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Added first part of zmodem sources

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This commit is contained in:
Michiel Broek 2004-11-07 13:21:59 +00:00
parent 4e180b5cd4
commit cb2d964597
6 changed files with 1237 additions and 1 deletions
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2
mbsebbs/Makefile
View File

@ -132,6 +132,6 @@ dispfile.o: ../config.h ../lib/mbselib.h ../lib/mbse.h ../lib/users.h ../lib/msg
userlist.o: ../config.h ../lib/mbselib.h ../lib/mbse.h ../lib/users.h userlist.h language.h input.h timeout.h term.h ttyio.h
timestats.o: ../config.h ../lib/mbselib.h ../lib/mbse.h ../lib/users.h timestats.h funcs.h language.h input.h exitinfo.h term.h
logentry.o: ../config.h ../lib/mbselib.h ../lib/mbse.h ../lib/users.h logentry.h
zmrle.o: ../config.h ../lib/mbselib.h ../lib/nodelist.h ttyio.h zmodem.h zmrle.h
zmrle.o: ../config.h ../lib/mbselib.h ../lib/nodelist.h ttyio.h zmodem.h zmrle.h zmmisc.h
zmmisc.o: ../config.h ../lib/mbselib.h ../lib/nodelist.h ttyio.h zmodem.h zmrle.h zmmisc.h
# End of generated dependencies

995
mbsebbs/zmmisc.c Normal file
View File

@ -0,0 +1,995 @@
/*
* $Id$
*
* Z M . C
* Copyright 1994 Omen Technology Inc All Rights Reserved
* ZMODEM protocol primitives
*
* Entry point Functions:
* zsbhdr(type, hdr) send binary header
* zshhdr(type, hdr) send hex header
* zgethdr(hdr) 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
*
*
* This version implements numerous enhancements including ZMODEM
* Run Length Encoding and variable length headers. These
* features were not funded by the original Telenet development
* contract.
*
* This software may be freely used for educational (didactic
* only) purposes. This software may also be freely used to
* support file transfer operations to or from licensed Omen
* Technology products. Use with other commercial or shareware
* programs (Crosstalk, Procomm, etc.) REQUIRES REGISTRATION.
*
* Any programs which use part or all of this software must be
* provided in source form with this notice intact except by
* written permission from Omen Technology Incorporated.
*
* Use of this software for commercial or administrative purposes
* except when exclusively limited to interfacing Omen Technology
* products requires a per port license payment of $20.00 US per
* port (less in quantity). Use of this code by inclusion,
* decompilation, reverse engineering or any other means
* constitutes agreement to these conditions and acceptance of
* liability to license the materials and payment of reasonable
* legal costs necessary to enforce this license agreement.
*
*
* Omen Technology Inc
* Post Office Box 4681
* Portland OR 97208
*
* This code is made available in the hope it will be useful,
* BUT WITHOUT ANY WARRANTY OF ANY KIND OR LIABILITY FOR ANY
* DAMAGES OF ANY KIND.
*
*/
static void zputhex(int);
static void zsbh32(int,char*,int,int);
static void zsda32(char*,int,int);
static int zrdat32(char*,int);
static int noxrd7(void);
static int zrbhd32(char*);
static int zrbhdr(char*);
static int zrhhdr(char*);
static int zgethex(void);
static int zgeth1(void);
static void garbitch(void);
#include "../config.h"
#include "../lib/mbselib.h"
#include "../lib/nodelist.h"
#include "ttyio.h"
#include "zmodem.h"
#include "zmrle.h"
#include "zmmisc.h"
/* Original zm.c timing was in tenths of seconds, but our current ttyio driver
does timing in whole seconds.
