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Annotation of 43BSD/contrib/kermit/ckcmai.c, revision 1.1

1.1     ! root        1: char *versio = "C-Kermit, 4C(057) 31 Jul 85";
        !             2: 
        !             3: /*  C K C M A I  --  C-Kermit Main program  */
        !             4: 
        !             5: /*
        !             6:  Authors: Frank da Cruz, Bill Catchings, Jeff Damens;
        !             7:  Columbia University Center for Computing Activities, 1984-85.
        !             8:  Copyright (C) 1985, Trustees of Columbia University in the City of New York.
        !             9:  Permission is granted to any individual or institution to use, copy, or
        !            10:  redistribute this software so long as it is not sold for profit, provided this
        !            11:  copyright notice is retained. 
        !            12: */
        !            13: /*
        !            14:  The Kermit file transfer protocol was developed at Columbia University.
        !            15:  It is named after Kermit the Frog, star of the television series THE
        !            16:  MUPPET SHOW; the name is used by permission of Henson Associates, Inc.
        !            17:  "Kermit" is also Celtic for "free".
        !            18: */
        !            19: /*
        !            20:  Thanks to Herm Fischer of Encino CA for extensive contributions to version 4,
        !            21:  and to the following people for their contributions over the years:
        !            22: 
        !            23:    Larry Afrin, Clemson U
        !            24:    Charles Brooks, EDN
        !            25:    Bob Cattani, Columbia CS Dept
        !            26:    Alan Crosswell, CUCCA
        !            27:    Carl Fongheiser, CWRU
        !            28:    Yekta Gursel, MIT
        !            29:    Jim Guyton, Rand Corp
        !            30:    Stan Hanks, Rice U.
        !            31:    Ken Harrenstein, SRI
        !            32:    Steve Hemminger, Tektronix
        !            33:    Randy Huntziger, NLM
        !            34:    Chris Maio, Columbia CS Dept
        !            35:    Martin Minow, DEC
        !            36:    Tony Movshon, NYU
        !            37:    Ken Poulton, HP Labs
        !            38:    Frank Prindle, NADC
        !            39:    Stew Rubenstein, Harvard
        !            40:    Dan Schullman, DEC
        !            41:    Bradley Smith, UCLA
        !            42:    Dave Tweten, AMES-NAS
        !            43:    Walter Underwood, Ford Aerospace
        !            44:    Pieter Van Der Linden, Centre Mondial (Paris)
        !            45:    Mark Vasoll & Gregg Wonderly, Oklahoma State University
        !            46:    Lauren Weinstein, Vortex
        !            47: 
        !            48:  and many others.
        !            49: */
        !            50: 
        !            51: #include "ckcker.h"
        !            52: #include "ckcdeb.h"
        !            53: 
        !            54: /* Text message definitions.. each should be 256 chars long, or less. */
        !            55: #ifdef MAC
        !            56: char *hlptxt = "C-Kermit Server Commands:\n\
        !            57: \n\
        !            58: GET filespec, SEND filespec, FINISH, REMOTE HELP\n\
        !            59: \n\0";
        !            60: #else
        !            61: char *hlptxt = "C-Kermit Server Commands Supported:\n\
        !            62: \n\
        !            63: GET filespec   REMOTE CWD [directory]          REMOTE SPACE [directory]\n\
        !            64: SEND filespec  REMOTE DIRECTORY [filespec]     REMOTE HOST command\n\
        !            65: FINISH         REMOTE DELETE filespec          REMOTE WHO [user]\n\
        !            66: REMOTE HELP    REMOTE TYPE filespec            BYE\n\
        !            67: \n\0";
        !            68: #endif
        !            69: char *srvtxt = "\r\n\
        !            70: C-Kermit server starting.  Return to your local machine by typing\r\n\
        !            71: its escape sequence for closing the connection, and issue further\r\n\
        !            72: commands from there.  To shut down the C-Kermit server, issue the\r\n\
        !            73: FINISH or BYE command and then reconnect.\n\
        !            74: \r\n\0";
        !            75: 
        !            76: /* Declarations for Send-Init Parameters */
        !            77: 
        !            78: int spsiz = DSPSIZ,                    /* Biggest packet size we can send */
        !            79:     spsizf = 0,                                /* Flag to override what you ask for */
        !            80:     rpsiz = DRPSIZ,                    /* Biggest we want to receive */
        !            81:     timint = DMYTIM,                   /* Timeout interval I use */
        !            82:     rtimo = URTIME,                    /* Timeout I want you to use */
        !            83:     timef = 0,                         /* Flag to override what you ask */
        !            84:     npad = MYPADN,                     /* How much padding to send */
        !            85:     mypadn = MYPADN,                   /* How much padding to ask for */
        !            86:     chklen = 1,                                /* Length of block check */
        !            87:     bctr = 1,                          /* Block check type requested */
