v13i094: Full featured xmodem program, v3.4, Part02/03
Rich Salz
rsalz at bbn.com
Fri Mar 4 22:59:34 AEST 1988
Submitted-by: Steve Grandi <grandi at noao.arizona.edu>
Posting-number: Volume 13, Issue 94
Archive-name: xmodem3.4/part02
: This is a shar archive. Extract with sh, not csh.
echo x - getput.c
sed -e 's/^X//' > getput.c << '!Funky!Stuff!'
X/*
X * Contains system routines to get and put bytes, change tty modes, etc
X * Most of the routines are VERY 4.2BSD Specific!!!
X */
X
X#include "xmodem.h"
X
X/*
X *
X * Get a byte from the specified file. Buffer the read so we don't
X * have to use a system call for each character.
X *
X */
Xgetbyte(fildes, ch) /* Buffered disk read */
Xint fildes;
Xchar *ch;
X
X {
X static char buf[BUFSIZ]; /* Remember buffer */
X static char *bufp = buf; /* Remember where we are in buffer */
X
X if (nbchr == 0) /* Buffer exausted; read some more */
X {
X if ((nbchr = read(fildes, buf, BUFSIZ)) < 0)
X error("File Read Error", TRUE);
X bufp = buf; /* Set pointer to start of array */
X }
X if (--nbchr >= 0)
X {
X *ch = *bufp++;
X return(0);
X }
X else
X {
X return(EOF);
X }
X }
X
X/* CRC-16 constant array...
X from Usenet contribution by Mark G. Mendel, Network Systems Corp.
X (ihnp4!umn-cs!hyper!mark)
X*/
X
X/* crctab as calculated by initcrctab() */
Xunsigned short crctab[1<<B] = {
X 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
X 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
X 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
X 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
X 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
X 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
X 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
X 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
X 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
X 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
X 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
X 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
X 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
X 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
X 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
X 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
X 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
X 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
X 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
X 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
X 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
X 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
X 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
X 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
X 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
X 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
X 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
X 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
X 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
X 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
X 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
X 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
X };
X
X/* get a byte from data stream -- timeout if "seconds" elapses */
X/* This routine is VERY 4.2 specific */
X
Xint
Xreadbyte(seconds)
Xint seconds;
X {
X int readfd;
X char c;
X struct timeval tmout;
X
X tmout.tv_sec = seconds;
X tmout.tv_usec = 0;
X
X readfd = 1<<0;
X
X if ((select(1, &readfd, (int *)0, (int *)0, &tmout)) == 0)
X return(TIMEOUT);
X
X read(0, &c, 1);
X
X if (DEBUG)
X fprintf(LOGFP, "DEBUG: readbyte %02xh\n", c & 0xff);
X
X return(c & 0xff); /* return the char */
X }
X
X/*
X get a buffer (length bufsize) from data stream -- timeout if "seconds" elapses.
X Read bunches of characters to save system overhead;
X Further process data while kernel is reading stream (calculating "checksum").
X Try to nap long enough so kernel collects 100 characters or so until we wake up
X unless TOOBUSY is set.
