xnu-792.21.3.tar.gz

[apple/xnu.git] / bsd / netinet / tcp_seq.h

diff --git a/bsd/netinet/tcp_seq.h b/bsd/netinet/tcp_seq.h
index 032cff92071f727745b5c335a1de5891c008d322..e4f781b33872fe367e52125a88b1a84a62b3f79b 100644 (file)
--- a/bsd/netinet/tcp_seq.h
+++ b/bsd/netinet/tcp_seq.h
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * Copyright (c) 1982, 1986, 1993, 1995
@@ -52,10 +58,12 @@
  * SUCH DAMAGE.
  *
  *     @(#)tcp_seq.h   8.3 (Berkeley) 6/21/95
+ * $FreeBSD: src/sys/netinet/tcp_seq.h,v 1.11.2.5 2001/08/22 00:59:12 silby Exp $
  */
 
 #ifndef _NETINET_TCP_SEQ_H_
 #define _NETINET_TCP_SEQ_H_
+#include <sys/appleapiopts.h>
 /*
  * TCP sequence numbers are 32 bit integers operated
  * on with modular arithmetic.  These macros can be
@@ -66,6 +74,9 @@
 #define        SEQ_GT(a,b)     ((int)((a)-(b)) > 0)
 #define        SEQ_GEQ(a,b)    ((int)((a)-(b)) >= 0)
 
+#define        SEQ_MIN(a, b)   ((SEQ_LT(a, b)) ? (a) : (b))
+#define        SEQ_MAX(a, b)   ((SEQ_GT(a, b)) ? (a) : (b))
+
 /* for modulo comparisons of timestamps */
 #define TSTMP_LT(a,b)  ((int)((a)-(b)) < 0)
 #define TSTMP_GEQ(a,b) ((int)((a)-(b)) >= 0)
@@ -83,6 +94,7 @@
 /* Macro to increment a CC: skip 0 which has a special meaning */
 #define CC_INC(c)      (++(c) == 0 ? ++(c) : (c))
 
+#ifdef KERNEL_PRIVATE
 /*
  * Macros to initialize tcp sequence numbers for
  * send and receive from initial send and receive
@@ -93,30 +105,11 @@
 
 #define        tcp_sendseqinit(tp) \
        (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \
-           (tp)->iss
+       (tp)->snd_recover = (tp)->snd_high = (tp)->iss  
 
 #define TCP_PAWS_IDLE  (24 * 24 * 60 * 60 * PR_SLOWHZ)
                                        /* timestamp wrap-around time */
 
-#ifdef KERNEL
 extern tcp_cc  tcp_ccgen;              /* global connection count */
-
-/*
- * Increment for tcp_iss each second.
- * This is designed to increment at the standard 250 KB/s,
- * but with a random component averaging 128 KB.
- * We also increment tcp_iss by a quarter of this amount
- * each time we use the value for a new connection.
- * If defined, the tcp_random18() macro should produce a
- * number in the range [0-0x3ffff] that is hard to predict.
- */
-#ifndef tcp_random18
-#define        tcp_random18()  ((random() >> 14) & 0x3ffff)
-#endif
-#define        TCP_ISSINCR     (122*1024 + tcp_random18())
-
-extern tcp_seq tcp_iss;                /* tcp initial send seq # */
-#else
-#define        TCP_ISSINCR     (250*1024)      /* increment for tcp_iss each second */
-#endif /* KERNEL */
+#endif KERNEL_PRIVATE
 #endif /* _NETINET_TCP_SEQ_H_ */