591 lines
13 KiB
C
591 lines
13 KiB
C
|
/*****************************************************************************
|
||
|
|
*
|
||
|
|
* Purpose ...............: Fidonet mailer
|
||
|
|
*
|
||
|
|
*****************************************************************************
|
||
|
|
* Copyright (C) 1997-2011
|
||
|
|
*
|
||
|
|
* Michiel Broek FIDO: 2:280/2802
|
||
|
|
* Beekmansbos 10
|
||
|
|
* 1971 BV IJmuiden
|
||
|
|
* the Netherlands
|
||
|
|
*
|
||
|
|
* This file is part of MBSE BBS.
|
||
|
|
*
|
||
|
|
* This BBS is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License as published by the
|
||
|
|
* Free Software Foundation; either version 2, or (at your option) any
|
||
|
|
* later version.
|
||
|
|
*
|
||
|
|
* MBSE BBS is distributed in the hope that it will be useful, but
|
||
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with MBSE BBS; see the file COPYING. If not, write to the Free
|
||
|
|
* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
||
|
|
*****************************************************************************/
|
||
|
|
|
||
|
|
#include "../config.h"
|
||
|
|
#include "../lib/mbselib.h"
|
||
|
|
#include "../lib/nodelist.h"
|
||
|
|
#include "session.h"
|
||
|
|
#include "ttyio.h"
|
||
|
|
#include "statetbl.h"
|
||
|
|
#include "config.h"
|
||
|
|
#include "lutil.h"
|
||
|
|
#include "openfile.h"
|
||
|
|
#include "m7recv.h"
|
||
|
|
#include "xmrecv.h"
|
||
|
|
#include "filelist.h"
|
||
|
|
#include "filetime.h"
|
||
|
|
|
||
|
|
|
||
|
|
#define XMBLKSIZ 128
|
||
|
|
|
||
|
|
|
||
|
|
static int xm_recv(void);
|
||
|
|
static int resync(off_t);
|
||
|
|
static int closeit(int);
|
||
|
|
|
||
|
|
static char *recvname=NULL;
|
||
|
|
static char *fpath=NULL;
|
||
|
|
static FILE *fp=NULL;
|
||
|
|
static int last;
|
||
|
|
struct timeval starttime, endtime;
|
||
|
|
struct timezone tz;
|
||
|
|
static off_t startofs;
|
||
|
|
static int recv_blk;
|
||
|
|
|
||
|
|
extern unsigned int rcvdbytes;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
int xmrecv(char *Name)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
Syslog('+', "Xmodem start receive \"%s\"",MBSE_SS(Name));
|
||
|
|
recvname = Name;
|
||
|
|
last = 0;
|
||
|
|
rc = xm_recv();
|
||
|
|
if (fp)
|
||
|
|
closeit(0);
|
||
|
|
if (rc)
|
||
|
|
return -1;
|
||
|
|
else
|
||
|
|
if (last)
|
||
|
|
return 1;
|
||
|
|
else
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
int closeit(int success)
|
||
|
|
{
|
||
|
|
off_t endofs;
|
||
|
|
|
||
|
|
endofs = recv_blk*XMBLKSIZ;
|
||
|
|
gettimeofday(&endtime, &tz);
|
||
|
|
if (success)
|
||
|
|
Syslog('+', "Xmodem: OK %s", transfertime(starttime, endtime, endofs-startofs, FALSE));
|
||
|
|
else
|
||
|
|
Syslog('+', "Xmodem: dropped after %ld bytes", endofs-startofs);
|
||
|
|
rcvdbytes += (unsigned int)(endofs-startofs);
|
||
|
|
fp = NULL;
|
||
|
|