X*/
X
X/* This routine is VERY 4.2 specific */
X
Xint
Xreadbuf(bufsize, seconds, tmode, recvsectcnt, checksum, bufctr)
X
Xint bufsize, /* number of chars to be read */
Xseconds, /* timeout period for each read */
Xtmode, /* transmission mode: TRUE if text, FALSE if binary */
X*checksum, /* pointer to checksum value */
X*bufctr; /* length of actual data string in buffer */
Xlong recvsectcnt; /* running sector count (128 byte sectors) */
X
X{
X int readfd; /* mask for select call */
X struct timeval tmout; /* timeout structure for select */
X int numread; /* number of chars read */
X int left; /* number of chars left to read */
X int recfin = FALSE; /* flag that EOF read */
X char inbuf[BBUFSIZ]; /* buffer for incoming packet */
X register unsigned char c; /* character being processed */
X register unsigned short chksm; /* working copy of checksum */
X register int bfctr; /* working copy of bufctr */
X int j; /* loop index */
X
X tmout.tv_sec = seconds;
X tmout.tv_usec = 0;
X readfd = 1<<0;
X chksm = 0;
X bfctr = 0;
X
X for (left = bufsize; left > 0;) {
X
X /* read however many chars are waiting */
X
X if ((select(1, &readfd, (int *)0, (int *)0, &tmout)) == 0)
X return(TIMEOUT);
X
X numread = read(0, inbuf, left);
X left -= numread;
X
X if (DEBUG)
X fprintf(LOGFP, "DEBUG: readbuf--read %d characters\n", numread);
X
X /* now process part of packet we just read */
X
X for (j = 0; j < numread; j++)
X {
X buff[bfctr] = c = inbuf[j] & 0xff;
X fileread++;
X
X if (CRCMODE) /* CRC */
X chksm = (chksm<<B) ^ crctab[(chksm>>(W-B)) ^ c];
X
X else /* checksum */
X chksm = ((chksm+c) & 0xff);
X
X if (CHECKLENGTH && fileread > filelength) /* past EOF ? */
X continue;
X
X if (tmode) /* text mode processing */
X {
X buff[bfctr] &= 0x7f; /* nuke bit 8 */
X if (c == CR || c == 0) /* skip CRs and nulls */
X continue;
X if (c == CTRLZ) /* CP/M EOF char */
X {
X recfin = TRUE;
X continue;
X }
X if (!recfin) /* dont increment if past EOF */
X bfctr++;
X }
X else /* binary */
X bfctr++;
X
X }
X
X /* go to sleep to save uneeded system calls while kernel
X is reading data from serial line;
X fudge constant from 10000 to 9000 to avoid sleeping too long.
X */
X if (left && !TOOBUSY)
X napms( (left<SLEEPNUM ? left:SLEEPNUM) * 9000/ttyspeed);
X
X }
X
X if (CHECKLENGTH && fileread >= filelength)
X logitarg("File end from YMODEM length found in sector %s\n",
X sectdisp(recvsectcnt,bufsize,1));
X *checksum = chksm;
X *bufctr = bfctr;
X return(0);
X}
X
X/* send a byte to data stream */
X
Xsendbyte(data)
Xchar data;
X {
X if (DEBUG)
X fprintf(LOGFP, "DEBUG: sendbyte %02xh\n", data & 0xff);
X
X if (write(1, &data, 1) != 1) /* write the byte (assume it goes NOW; no flushing needed) */
X error ("Write error on stream", TRUE);
X return;
X }
X
X/* send a buffer to data stream */
X
Xwritebuf(buffer, nbytes)
Xchar *buffer;
Xint nbytes;
X {
X if (DEBUG)
X fprintf(LOGFP, "DEBUG: writebuf (%d bytes)\n", nbytes);
X
X if (write(1, buffer, nbytes) != nbytes) /* write the buffer (assume no TIOCFLUSH needed) */
X error ("Write error on stream", TRUE);
X return;
X }
X
X/*
X * "nap" for specified time -- VERY 4.2BSD specific
X */
X
Xnapms (milliseconds)
Xint milliseconds;
X{
X struct timeval timeout;
X int readfd;
X
X if (milliseconds == 0)
X return;
X if (DEBUG)
X fprintf (LOGFP, "DEBUG: napping for %d ms\n", milliseconds);
X timeout.tv_sec = 0;
X timeout.tv_usec = milliseconds * 1000;
X readfd = 0;
X
X (void) select(1, &readfd, (int *)0, (int *)0, &timeout);
X}
X
X
X/* set and restore tty modes for XMODEM transfers */
X/* These routines are 4.2/v7(?) specific */
X
Xstruct sgttyb ttys, ttysnew; /* for stty terminal mode calls */
