| 1 |
1275 |
phoenix |
/*
|
| 2 |
|
|
*
|
| 3 |
|
|
* Lan Emulation client header file
|
| 4 |
|
|
*
|
| 5 |
|
|
* Marko Kiiskila carnil@cs.tut.fi
|
| 6 |
|
|
*
|
| 7 |
|
|
*/
|
| 8 |
|
|
|
| 9 |
|
|
#ifndef _LEC_H_
|
| 10 |
|
|
#define _LEC_H_
|
| 11 |
|
|
|
| 12 |
|
|
#include <linux/config.h>
|
| 13 |
|
|
#include <linux/atmdev.h>
|
| 14 |
|
|
#include <linux/netdevice.h>
|
| 15 |
|
|
#include <linux/atmlec.h>
|
| 16 |
|
|
|
| 17 |
|
|
#if defined (CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
|
| 18 |
|
|
#include <linux/if_bridge.h>
|
| 19 |
|
|
extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
|
| 20 |
|
|
unsigned char *addr);
|
| 21 |
|
|
extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
|
| 22 |
|
|
#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
|
| 23 |
|
|
|
| 24 |
|
|
#define LEC_HEADER_LEN 16
|
| 25 |
|
|
|
| 26 |
|
|
struct lecdatahdr_8023 {
|
| 27 |
|
|
unsigned short le_header;
|
| 28 |
|
|
unsigned char h_dest[ETH_ALEN];
|
| 29 |
|
|
unsigned char h_source[ETH_ALEN];
|
| 30 |
|
|
unsigned short h_type;
|
| 31 |
|
|
};
|
| 32 |
|
|
|
| 33 |
|
|
struct lecdatahdr_8025 {
|
| 34 |
|
|
unsigned short le_header;
|
| 35 |
|
|
unsigned char ac_pad;
|
| 36 |
|
|
unsigned char fc;
|
| 37 |
|
|
unsigned char h_dest[ETH_ALEN];
|
| 38 |
|
|
unsigned char h_source[ETH_ALEN];
|
| 39 |
|
|
};
|
| 40 |
|
|
|
| 41 |
|
|
#define LEC_MINIMUM_8023_SIZE 62
|
| 42 |
|
|
#define LEC_MINIMUM_8025_SIZE 16
|
| 43 |
|
|
|
| 44 |
|
|
/*
|
| 45 |
|
|
* Operations that LANE2 capable device can do. Two first functions
|
| 46 |
|
|
* are used to make the device do things. See spec 3.1.3 and 3.1.4.
|
| 47 |
|
|
*
|
| 48 |
|
|
* The third function is intented for the MPOA component sitting on
|
| 49 |
|
|
* top of the LANE device. The MPOA component assigns it's own function
|
| 50 |
|
|
* to (*associate_indicator)() and the LANE device will use that
|
| 51 |
|
|
* function to tell about TLVs it sees floating through.
|
| 52 |
|
|
*
|
| 53 |
|
|
*/
|
| 54 |
|
|
struct lane2_ops {
|
| 55 |
|
|
int (*resolve)(struct net_device *dev, u8 *dst_mac, int force,
|
| 56 |
|
|
u8 **tlvs, u32 *sizeoftlvs);
|
| 57 |
|
|
int (*associate_req)(struct net_device *dev, u8 *lan_dst,
|
| 58 |
|
|
u8 *tlvs, u32 sizeoftlvs);
|
| 59 |
|
|
void (*associate_indicator)(struct net_device *dev, u8 *mac_addr,
|
| 60 |
|
|
u8 *tlvs, u32 sizeoftlvs);
|
| 61 |
|
|
};
|
| 62 |
|
|
|
| 63 |
|
|
struct atm_lane_ops {
|
| 64 |
|
|
int (*lecd_attach)(struct atm_vcc *vcc, int arg);
|
| 65 |
|
|
int (*mcast_attach)(struct atm_vcc *vcc, int arg);
|
| 66 |
|
|
int (*vcc_attach)(struct atm_vcc *vcc, void *arg);
|
| 67 |
|
|
struct net_device * (*get_lec)(int itf);
|
| 68 |
|
|
struct module *owner;
|
| 69 |
|
|
};
|
| 70 |
|
|
|
| 71 |
|
|
/*
|
| 72 |
|
|
* ATM LAN Emulation supports both LLC & Dix Ethernet EtherType
|
| 73 |
|
|
* frames.
|
| 74 |
|
|
* 1. Dix Ethernet EtherType frames encoded by placing EtherType
|
| 75 |
|
|
* field in h_type field. Data follows immediatelly after header.
|
| 76 |
|
|
* 2. LLC Data frames whose total length, including LLC field and data,
|
| 77 |
|
|
* but not padding required to meet the minimum data frame length,
|
| 78 |
|
|
* is less than 1536(0x0600) MUST be encoded by placing that length
|
| 79 |
|
|
* in the h_type field. The LLC field follows header immediatelly.
|
| 80 |
|
|
* 3. LLC data frames longer than this maximum MUST be encoded by placing
|
| 81 |
|
|
* the value 0 in the h_type field.
|
| 82 |
|
|
*
|
| 83 |
|
|
*/
|
| 84 |
|
|
|
| 85 |
|
|
/* Hash table size */
|
| 86 |
|
|
#define LEC_ARP_TABLE_SIZE 16
|
| 87 |
|
|
|
| 88 |
|
|
struct lec_priv {
|
| 89 |
|
|
struct net_device_stats stats;
|
| 90 |
|
|
unsigned short lecid; /* Lecid of this client */
|
| 91 |
|
|
struct lec_arp_table *lec_arp_empty_ones;
|
| 92 |
|
|
/* Used for storing VCC's that don't have a MAC address attached yet */
|
| 93 |
|
|
struct lec_arp_table *lec_arp_tables[LEC_ARP_TABLE_SIZE];
|
| 94 |
|
|
/* Actual LE ARP table */
|
| 95 |
|
|
struct lec_arp_table *lec_no_forward;
|
| 96 |
|
|
/* Used for storing VCC's (and forward packets from) which are to
|
| 97 |
|
|
age out by not using them to forward packets.
