455 lines
10 KiB
C
455 lines
10 KiB
C
/*****************************************************************************
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*
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* $Id: ymsend.c,v 1.14 2005/10/11 20:49:48 mbse Exp $
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* Purpose ...............: Ymodem sender
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*
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*****************************************************************************
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* Copyright (C) 1997-2005
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*****************************************************************************/
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#include "../config.h"
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#include "../lib/mbselib.h"
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#include "../lib/mbse.h"
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#include "ttyio.h"
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#include "zmmisc.h"
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#include "transfer.h"
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#include "openport.h"
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#include "timeout.h"
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#include "term.h"
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#include "ymsend.h"
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#define MAX_BLOCK 8192
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#define sendline(c) PUTCHAR((c & 0377))
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FILE *input_f;
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char Crcflg;
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char Lastrx;
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int Fullname = 0; /* transmit full pathname */
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int Filesleft;
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int Totalleft;
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int bytes_sent;
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int firstsec;
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int Optiong; /* Let it rip no wait for sector ACK's */
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int Totsecs; /* total number of sectors this file */
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char *txbuf;
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size_t blklen = 128; /* length of transmitted records */
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int zmodem_requested = FALSE;
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static int no_unixmode;
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struct timeval starttime, endtime;
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struct timezone tz;
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int skipsize;
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extern int Rxtimeout;
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static int wctxpn(char *);
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static int getnak(void);
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static int wctx(int);
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static int wcputsec(char *, int, size_t);
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static size_t filbuf(char *, size_t);
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int ymsndfiles(down_list *lst, int use1k)
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{
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int maxrc = 0;
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down_list *tmpf;
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Syslog('+', "%s: start send files", protname());
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txbuf = malloc(MAX_BLOCK);
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/*
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* Count files to transmit
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*/
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Totalleft = Filesleft = 0;
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for (tmpf = lst; tmpf; tmpf = tmpf->next) {
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if (tmpf->remote) {
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Filesleft++;
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Totalleft += tmpf->size;
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}
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}
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Syslog('x', "%s: %d files, size %d bytes", protname(), Filesleft, Totalleft);
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/*
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* This is not documented as auto start sequence, but a lot of terminal
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* programs seem to react on this.
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*/
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if (protocol == ZM_YMODEM)
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PUTSTR((char *)"rb\r");
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for (tmpf = lst; tmpf && (maxrc < 2); tmpf = tmpf->next) {
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if (tmpf->remote) {
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bytes_sent = 0;
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skipsize = 0L;
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Totsecs = 0;
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switch (wctxpn(tmpf->remote)) {
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case TERROR: Syslog('x', "wctxpn returns error");
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tmpf->failed = TRUE;
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maxrc = 2;
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break;
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case ZSKIP: Syslog('x', "wctxpn returns skip");
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tmpf->failed = TRUE;
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break;
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case OK: gettimeofday(&starttime, &tz);
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if ((blklen == 128) && use1k) {
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Syslog('x', "%s: will use 1K blocks", protname());
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blklen = 1024;
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}
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if (wctx(tmpf->size) == TERROR) {
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Syslog('+', "%s: wctx returned error", protname());
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tmpf->failed = TRUE;
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} else {
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tmpf->sent = TRUE;
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gettimeofday(&endtime, &tz);
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Syslog('+', "%s: OK %s", protname(),
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transfertime(starttime, endtime, (unsigned int)tmpf->size - skipsize, TRUE));
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}
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}
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} else if (maxrc == 0) {
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tmpf->failed = TRUE;
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}
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if (unlink(tmpf->remote))
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Syslog('+', "%s: could not unlink %s", protname(), tmpf->remote);
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}
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if (maxrc == 2) {
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canit(1);
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purgeline(50);
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} else {
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if (protocol == ZM_YMODEM) {
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/*
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* Send empty filename to signal end of batch
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*/
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wctxpn((char *)"");
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}
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}
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if (txbuf)
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free(txbuf);
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txbuf = NULL;
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io_mode(0, 1);
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Syslog('+', "%s: end send files rc=%d", protname(), maxrc);
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return (maxrc < 2)?0:maxrc;
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}
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/*
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* generate and transmit pathname block consisting of
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* pathname (null terminated),
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* file length, mode time and file mode in octal
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* as provided by the Unix fstat call.
