/*
* Ack a ZFIN packet, let byegones be byegones
*/
int ackbibi(void)
{
int n;
int c;
Syslog('z', "ackbibi:");
stohdr(0L);
for (n=3; --n>=0; ) {
zshhdr(ZFIN, Txhdr);
switch ((c = GETCHAR(10))) {
case 'O': GETCHAR(1); /* Discard 2nd 'O' */
Syslog('z', "Zmodem: ackbibi complete");
return ZCOMPL;
case TERROR:
case HANGUP: Syslog('z', "Zmodem: ackbibi got %d, ignore",c);
return 0;
case TIMEOUT:
default: Syslog('z', "Zmodem: ackbibi got '%s', continue", printablec(c));
break;
}
}
return ZCOMPL;
}
/*
* Ack a ZFIN packet, let byegones be byegones
*/
static void ackbibi(void)
{
int n;
vfile("ackbibi:");
Readnum = 1;
stohdr(0L);
for (n = 3; --n >= 0;) {
purgeline();
zshhdr(ZFIN, Txhdr);
switch (readline(100)) {
case 'O':
readline(1); /* Discard 2nd 'O' */
vfile("ackbibi complete");
return;
case RCDO:
return;
case TIMEOUT:
default:
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;
}
}
}
}
/*
* Initialize for Zmodem receive attempt, try to activate Zmodem sender
* Handles ZSINIT frame
* Return ZFILE if Zmodem filename received, -1 on error,
* ZCOMPL if transaction finished, else 0
*/
static int tryz(void)
{
int c, n;
int cmdzack1flg;
for (n = Zmodem ? 15 : 5; --n >= 0;) {
/* Set buffer length (0) and capability flags */
stohdr(0L);
Txhdr[ZF0] = CANFC32 | CANFDX | CANOVIO | CANBRK;
if (Zctlesc)
Txhdr[ZF0] |= TESCCTL; /* TESCCTL == ESCCTL */
zshhdr(tryzhdrtype, Txhdr);
if (tryzhdrtype == ZSKIP) /* Don't skip too far */
tryzhdrtype = ZRINIT; /* CAF 8-21-87 */
again:
switch (zgethdr(Rxhdr, 0)) {
case ZRQINIT:
continue;
case ZEOF:
continue;
case TIMEOUT:
continue;
case ZFILE:
zconv = Rxhdr[ZF0];
zmanag = Rxhdr[ZF1];
ztrans = Rxhdr[ZF2];
tryzhdrtype = ZRINIT;
c = zrdata(secbuf, MAX_BLOCK);
mode(3);
if (c == GOTCRCW)
return ZFILE;
zshhdr(ZNAK, Txhdr);
goto again;
case ZSINIT:
Zctlesc = TESCCTL & Rxhdr[ZF0];
if (zrdata(Attn, ZATTNLEN) == GOTCRCW) {
stohdr(1L);
zshhdr(ZACK, Txhdr);
goto again;
}
zshhdr(ZNAK, Txhdr);
goto again;
case ZFREECNT:
stohdr(getfree());
zshhdr(ZACK, Txhdr);
goto again;
case ZCOMMAND:
cmdzack1flg = Rxhdr[ZF0];
if (zrdata(secbuf, MAX_BLOCK) == GOTCRCW) {
if (Verbose) {
fprintf(stderr,
"lrz: remote requested command\n");
fprintf(stderr, "lrz: %s\n",
secbuf);
}
if (Verbose)
fprintf(stderr,
"lrz: not executed\n");
zshhdr(ZCOMPL, Txhdr);
return ZCOMPL;
}
goto again;
case ZCOMPL:
goto again;
default:
continue;
case ZFIN:
ackbibi();
return ZCOMPL;
case ZCAN:
return ERROR;
}
}
return 0;
}
static int wcs(const char *oname, const char *remotename)
{
#if !defined(S_ISDIR)
int c;
#endif
struct stat f;
char *name;
struct zm_fileinfo zi;
#ifdef HAVE_MMAP
int dont_mmap_this = 0;
#endif
if (Restricted) {
/* restrict pathnames to current tree or uucppublic */
if (strstr(oname, "../")
#ifdef PUBDIR
|| (oname[0] == '/' && strncmp(oname, MK_STRING(PUBDIR), strlen(MK_STRING(PUBDIR))))
#endif
) {
canit(0);
zmodem_error(1, 0, "security violation: not allowed to upload from %s", oname);
}
}
if (0 == strcmp(oname, "-")) {
char *p = getenv("ONAME");
name = (char *)malloc(PATH_MAX + 1);
if (p) {
strcpy(name, p);
} else {
sprintf(name, "s%lu.lsz", (unsigned long) getpid());
}
input_f = stdin;
#ifdef HAVE_MMAP
dont_mmap_this = 1;
#endif
} else if ((input_f = fopen(oname, "r")) == NULL) {
++errcnt;
return OK; /* pass over it, there may be others */
} else {
name = (char *)malloc(PATH_MAX + 1);
strcpy(name, oname);
}
#ifdef HAVE_MMAP
if (!use_mmap || dont_mmap_this)
#endif
{
static char *s = NULL;
static size_t last_length = 0;
struct stat st;
if (fstat(fileno(input_f), &st) == -1)
st.st_size = 1024 * 1024;
if (buffersize == (size_t) - 1 && s) {
if ((size_t) st.st_size > last_length) {
free(s);
s = NULL;
last_length = 0;
}
}
if (!s && buffersize) {
