I have a servlet that sends and listens to a local UDP service. To
allow this, I established the following policy:
grant codebase "file:${catalina.base}/webapps/modbus/-" {
permission java.net.SocketPermission "localhost:502", "connect";
};
This allowed packets out to the external service, but not responses.
I changed it as follows:
grant codebase "file:${catalina.base}/webapps/modbus/-" {
permission java.net.SocketPermission "localhost:502",
"connect,accept,listen";
};
and it started working.
The client library in question creates a DatagramSocket(), then calls
receive() on it with a timeout. Before adding "accept,listen" t
always timed out.
Version information:
Tomcat/6.0.18
JVM 1.6.0_13-b03 Sun Microsystems Inc
O/S Linux 2.6.28-13-server i386
Here's my question: if this was failing, why didn't it throw a
SecurityException? It would have been less challenging to figure out
what was going on had there been one.
--Chris
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