1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
* Lan Emulation client header file
*
* Marko Kiiskila <mkiiskila@yahoo.com>
*/
#ifndef _LEC_H_
#define _LEC_H_
#include <linux/atmdev.h>
#include <linux/netdevice.h>
#include <linux/atmlec.h>
#define LEC_HEADER_LEN 16
struct lecdatahdr_8023 {
__be16 le_header;
unsigned char h_dest[ETH_ALEN];
unsigned char h_source[ETH_ALEN];
__be16 h_type;
};
struct lecdatahdr_8025 {
__be16 le_header;
unsigned char ac_pad;
unsigned char fc;
unsigned char h_dest[ETH_ALEN];
unsigned char h_source[ETH_ALEN];
};
#define LEC_MINIMUM_8023_SIZE 62
#define LEC_MINIMUM_8025_SIZE 16
/*
* Operations that LANE2 capable device can do. Two first functions
* are used to make the device do things. See spec 3.1.3 and 3.1.4.
*
* The third function is intented for the MPOA component sitting on
* top of the LANE device. The MPOA component assigns it's own function
* to (*associate_indicator)() and the LANE device will use that
* function to tell about TLVs it sees floating through.
*
*/
struct lane2_ops {
int (*resolve) (struct net_device *dev, u8 *dst_mac, int force,
u8 **tlvs, u32 *sizeoftlvs);
int (*associate_req) (struct net_device *dev, u8 *lan_dst,
u8 *tlvs, u32 sizeoftlvs);
void (*associate_indicator) (struct net_device *dev, u8 *mac_addr,
u8 *tlvs, u32 sizeoftlvs);
};
/*
* ATM LAN Emulation supports both LLC & Dix Ethernet EtherType
* frames.
*
* 1. Dix Ethernet EtherType frames encoded by placing EtherType
* field in h_type field. Data follows immediatelly after header.
* 2. LLC Data frames whose total length, including LLC field and data,
* but not padding required to meet the minimum data frame length,
* is less than 1536(0x0600) MUST be encoded by placing that length
* in the h_type field. The LLC field follows header immediatelly.
* 3. LLC data frames longer than this maximum MUST be encoded by placing
* the value 0 in the h_type field.
*
*/
/* Hash table size */
#define LEC_ARP_TABLE_SIZE 16
struct lec_priv {
struct net_device_stats stats;
unsigned short lecid; /* Lecid of this client */
struct hlist_head lec_arp_empty_ones;
/* Used for storing VCC's that don't have a MAC address attached yet */
struct hlist_head lec_arp_tables[LEC_ARP_TABLE_SIZE];
/* Actual LE ARP table */
struct hlist_head lec_no_forward;
/*
* Used for storing VCC's (and forward packets from) which are to
* age out by not using them to forward packets.
* This is because to some LE clients there will be 2 VCCs. Only
* one of them gets used.
*/
struct hlist_head mcast_fwds;
/*
* With LANEv2 it is possible that BUS (or a special multicast server)
* establishes multiple Multicast Forward VCCs to us. This list
* collects all those VCCs. LANEv1 client has only one item in this
* list. These entries are not aged out.
*/
spinlock_t lec_arp_lock;
struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */
struct atm_vcc *lecd;
struct delayed_work lec_arp_work; /* C10 */
unsigned int maximum_unknown_frame_count;
/*
* Within the period of time defined by this variable, the client will send
* no more than C10 frames to BUS for a given unicast destination. (C11)
*/
unsigned long max_unknown_frame_time;
/*
* If no traffic has been sent in this vcc for this period of time,
* vcc will be torn down (C12)
*/
unsigned long vcc_timeout_period;
/*
* An LE Client MUST not retry an LE_ARP_REQUEST for a
* given frame's LAN Destination more than maximum retry count times,
* after the first LEC_ARP_REQUEST (C13)
*/
unsigned short max_retry_count;
/*
* Max time the client will maintain an entry in its arp cache in
* absence of a verification of that relationship (C17)
*/
unsigned long aging_time;
/*
* Max time the client will maintain an entry in cache when
* topology change flag is true (C18)
*/
unsigned long forward_delay_time; /* Topology change flag (C19) */
int topology_change;
/*
* Max time the client expects an LE_ARP_REQUEST/LE_ARP_RESPONSE
* cycle to take (C20)
*/
unsigned long arp_response_time;
/*
* Time limit ot wait to receive an LE_FLUSH_RESPONSE after the
* LE_FLUSH_REQUEST has been sent before taking recover action. (C21)
*/
unsigned long flush_timeout;
/* The time since sending a frame to the bus after which the
* LE Client may assume that the frame has been either discarded or
* delivered to the recipient (C22)
*/
unsigned long path_switching_delay;
u8 *tlvs; /* LANE2: TLVs are new */
u32 sizeoftlvs; /* The size of the tlv array in bytes */
int lane_version; /* LANE2 */
int itfnum; /* e.g. 2 for lec2, 5 for lec5 */
struct lane2_ops *lane2_ops; /* can be NULL for LANE v1 */
int is_proxy; /* bridge between ATM and Ethernet */
int is_trdev; /* Device type, 0 = Ethernet, 1 = TokenRing */
};
struct lec_vcc_priv {
void (*old_pop) (struct atm_vcc *vcc, struct sk_buff *skb);
int xoff;
};
#define LEC_VCC_PRIV(vcc) ((struct lec_vcc_priv *)((vcc)->user_back))
#endif /* _LEC_H_ */
|
