--- a/epoc32/include/libc/netinet/tcp_seq.h	Tue Nov 24 13:55:44 2009 +0000
+++ b/epoc32/include/libc/netinet/tcp_seq.h	Tue Mar 16 16:12:26 2010 +0000
@@ -1,1 +1,52 @@
-tcp_seq.h
+/* TCP_SEQ.H
+ * 
+ * Portions copyright (c) 1997-1999 Symbian Ltd.  All rights reserved.
+ */
+
+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ */
+
+/** @file
+@publishedAll
+@released
+*/
+
+#ifndef	_NETINET_TCP_SEQ_H
+#define	_NETINET_TCP_SEQ_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/**
+TCP sequence numbers are 32 bit integers operated
+on with modular arithmetic.  These macros can be
+used to compare such integers.
+*/
+#define	SEQ_LT(a, b)	((int)((a)-(b)) < 0)
+#define	SEQ_LEQ(a, b)	((int)((a)-(b)) <= 0)
+#define	SEQ_GT(a, b)	((int)((a)-(b)) > 0)
+#define	SEQ_GEQ(a, b)	((int)((a)-(b)) >= 0)
+
+/**
+Macros to initialize tcp sequence numbers for
+send and receive from initial send and receive
+sequence numbers.
+*/
+#define	tcp_rcvseqinit(tp) \
+	(tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
+
+#define	tcp_sendseqinit(tp) \
+	(tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
+	    (tp)->iss
+
+#define	TCP_ISSINCR	(125*1024)	/* increment for tcp_iss each second */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _NETINET_TCP_SEQ_H */