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Diffstat (limited to '')
| -rw-r--r-- | net/atm/lec.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/net/atm/lec.h b/net/atm/lec.h new file mode 100644 index 000000000..be0e2667b --- /dev/null +++ b/net/atm/lec.h @@ -0,0 +1,155 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Lan Emulation client header file + * + * Marko Kiiskila <mkiiskila@yahoo.com> + */ + +#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 { + __be16 le_header; + unsigned char h_dest[ETH_ALEN]; + unsigned char h_source[ETH_ALEN]; + __be16 h_type; +}; + +struct lecdatahdr_8025 { + __be16 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 intended 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, const u8 *dst_mac, int force, + u8 **tlvs, u32 *sizeoftlvs); + int (*associate_req) (struct net_device *dev, const u8 *lan_dst, + const u8 *tlvs, u32 sizeoftlvs); + void (*associate_indicator) (struct net_device *dev, const u8 *mac_addr, + const 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 immediately 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 ETH_P_802_3_MIN MUST be encoded by placing that length + * in the h_type field. The LLC field follows header immediately. + * 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 { + unsigned short lecid; /* Lecid of this client */ + struct hlist_head lec_arp_empty_ones; + /* Used for storing VCC's that don't have a MAC address attached yet */ + struct hlist_head lec_arp_tables[LEC_ARP_TABLE_SIZE]; + /* Actual LE ARP table */ + struct hlist_head 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 hlist_head 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 delayed_work lec_arp_work; /* 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 */ +}; + +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_ */ |