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Annotation of coherent/e/bin/cku179/ckcfn3.c, revision 1.1

1.1     ! root        1: /*  C K C F N 3  --  Packet buffer management for C-Kermit  */
        !             2: 
        !             3: /* See copyright notice at top of ckcfns.c. */
        !             4: 
        !             5: /* (plus assorted functions tacked on at the end) */
        !             6: 
        !             7: #include "ckcdeb.h"
        !             8: #include "ckcasc.h"
        !             9: #include "ckcker.h"
        !            10: #include "ckcxla.h"
        !            11: 
        !            12: extern int unkcs, wmax, discard, bctu, local;
        !            13: extern CHAR *data;
        !            14: extern char filnam[];
        !            15: #ifndef NOFRILLS
        !            16: extern int rprintf, rmailf;            /* REMOTE MAIL, PRINT */
        !            17: extern char optbuf[];                  /* Options buffer for mail, print */
        !            18: #endif /* NOFRILLS */
        !            19: extern int wslots;
        !            20: extern int fblksiz, frecl, forg, frecfm, fncact, fcctrl, lf_opts;
        !            21: #ifdef DYNAMIC
        !            22:   extern CHAR *srvcmd;
        !            23: #else
        !            24:   extern CHAR srvcmd[];
        !            25: #endif
        !            26: 
        !            27: extern int binary, spsiz;
        !            28: extern int pktnum, cxseen, czseen, bsave, bsavef, nfils, stdinf;
        !            29: extern int memstr, stdouf, keep, sndsrc, hcflg;
        !            30: extern int server, en_cwd;
        !            31: 
        !            32: extern int
        !            33:   atenci, atenco, atdati, atdato, atleni, atleno, atblki, atblko,
        !            34:   attypi, attypo, atsidi, atsido, atsysi, atsyso, atdisi, atdiso; 
        !            35: 
        !            36: extern long fsize, filcnt, ffc, tfc;
        !            37: 
        !            38: #ifndef NOCSETS
        !            39: extern int tcharset, fcharset;
        !            40: extern int ntcsets;
        !            41: extern struct csinfo tcsinfo[], fcsinfo[];
        !            42: 
        !            43: /* Pointers to translation functions */
        !            44: extern CHAR (*xlr[MAXTCSETS+1][MAXFCSETS+1])();        
        !            45: extern CHAR (*xls[MAXTCSETS+1][MAXFCSETS+1])();        
        !            46: extern CHAR (*rx)();   /* Pointer to input character translation function */
        !            47: extern CHAR (*sx)();    /* Pointer to output character translation function */
        !            48: #endif /* NOCSETS */
        !            49: 
        !            50: /* Variables global to Kermit that are defined in this module */
        !            51: 
        !            52: int winlo;                             /* packet number at low window edge  */
        !            53: 
        !            54: int sbufnum;                           /* number of free buffers */
        !            55: int dum001 = 1234;                     /* protection... */
        !            56: int sbufuse[MAXWS];                    /* buffer in-use flag */
        !            57: int dum003 = 1111;
        !            58: int rbufnum;                           /* number of free buffers */
        !            59: int dum002 = 4321;                     /* more protection */
        !            60: int rbufuse[MAXWS];                    /* buffer in-use flag */
        !            61: int sseqtbl[64];                       /* sequence # to buffer # table */
        !            62: int rseqtbl[64];                       /* sequence # to buffer # table */
        !            63: int sacktbl[64];                       /* sequence # ack table */
        !            64: 
        !            65: #ifdef DYNAMIC
        !            66: struct pktinfo *s_pkt = NULL;          /* array of pktinfo structures */
        !            67: struct pktinfo *r_pkt = NULL;          /* array of pktinfo structures */
        !            68: #else
        !            69: struct pktinfo s_pkt[MAXWS];           /* array of pktinfo structures */
        !            70: struct pktinfo r_pkt[MAXWS];           /* array of pktinfo structures */
        !            71: #endif /* DYNAMIC */
        !            72: 
        !            73: char xbuf[200];                                /* For debug logging */
        !            74: 
        !            75: #ifdef DYNAMIC
        !            76: CHAR *bigsbuf = NULL, *bigrbuf = NULL;
        !            77: #else
        !            78: char bigsbt[8];                                /* Protection (shouldn't need this). */
        !            79:                                        /* BUT DON'T REMOVE IT! */
        !            80: CHAR bigsbuf[SBSIZ + 5];               /* Send-packet buffer area */
        !            81: char bigrbt[8];                                /* Safety padding */
        !            82: CHAR bigrbuf[RBSIZ + 5];               /* Receive-packet area */
        !            83: #endif
        !            84: int bigsbsiz = SBSIZ;                  /* Sizes of big send & rcv buffers. */
        !            85: int bigrbsiz = RBSIZ;
        !            86: 
        !            87: /* FUNCTIONS */
        !            88: 
        !            89: /* For sanity, use "i" for buffer slots, "n" for packet numbers. */
        !            90: 
        !            91: /* I N I B U F S */
        !            92: 
        !            93: /*
        !            94:   Allocates the big send and receive buffers.
        !            95:   Call with size for big send buffer (s) and receive buffer (r).
        !            96:   These sizes can be different.
        !            97:   Attempts to allocate buffers of the requested size, but if it can't,
        !            98:   it will allocate smaller ones.
        !            99:   Sets global variables bigsbsiz and bigrbsiz to the actual sizes,
        !           100:   and bigsbuf and bigrbuf pointing to the actual buffers.
        !           101:   Designed to be called more than once.
        !           102:   Returns 0 on success, -1 on failure.
        !           103: */
        !           104: 
        !           105: CHAR *bigbufp = NULL;
        !           106: 
        !           107: int
        !           108: inibufs(s,r) int s, r; {
        !           109: #ifdef DYNAMIC
        !           110:     int size, x;
        !           111:     long z;
        !           112: 
        !           113:     if (s < 80 || r < 80) return(-1);  /* Validate arguments. */
        !           114: 
        !           115:     if (!s_pkt) {                      /* Allocate packet info structures */
        !           116:        if (!(s_pkt = (struct pktinfo *) malloc(sizeof(struct pktinfo)*MAXWS)))
        !           117:          fatal("ini_pkts: no memory for s_pkt");
        !           118:     }
        !           119:     if (!r_pkt) {
        !           120:        if (!(r_pkt = (struct pktinfo *) malloc(sizeof(struct pktinfo)*MAXWS)))
        !           121:          fatal("ini_pkts: no memory for s_pkt");
        !           122:     }
        !           123:     if (!srvcmd) {                     /* Allocate srvcmd buffer */
        !           124:        srvcmd = (CHAR *) malloc(r + 100);
        !           125:        if (!srvcmd) return(-1);
        !           126:     }
        !           127:     if (bigbufp) {                     /* Free previous buffers, if any. */
        !           128:        free(bigbufp);
        !           129:        bigbufp = NULL;
        !           130:     }
        !           131:     size = s + r + 40;                 /* Combined requested size + padding */
        !           132: 
        !           133:     /* Try to get the space.  If malloc fails, try to get a little less. */
        !           134:     /* (Obviously, this algorithm can be refined.) */
        !           135: 
        !           136:     while (!(bigbufp = (CHAR *) malloc(size))) {
        !           137:        size = (size * 3) / 2;          /* Failed, cut size by 1/3. */
        !           138:        if (size < 200)                 /* Try again until too small. */
        !           139:          return(-1);
        !           140:     }
        !           141:     debug(F101,"inibufs size","",size);        /* OK, we got some space. */
        !           142: 
        !           143: /*
        !           144:   Now divide the allocated space between the send and receive buffers in the
        !           145:   requested proportion.  The natural formula would be (s / (s + r)) * size
        !           146:   (for the send buffer), but that doesn't work with integer arithmetic and we
        !           147:   can't use floating point because some machines don't have it.  This can be
        !           148:   rearranged as (s * size) / (s + r).  But (s * size) can be VERY large, too
        !           149:   large for 32 bits.  So let's do it this way.  This arithmetic works for
        !           150:   buffer sizes up to about 5,000,000.
