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KERMIT.C
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1993-07-30
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#define EXTRADEBUG
/*
* K e r m i t File Transfer Utility seriously hacked for local use with uw
*
* Currently allows only one kermit session to exist in one window concurent.
*
* Adapted from UNIX Kermit, Columbia University, 1981, 1982, 1983
* Bill Catchings, Bob Cattani, Chris Maio, Frank da Cruz, Alan Crosswell
*
* Also: Jim Guyton, Rand Corporation
* Walter Underwood, Ford Aerospace
*
*/
/*
* March 28, 1988
* Hacked into form usable in uw. Converted fsm's to be driven
* by received packet events. Rewrote rpack routine.
*/
#ifdef __GNUC__
# include <gemfast.h>
# include <aesbind.h>
# include <vdibind.h>
#else
# include <obdefs.h>
# include <gemdefs.h>
#endif
#include <osbind.h>
#include <stdio.h> /* Standard UNIX definitions */
#include <time.h>
#include "wind.h"
#include "windefs.h"
#define error printmsg
#define chari int /* items of type chari should be char, but, mwc
insists on adjusting them to int anyway */
/* Symbol Definitions */
#define MAXPACKSIZ 94 /* Maximum packet size */
#define SOH 1 /* Start of header */
#define CR 13 /* ASCII Carriage Return */
#define SP 32 /* ASCII space */
#define DEL 127 /* Delete (rubout) */
#define MAXTRY 10 /* Times to retry a packet */
#define MYQUOTE '#' /* Quote character I will use */
#define MYPAD 0 /* Number of padding characters I will need */
#define MYPCHAR 0 /* Padding character I need (NULL) */
#define MYEOL '\r' /* End-Of-Line character I need */
#define MYTIME 10 /* Seconds after which I should be timed out */
#define MAXTIM 60 /* Maximum timeout interval */
#define MINTIM 10 /* Minumum timeout interval */
#ifndef TRUE
#define TRUE -1 /* Boolean constants */
#endif
#define FALSE 0
#define GETPACK 2 /* return constant */
/* Macro Definitions */
/*
* f l u s h i n p u t
*
* Dump all pending input to clear stacked up NACK's.
*/
#define flushinput() /* no explicit call to flush needed for uw */
/*
* tochar: converts a control character to a printable one by adding a space.
*
* unchar: undoes tochar.
*
* ctl: converts between control characters and printable characters by
* toggling the control bit (ie. ^A becomes A and A becomes ^A).
*/
#define tochar(ch) ((ch) + ' ')
#define unchar(ch) ((ch) - ' ')
#define ctl(ch) ((ch) ^ 64 )
#define abs(exp) (((exp) >= 0) ? (exp) : -(exp))
/* Global Variables */
extern int mouse; /* is mouse visible ? */
extern struct wi_str w[];
int size, /* Size of present data */
rpsiz, /* Maximum receive packet size */
spsiz, /* Maximum send packet size */
pad, /* How much padding to send */
reqtimint, /* timeout interval I request */
timint, /* Timeout for foreign host on sends */
n, /* Packet number */
numtry, /* Times this packet retried */
oldtry, /* Times previous packet retried */
image, /* -1 means 8-bit mode */
debug, /* indicates level of debugging output (0=none) */
filnamcnv, /* -1 means do file name case conversions */
filecount, /* Number of files left to send */
kermwdes, /* Window descripter for kermit window */
kermport; /* port number for kermit window */
clock_t timestamp; /* Time last packet was received */
char sflg, rflg; /* flags for RECEIVE, SEND */
char state, /* Present state of the automaton */
padchar, /* Padding character to send */
eol, /* End-Of-Line character to send */
quote, /* Quote character in incoming data */
**filelist, /* List of files to be sent */
*filnam, /* Current file name */
recpkt[MAXPACKSIZ+1], /* Receive packet buffer */
packet[MAXPACKSIZ+1]; /* Packet buffer */
FILE *fp, /* File pointer for current disk file */
*log; /* File pointer for Logfile */
/*
* kerminit
*
* initalization routine - initalize and dispatch to the appropriate routine.
