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deb-mbse/mbcico/xmsend.c

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/*****************************************************************************
*
* $Id: xmsend.c,v 1.11 2005/10/11 20:49:46 mbse Exp $
* Purpose ...............: Fidonet mailer
*
*****************************************************************************
* Copyright (C) 1997-2005
*
* 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 "xmsend.h"
#include "m7send.h"
#include "filelist.h"
#include "filetime.h"
#define XMBLKSIZ 128
#define DEFAULT_WINDOW 127
static char *ln,*rn;
static int flg;
static int xm_send(void);
extern unsigned int sentbytes;
int xmsend(char *local, char *Remote, int fl)
{
int rc;
ln=local;
rn=Remote;
flg=fl;
rc=xm_send();
if (rc)
Syslog('+', "xmsend failed");
return rc;
}
SM_DECL(xm_send,(char *)"xmsend")
SM_STATES
sendm7,
sendblk0,
waitack0,
sendblk,
writeblk,
waitack,
resync,
sendeot
SM_NAMES
(char *)"sendm7",
(char *)"sendblk0",
(char *)"waitack0",
(char *)"sendblk",
(char *)"writeblk",
(char *)"waitack",
(char *)"resync",
(char *)"sendeot"
SM_EDECL
FILE *fp;
struct stat st;
struct flock fl;
unsigned short lcrc=0,rcrc;
int startstate;
int crcmode,seamode,telink;
int a,a1,a2;
int i;
time_t seatime;
struct timeval starttime, endtime;
struct timezone tz;
unsigned char header=SOH;
struct _xmblk {
unsigned char n1;
unsigned char n2;
char data[XMBLKSIZ];
unsigned char c1;
unsigned char c2;
} xmblk;
int count=0;
int cancount=0;
int window;
int last_blk;
int send_blk;
int next_blk;
int ackd_blk;
int tmp;
char resynbuf[16];
fl.l_type=F_RDLCK;
fl.l_whence=0;
fl.l_start=0L;
fl.l_len=0L;
gettimeofday(&starttime, &tz);
/* if we got 'C' than hopefully remote is sealink capable... */
if (session_flags & FTSC_XMODEM_CRC) {
telink=0;
crcmode=1;
session_flags |= FTSC_XMODEM_RES;
session_flags |= FTSC_XMODEM_SLO;
session_flags |= FTSC_XMODEM_XOF;
window=DEFAULT_WINDOW;
send_blk=0L;
next_blk=0L;
ackd_blk=-1L;
startstate=sendblk0;
} else {
telink=1;
crcmode=0;
session_flags &= ~FTSC_XMODEM_RES;
session_flags |= FTSC_XMODEM_SLO;
session_flags |= FTSC_XMODEM_XOF;
window=1;
send_blk=0L;
next_blk=0L;
ackd_blk=-1L;
if (flg && !(session_flags & SESSION_IFNA))
startstate = sendm7;
else
startstate = sendblk0;
}
seamode=-1; /* not yet sure about numbered ACKs */
if (stat(ln,&st) != 0) {
WriteError("$cannot stat local file \"%s\" to send",MBSE_SS(ln));
return 1;
}
last_blk=(st.st_size-1)/XMBLKSIZ+1;
if ((fp=fopen(ln,"r")) == NULL) {
WriteError("$cannot open local file \"%s\" to send",MBSE_SS(ln));
return 1;
}
fl.l_pid = getpid();
if (fcntl(fileno(fp),F_SETLK,&fl) != 0) {
WriteError("$cannot lock local file \"%s\" to send, skip it",MBSE_SS(ln));
return 0;
}
if (stat(ln,&st) != 0) {
WriteError("$cannot access local file \"%s\" to send, skip it",MBSE_SS(ln));
return 0;
}
Syslog('+', "Xmodem send \"%s\" as \"%s\", size=%lu", MBSE_SS(ln),MBSE_SS(rn),(unsigned long)st.st_size);
sentbytes += (unsigned long)st.st_size;
SM_START(startstate)
SM_STATE(sendm7)
if (m7send(rn)) {
SM_PROCEED(sendblk0);
} else {
SM_ERROR;
}
SM_STATE(sendblk0)
Syslog('x', "xmsendblk0 send:%ld, next:%ld, ackd:%ld, last:%ld", send_blk,next_blk,ackd_blk,last_blk);
memset(xmblk.data,0,sizeof(xmblk.data));
xmblk.data[0]=(st.st_size)&0xff;
xmblk.data[1]=(st.st_size>>8)&0xff;
