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/*

 *  ncp_fs_sb.h

 *

 *  Copyright (C) 1995, 1996 by Volker Lendecke

 *

 */

#ifndef _NCP_FS_SB

#define _NCP_FS_SB

#include <linux/types.h>

#include <linux/ncp_mount.h>

#include <linux/net.h>

#include <linux/mutex.h>

#ifdef __KERNEL__

#include <linux/workqueue.h>

#define NCP_DEFAULT_OPTIONS 0           /* 2 for packet signatures */

struct sock;

struct ncp_server {

        struct ncp_mount_data_kernel m; /* Nearly all of the mount data is of

                                           interest for us later, so we store

                                           it completely. */

        __u8 name_space[NCP_NUMBER_OF_VOLUMES + 2];

        struct file *ncp_filp;  /* File pointer to ncp socket */

        struct socket *ncp_sock;/* ncp socket */

        struct file *info_filp;

        struct socket *info_sock;

        u8 sequence;

        u8 task;

        u16 connection;         /* Remote connection number */

        u8 completion;          /* Status message from server */

        u8 conn_status;         /* Bit 4 = 1 ==> Server going down, no

                                   requests allowed anymore.

                                   Bit 0 = 1 ==> Server is down. */

        int buffer_size;        /* Negotiated bufsize */

        int reply_size;         /* Size of last reply */

        int packet_size;

        unsigned char *packet;  /* Here we prepare requests and

                                   receive replies */

        unsigned char *txbuf;   /* Storage for current request */

        unsigned char *rxbuf;   /* Storage for reply to current request */

        int lock;               /* To prevent mismatch in protocols. */

        struct mutex mutex;

        int current_size;       /* for packet preparation */

        int has_subfunction;

        int ncp_reply_size;

        int root_setuped;

        /* info for packet signing */

        int sign_wanted;        /* 1=Server needs signed packets */

        int sign_active;        /* 0=don't do signing, 1=do */

        char sign_root[8];      /* generated from password and encr. key */

        char sign_last[16];

        /* Authentication info: NDS or BINDERY, username */

        struct {

                int     auth_type;

                size_t  object_name_len;

                void*   object_name;

                int     object_type;

        } auth;

        /* Password info */

        struct {

                size_t  len;

                void*   data;

        } priv;

        /* nls info: codepage for volume and charset for I/O */

        struct nls_table *nls_vol;

        struct nls_table *nls_io;

        /* maximum age in jiffies */

        int dentry_ttl;

        /* miscellaneous */

        unsigned int flags;

        spinlock_t requests_lock;       /* Lock accesses to tx.requests, tx.creq and rcv.creq when STREAM mode */

        void (*data_ready)(struct sock* sk, int len);

        void (*error_report)(struct sock* sk);

        void (*write_space)(struct sock* sk);   /* STREAM mode only */

        struct {

                struct work_struct tq;          /* STREAM/DGRAM: data/error ready */

                struct ncp_request_reply* creq; /* STREAM/DGRAM: awaiting reply from this request */

                struct mutex creq_mutex;        /* DGRAM only: lock accesses to rcv.creq */

                unsigned int state;             /* STREAM only: receiver state */

                struct {

                        __u32 magic __attribute__((packed));

                        __u32 len __attribute__((packed));

                        __u16 type __attribute__((packed));

                        __u16 p1 __attribute__((packed));

                        __u16 p2 __attribute__((packed));

                        __u16 p3 __attribute__((packed));

                        __u16 type2 __attribute__((packed));

                } buf;                          /* STREAM only: temporary buffer */

                unsigned char* ptr;             /* STREAM only: pointer to data */

                size_t len;                     /* STREAM only: length of data to receive */

        } rcv;

        struct {

                struct list_head requests;      /* STREAM only: queued requests */

                struct work_struct tq;          /* STREAM only: transmitter ready */

                struct ncp_request_reply* creq; /* STREAM only: currently transmitted entry */

        } tx;

        struct timer_list timeout_tm;           /* DGRAM only: timeout timer */

        struct work_struct timeout_tq;          /* DGRAM only: associated queue, we run timers from process context */

        int timeout_last;                       /* DGRAM only: current timeout length */

        int timeout_retries;                    /* DGRAM only: retries left */

        struct {

                size_t len;

                __u8 data[128];

        } unexpected_packet;

};

extern void ncp_tcp_rcv_proc(struct work_struct *work);

extern void ncp_tcp_tx_proc(struct work_struct *work);

extern void ncpdgram_rcv_proc(struct work_struct *work);

extern void ncpdgram_timeout_proc(struct work_struct *work);

extern void ncpdgram_timeout_call(unsigned long server);

extern void ncp_tcp_data_ready(struct sock* sk, int len);

extern void ncp_tcp_write_space(struct sock* sk);

extern void ncp_tcp_error_report(struct sock* sk);

#define NCP_FLAG_UTF8   1

#define NCP_CLR_FLAG(server, flag)      ((server)->flags &= ~(flag))

#define NCP_SET_FLAG(server, flag)      ((server)->flags |= (flag))

#define NCP_IS_FLAG(server, flag)       ((server)->flags & (flag))

static inline int ncp_conn_valid(struct ncp_server *server)

{

        return ((server->conn_status & 0x11) == 0);

}

static inline void ncp_invalidate_conn(struct ncp_server *server)

{

        server->conn_status |= 0x01;

}

#endif                          /* __KERNEL__ */

#endif