[tkined] Probs with multicast

From: Carsten Zerbst (zerbst@tu-harburg.de)
Date: Wed Jul 05 2000 - 11:21:42 MET DST

Hello,

I have some problem with multicast. If I open sockets on different
groups and sockets and send with multicast to them, the results look
more like a broadcast. Disregarding the group, all client socket with
the same port get the packages. That is not the behaviour I expected.
Did I something wrong or haven't I understand the multicast
functionality ?

Bye, Carsten

===client.tcl====
package require Tnm
set c1 [udp multicast open 224.1.0.0 5678]
set c2 [udp multicast open 224.1.1.0 5678]
set c3 [udp multicast open 224.1.0.0 5679]
set c4 [udp multicast open 224.1.1.0 5679]

proc lesen {sock} {
   puts "\nSocket [udp info $sock],\n\tgesendet von [join [udp receive
$sock]]"
}

foreach sock {c1 c2 c3 c4} {
   udp bind [set $sock] readable "lesen [set $sock]"
}
vwait forever
=================

===server.tcl====

--package require Tnm
set s1 [udp multicast open 224.1.0.0 5678]

foreach group {224.1.0.0 224.1.1.0} {
   foreach port {5678 5679} {
      udp send $s1 $group $port ",\n\tgesendet an $group:$port"
   }
}
=================

-
Dipl. Ing. Carsten Zerbst | See the results of the
                                  | 1. European Tcl User Meeting !
zerbst@tu-harburg.de |
http://www.tu-harburg.de/~skfcz | http://www.tu-harburg.de/skf/tcltk 

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