last_length = 16384;
if (buffersize == (size_t) - 1) {
if (st.st_size > 0)
last_length = st.st_size;
} else
last_length = buffersize;
/* buffer whole pages */
last_length = (last_length + 4095) & 0xfffff000;
s = malloc(last_length);
if (!s) {
exit(1);
}
}
if (s) {
#ifdef SETVBUF_REVERSED
setvbuf(input_f, _IOFBF, s, last_length);
#else
setvbuf(input_f, s, _IOFBF, last_length);
#endif
}
}
vpos = 0;
/* Check for directory or block special files */
fstat(fileno(input_f), &f);
#if defined(S_ISDIR)
if (S_ISDIR(f.st_mode) || S_ISBLK(f.st_mode)) {
#else
c = f.st_mode & S_IFMT;
if (c == S_IFDIR || c == S_IFBLK) {
#endif
fclose(input_f);
free(name);
return OK;
}
if (remotename) {
/* disqualify const */
union {
const char *c;
char *s;
} cheat;
cheat.c = remotename;
zi.fname = cheat.s;
} else
zi.fname = name;
zi.modtime = f.st_mtime;
zi.mode = f.st_mode;
#if defined(S_ISFIFO)
zi.bytes_total = (S_ISFIFO(f.st_mode)) ? DEFBYTL : f.st_size;
#else
zi.bytes_total = c == S_IFIFO ? DEFBYTL : f.st_size;
#endif
zi.bytes_sent = 0;
zi.bytes_received = 0;
zi.bytes_skipped = 0;
zi.eof_seen = 0;
++Filcnt;
free(name);
switch (wctxpn(&zi)) {
case ERROR:
return ERROR;
case ZSKIP:
return OK;
}
if (!zmodem_requested && wctx(&zi) == ERROR) {
return ERROR;
}
if (Unlinkafter)
unlink(oname);
return 0;
}
/*
* generate and transmit pathname block consisting of
* pathname (null terminated),
* file length, mode time and file mode in octal
* as provided by the Unix fstat call.
* N.B.: modifies the passed name, may extend it!
*/
static int wctxpn(struct zm_fileinfo *zi)
{
register char *p, *q;
char *name2;
struct stat f;
name2 = (char *)malloc(PATH_MAX + 1);
if (protocol == ZM_XMODEM) {
free(name2);
return OK;
}
if (!zmodem_requested)
if (getnak()) {
free(name2);
return ERROR;
}
q = (char *) 0;
#if 0
if (Dottoslash) { /* change . to . */
for (p = zi->fname; *p; ++p) {
if (*p == '/')
q = p;
else if (*p == '.')
*(q = p) = '/';
}
if (q && strlen(++q) > 8) { /* If name>8 chars */
q += 8; /* make it .ext */
strcpy(name2, q); /* save excess of name */
*q = '.';
strcpy(++q, name2); /* add it back */
}
}
#endif
for (p = zi->fname, q = txbuf; *p;)
if ((*q++ = *p++) == '/' && !Fullname)
q = txbuf;
*q++ = 0;
p = q;
while (q < (txbuf + MAX_BLOCK))
*q++ = 0;
/* note that we may lose some information here in case mode_t is wider than an
* int. But i believe sending %lo instead of %o _could_ break compatability
*/
if (!Ascii && (input_f != stdin) && *zi->fname && fstat(fileno(input_f), &f) != -1)
sprintf(p, "%lu %lo %o 0 %d %ld", (long) f.st_size, f.st_mtime, (unsigned int) ((no_unixmode) ? 0 : f.st_mode), Filesleft, Totalleft);
Totalleft -= f.st_size;
if (--Filesleft <= 0)
Totalleft = 0;
if (Totalleft < 0)
Totalleft = 0;
/* force 1k blocks if name won't fit in 128 byte block */
if (txbuf[125])
blklen = 1024;
else { /* A little goodie for IMP/KMD */
txbuf[127] = (f.st_size + 127) >> 7;
txbuf[126] = (f.st_size + 127) >> 15;
}
if (zmodem_requested)
free(name2);
return zsendfile(zi, txbuf, 1 + strlen(p) + (p - txbuf));
/*
if (wcputsec(txbuf, 0, 128) == ERROR) {
free(name2);
return ERROR;
}
free(name2);
return OK;
*/
}
static int getnak(void)
{
int firstch;
int tries = 0;
Lastrx = 0;
for (;;) {
tries++;
switch (firstch = READLINE_PF(100)) {
case ZPAD:
if (getzrxinit())
return ERROR;
Ascii = 0; /* Receiver does the conversion */
return FALSE;
case TIMEOUT:
/* 30 seconds are enough */
if (tries == 3) {
return TRUE;
}
/* don't send a second ZRQINIT _directly_ after the
* first one. Never send more then 4 ZRQINIT, because
* omen rz stops if it saw 5 of them */
if ((zrqinits_sent > 1 || tries > 1) && zrqinits_sent < 4) {
/* if we already sent a ZRQINIT we are using zmodem
* protocol and may send further ZRQINITs
