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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ATMMPC_H_
#define _ATMMPC_H_

#include <linux/atmapi.h>
#include <linux/atmioc.h>
#include <linux/atm.h>
#include <linux/types.h>

#define ATMMPC_CTRL _IO('a', ATMIOC_MPOA)
#define ATMMPC_DATA _IO('a', ATMIOC_MPOA + 1)

#define MPC_SOCKET_INGRESS 1
#define MPC_SOCKET_EGRESS  2

struct atmmpc_ioc {
	int dev_num;
	__be32 ipaddr; /* the IP address of the shortcut    */
	int type;      /* ingress or egress                 */
};

typedef struct in_ctrl_info {
	__u8 Last_NHRP_CIE_code;
	__u8 Last_Q2931_cause_value;
	__u8 eg_MPC_ATM_addr[ATM_ESA_LEN];
	__be32 tag;
	__be32 in_dst_ip; /* IP address this ingress MPC sends packets to */
	__u16 holding_time;
	__u32 request_id;
} in_ctrl_info;

typedef struct eg_ctrl_info {
	__u8 DLL_header[256];
	__u8 DH_length;
	__be32 cache_id;
	__be32 tag;
	__be32 mps_ip;
	__be32 eg_dst_ip; /* IP address to which ingress MPC sends packets */
	__u8 in_MPC_data_ATM_addr[ATM_ESA_LEN];
	__u16 holding_time;
} eg_ctrl_info;

struct mpc_parameters {
	__u16 mpc_p1;	/* Shortcut-Setup Frame Count    */
	__u16 mpc_p2;	/* Shortcut-Setup Frame Time     */
	__u8 mpc_p3[8]; /* Flow-detection Protocols      */
	__u16 mpc_p4;	/* MPC Initial Retry Time        */
	__u16 mpc_p5;	/* MPC Retry Time Maximum        */
	__u16 mpc_p6;	/* Hold Down Time                */
};

struct k_message {
	__u16 type;
	__be32 ip_mask;
	__u8 MPS_ctrl[ATM_ESA_LEN];
	union {
		in_ctrl_info in_info;
		eg_ctrl_info eg_info;
		struct mpc_parameters params;
	} content;
	struct atm_qos qos;
} __ATM_API_ALIGN;

struct llc_snap_hdr {
	/* RFC 1483 LLC/SNAP encapsulation for routed IP PDUs */
	__u8 dsap;    /* Destination Service Access Point (0xAA)     */
	__u8 ssap;    /* Source Service Access Point      (0xAA)     */
	__u8 ui;      /* Unnumbered Information           (0x03)     */
	__u8 org[3];  /* Organizational identification    (0x000000) */
	__u8 type[2]; /* Ether type (for IP)              (0x0800)   */
};

/* TLVs this MPC recognizes */
#define TLV_MPOA_DEVICE_TYPE 0x00a03e2a

/* MPOA device types in MPOA Device Type TLV */
#define NON_MPOA    0
#define MPS	    1
#define MPC	    2
#define MPS_AND_MPC 3

/* MPC parameter defaults */

#define MPC_P1		     10	  /* Shortcut-Setup Frame Count  */
#define MPC_P2		     1	  /* Shortcut-Setup Frame Time   */
#define MPC_P3		     0	  /* Flow-detection Protocols    */
#define MPC_P4		     5	  /* MPC Initial Retry Time      */
#define MPC_P5		     40	  /* MPC Retry Time Maximum      */
#define MPC_P6		     160  /* Hold Down Time              */
#define HOLDING_TIME_DEFAULT 1200 /* same as MPS-p7 */

/* MPC constants */

#define MPC_C1 2  /* Retry Time Multiplier       */
#define MPC_C2 60 /* Initial Keep-Alive Lifetime */

/* Message types - to MPOA daemon */

#define SND_MPOA_RES_RQST    201
#define SET_MPS_CTRL_ADDR    202
#define SND_MPOA_RES_RTRY    203 /* Different type in a retry due to req id         */
#define STOP_KEEP_ALIVE_SM   204
#define EGRESS_ENTRY_REMOVED 205
#define SND_EGRESS_PURGE     206
#define DIE		     207 /* tell the daemon to exit()                       */
#define DATA_PLANE_PURGE                                                     \
	208 /* Data plane purge because of egress cache hit miss or dead MPS \
	     */
#define OPEN_INGRESS_SVC 209

/* Message types - from MPOA daemon */

#define MPOA_TRIGGER_RCVD   101
#define MPOA_RES_REPLY_RCVD 102
#define INGRESS_PURGE_RCVD  103
#define EGRESS_PURGE_RCVD   104
#define MPS_DEATH	    105
#define CACHE_IMPOS_RCVD    106
#define SET_MPC_CTRL_ADDR   107 /* Our MPC's control ATM address   */
#define SET_MPS_MAC_ADDR    108
#define CLEAN_UP_AND_EXIT   109
#define SET_MPC_PARAMS	    110 /* MPC configuration parameters    */

/* Message types - bidirectional */

#define RELOAD 301 /* kill -HUP the daemon for reload */

#endif /* _ATMMPC_H_ */