Raw socket PF_PACKET questions

Hi,

I'm working with raw-ethernet sockets, and there are some questions
that have arisen to me during my work. Hope someone knows the answers !

1) Bind step is always necessary when opening PF_PACKET sockets? Only
in sending, in receiving, in both?

2) Is there any patch that solves problem of getting repeated packets
when using loopback interface + multicast?

3) I cannot receive broadcast messages from a raw ethernet socket which
i open this way:

sk = socket (PF_PACKET,SOCK_RAW,0);

do i need to pass any kind of option to the socket to enable broadcast
receiving?


Thanx a lot in advance,
Manuel Cotallo.

.

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