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ClientInterface: add a function to verify (correctly) if user limit was reached (#6258)

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* ClientInterface: add a function to verify (correctly) if user limit was reached

CS_HelloSent is a better indicator of active slots than CS_Created, which are session objects created after init packet reception

Switch existing checks to ClientInterface::isUserLimitReached()

Use range-based for loop for getClientIds() used function too

This will fix #6254 (not the memory overhead if init is flooded)
This commit is contained in:
Loïc Blot 2017-08-16 23:48:29 +02:00 committed by SmallJoker
parent 9d40d89d27
commit 151c19a6be
3 changed files with 15 additions and 3 deletions
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10
src/clientiface.cpp
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@ -633,6 +633,16 @@ std::vector<u16> ClientInterface::getClientIDs(ClientState min_state)
return reply;
}
/**
* Verify if user limit was reached.
* User limit count all clients from HelloSent state (MT protocol user) to Active state
* @return true if user limit was reached
*/
bool ClientInterface::isUserLimitReached()
{
return getClientIDs(CS_HelloSent).size() >= g_settings->getU16("max_users");
}
void ClientInterface::step(float dtime)
{
m_print_info_timer += dtime;

4
src/clientiface.h
View File

@ -449,6 +449,9 @@ public:
/* get list of active client id's */
std::vector<u16> getClientIDs(ClientState min_state=CS_Active);
/* verify is server user limit was reached */
bool isUserLimitReached();
/* get list of client player names */
const std::vector<std::string> &getPlayerNames() const { return m_clients_names; }
@ -493,7 +496,6 @@ public:
}
static std::string state2Name(ClientState state);
protected:
//TODO find way to avoid this functions
void lock() { m_clients_mutex.lock(); }

4
src/network/serverpackethandler.cpp
View File

@ -211,7 +211,7 @@ void Server::handleCommand_Init(NetworkPacket* pkt)
// Enforce user limit.
// Don't enforce for users that have some admin right
if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
if (m_clients.isUserLimitReached() &&
!checkPriv(playername, "server") &&
!checkPriv(playername, "ban") &&
!checkPriv(playername, "privs") &&
@ -520,7 +520,7 @@ void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
// Enforce user limit.
// Don't enforce for users that have some admin right
if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
if (m_clients.isUserLimitReached() >= g_settings->getU16("max_users") &&
!checkPriv(playername, "server") &&
!checkPriv(playername, "ban") &&
!checkPriv(playername, "privs") &&