>
> On Aug 7, 2017, at 4:43 AM, Simonas Kazlauskas <simonas.kazlaus...@elgama.eu>
> wrote:
>
> So it seems like for some reason the pcb->snd_nxt is one-off.
This seems really strange. For an active open, sending of the SYN packet
advances pcb->snd_nxt by 1. See the following code in tcp_output():
snd_nxt = lwip_ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg);
if (TCP_SEQ_LT(pcb->snd_nxt, snd_nxt)) {
pcb->snd_nxt = snd_nxt;
}
In tcp_priv.h:
#define TCP_TCPLEN(seg) ((seg)->len + (((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN |
TCP_SYN)) != 0) ? 1U : 0U))
Joel_______________________________________________
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