FreeBSD/Linux Kernel Cross Reference
sys/netccitt/pk_var.h

     /*      $NetBSD: pk_var.h,v 1.17 2003/08/07 16:33:05 agc Exp $  */
     
     /*
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by the
      * Laboratory for Computation Vision and the Computer Science Department
      * of the University of British Columbia and the Computer Science
     * Department (IV) of the University of Erlangen-Nuremberg, Germany.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)pk_var.h    8.1 (Berkeley) 6/10/93
     */
    
    /*
     * Copyright (c) 1985 Computing Centre, University of British Columbia.
     * Copyright (c) 1990, 1991, 1992 Computer Science Department IV,
     *              University of Erlangen-Nuremberg, Germany.
     *
     * This code is derived from software contributed to Berkeley by the
     * Laboratory for Computation Vision and the Computer Science Department
     * of the University of British Columbia and the Computer Science
     * Department (IV) of the University of Erlangen-Nuremberg, Germany.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)pk_var.h    8.1 (Berkeley) 6/10/93
     */
    
    /*
     *
     *  X.25 Logical Channel Descriptor
     *
     */
    
    #if defined(_KERNEL_OPT)
    # include "opt_ccitt.h"
    #endif
    
     struct pklcd {
            struct  pklcd_q {
                    struct  pklcd_q *q_forw;        /* debugging chain */
                    struct  pklcd_q *q_back;        /* debugging chain */
            } lcd_q;
            int     (*lcd_upper)            /* switch to socket vs datagram vs ...*/
                            __P((struct mbuf *, void *));
            caddr_t lcd_upnext;             /* reference for lcd_upper() */
            void    (*lcd_send)             /* if X.25 front end, direct connect */
                            __P((struct pklcd *));
           caddr_t lcd_downnext;           /* reference for lcd_send() */
           short   lcd_lcn;                /* Logical channel number */
           short   lcd_state;              /* Logical Channel state */
           short   lcd_timer;              /* Various timer values */
           short   lcd_dg_timer;           /* to reclaim idle datagram circuits */
           bool    lcd_intrconf_pending;   /* Interrupt confirmation pending */
           octet   lcd_intrdata;           /* Octet of incoming intr data */
           char    lcd_retry;              /* Timer retry count */
           char    lcd_rsn;                /* Seq no of last received packet */
           char    lcd_ssn;                /* Seq no of next packet to send */
           char    lcd_output_window;      /* Output flow control window */
           char    lcd_input_window;       /* Input flow control window */
           char    lcd_last_transmitted_pr;/* Last Pr value transmitted */
           bool    lcd_rnr_condition;      /* Remote in busy condition */
           bool    lcd_window_condition;   /* Output window size exceeded */
           bool    lcd_reset_condition;    /* True, if waiting reset confirm */
           bool    lcd_rxrnr_condition;    /* True, if we have sent rnr */
           char    lcd_packetsize;         /* Maximum packet size */
           char    lcd_windowsize;         /* Window size - both directions */
           octet   lcd_closed_user_group;  /* Closed user group specification */
           char    lcd_flags;              /* copy of sockaddr_x25 op_flags */
           struct  mbuf *lcd_facilities;   /* user supplied facilities for cr */
           struct  mbuf *lcd_template;     /* Address of response packet */
           struct  socket *lcd_so;         /* Socket addr for connection */
           struct  sockaddr_x25 *lcd_craddr;/* Calling address pointer */
           struct  sockaddr_x25 *lcd_ceaddr;/* Called address pointer */
           time_t  lcd_stime;              /* time circuit established */
           long    lcd_txcnt;              /* Data packet transmit count */
           long    lcd_rxcnt;              /* Data packet receive count */
           short   lcd_intrcnt;            /* Interrupt packet transmit count */
           TAILQ_ENTRY(pklcd) lcd_listen;  /* Next lcd on listen queue */
           struct  pkcb *lcd_pkp;          /* Network this lcd is attached to */
           struct  mbuf *lcd_cps;          /* Complete Packet Sequence reassembly*/
           long    lcd_cpsmax;             /* Max length for CPS */
           struct  sockaddr_x25 lcd_faddr; /* Remote Address (Calling) */
           struct  sockaddr_x25 lcd_laddr; /* Local Address (Called) */
           struct  sockbuf lcd_sb;         /* alternate for datagram service */
   };
   
   /*
    * Per network information, allocated dynamically
    * when a new network is configured.
    */
   
   struct  pkcb {
           struct pkcb_q {
                   struct pkcb_q *q_forw;
                   struct pkcb_q *q_backw;
           } pk_q;
           short   pk_state;               /* packet level status */
           u_short pk_maxlcn;              /* local copy of xc_maxlcn */
           int     (*pk_lloutput)          /* link level output procedure */
                           __P((struct mbuf *, ...));
           void    *(*pk_llctlinput)       /* link level ctloutput procedure */
                           __P((int, struct sockaddr *, void *));
           caddr_t pk_llnext;              /* handle for next level down */
           struct  x25config *pk_xcp;      /* network specific configuration */
           struct  x25_ifaddr *pk_ia;      /* backpointer to ifaddr */
           struct  pklcd **pk_chan;        /* actual size == xc_maxlcn+1 */
           short   pk_dxerole;             /* DXE role of PLE over LLC2 */
           short   pk_restartcolls;        /* counting RESTART collisions til resolved */
           struct  rtentry *pk_rt;         /* back pointer to route */
           struct  rtentry *pk_llrt;       /* pointer to reverse mapping */
           u_short pk_refcount;            /* ref count */
   };
   
