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Annotation of Net2/netccitt/pk_var.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) University of British Columbia, 1984
        !             3:  * Copyright (c) 1990 The Regents of the University of California.
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * This code is derived from software contributed to Berkeley by
        !             7:  * the Laboratory for Computation Vision and the Computer Science Department
        !             8:  * of the University of British Columbia.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  *
        !            38:  *     @(#)pk_var.h    7.11 (Berkeley) 5/29/91
        !            39:  */
        !            40: 
        !            41: 
        !            42: /*
        !            43:  *
        !            44:  *  X.25 Logical Channel Descriptor
        !            45:  *
        !            46:  */
        !            47: 
        !            48: struct pklcd {
        !            49:        struct  pklcd_q {
        !            50:                struct  pklcd_q *q_forw;        /* debugging chain */
        !            51:                struct  pklcd_q *q_back;        /* debugging chain */
        !            52:        } lcd_q;
        !            53:        int     (*lcd_upper)();         /* switch to socket vs datagram vs ...*/
        !            54:        caddr_t lcd_upnext;             /* reference for lcd_upper() */
        !            55:        int     (*lcd_send)();          /* if X.25 front end, direct connect */
        !            56:        caddr_t lcd_downnext;           /* reference for lcd_send() */
        !            57:        short   lcd_lcn;                /* Logical channel number */
        !            58:        short   lcd_state;              /* Logical Channel state */
        !            59:        short   lcd_timer;              /* Various timer values */
        !            60:        short   lcd_dg_timer;           /* to reclaim idle datagram circuits */
        !            61:         bool   lcd_intrconf_pending;   /* Interrupt confirmation pending */
        !            62:        octet   lcd_intrdata;           /* Octet of incoming intr data */
        !            63:        char    lcd_retry;              /* Timer retry count */
        !            64:        char    lcd_rsn;                /* Seq no of last received packet */
        !            65:        char    lcd_ssn;                /* Seq no of next packet to send */
        !            66:        char    lcd_output_window;      /* Output flow control window */
        !            67:        char    lcd_input_window;       /* Input flow control window */
        !            68:        char    lcd_last_transmitted_pr;/* Last Pr value transmitted */
        !            69:         bool   lcd_rnr_condition;      /* Remote in busy condition */
        !            70:         bool   lcd_window_condition;   /* Output window size exceeded */
        !            71:         bool   lcd_reset_condition;    /* True, if waiting reset confirm */
        !            72:        bool    lcd_rxrnr_condition;    /* True, if we have sent rnr */
        !            73:        char    lcd_packetsize;         /* Maximum packet size */
        !            74:        char    lcd_windowsize;         /* Window size - both directions */
        !            75:         octet  lcd_closed_user_group;  /* Closed user group specification */
        !            76:        char    lcd_flags;              /* copy of sockaddr_x25 op_flags */
        !            77:        struct  mbuf *lcd_facilities;   /* user supplied facilities for cr */
        !            78:        struct  mbuf *lcd_template;     /* Address of response packet */
        !            79:        struct  socket *lcd_so;         /* Socket addr for connection */
        !            80:        struct  sockaddr_x25 *lcd_craddr;/* Calling address pointer */
        !            81:        struct  sockaddr_x25 *lcd_ceaddr;/* Called address pointer */
        !            82:        time_t  lcd_stime;              /* time circuit established */
        !            83:        long    lcd_txcnt;              /* Data packet transmit count */
        !            84:        long    lcd_rxcnt;              /* Data packet receive count */
        !            85:        short   lcd_intrcnt;            /* Interrupt packet transmit count */
        !            86:        struct  pklcd *lcd_listen;      /* Next lcd on listen queue */
        !            87:        struct  pkcb *lcd_pkp;          /* Network this lcd is attached to */
        !            88:        struct  mbuf *lcd_cps;          /* Complete Packet Sequence reassembly*/
        !            89:        long    lcd_cpsmax;             /* Max length for CPS */
        !            90:        struct  sockaddr_x25 lcd_faddr; /* Remote Address (Calling) */
        !            91:        struct  sockaddr_x25 lcd_laddr; /* Local Address (Called) */
        !            92:        struct  sockbuf lcd_sb;         /* alternate for datagram service */
        !            93: };
        !            94: 
        !            95: /*
        !            96:  * Per network information, allocated dynamically
        !            97:  * when a new network is configured.