*/
int kerminit(curwin)
int curwin;
{
OBJECT *obj_tmp;
static char path[40] = ".\\*.*";
static char file[40] = "";
static char filename[80]; /* space for file and directory */
int butt;
/* Initialize these values and hope the first packet will get across OK */
if (kermwdes && w[kermwdes].kerm_act) return (-1);
kermwdes = curwin;
/* If kermit already active, return. */
w[kermwdes].kerm_act = TRUE; /* mark current window to send output
to kermit instead of emulator */
kermport = find_port(curwin);
eol = CR; /* EOL for outgoing packets */
quote = '#'; /* Standard control-quote char "#" */
pad = 0; /* No padding */
padchar = '\0'; /* Use null if any padding wanted */
timint = MYTIME; /* default timint */
/*
* Set direction and paramaters debug, filnamcnv, image with dialog
*/
rsrc_gaddr(R_TREE, KERMPARM, &obj_tmp);
if (obj_tmp[ASCIIMOD].ob_state == NORMAL &&
obj_tmp[IMAGEMOD].ob_state == NORMAL)
{ /* initalize object and statics */
objc_change(obj_tmp, ASCIIMOD, 0, 0, 0, 0, 0, SELECTED, 0);
objc_change(obj_tmp, CONVNAME, 0, 0, 0, 0, 0, SELECTED, 0);
objc_change(obj_tmp, RECFILE, 0, 0, 0, 0, 0, SELECTED, 0);
path[0] = Dgetdrv() + 'a';
path[1] = ':';
Dgetpath(path+2, 0);
strcat(path, "\\*.*");
}
if ((butt = s_dial(KERMPARM, 3)) == KERMEXIT) return(kermterm());
if (obj_tmp[DEBUGENA].ob_state == SELECTED)
{
debug = obj_tmp[DEBUG1].ob_state + obj_tmp[DEBUG2].ob_state
+ obj_tmp[DEBUG3].ob_state;
}
if (butt == RECFILE) obj_tmp[RECFILE].ob_state = SELECTED;
if (butt == SENDFILE) obj_tmp[SENDFILE].ob_state = SELECTED;
rflg = obj_tmp[RECFILE].ob_state;
sflg = obj_tmp[SENDFILE].ob_state;
image = (obj_tmp[IMAGEMOD].ob_state == SELECTED);
filnamcnv = obj_tmp[CONVNAME].ob_state; /* conversion for UNIX systems */
/* All set up, now execute the command that was given. */
if (debug)
{
printmsg("debuging level = %d\n",debug);
if (sflg) printmsg("Send command\n");
if (rflg) printmsg("Receive command\n");
}
if (sflg) /* Send command */
{
extern char * rindex();
if (!mouse)
{
graf_mouse(M_ON, NULL);
++mouse;
}
fsel_input(path, file, &butt);
if (! butt) return(kermterm());
strcpy(filename, path);
if (debug > 2) printmsg("directory %s", filename);
filnam = rindex(filename, '\\');
if (filnam) *(++filnam) = '\0';
strcat(filename, file);
filnam = filename; /* Get file to send */
if (debug > 2) printmsg("sending %s",filnam);
fp = NULL; /* Indicate no file open yet */
filelist = NULL; /* Set up the rest of the file list */
filecount = 0; /* Number of files left to send */
state = 'S'; /* Send initiate is the start state */
n = 0; /* Initialize message number */
numtry = 0; /* Say no tries yet */
w[kermwdes].kerm_act = TRUE; /* mark current window to send output
to kermit instead of emulator */
timestamp = clock(); /* reset timer */
sendsw();
}
if (rflg) /* Receive command */
{
state = 'R'; /* Receive-Init is the start state */
n = 0; /* Initialize message number */
numtry = 0; /* Say no tries yet */
timestamp = clock(); /* reset timer */
}
return(0);
}
/*
* kermterm - Terminate kermit and tell uw not to call us again.
*/
kermterm()
{
sflg = rflg = 0;
w[kermwdes].kerm_act = FALSE;
kermwdes = 0;
}
kermtimchk()
{
if (!w[kermwdes].kerm_act) /* is kermit active? */
{
kermwdes = 0;
return;
}
if ((clock() - timestamp) / CLK_TCK > timint) /* timeout ? */
{
rpack(NULL, "", ""); /* tell FSM about time out */
}
}
/*
* s e n d s w
*
* Sendsw is the state table switcher for sending files. It loops until
* either it finishes, or an error is encountered. The routines called
* by sendsw are responsible for changing the state.
