From: EGAL Vincent <egal@ipanematech.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Port number problem
Date: Wed, 06 Nov 2002 11:14:32 +0000 [thread overview]
Message-ID: <marc-lartc-103658134217291@msgid-missing> (raw)
In-Reply-To: <marc-lartc-103657036108008@msgid-missing>
Pham Viet Ha wrote:
> Hello there,
>
> I am just a newbie. I got a bug when modifying CBQ scheduler in Linux
> Kernel 2.4. I just want to get the soure and destination port number
> of the packet (TCP/UDP). I used ntohs(skb->h.th->dest) for the
> destination port number of a TCP packet. It doesn't work. The printed
> value is not correct (we used FTP, port 21 to test).
>
> Did anyone meet the same issue? Please give me a hand.
>
> Thanks so much in advance.
>
> VietHa
hi,
should try something like this :
struct iphdr *iph = skb->nh.iph;
struct tcphdr *th;
if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) &&
(iph->protocol = IPPROTO_TCP))
{
th = (struct tcphdr*)(((u32*)iph) + iph->ihl);
if (ntohs(th->dest) = ....
}
--
Vincent EGAL
Email : egal@ipanematech.com
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prev parent reply other threads:[~2002-11-06 11:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-06 8:11 [LARTC] Port number problem Pham Viet Ha
2002-11-06 11:14 ` EGAL Vincent [this message]
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