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
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