*
*/
int sendsw()
{
chari sinit(), sfile(), sdata(), seof(), sbreak(), nstate;
nstate = state;
while(TRUE) /* Do this as long as necessary */
{
if (debug) printmsg("sendsw state: %c nstate: %c\n",state,nstate);
while (nstate != 'I')
{
switch(nstate)
{
case 'S': nstate = sinit(); break; /* Send-Init */
case 'F': nstate = sfile(); break; /* Send-File */
case 'D': nstate = sdata(); break; /* Send-Data */
case 'Z': nstate = seof(); break; /* Send-End-of-File */
case 'B': nstate = sbreak(); break; /* Send-Break */
}
switch(nstate)
{
case 'C': printmsg("\aDone.\a");
return (TRUE); /* Complete */
case 'A': printmsg("Send Failed.");
return (FALSE); /* "Abort" */
}
if (nstate != 'I')
{
state = nstate;
if (numtry++ > MAXTRY) return(FALSE); /* If too many tries, give up */
}
}
return(GETPACK);
}
}
/*
* s i n i t
*
* Send Initiate: send this host's parameters and get other side's back.
*/
chari sinit()
{
int num, len; /* Packet number, length */
static int sent = 0;
if (! sent) {
reqtimint = MYTIME;
spar(packet); /* Fill up init info packet */
flushinput(); /* Flush pending input */
spack('S',n,6,packet); /* Send an S packet */
sent = 1;
return('I'); /* get packet to read */
}
sent = 0;
switch(rpack(&len,&num,recpkt)) /* What was the reply? */
{
case 'N': return(state); /* NAK, try it again */
case 'Y': /* ACK */
if (n != num) /* If wrong ACK, stay in S state */
return(state); /* and try again */
rpar(recpkt); /* Get other side's init info */
if (eol == 0) eol = '\n'; /* Check and set defaults */
if (quote == 0) quote = '#';
if(abs(timint - reqtimint) < 3) timint = reqtimint + 3;
/* guarentee diference of > 3 for sounds for timint */
numtry = 0; /* Reset try counter */
n = (n+1)%64; /* Bump packet count */
return('F'); /* OK, switch state to F */
case 'E': /* Error packet received */
prerrpkt(recpkt); /* Print it out and */
return('A'); /* abort */
case FALSE: return(state); /* Receive failure, try again */
default: return('A'); /* Anything else, just "abort" */
}
}
/*
* s f i l e
*
* Send File Header.
*/
chari sfile()
{
int num, len; /* Packet number, length */
char filnam1[50], /* Converted file name */
*newfilnam, /* Pointer to file name to send */
*cp; /* char pointer */
static int sent = 0;
if (! sent) {
if (fp == NULL) /* If not already open, */
{ if (debug) printmsg(" Opening %s for sending.\n",filnam);
fp = fopen(filnam, image ? "rb" : "r"); /* open the file to be sent */
if (fp == NULL) /* If bad file pointer, give up */
{
error("Cannot open file %s",filnam);
return('A');
}
}
strcpy(filnam1, filnam); /* Copy file name */
newfilnam = cp = filnam1;
while (*cp != '\0') /* Strip off all leading directory */
if (*cp++ == '\\') /* names (ie. up to the last /). */
newfilnam = cp;
if (filnamcnv) /* Convert lower case to upper */
for (cp = newfilnam; *cp != '\0'; cp++)
if (*cp >= 'a' && *cp <= 'z')
*cp ^= 040;
len = cp - newfilnam; /* Compute length of new filename */
printmsg("Sending %s as %s",filnam,newfilnam);
spack('F',n,len,newfilnam); /* Send an F packet */
sent = 1;
return('I'); /* get packet to read */
}
sent = 0;
switch(rpack(&len,&num,recpkt)) /* What was the reply? */
{
case 'N': /* NAK, just stay in this state, */
num = (--num<0 ? 63:num); /* unless it's NAK for next packet */
if (n != num) /* which is just like an ACK for */
return(state); /* this packet so fall thru to... */
case 'Y': /* ACK */
if (n != num) return(state); /* If wrong ACK, stay in F state */
numtry = 0; /* Reset try counter */
n = (n+1)%64; /* Bump packet count */
size = bufill(packet); /* Get first data from file */