        !           151: */
        !           152: #define FACTOR 20L
        !           153:     z = ( (long) s * FACTOR ) / ( (long) s + (long) r );
        !           154:     x = ( z * ( (long) size / FACTOR ) );
        !           155:     if (x < 0) return(-1);             /* Catch overflow */
        !           156: 
        !           157:     bigsbsiz = x - 5;                  /* Size of send buffer */
        !           158:     bigsbuf = bigbufp;                 /* Address of send buffer */
        !           159:     debug(F101,"inibufs bigsbsiz","",bigsbsiz);
        !           160: 
        !           161:     bigrbsiz = size - x - 5;           /* Size of receive buffer */
        !           162:     bigrbuf = bigbufp + x;             /* Addresss of receive buffer */
        !           163:     debug(F101,"inibufs bigrbsiz","",bigrbsiz);
        !           164: 
        !           165:     return(0);                         /* Success */
        !           166: #else                                  /* No dynamic allocation */
        !           167:     bigsbsiz = SBSIZ;                  /* Just use the symbols */
        !           168:     bigrbsiz = RBSIZ;                  /* ... */
        !           169:     return(0);                         /* Success. */
        !           170: #endif /* DYNAMIC */
        !           171: }
        !           172: 
        !           173: 
        !           174: /* M A K E B U F  --  Makes and clears a new buffers.  */
        !           175: 
        !           176: /* Call with: */
        !           177: /*  slots:  number of buffer slots to make, 1 to 31 */
        !           178: /*  bufsiz: size of the big buffer */
        !           179: /*  buf:    address of the big buffer */
        !           180: /*  xx:     pointer to array of pktinfo structures for these buffers */
        !           181: 
        !           182: /* Subdivides the big buffer into "slots" buffers. */
        !           183: 
        !           184: /* Returns: */
        !           185: /*  -1 if too many or too few slots requested,     */
        !           186: /*  -2 if slots would be too small.      */
        !           187: /*   n (positive) on success = size of one buffer. */
        !           188: /*   with pktinfo structure initialized for this set of buffers. */
        !           189: 
        !           190: int
        !           191: makebuf(slots,bufsiz,buf,xx)
        !           192: /* makebuf */ int slots, bufsiz; CHAR buf[]; struct pktinfo *xx; {
        !           193: 
        !           194:     CHAR *a;
        !           195:     int i, size;
        !           196: 
        !           197:     debug(F101,"makebuf","",slots);
        !           198:     debug(F101,"makebuf bufsiz","",bufsiz);
        !           199:     debug(F101,"makebuf MAXWS","",MAXWS);
        !           200: 
        !           201:     if (slots > MAXWS || slots < 1) return(-1);
        !           202:     if (bufsiz < slots * 10 ) return(-2);
        !           203: 
        !           204:     size = bufsiz / slots;             /* Divide up the big buffer. */
        !           205:     a = buf;                           /* Address of first piece. */
        !           206: 
        !           207:     for (i = 0; i < slots; i++) {
        !           208:        struct pktinfo *x = &xx[i];
        !           209:        x->bf_adr = a;                  /* Address of this buffer */
        !           210:        x->bf_len = size;               /* Length of this buffer */
        !           211:        x->pk_len = 0;                  /* Length of data field */
        !           212:         x->pk_typ = ' ';               /* packet type */
        !           213:        x->pk_seq = -1;                 /* packet sequence number */
        !           214:         x->pk_flg = 0;                 /* ack'd bit */
        !           215:         x->pk_rtr = 0;                 /* retransmissions */
        !           216:        *a = '\0';                      /* Clear the buffer */
        !           217:        a += size;                      /* Position to next buffer slot */
        !           218:     }
        !           219:     return(size);
        !           220: }
        !           221: 
        !           222: /*  M A K S B U F  --  Makes the send-packet buffer  */
        !           223: 
        !           224: int
        !           225: mksbuf(slots) int slots; {
        !           226:     int i, x;
        !           227:     sbufnum = 0;
        !           228:     if ((x = makebuf(slots,bigsbsiz,bigsbuf,s_pkt)) < 0) {
        !           229:        debug(F101,"mksbuf makebuf return","",x);
        !           230:        return(x);
        !           231:     }
        !           232:     debug(F101,"mksbuf makebuf return","",x);
        !           233:     for (i = 0; i < 64; i++) {         /* Initialize sequence-number- */
        !           234:        sseqtbl[i] = -1;                /* to-buffer-number table. */
        !           235:         sacktbl[i] = 0;
        !           236:     }
        !           237:     for (i = 0; i < MAXWS; i++)
        !           238:       sbufuse[i] = 0;                  /* Mark each buffer as free */
        !           239:     sbufnum = slots;
        !           240:     return(x);
        !           241: }
        !           242: 
        !           243: /*  M A K R B U F  --  Makes the receive-packet buffer  */
        !           244: 
        !           245: int
        !           246: mkrbuf(slots) int slots; {
        !           247:     int i, x;
        !           248:     rbufnum = 0;
        !           249:     if ((x = makebuf(slots,bigrbsiz,bigrbuf,r_pkt)) < 0) {
        !           250:        debug(F101,"mkrbuf makebuf return","",x);
        !           251:        return(x);
        !           252:     }
        !           253:     debug(F101,"mkrbuf makebuf return","",x);
        !           254:     for (i = 0; i < 64; i++) {         /* Initialize sequence-number- */
        !           255:        rseqtbl[i] = -1;                /* to-buffer-number table. */
        !           256:     }
        !           257:     for (i = 0; i < MAXWS; i++)
        !           258:       rbufuse[i] = 0;                  /* Mark each buffer as free */
        !           259:     rbufnum = slots;
        !           260:     return(x);
        !           261: }
        !           262: 
        !           263: /*  W I N D O W  --  Resize the window to n  */
        !           264: 
        !           265: int
        !           266: window(n) int n; {
        !           267:     debug(F101,"window","",n);
        !           268:     if (n < 1 || n > 31) return(-1);
        !           269:     if (mksbuf(n) < 0) return(-1);
        !           270:     if (mkrbuf(n) < 0) return(-1);
        !           271:     wslots = n;
        !           272: #ifdef DEBUG
        !           273:     if (deblog) dumpsbuf();
        !           274:     if (deblog) dumprbuf();
        !           275: #endif /* DEBUG */
        !           276:     return(0);
        !           277: }
        !           278: 
        !           279: /*  G E T S B U F  --  Allocate a send-buffer.  */
        !           280: 
        !           281: /*  Call with packet sequence number to allocate buffer for. */
        !           282: /*  Returns: */
        !           283: /*   -4 if argument is invalid (negative, or greater than 63) */
        !           284: /*   -3 if buffers were thought to be available but really weren't (bug!) */
        !           285: /*   -2 if the number of free buffers is negative (bug!) */
        !           286: /*   -1 if no free buffers. */
        !           287: /*   0 or positive, packet sequence number, with buffer allocated for it. */
        !           288: 
        !           289: int
        !           290: getsbuf(n) int n; {                    /* Allocate a send-buffer */
        !           291:     int i;
        !           292:     if (n < 0 || n > 63) {
        !           293:        debug(F101,"getsbuf bad arg","",n);
        !           294:        return(-4);     /* Bad argument */
        !           295:     }
        !           296:     debug(F101,"getsbuf, packet","",n);
        !           297:     debug(F101,"getsbuf, sbufnum","",sbufnum);
        !           298:     if (sbufnum == 0) return(-1);      /* No free buffers. */
        !           299:     if (sbufnum < 0) return(-2);       /* Shouldn't happen. */
        !           300:     for (i = 0; i < wslots; i++)       /* Find the first one not in use. */
        !           301:       if (sbufuse[i] == 0) {           /* Got one? */
        !           302:          sbufuse[i] = 1;               /* Mark it as in use. */
        !           303:          sbufnum--;                    /* One less free buffer. */
        !           304:          *s_pkt[i].bf_adr = '\0';      /* Zero the buffer data field */
        !           305:          s_pkt[i].pk_seq = n;          /* Put in the sequence number */
        !           306:           sseqtbl[n] = i;              /* Back pointer from sequence number */
        !           307:           sacktbl[n] = 0;              /* ACK flag */
        !           308:          s_pkt[i].pk_len = 0;          /* Data field length now zero. */
        !           309:          s_pkt[i].pk_typ = ' ';        /* Blank the packet type too. */
        !           310:          s_pkt[i].pk_flg = 0;          /* Zero the flags */
        !           311:          s_pkt[i].pk_rtr = 0;          /* Zero the retransmission count */
        !           312:          data = s_pkt[i].bf_adr + 7;   /* Set global "data" address. */
        !           313:          if (i+1 > wmax) wmax = i+1;   /* For statistics. */
        !           314:          return(n);                    /* Return its index. */
        !           315:       }
