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C/C++ Source or Header  |  1996-10-11  |  87.4 KB  |  2,043 lines
  1. /*=============================================================================
  2.  
  3.                               HydraCom Version 1.00
  4.  
  5.                          A sample implementation of the
  6.                    HYDRA Bi-Directional File Transfer Protocol
  7.  
  8.                              HydraCom was written by
  9.                    Arjen G. Lentz, LENTZ SOFTWARE-DEVELOPMENT
  10.                   COPYRIGHT (C) 1991-1993; ALL RIGHTS RESERVED
  11.  
  12.                        The HYDRA protocol was designed by
  13.                  Arjen G. Lentz, LENTZ SOFTWARE-DEVELOPMENT and
  14.                              Joaquim H. Homrighausen
  15.                   COPYRIGHT (C) 1991-1993; ALL RIGHTS RESERVED
  16.  
  17.  
  18.   Revision history:
  19.   06 Sep 1991 - (AGL) First tryout
  20.   .. ... .... - Internal development
  21.   11 Jan 1993 - HydraCom version 1.00, Hydra revision 001 (01 Dec 1992)
  22.  
  23.  
  24.   For complete details of the Hydra and HydraCom licensing restrictions,
  25.   please refer to the license agreements which are published in their entirety
  26.   in HYDRACOM.C and LICENSE.DOC, and also contained in the documentation file
  27.   HYDRACOM.DOC
  28.  
  29.   Use of this file is subject to the restrictions contained in the Hydra and
  30.   HydraCom licensing agreements. If you do not find the text of this agreement
  31.   in any of the aforementioned files, or if you do not have these files, you
  32.   should immediately contact LENTZ SOFTWARE-DEVELOPMENT and/or Joaquim
  33.   Homrighausen at one of the addresses listed below. In no event should you
  34.   proceed to use this file without having accepted the terms of the Hydra and
  35.   HydraCom licensing agreements, or such other agreement as you are able to
  36.   reach with LENTZ SOFTWARE-DEVELOMENT and Joaquim Homrighausen.
  37.  
  38.  
  39.   Hydra protocol design and HydraCom driver:         Hydra protocol design:
  40.   Arjen G. Lentz                                     Joaquim H. Homrighausen
  41.   LENTZ SOFTWARE-DEVELOPMENT                         389, route d'Arlon
  42.   Langegracht 7B                                     L-8011 Strassen
  43.   3811 BT  Amersfoort                                Luxembourg
  44.   The Netherlands
  45.   FidoNet 2:283/512, AINEX-BBS +31-33-633916         FidoNet 2:270/17
  46.   arjen_lentz@f512.n283.z2.fidonet.org               joho@ae.lu
  47.  
  48.   Please feel free to contact us at any time to share your comments about our
  49.   software and/or licensing policies.
  50.  
  51. =============================================================================*/
  52.  
  53. #include "hydracom.h"                             /* need 2types.h & hydra.h */
  54.  
  55. #ifdef AMIGA
  56. #include <dos/dos.h>
  57. #include <clib/dos_protos.h>
  58. #endif    /* AMIGA */
  59.  
  60. #define H_DEBUG 1
  61.  
  62. #ifdef AMIGA        /* OLSEN */
  63. #define FNAMELEN 31
  64. #else
  65. #define FNAMELEN 13
  66. #endif    /* AMIGA */
  67.  
  68. /* HYDRA Some stuff to aid readability of the source and prevent typos ----- */
  69. #define h_updcrc16(crc,c)  (crc16tab[(       crc ^ (c)) & 0xff] ^ ((crc >> 8) & 0x00ff))
  70. #define h_updcrc32(crc,c)  (crc32tab[((byte) crc ^ (c)) & 0xff] ^ ((crc >> 8) & 0x00ffffffL))
  71. #define h_crc16poly        (0x8408)
  72. #define h_crc32poly        (0xedb88320L)
  73. #define h_crc16test(crc)   (((crc) == 0xf0b8     ) ? 1 : 0)
  74. #define h_crc32test(crc)   (((crc) == 0xdebb20e3L) ? 1 : 0)
  75. #define h_uuenc(c)         (((c) & 0x3f) + '!')
  76. #define h_uudec(c)         (((c) - '!') & 0x3f)
  77. #define h_long1(buf)       (*((long *) (buf)))
  78. #define h_long2(buf)       (*((long *) ((buf) + ((int) sizeof (long)))))
  79. #define h_long3(buf)       (*((long *) ((buf) + (2 * ((int) sizeof (long))))))
  80. typedef long               h_timer;
  81. #define h_timer_set(t)     (time(NULL) + (t))
  82. #define h_timer_running(t) (t != 0L)
  83. #define h_timer_expired(t) (time(NULL) > (t))
  84. #define h_timer_reset()    (0L)
  85.  
  86.  
  87. /* HYDRA's memory ---------------------------------------------------------- */
  88. static  boolean originator;                     /* are we the orig side?     */
  89. static  int     batchesdone;                    /* No. HYDRA batches done    */
  90. static  boolean hdxlink;                        /* hdx link & not orig side  */
  91. static  dword   options;                        /* INIT options hydra_init() */
  92. #ifdef AMIGA
  93. static  long    timeout;                        /* general timeout in secs   */
  94.         long    max_retries = H_RETRIES;        /* maximum number of retries */
  95. #else
  96. static  word    timeout;                        /* general timeout in secs   */
  97. #endif
  98. static  char    abortstr[] = { 24,24,24,24,24,24,24,24,8,8,8,8,8,8,8,8,8,8,0 };
  99. static  char   *hdxmsg     = "Fallback to one-way xfer";
  100. static  char   *pktprefix  = "";
  101. static  char   *autostr    = "hydra\r";
  102. static  word   *crc16tab;                       /* CRC-16 table              */
  103. static  dword  *crc32tab;                       /* CRC-32 table              */
  104.  
  105. static  byte   *txbuf,         *rxbuf;          /* packet buffers            */
  106. static  dword   txoptions,      rxoptions;      /* HYDRA options (INIT seq)  */
  107. static  char    txpktprefix[H_PKTPREFIX + 1];   /* pkt prefix str they want  */
  108. static  long    txwindow,       rxwindow;       /* window size (0=streaming) */
  109. static  h_timer                 braindead;      /* braindead timer           */
  110. static  byte   *txbufin;                        /* read data from disk here  */
  111. static  byte    txlastc;                        /* last byte put in txbuf    */
  112. static  byte                    rxdle;          /* count of received H_DLEs  */
  113. static  byte                    rxpktformat;    /* format of pkt receiving   */
  114. static  byte                   *rxbufptr;       /* current position in rxbuf */
  115. static  byte                   *rxbufmax;       /* highwatermark of rxbuf    */
  116. static  char    txfname[FNAMELEN],    rxfname[FNAMELEN];    /* fname of current files   */ /* OLSEN */
  117. static  char                   *rxpathname;     /* pointer to rx pathname    */
  118. static  long    txftime,        rxftime;        /* file timestamp (UNIX)     */
  119. static  long    txfsize,        rxfsize;        /* file length               */
  120. static  int     txfd,           rxfd;           /* file handles              */
  121. static  word                    rxpktlen;       /* length of last packet     */
  122. static  word                    rxblklen;       /* len of last good data blk */
  123. static  byte    txstate,        rxstate;        /* xmit/recv states          */
  124. static  long    txpos,          rxpos;          /* current position in files */
  125. static  word    txblklen;                       /* length of last block sent */
  126. #ifdef AMIGA
  127. static  long    txmaxblklen;                    /* max block length allowed  */
  128. #else
  129. static  word    txmaxblklen;                    /* max block length allowed  */
  130. #endif
  131. static  long    txlastack;                      /* last dataack received     */
  132. static  long    txstart,        rxstart;        /* time we started this file */
  133. static  long    txoffset,       rxoffset;       /* offset in file we begun   */
  134. static  h_timer txtimer,        rxtimer;        /* retry timers              */
  135. static  word    txretries,      rxretries;      /* retry counters            */
  136. static  long                    rxlastsync;     /* filepos last sync retry   */
  137. static  long    txsyncid,       rxsyncid;       /* id of last resync         */
  138. static  word    txgoodneeded;                   /* to send before larger blk */
  139. static  word    txgoodbytes;                    /* no. sent at this blk size */
  140.  
  141. struct _h_flags {
  142.         char  *str;
  143.         dword  val;
  144. };
  145.  
  146. static struct _h_flags h_flags[] = {
  147.         { "XON", HOPT_XONXOFF },
  148.         { "TLN", HOPT_TELENET },
  149.         { "CTL", HOPT_CTLCHRS },
  150.         { "HIC", HOPT_HIGHCTL },
  151.         { "HI8", HOPT_HIGHBIT },
  152.         { "BRK", HOPT_CANBRK  },
  153.         { "ASC", HOPT_CANASC  },
  154.         { "UUE", HOPT_CANUUE  },
  155.         { "C32", HOPT_CRC32   },
  156.         { "DEV", HOPT_DEVICE  },
  157.         { "FPT", HOPT_FPT     },
  158.         { NULL , 0x0L         }
  159. };
  160.  
  161.  
  162. /*---------------------------------------------------------------------------*/
  163. static void hydra_msgdev (byte *data, word len)
  164. {       /* text is already NUL terminated by calling func hydra_devrecv() */
  165.         len = len;
  166.         message(3,"*HMSGDEV: %s",data);
  167. }/*hydra_msgdev()*/
  168.  
  169.  
  170. /*---------------------------------------------------------------------------*/
  171. static  word    devtxstate;                     /* dev xmit state            */
  172. static  h_timer devtxtimer;                     /* dev xmit retry timer      */
  173. static  word    devtxretries;                   /* dev xmit retry counter    */
  174. static  long    devtxid,        devrxid;        /* id of last devdata pkt    */
  175. static  char    devtxdev[H_FLAGLEN + 1];        /* xmit device ident flag    */
  176. static  byte   *devtxbuf;                       /* ptr to usersupplied dbuf  */
  177. static  word    devtxlen;                       /* len of data in xmit buf   */
  178.  
  179. struct _h_dev {
  180.         char  *dev;
  181.         void (*func) (byte *data, word len);
  182. };
  183.  
  184. static  struct _h_dev h_dev[] = {
  185.         { "MSG", hydra_msgdev },                /* internal protocol msg     */
  186.         { "CON", NULL         },                /* text to console (chat)    */
  187.         { "PRN", NULL         },                /* data to printer           */
  188.         { "ERR", NULL         },                /* text to error output      */
  189.         { NULL , NULL         }
  190. };
  191.  
  192.  
  193. /*---------------------------------------------------------------------------*/
  194. boolean hydra_devfree (void)
  195. {
  196.         if (devtxstate || !(txoptions & HOPT_DEVICE) || txstate >= HTX_END)
  197.            return (false);                      /* busy or not allowed       */
  198.         else
  199.            return (true);                       /* allowed to send a new pkt */
  200. }/*hydra_devfree()*/
  201.  
  202.  
  203. /*---------------------------------------------------------------------------*/
  204. boolean hydra_devsend (char *dev, byte *data, word len)
  205. {
  206.         if (!dev || !data || !len || !hydra_devfree())
  207.            return (false);
  208.  
  209.         strncpy(devtxdev,dev,H_FLAGLEN);
  210.         devtxdev[H_FLAGLEN] = '\0';
  211. #ifndef AMIGA
  212.         strupr(devtxdev);
  213. #endif    /* AMIGA */
  214.         devtxbuf = data;
  215.         devtxlen = (len > H_MAXBLKLEN) ? H_MAXBLKLEN : len;
  216.  
  217.         devtxid++;
  218.         devtxtimer   = h_timer_reset();
  219.         devtxretries = 0;
  220.         devtxstate   = HTD_DATA;
  221.  
