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zm_send.c
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2014-05-19
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/**********************************************************************
* Send.c: File transmission routines for xprzmodem.library;
* Original Version 2.10, 12 February 1991, by Rick Huebner.
* Based closely on Chuck Forsberg's sz.c example ZModem code,
* but too pervasively modified to even think of detailing the changes.
* Released to the Public Domain; do as you like with this code.
*
* Version 2.50, 15 November 1991, CRC-32 additions by William M. Perkins.
* Version 2.51 29, January 1992, RX_timout fix by John Tillema
* Version 2.52 6 March 1992, Very minor fix with compiled 020 library
* by William M. Perkins.
*
**********************************************************************/
/*#include <proto/all.h>
#include <exec/types.h>
#include <ctype.h>
#include <stdio.h>*/
#include <string.h>
#include "xproto.h"
#include "zmodem.h"
#include "xprzmodem.h"
#ifdef DEBUGLOG
extern void *DebugLog;
#endif
/* Proto fⁿr Inlines */
static short getzrxinit(struct Vars *v);
static void sendbatch(struct Vars *v);
static short sendone(struct Vars *v);
static short sendname(struct Vars *v);
static short zsendfile(struct Vars *v, short blen);
static short zsendfdata(struct Vars *v);
static short getinsync(struct Vars *v);
static void saybibi(struct Vars *v);
/**********************************************************
* long XProtocolSend(struct XPR_IO *xio)
*
* Main file transmission routine; called by comm program
**********************************************************/
long XProtocolSend(struct XPR_IO *xio)
{
struct Vars *v;
short err;
/* Perform common setup and initializations */
if (! (v = setup(xio)) )
return XPRS_FAILURE;
/* was 600, set to 300 to fix so it uploads correctly */
v->Rxtimeout = 300;
v->Wantfcs32 = TRUE;
v->Rxflags = 0;
/* Transfer the files */
zmputs(v, "rz\r");
stohdr(v, 0L);
zshhdr(v, ZRQINIT);
sendbuf(v);
if (getzrxinit(v) == ERROR) {
err=TRUE;
upderr(v, "Senden abgebrochen oder Timeout!");
}
else
sendbatch(v);
/* Clean up and return */
if (err = v->Errcnt) {
err=TRUE;
upderr(v, "Datei(en) wegen ▄bertragunsfehlern ⁿbersprungen!");
}
else
updmsg(v, "▄bertragung erfolgreich beendet.");
FreeMem(v, (long) sizeof(struct Vars));
return (err) ? XPRS_FAILURE : XPRS_SUCCESS;
} /* End of long XProtocolSend() */
/**********************************************************
* short getzrxinit(struct Vars *v)
*
* Negotiate with receiver to start a file transfer
**********************************************************/
static short getzrxinit(struct Vars *v)
{
short n;
for (n = v->ErrorLimit; --n >= 0; )
{
/* Check for abort from comm program */
if (xpr_chkabort())
return ERROR;
switch (zgethdr(v))
{
case ZCHALLENGE: /* Echo receiver's challenge number */
stohdr(v, v->Rxpos);
zshhdr(v, ZACK);
sendbuf(v);
continue;
case ZCOMMAND: /* They didn't see our ZRQINIT; try again */
stohdr(v, 0L);
zshhdr(v, ZRQINIT);
sendbuf(v);
continue;
case ZRINIT: /* Receiver ready; get transfer parameters */
v->Rxflags = 0xFF & v->Rxhdr[ZF0];
v->Txfcs32 = (v->Wantfcs32 && (v->Rxflags & CANFC32));
v->Rxbuflen = ((USHORT) v->Rxhdr[ZP1] << 8) | v->Rxhdr[ZP0];
#ifdef DEBUGLOG
mysprintf(v->Msgbuf, "Txfcs32=%ld Rxbuflen=%ld Tframlen=%ld\n",
(long) v->Txfcs32, (long) v->Rxbuflen, (long) v->Tframlen);
dlog(v, v->Msgbuf);
#endif
/* Use shortest of the two side's max frame lengths */
if (v->Tframlen && (! v->Rxbuflen || v->Tframlen < v->Rxbuflen))