        !           316:     sbufnum = 0;                       /* Didn't find one. */
        !           317:     return(-3);                                /* Shouldn't happen! */
        !           318: }
        !           319: 
        !           320: int
        !           321: getrbuf() {                            /* Allocate a receive buffer */
        !           322:     int i;
        !           323:     debug(F101,"getrbuf rbufnum","",rbufnum);
        !           324:     debug(F101,"getrbuf wslots","",wslots);
        !           325:     debug(F101,"getrbuf dum002","",dum002);
        !           326:     debug(F101,"getrbuf dum003","",dum003);
        !           327:     if (rbufnum == 0) return(-1);      /* No free buffers. */
        !           328:     if (rbufnum < 0) return(-2);       /* Shouldn't happen. */
        !           329:     for (i = 0; i < wslots; i++)       /* Find the first one not in use. */
        !           330:       if (rbufuse[i] == 0) {           /* Got one? */
        !           331:          rbufuse[i] = 1;               /* Mark it as in use. */
        !           332:          *r_pkt[i].bf_adr = '\0';      /* Zero the buffer data field */
        !           333:          rbufnum--;                    /* One less free buffer. */
        !           334:          debug(F101,"getrbuf new rbufnum","",rbufnum);
        !           335:          if (i+1 > wmax) wmax = i+1;   /* For statistics. */
        !           336:          return(i);                    /* Return its index. */
        !           337:       }
        !           338:     debug(F101,"getrbuf foulup","",i);
        !           339:     rbufnum = 0;                       /* Didn't find one. */
        !           340:     return(-3);                                /* Shouldn't happen! */
        !           341: }
        !           342: 
        !           343: /*  F R E E S B U F  --  Free send-buffer for given packet sequence number */
        !           344: 
        !           345: /*  Returns:  */
        !           346: /*   1 upon success  */
        !           347: /*  -1 if specified buffer does not exist */
        !           348: 
        !           349: int
        !           350: freesbuf(n) int n; {                   /* Release send-buffer for packet n. */
        !           351:     int i;
        !           352: 
        !           353:     debug(F101,"freesbuf","",n);
        !           354:     if (n < 0 || n > 63)               /* No such packet. */
        !           355:       return(-1);
        !           356:     i = sseqtbl[n];                    /* Get the window slot number. */
        !           357:     if (i > -1 && i <= wslots) {
        !           358:        sseqtbl[n] = -1;                /* If valid, remove from seqtbl */
        !           359:        sbufnum++;                      /* and count one more free buffer */
        !           360:        sbufuse[i] = 0;                 /* and mark it as free, */
        !           361:     } else {
        !           362:        debug(F101," sseqtbl[n]","",sseqtbl[n]);
        !           363:        return(-1);
        !           364:     }
        !           365: 
        !           366: /* The following is done only so dumped buffers will look right. */
        !           367: 
        !           368:     if (1) {
        !           369:        *s_pkt[i].bf_adr = '\0';        /* Zero the buffer data field */
        !           370:        s_pkt[i].pk_seq = -1;           /* Invalidate the sequence number */
        !           371:        s_pkt[i].pk_len = 0;            /* Data field length now zero. */
        !           372:        s_pkt[i].pk_typ = ' ';          /* Blank the packet type too. */
        !           373:        s_pkt[i].pk_flg = 0;            /* And zero the flag */
        !           374:        s_pkt[i].pk_rtr = 0;            /* And the retries field. */
        !           375:     }
        !           376:     return(1);
        !           377: }
        !           378: 
        !           379: int
        !           380: freerbuf(i) int i; {                   /* Release receive-buffer slot "i". */
        !           381:     int n;
        !           382: 
        !           383: /* NOTE !! Currently, this function frees the indicated buffer, but */
        !           384: /* does NOT erase the data.  The program counts on this.  Will find a */
        !           385: /* better way later.... */
        !           386: 
        !           387:     debug(F101,"freerbuf, slot","",i);
        !           388:     if (i < 0 || i >= wslots) {                /* No such slot. */
        !           389:        debug(F101,"freerbuf no such slot","",i);
        !           390:        return(-1);
        !           391:     }
        !           392:     n = r_pkt[i].pk_seq;               /* Get the packet sequence number */
        !           393:     debug(F101,"freerbuf, packet","",n);
        !           394:     if (n > -1 && n < 64)              /* If valid, remove from seqtbl */
        !           395:       rseqtbl[n] = -1;
        !           396:     if (rbufuse[i] != 0) {             /* If really allocated, */
        !           397:        rbufuse[i] = 0;                 /* mark it as free, */
        !           398:        rbufnum++;                      /* and count one more free buffer. */
        !           399:        debug(F101,"freerbuf, new rbufnum","",rbufnum);
        !           400:     }
        !           401: 
        !           402: /* The following is done only so dumped buffers will look right. */
        !           403: 
        !           404:     if (1) {
        !           405:      /* *r_pkt[i].bf_adr = '\0'; */    /* Zero the buffer data field */
        !           406:        r_pkt[i].pk_seq = -1;           /* And from packet list */
        !           407:        r_pkt[i].pk_len = 0;            /* Data field length now zero. */
        !           408:        r_pkt[i].pk_typ = ' ';          /* Blank the packet type too. */
        !           409:        r_pkt[i].pk_flg = 0;            /* And zero the flag */
        !           410:        r_pkt[i].pk_rtr = 0;            /* And the retries field. */
        !           411:     }
        !           412:     return(1);
        !           413: }
        !           414: 
        !           415: /* This is like freerbuf, except it's called with a packet sequence number */
        !           416: /* rather than a packet buffer index. */
        !           417: 
        !           418: VOID
        !           419: freerpkt(seq) int seq; {
        !           420:     int k;
        !           421:     debug(F101,"freerpkt seq","",seq);
        !           422:     k = rseqtbl[seq];
        !           423:     debug(F101,"freerpkt k","",k);
        !           424:     if (k > -1) {
        !           425:        k = freerbuf(k);
        !           426:        debug(F101,"freerpkt freerbuf","",k);
        !           427:     }
        !           428: }
        !           429: 
        !           430: 
        !           431: /*  C H K W I N  --  Check if packet n is in window. */
        !           432: 
        !           433: /*  Returns: */
        !           434: /*    0 if it is in the current window,  */
        !           435: /*   +1 if it would have been in previous window (e.g. if ack was lost), */
        !           436: /*   -1 if it is outside any window (protocol error),   */
        !           437: /*   -2 if either of the argument packet numbers is out of range.  */
        !           438: 
        !           439: /* Call with packet number to check (n), lowest packet number in window */
        !           440: /* (bottom), and number of slots in window (slots).  */
        !           441: 
        !           442: int
        !           443: chkwin(n,bottom,slots) int n, bottom, slots; {
        !           444:     int top, prev;
        !           445: 
        !           446:     debug(F101,"chkwin packet","",n);
        !           447:     debug(F101,"chkwin winlo","",bottom);
        !           448:     debug(F101,"chkwin slots","",slots);
        !           449: 
        !           450: /* First do the easy and common cases, where the windows are not split. */
        !           451: 
        !           452:     if (n < 0 || n > 63 || bottom < 0 || bottom > 63)
        !           453:       return(-2);
        !           454: 
        !           455:     if (n == bottom) return(0);                /* In a perfect world... */
        !           456: 
        !           457:     top = bottom + slots;              /* Calculate window top. */
        !           458:     if (top < 64 && n < top && n >= bottom)
        !           459:       return(0);                       /* In current window. */
        !           460: 
        !           461:     prev = bottom - slots;             /* Bottom of previous window. */
        !           462:     if (prev > -1 && n < bottom && n > prev)
        !           463:       return(1);                       /* In previous. */
        !           464: 
        !           465: /* Now consider the case where the current window is split. */
        !           466: 
        !           467:     if (top > 63) {                    /* Wraparound... */
        !           468:        top -= 64;                      /* Get modulo-64 sequence number */
        !           469:        if (n < top || n >= bottom) {
        !           470:            return(0);                  /* In current window. */
        !           471:        } else {                        /* Not in current window. */
        !           472:            if (n < bottom && n >= prev) /* Previous window can't be split. */
        !           473:              return(1);                /* In previous window. */
        !           474:            else
        !           475:              return(-1);               /* Not in previous window. */