Xstruct stat statbuf; /* for terminal message on/off control */
X
Xint wason; /* holds status of tty read write/modes */
Xchar *tty; /* current tty name */
X
X
Xsetmodes()
X {
X char *ttyname();
X
X int n;
X
X extern onintr();
X
X sleep(2); /* let the output appear */
X if (ioctl(0,TIOCGETP,&ttys)<0) /* get tty params [V7] */
X error("Can't get TTY Parameters", TRUE);
X
X tty = ttyname(0); /* identify current tty */
X
X ttysnew.sg_ispeed = ttys.sg_ispeed; /* copy input speed */
X ttysnew.sg_ospeed = ttys.sg_ospeed; /* copy input speed */
X ttysnew.sg_flags |= RAW; /* set for RAW Mode */
X ttysnew.sg_flags &= ~ECHO; /* set for no echoing */
X ttysnew.sg_flags &= ~TANDEM; /* turn off flow control */
X
X /* set new paramters */
X if (ioctl(0,TIOCSETP,&ttysnew) < 0)
X error("Can't set new TTY Parameters", TRUE);
X
X /* Flush characters waiting for read or write */
X n = 0;
X if (ioctl(0,TIOCFLUSH,&n) < 0)
X error("Can't flush terminal queue", TRUE);
X
X /* get tty status */
X if (stat(tty, &statbuf) < 0)
X error("Can't get your TTY Status", TRUE);
X
X if (statbuf.st_mode & 022) /* Need to turn messages off */
X if (chmod(tty, (int)statbuf.st_mode & ~022) < 0)
X error("Can't change TTY mode", TRUE);
X else
X wason = TRUE;
X else
X wason = FALSE;
X
X /* set up signal catcher to restore tty state if we are KILLed */
X
X if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
X signal(SIGTERM, onintr);
X }
X
X/* restore normal tty modes */
X
Xrestoremodes(errcall)
Xint errcall;
X {
X if (wason)
X if (chmod(tty, (int)statbuf.st_mode | 022) < 0)
X error("Can't change TTY mode", FALSE);
X if (ioctl(0,TIOCSETP,&ttys) < 0)
X { if (!errcall)
X error("RESET - Can't restore normal TTY Params", FALSE);
X else
X printf("RESET - Can't restore normal TTY Params\n");
X }
X if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
X signal(SIGTERM, SIG_DFL);
X return;
X }
X
X
X
X
X/* signal catcher */
Xonintr()
X {
X error("Kill signal; bailing out", TRUE);
X }
X
X/* create string with a timestamp for log file */
X
Xchar *stamptime()
X{
X char *asctime(); /* stuff to get timestamp */
X struct tm *localtime(), *tp;
X struct timeval tv;
X struct timezone tz;
X
X gettimeofday (&tv, &tz); /* fill in timestamp */
X tp = localtime ((time_t *)&tv.tv_sec);
X return(asctime(tp));
X}
X
X
X
X/* get tty speed for time estimates */
X
Xgetspeed()
X {
X static int speedtbl[] = {0, 50, 75, 110, 134, 150, 200, 300, 600,
X 1200, 1800, 2400, 4800, 9600, 19200, 0};
X if (ioctl(0,TIOCGETP,&ttys) < 0) /* get tty structure */
X error("Can't get TTY parameters", FALSE);
X
X if (ttys.sg_ispeed >= 0 && ttys.sg_ispeed <= 14)
X {
X ttyspeed = speedtbl[ttys.sg_ispeed];
X logitarg ("Line speed = %d bits per second\n", ttyspeed);
X }
X else
X {
X ttyspeed = 1200;
X logit ("Can't determine line speed; assuming 1200 bps\n");
X }
X }
!Funky!Stuff!
echo x - getput.sysv.c
sed -e 's/^X//' > getput.sysv.c << '!Funky!Stuff!'
X/*
X * Contains system routines to get and put bytes, change tty modes, etc
X * Sys V version. UNTESTED!!!!!!
X */
X
X#include "xmodem.h"
X
X/*
X *
X * Get a byte from the specified file. Buffer the read so we don't
X * have to use a system call for each character.
X *
X */
Xgetbyte(fildes, ch) /* Buffered disk read */
Xint fildes;
Xchar *ch;
X
X {
X static char buf[BUFSIZ]; /* Remember buffer */
X static char *bufp = buf; /* Remember where we are in buffer */
X
X if (nbchr == 0) /* Buffer exausted; read some more */
X {
X if ((nbchr = read(fildes, buf, BUFSIZ)) < 0)
X error("File Read Error", TRUE);
X bufp = buf; /* Set pointer to start of array */
X }
X if (--nbchr >= 0)
X {
X *ch = *bufp++;
X return(0);
X }
X else
X {
X return(EOF);
X }
X }
X
X/* CRC-16 constant array...
