cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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lec_arpc.h (3021B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Lec arp cache
      4 *
      5 * Marko Kiiskila <mkiiskila@yahoo.com>
      6 */
      7#ifndef _LEC_ARP_H_
      8#define _LEC_ARP_H_
      9#include <linux/atm.h>
     10#include <linux/atmdev.h>
     11#include <linux/if_ether.h>
     12#include <linux/atmlec.h>
     13
     14struct lec_arp_table {
     15	struct hlist_node next;		/* Linked entry list */
     16	unsigned char atm_addr[ATM_ESA_LEN];	/* Atm address */
     17	unsigned char mac_addr[ETH_ALEN];	/* Mac address */
     18	int is_rdesc;			/* Mac address is a route descriptor */
     19	struct atm_vcc *vcc;		/* Vcc this entry is attached */
     20	struct atm_vcc *recv_vcc;	/* Vcc we receive data from */
     21
     22	void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb);
     23					/* Push that leads to daemon */
     24
     25	void (*old_recv_push) (struct atm_vcc *vcc, struct sk_buff *skb);
     26					/* Push that leads to daemon */
     27
     28	unsigned long last_used;	/* For expiry */
     29	unsigned long timestamp;	/* Used for various timestamping things:
     30					 * 1. FLUSH started
     31					 *    (status=ESI_FLUSH_PENDING)
     32					 * 2. Counting to
     33					 *    max_unknown_frame_time
     34					 *    (status=ESI_ARP_PENDING||
     35					 *     status=ESI_VC_PENDING)
     36					 */
     37	unsigned char no_tries;		/* No of times arp retry has been tried */
     38	unsigned char status;		/* Status of this entry */
     39	unsigned short flags;		/* Flags for this entry */
     40	unsigned short packets_flooded;	/* Data packets flooded */
     41	unsigned long flush_tran_id;	/* Transaction id in flush protocol */
     42	struct timer_list timer;	/* Arping timer */
     43	struct lec_priv *priv;		/* Pointer back */
     44	u8 *tlvs;
     45	u32 sizeoftlvs;			/*
     46					 * LANE2: Each MAC address can have TLVs
     47					 * associated with it.  sizeoftlvs tells
     48					 * the length of the tlvs array
     49					 */
     50	struct sk_buff_head tx_wait;	/* wait queue for outgoing packets */
     51	refcount_t usage;		/* usage count */
     52};
     53
     54/*
     55 * LANE2: Template tlv struct for accessing
     56 * the tlvs in the lec_arp_table->tlvs array
     57 */
     58struct tlv {
     59	u32 type;
     60	u8 length;
     61	u8 value[255];
     62};
     63
     64/* Status fields */
     65#define ESI_UNKNOWN 0		/*
     66				 * Next packet sent to this mac address
     67				 * causes ARP-request to be sent
     68				 */
     69#define ESI_ARP_PENDING 1	/*
     70				 * There is no ATM address associated with this
     71				 * 48-bit address.  The LE-ARP protocol is in
     72				 * progress.
     73				 */
     74#define ESI_VC_PENDING 2	/*
     75				 * There is a valid ATM address associated with
     76				 * this 48-bit address but there is no VC set
     77				 * up to that ATM address.  The signaling
     78				 * protocol is in process.
     79				 */
     80#define ESI_FLUSH_PENDING 4	/*
     81				 * The LEC has been notified of the FLUSH_START
     82				 * status and it is assumed that the flush
     83				 * protocol is in process.
     84				 */
     85#define ESI_FORWARD_DIRECT 5	/*
     86				 * Either the Path Switching Delay (C22) has
     87				 * elapsed or the LEC has notified the Mapping
     88				 * that the flush protocol has completed.  In
     89				 * either case, it is safe to forward packets
     90				 * to this address via the data direct VC.
     91				 */
     92
     93/* Flag values */
     94#define LEC_REMOTE_FLAG      0x0001
     95#define LEC_PERMANENT_FLAG   0x0002
     96
     97#endif /* _LEC_ARP_H_ */