1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #ifndef _INET_TCP_SACK_H 26 #define _INET_TCP_SACK_H 27 28 #ifdef __cplusplus 29 extern "C" { 30 #endif 31 32 /* Maximum num of receiver's SACK blocks */ 33 #define MAX_SACK_BLK 5 34 35 /* Receiver's SACK blk structure */ 36 typedef struct sack_blk 37 { 38 tcp_seq begin; 39 tcp_seq end; 40 } sack_blk_t; 41 42 /* Sender's notsack'ed blk structure */ 43 typedef struct notsack_blk 44 { 45 struct notsack_blk *next; 46 tcp_seq begin; 47 tcp_seq end; 48 uint32_t sack_cnt; /* Dup SACK count */ 49 } notsack_blk_t; 50 51 52 /* SACK information in the tcp_t structure. */ 53 typedef struct 54 { 55 int32_t tcp_pipe; /* # of bytes in network */ 56 tcp_seq tcp_fack; /* highest sack'ed seq num */ 57 tcp_seq tcp_sack_snxt; /* next seq num to be rexmited using SACK. */ 58 59 int32_t tcp_max_sack_blk; /* max # of SACK info blk in a segment */ 60 int32_t tcp_num_sack_blk; /* num of blks in sack list */ 61 sack_blk_t tcp_sack_list[MAX_SACK_BLK]; /* the sack list */ 62 63 /* num of blks in notsack list */ 64 int32_t tcp_num_notsack_blk; 65 /* # of bytes represented in blks in notsack list */ 66 uint32_t tcp_cnt_notsack_list; 67 /* the notsack list */ 68 notsack_blk_t *tcp_notsack_list; 69 } tcp_sack_info_t; 70 71 extern void tcp_sack_insert(sack_blk_t *, tcp_seq, tcp_seq, int32_t *); 72 extern void tcp_sack_remove(sack_blk_t *, tcp_seq, int32_t *); 73 extern void tcp_notsack_insert(notsack_blk_t **, tcp_seq, tcp_seq, 74 int32_t *, uint32_t *); 75 extern void tcp_notsack_remove(notsack_blk_t **, tcp_seq, int32_t *, 76 uint32_t *); 77 extern void tcp_notsack_update(notsack_blk_t **, tcp_seq, tcp_seq, 78 int32_t *, uint32_t *); 79 80 /* Defined in tcp_sack.c */ 81 extern kmem_cache_t *tcp_notsack_blk_cache; 82 83 /* 84 * Macro to remove all the notsack'ed blks in sender. 85 * 86 * Param: 87 * notsack_blk_t *head: pointer to the head of the list of notsack'ed blks. 88 */ 89 #define TCP_NOTSACK_REMOVE_ALL(head, tcp) \ 90 { \ 91 if ((head) != NULL) { \ 92 notsack_blk_t *prev, *tmp; \ 93 tmp = (head); \ 94 do { \ 95 prev = tmp; \ 96 tmp = tmp->next; \ 97 kmem_cache_free(tcp_notsack_blk_cache, prev); \ 98 } while (tmp != NULL); \ 99 (head) = NULL; \ 100 (tcp)->tcp_cnt_notsack_list = 0; \ 101 (tcp)->tcp_num_notsack_blk = 0; \ 102 } else { \ 103 ASSERT((tcp)->tcp_cnt_notsack_list == 0); \ 104 ASSERT((tcp)->tcp_num_notsack_blk == 0); \ 105 } \ 106 } 107 108 #ifdef __cplusplus 109 } 110 #endif 111 112 #endif /* _INET_TCP_SACK_H */ 113