ok, I understood how this value update, it is increased with value equal
size of 2 packets after 2 packets sending successfully.
Thanks a lot.
On Tue, Mar 2, 2010 at 5:30 PM, Kieran Mansley <kie...@recoil.org> wrote:
> On Tue, 2010-03-02 at 17:22 +0700, PHAM ANH THIEN wrote:
> >
> > So do you know where unacked->seqno is calculated in the code?
>
> There is a list of unacked packets in each pcb (called pcb->unacked) and
> the seqno of this list will be the sequence number in the header of the
> first packet on this list. For example, the print statement you refer
> to accesses this value like this:
>
> LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: ACK for %"U32_F",
> unacked->seqno %"U32_F":%"U32_F"\n",
> ackno,
> pcb->unacked !=
> NULL?ntohl(pcb->unacked->tcphdr->seqno): 0,
> pcb->unacked !=
> NULL?ntohl(pcb->unacked->tcphdr->seqno) + TCP_TCPLEN(pcb->unacked): 0));
>
> I notice that it is printing unsiged values, so how you got a negative
> result I don't know.
>
> Kieran
>
>
>
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