*/
stohdr(0L);
zshhdr(ZRQINIT, Txhdr);
zrqinits_sent++;
}
continue;
case WANTG:
io_mode(io_mode_fd, 2); /* Set cbreak, XON/XOFF, etc. */
Optiong = TRUE;
blklen = 1024;
case WANTCRC:
Crcflg = TRUE;
case NAK:
return FALSE;
case CAN:
if ((firstch = READLINE_PF(20)) == CAN && Lastrx == CAN)
return TRUE;
default:
break;
}
Lastrx = firstch;
}
}
int bbs_zsendfile(char *filename, char *remote)
{
struct stat f;
if (stat(filename, &f) != 0)
return ERROR;
Totalleft = f.st_size;
Filesleft = 1;
calc_blklen(Totalleft);
protocol = ZM_ZMODEM;
io_mode_fd = 1;
blklen = start_blklen = 1024;
if (setjmp(zmodemjmp) == 0) {
zsendline_init();
io_mode(io_mode_fd, 1);
readline_setup(io_mode_fd, 128, 256);
raw_write(0, "rz\r", 3);
/* TODO : throw away received input */
purgeline(io_mode_fd);
stohdr(0L);
zshhdr(ZRQINIT, Txhdr);
zrqinits_sent++;
oflush();
Crcflg = FALSE;
firstsec = TRUE;
bytcnt = (size_t) - 1;
Totsecs = 0;
if (wcs(filename, remote) == ERROR) {
readline_clean();
return ERROR;
}
if (zmodem_requested)
saybibi();
else if (protocol != ZM_XMODEM) {
struct zm_fileinfo zi;
char *pa;
pa = (char *)malloc(PATH_MAX + 1);
*pa = '\0';
zi.fname = pa;
zi.modtime = 0;
zi.mode = 0;
zi.bytes_total = 0;
zi.bytes_sent = 0;
zi.bytes_received = 0;
zi.bytes_skipped = 0;
wctxpn(&zi);
free(pa);
}
oflush();
/* here needs a oflush */
/* eat avalible input */
/* better to eat some input here */
io_mode(io_mode_fd, 0);
readline_clean();
} else {
oflush();
signal(SIGALRM, SIG_IGN);
alarm(0);
return ERROR;
}
return OK;
}
/*
* Receive a file with ZMODEM protocol
* Assumes file name frame is in secbuf
*/
int rzfile(void)
{
int c, n;
Eofseen=FALSE;
rxbytes = 0l;
if ((c = procheader(secbuf))) {
return (tryzhdrtype = c);
}
n = 20;
for (;;) {
stohdr(rxbytes);
zshhdr(ZRPOS, Txhdr);
nxthdr:
switch (c = zgethdr(Rxhdr)) {
default: Syslog('z', "rzfile: Wrong header %d", c);
if ( --n < 0) {
Syslog('+', "Zmodem: wrong header %d", c);
return TERROR;
}
continue;
case ZCAN: Syslog('+', "Zmodem: sender CANcelled");
return TERROR;
case ZNAK: if ( --n < 0) {
Syslog('+', "Zmodem: Got ZNAK");
return TERROR;
}
continue;
case TIMEOUT: if ( --n < 0) {
Syslog('z', "Zmodem: TIMEOUT");
return TERROR;
}
continue;
case ZFILE: zrdata(secbuf, MAXBLOCK);
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 (closeit(1)) {
tryzhdrtype = ZFERR;
Syslog('+', "Zmodem: error closing file");
return TERROR;
}
fout = NULL;
Syslog('z', "rzfile: normal EOF");
return c;
case HANGUP: Syslog('+', "Zmodem: Lost Carrier");
return TERROR;
case TERROR: /* Too much garbage in header search error */
if (--n < 0) {
Syslog('+', "Zmodem: Too many errors");
return TERROR;
}
zmputs(Attn);
continue;
case ZSKIP: Modtime = 1;
closeit(1);
Syslog('+', "Zmodem: Sender SKIPPED file");
return c;
case ZDATA: if (rclhdr(Rxhdr) != rxbytes) {
if ( --n < 0) {
Syslog('+', "Zmodem: Data has bad address");
return TERROR;
}
zmputs(Attn);
continue;
}
moredata:
Nopper();
alarm_on();
switch (c = zrdata(secbuf, MAXBLOCK)) {
case ZCAN: Syslog('+', "Zmodem: sender CANcelled");
return TERROR;
case HANGUP: Syslog('+', "Zmodem: Lost Carrier");
return TERROR;
case TERROR: /* CRC error */
if (--n < 0) {
Syslog('+', "Zmodem: Too many errors");
return TERROR;
}
zmputs(Attn);
continue;
case TIMEOUT: if ( --n < 0) {
Syslog('+', "Zmodem: TIMEOUT");
return TERROR;
}
continue;
case GOTCRCW: n = 20;
putsec(secbuf, Rxcount);
rxbytes += Rxcount;
stohdr(rxbytes);
PUTCHAR(XON);
zshhdr(ZACK, Txhdr);
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;
}
}
}
}
/*
* Initialize for Zmodem receive attempt, try to activate Zmodem sender
* Handles ZSINIT frame
* Return ZFILE if Zmodem filename received, -1 on error,
* ZCOMPL if transaction finished, else 0: can be ymodem.