return('D'); /* Switch state to D */
case 'E': /* Error packet received */
prerrpkt(recpkt); /* Print it out and */
return('A'); /* abort */
case FALSE: return(state); /* Receive failure, stay in F state */
default: return('A'); /* Something else, just "abort" */
}
}
/*
* s d a t a
*
* Send File Data
*/
chari sdata()
{
int num, len; /* Packet number, length */
static int sent = 0;
if (! sent) {
spack('D',n,size,packet); /* Send a D packet */
sent = 1;
return('I'); /* get packet to read */
}
sent = 0;
switch(rpack(&len,&num,recpkt)) /* What was the reply? */
{
case 'N': /* NAK, just stay in this state, */
num = (--num<0 ? 63:num); /* unless it's NAK for next packet */
if (n != num) /* which is just like an ACK for */
return(state); /* this packet so fall thru to... */
case 'Y': /* ACK */
if (n != num) return(state); /* If wrong ACK, fail */
numtry = 0; /* Reset try counter */
n = (n+1)%64; /* Bump packet count */
if ((size = bufill(packet)) == EOF) /* Get data from file */
return('Z'); /* If EOF set state to that */
return('D'); /* Got data, stay in state D */
case 'E': /* Error packet received */
prerrpkt(recpkt); /* Print it out and */
return('A'); /* abort */
case FALSE: return(state); /* Receive failure, stay in D */
default: return('A'); /* Anything else, "abort" */
}
}
/*
* s e o f
*
* Send End-Of-File.
*/
chari seof()
{
int num, len; /* Packet number, length */
static int sent = 0;
if (! sent) {
spack('Z',n,0,packet); /* Send a 'Z' packet */
sent = 1;
return('I'); /* get packet to read */
}
sent = 0;
switch(rpack(&len,&num,recpkt)) /* What was the reply? */
{
case 'N': /* NAK, just stay in this state, */
num = (--num<0 ? 63:num); /* unless it's NAK for next packet, */
if (n != num) /* which is just like an ACK for */
return(state); /* this packet so fall thru to... */
case 'Y': /* ACK */
if (n != num) return(state); /* If wrong ACK, hold out */
numtry = 0; /* Reset try counter */
n = (n+1)%64; /* and bump packet count */
if (debug) printmsg(" Closing input file %s, ",filnam);
fclose(fp); /* Close the input file */
fp = NULL; /* Set flag indicating no file open */
if (debug) printmsg("looking for next file...\n");
if (gnxtfl() == FALSE) /* No more files go? */
return('B'); /* if not, break, EOT, all done */
if (debug) printmsg(" New file is %s\n",filnam);
return('F'); /* More files, switch state to F */
case 'E': /* Error packet received */
prerrpkt(recpkt); /* Print it out and */
return('A'); /* abort */
case FALSE: return(state); /* Receive failure, stay in Z */
default: return('A'); /* Something else, "abort" */
}
}
/*
* s b r e a k
*
* Send Break (EOT)
*/
chari sbreak()
{
int num, len; /* Packet number, length */
static int sent = 0;
if (! sent) {
spack('B',n,0,packet); /* Send a B packet */
sent = 1;
return('I'); /* get packet to read */
}
sent = 0;
switch (rpack(&len,&num,recpkt)) /* What was the reply? */
{
case 'N': /* NAK, just stay in this state, */
num = (--num<0 ? 63:num); /* unless NAK for previous packet, */
if (n != num) /* which is just like an ACK for */
return(state); /* this packet so fall thru to... */
case 'Y': /* ACK */
if (n != num) return(state); /* If wrong ACK, fail */
numtry = 0; /* Reset try counter */
n = (n+1)%64; /* and bump packet count */
return('C'); /* Switch state to Complete */
case 'E': /* Error packet received */
prerrpkt(recpkt); /* Print it out and */
return('A'); /* abort */
case FALSE: return(state); /* Receive failure, stay in B */
default: return ('A'); /* Other, "abort" */
}
}
/*
* r e c s w
*
* This is the state table switcher for receiving files.
