/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include "uucp.h"

#ifdef D_PROTOCOL
#include <dk.h>

#define XBUFSIZ 1024
time_t time();
static jmp_buf Dfailbuf;
extern int drdblk();

/*
 * Datakit protocol
 */
/* ARGSUSED */
static void
dalarm(sig)
int sig;
{
        longjmp(Dfailbuf,1);
}

static void (*dsig)();
#ifndef V8
static short dkrmode[3] = { DKR_BLOCK, 0, 0 };
static short dkeof[3] = { 106, 0, 0 };  /* End of File signal */
#endif

/*
 * turn on protocol
 */
int
dturnon()
{
#ifdef V8
        extern int dkp_ld;
#endif

        dsig=signal(SIGALRM, dalarm);
#ifdef V8
        if (dkproto(Ofn, dkp_ld) < 0)
           {
                DEBUG(3, "%s\n", "No dkp_ld");
                return(-1);
           }
#else
        if((*Ioctl)(Ofn, DIOCRMODE, dkrmode) < 0) {
            int ret;
            ret=(*Ioctl)(Ofn, DIOCRMODE, dkrmode);
            DEBUG(4, "dturnon: ret=%d, ", ret);
            DEBUG(4, "Ofn=%d, ", Ofn);
            DEBUG(4, "errno=%d\n", errno);
            return(-1);
        }
#endif /* V8 */
        return(0);
}

int
dturnoff()
{
        (void) signal(SIGALRM, dsig);
        return(0);
}

/*
 * write message across Datakit link
 *      type    -> message type
 *      str     -> message body (ascii string)
 *      fn      -> Datakit file descriptor
 * return
 *      SUCCESS -> message sent
 *      FAIL    -> write failed
 */
int
dwrmsg(type, str, fn)
register char *str;
int fn;
char type;
{
        register char *s;
        char bufr[XBUFSIZ];

        bufr[0] = type;
        s = &bufr[1];
        while (*str)
                *s++ = *str++;
        *s = '\0';
        if (*(--s) == '\n')
                *s = '\0';
        return((*Write)(fn, bufr, (unsigned) strlen(bufr) + 1) < 0 ? FAIL : SUCCESS);
}

/*
 * read message from Datakit link
 *      str     -> message buffer
 *      fn      -> Datakit file descriptor
 * return
 *      FAIL    -> send timed out
 *      SUCCESS -> ok message in str
 */
int
drdmsg(str, fn)
register char *str;
{

        register int len;

        if(setjmp(Dfailbuf))
                return(FAIL);

        (void) alarm(60);
        for (;;) {
                if( (len = (*Read)(fn, str, XBUFSIZ)) <= 0) {
                        (void) alarm(0);
                        return(FAIL);
                }
                str += len;
                if (*(str - 1) == '\0')
                        break;
        }
        (void) alarm(0);
        return(SUCCESS);
}

/*
 * read data from file fp1 and write
 * on Datakit link
 *      fp1     -> file descriptor
 *      fn      -> Datakit descriptor
 * returns:
 *      FAIL    ->failure in Datakit link
 *      SUCCESS -> ok
 */
int
dwrdata(fp1, fn)
FILE *fp1;
{
        register int fd1;
        register int len, ret;
        unsigned long bytes;
        char bufr[XBUFSIZ];

        bytes = 0L;
        fd1 = fileno( fp1 );
        while ((len = read( fd1, bufr, XBUFSIZ )) > 0) {
                bytes += len;
                putfilesize(bytes);
                ret = (*Write)(fn, bufr, (unsigned) len);
                if (ret != len) {
                        return(FAIL);
                }
                if (len != XBUFSIZ)
                        break;
        }
        ASSERT(len >= 0, "DISK READ ERROR", strerror(errno), len);
#ifndef V8
        (*Ioctl)(fn, DIOCXCTL, dkeof);
#endif
        ret = (*Write)(fn, bufr, (unsigned) 0);
        return(SUCCESS);
}

/*
 * read data from Datakit link and
 * write into file
 *      fp2     -> file descriptor
 *      fn      -> Datakit descriptor
 * returns:
 *      SUCCESS -> ok
 *      FAIL    -> failure on Datakit link
 */
int
drddata(fn, fp2)
FILE *fp2;
{
        register int fd2;
        register int len;
        register int ret = SUCCESS;
        unsigned long bytes;
        char bufr[XBUFSIZ];

        bytes = 0L;
        fd2 = fileno( fp2 );
        for (;;) {
                len = drdblk(bufr, XBUFSIZ, fn);
                if (len < 0) {
                        return(FAIL);
                }
                bytes += len;
                putfilesize(bytes);
                if( ret == SUCCESS && write( fd2, bufr, len ) != len )
                        ret = errno;
                if (len < XBUFSIZ)
                        break;
        }
        return(ret);
}

/*
 * read block from Datakit link
 * reads are timed
 *      blk     -> address of buffer
 *      len     -> size to read
 *      fn      -> Datakit descriptor
 * returns:
 *      FAIL    -> link error timeout on link
 *      i       -> # of bytes read
 */
int
drdblk(blk, len,  fn)
register char *blk;
{
        register int i, ret;
        struct dkqqabo  why;

        if(setjmp(Dfailbuf))
                return(FAIL);

        for (i = 0; i < len; i += ret) {
                (void) alarm(60);
                if ((ret = (*Read)(fn, blk, (unsigned) len - i)) < 0) {
                        (void) alarm(0);
                        return(FAIL);
                }
                blk += ret;
                if (ret == 0) { /* zero length block contains only EOF signal */
                        ioctl(fn, DIOCQQABO, &why);
                        if (why.rcv_ctlchar != dkeof[0])
                                i = FAIL;
                        break;
                }
        }
        (void) alarm(0);
        return(i);
}
#endif /* D_PROTOCOL */