*/
static int Rxtimeout = 10; /* Seconds to wait for something */
int Zctlesc;
/* Globals used by ZMODEM functions */
int Rxframeind; /* ZBIN ZBIN32, or ZHEX type of frame */
int Rxtype; /* Type of header received */
int Rxhlen; /* Length of header received */
int Rxcount; /* Count of data bytes received */
char Rxhdr[ZMAXHLEN]; /* Received header */
char Txhdr[ZMAXHLEN]; /* Transmitted header */
long Rxpos; /* Received file position */
long Txpos; /* Transmitted file position */
int Txfcs32; /* TRUE means send binary frames with 32 bit FCS */
int Crc32t; /* Controls 32 bit CRC being sent */
/* 1 == CRC32, 2 == CRC32 + RLE */
int Crc32r; /* Indicates/controls 32 bit CRC being received */
/* 0 == CRC16, 1 == CRC32, 2 == CRC32 + RLE */
int Usevhdrs; /* Use variable length headers */
int Znulls; /* Number of nulls to send at beginning of ZDATA hdr */
char Attn[ZATTNLEN+1]; /* Attention string rx sends to tx on err */
char *Altcan; /* Alternate canit string */
char *txbuf=NULL;
char *rxbuf=NULL;
static int lastsent; /* Last char we sent */
static int Not8bit; /* Seven bits seen on header */
char *frametypes[] = {
(char *)"EMPTY", /* -16 */
(char *)"Can't be (-15)",
(char *)"Can't be (-14)",
(char *)"Can't be (-13)",
(char *)"Can't be (-12)",
(char *)"Can't be (-11)",
(char *)"Can't be (-10)",
(char *)"Can't be (-9)",
(char *)"HANGUP", /* -8 */
(char *)"Can't be (-7)",
(char *)"Can't be (-6)",
(char *)"Can't be (-5)",
(char *)"EOFILE", /* -4 */
(char *)"Can't be (-3)",
(char *)"TIMEOUT", /* -2 */
(char *)"ERROR", /* -1 */
(char *)"ZRQINIT",
(char *)"ZRINIT",
(char *)"ZSINIT",
(char *)"ZACK",
(char *)"ZFILE",
(char *)"ZSKIP",
(char *)"ZNAK",
(char *)"ZABORT",
(char *)"ZFIN",
(char *)"ZRPOS",
(char *)"ZDATA",
(char *)"ZEOF",
(char *)"ZFERR",
(char *)"ZCRC",
(char *)"ZCHALLENGE",
(char *)"ZCOMPL",
(char *)"ZCAN",
(char *)"ZFREECNT",
(char *)"ZCOMMAND",
(char *)"ZSTDERR",
(char *)"xxxxx"
#define FRTYPES 22 /* Total number of frame types in this array */
/* not including psuedo negative entries */
};
/***** Hack by mj ***********************************************************/
/*
* Buffer for outgoing frames. Sending them with single character write()'s
* is a waste of processor time and causes severe performance degradation
* on TCP and ISDN connections.
*/
#define FRAME_BUFFER_SIZE 16384
static char *frame_buffer=NULL;
static int frame_length = 0;
#define BUFFER_CLEAR() do { frame_length=0; } while(0)
#define BUFFER_BYTE(c) do { frame_buffer[frame_length++]=(c); } while(0)
#define BUFFER_FLUSH() do { PUT(frame_buffer, frame_length); \
frame_length=0; } while(0);
/****************************************************************************/
void get_frame_buffer(void)
{
if (frame_buffer == NULL)
frame_buffer = malloc(FRAME_BUFFER_SIZE);
}
void free_frame_buffer(void)
{
if (frame_buffer)
free(frame_buffer);
frame_buffer = NULL;
}
/*
* Send ZMODEM binary header hdr of type type
*/
void zsbhdr(int len, int type, register char *shdr)
{
register int n;
register unsigned short crc;
Syslog('z', "zsbhdr: %c %d %s %lx", Usevhdrs?'v':'f', len, frametypes[type+FTOFFSET], rclhdr(shdr));
