Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * | |
3 | * Lan Emulation client header file | |
4 | * | |
5 | * Marko Kiiskila mkiiskila@yahoo.com | |
6 | * | |
7 | */ | |
8 | ||
9 | #ifndef _LEC_H_ | |
10 | #define _LEC_H_ | |
11 | ||
12 | #include <linux/config.h> | |
13 | #include <linux/atmdev.h> | |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/atmlec.h> | |
16 | ||
17 | #define LEC_HEADER_LEN 16 | |
18 | ||
19 | struct lecdatahdr_8023 { | |
20 | unsigned short le_header; | |
21 | unsigned char h_dest[ETH_ALEN]; | |
22 | unsigned char h_source[ETH_ALEN]; | |
23 | unsigned short h_type; | |
24 | }; | |
25 | ||
26 | struct lecdatahdr_8025 { | |
27 | unsigned short le_header; | |
28 | unsigned char ac_pad; | |
29 | unsigned char fc; | |
30 | unsigned char h_dest[ETH_ALEN]; | |
31 | unsigned char h_source[ETH_ALEN]; | |
32 | }; | |
33 | ||
34 | #define LEC_MINIMUM_8023_SIZE 62 | |
35 | #define LEC_MINIMUM_8025_SIZE 16 | |
36 | ||
37 | /* | |
38 | * Operations that LANE2 capable device can do. Two first functions | |
39 | * are used to make the device do things. See spec 3.1.3 and 3.1.4. | |
40 | * | |
41 | * The third function is intented for the MPOA component sitting on | |
42 | * top of the LANE device. The MPOA component assigns it's own function | |
43 | * to (*associate_indicator)() and the LANE device will use that | |
44 | * function to tell about TLVs it sees floating through. | |
45 | * | |
46 | */ | |
47 | struct lane2_ops { | |
48 | int (*resolve)(struct net_device *dev, u8 *dst_mac, int force, | |
49 | u8 **tlvs, u32 *sizeoftlvs); | |
50 | int (*associate_req)(struct net_device *dev, u8 *lan_dst, | |
51 | u8 *tlvs, u32 sizeoftlvs); | |
52 | void (*associate_indicator)(struct net_device *dev, u8 *mac_addr, | |
53 | u8 *tlvs, u32 sizeoftlvs); | |
54 | }; | |
55 | ||
56 | /* | |
57 | * ATM LAN Emulation supports both LLC & Dix Ethernet EtherType | |
58 | * frames. | |
59 | * 1. Dix Ethernet EtherType frames encoded by placing EtherType | |
60 | * field in h_type field. Data follows immediatelly after header. | |
61 | * 2. LLC Data frames whose total length, including LLC field and data, | |
62 | * but not padding required to meet the minimum data frame length, | |
63 | * is less than 1536(0x0600) MUST be encoded by placing that length | |
64 | * in the h_type field. The LLC field follows header immediatelly. | |
65 | * 3. LLC data frames longer than this maximum MUST be encoded by placing | |
66 | * the value 0 in the h_type field. | |
67 | * | |
68 | */ | |
69 | ||
70 | /* Hash table size */ | |
71 | #define LEC_ARP_TABLE_SIZE 16 | |
72 | ||
73 | struct lec_priv { | |
74 | struct net_device_stats stats; | |
75 | unsigned short lecid; /* Lecid of this client */ | |
76 | struct lec_arp_table *lec_arp_empty_ones; | |
77 | /* Used for storing VCC's that don't have a MAC address attached yet */ | |
78 | struct lec_arp_table *lec_arp_tables[LEC_ARP_TABLE_SIZE]; | |
79 | /* Actual LE ARP table */ | |
80 | struct lec_arp_table *lec_no_forward; | |
81 | /* Used for storing VCC's (and forward packets from) which are to | |
82 | age out by not using them to forward packets. | |
83 | This is because to some LE clients there will be 2 VCCs. Only | |
84 | one of them gets used. */ | |
85 | struct lec_arp_table *mcast_fwds; | |
86 | /* With LANEv2 it is possible that BUS (or a special multicast server) | |
87 | establishes multiple Multicast Forward VCCs to us. This list | |
88 | collects all those VCCs. LANEv1 client has only one item in this | |
89 | list. These entries are not aged out. */ | |
90 | spinlock_t lec_arp_lock; | |
91 | struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */ | |
92 | struct atm_vcc *lecd; | |
93 | struct timer_list lec_arp_timer; | |
94 | /* C10 */ | |
95 | unsigned int maximum_unknown_frame_count; | |
96 | /* Within the period of time defined by this variable, the client will send | |
97 | no more than C10 frames to BUS for a given unicast destination. (C11) */ | |
98 | unsigned long max_unknown_frame_time; | |
99 | /* If no traffic has been sent in this vcc for this period of time, | |
100 | vcc will be torn down (C12)*/ | |
101 | unsigned long vcc_timeout_period; | |
102 | /* An LE Client MUST not retry an LE_ARP_REQUEST for a | |
103 | given frame's LAN Destination more than maximum retry count times, | |
104 | after the first LEC_ARP_REQUEST (C13)*/ | |
105 | unsigned short max_retry_count; | |
106 | /* Max time the client will maintain an entry in its arp cache in | |
107 | absence of a verification of that relationship (C17)*/ | |
108 | unsigned long aging_time; | |
109 | /* Max time the client will maintain an entry in cache when | |
110 | topology change flag is true (C18) */ | |
111 | unsigned long forward_delay_time; | |
112 | /* Topology change flag (C19)*/ | |
113 | int topology_change; | |
114 | /* Max time the client expects an LE_ARP_REQUEST/LE_ARP_RESPONSE | |
115 | cycle to take (C20)*/ | |
116 | unsigned long arp_response_time; | |
117 | /* Time limit ot wait to receive an LE_FLUSH_RESPONSE after the | |
118 | LE_FLUSH_REQUEST has been sent before taking recover action. (C21)*/ | |
119 | unsigned long flush_timeout; | |
120 | /* The time since sending a frame to the bus after which the | |
121 | LE Client may assume that the frame has been either discarded or | |
122 | delivered to the recipient (C22) */ | |
123 | unsigned long path_switching_delay; | |
124 | ||
125 | u8 *tlvs; /* LANE2: TLVs are new */ | |
126 | u32 sizeoftlvs; /* The size of the tlv array in bytes */ | |
127 | int lane_version; /* LANE2 */ | |
128 | int itfnum; /* e.g. 2 for lec2, 5 for lec5 */ | |
129 | struct lane2_ops *lane2_ops; /* can be NULL for LANE v1 */ | |
130 | int is_proxy; /* bridge between ATM and Ethernet */ | |
131 | int is_trdev; /* Device type, 0 = Ethernet, 1 = TokenRing */ | |
132 | }; | |
133 | ||
134 | struct lec_vcc_priv { | |
135 | void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb); | |
136 | int xoff; | |
137 | }; | |
138 | ||
139 | #define LEC_VCC_PRIV(vcc) ((struct lec_vcc_priv *)((vcc)->user_back)) | |
140 | ||
141 | #endif /* _LEC_H_ */ | |
142 |