xmblk.data[2]=(st.st_size>>16)&0xff;
xmblk.data[3]=(st.st_size>>24)&0xff;
seatime=mtime2sl(st.st_mtime);
xmblk.data[4]=(seatime)&0xff;
xmblk.data[5]=(seatime>>8)&0xff;
xmblk.data[6]=(seatime>>16)&0xff;
xmblk.data[7]=(seatime>>24)&0xff;
strncpy(xmblk.data+8,rn,17);
if (telink)
for (i=23;(i>8) && (xmblk.data[i] == '\0');i--)
xmblk.data[i]=' ';
snprintf(xmblk.data+25, 15, "mbcico %s", VERSION);
xmblk.data[40]=((session_flags & FTSC_XMODEM_SLO) != 0);
xmblk.data[41]=((session_flags & FTSC_XMODEM_RES) != 0);
xmblk.data[42]=((session_flags & FTSC_XMODEM_XOF) != 0);
Syslog('x', "sealink block: \"%s\"",printable(xmblk.data,44));
next_blk=send_blk+1;
SM_PROCEED(sendblk);
SM_STATE(sendblk)
Syslog('x', "xmsendblk send:%ld, next:%ld, ackd:%ld, last:%ld", send_blk,next_blk,ackd_blk,last_blk);
if (send_blk == 0) {
SM_PROCEED(writeblk);
}
if (send_blk > last_blk) {
Syslog('x', "send_blk > last_blk");
if (send_blk == (last_blk+1)) {
SM_PROCEED(sendeot);
} else if (ackd_blk < last_blk) {
SM_PROCEED(waitack);
} else {
gettimeofday(&endtime, &tz);
Syslog('+', "Xmodem: OK %s", transfertime(starttime, endtime, st.st_size, TRUE));
sentbytes += (unsigned long)st.st_size;
fclose(fp);
SM_SUCCESS;
}
}
memset(xmblk.data, SUB, sizeof(xmblk.data));
if (send_blk != next_blk)
if (fseek(fp,(send_blk-1)*XMBLKSIZ,SEEK_SET) != 0) {
WriteError("$fseek error setting block %ld (byte %lu) in file \"%s\"",
send_blk,(send_blk-1)*XMBLKSIZ,MBSE_SS(ln));
SM_ERROR;
}
if (fread(xmblk.data,1,XMBLKSIZ,fp) <= 0) {
WriteError("$read error for block %lu in file \"%s\"", send_blk,MBSE_SS(ln));
SM_ERROR;
}
next_blk=send_blk+1;
SM_PROCEED(writeblk);
SM_STATE(writeblk)
Nopper();
xmblk.n1=send_blk&0xff;
xmblk.n2=~xmblk.n1;
if (crcmode) {
lcrc=crc16xmodem(xmblk.data,sizeof(xmblk.data));
xmblk.c1=(lcrc>>8)&0xff;
xmblk.c2=lcrc&0xff;
} else {
xmblk.c1=checksum(xmblk.data,sizeof(xmblk.data));
}
PUTCHAR(header);
PUT((char*)&xmblk,crcmode?sizeof(xmblk):sizeof(xmblk)-1);
if (STATUS) {
SM_ERROR;
}
if (crcmode)
Syslog('x', "sent '0x%02x',no 0x%02x, %d bytes crc 0x%04x", header, xmblk.n1, XMBLKSIZ, lcrc);
else
Syslog('x', "sent '0x%02x',no 0x%02x, %d bytes checksum 0x%02x", header, xmblk.n1, XMBLKSIZ, xmblk.c1);
send_blk++;
SM_PROCEED(waitack);
SM_STATE(waitack)
if ((count > 4) && (ackd_blk < 0)) {
Syslog('+', "Cannot send sealink block, try xmodem");
window=1;
ackd_blk++;
SM_PROCEED(sendblk);
}
if (count > 9) {
Syslog('+', "Too many errors in xmodem send");
SM_ERROR;
}
if (!((ackd_blk < 0) || (send_blk > (last_blk+1)) || ((send_blk-ackd_blk) > window))) {
if ((WAITPUTGET(0) & 3) == 2) {
SM_PROCEED(sendblk);
}
}
a = GETCHAR(20);
if (a == TIMEOUT) {
if (count++ > 9) {
Syslog('+', "too many tries to send block");
SM_ERROR;
}
Syslog('x', "timeout waiting for ACK");
send_blk=ackd_blk+1;
SM_PROCEED(sendblk);
} else if (a < 0) {
SM_ERROR;
} else switch (a) {
case ACK:
Syslog('x', "got ACK seamode=%d", seamode);
count=0;
cancount=0;
switch (seamode) {
case -1:if ((a1=GETCHAR(1)) < 0) {
seamode=0;
UNGETCHAR(a);
SM_PROCEED(waitack);
} else if ((a2=GETCHAR(1)) < 0) {
seamode=0;
UNGETCHAR(a1);
UNGETCHAR(a);
SM_PROCEED(waitack);
} else if ((a1&0xff) != ((~a2)&0xff)) {
seamode=0;
UNGETCHAR(a2);
UNGETCHAR(a1);
UNGETCHAR(a);
SM_PROCEED(waitack);
} else {
seamode=1;
UNGETCHAR(a2);
UNGETCHAR(a1);
UNGETCHAR(a);
SM_PROCEED(waitack);
}
break;
case 0:
