633 lines
15 KiB
C
633 lines
15 KiB
C
/*****************************************************************************
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*
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* $Id$
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* Purpose ...............: Zmodem receive
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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/users.h"
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#include "ttyio.h"
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#include "transfer.h"
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#include "zmmisc.h"
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#include "zmrecv.h"
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#include "ymrecv.h"
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#include "openport.h"
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#include "timeout.h"
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#include "input.h"
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static FILE *fout = NULL;
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char *curfile = NULL;
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off_t rxbytes;
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static int Eofseen; /* indicates cpm eof (^Z) has been received */
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static int errors;
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long sbytes;
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struct timeval starttime, endtime;
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struct timezone tz;
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#define DEFBYTL 2000000000L /* default rx file size */
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long Bytesleft; /* number of bytes of incoming file left */
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static long Modtime; /* Unix style mod time for incoming file */
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static int Filemode; /* Unix style mode for incoming file */
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static int Thisbinary = TRUE; /* current file is to be received in bin mode */
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char *secbuf=0; /* "sector" buffer */
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static int tryzhdrtype;
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static char zconv; /* ZMODEM file conversion request */
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static char zmanag; /* ZMODEM file management request */
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static char ztrans; /* ZMODEM file transport request */
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static int tryz(void);
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static int rzfiles(void);
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static int rzfile(void);
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static void zmputs(char*);
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static int ackbibi(void);
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static long getfree(void);
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extern unsigned long rcvdbytes;
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extern int zmodem_requested;
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/*
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* Receive files with Zmodem, Ymodem or Xmodem.
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* This receiver will figure out what to do, you should
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* be able to send anything.
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*/
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int zmrcvfiles(int want1k, int wantg)
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{
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int rc;
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Syslog('+', "%s: start receive", protname());
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zsendline_init();
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if (secbuf == NULL)
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secbuf = malloc(MAXBLOCK+1);
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tryzhdrtype = ZRINIT;
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if ((rc = tryz()) < 0) {
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Syslog('+', "%s: could not initiate receive, rc=%d", protname(), rc);
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} else {
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if (rc == 0) {
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if (protocol == ZM_ZMODEM) {
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Syslog('+', "%s: switching to Ymodem", protname());
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protocol = ZM_YMODEM;
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}
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rc = ymrcvfiles(want1k, wantg);
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goto fubar;
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}
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/*
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* Zmodem receiver
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*/
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switch (rc) {
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case ZCOMPL: rc = 0;
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break;
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case ZFILE: rc = rzfiles();
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break;
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}
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}
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fubar:
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if (fout) {
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if (closeit(0)) {
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WriteError("%s: Error closing file", protname);
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}
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}
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if (secbuf)
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free(secbuf);
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secbuf = NULL;
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io_mode(0, 1); /* Normal raw mode */
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/*
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* Some programs send some garbage after the transfer, eat these.
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* This also introduces a pause after the transfer, some clients
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* need this.
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*/
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purgeline(200);
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Syslog('+', "%s: end receive rc=%d", protname(), rc);
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return abs(rc);
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}
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/*
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* Initialize for Zmodem receive attempt, try to activate Zmodem sender
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* Handles ZSINIT frame
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* Return ZFILE if Zmodem filename received, -1 on error,
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* ZCOMPL if transaction finished, else 0: can be ymodem.
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*/
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int tryz(void)
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{
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int c, n;
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int cmdzack1flg;
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if (protocol != ZM_ZMODEM)
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return 0;
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for (n = zmodem_requested ?15:10; --n >= 0; ) {
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/*
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* Set buffer length (0) and capability flags
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*/
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Syslog('z', "tryz attempt %d", n);
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stohdr(0L);
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Txhdr[ZF0] = CANFC32|CANFDX|CANOVIO;
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if (Zctlesc)
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Txhdr[ZF0] |= TESCCTL;
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zshhdr(tryzhdrtype, Txhdr);
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if (tryzhdrtype == ZSKIP) /* Don't skip too far */
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tryzhdrtype = ZRINIT; /* CAF 8-21-87 */
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again:
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switch (zgethdr(Rxhdr)) {
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case ZRQINIT: continue;
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case ZEOF: continue;
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case TIMEOUT: Syslog('z', "Zmodem: tryz() timeout attempt %d", n);
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continue;
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case ZFILE: zconv = Rxhdr[ZF0];
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if (!zconv) {
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Syslog('z', "*** !zconv %d", zconv);
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zconv = ZCBIN;
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}
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zmanag = Rxhdr[ZF1];
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ztrans = Rxhdr[ZF2];
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tryzhdrtype = ZRINIT;
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c = zrdata(secbuf, MAXBLOCK);
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io_mode(0, 3);
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if (c == GOTCRCW) {
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Syslog('z', "tryz return ZFILE");
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return ZFILE;
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}
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zshhdr(ZNAK, Txhdr);
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goto again;
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case ZSINIT: /* this once was:
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* Zctlesc = TESCCTL & Rxhdr[ZF0];
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* trouble: if rz get --escape flag:
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* - it sends TESCCTL to sz,
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* get a ZSINIT _without_ TESCCTL (yeah - sender didn't know),
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* overwrites Zctlesc flag ...