*/
int tryz(void)
{
int c, n;
int cmdzack1flg;
if (protocol != ZM_ZMODEM)
return 0;
for (n = zmodem_requested ?15:10; --n >= 0; ) {
/*
* Set buffer length (0) and capability flags
*/
Syslog('z', "tryz attempt %d", n);
stohdr(0L);
Txhdr[ZF0] = CANFC32|CANFDX|CANOVIO;
if (Zctlesc)
Txhdr[ZF0] |= TESCCTL;
zshhdr(tryzhdrtype, Txhdr);
if (tryzhdrtype == ZSKIP) /* Don't skip too far */
tryzhdrtype = ZRINIT; /* CAF 8-21-87 */
again:
switch (zgethdr(Rxhdr)) {
case ZRQINIT: continue;
case ZEOF: continue;
case TIMEOUT: Syslog('z', "Zmodem: tryz() timeout attempt %d", n);
continue;
case ZFILE: zconv = Rxhdr[ZF0];
if (!zconv) {
Syslog('z', "*** !zconv %d", zconv);
zconv = ZCBIN;
}
zmanag = Rxhdr[ZF1];
ztrans = Rxhdr[ZF2];
tryzhdrtype = ZRINIT;
c = zrdata(secbuf, MAXBLOCK);
io_mode(0, 3);
if (c == GOTCRCW) {
Syslog('z', "tryz return ZFILE");
return ZFILE;
}
zshhdr(ZNAK, Txhdr);
goto again;
case ZSINIT: /* this once was:
* Zctlesc = TESCCTL & Rxhdr[ZF0];
* trouble: if rz get --escape flag:
* - it sends TESCCTL to sz,
* get a ZSINIT _without_ TESCCTL (yeah - sender didn't know),
* overwrites Zctlesc flag ...
* - sender receives TESCCTL and uses "|=..."
* so: sz escapes, but rz doesn't unescape ... not good.
*/
Zctlesc |= TESCCTL & Rxhdr[ZF0];
if (zrdata(Attn, ZATTNLEN) == GOTCRCW) {
stohdr(1L);
zshhdr(ZACK, Txhdr);
goto again;
}
zshhdr(ZNAK, Txhdr);
goto again;
case ZFREECNT: stohdr(getfree());
zshhdr(ZACK, Txhdr);
goto again;
case ZCOMMAND: cmdzack1flg = Rxhdr[ZF0];
if (zrdata(secbuf, MAXBLOCK) == GOTCRCW) {
if (cmdzack1flg & ZCACK1)
stohdr(0L);
else
Syslog('+', "Zmodem: request for command \"%s\" ignored", printable(secbuf,-32));
stohdr(0L);
do {
zshhdr(ZCOMPL, Txhdr);
} while (++errors<20 && zgethdr(Rxhdr) != ZFIN);
return ackbibi();
}
zshhdr(ZNAK, Txhdr);
goto again;
case ZCOMPL: goto again;
case ZRINIT: Syslog('z', "tryz: got ZRINIT");
return TERROR;
case ZFIN: /* do not beleive in first ZFIN */
ackbibi();
return ZCOMPL;
case TERROR:
case HANGUP:
case ZCAN: return TERROR;
default: continue;
}
}
return 0;
}
/* ------------------------------------------------------------------------- */
int tx_zmodem(s_protinfo *pi, bool caller)
{
int startblk = 64; /* Initial Zmodem block size */
int minblk = 64; /* Minimal Z-protocol block size */
int maxblk = 1024;/* Maximal Z-protocol block size */
int blocklen = 0; /* Length of transmitted blocks */
int goodblk = 0; /* How many blocks we sent w/o ZRPOS'tion :) */
int txwindow = 0; /* Tranmitter window size (0 means streaming) */
int newcnt = 0; /* Count free bytes in receiver's buffer */
int rxbuflen = 0; /* Receiver's max buffer length */
int rxlastpos = 0; /* Receiver's last reported offset */
int beenhere = 0; /* How many times we've been ZRPOS'd same place */
long bytescnt = 0; /* Received bytes(current offset) */
long lastsync = 0; /* Last offset to which we got a ZRPOS */
char zconv = 0; /* Local ZMODEM file conversion request */
char zmanag = 0; /* Local ZMODEM file management request */
char ztrans = 0; /* Local ZMODEM file translation request */
