Lar
11th June, 2008, 06:10 PM
Greetings!!
A friend and I decided to play some Unreal via LAN the other day, but we came across an unusual problem. As the title states, we were trying to run a server on Vista. The game itself runs fine, it's just that when we created a server, we weren't able to see it from any other client on the LAN. I'm quite familiar with port forwarding (not needed on LAN) and opening ports on firewalls. All of that checked out, but we still weren't able to see the server on the LAN. I did some investigating and found this in the log file:
Log: UdpServerQuery DmAriza.UdpServerQuery0 (Function IpServer.UdpServerQuery.PreBeginPlay:002E) BindPort: bind failed
UdpServerQuery: Port failed to bind.
The game port, 7777, bound just fine, but UdpServerQuery port, 7778, did not. Also, ServerBeaconPort, 7775, bound as well. I dug a little deeper and discovered that the native "BindPort()" function wasn't incrementing the port number like it should. When UdpServerQuery requests a port to bind to, it always tries 7777 first (Level.Game.GetServerPort()), but it will fail. the BindPort() function is suppose to increment the port number and try again before returning the result to UdpServerQuery.
I loaded up other games based on UE1 tech (UT99, Rune, and WoT), and the same bug occurred with all of them. I also loaded UT2004, but it worked without problems. I did some more digging to find out why UT2004 worked, but the others didn't.
The function responsible for requesting the query port looks like this in Unreal:
class UdpServerQuery extends UdpLink config;
...
...
// Initialize.
function PreBeginPlay()
{
// Set the Tag
Tag = QueryName;
// Bind the listen socket
if( !BindPort(Level.Game.GetServerPort(), true) )
{
Log("UdpServerQuery: Port failed to bind.");
return;
}
}
In UT2004, the function looks like this:
class UdpGameSpyQuery extends UdpLink config;
...
...
function PreBeginPlay()
{
local int boundport, requestport;
// Set the Tag
Tag = QueryName;
// Bind the listen socket
requestport = Level.Game.GetServerPort()+10;
boundport = BindPort(requestport, true);
if( boundport == 0 )
{
Log("UdpServerQuery: Port failed to bind.");
return;
}
Log("UdpServerQuery(crt): Port "$boundport$" successfully bound.");
...
...
}
Notice how 10 is added to Level.Game.GetServerPort() before it's passed to the BindPort() call. I did a little experiment and created a modified version of UdpServerQuery that added 1 to Level.Game.GetServerPort() in the BindPort() call. I ran the server, and lo and behold it worked!! That told me that BindPort() wasn't incrementing like it should.
The gist of my whole spiel is to find out if anyone else has had this problem running an Unreal server on Vista and if a solution was found. I appreciate any help that is given.
-Later!
A friend and I decided to play some Unreal via LAN the other day, but we came across an unusual problem. As the title states, we were trying to run a server on Vista. The game itself runs fine, it's just that when we created a server, we weren't able to see it from any other client on the LAN. I'm quite familiar with port forwarding (not needed on LAN) and opening ports on firewalls. All of that checked out, but we still weren't able to see the server on the LAN. I did some investigating and found this in the log file:
Log: UdpServerQuery DmAriza.UdpServerQuery0 (Function IpServer.UdpServerQuery.PreBeginPlay:002E) BindPort: bind failed
UdpServerQuery: Port failed to bind.
The game port, 7777, bound just fine, but UdpServerQuery port, 7778, did not. Also, ServerBeaconPort, 7775, bound as well. I dug a little deeper and discovered that the native "BindPort()" function wasn't incrementing the port number like it should. When UdpServerQuery requests a port to bind to, it always tries 7777 first (Level.Game.GetServerPort()), but it will fail. the BindPort() function is suppose to increment the port number and try again before returning the result to UdpServerQuery.
I loaded up other games based on UE1 tech (UT99, Rune, and WoT), and the same bug occurred with all of them. I also loaded UT2004, but it worked without problems. I did some more digging to find out why UT2004 worked, but the others didn't.
The function responsible for requesting the query port looks like this in Unreal:
class UdpServerQuery extends UdpLink config;
...
...
// Initialize.
function PreBeginPlay()
{
// Set the Tag
Tag = QueryName;
// Bind the listen socket
if( !BindPort(Level.Game.GetServerPort(), true) )
{
Log("UdpServerQuery: Port failed to bind.");
return;
}
}
In UT2004, the function looks like this:
class UdpGameSpyQuery extends UdpLink config;
...
...
function PreBeginPlay()
{
local int boundport, requestport;
// Set the Tag
Tag = QueryName;
// Bind the listen socket
requestport = Level.Game.GetServerPort()+10;
boundport = BindPort(requestport, true);
if( boundport == 0 )
{
Log("UdpServerQuery: Port failed to bind.");
return;
}
Log("UdpServerQuery(crt): Port "$boundport$" successfully bound.");
...
...
}
Notice how 10 is added to Level.Game.GetServerPort() before it's passed to the BindPort() call. I did a little experiment and created a modified version of UdpServerQuery that added 1 to Level.Game.GetServerPort() in the BindPort() call. I ran the server, and lo and behold it worked!! That told me that BindPort() wasn't incrementing like it should.
The gist of my whole spiel is to find out if anyone else has had this problem running an Unreal server on Vista and if a solution was found. I appreciate any help that is given.
-Later!