150 	struct tcphdr *th = NULL;  in th_get()  local
159 	if (!net_pkt_is_contiguous(pkt, sizeof(*th))) {  in th_get()
160 		if (tcp_pkt_linearize(pkt, ip_len, sizeof(*th)) < 0) {  in th_get()
167 	th = net_pkt_cursor_get_pos(pkt);  in th_get()
169 	return th;  in th_get()
187 			struct tcphdr *th;  in tcp_endpoint_set()  local
189 			th = th_get(pkt);  in tcp_endpoint_set()
190 			if (!th) {  in tcp_endpoint_set()
196 			ep->sin.sin_port = src == TCP_EP_SRC ? th_sport(th) :  in tcp_endpoint_set()
197 							       th_dport(th);  in tcp_endpoint_set()
211 			struct tcphdr *th;  in tcp_endpoint_set()  local
213 			th = th_get(pkt);  in tcp_endpoint_set()
214 			if (!th) {  in tcp_endpoint_set()
220 			ep->sin6.sin6_port = src == TCP_EP_SRC ? th_sport(th) :  in tcp_endpoint_set()
221 								 th_dport(th);  in tcp_endpoint_set()
278 	struct tcphdr *th = th_get(pkt);  in tcp_data_len()  local
279 	size_t tcp_options_len = (th_off(th) - 5) * 4;  in tcp_data_len()
281 		net_pkt_ip_opts_len(pkt) - sizeof(*th) - tcp_options_len;  in tcp_data_len()
291 	struct tcphdr *th = th_get(pkt);  in tcp_th()  local
295 	if (th_off(th) < 5) {  in tcp_th()
297 				"bogus th_off: %hu", (uint16_t)th_off(th));  in tcp_th()
302 			"%s Seq=%u", tcp_flags(th_flags(th)), th_seq(th));  in tcp_th()
304 	if (th_flags(th) & ACK) {  in tcp_th()
306 				" Ack=%u", th_ack(th));  in tcp_th()
952 		struct tcphdr *th = th_get(pkt);  in tcp_check_pending_data()  local
953 		uint32_t expected_seq = th_seq(th) + len;  in tcp_check_pending_data()
960 		gap_size = (int32_t)(pending_seq - th_seq(th) - ((uint32_t)len));  in tcp_check_pending_data()
1047 	struct tcphdr *th;  in tcp_header_add()  local
1049 	th = (struct tcphdr *)net_pkt_get_data(pkt, &tcp_access);  in tcp_header_add()
1050 	if (!th) {  in tcp_header_add()
1054 	memset(th, 0, sizeof(struct tcphdr));  in tcp_header_add()
1056 	UNALIGNED_PUT(conn->src.sin.sin_port, &th->th_sport);  in tcp_header_add()
1057 	UNALIGNED_PUT(conn->dst.sin.sin_port, &th->th_dport);  in tcp_header_add()
1058 	th->th_off = 5;  in tcp_header_add()
1061 		th->th_off++;  in tcp_header_add()
1064 	UNALIGNED_PUT(flags, &th->th_flags);  in tcp_header_add()
1065 	UNALIGNED_PUT(htons(conn->recv_win), &th->th_win);  in tcp_header_add()
1066 	UNALIGNED_PUT(htonl(seq), &th->th_seq);  in tcp_header_add()
1069 		UNALIGNED_PUT(htonl(conn->ack), &th->th_ack);  in tcp_header_add()
1135 	recv_mss |= (NET_TCP_MSS_OPT << 24) | (NET_TCP_MSS_SIZE << 16);  in net_tcp_set_mss_opt()
1757 	struct tcphdr *th;  in tcp_recv()  local
1768 	th = th_get(pkt);  in tcp_recv()
1770 	if (th_flags(th) & SYN && !(th_flags(th) & ACK)) {  in tcp_recv()
1796 static uint8_t unique_key[16]; /* MD5 128 bits as described in RFC6528 */
1816 	uint8_t hash[16];  in tcpv6_init_isn()
1851 	uint8_t hash[16];  in tcpv4_init_isn()
2297 	struct tcphdr *th = pkt ? th_get(pkt) : NULL;  in tcp_in()  local
