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better packaging

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orignal 2014-10-20 21:39:32 -04:00
parent 43a989872d
commit 898c81b5d6
1 changed files with 18 additions and 1 deletions
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19
TunnelGateway.cpp
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@ -12,8 +12,12 @@ namespace tunnel
{
void TunnelGatewayBuffer::PutI2NPMsg (const TunnelMessageBlock& block)
{
bool messageCreated = false;
if (!m_CurrentTunnelDataMsg)
{
CreateCurrentTunnelDataMessage ();
messageCreated = true;
}
// create delivery instructions
uint8_t di[43]; // max delivery instruction length is 43 for tunnel
@ -33,7 +37,8 @@ namespace tunnel
// create fragments
I2NPMessage * msg = block.data;
if (diLen + msg->GetLength () + 2<= m_RemainingSize)
auto fullMsgLen = diLen + msg->GetLength () + 2; // delivery instructions + payload + 2 bytes length
if (fullMsgLen <= m_RemainingSize)
{
// message fits. First and last fragment
*(uint16_t *)(di + diLen) = htobe16 (msg->GetLength ());
@ -48,6 +53,18 @@ namespace tunnel
}
else
{
if (!messageCreated) // check if we should complete previous message
{
auto numFollowOnFragments = fullMsgLen / TUNNEL_DATA_MAX_PAYLOAD_SIZE;
// length of bytes don't fit full tunnel message
// every follow-on fragment adds 7 bytes
auto nonFit = (fullMsgLen + numFollowOnFragments*7) % TUNNEL_DATA_MAX_PAYLOAD_SIZE;
if (!nonFit || nonFit > m_RemainingSize)
{
CompleteCurrentTunnelDataMessage ();
CreateCurrentTunnelDataMessage ();
}
}
if (diLen + 6 <= m_RemainingSize)
{
// delivery instructions fit