        !            88:     bctu = 1,                          /* Block check type used */
        !            89:     ebq =  MYEBQ,                      /* 8th bit prefix */
        !            90:     ebqflg = 0,                                /* 8th-bit quoting flag */
        !            91:     rpt = 0,                           /* Repeat count */
        !            92:     rptq = MYRPTQ,                     /* Repeat prefix */
        !            93:     rptflg = 0,                                /* Repeat processing flag */
        !            94:     capas = 0;                         /* Capabilities */
        !            95: 
        !            96: CHAR padch = MYPADC,                   /* Padding character to send */
        !            97:     mypadc = MYPADC,                   /* Padding character to ask for */
        !            98:     seol = MYEOL,                      /* End-Of-Line character to send */
        !            99:     eol = MYEOL,                       /* End-Of-Line character to look for */
        !           100:     ctlq = CTLQ,                       /* Control prefix in incoming data */
        !           101:     myctlq = CTLQ;                     /* Outbound control character prefix */
        !           102: 
        !           103: 
        !           104: /* Packet-related variables */
        !           105: 
        !           106: int pktnum = 0,                                /* Current packet number */
        !           107:     prvpkt = -1,                       /* Previous packet number */
        !           108:     sndtyp,                            /* Type of packet just sent */
        !           109:     size,                              /* Current size of output pkt data */
        !           110:     osize,                             /* Previous output packet data size */
        !           111:     maxsize,                           /* Max size for building data field */
        !           112:     spktl;                             /* Length packet being sent */
        !           113: 
        !           114: CHAR sndpkt[MAXPACK*2],                /* Entire packet being sent */
        !           115:     recpkt[RBUFL],                     /* Packet most recently received */
        !           116:     data[MAXPACK+4],                           /* Packet data buffer */
        !           117:     srvcmd[MAXPACK*2],                 /* Where to decode server command */
        !           118:     *srvptr,                           /* Pointer to above */
        !           119:     mystch = SOH,                      /* Outbound packet-start character */
        !           120:     stchr = SOH;                       /* Incoming packet-start character */
        !           121: 
        !           122: /* File-related variables */
        !           123: 
        !           124: CHAR filnam[50];                       /* Name of current file. */
        !           125: 
        !           126: int nfils;                             /* Number of files in file group */
        !           127: long fsize;                            /* Size of current file */
        !           128: 
        !           129: /* Communication line variables */
        !           130: 
        !           131: CHAR ttname[50];                       /* Name of communication line. */
        !           132: 
        !           133: int parity,                            /* Parity specified, 0,'e','o',etc */
        !           134:     flow,                              /* Flow control, 1 = xon/xoff */
        !           135:     speed = -1,                                /* Line speed */
        !           136:     turn = 0,                          /* Line turnaround handshake flag */
        !           137:     turnch = XON,                      /* Line turnaround character */
        !           138:     duplex = 0,                                /* Duplex, full by default */
        !           139:     escape = 034,                      /* Escape character for connect */
        !           140:     delay = DDELAY,                    /* Initial delay before sending */
        !           141:     mdmtyp = 0;                                /* Modem type (initially none)  */
        !           142: 
        !           143: 
        !           144: /* Statistics variables */
        !           145: 
        !           146: long filcnt,                   /* Number of files in transaction */
        !           147:     flci,                      /* Characters from line, current file */
        !           148:     flco,                      /* Chars to line, current file  */
        !           149:     tlci,                      /* Chars from line in transaction */
        !           150:     tlco,                      /* Chars to line in transaction */
        !           151:     ffc,                       /* Chars to/from current file */
        !           152:     tfc;                       /* Chars to/from files in transaction */
        !           153: 
        !           154: int tsecs;                     /* Seconds for transaction */
        !           155: 
        !           156: /* Flags */
        !           157: 
        !           158: int deblog = 0,                                /* Flag for debug logging */
        !           159:     pktlog = 0,                                /* Flag for packet logging */