2301 	size_t tcp_options_len = th ? (th_off(th) - 5) * 4 : 0;  in tcp_in()
2311 	if (th) {  in tcp_in()
2313 		fl = th_flags(th) & ~(ECN | CWR);  in tcp_in()
2324 	if (th && th_off(th) < 5) {  in tcp_in()
2333 		if (!tcp_validate_seq(conn, th)) {  in tcp_in()
2356 	if (th && (conn->state != TCP_LISTEN) && (conn->state != TCP_SYN_SENT) &&  in tcp_in()
2357 	    tcp_validate_seq(conn, th) && FL(&fl, &, SYN)) {  in tcp_in()
2371 	if (th) {  in tcp_in()
2372 		conn->send_win = ntohs(th_win(th));  in tcp_in()
2406 			conn_ack(conn, th_seq(th) + 1); /* capture peer's isn */  in tcp_in()
2427 		if (FL(&fl, &, ACK, th_ack(th) == conn->seq &&  in tcp_in()
2428 				th_seq(th) == conn->ack)) {  in tcp_in()
2483 		if (FL(&fl, &, SYN | ACK, th && th_ack(th) == conn->seq)) {  in tcp_in()
2485 			conn_ack(conn, th_seq(th) + 1);  in tcp_in()
2516 		if (th && FL(&fl, ==, (FIN | ACK), th_seq(th) == conn->ack)) {  in tcp_in()
2517 			if (net_tcp_seq_cmp(th_ack(th), conn->seq) > 0) {  in tcp_in()
2518 				uint32_t len_acked = th_ack(th) - conn->seq;  in tcp_in()
2528 		} else if (th && FL(&fl, ==, FIN, th_seq(th) == conn->ack)) {  in tcp_in()
2534 		} else if (th && FL(&fl, ==, (FIN | ACK | PSH),  in tcp_in()
2535 				    th_seq(th) == conn->ack)) {  in tcp_in()
2553 		if (th && (net_tcp_seq_cmp(th_ack(th), conn->seq) == 0)) {  in tcp_in()
2594 		if (th && (net_tcp_seq_cmp(th_ack(th), conn->seq) > 0)) {  in tcp_in()
2595 			uint32_t len_acked = th_ack(th) - conn->seq;  in tcp_in()
2670 		if (th) {  in tcp_in()
2671 			if (th_seq(th) == conn->ack) {  in tcp_in()
2682 			} else if (net_tcp_seq_greater(conn->ack, th_seq(th))) {  in tcp_in()
2696 						      th_seq(th));  in tcp_in()
2725 		if (th && FL(&fl, ==, ACK, th_seq(th) == conn->ack)) {  in tcp_in()
2744 		if (th) {  in tcp_in()
2747 			if (tcp_compute_new_length(conn, th, len, false) > 0) {  in tcp_in()
2759 			if (FL(&fl, &, ACK, th_ack(th) == conn->seq)) {  in tcp_in()
2773 			if (FL(&fl, &, FIN, net_tcp_seq_cmp(th_seq(th) + len, conn->ack) == 0)) {  in tcp_in()
2820 		if (th) {  in tcp_in()
2827 			if (tcp_compute_new_length(conn, th, len, false) > 0) {  in tcp_in()
2843 			if (FL(&fl, &, FIN, net_tcp_seq_cmp(th_seq(th) + len, conn->ack) == 0)) {  in tcp_in()
2861 		if (th) {  in tcp_in()
2870 			int32_t new_len = tcp_compute_new_length(conn, th, len, true);  in tcp_in()
2886 			if (FL(&fl, &, ACK, th_ack(th) == conn->seq)) {  in tcp_in()
2904 				net_tcp_seq_cmp(th_seq(th) + len + 1, conn->ack) == 0)) ||  in tcp_in()
2921 		if (th) {  in tcp_in()
2922 			int32_t new_len = tcp_compute_new_length(conn, th, len, true);  in tcp_in()
2943 					net_tcp_seq_cmp(th_seq(th) + 1, conn->ack) == 0)) ||  in tcp_in()
2966 		th = NULL;  in tcp_in()
3509 	struct tcphdr *th = th_get(pkt);  in tcp_input()  local
3512 	if (th) {  in tcp_input()
3515 		if (conn == NULL && SYN == th_flags(th)) {  in tcp_input()