  222.         /* special for chat, only prolong life if our side keeps typing! */
  223.         if (chattimer > 0L && !strcmp(devtxdev,"CON") && txstate == HTX_REND)
  224.            braindead = h_timer_set(H_BRAINDEAD);
  225.  
  226.         return (true);
  227. }/*hydra_devsend()*/
  228.  
  229.  
  230. /*---------------------------------------------------------------------------*/
  231. boolean hydra_devfunc (char *dev, void (*func) (byte *data, word len))
  232. {
  233.         register int i;
  234.  
  235.         for (i = 0; h_dev[i].dev; i++) {
  236.             if (!strnicmp(dev,h_dev[i].dev,H_FLAGLEN)) {
  237.                h_dev[i].func = func;
  238.                return (true);
  239.             }
  240.         }
  241.  
  242.         return (false);
  243. }/*hydra_devfunc()*/
  244.  
  245.  
  246. /*---------------------------------------------------------------------------*/
  247. static void hydra_devrecv (void)
  248. {
  249.         register char *p = (char *) rxbuf;
  250.         register int   i;
  251.         word len = rxpktlen;
  252.  
  253.         p += (int) sizeof (long);                       /* skip the id long  */
  254.         len -= (int) sizeof (long);
  255.         for (i = 0; h_dev[i].dev; i++) {                /* walk through devs */
  256.             if (!strncmp(p,h_dev[i].dev,H_FLAGLEN)) {
  257.                if (h_dev[i].func) {
  258.                   len -= ((int) strlen(p)) + 1;         /* sub devstr len    */
  259.                   p += ((int) strlen(p)) + 1;           /* skip devtag       */
  260.                   p[len] = '\0';                        /* NUL terminate     */
  261.                   (*h_dev[i].func)((byte *) p,len);     /* call output func  */
  262.                }
  263.                break;
  264.             }
  265.         }
  266. }/*hydra_devrecv()*/
  267.  
  268.  
  269. /*---------------------------------------------------------------------------*/
  270. static void put_flags (char *buf, struct _h_flags flags[], long val)
  271. {
  272.         register char *p;
  273.         register int   i;
  274.  
  275.         p = buf;
  276.         for (i = 0; flags[i].val; i++) {
  277.             if (val & flags[i].val) {
  278.                if (p > buf) *p++ = ',';
  279.                strcpy(p,flags[i].str);
  280.                p += H_FLAGLEN;
  281.             }
  282.         }
  283.         *p = '\0';
  284. }/*put_flags()*/
  285.  
  286.  
  287. /*---------------------------------------------------------------------------*/
  288. static dword get_flags (char *buf, struct _h_flags flags[])
  289. {
  290.         register dword  val;
  291.         register char  *p;
  292.         register int    i;
  293.  
  294.         val = 0x0L;
  295.         for (p = strtok(buf,","); p; p = strtok(NULL,",")) {
  296.             for (i = 0; flags[i].val; i++) {
  297.                 if (!strcmp(p,flags[i].str)) {
  298.                    val |= flags[i].val;
  299.                    break;
  300.                 }
  301.             }
  302.         }
  303.  
  304.         return (val);
  305. }/*get_flags()*/
  306.  
  307.  
  308. /*---------------------------------------------------------------------------*/
  309. static word crc16block (register byte *buf, register word len)
  310. {
  311.         register word crc;
  312.  
  313.         for (crc = 0xffff; len > 0; len--)
  314.             crc = h_updcrc16(crc,*buf++);
  315.         return (crc);
  316. }/*crc16block()*/
  317.  
  318.  
  319. /*---------------------------------------------------------------------------*/
  320. static dword crc32block (register byte *buf, register word len)
  321. {
  322.         register dword crc;
  323.  
  324.         for (crc = 0xffffffffL; len > 0; len--)
  325.             crc = h_updcrc32(crc,*buf++);
  326.         return (crc);
  327. }/*crc32block()*/
  328.  
  329.  
  330. /*---------------------------------------------------------------------------*/
  331. static byte *put_binbyte (register byte *p, register byte c)
  332. {
  333.         register byte n;
  334.  
  335.         n = c;
  336.         if (txoptions & HOPT_HIGHCTL)
  337.            n &= 0x7f;
  338.  
  339.         if (n == H_DLE ||
  340.             ((txoptions & HOPT_XONXOFF) && (n == XON || n == XOFF)) ||
  341.             ((txoptions & HOPT_TELENET) && n == '\r' && txlastc == '@') ||
  342.             ((txoptions & HOPT_CTLCHRS) && (n < 32 || n == 127))) {
  343.            *p++ = H_DLE;
  344.            c ^= 0x40;
  345.         }
  346.  
  347.         *p++ = c;
  348.         txlastc = n;
  349.  
  350.         return (p);
  351. }/*put_binbyte()*/
  352.  
  353.  
  354. /*---------------------------------------------------------------------------*/
  355. static void txpkt (register word len, int type)
  356. {
  357.         register byte *in, *out;
  358.         register word  c, n;
  359.         boolean crc32 = false;
  360.         byte    format;
  361.         static char hexdigit[] = "0123456789abcdef";
  362.  
  363.         txbufin[len++] = type;
  364.  
  365.         switch (type) {
  366.                case HPKT_START:
  367.                case HPKT_INIT:
  368.                case HPKT_INITACK:
  369.                case HPKT_END:
  370.                case HPKT_IDLE:
  371.                     format = HCHR_HEXPKT;
  372.                     break;
  373.  
  374.                default:
  375.                     /* COULD do smart format selection depending on data and options! */
  376.                     if (txoptions & HOPT_HIGHBIT) {
  377.                        if ((txoptions & HOPT_CTLCHRS) && (txoptions & HOPT_CANUUE))
  378.                           format = HCHR_UUEPKT;
  379.                        else if (txoptions & HOPT_CANASC)
  380.                           format = HCHR_ASCPKT;
  381.                        else
  382.                           format = HCHR_HEXPKT;
  383.                     }
  384.                     else
  385.                        format = HCHR_BINPKT;
  386.                     break;
  387.         }
  388.  
  389.         if (format != HCHR_HEXPKT && (txoptions & HOPT_CRC32))
  390.            crc32 = true;
  391.  
  392. #if H_DEBUG
  393. if (loglevel==0) {
  394.    char *s1, *s2, *s3, *s4;
  395.  
  396.    message(0," -> PKT (format='%c'  type='%c'  crc=%d  len=%d)",
  397.              format, type, crc32 ? 32 : 16, len - 1);
  398.  
  399.    switch (type) {
  400.           case HPKT_START:    message(0,"    <autostr>START");
  401.                               break;
  402.           case HPKT_INIT:     s1 = ((char *) txbufin) + ((int) strlen((char *) txbufin)) + 1;
  403.                               s2 = s1 + ((int) strlen(s1)) + 1;
  404.                               s3 = s2 + ((int) strlen(s2)) + 1;
  405.                               s4 = s3 + ((int) strlen(s3)) + 1;
  406.                               message(0,"    INIT (appinfo='%s'  can='%s'  want='%s'  options='%s'  pktprefix='%s')",
  407.                                       (char *) txbufin, s1, s2, s3, s4);
  408.                               break;
  409.           case HPKT_INITACK:  message(0,"    INITACK");
  410.                               break;
  411.           case HPKT_FINFO:    message(0,"    FINFO (%s)",txbufin);
  412.                               break;
  413.           case HPKT_FINFOACK: if (rxfd >= 0) {
  414.                                  if (rxpos > 0L) s1 = "RES";
  415.                                  else            s1 = "BOF";
  416.                               }
  417.                               else if (rxpos == -1L) s1 = "HAVE";
  418.                               else if (rxpos == -2L) s1 = "SKIP";
  419.                               else                   s1 = "EOB";
  420.                               message(0,"    FINFOACK (pos=%ld %s  rxstate=%d  rxfd=%d)",
  421.                                       rxpos,s1,rxstate,rxfd);
  422.                               break;
  423.           case HPKT_DATA:     message(0,"    DATA (ofs=%ld  len=%d)",
  424.                                       intell(h_long1(txbufin)), len - 5);
  425.                               break;
  426.           case HPKT_DATAACK:  message(0,"    DATAACK (ofs=%ld)",
  427.                                       intell(h_long1(txbufin)));
  428.                               break;
  429.           case HPKT_RPOS:     message(0,"    RPOS (pos=%ld%s  blklen=%ld  syncid=%ld)",
  430.                                       rxpos, rxpos < 0L ? " SKIP" : "",
  431.                                       intell(h_long2(txbufin)), rxsyncid);
  432.                               break;
  433.           case HPKT_EOF:      message(0,"    EOF (ofs=%ld%s)",
  434.                                       txpos, txpos < 0L ? " SKIP" : "");
  435.                               break;
  436.           case HPKT_EOFACK:   message(0,"    EOFACK");
  437.                               break;
  438.           case HPKT_IDLE:     message(0,"    IDLE");
  439.                               break;
  440.           case HPKT_END:      message(0,"    END");
  441.                               break;
  442.           case HPKT_DEVDATA:  message(0,"    DEVDATA (id=%ld  dev='%s'  len=%u)",
  443.                                       devtxid, devtxdev, devtxlen);
  444.                               break;
  445.           case HPKT_DEVDACK:  message(0,"    DEVDACK (id=%ld)",
  446.                                       intell(h_long1(rxbuf)));
  447.                               break;
  448.           default:            /* This couldn't possibly happen! ;-) */
  449.                               break;
  450.    }
  451. }
  452. #endif
  453.  
  454.         if (crc32) {
  455.            dword crc = ~crc32block(txbufin,len);
  456.  
  457.            txbufin[len++] = crc;
  458.            txbufin[len++] = crc >> 8;
  459.            txbufin[len++] = crc >> 16;
  460.            txbufin[len++] = crc >> 24;
  461.         }
  462.         else {
  463.            word crc = ~crc16block(txbufin,len);
  464.  
  465.            txbufin[len++] = crc;
  466.            txbufin[len++] = crc >> 8;
  467.         }
  468.  
  469.         in = txbufin;
  470.         out = txbuf;
  471.         txlastc = 0;
  472.         *out++ = H_DLE;
  473.         *out++ = format;
  474.  
  475.         switch (format) {
  476.                case HCHR_HEXPKT:
  477.                     for (; len > 0; len--, in++) {
  478.                         if (*in & 0x80) {
  479.                            *out++ = '\\';
  480.                            *out++ = hexdigit[((*in) >> 4) & 0x0f];
  481.                            *out++ = hexdigit[(*in) & 0x0f];
  482.                         }
  483.                         else if (*in < 32 || *in == 127) {
  484.                            *out++ = H_DLE;
  485.                            *out++ = (*in) ^ 0x40;
  486.                         }
  487.                         else if (*in == '\\') {
  488.                            *out++ = '\\';
  489.                            *out++ = '\\';
  490.                         }
  491.                         else
  492.                            *out++ = *in;
  493.                     }
  494.                     break;
  495.  
  496.                case HCHR_BINPKT:
  497.                     for (; len > 0; len--)
  498.                         out = put_binbyte(out,*in++);
  499.                     break;
  500.  
  501.                case HCHR_ASCPKT:
  502.                     for (n = c = 0; len > 0; len--) {
  503.                         c |= ((*in++) << n);
  504.                         out = put_binbyte(out,c & 0x7f);
  505.                         c >>= 7;
  506.                         if (++n >= 7) {
  507.                            out = put_binbyte(out,c & 0x7f);
  508.                            n = c = 0;
  509.                         }
  510.                     }
  511.                     if (n > 0)
  512.                        out = put_binbyte(out,c & 0x7f);
  513.                     break;
  514.  
