The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netncp/ncp_conn.h

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    1 /*-
    2  * Copyright (c) 1999, Boris Popov
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *    This product includes software developed by Boris Popov.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD: stable/8/sys/netncp/ncp_conn.h 199583 2009-11-20 15:27:52Z jhb $
   33  */
   34 #ifndef _NETNCP_NCP_CONN_H_
   35 #define _NETNCP_NCP_CONN_H_
   36 
   37 #ifndef _NETINET_IN_H_
   38 #include <netinet/in.h>
   39 #endif
   40 
   41 #ifndef _NETIPX_IPX_H_
   42 #include <netipx/ipx.h>
   43 #endif
   44 
   45 #ifndef _SYS_SOCKET_H_
   46 #include <sys/socket.h>
   47 #endif
   48 
   49 /* type of transport we use */
   50 /*#define       NCP_ON_IPX      0
   51 #define NCP_ON_TCP      1*/
   52 
   53 /* flags field in conn structure */
   54 #define NCPFL_SOCONN            0x0001  /* socket layer is up */
   55 #define NCPFL_ATTACHED          0x0002  /* ncp layer is up */
   56 #define NCPFL_LOGGED            0x0004  /* logged in to server */
   57 #define NCPFL_INVALID           0x0008  /* last request was not completed */
   58 #define NCPFL_INTR              0x0010  /* interrupted call */
   59 #define NCPFL_RESTORING         0x0020  /* trying to reconnect */
   60 #define NCPFL_PERMANENT         0x0040  /* no way to kill conn, when this set */
   61 #define NCPFL_PRIMARY           0x0080  /* have meaning only for owner */
   62 #define NCPFL_WASATTACHED       0x0100  /* there was at least one successfull connect */
   63 #define NCPFL_WASLOGGED         0x0200  /* there was at least one successfull login */
   64 #define NCPFL_SIGNACTIVE        0x1000  /* packet signing active */
   65 #define NCPFL_SIGNWANTED        0x2000  /* signing should start */
   66 
   67 /* access mode for connection */
   68 #define NCPM_READ               0400    /* able to fetch conn params */
   69 #define NCPM_WRITE              0200    /* modify/close */
   70 #define NCPM_EXECUTE            0100    /* run requests */
   71 
   72 #define NCP_DEFAULT_OWNER       ((uid_t)-1)
   73 #define NCP_DEFAULT_GROUP       ((uid_t)-1)
   74 
   75 
   76 /* args used to create connection */
   77 #define ncp_conn_loginfo        ncp_conn_args
   78 struct ncp_conn_args {
   79         int             opt;
   80 #define NCP_OPT_WDOG            1       /* need watch dog socket */
   81 #define NCP_OPT_MSG             2       /* need message socket */
   82 #define NCP_OPT_SIGN            4       /* signatures wanted */
   83 #define NCP_OPT_BIND            8       /* force bindery login */
   84 #define NCP_OPT_PERMANENT       0x10    /* only for refernce, completly ignored */
   85 #define NCP_OPT_NOUPCASEPASS    0x20    /* leave password as is */
   86         int             sig_level;      /* wanted signature level */
   87         char            server[NCP_BINDERY_NAME_LEN+1];
   88         char            *user;
   89         char            *password;
   90         u_int32_t       objtype;
   91         union {
   92                 struct sockaddr addr;
   93                 struct sockaddr_ipx ipxaddr;
   94                 struct sockaddr_in inaddr;
   95         } addr;
   96         int             timeout;        /* ncp rq timeout */
   97         int             retry_count;    /* counts to give an error */
   98         uid_t           owner;          /* proposed owner of connection */
   99         gid_t           group;          /* proposed group of connection */
  100         mode_t          access_mode;    /* R/W - can do rq's, X - can see the conn */
  101 };
  102 
  103 #define ipxaddr         addr.ipxaddr
  104 #define inaddr          addr.inaddr
  105 #define saddr           addr.addr
  106 
  107 /* user side structure to issue ncp calls */
  108 struct ncp_buf {
  109         int     rqsize;                 /* request size without ncp header */
  110         int     rpsize;                 /* reply size minus ncp header */
  111         int     cc;                     /* completion code */
  112         int     cs;                     /* connection state */
  113         char    packet[NCP_MAX_PACKET_SIZE];/* Here we prepare requests and receive replies */
  114 };
  115 
  116 /*
  117  * Connection status, returned via sysctl(vfs.nwfs.connstat)
  118  */
  119 struct ncp_conn_stat {
  120         struct ncp_conn_args li;
  121         int             connRef;
  122         int             ref_cnt;
  123         int             connid;
  124         int             buffer_size;
  125         int             flags;
  126         int             sign_active;
  127         uid_t           owner;
  128         gid_t           group;
  129         char            user[NCP_MAXUSERNAMELEN+1];
  130 };
  131 
  132 #ifdef _KERNEL
  133 
  134 #ifndef LK_SHARED
  135 #include <sys/lock.h>
  136 #include <sys/lockmgr.h>
  137 #endif
  138 
  139 struct socket;
  140 struct u_cred;
  141 
  142 SLIST_HEAD(ncp_conn_head,ncp_conn);
  143 
  144 struct ncp_rq;
  145 struct ncp_conn;
  146 
  147 /*
  148  * External and internal processes can reference connection only by handle.