*/
recsw()
{
chari rinit(), rfile(), rdata(); /* Use these procedures */
if (debug) printmsg(" recsw state: %c\n",state);
switch(state) /* Do until done */
{
case 'R': state = rinit(); break; /* Receive-Init */
case 'F': state = rfile(); break; /* Receive-File */
case 'D': state = rdata(); break; /* Receive-Data */
}
if (numtry++ > MAXTRY) return(FALSE); /* If too many tries, give up */
switch(state) /* Do until done */
{
case 'C': printmsg("\aDone.\a");
return(TRUE); /* Complete state */
case 'A': printmsg("Receive Failed.");
return(FALSE); /* "Abort" state */
}
return(GETPACK); /* get the next packet */
}
/*
* r i n i t
*
* Receive Initialization
*/
chari rinit()
{
int len, num; /* Packet length, number */
switch(rpack(&len,&num,packet)) /* Get a packet */
{
case 'S': /* Send-Init */
rpar(packet); /* Get the other side's init data */
if (timint > MYTIME + 3) reqtimint = timint - 4;
else reqtimint = timint + 4;
spar(packet); /* Fill up packet with my init info */
flushinput(); /* get rid of unwanted nak's */
spack('Y',n,6,packet); /* ACK with my parameters */
oldtry = numtry; /* Save old try count */
numtry = 0; /* Start a new counter */
n = (n+1)%64; /* Bump packet number, mod 64 */
return('F'); /* Enter File-Receive state */
case 'E': /* Error packet received */
prerrpkt(recpkt); /* Print it out and */
return('A'); /* abort */
case FALSE: /* Didn't get packet */
spack('N',n,0,NULL); /* Return a NAK */
return(state); /* Keep trying */
default: return('A'); /* Some other packet type, "abort" */
}
}
/*
* r f i l e
*
* Receive File Header
*/
chari rfile()
{
int num, len; /* Packet number, length */
char filnam1[50]; /* Holds the converted file name */
switch(rpack(&len,&num,packet)) /* Get a packet */
{
case 'S': /* Send-Init, maybe our ACK lost */
if (oldtry++ > MAXTRY) return('A'); /* If too many tries "abort" */
if (num == ((n==0) ? 63:n-1)) /* Previous packet, mod 64? */
{ /* Yes, ACK it again with */
spar(packet); /* our Send-Init parameters */
spack('Y',num,6,packet);
numtry = 0; /* Reset try counter */
return(state); /* Stay in this state */
}
else return('A'); /* Not previous packet, "abort" */
case 'Z': /* End-Of-File */
if (oldtry++ > MAXTRY) return('A');
if (num == ((n==0) ? 63:n-1)) /* Previous packet, mod 64? */
{ /* Yes, ACK it again. */
spack('Y',num,0,NULL);
numtry = 0;
return(state); /* Stay in this state */
}
else return('A'); /* Not previous packet, "abort" */
case 'F': /* File Header (just what we want) */
if (num != n) return('A'); /* The packet number must be right */
strcpy(filnam1, packet); /* Copy the file name */
if (filnamcnv) /* Convert upper case to lower */
for (filnam=filnam1; *filnam != '\0'; filnam++)
if (*filnam >= 'A' && *filnam <= 'Z')
*filnam |= 040;
if ((fp=fopen(filnam1, image ? "wb" : "w"))==NULL) /* Try to open a new file */
{
error("Cannot create %s",filnam1); /* Give up if can't */
return('A');
}
else /* OK, give message */
printmsg("Receiving %s as %s",packet,filnam1);
spack('Y',n,0,NULL); /* Acknowledge the file header */
oldtry = numtry; /* Reset try counters */
numtry = 0; /* ... */
n = (n+1)%64; /* Bump packet number, mod 64 */
return('D'); /* Switch to Data state */
case 'B': /* Break transmission (EOT) */
if (num != n) return ('A'); /* Need right packet number here */
spack('Y',n,0,NULL); /* Say OK */
return('C'); /* Go to complete state */
case 'E': /* Error packet received */
prerrpkt(recpkt); /* Print it out and */
return('A'); /* abort */
case FALSE: /* Didn't get packet */
spack('N',n,0,NULL); /* Return a NAK */
return(state); /* Keep trying */
default: return ('A'); /* Some other packet, "abort" */
}
}
/*
* r d a t a
*
* Receive Data
*/
chari rdata()
{
int num, len; /* Packet number, length */
switch(rpack(&len,&num,packet)) /* Get packet */
{
case 'D': /* Got Data packet */
