Muticast problem

[Peter Michalicka]

There is a example program on HP-UX 11.23:

/usr/lib/demos/networking/socket/serv.mcast.c

If I try to start the server twice the following message occurs:

Adress allready is use
unable to bind address

Is there a configuration necessary to allow multicasting at a given address (e.g. 224.168.0.255)

[RAC_1]

Looks like the port you are trying to bound, is in use.
netstat -an|grep "port_that_you_use_in_program"
This will give which process is using it. Unless it is free you will not be able to bind to it.

Anil

[Ralph Grothe]

You probably could try to modify your code to make use of the syscall setsockopt() and set SO_REUSEADRR
Usually it takes a time until a formerly bound to port is released.
I know that in the Perl IO::Socket module the contructor takes this parameter to accelerate reavailability

[Ralph Grothe]

You probably could try to modify your code to make use of the syscall setsockopt() and set SO_REUSEADRR
Usually it takes a time until a formerly bound to port is released.
I know that in the Perl IO::Socket module the constructor takes this parameter to accelerate reavailability

[Ralph Grothe]

Sorry for the double post.
Must have hit the submit button twice.