| /* |
| * 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 intended 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, const u8 *dst_mac, int force, |
| u8 **tlvs, u32 *sizeoftlvs); |
| int (*associate_req) (struct net_device *dev, const u8 *lan_dst, |
| const u8 *tlvs, u32 sizeoftlvs); |
| void (*associate_indicator) (struct net_device *dev, const u8 *mac_addr, |
| const 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 { |
| 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 */ |
| }; |
| |
| 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_ */ |