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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#ifndef _INET_TCP_SACK_H
#define _INET_TCP_SACK_H
#ifdef __cplusplus
extern "C" {
#endif
/* Maximum num of receiver's SACK blocks */
#define MAX_SACK_BLK 5
/* Receiver's SACK blk structure */
typedef struct sack_blk
{
tcp_seq begin;
tcp_seq end;
} sack_blk_t;
/* Sender's notsack'ed blk structure */
typedef struct notsack_blk
{
struct notsack_blk *next;
tcp_seq begin;
tcp_seq end;
uint32_t sack_cnt; /* Dup SACK count */
} notsack_blk_t;
/* SACK information in the tcp_t structure. */
typedef struct
{
int32_t tcp_pipe; /* # of bytes in network */
tcp_seq tcp_fack; /* highest sack'ed seq num */
tcp_seq tcp_sack_snxt; /* next seq num to be rexmited using SACK. */
int32_t tcp_max_sack_blk; /* max # of SACK info blk in a segment */
int32_t tcp_num_sack_blk; /* num of blks in sack list */
sack_blk_t tcp_sack_list[MAX_SACK_BLK]; /* the sack list */
/* num of blks in notsack list */
int32_t tcp_num_notsack_blk;
/* # of bytes represented in blks in notsack list */
uint32_t tcp_cnt_notsack_list;
/* the notsack list */
notsack_blk_t *tcp_notsack_list;
} tcp_sack_info_t;
extern void tcp_sack_insert(sack_blk_t *, tcp_seq, tcp_seq, int32_t *);
extern void tcp_sack_remove(sack_blk_t *, tcp_seq, int32_t *);
extern void tcp_notsack_insert(notsack_blk_t **, tcp_seq, tcp_seq,
int32_t *, uint32_t *);
extern void tcp_notsack_remove(notsack_blk_t **, tcp_seq, int32_t *,
uint32_t *);
extern void tcp_notsack_update(notsack_blk_t **, tcp_seq, tcp_seq,
int32_t *, uint32_t *);
/* Defined in tcp_sack.c */
extern kmem_cache_t *tcp_notsack_blk_cache;
/*
* Macro to remove all the notsack'ed blks in sender.
*
* Param:
* notsack_blk_t *head: pointer to the head of the list of notsack'ed blks.
*/
#define TCP_NOTSACK_REMOVE_ALL(head, tcp) \
{ \
if ((head) != NULL) { \
notsack_blk_t *prev, *tmp; \
tmp = (head); \
do { \
prev = tmp; \
tmp = tmp->next; \
kmem_cache_free(tcp_notsack_blk_cache, prev); \
} while (tmp != NULL); \
(head) = NULL; \
(tcp)->tcp_cnt_notsack_list = 0; \
(tcp)->tcp_num_notsack_blk = 0; \
} else { \
ASSERT((tcp)->tcp_cnt_notsack_list == 0); \
ASSERT((tcp)->tcp_num_notsack_blk == 0); \
} \
}
#ifdef __cplusplus
}
#endif
#endif /* _INET_TCP_SACK_H */
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