net/tcp: put connection specific data into a tcp_stream structure

no functional changes

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Reviewed-by: Simon Glass <sjg@chromium.org>

net/net.c

@@ -416,7 +416,7 @@ int net_init(void)
 		/* Only need to setup buffer pointers once. */
 		first_call = 0;
 		if (IS_ENABLED(CONFIG_PROT_TCP))
-			tcp_set_tcp_state(TCP_CLOSED);
+			tcp_set_tcp_state(tcp_stream_get(), TCP_CLOSED);
 	}
 
 	return net_init_loop();
@@ -935,6 +935,9 @@ int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
 	uchar *pkt;
 	int eth_hdr_size;
 	int pkt_hdr_size;
+#if defined(CONFIG_PROT_TCP)
+	struct tcp_stream *tcp;
+#endif
 
 	/* make sure the net_tx_packet is initialized (net_init() was called) */
 	assert(net_tx_packet != NULL);
@@ -961,8 +964,12 @@ int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
 		break;
 #if defined(CONFIG_PROT_TCP)
 	case IPPROTO_TCP:
+		tcp = tcp_stream_get();
+		if (!tcp)
+			return -EINVAL;
+
 		pkt_hdr_size = eth_hdr_size
-			+ tcp_set_tcp_header(pkt + eth_hdr_size, dport, sport,
+			+ tcp_set_tcp_header(tcp, pkt + eth_hdr_size, dport, sport,
 					     payload_len, action, tcp_seq_num,
 					     tcp_ack_num);
 		break;