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Annotation of kernel/bsd/netccitt/pk_acct.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_acct.c   8.1 (Berkeley) 6/10/93
        !            63:  */
        !            64: 
        !            65: #include <sys/param.h>
        !            66: #include <sys/systm.h>
        !            67: #include <sys/namei.h>
        !            68: #include <sys/proc.h>
        !            69: #include <sys/vnode.h>
        !            70: #include <sys/kernel.h>
        !            71: #include <sys/file.h>
        !            72: #include <sys/socket.h>
        !            73: #include <sys/socketvar.h>
        !            74: 
        !            75: #include <net/if.h>
        !            76: 
        !            77: #include <netccitt/x25.h>
        !            78: #include <netccitt/pk.h>
        !            79: #include <netccitt/pk_var.h>
        !            80: #include <netccitt/x25acct.h>
        !            81: 
        !            82: 
        !            83: struct vnode *pkacctp;
        !            84: /* 
        !            85:  *  Turn on packet accounting
        !            86:  */
        !            87: 
        !            88: pk_accton (path)
        !            89:        char *path;
        !            90: {
        !            91:        register struct vnode *vp = NULL;
        !            92:        struct nameidata nd;
        !            93:        struct vnode *oacctp = pkacctp;
        !            94:        struct proc *p = current_proc();
        !            95:        int error;
        !            96: 
        !            97:        if (path == 0)
        !            98:                goto close;
        !            99:        NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, path, p);
        !           100:        if (error = vn_open (&nd, FWRITE, 0644))
        !           101:                return (error);
        !           102:        vp = nd.ni_vp;
        !           103:        VOP_UNLOCK(vp);
        !           104:        if (vp -> v_type != VREG) {
        !           105:                vrele (vp);
        !           106:                return (EACCES);
        !           107:        }
        !           108:        pkacctp = vp;
        !           109:        if (oacctp) {
        !           110:        close:
        !           111:                error = vn_close (oacctp, FWRITE, p -> p_ucred, p);
        !           112:        }
        !           113:        return (error);
        !           114: }
        !           115: 
        !           116: /* 
        !           117:  *  Write a record on the accounting file.
        !           118:  */
        !           119: 
        !           120: pk_acct (lcp)
        !           121: register struct pklcd *lcp;
        !           122: {
        !           123:        register struct vnode *vp;
        !           124:        register struct sockaddr_x25 *sa;
        !           125:        register char *src, *dst;
        !           126:        register int len;
        !           127:        register long etime;
        !           128:        static struct x25acct acbuf;
        !           129: 
        !           130:        if ((vp = pkacctp) == 0)
        !           131:                return;
        !           132:        bzero ((caddr_t)&acbuf, sizeof (acbuf));
        !           133:        if (lcp -> lcd_ceaddr != 0)
        !           134:                sa = lcp -> lcd_ceaddr;
        !           135:        else if (lcp -> lcd_craddr != 0) {
        !           136:                sa = lcp -> lcd_craddr;
        !           137:                acbuf.x25acct_callin = 1;
        !           138:        } else
        !           139:                return;
        !           140: 
        !           141:        if (sa -> x25_opts.op_flags & X25_REVERSE_CHARGE)
        !           142:                acbuf.x25acct_revcharge = 1;
        !           143:        acbuf.x25acct_stime = lcp -> lcd_stime;
        !           144:        acbuf.x25acct_etime = time.tv_sec - acbuf.x25acct_stime;
        !           145:        acbuf.x25acct_uid = current_proc() -> p_cred -> p_ruid;
        !           146:        acbuf.x25acct_psize = sa -> x25_opts.op_psize;
        !           147:        acbuf.x25acct_net = sa -> x25_net;
        !           148:        /*
        !           149:         * Convert address to bcd
        !           150:         */
        !           151:        src = sa -> x25_addr;
        !           152:        dst = acbuf.x25acct_addr;
        !           153:        for (len = 0; *src; len++)
        !           154:                if (len & 01)
        !           155:                        *dst++ |= *src++ & 0xf;
        !           156:                else
        !           157:                        *dst = *src++ << 4;
        !           158:        acbuf.x25acct_addrlen = len;
        !           159: 
        !           160:        bcopy (sa -> x25_udata, acbuf.x25acct_udata,
        !           161:                sizeof (acbuf.x25acct_udata));
        !           162:        acbuf.x25acct_txcnt = lcp -> lcd_txcnt;
        !           163:        acbuf.x25acct_rxcnt = lcp -> lcd_rxcnt;
        !           164: 
        !           165:        (void) vn_rdwr(UIO_WRITE, vp, (caddr_t)&acbuf, sizeof (acbuf),
        !           166:                (off_t)0, UIO_SYSSPACE, IO_UNIT|IO_APPEND,
        !           167:                current_proc() -> p_ucred, (int *)0,
        !           168:                (struct proc *)0);
        !           169: }

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