85 struct l2tp_session {  struct
86 	int			magic;		/* should be
89 	struct l2tp_tunnel	*tunnel;	/* back pointer to tunnel
91 	u32			session_id;
92 	u32			peer_session_id;
93 	u8			cookie[8];
94 	int			cookie_len;
95 	u8			peer_cookie[8];
96 	int			peer_cookie_len;
97 	u16			offset;		/* offset from end of L2TP header
99 	u16			l2specific_len;
100 	u16			l2specific_type;
101 	u16			hdr_len;
102 	u32			nr;		/* session NR state (receive) */
103 	u32			ns;		/* session NR state (send) */
104 	struct sk_buff_head	reorder_q;	/* receive reorder queue */
105 	u32			nr_max;		/* max NR. Depends on tunnel */
106 	u32			nr_window_size;	/* NR window size */
107 	u32			nr_oos;		/* NR of last OOS packet */
108 	int			nr_oos_count;	/* For OOS recovery */
109 	int			nr_oos_count_max;
110 	struct hlist_node	hlist;		/* Hash list node */
111 	atomic_t		ref_count;
113 	char			name[32];	/* for logging */
137 	int (*build_header)(struct l2tp_session *session, void *buf);  argument
138 	void (*recv_skb)(struct l2tp_session *session, struct sk_buff *skb, int data_len);  argument
139 	void (*session_close)(struct l2tp_session *session);  argument
140 	void (*ref)(struct l2tp_session *session);  argument
141 	void (*deref)(struct l2tp_session *session);  argument
143 	void (*show)(struct seq_file *m, void *priv);
145 	uint8_t			priv[0];	/* private data */