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Add port recycling to instance creation

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Made instance creation use previously used ports when available, to prevent
crashes caused by ports being used that are outside of the assigned range.
This commit is contained in:
Nexus 2021-12-14 11:05:33 +08:00
parent 259c236b72
commit ca8f0059a3
2 changed files with 26 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
dMasterServer/InstanceManager.cpp
View File

@ -43,7 +43,8 @@ Instance * InstanceManager::GetInstance(LWOMAPID mapID, bool isFriendTransfer, L
maxPlayers = GetHardCap(mapID);
}
instance = new Instance(mExternalIP, ++m_LastPort, mapID, ++m_LastInstanceID, cloneID, softCap, maxPlayers);
uint32_t port = GetFreePort();
instance = new Instance(mExternalIP, port, mapID, ++m_LastInstanceID, cloneID, softCap, maxPlayers);
//Start the actual process:
#ifdef _WIN32
@ -59,7 +60,7 @@ Instance * InstanceManager::GetInstance(LWOMAPID mapID, bool isFriendTransfer, L
cmd.append(std::to_string(mapID));
cmd.append(" -port ");
cmd.append(std::to_string(m_LastPort));
cmd.append(std::to_string(port));
cmd.append(" -instance ");
cmd.append(std::to_string(m_LastInstanceID));
cmd.append(" -maxclients ");
@ -74,8 +75,6 @@ Instance * InstanceManager::GetInstance(LWOMAPID mapID, bool isFriendTransfer, L
system(cmd.c_str());
m_LastPort++; //Increment it again because the next port is for World<->Server comm.
m_LastPort++; //Increment it again because the next port is for World<->Chat comm.
m_Instances.push_back(instance);
if (instance) {
@ -97,6 +96,25 @@ bool InstanceManager::IsPortInUse(uint32_t port) {
return false;
}
uint32_t InstanceManager::GetFreePort() {
uint32_t port = m_LastPort;
std::vector<uint32_t> usedPorts;
for (Instance* i : m_Instances) {
usedPorts.push_back(i->GetPort());
}
std::sort(usedPorts.begin(), usedPorts.end());
int portIdx = 0;
while (portIdx < usedPorts.size() && port == usedPorts[portIdx]) {
//increment by 3 since each instance uses 3 ports (instance, world-server, world-chat)
port += 3;
portIdx++;
}
return port;
}
void InstanceManager::AddPlayer(SystemAddress systemAddr, LWOMAPID mapID, LWOINSTANCEID instanceID) {
Instance* inst = FindInstance(mapID, instanceID);
if (inst) {
@ -291,7 +309,8 @@ Instance* InstanceManager::CreatePrivateInstance(LWOMAPID mapID, LWOCLONEID clon
int maxPlayers = 999;
instance = new Instance(mExternalIP, ++m_LastPort, mapID, ++m_LastInstanceID, cloneID, maxPlayers, maxPlayers, true, password);
uint32_t port = GetFreePort();
instance = new Instance(mExternalIP, port, mapID, ++m_LastInstanceID, cloneID, maxPlayers, maxPlayers, true, password);
//Start the actual process:
std::string cmd = "start ./WorldServer.exe -zone ";
@ -302,7 +321,7 @@ Instance* InstanceManager::CreatePrivateInstance(LWOMAPID mapID, LWOCLONEID clon
cmd.append(std::to_string(mapID));
cmd.append(" -port ");
cmd.append(std::to_string(m_LastPort));
cmd.append(std::to_string(port));
cmd.append(" -instance ");
cmd.append(std::to_string(m_LastInstanceID));
cmd.append(" -maxclients ");
@ -317,8 +336,6 @@ Instance* InstanceManager::CreatePrivateInstance(LWOMAPID mapID, LWOCLONEID clon
system(cmd.c_str());
m_LastPort++; //Increment it again because the next port is for World<->Server comm.
m_LastPort++; //Increment it again because the next port is for World<->Chat comm.
m_Instances.push_back(instance);
if (instance) return instance;

1
dMasterServer/InstanceManager.h
View File

@ -102,6 +102,7 @@ public:
Instance* GetInstance(LWOMAPID mapID, bool isFriendTransfer, LWOCLONEID cloneID); //Creates an instance if none found
bool IsPortInUse(uint32_t port);
uint32_t GetFreePort();
void AddPlayer(SystemAddress systemAddr, LWOMAPID mapID, LWOINSTANCEID instanceID);
void RemovePlayer(SystemAddress systemAddr, LWOMAPID mapID, LWOINSTANCEID instanceID);