usr/include/netccitt/pk_var.h

/*
 * Copyright (c) Computing Centre, University of British Columbia, 1985
 * Copyright (C) Computer Science Department IV,
 *               University of Erlangen-Nuremberg, Germany, 1990, 1991, 1992
 * 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 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
 *
 */

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 ...*/
        caddr_t lcd_upnext;             /* reference for lcd_upper() */
        int     (*lcd_send)();          /* if X.25 front end, direct connect */
        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 */
        struct  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 */
        short   pk_maxlcn;              /* local copy of xc_maxlcn */
        int     (*pk_lloutput) ();      /* link level output procedure */
        caddr_t (*pk_llctlinput) ();    /* link level ctloutput procedure */
        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 */
        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 {
        struct  llinfo_x25 *lx_next;    /* chain together in linked list */
        struct  llinfo_x25 *lx_prev;    /* chain together in linked 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 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)
extern struct pkcb_q pkcb_q;
struct  pklcd *pk_listenhead;
struct  pklcd *pk_attach();

extern char     *pk_name[], *pk_state[];
int     pk_t20, pk_t21, pk_t22, pk_t23;
#endif