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/*+-------------------------------------------------------------------------
zcommon.c - tiprz/tipsz common code
derived from public domain code by Chuck Forsberg
tip adaptation by wht%n4hgf@emory.mathcs.emory.edu
Defined functions:
cancel_transaction(0)
get_curr_dir(currdir,currdir_max)
get_home_dir(home_dir)
getspeed(code)
mode(new_mode)
rdchk(f)
rdchk(f)
sendbrk()
zmputs(str)
--------------------------------------------------------------------------*/
/*+:EDITS:*/
/*:05-21-1990-16:00-wht@tridom-adapt ecu xfer protocols for tipwht */
#include <stdio.h>
#include <signal.h>
#include <setjmp.h>
#include <ctype.h>
#include <termios.h>
#include <pwd.h>
#include "zmodem.h"
extern unsigned char vmin_count;
extern int Zmodem;
extern unsigned Baudrate;
extern int Twostop; /* Use two stop bits */
#if defined(LLITOUT)
long Locmode; /* Saved "local mode" for 4.x BSD "new driver" */
long Locbit = LLITOUT; /* Bit SUPPOSED to disable output translations */
#endif
#ifndef HAYES
struct
{
unsigned baudr;
int speedcode;
} speeds[] =
{
110, B110,
300, B300,
600, B600,
1200, B1200,
2400, B2400,
4800, B4800,
9600, B9600,
19200, EXTA,
38400, EXTB,
0,
};
#endif
/* crctab calculated by Mark G. Mendel,Network Systems Corporation */
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
};
#if defined(WANT_UPDCRC_HERE) /* wht -- moved to zmodem.h */
/*
* 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)
#endif
/*
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 macro for using the table is UPDC32 is located in zmodem.h
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 "UPDC32" 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.
*/
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
};
#if defined(FIONREAD)
/*
* Return non 0 iff something to read from io descriptor f
*/
rdchk(f)
{
static long lf;
ioctl(f,FIONREAD,&lf);
return((int) lf);
}
#endif
#if defined(SV)
#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
#ifndef HAYES
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 */
}
#endif
struct sgttyb oldtty,tty;
struct tchars oldtch,tch;
extern int iofd; /* 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(new_mode)
{
static did0 = FALSE;
report_mode(new_mode);
switch(new_mode)
{
#if defined(M_SYS5)
case 2: /* Un-raw mode used by sz,sb when -g detected */
if(!did0)
(void) ioctl(iofd,TCGETA,&oldtty);
tty = oldtty;
tty.c_iflag &= ~(IXON | IXOFF | IXANY);
#if defined(RTSFLOW)
if(tty.c_cflag & (RTSFLOW | CTSFLOW))
tty.c_iflag = BRKINT;
else
tty.c_iflag = BRKINT|IXON;
#else
tty.c_iflag = BRKINT|IXON;
#endif
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 */
#if defined(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 */
#if defined(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 &= ~(IXON | IXOFF | IXANY);
#if defined(RTSFLOW)
tty.c_iflag = new_mode == 3 ? (IGNBRK | RTSFLOW) : IGNBRK;
#else
tty.c_iflag = new_mode == 3 ? (IGNBRK | IXOFF) : IGNBRK;
#endif
/* 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 */
#if defined(NFGVMIN)
tty.c_cc[VMIN] = 1; /* This many chars satisfies reads */
#else
tty.c_cc[VMIN] = vmin_count; /* 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;
#ifndef HAYES
Baudrate = getspeed(tty.c_cflag & CBAUD);
#endif
report_comm_baud_rate(Baudrate);
return(OK);
#endif
#if defined(pyr) || defined(NeXT)
/*