BUFFER_CLEAR();
if (type == ZDATA)
for (n = Znulls; --n >=0; )
BUFFER_BYTE(0);
BUFFER_BYTE(ZPAD); BUFFER_BYTE(ZDLE);
switch (Crc32t=Txfcs32) {
case 2:
zsbh32(len, shdr, type, Usevhdrs?ZVBINR32:ZBINR32);
BUFFER_FLUSH(); break;
case 1:
zsbh32(len, shdr, type, Usevhdrs?ZVBIN32:ZBIN32); break;
default:
if (Usevhdrs) {
BUFFER_BYTE(ZVBIN);
zsendline(len);
}
else
BUFFER_BYTE(ZBIN);
zsendline(type);
crc = updcrc16(type, 0);
for (n=len; --n >= 0; ++shdr) {
zsendline(*shdr);
crc = updcrc16((0377& *shdr), crc);
}
crc = updcrc16(0,updcrc16(0,crc));
zsendline(((int)(crc>>8)));
zsendline(crc);
}
BUFFER_FLUSH();
}
/*
* Send ZMODEM binary header hdr of type type
*/
void zsbh32(int len, register char *shdr, int type, int flavour)
{
register int n;
register unsigned long crc;
BUFFER_BYTE(flavour);
if (Usevhdrs)
zsendline(len);
zsendline(type);
crc = 0xFFFFFFFFL; crc = updcrc32(type, crc);
for (n=len; --n >= 0; ++shdr) {
crc = updcrc32((0377 & *shdr), crc);
zsendline(*shdr);
}
crc = ~crc;
for (n=4; --n >= 0;) {
zsendline((int)crc);
crc >>= 8;
}
}
/*
* Send ZMODEM HEX header hdr of type type
*/
void zshhdr(int len, int type, register char *shdr)
{
register int n;
register unsigned short crc;
Syslog('z', "zshhdr: %c %d %s %ld", Usevhdrs?'v':'f', len, frametypes[type+FTOFFSET], rclhdr(shdr));
BUFFER_CLEAR();
BUFFER_BYTE(ZPAD);
BUFFER_BYTE(ZPAD);
BUFFER_BYTE(ZDLE);
if (Usevhdrs) {
BUFFER_BYTE(ZVHEX);
zputhex(len);
}
else
BUFFER_BYTE(ZHEX);
zputhex(type);
Crc32t = 0;
crc = updcrc16(type, 0);
for (n=len; --n >= 0; ++shdr) {
zputhex(*shdr); crc = updcrc16((0377 & *shdr), crc);
}
crc = updcrc16(0,updcrc16(0,crc));
zputhex(((int)(crc>>8))); zputhex(crc);
/*
* Make it printable on remote machine
*/
BUFFER_BYTE(015);
BUFFER_BYTE(0212);
/*
* Uncork the remote in case a fake XOFF has stopped data flow
*/
if (type != ZFIN && type != ZACK)
BUFFER_BYTE(021);
BUFFER_FLUSH();
}
/*
* Send binary array buf of length length, with ending ZDLE sequence frameend
*/
char *Zendnames[] = {(char *)"ZCRCE",(char *)"ZCRCG",(char *)"ZCRCQ",(char *)"ZCRCW"};
void zsdata(register char *buf, int length, int frameend)
{
register unsigned short crc;
Syslog('z', "zsdata: %d %s", length, Zendnames[(frameend-ZCRCE)&3]);
BUFFER_CLEAR();
switch (Crc32t) {
case 1:
zsda32(buf, length, frameend); break;
case 2:
zsdar32(buf, length, frameend); break;
default:
crc = 0;
for (;--length >= 0; ++buf) {
zsendline(*buf); crc = updcrc16((0377 & *buf), crc);
}
BUFFER_BYTE(ZDLE); BUFFER_BYTE(frameend);
crc = updcrc16(frameend, crc);
crc = updcrc16(0,updcrc16(0,crc));
zsendline(((int)(crc>>8))); zsendline(crc);
}
if (frameend == ZCRCW)
BUFFER_BYTE(XON);
BUFFER_FLUSH();
}
void zsda32(register char *buf, int length, int frameend)
{
register int c;
register unsigned long crc;
crc = 0xFFFFFFFFL;
for (;--length >= 0; ++buf) {
c = *buf & 0377;
if (c & 0140)
BUFFER_BYTE(lastsent = c);
else
zsendline(c);
crc = updcrc32(c, crc);
}
BUFFER_BYTE(ZDLE);
BUFFER_BYTE(frameend);
crc = updcrc32(frameend, crc);
crc = ~crc;
for (c=4; --c >= 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!
