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Annotation of kernel/bsd/netccitt/pk_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:  *     @(#)pk_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/socket.h>
        !            69: #include <sys/protosw.h>
        !            70: #include <sys/socketvar.h>
        !            71: #include <sys/errno.h>
        !            72: #include <sys/malloc.h>
        !            73: 
        !            74: #include <net/if.h>
        !            75: 
        !            76: #include <netccitt/x25.h>
        !            77: #include <netccitt/pk.h>
        !            78: #include <netccitt/pk_var.h>
        !            79: 
        !            80: char   *pk_state[] = {
        !            81:        "Listen",       "Ready",        "Received-Call",
        !            82:        "Sent-Call",    "Data-Transfer","Received-Clear",
        !            83:        "Sent-Clear",
        !            84: };
        !            85: 
        !            86: char   *pk_name[] = {
        !            87:        "Call",         "Call-Conf",    "Clear",
        !            88:        "Clear-Conf",   "Data",         "Intr",         "Intr-Conf",
        !            89:        "Rr",           "Rnr",          "Reset",        "Reset-Conf",
        !            90:        "Restart",      "Restart-Conf", "Reject",       "Diagnostic",
        !            91:        "Invalid"
        !            92: };
        !            93: 
        !            94: pk_trace (xcp, m, dir)
        !            95: struct x25config *xcp;
        !            96: register struct mbuf *m;
        !            97: char *dir;
        !            98: {
        !            99:        register char *s;
        !           100:        struct x25_packet *xp = mtod(m, struct x25_packet *);
        !           101:        register int i, len = 0, cnt = 0;
        !           102: 
        !           103:        if (xcp -> xc_ptrace == 0)
        !           104:                return;
        !           105: 
        !           106:        i = pk_decode (xp) / MAXSTATES;
        !           107:        for (; m; m = m -> m_next) {
        !           108:                len = len + m -> m_len;
        !           109:                ++cnt;
        !           110:        }
        !           111:        printf ("LCN=%d %s:     %s      #=%d, len=%d ",
        !           112:                LCN(xp), dir, pk_name[i], cnt, len);
        !           113:        for (s = (char *) xp, i = 0; i < 5; ++i, ++s)
        !           114:                printf ("%x ", (int) * s & 0xff);
        !           115:        printf ("\n");
        !           116: }
        !           117: 
        !           118: mbuf_cache(c, m)
        !           119: register struct mbuf_cache *c;
        !           120: struct mbuf *m;
        !           121: {
        !           122:        register struct mbuf **mp;
        !           123: 
        !           124:        if (c->mbc_size != c->mbc_oldsize) {
        !           125:                unsigned zero_size, copy_size;
        !           126:                unsigned new_size = c->mbc_size * sizeof(m);
        !           127:                caddr_t cache = (caddr_t)c->mbc_cache;
        !           128: 
        !           129:                if (new_size) {
        !           130: //                     c->mbc_cache = (struct mbuf **)
        !           131: //                             malloc(new_size, M_MBUF, M_NOWAIT);
        !           132:                        MALLOC(c->mbc_cache, struct mbuf **, new_size, M_MBUF, M_NOWAIT);
        !           133:                        if (c->mbc_cache == 0) {
        !           134:                                c->mbc_cache = (struct mbuf **)cache;
        !           135:                                return;
        !           136:                        }
        !           137:                        c->mbc_num %= c->mbc_size;
        !           138:                } else
        !           139:                        c->mbc_cache = 0;
        !           140:                if (c->mbc_size < c->mbc_oldsize) {
        !           141:                        register struct mbuf **mplim;
        !           142:                        mp = c->mbc_size + (struct mbuf **)cache;
        !           143:                        mplim = c->mbc_oldsize + (struct mbuf **)cache;
        !           144:                        while (mp < mplim)
        !           145:                                m_freem(*mp++);
        !           146:                        zero_size = 0;
        !           147:                } else
        !           148:                        zero_size = (c->mbc_size - c->mbc_oldsize) * sizeof(m);
        !           149:                copy_size = new_size - zero_size;
        !           150:                c->mbc_oldsize = c->mbc_size;
        !           151:                if (copy_size)
        !           152:                        bcopy(cache, (caddr_t)c->mbc_cache, copy_size);
        !           153:                if (cache)
        !           154:                        free(cache, M_MBUF);
        !           155:                if (zero_size)
        !           156:                        bzero(copy_size + (caddr_t)c->mbc_cache, zero_size);
        !           157:        }
        !           158:        if (c->mbc_size == 0)
        !           159:                return;
        !           160:        mp = c->mbc_cache + c->mbc_num;
        !           161:        c->mbc_num = (1 + c->mbc_num) % c->mbc_size;
        !           162:        if (*mp)
        !           163:                m_freem(*mp);
        !           164:        if (*mp = m_copym(m, 0, M_COPYALL, M_DONTWAIT))
        !           165:                (*mp)->m_flags |= m->m_flags & 0x08;
        !           166: }

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