#ifdef EXTRADEBUG
if (debug > 2) printmsg("Got Data Packet");
#endif
if (num != n) /* Right packet? */
{ /* No */
if (oldtry++ > MAXTRY)
return('A'); /* If too many tries, abort */
if (num == ((n==0) ? 63:n-1)) /* Else check packet number */
{ /* Previous packet again? */
spack('Y',num,6,packet); /* Yes, re-ACK it */
numtry = 0; /* Reset try counter */
return(state); /* Don't write out data! */
}
else return('A'); /* sorry, wrong number */
}
/* Got data with right packet number */
spack('Y',n,0,NULL); /* Acknowledge the packet */
#ifdef EXTRADEBUG
if (debug > 2) printmsg("Calling bufemp");
#endif
bufemp(packet,len); /* Write the data to the file */
oldtry = numtry; /* Reset the try counters */
numtry = 0; /* ... */
n = (n+1)%64; /* Bump packet number, mod 64 */
return('D'); /* Remain in data state */
case 'F': /* Got a File Header */
if (oldtry++ > MAXTRY)
return('A'); /* If too many tries, "abort" */
if (num == ((n==0) ? 63:n-1)) /* Else check packet number */
{ /* It was the previous one */
spack('Y',num,0,NULL); /* ACK it again */
numtry = 0; /* Reset try counter */
return(state); /* Stay in Data state */
}
else return('A'); /* Not previous packet, "abort" */
case 'Z': /* End-Of-File */
if (num != n) return('A'); /* Must have right packet number */
spack('Y',n,0,NULL); /* OK, ACK it. */
fclose(fp); /* Close the file */
n = (n+1)%64; /* Bump packet number */
return('F'); /* Go back to Receive File state */
case 'E': /* Error packet received */
prerrpkt(recpkt); /* Print it out and */
return('A'); /* abort */
case FALSE: /* Didn't get packet */
spack('N',n,0,NULL); /* Return a NAK */
return(state); /* Keep trying */
default: return('A'); /* Some other packet, "abort" */
}
}
/*
* KERMIT utilities.
*/
/*
* s p a c k
*
* Send a Packet
*/
spack(type,num,len,data)
chari type;
char *data;
int num, len;
{
int i; /* Character loop counter */
char chksum, buffer[100]; /* Checksum, packet buffer */
register char *bufp; /* Buffer pointer */
if (debug>1) /* Display outgoing packet */
{
printmsg(" spack type: %c\n",type);
printmsg(" num: %d\n",num);
printmsg(" len: %d\n",len);
if (data != NULL)
{
data[len] = '\0'; /* Null-terminate data to print it */
printmsg(" data: \"%s\"\n",data);
}
}
bufp = buffer; /* Set up buffer pointer */
for (i=1; i<=pad; i++) proto_out(kermport,&padchar,1); /* Issue any padding */
*bufp++ = SOH; /* Packet marker, ASCII 1 (SOH) */
*bufp++ = tochar(len+3); /* Send the character count */
chksum = tochar(len+3); /* Initialize the checksum */
*bufp++ = tochar(num); /* Packet number */
chksum += tochar(num); /* Update checksum */
*bufp++ = type; /* Packet type */
chksum += type; /* Update checksum */
for (i=0; i<len; i++) /* Loop for all data characters */
{
*bufp++ = data[i]; /* Get a character */
chksum += data[i]; /* Update checksum */
}
chksum = (((chksum&0300) >> 6)+chksum)&077; /* Compute final checksum */
*bufp++ = tochar(chksum); /* Put it in the packet */
*bufp = eol; /* Extra-packet line terminator */
proto_out(kermport, buffer, bufp-buffer+1);
/* Send the packet */
#ifdef EXTRADEBUG
if (debug > 2) printmsg("Returning from spack");
#endif
}
/*
* r p a c k
*
* Read a Packet
* This routine is called both to buffer data from the host to the kermit
* window and to retreive those buffers once they contain a packet. This
* routine calls the kermit state machine when it has a complete packet.
* The kermit state machine in turn calls this routine to retreive the packet.
* Thus, this routine is indirectly recursive to two levels. Receive timeouts
* and bad packets cause FALSE to be returned to the state machine. The uw
* control loop calls us with num == NULL to pass us a string of data from
* the host. The uw control loop calls us with len == NULL if the timout
* counter (kerm_time) exceeds timint without us reseting it.
