Useless networking code ?

Noone could answer that shit :

If we have a look at (tcp.c) the functions tcp_recv_skb() and
tcp_read_sock() (and even tcp_recvmsg()):

there is a Syn check :

extract from the tcp_recv_skb() :

offset = seq - TCP_SKB_CB(skb)->seq;
if (skb->h.th->syn)
offset--;

seq contains copied_seq, which refers to the last passed sequence
number. But if we have not receive data (the case if we receive a
SYN), the check seems useless...

I don't think i'll get a reply here, but maybe ...