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MTU for ipv6

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orignal 2014-10-29 11:17:30 -04:00
parent 7e82686818
commit d84a7ebc7e
3 changed files with 17 additions and 9 deletions
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12
SSUData.cpp
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@ -13,7 +13,8 @@ namespace transport
SSUData::SSUData (SSUSession& session):
m_Session (session), m_ResendTimer (session.m_Server.GetService ())
{
m_PacketSize = SSU_MAX_PACKET_SIZE;
m_MaxPacketSize = session.IsV6 () ? SSU_V6_MAX_PACKET_SIZE : SSU_V4_MAX_PACKET_SIZE;
m_PacketSize = m_MaxPacketSize;
auto remoteRouter = session.GetRemoteRouter ();
if (remoteRouter)
AdjustPacketSize (*remoteRouter);
@ -36,19 +37,22 @@ namespace transport
auto ssuAddress = remoteRouter.GetSSUAddress ();
if (ssuAddress && ssuAddress->mtu)
{
m_PacketSize = ssuAddress->mtu - IPV4_HEADER_SIZE - UDP_HEADER_SIZE;
if (m_Session.IsV6 ())
m_PacketSize = ssuAddress->mtu - IPV6_HEADER_SIZE - UDP_HEADER_SIZE;
else
m_PacketSize = ssuAddress->mtu - IPV4_HEADER_SIZE - UDP_HEADER_SIZE;
if (m_PacketSize > 0)
{
// make sure packet size multiple of 16
m_PacketSize >>= 4;
m_PacketSize <<= 4;
if (m_PacketSize > (int)SSU_MAX_PACKET_SIZE) m_PacketSize = SSU_MAX_PACKET_SIZE;
if (m_PacketSize > m_MaxPacketSize) m_PacketSize = m_MaxPacketSize;
LogPrint ("MTU=", ssuAddress->mtu, " packet size=", m_PacketSize);
}
else
{
LogPrint (eLogWarning, "Unexpected MTU ", ssuAddress->mtu);
m_PacketSize = SSU_MAX_PACKET_SIZE;
m_PacketSize = m_MaxPacketSize;
}
}
}