X from Usenet contribution by Mark G. Mendel, Network Systems Corp.
X (ihnp4!umn-cs!hyper!mark)
X*/
X
X/* crctab as calculated by initcrctab() */
Xunsigned short crctab[1<<B] = {
X 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
X 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
X 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
X 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
X 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
X 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
X 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
X 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
X 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
X 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
X 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
X 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
X 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
X 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
X 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
X 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
X 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
X 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
X 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
X 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
X 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
X 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
X 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
X 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
X 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
X 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
X 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
X 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
X 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
X 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
X 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
X 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
X };
X
X/* get a byte from data stream -- timeout if "seconds" elapses */
X
Xint timedout;
X
Xint
Xreadbyte(seconds)
Xint seconds;
X{
X int force_it();
X char c;
X signal(SIGALRM, force_it);
X
X timedout = 0;
X alarm(seconds);
X read(0, &c, 1);
X alarm(0);
X if (timedout)
X return(TIMEOUT);
X if (DEBUG)
X fprintf(LOGFP, "DEBUG: readbyte %02xh\n", c & 0xff);
X return(c & 0xff);
X}
X
Xint
Xforce_it()
X{
X timedout++;
X return;
X}
X
X/*
X get a buffer (length bufsize) from data stream -- timeout if "seconds" elapses.
X Read bunches of characters to save system overhead;
X Further process data while kernel is reading stream (calculating "checksum").
X Try to nap long enough so kernel collects 100 characters or so until we wake up
X unless TOOBUSY is set.
X*/
X
X
Xint
Xreadbuf(bufsize, seconds, tmode, recvsectcnt, checksum, bufctr)
X
Xint bufsize, /* number of chars to be read */
Xseconds, /* timeout period for each read */
Xtmode, /* transmission mode: TRUE if text, FALSE if binary */
X*checksum, /* pointer to checksum value */
X*bufctr; /* length of actual data string in buffer */
Xlong recvsectcnt; /* running sector count (128 byte sectors) */
X
X{
X int force_it();
X int numread; /* number of chars read */
X int left; /* number of chars left to read */
X int recfin = 0; /* flag that EOF read */
X char inbuf[BBUFSIZ]; /* buffer for incoming packet */
X register unsigned char c; /* character being processed */
X register unsigned short chksm; /* working copy of checksum */
X register int bfctr; /* working copy of bufctr */
X int j; /* loop index */
X
X signal(SIGALRM, force_it);
X chksm = 0;
X bfctr = 0;
X
X for (left = bufsize; left > 0;) {
X
X /* read however many chars are waiting */
X timedout = 0;
X alarm(seconds);
X numread = read(0, inbuf, left);
X alarm(0);
X if (timedout)
X return(TIMEOUT);
X left -= numread;
X
X if (DEBUG)
X fprintf(LOGFP, "DEBUG: readbuf--read %d characters\n", numread);
X
X /* now process part of packet we just read */
X
X for (j = 0; j < numread; j++)
X {
X buff[bfctr] = c = inbuf[j] & 0xff;
X fileread++;
X
X if (CRCMODE) /* CRC */
X chksm = (chksm<<B) ^ crctab[(chksm>>(W-B)) ^ c];
X
X else /* checksum */
X chksm = ((chksm+c) & 0xff);
X
X if (CHECKLENGTH && fileread > filelength) /* past EOF ? */