  515.                case HCHR_UUEPKT:
  516.                     for ( ; len >= 3; in += 3, len -= 3) {
  517.                         *out++ = h_uuenc(in[0] >> 2);
  518.                         *out++ = h_uuenc(((in[0] << 4) & 0x30) | ((in[1] >> 4) & 0x0f));
  519.                         *out++ = h_uuenc(((in[1] << 2) & 0x3c) | ((in[2] >> 6) & 0x03));
  520.                         *out++ = h_uuenc(in[2] & 0x3f);
  521.                     }
  522.                     if (len > 0) {
  523.                        *out++ = h_uuenc(in[0] >> 2);
  524.                        *out++ = h_uuenc(((in[0] << 4) & 0x30) | ((in[1] >> 4) & 0x0f));
  525.                        if (len == 2)
  526.                           *out++ = h_uuenc((in[1] << 2) & 0x3c);
  527.                     }
  528.                     break;
  529.         }
  530.  
  531.         *out++ = H_DLE;
  532.         *out++ = HCHR_PKTEND;
  533.  
  534.         if (type != HPKT_DATA && format != HCHR_BINPKT) {
  535.            *out++ = '\r';
  536.            *out++ = '\n';
  537.         }
  538.  
  539.         for (in = (byte *) txpktprefix; *in; in++) {
  540.             switch (*in) {
  541.                    case 221: /* transmit break signal for one second */
  542.                              break;
  543.                    case 222: { h_timer t = h_timer_set(2);
  544.                                while (!h_timer_expired(t))
  545.                                      sys_idle();
  546.                              }
  547.                              break;
  548.                    case 223: com_putbyte(0);
  549.                              break;
  550.                    default:  com_putbyte(*in);
  551.                              break;
  552.             }
  553.         }
  554.  
  555.         com_putblock(txbuf,(word) (out - txbuf));
  556. }/*txpkt()*/
  557.  
  558.  
  559. /*---------------------------------------------------------------------------*/
  560. static int rxpkt (void)
  561. {
  562.         register byte *p, *q;
  563.         register int   c, n, i;
  564.  
  565.         if (keyabort())
  566.            return (H_SYSABORT);
  567.         if (!carrier())
  568.            return (H_CARRIER);
  569.  
  570.         p = rxbufptr;
  571.  
  572.         while ((c = com_getbyte()) >= 0) {
  573.               if (rxoptions & HOPT_HIGHBIT)
  574.                  c &= 0x7f;
  575.  
  576.               n = c;
  577.               if (rxoptions & HOPT_HIGHCTL)
  578.                  n &= 0x7f;
  579.               if (n != H_DLE &&
  580.                   (((rxoptions & HOPT_XONXOFF) && (n == XON || n == XOFF)) ||
  581.                    ((rxoptions & HOPT_CTLCHRS) && (n < 32 || n == 127))))
  582.                  continue;
  583.  
  584.               if (rxdle || c == H_DLE) {
  585.                  switch (c) {
  586.                         case H_DLE:
  587.                              if (++rxdle >= 5)
  588.                                 return (H_CANCEL);
  589.                              break;
  590.  
  591.                         case HCHR_PKTEND:
  592.                              rxbufptr = p;
  593.  
  594.                              switch (rxpktformat) {
  595.                                     case HCHR_BINPKT:
  596.                                          q = rxbufptr;
  597.                                          break;
  598.  
  599.                                     case HCHR_HEXPKT:
  600.                                          for (p = q = rxbuf; p < rxbufptr; p++) {
  601.                                              if (*p == '\\' && *++p != '\\') {
  602.                                                 i = *p;
  603.                                                 n = *++p;
  604.                                                 if ((i -= '0') > 9) i -= ('a' - ':');
  605.                                                 if ((n -= '0') > 9) n -= ('a' - ':');
  606.                                                 if ((i & ~0x0f) || (n & ~0x0f)) {
  607.                                                    i = H_NOPKT;
  608.                                                    break;
  609.                                                 }
  610.                                                 *q++ = (i << 4) | n;
  611.                                              }
  612.                                              else
  613.                                                 *q++ = *p;
  614.                                          }
  615.                                          if (p > rxbufptr)
  616.                                             c = H_NOPKT;
  617.                                          break;
  618.  
  619.                                     case HCHR_ASCPKT:
  620.                                          n = i = 0;
  621.                                          for (p = q = rxbuf; p < rxbufptr; p++) {
  622.                                              i |= ((*p & 0x7f) << n);
  623.                                              if ((n += 7) >= 8) {
  624.                                                 *q++ = (byte) (i & 0xff);
  625.                                                 i >>= 8;
  626.                                                 n -= 8;
  627.                                              }
  628.                                          }
  629.                                          break;
  630.  
  631.                                     case HCHR_UUEPKT:
  632.                                          n = (int) (rxbufptr - rxbuf);
  633.                                          for (p = q = rxbuf; n >= 4; n -= 4, p += 4) {
  634.                                              if (p[0] <= ' ' || p[0] >= 'a' ||
  635.                                                  p[1] <= ' ' || p[1] >= 'a' ||
  636.                                                  p[2] <= ' ' || p[2] >= 'a') {
  637.                                                 c = H_NOPKT;
  638.                                                 break;
  639.                                              }
  640.                                              *q++ = (byte) ((h_uudec(p[0]) << 2) | (h_uudec(p[1]) >> 4));
  641.                                              *q++ = (byte) ((h_uudec(p[1]) << 4) | (h_uudec(p[2]) >> 2));
  642.                                              *q++ = (byte) ((h_uudec(p[2]) << 6) | h_uudec(p[3]));
  643.                                          }
  644.                                          if (n >= 2) {
  645.                                             if (p[0] <= ' ' || p[0] >= 'a') {
  646.                                                c = H_NOPKT;
  647.                                                break;
  648.                                             }
  649.                                             *q++ = (byte) ((h_uudec(p[0]) << 2) | (h_uudec(p[1]) >> 4));
  650.                                             if (n == 3) {
  651.                                                if (p[0] <= ' ' || p[0] >= 'a') {
  652.                                                   c = H_NOPKT;
  653.                                                   break;
  654.                                                }
  655.                                                *q++ = (byte) ((h_uudec(p[1]) << 4) | (h_uudec(p[2]) >> 2));
  656.                                             }
  657.                                          }
  658.                                          break;
  659.  
  660.                                     default:   /* This'd mean internal fluke */
  661. #if H_DEBUG
  662. if (loglevel==0) {
  663.    message(0," <- <PKTEND> (pktformat='%c' dec=%d hex=%02x) ??",
  664.              rxpktformat, rxpktformat, rxpktformat);
  665. }
  666. #endif
  667.                                          c = H_NOPKT;
  668.                                          break;
  669.                              }
  670.  
  671.                              rxbufptr = NULL;
  672.  
  673.                              if (c == H_NOPKT)
  674.                                 break;
  675.  
  676.                              rxpktlen = (word) (q - rxbuf);
  677.                              if (rxpktformat != HCHR_HEXPKT && (rxoptions & HOPT_CRC32)) {
  678.                                 if (rxpktlen < 5) {
  679.                                    c = H_NOPKT;
  680.                                    break;
  681.                                 }
  682.                                 n = h_crc32test(crc32block(rxbuf,rxpktlen));
  683.                                 rxpktlen -= (int) sizeof (long);  /* remove CRC-32 */
  684.                              }
  685.                              else {
  686.                                 if (rxpktlen < 3) {
  687.                                    c = H_NOPKT;
  688.                                    break;
  689.                                 }
  690.                                 n = h_crc16test(crc16block(rxbuf,rxpktlen));
  691.                                 rxpktlen -= (int) sizeof (word);  /* remove CRC-16 */
  692.                              }
  693.  
  694.                              rxpktlen--;                     /* remove type  */
  695.  
  696.                              if (n) {
  697. #if H_DEBUG
  698. if (loglevel==0) {
  699.    char *s1, *s2, *s3, *s4;
  700.  
  701.    message(0," <- PKT (format='%c'  type='%c'  len=%d)",
  702.            rxpktformat, (int) rxbuf[rxpktlen], rxpktlen);
  703.  
  704.    switch (rxbuf[rxpktlen]) {
  705.           case HPKT_START:    message(0,"    START");
  706.                               break;
  707.           case HPKT_INIT:     s1 = ((char *) rxbuf) + ((int) strlen((char *) rxbuf)) + 1;
  708.                               s2 = s1 + ((int) strlen(s1)) + 1;
  709.                               s3 = s2 + ((int) strlen(s2)) + 1;
  710.                               s4 = s3 + ((int) strlen(s3)) + 1;
  711.                               message(0,"    INIT (appinfo='%s'  can='%s'  want='%s'  options='%s'  pktprefix='%s')",
  712.                                       (char *) rxbuf, s1, s2, s3, s4);
  713.                               break;
  714.           case HPKT_INITACK:  message(0,"    INITACK");
  715.                               break;
  716.           case HPKT_FINFO:    message(0,"    FINFO ('%s'  rxstate=%d)",rxbuf,rxstate);
  717.                               break;
  718.           case HPKT_FINFOACK: message(0,"    FINFOACK (pos=%ld  txstate=%d  txfd=%d)",
  719.                                       intell(h_long1(rxbuf)), txstate, txfd);
  720.                               break;
  721.           case HPKT_DATA:     message(0,"    DATA (rxstate=%d  pos=%ld  len=%u)",
  722.                                       rxstate, intell(h_long1(rxbuf)),
  723.                                       (word) (rxpktlen - ((int) sizeof (long))));
  724.                               break;
  725.           case HPKT_DATAACK:  message(0,"    DATAACK (rxstate=%d  pos=%ld)",
  726.                                       rxstate, intell(h_long1(rxbuf)));
  727.                               break;
  728.           case HPKT_RPOS:     message(0,"    RPOS (pos=%ld%s  blklen=%u->%ld  syncid=%ld%s  txstate=%d  txfd=%d)",
  729.                                       intell(h_long1(rxbuf)),
  730.                                       intell(h_long1(rxbuf)) < 0L ? " SKIP" : "",
  731.                                       txblklen, intell(h_long2(rxbuf)),
  732.                                       intell(h_long3(rxbuf)),
  733.                                       intell(h_long3(rxbuf)) == rxsyncid ? " DUP" : "",
  734.                                       txstate, txfd);
  735.                               break;
  736.           case HPKT_EOF:      message(0,"    EOF (rxstate=%d  pos=%ld%s)",
  737.                                       rxstate, intell(h_long1(rxbuf)),
  738.                                       intell(h_long1(rxbuf)) < 0L ? " SKIP" : "");
  739.                               break;
  740.           case HPKT_EOFACK:   message(0,"    EOFACK (txstate=%d)", txstate);
  741.                               break;
  742.           case HPKT_IDLE:     message(0,"    IDLE");
  743.                               break;
  744.           case HPKT_END:      message(0,"    END");
  745.                               break;
  746.           case HPKT_DEVDATA:  s1 = ((char *) rxbuf) + ((int) sizeof (long));
  747.                               message(0,"    DEVDATA (id=%ld  dev=%s  len=%u",
  748.                                       intell(h_long1(rxbuf)), s1,
  749.                                       rxpktlen - (((int) sizeof (long)) + ((int) strlen(s1)) + 1));
  750.                               break;
  751.           case HPKT_DEVDACK:  message(0,"    DEVDACK (devtxstate=%d  id=%ld)",
  752.                                       devtxstate, intell(h_long1(rxbuf)));
  753.                               break;
  754.           default:            message(0,"    Unkown pkttype %d (txstate=%d  rxstate=%d)",
  755.                                       (int) rxbuf[rxpktlen], txstate, rxstate);
  756.                               break;
  757.    }
  758. }
  759. #endif
  760.                                 return ((int) rxbuf[rxpktlen]);
  761.                              }/*goodpkt*/
  762.  