        !           476:        }
        !           477:     }
        !           478: 
        !           479: /* Now the case where current window not split, but previous window is. */ 
        !           480: 
        !           481:     if (prev < 0) {                    /* Is previous window split? */
        !           482:        prev += 64;                     /* Yes. */
        !           483:        if (n < bottom || n >= prev)
        !           484:          return(1);                    /* In previous window. */
        !           485:     } else {                           /* Previous window not split. */
        !           486:        if (n < bottom && n >= prev)
        !           487:          return(1);                    /* In previous window. */
        !           488:     }
        !           489:     
        !           490: /* It's not in the current window, and not in the previous window... */
        !           491: 
        !           492:     return(-1);                                /* So it's not in any window. */
        !           493: }
        !           494: 
        !           495: int
        !           496: dumpsbuf() {                           /* Dump send-buffers */
        !           497: #ifdef DEBUG
        !           498:     int j, x;                          /* to debug log. */
        !           499: 
        !           500:     if (! deblog) return(0);
        !           501:     x = zsoutl(ZDFILE,"SEND BUFFERS:");
        !           502:     if (x < 0) {
        !           503:        deblog = 0;
        !           504:        return(0);
        !           505:     }
        !           506:     x=zsoutl(ZDFILE,"buffer inuse address length data type seq flag retries");
        !           507:     if (x < 0) {
        !           508:        deblog = 0;
        !           509:        return(0);
        !           510:     }
        !           511:     for ( j = 0; j < wslots; j++ ) {
        !           512:        sprintf(xbuf,"%4d%6d%10d%5d%6d%4c%5d%5d%6d\n",
        !           513:               j,
        !           514:               sbufuse[j],
        !           515:               s_pkt[j].bf_adr, 
        !           516:               s_pkt[j].bf_len,
        !           517:               s_pkt[j].pk_len,
        !           518:               s_pkt[j].pk_typ,
        !           519:               s_pkt[j].pk_seq,
        !           520:               s_pkt[j].pk_flg,
        !           521:               s_pkt[j].pk_rtr
        !           522:               );
        !           523:        if (zsout(ZDFILE,xbuf) < 0)  {
        !           524:            deblog = 0;
        !           525:            return(0);
        !           526:        }
        !           527:        if (s_pkt[j].pk_adr) {
        !           528:            x = (int)strlen((char *) s_pkt[j].pk_adr);
        !           529:            if (x)
        !           530:              sprintf(xbuf,"[%.72s%s]\n",s_pkt[j].pk_adr, x > 72 ? "..." : "");
        !           531:            else
        !           532:              sprintf(xbuf,"[(empty string)]\n");
        !           533:        } else {
        !           534:            sprintf(xbuf,"[(null pointer)]\n");
        !           535:        }
        !           536:        if (zsout(ZDFILE,xbuf) < 0) {
        !           537:            deblog = 0;
        !           538:            return(0);
        !           539:        }
        !           540:     }
        !           541:     sprintf(xbuf,"free: %d, winlo: %d\n", sbufnum, winlo);
        !           542:     if (zsout(ZDFILE,xbuf) < 0) {
        !           543:        deblog = 0;
        !           544:        return(0);
        !           545:     }
        !           546:     return(0);
        !           547: #endif /* DEBUG */
        !           548: }
        !           549: int
        !           550: dumprbuf() {                           /* Dump receive-buffers */
        !           551: #ifdef DEBUG
        !           552:     int j, x;
        !           553:     if (! deblog) return(0);
        !           554:     if (zsoutl(ZDFILE,"RECEIVE BUFFERS:") < 0) {
        !           555:        deblog = 0;
        !           556:        return(0);
        !           557:     }
        !           558:     x=zsoutl(ZDFILE,"buffer inuse address length data type seq flag retries");
        !           559:     if (x < 0) {
        !           560:        deblog = 0;
        !           561:        return(0);
        !           562:     }
        !           563:     for ( j = 0; j < wslots; j++ ) {
        !           564:        sprintf(xbuf,"%4d%6d%10d%5d%6d%4c%5d%5d%6d\n",
        !           565:               j,
        !           566:               rbufuse[j],
        !           567:               r_pkt[j].bf_adr, 
        !           568:               r_pkt[j].bf_len,
        !           569:               r_pkt[j].pk_len,
        !           570:               r_pkt[j].pk_typ,
        !           571:               r_pkt[j].pk_seq,
        !           572:               r_pkt[j].pk_flg,
        !           573:               r_pkt[j].pk_rtr
        !           574:               );
        !           575:        if (zsout(ZDFILE,xbuf) < 0) {
        !           576:            deblog = 0;
        !           577:            return(0);
        !           578:        }
        !           579:        x = (int)strlen((char *)r_pkt[j].bf_adr);
        !           580:        sprintf(xbuf,"[%.72s%s]\n",r_pkt[j].bf_adr, x > 72 ? "..." : "");
        !           581:        if (zsout(ZDFILE,xbuf) < 0)  {
        !           582:            deblog = 0;
        !           583:            return(0);
        !           584:        }
        !           585:     }
        !           586:     sprintf(xbuf,"free: %d, winlo: %d\n", rbufnum, winlo);
        !           587:     if (zsout(ZDFILE,xbuf) < 0)  {
        !           588:        deblog = 0;
        !           589:        return(0);
        !           590:     }
        !           591:     return(0);
        !           592: #endif /* DEBUG */
        !           593: }
        !           594: 
        !           595: /*** Some misc functions also moved here from the other ckcfn*.c modules ***/
        !           596: /*** to even out the module sizes. ***/
        !           597: 
        !           598: /* Attribute Packets. */
        !           599: 
        !           600: /*
        !           601:   Call with xp == 0 if we're sending a real file (F packet),
        !           602:   or xp != 0 for screen data (X packet).
        !           603:   Returns 0 on success, -1 on failure.
        !           604: */
        !           605: int
        !           606: sattr(xp) int xp; {                    /* Send Attributes */
        !           607:     int i, j, aln;
        !           608:     char *tp;
        !           609:     struct zattr x;
        !           610: 
        !           611:     if (zsattr(&x) < 0) return(-1);    /* Get attributes or die trying */
        !           612:     if (nxtpkt() < 0) return(-1);      /* Next packet number */
        !           613:     i = 0;                             /* i = Data field character number */
        !           614:     if (atsido) {                      /* System type */
        !           615:        data[i++] = '.';
        !           616:        data[i++] = tochar(x.systemid.len); /*  Copy from attr structure */
        !           617:        for (j = 0; j < x.systemid.len; j++)
        !           618:          data[i++] = x.systemid.val[j];
        !           619:     }
        !           620:     if (attypo) {                      /* File type */
        !           621:        data[i++] = '"';
        !           622:        if (binary) {                   /* Binary  */
        !           623:            data[i++] = tochar(2);      /*  Two characters */
        !           624:            data[i++] = 'B';            /*  B for Binary */
        !           625:            data[i++] = '8';            /*  8-bit bytes (note assumption...) */
        !           626:        } else {                        /* Text */
        !           627:            data[i++] = tochar(3);      /*  Three characters */
        !           628:            data[i++] = 'A';            /*  A = (extended) ASCII with CRLFs */
        !           629:            data[i++] = 'M';            /*  M for carriage return */
        !           630:            data[i++] = 'J';            /*  J for linefeed */
        !           631: 
        !           632: #ifdef NOCSETS
        !           633:            data[i++] = '*';            /* Encoding */
        !           634:            data[i++] = tochar(1);      /* Length of value is 1 */
        !           635:            data[i++] = 'A';            /* A for ASCII */
        !           636: #else
        !           637:            if (tcharset == TC_TRANSP)  /* Transfer character set */
        !           638:              tp = NULL;
        !           639:            else
        !           640:              tp = tcsinfo[tcharset].designator;
        !           641:            if ((tp != NULL) && (aln = (int)strlen(tp)) > 0) {
        !           642:                data[i++] = '*';        /* Encoding */
        !           643:                data[i++] = tochar(aln+1); /*  Length of charset designator. */
        !           644:                data[i++] = 'C';        /*  Text in specified character set. */
        !           645:                for (j = 0; j < aln; j++) /*  Designator from tcsinfo struct */
        !           646:                  data[i++] = *tp++;      /*  Example: *&I6/100 */
        !           647:            }
        !           648: #endif /* NOCSETS */
        !           649:        }
        !           650:     }
        !           651:     if ((xp == 0) && (x.length > -1L)) { /* If it's a real file */
