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Annotation of XNU/bsd/netccitt/pk_var.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /* 
        !            23:  * Copyright (c) Computing Centre, University of British Columbia, 1985 
        !            24:  * Copyright (C) Computer Science Department IV, 
        !            25:  *              University of Erlangen-Nuremberg, Germany, 1990, 1991, 1992
        !            26:  * Copyright (c) 1992, 1993
        !            27:  *     The Regents of the University of California.  All rights reserved.
        !            28:  * 
        !            29:  * This code is derived from software contributed to Berkeley by the
        !            30:  * Laboratory for Computation Vision and the Computer Science Department
        !            31:  * of the the University of British Columbia and the Computer Science
        !            32:  * Department (IV) of the University of Erlangen-Nuremberg, Germany.
        !            33:  *
        !            34:  * Redistribution and use in source and binary forms, with or without
        !            35:  * modification, are permitted provided that the following conditions
        !            36:  * are met:
        !            37:  * 1. Redistributions of source code must retain the above copyright
        !            38:  *    notice, this list of conditions and the following disclaimer.
        !            39:  * 2. Redistributions in binary form must reproduce the above copyright
        !            40:  *    notice, this list of conditions and the following disclaimer in the
        !            41:  *    documentation and/or other materials provided with the distribution.
        !            42:  * 3. All advertising materials mentioning features or use of this software
        !            43:  *    must display the following acknowledgement:
        !            44:  *     This product includes software developed by the University of
        !            45:  *     California, Berkeley and its contributors.
        !            46:  * 4. Neither the name of the University nor the names of its contributors
        !            47:  *    may be used to endorse or promote products derived from this software
        !            48:  *    without specific prior written permission.
        !            49:  *
        !            50:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            51:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            52:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            53:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            54:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            55:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            56:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            57:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            58:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            59:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            60:  * SUCH DAMAGE.
        !            61:  *
        !            62:  *     @(#)pk_var.h    8.1 (Berkeley) 6/10/93
        !            63:  */
        !            64: 
        !            65: /*
        !            66:  *
        !            67:  *  X.25 Logical Channel Descriptor
        !            68:  *
        !            69:  */
        !            70: 
        !            71: struct pklcd {
        !            72:        struct  pklcd_q {
        !            73:                struct  pklcd_q *q_forw;        /* debugging chain */
        !            74:                struct  pklcd_q *q_back;        /* debugging chain */
        !            75:        } lcd_q;
        !            76:        int     (*lcd_upper)();         /* switch to socket vs datagram vs ...*/
        !            77:        caddr_t lcd_upnext;             /* reference for lcd_upper() */
        !            78:        int     (*lcd_send)();          /* if X.25 front end, direct connect */
        !            79:        caddr_t lcd_downnext;           /* reference for lcd_send() */
        !            80:        short   lcd_lcn;                /* Logical channel number */
        !            81:        short   lcd_state;              /* Logical Channel state */
        !            82:        short   lcd_timer;              /* Various timer values */
        !            83:        short   lcd_dg_timer;           /* to reclaim idle datagram circuits */
        !            84:         bool   lcd_intrconf_pending;   /* Interrupt confirmation pending */
        !            85:        octet   lcd_intrdata;           /* Octet of incoming intr data */
        !            86:        char    lcd_retry;              /* Timer retry count */
        !            87:        char    lcd_rsn;                /* Seq no of last received packet */
        !            88:        char    lcd_ssn;                /* Seq no of next packet to send */
        !            89:        char    lcd_output_window;      /* Output flow control window */
        !            90:        char    lcd_input_window;       /* Input flow control window */
        !            91:        char    lcd_last_transmitted_pr;/* Last Pr value transmitted */
        !            92:         bool   lcd_rnr_condition;      /* Remote in busy condition */
        !            93:         bool   lcd_window_condition;   /* Output window size exceeded */
        !            94:         bool   lcd_reset_condition;    /* True, if waiting reset confirm */
