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Code Issues Releases Activity

correct MTU calculation through proxy

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orignal 2022-10-27 13:56:42 -04:00
parent 016222463d
commit 5fb1247b87
1 changed files with 12 additions and 2 deletions
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14
libi2pd/SSU2.cpp
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@ -45,7 +45,10 @@ namespace transport
if (m_IsThroughProxy) if (m_IsThroughProxy)
{ {
found = true; found = true;
i2p::context.SetMTU (SSU2_MIN_PACKET_SIZE, address->IsV4 ()); if (address->IsV6 ())
i2p::context.SetMTU (SSU2_MAX_PACKET_SIZE - SOCKS5_UDP_IPV6_REQUEST_HEADER_SIZE, false);
else
i2p::context.SetMTU (SSU2_MAX_PACKET_SIZE - SOCKS5_UDP_IPV4_REQUEST_HEADER_SIZE, true);
continue; // we don't need port for proxy continue; // we don't need port for proxy
} }
auto port = address->port; auto port = address->port;
@ -162,6 +165,8 @@ namespace transport
bool SSU2Server::IsSupported (const boost::asio::ip::address& addr) const bool SSU2Server::IsSupported (const boost::asio::ip::address& addr) const
{ {
if (m_IsThroughProxy)
return m_SocketV4.is_open ();
if (addr.is_v4 ()) if (addr.is_v4 ())
{ {
if (m_SocketV4.is_open ()) if (m_SocketV4.is_open ())
@ -178,7 +183,7 @@ namespace transport
uint16_t SSU2Server::GetPort (bool v4) const uint16_t SSU2Server::GetPort (bool v4) const
{ {
boost::system::error_code ec; boost::system::error_code ec;
boost::asio::ip::udp::endpoint ep = v4 ? m_SocketV4.local_endpoint (ec) : m_SocketV6.local_endpoint (ec); boost::asio::ip::udp::endpoint ep = (v4 || m_IsThroughProxy) ? m_SocketV4.local_endpoint (ec) : m_SocketV6.local_endpoint (ec);
if (ec) return 0; if (ec) return 0;
return ep.port (); return ep.port ();
} }
@ -1103,6 +1108,11 @@ namespace transport
void SSU2Server::ProcessNextPacketFromProxy (uint8_t * buf, size_t len) void SSU2Server::ProcessNextPacketFromProxy (uint8_t * buf, size_t len)
{ {
if (buf[2]) // FRAG
{
LogPrint (eLogWarning, "SSU2: Proxy packet fragmentation is not supported");
return;
}
size_t offset = 0; size_t offset = 0;
boost::asio::ip::udp::endpoint ep; boost::asio::ip::udp::endpoint ep;
switch (buf[3]) // ATYP switch (buf[3]) // ATYP