I think you're misunderstanding the packet format.
When you say that the representation is in "binary",
it doesn't mean the binary representation that you get
by doing unpack "B*"; it means that your data is packed
as if it's in a binary structure. So you have the right operator
(
pack), you just have the wrong
pack template.
I think that this will work for you:
my $data = "LOGON USERNAME=NAME PASSWORD=PASS\0";
my $packet = pack "CnCCNnn",
2, ## sync byte
length($data)+13, ## message size
13, ## header size
hex("4c"), ## message type
1, ## sequence ID
0, ## protocol ID
1; ## version number
$packet .= $data;
That pack template ("CnCCNnn") says to pack the
list of values (the rest of the arguments to
pack)
in the following way:
- unsigned char value (1 byte)
- short in network order (2 bytes)
- unsigned char value (1 byte)
- unsigned char value (1 byte)
- long in network order (4 bytes)
- short in network order (2 bytes)
- short in network order (2 bytes)
This varies from your use of
pack in two important
ways. First, we no longer use 'unpack "B*"', because
the point of that is to take a binary structure and
make it into a human-readable string that looks like
a sequence of bits. That's not what you want: you
want to send the data to the server as a binary
structure.
Second, you can't just use 'pack "N"'; that packs
everything as a network-order long, which is 4 bytes.
You don't want everything to be 4 bytes; some things
are 1 byte, some are 2, some are 4. You have to
vary you pack template depending on that.
