How to Distinguish between a reset packet and a normal packet
This is a discussion on How to Distinguish between a reset packet and a normal packet within the Linux Networking forums, part of the Linux Forums category; How Distinguish between a Reset Packet and a normal Data or Ack or Request packet....
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03-23-2007
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Re: How to Distinguish between a reset packet and a normal packet
On Thu, 22 Mar 2007 21:09:45 -0700, sairam wrote:
> How Distinguish between a Reset Packet and a normal Data or Ack or > Request packet. That's a pretty vague question. In what context? What protocol are you talking about? If you're talking about TCP, in a reset packet, the RST bit in the header is set. In an Ack packet the ACK bit is set. Dan 
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03-23-2007
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Re: How to Distinguish between a reset packet and a normal packet
Dan N wrote: > On Thu, 22 Mar 2007 21:09:45 -0700, sairam wrote: > > > How Distinguish between a Reset Packet and a normal Data or Ack or > > Request packet. > > That's a pretty vague question. In what context? What protocol are you > talking about? > > If you're talking about TCP, in a reset packet, the RST bit in the header > is set. In an Ack packet the ACK bit is set. > > Dan Iam talking in the sense of programming, when received a packet in my program it strips off all the header content, then how can I know the packet is a RST packet Sairam
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03-25-2007
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Re: How to Distinguish between a reset packet and a normal packet
sairam wrote:
> Dan N wrote: >> On Thu, 22 Mar 2007 21:09:45 -0700, sairam wrote: >> >>> How Distinguish between a Reset Packet and a normal Data or Ack or >>> Request packet. >> That's a pretty vague question. In what context? What protocol are you >> talking about? >> >> If you're talking about TCP, in a reset packet, the RST bit in the header >> is set. In an Ack packet the ACK bit is set. >> >> Dan > > Iam talking in the sense of programming, when received a packet in my > program it strips off all the header content, then how can I know the > packet is a RST packet http://www.networksorcery.com/enp/protocol/tcp.htm You just have to check if the RST bit (which is, i think, the 142 bit in the tcp header) is 1 or 0. Matthias
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03-27-2007
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Re: How to Distinguish between a reset packet and a normal packet
On Fri, 23 Mar 2007 03:14:47 -0700, sairam wrote:
> Iam talking in the sense of programming, when received a packet in my > program it strips off all the header content, then how can I know the > packet is a RST packet You should think in terms of a stream of data, not in terms of the underlying protocol. When you get a read of zero bytes, then you know that the stream has ended. The applications level doesn't know about reset packets. Dan
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