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- /*
- * K e r m i t File Transfer Utility
- *
- * 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
- * Server Mode and Honeywell H66 & DPS8 added by
- * Terry Carlin, Honeywell inc.
- *
- *
- * For remote Kermit, format is either:
- * kermit r to receive files
- * or kermit s file ... to send files
- *
- * or kermit sv server mode
- *
- * or kermit rc receive into
- * working directory
- *
- * or kermit svc server mode using
- * working directory
- */
-
-
-
-
- /*
- * Modification History:
- *
- * - Changed MYEOL character from \n to \r.
- * - Change char to int in bufill so getc would return -1 on
- * EOF instead of 255 (-1 truncated to 8 bits)
- * - Added read() in rpack to eat the EOL character
- * - Added fflush() call in printmsg to force the output
- * NOTE: The last three changes are not conditionally compiled
- * since they should work equally well on any system.
- *
- * Added support for error packets and cleaned up the printing
- * routines.
- * Added support for Honeyewll running GCOS.
- * Added simple server mode
- */
-
- #include <stdio.h> /* Standard UNIX definitions */
- #include <fildes.h>
- #include <fcntl.h>
- #include <signal.h>
- /* 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 ESCCHR '^' /* Default escape character for CONNECT */
-
- #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 for UTS systems */
-
- #define MYTIME 10 /* Seconds after which I should be timed out */
- #define MAXTIM 60 /* Maximum timeout interval */
- #define MINTIM 2 /* Minumum timeout interval */
-
- #define TRUE -1 /* Boolean constants */
- #define FALSE 0
-
-
- /* Macro Definitions */
-
- /*
- * 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 )
-
-
- /* Global Variables */
-
-
-
-
- int size, /* Size of present data */
- tmpfil, /* User wanted temp file for output */
- cflg, /* cwd flag */
- rpsiz, /* Maximum receive packet size */
- spsiz, /* Maximum send packet size */
- pad, /* How much padding to send */
- timint, /* Timeout for foreign host on sends */
- n, /* Packet number */
- numtry, /* Times this packet retried */
- oldtry, /* Times previous packet retried */
- ttyfd, /* File descriptor of tty for I/O, 0 if remote */
- remote, /* -1 means we're a remote kermit */
- image, /* -1 means 8-bit mode */
- debug, /* indicates level of debugging output (0=none) */
- cnvfilnam, /* -1 means do file name case conversions */
- filecount, /* Number of files left to send */
- state, /* Present state of the automaton */
- padchar, /* Padding character to send */
- eol, /* End-Of-Line character to send */
- escchr, /* Connect command escape character */
- quote; /* Quote character in incoming data */
- char **filelist, /* List of files to be sent */
- *filnam, /* Current file name */
- recpkt[MAXPACKSIZ], /* Receive packet buffer */
- packet[MAXPACKSIZ]; /* Packet buffer */
- char working_directory[40] = "/";
- FILE *fp, /* File pointer for current disk file */
- *fddebug, /* File for debugging output */
- *log; /* File pointer for Logfile */
-
- /*
- * m a i n
- *
- * Main routine - parse command and options, set up the
- * tty lines, and dispatch to the appropriate routine.
