lostecho/oldlinux-files
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

add directory study

Browse Source
This commit is contained in:
gohigh
2024-02-19 00:25:23 -05:00
parent b1306b38b1
commit f3774e2f8c
4001 changed files with 2285787 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/Makefile Normal file
View File

@@ -0,0 +1,14 @@
all: rz sz
CFLAGS= -DV7 -D_MINIX -D_POSIX_SOURCE -DLCASE=0
rz: rz.c rbsb.c zm.c zmodem.h
$(CC) $(CFLAGS) -o rz rz.c
chmem =10000 rz
sz: sz.c rbsb.c zm.c zmodem.h
$(CC) $(CFLAGS) -o sz sz.c
chmem =10000 sz
clean:
@rm -f *.bak *.s rz sz

14
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/Makefile.68K Normal file
View File

@@ -0,0 +1,14 @@
all: rz sz
CFLAGS= -DV7 -D_MINIX -D_POSIX_SOURCE -DLCASE=0 -O
rz: rz.c rbsb.c zm.c zmodem.h
$(CC) $(CFLAGS) -o rz rz.c
chmem =10000 rz
sz: sz.c rbsb.c zm.c zmodem.h
$(CC) $(CFLAGS) -o sz sz.c
chmem =10000 sz
clean:
@rm -f *.bak *.o rz sz

140
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/crctab.c Normal file
View File

@@ -0,0 +1,140 @@
/*
* Crc calculation stuff
*/
/* crctab calculated by Mark G. Mendel, Network Systems Corporation */
static unsigned short crctab[256] = {
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
};
/*
* updcrc macro derived from article Copyright (C) 1986 Stephen Satchell.
* NOTE: First srgument must be in range 0 to 255.
* Second argument is referenced twice.
*
* Programmers may incorporate any or all code into their programs,
* giving proper credit within the source. Publication of the
* source routines is permitted so long as proper credit is given
* to Stephen Satchell, Satchell Evaluations and Chuck Forsberg,
* Omen Technology.
*/
#define updcrc(cp, crc) ( crctab[((crc >> 8) & 255)] ^ (crc << 8) ^ cp)
/*
* Copyright (C) 1986 Gary S. Brown. You may use this program, or
* code or tables extracted from it, as desired without restriction.
*/
/* First, the polynomial itself and its table of feedback terms. The */
/* polynomial is */
/* X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0 */
/* Note that we take it "backwards" and put the highest-order term in */
/* the lowest-order bit. The X^32 term is "implied"; the LSB is the */
/* X^31 term, etc. The X^0 term (usually shown as "+1") results in */
/* the MSB being 1. */
/* Note that the usual hardware shift register implementation, which */
/* is what we're using (we're merely optimizing it by doing eight-bit */
/* chunks at a time) shifts bits into the lowest-order term. In our */
/* implementation, that means shifting towards the right. Why do we */
/* do it this way? Because the calculated CRC must be transmitted in */
/* order from highest-order term to lowest-order term. UARTs transmit */
/* characters in order from LSB to MSB. By storing the CRC this way, */
/* we hand it to the UART in the order low-byte to high-byte; the UART */
/* sends each low-bit to hight-bit; and the result is transmission bit */
/* by bit from highest- to lowest-order term without requiring any bit */
/* shuffling on our part. Reception works similarly. */
/* The feedback terms table consists of 256, 32-bit entries. Notes: */
/* */
/* The table can be generated at runtime if desired; code to do so */
/* is shown later. It might not be obvious, but the feedback */
/* terms simply represent the results of eight shift/xor opera- */
/* tions for all combinations of data and CRC register values. */
/* */
/* The values must be right-shifted by eight bits by the "updcrc" */
/* logic; the shift must be unsigned (bring in zeroes). On some */
/* hardware you could probably optimize the shift in assembler by */
/* using byte-swap instructions. */
static long cr3tab[] = { /* CRC polynomial 0xedb88320 */
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
#ifdef NFGM
long
UPDC32(b, c)
long c;
{
return (cr3tab[((int)c ^ b) & 0xff] ^ ((c >> 8) & 0x00FFFFFF));
}
#else
#define UPDC32(b, c) (cr3tab[((int)c ^ b) & 0xff] ^ ((c >> 8) & 0x00FFFFFF))
#endif
/* End of crctab.c */

343
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/rbsb.c Normal file
View File

