28  * | 31 ...   6 |  5  |  4   | 3 2 1 0 |
40 #define TS_OPT_ECN		BIT(5)
161 u32 __cookie_v4_init_sequence(const struct iphdr *iph, const struct tcphdr *th,  in __cookie_v4_init_sequence()  argument
173 				     th->source, th->dest, ntohl(th->seq),  in __cookie_v4_init_sequence()
181 	const struct tcphdr *th = tcp_hdr(skb);  in cookie_v4_init_sequence()  local
183 	return __cookie_v4_init_sequence(iph, th, mssp);  in cookie_v4_init_sequence()
190 int __cookie_v4_check(const struct iphdr *iph, const struct tcphdr *th,  in __cookie_v4_check()  argument
193 	__u32 seq = ntohl(th->seq) - 1;  in __cookie_v4_check()
195 					    th->source, th->dest, seq);  in __cookie_v4_check()
330 	const struct tcphdr *th = tcp_hdr(skb);  in cookie_v4_check()  local
331 	__u32 cookie = ntohl(th->ack_seq) - 1;  in cookie_v4_check()
340 	if (!sock_net(sk)->ipv4.sysctl_tcp_syncookies || !th->ack || th->rst)  in cookie_v4_check()
346 	mss = __cookie_v4_check(ip_hdr(skb), th, cookie);  in cookie_v4_check()
375 	treq->rcv_isn		= ntohl(th->seq) - 1;  in cookie_v4_check()
380 	ireq->ir_num		= ntohs(th->dest);  in cookie_v4_check()
381 	ireq->ir_rmt_port	= th->source;  in cookie_v4_check()
420 			   ireq->ir_loc_addr, th->source, th->dest, sk->sk_uid);  in cookie_v4_check()