  763. #if H_DEBUG
  764. if (loglevel==0)
  765.    message(0," Bad CRC (format='%c'  type='%c'  len=%d)",
  766.              rxpktformat, (int) rxbuf[rxpktlen], rxpktlen);
  767. #endif
  768.                              break;
  769.  
  770.                         case HCHR_BINPKT:
  771.                         case HCHR_HEXPKT:
  772.                         case HCHR_ASCPKT:
  773.                         case HCHR_UUEPKT:
  774. #if H_DEBUG
  775. if (loglevel==0)
  776.    message(0," <- <PKTSTART> (pktformat='%c')",c);
  777. #endif
  778.                              rxpktformat = c;
  779.                              p = rxbufptr = rxbuf;
  780.                              rxdle = 0;
  781.                              break;
  782.  
  783.                         default:
  784.                              if (p) {
  785.                                 if (p < rxbufmax)
  786.                                    *p++ = (byte) (c ^ 0x40);
  787.                                 else {
  788. #if H_DEBUG
  789. if (loglevel==0)
  790.    message(0," <- Pkt too long - discarded");
  791. #endif
  792.                                    p = NULL;
  793.                                 }
  794.                              }
  795.                              rxdle = 0;
  796.                              break;
  797.                  }
  798.               }
  799.               else if (p) {
  800.                  if (p < rxbufmax)
  801.                     *p++ = (byte) c;
  802.                  else {
  803. #if H_DEBUG
  804. if (loglevel==0)
  805.    message(0," <- Pkt too long - discarded");
  806. #endif
  807.                     p = NULL;
  808.                  }
  809.               }
  810.         }
  811.  
  812.         rxbufptr = p;
  813.  
  814.         if (h_timer_running(braindead) && h_timer_expired(braindead)) {
  815. #if H_DEBUG
  816. if (loglevel==0)
  817.    message(0," <- BrainDead (timer=%08lx  time=%08lx)",
  818.            braindead,time(NULL));
  819. #endif
  820.            return (H_BRAINTIME);
  821.         }
  822.         if (h_timer_running(txtimer) && h_timer_expired(txtimer)) {
  823. #if H_DEBUG
  824. if (loglevel==0)
  825.    message(0," <- TxTimer (timer=%08lx  time=%08lx)",
  826.            txtimer,time(NULL));
  827. #endif
  828.            return (H_TXTIME);
  829.         }
  830.         if (h_timer_running(devtxtimer) && h_timer_expired(devtxtimer)) {
  831. #if H_DEBUG
  832. if (loglevel==0)
  833.    message(0," <- DevTxTimer (timer=%08lx  time=%08lx)",
  834.            devtxtimer,time(NULL));
  835. #endif
  836.            return (H_DEVTXTIME);
  837.         }
  838.  
  839.         sys_idle();
  840.         return (H_NOPKT);
  841. }/*rxpkt()*/
  842.  
  843.  
  844. /*---------------------------------------------------------------------------*/
  845. static void hydra_status (boolean xmit)
  846. {
  847.         long pos    = xmit ? txpos    : rxpos,
  848.              fsize  = xmit ? txfsize  : rxfsize;
  849.  
  850.         long start   = xmit ? txstart  : rxstart;
  851.         long elapsed = time(NULL) - start;
  852.         long cps;
  853.  
  854.         if(elapsed && pos >= 1024L)
  855.            cps = pos / elapsed;
  856.         else
  857.            cps = 0;
  858.  
  859.         hydra_gotoxy(46,xmit ? 1 : 2);
  860.         if (pos >= fsize)
  861.            hydra_printf("%ld/%ld [%ld CPS] (EOF)",pos,fsize,cps);
  862.         else {
  863.            int left = (int) ((((fsize - pos) / 128L) * 1340L) / cur_speed);
  864.            char *p = "";
  865.  
  866.            if (xmit) {
  867.               if      (txstate == HTX_DATAACK) p = "ACK ";
  868.               else if (txstate == HTX_XWAIT)   p = "WAIT ";
  869.            }
  870.            hydra_printf("%ld/%ld [%ld CPS] (%s%d:%02d min left)",
  871.                         pos, fsize, cps, p, left / 60, left % 60);
  872.         }
  873.         hydra_clreol();
  874. }/*hydra_status()*/
  875.  
  876.  
  877. /*---------------------------------------------------------------------------*/
  878. static void hydra_pct (boolean xmit)
  879. {
  880.         long offset = xmit ? txoffset : rxoffset,
  881.              fsize  = xmit ? txfsize  : rxfsize,
  882.              start  = xmit ? txstart  : rxstart,
  883.              elapsed, bytes, cps, pct;
  884.  
  885.         elapsed = time(NULL) - start;
  886.         bytes = fsize - offset;
  887.         if (bytes < 1024L || elapsed == 0L)
  888.            return;
  889.         cps = bytes / elapsed;
  890.         pct = (cps * 1000L) / ((long) cur_speed);
  891.         message(2,"+%s-H CPS: %ld (%ld bytes), %d:%02d min.  Eff: %ld%%",
  892.                 xmit ? "Sent" : "Rcvd", cps, bytes,
  893.                 (int) (elapsed / 60), (int) (elapsed % 60), pct);
  894. }/*hydra_pct()*/
  895.  
  896.  
  897. /*---------------------------------------------------------------------------*/
  898. void hydra_badxfer (void)
  899. {
  900.         if (rxfd >= 0) {
  901.            dos_close(rxfd);
  902.            rxfd = -1;
  903.            if (xfer_bad())
  904.               message(1,"+HRECV: Bad xfer recovery-info saved");
  905.            else
  906.               message(0,"-HRECV: Bad xfer - file deleted");
  907.         }
  908. }/*hydra_badxfer()*/
  909.  
  910.  
  911. /*---------------------------------------------------------------------------*/
  912. void hydra_init (dword want_options)
  913. {
  914.         register word i, j;
  915.         word  crc16;
  916.         dword crc32;
  917.  
  918.         txbuf    = (byte *)  malloc(H_BUFLEN);
  919.         rxbuf    = (byte *)  malloc(H_BUFLEN);
  920.         crc16tab = (word *)  malloc(256 * ((int) sizeof (word)));
  921.         crc32tab = (dword *) malloc(256 * ((int) sizeof (dword)));
  922.         if (!txbuf || !rxbuf || !crc16tab || !crc32tab) {
  923.            message(6,"!HYDRA: Can't allocate buffers!");
  924.            endprog(2);
  925.         }
  926.         txbufin  = txbuf + ((H_MAXBLKLEN + H_OVERHEAD + 5) * 2);
  927.         rxbufmax = rxbuf + H_MAXPKTLEN;
  928.  
  929.         for (i = 0; i < 256; i++) {
  930.             crc16 = i;
  931.             crc32 = i;
  932.             for (j = 8; j > 0; j--) {
  933.                 if (crc16 & 1) crc16 = (crc16 >> 1) ^ h_crc16poly;
  934.                 else           crc16 >>= 1;
  935.                 if (crc32 & 1) crc32 = (crc32 >> 1) ^ h_crc32poly;
  936.                 else           crc32 >>= 1;
  937.             }
  938.             crc16tab[i] = crc16;
  939.             crc32tab[i] = crc32;
  940.         }
  941.  
  942.         batchesdone = 0;
  943.  
  944.         originator = nooriginator ? false : true;
  945.  
  946.         if (originator)
  947.            hdxlink = false;
  948.         else if (hdxsession)
  949.            hdxlink = true;
  950.  
  951.         options = (want_options & HCAN_OPTIONS) & ~HUNN_OPTIONS;
  952.  
  953. #ifdef AMIGA
  954.         timeout = (40960L / cur_speed);
  955. #else
  956.         timeout = (word) (40960L / cur_speed);
  957. #endif
  958.         if      (timeout < H_MINTIMER) timeout = H_MINTIMER;
  959.         else if (timeout > H_MAXTIMER) timeout = H_MAXTIMER;
  960.  
  961.     txmaxblklen = (cur_speed / 300) * 128;
  962.         if      (txmaxblklen < 256)         txmaxblklen = 256;
  963.         else if (txmaxblklen > H_MAXBLKLEN) txmaxblklen = H_MAXBLKLEN;
  964.  
  965.         rxblklen = txblklen = (cur_speed < 2400U) ? 256 : 512;
  966.  
  967.         txgoodbytes  = 0;
  968.         txgoodneeded = 1024;
  969.  
  970.         txstate = HTX_DONE;
  971.  
  972.         if (!mailer)
  973.            message(-1,"+HYDRA session (%s-directional mode)",
  974.                       hdxlink ? "Uni" : "Bi");
  975.  
  976. #if WIN_AGL
  977. { byte ev   = win_maxver - 25,          /* extra lines available vertically? */
  978.        elog = ev / 3,                   /* 1/3 of extra lines for log_win    */
  979.        eloc = ev / 3,                   /* 1/3 of extra lines for local_win  */
  980.        erem = ev - (elog + eloc);       /* the rest is extra for remote_win  */
  981.  
  982.         log_win = win_create(1, 1, win_maxhor, 6 + elog,
  983.                               CUR_NONE, CON_RAW | CON_WRAP | CON_SCROLL,
  984.                               CHR_NORMAL, KEY_RAW);
  985.         win_setattrib(log_win,CHR_INVERSE);
  986.         win_clreol(log_win);
  987.         win_printf(log_win," %s v%s - COPYRIGHT (C) 1991-1993 A.G.Lentz, LENTZ SOFTWARE-DEVELOPMENT",PRGNAME,VERSION);
  988.         win_setattrib(log_win,CHR_NORMAL);
  989.         win_setrange(log_win,1,2,win_maxhor,6 + elog);
  990.  
  991.         file_win = win_create(1, 7 + elog, win_maxhor, 9 + elog,
  992.                               CUR_NONE, CON_RAW, CHR_NORMAL, KEY_RAW);
  993.         win_setattrib(file_win,CHR_INVERSE);
  994.         win_clreol(file_win);
  995.         win_printf(file_win," Port=%u   ComSpeed=%u   LineSpeed=%u",
  996.                             port + 1, com_speed, cur_speed);
  997.         win_xyputs(file_win,48,1,"Press ESC to abort Hydra session");
  998.         win_setattrib(file_win,CHR_F_YELLOW);
  999.         win_xyputs(file_win,2,2,"Sending  :");
  1000.         win_xyputs(file_win,2,3,"Receiving:");
  1001.         win_setattrib(file_win,CHR_NORMAL);
  1002.         win_setrange(file_win,1,2,win_maxhor,3);
  1003.  
  1004.         remote_win = win_create(1, 10 + elog, win_maxhor, 17 + elog + erem,
  1005.                                 CUR_NONE, CON_COOKED | CON_WRAP | CON_SCROLL,
  1006.                                 CHR_NORMAL, KEY_RAW);
  1007.         win_setattrib(remote_win,CHR_INVERSE);
  1008.         win_fill(remote_win,177);
  1009.         win_puts(remote_win," Remote ");
  1010.         win_setattrib(remote_win,CHR_NORMAL);
  1011.         win_setrange(remote_win,1,2,win_maxhor,8 + erem);
  1012.         win_cls(remote_win);
  1013.  
  1014.         local_win = win_create(1, 18 + elog + erem, win_maxhor, win_maxver,
  1015.                                CUR_NORMAL, CON_COOKED | CON_WRAP | CON_SCROLL,
  1016.                                CHR_NORMAL, KEY_RAW);
  1017.         win_setattrib(local_win,CHR_INVERSE);
  1018.         win_fill(local_win,177);
  1019.         win_puts(local_win," Local (Press Alt-C to start/end chat mode) ");
  1020.         win_setattrib(local_win,CHR_NORMAL);
  1021.         win_setrange(local_win,1,2,win_maxhor,8 + eloc);
  1022.         win_cls(local_win);
  1023.  
