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Commits (1)
bcc32 -I..\xpdev;..\sbbs3 stp.c zmodem.c ..\xpdev\dirwrap.c ..\xpdev\genwrap.c ..\xpdev\sockwrap.c ..\sbbs3\crc16.c ..\sbbs3\crc32.c ..\sbbs3\telnet.c
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/*
* zmodem.h
* zmodem constants
* (C) Mattheij Computer Service 1994
*/
#ifndef _ZMODEM_H
#define _ZMODEM_H
/*
* ascii constants
*/
#ifndef SOH
#define SOH 0x01
#define STX 0x02
#define EOT 0x04
#define ENQ 0x05
#define ACK 0x06
#if 0
#define LF 0x0a
#define CR 0x0d
#endif
#define XON 0x11
#define XOFF 0x13
#define NAK 0x15
#define CAN 0x18
#endif
/*
* zmodem constants
*/
#define ZMAXHLEN 0x10 /* maximum header information length */
#define ZMAXSPLEN 0x400 /* maximum subpacket length */
#define ZPAD 0x2a /* pad character; begins frames */
#define ZDLE 0x18 /* ctrl-x zmodem escape */
#define ZDLEE 0x58 /* escaped ZDLE */
#define ZBIN 0x41 /* binary frame indicator (CRC16) */
#define ZHEX 0x42 /* hex frame indicator */
#define ZBIN32 0x43 /* binary frame indicator (CRC32) */
#define ZBINR32 0x44 /* run length encoded binary frame (CRC32) */
#define ZVBIN 0x61 /* binary frame indicator (CRC16) */
#define ZVHEX 0x62 /* hex frame indicator */
#define ZVBIN32 0x63 /* binary frame indicator (CRC32) */
#define ZVBINR32 0x64 /* run length encoded binary frame (CRC32) */
#define ZRESC 0x7e /* run length encoding flag / escape character */
/*
* zmodem frame types
*/
#define ZRQINIT 0x00 /* request receive init (s->r) */
#define ZRINIT 0x01 /* receive init (r->s) */
#define ZSINIT 0x02 /* send init sequence (optional) (s->r) */
#define ZACK 0x03 /* ack to ZRQINIT ZRINIT or ZSINIT (s<->r) */
#define ZFILE 0x04 /* file name (s->r) */
#define ZSKIP 0x05 /* skip this file (r->s) */
#define ZNAK 0x06 /* last packet was corrupted (?) */
#define ZABORT 0x07 /* abort batch transfers (?) */
#define ZFIN 0x08 /* finish session (s<->r) */
#define ZRPOS 0x09 /* resume data transmission here (r->s) */
#define ZDATA 0x0a /* data packet(s) follow (s->r) */
#define ZEOF 0x0b /* end of file reached (s->r) */
#define ZFERR 0x0c /* fatal read or write error detected (?) */
#define ZCRC 0x0d /* request for file CRC and response (?) */
#define ZCHALLENGE 0x0e /* security challenge (r->s) */
#define ZCOMPL 0x0f /* request is complete (?) */
#define ZCAN 0x10 /* pseudo frame;
other end cancelled session with 5* CAN */
#define ZFREECNT 0x11 /* request free bytes on file system (s->r) */
#define ZCOMMAND 0x12 /* issue command (s->r) */
#define ZSTDERR 0x13 /* output data to stderr (??) */
/*
* ZDLE sequences
*/
#define ZCRCE 0x68 /* CRC next, frame ends, header packet follows */
#define ZCRCG 0x69 /* CRC next, frame continues nonstop */
#define ZCRCQ 0x6a /* CRC next, frame continuous, ZACK expected */
#define ZCRCW 0x6b /* CRC next, frame ends, ZACK expected */
#define ZRUB0 0x6c /* translate to rubout 0x7f */
#define ZRUB1 0x6d /* translate to rubout 0xff */
/*
* frame specific data.
* entries are prefixed with their location in the header array.