- */
-
- main(argc,argv)
- int argc; /* Character pointers to and count of */
- char **argv; /* command line arguments */
- {
- char *ttyname, /* tty name for LINE argument */
- *cp; /* char pointer */
- char savefile[60]; /* work area for filename and cwd */
- int rflg, sflg; /* flags for RECEIVE, SEND */
- int svflg; /* server mode */
- int cmd; /* for parser */
- extern int dobreak(); /* just need its address */
- if (argc < 2) usage(); /* Make sure there's a command line */
-
- cp = *++argv; argv++; argc -= 2; /* Set up pointers to args */
-
- printf("Kermit-GCOS V3.0\n");
-
-
- /* Initialize these values and hope the first packet will get across OK */
-
- eol = CR; /* EOL for outgoing packets */
- quote = '#'; /* Standard control-quote char "#" */
- pad = 0; /* No padding */
- padchar = NULL; /* Use null if any padding wanted */
-
- cflg = 0; sflg = rflg = svflg = 0; /* Turn off all parse flags */
- ttyname = 0; /* Default is remote mode */
- tmpfil = FALSE; /* Create perm files as default */
- image = FALSE; /* translation and filename case */
- cnvfilnam = TRUE; /* conversion for UNIX systems */
-
- while ((*cp) != NULL) /* Parse characters in first */
- {
- cmd = *cp++;
- if (isupper(cmd))
- cmd = tolower(cmd);
- switch (cmd)
- {
- case 's': /* S = Send command */
- sflg++;
- break;
-
- case 'r': /* R = Receive command */
- rflg++;
- break;
- case 'v': /* server mode */
- if (sflg)
- {
- sflg = 0;
- svflg++;
- }
- else
- printf("Unknown mode\n");
- break;
-
- case 'c': /* Change working directory */
- printf("cwd: Enter working directory ");
- gets(working_directory);
- strcat(working_directory, "/");
- cflg++;
- break;
- case 'd': /* D = Increment debug mode count */
- if (!debug)
- if ((fddebug = fopen("kermit.d", "w")) == NULL)
- {
- printf("Could not open kermit.d\n");
- exit(1);
- }
- debug++; break;
-
- case 'f':
- cnvfilnam = FALSE; /* F = don't do case conversion */
- break; /* on filenames */
-
- case 't': /* wants uploaded file to be temp */
- tmpfil++;
- working_directory[0] = '\0'; /* null out string */
- break;
-
-
- }
- }
-
- /* Done parsing */
-
- if ((sflg+rflg+svflg) != 1) /* Only one command allowed */
- usage();
-
- if ((tmpfil + cflg) > 1)
- {
- printf("Can't have working directory and temporary files\n");
- exit();
- }
-
- ttyfd = 0; /* communications line */
- remote = TRUE;
-
- /* Put the proper tty into the correct mode */
-
- system("LINE 160"); /* change line length to 160 chars */
-
- /* Set up tty break vectors */
- signal( _SIGBRK, dobreak);
-
-
- /* All set up, now execute the command that was given. */
-
- if (debug)
- {
- dbprint("Debugging level = %d\n\n",debug);
-
- if (sflg) dbprint("Send command\n\n");
- if (rflg) dbprint("Receive command\n\n");
- if (svflg) dbprint("Server mode\n");
- }
-
- if (svflg)
- servsw();
-
-
- if (sflg) /* Send command */
- {
- if (argc--) filnam = *argv++; /* Get file to send */
- else
- {
- usage(); /* and give error */
- }
- if (cflg) /* see if working directory set */
- {
- strcpy(savefile, working_directory);
- strcat(savefile, filnam);
- filnam = savefile;
- }
- fp = NULL; /* Indicate no file open yet */
- filelist = argv; /* Set up the rest of the file list */
- filecount = argc; /* Number of files left to send */
- state = 'S'; /* Set up initial state */
- printf("Sending file\n");
- if (sendsw(sflg) == FALSE) /* Send the file(s) */
- printmsg("Send failed."); /* Report failure */
- else /* or */
- printmsg("done."); /* success */
- }
-
-
-
-
- if (rflg) /* Receive command */
- {
- state = 'R'; /* Set up initial state */
- printf("Ready to receive file\n");
- if (recsw() == FALSE) /* Receive the file(s) */
- printmsg("Receive failed.");
- else /* Report failure */
- printmsg("done."); /* or success */
- }
- if (debug)
- fclose(fddebug);
- }
-
-
- /*
- * Servsw is the state table switcher for Server mode. It will call
- * sendsw() and recsw() to to the real work.