char zexten = 0; /* Local ZMODEM file extended options */
char *txbuf = NULL;/* Buffer with ZMAXBLOCKLEN size */
int zrinitcnt = 0; /* Count received ZRINITs */
int rxflags1 = 0;
int rxflags2 = 0;
int txtries = 0;
int junkcnt = 0;
int initacked = 0; /* TRUE when at least one ZRQINIT was sent */
/* after first ZRINIT was received */
int rc = 0; /* Our return code */
int dtype, n;
int ftype;
char c, *p;
long unsigned crc32;
enum ztxstates txstate;
time_t deadtimer;
log("start %s send", Protocols[state.handshake->protocol]);
DEB((D_PROT, "start %s send", Protocols[state.handshake->protocol]));
/* Set time transfer started at */
if( pi->start_time == 0 )
pi->start_time = time(NULL);
txbuf = (char *)xmalloc(ZMAXBLOCKLEN+1);
zconv = ZCBIN;
maxblk = (state.handshake->protocol == PROT_ZMODEM) ? 1024 : 8192;
/* Set initial block size (default is 128b) */
if( (startblk = conf_number(cf_zmodem_start_block_size)) > 0 )
{
if( startblk%64 || startblk > maxblk || startblk < 64 )
startblk = 256;
} else
startblk = 256;
blocklen = startblk;
txwindow = conf_number(cf_zmodem_tx_window);
Z_Rxwait = ZWAITTIME;
Z_Rxtout = ZRXTIMEOUT;
txstate = ZTX_START;
timer_set(&deadtimer, ZDEADTIMER);
setalarm(Z_Rxtout);
/*
* At zmodem batches send empty netmail packet
* if no real outgoing traffic available
*/
if( !pi->send_left_size && conf_boolean(cf_zmodem_send_dummy_pkt) )
zmodem_add_empty_packet(pi);
while(1)
{
if( timer_expired(deadtimer) )
{
log("brain dead! (abort)");
gotoexit(PRC_LOCALABORTED);
}
if( txstate == ZTX_RQINIT || txstate == ZTX_FINFO
|| txstate == ZTX_EOF || txstate == ZTX_FIN )
{
#ifdef DEBUG
if( txtries ) DEB((D_PROT, "tx_zmodem: try #%d", txtries));
#endif
if( ++txtries > ZMAXTRIES )
{
log("out of tries");
gotoexit(PRC_LOCALABORTED);
}
}
switch(txstate) {
case ZTX_START:
DEB((D_PROT, "tx_zmodem: entering state ZTX_START"));
if( PUTSTR("rz\r") < 0 )
gotoexit(PRC_ERROR);
txtries = 0;
txstate = ZTX_RQINIT;
break;
case ZTX_RQINIT:
DEB((D_PROT, "tx_zmodem: entering state ZTX_RQINIT"));
stohdr(Z_Txhdr, 0L);
if( zshhdr(ZRQINIT, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
setalarm(Z_Rxtout);
txstate = ZTX_RQINITACK;
break;
case ZTX_NEXTFILE:
DEB((D_PROT, "tx_zmodem: entering state ZTX_NEXTFILE"));
if (pi->send) p_tx_fclose(pi);
txtries = 0;
txstate = p_tx_fopen(pi, NULL) ? ZTX_FIN : ZTX_FINFO;
log("nextfile next state: %d", txstate);
break;
case ZTX_FINFO:
DEB((D_PROT, "tx_zmodem: entering state ZTX_FINFO"));
zrinitcnt = 0;
strnxcpy(txbuf, pi->send->net_name, ZMAXFNAME);
p = txbuf + strlen(txbuf) + 1;
sprintf(p, "%ld %lo %lo 0 %ld %ld",
(long)pi->send->bytes_total, (long)pi->send->mod_time,
(long)pi->send->mode, (long)pi->send_left_num,
(long)pi->send_left_size);
DEB((D_PROT, "tx_zmodem: send \"%s\\000%s\"", txbuf, p));
Z_Txhdr[ZF0] = zconv; /* file conversion request */
Z_Txhdr[ZF1] = zmanag; /* file management request */
Z_Txhdr[ZF2] = ztrans; /* file transport request */
Z_Txhdr[ZF3] = zexten;
if( zsbhdr(ZFILE, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
if( zsdata(txbuf, (p - txbuf) + strlen(p), ZCRCW, 0) < 0 )
