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155 lines
5.1 KiB
155 lines
5.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Lan Emulation client header file |
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* |
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* Marko Kiiskila <[email protected]> |
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*/ |
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#ifndef _LEC_H_ |
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#define _LEC_H_ |
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#include <linux/atmdev.h> |
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#include <linux/netdevice.h> |
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#include <linux/atmlec.h> |
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#define LEC_HEADER_LEN 16 |
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struct lecdatahdr_8023 { |
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__be16 le_header; |
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unsigned char h_dest[ETH_ALEN]; |
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unsigned char h_source[ETH_ALEN]; |
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__be16 h_type; |
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}; |
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struct lecdatahdr_8025 { |
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__be16 le_header; |
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unsigned char ac_pad; |
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unsigned char fc; |
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unsigned char h_dest[ETH_ALEN]; |
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unsigned char h_source[ETH_ALEN]; |
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}; |
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#define LEC_MINIMUM_8023_SIZE 62 |
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#define LEC_MINIMUM_8025_SIZE 16 |
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/* |
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* Operations that LANE2 capable device can do. Two first functions |
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* are used to make the device do things. See spec 3.1.3 and 3.1.4. |
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* |
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* The third function is intended for the MPOA component sitting on |
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* top of the LANE device. The MPOA component assigns it's own function |
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* to (*associate_indicator)() and the LANE device will use that |
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* function to tell about TLVs it sees floating through. |
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* |
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*/ |
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struct lane2_ops { |
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int (*resolve) (struct net_device *dev, const u8 *dst_mac, int force, |
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u8 **tlvs, u32 *sizeoftlvs); |
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int (*associate_req) (struct net_device *dev, const u8 *lan_dst, |
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const u8 *tlvs, u32 sizeoftlvs); |
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void (*associate_indicator) (struct net_device *dev, const u8 *mac_addr, |
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const u8 *tlvs, u32 sizeoftlvs); |
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}; |
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/* |
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* ATM LAN Emulation supports both LLC & Dix Ethernet EtherType |
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* frames. |
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* |
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* 1. Dix Ethernet EtherType frames encoded by placing EtherType |
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* field in h_type field. Data follows immediately after header. |
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* 2. LLC Data frames whose total length, including LLC field and data, |
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* but not padding required to meet the minimum data frame length, |
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* is less than ETH_P_802_3_MIN MUST be encoded by placing that length |
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* in the h_type field. The LLC field follows header immediately. |
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* 3. LLC data frames longer than this maximum MUST be encoded by placing |
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* the value 0 in the h_type field. |
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* |
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*/ |
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/* Hash table size */ |
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#define LEC_ARP_TABLE_SIZE 16 |
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struct lec_priv { |
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unsigned short lecid; /* Lecid of this client */ |
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struct hlist_head lec_arp_empty_ones; |
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/* Used for storing VCC's that don't have a MAC address attached yet */ |
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struct hlist_head lec_arp_tables[LEC_ARP_TABLE_SIZE]; |
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/* Actual LE ARP table */ |
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struct hlist_head lec_no_forward; |
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/* |
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* Used for storing VCC's (and forward packets from) which are to |
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* age out by not using them to forward packets. |
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* This is because to some LE clients there will be 2 VCCs. Only |
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* one of them gets used. |
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*/ |
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struct hlist_head mcast_fwds; |
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/* |
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* With LANEv2 it is possible that BUS (or a special multicast server) |
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* establishes multiple Multicast Forward VCCs to us. This list |
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* collects all those VCCs. LANEv1 client has only one item in this |
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* list. These entries are not aged out. |
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*/ |
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spinlock_t lec_arp_lock; |
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struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */ |
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struct atm_vcc *lecd; |
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struct delayed_work lec_arp_work; /* C10 */ |
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unsigned int maximum_unknown_frame_count; |
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/* |
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* Within the period of time defined by this variable, the client will send |
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* no more than C10 frames to BUS for a given unicast destination. (C11) |
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*/ |
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unsigned long max_unknown_frame_time; |
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/* |
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* If no traffic has been sent in this vcc for this period of time, |
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* vcc will be torn down (C12) |
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*/ |
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unsigned long vcc_timeout_period; |
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/* |
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* An LE Client MUST not retry an LE_ARP_REQUEST for a |
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* given frame's LAN Destination more than maximum retry count times, |
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* after the first LEC_ARP_REQUEST (C13) |
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*/ |
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unsigned short max_retry_count; |
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/* |
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* Max time the client will maintain an entry in its arp cache in |
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* absence of a verification of that relationship (C17) |
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*/ |
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unsigned long aging_time; |
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/* |
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* Max time the client will maintain an entry in cache when |
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* topology change flag is true (C18) |
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*/ |
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unsigned long forward_delay_time; /* Topology change flag (C19) */ |
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int topology_change; |
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/* |
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* Max time the client expects an LE_ARP_REQUEST/LE_ARP_RESPONSE |
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* cycle to take (C20) |
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*/ |
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unsigned long arp_response_time; |
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/* |
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* Time limit ot wait to receive an LE_FLUSH_RESPONSE after the |
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* LE_FLUSH_REQUEST has been sent before taking recover action. (C21) |
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*/ |
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unsigned long flush_timeout; |
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/* The time since sending a frame to the bus after which the |
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* LE Client may assume that the frame has been either discarded or |
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* delivered to the recipient (C22) |
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*/ |
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unsigned long path_switching_delay; |
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u8 *tlvs; /* LANE2: TLVs are new */ |
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u32 sizeoftlvs; /* The size of the tlv array in bytes */ |
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int lane_version; /* LANE2 */ |
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int itfnum; /* e.g. 2 for lec2, 5 for lec5 */ |
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struct lane2_ops *lane2_ops; /* can be NULL for LANE v1 */ |
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int is_proxy; /* bridge between ATM and Ethernet */ |
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}; |
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struct lec_vcc_priv { |
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void (*old_pop) (struct atm_vcc *vcc, struct sk_buff *skb); |
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int xoff; |
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}; |
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#define LEC_VCC_PRIV(vcc) ((struct lec_vcc_priv *)((vcc)->user_back)) |
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#endif /* _LEC_H_ */
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