projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b | 1 | /* |
| 5d5c5d0d A |
2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| 3 | * | |
| 2d21ac55 | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| 1c79356b | 5 | * |
| 2d21ac55 A |
6 | * This file contains Original Code and/or Modifications of Original Code |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. The rights granted to you under the License | |
| 10 | * may not be used to create, or enable the creation or redistribution of, | |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any | |
| 13 | * terms of an Apple operating system software license agreement. | |
| 8f6c56a5 | 14 | * |
| 2d21ac55 A |
15 | * Please obtain a copy of the License at |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 17 | * | |
| 18 | * The Original Code and all software distributed under the License are | |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 8f6c56a5 A |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 2d21ac55 A |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 23 | * Please see the License for the specific language governing rights and | |
| 24 | * limitations under the License. | |
| 8f6c56a5 | 25 | * |
| 2d21ac55 | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| 1c79356b A |
27 | */ |
| 28 | ||
| 29 | /* | |
| 30 | * Copyright (c) 1988, 1989 Apple Computer, Inc. | |
| 31 | */ | |
| 32 | ||
| 33 | #ifndef _NETAT_AT_DDP_BRT_H_ | |
| 34 | #define _NETAT_AT_DDP_BRT_H_ | |
| 9bccf70c | 35 | #include <sys/appleapiopts.h> |
| 91447636 A |
36 | #ifdef KERNEL_PRIVATE |
| 37 | #ifdef __APPLE_API_OBSOLETE | |
| 1c79356b A |
38 | |
| 39 | typedef struct { | |
| 40 | int age_flag; | |
| 41 | at_ifaddr_t *ifID; | |
| 42 | struct etalk_addr et_addr; | |
| 43 | at_net_al net; | |
| 44 | } ddp_brt_t; | |
| 45 | ||
| 46 | #define BRT_SWEEP_INT (10 * PR_SLOWHZ) | |
| 47 | #define BRT_BSIZ 4 /* bucket size */ | |
| 48 | #define BRT_NB 16 /* number of buckets */ | |
| 49 | #define BRTSIZE (BRT_BSIZ * BRT_NB) | |
| 50 | ||
| 51 | /* age_flag values */ | |
| 52 | #define BRT_EMPTY 0 /* the BRT entry is empty */ | |
| 53 | /* (or aged out). */ | |
| 54 | #define BRT_VALID 1 /* BRT entry contains valid */ | |
| 55 | /* tuple */ | |
| 56 | #define BRT_GETTING_OLD 2 /* BRT entry is a candidate */ | |
| 57 | /* for aging */ | |
| 58 | ||
| 59 | #define BRT_HASH(a) ((a) % BRT_NB) | |
| 60 | ||
| 61 | #define BRT_LOOK(brt, dst_net) { \ | |
| 2d21ac55 | 62 | int n; \ |
| 1c79356b A |
63 | brt = &at_ddp_brt[BRT_HASH(dst_net) * BRT_BSIZ]; \ |
| 64 | for (n = 0 ; ; brt++) { \ | |
| 65 | if (brt->net == dst_net) \ | |
| 66 | break; \ | |
| 67 | if (++n >= BRT_BSIZ) { \ | |
| 68 | brt = NULL; \ | |
| 69 | break; \ | |
| 70 | } \ | |
| 71 | } \ | |
| 72 | } | |
| 73 | ||
| 74 | #define NEW_BRT(brt, net) { \ | |
| 2d21ac55 | 75 | int n; \ |
| 1c79356b A |
76 | brt = &at_ddp_brt[BRT_HASH(net) * BRT_BSIZ]; \ |
| 77 | for (n = 0 ; ; brt++) { \ | |
| 78 | if (brt->age_flag == BRT_EMPTY) \ | |
| 79 | break; \ | |
| 80 | if (++n >= BRT_BSIZ) { \ | |
| 81 | brt = NULL; \ | |
| 82 | break; \ | |
| 83 | } \ | |
| 84 | } \ | |
| 85 | } | |
| 86 | ||
| 87 | /* Best Router Cache */ | |
| 88 | extern ddp_brt_t at_ddp_brt[BRTSIZE]; | |
| 89 | ||
| 91447636 A |
90 | #endif /* __APPLE_API_OBSOLETE */ |
| 91 | #endif /* KERNEL_PRIVATE */ | |
| 1c79356b A |
92 | #endif /* _NETAT_AT_DDP_BRT_H_ */ |
| 93 |