*/
int zrdata(register char *buf, int length)
{
register int c;
register unsigned short crc;
register char *end;
register int d;
switch (Crc32r) {
case 1:
return zrdat32(buf, length);
case 2:
return zrdatr32(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 = updcrc16((((d=c))&0377), crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = updcrc16(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = updcrc16(c, crc);
if (crc & 0xFFFF) {
Syslog('+', "Zmodem zrdata: Bad CRC");
return TERROR;
}
Rxcount = length - (end - buf);
Syslog('z', "zrdata: %d %s", Rxcount, Zendnames[(d-GOTCRCE)&3]);
return d;
case GOTCAN:
Syslog('+', "Zmodem: Sender Canceled");
return ZCAN;
case TIMEOUT:
Syslog('+', "Zmodem: TIMEOUT receiving data");
return c;
case HANGUP:
Syslog('+', "Zmodem: Carrier lost while receiving");
return c;
default:
garbitch();
return c;
}
}
*buf++ = c;
crc = updcrc16(c, crc);
}
Syslog('+', "Zmodem: Data subpacket too long");
return TERROR;
}
int zrdat32(register char *buf, int length)
{
register int c;
register unsigned 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 = updcrc32(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = updcrc32(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = updcrc32(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = updcrc32(c, crc);
if ((c = zdlread()) & ~0377)
goto crcfoo;
crc = updcrc32(c, crc);
if (crc != 0xDEBB20E3) {
Syslog('+', "Zmodem zrdat32: Bad CRC");
return TERROR;
}
Rxcount = length - (end - buf);
Syslog('z', "zrdat32: %d %s", Rxcount, Zendnames[(d-GOTCRCE)&3]);
return d;
case GOTCAN:
Syslog('+', "Zmodem: Sender Canceled");
return ZCAN;
case TIMEOUT:
Syslog('+', "Zmodem: TIMEOUT");
return c;
case HANGUP:
Syslog('+', "Zmodem: Carrier lost while receiving");
return c;
default:
garbitch();
return c;
}
}
*buf++ = c;
crc = updcrc32(c, crc);
}
Syslog('+', "Zmodem: Data subpacket too long");
return TERROR;
}
void garbitch(void)
{
Syslog('+', "Zmodem: Garbled data subpacket");
}
/*
* Read a ZMODEM header to hdr, either binary or hex.
*
* Set Rxhlen to size of header (default 4) (valid if good hdr)
* 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.
*/
int zgethdr(char *shdr)
{
register int c, n, cancount;
int Zrwindow = 1400;
int Baudrate = 9600;
n = Zrwindow + Baudrate;
Rxframeind = Rxtype = 0;
startover:
cancount = 5;
again:
/*
* Return immediate ERROR if ZCRCW sequence seen
*/
if (((c = GETCHAR(Rxtimeout)) < 0) && (c != TIMEOUT))
goto fifi;
else switch(c) {
case 021: case 0221:
goto again;
case HANGUP:
case TIMEOUT:
goto fifi;
case CAN:
gotcan:
if (--cancount <= 0) {
c = ZCAN; goto fifi;
}
switch (c = GETCHAR(Rxtimeout)) {
case TIMEOUT:
goto again;
case ZCRCW:
switch (GETCHAR(Rxtimeout)) {
case TIMEOUT:
c = TERROR; goto fifi;
case HANGUP:
goto fifi;
default:
goto agn2;
}
case HANGUP:
goto fifi;
default:
break;
case CAN:
if (--cancount <= 0) {
c = ZCAN; goto fifi;
}
goto again;
}
/* **** FALL THRU TO **** */
default:
agn2:
#define GCOUNT (-4)
if ( --n == 0) {
c = GCOUNT; goto fifi;
}
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 HANGUP:
case TIMEOUT:
goto fifi;
default:
goto agn2;
case ZDLE: /* This is what we want. */
break;
}
Rxhlen = 4; /* Set default length */
Rxframeind = c = noxrd7();
switch (c) {
case ZVBIN32:
if ((Rxhlen = c = zdlread()) < 0)
goto fifi;
if (c > ZMAXHLEN)
goto agn2;
Crc32r = 1; c = zrbhd32(shdr); break;
case ZBIN32:
if (Usevhdrs)
goto agn2;
Crc32r = 1; c = zrbhd32(shdr); break;
case ZVBINR32:
if ((Rxhlen = c = zdlread()) < 0)