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* - sender receives TESCCTL and uses "|=..."
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* so: sz escapes, but rz doesn't unescape ... not good.
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*/
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Zctlesc |= TESCCTL & Rxhdr[ZF0];
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if (zrdata(Attn, ZATTNLEN) == GOTCRCW) {
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stohdr(1L);
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zshhdr(ZACK, Txhdr);
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goto again;
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}
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zshhdr(ZNAK, Txhdr);
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goto again;
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case ZFREECNT: stohdr(getfree());
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zshhdr(ZACK, Txhdr);
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goto again;
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case ZCOMMAND: cmdzack1flg = Rxhdr[ZF0];
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if (zrdata(secbuf, MAXBLOCK) == GOTCRCW) {
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if (cmdzack1flg & ZCACK1)
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stohdr(0L);
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else
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Syslog('+', "Zmodem: request for command \"%s\" ignored", printable(secbuf,-32));
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stohdr(0L);
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do {
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zshhdr(ZCOMPL, Txhdr);
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} while (++errors<20 && zgethdr(Rxhdr) != ZFIN);
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return ackbibi();
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}
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zshhdr(ZNAK, Txhdr);
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goto again;
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case ZCOMPL: goto again;
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case ZRINIT: Syslog('z', "tryz: got ZRINIT");
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return TERROR;
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case ZFIN: /* do not beleive in first ZFIN */
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ackbibi();
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return ZCOMPL;
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case TERROR:
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case HANGUP:
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case ZCAN: return TERROR;
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default: continue;
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}
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}
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return 0;
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}
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/*
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* Receive 1 or more files with ZMODEM protocol
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*/
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int rzfiles(void)
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{
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int c;
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for (;;) {
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switch (c = rzfile()) {
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case ZEOF:
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case ZSKIP:
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case ZFERR: switch (tryz()) {
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case ZCOMPL: return OK;
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default: return TERROR;
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case ZFILE: break;
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}
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continue;
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default: return c;
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case TERROR: return TERROR;
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}
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}
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/* NOTREACHED */
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}
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/*
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* Receive a file with ZMODEM protocol
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* Assumes file name frame is in secbuf
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*/
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int rzfile(void)
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{
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int c, n;
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Eofseen=FALSE;
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rxbytes = 0l;
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if ((c = procheader(secbuf))) {
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return (tryzhdrtype = c);
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}
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n = 20;
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for (;;) {
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Syslog('z', "rxbytes %ld", rxbytes);
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stohdr(rxbytes);
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zshhdr(ZRPOS, Txhdr);
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nxthdr:
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switch (c = zgethdr(Rxhdr)) {
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default: Syslog('z', "rzfile: Wrong header %d", c);
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if ( --n < 0) {
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Syslog('+', "Zmodem: wrong header %d", c);
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return TERROR;
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}
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continue;
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case ZCAN: Syslog('+', "Zmodem: sender CANcelled");
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return TERROR;
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case ZNAK: if ( --n < 0) {
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Syslog('+', "Zmodem: Got ZNAK");
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return TERROR;
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}
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continue;
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case TIMEOUT: if ( --n < 0) {
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Syslog('z', "Zmodem: TIMEOUT");
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return TERROR;
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}
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continue;
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case ZFILE: zrdata(secbuf, MAXBLOCK);
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continue;
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case ZEOF: if (rclhdr(Rxhdr) != rxbytes) {
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/*
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* Ignore eof if it's at wrong place - force
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* a timeout because the eof might have gone
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* out before we sent our zrpos.
