include/linux/ncp_fs_sb.h

   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
  22 struct sock;
  23
  24 struct 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
 132 extern void ncp_tcp_rcv_proc(struct work_struct *work);
 133 extern void ncp_tcp_tx_proc(struct work_struct *work);
 134 extern void ncpdgram_rcv_proc(struct work_struct *work);
 135 extern void ncpdgram_timeout_proc(struct work_struct *work);
 136 extern void ncpdgram_timeout_call(unsigned long server);
 137 extern void ncp_tcp_data_ready(struct sock* sk, int len);
 138 extern void ncp_tcp_write_space(struct sock* sk);
 139 extern 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
 147 static inline int ncp_conn_valid(struct ncp_server *server)
 148 {
 149         return ((server->conn_status & 0x11) == 0);
 150 }
 151
 152 static inline void ncp_invalidate_conn(struct ncp_server *server)
 153 {
 154         server->conn_status |= 0x01;
 155 }
 156
 157 #endif                          /* __KERNEL__ */
 158
 159 #endif
 160