X continue;
X
X if (tmode) /* text mode processing */
X {
X buff[bfctr] &= 0x7f; /* nuke bit 8 */
X if (c == CR || c == 0) /* skip CRs and nulls */
X continue;
X if (c == CTRLZ) /* CP/M EOF char */
X {
X recfin = TRUE;
X continue;
X }
X if (!recfin) /* dont increment if past EOF */
X bfctr++;
X }
X else /* binary */
X bfctr++;
X
X }
X
X /* go to sleep to save uneeded system calls while kernel
X is reading data from serial line, fudge constant from 10 to
X 9 to avoid sleeping too long
X */
X if (left && !TOOBUSY)
X sleep ((left<SLEEPNUM ? left:SLEEPNUM) * 9/ttyspeed);
X }
X
X if (CHECKLENGTH && fileread >= filelength)
X logitarg("File end from YMODEM length found in sector %s\n",
X sectdisp(recvsectcnt,bufsize,1));
X *checksum = chksm;
X *bufctr = bfctr;
X return(0);
X}
X
X/* send a byte to data stream */
X
Xsendbyte(data)
Xchar data;
X {
X if (DEBUG)
X fprintf(LOGFP, "DEBUG: sendbyte %02xh\n", data & 0xff);
X
X if (write(1, &data, 1) != 1) /* write the byte (assume it goes NOW; no flushing needed) */
X error ("Write error on stream", TRUE);
X return;
X }
X
X/* send a buffer to data stream */
X
Xwritebuf(buffer, nbytes)
Xchar *buffer;
Xint nbytes;
X {
X if (DEBUG)
X fprintf(LOGFP, "DEBUG: writebuf (%d bytes)\n", nbytes);
X
X if (write(1, buffer, nbytes) != nbytes) /* write the buffer (assume no TIOCFLUSH needed) */
X error ("Write error on stream", TRUE);
X return;
X }
X
X/* set and restore tty modes for XMODEM transfers */
X
Xstruct termio ttys;
Xstruct stat statbuf; /* for terminal message on/off control */
X
Xint wason; /* holds status of tty read write/modes */
Xchar *tty; /* current tty name */
X
X
Xsetmodes()
X {
X char *ttyname();
X struct termio ttysnew;
X
X extern onintr();
X
X sleep(2); /* let the output appear */
X if (ioctl(0,TCGETA,&ttys)<0) /* get tty params [V7] */
X error("Can't get TTY Parameters", TRUE);
X
X tty = ttyname(0); /* identify current tty */
X
X if (ioctl(0,TCGETA,&ttysnew)<0) /* get tty params */
X error("Can't get TTY Parameters", TRUE);
X ttysnew.c_cc[4] = 1; /* VMIN */
X ttysnew.c_cc[5] = 0; /* VTIME */
X ttysnew.c_iflag = 0;
X ttysnew.c_oflag = 0;
X ttysnew.c_lflag = 0;
X ttysnew.c_cflag &= ~CSIZE;
X ttysnew.c_cflag |= CS8;
X ttysnew.c_cflag &= ~PARENB;
X if (ioctl(0,TCSETA,&ttysnew)<0) /* set new paramters */
X error("Can't set new TTY Parameters", TRUE);
X
X if (stat(tty, &statbuf) < 0) /* get tty status */
X error("Can't get your TTY Status", TRUE);
X
X if (statbuf.st_mode & 022) /* Need to turn messages off */
X if (chmod(tty, (int)statbuf.st_mode & ~022) < 0)
X error("Can't change TTY mode", TRUE);
X else
X wason = TRUE;
X else
X wason = FALSE;
X
X /* set up signal catcher to restore tty state if we are KILLed */
X
X if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
X signal(SIGTERM, onintr);
X }
X
X/* restore normal tty modes */
X
Xrestoremodes(errcall)
Xint errcall;
X {
X if (wason)
X if (chmod(tty, (int)statbuf.st_mode | 022) < 0)
X error("Can't change TTY mode", FALSE);
X if (ioctl(0,TCSETA,&ttys) < 0)
X { if (!errcall)
X error("RESET - Can't restore normal TTY Params", FALSE);
X else
X printf("RESET - Can't restore normal TTY Params\n");
X }
X if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
X signal(SIGTERM, SIG_DFL);
X return;
X }
X
X
X
X
X/* signal catcher */
Xonintr()
X {
X error("Kill signal; bailing out", TRUE);
X }
X
X/* create string with a timestamp for log file */
X
Xchar *stamptime()
X{
X char *asctime(); /* stuff to get timestamp */
X struct tm *localtime(), *tp;
X long now;
X
X time(&now);
X tp = localtime(now);
X return(asctime(tp));
X}
X
X
X
X/* get tty speed for time estimates */
X
Xgetspeed()
X {
X static int speedtbl[] = {0, 50, 75, 110, 134, 150, 200, 300, 600,
X 1200, 1800, 2400, 4800, 9600, 19200, 0};
X struct termio ttystemp;
X
X if (ioctl(0,TCGETA,&ttystemp) < 0) /* get tty structure */
X error("Can't get TTY parameters", FALSE);
X if ((ttystemp.c_cflag & 017) >= 0 && (ttystemp.c_cflag && 017) <= 14)
X {
X ttyspeed = speedtbl[ttystemp.c_cflag & 017];
X logitarg ("Line speed = %d bits per second\n", ttyspeed);
X }
X else
X {
X ttyspeed = 1200;
X logit ("Can't determine line speed; assuming 1200 bps\n");
X }
X }
!Funky!Stuff!
