ack received
ProcessAck (packet);
@ -560,8 +569,19 @@ namespace stream
else
htobe32buf (packet + size, m_LastReceivedSequenceNumber);
size += 4; // ack Through
if (m_Status == eStreamStatusNew && !m_SendStreamID && m_RemoteIdentity)
{
// first SYN packet
packet[size] = 8;
size++; // NACK count
memcpy (packet + size, m_RemoteIdentity->GetIdentHash (), 32);
size += 32;
}
else
{
packet[size] = 0;
size++; // NACK count
}
packet[size] = m_RTO/1000;
size++; // resend delay
if (m_Status == eStreamStatusNew)

3
libi2pd/Streaming.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2022, The PurpleI2P Project
* Copyright (c) 2013-2023, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@ -80,6 +80,7 @@ namespace stream
uint32_t GetAckThrough () const { return bufbe32toh (buf + 12); };
uint8_t GetNACKCount () const { return buf[16]; };
uint32_t GetNACK (int i) const { return bufbe32toh (buf + 17 + 4 * i); };
const uint8_t * GetNACKs () const { return buf + 17; };
const uint8_t * GetOption () const { return buf + 17 + GetNACKCount ()*4 + 3; }; // 3 = resendDelay + flags
uint16_t GetFlags () const { return bufbe16toh (GetOption () - 2); };
uint16_t GetOptionSize () const { return bufbe16toh (GetOption ()); };