*/
#ifdef EXTRADEBUG
#define getnext {t = *dptr++; \
if (debug>2) printmsg( "char %d state %c", t, recstate);\
if ((t & 0177) == SOH) { \
recstate = 'L'; /* restart packet collection */\
break; } \
if (!image) t &= 0177; /* Handle parity */ \
if (t == 0) break; /* end of this input buffer */ }
#else
#define getnext {t = *dptr++; \
if ((t & 0177) == SOH) { \
recstate = 'L'; /* restart packet collection */\
break; } \
if (!image) t &= 0177; /* Handle parity */ \
if (t == 0) break; /* end of this input buffer */ }
#endif
rpack(len,num,data)
int *len, *num; /* Packet length, number */
char *data; /* Packet data */
{
static int i; /* Data character number */
static int leng; /* length of data packet in buffer */
static char type; /* packet type */
static int numb; /* number of data packet in buffer */
static int timedout = 0; /* did we time out? */
char t; /* Current input character */
static char cchksum, /* Our (computed) checksum */
rchksum; /* Checksum received from other host */
char *dptr; /* pointer to next data byte */
static char mybuf[MAXPACKSIZ]; /* buffer used to acumulate packet */
static char recstate = 'S'; /* start with S state */
if (len == NULL) { /* timed out */
timedout = TRUE;
if (sflg)
{
if (sendsw() != GETPACK) /* Send the file(s) */
return(kermterm());
}
else if (rflg)
{
if (recsw() != GETPACK) /* Receive the file(s) */
return(kermterm());
}
return (0);
}
if (len != NULL && num != NULL) /* received packet or timed out */
{
*len = leng;
*num = numb;
timestamp = clock(); /* reset timer */
if (timedout)
{
printmsg("Timeout.");
timedout = 0;
return(FALSE);
}
for (i=0; i<leng; i++)
data[i] = mybuf[i];
if (data != NULL)
data[*len] = '\0'; /* Null-terminate data to print it */
if (debug>1) /* Display incoming packet */
{
printmsg(" rpack type: %c\n",type);
printmsg(" num: %d\n",*num);
printmsg(" len: %d\n",*len);
if (data != NULL)
printmsg(" data: \"%s\"\n",data);
}
/* Fold in bits 7,8 to compute */
cchksum = (((cchksum&0300) >> 6)+cchksum)&077; /* final checksum */
if (cchksum != rchksum) return(FALSE);
return(type); /* All OK, return packet type */
}
/* num == NULL so collect data for kermit */
dptr = data;
t = -1;
while (t)
{
switch(recstate)
{
case 'S':
while (1) /* Wait for packet header */
getnext;
break;
case 'L': /* get packet length */
getnext; /* get next character */
cchksum = t; /* Start the checksum */
leng = unchar(t)-3; /* Character count */
if (leng > MAXPACKSIZ)
leng = MAXPACKSIZ;
i = 0;
recstate = 'N';
/* Fall Through */
case 'N': /* get packet number */
getnext
cchksum = cchksum + t; /* Update checksum */
numb = unchar(t); /* Packet number */
recstate = 'T';
/* Fall Through */
case 'T': /* get packet type */
getnext;
cchksum = cchksum + t; /* Update checksum */
type = t; /* Packet type */
recstate = 'D';
/* Fall Through */
case 'D': /* get packet data */
for (; i<leng; i++) /* The data itself, if any */
{ /* Loop for character count */
getnext;
cchksum = cchksum + t; /* Update checksum */
mybuf[i] = t; /* Put it in the data buffer */
}
if (i == leng)
recstate = 'C';
break;
case 'C':
mybuf[leng] = 0; /* Mark the end of the data */
getnext;
rchksum = unchar(t); /* Convert to numeric */
recstate = 'E'; /* Done with packet receipt */
t = 0; /* Dispose of remaining data */
}
}
if (recstate == 'E') {
recstate = 'S';
if (sflg)
{
if (sendsw() != GETPACK) /* Send the file(s) */
return(kermterm());
}
else if (rflg)
{
if (recsw() != GETPACK) /* Receive the file(s) */
return(kermterm());
}
}
return(0);
}
/*
* b u f i l l
*
* Get a bufferful of data from the file that's being sent.
