/* Send ZMODEM binary header hdr of type type */
void zsbhdr(int type, char *hdr)
{
register int n;
register unsigned short crc;
if (type == ZDATA)
for (n = Znulls; --n >= 0;)
xsendline(0);
xsendline(ZPAD);
xsendline(ZDLE);
Crc32t = Txfcs32;
if (Crc32t)
zsbh32(hdr, type);
else {
xsendline(ZBIN);
zsendline(type);
crc = updcrc(type, 0);
for (n = 4; --n >= 0; ++hdr) {
zsendline(*hdr);
crc = updcrc((0377 & *hdr), crc);
}
crc = updcrc(0, updcrc(0, crc));
zsendline(crc >> 8);
zsendline(crc);
}
if (type != ZDATA)
flushmo();
}
void zsda32(const char *buf, size_t length, int frameend)
{
int c;
unsigned long crc;
int i;
crc = 0xFFFFFFFFL;
zsendline_s(buf, length);
for (; length; length--) {
c = *buf & 0377;
crc = UPDC32(c, crc);
buf++;
}
xsendline(ZDLE);
xsendline(frameend);
crc = UPDC32(frameend, crc);
crc = ~crc;
for (i = 4; --i >= 0;) {
c = (int) crc;
if (c & 0140)
xsendline(lastsent = c);
else
zsendline(c);
crc >>= 8;
}
if (frameend == ZCRCW) {
xsendline(XON);
flushmo();
}
}
/* Send ZMODEM binary header hdr of type type */
void zsbhdr(int type, char *hdr)
{
vfile(F("zsbhdr: %s %lx"), frametypes[type+FTOFFSET], rclhdr(hdr));
/* if (type == ZDATA)
for (n = Znulls; --n >=0; )
xsendline(0);
*/
xsendline(ZPAD);
xsendline(ZDLE);
//Pete (El Supremo) This looks wrong but it is correct - the code fails if == is used
if ((Crc32t = Txfcs32)) {
int n;
UNSL long crc;
xsendline(ZBIN32);
zsendline(type);
crc = 0xFFFFFFFFL;
crc = UPDC32(type, crc);
for (n=4; --n >= 0; ++hdr) {
crc = UPDC32((0377 & *hdr), crc);
zsendline(*hdr);
}
crc = ~crc;
for (n=4; --n >= 0;) {
zsendline((int)crc);
crc >>= 8;
}
} else {
static int wcrx(void)
{
int sectnum, sectcurr;
char sendchar;
int cblklen; /* bytes to dump this block */
Firstsec = TRUE;
sectnum = 0;
Eofseen = FALSE;
sendchar = Crcflg ? WANTCRC : NAK;
for (;;) {
xsendline(sendchar); /* send it now, we're ready! */
Lleft = 0; /* Do read next time ... */
sectcurr = wcgetsec(secbuf, (sectnum & 0177) ? 50 : 130);
report(sectcurr);
if (sectcurr == ((sectnum + 1) & 0377)) {
sectnum++;
cblklen = Bytesleft > Blklen ? Blklen : Bytesleft;
if (putsec(secbuf, cblklen) == ERROR)
return ERROR;
if ((Bytesleft -= cblklen) < 0)
Bytesleft = 0;
sendchar = ACK;
} else if (sectcurr == (sectnum & 0377)) {
zperr("Received dup Sector");
sendchar = ACK;
} else if (sectcurr == WCEOT) {
if (closeit())
return ERROR;
xsendline(ACK);
Lleft = 0; /* Do read next time ... */
return OK;
} else if (sectcurr == ERROR)
return ERROR;
else {
zperr("Sync Error");
return ERROR;
}
}
}
/*
* Send binary array buf of length length, with ending ZDLE sequence frameend
*/
void zsdata(const char *buf, size_t length, int frameend)
{
register unsigned short crc;
crc = 0;
do {
zsendline(*buf);
crc = updcrc((0377 & *buf), crc);
buf++;
} while (--length > 0);
xsendline(ZDLE);
xsendline(frameend);
crc = updcrc(frameend, crc);
crc = updcrc(0, updcrc(0, crc));
zsendline(crc >> 8);
zsendline(crc);
if (frameend == ZCRCW) {
xsendline(XON);
flushmo();
}
}
/*
* Fetch a pathname from the other end as a C ctyle ASCIZ string.