goto fifi;
if (c > ZMAXHLEN)
goto agn2;
Crc32r = 2; c = zrbhd32(shdr); break;
case ZBINR32:
if (Usevhdrs)
goto agn2;
Crc32r = 2; c = zrbhd32(shdr); break;
case HANGUP:
case TIMEOUT:
goto fifi;
case ZVBIN:
if ((Rxhlen = c = zdlread()) < 0)
goto fifi;
if (c > ZMAXHLEN)
goto agn2;
Crc32r = 0; c = zrbhdr(shdr); break;
case ZBIN:
if (Usevhdrs)
goto agn2;
Crc32r = 0; c = zrbhdr(shdr); break;
case ZVHEX:
if ((Rxhlen = c = zgethex()) < 0)
goto fifi;
if (c > ZMAXHLEN)
goto agn2;
Crc32r = 0; c = zrhhdr(shdr); break;
case ZHEX:
if (Usevhdrs)
goto agn2;
Crc32r = 0; c = zrhhdr(shdr); break;
case CAN:
goto gotcan;
default:
goto agn2;
}
for (n = Rxhlen; ++n < ZMAXHLEN; ) /* Clear unused hdr bytes */
shdr[n] = 0;
Rxpos = shdr[ZP3] & 0377;
Rxpos = (Rxpos<<8) + (shdr[ZP2] & 0377);
Rxpos = (Rxpos<<8) + (shdr[ZP1] & 0377);
Rxpos = (Rxpos<<8) + (shdr[ZP0] & 0377);
fifi:
switch (c) {
case GOTCAN:
c = ZCAN;
/* **** FALL THRU TO **** */
case ZNAK:
case ZCAN:
case TERROR:
case TIMEOUT:
case HANGUP:
Syslog('+', "Zmodem: Got %s", frametypes[c+FTOFFSET]);
/* **** FALL THRU TO **** */
default:
if (c >= -FTOFFSET && c <= FRTYPES)
Syslog('z', "zgethdr: %c %d %s %ld", Rxframeind, Rxhlen, frametypes[c+FTOFFSET], Rxpos);
else
Syslog('z', "zgethdr: %c %d %ld", Rxframeind, c, Rxpos);
}
/* Use variable length headers if we got one */
if (c >= 0 && c <= FRTYPES && Rxframeind & 040)
Usevhdrs = 1;
return c;
}
/*
* Receive a binary style header (type and position)
*/
int zrbhdr(register char *shdr)
{
register int c, n;
register unsigned short crc;
if ((c = zdlread()) & ~0377)
return c;
Rxtype = c;
crc = updcrc16(c, 0);
for (n=Rxhlen; --n >= 0; ++shdr) {
if ((c = zdlread()) & ~0377)
return c;
crc = updcrc16(c, crc);
*shdr = c;
}
if ((c = zdlread()) & ~0377)
return c;
crc = updcrc16(c, crc);
if ((c = zdlread()) & ~0377)
return c;
crc = updcrc16(c, crc);
if (crc & 0xFFFF) {
Syslog('+', "Zmodem zrbhdr: Bad CRC");
return TERROR;
}
return Rxtype;
}
/*
* Receive a binary style header (type and position) with 32 bit FCS
*/
int zrbhd32(register char *shdr)
{
register int c, n;
register unsigned long crc;
if ((c = zdlread()) & ~0377)
return c;
Rxtype = c;
crc = 0xFFFFFFFFL; crc = updcrc32(c, crc);
for (n=Rxhlen; --n >= 0; ++shdr) {
if ((c = zdlread()) & ~0377)
return c;
crc = updcrc32(c, crc);
*shdr = c;
}
for (n=4; --n >= 0;) {
if ((c = zdlread()) & ~0377)
return c;
crc = updcrc32(c, crc);
}
if (crc != 0xDEBB20E3) {
Syslog('+', "Zmodem zrbhd32: Bad CRC");
return TERROR;
}
return Rxtype;
}
/*
* Receive a hex style header (type and position)
*/
int zrhhdr(char *shdr)
{
register int c;
register unsigned short crc;
register int n;
if ((c = zgethex()) < 0)
return c;
Rxtype = c;
crc = updcrc16(c, 0);
for (n=Rxhlen; --n >= 0; ++shdr) {
if ((c = zgethex()) < 0)
return c;
crc = updcrc16(c, crc);
*shdr = c;
}
if ((c = zgethex()) < 0)
return c;
crc = updcrc16(c, crc);
if ((c = zgethex()) < 0)
return c;
crc = updcrc16(c, crc);
if (crc & 0xFFFF) {
Syslog('+', "Zmodem zrhhdr: Bad CRC");
return TERROR;
}
switch (c = GETCHAR(Rxtimeout)) {
case 0215:
Not8bit = c;
/* **** FALL THRU TO **** */
case 015:
/* Throw away possible cr/lf */
switch (c = GETCHAR(Rxtimeout)) {
case 012:
Not8bit |= c;
}
}
if (c < 0)
return c;
return Rxtype;
}
/*
* Send a byte as two hex digits
*/
void zputhex(register int c)
{
static char digits[] = "0123456789abcdef";
BUFFER_BYTE(digits[(c&0xF0)>>4]);
BUFFER_BYTE(digits[(c)&0xF]);
}
/*
* Send character c with ZMODEM escape sequence encoding.