- */
- servsw()
- {
- int num, len, i;
- int pkttype; /* packet type */
- char savename[60], *cptr;
- printf("Server mode\n");
- while(TRUE)
- {
- n = numtry = 0;
- switch((pkttype = rpack(&len, &num, recpkt)))
- {
- case 'I': /* Info packet */
- rpar(recpkt);
- spar(packet);
- spack('Y',n,6,packet);
- break;
- case 'S':
- rpar(recpkt);
- spar(packet);
- spack('Y',n,6,packet);
- n = (n + 1) % 64;
- state = 'F';
- recsw(); /* go do the file receive */
- break;
- case 'R':
- if (cflg) /* do cwd if there */
- {
- strcpy(savename,working_directory);
- strcat(savename, recpkt);
- }
- else
- strcpy(savename, recpkt); /* save away filename */
- filnam = savename;
- fp = NULL;
- filecount = 0;
- state = 'S'; /* do send now */
- sendsw(FALSE); /* send the file they want */
- break;
- case 'G': /* Generic Kermit command */
- switch(recpkt[0]) /* Command is in first char */
- {
- case 'L': /* logoff kermit and system */
- spack('Y',n,0,0);
- if (debug)
- fclose(fddebug);
- system("LOGOFF"); /* logoff */
- break; /* never get here but ??? */
- case 'F': /* finish kermit return to tss */
- spack('Y',n,0,0);
- return(TRUE);
- case 'C': /* Change working directory */
- spack('Y',n,0,0);
- len = unchar(recpkt[1]);
- cptr = working_directory;
- for (i=2;len;i++,len--)
- *cptr++ = recpkt[i];
- *cptr++ = '/';
- *cptr = '\0';
- break;
- default:
- error("Unemplemented Generic kermit command");
- break;
- }
- break;
- case 'N': /* NAK, ignore */
- break;
- default:
- if (debug)
- dbprint("Unknown packet type %c\n", pkttype);
- error("Unknown packet type");
- }
- }
- }
- /*
- * 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.
- *
- */
-
- sendsw(sflg)
- int sflg; /* need to know if comming in from send or serv */
- {
-
- if (sflg) /* if in send mode then */
- sleep(10); /* give user a chance to start receive */
- n = 0; /* Initialize message number */
- numtry = 0; /* Say no tries yet */
- while(TRUE) /* Do this as long as necessary */
- {
- if (debug) dbprint("sendsw state: %c\n",state);
- switch(state)
- {
- case 'S': state = sinit(); break; /* Send-Init */
- case 'F': state = sfile(); break; /* Send-File */
- case 'D': state = sdata(); break; /* Send-Data */
- case 'Z': state = seof(); break; /* Send-End-of-File */
- case 'B': state = sbreak(); break; /* Send-Break */
- case 'C': return (TRUE); /* Complete */
- case 'A': return (FALSE); /* "Abort" */
- default: return (FALSE); /* Unknown, fail */
- }
- }
- }
-
-
- /*
- * s i n i t
- *
- * Send Initiate: send this host's parameters and get other side's back.
- */
-
- sinit()
- {
- int num, len; /* Packet number, length */
-
-
-
-
- if (numtry++ > MAXTRY) return('A'); /* If too many tries, give up */
- spar(packet); /* Fill up init info packet */
-
-
- spack('S',n,6,packet); /* Send an S packet */
- 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 = '#';
-
- 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.
- */
-
- sfile()
- {
- int num, len; /* Packet number, length */
- char filnam1[50], /* Converted file name */
- *newfilnam, /* Pointer to file name to send */
- *cp; /* char pointer */
-
- if (numtry++ > MAXTRY) return('A'); /* If too many tries, give up */
-
-
-
-
- if (fp == NULL) /* If not already open, */
- { if (debug) dbprint(" Opening %s for sending.\n",filnam);
- fp = fopen(filnam,"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 (cnvfilnam) /* 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 */
- 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
- */
-
- sdata()
- {
- int num, len; /* Packet number, length */
-
- if (numtry++ > MAXTRY) return('A'); /* If too many tries, give up */
-
- spack('D',n,size,packet); /* Send a D packet */
- 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.
