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Annotation of kernel/bsd/netccitt/hd_debug.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*
        !            26:  * Copyright (c) University of British Columbia, 1984
        !            27:  * Copyright (c) 1990, 1993
        !            28:  *     The Regents of the University of California.  All rights reserved.
        !            29:  *
        !            30:  * This code is derived from software contributed to Berkeley by
        !            31:  * the Laboratory for Computation Vision and the Computer Science Department
        !            32:  * of the University of British Columbia.
        !            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:  *     @(#)hd_debug.c  8.1 (Berkeley) 6/10/93
        !            63:  */
        !            64: 
        !            65: #include <sys/param.h>
        !            66: #include <sys/systm.h>
        !            67: #include <sys/mbuf.h>
        !            68: #include <sys/domain.h>
        !            69: #include <sys/socket.h>
        !            70: #include <sys/protosw.h>
        !            71: #include <sys/errno.h>
        !            72: #include <sys/time.h>
        !            73: #include <sys/kernel.h>
        !            74: 
        !            75: #include <net/if.h>
        !            76: 
        !            77: #include <netccitt/hdlc.h>
        !            78: #include <netccitt/hd_var.h>
        !            79: #include <netccitt/x25.h>
        !            80: 
        !            81: #ifdef HDLCDEBUG
        !            82: #define NTRACE         32
        !            83: 
        !            84: struct hdlctrace {
        !            85:        struct  hdcb *ht_hdp;
        !            86:        short   ht_dir;
        !            87:        struct  mbuf *ht_frame;
        !            88:        struct  timeval ht_time;
        !            89: } hdtrace[NTRACE];
        !            90: 
        !            91: int    lasttracelogged, freezetrace;
        !            92: #endif
        !            93: 
        !            94: hd_trace (hdp, direction, frame)
        !            95: struct hdcb *hdp;
        !            96: register struct Hdlc_frame *frame;
        !            97: {
        !            98:        register char *s;
        !            99:        register int nr, pf, ns, i;
        !           100:        struct Hdlc_iframe *iframe = (struct Hdlc_iframe *) frame;
        !           101: 
        !           102: #ifdef HDLCDEBUG
        !           103:        hd_savetrace (hdp, direction, frame);
        !           104: #endif
        !           105:        if (hdp -> hd_xcp -> xc_ltrace) {
        !           106:                if (direction == RX)
        !           107:                        printf ("F-In:  ");
        !           108:                else if (direction == 2)
        !           109:                                printf ("F-Xmt: ");
        !           110:                        else
        !           111:                                printf ("F-Out:   ");
        !           112: 
        !           113:                nr = iframe -> nr;
        !           114:                pf = iframe -> pf;
        !           115:                ns = iframe -> ns;
        !           116: 
        !           117:                switch (hd_decode (hdp, frame)) {
        !           118:                case SABM: 
        !           119:                        printf ("SABM   : PF=%d\n", pf);
        !           120:                        break;
        !           121: 
        !           122:                case DISC: 
        !           123:                        printf ("DISC   : PF=%d\n", pf);
        !           124:                        break;
        !           125: 
        !           126:                case DM: 
        !           127:                        printf ("DM     : PF=%d\n", pf);
        !           128:                        break;
        !           129: 
        !           130:                case FRMR: 
        !           131:                        {
        !           132:                        register struct Frmr_frame *f = (struct Frmr_frame *)frame;
        !           133: 
        !           134:                        printf ("FRMR   : PF=%d, TEXT=", pf);
        !           135:                        for (s = (char *) frame, i = 0; i < 5; ++i, ++s)
        !           136:                                printf ("%x ", (int) * s & 0xff);
        !           137:                        printf ("\n");
        !           138:                        printf ("control=%x v(s)=%d v(r)=%d w%d x%d y%d z%d\n",
        !           139:                                f->frmr_control, f->frmr_ns, f->frmr_nr,
        !           140:                                f->frmr_w, f->frmr_x, f->frmr_y, f->frmr_z);
        !           141:                        break;
        !           142:                        }
        !           143: 
        !           144:                case UA: 
        !           145:                        printf ("UA     : PF=%d\n", pf);