gotoexit(PRC_ERROR);
setalarm(Z_Rxtout);
txstate = ZTX_FINFOACK;
break;
case ZTX_STARTDATA:
DEB((D_PROT, "tx_zmodem: entering state ZTX_STARTDATA"));
newcnt = rxbuflen;
junkcnt = 0;
stohdr(Z_Txhdr, pi->send->bytes_sent);
if( zsbhdr(ZDATA, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
txstate = ZTX_DATA;
break;
case ZTX_DATA:
DEB((D_PROT, "tx_zmodem: entering state ZTX_DATA"));
timer_set(&deadtimer, ZDEADTIMER);
setalarm(Z_Rxtout); /* Remove annoing timeouts! */
if( (n = p_tx_readfile(txbuf, blocklen, pi)) < 0 )
{
/* error occured, remote wait for DATA */
/* so send null ZCRCE data subpacket */
if( zsdata(txbuf, 0, ZCRCE, 0) < 0 )
gotoexit(PRC_ERROR);
txstate = ZTX_NEXTFILE;
break;
}
if( pi->send->eofseen )
dtype = ZCRCE;
else if( junkcnt > 6 )
dtype = ZCRCW;
else if( bytescnt == lastsync )
dtype = ZCRCW;
else if( rxbuflen && (newcnt -= n) <= 0 )
dtype = ZCRCW;
else if( txwindow && (bytescnt - rxlastpos + n) >= txwindow )
dtype = ZCRCQ;
else
dtype = ZCRCG;
if( (rc = p_info(pi, 0)) )
gotoexit(rc);
if( zsdata(txbuf, n, dtype, pi->send->bytes_sent) < 0 )
gotoexit(PRC_ERROR);
if( ++goodblk > 5 && blocklen*2 <= maxblk )
{
goodblk = 0;
blocklen *= 2;
DEB((D_PROT, "tx_zmodem: new blocklen = %ld byte(s)", blocklen));
}
bytescnt = pi->send->bytes_sent += n;
if( dtype == ZCRCW )
{
junkcnt = 0;
setalarm(Z_Rxtout);
txstate = ZTX_CRCWACK;
break;
}
else if( dtype == ZCRCQ )
{
junkcnt = 0;
setalarm(Z_Rxtout);
txstate = ZTX_CRCQACK;
break;
}
else if( dtype == ZCRCE )
{
txtries = 0;
txstate = ZTX_EOF;
break;
}
if( CHARWAIT(0) )
{
while( (rc = GETCHAR(1)) != ZTIMER )
{
if( rc < 0 )
{
gotoexit(PRC_ERROR);
}
else if( rc == CAN || rc == ZPAD )
{
DEB((D_PROT, "tx_zmodem: got ZPAD or CAN!"));
setalarm(Z_Rxtout);
txstate = ZTX_READCHECK;
break;
}
else if( rc == XOFF || rc == (XOFF|0200) )
{
DEB((D_PROT, "tx_zmodem: got XOFF"));
if( GETCHAR(5) < 0 )
gotoexit(PRC_ERROR);
break;
}
else if( rc == XON || rc == (XON|0200) )
{
DEB((D_PROT, "tx_zmodem: got XON"));
}
else
{
junkcnt++;
DEB((D_PROT, "tx_zmodem: got JUNK = 0x%x (junkcnt = %d)",
rc, junkcnt));
}
} /* end of while( rc != ZTIMER ) */
} /* end of if( CHARWAIT(0) ) */
break;
case ZTX_EOF:
DEB((D_PROT, "tx_zmodem: entering state ZTX_EOF"));
stohdr(Z_Txhdr, pi->send->bytes_sent);
if( zsbhdr(ZEOF, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
setalarm(Z_Rxtout);
txstate = ZTX_EOFACK;
break;
case ZTX_FIN:
DEB((D_PROT, "tx_zmodem: entering state ZTX_FIN"));
stohdr(Z_Txhdr, 0L);
if( zshhdr(ZFIN, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
setalarm(Z_Rxtout);
txstate = ZTX_FINACK;
break;
default:
/* Ignore them all */
break;
} /* end of switch(txstate) */
if( txstate != ZTX_START && txstate != ZTX_RQINIT
&& txstate != ZTX_FINFO && txstate != ZTX_DATA
&& txstate != ZTX_EOF && txstate != ZTX_FIN )
{
switch( ftype = zgethdr(Z_Rxhdr) ) {
case ZCAN:
gotoexit(PRC_REMOTEABORTED);
break;
case ZHANGUP:
case ZEXIT:
gotoexit(PRC_ERROR);
break;
case ZTIMER:
log("time out");
if( txstate == ZTX_READCHECK )
zsdata(txbuf, 0, ZCRCE, 0);
switch(txstate) {