return closefile();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
SM_DECL(xm_recv,(char *)"xmrecv")
|
||
|
|
SM_STATES
|
||
|
|
sendnak0,
|
||
|
|
waitblk0,
|
||
|
|
sendnak,
|
||
|
|
waitblk,
|
||
|
|
recvblk,
|
||
|
|
sendack,
|
||
|
|
checktelink,
|
||
|
|
recvm7,
|
||
|
|
goteof
|
||
|
|
SM_NAMES
|
||
|
|
(char *)"sendnak0",
|
||
|
|
(char *)"waitblk0",
|
||
|
|
(char *)"sendnak",
|
||
|
|
(char *)"waitblk",
|
||
|
|
(char *)"recvblk",
|
||
|
|
(char *)"sendack",
|
||
|
|
(char *)"checktelink",
|
||
|
|
(char *)"recvm7",
|
||
|
|
(char *)"goteof"
|
||
|
|
SM_EDECL
|
||
|
|
|
||
|
|
int tmp, i;
|
||
|
|
int SEAlink = FALSE;
|
||
|
|
int crcmode = session_flags & FTSC_XMODEM_CRC;
|
||
|
|
int count=0,junk=0,cancount=0;
|
||
|
|
int header = 0;
|
||
|
|
struct _xmblk {
|
||
|
|
unsigned char n1,n2;
|
||
|
|
unsigned char data[XMBLKSIZ];
|
||
|
|
unsigned char c1,c2;
|
||
|
|
} xmblk;
|
||
|
|
unsigned short localcrc,remotecrc;
|
||
|
|
unsigned char localcs,remotecs;
|
||
|
|
int ackd_blk=-1L;
|
||
|
|
int next_blk=1L;
|
||
|
|
int last_blk=0L;
|
||
|
|
off_t resofs;
|
||
|
|
char tmpfname[16];
|
||
|
|
off_t wsize;
|
||
|
|
time_t remtime=0L;
|
||
|
|
off_t remsize=0;
|
||
|
|
int goteot = FALSE;
|
||
|
|
|
||
|
|
gettimeofday(&starttime, &tz);
|
||
|
|
recv_blk=-1L;
|
||
|
|
|
||
|
|
memset(&tmpfname, 0, sizeof(tmpfname));
|
||
|
|
if (recvname)
|
||
|
|
strncpy(tmpfname,recvname,sizeof(tmpfname)-1);
|
||
|
|
|
||
|
|
SM_START(sendnak0)
|
||
|
|
|
||
|
|
SM_STATE(sendnak0)
|
||
|
|
|
||
|
|
Syslog('x', "xmrecv SENDNAK0 count=%d mode=%s", count, crcmode?"crc":"cksum");
|
||
|
|
if (count++ > 9) {
|
||
|
|
Syslog('+', "too many errors while xmodem receive init");
|
||
|
|
SM_ERROR;
|
||
|
|
}
|
||
|
|
if ((ackd_blk < 0) && crcmode && (count > 5)) {
|
||
|
|
Syslog('x', "no responce to 'C', try checksum mode");
|
||
|
|
session_flags &= ~FTSC_XMODEM_CRC;
|
||
|
|
crcmode = FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (crcmode)
|
||
|
|
PUTCHAR('C');
|
||
|
|
else
|
||
|
|
PUTCHAR(NAK);
|
||
|
|
junk = 0;
|
||
|
|
SM_PROCEED(waitblk0);
|
||
|
|
|
||
|
|
SM_STATE(waitblk0)
|
||
|
|
|
||
|
|
header = GETCHAR(5);
|
||
|
|
if (header == TIMEOUT) {
|
||
|
|
Syslog('x', "timeout waiting for xmodem block 0 header, count=%d", count);
|
||
|
|
if ((count > 2) && (session_flags & SESSION_IFNA)) {
|
||
|
|
Syslog('+', "Timeout waiting for file in WaZOO session, report success");
|
||
|
|
last=1;
|
||
|
|
SM_SUCCESS;
|
||
|
|
}
|
||
|
|
SM_PROCEED(sendnak0);
|
||
|
|
} else if (header < 0) {
|
||
|
|
Syslog('x', "Error");
|
||
|
|
SM_ERROR;
|
||
|
|
} else {
|
||
|
|
switch (header) {
|
||
|
|
case EOT: Syslog('x', "got EOT");
|
||
|
|
if (ackd_blk == -1L)
|
||
|
|
last=1;
|
||
|
|
else {
|
||
|
|
ackd_blk++;
|
||
|
|
PUTCHAR(ACK);
|
||
|
|
if (SEAlink) {
|
||
|
|
PUTCHAR(ackd_blk);
|
||
|
|