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* N.B.: modifies the passed name, may extend it!
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*/
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static int wctxpn(char *fname)
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{
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register char *p, *q;
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char *name2;
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struct stat f;
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name2 = alloca(PATH_MAX+1);
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if ((input_f = fopen(fname, "r"))) {
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fstat(fileno(input_f), &f);
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Syslog('+', "%s: send \"%s\"", protname(), MBSE_SS(fname));
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Syslog('+', "%s: size %lu bytes, dated %s", protname(), (unsigned int)f.st_size, rfcdate(f.st_mtime));
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if (protocol == ZM_XMODEM) {
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if (*fname) {
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snprintf(name2, PATH_MAX +1, "Sending %s, %d blocks: ", fname, (int) (f.st_size >> 7));
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PUTSTR(name2);
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Enter(1);
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}
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PUTSTR((char *)"Give your local XMODEM receive command now.");
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Enter(1);
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return OK;
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}
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} else {
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/*
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* Reset, this normally happens for the ymodem end of batch block.
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*/
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f.st_size = 0;
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f.st_mtime = 0;
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f.st_mode = 0;
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}
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if (!zmodem_requested)
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if (getnak()) {
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Syslog('+', "%s: timeout sending filename %s", protname(), MBSE_SS(fname));
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return TERROR;
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}
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q = (char *) 0;
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for (p = fname, q = txbuf ; *p; )
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if ((*q++ = *p++) == '/' && !Fullname)
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q = txbuf;
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*q++ = 0;
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p = q;
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while (q < (txbuf + MAX_BLOCK))
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*q++ = 0;
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/*
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* note that we may lose some information here in case mode_t is wider than an
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* int. But i believe sending %lo instead of %o _could_ break compatability
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*/
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if ((input_f != stdin) && *fname)
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snprintf(p, MAXBLOCK + 1024, "%u %o %o 0 %d %d", (int) f.st_size, (int) f.st_mtime,
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(unsigned int)((no_unixmode) ? 0 : f.st_mode), Filesleft, Totalleft);
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Totalleft -= f.st_size;
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if (--Filesleft <= 0)
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Totalleft = 0;
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if (Totalleft < 0)
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Totalleft = 0;
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purgeline(1);
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if (wcputsec(txbuf, 0, 128) == TERROR) {
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Syslog('+', "%s: failed to send filename", protname());
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return TERROR;
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}
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return OK;
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}
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/*
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* Get NAK, C or G
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*/
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static int getnak(void)
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{
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int firstch;
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int tries = 0;
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Syslog('x', "getnak()");
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Lastrx = 0;
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for (;;) {
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tries++;
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switch (firstch = GETCHAR(10)) {
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case TIMEOUT:
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Syslog('x', "getnak: timeout try %d", tries);
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/* 50 seconds are enough (was 30, 26-11-2004 MB) */
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if (tries == 5) {
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Syslog('x', "Timeout on pathname");
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return TRUE;
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}
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continue;
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case WANTG:
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Syslog('x', "getnak: got WANTG");
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io_mode(0, 2); /* Set cbreak, XON/XOFF, etc. */
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if (!Optiong)
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Syslog('+', "%s: using Ymodem-G", protname());
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Optiong = TRUE;
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blklen=1024;
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Crcflg = TRUE;
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return FALSE;
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case WANTCRC:
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Syslog('x', "getnak: got WANTCRC");
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Crcflg = TRUE;
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return FALSE;
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case NAK:
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Syslog('x', "getnak: got NAK");
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return FALSE;
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case CAN:
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Syslog('x', "getnak: got CAN");
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if ((firstch = GETCHAR(2)) == CAN && Lastrx == CAN) {
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Syslog('+', "%s: Receiver cancelled", protname());
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return TRUE;
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}
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default:
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Syslog('x', "got %d", firstch);
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break;
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}
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Lastrx = firstch;
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}
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Syslog('x', "getnak: done");
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}
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static int wctx(int bytes_total)
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{
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register size_t thisblklen;
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register int sectnum, attempts, firstch;
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firstsec=TRUE;
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thisblklen = blklen;
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Syslog('x', "wctx: file length=%ld, blklen=%d", bytes_total, blklen);
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while ((firstch = GETCHAR(Rxtimeout)) != NAK && firstch != WANTCRC