@@ -0,0 +1,343 @@
/*
*
* Rev 05-05-1988
* This file contains Unix specific code for setting terminal modes,
* very little is specific to ZMODEM or YMODEM per se (that code is in
* sz.c and rz.c). The CRC-16 routines used by XMODEM, YMODEM, and ZMODEM
* are also in this file, a fast table driven macro version
*
* V7/BSD HACKERS: SEE NOTES UNDER mode(2) !!!
*
* This file is #included so the main file can set parameters such as HOWMANY.
* See the main files (rz.c/sz.c) for compile instructions.
*/
#ifdef V7
#include <sys/types.h>
#include <sys/stat.h>
#include <sgtty.h>
#define OS "V7/BSD"
#ifdef LLITOUT
long Locmode; /* Saved "local mode" for 4.x BSD "new driver" */
long Locbit = LLITOUT; /* Bit SUPPOSED to disable output translations */
#include <strings.h>
#endif
#endif
#ifndef OS
#ifndef USG
#define USG
#endif
#endif
#ifdef USG
#include <sys/types.h>
#include <sys/stat.h>
#include <termio.h>
#include <sys/ioctl.h>
#define OS "SYS III/V"
#define MODE2OK
#include <string.h>
#endif
#if HOWMANY > 255
Howmany must be 255 or less
#endif
/*
* return 1 iff stdout and stderr are different devices
* indicating this program operating with a modem on a
* different line
*/
int Fromcu; /* Were called from cu or yam */
from_cu()
{
struct stat a, b;
fstat(1, &a); fstat(2, &b);
Fromcu = a.st_rdev != b.st_rdev;
return;
}
cucheck()
{
if (Fromcu)
fprintf(stderr,"Please read the manual page BUGS chapter!\r\n");
}
struct {
unsigned baudr;
int speedcode;
} speeds[] = {
110, B110,
300, B300,
#ifdef B600
600, B600,
#endif
1200, B1200,
2400, B2400,
4800, B4800,
9600, B9600,
#ifdef EXTA
19200, EXTA,
38400, EXTB,
#endif
0,
};
int Twostop; /* Use two stop bits */
#ifndef READCHECK
#ifdef FIONREAD
#define READCHECK
/*
* Return non 0 iff something to read from io descriptor f
*/
rdchk(f)
{
static long lf;
ioctl(f, FIONREAD, &lf);
return ((int) lf);
}
#endif
#ifdef SV
#define READCHECK
#include <fcntl.h>
char checked = '\0' ;
/*
* Nonblocking I/O is a bit different in System V, Release 2
*/
rdchk(f)
{
int lf, savestat;
savestat = fcntl(f, F_GETFL) ;
fcntl(f, F_SETFL, savestat | O_NDELAY) ;
lf = read(f, &checked, 1) ;
fcntl(f, F_SETFL, savestat) ;
return(lf) ;
}
#endif
#endif
static unsigned
getspeed(code)
{
register n;
for (n=0; speeds[n].baudr; ++n)
if (speeds[n].speedcode == code)
return speeds[n].baudr;
return 38400; /* Assume fifo if ioctl failed */
}
#ifdef ICANON
struct termio oldtty, tty;
#else
struct sgttyb oldtty, tty;
struct tchars oldtch, tch;
#endif
int iofd = 0; /* File descriptor for ioctls & reads */
/*
* mode(n)
* 3: save old tty stat, set raw mode with flow control
* 2: set XON/XOFF for sb/sz with ZMODEM or YMODEM-g
* 1: save old tty stat, set raw mode
* 0: restore original tty mode
*/
mode(n)
{
static did0 = FALSE;
vfile("mode:%d", n);
switch(n) {
#ifdef USG
case 2: /* Un-raw mode used by sz, sb when -g detected */
if(!did0)
(void) ioctl(iofd, TCGETA, &oldtty);
tty = oldtty;
tty.c_iflag = BRKINT|IXON;
tty.c_oflag = 0; /* Transparent output */
tty.c_cflag &= ~PARENB; /* Disable parity */
tty.c_cflag |= CS8; /* Set character size = 8 */
if (Twostop)
tty.c_cflag |= CSTOPB; /* Set two stop bits */
#ifdef READCHECK
tty.c_lflag = Zmodem ? 0 : ISIG;
tty.c_cc[VINTR] = Zmodem ? -1:030; /* Interrupt char */
#else
tty.c_lflag = ISIG;
tty.c_cc[VINTR] = Zmodem ? 03:030; /* Interrupt char */
#endif
tty.c_cc[VQUIT] = -1; /* Quit char */