* Escape XON, XOFF. Escape CR following @ (Telenet net escape)
*/
void zsendline(int c)
{
/* Quick check for non control characters */
if (c & 0140)
BUFFER_BYTE(lastsent = c);
else {
switch (c &= 0377) {
case ZDLE:
BUFFER_BYTE(ZDLE);
BUFFER_BYTE (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:
BUFFER_BYTE(ZDLE);
c ^= 0100;
sendit:
BUFFER_BYTE(lastsent = c);
break;
default:
if (Zctlesc && ! (c & 0140)) {
BUFFER_BYTE(ZDLE);
c ^= 0100;
}
BUFFER_BYTE(lastsent = c);
}
}
}
/* Decode two lower case hex digits into an 8 bit byte value */
int zgethex(void)
{
register int c;
c = zgeth1();
return c;
}
int zgeth1(void)
{
register int c, n;
if ((c = noxrd7()) < 0)
return c;
n = c - '0';
if (n > 9)
n -= ('a' - ':');
if (n & ~0xF)
return TERROR;
if ((c = noxrd7()) < 0)
return c;
c -= '0';
if (c > 9)
c -= ('a' - ':');
if (c & ~0xF)
return TERROR;
c += (n<<4);
return c;
}
/*
* Read a byte, checking for ZMODEM escape encoding
* including CAN*5 which represents a quick abort
*/
int zdlread(void)
{
register int c;
again:
/* Quick check for non control characters */
if ((c = GETCHAR(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 = GETCHAR(Rxtimeout)) < 0)
return c;
if (c == CAN && (c = GETCHAR(Rxtimeout)) < 0)
return c;
if (c == CAN && (c = GETCHAR(Rxtimeout)) < 0)
return c;
if (c == CAN && (c = GETCHAR(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;
}
Syslog('+', "Zmodem: Bad escape sequence 0x%x", c);
return TERROR;
}
/*
* Read a character from the modem line with timeout.
* Eat parity, XON and XOFF characters.
*/
int noxrd7(void)
{
register int c;
for (;;) {
if ((c = GETCHAR(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
*/
void stohdr(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(register char *shdr)
{
register long l;
l = (shdr[ZP3] & 0377);
l = (l << 8) | (shdr[ZP2] & 0377);
l = (l << 8) | (shdr[ZP1] & 0377);
l = (l << 8) | (shdr[ZP0] & 0377);
return l;
}
/* End of zmmisc.c */

30
mbsebbs/zmmisc.h Normal file
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#ifndef _ZMMISC_H
#define _ZMMISC_H
/* $Id$ */
void get_frame_buffer(void);
void free_frame_buffer(void);
void zsbhdr(int, int, register char *);
void zsbh32(int, register char *, int, int);
void zshhdr(int, int, register char *);
void zsdata(register char *, int, int);
void zsda32(register char *, int, int);
int zrdata(register char *, int);
int zrdat32(register char *, int);
void garbitch(void);
int zgethdr(char *);
int zrbhdr(register char *);
int zrbhd32(register char *);
int zrhhdr(char *);
void zputhex(register int);
void zsendline(int);
int zgethex(void);
int zgeth1(void);
int zdlread(void);
int noxrd7(void);
void stohdr(long);
long rclhdr(register char *);
#endif

201
mbsebbs/zmodem.h Normal file
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@ -0,0 +1,201 @@
#ifndef ZMODEM_H
#define ZMODEM_H
/* $Id$ */
#ifndef TRUE
#define TRUE 1
#endif
#ifndef OK
#define OK 0
#endif
#ifndef FALSE
#define FALSE 0
#endif
#define RETRYMAX 10
#define MAXBLOCK 8192
/*
* Z M O D E M . H Manifest constants for ZMODEM
* application to application file transfer protocol
* 04-17-89 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 (CRC-16) */
#define ZHEX 'B' /* HEX frame indicator */
#define ZBIN32 'C' /* Binary frame with 32 bit FCS */
#define ZBINR32 'D' /* RLE packed Binary frame with 32 bit FCS */
#define ZVBIN 'a' /* Binary frame indicator (CRC-16) */
#define ZVHEX 'b' /* HEX frame indicator */
#define ZVBIN32 'c' /* Binary frame with 32 bit FCS */
#define ZVBINR32 'd' /* RLE packed Binary frame with 32 bit FCS */
#define ZRESC 0176 /* RLE flag/escape character */
#define ZMAXHLEN 16 /* Max header information length NEVER CHANGE */
