Hi
I has a question about the tcp reopen request in func tcp_in_window.
The code is below,what confuse me is that the var end is never after sender->td_end.
static int tcp_in_window(struct ip_ct_tcp *state,
...
if (sender->td_end == 0) {
...
} else if (((state->state == TCP_CONNTRACK_SYN_SENT
&& dir == IP_CT_DIR_ORIGINAL)
|| (state->state == TCP_CONNTRACK_SYN_RECV
&& dir == IP_CT_DIR_REPLY))
&& after(end, sender->td_end)) {
...
}
...
}
When nf_conn rcv a syn request in TIME_WAIT state,the new_state is SYN_SNET.
in func tcp_packet, this nf_conn will be kill by nf_ct_kill and the syn packet will repeat.
So we will have a new nf_conn,whose sender->td_end is reset in func tcp_new.
finally,when this syn packet arrive tcp_in_window,the var end is equal to sender->td_end.
Maybe there is the other situation Or what I understand is totally wrong?
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