patch-2.3.15 linux/net/atm/lec.h

• Lines: 151
• Date: Mon Aug 23 09:56:32 1999
• Orig file: v2.3.14/linux/net/atm/lec.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.14/linux/net/atm/lec.h linux/net/atm/lec.h
@@ -0,0 +1,150 @@
+/*
+ *
+ * Lan Emulation client header file
+ *
+ * Marko Kiiskila carnil@cs.tut.fi
+ *
+ */
+
+#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 {
+  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 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 enet_statistics 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_
+