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If-statements are simplified. Checks are rearranged for faster errors detection without unnecessary actions.

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This commit is contained in:
Volt Amperoff 2022-03-27 18:05:37 +03:00
parent 7e7aee27b6
commit 4977f9e6b4
1 changed files with 21 additions and 26 deletions
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47
libi2pd_client/I2CP.cpp
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@ -524,21 +524,31 @@ namespace client
void I2CPSession::CreateSessionMessageHandler (const uint8_t * buf, size_t len)
{
if (m_Destination || !m_Owner.InsertSession (shared_from_this ()))
{
LogPrint (eLogError, "I2CP: Session already exists");
SendSessionStatusMessage (eI2CPSessionStatusRefused); // refused
return;
}
RAND_bytes ((uint8_t *)&m_SessionID, 2);
auto identity = std::make_shared<i2p::data::IdentityEx>();
size_t offset = identity->FromBuffer (buf, len);
if (!offset)
{
LogPrint (eLogError, "I2CP: Create session malformed identity");
SendSessionStatusMessage (eI2CPSessionStatusInvalid); // invalid
return;
}
if (m_Owner.FindSessionByIdentHash (identity->GetIdentHash ()))
{
LogPrint (eLogError, "I2CP: Create session duplicate address ", identity->GetIdentHash ().ToBase32 ());
SendSessionStatusMessage (eI2CPSessionStatusInvalid); // invalid
return;
}
uint16_t optionsSize = bufbe16toh (buf + offset);
offset += 2;
if (optionsSize > len - offset)
@ -547,42 +557,27 @@ namespace client
SendSessionStatusMessage (eI2CPSessionStatusInvalid); // invalid
return;
}
std::map<std::string, std::string> params;
ExtractMapping (buf + offset, optionsSize, params);
offset += optionsSize; // options
if (params[I2CP_PARAM_MESSAGE_RELIABILITY] == "none") m_IsSendAccepted = false;
offset += 8; // date
if (identity->Verify (buf, offset, buf + offset)) // signature
{
if (!m_Destination)
{
m_Destination = m_Owner.IsSingleThread () ?
std::make_shared<I2CPDestination>(m_Owner.GetService (), shared_from_this (), identity, true, params):
std::make_shared<RunnableI2CPDestination>(shared_from_this (), identity, true, params);
if (m_Owner.InsertSession (shared_from_this ()))
{
SendSessionStatusMessage (eI2CPSessionStatusCreated); // created
LogPrint (eLogDebug, "I2CP: Session ", m_SessionID, " created");
m_Destination->Start ();
}
else
{
LogPrint (eLogError, "I2CP: Session already exists");
SendSessionStatusMessage (eI2CPSessionStatusRefused);
}
}
else
{
LogPrint (eLogError, "I2CP: Session already exists");
SendSessionStatusMessage (eI2CPSessionStatusRefused); // refused
}
}
else
if (!identity->Verify (buf, offset, buf + offset)) // signature
{
LogPrint (eLogError, "I2CP: Create session signature verification failed");
SendSessionStatusMessage (eI2CPSessionStatusInvalid); // invalid
return;
}
m_Destination = m_Owner.IsSingleThread () ?
std::make_shared<I2CPDestination>(m_Owner.GetService (), shared_from_this (), identity, true, params):
std::make_shared<RunnableI2CPDestination>(shared_from_this (), identity, true, params);
SendSessionStatusMessage (eI2CPSessionStatusCreated); // created
LogPrint (eLogDebug, "I2CP: Session ", m_SessionID, " created");
m_Destination->Start ();
}
void I2CPSession::DestroySessionMessageHandler (const uint8_t * buf, size_t len)