Hi everyone,

I'm currently looking at jNetPcap (and jNetStream) for usage in a product of ours.

I'm running a amd64 Ubuntu (Lucid) with Java 1.6.

I wanted to ask two questions:
- Is there a ready-available 64 bit package hidden somewhere?
- If not: is there a clear, successful way of compiling the source on a 64 bit machine?

For the latter:
I've been trying to compile the 2.0 and the 1.3 branches, but have absolutely no luck.
The biggest error message that seems to pop up is
" : error: "not" cannot be used as a macro name as it is an operator in C++ "
I'm not sure what to make of that

Any help is greatly appreciated.
Thanks in advance,

Dieter

I have been experimenting with something that I think may come in handy. A C like structures defined via annotation. There are other libraries that do this kind of thing such as NPL in http://jnetstream project and google code Protocol Buffers. The difference here is that no external language is required and all is accomplished with a single annotation. The classes look very much like C structures and their behavior and limitations are nearly identical.

The advantage of such as a structure in jnetpcap pcap, would be if someone wanted to copy the values of a particular header and load them into a class. More specifically load values of a binary structure into fields of a class. This should, at least in theory, improve performance with working with such as structure since the code is simply accessing class fields, vs. using native methods to read a single primitive value out of a buffer. There should especially be noticeable performance increase if a structure has to be access many times.

The copy of data into the class fields is accomplished using JNI calls only once, thereafter the structure values are access via java fields (not methods). Theoretically increasing performance as java is greatly optimized for accessing values from class fields.

Here is the struct annotation javadoc comment that contains examples of how this API can be used:

---

Java C like structure. The annotation allows class fields to designated to be
applied as a C structure in the order of elements defined. The
{@link #value()} property defines the order of the structure elements within
the structure.

The following C structure has corresponding java counter part:

struct Abc {
  int a;
  int b;
  int c;
};

public class Abc {
 public @struct(0) int a; 
 public @struct(1) int b;
 public @struct(2) int c;