v->Rxbuflen = v->Tframlen;
#ifdef DEBUGLOG
mysprintf(v->Msgbuf, "Rxbuflen=%ld\n", (long) v->Rxbuflen);
dlog(v, v->Msgbuf);
#endif
return OK;
case ZCAN:
case RCDO:
case TIMEOUT:
upderr(v, v->Msgbuf);
return ERROR;
case ZRQINIT:
if (v->Rxhdr[ZF0] == ZCOMMAND)
continue;
/* fallthrough... */
default:
zshhdr(v, ZNAK);
sendbuf(v);
continue;
}
}
return ERROR;
} /* End of short getzrxinit() */
/**********************************************************
* void sendbatch(struct Vars *v)
*
* Send a batch of files
**********************************************************/
static void sendbatch(struct Vars *v)
{
UBYTE single, done = FALSE;
long fstate;
single = FALSE;
fstate = xpr_ffirst(v->Filename, v->io.xpr_filename);
if (! fstate)
{
upderr(v, "Keine Dateien gefunden.");
return;
}
/* If using templates, keep getting names & sending until done */
while (! done)
{
if (sendone(v) == ERROR)
return;
if (single)
break;
fstate = xpr_fnext(fstate, v->Filename, v->io.xpr_filename);
done = ! fstate;
}
/* End batch and return; if we never got started, just cancel receiver */
if (v->Filcnt)
saybibi(v);
else
canit(v);
} /* End of void sendbatch() */
/**********************************************************
* short sendone(struct Vars *v)
*
* Send the file named in v->Filename
**********************************************************/
static short sendone(struct Vars *v)
{
struct SetupVars *sv;
#ifdef DEBUGLOG
mysprintf(v->Msgbuf, "*** Sending %s\n", v->Filename);
dlog(v, v->Msgbuf);
#endif
/* Display name of file being sent for user */
v->xpru.xpru_updatemask = XPRU_FILENAME;
v->xpru.xpru_filename = v->Filename;
xpr_update(&v->xpru);
/* Set text/binary mode according to options before opening file */
set_textmode(v);
/* Open the file, if possible */
if (! (v->File = bfopen(v, "r")))
{
++v->Errcnt;
upderr(v, "Kann Datei nicht ÷ffnen (wird ⁿbersprungen)");
return OK; /* pass over it, there may be others */
}
++v->Filcnt;
getsystime(&v->Starttime);
/* Kick off the file transfer */
sv = (void *) v->io.xpr_data;
switch (sendname(v))
{
case ERROR:
++v->Errcnt;
return ERROR;
case OK:
bfclose(v);
break;
}
return OK;
} /* End of short sendone() */
/**********************************************************
* short sendname(struct Vars *v)
*
* Build file info block consisting of file name, length,
* time, and mode
**********************************************************/
static short sendname(struct Vars *v)
{
UBYTE *p, *q, buff [32];
/* Initialize comm program transfer status display */
v->Fsize = xpr_finfo(v->Filename, 1L);
v->xpru.xpru_updatemask = XPRU_PROTOCOL | XPRU_FILESIZE | XPRU_MSG
| XPRU_BLOCKS | XPRU_ERRORS | XPRU_TIMEOUTS | XPRU_BLOCKCHECK
| XPRU_BYTES | XPRU_EXPECTTIME | XPRU_ELAPSEDTIME | XPRU_DATARATE;
v->xpru.xpru_protocol = "ZModem";
v->xpru.xpru_filesize = v->Fsize;
v->xpru.xpru_msg = "Sende Datei...";
v->xpru.xpru_blocks = v->xpru.xpru_errors = v->xpru.xpru_timeouts = 0;
v->xpru.xpru_blockcheck = v->Crc32t ? "CRC-32" : "CRC-16";
v->xpru.xpru_bytes = v->Strtpos = 0;
update_rate(v);
xpr_update(&v->xpru);
/*sv = (void *) xpr_data;*/
/* extract outgoing file name without directory path */
for (p = v->Filename, q = v->Pktbuf ; *p; ++p, ++q)
if ((*q = *p) == '/' || *q == ':')
q = v->Pktbuf - 1;
*q = '\0';
p = ++q;
/* Zero out remainder of file info packet */
memset(p, 0, sizeof(v->Pktbuf) - (p - v->Pktbuf));
/* Store file size, timestamp, and mode in info packet */
/*
* XPR spec doesn't provide a way to get the file timestamp or file mode,
* so we'll just fake it with the current time and a dummy 0.