PUTCHAR(~ackd_blk);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (STATUS) {
|
||
|
|
SM_ERROR;
|
||
|
|
}
|
||
|
|
SM_SUCCESS;
|
||
|
|
break;
|
||
|
|
case CAN: Syslog('+', "Got CAN while xmodem receive init");
|
||
|
|
SM_ERROR;
|
||
|
|
break;
|
||
|
|
case SOH: SEAlink = TRUE;
|
||
|
|
Syslog('x', "Got SOH, SEAlink mode");
|
||
|
|
SM_PROCEED(recvblk);
|
||
|
|
break;
|
||
|
|
case SYN: SEAlink = FALSE;
|
||
|
|
Syslog('x', "Got SYN, Telink mode");
|
||
|
|
SM_PROCEED(recvblk);
|
||
|
|
break;
|
||
|
|
case ACK: SEAlink = FALSE;
|
||
|
|
Syslog('x', "Got ACK, Modem7 mode");
|
||
|
|
SM_PROCEED(recvm7);
|
||
|
|
break;
|
||
|
|
case TSYNC: Syslog('x', "Got TSYSNC char");
|
||
|
|
SM_PROCEED(sendnak0);
|
||
|
|
break;
|
||
|
|
case NAK:
|
||
|
|
case 'C': Syslog('x', "Got %s waiting for block 0, sending EOT", printablec(header));
|
||
|
|
PUTCHAR(EOT); /* other end still waiting us to send? */
|
||
|
|
SM_PROCEED(waitblk0);
|
||
|
|
break;
|
||
|
|
default: Syslog('x', "Got '%s' waiting for block 0", printablec(header));
|
||
|
|
if (junk++ > 300) {
|
||
|
|
SM_PROCEED(sendnak0);
|
||
|
|
} else {
|
||
|
|
SM_PROCEED(waitblk0);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
SM_STATE(sendnak)
|
||
|
|
|
||
|
|
if (ackd_blk < 0) {
|
||
|
|
SM_PROCEED(sendnak0);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (count++ > 9) {
|
||
|
|
Syslog('+', "too many errors while xmodem receive");
|
||
|
|
SM_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
junk = 0;
|
||
|
|
|
||
|
|
if (remote_flags & FTSC_XMODEM_RES) {
|
||
|
|
if (resync(ackd_blk*XMBLKSIZ)) {
|
||
|
|
SM_ERROR;
|
||
|
|
} else {
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
}
|
||
|
|
} else { /* simple NAK */
|
||
|
|
Syslog('x', "negative acknowlege block %ld",ackd_blk+1);
|
||
|
|
|
||
|
|
if (crcmode)
|
||
|
|
PUTCHAR('C');
|
||
|
|
else
|
||
|
|
PUTCHAR(NAK);
|
||
|
|
if (SEAlink) {
|
||
|
|
PUTCHAR(ackd_blk+1);
|
||
|
|
PUTCHAR(~(ackd_blk+1));
|
||
|
|
}
|
||
|
|
if (STATUS) {
|
||
|
|
SM_ERROR;
|
||
|
|
} else {
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
SM_STATE(sendack)
|
||
|
|
|
||
|
|
Syslog('x', "xmrecv SENDACK block=%d", recv_blk);
|
||
|
|
ackd_blk = recv_blk;
|
||
|
|
count = 0;
|
||
|
|
cancount = 0;
|
||
|
|
|
||
|
|
PUTCHAR(ACK);
|
||
|
|
if (SEAlink) {
|
||
|
|
PUTCHAR(ackd_blk);
|
||
|
|
PUTCHAR(~ackd_blk);
|
||
|
|
}
|
||
|
|
if (STATUS) {
|
||
|
|
SM_ERROR;
|
||
|
|
}
|
||
|
|
if (goteot) {
|
||
|
|
SM_SUCCESS;
|
||
|
|
}
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
|
||
|
|
SM_STATE(waitblk)
|
||
|
|
|
||
|
|
header = GETCHAR(15);
|
||
|
|
if (header == TIMEOUT) {
|
||
|
|
Syslog('x', "timeout waiting for xmodem block header, count=%d", count);
|
||
|
|
SM_PROCEED(sendnak);
|
||
|
|
} else if (header < 0) {
|
||
|
|
SM_ERROR;
|
||
|
|
} else {
|
||
|
|
switch (header) {
|
||
|
|
case EOT: if (last_blk && (ackd_blk != last_blk)) {