  1024.         log_first = false;
  1025.  
  1026.         win_settop(log_win);
  1027.         win_settop(file_win);
  1028.         win_settop(remote_win);
  1029.         win_settop(local_win);
  1030. }
  1031. #elif defined(AMIGA)
  1032.     ConPrintf(LogRequest,"\33[7m %s v%s - COPYRIGHT (C) 1991-1993 A.G.Lentz, LENTZ SOFTWARE-DEVELOPMENT\33[27m\n",PRGNAME,VERSION);
  1033.     ConPrintf(FileRequest,"\33[1;2HSending  :\33[2;2HReceiving:");
  1034. #else
  1035. { struct text_info ti;
  1036.  
  1037.         term_x = wherex();
  1038.         term_y = wherey();
  1039.         gettextinfo(&ti);
  1040.         window(1,1,ti.screenwidth,ti.screenheight);
  1041.         term_scr = malloc(ti.screenwidth * ti.screenheight * sizeof (word));
  1042.         gettext(1,1,ti.screenwidth,ti.screenheight,term_scr);
  1043.  
  1044.         clrscr();
  1045.         textbackground(LIGHTGRAY);
  1046.         textcolor(BLACK);
  1047.  
  1048.         gotoxy(1,1);
  1049.         clreol();
  1050.         cprintf(" %s v%s - COPYRIGHT (C) 1991-1993 A.G.Lentz, LENTZ SOFTWARE-DEVELOPMENT",PRGNAME,VERSION);
  1051.  
  1052.         gotoxy(1,7);
  1053.         clreol();
  1054.         cprintf(" Port=%u   ComSpeed=%u   LineSpeed=%u",
  1055.                 port + 1, com_speed, cur_speed);
  1056.         gotoxy(48,7);
  1057.         cprintf("Press ESC to abort Hydra session");
  1058.  
  1059.         gotoxy(1,10);
  1060.         for (i = 0; i < ti.screenwidth; i++) putch(177);
  1061.         gotoxy(1,10);
  1062.         cprintf(" Remote ");
  1063.  
  1064.         gotoxy(1,18);
  1065.         for (i = 0; i < ti.screenwidth; i++) putch(177);
  1066.         gotoxy(1,18);
  1067.         cprintf(" Local (Press Alt-C to start/end chat mode) ");
  1068.  
  1069.         textbackground(BLACK);
  1070.         textcolor(YELLOW);
  1071.         gotoxy(2,8);
  1072.         cprintf("Sending  :");
  1073.         gotoxy(2,9);
  1074.         cprintf("Receiving:");
  1075.  
  1076.         window(1,19,80,25);
  1077.         textcolor(LIGHTGRAY);
  1078.         file_x = file_y = remote_x = remote_y = local_x = local_y = 1;
  1079.         log_y = 0;
  1080. }
  1081. #endif
  1082.  
  1083.         hydra_devfunc("CON",rem_chat);
  1084.  
  1085.         chatfill  = 0;
  1086.         chattimer = -1L;
  1087.         lasttimer = 0L;
  1088.  
  1089.         message(2,"+HYDRA session (%s-directional mode)",
  1090.                   hdxlink ? "Uni" : "Bi");
  1091. }/*hydra_init()*/
  1092.  
  1093.  
  1094. /*---------------------------------------------------------------------------*/
  1095. void hydra_deinit (void)
  1096. {
  1097. #if WIN_AGL
  1098.         win_settop(0);
  1099.         win_close(file_win);
  1100.         win_close(log_win);
  1101.         win_close(remote_win);
  1102.         win_close(local_win);
  1103.         file_win = 0;
  1104. #elif defined(AMIGA)
  1105. /* */
  1106. #else
  1107. { struct text_info ti;
  1108.  
  1109.         gettextinfo(&ti);
  1110.         window(1,1,ti.screenwidth,ti.screenheight);
  1111.         puttext(1,1,ti.screenwidth,ti.screenheight,term_scr);
  1112.         gotoxy(term_x,term_y);
  1113.         free(term_scr);
  1114.         file_x = 0;
  1115. }
  1116. #endif
  1117.  
  1118.         free(txbuf);
  1119.         free(rxbuf);
  1120.         free(crc16tab);
  1121.         free(crc32tab);
  1122. }/*hydra_deinit()*/
  1123.  
  1124.  
  1125. /*---------------------------------------------------------------------------*/
  1126. int hydra (char *txpathname, char *txalias)
  1127. {
  1128.         int   res;
  1129.         int   pkttype;
  1130.         char *p, *q;
  1131.         int   i;
  1132.         struct stat f;
  1133.  
  1134.         /*-------------------------------------------------------------------*/
  1135.         if (txstate == HTX_DONE) {
  1136.            txstate        = HTX_START;
  1137.            hydra_gotoxy(13,1);
  1138.            hydra_printf("Init");
  1139.            txoptions      = HTXI_OPTIONS;
  1140.            txpktprefix[0] = '\0';
  1141.  
  1142.            rxstate   = HRX_INIT;
  1143.            hydra_gotoxy(13,2);
  1144.            hydra_printf("Init");
  1145.            rxoptions = HRXI_OPTIONS;
  1146.            rxfd      = -1;
  1147.            rxdle     = 0;
  1148.            rxbufptr  = NULL;
  1149.            rxtimer   = h_timer_reset();
  1150.  
  1151.            devtxid    = devrxid = 0L;
  1152.            devtxtimer = h_timer_reset();
  1153.            devtxstate = HTD_DONE;
  1154.  
  1155.            braindead = h_timer_set(H_BRAINDEAD);
  1156.         }
  1157.         else
  1158.            txstate = HTX_FINFO;
  1159.  
  1160.         txtimer   = h_timer_reset();
  1161.         txretries = 0;
  1162.  
  1163.         /*-------------------------------------------------------------------*/
  1164.         if (txpathname) {
  1165.            stat(txpathname,&f);
  1166.            txfsize = f.st_size;
  1167.            txftime = f.st_mtime;
  1168.  
  1169.            if ((txfd = dos_sopen(txpathname,0)) < 0) {
  1170.               message(3,"-HSEND: Unable to open %s",txpathname);
  1171.               return (XFER_SKIP);
  1172.            }
  1173.  
  1174. #ifdef AMIGA
  1175.            strcpy(txfname,FilePart(txpathname));
  1176. #else
  1177.            strupr(txpathname);
  1178.            for (p=txpathname, q=txfname; *p; p++) {
  1179.                if (*q=*p, *p=='\\' || *p==':' || *p=='/')
  1180.                   q=txfname;
  1181.                else q++;
  1182.            }
  1183.            *q = '\0';
  1184.  
  1185.            if (txalias)
  1186.               strupr(txalias);
  1187. #endif    /* AMIGA */
  1188.  
  1189.            txstart  = 0L;
  1190.            txsyncid = 0L;
  1191.         }
  1192.         else {
  1193.            txfd = -1;
  1194.            strcpy(txfname,"");
  1195.         }
  1196.  
  1197.         /*-------------------------------------------------------------------*/
  1198.         do {
  1199.            /*----------------------------------------------------------------*/
  1200.            switch (devtxstate) {
  1201.                   /*---------------------------------------------------------*/
  1202.                   case HTD_DATA:
  1203.                        if (txstate > HTX_RINIT) {
  1204.                           h_long1(txbufin) = intell(devtxid);
  1205.                           p = ((char *) txbufin) + ((int) sizeof(long));
  1206.                           strcpy(p,devtxdev);
  1207.                           p += H_FLAGLEN + 1;
  1208.                           memcpy(p,devtxbuf,devtxlen);
  1209.                           txpkt(((int) sizeof (long)) + H_FLAGLEN + 1 + devtxlen,HPKT_DEVDATA);
  1210.                           devtxtimer = h_timer_set(timeout);
  1211.                           devtxstate = HTD_DACK;
  1212.                        }
  1213.                        break;
  1214.  
  1215.                   /*---------------------------------------------------------*/
  1216.                   default:
  1217.                        break;
  1218.  
  1219.                   /*---------------------------------------------------------*/
  1220.            }
  1221.  
  1222.            /*----------------------------------------------------------------*/
  1223.            switch (txstate) {
  1224.                   /*---------------------------------------------------------*/
  1225.                   case HTX_START:
  1226.                        com_putblock((byte *) autostr,(int) strlen(autostr));
  1227.                        txpkt(0,HPKT_START);
  1228.                        txtimer = h_timer_set(H_START);
  1229.                        txstate = HTX_SWAIT;
  1230.                        break;
  1231.  
  1232.                   /*---------------------------------------------------------*/
  1233.                   case HTX_INIT:
  1234.                        p = (char *) txbufin;
  1235.                        sprintf(p,"%08lx%s,%s %s",
  1236.                                  H_REVSTAMP,PRGNAME,VERSION,HC_OS);
  1237.                        p += ((int) strlen(p)) + 1;/* our app info & HYDRA rev. */
  1238.                        put_flags(p,h_flags,HCAN_OPTIONS);    /* what we CAN  */
  1239.                        p += ((int) strlen(p)) + 1;
  1240.                        put_flags(p,h_flags,options);         /* what we WANT */
  1241.                        p += ((int) strlen(p)) + 1;
  1242.                        sprintf(p,"%08lx%08lx",               /* TxRx windows */
  1243.                                  hydra_txwindow,hydra_rxwindow);
  1244.                        p += ((int) strlen(p)) + 1;
  1245.                        strcpy(p,pktprefix);     /* pkt prefix string we want */
  1246.                        p += ((int) strlen(p)) + 1;
  1247.  
  1248.                        txoptions = HTXI_OPTIONS;
  1249.                        txpkt((word) (((byte *) p) - txbufin), HPKT_INIT);
  1250.                        txoptions = rxoptions;
  1251.                        txtimer = h_timer_set(timeout / 2);
  1252.                        txstate = HTX_INITACK;
  1253.                        break;
  1254.  
  1255.                   /*---------------------------------------------------------*/
  1256.                   case HTX_FINFO:
  1257.                        if (txfd >= 0) {
  1258.                           if (!txretries) {
  1259.                              hydra_gotoxy(13,1);
  1260.                              hydra_printf(txfname);
  1261.                              if (txalias) {
  1262.                                 hydra_gotoxy(25,1);
  1263.                                 hydra_printf("  ->  %s",txalias);
  1264.                              }
  1265.                              hydra_clreol();
  1266.                              message(2,"+HSEND: %s%s%s (%ldb), %d min.",
  1267.                                      txpathname, txalias ? " -> " : "", txalias ? txalias : "",
  1268.                                      txfsize, (int) (txfsize * 10L / cur_speed + 27L) / 54L);
  1269.  
  1270. #ifndef AMIGA    /* OLSEN */
  1271.                              strlwr(txfname);
  1272. #endif    /* AMIGA */
  1273.                           }
  1274.                           sprintf((char *) txbufin,"%08lx%08lx%08lx%08lx%08lx%s",
  1275.                                   txftime, txfsize, 0L, 0L, 0L,
  1276.                                   txalias ? txalias : txfname);
  1277.                        }
  1278.                        else {
  1279.                           if (!txretries) {
  1280.                              hydra_gotoxy(13,1);
  1281.                              hydra_printf("End of batch");
  1282.                              hydra_clreol();
  1283.                              message(1,"+HSEND: End of batch");
  1284.                           }
  1285.                           strcpy((char *) txbufin,txfname);
  1286.                        }
  1287.                        txpkt(((int) strlen((char *) txbufin)) + 1,HPKT_FINFO);
  1288.                        txtimer = h_timer_set(txretries ? timeout / 2 : timeout);
  1289.                        txstate = HTX_FINFOACK;
  1290.                        break;
  1291.  