case ZTX_RQINITACK: txstate = ZTX_RQINIT; break;
case ZTX_FINFOACK: txstate = ZTX_FINFO; break;
case ZTX_READCHECK: txstate = ZTX_STARTDATA; break;
case ZTX_CRCWACK: txstate = ZTX_STARTDATA; break;
case ZTX_CRCQACK: txstate = ZTX_STARTDATA; break;
case ZTX_EOFACK: txstate = ZTX_EOF; break;
case ZTX_FINACK: txstate = ZTX_FIN; break;
default: break;
}
break;
case ZERROR:
case ZCRCERR:
/* NAK them all! */
stohdr(Z_Txhdr, 0L);
if( zshhdr(ZNAK, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
break;
case ZRQINIT:
if( txstate == ZTX_RQINITACK )
{
if( Z_Rxhdr[0] == ZCOMMAND )
break;
stohdr(Z_Txhdr, 0L);
if( zshhdr(ZNAK, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
txstate = ZTX_RQINIT;
}
else if( txstate == ZTX_FINFOACK )
{
/* remote is sender - abort */
log("zmodem: remote is sender");
gotoexit(PRC_LOCALABORTED);
}
break;
case ZRINIT:
if( txstate == ZTX_RQINITACK )
{
if( initacked == 0 )
{
/* Be sure ack first ZRINIT */
stohdr(Z_Txhdr, 0L);
if( zshhdr(ZRQINIT, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
initacked = 1;
}
/* Get receiver's options */
rxflags1 = (0377 & Z_Rxhdr[ZF0]);
rxflags2 = (0377 & Z_Rxhdr[ZF1]);
Z_Txfcs32 = (rxflags1 & CANFC32);
Z_Ctlesc |= (rxflags1 & TESCCTL);
rxbuflen = (0377 & Z_Rxhdr[ZP0]);
rxbuflen += ((0377 & Z_Rxhdr[ZP1])<<8);
/* No ZCRCQ if remote doesn't indicate */
/* FDX ability */
if( !(rxflags1 & CANFDX) )
txwindow = 0;
DEB((D_PROT, "tx_zmodem: Z_Txfcs32 = %d Z_Ctlesc = %d",
Z_Txfcs32, Z_Ctlesc));
DEB((D_PROT, "tx_zmodem: rxbuflen = %d blocklen = %d",
rxbuflen, blocklen));
DEB((D_PROT, "tx_zmodem: txwindow = %u",
txwindow));
txstate = ZTX_NEXTFILE;
}
else if( txstate == ZTX_FINFOACK )
{
/* Possible they didn't see */
/* our file information */
if( ++zrinitcnt > 2 )
txstate = ZTX_FINFO;
}
else if( txstate == ZTX_READCHECK
|| txstate == ZTX_CRCQACK
|| txstate == ZTX_CRCWACK )
{
if( txstate == ZTX_READCHECK
|| txstate == ZTX_CRCQACK )
zsdata(txbuf, 0, ZCRCE, 0);
/* Assume file normaly sent ? */
log("assume file normaly sent");
pi->send->status = FSTAT_SUCCESS;
txstate = ZTX_NEXTFILE;
}
else if( txstate == ZTX_EOFACK )
{
/* ok, send next */
pi->send->status = FSTAT_SUCCESS;
txstate = ZTX_NEXTFILE;
}
else if( txstate == ZTX_FINACK )
{
/* Possible we should ignore */
/* first ZRINIT. Because they */
/* didn't see our first ZFIN */
/* But I'm soo lazy .. :)) */
txstate = ZTX_FIN;
}
break;
case ZACK:
if( txstate == ZTX_CRCWACK )
{
rxlastpos = Z_Rxpos;
if( pi->send->bytes_sent == Z_Rxpos )
txstate = ZTX_STARTDATA;
}
else if( txstate == ZTX_READCHECK
|| txstate == ZTX_CRCQACK )
{
rxlastpos = Z_Rxpos;
txstate = ZTX_DATA;
}
break;
case ZSKIP:
if( txstate == ZTX_FINFOACK
|| txstate == ZTX_READCHECK
|| txstate == ZTX_CRCQACK
|| txstate == ZTX_CRCWACK
|| txstate == ZTX_EOFACK )
{
if( txstate == ZTX_READCHECK
|| txstate == ZTX_CRCQACK )
zsdata(txbuf, 0, ZCRCE, 0);
if( txstate == ZTX_READCHECK )
CLEAROUT();
pi->send->status = FSTAT_SKIPPED;
log("remote side skipped file");
txstate = ZTX_NEXTFILE;
}
break;
case ZFIN:
/* BUG!BUG!BUG!BUG!BUG!BUG!BUG!BUG!BUG! */
