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limit mininal received packet size to 40 bytes

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orignal 2024-01-19 14:09:48 -05:00
parent b4484c8e8f
commit 140146e433
2 changed files with 10 additions and 2 deletions
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9
libi2pd/SSU2.cpp
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@ -283,8 +283,15 @@ namespace transport
// but better to find out which host were sent it and mark that router as unreachable // but better to find out which host were sent it and mark that router as unreachable
{ {
i2p::transport::transports.UpdateReceivedBytes (bytes_transferred); i2p::transport::transports.UpdateReceivedBytes (bytes_transferred);
if (bytes_transferred < SSU2_MIN_RECEIVED_PACKET_SIZE)
{
// drop too short packets
m_PacketsPool.ReleaseMt (packet);
Receive (socket);
return;
}
packet->len = bytes_transferred; packet->len = bytes_transferred;
boost::system::error_code ec; boost::system::error_code ec;
size_t moreBytes = socket.available (ec); size_t moreBytes = socket.available (ec);
if (!ec && moreBytes) if (!ec && moreBytes)

3
libi2pd/SSU2.h
View file

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2022-2023, The PurpleI2P Project * Copyright (c) 2022-2024, The PurpleI2P Project
* *
* This file is part of Purple i2pd project and licensed under BSD3 * This file is part of Purple i2pd project and licensed under BSD3
* *
@ -27,6 +27,7 @@ namespace transport
const size_t SSU2_SOCKET_RECEIVE_BUFFER_SIZE = 0x1FFFF; // 128K const size_t SSU2_SOCKET_RECEIVE_BUFFER_SIZE = 0x1FFFF; // 128K
const size_t SSU2_SOCKET_SEND_BUFFER_SIZE = 0x1FFFF; // 128K const size_t SSU2_SOCKET_SEND_BUFFER_SIZE = 0x1FFFF; // 128K
const size_t SSU2_MAX_NUM_INTRODUCERS = 3; const size_t SSU2_MAX_NUM_INTRODUCERS = 3;
const size_t SSU2_MIN_RECEIVED_PACKET_SIZE = 40; // 16 byte short header + 8 byte minimum payload + 16 byte MAC
const int SSU2_TO_INTRODUCER_SESSION_DURATION = 3600; // 1 hour const int SSU2_TO_INTRODUCER_SESSION_DURATION = 3600; // 1 hour
const int SSU2_TO_INTRODUCER_SESSION_EXPIRATION = 4800; // 80 minutes const int SSU2_TO_INTRODUCER_SESSION_EXPIRATION = 4800; // 80 minutes
const int SSU2_KEEP_ALIVE_INTERVAL = 15; // in seconds const int SSU2_KEEP_ALIVE_INTERVAL = 15; // in seconds