echo x - send.c
sed -e 's/^X//' > send.c << '!Funky!Stuff!'
X/** send a file **/
X
X/*
X * Operation of this routine depends on on MDM7BAT and YMDMBAT flags.
X *
X * If "name" is NULL; close out the BATCH send.
X */
X
X#include "xmodem.h"
X
Xsfile(name)
Xchar *name;
X {
X
X char *sectdisp();
X time_t time();
X char *strcpy();
X char *unix_cpm();
X
X extern unsigned short crctab[1<<B]; /* CRC-16 constant values, see getput.c */
X
X register int bufctr, /* array index for data buffer */
X sectnum; /* packet number for packet header */
X
X register unsigned short checksum; /* checksum/crc */
X
X char blockbuf[BBUFSIZ+6]; /* holds packet as it is constructed */
X
X struct stat filestatbuf; /* file status info */
X
X int fd, /* file descriptor for file being transmitted */
X attempts, /* number of attempts made to transmit a packet */
X nlflag, /* flag that we have to send a LF in next packet */
X sendfin, /* flag that we are sending the last packet */
X closeout, /* flag that we are closing out batch send */
X startup, /* flag that we are starting batch send */
X tmode, /* TRUE for text mode; FALSE for binary mode */
X bbufcnt, /* array index for packet */
X firstchar, /* first character in protocol transaction */
X bufsize, /* packet size (128 or 1024) */
X sendresp, /* response char to sent block received from remote*/
X extrachar; /* count of extra LF characters added */
X long sentsect; /* count of 128 byte sectors actually sent */
X long expsect; /* count of 128 byte sectors expected to be sent */
X time_t start; /* starting time of transfer */
X char c;
X
X nbchr = 0; /* clear buffered read char count */
X
X CRCMODE = FALSE; /* Receiver determines use of crc or checksum */
X
X closeout = FALSE; startup = TRUE; /* indicate state of batch transfer */
X
X /* Check on NULL file name */
X if (strcmp(name,"") == 0)
X {
X if (BATCH)
X closeout = TRUE;
X else
X {
X sendbyte(CAN); sendbyte(CAN); sendbyte(CAN);
X error("NULL file name in send", TRUE);
X }
X }
X
X if (!closeout) /* Are we closing down batch? */
X { /* no; let's send a file */
X if ((fd = open(name, 0)) < 0)
X {
X sendbyte(CAN); sendbyte(CAN); sendbyte(CAN);
X error("Can't open file for send", TRUE);
X }
X
X stat(name, &filestatbuf); /* get file status bytes */
X expsect = (filestatbuf.st_size/128) + 1;
X
X if (LOGFLAG)
X {
X fprintf(LOGFP, "----\nXMODEM Send Function\n");
X fprintf(LOGFP, "File Name: %s\n", name);
X fprintf(LOGFP,"Estimated File Size %ldK, %ld Records, %ld Bytes\n",
X (filestatbuf.st_size/1024)+1, expsect, filestatbuf.st_size);
X projtime(expsect, LOGFP);
X }
X }
X else
X {
X logit("----\nXMODEM Send Function\n");
X logit("Closing down Batch Transmission\n");
X }
X
X
X tmode = (XMITTYPE == 't') ? TRUE : FALSE; /* set text mode */
X
X bufsize = LONGPACK ? 1024 : 128; /* set sector size */
X if (LONGPACK && !closeout)
X logit("1K packet mode chosen\n");
X
X sendfin = nlflag = FALSE;
X attempts = 0;
X
X /* wait for and read startup character */
Xrestart:
X do
X {