#ifdef NFGVMIN
tty.c_cc[VMIN] = 1;
#else
tty.c_cc[VMIN] = 3; /* This many chars satisfies reads */
#endif
tty.c_cc[VTIME] = 1; /* or in this many tenths of seconds */
(void) ioctl(iofd, TCSETAW, &tty);
did0 = TRUE;
return OK;
case 1:
case 3:
if(!did0)
(void) ioctl(iofd, TCGETA, &oldtty);
tty = oldtty;
tty.c_iflag = n==3 ? (IGNBRK|IXOFF) : IGNBRK;
/* No echo, crlf mapping, INTR, QUIT, delays, no erase/kill */
tty.c_lflag &= ~(ECHO | ICANON | ISIG);
tty.c_oflag = 0; /* Transparent output */
tty.c_cflag &= ~PARENB; /* Same baud rate, disable parity */
tty.c_cflag |= CS8; /* Set character size = 8 */
if (Twostop)
tty.c_cflag |= CSTOPB; /* Set two stop bits */
#ifdef NFGVMIN
tty.c_cc[VMIN] = 1; /* This many chars satisfies reads */
#else
tty.c_cc[VMIN] = HOWMANY; /* This many chars satisfies reads */
#endif
tty.c_cc[VTIME] = 1; /* or in this many tenths of seconds */
(void) ioctl(iofd, TCSETAW, &tty);
did0 = TRUE;
Baudrate = getspeed(tty.c_cflag & CBAUD);
return OK;
#endif
#ifdef V7
/*
* NOTE: this should transmit all 8 bits and at the same time
* respond to XOFF/XON flow control. If no FIONREAD or other
* READCHECK alternative, also must respond to INTRRUPT char
* This doesn't work with V7. It should work with LLITOUT,
* but LLITOUT was broken on the machine I tried it on.
*/
case 2: /* Un-raw mode used by sz, sb when -g detected */
if(!did0) {
#ifdef TIOCEXCL
ioctl(iofd, TIOCEXCL, 0);
#endif
ioctl(iofd, TIOCGETP, &oldtty);
ioctl(iofd, TIOCGETC, (struct sgttyb *) &oldtch);
#ifdef LLITOUT
ioctl(iofd, TIOCLGET, &Locmode);
#endif
}
tty = oldtty;
tch = oldtch;
#ifdef READCHECK
tch.t_intrc = Zmodem ? -1:030; /* Interrupt char */
#else
tch.t_intrc = Zmodem ? 03:030; /* Interrupt char */
#endif
#ifdef ODDP
tty.sg_flags |= ODDP;
#endif
#ifdef EVENP
tty.sg_flags |= EVENP;
#endif
#ifdef CBREAK
tty.sg_flags |= CBREAK;
#endif
#ifdef ALLDELAY
tty.sg_flags &= ~ALLDELAY;
#endif
#ifdef CRMOD
tty.sg_flags &= ~CRMOD;
#endif
#ifdef ECHO
tty.sg_flags &= ~ECHO;
#endif
#ifdef LCASE
tty.sg_flags &= ~LCASE;
#endif
ioctl(iofd, TIOCSETP, &tty);
ioctl(iofd, TIOCSETC, (struct sgttyb *) &tch);
#ifdef LLITOUT
ioctl(iofd, TIOCLBIS, &Locbit);
#endif
bibi(99); /* un-raw doesn't work w/o lit out */
did0 = TRUE;
return OK;
case 1:
case 3:
if(!did0) {
#ifdef TIOCEXCL
ioctl(iofd, TIOCEXCL, 0);
#endif
ioctl(iofd, TIOCGETP, &oldtty);
ioctl(iofd, TIOCGETC, (struct sgttyb *) &oldtch);
#ifdef LLITOUT
ioctl(iofd, TIOCLGET, &Locmode);
#endif
}
tty = oldtty;
tty.sg_flags |= RAW;
tty.sg_flags &= ~ECHO;
ioctl(iofd, TIOCSETP, &tty);
did0 = TRUE;
Baudrate = getspeed(tty.sg_ospeed);
return OK;
#endif
case 0:
if(!did0)
return ERROR;
#ifdef USG
(void) ioctl(iofd, TCSBRK, 1); /* Wait for output to drain */
(void) ioctl(iofd, TCFLSH, 1); /* Flush input queue */
(void) ioctl(iofd, TCSETAW, &oldtty); /* Restore modes */
(void) ioctl(iofd, TCXONC,1); /* Restart output */
#endif
#ifdef V7
ioctl(iofd, TIOCSETP, &oldtty);
ioctl(iofd, TIOCSETC, (struct sgttyb *) &oldtch);
#ifdef TIOCNXCL
ioctl(iofd, TIOCNXCL, 0);
#endif
#ifdef LLITOUT
ioctl(iofd, TIOCLSET, &Locmode);
#endif
#endif
return OK;
default:
return ERROR;
}
}
sendbrk()
{
#ifdef V7
#ifdef TIOCSBRK
#define CANBREAK
sleep(1);
ioctl(iofd, TIOCSBRK, 0);
sleep(1);
ioctl(iofd, TIOCCBRK, 0);
#endif
#endif
#ifdef USG
#define CANBREAK
ioctl(iofd, TCSBRK, 0);
#endif
}
/* End of rbsb.c */

