Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6.git] / 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         unsigned long last_used;        /* For expiry */
28         unsigned long timestamp;        /* Used for various timestamping things:
29                                          * 1. FLUSH started
30                                          *    (status=ESI_FLUSH_PENDING)
31                                          * 2. Counting to
32                                          *    max_unknown_frame_time
33                                          *    (status=ESI_ARP_PENDING||
34                                          *     status=ESI_VC_PENDING)
35                                          */
36         unsigned char no_tries;         /* No of times arp retry has been tried */
37         unsigned char status;           /* Status of this entry */
38         unsigned short flags;           /* Flags for this entry */
39         unsigned short packets_flooded; /* Data packets flooded */
40         unsigned long flush_tran_id;    /* Transaction id in flush protocol */
41         struct timer_list timer;        /* Arping timer */
42         struct lec_priv *priv;          /* Pointer back */
43         u8 *tlvs;
44         u32 sizeoftlvs;                 /*
45                                          * LANE2: Each MAC address can have TLVs
46                                          * associated with it.  sizeoftlvs tells the
47                                          * the length of the tlvs array
48                                          */
49         struct sk_buff_head tx_wait;    /* wait queue for outgoing packets */
50         atomic_t usage;                 /* usage count */
51 };
52
53 /*
54  * LANE2: Template tlv struct for accessing
55  * the tlvs in the lec_arp_table->tlvs array
56  */
57 struct tlv {
58         u32 type;
59         u8 length;
60         u8 value[255];
61 };
62
63 /* Status fields */
64 #define ESI_UNKNOWN 0           /*
65                                  * Next packet sent to this mac address
66                                  * causes ARP-request to be sent
67                                  */
68 #define ESI_ARP_PENDING 1       /*
69                                  * There is no ATM address associated with this
70                                  * 48-bit address.  The LE-ARP protocol is in
71                                  * progress.
72                                  */
73 #define ESI_VC_PENDING 2        /*
74                                  * There is a valid ATM address associated with
75                                  * this 48-bit address but there is no VC set
76                                  * up to that ATM address.  The signaling
77                                  * protocol is in process.
78                                  */
79 #define ESI_FLUSH_PENDING 4     /*
80                                  * The LEC has been notified of the FLUSH_START
81                                  * status and it is assumed that the flush
82                                  * protocol is in process.
83                                  */
84 #define ESI_FORWARD_DIRECT 5    /*
85                                  * Either the Path Switching Delay (C22) has
86                                  * elapsed or the LEC has notified the Mapping
87                                  * that the flush protocol has completed.  In
88                                  * either case, it is safe to forward packets
89                                  * to this address via the data direct VC.
90                                  */
91
92 /* Flag values */
93 #define LEC_REMOTE_FLAG      0x0001
94 #define LEC_PERMANENT_FLAG   0x0002
95
96 #endif /* _LEC_ARP_H_ */