        !            95:        bool    lcd_rxrnr_condition;    /* True, if we have sent rnr */
        !            96:        char    lcd_packetsize;         /* Maximum packet size */
        !            97:        char    lcd_windowsize;         /* Window size - both directions */
        !            98:         octet  lcd_closed_user_group;  /* Closed user group specification */
        !            99:        char    lcd_flags;              /* copy of sockaddr_x25 op_flags */
        !           100:        struct  mbuf *lcd_facilities;   /* user supplied facilities for cr */
        !           101:        struct  mbuf *lcd_template;     /* Address of response packet */
        !           102:        struct  socket *lcd_so;         /* Socket addr for connection */
        !           103:        struct  sockaddr_x25 *lcd_craddr;/* Calling address pointer */
        !           104:        struct  sockaddr_x25 *lcd_ceaddr;/* Called address pointer */
        !           105:        time_t  lcd_stime;              /* time circuit established */
        !           106:        long    lcd_txcnt;              /* Data packet transmit count */
        !           107:        long    lcd_rxcnt;              /* Data packet receive count */
        !           108:        short   lcd_intrcnt;            /* Interrupt packet transmit count */
        !           109:        struct  pklcd *lcd_listen;      /* Next lcd on listen queue */
        !           110:        struct  pkcb *lcd_pkp;          /* Network this lcd is attached to */
        !           111:        struct  mbuf *lcd_cps;          /* Complete Packet Sequence reassembly*/
        !           112:        long    lcd_cpsmax;             /* Max length for CPS */
        !           113:        struct  sockaddr_x25 lcd_faddr; /* Remote Address (Calling) */
        !           114:        struct  sockaddr_x25 lcd_laddr; /* Local Address (Called) */
        !           115:        struct  sockbuf lcd_sb;         /* alternate for datagram service */
        !           116: };
        !           117: 
        !           118: /*
        !           119:  * Per network information, allocated dynamically
        !           120:  * when a new network is configured.
        !           121:  */
        !           122: 
        !           123: struct pkcb {
        !           124:        struct pkcb_q {
        !           125:                struct pkcb_q *q_forw;
        !           126:                struct pkcb_q *q_backw;
        !           127:        } pk_q;
        !           128:        short   pk_state;               /* packet level status */
        !           129:        short   pk_maxlcn;              /* local copy of xc_maxlcn */
        !           130:        int     (*pk_lloutput) ();      /* link level output procedure */
        !           131:        caddr_t (*pk_llctlinput) ();    /* link level ctloutput procedure */
        !           132:        caddr_t pk_llnext;              /* handle for next level down */
        !           133:        struct  x25config *pk_xcp;      /* network specific configuration */
        !           134:        struct  x25_ifaddr *pk_ia;      /* backpointer to ifaddr */
        !           135:        struct  pklcd **pk_chan;        /* actual size == xc_maxlcn+1 */
        !           136:        short   pk_dxerole;             /* DXE role of PLE over LLC2 */
        !           137:        short   pk_restartcolls;        /* counting RESTART collisions til resolved */
        !           138:        struct  rtentry *pk_rt;         /* back pointer to route */
        !           139:        struct  rtentry *pk_llrt;       /* pointer to reverse mapping */
        !           140:        u_short pk_refcount;            /* ref count */
        !           141: };
        !           142: 
        !           143: #define FOR_ALL_PKCBS(p) for((p) = (struct pkcb *)(pkcb_q.q_forw); \
        !           144:                             (pkcb_q.q_forw != &pkcb_q) && ((struct pkcb_q *)(p) != &pkcb_q); \
        !           145:                             (p) = (struct pkcb *)((p) -> pk_q.q_forw))
        !           146: 
        !           147: #define        PQEMPTY         (pkcb_q.q_forw == &pkcb_q)
        !           148: 
        !           149: /*
        !           150:  *     Interface address, x25 version. Exactly one of these structures is 
        !           151:  *     allocated for each interface with an x25 address.
        !           152:  *
        !           153:  *     The ifaddr structure conatins the protocol-independent part
        !           154:  *     of the structure, and is assumed to be first.
        !           155:  */
        !           156: struct x25_ifaddr {
        !           157:        struct  ifaddr ia_ifa;          /* protocol-independent info */
        !           158: #define ia_ifp ia_ifa.ifa_ifp
        !           159: #define        ia_flags ia_ifa.ifa_flags
        !           160:        struct  x25config ia_xc;        /* network specific configuration */
        !           161:        struct  pkcb *ia_pkcb;
        !           162: #define ia_maxlcn ia_xc.xc_maxlcn
        !           163:        int     (*ia_start) ();         /* connect, confirm method */
        !           164:        struct  sockaddr_x25 ia_dstaddr; /* reserve space for route dst */
        !           165: };
        !           166: 
        !           167: /*
        !           168:  * ``Link-Level'' extension to Routing Entry for upper level
        !           169:  * packet switching via X.25 virtual circuits.