* 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 BSD4. 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)
{
ioctl(iofd,TIOCEXCL,0);
ioctl(iofd,TIOCGETP,&oldtty);
ioctl(iofd,TIOCGETC,&oldtch);
#if defined(LLITOUT)
ioctl(TIOCLGET,&Locmode); /* Get "local mode" */
#endif
}
tty = oldtty;
tch = oldtch;
#if defined(READCHECK)
tch.t_intrc = Zmodem ? -1:030; /* Interrupt char */
#else
tch.t_intrc = Zmodem ? 03:030; /* Interrupt char */
#endif
tty.sg_flags |= (ODDP|EVENP|CBREAK);
tty.sg_flags &= ~(ALLDELAY|CRMOD|ECHO|LCASE);
ioctl(iofd,TIOCSETP,&tty);
ioctl(iofd,TIOCSETC,&tch);
#if defined(LLITOUT)
ioctl(TIOCLBIS,&Locbit);
#endif
/* un-raw doesn't work w/o lit out *//*wht code was 99 */
cancel_transaction(0);
did0 = TRUE;
return(OK);
case 1:
case 3:
if(!did0)
{
ioctl(iofd,TIOCEXCL,0);
ioctl(iofd,TIOCGETP,&oldtty);
ioctl(iofd,TIOCGETC,&oldtch);
#if defined(LLITOUT)
ioctl(TIOCLGET,&Locmode); /* Get "local mode" */
#endif
}
tty = oldtty;
tty.sg_flags |= RAW;
tty.sg_flags &= ~ECHO;
ioctl(iofd,TIOCSETP,&tty);
did0 = TRUE;
#ifndef HAYES
Baudrate = getspeed(tty.sg_ospeed);
#endif
report_comm_baud_rate(Baudrate);
return(OK);
#endif
case 0:
if(!did0)
return(ERROR);
#if defined(M_SYS5)
(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
#if defined(pyr) || defined(NeXT)
ioctl(iofd,TIOCSETP,&oldtty);
ioctl(iofd,TIOCSETC,&oldtch);
ioctl(iofd,TIOCNXCL,0);
#if defined(LLITOUT)
ioctl(TIOCLSET,&Locmode); /* Restore "local mode" */
#endif
#endif
return(OK);
default:
return(ERROR);
}
}
/*+-------------------------------------------------------------------------
sendbrk()
--------------------------------------------------------------------------*/
sendbrk()
{
#if defined(pyr) || defined(NeXT)
sleep(1);
ioctl(iofd,TIOCSBRK,0);
sleep(1);
ioctl(iofd,TIOCCBRK,0);
#endif
#if defined(M_SYS5)
ioctl(iofd,TCSBRK,0);
#endif
} /* end of sendbrk */
/*+-------------------------------------------------------------------------
get_curr_dir(currdir,currdir_max)
--------------------------------------------------------------------------*/
void
get_curr_dir(currdir,currdir_max)
char *currdir;
int currdir_max;
{
#if defined(pyr) || defined(NeXT)
getwd(currdir);
#endif
#if defined(M_SYS5)
getcwd(currdir,currdir_max);
#endif
} /* end of get_curr_dir */
/*+-------------------------------------------------------------------------
zmputs(str) - send a string to the modem
processing for \336 (sleep 1 sec) and \335 (break signal)
--------------------------------------------------------------------------*/
zmputs(str)
register char *str;
{
register char strch;
while(strch = *str++)
{
switch(strch)
{
case '\336':
sleep(1);
continue;
case '\335':
sendbrk();
continue;
default:
sendline(strch);
}
}
} /* end of zmputs */
/*+-----------------------------------------------------------------------
get_home_dir(home_dir): leave plenty of room for result!
------------------------------------------------------------------------*/
get_home_dir(home_dir)
char *home_dir;
{
static char home_directory[256] = "";
struct passwd *pwent;
struct passwd *getpwuid();
if(home_directory[0])
{
strcpy(home_dir,home_directory);
return(0);
}
if(!(pwent = getpwuid(getuid())))
{
perror("cannot get pwent for you!!");
exit(1);
}
strcpy(home_directory,pwent->pw_dir);
strcpy(home_dir,pwent->pw_dir);
endpwent();
return(0);
} /* end of get_home_dir */
/* end of zcommon.c */
/* vi: set tabstop=4 shiftwidth=4: */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.