|
||
|
|
Syslog('x', "false EOT after %ld block, need after %ld", ackd_blk,last_blk);
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
} else {
|
||
|
|
SM_PROCEED(goteof);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case CAN: if (cancount++ > 4) {
|
||
|
|
closeit(0);
|
||
|
|
Syslog('+', "Got CAN while xmodem receive");
|
||
|
|
SM_ERROR;
|
||
|
|
} else {
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case SOH: SM_PROCEED(recvblk);
|
||
|
|
break;
|
||
|
|
default: Syslog('x', "got '%s' waiting SOH", printablec(header));
|
||
|
|
if (junk++ > 200) {
|
||
|
|
SM_PROCEED(sendnak);
|
||
|
|
} else {
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
SM_STATE(recvblk)
|
||
|
|
|
||
|
|
Nopper();
|
||
|
|
GET((char*)&xmblk,(crcmode && (header != SYN))? sizeof(xmblk): sizeof(xmblk)-1,15);
|
||
|
|
if (STATUS == STAT_TIMEOUT) {
|
||
|
|
Syslog('x', "xmrecv timeout waiting for block body");
|
||
|
|
SM_PROCEED(sendnak);
|
||
|
|
}
|
||
|
|
if (STATUS) {
|
||
|
|
SM_ERROR;
|
||
|
|
}
|
||
|
|
if ((xmblk.n1 & 0xff) != ((~xmblk.n2) & 0xff)) {
|
||
|
|
Syslog('x', "bad block number: 0x%02x/0x%02x (0x%02x)", xmblk.n1,xmblk.n2,(~xmblk.n2)&0xff);
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
}
|
||
|
|
recv_blk = xmblk.n1 + (ackd_blk & ~0xff);
|
||
|
|
if (abs(recv_blk - ackd_blk) > 128)
|
||
|
|
recv_blk += 256;
|
||
|
|
|
||
|
|
if (crcmode && (header != SYN)) {
|
||
|
|
remotecrc = (short)xmblk.c1 << 8 | xmblk.c2;
|
||
|
|
localcrc = crc16xmodem((char *)xmblk.data, sizeof(xmblk.data));
|
||
|
|
if (remotecrc != localcrc) {
|
||
|
|
Syslog('x', "bad crc: 0x%04x/0x%04x",remotecrc,localcrc);
|
||
|
|
if (recv_blk == (ackd_blk+1)) {
|
||
|
|
SM_PROCEED(sendnak);
|
||
|
|
} else {
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
remotecs = xmblk.c1;
|
||
|
|
localcs = checksum((char *)xmblk.data, sizeof(xmblk.data));
|
||
|
|
if (remotecs != localcs) {
|
||
|
|
Syslog('x', "bad checksum: 0x%02x/0x%02x",remotecs,localcs);
|
||
|
|
if (recv_blk == (ackd_blk+1)) {
|
||
|
|
SM_PROCEED(sendnak);
|
||
|
|
} else {
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if ((ackd_blk == -1L) && (recv_blk == 0L)) {
|
||
|
|
SM_PROCEED(checktelink);
|
||
|
|
}
|
||
|
|
if ((ackd_blk == -1L) && (recv_blk == 1L)) {
|
||
|
|
if (count < 3) {
|
||
|
|
SM_PROCEED(sendnak0);
|
||
|
|
} else
|
||
|
|
ackd_blk=0L;
|
||
|
|
}
|
||
|
|
if (recv_blk < (ackd_blk+1L)) {
|
||
|
|
Syslog('x', "old block number %ld after %ld, go on", recv_blk,ackd_blk);
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
} else if (recv_blk > (ackd_blk+1L)) {
|
||
|
|
Syslog('x', "bad block order: %ld after %ld, go on", recv_blk,ackd_blk);
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fp == NULL) {
|
||
|
|
if ((fp = openfile(tmpfname,remtime,remsize,&resofs,resync)) == NULL) {
|
||
|
|
SM_ERROR;
|
||
|
|
} else {
|
||
|
|