        !           146:                        break;
        !           147: 
        !           148:                case RR: 
        !           149:                        printf ("RR     : N(R)=%d, PF=%d\n", nr, pf);
        !           150:                        break;
        !           151: 
        !           152:                case RNR: 
        !           153:                        printf ("RNR    : N(R)=%d, PF=%d\n", nr, pf);
        !           154:                        break;
        !           155: 
        !           156:                case REJ: 
        !           157:                        printf ("REJ    : N(R)=%d, PF=%d\n", nr, pf);
        !           158:                        break;
        !           159: 
        !           160:                case IFRAME: 
        !           161:                        {
        !           162:                        register struct mbuf *m;
        !           163:                        register int len = 0;
        !           164: 
        !           165:                        for(m = dtom (frame); m; m = m -> m_next)
        !           166:                                len += m -> m_len;
        !           167:                        len -= HDHEADERLN;
        !           168:                        printf ("IFRAME : N(R)=%d, PF=%d, N(S)=%d, DATA(%d)=",
        !           169:                                nr, pf, ns, len);
        !           170:                        for (s = (char *)iframe->i_field, i = 0; i < 3; ++i, ++s)
        !           171:                                printf ("%x ", (int) *s & 0xff);
        !           172:                        printf ("\n");
        !           173:                        break;
        !           174:                        }
        !           175: 
        !           176:                default: 
        !           177:                        printf ("ILLEGAL: ");
        !           178:                        for (s = (char *) frame, i = 0; i < 5; ++i, ++s)
        !           179:                                printf ("%x ", (int) *s & 0xff);
        !           180:                        printf ("\n");
        !           181:                }
        !           182: 
        !           183:        }
        !           184: }
        !           185: 
        !           186: #ifdef HDLCDEBUG
        !           187: static
        !           188: hd_savetrace (hdp, dir, frame)
        !           189: struct hdcb *hdp;
        !           190: struct Hdlc_frame *frame;
        !           191: {
        !           192:        register struct hdlctrace *htp;
        !           193:        register struct mbuf *m;
        !           194: 
        !           195:        if (freezetrace)
        !           196:                return;
        !           197:        htp = &hdtrace[lasttracelogged];
        !           198:        lasttracelogged = (lasttracelogged + 1) % NTRACE;
        !           199:        if (m = htp->ht_frame)
        !           200:                m_freem (m);
        !           201:        m = dtom (frame);
        !           202:        htp->ht_frame = m_copy (m, 0, m->m_len);
        !           203:        htp->ht_hdp = hdp;
        !           204:        htp->ht_dir = dir;
        !           205:        htp->ht_time = time;
        !           206: }
        !           207: 
        !           208: hd_dumptrace (hdp)
        !           209: struct hdcb *hdp;
        !           210: {
        !           211:        register int i, ltrace;
        !           212:        register struct hdlctrace *htp;
        !           213: 
        !           214:        freezetrace = 1;
        !           215:        hd_status (hdp);
        !           216:        printf ("retransmit queue:");
        !           217:        for (i = 0; i < 8; i++)
        !           218:                printf (" %x", hdp -> hd_retxq[i]);
        !           219:        printf ("\n");
        !           220:        ltrace = hdp -> hd_xcp -> xc_ltrace;
        !           221:        hdp -> hd_xcp -> xc_ltrace = 1;
        !           222:        for (i = 0; i < NTRACE; i++) {
        !           223:                htp = &hdtrace[(lasttracelogged + i) % NTRACE];
        !           224:                if (htp->ht_hdp != hdp || htp->ht_frame == 0)
        !           225:                        continue;
        !           226:                printf ("%d/%d  ", htp->ht_time.tv_sec & 0xff,
        !           227:                        htp->ht_time.tv_usec / 10000);
        !           228:                hd_trace (htp->ht_hdp, htp->ht_dir,
        !           229:                        mtod (htp->ht_frame, struct Hdlc_frame *));
        !           230:                m_freem (htp->ht_frame);
        !           231:                htp->ht_frame = 0;
        !           232:        }
        !           233:        hdp -> hd_xcp -> xc_ltrace = ltrace;
        !           234:        freezetrace = 0;
        !           235: }
        !           236: #endif

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