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&& firstch != WANTG && firstch != TIMEOUT && firstch != CAN);
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if (firstch == CAN) {
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Syslog('+', "%s: receiver Cancelled during transfer", protname());
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return TERROR;
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}
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if (firstch == WANTCRC)
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Crcflg = TRUE;
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if (firstch == WANTG)
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Crcflg = TRUE;
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sectnum = 0;
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for (;;) {
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if (bytes_total <= (bytes_sent + 896L))
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thisblklen = 128;
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if ( !filbuf(txbuf, thisblklen))
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break;
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if (wcputsec(txbuf, ++sectnum, thisblklen) == TERROR)
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return TERROR;
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bytes_sent += thisblklen;
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/*
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* Keep connections alive
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*/
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Nopper();
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alarm_on();
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}
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fclose(input_f);
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attempts = 0;
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do {
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purgeline(5);
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PUTCHAR(EOT);
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++attempts;
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} while ((firstch = (GETCHAR(Rxtimeout)) != ACK) && attempts < RETRYMAX);
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if (attempts == RETRYMAX) {
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Syslog('x', "No ACK on EOT");
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return TERROR;
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} else
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return OK;
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}
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static int wcputsec(char *buf, int sectnum, size_t cseclen)
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{
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int Checksum, wcj;
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char *cp;
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unsigned oldcrc;
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int firstch;
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int attempts;
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firstch = 0; /* part of logic to detect CAN CAN */
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Syslog('x', "%s: wcputsec: sectnum %d, len %d, %s", protname(), sectnum, cseclen, Crcflg ? "crc":"checksum");
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for (attempts = 0; attempts <= RETRYMAX; attempts++) {
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Lastrx = firstch;
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sendline(cseclen == 1024 ? STX:SOH);
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sendline(sectnum);
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sendline((-sectnum -1));
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oldcrc = Checksum = 0;
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for (wcj = cseclen, cp = buf; --wcj >= 0; ) {
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sendline(*cp);
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oldcrc = updcrc16((0377& *cp), oldcrc);
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Checksum += *cp++;
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}
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if (Crcflg) {
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oldcrc = updcrc16(0, updcrc16(0, oldcrc));
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sendline((int)oldcrc >> 8);
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sendline((int)oldcrc);
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} else {
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sendline(Checksum);
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}
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if (Optiong) {
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firstsec = FALSE;
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return OK;
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}
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firstch = GETCHAR(Rxtimeout);
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gotnak:
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switch (firstch) {
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case CAN:
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Syslog('x', "got CAN");
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if(Lastrx == CAN) {
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cancan:
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Syslog('x', "Cancelled");
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return TERROR;
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}
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break;
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case TIMEOUT:
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Syslog('x', "Timeout on sector ACK");
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continue;
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case WANTCRC:
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if (firstsec)
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Crcflg = TRUE;
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case NAK:
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Syslog('+', "%s: got NAK on sector %d", protname(), sectnum);
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purgeline(20);
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continue;
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case ACK:
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firstsec=FALSE;
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Totsecs += (cseclen>>7);
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return OK;
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case TERROR:
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Syslog('x', "Got burst for sector ACK");
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break;
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default:
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Syslog('x', "Got %02x for sector ACK", firstch);
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break;
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}
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for (;;) {
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Lastrx = firstch;
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if ((firstch = GETCHAR(Rxtimeout)) == TIMEOUT)
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break;
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if (firstch == NAK || firstch == WANTCRC)
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goto gotnak;
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if (firstch == CAN && Lastrx == CAN)
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goto cancan;
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}
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}
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Syslog('x', "Retry Count Exceeded");
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return TERROR;
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}
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/*
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* fill buf with count chars padding with ^Z for CPM
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*/
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static size_t filbuf(char *buf, size_t count)
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{
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size_t m;
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m = read(fileno(input_f), buf, count);
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if (m <= 0)
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return 0;
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while (m < count)
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buf[m++] = 032;
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return count;
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}
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