/* * 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_ */