        !            98:  */
        !            99: 
        !           100: struct pkcb {
        !           101:        struct  pkcb *pk_next;
        !           102:        short   pk_state;               /* packet level status */
        !           103:        short   pk_maxlcn;              /* local copy of xc_maxlcn */
        !           104:        int     (*pk_lloutput) ();      /* link level output procedure */
        !           105:        caddr_t pk_llnext;              /* handle for next level down */
        !           106:        struct  x25config *pk_xcp;      /* network specific configuration */
        !           107:        struct  x25_ifaddr *pk_ia;      /* backpointer to ifaddr */
        !           108:        struct  pklcd **pk_chan;        /* actual size == xc_maxlcn+1 */
        !           109: };
        !           110: /*
        !           111:  *     Interface address, x25 version. Exactly one of these structures is 
        !           112:  *     allocated for each interface with an x25 address.
        !           113:  *
        !           114:  *     The ifaddr structure conatins the protocol-independent part
        !           115:  *     of the structure, and is assumed to be first.
        !           116:  */
        !           117: struct x25_ifaddr {
        !           118:        struct  ifaddr ia_ifa;          /* protocol-independent info */
        !           119: #define ia_ifp ia_ifa.ifa_ifp
        !           120: #define        ia_flags ia_ifa.ifa_flags
        !           121:        struct  x25config ia_xc;        /* network specific configuration */
        !           122: #define ia_maxlcn ia_xc.xc_maxlcn
        !           123:        int     (*ia_start) ();         /* connect, confirm method */
        !           124:        struct  sockaddr_x25 ia_dstaddr; /* reserve space for route dst */
        !           125: };
        !           126: 
        !           127: /*
        !           128:  * ``Link-Level'' extension to Routing Entry for upper level
        !           129:  * packet switching via X.25 virtual circuits.
        !           130:  */
        !           131: struct llinfo_x25 {
        !           132:        struct  llinfo_x25 *lx_next;    /* chain together in linked list */
        !           133:        struct  llinfo_x25 *lx_prev;    /* chain together in linked list */
        !           134:        struct  rtentry *lx_rt;         /* back pointer to route */
        !           135:        struct  pklcd *lx_lcd;          /* local connection block */
        !           136:        struct  x25_ifaddr *lx_ia;      /* may not be same as rt_ifa */
        !           137:        int     lx_state;               /* can't trust lcd->lcd_state */
        !           138:        int     lx_flags;
        !           139:        int     lx_timer;               /* for idle timeout */
        !           140:        int     lx_family;              /* for dispatch */
        !           141: };
        !           142: 
        !           143: /* States for lx_state */
        !           144: #define LXS_NEWBORN            0
        !           145: #define LXS_RESOLVING          1
        !           146: #define LXS_FREE               2
        !           147: #define LXS_CONNECTING         3
        !           148: #define LXS_CONNECTED          4
        !           149: #define LXS_DISCONNECTING      5
        !           150: #define LXS_LISTENING          6
        !           151: 
        !           152: /* flags */
        !           153: #define LXF_VALID      0x1             /* Circuit is live, etc. */
        !           154: #define LXF_RTHELD     0x2             /* this lcb references rtentry */
        !           155: #define LXF_LISTEN     0x4             /* accepting incoming calls */
        !           156: 
        !           157: /*
        !           158:  * miscellenous debugging info
        !           159:  */
        !           160: struct mbuf_cache {
        !           161:        int     mbc_size;
        !           162:        int     mbc_num;
        !           163:        int     mbc_oldsize;
        !           164:        struct  mbuf **mbc_cache;
        !           165: };
        !           166: 
        !           167: #if defined(KERNEL) && defined(CCITT)
        !           168: struct pkcb *pkcbhead;         /* head of linked list of networks */
        !           169: struct pklcd *pk_listenhead;
        !           170: struct pklcd *pk_attach();
        !           171: 
        !           172: extern char    *pk_name[], *pk_state[];
        !           173: int    pk_t20, pk_t21, pk_t22, pk_t23;
        !           174: #endif

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