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*/
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errors = 0;
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goto nxthdr;
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}
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if (closeit(1)) {
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tryzhdrtype = ZFERR;
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Syslog('+', "Zmodem: error closing file");
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return TERROR;
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}
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fout = NULL;
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Syslog('z', "rzfile: normal EOF");
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return c;
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case HANGUP: Syslog('+', "Zmodem: Lost Carrier");
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return TERROR;
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case TERROR: /* Too much garbage in header search error */
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if (--n < 0) {
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Syslog('+', "Zmodem: Too many errors");
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return TERROR;
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}
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zmputs(Attn);
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continue;
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case ZSKIP: Modtime = 1;
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closeit(1);
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Syslog('+', "Zmodem: Sender SKIPPED file");
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return c;
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case ZDATA: if (rclhdr(Rxhdr) != rxbytes) {
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if ( --n < 0) {
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Syslog('+', "Zmodem: Data has bad address");
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return TERROR;
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}
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zmputs(Attn);
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continue;
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}
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moredata:
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Syslog('Z', "%7ld ZMODEM%s ", rxbytes, Crc32r?" CRC-32":"");
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Nopper();
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alarm_on();
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switch (c = zrdata(secbuf, MAXBLOCK)) {
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case ZCAN: Syslog('+', "Zmodem: sender CANcelled");
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return TERROR;
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case HANGUP: Syslog('+', "Zmodem: Lost Carrier");
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return TERROR;
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case TERROR: /* CRC error */
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if (--n < 0) {
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Syslog('+', "Zmodem: Too many errors");
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return TERROR;
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}
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zmputs(Attn);
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continue;
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case TIMEOUT: if ( --n < 0) {
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Syslog('+', "Zmodem: TIMEOUT");
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return TERROR;
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}
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continue;
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case GOTCRCW: n = 20;
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putsec(secbuf, Rxcount);
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rxbytes += Rxcount;
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stohdr(rxbytes);
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PUTCHAR(XON);
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zshhdr(ZACK, Txhdr);
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goto nxthdr;
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case GOTCRCQ: n = 20;
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putsec(secbuf, Rxcount);
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rxbytes += Rxcount;
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stohdr(rxbytes);
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zshhdr(ZACK, Txhdr);
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goto moredata;
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case GOTCRCG: n = 20;
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putsec(secbuf, Rxcount);
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rxbytes += Rxcount;
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goto moredata;
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case GOTCRCE: n = 20;
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putsec(secbuf, Rxcount);
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rxbytes += Rxcount;
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goto nxthdr;
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}
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}
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}
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}
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/*
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* Send a string to the modem, processing for \336 (sleep 1 sec)
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* and \335 (break signal)
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*/
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void zmputs(char *s)
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{
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int c;
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Syslog('z', "zmputs: \"%s\"", printable(s, strlen(s)));
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while (*s) {
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switch (c = *s++) {
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case '\336': Syslog('z', "zmputs: sleep(1)");
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sleep(1);
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continue;
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case '\335': Syslog('z', "zmputs: send break");
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sendbrk();
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continue;
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default: PUTCHAR(c);
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}
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}
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}
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int closeit(int success)
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{
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struct utimbuf ut;
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int rc;
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Syslog('z', "closeit(%d)", success);
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if ((fout == NULL) || (curfile == NULL)) {
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Syslog('+', "closeit(), nothing to close");
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return 1;
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}
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rc = fclose(fout);
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fout = NULL;
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if (rc == 0) {
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ut.actime = Modtime;
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ut.modtime = Modtime;
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if ((rc = utime(curfile, &ut)))
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WriteError("$utime failed");
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}
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free(curfile);
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curfile = NULL;
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sbytes = rxbytes - sbytes;
