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Nuts and Bolts of a hub-app protocol
- Subject: Nuts and Bolts of a hub-app protocol
- From: "Michael McSharry" <mcs101main@xxxxxxx>
- Date: Fri, 8 Oct 2004 23:39:49 -0700
- References: <010d01c485ac$eb06d860$c800a8c0@mcs5>
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<equ9i0d5hov5aqtlauot596dfo7u5tpk54@4ax.com>
<016c01c48624$8d5fd8b0$c800a8c0@mcs5>
<ce5ai09c1re7eqpeu6v16p2ebcfpblu7tv@4ax.com>
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I'm trying to get a better understanding of the interaction of the hub and
=
other xap apps. I looked very closely at the xap specification and I
think=
I understand the general concept, but when I tinker with it I don't get ve=
ry far.
It appears that some exchanges happen on the 127.0.0.1 network and others
o=
n a LAN such as 192.xxx.xxx.xxx. I can see that the app always needs to
tr=
ansmit to port 3639 and in the heartbeat to inform the hub of the port it
i=
s listening on. I've tried sending the heartbeat on 127.x and 192.x and
th=
e hub logs the fist heartbeat on 192.x and all heartbeats on 127.x. When
i=
t is delivered on 192.x then it will forward the LAN messages to 192.x
unti=
l the timeout period of about 120 seconds. If delivered on 127.x the
hub/v=
iewer recognizes the app and logs the heartbeats but no messages are
receiv=
ed at the app node.
Is there one UDP socket or two UDP sockets used between the app and hub?
W=
hich network is used for which purpose in and out of the hub?
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<DIV><FONT face=Arial size=2>I'm trying to get a better
understanding of the
interaction of the hub and other xap apps. I looked very closely
at the
xap specification and I think I understand the general concept, but when I
tinker with it I don't get very far.</FONT></DIV>
<DIV><FONT face=Arial
size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>It appears that some exchanges
happen on the
127.0.0.1 network and others on a LAN such as 192.xxx.xxx.xxx. I
can see
that the app always needs to transmit to port 3639 and in the heartbeat to
inform the hub of the port it is listening on. I've tried sending
the
heartbeat on 127.x and 192.x and the hub logs the fist heartbeat
on 192.x
and all heartbeats on 127.x. When it is delivered on 192.x then
it will
forward the LAN messages to 192.x until the timeout period of about 120
seconds. If delivered on 127.x the hub/viewer recognizes the app
and logs
the heartbeats but no messages are received at the app
node.</FONT></DIV>
<DIV><FONT face=Arial
size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Is there one UDP socket or two UDP
sockets used
between the app and hub? Which network is used for which purpose
in and
out of the hub?</FONT></DIV><!-- **end egp html banner**
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