net/atm/lec_arpc.h

   1 /*
   2  * Lec arp cache
   3  *
   4  * Marko Kiiskila <mkiiskila@yahoo.com>
   5  */
   6 #ifndef _LEC_ARP_H_
   7 #define _LEC_ARP_H_
   8 #include <linux/atm.h>
   9 #include <linux/atmdev.h>
  10 #include <linux/if_ether.h>
  11 #include <linux/atmlec.h>
  12
  13 struct lec_arp_table {
  14         struct hlist_node next;         /* Linked entry list */
  15         unsigned char atm_addr[ATM_ESA_LEN];    /* Atm address */
  16         unsigned char mac_addr[ETH_ALEN];       /* Mac address */
  17         int is_rdesc;                   /* Mac address is a route descriptor */
  18         struct atm_vcc *vcc;            /* Vcc this entry is attached */
  19         struct atm_vcc *recv_vcc;       /* Vcc we receive data from */
  20
  21         void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb);
  22                                         /* Push that leads to daemon */
  23
  24         void (*old_recv_push) (struct atm_vcc *vcc, struct sk_buff *skb);
  25                                         /* Push that leads to daemon */
  26
  27         void (*old_close) (struct atm_vcc *vcc);
  28                                         /* We want to see when this vcc gets closed */
  29
  30         unsigned long last_used;        /* For expiry */
  31         unsigned long timestamp;        /* Used for various timestamping things:
  32                                          * 1. FLUSH started
  33                                          *    (status=ESI_FLUSH_PENDING)
  34                                          * 2. Counting to
  35                                          *    max_unknown_frame_time
  36                                          *    (status=ESI_ARP_PENDING||
  37                                          *     status=ESI_VC_PENDING)
  38                                          */
  39         unsigned char no_tries;         /* No of times arp retry has been tried */
  40         unsigned char status;           /* Status of this entry */
  41         unsigned short flags;           /* Flags for this entry */
  42         unsigned short packets_flooded; /* Data packets flooded */
  43         unsigned long flush_tran_id;    /* Transaction id in flush protocol */
  44         struct timer_list timer;        /* Arping timer */
  45         struct lec_priv *priv;          /* Pointer back */
  46         u8 *tlvs;
  47         u32 sizeoftlvs;                 /*
  48                                          * LANE2: Each MAC address can have TLVs
  49                                          * associated with it.  sizeoftlvs tells the
  50                                          * the length of the tlvs array
  51                                          */
  52         struct sk_buff_head tx_wait;    /* wait queue for outgoing packets */
  53 };
  54
  55 /*
  56  * LANE2: Template tlv struct for accessing
  57  * the tlvs in the lec_arp_table->tlvs array
  58  */
  59 struct tlv {
  60         u32 type;
  61         u8 length;
  62         u8 value[255];
  63 };
  64
  65 /* Status fields */
  66 #define ESI_UNKNOWN 0           /*
  67                                  * Next packet sent to this mac address
  68                                  * causes ARP-request to be sent
  69                                  */
  70 #define ESI_ARP_PENDING 1       /*
  71                                  * There is no ATM address associated with this
  72                                  * 48-bit address.  The LE-ARP protocol is in
  73                                  * progress.
  74                                  */
  75 #define ESI_VC_PENDING 2        /*
  76                                  * There is a valid ATM address associated with
  77                                  * this 48-bit address but there is no VC set
  78                                  * up to that ATM address.  The signaling
  79                                  * protocol is in process.
  80                                  */
  81 #define ESI_FLUSH_PENDING 4     /*
  82                                  * The LEC has been notified of the FLUSH_START
  83                                  * status and it is assumed that the flush
  84                                  * protocol is in process.
  85                                  */
  86 #define ESI_FORWARD_DIRECT 5    /*
  87                                  * Either the Path Switching Delay (C22) has
  88                                  * elapsed or the LEC has notified the Mapping
  89                                  * that the flush protocol has completed.  In
  90                                  * either case, it is safe to forward packets
  91                                  * to this address via the data direct VC.
  92                                  */
  93
  94 /* Flag values */
  95 #define LEC_REMOTE_FLAG      0x0001
  96 #define LEC_PERMANENT_FLAG   0x0002
  97
  98 #endif /* _LEC_ARP_H_ */