        !           170:  */
        !           171: struct llinfo_x25 {
        !           172:        struct  llinfo_x25 *lx_next;    /* chain together in linked list */
        !           173:        struct  llinfo_x25 *lx_prev;    /* chain together in linked list */
        !           174:        struct  rtentry *lx_rt;         /* back pointer to route */
        !           175:        struct  pklcd *lx_lcd;          /* local connection block */
        !           176:        struct  x25_ifaddr *lx_ia;      /* may not be same as rt_ifa */
        !           177:        int     lx_state;               /* can't trust lcd->lcd_state */
        !           178:        int     lx_flags;
        !           179:        int     lx_timer;               /* for idle timeout */
        !           180:        int     lx_family;              /* for dispatch */
        !           181: };
        !           182: 
        !           183: /* States for lx_state */
        !           184: #define LXS_NEWBORN            0
        !           185: #define LXS_RESOLVING          1
        !           186: #define LXS_FREE               2
        !           187: #define LXS_CONNECTING         3
        !           188: #define LXS_CONNECTED          4
        !           189: #define LXS_DISCONNECTING      5
        !           190: #define LXS_LISTENING          6
        !           191: 
        !           192: /* flags */
        !           193: #define LXF_VALID      0x1             /* Circuit is live, etc. */
        !           194: #define LXF_RTHELD     0x2             /* this lcb references rtentry */
        !           195: #define LXF_LISTEN     0x4             /* accepting incoming calls */
        !           196: 
        !           197: /*
        !           198:  * Definitions for accessing bitfields/bitslices inside X.25 structs
        !           199:  */
        !           200: 
        !           201: 
        !           202: struct x25bitslice {
        !           203:        unsigned int bs_mask;
        !           204:        unsigned int bs_shift;
        !           205: };
        !           206: 
        !           207: #define        calling_addrlen 0
        !           208: #define        called_addrlen  1
        !           209: #define        q_bit           2
        !           210: #define        d_bit           3
        !           211: #define        fmt_identifier  4
        !           212: #define        lc_group_number 1
        !           213: #define        p_r             5
        !           214: #define        m_bit           6
        !           215: #define        p_s             7
        !           216: #define        zilch           8
        !           217: 
        !           218: #define        X25GBITS(Arg, Index)    (((Arg) & x25_bitslice[(Index)].bs_mask) >> x25_bitslice[(Index)].bs_shift)
        !           219: #define        X25SBITS(Arg, Index, Val)       (Arg) |= (((Val) << x25_bitslice[(Index)].bs_shift) & x25_bitslice[(Index)].bs_mask)
        !           220: #define        X25CSBITS(Arg, Index, Val)      (Arg) = (((Val) << x25_bitslice[(Index)].bs_shift) & x25_bitslice[(Index)].bs_mask)
        !           221: 
        !           222: extern struct x25bitslice x25_bitslice[];
        !           223: 
        !           224: 
        !           225: #define ISOFIFTTYPE(i,t) ((i)->if_type == (t))
        !           226: #define ISISO8802(i) ((ISOFIFTTYPE(i, IFT_ETHER) || \
        !           227:                       ISOFIFTTYPE(i, IFT_ISO88023) || \
        !           228:                       ISOFIFTTYPE(i, IFT_ISO88024) || \
        !           229:                       ISOFIFTTYPE(i, IFT_ISO88025) || \
        !           230:                       ISOFIFTTYPE(i, IFT_ISO88026) || \
        !           231:                       ISOFIFTTYPE(i, IFT_P10) || \
        !           232:                       ISOFIFTTYPE(i, IFT_P80) || \
        !           233:                       ISOFIFTTYPE(i, IFT_FDDI)))
        !           234: 
        !           235: /*
        !           236:  * miscellenous debugging info
        !           237:  */
        !           238: struct mbuf_cache {
        !           239:        int     mbc_size;
        !           240:        int     mbc_num;
        !           241:        int     mbc_oldsize;
        !           242:        struct  mbuf **mbc_cache;
        !           243: };
        !           244: 
        !           245: #if defined(KERNEL) && defined(CCITT)
        !           246: extern struct pkcb_q pkcb_q;
        !           247: struct pklcd *pk_listenhead;
        !           248: struct pklcd *pk_attach();
        !           249: 
        !           250: extern char    *pk_name[], *pk_state[];
        !           251: int    pk_t20, pk_t21, pk_t22, pk_t23;
        !           252: #endif

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