  1292.                   /*---------------------------------------------------------*/
  1293.                   case HTX_XDATA:
  1294.                        if (com_outfull() > txmaxblklen)
  1295.                           break;
  1296.  
  1297.                        if (txpos < 0L)
  1298.                           i = -1;                                    /* Skip */
  1299.                        else {
  1300.                           h_long1(txbufin) = intell(txpos);
  1301.                           if ((i = dos_read(txfd,txbufin + ((int) sizeof (long)),txblklen)) < 0) {
  1302.                              message(6,"!HSEND: File read error");
  1303.                              dos_close(txfd);
  1304.                              txfd = -1;
  1305.                              txpos = -2L;                            /* Skip */
  1306.                           }
  1307.                        }
  1308.  
  1309.                        if (i > 0) {
  1310.                           txpos += i;
  1311.                           txpkt(((int) sizeof (long)) + i, HPKT_DATA);
  1312.  
  1313.                           if (txblklen < txmaxblklen &&
  1314.                               (txgoodbytes += i) >= txgoodneeded) {
  1315.                              txblklen <<= 1;
  1316.                              if (txblklen >= txmaxblklen) {
  1317.                                 txblklen = txmaxblklen;
  1318.                                 txgoodneeded = 0;
  1319.                              }
  1320.                              txgoodbytes = 0;
  1321.                           }
  1322.  
  1323.                           if (txwindow && (txpos >= (txlastack + txwindow))) {
  1324.                              txtimer = h_timer_set(txretries ? timeout / 2 : timeout);
  1325.                              txstate = HTX_DATAACK;
  1326.                           }
  1327.  
  1328.                           if (!txstart)
  1329.                              txstart = time(NULL);
  1330.                           hydra_status(true);
  1331.                           break;
  1332.                        }
  1333.  
  1334.                        /* fallthrough to HTX_EOF */
  1335.  
  1336.                   /*---------------------------------------------------------*/
  1337.                   case HTX_EOF:
  1338.                        h_long1(txbufin) = intell(txpos);
  1339.                        txpkt((int) sizeof (long),HPKT_EOF);
  1340.                        txtimer = h_timer_set(txretries ? timeout / 2 : timeout);
  1341.                        txstate = HTX_EOFACK;
  1342.                        break;
  1343.  
  1344.                   /*---------------------------------------------------------*/
  1345.                   case HTX_END:
  1346.                        txpkt(0,HPKT_END);
  1347.                        txpkt(0,HPKT_END);
  1348.                        txtimer = h_timer_set(timeout / 2);
  1349.                        txstate = HTX_ENDACK;
  1350.                        break;
  1351.  
  1352.                   /*---------------------------------------------------------*/
  1353.                   default:
  1354.                        break;
  1355.  
  1356.                   /*---------------------------------------------------------*/
  1357.            }
  1358.  
  1359.            /*----------------------------------------------------------------*/
  1360.            while (txstate && (pkttype = rxpkt()) != H_NOPKT) {
  1361.                  /*----------------------------------------------------------*/
  1362.                  switch (pkttype) {
  1363.                         /*---------------------------------------------------*/
  1364.                         case H_CARRIER:
  1365.                         case H_CANCEL:
  1366.                         case H_SYSABORT:
  1367.                         case H_BRAINTIME:
  1368.                              switch (pkttype) {
  1369.                                     case H_CARRIER:   p = "Carrier lost";          break;
  1370.                                     case H_CANCEL:    p = "Aborted by other side"; break;
  1371.                                     case H_SYSABORT:  p = "Aborted by operator";   break;
  1372.                                     case H_BRAINTIME: p = "Other end died";        break;
  1373.                              }
  1374.                              message(3,"-HYDRA: %s",p);
  1375.                              txstate = HTX_DONE;
  1376.                              res = XFER_ABORT;
  1377.                              break;
  1378.  
  1379.                         /*---------------------------------------------------*/
  1380.                         case H_TXTIME:
  1381.                              if (txstate == HTX_XWAIT || txstate == HTX_REND) {
  1382.                                 txpkt(0,HPKT_IDLE);
  1383.                                 txtimer = h_timer_set(H_IDLE);
  1384.                                 break;
  1385.                              }
  1386.  
  1387.                              if (++txretries > max_retries) {
  1388.                                 message(3,"-HSEND: Too many errors");
  1389.                                 txstate = HTX_DONE;
  1390.                                 res = XFER_ABORT;
  1391.                                 break;
  1392.                              }
  1393.  
  1394.                              message(0,"-HSEND: Timeout - Retry %u",txretries);
  1395.  
  1396.                              txtimer = h_timer_reset();
  1397.  
  1398.                              switch (txstate) {
  1399.                                     case HTX_SWAIT:    txstate = HTX_START; break;
  1400.                                     case HTX_INITACK:  txstate = HTX_INIT;  break;
  1401.                                     case HTX_FINFOACK: txstate = HTX_FINFO; break;
  1402.                                     case HTX_DATAACK:  txstate = HTX_XDATA; break;
  1403.                                     case HTX_EOFACK:   txstate = HTX_EOF;   break;
  1404.                                     case HTX_ENDACK:   txstate = HTX_END;   break;
  1405.                              }
  1406.                              break;
  1407.  
  1408.                         /*---------------------------------------------------*/
  1409.                         case H_DEVTXTIME:
  1410.                              if (++devtxretries > max_retries) {
  1411.                                 message(3,"-HDEVTX: Too many errors");
  1412.                                 txstate = HTX_DONE;
  1413.                                 res = XFER_ABORT;
  1414.                                 break;
  1415.                              }
  1416.  
  1417.                              message(0,"-HDEVTX: Timeout - Retry %u",devtxretries);
  1418.  
  1419.                              devtxtimer = h_timer_reset();
  1420.                              devtxstate = HTD_DATA;
  1421.                              break;
  1422.  
  1423.                         /*---------------------------------------------------*/
  1424.                         case HPKT_START:
  1425.                              if (txstate == HTX_START || txstate == HTX_SWAIT) {
  1426.                                 txtimer = h_timer_reset();
  1427.                                 txretries = 0;
  1428.                                 txstate = HTX_INIT;
  1429.                                 braindead = h_timer_set(H_BRAINDEAD);
  1430.                              }
  1431.                              break;
  1432.  
  1433.                         /*---------------------------------------------------*/
  1434.                         case HPKT_INIT:
  1435.                              if (rxstate == HRX_INIT) {
  1436.                                 p = (char *) rxbuf;
  1437.                                 p += ((int) strlen(p)) + 1;
  1438.                                 q = p + ((int) strlen(p)) + 1;
  1439.                                 rxoptions  = options | HUNN_OPTIONS;
  1440.                                 rxoptions |= get_flags(q,h_flags);
  1441.                                 rxoptions &= get_flags(p,h_flags);
  1442.                                 rxoptions &= HCAN_OPTIONS;
  1443.                                 if (rxoptions < (options & HNEC_OPTIONS)) {
  1444.                                    message(6,"!HYDRA: Incompatible on this link");
  1445.                                    txstate = HTX_DONE;
  1446.                                    res = XFER_ABORT;
  1447.                                    break;
  1448.                                 }
  1449.                                 p = q + ((int) strlen(q)) + 1;
  1450.                                 rxwindow = txwindow = 0L;
  1451.                                 sscanf(p,"%08lx%08lx", &rxwindow,&txwindow);
  1452.                                 if (rxwindow < 0L) rxwindow = 0L;
  1453.                                 if (hydra_rxwindow &&
  1454.                                     (!rxwindow || hydra_rxwindow < rxwindow))
  1455.                                    rxwindow = hydra_rxwindow;
  1456.                                 if (txwindow < 0L) txwindow = 0L;
  1457.                                 if (hydra_txwindow &&
  1458.                                     (!txwindow || hydra_txwindow < txwindow))
  1459.                                    txwindow = hydra_txwindow;
  1460.                                 p += ((int) strlen(p)) + 1;
  1461.                                 strncpy(txpktprefix,p,H_PKTPREFIX);
  1462.                                 txpktprefix[H_PKTPREFIX] = '\0';
  1463.  
  1464.                                 if (!batchesdone) {
  1465.                                    long revstamp;
  1466.  
  1467.                                    p = (char *) rxbuf;
  1468.                                    sscanf(p,"%08lx",&revstamp);
  1469.                                    message(0,"*HYDRA: Other's HydraRev=%s",
  1470.                                            h_revdate(revstamp));
  1471.                                    p += 8;
  1472.                                    if ((q = strchr(p,',')) != NULL) *q = ' ';
  1473.                                    if ((q = strchr(p,',')) != NULL) *q = '/';
  1474.                                    message(0,"*HYDRA: Other's App.Info '%s'",p);
  1475.                                    put_flags((char *) rxbuf,h_flags,rxoptions);
  1476.                                    message(1,"*HYDRA: Using link options '%s'",rxbuf);
  1477.                                    if (txwindow || rxwindow)
  1478.                                       message(0,"*HYDRA: Window tx=%ld rx=%ld",
  1479.                                                 txwindow,rxwindow);
  1480.                                 }
  1481.  
  1482.                                 chattimer = (rxoptions & HOPT_DEVICE) ? 0L : -2L;
  1483.  
  1484.                                 txoptions = rxoptions;
  1485.                                 rxstate = HRX_FINFO;
  1486.                              }
  1487.  
  1488.                              txpkt(0,HPKT_INITACK);
  1489.                              break;
  1490.  
  1491.                         /*---------------------------------------------------*/
  1492.                         case HPKT_INITACK:
  1493.                              if (txstate == HTX_INIT || txstate == HTX_INITACK) {
  1494.                                 braindead = h_timer_set(H_BRAINDEAD);
  1495.                                 txtimer = h_timer_reset();
  1496.                                 txretries = 0;
  1497.                                 txstate = HTX_RINIT;
  1498.                              }
  1499.                              break;
  1500.  
  1501.                         /*---------------------------------------------------*/
  1502.                         case HPKT_FINFO:
  1503.                              if (rxstate == HRX_FINFO) {
  1504.                                 braindead = h_timer_set(H_BRAINDEAD);
  1505.                                 if (!rxbuf[0]) {
  1506.                                    hydra_gotoxy(13,2);
  1507.                                    hydra_printf("End of batch");
  1508.                                    hydra_clreol();
  1509.                                    message(1,"*HRECV: End of batch");
  1510.                                    rxpos = 0L;
  1511.                                    rxstate = HRX_DONE;
  1512.                                    batchesdone++;
  1513.                                 }
  1514.                                 else {
  1515.                                    long diskfree;
  1516.  
  1517.                                    rxfsize = rxftime = 0L;
  1518.                                    rxfname[0] = '\0';
  1519.                                    sscanf((char *) rxbuf,"%08lx%08lx%*08lx%*08lx%*08lx%s",
  1520.                                           &rxftime, &rxfsize, rxfname);
  1521.  
  1522. #ifdef AMIGA
  1523.                                    strcpy(rxfname,&rxbuf[5 * 8]);    /* Gets the full filename even if there are spaces in it. */
  1524. #endif    /* AMIGA */
  1525.  
  1526. #ifndef AMIGA
  1527.                                    strupr(rxfname);
  1528. #endif    /* AMIGA */
  1529.                                    hydra_gotoxy(13,2);
  1530.                                    hydra_printf(rxfname);
  1531.                                    hydra_clreol();
  1532.  
  1533.                                    rxpathname = xfer_init(rxfname,rxfsize,rxftime);
  1534.  
  1535.                                    diskfree = freespace(rxpathname);
  1536.  
