/* SPDX-License-Identifier: GPL-2.0 */#ifndef LLC_CONN_H#define LLC_CONN_H/* * Copyright (c) 1997 by Procom Technology, Inc. * 		 2001, 2002 by Arnaldo Carvalho de Melo <acme@conectiva.com.br> */#include <linux/timer.h>#include <net/llc_if.h>#include <net/sock.h>#include <linux/llc.h> #define LLC_EVENT                1#define LLC_PACKET               2 #define LLC2_P_TIME               2#define LLC2_ACK_TIME             1#define LLC2_REJ_TIME             3#define LLC2_BUSY_TIME            3 struct llc_timer {	struct timer_list timer;	unsigned long	  expire;	/* timer expire time */}; struct llc_sock {	/* struct sock must be the first member of llc_sock */	struct sock	    sk;	struct sockaddr_llc addr;		/* address sock is bound to */	u8		    state;		/* state of connection */	struct llc_sap	    *sap;		/* pointer to parent SAP */	struct llc_addr	    laddr;		/* lsap/mac pair */	struct llc_addr	    daddr;		/* dsap/mac pair */	struct net_device   *dev;		/* device to send to remote */	netdevice_tracker   dev_tracker;	u32		    copied_seq;		/* head of yet unread data */	u8		    retry_count;	/* number of retries */	u8		    ack_must_be_send;	u8		    first_pdu_Ns;	u8		    npta;	struct llc_timer    ack_timer;	struct llc_timer    pf_cycle_timer;	struct llc_timer    rej_sent_timer;	struct llc_timer    busy_state_timer;	/* ind busy clr at remote LLC */	u8		    vS;			/* seq# next in-seq I-PDU tx'd*/	u8		    vR;			/* seq# next in-seq I-PDU rx'd*/	u32		    n2;			/* max nbr re-tx's for timeout*/	u32		    n1;			/* max nbr octets in I PDU */	u8		    k;			/* tx window size; max = 127 */	u8		    rw;			/* rx window size; max = 127 */	u8		    p_flag;		/* state flags */	u8		    f_flag;	u8		    s_flag;	u8		    data_flag;	u8		    remote_busy_flag;	u8		    cause_flag;	struct sk_buff_head pdu_unack_q;	/* PUDs sent/waiting ack */	u16		    link;		/* network layer link number */	u8		    X;			/* a temporary variable */	u8		    ack_pf;		/* this flag indicates what is						   the P-bit of acknowledge */	u8		    failed_data_req; /* recognize that already exist a						failed llc_data_req_handler						(tx_buffer_full or unacceptable						state */	u8		    dec_step;	u8		    inc_cntr;	u8		    dec_cntr;	u8		    connect_step;	u8		    last_nr;	   /* NR of last pdu received */	u32		    rx_pdu_hdr;	   /* used for saving header of last pdu					      received and caused sending FRMR.					      Used for resending FRMR */	u32		    cmsg_flags;	struct hlist_node   dev_hash_node;}; static inline struct llc_sock *llc_sk(const struct sock *sk){	return (struct llc_sock *)sk;} static __inline__ void llc_set_backlog_type(struct sk_buff *skb, char type){	skb->cb[sizeof(skb->cb) - 1] = type;} static __inline__ char llc_backlog_type(struct sk_buff *skb){	return skb->cb[sizeof(skb->cb) - 1];} struct sock *llc_sk_alloc(struct net *net, int family, gfp_t priority,			  struct proto *prot, int kern);void llc_sk_stop_all_timers(struct sock *sk, bool sync);void llc_sk_free(struct sock *sk); void llc_sk_reset(struct sock *sk); /* Access to a connection */int llc_conn_state_process(struct sock *sk, struct sk_buff *skb);void llc_conn_send_pdu(struct sock *sk, struct sk_buff *skb);void llc_conn_rtn_pdu(struct sock *sk, struct sk_buff *skb);void llc_conn_resend_i_pdu_as_cmd(struct sock *sk, u8 nr, u8 first_p_bit);void llc_conn_resend_i_pdu_as_rsp(struct sock *sk, u8 nr, u8 first_f_bit);int llc_conn_remove_acked_pdus(struct sock *conn, u8 nr, u16 *how_many_unacked);struct sock *llc_lookup_established(struct llc_sap *sap, struct llc_addr *daddr,				    struct llc_addr *laddr, const struct net *net);void llc_sap_add_socket(struct llc_sap *sap, struct sock *sk);void llc_sap_remove_socket(struct llc_sap *sap, struct sock *sk); u8 llc_data_accept_state(u8 state);void llc_build_offset_table(void);#endif /* LLC_CONN_H */