BIN
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/rz.c.gz Normal file
View File

Binary file not shown.

BIN
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/sz.c.gz Normal file
View File

Binary file not shown.

777
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/zm.c Normal file
View File

@@ -0,0 +1,777 @@
/*
* Z M . C
* ZMODEM protocol primitives
* 05-09-88 Chuck Forsberg Omen Technology Inc
*
* Entry point Functions:
* zsbhdr(type, hdr) send binary header
* zshhdr(type, hdr) send hex header
* zgethdr(hdr, eflag) receive header - binary or hex
* zsdata(buf, len, frameend) send data
* zrdata(buf, len) receive data
* stohdr(pos) store position data in Txhdr
* long rclhdr(hdr) recover position offset from header
*/
#ifndef CANFDX
#include "zmodem.h"
int Rxtimeout = 100; /* Tenths of seconds to wait for something */
#endif
#ifndef UNSL
#define UNSL
#endif
/* Globals used by ZMODEM functions */
int Rxframeind; /* ZBIN ZBIN32, or ZHEX type of frame received */
int Rxtype; /* Type of header received */
int Rxcount; /* Count of data bytes received */
char Rxhdr[4]; /* Received header */
char Txhdr[4]; /* Transmitted header */
long Rxpos; /* Received file position */
long Txpos; /* Transmitted file position */
int Txfcs32; /* TURE means send binary frames with 32 bit FCS */
int Crc32t; /* Display flag indicating 32 bit CRC being sent */
int Crc32; /* Display flag indicating 32 bit CRC being received */
int Znulls; /* Number of nulls to send at beginning of ZDATA hdr */
char Attn[ZATTNLEN+1]; /* Attention string rx sends to tx on err */
static lastsent; /* Last char we sent */
static Not8bit; /* Seven bits seen on header */
static char *frametypes[] = {
"Carrier Lost", /* -3 */
"TIMEOUT", /* -2 */
"ERROR", /* -1 */
#define FTOFFSET 3
"ZRQINIT",
"ZRINIT",
"ZSINIT",
"ZACK",
"ZFILE",
"ZSKIP",
"ZNAK",
"ZABORT",
"ZFIN",
"ZRPOS",
"ZDATA",
"ZEOF",
"ZFERR",
"ZCRC",
"ZCHALLENGE",
"ZCOMPL",
"ZCAN",
"ZFREECNT",
"ZCOMMAND",
"ZSTDERR",
"xxxxx"
#define FRTYPES 22 /* Total number of frame types in this array */
/* not including psuedo negative entries */
};
static char badcrc[] = "Bad CRC";
/* Send ZMODEM binary header hdr of type type */
zsbhdr(type, hdr)
register char *hdr;
{
register int n;
register unsigned short crc;
vfile("zsbhdr: %s %lx", frametypes[type+FTOFFSET], rclhdr(hdr));
if (type == ZDATA)
for (n = Znulls; --n >=0; )
xsendline(0);
xsendline(ZPAD); xsendline(ZDLE);
if (Crc32t=Txfcs32)
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();
}
/* Send ZMODEM binary header hdr of type type */
zsbh32(hdr, type)
register char *hdr;
{
register int n;
register 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;
}
}
/* Send ZMODEM HEX header hdr of type type */
zshhdr(type, hdr)
register char *hdr;
{
register int n;
register unsigned short crc;
vfile("zshhdr: %s %lx", frametypes[type+FTOFFSET], rclhdr(hdr));
sendline(ZPAD); sendline(ZPAD); sendline(ZDLE); sendline(ZHEX);
zputhex(type);
Crc32t = 0;
crc = updcrc(type, 0);
for (n=4; --n >= 0; ++hdr) {
zputhex(*hdr); crc = updcrc((0377 & *hdr), crc);
}
crc = updcrc(0,updcrc(0,crc));
zputhex(crc>>8); zputhex(crc);
/* Make it printable on remote machine */
sendline(015); sendline(0212);
/*
* Uncork the remote in case a fake XOFF has stopped data flow
*/
if (type != ZFIN && type != ZACK)
sendline(021);
flushmo();
}
/*
* Send binary array buf of length length, with ending ZDLE sequence frameend
