I try this before. It works.
in tcp.c
err_t
tcp_close(struct tcp_pcb *pcb)
{
....
case ESTABLISHED:
if( rstClose & 0x1) // rstClose is a control flag.
{
err = tcp_send_ctrl(pcb, TCP_FIN);
if (err == ERR_OK) {
snmp_inc_tcpestabresets();
pcb->state = FIN_WAIT_1;
}
}
else
{
tcp_abort(pcb);
err = ERR_OK;
pcb = NULL;
}
break;
...
}
I ask the similar question before. For the TCP/IP standard, the FIN is a
good solution. But the RST is a shotcut solution in certain environment.
On Wed, Dec 8, 2010 at 10:53 PM, Jeff Barber <[email protected]> wrote:
> On Tue, Dec 7, 2010 at 10:23 PM, runjin <[email protected]> wrote:
> > I found that closesocket sends a FIN packet,
> > How to send RST ?
>
> AFAIK, there is no way to send RST using the socket or netconn APIs.
> But then this is not something that is normally available to
> applications in other OSes like Linux or Windows either. (If you're
> using the raw API, you can call tcp_abort. However, that's not
> something you can mix with the other APIs.)
>
> What are you trying to accomplish by sending a RST?
>
> Jeff
>
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>
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