|
| 98 |
|
|
This is because to some LE clients there will be 2 VCCs. Only
|
| 99 |
|
|
one of them gets used. */
|
| 100 |
|
|
struct lec_arp_table *mcast_fwds;
|
| 101 |
|
|
/* With LANEv2 it is possible that BUS (or a special multicast server)
|
| 102 |
|
|
establishes multiple Multicast Forward VCCs to us. This list
|
| 103 |
|
|
collects all those VCCs. LANEv1 client has only one item in this
|
| 104 |
|
|
list. These entries are not aged out. */
|
| 105 |
|
|
atomic_t lec_arp_users;
|
| 106 |
|
|
spinlock_t lec_arp_lock;
|
| 107 |
|
|
struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */
|
| 108 |
|
|
struct atm_vcc *lecd;
|
| 109 |
|
|
struct timer_list lec_arp_timer;
|
| 110 |
|
|
/* C10 */
|
| 111 |
|
|
unsigned int maximum_unknown_frame_count;
|
| 112 |
|
|
/* Within the period of time defined by this variable, the client will send
|
| 113 |
|
|
no more than C10 frames to BUS for a given unicast destination. (C11) */
|
| 114 |
|
|
unsigned long max_unknown_frame_time;
|
| 115 |
|
|
/* If no traffic has been sent in this vcc for this period of time,
|
| 116 |
|
|
vcc will be torn down (C12)*/
|
| 117 |
|
|
unsigned long vcc_timeout_period;
|
| 118 |
|
|
/* An LE Client MUST not retry an LE_ARP_REQUEST for a
|
| 119 |
|
|
given frame's LAN Destination more than maximum retry count times,
|
| 120 |
|
|
after the first LEC_ARP_REQUEST (C13)*/
|
| 121 |
|
|
unsigned short max_retry_count;
|
| 122 |
|
|
/* Max time the client will maintain an entry in its arp cache in
|
| 123 |
|
|
absence of a verification of that relationship (C17)*/
|
| 124 |
|
|
unsigned long aging_time;
|
| 125 |
|
|
/* Max time the client will maintain an entry in cache when
|
| 126 |
|
|
topology change flag is true (C18) */
|
| 127 |
|
|
unsigned long forward_delay_time;
|
| 128 |
|
|
/* Topology change flag (C19)*/
|
| 129 |
|
|
int topology_change;
|
| 130 |
|
|
/* Max time the client expects an LE_ARP_REQUEST/LE_ARP_RESPONSE
|
| 131 |
|
|
cycle to take (C20)*/
|
| 132 |
|
|
unsigned long arp_response_time;
|
| 133 |
|
|
/* Time limit ot wait to receive an LE_FLUSH_RESPONSE after the
|
| 134 |
|
|
LE_FLUSH_REQUEST has been sent before taking recover action. (C21)*/
|
| 135 |
|
|
unsigned long flush_timeout;
|
| 136 |
|
|
/* The time since sending a frame to the bus after which the
|
| 137 |
|
|
LE Client may assume that the frame has been either discarded or
|
| 138 |
|
|
delivered to the recipient (C22) */
|
| 139 |
|
|
unsigned long path_switching_delay;
|
| 140 |
|
|
|
| 141 |
|
|
u8 *tlvs; /* LANE2: TLVs are new */
|
| 142 |
|
|
u32 sizeoftlvs; /* The size of the tlv array in bytes */
|
| 143 |
|
|
int lane_version; /* LANE2 */
|
| 144 |
|
|
int itfnum; /* e.g. 2 for lec2, 5 for lec5 */
|
| 145 |
|
|
struct lane2_ops *lane2_ops; /* can be NULL for LANE v1 */
|
| 146 |
|
|
int is_proxy; /* bridge between ATM and Ethernet */
|
| 147 |
|
|
int is_trdev; /* Device type, 0 = Ethernet, 1 = TokenRing */
|
| 148 |
|
|
};
|
| 149 |
|
|
|
| 150 |
|
|
int lecd_attach(struct atm_vcc *vcc, int arg);
|
| 151 |
|
|
int lec_vcc_attach(struct atm_vcc *vcc, void *arg);
|
| 152 |
|
|
int lec_mcast_attach(struct atm_vcc *vcc, int arg);
|
| 153 |
|
|
struct net_device *get_dev_lec(int itf);
|
| 154 |
|
|
int make_lec(struct atm_vcc *vcc);
|
| 155 |
|
|
int send_to_lecd(struct lec_priv *priv,
|
| 156 |
|
|
atmlec_msg_type type, unsigned char *mac_addr,
|
| 157 |
|
|
unsigned char *atm_addr, struct sk_buff *data);
|
| 158 |
|
|
void lec_push(struct atm_vcc *vcc, struct sk_buff *skb);
|
| 159 |
|
|
|
| 160 |
|
|
extern struct atm_lane_ops *atm_lane_ops;
|
| 161 |
|
|
void atm_lane_ops_set(struct atm_lane_ops *hook);
|
| 162 |
|
|
int try_atm_lane_ops(void);
|
| 163 |
|
|
|
| 164 |
|
|
#endif /* _LEC_H_ */
|
| 165 |
|
|
|