*/
static char *Zendnames[] = { "ZCRCE", "ZCRCG", "ZCRCQ", "ZCRCW"};
zsdata(buf, length, frameend)
register char *buf;
{
register unsigned short crc;
vfile("zsdata: %d %s", length, Zendnames[frameend-ZCRCE&3]);
if (Crc32t)
zsda32(buf, length, frameend);
else {
crc = 0;
for (;--length >= 0; ++buf) {
zsendline(*buf); crc = updcrc((0377 & *buf), crc);
}
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();
}
}
zsda32(buf, length, frameend)
register char *buf;
{
register int c;
register UNSL long crc;
crc = 0xFFFFFFFFL;
for (;--length >= 0; ++buf) {
c = *buf & 0377;
if (c & 0140)
xsendline(lastsent = c);
else
zsendline(c);
crc = UPDC32(c, crc);
}
xsendline(ZDLE); xsendline(frameend);
crc = UPDC32(frameend, crc);
crc = ~crc;
for (length=4; --length >= 0;) {
zsendline((int)crc); crc >>= 8;
}
}
/*
* Receive array buf of max length with ending ZDLE sequence
* and CRC. Returns the ending character or error code.
* NB: On errors may store length+1 bytes!
*/
zrdata(buf, length)
register char *buf;
{
register int c;
register unsigned short crc;
register char *end;
register int d;
if (Rxframeind == ZBIN32)
return zrdat32(buf, length);
crc = Rxcount = 0; end = buf + length;
while (buf <= end) {
if ((c = zdlread()) & ~0377) {
crcfoo:
switch (c) {
case GOTCRCE:
case GOTCRCG:
case GOTCRCQ:
case GOTCRCW:
crc = updcrc((d=c)&0377, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = updcrc(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = updcrc(c, crc);
if (crc & 0xFFFF) {
zperr(badcrc);
return ERROR;
}
Rxcount = length - (end - buf);
vfile("zrdata: %d %s", Rxcount,
Zendnames[d-GOTCRCE&3]);
return d;
case GOTCAN:
zperr("Sender Canceled");
return ZCAN;
case TIMEOUT:
zperr("TIMEOUT");
return c;
default:
zperr("Bad data subpacket");
return c;
}
}
*buf++ = c;
crc = updcrc(c, crc);
}
zperr("Data subpacket too long");
return ERROR;
}
zrdat32(buf, length)
register char *buf;
{
register int c;
register UNSL long crc;
register char *end;
register int d;
crc = 0xFFFFFFFFL; Rxcount = 0; end = buf + length;
while (buf <= end) {
if ((c = zdlread()) & ~0377) {
crcfoo:
switch (c) {
case GOTCRCE:
case GOTCRCG:
case GOTCRCQ:
case GOTCRCW:
d = c; c &= 0377;
crc = UPDC32(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = UPDC32(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = UPDC32(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = UPDC32(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = UPDC32(c, crc);
if (crc != 0xDEBB20E3) {
zperr(badcrc);
return ERROR;
}
Rxcount = length - (end - buf);
vfile("zrdat32: %d %s", Rxcount,
Zendnames[d-GOTCRCE&3]);
return d;
case GOTCAN:
zperr("Sender Canceled");
return ZCAN;
case TIMEOUT:
zperr("TIMEOUT");
return c;
default:
zperr("Bad data subpacket");
return c;
}
}
*buf++ = c;
crc = UPDC32(c, crc);
}
zperr("Data subpacket too long");
return ERROR;
}
/*
* Read a ZMODEM header to hdr, either binary or hex.
* eflag controls local display of non zmodem characters:
* 0: no display
* 1: display printing characters only
* 2: display all non ZMODEM characters
* On success, set Zmodem to 1, set Rxpos and return type of header.
* Otherwise return negative on error.
* Return ERROR instantly if ZCRCW sequence, for fast error recovery.
*/
zgethdr(hdr, eflag)
char *hdr;
{
register int c, n, cancount;
n = Zrwindow + Baudrate; /* Max bytes before start of frame */
Rxframeind = Rxtype = 0;
startover:
