/* zmodem.h - ZMODEM protocol constants
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Copyright (C) until 1998 Chuck Forsberg (OMEN Technology Inc)
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Copyright (C) 1996, 1997 Uwe Ohse
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA.
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* 05-23-87 Chuck Forsberg Omen Technology Inc
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*/
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#define ZPAD '*' /* 052 Padding character begins frames */
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#define ZDLE 030 /* Ctrl-X Zmodem escape - `ala BISYNC DLE */
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#define ZDLEE (ZDLE^0100) /* Escaped ZDLE as transmitted */
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#define ZBIN 'A' /* Binary frame indicator */
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#define ZHEX 'B' /* HEX frame indicator */
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#define ZBIN32 'C' /* Binary frame with 32 bit FCS */
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/* Frame types (see array "frametypes" in zm.c) */
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#define ZRQINIT 0 /* Request receive init */
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#define ZRINIT 1 /* Receive init */
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#define ZSINIT 2 /* Send init sequence (optional) */
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#define ZACK 3 /* ACK to above */
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#define ZFILE 4 /* File name from sender */
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#define ZSKIP 5 /* To sender: skip this file */
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#define ZNAK 6 /* Last packet was garbled */
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#define ZABORT 7 /* Abort batch transfers */
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#define ZFIN 8 /* Finish session */
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#define ZRPOS 9 /* Resume data trans at this position */
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#define ZDATA 10 /* Data packet(s) follow */
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#define ZEOF 11 /* End of file */
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#define ZFERR 12 /* Fatal Read or Write error Detected */
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#define ZCRC 13 /* Request for file CRC and response */
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#define ZCHALLENGE 14 /* Receiver's Challenge */
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#define ZCOMPL 15 /* Request is complete */
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#define ZCAN 16 /* Other end canned session with CAN*5 */
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#define ZFREECNT 17 /* Request for free bytes on filesystem */
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#define ZCOMMAND 18 /* Command from sending program */
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#define ZSTDERR 19 /* Output to standard error, data follows */
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/* ZDLE sequences */
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#define ZCRCE 'h' /* CRC next, frame ends, header packet follows */
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#define ZCRCG 'i' /* CRC next, frame continues nonstop */
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#define ZCRCQ 'j' /* CRC next, frame continues, ZACK expected */
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#define ZCRCW 'k' /* CRC next, ZACK expected, end of frame */
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#define ZRUB0 'l' /* Translate to rubout 0177 */
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#define ZRUB1 'm' /* Translate to rubout 0377 */
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/* zdlread return values (internal) */
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/* -1 is general error, -2 is timeout */
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#define GOTOR 0400
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#define GOTCRCE (ZCRCE|GOTOR) /* ZDLE-ZCRCE received */
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#define GOTCRCG (ZCRCG|GOTOR) /* ZDLE-ZCRCG received */
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#define GOTCRCQ (ZCRCQ|GOTOR) /* ZDLE-ZCRCQ received */
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#define GOTCRCW (ZCRCW|GOTOR) /* ZDLE-ZCRCW received */
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#define GOTCAN (GOTOR|030) /* CAN*5 seen */
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/* Byte positions within header array */
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#define ZF0 3 /* First flags byte */
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#define ZF1 2
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#define ZF2 1
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#define ZF3 0
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#define ZP0 0 /* Low order 8 bits of position */
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#define ZP1 1
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#define ZP2 2
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#define ZP3 3 /* High order 8 bits of file position */
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/* Bit Masks for ZRINIT flags byte ZF0 */
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#define CANFDX 0x01 /* Rx can send and receive true FDX */
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#define CANOVIO 0x02 /* Rx can receive data during disk I/O */
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#define CANBRK 0x04 /* Rx can send a break signal */
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#define CANCRY 0x08 /* Receiver can decrypt */
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#define CANLZW 0x10 /* Receiver can uncompress */
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#define CANFC32 0x20 /* Receiver can use 32 bit Frame Check */
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#define ESCCTL 0x40 /* Receiver expects ctl chars to be escaped */
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#define ESC8 0x80 /* Receiver expects 8th bit to be escaped */
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/* Bit Masks for ZRINIT flags byze ZF1 */
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#define ZF1_CANVHDR 0x01 /* Variable headers OK, unused in lrzsz */
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#define ZF1_TIMESYNC 0x02 /* nonstandard, Receiver request timesync */
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/* Parameters for ZSINIT frame */
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#define ZATTNLEN 32 /* Max length of attention string */
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/* Bit Masks for ZSINIT flags byte ZF0 */
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#define TESCCTL 0100 /* Transmitter expects ctl chars to be escaped */
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#define TESC8 0200 /* Transmitter expects 8th bit to be escaped */
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/* Parameters for ZFILE frame */
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/* Conversion options one of these in ZF0 */
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#define ZCBIN 1 /* Binary transfer - inhibit conversion */
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#define ZCNL 2 /* Convert NL to local end of line convention */
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#define ZCRESUM 3 /* Resume interrupted file transfer */
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/* Management include options, one of these ored in ZF1 */
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#define ZF1_ZMSKNOLOC 0x80 /* Skip file if not present at rx */
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/* Management options, one of these ored in ZF1 */
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#define ZF1_ZMMASK 0x1f /* Mask for the choices below */
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#define ZF1_ZMNEWL 1 /* Transfer if source newer or longer */
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#define ZF1_ZMCRC 2 /* Transfer if different file CRC or length */
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#define ZF1_ZMAPND 3 /* Append contents to existing file (if any) */
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#define ZF1_ZMCLOB 4 /* Replace existing file */
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#define ZF1_ZMNEW 5 /* Transfer if source newer */
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/* Number 5 is alive ... */
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#define ZF1_ZMDIFF 6 /* Transfer if dates or lengths different */
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#define ZF1_ZMPROT 7 /* Protect destination file */
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#define ZF1_ZMCHNG 8 /* Change filename if destination exists */
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/* Transport options, one of these in ZF2 */
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#define ZTLZW 1 /* Lempel-Ziv compression */
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#define ZTCRYPT 2 /* Encryption */
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#define ZTRLE 3 /* Run Length encoding */
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/* Extended options for ZF3, bit encoded */
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#define ZXSPARS 64 /* Encoding for sparse file operations */
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/* Parameters for ZCOMMAND frame ZF0 (otherwise 0) */
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#define ZCACK1 1 /* Acknowledge, then do command */
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/* Globals used by ZMODEM functions */
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#if 0
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extern int Rxframeind; /* ZBIN ZBIN32, or ZHEX type of frame received */
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extern int Rxtype; /* Type of header received */
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extern int Zrwindow; /* RX window size (controls garbage count) */
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extern char Rxhdr[4]; /* Received header */
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extern char Txhdr[4]; /* Transmitted header */
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extern long Txpos; /* Transmitted file position */
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extern int Txfcs32; /* TURE means send binary frames with 32 bit FCS */
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extern int Crc32t; /* Display flag indicating 32 bit CRC being sent */
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extern int Crc32; /* Display flag indicating 32 bit CRC being received */
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extern int Znulls; /* Number of nulls to send at beginning of ZDATA hdr */
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extern char Attn[ZATTNLEN+1]; /* Attention string rx sends to tx on err */
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#endif
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/* End of ZMODEM.H */
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