LXR linux-bk/net/atm/lec

   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
  13struct 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
  52struct 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 */
  93void lec_arp_init(struct lec_priv *priv);
  94int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
  95void lec_arp_destroy(struct lec_priv *priv);
  96void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
  97
  98struct 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);
 102void 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));
 105void lec_arp_check_empties(struct lec_priv *priv,
 106                           struct atm_vcc *vcc, struct sk_buff *skb);
 107int lec_addr_delete(struct lec_priv *priv,
 108                    unsigned char *mac_addr, unsigned long permanent);
 109void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
 110void 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);
 113void lec_set_flush_tran_id(struct lec_priv *priv,
 114                           unsigned char *mac_addr, unsigned long tran_id);
 115
 116#endif
 117