cancount = 5;
again:
/* Return immediate ERROR if ZCRCW sequence seen */
switch (c = readline(Rxtimeout)) {
case RCDO:
case TIMEOUT:
goto fifi;
case CAN:
gotcan:
if (--cancount <= 0) {
c = ZCAN; goto fifi;
}
switch (c = readline(1)) {
case TIMEOUT:
goto again;
case ZCRCW:
c = ERROR;
/* **** FALL THRU TO **** */
case RCDO:
goto fifi;
default:
break;
case CAN:
if (--cancount <= 0) {
c = ZCAN; goto fifi;
}
goto again;
}
/* **** FALL THRU TO **** */
default:
agn2:
if ( --n == 0) {
zperr("Garbage count exceeded");
return(ERROR);
}
if (eflag && ((c &= 0177) & 0140))
bttyout(c);
else if (eflag > 1)
bttyout(c);
#ifdef UNIX
fflush(stderr);
#endif
goto startover;
case ZPAD|0200: /* This is what we want. */
Not8bit = c;
case ZPAD: /* This is what we want. */
break;
}
cancount = 5;
splat:
switch (c = noxrd7()) {
case ZPAD:
goto splat;
case RCDO:
case TIMEOUT:
goto fifi;
default:
goto agn2;
case ZDLE: /* This is what we want. */
break;
}
switch (c = noxrd7()) {
case RCDO:
case TIMEOUT:
goto fifi;
case ZBIN:
Rxframeind = ZBIN; Crc32 = FALSE;
c = zrbhdr(hdr);
break;
case ZBIN32:
Crc32 = Rxframeind = ZBIN32;
c = zrbhdr32(hdr);
break;
case ZHEX:
Rxframeind = ZHEX; Crc32 = FALSE;
c = zrhhdr(hdr);
break;
case CAN:
goto gotcan;
default:
goto agn2;
}
Rxpos = hdr[ZP3] & 0377;
Rxpos = (Rxpos<<8) + (hdr[ZP2] & 0377);
Rxpos = (Rxpos<<8) + (hdr[ZP1] & 0377);
Rxpos = (Rxpos<<8) + (hdr[ZP0] & 0377);
fifi:
switch (c) {
case GOTCAN:
c = ZCAN;
/* **** FALL THRU TO **** */
case ZNAK:
case ZCAN:
case ERROR:
case TIMEOUT:
case RCDO:
zperr("Got %s", frametypes[c+FTOFFSET]);
/* **** FALL THRU TO **** */
default:
if (c >= -3 && c <= FRTYPES)
vfile("zgethdr: %s %lx", frametypes[c+FTOFFSET], Rxpos);
else
vfile("zgethdr: %d %lx", c, Rxpos);
}
return c;
}
/* Receive a binary style header (type and position) */
zrbhdr(hdr)
register char *hdr;
{
register int c, n;
register unsigned short crc;
if ((c = zdlread()) & ~0377)
return c;
Rxtype = c;
crc = updcrc(c, 0);
for (n=4; --n >= 0; ++hdr) {
if ((c = zdlread()) & ~0377)
return c;
crc = updcrc(c, crc);
*hdr = c;
}
if ((c = zdlread()) & ~0377)
return c;
crc = updcrc(c, crc);
if ((c = zdlread()) & ~0377)
return c;
crc = updcrc(c, crc);
if (crc & 0xFFFF) {
zperr(badcrc);
return ERROR;
}
#ifdef ZMODEM
Protocol = ZMODEM;
#endif
Zmodem = 1;
return Rxtype;
}
/* Receive a binary style header (type and position) with 32 bit FCS */
zrbhdr32(hdr)
register char *hdr;
{
register int c, n;
register UNSL long crc;
if ((c = zdlread()) & ~0377)
return c;
Rxtype = c;
crc = 0xFFFFFFFFL; crc = UPDC32(c, crc);
#ifdef DEBUGZ
vfile("zrbhdr32 c=%X crc=%lX", c, crc);
#endif
for (n=4; --n >= 0; ++hdr) {
if ((c = zdlread()) & ~0377)
return c;
crc = UPDC32(c, crc);
*hdr = c;
#ifdef DEBUGZ
vfile("zrbhdr32 c=%X crc=%lX", c, crc);
#endif
}
for (n=4; --n >= 0;) {
if ((c = zdlread()) & ~0377)
return c;
crc = UPDC32(c, crc);
#ifdef DEBUGZ
vfile("zrbhdr32 c=%X crc=%lX", c, crc);
#endif
}
if (crc != 0xDEBB20E3) {
zperr(badcrc);
return ERROR;
}
#ifdef ZMODEM
Protocol = ZMODEM;
#endif
Zmodem = 1;
return Rxtype;
}
/* Receive a hex style header (type and position) */
zrhhdr(hdr)
char *hdr;
{
register int c;
register unsigned short crc;
register int n;
if ((c = zgethex()) < 0)
return c;
Rxtype = c;
crc = updcrc(c, 0);
for (n=4; --n >= 0; ++hdr) {
if ((c = zgethex()) < 0)
return c;
crc = updcrc(c, crc);
*hdr = c;
}
if ((c = zgethex()) < 0)
return c;
