Raw Sockets

[dominic.j.steinitz@britishairways.com]

Simon,

Thanks for the reply.

I wanted to send ICMP packets. Linux does support AF_RAW. This compiles and
runs on my linux system.

     /*
       * Create the socket.
      */
     if ( (proto = getprotobyname("icmp")) == NULL)
          err_quit("unknown protocol: icmp");
      if ( (sockfd = socket(AF_INET, SOCK_RAW, proto->p_proto)) < 0)
            err_sys("can't create raw socket");

Dominic.





"Simon Marlow" <simonmar@microsoft.com>@haskell.org on 04/03/2002 12:00:33

Sent by:  glasgow-haskell-users-admin@haskell.org


To:   "Dominic Steinitz" <dominic.j.steinitz
      <glasgow-haskell-users
cc:
bcc:
Subject:  RE: Raw Sockets



> How do I use raw sockets? According to the documentation I
> can use AF_RAW.
> It also refers the user to the implementation in
> fptools/hslibs/net/SocketPrim.lhs. Do I really need to do
> this and if so
> how do I get it?

The SocketPrim library (aka Network.Socket) really only supports AF_INET
and AF_UNIX.  Many of the other AF_ things are quite system-dependent;
eg. Linux doesn't have AF_RAW.

The documentation is a bit slack, although it does mention at the top of
the Family(..) definition that "your mileage may vary depending on the
OS you use".

Do you really want a raw socket, or will a datagram (UDP) socket do?  If
so, you can just pass Datagram as the SocketType argument to
SocketPrim.socket.

Cheers,
     Simon
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