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update remote endpoint and send path challenge

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orignal 2022-09-07 19:11:33 -04:00
parent cf27581c76
commit 3bdef5f58d
3 changed files with 25 additions and 4 deletions

22
libi2pd/SSU2Session.cpp
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@ -1301,7 +1301,7 @@ namespace transport
return m_SendPacketNum - 1;
}
void SSU2Session::ProcessData (uint8_t * buf, size_t len)
void SSU2Session::ProcessData (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& from)
{
Header header;
header.ll[0] = m_SourceConnID;
@ -1316,6 +1316,12 @@ namespace transport
ResendHandshakePacket (); // assume we receive
return;
}
if (from != m_RemoteEndpoint)
{
LogPrint (eLogInfo, "SSU2: Remote endpoint update ", m_RemoteEndpoint, "->", from);
m_RemoteEndpoint = from;
SendPathChallenge ();
}
uint8_t payload[SSU2_MAX_PACKET_SIZE];
size_t payloadSize = len - 32;
uint32_t packetNum = be32toh (header.h.packetNum);
@ -2625,6 +2631,20 @@ namespace transport
memcpy (payload + 3, data, len);
SendData (payload, len + 3);
}
void SSU2Session::SendPathChallenge ()
{
uint8_t payload[SSU2_MAX_PACKET_SIZE];
payload[0] = eSSU2BlkPathChallenge;
size_t len = rand () % (m_MaxPayloadSize - 3);
htobe16buf (payload + 1, len);
if (len > 0)
RAND_bytes (payload + 3, len);
len += 3;
if (len < m_MaxPayloadSize)
len += CreatePaddingBlock (payload + len, m_MaxPayloadSize - len);
SendData (payload, len);
}
void SSU2Session::CleanUp (uint64_t ts)
{