X while (((firstchar=readbyte(1)) != NAK) && (firstchar != CRCCHR) && (firstchar != CAN))
X if (++attempts > NAKMAX)
X {
X if (MDM7BAT && startup)
X {
X sendbyte(ACK); sendbyte(EOT);
X }
X error("Remote System Not Responding", TRUE);
X }
X
X if ((firstchar & 0x7f) == CAN)
X if (readbyte(3) == CAN)
X error("Send cancelled at user's request",TRUE);
X
X if (firstchar == CRCCHR)
X {
X CRCMODE = TRUE;
X if (!closeout)
X logit("CRC mode requested\n");
X if (readbyte(1) == KCHR)
X {
X LONGPACK = TRUE;
X logit("Receiver invoked 1K packet mode\n");
X }
X }
X }
X while (firstchar != NAK && firstchar != CRCCHR);
X
X if (MDM7BAT && closeout) /* close out MODEM7 batch */
X {
X sendbyte(ACK); sendbyte (EOT);
X readbyte(2); /* flush junk */
X return;
X }
X
X if (MDM7BAT && startup) /* send MODEM7 file name */
X {
X if (send_name(unix_cpm(name)) == -1)
X {
X attempts = 0;
X goto restart;
X }
X startup = FALSE;
X attempts = 0;
X goto restart;
X }
X
X sectnum = 1;
X
X if (YMDMBAT) /* Fudge for YMODEM transfer (to send name packet) */
X {
X sectnum = 0;
X bufsize = 128;
X }
X
X attempts = sentsect = extrachar = 0;
X start = time((time_t *) 0);
X
X do /* outer packet building/sending loop; loop till whole file is sent */
X {
X
X if (closeout && YMDMBAT && sectnum == 1) /* close out YMODEM */
X return;
X
X if (YMDMBAT && sectnum == 1) /* get set to send YMODEM data packets */
X {
X bufsize = LONGPACK ? 1024 : 128;
X do
X {
X while (((firstchar=readbyte(3)) != CRCCHR) && (firstchar != CAN))
X if (++attempts > STERRORMAX)
X error("YMODEM protocol botch, C expected", TRUE);
X if ((firstchar&0x7f) == CAN)
X if (readbyte(3) == CAN)
X error("Send cancelled at User's request", TRUE);
X }
X while (firstchar != CRCCHR);
X attempts = 0;
X }
X
X if (extrachar >= 128) /* update expected sector count */
X {
X extrachar = 0;
X expsect++;
X }
X
X if ((bufsize == 1024) && (attempts > KSWMAX))
X {
X logit("Reducing packet size to 128 due to excessive errors\n");
X bufsize = 128;
X }
X
X if ((bufsize == 1024) && ((expsect - sentsect) < 8))
X {
X logit("Reducing packet size to 128 for tail end of file\n");
X bufsize = 128;
X }
X
X if (sectnum > 0) /* data packet */
X {
X for (bufctr=0; bufctr < bufsize;)
X {
X if (nlflag)
X {
X buff[bufctr++] = LF; /* leftover newline */
X nlflag = FALSE;
X }
X if (getbyte(fd, &c) == EOF)
X {
X sendfin = TRUE; /* this is the last sector */
X if (!bufctr) /* if EOF on sector boundary */
X break; /* avoid sending extra sector */
X buff[bufctr++] = CTRLZ; /* pad with Ctrl-Z for CP/M EOF (even do for binary files) */
X continue;
X }
X
X if (tmode && c == LF) /* text mode & Unix newline? */
X {
X extrachar++;
X buff[bufctr++] = CR; /* insert carriage return */
X if (bufctr < bufsize)
X buff[bufctr++] = LF; /* insert LF */
X else
X nlflag = TRUE; /* insert on next sector */
X }
X else
X buff[bufctr++] = c; /* copy the char without change */
X }
X
X if (!bufctr) /* if EOF on sector boundary */
X break; /* avoid sending empty sector */
X }
X
X else /* YMODEM filename packet */
X {