*/
stcl_o(buff, getsystime(NULL) + UnixTimeOffset);
/* amiga.lib mysprintf() can't do %lo format, so we do it the hard way */
/* Yes, octal; ZModem was originally done on Unix, and they like octal there */
mysprintf(p, "%ld %s 0", (v->Fsize < 0) ? 0L : v->Fsize,buff);
/* Send filename packet */
return zsendfile(v, (short) (p - v->Pktbuf + strlen(p) + 1));
} /* End of short sendname() */
/**********************************************************
* short zsendfile(struct Vars *v, short blen)
*
* Send the filename packet and see if receiver will accept
* file
**********************************************************/
static short zsendfile(struct Vars *v, short blen)
{
short c;
while (TRUE)
{
v->Txhdr[ZF0] = v->Lzconv; /* Text or Binary mode; from config string */
v->Txhdr[ZF1] = LZMANAG; /* Default file management mode */
v->Txhdr[ZF2] = LZTRANS; /* Default file transport mode */
v->Txhdr[ZF3] = 0;
zsbhdr(v, ZFILE);
zsdata(v, blen, ZCRCW);
sendbuf(v);
again:
/* Check for abort from comm program */
if (xpr_chkabort())
{
bfclose(v);
return ERROR;
}
switch (c = zgethdr(v))
{
case ZRINIT:
goto again;
case ZCAN:
case ZCRC:
case RCDO:
case TIMEOUT:
case ZABORT:
case ZFIN:
upderr(v, v->Msgbuf);
return ERROR;
case ZSKIP: /* Receiver doesn't want this one */
upderr(v, "SKIP-Paket empfangen!");
bfclose(v);
return c;
case ZRPOS: /* Receiver wants it; this is starting position */
bfseek(v, v->Rxpos);
v->Strtpos = v->Txpos = v->Rxpos;
xpr_sflush();
v->Modemcount = 0;
return zsendfdata(v);
}
}
} /* End of short zsendfile() */
/**********************************************************
* short zsendfdata(struct Vars *v)
*
* Send the file data
**********************************************************/
extern int zmodemmode;
static short zsendfdata(struct Vars *v)
{
short c, e, blklen, goodbytes = 0;
USHORT framelen, maxblklen, goodneeded = 512;
/* Figure out max data packet size to send */
maxblklen = KSIZE;
if (v->Rxbuflen && maxblklen > v->Rxbuflen)
maxblklen = v->Rxbuflen;
blklen = (v->Baud < 1200) ? 256 : KSIZE;
if (blklen > maxblklen)
blklen = maxblklen;
if( !zmodemmode )
{
maxblklen = min( 1024, maxblklen );
blklen = min( 1024, blklen );
}
#ifdef DEBUGLOG
mysprintf(v->Msgbuf, "Rxbuflen=%ld blklen=%ld\n", (long) v->Rxbuflen,
(long) blklen);
dlog(v, v->Msgbuf);
#endif
/* If an interruption happened, handle it; else keep sending data */
somemore:
while (char_avail(v))
{
/* Check for another incoming packet while discarding line noise */
switch (readock(v, 1))
{
case CAN:
case RCDO:
case ZPAD:
break;
default:
continue;
}
waitack:
#ifdef DEBUGLOG
dlog(v, "--- At waitack\n");
#endif
switch (c = getinsync(v))
{
default:
upderr(v, "▄bertraung abgebrochen.");
bfclose(v);
return ERROR;
case ZSKIP: /* Receiver changed its mind and wants to skip the file */
return c;
case ZACK: /* ACK at end of frame; resume sending data */
break;
case ZRPOS: /* An error; resend data from last good point */
blklen >>= 2;
if (blklen < MINBLOCK)
blklen = MINBLOCK;
if (goodneeded < MAXGOODNEEDED)
goodneeded <<= 1;
v->xpru.xpru_updatemask = XPRU_ERRORS;
++v->xpru.xpru_errors;
xpr_update(&v->xpru);
break;
case ZRINIT:
updmsg(v, "▄bertragung erfolgreich beendet.");
return OK;
}
}
/* Transmit ZDATA frame header */
framelen = v->Rxbuflen;
stohdr(v, v->Txpos);
zsbhdr(v, ZDATA);
/* Keep sending data packets until finished or interrupted */
do
{
/* Read next chunk of file data */
c = bfread(v, v->Pktbuf, (long) blklen);
/* Figure out how to handle this data packet */
if (c < blklen)
e = ZCRCE; /* If end of file, this is last data packet */