        !           652: 
        !           653:        if (atdato && (aln = x.date.len) > 0) { /* Creation date, if any */
        !           654:            data[i++] = '#';
        !           655:            data[i++] = tochar(aln);
        !           656:            for (j = 0; j < aln; j++)
        !           657:              data[i++] = x.date.val[j];
        !           658:        }
        !           659:        if (atleno) {
        !           660:            data[i] = '!';                      /* File length in K */
        !           661:            sprintf((char *) &data[i+2],"%ld",x.lengthk);
        !           662:            aln = (int)strlen((char *)(data+i+2));
        !           663:            data[i+1] = tochar(aln);
        !           664:            i += aln + 2;
        !           665: 
        !           666:            data[i] = '1';                      /* File length in bytes */
        !           667:            sprintf((char *) &data[i+2],"%ld",x.length);
        !           668:            aln = (int)strlen((char *)(data+i+2));
        !           669:            data[i+1] = tochar(aln);
        !           670:            i += aln + 2;
        !           671:        }
        !           672:        if (atblko && fblksiz) {                /* Blocksize, if set */
        !           673:            data[i] = '(';
        !           674:            sprintf((char *) &data[i+2],"%d",fblksiz);
        !           675:            aln = (int)strlen((char *)(data+i+2));
        !           676:            data[i+1] = tochar(aln);
        !           677:            i += aln + 2;
        !           678:        }
        !           679:     }
        !           680: #ifndef NOFRILLS
        !           681:     if ((rprintf || rmailf) && atdiso) { /* MAIL, or REMOTE PRINT?  */
        !           682:        data[i++] = '+';                /* Disposition */
        !           683:         data[i++] = tochar((int)strlen(optbuf) + 1); /* Options, if any */
        !           684:        if (rprintf)
        !           685:          data[i++] = 'P';              /* P for Print */
        !           686:        else
        !           687:          data[i++] = 'M';              /* M for Mail */
        !           688:        for (j = 0; optbuf[j]; j++)     /* Copy any options */
        !           689:          data[i++] = optbuf[j];
        !           690:     }
        !           691: #endif /* NOFRILLS */
        !           692:     data[i] = '\0';                    /* Make sure it's null-terminated */
        !           693:     aln = (int)strlen((char *)data);   /* Get overall length of attributes */
        !           694: 
        !           695: /* Change this code to break attribute data up into multiple packets! */
        !           696: 
        !           697:     j = (spsiz < 95) ? (92 - bctu) : (spsiz - 2 - bctu);
        !           698:     if (aln > j) {                     /* Check length of result */
        !           699:        spack('A',pktnum,0,(CHAR *)""); /* send an empty attribute packet */
        !           700:        debug(F101,"sattr pkt too long","",aln); /* if too long */
        !           701:        debug(F101,"sattr spsiz","",spsiz);
        !           702:     } else {                           /* Otherwise */
        !           703:        spack('A',pktnum,aln,data);     /* send the real thing. */
        !           704:        debug(F111,"sattr",data,aln);
        !           705:     }
        !           706: 
        !           707:     return(0);
        !           708: }
        !           709: 
        !           710: static char *reason[] = {
        !           711:     "size", "type", "date", "creator", "account", "area", "password",
        !           712:     "blocksize", "access", "encoding", "disposition", "protection",
        !           713:     "protection", "origin", "format", "sys-dependent", "size" };
        !           714: int nreason = sizeof(reason) / sizeof(char *);
        !           715: 
        !           716: int
        !           717: rsattr(s) CHAR *s; {                   /* Read response to attribute packet */
        !           718:     char c, *p;
        !           719:     debug(F111,"rsattr: ",s,*s);
        !           720:     if (*s++ == 'N') {                 /* If it's 'N' followed by anything, */
        !           721:        p = (char *)s;
        !           722:        if (local && ((c = *p++) > SP)) { /* get reason, */
        !           723:            c -= '!';                     /* get offset */
        !           724:            p = ((unsigned int) c <= nreason) ? reason[c] : "reason unknown";
        !           725:        }
        !           726:        screen(SCR_ST,ST_REFU,0L,p);    /* Say other Kermit refused. */
        !           727:        debug(F110,"refused",p,0);
        !           728:        tlog(F110,"refused",p,0L);
        !           729:        return(-1);     
        !           730:     }
        !           731:     return(0);
        !           732: }
        !           733: 
        !           734: int
        !           735: gattr(s, yy) CHAR *s; struct zattr *yy; { /* Read incoming attribute packet */
        !           736:     char c;
        !           737:     int aln, i;
        !           738: #define ABUFL 100                      /* Temporary buffer for conversions */
        !           739:     char abuf[ABUFL];
        !           740: #define FTBUFL 10                      /* File type buffer */
        !           741:     static char ftbuf[FTBUFL];
        !           742: #define DTBUFL 40                      /* File creation date */
        !           743:     static char dtbuf[DTBUFL];
        !           744: #define TSBUFL 10                      /* Transfer syntax */
        !           745:     static char tsbuf[TSBUFL];
        !           746: #define IDBUFL 10                      /* System ID */
        !           747:     static char idbuf[IDBUFL];
        !           748: #ifndef MAC
        !           749: #define DSBUFL 100                     /* Disposition */
        !           750:     static char dsbuf[DSBUFL];
        !           751: #define SPBUFL 512                     /* System-dependent parameters */
        !           752:     static char spbuf[SPBUFL];
        !           753: #else
        !           754: #define DSBUFL 100                     /* Disposition */
        !           755:     static char *dsbuf = NULL;
        !           756: #define SPBUFL 512                     /* System-dependent parameters */
        !           757:     static char *spbuf = 0;
        !           758: #endif /* MAC */
        !           759: #define RPBUFL 20                      /* Attribute reply */
        !           760:     static char rpbuf[RPBUFL];
        !           761: 
        !           762:     char *rp;                          /* Pointer to reply buffer */
        !           763:     int retcode;                       /* Return code */
        !           764: 
        !           765: /* fill in the attributes we have received */
        !           766: 
        !           767:     rp = rpbuf;                                /* Initialize reply buffer */
        !           768:     *rp++ = 'N';                       /* for negative reply. */
        !           769:     retcode = 0;                       /* Initialize return code. */
        !           770: 
        !           771:     while (c = *s++) {                 /* Get attribute tag */
        !           772:        aln = xunchar(*s++);            /* Length of attribute string */
        !           773:        switch (c) {
        !           774:          case '!':                     /* file length in K */
        !           775:            for (i = 0; (i < aln) && (i < ABUFL); i++) /* Copy it */
        !           776:              abuf[i] = *s++;
        !           777:            abuf[i] = '\0';             /* Terminate with null */
        !           778:            if (i < aln) s += (aln - i); /* If field was too long for buffer */
        !           779:            yy->lengthk = atol(abuf);   /* Convert to number */
        !           780:            break;
        !           781: 
        !           782:          case '"':                     /* file type */
        !           783:            for (i = 0; (i < aln) && (i < FTBUFL); i++)
        !           784:              ftbuf[i] = *s++;          /* Copy it into a static string */
        !           785:            ftbuf[i] = '\0';
        !           786:            if (i < aln) s += (aln - i);
        !           787:            if (attypi) {
        !           788:                yy->type.val = ftbuf;   /* Pointer to string */
        !           789:                yy->type.len = i;       /* Length of string */
        !           790:                debug(F101,"gattr file type",tsbuf,i);
        !           791:                if (*ftbuf != 'A' && *ftbuf != 'B') { /* Reject unknown type */
        !           792:                    retcode = -1;
        !           793:                    *rp++ = c;
        !           794:                }               
        !           795:            }
        !           796:            break;
        !           797: 
        !           798:          case '#':                     /* file creation date */
        !           799:            for (i = 0; (i < aln) && (i < DTBUFL); i++)
        !           800:              dtbuf[i] = *s++;          /* Copy it into a static string */
        !           801:            if (i < aln) s += (aln - i);
        !           802:            dtbuf[i] = '\0';
        !           803:            if (atdati) {
        !           804:                yy->date.val = dtbuf;   /* Pointer to string */
        !           805:                yy->date.len = i;       /* Length of string */
        !           806:            }
        !           807:            if (fncact == XYFX_U) {     /* Receiving in update mode? */