- */
-
- seof()
- {
- int num, len; /* Packet number, length */
- if (numtry++ > MAXTRY) return('A'); /* If too many tries, "abort" */
-
-
-
-
- spack('Z',n,0,packet); /* Send a 'Z' packet */
- 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) dbprint(" Closing input file %s, ",filnam);
- fclose(fp); /* Close the input file */
- fp = NULL; /* Set flag indicating no file open */
-
- if (debug) dbprint("looking for next file...\n");
- if (gnxtfl() == FALSE) /* No more files go? */
- return('B'); /* if not, break, EOT, all done */
- if (debug) dbprint(" 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)
- */
-
- sbreak()
- {
- int num, len; /* Packet number, length */
- if (numtry++ > MAXTRY) return('A'); /* If too many tries "abort" */
-
- spack('B',n,0,packet); /* Send a B packet */
- 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()
- {
-
- if (state == 'R')
- n = 0; /* Initialize message number */
- numtry = 0; /* Say no tries yet */
-
- while(TRUE)
- {
- if (debug) dbprint(" 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 */
- case 'C': return(TRUE); /* Complete state */
- case 'A': return(FALSE); /* "Abort" state */
- }
- }
- }
-
-
- /*
- * r i n i t
- *
- * Receive Initialization
- */
-
- rinit()
- {
- int len, num; /* Packet length, number */
-
-
-
-
- if (numtry++ > MAXTRY) return('A'); /* If too many tries, "abort" */
-
- switch(rpack(&len,&num,packet)) /* Get a packet */
- {
- case 'S': /* Send-Init */
- rpar(packet); /* Get the other side's init data */
- spar(packet); /* Fill up packet with my init info */
- 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,0,0); /* Return a NAK */
- return(state); /* Keep trying */
-
- default: return('A'); /* Some other packet type, "abort" */
- }
- }
-
-
- /*
- * r f i l e
- *
- * Receive File Header
- */
-
- rfile()
- {
- int num, len; /* Packet number, length */
- char filnam1[50]; /* Holds the converted file name */
-
- if (numtry++ > MAXTRY) return('A'); /* "abort" if too many tries */
-
- 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,0,0);
- 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 */
- if (!tmpfil) /* fix up to make quick access perm file*/
- {
- strcpy(filnam1, working_directory);
- }
- else
- filnam1[0] = '\0';
- strcat(filnam1, packet); /* Copy the file name */
- if (!tmpfil)
- /* file names can only be 8 chars */
- filnam1[(strlen(working_directory) + 8)] = '\0';
- else
- filnam1[8] = '\0';
- if ((fp=fopen(filnam1,"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,0,0); /* 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,0,0); /* 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,0,0); /* Return a NAK */
- return(state); /* Keep trying */
-
- default: return ('A'); /* Some other packet, "abort" */
- }
- }
-
-
-
-
- /*
- * r d a t a
- *
- * Receive Data
- */
-
- rdata()
- {
- int num, len; /* Packet number, length */
- if (numtry++ > MAXTRY) return('A'); /* "abort" if too many tries */
-
- switch(rpack(&len,&num,packet)) /* Get packet */
- {
- case 'D': /* Got Data packet */
- 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 */
- bufemp(packet,len); /* Write the data to the file */
- spack('Y',n,0,0); /* Acknowledge the packet */
- 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,0,0); /* 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,0,0); /* 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,0,0); /* 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)
- char *data;
- int num, len, type;
- {
- int i,chksum; /* Character loop counter */
- char buffer[100]; /* Checksum, packet buffer */
- register char *bufp; /* Buffer pointer */
-
- if (debug>1) /* Display outgoing packet */
- {
- if (data != NULL)
- data[len] = '\0'; /* Null-terminate data to print it */
- dbprint(" spack type: %c\n",type);
- dbprint(" num: %d\n",num);
- dbprint(" len: %d\n",len);
- if (data != NULL)
- dbprint(" data: \"%s\"\n",data);
- }
-
- bufp = buffer; /* Set up buffer pointer */
- for (i=1; i<=pad; i++) putchar(padchar); /* 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 */
- *bufp = '\0'; /* make it a string */
- write(1, buffer, bufp-buffer+1); /* Send the packet */