  1537.                                    if (!rxpathname) {   /* Already have file */
  1538.                                       if (single_done) {
  1539.                                          hydra_gotoxy(29,2);
  1540.                                          hydra_printf("Skipping additional files");
  1541.                                          message(1,"+HRECV: Skipping additional files (file %s)",rxfname);
  1542.                                          rxpos = -2L;
  1543.                                       }
  1544.                                       else {
  1545.                                          hydra_gotoxy(29,2);
  1546.                                          hydra_printf("Already have file");
  1547.                                          message(1,"+HRECV: Already have %s",rxfname);
  1548.                                          rxpos = -1L;
  1549.                                       }
  1550.                                    }
  1551.                                    else if (rxfsize + 10240L > diskfree) {
  1552.                                       hydra_gotoxy(29,2);
  1553.                                       hydra_printf("Not enough diskspace");
  1554.                                       message(6,"!HRECV: %s not enough diskspace: %ld > %ld",
  1555.                                               rxfname, rxfsize + 10240L, diskfree);
  1556.                                       rxpos = -2L;
  1557.                                    }
  1558.                                    else {
  1559.                                       if (fexist(rxpathname)) { /* Resuming? */
  1560.                                          if ((rxfd = dos_sopen(rxpathname,0)) < 0) {
  1561.                                             message(6,"!HRECV: Unable to re-open %s",rxpathname);
  1562.                                             rxpos = -2L;
  1563.                                          }
  1564.                                       }
  1565.                                       else if ((rxfd = dos_sopen(rxpathname,1)) < 0) {
  1566.                                          message(6,"!HRECV: Unable to create %s",rxpathname);
  1567.                                          rxpos = -2L;
  1568.                                       }
  1569.  
  1570.                                       if (rxfd >= 0) {
  1571.                                          message(2,"+HRECV: %s (%ldb), %d min.",
  1572.                                                  rxfname, rxfsize,
  1573.                                                  (int) (rxfsize * 10L / cur_speed + 27L) / 54L);
  1574.                                          if (dos_seek(rxfd,0L,SEEK_END) < 0L) {
  1575.                                             message(6,"!HRECV: File seek error");
  1576.                                             hydra_badxfer();
  1577.                                             rxpos = -2L;
  1578.                                          }
  1579.                                          else {
  1580.                                             rxoffset = rxpos = dos_tell(rxfd);
  1581.                                             if (rxpos < 0L) {
  1582.                                                message(6,"!HRECV: File tell error");
  1583.                                                hydra_badxfer();
  1584.                                                rxpos = -2L;
  1585.                                             }
  1586.                                             else {
  1587.                                                rxstart = 0L;
  1588.                                                rxtimer = h_timer_reset();
  1589.                                                rxretries = 0;
  1590.                                                rxlastsync = 0L;
  1591.                                                rxsyncid = 0L;
  1592.                                                hydra_status(false);
  1593.                                                if (rxpos > 0L) {
  1594.                                                   hydra_gotoxy(46,2);
  1595.                                                   hydra_printf("%ld/%ld",rxpos,rxfsize);
  1596.                                                   message(1,"+HRECV: Resuming from offset %ld (%d min. to go)",
  1597.                                                           rxpos, (int) ((rxfsize - rxoffset) * 10L / cur_speed + 27L) / 54L);
  1598.                                                }
  1599.                                                rxstate = HRX_DATA;
  1600.                                             }
  1601.                                          }
  1602.                                       }
  1603.                                    }
  1604.                                 }
  1605.                              }
  1606.                              else if (rxstate == HRX_DONE)
  1607.                                 rxpos = (!rxbuf[0]) ? 0L : -2L;
  1608.  
  1609.                              h_long1(txbufin) = intell(rxpos);
  1610.                              txpkt((int) sizeof (long),HPKT_FINFOACK);
  1611.                              break;
  1612.  
  1613.                         /*---------------------------------------------------*/
  1614.                         case HPKT_FINFOACK:
  1615.                              if (txstate == HTX_FINFO || txstate == HTX_FINFOACK) {
  1616.                                 braindead = h_timer_set(H_BRAINDEAD);
  1617.                                 txretries = 0;
  1618.                                 if (!txfname[0]) {
  1619.                                    txtimer = h_timer_set(H_IDLE);
  1620.                                    txstate = HTX_REND;
  1621.                                 }
  1622.                                 else {
  1623.                                    txtimer = h_timer_reset();
  1624.                                    txpos = intell(h_long1(rxbuf));
  1625.                                    if (txpos >= 0L) {
  1626.                                       txoffset = txpos;
  1627.                                       txlastack = txpos;
  1628.                                       hydra_status(true);
  1629.                                       if (txpos > 0L) {
  1630.                                          message(1,"+HSEND: Transmitting from offset %ld (%d min. to go)",
  1631.                                                  txpos, (int) ((txfsize - txoffset) * 10L / cur_speed + 27L) / 54L);
  1632.                                          if (dos_seek(txfd,txpos,SEEK_SET) < 0L) {
  1633.                                             message(6,"!HSEND: File seek error");
  1634.                                             dos_close(txfd);
  1635.                                             txfd = -1;
  1636.                                             txpos = -2L;
  1637.                                             txstate = HTX_EOF;
  1638.                                             break;
  1639.                                          }
  1640.                                       }
  1641.                                       txstate = HTX_XDATA;
  1642.                                    }
  1643.                                    else {
  1644.                                       dos_close(txfd);
  1645.                                       if (txpos == -1L) {
  1646.                                          hydra_gotoxy(29,1);
  1647.                                          hydra_printf("They already have file");
  1648.                                          message(1,"+HSEND: They already have %s",txfname);
  1649.                                          if (mailer)
  1650.                                             resultlog(true,txpathname,txfsize,0L);
  1651.                                          return (XFER_OK);
  1652.                                       }
  1653.                                       else {  /* (txpos < -1L) file NOT sent */
  1654.                                          hydra_gotoxy(29,1);
  1655.                                          hydra_printf("Skipping");
  1656.                                          message(1,"+HSEND: Skipping %s",txfname);
  1657.                                          return (XFER_SKIP);
  1658.                                       }
  1659.                                    }
  1660.                                 }
  1661.                              }
  1662.                              break;
  1663.  
  1664.                         /*---------------------------------------------------*/
  1665.                         case HPKT_DATA:
  1666.                              if (rxstate == HRX_DATA) {
  1667.                                 if (intell(h_long1(rxbuf)) != rxpos ||
  1668.                                     intell(h_long1(rxbuf)) < 0L) {
  1669.                                    if (intell(h_long1(rxbuf)) <= rxlastsync) {
  1670.                                       rxtimer = h_timer_reset();
  1671.                                       rxretries = 0;
  1672.                                    }
  1673.                                    rxlastsync = intell(h_long1(rxbuf));
  1674.  
  1675.                                    if (!h_timer_running(rxtimer) ||
  1676.                                        h_timer_expired(rxtimer)) {
  1677.                                       if (rxretries > 4) {
  1678.                                          if (txstate < HTX_REND &&
  1679.                                              !originator && !hdxlink) {
  1680.                                             hdxlink = true;
  1681.                                             rxretries = 0;
  1682.                                          }
  1683.                                       }
  1684.                                       if (++rxretries > max_retries) {
  1685.                                          message(3,"-HRECV: Too many errors");
  1686.                                          txstate = HTX_DONE;
  1687.                                          res = XFER_ABORT;
  1688.                                          break;
  1689.                                       }
  1690.                                       if (rxretries == 1)
  1691.                                          rxsyncid++;
  1692.  
  1693.                                       rxblklen /= 2;
  1694.                                       i = rxblklen;
  1695.                                       if      (i <=  64) i =   64;
  1696.                                       else if (i <= 128) i =  128;
  1697.                                       else if (i <= 256) i =  256;
  1698.                                       else if (i <= 512) i =  512;
  1699.                                       else               i = 1024;
  1700.                                       message(0,"-HRECV: Bad pkt at %ld - Retry %u (newblklen=%u)",
  1701.                                               rxpos,rxretries,i);
  1702.                                       h_long1(txbufin) = intell(rxpos);
  1703.                                       h_long2(txbufin) = intell((long) i);
  1704.                                       h_long3(txbufin) = intell(rxsyncid);
  1705.                                       txpkt(3 * ((int) sizeof(long)),HPKT_RPOS);
  1706.                                       rxtimer = h_timer_set(timeout);
  1707.                                    }
  1708.                                 }
  1709.                                 else {
  1710.                                    braindead = h_timer_set(H_BRAINDEAD);
  1711.                                    rxpktlen -= (int) sizeof (long);
  1712.                                    rxblklen = rxpktlen;
  1713.                                    if (dos_write(rxfd,rxbuf + ((int) sizeof (long)),rxpktlen) < 0) {
  1714.                                       message(6,"!HRECV: File write error");
  1715.                                       hydra_badxfer();
  1716.                                       rxpos = -2L;
  1717.                                       rxretries = 1;
  1718.                                       rxsyncid++;
  1719.                                       h_long1(txbufin) = intell(rxpos);
  1720.                                       h_long2(txbufin) = intell(0L);
  1721.                                       h_long3(txbufin) = intell(rxsyncid);
  1722.                                       txpkt(3 * ((int) sizeof(long)),HPKT_RPOS);
  1723.                                       rxtimer = h_timer_set(timeout);
  1724.                                       break;
  1725.                                    }
  1726.                                    rxretries = 0;
  1727.                                    rxtimer = h_timer_reset();
  1728.                                    rxlastsync = rxpos;
  1729.                                    rxpos += rxpktlen;
  1730.                                    if (rxwindow) {
  1731.                                       h_long1(txbufin) = intell(rxpos);
  1732.                                       txpkt((int) sizeof(long),HPKT_DATAACK);
  1733.                                    }
  1734.                                    if (!rxstart)
  1735.                                       rxstart = time(NULL) -
  1736.                                                 ((rxpktlen * 10) / cur_speed);
  1737.                                    hydra_status(false);
  1738.                                 }/*badpkt*/
  1739.                              }/*rxstate==HRX_DATA*/
  1740.                              break;
  1741.  
  1742.                         /*---------------------------------------------------*/
  1743.                         case HPKT_DATAACK:
  1744.                              if (txstate == HTX_XDATA || txstate == HTX_DATAACK ||
  1745.                                  txstate == HTX_XWAIT ||
  1746.                                  txstate == HTX_EOF || txstate == HTX_EOFACK) {
  1747.                                 if (txwindow && intell(h_long1(rxbuf)) > txlastack) {
  1748.                                    txlastack = intell(h_long1(rxbuf));
  1749.                                    if (txstate == HTX_DATAACK &&
  1750.                                        (txpos < (txlastack + txwindow))) {
  1751.                                       txstate = HTX_XDATA;
  1752.                                       txretries = 0;
  1753.                                       txtimer = h_timer_reset();
  1754.                                    }
  1755.                                 }
  1756.                              }
  1757.                              break;
  1758.  
  1759.                         /*---------------------------------------------------*/
  1760.                         case HPKT_RPOS:
  1761.                              if (txstate == HTX_XDATA || txstate == HTX_DATAACK ||
  1762.                                  txstate == HTX_XWAIT ||
  1763.                                  txstate == HTX_EOF || txstate == HTX_EOFACK) {
  1764.                                 if (intell(h_long3(rxbuf)) != txsyncid) {
  1765.                                    txsyncid = intell(h_long3(rxbuf));
  1766.                                    txretries = 1;
  1767.                                    txtimer = h_timer_reset();
  1768.                                    txpos = intell(h_long1(rxbuf));
  1769.                                    if (txpos < 0L) {
  1770.                                       if (txfd >= 0) {
  1771.                                          hydra_gotoxy(29,1);
  1772.                                          hydra_printf("Skipping");
  1773.                                          message(1,"+HSEND: Skipping %s",txfname);
  1774.                                          dos_close(txfd);
  1775.                                          txfd = -1;
  1776.                                          txstate = HTX_EOF;
  1777.                                       }
  1778.                                       txpos = -2L;
  1779.                                       break;
  1780.                                    }
  1781.  