#define ZMAXSPLEN 1024 /* Max subpacket length NEVER CHANGE */
/* 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 */
/* Parameters for ZRINIT header */
#define ZRPXWN 8 /* 9th byte in header contains window size/256 */
#define ZRPXQQ 9 /* 10th to 14th bytes contain quote mask */
/* 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 CANRLE 010 /* Receiver can decode RLE */
#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 */
/* Bit Masks for ZRINIT flags byte ZF1 */
#define CANVHDR 01 /* Variable headers OK */
#define ZRRQWN 8 /* Receiver specified window size in ZRPXWN */
#define ZRRQQQ 16 /* Additional control chars to quote in ZRPXQQ */
#define ZRQNVH (ZRRQWN|ZRRQQQ) /* Variable len hdr reqd to access info */
/* Parameters for ZSINIT frame */
#define ZATTNLEN 32 /* Max length of attention string */
#define ALTCOFF ZF1 /* Offset to alternate canit string, 0 if not used */
/* 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 */
#define ZMCHNG 8 /* Change filename if destination exists */
/* Transport options, one of these in ZF2 */
#define ZTLZW 1 /* Lempel-Ziv compression */
#define ZTRLE 3 /* Run Length encoding */
/* Extended options for ZF3, bit encoded */
#define ZXSPARS 64 /* Encoding for sparse file operations */
#define ZCANVHDR 01 /* Variable headers OK */
/* Receiver window size override */
#define ZRWOVR 4 /* byte position for receive window override/256 */
/* Parameters for ZCOMMAND frame ZF0 (otherwise 0) */
#define ZCACK1 1 /* Acknowledge, then do command */
long rclhdr(register char *);
/* Globals used by ZMODEM functions */
extern int Rxframeind; /* ZBIN ZBIN32, or ZHEX type of frame */
extern int Rxtype; /* Type of header received */
extern int Rxcount; /* Count of data bytes received */
extern int long Rxpos; /* Received file position */
extern int long Txpos; /* Transmitted file position */
extern int Txfcs32; /* TURE means send binary frames with 32 bit FCS */
extern int Crc32t; /* Display flag indicating 32 bit CRC being sent */
extern int Crc32r; /* Display flag indicating 32 bit CRC being received */
extern int Crc32; /* Display flag indicating 32 bit CRC being received */
extern int Znulls; /* Number of nulls to send at beginning of ZDATA hdr */
extern char Rxhdr[];
extern char Txhdr[];
extern char Attn[ZATTNLEN+1]; /* Attention string rx sends to tx on err */
extern char *Altcan; /* Alternate canit string */
extern char *Zendnames[];
extern char *txbuf;
extern char *rxbuf;
/* End of ZMODEM.H */
char Zsendmask[33]; /* Additional control characters to mask */
extern int Effbaud;
extern int Zmodem;
extern int Zctlesc;
extern int Filesleft;
extern long Totalleft;
extern char *frametypes[];
#define FTOFFSET 16
//extern void zsbhdr(int,int,char*);
//extern void zshhdr(int,int,char*);
//extern int zgethdr(char*);
//extern void zsdata(char*,int,int);
//extern int zrdata(char*,int);
//extern void stohdr(long);
//extern void zsendline(int);
//extern void zsdar32(char*,int,int);
//extern int zrdatr32(char*,int);
//extern int zdlread(void);
extern unsigned short crc16xmodemtab[];
extern unsigned long crc32tab[];
#define updcrc16(cp,crc) (crc16xmodemtab[(((int)crc >> 8) & 0xff)] ^ (crc << 8) ^ cp)
#define updcrc32(cp,crc) (crc32tab[((int)crc ^ cp) & 0xff] ^ ((crc >> 8) & 0x00ffffff))
//int zmsndfiles(file_list *);
int zmrcvfiles(void);
#endif

1
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#include "ttyio.h"
#include "zmodem.h"
#include "zmrle.h"
#include "zmmisc.h"
/*

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mbsebbs/zmrle.h Normal file
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#ifndef _ZMRLE_H
#define _ZMRLE_H
/* $Id$ */
void zsdar32(char *, int, int);
int zrdatr32(register char *, int);
#endif