crc = updcrc(c, crc);
if ((c = zgethex()) < 0)
return c;
crc = updcrc(c, crc);
if (crc & 0xFFFF) {
zperr(badcrc); return ERROR;
}
switch ( c = readline(1)) {
case 0215:
Not8bit = c;
/* **** FALL THRU TO **** */
case 015:
/* Throw away possible cr/lf */
switch (c = readline(1)) {
case 012:
Not8bit |= c;
}
}
#ifdef ZMODEM
Protocol = ZMODEM;
#endif
Zmodem = 1; return Rxtype;
}
/* Send a byte as two hex digits */
zputhex(c)
register int c;
{
static char digits[] = "0123456789abcdef";
if (Verbose>8)
vfile("zputhex: %02X", c);
sendline(digits[(c&0xF0)>>4]);
sendline(digits[(c)&0xF]);
}
/*
* Send character c with ZMODEM escape sequence encoding.
* Escape XON, XOFF. Escape CR following @ (Telenet net escape)
*/
zsendline(c)
{
/* Quick check for non control characters */
if (c & 0140)
xsendline(lastsent = c);
else {
switch (c &= 0377) {
case ZDLE:
xsendline(ZDLE);
xsendline (lastsent = (c ^= 0100));
break;
case 015:
case 0215:
if (!Zctlesc && (lastsent & 0177) != '@')
goto sendit;
/* **** FALL THRU TO **** */
case 020:
case 021:
case 023:
case 0220:
case 0221:
case 0223:
xsendline(ZDLE);
c ^= 0100;
sendit:
xsendline(lastsent = c);
break;
default:
if (Zctlesc && ! (c & 0140)) {
xsendline(ZDLE);
c ^= 0100;
}
xsendline(lastsent = c);
}
}
}
/* Decode two lower case hex digits into an 8 bit byte value */
zgethex()
{
register int c;
c = zgeth1();
if (Verbose>8)
vfile("zgethex: %02X", c);
return c;
}
zgeth1()
{
register int c, n;
if ((c = noxrd7()) < 0)
return c;
n = c - '0';
if (n > 9)
n -= ('a' - ':');
if (n & ~0xF)
return ERROR;
if ((c = noxrd7()) < 0)
return c;
c -= '0';
if (c > 9)
c -= ('a' - ':');
if (c & ~0xF)
return ERROR;
c += (n<<4);
return c;
}
/*
* Read a byte, checking for ZMODEM escape encoding
* including CAN*5 which represents a quick abort
*/
zdlread()
{
register int c;
again:
/* Quick check for non control characters */
if ((c = readline(Rxtimeout)) & 0140)
return c;
switch (c) {
case ZDLE:
break;
case 023:
case 0223:
case 021:
case 0221:
goto again;
default:
if (Zctlesc && !(c & 0140)) {
goto again;
}
return c;
}
again2:
if ((c = readline(Rxtimeout)) < 0)
return c;
if (c == CAN && (c = readline(Rxtimeout)) < 0)
return c;
if (c == CAN && (c = readline(Rxtimeout)) < 0)
return c;
if (c == CAN && (c = readline(Rxtimeout)) < 0)
return c;
switch (c) {
case CAN:
return GOTCAN;
case ZCRCE:
case ZCRCG:
case ZCRCQ:
case ZCRCW:
return (c | GOTOR);
case ZRUB0:
return 0177;
case ZRUB1:
return 0377;
case 023:
case 0223:
case 021:
case 0221:
goto again2;
default:
if (Zctlesc && ! (c & 0140)) {
goto again2;
}
if ((c & 0140) == 0100)
return (c ^ 0100);
break;
}
if (Verbose>1)
zperr("Bad escape sequence %x", c);
return ERROR;
}
/*
* Read a character from the modem line with timeout.
* Eat parity, XON and XOFF characters.
*/
noxrd7()
{
register int c;
for (;;) {
if ((c = readline(Rxtimeout)) < 0)
return c;
switch (c &= 0177) {
case XON:
case XOFF:
continue;
default:
if (Zctlesc && !(c & 0140))
continue;
case '\r':
case '\n':
case ZDLE:
return c;
}
}
}
/* Store long integer pos in Txhdr */
stohdr(pos)
long pos;
{
Txhdr[ZP0] = pos;
Txhdr[ZP1] = pos>>8;
Txhdr[ZP2] = pos>>16;
Txhdr[ZP3] = pos>>24;
}
/* Recover a long integer from a header */
long
rclhdr(hdr)
register char *hdr;
{
register long l;
l = (hdr[ZP3] & 0377);
l = (l << 8) | (hdr[ZP2] & 0377);
l = (l << 8) | (hdr[ZP1] & 0377);
l = (l << 8) | (hdr[ZP0] & 0377);
return l;
}
/* End of zm.c */