   #define FOR_ALL_PKCBS(p) for((p) = (struct pkcb *)(pkcb_q.q_forw); \
                                (pkcb_q.q_forw != &pkcb_q) && ((struct pkcb_q *)(p) != &pkcb_q); \
                                (p) = (struct pkcb *)((p) -> pk_q.q_forw))
   
   #define PQEMPTY         (pkcb_q.q_forw == &pkcb_q)
   
   /*
    *      Interface address, x25 version. Exactly one of these structures is 
    *      allocated for each interface with an x25 address.
    *
    *      The ifaddr structure conatins the protocol-independent part
    *      of the structure, and is assumed to be first.
    */
   struct x25_ifaddr {
           struct  ifaddr ia_ifa;          /* protocol-independent info */
   #define ia_ifp  ia_ifa.ifa_ifp
   #define ia_flags ia_ifa.ifa_flags
           struct  x25config ia_xc;        /* network specific configuration */
           struct  pkcb *ia_pkcb;
   #define ia_maxlcn ia_xc.xc_maxlcn
           int     (*ia_start)             /* connect, confirm method */
                           __P((struct pklcd *));
           struct  sockaddr_x25 ia_dstaddr; /* reserve space for route dst */
   };
   
   /*
    * ``Link-Level'' extension to Routing Entry for upper level
    * packet switching via X.25 virtual circuits.
    */
   struct llinfo_x25 {
           LIST_ENTRY(llinfo_x25) lx_list;
           struct  rtentry *lx_rt;         /* back pointer to route */
           struct  pklcd *lx_lcd;          /* local connection block */
           struct  x25_ifaddr *lx_ia;      /* may not be same as rt_ifa */
           int     lx_state;               /* can't trust lcd->lcd_state */
           int     lx_flags;
           int     lx_timer;               /* for idle timeout */
           int     lx_family;              /* for dispatch */
   };
   
   /* States for lx_state */
   #define LXS_NEWBORN             0
   #define LXS_RESOLVING           1
   #define LXS_FREE                2
   #define LXS_CONNECTING          3
   #define LXS_CONNECTED           4
   #define LXS_DISCONNECTING       5
   #define LXS_LISTENING           6
   
   /* flags */
   #define LXF_VALID       0x1             /* Circuit is live, etc. */
   #define LXF_RTHELD      0x2             /* this lcb references rtentry */
   #define LXF_LISTEN      0x4             /* accepting incoming calls */
   
   /*
    * Definitions for accessing bitfields/bitslices inside X.25 structs
    */
   
   
   struct x25bitslice {
           unsigned int bs_mask;
           unsigned int bs_shift;
   };
   
   #define calling_addrlen 0
   #define called_addrlen  1
   #define q_bit           2
   #define d_bit           3
   #define fmt_identifier  4
   #define lc_group_number 1
   #define p_r             5
   #define m_bit           6
   #define p_s             7
   #define zilch           8
   
   #define X25GBITS(Arg, Index)    (((Arg) & x25_bitslice[(Index)].bs_mask) >> x25_bitslice[(Index)].bs_shift)
   #define X25SBITS(Arg, Index, Val)       (Arg) |= (((Val) << x25_bitslice[(Index)].bs_shift) & x25_bitslice[(Index)].bs_mask)
   #define X25CSBITS(Arg, Index, Val)      (Arg) = (((Val) << x25_bitslice[(Index)].bs_shift) & x25_bitslice[(Index)].bs_mask)
   
   extern const struct x25bitslice x25_bitslice[];
   
   
   #define ISOFIFTTYPE(i,t) ((i)->if_type == (t))
   #define ISISO8802(i) ((ISOFIFTTYPE(i, IFT_ETHER) || \
                          ISOFIFTTYPE(i, IFT_ISO88023) || \
                          ISOFIFTTYPE(i, IFT_ISO88024) || \
                          ISOFIFTTYPE(i, IFT_ISO88025) || \
                          ISOFIFTTYPE(i, IFT_ISO88026) || \
                          ISOFIFTTYPE(i, IFT_P10) || \
                          ISOFIFTTYPE(i, IFT_P80) || \
                          ISOFIFTTYPE(i, IFT_FDDI)))
   
   /*
    * miscellenous debugging info
    */
   struct mbuf_cache {
           int     mbc_size;
           int     mbc_num;
           int     mbc_oldsize;
           struct  mbuf **mbc_cache;
   };
   
   #if defined(_KERNEL) && defined(CCITT)
   #include <sys/queue.h>
   
   extern struct pkcb_q pkcb_q;
   TAILQ_HEAD(pklcdhead, pklcd);
   extern struct pklcdhead pk_listenhead;
   extern struct mbuf_cache pk_input_cache;
   extern struct mbuf_cache pk_output_cache;
   
   extern char     *pk_name[], *pk_state[];
   extern int      pk_t20, pk_t21, pk_t22, pk_t23;
   #endif

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