        !           808:                if (zstime(filnam,yy,1) > 0) { /* Compare dates */
        !           809:                    discard = 1;        /* If incoming file is older, */
        !           810:                    *rp++ = c;          /* discard it, reason = date. */
        !           811:                    retcode = -1;       /* Rejection notice. */
        !           812:                }
        !           813:            }                           
        !           814:            break;
        !           815: 
        !           816:          case '(':                     /* File Block Size */
        !           817:            for (i = 0; (i < aln) && (i < ABUFL); i++) /* Copy it */
        !           818:              abuf[i] = *s++;
        !           819:            abuf[i] = '\0';             /* Terminate with null */
        !           820:            if (i < aln) s += (aln - i);
        !           821:            if (atblki) {
        !           822:                yy->blksize = atol(abuf); /* Convert to number */
        !           823:            }
        !           824:            break;
        !           825: 
        !           826:          case '*':                     /* encoding (transfer syntax) */
        !           827:            for (i = 0; (i < aln) && (i < TSBUFL); i++)
        !           828:              tsbuf[i] = *s++;          /* Copy it into a static string */
        !           829:            if (i < aln) s += (aln - i);
        !           830:            tsbuf[i] = '\0';
        !           831:            if (atenci) {
        !           832:                yy->encoding.val = tsbuf; /* Pointer to string */
        !           833:                yy->encoding.len = i;   /* Length of string */
        !           834:                debug(F101,"gattr encoding",tsbuf,i);
        !           835:                switch (*tsbuf) {
        !           836: #ifndef NOCSETS
        !           837:                  case 'A':             /* Normal (maybe extended) ASCII */
        !           838:                    tcharset = TC_USASCII; /* Transparent chars untranslated */
        !           839:                    break;
        !           840:                  case 'C':             /* Specified character set */
        !           841:                    for (i = 0; i < ntcsets; i++) { 
        !           842:                        if (!strcmp(tcsinfo[i].designator,tsbuf+1)) break;
        !           843:                    }
        !           844:                    debug(F101,"gattr xfer charset lookup","",i);
        !           845:                    if (i == ntcsets) { /* If unknown character set, */
        !           846:                        debug(F110,"gattr: xfer charset unknown",tsbuf+1,0);
        !           847:                        if (!unkcs) {   /* and SET UNKNOWN DISCARD, */
        !           848:                            retcode = -1; /* reject the file. */
        !           849:                            *rp++ = c;
        !           850:                        }
        !           851:                    } else {
        !           852:                        tcharset = tcsinfo[i].code; /* if known, use it */
        !           853:                        rx = xlr[tcharset][fcharset]; /* xlation function */
        !           854:                    }
        !           855:                    debug(F101,"gattr tcharset","",tcharset);
        !           856:                break;
        !           857: #endif /* NOCSETS */
        !           858:              default:                  /* Something else. */
        !           859:                debug(F110,"gattr unk encoding attribute",tsbuf,0);
        !           860:                if (!unkcs) {           /* If SET UNK DISC */
        !           861:                    retcode = -1;       /* reject the file */
        !           862:                    *rp++ = c;
        !           863:                }
        !           864:                break;
        !           865:                }
        !           866:            }
        !           867:            break;
        !           868: 
        !           869:          case '+':                     /* disposition */
        !           870: #ifdef MAC
        !           871:            if (!dsbuf)
        !           872:                if ((dsbuf = malloc(DSBUFL+1)) == NULL)
        !           873:                    fatal("gtattr: no memory for dsbuf");
        !           874: #endif /* MAC */
        !           875:            for (i = 0; (i < aln) && (i < DSBUFL); i++)
        !           876:              dsbuf[i] = *s++;          /* Copy it into a static string */
        !           877:            dsbuf[i] = '\0';
        !           878:            if (i < aln) s += (aln - i);
        !           879:            if (atdisi) {
        !           880:                yy->disp.val = dsbuf;   /* Pointer to string */
        !           881:                yy->disp.len = i;       /* Length of string */
        !           882:                if (*dsbuf != 'M' && *dsbuf != 'P') {
        !           883:                    retcode = -1;
        !           884:                    *rp++ = c;
        !           885:                }
        !           886:            }
        !           887:            break;
        !           888: 
        !           889:          case '.':                     /* sender's system ID */
        !           890:            for (i = 0; (i < aln) && (i < IDBUFL); i++)
        !           891:              idbuf[i] = *s++;          /* Copy it into a static string */
        !           892:            idbuf[i] = '\0';
        !           893:            if (i < aln) s += (aln - i);
        !           894:            if (atsidi) {
        !           895:                yy->systemid.val = idbuf; /* Pointer to string */
        !           896:                yy->systemid.len = i;   /* Length of string */
        !           897:            }
        !           898:            break;
        !           899: 
        !           900:          case '0':                     /* system-dependent parameters */
        !           901: #ifdef MAC
        !           902:            if (!spbuf && !(spbuf = malloc(SPBUFL)))
        !           903:                fatal("gattr: no memory for spbuf");
        !           904: #endif /* MAC */
        !           905:            for (i = 0; (i < aln) && (i < SPBUFL); i++)
        !           906:              spbuf[i] = *s++;          /* Copy it into a static string */
        !           907:            spbuf[i] = '\0';
        !           908:            if (i < aln) s += (aln - i);
        !           909:            if (atsysi) {
        !           910:                yy->sysparam.val = spbuf; /* Pointer to string */
        !           911:                yy->sysparam.len = i;   /* Length of string */
        !           912:            }
        !           913:            break;
        !           914: 
        !           915:          case '1':                     /* file length in bytes */
        !           916:            for (i = 0; (i < aln) && (i < ABUFL); i++) /* Copy it */
        !           917:              abuf[i] = *s++;
        !           918:            abuf[i] = '\0';             /* Terminate with null */
        !           919:            if (i < aln) s += (aln - i);
        !           920:            yy->length = atol(abuf);    /* Convert to number */
        !           921:            debug(F111,"gattr length",abuf,(int) yy->length);
        !           922:            break;
        !           923: 
        !           924:          default:                      /* Unknown attribute */
        !           925:            s += aln;                   /* Just skip past it */
        !           926:            break;
        !           927:        }
        !           928:     }
        !           929: 
        !           930:     /* Check file length now, because we also need to know the file type */
        !           931:     /* in case zchkspa() differentiates text and binary (VMS version does) */
        !           932: 
        !           933:     if (atleni) {                      /* Length attribute enabled? */
        !           934:        if (yy->length > -1L) {         /* Length-in-bytes attribute rec'd? */
        !           935:            if (!zchkspa(filnam,(yy->length))) { /* Check space */
        !           936:                retcode = -1;
        !           937:                *rp++ = '1';
        !           938:            }
        !           939:        } else if (yy->lengthk > -1L) { /* Length in K attribute rec'd? */
        !           940:            if (!zchkspa(filnam,(yy->lengthk * 1024))) {
        !           941:                retcode = -1;           /* Check space */
        !           942:                *rp++ = '!';
        !           943:            }
        !           944:        }
        !           945:     }
        !           946: 
        !           947:     /* (PWP) show the info */
        !           948:     if (yy->length > 0L) {             /* Let the user know the size */
        !           949:        fsize = yy->length;             
        !           950:        screen(SCR_QE,0,fsize," Size");
        !           951:     } else if (yy->lengthk > 0) {
        !           952:        fsize = yy->lengthk * 1024L;
        !           953:        screen(SCR_QE,0,fsize," Size");
        !           954:     }
        !           955: #ifdef DEBUG
        !           956:     if (deblog) {
        !           957:        sprintf(abuf,"%ld",fsize);
        !           958:        debug(F110,"gattr fsize",abuf,0);
        !           959:     }
        !           960: #endif /* DEBUG */
        !           961:     if (retcode == 0) rp = rpbuf;      /* Null reply string if accepted */