* Length is indeterminate as long as less than Blklen
* A null string represents no more files (YMODEM)
*/
static int wcrxpn(char *rpn)
{
int c;
readline(1);
et_tu:
Firstsec = TRUE;
Eofseen = FALSE;
xsendline(Crcflg ? WANTCRC : NAK);
Lleft = 0; /* Do read next time ... */
while ((c = wcgetsec(rpn, 100)) != 0) {
if (c == WCEOT) {
zperr("Pathname fetch returned %d", c);
xsendline(ACK);
Lleft = 0; /* Do read next time ... */
readline(1);
goto et_tu;
}
return ERROR;
}
xsendline(ACK);
return OK;
}
/* Send ZMODEM binary header hdr of type type */
static void zsbh32(char *hdr, int type)
{
register int n;
register unsigned long crc;
xsendline(ZBIN32);
zsendline(type);
crc = 0xFFFFFFFFL;
crc = UPDC32(type, crc);
for (n = 4; --n >= 0; ++hdr) {
crc = UPDC32((0377 & *hdr), crc);
zsendline(*hdr);
}
crc = ~crc;
for (n = 4; --n >= 0;) {
zsendline((int) crc);
crc >>= 8;
}
}
static inline void zsendline_s(const char *s, size_t count)
{
const char *end = s + count;
while (s != end) {
int last_esc = 0;
const char *t = s;
while (t != end) {
last_esc = zsendline_tab[(unsigned) ((*t) & 0377)];
if (last_esc)
break;
t++;
}
if (t != s) {
raw_write(0, s, (t - s));
lastsent = t[-1];
s = t;
}
if (last_esc) {
int c = *s;
switch (last_esc) {
case 0:
xsendline(lastsent = c);
break;
case 1:
xsendline(ZDLE);
c ^= 0100;
xsendline(lastsent = c);
break;
case 2:
if ((lastsent & 0177) != '@') {
xsendline(lastsent = c);
} else {
xsendline(ZDLE);
c ^= 0100;
xsendline(lastsent = c);
}
break;
}
s++;
}
}
}
/*
* Send character c with ZMODEM escape sequence encoding.
* Escape XON, XOFF. Escape CR following @ (Telenet net escape)
*/
inline void zsendline(int c)
{
switch (zsendline_tab[(unsigned) (c &= 0377)]) {
case 0:
xsendline(lastsent = c);
break;
case 1:
xsendline(ZDLE);
c ^= 0100;
xsendline(lastsent = c);
break;
case 2:
if ((lastsent & 0177) != '@') {
xsendline(lastsent = c);
} else {
xsendline(ZDLE);
c ^= 0100;
xsendline(lastsent = c);
}
break;
}
}
/*
* Receive a file with ZMODEM protocol
* Assumes file name frame is in secbuf
*/
static int rzfile(void)
{
int c, n;
long last_rxbytes = 0;
long not_printed = 0;
last_bps = 0;
Eofseen = FALSE;
n = 20;
rxbytes = 0l;
if (procheader(secbuf) == ERROR) {
return (tryzhdrtype = ZSKIP);
}
for (;;) {
stohdr(rxbytes);
zshhdr(ZRPOS, Txhdr);
nxthdr:
switch (c = zgethdr(Rxhdr, 0)) {
default:
vfile("lrzfile: zgethdr returned %d", c);
return ERROR;
case ZNAK:
case TIMEOUT:
if (--n < 0) {
vfile("lrzfile: zgethdr returned %d", c);
return ERROR;
}
case ZFILE:
zrdata(secbuf, MAX_BLOCK);
continue;
case ZEOF:
if (rclhdr(Rxhdr) != rxbytes) {
/*
* Ignore eof if it's at wrong place - force
* a timeout because the eof might have gone
* out before we sent our zrpos.
