diff -Nur linux-2.6.11.10/include/linux/ip.h linux-2.6.11.10-zph/include/linux/ip.h
--- linux-2.6.11.10/include/linux/ip.h	2005-05-16 20:51:43.000000000 +0300
+++ linux-2.6.11.10-zph/include/linux/ip.h	2005-05-26 18:21:43.000000000 +0300
@@ -136,6 +136,7 @@
 	int			mc_index;	/* Multicast device index */
 	__u32			mc_addr;
 	struct ip_mc_socklist	*mc_list;	/* Group array */
+
 	/*
 	 * Following members are used to retain the infomation to build
 	 * an ip header on each ip fragmentation while the socket is corked.
@@ -149,6 +150,7 @@
 		u32			addr;
 		struct flowi		fl;
 	} cork;
+	__u8                    zph_tos; 	/* ZPH TOS received on connect */	
 };
 
 #define IPCORK_OPT	1	/* ip-options has been held in ipcork.opt */
diff -Nur linux-2.6.11.10/net/ipv4/ip_sockglue.c linux-2.6.11.10-zph/net/ipv4/ip_sockglue.c
--- linux-2.6.11.10/net/ipv4/ip_sockglue.c	2005-05-16 20:51:58.000000000 +0300
+++ linux-2.6.11.10-zph/net/ipv4/ip_sockglue.c	2005-05-26 18:21:55.000000000 +0300
@@ -1047,6 +1047,12 @@
 				int hlim = inet->mc_ttl;
 				put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim);
 			}
+
+			if (inet->cmsg_flags&IP_CMSG_TOS) {
+				int hlim = inet->zph_tos;
+				put_cmsg(&msg, SOL_IP, IP_TOS, sizeof(hlim), &hlim);
+			}
+
 			len -= msg.msg_controllen;
 			return put_user(len, optlen);
 		}
diff -Nur linux-2.6.11.10/net/ipv4/tcp_input.c linux-2.6.11.10-zph/net/ipv4/tcp_input.c
--- linux-2.6.11.10/net/ipv4/tcp_input.c	2005-05-16 20:52:00.000000000 +0300
+++ linux-2.6.11.10-zph/net/ipv4/tcp_input.c	2005-05-26 18:22:04.000000000 +0300
@@ -4452,6 +4452,7 @@
 					 struct tcphdr *th, unsigned len)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
+	struct inet_sock *inet = inet_sk(sk);
 	int saved_clamp = tp->rx_opt.mss_clamp;
 
 	tcp_parse_options(skb, &tp->rx_opt, 0);
@@ -4508,10 +4509,15 @@
 		 *    state to ESTABLISHED..."
 		 */
 
+
 		TCP_ECN_rcv_synack(tp, th);
 		if (tp->ecn_flags&TCP_ECN_OK)
 			sk->sk_no_largesend = 1;
 
+	    	/* ZPH, copy TOS field from the SYNACK packet to zph_tos field
+		 * of the af_inet member of sock structure */
+		inet->zph_tos = skb->nh.iph->tos; 
+
 		tp->snd_wl1 = TCP_SKB_CB(skb)->seq;
 		tcp_ack(sk, skb, FLAG_SLOWPATH);