Date: Wed, 12 Nov 1997 22:12:48 +0000 From: Brian Somers <brian@awfulhak.org> To: Feiyi Wang <fwang2@eos.ncsu.edu> Cc: questions@FreeBSD.ORG Subject: Re: divert socket problem Message-ID: <199711122212.WAA06756@awfulhak.demon.co.uk> In-Reply-To: Your message of "Wed, 12 Nov 1997 15:05:50 EST." <346A0C1E.687@eos.ncsu.edu>
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> Hi, there
>
> I am playing with DIVERT socket. Basically, I want to divert a
> particular protocol stream to another port, and read it from my program.
> The firewall rules I am using is pretty simple. 89 is the protocol
> number.
>
> /sbin/ipfw -f flush
> /sbin/ipfw divert 50000 89 from any to any
Do you mean
/sbin/ipfw add divert 50000 all from any 89 to any
> /sbin/ipfw pass all from any to any
>
> >From /sbin/ipfw show, I can see there ARE packets which match the rule 2
> and diverted. But I can't read anything, recvfrom() blocks. Am I
> missing something here? Anybody can help me out?
>
>
> sockfd = socket(AF_INET,SOCK_RAW, IPPROTO_DIVERT)
>
> addr.sin_family = AF_INET
> addr.sin_addr.s_addr=INADDR_ANY
> addr.sin_port=50000
>
> bind(sockfd, (struct sockaddr *)&addr, sizeof addr)
>
> readfrom(sockfd, ....)
Do you mean recvfrom() ? If so, this looks ok except for the above
ipfw command.
>
> Thanks
>
> /Feiyi
--
Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <bri@OpenBSD.org>
<http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour....
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