/proc/net/dev_mcast

[vprakash]

Hi friends,
I am doing multicast testing. I want to read the entries in the
/proc/net/dev_mcast means which entry is for what.Any one can explain
it in detail or any link where i can get the same. Thanks in advance.

[bwkaz]

After googling for "dev_mcast interpret", I found this page, which is part of the Filesystem Hierarchy Standard:

http://tldp.org/LDP/Linux-Filesystem...html/proc.html

which says that the fields in /proc/net/dev_mcast are:

the Layer2 multicast groups which a device is listening to (interface index, label, number of references, number of bound addresses).

In other words, this file contains all the groups that your machine is a member of. The layout of its fields is in parentheses in the text I quoted, although I'm not quite sure what each of the fields means.

[vprakash]

Thanks bwkaj,
I have already seen that web page. When i run any multicast receiver a entry is added in the /proc/net/dev_mcast. In palce of dmi_address(last index) i got a quite big number in hex. One thing i observed is that (eg - suppose e00056 is the multicast group i have joined) some number like 1005 is prefixed & 1 zero is removed from multicast group address and cascaded(01005e0056).
My doubt is what is 1005 & what it indicates. Can u please make it clear

[bwkaz]

I have no idea. You'd have to either look in the code, or find some other official documentation...