if (resofs)
|
||
|
|
ackd_blk=(resofs-1)/XMBLKSIZ+1L;
|
||
|
|
else
|
||
|
|
ackd_blk=-1L;
|
||
|
|
}
|
||
|
|
startofs=resofs;
|
||
|
|
Syslog('+', "Xmodem receive: \"%s\"",tmpfname);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (recv_blk > next_blk) {
|
||
|
|
WriteError("xmrecv internal error: recv_blk %ld > next_blk %ld", recv_blk,next_blk);
|
||
|
|
SM_ERROR;
|
||
|
|
}
|
||
|
|
if (recv_blk == next_blk) {
|
||
|
|
if (recv_blk == last_blk)
|
||
|
|
wsize=remsize%XMBLKSIZ;
|
||
|
|
else
|
||
|
|
wsize=XMBLKSIZ;
|
||
|
|
if (wsize == 0)
|
||
|
|
wsize=XMBLKSIZ;
|
||
|
|
if ((tmp = fwrite(xmblk.data,wsize,1,fp)) != 1) {
|
||
|
|
WriteError("$error writing block %l (%d bytes) to file \"%s\" (fwrite return %d)",
|
||
|
|
recv_blk,wsize,fpath,tmp);
|
||
|
|
SM_ERROR;
|
||
|
|
} else
|
||
|
|
Syslog('x', "Block %ld size %d written (ret %d)", recv_blk,wsize,tmp);
|
||
|
|
next_blk++;
|
||
|
|
} else {
|
||
|
|
Syslog('x', "recv_blk %ld < next_blk %ld, ack without writing", recv_blk,next_blk);
|
||
|
|
}
|
||
|
|
SM_PROCEED(sendack);
|
||
|
|
|
||
|
|
SM_STATE(checktelink)
|
||
|
|
|
||
|
|
Syslog('x', "checktelink got \"%s\"",printable((char *)xmblk.data,45));
|
||
|
|
if (tmpfname[0] == '\0') {
|
||
|
|
strncpy(tmpfname,(char *)xmblk.data+8,16);
|
||
|
|
/*
|
||
|
|
* Some systems fill the rest of the filename with spaces, sigh.
|
||
|
|
*/
|
||
|
|
for (i = 16; i; i--) {
|
||
|
|
if ((tmpfname[i] == ' ') || (tmpfname[i] == '\0'))
|
||
|
|
tmpfname[i] = '\0';
|
||
|
|
else
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
Syslog('+', "Remote uses %s",printable((char *)xmblk.data+25,-14));
|
||
|
|
Syslog('x', "Remote file name \"%s\" discarded", printable((char *)xmblk.data+8,-16));
|
||
|
|
}
|
||
|
|
remsize = ((off_t)xmblk.data[0]) + ((off_t)xmblk.data[1]<<8) + ((off_t)xmblk.data[2]<<16) + ((off_t)xmblk.data[3]<<24);
|
||
|
|
last_blk = (remsize-1)/XMBLKSIZ+1;
|
||
|
|
if (header == SOH) {
|
||
|
|
/*
|
||
|
|
* SEAlink block
|
||
|
|
*/
|
||
|
|
remtime=sl2mtime(((time_t)xmblk.data[4])+ ((time_t)xmblk.data[5]<<8)+
|
||
|
|
((time_t)xmblk.data[6]<<16)+ ((time_t)xmblk.data[7]<<24));
|
||
|
|
if (xmblk.data[40]) {
|
||
|
|
remote_flags |= FTSC_XMODEM_SLO;
|
||
|
|
} else
|
||
|
|
remote_flags &= ~FTSC_XMODEM_SLO;
|
||
|
|
if (xmblk.data[41])
|
||
|
|
remote_flags |= FTSC_XMODEM_RES;
|
||
|
|
else
|
||
|
|
remote_flags &= ~FTSC_XMODEM_RES;
|
||
|
|
if (xmblk.data[42])
|
||
|
|
remote_flags |= FTSC_XMODEM_XOF;
|
||
|
|
else
|
||
|
|
remote_flags &= ~FTSC_XMODEM_XOF;
|
||
|
|
} else if (header == SYN) {
|
||
|
|
/*
|
||
|
|
* Telink block
|
||
|
|
*/
|
||
|
|
remtime=tl2mtime(((time_t)xmblk.data[4])+ ((time_t)xmblk.data[5]<<8)+
|
||
|
|
((time_t)xmblk.data[6]<<16)+ ((time_t)xmblk.data[7]<<24));
|
||
|
|
if (xmblk.data[41])
|
||
|
|
session_flags |= FTSC_XMODEM_CRC;
|
||
|
|
else
|
||
|
|
session_flags &= ~FTSC_XMODEM_CRC;
