[lkml]   [2001]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Multicast on loopback?

> > locally over the loopback interface. This does not work without adding a
> > bogus route statement to get the kernel to hand up the packets from
> > loopback to my waiting application.
> The multicast ABI includes the ability to toggle loopback of multicast
> datagrams. Use the socket options instead

I read that multicast loopback is by default enabled, and I have witnessed
this, when having my application bind to my ethernet interface, but the
datagrams do not seem to be looped back when I bind to the 'lo' interface.

Could this possibly be a conflict with the inherently 'looped back'
behavior of the loopback net driver?

As far as toggling the flag, or even reading it, I cannot, as I am
developing in Java.

For developing, I can easily kludge it to work, by adding a fake route
statement, forcing the packets back up to the application, but I want to
make sure the differing behavior is not a bug in the kernel networking

-Erik G. Burrows

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:17    [W:0.079 / U:1.860 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site