/*
* 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;
}
/*
* 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;
}
/*
* 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;
}
}
}
}
/* ------------------------------------------------------------------------- */
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);
}