|
||
|
|
} else {
|
||
|
|
WriteError("Got data block with header 0x%02x", header);
|
||
|
|
SM_PROCEED(sendnak0);
|
||
|
|
}
|
||
|
|
|
||
|
|
Syslog('x', "%s block, session_flags=0x%04x, remote_flags=0x%04x",
|
||
|
|
(header == SYN)?"Telink":"Sealink",session_flags,remote_flags);
|
||
|
|
|
||
|
|
if ((fp = openfile(tmpfname,remtime,remsize,&resofs,resync)) == NULL) {
|
||
|
|
SM_ERROR;
|
||
|
|
}
|
||
|
|
if (resofs)
|
||
|
|
ackd_blk=(resofs-1)/XMBLKSIZ+1L;
|
||
|
|
else
|
||
|
|
ackd_blk=-1L;
|
||
|
|
startofs=resofs;
|
||
|
|
|
||
|
|
Syslog('+', "Xmodem %s receive: \"%s\" %ld bytes dated %s", (header == SYN)?"Telink":"Sealink",
|
||
|
|
tmpfname, remsize, rfcdate(remtime));
|
||
|
|
|
||
|
|
if (ackd_blk == -1) {
|
||
|
|
SM_PROCEED(sendack);
|
||
|
|
} else {
|
||
|
|
SM_PROCEED(waitblk);
|
||
|
|
}
|
||
|
|
|
||
|
|
SM_STATE(recvm7)
|
||
|
|
|
||
|
|
switch (m7recv(tmpfname)) {
|
||
|
|
case 0: ackd_blk=0;
|
||
|
|
SM_PROCEED(sendnak);
|
||
|
|
break;
|
||
|
|
case 1: last=1;
|
||
|
|
SM_SUCCESS;
|
||
|
|
break;
|
||
|
|
default: SM_PROCEED(sendnak);
|
||
|
|
}
|
||
|
|
|
||
|
|
SM_STATE(goteof)
|
||
|
|
|
||
|
|
closeit(1);
|
||
|
|
if (ackd_blk == -1L)
|
||
|
|
last=1;
|
||
|
|
else {
|
||
|
|
ackd_blk++;
|
||
|
|
PUTCHAR(ACK);
|
||
|
|
if (SEAlink) {
|
||
|
|
PUTCHAR(ackd_blk);
|
||
|
|
PUTCHAR(~ackd_blk);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (STATUS) {
|
||
|
|
SM_ERROR;
|
||
|
|
}
|
||
|
|
SM_SUCCESS;
|
||
|
|
|
||
|
|
SM_END
|
||
|
|
SM_RETURN
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
int resync(off_t resofs)
|
||
|
|
{
|
||
|
|
char resynbuf[16];
|
||
|
|
short lcrc;
|
||
|
|
int count=0;
|
||
|
|
int gotack,gotnak;
|
||
|
|
int c;
|
||
|
|
int sblk;
|
||
|
|
|
||
|
|
Syslog('x', "trying to resync at offset %d", (int)resofs);
|
||
|
|
|
||
|
|
sblk=resofs/XMBLKSIZ+1;
|
||
|
|
snprintf(resynbuf,16,"%d",sblk);
|
||
|
|
lcrc=crc16xmodem(resynbuf,strlen(resynbuf));
|
||
|
|
gotack=0;
|
||
|
|
gotnak=0;
|
||
|
|
|
||
|
|
do {
|
||
|
|
count++;
|
||
|
|
PUTCHAR(SYN);
|
||
|
|
PUTSTR(resynbuf);
|
||
|
|
PUTCHAR(ETX);
|
||
|
|
PUTCHAR(lcrc&0xff);
|
||
|
|
PUTCHAR(lcrc>>8);
|
||
|
|
do {
|
||
|
|
if ((c=GETCHAR(5)) == ACK) {
|
||
|
|
if ((c=GETCHAR(1)) == SOH)
|
||
|
|
gotack=1;
|
||
|
|
UNGETCHAR(c);
|
||
|
|
} else if (c == NAK) {
|
||
|
|
if ((c=GETCHAR(1)) == TIMEOUT)
|
||
|
|
gotnak=1;
|
||
|
|
UNGETCHAR(c);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while (!gotack && !gotnak && (c >= 0));
|
||
|
|
if ((c < 0) && (c != TIMEOUT))
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
while (!gotack && !gotnak && (count < 6));
|
||
|
|
|
||
|
|
if (gotack) {
|
||
|
|
Syslog('x', "resyncing at offset %ld",resofs);
|
||
|
|
return 0;
|
||
|
|
} else {
|
||
|
|
Syslog('+', "sealink resync at offset %ld failed",resofs);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|