- }
-
- /*
- * r p a c k
- *
- * Read a Packet
- */
-
- rpack(len,num,data)
- int *len, *num; /* Packet length, number */
- char *data; /* Packet data */
- {
- int i, done; /* Data character number, loop exit */
- char t, /* Current input character */
- type, /* Packet type */
- cchksum, /* Our (computed) checksum */
- rchksum; /* Checksum received from other host */
-
- while (t != SOH) /* Wait for packet header */
- {
- t = getchar();
- t &= 0177; /* Handle parity */
- }
-
- done = FALSE; /* Got SOH, init loop */
- while (!done) /* Loop to get a packet */
- {
- t = getchar(); /* Get character */
- if (!image) t &= 0177; /* Handle parity */
- if (t == SOH) continue; /* Resynchronize if SOH */
- cchksum = t; /* Start the checksum */
- *len = unchar(t)-3; /* Character count */
-
- t = getchar(); /* Get character */
- if (!image) t &= 0177; /* Handle parity */
- if (t == SOH) continue; /* Resynchronize if SOH */
- cchksum = cchksum + t; /* Update checksum */
- *num = unchar(t); /* Packet number */
-
-
-
-
- t = getchar(); /* Get character */
- if (!image) t &= 0177; /* Handle parity */
- if (t == SOH) continue; /* Resynchronize if SOH */
- cchksum = cchksum + t; /* Update checksum */
- type = t; /* Packet type */
-
- for (i=0; i<*len; i++) /* The data itself, if any */
- { /* Loop for character count */
- t = getchar(); /* Get character */
- if (!image) t &= 0177; /* Handle parity */
- if (t == SOH) continue; /* Resynch if SOH */
- cchksum = cchksum + t; /* Update checksum */
- data[i] = t; /* Put it in the data buffer */
- }
- data[*len] = 0; /* Mark the end of the data */
-
- t = getchar(); /* Get last character (checksum) */
- rchksum = unchar(t); /* Convert to numeric */
- t = getchar(); /* get EOL character and toss it */
- if (!image) t &= 0177; /* Handle parity */
- if (t == SOH) continue; /* Resynchronize if SOH */
- done = TRUE; /* Got checksum, done */
- }
-
-
- if (debug>1) /* Display incoming packet */
- {
- if (data != NULL)
- data[*len] = '\0'; /* Null-terminate data to print it */
- dbprint(" rpack type: %c\n",type);
- dbprint(" num: %d\n",*num);
- dbprint(" len: %d\n",*len);
- if (data != NULL)
- dbprint(" 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 */
- }
-
-
- /*
- * 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 */
-
-
-
-
- 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 in image mode */
- continue;
-
- putc(t,fp);
- }
- }
-
-
- /*
- * g n x t f l
- *
- * Get next file in a file group
- */
-
- gnxtfl()
- {
- static char savename[60];
- if (filecount-- <= 0)
- return(FALSE);
- if (debug)
- dbprint(" gnxtfl: filecount = %d\n", filecount);
- if (debug) dbprint(" gnxtfl: filelist = \"%s\"\n",*filelist);
- filnam = *(filelist++);
- if (cflg) /* want cwd processing ? */
- {
- strcpy(savename, working_directory);
- strcat(savename, filnam);
- filnam = savename;
- }
- return(TRUE);
- }
-
-
- /*
- * 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(MYTIME); /* 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 */
- 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:
- *
- * usage - print command line options showing proper syntax
- * printmsg - like printf with "Kermit: " prepended
- * error - like printmsg if local kermit; sends a error packet if remote
- * prerrpkt - print contents of error packet received from remote host
- */
-
- /*
- * u s a g e
- *
- * Print summary of usage info and quit
- */
-
- usage()
- {
- printf("Usage: kermit s[d] file ... (send mode)\n");
- printf(" or: kermit r[dt] (receive mode)\n");
- printf(" or: kermit sv (server mode)\n");
- printf(" or: kermit sc file ... (cwd & send)\n");
- printf(" or: kermit rc (cwd & receive)\n");
- printf(" or: kermit svc (cwd & server)\n");
- exit(1);
- }
-
- /*
- * p r i n t m s g
- *
- * Print message on standard output if not remote.
- */
-
- /*VARARGS1*/
- printmsg(fmt, a1, a2, a3, a4, a5)
- char *fmt;
- {
- if (!remote)
- {
- printf("Kermit-GCOS: ");
- printf(fmt,a1,a2,a3,a4,a5);
- printf("\n");
- fflush(stdout); /* force output (UTS needs it) */
- }
- if (debug)
- dbprint(fmt, a1, a2, a3, a4, a5);
- }
-
-
-
-
- /*
- * e r r o r
- *
- * Print error message.
