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sba.h
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1 /******************************************************************************
2  *
3  * (C)Copyright 1998,1999 SysKonnect,
4  * a business unit of Schneider & Koch & Co. Datensysteme GmbH.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * The information in this file is provided "AS IS" without warranty.
12  *
13  ******************************************************************************/
14 
15 /*
16  * Synchronous Bandwidth Allocation (SBA) structs
17  */
18 
19 #ifndef _SBA_
20 #define _SBA_
21 
22 #include "mbuf.h"
23 #include "sba_def.h"
24 
25 #ifdef SBA
26 
27 /* Timer Cell Template */
28 struct timer_cell {
29  struct timer_cell *next_ptr ;
30  struct timer_cell *prev_ptr ;
31  u_long start_time ;
32  struct s_sba_node_vars *node_var ;
33 } ;
34 
35 /*
36  * Node variables
37  */
38 struct s_sba_node_vars {
39  u_char change_resp_flag ;
40  u_char report_resp_flag ;
41  u_char change_req_flag ;
42  u_char report_req_flag ;
43  long change_amount ;
44  long node_overhead ;
45  long node_payload ;
46  u_long node_status ;
47  u_char deallocate_status ;
48  u_char timer_state ;
49  u_short report_cnt ;
50  long lastrep_req_tranid ;
51  struct fddi_addr mac_address ;
52  struct s_sba_sessions *node_sessions ;
53  struct timer_cell timer ;
54 } ;
55 
56 /*
57  * Session variables
58  */
59 struct s_sba_sessions {
60  u_long deallocate_status ;
61  long session_overhead ;
62  u_long min_segment_size ;
63  long session_payload ;
64  u_long session_status ;
65  u_long sba_category ;
66  long lastchg_req_tranid ;
67  u_short session_id ;
68  u_char class ;
69  u_char fddi2 ;
70  u_long max_t_neg ;
71  struct s_sba_sessions *next_session ;
72 } ;
73 
74 struct s_sba {
75 
76  struct s_sba_node_vars node[MAX_NODES] ;
77  struct s_sba_sessions session[MAX_SESSIONS] ;
78 
79  struct s_sba_sessions *free_session ; /* points to the first */
80  /* free session */
81 
82  struct timer_cell *tail_timer ; /* points to the last timer cell */
83 
84  /*
85  * variables for allocation actions
86  */
87  long total_payload ; /* Total Payload */
88  long total_overhead ; /* Total Overhead */
89  long sba_allocatable ; /* allocatable sync bandwidth */
90 
91  /*
92  * RAF message receive parameters
93  */
94  long msg_path_index ; /* Path Type */
95  long msg_sba_pl_req ; /* Payload Request */
96  long msg_sba_ov_req ; /* Overhead Request */
97  long msg_mib_pl ; /* Current Payload for this Path */
98  long msg_mib_ov ; /* Current Overhead for this Path*/
99  long msg_category ; /* Category of the Allocation */
100  u_long msg_max_t_neg ; /* longest T_Neg acceptable */
101  u_long msg_min_seg_siz ; /* minimum segement size */
102  struct smt_header *sm ; /* points to the rec message */
103  struct fddi_addr *msg_alloc_addr ; /* Allocation Address */
104 
105  /*
106  * SBA variables
107  */
108  u_long sba_t_neg ; /* holds the last T_NEG */
109  long sba_max_alloc ; /* the parsed value of SBAAvailable */
110 
111  /*
112  * SBA state machine variables
113  */
114  short sba_next_state ; /* the next state of the SBA */
115  char sba_command ; /* holds the execuded SBA cmd */
116  u_char sba_available ; /* parsed value after possible check */
117 } ;
118 
119 #endif /* SBA */
120 
121  /*
122  * variables for the End Station Support
123  */
124 struct s_ess {
125 
126  /*
127  * flags and counters
128  */
129  u_char sync_bw_available ; /* is set if sync bw is allocated */
130  u_char local_sba_active ; /* set when a local sba is available */
131  char raf_act_timer_poll ; /* activate the timer to send allc req */
132  char timer_count ; /* counts every timer function call */
133 
134  SMbuf *sba_reply_pend ; /* local reply for the sba is pending */
135 
136  /*
137  * variables for the ess bandwidth control
138  */
139  long sync_bw ; /* holds the allocaed sync bw */
140  u_long alloc_trans_id ; /* trans id of the last alloc req */
141 } ;
142 #endif
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