1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Lec arp cache |
4 | * |
5 | * Marko Kiiskila <mkiiskila@yahoo.com> |
6 | */ |
7 | #ifndef _LEC_ARP_H_ |
8 | #define _LEC_ARP_H_ |
9 | #include <linux/atm.h> |
10 | #include <linux/atmdev.h> |
11 | #include <linux/if_ether.h> |
12 | #include <linux/atmlec.h> |
13 | |
14 | struct lec_arp_table { |
15 | struct hlist_node next; /* Linked entry list */ |
16 | unsigned char atm_addr[ATM_ESA_LEN]; /* Atm address */ |
17 | unsigned char mac_addr[ETH_ALEN]; /* Mac address */ |
18 | int is_rdesc; /* Mac address is a route descriptor */ |
19 | struct atm_vcc *vcc; /* Vcc this entry is attached */ |
20 | struct atm_vcc *recv_vcc; /* Vcc we receive data from */ |
21 | |
22 | void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb); |
23 | /* Push that leads to daemon */ |
24 | |
25 | void (*old_recv_push) (struct atm_vcc *vcc, struct sk_buff *skb); |
26 | /* Push that leads to daemon */ |
27 | |
28 | unsigned long last_used; /* For expiry */ |
29 | unsigned long timestamp; /* Used for various timestamping 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 tried */ |
38 | unsigned char status; /* Status of this entry */ |
39 | unsigned short flags; /* Flags for this entry */ |
40 | unsigned short packets_flooded; /* Data packets flooded */ |
41 | unsigned long flush_tran_id; /* Transaction id in flush protocol */ |
42 | struct timer_list timer; /* Arping timer */ |
43 | struct lec_priv *priv; /* Pointer back */ |
44 | u8 *tlvs; |
45 | u32 sizeoftlvs; /* |
46 | * LANE2: Each MAC address can have TLVs |
47 | * associated with it. sizeoftlvs tells |
48 | * the length of the tlvs array |
49 | */ |
50 | struct sk_buff_head tx_wait; /* wait queue for outgoing packets */ |
51 | refcount_t usage; /* usage count */ |
52 | }; |
53 | |
54 | /* |
55 | * LANE2: Template tlv struct for accessing |
56 | * the tlvs in the lec_arp_table->tlvs array |
57 | */ |
58 | struct tlv { |
59 | u32 type; |
60 | u8 length; |
61 | u8 value[255]; |
62 | }; |
63 | |
64 | /* Status fields */ |
65 | #define ESI_UNKNOWN 0 /* |
66 | * Next packet sent to this mac address |
67 | * causes ARP-request to be sent |
68 | */ |
69 | #define ESI_ARP_PENDING 1 /* |
70 | * There is no ATM address associated with this |
71 | * 48-bit address. The LE-ARP protocol is in |
72 | * progress. |
73 | */ |
74 | #define ESI_VC_PENDING 2 /* |
75 | * There is a valid ATM address associated with |
76 | * this 48-bit address but there is no VC set |
77 | * up to that ATM address. The signaling |
78 | * protocol is in process. |
79 | */ |
80 | #define ESI_FLUSH_PENDING 4 /* |
81 | * The LEC has been notified of the FLUSH_START |
82 | * status and it is assumed that the flush |
83 | * protocol is in process. |
84 | */ |
85 | #define ESI_FORWARD_DIRECT 5 /* |
86 | * Either the Path Switching Delay (C22) has |
87 | * elapsed or the LEC has notified the Mapping |
88 | * that the flush protocol has completed. In |
89 | * either case, it is safe to forward packets |
90 | * to this address via the data direct VC. |
91 | */ |
92 | |
93 | /* Flag values */ |
94 | #define LEC_REMOTE_FLAG 0x0001 |
95 | #define LEC_PERMANENT_FLAG 0x0002 |
96 | |
97 | #endif /* _LEC_ARP_H_ */ |
98 | |