1/*
2 *  ncp_fs_sb.h
3 *
4 *  Copyright (C) 1995, 1996 by Volker Lendecke
5 *
6 */
7
8#ifndef _NCP_FS_SB
9#define _NCP_FS_SB
10
11#include <linux/types.h>
12#include <linux/ncp_mount.h>
13#include <linux/net.h>
14#include <linux/mutex.h>
15
16#ifdef __KERNEL__
17
18#include <linux/workqueue.h>
19
20#define NCP_DEFAULT_OPTIONS 0		/* 2 for packet signatures */
21
22struct sock;
23
24struct ncp_server {
25
26	struct ncp_mount_data_kernel m;	/* Nearly all of the mount data is of
27					   interest for us later, so we store
28					   it completely. */
29
30	__u8 name_space[NCP_NUMBER_OF_VOLUMES + 2];
31
32	struct file *ncp_filp;	/* File pointer to ncp socket */
33	struct socket *ncp_sock;/* ncp socket */
34	struct file *info_filp;
35	struct socket *info_sock;
36
37	u8 sequence;
38	u8 task;
39	u16 connection;		/* Remote connection number */
40
41	u8 completion;		/* Status message from server */
42	u8 conn_status;		/* Bit 4 = 1 ==> Server going down, no
43				   requests allowed anymore.
44				   Bit 0 = 1 ==> Server is down. */
45
46	int buffer_size;	/* Negotiated bufsize */
47
48	int reply_size;		/* Size of last reply */
49
50	int packet_size;
51	unsigned char *packet;	/* Here we prepare requests and
52				   receive replies */
53	unsigned char *txbuf;	/* Storage for current request */
54	unsigned char *rxbuf;	/* Storage for reply to current request */
55
56	int lock;		/* To prevent mismatch in protocols. */
57	struct mutex mutex;
58
59	int current_size;	/* for packet preparation */
60	int has_subfunction;
61	int ncp_reply_size;
62
63	int root_setuped;
64
65	/* info for packet signing */
66	int sign_wanted;	/* 1=Server needs signed packets */
67	int sign_active;	/* 0=don't do signing, 1=do */
68	char sign_root[8];	/* generated from password and encr. key */
69	char sign_last[16];
70
71	/* Authentication info: NDS or BINDERY, username */
72	struct {
73		int	auth_type;
74		size_t	object_name_len;
75		void*	object_name;
76		int	object_type;
77	} auth;
78	/* Password info */
79	struct {
80		size_t	len;
81		void*	data;
82	} priv;
83
84	/* nls info: codepage for volume and charset for I/O */
85	struct nls_table *nls_vol;
86	struct nls_table *nls_io;
87
88	/* maximum age in jiffies */
89	int dentry_ttl;
90
91	/* miscellaneous */
92	unsigned int flags;
93
94	spinlock_t requests_lock;	/* Lock accesses to tx.requests, tx.creq and rcv.creq when STREAM mode */
95
96	void (*data_ready)(struct sock* sk, int len);
97	void (*error_report)(struct sock* sk);
98	void (*write_space)(struct sock* sk);	/* STREAM mode only */
99	struct {
100		struct work_struct tq;		/* STREAM/DGRAM: data/error ready */
101		struct ncp_request_reply* creq;	/* STREAM/DGRAM: awaiting reply from this request */
102		struct mutex creq_mutex;	/* DGRAM only: lock accesses to rcv.creq */
103
104		unsigned int state;		/* STREAM only: receiver state */
105		struct {
106			__u32 magic __attribute__((packed));
107			__u32 len __attribute__((packed));
108			__u16 type __attribute__((packed));
109			__u16 p1 __attribute__((packed));
110			__u16 p2 __attribute__((packed));
111			__u16 p3 __attribute__((packed));
112			__u16 type2 __attribute__((packed));
113		} buf;				/* STREAM only: temporary buffer */
114		unsigned char* ptr;		/* STREAM only: pointer to data */
115		size_t len;			/* STREAM only: length of data to receive */
116	} rcv;
117	struct {
118		struct list_head requests;	/* STREAM only: queued requests */
119		struct work_struct tq;		/* STREAM only: transmitter ready */
120		struct ncp_request_reply* creq;	/* STREAM only: currently transmitted entry */
121	} tx;
122	struct timer_list timeout_tm;		/* DGRAM only: timeout timer */
123	struct work_struct timeout_tq;		/* DGRAM only: associated queue, we run timers from process context */
124	int timeout_last;			/* DGRAM only: current timeout length */
125	int timeout_retries;			/* DGRAM only: retries left */
126	struct {
127		size_t len;
128		__u8 data[128];
129	} unexpected_packet;
130};
131
132extern void ncp_tcp_rcv_proc(struct work_struct *work);
133extern void ncp_tcp_tx_proc(struct work_struct *work);
134extern void ncpdgram_rcv_proc(struct work_struct *work);
135extern void ncpdgram_timeout_proc(struct work_struct *work);
136extern void ncpdgram_timeout_call(unsigned long server);
137extern void ncp_tcp_data_ready(struct sock* sk, int len);
138extern void ncp_tcp_write_space(struct sock* sk);
139extern void ncp_tcp_error_report(struct sock* sk);
140
141#define NCP_FLAG_UTF8	1
142
143#define NCP_CLR_FLAG(server, flag)	((server)->flags &= ~(flag))
144#define NCP_SET_FLAG(server, flag)	((server)->flags |= (flag))
145#define NCP_IS_FLAG(server, flag)	((server)->flags & (flag))
146
147static inline int ncp_conn_valid(struct ncp_server *server)
148{
149	return ((server->conn_status & 0x11) == 0);
150}
151
152static inline void ncp_invalidate_conn(struct ncp_server *server)
153{
154	server->conn_status |= 0x01;
155}
156
157#endif				/* __KERNEL__ */
158
159#endif
160
161