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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/atm/lec.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
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!
Diffstat (limited to 'net/atm/lec.h')
-rw-r--r--net/atm/lec.h142
1 files changed, 142 insertions, 0 deletions
diff --git a/net/atm/lec.h b/net/atm/lec.h
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+/*
+ *
+ * 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_ */
+