  149  * This gives us a freedom in maintance of underlying connections.
  150  */
  151 struct ncp_handle {
  152         SLIST_ENTRY(ncp_handle) nh_next;
  153         int             nh_id;          /* handle id */
  154         struct ncp_conn*nh_conn;        /* which conn we are refernce */
  155         struct thread * nh_td;          /* who owns the handle  */
  156         int             nh_ref;         /* one process can asquire many handles, but we return the one */
  157 };
  158 
  159 /* 
  160  * Describes any connection to server 
  161  */
  162 struct ncp_conn {
  163         SLIST_ENTRY(ncp_conn) nc_next;
  164         struct ncp_conn_args li;
  165         struct ucred    *nc_owner;
  166         gid_t           nc_group;
  167         int             flags;
  168         int             nc_id;
  169         struct socket   *ncp_so;
  170         struct socket   *wdg_so;
  171         struct socket   *msg_so;
  172         struct socket   *bc_so;
  173         int             ref_cnt;                /* how many handles leased */
  174         SLIST_HEAD(ncp_ref_hd,ncp_ref) ref_list;/* list of handles */
  175         struct lock     nc_lock;                /* excl locks */
  176         int             nc_lwant;               /* number of wanted locks */
  177         struct thread   *td;                    /* pid currently operates */
  178         struct ucred    *ucred;                 /* usr currently operates */
  179         /* Fields used to process ncp requests */
  180         int             connid;                 /* assigned by server */
  181         u_int8_t        seq;
  182         int             buffer_size;            /* Negotiated bufsize */
  183         /* Fields used to make packet signatures */
  184         u_int32_t       sign_root[2];
  185         u_int32_t       sign_state[4];          /* md4 state */
  186 #ifdef NCPBURST
  187         /* Fields used for packet bursting */
  188         u_long          bc_pktseq;              /* raw packet sequence */
  189         u_short         bc_seq;                 /* burst sequence */
  190         u_long          bc_locid;               /* local connection id */
  191         u_long          bc_remid;               /* remote connection id */
  192         u_long          bc_pktsize;             /* negotiated burst packet size */
  193 #endif
  194 };
  195 
  196 int  ncp_conn_init(void);
  197 int  ncp_conn_destroy(void);
  198 int  ncp_conn_alloc(struct ncp_conn_args *cap,
  199         struct thread *td, struct ucred *cred, struct ncp_conn **connid);
  200 int  ncp_conn_free(struct ncp_conn *conn);
  201 int  ncp_conn_access(struct ncp_conn *conn,struct ucred *cred,mode_t mode);
  202 int  ncp_conn_lock(struct ncp_conn *conn,struct thread *td, struct ucred *cred,int mode);
  203 void ncp_conn_unlock(struct ncp_conn *conn,struct thread *td);
  204 int  ncp_conn_assert_locked(struct ncp_conn *conn,const char *checker,struct thread *td);
  205 void ncp_conn_invalidate(struct ncp_conn *ncp);
  206 int  ncp_conn_invalid(struct ncp_conn *ncp);
  207 /*int  ncp_conn_ref(struct ncp_conn *conn, pid_t pid);
  208 int  ncp_conn_rm_ref(struct ncp_conn *conn, pid_t pid, int force);
  209 void ncp_conn_list_rm_ref(pid_t pid);*/
  210 int  ncp_conn_getbyref(int connRef,struct thread *td, struct ucred *cred, int mode,
  211         struct ncp_conn **connpp);
  212 int  ncp_conn_getbyli(struct ncp_conn_loginfo *li,struct thread *td, struct ucred *cred, 
  213         int mode, struct ncp_conn **connpp);
  214 int  ncp_conn_setprimary(struct ncp_conn *conn, int on);
  215 int  ncp_conn_locklist(int flags, struct thread *td);
  216 void ncp_conn_unlocklist(struct thread *td);
  217 int  ncp_conn_gethandle(struct ncp_conn *conn, struct thread *td, struct ncp_handle **handle);
  218 int  ncp_conn_puthandle(struct ncp_handle *handle, struct thread *td, int force);
  219 int  ncp_conn_findhandle(int connHandle, struct thread *td, struct ncp_handle **handle);
  220 int  ncp_conn_getattached(struct ncp_conn_args *li,struct thread *td, struct ucred *cred,int mode, struct ncp_conn **connpp);
  221 int  ncp_conn_putprochandles(struct thread *td);
  222 int  ncp_conn_getinfo(struct ncp_conn *ncp, struct ncp_conn_stat *ncs);
  223 
  224 int  ncp_conn_reconnect(struct ncp_conn *ncp);
  225 int  ncp_conn_login(struct ncp_conn *conn, struct thread *td, struct ucred *cred);
  226 
  227 extern struct ncp_conn_head conn_list;
  228 extern int ncp_burst_enabled;
  229 
  230 #ifdef MALLOC_DECLARE
  231 MALLOC_DECLARE(M_NCPDATA);
  232 #endif
  233 
  234 #endif /* _KERNEL */
  235 #endif /* _NCP_CONN_H_ */

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