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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_ */ |
97 |
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