X for (bufctr=0; bufctr<bufsize; bufctr++) /* zero packet */
X buff[bufctr]=0;
X if (!closeout)
X {
X cpmify(name);
X strcpy((char *)buff, name);
X if (!tmode) /* put in file length etc. only if binary transfer */
X {
X register char *p;
X p = (char *)buff + strlen(name) + 1;
X sprintf(p, "%lu %lo %o", filestatbuf.st_size,
X filestatbuf.st_mtime, filestatbuf.st_mode);
X logitarg("YMODEM header information: %s\n", p);
X }
X buff[bufsize-2] = (expsect & 0xff); /* put in KMD kludge information */
X buff[bufsize-1] = ((expsect >> 8) & 0xff);
X }
X }
X
X bbufcnt = 0; /* start building block to be sent */
X blockbuf[bbufcnt++] = (bufsize == 1024) ? STX : SOH; /* start of packet char */
X blockbuf[bbufcnt++] = sectnum; /* current sector # */
X blockbuf[bbufcnt++] = ~sectnum; /* and its complement */
X
X checksum = 0; /* initialize checksum */
X for (bufctr=0; bufctr < bufsize; bufctr++)
X {
X blockbuf[bbufcnt++] = buff[bufctr];
X
X if (CRCMODE)
X checksum = (checksum<<B) ^ crctab[(checksum>>(W-B)) ^ buff[bufctr]];
X
X else
X checksum = ((checksum+buff[bufctr]) & 0xff);
X }
X
X if (CRCMODE) /* put in CRC */
X {
X checksum &= 0xffff;
X blockbuf[bbufcnt++] = ((checksum >> 8) & 0xff);
X blockbuf[bbufcnt++] = (checksum & 0xff);
X }
X else /* put in checksum */
X blockbuf[bbufcnt++] = checksum;
X
X attempts = 0;
X
X do /* inner packet loop */
X {
X
X writebuf(blockbuf, bbufcnt); /* write the block */
X
X if (DEBUG)
X fprintf (LOGFP, "DEBUG: %d byte Packet %02xh (%02xh) sent, checksum %02xh %02xh\n",
X bbufcnt, blockbuf[1]&0xff, blockbuf[2]&0xff, blockbuf[bufsize+3]&0xff, blockbuf[bufsize+4]&0xff);
X
X attempts++;
X sendresp = readbyte(10); /* get response from remote */
X
X if (sendresp != ACK)
X {
X if (sendresp == TIMEOUT)
X {
X logitarg("Timeout on sector %s\n",sectdisp(sentsect,bufsize,1));
X }
X else if (sendresp == NAK)
X {
X logitarg("NAK on sector %s\n",sectdisp(sentsect,bufsize,1));
X }
X else
X {
X logitarg("Non-ACK on sector %s\n",sectdisp(sentsect,bufsize,1));
X }
X }
X }
X while((sendresp != ACK) && (attempts < ERRORMAX)); /* close of inner loop */
X
X sectnum++; /* increment to next sector number */
X sentsect += (bufsize == 128) ? 1 : 8;
X }
X while (!sendfin && ( attempts < ERRORMAX)); /* end of outer loop */
X
X if (attempts > ERRORMAX)
X {
X sendbyte(CAN); sendbyte(CAN); sendbyte(CAN); sendbyte(CAN); sendbyte(CAN);
X error ("Too many errors in transmission", TRUE);
X }
X
X attempts = 0;
X sendbyte(EOT); /* send 1st EOT to close down transfer */
X
X while ((readbyte(15) != ACK) && (attempts++ < EOTMAX)) /* wait for ACK of EOT */
X {
X if (attempts > 1)
X logitarg("EOT not ACKed, try %d\n", attempts);
X sendbyte(EOT);
X }
X
X if (attempts >= RETRYMAX)
X error("Remote System Not Responding on Completion", TRUE);
X
X close(fd);
X
X logit("Send Complete\n");
X prtime(sentsect, time((time_t *) 0) - start);
X }
!Funky!Stuff!
exit
--
Please send comp.sources.unix-related mail to rsalz at uunet.uu.net.
More information about the Comp.sources.unix
mailing list