[jboss-jira] [JBoss JIRA] (WFCORE-2026) source-port is wrongly offsetted when configured to 0, i.e. ephemeral port; results in "Permission denied (Bind failed)"

[Radoslav Husar (JIRA)]

Radoslav Husar created WFCORE-2026:
--------------------------------------

             Summary: source-port is wrongly offsetted when configured to 0, i.e. ephemeral port; results in "Permission denied (Bind failed)"
                 Key: WFCORE-2026
                 URL: https://issues.jboss.org/browse/WFCORE-2026
             Project: WildFly Core
          Issue Type: Bug
          Components: Server
    Affects Versions: 3.0.0.Alpha12
            Reporter: Radoslav Husar
            Assignee: Radoslav Husar
             Fix For: 3.0.0.Alpha13


There is a discrepancy between how 0 is handled.

XSD
{noformat}
        <xs:attribute name="source-port" type="xs:positiveInteger" use="optional">
{noformat}
doesn't allow 0.

MODEL
{noformat}
            .setAllowExpression(true).setValidator(new IntRangeValidator(0, 65535, true, true))
{noformat}

IMPLEMENTATION

{noformat}
    public Integer getAbsoluteSourcePort() {
        if (this.sourcePort == null) {
            return null;
        }
        if (this.fixedSourcePort) {
            return this.sourcePort;
        }
        final int portOffset = this.socketBindingManager.getPortOffset();
        return this.sourcePort + portOffset;
    }
{noformat}
doesn't treat 0 correctly, relies on null value.


Example to reproduce e.g. with modcluster integration in core:

{noformat}
[standalone at localhost:9990 /] /socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=proxy1:add(port=9090,host=127.0.0.1,source-port=0
{
    "outcome" => "success",
    "response-headers" => {"process-state" => "reload-required"}
}
[standalone at localhost:9990 /] /subsystem=modcluster/mod-cluster-config=configuration:write-attribute(name=proxies,value=[proxy1])
{
    "outcome" => "success",
    "response-headers" => {
        "operation-requires-reload" => true,
        "process-state" => "reload-required"
    }
}
[standalone at localhost:9990 /] :reload
{
    "outcome" => "success",
    "result" => undefined
}
{noformat}

Starting server with 
{noformat}
-Djboss.socket.binding.port-offset=100
{noformat}

yields

{noformat}
20:15:40,471 ERROR [org.jboss.modcluster] (UndertowEventHandlerAdapter - 1) MODCLUSTER000043: Failed to send INFO command to localhost/127.0.0.1:9090: Permission denied (Bind failed)
{noformat}



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