- *
- * If local, print error message with printmsg.
- * If remote, send an error packet with the message.
- */
- static char prefmt[80] = "Kermit-GCOS:";
- /*VARARGS1*/
- error(fmt, a1, a2, a3, a4, a5)
- char *fmt;
- {
- char msg[80];
- int len;
- strcpy(&prefmt[12], fmt);
- if (remote)
- {
- sprintf(msg,prefmt,a1,a2,a3,a4,a5); /* Make it a string */
- len = strlen(msg);
- spack('E',n,len,msg); /* Send the error packet */
- }
- else
- printmsg(prefmt, a1, a2, a3, a4, a5);
-
- return;
- }
-
- /*
- * p r e r r p k t
- *
- * Print contents of error packet received from remote host.
- */
- prerrpkt(msg)
- char *msg;
- {
- printf("Kermit aborting with following error from remote host:\n%s\n",
- msg);
- return;
- }
-
-
- dbprint(fmt,arg1,arg2,arg3,arg4,arg5,arg6)
- char *fmt;
- {
- fprintf(fddebug,fmt,arg1,arg2,arg3,arg4,arg5,arg6);
- }
- /* Handle tty breaks comming from micro */
- dobreak()
- {
- fprintf(stderr, "*break*%c\n",007);
- if (debug)
- fclose(fddebug);
- exit();
- }
- /* the following is a datanet-8 model required for kermit-gcos to run */
- /* */
- /* The TTY BREAK is disabled and a control-Y substituted for a break */
- /* the Backspace is used for character delete and the @ sign is passed*/
- /* as data */
- /*
- MODEL PCTRAN ASY -ASCI &
- -LINE 250 &
- -LTSZ 256 &
- -SY96 &
- -STOP 1:2 &
- -OVSZ 2048 &
- -MCOL X'20' &
- -MLIN X'20' &
- -TYPE 23 &
- -FILL X'00' 0 &
- -BRK ATT1 &
- -ATT0 X'17' &
- -ATT1 X'19' &
- -ATT2 X'1A' &
- -INEFF X'00' IGN 0 0 * * &
- -INEFF X'02' FUN 0 0 * * &
- -CR X'03' FUN 0 0 X'0A':X'0D' X'0A':X'0D' &
- -MTROFF X'04' FUN 3 0 * X'04' &
- -INEFF X'05' IGN 0 0 * * &
- -INEFF X'06' IGN 0 0 * * &
- -INEFF X'07' NOR 0 0 * * &
- -BAKSP X'08' ANN 0 0 * * &
- -HT X'09' NOR 0 0 * * &
- -LF X'0A' FUN 0 0 X'0D' X'0D':X'0A' &
- -VT X'0B' FUN 0 0 * * &
- -CR X'0D' FUN 0 0 X'0D':X'0A' X'0D':X'0A' &
- -INEFF X'0E' NOR 0 0 * * &
- -INEFF X'0F' NOR 0 0 * * &
- -RPTL X'10' FUN 0 0 * * &
- -INEFF X'11' NOR 0 0 * * &
- -INEFF X'12' NOR 0 0 * * &
- -INEFF X'13' NOR 0 0 * * &
- -INEFF X'14' NOR 0 0 * * &
- -ETX X'15' FUN 0 0 * * &
- -INEFF X'16' FUN 0 0 * * &
- -EFLIN X'18' FUN 0 0 X'20':X'44':X'45':X'4C':X'0D':X'0A' &
- -INEFF X'1B' NOR 0 0 * * &
- -INEFF X'1C' FUN 0 0 * * &
- -INEFF X'1D' FUN 0 0 * * &
- -INEFF X'1E' FUN 0 0 * * &
- -INEFF X'1F' FUN 0 0 * * &
- *
- */
- /* If the site has NPS, it must be configured to allow SOH (001),*
- * and all printable characters to pass thru as data. It is *
- * a good idea to configure the control-Y key for a break key. *
- */
-