ackd_blk++;
SM_PROCEED(sendblk);
break;
case 1:
a1=GETCHAR(1);
a2=GETCHAR(1);
if ((a1 < 0) || (a2 < 0) || (a1 != ((~a2)&0xff))) {
Syslog('x', "bad ACK: 0x%02x/0x%02x, ignore", a1,a2);
SM_PROCEED(sendblk);
} else {
if (a1 == ((send_blk-1) & 0xff)) {
/* FD seems only to ACK last received block which is allright, 31-12-2000 MB. */
Syslog('x', "got ACK %d", a1);
} else if (a1 != ((ackd_blk+1) & 0xff)) {
Syslog('x', "got ACK %d, expected %d", a1,(ackd_blk+1)&0xff);
ackd_blk++;
}
tmp=send_blk-((send_blk-a1)&0xff);
if ((tmp > ackd_blk) && (tmp < send_blk))
ackd_blk=tmp;
else
Syslog('x', "bad ACK: %ld, ignore", a1,a2);
if ((ackd_blk+1) == send_blk) {
SM_PROCEED(sendblk);
} else { /* read them all if more than 1 */
SM_PROCEED(waitack);
}
}
break;
}
break;
case NAK: if (ackd_blk <= 0)
crcmode=0;
count++;
send_blk=ackd_blk+1;
SM_PROCEED(sendblk);
break;
case SYN: SM_PROCEED(resync);
break;
case DC3: if (session_flags & FTSC_XMODEM_XOF) {
while (((a=GETCHAR(15)) > 0) && (a != DC1))
Syslog('x', "got '%s' waiting for DC1", printablec(a));
}
SM_PROCEED(waitack);
break;
case CAN: if (cancount++ > 5) {
Syslog('+', "Remote requested cancel transfer");
SM_ERROR;
} else {
SM_PROCEED(waitack);
}
break;
case 'C': if (ackd_blk < 0) {
crcmode=1;
count++;
send_blk=ackd_blk+1;
SM_PROCEED(sendblk);
}
/* fallthru */
default: Syslog('x', "Got '%s' waiting for ACK",printablec(a));
SM_PROCEED(waitack);
break;
}
SM_STATE(resync)
if (count++ > 9) {
Syslog('+', "too may tries to resync");
SM_ERROR;
}
i=-1;
do {
a=GETCHAR(15);
resynbuf[++i]=a;
}
while ((a >= '0') && (a <= '9') && (i < sizeof(resynbuf)-1));
resynbuf[i]='\0';
Syslog('x', "got resync \"%s\", i=%d",resynbuf,i);
lcrc=crc16xmodem(resynbuf,strlen(resynbuf));
rcrc=0;
if (a != ETX) {
if (a > 0)
Syslog('+', "Got %d waiting for resync",a);
else
Syslog('+', "Got %s waiting for resync",printablec(a));
PUTCHAR(NAK);
SM_PROCEED(waitack);
}
if ((a=GETCHAR(1)) < 0) {
PUTCHAR(NAK);
SM_PROCEED(waitack);
}
rcrc=a&0xff;
if ((a=GETCHAR(1)) < 0) {
PUTCHAR(NAK);
SM_PROCEED(waitack);
}
rcrc |= (a << 8);
if (rcrc != lcrc) {
Syslog('+', "Bad resync crc: 0x%04x != 0x%04x",lcrc,rcrc);
PUTCHAR(NAK);
SM_PROCEED(waitack);
}
send_blk=atol(resynbuf);
ackd_blk=send_blk-1;
Syslog('+', "Resyncing at block %ld (byte %lu)", send_blk,(send_blk-1L)*XMBLKSIZ);
PUTCHAR(ACK);
SM_PROCEED(sendblk);
SM_STATE(sendeot)
PUTCHAR(EOT);
if (STATUS) {
SM_ERROR;
}
send_blk++;
SM_PROCEED(waitack);
SM_END
SM_RETURN
int xmsndfiles(file_list *tosend)
{
int rc,c = 0,gotnak,count;
file_list *nextsend;
Syslog('x', "Xmodem send files start");
for (nextsend=tosend;nextsend;nextsend=nextsend->next) {
if (*(nextsend->local) != '~') {
if (nextsend->remote) {
if ((rc=xmsend(nextsend->local,nextsend->remote, (nextsend != tosend)))) {/* send m7 for rest */
Syslog('x', "Xmodem send files failed, rc=%d", rc);
return rc; /* and thus avoid execute_disposition() */
} else {
gotnak=0;
count=0;
while (!gotnak && (count < 6)) {
c=GETCHAR(15);
if (c < 0)
return STATUS;
if (c == CAN) {
Syslog('+', "Remote refused receiving");
return 1;
}
if ((c == 'C') || (c == NAK))
gotnak=1;
else
Syslog('x', "Got '%s' waiting NAK", printablec(c));
}
if (c == 'C')
session_flags |= FTSC_XMODEM_CRC;
if (!gotnak)
return 1;
}
}
execute_disposition(nextsend);
}
}
Syslog('x', "Xmodem send files finished");
PUTCHAR(EOT);
return STATUS;
}