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gettimeofday(&endtime, &tz);
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if (success)
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Syslog('+', "%s: OK %s", protname(), transfertime(starttime, endtime, sbytes, FALSE));
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else
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Syslog('+', "%s: dropped after %lu bytes", protname(), sbytes);
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rcvdbytes += sbytes;
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return rc;
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}
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/*
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* Ack a ZFIN packet, let byegones be byegones
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*/
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int ackbibi(void)
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{
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int n;
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int c;
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Syslog('z', "ackbibi:");
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stohdr(0L);
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for (n=3; --n>=0; ) {
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zshhdr(ZFIN, Txhdr);
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switch ((c = GETCHAR(10))) {
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case 'O': GETCHAR(1); /* Discard 2nd 'O' */
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Syslog('z', "Zmodem: ackbibi complete");
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return ZCOMPL;
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case TERROR:
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case HANGUP: Syslog('z', "Zmodem: ackbibi got %d, ignore",c);
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return 0;
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case TIMEOUT:
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default: Syslog('z', "Zmodem: ackbibi got '%s', continue", printablec(c));
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break;
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}
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}
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return ZCOMPL;
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}
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/*
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* Process incoming file information header
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*/
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int procheader(char *Name)
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{
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register char *openmode, *p;
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static int dummy;
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char ctt[32];
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Syslog('z', "procheader \"%s\"",printable(Name,0));
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/* set default parameters and overrides */
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openmode = (char *)"w";
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/*
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* Check slashes in the name
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*/
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p = strrchr(Name,'/');
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if (p) {
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p++;
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if (!*p) {
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/* alert - file name ended in with a / */
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Syslog('!', "%s: file name ends with a /, skipped: %s", protname(), Name);
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return ZFERR;
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}
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Name = p;
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Syslog('z', "filename converted to \"%s\"", MBSE_SS(Name));
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}
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if (strlen(Name) > 80) {
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Syslog('!', "%s: file name received is longer then 80 characters, skipped: %s", protname(), Name);
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return ZFERR;
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}
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Syslog('z', "zmanag=%d", zmanag);
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Syslog('z', "zconv=%d", zconv);
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/*
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* Process ZMODEM remote file management requests
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*/
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if (!Thisbinary && zconv == ZCNL) /* Remote ASCII override */
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Thisbinary = FALSE;
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if (zconv == ZCBIN) /* Remote Binary override */
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Thisbinary = TRUE;
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if (zmanag == ZMAPND)
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openmode = (char *)"a";
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Syslog('z', "Thisbinary %s", Thisbinary ?"TRUE":"FALSE");
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Bytesleft = DEFBYTL;
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Filemode = 0;
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Modtime = 0L;
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Eofseen = FALSE;
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p = Name + 1 + strlen(Name);
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if (*p) { /* file coming from Unix or DOS system */
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sscanf(p, "%ld%lo%o%o%d%d%d%d", &Bytesleft, &Modtime, &Filemode, &dummy, &dummy, &dummy, &dummy, &dummy);
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strcpy(ctt, rfcdate(Modtime));
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} else {
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Syslog('z', "File coming from a CP/M system");
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}
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Syslog('+', "%s: \"%s\" %ld bytes, %s mode %o", protname(), Name, Bytesleft, ctt, Filemode);
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if (curfile)
|
|
free(curfile);
|
|
curfile = NULL;
|
|
|
|
curfile = xstrcpy(CFG.bbs_usersdir);
|
|
curfile = xstrcat(curfile, (char *)"/");
|
|
curfile = xstrcat(curfile, exitinfo.Name);
|
|
curfile = xstrcat(curfile, (char *)"/upl/");
|
|
curfile = xstrcat(curfile, Name);
|
|
Syslog('z', "try open %s mode \"%s\"", curfile, openmode);
|
|
if ((fout = fopen(curfile, openmode)) == NULL) {
|
|
WriteError("$Can't open %s mode %s", curfile, openmode);
|
|
}
|
|
|
|
gettimeofday(&starttime, &tz);
|
|
sbytes = rxbytes = 0;
|
|
|
|
Syslog('z', "result %s", fout ? "Ok":"Failed");
|
|
|
|
/* if (Bytesleft == rxbytes) { FIXME: if file already received, use this.
|
|
Syslog('+', "Zmodem: Skipping %s", Name);
|
|
fout = NULL;
|
|
return ZSKIP;
|
|
} else */ if (!fout)
|
|
return ZFERR;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Putsec writes the n characters of buf to receive file fout.
|
|
* If not in binary mode, carriage returns, and all characters
|
|
* starting with CPMEOF are discarded.
|
|
*/
|
|
int putsec(char *buf, int n)
|
|
{
|
|
register char *p;
|
|
|
|
if (n == 0)
|
|
return OK;
|
|
|
|
if (Thisbinary) {
|
|
if (fwrite(buf, n, 1, fout) != 1)
|
|
return ERROR;
|
|
} else {
|
|
if (Eofseen)
|
|
return OK;
|
|
for (p = buf; --n>=0; ++p ) {
|
|
if ( *p == '\r')
|
|
continue;
|
|
if (*p == SUB) {
|
|
Eofseen=TRUE;
|
|
return OK;
|
|
}
|
|
putc(*p ,fout);
|
|
}
|
|
}
|
|
return OK;
|
|
}
|
|
|
|
|
|
|
|
long getfree(void)
|
|
{
|
|
struct statfs sfs;
|
|
char *temp;
|
|
|
|
temp = calloc(PATH_MAX, sizeof(char));
|
|
snprintf(temp, PATH_MAX, "%s/%s/upl", CFG.bbs_usersdir, exitinfo.Name);
|
|
|
|
if (statfs(temp, &sfs) != 0) {
|
|
WriteError("$cannot statfs \"%s\", assume enough space", temp);
|
|
free(temp);
|
|
return -1L;
|
|
}
|
|
|
|
free(temp);
|
|
return (sfs.f_bsize * sfs.f_bfree);
|
|
}
|
|
|
|
|