123
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/zmodem.h Normal file
View File

@@ -0,0 +1,123 @@
/*
* Z M O D E M . H Manifest constants for ZMODEM
* application to application file transfer protocol
* 05-23-87 Chuck Forsberg Omen Technology Inc
*/
#define ZPAD '*' /* 052 Padding character begins frames */
#define ZDLE 030 /* Ctrl-X Zmodem escape - `ala BISYNC DLE */
#define ZDLEE (ZDLE^0100) /* Escaped ZDLE as transmitted */
#define ZBIN 'A' /* Binary frame indicator */
#define ZHEX 'B' /* HEX frame indicator */
#define ZBIN32 'C' /* Binary frame with 32 bit FCS */
/* Frame types (see array "frametypes" in zm.c) */
#define ZRQINIT 0 /* Request receive init */
#define ZRINIT 1 /* Receive init */
#define ZSINIT 2 /* Send init sequence (optional) */
#define ZACK 3 /* ACK to above */
#define ZFILE 4 /* File name from sender */
#define ZSKIP 5 /* To sender: skip this file */
#define ZNAK 6 /* Last packet was garbled */
#define ZABORT 7 /* Abort batch transfers */
#define ZFIN 8 /* Finish session */
#define ZRPOS 9 /* Resume data trans at this position */
#define ZDATA 10 /* Data packet(s) follow */
#define ZEOF 11 /* End of file */
#define ZFERR 12 /* Fatal Read or Write error Detected */
#define ZCRC 13 /* Request for file CRC and response */
#define ZCHALLENGE 14 /* Receiver's Challenge */
#define ZCOMPL 15 /* Request is complete */
#define ZCAN 16 /* Other end canned session with CAN*5 */
#define ZFREECNT 17 /* Request for free bytes on filesystem */
#define ZCOMMAND 18 /* Command from sending program */
#define ZSTDERR 19 /* Output to standard error, data follows */
/* ZDLE sequences */
#define ZCRCE 'h' /* CRC next, frame ends, header packet follows */
#define ZCRCG 'i' /* CRC next, frame continues nonstop */
#define ZCRCQ 'j' /* CRC next, frame continues, ZACK expected */
#define ZCRCW 'k' /* CRC next, ZACK expected, end of frame */
#define ZRUB0 'l' /* Translate to rubout 0177 */
#define ZRUB1 'm' /* Translate to rubout 0377 */
/* zdlread return values (internal) */
/* -1 is general error, -2 is timeout */
#define GOTOR 0400
#define GOTCRCE (ZCRCE|GOTOR) /* ZDLE-ZCRCE received */
#define GOTCRCG (ZCRCG|GOTOR) /* ZDLE-ZCRCG received */
#define GOTCRCQ (ZCRCQ|GOTOR) /* ZDLE-ZCRCQ received */
#define GOTCRCW (ZCRCW|GOTOR) /* ZDLE-ZCRCW received */
#define GOTCAN (GOTOR|030) /* CAN*5 seen */
/* Byte positions within header array */
#define ZF0 3 /* First flags byte */
#define ZF1 2
#define ZF2 1
#define ZF3 0
#define ZP0 0 /* Low order 8 bits of position */
#define ZP1 1
#define ZP2 2
#define ZP3 3 /* High order 8 bits of file position */
/* Bit Masks for ZRINIT flags byte ZF0 */
#define CANFDX 01 /* Rx can send and receive true FDX */
#define CANOVIO 02 /* Rx can receive data during disk I/O */
#define CANBRK 04 /* Rx can send a break signal */
#define CANCRY 010 /* Receiver can decrypt */
#define CANLZW 020 /* Receiver can uncompress */
#define CANFC32 040 /* Receiver can use 32 bit Frame Check */
#define ESCCTL 0100 /* Receiver expects ctl chars to be escaped */
#define ESC8 0200 /* Receiver expects 8th bit to be escaped */
/* Parameters for ZSINIT frame */
#define ZATTNLEN 32 /* Max length of attention string */
/* Bit Masks for ZSINIT flags byte ZF0 */
#define TESCCTL 0100 /* Transmitter expects ctl chars to be escaped */
#define TESC8 0200 /* Transmitter expects 8th bit to be escaped */
/* Parameters for ZFILE frame */
/* Conversion options one of these in ZF0 */
#define ZCBIN 1 /* Binary transfer - inhibit conversion */
#define ZCNL 2 /* Convert NL to local end of line convention */
#define ZCRESUM 3 /* Resume interrupted file transfer */
/* Management include options, one of these ored in ZF1 */
#define ZMSKNOLOC 0200 /* Skip file if not present at rx */
/* Management options, one of these ored in ZF1 */
#define ZMMASK 037 /* Mask for the choices below */
#define ZMNEWL 1 /* Transfer if source newer or longer */
#define ZMCRC 2 /* Transfer if different file CRC or length */
#define ZMAPND 3 /* Append contents to existing file (if any) */
#define ZMCLOB 4 /* Replace existing file */
#define ZMNEW 5 /* Transfer if source newer */
/* Number 5 is alive ... */
#define ZMDIFF 6 /* Transfer if dates or lengths different */
#define ZMPROT 7 /* Protect destination file */
/* Transport options, one of these in ZF2 */
#define ZTLZW 1 /* Lempel-Ziv compression */
#define ZTCRYPT 2 /* Encryption */
#define ZTRLE 3 /* Run Length encoding */
/* Extended options for ZF3, bit encoded */
#define ZXSPARS 64 /* Encoding for sparse file operations */
/* Parameters for ZCOMMAND frame ZF0 (otherwise 0) */
#define ZCACK1 1 /* Acknowledge, then do command */
long rclhdr();
/* Globals used by ZMODEM functions */
extern Rxframeind; /* ZBIN ZBIN32, or ZHEX type of frame received */
extern Rxtype; /* Type of header received */
extern Rxcount; /* Count of data bytes received */
extern Zrwindow; /* RX window size (controls garbage count) */
extern Rxtimeout; /* Tenths of seconds to wait for something */
extern char Rxhdr[4]; /* Received header */
extern char Txhdr[4]; /* Transmitted header */
extern long Rxpos; /* Received file position */
extern long Txpos; /* Transmitted file position */
extern Txfcs32; /* TURE means send binary frames with 32 bit FCS */
extern Crc32t; /* Display flag indicating 32 bit CRC being sent */
extern Crc32; /* Display flag indicating 32 bit CRC being received */
extern Znulls; /* Number of nulls to send at beginning of ZDATA hdr */
extern char Attn[ZATTNLEN+1]; /* Attention string rx sends to tx on err */
/* End of ZMODEM.H */