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Path: utzoo!watmath!clyde!cbosgd!ihnp4!zehntel!hplabs!hao!seismo!umcp-cs!chris
From: chris@umcp-cs.UUCP (Chris Torek)
Newsgroups: net.unix-wizards
Subject: Re: 4.2 networking question
Message-ID: <2623@umcp-cs.UUCP>
Date: Mon, 21-Jan-85 11:50:37 EST
Article-I.D.: umcp-cs.2623
Posted: Mon Jan 21 11:50:37 1985
Date-Received: Wed, 23-Jan-85 19:25:58 EST
References: <188@wdl1.UUCP>
Organization: U of Maryland, Computer Science Dept., College Park, MD
Lines: 31

> Path: umcp-cs!seismo!harvard!talcott!panda!teddy!genrad!decvax!
> bellcore!allegra!ulysses!mhuxr!mhuxj!houxm!ihnp4!zehntel!dual!amdcad!
> fortune!wdl1!clt

Great galloping horney todes!  [Tryinta get inta the spirit for Dallas...)

> What I am doing: trying to establish a raw socket,
> with protocol number 15:

>	#define XNETPROTO	15
>	...
>	socknbr = socket(AF_INET,SOCK_RAW,XNETPROTO);

>	This call is returning the "Protocol not supported" error.
>	By the way, I have SETUIDed, so it is running in supervisor mode,
>	as it should, for using raw sockets.

Waaall, a couple of things: first, AF_INET SOCK_RAW will get you a raw
connection.  But you don't need (or want) a protocol field.  Instead,
you get to read and write headers yourself.  Lessee, to get to the IMP
(or whatever), you want to bind() in AF_INET to the interface address,
I think.

I'm sure y'all 'r gonna jump on me if I missed anything, so I'll
jest mosey on outta here now ...
-- 
(This line accidently left nonblank.)

In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
UUCP:	{seismo,allegra,brl-bmd}!umcp-cs!chris
CSNet:	chris@umcp-cs		ARPA:	chris@maryland