lec.h
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上传日期:2013-02-24
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- /*
- *
- * Lan Emulation client header file
- *
- * Marko Kiiskila carnil@cs.tut.fi
- *
- */
- #ifndef _LEC_H_
- #define _LEC_H_
- #include <linux/config.h>
- #include <linux/atmdev.h>
- #include <linux/netdevice.h>
- #include <linux/atmlec.h>
- #if defined (CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
- #include <linux/if_bridge.h>
- extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
- unsigned char *addr);
- extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
- #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
- #define LEC_HEADER_LEN 16
- struct lecdatahdr_8023 {
- unsigned short le_header;
- unsigned char h_dest[ETH_ALEN];
- unsigned char h_source[ETH_ALEN];
- unsigned short h_type;
- };
- struct lecdatahdr_8025 {
- unsigned short le_header;
- unsigned char ac_pad;
- unsigned char fc;
- unsigned char h_dest[ETH_ALEN];
- unsigned char h_source[ETH_ALEN];
- };
- /*
- * 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);
- };
- struct atm_lane_ops {
- int (*lecd_attach)(struct atm_vcc *vcc, int arg);
- int (*mcast_attach)(struct atm_vcc *vcc, int arg);
- int (*vcc_attach)(struct atm_vcc *vcc, void *arg);
- struct net_device **(*get_lecs)(void);
- };
- /*
- * 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 lec_arp_table *lec_arp_empty_ones;
- /* Used for storing VCC's that don't have a MAC address attached yet */
- struct lec_arp_table *lec_arp_tables[LEC_ARP_TABLE_SIZE];
- /* Actual LE ARP table */
- struct lec_arp_table *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 lec_arp_table *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. */
- atomic_t lec_arp_lock_var;
- struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */
- struct atm_vcc *lecd;
- struct timer_list lec_arp_timer;
- /* 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 */
- };
- int lecd_attach(struct atm_vcc *vcc, int arg);
- int lec_vcc_attach(struct atm_vcc *vcc, void *arg);
- int lec_mcast_attach(struct atm_vcc *vcc, int arg);
- struct net_device **get_dev_lec(void);
- int make_lec(struct atm_vcc *vcc);
- int send_to_lecd(struct lec_priv *priv,
- atmlec_msg_type type, unsigned char *mac_addr,
- unsigned char *atm_addr, struct sk_buff *data);
- void lec_push(struct atm_vcc *vcc, struct sk_buff *skb);
- void atm_lane_init(void);
- void atm_lane_init_ops(struct atm_lane_ops *ops);
- #endif /* _LEC_H_ */