include/net/llc_main.h

   1 #ifndef LLC_MAIN_H
   2 #define LLC_MAIN_H
   3 /*
   4  * Copyright (c) 1997 by Procom Technology, Inc.
   5  *               2001 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
   6  *
   7  * This program can be redistributed or modified under the terms of the
   8  * GNU General Public License as published by the Free Software Foundation.
   9  * This program is distributed without any warranty or implied warranty
  10  * of merchantability or fitness for a particular purpose.
  11  *
  12  * See the GNU General Public License for more details.
  13  */
  14 #define LLC_EVENT                1
  15 #define LLC_PACKET               2
  16 #define LLC_TYPE_1               1
  17 #define LLC_TYPE_2               2
  18 #define LLC_P_TIME               2
  19 #define LLC_ACK_TIME             1
  20 #define LLC_REJ_TIME             3
  21 #define LLC_BUSY_TIME            3
  22 #define LLC_DEST_INVALID         0      /* Invalid LLC PDU type */
  23 #define LLC_DEST_SAP             1      /* Type 1 goes here */
  24 #define LLC_DEST_CONN            2      /* Type 2 goes here */
  25
  26 /**
  27  * struct llc_station - LLC station component
  28  *
  29  * SAP and connection resource manager, one per adapter.
  30  *
  31  * @state - state of station
  32  * @xid_r_count - XID response PDU counter
  33  * @mac_sa - MAC source address
  34  * @sap_list - list of related SAPs
  35  * @ev_q - events entering state mach.
  36  * @mac_pdu_q - PDUs ready to send to MAC
  37  */
  38 struct llc_station {
  39         u8                          state;
  40         u8                          xid_r_count;
  41         struct timer_list           ack_timer;
  42         u8                          retry_count;
  43         u8                          maximum_retry;
  44         u8                          mac_sa[6];
  45         struct {
  46                 rwlock_t            lock;
  47                 struct list_head    list;
  48         } sap_list;
  49         struct {
  50                 struct sk_buff_head list;
  51                 spinlock_t          lock;
  52         } ev_q;
  53         struct sk_buff_head         mac_pdu_q;
  54 };
  55
  56 extern struct llc_sap *llc_sap_alloc(void);
  57 extern void llc_sap_save(struct llc_sap *sap);
  58 extern void llc_free_sap(struct llc_sap *sap);
  59 extern struct llc_sap *llc_sap_find(u8 lsap);
  60 extern void llc_station_state_process(struct llc_station *station,
  61                                       struct sk_buff *skb);
  62 extern void llc_station_send_pdu(struct llc_station *station,
  63                                  struct sk_buff *skb);
  64 extern struct sk_buff *llc_alloc_frame(void);
  65
  66 extern struct llc_station llc_main_station;
  67 #endif /* LLC_MAIN_H */