  1782.                                    if (txblklen > intell(h_long2(rxbuf)))
  1783.                                       txblklen = (word) intell(h_long2(rxbuf));
  1784.                                    else
  1785.                                       txblklen >>= 1;
  1786.                                    if      (txblklen <=  64) txblklen =   64;
  1787.                                    else if (txblklen <= 128) txblklen =  128;
  1788.                                    else if (txblklen <= 256) txblklen =  256;
  1789.                                    else if (txblklen <= 512) txblklen =  512;
  1790.                                    else                      txblklen = 1024;
  1791.                                    txgoodbytes = 0;
  1792.                                    txgoodneeded += 1024;
  1793.                                    if (txgoodneeded > 8192)
  1794.                                       txgoodneeded = 8192;
  1795.  
  1796.                                    hydra_status(true);
  1797.                                    message(0,"+HSEND: Resending from offset %ld (newblklen=%u)",
  1798.                                            txpos,txblklen);
  1799.                                    if (dos_seek(txfd,txpos,SEEK_SET) < 0L) {
  1800.                                       message(6,"!HSEND: File seek error");
  1801.                                       dos_close(txfd);
  1802.                                       txfd = -1;
  1803.                                       txpos = -2L;
  1804.                                       txstate = HTX_EOF;
  1805.                                       break;
  1806.                                    }
  1807.  
  1808.                                    if (txstate != HTX_XWAIT)
  1809.                                       txstate = HTX_XDATA;
  1810.                                 }
  1811.                                 else {
  1812.                                    if (++txretries > max_retries) {
  1813.                                       message(3,"-HSEND: Too many errors");
  1814.                                       txstate = HTX_DONE;
  1815.                                       res = XFER_ABORT;
  1816.                                       break;
  1817.                                    }
  1818.                                 }
  1819.                              }
  1820.                              break;
  1821.  
  1822.                         /*---------------------------------------------------*/
  1823.                         case HPKT_EOF:
  1824.                              if (rxstate == HRX_DATA) {
  1825.                                 if (intell(h_long1(rxbuf)) < 0L) {
  1826.                                    hydra_badxfer();
  1827.                                    hydra_gotoxy(29,2);
  1828.                                    hydra_printf("Skipping");
  1829.                                    hydra_clreol();
  1830.                                    message(1,"+HRECV: Skipping %s",rxfname);
  1831.                                    rxstate = HRX_FINFO;
  1832.                                    braindead = h_timer_set(H_BRAINDEAD);
  1833.                                 }
  1834.                                 else if (intell(h_long1(rxbuf)) != rxpos) {
  1835.                                    if (intell(h_long1(rxbuf)) <= rxlastsync) {
  1836.                                       rxtimer = h_timer_reset();
  1837.                                       rxretries = 0;
  1838.                                    }
  1839.                                    rxlastsync = intell(h_long1(rxbuf));
  1840.  
  1841.                                    if (!h_timer_running(rxtimer) ||
  1842.                                        h_timer_expired(rxtimer)) {
  1843.                                       if (++rxretries > max_retries) {
  1844.                                          message(3,"-HRECV: Too many errors");
  1845.                                          txstate = HTX_DONE;
  1846.                                          res = XFER_ABORT;
  1847.                                          break;
  1848.                                       }
  1849.                                       if (rxretries == 1)
  1850.                                          rxsyncid++;
  1851.  
  1852.                                       rxblklen /= 2;
  1853.                                       i = rxblklen;
  1854.                                       if      (i <=  64) i =   64;
  1855.                                       else if (i <= 128) i =  128;
  1856.                                       else if (i <= 256) i =  256;
  1857.                                       else if (i <= 512) i =  512;
  1858.                                       else               i = 1024;
  1859.                                       message(0,"-HRECV: Bad EOF at %ld - Retry %u (newblklen=%u)",
  1860.                                               rxpos,rxretries,i);
  1861.                                       h_long1(txbufin) = intell(rxpos);
  1862.                                       h_long2(txbufin) = intell((long) i);
  1863.                                       h_long3(txbufin) = intell(rxsyncid);
  1864.                                       txpkt(3 * ((int) sizeof(long)),HPKT_RPOS);
  1865.                                       rxtimer = h_timer_set(timeout);
  1866.                                    }
  1867.                                 }
  1868.                                 else {
  1869.                                    rxfsize = rxpos;
  1870.                                    dos_close(rxfd);
  1871.                                    rxfd = -1;
  1872.                                    hydra_pct(false);
  1873.  
  1874.                                    p = xfer_okay();
  1875.                                    if (p) {
  1876.                                       hydra_gotoxy(25,2);
  1877.                                       hydra_printf("  -> %s",p);
  1878.                                       message(1,"+HRECV: Dup file renamed: %s",p);
  1879.                                    }
  1880.  
  1881.                                    hydra_status(false);
  1882.                                    message(1,"+Rcvd-H %s",p ? p : rxfname);
  1883.                                    resultlog(false,p ? p : rxfname,rxfsize - rxoffset,time(NULL) - rxstart);
  1884.                                    rxstate = HRX_FINFO;
  1885.                                    braindead = h_timer_set(H_BRAINDEAD);
  1886.                                 }/*skip/badeof/eof*/
  1887.                              }/*rxstate==HRX_DATA*/
  1888.  
  1889.                              if (rxstate == HRX_FINFO)
  1890.                                 txpkt(0,HPKT_EOFACK);
  1891.                              break;
  1892.  
  1893.                         /*---------------------------------------------------*/
  1894.                         case HPKT_EOFACK:
  1895.                              if (txstate == HTX_EOF || txstate == HTX_EOFACK) {
  1896.                                 braindead = h_timer_set(H_BRAINDEAD);
  1897.                                 if (txfd >= 0) {
  1898.                                    txfsize = txpos;
  1899.                                    dos_close(txfd);
  1900.                                    hydra_pct(true);
  1901.                                    resultlog(true,txpathname,txfsize - txoffset,time(NULL) - txstart);
  1902.                                    return (XFER_OK);
  1903.                                 }
  1904.                                 else
  1905.                                    return (XFER_SKIP);
  1906.                              }
  1907.                              break;
  1908.  
  1909.                         /*---------------------------------------------------*/
  1910.                         case HPKT_IDLE:
  1911.                              if (txstate == HTX_XWAIT) {
  1912.                                 hdxlink = false;
  1913.                                 txtimer = h_timer_reset();
  1914.                                 txretries = 0;
  1915.                                 txstate = HTX_XDATA;
  1916.                              }
  1917.                              else if (txstate >= HTX_FINFO && txstate < HTX_REND)
  1918.                                 braindead = h_timer_set(H_BRAINDEAD);
  1919.                              break;
  1920.  
  1921.                         /*---------------------------------------------------*/
  1922.                         case HPKT_END:
  1923.                              /* special for chat, other side wants to quit */
  1924.                              if (chattimer > 0L && txstate == HTX_REND) {
  1925.                                 chattimer = -3L;
  1926.                                 break;
  1927.                              }
  1928.  
  1929.                              if (txstate == HTX_END || txstate == HTX_ENDACK) {
  1930.                                 txpkt(0,HPKT_END);
  1931.                                 txpkt(0,HPKT_END);
  1932.                                 txpkt(0,HPKT_END);
  1933.                                 message(1,"+HYDRA: Completed");
  1934.                                 txstate = HTX_DONE;
  1935.                                 res = XFER_OK;
  1936.                              }
  1937.                              break;
  1938.  
  1939.                         /*---------------------------------------------------*/
  1940.                         case HPKT_DEVDATA:
  1941.                              if (devrxid != intell(h_long1(rxbuf))) {
  1942.                                 hydra_devrecv();
  1943.                                 devrxid = intell(h_long1(rxbuf));
  1944.                              }
  1945.                              h_long1(txbufin) = intell(devrxid);
  1946.                              txpkt((int) sizeof (long),HPKT_DEVDACK);
  1947.                              break;
  1948.  
  1949.                         /*---------------------------------------------------*/
  1950.                         case HPKT_DEVDACK:
  1951.                              if (devtxstate && (devtxid == intell(h_long1(rxbuf)))) {
  1952.                                 devtxtimer = h_timer_reset();
  1953.                                 devtxstate = HTD_DONE;
  1954.                              }
  1955.                              break;
  1956.  
  1957.                         /*---------------------------------------------------*/
  1958.                         default:  /* unknown packet types: IGNORE, no error! */
  1959.                              break;
  1960.  
  1961.                         /*---------------------------------------------------*/
  1962.                  }/*switch(pkttype)*/
  1963.  
  1964.                  /*----------------------------------------------------------*/
  1965.                  switch (txstate) {
  1966.                         /*---------------------------------------------------*/
  1967.                         case HTX_START:
  1968.                         case HTX_SWAIT:
  1969.                              if (rxstate == HRX_FINFO) {
  1970.                                 txtimer = h_timer_reset();
  1971.                                 txretries = 0;
  1972.                                 txstate = HTX_INIT;
  1973.                              }
  1974.                              break;
  1975.  
  1976.                         /*---------------------------------------------------*/
  1977.                         case HTX_RINIT:
  1978.                              if (rxstate == HRX_FINFO) {
  1979.                                 txtimer = h_timer_reset();
  1980.                                 txretries = 0;
  1981.                                 txstate = HTX_FINFO;
  1982.                              }
  1983.                              break;
  1984.  
  1985.                         /*---------------------------------------------------*/
  1986.                         case HTX_XDATA:
  1987.                              if (rxstate && hdxlink) {
  1988.                                 message(3,"*HYDRA: %s",hdxmsg);
  1989.                                 hydra_devsend("MSG",(byte *) hdxmsg,(int) strlen(hdxmsg));
  1990.  
  1991.                                 txtimer = h_timer_set(H_IDLE);
  1992.                                 txstate = HTX_XWAIT;
  1993.                              }
  1994.                              break;
  1995.  
  1996.                         /*---------------------------------------------------*/
  1997.                         case HTX_XWAIT:
  1998.                              if (!rxstate) {
  1999.                                 txtimer = h_timer_reset();
  2000.                                 txretries = 0;
  2001.                                 txstate = HTX_XDATA;
  2002.                              }
  2003.                              break;
  2004.  
  2005.                         /*---------------------------------------------------*/
  2006.                         case HTX_REND:
  2007.                              if (!rxstate && !devtxstate) {
  2008.                                 /* special for chat, braindead will protect */
  2009.                                 if (chattimer > 0L) break;
  2010.                                 if (chattimer == 0L) chattimer = -3L;
  2011.  
  2012.                                 txtimer = h_timer_reset();
  2013.                                 txretries = 0;
  2014.                                 txstate = HTX_END;
  2015.                              }
  2016.                              break;
  2017.  
  2018.                         /*---------------------------------------------------*/
  2019.                  }/*switch(txstate)*/
  2020.            }/*while(txstate&&pkttype)*/
  2021.         } while (txstate);
  2022.  
  2023.         if (txfd >= 0)
  2024.            dos_close(txfd);
  2025.         hydra_badxfer();
  2026.  
  2027.         if (res == XFER_ABORT) {
  2028.            com_dump();
  2029.            if (carrier()) {
  2030.               com_putblock((byte *) abortstr,(int) strlen(abortstr));
  2031.               com_flush();
  2032.            }
  2033.            com_purge();
  2034.         }
  2035.         else
  2036.            com_flush();
  2037.  
  2038.         return (res);
  2039. }/*hydra()*/
  2040.  
  2041.  
  2042. /* end of hydra.c */
  2043.