        !           962:     *rp = '\0';                                /* End of reply string */
        !           963:     yy->reply.val = rpbuf;             /* Add it to attribute structure */
        !           964:     yy->reply.len = (int)strlen(rpbuf);
        !           965:     debug(F111,"gattr return",rpbuf,retcode);
        !           966:     return(retcode);
        !           967: }
        !           968: 
        !           969: /*  I N I T A T T R  --  Initialize file attribute structure  */
        !           970: 
        !           971: int
        !           972: initattr(yy) struct zattr *yy; {
        !           973:     yy->lengthk = yy->length = -1L;
        !           974:     yy->type.val = "";
        !           975:     yy->type.len = 0;
        !           976:     yy->date.val = "";
        !           977:     yy->date.len = 0;
        !           978:     yy->encoding.val = "";
        !           979:     yy->encoding.len = 0;
        !           980:     yy->disp.val = "";
        !           981:     yy->disp.len = 0;
        !           982:     yy->systemid.val = "";
        !           983:     yy->systemid.len = 0;
        !           984:     yy->sysparam.val = "";
        !           985:     yy->sysparam.len = 0;
        !           986:     yy->creator.val = "";
        !           987:     yy->creator.len = 0;
        !           988:     yy->account.val = "";
        !           989:     yy->account.len = 0;
        !           990:     yy->area.val = "";
        !           991:     yy->area.len = 0;
        !           992:     yy->passwd.val = "";
        !           993:     yy->passwd.len = 0;
        !           994:     yy->blksize = -1L;
        !           995:     yy->access.val = "";
        !           996:     yy->access.len = 0;
        !           997:     yy->lprotect.val = "";
        !           998:     yy->lprotect.len = 0;
        !           999:     yy->gprotect.val = "";
        !          1000:     yy->gprotect.len = 0;
        !          1001:     yy->recfm.val = "";
        !          1002:     yy->recfm.len = 0;
        !          1003:     yy->reply.val = "";
        !          1004:     yy->reply.len = 0;
        !          1005:     return(0);
        !          1006: }
        !          1007: 
        !          1008: /*  A D E B U -- Write attribute packet info to debug log  */
        !          1009: 
        !          1010: int
        !          1011: adebu(f,zz) char *f; struct zattr *zz; {
        !          1012: #ifdef DEBUG
        !          1013:     if (deblog == 0) return(0);
        !          1014:     debug(F110,"Attributes for incoming file ",f,0);
        !          1015:     debug(F101," length in K","",(int) zz->lengthk);
        !          1016:     debug(F111," file type",zz->type.val,zz->type.len);
        !          1017:     debug(F111," creation date",zz->date.val,zz->date.len);
        !          1018:     debug(F111," creator",zz->creator.val,zz->creator.len);
        !          1019:     debug(F111," account",zz->account.val,zz->account.len);
        !          1020:     debug(F111," area",zz->area.val,zz->area.len);
        !          1021:     debug(F111," password",zz->passwd.val,zz->passwd.len);
        !          1022:     debug(F101," blksize","",(int) zz->blksize);
        !          1023:     debug(F111," access",zz->access.val,zz->access.len);
        !          1024:     debug(F111," encoding",zz->encoding.val,zz->encoding.len);
        !          1025:     debug(F111," disposition",zz->disp.val,zz->disp.len);
        !          1026:     debug(F111," lprotection",zz->lprotect.val,zz->lprotect.len);
        !          1027:     debug(F111," gprotection",zz->gprotect.val,zz->gprotect.len);
        !          1028:     debug(F111," systemid",zz->systemid.val,zz->systemid.len);
        !          1029:     debug(F111," recfm",zz->recfm.val,zz->recfm.len);
        !          1030:     debug(F111," sysparam",zz->sysparam.val,zz->sysparam.len);
        !          1031:     debug(F101," length","",(int) zz->length);
        !          1032:     debug(F110," reply",zz->reply.val,0);
        !          1033: #endif /* DEBUG */
        !          1034:     return(0);
        !          1035: }
        !          1036: 
        !          1037: /*  O P E N A -- Open a file, with attributes.  */
        !          1038: /*
        !          1039:   This function tries to open a new file to put the arriving data in.  The
        !          1040:   filename is the one in the srvcmd buffer.  File collision actions are:
        !          1041:   OVERWRITE (the existing file is overwritten), RENAME (the new file is
        !          1042:   renamed), BACKUP (the existing file is renamed), DISCARD (the new file is
        !          1043:   refused), UPDATE (the incoming file replaces the existing file only if the
        !          1044:   incoming file has a newer creation date).
        !          1045: 
        !          1046:   Returns 0 on failure, nonzero on success.
        !          1047: */
        !          1048: int
        !          1049: opena(f,zz) char *f; struct zattr *zz; {
        !          1050:     int x;
        !          1051:     static struct filinfo fcb;         /* Must be static! */
        !          1052: 
        !          1053:     debug(F111,"opena discard",f,discard);
        !          1054: 
        !          1055:     adebu(f,zz);                       /* Write attributes to debug log */
        !          1056: 
        !          1057:     ffc = 0L;                          /* Init file character counter */
        !          1058: 
        !          1059:     if (bsavef) {                      /* If somehow file mode */
        !          1060:        binary = bsave;                 /* was saved but not restored, */
        !          1061:        bsavef = 0;                     /* restore it. */
        !          1062:        debug(F101,"opena restoring binary","",binary);
        !          1063:     }
        !          1064:     if (zz->type.val[0] == 'A') {      /* Check received attributes */
        !          1065: #ifdef VMS
        !          1066:        if (binary == XYFT_L)           /* Refuse to receive a file in */
        !          1067:          return(0);                    /* labeled mode if sent as text. */
        !          1068: #endif /* VMS */
        !          1069:        bsave = binary;                 /* ASCII.  Save global file type */
        !          1070:        bsavef = 1;                     /* ( restore it in clsof() ) */
        !          1071:        binary = XYFT_T;                /* Set current type to Text. */
        !          1072:        debug(F100,"opena attribute A = text","",binary);
        !          1073:     } else if (zz->type.val[0] == 'B') {
        !          1074:        bsave = binary;                 /* Binary.  Save global file type */
        !          1075:        bsavef = 1;
        !          1076: #ifdef VMS
        !          1077:        if (binary != XYFT_L && binary != XYFT_U) /* Special VMS cases */
        !          1078: #endif /* VMS */
        !          1079:          binary = XYFT_B;
        !          1080:        debug(F101,"opena attribute B = binary","",binary);
        !          1081:     }
        !          1082: 
        !          1083:     /* Set up file control structure */
        !          1084: 
        !          1085:     fcb.bs = fblksiz;                  /* Blocksize */
        !          1086: #ifndef NOCSETS
        !          1087:     fcb.cs = fcharset;                 /* Character set */
        !          1088: #else
        !          1089:     fcb.cs = 0;                                /* Character set */
        !          1090: #endif /* NOCSETS */
        !          1091:     fcb.rl = frecl;                    /* Record Length */
        !          1092:     fcb.fmt = frecfm;                  /* Record Format */
        !          1093:     fcb.org = forg;                    /* Organization */
        !          1094:     fcb.cc = fcctrl;                   /* Carriage control */
        !          1095:     fcb.typ = binary;                  /* Type */
        !          1096:     fcb.dsp = (fncact == XYFX_A) ? XYFZ_A : XYFZ_N; /* Disposition */
        !          1097:     fcb.os_specific = '\0';            /* OS specific info */
        !          1098: #ifdef VMS
        !          1099:     fcb.lblopts = lf_opts;             /* VMS Labeled file options */
        !          1100: #else
        !          1101:     fcb.lblopts = 0;
        !          1102: #endif /* VMS */
        !          1103: 
        !          1104:     if (x = openo(f,zz,&fcb)) {                /* Try to open the file. */
        !          1105:        tlog(F110," as",f,0L);          /* OK, open, record name. */
        !          1106:        if (binary) {                   /* Log file mode in transaction log */
        !          1107:            tlog(F101," mode: binary","",(long) binary);
        !          1108:        } else {                        /* If text mode, check character set */
        !          1109:            tlog(F100," mode: text","",0L);
        !          1110: #ifndef NOCSETS
        !          1111:            tlog(F110," file character set",fcsinfo[fcharset].name,0L);
        !          1112:            if (tcharset == TC_TRANSP)
        !          1113:              tlog(F110," xfer character set","transparent",0L);
        !          1114:            else
        !          1115:              tlog(F110," xfer character set",tcsinfo[tcharset].name,0L);
        !          1116: #endif /* NOCSETS */
        !          1117:            debug(F111," opena charset",zz->encoding.val,zz->encoding.len);
        !          1118:        }
        !          1119:        screen(SCR_AN,0,0l,f);
        !          1120:        intmsg(filcnt);
        !          1121: 
        !          1122: #ifdef datageneral
        !          1123: /* Need to turn on multi-tasking console interrupt task here, since multiple */
