191 lines
8.0 KiB
C
191 lines
8.0 KiB
C
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#ifndef _ZMMISC_H
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#define _ZMMISC_H
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/* $Id: zmmisc.h,v 1.15 2006/03/18 18:32:23 mbse Exp $ */
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#ifndef OK
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#define OK 0
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#endif
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#define MAXBLOCK 8192
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/*
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* Z M O D E M . H Manifest constants for ZMODEM
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* application to application file transfer protocol
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* 04-17-89 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 (CRC-16) */
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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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#define ZBINR32 'D' /* RLE packed Binary frame with 32 bit FCS */
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#define ZVBIN 'a' /* Binary frame indicator (CRC-16) */
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#define ZVHEX 'b' /* HEX frame indicator */
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#define ZVBIN32 'c' /* Binary frame with 32 bit FCS */
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#define ZVBINR32 'd' /* RLE packed Binary frame with 32 bit FCS */
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#define ZRESC 0176 /* RLE flag/escape character */
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#define ZMAXHLEN 16 /* Max header information length NEVER CHANGE */
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#define ZMAXSPLEN 1024 /* Max subpacket length NEVER CHANGE */
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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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/* Parameters for ZRINIT header */
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#define ZRPXWN 8 /* 9th byte in header contains window size/256 */
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#define ZRPXQQ 9 /* 10th to 14th bytes contain quote mask */
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/* Bit Masks for ZRINIT flags byte ZF0 */
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#define CANFDX 01 /* Rx can send and receive true FDX */
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#define CANOVIO 02 /* Rx can receive data during disk I/O */
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#define CANBRK 04 /* Rx can send a break signal */
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#define CANRLE 010 /* Receiver can decode RLE */
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#define CANLZW 020 /* Receiver can uncompress */
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#define CANFC32 040 /* Receiver can use 32 bit Frame Check */
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#define ESCCTL 0100 /* Receiver expects ctl chars to be escaped */
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#define ESC8 0200 /* Receiver expects 8th bit to be escaped */
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/* Bit Masks for ZRINIT flags byte ZF1 */
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#define CANVHDR 01 /* Variable headers OK */
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#define ZRRQWN 8 /* Receiver specified window size in ZRPXWN */
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#define ZRRQQQ 16 /* Additional control chars to quote in ZRPXQQ */
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#define ZRQNVH (ZRRQWN|ZRRQQQ) /* Variable len hdr reqd to access info */
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/* Parameters for ZSINIT frame */
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#define ZATTNLEN 32 /* Max length of attention string */
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#define ALTCOFF ZF1 /* Offset to alternate canit string, 0 if not used */
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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 ZMSKNOLOC 0200 /* Skip file if not present at rx */
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/* Management options, one of these ored in ZF1 */
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#define ZMMASK 037 /* Mask for the choices below */
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#define ZMNEWL 1 /* Transfer if source newer or longer */
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#define ZMCRC 2 /* Transfer if different file CRC or length */
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#define ZMAPND 3 /* Append contents to existing file (if any) */
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#define ZMCLOB 4 /* Replace existing file */
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#define ZMNEW 5 /* Transfer if source newer */
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/* Number 5 is alive ... */
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#define ZMDIFF 6 /* Transfer if dates or lengths different */
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#define ZMPROT 7 /* Protect destination file */
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#define 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 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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#define ZCANVHDR 01 /* Variable headers OK */
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/* Receiver window size override */
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#define ZRWOVR 4 /* byte position for receive window override/256 */
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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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int Rxframeind; /* ZBIN ZBIN32, or ZHEX type of frame */
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int Rxtype; /* Type of header received */
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int Rxcount; /* Count of data bytes received */
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int Rxpos; /* Received file position */
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int Txpos; /* Transmitted file position */
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int Txfcs32; /* TURE means send binary frames with 32 bit FCS */
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int Crc32t; /* Display flag indicating 32 bit CRC being sent */
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int Crc32r; /* Display flag indicating 32 bit CRC being received */
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int Znulls; /* Number of nulls to send at beginning of ZDATA hdr */
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char Rxhdr[ZMAXHLEN]; /* Received header */
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char Txhdr[ZMAXHLEN]; /* Transmitted header */
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char Attn[ZATTNLEN+1]; /* Attention string rx sends to tx on err */
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char *Altcan; /* Alternate canit string */
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char Zsendmask[33]; /* Additional control characters to mask */
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int Zctlesc;
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enum zm_type_enum {
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ZM_XMODEM,
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ZM_YMODEM,
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ZM_ZMODEM
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};
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enum zm_type_enum protocol;
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void get_frame_buffer(void);
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void del_frame_buffer(void);
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void zsbhdr(int, char *);
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void zshhdr(int, char *);
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void zsdata(register char *, int, int);
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int zrdata(register char *, int);
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int zrdat32(register char *, int);
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int zgethdr(char *);
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int zrbhdr(register char *);
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void zsendline(int);
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int zdlread(void);
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void stohdr(int);
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int rclhdr(register char *);
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char *protname(void);
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void purgeline(int);
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void canit(int);
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#define FTOFFSET 16
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extern unsigned short crc16xmodemtab[];
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extern unsigned int crc32tab[];
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#define updcrc16(cp,crc) (crc16xmodemtab[(((int)crc >> 8) & 0xff)] ^ (crc << 8) ^ cp)
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#define updcrc32(cp,crc) (crc32tab[((int)crc ^ cp) & 0xff] ^ ((crc >> 8) & 0x00ffffff))
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#endif
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