*/
errors = 0;
goto nxthdr;
}
if (Verbose > 1) {
int minleft = 0;
int secleft = 0;
last_bps = (rxbytes / timing(0));
if (last_bps > 0) {
minleft =
(Bytesleft -
rxbytes) / last_bps / 60;
secleft =
((Bytesleft - rxbytes) /
last_bps) % 60;
}
fprintf(stderr,
"\rBytes Received: %7ld/%7ld BPS:%-6d \r\n",
rxbytes, Bytesleft, last_bps);
}
closeok = 1;
if (closeit()) {
tryzhdrtype = ZFERR;
vfile("lrzfile: closeit returned <> 0");
return ERROR;
}
vfile("lrzfile: normal EOF");
return c;
case ERROR: /* Too much garbage in header search error */
if (--n < 0) {
vfile("lrzfile: zgethdr returned %d", c);
return ERROR;
}
zmputs(Attn);
continue;
case ZSKIP:
closeit();
vfile("lrzfile: Sender SKIPPED file");
return c;
case ZDATA:
if (rclhdr(Rxhdr) != rxbytes) {
if (--n < 0) {
return ERROR;
}
zmputs(Attn);
continue;
}
moredata:
if (Verbose > 1
&& (not_printed > 7
|| rxbytes >
last_bps / 2 + last_rxbytes)) {
int minleft = 0;
int secleft = 0;
last_bps = (rxbytes / timing(0));
if (last_bps > 0) {
minleft =
(Bytesleft -
rxbytes) / last_bps / 60;
secleft =
((Bytesleft - rxbytes) /
last_bps) % 60;
}
fprintf(stderr,
"\rBytes Received: %7ld/%7ld BPS:%-6d ETA %02d:%02d ",
rxbytes, Bytesleft, last_bps,
minleft, secleft);
last_rxbytes = rxbytes;
not_printed = 0;
if (nodeinf != -1 && ((time(0) - lup) > 5)) {
lseek(nodeinf, 0, SEEK_SET);
nin.ddn_bpsrate = last_bps;
sprintf(nin.ddn_activity,
"UL: %-34.34s", myname);
write(nodeinf, &nin,
sizeof(struct
DayDream_NodeInfo));
lup = time(0);
}
} else if (Verbose)
not_printed++;
switch (c = zrdata(secbuf, MAX_BLOCK)) {
case ZCAN:
vfile("lrzfile: zgethdr returned %d", c);
return ERROR;
case ERROR: /* CRC error */
if (--n < 0) {
vfile
("lrzfile: zgethdr returned %d",
c);
return ERROR;
}
zmputs(Attn);
continue;
case TIMEOUT:
if (--n < 0) {
vfile
("lrzfile: zgethdr returned %d",
c);
return ERROR;
}
continue;
case GOTCRCW:
n = 20;
putsec(secbuf, Rxcount);
rxbytes += Rxcount;
stohdr(rxbytes);
zshhdr(ZACK, Txhdr);
xsendline(XON);
goto nxthdr;
case GOTCRCQ:
n = 20;
putsec(secbuf, Rxcount);
rxbytes += Rxcount;
stohdr(rxbytes);
zshhdr(ZACK, Txhdr);
goto moredata;
case GOTCRCG:
n = 20;
putsec(secbuf, Rxcount);
rxbytes += Rxcount;
goto moredata;
case GOTCRCE:
n = 20;
putsec(secbuf, Rxcount);
rxbytes += Rxcount;
goto nxthdr;
}
}
}
}
static int wcgetsec(char *rxbuf, int maxtime)
{
int checksum, wcj, firstch;
unsigned short oldcrc;
char *p;
int sectcurr;
for (Lastrx = errors = 0; errors < RETRYMAX; errors++) {
if ((firstch = readline(maxtime)) == STX) {
Blklen = 1024;
goto get2;
}
if (firstch == SOH) {
Blklen = 128;
get2:
sectcurr = readline(1);
if ((sectcurr + (oldcrc = readline(1))) == 0377) {
oldcrc = checksum = 0;
for (p = rxbuf, wcj = Blklen; --wcj >= 0;) {
if ((firstch = readline(1)) < 0)
goto bilge;
oldcrc = updcrc(firstch, oldcrc);
checksum += (*p++ = firstch);
}
if ((firstch = readline(1)) < 0)
goto bilge;
if (Crcflg) {
oldcrc = updcrc(firstch, oldcrc);
if ((firstch = readline(1)) < 0)
goto bilge;
oldcrc = updcrc(firstch, oldcrc);
if (oldcrc & 0xFFFF)
zperr("CRC");
else {
Firstsec = FALSE;
return sectcurr;
}
}
else
if (((checksum - firstch) & 0377) ==
0) {
Firstsec = FALSE;
return sectcurr;
} else
zperr("Checksum");
} else
zperr("Sector number garbled");
}
/* make sure eot really is eot and not just mixmash */
else if (firstch == EOT && readline(1) == TIMEOUT)
return WCEOT;
else if (firstch == CAN) {
if (Lastrx == CAN) {
zperr("Sender CANcelled");
return ERROR;
} else {
Lastrx = CAN;
continue;
}
} else if (firstch == TIMEOUT) {
if (Firstsec)
goto humbug;
bilge:
zperr("TIMEOUT");
} else
zperr("Got 0%o sector header", firstch);
humbug:
Lastrx = 0;
while (readline(1) != TIMEOUT);
if (Firstsec) {
xsendline(Crcflg ? WANTCRC : NAK);
Lleft = 0; /* Do read next time ... */
} else {
maxtime = 40;
xsendline(NAK);
Lleft = 0; /* Do read next time ... */
}
}
/* try to stop the bubble machine. */
canit();
return ERROR;
}