        !           160:     seslog = 0,                                /* Session logging */
        !           161:     tralog = 0,                                /* Transaction logging */
        !           162:     displa = 0,                                /* File transfer display on/off */
        !           163:     stdouf = 0,                                /* Flag for output to stdout */
        !           164:     xflg   = 0,                                /* Flag for X instead of F packet */
        !           165:     hcflg  = 0,                                /* Doing Host command */
        !           166:     fncnv  = 1,                                /* Flag for file name conversion */
        !           167:     binary = 0,                                /* Flag for binary file */
        !           168:     savmod = 0,                                /* Saved file mode */
        !           169:     warn   = 0,                                /* Flag for file warning */
        !           170:     quiet  = 0,                                /* Be quiet during file transfer */
        !           171:     local  = 0,                                /* Flag for external tty vs stdout */
        !           172:     server = 0,                                /* Flag for being a server */
        !           173:     cnflg  = 0,                                /* Connect after transaction */
        !           174:     cxseen = 0,                                /* Flag for cancelling a file */
        !           175:     czseen = 0,                        /* Flag for cancelling file group */
        !           176:     keep = 0;                          /* Keep incomplete files */
        !           177: 
        !           178: /* Variables passed from command parser to protocol module */
        !           179: 
        !           180: char parser();                         /* The parser itself */
        !           181: char sstate  = 0;                      /* Starting state for automaton */
        !           182: char *cmarg  = "";                     /* Pointer to command data */
        !           183: char *cmarg2 = "";                     /* Pointer to 2nd command data */
        !           184: char **cmlist;                         /* Pointer to file list in argv */
        !           185: 
        !           186: /* Miscellaneous */
        !           187: 
        !           188: char **xargv;                          /* Global copies of argv */
        !           189: int  xargc;                            /* and argc  */
        !           190: 
        !           191: extern char *dftty;                    /* Default tty name from ckx???.c */
        !           192: extern int dfloc;                      /* Default location: remote/local */
        !           193: extern int dfprty;                     /* Default parity */
        !           194: extern int dfflow;                     /* Default flow control */
        !           195: 
        !           196: /*  M A I N  --  C-Kermit main program  */
        !           197: 
        !           198: main(argc,argv) int argc; char **argv; {
        !           199: 
        !           200:     char *strcpy();
        !           201: 
        !           202: /* Do some initialization */
        !           203: 
        !           204:     xargc = argc;                      /* Make global copies of argc */
        !           205:     xargv = argv;                      /* ...and argv. */
        !           206:     sstate = 0;                                /* No default start state. */
        !           207:     strcpy(ttname,dftty);              /* Set up default tty name. */
        !           208:     local = dfloc;                     /* And whether it's local or remote. */
        !           209:     parity = dfprty;                   /* Set initial parity, */
        !           210:     flow = dfflow;                     /* and flow control. */
        !           211:     sysinit();                         /* And any system-dependent things. */
        !           212:     
        !           213: /* Look for a UNIX-style command line... */
        !           214: 
        !           215:     if (argc > 1) {                    /* Command line arguments? */
        !           216:        sstate = cmdlin();              /* Yes, parse. */
        !           217:        if (sstate) {
        !           218:            proto();                    /* Take any requested action, then */
        !           219:            if (!quiet) conoll("");     /* put cursor back at left margin, */
        !           220:            if (cnflg) conect();        /* connect if requested, */
        !           221:            doexit(GOOD_EXIT);          /* and then exit with status 0. */
        !           222:        }
        !           223:     }  
        !           224:     
        !           225: /* If no action requested on command line, enter interactive parser */
        !           226: 
        !           227:     cmdini();                          /* Initialize command parser */
        !           228:     while(sstate = parser()) {         /* Loop getting commands. */
        !           229:        if (sstate) proto();            /* Enter protocol if requested. */
        !           230:     }
        !           231: }

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