net/atm/lec_arpc.h

   1 /*
   2  * Lec arp cache
   3  * Marko Kiiskila mkiiskila@yahoo.com
   4  *
   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 lec_arp_table *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         void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
  21                                              /* Push that leads to daemon */
  22         void (*old_recv_push)(struct atm_vcc *vcc, struct sk_buff *skb);
  23                                              /* Push that leads to daemon */
  24         void (*old_close)(struct atm_vcc *vcc);
  25                                              /* We want to see when this
  26                                               * vcc gets closed */
  27         unsigned long last_used;             /* For expiry */
  28         unsigned long timestamp;             /* Used for various timestamping
  29                                               * things:
  30                                               * 1. FLUSH started
  31                                               *    (status=ESI_FLUSH_PENDING)
  32                                               * 2. Counting to
  33                                               *    max_unknown_frame_time
  34                                               *    (status=ESI_ARP_PENDING||
  35                                               *     status=ESI_VC_PENDING)
  36                                               */
  37         unsigned char no_tries;              /* No of times arp retry has been
  38                                                 tried */
  39         unsigned char status;                /* Status of this entry */
  40         unsigned short flags;                /* Flags for this entry */
  41         unsigned short packets_flooded;      /* Data packets flooded */
  42         unsigned long flush_tran_id;         /* Transaction id in flush protocol */
  43         struct timer_list timer;             /* Arping timer */
  44         struct lec_priv *priv;               /* Pointer back */
  45
  46         u8  *tlvs;             /* LANE2: Each MAC address can have TLVs    */
  47         u32 sizeoftlvs;        /* associated with it. sizeoftlvs tells the */
  48                                /* the length of the tlvs array             */
  49         struct sk_buff_head tx_wait; /* wait queue for outgoing packets    */
  50 };
  51
  52 struct tlv {                   /* LANE2: Template tlv struct for accessing */
  53                                /* the tlvs in the lec_arp_table->tlvs array*/
  54         u32 type;
  55         u8  length;
  56         u8  value[255];
  57 };
  58
  59 /* Status fields */
  60 #define ESI_UNKNOWN 0       /*
  61                              * Next packet sent to this mac address
  62                              * causes ARP-request to be sent
  63                              */
  64 #define ESI_ARP_PENDING 1   /*
  65                              * There is no ATM address associated with this
  66                              * 48-bit address.  The LE-ARP protocol is in
  67                              * progress.
  68                              */
  69 #define ESI_VC_PENDING 2    /*
  70                              * There is a valid ATM address associated with
  71                              * this 48-bit address but there is no VC set
  72                              * up to that ATM address.  The signaling
  73                              * protocol is in process.
  74                              */
  75 #define ESI_FLUSH_PENDING 4 /*
  76                              * The LEC has been notified of the FLUSH_START
  77                              * status and it is assumed that the flush
  78                              * protocol is in process.
  79                              */
  80 #define ESI_FORWARD_DIRECT 5 /*
  81                               * Either the Path Switching Delay (C22) has
  82                               * elapsed or the LEC has notified the Mapping
  83                               * that the flush protocol has completed.  In
  84                               * either case, it is safe to forward packets
  85                               * to this address via the data direct VC.
  86                               */
  87
  88 /* Flag values */
  89 #define LEC_REMOTE_FLAG      0x0001
  90 #define LEC_PERMANENT_FLAG   0x0002
  91
  92 /* Protos */
  93 void lec_arp_init(struct lec_priv *priv);
  94 int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
  95 void lec_arp_destroy(struct lec_priv *priv);
  96 void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
  97
  98 struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
  99                                 unsigned char *mac_to_addr,
 100                                 int is_rdesc,
 101                                 struct lec_arp_table **ret_entry);
 102 void lec_vcc_added(struct lec_priv *dev,
 103                    struct atmlec_ioc *ioc_data, struct atm_vcc *vcc,
 104                    void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb));
 105 void lec_arp_check_empties(struct lec_priv *priv,
 106                            struct atm_vcc *vcc, struct sk_buff *skb);
 107 int lec_addr_delete(struct lec_priv *priv,
 108                     unsigned char *mac_addr, unsigned long permanent);
 109 void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
 110 void lec_arp_update(struct lec_priv *priv,
 111                     unsigned char *mac_addr, unsigned char *atm_addr,
 112                     unsigned long remoteflag, unsigned int targetless_le_arp);
 113 void lec_set_flush_tran_id(struct lec_priv *priv,
 114                            unsigned char *mac_addr, unsigned long tran_id);
 115
 116 #endif