* Only control-quoting is done; 8-bit & repeat count prefixes are
* not handled.
*/
bufill(buffer)
char buffer[]; /* Buffer */
{
int i, /* Loop index */
t; /* Char read from file */
char t7; /* 7-bit version of above */
i = 0; /* Init data buffer pointer */
while((t = getc(fp)) != EOF) /* Get the next character */
{
t7 = t & 0177; /* Get low order 7 bits */
if (t7 < SP || t7==DEL || t7==quote) /* Does this char require */
{ /* special handling? */
if (t=='\n' && !image)
{ /* Do LF->CRLF mapping if !image */
buffer[i++] = quote;
buffer[i++] = ctl('\r');
}
buffer[i++] = quote; /* Quote the character */
if (t7 != quote)
{
t = ctl(t); /* and uncontrolify */
t7 = ctl(t7);
}
}
if (image)
buffer[i++] = t; /* Deposit the character itself */
else
buffer[i++] = t7;
if (i >= spsiz-8) return(i); /* Check length */
}
if (i==0) return(EOF); /* Wind up here only on EOF */
return(i); /* Handle partial buffer */
}
/*
* b u f e m p
*
* Put data from an incoming packet into a file.
*/
bufemp(buffer,len)
char buffer[]; /* Buffer */
int len; /* Length */
{
int i; /* Counter */
char t; /* Character holder */
#ifdef EXTRADEBUG
if (debug > 2) printmsg("Entered bufemp");
#endif
for (i=0; i<len; i++) /* Loop thru the data field */
{
t = buffer[i]; /* Get character */
if (t == MYQUOTE) /* Control quote? */
{ /* Yes */
t = buffer[++i]; /* Get the quoted character */
if ((t & 0177) != MYQUOTE) /* Low order bits match quote char? */
t = ctl(t); /* No, uncontrollify it */
}
if (t==CR && !image) /* Don't pass CR if not in image mode */
continue;
#ifdef EXTRADEBUG
if (debug > 2) printmsg("writing t=%c", t);
#endif
putc(t,fp);
}
}
/*
* g n x t f l
*
* Get next file in a file group
*/
gnxtfl()
{
if (filecount-- == 0) return FALSE; /* If no more, fail */
if (debug) printmsg(" gnxtfl: filelist = \"%s\"\n",*filelist);
filnam = *(filelist++);
return TRUE; /* else succeed */
}
/*
* s p a r
*
* Fill the data array with my send-init parameters
*
*/
spar(data)
char data[];
{
data[0] = tochar(MAXPACKSIZ); /* Biggest packet I can receive */
data[1] = tochar(reqtimint); /* When I want to be timed out */
data[2] = tochar(MYPAD); /* How much padding I need */
data[3] = ctl(MYPCHAR); /* Padding character I want */
data[4] = tochar(MYEOL); /* End-Of-Line character I want */
data[5] = MYQUOTE; /* Control-Quote character I send */
}
/* r p a r
*
* Get the other host's send-init parameters
*
*/
rpar(data)
char data[];
{
spsiz = unchar(data[0]); /* Maximum send packet size */
timint = unchar(data[1]); /* When I should time out */
if (timint > MAXTIM) timint = MAXTIM;
if (timint < MINTIM) timint = MINTIM;
pad = unchar(data[2]); /* Number of pads to send */
padchar = ctl(data[3]); /* Padding character to send */
eol = unchar(data[4]); /* EOL character I must send */
quote = data[5]; /* Incoming data quote character */
}
/*
* Kermit printing routines:
*
* printmsg - like printf with "Kermit: " prepended
* prerrpkt - print contents of error packet received from remote host
*/
/*
* p r i n t m s g
*
* Print message kermit window
*/
/*VARARGS1*/
printmsg(fmt, a1, a2, a3, a4, a5)
char *fmt;
{
char *sbuf[100];
w_output(kermwdes,"Kermit: ");
sprintf(sbuf,fmt,a1,a2,a3,a4,a5);
w_output(kermwdes,sbuf);
w_output(kermwdes,"\n\r");
}
/*
* p r e r r p k t
*
* Print contents of error packet received from remote host.
*/
prerrpkt(msg)
char *msg;
{
printmsg("Kermit aborting with following error from remote host:\n%s",msg);
return;
}