1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
142 lines
5.3 KiB
C
142 lines
5.3 KiB
C
/*
|
|
*
|
|
* Lan Emulation client header file
|
|
*
|
|
* Marko Kiiskila mkiiskila@yahoo.com
|
|
*
|
|
*/
|
|
|
|
#ifndef _LEC_H_
|
|
#define _LEC_H_
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/atmdev.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/atmlec.h>
|
|
|
|
#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];
|
|
};
|
|
|
|
#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 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. */
|
|
spinlock_t lec_arp_lock;
|
|
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 */
|
|
};
|
|
|
|
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_ */
|
|
|