/* BUG!BUG!BUG!BUG!BUG!BUG!BUG!BUG!BUG! */
log(" BUG!BUG!BUG!BUG!BUG!BUG!BUG!BUG!BUG! ");
if( txstate == ZTX_FINACK )
{
if( PUTSTR("OO") == 0 )
FLUSHOUT();
gotoexit(PRC_NOERROR);
}
break;
case ZRPOS:
if( txstate == ZTX_FINFOACK
|| txstate == ZTX_READCHECK
|| txstate == ZTX_CRCQACK
|| txstate == ZTX_CRCWACK
|| txstate == ZTX_EOFACK )
{
rxlastpos = Z_Rxpos;
/* Clear modem buffers */
/* if( txstate != FINFOACK ) SENDBREAK(); */
if( txstate == ZTX_READCHECK ) CLEAROUT();
if( txstate == ZTX_READCHECK
|| txstate == ZTX_CRCQACK )
{
if( zsdata(txbuf, 0, ZCRCE, 0) < 0 )
gotoexit(PRC_ERROR);
}
/* Reset EOF flag! */
pi->send->eofseen = FALSE;
/* Check pos */
if( (Z_Rxpos || txstate != ZTX_FINFOACK)
&& p_tx_rewind(pi, Z_Rxpos) )
{
logerr("can't send file from requested position");
/* Open next file for send */
txstate = ZTX_NEXTFILE;
break;
}
if( txstate == ZTX_FINFOACK )
{
if( Z_Rxpos )
{
log("resyncing at offset %d", Z_Rxpos);
pi->send->bytes_skipped = Z_Rxpos;
}
}
else if( txstate == ZTX_READCHECK
|| txstate == ZTX_CRCWACK
|| txstate == ZTX_CRCQACK )
{
goodblk = 0;
if( lastsync >= Z_Rxpos && ++beenhere > 4 )
if( blocklen > minblk )
{
blocklen /= 2;
DEB((D_PROT, "tx_zmodem: falldown to %ld BlockLen", blocklen));
}
}
lastsync = bytescnt = pi->send->bytes_sent = Z_Rxpos;
if( txstate == ZTX_FINFOACK )
--lastsync;
txstate = ZTX_STARTDATA;
}
break;
case ZNAK:
switch(txstate) {
case ZTX_RQINITACK: txstate = ZTX_RQINIT; break;
case ZTX_FINFOACK: txstate = ZTX_FINFO; break;
case ZTX_EOFACK: txstate = ZTX_EOF; break;
case ZTX_FINACK: txstate = ZTX_FIN; break;
default: break;
}
break;
case ZCRC:
if( txstate == ZTX_FINFOACK )
{
log(" Send file's CRC-32 ");
crc32 = 0xFFFFFFFFL;
while( ((c = getc(pi->send->fp)) != EOF) && --Z_Rxpos )
crc32 = updcrc32(c, crc32);
crc32 = ~crc32;
clearerr(pi->send->fp); /* Clear EOF */
fseek(pi->send->fp, 0L, 0);
stohdr(Z_Txhdr, crc32);
if( zsbhdr(ZCRC, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
}
break;
case ZCHALLENGE:
if( txstate == ZTX_RQINITACK )
{
/* Echo receiver's challenge number */
stohdr(Z_Txhdr, Z_Rxpos);
if( zshhdr(ZACK, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
txstate = ZTX_RQINIT;
}
break;
case ZCOMMAND:
if( txstate == ZTX_RQINITACK )
{
txstate = ZTX_RQINIT;
}
break;
case ZABORT:
log("remote requested for session abort");
stohdr(Z_Txhdr, 0L);
if( zshhdr(ZFIN, Z_Txhdr) < 0 )
gotoexit(PRC_ERROR);
gotoexit(PRC_REMOTEABORTED);
break;
case ZFERR:
if( txstate == ZTX_FINFOACK
|| txstate == ZTX_READCHECK
|| txstate == ZTX_CRCWACK
|| txstate == ZTX_CRCQACK
|| txstate == ZTX_EOFACK )
{
if( txstate == ZTX_READCHECK
|| txstate == ZTX_CRCQACK )
{
if( zsdata(txbuf, 0, ZCRCE, 0) < 0 )
gotoexit(PRC_ERROR);
}
pi->send->status = FSTAT_REFUSED;
log("remote side refused file");
txstate = ZTX_NEXTFILE;
}
break;
default:
log("got unexpected frame %d", ftype);
break;
} /* end of switch(hdr) */
} /* end of if */
} /* end of while */
exit:
DEB((D_PROT, "tx_zmodem: SEND exit = %d", rc));
setalarm(0);
if (pi->send) p_tx_fclose(pi);
if( txbuf ) {
free(txbuf);
txbuf = NULL;
}
return(rc);
}
