epoc32/include/libc/netinet/tcp_seq.h
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:33:34 +0100
branchSymbian3
changeset 4 837f303aceeb
parent 2 2fe1408b6811
permissions -rw-r--r--
Current Symbian^3 public API header files (from PDK 3.0.h)
This is the epoc32/include tree with the "platform" subtrees removed, and
all but a selected few mbg and rsg files removed.
     1 /* TCP_SEQ.H
     2  * Portions Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies).
     3  * All rights reserved.
     4  */
     5 
     6 /*
     7  * Copyright (c) 1982, 1986 Regents of the University of California.
     8  * All rights reserved.  The Berkeley software License Agreement
     9  * specifies the terms and conditions for redistribution.
    10  */
    11 
    12 /** @file
    13 @publishedAll
    14 @released
    15 */
    16 
    17 #ifndef	_NETINET_TCP_SEQ_H
    18 #define	_NETINET_TCP_SEQ_H
    19 
    20 #ifdef	__cplusplus
    21 extern "C" {
    22 #endif
    23 
    24 /**
    25 TCP sequence numbers are 32 bit integers operated
    26 on with modular arithmetic.  These macros can be
    27 used to compare such integers.
    28 */
    29 #define	SEQ_LT(a, b)	((int)((a)-(b)) < 0)
    30 #define	SEQ_LEQ(a, b)	((int)((a)-(b)) <= 0)
    31 #define	SEQ_GT(a, b)	((int)((a)-(b)) > 0)
    32 #define	SEQ_GEQ(a, b)	((int)((a)-(b)) >= 0)
    33 
    34 /**
    35 Macros to initialize tcp sequence numbers for
    36 send and receive from initial send and receive
    37 sequence numbers.
    38 */
    39 #define	tcp_rcvseqinit(tp) \
    40 	(tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
    41 
    42 #define	tcp_sendseqinit(tp) \
    43 	(tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
    44 	    (tp)->iss
    45 
    46 #define	TCP_ISSINCR	(125*1024)	/* increment for tcp_iss each second */
    47 
    48 #ifdef	__cplusplus
    49 }
    50 #endif
    51 
    52 #endif	/* _NETINET_TCP_SEQ_H */