else if (v->Rxbuflen && (framelen -= c) <= 0)
e = ZCRCW; /* If end of frame, ask for ACK */
else
e = ZCRCG; /* Else tell receiver to expect more data packets */
zsdata(v, c, e); /* Send the packet */
sendbuf(v);
/* Update comm program status display */
v->xpru.xpru_updatemask = XPRU_BLOCKS | XPRU_BLOCKSIZE | XPRU_BYTES
| XPRU_EXPECTTIME | XPRU_ELAPSEDTIME | XPRU_DATARATE
| XPRU_BLOCKCHECK;
++v->xpru.xpru_blocks;
v->xpru.xpru_blocksize = c;
v->xpru.xpru_blockcheck = v->Crc32t ? "CRC-32" : "CRC-16";
v->xpru.xpru_bytes = v->Txpos += c;
update_rate(v);
xpr_update(&v->xpru);
/*
* If we've been sending smaller than normal packets, see if it's
* time to bump the packet size up a notch yet
*/
if (blklen < maxblklen && (goodbytes += c) >= goodneeded)
{
blklen <<= 1;
if (blklen > maxblklen)
blklen = maxblklen;
goodbytes = 0;
#ifdef DEBUGLOG
mysprintf(v->Msgbuf, "Bumping packet size to %ld at %ld\n",
(long) blklen, v->Txpos);
dlog(v, v->Msgbuf);
#endif
}
/* Give comm program its timeslice if it needs one */
/* Check for abort from comm program */
if (xpr_chkabort())
goto aborted;
/* If this was last packet in frame, go wait for ACK from receiver */
if (e == ZCRCW)
goto waitack;
/*
* Check if receiver trying to interrupt us; look for incoming packet
* while discarding line noise
*/
while (char_avail(v))
{
switch (readock(v, 1))
{
case CAN:
case RCDO:
case ZPAD:
/* Interruption detected; stop sending and process complaint */
#ifdef DEBUGLOG
dlog(v, "--- Interrupted send\n");
#endif
zsdata(v, 0, ZCRCE);
sendbuf(v);
goto waitack;
}
}
}
while (e == ZCRCG); /* If no interruption, keep sending data packets */
/* Done sending file data; send EOF and wait for receiver to acknowledge */
while (TRUE)
{
updmsg(v, "Sende EOF.");
stohdr(v, v->Txpos);
zsbhdr(v, ZEOF);
sendbuf(v);
switch (c = getinsync(v))
{
case ZACK:
continue;
case ZRPOS:
goto somemore;
case ZRINIT:
updmsg(v, "EOF bestΣtigt.");
++v->Starttime.tv_secs;
update_rate(v);
v->xpru.xpru_updatemask = XPRU_EXPECTTIME | XPRU_ELAPSEDTIME
| XPRU_DATARATE;
xpr_update(&v->xpru);
return OK;
case ZSKIP:
return c;
default:
aborted:
upderr(v, "▄bertragung abgebrochen!");
bfclose(v);
return ERROR;
}
}
} /* End of short zsendfdata() */
/**********************************************************
* short getinsync(struct Vars *v)
*
* Respond to receiver's complaint, get back in sync with
* receiver
**********************************************************/
static short getinsync(struct Vars *v)
{
short c;
while (TRUE)
{
#ifdef DEBUGLOG
dlog(v, "--- At getinsync\n");
#endif
c = zgethdr(v);
xpr_sflush();
v->Modemcount = 0;
switch (c)
{
case ZCAN:
case ZABORT:
case ZFIN:
case RCDO:
case TIMEOUT:
upderr(v, v->Msgbuf);
return ERROR;
case ZRPOS:
bfseek(v, v->Rxpos);
v->Txpos = v->Rxpos;
mysprintf(v->Msgbuf, "Zurⁿck ab Offset %ld", v->Txpos);
upderr(v, v->Msgbuf);
return c;
case ZSKIP:
upderr(v, "SKIP-Paket empfangen!");
/* fallthrough... */
case ZRINIT:
bfclose(v);
/* fallthrough... */
case ZACK:
return c;
default:
zsbhdr(v, ZNAK);
sendbuf(v);
continue;
}
}
} /* End of short getinsync() */
/**********************************************************
* void saybibi(struct Vars *v)
*
* End of batch transmission; disengage cleanly from receiver
**********************************************************/
static void saybibi(struct Vars *v)
{
while (TRUE)
{
stohdr(v, 0L);
zsbhdr(v, ZFIN);
sendbuf(v);
switch (zgethdr(v))
{
case ZFIN:
sendline(v, 'O');
sendline(v, 'O');
sendbuf(v);
/* fallthrough... */
case ZCAN:
case RCDO:
case TIMEOUT:
return;
}
}
} /* End of void saybibi() */
/* End of Send.c source */