*/
/*
* Byte positions within header array
*/
#define FTYPE 0 /* frame type */
#define ZF0 4 /* First flags byte */
#define ZF1 3
#define ZF2 2
#define ZF3 1
#define ZP0 1 /* Low order 8 bits of position */
#define ZP1 2
#define ZP2 3
#define ZP3 4 /* High order 8 bits of file position */
/*
* ZRINIT frame
* zmodem receiver capability flags
*/
#define ZF0_CANFDX 0x01 /* Receiver can send and receive true full duplex */
#define ZF0_CANOVIO 0x02 /* receiver can receive data during disk I/O */
#define ZF0_CANBRK 0x04 /* receiver can send a break signal */
#define ZF0_CANCRY 0x08 /* Receiver can decrypt DONT USE */
#define ZF0_CANLZW 0x10 /* Receiver can uncompress DONT USE */
#define ZF0_CANFC32 0x20 /* Receiver can use 32 bit Frame Check */
#define ZF0_ESCCTL 0x40 /* Receiver expects ctl chars to be escaped */
#define ZF0_ESC8 0x80 /* Receiver expects 8th bit to be escaped */
#define ZF1_CANVHDR 0x01 /* Variable headers OK */
/*
* ZSINIT frame
* zmodem sender capability
*/
#define ZF0_TESCCTL 0x40 /* Transmitter expects ctl chars to be escaped */
#define ZF0_TESC8 0x80 /* Transmitter expects 8th bit to be escaped */
#define ZATTNLEN 0x20 /* Max length of attention string */
#define ALTCOFF ZF1 /* Offset to alternate canit string, 0 if not used */
/*
* ZFILE frame
*/
/*
* Conversion options one of these in ZF0
*/
#define ZF0_ZCBIN 1 /* Binary transfer - inhibit conversion */
#define ZF0_ZCNL 2 /* Convert NL to local end of line convention */
#define ZF0_ZCRESUM 3 /* Resume interrupted file transfer */
/*
* Management include options, one of these ored in ZF1
*/
#define ZF1_ZMSKNOLOC 0x80 /* Skip file if not present at rx */
#define ZF1_ZMMASK 0x1f /* Mask for the choices below */
#define ZF1_ZMNEWL 1 /* Transfer if source newer or longer */
#define ZF1_ZMCRC 2 /* Transfer if different file CRC or length */
#define ZF1_ZMAPND 3 /* Append contents to existing file (if any) */
#define ZF1_ZMCLOB 4 /* Replace existing file */
#define ZF1_ZMNEW 5 /* Transfer if source newer */
#define ZF1_ZMDIFF 6 /* Transfer if dates or lengths different */
#define ZF1_ZMPROT 7 /* Protect destination file */
#define ZF1_ZMCHNG 8 /* Change filename if destination exists */
/*
* Transport options, one of these in ZF2
*/
#define ZF2_ZTNOR 0 /* no compression */
#define ZF2_ZTLZW 1 /* Lempel-Ziv compression */
#define ZF2_ZTRLE 3 /* Run Length encoding */
/*
* Extended options for ZF3, bit encoded
*/
#define ZF3_ZCANVHDR 0x01 /* Variable headers OK */
/* Receiver window size override */
#define ZF3_ZRWOVR 0x04 /* byte position for receive window override/256 */
#define ZF3_ZXSPARS 0x40 /* encoding for sparse file operations */
/*
* ZCOMMAND frame
*/
#define ZF0_ZCACK1 0x01 /* Acknowledge, then do command */
typedef struct {
SOCKET sock; /* socket descriptor */
unsigned char rxd_header[ZMAXHLEN]; /* last received header */
int rxd_header_len; /* last received header size */
/*
* receiver capability flags
* extracted from the ZRINIT frame as received
*/
int can_full_duplex;
int can_overlap_io;
int can_break;
int can_fcs_32;
int want_fcs_16;
int escape_all_control_characters; /* guess */
int escape_8th_bit;
int use_variable_headers; /* use variable length headers */
/*
* file management options.
* only one should be on
*/
int management_newer;
int management_clobber;
int management_protect;
/* from zmtx.c */
#define MAX_SUBPACKETSIZE 1024
int n_files_remaining;
int n_bytes_remaining;
unsigned char tx_data_subpacket[MAX_SUBPACKETSIZE];
long current_file_size;
time_t transfer_start;
int receive_32_bit_data;
int raw_trace;
int use_crc16;
long ack_file_pos; /* file position used in acknowledgement of correctly */
/* received data subpackets */
int last_sent;
int n_cans;
long mode;
} zmodem_t;
#endif