        !          1124: /* files may be received. */
        !          1125:         if ((local) && (!quiet))        /* Only do this if local & not quiet */
        !          1126:             consta_mt();                /* Start the asynch read task */
        !          1127: #endif
        !          1128: 
        !          1129:     } else {                           /* Did not open file OK. */
        !          1130:         tlog(F110,"Failure to open",f,0L);
        !          1131:        screen(SCR_EM,0,0l,"Can't open file");
        !          1132:     }
        !          1133:     return(x);                         /* Pass on return code from openo */
        !          1134: }
        !          1135: 
        !          1136: /*  C A N N E D  --  Check if current file transfer cancelled */
        !          1137: 
        !          1138: int
        !          1139: canned(buf) CHAR *buf; {
        !          1140:     if (*buf == 'X') cxseen = 1;
        !          1141:     if (*buf == 'Z') czseen = 1;
        !          1142:     debug(F101,"canned: cxseen","",cxseen);
        !          1143:     debug(F101," czseen","",czseen);
        !          1144:     return((czseen || cxseen) ? 1 : 0);
        !          1145: }
        !          1146: 
        !          1147: 
        !          1148: /*  O P E N I  --  Open an existing file for input  */
        !          1149: 
        !          1150: int
        !          1151: openi(name) char *name; {
        !          1152:     int x, filno;
        !          1153:     char *name2;
        !          1154: 
        !          1155:     if (memstr) return(1);             /* Just return if file is memory. */
        !          1156: 
        !          1157:     debug(F110,"openi",name,0);
        !          1158:     debug(F101," sndsrc","",sndsrc);
        !          1159: 
        !          1160:     filno = (sndsrc == 0) ? ZSTDIO : ZIFILE;    /* ... */
        !          1161: 
        !          1162:     debug(F101," file number","",filno);
        !          1163: 
        !          1164:     if (server && !en_cwd) {           /* If running as server */
        !          1165:        zstrip(name,&name2);            /* and CWD is disabled, */
        !          1166:        if (strcmp(name,name2)) {       /* check if pathname was included. */
        !          1167:            tlog(F110,name,"authorization failure",0L);
        !          1168:            debug(F110," openi authorization failure",name,0);
        !          1169:            return(0);
        !          1170:        } else name = name2;
        !          1171:     }
        !          1172:     if (zopeni(filno,name)) {          /* Otherwise, try to open it. */
        !          1173:        debug(F110," ok",name,0);
        !          1174:        return(1);
        !          1175:     } else {                           /* If not found, */
        !          1176:        char xname[100];                /* convert the name */
        !          1177:        zrtol(name,xname);              /* to local form and then */
        !          1178:        x = zopeni(filno,xname);        /* try opening it again. */
        !          1179:        debug(F101," zopeni","",x);
        !          1180:        if (x) {
        !          1181:            debug(F110," ok",xname,0);
        !          1182:            return(1);                  /* It worked. */
        !          1183:         } else {
        !          1184:            screen(SCR_EM,0,0l,"Can't open file");  /* It didn't work. */
        !          1185:            tlog(F110,xname,"could not be opened",0L);
        !          1186:            debug(F110," openi failed",xname,0);
        !          1187:            return(0);
        !          1188:         }
        !          1189:     }
        !          1190: }
        !          1191: 
        !          1192: /*  O P E N O  --  Open a new file for output.  */
        !          1193: 
        !          1194: int
        !          1195: openo(name,zz,fcb) char *name; struct zattr *zz; struct filinfo *fcb; {
        !          1196:     char *name2;
        !          1197: 
        !          1198:     if (stdouf)                                /* Receiving to stdout? */
        !          1199:       return(zopeno(ZSTDIO,"",zz,NULL));
        !          1200: 
        !          1201:     debug(F110,"openo: name",name,0);
        !          1202: 
        !          1203:     if (cxseen || czseen || discard) { /* If interrupted, get out before */
        !          1204:        debug(F100," open cancelled","",0); /* destroying existing file. */
        !          1205:        return(1);                      /* Pretend to succeed. */
        !          1206:     }
        !          1207:     if (server && !en_cwd) {           /* If running as server */
        !          1208:        zstrip(name,&name2);            /* and CWD is disabled, */
        !          1209:        if (strcmp(name,name2)) {       /* check if pathname was included. */
        !          1210:            tlog(F110,name,"authorization failure",0L);
        !          1211:            debug(F110," openo authorization failure",name,0);
        !          1212:            return(0);
        !          1213:        } else name = name2;
        !          1214:     }
        !          1215: 
        !          1216:     if (zopeno(ZOFILE,name,zz,fcb) == 0) { /* Try to open the file */
        !          1217:        debug(F110,"openo failed",name,0);
        !          1218:        tlog(F110,"Failure to open",name,0L);
        !          1219:        return(0);
        !          1220:     } else {
        !          1221:        debug(F110,"openo ok, name",name,0);
        !          1222:        return(1);
        !          1223:     }
        !          1224: }
        !          1225: 
        !          1226: /*  O P E N T  --  Open the terminal for output, in place of a file  */
        !          1227: 
        !          1228: int
        !          1229: opent(zz) struct zattr *zz; {
        !          1230:     ffc = tfc = 0L;
        !          1231:     return(zopeno(ZCTERM,"",zz,NULL));
        !          1232: }
        !          1233: 
        !          1234: /*  C L S I F  --  Close the current input file. */
        !          1235: 
        !          1236: int
        !          1237: clsif() {
        !          1238:     int x = 0;
        !          1239: #ifdef datageneral
        !          1240:     if ((local) && (!quiet))    /* Only do this if local & not quiet */
        !          1241:         if (nfils < 1)          /* More files to send ... leave it on! */
        !          1242:             connoi_mt();
        !          1243: #endif /* datageneral */
        !          1244:     if (memstr) {                      /* If input was memory string, */
        !          1245:        memstr = 0;                     /* indicate no more. */
        !          1246:     } else x = zclose(ZIFILE);         /* else close input file. */
        !          1247:     if (czseen || cxseen) 
        !          1248:        screen(SCR_ST,ST_DISC,0l,"");
        !          1249:     else
        !          1250:        screen(SCR_ST,ST_OK,0l,"");
        !          1251:     hcflg = 0;                         /* Reset flags, */
        !          1252:     *filnam = '\0';                    /* and current file name */
        !          1253:     return(x);
        !          1254: }
        !          1255: 
        !          1256: 
        !          1257: /*  C L S O F  --  Close an output file.  */
        !          1258: 
        !          1259: /*  Call with disp != 0 if file is to be discarded.  */
        !          1260: /*  Returns -1 upon failure to close, 0 or greater on success. */
        !          1261: 
        !          1262: int
        !          1263: clsof(disp) int disp; {
        !          1264:     int x;
        !          1265: 
        !          1266:     debug(F101,"clsof disp","",disp);
        !          1267:     if (bsavef) {                      /* If we saved global file type */
        !          1268:        debug(F101,"clsof restoring binary","",binary);
        !          1269:        binary = bsave;                 /* restore it */
        !          1270:        bsavef = 0;                     /* only this once. */
        !          1271:     }
        !          1272: #ifdef datageneral
        !          1273:     if ((local) && (!quiet))           /* Only do this if local & not quiet */
        !          1274:         connoi_mt();
        !          1275: #endif
        !          1276:     if ((x = zclose(ZOFILE)) < 0) {    /* Try to close the file */
        !          1277:        tlog(F100,"Failure to close",filnam,0L);
        !          1278:        screen(SCR_ST,ST_ERR,0l,"");
        !          1279:     } else if (disp && (keep == 0)) {  /* Delete it if interrupted, */
        !          1280:        if (*filnam) zdelet(filnam);    /* and not keeping incomplete files */
        !          1281:        debug(F100,"Discarded","",0);
        !          1282:        tlog(F100,"Discarded","",0L);
        !          1283:        screen(SCR_ST,ST_DISC,0l,"");
        !          1284:     } else {                           /* Nothing wrong, just keep it */
        !          1285:        debug(F100,"Closed","",0);      /* and give comforting messages. */
        !          1286:        screen(SCR_ST,ST_OK,0l,"");
        !          1287:     }
        !          1288:     return(x);                         /* Send back zclose() return code. */
        !          1289: }
        !          1290: 
        !          1291: #ifdef SUNOS4S5
        !          1292: tolower(c) char c; { return((c)-'A'+'a'); }
        !          1293: toupper(c) char c; { return((c)-'a'+'A'); }
        !          1294: #endif /* SUNOS4S5 */
        !          1295: 

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